[PATCH 02/15] net-lwip: import lwIP library under lib/lwip

Import the Lightweight IP (lwIP) library as lib/lwip. The code is built when CONFIG_NET_LWIP=y.

The lwIP code was imported with the following commands:

(cd /tmp && git clone https://git.savannah.gnu.org/git/lwip.git -b STABLE-2_2_0_RELEASE) mkdir -p lib/lwip cp -R /tmp/lwip/src/{api,core,include} lib/lwip/ mkdir -p lib/lwip/netif && cp /tmp/lwip/src/netif/ethernet.c lib/lwip/netif/ mkdir -p lib/lwip/apps/tftp && cp /tmp/lwip/src/apps/tftp/tftp.c lib/lwip/apps/tftp/ mkdir -p lib/lwip/apps/http && cp /tmp/lwip/src/apps/http/http_client.c lib/lwip/apps/http/

The list of object files added to lib/liwip/Makefile was given by:

(cd lib/lwip && find . -name *.c | sort | sed 's@./@\t@' | sed 's/.c$/.o \/') >>lib/liwip/Makefile

These files are adaptation layers written specially for U-Boot:

lib/lwip/u-boot/arch/cc.h lib/lwip/u-boot/arch/sys_arch.h (empty) lib/lwip/u-boot/limits.h (empty) lib/lwip/u-boot/lwipopts.h

They were initially contributed by Maxim in a previous RFC patch series.

Signed-off-by: Jerome Forissier jerome.forissier@linaro.org Co-developed-by: Maxim Uvarov muvarov@gmail.com Cc: Maxim Uvarov muvarov@gmail.com --- lib/Makefile | 2 + lib/lwip/Makefile | 57 + lib/lwip/README | 6 + lib/lwip/api/api_lib.c | 1367 ++++++ lib/lwip/api/api_msg.c | 2177 +++++++++ lib/lwip/api/err.c | 115 + lib/lwip/api/if_api.c | 102 + lib/lwip/api/netbuf.c | 250 + lib/lwip/api/netdb.c | 422 ++ lib/lwip/api/netifapi.c | 380 ++ lib/lwip/api/sockets.c | 4205 +++++++++++++++++ lib/lwip/api/tcpip.c | 706 +++ lib/lwip/apps/http/http_client.c | 911 ++++ lib/lwip/apps/tftp/tftp.c | 548 +++ lib/lwip/core/altcp.c | 717 +++ lib/lwip/core/altcp_alloc.c | 87 + lib/lwip/core/altcp_tcp.c | 578 +++ lib/lwip/core/def.c | 263 ++ lib/lwip/core/dns.c | 1657 +++++++ lib/lwip/core/inet_chksum.c | 608 +++ lib/lwip/core/init.c | 387 ++ lib/lwip/core/ip.c | 167 + lib/lwip/core/ipv4/acd.c | 557 +++ lib/lwip/core/ipv4/autoip.c | 379 ++ lib/lwip/core/ipv4/dhcp.c | 1999 ++++++++ lib/lwip/core/ipv4/etharp.c | 1251 +++++ lib/lwip/core/ipv4/icmp.c | 407 ++ lib/lwip/core/ipv4/igmp.c | 801 ++++ lib/lwip/core/ipv4/ip4.c | 1166 +++++ lib/lwip/core/ipv4/ip4_addr.c | 323 ++ lib/lwip/core/ipv4/ip4_frag.c | 894 ++++ lib/lwip/core/ipv6/dhcp6.c | 821 ++++ lib/lwip/core/ipv6/ethip6.c | 123 + lib/lwip/core/ipv6/icmp6.c | 425 ++ lib/lwip/core/ipv6/inet6.c | 53 + lib/lwip/core/ipv6/ip6.c | 1494 ++++++ lib/lwip/core/ipv6/ip6_addr.c | 355 ++ lib/lwip/core/ipv6/ip6_frag.c | 862 ++++ lib/lwip/core/ipv6/mld6.c | 626 +++ lib/lwip/core/ipv6/nd6.c | 2474 ++++++++++ lib/lwip/core/mem.c | 1017 ++++ lib/lwip/core/memp.c | 447 ++ lib/lwip/core/netif.c | 1855 ++++++++ lib/lwip/core/pbuf.c | 1545 ++++++ lib/lwip/core/raw.c | 673 +++ lib/lwip/core/stats.c | 168 + lib/lwip/core/sys.c | 148 + lib/lwip/core/tcp.c | 2696 +++++++++++ lib/lwip/core/tcp_in.c | 2184 +++++++++ lib/lwip/core/tcp_out.c | 2257 +++++++++ lib/lwip/core/timeouts.c | 451 ++ lib/lwip/core/udp.c | 1321 ++++++ lib/lwip/include/compat/posix/arpa/inet.h | 33 + lib/lwip/include/compat/posix/net/if.h | 36 + lib/lwip/include/compat/posix/netdb.h | 33 + lib/lwip/include/compat/posix/sys/socket.h | 33 + lib/lwip/include/compat/stdc/errno.h | 33 + lib/lwip/include/lwip/acd.h | 109 + lib/lwip/include/lwip/altcp.h | 207 + lib/lwip/include/lwip/altcp_tcp.h | 72 + lib/lwip/include/lwip/altcp_tls.h | 196 + lib/lwip/include/lwip/api.h | 434 ++ lib/lwip/include/lwip/apps/FILES | 2 + .../include/lwip/apps/altcp_proxyconnect.h | 79 + .../lwip/apps/altcp_tls_mbedtls_opts.h | 111 + lib/lwip/include/lwip/apps/fs.h | 139 + lib/lwip/include/lwip/apps/http_client.h | 160 + lib/lwip/include/lwip/apps/httpd.h | 256 + lib/lwip/include/lwip/apps/httpd_opts.h | 416 ++ lib/lwip/include/lwip/apps/lwiperf.h | 109 + lib/lwip/include/lwip/apps/mdns.h | 154 + lib/lwip/include/lwip/apps/mdns_domain.h | 80 + lib/lwip/include/lwip/apps/mdns_opts.h | 121 + lib/lwip/include/lwip/apps/mdns_out.h | 138 + lib/lwip/include/lwip/apps/mdns_priv.h | 237 + lib/lwip/include/lwip/apps/mqtt.h | 205 + lib/lwip/include/lwip/apps/mqtt_opts.h | 103 + lib/lwip/include/lwip/apps/mqtt_priv.h | 104 + lib/lwip/include/lwip/apps/netbiosns.h | 51 + lib/lwip/include/lwip/apps/netbiosns_opts.h | 66 + lib/lwip/include/lwip/apps/smtp.h | 128 + lib/lwip/include/lwip/apps/smtp_opts.h | 80 + lib/lwip/include/lwip/apps/snmp.h | 145 + lib/lwip/include/lwip/apps/snmp_core.h | 377 ++ lib/lwip/include/lwip/apps/snmp_mib2.h | 78 + lib/lwip/include/lwip/apps/snmp_opts.h | 297 ++ lib/lwip/include/lwip/apps/snmp_scalar.h | 113 + .../include/lwip/apps/snmp_snmpv2_framework.h | 32 + lib/lwip/include/lwip/apps/snmp_snmpv2_usm.h | 24 + lib/lwip/include/lwip/apps/snmp_table.h | 134 + lib/lwip/include/lwip/apps/snmp_threadsync.h | 114 + lib/lwip/include/lwip/apps/snmpv3.h | 114 + lib/lwip/include/lwip/apps/sntp.h | 81 + lib/lwip/include/lwip/apps/sntp_opts.h | 215 + lib/lwip/include/lwip/apps/tftp_client.h | 50 + lib/lwip/include/lwip/apps/tftp_common.h | 108 + lib/lwip/include/lwip/apps/tftp_opts.h | 106 + lib/lwip/include/lwip/apps/tftp_server.h | 42 + lib/lwip/include/lwip/arch.h | 402 ++ lib/lwip/include/lwip/autoip.h | 90 + lib/lwip/include/lwip/debug.h | 161 + lib/lwip/include/lwip/def.h | 156 + lib/lwip/include/lwip/dhcp.h | 155 + lib/lwip/include/lwip/dhcp6.h | 104 + lib/lwip/include/lwip/dns.h | 131 + lib/lwip/include/lwip/err.h | 117 + lib/lwip/include/lwip/errno.h | 198 + lib/lwip/include/lwip/etharp.h | 110 + lib/lwip/include/lwip/ethip6.h | 68 + lib/lwip/include/lwip/icmp.h | 110 + lib/lwip/include/lwip/icmp6.h | 72 + lib/lwip/include/lwip/if_api.h | 70 + lib/lwip/include/lwip/igmp.h | 115 + lib/lwip/include/lwip/inet.h | 188 + lib/lwip/include/lwip/inet_chksum.h | 104 + lib/lwip/include/lwip/init.h | 100 + lib/lwip/include/lwip/init.h.cmake.in | 100 + lib/lwip/include/lwip/ip.h | 339 ++ lib/lwip/include/lwip/ip4.h | 109 + lib/lwip/include/lwip/ip4_addr.h | 225 + lib/lwip/include/lwip/ip4_frag.h | 100 + lib/lwip/include/lwip/ip6.h | 93 + lib/lwip/include/lwip/ip6_addr.h | 372 ++ lib/lwip/include/lwip/ip6_frag.h | 144 + lib/lwip/include/lwip/ip6_zone.h | 306 ++ lib/lwip/include/lwip/ip_addr.h | 468 ++ lib/lwip/include/lwip/mem.h | 82 + lib/lwip/include/lwip/memp.h | 155 + lib/lwip/include/lwip/mld6.h | 99 + lib/lwip/include/lwip/nd6.h | 90 + lib/lwip/include/lwip/netbuf.h | 116 + lib/lwip/include/lwip/netdb.h | 150 + lib/lwip/include/lwip/netif.h | 698 +++ lib/lwip/include/lwip/netifapi.h | 161 + lib/lwip/include/lwip/opt.h | 3595 ++++++++++++++ lib/lwip/include/lwip/pbuf.h | 326 ++ lib/lwip/include/lwip/priv/altcp_priv.h | 159 + lib/lwip/include/lwip/priv/api_msg.h | 272 ++ lib/lwip/include/lwip/priv/mem_priv.h | 84 + lib/lwip/include/lwip/priv/memp_priv.h | 161 + lib/lwip/include/lwip/priv/memp_std.h | 153 + lib/lwip/include/lwip/priv/nd6_priv.h | 143 + lib/lwip/include/lwip/priv/raw_priv.h | 69 + lib/lwip/include/lwip/priv/sockets_priv.h | 175 + lib/lwip/include/lwip/priv/tcp_priv.h | 523 ++ lib/lwip/include/lwip/priv/tcpip_priv.h | 176 + lib/lwip/include/lwip/prot/acd.h | 91 + lib/lwip/include/lwip/prot/autoip.h | 65 + lib/lwip/include/lwip/prot/dhcp.h | 178 + lib/lwip/include/lwip/prot/dhcp6.h | 138 + lib/lwip/include/lwip/prot/dns.h | 140 + lib/lwip/include/lwip/prot/etharp.h | 114 + lib/lwip/include/lwip/prot/ethernet.h | 127 + lib/lwip/include/lwip/prot/iana.h | 97 + lib/lwip/include/lwip/prot/icmp.h | 105 + lib/lwip/include/lwip/prot/icmp6.h | 172 + lib/lwip/include/lwip/prot/ieee.h | 91 + lib/lwip/include/lwip/prot/igmp.h | 90 + lib/lwip/include/lwip/prot/ip.h | 59 + lib/lwip/include/lwip/prot/ip4.h | 131 + lib/lwip/include/lwip/prot/ip6.h | 235 + lib/lwip/include/lwip/prot/mld6.h | 71 + lib/lwip/include/lwip/prot/nd6.h | 274 ++ lib/lwip/include/lwip/prot/tcp.h | 100 + lib/lwip/include/lwip/prot/udp.h | 68 + lib/lwip/include/lwip/raw.h | 143 + lib/lwip/include/lwip/sio.h | 142 + lib/lwip/include/lwip/snmp.h | 213 + lib/lwip/include/lwip/sockets.h | 707 +++ lib/lwip/include/lwip/stats.h | 491 ++ lib/lwip/include/lwip/sys.h | 575 +++ lib/lwip/include/lwip/tcp.h | 500 ++ lib/lwip/include/lwip/tcpbase.h | 88 + lib/lwip/include/lwip/tcpip.h | 114 + lib/lwip/include/lwip/timeouts.h | 128 + lib/lwip/include/lwip/udp.h | 195 + lib/lwip/include/netif/bridgeif.h | 127 + lib/lwip/include/netif/bridgeif_opts.h | 90 + lib/lwip/include/netif/etharp.h | 3 + lib/lwip/include/netif/ethernet.h | 77 + lib/lwip/include/netif/ieee802154.h | 112 + lib/lwip/include/netif/lowpan6.h | 89 + lib/lwip/include/netif/lowpan6_ble.h | 78 + lib/lwip/include/netif/lowpan6_common.h | 82 + lib/lwip/include/netif/lowpan6_opts.h | 122 + lib/lwip/include/netif/ppp/ccp.h | 164 + lib/lwip/include/netif/ppp/chap-md5.h | 36 + lib/lwip/include/netif/ppp/chap-new.h | 200 + lib/lwip/include/netif/ppp/chap_ms.h | 44 + lib/lwip/include/netif/ppp/eap.h | 169 + lib/lwip/include/netif/ppp/ecp.h | 62 + lib/lwip/include/netif/ppp/eui64.h | 102 + lib/lwip/include/netif/ppp/fsm.h | 182 + lib/lwip/include/netif/ppp/ipcp.h | 134 + lib/lwip/include/netif/ppp/ipv6cp.h | 191 + lib/lwip/include/netif/ppp/lcp.h | 179 + lib/lwip/include/netif/ppp/magic.h | 130 + lib/lwip/include/netif/ppp/mppe.h | 181 + lib/lwip/include/netif/ppp/polarssl/arc4.h | 81 + lib/lwip/include/netif/ppp/polarssl/des.h | 92 + lib/lwip/include/netif/ppp/polarssl/md4.h | 97 + lib/lwip/include/netif/ppp/polarssl/md5.h | 96 + lib/lwip/include/netif/ppp/polarssl/sha1.h | 96 + lib/lwip/include/netif/ppp/ppp.h | 698 +++ lib/lwip/include/netif/ppp/ppp_impl.h | 736 +++ lib/lwip/include/netif/ppp/ppp_opts.h | 610 +++ lib/lwip/include/netif/ppp/pppapi.h | 137 + lib/lwip/include/netif/ppp/pppcrypt.h | 144 + lib/lwip/include/netif/ppp/pppdebug.h | 88 + lib/lwip/include/netif/ppp/pppoe.h | 187 + lib/lwip/include/netif/ppp/pppol2tp.h | 209 + lib/lwip/include/netif/ppp/pppos.h | 125 + lib/lwip/include/netif/ppp/upap.h | 131 + lib/lwip/include/netif/ppp/vj.h | 169 + lib/lwip/include/netif/slipif.h | 86 + lib/lwip/include/netif/zepif.h | 81 + lib/lwip/netif/ethernet.c | 329 ++ lib/lwip/u-boot/arch/cc.h | 43 + lib/lwip/u-boot/arch/sys_arch.h | 0 lib/lwip/u-boot/limits.h | 0 lib/lwip/u-boot/lwipopts.h | 197 + net-lwip/Kconfig | 40 +- 222 files changed, 76200 insertions(+), 1 deletion(-) create mode 100644 lib/lwip/Makefile create mode 100644 lib/lwip/README create mode 100644 lib/lwip/api/api_lib.c create mode 100644 lib/lwip/api/api_msg.c create mode 100644 lib/lwip/api/err.c create mode 100644 lib/lwip/api/if_api.c create mode 100644 lib/lwip/api/netbuf.c create mode 100644 lib/lwip/api/netdb.c create mode 100644 lib/lwip/api/netifapi.c create mode 100644 lib/lwip/api/sockets.c create mode 100644 lib/lwip/api/tcpip.c create mode 100644 lib/lwip/apps/http/http_client.c create mode 100644 lib/lwip/apps/tftp/tftp.c create mode 100644 lib/lwip/core/altcp.c create mode 100644 lib/lwip/core/altcp_alloc.c create mode 100644 lib/lwip/core/altcp_tcp.c create mode 100644 lib/lwip/core/def.c create mode 100644 lib/lwip/core/dns.c create mode 100644 lib/lwip/core/inet_chksum.c create mode 100644 lib/lwip/core/init.c create mode 100644 lib/lwip/core/ip.c create mode 100644 lib/lwip/core/ipv4/acd.c create mode 100644 lib/lwip/core/ipv4/autoip.c create mode 100644 lib/lwip/core/ipv4/dhcp.c create mode 100644 lib/lwip/core/ipv4/etharp.c create mode 100644 lib/lwip/core/ipv4/icmp.c create mode 100644 lib/lwip/core/ipv4/igmp.c create mode 100644 lib/lwip/core/ipv4/ip4.c create mode 100644 lib/lwip/core/ipv4/ip4_addr.c create mode 100644 lib/lwip/core/ipv4/ip4_frag.c create mode 100644 lib/lwip/core/ipv6/dhcp6.c create mode 100644 lib/lwip/core/ipv6/ethip6.c create mode 100644 lib/lwip/core/ipv6/icmp6.c create mode 100644 lib/lwip/core/ipv6/inet6.c create mode 100644 lib/lwip/core/ipv6/ip6.c create mode 100644 lib/lwip/core/ipv6/ip6_addr.c create mode 100644 lib/lwip/core/ipv6/ip6_frag.c create mode 100644 lib/lwip/core/ipv6/mld6.c create mode 100644 lib/lwip/core/ipv6/nd6.c create mode 100644 lib/lwip/core/mem.c create mode 100644 lib/lwip/core/memp.c create mode 100644 lib/lwip/core/netif.c create mode 100644 lib/lwip/core/pbuf.c create mode 100644 lib/lwip/core/raw.c create mode 100644 lib/lwip/core/stats.c create mode 100644 lib/lwip/core/sys.c create mode 100644 lib/lwip/core/tcp.c create mode 100644 lib/lwip/core/tcp_in.c create mode 100644 lib/lwip/core/tcp_out.c create mode 100644 lib/lwip/core/timeouts.c create mode 100644 lib/lwip/core/udp.c create mode 100644 lib/lwip/include/compat/posix/arpa/inet.h create mode 100644 lib/lwip/include/compat/posix/net/if.h create mode 100644 lib/lwip/include/compat/posix/netdb.h create mode 100644 lib/lwip/include/compat/posix/sys/socket.h create mode 100644 lib/lwip/include/compat/stdc/errno.h create mode 100644 lib/lwip/include/lwip/acd.h create mode 100644 lib/lwip/include/lwip/altcp.h create mode 100644 lib/lwip/include/lwip/altcp_tcp.h create mode 100644 lib/lwip/include/lwip/altcp_tls.h create mode 100644 lib/lwip/include/lwip/api.h create mode 100644 lib/lwip/include/lwip/apps/FILES create mode 100644 lib/lwip/include/lwip/apps/altcp_proxyconnect.h create mode 100644 lib/lwip/include/lwip/apps/altcp_tls_mbedtls_opts.h create mode 100644 lib/lwip/include/lwip/apps/fs.h create mode 100644 lib/lwip/include/lwip/apps/http_client.h create mode 100644 lib/lwip/include/lwip/apps/httpd.h create mode 100644 lib/lwip/include/lwip/apps/httpd_opts.h create mode 100644 lib/lwip/include/lwip/apps/lwiperf.h create mode 100644 lib/lwip/include/lwip/apps/mdns.h create mode 100644 lib/lwip/include/lwip/apps/mdns_domain.h create mode 100644 lib/lwip/include/lwip/apps/mdns_opts.h create mode 100644 lib/lwip/include/lwip/apps/mdns_out.h create mode 100644 lib/lwip/include/lwip/apps/mdns_priv.h create mode 100644 lib/lwip/include/lwip/apps/mqtt.h create mode 100644 lib/lwip/include/lwip/apps/mqtt_opts.h create mode 100644 lib/lwip/include/lwip/apps/mqtt_priv.h create mode 100644 lib/lwip/include/lwip/apps/netbiosns.h create mode 100644 lib/lwip/include/lwip/apps/netbiosns_opts.h create mode 100644 lib/lwip/include/lwip/apps/smtp.h create mode 100644 lib/lwip/include/lwip/apps/smtp_opts.h create mode 100644 lib/lwip/include/lwip/apps/snmp.h create mode 100644 lib/lwip/include/lwip/apps/snmp_core.h create mode 100644 lib/lwip/include/lwip/apps/snmp_mib2.h create mode 100644 lib/lwip/include/lwip/apps/snmp_opts.h create mode 100644 lib/lwip/include/lwip/apps/snmp_scalar.h create mode 100644 lib/lwip/include/lwip/apps/snmp_snmpv2_framework.h create mode 100644 lib/lwip/include/lwip/apps/snmp_snmpv2_usm.h create mode 100644 lib/lwip/include/lwip/apps/snmp_table.h create mode 100644 lib/lwip/include/lwip/apps/snmp_threadsync.h create mode 100644 lib/lwip/include/lwip/apps/snmpv3.h create mode 100644 lib/lwip/include/lwip/apps/sntp.h create mode 100644 lib/lwip/include/lwip/apps/sntp_opts.h create mode 100644 lib/lwip/include/lwip/apps/tftp_client.h create mode 100644 lib/lwip/include/lwip/apps/tftp_common.h create mode 100644 lib/lwip/include/lwip/apps/tftp_opts.h create mode 100644 lib/lwip/include/lwip/apps/tftp_server.h create mode 100644 lib/lwip/include/lwip/arch.h create mode 100644 lib/lwip/include/lwip/autoip.h create mode 100644 lib/lwip/include/lwip/debug.h create mode 100644 lib/lwip/include/lwip/def.h create mode 100644 lib/lwip/include/lwip/dhcp.h create mode 100644 lib/lwip/include/lwip/dhcp6.h create mode 100644 lib/lwip/include/lwip/dns.h create mode 100644 lib/lwip/include/lwip/err.h create mode 100644 lib/lwip/include/lwip/errno.h create mode 100644 lib/lwip/include/lwip/etharp.h create mode 100644 lib/lwip/include/lwip/ethip6.h create mode 100644 lib/lwip/include/lwip/icmp.h create mode 100644 lib/lwip/include/lwip/icmp6.h create mode 100644 lib/lwip/include/lwip/if_api.h create mode 100644 lib/lwip/include/lwip/igmp.h create mode 100644 lib/lwip/include/lwip/inet.h create mode 100644 lib/lwip/include/lwip/inet_chksum.h create mode 100644 lib/lwip/include/lwip/init.h create mode 100644 lib/lwip/include/lwip/init.h.cmake.in create mode 100644 lib/lwip/include/lwip/ip.h create mode 100644 lib/lwip/include/lwip/ip4.h create mode 100644 lib/lwip/include/lwip/ip4_addr.h create mode 100644 lib/lwip/include/lwip/ip4_frag.h create mode 100644 lib/lwip/include/lwip/ip6.h create mode 100644 lib/lwip/include/lwip/ip6_addr.h create mode 100644 lib/lwip/include/lwip/ip6_frag.h create mode 100644 lib/lwip/include/lwip/ip6_zone.h create mode 100644 lib/lwip/include/lwip/ip_addr.h create mode 100644 lib/lwip/include/lwip/mem.h create mode 100644 lib/lwip/include/lwip/memp.h create mode 100644 lib/lwip/include/lwip/mld6.h create mode 100644 lib/lwip/include/lwip/nd6.h create mode 100644 lib/lwip/include/lwip/netbuf.h create mode 100644 lib/lwip/include/lwip/netdb.h create mode 100644 lib/lwip/include/lwip/netif.h create mode 100644 lib/lwip/include/lwip/netifapi.h create mode 100644 lib/lwip/include/lwip/opt.h create mode 100644 lib/lwip/include/lwip/pbuf.h create mode 100644 lib/lwip/include/lwip/priv/altcp_priv.h create mode 100644 lib/lwip/include/lwip/priv/api_msg.h create mode 100644 lib/lwip/include/lwip/priv/mem_priv.h create mode 100644 lib/lwip/include/lwip/priv/memp_priv.h create mode 100644 lib/lwip/include/lwip/priv/memp_std.h create mode 100644 lib/lwip/include/lwip/priv/nd6_priv.h create mode 100644 lib/lwip/include/lwip/priv/raw_priv.h create mode 100644 lib/lwip/include/lwip/priv/sockets_priv.h create mode 100644 lib/lwip/include/lwip/priv/tcp_priv.h create mode 100644 lib/lwip/include/lwip/priv/tcpip_priv.h create mode 100644 lib/lwip/include/lwip/prot/acd.h create mode 100644 lib/lwip/include/lwip/prot/autoip.h create mode 100644 lib/lwip/include/lwip/prot/dhcp.h create mode 100644 lib/lwip/include/lwip/prot/dhcp6.h create mode 100644 lib/lwip/include/lwip/prot/dns.h create mode 100644 lib/lwip/include/lwip/prot/etharp.h create mode 100644 lib/lwip/include/lwip/prot/ethernet.h create mode 100644 lib/lwip/include/lwip/prot/iana.h create mode 100644 lib/lwip/include/lwip/prot/icmp.h create mode 100644 lib/lwip/include/lwip/prot/icmp6.h create mode 100644 lib/lwip/include/lwip/prot/ieee.h create mode 100644 lib/lwip/include/lwip/prot/igmp.h create mode 100644 lib/lwip/include/lwip/prot/ip.h create mode 100644 lib/lwip/include/lwip/prot/ip4.h create mode 100644 lib/lwip/include/lwip/prot/ip6.h create mode 100644 lib/lwip/include/lwip/prot/mld6.h create mode 100644 lib/lwip/include/lwip/prot/nd6.h create mode 100644 lib/lwip/include/lwip/prot/tcp.h create mode 100644 lib/lwip/include/lwip/prot/udp.h create mode 100644 lib/lwip/include/lwip/raw.h create mode 100644 lib/lwip/include/lwip/sio.h create mode 100644 lib/lwip/include/lwip/snmp.h create mode 100644 lib/lwip/include/lwip/sockets.h create mode 100644 lib/lwip/include/lwip/stats.h create mode 100644 lib/lwip/include/lwip/sys.h create mode 100644 lib/lwip/include/lwip/tcp.h create mode 100644 lib/lwip/include/lwip/tcpbase.h create mode 100644 lib/lwip/include/lwip/tcpip.h create mode 100644 lib/lwip/include/lwip/timeouts.h create mode 100644 lib/lwip/include/lwip/udp.h create mode 100644 lib/lwip/include/netif/bridgeif.h create mode 100644 lib/lwip/include/netif/bridgeif_opts.h create mode 100644 lib/lwip/include/netif/etharp.h create mode 100644 lib/lwip/include/netif/ethernet.h create mode 100644 lib/lwip/include/netif/ieee802154.h create mode 100644 lib/lwip/include/netif/lowpan6.h create mode 100644 lib/lwip/include/netif/lowpan6_ble.h create mode 100644 lib/lwip/include/netif/lowpan6_common.h create mode 100644 lib/lwip/include/netif/lowpan6_opts.h create mode 100644 lib/lwip/include/netif/ppp/ccp.h create mode 100644 lib/lwip/include/netif/ppp/chap-md5.h create mode 100644 lib/lwip/include/netif/ppp/chap-new.h create mode 100644 lib/lwip/include/netif/ppp/chap_ms.h create mode 100644 lib/lwip/include/netif/ppp/eap.h create mode 100644 lib/lwip/include/netif/ppp/ecp.h create mode 100644 lib/lwip/include/netif/ppp/eui64.h create mode 100644 lib/lwip/include/netif/ppp/fsm.h create mode 100644 lib/lwip/include/netif/ppp/ipcp.h create mode 100644 lib/lwip/include/netif/ppp/ipv6cp.h create mode 100644 lib/lwip/include/netif/ppp/lcp.h create mode 100644 lib/lwip/include/netif/ppp/magic.h create mode 100644 lib/lwip/include/netif/ppp/mppe.h create mode 100644 lib/lwip/include/netif/ppp/polarssl/arc4.h create mode 100644 lib/lwip/include/netif/ppp/polarssl/des.h create mode 100644 lib/lwip/include/netif/ppp/polarssl/md4.h create mode 100644 lib/lwip/include/netif/ppp/polarssl/md5.h create mode 100644 lib/lwip/include/netif/ppp/polarssl/sha1.h create mode 100644 lib/lwip/include/netif/ppp/ppp.h create mode 100644 lib/lwip/include/netif/ppp/ppp_impl.h create mode 100644 lib/lwip/include/netif/ppp/ppp_opts.h create mode 100644 lib/lwip/include/netif/ppp/pppapi.h create mode 100644 lib/lwip/include/netif/ppp/pppcrypt.h create mode 100644 lib/lwip/include/netif/ppp/pppdebug.h create mode 100644 lib/lwip/include/netif/ppp/pppoe.h create mode 100644 lib/lwip/include/netif/ppp/pppol2tp.h create mode 100644 lib/lwip/include/netif/ppp/pppos.h create mode 100644 lib/lwip/include/netif/ppp/upap.h create mode 100644 lib/lwip/include/netif/ppp/vj.h create mode 100644 lib/lwip/include/netif/slipif.h create mode 100644 lib/lwip/include/netif/zepif.h create mode 100644 lib/lwip/netif/ethernet.c create mode 100644 lib/lwip/u-boot/arch/cc.h create mode 100644 lib/lwip/u-boot/arch/sys_arch.h create mode 100644 lib/lwip/u-boot/limits.h create mode 100644 lib/lwip/u-boot/lwipopts.h

diff --git a/lib/Makefile b/lib/Makefile index 2a76acf100..c35786a057 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -94,6 +94,8 @@ obj-$(CONFIG_LIBAVB) += libavb/ obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += libfdt/ obj-$(CONFIG_$(SPL_TPL_)OF_REAL) += fdtdec_common.o fdtdec.o

+obj-$(CONFIG_NET_LWIP) += lwip/ + ifdef CONFIG_SPL_BUILD obj-$(CONFIG_SPL_YMODEM_SUPPORT) += crc16-ccitt.o obj-$(CONFIG_$(SPL_TPL_)HASH) += crc16-ccitt.o diff --git a/lib/lwip/Makefile b/lib/lwip/Makefile new file mode 100644 index 0000000000..6022973f74 --- /dev/null +++ b/lib/lwip/Makefile @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2024 Linaro Ltd. + +ccflags-y += -I$(srctree)/lib/lwip/include -I$(srctree)/lib/lwip/u-boot + +obj-y += \ + api/api_lib.o \ + api/api_msg.o \ + api/err.o \ + api/if_api.o \ + api/netbuf.o \ + api/netdb.o \ + api/netifapi.o \ + api/sockets.o \ + api/tcpip.o \ + apps/http/http_client.o \ + apps/tftp/tftp.o \ + core/altcp_alloc.o \ + core/altcp.o \ + core/altcp_tcp.o \ + core/def.o \ + core/dns.o \ + core/inet_chksum.o \ + core/init.o \ + core/ip.o \ + core/ipv4/acd.o \ + core/ipv4/autoip.o \ + core/ipv4/dhcp.o \ + core/ipv4/etharp.o \ + core/ipv4/icmp.o \ + core/ipv4/igmp.o \ + core/ipv4/ip4_addr.o \ + core/ipv4/ip4.o \ + core/ipv4/ip4_frag.o \ + core/ipv6/dhcp6.o \ + core/ipv6/ethip6.o \ + core/ipv6/icmp6.o \ + core/ipv6/inet6.o \ + core/ipv6/ip6_addr.o \ + core/ipv6/ip6.o \ + core/ipv6/ip6_frag.o \ + core/ipv6/mld6.o \ + core/ipv6/nd6.o \ + core/mem.o \ + core/memp.o \ + core/netif.o \ + core/pbuf.o \ + core/raw.o \ + core/stats.o \ + core/sys.o \ + core/tcp.o \ + core/tcp_in.o \ + core/tcp_out.o \ + core/timeouts.o \ + core/udp.o \ + netif/ethernet.o diff --git a/lib/lwip/README b/lib/lwip/README new file mode 100644 index 0000000000..fa1795c9a8 --- /dev/null +++ b/lib/lwip/README @@ -0,0 +1,6 @@ +Lightweight IP (lwIP) library + +The source code in this directory was imported from: +http://git.savannah.gnu.org/cgit/lwip.git + +Please see the commit description for details. diff --git a/lib/lwip/api/api_lib.c b/lib/lwip/api/api_lib.c new file mode 100644 index 0000000000..60678f88e2 --- /dev/null +++ b/lib/lwip/api/api_lib.c @@ -0,0 +1,1367 @@ +/** + * @file + * Sequential API External module + * + * @defgroup netconn Netconn API + * @ingroup sequential_api + * Thread-safe, to be called from non-TCPIP threads only. + * TX/RX handling based on @ref netbuf (containing @ref pbuf) + * to avoid copying data around. + * + * @defgroup netconn_common Common functions + * @ingroup netconn + * For use with TCP and UDP + * + * @defgroup netconn_tcp TCP only + * @ingroup netconn + * TCP only functions + * + * @defgroup netconn_udp UDP only + * @ingroup netconn + * UDP only functions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + */ + +/* This is the part of the API that is linked with + the application */ + +#include "lwip/opt.h" + +#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/api.h" +#include "lwip/memp.h" + +#include "lwip/ip.h" +#include "lwip/raw.h" +#include "lwip/udp.h" +#include "lwip/priv/api_msg.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/priv/tcpip_priv.h" + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +#include <string.h> + +#define API_MSG_VAR_REF(name) API_VAR_REF(name) +#define API_MSG_VAR_DECLARE(name) API_VAR_DECLARE(struct api_msg, name) +#define API_MSG_VAR_ALLOC(name) API_VAR_ALLOC(struct api_msg, MEMP_API_MSG, name, ERR_MEM) +#define API_MSG_VAR_ALLOC_RETURN_NULL(name) API_VAR_ALLOC(struct api_msg, MEMP_API_MSG, name, NULL) +#define API_MSG_VAR_FREE(name) API_VAR_FREE(MEMP_API_MSG, name) + +#if TCP_LISTEN_BACKLOG +/* need to allocate API message for accept so empty message pool does not result in event loss + * see bug #47512: MPU_COMPATIBLE may fail on empty pool */ +#define API_MSG_VAR_ALLOC_ACCEPT(msg) API_MSG_VAR_ALLOC(msg) +#define API_MSG_VAR_FREE_ACCEPT(msg) API_MSG_VAR_FREE(msg) +#else /* TCP_LISTEN_BACKLOG */ +#define API_MSG_VAR_ALLOC_ACCEPT(msg) +#define API_MSG_VAR_FREE_ACCEPT(msg) +#endif /* TCP_LISTEN_BACKLOG */ + +#if LWIP_NETCONN_FULLDUPLEX +#define NETCONN_RECVMBOX_WAITABLE(conn) (sys_mbox_valid(&(conn)->recvmbox) && (((conn)->flags & NETCONN_FLAG_MBOXINVALID) == 0)) +#define NETCONN_ACCEPTMBOX_WAITABLE(conn) (sys_mbox_valid(&(conn)->acceptmbox) && (((conn)->flags & (NETCONN_FLAG_MBOXCLOSED|NETCONN_FLAG_MBOXINVALID)) == 0)) +#define NETCONN_MBOX_WAITING_INC(conn) SYS_ARCH_INC(conn->mbox_threads_waiting, 1) +#define NETCONN_MBOX_WAITING_DEC(conn) SYS_ARCH_DEC(conn->mbox_threads_waiting, 1) +#else /* LWIP_NETCONN_FULLDUPLEX */ +#define NETCONN_RECVMBOX_WAITABLE(conn) sys_mbox_valid(&(conn)->recvmbox) +#define NETCONN_ACCEPTMBOX_WAITABLE(conn) (sys_mbox_valid(&(conn)->acceptmbox) && (((conn)->flags & NETCONN_FLAG_MBOXCLOSED) == 0)) +#define NETCONN_MBOX_WAITING_INC(conn) +#define NETCONN_MBOX_WAITING_DEC(conn) +#endif /* LWIP_NETCONN_FULLDUPLEX */ + +static err_t netconn_close_shutdown(struct netconn *conn, u8_t how); + +/** + * Call the lower part of a netconn_* function + * This function is then running in the thread context + * of tcpip_thread and has exclusive access to lwIP core code. + * + * @param fn function to call + * @param apimsg a struct containing the function to call and its parameters + * @return ERR_OK if the function was called, another err_t if not + */ +static err_t +netconn_apimsg(tcpip_callback_fn fn, struct api_msg *apimsg) +{ + err_t err; + +#ifdef LWIP_DEBUG + /* catch functions that don't set err */ + apimsg->err = ERR_VAL; +#endif /* LWIP_DEBUG */ + +#if LWIP_NETCONN_SEM_PER_THREAD + apimsg->op_completed_sem = LWIP_NETCONN_THREAD_SEM_GET(); +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + err = tcpip_send_msg_wait_sem(fn, apimsg, LWIP_API_MSG_SEM(apimsg)); + if (err == ERR_OK) { + return apimsg->err; + } + return err; +} + +/** + * Create a new netconn (of a specific type) that has a callback function. + * The corresponding pcb is also created. + * + * @param t the type of 'connection' to create (@see enum netconn_type) + * @param proto the IP protocol for RAW IP pcbs + * @param callback a function to call on status changes (RX available, TX'ed) + * @return a newly allocated struct netconn or + * NULL on memory error + */ +struct netconn * +netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto, netconn_callback callback) +{ + struct netconn *conn; + API_MSG_VAR_DECLARE(msg); + API_MSG_VAR_ALLOC_RETURN_NULL(msg); + + conn = netconn_alloc(t, callback); + if (conn != NULL) { + err_t err; + + API_MSG_VAR_REF(msg).msg.n.proto = proto; + API_MSG_VAR_REF(msg).conn = conn; + err = netconn_apimsg(lwip_netconn_do_newconn, &API_MSG_VAR_REF(msg)); + if (err != ERR_OK) { + LWIP_ASSERT("freeing conn without freeing pcb", conn->pcb.tcp == NULL); + LWIP_ASSERT("conn has no recvmbox", sys_mbox_valid(&conn->recvmbox)); +#if LWIP_TCP + LWIP_ASSERT("conn->acceptmbox shouldn't exist", !sys_mbox_valid(&conn->acceptmbox)); +#endif /* LWIP_TCP */ +#if !LWIP_NETCONN_SEM_PER_THREAD + LWIP_ASSERT("conn has no op_completed", sys_sem_valid(&conn->op_completed)); + sys_sem_free(&conn->op_completed); +#endif /* !LWIP_NETCONN_SEM_PER_THREAD */ + sys_mbox_free(&conn->recvmbox); + memp_free(MEMP_NETCONN, conn); + API_MSG_VAR_FREE(msg); + return NULL; + } + } + API_MSG_VAR_FREE(msg); + return conn; +} + +/** + * @ingroup netconn_common + * Close a netconn 'connection' and free all its resources but not the netconn itself. + * UDP and RAW connection are completely closed, TCP pcbs might still be in a waitstate + * after this returns. + * + * @param conn the netconn to delete + * @return ERR_OK if the connection was deleted + */ +err_t +netconn_prepare_delete(struct netconn *conn) +{ + err_t err; + API_MSG_VAR_DECLARE(msg); + + /* No ASSERT here because possible to get a (conn == NULL) if we got an accept error */ + if (conn == NULL) { + return ERR_OK; + } + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; +#if LWIP_TCP +#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER + /* get the time we started, which is later compared to + sys_now() + conn->send_timeout */ + API_MSG_VAR_REF(msg).msg.sd.time_started = sys_now(); +#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + API_MSG_VAR_REF(msg).msg.sd.polls_left = + ((LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT + TCP_SLOW_INTERVAL - 1) / TCP_SLOW_INTERVAL) + 1; +#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ +#endif /* LWIP_TCP */ + err = netconn_apimsg(lwip_netconn_do_delconn, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + if (err != ERR_OK) { + return err; + } + return ERR_OK; +} + +/** + * @ingroup netconn_common + * Close a netconn 'connection' and free its resources. + * UDP and RAW connection are completely closed, TCP pcbs might still be in a waitstate + * after this returns. + * + * @param conn the netconn to delete + * @return ERR_OK if the connection was deleted + */ +err_t +netconn_delete(struct netconn *conn) +{ + err_t err; + + /* No ASSERT here because possible to get a (conn == NULL) if we got an accept error */ + if (conn == NULL) { + return ERR_OK; + } + +#if LWIP_NETCONN_FULLDUPLEX + if (conn->flags & NETCONN_FLAG_MBOXINVALID) { + /* Already called netconn_prepare_delete() before */ + err = ERR_OK; + } else +#endif /* LWIP_NETCONN_FULLDUPLEX */ + { + err = netconn_prepare_delete(conn); + } + if (err == ERR_OK) { + netconn_free(conn); + } + return err; +} + +/** + * Get the local or remote IP address and port of a netconn. + * For RAW netconns, this returns the protocol instead of a port! + * + * @param conn the netconn to query + * @param addr a pointer to which to save the IP address + * @param port a pointer to which to save the port (or protocol for RAW) + * @param local 1 to get the local IP address, 0 to get the remote one + * @return ERR_CONN for invalid connections + * ERR_OK if the information was retrieved + */ +err_t +netconn_getaddr(struct netconn *conn, ip_addr_t *addr, u16_t *port, u8_t local) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_getaddr: invalid conn", (conn != NULL), return ERR_ARG;); + LWIP_ERROR("netconn_getaddr: invalid addr", (addr != NULL), return ERR_ARG;); + LWIP_ERROR("netconn_getaddr: invalid port", (port != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.ad.local = local; +#if LWIP_MPU_COMPATIBLE + err = netconn_apimsg(lwip_netconn_do_getaddr, &API_MSG_VAR_REF(msg)); + *addr = msg->msg.ad.ipaddr; + *port = msg->msg.ad.port; +#else /* LWIP_MPU_COMPATIBLE */ + msg.msg.ad.ipaddr = addr; + msg.msg.ad.port = port; + err = netconn_apimsg(lwip_netconn_do_getaddr, &msg); +#endif /* LWIP_MPU_COMPATIBLE */ + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_common + * Bind a netconn to a specific local IP address and port. + * Binding one netconn twice might not always be checked correctly! + * + * @param conn the netconn to bind + * @param addr the local IP address to bind the netconn to + * (use IP4_ADDR_ANY/IP6_ADDR_ANY to bind to all addresses) + * @param port the local port to bind the netconn to (not used for RAW) + * @return ERR_OK if bound, any other err_t on failure + */ +err_t +netconn_bind(struct netconn *conn, const ip_addr_t *addr, u16_t port) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_bind: invalid conn", (conn != NULL), return ERR_ARG;); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IP_ADDR_ANY alias) to subsequent functions */ + if (addr == NULL) { + addr = IP4_ADDR_ANY; + } +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV4 && LWIP_IPV6 + /* "Socket API like" dual-stack support: If IP to bind to is IP6_ADDR_ANY, + * and NETCONN_FLAG_IPV6_V6ONLY is 0, use IP_ANY_TYPE to bind + */ + if ((netconn_get_ipv6only(conn) == 0) && + ip_addr_eq(addr, IP6_ADDR_ANY)) { + addr = IP_ANY_TYPE; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.bc.ipaddr = API_MSG_VAR_REF(addr); + API_MSG_VAR_REF(msg).msg.bc.port = port; + err = netconn_apimsg(lwip_netconn_do_bind, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_common + * Bind a netconn to a specific interface and port. + * Binding one netconn twice might not always be checked correctly! + * + * @param conn the netconn to bind + * @param if_idx the local interface index to bind the netconn to + * @return ERR_OK if bound, any other err_t on failure + */ +err_t +netconn_bind_if(struct netconn *conn, u8_t if_idx) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_bind_if: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.bc.if_idx = if_idx; + err = netconn_apimsg(lwip_netconn_do_bind_if, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_common + * Connect a netconn to a specific remote IP address and port. + * + * @param conn the netconn to connect + * @param addr the remote IP address to connect to + * @param port the remote port to connect to (no used for RAW) + * @return ERR_OK if connected, return value of tcp_/udp_/raw_connect otherwise + */ +err_t +netconn_connect(struct netconn *conn, const ip_addr_t *addr, u16_t port) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_connect: invalid conn", (conn != NULL), return ERR_ARG;); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IP_ADDR_ANY alias) to subsequent functions */ + if (addr == NULL) { + addr = IP4_ADDR_ANY; + } +#endif /* LWIP_IPV4 */ + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.bc.ipaddr = API_MSG_VAR_REF(addr); + API_MSG_VAR_REF(msg).msg.bc.port = port; + err = netconn_apimsg(lwip_netconn_do_connect, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_udp + * Disconnect a netconn from its current peer (only valid for UDP netconns). + * + * @param conn the netconn to disconnect + * @return See @ref err_t + */ +err_t +netconn_disconnect(struct netconn *conn) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_disconnect: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + err = netconn_apimsg(lwip_netconn_do_disconnect, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_tcp + * Set a TCP netconn into listen mode + * + * @param conn the tcp netconn to set to listen mode + * @param backlog the listen backlog, only used if TCP_LISTEN_BACKLOG==1 + * @return ERR_OK if the netconn was set to listen (UDP and RAW netconns + * don't return any error (yet?)) + */ +err_t +netconn_listen_with_backlog(struct netconn *conn, u8_t backlog) +{ +#if LWIP_TCP + API_MSG_VAR_DECLARE(msg); + err_t err; + + /* This does no harm. If TCP_LISTEN_BACKLOG is off, backlog is unused. */ + LWIP_UNUSED_ARG(backlog); + + LWIP_ERROR("netconn_listen: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; +#if TCP_LISTEN_BACKLOG + API_MSG_VAR_REF(msg).msg.lb.backlog = backlog; +#endif /* TCP_LISTEN_BACKLOG */ + err = netconn_apimsg(lwip_netconn_do_listen, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +#else /* LWIP_TCP */ + LWIP_UNUSED_ARG(conn); + LWIP_UNUSED_ARG(backlog); + return ERR_ARG; +#endif /* LWIP_TCP */ +} + +/** + * @ingroup netconn_tcp + * Accept a new connection on a TCP listening netconn. + * + * @param conn the TCP listen netconn + * @param new_conn pointer where the new connection is stored + * @return ERR_OK if a new connection has been received or an error + * code otherwise + */ +err_t +netconn_accept(struct netconn *conn, struct netconn **new_conn) +{ +#if LWIP_TCP + err_t err; + void *accept_ptr; + struct netconn *newconn; +#if TCP_LISTEN_BACKLOG + API_MSG_VAR_DECLARE(msg); +#endif /* TCP_LISTEN_BACKLOG */ + + LWIP_ERROR("netconn_accept: invalid pointer", (new_conn != NULL), return ERR_ARG;); + *new_conn = NULL; + LWIP_ERROR("netconn_accept: invalid conn", (conn != NULL), return ERR_ARG;); + + /* NOTE: Although the opengroup spec says a pending error shall be returned to + send/recv/getsockopt(SO_ERROR) only, we return it for listening + connections also, to handle embedded-system errors */ + err = netconn_err(conn); + if (err != ERR_OK) { + /* return pending error */ + return err; + } + if (!NETCONN_ACCEPTMBOX_WAITABLE(conn)) { + /* don't accept if closed: this might block the application task + waiting on acceptmbox forever! */ + return ERR_CLSD; + } + + API_MSG_VAR_ALLOC_ACCEPT(msg); + + NETCONN_MBOX_WAITING_INC(conn); + if (netconn_is_nonblocking(conn)) { + if (sys_arch_mbox_tryfetch(&conn->acceptmbox, &accept_ptr) == SYS_MBOX_EMPTY) { + API_MSG_VAR_FREE_ACCEPT(msg); + NETCONN_MBOX_WAITING_DEC(conn); + return ERR_WOULDBLOCK; + } + } else { +#if LWIP_SO_RCVTIMEO + if (sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, conn->recv_timeout) == SYS_ARCH_TIMEOUT) { + API_MSG_VAR_FREE_ACCEPT(msg); + NETCONN_MBOX_WAITING_DEC(conn); + return ERR_TIMEOUT; + } +#else + sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, 0); +#endif /* LWIP_SO_RCVTIMEO*/ + } + NETCONN_MBOX_WAITING_DEC(conn); +#if LWIP_NETCONN_FULLDUPLEX + if (conn->flags & NETCONN_FLAG_MBOXINVALID) { + if (lwip_netconn_is_deallocated_msg(accept_ptr)) { + /* the netconn has been closed from another thread */ + API_MSG_VAR_FREE_ACCEPT(msg); + return ERR_CONN; + } + } +#endif + + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0); + + if (lwip_netconn_is_err_msg(accept_ptr, &err)) { + /* a connection has been aborted: e.g. out of pcbs or out of netconns during accept */ + API_MSG_VAR_FREE_ACCEPT(msg); + return err; + } + if (accept_ptr == NULL) { + /* connection has been aborted */ + API_MSG_VAR_FREE_ACCEPT(msg); + return ERR_CLSD; + } + newconn = (struct netconn *)accept_ptr; +#if TCP_LISTEN_BACKLOG + /* Let the stack know that we have accepted the connection. */ + API_MSG_VAR_REF(msg).conn = newconn; + /* don't care for the return value of lwip_netconn_do_recv */ + netconn_apimsg(lwip_netconn_do_accepted, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); +#endif /* TCP_LISTEN_BACKLOG */ + + *new_conn = newconn; + /* don't set conn->last_err: it's only ERR_OK, anyway */ + return ERR_OK; +#else /* LWIP_TCP */ + LWIP_UNUSED_ARG(conn); + LWIP_UNUSED_ARG(new_conn); + return ERR_ARG; +#endif /* LWIP_TCP */ +} + +/** + * @ingroup netconn_common + * Receive data: actual implementation that doesn't care whether pbuf or netbuf + * is received (this is internal, it's just here for describing common errors) + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new pbuf/netbuf is stored when received data + * @param apiflags flags that control function behaviour. For now only: + * - NETCONN_DONTBLOCK: only read data that is available now, don't wait for more data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error) + * ERR_CONN if not connected + * ERR_CLSD if TCP connection has been closed + * ERR_WOULDBLOCK if the netconn is nonblocking but would block to wait for data + * ERR_TIMEOUT if the netconn has a receive timeout and no data was received + */ +static err_t +netconn_recv_data(struct netconn *conn, void **new_buf, u8_t apiflags) +{ + void *buf = NULL; + u16_t len; + + LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;); + *new_buf = NULL; + LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;); + + if (!NETCONN_RECVMBOX_WAITABLE(conn)) { + err_t err = netconn_err(conn); + if (err != ERR_OK) { + /* return pending error */ + return err; + } + return ERR_CONN; + } + + NETCONN_MBOX_WAITING_INC(conn); + if (netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK) || + (conn->flags & NETCONN_FLAG_MBOXCLOSED) || (conn->pending_err != ERR_OK)) { + if (sys_arch_mbox_tryfetch(&conn->recvmbox, &buf) == SYS_MBOX_EMPTY) { + err_t err; + NETCONN_MBOX_WAITING_DEC(conn); + err = netconn_err(conn); + if (err != ERR_OK) { + /* return pending error */ + return err; + } + if (conn->flags & NETCONN_FLAG_MBOXCLOSED) { + return ERR_CONN; + } + return ERR_WOULDBLOCK; + } + } else { +#if LWIP_SO_RCVTIMEO + if (sys_arch_mbox_fetch(&conn->recvmbox, &buf, conn->recv_timeout) == SYS_ARCH_TIMEOUT) { + NETCONN_MBOX_WAITING_DEC(conn); + return ERR_TIMEOUT; + } +#else + sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0); +#endif /* LWIP_SO_RCVTIMEO*/ + } + NETCONN_MBOX_WAITING_DEC(conn); +#if LWIP_NETCONN_FULLDUPLEX + if (conn->flags & NETCONN_FLAG_MBOXINVALID) { + if (lwip_netconn_is_deallocated_msg(buf)) { + /* the netconn has been closed from another thread */ + API_MSG_VAR_FREE_ACCEPT(msg); + return ERR_CONN; + } + } +#endif + +#if LWIP_TCP +#if (LWIP_UDP || LWIP_RAW) + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) +#endif /* (LWIP_UDP || LWIP_RAW) */ + { + err_t err; + /* Check if this is an error message or a pbuf */ + if (lwip_netconn_is_err_msg(buf, &err)) { + /* new_buf has been zeroed above already */ + if (err == ERR_CLSD) { + /* connection closed translates to ERR_OK with *new_buf == NULL */ + return ERR_OK; + } + return err; + } + len = ((struct pbuf *)buf)->tot_len; + } +#endif /* LWIP_TCP */ +#if LWIP_TCP && (LWIP_UDP || LWIP_RAW) + else +#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */ +#if (LWIP_UDP || LWIP_RAW) + { + LWIP_ASSERT("buf != NULL", buf != NULL); + len = netbuf_len((struct netbuf *)buf); + } +#endif /* (LWIP_UDP || LWIP_RAW) */ + +#if LWIP_SO_RCVBUF + SYS_ARCH_DEC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVMINUS, len); + + LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv_data: received %p, len=%"U16_F"\n", buf, len)); + + *new_buf = buf; + /* don't set conn->last_err: it's only ERR_OK, anyway */ + return ERR_OK; +} + +#if LWIP_TCP +static err_t +netconn_tcp_recvd_msg(struct netconn *conn, size_t len, struct api_msg *msg) +{ + LWIP_ERROR("netconn_recv_tcp_pbuf: invalid conn", (conn != NULL) && + NETCONNTYPE_GROUP(netconn_type(conn)) == NETCONN_TCP, return ERR_ARG;); + + msg->conn = conn; + msg->msg.r.len = len; + + return netconn_apimsg(lwip_netconn_do_recv, msg); +} + +err_t +netconn_tcp_recvd(struct netconn *conn, size_t len) +{ + err_t err; + API_MSG_VAR_DECLARE(msg); + LWIP_ERROR("netconn_recv_tcp_pbuf: invalid conn", (conn != NULL) && + NETCONNTYPE_GROUP(netconn_type(conn)) == NETCONN_TCP, return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + err = netconn_tcp_recvd_msg(conn, len, &API_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + return err; +} + +static err_t +netconn_recv_data_tcp(struct netconn *conn, struct pbuf **new_buf, u8_t apiflags) +{ + err_t err; + struct pbuf *buf; + API_MSG_VAR_DECLARE(msg); +#if LWIP_MPU_COMPATIBLE + msg = NULL; +#endif + + if (!NETCONN_RECVMBOX_WAITABLE(conn)) { + /* This only happens when calling this function more than once *after* receiving FIN */ + return ERR_CONN; + } + if (netconn_is_flag_set(conn, NETCONN_FIN_RX_PENDING)) { + netconn_clear_flags(conn, NETCONN_FIN_RX_PENDING); + goto handle_fin; + } + + if (!(apiflags & NETCONN_NOAUTORCVD)) { + /* need to allocate API message here so empty message pool does not result in event loss + * see bug #47512: MPU_COMPATIBLE may fail on empty pool */ + API_MSG_VAR_ALLOC(msg); + } + + err = netconn_recv_data(conn, (void **)new_buf, apiflags); + if (err != ERR_OK) { + if (!(apiflags & NETCONN_NOAUTORCVD)) { + API_MSG_VAR_FREE(msg); + } + return err; + } + buf = *new_buf; + if (!(apiflags & NETCONN_NOAUTORCVD)) { + /* Let the stack know that we have taken the data. */ + u16_t len = buf ? buf->tot_len : 1; + /* don't care for the return value of lwip_netconn_do_recv */ + /* @todo: this should really be fixed, e.g. by retrying in poll on error */ + netconn_tcp_recvd_msg(conn, len, &API_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + } + + /* If we are closed, we indicate that we no longer wish to use the socket */ + if (buf == NULL) { + if (apiflags & NETCONN_NOFIN) { + /* received a FIN but the caller cannot handle it right now: + re-enqueue it and return "no data" */ + netconn_set_flags(conn, NETCONN_FIN_RX_PENDING); + return ERR_WOULDBLOCK; + } else { +handle_fin: + API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0); + if (conn->pcb.ip == NULL) { + /* race condition: RST during recv */ + err = netconn_err(conn); + if (err != ERR_OK) { + return err; + } + return ERR_RST; + } + /* RX side is closed, so deallocate the recvmbox */ + netconn_close_shutdown(conn, NETCONN_SHUT_RD); + /* Don' store ERR_CLSD as conn->err since we are only half-closed */ + return ERR_CLSD; + } + } + return err; +} + +/** + * @ingroup netconn_tcp + * Receive data (in form of a pbuf) from a TCP netconn + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new pbuf is stored when received data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error, @see netconn_recv_data) + * ERR_ARG if conn is not a TCP netconn + */ +err_t +netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf) +{ + LWIP_ERROR("netconn_recv_tcp_pbuf: invalid conn", (conn != NULL) && + NETCONNTYPE_GROUP(netconn_type(conn)) == NETCONN_TCP, return ERR_ARG;); + + return netconn_recv_data_tcp(conn, new_buf, 0); +} + +/** + * @ingroup netconn_tcp + * Receive data (in form of a pbuf) from a TCP netconn + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new pbuf is stored when received data + * @param apiflags flags that control function behaviour. For now only: + * - NETCONN_DONTBLOCK: only read data that is available now, don't wait for more data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error, @see netconn_recv_data) + * ERR_ARG if conn is not a TCP netconn + */ +err_t +netconn_recv_tcp_pbuf_flags(struct netconn *conn, struct pbuf **new_buf, u8_t apiflags) +{ + LWIP_ERROR("netconn_recv_tcp_pbuf: invalid conn", (conn != NULL) && + NETCONNTYPE_GROUP(netconn_type(conn)) == NETCONN_TCP, return ERR_ARG;); + + return netconn_recv_data_tcp(conn, new_buf, apiflags); +} +#endif /* LWIP_TCP */ + +/** + * Receive data (in form of a netbuf) from a UDP or RAW netconn + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new netbuf is stored when received data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error) + * ERR_ARG if conn is not a UDP/RAW netconn + */ +err_t +netconn_recv_udp_raw_netbuf(struct netconn *conn, struct netbuf **new_buf) +{ + LWIP_ERROR("netconn_recv_udp_raw_netbuf: invalid conn", (conn != NULL) && + NETCONNTYPE_GROUP(netconn_type(conn)) != NETCONN_TCP, return ERR_ARG;); + + return netconn_recv_data(conn, (void **)new_buf, 0); +} + +/** + * Receive data (in form of a netbuf) from a UDP or RAW netconn + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new netbuf is stored when received data + * @param apiflags flags that control function behaviour. For now only: + * - NETCONN_DONTBLOCK: only read data that is available now, don't wait for more data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error) + * ERR_ARG if conn is not a UDP/RAW netconn + */ +err_t +netconn_recv_udp_raw_netbuf_flags(struct netconn *conn, struct netbuf **new_buf, u8_t apiflags) +{ + LWIP_ERROR("netconn_recv_udp_raw_netbuf: invalid conn", (conn != NULL) && + NETCONNTYPE_GROUP(netconn_type(conn)) != NETCONN_TCP, return ERR_ARG;); + + return netconn_recv_data(conn, (void **)new_buf, apiflags); +} + +/** + * @ingroup netconn_common + * Receive data (in form of a netbuf containing a packet buffer) from a netconn + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new netbuf is stored when received data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error) + */ +err_t +netconn_recv(struct netconn *conn, struct netbuf **new_buf) +{ +#if LWIP_TCP + struct netbuf *buf = NULL; + err_t err; +#endif /* LWIP_TCP */ + + LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;); + *new_buf = NULL; + LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;); + +#if LWIP_TCP +#if (LWIP_UDP || LWIP_RAW) + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) +#endif /* (LWIP_UDP || LWIP_RAW) */ + { + struct pbuf *p = NULL; + /* This is not a listening netconn, since recvmbox is set */ + + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + return ERR_MEM; + } + + err = netconn_recv_data_tcp(conn, &p, 0); + if (err != ERR_OK) { + memp_free(MEMP_NETBUF, buf); + return err; + } + LWIP_ASSERT("p != NULL", p != NULL); + + buf->p = p; + buf->ptr = p; + buf->port = 0; + ip_addr_set_zero(&buf->addr); + *new_buf = buf; + /* don't set conn->last_err: it's only ERR_OK, anyway */ + return ERR_OK; + } +#endif /* LWIP_TCP */ +#if LWIP_TCP && (LWIP_UDP || LWIP_RAW) + else +#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */ + { +#if (LWIP_UDP || LWIP_RAW) + return netconn_recv_data(conn, (void **)new_buf, 0); +#endif /* (LWIP_UDP || LWIP_RAW) */ + } +} + +/** + * @ingroup netconn_udp + * Send data (in form of a netbuf) to a specific remote IP address and port. + * Only to be used for UDP and RAW netconns (not TCP). + * + * @param conn the netconn over which to send data + * @param buf a netbuf containing the data to send + * @param addr the remote IP address to which to send the data + * @param port the remote port to which to send the data + * @return ERR_OK if data was sent, any other err_t on error + */ +err_t +netconn_sendto(struct netconn *conn, struct netbuf *buf, const ip_addr_t *addr, u16_t port) +{ + if (buf != NULL) { + ip_addr_set(&buf->addr, addr); + buf->port = port; + return netconn_send(conn, buf); + } + return ERR_VAL; +} + +/** + * @ingroup netconn_udp + * Send data over a UDP or RAW netconn (that is already connected). + * + * @param conn the UDP or RAW netconn over which to send data + * @param buf a netbuf containing the data to send + * @return ERR_OK if data was sent, any other err_t on error + */ +err_t +netconn_send(struct netconn *conn, struct netbuf *buf) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_send: invalid conn", (conn != NULL), return ERR_ARG;); + + LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_send: sending %"U16_F" bytes\n", buf->p->tot_len)); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.b = buf; + err = netconn_apimsg(lwip_netconn_do_send, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_tcp + * Send data over a TCP netconn. + * + * @param conn the TCP netconn over which to send data + * @param dataptr pointer to the application buffer that contains the data to send + * @param size size of the application data to send + * @param apiflags combination of following flags : + * - NETCONN_COPY: data will be copied into memory belonging to the stack + * - NETCONN_MORE: for TCP connection, PSH flag will be set on last segment sent + * - NETCONN_DONTBLOCK: only write the data if all data can be written at once + * @param bytes_written pointer to a location that receives the number of written bytes + * @return ERR_OK if data was sent, any other err_t on error + */ +err_t +netconn_write_partly(struct netconn *conn, const void *dataptr, size_t size, + u8_t apiflags, size_t *bytes_written) +{ + struct netvector vector; + vector.ptr = dataptr; + vector.len = size; + return netconn_write_vectors_partly(conn, &vector, 1, apiflags, bytes_written); +} + +/** + * Send vectorized data atomically over a TCP netconn. + * + * @param conn the TCP netconn over which to send data + * @param vectors array of vectors containing data to send + * @param vectorcnt number of vectors in the array + * @param apiflags combination of following flags : + * - NETCONN_COPY: data will be copied into memory belonging to the stack + * - NETCONN_MORE: for TCP connection, PSH flag will be set on last segment sent + * - NETCONN_DONTBLOCK: only write the data if all data can be written at once + * @param bytes_written pointer to a location that receives the number of written bytes + * @return ERR_OK if data was sent, any other err_t on error + */ +err_t +netconn_write_vectors_partly(struct netconn *conn, struct netvector *vectors, u16_t vectorcnt, + u8_t apiflags, size_t *bytes_written) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + u8_t dontblock; + size_t size; + int i; + + LWIP_ERROR("netconn_write: invalid conn", (conn != NULL), return ERR_ARG;); + LWIP_ERROR("netconn_write: invalid conn->type", (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP), return ERR_VAL;); + dontblock = netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK); +#if LWIP_SO_SNDTIMEO + if (conn->send_timeout != 0) { + dontblock = 1; + } +#endif /* LWIP_SO_SNDTIMEO */ + if (dontblock && !bytes_written) { + /* This implies netconn_write() cannot be used for non-blocking send, since + it has no way to return the number of bytes written. */ + return ERR_VAL; + } + + /* sum up the total size */ + size = 0; + for (i = 0; i < vectorcnt; i++) { + size += vectors[i].len; + if (size < vectors[i].len) { + /* overflow */ + return ERR_VAL; + } + } + if (size == 0) { + return ERR_OK; + } else if (size > SSIZE_MAX) { + ssize_t limited; + /* this is required by the socket layer (cannot send full size_t range) */ + if (!bytes_written) { + return ERR_VAL; + } + /* limit the amount of data to send */ + limited = SSIZE_MAX; + size = (size_t)limited; + } + + API_MSG_VAR_ALLOC(msg); + /* non-blocking write sends as much */ + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.w.vector = vectors; + API_MSG_VAR_REF(msg).msg.w.vector_cnt = vectorcnt; + API_MSG_VAR_REF(msg).msg.w.vector_off = 0; + API_MSG_VAR_REF(msg).msg.w.apiflags = apiflags; + API_MSG_VAR_REF(msg).msg.w.len = size; + API_MSG_VAR_REF(msg).msg.w.offset = 0; +#if LWIP_SO_SNDTIMEO + if (conn->send_timeout != 0) { + /* get the time we started, which is later compared to + sys_now() + conn->send_timeout */ + API_MSG_VAR_REF(msg).msg.w.time_started = sys_now(); + } else { + API_MSG_VAR_REF(msg).msg.w.time_started = 0; + } +#endif /* LWIP_SO_SNDTIMEO */ + + /* For locking the core: this _can_ be delayed on low memory/low send buffer, + but if it is, this is done inside api_msg.c:do_write(), so we can use the + non-blocking version here. */ + err = netconn_apimsg(lwip_netconn_do_write, &API_MSG_VAR_REF(msg)); + if (err == ERR_OK) { + if (bytes_written != NULL) { + *bytes_written = API_MSG_VAR_REF(msg).msg.w.offset; + } + /* for blocking, check all requested bytes were written, NOTE: send_timeout is + treated as dontblock (see dontblock assignment above) */ + if (!dontblock) { + LWIP_ASSERT("do_write failed to write all bytes", API_MSG_VAR_REF(msg).msg.w.offset == size); + } + } + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_tcp + * Close or shutdown a TCP netconn (doesn't delete it). + * + * @param conn the TCP netconn to close or shutdown + * @param how fully close or only shutdown one side? + * @return ERR_OK if the netconn was closed, any other err_t on error + */ +static err_t +netconn_close_shutdown(struct netconn *conn, u8_t how) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + LWIP_UNUSED_ARG(how); + + LWIP_ERROR("netconn_close: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; +#if LWIP_TCP + /* shutting down both ends is the same as closing */ + API_MSG_VAR_REF(msg).msg.sd.shut = how; +#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER + /* get the time we started, which is later compared to + sys_now() + conn->send_timeout */ + API_MSG_VAR_REF(msg).msg.sd.time_started = sys_now(); +#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + API_MSG_VAR_REF(msg).msg.sd.polls_left = + ((LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT + TCP_SLOW_INTERVAL - 1) / TCP_SLOW_INTERVAL) + 1; +#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ +#endif /* LWIP_TCP */ + err = netconn_apimsg(lwip_netconn_do_close, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_tcp + * Close a TCP netconn (doesn't delete it). + * + * @param conn the TCP netconn to close + * @return ERR_OK if the netconn was closed, any other err_t on error + */ +err_t +netconn_close(struct netconn *conn) +{ + /* shutting down both ends is the same as closing */ + return netconn_close_shutdown(conn, NETCONN_SHUT_RDWR); +} + +/** + * @ingroup netconn_common + * Get and reset pending error on a netconn + * + * @param conn the netconn to get the error from + * @return and pending error or ERR_OK if no error was pending + */ +err_t +netconn_err(struct netconn *conn) +{ + err_t err; + SYS_ARCH_DECL_PROTECT(lev); + if (conn == NULL) { + return ERR_OK; + } + SYS_ARCH_PROTECT(lev); + err = conn->pending_err; + conn->pending_err = ERR_OK; + SYS_ARCH_UNPROTECT(lev); + return err; +} + +/** + * @ingroup netconn_tcp + * Shut down one or both sides of a TCP netconn (doesn't delete it). + * + * @param conn the TCP netconn to shut down + * @param shut_rx shut down the RX side (no more read possible after this) + * @param shut_tx shut down the TX side (no more write possible after this) + * @return ERR_OK if the netconn was closed, any other err_t on error + */ +err_t +netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx) +{ + return netconn_close_shutdown(conn, (u8_t)((shut_rx ? NETCONN_SHUT_RD : 0) | (shut_tx ? NETCONN_SHUT_WR : 0))); +} + +#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) +/** + * @ingroup netconn_udp + * Join multicast groups for UDP netconns. + * + * @param conn the UDP netconn for which to change multicast addresses + * @param multiaddr IP address of the multicast group to join or leave + * @param netif_addr the IP address of the network interface on which to send + * the igmp message + * @param join_or_leave flag whether to send a join- or leave-message + * @return ERR_OK if the action was taken, any err_t on error + */ +err_t +netconn_join_leave_group(struct netconn *conn, + const ip_addr_t *multiaddr, + const ip_addr_t *netif_addr, + enum netconn_igmp join_or_leave) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_join_leave_group: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IP_ADDR_ANY alias) to subsequent functions */ + if (multiaddr == NULL) { + multiaddr = IP4_ADDR_ANY; + } + if (netif_addr == NULL) { + netif_addr = IP4_ADDR_ANY; + } +#endif /* LWIP_IPV4 */ + + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.jl.multiaddr = API_MSG_VAR_REF(multiaddr); + API_MSG_VAR_REF(msg).msg.jl.netif_addr = API_MSG_VAR_REF(netif_addr); + API_MSG_VAR_REF(msg).msg.jl.join_or_leave = join_or_leave; + err = netconn_apimsg(lwip_netconn_do_join_leave_group, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} +/** + * @ingroup netconn_udp + * Join multicast groups for UDP netconns. + * + * @param conn the UDP netconn for which to change multicast addresses + * @param multiaddr IP address of the multicast group to join or leave + * @param if_idx the index of the netif + * @param join_or_leave flag whether to send a join- or leave-message + * @return ERR_OK if the action was taken, any err_t on error + */ +err_t +netconn_join_leave_group_netif(struct netconn *conn, + const ip_addr_t *multiaddr, + u8_t if_idx, + enum netconn_igmp join_or_leave) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_join_leave_group: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IP_ADDR_ANY alias) to subsequent functions */ + if (multiaddr == NULL) { + multiaddr = IP4_ADDR_ANY; + } + if (if_idx == NETIF_NO_INDEX) { + return ERR_IF; + } +#endif /* LWIP_IPV4 */ + + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.jl.multiaddr = API_MSG_VAR_REF(multiaddr); + API_MSG_VAR_REF(msg).msg.jl.if_idx = if_idx; + API_MSG_VAR_REF(msg).msg.jl.join_or_leave = join_or_leave; + err = netconn_apimsg(lwip_netconn_do_join_leave_group_netif, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} +#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */ + +#if LWIP_DNS +/** + * @ingroup netconn_common + * Execute a DNS query, only one IP address is returned + * + * @param name a string representation of the DNS host name to query + * @param addr a preallocated ip_addr_t where to store the resolved IP address + * @return ERR_OK: resolving succeeded + * ERR_MEM: memory error, try again later + * ERR_ARG: dns client not initialized or invalid hostname + * ERR_VAL: dns server response was invalid + */ +#if LWIP_IPV4 && LWIP_IPV6 +/** @param dns_addrtype IP address type (IPv4 / IPv6) */ +err_t +netconn_gethostbyname_addrtype(const char *name, ip_addr_t *addr, u8_t dns_addrtype) +#else +err_t +netconn_gethostbyname(const char *name, ip_addr_t *addr) +#endif +{ + API_VAR_DECLARE(struct dns_api_msg, msg); +#if !LWIP_MPU_COMPATIBLE + sys_sem_t sem; +#endif /* LWIP_MPU_COMPATIBLE */ + err_t err; + err_t cberr; + + LWIP_ERROR("netconn_gethostbyname: invalid name", (name != NULL), return ERR_ARG;); + LWIP_ERROR("netconn_gethostbyname: invalid addr", (addr != NULL), return ERR_ARG;); +#if LWIP_MPU_COMPATIBLE + if (strlen(name) >= DNS_MAX_NAME_LENGTH) { + return ERR_ARG; + } +#endif + +#ifdef LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE +#if LWIP_IPV4 && LWIP_IPV6 + if (LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE(name, addr, dns_addrtype, &err)) { +#else + if (LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE(name, addr, NETCONN_DNS_DEFAULT, &err)) { +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + return err; + } +#endif /* LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE */ + + API_VAR_ALLOC(struct dns_api_msg, MEMP_DNS_API_MSG, msg, ERR_MEM); +#if LWIP_MPU_COMPATIBLE + strncpy(API_VAR_REF(msg).name, name, DNS_MAX_NAME_LENGTH - 1); + API_VAR_REF(msg).name[DNS_MAX_NAME_LENGTH - 1] = 0; +#else /* LWIP_MPU_COMPATIBLE */ + msg.err = &err; + msg.sem = &sem; + API_VAR_REF(msg).addr = API_VAR_REF(addr); + API_VAR_REF(msg).name = name; +#endif /* LWIP_MPU_COMPATIBLE */ +#if LWIP_IPV4 && LWIP_IPV6 + API_VAR_REF(msg).dns_addrtype = dns_addrtype; +#endif /* LWIP_IPV4 && LWIP_IPV6 */ +#if LWIP_NETCONN_SEM_PER_THREAD + API_VAR_REF(msg).sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else /* LWIP_NETCONN_SEM_PER_THREAD*/ + err = sys_sem_new(API_EXPR_REF(API_VAR_REF(msg).sem), 0); + if (err != ERR_OK) { + API_VAR_FREE(MEMP_DNS_API_MSG, msg); + return err; + } +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + cberr = tcpip_send_msg_wait_sem(lwip_netconn_do_gethostbyname, &API_VAR_REF(msg), API_EXPR_REF(API_VAR_REF(msg).sem)); +#if !LWIP_NETCONN_SEM_PER_THREAD + sys_sem_free(API_EXPR_REF(API_VAR_REF(msg).sem)); +#endif /* !LWIP_NETCONN_SEM_PER_THREAD */ + if (cberr != ERR_OK) { + API_VAR_FREE(MEMP_DNS_API_MSG, msg); + return cberr; + } + +#if LWIP_MPU_COMPATIBLE + *addr = msg->addr; + err = msg->err; +#endif /* LWIP_MPU_COMPATIBLE */ + + API_VAR_FREE(MEMP_DNS_API_MSG, msg); + return err; +} +#endif /* LWIP_DNS*/ + +#if LWIP_NETCONN_SEM_PER_THREAD +void +netconn_thread_init(void) +{ + sys_sem_t *sem = LWIP_NETCONN_THREAD_SEM_GET(); + if (!sys_sem_valid(sem)) { + /* call alloc only once */ + LWIP_NETCONN_THREAD_SEM_ALLOC(); + LWIP_ASSERT("LWIP_NETCONN_THREAD_SEM_ALLOC() failed", sys_sem_valid(LWIP_NETCONN_THREAD_SEM_GET())); + } +} + +void +netconn_thread_cleanup(void) +{ + sys_sem_t *sem = LWIP_NETCONN_THREAD_SEM_GET(); + if (sys_sem_valid(sem)) { + /* call free only once */ + LWIP_NETCONN_THREAD_SEM_FREE(); + } +} +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + +#endif /* LWIP_NETCONN */ diff --git a/lib/lwip/api/api_msg.c b/lib/lwip/api/api_msg.c new file mode 100644 index 0000000000..8092be96c2 --- /dev/null +++ b/lib/lwip/api/api_msg.c @@ -0,0 +1,2177 @@ +/** + * @file + * Sequential API Internal module + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/priv/api_msg.h" + +#include "lwip/ip.h" +#include "lwip/ip_addr.h" +#include "lwip/udp.h" +#include "lwip/tcp.h" +#include "lwip/raw.h" + +#include "lwip/memp.h" +#include "lwip/igmp.h" +#include "lwip/dns.h" +#include "lwip/mld6.h" +#include "lwip/priv/tcpip_priv.h" + +#include <string.h> + +/* netconns are polled once per second (e.g. continue write on memory error) */ +#define NETCONN_TCP_POLL_INTERVAL 2 + +#define SET_NONBLOCKING_CONNECT(conn, val) do { if (val) { \ + netconn_set_flags(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT); \ +} else { \ + netconn_clear_flags(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT); }} while(0) +#define IN_NONBLOCKING_CONNECT(conn) netconn_is_flag_set(conn, NETCONN_FLAG_IN_NONBLOCKING_CONNECT) + +#if LWIP_NETCONN_FULLDUPLEX +#define NETCONN_MBOX_VALID(conn, mbox) (sys_mbox_valid(mbox) && ((conn->flags & NETCONN_FLAG_MBOXINVALID) == 0)) +#else +#define NETCONN_MBOX_VALID(conn, mbox) sys_mbox_valid(mbox) +#endif + +/* forward declarations */ +#if LWIP_TCP +#if LWIP_TCPIP_CORE_LOCKING +#define WRITE_DELAYED , 1 +#define WRITE_DELAYED_PARAM , u8_t delayed +#else /* LWIP_TCPIP_CORE_LOCKING */ +#define WRITE_DELAYED +#define WRITE_DELAYED_PARAM +#endif /* LWIP_TCPIP_CORE_LOCKING */ +static err_t lwip_netconn_do_writemore(struct netconn *conn WRITE_DELAYED_PARAM); +static err_t lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM); +#endif + +static void netconn_drain(struct netconn *conn); + +#if LWIP_TCPIP_CORE_LOCKING +#define TCPIP_APIMSG_ACK(m) +#else /* LWIP_TCPIP_CORE_LOCKING */ +#define TCPIP_APIMSG_ACK(m) do { sys_sem_signal(LWIP_API_MSG_SEM(m)); } while(0) +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +#if LWIP_NETCONN_FULLDUPLEX +static const u8_t netconn_deleted = 0; + +int +lwip_netconn_is_deallocated_msg(void *msg) +{ + if (msg == &netconn_deleted) { + return 1; + } + return 0; +} +#endif /* LWIP_NETCONN_FULLDUPLEX */ + +#if LWIP_TCP +static const u8_t netconn_aborted = 0; +static const u8_t netconn_reset = 0; +static const u8_t netconn_closed = 0; + +/** Translate an error to a unique void* passed via an mbox */ +static void * +lwip_netconn_err_to_msg(err_t err) +{ + switch (err) { + case ERR_ABRT: + return LWIP_CONST_CAST(void *, &netconn_aborted); + case ERR_RST: + return LWIP_CONST_CAST(void *, &netconn_reset); + case ERR_CLSD: + return LWIP_CONST_CAST(void *, &netconn_closed); + default: + LWIP_ASSERT("unhandled error", err == ERR_OK); + return NULL; + } +} + +int +lwip_netconn_is_err_msg(void *msg, err_t *err) +{ + LWIP_ASSERT("err != NULL", err != NULL); + + if (msg == &netconn_aborted) { + *err = ERR_ABRT; + return 1; + } else if (msg == &netconn_reset) { + *err = ERR_RST; + return 1; + } else if (msg == &netconn_closed) { + *err = ERR_CLSD; + return 1; + } + return 0; +} +#endif /* LWIP_TCP */ + + +#if LWIP_RAW +/** + * Receive callback function for RAW netconns. + * Doesn't 'eat' the packet, only copies it and sends it to + * conn->recvmbox + * + * @see raw.h (struct raw_pcb.recv) for parameters and return value + */ +static u8_t +recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p, + const ip_addr_t *addr) +{ + struct pbuf *q; + struct netbuf *buf; + struct netconn *conn; + + LWIP_UNUSED_ARG(addr); + conn = (struct netconn *)arg; + + if ((conn != NULL) && NETCONN_MBOX_VALID(conn, &conn->recvmbox)) { +#if LWIP_SO_RCVBUF + int recv_avail; + SYS_ARCH_GET(conn->recv_avail, recv_avail); + if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) { + return 0; + } +#endif /* LWIP_SO_RCVBUF */ + /* copy the whole packet into new pbufs */ + q = pbuf_clone(PBUF_RAW, PBUF_RAM, p); + if (q != NULL) { + u16_t len; + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + pbuf_free(q); + return 0; + } + + buf->p = q; + buf->ptr = q; + ip_addr_copy(buf->addr, *ip_current_src_addr()); + buf->port = pcb->protocol; + + len = q->tot_len; + if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) { + netbuf_delete(buf); + return 0; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } + } + } + + return 0; /* do not eat the packet */ +} +#endif /* LWIP_RAW*/ + +#if LWIP_UDP +/** + * Receive callback function for UDP netconns. + * Posts the packet to conn->recvmbox or deletes it on memory error. + * + * @see udp.h (struct udp_pcb.recv) for parameters + */ +static void +recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *addr, u16_t port) +{ + struct netbuf *buf; + struct netconn *conn; + u16_t len; + err_t err; +#if LWIP_SO_RCVBUF + int recv_avail; +#endif /* LWIP_SO_RCVBUF */ + + LWIP_UNUSED_ARG(pcb); /* only used for asserts... */ + LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL); + LWIP_ASSERT("recv_udp must have an argument", arg != NULL); + conn = (struct netconn *)arg; + + if (conn == NULL) { + pbuf_free(p); + return; + } + + LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb); + +#if LWIP_SO_RCVBUF + SYS_ARCH_GET(conn->recv_avail, recv_avail); + if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox) || + ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) { +#else /* LWIP_SO_RCVBUF */ + if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox)) { +#endif /* LWIP_SO_RCVBUF */ + pbuf_free(p); + return; + } + + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + pbuf_free(p); + return; + } else { + buf->p = p; + buf->ptr = p; + ip_addr_set(&buf->addr, addr); + buf->port = port; +#if LWIP_NETBUF_RECVINFO + if (conn->flags & NETCONN_FLAG_PKTINFO) { + /* get the UDP header - always in the first pbuf, ensured by udp_input */ + const struct udp_hdr *udphdr = (const struct udp_hdr *)ip_next_header_ptr(); + buf->flags = NETBUF_FLAG_DESTADDR; + ip_addr_set(&buf->toaddr, ip_current_dest_addr()); + buf->toport_chksum = udphdr->dest; + } +#endif /* LWIP_NETBUF_RECVINFO */ + } + + len = p->tot_len; + err = sys_mbox_trypost(&conn->recvmbox, buf); + if (err != ERR_OK) { + netbuf_delete(buf); + LWIP_DEBUGF(API_MSG_DEBUG, ("recv_udp: sys_mbox_trypost failed, err=%d\n", err)); + return; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } +} +#endif /* LWIP_UDP */ + +#if LWIP_TCP +/** + * Receive callback function for TCP netconns. + * Posts the packet to conn->recvmbox, but doesn't delete it on errors. + * + * @see tcp.h (struct tcp_pcb.recv) for parameters and return value + */ +static err_t +recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) +{ + struct netconn *conn; + u16_t len; + void *msg; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL); + LWIP_ASSERT("recv_tcp must have an argument", arg != NULL); + LWIP_ASSERT("err != ERR_OK unhandled", err == ERR_OK); + LWIP_UNUSED_ARG(err); /* for LWIP_NOASSERT */ + conn = (struct netconn *)arg; + + if (conn == NULL) { + return ERR_VAL; + } + LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb); + + if (!NETCONN_MBOX_VALID(conn, &conn->recvmbox)) { + /* recvmbox already deleted */ + if (p != NULL) { + tcp_recved(pcb, p->tot_len); + pbuf_free(p); + } + return ERR_OK; + } + /* Unlike for UDP or RAW pcbs, don't check for available space + using recv_avail since that could break the connection + (data is already ACKed) */ + + if (p != NULL) { + msg = p; + len = p->tot_len; + } else { + msg = LWIP_CONST_CAST(void *, &netconn_closed); + len = 0; + } + + if (sys_mbox_trypost(&conn->recvmbox, msg) != ERR_OK) { + /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */ + return ERR_MEM; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } + + return ERR_OK; +} + +/** + * Poll callback function for TCP netconns. + * Wakes up an application thread that waits for a connection to close + * or data to be sent. The application thread then takes the + * appropriate action to go on. + * + * Signals the conn->sem. + * netconn_close waits for conn->sem if closing failed. + * + * @see tcp.h (struct tcp_pcb.poll) for parameters and return value + */ +static err_t +poll_tcp(void *arg, struct tcp_pcb *pcb) +{ + struct netconn *conn = (struct netconn *)arg; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + if (conn->state == NETCONN_WRITE) { + lwip_netconn_do_writemore(conn WRITE_DELAYED); + } else if (conn->state == NETCONN_CLOSE) { +#if !LWIP_SO_SNDTIMEO && !LWIP_SO_LINGER + if (conn->current_msg && conn->current_msg->msg.sd.polls_left) { + conn->current_msg->msg.sd.polls_left--; + } +#endif /* !LWIP_SO_SNDTIMEO && !LWIP_SO_LINGER */ + lwip_netconn_do_close_internal(conn WRITE_DELAYED); + } + /* @todo: implement connect timeout here? */ + + /* Did a nonblocking write fail before? Then check available write-space. */ + if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) { + /* If the queued byte- or pbuf-count drops below the configured low-water limit, + let select mark this pcb as writable again. */ + if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) && + (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) { + netconn_clear_flags(conn, NETCONN_FLAG_CHECK_WRITESPACE); + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + } + } + + return ERR_OK; +} + +/** + * Sent callback function for TCP netconns. + * Signals the conn->sem and calls API_EVENT. + * netconn_write waits for conn->sem if send buffer is low. + * + * @see tcp.h (struct tcp_pcb.sent) for parameters and return value + */ +static err_t +sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len) +{ + struct netconn *conn = (struct netconn *)arg; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + if (conn) { + if (conn->state == NETCONN_WRITE) { + lwip_netconn_do_writemore(conn WRITE_DELAYED); + } else if (conn->state == NETCONN_CLOSE) { + lwip_netconn_do_close_internal(conn WRITE_DELAYED); + } + + /* If the queued byte- or pbuf-count drops below the configured low-water limit, + let select mark this pcb as writable again. */ + if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) && + (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) { + netconn_clear_flags(conn, NETCONN_FLAG_CHECK_WRITESPACE); + API_EVENT(conn, NETCONN_EVT_SENDPLUS, len); + } + } + + return ERR_OK; +} + +/** + * Error callback function for TCP netconns. + * Signals conn->sem, posts to all conn mboxes and calls API_EVENT. + * The application thread has then to decide what to do. + * + * @see tcp.h (struct tcp_pcb.err) for parameters + */ +static void +err_tcp(void *arg, err_t err) +{ + struct netconn *conn; + enum netconn_state old_state; + void *mbox_msg; + SYS_ARCH_DECL_PROTECT(lev); + + conn = (struct netconn *)arg; + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + SYS_ARCH_PROTECT(lev); + + /* when err is called, the pcb is deallocated, so delete the reference */ + conn->pcb.tcp = NULL; + /* store pending error */ + conn->pending_err = err; + /* prevent application threads from blocking on 'recvmbox'/'acceptmbox' */ + conn->flags |= NETCONN_FLAG_MBOXCLOSED; + + /* reset conn->state now before waking up other threads */ + old_state = conn->state; + conn->state = NETCONN_NONE; + + SYS_ARCH_UNPROTECT(lev); + + /* Notify the user layer about a connection error. Used to signal select. */ + API_EVENT(conn, NETCONN_EVT_ERROR, 0); + /* Try to release selects pending on 'read' or 'write', too. + They will get an error if they actually try to read or write. */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + + mbox_msg = lwip_netconn_err_to_msg(err); + /* pass error message to recvmbox to wake up pending recv */ + if (NETCONN_MBOX_VALID(conn, &conn->recvmbox)) { + /* use trypost to prevent deadlock */ + sys_mbox_trypost(&conn->recvmbox, mbox_msg); + } + /* pass error message to acceptmbox to wake up pending accept */ + if (NETCONN_MBOX_VALID(conn, &conn->acceptmbox)) { + /* use trypost to prevent deadlock */ + sys_mbox_trypost(&conn->acceptmbox, mbox_msg); + } + + if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) || + (old_state == NETCONN_CONNECT)) { + /* calling lwip_netconn_do_writemore/lwip_netconn_do_close_internal is not necessary + since the pcb has already been deleted! */ + int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn); + SET_NONBLOCKING_CONNECT(conn, 0); + + if (!was_nonblocking_connect) { + sys_sem_t *op_completed_sem; + /* set error return code */ + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + if (old_state == NETCONN_CLOSE) { + /* let close succeed: the connection is closed after all... */ + conn->current_msg->err = ERR_OK; + } else { + /* Write and connect fail */ + conn->current_msg->err = err; + } + op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); + LWIP_ASSERT("invalid op_completed_sem", sys_sem_valid(op_completed_sem)); + conn->current_msg = NULL; + /* wake up the waiting task */ + sys_sem_signal(op_completed_sem); + } else { + /* @todo: test what happens for error on nonblocking connect */ + } + } else { + LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL); + } +} + +/** + * Setup a tcp_pcb with the correct callback function pointers + * and their arguments. + * + * @param conn the TCP netconn to setup + */ +static void +setup_tcp(struct netconn *conn) +{ + struct tcp_pcb *pcb; + + pcb = conn->pcb.tcp; + tcp_arg(pcb, conn); + tcp_recv(pcb, recv_tcp); + tcp_sent(pcb, sent_tcp); + tcp_poll(pcb, poll_tcp, NETCONN_TCP_POLL_INTERVAL); + tcp_err(pcb, err_tcp); +} + +/** + * Accept callback function for TCP netconns. + * Allocates a new netconn and posts that to conn->acceptmbox. + * + * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value + */ +static err_t +accept_function(void *arg, struct tcp_pcb *newpcb, err_t err) +{ + struct netconn *newconn; + struct netconn *conn = (struct netconn *)arg; + + if (conn == NULL) { + return ERR_VAL; + } + if (!NETCONN_MBOX_VALID(conn, &conn->acceptmbox)) { + LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n")); + return ERR_VAL; + } + + if (newpcb == NULL) { + /* out-of-pcbs during connect: pass on this error to the application */ + if (sys_mbox_trypost(&conn->acceptmbox, lwip_netconn_err_to_msg(ERR_ABRT)) == ERR_OK) { + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + return ERR_VAL; + } + LWIP_ASSERT("expect newpcb == NULL or err == ERR_OK", err == ERR_OK); + LWIP_UNUSED_ARG(err); /* for LWIP_NOASSERT */ + + LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->state: %s\n", tcp_debug_state_str(newpcb->state))); + + /* We have to set the callback here even though + * the new socket is unknown. newconn->socket is marked as -1. */ + newconn = netconn_alloc(conn->type, conn->callback); + if (newconn == NULL) { + /* outof netconns: pass on this error to the application */ + if (sys_mbox_trypost(&conn->acceptmbox, lwip_netconn_err_to_msg(ERR_ABRT)) == ERR_OK) { + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + return ERR_MEM; + } + newconn->pcb.tcp = newpcb; + setup_tcp(newconn); + + /* handle backlog counter */ + tcp_backlog_delayed(newpcb); + + if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) { + /* When returning != ERR_OK, the pcb is aborted in tcp_process(), + so do nothing here! */ + /* remove all references to this netconn from the pcb */ + struct tcp_pcb *pcb = newconn->pcb.tcp; + tcp_arg(pcb, NULL); + tcp_recv(pcb, NULL); + tcp_sent(pcb, NULL); + tcp_poll(pcb, NULL, 0); + tcp_err(pcb, NULL); + /* remove reference from to the pcb from this netconn */ + newconn->pcb.tcp = NULL; + /* no need to drain since we know the recvmbox is empty. */ + sys_mbox_free(&newconn->recvmbox); + sys_mbox_set_invalid(&newconn->recvmbox); + netconn_free(newconn); + return ERR_MEM; + } else { + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Create a new pcb of a specific type. + * Called from lwip_netconn_do_newconn(). + * + * @param msg the api_msg describing the connection type + */ +static void +pcb_new(struct api_msg *msg) +{ + enum lwip_ip_addr_type iptype = IPADDR_TYPE_V4; + + LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL); + +#if LWIP_IPV6 && LWIP_IPV4 + /* IPv6: Dual-stack by default, unless netconn_set_ipv6only() is called */ + if (NETCONNTYPE_ISIPV6(netconn_type(msg->conn))) { + iptype = IPADDR_TYPE_ANY; + } +#endif + + /* Allocate a PCB for this connection */ + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + msg->conn->pcb.raw = raw_new_ip_type(iptype, msg->msg.n.proto); + if (msg->conn->pcb.raw != NULL) { +#if LWIP_IPV6 + /* ICMPv6 packets should always have checksum calculated by the stack as per RFC 3542 chapter 3.1 */ + if (NETCONNTYPE_ISIPV6(msg->conn->type) && msg->conn->pcb.raw->protocol == IP6_NEXTH_ICMP6) { + msg->conn->pcb.raw->chksum_reqd = 1; + msg->conn->pcb.raw->chksum_offset = 2; + } +#endif /* LWIP_IPV6 */ + raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn); + } + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->conn->pcb.udp = udp_new_ip_type(iptype); + if (msg->conn->pcb.udp != NULL) { +#if LWIP_UDPLITE + if (NETCONNTYPE_ISUDPLITE(msg->conn->type)) { + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE); + } +#endif /* LWIP_UDPLITE */ + if (NETCONNTYPE_ISUDPNOCHKSUM(msg->conn->type)) { + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM); + } + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + } + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->conn->pcb.tcp = tcp_new_ip_type(iptype); + if (msg->conn->pcb.tcp != NULL) { + setup_tcp(msg->conn); + } + break; +#endif /* LWIP_TCP */ + default: + /* Unsupported netconn type, e.g. protocol disabled */ + msg->err = ERR_VAL; + return; + } + if (msg->conn->pcb.ip == NULL) { + msg->err = ERR_MEM; + } +} + +/** + * Create a new pcb of a specific type inside a netconn. + * Called from netconn_new_with_proto_and_callback. + * + * @param m the api_msg describing the connection type + */ +void +lwip_netconn_do_newconn(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + + msg->err = ERR_OK; + if (msg->conn->pcb.tcp == NULL) { + pcb_new(msg); + } + /* Else? This "new" connection already has a PCB allocated. */ + /* Is this an error condition? Should it be deleted? */ + /* We currently just are happy and return. */ + + TCPIP_APIMSG_ACK(msg); +} + +/** + * Create a new netconn (of a specific type) that has a callback function. + * The corresponding pcb is NOT created! + * + * @param t the type of 'connection' to create (@see enum netconn_type) + * @param callback a function to call on status changes (RX available, TX'ed) + * @return a newly allocated struct netconn or + * NULL on memory error + */ +struct netconn * +netconn_alloc(enum netconn_type t, netconn_callback callback) +{ + struct netconn *conn; + int size; + u8_t init_flags = 0; + + conn = (struct netconn *)memp_malloc(MEMP_NETCONN); + if (conn == NULL) { + return NULL; + } + + conn->pending_err = ERR_OK; + conn->type = t; + conn->pcb.tcp = NULL; +#if LWIP_NETCONN_FULLDUPLEX + conn->mbox_threads_waiting = 0; +#endif + + /* If all sizes are the same, every compiler should optimize this switch to nothing */ + switch (NETCONNTYPE_GROUP(t)) { +#if LWIP_RAW + case NETCONN_RAW: + size = DEFAULT_RAW_RECVMBOX_SIZE; + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + size = DEFAULT_UDP_RECVMBOX_SIZE; +#if LWIP_NETBUF_RECVINFO + init_flags |= NETCONN_FLAG_PKTINFO; +#endif /* LWIP_NETBUF_RECVINFO */ + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + size = DEFAULT_TCP_RECVMBOX_SIZE; + break; +#endif /* LWIP_TCP */ + default: + LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0); + goto free_and_return; + } + + if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) { + goto free_and_return; + } +#if !LWIP_NETCONN_SEM_PER_THREAD + if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) { + sys_mbox_free(&conn->recvmbox); + goto free_and_return; + } +#endif + +#if LWIP_TCP + sys_mbox_set_invalid(&conn->acceptmbox); +#endif + conn->state = NETCONN_NONE; + /* initialize socket to -1 since 0 is a valid socket */ + conn->callback_arg.socket = -1; + conn->callback = callback; +#if LWIP_TCP + conn->current_msg = NULL; +#endif /* LWIP_TCP */ +#if LWIP_SO_SNDTIMEO + conn->send_timeout = 0; +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_RCVTIMEO + conn->recv_timeout = 0; +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF + conn->recv_bufsize = RECV_BUFSIZE_DEFAULT; + conn->recv_avail = 0; +#endif /* LWIP_SO_RCVBUF */ +#if LWIP_SO_LINGER + conn->linger = -1; +#endif /* LWIP_SO_LINGER */ + conn->flags = init_flags; + return conn; +free_and_return: + memp_free(MEMP_NETCONN, conn); + return NULL; +} + +/** + * Delete a netconn and all its resources. + * The pcb is NOT freed (since we might not be in the right thread context do this). + * + * @param conn the netconn to free + */ +void +netconn_free(struct netconn *conn) +{ + LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL); + +#if LWIP_NETCONN_FULLDUPLEX + /* in fullduplex, netconn is drained here */ + netconn_drain(conn); +#endif /* LWIP_NETCONN_FULLDUPLEX */ + + LWIP_ASSERT("recvmbox must be deallocated before calling this function", + !sys_mbox_valid(&conn->recvmbox)); +#if LWIP_TCP + LWIP_ASSERT("acceptmbox must be deallocated before calling this function", + !sys_mbox_valid(&conn->acceptmbox)); +#endif /* LWIP_TCP */ + +#if !LWIP_NETCONN_SEM_PER_THREAD + sys_sem_free(&conn->op_completed); + sys_sem_set_invalid(&conn->op_completed); +#endif + + memp_free(MEMP_NETCONN, conn); +} + +/** + * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in + * these mboxes + * + * @param conn the netconn to free + * @bytes_drained bytes drained from recvmbox + * @accepts_drained pending connections drained from acceptmbox + */ +static void +netconn_drain(struct netconn *conn) +{ + void *mem; + + /* This runs when mbox and netconn are marked as closed, + so we don't need to lock against rx packets */ +#if LWIP_NETCONN_FULLDUPLEX + LWIP_ASSERT("netconn marked closed", conn->flags & NETCONN_FLAG_MBOXINVALID); +#endif /* LWIP_NETCONN_FULLDUPLEX */ + + /* Delete and drain the recvmbox. */ + if (sys_mbox_valid(&conn->recvmbox)) { + while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) { +#if LWIP_NETCONN_FULLDUPLEX + if (!lwip_netconn_is_deallocated_msg(mem)) +#endif /* LWIP_NETCONN_FULLDUPLEX */ + { +#if LWIP_TCP + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) { + err_t err; + if (!lwip_netconn_is_err_msg(mem, &err)) { + pbuf_free((struct pbuf *)mem); + } + } else +#endif /* LWIP_TCP */ + { + netbuf_delete((struct netbuf *)mem); + } + } + } + sys_mbox_free(&conn->recvmbox); + sys_mbox_set_invalid(&conn->recvmbox); + } + + /* Delete and drain the acceptmbox. */ +#if LWIP_TCP + if (sys_mbox_valid(&conn->acceptmbox)) { + while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) { +#if LWIP_NETCONN_FULLDUPLEX + if (!lwip_netconn_is_deallocated_msg(mem)) +#endif /* LWIP_NETCONN_FULLDUPLEX */ + { + err_t err; + if (!lwip_netconn_is_err_msg(mem, &err)) { + struct netconn *newconn = (struct netconn *)mem; + /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */ + /* pcb might be set to NULL already by err_tcp() */ + /* drain recvmbox */ + netconn_drain(newconn); + if (newconn->pcb.tcp != NULL) { + tcp_abort(newconn->pcb.tcp); + newconn->pcb.tcp = NULL; + } + netconn_free(newconn); + } + } + } + sys_mbox_free(&conn->acceptmbox); + sys_mbox_set_invalid(&conn->acceptmbox); + } +#endif /* LWIP_TCP */ +} + +#if LWIP_NETCONN_FULLDUPLEX +static void +netconn_mark_mbox_invalid(struct netconn *conn) +{ + int i, num_waiting; + void *msg = LWIP_CONST_CAST(void *, &netconn_deleted); + + /* Prevent new calls/threads from reading from the mbox */ + conn->flags |= NETCONN_FLAG_MBOXINVALID; + + SYS_ARCH_LOCKED(num_waiting = conn->mbox_threads_waiting); + for (i = 0; i < num_waiting; i++) { + if (sys_mbox_valid_val(conn->recvmbox)) { + sys_mbox_trypost(&conn->recvmbox, msg); + } else { + sys_mbox_trypost(&conn->acceptmbox, msg); + } + } +} +#endif /* LWIP_NETCONN_FULLDUPLEX */ + +#if LWIP_TCP +/** + * Internal helper function to close a TCP netconn: since this sometimes + * doesn't work at the first attempt, this function is called from multiple + * places. + * + * @param conn the TCP netconn to close + */ +static err_t +lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM) +{ + err_t err; + u8_t shut, shut_rx, shut_tx, shut_close; + u8_t close_finished = 0; + struct tcp_pcb *tpcb; +#if LWIP_SO_LINGER + u8_t linger_wait_required = 0; +#endif /* LWIP_SO_LINGER */ + + LWIP_ASSERT("invalid conn", (conn != NULL)); + LWIP_ASSERT("this is for tcp netconns only", (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP)); + LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE)); + LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL)); + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + + tpcb = conn->pcb.tcp; + shut = conn->current_msg->msg.sd.shut; + shut_rx = shut & NETCONN_SHUT_RD; + shut_tx = shut & NETCONN_SHUT_WR; + /* shutting down both ends is the same as closing + (also if RD or WR side was shut down before already) */ + if (shut == NETCONN_SHUT_RDWR) { + shut_close = 1; + } else if (shut_rx && + ((tpcb->state == FIN_WAIT_1) || + (tpcb->state == FIN_WAIT_2) || + (tpcb->state == CLOSING))) { + shut_close = 1; + } else if (shut_tx && ((tpcb->flags & TF_RXCLOSED) != 0)) { + shut_close = 1; + } else { + shut_close = 0; + } + + /* Set back some callback pointers */ + if (shut_close) { + tcp_arg(tpcb, NULL); + } + if (tpcb->state == LISTEN) { + tcp_accept(tpcb, NULL); + } else { + /* some callbacks have to be reset if tcp_close is not successful */ + if (shut_rx) { + tcp_recv(tpcb, NULL); + tcp_accept(tpcb, NULL); + } + if (shut_tx) { + tcp_sent(tpcb, NULL); + } + if (shut_close) { + tcp_poll(tpcb, NULL, 0); + tcp_err(tpcb, NULL); + } + } + /* Try to close the connection */ + if (shut_close) { +#if LWIP_SO_LINGER + /* check linger possibilities before calling tcp_close */ + err = ERR_OK; + /* linger enabled/required at all? (i.e. is there untransmitted data left?) */ + if ((conn->linger >= 0) && (conn->pcb.tcp->unsent || conn->pcb.tcp->unacked)) { + if ((conn->linger == 0)) { + /* data left but linger prevents waiting */ + tcp_abort(tpcb); + tpcb = NULL; + } else if (conn->linger > 0) { + /* data left and linger says we should wait */ + if (netconn_is_nonblocking(conn)) { + /* data left on a nonblocking netconn -> cannot linger */ + err = ERR_WOULDBLOCK; + } else if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >= + (conn->linger * 1000)) { + /* data left but linger timeout has expired (this happens on further + calls to this function through poll_tcp */ + tcp_abort(tpcb); + tpcb = NULL; + } else { + /* data left -> need to wait for ACK after successful close */ + linger_wait_required = 1; + } + } + } + if ((err == ERR_OK) && (tpcb != NULL)) +#endif /* LWIP_SO_LINGER */ + { + err = tcp_close(tpcb); + } + } else { + err = tcp_shutdown(tpcb, shut_rx, shut_tx); + } + if (err == ERR_OK) { + close_finished = 1; +#if LWIP_SO_LINGER + if (linger_wait_required) { + /* wait for ACK of all unsent/unacked data by just getting called again */ + close_finished = 0; + err = ERR_INPROGRESS; + } +#endif /* LWIP_SO_LINGER */ + } else { + if (err == ERR_MEM) { + /* Closing failed because of memory shortage, try again later. Even for + nonblocking netconns, we have to wait since no standard socket application + is prepared for close failing because of resource shortage. + Check the timeout: this is kind of an lwip addition to the standard sockets: + we wait for some time when failing to allocate a segment for the FIN */ +#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER + s32_t close_timeout = LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT; +#if LWIP_SO_SNDTIMEO + if (conn->send_timeout > 0) { + close_timeout = conn->send_timeout; + } +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_LINGER + if (conn->linger >= 0) { + /* use linger timeout (seconds) */ + close_timeout = conn->linger * 1000U; + } +#endif + if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >= close_timeout) { +#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + if (conn->current_msg->msg.sd.polls_left == 0) { +#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + close_finished = 1; + if (shut_close) { + /* in this case, we want to RST the connection */ + tcp_abort(tpcb); + err = ERR_OK; + } + } + } else { + /* Closing failed for a non-memory error: give up */ + close_finished = 1; + } + } + if (close_finished) { + /* Closing done (succeeded, non-memory error, nonblocking error or timeout) */ + sys_sem_t *op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); + conn->current_msg->err = err; + conn->current_msg = NULL; + conn->state = NETCONN_NONE; + if (err == ERR_OK) { + if (shut_close) { + /* Set back some callback pointers as conn is going away */ + conn->pcb.tcp = NULL; + /* Trigger select() in socket layer. Make sure everybody notices activity + on the connection, error first! */ + API_EVENT(conn, NETCONN_EVT_ERROR, 0); + } + if (shut_rx) { + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + if (shut_tx) { + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + } + } +#if LWIP_TCPIP_CORE_LOCKING + if (delayed) +#endif + { + /* wake up the application task */ + sys_sem_signal(op_completed_sem); + } + return ERR_OK; + } + if (!close_finished) { + /* Closing failed and we want to wait: restore some of the callbacks */ + /* Closing of listen pcb will never fail! */ + LWIP_ASSERT("Closing a listen pcb may not fail!", (tpcb->state != LISTEN)); + if (shut_tx) { + tcp_sent(tpcb, sent_tcp); + } + /* when waiting for close, set up poll interval to 500ms */ + tcp_poll(tpcb, poll_tcp, 1); + tcp_err(tpcb, err_tcp); + tcp_arg(tpcb, conn); + /* don't restore recv callback: we don't want to receive any more data */ + } + /* If closing didn't succeed, we get called again either + from poll_tcp or from sent_tcp */ + LWIP_ASSERT("err != ERR_OK", err != ERR_OK); + return err; +} +#endif /* LWIP_TCP */ + +/** + * Delete the pcb inside a netconn. + * Called from netconn_delete. + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_delconn(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + + enum netconn_state state = msg->conn->state; + LWIP_ASSERT("netconn state error", /* this only happens for TCP netconns */ + (state == NETCONN_NONE) || (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP)); +#if LWIP_NETCONN_FULLDUPLEX + /* In full duplex mode, blocking write/connect is aborted with ERR_CLSD */ + if (state != NETCONN_NONE) { + if ((state == NETCONN_WRITE) || + ((state == NETCONN_CONNECT) && !IN_NONBLOCKING_CONNECT(msg->conn))) { + /* close requested, abort running write/connect */ + sys_sem_t *op_completed_sem; + LWIP_ASSERT("msg->conn->current_msg != NULL", msg->conn->current_msg != NULL); + op_completed_sem = LWIP_API_MSG_SEM(msg->conn->current_msg); + msg->conn->current_msg->err = ERR_CLSD; + msg->conn->current_msg = NULL; + msg->conn->state = NETCONN_NONE; + sys_sem_signal(op_completed_sem); + } + } +#else /* LWIP_NETCONN_FULLDUPLEX */ + if (((state != NETCONN_NONE) && + (state != NETCONN_LISTEN) && + (state != NETCONN_CONNECT)) || + ((state == NETCONN_CONNECT) && !IN_NONBLOCKING_CONNECT(msg->conn))) { + /* This means either a blocking write or blocking connect is running + (nonblocking write returns and sets state to NONE) */ + msg->err = ERR_INPROGRESS; + } else +#endif /* LWIP_NETCONN_FULLDUPLEX */ + { + LWIP_ASSERT("blocking connect in progress", + (state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn)); + msg->err = ERR_OK; +#if LWIP_NETCONN_FULLDUPLEX + /* Mark mboxes invalid */ + netconn_mark_mbox_invalid(msg->conn); +#else /* LWIP_NETCONN_FULLDUPLEX */ + netconn_drain(msg->conn); +#endif /* LWIP_NETCONN_FULLDUPLEX */ + + if (msg->conn->pcb.tcp != NULL) { + + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + raw_remove(msg->conn->pcb.raw); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->conn->pcb.udp->recv_arg = NULL; + udp_remove(msg->conn->pcb.udp); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL); + msg->conn->state = NETCONN_CLOSE; + msg->msg.sd.shut = NETCONN_SHUT_RDWR; + msg->conn->current_msg = msg; +#if LWIP_TCPIP_CORE_LOCKING + if (lwip_netconn_do_close_internal(msg->conn, 0) != ERR_OK) { + LWIP_ASSERT("state!", msg->conn->state == NETCONN_CLOSE); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE); + } +#else /* LWIP_TCPIP_CORE_LOCKING */ + lwip_netconn_do_close_internal(msg->conn); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + /* API_EVENT is called inside lwip_netconn_do_close_internal, before releasing + the application thread, so we can return at this point! */ + return; +#endif /* LWIP_TCP */ + default: + break; + } + msg->conn->pcb.tcp = NULL; + } + /* tcp netconns don't come here! */ + + /* @todo: this lets select make the socket readable and writable, + which is wrong! errfd instead? */ + API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0); + API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0); + } + if (sys_sem_valid(LWIP_API_MSG_SEM(msg))) { + TCPIP_APIMSG_ACK(msg); + } +} + +/** + * Bind a pcb contained in a netconn + * Called from netconn_bind. + * + * @param m the api_msg pointing to the connection and containing + * the IP address and port to bind to + */ +void +lwip_netconn_do_bind(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + err_t err; + + if (msg->conn->pcb.tcp != NULL) { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + err = raw_bind(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr)); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + err = udp_bind(msg->conn->pcb.udp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + err = tcp_bind(msg->conn->pcb.tcp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port); + break; +#endif /* LWIP_TCP */ + default: + err = ERR_VAL; + break; + } + } else { + err = ERR_VAL; + } + msg->err = err; + TCPIP_APIMSG_ACK(msg); +} +/** + * Bind a pcb contained in a netconn to an interface + * Called from netconn_bind_if. + * + * @param m the api_msg pointing to the connection and containing + * the IP address and port to bind to + */ +void +lwip_netconn_do_bind_if(void *m) +{ + struct netif *netif; + struct api_msg *msg = (struct api_msg *)m; + err_t err; + + netif = netif_get_by_index(msg->msg.bc.if_idx); + + if ((netif != NULL) && (msg->conn->pcb.tcp != NULL)) { + err = ERR_OK; + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + raw_bind_netif(msg->conn->pcb.raw, netif); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + udp_bind_netif(msg->conn->pcb.udp, netif); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + tcp_bind_netif(msg->conn->pcb.tcp, netif); + break; +#endif /* LWIP_TCP */ + default: + err = ERR_VAL; + break; + } + } else { + err = ERR_VAL; + } + msg->err = err; + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * TCP callback function if a connection (opened by tcp_connect/lwip_netconn_do_connect) has + * been established (or reset by the remote host). + * + * @see tcp.h (struct tcp_pcb.connected) for parameters and return values + */ +static err_t +lwip_netconn_do_connected(void *arg, struct tcp_pcb *pcb, err_t err) +{ + struct netconn *conn; + int was_blocking; + sys_sem_t *op_completed_sem = NULL; + + LWIP_UNUSED_ARG(pcb); + + conn = (struct netconn *)arg; + + if (conn == NULL) { + return ERR_VAL; + } + + LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT); + LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect", + (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn)); + + if (conn->current_msg != NULL) { + conn->current_msg->err = err; + op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); + } + if ((NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) && (err == ERR_OK)) { + setup_tcp(conn); + } + was_blocking = !IN_NONBLOCKING_CONNECT(conn); + SET_NONBLOCKING_CONNECT(conn, 0); + LWIP_ASSERT("blocking connect state error", + (was_blocking && op_completed_sem != NULL) || + (!was_blocking && op_completed_sem == NULL)); + conn->current_msg = NULL; + conn->state = NETCONN_NONE; + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + + if (was_blocking) { + sys_sem_signal(op_completed_sem); + } + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Connect a pcb contained inside a netconn + * Called from netconn_connect. + * + * @param m the api_msg pointing to the connection and containing + * the IP address and port to connect to + */ +void +lwip_netconn_do_connect(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + err_t err; + + if (msg->conn->pcb.tcp == NULL) { + /* This may happen when calling netconn_connect() a second time */ + err = ERR_CLSD; + } else { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + err = raw_connect(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr)); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + err = udp_connect(msg->conn->pcb.udp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + /* Prevent connect while doing any other action. */ + if (msg->conn->state == NETCONN_CONNECT) { + err = ERR_ALREADY; + } else if (msg->conn->state != NETCONN_NONE) { + err = ERR_ISCONN; + } else { + setup_tcp(msg->conn); + err = tcp_connect(msg->conn->pcb.tcp, API_EXPR_REF(msg->msg.bc.ipaddr), + msg->msg.bc.port, lwip_netconn_do_connected); + if (err == ERR_OK) { + u8_t non_blocking = netconn_is_nonblocking(msg->conn); + msg->conn->state = NETCONN_CONNECT; + SET_NONBLOCKING_CONNECT(msg->conn, non_blocking); + if (non_blocking) { + err = ERR_INPROGRESS; + } else { + msg->conn->current_msg = msg; + /* sys_sem_signal() is called from lwip_netconn_do_connected (or err_tcp()), + when the connection is established! */ +#if LWIP_TCPIP_CORE_LOCKING + LWIP_ASSERT("state!", msg->conn->state == NETCONN_CONNECT); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state != NETCONN_CONNECT); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + return; + } + } + } + break; +#endif /* LWIP_TCP */ + default: + LWIP_ERROR("Invalid netconn type", 0, do { + err = ERR_VAL; + } while (0)); + break; + } + } + msg->err = err; + /* For all other protocols, netconn_connect() calls netconn_apimsg(), + so use TCPIP_APIMSG_ACK() here. */ + TCPIP_APIMSG_ACK(msg); +} + +/** + * Disconnect a pcb contained inside a netconn + * Only used for UDP netconns. + * Called from netconn_disconnect. + * + * @param m the api_msg pointing to the connection to disconnect + */ +void +lwip_netconn_do_disconnect(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + +#if LWIP_UDP + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) { + udp_disconnect(msg->conn->pcb.udp); + msg->err = ERR_OK; + } else +#endif /* LWIP_UDP */ + { + msg->err = ERR_VAL; + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * Set a TCP pcb contained in a netconn into listen mode + * Called from netconn_listen. + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_listen(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + err_t err; + + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { + if (msg->conn->state == NETCONN_NONE) { + struct tcp_pcb *lpcb; + if (msg->conn->pcb.tcp->state != CLOSED) { + /* connection is not closed, cannot listen */ + err = ERR_VAL; + } else { + u8_t backlog; +#if TCP_LISTEN_BACKLOG + backlog = msg->msg.lb.backlog; +#else /* TCP_LISTEN_BACKLOG */ + backlog = TCP_DEFAULT_LISTEN_BACKLOG; +#endif /* TCP_LISTEN_BACKLOG */ +#if LWIP_IPV4 && LWIP_IPV6 + /* "Socket API like" dual-stack support: If IP to listen to is IP6_ADDR_ANY, + * and NETCONN_FLAG_IPV6_V6ONLY is NOT set, use IP_ANY_TYPE to listen + */ + if (ip_addr_eq(&msg->conn->pcb.ip->local_ip, IP6_ADDR_ANY) && + (netconn_get_ipv6only(msg->conn) == 0)) { + /* change PCB type to IPADDR_TYPE_ANY */ + IP_SET_TYPE_VAL(msg->conn->pcb.tcp->local_ip, IPADDR_TYPE_ANY); + IP_SET_TYPE_VAL(msg->conn->pcb.tcp->remote_ip, IPADDR_TYPE_ANY); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + lpcb = tcp_listen_with_backlog_and_err(msg->conn->pcb.tcp, backlog, &err); + + if (lpcb == NULL) { + /* in this case, the old pcb is still allocated */ + } else { + /* delete the recvmbox and allocate the acceptmbox */ + if (sys_mbox_valid(&msg->conn->recvmbox)) { + /** @todo: should we drain the recvmbox here? */ + sys_mbox_free(&msg->conn->recvmbox); + sys_mbox_set_invalid(&msg->conn->recvmbox); + } + err = ERR_OK; + if (!sys_mbox_valid(&msg->conn->acceptmbox)) { + err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE); + } + if (err == ERR_OK) { + msg->conn->state = NETCONN_LISTEN; + msg->conn->pcb.tcp = lpcb; + tcp_arg(msg->conn->pcb.tcp, msg->conn); + tcp_accept(msg->conn->pcb.tcp, accept_function); + } else { + /* since the old pcb is already deallocated, free lpcb now */ + tcp_close(lpcb); + msg->conn->pcb.tcp = NULL; + } + } + } + } else if (msg->conn->state == NETCONN_LISTEN) { + /* already listening, allow updating of the backlog */ + err = ERR_OK; + tcp_backlog_set(msg->conn->pcb.tcp, msg->msg.lb.backlog); + } else { + err = ERR_CONN; + } + } else { + err = ERR_ARG; + } + } else { + err = ERR_CONN; + } + msg->err = err; + TCPIP_APIMSG_ACK(msg); +} +#endif /* LWIP_TCP */ + +/** + * Send some data on a RAW or UDP pcb contained in a netconn + * Called from netconn_send + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_send(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + + err_t err = netconn_err(msg->conn); + if (err == ERR_OK) { + if (msg->conn->pcb.tcp != NULL) { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + if (ip_addr_isany(&msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) { + err = raw_send(msg->conn->pcb.raw, msg->msg.b->p); + } else { + err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr); + } + break; +#endif +#if LWIP_UDP + case NETCONN_UDP: +#if LWIP_CHECKSUM_ON_COPY + if (ip_addr_isany(&msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) { + err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p, + msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum); + } else { + err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p, + &msg->msg.b->addr, msg->msg.b->port, + msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum); + } +#else /* LWIP_CHECKSUM_ON_COPY */ + if (ip_addr_isany_val(msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) { + err = udp_send(msg->conn->pcb.udp, msg->msg.b->p); + } else { + err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port); + } +#endif /* LWIP_CHECKSUM_ON_COPY */ + break; +#endif /* LWIP_UDP */ + default: + err = ERR_CONN; + break; + } + } else { + err = ERR_CONN; + } + } + msg->err = err; + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * Indicate data has been received from a TCP pcb contained in a netconn + * Called from netconn_recv + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_recv(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + + msg->err = ERR_OK; + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { + size_t remaining = msg->msg.r.len; + do { + u16_t recved = (u16_t)((remaining > 0xffff) ? 0xffff : remaining); + tcp_recved(msg->conn->pcb.tcp, recved); + remaining -= recved; + } while (remaining != 0); + } + } + TCPIP_APIMSG_ACK(msg); +} + +#if TCP_LISTEN_BACKLOG +/** Indicate that a TCP pcb has been accepted + * Called from netconn_accept + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_accepted(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + + msg->err = ERR_OK; + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { + tcp_backlog_accepted(msg->conn->pcb.tcp); + } + } + TCPIP_APIMSG_ACK(msg); +} +#endif /* TCP_LISTEN_BACKLOG */ + +/** + * See if more data needs to be written from a previous call to netconn_write. + * Called initially from lwip_netconn_do_write. If the first call can't send all data + * (because of low memory or empty send-buffer), this function is called again + * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the + * blocking application thread (waiting in netconn_write) is released. + * + * @param conn netconn (that is currently in state NETCONN_WRITE) to process + * @return ERR_OK + * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished + */ +static err_t +lwip_netconn_do_writemore(struct netconn *conn WRITE_DELAYED_PARAM) +{ + err_t err; + const void *dataptr; + u16_t len, available; + u8_t write_finished = 0; + size_t diff; + u8_t dontblock; + u8_t apiflags; + u8_t write_more; + + LWIP_ASSERT("conn != NULL", conn != NULL); + LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE)); + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL); + LWIP_ASSERT("conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len", + conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len); + LWIP_ASSERT("conn->current_msg->msg.w.vector_cnt > 0", conn->current_msg->msg.w.vector_cnt > 0); + + apiflags = conn->current_msg->msg.w.apiflags; + dontblock = netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK); + +#if LWIP_SO_SNDTIMEO + if ((conn->send_timeout != 0) && + ((s32_t)(sys_now() - conn->current_msg->msg.w.time_started) >= conn->send_timeout)) { + write_finished = 1; + if (conn->current_msg->msg.w.offset == 0) { + /* nothing has been written */ + err = ERR_WOULDBLOCK; + } else { + /* partial write */ + err = ERR_OK; + } + } else +#endif /* LWIP_SO_SNDTIMEO */ + { + do { + dataptr = (const u8_t *)conn->current_msg->msg.w.vector->ptr + conn->current_msg->msg.w.vector_off; + diff = conn->current_msg->msg.w.vector->len - conn->current_msg->msg.w.vector_off; + if (diff > 0xffffUL) { /* max_u16_t */ + len = 0xffff; + apiflags |= TCP_WRITE_FLAG_MORE; + } else { + len = (u16_t)diff; + } + available = tcp_sndbuf(conn->pcb.tcp); + if (available < len) { + /* don't try to write more than sendbuf */ + len = available; + if (dontblock) { + if (!len) { + /* set error according to partial write or not */ + err = (conn->current_msg->msg.w.offset == 0) ? ERR_WOULDBLOCK : ERR_OK; + goto err_mem; + } + } else { + apiflags |= TCP_WRITE_FLAG_MORE; + } + } + LWIP_ASSERT("lwip_netconn_do_writemore: invalid length!", + ((conn->current_msg->msg.w.vector_off + len) <= conn->current_msg->msg.w.vector->len)); + /* we should loop around for more sending in the following cases: + 1) We couldn't finish the current vector because of 16-bit size limitations. + tcp_write() and tcp_sndbuf() both are limited to 16-bit sizes + 2) We are sending the remainder of the current vector and have more */ + if ((len == 0xffff && diff > 0xffffUL) || + (len == (u16_t)diff && conn->current_msg->msg.w.vector_cnt > 1)) { + write_more = 1; + apiflags |= TCP_WRITE_FLAG_MORE; + } else { + write_more = 0; + } + err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags); + if (err == ERR_OK) { + conn->current_msg->msg.w.offset += len; + conn->current_msg->msg.w.vector_off += len; + /* check if current vector is finished */ + if (conn->current_msg->msg.w.vector_off == conn->current_msg->msg.w.vector->len) { + conn->current_msg->msg.w.vector_cnt--; + /* if we have additional vectors, move on to them */ + if (conn->current_msg->msg.w.vector_cnt > 0) { + conn->current_msg->msg.w.vector++; + conn->current_msg->msg.w.vector_off = 0; + } + } + } + } while (write_more && err == ERR_OK); + /* if OK or memory error, check available space */ + if ((err == ERR_OK) || (err == ERR_MEM)) { +err_mem: + if (dontblock && (conn->current_msg->msg.w.offset < conn->current_msg->msg.w.len)) { + /* non-blocking write did not write everything: mark the pcb non-writable + and let poll_tcp check writable space to mark the pcb writable again */ + API_EVENT(conn, NETCONN_EVT_SENDMINUS, 0); + conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE; + } else if ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) || + (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT)) { + /* The queued byte- or pbuf-count exceeds the configured low-water limit, + let select mark this pcb as non-writable. */ + API_EVENT(conn, NETCONN_EVT_SENDMINUS, 0); + } + } + + if (err == ERR_OK) { + err_t out_err; + if ((conn->current_msg->msg.w.offset == conn->current_msg->msg.w.len) || dontblock) { + /* return sent length (caller reads length from msg.w.offset) */ + write_finished = 1; + } + out_err = tcp_output(conn->pcb.tcp); + if (out_err == ERR_RTE) { + /* If tcp_output fails because no route is found, + don't try writing any more but return the error + to the application thread. */ + err = out_err; + write_finished = 1; + } + } else if (err == ERR_MEM) { + /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called. + For blocking sockets, we do NOT return to the application + thread, since ERR_MEM is only a temporary error! Non-blocking + will remain non-writable until sent_tcp/poll_tcp is called */ + + /* tcp_write returned ERR_MEM, try tcp_output anyway */ + err_t out_err = tcp_output(conn->pcb.tcp); + if (out_err == ERR_RTE) { + /* If tcp_output fails because no route is found, + don't try writing any more but return the error + to the application thread. */ + err = out_err; + write_finished = 1; + } else if (dontblock) { + /* non-blocking write is done on ERR_MEM, set error according + to partial write or not */ + err = (conn->current_msg->msg.w.offset == 0) ? ERR_WOULDBLOCK : ERR_OK; + write_finished = 1; + } + } else { + /* On errors != ERR_MEM, we don't try writing any more but return + the error to the application thread. */ + write_finished = 1; + } + } + if (write_finished) { + /* everything was written: set back connection state + and back to application task */ + sys_sem_t *op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); + conn->current_msg->err = err; + conn->current_msg = NULL; + conn->state = NETCONN_NONE; +#if LWIP_TCPIP_CORE_LOCKING + if (delayed) +#endif + { + sys_sem_signal(op_completed_sem); + } + } +#if LWIP_TCPIP_CORE_LOCKING + else { + return ERR_MEM; + } +#endif + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Send some data on a TCP pcb contained in a netconn + * Called from netconn_write + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_write(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + + err_t err = netconn_err(msg->conn); + if (err == ERR_OK) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { +#if LWIP_TCP + if (msg->conn->state != NETCONN_NONE) { + /* netconn is connecting, closing or in blocking write */ + err = ERR_INPROGRESS; + } else if (msg->conn->pcb.tcp != NULL) { + msg->conn->state = NETCONN_WRITE; + /* set all the variables used by lwip_netconn_do_writemore */ + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL); + LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0); + msg->conn->current_msg = msg; +#if LWIP_TCPIP_CORE_LOCKING + if (lwip_netconn_do_writemore(msg->conn, 0) != ERR_OK) { + LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state != NETCONN_WRITE); + } +#else /* LWIP_TCPIP_CORE_LOCKING */ + lwip_netconn_do_writemore(msg->conn); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + /* for both cases: if lwip_netconn_do_writemore was called, don't ACK the APIMSG + since lwip_netconn_do_writemore ACKs it! */ + return; + } else { + err = ERR_CONN; + } +#else /* LWIP_TCP */ + err = ERR_VAL; +#endif /* LWIP_TCP */ +#if (LWIP_UDP || LWIP_RAW) + } else { + err = ERR_VAL; +#endif /* (LWIP_UDP || LWIP_RAW) */ + } + } + msg->err = err; + TCPIP_APIMSG_ACK(msg); +} + +/** + * Return a connection's local or remote address + * Called from netconn_getaddr + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_getaddr(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + + if (msg->conn->pcb.ip != NULL) { + if (msg->msg.ad.local) { + ip_addr_copy(API_EXPR_DEREF(msg->msg.ad.ipaddr), + msg->conn->pcb.ip->local_ip); + } else { + ip_addr_copy(API_EXPR_DEREF(msg->msg.ad.ipaddr), + msg->conn->pcb.ip->remote_ip); + } + + msg->err = ERR_OK; + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + if (msg->msg.ad.local) { + API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.raw->protocol; + } else { + /* return an error as connecting is only a helper for upper layers */ + msg->err = ERR_CONN; + } + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + if (msg->msg.ad.local) { + API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->local_port; + } else { + if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) { + msg->err = ERR_CONN; + } else { + API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port; + } + } + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + if ((msg->msg.ad.local == 0) && + ((msg->conn->pcb.tcp->state == CLOSED) || (msg->conn->pcb.tcp->state == LISTEN))) { + /* pcb is not connected and remote name is requested */ + msg->err = ERR_CONN; + } else { + API_EXPR_DEREF(msg->msg.ad.port) = (msg->msg.ad.local ? msg->conn->pcb.tcp->local_port : msg->conn->pcb.tcp->remote_port); + } + break; +#endif /* LWIP_TCP */ + default: + LWIP_ASSERT("invalid netconn_type", 0); + break; + } + } else { + msg->err = ERR_CONN; + } + TCPIP_APIMSG_ACK(msg); +} + +/** + * Close or half-shutdown a TCP pcb contained in a netconn + * Called from netconn_close + * In contrast to closing sockets, the netconn is not deallocated. + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_close(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + +#if LWIP_TCP + enum netconn_state state = msg->conn->state; + /* First check if this is a TCP netconn and if it is in a correct state + (LISTEN doesn't support half shutdown) */ + if ((msg->conn->pcb.tcp != NULL) && + (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) && + ((msg->msg.sd.shut == NETCONN_SHUT_RDWR) || (state != NETCONN_LISTEN))) { + /* Check if we are in a connected state */ + if (state == NETCONN_CONNECT) { + /* TCP connect in progress: cannot shutdown */ + msg->err = ERR_CONN; + } else if (state == NETCONN_WRITE) { +#if LWIP_NETCONN_FULLDUPLEX + if (msg->msg.sd.shut & NETCONN_SHUT_WR) { + /* close requested, abort running write */ + sys_sem_t *write_completed_sem; + LWIP_ASSERT("msg->conn->current_msg != NULL", msg->conn->current_msg != NULL); + write_completed_sem = LWIP_API_MSG_SEM(msg->conn->current_msg); + msg->conn->current_msg->err = ERR_CLSD; + msg->conn->current_msg = NULL; + msg->conn->state = NETCONN_NONE; + state = NETCONN_NONE; + sys_sem_signal(write_completed_sem); + } else { + LWIP_ASSERT("msg->msg.sd.shut == NETCONN_SHUT_RD", msg->msg.sd.shut == NETCONN_SHUT_RD); + /* In this case, let the write continue and do not interfere with + conn->current_msg or conn->state! */ + msg->err = tcp_shutdown(msg->conn->pcb.tcp, 1, 0); + } + } + if (state == NETCONN_NONE) { +#else /* LWIP_NETCONN_FULLDUPLEX */ + msg->err = ERR_INPROGRESS; + } else { +#endif /* LWIP_NETCONN_FULLDUPLEX */ + if (msg->msg.sd.shut & NETCONN_SHUT_RD) { +#if LWIP_NETCONN_FULLDUPLEX + /* Mark mboxes invalid */ + netconn_mark_mbox_invalid(msg->conn); +#else /* LWIP_NETCONN_FULLDUPLEX */ + netconn_drain(msg->conn); +#endif /* LWIP_NETCONN_FULLDUPLEX */ + } + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL); + msg->conn->state = NETCONN_CLOSE; + msg->conn->current_msg = msg; +#if LWIP_TCPIP_CORE_LOCKING + if (lwip_netconn_do_close_internal(msg->conn, 0) != ERR_OK) { + LWIP_ASSERT("state!", msg->conn->state == NETCONN_CLOSE); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE); + } +#else /* LWIP_TCPIP_CORE_LOCKING */ + lwip_netconn_do_close_internal(msg->conn); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + /* for tcp netconns, lwip_netconn_do_close_internal ACKs the message */ + return; + } + } else +#endif /* LWIP_TCP */ + { + msg->err = ERR_CONN; + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) +/** + * Join multicast groups for UDP netconns. + * Called from netconn_join_leave_group + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_join_leave_group(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + + msg->err = ERR_CONN; + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) { +#if LWIP_UDP +#if LWIP_IPV6 && LWIP_IPV6_MLD + if (NETCONNTYPE_ISIPV6(msg->conn->type)) { + if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { + msg->err = mld6_joingroup(ip_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)), + ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr))); + } else { + msg->err = mld6_leavegroup(ip_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)), + ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr))); + } + } else +#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ + { +#if LWIP_IGMP + if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { + msg->err = igmp_joingroup(ip_2_ip4(API_EXPR_REF(msg->msg.jl.netif_addr)), + ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr))); + } else { + msg->err = igmp_leavegroup(ip_2_ip4(API_EXPR_REF(msg->msg.jl.netif_addr)), + ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr))); + } +#endif /* LWIP_IGMP */ + } +#endif /* LWIP_UDP */ +#if (LWIP_TCP || LWIP_RAW) + } else { + msg->err = ERR_VAL; +#endif /* (LWIP_TCP || LWIP_RAW) */ + } + } + TCPIP_APIMSG_ACK(msg); +} +/** + * Join multicast groups for UDP netconns. + * Called from netconn_join_leave_group_netif + * + * @param m the api_msg pointing to the connection + */ +void +lwip_netconn_do_join_leave_group_netif(void *m) +{ + struct api_msg *msg = (struct api_msg *)m; + struct netif *netif; + + netif = netif_get_by_index(msg->msg.jl.if_idx); + if (netif == NULL) { + msg->err = ERR_IF; + goto done; + } + + msg->err = ERR_CONN; + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) { +#if LWIP_UDP +#if LWIP_IPV6 && LWIP_IPV6_MLD + if (NETCONNTYPE_ISIPV6(msg->conn->type)) { + if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { + msg->err = mld6_joingroup_netif(netif, + ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr))); + } else { + msg->err = mld6_leavegroup_netif(netif, + ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr))); + } + } else +#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ + { +#if LWIP_IGMP + if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { + msg->err = igmp_joingroup_netif(netif, + ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr))); + } else { + msg->err = igmp_leavegroup_netif(netif, + ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr))); + } +#endif /* LWIP_IGMP */ + } +#endif /* LWIP_UDP */ +#if (LWIP_TCP || LWIP_RAW) + } else { + msg->err = ERR_VAL; +#endif /* (LWIP_TCP || LWIP_RAW) */ + } + } + +done: + TCPIP_APIMSG_ACK(msg); +} +#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */ + +#if LWIP_DNS +/** + * Callback function that is called when DNS name is resolved + * (or on timeout). A waiting application thread is waked up by + * signaling the semaphore. + */ +static void +lwip_netconn_do_dns_found(const char *name, const ip_addr_t *ipaddr, void *arg) +{ + struct dns_api_msg *msg = (struct dns_api_msg *)arg; + + /* we trust the internal implementation to be correct :-) */ + LWIP_UNUSED_ARG(name); + + if (ipaddr == NULL) { + /* timeout or memory error */ + API_EXPR_DEREF(msg->err) = ERR_VAL; + } else { + /* address was resolved */ + API_EXPR_DEREF(msg->err) = ERR_OK; + API_EXPR_DEREF(msg->addr) = *ipaddr; + } + /* wake up the application task waiting in netconn_gethostbyname */ + sys_sem_signal(API_EXPR_REF_SEM(msg->sem)); +} + +/** + * Execute a DNS query + * Called from netconn_gethostbyname + * + * @param arg the dns_api_msg pointing to the query + */ +void +lwip_netconn_do_gethostbyname(void *arg) +{ + struct dns_api_msg *msg = (struct dns_api_msg *)arg; + u8_t addrtype = +#if LWIP_IPV4 && LWIP_IPV6 + msg->dns_addrtype; +#else + LWIP_DNS_ADDRTYPE_DEFAULT; +#endif + + API_EXPR_DEREF(msg->err) = dns_gethostbyname_addrtype(msg->name, + API_EXPR_REF(msg->addr), lwip_netconn_do_dns_found, msg, addrtype); +#if LWIP_TCPIP_CORE_LOCKING + /* For core locking, only block if we need to wait for answer/timeout */ + if (API_EXPR_DEREF(msg->err) == ERR_INPROGRESS) { + UNLOCK_TCPIP_CORE(); + sys_sem_wait(API_EXPR_REF_SEM(msg->sem)); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("do_gethostbyname still in progress!!", API_EXPR_DEREF(msg->err) != ERR_INPROGRESS); + } +#else /* LWIP_TCPIP_CORE_LOCKING */ + if (API_EXPR_DEREF(msg->err) != ERR_INPROGRESS) { + /* on error or immediate success, wake up the application + * task waiting in netconn_gethostbyname */ + sys_sem_signal(API_EXPR_REF_SEM(msg->sem)); + } +#endif /* LWIP_TCPIP_CORE_LOCKING */ +} +#endif /* LWIP_DNS */ + +#endif /* LWIP_NETCONN */ diff --git a/lib/lwip/api/err.c b/lib/lwip/api/err.c new file mode 100644 index 0000000000..dd2b62dab1 --- /dev/null +++ b/lib/lwip/api/err.c @@ -0,0 +1,115 @@ +/** + * @file + * Error Management module + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/err.h" +#include "lwip/def.h" +#include "lwip/sys.h" + +#include "lwip/errno.h" + +#if !NO_SYS +/** Table to quickly map an lwIP error (err_t) to a socket error + * by using -err as an index */ +static const int err_to_errno_table[] = { + 0, /* ERR_OK 0 No error, everything OK. */ + ENOMEM, /* ERR_MEM -1 Out of memory error. */ + ENOBUFS, /* ERR_BUF -2 Buffer error. */ + EWOULDBLOCK, /* ERR_TIMEOUT -3 Timeout */ + EHOSTUNREACH, /* ERR_RTE -4 Routing problem. */ + EINPROGRESS, /* ERR_INPROGRESS -5 Operation in progress */ + EINVAL, /* ERR_VAL -6 Illegal value. */ + EWOULDBLOCK, /* ERR_WOULDBLOCK -7 Operation would block. */ + EADDRINUSE, /* ERR_USE -8 Address in use. */ + EALREADY, /* ERR_ALREADY -9 Already connecting. */ + EISCONN, /* ERR_ISCONN -10 Conn already established.*/ + ENOTCONN, /* ERR_CONN -11 Not connected. */ + -1, /* ERR_IF -12 Low-level netif error */ + ECONNABORTED, /* ERR_ABRT -13 Connection aborted. */ + ECONNRESET, /* ERR_RST -14 Connection reset. */ + ENOTCONN, /* ERR_CLSD -15 Connection closed. */ + EIO /* ERR_ARG -16 Illegal argument. */ +}; + +int +err_to_errno(err_t err) +{ + if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_to_errno_table))) { + return EIO; + } + return err_to_errno_table[-err]; +} +#endif /* !NO_SYS */ + +#ifdef LWIP_DEBUG + +static const char *err_strerr[] = { + "Ok.", /* ERR_OK 0 */ + "Out of memory error.", /* ERR_MEM -1 */ + "Buffer error.", /* ERR_BUF -2 */ + "Timeout.", /* ERR_TIMEOUT -3 */ + "Routing problem.", /* ERR_RTE -4 */ + "Operation in progress.", /* ERR_INPROGRESS -5 */ + "Illegal value.", /* ERR_VAL -6 */ + "Operation would block.", /* ERR_WOULDBLOCK -7 */ + "Address in use.", /* ERR_USE -8 */ + "Already connecting.", /* ERR_ALREADY -9 */ + "Already connected.", /* ERR_ISCONN -10 */ + "Not connected.", /* ERR_CONN -11 */ + "Low-level netif error.", /* ERR_IF -12 */ + "Connection aborted.", /* ERR_ABRT -13 */ + "Connection reset.", /* ERR_RST -14 */ + "Connection closed.", /* ERR_CLSD -15 */ + "Illegal argument." /* ERR_ARG -16 */ +}; + +/** + * Convert an lwip internal error to a string representation. + * + * @param err an lwip internal err_t + * @return a string representation for err + */ +const char * +lwip_strerr(err_t err) +{ + if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_strerr))) { + return "Unknown error."; + } + return err_strerr[-err]; +} + +#endif /* LWIP_DEBUG */ diff --git a/lib/lwip/api/if_api.c b/lib/lwip/api/if_api.c new file mode 100644 index 0000000000..d274c323af --- /dev/null +++ b/lib/lwip/api/if_api.c @@ -0,0 +1,102 @@ +/** + * @file + * Interface Identification APIs from: + * RFC 3493: Basic Socket Interface Extensions for IPv6 + * Section 4: Interface Identification + * + * @defgroup if_api Interface Identification API + * @ingroup socket + */ + +/* + * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. joel.cunningham@garmin.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Joel Cunningham joel.cunningham@me.com + * + */ +#include "lwip/opt.h" + +#if LWIP_SOCKET + +#include "lwip/errno.h" +#include "lwip/if_api.h" +#include "lwip/netifapi.h" +#include "lwip/priv/sockets_priv.h" + +/** + * @ingroup if_api + * Maps an interface index to its corresponding name. + * @param ifindex interface index + * @param ifname shall point to a buffer of at least {IF_NAMESIZE} bytes + * @return If ifindex is an interface index, then the function shall return the + * value supplied in ifname, which points to a buffer now containing the interface name. + * Otherwise, the function shall return a NULL pointer. + */ +char * +lwip_if_indextoname(unsigned int ifindex, char *ifname) +{ +#if LWIP_NETIF_API + if (ifindex <= 0xff) { + err_t err = netifapi_netif_index_to_name((u8_t)ifindex, ifname); + if (!err && ifname[0] != '\0') { + return ifname; + } + } +#else /* LWIP_NETIF_API */ + LWIP_UNUSED_ARG(ifindex); + LWIP_UNUSED_ARG(ifname); +#endif /* LWIP_NETIF_API */ + set_errno(ENXIO); + return NULL; +} + +/** + * @ingroup if_api + * Returns the interface index corresponding to name ifname. + * @param ifname Interface name + * @return The corresponding index if ifname is the name of an interface; + * otherwise, zero. + */ +unsigned int +lwip_if_nametoindex(const char *ifname) +{ +#if LWIP_NETIF_API + err_t err; + u8_t idx; + + err = netifapi_netif_name_to_index(ifname, &idx); + if (!err) { + return idx; + } +#else /* LWIP_NETIF_API */ + LWIP_UNUSED_ARG(ifname); +#endif /* LWIP_NETIF_API */ + return 0; /* invalid index */ +} + +#endif /* LWIP_SOCKET */ diff --git a/lib/lwip/api/netbuf.c b/lib/lwip/api/netbuf.c new file mode 100644 index 0000000000..8f5be9e2b2 --- /dev/null +++ b/lib/lwip/api/netbuf.c @@ -0,0 +1,250 @@ +/** + * @file + * Network buffer management + * + * @defgroup netbuf Network buffers + * @ingroup netconn + * Network buffer descriptor for @ref netconn. Based on @ref pbuf internally + * to avoid copying data around.<br> + * Buffers must not be shared across multiple threads, all functions except + * netbuf_new() and netbuf_delete() are not thread-safe. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/netbuf.h" +#include "lwip/memp.h" + +#include <string.h> + +/** + * @ingroup netbuf + * Create (allocate) and initialize a new netbuf. + * The netbuf doesn't yet contain a packet buffer! + * + * @return a pointer to a new netbuf + * NULL on lack of memory + */ +struct +netbuf *netbuf_new(void) +{ + struct netbuf *buf; + + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf != NULL) { + memset(buf, 0, sizeof(struct netbuf)); + } + return buf; +} + +/** + * @ingroup netbuf + * Deallocate a netbuf allocated by netbuf_new(). + * + * @param buf pointer to a netbuf allocated by netbuf_new() + */ +void +netbuf_delete(struct netbuf *buf) +{ + if (buf != NULL) { + if (buf->p != NULL) { + pbuf_free(buf->p); + buf->p = buf->ptr = NULL; + } + memp_free(MEMP_NETBUF, buf); + } +} + +/** + * @ingroup netbuf + * Allocate memory for a packet buffer for a given netbuf. + * + * @param buf the netbuf for which to allocate a packet buffer + * @param size the size of the packet buffer to allocate + * @return pointer to the allocated memory + * NULL if no memory could be allocated + */ +void * +netbuf_alloc(struct netbuf *buf, u16_t size) +{ + LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;); + + /* Deallocate any previously allocated memory. */ + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM); + if (buf->p == NULL) { + return NULL; + } + LWIP_ASSERT("check that first pbuf can hold size", + (buf->p->len >= size)); + buf->ptr = buf->p; + return buf->p->payload; +} + +/** + * @ingroup netbuf + * Free the packet buffer included in a netbuf + * + * @param buf pointer to the netbuf which contains the packet buffer to free + */ +void +netbuf_free(struct netbuf *buf) +{ + LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;); + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = buf->ptr = NULL; +#if LWIP_CHECKSUM_ON_COPY + buf->flags = 0; + buf->toport_chksum = 0; +#endif /* LWIP_CHECKSUM_ON_COPY */ +} + +/** + * @ingroup netbuf + * Let a netbuf reference existing (non-volatile) data. + * + * @param buf netbuf which should reference the data + * @param dataptr pointer to the data to reference + * @param size size of the data + * @return ERR_OK if data is referenced + * ERR_MEM if data couldn't be referenced due to lack of memory + */ +err_t +netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size) +{ + LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;); + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF); + if (buf->p == NULL) { + buf->ptr = NULL; + return ERR_MEM; + } + ((struct pbuf_rom *)buf->p)->payload = dataptr; + buf->p->len = buf->p->tot_len = size; + buf->ptr = buf->p; + return ERR_OK; +} + +/** + * @ingroup netbuf + * Chain one netbuf to another (@see pbuf_chain) + * + * @param head the first netbuf + * @param tail netbuf to chain after head, freed by this function, may not be reference after returning + */ +void +netbuf_chain(struct netbuf *head, struct netbuf *tail) +{ + LWIP_ERROR("netbuf_chain: invalid head", (head != NULL), return;); + LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;); + pbuf_cat(head->p, tail->p); + head->ptr = head->p; + memp_free(MEMP_NETBUF, tail); +} + +/** + * @ingroup netbuf + * Get the data pointer and length of the data inside a netbuf. + * + * @param buf netbuf to get the data from + * @param dataptr pointer to a void pointer where to store the data pointer + * @param len pointer to an u16_t where the length of the data is stored + * @return ERR_OK if the information was retrieved, + * ERR_BUF on error. + */ +err_t +netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len) +{ + LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;); + LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;); + LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;); + + if (buf->ptr == NULL) { + return ERR_BUF; + } + *dataptr = buf->ptr->payload; + *len = buf->ptr->len; + return ERR_OK; +} + +/** + * @ingroup netbuf + * Move the current data pointer of a packet buffer contained in a netbuf + * to the next part. + * The packet buffer itself is not modified. + * + * @param buf the netbuf to modify + * @return -1 if there is no next part + * 1 if moved to the next part but now there is no next part + * 0 if moved to the next part and there are still more parts + */ +s8_t +netbuf_next(struct netbuf *buf) +{ + LWIP_ERROR("netbuf_next: invalid buf", (buf != NULL), return -1;); + if (buf->ptr->next == NULL) { + return -1; + } + buf->ptr = buf->ptr->next; + if (buf->ptr->next == NULL) { + return 1; + } + return 0; +} + +/** + * @ingroup netbuf + * Move the current data pointer of a packet buffer contained in a netbuf + * to the beginning of the packet. + * The packet buffer itself is not modified. + * + * @param buf the netbuf to modify + */ +void +netbuf_first(struct netbuf *buf) +{ + LWIP_ERROR("netbuf_first: invalid buf", (buf != NULL), return;); + buf->ptr = buf->p; +} + +#endif /* LWIP_NETCONN */ diff --git a/lib/lwip/api/netdb.c b/lib/lwip/api/netdb.c new file mode 100644 index 0000000000..e07ab04998 --- /dev/null +++ b/lib/lwip/api/netdb.c @@ -0,0 +1,422 @@ +/** + * @file + * API functions for name resolving + * + * @defgroup netdbapi NETDB API + * @ingroup socket + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt + * + */ + +#include "lwip/netdb.h" + +#if LWIP_DNS && LWIP_SOCKET + +#include "lwip/err.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/ip_addr.h" +#include "lwip/api.h" +#include "lwip/dns.h" + +#include <string.h> /* memset */ +#include <stdlib.h> /* atoi */ + +/** helper struct for gethostbyname_r to access the char* buffer */ +struct gethostbyname_r_helper { + ip_addr_t *addr_list[2]; + ip_addr_t addr; + char *aliases; +}; + +/** h_errno is exported in netdb.h for access by applications. */ +#if LWIP_DNS_API_DECLARE_H_ERRNO +int h_errno; +#endif /* LWIP_DNS_API_DECLARE_H_ERRNO */ + +/** LWIP_DNS_API_HOSTENT_STORAGE: if set to 0 (default), lwip_gethostbyname() + * returns the same global variabe for all calls (in all threads). + * When set to 1, your port should provide a function + * struct hostent* sys_thread_hostent( struct hostent* h); + * which have to do a copy of "h" and return a pointer ont the "per-thread" + * copy. + */ +#ifndef LWIP_DNS_API_HOSTENT_STORAGE +#define LWIP_DNS_API_HOSTENT_STORAGE 0 +#endif + +/* define "hostent" variables storage */ +#if LWIP_DNS_API_HOSTENT_STORAGE +#define HOSTENT_STORAGE +#else +#define HOSTENT_STORAGE static +#endif /* LWIP_DNS_API_STATIC_HOSTENT */ + +/** + * Returns an entry containing addresses of address family AF_INET + * for the host with name name. + * Due to dns_gethostbyname limitations, only one address is returned. + * + * @param name the hostname to resolve + * @return an entry containing addresses of address family AF_INET + * for the host with name name + */ +struct hostent * +lwip_gethostbyname(const char *name) +{ + err_t err; + ip_addr_t addr; + + /* buffer variables for lwip_gethostbyname() */ + HOSTENT_STORAGE struct hostent s_hostent; + HOSTENT_STORAGE char *s_aliases; + HOSTENT_STORAGE ip_addr_t s_hostent_addr; + HOSTENT_STORAGE ip_addr_t *s_phostent_addr[2]; + HOSTENT_STORAGE char s_hostname[DNS_MAX_NAME_LENGTH + 1]; + + /* query host IP address */ + err = netconn_gethostbyname(name, &addr); + if (err != ERR_OK) { + LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err)); + h_errno = HOST_NOT_FOUND; + return NULL; + } + + /* fill hostent */ + s_hostent_addr = addr; + s_phostent_addr[0] = &s_hostent_addr; + s_phostent_addr[1] = NULL; + strncpy(s_hostname, name, DNS_MAX_NAME_LENGTH); + s_hostname[DNS_MAX_NAME_LENGTH] = 0; + s_hostent.h_name = s_hostname; + s_aliases = NULL; + s_hostent.h_aliases = &s_aliases; + s_hostent.h_addrtype = AF_INET; + s_hostent.h_length = sizeof(ip_addr_t); + s_hostent.h_addr_list = (char **)&s_phostent_addr; + +#if DNS_DEBUG + /* dump hostent */ + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_name == %s\n", s_hostent.h_name)); + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases == %p\n", (void *)s_hostent.h_aliases)); + /* h_aliases are always empty */ + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addrtype == %d\n", s_hostent.h_addrtype)); + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_length == %d\n", s_hostent.h_length)); + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list == %p\n", (void *)s_hostent.h_addr_list)); + if (s_hostent.h_addr_list != NULL) { + u8_t idx; + for (idx = 0; s_hostent.h_addr_list[idx]; idx++) { + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i]-> == %s\n", idx, ipaddr_ntoa(s_phostent_addr[idx]))); + } + } +#endif /* DNS_DEBUG */ + +#if LWIP_DNS_API_HOSTENT_STORAGE + /* this function should return the "per-thread" hostent after copy from s_hostent */ + return sys_thread_hostent(&s_hostent); +#else + return &s_hostent; +#endif /* LWIP_DNS_API_HOSTENT_STORAGE */ +} + +/** + * Thread-safe variant of lwip_gethostbyname: instead of using a static + * buffer, this function takes buffer and errno pointers as arguments + * and uses these for the result. + * + * @param name the hostname to resolve + * @param ret pre-allocated struct where to store the result + * @param buf pre-allocated buffer where to store additional data + * @param buflen the size of buf + * @param result pointer to a hostent pointer that is set to ret on success + * and set to zero on error + * @param h_errnop pointer to an int where to store errors (instead of modifying + * the global h_errno) + * @return 0 on success, non-zero on error, additional error information + * is stored in *h_errnop instead of h_errno to be thread-safe + */ +int +lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf, + size_t buflen, struct hostent **result, int *h_errnop) +{ + err_t err; + struct gethostbyname_r_helper *h; + char *hostname; + size_t namelen; + int lh_errno; + + if (h_errnop == NULL) { + /* ensure h_errnop is never NULL */ + h_errnop = &lh_errno; + } + + if (result == NULL) { + /* not all arguments given */ + *h_errnop = EINVAL; + return -1; + } + /* first thing to do: set *result to nothing */ + *result = NULL; + if ((name == NULL) || (ret == NULL) || (buf == NULL)) { + /* not all arguments given */ + *h_errnop = EINVAL; + return -1; + } + + namelen = strlen(name); + if (buflen < (sizeof(struct gethostbyname_r_helper) + LWIP_MEM_ALIGN_BUFFER(namelen + 1))) { + /* buf can't hold the data needed + a copy of name */ + *h_errnop = ERANGE; + return -1; + } + + h = (struct gethostbyname_r_helper *)LWIP_MEM_ALIGN(buf); + hostname = ((char *)h) + sizeof(struct gethostbyname_r_helper); + + /* query host IP address */ + err = netconn_gethostbyname(name, &h->addr); + if (err != ERR_OK) { + LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err)); + *h_errnop = HOST_NOT_FOUND; + return -1; + } + + /* copy the hostname into buf */ + MEMCPY(hostname, name, namelen); + hostname[namelen] = 0; + + /* fill hostent */ + h->addr_list[0] = &h->addr; + h->addr_list[1] = NULL; + h->aliases = NULL; + ret->h_name = hostname; + ret->h_aliases = &h->aliases; + ret->h_addrtype = AF_INET; + ret->h_length = sizeof(ip_addr_t); + ret->h_addr_list = (char **)&h->addr_list; + + /* set result != NULL */ + *result = ret; + + /* return success */ + return 0; +} + +/** + * Frees one or more addrinfo structures returned by getaddrinfo(), along with + * any additional storage associated with those structures. If the ai_next field + * of the structure is not null, the entire list of structures is freed. + * + * @param ai struct addrinfo to free + */ +void +lwip_freeaddrinfo(struct addrinfo *ai) +{ + struct addrinfo *next; + + while (ai != NULL) { + next = ai->ai_next; + memp_free(MEMP_NETDB, ai); + ai = next; + } +} + +/** + * Translates the name of a service location (for example, a host name) and/or + * a service name and returns a set of socket addresses and associated + * information to be used in creating a socket with which to address the + * specified service. + * Memory for the result is allocated internally and must be freed by calling + * lwip_freeaddrinfo()! + * + * Due to a limitation in dns_gethostbyname, only the first address of a + * host is returned. + * Also, service names are not supported (only port numbers)! + * + * @param nodename descriptive name or address string of the host + * (may be NULL -> local address) + * @param servname port number as string of NULL + * @param hints structure containing input values that set socktype and protocol + * @param res pointer to a pointer where to store the result (set to NULL on failure) + * @return 0 on success, non-zero on failure + * + * @todo: implement AI_V4MAPPED, AI_ADDRCONFIG + */ +int +lwip_getaddrinfo(const char *nodename, const char *servname, + const struct addrinfo *hints, struct addrinfo **res) +{ + err_t err; + ip_addr_t addr; + struct addrinfo *ai; + struct sockaddr_storage *sa = NULL; + int port_nr = 0; + size_t total_size; + size_t namelen = 0; + int ai_family; + + if (res == NULL) { + return EAI_FAIL; + } + *res = NULL; + if ((nodename == NULL) && (servname == NULL)) { + return EAI_NONAME; + } + + if (hints != NULL) { + ai_family = hints->ai_family; + if ((ai_family != AF_UNSPEC) +#if LWIP_IPV4 + && (ai_family != AF_INET) +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 + && (ai_family != AF_INET6) +#endif /* LWIP_IPV6 */ + ) { + return EAI_FAMILY; + } + } else { + ai_family = AF_UNSPEC; + } + + if (servname != NULL) { + /* service name specified: convert to port number + * @todo?: currently, only ASCII integers (port numbers) are supported (AI_NUMERICSERV)! */ + port_nr = atoi(servname); + if (port_nr == 0 && (servname[0] != '0')) { + /* atoi failed - service was not numeric */ + return EAI_SERVICE; + } + if ((port_nr < 0) || (port_nr > 0xffff)) { + return EAI_SERVICE; + } + } + + if (nodename != NULL) { + /* service location specified, try to resolve */ + if ((hints != NULL) && (hints->ai_flags & AI_NUMERICHOST)) { + /* no DNS lookup, just parse for an address string */ + if (!ipaddr_aton(nodename, &addr)) { + return EAI_NONAME; + } +#if LWIP_IPV4 && LWIP_IPV6 + if ((IP_IS_V6_VAL(addr) && ai_family == AF_INET) || + (IP_IS_V4_VAL(addr) && ai_family == AF_INET6)) { + return EAI_NONAME; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + } else { +#if LWIP_IPV4 && LWIP_IPV6 + /* AF_UNSPEC: prefer IPv4 */ + u8_t type = NETCONN_DNS_IPV4_IPV6; + if (ai_family == AF_INET) { + type = NETCONN_DNS_IPV4; + } else if (ai_family == AF_INET6) { + type = NETCONN_DNS_IPV6; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + err = netconn_gethostbyname_addrtype(nodename, &addr, type); + if (err != ERR_OK) { + return EAI_FAIL; + } + } + } else { + /* service location specified, use loopback address */ + if ((hints != NULL) && (hints->ai_flags & AI_PASSIVE)) { + ip_addr_set_any_val(ai_family == AF_INET6, addr); + } else { + ip_addr_set_loopback_val(ai_family == AF_INET6, addr); + } + } + + total_size = sizeof(struct addrinfo) + sizeof(struct sockaddr_storage); + if (nodename != NULL) { + namelen = strlen(nodename); + if (namelen > DNS_MAX_NAME_LENGTH) { + /* invalid name length */ + return EAI_FAIL; + } + LWIP_ASSERT("namelen is too long", total_size + namelen + 1 > total_size); + total_size += namelen + 1; + } + /* If this fails, please report to lwip-devel! :-) */ + LWIP_ASSERT("total_size <= NETDB_ELEM_SIZE: please report this!", + total_size <= NETDB_ELEM_SIZE); + ai = (struct addrinfo *)memp_malloc(MEMP_NETDB); + if (ai == NULL) { + return EAI_MEMORY; + } + memset(ai, 0, total_size); + /* cast through void* to get rid of alignment warnings */ + sa = (struct sockaddr_storage *)(void *)((u8_t *)ai + sizeof(struct addrinfo)); + if (IP_IS_V6_VAL(addr)) { +#if LWIP_IPV6 + struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; + /* set up sockaddr */ + inet6_addr_from_ip6addr(&sa6->sin6_addr, ip_2_ip6(&addr)); + sa6->sin6_family = AF_INET6; + sa6->sin6_len = sizeof(struct sockaddr_in6); + sa6->sin6_port = lwip_htons((u16_t)port_nr); + sa6->sin6_scope_id = ip6_addr_zone(ip_2_ip6(&addr)); + ai->ai_family = AF_INET6; +#endif /* LWIP_IPV6 */ + } else { +#if LWIP_IPV4 + struct sockaddr_in *sa4 = (struct sockaddr_in *)sa; + /* set up sockaddr */ + inet_addr_from_ip4addr(&sa4->sin_addr, ip_2_ip4(&addr)); + sa4->sin_family = AF_INET; + sa4->sin_len = sizeof(struct sockaddr_in); + sa4->sin_port = lwip_htons((u16_t)port_nr); + ai->ai_family = AF_INET; +#endif /* LWIP_IPV4 */ + } + + /* set up addrinfo */ + if (hints != NULL) { + /* copy socktype & protocol from hints if specified */ + ai->ai_socktype = hints->ai_socktype; + ai->ai_protocol = hints->ai_protocol; + } + if (nodename != NULL) { + /* copy nodename to canonname if specified */ + ai->ai_canonname = ((char *)ai + sizeof(struct addrinfo) + sizeof(struct sockaddr_storage)); + MEMCPY(ai->ai_canonname, nodename, namelen); + ai->ai_canonname[namelen] = 0; + } + ai->ai_addrlen = sizeof(struct sockaddr_storage); + ai->ai_addr = (struct sockaddr *)sa; + + *res = ai; + + return 0; +} + +#endif /* LWIP_DNS && LWIP_SOCKET */ diff --git a/lib/lwip/api/netifapi.c b/lib/lwip/api/netifapi.c new file mode 100644 index 0000000000..25957cd5c3 --- /dev/null +++ b/lib/lwip/api/netifapi.c @@ -0,0 +1,380 @@ +/** + * @file + * Network Interface Sequential API module + * + * @defgroup netifapi NETIF API + * @ingroup sequential_api + * Thread-safe functions to be called from non-TCPIP threads + * + * @defgroup netifapi_netif NETIF related + * @ingroup netifapi + * To be called from non-TCPIP threads + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "lwip/opt.h" + +#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/etharp.h" +#include "lwip/netifapi.h" +#include "lwip/memp.h" +#include "lwip/priv/tcpip_priv.h" + +#include <string.h> /* strncpy */ + +#define NETIFAPI_VAR_REF(name) API_VAR_REF(name) +#define NETIFAPI_VAR_DECLARE(name) API_VAR_DECLARE(struct netifapi_msg, name) +#define NETIFAPI_VAR_ALLOC(name) API_VAR_ALLOC(struct netifapi_msg, MEMP_NETIFAPI_MSG, name, ERR_MEM) +#define NETIFAPI_VAR_FREE(name) API_VAR_FREE(MEMP_NETIFAPI_MSG, name) + +/** + * Call netif_add() inside the tcpip_thread context. + */ +static err_t +netifapi_do_netif_add(struct tcpip_api_call_data *m) +{ + /* cast through void* to silence alignment warnings. + * We know it works because the structs have been instantiated as struct netifapi_msg */ + struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m; + + if (!netif_add( msg->netif, +#if LWIP_IPV4 + API_EXPR_REF(msg->msg.add.ipaddr), + API_EXPR_REF(msg->msg.add.netmask), + API_EXPR_REF(msg->msg.add.gw), +#endif /* LWIP_IPV4 */ + msg->msg.add.state, + msg->msg.add.init, + msg->msg.add.input)) { + return ERR_IF; + } else { + return ERR_OK; + } +} + +#if LWIP_IPV4 +/** + * Call netif_set_addr() inside the tcpip_thread context. + */ +static err_t +netifapi_do_netif_set_addr(struct tcpip_api_call_data *m) +{ + /* cast through void* to silence alignment warnings. + * We know it works because the structs have been instantiated as struct netifapi_msg */ + struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m; + + netif_set_addr( msg->netif, + API_EXPR_REF(msg->msg.add.ipaddr), + API_EXPR_REF(msg->msg.add.netmask), + API_EXPR_REF(msg->msg.add.gw)); + return ERR_OK; +} +#endif /* LWIP_IPV4 */ + +/** +* Call netif_name_to_index() inside the tcpip_thread context. +*/ +static err_t +netifapi_do_name_to_index(struct tcpip_api_call_data *m) +{ + /* cast through void* to silence alignment warnings. + * We know it works because the structs have been instantiated as struct netifapi_msg */ + struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m; + + msg->msg.ifs.index = netif_name_to_index(msg->msg.ifs.name); + return ERR_OK; +} + +/** +* Call netif_index_to_name() inside the tcpip_thread context. +*/ +static err_t +netifapi_do_index_to_name(struct tcpip_api_call_data *m) +{ + /* cast through void* to silence alignment warnings. + * We know it works because the structs have been instantiated as struct netifapi_msg */ + struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m; + + if (!netif_index_to_name(msg->msg.ifs.index, msg->msg.ifs.name)) { + /* return failure via empty name */ + msg->msg.ifs.name[0] = '\0'; + } + return ERR_OK; +} + +/** + * Call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) inside the + * tcpip_thread context. + */ +static err_t +netifapi_do_netif_common(struct tcpip_api_call_data *m) +{ + /* cast through void* to silence alignment warnings. + * We know it works because the structs have been instantiated as struct netifapi_msg */ + struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m; + + if (msg->msg.common.errtfunc != NULL) { + return msg->msg.common.errtfunc(msg->netif); + } else { + msg->msg.common.voidfunc(msg->netif); + return ERR_OK; + } +} + +#if LWIP_ARP && LWIP_IPV4 +/** + * @ingroup netifapi_arp + * Add or update an entry in the ARP cache. + * For an update, ipaddr is used to find the cache entry. + * + * @param ipaddr IPv4 address of cache entry + * @param ethaddr hardware address mapped to ipaddr + * @param type type of ARP cache entry + * @return ERR_OK: entry added/updated, else error from err_t + */ +err_t +netifapi_arp_add(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr, enum netifapi_arp_entry type) +{ + err_t err; + + /* We only support permanent entries currently */ + LWIP_UNUSED_ARG(type); + +#if ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING + LOCK_TCPIP_CORE(); + err = etharp_add_static_entry(ipaddr, ethaddr); + UNLOCK_TCPIP_CORE(); +#else + /* @todo add new vars to struct netifapi_msg and create a 'do' func */ + LWIP_UNUSED_ARG(ipaddr); + LWIP_UNUSED_ARG(ethaddr); + err = ERR_VAL; +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING */ + + return err; +} + +/** + * @ingroup netifapi_arp + * Remove an entry in the ARP cache identified by ipaddr + * + * @param ipaddr IPv4 address of cache entry + * @param type type of ARP cache entry + * @return ERR_OK: entry removed, else error from err_t + */ +err_t +netifapi_arp_remove(const ip4_addr_t *ipaddr, enum netifapi_arp_entry type) +{ + err_t err; + + /* We only support permanent entries currently */ + LWIP_UNUSED_ARG(type); + +#if ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING + LOCK_TCPIP_CORE(); + err = etharp_remove_static_entry(ipaddr); + UNLOCK_TCPIP_CORE(); +#else + /* @todo add new vars to struct netifapi_msg and create a 'do' func */ + LWIP_UNUSED_ARG(ipaddr); + err = ERR_VAL; +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING */ + + return err; +} +#endif /* LWIP_ARP && LWIP_IPV4 */ + +/** + * @ingroup netifapi_netif + * Call netif_add() in a thread-safe way by running that function inside the + * tcpip_thread context. + * + * @note for params @see netif_add() + */ +err_t +netifapi_netif_add(struct netif *netif, +#if LWIP_IPV4 + const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw, +#endif /* LWIP_IPV4 */ + void *state, netif_init_fn init, netif_input_fn input) +{ + err_t err; + NETIFAPI_VAR_DECLARE(msg); + NETIFAPI_VAR_ALLOC(msg); + +#if LWIP_IPV4 + if (ipaddr == NULL) { + ipaddr = IP4_ADDR_ANY4; + } + if (netmask == NULL) { + netmask = IP4_ADDR_ANY4; + } + if (gw == NULL) { + gw = IP4_ADDR_ANY4; + } +#endif /* LWIP_IPV4 */ + + NETIFAPI_VAR_REF(msg).netif = netif; +#if LWIP_IPV4 + NETIFAPI_VAR_REF(msg).msg.add.ipaddr = NETIFAPI_VAR_REF(ipaddr); + NETIFAPI_VAR_REF(msg).msg.add.netmask = NETIFAPI_VAR_REF(netmask); + NETIFAPI_VAR_REF(msg).msg.add.gw = NETIFAPI_VAR_REF(gw); +#endif /* LWIP_IPV4 */ + NETIFAPI_VAR_REF(msg).msg.add.state = state; + NETIFAPI_VAR_REF(msg).msg.add.init = init; + NETIFAPI_VAR_REF(msg).msg.add.input = input; + err = tcpip_api_call(netifapi_do_netif_add, &API_VAR_REF(msg).call); + NETIFAPI_VAR_FREE(msg); + return err; +} + +#if LWIP_IPV4 +/** + * @ingroup netifapi_netif + * Call netif_set_addr() in a thread-safe way by running that function inside the + * tcpip_thread context. + * + * @note for params @see netif_set_addr() + */ +err_t +netifapi_netif_set_addr(struct netif *netif, + const ip4_addr_t *ipaddr, + const ip4_addr_t *netmask, + const ip4_addr_t *gw) +{ + err_t err; + NETIFAPI_VAR_DECLARE(msg); + NETIFAPI_VAR_ALLOC(msg); + + if (ipaddr == NULL) { + ipaddr = IP4_ADDR_ANY4; + } + if (netmask == NULL) { + netmask = IP4_ADDR_ANY4; + } + if (gw == NULL) { + gw = IP4_ADDR_ANY4; + } + + NETIFAPI_VAR_REF(msg).netif = netif; + NETIFAPI_VAR_REF(msg).msg.add.ipaddr = NETIFAPI_VAR_REF(ipaddr); + NETIFAPI_VAR_REF(msg).msg.add.netmask = NETIFAPI_VAR_REF(netmask); + NETIFAPI_VAR_REF(msg).msg.add.gw = NETIFAPI_VAR_REF(gw); + err = tcpip_api_call(netifapi_do_netif_set_addr, &API_VAR_REF(msg).call); + NETIFAPI_VAR_FREE(msg); + return err; +} +#endif /* LWIP_IPV4 */ + +/** + * call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) in a thread-safe + * way by running that function inside the tcpip_thread context. + * + * @note use only for functions where there is only "netif" parameter. + */ +err_t +netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc, + netifapi_errt_fn errtfunc) +{ + err_t err; + NETIFAPI_VAR_DECLARE(msg); + NETIFAPI_VAR_ALLOC(msg); + + NETIFAPI_VAR_REF(msg).netif = netif; + NETIFAPI_VAR_REF(msg).msg.common.voidfunc = voidfunc; + NETIFAPI_VAR_REF(msg).msg.common.errtfunc = errtfunc; + err = tcpip_api_call(netifapi_do_netif_common, &API_VAR_REF(msg).call); + NETIFAPI_VAR_FREE(msg); + return err; +} + +/** +* @ingroup netifapi_netif +* Call netif_name_to_index() in a thread-safe way by running that function inside the +* tcpip_thread context. +* +* @param name the interface name of the netif +* @param idx output index of the found netif +*/ +err_t +netifapi_netif_name_to_index(const char *name, u8_t *idx) +{ + err_t err; + NETIFAPI_VAR_DECLARE(msg); + NETIFAPI_VAR_ALLOC(msg); + + *idx = 0; + +#if LWIP_MPU_COMPATIBLE + strncpy(NETIFAPI_VAR_REF(msg).msg.ifs.name, name, NETIF_NAMESIZE - 1); + NETIFAPI_VAR_REF(msg).msg.ifs.name[NETIF_NAMESIZE - 1] = '\0'; +#else + NETIFAPI_VAR_REF(msg).msg.ifs.name = LWIP_CONST_CAST(char *, name); +#endif /* LWIP_MPU_COMPATIBLE */ + err = tcpip_api_call(netifapi_do_name_to_index, &API_VAR_REF(msg).call); + if (!err) { + *idx = NETIFAPI_VAR_REF(msg).msg.ifs.index; + } + NETIFAPI_VAR_FREE(msg); + return err; +} + +/** +* @ingroup netifapi_netif +* Call netif_index_to_name() in a thread-safe way by running that function inside the +* tcpip_thread context. +* +* @param idx the interface index of the netif +* @param name output name of the found netif, empty '\0' string if netif not found. +* name should be of at least NETIF_NAMESIZE bytes +*/ +err_t +netifapi_netif_index_to_name(u8_t idx, char *name) +{ + err_t err; + NETIFAPI_VAR_DECLARE(msg); + NETIFAPI_VAR_ALLOC(msg); + + NETIFAPI_VAR_REF(msg).msg.ifs.index = idx; +#if !LWIP_MPU_COMPATIBLE + NETIFAPI_VAR_REF(msg).msg.ifs.name = name; +#endif /* LWIP_MPU_COMPATIBLE */ + err = tcpip_api_call(netifapi_do_index_to_name, &API_VAR_REF(msg).call); +#if LWIP_MPU_COMPATIBLE + if (!err) { + strncpy(name, NETIFAPI_VAR_REF(msg).msg.ifs.name, NETIF_NAMESIZE - 1); + name[NETIF_NAMESIZE - 1] = '\0'; + } +#endif /* LWIP_MPU_COMPATIBLE */ + NETIFAPI_VAR_FREE(msg); + return err; +} + +#endif /* LWIP_NETIF_API */ diff --git a/lib/lwip/api/sockets.c b/lib/lwip/api/sockets.c new file mode 100644 index 0000000000..b9111943b6 --- /dev/null +++ b/lib/lwip/api/sockets.c @@ -0,0 +1,4205 @@ +/** + * @file + * Sockets BSD-Like API module + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + * Improved by Marc Boucher marc@mbsi.ca and David Haas dhaas@alum.rpi.edu + * + */ + +#include "lwip/opt.h" + +#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/sockets.h" +#include "lwip/priv/sockets_priv.h" +#include "lwip/api.h" +#include "lwip/igmp.h" +#include "lwip/inet.h" +#include "lwip/tcp.h" +#include "lwip/raw.h" +#include "lwip/udp.h" +#include "lwip/memp.h" +#include "lwip/pbuf.h" +#include "lwip/netif.h" +#include "lwip/priv/tcpip_priv.h" +#include "lwip/mld6.h" +#if LWIP_CHECKSUM_ON_COPY +#include "lwip/inet_chksum.h" +#endif + +#if LWIP_COMPAT_SOCKETS == 2 && LWIP_POSIX_SOCKETS_IO_NAMES +#include <stdarg.h> +#endif + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +/* If the netconn API is not required publicly, then we include the necessary + files here to get the implementation */ +#if !LWIP_NETCONN +#undef LWIP_NETCONN +#define LWIP_NETCONN 1 +#include "api_msg.c" +#include "api_lib.c" +#include "netbuf.c" +#undef LWIP_NETCONN +#define LWIP_NETCONN 0 +#endif + +#define API_SELECT_CB_VAR_REF(name) API_VAR_REF(name) +#define API_SELECT_CB_VAR_DECLARE(name) API_VAR_DECLARE(struct lwip_select_cb, name) +#define API_SELECT_CB_VAR_ALLOC(name, retblock) API_VAR_ALLOC_EXT(struct lwip_select_cb, MEMP_SELECT_CB, name, retblock) +#define API_SELECT_CB_VAR_FREE(name) API_VAR_FREE(MEMP_SELECT_CB, name) + +#ifndef LWIP_SOCKET_HAVE_SA_LEN +#define LWIP_SOCKET_HAVE_SA_LEN 0 +#endif /* LWIP_SOCKET_HAVE_SA_LEN */ + +/* Address length safe read and write */ +#if LWIP_SOCKET_HAVE_SA_LEN + +#if LWIP_IPV4 +#define IP4ADDR_SOCKADDR_SET_LEN(sin) \ + (sin)->sin_len = sizeof(struct sockaddr_in) +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +#define IP6ADDR_SOCKADDR_SET_LEN(sin6) \ + (sin6)->sin6_len = sizeof(struct sockaddr_in6) +#endif /* LWIP_IPV6 */ + +#define IPADDR_SOCKADDR_GET_LEN(addr) \ + (addr)->sa.sa_len + +#else + +#if LWIP_IPV4 +#define IP4ADDR_SOCKADDR_SET_LEN(addr) +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +#define IP6ADDR_SOCKADDR_SET_LEN(addr) +#endif /* LWIP_IPV6 */ + +#if LWIP_IPV4 && LWIP_IPV6 +#define IPADDR_SOCKADDR_GET_LEN(addr) \ + ((addr)->sa.sa_family == AF_INET ? sizeof(struct sockaddr_in) \ + : ((addr)->sa.sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : 0)) +#elif LWIP_IPV4 +#define IPADDR_SOCKADDR_GET_LEN(addr) sizeof(struct sockaddr_in) +#elif LWIP_IPV6 +#define IPADDR_SOCKADDR_GET_LEN(addr) sizeof(struct sockaddr_in6) +#else +#define IPADDR_SOCKADDR_GET_LEN(addr) sizeof(struct sockaddr) +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + +#endif /* LWIP_SOCKET_HAVE_SA_LEN */ + +#if LWIP_IPV4 +#define IP4ADDR_PORT_TO_SOCKADDR(sin, ipaddr, port) do { \ + IP4ADDR_SOCKADDR_SET_LEN(sin); \ + (sin)->sin_family = AF_INET; \ + (sin)->sin_port = lwip_htons((port)); \ + inet_addr_from_ip4addr(&(sin)->sin_addr, ipaddr); \ + memset((sin)->sin_zero, 0, SIN_ZERO_LEN); }while(0) +#define SOCKADDR4_TO_IP4ADDR_PORT(sin, ipaddr, port) do { \ + inet_addr_to_ip4addr(ip_2_ip4(ipaddr), &((sin)->sin_addr)); \ + (port) = lwip_ntohs((sin)->sin_port); }while(0) +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +#define IP6ADDR_PORT_TO_SOCKADDR(sin6, ipaddr, port) do { \ + IP6ADDR_SOCKADDR_SET_LEN(sin6); \ + (sin6)->sin6_family = AF_INET6; \ + (sin6)->sin6_port = lwip_htons((port)); \ + (sin6)->sin6_flowinfo = 0; \ + inet6_addr_from_ip6addr(&(sin6)->sin6_addr, ipaddr); \ + (sin6)->sin6_scope_id = ip6_addr_zone(ipaddr); }while(0) +#define SOCKADDR6_TO_IP6ADDR_PORT(sin6, ipaddr, port) do { \ + inet6_addr_to_ip6addr(ip_2_ip6(ipaddr), &((sin6)->sin6_addr)); \ + if (ip6_addr_has_scope(ip_2_ip6(ipaddr), IP6_UNKNOWN)) { \ + ip6_addr_set_zone(ip_2_ip6(ipaddr), (u8_t)((sin6)->sin6_scope_id)); \ + } \ + (port) = lwip_ntohs((sin6)->sin6_port); }while(0) +#endif /* LWIP_IPV6 */ + +#if LWIP_IPV4 && LWIP_IPV6 +static void sockaddr_to_ipaddr_port(const struct sockaddr *sockaddr, ip_addr_t *ipaddr, u16_t *port); + +#define IS_SOCK_ADDR_LEN_VALID(namelen) (((namelen) == sizeof(struct sockaddr_in)) || \ + ((namelen) == sizeof(struct sockaddr_in6))) +#define IS_SOCK_ADDR_TYPE_VALID(name) (((name)->sa_family == AF_INET) || \ + ((name)->sa_family == AF_INET6)) +#define SOCK_ADDR_TYPE_MATCH(name, sock) \ + ((((name)->sa_family == AF_INET) && !(NETCONNTYPE_ISIPV6((sock)->conn->type))) || \ + (((name)->sa_family == AF_INET6) && (NETCONNTYPE_ISIPV6((sock)->conn->type)))) +#define IPADDR_PORT_TO_SOCKADDR(sockaddr, ipaddr, port) do { \ + if (IP_IS_ANY_TYPE_VAL(*ipaddr) || IP_IS_V6_VAL(*ipaddr)) { \ + IP6ADDR_PORT_TO_SOCKADDR((struct sockaddr_in6*)(void*)(sockaddr), ip_2_ip6(ipaddr), port); \ + } else { \ + IP4ADDR_PORT_TO_SOCKADDR((struct sockaddr_in*)(void*)(sockaddr), ip_2_ip4(ipaddr), port); \ + } } while(0) +#define SOCKADDR_TO_IPADDR_PORT(sockaddr, ipaddr, port) sockaddr_to_ipaddr_port(sockaddr, ipaddr, &(port)) +#define DOMAIN_TO_NETCONN_TYPE(domain, type) (((domain) == AF_INET) ? \ + (type) : (enum netconn_type)((type) | NETCONN_TYPE_IPV6)) +#elif LWIP_IPV6 /* LWIP_IPV4 && LWIP_IPV6 */ +#define IS_SOCK_ADDR_LEN_VALID(namelen) ((namelen) == sizeof(struct sockaddr_in6)) +#define IS_SOCK_ADDR_TYPE_VALID(name) ((name)->sa_family == AF_INET6) +#define SOCK_ADDR_TYPE_MATCH(name, sock) 1 +#define IPADDR_PORT_TO_SOCKADDR(sockaddr, ipaddr, port) \ + IP6ADDR_PORT_TO_SOCKADDR((struct sockaddr_in6*)(void*)(sockaddr), ip_2_ip6(ipaddr), port) +#define SOCKADDR_TO_IPADDR_PORT(sockaddr, ipaddr, port) \ + SOCKADDR6_TO_IP6ADDR_PORT((const struct sockaddr_in6*)(const void*)(sockaddr), ipaddr, port) +#define DOMAIN_TO_NETCONN_TYPE(domain, netconn_type) (netconn_type) +#else /*-> LWIP_IPV4: LWIP_IPV4 && LWIP_IPV6 */ +#define IS_SOCK_ADDR_LEN_VALID(namelen) ((namelen) == sizeof(struct sockaddr_in)) +#define IS_SOCK_ADDR_TYPE_VALID(name) ((name)->sa_family == AF_INET) +#define SOCK_ADDR_TYPE_MATCH(name, sock) 1 +#define IPADDR_PORT_TO_SOCKADDR(sockaddr, ipaddr, port) \ + IP4ADDR_PORT_TO_SOCKADDR((struct sockaddr_in*)(void*)(sockaddr), ip_2_ip4(ipaddr), port) +#define SOCKADDR_TO_IPADDR_PORT(sockaddr, ipaddr, port) \ + SOCKADDR4_TO_IP4ADDR_PORT((const struct sockaddr_in*)(const void*)(sockaddr), ipaddr, port) +#define DOMAIN_TO_NETCONN_TYPE(domain, netconn_type) (netconn_type) +#endif /* LWIP_IPV6 */ + +#define IS_SOCK_ADDR_TYPE_VALID_OR_UNSPEC(name) (((name)->sa_family == AF_UNSPEC) || \ + IS_SOCK_ADDR_TYPE_VALID(name)) +#define SOCK_ADDR_TYPE_MATCH_OR_UNSPEC(name, sock) (((name)->sa_family == AF_UNSPEC) || \ + SOCK_ADDR_TYPE_MATCH(name, sock)) +#define IS_SOCK_ADDR_ALIGNED(name) ((((mem_ptr_t)(name)) % LWIP_MIN(4, MEM_ALIGNMENT)) == 0) + + +#define LWIP_SOCKOPT_CHECK_OPTLEN(sock, optlen, opttype) do { if ((optlen) < sizeof(opttype)) { done_socket(sock); return EINVAL; }}while(0) +#define LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, opttype) do { \ + LWIP_SOCKOPT_CHECK_OPTLEN(sock, optlen, opttype); \ + if ((sock)->conn == NULL) { done_socket(sock); return EINVAL; } }while(0) +#define LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, opttype) do { \ + LWIP_SOCKOPT_CHECK_OPTLEN(sock, optlen, opttype); \ + if (((sock)->conn == NULL) || ((sock)->conn->pcb.tcp == NULL)) { done_socket(sock); return EINVAL; } }while(0) +#define LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, opttype, netconntype) do { \ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, opttype); \ + if (NETCONNTYPE_GROUP(netconn_type((sock)->conn)) != netconntype) { done_socket(sock); return ENOPROTOOPT; } }while(0) + + +#define LWIP_SETGETSOCKOPT_DATA_VAR_REF(name) API_VAR_REF(name) +#define LWIP_SETGETSOCKOPT_DATA_VAR_DECLARE(name) API_VAR_DECLARE(struct lwip_setgetsockopt_data, name) +#define LWIP_SETGETSOCKOPT_DATA_VAR_FREE(name) API_VAR_FREE(MEMP_SOCKET_SETGETSOCKOPT_DATA, name) +#if LWIP_MPU_COMPATIBLE +#define LWIP_SETGETSOCKOPT_DATA_VAR_ALLOC(name, sock) do { \ + name = (struct lwip_setgetsockopt_data *)memp_malloc(MEMP_SOCKET_SETGETSOCKOPT_DATA); \ + if (name == NULL) { \ + set_errno(ENOMEM); \ + done_socket(sock); \ + return -1; \ + } }while(0) +#else /* LWIP_MPU_COMPATIBLE */ +#define LWIP_SETGETSOCKOPT_DATA_VAR_ALLOC(name, sock) +#endif /* LWIP_MPU_COMPATIBLE */ + +#if LWIP_SO_SNDRCVTIMEO_NONSTANDARD +#define LWIP_SO_SNDRCVTIMEO_OPTTYPE int +#define LWIP_SO_SNDRCVTIMEO_SET(optval, val) (*(int *)(optval) = (val)) +#define LWIP_SO_SNDRCVTIMEO_GET_MS(optval) ((long)*(const int*)(optval)) +#else +#define LWIP_SO_SNDRCVTIMEO_OPTTYPE struct timeval +#define LWIP_SO_SNDRCVTIMEO_SET(optval, val) do { \ + u32_t loc = (val); \ + ((struct timeval *)(optval))->tv_sec = (long)((loc) / 1000U); \ + ((struct timeval *)(optval))->tv_usec = (long)(((loc) % 1000U) * 1000U); }while(0) +#define LWIP_SO_SNDRCVTIMEO_GET_MS(optval) ((((const struct timeval *)(optval))->tv_sec * 1000) + (((const struct timeval *)(optval))->tv_usec / 1000)) +#endif + + +/** A struct sockaddr replacement that has the same alignment as sockaddr_in/ + * sockaddr_in6 if instantiated. + */ +union sockaddr_aligned { + struct sockaddr sa; +#if LWIP_IPV6 + struct sockaddr_in6 sin6; +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 + struct sockaddr_in sin; +#endif /* LWIP_IPV4 */ +}; + +/* Define the number of IPv4 multicast memberships, default is one per socket */ +#ifndef LWIP_SOCKET_MAX_MEMBERSHIPS +#define LWIP_SOCKET_MAX_MEMBERSHIPS NUM_SOCKETS +#endif + +#if LWIP_IGMP +/* This is to keep track of IP_ADD_MEMBERSHIP calls to drop the membership when + a socket is closed */ +struct lwip_socket_multicast_pair { + /** the socket */ + struct lwip_sock *sock; + /** the interface address */ + ip4_addr_t if_addr; + /** the group address */ + ip4_addr_t multi_addr; +}; + +static struct lwip_socket_multicast_pair socket_ipv4_multicast_memberships[LWIP_SOCKET_MAX_MEMBERSHIPS]; + +static int lwip_socket_register_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr); +static void lwip_socket_unregister_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr); +static void lwip_socket_drop_registered_memberships(int s); +#endif /* LWIP_IGMP */ + +#if LWIP_IPV6_MLD +/* This is to keep track of IP_JOIN_GROUP calls to drop the membership when + a socket is closed */ +struct lwip_socket_multicast_mld6_pair { + /** the socket */ + struct lwip_sock *sock; + /** the interface index */ + u8_t if_idx; + /** the group address */ + ip6_addr_t multi_addr; +}; + +static struct lwip_socket_multicast_mld6_pair socket_ipv6_multicast_memberships[LWIP_SOCKET_MAX_MEMBERSHIPS]; + +static int lwip_socket_register_mld6_membership(int s, unsigned int if_idx, const ip6_addr_t *multi_addr); +static void lwip_socket_unregister_mld6_membership(int s, unsigned int if_idx, const ip6_addr_t *multi_addr); +static void lwip_socket_drop_registered_mld6_memberships(int s); +#endif /* LWIP_IPV6_MLD */ + +/** The global array of available sockets */ +static struct lwip_sock sockets[NUM_SOCKETS]; + +#if LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL +#if LWIP_TCPIP_CORE_LOCKING +/* protect the select_cb_list using core lock */ +#define LWIP_SOCKET_SELECT_DECL_PROTECT(lev) +#define LWIP_SOCKET_SELECT_PROTECT(lev) LOCK_TCPIP_CORE() +#define LWIP_SOCKET_SELECT_UNPROTECT(lev) UNLOCK_TCPIP_CORE() +#else /* LWIP_TCPIP_CORE_LOCKING */ +/* protect the select_cb_list using SYS_LIGHTWEIGHT_PROT */ +#define LWIP_SOCKET_SELECT_DECL_PROTECT(lev) SYS_ARCH_DECL_PROTECT(lev) +#define LWIP_SOCKET_SELECT_PROTECT(lev) SYS_ARCH_PROTECT(lev) +#define LWIP_SOCKET_SELECT_UNPROTECT(lev) SYS_ARCH_UNPROTECT(lev) +/** This counter is increased from lwip_select when the list is changed + and checked in select_check_waiters to see if it has changed. */ +static volatile int select_cb_ctr; +#endif /* LWIP_TCPIP_CORE_LOCKING */ +/** The global list of tasks waiting for select */ +static struct lwip_select_cb *select_cb_list; +#endif /* LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL */ + +/* Forward declaration of some functions */ +#if LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL +static void event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len); +#define DEFAULT_SOCKET_EVENTCB event_callback +static void select_check_waiters(int s, int has_recvevent, int has_sendevent, int has_errevent); +#else +#define DEFAULT_SOCKET_EVENTCB NULL +#endif +#if !LWIP_TCPIP_CORE_LOCKING +static void lwip_getsockopt_callback(void *arg); +static void lwip_setsockopt_callback(void *arg); +#endif +static int lwip_getsockopt_impl(int s, int level, int optname, void *optval, socklen_t *optlen); +static int lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_t optlen); +static int free_socket_locked(struct lwip_sock *sock, int is_tcp, struct netconn **conn, + union lwip_sock_lastdata *lastdata); +static void free_socket_free_elements(int is_tcp, struct netconn *conn, union lwip_sock_lastdata *lastdata); + +#if LWIP_IPV4 && LWIP_IPV6 +static void +sockaddr_to_ipaddr_port(const struct sockaddr *sockaddr, ip_addr_t *ipaddr, u16_t *port) +{ + if ((sockaddr->sa_family) == AF_INET6) { + SOCKADDR6_TO_IP6ADDR_PORT((const struct sockaddr_in6 *)(const void *)(sockaddr), ipaddr, *port); + ipaddr->type = IPADDR_TYPE_V6; + } else { + SOCKADDR4_TO_IP4ADDR_PORT((const struct sockaddr_in *)(const void *)(sockaddr), ipaddr, *port); + ipaddr->type = IPADDR_TYPE_V4; + } +} +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + +/** LWIP_NETCONN_SEM_PER_THREAD==1: initialize thread-local semaphore */ +void +lwip_socket_thread_init(void) +{ + netconn_thread_init(); +} + +/** LWIP_NETCONN_SEM_PER_THREAD==1: destroy thread-local semaphore */ +void +lwip_socket_thread_cleanup(void) +{ + netconn_thread_cleanup(); +} + +#if LWIP_NETCONN_FULLDUPLEX +/* Thread-safe increment of sock->fd_used, with overflow check */ +static int +sock_inc_used(struct lwip_sock *sock) +{ + int ret; + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_ASSERT("sock != NULL", sock != NULL); + + SYS_ARCH_PROTECT(lev); + if (sock->fd_free_pending) { + /* prevent new usage of this socket if free is pending */ + ret = 0; + } else { + ++sock->fd_used; + ret = 1; + LWIP_ASSERT("sock->fd_used != 0", sock->fd_used != 0); + } + SYS_ARCH_UNPROTECT(lev); + return ret; +} + +/* Like sock_inc_used(), but called under SYS_ARCH_PROTECT lock. */ +static int +sock_inc_used_locked(struct lwip_sock *sock) +{ + LWIP_ASSERT("sock != NULL", sock != NULL); + + if (sock->fd_free_pending) { + LWIP_ASSERT("sock->fd_used != 0", sock->fd_used != 0); + return 0; + } + + ++sock->fd_used; + LWIP_ASSERT("sock->fd_used != 0", sock->fd_used != 0); + return 1; +} + +/* In full-duplex mode,sock->fd_used != 0 prevents a socket descriptor from being + * released (and possibly reused) when used from more than one thread + * (e.g. read-while-write or close-while-write, etc) + * This function is called at the end of functions using (try)get_socket*(). + */ +static void +done_socket(struct lwip_sock *sock) +{ + int freed = 0; + int is_tcp = 0; + struct netconn *conn = NULL; + union lwip_sock_lastdata lastdata; + SYS_ARCH_DECL_PROTECT(lev); + LWIP_ASSERT("sock != NULL", sock != NULL); + + SYS_ARCH_PROTECT(lev); + LWIP_ASSERT("sock->fd_used > 0", sock->fd_used > 0); + if (--sock->fd_used == 0) { + if (sock->fd_free_pending) { + /* free the socket */ + sock->fd_used = 1; + is_tcp = sock->fd_free_pending & LWIP_SOCK_FD_FREE_TCP; + freed = free_socket_locked(sock, is_tcp, &conn, &lastdata); + } + } + SYS_ARCH_UNPROTECT(lev); + + if (freed) { + free_socket_free_elements(is_tcp, conn, &lastdata); + } +} + +#else /* LWIP_NETCONN_FULLDUPLEX */ +#define sock_inc_used(sock) 1 +#define sock_inc_used_locked(sock) 1 +#define done_socket(sock) +#endif /* LWIP_NETCONN_FULLDUPLEX */ + +/* Translate a socket 'int' into a pointer (only fails if the index is invalid) */ +static struct lwip_sock * +tryget_socket_unconn_nouse(int fd) +{ + int s = fd - LWIP_SOCKET_OFFSET; + if ((s < 0) || (s >= NUM_SOCKETS)) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("tryget_socket_unconn(%d): invalid\n", fd)); + return NULL; + } + return &sockets[s]; +} + +struct lwip_sock * +lwip_socket_dbg_get_socket(int fd) +{ + return tryget_socket_unconn_nouse(fd); +} + +/* Translate a socket 'int' into a pointer (only fails if the index is invalid) */ +static struct lwip_sock * +tryget_socket_unconn(int fd) +{ + struct lwip_sock *ret = tryget_socket_unconn_nouse(fd); + if (ret != NULL) { + if (!sock_inc_used(ret)) { + return NULL; + } + } + return ret; +} + +/* Like tryget_socket_unconn(), but called under SYS_ARCH_PROTECT lock. */ +static struct lwip_sock * +tryget_socket_unconn_locked(int fd) +{ + struct lwip_sock *ret = tryget_socket_unconn_nouse(fd); + if (ret != NULL) { + if (!sock_inc_used_locked(ret)) { + return NULL; + } + } + return ret; +} + +/** + * Same as get_socket but doesn't set errno + * + * @param fd externally used socket index + * @return struct lwip_sock for the socket or NULL if not found + */ +static struct lwip_sock * +tryget_socket(int fd) +{ + struct lwip_sock *sock = tryget_socket_unconn(fd); + if (sock != NULL) { + if (sock->conn) { + return sock; + } + done_socket(sock); + } + return NULL; +} + +/** + * Map a externally used socket index to the internal socket representation. + * + * @param fd externally used socket index + * @return struct lwip_sock for the socket or NULL if not found + */ +static struct lwip_sock * +get_socket(int fd) +{ + struct lwip_sock *sock = tryget_socket(fd); + if (!sock) { + if ((fd < LWIP_SOCKET_OFFSET) || (fd >= (LWIP_SOCKET_OFFSET + NUM_SOCKETS))) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): invalid\n", fd)); + } + set_errno(EBADF); + return NULL; + } + return sock; +} + +/** + * Allocate a new socket for a given netconn. + * + * @param newconn the netconn for which to allocate a socket + * @param accepted 1 if socket has been created by accept(), + * 0 if socket has been created by socket() + * @return the index of the new socket; -1 on error + */ +static int +alloc_socket(struct netconn *newconn, int accepted) +{ + int i; + SYS_ARCH_DECL_PROTECT(lev); + LWIP_UNUSED_ARG(accepted); + + /* allocate a new socket identifier */ + for (i = 0; i < NUM_SOCKETS; ++i) { + /* Protect socket array */ + SYS_ARCH_PROTECT(lev); + if (!sockets[i].conn) { +#if LWIP_NETCONN_FULLDUPLEX + if (sockets[i].fd_used) { + SYS_ARCH_UNPROTECT(lev); + continue; + } + sockets[i].fd_used = 1; + sockets[i].fd_free_pending = 0; +#endif + sockets[i].conn = newconn; + /* The socket is not yet known to anyone, so no need to protect + after having marked it as used. */ + SYS_ARCH_UNPROTECT(lev); + sockets[i].lastdata.pbuf = NULL; +#if LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL + LWIP_ASSERT("sockets[i].select_waiting == 0", sockets[i].select_waiting == 0); + sockets[i].rcvevent = 0; + /* TCP sendbuf is empty, but the socket is not yet writable until connected + * (unless it has been created by accept()). */ + sockets[i].sendevent = (NETCONNTYPE_GROUP(newconn->type) == NETCONN_TCP ? (accepted != 0) : 1); + sockets[i].errevent = 0; +#endif /* LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL */ + return i + LWIP_SOCKET_OFFSET; + } + SYS_ARCH_UNPROTECT(lev); + } + return -1; +} + +/** Free a socket (under lock) + * + * @param sock the socket to free + * @param is_tcp != 0 for TCP sockets, used to free lastdata + * @param conn the socekt's netconn is stored here, must be freed externally + * @param lastdata lastdata is stored here, must be freed externally + */ +static int +free_socket_locked(struct lwip_sock *sock, int is_tcp, struct netconn **conn, + union lwip_sock_lastdata *lastdata) +{ +#if LWIP_NETCONN_FULLDUPLEX + LWIP_ASSERT("sock->fd_used > 0", sock->fd_used > 0); + sock->fd_used--; + if (sock->fd_used > 0) { + sock->fd_free_pending = LWIP_SOCK_FD_FREE_FREE | (is_tcp ? LWIP_SOCK_FD_FREE_TCP : 0); + return 0; + } +#else /* LWIP_NETCONN_FULLDUPLEX */ + LWIP_UNUSED_ARG(is_tcp); +#endif /* LWIP_NETCONN_FULLDUPLEX */ + + *lastdata = sock->lastdata; + sock->lastdata.pbuf = NULL; + *conn = sock->conn; + sock->conn = NULL; + return 1; +} + +/** Free a socket's leftover members. + */ +static void +free_socket_free_elements(int is_tcp, struct netconn *conn, union lwip_sock_lastdata *lastdata) +{ + if (lastdata->pbuf != NULL) { + if (is_tcp) { + pbuf_free(lastdata->pbuf); + } else { + netbuf_delete(lastdata->netbuf); + } + } + if (conn != NULL) { + /* netconn_prepare_delete() has already been called, here we only free the conn */ + netconn_delete(conn); + } +} + +/** Free a socket. The socket's netconn must have been + * delete before! + * + * @param sock the socket to free + * @param is_tcp != 0 for TCP sockets, used to free lastdata + */ +static void +free_socket(struct lwip_sock *sock, int is_tcp) +{ + int freed; + struct netconn *conn; + union lwip_sock_lastdata lastdata; + SYS_ARCH_DECL_PROTECT(lev); + + /* Protect socket array */ + SYS_ARCH_PROTECT(lev); + + freed = free_socket_locked(sock, is_tcp, &conn, &lastdata); + SYS_ARCH_UNPROTECT(lev); + /* don't use 'sock' after this line, as another task might have allocated it */ + + if (freed) { + free_socket_free_elements(is_tcp, conn, &lastdata); + } +} + +/* Below this, the well-known socket functions are implemented. + * Use google.com or opengroup.org to get a good description :-) + * + * Exceptions are documented! + */ + +int +lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen) +{ + struct lwip_sock *sock, *nsock; + struct netconn *newconn; + ip_addr_t naddr; + u16_t port = 0; + int newsock; + err_t err; + int recvevent; + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d)...\n", s)); + sock = get_socket(s); + if (!sock) { + return -1; + } + + /* wait for a new connection */ + err = netconn_accept(sock->conn, &newconn); + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): netconn_acept failed, err=%d\n", s, err)); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + set_errno(EOPNOTSUPP); + } else if (err == ERR_CLSD) { + set_errno(EINVAL); + } else { + set_errno(err_to_errno(err)); + } + done_socket(sock); + return -1; + } + LWIP_ASSERT("newconn != NULL", newconn != NULL); + + newsock = alloc_socket(newconn, 1); + if (newsock == -1) { + netconn_delete(newconn); + set_errno(ENFILE); + done_socket(sock); + return -1; + } + LWIP_ASSERT("invalid socket index", (newsock >= LWIP_SOCKET_OFFSET) && (newsock < NUM_SOCKETS + LWIP_SOCKET_OFFSET)); + nsock = &sockets[newsock - LWIP_SOCKET_OFFSET]; + + /* See event_callback: If data comes in right away after an accept, even + * though the server task might not have created a new socket yet. + * In that case, newconn->socket is counted down (newconn->socket--), + * so nsock->rcvevent is >= 1 here! + */ + SYS_ARCH_PROTECT(lev); + recvevent = (s16_t)(-1 - newconn->callback_arg.socket); + newconn->callback_arg.socket = newsock; + SYS_ARCH_UNPROTECT(lev); + + if (newconn->callback) { + LOCK_TCPIP_CORE(); + while (recvevent > 0) { + recvevent--; + newconn->callback(newconn, NETCONN_EVT_RCVPLUS, 0); + } + UNLOCK_TCPIP_CORE(); + } + + /* Note that POSIX only requires us to check addr is non-NULL. addrlen must + * not be NULL if addr is valid. + */ + if ((addr != NULL) && (addrlen != NULL)) { + union sockaddr_aligned tempaddr; + /* get the IP address and port of the remote host */ + err = netconn_peer(newconn, &naddr, &port); + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): netconn_peer failed, err=%d\n", s, err)); + free_socket(nsock, 1); + set_errno(err_to_errno(err)); + done_socket(sock); + return -1; + } + + IPADDR_PORT_TO_SOCKADDR(&tempaddr, &naddr, port); + if (*addrlen > IPADDR_SOCKADDR_GET_LEN(&tempaddr)) { + *addrlen = IPADDR_SOCKADDR_GET_LEN(&tempaddr); + } + MEMCPY(addr, &tempaddr, *addrlen); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d addr=", s, newsock)); + ip_addr_debug_print_val(SOCKETS_DEBUG, naddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", port)); + } else { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d\n", s, newsock)); + } + + set_errno(0); + done_socket(sock); + done_socket(nsock); + return newsock; +} + +int +lwip_bind(int s, const struct sockaddr *name, socklen_t namelen) +{ + struct lwip_sock *sock; + ip_addr_t local_addr; + u16_t local_port; + err_t err; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (!SOCK_ADDR_TYPE_MATCH(name, sock)) { + /* sockaddr does not match socket type (IPv4/IPv6) */ + set_errno(err_to_errno(ERR_VAL)); + done_socket(sock); + return -1; + } + + /* check size, family and alignment of 'name' */ + LWIP_ERROR("lwip_bind: invalid address", (IS_SOCK_ADDR_LEN_VALID(namelen) && + IS_SOCK_ADDR_TYPE_VALID(name) && IS_SOCK_ADDR_ALIGNED(name)), + set_errno(err_to_errno(ERR_ARG)); done_socket(sock); return -1;); + LWIP_UNUSED_ARG(namelen); + + SOCKADDR_TO_IPADDR_PORT(name, &local_addr, local_port); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d, addr=", s)); + ip_addr_debug_print_val(SOCKETS_DEBUG, local_addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", local_port)); + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Unmap IPv4 mapped IPv6 addresses */ + if (IP_IS_V6_VAL(local_addr) && ip6_addr_isipv4mappedipv6(ip_2_ip6(&local_addr))) { + unmap_ipv4_mapped_ipv6(ip_2_ip4(&local_addr), ip_2_ip6(&local_addr)); + IP_SET_TYPE_VAL(local_addr, IPADDR_TYPE_V4); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + err = netconn_bind(sock->conn, &local_addr, local_port); + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) failed, err=%d\n", s, err)); + set_errno(err_to_errno(err)); + done_socket(sock); + return -1; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) succeeded\n", s)); + set_errno(0); + done_socket(sock); + return 0; +} + +int +lwip_close(int s) +{ + struct lwip_sock *sock; + int is_tcp = 0; + err_t err; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_close(%d)\n", s)); + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (sock->conn != NULL) { + is_tcp = NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP; + } else { + LWIP_ASSERT("sock->lastdata == NULL", sock->lastdata.pbuf == NULL); + } + +#if LWIP_IGMP + /* drop all possibly joined IGMP memberships */ + lwip_socket_drop_registered_memberships(s); +#endif /* LWIP_IGMP */ +#if LWIP_IPV6_MLD + /* drop all possibly joined MLD6 memberships */ + lwip_socket_drop_registered_mld6_memberships(s); +#endif /* LWIP_IPV6_MLD */ + + err = netconn_prepare_delete(sock->conn); + if (err != ERR_OK) { + set_errno(err_to_errno(err)); + done_socket(sock); + return -1; + } + + free_socket(sock, is_tcp); + set_errno(0); + return 0; +} + +int +lwip_connect(int s, const struct sockaddr *name, socklen_t namelen) +{ + struct lwip_sock *sock; + err_t err; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (!SOCK_ADDR_TYPE_MATCH_OR_UNSPEC(name, sock)) { + /* sockaddr does not match socket type (IPv4/IPv6) */ + set_errno(err_to_errno(ERR_VAL)); + done_socket(sock); + return -1; + } + + LWIP_UNUSED_ARG(namelen); + if (name->sa_family == AF_UNSPEC) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, AF_UNSPEC)\n", s)); + err = netconn_disconnect(sock->conn); + } else { + ip_addr_t remote_addr; + u16_t remote_port; + + /* check size, family and alignment of 'name' */ + LWIP_ERROR("lwip_connect: invalid address", IS_SOCK_ADDR_LEN_VALID(namelen) && + IS_SOCK_ADDR_TYPE_VALID_OR_UNSPEC(name) && IS_SOCK_ADDR_ALIGNED(name), + set_errno(err_to_errno(ERR_ARG)); done_socket(sock); return -1;); + + SOCKADDR_TO_IPADDR_PORT(name, &remote_addr, remote_port); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, addr=", s)); + ip_addr_debug_print_val(SOCKETS_DEBUG, remote_addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", remote_port)); + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Unmap IPv4 mapped IPv6 addresses */ + if (IP_IS_V6_VAL(remote_addr) && ip6_addr_isipv4mappedipv6(ip_2_ip6(&remote_addr))) { + unmap_ipv4_mapped_ipv6(ip_2_ip4(&remote_addr), ip_2_ip6(&remote_addr)); + IP_SET_TYPE_VAL(remote_addr, IPADDR_TYPE_V4); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + err = netconn_connect(sock->conn, &remote_addr, remote_port); + } + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) failed, err=%d\n", s, err)); + set_errno(err_to_errno(err)); + done_socket(sock); + return -1; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) succeeded\n", s)); + set_errno(0); + done_socket(sock); + return 0; +} + +/** + * Set a socket into listen mode. + * The socket may not have been used for another connection previously. + * + * @param s the socket to set to listening mode + * @param backlog (ATTENTION: needs TCP_LISTEN_BACKLOG=1) + * @return 0 on success, non-zero on failure + */ +int +lwip_listen(int s, int backlog) +{ + struct lwip_sock *sock; + err_t err; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d, backlog=%d)\n", s, backlog)); + + sock = get_socket(s); + if (!sock) { + return -1; + } + + /* limit the "backlog" parameter to fit in an u8_t */ + backlog = LWIP_MIN(LWIP_MAX(backlog, 0), 0xff); + + err = netconn_listen_with_backlog(sock->conn, (u8_t)backlog); + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d) failed, err=%d\n", s, err)); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + set_errno(EOPNOTSUPP); + } else { + set_errno(err_to_errno(err)); + } + done_socket(sock); + return -1; + } + + set_errno(0); + done_socket(sock); + return 0; +} + +#if LWIP_TCP +/* Helper function to loop over receiving pbufs from netconn + * until "len" bytes are received or we're otherwise done. + * Keeps sock->lastdata for peeking or partly copying. + */ +static ssize_t +lwip_recv_tcp(struct lwip_sock *sock, void *mem, size_t len, int flags) +{ + u8_t apiflags = NETCONN_NOAUTORCVD; + ssize_t recvd = 0; + ssize_t recv_left = (len <= SSIZE_MAX) ? (ssize_t)len : SSIZE_MAX; + + LWIP_ASSERT("no socket given", sock != NULL); + LWIP_ASSERT("this should be checked internally", NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP); + + if (flags & MSG_DONTWAIT) { + apiflags |= NETCONN_DONTBLOCK; + } + + do { + struct pbuf *p; + err_t err; + u16_t copylen; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recv_tcp: top while sock->lastdata=%p\n", (void *)sock->lastdata.pbuf)); + /* Check if there is data left from the last recv operation. */ + if (sock->lastdata.pbuf) { + p = sock->lastdata.pbuf; + } else { + /* No data was left from the previous operation, so we try to get + some from the network. */ + err = netconn_recv_tcp_pbuf_flags(sock->conn, &p, apiflags); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recv_tcp: netconn_recv err=%d, pbuf=%p\n", + err, (void *)p)); + + if (err != ERR_OK) { + if (recvd > 0) { + /* already received data, return that (this trusts in getting the same error from + netconn layer again next time netconn_recv is called) */ + goto lwip_recv_tcp_done; + } + /* We should really do some error checking here. */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recv_tcp: p == NULL, error is "%s"!\n", + lwip_strerr(err))); + set_errno(err_to_errno(err)); + if (err == ERR_CLSD) { + return 0; + } else { + return -1; + } + } + LWIP_ASSERT("p != NULL", p != NULL); + sock->lastdata.pbuf = p; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recv_tcp: buflen=%"U16_F" recv_left=%d off=%d\n", + p->tot_len, (int)recv_left, (int)recvd)); + + if (recv_left > p->tot_len) { + copylen = p->tot_len; + } else { + copylen = (u16_t)recv_left; + } + if (recvd > SSIZE_MAX - copylen) { + /* overflow */ + copylen = (u16_t)(SSIZE_MAX - recvd); + } + + /* copy the contents of the received buffer into + the supplied memory pointer mem */ + pbuf_copy_partial(p, (u8_t *)mem + recvd, copylen, 0); + + recvd += copylen; + + /* TCP combines multiple pbufs for one recv */ + LWIP_ASSERT("invalid copylen, len would underflow", recv_left >= copylen); + recv_left -= copylen; + + /* Unless we peek the incoming message... */ + if ((flags & MSG_PEEK) == 0) { + /* ... check if there is data left in the pbuf */ + LWIP_ASSERT("invalid copylen", p->tot_len >= copylen); + if (p->tot_len - copylen > 0) { + /* If so, it should be saved in the sock structure for the next recv call. + We store the pbuf but hide/free the consumed data: */ + sock->lastdata.pbuf = pbuf_free_header(p, copylen); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recv_tcp: lastdata now pbuf=%p\n", (void *)sock->lastdata.pbuf)); + } else { + sock->lastdata.pbuf = NULL; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recv_tcp: deleting pbuf=%p\n", (void *)p)); + pbuf_free(p); + } + } + /* once we have some data to return, only add more if we don't need to wait */ + apiflags |= NETCONN_DONTBLOCK | NETCONN_NOFIN; + /* @todo: do we need to support peeking more than one pbuf? */ + } while ((recv_left > 0) && !(flags & MSG_PEEK)); +lwip_recv_tcp_done: + if ((recvd > 0) && !(flags & MSG_PEEK)) { + /* ensure window update after copying all data */ + netconn_tcp_recvd(sock->conn, (size_t)recvd); + } + set_errno(0); + return recvd; +} +#endif + +/* Convert a netbuf's address data to struct sockaddr */ +static int +lwip_sock_make_addr(struct netconn *conn, ip_addr_t *fromaddr, u16_t port, + struct sockaddr *from, socklen_t *fromlen) +{ + int truncated = 0; + union sockaddr_aligned saddr; + + LWIP_UNUSED_ARG(conn); + + LWIP_ASSERT("fromaddr != NULL", fromaddr != NULL); + LWIP_ASSERT("from != NULL", from != NULL); + LWIP_ASSERT("fromlen != NULL", fromlen != NULL); + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Map IPv4 addresses to IPv4 mapped IPv6 */ + if (NETCONNTYPE_ISIPV6(netconn_type(conn)) && IP_IS_V4(fromaddr)) { + ip4_2_ipv4_mapped_ipv6(ip_2_ip6(fromaddr), ip_2_ip4(fromaddr)); + IP_SET_TYPE(fromaddr, IPADDR_TYPE_V6); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + IPADDR_PORT_TO_SOCKADDR(&saddr, fromaddr, port); + if (*fromlen < IPADDR_SOCKADDR_GET_LEN(&saddr)) { + truncated = 1; + } else if (*fromlen > IPADDR_SOCKADDR_GET_LEN(&saddr)) { + *fromlen = IPADDR_SOCKADDR_GET_LEN(&saddr); + } + MEMCPY(from, &saddr, *fromlen); + return truncated; +} + +#if LWIP_TCP +/* Helper function to get a tcp socket's remote address info */ +static int +lwip_recv_tcp_from(struct lwip_sock *sock, struct sockaddr *from, socklen_t *fromlen, const char *dbg_fn, int dbg_s, ssize_t dbg_ret) +{ + if (sock == NULL) { + return 0; + } + LWIP_UNUSED_ARG(dbg_fn); + LWIP_UNUSED_ARG(dbg_s); + LWIP_UNUSED_ARG(dbg_ret); + +#if !SOCKETS_DEBUG + if (from && fromlen) +#endif /* !SOCKETS_DEBUG */ + { + /* get remote addr/port from tcp_pcb */ + u16_t port; + ip_addr_t tmpaddr; + netconn_getaddr(sock->conn, &tmpaddr, &port, 0); + LWIP_DEBUGF(SOCKETS_DEBUG, ("%s(%d): addr=", dbg_fn, dbg_s)); + ip_addr_debug_print_val(SOCKETS_DEBUG, tmpaddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%d\n", port, (int)dbg_ret)); + if (from && fromlen) { + return lwip_sock_make_addr(sock->conn, &tmpaddr, port, from, fromlen); + } + } + return 0; +} +#endif + +/* Helper function to receive a netbuf from a udp or raw netconn. + * Keeps sock->lastdata for peeking. + */ +static err_t +lwip_recvfrom_udp_raw(struct lwip_sock *sock, int flags, struct msghdr *msg, u16_t *datagram_len, int dbg_s) +{ + struct netbuf *buf; + u8_t apiflags; + err_t err; + u16_t buflen, copylen, copied; + msg_iovlen_t i; + + LWIP_UNUSED_ARG(dbg_s); + LWIP_ERROR("lwip_recvfrom_udp_raw: invalid arguments", (msg->msg_iov != NULL) || (msg->msg_iovlen <= 0), return ERR_ARG;); + + if (flags & MSG_DONTWAIT) { + apiflags = NETCONN_DONTBLOCK; + } else { + apiflags = 0; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom_udp_raw[UDP/RAW]: top sock->lastdata=%p\n", (void *)sock->lastdata.netbuf)); + /* Check if there is data left from the last recv operation. */ + buf = sock->lastdata.netbuf; + if (buf == NULL) { + /* No data was left from the previous operation, so we try to get + some from the network. */ + err = netconn_recv_udp_raw_netbuf_flags(sock->conn, &buf, apiflags); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom_udp_raw[UDP/RAW]: netconn_recv err=%d, netbuf=%p\n", + err, (void *)buf)); + + if (err != ERR_OK) { + return err; + } + LWIP_ASSERT("buf != NULL", buf != NULL); + sock->lastdata.netbuf = buf; + } + buflen = buf->p->tot_len; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom_udp_raw: buflen=%"U16_F"\n", buflen)); + + copied = 0; + /* copy the pbuf payload into the iovs */ + for (i = 0; (i < msg->msg_iovlen) && (copied < buflen); i++) { + u16_t len_left = (u16_t)(buflen - copied); + if (msg->msg_iov[i].iov_len > len_left) { + copylen = len_left; + } else { + copylen = (u16_t)msg->msg_iov[i].iov_len; + } + + /* copy the contents of the received buffer into + the supplied memory buffer */ + pbuf_copy_partial(buf->p, (u8_t *)msg->msg_iov[i].iov_base, copylen, copied); + copied = (u16_t)(copied + copylen); + } + + /* Check to see from where the data was.*/ +#if !SOCKETS_DEBUG + if (msg->msg_name && msg->msg_namelen) +#endif /* !SOCKETS_DEBUG */ + { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom_udp_raw(%d): addr=", dbg_s)); + ip_addr_debug_print_val(SOCKETS_DEBUG, *netbuf_fromaddr(buf)); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%d\n", netbuf_fromport(buf), copied)); + if (msg->msg_name && msg->msg_namelen) { + lwip_sock_make_addr(sock->conn, netbuf_fromaddr(buf), netbuf_fromport(buf), + (struct sockaddr *)msg->msg_name, &msg->msg_namelen); + } + } + + /* Initialize flag output */ + msg->msg_flags = 0; + + if (msg->msg_control) { + u8_t wrote_msg = 0; +#if LWIP_NETBUF_RECVINFO + /* Check if packet info was recorded */ + if (buf->flags & NETBUF_FLAG_DESTADDR) { + if (IP_IS_V4(&buf->toaddr)) { +#if LWIP_IPV4 + if (msg->msg_controllen >= CMSG_SPACE(sizeof(struct in_pktinfo))) { + struct cmsghdr *chdr = CMSG_FIRSTHDR(msg); /* This will always return a header!! */ + struct in_pktinfo *pkti = (struct in_pktinfo *)CMSG_DATA(chdr); + chdr->cmsg_level = IPPROTO_IP; + chdr->cmsg_type = IP_PKTINFO; + chdr->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo)); + pkti->ipi_ifindex = buf->p->if_idx; + inet_addr_from_ip4addr(&pkti->ipi_addr, ip_2_ip4(netbuf_destaddr(buf))); + msg->msg_controllen = CMSG_SPACE(sizeof(struct in_pktinfo)); + wrote_msg = 1; + } else { + msg->msg_flags |= MSG_CTRUNC; + } +#endif /* LWIP_IPV4 */ + } + } +#endif /* LWIP_NETBUF_RECVINFO */ + + if (!wrote_msg) { + msg->msg_controllen = 0; + } + } + + /* If we don't peek the incoming message: zero lastdata pointer and free the netbuf */ + if ((flags & MSG_PEEK) == 0) { + sock->lastdata.netbuf = NULL; + netbuf_delete(buf); + } + if (datagram_len) { + *datagram_len = buflen; + } + return ERR_OK; +} + +ssize_t +lwip_recvfrom(int s, void *mem, size_t len, int flags, + struct sockaddr *from, socklen_t *fromlen) +{ + struct lwip_sock *sock; + ssize_t ret; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d, %p, %"SZT_F", 0x%x, ..)\n", s, mem, len, flags)); + sock = get_socket(s); + if (!sock) { + return -1; + } +#if LWIP_TCP + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { + ret = lwip_recv_tcp(sock, mem, len, flags); + lwip_recv_tcp_from(sock, from, fromlen, "lwip_recvfrom", s, ret); + done_socket(sock); + return ret; + } else +#endif + { + u16_t datagram_len = 0; + struct iovec vec; + struct msghdr msg; + err_t err; + vec.iov_base = mem; + vec.iov_len = len; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + msg.msg_iov = &vec; + msg.msg_iovlen = 1; + msg.msg_name = from; + msg.msg_namelen = (fromlen ? *fromlen : 0); + err = lwip_recvfrom_udp_raw(sock, flags, &msg, &datagram_len, s); + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom[UDP/RAW](%d): buf == NULL, error is "%s"!\n", + s, lwip_strerr(err))); + set_errno(err_to_errno(err)); + done_socket(sock); + return -1; + } + ret = (ssize_t)LWIP_MIN(LWIP_MIN(len, datagram_len), SSIZE_MAX); + if (fromlen) { + *fromlen = msg.msg_namelen; + } + } + + set_errno(0); + done_socket(sock); + return ret; +} + +ssize_t +lwip_read(int s, void *mem, size_t len) +{ + return lwip_recvfrom(s, mem, len, 0, NULL, NULL); +} + +ssize_t +lwip_readv(int s, const struct iovec *iov, int iovcnt) +{ + struct msghdr msg; + + msg.msg_name = NULL; + msg.msg_namelen = 0; + /* Hack: we have to cast via number to cast from 'const' pointer to non-const. + Blame the opengroup standard for this inconsistency. */ + msg.msg_iov = LWIP_CONST_CAST(struct iovec *, iov); + msg.msg_iovlen = iovcnt; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + return lwip_recvmsg(s, &msg, 0); +} + +ssize_t +lwip_recv(int s, void *mem, size_t len, int flags) +{ + return lwip_recvfrom(s, mem, len, flags, NULL, NULL); +} + +ssize_t +lwip_recvmsg(int s, struct msghdr *message, int flags) +{ + struct lwip_sock *sock; + msg_iovlen_t i; + ssize_t buflen; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvmsg(%d, message=%p, flags=0x%x)\n", s, (void *)message, flags)); + LWIP_ERROR("lwip_recvmsg: invalid message pointer", message != NULL, return ERR_ARG;); + LWIP_ERROR("lwip_recvmsg: unsupported flags", (flags & ~(MSG_PEEK|MSG_DONTWAIT)) == 0, + set_errno(EOPNOTSUPP); return -1;); + + if ((message->msg_iovlen <= 0) || (message->msg_iovlen > IOV_MAX)) { + set_errno(EMSGSIZE); + return -1; + } + + sock = get_socket(s); + if (!sock) { + return -1; + } + + /* check for valid vectors */ + buflen = 0; + for (i = 0; i < message->msg_iovlen; i++) { + if ((message->msg_iov[i].iov_base == NULL) || ((ssize_t)message->msg_iov[i].iov_len <= 0) || + ((size_t)(ssize_t)message->msg_iov[i].iov_len != message->msg_iov[i].iov_len) || + ((ssize_t)(buflen + (ssize_t)message->msg_iov[i].iov_len) <= 0)) { + set_errno(err_to_errno(ERR_VAL)); + done_socket(sock); + return -1; + } + buflen = (ssize_t)(buflen + (ssize_t)message->msg_iov[i].iov_len); + } + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { +#if LWIP_TCP + int recv_flags = flags; + message->msg_flags = 0; + /* recv the data */ + buflen = 0; + for (i = 0; i < message->msg_iovlen; i++) { + /* try to receive into this vector's buffer */ + ssize_t recvd_local = lwip_recv_tcp(sock, message->msg_iov[i].iov_base, message->msg_iov[i].iov_len, recv_flags); + if (recvd_local > 0) { + /* sum up received bytes */ + buflen += recvd_local; + } + if ((recvd_local < 0) || (recvd_local < (int)message->msg_iov[i].iov_len) || + (flags & MSG_PEEK)) { + /* returned prematurely (or peeking, which might actually be limitated to the first iov) */ + if (buflen <= 0) { + /* nothing received at all, propagate the error */ + buflen = recvd_local; + } + break; + } + /* pass MSG_DONTWAIT to lwip_recv_tcp() to prevent waiting for more data */ + recv_flags |= MSG_DONTWAIT; + } + if (buflen > 0) { + /* reset socket error since we have received something */ + set_errno(0); + } + /* " If the socket is connected, the msg_name and msg_namelen members shall be ignored." */ + done_socket(sock); + return buflen; +#else /* LWIP_TCP */ + set_errno(err_to_errno(ERR_ARG)); + done_socket(sock); + return -1; +#endif /* LWIP_TCP */ + } + /* else, UDP and RAW NETCONNs */ +#if LWIP_UDP || LWIP_RAW + { + u16_t datagram_len = 0; + err_t err; + err = lwip_recvfrom_udp_raw(sock, flags, message, &datagram_len, s); + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvmsg[UDP/RAW](%d): buf == NULL, error is "%s"!\n", + s, lwip_strerr(err))); + set_errno(err_to_errno(err)); + done_socket(sock); + return -1; + } + if (datagram_len > buflen) { + message->msg_flags |= MSG_TRUNC; + } + + set_errno(0); + done_socket(sock); + return (int)datagram_len; + } +#else /* LWIP_UDP || LWIP_RAW */ + set_errno(err_to_errno(ERR_ARG)); + done_socket(sock); + return -1; +#endif /* LWIP_UDP || LWIP_RAW */ +} + +ssize_t +lwip_send(int s, const void *data, size_t size, int flags) +{ + struct lwip_sock *sock; + err_t err; + u8_t write_flags; + size_t written; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d, data=%p, size=%"SZT_F", flags=0x%x)\n", + s, data, size, flags)); + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { +#if (LWIP_UDP || LWIP_RAW) + done_socket(sock); + return lwip_sendto(s, data, size, flags, NULL, 0); +#else /* (LWIP_UDP || LWIP_RAW) */ + set_errno(err_to_errno(ERR_ARG)); + done_socket(sock); + return -1; +#endif /* (LWIP_UDP || LWIP_RAW) */ + } + + write_flags = (u8_t)(NETCONN_COPY | + ((flags & MSG_MORE) ? NETCONN_MORE : 0) | + ((flags & MSG_DONTWAIT) ? NETCONN_DONTBLOCK : 0)); + written = 0; + err = netconn_write_partly(sock->conn, data, size, write_flags, &written); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) err=%d written=%"SZT_F"\n", s, err, written)); + set_errno(err_to_errno(err)); + done_socket(sock); + /* casting 'written' to ssize_t is OK here since the netconn API limits it to SSIZE_MAX */ + return (err == ERR_OK ? (ssize_t)written : -1); +} + +ssize_t +lwip_sendmsg(int s, const struct msghdr *msg, int flags) +{ + struct lwip_sock *sock; +#if LWIP_TCP + u8_t write_flags; + size_t written; +#endif + err_t err = ERR_OK; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + LWIP_ERROR("lwip_sendmsg: invalid msghdr", msg != NULL, + set_errno(err_to_errno(ERR_ARG)); done_socket(sock); return -1;); + LWIP_ERROR("lwip_sendmsg: invalid msghdr iov", msg->msg_iov != NULL, + set_errno(err_to_errno(ERR_ARG)); done_socket(sock); return -1;); + LWIP_ERROR("lwip_sendmsg: maximum iovs exceeded", (msg->msg_iovlen > 0) && (msg->msg_iovlen <= IOV_MAX), + set_errno(EMSGSIZE); done_socket(sock); return -1;); + LWIP_ERROR("lwip_sendmsg: unsupported flags", (flags & ~(MSG_DONTWAIT | MSG_MORE)) == 0, + set_errno(EOPNOTSUPP); done_socket(sock); return -1;); + + LWIP_UNUSED_ARG(msg->msg_control); + LWIP_UNUSED_ARG(msg->msg_controllen); + LWIP_UNUSED_ARG(msg->msg_flags); + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { +#if LWIP_TCP + write_flags = (u8_t)(NETCONN_COPY | + ((flags & MSG_MORE) ? NETCONN_MORE : 0) | + ((flags & MSG_DONTWAIT) ? NETCONN_DONTBLOCK : 0)); + + written = 0; + err = netconn_write_vectors_partly(sock->conn, (struct netvector *)msg->msg_iov, (u16_t)msg->msg_iovlen, write_flags, &written); + set_errno(err_to_errno(err)); + done_socket(sock); + /* casting 'written' to ssize_t is OK here since the netconn API limits it to SSIZE_MAX */ + return (err == ERR_OK ? (ssize_t)written : -1); +#else /* LWIP_TCP */ + set_errno(err_to_errno(ERR_ARG)); + done_socket(sock); + return -1; +#endif /* LWIP_TCP */ + } + /* else, UDP and RAW NETCONNs */ +#if LWIP_UDP || LWIP_RAW + { + struct netbuf chain_buf; + msg_iovlen_t i; + ssize_t size = 0; + + LWIP_UNUSED_ARG(flags); + LWIP_ERROR("lwip_sendmsg: invalid msghdr name", (((msg->msg_name == NULL) && (msg->msg_namelen == 0)) || + IS_SOCK_ADDR_LEN_VALID(msg->msg_namelen)), + set_errno(err_to_errno(ERR_ARG)); done_socket(sock); return -1;); + + /* initialize chain buffer with destination */ + memset(&chain_buf, 0, sizeof(struct netbuf)); + if (msg->msg_name) { + u16_t remote_port; + SOCKADDR_TO_IPADDR_PORT((const struct sockaddr *)msg->msg_name, &chain_buf.addr, remote_port); + netbuf_fromport(&chain_buf) = remote_port; + } +#if LWIP_NETIF_TX_SINGLE_PBUF + for (i = 0; i < msg->msg_iovlen; i++) { + size += msg->msg_iov[i].iov_len; + if ((msg->msg_iov[i].iov_len > INT_MAX) || (size < (int)msg->msg_iov[i].iov_len)) { + /* overflow */ + goto sendmsg_emsgsize; + } + } + if (size > 0xFFFF) { + /* overflow */ + goto sendmsg_emsgsize; + } + /* Allocate a new netbuf and copy the data into it. */ + if (netbuf_alloc(&chain_buf, (u16_t)size) == NULL) { + err = ERR_MEM; + } else { + /* flatten the IO vectors */ + size_t offset = 0; + for (i = 0; i < msg->msg_iovlen; i++) { + MEMCPY(&((u8_t *)chain_buf.p->payload)[offset], msg->msg_iov[i].iov_base, msg->msg_iov[i].iov_len); + offset += msg->msg_iov[i].iov_len; + } +#if LWIP_CHECKSUM_ON_COPY + { + /* This can be improved by using LWIP_CHKSUM_COPY() and aggregating the checksum for each IO vector */ + u16_t chksum = ~inet_chksum_pbuf(chain_buf.p); + netbuf_set_chksum(&chain_buf, chksum); + } +#endif /* LWIP_CHECKSUM_ON_COPY */ + err = ERR_OK; + } +#else /* LWIP_NETIF_TX_SINGLE_PBUF */ + /* create a chained netbuf from the IO vectors. NOTE: we assemble a pbuf chain + manually to avoid having to allocate, chain, and delete a netbuf for each iov */ + for (i = 0; i < msg->msg_iovlen; i++) { + struct pbuf *p; + if (msg->msg_iov[i].iov_len > 0xFFFF) { + /* overflow */ + goto sendmsg_emsgsize; + } + p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF); + if (p == NULL) { + err = ERR_MEM; /* let netbuf_delete() cleanup chain_buf */ + break; + } + p->payload = msg->msg_iov[i].iov_base; + p->len = p->tot_len = (u16_t)msg->msg_iov[i].iov_len; + /* netbuf empty, add new pbuf */ + if (chain_buf.p == NULL) { + chain_buf.p = chain_buf.ptr = p; + /* add pbuf to existing pbuf chain */ + } else { + if (chain_buf.p->tot_len + p->len > 0xffff) { + /* overflow */ + pbuf_free(p); + goto sendmsg_emsgsize; + } + pbuf_cat(chain_buf.p, p); + } + } + /* save size of total chain */ + if (err == ERR_OK) { + size = netbuf_len(&chain_buf); + } +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + + if (err == ERR_OK) { +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Unmap IPv4 mapped IPv6 addresses */ + if (IP_IS_V6_VAL(chain_buf.addr) && ip6_addr_isipv4mappedipv6(ip_2_ip6(&chain_buf.addr))) { + unmap_ipv4_mapped_ipv6(ip_2_ip4(&chain_buf.addr), ip_2_ip6(&chain_buf.addr)); + IP_SET_TYPE_VAL(chain_buf.addr, IPADDR_TYPE_V4); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + /* send the data */ + err = netconn_send(sock->conn, &chain_buf); + } + + /* deallocated the buffer */ + netbuf_free(&chain_buf); + + set_errno(err_to_errno(err)); + done_socket(sock); + return (err == ERR_OK ? size : -1); +sendmsg_emsgsize: + set_errno(EMSGSIZE); + netbuf_free(&chain_buf); + done_socket(sock); + return -1; + } +#else /* LWIP_UDP || LWIP_RAW */ + set_errno(err_to_errno(ERR_ARG)); + done_socket(sock); + return -1; +#endif /* LWIP_UDP || LWIP_RAW */ +} + +ssize_t +lwip_sendto(int s, const void *data, size_t size, int flags, + const struct sockaddr *to, socklen_t tolen) +{ + struct lwip_sock *sock; + err_t err; + u16_t short_size; + u16_t remote_port; + struct netbuf buf; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { +#if LWIP_TCP + done_socket(sock); + return lwip_send(s, data, size, flags); +#else /* LWIP_TCP */ + LWIP_UNUSED_ARG(flags); + set_errno(err_to_errno(ERR_ARG)); + done_socket(sock); + return -1; +#endif /* LWIP_TCP */ + } + + if (size > LWIP_MIN(0xFFFF, SSIZE_MAX)) { + /* cannot fit into one datagram (at least for us) */ + set_errno(EMSGSIZE); + done_socket(sock); + return -1; + } + short_size = (u16_t)size; + LWIP_ERROR("lwip_sendto: invalid address", (((to == NULL) && (tolen == 0)) || + (IS_SOCK_ADDR_LEN_VALID(tolen) && + ((to != NULL) && (IS_SOCK_ADDR_TYPE_VALID(to) && IS_SOCK_ADDR_ALIGNED(to))))), + set_errno(err_to_errno(ERR_ARG)); done_socket(sock); return -1;); + LWIP_UNUSED_ARG(tolen); + + /* initialize a buffer */ + buf.p = buf.ptr = NULL; +#if LWIP_CHECKSUM_ON_COPY + buf.flags = 0; +#endif /* LWIP_CHECKSUM_ON_COPY */ + if (to) { + SOCKADDR_TO_IPADDR_PORT(to, &buf.addr, remote_port); + } else { + remote_port = 0; + ip_addr_set_any(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)), &buf.addr); + } + netbuf_fromport(&buf) = remote_port; + + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_sendto(%d, data=%p, short_size=%"U16_F", flags=0x%x to=", + s, data, short_size, flags)); + ip_addr_debug_print_val(SOCKETS_DEBUG, buf.addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", remote_port)); + + /* make the buffer point to the data that should be sent */ +#if LWIP_NETIF_TX_SINGLE_PBUF + /* Allocate a new netbuf and copy the data into it. */ + if (netbuf_alloc(&buf, short_size) == NULL) { + err = ERR_MEM; + } else { +#if LWIP_CHECKSUM_ON_COPY + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_RAW) { + u16_t chksum = LWIP_CHKSUM_COPY(buf.p->payload, data, short_size); + netbuf_set_chksum(&buf, chksum); + } else +#endif /* LWIP_CHECKSUM_ON_COPY */ + { + MEMCPY(buf.p->payload, data, short_size); + } + err = ERR_OK; + } +#else /* LWIP_NETIF_TX_SINGLE_PBUF */ + err = netbuf_ref(&buf, data, short_size); +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + if (err == ERR_OK) { +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Unmap IPv4 mapped IPv6 addresses */ + if (IP_IS_V6_VAL(buf.addr) && ip6_addr_isipv4mappedipv6(ip_2_ip6(&buf.addr))) { + unmap_ipv4_mapped_ipv6(ip_2_ip4(&buf.addr), ip_2_ip6(&buf.addr)); + IP_SET_TYPE_VAL(buf.addr, IPADDR_TYPE_V4); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + /* send the data */ + err = netconn_send(sock->conn, &buf); + } + + /* deallocated the buffer */ + netbuf_free(&buf); + + set_errno(err_to_errno(err)); + done_socket(sock); + return (err == ERR_OK ? short_size : -1); +} + +int +lwip_socket(int domain, int type, int protocol) +{ + struct netconn *conn; + int i; + + LWIP_UNUSED_ARG(domain); /* @todo: check this */ + + /* create a netconn */ + switch (type) { + case SOCK_RAW: + conn = netconn_new_with_proto_and_callback(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_RAW), + (u8_t)protocol, DEFAULT_SOCKET_EVENTCB); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_RAW, %d) = ", + domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); + break; + case SOCK_DGRAM: + conn = netconn_new_with_callback(DOMAIN_TO_NETCONN_TYPE(domain, + ((protocol == IPPROTO_UDPLITE) ? NETCONN_UDPLITE : NETCONN_UDP)), + DEFAULT_SOCKET_EVENTCB); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_DGRAM, %d) = ", + domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); +#if LWIP_NETBUF_RECVINFO + if (conn) { + /* netconn layer enables pktinfo by default, sockets default to off */ + conn->flags &= ~NETCONN_FLAG_PKTINFO; + } +#endif /* LWIP_NETBUF_RECVINFO */ + break; + case SOCK_STREAM: + conn = netconn_new_with_callback(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_TCP), DEFAULT_SOCKET_EVENTCB); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_STREAM, %d) = ", + domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%d, %d/UNKNOWN, %d) = -1\n", + domain, type, protocol)); + set_errno(EINVAL); + return -1; + } + + if (!conn) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n")); + set_errno(ENOBUFS); + return -1; + } + + i = alloc_socket(conn, 0); + + if (i == -1) { + netconn_delete(conn); + set_errno(ENFILE); + return -1; + } + conn->callback_arg.socket = i; + done_socket(&sockets[i - LWIP_SOCKET_OFFSET]); + LWIP_DEBUGF(SOCKETS_DEBUG, ("%d\n", i)); + set_errno(0); + return i; +} + +ssize_t +lwip_write(int s, const void *data, size_t size) +{ + return lwip_send(s, data, size, 0); +} + +ssize_t +lwip_writev(int s, const struct iovec *iov, int iovcnt) +{ + struct msghdr msg; + + msg.msg_name = NULL; + msg.msg_namelen = 0; + /* Hack: we have to cast via number to cast from 'const' pointer to non-const. + Blame the opengroup standard for this inconsistency. */ + msg.msg_iov = LWIP_CONST_CAST(struct iovec *, iov); + msg.msg_iovlen = iovcnt; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + return lwip_sendmsg(s, &msg, 0); +} + +#if LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL +/* Add select_cb to select_cb_list. */ +static void +lwip_link_select_cb(struct lwip_select_cb *select_cb) +{ + LWIP_SOCKET_SELECT_DECL_PROTECT(lev); + + /* Protect the select_cb_list */ + LWIP_SOCKET_SELECT_PROTECT(lev); + + /* Put this select_cb on top of list */ + select_cb->next = select_cb_list; + if (select_cb_list != NULL) { + select_cb_list->prev = select_cb; + } + select_cb_list = select_cb; +#if !LWIP_TCPIP_CORE_LOCKING + /* Increasing this counter tells select_check_waiters that the list has changed. */ + select_cb_ctr++; +#endif + + /* Now we can safely unprotect */ + LWIP_SOCKET_SELECT_UNPROTECT(lev); +} + +/* Remove select_cb from select_cb_list. */ +static void +lwip_unlink_select_cb(struct lwip_select_cb *select_cb) +{ + LWIP_SOCKET_SELECT_DECL_PROTECT(lev); + + /* Take us off the list */ + LWIP_SOCKET_SELECT_PROTECT(lev); + if (select_cb->next != NULL) { + select_cb->next->prev = select_cb->prev; + } + if (select_cb_list == select_cb) { + LWIP_ASSERT("select_cb->prev == NULL", select_cb->prev == NULL); + select_cb_list = select_cb->next; + } else { + LWIP_ASSERT("select_cb->prev != NULL", select_cb->prev != NULL); + select_cb->prev->next = select_cb->next; + } +#if !LWIP_TCPIP_CORE_LOCKING + /* Increasing this counter tells select_check_waiters that the list has changed. */ + select_cb_ctr++; +#endif + LWIP_SOCKET_SELECT_UNPROTECT(lev); +} +#endif /* LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL */ + +#if LWIP_SOCKET_SELECT +/** + * Go through the readset and writeset lists and see which socket of the sockets + * set in the sets has events. On return, readset, writeset and exceptset have + * the sockets enabled that had events. + * + * @param maxfdp1 the highest socket index in the sets + * @param readset_in set of sockets to check for read events + * @param writeset_in set of sockets to check for write events + * @param exceptset_in set of sockets to check for error events + * @param readset_out set of sockets that had read events + * @param writeset_out set of sockets that had write events + * @param exceptset_out set os sockets that had error events + * @return number of sockets that had events (read/write/exception) (>= 0) + */ +static int +lwip_selscan(int maxfdp1, fd_set *readset_in, fd_set *writeset_in, fd_set *exceptset_in, + fd_set *readset_out, fd_set *writeset_out, fd_set *exceptset_out) +{ + int i, nready = 0; + fd_set lreadset, lwriteset, lexceptset; + struct lwip_sock *sock; + SYS_ARCH_DECL_PROTECT(lev); + + FD_ZERO(&lreadset); + FD_ZERO(&lwriteset); + FD_ZERO(&lexceptset); + + /* Go through each socket in each list to count number of sockets which + currently match */ + for (i = LWIP_SOCKET_OFFSET; i < maxfdp1; i++) { + /* if this FD is not in the set, continue */ + if (!(readset_in && FD_ISSET(i, readset_in)) && + !(writeset_in && FD_ISSET(i, writeset_in)) && + !(exceptset_in && FD_ISSET(i, exceptset_in))) { + continue; + } + /* First get the socket's status (protected)... */ + SYS_ARCH_PROTECT(lev); + sock = tryget_socket_unconn_locked(i); + if (sock != NULL) { + void *lastdata = sock->lastdata.pbuf; + s16_t rcvevent = sock->rcvevent; + u16_t sendevent = sock->sendevent; + u16_t errevent = sock->errevent; + SYS_ARCH_UNPROTECT(lev); + + /* ... then examine it: */ + /* See if netconn of this socket is ready for read */ + if (readset_in && FD_ISSET(i, readset_in) && ((lastdata != NULL) || (rcvevent > 0))) { + FD_SET(i, &lreadset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for reading\n", i)); + nready++; + } + /* See if netconn of this socket is ready for write */ + if (writeset_in && FD_ISSET(i, writeset_in) && (sendevent != 0)) { + FD_SET(i, &lwriteset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for writing\n", i)); + nready++; + } + /* See if netconn of this socket had an error */ + if (exceptset_in && FD_ISSET(i, exceptset_in) && (errevent != 0)) { + FD_SET(i, &lexceptset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for exception\n", i)); + nready++; + } + done_socket(sock); + } else { + SYS_ARCH_UNPROTECT(lev); + /* no a valid open socket */ + return -1; + } + } + /* copy local sets to the ones provided as arguments */ + *readset_out = lreadset; + *writeset_out = lwriteset; + *exceptset_out = lexceptset; + + LWIP_ASSERT("nready >= 0", nready >= 0); + return nready; +} + +#if LWIP_NETCONN_FULLDUPLEX +/* Mark all of the set sockets in one of the three fdsets passed to select as used. + * All sockets are marked (and later unmarked), whether they are open or not. + * This is OK as lwip_selscan aborts select when non-open sockets are found. + */ +static void +lwip_select_inc_sockets_used_set(int maxfdp, fd_set *fdset, fd_set *used_sockets) +{ + SYS_ARCH_DECL_PROTECT(lev); + if (fdset) { + int i; + for (i = LWIP_SOCKET_OFFSET; i < maxfdp; i++) { + /* if this FD is in the set, lock it (unless already done) */ + if (FD_ISSET(i, fdset) && !FD_ISSET(i, used_sockets)) { + struct lwip_sock *sock; + SYS_ARCH_PROTECT(lev); + sock = tryget_socket_unconn_locked(i); + if (sock != NULL) { + /* leave the socket used until released by lwip_select_dec_sockets_used */ + FD_SET(i, used_sockets); + } + SYS_ARCH_UNPROTECT(lev); + } + } + } +} + +/* Mark all sockets passed to select as used to prevent them from being freed + * from other threads while select is running. + * Marked sockets are added to 'used_sockets' to mark them only once an be able + * to unmark them correctly. + */ +static void +lwip_select_inc_sockets_used(int maxfdp, fd_set *fdset1, fd_set *fdset2, fd_set *fdset3, fd_set *used_sockets) +{ + FD_ZERO(used_sockets); + lwip_select_inc_sockets_used_set(maxfdp, fdset1, used_sockets); + lwip_select_inc_sockets_used_set(maxfdp, fdset2, used_sockets); + lwip_select_inc_sockets_used_set(maxfdp, fdset3, used_sockets); +} + +/* Let go all sockets that were marked as used when starting select */ +static void +lwip_select_dec_sockets_used(int maxfdp, fd_set *used_sockets) +{ + int i; + for (i = LWIP_SOCKET_OFFSET; i < maxfdp; i++) { + /* if this FD is not in the set, continue */ + if (FD_ISSET(i, used_sockets)) { + struct lwip_sock *sock = tryget_socket_unconn_nouse(i); + LWIP_ASSERT("socket gone at the end of select", sock != NULL); + if (sock != NULL) { + done_socket(sock); + } + } + } +} +#else /* LWIP_NETCONN_FULLDUPLEX */ +#define lwip_select_inc_sockets_used(maxfdp1, readset, writeset, exceptset, used_sockets) +#define lwip_select_dec_sockets_used(maxfdp1, used_sockets) +#endif /* LWIP_NETCONN_FULLDUPLEX */ + +int +lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, + struct timeval *timeout) +{ + u32_t waitres = 0; + int nready; + fd_set lreadset, lwriteset, lexceptset; + u32_t msectimeout; + int i; + int maxfdp2; +#if LWIP_NETCONN_SEM_PER_THREAD + int waited = 0; +#endif +#if LWIP_NETCONN_FULLDUPLEX + fd_set used_sockets; +#endif + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select(%d, %p, %p, %p, tvsec=%"S32_F" tvusec=%"S32_F")\n", + maxfdp1, (void *)readset, (void *) writeset, (void *) exceptset, + timeout ? (s32_t)timeout->tv_sec : (s32_t) - 1, + timeout ? (s32_t)timeout->tv_usec : (s32_t) - 1)); + + if ((maxfdp1 < 0) || (maxfdp1 > LWIP_SELECT_MAXNFDS)) { + set_errno(EINVAL); + return -1; + } + + lwip_select_inc_sockets_used(maxfdp1, readset, writeset, exceptset, &used_sockets); + + /* Go through each socket in each list to count number of sockets which + currently match */ + nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset); + + if (nready < 0) { + /* one of the sockets in one of the fd_sets was invalid */ + set_errno(EBADF); + lwip_select_dec_sockets_used(maxfdp1, &used_sockets); + return -1; + } else if (nready > 0) { + /* one or more sockets are set, no need to wait */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: nready=%d\n", nready)); + } else { + /* If we don't have any current events, then suspend if we are supposed to */ + if (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: no timeout, returning 0\n")); + /* This is OK as the local fdsets are empty and nready is zero, + or we would have returned earlier. */ + } else { + /* None ready: add our semaphore to list: + We don't actually need any dynamic memory. Our entry on the + list is only valid while we are in this function, so it's ok + to use local variables (unless we're running in MPU compatible + mode). */ + API_SELECT_CB_VAR_DECLARE(select_cb); + API_SELECT_CB_VAR_ALLOC(select_cb, set_errno(ENOMEM); lwip_select_dec_sockets_used(maxfdp1, &used_sockets); return -1); + memset(&API_SELECT_CB_VAR_REF(select_cb), 0, sizeof(struct lwip_select_cb)); + + API_SELECT_CB_VAR_REF(select_cb).readset = readset; + API_SELECT_CB_VAR_REF(select_cb).writeset = writeset; + API_SELECT_CB_VAR_REF(select_cb).exceptset = exceptset; +#if LWIP_NETCONN_SEM_PER_THREAD + API_SELECT_CB_VAR_REF(select_cb).sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else /* LWIP_NETCONN_SEM_PER_THREAD */ + if (sys_sem_new(&API_SELECT_CB_VAR_REF(select_cb).sem, 0) != ERR_OK) { + /* failed to create semaphore */ + set_errno(ENOMEM); + lwip_select_dec_sockets_used(maxfdp1, &used_sockets); + API_SELECT_CB_VAR_FREE(select_cb); + return -1; + } +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + lwip_link_select_cb(&API_SELECT_CB_VAR_REF(select_cb)); + + /* Increase select_waiting for each socket we are interested in */ + maxfdp2 = maxfdp1; + for (i = LWIP_SOCKET_OFFSET; i < maxfdp1; i++) { + if ((readset && FD_ISSET(i, readset)) || + (writeset && FD_ISSET(i, writeset)) || + (exceptset && FD_ISSET(i, exceptset))) { + struct lwip_sock *sock; + SYS_ARCH_PROTECT(lev); + sock = tryget_socket_unconn_locked(i); + if (sock != NULL) { + sock->select_waiting++; + if (sock->select_waiting == 0) { + /* overflow - too many threads waiting */ + sock->select_waiting--; + nready = -1; + maxfdp2 = i; + SYS_ARCH_UNPROTECT(lev); + done_socket(sock); + set_errno(EBUSY); + break; + } + SYS_ARCH_UNPROTECT(lev); + done_socket(sock); + } else { + /* Not a valid socket */ + nready = -1; + maxfdp2 = i; + SYS_ARCH_UNPROTECT(lev); + set_errno(EBADF); + break; + } + } + } + + if (nready >= 0) { + /* Call lwip_selscan again: there could have been events between + the last scan (without us on the list) and putting us on the list! */ + nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset); + if (nready < 0) { + set_errno(EBADF); + } else if (!nready) { + /* Still none ready, just wait to be woken */ + if (timeout == NULL) { + /* Wait forever */ + msectimeout = 0; + } else { + long msecs_long = ((timeout->tv_sec * 1000) + ((timeout->tv_usec + 500) / 1000)); + if (msecs_long <= 0) { + /* Wait 1ms at least (0 means wait forever) */ + msectimeout = 1; + } else { + msectimeout = (u32_t)msecs_long; + } + } + + waitres = sys_arch_sem_wait(SELECT_SEM_PTR(API_SELECT_CB_VAR_REF(select_cb).sem), msectimeout); +#if LWIP_NETCONN_SEM_PER_THREAD + waited = 1; +#endif + } + } + + /* Decrease select_waiting for each socket we are interested in */ + for (i = LWIP_SOCKET_OFFSET; i < maxfdp2; i++) { + if ((readset && FD_ISSET(i, readset)) || + (writeset && FD_ISSET(i, writeset)) || + (exceptset && FD_ISSET(i, exceptset))) { + struct lwip_sock *sock; + SYS_ARCH_PROTECT(lev); + sock = tryget_socket_unconn_nouse(i); + LWIP_ASSERT("socket gone at the end of select", sock != NULL); + if (sock != NULL) { + /* for now, handle select_waiting==0... */ + LWIP_ASSERT("sock->select_waiting > 0", sock->select_waiting > 0); + if (sock->select_waiting > 0) { + sock->select_waiting--; + } + SYS_ARCH_UNPROTECT(lev); + } else { + SYS_ARCH_UNPROTECT(lev); + /* Not a valid socket */ + nready = -1; + set_errno(EBADF); + } + } + } + + lwip_unlink_select_cb(&API_SELECT_CB_VAR_REF(select_cb)); + +#if LWIP_NETCONN_SEM_PER_THREAD + if (API_SELECT_CB_VAR_REF(select_cb).sem_signalled && (!waited || (waitres == SYS_ARCH_TIMEOUT))) { + /* don't leave the thread-local semaphore signalled */ + sys_arch_sem_wait(API_SELECT_CB_VAR_REF(select_cb).sem, 1); + } +#else /* LWIP_NETCONN_SEM_PER_THREAD */ + sys_sem_free(&API_SELECT_CB_VAR_REF(select_cb).sem); +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + API_SELECT_CB_VAR_FREE(select_cb); + + if (nready < 0) { + /* This happens when a socket got closed while waiting */ + lwip_select_dec_sockets_used(maxfdp1, &used_sockets); + return -1; + } + + if (waitres == SYS_ARCH_TIMEOUT) { + /* Timeout */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: timeout expired\n")); + /* This is OK as the local fdsets are empty and nready is zero, + or we would have returned earlier. */ + } else { + /* See what's set now after waiting */ + nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: nready=%d\n", nready)); + if (nready < 0) { + set_errno(EBADF); + lwip_select_dec_sockets_used(maxfdp1, &used_sockets); + return -1; + } + } + } + } + + lwip_select_dec_sockets_used(maxfdp1, &used_sockets); + set_errno(0); + if (readset) { + *readset = lreadset; + } + if (writeset) { + *writeset = lwriteset; + } + if (exceptset) { + *exceptset = lexceptset; + } + return nready; +} +#endif /* LWIP_SOCKET_SELECT */ + +#if LWIP_SOCKET_POLL +/** Options for the lwip_pollscan function. */ +enum lwip_pollscan_opts +{ + /** Clear revents in each struct pollfd. */ + LWIP_POLLSCAN_CLEAR = 1, + + /** Increment select_waiting in each struct lwip_sock. */ + LWIP_POLLSCAN_INC_WAIT = 2, + + /** Decrement select_waiting in each struct lwip_sock. */ + LWIP_POLLSCAN_DEC_WAIT = 4 +}; + +/** + * Update revents in each struct pollfd. + * Optionally update select_waiting in struct lwip_sock. + * + * @param fds array of structures to update + * @param nfds number of structures in fds + * @param opts what to update and how + * @return number of structures that have revents != 0 + */ +static int +lwip_pollscan(struct pollfd *fds, nfds_t nfds, enum lwip_pollscan_opts opts) +{ + int nready = 0; + nfds_t fdi; + struct lwip_sock *sock; + SYS_ARCH_DECL_PROTECT(lev); + + /* Go through each struct pollfd in the array. */ + for (fdi = 0; fdi < nfds; fdi++) { + if ((opts & LWIP_POLLSCAN_CLEAR) != 0) { + fds[fdi].revents = 0; + } + + /* Negative fd means the caller wants us to ignore this struct. + POLLNVAL means we already detected that the fd is invalid; + if another thread has since opened a new socket with that fd, + we must not use that socket. */ + if (fds[fdi].fd >= 0 && (fds[fdi].revents & POLLNVAL) == 0) { + /* First get the socket's status (protected)... */ + SYS_ARCH_PROTECT(lev); + sock = tryget_socket_unconn_locked(fds[fdi].fd); + if (sock != NULL) { + void* lastdata = sock->lastdata.pbuf; + s16_t rcvevent = sock->rcvevent; + u16_t sendevent = sock->sendevent; + u16_t errevent = sock->errevent; + + if ((opts & LWIP_POLLSCAN_INC_WAIT) != 0) { + sock->select_waiting++; + if (sock->select_waiting == 0) { + /* overflow - too many threads waiting */ + sock->select_waiting--; + nready = -1; + SYS_ARCH_UNPROTECT(lev); + done_socket(sock); + break; + } + } else if ((opts & LWIP_POLLSCAN_DEC_WAIT) != 0) { + /* for now, handle select_waiting==0... */ + LWIP_ASSERT("sock->select_waiting > 0", sock->select_waiting > 0); + if (sock->select_waiting > 0) { + sock->select_waiting--; + } + } + SYS_ARCH_UNPROTECT(lev); + done_socket(sock); + + /* ... then examine it: */ + /* See if netconn of this socket is ready for read */ + if ((fds[fdi].events & POLLIN) != 0 && ((lastdata != NULL) || (rcvevent > 0))) { + fds[fdi].revents |= POLLIN; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_pollscan: fd=%d ready for reading\n", fds[fdi].fd)); + } + /* See if netconn of this socket is ready for write */ + if ((fds[fdi].events & POLLOUT) != 0 && (sendevent != 0)) { + fds[fdi].revents |= POLLOUT; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_pollscan: fd=%d ready for writing\n", fds[fdi].fd)); + } + /* See if netconn of this socket had an error */ + if (errevent != 0) { + /* POLLERR is output only. */ + fds[fdi].revents |= POLLERR; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_pollscan: fd=%d ready for exception\n", fds[fdi].fd)); + } + } else { + /* Not a valid socket */ + SYS_ARCH_UNPROTECT(lev); + /* POLLNVAL is output only. */ + fds[fdi].revents |= POLLNVAL; + return -1; + } + } + + /* Will return the number of structures that have events, + not the number of events. */ + if (fds[fdi].revents != 0) { + nready++; + } + } + + LWIP_ASSERT("nready >= 0", nready >= 0); + return nready; +} + +#if LWIP_NETCONN_FULLDUPLEX +/* Mark all sockets as used. + * + * All sockets are marked (and later unmarked), whether they are open or not. + * This is OK as lwip_pollscan aborts select when non-open sockets are found. + */ +static void +lwip_poll_inc_sockets_used(struct pollfd *fds, nfds_t nfds) +{ + nfds_t fdi; + + if(fds) { + /* Go through each struct pollfd in the array. */ + for (fdi = 0; fdi < nfds; fdi++) { + /* Increase the reference counter */ + tryget_socket_unconn(fds[fdi].fd); + } + } +} + +/* Let go all sockets that were marked as used when starting poll */ +static void +lwip_poll_dec_sockets_used(struct pollfd *fds, nfds_t nfds) +{ + nfds_t fdi; + + if(fds) { + /* Go through each struct pollfd in the array. */ + for (fdi = 0; fdi < nfds; fdi++) { + struct lwip_sock *sock = tryget_socket_unconn_nouse(fds[fdi].fd); + if (sock != NULL) { + done_socket(sock); + } + } + } +} +#else /* LWIP_NETCONN_FULLDUPLEX */ +#define lwip_poll_inc_sockets_used(fds, nfds) +#define lwip_poll_dec_sockets_used(fds, nfds) +#endif /* LWIP_NETCONN_FULLDUPLEX */ + +int +lwip_poll(struct pollfd *fds, nfds_t nfds, int timeout) +{ + u32_t waitres = 0; + int nready; + u32_t msectimeout; +#if LWIP_NETCONN_SEM_PER_THREAD + int waited = 0; +#endif + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_poll(%p, %d, %d)\n", + (void*)fds, (int)nfds, timeout)); + LWIP_ERROR("lwip_poll: invalid fds", ((fds != NULL && nfds > 0) || (fds == NULL && nfds == 0)), + set_errno(EINVAL); return -1;); + + lwip_poll_inc_sockets_used(fds, nfds); + + /* Go through each struct pollfd to count number of structures + which currently match */ + nready = lwip_pollscan(fds, nfds, LWIP_POLLSCAN_CLEAR); + + if (nready < 0) { + lwip_poll_dec_sockets_used(fds, nfds); + return -1; + } + + /* If we don't have any current events, then suspend if we are supposed to */ + if (!nready) { + API_SELECT_CB_VAR_DECLARE(select_cb); + + if (timeout == 0) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_poll: no timeout, returning 0\n")); + goto return_success; + } + API_SELECT_CB_VAR_ALLOC(select_cb, set_errno(EAGAIN); lwip_poll_dec_sockets_used(fds, nfds); return -1); + memset(&API_SELECT_CB_VAR_REF(select_cb), 0, sizeof(struct lwip_select_cb)); + + /* None ready: add our semaphore to list: + We don't actually need any dynamic memory. Our entry on the + list is only valid while we are in this function, so it's ok + to use local variables. */ + + API_SELECT_CB_VAR_REF(select_cb).poll_fds = fds; + API_SELECT_CB_VAR_REF(select_cb).poll_nfds = nfds; +#if LWIP_NETCONN_SEM_PER_THREAD + API_SELECT_CB_VAR_REF(select_cb).sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else /* LWIP_NETCONN_SEM_PER_THREAD */ + if (sys_sem_new(&API_SELECT_CB_VAR_REF(select_cb).sem, 0) != ERR_OK) { + /* failed to create semaphore */ + set_errno(EAGAIN); + lwip_poll_dec_sockets_used(fds, nfds); + API_SELECT_CB_VAR_FREE(select_cb); + return -1; + } +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + lwip_link_select_cb(&API_SELECT_CB_VAR_REF(select_cb)); + + /* Increase select_waiting for each socket we are interested in. + Also, check for events again: there could have been events between + the last scan (without us on the list) and putting us on the list! */ + nready = lwip_pollscan(fds, nfds, LWIP_POLLSCAN_INC_WAIT); + + if (!nready) { + /* Still none ready, just wait to be woken */ + if (timeout < 0) { + /* Wait forever */ + msectimeout = 0; + } else { + /* timeout == 0 would have been handled earlier. */ + LWIP_ASSERT("timeout > 0", timeout > 0); + msectimeout = timeout; + } + waitres = sys_arch_sem_wait(SELECT_SEM_PTR(API_SELECT_CB_VAR_REF(select_cb).sem), msectimeout); +#if LWIP_NETCONN_SEM_PER_THREAD + waited = 1; +#endif + } + + /* Decrease select_waiting for each socket we are interested in, + and check which events occurred while we waited. */ + nready = lwip_pollscan(fds, nfds, LWIP_POLLSCAN_DEC_WAIT); + + lwip_unlink_select_cb(&API_SELECT_CB_VAR_REF(select_cb)); + +#if LWIP_NETCONN_SEM_PER_THREAD + if (select_cb.sem_signalled && (!waited || (waitres == SYS_ARCH_TIMEOUT))) { + /* don't leave the thread-local semaphore signalled */ + sys_arch_sem_wait(API_SELECT_CB_VAR_REF(select_cb).sem, 1); + } +#else /* LWIP_NETCONN_SEM_PER_THREAD */ + sys_sem_free(&API_SELECT_CB_VAR_REF(select_cb).sem); +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + API_SELECT_CB_VAR_FREE(select_cb); + + if (nready < 0) { + /* This happens when a socket got closed while waiting */ + lwip_poll_dec_sockets_used(fds, nfds); + return -1; + } + + if (waitres == SYS_ARCH_TIMEOUT) { + /* Timeout */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_poll: timeout expired\n")); + goto return_success; + } + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_poll: nready=%d\n", nready)); +return_success: + lwip_poll_dec_sockets_used(fds, nfds); + set_errno(0); + return nready; +} + +/** + * Check whether event_callback should wake up a thread waiting in + * lwip_poll. + */ +static int +lwip_poll_should_wake(const struct lwip_select_cb *scb, int fd, int has_recvevent, int has_sendevent, int has_errevent) +{ + nfds_t fdi; + for (fdi = 0; fdi < scb->poll_nfds; fdi++) { + const struct pollfd *pollfd = &scb->poll_fds[fdi]; + if (pollfd->fd == fd) { + /* Do not update pollfd->revents right here; + that would be a data race because lwip_pollscan + accesses revents without protecting. */ + if (has_recvevent && (pollfd->events & POLLIN) != 0) { + return 1; + } + if (has_sendevent && (pollfd->events & POLLOUT) != 0) { + return 1; + } + if (has_errevent) { + /* POLLERR is output only. */ + return 1; + } + } + } + return 0; +} +#endif /* LWIP_SOCKET_POLL */ + +#if LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL +/** + * Callback registered in the netconn layer for each socket-netconn. + * Processes recvevent (data available) and wakes up tasks waiting for select. + * + * @note for LWIP_TCPIP_CORE_LOCKING any caller of this function + * must have the core lock held when signaling the following events + * as they might cause select_list_cb to be checked: + * NETCONN_EVT_RCVPLUS + * NETCONN_EVT_SENDPLUS + * NETCONN_EVT_ERROR + * This requirement will be asserted in select_check_waiters() + */ +static void +event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len) +{ + int s, check_waiters; + struct lwip_sock *sock; + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_UNUSED_ARG(len); + + /* Get socket */ + if (conn) { + s = conn->callback_arg.socket; + if (s < 0) { + /* Data comes in right away after an accept, even though + * the server task might not have created a new socket yet. + * Just count down (or up) if that's the case and we + * will use the data later. Note that only receive events + * can happen before the new socket is set up. */ + SYS_ARCH_PROTECT(lev); + if (conn->callback_arg.socket < 0) { + if (evt == NETCONN_EVT_RCVPLUS) { + /* conn->socket is -1 on initialization + lwip_accept adjusts sock->recvevent if conn->socket < -1 */ + conn->callback_arg.socket--; + } + SYS_ARCH_UNPROTECT(lev); + return; + } + s = conn->callback_arg.socket; + SYS_ARCH_UNPROTECT(lev); + } + + sock = get_socket(s); + if (!sock) { + return; + } + } else { + return; + } + + check_waiters = 1; + SYS_ARCH_PROTECT(lev); + /* Set event as required */ + switch (evt) { + case NETCONN_EVT_RCVPLUS: + sock->rcvevent++; + if (sock->rcvevent > 1) { + check_waiters = 0; + } + break; + case NETCONN_EVT_RCVMINUS: + sock->rcvevent--; + check_waiters = 0; + break; + case NETCONN_EVT_SENDPLUS: + if (sock->sendevent) { + check_waiters = 0; + } + sock->sendevent = 1; + break; + case NETCONN_EVT_SENDMINUS: + sock->sendevent = 0; + check_waiters = 0; + break; + case NETCONN_EVT_ERROR: + sock->errevent = 1; + break; + default: + LWIP_ASSERT("unknown event", 0); + break; + } + + if (sock->select_waiting && check_waiters) { + /* Save which events are active */ + int has_recvevent, has_sendevent, has_errevent; + has_recvevent = sock->rcvevent > 0; + has_sendevent = sock->sendevent != 0; + has_errevent = sock->errevent != 0; + SYS_ARCH_UNPROTECT(lev); + /* Check any select calls waiting on this socket */ + select_check_waiters(s, has_recvevent, has_sendevent, has_errevent); + } else { + SYS_ARCH_UNPROTECT(lev); + } + done_socket(sock); +} + +/** + * Check if any select waiters are waiting on this socket and its events + * + * @note on synchronization of select_cb_list: + * LWIP_TCPIP_CORE_LOCKING: the select_cb_list must only be accessed while holding + * the core lock. We do a single pass through the list and signal any waiters. + * Core lock should already be held when calling here!!!! + + * !LWIP_TCPIP_CORE_LOCKING: we use SYS_ARCH_PROTECT but unlock on each iteration + * of the loop, thus creating a possibility where a thread could modify the + * select_cb_list during our UNPROTECT/PROTECT. We use a generational counter to + * detect this change and restart the list walk. The list is expected to be small + */ +static void select_check_waiters(int s, int has_recvevent, int has_sendevent, int has_errevent) +{ + struct lwip_select_cb *scb; +#if !LWIP_TCPIP_CORE_LOCKING + int last_select_cb_ctr; + SYS_ARCH_DECL_PROTECT(lev); +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + + LWIP_ASSERT_CORE_LOCKED(); + +#if !LWIP_TCPIP_CORE_LOCKING + SYS_ARCH_PROTECT(lev); +again: + /* remember the state of select_cb_list to detect changes */ + last_select_cb_ctr = select_cb_ctr; +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + for (scb = select_cb_list; scb != NULL; scb = scb->next) { + if (scb->sem_signalled == 0) { + /* semaphore not signalled yet */ + int do_signal = 0; +#if LWIP_SOCKET_POLL + if (scb->poll_fds != NULL) { + do_signal = lwip_poll_should_wake(scb, s, has_recvevent, has_sendevent, has_errevent); + } +#endif /* LWIP_SOCKET_POLL */ +#if LWIP_SOCKET_SELECT && LWIP_SOCKET_POLL + else +#endif /* LWIP_SOCKET_SELECT && LWIP_SOCKET_POLL */ +#if LWIP_SOCKET_SELECT + { + /* Test this select call for our socket */ + if (has_recvevent) { + if (scb->readset && FD_ISSET(s, scb->readset)) { + do_signal = 1; + } + } + if (has_sendevent) { + if (!do_signal && scb->writeset && FD_ISSET(s, scb->writeset)) { + do_signal = 1; + } + } + if (has_errevent) { + if (!do_signal && scb->exceptset && FD_ISSET(s, scb->exceptset)) { + do_signal = 1; + } + } + } +#endif /* LWIP_SOCKET_SELECT */ + if (do_signal) { + scb->sem_signalled = 1; + /* For !LWIP_TCPIP_CORE_LOCKING, we don't call SYS_ARCH_UNPROTECT() before signaling + the semaphore, as this might lead to the select thread taking itself off the list, + invalidating the semaphore. */ + sys_sem_signal(SELECT_SEM_PTR(scb->sem)); + } + } +#if LWIP_TCPIP_CORE_LOCKING + } +#else + /* unlock interrupts with each step */ + SYS_ARCH_UNPROTECT(lev); + /* this makes sure interrupt protection time is short */ + SYS_ARCH_PROTECT(lev); + if (last_select_cb_ctr != select_cb_ctr) { + /* someone has changed select_cb_list, restart at the beginning */ + goto again; + } + /* remember the state of select_cb_list to detect changes */ + last_select_cb_ctr = select_cb_ctr; + } + SYS_ARCH_UNPROTECT(lev); +#endif +} +#endif /* LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL */ + +/** + * Close one end of a full-duplex connection. + */ +int +lwip_shutdown(int s, int how) +{ + struct lwip_sock *sock; + err_t err; + u8_t shut_rx = 0, shut_tx = 0; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_shutdown(%d, how=%d)\n", s, how)); + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (sock->conn != NULL) { + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + set_errno(EOPNOTSUPP); + done_socket(sock); + return -1; + } + } else { + set_errno(ENOTCONN); + done_socket(sock); + return -1; + } + + if (how == SHUT_RD) { + shut_rx = 1; + } else if (how == SHUT_WR) { + shut_tx = 1; + } else if (how == SHUT_RDWR) { + shut_rx = 1; + shut_tx = 1; + } else { + set_errno(EINVAL); + done_socket(sock); + return -1; + } + err = netconn_shutdown(sock->conn, shut_rx, shut_tx); + + set_errno(err_to_errno(err)); + done_socket(sock); + return (err == ERR_OK ? 0 : -1); +} + +static int +lwip_getaddrname(int s, struct sockaddr *name, socklen_t *namelen, u8_t local) +{ + struct lwip_sock *sock; + union sockaddr_aligned saddr; + ip_addr_t naddr; + u16_t port; + err_t err; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + /* get the IP address and port */ + err = netconn_getaddr(sock->conn, &naddr, &port, local); + if (err != ERR_OK) { + set_errno(err_to_errno(err)); + done_socket(sock); + return -1; + } + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Map IPv4 addresses to IPv4 mapped IPv6 */ + if (NETCONNTYPE_ISIPV6(netconn_type(sock->conn)) && + IP_IS_V4_VAL(naddr)) { + ip4_2_ipv4_mapped_ipv6(ip_2_ip6(&naddr), ip_2_ip4(&naddr)); + IP_SET_TYPE_VAL(naddr, IPADDR_TYPE_V6); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + IPADDR_PORT_TO_SOCKADDR(&saddr, &naddr, port); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getaddrname(%d, addr=", s)); + ip_addr_debug_print_val(SOCKETS_DEBUG, naddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", port)); + + if (*namelen > IPADDR_SOCKADDR_GET_LEN(&saddr)) { + *namelen = IPADDR_SOCKADDR_GET_LEN(&saddr); + } + MEMCPY(name, &saddr, *namelen); + + set_errno(0); + done_socket(sock); + return 0; +} + +int +lwip_getpeername(int s, struct sockaddr *name, socklen_t *namelen) +{ + return lwip_getaddrname(s, name, namelen, 0); +} + +int +lwip_getsockname(int s, struct sockaddr *name, socklen_t *namelen) +{ + return lwip_getaddrname(s, name, namelen, 1); +} + +int +lwip_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen) +{ + int err; + struct lwip_sock *sock = get_socket(s); +#if !LWIP_TCPIP_CORE_LOCKING + err_t cberr; + LWIP_SETGETSOCKOPT_DATA_VAR_DECLARE(data); +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + + if (!sock) { + return -1; + } + + if ((NULL == optval) || (NULL == optlen)) { + set_errno(EFAULT); + done_socket(sock); + return -1; + } + +#if LWIP_TCPIP_CORE_LOCKING + /* core-locking can just call the -impl function */ + LOCK_TCPIP_CORE(); + err = lwip_getsockopt_impl(s, level, optname, optval, optlen); + UNLOCK_TCPIP_CORE(); + +#else /* LWIP_TCPIP_CORE_LOCKING */ + +#if LWIP_MPU_COMPATIBLE + /* MPU_COMPATIBLE copies the optval data, so check for max size here */ + if (*optlen > LWIP_SETGETSOCKOPT_MAXOPTLEN) { + set_errno(ENOBUFS); + done_socket(sock); + return -1; + } +#endif /* LWIP_MPU_COMPATIBLE */ + + LWIP_SETGETSOCKOPT_DATA_VAR_ALLOC(data, sock); + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).s = s; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).level = level; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optname = optname; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen = *optlen; +#if !LWIP_MPU_COMPATIBLE + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optval.p = optval; +#endif /* !LWIP_MPU_COMPATIBLE */ + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err = 0; +#if LWIP_NETCONN_SEM_PER_THREAD + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem = &sock->conn->op_completed; +#endif + cberr = tcpip_callback(lwip_getsockopt_callback, &LWIP_SETGETSOCKOPT_DATA_VAR_REF(data)); + if (cberr != ERR_OK) { + LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data); + set_errno(err_to_errno(cberr)); + done_socket(sock); + return -1; + } + sys_arch_sem_wait((sys_sem_t *)(LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem), 0); + + /* write back optlen and optval */ + *optlen = LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen; +#if LWIP_MPU_COMPATIBLE + MEMCPY(optval, LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optval, + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen); +#endif /* LWIP_MPU_COMPATIBLE */ + + /* maybe lwip_getsockopt_impl has changed err */ + err = LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err; + LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + + set_errno(err); + done_socket(sock); + return err ? -1 : 0; +} + +#if !LWIP_TCPIP_CORE_LOCKING +/** lwip_getsockopt_callback: only used without CORE_LOCKING + * to get into the tcpip_thread + */ +static void +lwip_getsockopt_callback(void *arg) +{ + struct lwip_setgetsockopt_data *data; + LWIP_ASSERT("arg != NULL", arg != NULL); + data = (struct lwip_setgetsockopt_data *)arg; + + data->err = lwip_getsockopt_impl(data->s, data->level, data->optname, +#if LWIP_MPU_COMPATIBLE + data->optval, +#else /* LWIP_MPU_COMPATIBLE */ + data->optval.p, +#endif /* LWIP_MPU_COMPATIBLE */ + &data->optlen); + + sys_sem_signal((sys_sem_t *)(data->completed_sem)); +} +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +static int +lwip_sockopt_to_ipopt(int optname) +{ + /* Map SO_* values to our internal SOF_* values + * We should not rely on #defines in socket.h + * being in sync with ip.h. + */ + switch (optname) { + case SO_BROADCAST: + return SOF_BROADCAST; + case SO_KEEPALIVE: + return SOF_KEEPALIVE; + case SO_REUSEADDR: + return SOF_REUSEADDR; + default: + LWIP_ASSERT("Unknown socket option", 0); + return 0; + } +} + +/** lwip_getsockopt_impl: the actual implementation of getsockopt: + * same argument as lwip_getsockopt, either called directly or through callback + */ +static int +lwip_getsockopt_impl(int s, int level, int optname, void *optval, socklen_t *optlen) +{ + int err = 0; + struct lwip_sock *sock = tryget_socket(s); + if (!sock) { + return EBADF; + } + +#ifdef LWIP_HOOK_SOCKETS_GETSOCKOPT + if (LWIP_HOOK_SOCKETS_GETSOCKOPT(s, sock, level, optname, optval, optlen, &err)) { + return err; + } +#endif + + switch (level) { + + /* Level: SOL_SOCKET */ + case SOL_SOCKET: + switch (optname) { + +#if LWIP_TCP + case SO_ACCEPTCONN: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_TCP) { + done_socket(sock); + return ENOPROTOOPT; + } + if ((sock->conn->pcb.tcp != NULL) && (sock->conn->pcb.tcp->state == LISTEN)) { + *(int *)optval = 1; + } else { + *(int *)optval = 0; + } + break; +#endif /* LWIP_TCP */ + + /* The option flags */ + case SO_BROADCAST: + case SO_KEEPALIVE: +#if SO_REUSE + case SO_REUSEADDR: +#endif /* SO_REUSE */ + if ((optname == SO_BROADCAST) && + (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP)) { + done_socket(sock); + return ENOPROTOOPT; + } + + optname = lwip_sockopt_to_ipopt(optname); + + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + *(int *)optval = ip_get_option(sock->conn->pcb.ip, optname); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, optname=0x%x, ..) = %s\n", + s, optname, (*(int *)optval ? "on" : "off"))); + break; + + case SO_TYPE: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, int); + switch (NETCONNTYPE_GROUP(netconn_type(sock->conn))) { + case NETCONN_RAW: + *(int *)optval = SOCK_RAW; + break; + case NETCONN_TCP: + *(int *)optval = SOCK_STREAM; + break; + case NETCONN_UDP: + *(int *)optval = SOCK_DGRAM; + break; + default: /* unrecognized socket type */ + *(int *)optval = netconn_type(sock->conn); + LWIP_DEBUGF(SOCKETS_DEBUG, + ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE): unrecognized socket type %d\n", + s, *(int *)optval)); + } /* switch (netconn_type(sock->conn)) */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE) = %d\n", + s, *(int *)optval)); + break; + + case SO_ERROR: + LWIP_SOCKOPT_CHECK_OPTLEN(sock, *optlen, int); + *(int *)optval = err_to_errno(netconn_err(sock->conn)); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_ERROR) = %d\n", + s, *(int *)optval)); + break; + +#if LWIP_SO_SNDTIMEO + case SO_SNDTIMEO: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, LWIP_SO_SNDRCVTIMEO_OPTTYPE); + LWIP_SO_SNDRCVTIMEO_SET(optval, netconn_get_sendtimeout(sock->conn)); + break; +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_RCVTIMEO + case SO_RCVTIMEO: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, LWIP_SO_SNDRCVTIMEO_OPTTYPE); + LWIP_SO_SNDRCVTIMEO_SET(optval, netconn_get_recvtimeout(sock->conn)); + break; +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF + case SO_RCVBUF: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, int); + *(int *)optval = netconn_get_recvbufsize(sock->conn); + break; +#endif /* LWIP_SO_RCVBUF */ +#if LWIP_SO_LINGER + case SO_LINGER: { + s16_t conn_linger; + struct linger *linger = (struct linger *)optval; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, struct linger); + conn_linger = sock->conn->linger; + if (conn_linger >= 0) { + linger->l_onoff = 1; + linger->l_linger = (int)conn_linger; + } else { + linger->l_onoff = 0; + linger->l_linger = 0; + } + } + break; +#endif /* LWIP_SO_LINGER */ +#if LWIP_UDP + case SO_NO_CHECK: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, *optlen, int, NETCONN_UDP); +#if LWIP_UDPLITE + if (udp_is_flag_set(sock->conn->pcb.udp, UDP_FLAGS_UDPLITE)) { + /* this flag is only available for UDP, not for UDP lite */ + done_socket(sock); + return EAFNOSUPPORT; + } +#endif /* LWIP_UDPLITE */ + *(int *)optval = udp_is_flag_set(sock->conn->pcb.udp, UDP_FLAGS_NOCHKSUM) ? 1 : 0; + break; +#endif /* LWIP_UDP*/ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + + /* Level: IPPROTO_IP */ + case IPPROTO_IP: + switch (optname) { + case IP_TTL: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + *(int *)optval = sock->conn->pcb.ip->ttl; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TTL) = %d\n", + s, *(int *)optval)); + break; + case IP_TOS: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + *(int *)optval = sock->conn->pcb.ip->tos; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TOS) = %d\n", + s, *(int *)optval)); + break; +#if LWIP_IPV4 && LWIP_MULTICAST_TX_OPTIONS && LWIP_UDP + case IP_MULTICAST_TTL: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, u8_t); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) { + done_socket(sock); + return ENOPROTOOPT; + } + *(u8_t *)optval = udp_get_multicast_ttl(sock->conn->pcb.udp); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_TTL) = %d\n", + s, *(int *)optval)); + break; + case IP_MULTICAST_IF: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, struct in_addr); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) { + done_socket(sock); + return ENOPROTOOPT; + } + inet_addr_from_ip4addr((struct in_addr *)optval, udp_get_multicast_netif_addr(sock->conn->pcb.udp)); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_IF) = 0x%"X32_F"\n", + s, *(u32_t *)optval)); + break; + case IP_MULTICAST_LOOP: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, u8_t); + if ((sock->conn->pcb.udp->flags & UDP_FLAGS_MULTICAST_LOOP) != 0) { + *(u8_t *)optval = 1; + } else { + *(u8_t *)optval = 0; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_LOOP) = %d\n", + s, *(int *)optval)); + break; +#endif /* LWIP_IPV4 && LWIP_MULTICAST_TX_OPTIONS && LWIP_UDP */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + +#if LWIP_TCP + /* Level: IPPROTO_TCP */ + case IPPROTO_TCP: + /* Special case: all IPPROTO_TCP option take an int */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, *optlen, int, NETCONN_TCP); + if (sock->conn->pcb.tcp->state == LISTEN) { + done_socket(sock); + return EINVAL; + } + switch (optname) { + case TCP_NODELAY: + *(int *)optval = tcp_nagle_disabled(sock->conn->pcb.tcp); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_NODELAY) = %s\n", + s, (*(int *)optval) ? "on" : "off") ); + break; + case TCP_KEEPALIVE: + *(int *)optval = (int)sock->conn->pcb.tcp->keep_idle; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) = %d\n", + s, *(int *)optval)); + break; + +#if LWIP_TCP_KEEPALIVE + case TCP_KEEPIDLE: + *(int *)optval = (int)(sock->conn->pcb.tcp->keep_idle / 1000); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_KEEPIDLE) = %d\n", + s, *(int *)optval)); + break; + case TCP_KEEPINTVL: + *(int *)optval = (int)(sock->conn->pcb.tcp->keep_intvl / 1000); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_KEEPINTVL) = %d\n", + s, *(int *)optval)); + break; + case TCP_KEEPCNT: + *(int *)optval = (int)sock->conn->pcb.tcp->keep_cnt; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_KEEPCNT) = %d\n", + s, *(int *)optval)); + break; +#endif /* LWIP_TCP_KEEPALIVE */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_TCP */ + +#if LWIP_IPV6 + /* Level: IPPROTO_IPV6 */ + case IPPROTO_IPV6: + switch (optname) { + case IPV6_V6ONLY: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, int); + *(int *)optval = (netconn_get_ipv6only(sock->conn) ? 1 : 0); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY) = %d\n", + s, *(int *)optval)); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_IPV6 */ + +#if LWIP_UDP && LWIP_UDPLITE + /* Level: IPPROTO_UDPLITE */ + case IPPROTO_UDPLITE: + /* Special case: all IPPROTO_UDPLITE option take an int */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + /* If this is no UDP lite socket, ignore any options. */ + if (!NETCONNTYPE_ISUDPLITE(netconn_type(sock->conn))) { + done_socket(sock); + return ENOPROTOOPT; + } + switch (optname) { + case UDPLITE_SEND_CSCOV: + *(int *)optval = sock->conn->pcb.udp->chksum_len_tx; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) = %d\n", + s, (*(int *)optval)) ); + break; + case UDPLITE_RECV_CSCOV: + *(int *)optval = sock->conn->pcb.udp->chksum_len_rx; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) = %d\n", + s, (*(int *)optval)) ); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_UDP */ + /* Level: IPPROTO_RAW */ + case IPPROTO_RAW: + switch (optname) { +#if LWIP_IPV6 && LWIP_RAW + case IPV6_CHECKSUM: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, *optlen, int, NETCONN_RAW); + if (sock->conn->pcb.raw->chksum_reqd == 0) { + *(int *)optval = -1; + } else { + *(int *)optval = sock->conn->pcb.raw->chksum_offset; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_RAW, IPV6_CHECKSUM) = %d\n", + s, (*(int *)optval)) ); + break; +#endif /* LWIP_IPV6 && LWIP_RAW */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_RAW, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", + s, level, optname)); + err = ENOPROTOOPT; + break; + } /* switch (level) */ + + done_socket(sock); + return err; +} + +int +lwip_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen) +{ + int err = 0; + struct lwip_sock *sock = get_socket(s); +#if !LWIP_TCPIP_CORE_LOCKING + err_t cberr; + LWIP_SETGETSOCKOPT_DATA_VAR_DECLARE(data); +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + + if (!sock) { + return -1; + } + + if (NULL == optval) { + set_errno(EFAULT); + done_socket(sock); + return -1; + } + +#if LWIP_TCPIP_CORE_LOCKING + /* core-locking can just call the -impl function */ + LOCK_TCPIP_CORE(); + err = lwip_setsockopt_impl(s, level, optname, optval, optlen); + UNLOCK_TCPIP_CORE(); + +#else /* LWIP_TCPIP_CORE_LOCKING */ + +#if LWIP_MPU_COMPATIBLE + /* MPU_COMPATIBLE copies the optval data, so check for max size here */ + if (optlen > LWIP_SETGETSOCKOPT_MAXOPTLEN) { + set_errno(ENOBUFS); + done_socket(sock); + return -1; + } +#endif /* LWIP_MPU_COMPATIBLE */ + + LWIP_SETGETSOCKOPT_DATA_VAR_ALLOC(data, sock); + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).s = s; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).level = level; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optname = optname; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen = optlen; +#if LWIP_MPU_COMPATIBLE + MEMCPY(LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optval, optval, optlen); +#else /* LWIP_MPU_COMPATIBLE */ + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optval.pc = (const void *)optval; +#endif /* LWIP_MPU_COMPATIBLE */ + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err = 0; +#if LWIP_NETCONN_SEM_PER_THREAD + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem = &sock->conn->op_completed; +#endif + cberr = tcpip_callback(lwip_setsockopt_callback, &LWIP_SETGETSOCKOPT_DATA_VAR_REF(data)); + if (cberr != ERR_OK) { + LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data); + set_errno(err_to_errno(cberr)); + done_socket(sock); + return -1; + } + sys_arch_sem_wait((sys_sem_t *)(LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem), 0); + + /* maybe lwip_setsockopt_impl has changed err */ + err = LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err; + LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + + set_errno(err); + done_socket(sock); + return err ? -1 : 0; +} + +#if !LWIP_TCPIP_CORE_LOCKING +/** lwip_setsockopt_callback: only used without CORE_LOCKING + * to get into the tcpip_thread + */ +static void +lwip_setsockopt_callback(void *arg) +{ + struct lwip_setgetsockopt_data *data; + LWIP_ASSERT("arg != NULL", arg != NULL); + data = (struct lwip_setgetsockopt_data *)arg; + + data->err = lwip_setsockopt_impl(data->s, data->level, data->optname, +#if LWIP_MPU_COMPATIBLE + data->optval, +#else /* LWIP_MPU_COMPATIBLE */ + data->optval.pc, +#endif /* LWIP_MPU_COMPATIBLE */ + data->optlen); + + sys_sem_signal((sys_sem_t *)(data->completed_sem)); +} +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +/** lwip_setsockopt_impl: the actual implementation of setsockopt: + * same argument as lwip_setsockopt, either called directly or through callback + */ +static int +lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_t optlen) +{ + int err = 0; + struct lwip_sock *sock = tryget_socket(s); + if (!sock) { + return EBADF; + } + +#ifdef LWIP_HOOK_SOCKETS_SETSOCKOPT + if (LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, &err)) { + return err; + } +#endif + + switch (level) { + + /* Level: SOL_SOCKET */ + case SOL_SOCKET: + switch (optname) { + + /* SO_ACCEPTCONN is get-only */ + + /* The option flags */ + case SO_BROADCAST: + case SO_KEEPALIVE: +#if SO_REUSE + case SO_REUSEADDR: +#endif /* SO_REUSE */ + if ((optname == SO_BROADCAST) && + (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP)) { + done_socket(sock); + return ENOPROTOOPT; + } + + optname = lwip_sockopt_to_ipopt(optname); + + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + if (*(const int *)optval) { + ip_set_option(sock->conn->pcb.ip, optname); + } else { + ip_reset_option(sock->conn->pcb.ip, optname); + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, optname=0x%x, ..) -> %s\n", + s, optname, (*(const int *)optval ? "on" : "off"))); + break; + + /* SO_TYPE is get-only */ + /* SO_ERROR is get-only */ + +#if LWIP_SO_SNDTIMEO + case SO_SNDTIMEO: { + long ms_long; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, LWIP_SO_SNDRCVTIMEO_OPTTYPE); + ms_long = LWIP_SO_SNDRCVTIMEO_GET_MS(optval); + if (ms_long < 0) { + done_socket(sock); + return EINVAL; + } + netconn_set_sendtimeout(sock->conn, ms_long); + break; + } +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_RCVTIMEO + case SO_RCVTIMEO: { + long ms_long; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, LWIP_SO_SNDRCVTIMEO_OPTTYPE); + ms_long = LWIP_SO_SNDRCVTIMEO_GET_MS(optval); + if (ms_long < 0) { + done_socket(sock); + return EINVAL; + } + netconn_set_recvtimeout(sock->conn, (u32_t)ms_long); + break; + } +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF + case SO_RCVBUF: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, int); + netconn_set_recvbufsize(sock->conn, *(const int *)optval); + break; +#endif /* LWIP_SO_RCVBUF */ +#if LWIP_SO_LINGER + case SO_LINGER: { + const struct linger *linger = (const struct linger *)optval; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, struct linger); + if (linger->l_onoff) { + int lingersec = linger->l_linger; + if (lingersec < 0) { + done_socket(sock); + return EINVAL; + } + if (lingersec > 0xFFFF) { + lingersec = 0xFFFF; + } + sock->conn->linger = (s16_t)lingersec; + } else { + sock->conn->linger = -1; + } + } + break; +#endif /* LWIP_SO_LINGER */ +#if LWIP_UDP + case SO_NO_CHECK: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_UDP); +#if LWIP_UDPLITE + if (udp_is_flag_set(sock->conn->pcb.udp, UDP_FLAGS_UDPLITE)) { + /* this flag is only available for UDP, not for UDP lite */ + done_socket(sock); + return EAFNOSUPPORT; + } +#endif /* LWIP_UDPLITE */ + if (*(const int *)optval) { + udp_set_flags(sock->conn->pcb.udp, UDP_FLAGS_NOCHKSUM); + } else { + udp_clear_flags(sock->conn->pcb.udp, UDP_FLAGS_NOCHKSUM); + } + break; +#endif /* LWIP_UDP */ + case SO_BINDTODEVICE: { + const struct ifreq *iface; + struct netif *n = NULL; + + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, struct ifreq); + + iface = (const struct ifreq *)optval; + if (iface->ifr_name[0] != 0) { + n = netif_find(iface->ifr_name); + if (n == NULL) { + done_socket(sock); + return ENODEV; + } + } + + switch (NETCONNTYPE_GROUP(netconn_type(sock->conn))) { +#if LWIP_TCP + case NETCONN_TCP: + tcp_bind_netif(sock->conn->pcb.tcp, n); + break; +#endif +#if LWIP_UDP + case NETCONN_UDP: + udp_bind_netif(sock->conn->pcb.udp, n); + break; +#endif +#if LWIP_RAW + case NETCONN_RAW: + raw_bind_netif(sock->conn->pcb.raw, n); + break; +#endif + default: + LWIP_ASSERT("Unhandled netconn type in SO_BINDTODEVICE", 0); + break; + } + } + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + + /* Level: IPPROTO_IP */ + case IPPROTO_IP: + switch (optname) { + case IP_TTL: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + sock->conn->pcb.ip->ttl = (u8_t)(*(const int *)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TTL, ..) -> %d\n", + s, sock->conn->pcb.ip->ttl)); + break; + case IP_TOS: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + sock->conn->pcb.ip->tos = (u8_t)(*(const int *)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TOS, ..)-> %d\n", + s, sock->conn->pcb.ip->tos)); + break; +#if LWIP_NETBUF_RECVINFO + case IP_PKTINFO: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_UDP); + if (*(const int *)optval) { + sock->conn->flags |= NETCONN_FLAG_PKTINFO; + } else { + sock->conn->flags &= ~NETCONN_FLAG_PKTINFO; + } + break; +#endif /* LWIP_NETBUF_RECVINFO */ +#if LWIP_IPV4 && LWIP_MULTICAST_TX_OPTIONS && LWIP_UDP + case IP_MULTICAST_TTL: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, u8_t, NETCONN_UDP); + udp_set_multicast_ttl(sock->conn->pcb.udp, (u8_t)(*(const u8_t *)optval)); + break; + case IP_MULTICAST_IF: { + ip4_addr_t if_addr; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, struct in_addr, NETCONN_UDP); + inet_addr_to_ip4addr(&if_addr, (const struct in_addr *)optval); + udp_set_multicast_netif_addr(sock->conn->pcb.udp, &if_addr); + } + break; + case IP_MULTICAST_LOOP: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, u8_t, NETCONN_UDP); + if (*(const u8_t *)optval) { + udp_set_flags(sock->conn->pcb.udp, UDP_FLAGS_MULTICAST_LOOP); + } else { + udp_clear_flags(sock->conn->pcb.udp, UDP_FLAGS_MULTICAST_LOOP); + } + break; +#endif /* LWIP_IPV4 && LWIP_MULTICAST_TX_OPTIONS && LWIP_UDP */ +#if LWIP_IGMP + case IP_ADD_MEMBERSHIP: + case IP_DROP_MEMBERSHIP: { + /* If this is a TCP or a RAW socket, ignore these options. */ + err_t igmp_err; + const struct ip_mreq *imr = (const struct ip_mreq *)optval; + ip4_addr_t if_addr; + ip4_addr_t multi_addr; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, struct ip_mreq, NETCONN_UDP); + inet_addr_to_ip4addr(&if_addr, &imr->imr_interface); + inet_addr_to_ip4addr(&multi_addr, &imr->imr_multiaddr); + if (optname == IP_ADD_MEMBERSHIP) { + if (!lwip_socket_register_membership(s, &if_addr, &multi_addr)) { + /* cannot track membership (out of memory) */ + err = ENOMEM; + igmp_err = ERR_OK; + } else { + igmp_err = igmp_joingroup(&if_addr, &multi_addr); + } + } else { + igmp_err = igmp_leavegroup(&if_addr, &multi_addr); + lwip_socket_unregister_membership(s, &if_addr, &multi_addr); + } + if (igmp_err != ERR_OK) { + err = EADDRNOTAVAIL; + } + } + break; +#endif /* LWIP_IGMP */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + +#if LWIP_TCP + /* Level: IPPROTO_TCP */ + case IPPROTO_TCP: + /* Special case: all IPPROTO_TCP option take an int */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_TCP); + if (sock->conn->pcb.tcp->state == LISTEN) { + done_socket(sock); + return EINVAL; + } + switch (optname) { + case TCP_NODELAY: + if (*(const int *)optval) { + tcp_nagle_disable(sock->conn->pcb.tcp); + } else { + tcp_nagle_enable(sock->conn->pcb.tcp); + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_NODELAY) -> %s\n", + s, (*(const int *)optval) ? "on" : "off") ); + break; + case TCP_KEEPALIVE: + sock->conn->pcb.tcp->keep_idle = (u32_t)(*(const int *)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %"U32_F"\n", + s, sock->conn->pcb.tcp->keep_idle)); + break; + +#if LWIP_TCP_KEEPALIVE + case TCP_KEEPIDLE: + sock->conn->pcb.tcp->keep_idle = 1000 * (u32_t)(*(const int *)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPIDLE) -> %"U32_F"\n", + s, sock->conn->pcb.tcp->keep_idle)); + break; + case TCP_KEEPINTVL: + sock->conn->pcb.tcp->keep_intvl = 1000 * (u32_t)(*(const int *)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPINTVL) -> %"U32_F"\n", + s, sock->conn->pcb.tcp->keep_intvl)); + break; + case TCP_KEEPCNT: + sock->conn->pcb.tcp->keep_cnt = (u32_t)(*(const int *)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPCNT) -> %"U32_F"\n", + s, sock->conn->pcb.tcp->keep_cnt)); + break; +#endif /* LWIP_TCP_KEEPALIVE */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_TCP*/ + +#if LWIP_IPV6 + /* Level: IPPROTO_IPV6 */ + case IPPROTO_IPV6: + switch (optname) { + case IPV6_V6ONLY: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + if (*(const int *)optval) { + netconn_set_ipv6only(sock->conn, 1); + } else { + netconn_set_ipv6only(sock->conn, 0); + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY, ..) -> %d\n", + s, (netconn_get_ipv6only(sock->conn) ? 1 : 0))); + break; +#if LWIP_IPV6_MLD + case IPV6_JOIN_GROUP: + case IPV6_LEAVE_GROUP: { + /* If this is a TCP or a RAW socket, ignore these options. */ + err_t mld6_err; + struct netif *netif; + ip6_addr_t multi_addr; + const struct ipv6_mreq *imr = (const struct ipv6_mreq *)optval; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, struct ipv6_mreq, NETCONN_UDP); + inet6_addr_to_ip6addr(&multi_addr, &imr->ipv6mr_multiaddr); + LWIP_ASSERT("Invalid netif index", imr->ipv6mr_interface <= 0xFFu); + netif = netif_get_by_index((u8_t)imr->ipv6mr_interface); + if (netif == NULL) { + err = EADDRNOTAVAIL; + break; + } + + if (optname == IPV6_JOIN_GROUP) { + if (!lwip_socket_register_mld6_membership(s, imr->ipv6mr_interface, &multi_addr)) { + /* cannot track membership (out of memory) */ + err = ENOMEM; + mld6_err = ERR_OK; + } else { + mld6_err = mld6_joingroup_netif(netif, &multi_addr); + } + } else { + mld6_err = mld6_leavegroup_netif(netif, &multi_addr); + lwip_socket_unregister_mld6_membership(s, imr->ipv6mr_interface, &multi_addr); + } + if (mld6_err != ERR_OK) { + err = EADDRNOTAVAIL; + } + } + break; +#endif /* LWIP_IPV6_MLD */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_IPV6 */ + +#if LWIP_UDP && LWIP_UDPLITE + /* Level: IPPROTO_UDPLITE */ + case IPPROTO_UDPLITE: + /* Special case: all IPPROTO_UDPLITE option take an int */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + /* If this is no UDP lite socket, ignore any options. */ + if (!NETCONNTYPE_ISUDPLITE(netconn_type(sock->conn))) { + done_socket(sock); + return ENOPROTOOPT; + } + switch (optname) { + case UDPLITE_SEND_CSCOV: + if ((*(const int *)optval != 0) && ((*(const int *)optval < 8) || (*(const int *)optval > 0xffff))) { + /* don't allow illegal values! */ + sock->conn->pcb.udp->chksum_len_tx = 8; + } else { + sock->conn->pcb.udp->chksum_len_tx = (u16_t) * (const int *)optval; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) -> %d\n", + s, (*(const int *)optval)) ); + break; + case UDPLITE_RECV_CSCOV: + if ((*(const int *)optval != 0) && ((*(const int *)optval < 8) || (*(const int *)optval > 0xffff))) { + /* don't allow illegal values! */ + sock->conn->pcb.udp->chksum_len_rx = 8; + } else { + sock->conn->pcb.udp->chksum_len_rx = (u16_t) * (const int *)optval; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) -> %d\n", + s, (*(const int *)optval)) ); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_UDP */ + /* Level: IPPROTO_RAW */ + case IPPROTO_RAW: + switch (optname) { +#if LWIP_IPV6 && LWIP_RAW + case IPV6_CHECKSUM: + /* It should not be possible to disable the checksum generation with ICMPv6 + * as per RFC 3542 chapter 3.1 */ + if (sock->conn->pcb.raw->protocol == IPPROTO_ICMPV6) { + done_socket(sock); + return EINVAL; + } + + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_RAW); + if (*(const int *)optval < 0) { + sock->conn->pcb.raw->chksum_reqd = 0; + } else if (*(const int *)optval & 1) { + /* Per RFC3542, odd offsets are not allowed */ + done_socket(sock); + return EINVAL; + } else { + sock->conn->pcb.raw->chksum_reqd = 1; + sock->conn->pcb.raw->chksum_offset = (u16_t) * (const int *)optval; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_RAW, IPV6_CHECKSUM, ..) -> %d\n", + s, sock->conn->pcb.raw->chksum_reqd)); + break; +#endif /* LWIP_IPV6 && LWIP_RAW */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_RAW, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", + s, level, optname)); + err = ENOPROTOOPT; + break; + } /* switch (level) */ + + done_socket(sock); + return err; +} + +int +lwip_ioctl(int s, long cmd, void *argp) +{ + struct lwip_sock *sock = get_socket(s); + u8_t val; +#if LWIP_SO_RCVBUF + int recv_avail; +#endif /* LWIP_SO_RCVBUF */ + + if (!sock) { + return -1; + } + + switch (cmd) { +#if LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE + case FIONREAD: + if (!argp) { + set_errno(EINVAL); + done_socket(sock); + return -1; + } +#if LWIP_FIONREAD_LINUXMODE + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + struct netbuf *nb; + if (sock->lastdata.netbuf) { + nb = sock->lastdata.netbuf; + *((int *)argp) = nb->p->tot_len; + } else { + struct netbuf *rxbuf; + err_t err = netconn_recv_udp_raw_netbuf_flags(sock->conn, &rxbuf, NETCONN_DONTBLOCK); + if (err != ERR_OK) { + *((int *)argp) = 0; + } else { + sock->lastdata.netbuf = rxbuf; + *((int *)argp) = rxbuf->p->tot_len; + } + } + done_socket(sock); + return 0; + } +#endif /* LWIP_FIONREAD_LINUXMODE */ + +#if LWIP_SO_RCVBUF + /* we come here if either LWIP_FIONREAD_LINUXMODE==0 or this is a TCP socket */ + SYS_ARCH_GET(sock->conn->recv_avail, recv_avail); + if (recv_avail < 0) { + recv_avail = 0; + } + + /* Check if there is data left from the last recv operation. /maq 041215 */ + if (sock->lastdata.netbuf) { + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { + recv_avail += sock->lastdata.pbuf->tot_len; + } else { + recv_avail += sock->lastdata.netbuf->p->tot_len; + } + } + *((int *)argp) = recv_avail; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONREAD, %p) = %"U16_F"\n", s, argp, *((u16_t *)argp))); + set_errno(0); + done_socket(sock); + return 0; +#else /* LWIP_SO_RCVBUF */ + break; +#endif /* LWIP_SO_RCVBUF */ +#endif /* LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE */ + + case (long)FIONBIO: + val = 0; + if (argp && *(int *)argp) { + val = 1; + } + netconn_set_nonblocking(sock->conn, val); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONBIO, %d)\n", s, val)); + set_errno(0); + done_socket(sock); + return 0; + + default: + break; + } /* switch (cmd) */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, UNIMPL: 0x%lx, %p)\n", s, cmd, argp)); + set_errno(ENOSYS); /* not yet implemented */ + done_socket(sock); + return -1; +} + +/** A minimal implementation of fcntl. + * Currently only the commands F_GETFL and F_SETFL are implemented. + * The flag O_NONBLOCK and access modes are supported for F_GETFL, only + * the flag O_NONBLOCK is implemented for F_SETFL. + */ +int +lwip_fcntl(int s, int cmd, int val) +{ + struct lwip_sock *sock = get_socket(s); + int ret = -1; + int op_mode = 0; + + if (!sock) { + return -1; + } + + switch (cmd) { + case F_GETFL: + ret = netconn_is_nonblocking(sock->conn) ? O_NONBLOCK : 0; + set_errno(0); + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { +#if LWIP_TCPIP_CORE_LOCKING + LOCK_TCPIP_CORE(); +#else + SYS_ARCH_DECL_PROTECT(lev); + /* the proper thing to do here would be to get into the tcpip_thread, + but locking should be OK as well since we only *read* some flags */ + SYS_ARCH_PROTECT(lev); +#endif +#if LWIP_TCP + if (sock->conn->pcb.tcp) { + if (!(sock->conn->pcb.tcp->flags & TF_RXCLOSED)) { + op_mode |= O_RDONLY; + } + if (!(sock->conn->pcb.tcp->flags & TF_FIN)) { + op_mode |= O_WRONLY; + } + } +#endif +#if LWIP_TCPIP_CORE_LOCKING + UNLOCK_TCPIP_CORE(); +#else + SYS_ARCH_UNPROTECT(lev); +#endif + } else { + op_mode |= O_RDWR; + } + + /* ensure O_RDWR for (O_RDONLY|O_WRONLY) != O_RDWR cases */ + ret |= (op_mode == (O_RDONLY | O_WRONLY)) ? O_RDWR : op_mode; + + break; + case F_SETFL: + /* Bits corresponding to the file access mode and the file creation flags [..] that are set in arg shall be ignored */ + val &= ~(O_RDONLY | O_WRONLY | O_RDWR); + if ((val & ~O_NONBLOCK) == 0) { + /* only O_NONBLOCK, all other bits are zero */ + netconn_set_nonblocking(sock->conn, val & O_NONBLOCK); + ret = 0; + set_errno(0); + } else { + set_errno(ENOSYS); /* not yet implemented */ + } + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_fcntl(%d, UNIMPL: %d, %d)\n", s, cmd, val)); + set_errno(ENOSYS); /* not yet implemented */ + break; + } + done_socket(sock); + return ret; +} + +#if LWIP_COMPAT_SOCKETS == 2 && LWIP_POSIX_SOCKETS_IO_NAMES +int +fcntl(int s, int cmd, ...) +{ + va_list ap; + int val; + + va_start(ap, cmd); + val = va_arg(ap, int); + va_end(ap); + return lwip_fcntl(s, cmd, val); +} +#endif + +const char * +lwip_inet_ntop(int af, const void *src, char *dst, socklen_t size) +{ + const char *ret = NULL; + int size_int = (int)size; + if (size_int < 0) { + set_errno(ENOSPC); + return NULL; + } + switch (af) { +#if LWIP_IPV4 + case AF_INET: + ret = ip4addr_ntoa_r((const ip4_addr_t *)src, dst, size_int); + if (ret == NULL) { + set_errno(ENOSPC); + } + break; +#endif +#if LWIP_IPV6 + case AF_INET6: + ret = ip6addr_ntoa_r((const ip6_addr_t *)src, dst, size_int); + if (ret == NULL) { + set_errno(ENOSPC); + } + break; +#endif + default: + set_errno(EAFNOSUPPORT); + break; + } + return ret; +} + +int +lwip_inet_pton(int af, const char *src, void *dst) +{ + int err; + switch (af) { +#if LWIP_IPV4 + case AF_INET: + err = ip4addr_aton(src, (ip4_addr_t *)dst); + break; +#endif +#if LWIP_IPV6 + case AF_INET6: { + /* convert into temporary variable since ip6_addr_t might be larger + than in6_addr when scopes are enabled */ + ip6_addr_t addr; + err = ip6addr_aton(src, &addr); + if (err) { + memcpy(dst, &addr.addr, sizeof(addr.addr)); + } + break; + } +#endif + default: + err = -1; + set_errno(EAFNOSUPPORT); + break; + } + return err; +} + +#if LWIP_IGMP +/** Register a new IGMP membership. On socket close, the membership is dropped automatically. + * + * ATTENTION: this function is called from tcpip_thread (or under CORE_LOCK). + * + * @return 1 on success, 0 on failure + */ +static int +lwip_socket_register_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return 0; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if (socket_ipv4_multicast_memberships[i].sock == NULL) { + socket_ipv4_multicast_memberships[i].sock = sock; + ip4_addr_copy(socket_ipv4_multicast_memberships[i].if_addr, *if_addr); + ip4_addr_copy(socket_ipv4_multicast_memberships[i].multi_addr, *multi_addr); + done_socket(sock); + return 1; + } + } + done_socket(sock); + return 0; +} + +/** Unregister a previously registered membership. This prevents dropping the membership + * on socket close. + * + * ATTENTION: this function is called from tcpip_thread (or under CORE_LOCK). + */ +static void +lwip_socket_unregister_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if ((socket_ipv4_multicast_memberships[i].sock == sock) && + ip4_addr_eq(&socket_ipv4_multicast_memberships[i].if_addr, if_addr) && + ip4_addr_eq(&socket_ipv4_multicast_memberships[i].multi_addr, multi_addr)) { + socket_ipv4_multicast_memberships[i].sock = NULL; + ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].if_addr); + ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].multi_addr); + break; + } + } + done_socket(sock); +} + +/** Drop all memberships of a socket that were not dropped explicitly via setsockopt. + * + * ATTENTION: this function is NOT called from tcpip_thread (or under CORE_LOCK). + */ +static void +lwip_socket_drop_registered_memberships(int s) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if (socket_ipv4_multicast_memberships[i].sock == sock) { + ip_addr_t multi_addr, if_addr; + ip_addr_copy_from_ip4(multi_addr, socket_ipv4_multicast_memberships[i].multi_addr); + ip_addr_copy_from_ip4(if_addr, socket_ipv4_multicast_memberships[i].if_addr); + socket_ipv4_multicast_memberships[i].sock = NULL; + ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].if_addr); + ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].multi_addr); + + netconn_join_leave_group(sock->conn, &multi_addr, &if_addr, NETCONN_LEAVE); + } + } + done_socket(sock); +} +#endif /* LWIP_IGMP */ + +#if LWIP_IPV6_MLD +/** Register a new MLD6 membership. On socket close, the membership is dropped automatically. + * + * ATTENTION: this function is called from tcpip_thread (or under CORE_LOCK). + * + * @return 1 on success, 0 on failure + */ +static int +lwip_socket_register_mld6_membership(int s, unsigned int if_idx, const ip6_addr_t *multi_addr) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return 0; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if (socket_ipv6_multicast_memberships[i].sock == NULL) { + socket_ipv6_multicast_memberships[i].sock = sock; + socket_ipv6_multicast_memberships[i].if_idx = (u8_t)if_idx; + ip6_addr_copy(socket_ipv6_multicast_memberships[i].multi_addr, *multi_addr); + done_socket(sock); + return 1; + } + } + done_socket(sock); + return 0; +} + +/** Unregister a previously registered MLD6 membership. This prevents dropping the membership + * on socket close. + * + * ATTENTION: this function is called from tcpip_thread (or under CORE_LOCK). + */ +static void +lwip_socket_unregister_mld6_membership(int s, unsigned int if_idx, const ip6_addr_t *multi_addr) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if ((socket_ipv6_multicast_memberships[i].sock == sock) && + (socket_ipv6_multicast_memberships[i].if_idx == if_idx) && + ip6_addr_eq(&socket_ipv6_multicast_memberships[i].multi_addr, multi_addr)) { + socket_ipv6_multicast_memberships[i].sock = NULL; + socket_ipv6_multicast_memberships[i].if_idx = NETIF_NO_INDEX; + ip6_addr_set_zero(&socket_ipv6_multicast_memberships[i].multi_addr); + break; + } + } + done_socket(sock); +} + +/** Drop all MLD6 memberships of a socket that were not dropped explicitly via setsockopt. + * + * ATTENTION: this function is NOT called from tcpip_thread (or under CORE_LOCK). + */ +static void +lwip_socket_drop_registered_mld6_memberships(int s) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if (socket_ipv6_multicast_memberships[i].sock == sock) { + ip_addr_t multi_addr; + u8_t if_idx; + + ip_addr_copy_from_ip6(multi_addr, socket_ipv6_multicast_memberships[i].multi_addr); + if_idx = socket_ipv6_multicast_memberships[i].if_idx; + + socket_ipv6_multicast_memberships[i].sock = NULL; + socket_ipv6_multicast_memberships[i].if_idx = NETIF_NO_INDEX; + ip6_addr_set_zero(&socket_ipv6_multicast_memberships[i].multi_addr); + + netconn_join_leave_group_netif(sock->conn, &multi_addr, if_idx, NETCONN_LEAVE); + } + } + done_socket(sock); +} +#endif /* LWIP_IPV6_MLD */ + +#endif /* LWIP_SOCKET */ diff --git a/lib/lwip/api/tcpip.c b/lib/lwip/api/tcpip.c new file mode 100644 index 0000000000..3aecbd432c --- /dev/null +++ b/lib/lwip/api/tcpip.c @@ -0,0 +1,706 @@ +/** + * @file + * Sequential API Main thread module + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if !NO_SYS /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/priv/tcpip_priv.h" +#include "lwip/sys.h" +#include "lwip/memp.h" +#include "lwip/mem.h" +#include "lwip/init.h" +#include "lwip/ip.h" +#include "lwip/pbuf.h" +#include "lwip/etharp.h" +#include "netif/ethernet.h" + +#define TCPIP_MSG_VAR_REF(name) API_VAR_REF(name) +#define TCPIP_MSG_VAR_DECLARE(name) API_VAR_DECLARE(struct tcpip_msg, name) +#define TCPIP_MSG_VAR_ALLOC(name) API_VAR_ALLOC(struct tcpip_msg, MEMP_TCPIP_MSG_API, name, ERR_MEM) +#define TCPIP_MSG_VAR_FREE(name) API_VAR_FREE(MEMP_TCPIP_MSG_API, name) + +/* global variables */ +static tcpip_init_done_fn tcpip_init_done; +static void *tcpip_init_done_arg; +static sys_mbox_t tcpip_mbox; + +#if LWIP_TCPIP_CORE_LOCKING +/** The global semaphore to lock the stack. */ +sys_mutex_t lock_tcpip_core; +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +static void tcpip_thread_handle_msg(struct tcpip_msg *msg); + +#if !LWIP_TIMERS +/* wait for a message with timers disabled (e.g. pass a timer-check trigger into tcpip_thread) */ +#define TCPIP_MBOX_FETCH(mbox, msg) sys_mbox_fetch(mbox, msg) +#else /* !LWIP_TIMERS */ +/* wait for a message, timeouts are processed while waiting */ +#define TCPIP_MBOX_FETCH(mbox, msg) tcpip_timeouts_mbox_fetch(mbox, msg) +/** + * Wait (forever) for a message to arrive in an mbox. + * While waiting, timeouts are processed. + * + * @param mbox the mbox to fetch the message from + * @param msg the place to store the message + */ +static void +tcpip_timeouts_mbox_fetch(sys_mbox_t *mbox, void **msg) +{ + u32_t sleeptime, res; + +again: + LWIP_ASSERT_CORE_LOCKED(); + + sleeptime = sys_timeouts_sleeptime(); + if (sleeptime == SYS_TIMEOUTS_SLEEPTIME_INFINITE) { + UNLOCK_TCPIP_CORE(); + sys_arch_mbox_fetch(mbox, msg, 0); + LOCK_TCPIP_CORE(); + return; + } else if (sleeptime == 0) { + sys_check_timeouts(); + /* We try again to fetch a message from the mbox. */ + goto again; + } + + UNLOCK_TCPIP_CORE(); + res = sys_arch_mbox_fetch(mbox, msg, sleeptime); + LOCK_TCPIP_CORE(); + if (res == SYS_ARCH_TIMEOUT) { + /* If a SYS_ARCH_TIMEOUT value is returned, a timeout occurred + before a message could be fetched. */ + sys_check_timeouts(); + /* We try again to fetch a message from the mbox. */ + goto again; + } +} +#endif /* !LWIP_TIMERS */ + +/** + * The main lwIP thread. This thread has exclusive access to lwIP core functions + * (unless access to them is not locked). Other threads communicate with this + * thread using message boxes. + * + * It also starts all the timers to make sure they are running in the right + * thread context. + * + * @param arg unused argument + */ +static void +tcpip_thread(void *arg) +{ + struct tcpip_msg *msg; + LWIP_UNUSED_ARG(arg); + + LWIP_MARK_TCPIP_THREAD(); + + LOCK_TCPIP_CORE(); + if (tcpip_init_done != NULL) { + tcpip_init_done(tcpip_init_done_arg); + } + + while (1) { /* MAIN Loop */ + LWIP_TCPIP_THREAD_ALIVE(); + /* wait for a message, timeouts are processed while waiting */ + TCPIP_MBOX_FETCH(&tcpip_mbox, (void **)&msg); + if (msg == NULL) { + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: NULL\n")); + LWIP_ASSERT("tcpip_thread: invalid message", 0); + continue; + } + tcpip_thread_handle_msg(msg); + } +} + +/* Handle a single tcpip_msg + * This is in its own function for access by tests only. + */ +static void +tcpip_thread_handle_msg(struct tcpip_msg *msg) +{ + switch (msg->type) { +#if !LWIP_TCPIP_CORE_LOCKING + case TCPIP_MSG_API: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg)); + msg->msg.api_msg.function(msg->msg.api_msg.msg); + break; + case TCPIP_MSG_API_CALL: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API CALL message %p\n", (void *)msg)); + msg->msg.api_call.arg->err = msg->msg.api_call.function(msg->msg.api_call.arg); + sys_sem_signal(msg->msg.api_call.sem); + break; + case TCPIP_MSG_CALLBACK_STATIC_WAIT: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK WAIT message %p\n", (void *)msg)); + msg->msg.cb_wait.function(msg->msg.cb_wait.ctx); + sys_sem_signal(msg->msg.cb_wait.sem); + break; +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + +#if !LWIP_TCPIP_CORE_LOCKING_INPUT + case TCPIP_MSG_INPKT: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg)); + if (msg->msg.inp.input_fn(msg->msg.inp.p, msg->msg.inp.netif) != ERR_OK) { + pbuf_free(msg->msg.inp.p); + } + memp_free(MEMP_TCPIP_MSG_INPKT, msg); + break; +#endif /* !LWIP_TCPIP_CORE_LOCKING_INPUT */ + +#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS + case TCPIP_MSG_TIMEOUT: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg)); + sys_timeout(msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg); + memp_free(MEMP_TCPIP_MSG_API, msg); + break; + case TCPIP_MSG_UNTIMEOUT: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: UNTIMEOUT %p\n", (void *)msg)); + sys_untimeout(msg->msg.tmo.h, msg->msg.tmo.arg); + memp_free(MEMP_TCPIP_MSG_API, msg); + break; +#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */ + + case TCPIP_MSG_CALLBACK: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg)); + msg->msg.cb.function(msg->msg.cb.ctx); + memp_free(MEMP_TCPIP_MSG_API, msg); + break; + + case TCPIP_MSG_CALLBACK_STATIC: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK_STATIC %p\n", (void *)msg)); + msg->msg.cb.function(msg->msg.cb.ctx); + break; + + default: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: %d\n", msg->type)); + LWIP_ASSERT("tcpip_thread: invalid message", 0); + break; + } +} + +#ifdef TCPIP_THREAD_TEST +/** Work on queued items in single-threaded test mode */ +int +tcpip_thread_poll_one(void) +{ + int ret = 0; + struct tcpip_msg *msg; + + if (sys_arch_mbox_tryfetch(&tcpip_mbox, (void **)&msg) != SYS_MBOX_EMPTY) { + LOCK_TCPIP_CORE(); + if (msg != NULL) { + tcpip_thread_handle_msg(msg); + ret = 1; + } + UNLOCK_TCPIP_CORE(); + } + return ret; +} +#endif + +/** + * Pass a received packet to tcpip_thread for input processing + * + * @param p the received packet + * @param inp the network interface on which the packet was received + * @param input_fn input function to call + */ +err_t +tcpip_inpkt(struct pbuf *p, struct netif *inp, netif_input_fn input_fn) +{ +#if LWIP_TCPIP_CORE_LOCKING_INPUT + err_t ret; + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_inpkt: PACKET %p/%p\n", (void *)p, (void *)inp)); + LOCK_TCPIP_CORE(); + ret = input_fn(p, inp); + UNLOCK_TCPIP_CORE(); + return ret; +#else /* LWIP_TCPIP_CORE_LOCKING_INPUT */ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_INPKT); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_INPKT; + msg->msg.inp.p = p; + msg->msg.inp.netif = inp; + msg->msg.inp.input_fn = input_fn; + if (sys_mbox_trypost(&tcpip_mbox, msg) != ERR_OK) { + memp_free(MEMP_TCPIP_MSG_INPKT, msg); + return ERR_MEM; + } + return ERR_OK; +#endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */ +} + +/** + * @ingroup lwip_os + * Pass a received packet to tcpip_thread for input processing with + * ethernet_input or ip_input. Don't call directly, pass to netif_add() + * and call netif->input(). + * + * @param p the received packet, p->payload pointing to the Ethernet header or + * to an IP header (if inp doesn't have NETIF_FLAG_ETHARP or + * NETIF_FLAG_ETHERNET flags) + * @param inp the network interface on which the packet was received + */ +err_t +tcpip_input(struct pbuf *p, struct netif *inp) +{ +#if LWIP_ETHERNET + if (inp->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) { + return tcpip_inpkt(p, inp, ethernet_input); + } else +#endif /* LWIP_ETHERNET */ + return tcpip_inpkt(p, inp, ip_input); +} + +/** + * @ingroup lwip_os + * Call a specific function in the thread context of + * tcpip_thread for easy access synchronization. + * A function called in that way may access lwIP core code + * without fearing concurrent access. + * Blocks until the request is posted. + * Must not be called from interrupt context! + * + * @param function the function to call + * @param ctx parameter passed to f + * @return ERR_OK if the function was called, another err_t if not + * + * @see tcpip_try_callback + */ +err_t +tcpip_callback(tcpip_callback_fn function, void *ctx) +{ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_CALLBACK; + msg->msg.cb.function = function; + msg->msg.cb.ctx = ctx; + + sys_mbox_post(&tcpip_mbox, msg); + return ERR_OK; +} + +/** + * @ingroup lwip_os + * Call a specific function in the thread context of + * tcpip_thread for easy access synchronization. + * A function called in that way may access lwIP core code + * without fearing concurrent access. + * Does NOT block when the request cannot be posted because the + * tcpip_mbox is full, but returns ERR_MEM instead. + * Can be called from interrupt context. + * + * @param function the function to call + * @param ctx parameter passed to f + * @return ERR_OK if the function was called, another err_t if not + * + * @see tcpip_callback + */ +err_t +tcpip_try_callback(tcpip_callback_fn function, void *ctx) +{ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_CALLBACK; + msg->msg.cb.function = function; + msg->msg.cb.ctx = ctx; + + if (sys_mbox_trypost(&tcpip_mbox, msg) != ERR_OK) { + memp_free(MEMP_TCPIP_MSG_API, msg); + return ERR_MEM; + } + return ERR_OK; +} + +#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS +/** + * call sys_timeout in tcpip_thread + * + * @param msecs time in milliseconds for timeout + * @param h function to be called on timeout + * @param arg argument to pass to timeout function h + * @return ERR_MEM on memory error, ERR_OK otherwise + */ +err_t +tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg) +{ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_TIMEOUT; + msg->msg.tmo.msecs = msecs; + msg->msg.tmo.h = h; + msg->msg.tmo.arg = arg; + sys_mbox_post(&tcpip_mbox, msg); + return ERR_OK; +} + +/** + * call sys_untimeout in tcpip_thread + * + * @param h function to be called on timeout + * @param arg argument to pass to timeout function h + * @return ERR_MEM on memory error, ERR_OK otherwise + */ +err_t +tcpip_untimeout(sys_timeout_handler h, void *arg) +{ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_UNTIMEOUT; + msg->msg.tmo.h = h; + msg->msg.tmo.arg = arg; + sys_mbox_post(&tcpip_mbox, msg); + return ERR_OK; +} +#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */ + + +/** + * Sends a message to TCPIP thread to call a function. Caller thread blocks on + * on a provided semaphore, which ist NOT automatically signalled by TCPIP thread, + * this has to be done by the user. + * It is recommended to use LWIP_TCPIP_CORE_LOCKING since this is the way + * with least runtime overhead. + * + * @param fn function to be called from TCPIP thread + * @param apimsg argument to API function + * @param sem semaphore to wait on + * @return ERR_OK if the function was called, another err_t if not + */ +err_t +tcpip_send_msg_wait_sem(tcpip_callback_fn fn, void *apimsg, sys_sem_t *sem) +{ +#if LWIP_TCPIP_CORE_LOCKING + LWIP_UNUSED_ARG(sem); + LOCK_TCPIP_CORE(); + fn(apimsg); + UNLOCK_TCPIP_CORE(); + return ERR_OK; +#else /* LWIP_TCPIP_CORE_LOCKING */ + TCPIP_MSG_VAR_DECLARE(msg); + + LWIP_ASSERT("semaphore not initialized", sys_sem_valid(sem)); + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + + TCPIP_MSG_VAR_ALLOC(msg); + TCPIP_MSG_VAR_REF(msg).type = TCPIP_MSG_API; + TCPIP_MSG_VAR_REF(msg).msg.api_msg.function = fn; + TCPIP_MSG_VAR_REF(msg).msg.api_msg.msg = apimsg; + sys_mbox_post(&tcpip_mbox, &TCPIP_MSG_VAR_REF(msg)); + sys_arch_sem_wait(sem, 0); + TCPIP_MSG_VAR_FREE(msg); + return ERR_OK; +#endif /* LWIP_TCPIP_CORE_LOCKING */ +} + +/** + * Synchronously calls function in TCPIP thread and waits for its completion. + * It is recommended to use LWIP_TCPIP_CORE_LOCKING (preferred) or + * LWIP_NETCONN_SEM_PER_THREAD. + * If not, a semaphore is created and destroyed on every call which is usually + * an expensive/slow operation. + * @param fn Function to call + * @param call Call parameters + * @return Return value from tcpip_api_call_fn + */ +err_t +tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call_data *call) +{ +#if LWIP_TCPIP_CORE_LOCKING + err_t err; + LOCK_TCPIP_CORE(); + err = fn(call); + UNLOCK_TCPIP_CORE(); + return err; +#else /* LWIP_TCPIP_CORE_LOCKING */ + TCPIP_MSG_VAR_DECLARE(msg); + +#if !LWIP_NETCONN_SEM_PER_THREAD + err_t err = sys_sem_new(&call->sem, 0); + if (err != ERR_OK) { + return err; + } +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + + TCPIP_MSG_VAR_ALLOC(msg); + TCPIP_MSG_VAR_REF(msg).type = TCPIP_MSG_API_CALL; + TCPIP_MSG_VAR_REF(msg).msg.api_call.arg = call; + TCPIP_MSG_VAR_REF(msg).msg.api_call.function = fn; +#if LWIP_NETCONN_SEM_PER_THREAD + TCPIP_MSG_VAR_REF(msg).msg.api_call.sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else /* LWIP_NETCONN_SEM_PER_THREAD */ + TCPIP_MSG_VAR_REF(msg).msg.api_call.sem = &call->sem; +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + sys_mbox_post(&tcpip_mbox, &TCPIP_MSG_VAR_REF(msg)); + sys_arch_sem_wait(TCPIP_MSG_VAR_REF(msg).msg.api_call.sem, 0); + TCPIP_MSG_VAR_FREE(msg); + +#if !LWIP_NETCONN_SEM_PER_THREAD + sys_sem_free(&call->sem); +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + return call->err; +#endif /* LWIP_TCPIP_CORE_LOCKING */ +} + +/** + * @ingroup lwip_os + * Allocate a structure for a static callback message and initialize it. + * The message has a special type such that lwIP never frees it. + * This is intended to be used to send "static" messages from interrupt context, + * e.g. the message is allocated once and posted several times from an IRQ + * using tcpip_callbackmsg_trycallback(). + * Example usage: Trigger execution of an ethernet IRQ DPC routine in lwIP thread context. + * + * @param function the function to call + * @param ctx parameter passed to function + * @return a struct pointer to pass to tcpip_callbackmsg_trycallback(). + * + * @see tcpip_callbackmsg_trycallback() + * @see tcpip_callbackmsg_delete() + */ +struct tcpip_callback_msg * +tcpip_callbackmsg_new(tcpip_callback_fn function, void *ctx) +{ + struct tcpip_msg *msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return NULL; + } + msg->type = TCPIP_MSG_CALLBACK_STATIC; + msg->msg.cb.function = function; + msg->msg.cb.ctx = ctx; + return (struct tcpip_callback_msg *)msg; +} + +/** + * @ingroup lwip_os + * Free a callback message allocated by tcpip_callbackmsg_new(). + * + * @param msg the message to free + * + * @see tcpip_callbackmsg_new() + */ +void +tcpip_callbackmsg_delete(struct tcpip_callback_msg *msg) +{ + memp_free(MEMP_TCPIP_MSG_API, msg); +} + +/** + * @ingroup lwip_os + * Try to post a callback-message to the tcpip_thread tcpip_mbox. + * + * @param msg pointer to the message to post + * @return sys_mbox_trypost() return code + * + * @see tcpip_callbackmsg_new() + */ +err_t +tcpip_callbackmsg_trycallback(struct tcpip_callback_msg *msg) +{ + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + return sys_mbox_trypost(&tcpip_mbox, msg); +} + +/** + * @ingroup lwip_os + * Try to post a callback-message to the tcpip_thread mbox. + * Same as @ref tcpip_callbackmsg_trycallback but calls sys_mbox_trypost_fromisr(), + * mainly to help FreeRTOS, where calls differ between task level and ISR level. + * + * @param msg pointer to the message to post + * @return sys_mbox_trypost_fromisr() return code (without change, so this + * knowledge can be used to e.g. propagate "bool needs_scheduling") + * + * @see tcpip_callbackmsg_new() + */ +err_t +tcpip_callbackmsg_trycallback_fromisr(struct tcpip_callback_msg *msg) +{ + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + return sys_mbox_trypost_fromisr(&tcpip_mbox, msg); +} + +/** + * Sends a message to TCPIP thread to call a function. Caller thread blocks + * until the function returns. + * It is recommended to use LWIP_TCPIP_CORE_LOCKING (preferred) or + * LWIP_NETCONN_SEM_PER_THREAD. + * If not, a semaphore is created and destroyed on every call which is usually + * an expensive/slow operation. + * + * @param function the function to call + * @param ctx parameter passed to f + * @return ERR_OK if the function was called, another err_t if not + */ +err_t +tcpip_callback_wait(tcpip_callback_fn function, void *ctx) +{ +#if LWIP_TCPIP_CORE_LOCKING + LOCK_TCPIP_CORE(); + function(ctx); + UNLOCK_TCPIP_CORE(); + return ERR_OK; +#else /* LWIP_TCPIP_CORE_LOCKING */ + err_t err; + sys_sem_t sem; + struct tcpip_msg msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox)); + + err = sys_sem_new(&sem, 0); + if (err != ERR_OK) { + return err; + } + + msg.type = TCPIP_MSG_CALLBACK_STATIC_WAIT; + msg.msg.cb_wait.function = function; + msg.msg.cb_wait.ctx = ctx; + msg.msg.cb_wait.sem = &sem; + sys_mbox_post(&tcpip_mbox, &msg); + sys_arch_sem_wait(&sem, 0); + sys_sem_free(&sem); + return ERR_OK; +#endif /* LWIP_TCPIP_CORE_LOCKING */ +} + +/** + * @ingroup lwip_os + * Initialize this module: + * - initialize all sub modules + * - start the tcpip_thread + * + * @param initfunc a function to call when tcpip_thread is running and finished initializing + * @param arg argument to pass to initfunc + */ +void +tcpip_init(tcpip_init_done_fn initfunc, void *arg) +{ + lwip_init(); + + tcpip_init_done = initfunc; + tcpip_init_done_arg = arg; + if (sys_mbox_new(&tcpip_mbox, TCPIP_MBOX_SIZE) != ERR_OK) { + LWIP_ASSERT("failed to create tcpip_thread mbox", 0); + } +#if LWIP_TCPIP_CORE_LOCKING + if (sys_mutex_new(&lock_tcpip_core) != ERR_OK) { + LWIP_ASSERT("failed to create lock_tcpip_core", 0); + } +#endif /* LWIP_TCPIP_CORE_LOCKING */ + + sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO); +} + +/** + * Simple callback function used with tcpip_callback to free a pbuf + * (pbuf_free has a wrong signature for tcpip_callback) + * + * @param p The pbuf (chain) to be dereferenced. + */ +static void +pbuf_free_int(void *p) +{ + struct pbuf *q = (struct pbuf *)p; + pbuf_free(q); +} + +/** + * A simple wrapper function that allows you to free a pbuf from interrupt context. + * + * @param p The pbuf (chain) to be dereferenced. + * @return ERR_OK if callback could be enqueued, an err_t if not + */ +err_t +pbuf_free_callback(struct pbuf *p) +{ + return tcpip_try_callback(pbuf_free_int, p); +} + +/** + * A simple wrapper function that allows you to free heap memory from + * interrupt context. + * + * @param m the heap memory to free + * @return ERR_OK if callback could be enqueued, an err_t if not + */ +err_t +mem_free_callback(void *m) +{ + return tcpip_try_callback(mem_free, m); +} + +#endif /* !NO_SYS */ diff --git a/lib/lwip/apps/http/http_client.c b/lib/lwip/apps/http/http_client.c new file mode 100644 index 0000000000..1973e79e72 --- /dev/null +++ b/lib/lwip/apps/http/http_client.c @@ -0,0 +1,911 @@ +/** + * @file + * HTTP client + */ + +/* + * Copyright (c) 2018 Simon Goldschmidt goldsimon@gmx.de + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + */ + +/** + * @defgroup httpc HTTP client + * @ingroup apps + * @todo: + * - persistent connections + * - select outgoing http version + * - optionally follow redirect + * - check request uri for invalid characters? (e.g. encode spaces) + * - IPv6 support + */ + +#include "lwip/apps/http_client.h" + +#include "lwip/altcp_tcp.h" +#include "lwip/dns.h" +#include "lwip/debug.h" +#include "lwip/mem.h" +#include "lwip/altcp_tls.h" +#include "lwip/init.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#if LWIP_TCP && LWIP_CALLBACK_API + +/** + * HTTPC_DEBUG: Enable debugging for HTTP client. + */ +#ifndef HTTPC_DEBUG +#define HTTPC_DEBUG LWIP_DBG_OFF +#endif + +/** Set this to 1 to keep server name and uri in request state */ +#ifndef HTTPC_DEBUG_REQUEST +#define HTTPC_DEBUG_REQUEST 0 +#endif + +/** This string is passed in the HTTP header as "User-Agent: " */ +#ifndef HTTPC_CLIENT_AGENT +#define HTTPC_CLIENT_AGENT "lwIP/" LWIP_VERSION_STRING " (http://savannah.nongnu.org/projects/lwip)" +#endif + +/* the various debug levels for this file */ +#define HTTPC_DEBUG_TRACE (HTTPC_DEBUG | LWIP_DBG_TRACE) +#define HTTPC_DEBUG_STATE (HTTPC_DEBUG | LWIP_DBG_STATE) +#define HTTPC_DEBUG_WARN (HTTPC_DEBUG | LWIP_DBG_LEVEL_WARNING) +#define HTTPC_DEBUG_WARN_STATE (HTTPC_DEBUG | LWIP_DBG_LEVEL_WARNING | LWIP_DBG_STATE) +#define HTTPC_DEBUG_SERIOUS (HTTPC_DEBUG | LWIP_DBG_LEVEL_SERIOUS) + +#define HTTPC_POLL_INTERVAL 1 +#define HTTPC_POLL_TIMEOUT 30 /* 15 seconds */ + +#define HTTPC_CONTENT_LEN_INVALID 0xFFFFFFFF + +/* GET request basic */ +#define HTTPC_REQ_11 "GET %s HTTP/1.1\r\n" /* URI */\ + "User-Agent: %s\r\n" /* User-Agent */ \ + "Accept: */*\r\n" \ + "Connection: Close\r\n" /* we don't support persistent connections, yet */ \ + "\r\n" +#define HTTPC_REQ_11_FORMAT(uri) HTTPC_REQ_11, uri, HTTPC_CLIENT_AGENT + +/* GET request with host */ +#define HTTPC_REQ_11_HOST "GET %s HTTP/1.1\r\n" /* URI */\ + "User-Agent: %s\r\n" /* User-Agent */ \ + "Accept: */*\r\n" \ + "Host: %s\r\n" /* server name */ \ + "Connection: Close\r\n" /* we don't support persistent connections, yet */ \ + "\r\n" +#define HTTPC_REQ_11_HOST_FORMAT(uri, srv_name) HTTPC_REQ_11_HOST, uri, HTTPC_CLIENT_AGENT, srv_name + +/* GET request with proxy */ +#define HTTPC_REQ_11_PROXY "GET http://%s%s HTTP/1.1\r\n" /* HOST, URI */\ + "User-Agent: %s\r\n" /* User-Agent */ \ + "Accept: */*\r\n" \ + "Host: %s\r\n" /* server name */ \ + "Connection: Close\r\n" /* we don't support persistent connections, yet */ \ + "\r\n" +#define HTTPC_REQ_11_PROXY_FORMAT(host, uri, srv_name) HTTPC_REQ_11_PROXY, host, uri, HTTPC_CLIENT_AGENT, srv_name + +/* GET request with proxy (non-default server port) */ +#define HTTPC_REQ_11_PROXY_PORT "GET http://%s:%d%s HTTP/1.1\r\n" /* HOST, host-port, URI */\ + "User-Agent: %s\r\n" /* User-Agent */ \ + "Accept: */*\r\n" \ + "Host: %s\r\n" /* server name */ \ + "Connection: Close\r\n" /* we don't support persistent connections, yet */ \ + "\r\n" +#define HTTPC_REQ_11_PROXY_PORT_FORMAT(host, host_port, uri, srv_name) HTTPC_REQ_11_PROXY_PORT, host, host_port, uri, HTTPC_CLIENT_AGENT, srv_name + +typedef enum ehttpc_parse_state { + HTTPC_PARSE_WAIT_FIRST_LINE = 0, + HTTPC_PARSE_WAIT_HEADERS, + HTTPC_PARSE_RX_DATA +} httpc_parse_state_t; + +typedef struct _httpc_state +{ + struct altcp_pcb* pcb; + ip_addr_t remote_addr; + u16_t remote_port; + int timeout_ticks; + struct pbuf *request; + struct pbuf *rx_hdrs; + u16_t rx_http_version; + u16_t rx_status; + altcp_recv_fn recv_fn; + const httpc_connection_t *conn_settings; + void* callback_arg; + u32_t rx_content_len; + u32_t hdr_content_len; + httpc_parse_state_t parse_state; +#if HTTPC_DEBUG_REQUEST + char* server_name; + char* uri; +#endif +} httpc_state_t; + +/** Free http client state and deallocate all resources within */ +static err_t +httpc_free_state(httpc_state_t* req) +{ + struct altcp_pcb* tpcb; + + if (req->request != NULL) { + pbuf_free(req->request); + req->request = NULL; + } + if (req->rx_hdrs != NULL) { + pbuf_free(req->rx_hdrs); + req->rx_hdrs = NULL; + } + + tpcb = req->pcb; + mem_free(req); + req = NULL; + + if (tpcb != NULL) { + err_t r; + altcp_arg(tpcb, NULL); + altcp_recv(tpcb, NULL); + altcp_err(tpcb, NULL); + altcp_poll(tpcb, NULL, 0); + altcp_sent(tpcb, NULL); + r = altcp_close(tpcb); + if (r != ERR_OK) { + altcp_abort(tpcb); + return ERR_ABRT; + } + } + return ERR_OK; +} + +/** Close the connection: call finished callback and free the state */ +static err_t +httpc_close(httpc_state_t* req, httpc_result_t result, u32_t server_response, err_t err) +{ + if (req != NULL) { + if (req->conn_settings != NULL) { + if (req->conn_settings->result_fn != NULL) { + req->conn_settings->result_fn(req->callback_arg, result, req->rx_content_len, server_response, err); + } + } + return httpc_free_state(req); + } + return ERR_OK; +} + +/** Parse http header response line 1 */ +static err_t +http_parse_response_status(struct pbuf *p, u16_t *http_version, u16_t *http_status, u16_t *http_status_str_offset) +{ + u16_t end1 = pbuf_memfind(p, "\r\n", 2, 0); + if (end1 != 0xFFFF) { + /* get parts of first line */ + u16_t space1, space2; + space1 = pbuf_memfind(p, " ", 1, 0); + if (space1 != 0xFFFF) { + if ((pbuf_memcmp(p, 0, "HTTP/", 5) == 0) && (pbuf_get_at(p, 6) == '.')) { + char status_num[10]; + size_t status_num_len; + /* parse http version */ + u16_t version = pbuf_get_at(p, 5) - '0'; + version <<= 8; + version |= pbuf_get_at(p, 7) - '0'; + *http_version = version; + + /* parse http status number */ + space2 = pbuf_memfind(p, " ", 1, space1 + 1); + if (space2 != 0xFFFF) { + *http_status_str_offset = space2 + 1; + status_num_len = space2 - space1 - 1; + } else { + status_num_len = end1 - space1 - 1; + } + memset(status_num, 0, sizeof(status_num)); + if (pbuf_copy_partial(p, status_num, (u16_t)status_num_len, space1 + 1) == status_num_len) { + int status = atoi(status_num); + if ((status > 0) && (status <= 0xFFFF)) { + *http_status = (u16_t)status; + return ERR_OK; + } + } + } + } + } + return ERR_VAL; +} + +/** Wait for all headers to be received, return its length and content-length (if available) */ +static err_t +http_wait_headers(struct pbuf *p, u32_t *content_length, u16_t *total_header_len) +{ + u16_t end1 = pbuf_memfind(p, "\r\n\r\n", 4, 0); + if (end1 < (0xFFFF - 2)) { + /* all headers received */ + /* check if we have a content length (@todo: case insensitive?) */ + u16_t content_len_hdr; + *content_length = HTTPC_CONTENT_LEN_INVALID; + *total_header_len = end1 + 4; + + content_len_hdr = pbuf_memfind(p, "Content-Length: ", 16, 0); + if (content_len_hdr != 0xFFFF) { + u16_t content_len_line_end = pbuf_memfind(p, "\r\n", 2, content_len_hdr); + if (content_len_line_end != 0xFFFF) { + char content_len_num[16]; + u16_t content_len_num_len = (u16_t)(content_len_line_end - content_len_hdr - 16); + memset(content_len_num, 0, sizeof(content_len_num)); + if (pbuf_copy_partial(p, content_len_num, content_len_num_len, content_len_hdr + 16) == content_len_num_len) { + int len = atoi(content_len_num); + if ((len >= 0) && ((u32_t)len < HTTPC_CONTENT_LEN_INVALID)) { + *content_length = (u32_t)len; + } + } + } + } + return ERR_OK; + } + return ERR_VAL; +} + +/** http client tcp recv callback */ +static err_t +httpc_tcp_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *p, err_t r) +{ + httpc_state_t* req = (httpc_state_t*)arg; + LWIP_UNUSED_ARG(r); + + if (p == NULL) { + httpc_result_t result; + if (req->parse_state != HTTPC_PARSE_RX_DATA) { + /* did not get RX data yet */ + result = HTTPC_RESULT_ERR_CLOSED; + } else if ((req->hdr_content_len != HTTPC_CONTENT_LEN_INVALID) && + (req->hdr_content_len != req->rx_content_len)) { + /* header has been received with content length but not all data received */ + result = HTTPC_RESULT_ERR_CONTENT_LEN; + } else { + /* receiving data and either all data received or no content length header */ + result = HTTPC_RESULT_OK; + } + return httpc_close(req, result, req->rx_status, ERR_OK); + } + if (req->parse_state != HTTPC_PARSE_RX_DATA) { + if (req->rx_hdrs == NULL) { + req->rx_hdrs = p; + } else { + pbuf_cat(req->rx_hdrs, p); + } + if (req->parse_state == HTTPC_PARSE_WAIT_FIRST_LINE) { + u16_t status_str_off; + err_t err = http_parse_response_status(req->rx_hdrs, &req->rx_http_version, &req->rx_status, &status_str_off); + if (err == ERR_OK) { + /* don't care status string */ + req->parse_state = HTTPC_PARSE_WAIT_HEADERS; + } + } + if (req->parse_state == HTTPC_PARSE_WAIT_HEADERS) { + u16_t total_header_len; + err_t err = http_wait_headers(req->rx_hdrs, &req->hdr_content_len, &total_header_len); + if (err == ERR_OK) { + struct pbuf *q; + /* full header received, send window update for header bytes and call into client callback */ + altcp_recved(pcb, total_header_len); + if (req->conn_settings) { + if (req->conn_settings->headers_done_fn) { + err = req->conn_settings->headers_done_fn(req, req->callback_arg, req->rx_hdrs, total_header_len, req->hdr_content_len); + if (err != ERR_OK) { + return httpc_close(req, HTTPC_RESULT_LOCAL_ABORT, req->rx_status, err); + } + } + } + /* hide header bytes in pbuf */ + q = pbuf_free_header(req->rx_hdrs, total_header_len); + p = q; + req->rx_hdrs = NULL; + /* go on with data */ + req->parse_state = HTTPC_PARSE_RX_DATA; + } + } + } + if ((p != NULL) && (req->parse_state == HTTPC_PARSE_RX_DATA)) { + req->rx_content_len += p->tot_len; + /* received valid data: reset timeout */ + req->timeout_ticks = HTTPC_POLL_TIMEOUT; + if (req->recv_fn != NULL) { + /* directly return here: the connection might already be aborted from the callback! */ + return req->recv_fn(req->callback_arg, pcb, p, r); + } else { + altcp_recved(pcb, p->tot_len); + pbuf_free(p); + } + } + return ERR_OK; +} + +/** http client tcp err callback */ +static void +httpc_tcp_err(void *arg, err_t err) +{ + httpc_state_t* req = (httpc_state_t*)arg; + if (req != NULL) { + /* pcb has already been deallocated */ + req->pcb = NULL; + httpc_close(req, HTTPC_RESULT_ERR_CLOSED, 0, err); + } +} + +/** http client tcp poll callback */ +static err_t +httpc_tcp_poll(void *arg, struct altcp_pcb *pcb) +{ + /* implement timeout */ + httpc_state_t* req = (httpc_state_t*)arg; + LWIP_UNUSED_ARG(pcb); + if (req != NULL) { + if (req->timeout_ticks) { + req->timeout_ticks--; + } + if (!req->timeout_ticks) { + return httpc_close(req, HTTPC_RESULT_ERR_TIMEOUT, 0, ERR_OK); + } + } + return ERR_OK; +} + +/** http client tcp sent callback */ +static err_t +httpc_tcp_sent(void *arg, struct altcp_pcb *pcb, u16_t len) +{ + /* nothing to do here for now */ + LWIP_UNUSED_ARG(arg); + LWIP_UNUSED_ARG(pcb); + LWIP_UNUSED_ARG(len); + return ERR_OK; +} + +/** http client tcp connected callback */ +static err_t +httpc_tcp_connected(void *arg, struct altcp_pcb *pcb, err_t err) +{ + err_t r; + httpc_state_t* req = (httpc_state_t*)arg; + LWIP_UNUSED_ARG(pcb); + LWIP_UNUSED_ARG(err); + + /* send request; last char is zero termination */ + r = altcp_write(req->pcb, req->request->payload, req->request->len - 1, TCP_WRITE_FLAG_COPY); + if (r != ERR_OK) { + /* could not write the single small request -> fail, don't retry */ + return httpc_close(req, HTTPC_RESULT_ERR_MEM, 0, r); + } + /* everything written, we can free the request */ + pbuf_free(req->request); + req->request = NULL; + + altcp_output(req->pcb); + return ERR_OK; +} + +/** Start the http request when the server IP addr is known */ +static err_t +httpc_get_internal_addr(httpc_state_t* req, const ip_addr_t *ipaddr) +{ + err_t err; + LWIP_ASSERT("req != NULL", req != NULL); + + if (&req->remote_addr != ipaddr) { + /* fill in remote addr if called externally */ + req->remote_addr = *ipaddr; + } + + err = altcp_connect(req->pcb, &req->remote_addr, req->remote_port, httpc_tcp_connected); + if (err == ERR_OK) { + return ERR_OK; + } + LWIP_DEBUGF(HTTPC_DEBUG_WARN_STATE, ("tcp_connect failed: %d\n", (int)err)); + return err; +} + +#if LWIP_DNS +/** DNS callback + * If ipaddr is non-NULL, resolving succeeded and the request can be sent, otherwise it failed. + */ +static void +httpc_dns_found(const char* hostname, const ip_addr_t *ipaddr, void *arg) +{ + httpc_state_t* req = (httpc_state_t*)arg; + err_t err; + httpc_result_t result; + + LWIP_UNUSED_ARG(hostname); + + if (ipaddr != NULL) { + err = httpc_get_internal_addr(req, ipaddr); + if (err == ERR_OK) { + return; + } + result = HTTPC_RESULT_ERR_CONNECT; + } else { + LWIP_DEBUGF(HTTPC_DEBUG_WARN_STATE, ("httpc_dns_found: failed to resolve hostname: %s\n", + hostname)); + result = HTTPC_RESULT_ERR_HOSTNAME; + err = ERR_ARG; + } + httpc_close(req, result, 0, err); +} +#endif /* LWIP_DNS */ + +/** Start the http request after converting 'server_name' to ip address (DNS or address string) */ +static err_t +httpc_get_internal_dns(httpc_state_t* req, const char* server_name) +{ + err_t err; + LWIP_ASSERT("req != NULL", req != NULL); + +#if LWIP_DNS + err = dns_gethostbyname(server_name, &req->remote_addr, httpc_dns_found, req); +#else + err = ipaddr_aton(server_name, &req->remote_addr) ? ERR_OK : ERR_ARG; +#endif + + if (err == ERR_OK) { + /* cached or IP-string */ + err = httpc_get_internal_addr(req, &req->remote_addr); + } else if (err == ERR_INPROGRESS) { + return ERR_OK; + } + return err; +} + +static int +httpc_create_request_string(const httpc_connection_t *settings, const char* server_name, int server_port, const char* uri, + int use_host, char *buffer, size_t buffer_size) +{ + if (settings->use_proxy) { + LWIP_ASSERT("server_name != NULL", server_name != NULL); + if (server_port != HTTP_DEFAULT_PORT) { + return snprintf(buffer, buffer_size, HTTPC_REQ_11_PROXY_PORT_FORMAT(server_name, server_port, uri, server_name)); + } else { + return snprintf(buffer, buffer_size, HTTPC_REQ_11_PROXY_FORMAT(server_name, uri, server_name)); + } + } else if (use_host) { + LWIP_ASSERT("server_name != NULL", server_name != NULL); + return snprintf(buffer, buffer_size, HTTPC_REQ_11_HOST_FORMAT(uri, server_name)); + } else { + return snprintf(buffer, buffer_size, HTTPC_REQ_11_FORMAT(uri)); + } +} + +/** Initialize the connection struct */ +static err_t +httpc_init_connection_common(httpc_state_t **connection, const httpc_connection_t *settings, const char* server_name, + u16_t server_port, const char* uri, altcp_recv_fn recv_fn, void* callback_arg, int use_host) +{ + size_t alloc_len; + mem_size_t mem_alloc_len; + int req_len, req_len2; + httpc_state_t *req; +#if HTTPC_DEBUG_REQUEST + size_t server_name_len, uri_len; +#endif + + LWIP_ASSERT("uri != NULL", uri != NULL); + + /* get request len */ + req_len = httpc_create_request_string(settings, server_name, server_port, uri, use_host, NULL, 0); + if ((req_len < 0) || (req_len > 0xFFFF)) { + return ERR_VAL; + } + /* alloc state and request in one block */ + alloc_len = sizeof(httpc_state_t); +#if HTTPC_DEBUG_REQUEST + server_name_len = server_name ? strlen(server_name) : 0; + uri_len = strlen(uri); + alloc_len += server_name_len + 1 + uri_len + 1; +#endif + mem_alloc_len = (mem_size_t)alloc_len; + if ((mem_alloc_len < alloc_len) || (req_len + 1 > 0xFFFF)) { + return ERR_VAL; + } + + req = (httpc_state_t*)mem_malloc((mem_size_t)alloc_len); + if(req == NULL) { + return ERR_MEM; + } + memset(req, 0, sizeof(httpc_state_t)); + req->timeout_ticks = HTTPC_POLL_TIMEOUT; + req->request = pbuf_alloc(PBUF_RAW, (u16_t)(req_len + 1), PBUF_RAM); + if (req->request == NULL) { + httpc_free_state(req); + return ERR_MEM; + } + if (req->request->next != NULL) { + /* need a pbuf in one piece */ + httpc_free_state(req); + return ERR_MEM; + } + req->hdr_content_len = HTTPC_CONTENT_LEN_INVALID; +#if HTTPC_DEBUG_REQUEST + req->server_name = (char*)(req + 1); + if (server_name) { + memcpy(req->server_name, server_name, server_name_len + 1); + } + req->uri = req->server_name + server_name_len + 1; + memcpy(req->uri, uri, uri_len + 1); +#endif + req->pcb = altcp_new(settings->altcp_allocator); + if(req->pcb == NULL) { + httpc_free_state(req); + return ERR_MEM; + } + req->remote_port = settings->use_proxy ? settings->proxy_port : server_port; + altcp_arg(req->pcb, req); + altcp_recv(req->pcb, httpc_tcp_recv); + altcp_err(req->pcb, httpc_tcp_err); + altcp_poll(req->pcb, httpc_tcp_poll, HTTPC_POLL_INTERVAL); + altcp_sent(req->pcb, httpc_tcp_sent); + + /* set up request buffer */ + req_len2 = httpc_create_request_string(settings, server_name, server_port, uri, use_host, + (char *)req->request->payload, req_len + 1); + if (req_len2 != req_len) { + httpc_free_state(req); + return ERR_VAL; + } + + req->recv_fn = recv_fn; + req->conn_settings = settings; + req->callback_arg = callback_arg; + + *connection = req; + return ERR_OK; +} + +/** + * Initialize the connection struct + */ +static err_t +httpc_init_connection(httpc_state_t **connection, const httpc_connection_t *settings, const char* server_name, + u16_t server_port, const char* uri, altcp_recv_fn recv_fn, void* callback_arg) +{ + return httpc_init_connection_common(connection, settings, server_name, server_port, uri, recv_fn, callback_arg, 1); +} + + +/** + * Initialize the connection struct (from IP address) + */ +static err_t +httpc_init_connection_addr(httpc_state_t **connection, const httpc_connection_t *settings, + const ip_addr_t* server_addr, u16_t server_port, const char* uri, + altcp_recv_fn recv_fn, void* callback_arg) +{ + char *server_addr_str = ipaddr_ntoa(server_addr); + if (server_addr_str == NULL) { + return ERR_VAL; + } + return httpc_init_connection_common(connection, settings, server_addr_str, server_port, uri, + recv_fn, callback_arg, 1); +} + +/** + * @ingroup httpc + * HTTP client API: get a file by passing server IP address + * + * @param server_addr IP address of the server to connect + * @param port tcp port of the server + * @param uri uri to get from the server, remember leading "/"! + * @param settings connection settings (callbacks, proxy, etc.) + * @param recv_fn the http body (not the headers) are passed to this callback + * @param callback_arg argument passed to all the callbacks + * @param connection retreives the connection handle (to match in callbacks) + * @return ERR_OK if starting the request succeeds (callback_fn will be called later) + * or an error code + */ +err_t +httpc_get_file(const ip_addr_t* server_addr, u16_t port, const char* uri, const httpc_connection_t *settings, + altcp_recv_fn recv_fn, void* callback_arg, httpc_state_t **connection) +{ + err_t err; + httpc_state_t* req; + + LWIP_ERROR("invalid parameters", (server_addr != NULL) && (uri != NULL) && (recv_fn != NULL), return ERR_ARG;); + + err = httpc_init_connection_addr(&req, settings, server_addr, port, + uri, recv_fn, callback_arg); + if (err != ERR_OK) { + return err; + } + + if (settings->use_proxy) { + err = httpc_get_internal_addr(req, &settings->proxy_addr); + } else { + err = httpc_get_internal_addr(req, server_addr); + } + if(err != ERR_OK) { + httpc_free_state(req); + return err; + } + + if (connection != NULL) { + *connection = req; + } + return ERR_OK; +} + +/** + * @ingroup httpc + * HTTP client API: get a file by passing server name as string (DNS name or IP address string) + * + * @param server_name server name as string (DNS name or IP address string) + * @param port tcp port of the server + * @param uri uri to get from the server, remember leading "/"! + * @param settings connection settings (callbacks, proxy, etc.) + * @param recv_fn the http body (not the headers) are passed to this callback + * @param callback_arg argument passed to all the callbacks + * @param connection retreives the connection handle (to match in callbacks) + * @return ERR_OK if starting the request succeeds (callback_fn will be called later) + * or an error code + */ +err_t +httpc_get_file_dns(const char* server_name, u16_t port, const char* uri, const httpc_connection_t *settings, + altcp_recv_fn recv_fn, void* callback_arg, httpc_state_t **connection) +{ + err_t err; + httpc_state_t* req; + + LWIP_ERROR("invalid parameters", (server_name != NULL) && (uri != NULL) && (recv_fn != NULL), return ERR_ARG;); + + err = httpc_init_connection(&req, settings, server_name, port, uri, recv_fn, callback_arg); + if (err != ERR_OK) { + return err; + } + + if (settings->use_proxy) { + err = httpc_get_internal_addr(req, &settings->proxy_addr); + } else { + err = httpc_get_internal_dns(req, server_name); + } + if(err != ERR_OK) { + httpc_free_state(req); + return err; + } + + if (connection != NULL) { + *connection = req; + } + return ERR_OK; +} + +#if LWIP_HTTPC_HAVE_FILE_IO +/* Implementation to disk via fopen/fwrite/fclose follows */ + +typedef struct _httpc_filestate +{ + const char* local_file_name; + FILE *file; + httpc_connection_t settings; + const httpc_connection_t *client_settings; + void *callback_arg; +} httpc_filestate_t; + +static void httpc_fs_result(void *arg, httpc_result_t httpc_result, u32_t rx_content_len, + u32_t srv_res, err_t err); + +/** Initialize http client state for download to file system */ +static err_t +httpc_fs_init(httpc_filestate_t **filestate_out, const char* local_file_name, + const httpc_connection_t *settings, void* callback_arg) +{ + httpc_filestate_t *filestate; + size_t file_len, alloc_len; + FILE *f; + + file_len = strlen(local_file_name); + alloc_len = sizeof(httpc_filestate_t) + file_len + 1; + + filestate = (httpc_filestate_t *)mem_malloc((mem_size_t)alloc_len); + if (filestate == NULL) { + return ERR_MEM; + } + memset(filestate, 0, sizeof(httpc_filestate_t)); + filestate->local_file_name = (const char *)(filestate + 1); + memcpy((char *)(filestate + 1), local_file_name, file_len + 1); + filestate->file = NULL; + filestate->client_settings = settings; + filestate->callback_arg = callback_arg; + /* copy client settings but override result callback */ + memcpy(&filestate->settings, settings, sizeof(httpc_connection_t)); + filestate->settings.result_fn = httpc_fs_result; + + f = fopen(local_file_name, "wb"); + if(f == NULL) { + /* could not open file */ + mem_free(filestate); + return ERR_VAL; + } + filestate->file = f; + *filestate_out = filestate; + return ERR_OK; +} + +/** Free http client state for download to file system */ +static void +httpc_fs_free(httpc_filestate_t *filestate) +{ + if (filestate != NULL) { + if (filestate->file != NULL) { + fclose(filestate->file); + filestate->file = NULL; + } + mem_free(filestate); + } +} + +/** Connection closed (success or error) */ +static void +httpc_fs_result(void *arg, httpc_result_t httpc_result, u32_t rx_content_len, + u32_t srv_res, err_t err) +{ + httpc_filestate_t *filestate = (httpc_filestate_t *)arg; + if (filestate != NULL) { + if (filestate->client_settings->result_fn != NULL) { + filestate->client_settings->result_fn(filestate->callback_arg, httpc_result, rx_content_len, + srv_res, err); + } + httpc_fs_free(filestate); + } +} + +/** tcp recv callback */ +static err_t +httpc_fs_tcp_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *p, err_t err) +{ + httpc_filestate_t *filestate = (httpc_filestate_t*)arg; + struct pbuf* q; + LWIP_UNUSED_ARG(err); + + LWIP_ASSERT("p != NULL", p != NULL); + + for (q = p; q != NULL; q = q->next) { + fwrite(q->payload, 1, q->len, filestate->file); + } + altcp_recved(pcb, p->tot_len); + pbuf_free(p); + return ERR_OK; +} + +/** + * @ingroup httpc + * HTTP client API: get a file to disk by passing server IP address + * + * @param server_addr IP address of the server to connect + * @param port tcp port of the server + * @param uri uri to get from the server, remember leading "/"! + * @param settings connection settings (callbacks, proxy, etc.) + * @param callback_arg argument passed to all the callbacks + * @param connection retreives the connection handle (to match in callbacks) + * @return ERR_OK if starting the request succeeds (callback_fn will be called later) + * or an error code + */ +err_t +httpc_get_file_to_disk(const ip_addr_t* server_addr, u16_t port, const char* uri, const httpc_connection_t *settings, + void* callback_arg, const char* local_file_name, httpc_state_t **connection) +{ + err_t err; + httpc_state_t* req; + httpc_filestate_t *filestate; + + LWIP_ERROR("invalid parameters", (server_addr != NULL) && (uri != NULL) && (local_file_name != NULL), return ERR_ARG;); + + err = httpc_fs_init(&filestate, local_file_name, settings, callback_arg); + if (err != ERR_OK) { + return err; + } + + err = httpc_init_connection_addr(&req, &filestate->settings, server_addr, port, + uri, httpc_fs_tcp_recv, filestate); + if (err != ERR_OK) { + httpc_fs_free(filestate); + return err; + } + + if (settings->use_proxy) { + err = httpc_get_internal_addr(req, &settings->proxy_addr); + } else { + err = httpc_get_internal_addr(req, server_addr); + } + if(err != ERR_OK) { + httpc_fs_free(filestate); + httpc_free_state(req); + return err; + } + + if (connection != NULL) { + *connection = req; + } + return ERR_OK; +} + +/** + * @ingroup httpc + * HTTP client API: get a file to disk by passing server name as string (DNS name or IP address string) + * + * @param server_name server name as string (DNS name or IP address string) + * @param port tcp port of the server + * @param uri uri to get from the server, remember leading "/"! + * @param settings connection settings (callbacks, proxy, etc.) + * @param callback_arg argument passed to all the callbacks + * @param connection retreives the connection handle (to match in callbacks) + * @return ERR_OK if starting the request succeeds (callback_fn will be called later) + * or an error code + */ +err_t +httpc_get_file_dns_to_disk(const char* server_name, u16_t port, const char* uri, const httpc_connection_t *settings, + void* callback_arg, const char* local_file_name, httpc_state_t **connection) +{ + err_t err; + httpc_state_t* req; + httpc_filestate_t *filestate; + + LWIP_ERROR("invalid parameters", (server_name != NULL) && (uri != NULL) && (local_file_name != NULL), return ERR_ARG;); + + err = httpc_fs_init(&filestate, local_file_name, settings, callback_arg); + if (err != ERR_OK) { + return err; + } + + err = httpc_init_connection(&req, &filestate->settings, server_name, port, + uri, httpc_fs_tcp_recv, filestate); + if (err != ERR_OK) { + httpc_fs_free(filestate); + return err; + } + + if (settings->use_proxy) { + err = httpc_get_internal_addr(req, &settings->proxy_addr); + } else { + err = httpc_get_internal_dns(req, server_name); + } + if(err != ERR_OK) { + httpc_fs_free(filestate); + httpc_free_state(req); + return err; + } + + if (connection != NULL) { + *connection = req; + } + return ERR_OK; +} +#endif /* LWIP_HTTPC_HAVE_FILE_IO */ + +#endif /* LWIP_TCP && LWIP_CALLBACK_API */ diff --git a/lib/lwip/apps/tftp/tftp.c b/lib/lwip/apps/tftp/tftp.c new file mode 100644 index 0000000000..ddfdbfc0c1 --- /dev/null +++ b/lib/lwip/apps/tftp/tftp.c @@ -0,0 +1,548 @@ +/** + * + * @file tftp.c + * + * @author Logan Gunthorpe logang@deltatee.com + * Dirk Ziegelmeier dziegel@gmx.de + * + * @brief Trivial File Transfer Protocol (RFC 1350) + * + * Copyright (c) Deltatee Enterprises Ltd. 2013 + * All rights reserved. + * + */ + +/* + * Redistribution and use in source and binary forms, with or without + * modification,are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Author: Logan Gunthorpe logang@deltatee.com + * Dirk Ziegelmeier dziegel@gmx.de + * + */ + +/** + * @defgroup tftp TFTP client/server + * @ingroup apps + * + * This is simple TFTP client/server for the lwIP raw API. + * You need to increase MEMP_NUM_SYS_TIMEOUT by one if you use TFTP! + */ + +#include "lwip/apps/tftp_client.h" +#include "lwip/apps/tftp_server.h" + +#if LWIP_UDP + +#include "lwip/udp.h" +#include "lwip/timeouts.h" +#include "lwip/debug.h" + +#define TFTP_MAX_PAYLOAD_SIZE 512 +#define TFTP_HEADER_LENGTH 4 + +#define TFTP_RRQ 1 +#define TFTP_WRQ 2 +#define TFTP_DATA 3 +#define TFTP_ACK 4 +#define TFTP_ERROR 5 + +enum tftp_error { + TFTP_ERROR_FILE_NOT_FOUND = 1, + TFTP_ERROR_ACCESS_VIOLATION = 2, + TFTP_ERROR_DISK_FULL = 3, + TFTP_ERROR_ILLEGAL_OPERATION = 4, + TFTP_ERROR_UNKNOWN_TRFR_ID = 5, + TFTP_ERROR_FILE_EXISTS = 6, + TFTP_ERROR_NO_SUCH_USER = 7 +}; + +#include <string.h> + +struct tftp_state { + const struct tftp_context *ctx; + void *handle; + struct pbuf *last_data; + struct udp_pcb *upcb; + ip_addr_t addr; + u16_t port; + int timer; + int last_pkt; + u16_t blknum; + u8_t retries; + u8_t mode_write; + u8_t tftp_mode; +}; + +static struct tftp_state tftp_state; + +static void tftp_tmr(void *arg); + +static void +close_handle(void) +{ + tftp_state.port = 0; + ip_addr_set_any(0, &tftp_state.addr); + + if (tftp_state.last_data != NULL) { + pbuf_free(tftp_state.last_data); + tftp_state.last_data = NULL; + } + + sys_untimeout(tftp_tmr, NULL); + + if (tftp_state.handle) { + tftp_state.ctx->close(tftp_state.handle); + tftp_state.handle = NULL; + LWIP_DEBUGF(TFTP_DEBUG | LWIP_DBG_STATE, ("tftp: closing\n")); + } +} + +static struct pbuf* +init_packet(u16_t opcode, u16_t extra, size_t size) +{ + struct pbuf* p = pbuf_alloc(PBUF_TRANSPORT, (u16_t)(TFTP_HEADER_LENGTH + size), PBUF_RAM); + u16_t* payload; + + if (p != NULL) { + payload = (u16_t*) p->payload; + payload[0] = PP_HTONS(opcode); + payload[1] = lwip_htons(extra); + } + + return p; +} + +static err_t +send_request(const ip_addr_t *addr, u16_t port, u16_t opcode, const char* fname, const char* mode) +{ + size_t fname_length = strlen(fname)+1; + size_t mode_length = strlen(mode)+1; + struct pbuf* p = init_packet(opcode, 0, fname_length + mode_length - 2); + char* payload; + err_t ret; + + if (p == NULL) { + return ERR_MEM; + } + + payload = (char*) p->payload; + MEMCPY(payload+2, fname, fname_length); + MEMCPY(payload+2+fname_length, mode, mode_length); + + ret = udp_sendto(tftp_state.upcb, p, addr, port); + pbuf_free(p); + return ret; +} + +static err_t +send_error(const ip_addr_t *addr, u16_t port, enum tftp_error code, const char *str) +{ + int str_length = strlen(str); + struct pbuf *p; + u16_t *payload; + err_t ret; + + p = init_packet(TFTP_ERROR, code, str_length + 1); + if (p == NULL) { + return ERR_MEM; + } + + payload = (u16_t *) p->payload; + MEMCPY(&payload[2], str, str_length + 1); + + ret = udp_sendto(tftp_state.upcb, p, addr, port); + pbuf_free(p); + return ret; +} + +static err_t +send_ack(const ip_addr_t *addr, u16_t port, u16_t blknum) +{ + struct pbuf *p; + err_t ret; + + p = init_packet(TFTP_ACK, blknum, 0); + if (p == NULL) { + return ERR_MEM; + } + + ret = udp_sendto(tftp_state.upcb, p, addr, port); + pbuf_free(p); + return ret; +} + +static err_t +resend_data(const ip_addr_t *addr, u16_t port) +{ + err_t ret; + struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, tftp_state.last_data->len, PBUF_RAM); + if (p == NULL) { + return ERR_MEM; + } + + ret = pbuf_copy(p, tftp_state.last_data); + if (ret != ERR_OK) { + pbuf_free(p); + return ret; + } + + ret = udp_sendto(tftp_state.upcb, p, addr, port); + pbuf_free(p); + return ret; +} + +static void +send_data(const ip_addr_t *addr, u16_t port) +{ + u16_t *payload; + int ret; + + if (tftp_state.last_data != NULL) { + pbuf_free(tftp_state.last_data); + } + + tftp_state.last_data = init_packet(TFTP_DATA, tftp_state.blknum, TFTP_MAX_PAYLOAD_SIZE); + if (tftp_state.last_data == NULL) { + return; + } + + payload = (u16_t *) tftp_state.last_data->payload; + + ret = tftp_state.ctx->read(tftp_state.handle, &payload[2], TFTP_MAX_PAYLOAD_SIZE); + if (ret < 0) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "Error occurred while reading the file."); + close_handle(); + return; + } + + pbuf_realloc(tftp_state.last_data, (u16_t)(TFTP_HEADER_LENGTH + ret)); + resend_data(addr, port); +} + +static void +tftp_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) +{ + u16_t *sbuf = (u16_t *) p->payload; + int opcode; + + LWIP_UNUSED_ARG(arg); + LWIP_UNUSED_ARG(upcb); + + if (((tftp_state.port != 0) && (port != tftp_state.port)) || + (!ip_addr_isany_val(tftp_state.addr) && !ip_addr_eq(&tftp_state.addr, addr))) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "Only one connection at a time is supported"); + pbuf_free(p); + return; + } + + opcode = sbuf[0]; + + tftp_state.last_pkt = tftp_state.timer; + tftp_state.retries = 0; + + switch (opcode) { + case PP_HTONS(TFTP_RRQ): /* fall through */ + case PP_HTONS(TFTP_WRQ): { + const char tftp_null = 0; + char filename[TFTP_MAX_FILENAME_LEN + 1]; + char mode[TFTP_MAX_MODE_LEN + 1]; + u16_t filename_end_offset; + u16_t mode_end_offset; + + if (tftp_state.handle != NULL) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "Only one connection at a time is supported"); + break; + } + + if ((tftp_state.tftp_mode & LWIP_TFTP_MODE_SERVER) == 0) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "TFTP server not enabled"); + break; + } + + sys_timeout(TFTP_TIMER_MSECS, tftp_tmr, NULL); + + /* find \0 in pbuf -> end of filename string */ + filename_end_offset = pbuf_memfind(p, &tftp_null, sizeof(tftp_null), 2); + if ((u16_t)(filename_end_offset - 1) > sizeof(filename)) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "Filename too long/not NULL terminated"); + break; + } + pbuf_copy_partial(p, filename, filename_end_offset - 1, 2); + + /* find \0 in pbuf -> end of mode string */ + mode_end_offset = pbuf_memfind(p, &tftp_null, sizeof(tftp_null), filename_end_offset + 1); + if ((u16_t)(mode_end_offset - filename_end_offset) > sizeof(mode)) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "Mode too long/not NULL terminated"); + break; + } + pbuf_copy_partial(p, mode, mode_end_offset - filename_end_offset, filename_end_offset + 1); + + tftp_state.handle = tftp_state.ctx->open(filename, mode, opcode == PP_HTONS(TFTP_WRQ)); + tftp_state.blknum = 1; + + if (!tftp_state.handle) { + send_error(addr, port, TFTP_ERROR_FILE_NOT_FOUND, "Unable to open requested file."); + break; + } + + LWIP_DEBUGF(TFTP_DEBUG | LWIP_DBG_STATE, ("tftp: %s request from ", (opcode == PP_HTONS(TFTP_WRQ)) ? "write" : "read")); + ip_addr_debug_print(TFTP_DEBUG | LWIP_DBG_STATE, addr); + LWIP_DEBUGF(TFTP_DEBUG | LWIP_DBG_STATE, (" for '%s' mode '%s'\n", filename, mode)); + + ip_addr_copy(tftp_state.addr, *addr); + tftp_state.port = port; + + if (opcode == PP_HTONS(TFTP_WRQ)) { + tftp_state.mode_write = 1; + send_ack(addr, port, 0); + } else { + tftp_state.mode_write = 0; + send_data(addr, port); + } + + break; + } + + case PP_HTONS(TFTP_DATA): { + int ret; + u16_t blknum; + + if (tftp_state.handle == NULL) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "No connection"); + break; + } + + if (tftp_state.mode_write != 1) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "Not a write connection"); + break; + } + + blknum = lwip_ntohs(sbuf[1]); + if (blknum == tftp_state.blknum) { + pbuf_remove_header(p, TFTP_HEADER_LENGTH); + + ret = tftp_state.ctx->write(tftp_state.handle, p); + if (ret < 0) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "error writing file"); + close_handle(); + } else { + send_ack(addr, port, blknum); + } + + if (p->tot_len < TFTP_MAX_PAYLOAD_SIZE) { + close_handle(); + } else { + tftp_state.blknum++; + } + } else if ((u16_t)(blknum + 1) == tftp_state.blknum) { + /* retransmit of previous block, ack again (casting to u16_t to care for overflow) */ + send_ack(addr, port, blknum); + } else { + send_error(addr, port, TFTP_ERROR_UNKNOWN_TRFR_ID, "Wrong block number"); + } + break; + } + + case PP_HTONS(TFTP_ACK): { + u16_t blknum; + int lastpkt; + + if (tftp_state.handle == NULL) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "No connection"); + break; + } + + if (tftp_state.mode_write != 0) { + send_error(addr, port, TFTP_ERROR_ACCESS_VIOLATION, "Not a read connection"); + break; + } + + blknum = lwip_ntohs(sbuf[1]); + if (blknum != tftp_state.blknum) { + send_error(addr, port, TFTP_ERROR_UNKNOWN_TRFR_ID, "Wrong block number"); + break; + } + + lastpkt = 0; + + if (tftp_state.last_data != NULL) { + lastpkt = tftp_state.last_data->tot_len != (TFTP_MAX_PAYLOAD_SIZE + TFTP_HEADER_LENGTH); + } + + if (!lastpkt) { + tftp_state.blknum++; + send_data(addr, port); + } else { + close_handle(); + } + + break; + } + case PP_HTONS(TFTP_ERROR): + if (tftp_state.handle != NULL) { + pbuf_remove_header(p, TFTP_HEADER_LENGTH); + tftp_state.ctx->error(tftp_state.handle, sbuf[1], (const char*)p->payload, p->len); + close_handle(); + } + break; + default: + send_error(addr, port, TFTP_ERROR_ILLEGAL_OPERATION, "Unknown operation"); + break; + } + + pbuf_free(p); +} + +static void +tftp_tmr(void *arg) +{ + LWIP_UNUSED_ARG(arg); + + tftp_state.timer++; + + if (tftp_state.handle == NULL) { + return; + } + + sys_timeout(TFTP_TIMER_MSECS, tftp_tmr, NULL); + + if ((tftp_state.timer - tftp_state.last_pkt) > (TFTP_TIMEOUT_MSECS / TFTP_TIMER_MSECS)) { + if ((tftp_state.last_data != NULL) && (tftp_state.retries < TFTP_MAX_RETRIES)) { + LWIP_DEBUGF(TFTP_DEBUG | LWIP_DBG_STATE, ("tftp: timeout, retrying\n")); + resend_data(&tftp_state.addr, tftp_state.port); + tftp_state.retries++; + } else { + LWIP_DEBUGF(TFTP_DEBUG | LWIP_DBG_STATE, ("tftp: timeout\n")); + close_handle(); + } + } +} + +/** + * Initialize TFTP client/server. + * @param mode TFTP mode (client/server) + * @param ctx TFTP callback struct + */ +err_t +tftp_init_common(u8_t mode, const struct tftp_context *ctx) +{ + err_t ret; + + /* LWIP_ASSERT_CORE_LOCKED(); is checked by udp_new() */ + struct udp_pcb *pcb = udp_new_ip_type(IPADDR_TYPE_ANY); + if (pcb == NULL) { + return ERR_MEM; + } + + ret = udp_bind(pcb, IP_ANY_TYPE, TFTP_PORT); + if (ret != ERR_OK) { + udp_remove(pcb); + return ret; + } + + tftp_state.handle = NULL; + tftp_state.port = 0; + tftp_state.ctx = ctx; + tftp_state.timer = 0; + tftp_state.last_data = NULL; + tftp_state.upcb = pcb; + tftp_state.tftp_mode = mode; + + udp_recv(pcb, tftp_recv, NULL); + + return ERR_OK; +} + +/** @ingroup tftp + * Initialize TFTP server. + * @param ctx TFTP callback struct + */ +err_t +tftp_init_server(const struct tftp_context *ctx) +{ + return tftp_init_common(LWIP_TFTP_MODE_SERVER, ctx); +} + +/** @ingroup tftp + * Initialize TFTP client. + * @param ctx TFTP callback struct + */ +err_t +tftp_init_client(const struct tftp_context *ctx) +{ + return tftp_init_common(LWIP_TFTP_MODE_CLIENT, ctx); +} + +/** @ingroup tftp + * Deinitialize ("turn off") TFTP client/server. + */ +void tftp_cleanup(void) +{ + LWIP_ASSERT("Cleanup called on non-initialized TFTP", tftp_state.upcb != NULL); + udp_remove(tftp_state.upcb); + close_handle(); + memset(&tftp_state, 0, sizeof(tftp_state)); +} + +static const char * +mode_to_string(enum tftp_transfer_mode mode) +{ + if (mode == TFTP_MODE_OCTET) { + return "octet"; + } + if (mode == TFTP_MODE_NETASCII) { + return "netascii"; + } + if (mode == TFTP_MODE_BINARY) { + return "binary"; + } + return NULL; +} + +err_t +tftp_get(void* handle, const ip_addr_t *addr, u16_t port, const char* fname, enum tftp_transfer_mode mode) +{ + LWIP_ERROR("TFTP client is not enabled (tftp_init)", (tftp_state.tftp_mode & LWIP_TFTP_MODE_CLIENT) != 0, return ERR_VAL); + LWIP_ERROR("tftp_get: invalid file name", fname != NULL, return ERR_VAL); + LWIP_ERROR("tftp_get: invalid mode", mode <= TFTP_MODE_BINARY, return ERR_VAL); + + tftp_state.handle = handle; + tftp_state.blknum = 1; + tftp_state.mode_write = 1; /* We want to receive data */ + return send_request(addr, port, TFTP_RRQ, fname, mode_to_string(mode)); +} + +err_t +tftp_put(void* handle, const ip_addr_t *addr, u16_t port, const char* fname, enum tftp_transfer_mode mode) +{ + LWIP_ERROR("TFTP client is not enabled (tftp_init)", (tftp_state.tftp_mode & LWIP_TFTP_MODE_CLIENT) != 0, return ERR_VAL); + LWIP_ERROR("tftp_put: invalid file name", fname != NULL, return ERR_VAL); + LWIP_ERROR("tftp_put: invalid mode", mode <= TFTP_MODE_BINARY, return ERR_VAL); + + tftp_state.handle = handle; + tftp_state.blknum = 1; + tftp_state.mode_write = 0; /* We want to send data */ + return send_request(addr, port, TFTP_WRQ, fname, mode_to_string(mode)); +} + +#endif /* LWIP_UDP */ diff --git a/lib/lwip/core/altcp.c b/lib/lwip/core/altcp.c new file mode 100644 index 0000000000..9644e82d7d --- /dev/null +++ b/lib/lwip/core/altcp.c @@ -0,0 +1,717 @@ +/** + * @file + * @defgroup altcp Application layered TCP Functions + * @ingroup altcp_api + * + * This file contains the common functions for altcp to work. + * For more details see @ref altcp_api. + */ + +/** + * @defgroup altcp_api Application layered TCP Introduction + * @ingroup callbackstyle_api + * + * Overview + * -------- + * altcp (application layered TCP connection API; to be used from TCPIP thread) + * is an abstraction layer that prevents applications linking hard against the + * @ref tcp.h functions while providing the same functionality. It is used to + * e.g. add SSL/TLS (see LWIP_ALTCP_TLS) or proxy-connect support to an application + * written for the tcp callback API without that application knowing the + * protocol details. + * + * * This interface mimics the tcp callback API to the application while preventing + * direct linking (much like virtual functions). + * * This way, an application can make use of other application layer protocols + * on top of TCP without knowing the details (e.g. TLS, proxy connection). + * * This is achieved by simply including "lwip/altcp.h" instead of "lwip/tcp.h", + * replacing "struct tcp_pcb" with "struct altcp_pcb" and prefixing all functions + * with "altcp_" instead of "tcp_". + * + * With altcp support disabled (LWIP_ALTCP==0), applications written against the + * altcp API can still be compiled but are directly linked against the tcp.h + * callback API and then cannot use layered protocols. To minimize code changes + * in this case, the use of altcp_allocators is strongly suggested. + * + * Usage + * ----- + * To make use of this API from an existing tcp raw API application: + * * Include "lwip/altcp.h" instead of "lwip/tcp.h" + * * Replace "struct tcp_pcb" with "struct altcp_pcb" + * * Prefix all called tcp API functions with "altcp_" instead of "tcp_" to link + * against the altcp functions + * * @ref altcp_new (and @ref altcp_new_ip_type / @ref altcp_new_ip6) take + * an @ref altcp_allocator_t as an argument, whereas the original tcp API + * functions take no arguments. + * * An @ref altcp_allocator_t allocator is an object that holds a pointer to an + * allocator object and a corresponding state (e.g. for TLS, the corresponding + * state may hold certificates or keys). This way, the application does not + * even need to know if it uses TLS or pure TCP, this is handled at runtime + * by passing a specific allocator. + * * An application can alternatively bind hard to the altcp_tls API by calling + * @ref altcp_tls_new or @ref altcp_tls_wrap. + * * The TLS layer is not directly implemented by lwIP, but a port to mbedTLS is + * provided. + * * Another altcp layer is proxy-connect to use TLS behind a HTTP proxy (see + * @ref altcp_proxyconnect.h) + * + * altcp_allocator_t + * ----------------- + * An altcp allocator is created by the application by combining an allocator + * callback function and a corresponding state, e.g.:\code{.c} + * static const unsigned char cert[] = {0x2D, ... (see mbedTLS doc for how to create this)}; + * struct altcp_tls_config * conf = altcp_tls_create_config_client(cert, sizeof(cert)); + * altcp_allocator_t tls_allocator = { + * altcp_tls_alloc, conf + * }; + * \endcode + * + * + * struct altcp_tls_config + * ----------------------- + * The struct altcp_tls_config holds state that is needed to create new TLS client + * or server connections (e.g. certificates and private keys). + * + * It is not defined by lwIP itself but by the TLS port (e.g. altcp_tls to mbedTLS + * adaption). However, the parameters used to create it are defined in @ref + * altcp_tls.h (see @ref altcp_tls_create_config_server_privkey_cert for servers + * and @ref altcp_tls_create_config_client / @ref altcp_tls_create_config_client_2wayauth + * for clients). + * + * For mbedTLS, ensure that certificates can be parsed by 'mbedtls_x509_crt_parse()' and + * private keys can be parsed by 'mbedtls_pk_parse_key()'. + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/altcp.h" +#include "lwip/priv/altcp_priv.h" +#include "lwip/altcp_tcp.h" +#include "lwip/tcp.h" +#include "lwip/mem.h" + +#include <string.h> + +extern const struct altcp_functions altcp_tcp_functions; + +/** + * For altcp layer implementations only: allocate a new struct altcp_pcb from the pool + * and zero the memory + */ +struct altcp_pcb * +altcp_alloc(void) +{ + struct altcp_pcb *ret = (struct altcp_pcb *)memp_malloc(MEMP_ALTCP_PCB); + if (ret != NULL) { + memset(ret, 0, sizeof(struct altcp_pcb)); + } + return ret; +} + +/** + * For altcp layer implementations only: return a struct altcp_pcb to the pool + */ +void +altcp_free(struct altcp_pcb *conn) +{ + if (conn) { + if (conn->fns && conn->fns->dealloc) { + conn->fns->dealloc(conn); + } + memp_free(MEMP_ALTCP_PCB, conn); + } +} + +/** + * @ingroup altcp + * altcp_new_ip6: @ref altcp_new for IPv6 + */ +struct altcp_pcb * +altcp_new_ip6(altcp_allocator_t *allocator) +{ + return altcp_new_ip_type(allocator, IPADDR_TYPE_V6); +} + +/** + * @ingroup altcp + * altcp_new: @ref altcp_new for IPv4 + */ +struct altcp_pcb * +altcp_new(altcp_allocator_t *allocator) +{ + return altcp_new_ip_type(allocator, IPADDR_TYPE_V4); +} + +/** + * @ingroup altcp + * altcp_new_ip_type: called by applications to allocate a new pcb with the help of an + * allocator function. + * + * @param allocator allocator function and argument + * @param ip_type IP version of the pcb (@ref lwip_ip_addr_type) + * @return a new altcp_pcb or NULL on error + */ +struct altcp_pcb * +altcp_new_ip_type(altcp_allocator_t *allocator, u8_t ip_type) +{ + struct altcp_pcb *conn; + if (allocator == NULL) { + /* no allocator given, create a simple TCP connection */ + return altcp_tcp_new_ip_type(ip_type); + } + if (allocator->alloc == NULL) { + /* illegal allocator */ + return NULL; + } + conn = allocator->alloc(allocator->arg, ip_type); + if (conn == NULL) { + /* allocation failed */ + return NULL; + } + return conn; +} + +/** + * @ingroup altcp + * @see tcp_arg() + */ +void +altcp_arg(struct altcp_pcb *conn, void *arg) +{ + if (conn) { + conn->arg = arg; + } +} + +/** + * @ingroup altcp + * @see tcp_accept() + */ +void +altcp_accept(struct altcp_pcb *conn, altcp_accept_fn accept) +{ + if (conn != NULL) { + conn->accept = accept; + } +} + +/** + * @ingroup altcp + * @see tcp_recv() + */ +void +altcp_recv(struct altcp_pcb *conn, altcp_recv_fn recv) +{ + if (conn) { + conn->recv = recv; + } +} + +/** + * @ingroup altcp + * @see tcp_sent() + */ +void +altcp_sent(struct altcp_pcb *conn, altcp_sent_fn sent) +{ + if (conn) { + conn->sent = sent; + } +} + +/** + * @ingroup altcp + * @see tcp_poll() + */ +void +altcp_poll(struct altcp_pcb *conn, altcp_poll_fn poll, u8_t interval) +{ + if (conn) { + conn->poll = poll; + conn->pollinterval = interval; + if (conn->fns && conn->fns->set_poll) { + conn->fns->set_poll(conn, interval); + } + } +} + +/** + * @ingroup altcp + * @see tcp_err() + */ +void +altcp_err(struct altcp_pcb *conn, altcp_err_fn err) +{ + if (conn) { + conn->err = err; + } +} + +/* Generic functions calling the "virtual" ones */ + +/** + * @ingroup altcp + * @see tcp_recved() + */ +void +altcp_recved(struct altcp_pcb *conn, u16_t len) +{ + if (conn && conn->fns && conn->fns->recved) { + conn->fns->recved(conn, len); + } +} + +/** + * @ingroup altcp + * @see tcp_bind() + */ +err_t +altcp_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port) +{ + if (conn && conn->fns && conn->fns->bind) { + return conn->fns->bind(conn, ipaddr, port); + } + return ERR_VAL; +} + +/** + * @ingroup altcp + * @see tcp_connect() + */ +err_t +altcp_connect(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected) +{ + if (conn && conn->fns && conn->fns->connect) { + return conn->fns->connect(conn, ipaddr, port, connected); + } + return ERR_VAL; +} + +/** + * @ingroup altcp + * @see tcp_listen_with_backlog_and_err() + */ +struct altcp_pcb * +altcp_listen_with_backlog_and_err(struct altcp_pcb *conn, u8_t backlog, err_t *err) +{ + if (conn && conn->fns && conn->fns->listen) { + return conn->fns->listen(conn, backlog, err); + } + return NULL; +} + +/** + * @ingroup altcp + * @see tcp_abort() + */ +void +altcp_abort(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->abort) { + conn->fns->abort(conn); + } +} + +/** + * @ingroup altcp + * @see tcp_close() + */ +err_t +altcp_close(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->close) { + return conn->fns->close(conn); + } + return ERR_VAL; +} + +/** + * @ingroup altcp + * @see tcp_shutdown() + */ +err_t +altcp_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx) +{ + if (conn && conn->fns && conn->fns->shutdown) { + return conn->fns->shutdown(conn, shut_rx, shut_tx); + } + return ERR_VAL; +} + +/** + * @ingroup altcp + * @see tcp_write() + */ +err_t +altcp_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags) +{ + if (conn && conn->fns && conn->fns->write) { + return conn->fns->write(conn, dataptr, len, apiflags); + } + return ERR_VAL; +} + +/** + * @ingroup altcp + * @see tcp_output() + */ +err_t +altcp_output(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->output) { + return conn->fns->output(conn); + } + return ERR_VAL; +} + +/** + * @ingroup altcp + * @see tcp_mss() + */ +u16_t +altcp_mss(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->mss) { + return conn->fns->mss(conn); + } + return 0; +} + +/** + * @ingroup altcp + * @see tcp_sndbuf() + */ +u16_t +altcp_sndbuf(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->sndbuf) { + return conn->fns->sndbuf(conn); + } + return 0; +} + +/** + * @ingroup altcp + * @see tcp_sndqueuelen() + */ +u16_t +altcp_sndqueuelen(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->sndqueuelen) { + return conn->fns->sndqueuelen(conn); + } + return 0; +} + +void +altcp_nagle_disable(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->nagle_disable) { + conn->fns->nagle_disable(conn); + } +} + +void +altcp_nagle_enable(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->nagle_enable) { + conn->fns->nagle_enable(conn); + } +} + +int +altcp_nagle_disabled(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->nagle_disabled) { + return conn->fns->nagle_disabled(conn); + } + return 0; +} + +/** + * @ingroup altcp + * @see tcp_setprio() + */ +void +altcp_setprio(struct altcp_pcb *conn, u8_t prio) +{ + if (conn && conn->fns && conn->fns->setprio) { + conn->fns->setprio(conn, prio); + } +} + +err_t +altcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port) +{ + if (conn && conn->fns && conn->fns->addrinfo) { + return conn->fns->addrinfo(conn, local, addr, port); + } + return ERR_VAL; +} + +ip_addr_t * +altcp_get_ip(struct altcp_pcb *conn, int local) +{ + if (conn && conn->fns && conn->fns->getip) { + return conn->fns->getip(conn, local); + } + return NULL; +} + +u16_t +altcp_get_port(struct altcp_pcb *conn, int local) +{ + if (conn && conn->fns && conn->fns->getport) { + return conn->fns->getport(conn, local); + } + return 0; +} + +#if LWIP_TCP_KEEPALIVE +void +altcp_keepalive_disable(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->keepalive_disable) { + conn->fns->keepalive_disable(conn); + } +} + +void +altcp_keepalive_enable(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t count) +{ + if (conn && conn->fns && conn->fns->keepalive_enable) { + conn->fns->keepalive_enable(conn, idle, intvl, count); + } +} +#endif + +#ifdef LWIP_DEBUG +enum tcp_state +altcp_dbg_get_tcp_state(struct altcp_pcb *conn) +{ + if (conn && conn->fns && conn->fns->dbg_get_tcp_state) { + return conn->fns->dbg_get_tcp_state(conn); + } + return CLOSED; +} +#endif + +/* Default implementations for the "virtual" functions */ + +void +altcp_default_set_poll(struct altcp_pcb *conn, u8_t interval) +{ + if (conn && conn->inner_conn) { + altcp_poll(conn->inner_conn, conn->poll, interval); + } +} + +void +altcp_default_recved(struct altcp_pcb *conn, u16_t len) +{ + if (conn && conn->inner_conn) { + altcp_recved(conn->inner_conn, len); + } +} + +err_t +altcp_default_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port) +{ + if (conn && conn->inner_conn) { + return altcp_bind(conn->inner_conn, ipaddr, port); + } + return ERR_VAL; +} + +err_t +altcp_default_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx) +{ + if (conn) { + if (shut_rx && shut_tx && conn->fns && conn->fns->close) { + /* default shutdown for both sides is close */ + return conn->fns->close(conn); + } + if (conn->inner_conn) { + return altcp_shutdown(conn->inner_conn, shut_rx, shut_tx); + } + } + return ERR_VAL; +} + +err_t +altcp_default_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags) +{ + if (conn && conn->inner_conn) { + return altcp_write(conn->inner_conn, dataptr, len, apiflags); + } + return ERR_VAL; +} + +err_t +altcp_default_output(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + return altcp_output(conn->inner_conn); + } + return ERR_VAL; +} + +u16_t +altcp_default_mss(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + return altcp_mss(conn->inner_conn); + } + return 0; +} + +u16_t +altcp_default_sndbuf(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + return altcp_sndbuf(conn->inner_conn); + } + return 0; +} + +u16_t +altcp_default_sndqueuelen(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + return altcp_sndqueuelen(conn->inner_conn); + } + return 0; +} + +void +altcp_default_nagle_disable(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + altcp_nagle_disable(conn->inner_conn); + } +} + +void +altcp_default_nagle_enable(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + altcp_nagle_enable(conn->inner_conn); + } +} + +int +altcp_default_nagle_disabled(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + return altcp_nagle_disabled(conn->inner_conn); + } + return 0; +} + +void +altcp_default_setprio(struct altcp_pcb *conn, u8_t prio) +{ + if (conn && conn->inner_conn) { + altcp_setprio(conn->inner_conn, prio); + } +} + +void +altcp_default_dealloc(struct altcp_pcb *conn) +{ + LWIP_UNUSED_ARG(conn); + /* nothing to do */ +} + +err_t +altcp_default_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port) +{ + if (conn && conn->inner_conn) { + return altcp_get_tcp_addrinfo(conn->inner_conn, local, addr, port); + } + return ERR_VAL; +} + +ip_addr_t * +altcp_default_get_ip(struct altcp_pcb *conn, int local) +{ + if (conn && conn->inner_conn) { + return altcp_get_ip(conn->inner_conn, local); + } + return NULL; +} + +u16_t +altcp_default_get_port(struct altcp_pcb *conn, int local) +{ + if (conn && conn->inner_conn) { + return altcp_get_port(conn->inner_conn, local); + } + return 0; +} + +#if LWIP_TCP_KEEPALIVE +void +altcp_default_keepalive_disable(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + altcp_keepalive_disable(conn->inner_conn); + } +} + +void +altcp_default_keepalive_enable(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t count) +{ + if (conn && conn->inner_conn) { + altcp_keepalive_enable(conn->inner_conn, idle, intvl, count); + } +} +#endif + +#ifdef LWIP_DEBUG +enum tcp_state +altcp_default_dbg_get_tcp_state(struct altcp_pcb *conn) +{ + if (conn && conn->inner_conn) { + return altcp_dbg_get_tcp_state(conn->inner_conn); + } + return CLOSED; +} +#endif + + +#endif /* LWIP_ALTCP */ diff --git a/lib/lwip/core/altcp_alloc.c b/lib/lwip/core/altcp_alloc.c new file mode 100644 index 0000000000..06ed90d976 --- /dev/null +++ b/lib/lwip/core/altcp_alloc.c @@ -0,0 +1,87 @@ +/** + * @file + * Application layered TCP connection API (to be used from TCPIP thread)<br> + * This interface mimics the tcp callback API to the application while preventing + * direct linking (much like virtual functions). + * This way, an application can make use of other application layer protocols + * on top of TCP without knowing the details (e.g. TLS, proxy connection). + * + * This file contains allocation implementation that combine several layers. + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/altcp.h" +#include "lwip/altcp_tcp.h" +#include "lwip/altcp_tls.h" +#include "lwip/priv/altcp_priv.h" +#include "lwip/mem.h" + +#include <string.h> + +#if LWIP_ALTCP_TLS + +/** This standard allocator function creates an altcp pcb for + * TLS over TCP */ +struct altcp_pcb * +altcp_tls_new(struct altcp_tls_config *config, u8_t ip_type) +{ + struct altcp_pcb *inner_conn, *ret; + LWIP_UNUSED_ARG(ip_type); + + inner_conn = altcp_tcp_new_ip_type(ip_type); + if (inner_conn == NULL) { + return NULL; + } + ret = altcp_tls_wrap(config, inner_conn); + if (ret == NULL) { + altcp_close(inner_conn); + } + return ret; +} + +/** This standard allocator function creates an altcp pcb for + * TLS over TCP */ +struct altcp_pcb * +altcp_tls_alloc(void *arg, u8_t ip_type) +{ + return altcp_tls_new((struct altcp_tls_config *)arg, ip_type); +} + +#endif /* LWIP_ALTCP_TLS */ + +#endif /* LWIP_ALTCP */ diff --git a/lib/lwip/core/altcp_tcp.c b/lib/lwip/core/altcp_tcp.c new file mode 100644 index 0000000000..4f21b703aa --- /dev/null +++ b/lib/lwip/core/altcp_tcp.c @@ -0,0 +1,578 @@ +/** + * @file + * Application layered TCP connection API (to be used from TCPIP thread) + * + * This interface mimics the tcp callback API to the application while preventing + * direct linking (much like virtual functions). + * This way, an application can make use of other application layer protocols + * on top of TCP without knowing the details (e.g. TLS, proxy connection). + * + * This file contains the base implementation calling into tcp. + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/altcp.h" +#include "lwip/altcp_tcp.h" +#include "lwip/priv/altcp_priv.h" +#include "lwip/tcp.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/mem.h" + +#include <string.h> + +#define ALTCP_TCP_ASSERT_CONN(conn) do { \ + LWIP_ASSERT("conn->inner_conn == NULL", (conn)->inner_conn == NULL); \ + LWIP_UNUSED_ARG(conn); /* for LWIP_NOASSERT */ } while(0) +#define ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb) do { \ + LWIP_ASSERT("pcb mismatch", (conn)->state == tpcb); \ + LWIP_UNUSED_ARG(tpcb); /* for LWIP_NOASSERT */ \ + ALTCP_TCP_ASSERT_CONN(conn); } while(0) + + +/* Variable prototype, the actual declaration is at the end of this file + since it contains pointers to static functions declared here */ +extern const struct altcp_functions altcp_tcp_functions; + +static void altcp_tcp_setup(struct altcp_pcb *conn, struct tcp_pcb *tpcb); + +/* callback functions for TCP */ +static err_t +altcp_tcp_accept(void *arg, struct tcp_pcb *new_tpcb, err_t err) +{ + struct altcp_pcb *listen_conn = (struct altcp_pcb *)arg; + if (new_tpcb && listen_conn && listen_conn->accept) { + /* create a new altcp_conn to pass to the next 'accept' callback */ + struct altcp_pcb *new_conn = altcp_alloc(); + if (new_conn == NULL) { + return ERR_MEM; + } + altcp_tcp_setup(new_conn, new_tpcb); + return listen_conn->accept(listen_conn->arg, new_conn, err); + } + return ERR_ARG; +} + +static err_t +altcp_tcp_connected(void *arg, struct tcp_pcb *tpcb, err_t err) +{ + struct altcp_pcb *conn = (struct altcp_pcb *)arg; + if (conn) { + ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb); + if (conn->connected) { + return conn->connected(conn->arg, conn, err); + } + } + return ERR_OK; +} + +static err_t +altcp_tcp_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err) +{ + struct altcp_pcb *conn = (struct altcp_pcb *)arg; + if (conn) { + ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb); + if (conn->recv) { + return conn->recv(conn->arg, conn, p, err); + } + } + if (p != NULL) { + /* prevent memory leaks */ + pbuf_free(p); + } + return ERR_OK; +} + +static err_t +altcp_tcp_sent(void *arg, struct tcp_pcb *tpcb, u16_t len) +{ + struct altcp_pcb *conn = (struct altcp_pcb *)arg; + if (conn) { + ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb); + if (conn->sent) { + return conn->sent(conn->arg, conn, len); + } + } + return ERR_OK; +} + +static err_t +altcp_tcp_poll(void *arg, struct tcp_pcb *tpcb) +{ + struct altcp_pcb *conn = (struct altcp_pcb *)arg; + if (conn) { + ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb); + if (conn->poll) { + return conn->poll(conn->arg, conn); + } + } + return ERR_OK; +} + +static void +altcp_tcp_err(void *arg, err_t err) +{ + struct altcp_pcb *conn = (struct altcp_pcb *)arg; + if (conn) { + conn->state = NULL; /* already freed */ + if (conn->err) { + conn->err(conn->arg, err); + } + altcp_free(conn); + } +} + +/* setup functions */ + +static void +altcp_tcp_remove_callbacks(struct tcp_pcb *tpcb) +{ + tcp_arg(tpcb, NULL); + if (tpcb->state != LISTEN) { + tcp_recv(tpcb, NULL); + tcp_sent(tpcb, NULL); + tcp_err(tpcb, NULL); + tcp_poll(tpcb, NULL, tpcb->pollinterval); + } +} + +static void +altcp_tcp_setup_callbacks(struct altcp_pcb *conn, struct tcp_pcb *tpcb) +{ + tcp_arg(tpcb, conn); + /* this might be called for LISTN when close fails... */ + if (tpcb->state != LISTEN) { + tcp_recv(tpcb, altcp_tcp_recv); + tcp_sent(tpcb, altcp_tcp_sent); + tcp_err(tpcb, altcp_tcp_err); + /* tcp_poll is set when interval is set by application */ + } +} + +static void +altcp_tcp_setup(struct altcp_pcb *conn, struct tcp_pcb *tpcb) +{ + altcp_tcp_setup_callbacks(conn, tpcb); + conn->state = tpcb; + conn->fns = &altcp_tcp_functions; +} + +struct altcp_pcb * +altcp_tcp_new_ip_type(u8_t ip_type) +{ + /* Allocate the tcp pcb first to invoke the priority handling code + if we're out of pcbs */ + struct tcp_pcb *tpcb = tcp_new_ip_type(ip_type); + if (tpcb != NULL) { + struct altcp_pcb *ret = altcp_alloc(); + if (ret != NULL) { + altcp_tcp_setup(ret, tpcb); + return ret; + } else { + /* altcp_pcb allocation failed -> free the tcp_pcb too */ + tcp_close(tpcb); + } + } + return NULL; +} + +/** altcp_tcp allocator function fitting to @ref altcp_allocator_t / @ref altcp_new. +* +* arg pointer is not used for TCP. +*/ +struct altcp_pcb * +altcp_tcp_alloc(void *arg, u8_t ip_type) +{ + LWIP_UNUSED_ARG(arg); + return altcp_tcp_new_ip_type(ip_type); +} + +struct altcp_pcb * +altcp_tcp_wrap(struct tcp_pcb *tpcb) +{ + if (tpcb != NULL) { + struct altcp_pcb *ret = altcp_alloc(); + if (ret != NULL) { + altcp_tcp_setup(ret, tpcb); + return ret; + } + } + return NULL; +} + + +/* "virtual" functions calling into tcp */ +static void +altcp_tcp_set_poll(struct altcp_pcb *conn, u8_t interval) +{ + if (conn != NULL) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + tcp_poll(pcb, altcp_tcp_poll, interval); + } +} + +static void +altcp_tcp_recved(struct altcp_pcb *conn, u16_t len) +{ + if (conn != NULL) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + tcp_recved(pcb, len); + } +} + +static err_t +altcp_tcp_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return ERR_VAL; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + return tcp_bind(pcb, ipaddr, port); +} + +static err_t +altcp_tcp_connect(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return ERR_VAL; + } + ALTCP_TCP_ASSERT_CONN(conn); + conn->connected = connected; + pcb = (struct tcp_pcb *)conn->state; + return tcp_connect(pcb, ipaddr, port, altcp_tcp_connected); +} + +static struct altcp_pcb * +altcp_tcp_listen(struct altcp_pcb *conn, u8_t backlog, err_t *err) +{ + struct tcp_pcb *pcb; + struct tcp_pcb *lpcb; + if (conn == NULL) { + return NULL; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + lpcb = tcp_listen_with_backlog_and_err(pcb, backlog, err); + if (lpcb != NULL) { + conn->state = lpcb; + tcp_accept(lpcb, altcp_tcp_accept); + return conn; + } + return NULL; +} + +static void +altcp_tcp_abort(struct altcp_pcb *conn) +{ + if (conn != NULL) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + if (pcb) { + tcp_abort(pcb); + } + } +} + +static err_t +altcp_tcp_close(struct altcp_pcb *conn) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return ERR_VAL; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + if (pcb) { + err_t err; + tcp_poll_fn oldpoll = pcb->poll; + altcp_tcp_remove_callbacks(pcb); + err = tcp_close(pcb); + if (err != ERR_OK) { + /* not closed, set up all callbacks again */ + altcp_tcp_setup_callbacks(conn, pcb); + /* poll callback is not included in the above */ + tcp_poll(pcb, oldpoll, pcb->pollinterval); + return err; + } + conn->state = NULL; /* unsafe to reference pcb after tcp_close(). */ + } + altcp_free(conn); + return ERR_OK; +} + +static err_t +altcp_tcp_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return ERR_VAL; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + return tcp_shutdown(pcb, shut_rx, shut_tx); +} + +static err_t +altcp_tcp_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return ERR_VAL; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + return tcp_write(pcb, dataptr, len, apiflags); +} + +static err_t +altcp_tcp_output(struct altcp_pcb *conn) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return ERR_VAL; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + return tcp_output(pcb); +} + +static u16_t +altcp_tcp_mss(struct altcp_pcb *conn) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return 0; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + return tcp_mss(pcb); +} + +static u16_t +altcp_tcp_sndbuf(struct altcp_pcb *conn) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return 0; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + return tcp_sndbuf(pcb); +} + +static u16_t +altcp_tcp_sndqueuelen(struct altcp_pcb *conn) +{ + struct tcp_pcb *pcb; + if (conn == NULL) { + return 0; + } + ALTCP_TCP_ASSERT_CONN(conn); + pcb = (struct tcp_pcb *)conn->state; + return tcp_sndqueuelen(pcb); +} + +static void +altcp_tcp_nagle_disable(struct altcp_pcb *conn) +{ + if (conn && conn->state) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + tcp_nagle_disable(pcb); + } +} + +static void +altcp_tcp_nagle_enable(struct altcp_pcb *conn) +{ + if (conn && conn->state) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + tcp_nagle_enable(pcb); + } +} + +static int +altcp_tcp_nagle_disabled(struct altcp_pcb *conn) +{ + if (conn && conn->state) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + return tcp_nagle_disabled(pcb); + } + return 0; +} + +static void +altcp_tcp_setprio(struct altcp_pcb *conn, u8_t prio) +{ + if (conn != NULL) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + tcp_setprio(pcb, prio); + } +} + +#if LWIP_TCP_KEEPALIVE +static void +altcp_tcp_keepalive_disable(struct altcp_pcb *conn) +{ + if (conn && conn->state) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + ip_reset_option(pcb, SOF_KEEPALIVE); + } +} + +static void +altcp_tcp_keepalive_enable(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t cnt) +{ + if (conn && conn->state) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + ip_set_option(pcb, SOF_KEEPALIVE); + pcb->keep_idle = idle ? idle : TCP_KEEPIDLE_DEFAULT; + pcb->keep_intvl = intvl ? intvl : TCP_KEEPINTVL_DEFAULT; + pcb->keep_cnt = cnt ? cnt : TCP_KEEPCNT_DEFAULT; + } +} +#endif + +static void +altcp_tcp_dealloc(struct altcp_pcb *conn) +{ + LWIP_UNUSED_ARG(conn); + ALTCP_TCP_ASSERT_CONN(conn); + /* no private state to clean up */ +} + +static err_t +altcp_tcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port) +{ + if (conn) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + return tcp_tcp_get_tcp_addrinfo(pcb, local, addr, port); + } + return ERR_VAL; +} + +static ip_addr_t * +altcp_tcp_get_ip(struct altcp_pcb *conn, int local) +{ + if (conn) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + if (pcb) { + if (local) { + return &pcb->local_ip; + } else { + return &pcb->remote_ip; + } + } + } + return NULL; +} + +static u16_t +altcp_tcp_get_port(struct altcp_pcb *conn, int local) +{ + if (conn) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + if (pcb) { + if (local) { + return pcb->local_port; + } else { + return pcb->remote_port; + } + } + } + return 0; +} + +#ifdef LWIP_DEBUG +static enum tcp_state +altcp_tcp_dbg_get_tcp_state(struct altcp_pcb *conn) +{ + if (conn) { + struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state; + ALTCP_TCP_ASSERT_CONN(conn); + if (pcb) { + return pcb->state; + } + } + return CLOSED; +} +#endif +const struct altcp_functions altcp_tcp_functions = { + altcp_tcp_set_poll, + altcp_tcp_recved, + altcp_tcp_bind, + altcp_tcp_connect, + altcp_tcp_listen, + altcp_tcp_abort, + altcp_tcp_close, + altcp_tcp_shutdown, + altcp_tcp_write, + altcp_tcp_output, + altcp_tcp_mss, + altcp_tcp_sndbuf, + altcp_tcp_sndqueuelen, + altcp_tcp_nagle_disable, + altcp_tcp_nagle_enable, + altcp_tcp_nagle_disabled, + altcp_tcp_setprio, + altcp_tcp_dealloc, + altcp_tcp_get_tcp_addrinfo, + altcp_tcp_get_ip, + altcp_tcp_get_port +#if LWIP_TCP_KEEPALIVE + , altcp_tcp_keepalive_disable + , altcp_tcp_keepalive_enable +#endif +#ifdef LWIP_DEBUG + , altcp_tcp_dbg_get_tcp_state +#endif +}; + +#endif /* LWIP_ALTCP */ diff --git a/lib/lwip/core/def.c b/lib/lwip/core/def.c new file mode 100644 index 0000000000..282fb41de3 --- /dev/null +++ b/lib/lwip/core/def.c @@ -0,0 +1,263 @@ +/** + * @file + * Common functions used throughout the stack. + * + * These are reference implementations of the byte swapping functions. + * Again with the aim of being simple, correct and fully portable. + * Byte swapping is the second thing you would want to optimize. You will + * need to port it to your architecture and in your cc.h: + * + * #define lwip_htons(x) your_htons + * #define lwip_htonl(x) your_htonl + * + * Note lwip_ntohs() and lwip_ntohl() are merely references to the htonx counterparts. + * + * If you #define them to htons() and htonl(), you should + * #define LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS to prevent lwIP from + * defining htonx/ntohx compatibility macros. + + * @defgroup sys_nonstandard Non-standard functions + * @ingroup sys_layer + * lwIP provides default implementations for non-standard functions. + * These can be mapped to OS functions to reduce code footprint if desired. + * All defines related to this section must not be placed in lwipopts.h, + * but in arch/cc.h! + * These options cannot be #defined in lwipopts.h since they are not options + * of lwIP itself, but options of the lwIP port to your system. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt + * + */ + +#include "lwip/opt.h" +#include "lwip/def.h" + +#include <string.h> + +#if BYTE_ORDER == LITTLE_ENDIAN + +#if !defined(lwip_htons) +/** + * Convert an u16_t from host- to network byte order. + * + * @param n u16_t in host byte order + * @return n in network byte order + */ +u16_t +lwip_htons(u16_t n) +{ + return PP_HTONS(n); +} +#endif /* lwip_htons */ + +#if !defined(lwip_htonl) +/** + * Convert an u32_t from host- to network byte order. + * + * @param n u32_t in host byte order + * @return n in network byte order + */ +u32_t +lwip_htonl(u32_t n) +{ + return PP_HTONL(n); +} +#endif /* lwip_htonl */ + +#endif /* BYTE_ORDER == LITTLE_ENDIAN */ + +#ifndef lwip_strnstr +/** + * @ingroup sys_nonstandard + * lwIP default implementation for strnstr() non-standard function. + * This can be #defined to strnstr() depending on your platform port. + */ +char * +lwip_strnstr(const char *buffer, const char *token, size_t n) +{ + const char *p; + size_t tokenlen = strlen(token); + if (tokenlen == 0) { + return LWIP_CONST_CAST(char *, buffer); + } + for (p = buffer; *p && (p + tokenlen <= buffer + n); p++) { + if ((*p == *token) && (strncmp(p, token, tokenlen) == 0)) { + return LWIP_CONST_CAST(char *, p); + } + } + return NULL; +} +#endif + +#ifndef lwip_strnistr +/** + * @ingroup sys_nonstandard + * lwIP default implementation for strnistr() non-standard function. + * This can be #defined to strnistr() depending on your platform port. + */ +char * +lwip_strnistr(const char *buffer, const char *token, size_t n) +{ + const char *p; + size_t tokenlen = strlen(token); + if (tokenlen == 0) { + return LWIP_CONST_CAST(char *, buffer); + } + for (p = buffer; *p && (p + tokenlen <= buffer + n); p++) { + if (lwip_strnicmp(p, token, tokenlen) == 0) { + return LWIP_CONST_CAST(char *, p); + } + } + return NULL; +} +#endif + +#ifndef lwip_stricmp +/** + * @ingroup sys_nonstandard + * lwIP default implementation for stricmp() non-standard function. + * This can be #defined to stricmp() depending on your platform port. + */ +int +lwip_stricmp(const char *str1, const char *str2) +{ + char c1, c2; + + do { + c1 = *str1++; + c2 = *str2++; + if (c1 != c2) { + char c1_upc = c1 | 0x20; + if ((c1_upc >= 'a') && (c1_upc <= 'z')) { + /* characters are not equal an one is in the alphabet range: + downcase both chars and check again */ + char c2_upc = c2 | 0x20; + if (c1_upc != c2_upc) { + /* still not equal */ + /* don't care for < or > */ + return 1; + } + } else { + /* characters are not equal but none is in the alphabet range */ + return 1; + } + } + } while (c1 != 0); + return 0; +} +#endif + +#ifndef lwip_strnicmp +/** + * @ingroup sys_nonstandard + * lwIP default implementation for strnicmp() non-standard function. + * This can be #defined to strnicmp() depending on your platform port. + */ +int +lwip_strnicmp(const char *str1, const char *str2, size_t len) +{ + char c1, c2; + + do { + c1 = *str1++; + c2 = *str2++; + if (c1 != c2) { + char c1_upc = c1 | 0x20; + if ((c1_upc >= 'a') && (c1_upc <= 'z')) { + /* characters are not equal an one is in the alphabet range: + downcase both chars and check again */ + char c2_upc = c2 | 0x20; + if (c1_upc != c2_upc) { + /* still not equal */ + /* don't care for < or > */ + return 1; + } + } else { + /* characters are not equal but none is in the alphabet range */ + return 1; + } + } + len--; + } while ((len != 0) && (c1 != 0)); + return 0; +} +#endif + +#ifndef lwip_itoa +/** + * @ingroup sys_nonstandard + * lwIP default implementation for itoa() non-standard function. + * This can be #defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform port. + */ +void +lwip_itoa(char *result, size_t bufsize, int number) +{ + char *res = result; + char *tmp = result + bufsize - 1; + int n = (number >= 0) ? number : -number; + + /* handle invalid bufsize */ + if (bufsize < 2) { + if (bufsize == 1) { + *result = 0; + } + return; + } + + /* First, add sign */ + if (number < 0) { + *res++ = '-'; + } + /* Then create the string from the end and stop if buffer full, + and ensure output string is zero terminated */ + *tmp = 0; + while ((n != 0) && (tmp > res)) { + char val = (char)('0' + (n % 10)); + tmp--; + *tmp = val; + n = n / 10; + } + if (n) { + /* buffer is too small */ + *result = 0; + return; + } + if (*tmp == 0) { + /* Nothing added? */ + *res++ = '0'; + *res++ = 0; + return; + } + /* move from temporary buffer to output buffer (sign is not moved) */ + memmove(res, tmp, (size_t)((result + bufsize) - tmp)); +} +#endif diff --git a/lib/lwip/core/dns.c b/lib/lwip/core/dns.c new file mode 100644 index 0000000000..6540f143ba --- /dev/null +++ b/lib/lwip/core/dns.c @@ -0,0 +1,1657 @@ +/** + * @file + * DNS - host name to IP address resolver. + * + * @defgroup dns DNS + * @ingroup callbackstyle_api + * + * Implements a DNS host name to IP address resolver. + * + * The lwIP DNS resolver functions are used to lookup a host name and + * map it to a numerical IP address. It maintains a list of resolved + * hostnames that can be queried with the dns_lookup() function. + * New hostnames can be resolved using the dns_query() function. + * + * The lwIP version of the resolver also adds a non-blocking version of + * gethostbyname() that will work with a raw API application. This function + * checks for an IP address string first and converts it if it is valid. + * gethostbyname() then does a dns_lookup() to see if the name is + * already in the table. If so, the IP is returned. If not, a query is + * issued and the function returns with a ERR_INPROGRESS status. The app + * using the dns client must then go into a waiting state. + * + * Once a hostname has been resolved (or found to be non-existent), + * the resolver code calls a specified callback function (which + * must be implemented by the module that uses the resolver). + * + * Multicast DNS queries are supported for names ending on ".local". + * However, only "One-Shot Multicast DNS Queries" are supported (RFC 6762 + * chapter 5.1), this is not a fully compliant implementation of continuous + * mDNS querying! + * + * All functions must be called from TCPIP thread. + * + * @see DNS_MAX_SERVERS + * @see LWIP_DHCP_MAX_DNS_SERVERS + * @see @ref netconn_common for thread-safe access. + */ + +/* + * Port to lwIP from uIP + * by Jim Pettinato April 2007 + * + * security fixes and more by Simon Goldschmidt + * + * uIP version Copyright (c) 2002-2003, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/*----------------------------------------------------------------------------- + * RFC 1035 - Domain names - implementation and specification + * RFC 2181 - Clarifications to the DNS Specification + *----------------------------------------------------------------------------*/ + +/** @todo: define good default values (rfc compliance) */ +/** @todo: improve answer parsing, more checkings... */ +/** @todo: check RFC1035 - 7.3. Processing responses */ +/** @todo: one-shot mDNS: dual-stack fallback to another IP version */ + +/*----------------------------------------------------------------------------- + * Includes + *----------------------------------------------------------------------------*/ + +#include "lwip/opt.h" + +#if LWIP_DNS /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/def.h" +#include "lwip/udp.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/dns.h" +#include "lwip/prot/dns.h" + +#include <string.h> + +/** Random generator function to create random TXIDs and source ports for queries */ +#ifndef DNS_RAND_TXID +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_XID) != 0) +#define DNS_RAND_TXID LWIP_RAND +#else +static u16_t dns_txid; +#define DNS_RAND_TXID() (++dns_txid) +#endif +#endif + +/** Limits the source port to be >= 1024 by default */ +#ifndef DNS_PORT_ALLOWED +#define DNS_PORT_ALLOWED(port) ((port) >= 1024) +#endif + +/** DNS resource record max. TTL (one week as default) */ +#ifndef DNS_MAX_TTL +#define DNS_MAX_TTL 604800 +#elif DNS_MAX_TTL > 0x7FFFFFFF +#error DNS_MAX_TTL must be a positive 32-bit value +#endif + +#if DNS_TABLE_SIZE > 255 +#error DNS_TABLE_SIZE must fit into an u8_t +#endif +#if DNS_MAX_SERVERS > 255 +#error DNS_MAX_SERVERS must fit into an u8_t +#endif + +/* The number of parallel requests (i.e. calls to dns_gethostbyname + * that cannot be answered from the DNS table. + * This is set to the table size by default. + */ +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING) != 0) +#ifndef DNS_MAX_REQUESTS +#define DNS_MAX_REQUESTS DNS_TABLE_SIZE +#else +#if DNS_MAX_REQUESTS > 255 +#error DNS_MAX_REQUESTS must fit into an u8_t +#endif +#endif +#else +/* In this configuration, both arrays have to have the same size and are used + * like one entry (used/free) */ +#define DNS_MAX_REQUESTS DNS_TABLE_SIZE +#endif + +/* The number of UDP source ports used in parallel */ +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0) +#ifndef DNS_MAX_SOURCE_PORTS +#define DNS_MAX_SOURCE_PORTS DNS_MAX_REQUESTS +#else +#if DNS_MAX_SOURCE_PORTS > 255 +#error DNS_MAX_SOURCE_PORTS must fit into an u8_t +#endif +#endif +#else +#ifdef DNS_MAX_SOURCE_PORTS +#undef DNS_MAX_SOURCE_PORTS +#endif +#define DNS_MAX_SOURCE_PORTS 1 +#endif + +#if LWIP_IPV4 && LWIP_IPV6 +#define LWIP_DNS_ADDRTYPE_IS_IPV6(t) (((t) == LWIP_DNS_ADDRTYPE_IPV6_IPV4) || ((t) == LWIP_DNS_ADDRTYPE_IPV6)) +#define LWIP_DNS_ADDRTYPE_MATCH_IP(t, ip) (IP_IS_V6_VAL(ip) ? LWIP_DNS_ADDRTYPE_IS_IPV6(t) : (!LWIP_DNS_ADDRTYPE_IS_IPV6(t))) +#define LWIP_DNS_ADDRTYPE_ARG(x) , x +#define LWIP_DNS_ADDRTYPE_ARG_OR_ZERO(x) x +#define LWIP_DNS_SET_ADDRTYPE(x, y) do { x = y; } while(0) +#else +#if LWIP_IPV6 +#define LWIP_DNS_ADDRTYPE_IS_IPV6(t) 1 +#else +#define LWIP_DNS_ADDRTYPE_IS_IPV6(t) 0 +#endif +#define LWIP_DNS_ADDRTYPE_MATCH_IP(t, ip) 1 +#define LWIP_DNS_ADDRTYPE_ARG(x) +#define LWIP_DNS_ADDRTYPE_ARG_OR_ZERO(x) 0 +#define LWIP_DNS_SET_ADDRTYPE(x, y) +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + +#if LWIP_DNS_SUPPORT_MDNS_QUERIES +#define LWIP_DNS_ISMDNS_ARG(x) , x +#else +#define LWIP_DNS_ISMDNS_ARG(x) +#endif + +/** DNS query message structure. + No packing needed: only used locally on the stack. */ +struct dns_query { + /* DNS query record starts with either a domain name or a pointer + to a name already present somewhere in the packet. */ + u16_t type; + u16_t cls; +}; +#define SIZEOF_DNS_QUERY 4 + +/** DNS answer message structure. + No packing needed: only used locally on the stack. */ +struct dns_answer { + /* DNS answer record starts with either a domain name or a pointer + to a name already present somewhere in the packet. */ + u16_t type; + u16_t cls; + u32_t ttl; + u16_t len; +}; +#define SIZEOF_DNS_ANSWER 10 +/* maximum allowed size for the struct due to non-packed */ +#define SIZEOF_DNS_ANSWER_ASSERT 12 + +/* DNS table entry states */ +typedef enum { + DNS_STATE_UNUSED = 0, + DNS_STATE_NEW = 1, + DNS_STATE_ASKING = 2, + DNS_STATE_DONE = 3 +} dns_state_enum_t; + +/** DNS table entry */ +struct dns_table_entry { + u32_t ttl; + ip_addr_t ipaddr; + u16_t txid; + u8_t state; + u8_t server_idx; + u8_t tmr; + u8_t retries; + u8_t seqno; +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0) + u8_t pcb_idx; +#endif + char name[DNS_MAX_NAME_LENGTH]; +#if LWIP_IPV4 && LWIP_IPV6 + u8_t reqaddrtype; +#endif /* LWIP_IPV4 && LWIP_IPV6 */ +#if LWIP_DNS_SUPPORT_MDNS_QUERIES + u8_t is_mdns; +#endif +}; + +/** DNS request table entry: used when dns_gehostbyname cannot answer the + * request from the DNS table */ +struct dns_req_entry { + /* pointer to callback on DNS query done */ + dns_found_callback found; + /* argument passed to the callback function */ + void *arg; +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING) != 0) + u8_t dns_table_idx; +#endif +#if LWIP_IPV4 && LWIP_IPV6 + u8_t reqaddrtype; +#endif /* LWIP_IPV4 && LWIP_IPV6 */ +}; + +#if DNS_LOCAL_HOSTLIST + +#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC +/** Local host-list. For hostnames in this list, no + * external name resolution is performed */ +static struct local_hostlist_entry *local_hostlist_dynamic; +#else /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ + +/** Defining this allows the local_hostlist_static to be placed in a different + * linker section (e.g. FLASH) */ +#ifndef DNS_LOCAL_HOSTLIST_STORAGE_PRE +#define DNS_LOCAL_HOSTLIST_STORAGE_PRE static +#endif /* DNS_LOCAL_HOSTLIST_STORAGE_PRE */ +/** Defining this allows the local_hostlist_static to be placed in a different + * linker section (e.g. FLASH) */ +#ifndef DNS_LOCAL_HOSTLIST_STORAGE_POST +#define DNS_LOCAL_HOSTLIST_STORAGE_POST +#endif /* DNS_LOCAL_HOSTLIST_STORAGE_POST */ +DNS_LOCAL_HOSTLIST_STORAGE_PRE struct local_hostlist_entry local_hostlist_static[] + DNS_LOCAL_HOSTLIST_STORAGE_POST = DNS_LOCAL_HOSTLIST_INIT; + +#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ + +static void dns_init_local(void); +static err_t dns_lookup_local(const char *hostname, size_t hostnamelen, ip_addr_t *addr LWIP_DNS_ADDRTYPE_ARG(u8_t dns_addrtype)); +#endif /* DNS_LOCAL_HOSTLIST */ + + +/* forward declarations */ +static void dns_recv(void *s, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port); +static void dns_check_entries(void); +static void dns_call_found(u8_t idx, ip_addr_t *addr); + +/*----------------------------------------------------------------------------- + * Globals + *----------------------------------------------------------------------------*/ + +/* DNS variables */ +static struct udp_pcb *dns_pcbs[DNS_MAX_SOURCE_PORTS]; +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0) +static u8_t dns_last_pcb_idx; +#endif +static u8_t dns_seqno; +static struct dns_table_entry dns_table[DNS_TABLE_SIZE]; +static struct dns_req_entry dns_requests[DNS_MAX_REQUESTS]; +static ip_addr_t dns_servers[DNS_MAX_SERVERS]; + +#if LWIP_IPV4 +const ip_addr_t dns_mquery_v4group = DNS_MQUERY_IPV4_GROUP_INIT; +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 +const ip_addr_t dns_mquery_v6group = DNS_MQUERY_IPV6_GROUP_INIT; +#endif /* LWIP_IPV6 */ + +/** + * Initialize the resolver: set up the UDP pcb and configure the default server + * (if DNS_SERVER_ADDRESS is set). + */ +void +dns_init(void) +{ +#ifdef DNS_SERVER_ADDRESS + /* initialize default DNS server address */ + ip_addr_t dnsserver; + DNS_SERVER_ADDRESS(&dnsserver); + dns_setserver(0, &dnsserver); +#endif /* DNS_SERVER_ADDRESS */ + + LWIP_ASSERT("sanity check SIZEOF_DNS_QUERY", + sizeof(struct dns_query) == SIZEOF_DNS_QUERY); + LWIP_ASSERT("sanity check SIZEOF_DNS_ANSWER", + sizeof(struct dns_answer) <= SIZEOF_DNS_ANSWER_ASSERT); + + LWIP_DEBUGF(DNS_DEBUG, ("dns_init: initializing\n")); + + /* if dns client not yet initialized... */ +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) == 0) + if (dns_pcbs[0] == NULL) { + dns_pcbs[0] = udp_new_ip_type(IPADDR_TYPE_ANY); + LWIP_ASSERT("dns_pcbs[0] != NULL", dns_pcbs[0] != NULL); + + /* initialize DNS table not needed (initialized to zero since it is a + * global variable) */ + LWIP_ASSERT("For implicit initialization to work, DNS_STATE_UNUSED needs to be 0", + DNS_STATE_UNUSED == 0); + + /* initialize DNS client */ + udp_bind(dns_pcbs[0], IP_ANY_TYPE, 0); + udp_recv(dns_pcbs[0], dns_recv, NULL); + } +#endif + +#if DNS_LOCAL_HOSTLIST + dns_init_local(); +#endif +} + +/** + * @ingroup dns + * Initialize one of the DNS servers. + * + * @param numdns the index of the DNS server to set must be < DNS_MAX_SERVERS + * @param dnsserver IP address of the DNS server to set + */ +void +dns_setserver(u8_t numdns, const ip_addr_t *dnsserver) +{ + if (numdns < DNS_MAX_SERVERS) { + if (dnsserver != NULL) { + dns_servers[numdns] = (*dnsserver); + } else { + dns_servers[numdns] = *IP_ADDR_ANY; + } + } +} + +/** + * @ingroup dns + * Obtain one of the currently configured DNS server. + * + * @param numdns the index of the DNS server + * @return IP address of the indexed DNS server or "ip_addr_any" if the DNS + * server has not been configured. + */ +const ip_addr_t * +dns_getserver(u8_t numdns) +{ + if (numdns < DNS_MAX_SERVERS) { + return &dns_servers[numdns]; + } else { + return IP_ADDR_ANY; + } +} + +/** + * The DNS resolver client timer - handle retries and timeouts and should + * be called every DNS_TMR_INTERVAL milliseconds (every second by default). + */ +void +dns_tmr(void) +{ + LWIP_DEBUGF(DNS_DEBUG, ("dns_tmr: dns_check_entries\n")); + dns_check_entries(); +} + +#if DNS_LOCAL_HOSTLIST +static void +dns_init_local(void) +{ +#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC && defined(DNS_LOCAL_HOSTLIST_INIT) + size_t i; + struct local_hostlist_entry *entry; + /* Dynamic: copy entries from DNS_LOCAL_HOSTLIST_INIT to list */ + struct local_hostlist_entry local_hostlist_init[] = DNS_LOCAL_HOSTLIST_INIT; + size_t namelen; + for (i = 0; i < LWIP_ARRAYSIZE(local_hostlist_init); i++) { + struct local_hostlist_entry *init_entry = &local_hostlist_init[i]; + LWIP_ASSERT("invalid host name (NULL)", init_entry->name != NULL); + namelen = strlen(init_entry->name); + LWIP_ASSERT("namelen <= DNS_LOCAL_HOSTLIST_MAX_NAMELEN", namelen <= DNS_LOCAL_HOSTLIST_MAX_NAMELEN); + entry = (struct local_hostlist_entry *)memp_malloc(MEMP_LOCALHOSTLIST); + LWIP_ASSERT("mem-error in dns_init_local", entry != NULL); + if (entry != NULL) { + char *entry_name = (char *)entry + sizeof(struct local_hostlist_entry); + MEMCPY(entry_name, init_entry->name, namelen); + entry_name[namelen] = 0; + entry->name = entry_name; + entry->addr = init_entry->addr; + entry->next = local_hostlist_dynamic; + local_hostlist_dynamic = entry; + } + } +#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC && defined(DNS_LOCAL_HOSTLIST_INIT) */ +} + +/** + * @ingroup dns + * Iterate the local host-list for a hostname. + * + * @param iterator_fn a function that is called for every entry in the local host-list + * @param iterator_arg 3rd argument passed to iterator_fn + * @return the number of entries in the local host-list + */ +size_t +dns_local_iterate(dns_found_callback iterator_fn, void *iterator_arg) +{ + size_t i; +#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC + struct local_hostlist_entry *entry = local_hostlist_dynamic; + i = 0; + while (entry != NULL) { + if (iterator_fn != NULL) { + iterator_fn(entry->name, &entry->addr, iterator_arg); + } + i++; + entry = entry->next; + } +#else /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ + for (i = 0; i < LWIP_ARRAYSIZE(local_hostlist_static); i++) { + if (iterator_fn != NULL) { + iterator_fn(local_hostlist_static[i].name, &local_hostlist_static[i].addr, iterator_arg); + } + } +#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ + return i; +} + +/** + * @ingroup dns + * Scans the local host-list for a hostname. + * + * @param hostname Hostname to look for in the local host-list + * @param addr the first IP address for the hostname in the local host-list or + * IPADDR_NONE if not found. + * @param dns_addrtype - LWIP_DNS_ADDRTYPE_IPV4_IPV6: try to resolve IPv4 (ATTENTION: no fallback here!) + * - LWIP_DNS_ADDRTYPE_IPV6_IPV4: try to resolve IPv6 (ATTENTION: no fallback here!) + * - LWIP_DNS_ADDRTYPE_IPV4: try to resolve IPv4 only + * - LWIP_DNS_ADDRTYPE_IPV6: try to resolve IPv6 only + * @return ERR_OK if found, ERR_ARG if not found + */ +err_t +dns_local_lookup(const char *hostname, ip_addr_t *addr, u8_t dns_addrtype) +{ + size_t hostnamelen; + LWIP_UNUSED_ARG(dns_addrtype); + if ((addr == NULL) || + (!hostname) || (!hostname[0])) { + return ERR_ARG; + } + hostnamelen = strlen(hostname); + if (hostname[hostnamelen - 1] == '.') { + hostnamelen--; + } + if (hostnamelen >= DNS_MAX_NAME_LENGTH) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_local_lookup: name too long to resolve\n")); + return ERR_ARG; + } + return dns_lookup_local(hostname, hostnamelen, addr LWIP_DNS_ADDRTYPE_ARG(dns_addrtype)); +} + +/* Internal implementation for dns_local_lookup and dns_lookup */ +static err_t +dns_lookup_local(const char *hostname, size_t hostnamelen, ip_addr_t *addr LWIP_DNS_ADDRTYPE_ARG(u8_t dns_addrtype)) +{ +#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC + struct local_hostlist_entry *entry = local_hostlist_dynamic; + while (entry != NULL) { + if ((lwip_strnicmp(entry->name, hostname, hostnamelen) == 0) && + !entry->name[hostnamelen] && + LWIP_DNS_ADDRTYPE_MATCH_IP(dns_addrtype, entry->addr)) { + if (addr) { + ip_addr_copy(*addr, entry->addr); + } + return ERR_OK; + } + entry = entry->next; + } +#else /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ + size_t i; + for (i = 0; i < LWIP_ARRAYSIZE(local_hostlist_static); i++) { + if ((lwip_strnicmp(local_hostlist_static[i].name, hostname, hostnamelen) == 0) && + !local_hostlist_static[i].name[hostnamelen] && + LWIP_DNS_ADDRTYPE_MATCH_IP(dns_addrtype, local_hostlist_static[i].addr)) { + if (addr) { + ip_addr_copy(*addr, local_hostlist_static[i].addr); + } + return ERR_OK; + } + } +#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ + return ERR_ARG; +} + +#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC +/** + * @ingroup dns + * Remove all entries from the local host-list for a specific hostname + * and/or IP address + * + * @param hostname hostname for which entries shall be removed from the local + * host-list + * @param addr address for which entries shall be removed from the local host-list + * @return the number of removed entries + */ +int +dns_local_removehost(const char *hostname, const ip_addr_t *addr) +{ + int removed = 0; + struct local_hostlist_entry *entry = local_hostlist_dynamic; + struct local_hostlist_entry *last_entry = NULL; + while (entry != NULL) { + if (((hostname == NULL) || !lwip_stricmp(entry->name, hostname)) && + ((addr == NULL) || ip_addr_eq(&entry->addr, addr))) { + struct local_hostlist_entry *free_entry; + if (last_entry != NULL) { + last_entry->next = entry->next; + } else { + local_hostlist_dynamic = entry->next; + } + free_entry = entry; + entry = entry->next; + memp_free(MEMP_LOCALHOSTLIST, free_entry); + removed++; + } else { + last_entry = entry; + entry = entry->next; + } + } + return removed; +} + +/** + * @ingroup dns + * Add a hostname/IP address pair to the local host-list. + * Duplicates are not checked. + * + * @param hostname hostname of the new entry + * @param addr IP address of the new entry + * @return ERR_OK if succeeded or ERR_MEM on memory error + */ +err_t +dns_local_addhost(const char *hostname, const ip_addr_t *addr) +{ + struct local_hostlist_entry *entry; + size_t namelen; + char *entry_name; + LWIP_ASSERT("invalid host name (NULL)", hostname != NULL); + namelen = strlen(hostname); + LWIP_ASSERT("namelen <= DNS_LOCAL_HOSTLIST_MAX_NAMELEN", namelen <= DNS_LOCAL_HOSTLIST_MAX_NAMELEN); + entry = (struct local_hostlist_entry *)memp_malloc(MEMP_LOCALHOSTLIST); + if (entry == NULL) { + return ERR_MEM; + } + entry_name = (char *)entry + sizeof(struct local_hostlist_entry); + MEMCPY(entry_name, hostname, namelen); + entry_name[namelen] = 0; + entry->name = entry_name; + ip_addr_copy(entry->addr, *addr); + entry->next = local_hostlist_dynamic; + local_hostlist_dynamic = entry; + return ERR_OK; +} +#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC*/ +#endif /* DNS_LOCAL_HOSTLIST */ + +/** + * @ingroup dns + * Look up a hostname in the array of known hostnames. + * + * @note This function only looks in the internal array of known + * hostnames, it does not send out a query for the hostname if none + * was found. The function dns_enqueue() can be used to send a query + * for a hostname. + * + * @param name the hostname to look up + * @param hostnamelen length of the hostname + * @param addr the hostname's IP address, as u32_t (instead of ip_addr_t to + * better check for failure: != IPADDR_NONE) or IPADDR_NONE if the hostname + * was not found in the cached dns_table. + * @return ERR_OK if found, ERR_ARG if not found + */ +static err_t +dns_lookup(const char *name, size_t hostnamelen, ip_addr_t *addr LWIP_DNS_ADDRTYPE_ARG(u8_t dns_addrtype)) +{ + size_t namelen; + u8_t i; +#if DNS_LOCAL_HOSTLIST + if (dns_lookup_local(name, hostnamelen, addr LWIP_DNS_ADDRTYPE_ARG(dns_addrtype)) == ERR_OK) { + return ERR_OK; + } +#endif /* DNS_LOCAL_HOSTLIST */ +#ifdef DNS_LOOKUP_LOCAL_EXTERN + if (DNS_LOOKUP_LOCAL_EXTERN(name, hostnamelen, addr, LWIP_DNS_ADDRTYPE_ARG_OR_ZERO(dns_addrtype)) == ERR_OK) { + return ERR_OK; + } +#endif /* DNS_LOOKUP_LOCAL_EXTERN */ + + namelen = LWIP_MIN(hostnamelen, DNS_MAX_NAME_LENGTH - 1); + /* Walk through name list, return entry if found. If not, return NULL. */ + for (i = 0; i < DNS_TABLE_SIZE; ++i) { + if ((dns_table[i].state == DNS_STATE_DONE) && + (lwip_strnicmp(name, dns_table[i].name, namelen) == 0) && + !dns_table[i].name[namelen] && + LWIP_DNS_ADDRTYPE_MATCH_IP(dns_addrtype, dns_table[i].ipaddr)) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_lookup: "%s": found = ", name)); + ip_addr_debug_print_val(DNS_DEBUG, dns_table[i].ipaddr); + LWIP_DEBUGF(DNS_DEBUG, ("\n")); + if (addr) { + ip_addr_copy(*addr, dns_table[i].ipaddr); + } + return ERR_OK; + } + } + + return ERR_ARG; +} + +/** + * Compare the "dotted" name "query" with the encoded name "response" + * to make sure an answer from the DNS server matches the current dns_table + * entry (otherwise, answers might arrive late for hostname not on the list + * any more). + * + * For now, this function compares case-insensitive to cope with all kinds of + * servers. This also means that "dns 0x20 bit encoding" must be checked + * externally, if we want to implement it. + * Currently, the request is sent exactly as passed in by he user request. + * + * @param query hostname (not encoded) from the dns_table + * @param p pbuf containing the encoded hostname in the DNS response + * @param start_offset offset into p where the name starts + * @return 0xFFFF: names differ, other: names equal -> offset behind name + */ +static u16_t +dns_compare_name(const char *query, struct pbuf *p, u16_t start_offset) +{ + int n; + u16_t response_offset = start_offset; + + do { + n = pbuf_try_get_at(p, response_offset); + if ((n < 0) || (response_offset == 0xFFFF)) { + /* error or overflow */ + return 0xFFFF; + } + response_offset++; + /** @see RFC 1035 - 4.1.4. Message compression */ + if ((n & 0xc0) == 0xc0) { + /* Compressed name: cannot be equal since we don't send them */ + return 0xFFFF; + } else { + /* Not compressed name */ + while (n > 0) { + int c = pbuf_try_get_at(p, response_offset); + if (c < 0) { + return 0xFFFF; + } + if (lwip_tolower((*query)) != lwip_tolower((u8_t)c)) { + return 0xFFFF; + } + if (response_offset == 0xFFFF) { + /* would overflow */ + return 0xFFFF; + } + response_offset++; + ++query; + --n; + } + ++query; + } + n = pbuf_try_get_at(p, response_offset); + if (n < 0) { + return 0xFFFF; + } + } while (n != 0); + + if (response_offset == 0xFFFF) { + /* would overflow */ + return 0xFFFF; + } + return (u16_t)(response_offset + 1); +} + +/** + * Walk through a compact encoded DNS name and return the end of the name. + * + * @param p pbuf containing the name + * @param query_idx start index into p pointing to encoded DNS name in the DNS server response + * @return index to end of the name + */ +static u16_t +dns_skip_name(struct pbuf *p, u16_t query_idx) +{ + int n; + u16_t offset = query_idx; + + do { + n = pbuf_try_get_at(p, offset++); + if ((n < 0) || (offset == 0)) { + return 0xFFFF; + } + /** @see RFC 1035 - 4.1.4. Message compression */ + if ((n & 0xc0) == 0xc0) { + /* Compressed name: since we only want to skip it (not check it), stop here */ + break; + } else { + /* Not compressed name */ + if (offset + n >= p->tot_len) { + return 0xFFFF; + } + offset = (u16_t)(offset + n); + } + n = pbuf_try_get_at(p, offset); + if (n < 0) { + return 0xFFFF; + } + } while (n != 0); + + if (offset == 0xFFFF) { + return 0xFFFF; + } + return (u16_t)(offset + 1); +} + +/** + * Send a DNS query packet. + * + * @param idx the DNS table entry index for which to send a request + * @return ERR_OK if packet is sent; an err_t indicating the problem otherwise + */ +static err_t +dns_send(u8_t idx) +{ + err_t err; + struct dns_hdr hdr; + struct dns_query qry; + struct pbuf *p; + u16_t query_idx, copy_len; + const char *hostname, *hostname_part; + u8_t n; + u8_t pcb_idx; + struct dns_table_entry *entry = &dns_table[idx]; + + LWIP_DEBUGF(DNS_DEBUG, ("dns_send: dns_servers[%"U16_F"] "%s": request\n", + (u16_t)(entry->server_idx), entry->name)); + LWIP_ASSERT("dns server out of array", entry->server_idx < DNS_MAX_SERVERS); + if (ip_addr_isany_val(dns_servers[entry->server_idx]) +#if LWIP_DNS_SUPPORT_MDNS_QUERIES + && !entry->is_mdns +#endif + ) { + /* DNS server not valid anymore, e.g. PPP netif has been shut down */ + /* call specified callback function if provided */ + dns_call_found(idx, NULL); + /* flush this entry */ + entry->state = DNS_STATE_UNUSED; + return ERR_OK; + } + + /* if here, we have either a new query or a retry on a previous query to process */ + p = pbuf_alloc(PBUF_TRANSPORT, (u16_t)(SIZEOF_DNS_HDR + strlen(entry->name) + 2 + + SIZEOF_DNS_QUERY), PBUF_RAM); + if (p != NULL) { + const ip_addr_t *dst; + u16_t dst_port; + /* fill dns header */ + memset(&hdr, 0, SIZEOF_DNS_HDR); + hdr.id = lwip_htons(entry->txid); + hdr.flags1 = DNS_FLAG1_RD; + hdr.numquestions = PP_HTONS(1); + pbuf_take(p, &hdr, SIZEOF_DNS_HDR); + hostname = entry->name; + --hostname; + + /* convert hostname into suitable query format. */ + query_idx = SIZEOF_DNS_HDR; + do { + ++hostname; + hostname_part = hostname; + for (n = 0; *hostname != '.' && *hostname != 0; ++hostname) { + ++n; + } + copy_len = (u16_t)(hostname - hostname_part); + if (query_idx + n + 1 > 0xFFFF) { + /* u16_t overflow */ + goto overflow_return; + } + pbuf_put_at(p, query_idx, n); + pbuf_take_at(p, hostname_part, copy_len, (u16_t)(query_idx + 1)); + query_idx = (u16_t)(query_idx + n + 1); + } while (*hostname != 0); + pbuf_put_at(p, query_idx, 0); + query_idx++; + + /* fill dns query */ + if (LWIP_DNS_ADDRTYPE_IS_IPV6(entry->reqaddrtype)) { + qry.type = PP_HTONS(DNS_RRTYPE_AAAA); + } else { + qry.type = PP_HTONS(DNS_RRTYPE_A); + } + qry.cls = PP_HTONS(DNS_RRCLASS_IN); + pbuf_take_at(p, &qry, SIZEOF_DNS_QUERY, query_idx); + +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0) + pcb_idx = entry->pcb_idx; +#else + pcb_idx = 0; +#endif + /* send dns packet */ + LWIP_DEBUGF(DNS_DEBUG, ("sending DNS request ID %d for name "%s" to server %d\r\n", + entry->txid, entry->name, entry->server_idx)); +#if LWIP_DNS_SUPPORT_MDNS_QUERIES + if (entry->is_mdns) { + dst_port = DNS_MQUERY_PORT; +#if LWIP_IPV6 + if (LWIP_DNS_ADDRTYPE_IS_IPV6(entry->reqaddrtype)) { + dst = &dns_mquery_v6group; + } +#endif +#if LWIP_IPV4 && LWIP_IPV6 + else +#endif +#if LWIP_IPV4 + { + dst = &dns_mquery_v4group; + } +#endif + } else +#endif /* LWIP_DNS_SUPPORT_MDNS_QUERIES */ + { + dst_port = DNS_SERVER_PORT; + dst = &dns_servers[entry->server_idx]; + } + err = udp_sendto(dns_pcbs[pcb_idx], p, dst, dst_port); + + /* free pbuf */ + pbuf_free(p); + } else { + err = ERR_MEM; + } + + return err; +overflow_return: + pbuf_free(p); + return ERR_VAL; +} + +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0) +static struct udp_pcb * +dns_alloc_random_port(void) +{ + err_t err; + struct udp_pcb *pcb; + + pcb = udp_new_ip_type(IPADDR_TYPE_ANY); + if (pcb == NULL) { + /* out of memory, have to reuse an existing pcb */ + return NULL; + } + do { + u16_t port = (u16_t)DNS_RAND_TXID(); + if (DNS_PORT_ALLOWED(port)) { + err = udp_bind(pcb, IP_ANY_TYPE, port); + } else { + /* this port is not allowed, try again */ + err = ERR_USE; + } + } while (err == ERR_USE); + if (err != ERR_OK) { + udp_remove(pcb); + return NULL; + } + udp_recv(pcb, dns_recv, NULL); + return pcb; +} + +/** + * dns_alloc_pcb() - allocates a new pcb (or reuses an existing one) to be used + * for sending a request + * + * @return an index into dns_pcbs + */ +static u8_t +dns_alloc_pcb(void) +{ + u8_t i; + u8_t idx; + + for (i = 0; i < DNS_MAX_SOURCE_PORTS; i++) { + if (dns_pcbs[i] == NULL) { + break; + } + } + if (i < DNS_MAX_SOURCE_PORTS) { + dns_pcbs[i] = dns_alloc_random_port(); + if (dns_pcbs[i] != NULL) { + /* succeeded */ + dns_last_pcb_idx = i; + return i; + } + } + /* if we come here, creating a new UDP pcb failed, so we have to use + an already existing one (so overflow is no issue) */ + for (i = 0, idx = (u8_t)(dns_last_pcb_idx + 1); i < DNS_MAX_SOURCE_PORTS; i++, idx++) { + if (idx >= DNS_MAX_SOURCE_PORTS) { + idx = 0; + } + if (dns_pcbs[idx] != NULL) { + dns_last_pcb_idx = idx; + return idx; + } + } + return DNS_MAX_SOURCE_PORTS; +} +#endif /* ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0) */ + +/** + * dns_call_found() - call the found callback and check if there are duplicate + * entries for the given hostname. If there are any, their found callback will + * be called and they will be removed. + * + * @param idx dns table index of the entry that is resolved or removed + * @param addr IP address for the hostname (or NULL on error or memory shortage) + */ +static void +dns_call_found(u8_t idx, ip_addr_t *addr) +{ +#if ((LWIP_DNS_SECURE & (LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING | LWIP_DNS_SECURE_RAND_SRC_PORT)) != 0) + u8_t i; +#endif + +#if LWIP_IPV4 && LWIP_IPV6 + if (addr != NULL) { + /* check that address type matches the request and adapt the table entry */ + if (IP_IS_V6_VAL(*addr)) { + LWIP_ASSERT("invalid response", LWIP_DNS_ADDRTYPE_IS_IPV6(dns_table[idx].reqaddrtype)); + dns_table[idx].reqaddrtype = LWIP_DNS_ADDRTYPE_IPV6; + } else { + LWIP_ASSERT("invalid response", !LWIP_DNS_ADDRTYPE_IS_IPV6(dns_table[idx].reqaddrtype)); + dns_table[idx].reqaddrtype = LWIP_DNS_ADDRTYPE_IPV4; + } + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING) != 0) + for (i = 0; i < DNS_MAX_REQUESTS; i++) { + if (dns_requests[i].found && (dns_requests[i].dns_table_idx == idx)) { + (*dns_requests[i].found)(dns_table[idx].name, addr, dns_requests[i].arg); + /* flush this entry */ + dns_requests[i].found = NULL; + } + } +#else + if (dns_requests[idx].found) { + (*dns_requests[idx].found)(dns_table[idx].name, addr, dns_requests[idx].arg); + } + dns_requests[idx].found = NULL; +#endif +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0) + /* close the pcb used unless other request are using it */ + for (i = 0; i < DNS_MAX_REQUESTS; i++) { + if (i == idx) { + continue; /* only check other requests */ + } + if (dns_table[i].state == DNS_STATE_ASKING) { + if (dns_table[i].pcb_idx == dns_table[idx].pcb_idx) { + /* another request is still using the same pcb */ + dns_table[idx].pcb_idx = DNS_MAX_SOURCE_PORTS; + break; + } + } + } + if (dns_table[idx].pcb_idx < DNS_MAX_SOURCE_PORTS) { + /* if we come here, the pcb is not used any more and can be removed */ + udp_remove(dns_pcbs[dns_table[idx].pcb_idx]); + dns_pcbs[dns_table[idx].pcb_idx] = NULL; + dns_table[idx].pcb_idx = DNS_MAX_SOURCE_PORTS; + } +#endif +} + +/* Create a query transmission ID that is unique for all outstanding queries */ +static u16_t +dns_create_txid(void) +{ + u16_t txid; + u8_t i; + +again: + txid = (u16_t)DNS_RAND_TXID(); + + /* check whether the ID is unique */ + for (i = 0; i < DNS_TABLE_SIZE; i++) { + if ((dns_table[i].state == DNS_STATE_ASKING) && + (dns_table[i].txid == txid)) { + /* ID already used by another pending query */ + goto again; + } + } + + return txid; +} + +/** + * Check whether there are other backup DNS servers available to try + */ +static u8_t +dns_backupserver_available(struct dns_table_entry *pentry) +{ + u8_t ret = 0; + + if (pentry) { + if ((pentry->server_idx + 1 < DNS_MAX_SERVERS) && !ip_addr_isany_val(dns_servers[pentry->server_idx + 1])) { + ret = 1; + } + } + + return ret; +} + +/** + * dns_check_entry() - see if entry has not yet been queried and, if so, sends out a query. + * Check an entry in the dns_table: + * - send out query for new entries + * - retry old pending entries on timeout (also with different servers) + * - remove completed entries from the table if their TTL has expired + * + * @param i index of the dns_table entry to check + */ +static void +dns_check_entry(u8_t i) +{ + err_t err; + struct dns_table_entry *entry = &dns_table[i]; + + LWIP_ASSERT("array index out of bounds", i < DNS_TABLE_SIZE); + + switch (entry->state) { + case DNS_STATE_NEW: + /* initialize new entry */ + entry->txid = dns_create_txid(); + entry->state = DNS_STATE_ASKING; + entry->server_idx = 0; + entry->tmr = 1; + entry->retries = 0; + + /* send DNS packet for this entry */ + err = dns_send(i); + if (err != ERR_OK) { + LWIP_DEBUGF(DNS_DEBUG | LWIP_DBG_LEVEL_WARNING, + ("dns_send returned error: %s\n", lwip_strerr(err))); + } + break; + case DNS_STATE_ASKING: + if (--entry->tmr == 0) { + if (++entry->retries == DNS_MAX_RETRIES) { + if (dns_backupserver_available(entry) +#if LWIP_DNS_SUPPORT_MDNS_QUERIES + && !entry->is_mdns +#endif /* LWIP_DNS_SUPPORT_MDNS_QUERIES */ + ) { + /* change of server */ + entry->server_idx++; + entry->tmr = 1; + entry->retries = 0; + } else { + LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entry: "%s": timeout\n", entry->name)); + /* call specified callback function if provided */ + dns_call_found(i, NULL); + /* flush this entry */ + entry->state = DNS_STATE_UNUSED; + break; + } + } else { + /* wait longer for the next retry */ + entry->tmr = entry->retries; + } + + /* send DNS packet for this entry */ + err = dns_send(i); + if (err != ERR_OK) { + LWIP_DEBUGF(DNS_DEBUG | LWIP_DBG_LEVEL_WARNING, + ("dns_send returned error: %s\n", lwip_strerr(err))); + } + } + break; + case DNS_STATE_DONE: + /* if the time to live is nul */ + if ((entry->ttl == 0) || (--entry->ttl == 0)) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entry: "%s": flush\n", entry->name)); + /* flush this entry, there cannot be any related pending entries in this state */ + entry->state = DNS_STATE_UNUSED; + } + break; + case DNS_STATE_UNUSED: + /* nothing to do */ + break; + default: + LWIP_ASSERT("unknown dns_table entry state:", 0); + break; + } +} + +/** + * Call dns_check_entry for each entry in dns_table - check all entries. + */ +static void +dns_check_entries(void) +{ + u8_t i; + + for (i = 0; i < DNS_TABLE_SIZE; ++i) { + dns_check_entry(i); + } +} + +/** + * Save TTL and call dns_call_found for correct response. + */ +static void +dns_correct_response(u8_t idx, u32_t ttl) +{ + struct dns_table_entry *entry = &dns_table[idx]; + + entry->state = DNS_STATE_DONE; + + LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: "%s": response = ", entry->name)); + ip_addr_debug_print_val(DNS_DEBUG, entry->ipaddr); + LWIP_DEBUGF(DNS_DEBUG, ("\n")); + + /* read the answer resource record's TTL, and maximize it if needed */ + entry->ttl = ttl; + if (entry->ttl > DNS_MAX_TTL) { + entry->ttl = DNS_MAX_TTL; + } + dns_call_found(idx, &entry->ipaddr); + + if (entry->ttl == 0) { + /* RFC 883, page 29: "Zero values are + interpreted to mean that the RR can only be used for the + transaction in progress, and should not be cached." + -> flush this entry now */ + /* entry reused during callback? */ + if (entry->state == DNS_STATE_DONE) { + entry->state = DNS_STATE_UNUSED; + } + } +} + +/** + * Receive input function for DNS response packets arriving for the dns UDP pcb. + */ +static void +dns_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) +{ + u8_t i; + u16_t txid; + u16_t res_idx; + struct dns_hdr hdr; + struct dns_answer ans; + struct dns_query qry; + u16_t nquestions, nanswers; + + LWIP_UNUSED_ARG(arg); + LWIP_UNUSED_ARG(pcb); + LWIP_UNUSED_ARG(port); + + /* is the dns message big enough ? */ + if (p->tot_len < (SIZEOF_DNS_HDR + SIZEOF_DNS_QUERY)) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: pbuf too small\n")); + /* free pbuf and return */ + goto ignore_packet; + } + + /* copy dns payload inside static buffer for processing */ + if (pbuf_copy_partial(p, &hdr, SIZEOF_DNS_HDR, 0) == SIZEOF_DNS_HDR) { + /* Match the ID in the DNS header with the name table. */ + txid = lwip_htons(hdr.id); + for (i = 0; i < DNS_TABLE_SIZE; i++) { + struct dns_table_entry *entry = &dns_table[i]; + if ((entry->state == DNS_STATE_ASKING) && + (entry->txid == txid)) { + + /* We only care about the question(s) and the answers. The authrr + and the extrarr are simply discarded. */ + nquestions = lwip_htons(hdr.numquestions); + nanswers = lwip_htons(hdr.numanswers); + + /* Check for correct response. */ + if ((hdr.flags1 & DNS_FLAG1_RESPONSE) == 0) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: "%s": not a response\n", entry->name)); + goto ignore_packet; /* ignore this packet */ + } + if (nquestions != 1) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: "%s": response not match to query\n", entry->name)); + goto ignore_packet; /* ignore this packet */ + } + +#if LWIP_DNS_SUPPORT_MDNS_QUERIES + if (!entry->is_mdns) +#endif /* LWIP_DNS_SUPPORT_MDNS_QUERIES */ + { + /* Check whether response comes from the same network address to which the + question was sent. (RFC 5452) */ + if (!ip_addr_eq(addr, &dns_servers[entry->server_idx])) { + goto ignore_packet; /* ignore this packet */ + } + } + + /* Check if the name in the "question" part match with the name in the entry and + skip it if equal. */ + res_idx = dns_compare_name(entry->name, p, SIZEOF_DNS_HDR); + if (res_idx == 0xFFFF) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: "%s": response not match to query\n", entry->name)); + goto ignore_packet; /* ignore this packet */ + } + + /* check if "question" part matches the request */ + if (pbuf_copy_partial(p, &qry, SIZEOF_DNS_QUERY, res_idx) != SIZEOF_DNS_QUERY) { + goto ignore_packet; /* ignore this packet */ + } + if ((qry.cls != PP_HTONS(DNS_RRCLASS_IN)) || + (LWIP_DNS_ADDRTYPE_IS_IPV6(entry->reqaddrtype) && (qry.type != PP_HTONS(DNS_RRTYPE_AAAA))) || + (!LWIP_DNS_ADDRTYPE_IS_IPV6(entry->reqaddrtype) && (qry.type != PP_HTONS(DNS_RRTYPE_A)))) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: "%s": response not match to query\n", entry->name)); + goto ignore_packet; /* ignore this packet */ + } + /* skip the rest of the "question" part */ + if (res_idx + SIZEOF_DNS_QUERY > 0xFFFF) { + goto ignore_packet; + } + res_idx = (u16_t)(res_idx + SIZEOF_DNS_QUERY); + + /* Check for error. If so, call callback to inform. */ + if (hdr.flags2 & DNS_FLAG2_ERR_MASK) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: "%s": error in flags\n", entry->name)); + + /* if there is another backup DNS server to try + * then don't stop the DNS request + */ + if (dns_backupserver_available(entry)) { + /* avoid retrying the same server */ + entry->retries = DNS_MAX_RETRIES-1; + entry->tmr = 1; + + /* contact next available server for this entry */ + dns_check_entry(i); + + goto ignore_packet; + } + } else { + while ((nanswers > 0) && (res_idx < p->tot_len)) { + /* skip answer resource record's host name */ + res_idx = dns_skip_name(p, res_idx); + if (res_idx == 0xFFFF) { + goto ignore_packet; /* ignore this packet */ + } + + /* Check for IP address type and Internet class. Others are discarded. */ + if (pbuf_copy_partial(p, &ans, SIZEOF_DNS_ANSWER, res_idx) != SIZEOF_DNS_ANSWER) { + goto ignore_packet; /* ignore this packet */ + } + if (res_idx + SIZEOF_DNS_ANSWER > 0xFFFF) { + goto ignore_packet; + } + res_idx = (u16_t)(res_idx + SIZEOF_DNS_ANSWER); + + if (ans.cls == PP_HTONS(DNS_RRCLASS_IN)) { +#if LWIP_IPV4 + if ((ans.type == PP_HTONS(DNS_RRTYPE_A)) && (ans.len == PP_HTONS(sizeof(ip4_addr_t)))) { +#if LWIP_IPV4 && LWIP_IPV6 + if (!LWIP_DNS_ADDRTYPE_IS_IPV6(entry->reqaddrtype)) +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + { + ip4_addr_t ip4addr; + /* read the IP address after answer resource record's header */ + if (pbuf_copy_partial(p, &ip4addr, sizeof(ip4_addr_t), res_idx) != sizeof(ip4_addr_t)) { + goto ignore_packet; /* ignore this packet */ + } + ip_addr_copy_from_ip4(dns_table[i].ipaddr, ip4addr); + pbuf_free(p); + /* handle correct response */ + dns_correct_response(i, lwip_ntohl(ans.ttl)); + return; + } + } +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 + if ((ans.type == PP_HTONS(DNS_RRTYPE_AAAA)) && (ans.len == PP_HTONS(sizeof(ip6_addr_p_t)))) { +#if LWIP_IPV4 && LWIP_IPV6 + if (LWIP_DNS_ADDRTYPE_IS_IPV6(entry->reqaddrtype)) +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + { + ip6_addr_p_t ip6addr; + /* read the IP address after answer resource record's header */ + if (pbuf_copy_partial(p, &ip6addr, sizeof(ip6_addr_p_t), res_idx) != sizeof(ip6_addr_p_t)) { + goto ignore_packet; /* ignore this packet */ + } + /* @todo: scope ip6addr? Might be required for link-local addresses at least? */ + ip_addr_copy_from_ip6_packed(dns_table[i].ipaddr, ip6addr); + pbuf_free(p); + /* handle correct response */ + dns_correct_response(i, lwip_ntohl(ans.ttl)); + return; + } + } +#endif /* LWIP_IPV6 */ + } + /* skip this answer */ + if ((int)(res_idx + lwip_htons(ans.len)) > 0xFFFF) { + goto ignore_packet; /* ignore this packet */ + } + res_idx = (u16_t)(res_idx + lwip_htons(ans.len)); + --nanswers; + } +#if LWIP_IPV4 && LWIP_IPV6 + if ((entry->reqaddrtype == LWIP_DNS_ADDRTYPE_IPV4_IPV6) || + (entry->reqaddrtype == LWIP_DNS_ADDRTYPE_IPV6_IPV4)) { + if (entry->reqaddrtype == LWIP_DNS_ADDRTYPE_IPV4_IPV6) { + /* IPv4 failed, try IPv6 */ + dns_table[i].reqaddrtype = LWIP_DNS_ADDRTYPE_IPV6; + } else { + /* IPv6 failed, try IPv4 */ + dns_table[i].reqaddrtype = LWIP_DNS_ADDRTYPE_IPV4; + } + pbuf_free(p); + dns_table[i].state = DNS_STATE_NEW; + dns_check_entry(i); + return; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: "%s": error in response\n", entry->name)); + } + /* call callback to indicate error, clean up memory and return */ + pbuf_free(p); + dns_call_found(i, NULL); + dns_table[i].state = DNS_STATE_UNUSED; + return; + } + } + } + +ignore_packet: + /* deallocate memory and return */ + pbuf_free(p); + return; +} + +/** + * Queues a new hostname to resolve and sends out a DNS query for that hostname + * + * @param name the hostname that is to be queried + * @param hostnamelen length of the hostname + * @param found a callback function to be called on success, failure or timeout + * @param callback_arg argument to pass to the callback function + * @return err_t return code. + */ +static err_t +dns_enqueue(const char *name, size_t hostnamelen, dns_found_callback found, + void *callback_arg LWIP_DNS_ADDRTYPE_ARG(u8_t dns_addrtype) LWIP_DNS_ISMDNS_ARG(u8_t is_mdns)) +{ + u8_t i; + u8_t lseq, lseqi; + struct dns_table_entry *entry = NULL; + size_t namelen; + struct dns_req_entry *req; +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING) != 0) + u8_t r; +#endif + + namelen = LWIP_MIN(hostnamelen, DNS_MAX_NAME_LENGTH - 1); + +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING) != 0) + /* check for duplicate entries */ + for (i = 0; i < DNS_TABLE_SIZE; i++) { + if ((dns_table[i].state == DNS_STATE_ASKING) && + (lwip_strnicmp(name, dns_table[i].name, namelen) == 0) && + !dns_table[i].name[namelen]) { +#if LWIP_IPV4 && LWIP_IPV6 + if (dns_table[i].reqaddrtype != dns_addrtype) { + /* requested address types don't match + this can lead to 2 concurrent requests, but mixing the address types + for the same host should not be that common */ + continue; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + /* this is a duplicate entry, find a free request entry */ + for (r = 0; r < DNS_MAX_REQUESTS; r++) { + if (dns_requests[r].found == NULL) { + dns_requests[r].found = found; + dns_requests[r].arg = callback_arg; + dns_requests[r].dns_table_idx = i; + LWIP_DNS_SET_ADDRTYPE(dns_requests[r].reqaddrtype, dns_addrtype); + LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: "%s": duplicate request\n", name)); + return ERR_INPROGRESS; + } + } + } + } + /* no duplicate entries found */ +#endif + + /* search an unused entry, or the oldest one */ + lseq = 0; + lseqi = DNS_TABLE_SIZE; + for (i = 0; i < DNS_TABLE_SIZE; ++i) { + entry = &dns_table[i]; + /* is it an unused entry ? */ + if (entry->state == DNS_STATE_UNUSED) { + break; + } + /* check if this is the oldest completed entry */ + if (entry->state == DNS_STATE_DONE) { + u8_t age = (u8_t)(dns_seqno - entry->seqno); + if (age > lseq) { + lseq = age; + lseqi = i; + } + } + } + + /* if we don't have found an unused entry, use the oldest completed one */ + if (i == DNS_TABLE_SIZE) { + if ((lseqi >= DNS_TABLE_SIZE) || (dns_table[lseqi].state != DNS_STATE_DONE)) { + /* no entry can be used now, table is full */ + LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: "%s": DNS entries table is full\n", name)); + return ERR_MEM; + } else { + /* use the oldest completed one */ + i = lseqi; + entry = &dns_table[i]; + } + } + +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING) != 0) + /* find a free request entry */ + req = NULL; + for (r = 0; r < DNS_MAX_REQUESTS; r++) { + if (dns_requests[r].found == NULL) { + req = &dns_requests[r]; + break; + } + } + if (req == NULL) { + /* no request entry can be used now, table is full */ + LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: "%s": DNS request entries table is full\n", name)); + return ERR_MEM; + } + req->dns_table_idx = i; +#else + /* in this configuration, the entry index is the same as the request index */ + req = &dns_requests[i]; +#endif + + /* use this entry */ + LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: "%s": use DNS entry %"U16_F"\n", name, (u16_t)(i))); + + /* fill the entry */ + entry->state = DNS_STATE_NEW; + entry->seqno = dns_seqno; + LWIP_DNS_SET_ADDRTYPE(entry->reqaddrtype, dns_addrtype); + LWIP_DNS_SET_ADDRTYPE(req->reqaddrtype, dns_addrtype); + req->found = found; + req->arg = callback_arg; + MEMCPY(entry->name, name, namelen); + entry->name[namelen] = 0; + +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0) + entry->pcb_idx = dns_alloc_pcb(); + if (entry->pcb_idx >= DNS_MAX_SOURCE_PORTS) { + /* failed to get a UDP pcb */ + LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: "%s": failed to allocate a pcb\n", name)); + entry->state = DNS_STATE_UNUSED; + req->found = NULL; + return ERR_MEM; + } + LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: "%s": use DNS pcb %"U16_F"\n", name, (u16_t)(entry->pcb_idx))); +#endif + +#if LWIP_DNS_SUPPORT_MDNS_QUERIES + entry->is_mdns = is_mdns; +#endif + + dns_seqno++; + + /* force to send query without waiting timer */ + dns_check_entry(i); + + /* dns query is enqueued */ + return ERR_INPROGRESS; +} + +/** + * @ingroup dns + * Resolve a hostname (string) into an IP address. + * NON-BLOCKING callback version for use with raw API!!! + * + * Returns immediately with one of err_t return codes: + * - ERR_OK if hostname is a valid IP address string or the host + * name is already in the local names table. + * - ERR_INPROGRESS enqueue a request to be sent to the DNS server + * for resolution if no errors are present. + * - ERR_ARG: dns client not initialized or invalid hostname + * + * @param hostname the hostname that is to be queried + * @param addr pointer to a ip_addr_t where to store the address if it is already + * cached in the dns_table (only valid if ERR_OK is returned!) + * @param found a callback function to be called on success, failure or timeout (only if + * ERR_INPROGRESS is returned!) + * @param callback_arg argument to pass to the callback function + * @return a err_t return code. + */ +err_t +dns_gethostbyname(const char *hostname, ip_addr_t *addr, dns_found_callback found, + void *callback_arg) +{ + return dns_gethostbyname_addrtype(hostname, addr, found, callback_arg, LWIP_DNS_ADDRTYPE_DEFAULT); +} + +/** + * @ingroup dns + * Like dns_gethostbyname, but returned address type can be controlled: + * @param hostname the hostname that is to be queried + * @param addr pointer to a ip_addr_t where to store the address if it is already + * cached in the dns_table (only valid if ERR_OK is returned!) + * @param found a callback function to be called on success, failure or timeout (only if + * ERR_INPROGRESS is returned!) + * @param callback_arg argument to pass to the callback function + * @param dns_addrtype - LWIP_DNS_ADDRTYPE_IPV4_IPV6: try to resolve IPv4 first, try IPv6 if IPv4 fails only + * - LWIP_DNS_ADDRTYPE_IPV6_IPV4: try to resolve IPv6 first, try IPv4 if IPv6 fails only + * - LWIP_DNS_ADDRTYPE_IPV4: try to resolve IPv4 only + * - LWIP_DNS_ADDRTYPE_IPV6: try to resolve IPv6 only + */ +err_t +dns_gethostbyname_addrtype(const char *hostname, ip_addr_t *addr, dns_found_callback found, + void *callback_arg, u8_t dns_addrtype) +{ + size_t hostnamelen; +#if LWIP_DNS_SUPPORT_MDNS_QUERIES + u8_t is_mdns; +#endif + /* not initialized or no valid server yet, or invalid addr pointer + * or invalid hostname or invalid hostname length */ + if ((addr == NULL) || + (!hostname) || (!hostname[0])) { + return ERR_ARG; + } +#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) == 0) + if (dns_pcbs[0] == NULL) { + return ERR_ARG; + } +#endif + hostnamelen = strlen(hostname); + if (hostname[hostnamelen - 1] == '.') { + hostnamelen--; + } + if (hostnamelen >= DNS_MAX_NAME_LENGTH) { + LWIP_DEBUGF(DNS_DEBUG, ("dns_gethostbyname: name too long to resolve\n")); + return ERR_ARG; + } + + +#if LWIP_HAVE_LOOPIF + if (strcmp(hostname, "localhost") == 0) { + ip_addr_set_loopback(LWIP_DNS_ADDRTYPE_IS_IPV6(dns_addrtype), addr); + return ERR_OK; + } +#endif /* LWIP_HAVE_LOOPIF */ + + /* host name already in octet notation? set ip addr and return ERR_OK */ + if (ipaddr_aton(hostname, addr)) { +#if LWIP_IPV4 && LWIP_IPV6 + if ((IP_IS_V6(addr) && (dns_addrtype != LWIP_DNS_ADDRTYPE_IPV4)) || + (IP_IS_V4(addr) && (dns_addrtype != LWIP_DNS_ADDRTYPE_IPV6))) +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + { + return ERR_OK; + } + } + /* already have this address cached? */ + if (dns_lookup(hostname, hostnamelen, addr LWIP_DNS_ADDRTYPE_ARG(dns_addrtype)) == ERR_OK) { + return ERR_OK; + } +#if LWIP_IPV4 && LWIP_IPV6 + if ((dns_addrtype == LWIP_DNS_ADDRTYPE_IPV4_IPV6) || (dns_addrtype == LWIP_DNS_ADDRTYPE_IPV6_IPV4)) { + /* fallback to 2nd IP type and try again to lookup */ + u8_t fallback; + if (dns_addrtype == LWIP_DNS_ADDRTYPE_IPV4_IPV6) { + fallback = LWIP_DNS_ADDRTYPE_IPV6; + } else { + fallback = LWIP_DNS_ADDRTYPE_IPV4; + } + if (dns_lookup(hostname, hostnamelen, addr LWIP_DNS_ADDRTYPE_ARG(fallback)) == ERR_OK) { + return ERR_OK; + } + } +#else /* LWIP_IPV4 && LWIP_IPV6 */ + LWIP_UNUSED_ARG(dns_addrtype); +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + +#if LWIP_DNS_SUPPORT_MDNS_QUERIES + if (strstr(hostname, ".local") == &hostname[hostnamelen] - 6) { + is_mdns = 1; + } else { + is_mdns = 0; + } + + if (!is_mdns) +#endif /* LWIP_DNS_SUPPORT_MDNS_QUERIES */ + { + /* prevent calling found callback if no server is set, return error instead */ + if (ip_addr_isany_val(dns_servers[0])) { + return ERR_VAL; + } + } + + /* queue query with specified callback */ + return dns_enqueue(hostname, hostnamelen, found, callback_arg LWIP_DNS_ADDRTYPE_ARG(dns_addrtype) + LWIP_DNS_ISMDNS_ARG(is_mdns)); +} + +#endif /* LWIP_DNS */ diff --git a/lib/lwip/core/inet_chksum.c b/lib/lwip/core/inet_chksum.c new file mode 100644 index 0000000000..6a343ed730 --- /dev/null +++ b/lib/lwip/core/inet_chksum.c @@ -0,0 +1,608 @@ +/** + * @file + * Internet checksum functions. + * + * These are some reference implementations of the checksum algorithm, with the + * aim of being simple, correct and fully portable. Checksumming is the + * first thing you would want to optimize for your platform. If you create + * your own version, link it in and in your cc.h put: + * + * #define LWIP_CHKSUM your_checksum_routine + * + * Or you can select from the implementations below by defining + * LWIP_CHKSUM_ALGORITHM to 1, 2 or 3. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#include "lwip/inet_chksum.h" +#include "lwip/def.h" +#include "lwip/ip_addr.h" + +#include <string.h> + +#ifndef LWIP_CHKSUM +# define LWIP_CHKSUM lwip_standard_chksum +# ifndef LWIP_CHKSUM_ALGORITHM +# define LWIP_CHKSUM_ALGORITHM 2 +# endif +u16_t lwip_standard_chksum(const void *dataptr, int len); +#endif +/* If none set: */ +#ifndef LWIP_CHKSUM_ALGORITHM +# define LWIP_CHKSUM_ALGORITHM 0 +#endif + +#if (LWIP_CHKSUM_ALGORITHM == 1) /* Version #1 */ +/** + * lwip checksum + * + * @param dataptr points to start of data to be summed at any boundary + * @param len length of data to be summed + * @return host order (!) lwip checksum (non-inverted Internet sum) + * + * @note accumulator size limits summable length to 64k + * @note host endianness is irrelevant (p3 RFC1071) + */ +u16_t +lwip_standard_chksum(const void *dataptr, int len) +{ + u32_t acc; + u16_t src; + const u8_t *octetptr; + + acc = 0; + /* dataptr may be at odd or even addresses */ + octetptr = (const u8_t *)dataptr; + while (len > 1) { + /* declare first octet as most significant + thus assume network order, ignoring host order */ + src = (*octetptr) << 8; + octetptr++; + /* declare second octet as least significant */ + src |= (*octetptr); + octetptr++; + acc += src; + len -= 2; + } + if (len > 0) { + /* accumulate remaining octet */ + src = (*octetptr) << 8; + acc += src; + } + /* add deferred carry bits */ + acc = (acc >> 16) + (acc & 0x0000ffffUL); + if ((acc & 0xffff0000UL) != 0) { + acc = (acc >> 16) + (acc & 0x0000ffffUL); + } + /* This maybe a little confusing: reorder sum using lwip_htons() + instead of lwip_ntohs() since it has a little less call overhead. + The caller must invert bits for Internet sum ! */ + return lwip_htons((u16_t)acc); +} +#endif + +#if (LWIP_CHKSUM_ALGORITHM == 2) /* Alternative version #2 */ +/* + * Curt McDowell + * Broadcom Corp. + * csm@broadcom.com + * + * IP checksum two bytes at a time with support for + * unaligned buffer. + * Works for len up to and including 0x20000. + * by Curt McDowell, Broadcom Corp. 12/08/2005 + * + * @param dataptr points to start of data to be summed at any boundary + * @param len length of data to be summed + * @return host order (!) lwip checksum (non-inverted Internet sum) + */ +u16_t +lwip_standard_chksum(const void *dataptr, int len) +{ + const u8_t *pb = (const u8_t *)dataptr; + const u16_t *ps; + u16_t t = 0; + u32_t sum = 0; + int odd = ((mem_ptr_t)pb & 1); + + /* Get aligned to u16_t */ + if (odd && len > 0) { + ((u8_t *)&t)[1] = *pb++; + len--; + } + + /* Add the bulk of the data */ + ps = (const u16_t *)(const void *)pb; + while (len > 1) { + sum += *ps++; + len -= 2; + } + + /* Consume left-over byte, if any */ + if (len > 0) { + ((u8_t *)&t)[0] = *(const u8_t *)ps; + } + + /* Add end bytes */ + sum += t; + + /* Fold 32-bit sum to 16 bits + calling this twice is probably faster than if statements... */ + sum = FOLD_U32T(sum); + sum = FOLD_U32T(sum); + + /* Swap if alignment was odd */ + if (odd) { + sum = SWAP_BYTES_IN_WORD(sum); + } + + return (u16_t)sum; +} +#endif + +#if (LWIP_CHKSUM_ALGORITHM == 3) /* Alternative version #3 */ +/** + * An optimized checksum routine. Basically, it uses loop-unrolling on + * the checksum loop, treating the head and tail bytes specially, whereas + * the inner loop acts on 8 bytes at a time. + * + * @arg start of buffer to be checksummed. May be an odd byte address. + * @len number of bytes in the buffer to be checksummed. + * @return host order (!) lwip checksum (non-inverted Internet sum) + * + * by Curt McDowell, Broadcom Corp. December 8th, 2005 + */ +u16_t +lwip_standard_chksum(const void *dataptr, int len) +{ + const u8_t *pb = (const u8_t *)dataptr; + const u16_t *ps; + u16_t t = 0; + const u32_t *pl; + u32_t sum = 0, tmp; + /* starts at odd byte address? */ + int odd = ((mem_ptr_t)pb & 1); + + if (odd && len > 0) { + ((u8_t *)&t)[1] = *pb++; + len--; + } + + ps = (const u16_t *)(const void *)pb; + + if (((mem_ptr_t)ps & 3) && len > 1) { + sum += *ps++; + len -= 2; + } + + pl = (const u32_t *)(const void *)ps; + + while (len > 7) { + tmp = sum + *pl++; /* ping */ + if (tmp < sum) { + tmp++; /* add back carry */ + } + + sum = tmp + *pl++; /* pong */ + if (sum < tmp) { + sum++; /* add back carry */ + } + + len -= 8; + } + + /* make room in upper bits */ + sum = FOLD_U32T(sum); + + ps = (const u16_t *)pl; + + /* 16-bit aligned word remaining? */ + while (len > 1) { + sum += *ps++; + len -= 2; + } + + /* dangling tail byte remaining? */ + if (len > 0) { /* include odd byte */ + ((u8_t *)&t)[0] = *(const u8_t *)ps; + } + + sum += t; /* add end bytes */ + + /* Fold 32-bit sum to 16 bits + calling this twice is probably faster than if statements... */ + sum = FOLD_U32T(sum); + sum = FOLD_U32T(sum); + + if (odd) { + sum = SWAP_BYTES_IN_WORD(sum); + } + + return (u16_t)sum; +} +#endif + +/** Parts of the pseudo checksum which are common to IPv4 and IPv6 */ +static u16_t +inet_cksum_pseudo_base(struct pbuf *p, u8_t proto, u16_t proto_len, u32_t acc) +{ + struct pbuf *q; + int swapped = 0; + + /* iterate through all pbuf in chain */ + for (q = p; q != NULL; q = q->next) { + LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n", + (void *)q, (void *)q->next)); + acc += LWIP_CHKSUM(q->payload, q->len); + /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%"X32_F" \n", acc));*/ + /* just executing this next line is probably faster that the if statement needed + to check whether we really need to execute it, and does no harm */ + acc = FOLD_U32T(acc); + if (q->len % 2 != 0) { + swapped = !swapped; + acc = SWAP_BYTES_IN_WORD(acc); + } + /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%"X32_F" \n", acc));*/ + } + + if (swapped) { + acc = SWAP_BYTES_IN_WORD(acc); + } + + acc += (u32_t)lwip_htons((u16_t)proto); + acc += (u32_t)lwip_htons(proto_len); + + /* Fold 32-bit sum to 16 bits + calling this twice is probably faster than if statements... */ + acc = FOLD_U32T(acc); + acc = FOLD_U32T(acc); + LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%"X32_F"\n", acc)); + return (u16_t)~(acc & 0xffffUL); +} + +#if LWIP_IPV4 +/* inet_chksum_pseudo: + * + * Calculates the IPv4 pseudo Internet checksum used by TCP and UDP for a pbuf chain. + * IP addresses are expected to be in network byte order. + * + * @param p chain of pbufs over that a checksum should be calculated (ip data part) + * @param src source ip address (used for checksum of pseudo header) + * @param dst destination ip address (used for checksum of pseudo header) + * @param proto ip protocol (used for checksum of pseudo header) + * @param proto_len length of the ip data part (used for checksum of pseudo header) + * @return checksum (as u16_t) to be saved directly in the protocol header + */ +u16_t +inet_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len, + const ip4_addr_t *src, const ip4_addr_t *dest) +{ + u32_t acc; + u32_t addr; + + addr = ip4_addr_get_u32(src); + acc = (addr & 0xffffUL); + acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL)); + addr = ip4_addr_get_u32(dest); + acc = (u32_t)(acc + (addr & 0xffffUL)); + acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL)); + /* fold down to 16 bits */ + acc = FOLD_U32T(acc); + acc = FOLD_U32T(acc); + + return inet_cksum_pseudo_base(p, proto, proto_len, acc); +} +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +/** + * Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain. + * IPv6 addresses are expected to be in network byte order. + * + * @param p chain of pbufs over that a checksum should be calculated (ip data part) + * @param proto ipv6 protocol/next header (used for checksum of pseudo header) + * @param proto_len length of the ipv6 payload (used for checksum of pseudo header) + * @param src source ipv6 address (used for checksum of pseudo header) + * @param dest destination ipv6 address (used for checksum of pseudo header) + * @return checksum (as u16_t) to be saved directly in the protocol header + */ +u16_t +ip6_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len, + const ip6_addr_t *src, const ip6_addr_t *dest) +{ + u32_t acc = 0; + u32_t addr; + u8_t addr_part; + + for (addr_part = 0; addr_part < 4; addr_part++) { + addr = src->addr[addr_part]; + acc = (u32_t)(acc + (addr & 0xffffUL)); + acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL)); + addr = dest->addr[addr_part]; + acc = (u32_t)(acc + (addr & 0xffffUL)); + acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL)); + } + /* fold down to 16 bits */ + acc = FOLD_U32T(acc); + acc = FOLD_U32T(acc); + + return inet_cksum_pseudo_base(p, proto, proto_len, acc); +} +#endif /* LWIP_IPV6 */ + +/* ip_chksum_pseudo: + * + * Calculates the IPv4 or IPv6 pseudo Internet checksum used by TCP and UDP for a pbuf chain. + * IP addresses are expected to be in network byte order. + * + * @param p chain of pbufs over that a checksum should be calculated (ip data part) + * @param src source ip address (used for checksum of pseudo header) + * @param dst destination ip address (used for checksum of pseudo header) + * @param proto ip protocol (used for checksum of pseudo header) + * @param proto_len length of the ip data part (used for checksum of pseudo header) + * @return checksum (as u16_t) to be saved directly in the protocol header + */ +u16_t +ip_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len, + const ip_addr_t *src, const ip_addr_t *dest) +{ +#if LWIP_IPV6 + if (IP_IS_V6(dest)) { + return ip6_chksum_pseudo(p, proto, proto_len, ip_2_ip6(src), ip_2_ip6(dest)); + } +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 && LWIP_IPV6 + else +#endif /* LWIP_IPV4 && LWIP_IPV6 */ +#if LWIP_IPV4 + { + return inet_chksum_pseudo(p, proto, proto_len, ip_2_ip4(src), ip_2_ip4(dest)); + } +#endif /* LWIP_IPV4 */ +} + +/** Parts of the pseudo checksum which are common to IPv4 and IPv6 */ +static u16_t +inet_cksum_pseudo_partial_base(struct pbuf *p, u8_t proto, u16_t proto_len, + u16_t chksum_len, u32_t acc) +{ + struct pbuf *q; + int swapped = 0; + u16_t chklen; + + /* iterate through all pbuf in chain */ + for (q = p; (q != NULL) && (chksum_len > 0); q = q->next) { + LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n", + (void *)q, (void *)q->next)); + chklen = q->len; + if (chklen > chksum_len) { + chklen = chksum_len; + } + acc += LWIP_CHKSUM(q->payload, chklen); + chksum_len = (u16_t)(chksum_len - chklen); + LWIP_ASSERT("delete me", chksum_len < 0x7fff); + /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%"X32_F" \n", acc));*/ + /* fold the upper bit down */ + acc = FOLD_U32T(acc); + if (q->len % 2 != 0) { + swapped = !swapped; + acc = SWAP_BYTES_IN_WORD(acc); + } + /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%"X32_F" \n", acc));*/ + } + + if (swapped) { + acc = SWAP_BYTES_IN_WORD(acc); + } + + acc += (u32_t)lwip_htons((u16_t)proto); + acc += (u32_t)lwip_htons(proto_len); + + /* Fold 32-bit sum to 16 bits + calling this twice is probably faster than if statements... */ + acc = FOLD_U32T(acc); + acc = FOLD_U32T(acc); + LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%"X32_F"\n", acc)); + return (u16_t)~(acc & 0xffffUL); +} + +#if LWIP_IPV4 +/* inet_chksum_pseudo_partial: + * + * Calculates the IPv4 pseudo Internet checksum used by TCP and UDP for a pbuf chain. + * IP addresses are expected to be in network byte order. + * + * @param p chain of pbufs over that a checksum should be calculated (ip data part) + * @param src source ip address (used for checksum of pseudo header) + * @param dst destination ip address (used for checksum of pseudo header) + * @param proto ip protocol (used for checksum of pseudo header) + * @param proto_len length of the ip data part (used for checksum of pseudo header) + * @return checksum (as u16_t) to be saved directly in the protocol header + */ +u16_t +inet_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len, + u16_t chksum_len, const ip4_addr_t *src, const ip4_addr_t *dest) +{ + u32_t acc; + u32_t addr; + + addr = ip4_addr_get_u32(src); + acc = (addr & 0xffffUL); + acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL)); + addr = ip4_addr_get_u32(dest); + acc = (u32_t)(acc + (addr & 0xffffUL)); + acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL)); + /* fold down to 16 bits */ + acc = FOLD_U32T(acc); + acc = FOLD_U32T(acc); + + return inet_cksum_pseudo_partial_base(p, proto, proto_len, chksum_len, acc); +} +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +/** + * Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain. + * IPv6 addresses are expected to be in network byte order. Will only compute for a + * portion of the payload. + * + * @param p chain of pbufs over that a checksum should be calculated (ip data part) + * @param proto ipv6 protocol/next header (used for checksum of pseudo header) + * @param proto_len length of the ipv6 payload (used for checksum of pseudo header) + * @param chksum_len number of payload bytes used to compute chksum + * @param src source ipv6 address (used for checksum of pseudo header) + * @param dest destination ipv6 address (used for checksum of pseudo header) + * @return checksum (as u16_t) to be saved directly in the protocol header + */ +u16_t +ip6_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len, + u16_t chksum_len, const ip6_addr_t *src, const ip6_addr_t *dest) +{ + u32_t acc = 0; + u32_t addr; + u8_t addr_part; + + for (addr_part = 0; addr_part < 4; addr_part++) { + addr = src->addr[addr_part]; + acc = (u32_t)(acc + (addr & 0xffffUL)); + acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL)); + addr = dest->addr[addr_part]; + acc = (u32_t)(acc + (addr & 0xffffUL)); + acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL)); + } + /* fold down to 16 bits */ + acc = FOLD_U32T(acc); + acc = FOLD_U32T(acc); + + return inet_cksum_pseudo_partial_base(p, proto, proto_len, chksum_len, acc); +} +#endif /* LWIP_IPV6 */ + +/* ip_chksum_pseudo_partial: + * + * Calculates the IPv4 or IPv6 pseudo Internet checksum used by TCP and UDP for a pbuf chain. + * + * @param p chain of pbufs over that a checksum should be calculated (ip data part) + * @param src source ip address (used for checksum of pseudo header) + * @param dst destination ip address (used for checksum of pseudo header) + * @param proto ip protocol (used for checksum of pseudo header) + * @param proto_len length of the ip data part (used for checksum of pseudo header) + * @return checksum (as u16_t) to be saved directly in the protocol header + */ +u16_t +ip_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len, + u16_t chksum_len, const ip_addr_t *src, const ip_addr_t *dest) +{ +#if LWIP_IPV6 + if (IP_IS_V6(dest)) { + return ip6_chksum_pseudo_partial(p, proto, proto_len, chksum_len, ip_2_ip6(src), ip_2_ip6(dest)); + } +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 && LWIP_IPV6 + else +#endif /* LWIP_IPV4 && LWIP_IPV6 */ +#if LWIP_IPV4 + { + return inet_chksum_pseudo_partial(p, proto, proto_len, chksum_len, ip_2_ip4(src), ip_2_ip4(dest)); + } +#endif /* LWIP_IPV4 */ +} + +/* inet_chksum: + * + * Calculates the Internet checksum over a portion of memory. Used primarily for IP + * and ICMP. + * + * @param dataptr start of the buffer to calculate the checksum (no alignment needed) + * @param len length of the buffer to calculate the checksum + * @return checksum (as u16_t) to be saved directly in the protocol header + */ + +u16_t +inet_chksum(const void *dataptr, u16_t len) +{ + return (u16_t)~(unsigned int)LWIP_CHKSUM(dataptr, len); +} + +/** + * Calculate a checksum over a chain of pbufs (without pseudo-header, much like + * inet_chksum only pbufs are used). + * + * @param p pbuf chain over that the checksum should be calculated + * @return checksum (as u16_t) to be saved directly in the protocol header + */ +u16_t +inet_chksum_pbuf(struct pbuf *p) +{ + u32_t acc; + struct pbuf *q; + int swapped = 0; + + acc = 0; + for (q = p; q != NULL; q = q->next) { + acc += LWIP_CHKSUM(q->payload, q->len); + acc = FOLD_U32T(acc); + if (q->len % 2 != 0) { + swapped = !swapped; + acc = SWAP_BYTES_IN_WORD(acc); + } + } + + if (swapped) { + acc = SWAP_BYTES_IN_WORD(acc); + } + return (u16_t)~(acc & 0xffffUL); +} + +/* These are some implementations for LWIP_CHKSUM_COPY, which copies data + * like MEMCPY but generates a checksum at the same time. Since this is a + * performance-sensitive function, you might want to create your own version + * in assembly targeted at your hardware by defining it in lwipopts.h: + * #define LWIP_CHKSUM_COPY(dst, src, len) your_chksum_copy(dst, src, len) + */ + +#if (LWIP_CHKSUM_COPY_ALGORITHM == 1) /* Version #1 */ +/** Safe but slow: first call MEMCPY, then call LWIP_CHKSUM. + * For architectures with big caches, data might still be in cache when + * generating the checksum after copying. + */ +u16_t +lwip_chksum_copy(void *dst, const void *src, u16_t len) +{ + MEMCPY(dst, src, len); + return LWIP_CHKSUM(dst, len); +} +#endif /* (LWIP_CHKSUM_COPY_ALGORITHM == 1) */ diff --git a/lib/lwip/core/init.c b/lib/lwip/core/init.c new file mode 100644 index 0000000000..0013a8998e --- /dev/null +++ b/lib/lwip/core/init.c @@ -0,0 +1,387 @@ +/** + * @file + * Modules initialization + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + */ + +#include "lwip/opt.h" + +#include "lwip/init.h" +#include "lwip/stats.h" +#include "lwip/sys.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/pbuf.h" +#include "lwip/netif.h" +#include "lwip/sockets.h" +#include "lwip/ip.h" +#include "lwip/raw.h" +#include "lwip/udp.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/igmp.h" +#include "lwip/dns.h" +#include "lwip/timeouts.h" +#include "lwip/etharp.h" +#include "lwip/ip6.h" +#include "lwip/nd6.h" +#include "lwip/mld6.h" +#include "lwip/api.h" + +#include "netif/ppp/ppp_opts.h" +#include "netif/ppp/ppp_impl.h" + +#ifndef LWIP_SKIP_PACKING_CHECK + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct packed_struct_test { + PACK_STRUCT_FLD_8(u8_t dummy1); + PACK_STRUCT_FIELD(u32_t dummy2); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define PACKED_STRUCT_TEST_EXPECTED_SIZE 5 + +#endif + +/* Compile-time sanity checks for configuration errors. + * These can be done independently of LWIP_DEBUG, without penalty. + */ +#ifndef BYTE_ORDER +#error "BYTE_ORDER is not defined, you have to define it in your cc.h" +#endif +#if (!IP_SOF_BROADCAST && IP_SOF_BROADCAST_RECV) +#error "If you want to use broadcast filter per pcb on recv operations, you have to define IP_SOF_BROADCAST=1 in your lwipopts.h" +#endif +#if (!LWIP_UDP && LWIP_UDPLITE) +#error "If you want to use UDP Lite, you have to define LWIP_UDP=1 in your lwipopts.h" +#endif +#if (!LWIP_UDP && LWIP_DHCP) +#error "If you want to use DHCP, you have to define LWIP_UDP=1 in your lwipopts.h" +#endif +#if (!LWIP_UDP && !LWIP_RAW && LWIP_MULTICAST_TX_OPTIONS) +#error "If you want to use LWIP_MULTICAST_TX_OPTIONS, you have to define LWIP_UDP=1 and/or LWIP_RAW=1 in your lwipopts.h" +#endif +#if (!LWIP_UDP && LWIP_DNS) +#error "If you want to use DNS, you have to define LWIP_UDP=1 in your lwipopts.h" +#endif +#if !MEMP_MEM_MALLOC /* MEMP_NUM_* checks are disabled when not using the pool allocator */ +#if (LWIP_ARP && ARP_QUEUEING && (MEMP_NUM_ARP_QUEUE<=0)) +#error "If you want to use ARP Queueing, you have to define MEMP_NUM_ARP_QUEUE>=1 in your lwipopts.h" +#endif +#if (LWIP_RAW && (MEMP_NUM_RAW_PCB<=0)) +#error "If you want to use RAW, you have to define MEMP_NUM_RAW_PCB>=1 in your lwipopts.h" +#endif +#if (LWIP_UDP && (MEMP_NUM_UDP_PCB<=0)) +#error "If you want to use UDP, you have to define MEMP_NUM_UDP_PCB>=1 in your lwipopts.h" +#endif +#if (LWIP_TCP && (MEMP_NUM_TCP_PCB<=0)) +#error "If you want to use TCP, you have to define MEMP_NUM_TCP_PCB>=1 in your lwipopts.h" +#endif +#if (LWIP_IGMP && (MEMP_NUM_IGMP_GROUP<=1)) +#error "If you want to use IGMP, you have to define MEMP_NUM_IGMP_GROUP>1 in your lwipopts.h" +#endif +#if (LWIP_IGMP && !LWIP_MULTICAST_TX_OPTIONS) +#error "If you want to use IGMP, you have to define LWIP_MULTICAST_TX_OPTIONS==1 in your lwipopts.h" +#endif +#if (LWIP_IGMP && !LWIP_IPV4) +#error "IGMP needs LWIP_IPV4 enabled in your lwipopts.h" +#endif +#if ((LWIP_NETCONN || LWIP_SOCKET) && (MEMP_NUM_TCPIP_MSG_API<=0)) +#error "If you want to use Sequential API, you have to define MEMP_NUM_TCPIP_MSG_API>=1 in your lwipopts.h" +#endif +/* There must be sufficient timeouts, taking into account requirements of the subsystems. */ +#if LWIP_TIMERS && (MEMP_NUM_SYS_TIMEOUT < LWIP_NUM_SYS_TIMEOUT_INTERNAL) +#error "MEMP_NUM_SYS_TIMEOUT is too low to accommodate all required timeouts" +#endif +#if (IP_REASSEMBLY && (MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS)) +#error "MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS doesn't make sense since each struct ip_reassdata must hold 2 pbufs at least!" +#endif +#endif /* !MEMP_MEM_MALLOC */ +#if LWIP_WND_SCALE +#if (LWIP_TCP && (TCP_WND > 0xffffffff)) +#error "If you want to use TCP, TCP_WND must fit in an u32_t, so, you have to reduce it in your lwipopts.h" +#endif +#if (LWIP_TCP && (TCP_RCV_SCALE > 14)) +#error "The maximum valid window scale value is 14!" +#endif +#if (LWIP_TCP && (TCP_WND > (0xFFFFU << TCP_RCV_SCALE))) +#error "TCP_WND is bigger than the configured LWIP_WND_SCALE allows!" +#endif +#if (LWIP_TCP && ((TCP_WND >> TCP_RCV_SCALE) == 0)) +#error "TCP_WND is too small for the configured LWIP_WND_SCALE (results in zero window)!" +#endif +#else /* LWIP_WND_SCALE */ +#if (LWIP_TCP && (TCP_WND > 0xffff)) +#error "If you want to use TCP, TCP_WND must fit in an u16_t, so, you have to reduce it in your lwipopts.h (or enable window scaling)" +#endif +#endif /* LWIP_WND_SCALE */ +#if (LWIP_TCP && (TCP_SND_QUEUELEN > 0xffff)) +#error "If you want to use TCP, TCP_SND_QUEUELEN must fit in an u16_t, so, you have to reduce it in your lwipopts.h" +#endif +#if (LWIP_TCP && (TCP_SND_QUEUELEN < 2)) +#error "TCP_SND_QUEUELEN must be at least 2 for no-copy TCP writes to work" +#endif +#if (LWIP_TCP && ((TCP_MAXRTX > 12) || (TCP_SYNMAXRTX > 12))) +#error "If you want to use TCP, TCP_MAXRTX and TCP_SYNMAXRTX must less or equal to 12 (due to tcp_backoff table), so, you have to reduce them in your lwipopts.h" +#endif +#if (LWIP_TCP && TCP_LISTEN_BACKLOG && ((TCP_DEFAULT_LISTEN_BACKLOG < 0) || (TCP_DEFAULT_LISTEN_BACKLOG > 0xff))) +#error "If you want to use TCP backlog, TCP_DEFAULT_LISTEN_BACKLOG must fit into an u8_t" +#endif +#if (LWIP_TCP && LWIP_TCP_SACK_OUT && !TCP_QUEUE_OOSEQ) +#error "To use LWIP_TCP_SACK_OUT, TCP_QUEUE_OOSEQ needs to be enabled" +#endif +#if (LWIP_TCP && LWIP_TCP_SACK_OUT && (LWIP_TCP_MAX_SACK_NUM < 1)) +#error "LWIP_TCP_MAX_SACK_NUM must be greater than 0" +#endif +#if (LWIP_NETIF_API && (NO_SYS==1)) +#error "If you want to use NETIF API, you have to define NO_SYS=0 in your lwipopts.h" +#endif +#if ((LWIP_SOCKET || LWIP_NETCONN) && (NO_SYS==1)) +#error "If you want to use Sequential API, you have to define NO_SYS=0 in your lwipopts.h" +#endif +#if (LWIP_PPP_API && (NO_SYS==1)) +#error "If you want to use PPP API, you have to define NO_SYS=0 in your lwipopts.h" +#endif +#if (LWIP_PPP_API && (PPP_SUPPORT==0)) +#error "If you want to use PPP API, you have to enable PPP_SUPPORT in your lwipopts.h" +#endif +#if (((!LWIP_DHCP) || (!LWIP_AUTOIP)) && LWIP_DHCP_AUTOIP_COOP) +#error "If you want to use DHCP/AUTOIP cooperation mode, you have to define LWIP_DHCP=1 and LWIP_AUTOIP=1 in your lwipopts.h" +#endif +#if (((!LWIP_DHCP) || (!LWIP_ARP) || (!LWIP_ACD)) && LWIP_DHCP_DOES_ACD_CHECK) +#error "If you want to use DHCP ACD checking, you have to define LWIP_DHCP=1, LWIP_ARP=1 and LWIP_ACD=1 in your lwipopts.h" +#endif +#if (!LWIP_ARP && LWIP_AUTOIP) +#error "If you want to use AUTOIP, you have to define LWIP_ARP=1 in your lwipopts.h" +#endif +#if (LWIP_TCP && ((LWIP_EVENT_API && LWIP_CALLBACK_API) || (!LWIP_EVENT_API && !LWIP_CALLBACK_API))) +#error "One and exactly one of LWIP_EVENT_API and LWIP_CALLBACK_API has to be enabled in your lwipopts.h" +#endif +#if (LWIP_ALTCP && LWIP_EVENT_API) +#error "The application layered tcp API does not work with LWIP_EVENT_API" +#endif +#if (MEM_LIBC_MALLOC && MEM_USE_POOLS) +#error "MEM_LIBC_MALLOC and MEM_USE_POOLS may not both be simultaneously enabled in your lwipopts.h" +#endif +#if (MEM_USE_POOLS && !MEMP_USE_CUSTOM_POOLS) +#error "MEM_USE_POOLS requires custom pools (MEMP_USE_CUSTOM_POOLS) to be enabled in your lwipopts.h" +#endif +#if (PBUF_POOL_BUFSIZE <= MEM_ALIGNMENT) +#error "PBUF_POOL_BUFSIZE must be greater than MEM_ALIGNMENT or the offset may take the full first pbuf" +#endif +#if (DNS_LOCAL_HOSTLIST && !DNS_LOCAL_HOSTLIST_IS_DYNAMIC && !(defined(DNS_LOCAL_HOSTLIST_INIT))) +#error "you have to define define DNS_LOCAL_HOSTLIST_INIT {{'host1', 0x123}, {'host2', 0x234}} to initialize DNS_LOCAL_HOSTLIST" +#endif +#if PPP_SUPPORT && !PPPOS_SUPPORT && !PPPOE_SUPPORT && !PPPOL2TP_SUPPORT +#error "PPP_SUPPORT needs at least one of PPPOS_SUPPORT, PPPOE_SUPPORT or PPPOL2TP_SUPPORT turned on" +#endif +#if PPP_SUPPORT && !PPP_IPV4_SUPPORT && !PPP_IPV6_SUPPORT +#error "PPP_SUPPORT needs PPP_IPV4_SUPPORT and/or PPP_IPV6_SUPPORT turned on" +#endif +#if PPP_SUPPORT && PPP_IPV4_SUPPORT && !LWIP_IPV4 +#error "PPP_IPV4_SUPPORT needs LWIP_IPV4 turned on" +#endif +#if PPP_SUPPORT && PPP_IPV6_SUPPORT && !LWIP_IPV6 +#error "PPP_IPV6_SUPPORT needs LWIP_IPV6 turned on" +#endif +#if PPP_SUPPORT && CCP_SUPPORT && !MPPE_SUPPORT +#error "CCP_SUPPORT needs MPPE_SUPPORT turned on" +#endif +#if !LWIP_ETHERNET && (LWIP_ARP || PPPOE_SUPPORT) +#error "LWIP_ETHERNET needs to be turned on for LWIP_ARP or PPPOE_SUPPORT" +#endif +#if LWIP_TCPIP_CORE_LOCKING_INPUT && !LWIP_TCPIP_CORE_LOCKING +#error "When using LWIP_TCPIP_CORE_LOCKING_INPUT, LWIP_TCPIP_CORE_LOCKING must be enabled, too" +#endif +#if LWIP_TCP && LWIP_NETIF_TX_SINGLE_PBUF && !TCP_OVERSIZE +#error "LWIP_NETIF_TX_SINGLE_PBUF needs TCP_OVERSIZE enabled to create single-pbuf TCP packets" +#endif +#if LWIP_NETCONN && LWIP_TCP +#if NETCONN_COPY != TCP_WRITE_FLAG_COPY +#error "NETCONN_COPY != TCP_WRITE_FLAG_COPY" +#endif +#if NETCONN_MORE != TCP_WRITE_FLAG_MORE +#error "NETCONN_MORE != TCP_WRITE_FLAG_MORE" +#endif +#endif /* LWIP_NETCONN && LWIP_TCP */ +#if LWIP_NETCONN_FULLDUPLEX && !LWIP_NETCONN_SEM_PER_THREAD +#error "For LWIP_NETCONN_FULLDUPLEX to work, LWIP_NETCONN_SEM_PER_THREAD is required" +#endif + + +/* Compile-time checks for deprecated options. + */ +#ifdef MEMP_NUM_TCPIP_MSG +#error "MEMP_NUM_TCPIP_MSG option is deprecated. Remove it from your lwipopts.h." +#endif +#ifdef TCP_REXMIT_DEBUG +#error "TCP_REXMIT_DEBUG option is deprecated. Remove it from your lwipopts.h." +#endif +#ifdef RAW_STATS +#error "RAW_STATS option is deprecated. Remove it from your lwipopts.h." +#endif +#ifdef ETHARP_QUEUE_FIRST +#error "ETHARP_QUEUE_FIRST option is deprecated. Remove it from your lwipopts.h." +#endif +#ifdef ETHARP_ALWAYS_INSERT +#error "ETHARP_ALWAYS_INSERT option is deprecated. Remove it from your lwipopts.h." +#endif +#if !NO_SYS && LWIP_TCPIP_CORE_LOCKING && LWIP_COMPAT_MUTEX && !defined(LWIP_COMPAT_MUTEX_ALLOWED) +#error "LWIP_COMPAT_MUTEX cannot prevent priority inversion. It is recommended to implement priority-aware mutexes. (Define LWIP_COMPAT_MUTEX_ALLOWED to disable this error.)" +#endif + +#ifndef LWIP_DISABLE_TCP_SANITY_CHECKS +#define LWIP_DISABLE_TCP_SANITY_CHECKS 0 +#endif +#ifndef LWIP_DISABLE_MEMP_SANITY_CHECKS +#define LWIP_DISABLE_MEMP_SANITY_CHECKS 0 +#endif + +/* MEMP sanity checks */ +#if MEMP_MEM_MALLOC +#if !LWIP_DISABLE_MEMP_SANITY_CHECKS +#if LWIP_NETCONN || LWIP_SOCKET +#if !MEMP_NUM_NETCONN && LWIP_SOCKET +#error "lwip_sanity_check: WARNING: MEMP_NUM_NETCONN cannot be 0 when using sockets!" +#endif +#else /* MEMP_MEM_MALLOC */ +#if MEMP_NUM_NETCONN > (MEMP_NUM_TCP_PCB+MEMP_NUM_TCP_PCB_LISTEN+MEMP_NUM_UDP_PCB+MEMP_NUM_RAW_PCB) +#error "lwip_sanity_check: WARNING: MEMP_NUM_NETCONN should be less than the sum of MEMP_NUM_{TCP,RAW,UDP}_PCB+MEMP_NUM_TCP_PCB_LISTEN. If you know what you are doing, define LWIP_DISABLE_MEMP_SANITY_CHECKS to 1 to disable this error." +#endif +#endif /* LWIP_NETCONN || LWIP_SOCKET */ +#endif /* !LWIP_DISABLE_MEMP_SANITY_CHECKS */ +#if MEM_USE_POOLS +#error "MEMP_MEM_MALLOC and MEM_USE_POOLS cannot be enabled at the same time" +#endif +#ifdef LWIP_HOOK_MEMP_AVAILABLE +#error "LWIP_HOOK_MEMP_AVAILABLE doesn't make sense with MEMP_MEM_MALLOC" +#endif +#endif /* MEMP_MEM_MALLOC */ + +/* TCP sanity checks */ +#if !LWIP_DISABLE_TCP_SANITY_CHECKS +#if LWIP_TCP +#if !MEMP_MEM_MALLOC && (MEMP_NUM_TCP_SEG < TCP_SND_QUEUELEN) +#error "lwip_sanity_check: WARNING: MEMP_NUM_TCP_SEG should be at least as big as TCP_SND_QUEUELEN. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error." +#endif +#if TCP_SND_BUF < (2 * TCP_MSS) +#error "lwip_sanity_check: WARNING: TCP_SND_BUF must be at least as much as (2 * TCP_MSS) for things to work smoothly. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error." +#endif +#if TCP_SND_QUEUELEN < (2 * (TCP_SND_BUF / TCP_MSS)) +#error "lwip_sanity_check: WARNING: TCP_SND_QUEUELEN must be at least as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error." +#endif +#if TCP_SNDLOWAT >= TCP_SND_BUF +#error "lwip_sanity_check: WARNING: TCP_SNDLOWAT must be less than TCP_SND_BUF. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error." +#endif +#if TCP_MSS >= ((16 * 1024) - 1) +#error "lwip_sanity_check: WARNING: TCP_MSS must be <= 16382 to prevent u16_t underflow in TCP_SNDLOWAT calculation!" +#endif +#if TCP_SNDLOWAT >= (0xFFFF - (4 * TCP_MSS)) +#error "lwip_sanity_check: WARNING: TCP_SNDLOWAT must at least be 4*MSS below u16_t overflow!" +#endif +#if TCP_SNDQUEUELOWAT >= TCP_SND_QUEUELEN +#error "lwip_sanity_check: WARNING: TCP_SNDQUEUELOWAT must be less than TCP_SND_QUEUELEN. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error." +#endif +#if !MEMP_MEM_MALLOC && PBUF_POOL_SIZE && (PBUF_POOL_BUFSIZE <= (PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN)) +#error "lwip_sanity_check: WARNING: PBUF_POOL_BUFSIZE does not provide enough space for protocol headers. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error." +#endif +#if !MEMP_MEM_MALLOC && PBUF_POOL_SIZE && (TCP_WND > (PBUF_POOL_SIZE * (PBUF_POOL_BUFSIZE - (PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN)))) +#error "lwip_sanity_check: WARNING: TCP_WND is larger than space provided by PBUF_POOL_SIZE * (PBUF_POOL_BUFSIZE - protocol headers). If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error." +#endif +#if TCP_WND < TCP_MSS +#error "lwip_sanity_check: WARNING: TCP_WND is smaller than MSS. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error." +#endif +#endif /* LWIP_TCP */ +#endif /* !LWIP_DISABLE_TCP_SANITY_CHECKS */ + +/** + * @ingroup lwip_nosys + * Initialize all modules. + * Use this in NO_SYS mode. Use tcpip_init() otherwise. + */ +void +lwip_init(void) +{ +#ifndef LWIP_SKIP_CONST_CHECK + int a = 0; + LWIP_UNUSED_ARG(a); + LWIP_ASSERT("LWIP_CONST_CAST not implemented correctly. Check your lwIP port.", LWIP_CONST_CAST(void *, &a) == &a); +#endif +#ifndef LWIP_SKIP_PACKING_CHECK + LWIP_ASSERT("Struct packing not implemented correctly. Check your lwIP port.", sizeof(struct packed_struct_test) == PACKED_STRUCT_TEST_EXPECTED_SIZE); +#endif + + /* Modules initialization */ + stats_init(); +#if !NO_SYS + sys_init(); +#endif /* !NO_SYS */ + mem_init(); + memp_init(); + pbuf_init(); + netif_init(); +#if LWIP_IPV4 + ip_init(); +#if LWIP_ARP + etharp_init(); +#endif /* LWIP_ARP */ +#endif /* LWIP_IPV4 */ +#if LWIP_RAW + raw_init(); +#endif /* LWIP_RAW */ +#if LWIP_UDP + udp_init(); +#endif /* LWIP_UDP */ +#if LWIP_TCP + tcp_init(); +#endif /* LWIP_TCP */ +#if LWIP_IGMP + igmp_init(); +#endif /* LWIP_IGMP */ +#if LWIP_DNS + dns_init(); +#endif /* LWIP_DNS */ +#if PPP_SUPPORT + ppp_init(); +#endif + +#if LWIP_TIMERS + sys_timeouts_init(); +#endif /* LWIP_TIMERS */ +} diff --git a/lib/lwip/core/ip.c b/lib/lwip/core/ip.c new file mode 100644 index 0000000000..18514cf32c --- /dev/null +++ b/lib/lwip/core/ip.c @@ -0,0 +1,167 @@ +/** + * @file + * Common IPv4 and IPv6 code + * + * @defgroup ip IP + * @ingroup callbackstyle_api + * + * @defgroup ip4 IPv4 + * @ingroup ip + * + * @defgroup ip6 IPv6 + * @ingroup ip + * + * @defgroup ipaddr IP address handling + * @ingroup infrastructure + * + * @defgroup ip4addr IPv4 only + * @ingroup ipaddr + * + * @defgroup ip6addr IPv6 only + * @ingroup ipaddr + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_IPV4 || LWIP_IPV6 + +#include "lwip/ip_addr.h" +#include "lwip/ip.h" + +/** Global data for both IPv4 and IPv6 */ +struct ip_globals ip_data; + +#if LWIP_IPV4 && LWIP_IPV6 + +const ip_addr_t ip_addr_any_type = IPADDR_ANY_TYPE_INIT; + +/** + * @ingroup ipaddr + * Convert numeric IP address (both versions) into ASCII representation. + * returns ptr to static buffer; not reentrant! + * + * @param addr ip address in network order to convert + * @return pointer to a global static (!) buffer that holds the ASCII + * representation of addr + */ +char *ipaddr_ntoa(const ip_addr_t *addr) +{ + if (addr == NULL) { + return NULL; + } + if (IP_IS_V6(addr)) { + return ip6addr_ntoa(ip_2_ip6(addr)); + } else { + return ip4addr_ntoa(ip_2_ip4(addr)); + } +} + +/** + * @ingroup ipaddr + * Same as ipaddr_ntoa, but reentrant since a user-supplied buffer is used. + * + * @param addr ip address in network order to convert + * @param buf target buffer where the string is stored + * @param buflen length of buf + * @return either pointer to buf which now holds the ASCII + * representation of addr or NULL if buf was too small + */ +char *ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen) +{ + if (addr == NULL) { + return NULL; + } + if (IP_IS_V6(addr)) { + return ip6addr_ntoa_r(ip_2_ip6(addr), buf, buflen); + } else { + return ip4addr_ntoa_r(ip_2_ip4(addr), buf, buflen); + } +} + +/** + * @ingroup ipaddr + * Convert IP address string (both versions) to numeric. + * The version is auto-detected from the string. + * + * @param cp IP address string to convert + * @param addr conversion result is stored here + * @return 1 on success, 0 on error + */ +int +ipaddr_aton(const char *cp, ip_addr_t *addr) +{ + if (cp != NULL) { + const char *c; + for (c = cp; *c != 0; c++) { + if (*c == ':') { + /* contains a colon: IPv6 address */ + if (addr) { + IP_SET_TYPE_VAL(*addr, IPADDR_TYPE_V6); + } + return ip6addr_aton(cp, ip_2_ip6(addr)); + } else if (*c == '.') { + /* contains a dot: IPv4 address */ + break; + } + } + /* call ip4addr_aton as fallback or if IPv4 was found */ + if (addr) { + IP_SET_TYPE_VAL(*addr, IPADDR_TYPE_V4); + } + return ip4addr_aton(cp, ip_2_ip4(addr)); + } + return 0; +} + +/** + * @ingroup lwip_nosys + * If both IP versions are enabled, this function can dispatch packets to the correct one. + * Don't call directly, pass to netif_add() and call netif->input(). + */ +err_t +ip_input(struct pbuf *p, struct netif *inp) +{ + if (p != NULL) { + if (IP_HDR_GET_VERSION(p->payload) == 6) { + return ip6_input(p, inp); + } + return ip4_input(p, inp); + } + return ERR_VAL; +} + +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + +#endif /* LWIP_IPV4 || LWIP_IPV6 */ diff --git a/lib/lwip/core/ipv4/acd.c b/lib/lwip/core/ipv4/acd.c new file mode 100644 index 0000000000..2c7d867caf --- /dev/null +++ b/lib/lwip/core/ipv4/acd.c @@ -0,0 +1,557 @@ +/** + * @file + * + * ACD IPv4 Address Conflict Detection + * + * This is an IPv4 address conflict detection implementation for the lwIP TCP/IP + * stack. It aims to be conform to RFC5227. + * + * @defgroup acd ACD + * @ingroup ip4 + * ACD related functions + * USAGE: + * + * define @ref LWIP_ACD 1 in your lwipopts.h + * Options: + * ACD_TMR_INTERVAL msecs, + * I recommend a value of 100. The value must divide 1000 with a remainder almost 0. + * Possible values are 1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 .... + * + * For fixed IP: + * - call acd_start after selecting an IP address. The caller will be informed + * on conflict status via the callback function. + * + * With AUTOIP: + * - will be called from the autoip module. No extra's needed. + * + * With DHCP: + * - enable LWIP_DHCP_DOES_ACD_CHECK. Then it will be called from the dhcp module. + * No extra's needed. + */ + +/* + * + * Copyright (c) 2007 Dominik Spies kontakt@dspies.de + * Copyright (c) 2018 Jasper Verschueren jasper.verschueren@apart-audio.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Jasper Verschueren jasper.verschueren@apart-audio.com + * Author: Dominik Spies kontakt@dspies.de + */ + +#include "lwip/opt.h" + +/* don't build if not configured for use in lwipopts.h */ +#if LWIP_IPV4 && LWIP_ACD + +#include <string.h> + +#include "lwip/acd.h" +#include "lwip/prot/acd.h" + +#define ACD_FOREACH(acd, acd_list) for ((acd) = acd_list; (acd) != NULL; (acd) = (acd)->next) + +#define ACD_TICKS_PER_SECOND (1000 / ACD_TMR_INTERVAL) + +/* Define good random function (LWIP_RAND) in lwipopts.h */ +#ifdef LWIP_RAND +#define LWIP_ACD_RAND(netif, acd) LWIP_RAND() +#else /* LWIP_RAND */ +#ifdef LWIP_AUTOIP_RAND +#include "lwip/autoip.h" +#define LWIP_ACD_RAND(netif, acd) LWIP_AUTOIP_RAND(netif) /* for backwards compatibility */ +#else +#define LWIP_ACD_RAND(netif, acd) ((((u32_t)((netif->hwaddr[5]) & 0xff) << 24) | \ + ((u32_t)((netif->hwaddr[3]) & 0xff) << 16) | \ + ((u32_t)((netif->hwaddr[2]) & 0xff) << 8) | \ + ((u32_t)((netif->hwaddr[4]) & 0xff))) + \ + (acd->sent_num)) +#endif /* LWIP_AUTOIP_RAND */ +#endif /* LWIP_RAND */ + + +#define ACD_RANDOM_PROBE_WAIT(netif, acd) (LWIP_ACD_RAND(netif, acd) % \ + (PROBE_WAIT * ACD_TICKS_PER_SECOND)) + +#define ACD_RANDOM_PROBE_INTERVAL(netif, acd) ((LWIP_ACD_RAND(netif, acd) % \ + ((PROBE_MAX - PROBE_MIN) * ACD_TICKS_PER_SECOND)) + \ + (PROBE_MIN * ACD_TICKS_PER_SECOND )) + +/* Function definitions */ +static void acd_restart(struct netif *netif, struct acd *acd); +static void acd_handle_arp_conflict(struct netif *netif, struct acd *acd); +static void acd_put_in_passive_mode(struct netif *netif, struct acd *acd); + +/** + * @ingroup acd + * Add ACD client to the client list and initialize callback function + * + * @param netif network interface on which to start the acd + * client + * @param acd acd module to be added to the list + * @param acd_conflict_callback callback to be called when conflict information + * is available + */ +err_t +acd_add(struct netif *netif, struct acd *acd, + acd_conflict_callback_t acd_conflict_callback) +{ + struct acd *acd2; + + /* Set callback */ + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("acd_conflict_callback != NULL", acd_conflict_callback != NULL); + acd->acd_conflict_callback = acd_conflict_callback; + + /* Check if the acd struct is already added */ + for (acd2 = netif->acd_list; acd2 != NULL; acd2 = acd2->next) { + if (acd2 == acd) { + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_add(): acd already added to list\n")); + return ERR_OK; + } + } + + /* add acd struct to the list */ + acd->next = netif->acd_list; + netif->acd_list = acd; + + return ERR_OK; +} + +/** + * @ingroup acd + * Remvoe ACD client from the client list + * + * @param netif network interface from which to remove the acd client + * @param acd acd module to be removed from the list + */ +void +acd_remove(struct netif *netif, struct acd *acd) +{ + struct acd *acd2, *prev = NULL; + + LWIP_ASSERT_CORE_LOCKED(); + + for (acd2 = netif->acd_list; acd2 != NULL; acd2 = acd2->next) { + if (acd2 == acd) { + if (prev) { + prev->next = acd->next; + } else { + netif->acd_list = acd->next; + } + return; + } + prev = acd2; + } + LWIP_ASSERT(("acd_remove(): acd not on list\n"), 0); +} + + +/** + * @ingroup acd + * Start ACD client + * + * @param netif network interface on which to start the acd client + * @param acd acd module to start + * @param ipaddr ip address to perform acd on + */ +err_t +acd_start(struct netif *netif, struct acd *acd, ip4_addr_t ipaddr) +{ + err_t result = ERR_OK; + + LWIP_UNUSED_ARG(netif); + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_start(netif=%p) %c%c%"U16_F"\n", + (void *)netif, netif->name[0], + netif->name[1], (u16_t)netif->num)); + + /* init probing state */ + acd->sent_num = 0; + acd->lastconflict = 0; + ip4_addr_copy(acd->ipaddr, ipaddr); + acd->state = ACD_STATE_PROBE_WAIT; + + acd->ttw = (u16_t)(ACD_RANDOM_PROBE_WAIT(netif, acd)); + + return result; +} + +/** + * @ingroup acd + * Stop ACD client + * + * @param acd acd module to stop + */ +err_t +acd_stop(struct acd *acd) +{ + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("acd_stop\n")); + + if (acd != NULL) { + acd->state = ACD_STATE_OFF; + } + return ERR_OK; +} + +/** + * @ingroup acd + * Inform the ACD modules when the link goes down + * + * @param netif network interface on which to inform the ACD clients + */ +void +acd_network_changed_link_down(struct netif *netif) +{ + struct acd *acd; + /* loop over the acd's*/ + ACD_FOREACH(acd, netif->acd_list) { + acd_stop(acd); + } +} + +/** + * Has to be called in loop every ACD_TMR_INTERVAL milliseconds + */ +void +acd_tmr(void) +{ + struct netif *netif; + struct acd *acd; + /* loop through netif's */ + NETIF_FOREACH(netif) { + ACD_FOREACH(acd, netif->acd_list) { + if (acd->lastconflict > 0) { + acd->lastconflict--; + } + + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE, + ("acd_tmr() ACD-State: %"U16_F", ttw=%"U16_F"\n", + (u16_t)(acd->state), acd->ttw)); + + if (acd->ttw > 0) { + acd->ttw--; + } + + switch (acd->state) { + case ACD_STATE_PROBE_WAIT: + case ACD_STATE_PROBING: + if (acd->ttw == 0) { + acd->state = ACD_STATE_PROBING; + etharp_acd_probe(netif, &acd->ipaddr); + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE, + ("acd_tmr() PROBING Sent Probe\n")); + acd->sent_num++; + if (acd->sent_num >= PROBE_NUM) { + /* Switch to ANNOUNCE_WAIT: last probe is sent*/ + acd->state = ACD_STATE_ANNOUNCE_WAIT; + + acd->sent_num = 0; + + /* calculate time to wait before announcing */ + acd->ttw = (u16_t)(ANNOUNCE_WAIT * ACD_TICKS_PER_SECOND); + } else { + /* calculate time to wait to next probe */ + acd->ttw = (u16_t)(ACD_RANDOM_PROBE_INTERVAL(netif, acd)); + } + } + break; + + case ACD_STATE_ANNOUNCE_WAIT: + case ACD_STATE_ANNOUNCING: + if (acd->ttw == 0) { + if (acd->sent_num == 0) { + acd->state = ACD_STATE_ANNOUNCING; + + /* reset conflict count to ensure fast re-probing after announcing */ + acd->num_conflicts = 0; + + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_tmr(): changing state to ANNOUNCING: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + ip4_addr1_16(&acd->ipaddr), ip4_addr2_16(&acd->ipaddr), + ip4_addr3_16(&acd->ipaddr), ip4_addr4_16(&acd->ipaddr))); + } + + etharp_acd_announce(netif, &acd->ipaddr); + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE, + ("acd_tmr() ANNOUNCING Sent Announce\n")); + acd->ttw = ANNOUNCE_INTERVAL * ACD_TICKS_PER_SECOND; + acd->sent_num++; + + if (acd->sent_num >= ANNOUNCE_NUM) { + acd->state = ACD_STATE_ONGOING; + acd->sent_num = 0; + acd->ttw = 0; + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_tmr(): changing state to ONGOING: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + ip4_addr1_16(&acd->ipaddr), ip4_addr2_16(&acd->ipaddr), + ip4_addr3_16(&acd->ipaddr), ip4_addr4_16(&acd->ipaddr))); + + /* finally, let acd user know that the address is good and can be used */ + acd->acd_conflict_callback(netif, ACD_IP_OK); + } + } + break; + + case ACD_STATE_RATE_LIMIT: + if (acd->ttw == 0) { + /* acd should be stopped because ipaddr isn't valid any more */ + acd_stop(acd); + /* let the acd user (after rate limit interval) know that their is + * a conflict detected. So it can restart the address acquiring + * process.*/ + acd->acd_conflict_callback(netif, ACD_RESTART_CLIENT); + } + break; + + default: + /* nothing to do in other states */ + break; + } + } + } +} + +/** + * Restarts the acd module + * + * The number of conflicts is increased and the upper layer is informed. + */ +static void +acd_restart(struct netif *netif, struct acd *acd) +{ + /* increase conflict counter. */ + acd->num_conflicts++; + + /* Decline the address */ + acd->acd_conflict_callback(netif, ACD_DECLINE); + + /* if we tried more then MAX_CONFLICTS we must limit our rate for + * acquiring and probing addresses. compliant to RFC 5227 Section 2.1.1 */ + if (acd->num_conflicts >= MAX_CONFLICTS) { + acd->state = ACD_STATE_RATE_LIMIT; + acd->ttw = (u16_t)(RATE_LIMIT_INTERVAL * ACD_TICKS_PER_SECOND); + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING, + ("acd_restart(): rate limiting initiated. too many conflicts\n")); + } + else { + /* acd should be stopped because ipaddr isn't valid any more */ + acd_stop(acd); + /* let the acd user know right away that their is a conflict detected. + * So it can restart the address acquiring process. */ + acd->acd_conflict_callback(netif, ACD_RESTART_CLIENT); + } +} + +/** + * Handles every incoming ARP Packet, called by etharp_input(). + * + * @param netif network interface to use for acd processing + * @param hdr Incoming ARP packet + */ +void +acd_arp_reply(struct netif *netif, struct etharp_hdr *hdr) +{ + struct acd *acd; + ip4_addr_t sipaddr, dipaddr; + struct eth_addr netifaddr; + SMEMCPY(netifaddr.addr, netif->hwaddr, ETH_HWADDR_LEN); + + /* Copy struct ip4_addr_wordaligned to aligned ip4_addr, to support + * compilers without structure packing (not using structure copy which + * breaks strict-aliasing rules). + */ + IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T(&sipaddr, &hdr->sipaddr); + IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T(&dipaddr, &hdr->dipaddr); + + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE, ("acd_arp_reply()\n")); + + /* loop over the acd's*/ + ACD_FOREACH(acd, netif->acd_list) { + switch(acd->state) { + case ACD_STATE_OFF: + case ACD_STATE_RATE_LIMIT: + default: + /* do nothing */ + break; + + case ACD_STATE_PROBE_WAIT: + case ACD_STATE_PROBING: + case ACD_STATE_ANNOUNCE_WAIT: + /* RFC 5227 Section 2.1.1: + * from beginning to after ANNOUNCE_WAIT seconds we have a conflict if + * ip.src == ipaddr (someone is already using the address) + * OR + * ip.dst == ipaddr && hw.src != own hwaddr (someone else is probing it) + */ + if ((ip4_addr_eq(&sipaddr, &acd->ipaddr)) || + (ip4_addr_isany_val(sipaddr) && + ip4_addr_eq(&dipaddr, &acd->ipaddr) && + !eth_addr_eq(&netifaddr, &hdr->shwaddr))) { + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING, + ("acd_arp_reply(): Probe Conflict detected\n")); + acd_restart(netif, acd); + } + break; + + case ACD_STATE_ANNOUNCING: + case ACD_STATE_ONGOING: + case ACD_STATE_PASSIVE_ONGOING: + /* RFC 5227 Section 2.4: + * in any state we have a conflict if + * ip.src == ipaddr && hw.src != own hwaddr (someone is using our address) + */ + if (ip4_addr_eq(&sipaddr, &acd->ipaddr) && + !eth_addr_eq(&netifaddr, &hdr->shwaddr)) { + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING, + ("acd_arp_reply(): Conflicting ARP-Packet detected\n")); + acd_handle_arp_conflict(netif, acd); + } + break; + } + } +} + +/** + * Handle a IP address conflict after an ARP conflict detection + */ +static void +acd_handle_arp_conflict(struct netif *netif, struct acd *acd) +{ + /* RFC5227, 2.4 "Ongoing Address Conflict Detection and Address Defense" + allows three options where: + a) means retreat on the first conflict, + b) allows to keep an already configured address when having only one + conflict in DEFEND_INTERVAL seconds and + c) the host will not give up it's address and defend it indefinitely + + We use option b) when the acd module represents the netif address, since it + helps to improve the chance that one of the two conflicting hosts may be + able to retain its address. while we are flexible enough to help network + performance + + We use option a) when the acd module does not represent the netif address, + since we cannot have the acd module announcing or restarting. This + situation occurs for the LL acd module when a routable address is used on + the netif but the LL address is still open in the background. */ + + if (acd->state == ACD_STATE_PASSIVE_ONGOING) { + /* Immediately back off on a conflict. */ + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_handle_arp_conflict(): conflict when we are in passive mode -> back off\n")); + acd_stop(acd); + acd->acd_conflict_callback(netif, ACD_DECLINE); + } + else { + if (acd->lastconflict > 0) { + /* retreat, there was a conflicting ARP in the last DEFEND_INTERVAL seconds */ + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_handle_arp_conflict(): conflict within DEFEND_INTERVAL -> retreating\n")); + + /* Active TCP sessions are aborted when removing the ip address but a bad + * connection was inevitable anyway with conflicting hosts */ + acd_restart(netif, acd); + } else { + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_handle_arp_conflict(): we are defending, send ARP Announce\n")); + etharp_acd_announce(netif, &acd->ipaddr); + acd->lastconflict = DEFEND_INTERVAL * ACD_TICKS_PER_SECOND; + } + } +} + +/** + * Put the acd module in passive ongoing conflict detection. + */ +static void +acd_put_in_passive_mode(struct netif *netif, struct acd *acd) +{ + switch(acd->state) { + case ACD_STATE_OFF: + case ACD_STATE_PASSIVE_ONGOING: + default: + /* do nothing */ + break; + + case ACD_STATE_PROBE_WAIT: + case ACD_STATE_PROBING: + case ACD_STATE_ANNOUNCE_WAIT: + case ACD_STATE_RATE_LIMIT: + acd_stop(acd); + acd->acd_conflict_callback(netif, ACD_DECLINE); + break; + + case ACD_STATE_ANNOUNCING: + case ACD_STATE_ONGOING: + acd->state = ACD_STATE_PASSIVE_ONGOING; + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_put_in_passive_mode()\n")); + break; + } +} + +/** + * @ingroup acd + * Inform the ACD modules of address changes + * + * @param netif network interface on which the address is changing + * @param old_addr old ip address + * @param new_addr new ip address + */ +void +acd_netif_ip_addr_changed(struct netif *netif, const ip_addr_t *old_addr, + const ip_addr_t *new_addr) +{ + struct acd *acd; + + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_netif_ip_addr_changed(): Address changed\n")); + + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_netif_ip_addr_changed(): old address = %s\n", ipaddr_ntoa(old_addr))); + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_netif_ip_addr_changed(): new address = %s\n", ipaddr_ntoa(new_addr))); + + /* If we change from ANY to an IP or from an IP to ANY we do nothing */ + if (ip_addr_isany(old_addr) || ip_addr_isany(new_addr)) { + return; + } + + ACD_FOREACH(acd, netif->acd_list) { + /* Find ACD module of old address */ + if(ip4_addr_eq(&acd->ipaddr, ip_2_ip4(old_addr))) { + /* Did we change from a LL address to a routable address? */ + if (ip_addr_islinklocal(old_addr) && !ip_addr_islinklocal(new_addr)) { + LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("acd_netif_ip_addr_changed(): changed from LL to routable address\n")); + /* Put the module in passive conflict detection mode */ + acd_put_in_passive_mode(netif, acd); + } + } + } +} + +#endif /* LWIP_IPV4 && LWIP_ACD */ diff --git a/lib/lwip/core/ipv4/autoip.c b/lib/lwip/core/ipv4/autoip.c new file mode 100644 index 0000000000..461a005338 --- /dev/null +++ b/lib/lwip/core/ipv4/autoip.c @@ -0,0 +1,379 @@ +/** + * @file + * AutoIP Automatic LinkLocal IP Configuration + * + * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform + * with RFC 3927. It uses IPv4 address conflict detection to evaluate the chosen + * address. The ACD module aims to be conform to RFC 5227. + * RFC 5227 is extracted out of RFC 3927 so the acd module fits nicely in autoip. + * + * @defgroup autoip AUTOIP + * @ingroup ip4 + * AUTOIP related functions + * USAGE: + * + * define @ref LWIP_AUTOIP 1 in your lwipopts.h + * + * Without DHCP: + * - Call autoip_start() after netif_add(). + * + * With DHCP: + * - define @ref LWIP_DHCP_AUTOIP_COOP 1 in your lwipopts.h. + * - Configure your DHCP Client. + * + * @see netifapi_autoip + */ + +/* + * + * Copyright (c) 2007 Dominik Spies kontakt@dspies.de + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dominik Spies kontakt@dspies.de + */ + +#include "lwip/opt.h" + +#if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/mem.h" +/* #include "lwip/udp.h" */ +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/autoip.h" +#include "lwip/acd.h" +#include "lwip/etharp.h" +#include "lwip/prot/autoip.h" + +#include <string.h> + +/** + * Macro that generates the initial IP address to be tried by AUTOIP. + * If you want to override this, define it to something else in lwipopts.h. + */ +#ifndef LWIP_AUTOIP_CREATE_SEED_ADDR +#define LWIP_AUTOIP_CREATE_SEED_ADDR(netif) \ + lwip_htonl(AUTOIP_RANGE_START + ((u32_t)(((u8_t)(netif->hwaddr[4])) | \ + ((u32_t)((u8_t)(netif->hwaddr[5]))) << 8))) +#endif /* LWIP_AUTOIP_CREATE_SEED_ADDR */ + +/* Function definitions */ +static void autoip_restart(struct netif *netif); +static void autoip_create_addr(struct netif *netif, ip4_addr_t *ipaddr); +static err_t autoip_bind(struct netif *netif); +static void autoip_conflict_callback(struct netif *netif, + acd_callback_enum_t state); + +/** + * @ingroup autoip + * Set a statically allocated struct autoip to work with. + * Using this prevents autoip_start to allocate it using mem_malloc. + * + * @param netif the netif for which to set the struct autoip + * @param autoip (uninitialised) autoip struct allocated by the application + */ +void +autoip_set_struct(struct netif *netif, struct autoip *autoip) +{ + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_ASSERT("autoip != NULL", autoip != NULL); + LWIP_ASSERT("netif already has a struct autoip set", + netif_autoip_data(netif) == NULL); + + /* clear data structure */ + memset(autoip, 0, sizeof(struct autoip)); + /* autoip->state = AUTOIP_STATE_OFF; */ + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP, autoip); +} + +/** + * @ingroup autoip + * Remove a struct autoip previously set to the netif using autoip_set_struct() + * + * @param netif the netif for which to set the struct autoip + */ +void +autoip_remove_struct(struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_ASSERT("netif has no struct autoip set", + netif_autoip_data(netif) != NULL); + + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP, NULL); +} + +/** Restart AutoIP client and check the next address (conflict detected) + * + * @param netif The netif under AutoIP control + */ +static void +autoip_restart(struct netif *netif) +{ + struct autoip *autoip = netif_autoip_data(netif); + autoip->tried_llipaddr++; + autoip_start(netif); +} + + +/** + * Create an IP-Address out of range 169.254.1.0 to 169.254.254.255 + * + * @param netif network interface on which create the IP-Address + * @param ipaddr ip address to initialize + */ +static void +autoip_create_addr(struct netif *netif, ip4_addr_t *ipaddr) +{ + struct autoip *autoip = netif_autoip_data(netif); + + /* Here we create an IP-Address out of range 169.254.1.0 to 169.254.254.255 + * compliant to RFC 3927 Section 2.1 + * We have 254 * 256 possibilities */ + + u32_t addr = lwip_ntohl(LWIP_AUTOIP_CREATE_SEED_ADDR(netif)); + addr += autoip->tried_llipaddr; + addr = AUTOIP_NET | (addr & 0xffff); + /* Now, 169.254.0.0 <= addr <= 169.254.255.255 */ + + if (addr < AUTOIP_RANGE_START) { + addr += AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1; + } + if (addr > AUTOIP_RANGE_END) { + addr -= AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1; + } + LWIP_ASSERT("AUTOIP address not in range", (addr >= AUTOIP_RANGE_START) && + (addr <= AUTOIP_RANGE_END)); + ip4_addr_set_u32(ipaddr, lwip_htonl(addr)); + + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("autoip_create_addr(): tried_llipaddr=%"U16_F", %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + (u16_t)(autoip->tried_llipaddr), ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), + ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr))); +} + + +/** + * Configure interface for use with current LL IP-Address + * + * @param netif network interface to configure with current LL IP-Address + */ +static err_t +autoip_bind(struct netif *netif) +{ + struct autoip *autoip = netif_autoip_data(netif); + ip4_addr_t sn_mask, gw_addr; + + autoip->state = AUTOIP_STATE_BOUND; + + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, + ("autoip_bind(netif=%p) %c%c%"U16_F" %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num, + ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr), + ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr))); + + IP4_ADDR(&sn_mask, 255, 255, 0, 0); + IP4_ADDR(&gw_addr, 0, 0, 0, 0); + + netif_set_addr(netif, &autoip->llipaddr, &sn_mask, &gw_addr); + /* interface is used by routing now that an address is set */ + + return ERR_OK; +} + +/** +* Handle conflict information from ACD module +* +* @param netif network interface to handle conflict information on +* @param state acd_callback_enum_t + */ +static void +autoip_conflict_callback(struct netif *netif, acd_callback_enum_t state) +{ + struct autoip *autoip = netif_autoip_data(netif); + + switch (state) { + case ACD_IP_OK: + autoip_bind(netif); + break; + case ACD_RESTART_CLIENT: + autoip_restart(netif); + break; + case ACD_DECLINE: + /* "delete" conflicting address so a new one will be selected in + * autoip_start() */ + ip4_addr_set_any(&autoip->llipaddr); + autoip_stop(netif); + break; + default: + break; + } +} + +/** + * @ingroup autoip + * Start AutoIP client + * + * @param netif network interface on which start the AutoIP client + */ +err_t +autoip_start(struct netif *netif) +{ + struct autoip *autoip = netif_autoip_data(netif); + err_t result = ERR_OK; + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ERROR("netif is not up, old style port?", netif_is_up(netif), return ERR_ARG;); + + if (autoip == NULL) { + /* no AutoIP client attached yet? */ + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, + ("autoip_start(): starting new AUTOIP client\n")); + autoip = (struct autoip *)mem_calloc(1, sizeof(struct autoip)); + if (autoip == NULL) { + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, + ("autoip_start(): could not allocate autoip\n")); + return ERR_MEM; + } + /* store this AutoIP client in the netif */ + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP, autoip); + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_start(): allocated autoip\n")); + } + + if (autoip->state == AUTOIP_STATE_OFF) { + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("autoip_start(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0], + netif->name[1], (u16_t)netif->num)); + + /* add acd struct to list*/ + acd_add(netif, &autoip->acd, autoip_conflict_callback); + + /* In accordance to RFC3927 section 2.1: + * Keep using the same link local address as much as possible. + * Only when there is none or when there was a conflict, select a new one. + */ + if (!ip4_addr_islinklocal(&autoip->llipaddr)) { + autoip_create_addr(netif, &(autoip->llipaddr)); + } + autoip->state = AUTOIP_STATE_CHECKING; + acd_start(netif, &autoip->acd, autoip->llipaddr); + } else { + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("autoip_start(): already started on netif=%p %c%c%"U16_F"\n", + (void *)netif, netif->name[0], + netif->name[1], (u16_t)netif->num)); + } + + return result; +} + + +/** + * Handle a possible change in the network configuration: link up + * + * If there is an AutoIP address configured and AutoIP is not in cooperation + * with DHCP, start probing for previous address. + */ +void +autoip_network_changed_link_up(struct netif *netif) +{ + struct autoip *autoip = netif_autoip_data(netif); + + if (autoip && (autoip->state != AUTOIP_STATE_OFF) && !LWIP_DHCP_AUTOIP_COOP) { + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, + ("autoip_network_changed_link_up(): start acd\n")); + autoip->state = AUTOIP_STATE_CHECKING; + /* Start acd check again for the last used address */ + acd_start(netif, &autoip->acd, autoip->llipaddr); + } +} + +/** + * Handle a possible change in the network configuration: link down + * + * If there is an AutoIP address configured and AutoIP is in cooperation + * with DHCP, then stop the autoip module. When the link goes up, we do not want + * the autoip module to start again. DHCP will initiate autoip when needed. + */ +void +autoip_network_changed_link_down(struct netif *netif) +{ + struct autoip *autoip = netif_autoip_data(netif); + + if (autoip && (autoip->state != AUTOIP_STATE_OFF) && LWIP_DHCP_AUTOIP_COOP) { + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, + ("autoip_network_changed_link_down(): stop autoip\n")); + autoip_stop(netif); + } +} + +/** + * @ingroup autoip + * Stop AutoIP client + * + * @param netif network interface on which stop the AutoIP client + */ +err_t +autoip_stop(struct netif *netif) +{ + struct autoip *autoip = netif_autoip_data(netif); + + LWIP_ASSERT_CORE_LOCKED(); + if (autoip != NULL) { + autoip->state = AUTOIP_STATE_OFF; + if (ip4_addr_islinklocal(netif_ip4_addr(netif))) { + netif_set_addr(netif, IP4_ADDR_ANY4, IP4_ADDR_ANY4, IP4_ADDR_ANY4); + } + LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,("autoip_stop()\n")); + } + return ERR_OK; +} + +/** check if AutoIP supplied netif->ip_addr + * + * @param netif the netif to check + * @return 1 if AutoIP supplied netif->ip_addr (state BOUND), + * 0 otherwise + */ +u8_t +autoip_supplied_address(struct netif *netif) +{ + struct autoip *autoip = netif_autoip_data(netif); + return (autoip != NULL) + && (ip4_addr_eq(netif_ip4_addr(netif), &(autoip->llipaddr))) + && (autoip->state == AUTOIP_STATE_BOUND); +} + +u8_t +autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr) +{ + struct autoip *autoip = netif_autoip_data(netif); + return (autoip != NULL) + && (ip4_addr_eq(addr, &(autoip->llipaddr))) + && (autoip->state == AUTOIP_STATE_BOUND); +} + +#endif /* LWIP_IPV4 && LWIP_AUTOIP */ diff --git a/lib/lwip/core/ipv4/dhcp.c b/lib/lwip/core/ipv4/dhcp.c new file mode 100644 index 0000000000..d9ed8b0f37 --- /dev/null +++ b/lib/lwip/core/ipv4/dhcp.c @@ -0,0 +1,1999 @@ +/** + * @file + * Dynamic Host Configuration Protocol client + * + * @defgroup dhcp4 DHCPv4 + * @ingroup ip4 + * DHCP (IPv4) related functions + * This is a DHCP client for the lwIP TCP/IP stack. It aims to conform + * with RFC 2131 and RFC 2132. + * + * @todo: + * - Support for interfaces other than Ethernet (SLIP, PPP, ...) + * + * Options: + * @ref DHCP_COARSE_TIMER_SECS (recommended 60 which is a minute) + * @ref DHCP_FINE_TIMER_MSECS (recommended 500 which equals TCP coarse timer) + * + * dhcp_start() starts a DHCP client instance which + * configures the interface by obtaining an IP address lease and maintaining it. + * + * Use dhcp_release() to end the lease and use dhcp_stop() + * to remove the DHCP client. + * + * @see LWIP_HOOK_DHCP_APPEND_OPTIONS + * @see LWIP_HOOK_DHCP_PARSE_OPTION + * + * @see netifapi_dhcp4 + */ + +/* + * Copyright (c) 2001-2004 Leon Woestenberg leon.woestenberg@gmx.net + * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * The Swedish Institute of Computer Science and Adam Dunkels + * are specifically granted permission to redistribute this + * source code. + * + * Author: Leon Woestenberg leon.woestenberg@gmx.net + * + */ + +#include "lwip/opt.h" + +#if LWIP_IPV4 && LWIP_DHCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/stats.h" +#include "lwip/mem.h" +#include "lwip/udp.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/def.h" +#include "lwip/dhcp.h" +#include "lwip/autoip.h" +#include "lwip/acd.h" +#include "lwip/dns.h" +#include "lwip/etharp.h" +#include "lwip/prot/dhcp.h" +#include "lwip/prot/iana.h" + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif +#ifndef LWIP_HOOK_DHCP_APPEND_OPTIONS +#define LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, state, msg, msg_type, options_len_ptr) +#endif +#ifndef LWIP_HOOK_DHCP_PARSE_OPTION +#define LWIP_HOOK_DHCP_PARSE_OPTION(netif, dhcp, state, msg, msg_type, option, len, pbuf, offset) do { LWIP_UNUSED_ARG(msg); } while(0) +#endif + +/** DHCP_ADD_EXTRA_REQUEST_OPTIONS: Additional options added to the list of options + * that the client requests from the servers (opt 55: DHCP_OPTION_PARAMETER_REQUEST_LIST) + * If additional options are requested, define this macro as a comma separated list, with leading comma. + * This macro is useful for example when requested vendor specific ids (VCI/VSI options), here is an example + * of requesting the VSI option (option 43) (yes, the notation is a bit strange, but it works :) + * (NOTE: the space between # and define is required because of doxygen...) + * # define DHCP_ADD_EXTRA_REQUEST_OPTIONS ,43 + */ +#ifndef DHCP_ADD_EXTRA_REQUEST_OPTIONS +#define DHCP_ADD_EXTRA_REQUEST_OPTIONS +#endif + +/** DHCP_DEFINE_CUSTOM_TIMEOUTS: if this is defined then you can customize various DHCP timeouts using these macros: + - DHCP_SET_TIMEOUT_FROM_OFFERED_T0_LEASE() to adjust the t0 lease timeout from the offered value + - DHCP_SET_TIMEOUT_FROM_OFFERED_T1_RENEW() same for t1 renew + - DHCP_SET_TIMEOUT_FROM_OFFERED_T2_REBIND() same for t2 rebind + - DHCP_NEXT_TIMEOUT_THRESHOLD to adjust the period of the next timeout + - DHCP_REQUEST_BACKOFF_SEQUENCE to adjust back-off times based on DHCP request attempts + */ +#ifndef DHCP_DEFINE_CUSTOM_TIMEOUTS +#define SET_TIMEOUT_FROM_OFFERED(result, offered, min, max) do { \ + u32_t timeout = (offered + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS; \ + if (timeout > max) { \ + timeout = max; \ + } \ + if (timeout == min) { \ + timeout = 1; \ + } \ + result = (dhcp_timeout_t)timeout; \ +} while(0) + +#define DHCP_SET_TIMEOUT_FROM_OFFERED_T0_LEASE(res, dhcp) SET_TIMEOUT_FROM_OFFERED(res, (dhcp)->offered_t0_lease, 0, 0xffff) +#define DHCP_SET_TIMEOUT_FROM_OFFERED_T1_RENEW(res, dhcp) SET_TIMEOUT_FROM_OFFERED(res, (dhcp)->offered_t1_renew, 0, 0xffff) +#define DHCP_SET_TIMEOUT_FROM_OFFERED_T2_REBIND(res, dhcp) SET_TIMEOUT_FROM_OFFERED(res, (dhcp)->offered_t2_rebind, 0, 0xffff) + +#define DHCP_NEXT_TIMEOUT_THRESHOLD ((60 + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS) +#define DHCP_REQUEST_BACKOFF_SEQUENCE(tries) (u16_t)(( (tries) < 6 ? 1 << (tries) : 60) * 1000) + +#endif /* DHCP_DEFINE_CUSTOM_TIMEOUTS */ + +/** DHCP_CREATE_RAND_XID: if this is set to 1, the xid is created using + * LWIP_RAND() (this overrides DHCP_GLOBAL_XID) + */ +#ifndef DHCP_CREATE_RAND_XID +#define DHCP_CREATE_RAND_XID 1 +#endif + +/** Default for DHCP_GLOBAL_XID is 0xABCD0000 + * This can be changed by defining DHCP_GLOBAL_XID and DHCP_GLOBAL_XID_HEADER, e.g. + * #define DHCP_GLOBAL_XID_HEADER "stdlib.h" + * #define DHCP_GLOBAL_XID rand() + */ +#ifdef DHCP_GLOBAL_XID_HEADER +#include DHCP_GLOBAL_XID_HEADER /* include optional starting XID generation prototypes */ +#endif + +/** DHCP_OPTION_MAX_MSG_SIZE is set to the MTU + * MTU is checked to be big enough in dhcp_start */ +#define DHCP_MAX_MSG_LEN(netif) (netif->mtu) +#define DHCP_MAX_MSG_LEN_MIN_REQUIRED 576 +/** Minimum length for reply before packet is parsed */ +#define DHCP_MIN_REPLY_LEN 44 + +#define REBOOT_TRIES 2 + +#if LWIP_DNS && LWIP_DHCP_MAX_DNS_SERVERS +#if DNS_MAX_SERVERS > LWIP_DHCP_MAX_DNS_SERVERS +#define LWIP_DHCP_PROVIDE_DNS_SERVERS LWIP_DHCP_MAX_DNS_SERVERS +#else +#define LWIP_DHCP_PROVIDE_DNS_SERVERS DNS_MAX_SERVERS +#endif +#else +#define LWIP_DHCP_PROVIDE_DNS_SERVERS 0 +#endif + +#ifndef LWIP_DHCP_INPUT_ERROR +#define LWIP_DHCP_INPUT_ERROR(message, expression, handler) do { if (!(expression)) { \ + handler;} } while(0) +#endif + +/** Option handling: options are parsed in dhcp_parse_reply + * and saved in an array where other functions can load them from. + * This might be moved into the struct dhcp (not necessarily since + * lwIP is single-threaded and the array is only used while in recv + * callback). */ +enum dhcp_option_idx { + DHCP_OPTION_IDX_OVERLOAD = 0, + DHCP_OPTION_IDX_MSG_TYPE, + DHCP_OPTION_IDX_SERVER_ID, + DHCP_OPTION_IDX_LEASE_TIME, + DHCP_OPTION_IDX_T1, + DHCP_OPTION_IDX_T2, + DHCP_OPTION_IDX_SUBNET_MASK, + DHCP_OPTION_IDX_ROUTER, +#if LWIP_DHCP_PROVIDE_DNS_SERVERS + DHCP_OPTION_IDX_DNS_SERVER, + DHCP_OPTION_IDX_DNS_SERVER_LAST = DHCP_OPTION_IDX_DNS_SERVER + LWIP_DHCP_PROVIDE_DNS_SERVERS - 1, +#endif /* LWIP_DHCP_PROVIDE_DNS_SERVERS */ +#if LWIP_DHCP_GET_NTP_SRV + DHCP_OPTION_IDX_NTP_SERVER, + DHCP_OPTION_IDX_NTP_SERVER_LAST = DHCP_OPTION_IDX_NTP_SERVER + LWIP_DHCP_MAX_NTP_SERVERS - 1, +#endif /* LWIP_DHCP_GET_NTP_SRV */ + DHCP_OPTION_IDX_MAX +}; + +/** Holds the decoded option values, only valid while in dhcp_recv. + @todo: move this into struct dhcp? */ +static u32_t dhcp_rx_options_val[DHCP_OPTION_IDX_MAX]; +/** Holds a flag which option was received and is contained in dhcp_rx_options_val, + only valid while in dhcp_recv. + @todo: move this into struct dhcp? */ +static u8_t dhcp_rx_options_given[DHCP_OPTION_IDX_MAX]; + +static u8_t dhcp_discover_request_options[] = { + DHCP_OPTION_SUBNET_MASK, + DHCP_OPTION_ROUTER, + DHCP_OPTION_BROADCAST +#if LWIP_DHCP_PROVIDE_DNS_SERVERS + , DHCP_OPTION_DNS_SERVER +#endif /* LWIP_DHCP_PROVIDE_DNS_SERVERS */ +#if LWIP_DHCP_GET_NTP_SRV + , DHCP_OPTION_NTP +#endif /* LWIP_DHCP_GET_NTP_SRV */ + DHCP_ADD_EXTRA_REQUEST_OPTIONS +}; + +#ifdef DHCP_GLOBAL_XID +static u32_t xid; +static u8_t xid_initialised; +#endif /* DHCP_GLOBAL_XID */ + +#define dhcp_option_given(dhcp, idx) (dhcp_rx_options_given[idx] != 0) +#define dhcp_got_option(dhcp, idx) (dhcp_rx_options_given[idx] = 1) +#define dhcp_clear_option(dhcp, idx) (dhcp_rx_options_given[idx] = 0) +#define dhcp_clear_all_options(dhcp) (memset(dhcp_rx_options_given, 0, sizeof(dhcp_rx_options_given))) +#define dhcp_get_option_value(dhcp, idx) (dhcp_rx_options_val[idx]) +#define dhcp_set_option_value(dhcp, idx, val) (dhcp_rx_options_val[idx] = (val)) + +static struct udp_pcb *dhcp_pcb; +static u8_t dhcp_pcb_refcount; + +/* DHCP client state machine functions */ +static err_t dhcp_discover(struct netif *netif); +static err_t dhcp_select(struct netif *netif); +static void dhcp_bind(struct netif *netif); +#if LWIP_DHCP_DOES_ACD_CHECK +static err_t dhcp_decline(struct netif *netif); +#endif /* LWIP_DHCP_DOES_ACD_CHECK */ +static err_t dhcp_rebind(struct netif *netif); +static err_t dhcp_reboot(struct netif *netif); +static void dhcp_set_state(struct dhcp *dhcp, u8_t new_state); + +/* receive, unfold, parse and free incoming messages */ +static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port); + +/* set the DHCP timers */ +static void dhcp_timeout(struct netif *netif); +static void dhcp_t1_timeout(struct netif *netif); +static void dhcp_t2_timeout(struct netif *netif); + +/* build outgoing messages */ +/* create a DHCP message, fill in common headers */ +static struct pbuf *dhcp_create_msg(struct netif *netif, struct dhcp *dhcp, u8_t message_type, u16_t *options_out_len); +/* add a DHCP option (type, then length in bytes) */ +static u16_t dhcp_option(u16_t options_out_len, u8_t *options, u8_t option_type, u8_t option_len); +/* add option values */ +static u16_t dhcp_option_byte(u16_t options_out_len, u8_t *options, u8_t value); +static u16_t dhcp_option_short(u16_t options_out_len, u8_t *options, u16_t value); +static u16_t dhcp_option_long(u16_t options_out_len, u8_t *options, u32_t value); +#if LWIP_NETIF_HOSTNAME +static u16_t dhcp_option_hostname(u16_t options_out_len, u8_t *options, struct netif *netif); +#endif /* LWIP_NETIF_HOSTNAME */ +/* always add the DHCP options trailer to end and pad */ +static void dhcp_option_trailer(u16_t options_out_len, u8_t *options, struct pbuf *p_out); + +/** Ensure DHCP PCB is allocated and bound */ +static err_t +dhcp_inc_pcb_refcount(void) +{ + if (dhcp_pcb_refcount == 0) { + LWIP_ASSERT("dhcp_inc_pcb_refcount(): memory leak", dhcp_pcb == NULL); + + /* allocate UDP PCB */ + dhcp_pcb = udp_new(); + + if (dhcp_pcb == NULL) { + return ERR_MEM; + } + + ip_set_option(dhcp_pcb, SOF_BROADCAST); + + /* set up local and remote port for the pcb -> listen on all interfaces on all src/dest IPs */ + udp_bind(dhcp_pcb, IP4_ADDR_ANY, LWIP_IANA_PORT_DHCP_CLIENT); + udp_connect(dhcp_pcb, IP4_ADDR_ANY, LWIP_IANA_PORT_DHCP_SERVER); + udp_recv(dhcp_pcb, dhcp_recv, NULL); + } + + dhcp_pcb_refcount++; + + return ERR_OK; +} + +/** Free DHCP PCB if the last netif stops using it */ +static void +dhcp_dec_pcb_refcount(void) +{ + LWIP_ASSERT("dhcp_pcb_refcount(): refcount error", (dhcp_pcb_refcount > 0)); + dhcp_pcb_refcount--; + + if (dhcp_pcb_refcount == 0) { + udp_remove(dhcp_pcb); + dhcp_pcb = NULL; + } +} + +/** + * Back-off the DHCP client (because of a received NAK response). + * + * Back-off the DHCP client because of a received NAK. Receiving a + * NAK means the client asked for something non-sensible, for + * example when it tries to renew a lease obtained on another network. + * + * We clear any existing set IP address and restart DHCP negotiation + * afresh (as per RFC2131 3.2.3). + * + * @param netif the netif under DHCP control + */ +static void +dhcp_handle_nak(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_handle_nak(netif=%p) %c%c%"U16_F"\n", + (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num)); + /* Change to a defined state - set this before assigning the address + to ensure the callback can use dhcp_supplied_address() */ + dhcp_set_state(dhcp, DHCP_STATE_BACKING_OFF); + /* remove IP address from interface (must no longer be used, as per RFC2131) */ + netif_set_addr(netif, IP4_ADDR_ANY4, IP4_ADDR_ANY4, IP4_ADDR_ANY4); + /* We can immediately restart discovery */ + dhcp_discover(netif); +} + +#if LWIP_DHCP_DOES_ACD_CHECK +/** +* Handle conflict information from ACD module +* +* @param netif network interface to handle conflict information on +* @param state acd_callback_enum_t + */ +static void +dhcp_conflict_callback(struct netif *netif, acd_callback_enum_t state) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + u16_t msecs; + + LWIP_ASSERT("DHCP should be enabled at this point, but it is not!", + (dhcp != NULL) && (dhcp->state != DHCP_STATE_OFF)); + + switch (state) { + case ACD_IP_OK: + dhcp_bind(netif); + break; + case ACD_RESTART_CLIENT: + /* wait 10s before restarting + * According to RFC2131 section 3.1 point 5: + * If the client detects that the address is already in use (e.g., through + * the use of ARP), the client MUST send a DHCPDECLINE message to the + * server and restarts the configuration process. The client SHOULD wait + * a minimum of ten seconds before restarting the configuration process to + * avoid excessive network traffic in case of looping. */ + dhcp_set_state(dhcp, DHCP_STATE_BACKING_OFF); + msecs = 10 * 1000; + dhcp->request_timeout = (u16_t)((msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_decline(): set request timeout %"U16_F" msecs\n", msecs)); + break; + case ACD_DECLINE: + /* remove IP address from interface + * (prevents routing from selecting this interface) */ + netif_set_addr(netif, IP4_ADDR_ANY4, IP4_ADDR_ANY4, IP4_ADDR_ANY4); + /* Let the DHCP server know we will not use the address */ + dhcp_decline(netif); + break; + default: + break; + } +} + +/** + * Checks if the offered IP address is already in use. + * + * It does this according to the address conflict detection method described in + * RFC5227. + * + * @param netif the netif under DHCP control + */ +static void +dhcp_check(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_check(netif=%p) %c%c\n", (void *)netif, (s16_t)netif->name[0], + (s16_t)netif->name[1])); + dhcp_set_state(dhcp, DHCP_STATE_CHECKING); + + /* start ACD module */ + acd_start(netif, &dhcp->acd, dhcp->offered_ip_addr); +} +#endif /* LWIP_DHCP_DOES_ACD_CHECK */ + +/** + * Remember the configuration offered by a DHCP server. + * + * @param netif the netif under DHCP control + */ +static void +dhcp_handle_offer(struct netif *netif, struct dhcp_msg *msg_in) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_handle_offer(netif=%p) %c%c%"U16_F"\n", + (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num)); + /* obtain the server address */ + if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_SERVER_ID)) { + dhcp->request_timeout = 0; /* stop timer */ + + ip_addr_set_ip4_u32(&dhcp->server_ip_addr, lwip_htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_SERVER_ID))); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_handle_offer(): server 0x%08"X32_F"\n", + ip4_addr_get_u32(ip_2_ip4(&dhcp->server_ip_addr)))); + /* remember offered address */ + ip4_addr_copy(dhcp->offered_ip_addr, msg_in->yiaddr); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_handle_offer(): offer for 0x%08"X32_F"\n", + ip4_addr_get_u32(&dhcp->offered_ip_addr))); + + dhcp_select(netif); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, + ("dhcp_handle_offer(netif=%p) did not get server ID!\n", (void *)netif)); + } +} + +/** + * Select a DHCP server offer out of all offers. + * + * Simply select the first offer received. + * + * @param netif the netif under DHCP control + * @return lwIP specific error (see error.h) + */ +static err_t +dhcp_select(struct netif *netif) +{ + struct dhcp *dhcp; + err_t result; + u16_t msecs; + u8_t i; + struct pbuf *p_out; + u16_t options_out_len; + + LWIP_ERROR("dhcp_select: netif != NULL", (netif != NULL), return ERR_ARG;); + dhcp = netif_dhcp_data(netif); + LWIP_ERROR("dhcp_select: dhcp != NULL", (dhcp != NULL), return ERR_VAL;); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_select(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num)); + dhcp_set_state(dhcp, DHCP_STATE_REQUESTING); + + /* create and initialize the DHCP message header */ + p_out = dhcp_create_msg(netif, dhcp, DHCP_REQUEST, &options_out_len); + if (p_out != NULL) { + struct dhcp_msg *msg_out = (struct dhcp_msg *)p_out->payload; + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + options_out_len = dhcp_option_short(options_out_len, msg_out->options, DHCP_MAX_MSG_LEN(netif)); + + /* MUST request the offered IP address */ + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_REQUESTED_IP, 4); + options_out_len = dhcp_option_long(options_out_len, msg_out->options, lwip_ntohl(ip4_addr_get_u32(&dhcp->offered_ip_addr))); + + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_SERVER_ID, 4); + options_out_len = dhcp_option_long(options_out_len, msg_out->options, lwip_ntohl(ip4_addr_get_u32(ip_2_ip4(&dhcp->server_ip_addr)))); + + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_PARAMETER_REQUEST_LIST, LWIP_ARRAYSIZE(dhcp_discover_request_options)); + for (i = 0; i < LWIP_ARRAYSIZE(dhcp_discover_request_options); i++) { + options_out_len = dhcp_option_byte(options_out_len, msg_out->options, dhcp_discover_request_options[i]); + } + +#if LWIP_NETIF_HOSTNAME + options_out_len = dhcp_option_hostname(options_out_len, msg_out->options, netif); +#endif /* LWIP_NETIF_HOSTNAME */ + + LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, DHCP_STATE_REQUESTING, msg_out, DHCP_REQUEST, &options_out_len); + dhcp_option_trailer(options_out_len, msg_out->options, p_out); + + /* send broadcast to any DHCP server */ + result = udp_sendto_if_src(dhcp_pcb, p_out, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER, netif, IP4_ADDR_ANY); + pbuf_free(p_out); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_select: REQUESTING\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("dhcp_select: could not allocate DHCP request\n")); + result = ERR_MEM; + } + if (dhcp->tries < 255) { + dhcp->tries++; + } + msecs = (u16_t)((dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000); + dhcp->request_timeout = (u16_t)((msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_select(): set request timeout %"U16_F" msecs\n", msecs)); + return result; +} + +/** + * The DHCP timer that checks for lease renewal/rebind timeouts. + * Must be called once a minute (see @ref DHCP_COARSE_TIMER_SECS). + */ +void +dhcp_coarse_tmr(void) +{ + struct netif *netif; + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_coarse_tmr()\n")); + /* iterate through all network interfaces */ + NETIF_FOREACH(netif) { + /* only act on DHCP configured interfaces */ + struct dhcp *dhcp = netif_dhcp_data(netif); + if ((dhcp != NULL) && (dhcp->state != DHCP_STATE_OFF)) { + /* compare lease time to expire timeout */ + if (dhcp->t0_timeout && (++dhcp->lease_used == dhcp->t0_timeout)) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_coarse_tmr(): t0 timeout\n")); + /* this clients' lease time has expired */ + dhcp_release_and_stop(netif); + dhcp_start(netif); + /* timer is active (non zero), and triggers (zeroes) now? */ + } else if (dhcp->t2_rebind_time && (dhcp->t2_rebind_time-- == 1)) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_coarse_tmr(): t2 timeout\n")); + /* this clients' rebind timeout triggered */ + dhcp_t2_timeout(netif); + /* timer is active (non zero), and triggers (zeroes) now */ + } else if (dhcp->t1_renew_time && (dhcp->t1_renew_time-- == 1)) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_coarse_tmr(): t1 timeout\n")); + /* this clients' renewal timeout triggered */ + dhcp_t1_timeout(netif); + } + } + } +} + +/** + * DHCP transaction timeout handling (this function must be called every 500ms, + * see @ref DHCP_FINE_TIMER_MSECS). + * + * A DHCP server is expected to respond within a short period of time. + * This timer checks whether an outstanding DHCP request is timed out. + */ +void +dhcp_fine_tmr(void) +{ + struct netif *netif; + /* loop through netif's */ + NETIF_FOREACH(netif) { + struct dhcp *dhcp = netif_dhcp_data(netif); + /* only act on DHCP configured interfaces */ + if (dhcp != NULL) { + /* timer is active (non zero), and is about to trigger now */ + if (dhcp->request_timeout > 1) { + dhcp->request_timeout--; + } else if (dhcp->request_timeout == 1) { + dhcp->request_timeout--; + /* { dhcp->request_timeout == 0 } */ + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_fine_tmr(): request timeout\n")); + /* this client's request timeout triggered */ + dhcp_timeout(netif); + } + } + } +} + +/** + * A DHCP negotiation transaction, or ARP request, has timed out. + * + * The timer that was started with the DHCP or ARP request has + * timed out, indicating no response was received in time. + * + * @param netif the netif under DHCP control + */ +static void +dhcp_timeout(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_timeout()\n")); + /* back-off period has passed, or server selection timed out */ + if ((dhcp->state == DHCP_STATE_BACKING_OFF) || (dhcp->state == DHCP_STATE_SELECTING)) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_timeout(): restarting discovery\n")); + dhcp_discover(netif); + /* receiving the requested lease timed out */ + } else if (dhcp->state == DHCP_STATE_REQUESTING) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): REQUESTING, DHCP request timed out\n")); + if (dhcp->tries <= 5) { + dhcp_select(netif); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): REQUESTING, releasing, restarting\n")); + dhcp_release_and_stop(netif); + dhcp_start(netif); + } + } else if (dhcp->state == DHCP_STATE_REBOOTING) { + if (dhcp->tries < REBOOT_TRIES) { + dhcp_reboot(netif); + } else { + dhcp_discover(netif); + } + } +} + +/** + * The renewal period has timed out. + * + * @param netif the netif under DHCP control + */ +static void +dhcp_t1_timeout(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_t1_timeout()\n")); + if ((dhcp->state == DHCP_STATE_REQUESTING) || (dhcp->state == DHCP_STATE_BOUND) || + (dhcp->state == DHCP_STATE_RENEWING)) { + /* just retry to renew - note that the rebind timer (t2) will + * eventually time-out if renew tries fail. */ + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("dhcp_t1_timeout(): must renew\n")); + /* This slightly different to RFC2131: DHCPREQUEST will be sent from state + DHCP_STATE_RENEWING, not DHCP_STATE_BOUND */ + dhcp_renew(netif); + /* Calculate next timeout */ + if (((dhcp->t2_timeout - dhcp->lease_used) / 2) >= DHCP_NEXT_TIMEOUT_THRESHOLD) { + dhcp->t1_renew_time = (dhcp_timeout_t)((dhcp->t2_timeout - dhcp->lease_used) / 2); + } + } +} + +/** + * The rebind period has timed out. + * + * @param netif the netif under DHCP control + */ +static void +dhcp_t2_timeout(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_t2_timeout()\n")); + if ((dhcp->state == DHCP_STATE_REQUESTING) || (dhcp->state == DHCP_STATE_BOUND) || + (dhcp->state == DHCP_STATE_RENEWING) || (dhcp->state == DHCP_STATE_REBINDING)) { + /* just retry to rebind */ + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + ("dhcp_t2_timeout(): must rebind\n")); + /* This slightly different to RFC2131: DHCPREQUEST will be sent from state + DHCP_STATE_REBINDING, not DHCP_STATE_BOUND */ + dhcp_rebind(netif); + /* Calculate next timeout */ + if (((dhcp->t0_timeout - dhcp->lease_used) / 2) >= DHCP_NEXT_TIMEOUT_THRESHOLD) { + dhcp->t2_rebind_time = (dhcp_timeout_t)((dhcp->t0_timeout - dhcp->lease_used) / 2); + } + } +} + +/** + * Handle a DHCP ACK packet + * + * @param netif the netif under DHCP control + */ +static void +dhcp_handle_ack(struct netif *netif, struct dhcp_msg *msg_in) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + +#if LWIP_DHCP_PROVIDE_DNS_SERVERS || LWIP_DHCP_GET_NTP_SRV + u8_t n; +#endif /* LWIP_DHCP_PROVIDE_DNS_SERVERS || LWIP_DHCP_GET_NTP_SRV */ +#if LWIP_DHCP_GET_NTP_SRV + ip4_addr_t ntp_server_addrs[LWIP_DHCP_MAX_NTP_SERVERS]; +#endif + + /* clear options we might not get from the ACK */ + ip4_addr_set_zero(&dhcp->offered_sn_mask); + ip4_addr_set_zero(&dhcp->offered_gw_addr); +#if LWIP_DHCP_BOOTP_FILE + ip4_addr_set_zero(&dhcp->offered_si_addr); +#endif /* LWIP_DHCP_BOOTP_FILE */ + + /* lease time given? */ + if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_LEASE_TIME)) { + /* remember offered lease time */ + dhcp->offered_t0_lease = dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_LEASE_TIME); + } + /* renewal period given? */ + if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_T1)) { + /* remember given renewal period */ + dhcp->offered_t1_renew = dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_T1); + } else { + /* calculate safe periods for renewal */ + dhcp->offered_t1_renew = dhcp->offered_t0_lease / 2; + } + + /* renewal period given? */ + if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_T2)) { + /* remember given rebind period */ + dhcp->offered_t2_rebind = dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_T2); + } else { + /* calculate safe periods for rebinding (offered_t0_lease * 0.875 -> 87.5%)*/ + dhcp->offered_t2_rebind = (dhcp->offered_t0_lease * 7U) / 8U; + } + + /* (y)our internet address */ + ip4_addr_copy(dhcp->offered_ip_addr, msg_in->yiaddr); + +#if LWIP_DHCP_BOOTP_FILE + /* copy boot server address, + boot file name copied in dhcp_parse_reply if not overloaded */ + ip4_addr_copy(dhcp->offered_si_addr, msg_in->siaddr); +#endif /* LWIP_DHCP_BOOTP_FILE */ + + /* subnet mask given? */ + if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_SUBNET_MASK)) { + /* remember given subnet mask */ + ip4_addr_set_u32(&dhcp->offered_sn_mask, lwip_htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_SUBNET_MASK))); + dhcp->flags |= DHCP_FLAG_SUBNET_MASK_GIVEN; + } else { + dhcp->flags &= ~DHCP_FLAG_SUBNET_MASK_GIVEN; + } + + /* gateway router */ + if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_ROUTER)) { + ip4_addr_set_u32(&dhcp->offered_gw_addr, lwip_htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_ROUTER))); + } + +#if LWIP_DHCP_GET_NTP_SRV + /* NTP servers */ + for (n = 0; (n < LWIP_DHCP_MAX_NTP_SERVERS) && dhcp_option_given(dhcp, DHCP_OPTION_IDX_NTP_SERVER + n); n++) { + ip4_addr_set_u32(&ntp_server_addrs[n], lwip_htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_NTP_SERVER + n))); + } + dhcp_set_ntp_servers(n, ntp_server_addrs); +#endif /* LWIP_DHCP_GET_NTP_SRV */ + +#if LWIP_DHCP_PROVIDE_DNS_SERVERS + /* DNS servers */ + for (n = 0; (n < LWIP_DHCP_PROVIDE_DNS_SERVERS) && dhcp_option_given(dhcp, DHCP_OPTION_IDX_DNS_SERVER + n); n++) { + ip_addr_t dns_addr; + ip_addr_set_ip4_u32_val(dns_addr, lwip_htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_DNS_SERVER + n))); + dns_setserver(n, &dns_addr); + } +#endif /* LWIP_DHCP_PROVIDE_DNS_SERVERS */ +} + +/** + * @ingroup dhcp4 + * Set a statically allocated struct dhcp to work with. + * Using this prevents dhcp_start to allocate it using mem_malloc. + * + * @param netif the netif for which to set the struct dhcp + * @param dhcp (uninitialised) dhcp struct allocated by the application + */ +void +dhcp_set_struct(struct netif *netif, struct dhcp *dhcp) +{ + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_ASSERT("dhcp != NULL", dhcp != NULL); + LWIP_ASSERT("netif already has a struct dhcp set", netif_dhcp_data(netif) == NULL); + + /* clear data structure */ + memset(dhcp, 0, sizeof(struct dhcp)); + /* mark this as externally allocated */ + dhcp->flags |= DHCP_FLAG_EXTERNAL_MEM; + /* dhcp_set_state(&dhcp, DHCP_STATE_OFF); */ + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, dhcp); +} + +/** + * @ingroup dhcp4 + * Removes a struct dhcp from a netif. + * + * ATTENTION: Only use this when not using dhcp_set_struct() to allocate the + * struct dhcp since the memory is passed back to the heap. + * + * @param netif the netif from which to remove the struct dhcp + */ +void dhcp_cleanup(struct netif *netif) +{ + struct dhcp *dhcp; + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("netif != NULL", netif != NULL); + + dhcp = netif_dhcp_data(netif); + if (dhcp != NULL) { + if (!(dhcp->flags & DHCP_FLAG_EXTERNAL_MEM)) { + mem_free(dhcp); + } + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, NULL); + } +} + +/** + * @ingroup dhcp4 + * Start DHCP negotiation for a network interface. + * + * If no DHCP client instance was attached to this interface, + * a new client is created first. If a DHCP client instance + * was already present, it restarts negotiation. + * + * @param netif The lwIP network interface + * @return lwIP error code + * - ERR_OK - No error + * - ERR_MEM - Out of memory + */ +err_t +dhcp_start(struct netif *netif) +{ + struct dhcp *dhcp; + err_t result; + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ERROR("netif != NULL", (netif != NULL), return ERR_ARG;); + LWIP_ERROR("netif is not up, old style port?", netif_is_up(netif), return ERR_ARG;); + dhcp = netif_dhcp_data(netif); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_start(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num)); + + /* check MTU of the netif */ + if (netif->mtu < DHCP_MAX_MSG_LEN_MIN_REQUIRED) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): Cannot use this netif with DHCP: MTU is too small\n")); + return ERR_MEM; + } + + /* no DHCP client attached yet? */ + if (dhcp == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): mallocing new DHCP client\n")); + dhcp = (struct dhcp *)mem_malloc(sizeof(struct dhcp)); + if (dhcp == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): could not allocate dhcp\n")); + return ERR_MEM; + } + + /* store this dhcp client in the netif */ + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, dhcp); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): allocated dhcp\n")); + /* already has DHCP client attached */ + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_start(): restarting DHCP configuration\n")); + + if (dhcp->pcb_allocated != 0) { + dhcp_dec_pcb_refcount(); /* free DHCP PCB if not needed any more */ + } + /* dhcp is cleared below, no need to reset flag*/ + } + + /* clear data structure */ + memset(dhcp, 0, sizeof(struct dhcp)); + /* dhcp_set_state(&dhcp, DHCP_STATE_OFF); */ + + +#if LWIP_DHCP_DOES_ACD_CHECK + /* add acd struct to list*/ + acd_add(netif, &dhcp->acd, dhcp_conflict_callback); +#endif /* LWIP_DHCP_DOES_ACD_CHECK */ + + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): starting DHCP configuration\n")); + + if (dhcp_inc_pcb_refcount() != ERR_OK) { /* ensure DHCP PCB is allocated */ + return ERR_MEM; + } + dhcp->pcb_allocated = 1; + + if (!netif_is_link_up(netif)) { + /* set state INIT and wait for dhcp_network_changed() to call dhcp_discover() */ + dhcp_set_state(dhcp, DHCP_STATE_INIT); + return ERR_OK; + } + + /* (re)start the DHCP negotiation */ + result = dhcp_discover(netif); + if (result != ERR_OK) { + /* free resources allocated above */ + dhcp_release_and_stop(netif); + return ERR_MEM; + } + return result; +} + +/** + * @ingroup dhcp4 + * Inform a DHCP server of our manual configuration. + * + * This informs DHCP servers of our fixed IP address configuration + * by sending an INFORM message. It does not involve DHCP address + * configuration, it is just here to be nice to the network. + * + * @param netif The lwIP network interface + */ +void +dhcp_inform(struct netif *netif) +{ + struct dhcp dhcp; + struct pbuf *p_out; + u16_t options_out_len; + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ERROR("netif != NULL", (netif != NULL), return;); + + if (dhcp_inc_pcb_refcount() != ERR_OK) { /* ensure DHCP PCB is allocated */ + return; + } + + memset(&dhcp, 0, sizeof(struct dhcp)); + dhcp_set_state(&dhcp, DHCP_STATE_INFORMING); + + /* create and initialize the DHCP message header */ + p_out = dhcp_create_msg(netif, &dhcp, DHCP_INFORM, &options_out_len); + if (p_out != NULL) { + struct dhcp_msg *msg_out = (struct dhcp_msg *)p_out->payload; + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + options_out_len = dhcp_option_short(options_out_len, msg_out->options, DHCP_MAX_MSG_LEN(netif)); + + LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, &dhcp, DHCP_STATE_INFORMING, msg_out, DHCP_INFORM, &options_out_len); + dhcp_option_trailer(options_out_len, msg_out->options, p_out); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_inform: INFORMING\n")); + + udp_sendto_if(dhcp_pcb, p_out, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER, netif); + + pbuf_free(p_out); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_inform: could not allocate DHCP request\n")); + } + + dhcp_dec_pcb_refcount(); /* delete DHCP PCB if not needed any more */ +} + +/** Handle a possible change in the network configuration. + * + * This enters the REBOOTING state to verify that the currently bound + * address is still valid. + */ +void +dhcp_network_changed_link_up(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + + if (!dhcp) { + return; + } + switch (dhcp->state) { + case DHCP_STATE_REBINDING: + case DHCP_STATE_RENEWING: + case DHCP_STATE_BOUND: + case DHCP_STATE_REBOOTING: + dhcp->tries = 0; + dhcp_reboot(netif); + break; + case DHCP_STATE_OFF: + /* stay off */ + break; + default: + LWIP_ASSERT("invalid dhcp->state", dhcp->state <= DHCP_STATE_BACKING_OFF); + /* INIT/REQUESTING/CHECKING/BACKING_OFF restart with new 'rid' because the + state changes, SELECTING: continue with current 'rid' as we stay in the + same state */ + /* ensure we start with short timeouts, even if already discovering */ + dhcp->tries = 0; + dhcp_discover(netif); + break; + } +} + +#if LWIP_DHCP_DOES_ACD_CHECK +/** + * Decline an offered lease. + * + * Tell the DHCP server we do not accept the offered address. + * One reason to decline the lease is when we find out the address + * is already in use by another host (through ARP). + * + * @param netif the netif under DHCP control + */ +static err_t +dhcp_decline(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + err_t result; + struct pbuf *p_out; + u16_t options_out_len; + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_decline()\n")); + dhcp_set_state(dhcp, DHCP_STATE_BACKING_OFF); + + /* create and initialize the DHCP message header */ + p_out = dhcp_create_msg(netif, dhcp, DHCP_DECLINE, &options_out_len); + if (p_out != NULL) { + struct dhcp_msg *msg_out = (struct dhcp_msg *)p_out->payload; + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_REQUESTED_IP, 4); + options_out_len = dhcp_option_long(options_out_len, msg_out->options, lwip_ntohl(ip4_addr_get_u32(&dhcp->offered_ip_addr))); + + LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, DHCP_STATE_BACKING_OFF, msg_out, DHCP_DECLINE, &options_out_len); + dhcp_option_trailer(options_out_len, msg_out->options, p_out); + + /* per section 4.4.4, broadcast DECLINE messages */ + result = udp_sendto_if_src(dhcp_pcb, p_out, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER, netif, IP4_ADDR_ANY); + pbuf_free(p_out); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_decline: BACKING OFF\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, + ("dhcp_decline: could not allocate DHCP request\n")); + result = ERR_MEM; + } + return result; +} +#endif /* LWIP_DHCP_DOES_ACD_CHECK */ + + +/** + * Start the DHCP process, discover a DHCP server. + * + * @param netif the netif under DHCP control + */ +static err_t +dhcp_discover(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + err_t result = ERR_OK; + u16_t msecs; + u8_t i; + struct pbuf *p_out; + u16_t options_out_len; + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover()\n")); + +#if LWIP_DHCP_AUTOIP_COOP + if (dhcp->tries >= LWIP_DHCP_AUTOIP_COOP_TRIES) { + autoip_start(netif); + } +#endif /* LWIP_DHCP_AUTOIP_COOP */ + + ip4_addr_set_any(&dhcp->offered_ip_addr); + dhcp_set_state(dhcp, DHCP_STATE_SELECTING); + /* create and initialize the DHCP message header */ + p_out = dhcp_create_msg(netif, dhcp, DHCP_DISCOVER, &options_out_len); + if (p_out != NULL) { + struct dhcp_msg *msg_out = (struct dhcp_msg *)p_out->payload; + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: making request\n")); + + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + options_out_len = dhcp_option_short(options_out_len, msg_out->options, DHCP_MAX_MSG_LEN(netif)); + +#if LWIP_NETIF_HOSTNAME && LWIP_DHCP_DISCOVER_ADD_HOSTNAME + options_out_len = dhcp_option_hostname(options_out_len, msg_out->options, netif); +#endif /* LWIP NETIF HOSTNAME && LWIP_DHCP_DISCOVER_ADD_HOSTNAME */ + + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_PARAMETER_REQUEST_LIST, LWIP_ARRAYSIZE(dhcp_discover_request_options)); + for (i = 0; i < LWIP_ARRAYSIZE(dhcp_discover_request_options); i++) { + options_out_len = dhcp_option_byte(options_out_len, msg_out->options, dhcp_discover_request_options[i]); + } + LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, DHCP_STATE_SELECTING, msg_out, DHCP_DISCOVER, &options_out_len); + dhcp_option_trailer(options_out_len, msg_out->options, p_out); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: sendto(DISCOVER, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER)\n")); + udp_sendto_if_src(dhcp_pcb, p_out, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER, netif, IP4_ADDR_ANY); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: deleting()\n")); + pbuf_free(p_out); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover: SELECTING\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_discover: could not allocate DHCP request\n")); + } + + if (dhcp->tries < 255) { + dhcp->tries++; + } + msecs = DHCP_REQUEST_BACKOFF_SEQUENCE(dhcp->tries); + dhcp->request_timeout = (u16_t)((msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover(): set request timeout %"U16_F" msecs\n", msecs)); + return result; +} + + +/** + * Bind the interface to the offered IP address. + * + * @param netif network interface to bind to the offered address + */ +static void +dhcp_bind(struct netif *netif) +{ + struct dhcp *dhcp; + ip4_addr_t sn_mask, gw_addr; + LWIP_ERROR("dhcp_bind: netif != NULL", (netif != NULL), return;); + dhcp = netif_dhcp_data(netif); + LWIP_ERROR("dhcp_bind: dhcp != NULL", (dhcp != NULL), return;); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num)); + + /* reset time used of lease */ + dhcp->lease_used = 0; + + if (dhcp->offered_t0_lease != 0xffffffffUL) { + /* set renewal period timer */ + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(): t0 renewal timer %"U32_F" secs\n", dhcp->offered_t0_lease)); + DHCP_SET_TIMEOUT_FROM_OFFERED_T0_LEASE(dhcp->t0_timeout, dhcp); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_bind(): set request timeout %"U32_F" msecs\n", dhcp->offered_t0_lease * 1000)); + } + + /* temporary DHCP lease? */ + if (dhcp->offered_t1_renew != 0xffffffffUL) { + /* set renewal period timer */ + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(): t1 renewal timer %"U32_F" secs\n", dhcp->offered_t1_renew)); + DHCP_SET_TIMEOUT_FROM_OFFERED_T1_RENEW(dhcp->t1_timeout, dhcp); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_bind(): set request timeout %"U32_F" msecs\n", dhcp->offered_t1_renew * 1000)); + dhcp->t1_renew_time = dhcp->t1_timeout; + } + /* set renewal period timer */ + if (dhcp->offered_t2_rebind != 0xffffffffUL) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(): t2 rebind timer %"U32_F" secs\n", dhcp->offered_t2_rebind)); + DHCP_SET_TIMEOUT_FROM_OFFERED_T2_REBIND(dhcp->t2_timeout, dhcp); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_bind(): set request timeout %"U32_F" msecs\n", dhcp->offered_t2_rebind * 1000)); + dhcp->t2_rebind_time = dhcp->t2_timeout; + } + + /* If we have sub 1 minute lease, t2 and t1 will kick in at the same time. */ + if ((dhcp->t1_timeout >= dhcp->t2_timeout) && (dhcp->t2_timeout > 0)) { + dhcp->t1_timeout = 0; + } + + if (dhcp->flags & DHCP_FLAG_SUBNET_MASK_GIVEN) { + /* copy offered network mask */ + ip4_addr_copy(sn_mask, dhcp->offered_sn_mask); + } else { + /* subnet mask not given, choose a safe subnet mask given the network class */ + u8_t first_octet = ip4_addr1(&dhcp->offered_ip_addr); + if (first_octet <= 127) { + ip4_addr_set_u32(&sn_mask, PP_HTONL(0xff000000UL)); + } else if (first_octet >= 192) { + ip4_addr_set_u32(&sn_mask, PP_HTONL(0xffffff00UL)); + } else { + ip4_addr_set_u32(&sn_mask, PP_HTONL(0xffff0000UL)); + } + } + + ip4_addr_copy(gw_addr, dhcp->offered_gw_addr); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_bind(): IP: 0x%08"X32_F" SN: 0x%08"X32_F" GW: 0x%08"X32_F"\n", + ip4_addr_get_u32(&dhcp->offered_ip_addr), ip4_addr_get_u32(&sn_mask), ip4_addr_get_u32(&gw_addr))); + /* netif is now bound to DHCP leased address - set this before assigning the address + to ensure the callback can use dhcp_supplied_address() */ + dhcp_set_state(dhcp, DHCP_STATE_BOUND); + + netif_set_addr(netif, &dhcp->offered_ip_addr, &sn_mask, &gw_addr); + /* interface is used by routing now that an address is set */ +} + +/** + * @ingroup dhcp4 + * Renew an existing DHCP lease at the involved DHCP server. + * + * @param netif network interface which must renew its lease + */ +err_t +dhcp_renew(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + err_t result; + u16_t msecs; + u8_t i; + struct pbuf *p_out; + u16_t options_out_len; + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_renew()\n")); + dhcp_set_state(dhcp, DHCP_STATE_RENEWING); + + /* create and initialize the DHCP message header */ + p_out = dhcp_create_msg(netif, dhcp, DHCP_REQUEST, &options_out_len); + if (p_out != NULL) { + struct dhcp_msg *msg_out = (struct dhcp_msg *)p_out->payload; + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + options_out_len = dhcp_option_short(options_out_len, msg_out->options, DHCP_MAX_MSG_LEN(netif)); + + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_PARAMETER_REQUEST_LIST, LWIP_ARRAYSIZE(dhcp_discover_request_options)); + for (i = 0; i < LWIP_ARRAYSIZE(dhcp_discover_request_options); i++) { + options_out_len = dhcp_option_byte(options_out_len, msg_out->options, dhcp_discover_request_options[i]); + } + +#if LWIP_NETIF_HOSTNAME + options_out_len = dhcp_option_hostname(options_out_len, msg_out->options, netif); +#endif /* LWIP_NETIF_HOSTNAME */ + + LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, DHCP_STATE_RENEWING, msg_out, DHCP_REQUEST, &options_out_len); + dhcp_option_trailer(options_out_len, msg_out->options, p_out); + + result = udp_sendto_if(dhcp_pcb, p_out, &dhcp->server_ip_addr, LWIP_IANA_PORT_DHCP_SERVER, netif); + pbuf_free(p_out); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_renew: RENEWING\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_renew: could not allocate DHCP request\n")); + result = ERR_MEM; + } + if (dhcp->tries < 255) { + dhcp->tries++; + } + /* back-off on retries, but to a maximum of 20 seconds */ + msecs = (u16_t)(dhcp->tries < 10 ? dhcp->tries * 2000 : 20 * 1000); + dhcp->request_timeout = (u16_t)((msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_renew(): set request timeout %"U16_F" msecs\n", msecs)); + return result; +} + +/** + * Rebind with a DHCP server for an existing DHCP lease. + * + * @param netif network interface which must rebind with a DHCP server + */ +static err_t +dhcp_rebind(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + err_t result; + u16_t msecs; + u8_t i; + struct pbuf *p_out; + u16_t options_out_len; + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind()\n")); + dhcp_set_state(dhcp, DHCP_STATE_REBINDING); + + /* create and initialize the DHCP message header */ + p_out = dhcp_create_msg(netif, dhcp, DHCP_REQUEST, &options_out_len); + if (p_out != NULL) { + struct dhcp_msg *msg_out = (struct dhcp_msg *)p_out->payload; + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + options_out_len = dhcp_option_short(options_out_len, msg_out->options, DHCP_MAX_MSG_LEN(netif)); + + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_PARAMETER_REQUEST_LIST, LWIP_ARRAYSIZE(dhcp_discover_request_options)); + for (i = 0; i < LWIP_ARRAYSIZE(dhcp_discover_request_options); i++) { + options_out_len = dhcp_option_byte(options_out_len, msg_out->options, dhcp_discover_request_options[i]); + } + +#if LWIP_NETIF_HOSTNAME + options_out_len = dhcp_option_hostname(options_out_len, msg_out->options, netif); +#endif /* LWIP_NETIF_HOSTNAME */ + + LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, DHCP_STATE_REBINDING, msg_out, DHCP_DISCOVER, &options_out_len); + dhcp_option_trailer(options_out_len, msg_out->options, p_out); + + /* broadcast to server */ + result = udp_sendto_if(dhcp_pcb, p_out, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER, netif); + pbuf_free(p_out); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind: REBINDING\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_rebind: could not allocate DHCP request\n")); + result = ERR_MEM; + } + if (dhcp->tries < 255) { + dhcp->tries++; + } + msecs = (u16_t)(dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000); + dhcp->request_timeout = (u16_t)((msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind(): set request timeout %"U16_F" msecs\n", msecs)); + return result; +} + +/** + * Enter REBOOTING state to verify an existing lease + * + * @param netif network interface which must reboot + */ +static err_t +dhcp_reboot(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + err_t result; + u16_t msecs; + u8_t i; + struct pbuf *p_out; + u16_t options_out_len; + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_reboot()\n")); + dhcp_set_state(dhcp, DHCP_STATE_REBOOTING); + + /* create and initialize the DHCP message header */ + p_out = dhcp_create_msg(netif, dhcp, DHCP_REQUEST, &options_out_len); + if (p_out != NULL) { + struct dhcp_msg *msg_out = (struct dhcp_msg *)p_out->payload; + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN); + options_out_len = dhcp_option_short(options_out_len, msg_out->options, DHCP_MAX_MSG_LEN_MIN_REQUIRED); + + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_REQUESTED_IP, 4); + options_out_len = dhcp_option_long(options_out_len, msg_out->options, lwip_ntohl(ip4_addr_get_u32(&dhcp->offered_ip_addr))); + + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_PARAMETER_REQUEST_LIST, LWIP_ARRAYSIZE(dhcp_discover_request_options)); + for (i = 0; i < LWIP_ARRAYSIZE(dhcp_discover_request_options); i++) { + options_out_len = dhcp_option_byte(options_out_len, msg_out->options, dhcp_discover_request_options[i]); + } + +#if LWIP_NETIF_HOSTNAME + options_out_len = dhcp_option_hostname(options_out_len, msg_out->options, netif); +#endif /* LWIP_NETIF_HOSTNAME */ + + LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, DHCP_STATE_REBOOTING, msg_out, DHCP_REQUEST, &options_out_len); + dhcp_option_trailer(options_out_len, msg_out->options, p_out); + + /* broadcast to server */ + result = udp_sendto_if(dhcp_pcb, p_out, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER, netif); + pbuf_free(p_out); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_reboot: REBOOTING\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_reboot: could not allocate DHCP request\n")); + result = ERR_MEM; + } + if (dhcp->tries < 255) { + dhcp->tries++; + } + msecs = (u16_t)(dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000); + dhcp->request_timeout = (u16_t)((msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_reboot(): set request timeout %"U16_F" msecs\n", msecs)); + return result; +} + +/** + * @ingroup dhcp4 + * Release a DHCP lease and stop DHCP statemachine (and AUTOIP if LWIP_DHCP_AUTOIP_COOP). + * + * @param netif network interface + */ +void +dhcp_release_and_stop(struct netif *netif) +{ + struct dhcp *dhcp = netif_dhcp_data(netif); + ip_addr_t server_ip_addr; + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_release_and_stop()\n")); + if (dhcp == NULL) { + return; + } + + /* already off? -> nothing to do */ + if (dhcp->state == DHCP_STATE_OFF) { + return; + } + + ip_addr_copy(server_ip_addr, dhcp->server_ip_addr); + + /* clean old DHCP offer */ + ip_addr_set_zero_ip4(&dhcp->server_ip_addr); + ip4_addr_set_zero(&dhcp->offered_ip_addr); + ip4_addr_set_zero(&dhcp->offered_sn_mask); + ip4_addr_set_zero(&dhcp->offered_gw_addr); +#if LWIP_DHCP_BOOTP_FILE + ip4_addr_set_zero(&dhcp->offered_si_addr); +#endif /* LWIP_DHCP_BOOTP_FILE */ + dhcp->offered_t0_lease = dhcp->offered_t1_renew = dhcp->offered_t2_rebind = 0; + dhcp->t1_renew_time = dhcp->t2_rebind_time = dhcp->lease_used = dhcp->t0_timeout = 0; + + /* send release message when current IP was assigned via DHCP */ + if (dhcp_supplied_address(netif)) { + /* create and initialize the DHCP message header */ + struct pbuf *p_out; + u16_t options_out_len; + dhcp_set_state(dhcp, DHCP_STATE_OFF); + p_out = dhcp_create_msg(netif, dhcp, DHCP_RELEASE, &options_out_len); + if (p_out != NULL) { + struct dhcp_msg *msg_out = (struct dhcp_msg *)p_out->payload; + options_out_len = dhcp_option(options_out_len, msg_out->options, DHCP_OPTION_SERVER_ID, 4); + options_out_len = dhcp_option_long(options_out_len, msg_out->options, lwip_ntohl(ip4_addr_get_u32(ip_2_ip4(&server_ip_addr)))); + + LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, dhcp->state, msg_out, DHCP_RELEASE, &options_out_len); + dhcp_option_trailer(options_out_len, msg_out->options, p_out); + + udp_sendto_if(dhcp_pcb, p_out, &server_ip_addr, LWIP_IANA_PORT_DHCP_SERVER, netif); + pbuf_free(p_out); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_release: RELEASED, DHCP_STATE_OFF\n")); + } else { + /* sending release failed, but that's not a problem since the correct behaviour of dhcp does not rely on release */ + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_release: could not allocate DHCP request\n")); + } + + /* remove IP address from interface (prevents routing from selecting this interface) */ + netif_set_addr(netif, IP4_ADDR_ANY4, IP4_ADDR_ANY4, IP4_ADDR_ANY4); + } else { + dhcp_set_state(dhcp, DHCP_STATE_OFF); + } + +#if LWIP_DHCP_DOES_ACD_CHECK + /* stop acd because we may be in checking state and the callback would trigger a bind */ + acd_remove(netif, &dhcp->acd); +#endif + + if (dhcp->pcb_allocated != 0) { + dhcp_dec_pcb_refcount(); /* free DHCP PCB if not needed any more */ + dhcp->pcb_allocated = 0; + } +} + +/** + * @ingroup dhcp4 + * This function calls dhcp_release_and_stop() internally. + * @deprecated Use dhcp_release_and_stop() instead. + */ +err_t +dhcp_release(struct netif *netif) +{ + dhcp_release_and_stop(netif); + return ERR_OK; +} + +/** + * @ingroup dhcp4 + * This function calls dhcp_release_and_stop() internally. + * @deprecated Use dhcp_release_and_stop() instead. + */ +void +dhcp_stop(struct netif *netif) +{ + dhcp_release_and_stop(netif); +} + +/* + * Set the DHCP state of a DHCP client. + * + * If the state changed, reset the number of tries. + */ +static void +dhcp_set_state(struct dhcp *dhcp, u8_t new_state) +{ + if (new_state != dhcp->state) { + dhcp->state = new_state; + dhcp->tries = 0; + dhcp->request_timeout = 0; + } +} + +/* + * Concatenate an option type and length field to the outgoing + * DHCP message. + * + */ +static u16_t +dhcp_option(u16_t options_out_len, u8_t *options, u8_t option_type, u8_t option_len) +{ + LWIP_ASSERT("dhcp_option: options_out_len + 2 + option_len <= DHCP_OPTIONS_LEN", options_out_len + 2U + option_len <= DHCP_OPTIONS_LEN); + options[options_out_len++] = option_type; + options[options_out_len++] = option_len; + return options_out_len; +} +/* + * Concatenate a single byte to the outgoing DHCP message. + * + */ +static u16_t +dhcp_option_byte(u16_t options_out_len, u8_t *options, u8_t value) +{ + LWIP_ASSERT("dhcp_option_byte: options_out_len < DHCP_OPTIONS_LEN", options_out_len < DHCP_OPTIONS_LEN); + options[options_out_len++] = value; + return options_out_len; +} + +static u16_t +dhcp_option_short(u16_t options_out_len, u8_t *options, u16_t value) +{ + LWIP_ASSERT("dhcp_option_short: options_out_len + 2 <= DHCP_OPTIONS_LEN", options_out_len + 2U <= DHCP_OPTIONS_LEN); + options[options_out_len++] = (u8_t)((value & 0xff00U) >> 8); + options[options_out_len++] = (u8_t) (value & 0x00ffU); + return options_out_len; +} + +static u16_t +dhcp_option_long(u16_t options_out_len, u8_t *options, u32_t value) +{ + LWIP_ASSERT("dhcp_option_long: options_out_len + 4 <= DHCP_OPTIONS_LEN", options_out_len + 4U <= DHCP_OPTIONS_LEN); + options[options_out_len++] = (u8_t)((value & 0xff000000UL) >> 24); + options[options_out_len++] = (u8_t)((value & 0x00ff0000UL) >> 16); + options[options_out_len++] = (u8_t)((value & 0x0000ff00UL) >> 8); + options[options_out_len++] = (u8_t)((value & 0x000000ffUL)); + return options_out_len; +} + +#if LWIP_NETIF_HOSTNAME +static u16_t +dhcp_option_hostname(u16_t options_out_len, u8_t *options, struct netif *netif) +{ + if (netif->hostname != NULL) { + size_t namelen = strlen(netif->hostname); + if (namelen > 0) { + size_t len; + const char *p = netif->hostname; + /* Shrink len to available bytes (need 2 bytes for OPTION_HOSTNAME + and 1 byte for trailer) */ + size_t available = DHCP_OPTIONS_LEN - options_out_len - 3; + LWIP_ASSERT("DHCP: hostname is too long!", namelen <= available); + len = LWIP_MIN(namelen, available); + LWIP_ASSERT("DHCP: hostname is too long!", len <= 0xFF); + options_out_len = dhcp_option(options_out_len, options, DHCP_OPTION_HOSTNAME, (u8_t)len); + while (len--) { + options_out_len = dhcp_option_byte(options_out_len, options, *p++); + } + } + } + return options_out_len; +} +#endif /* LWIP_NETIF_HOSTNAME */ + +/** + * Extract the DHCP message and the DHCP options. + * + * Extract the DHCP message and the DHCP options, each into a contiguous + * piece of memory. As a DHCP message is variable sized by its options, + * and also allows overriding some fields for options, the easy approach + * is to first unfold the options into a contiguous piece of memory, and + * use that further on. + * + */ +static err_t +dhcp_parse_reply(struct pbuf *p, struct dhcp *dhcp) +{ + u8_t *options; + u16_t offset; + u16_t offset_max; + u16_t options_offset; + u16_t options_idx; + u16_t options_idx_max; + struct pbuf *q; + int parse_file_as_options = 0; + int parse_sname_as_options = 0; + struct dhcp_msg *msg_in; +#if LWIP_DHCP_BOOTP_FILE + int file_overloaded = 0; +#endif + + LWIP_UNUSED_ARG(dhcp); + + /* clear received options */ + dhcp_clear_all_options(dhcp); + /* check that beginning of dhcp_msg (up to and including chaddr) is in first pbuf */ + if (p->len < DHCP_SNAME_OFS) { + return ERR_BUF; + } + msg_in = (struct dhcp_msg *)p->payload; +#if LWIP_DHCP_BOOTP_FILE + /* clear boot file name */ + dhcp->boot_file_name[0] = 0; +#endif /* LWIP_DHCP_BOOTP_FILE */ + + /* parse options */ + + /* start with options field */ + options_idx = DHCP_OPTIONS_OFS; + /* parse options to the end of the received packet */ + options_idx_max = p->tot_len; +again: + q = p; + options_offset = options_idx; + while ((q != NULL) && (options_idx >= q->len)) { + options_idx = (u16_t)(options_idx - q->len); + options_idx_max = (u16_t)(options_idx_max - q->len); + q = q->next; + } + if (q == NULL) { + return ERR_BUF; + } + offset = options_idx; + offset_max = options_idx_max; + options = (u8_t *)q->payload; + /* at least 1 byte to read and no end marker, then at least 3 bytes to read? */ + while ((q != NULL) && (offset < offset_max) && (options[offset] != DHCP_OPTION_END)) { + u8_t op = options[offset]; + u8_t len; + u8_t decode_len = 0; + int decode_idx = -1; + u16_t val_offset = (u16_t)(offset + 2); + if (val_offset < offset) { + /* overflow */ + return ERR_BUF; + } + /* len byte might be in the next pbuf */ + if ((offset + 1) < q->len) { + len = options[offset + 1]; + } else { + len = (q->next != NULL ? ((u8_t *)q->next->payload)[0] : 0); + } + /* LWIP_DEBUGF(DHCP_DEBUG, ("msg_offset=%"U16_F", q->len=%"U16_F"\n", msg_offset, q->len)); */ + decode_len = len; + switch (op) { + /* case(DHCP_OPTION_END): handled above */ + case (DHCP_OPTION_PAD): + /* special option: no len encoded */ + decode_len = len = 0; + /* will be increased below */ + break; + case (DHCP_OPTION_SUBNET_MASK): + LWIP_DHCP_INPUT_ERROR("len == 4", len == 4, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_SUBNET_MASK; + break; + case (DHCP_OPTION_ROUTER): + decode_len = 4; /* only copy the first given router */ + LWIP_DHCP_INPUT_ERROR("len >= decode_len", len >= decode_len, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_ROUTER; + break; +#if LWIP_DHCP_PROVIDE_DNS_SERVERS + case (DHCP_OPTION_DNS_SERVER): + /* special case: there might be more than one server */ + LWIP_DHCP_INPUT_ERROR("len %% 4 == 0", len % 4 == 0, return ERR_VAL;); + /* limit number of DNS servers */ + decode_len = LWIP_MIN(len, 4 * DNS_MAX_SERVERS); + LWIP_DHCP_INPUT_ERROR("len >= decode_len", len >= decode_len, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_DNS_SERVER; + break; +#endif /* LWIP_DHCP_PROVIDE_DNS_SERVERS */ + case (DHCP_OPTION_LEASE_TIME): + LWIP_DHCP_INPUT_ERROR("len == 4", len == 4, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_LEASE_TIME; + break; +#if LWIP_DHCP_GET_NTP_SRV + case (DHCP_OPTION_NTP): + /* special case: there might be more than one server */ + LWIP_DHCP_INPUT_ERROR("len %% 4 == 0", len % 4 == 0, return ERR_VAL;); + /* limit number of NTP servers */ + decode_len = LWIP_MIN(len, 4 * LWIP_DHCP_MAX_NTP_SERVERS); + LWIP_DHCP_INPUT_ERROR("len >= decode_len", len >= decode_len, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_NTP_SERVER; + break; +#endif /* LWIP_DHCP_GET_NTP_SRV*/ + case (DHCP_OPTION_OVERLOAD): + LWIP_DHCP_INPUT_ERROR("len == 1", len == 1, return ERR_VAL;); + /* decode overload only in options, not in file/sname: invalid packet */ + LWIP_DHCP_INPUT_ERROR("overload in file/sname", options_offset == DHCP_OPTIONS_OFS, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_OVERLOAD; + break; + case (DHCP_OPTION_MESSAGE_TYPE): + LWIP_DHCP_INPUT_ERROR("len == 1", len == 1, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_MSG_TYPE; + break; + case (DHCP_OPTION_SERVER_ID): + LWIP_DHCP_INPUT_ERROR("len == 4", len == 4, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_SERVER_ID; + break; + case (DHCP_OPTION_T1): + LWIP_DHCP_INPUT_ERROR("len == 4", len == 4, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_T1; + break; + case (DHCP_OPTION_T2): + LWIP_DHCP_INPUT_ERROR("len == 4", len == 4, return ERR_VAL;); + decode_idx = DHCP_OPTION_IDX_T2; + break; + default: + decode_len = 0; + LWIP_DEBUGF(DHCP_DEBUG, ("skipping option %"U16_F" in options\n", (u16_t)op)); + LWIP_HOOK_DHCP_PARSE_OPTION(ip_current_netif(), dhcp, dhcp->state, msg_in, + dhcp_option_given(dhcp, DHCP_OPTION_IDX_MSG_TYPE) ? (u8_t)dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_MSG_TYPE) : 0, + op, len, q, val_offset); + break; + } + if (op == DHCP_OPTION_PAD) { + offset++; + } else { + if (offset + len + 2 > 0xFFFF) { + /* overflow */ + return ERR_BUF; + } + offset = (u16_t)(offset + len + 2); + if (decode_len > 0) { + u32_t value = 0; + u16_t copy_len; +decode_next: + LWIP_ASSERT("check decode_idx", decode_idx >= 0 && decode_idx < DHCP_OPTION_IDX_MAX); + if (!dhcp_option_given(dhcp, decode_idx)) { + copy_len = LWIP_MIN(decode_len, 4); + if (pbuf_copy_partial(q, &value, copy_len, val_offset) != copy_len) { + return ERR_BUF; + } + if (decode_len > 4) { + /* decode more than one u32_t */ + u16_t next_val_offset; + LWIP_DHCP_INPUT_ERROR("decode_len %% 4 == 0", decode_len % 4 == 0, return ERR_VAL;); + dhcp_got_option(dhcp, decode_idx); + dhcp_set_option_value(dhcp, decode_idx, lwip_htonl(value)); + decode_len = (u8_t)(decode_len - 4); + next_val_offset = (u16_t)(val_offset + 4); + if (next_val_offset < val_offset) { + /* overflow */ + return ERR_BUF; + } + val_offset = next_val_offset; + decode_idx++; + goto decode_next; + } else if (decode_len == 4) { + value = lwip_ntohl(value); + } else { + LWIP_DHCP_INPUT_ERROR("invalid decode_len", decode_len == 1, return ERR_VAL;); + value = ((u8_t *)&value)[0]; + } + dhcp_got_option(dhcp, decode_idx); + dhcp_set_option_value(dhcp, decode_idx, value); + } + } + } + if (offset >= q->len) { + offset = (u16_t)(offset - q->len); + offset_max = (u16_t)(offset_max - q->len); + if (offset < offset_max) { + q = q->next; + LWIP_DHCP_INPUT_ERROR("next pbuf was null", q != NULL, return ERR_VAL;); + options = (u8_t *)q->payload; + } else { + /* We've run out of bytes, probably no end marker. Don't proceed. */ + return ERR_BUF; + } + } + } + /* is this an overloaded message? */ + if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_OVERLOAD)) { + u32_t overload = dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_OVERLOAD); + dhcp_clear_option(dhcp, DHCP_OPTION_IDX_OVERLOAD); + if (overload == DHCP_OVERLOAD_FILE) { + parse_file_as_options = 1; + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("overloaded file field\n")); + } else if (overload == DHCP_OVERLOAD_SNAME) { + parse_sname_as_options = 1; + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("overloaded sname field\n")); + } else if (overload == DHCP_OVERLOAD_SNAME_FILE) { + parse_sname_as_options = 1; + parse_file_as_options = 1; + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("overloaded sname and file field\n")); + } else { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("invalid overload option: %d\n", (int)overload)); + } + } + if (parse_file_as_options) { + /* if both are overloaded, parse file first and then sname (RFC 2131 ch. 4.1) */ + parse_file_as_options = 0; + options_idx = DHCP_FILE_OFS; + options_idx_max = DHCP_FILE_OFS + DHCP_FILE_LEN; +#if LWIP_DHCP_BOOTP_FILE + file_overloaded = 1; +#endif + goto again; + } else if (parse_sname_as_options) { + parse_sname_as_options = 0; + options_idx = DHCP_SNAME_OFS; + options_idx_max = DHCP_SNAME_OFS + DHCP_SNAME_LEN; + goto again; + } +#if LWIP_DHCP_BOOTP_FILE + if (!file_overloaded) { + /* only do this for ACK messages */ + if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_MSG_TYPE) && + (dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_MSG_TYPE) == DHCP_ACK)) + /* copy bootp file name, don't care for sname (server hostname) */ + if (pbuf_copy_partial(p, dhcp->boot_file_name, DHCP_FILE_LEN-1, DHCP_FILE_OFS) != (DHCP_FILE_LEN-1)) { + return ERR_BUF; + } + /* make sure the string is really NULL-terminated */ + dhcp->boot_file_name[DHCP_FILE_LEN-1] = 0; + } +#endif /* LWIP_DHCP_BOOTP_FILE */ + return ERR_OK; +} + +/** + * If an incoming DHCP message is in response to us, then trigger the state machine + */ +static void +dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) +{ + struct netif *netif = ip_current_input_netif(); + struct dhcp *dhcp = netif_dhcp_data(netif); + struct dhcp_msg *reply_msg = (struct dhcp_msg *)p->payload; + u8_t msg_type; + u8_t i; + struct dhcp_msg *msg_in; + + LWIP_UNUSED_ARG(arg); + + /* Caught DHCP message from netif that does not have DHCP enabled? -> not interested */ + if ((dhcp == NULL) || (dhcp->pcb_allocated == 0)) { + goto free_pbuf_and_return; + } + + LWIP_ASSERT("invalid server address type", IP_IS_V4(addr)); + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_recv(pbuf = %p) from DHCP server %"U16_F".%"U16_F".%"U16_F".%"U16_F" port %"U16_F"\n", (void *)p, + ip4_addr1_16(ip_2_ip4(addr)), ip4_addr2_16(ip_2_ip4(addr)), ip4_addr3_16(ip_2_ip4(addr)), ip4_addr4_16(ip_2_ip4(addr)), port)); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("pbuf->len = %"U16_F"\n", p->len)); + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("pbuf->tot_len = %"U16_F"\n", p->tot_len)); + /* prevent warnings about unused arguments */ + LWIP_UNUSED_ARG(pcb); + LWIP_UNUSED_ARG(addr); + LWIP_UNUSED_ARG(port); + + if (p->len < DHCP_MIN_REPLY_LEN) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("DHCP reply message or pbuf too short\n")); + goto free_pbuf_and_return; + } + + if (reply_msg->op != DHCP_BOOTREPLY) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("not a DHCP reply message, but type %"U16_F"\n", (u16_t)reply_msg->op)); + goto free_pbuf_and_return; + } + /* iterate through hardware address and match against DHCP message */ + for (i = 0; i < netif->hwaddr_len && i < LWIP_MIN(DHCP_CHADDR_LEN, NETIF_MAX_HWADDR_LEN); i++) { + if (netif->hwaddr[i] != reply_msg->chaddr[i]) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, + ("netif->hwaddr[%"U16_F"]==%02"X16_F" != reply_msg->chaddr[%"U16_F"]==%02"X16_F"\n", + (u16_t)i, (u16_t)netif->hwaddr[i], (u16_t)i, (u16_t)reply_msg->chaddr[i])); + goto free_pbuf_and_return; + } + } + /* match transaction ID against what we expected */ + if (lwip_ntohl(reply_msg->xid) != dhcp->xid) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, + ("transaction id mismatch reply_msg->xid(%"X32_F")!=dhcp->xid(%"X32_F")\n", lwip_ntohl(reply_msg->xid), dhcp->xid)); + goto free_pbuf_and_return; + } + /* option fields could be unfold? */ + if (dhcp_parse_reply(p, dhcp) != ERR_OK) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, + ("problem unfolding DHCP message - too short on memory?\n")); + goto free_pbuf_and_return; + } + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("searching DHCP_OPTION_MESSAGE_TYPE\n")); + /* obtain pointer to DHCP message type */ + if (!dhcp_option_given(dhcp, DHCP_OPTION_IDX_MSG_TYPE)) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("DHCP_OPTION_MESSAGE_TYPE option not found\n")); + goto free_pbuf_and_return; + } + + msg_in = (struct dhcp_msg *)p->payload; + /* read DHCP message type */ + msg_type = (u8_t)dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_MSG_TYPE); + /* message type is DHCP ACK? */ + if (msg_type == DHCP_ACK) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("DHCP_ACK received\n")); + /* in requesting state or just reconnected to the network? */ + if ((dhcp->state == DHCP_STATE_REQUESTING) || + (dhcp->state == DHCP_STATE_REBOOTING)) { + dhcp_handle_ack(netif, msg_in); +#if LWIP_DHCP_DOES_ACD_CHECK + if ((netif->flags & NETIF_FLAG_ETHARP) != 0) { + /* check if the acknowledged lease address is already in use */ + dhcp_check(netif); + } else { + /* bind interface to the acknowledged lease address */ + dhcp_bind(netif); + } +#else + /* bind interface to the acknowledged lease address */ + dhcp_bind(netif); +#endif + } + /* already bound to the given lease address and using it? */ + else if ((dhcp->state == DHCP_STATE_REBINDING) || + (dhcp->state == DHCP_STATE_RENEWING)) { + dhcp_handle_ack(netif, msg_in); + dhcp_bind(netif); + } + } + /* received a DHCP_NAK in appropriate state? */ + else if ((msg_type == DHCP_NAK) && + ((dhcp->state == DHCP_STATE_REBOOTING) || (dhcp->state == DHCP_STATE_REQUESTING) || + (dhcp->state == DHCP_STATE_REBINDING) || (dhcp->state == DHCP_STATE_RENEWING ))) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("DHCP_NAK received\n")); + dhcp_handle_nak(netif); + } + /* received a DHCP_OFFER in DHCP_STATE_SELECTING state? */ + else if ((msg_type == DHCP_OFFER) && (dhcp->state == DHCP_STATE_SELECTING)) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("DHCP_OFFER received in DHCP_STATE_SELECTING state\n")); + /* remember offered lease */ + dhcp_handle_offer(netif, msg_in); + } + +free_pbuf_and_return: + pbuf_free(p); +} + +/** + * Create a DHCP request, fill in common headers + * + * @param netif the netif under DHCP control + * @param dhcp dhcp control struct + * @param message_type message type of the request + */ +static struct pbuf * +dhcp_create_msg(struct netif *netif, struct dhcp *dhcp, u8_t message_type, u16_t *options_out_len) +{ + u16_t i; + struct pbuf *p_out; + struct dhcp_msg *msg_out; + u16_t options_out_len_loc; + +#ifndef DHCP_GLOBAL_XID + /** default global transaction identifier starting value (easy to match + * with a packet analyser). We simply increment for each new request. + * Predefine DHCP_GLOBAL_XID to a better value or a function call to generate one + * at runtime, any supporting function prototypes can be defined in DHCP_GLOBAL_XID_HEADER */ +#if DHCP_CREATE_RAND_XID && defined(LWIP_RAND) + static u32_t xid; +#else /* DHCP_CREATE_RAND_XID && defined(LWIP_RAND) */ + static u32_t xid = 0xABCD0000; +#endif /* DHCP_CREATE_RAND_XID && defined(LWIP_RAND) */ +#else + if (!xid_initialised) { + xid = DHCP_GLOBAL_XID; + xid_initialised = !xid_initialised; + } +#endif + LWIP_ERROR("dhcp_create_msg: netif != NULL", (netif != NULL), return NULL;); + LWIP_ERROR("dhcp_create_msg: dhcp != NULL", (dhcp != NULL), return NULL;); + p_out = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcp_msg), PBUF_RAM); + if (p_out == NULL) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, + ("dhcp_create_msg(): could not allocate pbuf\n")); + return NULL; + } + LWIP_ASSERT("dhcp_create_msg: check that first pbuf can hold struct dhcp_msg", + (p_out->len >= sizeof(struct dhcp_msg))); + + /* DHCP_REQUEST should reuse 'xid' from DHCPOFFER */ + if ((message_type != DHCP_REQUEST) || (dhcp->state == DHCP_STATE_REBOOTING)) { + /* reuse transaction identifier in retransmissions */ + if (dhcp->tries == 0) { +#if DHCP_CREATE_RAND_XID && defined(LWIP_RAND) + xid = LWIP_RAND(); +#else /* DHCP_CREATE_RAND_XID && defined(LWIP_RAND) */ + xid++; +#endif /* DHCP_CREATE_RAND_XID && defined(LWIP_RAND) */ + } + dhcp->xid = xid; + } + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, + ("transaction id xid(%"X32_F")\n", xid)); + + msg_out = (struct dhcp_msg *)p_out->payload; + memset(msg_out, 0, sizeof(struct dhcp_msg)); + + msg_out->op = DHCP_BOOTREQUEST; + /* @todo: make link layer independent */ + msg_out->htype = LWIP_IANA_HWTYPE_ETHERNET; + msg_out->hlen = netif->hwaddr_len; + msg_out->xid = lwip_htonl(dhcp->xid); + /* we don't need the broadcast flag since we can receive unicast traffic + before being fully configured! */ + /* set ciaddr to netif->ip_addr based on message_type and state */ + if ((message_type == DHCP_INFORM) || (message_type == DHCP_DECLINE) || (message_type == DHCP_RELEASE) || + ((message_type == DHCP_REQUEST) && /* DHCP_STATE_BOUND not used for sending! */ + ((dhcp->state == DHCP_STATE_RENEWING) || dhcp->state == DHCP_STATE_REBINDING))) { + ip4_addr_copy(msg_out->ciaddr, *netif_ip4_addr(netif)); + } + for (i = 0; i < LWIP_MIN(DHCP_CHADDR_LEN, NETIF_MAX_HWADDR_LEN); i++) { + /* copy netif hardware address (padded with zeroes through memset already) */ + msg_out->chaddr[i] = netif->hwaddr[i]; + } + msg_out->cookie = PP_HTONL(DHCP_MAGIC_COOKIE); + /* Add option MESSAGE_TYPE */ + options_out_len_loc = dhcp_option(0, msg_out->options, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN); + options_out_len_loc = dhcp_option_byte(options_out_len_loc, msg_out->options, message_type); + if (options_out_len) { + *options_out_len = options_out_len_loc; + } + return p_out; +} + +/** + * Add a DHCP message trailer + * + * Adds the END option to the DHCP message, and if + * necessary, up to three padding bytes. + */ +static void +dhcp_option_trailer(u16_t options_out_len, u8_t *options, struct pbuf *p_out) +{ + options[options_out_len++] = DHCP_OPTION_END; + /* packet is too small, or not 4 byte aligned? */ + while (((options_out_len < DHCP_MIN_OPTIONS_LEN) || (options_out_len & 3)) && + (options_out_len < DHCP_OPTIONS_LEN)) { + /* add a fill/padding byte */ + options[options_out_len++] = 0; + } + /* shrink the pbuf to the actual content length */ + pbuf_realloc(p_out, (u16_t)(sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + options_out_len)); +} + +/** check if DHCP supplied netif->ip_addr + * + * @param netif the netif to check + * @return 1 if DHCP supplied netif->ip_addr (states BOUND or RENEWING), + * 0 otherwise + */ +u8_t +dhcp_supplied_address(const struct netif *netif) +{ + if ((netif != NULL) && (netif_dhcp_data(netif) != NULL)) { + struct dhcp *dhcp = netif_dhcp_data(netif); + return (dhcp->state == DHCP_STATE_BOUND) || (dhcp->state == DHCP_STATE_RENEWING) || + (dhcp->state == DHCP_STATE_REBINDING); + } + return 0; +} + +#endif /* LWIP_IPV4 && LWIP_DHCP */ diff --git a/lib/lwip/core/ipv4/etharp.c b/lib/lwip/core/ipv4/etharp.c new file mode 100644 index 0000000000..3092dc944a --- /dev/null +++ b/lib/lwip/core/ipv4/etharp.c @@ -0,0 +1,1251 @@ +/** + * @file + * Address Resolution Protocol module for IP over Ethernet + * + * Functionally, ARP is divided into two parts. The first maps an IP address + * to a physical address when sending a packet, and the second part answers + * requests from other machines for our physical address. + * + * This implementation complies with RFC 826 (Ethernet ARP). It supports + * Gratuitous ARP from RFC3220 (IP Mobility Support for IPv4) section 4.6 + * if an interface calls etharp_gratuitous(our_netif) upon address change. + */ + +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * Copyright (c) 2003-2004 Leon Woestenberg leon.woestenberg@axon.tv + * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "lwip/opt.h" + +#if LWIP_IPV4 && LWIP_ARP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/etharp.h" +#include "lwip/stats.h" +#include "lwip/snmp.h" +#include "lwip/dhcp.h" +#include "lwip/autoip.h" +#include "lwip/acd.h" +#include "lwip/prot/iana.h" +#include "netif/ethernet.h" + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +/** Re-request a used ARP entry 1 minute before it would expire to prevent + * breaking a steadily used connection because the ARP entry timed out. */ +#define ARP_AGE_REREQUEST_USED_UNICAST (ARP_MAXAGE - 30) +#define ARP_AGE_REREQUEST_USED_BROADCAST (ARP_MAXAGE - 15) + +/** the time an ARP entry stays pending after first request, + * for ARP_TMR_INTERVAL = 1000, this is + * 10 seconds. + * + * @internal Keep this number at least 2, otherwise it might + * run out instantly if the timeout occurs directly after a request. + */ +#define ARP_MAXPENDING 5 + +/** ARP states */ +enum etharp_state { + ETHARP_STATE_EMPTY = 0, + ETHARP_STATE_PENDING, + ETHARP_STATE_STABLE, + ETHARP_STATE_STABLE_REREQUESTING_1, + ETHARP_STATE_STABLE_REREQUESTING_2 +#if ETHARP_SUPPORT_STATIC_ENTRIES + , ETHARP_STATE_STATIC +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */ +}; + +struct etharp_entry { +#if ARP_QUEUEING + /** Pointer to queue of pending outgoing packets on this ARP entry. */ + struct etharp_q_entry *q; +#else /* ARP_QUEUEING */ + /** Pointer to a single pending outgoing packet on this ARP entry. */ + struct pbuf *q; +#endif /* ARP_QUEUEING */ + ip4_addr_t ipaddr; + struct netif *netif; + struct eth_addr ethaddr; + u16_t ctime; + u8_t state; +}; + +static struct etharp_entry arp_table[ARP_TABLE_SIZE]; + +#if !LWIP_NETIF_HWADDRHINT +static netif_addr_idx_t etharp_cached_entry; +#endif /* !LWIP_NETIF_HWADDRHINT */ + +/** Try hard to create a new entry - we want the IP address to appear in + the cache (even if this means removing an active entry or so). */ +#define ETHARP_FLAG_TRY_HARD 1 +#define ETHARP_FLAG_FIND_ONLY 2 +#if ETHARP_SUPPORT_STATIC_ENTRIES +#define ETHARP_FLAG_STATIC_ENTRY 4 +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */ + +#if LWIP_NETIF_HWADDRHINT +#define ETHARP_SET_ADDRHINT(netif, addrhint) do { if (((netif) != NULL) && ((netif)->hints != NULL)) { \ + (netif)->hints->addr_hint = (addrhint); }} while(0) +#else /* LWIP_NETIF_HWADDRHINT */ +#define ETHARP_SET_ADDRHINT(netif, addrhint) (etharp_cached_entry = (addrhint)) +#endif /* LWIP_NETIF_HWADDRHINT */ + + +/* Check for maximum ARP_TABLE_SIZE */ +#if (ARP_TABLE_SIZE > NETIF_ADDR_IDX_MAX) +#error "ARP_TABLE_SIZE must fit in an s16_t, you have to reduce it in your lwipopts.h" +#endif + + +static err_t etharp_request_dst(struct netif *netif, const ip4_addr_t *ipaddr, const struct eth_addr *hw_dst_addr); +static err_t etharp_raw(struct netif *netif, + const struct eth_addr *ethsrc_addr, const struct eth_addr *ethdst_addr, + const struct eth_addr *hwsrc_addr, const ip4_addr_t *ipsrc_addr, + const struct eth_addr *hwdst_addr, const ip4_addr_t *ipdst_addr, + const u16_t opcode); + +#if ARP_QUEUEING +/** + * Free a complete queue of etharp entries + * + * @param q a queue of etharp_q_entry's to free + */ +static void +free_etharp_q(struct etharp_q_entry *q) +{ + struct etharp_q_entry *r; + LWIP_ASSERT("q != NULL", q != NULL); + while (q) { + r = q; + q = q->next; + LWIP_ASSERT("r->p != NULL", (r->p != NULL)); + pbuf_free(r->p); + memp_free(MEMP_ARP_QUEUE, r); + } +} +#else /* ARP_QUEUEING */ + +/** Compatibility define: free the queued pbuf */ +#define free_etharp_q(q) pbuf_free(q) + +#endif /* ARP_QUEUEING */ + +/** Clean up ARP table entries */ +static void +etharp_free_entry(int i) +{ + /* remove from SNMP ARP index tree */ + mib2_remove_arp_entry(arp_table[i].netif, &arp_table[i].ipaddr); + /* and empty packet queue */ + if (arp_table[i].q != NULL) { + /* remove all queued packets */ + LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_free_entry: freeing entry %"U16_F", packet queue %p.\n", (u16_t)i, (void *)(arp_table[i].q))); + free_etharp_q(arp_table[i].q); + arp_table[i].q = NULL; + } + /* recycle entry for re-use */ + arp_table[i].state = ETHARP_STATE_EMPTY; +#ifdef LWIP_DEBUG + /* for debugging, clean out the complete entry */ + arp_table[i].ctime = 0; + arp_table[i].netif = NULL; + ip4_addr_set_zero(&arp_table[i].ipaddr); + arp_table[i].ethaddr = ethzero; +#endif /* LWIP_DEBUG */ +} + +/** + * Clears expired entries in the ARP table. + * + * This function should be called every ARP_TMR_INTERVAL milliseconds (1 second), + * in order to expire entries in the ARP table. + */ +void +etharp_tmr(void) +{ + int i; + + LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer\n")); + /* remove expired entries from the ARP table */ + for (i = 0; i < ARP_TABLE_SIZE; ++i) { + u8_t state = arp_table[i].state; + if (state != ETHARP_STATE_EMPTY +#if ETHARP_SUPPORT_STATIC_ENTRIES + && (state != ETHARP_STATE_STATIC) +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */ + ) { + arp_table[i].ctime++; + if ((arp_table[i].ctime >= ARP_MAXAGE) || + ((arp_table[i].state == ETHARP_STATE_PENDING) && + (arp_table[i].ctime >= ARP_MAXPENDING))) { + /* pending or stable entry has become old! */ + LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer: expired %s entry %d.\n", + arp_table[i].state >= ETHARP_STATE_STABLE ? "stable" : "pending", i)); + /* clean up entries that have just been expired */ + etharp_free_entry(i); + } else if (arp_table[i].state == ETHARP_STATE_STABLE_REREQUESTING_1) { + /* Don't send more than one request every 2 seconds. */ + arp_table[i].state = ETHARP_STATE_STABLE_REREQUESTING_2; + } else if (arp_table[i].state == ETHARP_STATE_STABLE_REREQUESTING_2) { + /* Reset state to stable, so that the next transmitted packet will + re-send an ARP request. */ + arp_table[i].state = ETHARP_STATE_STABLE; + } else if (arp_table[i].state == ETHARP_STATE_PENDING) { + /* still pending, resend an ARP query */ + etharp_request(arp_table[i].netif, &arp_table[i].ipaddr); + } + } + } +} + +/** + * Search the ARP table for a matching or new entry. + * + * If an IP address is given, return a pending or stable ARP entry that matches + * the address. If no match is found, create a new entry with this address set, + * but in state ETHARP_EMPTY. The caller must check and possibly change the + * state of the returned entry. + * + * If ipaddr is NULL, return a initialized new entry in state ETHARP_EMPTY. + * + * In all cases, attempt to create new entries from an empty entry. If no + * empty entries are available and ETHARP_FLAG_TRY_HARD flag is set, recycle + * old entries. Heuristic choose the least important entry for recycling. + * + * @param ipaddr IP address to find in ARP cache, or to add if not found. + * @param flags See @ref etharp_state + * @param netif netif related to this address (used for NETIF_HWADDRHINT) + * + * @return The ARP entry index that matched or is created, ERR_MEM if no + * entry is found or could be recycled. + */ +static s16_t +etharp_find_entry(const ip4_addr_t *ipaddr, u8_t flags, struct netif *netif) +{ + s16_t old_pending = ARP_TABLE_SIZE, old_stable = ARP_TABLE_SIZE; + s16_t empty = ARP_TABLE_SIZE; + s16_t i = 0; + /* oldest entry with packets on queue */ + s16_t old_queue = ARP_TABLE_SIZE; + /* its age */ + u16_t age_queue = 0, age_pending = 0, age_stable = 0; + + LWIP_UNUSED_ARG(netif); + + /** + * a) do a search through the cache, remember candidates + * b) select candidate entry + * c) create new entry + */ + + /* a) in a single search sweep, do all of this + * 1) remember the first empty entry (if any) + * 2) remember the oldest stable entry (if any) + * 3) remember the oldest pending entry without queued packets (if any) + * 4) remember the oldest pending entry with queued packets (if any) + * 5) search for a matching IP entry, either pending or stable + * until 5 matches, or all entries are searched for. + */ + + for (i = 0; i < ARP_TABLE_SIZE; ++i) { + u8_t state = arp_table[i].state; + /* no empty entry found yet and now we do find one? */ + if ((empty == ARP_TABLE_SIZE) && (state == ETHARP_STATE_EMPTY)) { + LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_find_entry: found empty entry %d\n", (int)i)); + /* remember first empty entry */ + empty = i; + } else if (state != ETHARP_STATE_EMPTY) { + LWIP_ASSERT("state == ETHARP_STATE_PENDING || state >= ETHARP_STATE_STABLE", + state == ETHARP_STATE_PENDING || state >= ETHARP_STATE_STABLE); + /* if given, does IP address match IP address in ARP entry? */ + if (ipaddr && ip4_addr_eq(ipaddr, &arp_table[i].ipaddr) +#if ETHARP_TABLE_MATCH_NETIF + && ((netif == NULL) || (netif == arp_table[i].netif)) +#endif /* ETHARP_TABLE_MATCH_NETIF */ + ) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_find_entry: found matching entry %d\n", (int)i)); + /* found exact IP address match, simply bail out */ + return i; + } + /* pending entry? */ + if (state == ETHARP_STATE_PENDING) { + /* pending with queued packets? */ + if (arp_table[i].q != NULL) { + if (arp_table[i].ctime >= age_queue) { + old_queue = i; + age_queue = arp_table[i].ctime; + } + } else + /* pending without queued packets? */ + { + if (arp_table[i].ctime >= age_pending) { + old_pending = i; + age_pending = arp_table[i].ctime; + } + } + /* stable entry? */ + } else if (state >= ETHARP_STATE_STABLE) { +#if ETHARP_SUPPORT_STATIC_ENTRIES + /* don't record old_stable for static entries since they never expire */ + if (state < ETHARP_STATE_STATIC) +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */ + { + /* remember entry with oldest stable entry in oldest, its age in maxtime */ + if (arp_table[i].ctime >= age_stable) { + old_stable = i; + age_stable = arp_table[i].ctime; + } + } + } + } + } + /* { we have no match } => try to create a new entry */ + + /* don't create new entry, only search? */ + if (((flags & ETHARP_FLAG_FIND_ONLY) != 0) || + /* or no empty entry found and not allowed to recycle? */ + ((empty == ARP_TABLE_SIZE) && ((flags & ETHARP_FLAG_TRY_HARD) == 0))) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_find_entry: no empty entry found and not allowed to recycle\n")); + return (s16_t)ERR_MEM; + } + + /* b) choose the least destructive entry to recycle: + * 1) empty entry + * 2) oldest stable entry + * 3) oldest pending entry without queued packets + * 4) oldest pending entry with queued packets + * + * { ETHARP_FLAG_TRY_HARD is set at this point } + */ + + /* 1) empty entry available? */ + if (empty < ARP_TABLE_SIZE) { + i = empty; + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_find_entry: selecting empty entry %d\n", (int)i)); + } else { + /* 2) found recyclable stable entry? */ + if (old_stable < ARP_TABLE_SIZE) { + /* recycle oldest stable*/ + i = old_stable; + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_find_entry: selecting oldest stable entry %d\n", (int)i)); + /* no queued packets should exist on stable entries */ + LWIP_ASSERT("arp_table[i].q == NULL", arp_table[i].q == NULL); + /* 3) found recyclable pending entry without queued packets? */ + } else if (old_pending < ARP_TABLE_SIZE) { + /* recycle oldest pending */ + i = old_pending; + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_find_entry: selecting oldest pending entry %d (without queue)\n", (int)i)); + /* 4) found recyclable pending entry with queued packets? */ + } else if (old_queue < ARP_TABLE_SIZE) { + /* recycle oldest pending (queued packets are free in etharp_free_entry) */ + i = old_queue; + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_find_entry: selecting oldest pending entry %d, freeing packet queue %p\n", (int)i, (void *)(arp_table[i].q))); + /* no empty or recyclable entries found */ + } else { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_find_entry: no empty or recyclable entries found\n")); + return (s16_t)ERR_MEM; + } + + /* { empty or recyclable entry found } */ + LWIP_ASSERT("i < ARP_TABLE_SIZE", i < ARP_TABLE_SIZE); + etharp_free_entry(i); + } + + LWIP_ASSERT("i < ARP_TABLE_SIZE", i < ARP_TABLE_SIZE); + LWIP_ASSERT("arp_table[i].state == ETHARP_STATE_EMPTY", + arp_table[i].state == ETHARP_STATE_EMPTY); + + /* IP address given? */ + if (ipaddr != NULL) { + /* set IP address */ + ip4_addr_copy(arp_table[i].ipaddr, *ipaddr); + } + arp_table[i].ctime = 0; +#if ETHARP_TABLE_MATCH_NETIF + arp_table[i].netif = netif; +#endif /* ETHARP_TABLE_MATCH_NETIF */ + return (s16_t)i; +} + +/** + * Update (or insert) a IP/MAC address pair in the ARP cache. + * + * If a pending entry is resolved, any queued packets will be sent + * at this point. + * + * @param netif netif related to this entry (used for NETIF_ADDRHINT) + * @param ipaddr IP address of the inserted ARP entry. + * @param ethaddr Ethernet address of the inserted ARP entry. + * @param flags See @ref etharp_state + * + * @return + * - ERR_OK Successfully updated ARP cache. + * - ERR_MEM If we could not add a new ARP entry when ETHARP_FLAG_TRY_HARD was set. + * - ERR_ARG Non-unicast address given, those will not appear in ARP cache. + * + * @see pbuf_free() + */ +static err_t +etharp_update_arp_entry(struct netif *netif, const ip4_addr_t *ipaddr, struct eth_addr *ethaddr, u8_t flags) +{ + s16_t i; + LWIP_ASSERT("netif->hwaddr_len == ETH_HWADDR_LEN", netif->hwaddr_len == ETH_HWADDR_LEN); + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_update_arp_entry: %"U16_F".%"U16_F".%"U16_F".%"U16_F" - %02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F"\n", + ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr), + (u16_t)ethaddr->addr[0], (u16_t)ethaddr->addr[1], (u16_t)ethaddr->addr[2], + (u16_t)ethaddr->addr[3], (u16_t)ethaddr->addr[4], (u16_t)ethaddr->addr[5])); + /* non-unicast address? */ + if (ip4_addr_isany(ipaddr) || + ip4_addr_isbroadcast(ipaddr, netif) || + ip4_addr_ismulticast(ipaddr)) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_update_arp_entry: will not add non-unicast IP address to ARP cache\n")); + return ERR_ARG; + } + /* find or create ARP entry */ + i = etharp_find_entry(ipaddr, flags, netif); + /* bail out if no entry could be found */ + if (i < 0) { + return (err_t)i; + } + +#if ETHARP_SUPPORT_STATIC_ENTRIES + if (flags & ETHARP_FLAG_STATIC_ENTRY) { + /* record static type */ + arp_table[i].state = ETHARP_STATE_STATIC; + } else if (arp_table[i].state == ETHARP_STATE_STATIC) { + /* found entry is a static type, don't overwrite it */ + return ERR_VAL; + } else +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */ + { + /* mark it stable */ + arp_table[i].state = ETHARP_STATE_STABLE; + } + + /* record network interface */ + arp_table[i].netif = netif; + /* insert in SNMP ARP index tree */ + mib2_add_arp_entry(netif, &arp_table[i].ipaddr); + + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_update_arp_entry: updating stable entry %"S16_F"\n", i)); + /* update address */ + SMEMCPY(&arp_table[i].ethaddr, ethaddr, ETH_HWADDR_LEN); + /* reset time stamp */ + arp_table[i].ctime = 0; + /* this is where we will send out queued packets! */ +#if ARP_QUEUEING + while (arp_table[i].q != NULL) { + struct pbuf *p; + /* remember remainder of queue */ + struct etharp_q_entry *q = arp_table[i].q; + /* pop first item off the queue */ + arp_table[i].q = q->next; + /* get the packet pointer */ + p = q->p; + /* now queue entry can be freed */ + memp_free(MEMP_ARP_QUEUE, q); +#else /* ARP_QUEUEING */ + if (arp_table[i].q != NULL) { + struct pbuf *p = arp_table[i].q; + arp_table[i].q = NULL; +#endif /* ARP_QUEUEING */ + /* send the queued IP packet */ + ethernet_output(netif, p, (struct eth_addr *)(netif->hwaddr), ethaddr, ETHTYPE_IP); + /* free the queued IP packet */ + pbuf_free(p); + } + return ERR_OK; +} + +#if ETHARP_SUPPORT_STATIC_ENTRIES +/** Add a new static entry to the ARP table. If an entry exists for the + * specified IP address, this entry is overwritten. + * If packets are queued for the specified IP address, they are sent out. + * + * @param ipaddr IP address for the new static entry + * @param ethaddr ethernet address for the new static entry + * @return See return values of etharp_add_static_entry + */ +err_t +etharp_add_static_entry(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr) +{ + struct netif *netif; + LWIP_ASSERT_CORE_LOCKED(); + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_add_static_entry: %"U16_F".%"U16_F".%"U16_F".%"U16_F" - %02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F"\n", + ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr), + (u16_t)ethaddr->addr[0], (u16_t)ethaddr->addr[1], (u16_t)ethaddr->addr[2], + (u16_t)ethaddr->addr[3], (u16_t)ethaddr->addr[4], (u16_t)ethaddr->addr[5])); + + netif = ip4_route(ipaddr); + if (netif == NULL) { + return ERR_RTE; + } + + return etharp_update_arp_entry(netif, ipaddr, ethaddr, ETHARP_FLAG_TRY_HARD | ETHARP_FLAG_STATIC_ENTRY); +} + +/** Remove a static entry from the ARP table previously added with a call to + * etharp_add_static_entry. + * + * @param ipaddr IP address of the static entry to remove + * @return ERR_OK: entry removed + * ERR_MEM: entry wasn't found + * ERR_ARG: entry wasn't a static entry but a dynamic one + */ +err_t +etharp_remove_static_entry(const ip4_addr_t *ipaddr) +{ + s16_t i; + LWIP_ASSERT_CORE_LOCKED(); + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_remove_static_entry: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr))); + + /* find or create ARP entry */ + i = etharp_find_entry(ipaddr, ETHARP_FLAG_FIND_ONLY, NULL); + /* bail out if no entry could be found */ + if (i < 0) { + return (err_t)i; + } + + if (arp_table[i].state != ETHARP_STATE_STATIC) { + /* entry wasn't a static entry, cannot remove it */ + return ERR_ARG; + } + /* entry found, free it */ + etharp_free_entry(i); + return ERR_OK; +} +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */ + +/** + * Remove all ARP table entries of the specified netif. + * + * @param netif points to a network interface + */ +void +etharp_cleanup_netif(struct netif *netif) +{ + int i; + + for (i = 0; i < ARP_TABLE_SIZE; ++i) { + u8_t state = arp_table[i].state; + if ((state != ETHARP_STATE_EMPTY) && (arp_table[i].netif == netif)) { + etharp_free_entry(i); + } + } +} + +/** + * Finds (stable) ethernet/IP address pair from ARP table + * using interface and IP address index. + * @note the addresses in the ARP table are in network order! + * + * @param netif points to interface index + * @param ipaddr points to the (network order) IP address index + * @param eth_ret points to return pointer + * @param ip_ret points to return pointer + * @return table index if found, -1 otherwise + */ +ssize_t +etharp_find_addr(struct netif *netif, const ip4_addr_t *ipaddr, + struct eth_addr **eth_ret, const ip4_addr_t **ip_ret) +{ + s16_t i; + + LWIP_ASSERT("eth_ret != NULL && ip_ret != NULL", + eth_ret != NULL && ip_ret != NULL); + + LWIP_UNUSED_ARG(netif); + + i = etharp_find_entry(ipaddr, ETHARP_FLAG_FIND_ONLY, netif); + if ((i >= 0) && (arp_table[i].state >= ETHARP_STATE_STABLE)) { + *eth_ret = &arp_table[i].ethaddr; + *ip_ret = &arp_table[i].ipaddr; + return i; + } + return -1; +} + +/** + * Possibility to iterate over stable ARP table entries + * + * @param i entry number, 0 to ARP_TABLE_SIZE + * @param ipaddr return value: IP address + * @param netif return value: points to interface + * @param eth_ret return value: ETH address + * @return 1 on valid index, 0 otherwise + */ +int +etharp_get_entry(size_t i, ip4_addr_t **ipaddr, struct netif **netif, struct eth_addr **eth_ret) +{ + LWIP_ASSERT("ipaddr != NULL", ipaddr != NULL); + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_ASSERT("eth_ret != NULL", eth_ret != NULL); + + if ((i < ARP_TABLE_SIZE) && (arp_table[i].state >= ETHARP_STATE_STABLE)) { + *ipaddr = &arp_table[i].ipaddr; + *netif = arp_table[i].netif; + *eth_ret = &arp_table[i].ethaddr; + return 1; + } else { + return 0; + } +} + +/** + * Responds to ARP requests to us. Upon ARP replies to us, add entry to cache + * send out queued IP packets. Updates cache with snooped address pairs. + * + * Should be called for incoming ARP packets. The pbuf in the argument + * is freed by this function. + * + * @param p The ARP packet that arrived on netif. Is freed by this function. + * @param netif The lwIP network interface on which the ARP packet pbuf arrived. + * + * @see pbuf_free() + */ +void +etharp_input(struct pbuf *p, struct netif *netif) +{ + struct etharp_hdr *hdr; + /* these are aligned properly, whereas the ARP header fields might not be */ + ip4_addr_t sipaddr, dipaddr; + u8_t for_us, from_us; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("netif != NULL", (netif != NULL), return;); + + hdr = (struct etharp_hdr *)p->payload; + + /* RFC 826 "Packet Reception": */ + if ((hdr->hwtype != PP_HTONS(LWIP_IANA_HWTYPE_ETHERNET)) || + (hdr->hwlen != ETH_HWADDR_LEN) || + (hdr->protolen != sizeof(ip4_addr_t)) || + (hdr->proto != PP_HTONS(ETHTYPE_IP))) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, + ("etharp_input: packet dropped, wrong hw type, hwlen, proto, protolen or ethernet type (%"U16_F"/%"U16_F"/%"U16_F"/%"U16_F")\n", + hdr->hwtype, (u16_t)hdr->hwlen, hdr->proto, (u16_t)hdr->protolen)); + ETHARP_STATS_INC(etharp.proterr); + ETHARP_STATS_INC(etharp.drop); + pbuf_free(p); + return; + } + ETHARP_STATS_INC(etharp.recv); + +#if LWIP_ACD + /* We have to check if a host already has configured our ip address and + * continuously check if there is a host with this IP-address so we can + * detect collisions. + * acd_arp_reply ensures the detection of conflicts. It will handle possible + * defending or retreating and will make sure a new IP address is selected. + * etharp_input does not need to handle packets that originate "from_us". + */ + acd_arp_reply(netif, hdr); +#endif /* LWIP_ACD */ + + /* Copy struct ip4_addr_wordaligned to aligned ip4_addr, to support compilers without + * structure packing (not using structure copy which breaks strict-aliasing rules). */ + IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T(&sipaddr, &hdr->sipaddr); + IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T(&dipaddr, &hdr->dipaddr); + + /* this interface is not configured? */ + if (ip4_addr_isany_val(*netif_ip4_addr(netif))) { + for_us = 0; + from_us = 0; + } else { + /* ARP packet directed to us? */ + for_us = (u8_t)ip4_addr_eq(&dipaddr, netif_ip4_addr(netif)); + /* ARP packet from us? */ + from_us = (u8_t)ip4_addr_eq(&sipaddr, netif_ip4_addr(netif)); + } + + /* ARP message directed to us? + -> add IP address in ARP cache; assume requester wants to talk to us, + can result in directly sending the queued packets for this host. + ARP message not directed to us? + -> update the source IP address in the cache, if present */ + etharp_update_arp_entry(netif, &sipaddr, &(hdr->shwaddr), + for_us ? ETHARP_FLAG_TRY_HARD : ETHARP_FLAG_FIND_ONLY); + + /* now act on the message itself */ + switch (hdr->opcode) { + /* ARP request? */ + case PP_HTONS(ARP_REQUEST): + /* ARP request. If it asked for our address, we send out a + * reply. In any case, we time-stamp any existing ARP entry, + * and possibly send out an IP packet that was queued on it. */ + + LWIP_DEBUGF (ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_input: incoming ARP request\n")); + /* ARP request for our address? */ + if (for_us && !from_us) { + /* send ARP response */ + etharp_raw(netif, + (struct eth_addr *)netif->hwaddr, &hdr->shwaddr, + (struct eth_addr *)netif->hwaddr, netif_ip4_addr(netif), + &hdr->shwaddr, &sipaddr, + ARP_REPLY); + /* we are not configured? */ + } else if (ip4_addr_isany_val(*netif_ip4_addr(netif))) { + /* { for_us == 0 and netif->ip_addr.addr == 0 } */ + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_input: we are unconfigured, ARP request ignored.\n")); + /* request was not directed to us */ + } else { + /* { for_us == 0 and netif->ip_addr.addr != 0 } */ + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_input: ARP request was not for us.\n")); + } + break; + case PP_HTONS(ARP_REPLY): + /* ARP reply. We already updated the ARP cache earlier. */ + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_input: incoming ARP reply\n")); + break; + default: + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_input: ARP unknown opcode type %"S16_F"\n", lwip_htons(hdr->opcode))); + ETHARP_STATS_INC(etharp.err); + break; + } + /* free ARP packet */ + pbuf_free(p); +} + +/** Just a small helper function that sends a pbuf to an ethernet address + * in the arp_table specified by the index 'arp_idx'. + */ +static err_t +etharp_output_to_arp_index(struct netif *netif, struct pbuf *q, netif_addr_idx_t arp_idx) +{ + LWIP_ASSERT("arp_table[arp_idx].state >= ETHARP_STATE_STABLE", + arp_table[arp_idx].state >= ETHARP_STATE_STABLE); + /* if arp table entry is about to expire: re-request it, + but only if its state is ETHARP_STATE_STABLE to prevent flooding the + network with ARP requests if this address is used frequently. */ + if (arp_table[arp_idx].state == ETHARP_STATE_STABLE) { + if (arp_table[arp_idx].ctime >= ARP_AGE_REREQUEST_USED_BROADCAST) { + /* issue a standard request using broadcast */ + if (etharp_request(netif, &arp_table[arp_idx].ipaddr) == ERR_OK) { + arp_table[arp_idx].state = ETHARP_STATE_STABLE_REREQUESTING_1; + } + } else if (arp_table[arp_idx].ctime >= ARP_AGE_REREQUEST_USED_UNICAST) { + /* issue a unicast request (for 15 seconds) to prevent unnecessary broadcast */ + if (etharp_request_dst(netif, &arp_table[arp_idx].ipaddr, &arp_table[arp_idx].ethaddr) == ERR_OK) { + arp_table[arp_idx].state = ETHARP_STATE_STABLE_REREQUESTING_1; + } + } + } + + return ethernet_output(netif, q, (struct eth_addr *)(netif->hwaddr), &arp_table[arp_idx].ethaddr, ETHTYPE_IP); +} + +/** + * Resolve and fill-in Ethernet address header for outgoing IP packet. + * + * For IP multicast and broadcast, corresponding Ethernet addresses + * are selected and the packet is transmitted on the link. + * + * For unicast addresses, the packet is submitted to etharp_query(). In + * case the IP address is outside the local network, the IP address of + * the gateway is used. + * + * @param netif The lwIP network interface which the IP packet will be sent on. + * @param q The pbuf(s) containing the IP packet to be sent. + * @param ipaddr The IP address of the packet destination. + * + * @return + * - ERR_RTE No route to destination (no gateway to external networks), + * or the return type of either etharp_query() or ethernet_output(). + */ +err_t +etharp_output(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr) +{ + const struct eth_addr *dest; + struct eth_addr mcastaddr; + const ip4_addr_t *dst_addr = ipaddr; + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_ASSERT("q != NULL", q != NULL); + LWIP_ASSERT("ipaddr != NULL", ipaddr != NULL); + + /* Determine on destination hardware address. Broadcasts and multicasts + * are special, other IP addresses are looked up in the ARP table. */ + + /* broadcast destination IP address? */ + if (ip4_addr_isbroadcast(ipaddr, netif)) { + /* broadcast on Ethernet also */ + dest = (const struct eth_addr *)&ethbroadcast; + /* multicast destination IP address? */ + } else if (ip4_addr_ismulticast(ipaddr)) { + /* Hash IP multicast address to MAC address.*/ + mcastaddr.addr[0] = LL_IP4_MULTICAST_ADDR_0; + mcastaddr.addr[1] = LL_IP4_MULTICAST_ADDR_1; + mcastaddr.addr[2] = LL_IP4_MULTICAST_ADDR_2; + mcastaddr.addr[3] = ip4_addr2(ipaddr) & 0x7f; + mcastaddr.addr[4] = ip4_addr3(ipaddr); + mcastaddr.addr[5] = ip4_addr4(ipaddr); + /* destination Ethernet address is multicast */ + dest = &mcastaddr; + /* unicast destination IP address? */ + } else { + netif_addr_idx_t i; + /* outside local network? if so, this can neither be a global broadcast nor + a subnet broadcast. */ + if (!ip4_addr_net_eq(ipaddr, netif_ip4_addr(netif), netif_ip4_netmask(netif)) && + !ip4_addr_islinklocal(ipaddr)) { +#if LWIP_AUTOIP + struct ip_hdr *iphdr = LWIP_ALIGNMENT_CAST(struct ip_hdr *, q->payload); + /* According to RFC 3297, chapter 2.6.2 (Forwarding Rules), a packet with + a link-local source address must always be "directly to its destination + on the same physical link. The host MUST NOT send the packet to any + router for forwarding". */ + if (!ip4_addr_islinklocal(&iphdr->src)) +#endif /* LWIP_AUTOIP */ + { +#ifdef LWIP_HOOK_ETHARP_GET_GW + /* For advanced routing, a single default gateway might not be enough, so get + the IP address of the gateway to handle the current destination address. */ + dst_addr = LWIP_HOOK_ETHARP_GET_GW(netif, ipaddr); + if (dst_addr == NULL) +#endif /* LWIP_HOOK_ETHARP_GET_GW */ + { + /* interface has default gateway? */ + if (!ip4_addr_isany_val(*netif_ip4_gw(netif))) { + /* send to hardware address of default gateway IP address */ + dst_addr = netif_ip4_gw(netif); + /* no default gateway available */ + } else { + /* no route to destination error (default gateway missing) */ + return ERR_RTE; + } + } + } + } +#if LWIP_NETIF_HWADDRHINT + if (netif->hints != NULL) { + /* per-pcb cached entry was given */ + netif_addr_idx_t etharp_cached_entry = netif->hints->addr_hint; + if (etharp_cached_entry < ARP_TABLE_SIZE) { +#endif /* LWIP_NETIF_HWADDRHINT */ + if ((arp_table[etharp_cached_entry].state >= ETHARP_STATE_STABLE) && +#if ETHARP_TABLE_MATCH_NETIF + (arp_table[etharp_cached_entry].netif == netif) && +#endif + (ip4_addr_eq(dst_addr, &arp_table[etharp_cached_entry].ipaddr))) { + /* the per-pcb-cached entry is stable and the right one! */ + ETHARP_STATS_INC(etharp.cachehit); + return etharp_output_to_arp_index(netif, q, etharp_cached_entry); + } +#if LWIP_NETIF_HWADDRHINT + } + } +#endif /* LWIP_NETIF_HWADDRHINT */ + + /* find stable entry: do this here since this is a critical path for + throughput and etharp_find_entry() is kind of slow */ + for (i = 0; i < ARP_TABLE_SIZE; i++) { + if ((arp_table[i].state >= ETHARP_STATE_STABLE) && +#if ETHARP_TABLE_MATCH_NETIF + (arp_table[i].netif == netif) && +#endif + (ip4_addr_eq(dst_addr, &arp_table[i].ipaddr))) { + /* found an existing, stable entry */ + ETHARP_SET_ADDRHINT(netif, i); + return etharp_output_to_arp_index(netif, q, i); + } + } + /* no stable entry found, use the (slower) query function: + queue on destination Ethernet address belonging to ipaddr */ + return etharp_query(netif, dst_addr, q); + } + + /* continuation for multicast/broadcast destinations */ + /* obtain source Ethernet address of the given interface */ + /* send packet directly on the link */ + return ethernet_output(netif, q, (struct eth_addr *)(netif->hwaddr), dest, ETHTYPE_IP); +} + +/** + * Send an ARP request for the given IP address and/or queue a packet. + * + * If the IP address was not yet in the cache, a pending ARP cache entry + * is added and an ARP request is sent for the given address. The packet + * is queued on this entry. + * + * If the IP address was already pending in the cache, a new ARP request + * is sent for the given address. The packet is queued on this entry. + * + * If the IP address was already stable in the cache, and a packet is + * given, it is directly sent and no ARP request is sent out. + * + * If the IP address was already stable in the cache, and no packet is + * given, an ARP request is sent out. + * + * @param netif The lwIP network interface on which ipaddr + * must be queried for. + * @param ipaddr The IP address to be resolved. + * @param q If non-NULL, a pbuf that must be delivered to the IP address. + * q is not freed by this function. + * + * @note q must only be ONE packet, not a packet queue! + * + * @return + * - ERR_BUF Could not make room for Ethernet header. + * - ERR_MEM Hardware address unknown, and no more ARP entries available + * to query for address or queue the packet. + * - ERR_MEM Could not queue packet due to memory shortage. + * - ERR_RTE No route to destination (no gateway to external networks). + * - ERR_ARG Non-unicast address given, those will not appear in ARP cache. + * + */ +err_t +etharp_query(struct netif *netif, const ip4_addr_t *ipaddr, struct pbuf *q) +{ + struct eth_addr *srcaddr = (struct eth_addr *)netif->hwaddr; + err_t result = ERR_MEM; + int is_new_entry = 0; + s16_t i_err; + netif_addr_idx_t i; + + /* non-unicast address? */ + if (ip4_addr_isbroadcast(ipaddr, netif) || + ip4_addr_ismulticast(ipaddr) || + ip4_addr_isany(ipaddr)) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: will not add non-unicast IP address to ARP cache\n")); + return ERR_ARG; + } + + /* find entry in ARP cache, ask to create entry if queueing packet */ + i_err = etharp_find_entry(ipaddr, ETHARP_FLAG_TRY_HARD, netif); + + /* could not find or create entry? */ + if (i_err < 0) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: could not create ARP entry\n")); + if (q) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: packet dropped\n")); + ETHARP_STATS_INC(etharp.memerr); + } + return (err_t)i_err; + } + LWIP_ASSERT("type overflow", (size_t)i_err < NETIF_ADDR_IDX_MAX); + i = (netif_addr_idx_t)i_err; + + /* mark a fresh entry as pending (we just sent a request) */ + if (arp_table[i].state == ETHARP_STATE_EMPTY) { + is_new_entry = 1; + arp_table[i].state = ETHARP_STATE_PENDING; + /* record network interface for re-sending arp request in etharp_tmr */ + arp_table[i].netif = netif; + } + + /* { i is either a STABLE or (new or existing) PENDING entry } */ + LWIP_ASSERT("arp_table[i].state == PENDING or STABLE", + ((arp_table[i].state == ETHARP_STATE_PENDING) || + (arp_table[i].state >= ETHARP_STATE_STABLE))); + + /* do we have a new entry? or an implicit query request? */ + if (is_new_entry || (q == NULL)) { + /* try to resolve it; send out ARP request */ + result = etharp_request(netif, ipaddr); + if (result != ERR_OK) { + /* ARP request couldn't be sent */ + /* We don't re-send arp request in etharp_tmr, but we still queue packets, + since this failure could be temporary, and the next packet calling + etharp_query again could lead to sending the queued packets. */ + } else { + /* ARP request successfully sent */ + if ((arp_table[i].state == ETHARP_STATE_PENDING) && !is_new_entry) { + /* A new ARP request has been sent for a pending entry. Reset the ctime to + not let it expire too fast. */ + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: reset ctime for entry %"S16_F"\n", (s16_t)i)); + arp_table[i].ctime = 0; + } + } + if (q == NULL) { + return result; + } + } + + /* packet given? */ + LWIP_ASSERT("q != NULL", q != NULL); + /* stable entry? */ + if (arp_table[i].state >= ETHARP_STATE_STABLE) { + /* we have a valid IP->Ethernet address mapping */ + ETHARP_SET_ADDRHINT(netif, i); + /* send the packet */ + result = ethernet_output(netif, q, srcaddr, &(arp_table[i].ethaddr), ETHTYPE_IP); + /* pending entry? (either just created or already pending */ + } else if (arp_table[i].state == ETHARP_STATE_PENDING) { + /* entry is still pending, queue the given packet 'q' */ + struct pbuf *p; + int copy_needed = 0; + /* IF q includes a pbuf that must be copied, copy the whole chain into a + * new PBUF_RAM. See the definition of PBUF_NEEDS_COPY for details. */ + p = q; + while (p) { + LWIP_ASSERT("no packet queues allowed!", (p->len != p->tot_len) || (p->next == NULL)); + if (PBUF_NEEDS_COPY(p)) { + copy_needed = 1; + break; + } + p = p->next; + } + if (copy_needed) { + /* copy the whole packet into new pbufs */ + p = pbuf_clone(PBUF_LINK, PBUF_RAM, q); + } else { + /* referencing the old pbuf is enough */ + p = q; + pbuf_ref(p); + } + /* packet could be taken over? */ + if (p != NULL) { + /* queue packet ... */ +#if ARP_QUEUEING + struct etharp_q_entry *new_entry; + /* allocate a new arp queue entry */ + new_entry = (struct etharp_q_entry *)memp_malloc(MEMP_ARP_QUEUE); + if (new_entry != NULL) { + unsigned int qlen = 0; + new_entry->next = NULL; + new_entry->p = p; + if (arp_table[i].q != NULL) { + /* queue was already existent, append the new entry to the end */ + struct etharp_q_entry *r; + r = arp_table[i].q; + qlen++; + while (r->next != NULL) { + r = r->next; + qlen++; + } + r->next = new_entry; + } else { + /* queue did not exist, first item in queue */ + arp_table[i].q = new_entry; + } +#if ARP_QUEUE_LEN + if (qlen >= ARP_QUEUE_LEN) { + struct etharp_q_entry *old; + old = arp_table[i].q; + arp_table[i].q = arp_table[i].q->next; + pbuf_free(old->p); + memp_free(MEMP_ARP_QUEUE, old); + } +#endif + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: queued packet %p on ARP entry %"U16_F"\n", (void *)q, i)); + result = ERR_OK; + } else { + /* the pool MEMP_ARP_QUEUE is empty */ + pbuf_free(p); + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: could not queue a copy of PBUF_REF packet %p (out of memory)\n", (void *)q)); + result = ERR_MEM; + } +#else /* ARP_QUEUEING */ + /* always queue one packet per ARP request only, freeing a previously queued packet */ + if (arp_table[i].q != NULL) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: dropped previously queued packet %p for ARP entry %"U16_F"\n", (void *)q, (u16_t)i)); + pbuf_free(arp_table[i].q); + } + arp_table[i].q = p; + result = ERR_OK; + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: queued packet %p on ARP entry %"U16_F"\n", (void *)q, (u16_t)i)); +#endif /* ARP_QUEUEING */ + } else { + ETHARP_STATS_INC(etharp.memerr); + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: could not queue a copy of PBUF_REF packet %p (out of memory)\n", (void *)q)); + result = ERR_MEM; + } + } + return result; +} + +/** + * Send a raw ARP packet (opcode and all addresses can be modified) + * + * @param netif the lwip network interface on which to send the ARP packet + * @param ethsrc_addr the source MAC address for the ethernet header + * @param ethdst_addr the destination MAC address for the ethernet header + * @param hwsrc_addr the source MAC address for the ARP protocol header + * @param ipsrc_addr the source IP address for the ARP protocol header + * @param hwdst_addr the destination MAC address for the ARP protocol header + * @param ipdst_addr the destination IP address for the ARP protocol header + * @param opcode the type of the ARP packet + * @return ERR_OK if the ARP packet has been sent + * ERR_MEM if the ARP packet couldn't be allocated + * any other err_t on failure + */ +static err_t +etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr, + const struct eth_addr *ethdst_addr, + const struct eth_addr *hwsrc_addr, const ip4_addr_t *ipsrc_addr, + const struct eth_addr *hwdst_addr, const ip4_addr_t *ipdst_addr, + const u16_t opcode) +{ + struct pbuf *p; + err_t result = ERR_OK; + struct etharp_hdr *hdr; + + LWIP_ASSERT("netif != NULL", netif != NULL); + + /* allocate a pbuf for the outgoing ARP request packet */ + p = pbuf_alloc(PBUF_LINK, SIZEOF_ETHARP_HDR, PBUF_RAM); + /* could allocate a pbuf for an ARP request? */ + if (p == NULL) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, + ("etharp_raw: could not allocate pbuf for ARP request.\n")); + ETHARP_STATS_INC(etharp.memerr); + return ERR_MEM; + } + LWIP_ASSERT("check that first pbuf can hold struct etharp_hdr", + (p->len >= SIZEOF_ETHARP_HDR)); + + hdr = (struct etharp_hdr *)p->payload; + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_raw: sending raw ARP packet.\n")); + hdr->opcode = lwip_htons(opcode); + + LWIP_ASSERT("netif->hwaddr_len must be the same as ETH_HWADDR_LEN for etharp!", + (netif->hwaddr_len == ETH_HWADDR_LEN)); + + /* Write the ARP MAC-Addresses */ + SMEMCPY(&hdr->shwaddr, hwsrc_addr, ETH_HWADDR_LEN); + SMEMCPY(&hdr->dhwaddr, hwdst_addr, ETH_HWADDR_LEN); + /* Copy struct ip4_addr_wordaligned to aligned ip4_addr, to support compilers without + * structure packing. */ + IPADDR_WORDALIGNED_COPY_FROM_IP4_ADDR_T(&hdr->sipaddr, ipsrc_addr); + IPADDR_WORDALIGNED_COPY_FROM_IP4_ADDR_T(&hdr->dipaddr, ipdst_addr); + + hdr->hwtype = PP_HTONS(LWIP_IANA_HWTYPE_ETHERNET); + hdr->proto = PP_HTONS(ETHTYPE_IP); + /* set hwlen and protolen */ + hdr->hwlen = ETH_HWADDR_LEN; + hdr->protolen = sizeof(ip4_addr_t); + + /* send ARP query */ +#if LWIP_AUTOIP + /* If we are using Link-Local, all ARP packets that contain a Link-Local + * 'sender IP address' MUST be sent using link-layer broadcast instead of + * link-layer unicast. (See RFC3927 Section 2.5, last paragraph) */ + if (ip4_addr_islinklocal(ipsrc_addr)) { + ethernet_output(netif, p, ethsrc_addr, &ethbroadcast, ETHTYPE_ARP); + } else +#endif /* LWIP_AUTOIP */ + { + ethernet_output(netif, p, ethsrc_addr, ethdst_addr, ETHTYPE_ARP); + } + + ETHARP_STATS_INC(etharp.xmit); + /* free ARP query packet */ + pbuf_free(p); + p = NULL; + /* could not allocate pbuf for ARP request */ + + return result; +} + +/** + * Send an ARP request packet asking for ipaddr to a specific eth address. + * Used to send unicast request to refresh the ARP table just before an entry + * times out + * + * @param netif the lwip network interface on which to send the request + * @param ipaddr the IP address for which to ask + * @param hw_dst_addr the ethernet address to send this packet to + * @return ERR_OK if the request has been sent + * ERR_MEM if the ARP packet couldn't be allocated + * any other err_t on failure + */ +static err_t +etharp_request_dst(struct netif *netif, const ip4_addr_t *ipaddr, const struct eth_addr *hw_dst_addr) +{ + return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, hw_dst_addr, + (struct eth_addr *)netif->hwaddr, netif_ip4_addr(netif), &ethzero, + ipaddr, ARP_REQUEST); +} + +/** + * Send an ARP request packet asking for ipaddr. + * + * @param netif the lwip network interface on which to send the request + * @param ipaddr the IP address for which to ask + * @return ERR_OK if the request has been sent + * ERR_MEM if the ARP packet couldn't be allocated + * any other err_t on failure + */ +err_t +etharp_request(struct netif *netif, const ip4_addr_t *ipaddr) +{ + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_request: sending ARP request.\n")); + return etharp_request_dst(netif, ipaddr, &ethbroadcast); +} + +#if LWIP_ACD +/** + * Send an ARP request packet probing for an ipaddr. + * Used to send probe messages for address conflict detection. + * + * @param netif the lwip network interface on which to send the request + * @param ipaddr the IP address to probe + * @return ERR_OK if the request has been sent + * ERR_MEM if the ARP packet couldn't be allocated + * any other err_t on failure + */ +err_t +etharp_acd_probe(struct netif *netif, const ip4_addr_t *ipaddr) +{ + return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, &ethbroadcast, + (struct eth_addr *)netif->hwaddr, IP4_ADDR_ANY4, &ethzero, + ipaddr, ARP_REQUEST); +} + +/** + * Send an ARP request packet announcing an ipaddr. + * Used to send announce messages for address conflict detection. + * + * @param netif the lwip network interface on which to send the request + * @param ipaddr the IP address to announce + * @return ERR_OK if the request has been sent + * ERR_MEM if the ARP packet couldn't be allocated + * any other err_t on failure + */ +err_t +etharp_acd_announce(struct netif *netif, const ip4_addr_t *ipaddr) +{ + return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, &ethbroadcast, + (struct eth_addr *)netif->hwaddr, ipaddr, &ethzero, + ipaddr, ARP_REQUEST); +} +#endif /* LWIP_ACD */ + +#endif /* LWIP_IPV4 && LWIP_ARP */ diff --git a/lib/lwip/core/ipv4/icmp.c b/lib/lwip/core/ipv4/icmp.c new file mode 100644 index 0000000000..9a82a67aa9 --- /dev/null +++ b/lib/lwip/core/ipv4/icmp.c @@ -0,0 +1,407 @@ +/** + * @file + * ICMP - Internet Control Message Protocol + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +/* Some ICMP messages should be passed to the transport protocols. This + is not implemented. */ + +#include "lwip/opt.h" + +#if LWIP_IPV4 && LWIP_ICMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/icmp.h" +#include "lwip/inet_chksum.h" +#include "lwip/ip.h" +#include "lwip/def.h" +#include "lwip/stats.h" + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +/** Small optimization: set to 0 if incoming PBUF_POOL pbuf always can be + * used to modify and send a response packet (and to 1 if this is not the case, + * e.g. when link header is stripped off when receiving) */ +#ifndef LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN +#define LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN 1 +#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */ + +/* The maximum amount of data from the original packet to return in a dest-unreachable */ +#define ICMP_DEST_UNREACH_DATASIZE 8 + +static void icmp_send_response(struct pbuf *p, u8_t type, u8_t code); + +/** + * Processes ICMP input packets, called from ip_input(). + * + * Currently only processes icmp echo requests and sends + * out the echo response. + * + * @param p the icmp echo request packet, p->payload pointing to the icmp header + * @param inp the netif on which this packet was received + */ +void +icmp_input(struct pbuf *p, struct netif *inp) +{ + u8_t type; +#ifdef LWIP_DEBUG + u8_t code; +#endif /* LWIP_DEBUG */ + struct icmp_echo_hdr *iecho; + const struct ip_hdr *iphdr_in; + u16_t hlen; + const ip4_addr_t *src; + + ICMP_STATS_INC(icmp.recv); + MIB2_STATS_INC(mib2.icmpinmsgs); + + iphdr_in = ip4_current_header(); + hlen = IPH_HL_BYTES(iphdr_in); + if (hlen < IP_HLEN) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: short IP header (%"S16_F" bytes) received\n", hlen)); + goto lenerr; + } + if (p->len < sizeof(u16_t) * 2) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: short ICMP (%"U16_F" bytes) received\n", p->tot_len)); + goto lenerr; + } + + type = *((u8_t *)p->payload); +#ifdef LWIP_DEBUG + code = *(((u8_t *)p->payload) + 1); + /* if debug is enabled but debug statement below is somehow disabled: */ + LWIP_UNUSED_ARG(code); +#endif /* LWIP_DEBUG */ + switch (type) { + case ICMP_ER: + /* This is OK, echo reply might have been parsed by a raw PCB + (as obviously, an echo request has been sent, too). */ + MIB2_STATS_INC(mib2.icmpinechoreps); + break; + case ICMP_ECHO: + MIB2_STATS_INC(mib2.icmpinechos); + src = ip4_current_dest_addr(); + /* multicast destination address? */ + if (ip4_addr_ismulticast(ip4_current_dest_addr())) { +#if LWIP_MULTICAST_PING + /* For multicast, use address of receiving interface as source address */ + src = netif_ip4_addr(inp); +#else /* LWIP_MULTICAST_PING */ + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: Not echoing to multicast pings\n")); + goto icmperr; +#endif /* LWIP_MULTICAST_PING */ + } + /* broadcast destination address? */ + if (ip4_addr_isbroadcast(ip4_current_dest_addr(), ip_current_netif())) { +#if LWIP_BROADCAST_PING + /* For broadcast, use address of receiving interface as source address */ + src = netif_ip4_addr(inp); +#else /* LWIP_BROADCAST_PING */ + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: Not echoing to broadcast pings\n")); + goto icmperr; +#endif /* LWIP_BROADCAST_PING */ + } + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ping\n")); + if (p->tot_len < sizeof(struct icmp_echo_hdr)) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: bad ICMP echo received\n")); + goto lenerr; + } +#if CHECKSUM_CHECK_ICMP + IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_CHECK_ICMP) { + if (inet_chksum_pbuf(p) != 0) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo\n")); + pbuf_free(p); + ICMP_STATS_INC(icmp.chkerr); + MIB2_STATS_INC(mib2.icmpinerrors); + return; + } + } +#endif +#if LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN + if (pbuf_add_header(p, hlen + PBUF_LINK_HLEN + PBUF_LINK_ENCAPSULATION_HLEN)) { + /* p is not big enough to contain link headers + * allocate a new one and copy p into it + */ + struct pbuf *r; + u16_t alloc_len = (u16_t)(p->tot_len + hlen); + if (alloc_len < p->tot_len) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: allocating new pbuf failed (tot_len overflow)\n")); + goto icmperr; + } + /* allocate new packet buffer with space for link headers */ + r = pbuf_alloc(PBUF_LINK, alloc_len, PBUF_RAM); + if (r == NULL) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: allocating new pbuf failed\n")); + goto icmperr; + } + if (r->len < hlen + sizeof(struct icmp_echo_hdr)) { + LWIP_DEBUGF(ICMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("first pbuf cannot hold the ICMP header\n")); + pbuf_free(r); + goto icmperr; + } + /* copy the ip header */ + MEMCPY(r->payload, iphdr_in, hlen); + /* switch r->payload back to icmp header (cannot fail) */ + if (pbuf_remove_header(r, hlen)) { + LWIP_ASSERT("icmp_input: moving r->payload to icmp header failed", 0); + pbuf_free(r); + goto icmperr; + } + /* copy the rest of the packet without ip header */ + if (pbuf_copy(r, p) != ERR_OK) { + LWIP_DEBUGF(ICMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("icmp_input: copying to new pbuf failed\n")); + pbuf_free(r); + goto icmperr; + } + /* free the original p */ + pbuf_free(p); + /* we now have an identical copy of p that has room for link headers */ + p = r; + } else { + /* restore p->payload to point to icmp header (cannot fail) */ + if (pbuf_remove_header(p, hlen + PBUF_LINK_HLEN + PBUF_LINK_ENCAPSULATION_HLEN)) { + LWIP_ASSERT("icmp_input: restoring original p->payload failed", 0); + goto icmperr; + } + } +#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */ + /* At this point, all checks are OK. */ + /* We generate an answer by switching the dest and src ip addresses, + * setting the icmp type to ECHO_RESPONSE and updating the checksum. */ + iecho = (struct icmp_echo_hdr *)p->payload; + if (pbuf_add_header(p, hlen)) { + LWIP_DEBUGF(ICMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("Can't move over header in packet\n")); + } else { + err_t ret; + struct ip_hdr *iphdr = (struct ip_hdr *)p->payload; + ip4_addr_copy(iphdr->src, *src); + ip4_addr_copy(iphdr->dest, *ip4_current_src_addr()); + ICMPH_TYPE_SET(iecho, ICMP_ER); +#if CHECKSUM_GEN_ICMP + IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_ICMP) { + /* adjust the checksum */ + if (iecho->chksum > PP_HTONS(0xffffU - (ICMP_ECHO << 8))) { + iecho->chksum = (u16_t)(iecho->chksum + PP_HTONS((u16_t)(ICMP_ECHO << 8)) + 1); + } else { + iecho->chksum = (u16_t)(iecho->chksum + PP_HTONS(ICMP_ECHO << 8)); + } + } +#if LWIP_CHECKSUM_CTRL_PER_NETIF + else { + iecho->chksum = 0; + } +#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */ +#else /* CHECKSUM_GEN_ICMP */ + iecho->chksum = 0; +#endif /* CHECKSUM_GEN_ICMP */ + + /* Set the correct TTL and recalculate the header checksum. */ + IPH_TTL_SET(iphdr, ICMP_TTL); + IPH_CHKSUM_SET(iphdr, 0); +#if CHECKSUM_GEN_IP + IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_IP) { + IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, hlen)); + } +#endif /* CHECKSUM_GEN_IP */ + + ICMP_STATS_INC(icmp.xmit); + /* increase number of messages attempted to send */ + MIB2_STATS_INC(mib2.icmpoutmsgs); + /* increase number of echo replies attempted to send */ + MIB2_STATS_INC(mib2.icmpoutechoreps); + + /* send an ICMP packet */ + ret = ip4_output_if(p, src, LWIP_IP_HDRINCL, + ICMP_TTL, 0, IP_PROTO_ICMP, inp); + if (ret != ERR_OK) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ip_output_if returned an error: %s\n", lwip_strerr(ret))); + } + } + break; + default: + if (type == ICMP_DUR) { + MIB2_STATS_INC(mib2.icmpindestunreachs); + } else if (type == ICMP_TE) { + MIB2_STATS_INC(mib2.icmpintimeexcds); + } else if (type == ICMP_PP) { + MIB2_STATS_INC(mib2.icmpinparmprobs); + } else if (type == ICMP_SQ) { + MIB2_STATS_INC(mib2.icmpinsrcquenchs); + } else if (type == ICMP_RD) { + MIB2_STATS_INC(mib2.icmpinredirects); + } else if (type == ICMP_TS) { + MIB2_STATS_INC(mib2.icmpintimestamps); + } else if (type == ICMP_TSR) { + MIB2_STATS_INC(mib2.icmpintimestampreps); + } else if (type == ICMP_AM) { + MIB2_STATS_INC(mib2.icmpinaddrmasks); + } else if (type == ICMP_AMR) { + MIB2_STATS_INC(mib2.icmpinaddrmaskreps); + } + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %"S16_F" code %"S16_F" not supported.\n", + (s16_t)type, (s16_t)code)); + ICMP_STATS_INC(icmp.proterr); + ICMP_STATS_INC(icmp.drop); + } + pbuf_free(p); + return; +lenerr: + pbuf_free(p); + ICMP_STATS_INC(icmp.lenerr); + MIB2_STATS_INC(mib2.icmpinerrors); + return; +#if LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN || !LWIP_MULTICAST_PING || !LWIP_BROADCAST_PING +icmperr: + pbuf_free(p); + ICMP_STATS_INC(icmp.err); + MIB2_STATS_INC(mib2.icmpinerrors); + return; +#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN || !LWIP_MULTICAST_PING || !LWIP_BROADCAST_PING */ +} + +/** + * Send an icmp 'destination unreachable' packet, called from ip_input() if + * the transport layer protocol is unknown and from udp_input() if the local + * port is not bound. + * + * @param p the input packet for which the 'unreachable' should be sent, + * p->payload pointing to the IP header + * @param t type of the 'unreachable' packet + */ +void +icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t) +{ + MIB2_STATS_INC(mib2.icmpoutdestunreachs); + icmp_send_response(p, ICMP_DUR, t); +} + +#if IP_FORWARD || IP_REASSEMBLY +/** + * Send a 'time exceeded' packet, called from ip_forward() if TTL is 0. + * + * @param p the input packet for which the 'time exceeded' should be sent, + * p->payload pointing to the IP header + * @param t type of the 'time exceeded' packet + */ +void +icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t) +{ + MIB2_STATS_INC(mib2.icmpouttimeexcds); + icmp_send_response(p, ICMP_TE, t); +} + +#endif /* IP_FORWARD || IP_REASSEMBLY */ + +/** + * Send an icmp packet in response to an incoming packet. + * + * @param p the input packet for which the 'unreachable' should be sent, + * p->payload pointing to the IP header + * @param type Type of the ICMP header + * @param code Code of the ICMP header + */ +static void +icmp_send_response(struct pbuf *p, u8_t type, u8_t code) +{ + struct pbuf *q; + struct ip_hdr *iphdr; + struct icmp_hdr *icmphdr; + ip4_addr_t iphdr_src; + struct netif *netif; + u16_t response_pkt_len; + + /* increase number of messages attempted to send */ + MIB2_STATS_INC(mib2.icmpoutmsgs); + + /* Keep IP header + up to 8 bytes */ + response_pkt_len = IP_HLEN + ICMP_DEST_UNREACH_DATASIZE; + if (p->tot_len < response_pkt_len) { + response_pkt_len = p->tot_len; + } + + /* ICMP header + part of original packet */ + q = pbuf_alloc(PBUF_IP, sizeof(struct icmp_hdr) + response_pkt_len, PBUF_RAM); + if (q == NULL) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_send_response: failed to allocate pbuf for ICMP packet.\n")); + MIB2_STATS_INC(mib2.icmpouterrors); + return; + } + LWIP_ASSERT("check that first pbuf can hold icmp message", + (q->len >= (sizeof(struct icmp_hdr) + response_pkt_len))); + + iphdr = (struct ip_hdr *)p->payload; + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_send_response: Sending ICMP type %02X for packet from ", type)); + ip4_addr_debug_print_val(ICMP_DEBUG, iphdr->src); + LWIP_DEBUGF(ICMP_DEBUG, (" to ")); + ip4_addr_debug_print_val(ICMP_DEBUG, iphdr->dest); + LWIP_DEBUGF(ICMP_DEBUG, ("\n")); + + icmphdr = (struct icmp_hdr *)q->payload; + icmphdr->type = type; + icmphdr->code = code; + icmphdr->data = 0; + + /* copy fields from original packet */ + pbuf_copy_partial_pbuf(q, p, response_pkt_len, sizeof(struct icmp_hdr)); + + ip4_addr_copy(iphdr_src, iphdr->src); +#ifdef LWIP_HOOK_IP4_ROUTE_SRC + { + ip4_addr_t iphdr_dst; + ip4_addr_copy(iphdr_dst, iphdr->dest); + netif = ip4_route_src(&iphdr_dst, &iphdr_src); + } +#else + netif = ip4_route(&iphdr_src); +#endif + if (netif != NULL) { + /* calculate checksum */ + icmphdr->chksum = 0; +#if CHECKSUM_GEN_ICMP + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP) { + icmphdr->chksum = inet_chksum(icmphdr, q->len); + } +#endif + ICMP_STATS_INC(icmp.xmit); + ip4_output_if(q, NULL, &iphdr_src, ICMP_TTL, 0, IP_PROTO_ICMP, netif); + } + pbuf_free(q); +} + +#endif /* LWIP_IPV4 && LWIP_ICMP */ diff --git a/lib/lwip/core/ipv4/igmp.c b/lib/lwip/core/ipv4/igmp.c new file mode 100644 index 0000000000..a74df16faf --- /dev/null +++ b/lib/lwip/core/ipv4/igmp.c @@ -0,0 +1,801 @@ +/** + * @file + * IGMP - Internet Group Management Protocol + * + * @defgroup igmp IGMP + * @ingroup ip4 + * To be called from TCPIP thread + */ + +/* + * Copyright (c) 2002 CITEL Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is a contribution to the lwIP TCP/IP stack. + * The Swedish Institute of Computer Science and Adam Dunkels + * are specifically granted permission to redistribute this + * source code. +*/ + +/*------------------------------------------------------------- +Note 1) +Although the rfc requires V1 AND V2 capability +we will only support v2 since now V1 is very old (August 1989) +V1 can be added if required + +a debug print and statistic have been implemented to +show this up. +------------------------------------------------------------- +------------------------------------------------------------- +Note 2) +A query for a specific group address (as opposed to ALLHOSTS) +has now been implemented as I am unsure if it is required + +a debug print and statistic have been implemented to +show this up. +------------------------------------------------------------- +------------------------------------------------------------- +Note 3) +The router alert rfc 2113 is implemented in outgoing packets +but not checked rigorously incoming +------------------------------------------------------------- +Steve Reynolds +------------------------------------------------------------*/ + +/*----------------------------------------------------------------------------- + * RFC 988 - Host extensions for IP multicasting - V0 + * RFC 1054 - Host extensions for IP multicasting - + * RFC 1112 - Host extensions for IP multicasting - V1 + * RFC 2236 - Internet Group Management Protocol, Version 2 - V2 <- this code is based on this RFC (it's the "de facto" standard) + * RFC 3376 - Internet Group Management Protocol, Version 3 - V3 + * RFC 4604 - Using Internet Group Management Protocol Version 3... - V3+ + * RFC 2113 - IP Router Alert Option - + *----------------------------------------------------------------------------*/ + +/*----------------------------------------------------------------------------- + * Includes + *----------------------------------------------------------------------------*/ + +#include "lwip/opt.h" + +#if LWIP_IPV4 && LWIP_IGMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/igmp.h" +#include "lwip/debug.h" +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/ip.h" +#include "lwip/inet_chksum.h" +#include "lwip/netif.h" +#include "lwip/stats.h" +#include "lwip/prot/igmp.h" + +#include <string.h> + +static struct igmp_group *igmp_lookup_group(struct netif *ifp, const ip4_addr_t *addr); +static err_t igmp_remove_group(struct netif *netif, struct igmp_group *group); +static void igmp_timeout(struct netif *netif, struct igmp_group *group); +static void igmp_start_timer(struct igmp_group *group, u8_t max_time); +static void igmp_delaying_member(struct igmp_group *group, u8_t maxresp); +static err_t igmp_ip_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, struct netif *netif); +static void igmp_send(struct netif *netif, struct igmp_group *group, u8_t type); + +static ip4_addr_t allsystems; +static ip4_addr_t allrouters; + +/** + * Initialize the IGMP module + */ +void +igmp_init(void) +{ + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_init: initializing\n")); + + IP4_ADDR(&allsystems, 224, 0, 0, 1); + IP4_ADDR(&allrouters, 224, 0, 0, 2); +} + +/** + * Start IGMP processing on interface + * + * @param netif network interface on which start IGMP processing + */ +err_t +igmp_start(struct netif *netif) +{ + struct igmp_group *group; + + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_start: starting IGMP processing on if %p\n", (void *)netif)); + + group = igmp_lookup_group(netif, &allsystems); + + if (group != NULL) { + group->group_state = IGMP_GROUP_IDLE_MEMBER; + group->use++; + + /* Allow the igmp messages at the MAC level */ + if (netif->igmp_mac_filter != NULL) { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_start: igmp_mac_filter(ADD ")); + ip4_addr_debug_print_val(IGMP_DEBUG, allsystems); + LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", (void *)netif)); + netif->igmp_mac_filter(netif, &allsystems, NETIF_ADD_MAC_FILTER); + } + + return ERR_OK; + } + + return ERR_MEM; +} + +/** + * Stop IGMP processing on interface + * + * @param netif network interface on which stop IGMP processing + */ +err_t +igmp_stop(struct netif *netif) +{ + struct igmp_group *group = netif_igmp_data(netif); + + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_IGMP, NULL); + + while (group != NULL) { + struct igmp_group *next = group->next; /* avoid use-after-free below */ + + /* disable the group at the MAC level */ + if (netif->igmp_mac_filter != NULL) { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_stop: igmp_mac_filter(DEL ")); + ip4_addr_debug_print_val(IGMP_DEBUG, group->group_address); + LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", (void *)netif)); + netif->igmp_mac_filter(netif, &(group->group_address), NETIF_DEL_MAC_FILTER); + } + + /* free group */ + memp_free(MEMP_IGMP_GROUP, group); + + /* move to "next" */ + group = next; + } + return ERR_OK; +} + +/** + * Report IGMP memberships for this interface + * + * @param netif network interface on which report IGMP memberships + */ +void +igmp_report_groups(struct netif *netif) +{ + struct igmp_group *group = netif_igmp_data(netif); + + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_report_groups: sending IGMP reports on if %p\n", (void *)netif)); + + /* Skip the first group in the list, it is always the allsystems group added in igmp_start() */ + if (group != NULL) { + group = group->next; + } + + while (group != NULL) { + igmp_delaying_member(group, IGMP_JOIN_DELAYING_MEMBER_TMR); + group = group->next; + } +} + +/** + * Search for a group in the netif's igmp group list + * + * @param ifp the network interface for which to look + * @param addr the group ip address to search for + * @return a struct igmp_group* if the group has been found, + * NULL if the group wasn't found. + */ +struct igmp_group * +igmp_lookfor_group(struct netif *ifp, const ip4_addr_t *addr) +{ + struct igmp_group *group = netif_igmp_data(ifp); + + while (group != NULL) { + if (ip4_addr_eq(&(group->group_address), addr)) { + return group; + } + group = group->next; + } + + /* to be clearer, we return NULL here instead of + * 'group' (which is also NULL at this point). + */ + return NULL; +} + +/** + * Search for a specific igmp group and create a new one if not found- + * + * @param ifp the network interface for which to look + * @param addr the group ip address to search + * @return a struct igmp_group*, + * NULL on memory error. + */ +static struct igmp_group * +igmp_lookup_group(struct netif *ifp, const ip4_addr_t *addr) +{ + struct igmp_group *group; + struct igmp_group *list_head = netif_igmp_data(ifp); + + /* Search if the group already exists */ + group = igmp_lookfor_group(ifp, addr); + if (group != NULL) { + /* Group already exists. */ + return group; + } + + /* Group doesn't exist yet, create a new one */ + group = (struct igmp_group *)memp_malloc(MEMP_IGMP_GROUP); + if (group != NULL) { + ip4_addr_set(&(group->group_address), addr); + group->timer = 0; /* Not running */ + group->group_state = IGMP_GROUP_NON_MEMBER; + group->last_reporter_flag = 0; + group->use = 0; + + /* Ensure allsystems group is always first in list */ + if (list_head == NULL) { + /* this is the first entry in linked list */ + LWIP_ASSERT("igmp_lookup_group: first group must be allsystems", + (ip4_addr_eq(addr, &allsystems) != 0)); + group->next = NULL; + netif_set_client_data(ifp, LWIP_NETIF_CLIENT_DATA_INDEX_IGMP, group); + } else { + /* append _after_ first entry */ + LWIP_ASSERT("igmp_lookup_group: all except first group must not be allsystems", + (ip4_addr_eq(addr, &allsystems) == 0)); + group->next = list_head->next; + list_head->next = group; + } + } + + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_lookup_group: %sallocated a new group with address ", (group ? "" : "impossible to "))); + ip4_addr_debug_print(IGMP_DEBUG, addr); + LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", (void *)ifp)); + + return group; +} + +/** + * Remove a group from netif's igmp group list, but don't free it yet + * + * @param group the group to remove from the netif's igmp group list + * @return ERR_OK if group was removed from the list, an err_t otherwise + */ +static err_t +igmp_remove_group(struct netif *netif, struct igmp_group *group) +{ + err_t err = ERR_OK; + struct igmp_group *tmp_group; + + /* Skip the first group in the list, it is always the allsystems group added in igmp_start() */ + for (tmp_group = netif_igmp_data(netif); tmp_group != NULL; tmp_group = tmp_group->next) { + if (tmp_group->next == group) { + tmp_group->next = group->next; + break; + } + } + /* Group not found in netif's igmp group list */ + if (tmp_group == NULL) { + err = ERR_ARG; + } + + return err; +} + +/** + * Called from ip_input() if a new IGMP packet is received. + * + * @param p received igmp packet, p->payload pointing to the igmp header + * @param inp network interface on which the packet was received + * @param dest destination ip address of the igmp packet + */ +void +igmp_input(struct pbuf *p, struct netif *inp, const ip4_addr_t *dest) +{ + struct igmp_msg *igmp; + struct igmp_group *group; + struct igmp_group *groupref; + + IGMP_STATS_INC(igmp.recv); + + /* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */ + if (p->len < IGMP_MINLEN) { + pbuf_free(p); + IGMP_STATS_INC(igmp.lenerr); + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: length error\n")); + return; + } + + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: message from ")); + ip4_addr_debug_print_val(IGMP_DEBUG, ip4_current_header()->src); + LWIP_DEBUGF(IGMP_DEBUG, (" to address ")); + ip4_addr_debug_print_val(IGMP_DEBUG, ip4_current_header()->dest); + LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", (void *)inp)); + + /* Now calculate and check the checksum */ + igmp = (struct igmp_msg *)p->payload; + if (inet_chksum(igmp, p->len)) { + pbuf_free(p); + IGMP_STATS_INC(igmp.chkerr); + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: checksum error\n")); + return; + } + + /* Packet is ok so find an existing group */ + group = igmp_lookfor_group(inp, dest); /* use the destination IP address of incoming packet */ + + /* If group can be found or create... */ + if (!group) { + pbuf_free(p); + IGMP_STATS_INC(igmp.drop); + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP frame not for us\n")); + return; + } + + /* NOW ACT ON THE INCOMING MESSAGE TYPE... */ + switch (igmp->igmp_msgtype) { + case IGMP_MEMB_QUERY: + /* IGMP_MEMB_QUERY to the "all systems" address ? */ + if ((ip4_addr_eq(dest, &allsystems)) && ip4_addr_isany(&igmp->igmp_group_address)) { + /* THIS IS THE GENERAL QUERY */ + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: General IGMP_MEMB_QUERY on "ALL SYSTEMS" address (224.0.0.1) [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp))); + + if (igmp->igmp_maxresp == 0) { + IGMP_STATS_INC(igmp.rx_v1); + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: got an all hosts query with time== 0 - this is V1 and not implemented - treat as v2\n")); + igmp->igmp_maxresp = IGMP_V1_DELAYING_MEMBER_TMR; + } else { + IGMP_STATS_INC(igmp.rx_general); + } + + groupref = netif_igmp_data(inp); + + /* Do not send messages on the all systems group address! */ + /* Skip the first group in the list, it is always the allsystems group added in igmp_start() */ + if (groupref != NULL) { + groupref = groupref->next; + } + + while (groupref) { + igmp_delaying_member(groupref, igmp->igmp_maxresp); + groupref = groupref->next; + } + } else { + /* IGMP_MEMB_QUERY to a specific group ? */ + if (!ip4_addr_isany(&igmp->igmp_group_address)) { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP_MEMB_QUERY to a specific group ")); + ip4_addr_debug_print_val(IGMP_DEBUG, igmp->igmp_group_address); + if (ip4_addr_eq(dest, &allsystems)) { + ip4_addr_t groupaddr; + LWIP_DEBUGF(IGMP_DEBUG, (" using "ALL SYSTEMS" address (224.0.0.1) [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp))); + /* we first need to re-look for the group since we used dest last time */ + ip4_addr_copy(groupaddr, igmp->igmp_group_address); + group = igmp_lookfor_group(inp, &groupaddr); + } else { + LWIP_DEBUGF(IGMP_DEBUG, (" with the group address as destination [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp))); + } + + if (group != NULL) { + IGMP_STATS_INC(igmp.rx_group); + igmp_delaying_member(group, igmp->igmp_maxresp); + } else { + IGMP_STATS_INC(igmp.drop); + } + } else { + IGMP_STATS_INC(igmp.proterr); + } + } + break; + case IGMP_V2_MEMB_REPORT: + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP_V2_MEMB_REPORT\n")); + IGMP_STATS_INC(igmp.rx_report); + if (group->group_state == IGMP_GROUP_DELAYING_MEMBER) { + /* This is on a specific group we have already looked up */ + group->timer = 0; /* stopped */ + group->group_state = IGMP_GROUP_IDLE_MEMBER; + group->last_reporter_flag = 0; + } + break; + default: + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: unexpected msg %d in state %d on group %p on if %p\n", + igmp->igmp_msgtype, group->group_state, (void *)&group, (void *)inp)); + IGMP_STATS_INC(igmp.proterr); + break; + } + + pbuf_free(p); + return; +} + +/** + * @ingroup igmp + * Join a group on one network interface. + * + * @param ifaddr ip address of the network interface which should join a new group + * @param groupaddr the ip address of the group which to join + * @return ERR_OK if group was joined on the netif(s), an err_t otherwise + */ +err_t +igmp_joingroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr) +{ + err_t err = ERR_VAL; /* no matching interface */ + struct netif *netif; + + LWIP_ASSERT_CORE_LOCKED(); + + /* make sure it is multicast address */ + LWIP_ERROR("igmp_joingroup: attempt to join non-multicast address", ip4_addr_ismulticast(groupaddr), return ERR_VAL;); + LWIP_ERROR("igmp_joingroup: attempt to join allsystems address", (!ip4_addr_eq(groupaddr, &allsystems)), return ERR_VAL;); + + /* loop through netif's */ + NETIF_FOREACH(netif) { + /* Should we join this interface ? */ + if ((netif->flags & NETIF_FLAG_IGMP) && ((ip4_addr_isany(ifaddr) || ip4_addr_eq(netif_ip4_addr(netif), ifaddr)))) { + err = igmp_joingroup_netif(netif, groupaddr); + if (err != ERR_OK) { + /* Return an error even if some network interfaces are joined */ + /** @todo undo any other netif already joined */ + return err; + } + } + } + + return err; +} + +/** + * @ingroup igmp + * Join a group on one network interface. + * + * @param netif the network interface which should join a new group + * @param groupaddr the ip address of the group which to join + * @return ERR_OK if group was joined on the netif, an err_t otherwise + */ +err_t +igmp_joingroup_netif(struct netif *netif, const ip4_addr_t *groupaddr) +{ + struct igmp_group *group; + + LWIP_ASSERT_CORE_LOCKED(); + + /* make sure it is multicast address */ + LWIP_ERROR("igmp_joingroup_netif: attempt to join non-multicast address", ip4_addr_ismulticast(groupaddr), return ERR_VAL;); + LWIP_ERROR("igmp_joingroup_netif: attempt to join allsystems address", (!ip4_addr_eq(groupaddr, &allsystems)), return ERR_VAL;); + + /* make sure it is an igmp-enabled netif */ + LWIP_ERROR("igmp_joingroup_netif: attempt to join on non-IGMP netif", netif->flags & NETIF_FLAG_IGMP, return ERR_VAL;); + + /* find group or create a new one if not found */ + group = igmp_lookup_group(netif, groupaddr); + + if (group != NULL) { + /* This should create a new group, check the state to make sure */ + if (group->group_state != IGMP_GROUP_NON_MEMBER) { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup_netif: join to group not in state IGMP_GROUP_NON_MEMBER\n")); + } else { + /* OK - it was new group */ + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup_netif: join to new group: ")); + ip4_addr_debug_print(IGMP_DEBUG, groupaddr); + LWIP_DEBUGF(IGMP_DEBUG, ("\n")); + + /* If first use of the group, allow the group at the MAC level */ + if ((group->use == 0) && (netif->igmp_mac_filter != NULL)) { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup_netif: igmp_mac_filter(ADD ")); + ip4_addr_debug_print(IGMP_DEBUG, groupaddr); + LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", (void *)netif)); + netif->igmp_mac_filter(netif, groupaddr, NETIF_ADD_MAC_FILTER); + } + + IGMP_STATS_INC(igmp.tx_join); + igmp_send(netif, group, IGMP_V2_MEMB_REPORT); + + igmp_start_timer(group, IGMP_JOIN_DELAYING_MEMBER_TMR); + + /* Need to work out where this timer comes from */ + group->group_state = IGMP_GROUP_DELAYING_MEMBER; + } + /* Increment group use */ + group->use++; + /* Join on this interface */ + return ERR_OK; + } else { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup_netif: Not enough memory to join to group\n")); + return ERR_MEM; + } +} + +/** + * @ingroup igmp + * Leave a group on one network interface. + * + * @param ifaddr ip address of the network interface which should leave a group + * @param groupaddr the ip address of the group which to leave + * @return ERR_OK if group was left on the netif(s), an err_t otherwise + */ +err_t +igmp_leavegroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr) +{ + err_t err = ERR_VAL; /* no matching interface */ + struct netif *netif; + + LWIP_ASSERT_CORE_LOCKED(); + + /* make sure it is multicast address */ + LWIP_ERROR("igmp_leavegroup: attempt to leave non-multicast address", ip4_addr_ismulticast(groupaddr), return ERR_VAL;); + LWIP_ERROR("igmp_leavegroup: attempt to leave allsystems address", (!ip4_addr_eq(groupaddr, &allsystems)), return ERR_VAL;); + + /* loop through netif's */ + NETIF_FOREACH(netif) { + /* Should we leave this interface ? */ + if ((netif->flags & NETIF_FLAG_IGMP) && ((ip4_addr_isany(ifaddr) || ip4_addr_eq(netif_ip4_addr(netif), ifaddr)))) { + err_t res = igmp_leavegroup_netif(netif, groupaddr); + if (err != ERR_OK) { + /* Store this result if we have not yet gotten a success */ + err = res; + } + } + } + + return err; +} + +/** + * @ingroup igmp + * Leave a group on one network interface. + * + * @param netif the network interface which should leave a group + * @param groupaddr the ip address of the group which to leave + * @return ERR_OK if group was left on the netif, an err_t otherwise + */ +err_t +igmp_leavegroup_netif(struct netif *netif, const ip4_addr_t *groupaddr) +{ + struct igmp_group *group; + + LWIP_ASSERT_CORE_LOCKED(); + + /* make sure it is multicast address */ + LWIP_ERROR("igmp_leavegroup_netif: attempt to leave non-multicast address", ip4_addr_ismulticast(groupaddr), return ERR_VAL;); + LWIP_ERROR("igmp_leavegroup_netif: attempt to leave allsystems address", (!ip4_addr_eq(groupaddr, &allsystems)), return ERR_VAL;); + + /* make sure it is an igmp-enabled netif */ + LWIP_ERROR("igmp_leavegroup_netif: attempt to leave on non-IGMP netif", netif->flags & NETIF_FLAG_IGMP, return ERR_VAL;); + + /* find group */ + group = igmp_lookfor_group(netif, groupaddr); + + if (group != NULL) { + /* Only send a leave if the flag is set according to the state diagram */ + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup_netif: Leaving group: ")); + ip4_addr_debug_print(IGMP_DEBUG, groupaddr); + LWIP_DEBUGF(IGMP_DEBUG, ("\n")); + + /* If there is no other use of the group */ + if (group->use <= 1) { + /* Remove the group from the list */ + igmp_remove_group(netif, group); + + /* If we are the last reporter for this group */ + if (group->last_reporter_flag) { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup_netif: sending leaving group\n")); + IGMP_STATS_INC(igmp.tx_leave); + igmp_send(netif, group, IGMP_LEAVE_GROUP); + } + + /* Disable the group at the MAC level */ + if (netif->igmp_mac_filter != NULL) { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup_netif: igmp_mac_filter(DEL ")); + ip4_addr_debug_print(IGMP_DEBUG, groupaddr); + LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", (void *)netif)); + netif->igmp_mac_filter(netif, groupaddr, NETIF_DEL_MAC_FILTER); + } + + /* Free group struct */ + memp_free(MEMP_IGMP_GROUP, group); + } else { + /* Decrement group use */ + group->use--; + } + return ERR_OK; + } else { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup_netif: not member of group\n")); + return ERR_VAL; + } +} + +/** + * The igmp timer function (both for NO_SYS=1 and =0) + * Should be called every IGMP_TMR_INTERVAL milliseconds (100 ms is default). + */ +void +igmp_tmr(void) +{ + struct netif *netif; + + NETIF_FOREACH(netif) { + struct igmp_group *group = netif_igmp_data(netif); + + while (group != NULL) { + if (group->timer > 0) { + group->timer--; + if (group->timer == 0) { + igmp_timeout(netif, group); + } + } + group = group->next; + } + } +} + +/** + * Called if a timeout for one group is reached. + * Sends a report for this group. + * + * @param group an igmp_group for which a timeout is reached + */ +static void +igmp_timeout(struct netif *netif, struct igmp_group *group) +{ + /* If the state is IGMP_GROUP_DELAYING_MEMBER then we send a report for this group + (unless it is the allsystems group) */ + if ((group->group_state == IGMP_GROUP_DELAYING_MEMBER) && + (!(ip4_addr_eq(&(group->group_address), &allsystems)))) { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_timeout: report membership for group with address ")); + ip4_addr_debug_print_val(IGMP_DEBUG, group->group_address); + LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", (void *)netif)); + + group->group_state = IGMP_GROUP_IDLE_MEMBER; + + IGMP_STATS_INC(igmp.tx_report); + igmp_send(netif, group, IGMP_V2_MEMB_REPORT); + } +} + +/** + * Start a timer for an igmp group + * + * @param group the igmp_group for which to start a timer + * @param max_time the time in multiples of IGMP_TMR_INTERVAL (decrease with + * every call to igmp_tmr()) + */ +static void +igmp_start_timer(struct igmp_group *group, u8_t max_time) +{ +#ifdef LWIP_RAND + group->timer = (u16_t)(max_time > 2 ? (LWIP_RAND() % max_time) : 1); +#else /* LWIP_RAND */ + /* ATTENTION: use this only if absolutely necessary! */ + group->timer = max_time / 2; +#endif /* LWIP_RAND */ + + if (group->timer == 0) { + group->timer = 1; + } +} + +/** + * Delaying membership report for a group if necessary + * + * @param group the igmp_group for which "delaying" membership report + * @param maxresp query delay + */ +static void +igmp_delaying_member(struct igmp_group *group, u8_t maxresp) +{ + if ((group->group_state == IGMP_GROUP_IDLE_MEMBER) || + ((group->group_state == IGMP_GROUP_DELAYING_MEMBER) && + ((group->timer == 0) || (maxresp < group->timer)))) { + igmp_start_timer(group, maxresp); + group->group_state = IGMP_GROUP_DELAYING_MEMBER; + } +} + + +/** + * Sends an IP packet on a network interface. This function constructs the IP header + * and calculates the IP header checksum. If the source IP address is NULL, + * the IP address of the outgoing network interface is filled in as source address. + * + * @param p the packet to send (p->payload points to the data, e.g. next + protocol header; if dest == LWIP_IP_HDRINCL, p already includes an + IP header and p->payload points to that IP header) + * @param src the source IP address to send from (if src == IP4_ADDR_ANY, the + * IP address of the netif used to send is used as source address) + * @param dest the destination IP address to send the packet to + * @param netif the netif on which to send this packet + * @return ERR_OK if the packet was sent OK + * ERR_BUF if p doesn't have enough space for IP/LINK headers + * returns errors returned by netif->output + */ +static err_t +igmp_ip_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, struct netif *netif) +{ + /* This is the "router alert" option */ + u16_t ra[2]; + ra[0] = PP_HTONS(ROUTER_ALERT); + ra[1] = 0x0000; /* Router shall examine packet */ + IGMP_STATS_INC(igmp.xmit); + return ip4_output_if_opt(p, src, dest, IGMP_TTL, 0, IP_PROTO_IGMP, netif, ra, ROUTER_ALERTLEN); +} + +/** + * Send an igmp packet to a specific group. + * + * @param group the group to which to send the packet + * @param type the type of igmp packet to send + */ +static void +igmp_send(struct netif *netif, struct igmp_group *group, u8_t type) +{ + struct pbuf *p = NULL; + struct igmp_msg *igmp = NULL; + ip4_addr_t src = *IP4_ADDR_ANY4; + ip4_addr_t *dest = NULL; + + /* IP header + "router alert" option + IGMP header */ + p = pbuf_alloc(PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM); + + if (p) { + igmp = (struct igmp_msg *)p->payload; + LWIP_ASSERT("igmp_send: check that first pbuf can hold struct igmp_msg", + (p->len >= sizeof(struct igmp_msg))); + ip4_addr_copy(src, *netif_ip4_addr(netif)); + + if (type == IGMP_V2_MEMB_REPORT) { + dest = &(group->group_address); + ip4_addr_copy(igmp->igmp_group_address, group->group_address); + group->last_reporter_flag = 1; /* Remember we were the last to report */ + } else { + if (type == IGMP_LEAVE_GROUP) { + dest = &allrouters; + ip4_addr_copy(igmp->igmp_group_address, group->group_address); + } + } + + if ((type == IGMP_V2_MEMB_REPORT) || (type == IGMP_LEAVE_GROUP)) { + igmp->igmp_msgtype = type; + igmp->igmp_maxresp = 0; + igmp->igmp_checksum = 0; + igmp->igmp_checksum = inet_chksum(igmp, IGMP_MINLEN); + + igmp_ip_output_if(p, &src, dest, netif); + } + + pbuf_free(p); + } else { + LWIP_DEBUGF(IGMP_DEBUG, ("igmp_send: not enough memory for igmp_send\n")); + IGMP_STATS_INC(igmp.memerr); + } +} + +#endif /* LWIP_IPV4 && LWIP_IGMP */ diff --git a/lib/lwip/core/ipv4/ip4.c b/lib/lwip/core/ipv4/ip4.c new file mode 100644 index 0000000000..e044bff2df --- /dev/null +++ b/lib/lwip/core/ipv4/ip4.c @@ -0,0 +1,1166 @@ +/** + * @file + * This is the IPv4 layer implementation for incoming and outgoing IP traffic. + * + * @see ip_frag.c + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_IPV4 + +#include "lwip/ip.h" +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/ip4_frag.h" +#include "lwip/inet_chksum.h" +#include "lwip/netif.h" +#include "lwip/icmp.h" +#include "lwip/igmp.h" +#include "lwip/priv/raw_priv.h" +#include "lwip/udp.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/autoip.h" +#include "lwip/stats.h" +#include "lwip/prot/iana.h" + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +/** Set this to 0 in the rare case of wanting to call an extra function to + * generate the IP checksum (in contrast to calculating it on-the-fly). */ +#ifndef LWIP_INLINE_IP_CHKSUM +#if LWIP_CHECKSUM_CTRL_PER_NETIF +#define LWIP_INLINE_IP_CHKSUM 0 +#else /* LWIP_CHECKSUM_CTRL_PER_NETIF */ +#define LWIP_INLINE_IP_CHKSUM 1 +#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */ +#endif + +#if LWIP_INLINE_IP_CHKSUM && CHECKSUM_GEN_IP +#define CHECKSUM_GEN_IP_INLINE 1 +#else +#define CHECKSUM_GEN_IP_INLINE 0 +#endif + +#if LWIP_DHCP || defined(LWIP_IP_ACCEPT_UDP_PORT) +#define IP_ACCEPT_LINK_LAYER_ADDRESSING 1 + +/** Some defines for DHCP to let link-layer-addressed packets through while the + * netif is down. + * To use this in your own application/protocol, define LWIP_IP_ACCEPT_UDP_PORT(port) + * to return 1 if the port is accepted and 0 if the port is not accepted. + */ +#if LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) +/* accept DHCP client port and custom port */ +#define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) (((port) == PP_NTOHS(LWIP_IANA_PORT_DHCP_CLIENT)) \ + || (LWIP_IP_ACCEPT_UDP_PORT(port))) +#elif defined(LWIP_IP_ACCEPT_UDP_PORT) /* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */ +/* accept custom port only */ +#define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) (LWIP_IP_ACCEPT_UDP_PORT(port)) +#else /* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */ +/* accept DHCP client port only */ +#define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) ((port) == PP_NTOHS(LWIP_IANA_PORT_DHCP_CLIENT)) +#endif /* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */ + +#else /* LWIP_DHCP */ +#define IP_ACCEPT_LINK_LAYER_ADDRESSING 0 +#endif /* LWIP_DHCP */ + +/** The IP header ID of the next outgoing IP packet */ +static u16_t ip_id; + +#if LWIP_MULTICAST_TX_OPTIONS +/** The default netif used for multicast */ +static struct netif *ip4_default_multicast_netif; + +/** + * @ingroup ip4 + * Set a default netif for IPv4 multicast. */ +void +ip4_set_default_multicast_netif(struct netif *default_multicast_netif) +{ + ip4_default_multicast_netif = default_multicast_netif; +} +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + +#ifdef LWIP_HOOK_IP4_ROUTE_SRC +/** + * Source based IPv4 routing must be fully implemented in + * LWIP_HOOK_IP4_ROUTE_SRC(). This function only provides the parameters. + */ +struct netif * +ip4_route_src(const ip4_addr_t *src, const ip4_addr_t *dest) +{ + if (src != NULL) { + /* when src==NULL, the hook is called from ip4_route(dest) */ + struct netif *netif = LWIP_HOOK_IP4_ROUTE_SRC(src, dest); + if (netif != NULL) { + return netif; + } + } + return ip4_route(dest); +} +#endif /* LWIP_HOOK_IP4_ROUTE_SRC */ + +/** + * Finds the appropriate network interface for a given IP address. It + * searches the list of network interfaces linearly. A match is found + * if the masked IP address of the network interface equals the masked + * IP address given to the function. + * + * @param dest the destination IP address for which to find the route + * @return the netif on which to send to reach dest + */ +struct netif * +ip4_route(const ip4_addr_t *dest) +{ +#if !LWIP_SINGLE_NETIF + struct netif *netif; + + LWIP_ASSERT_CORE_LOCKED(); + +#if LWIP_MULTICAST_TX_OPTIONS + /* Use administratively selected interface for multicast by default */ + if (ip4_addr_ismulticast(dest) && ip4_default_multicast_netif) { + return ip4_default_multicast_netif; + } +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + + /* bug #54569: in case LWIP_SINGLE_NETIF=1 and LWIP_DEBUGF() disabled, the following loop is optimized away */ + LWIP_UNUSED_ARG(dest); + + /* iterate through netifs */ + NETIF_FOREACH(netif) { + /* is the netif up, does it have a link and a valid address? */ + if (netif_is_up(netif) && netif_is_link_up(netif) && !ip4_addr_isany_val(*netif_ip4_addr(netif))) { + /* network mask matches? */ + if (ip4_addr_net_eq(dest, netif_ip4_addr(netif), netif_ip4_netmask(netif))) { + /* return netif on which to forward IP packet */ + return netif; + } + /* gateway matches on a non broadcast interface? (i.e. peer in a point to point interface) */ + if (((netif->flags & NETIF_FLAG_BROADCAST) == 0) && ip4_addr_eq(dest, netif_ip4_gw(netif))) { + /* return netif on which to forward IP packet */ + return netif; + } + } + } + +#if LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF + /* loopif is disabled, loopback traffic is passed through any netif */ + if (ip4_addr_isloopback(dest)) { + /* don't check for link on loopback traffic */ + if ((netif_default != NULL) && netif_is_up(netif_default)) { + return netif_default; + } + /* default netif is not up, just use any netif for loopback traffic */ + NETIF_FOREACH(netif) { + if (netif_is_up(netif)) { + return netif; + } + } + return NULL; + } +#endif /* LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF */ + +#ifdef LWIP_HOOK_IP4_ROUTE_SRC + netif = LWIP_HOOK_IP4_ROUTE_SRC(NULL, dest); + if (netif != NULL) { + return netif; + } +#elif defined(LWIP_HOOK_IP4_ROUTE) + netif = LWIP_HOOK_IP4_ROUTE(dest); + if (netif != NULL) { + return netif; + } +#endif +#endif /* !LWIP_SINGLE_NETIF */ + + if ((netif_default == NULL) || !netif_is_up(netif_default) || !netif_is_link_up(netif_default) || + ip4_addr_isany_val(*netif_ip4_addr(netif_default)) || ip4_addr_isloopback(dest)) { + /* No matching netif found and default netif is not usable. + If this is not good enough for you, use LWIP_HOOK_IP4_ROUTE() */ + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip4_route: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest))); + IP_STATS_INC(ip.rterr); + MIB2_STATS_INC(mib2.ipoutnoroutes); + return NULL; + } + + return netif_default; +} + +#if IP_FORWARD +/** + * Determine whether an IP address is in a reserved set of addresses + * that may not be forwarded, or whether datagrams to that destination + * may be forwarded. + * @param p the packet to forward + * @return 1: can forward 0: discard + */ +static int +ip4_canforward(struct pbuf *p) +{ + u32_t addr = lwip_htonl(ip4_addr_get_u32(ip4_current_dest_addr())); + +#ifdef LWIP_HOOK_IP4_CANFORWARD + int ret = LWIP_HOOK_IP4_CANFORWARD(p, addr); + if (ret >= 0) { + return ret; + } +#endif /* LWIP_HOOK_IP4_CANFORWARD */ + + if (p->flags & PBUF_FLAG_LLBCAST) { + /* don't route link-layer broadcasts */ + return 0; + } + if ((p->flags & PBUF_FLAG_LLMCAST) || IP_MULTICAST(addr)) { + /* don't route link-layer multicasts (use LWIP_HOOK_IP4_CANFORWARD instead) */ + return 0; + } + if (IP_EXPERIMENTAL(addr)) { + return 0; + } + if (IP_CLASSA(addr)) { + u32_t net = addr & IP_CLASSA_NET; + if ((net == 0) || (net == ((u32_t)IP_LOOPBACKNET << IP_CLASSA_NSHIFT))) { + /* don't route loopback packets */ + return 0; + } + } + return 1; +} + +/** + * Forwards an IP packet. It finds an appropriate route for the + * packet, decrements the TTL value of the packet, adjusts the + * checksum and outputs the packet on the appropriate interface. + * + * @param p the packet to forward (p->payload points to IP header) + * @param iphdr the IP header of the input packet + * @param inp the netif on which this packet was received + */ +static void +ip4_forward(struct pbuf *p, struct ip_hdr *iphdr, struct netif *inp) +{ + struct netif *netif; + + PERF_START; + LWIP_UNUSED_ARG(inp); + + if (!ip4_canforward(p)) { + goto return_noroute; + } + + /* RFC3927 2.7: do not forward link-local addresses */ + if (ip4_addr_islinklocal(ip4_current_dest_addr())) { + LWIP_DEBUGF(IP_DEBUG, ("ip4_forward: not forwarding LLA %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + ip4_addr1_16(ip4_current_dest_addr()), ip4_addr2_16(ip4_current_dest_addr()), + ip4_addr3_16(ip4_current_dest_addr()), ip4_addr4_16(ip4_current_dest_addr()))); + goto return_noroute; + } + + /* Find network interface where to forward this IP packet to. */ + netif = ip4_route_src(ip4_current_src_addr(), ip4_current_dest_addr()); + if (netif == NULL) { + LWIP_DEBUGF(IP_DEBUG, ("ip4_forward: no forwarding route for %"U16_F".%"U16_F".%"U16_F".%"U16_F" found\n", + ip4_addr1_16(ip4_current_dest_addr()), ip4_addr2_16(ip4_current_dest_addr()), + ip4_addr3_16(ip4_current_dest_addr()), ip4_addr4_16(ip4_current_dest_addr()))); + /* @todo: send ICMP_DUR_NET? */ + goto return_noroute; + } +#if !IP_FORWARD_ALLOW_TX_ON_RX_NETIF + /* Do not forward packets onto the same network interface on which + * they arrived. */ + if (netif == inp) { + LWIP_DEBUGF(IP_DEBUG, ("ip4_forward: not bouncing packets back on incoming interface.\n")); + goto return_noroute; + } +#endif /* IP_FORWARD_ALLOW_TX_ON_RX_NETIF */ + + /* decrement TTL */ + IPH_TTL_SET(iphdr, IPH_TTL(iphdr) - 1); + /* send ICMP if TTL == 0 */ + if (IPH_TTL(iphdr) == 0) { + MIB2_STATS_INC(mib2.ipinhdrerrors); +#if LWIP_ICMP + /* Don't send ICMP messages in response to ICMP messages */ + if (IPH_PROTO(iphdr) != IP_PROTO_ICMP) { + icmp_time_exceeded(p, ICMP_TE_TTL); + } +#endif /* LWIP_ICMP */ + return; + } + + /* Incrementally update the IP checksum. */ + if (IPH_CHKSUM(iphdr) >= PP_HTONS(0xffffU - 0x100)) { + IPH_CHKSUM_SET(iphdr, (u16_t)(IPH_CHKSUM(iphdr) + PP_HTONS(0x100) + 1)); + } else { + IPH_CHKSUM_SET(iphdr, (u16_t)(IPH_CHKSUM(iphdr) + PP_HTONS(0x100))); + } + + /* Take care of setting checksums to 0 for checksum offload netifs */ + if (CHECKSUM_GEN_IP || NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_IP)) { + IPH_CHKSUM_SET(iphdr, 0); + } + switch (IPH_PROTO(iphdr)) { +#if LWIP_UDP +#if LWIP_UDPLITE + case IP_PROTO_UDPLITE: +#endif + case IP_PROTO_UDP: + if (CHECKSUM_GEN_UDP || NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_UDP)) { + ((struct udp_hdr *)((u8_t *)iphdr + IPH_HL_BYTES(iphdr)))->chksum = 0; + } + break; +#endif +#if LWIP_TCP + case IP_PROTO_TCP: + if (CHECKSUM_GEN_TCP || NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_TCP)) { + ((struct tcp_hdr *)((u8_t *)iphdr + IPH_HL_BYTES(iphdr)))->chksum = 0; + } + break; +#endif +#if LWIP_ICMP + case IP_PROTO_ICMP: + if (CHECKSUM_GEN_ICMP || NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_ICMP)) { + ((struct icmp_hdr *)((u8_t *)iphdr + IPH_HL_BYTES(iphdr)))->chksum = 0; + } + break; +#endif + default: + /* there's really nothing to do here other than satisfying 'switch-default' */ + break; + } + + LWIP_DEBUGF(IP_DEBUG, ("ip4_forward: forwarding packet to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + ip4_addr1_16(ip4_current_dest_addr()), ip4_addr2_16(ip4_current_dest_addr()), + ip4_addr3_16(ip4_current_dest_addr()), ip4_addr4_16(ip4_current_dest_addr()))); + + IP_STATS_INC(ip.fw); + MIB2_STATS_INC(mib2.ipforwdatagrams); + IP_STATS_INC(ip.xmit); + + PERF_STOP("ip4_forward"); + /* don't fragment if interface has mtu set to 0 [loopif] */ + if (netif->mtu && (p->tot_len > netif->mtu)) { + if ((IPH_OFFSET(iphdr) & PP_NTOHS(IP_DF)) == 0) { +#if IP_FRAG + ip4_frag(p, netif, ip4_current_dest_addr()); +#else /* IP_FRAG */ + /* @todo: send ICMP Destination Unreachable code 13 "Communication administratively prohibited"? */ +#endif /* IP_FRAG */ + } else { +#if LWIP_ICMP + /* send ICMP Destination Unreachable code 4: "Fragmentation Needed and DF Set" */ + icmp_dest_unreach(p, ICMP_DUR_FRAG); +#endif /* LWIP_ICMP */ + } + return; + } + /* transmit pbuf on chosen interface */ + netif->output(netif, p, ip4_current_dest_addr()); + return; +return_noroute: + MIB2_STATS_INC(mib2.ipoutnoroutes); +} +#endif /* IP_FORWARD */ + +/** Return true if the current input packet should be accepted on this netif */ +static int +ip4_input_accept(struct netif *netif) +{ + LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest 0x%"X32_F" netif->ip_addr 0x%"X32_F" (0x%"X32_F", 0x%"X32_F", 0x%"X32_F")\n", + ip4_addr_get_u32(ip4_current_dest_addr()), ip4_addr_get_u32(netif_ip4_addr(netif)), + ip4_addr_get_u32(ip4_current_dest_addr()) & ip4_addr_get_u32(netif_ip4_netmask(netif)), + ip4_addr_get_u32(netif_ip4_addr(netif)) & ip4_addr_get_u32(netif_ip4_netmask(netif)), + ip4_addr_get_u32(ip4_current_dest_addr()) & ~ip4_addr_get_u32(netif_ip4_netmask(netif)))); + + /* interface is up and configured? */ + if ((netif_is_up(netif)) && (!ip4_addr_isany_val(*netif_ip4_addr(netif)))) { + /* unicast to this interface address? */ + if (ip4_addr_eq(ip4_current_dest_addr(), netif_ip4_addr(netif)) || + /* or broadcast on this interface network address? */ + ip4_addr_isbroadcast(ip4_current_dest_addr(), netif) +#if LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF + || (ip4_addr_get_u32(ip4_current_dest_addr()) == PP_HTONL(IPADDR_LOOPBACK)) +#endif /* LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF */ + ) { + LWIP_DEBUGF(IP_DEBUG, ("ip4_input: packet accepted on interface %c%c\n", + netif->name[0], netif->name[1])); + /* accept on this netif */ + return 1; + } +#if LWIP_AUTOIP + /* connections to link-local addresses must persist after changing + the netif's address (RFC3927 ch. 1.9) */ + if (autoip_accept_packet(netif, ip4_current_dest_addr())) { + LWIP_DEBUGF(IP_DEBUG, ("ip4_input: LLA packet accepted on interface %c%c\n", + netif->name[0], netif->name[1])); + /* accept on this netif */ + return 1; + } +#endif /* LWIP_AUTOIP */ + } + return 0; +} + +/** + * This function is called by the network interface device driver when + * an IP packet is received. The function does the basic checks of the + * IP header such as packet size being at least larger than the header + * size etc. If the packet was not destined for us, the packet is + * forwarded (using ip_forward). The IP checksum is always checked. + * + * Finally, the packet is sent to the upper layer protocol input function. + * + * @param p the received IP packet (p->payload points to IP header) + * @param inp the netif on which this packet was received + * @return ERR_OK if the packet was processed (could return ERR_* if it wasn't + * processed, but currently always returns ERR_OK) + */ +err_t +ip4_input(struct pbuf *p, struct netif *inp) +{ + const struct ip_hdr *iphdr; + struct netif *netif; + u16_t iphdr_hlen; + u16_t iphdr_len; +#if IP_ACCEPT_LINK_LAYER_ADDRESSING || LWIP_IGMP + int check_ip_src = 1; +#endif /* IP_ACCEPT_LINK_LAYER_ADDRESSING || LWIP_IGMP */ +#if LWIP_RAW + raw_input_state_t raw_status; +#endif /* LWIP_RAW */ + + LWIP_ASSERT_CORE_LOCKED(); + + IP_STATS_INC(ip.recv); + MIB2_STATS_INC(mib2.ipinreceives); + + /* identify the IP header */ + iphdr = (struct ip_hdr *)p->payload; + if (IPH_V(iphdr) != 4) { + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_WARNING, ("IP packet dropped due to bad version number %"U16_F"\n", (u16_t)IPH_V(iphdr))); + ip4_debug_print(p); + pbuf_free(p); + IP_STATS_INC(ip.err); + IP_STATS_INC(ip.drop); + MIB2_STATS_INC(mib2.ipinhdrerrors); + return ERR_OK; + } + +#ifdef LWIP_HOOK_IP4_INPUT + if (LWIP_HOOK_IP4_INPUT(p, inp)) { + /* the packet has been eaten */ + return ERR_OK; + } +#endif + + /* obtain IP header length in bytes */ + iphdr_hlen = IPH_HL_BYTES(iphdr); + /* obtain ip length in bytes */ + iphdr_len = lwip_ntohs(IPH_LEN(iphdr)); + + /* Trim pbuf. This is especially required for packets < 60 bytes. */ + if (iphdr_len < p->tot_len) { + pbuf_realloc(p, iphdr_len); + } + + /* header length exceeds first pbuf length, or ip length exceeds total pbuf length? */ + if ((iphdr_hlen > p->len) || (iphdr_len > p->tot_len) || (iphdr_hlen < IP_HLEN)) { + if (iphdr_hlen < IP_HLEN) { + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("ip4_input: short IP header (%"U16_F" bytes) received, IP packet dropped\n", iphdr_hlen)); + } + if (iphdr_hlen > p->len) { + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("IP header (len %"U16_F") does not fit in first pbuf (len %"U16_F"), IP packet dropped.\n", + iphdr_hlen, p->len)); + } + if (iphdr_len > p->tot_len) { + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("IP (len %"U16_F") is longer than pbuf (len %"U16_F"), IP packet dropped.\n", + iphdr_len, p->tot_len)); + } + /* free (drop) packet pbufs */ + pbuf_free(p); + IP_STATS_INC(ip.lenerr); + IP_STATS_INC(ip.drop); + MIB2_STATS_INC(mib2.ipindiscards); + return ERR_OK; + } + + /* verify checksum */ +#if CHECKSUM_CHECK_IP + IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_CHECK_IP) { + if (inet_chksum(iphdr, iphdr_hlen) != 0) { + + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("Checksum (0x%"X16_F") failed, IP packet dropped.\n", inet_chksum(iphdr, iphdr_hlen))); + ip4_debug_print(p); + pbuf_free(p); + IP_STATS_INC(ip.chkerr); + IP_STATS_INC(ip.drop); + MIB2_STATS_INC(mib2.ipinhdrerrors); + return ERR_OK; + } + } +#endif + + /* copy IP addresses to aligned ip_addr_t */ + ip_addr_copy_from_ip4(ip_data.current_iphdr_dest, iphdr->dest); + ip_addr_copy_from_ip4(ip_data.current_iphdr_src, iphdr->src); + + /* match packet against an interface, i.e. is this packet for us? */ + if (ip4_addr_ismulticast(ip4_current_dest_addr())) { +#if LWIP_IGMP + if ((inp->flags & NETIF_FLAG_IGMP) && (igmp_lookfor_group(inp, ip4_current_dest_addr()))) { + /* IGMP snooping switches need 0.0.0.0 to be allowed as source address (RFC 4541) */ + ip4_addr_t allsystems; + IP4_ADDR(&allsystems, 224, 0, 0, 1); + if (ip4_addr_eq(ip4_current_dest_addr(), &allsystems) && + ip4_addr_isany(ip4_current_src_addr())) { + check_ip_src = 0; + } + netif = inp; + } else { + netif = NULL; + } +#else /* LWIP_IGMP */ + if ((netif_is_up(inp)) && (!ip4_addr_isany_val(*netif_ip4_addr(inp)))) { + netif = inp; + } else { + netif = NULL; + } +#endif /* LWIP_IGMP */ + } else { + /* start trying with inp. if that's not acceptable, start walking the + list of configured netifs. */ + if (ip4_input_accept(inp)) { + netif = inp; + } else { + netif = NULL; +#if !LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF + /* Packets sent to the loopback address must not be accepted on an + * interface that does not have the loopback address assigned to it, + * unless a non-loopback interface is used for loopback traffic. */ + if (!ip4_addr_isloopback(ip4_current_dest_addr())) +#endif /* !LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF */ + { +#if !LWIP_SINGLE_NETIF + NETIF_FOREACH(netif) { + if (netif == inp) { + /* we checked that before already */ + continue; + } + if (ip4_input_accept(netif)) { + break; + } + } +#endif /* !LWIP_SINGLE_NETIF */ + } + } + } + +#if IP_ACCEPT_LINK_LAYER_ADDRESSING + /* Pass DHCP messages regardless of destination address. DHCP traffic is addressed + * using link layer addressing (such as Ethernet MAC) so we must not filter on IP. + * According to RFC 1542 section 3.1.1, referred by RFC 2131). + * + * If you want to accept private broadcast communication while a netif is down, + * define LWIP_IP_ACCEPT_UDP_PORT(dst_port), e.g.: + * + * #define LWIP_IP_ACCEPT_UDP_PORT(dst_port) ((dst_port) == PP_NTOHS(12345)) + */ + if (netif == NULL) { + /* remote port is DHCP server? */ + if (IPH_PROTO(iphdr) == IP_PROTO_UDP) { + const struct udp_hdr *udphdr = (const struct udp_hdr *)((const u8_t *)iphdr + iphdr_hlen); + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE, ("ip4_input: UDP packet to DHCP client port %"U16_F"\n", + lwip_ntohs(udphdr->dest))); + if (IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(udphdr->dest)) { + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE, ("ip4_input: DHCP packet accepted.\n")); + netif = inp; + check_ip_src = 0; + } + } + } +#endif /* IP_ACCEPT_LINK_LAYER_ADDRESSING */ + + /* broadcast or multicast packet source address? Compliant with RFC 1122: 3.2.1.3 */ +#if LWIP_IGMP || IP_ACCEPT_LINK_LAYER_ADDRESSING + if (check_ip_src +#if IP_ACCEPT_LINK_LAYER_ADDRESSING + /* DHCP servers need 0.0.0.0 to be allowed as source address (RFC 1.1.2.2: 3.2.1.3/a) */ + && !ip4_addr_isany_val(*ip4_current_src_addr()) +#endif /* IP_ACCEPT_LINK_LAYER_ADDRESSING */ + ) +#endif /* LWIP_IGMP || IP_ACCEPT_LINK_LAYER_ADDRESSING */ + { + if ((ip4_addr_isbroadcast(ip4_current_src_addr(), inp)) || + (ip4_addr_ismulticast(ip4_current_src_addr()))) { + /* packet source is not valid */ + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("ip4_input: packet source is not valid.\n")); + /* free (drop) packet pbufs */ + pbuf_free(p); + IP_STATS_INC(ip.drop); + MIB2_STATS_INC(mib2.ipinaddrerrors); + MIB2_STATS_INC(mib2.ipindiscards); + return ERR_OK; + } + } + + /* packet not for us? */ + if (netif == NULL) { + /* packet not for us, route or discard */ + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE, ("ip4_input: packet not for us.\n")); +#if IP_FORWARD + /* non-broadcast packet? */ + if (!ip4_addr_isbroadcast(ip4_current_dest_addr(), inp)) { + /* try to forward IP packet on (other) interfaces */ + ip4_forward(p, (struct ip_hdr *)p->payload, inp); + } else +#endif /* IP_FORWARD */ + { + IP_STATS_INC(ip.drop); + MIB2_STATS_INC(mib2.ipinaddrerrors); + MIB2_STATS_INC(mib2.ipindiscards); + } + pbuf_free(p); + return ERR_OK; + } + /* packet consists of multiple fragments? */ + if ((IPH_OFFSET(iphdr) & PP_HTONS(IP_OFFMASK | IP_MF)) != 0) { +#if IP_REASSEMBLY /* packet fragment reassembly code present? */ + LWIP_DEBUGF(IP_DEBUG, ("IP packet is a fragment (id=0x%04"X16_F" tot_len=%"U16_F" len=%"U16_F" MF=%"U16_F" offset=%"U16_F"), calling ip4_reass()\n", + lwip_ntohs(IPH_ID(iphdr)), p->tot_len, lwip_ntohs(IPH_LEN(iphdr)), (u16_t)!!(IPH_OFFSET(iphdr) & PP_HTONS(IP_MF)), (u16_t)((lwip_ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK) * 8))); + /* reassemble the packet*/ + p = ip4_reass(p); + /* packet not fully reassembled yet? */ + if (p == NULL) { + return ERR_OK; + } + iphdr = (const struct ip_hdr *)p->payload; +#else /* IP_REASSEMBLY == 0, no packet fragment reassembly code present */ + pbuf_free(p); + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("IP packet dropped since it was fragmented (0x%"X16_F") (while IP_REASSEMBLY == 0).\n", + lwip_ntohs(IPH_OFFSET(iphdr)))); + IP_STATS_INC(ip.opterr); + IP_STATS_INC(ip.drop); + /* unsupported protocol feature */ + MIB2_STATS_INC(mib2.ipinunknownprotos); + return ERR_OK; +#endif /* IP_REASSEMBLY */ + } + +#if IP_OPTIONS_ALLOWED == 0 /* no support for IP options in the IP header? */ + +#if LWIP_IGMP + /* there is an extra "router alert" option in IGMP messages which we allow for but do not police */ + if ((iphdr_hlen > IP_HLEN) && (IPH_PROTO(iphdr) != IP_PROTO_IGMP)) { +#else + if (iphdr_hlen > IP_HLEN) { +#endif /* LWIP_IGMP */ + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("IP packet dropped since there were IP options (while IP_OPTIONS_ALLOWED == 0).\n")); + pbuf_free(p); + IP_STATS_INC(ip.opterr); + IP_STATS_INC(ip.drop); + /* unsupported protocol feature */ + MIB2_STATS_INC(mib2.ipinunknownprotos); + return ERR_OK; + } +#endif /* IP_OPTIONS_ALLOWED == 0 */ + + /* send to upper layers */ + LWIP_DEBUGF(IP_DEBUG, ("ip4_input: \n")); + ip4_debug_print(p); + LWIP_DEBUGF(IP_DEBUG, ("ip4_input: p->len %"U16_F" p->tot_len %"U16_F"\n", p->len, p->tot_len)); + + ip_data.current_netif = netif; + ip_data.current_input_netif = inp; + ip_data.current_ip4_header = iphdr; + ip_data.current_ip_header_tot_len = IPH_HL_BYTES(iphdr); + +#if LWIP_RAW + /* raw input did not eat the packet? */ + raw_status = raw_input(p, inp); + if (raw_status != RAW_INPUT_EATEN) +#endif /* LWIP_RAW */ + { + pbuf_remove_header(p, iphdr_hlen); /* Move to payload, no check necessary. */ + + switch (IPH_PROTO(iphdr)) { +#if LWIP_UDP + case IP_PROTO_UDP: +#if LWIP_UDPLITE + case IP_PROTO_UDPLITE: +#endif /* LWIP_UDPLITE */ + MIB2_STATS_INC(mib2.ipindelivers); + udp_input(p, inp); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case IP_PROTO_TCP: + MIB2_STATS_INC(mib2.ipindelivers); + tcp_input(p, inp); + break; +#endif /* LWIP_TCP */ +#if LWIP_ICMP + case IP_PROTO_ICMP: + MIB2_STATS_INC(mib2.ipindelivers); + icmp_input(p, inp); + break; +#endif /* LWIP_ICMP */ +#if LWIP_IGMP + case IP_PROTO_IGMP: + igmp_input(p, inp, ip4_current_dest_addr()); + break; +#endif /* LWIP_IGMP */ + default: +#if LWIP_RAW + if (raw_status == RAW_INPUT_DELIVERED) { + MIB2_STATS_INC(mib2.ipindelivers); + } else +#endif /* LWIP_RAW */ + { +#if LWIP_ICMP + /* send ICMP destination protocol unreachable unless is was a broadcast */ + if (!ip4_addr_isbroadcast(ip4_current_dest_addr(), netif) && + !ip4_addr_ismulticast(ip4_current_dest_addr())) { + pbuf_header_force(p, (s16_t)iphdr_hlen); /* Move to ip header, no check necessary. */ + icmp_dest_unreach(p, ICMP_DUR_PROTO); + } +#endif /* LWIP_ICMP */ + + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("Unsupported transport protocol %"U16_F"\n", (u16_t)IPH_PROTO(iphdr))); + + IP_STATS_INC(ip.proterr); + IP_STATS_INC(ip.drop); + MIB2_STATS_INC(mib2.ipinunknownprotos); + } + pbuf_free(p); + break; + } + } + + /* @todo: this is not really necessary... */ + ip_data.current_netif = NULL; + ip_data.current_input_netif = NULL; + ip_data.current_ip4_header = NULL; + ip_data.current_ip_header_tot_len = 0; + ip4_addr_set_any(ip4_current_src_addr()); + ip4_addr_set_any(ip4_current_dest_addr()); + + return ERR_OK; +} + +/** + * Sends an IP packet on a network interface. This function constructs + * the IP header and calculates the IP header checksum. If the source + * IP address is NULL, the IP address of the outgoing network + * interface is filled in as source address. + * If the destination IP address is LWIP_IP_HDRINCL, p is assumed to already + * include an IP header and p->payload points to it instead of the data. + * + * @param p the packet to send (p->payload points to the data, e.g. next + protocol header; if dest == LWIP_IP_HDRINCL, p already includes an + IP header and p->payload points to that IP header) + * @param src the source IP address to send from (if src == IP4_ADDR_ANY, the + * IP address of the netif used to send is used as source address) + * @param dest the destination IP address to send the packet to + * @param ttl the TTL value to be set in the IP header + * @param tos the TOS value to be set in the IP header + * @param proto the PROTOCOL to be set in the IP header + * @param netif the netif on which to send this packet + * @return ERR_OK if the packet was sent OK + * ERR_BUF if p doesn't have enough space for IP/LINK headers + * returns errors returned by netif->output + * + * @note ip_id: RFC791 "some host may be able to simply use + * unique identifiers independent of destination" + */ +err_t +ip4_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, + u8_t proto, struct netif *netif) +{ +#if IP_OPTIONS_SEND + return ip4_output_if_opt(p, src, dest, ttl, tos, proto, netif, NULL, 0); +} + +/** + * Same as ip_output_if() but with the possibility to include IP options: + * + * @ param ip_options pointer to the IP options, copied into the IP header + * @ param optlen length of ip_options + */ +err_t +ip4_output_if_opt(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options, + u16_t optlen) +{ +#endif /* IP_OPTIONS_SEND */ + const ip4_addr_t *src_used = src; + if (dest != LWIP_IP_HDRINCL) { + if (ip4_addr_isany(src)) { + src_used = netif_ip4_addr(netif); + } + } + +#if IP_OPTIONS_SEND + return ip4_output_if_opt_src(p, src_used, dest, ttl, tos, proto, netif, + ip_options, optlen); +#else /* IP_OPTIONS_SEND */ + return ip4_output_if_src(p, src_used, dest, ttl, tos, proto, netif); +#endif /* IP_OPTIONS_SEND */ +} + +/** + * Same as ip_output_if() but 'src' address is not replaced by netif address + * when it is 'any'. + */ +err_t +ip4_output_if_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, + u8_t proto, struct netif *netif) +{ +#if IP_OPTIONS_SEND + return ip4_output_if_opt_src(p, src, dest, ttl, tos, proto, netif, NULL, 0); +} + +/** + * Same as ip_output_if_opt() but 'src' address is not replaced by netif address + * when it is 'any'. + */ +err_t +ip4_output_if_opt_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options, + u16_t optlen) +{ +#endif /* IP_OPTIONS_SEND */ + struct ip_hdr *iphdr; + ip4_addr_t dest_addr; +#if CHECKSUM_GEN_IP_INLINE + u32_t chk_sum = 0; +#endif /* CHECKSUM_GEN_IP_INLINE */ + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p); + + MIB2_STATS_INC(mib2.ipoutrequests); + + /* Should the IP header be generated or is it already included in p? */ + if (dest != LWIP_IP_HDRINCL) { + u16_t ip_hlen = IP_HLEN; +#if IP_OPTIONS_SEND + u16_t optlen_aligned = 0; + if (optlen != 0) { +#if CHECKSUM_GEN_IP_INLINE + int i; +#endif /* CHECKSUM_GEN_IP_INLINE */ + if (optlen > (IP_HLEN_MAX - IP_HLEN)) { + /* optlen too long */ + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip4_output_if_opt: optlen too long\n")); + IP_STATS_INC(ip.err); + MIB2_STATS_INC(mib2.ipoutdiscards); + return ERR_VAL; + } + /* round up to a multiple of 4 */ + optlen_aligned = (u16_t)((optlen + 3) & ~3); + ip_hlen = (u16_t)(ip_hlen + optlen_aligned); + /* First write in the IP options */ + if (pbuf_add_header(p, optlen_aligned)) { + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip4_output_if_opt: not enough room for IP options in pbuf\n")); + IP_STATS_INC(ip.err); + MIB2_STATS_INC(mib2.ipoutdiscards); + return ERR_BUF; + } + MEMCPY(p->payload, ip_options, optlen); + if (optlen < optlen_aligned) { + /* zero the remaining bytes */ + memset(((char *)p->payload) + optlen, 0, (size_t)(optlen_aligned - optlen)); + } +#if CHECKSUM_GEN_IP_INLINE + for (i = 0; i < optlen_aligned / 2; i++) { + chk_sum += ((u16_t *)p->payload)[i]; + } +#endif /* CHECKSUM_GEN_IP_INLINE */ + } +#endif /* IP_OPTIONS_SEND */ + /* generate IP header */ + if (pbuf_add_header(p, IP_HLEN)) { + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip4_output: not enough room for IP header in pbuf\n")); + + IP_STATS_INC(ip.err); + MIB2_STATS_INC(mib2.ipoutdiscards); + return ERR_BUF; + } + + iphdr = (struct ip_hdr *)p->payload; + LWIP_ASSERT("check that first pbuf can hold struct ip_hdr", + (p->len >= sizeof(struct ip_hdr))); + + IPH_TTL_SET(iphdr, ttl); + IPH_PROTO_SET(iphdr, proto); +#if CHECKSUM_GEN_IP_INLINE + chk_sum += PP_NTOHS(proto | (ttl << 8)); +#endif /* CHECKSUM_GEN_IP_INLINE */ + + /* dest cannot be NULL here */ + ip4_addr_copy(iphdr->dest, *dest); +#if CHECKSUM_GEN_IP_INLINE + chk_sum += ip4_addr_get_u32(&iphdr->dest) & 0xFFFF; + chk_sum += ip4_addr_get_u32(&iphdr->dest) >> 16; +#endif /* CHECKSUM_GEN_IP_INLINE */ + + IPH_VHL_SET(iphdr, 4, ip_hlen / 4); + IPH_TOS_SET(iphdr, tos); +#if CHECKSUM_GEN_IP_INLINE + chk_sum += PP_NTOHS(tos | (iphdr->_v_hl << 8)); +#endif /* CHECKSUM_GEN_IP_INLINE */ + IPH_LEN_SET(iphdr, lwip_htons(p->tot_len)); +#if CHECKSUM_GEN_IP_INLINE + chk_sum += iphdr->_len; +#endif /* CHECKSUM_GEN_IP_INLINE */ + IPH_OFFSET_SET(iphdr, 0); + IPH_ID_SET(iphdr, lwip_htons(ip_id)); +#if CHECKSUM_GEN_IP_INLINE + chk_sum += iphdr->_id; +#endif /* CHECKSUM_GEN_IP_INLINE */ + ++ip_id; + + if (src == NULL) { + ip4_addr_copy(iphdr->src, *IP4_ADDR_ANY4); + } else { + /* src cannot be NULL here */ + ip4_addr_copy(iphdr->src, *src); + } + +#if CHECKSUM_GEN_IP_INLINE + chk_sum += ip4_addr_get_u32(&iphdr->src) & 0xFFFF; + chk_sum += ip4_addr_get_u32(&iphdr->src) >> 16; + chk_sum = (chk_sum >> 16) + (chk_sum & 0xFFFF); + chk_sum = (chk_sum >> 16) + chk_sum; + chk_sum = ~chk_sum; + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_IP) { + iphdr->_chksum = (u16_t)chk_sum; /* network order */ + } +#if LWIP_CHECKSUM_CTRL_PER_NETIF + else { + IPH_CHKSUM_SET(iphdr, 0); + } +#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF*/ +#else /* CHECKSUM_GEN_IP_INLINE */ + IPH_CHKSUM_SET(iphdr, 0); +#if CHECKSUM_GEN_IP + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_IP) { + IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, ip_hlen)); + } +#endif /* CHECKSUM_GEN_IP */ +#endif /* CHECKSUM_GEN_IP_INLINE */ + } else { + /* IP header already included in p */ + if (p->len < IP_HLEN) { + LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip4_output: LWIP_IP_HDRINCL but pbuf is too short\n")); + IP_STATS_INC(ip.err); + MIB2_STATS_INC(mib2.ipoutdiscards); + return ERR_BUF; + } + iphdr = (struct ip_hdr *)p->payload; + ip4_addr_copy(dest_addr, iphdr->dest); + dest = &dest_addr; + } + + IP_STATS_INC(ip.xmit); + + LWIP_DEBUGF(IP_DEBUG, ("ip4_output_if: %c%c%"U16_F"\n", netif->name[0], netif->name[1], (u16_t)netif->num)); + ip4_debug_print(p); + +#if ENABLE_LOOPBACK + if (ip4_addr_eq(dest, netif_ip4_addr(netif)) +#if !LWIP_HAVE_LOOPIF + || ip4_addr_isloopback(dest) +#endif /* !LWIP_HAVE_LOOPIF */ + ) { + /* Packet to self, enqueue it for loopback */ + LWIP_DEBUGF(IP_DEBUG, ("netif_loop_output()\n")); + return netif_loop_output(netif, p); + } +#if LWIP_MULTICAST_TX_OPTIONS + if ((p->flags & PBUF_FLAG_MCASTLOOP) != 0) { + netif_loop_output(netif, p); + } +#endif /* LWIP_MULTICAST_TX_OPTIONS */ +#endif /* ENABLE_LOOPBACK */ +#if IP_FRAG + /* don't fragment if interface has mtu set to 0 [loopif] */ + if (netif->mtu && (p->tot_len > netif->mtu)) { + return ip4_frag(p, netif, dest); + } +#endif /* IP_FRAG */ + + LWIP_DEBUGF(IP_DEBUG, ("ip4_output_if: call netif->output()\n")); + return netif->output(netif, p, dest); +} + +/** + * Simple interface to ip_output_if. It finds the outgoing network + * interface and calls upon ip_output_if to do the actual work. + * + * @param p the packet to send (p->payload points to the data, e.g. next + protocol header; if dest == LWIP_IP_HDRINCL, p already includes an + IP header and p->payload points to that IP header) + * @param src the source IP address to send from (if src == IP4_ADDR_ANY, the + * IP address of the netif used to send is used as source address) + * @param dest the destination IP address to send the packet to + * @param ttl the TTL value to be set in the IP header + * @param tos the TOS value to be set in the IP header + * @param proto the PROTOCOL to be set in the IP header + * + * @return ERR_RTE if no route is found + * see ip_output_if() for more return values + */ +err_t +ip4_output(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto) +{ + struct netif *netif; + + LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p); + + if ((netif = ip4_route_src(src, dest)) == NULL) { + LWIP_DEBUGF(IP_DEBUG, ("ip4_output: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest))); + IP_STATS_INC(ip.rterr); + return ERR_RTE; + } + + return ip4_output_if(p, src, dest, ttl, tos, proto, netif); +} + +#if LWIP_NETIF_USE_HINTS +/** Like ip_output, but takes and addr_hint pointer that is passed on to netif->addr_hint + * before calling ip_output_if. + * + * @param p the packet to send (p->payload points to the data, e.g. next + protocol header; if dest == LWIP_IP_HDRINCL, p already includes an + IP header and p->payload points to that IP header) + * @param src the source IP address to send from (if src == IP4_ADDR_ANY, the + * IP address of the netif used to send is used as source address) + * @param dest the destination IP address to send the packet to + * @param ttl the TTL value to be set in the IP header + * @param tos the TOS value to be set in the IP header + * @param proto the PROTOCOL to be set in the IP header + * @param netif_hint netif output hint pointer set to netif->hint before + * calling ip_output_if() + * + * @return ERR_RTE if no route is found + * see ip_output_if() for more return values + */ +err_t +ip4_output_hinted(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto, struct netif_hint *netif_hint) +{ + struct netif *netif; + err_t err; + + LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p); + + if ((netif = ip4_route_src(src, dest)) == NULL) { + LWIP_DEBUGF(IP_DEBUG, ("ip4_output: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest))); + IP_STATS_INC(ip.rterr); + return ERR_RTE; + } + + NETIF_SET_HINTS(netif, netif_hint); + err = ip4_output_if(p, src, dest, ttl, tos, proto, netif); + NETIF_RESET_HINTS(netif); + + return err; +} +#endif /* LWIP_NETIF_USE_HINTS*/ + +#if IP_DEBUG +/* Print an IP header by using LWIP_DEBUGF + * @param p an IP packet, p->payload pointing to the IP header + */ +void +ip4_debug_print(struct pbuf *p) +{ + struct ip_hdr *iphdr = (struct ip_hdr *)p->payload; + + LWIP_DEBUGF(IP_DEBUG, ("IP header:\n")); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("|%2"S16_F" |%2"S16_F" | 0x%02"X16_F" | %5"U16_F" | (v, hl, tos, len)\n", + (u16_t)IPH_V(iphdr), + (u16_t)IPH_HL(iphdr), + (u16_t)IPH_TOS(iphdr), + lwip_ntohs(IPH_LEN(iphdr)))); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("| %5"U16_F" |%"U16_F"%"U16_F"%"U16_F"| %4"U16_F" | (id, flags, offset)\n", + lwip_ntohs(IPH_ID(iphdr)), + (u16_t)(lwip_ntohs(IPH_OFFSET(iphdr)) >> 15 & 1), + (u16_t)(lwip_ntohs(IPH_OFFSET(iphdr)) >> 14 & 1), + (u16_t)(lwip_ntohs(IPH_OFFSET(iphdr)) >> 13 & 1), + (u16_t)(lwip_ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK))); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | 0x%04"X16_F" | (ttl, proto, chksum)\n", + (u16_t)IPH_TTL(iphdr), + (u16_t)IPH_PROTO(iphdr), + lwip_ntohs(IPH_CHKSUM(iphdr)))); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | %3"U16_F" | %3"U16_F" | (src)\n", + ip4_addr1_16_val(iphdr->src), + ip4_addr2_16_val(iphdr->src), + ip4_addr3_16_val(iphdr->src), + ip4_addr4_16_val(iphdr->src))); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | %3"U16_F" | %3"U16_F" | (dest)\n", + ip4_addr1_16_val(iphdr->dest), + ip4_addr2_16_val(iphdr->dest), + ip4_addr3_16_val(iphdr->dest), + ip4_addr4_16_val(iphdr->dest))); + LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); +} +#endif /* IP_DEBUG */ + +#endif /* LWIP_IPV4 */ diff --git a/lib/lwip/core/ipv4/ip4_addr.c b/lib/lwip/core/ipv4/ip4_addr.c new file mode 100644 index 0000000000..79127ac953 --- /dev/null +++ b/lib/lwip/core/ipv4/ip4_addr.c @@ -0,0 +1,323 @@ +/** + * @file + * This is the IPv4 address tools implementation. + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_IPV4 + +#include "lwip/ip_addr.h" +#include "lwip/netif.h" + +/* used by IP4_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */ +const ip_addr_t ip_addr_any = IPADDR4_INIT(IPADDR_ANY); +const ip_addr_t ip_addr_broadcast = IPADDR4_INIT(IPADDR_BROADCAST); + +/** + * Determine if an address is a broadcast address on a network interface + * + * @param addr address to be checked + * @param netif the network interface against which the address is checked + * @return returns non-zero if the address is a broadcast address + */ +u8_t +ip4_addr_isbroadcast_u32(u32_t addr, const struct netif *netif) +{ + ip4_addr_t ipaddr; + ip4_addr_set_u32(&ipaddr, addr); + + /* all ones (broadcast) or all zeroes (old skool broadcast) */ + if ((~addr == IPADDR_ANY) || + (addr == IPADDR_ANY)) { + return 1; + /* no broadcast support on this network interface? */ + } else if ((netif->flags & NETIF_FLAG_BROADCAST) == 0) { + /* the given address cannot be a broadcast address + * nor can we check against any broadcast addresses */ + return 0; + /* address matches network interface address exactly? => no broadcast */ + } else if (addr == ip4_addr_get_u32(netif_ip4_addr(netif))) { + return 0; + /* on the same (sub) network... */ + } else if (ip4_addr_net_eq(&ipaddr, netif_ip4_addr(netif), netif_ip4_netmask(netif)) + /* ...and host identifier bits are all ones? =>... */ + && ((addr & ~ip4_addr_get_u32(netif_ip4_netmask(netif))) == + (IPADDR_BROADCAST & ~ip4_addr_get_u32(netif_ip4_netmask(netif))))) { + /* => network broadcast address */ + return 1; + } else { + return 0; + } +} + +/** Checks if a netmask is valid (starting with ones, then only zeros) + * + * @param netmask the IPv4 netmask to check (in network byte order!) + * @return 1 if the netmask is valid, 0 if it is not + */ +u8_t +ip4_addr_netmask_valid(u32_t netmask) +{ + u32_t mask; + u32_t nm_hostorder = lwip_htonl(netmask); + + /* first, check for the first zero */ + for (mask = 1UL << 31 ; mask != 0; mask >>= 1) { + if ((nm_hostorder & mask) == 0) { + break; + } + } + /* then check that there is no one */ + for (; mask != 0; mask >>= 1) { + if ((nm_hostorder & mask) != 0) { + /* there is a one after the first zero -> invalid */ + return 0; + } + } + /* no one after the first zero -> valid */ + return 1; +} + +/** + * Ascii internet address interpretation routine. + * The value returned is in network order. + * + * @param cp IP address in ascii representation (e.g. "127.0.0.1") + * @return ip address in network order + */ +u32_t +ipaddr_addr(const char *cp) +{ + ip4_addr_t val; + + if (ip4addr_aton(cp, &val)) { + return ip4_addr_get_u32(&val); + } + return (IPADDR_NONE); +} + +/** + * Check whether "cp" is a valid ascii representation + * of an Internet address and convert to a binary address. + * Returns 1 if the address is valid, 0 if not. + * This replaces inet_addr, the return value from which + * cannot distinguish between failure and a local broadcast address. + * + * @param cp IP address in ascii representation (e.g. "127.0.0.1") + * @param addr pointer to which to save the ip address in network order + * @return 1 if cp could be converted to addr, 0 on failure + */ +int +ip4addr_aton(const char *cp, ip4_addr_t *addr) +{ + u32_t val; + u8_t base; + char c; + u32_t parts[4]; + u32_t *pp = parts; + + c = *cp; + for (;;) { + /* + * Collect number up to ``.''. + * Values are specified as for C: + * 0x=hex, 0=octal, 1-9=decimal. + */ + if (!lwip_isdigit(c)) { + return 0; + } + val = 0; + base = 10; + if (c == '0') { + c = *++cp; + if (c == 'x' || c == 'X') { + base = 16; + c = *++cp; + } else { + base = 8; + } + } + for (;;) { + if (lwip_isdigit(c)) { + if((base == 8) && ((u32_t)(c - '0') >= 8)) + break; + val = (val * base) + (u32_t)(c - '0'); + c = *++cp; + } else if (base == 16 && lwip_isxdigit(c)) { + val = (val << 4) | (u32_t)(c + 10 - (lwip_islower(c) ? 'a' : 'A')); + c = *++cp; + } else { + break; + } + } + if (c == '.') { + /* + * Internet format: + * a.b.c.d + * a.b.c (with c treated as 16 bits) + * a.b (with b treated as 24 bits) + */ + if (pp >= parts + 3) { + return 0; + } + *pp++ = val; + c = *++cp; + } else { + break; + } + } + /* + * Check for trailing characters. + */ + if (c != '\0' && !lwip_isspace(c)) { + return 0; + } + /* + * Concoct the address according to + * the number of parts specified. + */ + switch (pp - parts + 1) { + + case 0: + return 0; /* initial nondigit */ + + case 1: /* a -- 32 bits */ + break; + + case 2: /* a.b -- 8.24 bits */ + if (val > 0xffffffUL) { + return 0; + } + if (parts[0] > 0xff) { + return 0; + } + val |= parts[0] << 24; + break; + + case 3: /* a.b.c -- 8.8.16 bits */ + if (val > 0xffff) { + return 0; + } + if ((parts[0] > 0xff) || (parts[1] > 0xff)) { + return 0; + } + val |= (parts[0] << 24) | (parts[1] << 16); + break; + + case 4: /* a.b.c.d -- 8.8.8.8 bits */ + if (val > 0xff) { + return 0; + } + if ((parts[0] > 0xff) || (parts[1] > 0xff) || (parts[2] > 0xff)) { + return 0; + } + val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); + break; + default: + LWIP_ASSERT("unhandled", 0); + break; + } + if (addr) { + ip4_addr_set_u32(addr, lwip_htonl(val)); + } + return 1; +} + +/** + * Convert numeric IP address into decimal dotted ASCII representation. + * returns ptr to static buffer; not reentrant! + * + * @param addr ip address in network order to convert + * @return pointer to a global static (!) buffer that holds the ASCII + * representation of addr + */ +char * +ip4addr_ntoa(const ip4_addr_t *addr) +{ + static char str[IP4ADDR_STRLEN_MAX]; + return ip4addr_ntoa_r(addr, str, IP4ADDR_STRLEN_MAX); +} + +/** + * Same as ip4addr_ntoa, but reentrant since a user-supplied buffer is used. + * + * @param addr ip address in network order to convert + * @param buf target buffer where the string is stored + * @param buflen length of buf + * @return either pointer to buf which now holds the ASCII + * representation of addr or NULL if buf was too small + */ +char * +ip4addr_ntoa_r(const ip4_addr_t *addr, char *buf, int buflen) +{ + u32_t s_addr; + char inv[3]; + char *rp; + u8_t *ap; + u8_t rem; + u8_t n; + u8_t i; + int len = 0; + + s_addr = ip4_addr_get_u32(addr); + + rp = buf; + ap = (u8_t *)&s_addr; + for (n = 0; n < 4; n++) { + i = 0; + do { + rem = *ap % (u8_t)10; + *ap /= (u8_t)10; + inv[i++] = (char)('0' + rem); + } while (*ap); + while (i--) { + if (len++ >= buflen) { + return NULL; + } + *rp++ = inv[i]; + } + if (len++ >= buflen) { + return NULL; + } + *rp++ = '.'; + ap++; + } + *--rp = 0; + return buf; +} + +#endif /* LWIP_IPV4 */ diff --git a/lib/lwip/core/ipv4/ip4_frag.c b/lib/lwip/core/ipv4/ip4_frag.c new file mode 100644 index 0000000000..530314471f --- /dev/null +++ b/lib/lwip/core/ipv4/ip4_frag.c @@ -0,0 +1,894 @@ +/** + * @file + * This is the IPv4 packet segmentation and reassembly implementation. + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Jani Monoses jani@iv.ro + * Simon Goldschmidt + * original reassembly code by Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_IPV4 + +#include "lwip/ip4_frag.h" +#include "lwip/def.h" +#include "lwip/inet_chksum.h" +#include "lwip/netif.h" +#include "lwip/stats.h" +#include "lwip/icmp.h" + +#include <string.h> + +#if IP_REASSEMBLY +/** + * The IP reassembly code currently has the following limitations: + * - IP header options are not supported + * - fragments must not overlap (e.g. due to different routes), + * currently, overlapping or duplicate fragments are thrown away + * if IP_REASS_CHECK_OVERLAP=1 (the default)! + * + * @todo: work with IP header options + */ + +/** Setting this to 0, you can turn off checking the fragments for overlapping + * regions. The code gets a little smaller. Only use this if you know that + * overlapping won't occur on your network! */ +#ifndef IP_REASS_CHECK_OVERLAP +#define IP_REASS_CHECK_OVERLAP 1 +#endif /* IP_REASS_CHECK_OVERLAP */ + +/** Set to 0 to prevent freeing the oldest datagram when the reassembly buffer is + * full (IP_REASS_MAX_PBUFS pbufs are enqueued). The code gets a little smaller. + * Datagrams will be freed by timeout only. Especially useful when MEMP_NUM_REASSDATA + * is set to 1, so one datagram can be reassembled at a time, only. */ +#ifndef IP_REASS_FREE_OLDEST +#define IP_REASS_FREE_OLDEST 1 +#endif /* IP_REASS_FREE_OLDEST */ + +#define IP_REASS_FLAG_LASTFRAG 0x01 + +#define IP_REASS_VALIDATE_TELEGRAM_FINISHED 1 +#define IP_REASS_VALIDATE_PBUF_QUEUED 0 +#define IP_REASS_VALIDATE_PBUF_DROPPED -1 + +/** This is a helper struct which holds the starting + * offset and the ending offset of this fragment to + * easily chain the fragments. + * It has the same packing requirements as the IP header, since it replaces + * the IP header in memory in incoming fragments (after copying it) to keep + * track of the various fragments. (-> If the IP header doesn't need packing, + * this struct doesn't need packing, too.) + */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip_reass_helper { + PACK_STRUCT_FIELD(struct pbuf *next_pbuf); + PACK_STRUCT_FIELD(u16_t start); + PACK_STRUCT_FIELD(u16_t end); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define IP_ADDRESSES_AND_ID_MATCH(iphdrA, iphdrB) \ + (ip4_addr_eq(&(iphdrA)->src, &(iphdrB)->src) && \ + ip4_addr_eq(&(iphdrA)->dest, &(iphdrB)->dest) && \ + IPH_ID(iphdrA) == IPH_ID(iphdrB)) ? 1 : 0 + +/* global variables */ +static struct ip_reassdata *reassdatagrams; +static u16_t ip_reass_pbufcount; + +/* function prototypes */ +static void ip_reass_dequeue_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev); +static int ip_reass_free_complete_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev); + +/** + * Reassembly timer base function + * for both NO_SYS == 0 and 1 (!). + * + * Should be called every 1000 msec (defined by IP_TMR_INTERVAL). + */ +void +ip_reass_tmr(void) +{ + struct ip_reassdata *r, *prev = NULL; + + r = reassdatagrams; + while (r != NULL) { + /* Decrement the timer. Once it reaches 0, + * clean up the incomplete fragment assembly */ + if (r->timer > 0) { + r->timer--; + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer dec %"U16_F"\n", (u16_t)r->timer)); + prev = r; + r = r->next; + } else { + /* reassembly timed out */ + struct ip_reassdata *tmp; + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer timed out\n")); + tmp = r; + /* get the next pointer before freeing */ + r = r->next; + /* free the helper struct and all enqueued pbufs */ + ip_reass_free_complete_datagram(tmp, prev); + } + } +} + +/** + * Free a datagram (struct ip_reassdata) and all its pbufs. + * Updates the total count of enqueued pbufs (ip_reass_pbufcount), + * SNMP counters and sends an ICMP time exceeded packet. + * + * @param ipr datagram to free + * @param prev the previous datagram in the linked list + * @return the number of pbufs freed + */ +static int +ip_reass_free_complete_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev) +{ + u16_t pbufs_freed = 0; + u16_t clen; + struct pbuf *p; + struct ip_reass_helper *iprh; + + LWIP_ASSERT("prev != ipr", prev != ipr); + if (prev != NULL) { + LWIP_ASSERT("prev->next == ipr", prev->next == ipr); + } + + MIB2_STATS_INC(mib2.ipreasmfails); +#if LWIP_ICMP + iprh = (struct ip_reass_helper *)ipr->p->payload; + if (iprh->start == 0) { + /* The first fragment was received, send ICMP time exceeded. */ + /* First, de-queue the first pbuf from r->p. */ + p = ipr->p; + ipr->p = iprh->next_pbuf; + /* Then, copy the original header into it. */ + SMEMCPY(p->payload, &ipr->iphdr, IP_HLEN); + icmp_time_exceeded(p, ICMP_TE_FRAG); + clen = pbuf_clen(p); + LWIP_ASSERT("pbufs_freed + clen <= 0xffff", pbufs_freed + clen <= 0xffff); + pbufs_freed = (u16_t)(pbufs_freed + clen); + pbuf_free(p); + } +#endif /* LWIP_ICMP */ + + /* First, free all received pbufs. The individual pbufs need to be released + separately as they have not yet been chained */ + p = ipr->p; + while (p != NULL) { + struct pbuf *pcur; + iprh = (struct ip_reass_helper *)p->payload; + pcur = p; + /* get the next pointer before freeing */ + p = iprh->next_pbuf; + clen = pbuf_clen(pcur); + LWIP_ASSERT("pbufs_freed + clen <= 0xffff", pbufs_freed + clen <= 0xffff); + pbufs_freed = (u16_t)(pbufs_freed + clen); + pbuf_free(pcur); + } + /* Then, unchain the struct ip_reassdata from the list and free it. */ + ip_reass_dequeue_datagram(ipr, prev); + LWIP_ASSERT("ip_reass_pbufcount >= pbufs_freed", ip_reass_pbufcount >= pbufs_freed); + ip_reass_pbufcount = (u16_t)(ip_reass_pbufcount - pbufs_freed); + + return pbufs_freed; +} + +#if IP_REASS_FREE_OLDEST +/** + * Free the oldest datagram to make room for enqueueing new fragments. + * The datagram 'fraghdr' belongs to is not freed! + * + * @param fraghdr IP header of the current fragment + * @param pbufs_needed number of pbufs needed to enqueue + * (used for freeing other datagrams if not enough space) + * @return the number of pbufs freed + */ +static int +ip_reass_remove_oldest_datagram(struct ip_hdr *fraghdr, int pbufs_needed) +{ + /* @todo Can't we simply remove the last datagram in the + * linked list behind reassdatagrams? + */ + struct ip_reassdata *r, *oldest, *prev, *oldest_prev; + int pbufs_freed = 0, pbufs_freed_current; + int other_datagrams; + + /* Free datagrams until being allowed to enqueue 'pbufs_needed' pbufs, + * but don't free the datagram that 'fraghdr' belongs to! */ + do { + oldest = NULL; + prev = NULL; + oldest_prev = NULL; + other_datagrams = 0; + r = reassdatagrams; + while (r != NULL) { + if (!IP_ADDRESSES_AND_ID_MATCH(&r->iphdr, fraghdr)) { + /* Not the same datagram as fraghdr */ + other_datagrams++; + if (oldest == NULL) { + oldest = r; + oldest_prev = prev; + } else if (r->timer <= oldest->timer) { + /* older than the previous oldest */ + oldest = r; + oldest_prev = prev; + } + } + if (r->next != NULL) { + prev = r; + } + r = r->next; + } + if (oldest != NULL) { + pbufs_freed_current = ip_reass_free_complete_datagram(oldest, oldest_prev); + pbufs_freed += pbufs_freed_current; + } + } while ((pbufs_freed < pbufs_needed) && (other_datagrams > 1)); + return pbufs_freed; +} +#endif /* IP_REASS_FREE_OLDEST */ + +/** + * Enqueues a new fragment into the fragment queue + * @param fraghdr points to the new fragments IP hdr + * @param clen number of pbufs needed to enqueue (used for freeing other datagrams if not enough space) + * @return A pointer to the queue location into which the fragment was enqueued + */ +static struct ip_reassdata * +ip_reass_enqueue_new_datagram(struct ip_hdr *fraghdr, int clen) +{ + struct ip_reassdata *ipr; +#if ! IP_REASS_FREE_OLDEST + LWIP_UNUSED_ARG(clen); +#endif + + /* No matching previous fragment found, allocate a new reassdata struct */ + ipr = (struct ip_reassdata *)memp_malloc(MEMP_REASSDATA); + if (ipr == NULL) { +#if IP_REASS_FREE_OLDEST + if (ip_reass_remove_oldest_datagram(fraghdr, clen) >= clen) { + ipr = (struct ip_reassdata *)memp_malloc(MEMP_REASSDATA); + } + if (ipr == NULL) +#endif /* IP_REASS_FREE_OLDEST */ + { + IPFRAG_STATS_INC(ip_frag.memerr); + LWIP_DEBUGF(IP_REASS_DEBUG, ("Failed to alloc reassdata struct\n")); + return NULL; + } + } + memset(ipr, 0, sizeof(struct ip_reassdata)); + ipr->timer = IP_REASS_MAXAGE; + + /* enqueue the new structure to the front of the list */ + ipr->next = reassdatagrams; + reassdatagrams = ipr; + /* copy the ip header for later tests and input */ + /* @todo: no ip options supported? */ + SMEMCPY(&(ipr->iphdr), fraghdr, IP_HLEN); + return ipr; +} + +/** + * Dequeues a datagram from the datagram queue. Doesn't deallocate the pbufs. + * @param ipr points to the queue entry to dequeue + */ +static void +ip_reass_dequeue_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev) +{ + /* dequeue the reass struct */ + if (reassdatagrams == ipr) { + /* it was the first in the list */ + reassdatagrams = ipr->next; + } else { + /* it wasn't the first, so it must have a valid 'prev' */ + LWIP_ASSERT("sanity check linked list", prev != NULL); + prev->next = ipr->next; + } + + /* now we can free the ip_reassdata struct */ + memp_free(MEMP_REASSDATA, ipr); +} + +/** + * Chain a new pbuf into the pbuf list that composes the datagram. The pbuf list + * will grow over time as new pbufs are rx. + * Also checks that the datagram passes basic continuity checks (if the last + * fragment was received at least once). + * @param ipr points to the reassembly state + * @param new_p points to the pbuf for the current fragment + * @param is_last is 1 if this pbuf has MF==0 (ipr->flags not updated yet) + * @return see IP_REASS_VALIDATE_* defines + */ +static int +ip_reass_chain_frag_into_datagram_and_validate(struct ip_reassdata *ipr, struct pbuf *new_p, int is_last) +{ + struct ip_reass_helper *iprh, *iprh_tmp, *iprh_prev = NULL; + struct pbuf *q; + u16_t offset, len; + u8_t hlen; + struct ip_hdr *fraghdr; + int valid = 1; + + /* Extract length and fragment offset from current fragment */ + fraghdr = (struct ip_hdr *)new_p->payload; + len = lwip_ntohs(IPH_LEN(fraghdr)); + hlen = IPH_HL_BYTES(fraghdr); + if (hlen > len) { + /* invalid datagram */ + return IP_REASS_VALIDATE_PBUF_DROPPED; + } + len = (u16_t)(len - hlen); + offset = IPH_OFFSET_BYTES(fraghdr); + + /* overwrite the fragment's ip header from the pbuf with our helper struct, + * and setup the embedded helper structure. */ + /* make sure the struct ip_reass_helper fits into the IP header */ + LWIP_ASSERT("sizeof(struct ip_reass_helper) <= IP_HLEN", + sizeof(struct ip_reass_helper) <= IP_HLEN); + iprh = (struct ip_reass_helper *)new_p->payload; + iprh->next_pbuf = NULL; + iprh->start = offset; + iprh->end = (u16_t)(offset + len); + if (iprh->end < offset) { + /* u16_t overflow, cannot handle this */ + return IP_REASS_VALIDATE_PBUF_DROPPED; + } + + /* Iterate through until we either get to the end of the list (append), + * or we find one with a larger offset (insert). */ + for (q = ipr->p; q != NULL;) { + iprh_tmp = (struct ip_reass_helper *)q->payload; + if (iprh->start < iprh_tmp->start) { + /* the new pbuf should be inserted before this */ + iprh->next_pbuf = q; + if (iprh_prev != NULL) { + /* not the fragment with the lowest offset */ +#if IP_REASS_CHECK_OVERLAP + if ((iprh->start < iprh_prev->end) || (iprh->end > iprh_tmp->start)) { + /* fragment overlaps with previous or following, throw away */ + return IP_REASS_VALIDATE_PBUF_DROPPED; + } +#endif /* IP_REASS_CHECK_OVERLAP */ + iprh_prev->next_pbuf = new_p; + if (iprh_prev->end != iprh->start) { + /* There is a fragment missing between the current + * and the previous fragment */ + valid = 0; + } + } else { +#if IP_REASS_CHECK_OVERLAP + if (iprh->end > iprh_tmp->start) { + /* fragment overlaps with following, throw away */ + return IP_REASS_VALIDATE_PBUF_DROPPED; + } +#endif /* IP_REASS_CHECK_OVERLAP */ + /* fragment with the lowest offset */ + ipr->p = new_p; + } + break; + } else if (iprh->start == iprh_tmp->start) { + /* received the same datagram twice: no need to keep the datagram */ + return IP_REASS_VALIDATE_PBUF_DROPPED; +#if IP_REASS_CHECK_OVERLAP + } else if (iprh->start < iprh_tmp->end) { + /* overlap: no need to keep the new datagram */ + return IP_REASS_VALIDATE_PBUF_DROPPED; +#endif /* IP_REASS_CHECK_OVERLAP */ + } else { + /* Check if the fragments received so far have no holes. */ + if (iprh_prev != NULL) { + if (iprh_prev->end != iprh_tmp->start) { + /* There is a fragment missing between the current + * and the previous fragment */ + valid = 0; + } + } + } + q = iprh_tmp->next_pbuf; + iprh_prev = iprh_tmp; + } + + /* If q is NULL, then we made it to the end of the list. Determine what to do now */ + if (q == NULL) { + if (iprh_prev != NULL) { + /* this is (for now), the fragment with the highest offset: + * chain it to the last fragment */ +#if IP_REASS_CHECK_OVERLAP + LWIP_ASSERT("check fragments don't overlap", iprh_prev->end <= iprh->start); +#endif /* IP_REASS_CHECK_OVERLAP */ + iprh_prev->next_pbuf = new_p; + if (iprh_prev->end != iprh->start) { + valid = 0; + } + } else { +#if IP_REASS_CHECK_OVERLAP + LWIP_ASSERT("no previous fragment, this must be the first fragment!", + ipr->p == NULL); +#endif /* IP_REASS_CHECK_OVERLAP */ + /* this is the first fragment we ever received for this ip datagram */ + ipr->p = new_p; + } + } + + /* At this point, the validation part begins: */ + /* If we already received the last fragment */ + if (is_last || ((ipr->flags & IP_REASS_FLAG_LASTFRAG) != 0)) { + /* and had no holes so far */ + if (valid) { + /* then check if the rest of the fragments is here */ + /* Check if the queue starts with the first datagram */ + if ((ipr->p == NULL) || (((struct ip_reass_helper *)ipr->p->payload)->start != 0)) { + valid = 0; + } else { + /* and check that there are no holes after this datagram */ + iprh_prev = iprh; + q = iprh->next_pbuf; + while (q != NULL) { + iprh = (struct ip_reass_helper *)q->payload; + if (iprh_prev->end != iprh->start) { + valid = 0; + break; + } + iprh_prev = iprh; + q = iprh->next_pbuf; + } + /* if still valid, all fragments are received + * (because to the MF==0 already arrived */ + if (valid) { + LWIP_ASSERT("sanity check", ipr->p != NULL); + LWIP_ASSERT("sanity check", + ((struct ip_reass_helper *)ipr->p->payload) != iprh); + LWIP_ASSERT("validate_datagram:next_pbuf!=NULL", + iprh->next_pbuf == NULL); + } + } + } + /* If valid is 0 here, there are some fragments missing in the middle + * (since MF == 0 has already arrived). Such datagrams simply time out if + * no more fragments are received... */ + return valid ? IP_REASS_VALIDATE_TELEGRAM_FINISHED : IP_REASS_VALIDATE_PBUF_QUEUED; + } + /* If we come here, not all fragments were received, yet! */ + return IP_REASS_VALIDATE_PBUF_QUEUED; /* not yet valid! */ +} + +/** + * Reassembles incoming IP fragments into an IP datagram. + * + * @param p points to a pbuf chain of the fragment + * @return NULL if reassembly is incomplete, ? otherwise + */ +struct pbuf * +ip4_reass(struct pbuf *p) +{ + struct pbuf *r; + struct ip_hdr *fraghdr; + struct ip_reassdata *ipr; + struct ip_reass_helper *iprh; + u16_t offset, len, clen; + u8_t hlen; + int valid; + int is_last; + + IPFRAG_STATS_INC(ip_frag.recv); + MIB2_STATS_INC(mib2.ipreasmreqds); + + fraghdr = (struct ip_hdr *)p->payload; + + if (IPH_HL_BYTES(fraghdr) != IP_HLEN) { + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip4_reass: IP options currently not supported!\n")); + IPFRAG_STATS_INC(ip_frag.err); + goto nullreturn; + } + + offset = IPH_OFFSET_BYTES(fraghdr); + len = lwip_ntohs(IPH_LEN(fraghdr)); + hlen = IPH_HL_BYTES(fraghdr); + if (hlen > len) { + /* invalid datagram */ + goto nullreturn; + } + len = (u16_t)(len - hlen); + + /* Check if we are allowed to enqueue more datagrams. */ + clen = pbuf_clen(p); + if ((ip_reass_pbufcount + clen) > IP_REASS_MAX_PBUFS) { +#if IP_REASS_FREE_OLDEST + if (!ip_reass_remove_oldest_datagram(fraghdr, clen) || + ((ip_reass_pbufcount + clen) > IP_REASS_MAX_PBUFS)) +#endif /* IP_REASS_FREE_OLDEST */ + { + /* No datagram could be freed and still too many pbufs enqueued */ + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip4_reass: Overflow condition: pbufct=%d, clen=%d, MAX=%d\n", + ip_reass_pbufcount, clen, IP_REASS_MAX_PBUFS)); + IPFRAG_STATS_INC(ip_frag.memerr); + /* @todo: send ICMP time exceeded here? */ + /* drop this pbuf */ + goto nullreturn; + } + } + + /* Look for the datagram the fragment belongs to in the current datagram queue, + * remembering the previous in the queue for later dequeueing. */ + for (ipr = reassdatagrams; ipr != NULL; ipr = ipr->next) { + /* Check if the incoming fragment matches the one currently present + in the reassembly buffer. If so, we proceed with copying the + fragment into the buffer. */ + if (IP_ADDRESSES_AND_ID_MATCH(&ipr->iphdr, fraghdr)) { + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip4_reass: matching previous fragment ID=%"X16_F"\n", + lwip_ntohs(IPH_ID(fraghdr)))); + IPFRAG_STATS_INC(ip_frag.cachehit); + break; + } + } + + if (ipr == NULL) { + /* Enqueue a new datagram into the datagram queue */ + ipr = ip_reass_enqueue_new_datagram(fraghdr, clen); + /* Bail if unable to enqueue */ + if (ipr == NULL) { + goto nullreturn; + } + } else { + if (((lwip_ntohs(IPH_OFFSET(fraghdr)) & IP_OFFMASK) == 0) && + ((lwip_ntohs(IPH_OFFSET(&ipr->iphdr)) & IP_OFFMASK) != 0)) { + /* ipr->iphdr is not the header from the first fragment, but fraghdr is + * -> copy fraghdr into ipr->iphdr since we want to have the header + * of the first fragment (for ICMP time exceeded and later, for copying + * all options, if supported)*/ + SMEMCPY(&ipr->iphdr, fraghdr, IP_HLEN); + } + } + + /* At this point, we have either created a new entry or pointing + * to an existing one */ + + /* check for 'no more fragments', and update queue entry*/ + is_last = (IPH_OFFSET(fraghdr) & PP_NTOHS(IP_MF)) == 0; + if (is_last) { + u16_t datagram_len = (u16_t)(offset + len); + if ((datagram_len < offset) || (datagram_len > (0xFFFF - IP_HLEN))) { + /* u16_t overflow, cannot handle this */ + goto nullreturn_ipr; + } + } + /* find the right place to insert this pbuf */ + /* @todo: trim pbufs if fragments are overlapping */ + valid = ip_reass_chain_frag_into_datagram_and_validate(ipr, p, is_last); + if (valid == IP_REASS_VALIDATE_PBUF_DROPPED) { + goto nullreturn_ipr; + } + /* if we come here, the pbuf has been enqueued */ + + /* Track the current number of pbufs current 'in-flight', in order to limit + the number of fragments that may be enqueued at any one time + (overflow checked by testing against IP_REASS_MAX_PBUFS) */ + ip_reass_pbufcount = (u16_t)(ip_reass_pbufcount + clen); + if (is_last) { + u16_t datagram_len = (u16_t)(offset + len); + ipr->datagram_len = datagram_len; + ipr->flags |= IP_REASS_FLAG_LASTFRAG; + LWIP_DEBUGF(IP_REASS_DEBUG, + ("ip4_reass: last fragment seen, total len %"S16_F"\n", + ipr->datagram_len)); + } + + if (valid == IP_REASS_VALIDATE_TELEGRAM_FINISHED) { + struct ip_reassdata *ipr_prev; + /* the totally last fragment (flag more fragments = 0) was received at least + * once AND all fragments are received */ + u16_t datagram_len = (u16_t)(ipr->datagram_len + IP_HLEN); + + /* save the second pbuf before copying the header over the pointer */ + r = ((struct ip_reass_helper *)ipr->p->payload)->next_pbuf; + + /* copy the original ip header back to the first pbuf */ + fraghdr = (struct ip_hdr *)(ipr->p->payload); + SMEMCPY(fraghdr, &ipr->iphdr, IP_HLEN); + IPH_LEN_SET(fraghdr, lwip_htons(datagram_len)); + IPH_OFFSET_SET(fraghdr, 0); + IPH_CHKSUM_SET(fraghdr, 0); + /* @todo: do we need to set/calculate the correct checksum? */ +#if CHECKSUM_GEN_IP + IF__NETIF_CHECKSUM_ENABLED(ip_current_input_netif(), NETIF_CHECKSUM_GEN_IP) { + IPH_CHKSUM_SET(fraghdr, inet_chksum(fraghdr, IP_HLEN)); + } +#endif /* CHECKSUM_GEN_IP */ + + p = ipr->p; + + /* chain together the pbufs contained within the reass_data list. */ + while (r != NULL) { + iprh = (struct ip_reass_helper *)r->payload; + + /* hide the ip header for every succeeding fragment */ + pbuf_remove_header(r, IP_HLEN); + pbuf_cat(p, r); + r = iprh->next_pbuf; + } + + /* find the previous entry in the linked list */ + if (ipr == reassdatagrams) { + ipr_prev = NULL; + } else { + for (ipr_prev = reassdatagrams; ipr_prev != NULL; ipr_prev = ipr_prev->next) { + if (ipr_prev->next == ipr) { + break; + } + } + } + + /* release the sources allocate for the fragment queue entry */ + ip_reass_dequeue_datagram(ipr, ipr_prev); + + /* and adjust the number of pbufs currently queued for reassembly. */ + clen = pbuf_clen(p); + LWIP_ASSERT("ip_reass_pbufcount >= clen", ip_reass_pbufcount >= clen); + ip_reass_pbufcount = (u16_t)(ip_reass_pbufcount - clen); + + MIB2_STATS_INC(mib2.ipreasmoks); + + /* Return the pbuf chain */ + return p; + } + /* the datagram is not (yet?) reassembled completely */ + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_pbufcount: %d out\n", ip_reass_pbufcount)); + return NULL; + +nullreturn_ipr: + LWIP_ASSERT("ipr != NULL", ipr != NULL); + if (ipr->p == NULL) { + /* dropped pbuf after creating a new datagram entry: remove the entry, too */ + LWIP_ASSERT("not firstalthough just enqueued", ipr == reassdatagrams); + ip_reass_dequeue_datagram(ipr, NULL); + } + +nullreturn: + LWIP_DEBUGF(IP_REASS_DEBUG, ("ip4_reass: nullreturn\n")); + IPFRAG_STATS_INC(ip_frag.drop); + pbuf_free(p); + return NULL; +} +#endif /* IP_REASSEMBLY */ + +#if IP_FRAG +#if !LWIP_NETIF_TX_SINGLE_PBUF +/** Allocate a new struct pbuf_custom_ref */ +static struct pbuf_custom_ref * +ip_frag_alloc_pbuf_custom_ref(void) +{ + return (struct pbuf_custom_ref *)memp_malloc(MEMP_FRAG_PBUF); +} + +/** Free a struct pbuf_custom_ref */ +static void +ip_frag_free_pbuf_custom_ref(struct pbuf_custom_ref *p) +{ + LWIP_ASSERT("p != NULL", p != NULL); + memp_free(MEMP_FRAG_PBUF, p); +} + +/** Free-callback function to free a 'struct pbuf_custom_ref', called by + * pbuf_free. */ +static void +ipfrag_free_pbuf_custom(struct pbuf *p) +{ + struct pbuf_custom_ref *pcr = (struct pbuf_custom_ref *)p; + LWIP_ASSERT("pcr != NULL", pcr != NULL); + LWIP_ASSERT("pcr == p", (void *)pcr == (void *)p); + if (pcr->original != NULL) { + pbuf_free(pcr->original); + } + ip_frag_free_pbuf_custom_ref(pcr); +} +#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */ + +/** + * Fragment an IP datagram if too large for the netif. + * + * Chop the datagram in MTU sized chunks and send them in order + * by pointing PBUF_REFs into p. + * + * @param p ip packet to send + * @param netif the netif on which to send + * @param dest destination ip address to which to send + * + * @return ERR_OK if sent successfully, err_t otherwise + */ +err_t +ip4_frag(struct pbuf *p, struct netif *netif, const ip4_addr_t *dest) +{ + struct pbuf *rambuf; +#if !LWIP_NETIF_TX_SINGLE_PBUF + struct pbuf *newpbuf; + u16_t newpbuflen = 0; + u16_t left_to_copy; +#endif + struct ip_hdr *original_iphdr; + struct ip_hdr *iphdr; + const u16_t nfb = (u16_t)((netif->mtu - IP_HLEN) / 8); + u16_t left, fragsize; + u16_t ofo; + int last; + u16_t poff = IP_HLEN; + u16_t tmp; + int mf_set; + + original_iphdr = (struct ip_hdr *)p->payload; + iphdr = original_iphdr; + if (IPH_HL_BYTES(iphdr) != IP_HLEN) { + /* ip4_frag() does not support IP options */ + return ERR_VAL; + } + LWIP_ERROR("ip4_frag(): pbuf too short", p->len >= IP_HLEN, return ERR_VAL); + + /* Save original offset */ + tmp = lwip_ntohs(IPH_OFFSET(iphdr)); + ofo = tmp & IP_OFFMASK; + /* already fragmented? if so, the last fragment we create must have MF, too */ + mf_set = tmp & IP_MF; + + left = (u16_t)(p->tot_len - IP_HLEN); + + while (left) { + /* Fill this fragment */ + fragsize = LWIP_MIN(left, (u16_t)(nfb * 8)); + +#if LWIP_NETIF_TX_SINGLE_PBUF + rambuf = pbuf_alloc(PBUF_IP, fragsize, PBUF_RAM); + if (rambuf == NULL) { + goto memerr; + } + LWIP_ASSERT("this needs a pbuf in one piece!", + (rambuf->len == rambuf->tot_len) && (rambuf->next == NULL)); + poff += pbuf_copy_partial(p, rambuf->payload, fragsize, poff); + /* make room for the IP header */ + if (pbuf_add_header(rambuf, IP_HLEN)) { + pbuf_free(rambuf); + goto memerr; + } + /* fill in the IP header */ + SMEMCPY(rambuf->payload, original_iphdr, IP_HLEN); + iphdr = (struct ip_hdr *)rambuf->payload; +#else /* LWIP_NETIF_TX_SINGLE_PBUF */ + /* When not using a static buffer, create a chain of pbufs. + * The first will be a PBUF_RAM holding the link and IP header. + * The rest will be PBUF_REFs mirroring the pbuf chain to be fragged, + * but limited to the size of an mtu. + */ + rambuf = pbuf_alloc(PBUF_LINK, IP_HLEN, PBUF_RAM); + if (rambuf == NULL) { + goto memerr; + } + LWIP_ASSERT("this needs a pbuf in one piece!", + (rambuf->len >= (IP_HLEN))); + SMEMCPY(rambuf->payload, original_iphdr, IP_HLEN); + iphdr = (struct ip_hdr *)rambuf->payload; + + left_to_copy = fragsize; + while (left_to_copy) { + struct pbuf_custom_ref *pcr; + u16_t plen = (u16_t)(p->len - poff); + LWIP_ASSERT("p->len >= poff", p->len >= poff); + newpbuflen = LWIP_MIN(left_to_copy, plen); + /* Is this pbuf already empty? */ + if (!newpbuflen) { + poff = 0; + p = p->next; + continue; + } + pcr = ip_frag_alloc_pbuf_custom_ref(); + if (pcr == NULL) { + pbuf_free(rambuf); + goto memerr; + } + /* Mirror this pbuf, although we might not need all of it. */ + newpbuf = pbuf_alloced_custom(PBUF_RAW, newpbuflen, PBUF_REF, &pcr->pc, + (u8_t *)p->payload + poff, newpbuflen); + if (newpbuf == NULL) { + ip_frag_free_pbuf_custom_ref(pcr); + pbuf_free(rambuf); + goto memerr; + } + pbuf_ref(p); + pcr->original = p; + pcr->pc.custom_free_function = ipfrag_free_pbuf_custom; + + /* Add it to end of rambuf's chain, but using pbuf_cat, not pbuf_chain + * so that it is removed when pbuf_dechain is later called on rambuf. + */ + pbuf_cat(rambuf, newpbuf); + left_to_copy = (u16_t)(left_to_copy - newpbuflen); + if (left_to_copy) { + poff = 0; + p = p->next; + } + } + poff = (u16_t)(poff + newpbuflen); +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + + /* Correct header */ + last = (left <= netif->mtu - IP_HLEN); + + /* Set new offset and MF flag */ + tmp = (IP_OFFMASK & (ofo)); + if (!last || mf_set) { + /* the last fragment has MF set if the input frame had it */ + tmp = tmp | IP_MF; + } + IPH_OFFSET_SET(iphdr, lwip_htons(tmp)); + IPH_LEN_SET(iphdr, lwip_htons((u16_t)(fragsize + IP_HLEN))); + IPH_CHKSUM_SET(iphdr, 0); +#if CHECKSUM_GEN_IP + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_IP) { + IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN)); + } +#endif /* CHECKSUM_GEN_IP */ + + /* No need for separate header pbuf - we allowed room for it in rambuf + * when allocated. + */ + netif->output(netif, rambuf, dest); + IPFRAG_STATS_INC(ip_frag.xmit); + + /* Unfortunately we can't reuse rambuf - the hardware may still be + * using the buffer. Instead we free it (and the ensuing chain) and + * recreate it next time round the loop. If we're lucky the hardware + * will have already sent the packet, the free will really free, and + * there will be zero memory penalty. + */ + + pbuf_free(rambuf); + left = (u16_t)(left - fragsize); + ofo = (u16_t)(ofo + nfb); + } + MIB2_STATS_INC(mib2.ipfragoks); + return ERR_OK; +memerr: + MIB2_STATS_INC(mib2.ipfragfails); + return ERR_MEM; +} +#endif /* IP_FRAG */ + +#endif /* LWIP_IPV4 */ diff --git a/lib/lwip/core/ipv6/dhcp6.c b/lib/lwip/core/ipv6/dhcp6.c new file mode 100644 index 0000000000..e6a7e64da9 --- /dev/null +++ b/lib/lwip/core/ipv6/dhcp6.c @@ -0,0 +1,821 @@ +/** + * @file + * + * @defgroup dhcp6 DHCPv6 + * @ingroup ip6 + * DHCPv6 client: IPv6 address autoconfiguration as per + * RFC 3315 (stateful DHCPv6) and + * RFC 3736 (stateless DHCPv6). + * + * For now, only stateless DHCPv6 is implemented! + * + * TODO: + * - enable/disable API to not always start when RA is received + * - stateful DHCPv6 (for now, only stateless DHCPv6 for DNS and NTP servers works) + * - create Client Identifier? + * - only start requests if a valid local address is available on the netif + * - only start information requests if required (not for every RA) + * + * dhcp6_enable_stateful() enables stateful DHCPv6 for a netif (stateless disabled)<br> + * dhcp6_enable_stateless() enables stateless DHCPv6 for a netif (stateful disabled)<br> + * dhcp6_disable() disable DHCPv6 for a netif + * + * When enabled, requests are only issued after receipt of RA with the + * corresponding bits set. + */ + +/* + * Copyright (c) 2018 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + */ + +#include "lwip/opt.h" + +#if LWIP_IPV6 && LWIP_IPV6_DHCP6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/dhcp6.h" +#include "lwip/prot/dhcp6.h" +#include "lwip/def.h" +#include "lwip/udp.h" +#include "lwip/dns.h" + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif +#ifndef LWIP_HOOK_DHCP6_APPEND_OPTIONS +#define LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, state, msg, msg_type, options_len_ptr, max_len) +#endif +#ifndef LWIP_HOOK_DHCP6_PARSE_OPTION +#define LWIP_HOOK_DHCP6_PARSE_OPTION(netif, dhcp6, state, msg, msg_type, option, len, pbuf, offset) do { LWIP_UNUSED_ARG(msg); } while(0) +#endif + +#if LWIP_DNS && LWIP_DHCP6_MAX_DNS_SERVERS +#if DNS_MAX_SERVERS > LWIP_DHCP6_MAX_DNS_SERVERS +#define LWIP_DHCP6_PROVIDE_DNS_SERVERS LWIP_DHCP6_MAX_DNS_SERVERS +#else +#define LWIP_DHCP6_PROVIDE_DNS_SERVERS DNS_MAX_SERVERS +#endif +#else +#define LWIP_DHCP6_PROVIDE_DNS_SERVERS 0 +#endif + + +/** Option handling: options are parsed in dhcp6_parse_reply + * and saved in an array where other functions can load them from. + * This might be moved into the struct dhcp6 (not necessarily since + * lwIP is single-threaded and the array is only used while in recv + * callback). */ +enum dhcp6_option_idx { + DHCP6_OPTION_IDX_CLI_ID = 0, + DHCP6_OPTION_IDX_SERVER_ID, +#if LWIP_DHCP6_PROVIDE_DNS_SERVERS + DHCP6_OPTION_IDX_DNS_SERVER, + DHCP6_OPTION_IDX_DOMAIN_LIST, +#endif /* LWIP_DHCP_PROVIDE_DNS_SERVERS */ +#if LWIP_DHCP6_GET_NTP_SRV + DHCP6_OPTION_IDX_NTP_SERVER, +#endif /* LWIP_DHCP_GET_NTP_SRV */ + DHCP6_OPTION_IDX_MAX +}; + +struct dhcp6_option_info { + u8_t option_given; + u16_t val_start; + u16_t val_length; +}; + +/** Holds the decoded option info, only valid while in dhcp6_recv. */ +struct dhcp6_option_info dhcp6_rx_options[DHCP6_OPTION_IDX_MAX]; + +#define dhcp6_option_given(dhcp6, idx) (dhcp6_rx_options[idx].option_given != 0) +#define dhcp6_got_option(dhcp6, idx) (dhcp6_rx_options[idx].option_given = 1) +#define dhcp6_clear_option(dhcp6, idx) (dhcp6_rx_options[idx].option_given = 0) +#define dhcp6_clear_all_options(dhcp6) (memset(dhcp6_rx_options, 0, sizeof(dhcp6_rx_options))) +#define dhcp6_get_option_start(dhcp6, idx) (dhcp6_rx_options[idx].val_start) +#define dhcp6_get_option_length(dhcp6, idx) (dhcp6_rx_options[idx].val_length) +#define dhcp6_set_option(dhcp6, idx, start, len) do { dhcp6_rx_options[idx].val_start = (start); dhcp6_rx_options[idx].val_length = (len); }while(0) + + +const ip_addr_t dhcp6_All_DHCP6_Relay_Agents_and_Servers = IPADDR6_INIT_HOST(0xFF020000, 0, 0, 0x00010002); +const ip_addr_t dhcp6_All_DHCP6_Servers = IPADDR6_INIT_HOST(0xFF020000, 0, 0, 0x00010003); + +static struct udp_pcb *dhcp6_pcb; +static u8_t dhcp6_pcb_refcount; + + +/* receive, unfold, parse and free incoming messages */ +static void dhcp6_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port); + +/** Ensure DHCP PCB is allocated and bound */ +static err_t +dhcp6_inc_pcb_refcount(void) +{ + if (dhcp6_pcb_refcount == 0) { + LWIP_ASSERT("dhcp6_inc_pcb_refcount(): memory leak", dhcp6_pcb == NULL); + + /* allocate UDP PCB */ + dhcp6_pcb = udp_new_ip6(); + + if (dhcp6_pcb == NULL) { + return ERR_MEM; + } + + ip_set_option(dhcp6_pcb, SOF_BROADCAST); + + /* set up local and remote port for the pcb -> listen on all interfaces on all src/dest IPs */ + udp_bind(dhcp6_pcb, IP6_ADDR_ANY, DHCP6_CLIENT_PORT); + udp_recv(dhcp6_pcb, dhcp6_recv, NULL); + } + + dhcp6_pcb_refcount++; + + return ERR_OK; +} + +/** Free DHCP PCB if the last netif stops using it */ +static void +dhcp6_dec_pcb_refcount(void) +{ + LWIP_ASSERT("dhcp6_pcb_refcount(): refcount error", (dhcp6_pcb_refcount > 0)); + dhcp6_pcb_refcount--; + + if (dhcp6_pcb_refcount == 0) { + udp_remove(dhcp6_pcb); + dhcp6_pcb = NULL; + } +} + +/** + * @ingroup dhcp6 + * Set a statically allocated struct dhcp6 to work with. + * Using this prevents dhcp6_start to allocate it using mem_malloc. + * + * @param netif the netif for which to set the struct dhcp + * @param dhcp6 (uninitialised) dhcp6 struct allocated by the application + */ +void +dhcp6_set_struct(struct netif *netif, struct dhcp6 *dhcp6) +{ + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_ASSERT("dhcp6 != NULL", dhcp6 != NULL); + LWIP_ASSERT("netif already has a struct dhcp6 set", netif_dhcp6_data(netif) == NULL); + + /* clear data structure */ + memset(dhcp6, 0, sizeof(struct dhcp6)); + /* dhcp6_set_state(&dhcp, DHCP6_STATE_OFF); */ + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, dhcp6); +} + +/** + * @ingroup dhcp6 + * Removes a struct dhcp6 from a netif. + * + * ATTENTION: Only use this when not using dhcp6_set_struct() to allocate the + * struct dhcp6 since the memory is passed back to the heap. + * + * @param netif the netif from which to remove the struct dhcp + */ +void dhcp6_cleanup(struct netif *netif) +{ + LWIP_ASSERT("netif != NULL", netif != NULL); + + if (netif_dhcp6_data(netif) != NULL) { + mem_free(netif_dhcp6_data(netif)); + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL); + } +} + +static struct dhcp6* +dhcp6_get_struct(struct netif *netif, const char *dbg_requester) +{ + struct dhcp6 *dhcp6 = netif_dhcp6_data(netif); + if (dhcp6 == NULL) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("%s: mallocing new DHCPv6 client\n", dbg_requester)); + dhcp6 = (struct dhcp6 *)mem_malloc(sizeof(struct dhcp6)); + if (dhcp6 == NULL) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("%s: could not allocate dhcp6\n", dbg_requester)); + return NULL; + } + + /* clear data structure, this implies DHCP6_STATE_OFF */ + memset(dhcp6, 0, sizeof(struct dhcp6)); + /* store this dhcp6 client in the netif */ + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, dhcp6); + } else { + /* already has DHCP6 client attached */ + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("%s: using existing DHCPv6 client\n", dbg_requester)); + } + + if (!dhcp6->pcb_allocated) { + if (dhcp6_inc_pcb_refcount() != ERR_OK) { /* ensure DHCP6 PCB is allocated */ + mem_free(dhcp6); + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL); + return NULL; + } + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("%s: allocated dhcp6\n", dbg_requester)); + dhcp6->pcb_allocated = 1; + } + return dhcp6; +} + +/* + * Set the DHCPv6 state + * If the state changed, reset the number of tries. + */ +static void +dhcp6_set_state(struct dhcp6 *dhcp6, u8_t new_state, const char *dbg_caller) +{ + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("DHCPv6 state: %d -> %d (%s)\n", + dhcp6->state, new_state, dbg_caller)); + if (new_state != dhcp6->state) { + dhcp6->state = new_state; + dhcp6->tries = 0; + dhcp6->request_timeout = 0; + } +} + +static int +dhcp6_stateless_enabled(struct dhcp6 *dhcp6) +{ + if ((dhcp6->state == DHCP6_STATE_STATELESS_IDLE) || + (dhcp6->state == DHCP6_STATE_REQUESTING_CONFIG)) { + return 1; + } + return 0; +} + +/*static int +dhcp6_stateful_enabled(struct dhcp6 *dhcp6) +{ + if (dhcp6->state == DHCP6_STATE_OFF) { + return 0; + } + if (dhcp6_stateless_enabled(dhcp6)) { + return 0; + } + return 1; +}*/ + +/** + * @ingroup dhcp6 + * Enable stateful DHCPv6 on this netif + * Requests are sent on receipt of an RA message with the + * ND6_RA_FLAG_MANAGED_ADDR_CONFIG flag set. + * + * A struct dhcp6 will be allocated for this netif if not + * set via @ref dhcp6_set_struct before. + * + * @todo: stateful DHCPv6 not supported, yet + */ +err_t +dhcp6_enable_stateful(struct netif *netif) +{ + LWIP_UNUSED_ARG(netif); + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("stateful dhcp6 not implemented yet\n")); + return ERR_VAL; +} + +/** + * @ingroup dhcp6 + * Enable stateless DHCPv6 on this netif + * Requests are sent on receipt of an RA message with the + * ND6_RA_FLAG_OTHER_CONFIG flag set. + * + * A struct dhcp6 will be allocated for this netif if not + * set via @ref dhcp6_set_struct before. + */ +err_t +dhcp6_enable_stateless(struct netif *netif) +{ + struct dhcp6 *dhcp6; + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_enable_stateless(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num)); + + dhcp6 = dhcp6_get_struct(netif, "dhcp6_enable_stateless()"); + if (dhcp6 == NULL) { + return ERR_MEM; + } + if (dhcp6_stateless_enabled(dhcp6)) { + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp6_enable_stateless(): stateless DHCPv6 already enabled\n")); + return ERR_OK; + } else if (dhcp6->state != DHCP6_STATE_OFF) { + /* stateful running */ + /* @todo: stop stateful once it is implemented */ + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp6_enable_stateless(): switching from stateful to stateless DHCPv6\n")); + } + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp6_enable_stateless(): stateless DHCPv6 enabled\n")); + dhcp6_set_state(dhcp6, DHCP6_STATE_STATELESS_IDLE, "dhcp6_enable_stateless"); + return ERR_OK; +} + +/** + * @ingroup dhcp6 + * Disable stateful or stateless DHCPv6 on this netif + * Requests are sent on receipt of an RA message with the + * ND6_RA_FLAG_OTHER_CONFIG flag set. + */ +void +dhcp6_disable(struct netif *netif) +{ + struct dhcp6 *dhcp6; + + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_disable(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num)); + + dhcp6 = netif_dhcp6_data(netif); + if (dhcp6 != NULL) { + if (dhcp6->state != DHCP6_STATE_OFF) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_disable(): DHCPv6 disabled (old state: %s)\n", + (dhcp6_stateless_enabled(dhcp6) ? "stateless" : "stateful"))); + dhcp6_set_state(dhcp6, DHCP6_STATE_OFF, "dhcp6_disable"); + if (dhcp6->pcb_allocated != 0) { + dhcp6_dec_pcb_refcount(); /* free DHCPv6 PCB if not needed any more */ + dhcp6->pcb_allocated = 0; + } + } + } +} + +/** + * Create a DHCPv6 request, fill in common headers + * + * @param netif the netif under DHCPv6 control + * @param dhcp6 dhcp6 control struct + * @param message_type message type of the request + * @param opt_len_alloc option length to allocate + * @param options_out_len option length on exit + * @return a pbuf for the message + */ +static struct pbuf * +dhcp6_create_msg(struct netif *netif, struct dhcp6 *dhcp6, u8_t message_type, + u16_t opt_len_alloc, u16_t *options_out_len) +{ + struct pbuf *p_out; + struct dhcp6_msg *msg_out; + + LWIP_ERROR("dhcp6_create_msg: netif != NULL", (netif != NULL), return NULL;); + LWIP_ERROR("dhcp6_create_msg: dhcp6 != NULL", (dhcp6 != NULL), return NULL;); + p_out = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcp6_msg) + opt_len_alloc, PBUF_RAM); + if (p_out == NULL) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, + ("dhcp6_create_msg(): could not allocate pbuf\n")); + return NULL; + } + LWIP_ASSERT("dhcp6_create_msg: check that first pbuf can hold struct dhcp6_msg", + (p_out->len >= sizeof(struct dhcp6_msg) + opt_len_alloc)); + + /* @todo: limit new xid for certain message types? */ + /* reuse transaction identifier in retransmissions */ + if (dhcp6->tries == 0) { + dhcp6->xid = LWIP_RAND() & 0xFFFFFF; + } + + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, + ("transaction id xid(%"X32_F")\n", dhcp6->xid)); + + msg_out = (struct dhcp6_msg *)p_out->payload; + memset(msg_out, 0, sizeof(struct dhcp6_msg) + opt_len_alloc); + + msg_out->msgtype = message_type; + msg_out->transaction_id[0] = (u8_t)(dhcp6->xid >> 16); + msg_out->transaction_id[1] = (u8_t)(dhcp6->xid >> 8); + msg_out->transaction_id[2] = (u8_t)dhcp6->xid; + *options_out_len = 0; + return p_out; +} + +static u16_t +dhcp6_option_short(u16_t options_out_len, u8_t *options, u16_t value) +{ + options[options_out_len++] = (u8_t)((value & 0xff00U) >> 8); + options[options_out_len++] = (u8_t) (value & 0x00ffU); + return options_out_len; +} + +static u16_t +dhcp6_option_optionrequest(u16_t options_out_len, u8_t *options, const u16_t *req_options, + u16_t num_req_options, u16_t max_len) +{ + size_t i; + u16_t ret; + + LWIP_ASSERT("dhcp6_option_optionrequest: options_out_len + sizeof(struct dhcp6_msg) + addlen <= max_len", + sizeof(struct dhcp6_msg) + options_out_len + 4U + (2U * num_req_options) <= max_len); + LWIP_UNUSED_ARG(max_len); + + ret = dhcp6_option_short(options_out_len, options, DHCP6_OPTION_ORO); + ret = dhcp6_option_short(ret, options, 2 * num_req_options); + for (i = 0; i < num_req_options; i++) { + ret = dhcp6_option_short(ret, options, req_options[i]); + } + return ret; +} + +/* All options are added, shrink the pbuf to the required size */ +static void +dhcp6_msg_finalize(u16_t options_out_len, struct pbuf *p_out) +{ + /* shrink the pbuf to the actual content length */ + pbuf_realloc(p_out, (u16_t)(sizeof(struct dhcp6_msg) + options_out_len)); +} + + +#if LWIP_IPV6_DHCP6_STATELESS +static void +dhcp6_information_request(struct netif *netif, struct dhcp6 *dhcp6) +{ + const u16_t requested_options[] = { +#if LWIP_DHCP6_PROVIDE_DNS_SERVERS + DHCP6_OPTION_DNS_SERVERS, + DHCP6_OPTION_DOMAIN_LIST +#endif +#if LWIP_DHCP6_GET_NTP_SRV + , DHCP6_OPTION_SNTP_SERVERS +#endif + }; + + u16_t msecs; + struct pbuf *p_out; + u16_t options_out_len; + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_information_request()\n")); + /* create and initialize the DHCP message header */ + p_out = dhcp6_create_msg(netif, dhcp6, DHCP6_INFOREQUEST, 4 + sizeof(requested_options), &options_out_len); + if (p_out != NULL) { + err_t err; + struct dhcp6_msg *msg_out = (struct dhcp6_msg *)p_out->payload; + u8_t *options = (u8_t *)(msg_out + 1); + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_information_request: making request\n")); + + options_out_len = dhcp6_option_optionrequest(options_out_len, options, requested_options, + LWIP_ARRAYSIZE(requested_options), p_out->len); + LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, DHCP6_STATE_REQUESTING_CONFIG, msg_out, + DHCP6_INFOREQUEST, options_out_len, p_out->len); + dhcp6_msg_finalize(options_out_len, p_out); + + err = udp_sendto_if(dhcp6_pcb, p_out, &dhcp6_All_DHCP6_Relay_Agents_and_Servers, DHCP6_SERVER_PORT, netif); + pbuf_free(p_out); + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_information_request: INFOREQUESTING -> %d\n", (int)err)); + LWIP_UNUSED_ARG(err); + } else { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp6_information_request: could not allocate DHCP6 request\n")); + } + dhcp6_set_state(dhcp6, DHCP6_STATE_REQUESTING_CONFIG, "dhcp6_information_request"); + if (dhcp6->tries < 255) { + dhcp6->tries++; + } + msecs = (u16_t)((dhcp6->tries < 6 ? 1 << dhcp6->tries : 60) * 1000); + dhcp6->request_timeout = (u16_t)((msecs + DHCP6_TIMER_MSECS - 1) / DHCP6_TIMER_MSECS); + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_information_request(): set request timeout %"U16_F" msecs\n", msecs)); +} + +static err_t +dhcp6_request_config(struct netif *netif, struct dhcp6 *dhcp6) +{ + /* stateless mode enabled and no request running? */ + if (dhcp6->state == DHCP6_STATE_STATELESS_IDLE) { + /* send Information-request and wait for answer; setup receive timeout */ + dhcp6_information_request(netif, dhcp6); + } + + return ERR_OK; +} + +static void +dhcp6_abort_config_request(struct dhcp6 *dhcp6) +{ + if (dhcp6->state == DHCP6_STATE_REQUESTING_CONFIG) { + /* abort running request */ + dhcp6_set_state(dhcp6, DHCP6_STATE_STATELESS_IDLE, "dhcp6_abort_config_request"); + } +} + +/* Handle a REPLY to INFOREQUEST + * This parses DNS and NTP server addresses from the reply. + */ +static void +dhcp6_handle_config_reply(struct netif *netif, struct pbuf *p_msg_in) +{ + struct dhcp6 *dhcp6 = netif_dhcp6_data(netif); + + LWIP_UNUSED_ARG(dhcp6); + LWIP_UNUSED_ARG(p_msg_in); + +#if LWIP_DHCP6_PROVIDE_DNS_SERVERS + if (dhcp6_option_given(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER)) { + ip_addr_t dns_addr; + ip6_addr_t *dns_addr6; + u16_t op_start = dhcp6_get_option_start(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER); + u16_t op_len = dhcp6_get_option_length(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER); + u16_t idx; + u8_t n; + + ip_addr_set_zero_ip6(&dns_addr); + dns_addr6 = ip_2_ip6(&dns_addr); + for (n = 0, idx = op_start; (idx < op_start + op_len) && (n < LWIP_DHCP6_PROVIDE_DNS_SERVERS); + n++, idx += sizeof(struct ip6_addr_packed)) { + u16_t copied = pbuf_copy_partial(p_msg_in, dns_addr6, sizeof(struct ip6_addr_packed), idx); + if (copied != sizeof(struct ip6_addr_packed)) { + /* pbuf length mismatch */ + return; + } + ip6_addr_assign_zone(dns_addr6, IP6_UNKNOWN, netif); + /* @todo: do we need a different offset than DHCP(v4)? */ + dns_setserver(n, &dns_addr); + } + } + /* @ todo: parse and set Domain Search List */ +#endif /* LWIP_DHCP6_PROVIDE_DNS_SERVERS */ + +#if LWIP_DHCP6_GET_NTP_SRV + if (dhcp6_option_given(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER)) { + ip_addr_t ntp_server_addrs[LWIP_DHCP6_MAX_NTP_SERVERS]; + u16_t op_start = dhcp6_get_option_start(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER); + u16_t op_len = dhcp6_get_option_length(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER); + u16_t idx; + u8_t n; + + for (n = 0, idx = op_start; (idx < op_start + op_len) && (n < LWIP_DHCP6_MAX_NTP_SERVERS); + n++, idx += sizeof(struct ip6_addr_packed)) { + u16_t copied; + ip6_addr_t *ntp_addr6 = ip_2_ip6(&ntp_server_addrs[n]); + ip_addr_set_zero_ip6(&ntp_server_addrs[n]); + copied = pbuf_copy_partial(p_msg_in, ntp_addr6, sizeof(struct ip6_addr_packed), idx); + if (copied != sizeof(struct ip6_addr_packed)) { + /* pbuf length mismatch */ + return; + } + ip6_addr_assign_zone(ntp_addr6, IP6_UNKNOWN, netif); + } + dhcp6_set_ntp_servers(n, ntp_server_addrs); + } +#endif /* LWIP_DHCP6_GET_NTP_SRV */ +} +#endif /* LWIP_IPV6_DHCP6_STATELESS */ + +/** This function is called from nd6 module when an RA message is received + * It triggers DHCPv6 requests (if enabled). + */ +void +dhcp6_nd6_ra_trigger(struct netif *netif, u8_t managed_addr_config, u8_t other_config) +{ + struct dhcp6 *dhcp6; + + LWIP_ASSERT("netif != NULL", netif != NULL); + dhcp6 = netif_dhcp6_data(netif); + + LWIP_UNUSED_ARG(managed_addr_config); + LWIP_UNUSED_ARG(other_config); + LWIP_UNUSED_ARG(dhcp6); + +#if LWIP_IPV6_DHCP6_STATELESS + if (dhcp6 != NULL) { + if (dhcp6_stateless_enabled(dhcp6)) { + if (other_config) { + dhcp6_request_config(netif, dhcp6); + } else { + dhcp6_abort_config_request(dhcp6); + } + } + } +#endif /* LWIP_IPV6_DHCP6_STATELESS */ +} + +/** + * Parse the DHCPv6 message and extract the DHCPv6 options. + * + * Extract the DHCPv6 options (offset + length) so that we can later easily + * check for them or extract the contents. + */ +static err_t +dhcp6_parse_reply(struct pbuf *p, struct dhcp6 *dhcp6) +{ + u16_t offset; + u16_t offset_max; + u16_t options_idx; + struct dhcp6_msg *msg_in; + + LWIP_UNUSED_ARG(dhcp6); + + /* clear received options */ + dhcp6_clear_all_options(dhcp6); + msg_in = (struct dhcp6_msg *)p->payload; + + /* parse options */ + + options_idx = sizeof(struct dhcp6_msg); + /* parse options to the end of the received packet */ + offset_max = p->tot_len; + + offset = options_idx; + /* at least 4 byte to read? */ + while ((offset + 4 <= offset_max)) { + u8_t op_len_buf[4]; + u8_t *op_len; + u16_t op; + u16_t len; + u16_t val_offset = (u16_t)(offset + 4); + if (val_offset < offset) { + /* overflow */ + return ERR_BUF; + } + /* copy option + length, might be split across pbufs */ + op_len = (u8_t *)pbuf_get_contiguous(p, op_len_buf, 4, 4, offset); + if (op_len == NULL) { + /* failed to get option and length */ + return ERR_VAL; + } + op = (op_len[0] << 8) | op_len[1]; + len = (op_len[2] << 8) | op_len[3]; + offset = val_offset + len; + if (offset < val_offset) { + /* overflow */ + return ERR_BUF; + } + + switch (op) { + case (DHCP6_OPTION_CLIENTID): + dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_CLI_ID); + dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_CLI_ID, val_offset, len); + break; + case (DHCP6_OPTION_SERVERID): + dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_SERVER_ID); + dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_SERVER_ID, val_offset, len); + break; +#if LWIP_DHCP6_PROVIDE_DNS_SERVERS + case (DHCP6_OPTION_DNS_SERVERS): + dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER); + dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER, val_offset, len); + break; + case (DHCP6_OPTION_DOMAIN_LIST): + dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_DOMAIN_LIST); + dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_DOMAIN_LIST, val_offset, len); + break; +#endif /* LWIP_DHCP6_PROVIDE_DNS_SERVERS */ +#if LWIP_DHCP6_GET_NTP_SRV + case (DHCP6_OPTION_SNTP_SERVERS): + dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER); + dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER, val_offset, len); + break; +#endif /* LWIP_DHCP6_GET_NTP_SRV*/ + default: + LWIP_DEBUGF(DHCP6_DEBUG, ("skipping option %"U16_F" in options\n", op)); + LWIP_HOOK_DHCP6_PARSE_OPTION(ip_current_netif(), dhcp6, dhcp6->state, msg_in, + msg_in->msgtype, op, len, q, val_offset); + break; + } + } + return ERR_OK; +} + +static void +dhcp6_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) +{ + struct netif *netif = ip_current_input_netif(); + struct dhcp6 *dhcp6 = netif_dhcp6_data(netif); + struct dhcp6_msg *reply_msg = (struct dhcp6_msg *)p->payload; + u8_t msg_type; + u32_t xid; + + LWIP_UNUSED_ARG(arg); + + /* Caught DHCPv6 message from netif that does not have DHCPv6 enabled? -> not interested */ + if ((dhcp6 == NULL) || (dhcp6->pcb_allocated == 0)) { + goto free_pbuf_and_return; + } + + LWIP_ERROR("invalid server address type", IP_IS_V6(addr), goto free_pbuf_and_return;); + + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_recv(pbuf = %p) from DHCPv6 server %s port %"U16_F"\n", (void *)p, + ipaddr_ntoa(addr), port)); + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("pbuf->len = %"U16_F"\n", p->len)); + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("pbuf->tot_len = %"U16_F"\n", p->tot_len)); + /* prevent warnings about unused arguments */ + LWIP_UNUSED_ARG(pcb); + LWIP_UNUSED_ARG(addr); + LWIP_UNUSED_ARG(port); + + if (p->len < sizeof(struct dhcp6_msg)) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("DHCPv6 reply message or pbuf too short\n")); + goto free_pbuf_and_return; + } + + /* match transaction ID against what we expected */ + xid = reply_msg->transaction_id[0] << 16; + xid |= reply_msg->transaction_id[1] << 8; + xid |= reply_msg->transaction_id[2]; + if (xid != dhcp6->xid) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, + ("transaction id mismatch reply_msg->xid(%"X32_F")!= dhcp6->xid(%"X32_F")\n", xid, dhcp6->xid)); + goto free_pbuf_and_return; + } + /* option fields could be unfold? */ + if (dhcp6_parse_reply(p, dhcp6) != ERR_OK) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, + ("problem unfolding DHCPv6 message - too short on memory?\n")); + goto free_pbuf_and_return; + } + + /* read DHCP message type */ + msg_type = reply_msg->msgtype; + /* message type is DHCP6 REPLY? */ + if (msg_type == DHCP6_REPLY) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("DHCP6_REPLY received\n")); +#if LWIP_IPV6_DHCP6_STATELESS + /* in info-requesting state? */ + if (dhcp6->state == DHCP6_STATE_REQUESTING_CONFIG) { + dhcp6_set_state(dhcp6, DHCP6_STATE_STATELESS_IDLE, "dhcp6_recv"); + dhcp6_handle_config_reply(netif, p); + } else +#endif /* LWIP_IPV6_DHCP6_STATELESS */ + { + /* @todo: handle reply in other states? */ + } + } else { + /* @todo: handle other message types */ + } + +free_pbuf_and_return: + pbuf_free(p); +} + +/** + * A DHCPv6 request has timed out. + * + * The timer that was started with the DHCPv6 request has + * timed out, indicating no response was received in time. + */ +static void +dhcp6_timeout(struct netif *netif, struct dhcp6 *dhcp6) +{ + LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp6_timeout()\n")); + + LWIP_UNUSED_ARG(netif); + LWIP_UNUSED_ARG(dhcp6); + +#if LWIP_IPV6_DHCP6_STATELESS + /* back-off period has passed, or server selection timed out */ + if (dhcp6->state == DHCP6_STATE_REQUESTING_CONFIG) { + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_timeout(): retrying information request\n")); + dhcp6_information_request(netif, dhcp6); + } +#endif /* LWIP_IPV6_DHCP6_STATELESS */ +} + +/** + * DHCPv6 timeout handling (this function must be called every 500ms, + * see @ref DHCP6_TIMER_MSECS). + * + * A DHCPv6 server is expected to respond within a short period of time. + * This timer checks whether an outstanding DHCPv6 request is timed out. + */ +void +dhcp6_tmr(void) +{ + struct netif *netif; + /* loop through netif's */ + NETIF_FOREACH(netif) { + struct dhcp6 *dhcp6 = netif_dhcp6_data(netif); + /* only act on DHCPv6 configured interfaces */ + if (dhcp6 != NULL) { + /* timer is active (non zero), and is about to trigger now */ + if (dhcp6->request_timeout > 1) { + dhcp6->request_timeout--; + } else if (dhcp6->request_timeout == 1) { + dhcp6->request_timeout--; + /* { dhcp6->request_timeout == 0 } */ + LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_tmr(): request timeout\n")); + /* this client's request timeout triggered */ + dhcp6_timeout(netif, dhcp6); + } + } + } +} + +#endif /* LWIP_IPV6 && LWIP_IPV6_DHCP6 */ diff --git a/lib/lwip/core/ipv6/ethip6.c b/lib/lwip/core/ipv6/ethip6.c new file mode 100644 index 0000000000..fec8b28a9d --- /dev/null +++ b/lib/lwip/core/ipv6/ethip6.c @@ -0,0 +1,123 @@ +/** + * @file + * + * Ethernet output for IPv6. Uses ND tables for link-layer addressing. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#include "lwip/opt.h" + +#if LWIP_IPV6 && LWIP_ETHERNET + +#include "lwip/ethip6.h" +#include "lwip/nd6.h" +#include "lwip/pbuf.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/inet_chksum.h" +#include "lwip/netif.h" +#include "lwip/icmp6.h" +#include "lwip/prot/ethernet.h" +#include "netif/ethernet.h" + +#include <string.h> + +/** + * Resolve and fill-in Ethernet address header for outgoing IPv6 packet. + * + * For IPv6 multicast, corresponding Ethernet addresses + * are selected and the packet is transmitted on the link. + * + * For unicast addresses, ask the ND6 module what to do. It will either let us + * send the the packet right away, or queue the packet for later itself, unless + * an error occurs. + * + * @todo anycast addresses + * + * @param netif The lwIP network interface which the IP packet will be sent on. + * @param q The pbuf(s) containing the IP packet to be sent. + * @param ip6addr The IP address of the packet destination. + * + * @return + * - ERR_OK or the return value of @ref nd6_get_next_hop_addr_or_queue. + */ +err_t +ethip6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr) +{ + struct eth_addr dest; + const u8_t *hwaddr; + err_t result; + + LWIP_ASSERT_CORE_LOCKED(); + + /* The destination IP address must be properly zoned from here on down. */ + IP6_ADDR_ZONECHECK_NETIF(ip6addr, netif); + + /* multicast destination IP address? */ + if (ip6_addr_ismulticast(ip6addr)) { + /* Hash IP multicast address to MAC address.*/ + dest.addr[0] = 0x33; + dest.addr[1] = 0x33; + dest.addr[2] = ((const u8_t *)(&(ip6addr->addr[3])))[0]; + dest.addr[3] = ((const u8_t *)(&(ip6addr->addr[3])))[1]; + dest.addr[4] = ((const u8_t *)(&(ip6addr->addr[3])))[2]; + dest.addr[5] = ((const u8_t *)(&(ip6addr->addr[3])))[3]; + + /* Send out. */ + return ethernet_output(netif, q, (const struct eth_addr*)(netif->hwaddr), &dest, ETHTYPE_IPV6); + } + + /* We have a unicast destination IP address */ + /* @todo anycast? */ + + /* Ask ND6 what to do with the packet. */ + result = nd6_get_next_hop_addr_or_queue(netif, q, ip6addr, &hwaddr); + if (result != ERR_OK) { + return result; + } + + /* If no hardware address is returned, nd6 has queued the packet for later. */ + if (hwaddr == NULL) { + return ERR_OK; + } + + /* Send out the packet using the returned hardware address. */ + SMEMCPY(dest.addr, hwaddr, 6); + return ethernet_output(netif, q, (const struct eth_addr*)(netif->hwaddr), &dest, ETHTYPE_IPV6); +} + +#endif /* LWIP_IPV6 && LWIP_ETHERNET */ diff --git a/lib/lwip/core/ipv6/icmp6.c b/lib/lwip/core/ipv6/icmp6.c new file mode 100644 index 0000000000..ed0bd7b748 --- /dev/null +++ b/lib/lwip/core/ipv6/icmp6.c @@ -0,0 +1,425 @@ +/** + * @file + * + * IPv6 version of ICMP, as per RFC 4443. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#include "lwip/opt.h" + +#if LWIP_ICMP6 && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/icmp6.h" +#include "lwip/prot/icmp6.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/inet_chksum.h" +#include "lwip/pbuf.h" +#include "lwip/netif.h" +#include "lwip/nd6.h" +#include "lwip/mld6.h" +#include "lwip/ip.h" +#include "lwip/stats.h" + +#include <string.h> + +#if !LWIP_ICMP6_DATASIZE || (LWIP_ICMP6_DATASIZE > (IP6_MIN_MTU_LENGTH - IP6_HLEN - ICMP6_HLEN)) +#undef LWIP_ICMP6_DATASIZE +#define LWIP_ICMP6_DATASIZE (IP6_MIN_MTU_LENGTH - IP6_HLEN - ICMP6_HLEN) +#endif + +/* Forward declarations */ +static void icmp6_send_response(struct pbuf *p, u8_t code, u32_t data, u8_t type); +static void icmp6_send_response_with_addrs(struct pbuf *p, u8_t code, u32_t data, + u8_t type, const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr); +static void icmp6_send_response_with_addrs_and_netif(struct pbuf *p, u8_t code, u32_t data, + u8_t type, const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr, struct netif *netif); + + +/** + * Process an input ICMPv6 message. Called by ip6_input. + * + * Will generate a reply for echo requests. Other messages are forwarded + * to nd6_input, or mld6_input. + * + * @param p the mld packet, p->payload pointing to the icmpv6 header + * @param inp the netif on which this packet was received + */ +void +icmp6_input(struct pbuf *p, struct netif *inp) +{ + struct icmp6_hdr *icmp6hdr; + struct pbuf *r; + const ip6_addr_t *reply_src; + + ICMP6_STATS_INC(icmp6.recv); + + /* Check that ICMPv6 header fits in payload */ + if (p->len < sizeof(struct icmp6_hdr)) { + /* drop short packets */ + pbuf_free(p); + ICMP6_STATS_INC(icmp6.lenerr); + ICMP6_STATS_INC(icmp6.drop); + return; + } + + icmp6hdr = (struct icmp6_hdr *)p->payload; + +#if CHECKSUM_CHECK_ICMP6 + IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_CHECK_ICMP6) { + if (ip6_chksum_pseudo(p, IP6_NEXTH_ICMP6, p->tot_len, ip6_current_src_addr(), + ip6_current_dest_addr()) != 0) { + /* Checksum failed */ + pbuf_free(p); + ICMP6_STATS_INC(icmp6.chkerr); + ICMP6_STATS_INC(icmp6.drop); + return; + } + } +#endif /* CHECKSUM_CHECK_ICMP6 */ + + switch (icmp6hdr->type) { + case ICMP6_TYPE_NA: /* Neighbor advertisement */ + case ICMP6_TYPE_NS: /* Neighbor solicitation */ + case ICMP6_TYPE_RA: /* Router advertisement */ + case ICMP6_TYPE_RD: /* Redirect */ + case ICMP6_TYPE_PTB: /* Packet too big */ + nd6_input(p, inp); + return; + case ICMP6_TYPE_RS: +#if LWIP_IPV6_FORWARD + /* @todo implement router functionality */ +#endif + break; +#if LWIP_IPV6_MLD + case ICMP6_TYPE_MLQ: + case ICMP6_TYPE_MLR: + case ICMP6_TYPE_MLD: + mld6_input(p, inp); + return; +#endif + case ICMP6_TYPE_EREQ: +#if !LWIP_MULTICAST_PING + /* multicast destination address? */ + if (ip6_addr_ismulticast(ip6_current_dest_addr())) { + /* drop */ + pbuf_free(p); + ICMP6_STATS_INC(icmp6.drop); + return; + } +#endif /* LWIP_MULTICAST_PING */ + + /* Allocate reply. */ + r = pbuf_alloc(PBUF_IP, p->tot_len, PBUF_RAM); + if (r == NULL) { + /* drop */ + pbuf_free(p); + ICMP6_STATS_INC(icmp6.memerr); + return; + } + + /* Copy echo request. */ + if (pbuf_copy(r, p) != ERR_OK) { + /* drop */ + pbuf_free(p); + pbuf_free(r); + ICMP6_STATS_INC(icmp6.err); + return; + } + + /* Determine reply source IPv6 address. */ +#if LWIP_MULTICAST_PING + if (ip6_addr_ismulticast(ip6_current_dest_addr())) { + reply_src = ip_2_ip6(ip6_select_source_address(inp, ip6_current_src_addr())); + if (reply_src == NULL) { + /* drop */ + pbuf_free(p); + pbuf_free(r); + ICMP6_STATS_INC(icmp6.rterr); + return; + } + } + else +#endif /* LWIP_MULTICAST_PING */ + { + reply_src = ip6_current_dest_addr(); + } + + /* Set fields in reply. */ + ((struct icmp6_echo_hdr *)(r->payload))->type = ICMP6_TYPE_EREP; + ((struct icmp6_echo_hdr *)(r->payload))->chksum = 0; +#if CHECKSUM_GEN_ICMP6 + IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_ICMP6) { + ((struct icmp6_echo_hdr *)(r->payload))->chksum = ip6_chksum_pseudo(r, + IP6_NEXTH_ICMP6, r->tot_len, reply_src, ip6_current_src_addr()); + } +#endif /* CHECKSUM_GEN_ICMP6 */ + + /* Send reply. */ + ICMP6_STATS_INC(icmp6.xmit); + ip6_output_if(r, reply_src, ip6_current_src_addr(), + LWIP_ICMP6_HL, 0, IP6_NEXTH_ICMP6, inp); + pbuf_free(r); + + break; + default: + ICMP6_STATS_INC(icmp6.proterr); + ICMP6_STATS_INC(icmp6.drop); + break; + } + + pbuf_free(p); +} + + +/** + * Send an icmpv6 'destination unreachable' packet. + * + * This function must be used only in direct response to a packet that is being + * received right now. Otherwise, address zones would be lost. + * + * @param p the input packet for which the 'unreachable' should be sent, + * p->payload pointing to the IPv6 header + * @param c ICMPv6 code for the unreachable type + */ +void +icmp6_dest_unreach(struct pbuf *p, enum icmp6_dur_code c) +{ + icmp6_send_response(p, c, 0, ICMP6_TYPE_DUR); +} + +/** + * Send an icmpv6 'packet too big' packet. + * + * This function must be used only in direct response to a packet that is being + * received right now. Otherwise, address zones would be lost. + * + * @param p the input packet for which the 'packet too big' should be sent, + * p->payload pointing to the IPv6 header + * @param mtu the maximum mtu that we can accept + */ +void +icmp6_packet_too_big(struct pbuf *p, u32_t mtu) +{ + icmp6_send_response(p, 0, mtu, ICMP6_TYPE_PTB); +} + +/** + * Send an icmpv6 'time exceeded' packet. + * + * This function must be used only in direct response to a packet that is being + * received right now. Otherwise, address zones would be lost. + * + * @param p the input packet for which the 'time exceeded' should be sent, + * p->payload pointing to the IPv6 header + * @param c ICMPv6 code for the time exceeded type + */ +void +icmp6_time_exceeded(struct pbuf *p, enum icmp6_te_code c) +{ + icmp6_send_response(p, c, 0, ICMP6_TYPE_TE); +} + +/** + * Send an icmpv6 'time exceeded' packet, with explicit source and destination + * addresses. + * + * This function may be used to send a response sometime after receiving the + * packet for which this response is meant. The provided source and destination + * addresses are used primarily to retain their zone information. + * + * @param p the input packet for which the 'time exceeded' should be sent, + * p->payload pointing to the IPv6 header + * @param c ICMPv6 code for the time exceeded type + * @param src_addr source address of the original packet, with zone information + * @param dest_addr destination address of the original packet, with zone + * information + */ +void +icmp6_time_exceeded_with_addrs(struct pbuf *p, enum icmp6_te_code c, + const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr) +{ + icmp6_send_response_with_addrs(p, c, 0, ICMP6_TYPE_TE, src_addr, dest_addr); +} + +/** + * Send an icmpv6 'parameter problem' packet. + * + * This function must be used only in direct response to a packet that is being + * received right now. Otherwise, address zones would be lost and the calculated + * offset would be wrong (calculated against ip6_current_header()). + * + * @param p the input packet for which the 'param problem' should be sent, + * p->payload pointing to the IP header + * @param c ICMPv6 code for the param problem type + * @param pointer the pointer to the byte where the parameter is found + */ +void +icmp6_param_problem(struct pbuf *p, enum icmp6_pp_code c, const void *pointer) +{ + u32_t pointer_u32 = (u32_t)((const u8_t *)pointer - (const u8_t *)ip6_current_header()); + icmp6_send_response(p, c, pointer_u32, ICMP6_TYPE_PP); +} + +/** + * Send an ICMPv6 packet in response to an incoming packet. + * The packet is sent *to* ip_current_src_addr() on ip_current_netif(). + * + * @param p the input packet for which the response should be sent, + * p->payload pointing to the IPv6 header + * @param code Code of the ICMPv6 header + * @param data Additional 32-bit parameter in the ICMPv6 header + * @param type Type of the ICMPv6 header + */ +static void +icmp6_send_response(struct pbuf *p, u8_t code, u32_t data, u8_t type) +{ + const struct ip6_addr *reply_src, *reply_dest; + struct netif *netif = ip_current_netif(); + + LWIP_ASSERT("icmpv6 packet not a direct response", netif != NULL); + reply_dest = ip6_current_src_addr(); + + /* Select an address to use as source. */ + reply_src = ip_2_ip6(ip6_select_source_address(netif, reply_dest)); + if (reply_src == NULL) { + ICMP6_STATS_INC(icmp6.rterr); + return; + } + icmp6_send_response_with_addrs_and_netif(p, code, data, type, reply_src, reply_dest, netif); +} + +/** + * Send an ICMPv6 packet in response to an incoming packet. + * + * Call this function if the packet is NOT sent as a direct response to an + * incoming packet, but rather sometime later (e.g. for a fragment reassembly + * timeout). The caller must provide the zoned source and destination addresses + * from the original packet with the src_addr and dest_addr parameters. The + * reason for this approach is that while the addresses themselves are part of + * the original packet, their zone information is not, thus possibly resulting + * in a link-local response being sent over the wrong link. + * + * @param p the input packet for which the response should be sent, + * p->payload pointing to the IPv6 header + * @param code Code of the ICMPv6 header + * @param data Additional 32-bit parameter in the ICMPv6 header + * @param type Type of the ICMPv6 header + * @param src_addr original source address + * @param dest_addr original destination address + */ +static void +icmp6_send_response_with_addrs(struct pbuf *p, u8_t code, u32_t data, u8_t type, + const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr) +{ + const struct ip6_addr *reply_src, *reply_dest; + struct netif *netif; + + /* Get the destination address and netif for this ICMP message. */ + LWIP_ASSERT("must provide both source and destination", src_addr != NULL); + LWIP_ASSERT("must provide both source and destination", dest_addr != NULL); + + /* Special case, as ip6_current_xxx is either NULL, or points + to a different packet than the one that expired. */ + IP6_ADDR_ZONECHECK(src_addr); + IP6_ADDR_ZONECHECK(dest_addr); + /* Swap source and destination for the reply. */ + reply_dest = src_addr; + reply_src = dest_addr; + netif = ip6_route(reply_src, reply_dest); + if (netif == NULL) { + ICMP6_STATS_INC(icmp6.rterr); + return; + } + icmp6_send_response_with_addrs_and_netif(p, code, data, type, reply_src, + reply_dest, netif); +} + +/** + * Send an ICMPv6 packet (with srd/dst address and netif given). + * + * @param p the input packet for which the response should be sent, + * p->payload pointing to the IPv6 header + * @param code Code of the ICMPv6 header + * @param data Additional 32-bit parameter in the ICMPv6 header + * @param type Type of the ICMPv6 header + * @param reply_src source address of the packet to send + * @param reply_dest destination address of the packet to send + * @param netif netif to send the packet + */ +static void +icmp6_send_response_with_addrs_and_netif(struct pbuf *p, u8_t code, u32_t data, u8_t type, + const ip6_addr_t *reply_src, const ip6_addr_t *reply_dest, struct netif *netif) +{ + struct pbuf *q; + struct icmp6_hdr *icmp6hdr; + u16_t datalen = LWIP_MIN(p->tot_len, LWIP_ICMP6_DATASIZE); + + /* ICMPv6 header + datalen (as much of the offending packet as possible) */ + q = pbuf_alloc(PBUF_IP, sizeof(struct icmp6_hdr) + datalen, + PBUF_RAM); + if (q == NULL) { + LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded: failed to allocate pbuf for ICMPv6 packet.\n")); + ICMP6_STATS_INC(icmp6.memerr); + return; + } + LWIP_ASSERT("check that first pbuf can hold icmp6 header", + (q->len >= (sizeof(struct icmp6_hdr)))); + + icmp6hdr = (struct icmp6_hdr *)q->payload; + icmp6hdr->type = type; + icmp6hdr->code = code; + icmp6hdr->data = lwip_htonl(data); + + /* copy fields from original packet */ + pbuf_copy_partial_pbuf(q, p, datalen, sizeof(struct icmp6_hdr)); + + /* calculate checksum */ + icmp6hdr->chksum = 0; +#if CHECKSUM_GEN_ICMP6 + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP6) { + icmp6hdr->chksum = ip6_chksum_pseudo(q, IP6_NEXTH_ICMP6, q->tot_len, + reply_src, reply_dest); + } +#endif /* CHECKSUM_GEN_ICMP6 */ + + ICMP6_STATS_INC(icmp6.xmit); + ip6_output_if(q, reply_src, reply_dest, LWIP_ICMP6_HL, 0, IP6_NEXTH_ICMP6, netif); + pbuf_free(q); +} + +#endif /* LWIP_ICMP6 && LWIP_IPV6 */ diff --git a/lib/lwip/core/ipv6/inet6.c b/lib/lwip/core/ipv6/inet6.c new file mode 100644 index 0000000000..d9a992c22a --- /dev/null +++ b/lib/lwip/core/ipv6/inet6.c @@ -0,0 +1,53 @@ +/** + * @file + * + * INET v6 addresses. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#include "lwip/opt.h" + +#if LWIP_IPV6 && LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/def.h" +#include "lwip/inet.h" + +/** This variable is initialized by the system to contain the wildcard IPv6 address. + */ +const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; + +#endif /* LWIP_IPV6 */ diff --git a/lib/lwip/core/ipv6/ip6.c b/lib/lwip/core/ipv6/ip6.c new file mode 100644 index 0000000000..90e90dda45 --- /dev/null +++ b/lib/lwip/core/ipv6/ip6.c @@ -0,0 +1,1494 @@ +/** + * @file + * + * IPv6 layer. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#include "lwip/opt.h" + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/netif.h" +#include "lwip/ip.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/ip6_frag.h" +#include "lwip/icmp6.h" +#include "lwip/priv/raw_priv.h" +#include "lwip/udp.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/dhcp6.h" +#include "lwip/nd6.h" +#include "lwip/mld6.h" +#include "lwip/debug.h" +#include "lwip/stats.h" + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +/** + * Finds the appropriate network interface for a given IPv6 address. It tries to select + * a netif following a sequence of heuristics: + * 1) if there is only 1 netif, return it + * 2) if the destination is a zoned address, match its zone to a netif + * 3) if the either the source or destination address is a scoped address, + * match the source address's zone (if set) or address (if not) to a netif + * 4) tries to match the destination subnet to a configured address + * 5) tries to find a router-announced route + * 6) tries to match the (unscoped) source address to the netif + * 7) returns the default netif, if configured + * + * Note that each of the two given addresses may or may not be properly zoned. + * + * @param src the source IPv6 address, if known + * @param dest the destination IPv6 address for which to find the route + * @return the netif on which to send to reach dest + */ +struct netif * +ip6_route(const ip6_addr_t *src, const ip6_addr_t *dest) +{ +#if LWIP_SINGLE_NETIF + LWIP_UNUSED_ARG(src); + LWIP_UNUSED_ARG(dest); +#else /* LWIP_SINGLE_NETIF */ + struct netif *netif; + s8_t i; + + LWIP_ASSERT_CORE_LOCKED(); + + /* If single netif configuration, fast return. */ + if ((netif_list != NULL) && (netif_list->next == NULL)) { + if (!netif_is_up(netif_list) || !netif_is_link_up(netif_list) || + (ip6_addr_has_zone(dest) && !ip6_addr_test_zone(dest, netif_list))) { + return NULL; + } + return netif_list; + } + +#if LWIP_IPV6_SCOPES + /* Special processing for zoned destination addresses. This includes link- + * local unicast addresses and interface/link-local multicast addresses. Use + * the zone to find a matching netif. If the address is not zoned, then there + * is technically no "wrong" netif to choose, and we leave routing to other + * rules; in most cases this should be the scoped-source rule below. */ + if (ip6_addr_has_zone(dest)) { + IP6_ADDR_ZONECHECK(dest); + /* Find a netif based on the zone. For custom mappings, one zone may map + * to multiple netifs, so find one that can actually send a packet. */ + NETIF_FOREACH(netif) { + if (ip6_addr_test_zone(dest, netif) && + netif_is_up(netif) && netif_is_link_up(netif)) { + return netif; + } + } + /* No matching netif found. Do no try to route to a different netif, + * as that would be a zone violation, resulting in any packets sent to + * that netif being dropped on output. */ + return NULL; + } +#endif /* LWIP_IPV6_SCOPES */ + + /* Special processing for scoped source and destination addresses. If we get + * here, the destination address does not have a zone, so either way we need + * to look at the source address, which may or may not have a zone. If it + * does, the zone is restrictive: there is (typically) only one matching + * netif for it, and we should avoid routing to any other netif as that would + * result in guaranteed zone violations. For scoped source addresses that do + * not have a zone, use (only) a netif that has that source address locally + * assigned. This case also applies to the loopback source address, which has + * an implied link-local scope. If only the destination address is scoped + * (but, again, not zoned), we still want to use only the source address to + * determine its zone because that's most likely what the user/application + * wants, regardless of whether the source address is scoped. Finally, some + * of this story also applies if scoping is disabled altogether. */ +#if LWIP_IPV6_SCOPES + if (ip6_addr_has_scope(dest, IP6_UNKNOWN) || + ip6_addr_has_scope(src, IP6_UNICAST) || +#else /* LWIP_IPV6_SCOPES */ + if (ip6_addr_islinklocal(dest) || ip6_addr_ismulticast_iflocal(dest) || + ip6_addr_ismulticast_linklocal(dest) || ip6_addr_islinklocal(src) || +#endif /* LWIP_IPV6_SCOPES */ + ip6_addr_isloopback(src)) { +#if LWIP_IPV6_SCOPES + if (ip6_addr_has_zone(src)) { + /* Find a netif matching the source zone (relatively cheap). */ + NETIF_FOREACH(netif) { + if (netif_is_up(netif) && netif_is_link_up(netif) && + ip6_addr_test_zone(src, netif)) { + return netif; + } + } + } else +#endif /* LWIP_IPV6_SCOPES */ + { + /* Find a netif matching the source address (relatively expensive). */ + NETIF_FOREACH(netif) { + if (!netif_is_up(netif) || !netif_is_link_up(netif)) { + continue; + } + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) && + ip6_addr_zoneless_eq(src, netif_ip6_addr(netif, i))) { + return netif; + } + } + } + } + /* Again, do not use any other netif in this case, as that could result in + * zone boundary violations. */ + return NULL; + } + + /* We come here only if neither source nor destination is scoped. */ + IP6_ADDR_ZONECHECK(src); + +#ifdef LWIP_HOOK_IP6_ROUTE + netif = LWIP_HOOK_IP6_ROUTE(src, dest); + if (netif != NULL) { + return netif; + } +#endif + + /* See if the destination subnet matches a configured address. In accordance + * with RFC 5942, dynamically configured addresses do not have an implied + * local subnet, and thus should be considered /128 assignments. However, as + * such, the destination address may still match a local address, and so we + * still need to check for exact matches here. By (lwIP) policy, statically + * configured addresses do always have an implied local /64 subnet. */ + NETIF_FOREACH(netif) { + if (!netif_is_up(netif) || !netif_is_link_up(netif)) { + continue; + } + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) && + ip6_addr_net_eq(dest, netif_ip6_addr(netif, i)) && + (netif_ip6_addr_isstatic(netif, i) || + ip6_addr_nethost_eq(dest, netif_ip6_addr(netif, i)))) { + return netif; + } + } + } + + /* Get the netif for a suitable router-announced route. */ + netif = nd6_find_route(dest); + if (netif != NULL) { + return netif; + } + + /* Try with the netif that matches the source address. Given the earlier rule + * for scoped source addresses, this applies to unscoped addresses only. */ + if (!ip6_addr_isany(src)) { + NETIF_FOREACH(netif) { + if (!netif_is_up(netif) || !netif_is_link_up(netif)) { + continue; + } + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) && + ip6_addr_eq(src, netif_ip6_addr(netif, i))) { + return netif; + } + } + } + } + +#if LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF + /* loopif is disabled, loopback traffic is passed through any netif */ + if (ip6_addr_isloopback(dest)) { + /* don't check for link on loopback traffic */ + if (netif_default != NULL && netif_is_up(netif_default)) { + return netif_default; + } + /* default netif is not up, just use any netif for loopback traffic */ + NETIF_FOREACH(netif) { + if (netif_is_up(netif)) { + return netif; + } + } + return NULL; + } +#endif /* LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF */ +#endif /* !LWIP_SINGLE_NETIF */ + + /* no matching netif found, use default netif, if up */ + if ((netif_default == NULL) || !netif_is_up(netif_default) || !netif_is_link_up(netif_default)) { + return NULL; + } + return netif_default; +} + +/** + * @ingroup ip6 + * Select the best IPv6 source address for a given destination IPv6 address. + * + * This implementation follows RFC 6724 Sec. 5 to the following extent: + * - Rules 1, 2, 3: fully implemented + * - Rules 4, 5, 5.5: not applicable + * - Rule 6: not implemented + * - Rule 7: not applicable + * - Rule 8: limited to "prefer /64 subnet match over non-match" + * + * For Rule 2, we deliberately deviate from RFC 6724 Sec. 3.1 by considering + * ULAs to be of smaller scope than global addresses, to avoid that a preferred + * ULA is picked over a deprecated global address when given a global address + * as destination, as that would likely result in broken two-way communication. + * + * As long as temporary addresses are not supported (as used in Rule 7), a + * proper implementation of Rule 8 would obviate the need to implement Rule 6. + * + * @param netif the netif on which to send a packet + * @param dest the destination we are trying to reach (possibly not properly + * zoned) + * @return the most suitable source address to use, or NULL if no suitable + * source address is found + */ +const ip_addr_t * +ip6_select_source_address(struct netif *netif, const ip6_addr_t *dest) +{ + const ip_addr_t *best_addr; + const ip6_addr_t *cand_addr; + s8_t dest_scope, cand_scope; + s8_t best_scope = IP6_MULTICAST_SCOPE_RESERVED; + u8_t i, cand_pref, cand_bits; + u8_t best_pref = 0; + u8_t best_bits = 0; + + /* Start by determining the scope of the given destination address. These + * tests are hopefully (roughly) in order of likeliness to match. */ + if (ip6_addr_isglobal(dest)) { + dest_scope = IP6_MULTICAST_SCOPE_GLOBAL; + } else if (ip6_addr_islinklocal(dest) || ip6_addr_isloopback(dest)) { + dest_scope = IP6_MULTICAST_SCOPE_LINK_LOCAL; + } else if (ip6_addr_isuniquelocal(dest)) { + dest_scope = IP6_MULTICAST_SCOPE_ORGANIZATION_LOCAL; + } else if (ip6_addr_ismulticast(dest)) { + dest_scope = ip6_addr_multicast_scope(dest); + } else if (ip6_addr_issitelocal(dest)) { + dest_scope = IP6_MULTICAST_SCOPE_SITE_LOCAL; + } else { + /* no match, consider scope global */ + dest_scope = IP6_MULTICAST_SCOPE_GLOBAL; + } + + best_addr = NULL; + + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + /* Consider only valid (= preferred and deprecated) addresses. */ + if (!ip6_addr_isvalid(netif_ip6_addr_state(netif, i))) { + continue; + } + /* Determine the scope of this candidate address. Same ordering idea. */ + cand_addr = netif_ip6_addr(netif, i); + if (ip6_addr_isglobal(cand_addr)) { + cand_scope = IP6_MULTICAST_SCOPE_GLOBAL; + } else if (ip6_addr_islinklocal(cand_addr)) { + cand_scope = IP6_MULTICAST_SCOPE_LINK_LOCAL; + } else if (ip6_addr_isuniquelocal(cand_addr)) { + cand_scope = IP6_MULTICAST_SCOPE_ORGANIZATION_LOCAL; + } else if (ip6_addr_issitelocal(cand_addr)) { + cand_scope = IP6_MULTICAST_SCOPE_SITE_LOCAL; + } else { + /* no match, treat as low-priority global scope */ + cand_scope = IP6_MULTICAST_SCOPE_RESERVEDF; + } + cand_pref = ip6_addr_ispreferred(netif_ip6_addr_state(netif, i)); + /* @todo compute the actual common bits, for longest matching prefix. */ + /* We cannot count on the destination address having a proper zone + * assignment, so do not compare zones in this case. */ + cand_bits = ip6_addr_net_zoneless_eq(cand_addr, dest); /* just 1 or 0 for now */ + if (cand_bits && ip6_addr_nethost_eq(cand_addr, dest)) { + return netif_ip_addr6(netif, i); /* Rule 1 */ + } + if ((best_addr == NULL) || /* no alternative yet */ + ((cand_scope < best_scope) && (cand_scope >= dest_scope)) || + ((cand_scope > best_scope) && (best_scope < dest_scope)) || /* Rule 2 */ + ((cand_scope == best_scope) && ((cand_pref > best_pref) || /* Rule 3 */ + ((cand_pref == best_pref) && (cand_bits > best_bits))))) { /* Rule 8 */ + /* We found a new "winning" candidate. */ + best_addr = netif_ip_addr6(netif, i); + best_scope = cand_scope; + best_pref = cand_pref; + best_bits = cand_bits; + } + } + + return best_addr; /* may be NULL */ +} + +#if LWIP_IPV6_FORWARD +/** + * Forwards an IPv6 packet. It finds an appropriate route for the + * packet, decrements the HL value of the packet, and outputs + * the packet on the appropriate interface. + * + * @param p the packet to forward (p->payload points to IP header) + * @param iphdr the IPv6 header of the input packet + * @param inp the netif on which this packet was received + */ +static void +ip6_forward(struct pbuf *p, struct ip6_hdr *iphdr, struct netif *inp) +{ + struct netif *netif; + + /* do not forward link-local or loopback addresses */ + if (ip6_addr_islinklocal(ip6_current_dest_addr()) || + ip6_addr_isloopback(ip6_current_dest_addr())) { + LWIP_DEBUGF(IP6_DEBUG, ("ip6_forward: not forwarding link-local address.\n")); + IP6_STATS_INC(ip6.rterr); + IP6_STATS_INC(ip6.drop); + return; + } + + /* Find network interface where to forward this IP packet to. */ + netif = ip6_route(IP6_ADDR_ANY6, ip6_current_dest_addr()); + if (netif == NULL) { + LWIP_DEBUGF(IP6_DEBUG, ("ip6_forward: no route for %"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F"\n", + IP6_ADDR_BLOCK1(ip6_current_dest_addr()), + IP6_ADDR_BLOCK2(ip6_current_dest_addr()), + IP6_ADDR_BLOCK3(ip6_current_dest_addr()), + IP6_ADDR_BLOCK4(ip6_current_dest_addr()), + IP6_ADDR_BLOCK5(ip6_current_dest_addr()), + IP6_ADDR_BLOCK6(ip6_current_dest_addr()), + IP6_ADDR_BLOCK7(ip6_current_dest_addr()), + IP6_ADDR_BLOCK8(ip6_current_dest_addr()))); +#if LWIP_ICMP6 + /* Don't send ICMP messages in response to ICMP messages */ + if (IP6H_NEXTH(iphdr) != IP6_NEXTH_ICMP6) { + icmp6_dest_unreach(p, ICMP6_DUR_NO_ROUTE); + } +#endif /* LWIP_ICMP6 */ + IP6_STATS_INC(ip6.rterr); + IP6_STATS_INC(ip6.drop); + return; + } +#if LWIP_IPV6_SCOPES + /* Do not forward packets with a zoned (e.g., link-local) source address + * outside of their zone. We determined the zone a bit earlier, so we know + * that the address is properly zoned here, so we can safely use has_zone. + * Also skip packets with a loopback source address (link-local implied). */ + if ((ip6_addr_has_zone(ip6_current_src_addr()) && + !ip6_addr_test_zone(ip6_current_src_addr(), netif)) || + ip6_addr_isloopback(ip6_current_src_addr())) { + LWIP_DEBUGF(IP6_DEBUG, ("ip6_forward: not forwarding packet beyond its source address zone.\n")); + IP6_STATS_INC(ip6.rterr); + IP6_STATS_INC(ip6.drop); + return; + } +#endif /* LWIP_IPV6_SCOPES */ + /* Do not forward packets onto the same network interface on which + * they arrived. */ + if (netif == inp) { + LWIP_DEBUGF(IP6_DEBUG, ("ip6_forward: not bouncing packets back on incoming interface.\n")); + IP6_STATS_INC(ip6.rterr); + IP6_STATS_INC(ip6.drop); + return; + } + + /* decrement HL */ + IP6H_HOPLIM_SET(iphdr, IP6H_HOPLIM(iphdr) - 1); + /* send ICMP6 if HL == 0 */ + if (IP6H_HOPLIM(iphdr) == 0) { +#if LWIP_ICMP6 + /* Don't send ICMP messages in response to ICMP messages */ + if (IP6H_NEXTH(iphdr) != IP6_NEXTH_ICMP6) { + icmp6_time_exceeded(p, ICMP6_TE_HL); + } +#endif /* LWIP_ICMP6 */ + IP6_STATS_INC(ip6.drop); + return; + } + + if (netif->mtu && (p->tot_len > netif->mtu)) { +#if LWIP_ICMP6 + /* Don't send ICMP messages in response to ICMP messages */ + if (IP6H_NEXTH(iphdr) != IP6_NEXTH_ICMP6) { + icmp6_packet_too_big(p, netif->mtu); + } +#endif /* LWIP_ICMP6 */ + IP6_STATS_INC(ip6.drop); + return; + } + + LWIP_DEBUGF(IP6_DEBUG, ("ip6_forward: forwarding packet to %"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F"\n", + IP6_ADDR_BLOCK1(ip6_current_dest_addr()), + IP6_ADDR_BLOCK2(ip6_current_dest_addr()), + IP6_ADDR_BLOCK3(ip6_current_dest_addr()), + IP6_ADDR_BLOCK4(ip6_current_dest_addr()), + IP6_ADDR_BLOCK5(ip6_current_dest_addr()), + IP6_ADDR_BLOCK6(ip6_current_dest_addr()), + IP6_ADDR_BLOCK7(ip6_current_dest_addr()), + IP6_ADDR_BLOCK8(ip6_current_dest_addr()))); + + /* transmit pbuf on chosen interface */ + netif->output_ip6(netif, p, ip6_current_dest_addr()); + IP6_STATS_INC(ip6.fw); + IP6_STATS_INC(ip6.xmit); + return; +} +#endif /* LWIP_IPV6_FORWARD */ + +/** Return true if the current input packet should be accepted on this netif */ +static int +ip6_input_accept(struct netif *netif) +{ + /* interface is up? */ + if (netif_is_up(netif)) { + u8_t i; + /* unicast to this interface address? address configured? */ + /* If custom scopes are used, the destination zone will be tested as + * part of the local-address comparison, but we need to test the source + * scope as well (e.g., is this interface on the same link?). */ + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) && + ip6_addr_eq(ip6_current_dest_addr(), netif_ip6_addr(netif, i)) +#if IPV6_CUSTOM_SCOPES + && (!ip6_addr_has_zone(ip6_current_src_addr()) || + ip6_addr_test_zone(ip6_current_src_addr(), netif)) +#endif /* IPV6_CUSTOM_SCOPES */ + ) { + /* accept on this netif */ + return 1; + } + } + } + return 0; +} + +/** + * This function is called by the network interface device driver when + * an IPv6 packet is received. The function does the basic checks of the + * IP header such as packet size being at least larger than the header + * size etc. If the packet was not destined for us, the packet is + * forwarded (using ip6_forward). + * + * Finally, the packet is sent to the upper layer protocol input function. + * + * @param p the received IPv6 packet (p->payload points to IPv6 header) + * @param inp the netif on which this packet was received + * @return ERR_OK if the packet was processed (could return ERR_* if it wasn't + * processed, but currently always returns ERR_OK) + */ +err_t +ip6_input(struct pbuf *p, struct netif *inp) +{ + struct ip6_hdr *ip6hdr; + struct netif *netif; + const u8_t *nexth; + u16_t hlen, hlen_tot; /* the current header length */ +#if 0 /*IP_ACCEPT_LINK_LAYER_ADDRESSING*/ + @todo + int check_ip_src=1; +#endif /* IP_ACCEPT_LINK_LAYER_ADDRESSING */ +#if LWIP_RAW + raw_input_state_t raw_status; +#endif /* LWIP_RAW */ + + LWIP_ASSERT_CORE_LOCKED(); + + IP6_STATS_INC(ip6.recv); + + /* identify the IP header */ + ip6hdr = (struct ip6_hdr *)p->payload; + if (IP6H_V(ip6hdr) != 6) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_WARNING, ("IPv6 packet dropped due to bad version number %"U32_F"\n", + IP6H_V(ip6hdr))); + pbuf_free(p); + IP6_STATS_INC(ip6.err); + IP6_STATS_INC(ip6.drop); + return ERR_OK; + } + +#ifdef LWIP_HOOK_IP6_INPUT + if (LWIP_HOOK_IP6_INPUT(p, inp)) { + /* the packet has been eaten */ + return ERR_OK; + } +#endif + + /* header length exceeds first pbuf length, or ip length exceeds total pbuf length? */ + if ((IP6_HLEN > p->len) || (IP6H_PLEN(ip6hdr) > (p->tot_len - IP6_HLEN))) { + if (IP6_HLEN > p->len) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("IPv6 header (len %"U16_F") does not fit in first pbuf (len %"U16_F"), IP packet dropped.\n", + (u16_t)IP6_HLEN, p->len)); + } + if ((IP6H_PLEN(ip6hdr) + IP6_HLEN) > p->tot_len) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("IPv6 (plen %"U16_F") is longer than pbuf (len %"U16_F"), IP packet dropped.\n", + (u16_t)(IP6H_PLEN(ip6hdr) + IP6_HLEN), p->tot_len)); + } + /* free (drop) packet pbufs */ + pbuf_free(p); + IP6_STATS_INC(ip6.lenerr); + IP6_STATS_INC(ip6.drop); + return ERR_OK; + } + + /* Trim pbuf. This should have been done at the netif layer, + * but we'll do it anyway just to be sure that its done. */ + pbuf_realloc(p, (u16_t)(IP6_HLEN + IP6H_PLEN(ip6hdr))); + + /* copy IP addresses to aligned ip6_addr_t */ + ip_addr_copy_from_ip6_packed(ip_data.current_iphdr_dest, ip6hdr->dest); + ip_addr_copy_from_ip6_packed(ip_data.current_iphdr_src, ip6hdr->src); + + /* Don't accept virtual IPv4 mapped IPv6 addresses. + * Don't accept multicast source addresses. */ + if (ip6_addr_isipv4mappedipv6(ip_2_ip6(&ip_data.current_iphdr_dest)) || + ip6_addr_isipv4mappedipv6(ip_2_ip6(&ip_data.current_iphdr_src)) || + ip6_addr_ismulticast(ip_2_ip6(&ip_data.current_iphdr_src))) { + /* free (drop) packet pbufs */ + pbuf_free(p); + IP6_STATS_INC(ip6.err); + IP6_STATS_INC(ip6.drop); + return ERR_OK; + } + + /* Set the appropriate zone identifier on the addresses. */ + ip6_addr_assign_zone(ip_2_ip6(&ip_data.current_iphdr_dest), IP6_UNKNOWN, inp); + ip6_addr_assign_zone(ip_2_ip6(&ip_data.current_iphdr_src), IP6_UNICAST, inp); + + /* current header pointer. */ + ip_data.current_ip6_header = ip6hdr; + + /* In netif, used in case we need to send ICMPv6 packets back. */ + ip_data.current_netif = inp; + ip_data.current_input_netif = inp; + + /* match packet against an interface, i.e. is this packet for us? */ + if (ip6_addr_ismulticast(ip6_current_dest_addr())) { + /* Always joined to multicast if-local and link-local all-nodes group. */ + if (ip6_addr_isallnodes_iflocal(ip6_current_dest_addr()) || + ip6_addr_isallnodes_linklocal(ip6_current_dest_addr())) { + netif = inp; + } +#if LWIP_IPV6_MLD + else if (mld6_lookfor_group(inp, ip6_current_dest_addr())) { + netif = inp; + } +#else /* LWIP_IPV6_MLD */ + else if (ip6_addr_issolicitednode(ip6_current_dest_addr())) { + u8_t i; + /* Filter solicited node packets when MLD is not enabled + * (for Neighbor discovery). */ + netif = NULL; + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(inp, i)) && + ip6_addr_solicitednode_eq(ip6_current_dest_addr(), netif_ip6_addr(inp, i))) { + netif = inp; + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: solicited node packet accepted on interface %c%c\n", + netif->name[0], netif->name[1])); + break; + } + } + } +#endif /* LWIP_IPV6_MLD */ + else { + netif = NULL; + } + } else { + /* start trying with inp. if that's not acceptable, start walking the + list of configured netifs. */ + if (ip6_input_accept(inp)) { + netif = inp; + } else { + netif = NULL; +#if !IPV6_CUSTOM_SCOPES + /* Shortcut: stop looking for other interfaces if either the source or + * the destination has a scope constrained to this interface. Custom + * scopes may break the 1:1 link/interface mapping, however. */ + if (ip6_addr_islinklocal(ip6_current_dest_addr()) || + ip6_addr_islinklocal(ip6_current_src_addr())) { + goto netif_found; + } +#endif /* !IPV6_CUSTOM_SCOPES */ +#if !LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF + /* The loopback address is to be considered link-local. Packets to it + * should be dropped on other interfaces, as per RFC 4291 Sec. 2.5.3. + * Its implied scope means packets *from* the loopback address should + * not be accepted on other interfaces, either. These requirements + * cannot be implemented in the case that loopback traffic is sent + * across a non-loopback interface, however. */ + if (ip6_addr_isloopback(ip6_current_dest_addr()) || + ip6_addr_isloopback(ip6_current_src_addr())) { + goto netif_found; + } +#endif /* !LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF */ +#if !LWIP_SINGLE_NETIF + NETIF_FOREACH(netif) { + if (netif == inp) { + /* we checked that before already */ + continue; + } + if (ip6_input_accept(netif)) { + break; + } + } +#endif /* !LWIP_SINGLE_NETIF */ + } +netif_found: + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet accepted on interface %c%c\n", + netif ? netif->name[0] : 'X', netif? netif->name[1] : 'X')); + } + + /* "::" packet source address? (used in duplicate address detection) */ + if (ip6_addr_isany(ip6_current_src_addr()) && + (!ip6_addr_issolicitednode(ip6_current_dest_addr()))) { + /* packet source is not valid */ + /* free (drop) packet pbufs */ + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with src ANY_ADDRESS dropped\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + } + + /* packet not for us? */ + if (netif == NULL) { + /* packet not for us, route or discard */ + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_TRACE, ("ip6_input: packet not for us.\n")); +#if LWIP_IPV6_FORWARD + /* non-multicast packet? */ + if (!ip6_addr_ismulticast(ip6_current_dest_addr())) { + /* try to forward IP packet on (other) interfaces */ + ip6_forward(p, ip6hdr, inp); + } +#endif /* LWIP_IPV6_FORWARD */ + pbuf_free(p); + goto ip6_input_cleanup; + } + + /* current netif pointer. */ + ip_data.current_netif = netif; + + /* Save next header type. */ + nexth = &IP6H_NEXTH(ip6hdr); + + /* Init header length. */ + hlen = hlen_tot = IP6_HLEN; + + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: \n")); + ip6_debug_print(p); + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: p->len %"U16_F" p->tot_len %"U16_F"\n", p->len, p->tot_len)); + + /* Move to payload. */ + pbuf_remove_header(p, IP6_HLEN); + + /* Process known option extension headers, if present. */ + while (*nexth != IP6_NEXTH_NONE) + { + switch (*nexth) { + case IP6_NEXTH_HOPBYHOP: + { + s32_t opt_offset; + struct ip6_hbh_hdr *hbh_hdr; + struct ip6_opt_hdr *opt_hdr; + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with Hop-by-Hop options header\n")); + + /* Get and check the header length, while staying in packet bounds. */ + hbh_hdr = (struct ip6_hbh_hdr *)p->payload; + + /* Get next header type. */ + nexth = &IP6_HBH_NEXTH(hbh_hdr); + + /* Get the header length. */ + hlen = (u16_t)(8 * (1 + hbh_hdr->_hlen)); + + if ((p->len < 8) || (hlen > p->len)) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("IPv6 options header (hlen %"U16_F") does not fit in first pbuf (len %"U16_F"), IPv6 packet dropped.\n", + hlen, p->len)); + /* free (drop) packet pbufs */ + pbuf_free(p); + IP6_STATS_INC(ip6.lenerr); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + } + + hlen_tot = (u16_t)(hlen_tot + hlen); + + /* The extended option header starts right after Hop-by-Hop header. */ + opt_offset = IP6_HBH_HLEN; + while (opt_offset < hlen) + { + s32_t opt_dlen = 0; + + opt_hdr = (struct ip6_opt_hdr *)((u8_t *)hbh_hdr + opt_offset); + + switch (IP6_OPT_TYPE(opt_hdr)) { + /* @todo: process IPV6 Hop-by-Hop option data */ + case IP6_PAD1_OPTION: + /* PAD1 option doesn't have length and value field */ + opt_dlen = -1; + break; + case IP6_PADN_OPTION: + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + case IP6_ROUTER_ALERT_OPTION: + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + case IP6_JUMBO_OPTION: + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + default: + /* Check 2 MSB of Hop-by-Hop header type. */ + switch (IP6_OPT_TYPE_ACTION(opt_hdr)) { + case 1: + /* Discard the packet. */ + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid Hop-by-Hop option type dropped.\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + case 2: + /* Send ICMP Parameter Problem */ + icmp6_param_problem(p, ICMP6_PP_OPTION, opt_hdr); + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid Hop-by-Hop option type dropped.\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + case 3: + /* Send ICMP Parameter Problem if destination address is not a multicast address */ + if (!ip6_addr_ismulticast(ip6_current_dest_addr())) { + icmp6_param_problem(p, ICMP6_PP_OPTION, opt_hdr); + } + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid Hop-by-Hop option type dropped.\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + default: + /* Skip over this option. */ + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + } + break; + } + + /* Adjust the offset to move to the next extended option header */ + opt_offset = opt_offset + IP6_OPT_HLEN + opt_dlen; + } + pbuf_remove_header(p, hlen); + break; + } + case IP6_NEXTH_DESTOPTS: + { + s32_t opt_offset; + struct ip6_dest_hdr *dest_hdr; + struct ip6_opt_hdr *opt_hdr; + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with Destination options header\n")); + + dest_hdr = (struct ip6_dest_hdr *)p->payload; + + /* Get next header type. */ + nexth = &IP6_DEST_NEXTH(dest_hdr); + + /* Get the header length. */ + hlen = 8 * (1 + dest_hdr->_hlen); + if ((p->len < 8) || (hlen > p->len)) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("IPv6 options header (hlen %"U16_F") does not fit in first pbuf (len %"U16_F"), IPv6 packet dropped.\n", + hlen, p->len)); + /* free (drop) packet pbufs */ + pbuf_free(p); + IP6_STATS_INC(ip6.lenerr); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + } + + hlen_tot = (u16_t)(hlen_tot + hlen); + + /* The extended option header starts right after Destination header. */ + opt_offset = IP6_DEST_HLEN; + while (opt_offset < hlen) + { + s32_t opt_dlen = 0; + + opt_hdr = (struct ip6_opt_hdr *)((u8_t *)dest_hdr + opt_offset); + + switch (IP6_OPT_TYPE(opt_hdr)) + { + /* @todo: process IPV6 Destination option data */ + case IP6_PAD1_OPTION: + /* PAD1 option deosn't have length and value field */ + opt_dlen = -1; + break; + case IP6_PADN_OPTION: + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + case IP6_ROUTER_ALERT_OPTION: + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + case IP6_JUMBO_OPTION: + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + case IP6_HOME_ADDRESS_OPTION: + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + default: + /* Check 2 MSB of Destination header type. */ + switch (IP6_OPT_TYPE_ACTION(opt_hdr)) + { + case 1: + /* Discard the packet. */ + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid destination option type dropped.\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + case 2: + /* Send ICMP Parameter Problem */ + icmp6_param_problem(p, ICMP6_PP_OPTION, opt_hdr); + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid destination option type dropped.\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + case 3: + /* Send ICMP Parameter Problem if destination address is not a multicast address */ + if (!ip6_addr_ismulticast(ip6_current_dest_addr())) { + icmp6_param_problem(p, ICMP6_PP_OPTION, opt_hdr); + } + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid destination option type dropped.\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + default: + /* Skip over this option. */ + opt_dlen = IP6_OPT_DLEN(opt_hdr); + break; + } + break; + } + + /* Adjust the offset to move to the next extended option header */ + opt_offset = opt_offset + IP6_OPT_HLEN + opt_dlen; + } + + pbuf_remove_header(p, hlen); + break; + } + case IP6_NEXTH_ROUTING: + { + struct ip6_rout_hdr *rout_hdr; + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with Routing header\n")); + + rout_hdr = (struct ip6_rout_hdr *)p->payload; + + /* Get next header type. */ + nexth = &IP6_ROUT_NEXTH(rout_hdr); + + /* Get the header length. */ + hlen = 8 * (1 + rout_hdr->_hlen); + + if ((p->len < 8) || (hlen > p->len)) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("IPv6 options header (hlen %"U16_F") does not fit in first pbuf (len %"U16_F"), IPv6 packet dropped.\n", + hlen, p->len)); + /* free (drop) packet pbufs */ + pbuf_free(p); + IP6_STATS_INC(ip6.lenerr); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + } + + /* Skip over this header. */ + hlen_tot = (u16_t)(hlen_tot + hlen); + + /* if segment left value is 0 in routing header, ignore the option */ + if (IP6_ROUT_SEG_LEFT(rout_hdr)) { + /* The length field of routing option header must be even */ + if (rout_hdr->_hlen & 0x1) { + /* Discard and send parameter field error */ + icmp6_param_problem(p, ICMP6_PP_FIELD, &rout_hdr->_hlen); + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid routing type dropped\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + } + + switch (IP6_ROUT_TYPE(rout_hdr)) + { + /* TODO: process routing by the type */ + case IP6_ROUT_TYPE2: + break; + case IP6_ROUT_RPL: + break; + default: + /* Discard unrecognized routing type and send parameter field error */ + icmp6_param_problem(p, ICMP6_PP_FIELD, &IP6_ROUT_TYPE(rout_hdr)); + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid routing type dropped\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + } + } + + pbuf_remove_header(p, hlen); + break; + } + case IP6_NEXTH_FRAGMENT: + { + struct ip6_frag_hdr *frag_hdr; + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with Fragment header\n")); + + frag_hdr = (struct ip6_frag_hdr *)p->payload; + + /* Get next header type. */ + nexth = &IP6_FRAG_NEXTH(frag_hdr); + + /* Fragment Header length. */ + hlen = 8; + + /* Make sure this header fits in current pbuf. */ + if (hlen > p->len) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("IPv6 options header (hlen %"U16_F") does not fit in first pbuf (len %"U16_F"), IPv6 packet dropped.\n", + hlen, p->len)); + /* free (drop) packet pbufs */ + pbuf_free(p); + IP6_FRAG_STATS_INC(ip6_frag.lenerr); + IP6_FRAG_STATS_INC(ip6_frag.drop); + goto ip6_input_cleanup; + } + + hlen_tot = (u16_t)(hlen_tot + hlen); + + /* check payload length is multiple of 8 octets when mbit is set */ + if (IP6_FRAG_MBIT(frag_hdr) && (IP6H_PLEN(ip6hdr) & 0x7)) { + /* ipv6 payload length is not multiple of 8 octets */ + icmp6_param_problem(p, ICMP6_PP_FIELD, LWIP_PACKED_CAST(const void *, &ip6hdr->_plen)); + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid payload length dropped\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + } + + /* Offset == 0 and more_fragments == 0? */ + if ((frag_hdr->_fragment_offset & + PP_HTONS(IP6_FRAG_OFFSET_MASK | IP6_FRAG_MORE_FLAG)) == 0) { + /* This is a 1-fragment packet. Skip this header and continue. */ + pbuf_remove_header(p, hlen); + } else { +#if LWIP_IPV6_REASS + /* reassemble the packet */ + ip_data.current_ip_header_tot_len = hlen_tot; + p = ip6_reass(p); + /* packet not fully reassembled yet? */ + if (p == NULL) { + goto ip6_input_cleanup; + } + + /* Returned p point to IPv6 header. + * Update all our variables and pointers and continue. */ + ip6hdr = (struct ip6_hdr *)p->payload; + nexth = &IP6H_NEXTH(ip6hdr); + hlen = hlen_tot = IP6_HLEN; + pbuf_remove_header(p, IP6_HLEN); + +#else /* LWIP_IPV6_REASS */ + /* free (drop) packet pbufs */ + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with Fragment header dropped (with LWIP_IPV6_REASS==0)\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.opterr); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; +#endif /* LWIP_IPV6_REASS */ + } + break; + } + default: + goto options_done; + } + + if (*nexth == IP6_NEXTH_HOPBYHOP) { + /* Hop-by-Hop header comes only as a first option */ + icmp6_param_problem(p, ICMP6_PP_HEADER, nexth); + LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with Hop-by-Hop options header dropped (only valid as a first option)\n")); + pbuf_free(p); + IP6_STATS_INC(ip6.drop); + goto ip6_input_cleanup; + } + } + +options_done: + + /* send to upper layers */ + ip_data.current_ip_header_tot_len = hlen_tot; + +#if LWIP_RAW + /* p points to IPv6 header again for raw_input. */ + pbuf_add_header_force(p, hlen_tot); + /* raw input did not eat the packet? */ + raw_status = raw_input(p, inp); + if (raw_status != RAW_INPUT_EATEN) + { + /* Point to payload. */ + pbuf_remove_header(p, hlen_tot); +#else /* LWIP_RAW */ + { +#endif /* LWIP_RAW */ + switch (*nexth) { + case IP6_NEXTH_NONE: + pbuf_free(p); + break; +#if LWIP_UDP + case IP6_NEXTH_UDP: +#if LWIP_UDPLITE + case IP6_NEXTH_UDPLITE: +#endif /* LWIP_UDPLITE */ + udp_input(p, inp); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case IP6_NEXTH_TCP: + tcp_input(p, inp); + break; +#endif /* LWIP_TCP */ +#if LWIP_ICMP6 + case IP6_NEXTH_ICMP6: + icmp6_input(p, inp); + break; +#endif /* LWIP_ICMP */ + default: +#if LWIP_RAW + if (raw_status == RAW_INPUT_DELIVERED) { + /* @todo: ipv6 mib in-delivers? */ + } else +#endif /* LWIP_RAW */ + { +#if LWIP_ICMP6 + /* p points to IPv6 header again for raw_input. */ + pbuf_add_header_force(p, hlen_tot); + /* send ICMP parameter problem unless it was a multicast or ICMPv6 */ + if ((!ip6_addr_ismulticast(ip6_current_dest_addr())) && + (IP6H_NEXTH(ip6hdr) != IP6_NEXTH_ICMP6)) { + icmp6_param_problem(p, ICMP6_PP_HEADER, nexth); + } +#endif /* LWIP_ICMP */ + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip6_input: Unsupported transport protocol %"U16_F"\n", (u16_t)IP6H_NEXTH(ip6hdr))); + IP6_STATS_INC(ip6.proterr); + IP6_STATS_INC(ip6.drop); + } + pbuf_free(p); + break; + } + } + +ip6_input_cleanup: + ip_data.current_netif = NULL; + ip_data.current_input_netif = NULL; + ip_data.current_ip6_header = NULL; + ip_data.current_ip_header_tot_len = 0; + ip6_addr_set_zero(ip6_current_src_addr()); + ip6_addr_set_zero(ip6_current_dest_addr()); + + return ERR_OK; +} + + +/** + * Sends an IPv6 packet on a network interface. This function constructs + * the IPv6 header. If the source IPv6 address is NULL, the IPv6 "ANY" address is + * used as source (usually during network startup). If the source IPv6 address it + * IP6_ADDR_ANY, the most appropriate IPv6 address of the outgoing network + * interface is filled in as source address. If the destination IPv6 address is + * LWIP_IP_HDRINCL, p is assumed to already include an IPv6 header and + * p->payload points to it instead of the data. + * + * @param p the packet to send (p->payload points to the data, e.g. next + protocol header; if dest == LWIP_IP_HDRINCL, p already includes an + IPv6 header and p->payload points to that IPv6 header) + * @param src the source IPv6 address to send from (if src == IP6_ADDR_ANY, an + * IP address of the netif is selected and used as source address. + * if src == NULL, IP6_ADDR_ANY is used as source) (src is possibly not + * properly zoned) + * @param dest the destination IPv6 address to send the packet to (possibly not + * properly zoned) + * @param hl the Hop Limit value to be set in the IPv6 header + * @param tc the Traffic Class value to be set in the IPv6 header + * @param nexth the Next Header to be set in the IPv6 header + * @param netif the netif on which to send this packet + * @return ERR_OK if the packet was sent OK + * ERR_BUF if p doesn't have enough space for IPv6/LINK headers + * returns errors returned by netif->output_ip6 + */ +err_t +ip6_output_if(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest, + u8_t hl, u8_t tc, + u8_t nexth, struct netif *netif) +{ + const ip6_addr_t *src_used = src; + if (dest != LWIP_IP_HDRINCL) { + if (src != NULL && ip6_addr_isany(src)) { + src_used = ip_2_ip6(ip6_select_source_address(netif, dest)); + if ((src_used == NULL) || ip6_addr_isany(src_used)) { + /* No appropriate source address was found for this packet. */ + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip6_output: No suitable source address for packet.\n")); + IP6_STATS_INC(ip6.rterr); + return ERR_RTE; + } + } + } + return ip6_output_if_src(p, src_used, dest, hl, tc, nexth, netif); +} + +/** + * Same as ip6_output_if() but 'src' address is not replaced by netif address + * when it is 'any'. + */ +err_t +ip6_output_if_src(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest, + u8_t hl, u8_t tc, + u8_t nexth, struct netif *netif) +{ + struct ip6_hdr *ip6hdr; + ip6_addr_t dest_addr; + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p); + + /* Should the IPv6 header be generated or is it already included in p? */ + if (dest != LWIP_IP_HDRINCL) { +#if LWIP_IPV6_SCOPES + /* If the destination address is scoped but lacks a zone, add a zone now, + * based on the outgoing interface. The lower layers (e.g., nd6) absolutely + * require addresses to be properly zoned for correctness. In some cases, + * earlier attempts will have been made to add a zone to the destination, + * but this function is the only one that is called in all (other) cases, + * so we must do this here. */ + if (ip6_addr_lacks_zone(dest, IP6_UNKNOWN)) { + ip6_addr_copy(dest_addr, *dest); + ip6_addr_assign_zone(&dest_addr, IP6_UNKNOWN, netif); + dest = &dest_addr; + } +#endif /* LWIP_IPV6_SCOPES */ + + /* generate IPv6 header */ + if (pbuf_add_header(p, IP6_HLEN)) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip6_output: not enough room for IPv6 header in pbuf\n")); + IP6_STATS_INC(ip6.err); + return ERR_BUF; + } + + ip6hdr = (struct ip6_hdr *)p->payload; + LWIP_ASSERT("check that first pbuf can hold struct ip6_hdr", + (p->len >= sizeof(struct ip6_hdr))); + + IP6H_HOPLIM_SET(ip6hdr, hl); + IP6H_NEXTH_SET(ip6hdr, nexth); + + /* dest cannot be NULL here */ + ip6_addr_copy_to_packed(ip6hdr->dest, *dest); + + IP6H_VTCFL_SET(ip6hdr, 6, tc, 0); + IP6H_PLEN_SET(ip6hdr, (u16_t)(p->tot_len - IP6_HLEN)); + + if (src == NULL) { + src = IP6_ADDR_ANY6; + } + /* src cannot be NULL here */ + ip6_addr_copy_to_packed(ip6hdr->src, *src); + + } else { + /* IP header already included in p */ + ip6hdr = (struct ip6_hdr *)p->payload; + ip6_addr_copy_from_packed(dest_addr, ip6hdr->dest); + ip6_addr_assign_zone(&dest_addr, IP6_UNKNOWN, netif); + dest = &dest_addr; + } + + IP6_STATS_INC(ip6.xmit); + + LWIP_DEBUGF(IP6_DEBUG, ("ip6_output_if: %c%c%"U16_F"\n", netif->name[0], netif->name[1], (u16_t)netif->num)); + ip6_debug_print(p); + +#if ENABLE_LOOPBACK + { + int i; +#if !LWIP_HAVE_LOOPIF + if (ip6_addr_isloopback(dest)) { + return netif_loop_output(netif, p); + } +#endif /* !LWIP_HAVE_LOOPIF */ + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) && + ip6_addr_eq(dest, netif_ip6_addr(netif, i))) { + /* Packet to self, enqueue it for loopback */ + LWIP_DEBUGF(IP6_DEBUG, ("netif_loop_output()\n")); + return netif_loop_output(netif, p); + } + } + } +#if LWIP_MULTICAST_TX_OPTIONS + if ((p->flags & PBUF_FLAG_MCASTLOOP) != 0) { + netif_loop_output(netif, p); + } +#endif /* LWIP_MULTICAST_TX_OPTIONS */ +#endif /* ENABLE_LOOPBACK */ +#if LWIP_IPV6_FRAG + /* don't fragment if interface has mtu set to 0 [loopif] */ + if (netif_mtu6(netif) && (p->tot_len > nd6_get_destination_mtu(dest, netif))) { + return ip6_frag(p, netif, dest); + } +#endif /* LWIP_IPV6_FRAG */ + + LWIP_DEBUGF(IP6_DEBUG, ("netif->output_ip6()\n")); + return netif->output_ip6(netif, p, dest); +} + +/** + * Simple interface to ip6_output_if. It finds the outgoing network + * interface and calls upon ip6_output_if to do the actual work. + * + * @param p the packet to send (p->payload points to the data, e.g. next + protocol header; if dest == LWIP_IP_HDRINCL, p already includes an + IPv6 header and p->payload points to that IPv6 header) + * @param src the source IPv6 address to send from (if src == IP6_ADDR_ANY, an + * IP address of the netif is selected and used as source address. + * if src == NULL, IP6_ADDR_ANY is used as source) + * @param dest the destination IPv6 address to send the packet to + * @param hl the Hop Limit value to be set in the IPv6 header + * @param tc the Traffic Class value to be set in the IPv6 header + * @param nexth the Next Header to be set in the IPv6 header + * + * @return ERR_RTE if no route is found + * see ip_output_if() for more return values + */ +err_t +ip6_output(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest, + u8_t hl, u8_t tc, u8_t nexth) +{ + struct netif *netif; + struct ip6_hdr *ip6hdr; + ip6_addr_t src_addr, dest_addr; + + LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p); + + if (dest != LWIP_IP_HDRINCL) { + netif = ip6_route(src, dest); + } else { + /* IP header included in p, read addresses. */ + ip6hdr = (struct ip6_hdr *)p->payload; + ip6_addr_copy_from_packed(src_addr, ip6hdr->src); + ip6_addr_copy_from_packed(dest_addr, ip6hdr->dest); + netif = ip6_route(&src_addr, &dest_addr); + dest = &dest_addr; + } + + if (netif == NULL) { + LWIP_DEBUGF(IP6_DEBUG, ("ip6_output: no route for %"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F"\n", + IP6_ADDR_BLOCK1(dest), + IP6_ADDR_BLOCK2(dest), + IP6_ADDR_BLOCK3(dest), + IP6_ADDR_BLOCK4(dest), + IP6_ADDR_BLOCK5(dest), + IP6_ADDR_BLOCK6(dest), + IP6_ADDR_BLOCK7(dest), + IP6_ADDR_BLOCK8(dest))); + IP6_STATS_INC(ip6.rterr); + return ERR_RTE; + } + + return ip6_output_if(p, src, dest, hl, tc, nexth, netif); +} + + +#if LWIP_NETIF_USE_HINTS +/** Like ip6_output, but takes and addr_hint pointer that is passed on to netif->addr_hint + * before calling ip6_output_if. + * + * @param p the packet to send (p->payload points to the data, e.g. next + protocol header; if dest == LWIP_IP_HDRINCL, p already includes an + IPv6 header and p->payload points to that IPv6 header) + * @param src the source IPv6 address to send from (if src == IP6_ADDR_ANY, an + * IP address of the netif is selected and used as source address. + * if src == NULL, IP6_ADDR_ANY is used as source) + * @param dest the destination IPv6 address to send the packet to + * @param hl the Hop Limit value to be set in the IPv6 header + * @param tc the Traffic Class value to be set in the IPv6 header + * @param nexth the Next Header to be set in the IPv6 header + * @param netif_hint netif output hint pointer set to netif->hint before + * calling ip_output_if() + * + * @return ERR_RTE if no route is found + * see ip_output_if() for more return values + */ +err_t +ip6_output_hinted(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest, + u8_t hl, u8_t tc, u8_t nexth, struct netif_hint *netif_hint) +{ + struct netif *netif; + struct ip6_hdr *ip6hdr; + ip6_addr_t src_addr, dest_addr; + err_t err; + + LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p); + + if (dest != LWIP_IP_HDRINCL) { + netif = ip6_route(src, dest); + } else { + /* IP header included in p, read addresses. */ + ip6hdr = (struct ip6_hdr *)p->payload; + ip6_addr_copy_from_packed(src_addr, ip6hdr->src); + ip6_addr_copy_from_packed(dest_addr, ip6hdr->dest); + netif = ip6_route(&src_addr, &dest_addr); + dest = &dest_addr; + } + + if (netif == NULL) { + LWIP_DEBUGF(IP6_DEBUG, ("ip6_output: no route for %"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F":%"X16_F"\n", + IP6_ADDR_BLOCK1(dest), + IP6_ADDR_BLOCK2(dest), + IP6_ADDR_BLOCK3(dest), + IP6_ADDR_BLOCK4(dest), + IP6_ADDR_BLOCK5(dest), + IP6_ADDR_BLOCK6(dest), + IP6_ADDR_BLOCK7(dest), + IP6_ADDR_BLOCK8(dest))); + IP6_STATS_INC(ip6.rterr); + return ERR_RTE; + } + + NETIF_SET_HINTS(netif, netif_hint); + err = ip6_output_if(p, src, dest, hl, tc, nexth, netif); + NETIF_RESET_HINTS(netif); + + return err; +} +#endif /* LWIP_NETIF_USE_HINTS*/ + +#if LWIP_IPV6_MLD +/** + * Add a hop-by-hop options header with a router alert option and padding. + * + * Used by MLD when sending a Multicast listener report/done message. + * + * @param p the packet to which we will prepend the options header + * @param nexth the next header protocol number (e.g. IP6_NEXTH_ICMP6) + * @param value the value of the router alert option data (e.g. IP6_ROUTER_ALERT_VALUE_MLD) + * @return ERR_OK if hop-by-hop header was added, ERR_* otherwise + */ +err_t +ip6_options_add_hbh_ra(struct pbuf *p, u8_t nexth, u8_t value) +{ + u8_t *opt_data; + u32_t offset = 0; + struct ip6_hbh_hdr *hbh_hdr; + struct ip6_opt_hdr *opt_hdr; + + /* fixed 4 bytes for router alert option and 2 bytes padding */ + const u8_t hlen = (sizeof(struct ip6_opt_hdr) * 2) + IP6_ROUTER_ALERT_DLEN; + /* Move pointer to make room for hop-by-hop options header. */ + if (pbuf_add_header(p, sizeof(struct ip6_hbh_hdr) + hlen)) { + LWIP_DEBUGF(IP6_DEBUG, ("ip6_options: no space for options header\n")); + IP6_STATS_INC(ip6.err); + return ERR_BUF; + } + + /* Set fields of Hop-by-Hop header */ + hbh_hdr = (struct ip6_hbh_hdr *)p->payload; + IP6_HBH_NEXTH(hbh_hdr) = nexth; + hbh_hdr->_hlen = 0; + offset = IP6_HBH_HLEN; + + /* Set router alert options to Hop-by-Hop extended option header */ + opt_hdr = (struct ip6_opt_hdr *)((u8_t *)hbh_hdr + offset); + IP6_OPT_TYPE(opt_hdr) = IP6_ROUTER_ALERT_OPTION; + IP6_OPT_DLEN(opt_hdr) = IP6_ROUTER_ALERT_DLEN; + offset += IP6_OPT_HLEN; + + /* Set router alert option data */ + opt_data = (u8_t *)hbh_hdr + offset; + opt_data[0] = value; + opt_data[1] = 0; + offset += IP6_OPT_DLEN(opt_hdr); + + /* add 2 bytes padding to make 8 bytes Hop-by-Hop header length */ + opt_hdr = (struct ip6_opt_hdr *)((u8_t *)hbh_hdr + offset); + IP6_OPT_TYPE(opt_hdr) = IP6_PADN_OPTION; + IP6_OPT_DLEN(opt_hdr) = 0; + + return ERR_OK; +} +#endif /* LWIP_IPV6_MLD */ + +#if IP6_DEBUG +/* Print an IPv6 header by using LWIP_DEBUGF + * @param p an IPv6 packet, p->payload pointing to the IPv6 header + */ +void +ip6_debug_print(struct pbuf *p) +{ + struct ip6_hdr *ip6hdr = (struct ip6_hdr *)p->payload; + + LWIP_DEBUGF(IP6_DEBUG, ("IPv6 header:\n")); + LWIP_DEBUGF(IP6_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP6_DEBUG, ("| %2"U16_F" | %3"U16_F" | %7"U32_F" | (ver, class, flow)\n", + IP6H_V(ip6hdr), + IP6H_TC(ip6hdr), + IP6H_FL(ip6hdr))); + LWIP_DEBUGF(IP6_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP6_DEBUG, ("| %5"U16_F" | %3"U16_F" | %3"U16_F" | (plen, nexth, hopl)\n", + IP6H_PLEN(ip6hdr), + IP6H_NEXTH(ip6hdr), + IP6H_HOPLIM(ip6hdr))); + LWIP_DEBUGF(IP6_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP6_DEBUG, ("| %4"X32_F" | %4"X32_F" | %4"X32_F" | %4"X32_F" | (src)\n", + IP6_ADDR_BLOCK1(&(ip6hdr->src)), + IP6_ADDR_BLOCK2(&(ip6hdr->src)), + IP6_ADDR_BLOCK3(&(ip6hdr->src)), + IP6_ADDR_BLOCK4(&(ip6hdr->src)))); + LWIP_DEBUGF(IP6_DEBUG, ("| %4"X32_F" | %4"X32_F" | %4"X32_F" | %4"X32_F" |\n", + IP6_ADDR_BLOCK5(&(ip6hdr->src)), + IP6_ADDR_BLOCK6(&(ip6hdr->src)), + IP6_ADDR_BLOCK7(&(ip6hdr->src)), + IP6_ADDR_BLOCK8(&(ip6hdr->src)))); + LWIP_DEBUGF(IP6_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(IP6_DEBUG, ("| %4"X32_F" | %4"X32_F" | %4"X32_F" | %4"X32_F" | (dest)\n", + IP6_ADDR_BLOCK1(&(ip6hdr->dest)), + IP6_ADDR_BLOCK2(&(ip6hdr->dest)), + IP6_ADDR_BLOCK3(&(ip6hdr->dest)), + IP6_ADDR_BLOCK4(&(ip6hdr->dest)))); + LWIP_DEBUGF(IP6_DEBUG, ("| %4"X32_F" | %4"X32_F" | %4"X32_F" | %4"X32_F" |\n", + IP6_ADDR_BLOCK5(&(ip6hdr->dest)), + IP6_ADDR_BLOCK6(&(ip6hdr->dest)), + IP6_ADDR_BLOCK7(&(ip6hdr->dest)), + IP6_ADDR_BLOCK8(&(ip6hdr->dest)))); + LWIP_DEBUGF(IP6_DEBUG, ("+-------------------------------+\n")); +} +#endif /* IP6_DEBUG */ + +#endif /* LWIP_IPV6 */ diff --git a/lib/lwip/core/ipv6/ip6_addr.c b/lib/lwip/core/ipv6/ip6_addr.c new file mode 100644 index 0000000000..6e0ac86b05 --- /dev/null +++ b/lib/lwip/core/ipv6/ip6_addr.c @@ -0,0 +1,355 @@ +/** + * @file + * + * IPv6 addresses. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * Functions for handling IPv6 addresses. + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#include "lwip/opt.h" + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/ip_addr.h" +#include "lwip/def.h" +#include "lwip/netif.h" + +#include <string.h> + +#if LWIP_IPV4 +#include "lwip/ip4_addr.h" /* for ip6addr_aton to handle IPv4-mapped addresses */ +#endif /* LWIP_IPV4 */ + +/* used by IP6_ADDR_ANY(6) in ip6_addr.h */ +const ip_addr_t ip6_addr_any = IPADDR6_INIT(0ul, 0ul, 0ul, 0ul); + +#define lwip_xchar(i) ((char)((i) < 10 ? '0' + (i) : 'A' + (i) - 10)) + +/** + * Check whether "cp" is a valid ascii representation + * of an IPv6 address and convert to a binary address. + * Returns 1 if the address is valid, 0 if not. + * + * @param cp IPv6 address in ascii representation (e.g. "FF01::1") + * @param addr pointer to which to save the ip address in network order + * @return 1 if cp could be converted to addr, 0 on failure + */ +int +ip6addr_aton(const char *cp, ip6_addr_t *addr) +{ + u32_t addr_index, zero_blocks, current_block_index, current_block_value; + const char *s; +#if LWIP_IPV4 + int check_ipv4_mapped = 0; +#endif /* LWIP_IPV4 */ + + /* Count the number of colons, to count the number of blocks in a "::" sequence + zero_blocks may be 1 even if there are no :: sequences */ + zero_blocks = 8; + for (s = cp; *s != 0; s++) { + if (*s == ':') { + zero_blocks--; +#if LWIP_IPV4 + } else if (*s == '.') { + if ((zero_blocks == 5) ||(zero_blocks == 2)) { + check_ipv4_mapped = 1; + /* last block could be the start of an IPv4 address */ + zero_blocks--; + } else { + /* invalid format */ + return 0; + } + break; +#endif /* LWIP_IPV4 */ + } else if (!lwip_isxdigit(*s)) { + break; + } + } + + /* parse each block */ + addr_index = 0; + current_block_index = 0; + current_block_value = 0; + for (s = cp; *s != 0; s++) { + if (*s == ':') { + if (addr) { + if (current_block_index & 0x1) { + addr->addr[addr_index++] |= current_block_value; + } + else { + addr->addr[addr_index] = current_block_value << 16; + } + } + current_block_index++; +#if LWIP_IPV4 + if (check_ipv4_mapped) { + if (current_block_index == 6) { + ip4_addr_t ip4; + int ret = ip4addr_aton(s + 1, &ip4); + if (ret) { + if (addr) { + addr->addr[3] = lwip_htonl(ip4.addr); + current_block_index++; + goto fix_byte_order_and_return; + } + return 1; + } + } + } +#endif /* LWIP_IPV4 */ + current_block_value = 0; + if (current_block_index > 7) { + /* address too long! */ + return 0; + } + if (s[1] == ':') { + if (s[2] == ':') { + /* invalid format: three successive colons */ + return 0; + } + s++; + /* "::" found, set zeros */ + while (zero_blocks > 0) { + zero_blocks--; + if (current_block_index & 0x1) { + addr_index++; + } else { + if (addr) { + addr->addr[addr_index] = 0; + } + } + current_block_index++; + if (current_block_index > 7) { + /* address too long! */ + return 0; + } + } + } + } else if (lwip_isxdigit(*s)) { + /* add current digit */ + current_block_value = (current_block_value << 4) + + (lwip_isdigit(*s) ? (u32_t)(*s - '0') : + (u32_t)(10 + (lwip_islower(*s) ? *s - 'a' : *s - 'A'))); + } else { + /* unexpected digit, space? CRLF? */ + break; + } + } + + if (addr) { + if (current_block_index & 0x1) { + addr->addr[addr_index++] |= current_block_value; + } + else { + addr->addr[addr_index] = current_block_value << 16; + } +#if LWIP_IPV4 +fix_byte_order_and_return: +#endif + /* convert to network byte order. */ + for (addr_index = 0; addr_index < 4; addr_index++) { + addr->addr[addr_index] = lwip_htonl(addr->addr[addr_index]); + } + + ip6_addr_clear_zone(addr); +#if LWIP_IPV6_SCOPES + if (*s == '%') { + const char *scopestr = s + 1; + if (*scopestr) { + struct netif *netif = netif_find(scopestr); + if (netif) { + ip6_addr_assign_zone(addr, IP6_UNKNOWN, netif); + } + } + } +#endif + } + + if (current_block_index != 7) { + return 0; + } + + return 1; +} + +/** + * Convert numeric IPv6 address into ASCII representation. + * returns ptr to static buffer; not reentrant! + * + * @param addr ip6 address in network order to convert + * @return pointer to a global static (!) buffer that holds the ASCII + * representation of addr + */ +char * +ip6addr_ntoa(const ip6_addr_t *addr) +{ + static char str[40]; + return ip6addr_ntoa_r(addr, str, 40); +} + +/** + * Same as ipaddr_ntoa, but reentrant since a user-supplied buffer is used. + * + * @param addr ip6 address in network order to convert + * @param buf target buffer where the string is stored + * @param buflen length of buf + * @return either pointer to buf which now holds the ASCII + * representation of addr or NULL if buf was too small + */ +char * +ip6addr_ntoa_r(const ip6_addr_t *addr, char *buf, int buflen) +{ + u32_t current_block_index, current_block_value, next_block_value; + s32_t i; + u8_t zero_flag, empty_block_flag; + +#if LWIP_IPV4 + if (ip6_addr_isipv4mappedipv6(addr)) { + /* This is an IPv4 mapped address */ + ip4_addr_t addr4; + char *ret; +#define IP4MAPPED_HEADER "::FFFF:" + char *buf_ip4 = buf + sizeof(IP4MAPPED_HEADER) - 1; + int buflen_ip4 = buflen - sizeof(IP4MAPPED_HEADER) + 1; + if (buflen < (int)sizeof(IP4MAPPED_HEADER)) { + return NULL; + } + memcpy(buf, IP4MAPPED_HEADER, sizeof(IP4MAPPED_HEADER)); + addr4.addr = addr->addr[3]; + ret = ip4addr_ntoa_r(&addr4, buf_ip4, buflen_ip4); + if (ret != buf_ip4) { + return NULL; + } + return buf; + } +#endif /* LWIP_IPV4 */ + i = 0; + empty_block_flag = 0; /* used to indicate a zero chain for "::' */ + + for (current_block_index = 0; current_block_index < 8; current_block_index++) { + /* get the current 16-bit block */ + current_block_value = lwip_htonl(addr->addr[current_block_index >> 1]); + if ((current_block_index & 0x1) == 0) { + current_block_value = current_block_value >> 16; + } + current_block_value &= 0xffff; + + /* Check for empty block. */ + if (current_block_value == 0) { + if (current_block_index == 7 && empty_block_flag == 1) { + /* special case, we must render a ':' for the last block. */ + buf[i++] = ':'; + if (i >= buflen) { + return NULL; + } + break; + } + if (empty_block_flag == 0) { + /* generate empty block "::", but only if more than one contiguous zero block, + * according to current formatting suggestions RFC 5952. */ + next_block_value = lwip_htonl(addr->addr[(current_block_index + 1) >> 1]); + if ((current_block_index & 0x1) == 0x01) { + next_block_value = next_block_value >> 16; + } + next_block_value &= 0xffff; + if (next_block_value == 0) { + empty_block_flag = 1; + buf[i++] = ':'; + if (i >= buflen) { + return NULL; + } + continue; /* move on to next block. */ + } + } else if (empty_block_flag == 1) { + /* move on to next block. */ + continue; + } + } else if (empty_block_flag == 1) { + /* Set this flag value so we don't produce multiple empty blocks. */ + empty_block_flag = 2; + } + + if (current_block_index > 0) { + buf[i++] = ':'; + if (i >= buflen) { + return NULL; + } + } + + if ((current_block_value & 0xf000) == 0) { + zero_flag = 1; + } else { + buf[i++] = lwip_xchar(((current_block_value & 0xf000) >> 12)); + zero_flag = 0; + if (i >= buflen) { + return NULL; + } + } + + if (((current_block_value & 0xf00) == 0) && (zero_flag)) { + /* do nothing */ + } else { + buf[i++] = lwip_xchar(((current_block_value & 0xf00) >> 8)); + zero_flag = 0; + if (i >= buflen) { + return NULL; + } + } + + if (((current_block_value & 0xf0) == 0) && (zero_flag)) { + /* do nothing */ + } + else { + buf[i++] = lwip_xchar(((current_block_value & 0xf0) >> 4)); + zero_flag = 0; + if (i >= buflen) { + return NULL; + } + } + + buf[i++] = lwip_xchar((current_block_value & 0xf)); + if (i >= buflen) { + return NULL; + } + } + + buf[i] = 0; + + return buf; +} + +#endif /* LWIP_IPV6 */ diff --git a/lib/lwip/core/ipv6/ip6_frag.c b/lib/lwip/core/ipv6/ip6_frag.c new file mode 100644 index 0000000000..16bcf95087 --- /dev/null +++ b/lib/lwip/core/ipv6/ip6_frag.c @@ -0,0 +1,862 @@ +/** + * @file + * + * IPv6 fragmentation and reassembly. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#include "lwip/opt.h" +#include "lwip/ip6_frag.h" +#include "lwip/ip6.h" +#include "lwip/icmp6.h" +#include "lwip/nd6.h" +#include "lwip/ip.h" + +#include "lwip/pbuf.h" +#include "lwip/memp.h" +#include "lwip/stats.h" + +#include <string.h> + +#if LWIP_IPV6 && LWIP_IPV6_REASS /* don't build if not configured for use in lwipopts.h */ + + +/** Setting this to 0, you can turn off checking the fragments for overlapping + * regions. The code gets a little smaller. Only use this if you know that + * overlapping won't occur on your network! */ +#ifndef IP_REASS_CHECK_OVERLAP +#define IP_REASS_CHECK_OVERLAP 1 +#endif /* IP_REASS_CHECK_OVERLAP */ + +/** Set to 0 to prevent freeing the oldest datagram when the reassembly buffer is + * full (IP_REASS_MAX_PBUFS pbufs are enqueued). The code gets a little smaller. + * Datagrams will be freed by timeout only. Especially useful when MEMP_NUM_REASSDATA + * is set to 1, so one datagram can be reassembled at a time, only. */ +#ifndef IP_REASS_FREE_OLDEST +#define IP_REASS_FREE_OLDEST 1 +#endif /* IP_REASS_FREE_OLDEST */ + +#if IPV6_FRAG_COPYHEADER +/* The number of bytes we need to "borrow" from (i.e., overwrite in) the header + * that precedes the fragment header for reassembly pruposes. */ +#define IPV6_FRAG_REQROOM ((s16_t)(sizeof(struct ip6_reass_helper) - IP6_FRAG_HLEN)) +#endif + +#define IP_REASS_FLAG_LASTFRAG 0x01 + +/** This is a helper struct which holds the starting + * offset and the ending offset of this fragment to + * easily chain the fragments. + * It has the same packing requirements as the IPv6 header, since it replaces + * the Fragment Header in memory in incoming fragments to keep + * track of the various fragments. + */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip6_reass_helper { + PACK_STRUCT_FIELD(struct pbuf *next_pbuf); + PACK_STRUCT_FIELD(u16_t start); + PACK_STRUCT_FIELD(u16_t end); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/* static variables */ +static struct ip6_reassdata *reassdatagrams; +static u16_t ip6_reass_pbufcount; + +/* Forward declarations. */ +static void ip6_reass_free_complete_datagram(struct ip6_reassdata *ipr); +#if IP_REASS_FREE_OLDEST +static void ip6_reass_remove_oldest_datagram(struct ip6_reassdata *ipr, int pbufs_needed); +#endif /* IP_REASS_FREE_OLDEST */ + +void +ip6_reass_tmr(void) +{ + struct ip6_reassdata *r, *tmp; + +#if !IPV6_FRAG_COPYHEADER + LWIP_ASSERT("sizeof(struct ip6_reass_helper) <= IP6_FRAG_HLEN, set IPV6_FRAG_COPYHEADER to 1", + sizeof(struct ip6_reass_helper) <= IP6_FRAG_HLEN); +#endif /* !IPV6_FRAG_COPYHEADER */ + + r = reassdatagrams; + while (r != NULL) { + /* Decrement the timer. Once it reaches 0, + * clean up the incomplete fragment assembly */ + if (r->timer > 0) { + r->timer--; + r = r->next; + } else { + /* reassembly timed out */ + tmp = r; + /* get the next pointer before freeing */ + r = r->next; + /* free the helper struct and all enqueued pbufs */ + ip6_reass_free_complete_datagram(tmp); + } + } +} + +/** + * Free a datagram (struct ip6_reassdata) and all its pbufs. + * Updates the total count of enqueued pbufs (ip6_reass_pbufcount), + * sends an ICMP time exceeded packet. + * + * @param ipr datagram to free + */ +static void +ip6_reass_free_complete_datagram(struct ip6_reassdata *ipr) +{ + struct ip6_reassdata *prev; + u16_t pbufs_freed = 0; + u16_t clen; + struct pbuf *p; + struct ip6_reass_helper *iprh; + +#if LWIP_ICMP6 + iprh = (struct ip6_reass_helper *)ipr->p->payload; + if (iprh->start == 0) { + /* The first fragment was received, send ICMP time exceeded. */ + /* First, de-queue the first pbuf from r->p. */ + p = ipr->p; + ipr->p = iprh->next_pbuf; + /* Restore the part that we've overwritten with our helper structure, or we + * might send garbage (and disclose a pointer) in the ICMPv6 reply. */ + MEMCPY(p->payload, ipr->orig_hdr, sizeof(iprh)); + /* Then, move back to the original ipv6 header (we are now pointing to Fragment header). + This cannot fail since we already checked when receiving this fragment. */ + if (pbuf_header_force(p, (s16_t)((u8_t*)p->payload - (u8_t*)ipr->iphdr))) { + LWIP_ASSERT("ip6_reass_free: moving p->payload to ip6 header failed", 0); + } + else { + /* Reconstruct the zoned source and destination addresses, so that we do + * not end up sending the ICMP response over the wrong link. */ + ip6_addr_t src_addr, dest_addr; + ip6_addr_copy_from_packed(src_addr, IPV6_FRAG_SRC(ipr)); + ip6_addr_set_zone(&src_addr, ipr->src_zone); + ip6_addr_copy_from_packed(dest_addr, IPV6_FRAG_DEST(ipr)); + ip6_addr_set_zone(&dest_addr, ipr->dest_zone); + /* Send the actual ICMP response. */ + icmp6_time_exceeded_with_addrs(p, ICMP6_TE_FRAG, &src_addr, &dest_addr); + } + clen = pbuf_clen(p); + LWIP_ASSERT("pbufs_freed + clen <= 0xffff", pbufs_freed + clen <= 0xffff); + pbufs_freed = (u16_t)(pbufs_freed + clen); + pbuf_free(p); + } +#endif /* LWIP_ICMP6 */ + + /* First, free all received pbufs. The individual pbufs need to be released + separately as they have not yet been chained */ + p = ipr->p; + while (p != NULL) { + struct pbuf *pcur; + iprh = (struct ip6_reass_helper *)p->payload; + pcur = p; + /* get the next pointer before freeing */ + p = iprh->next_pbuf; + clen = pbuf_clen(pcur); + LWIP_ASSERT("pbufs_freed + clen <= 0xffff", pbufs_freed + clen <= 0xffff); + pbufs_freed = (u16_t)(pbufs_freed + clen); + pbuf_free(pcur); + } + + /* Then, unchain the struct ip6_reassdata from the list and free it. */ + if (ipr == reassdatagrams) { + reassdatagrams = ipr->next; + } else { + prev = reassdatagrams; + while (prev != NULL) { + if (prev->next == ipr) { + break; + } + prev = prev->next; + } + if (prev != NULL) { + prev->next = ipr->next; + } + } + memp_free(MEMP_IP6_REASSDATA, ipr); + + /* Finally, update number of pbufs in reassembly queue */ + LWIP_ASSERT("ip_reass_pbufcount >= clen", ip6_reass_pbufcount >= pbufs_freed); + ip6_reass_pbufcount = (u16_t)(ip6_reass_pbufcount - pbufs_freed); +} + +#if IP_REASS_FREE_OLDEST +/** + * Free the oldest datagram to make room for enqueueing new fragments. + * The datagram ipr is not freed! + * + * @param ipr ip6_reassdata for the current fragment + * @param pbufs_needed number of pbufs needed to enqueue + * (used for freeing other datagrams if not enough space) + */ +static void +ip6_reass_remove_oldest_datagram(struct ip6_reassdata *ipr, int pbufs_needed) +{ + struct ip6_reassdata *r, *oldest; + + /* Free datagrams until being allowed to enqueue 'pbufs_needed' pbufs, + * but don't free the current datagram! */ + do { + r = oldest = reassdatagrams; + while (r != NULL) { + if (r != ipr) { + if (r->timer <= oldest->timer) { + /* older than the previous oldest */ + oldest = r; + } + } + r = r->next; + } + if (oldest == ipr) { + /* nothing to free, ipr is the only element on the list */ + return; + } + if (oldest != NULL) { + ip6_reass_free_complete_datagram(oldest); + } + } while (((ip6_reass_pbufcount + pbufs_needed) > IP_REASS_MAX_PBUFS) && (reassdatagrams != NULL)); +} +#endif /* IP_REASS_FREE_OLDEST */ + +/** + * Reassembles incoming IPv6 fragments into an IPv6 datagram. + * + * @param p points to the IPv6 Fragment Header + * @return NULL if reassembly is incomplete, pbuf pointing to + * IPv6 Header if reassembly is complete + */ +struct pbuf * +ip6_reass(struct pbuf *p) +{ + struct ip6_reassdata *ipr, *ipr_prev; + struct ip6_reass_helper *iprh, *iprh_tmp, *iprh_prev=NULL; + struct ip6_frag_hdr *frag_hdr; + u16_t offset, len, start, end; + ptrdiff_t hdrdiff; + u16_t clen; + u8_t valid = 1; + struct pbuf *q, *next_pbuf; + + IP6_FRAG_STATS_INC(ip6_frag.recv); + + /* ip6_frag_hdr must be in the first pbuf, not chained. Checked by caller. */ + LWIP_ASSERT("IPv6 fragment header does not fit in first pbuf", + p->len >= sizeof(struct ip6_frag_hdr)); + + frag_hdr = (struct ip6_frag_hdr *) p->payload; + + clen = pbuf_clen(p); + + offset = lwip_ntohs(frag_hdr->_fragment_offset); + + /* Calculate fragment length from IPv6 payload length. + * Adjust for headers before Fragment Header. + * And finally adjust by Fragment Header length. */ + len = lwip_ntohs(ip6_current_header()->_plen); + hdrdiff = (u8_t*)p->payload - (const u8_t*)ip6_current_header(); + LWIP_ASSERT("not a valid pbuf (ip6_input check missing?)", hdrdiff <= 0xFFFF); + LWIP_ASSERT("not a valid pbuf (ip6_input check missing?)", hdrdiff >= IP6_HLEN); + hdrdiff -= IP6_HLEN; + hdrdiff += IP6_FRAG_HLEN; + if (hdrdiff > len) { + IP6_FRAG_STATS_INC(ip6_frag.proterr); + goto nullreturn; + } + len = (u16_t)(len - hdrdiff); + start = (offset & IP6_FRAG_OFFSET_MASK); + if (start > (0xFFFF - len)) { + /* u16_t overflow, cannot handle this */ + IP6_FRAG_STATS_INC(ip6_frag.proterr); + goto nullreturn; + } + + /* Look for the datagram the fragment belongs to in the current datagram queue, + * remembering the previous in the queue for later dequeueing. */ + for (ipr = reassdatagrams, ipr_prev = NULL; ipr != NULL; ipr = ipr->next) { + /* Check if the incoming fragment matches the one currently present + in the reassembly buffer. If so, we proceed with copying the + fragment into the buffer. */ + if ((frag_hdr->_identification == ipr->identification) && + ip6_addr_packed_eq(ip6_current_src_addr(), &(IPV6_FRAG_SRC(ipr)), ipr->src_zone) && + ip6_addr_packed_eq(ip6_current_dest_addr(), &(IPV6_FRAG_DEST(ipr)), ipr->dest_zone)) { + IP6_FRAG_STATS_INC(ip6_frag.cachehit); + break; + } + ipr_prev = ipr; + } + + if (ipr == NULL) { + /* Enqueue a new datagram into the datagram queue */ + ipr = (struct ip6_reassdata *)memp_malloc(MEMP_IP6_REASSDATA); + if (ipr == NULL) { +#if IP_REASS_FREE_OLDEST + /* Make room and try again. */ + ip6_reass_remove_oldest_datagram(ipr, clen); + ipr = (struct ip6_reassdata *)memp_malloc(MEMP_IP6_REASSDATA); + if (ipr != NULL) { + /* re-search ipr_prev since it might have been removed */ + for (ipr_prev = reassdatagrams; ipr_prev != NULL; ipr_prev = ipr_prev->next) { + if (ipr_prev->next == ipr) { + break; + } + } + } else +#endif /* IP_REASS_FREE_OLDEST */ + { + IP6_FRAG_STATS_INC(ip6_frag.memerr); + goto nullreturn; + } + } + + memset(ipr, 0, sizeof(struct ip6_reassdata)); + ipr->timer = IPV6_REASS_MAXAGE; + + /* enqueue the new structure to the front of the list */ + ipr->next = reassdatagrams; + reassdatagrams = ipr; + + /* Use the current IPv6 header for src/dest address reference. + * Eventually, we will replace it when we get the first fragment + * (it might be this one, in any case, it is done later). */ + /* need to use the none-const pointer here: */ + ipr->iphdr = ip_data.current_ip6_header; +#if IPV6_FRAG_COPYHEADER + MEMCPY(&ipr->src, &ip6_current_header()->src, sizeof(ipr->src)); + MEMCPY(&ipr->dest, &ip6_current_header()->dest, sizeof(ipr->dest)); +#endif /* IPV6_FRAG_COPYHEADER */ +#if LWIP_IPV6_SCOPES + /* Also store the address zone information. + * @todo It is possible that due to netif destruction and recreation, the + * stored zones end up resolving to a different interface. In that case, we + * risk sending a "time exceeded" ICMP response over the wrong link. + * Ideally, netif destruction would clean up matching pending reassembly + * structures, but custom zone mappings would make that non-trivial. */ + ipr->src_zone = ip6_addr_zone(ip6_current_src_addr()); + ipr->dest_zone = ip6_addr_zone(ip6_current_dest_addr()); +#endif /* LWIP_IPV6_SCOPES */ + /* copy the fragmented packet id. */ + ipr->identification = frag_hdr->_identification; + + /* copy the nexth field */ + ipr->nexth = frag_hdr->_nexth; + } + + /* Check if we are allowed to enqueue more datagrams. */ + if ((ip6_reass_pbufcount + clen) > IP_REASS_MAX_PBUFS) { +#if IP_REASS_FREE_OLDEST + ip6_reass_remove_oldest_datagram(ipr, clen); + if ((ip6_reass_pbufcount + clen) <= IP_REASS_MAX_PBUFS) { + /* re-search ipr_prev since it might have been removed */ + for (ipr_prev = reassdatagrams; ipr_prev != NULL; ipr_prev = ipr_prev->next) { + if (ipr_prev->next == ipr) { + break; + } + } + } else +#endif /* IP_REASS_FREE_OLDEST */ + { + /* @todo: send ICMPv6 time exceeded here? */ + /* drop this pbuf */ + IP6_FRAG_STATS_INC(ip6_frag.memerr); + goto nullreturn; + } + } + + /* Overwrite Fragment Header with our own helper struct. */ +#if IPV6_FRAG_COPYHEADER + if (IPV6_FRAG_REQROOM > 0) { + /* Make room for struct ip6_reass_helper (only required if sizeof(void*) > 4). + This cannot fail since we already checked when receiving this fragment. */ + u8_t hdrerr = pbuf_header_force(p, IPV6_FRAG_REQROOM); + LWIP_UNUSED_ARG(hdrerr); /* in case of LWIP_NOASSERT */ + LWIP_ASSERT("no room for struct ip6_reass_helper", hdrerr == 0); + } +#else /* IPV6_FRAG_COPYHEADER */ + LWIP_ASSERT("sizeof(struct ip6_reass_helper) <= IP6_FRAG_HLEN, set IPV6_FRAG_COPYHEADER to 1", + sizeof(struct ip6_reass_helper) <= IP6_FRAG_HLEN); +#endif /* IPV6_FRAG_COPYHEADER */ + + /* Prepare the pointer to the helper structure, and its initial values. + * Do not yet write to the structure itself, as we still have to make a + * backup of the original data, and we should not do that until we know for + * sure that we are going to add this packet to the list. */ + iprh = (struct ip6_reass_helper *)p->payload; + next_pbuf = NULL; + end = (u16_t)(start + len); + + /* find the right place to insert this pbuf */ + /* Iterate through until we either get to the end of the list (append), + * or we find on with a larger offset (insert). */ + for (q = ipr->p; q != NULL;) { + iprh_tmp = (struct ip6_reass_helper*)q->payload; + if (start < iprh_tmp->start) { +#if IP_REASS_CHECK_OVERLAP + if (end > iprh_tmp->start) { + /* fragment overlaps with following, throw away */ + IP6_FRAG_STATS_INC(ip6_frag.proterr); + goto nullreturn; + } + if (iprh_prev != NULL) { + if (start < iprh_prev->end) { + /* fragment overlaps with previous, throw away */ + IP6_FRAG_STATS_INC(ip6_frag.proterr); + goto nullreturn; + } + } +#endif /* IP_REASS_CHECK_OVERLAP */ + /* the new pbuf should be inserted before this */ + next_pbuf = q; + if (iprh_prev != NULL) { + /* not the fragment with the lowest offset */ + iprh_prev->next_pbuf = p; + } else { + /* fragment with the lowest offset */ + ipr->p = p; + } + break; + } else if (start == iprh_tmp->start) { + /* received the same datagram twice: no need to keep the datagram */ + goto nullreturn; +#if IP_REASS_CHECK_OVERLAP + } else if (start < iprh_tmp->end) { + /* overlap: no need to keep the new datagram */ + IP6_FRAG_STATS_INC(ip6_frag.proterr); + goto nullreturn; +#endif /* IP_REASS_CHECK_OVERLAP */ + } else { + /* Check if the fragments received so far have no gaps. */ + if (iprh_prev != NULL) { + if (iprh_prev->end != iprh_tmp->start) { + /* There is a fragment missing between the current + * and the previous fragment */ + valid = 0; + } + } + } + q = iprh_tmp->next_pbuf; + iprh_prev = iprh_tmp; + } + + /* If q is NULL, then we made it to the end of the list. Determine what to do now */ + if (q == NULL) { + if (iprh_prev != NULL) { + /* this is (for now), the fragment with the highest offset: + * chain it to the last fragment */ +#if IP_REASS_CHECK_OVERLAP + LWIP_ASSERT("check fragments don't overlap", iprh_prev->end <= start); +#endif /* IP_REASS_CHECK_OVERLAP */ + iprh_prev->next_pbuf = p; + if (iprh_prev->end != start) { + valid = 0; + } + } else { +#if IP_REASS_CHECK_OVERLAP + LWIP_ASSERT("no previous fragment, this must be the first fragment!", + ipr->p == NULL); +#endif /* IP_REASS_CHECK_OVERLAP */ + /* this is the first fragment we ever received for this ip datagram */ + ipr->p = p; + } + } + + /* Track the current number of pbufs current 'in-flight', in order to limit + the number of fragments that may be enqueued at any one time */ + ip6_reass_pbufcount = (u16_t)(ip6_reass_pbufcount + clen); + + /* Remember IPv6 header if this is the first fragment. */ + if (start == 0) { + /* need to use the none-const pointer here: */ + ipr->iphdr = ip_data.current_ip6_header; + /* Make a backup of the part of the packet data that we are about to + * overwrite, so that we can restore the original later. */ + MEMCPY(ipr->orig_hdr, p->payload, sizeof(*iprh)); + /* For IPV6_FRAG_COPYHEADER there is no need to copy src/dst again, as they + * will be the same as they were. With LWIP_IPV6_SCOPES, the same applies + * to the source/destination zones. */ + } + /* Only after the backup do we get to fill in the actual helper structure. */ + iprh->next_pbuf = next_pbuf; + iprh->start = start; + iprh->end = end; + + /* If this is the last fragment, calculate total packet length. */ + if ((offset & IP6_FRAG_MORE_FLAG) == 0) { + ipr->datagram_len = iprh->end; + } + + /* Additional validity tests: we have received first and last fragment. */ + iprh_tmp = (struct ip6_reass_helper*)ipr->p->payload; + if (iprh_tmp->start != 0) { + valid = 0; + } + if (ipr->datagram_len == 0) { + valid = 0; + } + + /* Final validity test: no gaps between current and last fragment. */ + iprh_prev = iprh; + q = iprh->next_pbuf; + while ((q != NULL) && valid) { + iprh = (struct ip6_reass_helper*)q->payload; + if (iprh_prev->end != iprh->start) { + valid = 0; + break; + } + iprh_prev = iprh; + q = iprh->next_pbuf; + } + + if (valid) { + /* All fragments have been received */ + struct ip6_hdr* iphdr_ptr; + + /* chain together the pbufs contained within the ip6_reassdata list. */ + iprh = (struct ip6_reass_helper*) ipr->p->payload; + while (iprh != NULL) { + next_pbuf = iprh->next_pbuf; + if (next_pbuf != NULL) { + /* Save next helper struct (will be hidden in next step). */ + iprh_tmp = (struct ip6_reass_helper*)next_pbuf->payload; + + /* hide the fragment header for every succeeding fragment */ + pbuf_remove_header(next_pbuf, IP6_FRAG_HLEN); +#if IPV6_FRAG_COPYHEADER + if (IPV6_FRAG_REQROOM > 0) { + /* hide the extra bytes borrowed from ip6_hdr for struct ip6_reass_helper */ + u8_t hdrerr = pbuf_remove_header(next_pbuf, IPV6_FRAG_REQROOM); + LWIP_UNUSED_ARG(hdrerr); /* in case of LWIP_NOASSERT */ + LWIP_ASSERT("no room for struct ip6_reass_helper", hdrerr == 0); + } +#endif + pbuf_cat(ipr->p, next_pbuf); + } + else { + iprh_tmp = NULL; + } + + iprh = iprh_tmp; + } + + /* Get the first pbuf. */ + p = ipr->p; + +#if IPV6_FRAG_COPYHEADER + if (IPV6_FRAG_REQROOM > 0) { + u8_t hdrerr; + /* Restore (only) the bytes that we overwrote beyond the fragment header. + * Those bytes may belong to either the IPv6 header or an extension + * header placed before the fragment header. */ + MEMCPY(p->payload, ipr->orig_hdr, IPV6_FRAG_REQROOM); + /* get back room for struct ip6_reass_helper (only required if sizeof(void*) > 4) */ + hdrerr = pbuf_remove_header(p, IPV6_FRAG_REQROOM); + LWIP_UNUSED_ARG(hdrerr); /* in case of LWIP_NOASSERT */ + LWIP_ASSERT("no room for struct ip6_reass_helper", hdrerr == 0); + } +#endif + + /* We need to get rid of the fragment header itself, which is somewhere in + * the middle of the packet (but still in the first pbuf of the chain). + * Getting rid of the header is required by RFC 2460 Sec. 4.5 and necessary + * in order to be able to reassemble packets that are close to full size + * (i.e., around 65535 bytes). We simply move up all the headers before the + * fragment header, including the IPv6 header, and adjust the payload start + * accordingly. This works because all these headers are in the first pbuf + * of the chain, and because the caller adjusts all its pointers on + * successful reassembly. */ + MEMMOVE((u8_t*)ipr->iphdr + sizeof(struct ip6_frag_hdr), ipr->iphdr, + (size_t)((u8_t*)p->payload - (u8_t*)ipr->iphdr)); + + /* This is where the IPv6 header is now. */ + iphdr_ptr = (struct ip6_hdr*)((u8_t*)ipr->iphdr + + sizeof(struct ip6_frag_hdr)); + + /* Adjust datagram length by adding header lengths. */ + ipr->datagram_len = (u16_t)(ipr->datagram_len + ((u8_t*)p->payload - (u8_t*)iphdr_ptr) + - IP6_HLEN); + + /* Set payload length in ip header. */ + iphdr_ptr->_plen = lwip_htons(ipr->datagram_len); + + /* With the fragment header gone, we now need to adjust the next-header + * field of whatever header was originally before it. Since the packet made + * it through the original header processing routines at least up to the + * fragment header, we do not need any further sanity checks here. */ + if (IP6H_NEXTH(iphdr_ptr) == IP6_NEXTH_FRAGMENT) { + iphdr_ptr->_nexth = ipr->nexth; + } else { + u8_t *ptr = (u8_t *)iphdr_ptr + IP6_HLEN; + while (*ptr != IP6_NEXTH_FRAGMENT) { + ptr += 8 * (1 + ptr[1]); + } + *ptr = ipr->nexth; + } + + /* release the resources allocated for the fragment queue entry */ + if (reassdatagrams == ipr) { + /* it was the first in the list */ + reassdatagrams = ipr->next; + } else { + /* it wasn't the first, so it must have a valid 'prev' */ + LWIP_ASSERT("sanity check linked list", ipr_prev != NULL); + ipr_prev->next = ipr->next; + } + memp_free(MEMP_IP6_REASSDATA, ipr); + + /* adjust the number of pbufs currently queued for reassembly. */ + clen = pbuf_clen(p); + LWIP_ASSERT("ip6_reass_pbufcount >= clen", ip6_reass_pbufcount >= clen); + ip6_reass_pbufcount = (u16_t)(ip6_reass_pbufcount - clen); + + /* Move pbuf back to IPv6 header. This should never fail. */ + if (pbuf_header_force(p, (s16_t)((u8_t*)p->payload - (u8_t*)iphdr_ptr))) { + LWIP_ASSERT("ip6_reass: moving p->payload to ip6 header failed", 0); + pbuf_free(p); + return NULL; + } + + /* Return the pbuf chain */ + return p; + } + /* the datagram is not (yet?) reassembled completely */ + return NULL; + +nullreturn: + IP6_FRAG_STATS_INC(ip6_frag.drop); + pbuf_free(p); + return NULL; +} + +#endif /* LWIP_IPV6 && LWIP_IPV6_REASS */ + +#if LWIP_IPV6 && LWIP_IPV6_FRAG + +#if !LWIP_NETIF_TX_SINGLE_PBUF +/** Allocate a new struct pbuf_custom_ref */ +static struct pbuf_custom_ref* +ip6_frag_alloc_pbuf_custom_ref(void) +{ + return (struct pbuf_custom_ref*)memp_malloc(MEMP_FRAG_PBUF); +} + +/** Free a struct pbuf_custom_ref */ +static void +ip6_frag_free_pbuf_custom_ref(struct pbuf_custom_ref* p) +{ + LWIP_ASSERT("p != NULL", p != NULL); + memp_free(MEMP_FRAG_PBUF, p); +} + +/** Free-callback function to free a 'struct pbuf_custom_ref', called by + * pbuf_free. */ +static void +ip6_frag_free_pbuf_custom(struct pbuf *p) +{ + struct pbuf_custom_ref *pcr = (struct pbuf_custom_ref*)p; + LWIP_ASSERT("pcr != NULL", pcr != NULL); + LWIP_ASSERT("pcr == p", (void*)pcr == (void*)p); + if (pcr->original != NULL) { + pbuf_free(pcr->original); + } + ip6_frag_free_pbuf_custom_ref(pcr); +} +#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */ + +/** + * Fragment an IPv6 datagram if too large for the netif or path MTU. + * + * Chop the datagram in MTU sized chunks and send them in order + * by pointing PBUF_REFs into p + * + * @param p ipv6 packet to send + * @param netif the netif on which to send + * @param dest destination ipv6 address to which to send + * + * @return ERR_OK if sent successfully, err_t otherwise + */ +err_t +ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest) +{ + struct ip6_hdr *original_ip6hdr; + struct ip6_hdr *ip6hdr; + struct ip6_frag_hdr *frag_hdr; + struct pbuf *rambuf; +#if !LWIP_NETIF_TX_SINGLE_PBUF + struct pbuf *newpbuf; + u16_t newpbuflen = 0; + u16_t left_to_copy; +#endif + static u32_t identification; + u16_t left, cop; + const u16_t mtu = nd6_get_destination_mtu(dest, netif); + const u16_t nfb = (u16_t)((mtu - (IP6_HLEN + IP6_FRAG_HLEN)) & IP6_FRAG_OFFSET_MASK); + u16_t fragment_offset = 0; + u16_t last; + u16_t poff = IP6_HLEN; + + identification++; + + original_ip6hdr = (struct ip6_hdr *)p->payload; + + /* @todo we assume there are no options in the unfragmentable part (IPv6 header). */ + LWIP_ASSERT("p->tot_len >= IP6_HLEN", p->tot_len >= IP6_HLEN); + left = (u16_t)(p->tot_len - IP6_HLEN); + + while (left) { + last = (left <= nfb); + + /* Fill this fragment */ + cop = last ? left : nfb; + +#if LWIP_NETIF_TX_SINGLE_PBUF + rambuf = pbuf_alloc(PBUF_IP, cop + IP6_FRAG_HLEN, PBUF_RAM); + if (rambuf == NULL) { + IP6_FRAG_STATS_INC(ip6_frag.memerr); + return ERR_MEM; + } + LWIP_ASSERT("this needs a pbuf in one piece!", + (rambuf->len == rambuf->tot_len) && (rambuf->next == NULL)); + poff += pbuf_copy_partial(p, (u8_t*)rambuf->payload + IP6_FRAG_HLEN, cop, poff); + /* make room for the IP header */ + if (pbuf_add_header(rambuf, IP6_HLEN)) { + pbuf_free(rambuf); + IP6_FRAG_STATS_INC(ip6_frag.memerr); + return ERR_MEM; + } + /* fill in the IP header */ + SMEMCPY(rambuf->payload, original_ip6hdr, IP6_HLEN); + ip6hdr = (struct ip6_hdr *)rambuf->payload; + frag_hdr = (struct ip6_frag_hdr *)((u8_t*)rambuf->payload + IP6_HLEN); +#else + /* When not using a static buffer, create a chain of pbufs. + * The first will be a PBUF_RAM holding the link, IPv6, and Fragment header. + * The rest will be PBUF_REFs mirroring the pbuf chain to be fragged, + * but limited to the size of an mtu. + */ + rambuf = pbuf_alloc(PBUF_LINK, IP6_HLEN + IP6_FRAG_HLEN, PBUF_RAM); + if (rambuf == NULL) { + IP6_FRAG_STATS_INC(ip6_frag.memerr); + return ERR_MEM; + } + LWIP_ASSERT("this needs a pbuf in one piece!", + (rambuf->len >= (IP6_HLEN))); + SMEMCPY(rambuf->payload, original_ip6hdr, IP6_HLEN); + ip6hdr = (struct ip6_hdr *)rambuf->payload; + frag_hdr = (struct ip6_frag_hdr *)((u8_t*)rambuf->payload + IP6_HLEN); + + /* Can just adjust p directly for needed offset. */ + p->payload = (u8_t *)p->payload + poff; + p->len = (u16_t)(p->len - poff); + p->tot_len = (u16_t)(p->tot_len - poff); + + left_to_copy = cop; + while (left_to_copy) { + struct pbuf_custom_ref *pcr; + newpbuflen = (left_to_copy < p->len) ? left_to_copy : p->len; + /* Is this pbuf already empty? */ + if (!newpbuflen) { + p = p->next; + continue; + } + pcr = ip6_frag_alloc_pbuf_custom_ref(); + if (pcr == NULL) { + pbuf_free(rambuf); + IP6_FRAG_STATS_INC(ip6_frag.memerr); + return ERR_MEM; + } + /* Mirror this pbuf, although we might not need all of it. */ + newpbuf = pbuf_alloced_custom(PBUF_RAW, newpbuflen, PBUF_REF, &pcr->pc, p->payload, newpbuflen); + if (newpbuf == NULL) { + ip6_frag_free_pbuf_custom_ref(pcr); + pbuf_free(rambuf); + IP6_FRAG_STATS_INC(ip6_frag.memerr); + return ERR_MEM; + } + pbuf_ref(p); + pcr->original = p; + pcr->pc.custom_free_function = ip6_frag_free_pbuf_custom; + + /* Add it to end of rambuf's chain, but using pbuf_cat, not pbuf_chain + * so that it is removed when pbuf_dechain is later called on rambuf. + */ + pbuf_cat(rambuf, newpbuf); + left_to_copy = (u16_t)(left_to_copy - newpbuflen); + if (left_to_copy) { + p = p->next; + } + } + poff = newpbuflen; +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + + /* Set headers */ + frag_hdr->_nexth = original_ip6hdr->_nexth; + frag_hdr->reserved = 0; + frag_hdr->_fragment_offset = lwip_htons((u16_t)((fragment_offset & IP6_FRAG_OFFSET_MASK) | (last ? 0 : IP6_FRAG_MORE_FLAG))); + frag_hdr->_identification = lwip_htonl(identification); + + IP6H_NEXTH_SET(ip6hdr, IP6_NEXTH_FRAGMENT); + IP6H_PLEN_SET(ip6hdr, (u16_t)(cop + IP6_FRAG_HLEN)); + + /* No need for separate header pbuf - we allowed room for it in rambuf + * when allocated. + */ + IP6_FRAG_STATS_INC(ip6_frag.xmit); + netif->output_ip6(netif, rambuf, dest); + + /* Unfortunately we can't reuse rambuf - the hardware may still be + * using the buffer. Instead we free it (and the ensuing chain) and + * recreate it next time round the loop. If we're lucky the hardware + * will have already sent the packet, the free will really free, and + * there will be zero memory penalty. + */ + + pbuf_free(rambuf); + left = (u16_t)(left - cop); + fragment_offset = (u16_t)(fragment_offset + cop); + } + return ERR_OK; +} + +#endif /* LWIP_IPV6 && LWIP_IPV6_FRAG */ diff --git a/lib/lwip/core/ipv6/mld6.c b/lib/lwip/core/ipv6/mld6.c new file mode 100644 index 0000000000..ac4fb01249 --- /dev/null +++ b/lib/lwip/core/ipv6/mld6.c @@ -0,0 +1,626 @@ +/** + * @file + * Multicast listener discovery + * + * @defgroup mld6 MLD6 + * @ingroup ip6 + * Multicast listener discovery for IPv6. Aims to be compliant with RFC 2710. + * No support for MLDv2.<br> + * Note: The allnodes (ff01::1, ff02::1) group is assumed be received by your + * netif since it must always be received for correct IPv6 operation (e.g. SLAAC). + * Ensure the netif filters are configured accordingly!<br> + * The netif flags also need NETIF_FLAG_MLD6 flag set to enable MLD6 on a + * netif ("netif->flags |= NETIF_FLAG_MLD6;").<br> + * To be called from TCPIP thread. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +/* Based on igmp.c implementation of igmp v2 protocol */ + +#include "lwip/opt.h" + +#if LWIP_IPV6 && LWIP_IPV6_MLD /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/mld6.h" +#include "lwip/prot/mld6.h" +#include "lwip/icmp6.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/ip.h" +#include "lwip/inet_chksum.h" +#include "lwip/pbuf.h" +#include "lwip/netif.h" +#include "lwip/memp.h" +#include "lwip/stats.h" + +#include <string.h> + + +/* + * MLD constants + */ +#define MLD6_HL 1 +#define MLD6_JOIN_DELAYING_MEMBER_TMR_MS (500) + +#define MLD6_GROUP_NON_MEMBER 0 +#define MLD6_GROUP_DELAYING_MEMBER 1 +#define MLD6_GROUP_IDLE_MEMBER 2 + +/* Forward declarations. */ +static struct mld_group *mld6_new_group(struct netif *ifp, const ip6_addr_t *addr); +static err_t mld6_remove_group(struct netif *netif, struct mld_group *group); +static void mld6_delayed_report(struct mld_group *group, u16_t maxresp); +static void mld6_send(struct netif *netif, struct mld_group *group, u8_t type); + + +/** + * Stop MLD processing on interface + * + * @param netif network interface on which stop MLD processing + */ +err_t +mld6_stop(struct netif *netif) +{ + struct mld_group *group = netif_mld6_data(netif); + + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6, NULL); + + while (group != NULL) { + struct mld_group *next = group->next; /* avoid use-after-free below */ + + /* disable the group at the MAC level */ + if (netif->mld_mac_filter != NULL) { + netif->mld_mac_filter(netif, &(group->group_address), NETIF_DEL_MAC_FILTER); + } + + /* free group */ + memp_free(MEMP_MLD6_GROUP, group); + + /* move to "next" */ + group = next; + } + return ERR_OK; +} + +/** + * Report MLD memberships for this interface + * + * @param netif network interface on which report MLD memberships + */ +void +mld6_report_groups(struct netif *netif) +{ + struct mld_group *group = netif_mld6_data(netif); + + while (group != NULL) { + mld6_delayed_report(group, MLD6_JOIN_DELAYING_MEMBER_TMR_MS); + group = group->next; + } +} + +/** + * Search for a group that is joined on a netif + * + * @param ifp the network interface for which to look + * @param addr the group ipv6 address to search for + * @return a struct mld_group* if the group has been found, + * NULL if the group wasn't found. + */ +struct mld_group * +mld6_lookfor_group(struct netif *ifp, const ip6_addr_t *addr) +{ + struct mld_group *group = netif_mld6_data(ifp); + + while (group != NULL) { + if (ip6_addr_eq(&(group->group_address), addr)) { + return group; + } + group = group->next; + } + + return NULL; +} + + +/** + * create a new group + * + * @param ifp the network interface for which to create + * @param addr the new group ipv6 + * @return a struct mld_group*, + * NULL on memory error. + */ +static struct mld_group * +mld6_new_group(struct netif *ifp, const ip6_addr_t *addr) +{ + struct mld_group *group; + + group = (struct mld_group *)memp_malloc(MEMP_MLD6_GROUP); + if (group != NULL) { + ip6_addr_set(&(group->group_address), addr); + group->timer = 0; /* Not running */ + group->group_state = MLD6_GROUP_IDLE_MEMBER; + group->last_reporter_flag = 0; + group->use = 0; + group->next = netif_mld6_data(ifp); + + netif_set_client_data(ifp, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6, group); + } + + return group; +} + +/** + * Remove a group from the mld_group_list, but do not free it yet + * + * @param group the group to remove + * @return ERR_OK if group was removed from the list, an err_t otherwise + */ +static err_t +mld6_remove_group(struct netif *netif, struct mld_group *group) +{ + err_t err = ERR_OK; + + /* Is it the first group? */ + if (netif_mld6_data(netif) == group) { + netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6, group->next); + } else { + /* look for group further down the list */ + struct mld_group *tmpGroup; + for (tmpGroup = netif_mld6_data(netif); tmpGroup != NULL; tmpGroup = tmpGroup->next) { + if (tmpGroup->next == group) { + tmpGroup->next = group->next; + break; + } + } + /* Group not find group */ + if (tmpGroup == NULL) { + err = ERR_ARG; + } + } + + return err; +} + + +/** + * Process an input MLD message. Called by icmp6_input. + * + * @param p the mld packet, p->payload pointing to the icmpv6 header + * @param inp the netif on which this packet was received + */ +void +mld6_input(struct pbuf *p, struct netif *inp) +{ + struct mld_header *mld_hdr; + struct mld_group *group; + + MLD6_STATS_INC(mld6.recv); + + /* Check that mld header fits in packet. */ + if (p->len < sizeof(struct mld_header)) { + /* @todo debug message */ + pbuf_free(p); + MLD6_STATS_INC(mld6.lenerr); + MLD6_STATS_INC(mld6.drop); + return; + } + + mld_hdr = (struct mld_header *)p->payload; + + switch (mld_hdr->type) { + case ICMP6_TYPE_MLQ: /* Multicast listener query. */ + /* Is it a general query? */ + if (ip6_addr_isallnodes_linklocal(ip6_current_dest_addr()) && + ip6_addr_isany(&(mld_hdr->multicast_address))) { + MLD6_STATS_INC(mld6.rx_general); + /* Report all groups, except all nodes group, and if-local groups. */ + group = netif_mld6_data(inp); + while (group != NULL) { + if ((!(ip6_addr_ismulticast_iflocal(&(group->group_address)))) && + (!(ip6_addr_isallnodes_linklocal(&(group->group_address))))) { + mld6_delayed_report(group, lwip_ntohs(mld_hdr->max_resp_delay)); + } + group = group->next; + } + } else { + /* Have we joined this group? + * We use IP6 destination address to have a memory aligned copy. + * mld_hdr->multicast_address should be the same. */ + MLD6_STATS_INC(mld6.rx_group); + group = mld6_lookfor_group(inp, ip6_current_dest_addr()); + if (group != NULL) { + /* Schedule a report. */ + mld6_delayed_report(group, lwip_ntohs(mld_hdr->max_resp_delay)); + } + } + break; /* ICMP6_TYPE_MLQ */ + case ICMP6_TYPE_MLR: /* Multicast listener report. */ + /* Have we joined this group? + * We use IP6 destination address to have a memory aligned copy. + * mld_hdr->multicast_address should be the same. */ + MLD6_STATS_INC(mld6.rx_report); + group = mld6_lookfor_group(inp, ip6_current_dest_addr()); + if (group != NULL) { + /* If we are waiting to report, cancel it. */ + if (group->group_state == MLD6_GROUP_DELAYING_MEMBER) { + group->timer = 0; /* stopped */ + group->group_state = MLD6_GROUP_IDLE_MEMBER; + group->last_reporter_flag = 0; + } + } + break; /* ICMP6_TYPE_MLR */ + case ICMP6_TYPE_MLD: /* Multicast listener done. */ + /* Do nothing, router will query us. */ + break; /* ICMP6_TYPE_MLD */ + default: + MLD6_STATS_INC(mld6.proterr); + MLD6_STATS_INC(mld6.drop); + break; + } + + pbuf_free(p); +} + +/** + * @ingroup mld6 + * Join a group on one or all network interfaces. + * + * If the group is to be joined on all interfaces, the given group address must + * not have a zone set (i.e., it must have its zone index set to IP6_NO_ZONE). + * If the group is to be joined on one particular interface, the given group + * address may or may not have a zone set. + * + * @param srcaddr ipv6 address (zoned) of the network interface which should + * join a new group. If IP6_ADDR_ANY6, join on all netifs + * @param groupaddr the ipv6 address of the group to join (possibly but not + * necessarily zoned) + * @return ERR_OK if group was joined on the netif(s), an err_t otherwise + */ +err_t +mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr) +{ + err_t err = ERR_VAL; /* no matching interface */ + struct netif *netif; + + LWIP_ASSERT_CORE_LOCKED(); + + /* loop through netif's */ + NETIF_FOREACH(netif) { + /* Should we join this interface ? */ + if (ip6_addr_isany(srcaddr) || + netif_get_ip6_addr_match(netif, srcaddr) >= 0) { + err = mld6_joingroup_netif(netif, groupaddr); + if (err != ERR_OK) { + return err; + } + } + } + + return err; +} + +/** + * @ingroup mld6 + * Join a group on a network interface. + * + * @param netif the network interface which should join a new group. + * @param groupaddr the ipv6 address of the group to join (possibly but not + * necessarily zoned) + * @return ERR_OK if group was joined on the netif, an err_t otherwise + */ +err_t +mld6_joingroup_netif(struct netif *netif, const ip6_addr_t *groupaddr) +{ + struct mld_group *group; +#if LWIP_IPV6_SCOPES + ip6_addr_t ip6addr; + + /* If the address has a particular scope but no zone set, use the netif to + * set one now. Within the mld6 module, all addresses are properly zoned. */ + if (ip6_addr_lacks_zone(groupaddr, IP6_MULTICAST)) { + ip6_addr_set(&ip6addr, groupaddr); + ip6_addr_assign_zone(&ip6addr, IP6_MULTICAST, netif); + groupaddr = &ip6addr; + } + IP6_ADDR_ZONECHECK_NETIF(groupaddr, netif); +#endif /* LWIP_IPV6_SCOPES */ + + LWIP_ASSERT_CORE_LOCKED(); + + /* find group or create a new one if not found */ + group = mld6_lookfor_group(netif, groupaddr); + + if (group == NULL) { + /* Joining a new group. Create a new group entry. */ + group = mld6_new_group(netif, groupaddr); + if (group == NULL) { + return ERR_MEM; + } + + /* Activate this address on the MAC layer. */ + if (netif->mld_mac_filter != NULL) { + netif->mld_mac_filter(netif, groupaddr, NETIF_ADD_MAC_FILTER); + } + + /* Report our membership. */ + MLD6_STATS_INC(mld6.tx_report); + mld6_send(netif, group, ICMP6_TYPE_MLR); + mld6_delayed_report(group, MLD6_JOIN_DELAYING_MEMBER_TMR_MS); + } + + /* Increment group use */ + group->use++; + return ERR_OK; +} + +/** + * @ingroup mld6 + * Leave a group on a network interface. + * + * Zoning of address follows the same rules as @ref mld6_joingroup. + * + * @param srcaddr ipv6 address (zoned) of the network interface which should + * leave the group. If IP6_ADDR_ANY6, leave on all netifs + * @param groupaddr the ipv6 address of the group to leave (possibly, but not + * necessarily zoned) + * @return ERR_OK if group was left on the netif(s), an err_t otherwise + */ +err_t +mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr) +{ + err_t err = ERR_VAL; /* no matching interface */ + struct netif *netif; + + LWIP_ASSERT_CORE_LOCKED(); + + /* loop through netif's */ + NETIF_FOREACH(netif) { + /* Should we leave this interface ? */ + if (ip6_addr_isany(srcaddr) || + netif_get_ip6_addr_match(netif, srcaddr) >= 0) { + err_t res = mld6_leavegroup_netif(netif, groupaddr); + if (err != ERR_OK) { + /* Store this result if we have not yet gotten a success */ + err = res; + } + } + } + + return err; +} + +/** + * @ingroup mld6 + * Leave a group on a network interface. + * + * @param netif the network interface which should leave the group. + * @param groupaddr the ipv6 address of the group to leave (possibly, but not + * necessarily zoned) + * @return ERR_OK if group was left on the netif, an err_t otherwise + */ +err_t +mld6_leavegroup_netif(struct netif *netif, const ip6_addr_t *groupaddr) +{ + struct mld_group *group; +#if LWIP_IPV6_SCOPES + ip6_addr_t ip6addr; + + if (ip6_addr_lacks_zone(groupaddr, IP6_MULTICAST)) { + ip6_addr_set(&ip6addr, groupaddr); + ip6_addr_assign_zone(&ip6addr, IP6_MULTICAST, netif); + groupaddr = &ip6addr; + } + IP6_ADDR_ZONECHECK_NETIF(groupaddr, netif); +#endif /* LWIP_IPV6_SCOPES */ + + LWIP_ASSERT_CORE_LOCKED(); + + /* find group */ + group = mld6_lookfor_group(netif, groupaddr); + + if (group != NULL) { + /* Leave if there is no other use of the group */ + if (group->use <= 1) { + /* Remove the group from the list */ + mld6_remove_group(netif, group); + + /* If we are the last reporter for this group */ + if (group->last_reporter_flag) { + MLD6_STATS_INC(mld6.tx_leave); + mld6_send(netif, group, ICMP6_TYPE_MLD); + } + + /* Disable the group at the MAC level */ + if (netif->mld_mac_filter != NULL) { + netif->mld_mac_filter(netif, groupaddr, NETIF_DEL_MAC_FILTER); + } + + /* free group struct */ + memp_free(MEMP_MLD6_GROUP, group); + } else { + /* Decrement group use */ + group->use--; + } + + /* Left group */ + return ERR_OK; + } + + /* Group not found */ + return ERR_VAL; +} + + +/** + * Periodic timer for mld processing. Must be called every + * MLD6_TMR_INTERVAL milliseconds (100). + * + * When a delaying member expires, a membership report is sent. + */ +void +mld6_tmr(void) +{ + struct netif *netif; + + NETIF_FOREACH(netif) { + struct mld_group *group = netif_mld6_data(netif); + + while (group != NULL) { + if (group->timer > 0) { + group->timer--; + if (group->timer == 0) { + /* If the state is MLD6_GROUP_DELAYING_MEMBER then we send a report for this group */ + if (group->group_state == MLD6_GROUP_DELAYING_MEMBER) { + MLD6_STATS_INC(mld6.tx_report); + mld6_send(netif, group, ICMP6_TYPE_MLR); + group->group_state = MLD6_GROUP_IDLE_MEMBER; + } + } + } + group = group->next; + } + } +} + +/** + * Schedule a delayed membership report for a group + * + * @param group the mld_group for which "delaying" membership report + * should be sent + * @param maxresp_in the max resp delay provided in the query + */ +static void +mld6_delayed_report(struct mld_group *group, u16_t maxresp_in) +{ + /* Convert maxresp from milliseconds to tmr ticks */ + u16_t maxresp = maxresp_in / MLD6_TMR_INTERVAL; + if (maxresp == 0) { + maxresp = 1; + } + +#ifdef LWIP_RAND + /* Randomize maxresp. (if LWIP_RAND is supported) */ + maxresp = (u16_t)(LWIP_RAND() % maxresp); + if (maxresp == 0) { + maxresp = 1; + } +#endif /* LWIP_RAND */ + + /* Apply timer value if no report has been scheduled already. */ + if ((group->group_state == MLD6_GROUP_IDLE_MEMBER) || + ((group->group_state == MLD6_GROUP_DELAYING_MEMBER) && + ((group->timer == 0) || (maxresp < group->timer)))) { + group->timer = maxresp; + group->group_state = MLD6_GROUP_DELAYING_MEMBER; + } +} + +/** + * Send a MLD message (report or done). + * + * An IPv6 hop-by-hop options header with a router alert option + * is prepended. + * + * @param group the group to report or quit + * @param type ICMP6_TYPE_MLR (report) or ICMP6_TYPE_MLD (done) + */ +static void +mld6_send(struct netif *netif, struct mld_group *group, u8_t type) +{ + struct mld_header *mld_hdr; + struct pbuf *p; + const ip6_addr_t *src_addr; + + /* Allocate a packet. Size is MLD header + IPv6 Hop-by-hop options header. */ + p = pbuf_alloc(PBUF_IP, sizeof(struct mld_header) + MLD6_HBH_HLEN, PBUF_RAM); + if (p == NULL) { + MLD6_STATS_INC(mld6.memerr); + return; + } + + /* Move to make room for Hop-by-hop options header. */ + if (pbuf_remove_header(p, MLD6_HBH_HLEN)) { + pbuf_free(p); + MLD6_STATS_INC(mld6.lenerr); + return; + } + + /* Select our source address. */ + if (!ip6_addr_isvalid(netif_ip6_addr_state(netif, 0))) { + /* This is a special case, when we are performing duplicate address detection. + * We must join the multicast group, but we don't have a valid address yet. */ + src_addr = IP6_ADDR_ANY6; + } else { + /* Use link-local address as source address. */ + src_addr = netif_ip6_addr(netif, 0); + } + + /* MLD message header pointer. */ + mld_hdr = (struct mld_header *)p->payload; + + /* Set fields. */ + mld_hdr->type = type; + mld_hdr->code = 0; + mld_hdr->chksum = 0; + mld_hdr->max_resp_delay = 0; + mld_hdr->reserved = 0; + ip6_addr_copy_to_packed(mld_hdr->multicast_address, group->group_address); + +#if CHECKSUM_GEN_ICMP6 + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP6) { + mld_hdr->chksum = ip6_chksum_pseudo(p, IP6_NEXTH_ICMP6, p->len, + src_addr, &(group->group_address)); + } +#endif /* CHECKSUM_GEN_ICMP6 */ + + /* Add hop-by-hop headers options: router alert with MLD value. */ + ip6_options_add_hbh_ra(p, IP6_NEXTH_ICMP6, IP6_ROUTER_ALERT_VALUE_MLD); + + if (type == ICMP6_TYPE_MLR) { + /* Remember we were the last to report */ + group->last_reporter_flag = 1; + } + + /* Send the packet out. */ + MLD6_STATS_INC(mld6.xmit); + ip6_output_if(p, (ip6_addr_isany(src_addr)) ? NULL : src_addr, &(group->group_address), + MLD6_HL, 0, IP6_NEXTH_HOPBYHOP, netif); + pbuf_free(p); +} + +#endif /* LWIP_IPV6 */ diff --git a/lib/lwip/core/ipv6/nd6.c b/lib/lwip/core/ipv6/nd6.c new file mode 100644 index 0000000000..3b13c21ec6 --- /dev/null +++ b/lib/lwip/core/ipv6/nd6.c @@ -0,0 +1,2474 @@ +/** + * @file + * + * Neighbor discovery and stateless address autoconfiguration for IPv6. + * Aims to be compliant with RFC 4861 (Neighbor discovery) and RFC 4862 + * (Address autoconfiguration). + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#include "lwip/opt.h" + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/nd6.h" +#include "lwip/priv/nd6_priv.h" +#include "lwip/prot/nd6.h" +#include "lwip/prot/icmp6.h" +#include "lwip/pbuf.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/inet_chksum.h" +#include "lwip/netif.h" +#include "lwip/icmp6.h" +#include "lwip/mld6.h" +#include "lwip/dhcp6.h" +#include "lwip/ip.h" +#include "lwip/stats.h" +#include "lwip/dns.h" + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +#if LWIP_IPV6_DUP_DETECT_ATTEMPTS > IP6_ADDR_TENTATIVE_COUNT_MASK +#error LWIP_IPV6_DUP_DETECT_ATTEMPTS > IP6_ADDR_TENTATIVE_COUNT_MASK +#endif +#if LWIP_ND6_NUM_NEIGHBORS > 127 +#error LWIP_ND6_NUM_NEIGHBORS must fit into an s8_t (max value: 127) +#endif +#if LWIP_ND6_NUM_DESTINATIONS > 32767 +#error LWIP_ND6_NUM_DESTINATIONS must fit into an s16_t (max value: 32767) +#endif +#if LWIP_ND6_NUM_PREFIXES > 127 +#error LWIP_ND6_NUM_PREFIXES must fit into an s8_t (max value: 127) +#endif +#if LWIP_ND6_NUM_ROUTERS > 127 +#error LWIP_ND6_NUM_ROUTERS must fit into an s8_t (max value: 127) +#endif + +/* Router tables. */ +struct nd6_neighbor_cache_entry neighbor_cache[LWIP_ND6_NUM_NEIGHBORS]; +struct nd6_destination_cache_entry destination_cache[LWIP_ND6_NUM_DESTINATIONS]; +struct nd6_prefix_list_entry prefix_list[LWIP_ND6_NUM_PREFIXES]; +struct nd6_router_list_entry default_router_list[LWIP_ND6_NUM_ROUTERS]; + +/* Default values, can be updated by a RA message. */ +u32_t reachable_time = LWIP_ND6_REACHABLE_TIME; +u32_t retrans_timer = LWIP_ND6_RETRANS_TIMER; /* @todo implement this value in timer */ + +#if LWIP_ND6_QUEUEING +static u8_t nd6_queue_size = 0; +#endif + +/* Index for cache entries. */ +static netif_addr_idx_t nd6_cached_destination_index; + +/* Multicast address holder. */ +static ip6_addr_t multicast_address; + +static u8_t nd6_tmr_rs_reduction; + +/* Static buffer to parse RA packet options */ +union ra_options { + struct lladdr_option lladdr; + struct mtu_option mtu; + struct prefix_option prefix; +#if LWIP_ND6_RDNSS_MAX_DNS_SERVERS + struct rdnss_option rdnss; +#endif +}; +static union ra_options nd6_ra_buffer; + +/* Forward declarations. */ +static s8_t nd6_find_neighbor_cache_entry(const ip6_addr_t *ip6addr); +static s8_t nd6_new_neighbor_cache_entry(void); +static void nd6_free_neighbor_cache_entry(s8_t i); +static s16_t nd6_find_destination_cache_entry(const ip6_addr_t *ip6addr); +static s16_t nd6_new_destination_cache_entry(void); +static int nd6_is_prefix_in_netif(const ip6_addr_t *ip6addr, struct netif *netif); +static s8_t nd6_select_router(const ip6_addr_t *ip6addr, struct netif *netif); +static s8_t nd6_get_router(const ip6_addr_t *router_addr, struct netif *netif); +static s8_t nd6_new_router(const ip6_addr_t *router_addr, struct netif *netif); +static s8_t nd6_get_onlink_prefix(const ip6_addr_t *prefix, struct netif *netif); +static s8_t nd6_new_onlink_prefix(const ip6_addr_t *prefix, struct netif *netif); +static s8_t nd6_get_next_hop_entry(const ip6_addr_t *ip6addr, struct netif *netif); +static err_t nd6_queue_packet(s8_t neighbor_index, struct pbuf *q); + +#define ND6_SEND_FLAG_MULTICAST_DEST 0x01 +#define ND6_SEND_FLAG_ALLNODES_DEST 0x02 +#define ND6_SEND_FLAG_ANY_SRC 0x04 +static void nd6_send_ns(struct netif *netif, const ip6_addr_t *target_addr, u8_t flags); +static void nd6_send_na(struct netif *netif, const ip6_addr_t *target_addr, u8_t flags); +static void nd6_send_neighbor_cache_probe(struct nd6_neighbor_cache_entry *entry, u8_t flags); +#if LWIP_IPV6_SEND_ROUTER_SOLICIT +static err_t nd6_send_rs(struct netif *netif); +#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */ + +#if LWIP_ND6_QUEUEING +static void nd6_free_q(struct nd6_q_entry *q); +#else /* LWIP_ND6_QUEUEING */ +#define nd6_free_q(q) pbuf_free(q) +#endif /* LWIP_ND6_QUEUEING */ +static void nd6_send_q(s8_t i); + + +/** + * A local address has been determined to be a duplicate. Take the appropriate + * action(s) on the address and the interface as a whole. + * + * @param netif the netif that owns the address + * @param addr_idx the index of the address detected to be a duplicate + */ +static void +nd6_duplicate_addr_detected(struct netif *netif, s8_t addr_idx) +{ + + /* Mark the address as duplicate, but leave its lifetimes alone. If this was + * a manually assigned address, it will remain in existence as duplicate, and + * as such be unusable for any practical purposes until manual intervention. + * If this was an autogenerated address, the address will follow normal + * expiration rules, and thus disappear once its valid lifetime expires. */ + netif_ip6_addr_set_state(netif, addr_idx, IP6_ADDR_DUPLICATED); + +#if LWIP_IPV6_AUTOCONFIG + /* If the affected address was the link-local address that we use to generate + * all other addresses, then we should not continue to use those derived + * addresses either, so mark them as duplicate as well. For autoconfig-only + * setups, this will make the interface effectively unusable, approaching the + * intention of RFC 4862 Sec. 5.4.5. @todo implement the full requirements */ + if (addr_idx == 0) { + s8_t i; + for (i = 1; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (!ip6_addr_isinvalid(netif_ip6_addr_state(netif, i)) && + !netif_ip6_addr_isstatic(netif, i)) { + netif_ip6_addr_set_state(netif, i, IP6_ADDR_DUPLICATED); + } + } + } +#endif /* LWIP_IPV6_AUTOCONFIG */ +} + +#if LWIP_IPV6_AUTOCONFIG +/** + * We received a router advertisement that contains a prefix with the + * autoconfiguration flag set. Add or update an associated autogenerated + * address. + * + * @param netif the netif on which the router advertisement arrived + * @param prefix_opt a pointer to the prefix option data + * @param prefix_addr an aligned copy of the prefix address + */ +static void +nd6_process_autoconfig_prefix(struct netif *netif, + struct prefix_option *prefix_opt, const ip6_addr_t *prefix_addr) +{ + ip6_addr_t ip6addr; + u32_t valid_life, pref_life; + u8_t addr_state; + s8_t i, free_idx; + + /* The caller already checks RFC 4862 Sec. 5.5.3 points (a) and (b). We do + * the rest, starting with checks for (c) and (d) here. */ + valid_life = lwip_htonl(prefix_opt->valid_lifetime); + pref_life = lwip_htonl(prefix_opt->preferred_lifetime); + if (pref_life > valid_life || prefix_opt->prefix_length != 64) { + return; /* silently ignore this prefix for autoconfiguration purposes */ + } + + /* If an autogenerated address already exists for this prefix, update its + * lifetimes. An address is considered autogenerated if 1) it is not static + * (i.e., manually assigned), and 2) there is an advertised autoconfiguration + * prefix for it (the one we are processing here). This does not necessarily + * exclude the possibility that the address was actually assigned by, say, + * DHCPv6. If that distinction becomes important in the future, more state + * must be kept. As explained elsewhere we also update lifetimes of tentative + * and duplicate addresses. Skip address slot 0 (the link-local address). */ + for (i = 1; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + addr_state = netif_ip6_addr_state(netif, i); + if (!ip6_addr_isinvalid(addr_state) && !netif_ip6_addr_isstatic(netif, i) && + ip6_addr_net_eq(prefix_addr, netif_ip6_addr(netif, i))) { + /* Update the valid lifetime, as per RFC 4862 Sec. 5.5.3 point (e). + * The valid lifetime will never drop to zero as a result of this. */ + u32_t remaining_life = netif_ip6_addr_valid_life(netif, i); + if (valid_life > ND6_2HRS || valid_life > remaining_life) { + netif_ip6_addr_set_valid_life(netif, i, valid_life); + } else if (remaining_life > ND6_2HRS) { + netif_ip6_addr_set_valid_life(netif, i, ND6_2HRS); + } + LWIP_ASSERT("bad valid lifetime", !netif_ip6_addr_isstatic(netif, i)); + /* Update the preferred lifetime. No bounds checks are needed here. In + * rare cases the advertisement may un-deprecate the address, though. + * Deprecation is left to the timer code where it is handled anyway. */ + if (pref_life > 0 && addr_state == IP6_ADDR_DEPRECATED) { + netif_ip6_addr_set_state(netif, i, IP6_ADDR_PREFERRED); + } + netif_ip6_addr_set_pref_life(netif, i, pref_life); + return; /* there should be at most one matching address */ + } + } + + /* No autogenerated address exists for this prefix yet. See if we can add a + * new one. However, if IPv6 autoconfiguration is administratively disabled, + * do not generate new addresses, but do keep updating lifetimes for existing + * addresses. Also, when adding new addresses, we must protect explicitly + * against a valid lifetime of zero, because again, we use that as a special + * value. The generated address would otherwise expire immediately anyway. + * Finally, the original link-local address must be usable at all. We start + * creating addresses even if the link-local address is still in tentative + * state though, and deal with the fallout of that upon DAD collision. */ + addr_state = netif_ip6_addr_state(netif, 0); + if (!netif->ip6_autoconfig_enabled || valid_life == IP6_ADDR_LIFE_STATIC || + ip6_addr_isinvalid(addr_state) || ip6_addr_isduplicated(addr_state)) { + return; + } + + /* Construct the new address that we intend to use, and then see if that + * address really does not exist. It might have been added manually, after + * all. As a side effect, find a free slot. Note that we cannot use + * netif_add_ip6_address() here, as it would return ERR_OK if the address + * already did exist, resulting in that address being given lifetimes. */ + IP6_ADDR(&ip6addr, prefix_addr->addr[0], prefix_addr->addr[1], + netif_ip6_addr(netif, 0)->addr[2], netif_ip6_addr(netif, 0)->addr[3]); + ip6_addr_assign_zone(&ip6addr, IP6_UNICAST, netif); + + free_idx = 0; + for (i = 1; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (!ip6_addr_isinvalid(netif_ip6_addr_state(netif, i))) { + if (ip6_addr_eq(&ip6addr, netif_ip6_addr(netif, i))) { + return; /* formed address already exists */ + } + } else if (free_idx == 0) { + free_idx = i; + } + } + if (free_idx == 0) { + return; /* no address slots available, try again on next advertisement */ + } + + /* Assign the new address to the interface. */ + ip_addr_copy_from_ip6(netif->ip6_addr[free_idx], ip6addr); + netif_ip6_addr_set_valid_life(netif, free_idx, valid_life); + netif_ip6_addr_set_pref_life(netif, free_idx, pref_life); + netif_ip6_addr_set_state(netif, free_idx, IP6_ADDR_TENTATIVE); +} +#endif /* LWIP_IPV6_AUTOCONFIG */ + +/** + * Process an incoming neighbor discovery message + * + * @param p the nd packet, p->payload pointing to the icmpv6 header + * @param inp the netif on which this packet was received + */ +void +nd6_input(struct pbuf *p, struct netif *inp) +{ + u8_t msg_type; + s8_t i; + s16_t dest_idx; + + ND6_STATS_INC(nd6.recv); + + msg_type = *((u8_t *)p->payload); + switch (msg_type) { + case ICMP6_TYPE_NA: /* Neighbor Advertisement. */ + { + struct na_header *na_hdr; + struct lladdr_option *lladdr_opt; + ip6_addr_t target_address; + + /* Check that na header fits in packet. */ + if (p->len < (sizeof(struct na_header))) { + /* @todo debug message */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + na_hdr = (struct na_header *)p->payload; + + /* Create an aligned, zoned copy of the target address. */ + ip6_addr_copy_from_packed(target_address, na_hdr->target_address); + ip6_addr_assign_zone(&target_address, IP6_UNICAST, inp); + + /* Check a subset of the other RFC 4861 Sec. 7.1.2 requirements. */ + if (IP6H_HOPLIM(ip6_current_header()) != ND6_HOPLIM || na_hdr->code != 0 || + ip6_addr_ismulticast(&target_address)) { + pbuf_free(p); + ND6_STATS_INC(nd6.proterr); + ND6_STATS_INC(nd6.drop); + return; + } + + /* @todo RFC MUST: if IP destination is multicast, Solicited flag is zero */ + /* @todo RFC MUST: all included options have a length greater than zero */ + + /* Unsolicited NA?*/ + if (ip6_addr_ismulticast(ip6_current_dest_addr())) { + /* This is an unsolicited NA. + * link-layer changed? + * part of DAD mechanism? */ + +#if LWIP_IPV6_DUP_DETECT_ATTEMPTS + /* If the target address matches this netif, it is a DAD response. */ + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (!ip6_addr_isinvalid(netif_ip6_addr_state(inp, i)) && + !ip6_addr_isduplicated(netif_ip6_addr_state(inp, i)) && + ip6_addr_eq(&target_address, netif_ip6_addr(inp, i))) { + /* We are using a duplicate address. */ + nd6_duplicate_addr_detected(inp, i); + + pbuf_free(p); + return; + } + } +#endif /* LWIP_IPV6_DUP_DETECT_ATTEMPTS */ + + /* Check that link-layer address option also fits in packet. */ + if (p->len < (sizeof(struct na_header) + 2)) { + /* @todo debug message */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + lladdr_opt = (struct lladdr_option *)((u8_t*)p->payload + sizeof(struct na_header)); + + if (p->len < (sizeof(struct na_header) + (lladdr_opt->length << 3))) { + /* @todo debug message */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + /* This is an unsolicited NA, most likely there was a LLADDR change. */ + i = nd6_find_neighbor_cache_entry(&target_address); + if (i >= 0) { + if (na_hdr->flags & ND6_FLAG_OVERRIDE) { + MEMCPY(neighbor_cache[i].lladdr, lladdr_opt->addr, inp->hwaddr_len); + } + } + } else { + /* This is a solicited NA. + * neighbor address resolution response? + * neighbor unreachability detection response? */ + + /* Find the cache entry corresponding to this na. */ + i = nd6_find_neighbor_cache_entry(&target_address); + if (i < 0) { + /* We no longer care about this target address. drop it. */ + pbuf_free(p); + return; + } + + /* Update cache entry. */ + if ((na_hdr->flags & ND6_FLAG_OVERRIDE) || + (neighbor_cache[i].state == ND6_INCOMPLETE)) { + /* Check that link-layer address option also fits in packet. */ + if (p->len < (sizeof(struct na_header) + 2)) { + /* @todo debug message */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + lladdr_opt = (struct lladdr_option *)((u8_t*)p->payload + sizeof(struct na_header)); + + if (p->len < (sizeof(struct na_header) + (lladdr_opt->length << 3))) { + /* @todo debug message */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + MEMCPY(neighbor_cache[i].lladdr, lladdr_opt->addr, inp->hwaddr_len); + } + + neighbor_cache[i].netif = inp; + neighbor_cache[i].state = ND6_REACHABLE; + neighbor_cache[i].counter.reachable_time = reachable_time; + + /* Send queued packets, if any. */ + if (neighbor_cache[i].q != NULL) { + nd6_send_q(i); + } + } + + break; /* ICMP6_TYPE_NA */ + } + case ICMP6_TYPE_NS: /* Neighbor solicitation. */ + { + struct ns_header *ns_hdr; + struct lladdr_option *lladdr_opt; + ip6_addr_t target_address; + u8_t accepted; + + /* Check that ns header fits in packet. */ + if (p->len < sizeof(struct ns_header)) { + /* @todo debug message */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + ns_hdr = (struct ns_header *)p->payload; + + /* Create an aligned, zoned copy of the target address. */ + ip6_addr_copy_from_packed(target_address, ns_hdr->target_address); + ip6_addr_assign_zone(&target_address, IP6_UNICAST, inp); + + /* Check a subset of the other RFC 4861 Sec. 7.1.1 requirements. */ + if (IP6H_HOPLIM(ip6_current_header()) != ND6_HOPLIM || ns_hdr->code != 0 || + ip6_addr_ismulticast(&target_address)) { + pbuf_free(p); + ND6_STATS_INC(nd6.proterr); + ND6_STATS_INC(nd6.drop); + return; + } + + /* @todo RFC MUST: all included options have a length greater than zero */ + /* @todo RFC MUST: if IP source is 'any', destination is solicited-node multicast address */ + /* @todo RFC MUST: if IP source is 'any', there is no source LL address option */ + + /* Check if there is a link-layer address provided. Only point to it if in this buffer. */ + if (p->len >= (sizeof(struct ns_header) + 2)) { + lladdr_opt = (struct lladdr_option *)((u8_t*)p->payload + sizeof(struct ns_header)); + if (p->len < (sizeof(struct ns_header) + (lladdr_opt->length << 3))) { + lladdr_opt = NULL; + } + } else { + lladdr_opt = NULL; + } + + /* Check if the target address is configured on the receiving netif. */ + accepted = 0; + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; ++i) { + if ((ip6_addr_isvalid(netif_ip6_addr_state(inp, i)) || + (ip6_addr_istentative(netif_ip6_addr_state(inp, i)) && + ip6_addr_isany(ip6_current_src_addr()))) && + ip6_addr_eq(&target_address, netif_ip6_addr(inp, i))) { + accepted = 1; + break; + } + } + + /* NS not for us? */ + if (!accepted) { + pbuf_free(p); + return; + } + + /* Check for ANY address in src (DAD algorithm). */ + if (ip6_addr_isany(ip6_current_src_addr())) { + /* Sender is validating this address. */ + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; ++i) { + if (!ip6_addr_isinvalid(netif_ip6_addr_state(inp, i)) && + ip6_addr_eq(&target_address, netif_ip6_addr(inp, i))) { + /* Send a NA back so that the sender does not use this address. */ + nd6_send_na(inp, netif_ip6_addr(inp, i), ND6_FLAG_OVERRIDE | ND6_SEND_FLAG_ALLNODES_DEST); + if (ip6_addr_istentative(netif_ip6_addr_state(inp, i))) { + /* We shouldn't use this address either. */ + nd6_duplicate_addr_detected(inp, i); + } + } + } + } else { + /* Sender is trying to resolve our address. */ + /* Verify that they included their own link-layer address. */ + if (lladdr_opt == NULL) { + /* Not a valid message. */ + pbuf_free(p); + ND6_STATS_INC(nd6.proterr); + ND6_STATS_INC(nd6.drop); + return; + } + + i = nd6_find_neighbor_cache_entry(ip6_current_src_addr()); + if (i>= 0) { + /* We already have a record for the solicitor. */ + if (neighbor_cache[i].state == ND6_INCOMPLETE) { + neighbor_cache[i].netif = inp; + MEMCPY(neighbor_cache[i].lladdr, lladdr_opt->addr, inp->hwaddr_len); + + /* Delay probe in case we get confirmation of reachability from upper layer (TCP). */ + neighbor_cache[i].state = ND6_DELAY; + neighbor_cache[i].counter.delay_time = LWIP_ND6_DELAY_FIRST_PROBE_TIME / ND6_TMR_INTERVAL; + } + } else { + /* Add their IPv6 address and link-layer address to neighbor cache. + * We will need it at least to send a unicast NA message, but most + * likely we will also be communicating with this node soon. */ + i = nd6_new_neighbor_cache_entry(); + if (i < 0) { + /* We couldn't assign a cache entry for this neighbor. + * we won't be able to reply. drop it. */ + pbuf_free(p); + ND6_STATS_INC(nd6.memerr); + return; + } + neighbor_cache[i].netif = inp; + MEMCPY(neighbor_cache[i].lladdr, lladdr_opt->addr, inp->hwaddr_len); + ip6_addr_set(&(neighbor_cache[i].next_hop_address), ip6_current_src_addr()); + + /* Receiving a message does not prove reachability: only in one direction. + * Delay probe in case we get confirmation of reachability from upper layer (TCP). */ + neighbor_cache[i].state = ND6_DELAY; + neighbor_cache[i].counter.delay_time = LWIP_ND6_DELAY_FIRST_PROBE_TIME / ND6_TMR_INTERVAL; + } + + /* Send back a NA for us. Allocate the reply pbuf. */ + nd6_send_na(inp, &target_address, ND6_FLAG_SOLICITED | ND6_FLAG_OVERRIDE); + } + + break; /* ICMP6_TYPE_NS */ + } + case ICMP6_TYPE_RA: /* Router Advertisement. */ + { + struct ra_header *ra_hdr; + u8_t *buffer; /* Used to copy options. */ + u16_t offset; +#if LWIP_ND6_RDNSS_MAX_DNS_SERVERS + /* There can be multiple RDNSS options per RA */ + u8_t rdnss_server_idx = 0; +#endif /* LWIP_ND6_RDNSS_MAX_DNS_SERVERS */ + + /* Check that RA header fits in packet. */ + if (p->len < sizeof(struct ra_header)) { + /* @todo debug message */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + ra_hdr = (struct ra_header *)p->payload; + + /* Check a subset of the other RFC 4861 Sec. 6.1.2 requirements. */ + if (!ip6_addr_islinklocal(ip6_current_src_addr()) || + IP6H_HOPLIM(ip6_current_header()) != ND6_HOPLIM || ra_hdr->code != 0) { + pbuf_free(p); + ND6_STATS_INC(nd6.proterr); + ND6_STATS_INC(nd6.drop); + return; + } + + /* @todo RFC MUST: all included options have a length greater than zero */ + + /* If we are sending RS messages, stop. */ +#if LWIP_IPV6_SEND_ROUTER_SOLICIT + /* ensure at least one solicitation is sent (see RFC 4861, ch. 6.3.7) */ + if ((inp->rs_count < LWIP_ND6_MAX_MULTICAST_SOLICIT) || + (nd6_send_rs(inp) == ERR_OK)) { + inp->rs_count = 0; + } else { + inp->rs_count = 1; + } +#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */ + + /* Get the matching default router entry. */ + i = nd6_get_router(ip6_current_src_addr(), inp); + if (i < 0) { + /* Create a new router entry. */ + i = nd6_new_router(ip6_current_src_addr(), inp); + } + + if (i < 0) { + /* Could not create a new router entry. */ + pbuf_free(p); + ND6_STATS_INC(nd6.memerr); + return; + } + + /* Re-set invalidation timer. */ + default_router_list[i].invalidation_timer = lwip_htons(ra_hdr->router_lifetime); + + /* Re-set default timer values. */ +#if LWIP_ND6_ALLOW_RA_UPDATES + if (ra_hdr->retrans_timer > 0) { + retrans_timer = lwip_htonl(ra_hdr->retrans_timer); + } + if (ra_hdr->reachable_time > 0) { + reachable_time = lwip_htonl(ra_hdr->reachable_time); + } +#endif /* LWIP_ND6_ALLOW_RA_UPDATES */ + + /* @todo set default hop limit... */ + /* ra_hdr->current_hop_limit;*/ + + /* Update flags in local entry (incl. preference). */ + default_router_list[i].flags = ra_hdr->flags; + +#if LWIP_IPV6_DHCP6 + /* Trigger DHCPv6 if enabled */ + dhcp6_nd6_ra_trigger(inp, ra_hdr->flags & ND6_RA_FLAG_MANAGED_ADDR_CONFIG, + ra_hdr->flags & ND6_RA_FLAG_OTHER_CONFIG); +#endif + + /* Offset to options. */ + offset = sizeof(struct ra_header); + + /* Process each option. */ + while ((p->tot_len - offset) >= 2) { + u8_t option_type; + u16_t option_len; + int option_len8 = pbuf_try_get_at(p, offset + 1); + if (option_len8 <= 0) { + /* read beyond end or zero length */ + goto lenerr_drop_free_return; + } + option_len = ((u8_t)option_len8) << 3; + if (option_len > p->tot_len - offset) { + /* short packet (option does not fit in) */ + goto lenerr_drop_free_return; + } + if (p->len == p->tot_len) { + /* no need to copy from contiguous pbuf */ + buffer = &((u8_t*)p->payload)[offset]; + } else { + /* check if this option fits into our buffer */ + if (option_len > sizeof(nd6_ra_buffer)) { + option_type = pbuf_get_at(p, offset); + /* invalid option length */ + if (option_type != ND6_OPTION_TYPE_RDNSS) { + goto lenerr_drop_free_return; + } + /* we allow RDNSS option to be longer - we'll just drop some servers */ + option_len = sizeof(nd6_ra_buffer); + } + buffer = (u8_t*)&nd6_ra_buffer; + option_len = pbuf_copy_partial(p, &nd6_ra_buffer, option_len, offset); + } + option_type = buffer[0]; + switch (option_type) { + case ND6_OPTION_TYPE_SOURCE_LLADDR: + { + struct lladdr_option *lladdr_opt; + if (option_len < sizeof(struct lladdr_option)) { + goto lenerr_drop_free_return; + } + lladdr_opt = (struct lladdr_option *)buffer; + if ((default_router_list[i].neighbor_entry != NULL) && + (default_router_list[i].neighbor_entry->state == ND6_INCOMPLETE)) { + SMEMCPY(default_router_list[i].neighbor_entry->lladdr, lladdr_opt->addr, inp->hwaddr_len); + default_router_list[i].neighbor_entry->state = ND6_REACHABLE; + default_router_list[i].neighbor_entry->counter.reachable_time = reachable_time; + } + break; + } + case ND6_OPTION_TYPE_MTU: + { + struct mtu_option *mtu_opt; + u32_t mtu32; + if (option_len < sizeof(struct mtu_option)) { + goto lenerr_drop_free_return; + } + mtu_opt = (struct mtu_option *)buffer; + mtu32 = lwip_htonl(mtu_opt->mtu); + if ((mtu32 >= IP6_MIN_MTU_LENGTH) && (mtu32 <= 0xffff)) { +#if LWIP_ND6_ALLOW_RA_UPDATES + if (inp->mtu) { + /* don't set the mtu for IPv6 higher than the netif driver supports */ + inp->mtu6 = LWIP_MIN(LWIP_MIN(inp->mtu, inp->mtu6), (u16_t)mtu32); + } else { + inp->mtu6 = (u16_t)mtu32; + } +#endif /* LWIP_ND6_ALLOW_RA_UPDATES */ + } + break; + } + case ND6_OPTION_TYPE_PREFIX_INFO: + { + struct prefix_option *prefix_opt; + ip6_addr_t prefix_addr; + if (option_len < sizeof(struct prefix_option)) { + goto lenerr_drop_free_return; + } + + prefix_opt = (struct prefix_option *)buffer; + + /* Get a memory-aligned copy of the prefix. */ + ip6_addr_copy_from_packed(prefix_addr, prefix_opt->prefix); + ip6_addr_assign_zone(&prefix_addr, IP6_UNICAST, inp); + + if (!ip6_addr_islinklocal(&prefix_addr)) { + if ((prefix_opt->flags & ND6_PREFIX_FLAG_ON_LINK) && + (prefix_opt->prefix_length == 64)) { + /* Add to on-link prefix list. */ + u32_t valid_life; + s8_t prefix; + + valid_life = lwip_htonl(prefix_opt->valid_lifetime); + + /* find cache entry for this prefix. */ + prefix = nd6_get_onlink_prefix(&prefix_addr, inp); + if (prefix < 0 && valid_life > 0) { + /* Create a new cache entry. */ + prefix = nd6_new_onlink_prefix(&prefix_addr, inp); + } + if (prefix >= 0) { + prefix_list[prefix].invalidation_timer = valid_life; + } + } +#if LWIP_IPV6_AUTOCONFIG + if (prefix_opt->flags & ND6_PREFIX_FLAG_AUTONOMOUS) { + /* Perform processing for autoconfiguration. */ + nd6_process_autoconfig_prefix(inp, prefix_opt, &prefix_addr); + } +#endif /* LWIP_IPV6_AUTOCONFIG */ + } + + break; + } + case ND6_OPTION_TYPE_ROUTE_INFO: + /* @todo implement preferred routes. + struct route_option * route_opt; + route_opt = (struct route_option *)buffer;*/ + + break; +#if LWIP_ND6_RDNSS_MAX_DNS_SERVERS + case ND6_OPTION_TYPE_RDNSS: + { + u8_t num, n; + u16_t copy_offset = offset + SIZEOF_RDNSS_OPTION_BASE; + struct rdnss_option * rdnss_opt; + if (option_len < SIZEOF_RDNSS_OPTION_BASE) { + goto lenerr_drop_free_return; + } + + rdnss_opt = (struct rdnss_option *)buffer; + num = (rdnss_opt->length - 1) / 2; + for (n = 0; (rdnss_server_idx < DNS_MAX_SERVERS) && (n < num); n++, copy_offset += sizeof(ip6_addr_p_t)) { + ip_addr_t rdnss_address; + + /* Copy directly from pbuf to get an aligned, zoned copy of the prefix. */ + if (pbuf_copy_partial(p, &rdnss_address, sizeof(ip6_addr_p_t), copy_offset) == sizeof(ip6_addr_p_t)) { + IP_SET_TYPE_VAL(rdnss_address, IPADDR_TYPE_V6); + ip6_addr_assign_zone(ip_2_ip6(&rdnss_address), IP6_UNKNOWN, inp); + + if (htonl(rdnss_opt->lifetime) > 0) { + /* TODO implement Lifetime > 0 */ + dns_setserver(rdnss_server_idx++, &rdnss_address); + } else { + /* TODO implement DNS removal in dns.c */ + u8_t s; + for (s = 0; s < DNS_MAX_SERVERS; s++) { + const ip_addr_t *addr = dns_getserver(s); + if(ip_addr_eq(addr, &rdnss_address)) { + dns_setserver(s, NULL); + } + } + } + } + } + break; + } +#endif /* LWIP_ND6_RDNSS_MAX_DNS_SERVERS */ + default: + /* Unrecognized option, abort. */ + ND6_STATS_INC(nd6.proterr); + break; + } + /* option length is checked earlier to be non-zero to make sure loop ends */ + offset += 8 * (u8_t)option_len8; + } + + break; /* ICMP6_TYPE_RA */ + } + case ICMP6_TYPE_RD: /* Redirect */ + { + struct redirect_header *redir_hdr; + struct lladdr_option *lladdr_opt; + ip6_addr_t destination_address, target_address; + + /* Check that Redir header fits in packet. */ + if (p->len < sizeof(struct redirect_header)) { + /* @todo debug message */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + redir_hdr = (struct redirect_header *)p->payload; + + /* Create an aligned, zoned copy of the destination address. */ + ip6_addr_copy_from_packed(destination_address, redir_hdr->destination_address); + ip6_addr_assign_zone(&destination_address, IP6_UNICAST, inp); + + /* Check a subset of the other RFC 4861 Sec. 8.1 requirements. */ + if (!ip6_addr_islinklocal(ip6_current_src_addr()) || + IP6H_HOPLIM(ip6_current_header()) != ND6_HOPLIM || + redir_hdr->code != 0 || ip6_addr_ismulticast(&destination_address)) { + pbuf_free(p); + ND6_STATS_INC(nd6.proterr); + ND6_STATS_INC(nd6.drop); + return; + } + + /* @todo RFC MUST: IP source address equals first-hop router for destination_address */ + /* @todo RFC MUST: ICMP target address is either link-local address or same as destination_address */ + /* @todo RFC MUST: all included options have a length greater than zero */ + + if (p->len >= (sizeof(struct redirect_header) + 2)) { + lladdr_opt = (struct lladdr_option *)((u8_t*)p->payload + sizeof(struct redirect_header)); + if (p->len < (sizeof(struct redirect_header) + (lladdr_opt->length << 3))) { + lladdr_opt = NULL; + } + } else { + lladdr_opt = NULL; + } + + /* Find dest address in cache */ + dest_idx = nd6_find_destination_cache_entry(&destination_address); + if (dest_idx < 0) { + /* Destination not in cache, drop packet. */ + pbuf_free(p); + return; + } + + /* Create an aligned, zoned copy of the target address. */ + ip6_addr_copy_from_packed(target_address, redir_hdr->target_address); + ip6_addr_assign_zone(&target_address, IP6_UNICAST, inp); + + /* Set the new target address. */ + ip6_addr_copy(destination_cache[dest_idx].next_hop_addr, target_address); + + /* If Link-layer address of other router is given, try to add to neighbor cache. */ + if (lladdr_opt != NULL) { + if (lladdr_opt->type == ND6_OPTION_TYPE_TARGET_LLADDR) { + i = nd6_find_neighbor_cache_entry(&target_address); + if (i < 0) { + i = nd6_new_neighbor_cache_entry(); + if (i >= 0) { + neighbor_cache[i].netif = inp; + MEMCPY(neighbor_cache[i].lladdr, lladdr_opt->addr, inp->hwaddr_len); + ip6_addr_copy(neighbor_cache[i].next_hop_address, target_address); + + /* Receiving a message does not prove reachability: only in one direction. + * Delay probe in case we get confirmation of reachability from upper layer (TCP). */ + neighbor_cache[i].state = ND6_DELAY; + neighbor_cache[i].counter.delay_time = LWIP_ND6_DELAY_FIRST_PROBE_TIME / ND6_TMR_INTERVAL; + } + } + if (i >= 0) { + if (neighbor_cache[i].state == ND6_INCOMPLETE) { + MEMCPY(neighbor_cache[i].lladdr, lladdr_opt->addr, inp->hwaddr_len); + /* Receiving a message does not prove reachability: only in one direction. + * Delay probe in case we get confirmation of reachability from upper layer (TCP). */ + neighbor_cache[i].state = ND6_DELAY; + neighbor_cache[i].counter.delay_time = LWIP_ND6_DELAY_FIRST_PROBE_TIME / ND6_TMR_INTERVAL; + } + } + } + } + break; /* ICMP6_TYPE_RD */ + } + case ICMP6_TYPE_PTB: /* Packet too big */ + { + struct icmp6_hdr *icmp6hdr; /* Packet too big message */ + struct ip6_hdr *ip6hdr; /* IPv6 header of the packet which caused the error */ + u32_t pmtu; + ip6_addr_t destination_address; + + /* Check that ICMPv6 header + IPv6 header fit in payload */ + if (p->len < (sizeof(struct icmp6_hdr) + IP6_HLEN)) { + /* drop short packets */ + pbuf_free(p); + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + return; + } + + icmp6hdr = (struct icmp6_hdr *)p->payload; + ip6hdr = (struct ip6_hdr *)((u8_t*)p->payload + sizeof(struct icmp6_hdr)); + + /* Create an aligned, zoned copy of the destination address. */ + ip6_addr_copy_from_packed(destination_address, ip6hdr->dest); + ip6_addr_assign_zone(&destination_address, IP6_UNKNOWN, inp); + + /* Look for entry in destination cache. */ + dest_idx = nd6_find_destination_cache_entry(&destination_address); + if (dest_idx < 0) { + /* Destination not in cache, drop packet. */ + pbuf_free(p); + return; + } + + /* Change the Path MTU. */ + pmtu = lwip_htonl(icmp6hdr->data); + destination_cache[dest_idx].pmtu = (u16_t)LWIP_MIN(pmtu, 0xFFFF); + + break; /* ICMP6_TYPE_PTB */ + } + + default: + ND6_STATS_INC(nd6.proterr); + ND6_STATS_INC(nd6.drop); + break; /* default */ + } + + pbuf_free(p); + return; +lenerr_drop_free_return: + ND6_STATS_INC(nd6.lenerr); + ND6_STATS_INC(nd6.drop); + pbuf_free(p); +} + + +/** + * Periodic timer for Neighbor discovery functions: + * + * - Update neighbor reachability states + * - Update destination cache entries age + * - Update invalidation timers of default routers and on-link prefixes + * - Update lifetimes of our addresses + * - Perform duplicate address detection (DAD) for our addresses + * - Send router solicitations + */ +void +nd6_tmr(void) +{ + s8_t i; + struct netif *netif; + + /* Process neighbor entries. */ + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + switch (neighbor_cache[i].state) { + case ND6_INCOMPLETE: + if ((neighbor_cache[i].counter.probes_sent >= LWIP_ND6_MAX_MULTICAST_SOLICIT) && + (!neighbor_cache[i].isrouter)) { + /* Retries exceeded. */ + nd6_free_neighbor_cache_entry(i); + } else { + /* Send a NS for this entry. */ + neighbor_cache[i].counter.probes_sent++; + nd6_send_neighbor_cache_probe(&neighbor_cache[i], ND6_SEND_FLAG_MULTICAST_DEST); + } + break; + case ND6_REACHABLE: + /* Send queued packets, if any are left. Should have been sent already. */ + if (neighbor_cache[i].q != NULL) { + nd6_send_q(i); + } + if (neighbor_cache[i].counter.reachable_time <= ND6_TMR_INTERVAL) { + /* Change to stale state. */ + neighbor_cache[i].state = ND6_STALE; + neighbor_cache[i].counter.stale_time = 0; + } else { + neighbor_cache[i].counter.reachable_time -= ND6_TMR_INTERVAL; + } + break; + case ND6_STALE: + neighbor_cache[i].counter.stale_time++; + break; + case ND6_DELAY: + if (neighbor_cache[i].counter.delay_time <= 1) { + /* Change to PROBE state. */ + neighbor_cache[i].state = ND6_PROBE; + neighbor_cache[i].counter.probes_sent = 0; + } else { + neighbor_cache[i].counter.delay_time--; + } + break; + case ND6_PROBE: + if ((neighbor_cache[i].counter.probes_sent >= LWIP_ND6_MAX_MULTICAST_SOLICIT) && + (!neighbor_cache[i].isrouter)) { + /* Retries exceeded. */ + nd6_free_neighbor_cache_entry(i); + } else { + /* Send a NS for this entry. */ + neighbor_cache[i].counter.probes_sent++; + nd6_send_neighbor_cache_probe(&neighbor_cache[i], 0); + } + break; + case ND6_NO_ENTRY: + default: + /* Do nothing. */ + break; + } + } + + /* Process destination entries. */ + for (i = 0; i < LWIP_ND6_NUM_DESTINATIONS; i++) { + destination_cache[i].age++; + } + + /* Process router entries. */ + for (i = 0; i < LWIP_ND6_NUM_ROUTERS; i++) { + if (default_router_list[i].neighbor_entry != NULL) { + /* Active entry. */ + if (default_router_list[i].invalidation_timer <= ND6_TMR_INTERVAL / 1000) { + /* No more than 1 second remaining. Clear this entry. Also clear any of + * its destination cache entries, as per RFC 4861 Sec. 5.3 and 6.3.5. */ + s8_t j; + for (j = 0; j < LWIP_ND6_NUM_DESTINATIONS; j++) { + if (ip6_addr_eq(&destination_cache[j].next_hop_addr, + &default_router_list[i].neighbor_entry->next_hop_address)) { + ip6_addr_set_any(&destination_cache[j].destination_addr); + } + } + default_router_list[i].neighbor_entry->isrouter = 0; + default_router_list[i].neighbor_entry = NULL; + default_router_list[i].invalidation_timer = 0; + default_router_list[i].flags = 0; + } else { + default_router_list[i].invalidation_timer -= ND6_TMR_INTERVAL / 1000; + } + } + } + + /* Process prefix entries. */ + for (i = 0; i < LWIP_ND6_NUM_PREFIXES; i++) { + if (prefix_list[i].netif != NULL) { + if (prefix_list[i].invalidation_timer <= ND6_TMR_INTERVAL / 1000) { + /* Entry timed out, remove it */ + prefix_list[i].invalidation_timer = 0; + prefix_list[i].netif = NULL; + } else { + prefix_list[i].invalidation_timer -= ND6_TMR_INTERVAL / 1000; + } + } + } + + /* Process our own addresses, updating address lifetimes and/or DAD state. */ + NETIF_FOREACH(netif) { + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; ++i) { + u8_t addr_state; +#if LWIP_IPV6_ADDRESS_LIFETIMES + /* Step 1: update address lifetimes (valid and preferred). */ + addr_state = netif_ip6_addr_state(netif, i); + /* RFC 4862 is not entirely clear as to whether address lifetimes affect + * tentative addresses, and is even less clear as to what should happen + * with duplicate addresses. We choose to track and update lifetimes for + * both those types, although for different reasons: + * - for tentative addresses, the line of thought of Sec. 5.7 combined + * with the potentially long period that an address may be in tentative + * state (due to the interface being down) suggests that lifetimes + * should be independent of external factors which would include DAD; + * - for duplicate addresses, retiring them early could result in a new + * but unwanted attempt at marking them as valid, while retiring them + * late/never could clog up address slots on the netif. + * As a result, we may end up expiring addresses of either type here. + */ + if (!ip6_addr_isinvalid(addr_state) && + !netif_ip6_addr_isstatic(netif, i)) { + u32_t life = netif_ip6_addr_valid_life(netif, i); + if (life <= ND6_TMR_INTERVAL / 1000) { + /* The address has expired. */ + netif_ip6_addr_set_valid_life(netif, i, 0); + netif_ip6_addr_set_pref_life(netif, i, 0); + netif_ip6_addr_set_state(netif, i, IP6_ADDR_INVALID); + } else { + if (!ip6_addr_life_isinfinite(life)) { + life -= ND6_TMR_INTERVAL / 1000; + LWIP_ASSERT("bad valid lifetime", life != IP6_ADDR_LIFE_STATIC); + netif_ip6_addr_set_valid_life(netif, i, life); + } + /* The address is still here. Update the preferred lifetime too. */ + life = netif_ip6_addr_pref_life(netif, i); + if (life <= ND6_TMR_INTERVAL / 1000) { + /* This case must also trigger if 'life' was already zero, so as to + * deal correctly with advertised preferred-lifetime reductions. */ + netif_ip6_addr_set_pref_life(netif, i, 0); + if (addr_state == IP6_ADDR_PREFERRED) + netif_ip6_addr_set_state(netif, i, IP6_ADDR_DEPRECATED); + } else if (!ip6_addr_life_isinfinite(life)) { + life -= ND6_TMR_INTERVAL / 1000; + netif_ip6_addr_set_pref_life(netif, i, life); + } + } + } + /* The address state may now have changed, so reobtain it next. */ +#endif /* LWIP_IPV6_ADDRESS_LIFETIMES */ + /* Step 2: update DAD state. */ + addr_state = netif_ip6_addr_state(netif, i); + if (ip6_addr_istentative(addr_state)) { + if ((addr_state & IP6_ADDR_TENTATIVE_COUNT_MASK) >= LWIP_IPV6_DUP_DETECT_ATTEMPTS) { + /* No NA received in response. Mark address as valid. For dynamic + * addresses with an expired preferred lifetime, the state is set to + * deprecated right away. That should almost never happen, though. */ + addr_state = IP6_ADDR_PREFERRED; +#if LWIP_IPV6_ADDRESS_LIFETIMES + if (!netif_ip6_addr_isstatic(netif, i) && + netif_ip6_addr_pref_life(netif, i) == 0) { + addr_state = IP6_ADDR_DEPRECATED; + } +#endif /* LWIP_IPV6_ADDRESS_LIFETIMES */ + netif_ip6_addr_set_state(netif, i, addr_state); + } else if (netif_is_up(netif) && netif_is_link_up(netif)) { + /* tentative: set next state by increasing by one */ + netif_ip6_addr_set_state(netif, i, addr_state + 1); + /* Send a NS for this address. Use the unspecified address as source + * address in all cases (RFC 4862 Sec. 5.4.2), not in the least + * because as it is, we only consider multicast replies for DAD. */ + nd6_send_ns(netif, netif_ip6_addr(netif, i), + ND6_SEND_FLAG_MULTICAST_DEST | ND6_SEND_FLAG_ANY_SRC); + } + } + } + } + +#if LWIP_IPV6_SEND_ROUTER_SOLICIT + /* Send router solicitation messages, if necessary. */ + if (!nd6_tmr_rs_reduction) { + nd6_tmr_rs_reduction = (ND6_RTR_SOLICITATION_INTERVAL / ND6_TMR_INTERVAL) - 1; + NETIF_FOREACH(netif) { + if ((netif->rs_count > 0) && netif_is_up(netif) && + netif_is_link_up(netif) && + !ip6_addr_isinvalid(netif_ip6_addr_state(netif, 0)) && + !ip6_addr_isduplicated(netif_ip6_addr_state(netif, 0))) { + if (nd6_send_rs(netif) == ERR_OK) { + netif->rs_count--; + } + } + } + } else { + nd6_tmr_rs_reduction--; + } +#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */ + +} + +/** Send a neighbor solicitation message for a specific neighbor cache entry + * + * @param entry the neightbor cache entry for which to send the message + * @param flags one of ND6_SEND_FLAG_* + */ +static void +nd6_send_neighbor_cache_probe(struct nd6_neighbor_cache_entry *entry, u8_t flags) +{ + nd6_send_ns(entry->netif, &entry->next_hop_address, flags); +} + +/** + * Send a neighbor solicitation message + * + * @param netif the netif on which to send the message + * @param target_addr the IPv6 target address for the ND message + * @param flags one of ND6_SEND_FLAG_* + */ +static void +nd6_send_ns(struct netif *netif, const ip6_addr_t *target_addr, u8_t flags) +{ + struct ns_header *ns_hdr; + struct pbuf *p; + const ip6_addr_t *src_addr = NULL; + u16_t lladdr_opt_len; + + LWIP_ASSERT("target address is required", target_addr != NULL); + + if (!(flags & ND6_SEND_FLAG_ANY_SRC)) { + int i; + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) && + ip6_addr_net_eq(target_addr, netif_ip6_addr(netif, i))) { + src_addr = netif_ip6_addr(netif, i); + break; + } + } + + if (i == LWIP_IPV6_NUM_ADDRESSES) { + LWIP_DEBUGF(IP6_DEBUG | LWIP_DBG_LEVEL_WARNING, ("ICMPv6 NS: no available src address\n")); + ND6_STATS_INC(nd6.err); + return; + } + + /* calculate option length (in 8-byte-blocks) */ + lladdr_opt_len = ((netif->hwaddr_len + 2) + 7) >> 3; + } else { + src_addr = IP6_ADDR_ANY6; + /* Option "MUST NOT be included when the source IP address is the unspecified address." */ + lladdr_opt_len = 0; + } + + /* Allocate a packet. */ + p = pbuf_alloc(PBUF_IP, sizeof(struct ns_header) + (lladdr_opt_len << 3), PBUF_RAM); + if (p == NULL) { + ND6_STATS_INC(nd6.memerr); + return; + } + + /* Set fields. */ + ns_hdr = (struct ns_header *)p->payload; + + ns_hdr->type = ICMP6_TYPE_NS; + ns_hdr->code = 0; + ns_hdr->chksum = 0; + ns_hdr->reserved = 0; + ip6_addr_copy_to_packed(ns_hdr->target_address, *target_addr); + + if (lladdr_opt_len != 0) { + struct lladdr_option *lladdr_opt = (struct lladdr_option *)((u8_t*)p->payload + sizeof(struct ns_header)); + lladdr_opt->type = ND6_OPTION_TYPE_SOURCE_LLADDR; + lladdr_opt->length = (u8_t)lladdr_opt_len; + SMEMCPY(lladdr_opt->addr, netif->hwaddr, netif->hwaddr_len); + } + + /* Generate the solicited node address for the target address. */ + if (flags & ND6_SEND_FLAG_MULTICAST_DEST) { + ip6_addr_set_solicitednode(&multicast_address, target_addr->addr[3]); + ip6_addr_assign_zone(&multicast_address, IP6_MULTICAST, netif); + target_addr = &multicast_address; + } + +#if CHECKSUM_GEN_ICMP6 + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP6) { + ns_hdr->chksum = ip6_chksum_pseudo(p, IP6_NEXTH_ICMP6, p->len, src_addr, + target_addr); + } +#endif /* CHECKSUM_GEN_ICMP6 */ + + /* Send the packet out. */ + ND6_STATS_INC(nd6.xmit); + ip6_output_if(p, (src_addr == IP6_ADDR_ANY6) ? NULL : src_addr, target_addr, + ND6_HOPLIM, 0, IP6_NEXTH_ICMP6, netif); + pbuf_free(p); +} + +/** + * Send a neighbor advertisement message + * + * @param netif the netif on which to send the message + * @param target_addr the IPv6 target address for the ND message + * @param flags one of ND6_SEND_FLAG_* + */ +static void +nd6_send_na(struct netif *netif, const ip6_addr_t *target_addr, u8_t flags) +{ + struct na_header *na_hdr; + struct lladdr_option *lladdr_opt; + struct pbuf *p; + const ip6_addr_t *src_addr; + const ip6_addr_t *dest_addr; + u16_t lladdr_opt_len; + + LWIP_ASSERT("target address is required", target_addr != NULL); + + /* Use link-local address as source address. */ + /* src_addr = netif_ip6_addr(netif, 0); */ + /* Use target address as source address. */ + src_addr = target_addr; + + /* Allocate a packet. */ + lladdr_opt_len = ((netif->hwaddr_len + 2) >> 3) + (((netif->hwaddr_len + 2) & 0x07) ? 1 : 0); + p = pbuf_alloc(PBUF_IP, sizeof(struct na_header) + (lladdr_opt_len << 3), PBUF_RAM); + if (p == NULL) { + ND6_STATS_INC(nd6.memerr); + return; + } + + /* Set fields. */ + na_hdr = (struct na_header *)p->payload; + lladdr_opt = (struct lladdr_option *)((u8_t*)p->payload + sizeof(struct na_header)); + + na_hdr->type = ICMP6_TYPE_NA; + na_hdr->code = 0; + na_hdr->chksum = 0; + na_hdr->flags = flags & 0xf0; + na_hdr->reserved[0] = 0; + na_hdr->reserved[1] = 0; + na_hdr->reserved[2] = 0; + ip6_addr_copy_to_packed(na_hdr->target_address, *target_addr); + + lladdr_opt->type = ND6_OPTION_TYPE_TARGET_LLADDR; + lladdr_opt->length = (u8_t)lladdr_opt_len; + SMEMCPY(lladdr_opt->addr, netif->hwaddr, netif->hwaddr_len); + + /* Generate the solicited node address for the target address. */ + if (flags & ND6_SEND_FLAG_MULTICAST_DEST) { + ip6_addr_set_solicitednode(&multicast_address, target_addr->addr[3]); + ip6_addr_assign_zone(&multicast_address, IP6_MULTICAST, netif); + dest_addr = &multicast_address; + } else if (flags & ND6_SEND_FLAG_ALLNODES_DEST) { + ip6_addr_set_allnodes_linklocal(&multicast_address); + ip6_addr_assign_zone(&multicast_address, IP6_MULTICAST, netif); + dest_addr = &multicast_address; + } else { + dest_addr = ip6_current_src_addr(); + } + +#if CHECKSUM_GEN_ICMP6 + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP6) { + na_hdr->chksum = ip6_chksum_pseudo(p, IP6_NEXTH_ICMP6, p->len, src_addr, + dest_addr); + } +#endif /* CHECKSUM_GEN_ICMP6 */ + + /* Send the packet out. */ + ND6_STATS_INC(nd6.xmit); + ip6_output_if(p, src_addr, dest_addr, + ND6_HOPLIM, 0, IP6_NEXTH_ICMP6, netif); + pbuf_free(p); +} + +#if LWIP_IPV6_SEND_ROUTER_SOLICIT +/** + * Send a router solicitation message + * + * @param netif the netif on which to send the message + */ +static err_t +nd6_send_rs(struct netif *netif) +{ + struct rs_header *rs_hdr; + struct lladdr_option *lladdr_opt; + struct pbuf *p; + const ip6_addr_t *src_addr; + err_t err; + u16_t lladdr_opt_len = 0; + + /* Link-local source address, or unspecified address? */ + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, 0))) { + src_addr = netif_ip6_addr(netif, 0); + } else { + src_addr = IP6_ADDR_ANY6; + } + + /* Generate the all routers target address. */ + ip6_addr_set_allrouters_linklocal(&multicast_address); + ip6_addr_assign_zone(&multicast_address, IP6_MULTICAST, netif); + + /* Allocate a packet. */ + if (src_addr != IP6_ADDR_ANY6) { + lladdr_opt_len = ((netif->hwaddr_len + 2) >> 3) + (((netif->hwaddr_len + 2) & 0x07) ? 1 : 0); + } + p = pbuf_alloc(PBUF_IP, sizeof(struct rs_header) + (lladdr_opt_len << 3), PBUF_RAM); + if (p == NULL) { + ND6_STATS_INC(nd6.memerr); + return ERR_BUF; + } + + /* Set fields. */ + rs_hdr = (struct rs_header *)p->payload; + + rs_hdr->type = ICMP6_TYPE_RS; + rs_hdr->code = 0; + rs_hdr->chksum = 0; + rs_hdr->reserved = 0; + + if (src_addr != IP6_ADDR_ANY6) { + /* Include our hw address. */ + lladdr_opt = (struct lladdr_option *)((u8_t*)p->payload + sizeof(struct rs_header)); + lladdr_opt->type = ND6_OPTION_TYPE_SOURCE_LLADDR; + lladdr_opt->length = (u8_t)lladdr_opt_len; + SMEMCPY(lladdr_opt->addr, netif->hwaddr, netif->hwaddr_len); + } + +#if CHECKSUM_GEN_ICMP6 + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP6) { + rs_hdr->chksum = ip6_chksum_pseudo(p, IP6_NEXTH_ICMP6, p->len, src_addr, + &multicast_address); + } +#endif /* CHECKSUM_GEN_ICMP6 */ + + /* Send the packet out. */ + ND6_STATS_INC(nd6.xmit); + + err = ip6_output_if(p, (src_addr == IP6_ADDR_ANY6) ? NULL : src_addr, &multicast_address, + ND6_HOPLIM, 0, IP6_NEXTH_ICMP6, netif); + pbuf_free(p); + + return err; +} +#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */ + +/** + * Search for a neighbor cache entry + * + * @param ip6addr the IPv6 address of the neighbor + * @return The neighbor cache entry index that matched, -1 if no + * entry is found + */ +static s8_t +nd6_find_neighbor_cache_entry(const ip6_addr_t *ip6addr) +{ + s8_t i; + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if (ip6_addr_eq(ip6addr, &(neighbor_cache[i].next_hop_address))) { + return i; + } + } + return -1; +} + +/** + * Create a new neighbor cache entry. + * + * If no unused entry is found, will try to recycle an old entry + * according to ad-hoc "age" heuristic. + * + * @return The neighbor cache entry index that was created, -1 if no + * entry could be created + */ +static s8_t +nd6_new_neighbor_cache_entry(void) +{ + s8_t i; + s8_t j; + u32_t time; + + + /* First, try to find an empty entry. */ + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if (neighbor_cache[i].state == ND6_NO_ENTRY) { + return i; + } + } + + /* We need to recycle an entry. in general, do not recycle if it is a router. */ + + /* Next, try to find a Stale entry. */ + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if ((neighbor_cache[i].state == ND6_STALE) && + (!neighbor_cache[i].isrouter)) { + nd6_free_neighbor_cache_entry(i); + return i; + } + } + + /* Next, try to find a Probe entry. */ + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if ((neighbor_cache[i].state == ND6_PROBE) && + (!neighbor_cache[i].isrouter)) { + nd6_free_neighbor_cache_entry(i); + return i; + } + } + + /* Next, try to find a Delayed entry. */ + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if ((neighbor_cache[i].state == ND6_DELAY) && + (!neighbor_cache[i].isrouter)) { + nd6_free_neighbor_cache_entry(i); + return i; + } + } + + /* Next, try to find the oldest reachable entry. */ + time = 0xfffffffful; + j = -1; + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if ((neighbor_cache[i].state == ND6_REACHABLE) && + (!neighbor_cache[i].isrouter)) { + if (neighbor_cache[i].counter.reachable_time < time) { + j = i; + time = neighbor_cache[i].counter.reachable_time; + } + } + } + if (j >= 0) { + nd6_free_neighbor_cache_entry(j); + return j; + } + + /* Next, find oldest incomplete entry without queued packets. */ + time = 0; + j = -1; + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if ( + (neighbor_cache[i].q == NULL) && + (neighbor_cache[i].state == ND6_INCOMPLETE) && + (!neighbor_cache[i].isrouter)) { + if (neighbor_cache[i].counter.probes_sent >= time) { + j = i; + time = neighbor_cache[i].counter.probes_sent; + } + } + } + if (j >= 0) { + nd6_free_neighbor_cache_entry(j); + return j; + } + + /* Next, find oldest incomplete entry with queued packets. */ + time = 0; + j = -1; + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if ((neighbor_cache[i].state == ND6_INCOMPLETE) && + (!neighbor_cache[i].isrouter)) { + if (neighbor_cache[i].counter.probes_sent >= time) { + j = i; + time = neighbor_cache[i].counter.probes_sent; + } + } + } + if (j >= 0) { + nd6_free_neighbor_cache_entry(j); + return j; + } + + /* No more entries to try. */ + return -1; +} + +/** + * Will free any resources associated with a neighbor cache + * entry, and will mark it as unused. + * + * @param i the neighbor cache entry index to free + */ +static void +nd6_free_neighbor_cache_entry(s8_t i) +{ + if ((i < 0) || (i >= LWIP_ND6_NUM_NEIGHBORS)) { + return; + } + if (neighbor_cache[i].isrouter) { + /* isrouter needs to be cleared before deleting a neighbor cache entry */ + return; + } + + /* Free any queued packets. */ + if (neighbor_cache[i].q != NULL) { + nd6_free_q(neighbor_cache[i].q); + neighbor_cache[i].q = NULL; + } + + neighbor_cache[i].state = ND6_NO_ENTRY; + neighbor_cache[i].isrouter = 0; + neighbor_cache[i].netif = NULL; + neighbor_cache[i].counter.reachable_time = 0; + ip6_addr_set_zero(&(neighbor_cache[i].next_hop_address)); +} + +/** + * Search for a destination cache entry + * + * @param ip6addr the IPv6 address of the destination + * @return The destination cache entry index that matched, -1 if no + * entry is found + */ +static s16_t +nd6_find_destination_cache_entry(const ip6_addr_t *ip6addr) +{ + s16_t i; + + IP6_ADDR_ZONECHECK(ip6addr); + + for (i = 0; i < LWIP_ND6_NUM_DESTINATIONS; i++) { + if (ip6_addr_eq(ip6addr, &(destination_cache[i].destination_addr))) { + return i; + } + } + return -1; +} + +/** + * Create a new destination cache entry. If no unused entry is found, + * will recycle oldest entry. + * + * @return The destination cache entry index that was created, -1 if no + * entry was created + */ +static s16_t +nd6_new_destination_cache_entry(void) +{ + s16_t i, j; + u32_t age; + + /* Find an empty entry. */ + for (i = 0; i < LWIP_ND6_NUM_DESTINATIONS; i++) { + if (ip6_addr_isany(&(destination_cache[i].destination_addr))) { + return i; + } + } + + /* Find oldest entry. */ + age = 0; + j = LWIP_ND6_NUM_DESTINATIONS - 1; + for (i = 0; i < LWIP_ND6_NUM_DESTINATIONS; i++) { + if (destination_cache[i].age > age) { + j = i; + } + } + + return j; +} + +/** + * Clear the destination cache. + * + * This operation may be necessary for consistency in the light of changing + * local addresses and/or use of the gateway hook. + */ +void +nd6_clear_destination_cache(void) +{ + int i; + + for (i = 0; i < LWIP_ND6_NUM_DESTINATIONS; i++) { + ip6_addr_set_any(&destination_cache[i].destination_addr); + } +} + +/** + * Determine whether an address matches an on-link prefix or the subnet of a + * statically assigned address. + * + * @param ip6addr the IPv6 address to match + * @return 1 if the address is on-link, 0 otherwise + */ +static int +nd6_is_prefix_in_netif(const ip6_addr_t *ip6addr, struct netif *netif) +{ + s8_t i; + + /* Check to see if the address matches an on-link prefix. */ + for (i = 0; i < LWIP_ND6_NUM_PREFIXES; i++) { + if ((prefix_list[i].netif == netif) && + (prefix_list[i].invalidation_timer > 0) && + ip6_addr_net_eq(ip6addr, &(prefix_list[i].prefix))) { + return 1; + } + } + /* Check to see if address prefix matches a manually configured (= static) + * address. Static addresses have an implied /64 subnet assignment. Dynamic + * addresses (from autoconfiguration) have no implied subnet assignment, and + * are thus effectively /128 assignments. See RFC 5942 for more on this. */ + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) && + netif_ip6_addr_isstatic(netif, i) && + ip6_addr_net_eq(ip6addr, netif_ip6_addr(netif, i))) { + return 1; + } + } + return 0; +} + +/** + * Select a default router for a destination. + * + * This function is used both for routing and for finding a next-hop target for + * a packet. In the former case, the given netif is NULL, and the returned + * router entry must be for a netif suitable for sending packets (up, link up). + * In the latter case, the given netif is not NULL and restricts router choice. + * + * @param ip6addr the destination address + * @param netif the netif for the outgoing packet, if known + * @return the default router entry index, or -1 if no suitable + * router is found + */ +static s8_t +nd6_select_router(const ip6_addr_t *ip6addr, struct netif *netif) +{ + struct netif *router_netif; + s8_t i, j, valid_router; + static s8_t last_router; + + LWIP_UNUSED_ARG(ip6addr); /* @todo match preferred routes!! (must implement ND6_OPTION_TYPE_ROUTE_INFO) */ + + /* @todo: implement default router preference */ + + /* Look for valid routers. A reachable router is preferred. */ + valid_router = -1; + for (i = 0; i < LWIP_ND6_NUM_ROUTERS; i++) { + /* Is the router netif both set and apppropriate? */ + if (default_router_list[i].neighbor_entry != NULL) { + router_netif = default_router_list[i].neighbor_entry->netif; + if ((router_netif != NULL) && (netif != NULL ? netif == router_netif : + (netif_is_up(router_netif) && netif_is_link_up(router_netif)))) { + /* Is the router valid, i.e., reachable or probably reachable as per + * RFC 4861 Sec. 6.3.6? Note that we will never return a router that + * has no neighbor cache entry, due to the netif association tests. */ + if (default_router_list[i].neighbor_entry->state != ND6_INCOMPLETE) { + /* Is the router known to be reachable? */ + if (default_router_list[i].neighbor_entry->state == ND6_REACHABLE) { + return i; /* valid and reachable - done! */ + } else if (valid_router < 0) { + valid_router = i; /* valid but not known to be reachable */ + } + } + } + } + } + if (valid_router >= 0) { + return valid_router; + } + + /* Look for any router for which we have any information at all. */ + /* last_router is used for round-robin selection of incomplete routers, as + * recommended in RFC 4861 Sec. 6.3.6 point (2). Advance only when picking a + * route, to select the same router as next-hop target in the common case. */ + if ((netif == NULL) && (++last_router >= LWIP_ND6_NUM_ROUTERS)) { + last_router = 0; + } + i = last_router; + for (j = 0; j < LWIP_ND6_NUM_ROUTERS; j++) { + if (default_router_list[i].neighbor_entry != NULL) { + router_netif = default_router_list[i].neighbor_entry->netif; + if ((router_netif != NULL) && (netif != NULL ? netif == router_netif : + (netif_is_up(router_netif) && netif_is_link_up(router_netif)))) { + return i; + } + } + if (++i >= LWIP_ND6_NUM_ROUTERS) { + i = 0; + } + } + + /* no suitable router found. */ + return -1; +} + +/** + * Find a router-announced route to the given destination. This route may be + * based on an on-link prefix or a default router. + * + * If a suitable route is found, the returned netif is guaranteed to be in a + * suitable state (up, link up) to be used for packet transmission. + * + * @param ip6addr the destination IPv6 address + * @return the netif to use for the destination, or NULL if none found + */ +struct netif * +nd6_find_route(const ip6_addr_t *ip6addr) +{ + struct netif *netif; + s8_t i; + + /* @todo decide if it makes sense to check the destination cache first */ + + /* Check if there is a matching on-link prefix. There may be multiple + * matches. Pick the first one that is associated with a suitable netif. */ + for (i = 0; i < LWIP_ND6_NUM_PREFIXES; ++i) { + netif = prefix_list[i].netif; + if ((netif != NULL) && ip6_addr_net_eq(&prefix_list[i].prefix, ip6addr) && + netif_is_up(netif) && netif_is_link_up(netif)) { + return netif; + } + } + + /* No on-link prefix match. Find a router that can forward the packet. */ + i = nd6_select_router(ip6addr, NULL); + if (i >= 0) { + LWIP_ASSERT("selected router must have a neighbor entry", + default_router_list[i].neighbor_entry != NULL); + return default_router_list[i].neighbor_entry->netif; + } + + return NULL; +} + +/** + * Find an entry for a default router. + * + * @param router_addr the IPv6 address of the router + * @param netif the netif on which the router is found, if known + * @return the index of the router entry, or -1 if not found + */ +static s8_t +nd6_get_router(const ip6_addr_t *router_addr, struct netif *netif) +{ + s8_t i; + + IP6_ADDR_ZONECHECK_NETIF(router_addr, netif); + + /* Look for router. */ + for (i = 0; i < LWIP_ND6_NUM_ROUTERS; i++) { + if ((default_router_list[i].neighbor_entry != NULL) && + ((netif != NULL) ? netif == default_router_list[i].neighbor_entry->netif : 1) && + ip6_addr_eq(router_addr, &(default_router_list[i].neighbor_entry->next_hop_address))) { + return i; + } + } + + /* router not found. */ + return -1; +} + +/** + * Create a new entry for a default router. + * + * @param router_addr the IPv6 address of the router + * @param netif the netif on which the router is connected, if known + * @return the index on the router table, or -1 if could not be created + */ +static s8_t +nd6_new_router(const ip6_addr_t *router_addr, struct netif *netif) +{ + s8_t router_index; + s8_t free_router_index; + s8_t neighbor_index; + + IP6_ADDR_ZONECHECK_NETIF(router_addr, netif); + + /* Do we have a neighbor entry for this router? */ + neighbor_index = nd6_find_neighbor_cache_entry(router_addr); + if (neighbor_index < 0) { + /* Create a neighbor entry for this router. */ + neighbor_index = nd6_new_neighbor_cache_entry(); + if (neighbor_index < 0) { + /* Could not create neighbor entry for this router. */ + return -1; + } + ip6_addr_set(&(neighbor_cache[neighbor_index].next_hop_address), router_addr); + neighbor_cache[neighbor_index].netif = netif; + neighbor_cache[neighbor_index].q = NULL; + neighbor_cache[neighbor_index].state = ND6_INCOMPLETE; + neighbor_cache[neighbor_index].counter.probes_sent = 1; + nd6_send_neighbor_cache_probe(&neighbor_cache[neighbor_index], ND6_SEND_FLAG_MULTICAST_DEST); + } + + /* Mark neighbor as router. */ + neighbor_cache[neighbor_index].isrouter = 1; + + /* Look for empty entry. */ + free_router_index = LWIP_ND6_NUM_ROUTERS; + for (router_index = LWIP_ND6_NUM_ROUTERS - 1; router_index >= 0; router_index--) { + /* check if router already exists (this is a special case for 2 netifs on the same subnet + - e.g. wifi and cable) */ + if(default_router_list[router_index].neighbor_entry == &(neighbor_cache[neighbor_index])){ + return router_index; + } + if (default_router_list[router_index].neighbor_entry == NULL) { + /* remember lowest free index to create a new entry */ + free_router_index = router_index; + } + } + if (free_router_index < LWIP_ND6_NUM_ROUTERS) { + default_router_list[free_router_index].neighbor_entry = &(neighbor_cache[neighbor_index]); + return free_router_index; + } + + /* Could not create a router entry. */ + + /* Mark neighbor entry as not-router. Entry might be useful as neighbor still. */ + neighbor_cache[neighbor_index].isrouter = 0; + + /* router not found. */ + return -1; +} + +/** + * Find the cached entry for an on-link prefix. + * + * @param prefix the IPv6 prefix that is on-link + * @param netif the netif on which the prefix is on-link + * @return the index on the prefix table, or -1 if not found + */ +static s8_t +nd6_get_onlink_prefix(const ip6_addr_t *prefix, struct netif *netif) +{ + s8_t i; + + /* Look for prefix in list. */ + for (i = 0; i < LWIP_ND6_NUM_PREFIXES; ++i) { + if ((ip6_addr_net_eq(&(prefix_list[i].prefix), prefix)) && + (prefix_list[i].netif == netif)) { + return i; + } + } + + /* Entry not available. */ + return -1; +} + +/** + * Creates a new entry for an on-link prefix. + * + * @param prefix the IPv6 prefix that is on-link + * @param netif the netif on which the prefix is on-link + * @return the index on the prefix table, or -1 if not created + */ +static s8_t +nd6_new_onlink_prefix(const ip6_addr_t *prefix, struct netif *netif) +{ + s8_t i; + + /* Create new entry. */ + for (i = 0; i < LWIP_ND6_NUM_PREFIXES; ++i) { + if ((prefix_list[i].netif == NULL) || + (prefix_list[i].invalidation_timer == 0)) { + /* Found empty prefix entry. */ + prefix_list[i].netif = netif; + ip6_addr_set(&(prefix_list[i].prefix), prefix); + return i; + } + } + + /* Entry not available. */ + return -1; +} + +/** + * Determine the next hop for a destination. Will determine if the + * destination is on-link, else a suitable on-link router is selected. + * + * The last entry index is cached for fast entry search. + * + * @param ip6addr the destination address + * @param netif the netif on which the packet will be sent + * @return the neighbor cache entry for the next hop, ERR_RTE if no + * suitable next hop was found, ERR_MEM if no cache entry + * could be created + */ +static s8_t +nd6_get_next_hop_entry(const ip6_addr_t *ip6addr, struct netif *netif) +{ +#ifdef LWIP_HOOK_ND6_GET_GW + const ip6_addr_t *next_hop_addr; +#endif /* LWIP_HOOK_ND6_GET_GW */ + s8_t i; + s16_t dst_idx; + struct nd6_destination_cache_entry *dest; + + IP6_ADDR_ZONECHECK_NETIF(ip6addr, netif); + +#if LWIP_NETIF_HWADDRHINT + if (netif->hints != NULL) { + /* per-pcb cached entry was given */ + netif_addr_idx_t addr_hint = netif->hints->addr_hint; + if (addr_hint < LWIP_ND6_NUM_DESTINATIONS) { + nd6_cached_destination_index = addr_hint; + } + } +#endif /* LWIP_NETIF_HWADDRHINT */ + + LWIP_ASSERT("sane cache index", nd6_cached_destination_index < LWIP_ND6_NUM_DESTINATIONS); + + /* Look for ip6addr in destination cache. */ + dest = &destination_cache[nd6_cached_destination_index]; + if (ip6_addr_eq(ip6addr, &dest->destination_addr)) { + /* the cached entry index is the right one! */ + /* do nothing. */ + ND6_STATS_INC(nd6.cachehit); + } else { + /* Search destination cache. */ + dst_idx = nd6_find_destination_cache_entry(ip6addr); + if (dst_idx >= 0) { + /* found destination entry. make it our new cached index. */ + LWIP_ASSERT("type overflow", (size_t)dst_idx < NETIF_ADDR_IDX_MAX); + nd6_cached_destination_index = (netif_addr_idx_t)dst_idx; + dest = &destination_cache[dst_idx]; + } else { + /* Not found. Create a new destination entry. */ + dst_idx = nd6_new_destination_cache_entry(); + if (dst_idx >= 0) { + /* got new destination entry. make it our new cached index. */ + LWIP_ASSERT("type overflow", (size_t)dst_idx < NETIF_ADDR_IDX_MAX); + nd6_cached_destination_index = (netif_addr_idx_t)dst_idx; + dest = &destination_cache[dst_idx]; + } else { + /* Could not create a destination cache entry. */ + return ERR_MEM; + } + + /* Copy dest address to destination cache. */ + ip6_addr_set(&dest->destination_addr, ip6addr); + + /* Now find the next hop. is it a neighbor? */ + if (ip6_addr_islinklocal(ip6addr) || + nd6_is_prefix_in_netif(ip6addr, netif)) { + /* Destination in local link. */ + dest->pmtu = netif_mtu6(netif); + ip6_addr_copy(dest->next_hop_addr, dest->destination_addr); +#ifdef LWIP_HOOK_ND6_GET_GW + } else if ((next_hop_addr = LWIP_HOOK_ND6_GET_GW(netif, ip6addr)) != NULL) { + /* Next hop for destination provided by hook function. */ + dest->pmtu = netif->mtu; + ip6_addr_set(&dest->next_hop_addr, next_hop_addr); +#endif /* LWIP_HOOK_ND6_GET_GW */ + } else { + /* We need to select a router. */ + i = nd6_select_router(ip6addr, netif); + if (i < 0) { + /* No router found. */ + ip6_addr_set_any(&dest->destination_addr); + return ERR_RTE; + } + dest->pmtu = netif_mtu6(netif); /* Start with netif mtu, correct through ICMPv6 if necessary */ + ip6_addr_copy(dest->next_hop_addr, default_router_list[i].neighbor_entry->next_hop_address); + } + } +#if LWIP_NETIF_HWADDRHINT + if (netif->hints != NULL) { + /* per-pcb cached entry was given */ + netif->hints->addr_hint = nd6_cached_destination_index; + } +#endif /* LWIP_NETIF_HWADDRHINT */ + } + + /* Look in neighbor cache for the next-hop address. */ + if (ip6_addr_eq(&dest->next_hop_addr, + &(neighbor_cache[dest->cached_neighbor_idx].next_hop_address))) { + /* Cache hit. */ + /* Do nothing. */ + ND6_STATS_INC(nd6.cachehit); + } else { + i = nd6_find_neighbor_cache_entry(&dest->next_hop_addr); + if (i >= 0) { + /* Found a matching record, make it new cached entry. */ + dest->cached_neighbor_idx = i; + } else { + /* Neighbor not in cache. Make a new entry. */ + i = nd6_new_neighbor_cache_entry(); + if (i >= 0) { + /* got new neighbor entry. make it our new cached index. */ + dest->cached_neighbor_idx = i; + } else { + /* Could not create a neighbor cache entry. */ + return ERR_MEM; + } + + /* Initialize fields. */ + ip6_addr_copy(neighbor_cache[i].next_hop_address, dest->next_hop_addr); + neighbor_cache[i].isrouter = 0; + neighbor_cache[i].netif = netif; + neighbor_cache[i].state = ND6_INCOMPLETE; + neighbor_cache[i].counter.probes_sent = 1; + nd6_send_neighbor_cache_probe(&neighbor_cache[i], ND6_SEND_FLAG_MULTICAST_DEST); + } + } + + /* Reset this destination's age. */ + dest->age = 0; + + return dest->cached_neighbor_idx; +} + +/** + * Queue a packet for a neighbor. + * + * @param neighbor_index the index in the neighbor cache table + * @param q packet to be queued + * @return ERR_OK if succeeded, ERR_MEM if out of memory + */ +static err_t +nd6_queue_packet(s8_t neighbor_index, struct pbuf *q) +{ + err_t result = ERR_MEM; + struct pbuf *p; + int copy_needed = 0; +#if LWIP_ND6_QUEUEING + struct nd6_q_entry *new_entry, *r; +#endif /* LWIP_ND6_QUEUEING */ + + if ((neighbor_index < 0) || (neighbor_index >= LWIP_ND6_NUM_NEIGHBORS)) { + return ERR_ARG; + } + + /* IF q includes a pbuf that must be copied, we have to copy the whole chain + * into a new PBUF_RAM. See the definition of PBUF_NEEDS_COPY for details. */ + p = q; + while (p) { + if (PBUF_NEEDS_COPY(p)) { + copy_needed = 1; + break; + } + p = p->next; + } + if (copy_needed) { + /* copy the whole packet into new pbufs */ + p = pbuf_clone(PBUF_LINK, PBUF_RAM, q); + while ((p == NULL) && (neighbor_cache[neighbor_index].q != NULL)) { + /* Free oldest packet (as per RFC recommendation) */ +#if LWIP_ND6_QUEUEING + r = neighbor_cache[neighbor_index].q; + neighbor_cache[neighbor_index].q = r->next; + r->next = NULL; + nd6_free_q(r); +#else /* LWIP_ND6_QUEUEING */ + pbuf_free(neighbor_cache[neighbor_index].q); + neighbor_cache[neighbor_index].q = NULL; +#endif /* LWIP_ND6_QUEUEING */ + p = pbuf_clone(PBUF_LINK, PBUF_RAM, q); + } + } else { + /* referencing the old pbuf is enough */ + p = q; + pbuf_ref(p); + } + /* packet was copied/ref'd? */ + if (p != NULL) { + /* queue packet ... */ +#if LWIP_ND6_QUEUEING + /* allocate a new nd6 queue entry */ + new_entry = NULL; + if (nd6_queue_size < MEMP_NUM_ND6_QUEUE) { + new_entry = (struct nd6_q_entry *)memp_malloc(MEMP_ND6_QUEUE); + nd6_queue_size++; + } + if ((new_entry == NULL) && (neighbor_cache[neighbor_index].q != NULL)) { + /* Free oldest packet (as per RFC recommendation) */ + r = neighbor_cache[neighbor_index].q; + neighbor_cache[neighbor_index].q = r->next; + r->next = NULL; + nd6_free_q(r); + new_entry = (struct nd6_q_entry *)memp_malloc(MEMP_ND6_QUEUE); + nd6_queue_size++; + } + if (new_entry != NULL) { + new_entry->next = NULL; + new_entry->p = p; + if (neighbor_cache[neighbor_index].q != NULL) { + /* queue was already existent, append the new entry to the end */ + r = neighbor_cache[neighbor_index].q; + while (r->next != NULL) { + r = r->next; + } + r->next = new_entry; + } else { + /* queue did not exist, first item in queue */ + neighbor_cache[neighbor_index].q = new_entry; + } + LWIP_DEBUGF(LWIP_DBG_TRACE, ("ipv6: queued packet %p on neighbor entry %"S16_F"\n", (void *)p, (s16_t)neighbor_index)); + result = ERR_OK; + } else { + /* the pool MEMP_ND6_QUEUE is empty */ + pbuf_free(p); + LWIP_DEBUGF(LWIP_DBG_TRACE, ("ipv6: could not queue a copy of packet %p (out of memory)\n", (void *)p)); + /* { result == ERR_MEM } through initialization */ + } +#else /* LWIP_ND6_QUEUEING */ + /* Queue a single packet. If an older packet is already queued, free it as per RFC. */ + if (neighbor_cache[neighbor_index].q != NULL) { + pbuf_free(neighbor_cache[neighbor_index].q); + } + neighbor_cache[neighbor_index].q = p; + LWIP_DEBUGF(LWIP_DBG_TRACE, ("ipv6: queued packet %p on neighbor entry %"S16_F"\n", (void *)p, (s16_t)neighbor_index)); + result = ERR_OK; +#endif /* LWIP_ND6_QUEUEING */ + } else { + LWIP_DEBUGF(LWIP_DBG_TRACE, ("ipv6: could not queue a copy of packet %p (out of memory)\n", (void *)q)); + /* { result == ERR_MEM } through initialization */ + } + + return result; +} + +#if LWIP_ND6_QUEUEING +/** + * Free a complete queue of nd6 q entries + * + * @param q a queue of nd6_q_entry to free + */ +static void +nd6_free_q(struct nd6_q_entry *q) +{ + struct nd6_q_entry *r; + LWIP_ASSERT("q != NULL", q != NULL); + LWIP_ASSERT("q->p != NULL", q->p != NULL); + while (q) { + r = q; + q = q->next; + LWIP_ASSERT("r->p != NULL", (r->p != NULL)); + pbuf_free(r->p); + memp_free(MEMP_ND6_QUEUE, r); + nd6_queue_size--; + } +} +#endif /* LWIP_ND6_QUEUEING */ + +/** + * Send queued packets for a neighbor + * + * @param i the neighbor to send packets to + */ +static void +nd6_send_q(s8_t i) +{ + struct ip6_hdr *ip6hdr; + ip6_addr_t dest; +#if LWIP_ND6_QUEUEING + struct nd6_q_entry *q; +#endif /* LWIP_ND6_QUEUEING */ + + if ((i < 0) || (i >= LWIP_ND6_NUM_NEIGHBORS)) { + return; + } + +#if LWIP_ND6_QUEUEING + while (neighbor_cache[i].q != NULL) { + /* remember first in queue */ + q = neighbor_cache[i].q; + /* pop first item off the queue */ + neighbor_cache[i].q = q->next; + /* Get ipv6 header. */ + ip6hdr = (struct ip6_hdr *)(q->p->payload); + /* Create an aligned copy. */ + ip6_addr_copy_from_packed(dest, ip6hdr->dest); + /* Restore the zone, if applicable. */ + ip6_addr_assign_zone(&dest, IP6_UNKNOWN, neighbor_cache[i].netif); + /* send the queued IPv6 packet */ + (neighbor_cache[i].netif)->output_ip6(neighbor_cache[i].netif, q->p, &dest); + /* free the queued IP packet */ + pbuf_free(q->p); + /* now queue entry can be freed */ + memp_free(MEMP_ND6_QUEUE, q); + nd6_queue_size--; + } +#else /* LWIP_ND6_QUEUEING */ + if (neighbor_cache[i].q != NULL) { + /* Get ipv6 header. */ + ip6hdr = (struct ip6_hdr *)(neighbor_cache[i].q->payload); + /* Create an aligned copy. */ + ip6_addr_copy_from_packed(dest, ip6hdr->dest); + /* Restore the zone, if applicable. */ + ip6_addr_assign_zone(&dest, IP6_UNKNOWN, neighbor_cache[i].netif); + /* send the queued IPv6 packet */ + (neighbor_cache[i].netif)->output_ip6(neighbor_cache[i].netif, neighbor_cache[i].q, &dest); + /* free the queued IP packet */ + pbuf_free(neighbor_cache[i].q); + neighbor_cache[i].q = NULL; + } +#endif /* LWIP_ND6_QUEUEING */ +} + +/** + * A packet is to be transmitted to a specific IPv6 destination on a specific + * interface. Check if we can find the hardware address of the next hop to use + * for the packet. If so, give the hardware address to the caller, which should + * use it to send the packet right away. Otherwise, enqueue the packet for + * later transmission while looking up the hardware address, if possible. + * + * As such, this function returns one of three different possible results: + * + * - ERR_OK with a non-NULL 'hwaddrp': the caller should send the packet now. + * - ERR_OK with a NULL 'hwaddrp': the packet has been enqueued for later. + * - not ERR_OK: something went wrong; forward the error upward in the stack. + * + * @param netif The lwIP network interface on which the IP packet will be sent. + * @param q The pbuf(s) containing the IP packet to be sent. + * @param ip6addr The destination IPv6 address of the packet. + * @param hwaddrp On success, filled with a pointer to a HW address or NULL (meaning + * the packet has been queued). + * @return + * - ERR_OK on success, ERR_RTE if no route was found for the packet, + * or ERR_MEM if low memory conditions prohibit sending the packet at all. + */ +err_t +nd6_get_next_hop_addr_or_queue(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr, const u8_t **hwaddrp) +{ + s8_t i; + + /* Get next hop record. */ + i = nd6_get_next_hop_entry(ip6addr, netif); + if (i < 0) { + /* failed to get a next hop neighbor record. */ + return i; + } + + /* Now that we have a destination record, send or queue the packet. */ + if (neighbor_cache[i].state == ND6_STALE) { + /* Switch to delay state. */ + neighbor_cache[i].state = ND6_DELAY; + neighbor_cache[i].counter.delay_time = LWIP_ND6_DELAY_FIRST_PROBE_TIME / ND6_TMR_INTERVAL; + } + /* @todo should we send or queue if PROBE? send for now, to let unicast NS pass. */ + if ((neighbor_cache[i].state == ND6_REACHABLE) || + (neighbor_cache[i].state == ND6_DELAY) || + (neighbor_cache[i].state == ND6_PROBE)) { + + /* Tell the caller to send out the packet now. */ + *hwaddrp = neighbor_cache[i].lladdr; + return ERR_OK; + } + + /* We should queue packet on this interface. */ + *hwaddrp = NULL; + return nd6_queue_packet(i, q); +} + + +/** + * Get the Path MTU for a destination. + * + * @param ip6addr the destination address + * @param netif the netif on which the packet will be sent + * @return the Path MTU, if known, or the netif default MTU + */ +u16_t +nd6_get_destination_mtu(const ip6_addr_t *ip6addr, struct netif *netif) +{ + s16_t i; + + i = nd6_find_destination_cache_entry(ip6addr); + if (i >= 0) { + if (destination_cache[i].pmtu > 0) { + return destination_cache[i].pmtu; + } + } + + if (netif != NULL) { + return netif_mtu6(netif); + } + + return IP6_MIN_MTU_LENGTH; /* Minimum MTU */ +} + + +#if LWIP_ND6_TCP_REACHABILITY_HINTS +/** + * Provide the Neighbor discovery process with a hint that a + * destination is reachable. Called by tcp_receive when ACKs are + * received or sent (as per RFC). This is useful to avoid sending + * NS messages every 30 seconds. + * + * @param ip6addr the destination address which is know to be reachable + * by an upper layer protocol (TCP) + */ +void +nd6_reachability_hint(const ip6_addr_t *ip6addr) +{ + s8_t i; + s16_t dst_idx; + struct nd6_destination_cache_entry *dest; + + /* Find destination in cache. */ + if (ip6_addr_eq(ip6addr, &(destination_cache[nd6_cached_destination_index].destination_addr))) { + dst_idx = nd6_cached_destination_index; + ND6_STATS_INC(nd6.cachehit); + } else { + dst_idx = nd6_find_destination_cache_entry(ip6addr); + } + if (dst_idx < 0) { + return; + } + + /* Find next hop neighbor in cache. */ + dest = &destination_cache[dst_idx]; + if (ip6_addr_eq(&dest->next_hop_addr, &(neighbor_cache[dest->cached_neighbor_idx].next_hop_address))) { + i = dest->cached_neighbor_idx; + ND6_STATS_INC(nd6.cachehit); + } else { + i = nd6_find_neighbor_cache_entry(&dest->next_hop_addr); + } + if (i < 0) { + return; + } + + /* For safety: don't set as reachable if we don't have a LL address yet. Misuse protection. */ + if (neighbor_cache[i].state == ND6_INCOMPLETE || neighbor_cache[i].state == ND6_NO_ENTRY) { + return; + } + + /* Set reachability state. */ + neighbor_cache[i].state = ND6_REACHABLE; + neighbor_cache[i].counter.reachable_time = reachable_time; +} +#endif /* LWIP_ND6_TCP_REACHABILITY_HINTS */ + +/** + * Remove all prefix, neighbor_cache and router entries of the specified netif. + * + * @param netif points to a network interface + */ +void +nd6_cleanup_netif(struct netif *netif) +{ + u8_t i; + s8_t router_index; + for (i = 0; i < LWIP_ND6_NUM_PREFIXES; i++) { + if (prefix_list[i].netif == netif) { + prefix_list[i].netif = NULL; + } + } + for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) { + if (neighbor_cache[i].netif == netif) { + for (router_index = 0; router_index < LWIP_ND6_NUM_ROUTERS; router_index++) { + if (default_router_list[router_index].neighbor_entry == &neighbor_cache[i]) { + default_router_list[router_index].neighbor_entry = NULL; + default_router_list[router_index].flags = 0; + } + } + neighbor_cache[i].isrouter = 0; + nd6_free_neighbor_cache_entry(i); + } + } + /* Clear the destination cache, since many entries may now have become + * invalid for one of several reasons. As destination cache entries have no + * netif association, use a sledgehammer approach (this can be improved). */ + nd6_clear_destination_cache(); +} + +#if LWIP_IPV6_MLD +/** + * The state of a local IPv6 address entry is about to change. If needed, join + * or leave the solicited-node multicast group for the address. + * + * @param netif The netif that owns the address. + * @param addr_idx The index of the address. + * @param new_state The new (IP6_ADDR_) state for the address. + */ +void +nd6_adjust_mld_membership(struct netif *netif, s8_t addr_idx, u8_t new_state) +{ + u8_t old_state, old_member, new_member; + + old_state = netif_ip6_addr_state(netif, addr_idx); + + /* Determine whether we were, and should be, a member of the solicited-node + * multicast group for this address. For tentative addresses, the group is + * not joined until the address enters the TENTATIVE_1 (or VALID) state. */ + old_member = (old_state != IP6_ADDR_INVALID && old_state != IP6_ADDR_DUPLICATED && old_state != IP6_ADDR_TENTATIVE); + new_member = (new_state != IP6_ADDR_INVALID && new_state != IP6_ADDR_DUPLICATED && new_state != IP6_ADDR_TENTATIVE); + + if (old_member != new_member) { + ip6_addr_set_solicitednode(&multicast_address, netif_ip6_addr(netif, addr_idx)->addr[3]); + ip6_addr_assign_zone(&multicast_address, IP6_MULTICAST, netif); + + if (new_member) { + mld6_joingroup_netif(netif, &multicast_address); + } else { + mld6_leavegroup_netif(netif, &multicast_address); + } + } +} +#endif /* LWIP_IPV6_MLD */ + +/** Netif was added, set up, or reconnected (link up) */ +void +nd6_restart_netif(struct netif *netif) +{ +#if LWIP_IPV6_SEND_ROUTER_SOLICIT + /* Send Router Solicitation messages (see RFC 4861, ch. 6.3.7). */ + netif->rs_count = LWIP_ND6_MAX_MULTICAST_SOLICIT; +#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */ +} + +#endif /* LWIP_IPV6 */ diff --git a/lib/lwip/core/mem.c b/lib/lwip/core/mem.c new file mode 100644 index 0000000000..8566edce55 --- /dev/null +++ b/lib/lwip/core/mem.c @@ -0,0 +1,1017 @@ +/** + * @file + * Dynamic memory manager + * + * This is a lightweight replacement for the standard C library malloc(). + * + * If you want to use the standard C library malloc() instead, define + * MEM_LIBC_MALLOC to 1 in your lwipopts.h + * + * To let mem_malloc() use pools (prevents fragmentation and is much faster than + * a heap but might waste some memory), define MEM_USE_POOLS to 1, define + * MEMP_USE_CUSTOM_POOLS to 1 and create a file "lwippools.h" that includes a list + * of pools like this (more pools can be added between _START and _END): + * + * Define three pools with sizes 256, 512, and 1512 bytes + * LWIP_MALLOC_MEMPOOL_START + * LWIP_MALLOC_MEMPOOL(20, 256) + * LWIP_MALLOC_MEMPOOL(10, 512) + * LWIP_MALLOC_MEMPOOL(5, 1512) + * LWIP_MALLOC_MEMPOOL_END + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * Simon Goldschmidt + * + */ + +#include "lwip/opt.h" +#include "lwip/mem.h" +#include "lwip/def.h" +#include "lwip/sys.h" +#include "lwip/stats.h" +#include "lwip/err.h" + +#include <string.h> + +#if MEM_LIBC_MALLOC +#include <stdlib.h> /* for malloc()/free() */ +#endif + +/* This is overridable for tests only... */ +#ifndef LWIP_MEM_ILLEGAL_FREE +#define LWIP_MEM_ILLEGAL_FREE(msg) LWIP_ASSERT(msg, 0) +#endif + +#define MEM_STATS_INC_LOCKED(x) SYS_ARCH_LOCKED(MEM_STATS_INC(x)) +#define MEM_STATS_INC_USED_LOCKED(x, y) SYS_ARCH_LOCKED(MEM_STATS_INC_USED(x, y)) +#define MEM_STATS_DEC_USED_LOCKED(x, y) SYS_ARCH_LOCKED(MEM_STATS_DEC_USED(x, y)) + +#if MEM_OVERFLOW_CHECK +#define MEM_SANITY_OFFSET MEM_SANITY_REGION_BEFORE_ALIGNED +#define MEM_SANITY_OVERHEAD (MEM_SANITY_REGION_BEFORE_ALIGNED + MEM_SANITY_REGION_AFTER_ALIGNED) +#else +#define MEM_SANITY_OFFSET 0 +#define MEM_SANITY_OVERHEAD 0 +#endif + +#if MEM_OVERFLOW_CHECK || MEMP_OVERFLOW_CHECK +/** + * Check if a mep element was victim of an overflow or underflow + * (e.g. the restricted area after/before it has been altered) + * + * @param p the mem element to check + * @param size allocated size of the element + * @param descr1 description of the element source shown on error + * @param descr2 description of the element source shown on error + */ +void +mem_overflow_check_raw(void *p, size_t size, const char *descr1, const char *descr2) +{ +#if MEM_SANITY_REGION_AFTER_ALIGNED || MEM_SANITY_REGION_BEFORE_ALIGNED + u16_t k; + u8_t *m; + +#if MEM_SANITY_REGION_AFTER_ALIGNED > 0 + m = (u8_t *)p + size; + for (k = 0; k < MEM_SANITY_REGION_AFTER_ALIGNED; k++) { + if (m[k] != 0xcd) { + char errstr[128]; + snprintf(errstr, sizeof(errstr), "detected mem overflow in %s%s", descr1, descr2); + LWIP_ASSERT(errstr, 0); + } + } +#endif /* MEM_SANITY_REGION_AFTER_ALIGNED > 0 */ + +#if MEM_SANITY_REGION_BEFORE_ALIGNED > 0 + m = (u8_t *)p - MEM_SANITY_REGION_BEFORE_ALIGNED; + for (k = 0; k < MEM_SANITY_REGION_BEFORE_ALIGNED; k++) { + if (m[k] != 0xcd) { + char errstr[128]; + snprintf(errstr, sizeof(errstr), "detected mem underflow in %s%s", descr1, descr2); + LWIP_ASSERT(errstr, 0); + } + } +#endif /* MEM_SANITY_REGION_BEFORE_ALIGNED > 0 */ +#else + LWIP_UNUSED_ARG(p); + LWIP_UNUSED_ARG(desc); + LWIP_UNUSED_ARG(descr); +#endif +} + +/** + * Initialize the restricted area of a mem element. + */ +void +mem_overflow_init_raw(void *p, size_t size) +{ +#if MEM_SANITY_REGION_BEFORE_ALIGNED > 0 || MEM_SANITY_REGION_AFTER_ALIGNED > 0 + u8_t *m; +#if MEM_SANITY_REGION_BEFORE_ALIGNED > 0 + m = (u8_t *)p - MEM_SANITY_REGION_BEFORE_ALIGNED; + memset(m, 0xcd, MEM_SANITY_REGION_BEFORE_ALIGNED); +#endif +#if MEM_SANITY_REGION_AFTER_ALIGNED > 0 + m = (u8_t *)p + size; + memset(m, 0xcd, MEM_SANITY_REGION_AFTER_ALIGNED); +#endif +#else /* MEM_SANITY_REGION_BEFORE_ALIGNED > 0 || MEM_SANITY_REGION_AFTER_ALIGNED > 0 */ + LWIP_UNUSED_ARG(p); + LWIP_UNUSED_ARG(desc); +#endif /* MEM_SANITY_REGION_BEFORE_ALIGNED > 0 || MEM_SANITY_REGION_AFTER_ALIGNED > 0 */ +} +#endif /* MEM_OVERFLOW_CHECK || MEMP_OVERFLOW_CHECK */ + +#if MEM_LIBC_MALLOC || MEM_USE_POOLS + +/** mem_init is not used when using pools instead of a heap or using + * C library malloc(). + */ +void +mem_init(void) +{ +} + +/** mem_trim is not used when using pools instead of a heap or using + * C library malloc(): we can't free part of a pool element and the stack + * support mem_trim() to return a different pointer + */ +void * +mem_trim(void *mem, mem_size_t size) +{ + LWIP_UNUSED_ARG(size); + return mem; +} +#endif /* MEM_LIBC_MALLOC || MEM_USE_POOLS */ + +#if MEM_LIBC_MALLOC +/* lwIP heap implemented using C library malloc() */ + +/* in case C library malloc() needs extra protection, + * allow these defines to be overridden. + */ +#ifndef mem_clib_free +#define mem_clib_free free +#endif +#ifndef mem_clib_malloc +#define mem_clib_malloc malloc +#endif +#ifndef mem_clib_calloc +#define mem_clib_calloc calloc +#endif + +#if LWIP_STATS && MEM_STATS +#define MEM_LIBC_STATSHELPER_SIZE LWIP_MEM_ALIGN_SIZE(sizeof(mem_size_t)) +#else +#define MEM_LIBC_STATSHELPER_SIZE 0 +#endif + +/** + * Allocate a block of memory with a minimum of 'size' bytes. + * + * @param size is the minimum size of the requested block in bytes. + * @return pointer to allocated memory or NULL if no free memory was found. + * + * Note that the returned value must always be aligned (as defined by MEM_ALIGNMENT). + */ +void * +mem_malloc(mem_size_t size) +{ + void *ret = mem_clib_malloc(size + MEM_LIBC_STATSHELPER_SIZE); + if (ret == NULL) { + MEM_STATS_INC_LOCKED(err); + } else { + LWIP_ASSERT("malloc() must return aligned memory", LWIP_MEM_ALIGN(ret) == ret); +#if LWIP_STATS && MEM_STATS + *(mem_size_t *)ret = size; + ret = (u8_t *)ret + MEM_LIBC_STATSHELPER_SIZE; + MEM_STATS_INC_USED_LOCKED(used, size); +#endif + } + return ret; +} + +/** Put memory back on the heap + * + * @param rmem is the pointer as returned by a previous call to mem_malloc() + */ +void +mem_free(void *rmem) +{ + LWIP_ASSERT("rmem != NULL", (rmem != NULL)); + LWIP_ASSERT("rmem == MEM_ALIGN(rmem)", (rmem == LWIP_MEM_ALIGN(rmem))); +#if LWIP_STATS && MEM_STATS + rmem = (u8_t *)rmem - MEM_LIBC_STATSHELPER_SIZE; + MEM_STATS_DEC_USED_LOCKED(used, *(mem_size_t *)rmem); +#endif + mem_clib_free(rmem); +} + +#elif MEM_USE_POOLS + +/* lwIP heap implemented with different sized pools */ + +/** + * Allocate memory: determine the smallest pool that is big enough + * to contain an element of 'size' and get an element from that pool. + * + * @param size the size in bytes of the memory needed + * @return a pointer to the allocated memory or NULL if the pool is empty + */ +void * +mem_malloc(mem_size_t size) +{ + void *ret; + struct memp_malloc_helper *element = NULL; + memp_t poolnr; + mem_size_t required_size = size + LWIP_MEM_ALIGN_SIZE(sizeof(struct memp_malloc_helper)); + + for (poolnr = MEMP_POOL_FIRST; poolnr <= MEMP_POOL_LAST; poolnr = (memp_t)(poolnr + 1)) { + /* is this pool big enough to hold an element of the required size + plus a struct memp_malloc_helper that saves the pool this element came from? */ + if (required_size <= memp_pools[poolnr]->size) { + element = (struct memp_malloc_helper *)memp_malloc(poolnr); + if (element == NULL) { + /* No need to DEBUGF or ASSERT: This error is already taken care of in memp.c */ +#if MEM_USE_POOLS_TRY_BIGGER_POOL + /** Try a bigger pool if this one is empty! */ + if (poolnr < MEMP_POOL_LAST) { + continue; + } +#endif /* MEM_USE_POOLS_TRY_BIGGER_POOL */ + MEM_STATS_INC_LOCKED(err); + return NULL; + } + break; + } + } + if (poolnr > MEMP_POOL_LAST) { + LWIP_ASSERT("mem_malloc(): no pool is that big!", 0); + MEM_STATS_INC_LOCKED(err); + return NULL; + } + + /* save the pool number this element came from */ + element->poolnr = poolnr; + /* and return a pointer to the memory directly after the struct memp_malloc_helper */ + ret = (u8_t *)element + LWIP_MEM_ALIGN_SIZE(sizeof(struct memp_malloc_helper)); + +#if MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS) + /* truncating to u16_t is safe because struct memp_desc::size is u16_t */ + element->size = (u16_t)size; + MEM_STATS_INC_USED_LOCKED(used, element->size); +#endif /* MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS) */ +#if MEMP_OVERFLOW_CHECK + /* initialize unused memory (diff between requested size and selected pool's size) */ + memset((u8_t *)ret + size, 0xcd, memp_pools[poolnr]->size - size); +#endif /* MEMP_OVERFLOW_CHECK */ + return ret; +} + +/** + * Free memory previously allocated by mem_malloc. Loads the pool number + * and calls memp_free with that pool number to put the element back into + * its pool + * + * @param rmem the memory element to free + */ +void +mem_free(void *rmem) +{ + struct memp_malloc_helper *hmem; + + LWIP_ASSERT("rmem != NULL", (rmem != NULL)); + LWIP_ASSERT("rmem == MEM_ALIGN(rmem)", (rmem == LWIP_MEM_ALIGN(rmem))); + + /* get the original struct memp_malloc_helper */ + /* cast through void* to get rid of alignment warnings */ + hmem = (struct memp_malloc_helper *)(void *)((u8_t *)rmem - LWIP_MEM_ALIGN_SIZE(sizeof(struct memp_malloc_helper))); + + LWIP_ASSERT("hmem != NULL", (hmem != NULL)); + LWIP_ASSERT("hmem == MEM_ALIGN(hmem)", (hmem == LWIP_MEM_ALIGN(hmem))); + LWIP_ASSERT("hmem->poolnr < MEMP_MAX", (hmem->poolnr < MEMP_MAX)); + + MEM_STATS_DEC_USED_LOCKED(used, hmem->size); +#if MEMP_OVERFLOW_CHECK + { + u16_t i; + LWIP_ASSERT("MEM_USE_POOLS: invalid chunk size", + hmem->size <= memp_pools[hmem->poolnr]->size); + /* check that unused memory remained untouched (diff between requested size and selected pool's size) */ + for (i = hmem->size; i < memp_pools[hmem->poolnr]->size; i++) { + u8_t data = *((u8_t *)rmem + i); + LWIP_ASSERT("MEM_USE_POOLS: mem overflow detected", data == 0xcd); + } + } +#endif /* MEMP_OVERFLOW_CHECK */ + + /* and put it in the pool we saved earlier */ + memp_free(hmem->poolnr, hmem); +} + +#else /* MEM_USE_POOLS */ +/* lwIP replacement for your libc malloc() */ + +/** + * The heap is made up as a list of structs of this type. + * This does not have to be aligned since for getting its size, + * we only use the macro SIZEOF_STRUCT_MEM, which automatically aligns. + */ +struct mem { + /** index (-> ram[next]) of the next struct */ + mem_size_t next; + /** index (-> ram[prev]) of the previous struct */ + mem_size_t prev; + /** 1: this area is used; 0: this area is unused */ + u8_t used; +#if MEM_OVERFLOW_CHECK + /** this keeps track of the user allocation size for guard checks */ + mem_size_t user_size; +#endif +}; + +/** All allocated blocks will be MIN_SIZE bytes big, at least! + * MIN_SIZE can be overridden to suit your needs. Smaller values save space, + * larger values could prevent too small blocks to fragment the RAM too much. */ +#ifndef MIN_SIZE +#define MIN_SIZE 12 +#endif /* MIN_SIZE */ +/* some alignment macros: we define them here for better source code layout */ +#define MIN_SIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(MIN_SIZE) +#define SIZEOF_STRUCT_MEM LWIP_MEM_ALIGN_SIZE(sizeof(struct mem)) +#define MEM_SIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEM_SIZE) + +/** If you want to relocate the heap to external memory, simply define + * LWIP_RAM_HEAP_POINTER as a void-pointer to that location. + * If so, make sure the memory at that location is big enough (see below on + * how that space is calculated). */ +#ifndef LWIP_RAM_HEAP_POINTER +/** the heap. we need one struct mem at the end and some room for alignment */ +LWIP_DECLARE_MEMORY_ALIGNED(ram_heap, MEM_SIZE_ALIGNED + (2U * SIZEOF_STRUCT_MEM)); +#define LWIP_RAM_HEAP_POINTER ram_heap +#endif /* LWIP_RAM_HEAP_POINTER */ + +/** pointer to the heap (ram_heap): for alignment, ram is now a pointer instead of an array */ +static u8_t *ram; +/** the last entry, always unused! */ +static struct mem *ram_end; + +/** concurrent access protection */ +#if !NO_SYS +static sys_mutex_t mem_mutex; +#endif + +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT + +static volatile u8_t mem_free_count; + +/* Allow mem_free from other (e.g. interrupt) context */ +#define LWIP_MEM_FREE_DECL_PROTECT() SYS_ARCH_DECL_PROTECT(lev_free) +#define LWIP_MEM_FREE_PROTECT() SYS_ARCH_PROTECT(lev_free) +#define LWIP_MEM_FREE_UNPROTECT() SYS_ARCH_UNPROTECT(lev_free) +#define LWIP_MEM_ALLOC_DECL_PROTECT() SYS_ARCH_DECL_PROTECT(lev_alloc) +#define LWIP_MEM_ALLOC_PROTECT() SYS_ARCH_PROTECT(lev_alloc) +#define LWIP_MEM_ALLOC_UNPROTECT() SYS_ARCH_UNPROTECT(lev_alloc) +#define LWIP_MEM_LFREE_VOLATILE volatile + +#else /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + +/* Protect the heap only by using a mutex */ +#define LWIP_MEM_FREE_DECL_PROTECT() +#define LWIP_MEM_FREE_PROTECT() sys_mutex_lock(&mem_mutex) +#define LWIP_MEM_FREE_UNPROTECT() sys_mutex_unlock(&mem_mutex) +/* mem_malloc is protected using mutex AND LWIP_MEM_ALLOC_PROTECT */ +#define LWIP_MEM_ALLOC_DECL_PROTECT() +#define LWIP_MEM_ALLOC_PROTECT() +#define LWIP_MEM_ALLOC_UNPROTECT() +#define LWIP_MEM_LFREE_VOLATILE + +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + +/** pointer to the lowest free block, this is used for faster search */ +static struct mem * LWIP_MEM_LFREE_VOLATILE lfree; + +#if MEM_SANITY_CHECK +static void mem_sanity(void); +#define MEM_SANITY() mem_sanity() +#else +#define MEM_SANITY() +#endif + +#if MEM_OVERFLOW_CHECK +static void +mem_overflow_init_element(struct mem *mem, mem_size_t user_size) +{ + void *p = (u8_t *)mem + SIZEOF_STRUCT_MEM + MEM_SANITY_OFFSET; + mem->user_size = user_size; + mem_overflow_init_raw(p, user_size); +} + +static void +mem_overflow_check_element(struct mem *mem) +{ + void *p = (u8_t *)mem + SIZEOF_STRUCT_MEM + MEM_SANITY_OFFSET; + mem_overflow_check_raw(p, mem->user_size, "heap", ""); +} +#else /* MEM_OVERFLOW_CHECK */ +#define mem_overflow_init_element(mem, size) +#define mem_overflow_check_element(mem) +#endif /* MEM_OVERFLOW_CHECK */ + +static struct mem * +ptr_to_mem(mem_size_t ptr) +{ + return (struct mem *)(void *)&ram[ptr]; +} + +static mem_size_t +mem_to_ptr(void *mem) +{ + return (mem_size_t)((u8_t *)mem - ram); +} + +/** + * "Plug holes" by combining adjacent empty struct mems. + * After this function is through, there should not exist + * one empty struct mem pointing to another empty struct mem. + * + * @param mem this points to a struct mem which just has been freed + * @internal this function is only called by mem_free() and mem_trim() + * + * This assumes access to the heap is protected by the calling function + * already. + */ +static void +plug_holes(struct mem *mem) +{ + struct mem *nmem; + struct mem *pmem; + + LWIP_ASSERT("plug_holes: mem >= ram", (u8_t *)mem >= ram); + LWIP_ASSERT("plug_holes: mem < ram_end", (u8_t *)mem < (u8_t *)ram_end); + LWIP_ASSERT("plug_holes: mem->used == 0", mem->used == 0); + + /* plug hole forward */ + LWIP_ASSERT("plug_holes: mem->next <= MEM_SIZE_ALIGNED", mem->next <= MEM_SIZE_ALIGNED); + + nmem = ptr_to_mem(mem->next); + if (mem != nmem && nmem->used == 0 && (u8_t *)nmem != (u8_t *)ram_end) { + /* if mem->next is unused and not end of ram, combine mem and mem->next */ + if (lfree == nmem) { + lfree = mem; + } + mem->next = nmem->next; + if (nmem->next != MEM_SIZE_ALIGNED) { + ptr_to_mem(nmem->next)->prev = mem_to_ptr(mem); + } + } + + /* plug hole backward */ + pmem = ptr_to_mem(mem->prev); + if (pmem != mem && pmem->used == 0) { + /* if mem->prev is unused, combine mem and mem->prev */ + if (lfree == mem) { + lfree = pmem; + } + pmem->next = mem->next; + if (mem->next != MEM_SIZE_ALIGNED) { + ptr_to_mem(mem->next)->prev = mem_to_ptr(pmem); + } + } +} + +/** + * Zero the heap and initialize start, end and lowest-free + */ +void +mem_init(void) +{ + struct mem *mem; + + LWIP_ASSERT("Sanity check alignment", + (SIZEOF_STRUCT_MEM & (MEM_ALIGNMENT - 1)) == 0); + + /* align the heap */ + ram = (u8_t *)LWIP_MEM_ALIGN(LWIP_RAM_HEAP_POINTER); + /* initialize the start of the heap */ + mem = (struct mem *)(void *)ram; + mem->next = MEM_SIZE_ALIGNED; + mem->prev = 0; + mem->used = 0; + /* initialize the end of the heap */ + ram_end = ptr_to_mem(MEM_SIZE_ALIGNED); + ram_end->used = 1; + ram_end->next = MEM_SIZE_ALIGNED; + ram_end->prev = MEM_SIZE_ALIGNED; + MEM_SANITY(); + + /* initialize the lowest-free pointer to the start of the heap */ + lfree = (struct mem *)(void *)ram; + + MEM_STATS_AVAIL(avail, MEM_SIZE_ALIGNED); + + if (sys_mutex_new(&mem_mutex) != ERR_OK) { + LWIP_ASSERT("failed to create mem_mutex", 0); + } +} + +/* Check if a struct mem is correctly linked. + * If not, double-free is a possible reason. + */ +static int +mem_link_valid(struct mem *mem) +{ + struct mem *nmem, *pmem; + mem_size_t rmem_idx; + rmem_idx = mem_to_ptr(mem); + nmem = ptr_to_mem(mem->next); + pmem = ptr_to_mem(mem->prev); + if ((mem->next > MEM_SIZE_ALIGNED) || (mem->prev > MEM_SIZE_ALIGNED) || + ((mem->prev != rmem_idx) && (pmem->next != rmem_idx)) || + ((nmem != ram_end) && (nmem->prev != rmem_idx))) { + return 0; + } + return 1; +} + +#if MEM_SANITY_CHECK +static void +mem_sanity(void) +{ + struct mem *mem; + u8_t last_used; + + /* begin with first element here */ + mem = (struct mem *)ram; + LWIP_ASSERT("heap element used valid", (mem->used == 0) || (mem->used == 1)); + last_used = mem->used; + LWIP_ASSERT("heap element prev ptr valid", mem->prev == 0); + LWIP_ASSERT("heap element next ptr valid", mem->next <= MEM_SIZE_ALIGNED); + LWIP_ASSERT("heap element next ptr aligned", LWIP_MEM_ALIGN(ptr_to_mem(mem->next) == ptr_to_mem(mem->next))); + + /* check all elements before the end of the heap */ + for (mem = ptr_to_mem(mem->next); + ((u8_t *)mem > ram) && (mem < ram_end); + mem = ptr_to_mem(mem->next)) { + LWIP_ASSERT("heap element aligned", LWIP_MEM_ALIGN(mem) == mem); + LWIP_ASSERT("heap element prev ptr valid", mem->prev <= MEM_SIZE_ALIGNED); + LWIP_ASSERT("heap element next ptr valid", mem->next <= MEM_SIZE_ALIGNED); + LWIP_ASSERT("heap element prev ptr aligned", LWIP_MEM_ALIGN(ptr_to_mem(mem->prev) == ptr_to_mem(mem->prev))); + LWIP_ASSERT("heap element next ptr aligned", LWIP_MEM_ALIGN(ptr_to_mem(mem->next) == ptr_to_mem(mem->next))); + + if (last_used == 0) { + /* 2 unused elements in a row? */ + LWIP_ASSERT("heap element unused?", mem->used == 1); + } else { + LWIP_ASSERT("heap element unused member", (mem->used == 0) || (mem->used == 1)); + } + + LWIP_ASSERT("heap element link valid", mem_link_valid(mem)); + + /* used/unused altering */ + last_used = mem->used; + } + LWIP_ASSERT("heap end ptr sanity", mem == ptr_to_mem(MEM_SIZE_ALIGNED)); + LWIP_ASSERT("heap element used valid", mem->used == 1); + LWIP_ASSERT("heap element prev ptr valid", mem->prev == MEM_SIZE_ALIGNED); + LWIP_ASSERT("heap element next ptr valid", mem->next == MEM_SIZE_ALIGNED); +} +#endif /* MEM_SANITY_CHECK */ + +/** + * Put a struct mem back on the heap + * + * @param rmem is the data portion of a struct mem as returned by a previous + * call to mem_malloc() + */ +void +mem_free(void *rmem) +{ + struct mem *mem; + LWIP_MEM_FREE_DECL_PROTECT(); + + if (rmem == NULL) { + LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("mem_free(p == NULL) was called.\n")); + return; + } + if ((((mem_ptr_t)rmem) & (MEM_ALIGNMENT - 1)) != 0) { + LWIP_MEM_ILLEGAL_FREE("mem_free: sanity check alignment"); + LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("mem_free: sanity check alignment\n")); + /* protect mem stats from concurrent access */ + MEM_STATS_INC_LOCKED(illegal); + return; + } + + /* Get the corresponding struct mem: */ + /* cast through void* to get rid of alignment warnings */ + mem = (struct mem *)(void *)((u8_t *)rmem - (SIZEOF_STRUCT_MEM + MEM_SANITY_OFFSET)); + + if ((u8_t *)mem < ram || (u8_t *)rmem + MIN_SIZE_ALIGNED > (u8_t *)ram_end) { + LWIP_MEM_ILLEGAL_FREE("mem_free: illegal memory"); + LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("mem_free: illegal memory\n")); + /* protect mem stats from concurrent access */ + MEM_STATS_INC_LOCKED(illegal); + return; + } +#if MEM_OVERFLOW_CHECK + mem_overflow_check_element(mem); +#endif + /* protect the heap from concurrent access */ + LWIP_MEM_FREE_PROTECT(); + /* mem has to be in a used state */ + if (!mem->used) { + LWIP_MEM_ILLEGAL_FREE("mem_free: illegal memory: double free"); + LWIP_MEM_FREE_UNPROTECT(); + LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("mem_free: illegal memory: double free?\n")); + /* protect mem stats from concurrent access */ + MEM_STATS_INC_LOCKED(illegal); + return; + } + + if (!mem_link_valid(mem)) { + LWIP_MEM_ILLEGAL_FREE("mem_free: illegal memory: non-linked: double free"); + LWIP_MEM_FREE_UNPROTECT(); + LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("mem_free: illegal memory: non-linked: double free?\n")); + /* protect mem stats from concurrent access */ + MEM_STATS_INC_LOCKED(illegal); + return; + } + + /* mem is now unused. */ + mem->used = 0; + + if (mem < lfree) { + /* the newly freed struct is now the lowest */ + lfree = mem; + } + + MEM_STATS_DEC_USED(used, mem->next - (mem_size_t)(((u8_t *)mem - ram))); + + /* finally, see if prev or next are free also */ + plug_holes(mem); + MEM_SANITY(); +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT + mem_free_count = 1; +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + LWIP_MEM_FREE_UNPROTECT(); +} + +/** + * Shrink memory returned by mem_malloc(). + * + * @param rmem pointer to memory allocated by mem_malloc the is to be shrunk + * @param new_size required size after shrinking (needs to be smaller than or + * equal to the previous size) + * @return for compatibility reasons: is always == rmem, at the moment + * or NULL if newsize is > old size, in which case rmem is NOT touched + * or freed! + */ +void * +mem_trim(void *rmem, mem_size_t new_size) +{ + mem_size_t size, newsize; + mem_size_t ptr, ptr2; + struct mem *mem, *mem2; + /* use the FREE_PROTECT here: it protects with sem OR SYS_ARCH_PROTECT */ + LWIP_MEM_FREE_DECL_PROTECT(); + + /* Expand the size of the allocated memory region so that we can + adjust for alignment. */ + newsize = (mem_size_t)LWIP_MEM_ALIGN_SIZE(new_size); + if (newsize < MIN_SIZE_ALIGNED) { + /* every data block must be at least MIN_SIZE_ALIGNED long */ + newsize = MIN_SIZE_ALIGNED; + } +#if MEM_OVERFLOW_CHECK + newsize += MEM_SANITY_REGION_BEFORE_ALIGNED + MEM_SANITY_REGION_AFTER_ALIGNED; +#endif + if ((newsize > MEM_SIZE_ALIGNED) || (newsize < new_size)) { + return NULL; + } + + LWIP_ASSERT("mem_trim: legal memory", (u8_t *)rmem >= (u8_t *)ram && + (u8_t *)rmem < (u8_t *)ram_end); + + if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) { + LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("mem_trim: illegal memory\n")); + /* protect mem stats from concurrent access */ + MEM_STATS_INC_LOCKED(illegal); + return rmem; + } + /* Get the corresponding struct mem ... */ + /* cast through void* to get rid of alignment warnings */ + mem = (struct mem *)(void *)((u8_t *)rmem - (SIZEOF_STRUCT_MEM + MEM_SANITY_OFFSET)); +#if MEM_OVERFLOW_CHECK + mem_overflow_check_element(mem); +#endif + /* ... and its offset pointer */ + ptr = mem_to_ptr(mem); + + size = (mem_size_t)((mem_size_t)(mem->next - ptr) - (SIZEOF_STRUCT_MEM + MEM_SANITY_OVERHEAD)); + LWIP_ASSERT("mem_trim can only shrink memory", newsize <= size); + if (newsize > size) { + /* not supported */ + return NULL; + } + if (newsize == size) { + /* No change in size, simply return */ + return rmem; + } + + /* protect the heap from concurrent access */ + LWIP_MEM_FREE_PROTECT(); + + mem2 = ptr_to_mem(mem->next); + if (mem2->used == 0) { + /* The next struct is unused, we can simply move it at little */ + mem_size_t next; + LWIP_ASSERT("invalid next ptr", mem->next != MEM_SIZE_ALIGNED); + /* remember the old next pointer */ + next = mem2->next; + /* create new struct mem which is moved directly after the shrunk mem */ + ptr2 = (mem_size_t)(ptr + SIZEOF_STRUCT_MEM + newsize); + if (lfree == mem2) { + lfree = ptr_to_mem(ptr2); + } + mem2 = ptr_to_mem(ptr2); + mem2->used = 0; + /* restore the next pointer */ + mem2->next = next; + /* link it back to mem */ + mem2->prev = ptr; + /* link mem to it */ + mem->next = ptr2; + /* last thing to restore linked list: as we have moved mem2, + * let 'mem2->next->prev' point to mem2 again. but only if mem2->next is not + * the end of the heap */ + if (mem2->next != MEM_SIZE_ALIGNED) { + ptr_to_mem(mem2->next)->prev = ptr2; + } + MEM_STATS_DEC_USED(used, (size - newsize)); + /* no need to plug holes, we've already done that */ + } else if (newsize + SIZEOF_STRUCT_MEM + MIN_SIZE_ALIGNED <= size) { + /* Next struct is used but there's room for another struct mem with + * at least MIN_SIZE_ALIGNED of data. + * Old size ('size') must be big enough to contain at least 'newsize' plus a struct mem + * ('SIZEOF_STRUCT_MEM') with some data ('MIN_SIZE_ALIGNED'). + * @todo we could leave out MIN_SIZE_ALIGNED. We would create an empty + * region that couldn't hold data, but when mem->next gets freed, + * the 2 regions would be combined, resulting in more free memory */ + ptr2 = (mem_size_t)(ptr + SIZEOF_STRUCT_MEM + newsize); + LWIP_ASSERT("invalid next ptr", mem->next != MEM_SIZE_ALIGNED); + mem2 = ptr_to_mem(ptr2); + if (mem2 < lfree) { + lfree = mem2; + } + mem2->used = 0; + mem2->next = mem->next; + mem2->prev = ptr; + mem->next = ptr2; + if (mem2->next != MEM_SIZE_ALIGNED) { + ptr_to_mem(mem2->next)->prev = ptr2; + } + MEM_STATS_DEC_USED(used, (size - newsize)); + /* the original mem->next is used, so no need to plug holes! */ + } + /* else { + next struct mem is used but size between mem and mem2 is not big enough + to create another struct mem + -> don't do anyhting. + -> the remaining space stays unused since it is too small + } */ +#if MEM_OVERFLOW_CHECK + mem_overflow_init_element(mem, new_size); +#endif + MEM_SANITY(); +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT + mem_free_count = 1; +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + LWIP_MEM_FREE_UNPROTECT(); + return rmem; +} + +/** + * Allocate a block of memory with a minimum of 'size' bytes. + * + * @param size_in is the minimum size of the requested block in bytes. + * @return pointer to allocated memory or NULL if no free memory was found. + * + * Note that the returned value will always be aligned (as defined by MEM_ALIGNMENT). + */ +void * +mem_malloc(mem_size_t size_in) +{ + mem_size_t ptr, ptr2, size; + struct mem *mem, *mem2; +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT + u8_t local_mem_free_count = 0; +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + LWIP_MEM_ALLOC_DECL_PROTECT(); + + if (size_in == 0) { + return NULL; + } + + /* Expand the size of the allocated memory region so that we can + adjust for alignment. */ + size = (mem_size_t)LWIP_MEM_ALIGN_SIZE(size_in); + if (size < MIN_SIZE_ALIGNED) { + /* every data block must be at least MIN_SIZE_ALIGNED long */ + size = MIN_SIZE_ALIGNED; + } +#if MEM_OVERFLOW_CHECK + size += MEM_SANITY_REGION_BEFORE_ALIGNED + MEM_SANITY_REGION_AFTER_ALIGNED; +#endif + if ((size > MEM_SIZE_ALIGNED) || (size < size_in)) { + return NULL; + } + + /* protect the heap from concurrent access */ + sys_mutex_lock(&mem_mutex); + LWIP_MEM_ALLOC_PROTECT(); +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT + /* run as long as a mem_free disturbed mem_malloc or mem_trim */ + do { + local_mem_free_count = 0; +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + + /* Scan through the heap searching for a free block that is big enough, + * beginning with the lowest free block. + */ + for (ptr = mem_to_ptr(lfree); ptr < MEM_SIZE_ALIGNED - size; + ptr = ptr_to_mem(ptr)->next) { + mem = ptr_to_mem(ptr); +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT + mem_free_count = 0; + LWIP_MEM_ALLOC_UNPROTECT(); + /* allow mem_free or mem_trim to run */ + LWIP_MEM_ALLOC_PROTECT(); + if (mem_free_count != 0) { + /* If mem_free or mem_trim have run, we have to restart since they + could have altered our current struct mem. */ + local_mem_free_count = 1; + break; + } +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + + if ((!mem->used) && + (mem->next - (ptr + SIZEOF_STRUCT_MEM)) >= size) { + /* mem is not used and at least perfect fit is possible: + * mem->next - (ptr + SIZEOF_STRUCT_MEM) gives us the 'user data size' of mem */ + + if (mem->next - (ptr + SIZEOF_STRUCT_MEM) >= (size + SIZEOF_STRUCT_MEM + MIN_SIZE_ALIGNED)) { + /* (in addition to the above, we test if another struct mem (SIZEOF_STRUCT_MEM) containing + * at least MIN_SIZE_ALIGNED of data also fits in the 'user data space' of 'mem') + * -> split large block, create empty remainder, + * remainder must be large enough to contain MIN_SIZE_ALIGNED data: if + * mem->next - (ptr + (2*SIZEOF_STRUCT_MEM)) == size, + * struct mem would fit in but no data between mem2 and mem2->next + * @todo we could leave out MIN_SIZE_ALIGNED. We would create an empty + * region that couldn't hold data, but when mem->next gets freed, + * the 2 regions would be combined, resulting in more free memory + */ + ptr2 = (mem_size_t)(ptr + SIZEOF_STRUCT_MEM + size); + LWIP_ASSERT("invalid next ptr",ptr2 != MEM_SIZE_ALIGNED); + /* create mem2 struct */ + mem2 = ptr_to_mem(ptr2); + mem2->used = 0; + mem2->next = mem->next; + mem2->prev = ptr; + /* and insert it between mem and mem->next */ + mem->next = ptr2; + mem->used = 1; + + if (mem2->next != MEM_SIZE_ALIGNED) { + ptr_to_mem(mem2->next)->prev = ptr2; + } + MEM_STATS_INC_USED(used, (size + SIZEOF_STRUCT_MEM)); + } else { + /* (a mem2 struct does no fit into the user data space of mem and mem->next will always + * be used at this point: if not we have 2 unused structs in a row, plug_holes should have + * take care of this). + * -> near fit or exact fit: do not split, no mem2 creation + * also can't move mem->next directly behind mem, since mem->next + * will always be used at this point! + */ + mem->used = 1; + MEM_STATS_INC_USED(used, mem->next - mem_to_ptr(mem)); + } +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT +mem_malloc_adjust_lfree: +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + if (mem == lfree) { + struct mem *cur = lfree; + /* Find next free block after mem and update lowest free pointer */ + while (cur->used && cur != ram_end) { +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT + mem_free_count = 0; + LWIP_MEM_ALLOC_UNPROTECT(); + /* prevent high interrupt latency... */ + LWIP_MEM_ALLOC_PROTECT(); + if (mem_free_count != 0) { + /* If mem_free or mem_trim have run, we have to restart since they + could have altered our current struct mem or lfree. */ + goto mem_malloc_adjust_lfree; + } +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + cur = ptr_to_mem(cur->next); + } + lfree = cur; + LWIP_ASSERT("mem_malloc: !lfree->used", ((lfree == ram_end) || (!lfree->used))); + } + LWIP_MEM_ALLOC_UNPROTECT(); + sys_mutex_unlock(&mem_mutex); + LWIP_ASSERT("mem_malloc: allocated memory not above ram_end.", + (mem_ptr_t)mem + SIZEOF_STRUCT_MEM + size <= (mem_ptr_t)ram_end); + LWIP_ASSERT("mem_malloc: allocated memory properly aligned.", + ((mem_ptr_t)mem + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT == 0); + LWIP_ASSERT("mem_malloc: sanity check alignment", + (((mem_ptr_t)mem) & (MEM_ALIGNMENT - 1)) == 0); + +#if MEM_OVERFLOW_CHECK + mem_overflow_init_element(mem, size_in); +#endif + MEM_SANITY(); + return (u8_t *)mem + SIZEOF_STRUCT_MEM + MEM_SANITY_OFFSET; + } + } +#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT + /* if we got interrupted by a mem_free, try again */ + } while (local_mem_free_count != 0); +#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */ + MEM_STATS_INC(err); + LWIP_MEM_ALLOC_UNPROTECT(); + sys_mutex_unlock(&mem_mutex); + LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("mem_malloc: could not allocate %"S16_F" bytes\n", (s16_t)size)); + return NULL; +} + +#endif /* MEM_USE_POOLS */ + +#if MEM_LIBC_MALLOC && (!LWIP_STATS || !MEM_STATS) +void * +mem_calloc(mem_size_t count, mem_size_t size) +{ + return mem_clib_calloc(count, size); +} + +#else /* MEM_LIBC_MALLOC && (!LWIP_STATS || !MEM_STATS) */ +/** + * Contiguously allocates enough space for count objects that are size bytes + * of memory each and returns a pointer to the allocated memory. + * + * The allocated memory is filled with bytes of value zero. + * + * @param count number of objects to allocate + * @param size size of the objects to allocate + * @return pointer to allocated memory / NULL pointer if there is an error + */ +void * +mem_calloc(mem_size_t count, mem_size_t size) +{ + void *p; + size_t alloc_size = (size_t)count * (size_t)size; + + if ((size_t)(mem_size_t)alloc_size != alloc_size) { + LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("mem_calloc: could not allocate %"SZT_F" bytes\n", alloc_size)); + return NULL; + } + + /* allocate 'count' objects of size 'size' */ + p = mem_malloc((mem_size_t)alloc_size); + if (p) { + /* zero the memory */ + memset(p, 0, alloc_size); + } + return p; +} +#endif /* MEM_LIBC_MALLOC && (!LWIP_STATS || !MEM_STATS) */ diff --git a/lib/lwip/core/memp.c b/lib/lwip/core/memp.c new file mode 100644 index 0000000000..352ce5a551 --- /dev/null +++ b/lib/lwip/core/memp.c @@ -0,0 +1,447 @@ +/** + * @file + * Dynamic pool memory manager + * + * lwIP has dedicated pools for many structures (netconn, protocol control blocks, + * packet buffers, ...). All these pools are managed here. + * + * @defgroup mempool Memory pools + * @ingroup infrastructure + * Custom memory pools + + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#include "lwip/memp.h" +#include "lwip/sys.h" +#include "lwip/stats.h" + +#include <string.h> + +/* Make sure we include everything we need for size calculation required by memp_std.h */ +#include "lwip/pbuf.h" +#include "lwip/raw.h" +#include "lwip/udp.h" +#include "lwip/tcp.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/altcp.h" +#include "lwip/ip4_frag.h" +#include "lwip/netbuf.h" +#include "lwip/api.h" +#include "lwip/priv/tcpip_priv.h" +#include "lwip/priv/api_msg.h" +#include "lwip/priv/sockets_priv.h" +#include "lwip/etharp.h" +#include "lwip/igmp.h" +#include "lwip/timeouts.h" +/* needed by default MEMP_NUM_SYS_TIMEOUT */ +#include "netif/ppp/ppp_opts.h" +#include "lwip/netdb.h" +#include "lwip/dns.h" +#include "lwip/priv/nd6_priv.h" +#include "lwip/ip6_frag.h" +#include "lwip/mld6.h" + +#define LWIP_MEMPOOL(name,num,size,desc) LWIP_MEMPOOL_DECLARE(name,num,size,desc) +#include "lwip/priv/memp_std.h" + +const struct memp_desc *const memp_pools[MEMP_MAX] = { +#define LWIP_MEMPOOL(name,num,size,desc) &memp_ ## name, +#include "lwip/priv/memp_std.h" +}; + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +#if MEMP_MEM_MALLOC && MEMP_OVERFLOW_CHECK >= 2 +#undef MEMP_OVERFLOW_CHECK +/* MEMP_OVERFLOW_CHECK >= 2 does not work with MEMP_MEM_MALLOC, use 1 instead */ +#define MEMP_OVERFLOW_CHECK 1 +#endif + +#if MEMP_SANITY_CHECK && !MEMP_MEM_MALLOC +/** + * Check that memp-lists don't form a circle, using "Floyd's cycle-finding algorithm". + */ +static int +memp_sanity(const struct memp_desc *desc) +{ + struct memp *t, *h; + + t = *desc->tab; + if (t != NULL) { + for (h = t->next; (t != NULL) && (h != NULL); t = t->next, + h = ((h->next != NULL) ? h->next->next : NULL)) { + if (t == h) { + return 0; + } + } + } + + return 1; +} +#endif /* MEMP_SANITY_CHECK && !MEMP_MEM_MALLOC */ + +#if MEMP_OVERFLOW_CHECK +/** + * Check if a memp element was victim of an overflow or underflow + * (e.g. the restricted area after/before it has been altered) + * + * @param p the memp element to check + * @param desc the pool p comes from + */ +static void +memp_overflow_check_element(struct memp *p, const struct memp_desc *desc) +{ + mem_overflow_check_raw((u8_t *)p + MEMP_SIZE, desc->size, "pool ", desc->desc); +} + +/** + * Initialize the restricted area of on memp element. + */ +static void +memp_overflow_init_element(struct memp *p, const struct memp_desc *desc) +{ + mem_overflow_init_raw((u8_t *)p + MEMP_SIZE, desc->size); +} + +#if MEMP_OVERFLOW_CHECK >= 2 +/** + * Do an overflow check for all elements in every pool. + * + * @see memp_overflow_check_element for a description of the check + */ +static void +memp_overflow_check_all(void) +{ + u16_t i, j; + struct memp *p; + SYS_ARCH_DECL_PROTECT(old_level); + SYS_ARCH_PROTECT(old_level); + + for (i = 0; i < MEMP_MAX; ++i) { + p = (struct memp *)LWIP_MEM_ALIGN(memp_pools[i]->base); + for (j = 0; j < memp_pools[i]->num; ++j) { + memp_overflow_check_element(p, memp_pools[i]); + p = LWIP_ALIGNMENT_CAST(struct memp *, ((u8_t *)p + MEMP_SIZE + memp_pools[i]->size + MEM_SANITY_REGION_AFTER_ALIGNED)); + } + } + SYS_ARCH_UNPROTECT(old_level); +} +#endif /* MEMP_OVERFLOW_CHECK >= 2 */ +#endif /* MEMP_OVERFLOW_CHECK */ + +/** + * Initialize custom memory pool. + * Related functions: memp_malloc_pool, memp_free_pool + * + * @param desc pool to initialize + */ +void +memp_init_pool(const struct memp_desc *desc) +{ +#if MEMP_MEM_MALLOC + LWIP_UNUSED_ARG(desc); +#else + int i; + struct memp *memp; + + *desc->tab = NULL; + memp = (struct memp *)LWIP_MEM_ALIGN(desc->base); +#if MEMP_MEM_INIT + /* force memset on pool memory */ + memset(memp, 0, (size_t)desc->num * (MEMP_SIZE + desc->size +#if MEMP_OVERFLOW_CHECK + + MEM_SANITY_REGION_AFTER_ALIGNED +#endif + )); +#endif + /* create a linked list of memp elements */ + for (i = 0; i < desc->num; ++i) { + memp->next = *desc->tab; + *desc->tab = memp; +#if MEMP_OVERFLOW_CHECK + memp_overflow_init_element(memp, desc); +#endif /* MEMP_OVERFLOW_CHECK */ + /* cast through void* to get rid of alignment warnings */ + memp = (struct memp *)(void *)((u8_t *)memp + MEMP_SIZE + desc->size +#if MEMP_OVERFLOW_CHECK + + MEM_SANITY_REGION_AFTER_ALIGNED +#endif + ); + } +#if MEMP_STATS + desc->stats->avail = desc->num; +#endif /* MEMP_STATS */ +#endif /* !MEMP_MEM_MALLOC */ + +#if MEMP_STATS && (defined(LWIP_DEBUG) || LWIP_STATS_DISPLAY) + desc->stats->name = desc->desc; +#endif /* MEMP_STATS && (defined(LWIP_DEBUG) || LWIP_STATS_DISPLAY) */ +} + +/** + * Initializes lwIP built-in pools. + * Related functions: memp_malloc, memp_free + * + * Carves out memp_memory into linked lists for each pool-type. + */ +void +memp_init(void) +{ + u16_t i; + + /* for every pool: */ + for (i = 0; i < LWIP_ARRAYSIZE(memp_pools); i++) { + memp_init_pool(memp_pools[i]); + +#if LWIP_STATS && MEMP_STATS + lwip_stats.memp[i] = memp_pools[i]->stats; +#endif + } + +#if MEMP_OVERFLOW_CHECK >= 2 + /* check everything a first time to see if it worked */ + memp_overflow_check_all(); +#endif /* MEMP_OVERFLOW_CHECK >= 2 */ +} + +static void * +#if !MEMP_OVERFLOW_CHECK +do_memp_malloc_pool(const struct memp_desc *desc) +#else +do_memp_malloc_pool_fn(const struct memp_desc *desc, const char *file, const int line) +#endif +{ + struct memp *memp; + SYS_ARCH_DECL_PROTECT(old_level); + +#if MEMP_MEM_MALLOC + memp = (struct memp *)mem_malloc(MEMP_SIZE + MEMP_ALIGN_SIZE(desc->size)); + SYS_ARCH_PROTECT(old_level); +#else /* MEMP_MEM_MALLOC */ + SYS_ARCH_PROTECT(old_level); + + memp = *desc->tab; +#endif /* MEMP_MEM_MALLOC */ + + if (memp != NULL) { +#if !MEMP_MEM_MALLOC +#if MEMP_OVERFLOW_CHECK == 1 + memp_overflow_check_element(memp, desc); +#endif /* MEMP_OVERFLOW_CHECK */ + + *desc->tab = memp->next; +#if MEMP_OVERFLOW_CHECK + memp->next = NULL; +#endif /* MEMP_OVERFLOW_CHECK */ +#endif /* !MEMP_MEM_MALLOC */ +#if MEMP_OVERFLOW_CHECK + memp->file = file; + memp->line = line; +#if MEMP_MEM_MALLOC + memp_overflow_init_element(memp, desc); +#endif /* MEMP_MEM_MALLOC */ +#endif /* MEMP_OVERFLOW_CHECK */ + LWIP_ASSERT("memp_malloc: memp properly aligned", + ((mem_ptr_t)memp % MEM_ALIGNMENT) == 0); +#if MEMP_STATS + desc->stats->used++; + if (desc->stats->used > desc->stats->max) { + desc->stats->max = desc->stats->used; + } +#endif + SYS_ARCH_UNPROTECT(old_level); + /* cast through u8_t* to get rid of alignment warnings */ + return ((u8_t *)memp + MEMP_SIZE); + } else { +#if MEMP_STATS + desc->stats->err++; +#endif + SYS_ARCH_UNPROTECT(old_level); + LWIP_DEBUGF(MEMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("memp_malloc: out of memory in pool %s\n", desc->desc)); + } + + return NULL; +} + +/** + * Get an element from a custom pool. + * + * @param desc the pool to get an element from + * + * @return a pointer to the allocated memory or a NULL pointer on error + */ +void * +#if !MEMP_OVERFLOW_CHECK +memp_malloc_pool(const struct memp_desc *desc) +#else +memp_malloc_pool_fn(const struct memp_desc *desc, const char *file, const int line) +#endif +{ + LWIP_ASSERT("invalid pool desc", desc != NULL); + if (desc == NULL) { + return NULL; + } + +#if !MEMP_OVERFLOW_CHECK + return do_memp_malloc_pool(desc); +#else + return do_memp_malloc_pool_fn(desc, file, line); +#endif +} + +/** + * Get an element from a specific pool. + * + * @param type the pool to get an element from + * + * @return a pointer to the allocated memory or a NULL pointer on error + */ +void * +#if !MEMP_OVERFLOW_CHECK +memp_malloc(memp_t type) +#else +memp_malloc_fn(memp_t type, const char *file, const int line) +#endif +{ + void *memp; + LWIP_ERROR("memp_malloc: type < MEMP_MAX", (type < MEMP_MAX), return NULL;); + +#if MEMP_OVERFLOW_CHECK >= 2 + memp_overflow_check_all(); +#endif /* MEMP_OVERFLOW_CHECK >= 2 */ + +#if !MEMP_OVERFLOW_CHECK + memp = do_memp_malloc_pool(memp_pools[type]); +#else + memp = do_memp_malloc_pool_fn(memp_pools[type], file, line); +#endif + + return memp; +} + +static void +do_memp_free_pool(const struct memp_desc *desc, void *mem) +{ + struct memp *memp; + SYS_ARCH_DECL_PROTECT(old_level); + + LWIP_ASSERT("memp_free: mem properly aligned", + ((mem_ptr_t)mem % MEM_ALIGNMENT) == 0); + + /* cast through void* to get rid of alignment warnings */ + memp = (struct memp *)(void *)((u8_t *)mem - MEMP_SIZE); + + SYS_ARCH_PROTECT(old_level); + +#if MEMP_OVERFLOW_CHECK == 1 + memp_overflow_check_element(memp, desc); +#endif /* MEMP_OVERFLOW_CHECK */ + +#if MEMP_STATS + desc->stats->used--; +#endif + +#if MEMP_MEM_MALLOC + LWIP_UNUSED_ARG(desc); + SYS_ARCH_UNPROTECT(old_level); + mem_free(memp); +#else /* MEMP_MEM_MALLOC */ + memp->next = *desc->tab; + *desc->tab = memp; + +#if MEMP_SANITY_CHECK + LWIP_ASSERT("memp sanity", memp_sanity(desc)); +#endif /* MEMP_SANITY_CHECK */ + + SYS_ARCH_UNPROTECT(old_level); +#endif /* !MEMP_MEM_MALLOC */ +} + +/** + * Put a custom pool element back into its pool. + * + * @param desc the pool where to put mem + * @param mem the memp element to free + */ +void +memp_free_pool(const struct memp_desc *desc, void *mem) +{ + LWIP_ASSERT("invalid pool desc", desc != NULL); + if ((desc == NULL) || (mem == NULL)) { + return; + } + + do_memp_free_pool(desc, mem); +} + +/** + * Put an element back into its pool. + * + * @param type the pool where to put mem + * @param mem the memp element to free + */ +void +memp_free(memp_t type, void *mem) +{ +#ifdef LWIP_HOOK_MEMP_AVAILABLE + struct memp *old_first; +#endif + + LWIP_ERROR("memp_free: type < MEMP_MAX", (type < MEMP_MAX), return;); + + if (mem == NULL) { + return; + } + +#if MEMP_OVERFLOW_CHECK >= 2 + memp_overflow_check_all(); +#endif /* MEMP_OVERFLOW_CHECK >= 2 */ + +#ifdef LWIP_HOOK_MEMP_AVAILABLE + old_first = *memp_pools[type]->tab; +#endif + + do_memp_free_pool(memp_pools[type], mem); + +#ifdef LWIP_HOOK_MEMP_AVAILABLE + if (old_first == NULL) { + LWIP_HOOK_MEMP_AVAILABLE(type); + } +#endif +} diff --git a/lib/lwip/core/netif.c b/lib/lwip/core/netif.c new file mode 100644 index 0000000000..d3a0677474 --- /dev/null +++ b/lib/lwip/core/netif.c @@ -0,0 +1,1855 @@ +/** + * @file + * lwIP network interface abstraction + * + * @defgroup netif Network interface (NETIF) + * @ingroup callbackstyle_api + * + * @defgroup netif_ip4 IPv4 address handling + * @ingroup netif + * + * @defgroup netif_ip6 IPv6 address handling + * @ingroup netif + * + * @defgroup netif_cd Client data handling + * Store data (void*) on a netif for application usage. + * @see @ref LWIP_NUM_NETIF_CLIENT_DATA + * @ingroup netif + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + */ + +#include "lwip/opt.h" + +#include <string.h> /* memset */ +#include <stdlib.h> /* atoi */ + +#include "lwip/def.h" +#include "lwip/ip_addr.h" +#include "lwip/ip6_addr.h" +#include "lwip/netif.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/udp.h" +#include "lwip/priv/raw_priv.h" +#include "lwip/snmp.h" +#include "lwip/igmp.h" +#include "lwip/etharp.h" +#include "lwip/stats.h" +#include "lwip/sys.h" +#include "lwip/ip.h" +#if ENABLE_LOOPBACK +#if LWIP_NETIF_LOOPBACK_MULTITHREADING +#include "lwip/tcpip.h" +#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */ +#endif /* ENABLE_LOOPBACK */ + +#include "netif/ethernet.h" + +#if LWIP_AUTOIP +#include "lwip/autoip.h" +#endif /* LWIP_AUTOIP */ +#if LWIP_DHCP +#include "lwip/dhcp.h" +#endif /* LWIP_DHCP */ +#if LWIP_ACD +#include "lwip/acd.h" +#endif /* LWIP_ACD */ +#if LWIP_IPV6_DHCP6 +#include "lwip/dhcp6.h" +#endif /* LWIP_IPV6_DHCP6 */ +#if LWIP_IPV6_MLD +#include "lwip/mld6.h" +#endif /* LWIP_IPV6_MLD */ +#if LWIP_IPV6 +#include "lwip/nd6.h" +#endif + +#if LWIP_NETIF_STATUS_CALLBACK +#define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0) +#else +#define NETIF_STATUS_CALLBACK(n) +#endif /* LWIP_NETIF_STATUS_CALLBACK */ + +#if LWIP_NETIF_LINK_CALLBACK +#define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0) +#else +#define NETIF_LINK_CALLBACK(n) +#endif /* LWIP_NETIF_LINK_CALLBACK */ + +#if LWIP_NETIF_EXT_STATUS_CALLBACK +static netif_ext_callback_t *ext_callback; +#endif + +#if !LWIP_SINGLE_NETIF +struct netif *netif_list; +#endif /* !LWIP_SINGLE_NETIF */ +struct netif *netif_default; + +#define netif_index_to_num(index) ((index) - 1) +static u8_t netif_num; + +#if LWIP_NUM_NETIF_CLIENT_DATA > 0 +static u8_t netif_client_id; +#endif + +#define NETIF_REPORT_TYPE_IPV4 0x01 +#define NETIF_REPORT_TYPE_IPV6 0x02 +static void netif_issue_reports(struct netif *netif, u8_t report_type); + +#if LWIP_IPV6 +static err_t netif_null_output_ip6(struct netif *netif, struct pbuf *p, const ip6_addr_t *ipaddr); +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 +static err_t netif_null_output_ip4(struct netif *netif, struct pbuf *p, const ip4_addr_t *ipaddr); +#endif /* LWIP_IPV4 */ + +#if LWIP_HAVE_LOOPIF +#if LWIP_IPV4 +static err_t netif_loop_output_ipv4(struct netif *netif, struct pbuf *p, const ip4_addr_t *addr); +#endif +#if LWIP_IPV6 +static err_t netif_loop_output_ipv6(struct netif *netif, struct pbuf *p, const ip6_addr_t *addr); +#endif + + +static struct netif loop_netif; + +#if LWIP_TESTMODE +struct netif* netif_get_loopif(void) +{ + return &loop_netif; +} +#endif + + +/** + * Initialize a lwip network interface structure for a loopback interface + * + * @param netif the lwip network interface structure for this loopif + * @return ERR_OK if the loopif is initialized + * ERR_MEM if private data couldn't be allocated + */ +static err_t +netif_loopif_init(struct netif *netif) +{ + LWIP_ASSERT("netif_loopif_init: invalid netif", netif != NULL); + + /* initialize the snmp variables and counters inside the struct netif + * ifSpeed: no assumption can be made! + */ + MIB2_INIT_NETIF(netif, snmp_ifType_softwareLoopback, 0); + + netif->name[0] = 'l'; + netif->name[1] = 'o'; +#if LWIP_IPV4 + netif->output = netif_loop_output_ipv4; +#endif +#if LWIP_IPV6 + netif->output_ip6 = netif_loop_output_ipv6; +#endif +#if LWIP_LOOPIF_MULTICAST + netif_set_flags(netif, NETIF_FLAG_IGMP); +#endif + NETIF_SET_CHECKSUM_CTRL(netif, NETIF_CHECKSUM_DISABLE_ALL); + return ERR_OK; +} +#endif /* LWIP_HAVE_LOOPIF */ + +void +netif_init(void) +{ +#if LWIP_HAVE_LOOPIF +#if LWIP_IPV4 +#define LOOPIF_ADDRINIT &loop_ipaddr, &loop_netmask, &loop_gw, + ip4_addr_t loop_ipaddr, loop_netmask, loop_gw; + IP4_ADDR(&loop_gw, 127, 0, 0, 1); + IP4_ADDR(&loop_ipaddr, 127, 0, 0, 1); + IP4_ADDR(&loop_netmask, 255, 0, 0, 0); +#else /* LWIP_IPV4 */ +#define LOOPIF_ADDRINIT +#endif /* LWIP_IPV4 */ + +#if NO_SYS + netif_add(&loop_netif, LOOPIF_ADDRINIT NULL, netif_loopif_init, ip_input); +#else /* NO_SYS */ + netif_add(&loop_netif, LOOPIF_ADDRINIT NULL, netif_loopif_init, tcpip_input); +#endif /* NO_SYS */ + +#if LWIP_IPV6 + IP_ADDR6_HOST(loop_netif.ip6_addr, 0, 0, 0, 0x00000001UL); + loop_netif.ip6_addr_state[0] = IP6_ADDR_VALID; +#endif /* LWIP_IPV6 */ + + netif_set_link_up(&loop_netif); + netif_set_up(&loop_netif); + +#endif /* LWIP_HAVE_LOOPIF */ +} + +/** + * @ingroup lwip_nosys + * Forwards a received packet for input processing with + * ethernet_input() or ip_input() depending on netif flags. + * Don't call directly, pass to netif_add() and call + * netif->input(). + * Only works if the netif driver correctly sets + * NETIF_FLAG_ETHARP and/or NETIF_FLAG_ETHERNET flag! + */ +err_t +netif_input(struct pbuf *p, struct netif *inp) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ASSERT("netif_input: invalid pbuf", p != NULL); + LWIP_ASSERT("netif_input: invalid netif", inp != NULL); + +#if LWIP_ETHERNET + if (inp->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) { + return ethernet_input(p, inp); + } else +#endif /* LWIP_ETHERNET */ + return ip_input(p, inp); +} + +/** + * @ingroup netif + * Add a network interface to the list of lwIP netifs. + * + * Same as @ref netif_add but without IPv4 addresses + */ +struct netif * +netif_add_noaddr(struct netif *netif, void *state, netif_init_fn init, netif_input_fn input) +{ + return netif_add(netif, +#if LWIP_IPV4 + NULL, NULL, NULL, +#endif /* LWIP_IPV4*/ + state, init, input); +} + +/** + * @ingroup netif + * Add a network interface to the list of lwIP netifs. + * + * @param netif a pre-allocated netif structure + * @param ipaddr IP address for the new netif + * @param netmask network mask for the new netif + * @param gw default gateway IP address for the new netif + * @param state opaque data passed to the new netif + * @param init callback function that initializes the interface + * @param input callback function that is called to pass + * ingress packets up in the protocol layer stack.<br> + * It is recommended to use a function that passes the input directly + * to the stack (netif_input(), NO_SYS=1 mode) or via sending a + * message to TCPIP thread (tcpip_input(), NO_SYS=0 mode).<br> + * These functions use netif flags NETIF_FLAG_ETHARP and NETIF_FLAG_ETHERNET + * to decide whether to forward to ethernet_input() or ip_input(). + * In other words, the functions only work when the netif + * driver is implemented correctly!<br> + * Most members of struct netif should be be initialized by the + * netif init function = netif driver (init parameter of this function).<br> + * IPv6: Don't forget to call netif_create_ip6_linklocal_address() after + * setting the MAC address in struct netif.hwaddr + * (IPv6 requires a link-local address). + * + * @return netif, or NULL if failed. + */ +struct netif * +netif_add(struct netif *netif, +#if LWIP_IPV4 + const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw, +#endif /* LWIP_IPV4 */ + void *state, netif_init_fn init, netif_input_fn input) +{ +#if LWIP_IPV6 + s8_t i; +#endif + + LWIP_ASSERT_CORE_LOCKED(); + +#if LWIP_SINGLE_NETIF + if (netif_default != NULL) { + LWIP_ASSERT("single netif already set", 0); + return NULL; + } +#endif + + LWIP_ERROR("netif_add: invalid netif", netif != NULL, return NULL); + LWIP_ERROR("netif_add: No init function given", init != NULL, return NULL); + +#if LWIP_IPV4 + if (ipaddr == NULL) { + ipaddr = ip_2_ip4(IP4_ADDR_ANY); + } + if (netmask == NULL) { + netmask = ip_2_ip4(IP4_ADDR_ANY); + } + if (gw == NULL) { + gw = ip_2_ip4(IP4_ADDR_ANY); + } + + /* reset new interface configuration state */ + ip_addr_set_zero_ip4(&netif->ip_addr); + ip_addr_set_zero_ip4(&netif->netmask); + ip_addr_set_zero_ip4(&netif->gw); + netif->output = netif_null_output_ip4; +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + ip_addr_set_zero_ip6(&netif->ip6_addr[i]); + netif->ip6_addr_state[i] = IP6_ADDR_INVALID; +#if LWIP_IPV6_ADDRESS_LIFETIMES + netif->ip6_addr_valid_life[i] = IP6_ADDR_LIFE_STATIC; + netif->ip6_addr_pref_life[i] = IP6_ADDR_LIFE_STATIC; +#endif /* LWIP_IPV6_ADDRESS_LIFETIMES */ + } + netif->output_ip6 = netif_null_output_ip6; +#endif /* LWIP_IPV6 */ + NETIF_SET_CHECKSUM_CTRL(netif, NETIF_CHECKSUM_ENABLE_ALL); + netif->mtu = 0; + netif->flags = 0; +#ifdef netif_get_client_data + memset(netif->client_data, 0, sizeof(netif->client_data)); +#endif /* LWIP_NUM_NETIF_CLIENT_DATA */ +#if LWIP_IPV6 +#if LWIP_IPV6_AUTOCONFIG + /* IPv6 address autoconfiguration should be enabled by default */ + netif->ip6_autoconfig_enabled = 1; +#endif /* LWIP_IPV6_AUTOCONFIG */ + nd6_restart_netif(netif); +#endif /* LWIP_IPV6 */ +#if LWIP_NETIF_STATUS_CALLBACK + netif->status_callback = NULL; +#endif /* LWIP_NETIF_STATUS_CALLBACK */ +#if LWIP_NETIF_LINK_CALLBACK + netif->link_callback = NULL; +#endif /* LWIP_NETIF_LINK_CALLBACK */ +#if LWIP_IGMP + netif->igmp_mac_filter = NULL; +#endif /* LWIP_IGMP */ +#if LWIP_IPV6 && LWIP_IPV6_MLD + netif->mld_mac_filter = NULL; +#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ + + /* remember netif specific state information data */ + netif->state = state; + netif->num = netif_num; + netif->input = input; + +#if LWIP_ACD + netif->acd_list = NULL; +#endif /* LWIP_ACD */ + NETIF_RESET_HINTS(netif); +#if ENABLE_LOOPBACK + netif->loop_first = NULL; + netif->loop_last = NULL; +#if LWIP_LOOPBACK_MAX_PBUFS + netif->loop_cnt_current = 0; +#endif /* LWIP_LOOPBACK_MAX_PBUFS */ +#if LWIP_NETIF_LOOPBACK_MULTITHREADING + netif->reschedule_poll = 0; +#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */ +#endif /* ENABLE_LOOPBACK */ + +#if LWIP_IPV4 + netif_set_addr(netif, ipaddr, netmask, gw); +#endif /* LWIP_IPV4 */ + + /* call user specified initialization function for netif */ + if (init(netif) != ERR_OK) { + return NULL; + } +#if LWIP_IPV6 && LWIP_ND6_ALLOW_RA_UPDATES + /* Initialize the MTU for IPv6 to the one set by the netif driver. + This can be updated later by RA. */ + netif->mtu6 = netif->mtu; +#endif /* LWIP_IPV6 && LWIP_ND6_ALLOW_RA_UPDATES */ + +#if !LWIP_SINGLE_NETIF + /* Assign a unique netif number in the range [0..254], so that (num+1) can + serve as an interface index that fits in a u8_t. + We assume that the new netif has not yet been added to the list here. + This algorithm is O(n^2), but that should be OK for lwIP. + */ + { + struct netif *netif2; + int num_netifs; + do { + if (netif->num == 255) { + netif->num = 0; + } + num_netifs = 0; + for (netif2 = netif_list; netif2 != NULL; netif2 = netif2->next) { + LWIP_ASSERT("netif already added", netif2 != netif); + num_netifs++; + LWIP_ASSERT("too many netifs, max. supported number is 255", num_netifs <= 255); + if (netif2->num == netif->num) { + netif->num++; + break; + } + } + } while (netif2 != NULL); + } + if (netif->num == 254) { + netif_num = 0; + } else { + netif_num = (u8_t)(netif->num + 1); + } + + /* add this netif to the list */ + netif->next = netif_list; + netif_list = netif; +#endif /* "LWIP_SINGLE_NETIF */ + mib2_netif_added(netif); + +#if LWIP_IGMP + /* start IGMP processing */ + if (netif->flags & NETIF_FLAG_IGMP) { + igmp_start(netif); + } +#endif /* LWIP_IGMP */ + + LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP", + netif->name[0], netif->name[1])); +#if LWIP_IPV4 + LWIP_DEBUGF(NETIF_DEBUG, (" addr ")); + ip4_addr_debug_print(NETIF_DEBUG, ipaddr); + LWIP_DEBUGF(NETIF_DEBUG, (" netmask ")); + ip4_addr_debug_print(NETIF_DEBUG, netmask); + LWIP_DEBUGF(NETIF_DEBUG, (" gw ")); + ip4_addr_debug_print(NETIF_DEBUG, gw); +#endif /* LWIP_IPV4 */ + LWIP_DEBUGF(NETIF_DEBUG, ("\n")); + + netif_invoke_ext_callback(netif, LWIP_NSC_NETIF_ADDED, NULL); + + return netif; +} + +static void +netif_do_ip_addr_changed(const ip_addr_t *old_addr, const ip_addr_t *new_addr) +{ +#if LWIP_TCP + tcp_netif_ip_addr_changed(old_addr, new_addr); +#endif /* LWIP_TCP */ +#if LWIP_UDP + udp_netif_ip_addr_changed(old_addr, new_addr); +#endif /* LWIP_UDP */ +#if LWIP_RAW + raw_netif_ip_addr_changed(old_addr, new_addr); +#endif /* LWIP_RAW */ +} + +#if LWIP_IPV4 +static int +netif_do_set_ipaddr(struct netif *netif, const ip4_addr_t *ipaddr, ip_addr_t *old_addr) +{ + LWIP_ASSERT("invalid pointer", ipaddr != NULL); + LWIP_ASSERT("invalid pointer", old_addr != NULL); + + /* address is actually being changed? */ + if (ip4_addr_eq(ipaddr, netif_ip4_addr(netif)) == 0) { + ip_addr_t new_addr; + *ip_2_ip4(&new_addr) = *ipaddr; + IP_SET_TYPE_VAL(new_addr, IPADDR_TYPE_V4); + + ip_addr_copy(*old_addr, *netif_ip_addr4(netif)); + + LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n")); + netif_do_ip_addr_changed(old_addr, &new_addr); + +#if LWIP_ACD + acd_netif_ip_addr_changed(netif, old_addr, &new_addr); +#endif /* LWIP_ACD */ + + mib2_remove_ip4(netif); + mib2_remove_route_ip4(0, netif); + /* set new IP address to netif */ + ip4_addr_set(ip_2_ip4(&netif->ip_addr), ipaddr); + IP_SET_TYPE_VAL(netif->ip_addr, IPADDR_TYPE_V4); + mib2_add_ip4(netif); + mib2_add_route_ip4(0, netif); + + netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV4); + + NETIF_STATUS_CALLBACK(netif); + return 1; /* address changed */ + } + return 0; /* address unchanged */ +} + +/** + * @ingroup netif_ip4 + * Change the IP address of a network interface + * + * @param netif the network interface to change + * @param ipaddr the new IP address + * + * @note call netif_set_addr() if you also want to change netmask and + * default gateway + */ +void +netif_set_ipaddr(struct netif *netif, const ip4_addr_t *ipaddr) +{ + ip_addr_t old_addr; + + LWIP_ERROR("netif_set_ipaddr: invalid netif", netif != NULL, return); + + /* Don't propagate NULL pointer (IPv4 ANY) to subsequent functions */ + if (ipaddr == NULL) { + ipaddr = IP4_ADDR_ANY4; + } + + LWIP_ASSERT_CORE_LOCKED(); + + if (netif_do_set_ipaddr(netif, ipaddr, &old_addr)) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + netif_ext_callback_args_t args; + args.ipv4_changed.old_address = &old_addr; + netif_invoke_ext_callback(netif, LWIP_NSC_IPV4_ADDRESS_CHANGED, &args); +#endif + } +} + +static int +netif_do_set_netmask(struct netif *netif, const ip4_addr_t *netmask, ip_addr_t *old_nm) +{ + /* address is actually being changed? */ + if (ip4_addr_eq(netmask, netif_ip4_netmask(netif)) == 0) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + LWIP_ASSERT("invalid pointer", old_nm != NULL); + ip_addr_copy(*old_nm, *netif_ip_netmask4(netif)); +#else + LWIP_UNUSED_ARG(old_nm); +#endif + mib2_remove_route_ip4(0, netif); + /* set new netmask to netif */ + ip4_addr_set(ip_2_ip4(&netif->netmask), netmask); + IP_SET_TYPE_VAL(netif->netmask, IPADDR_TYPE_V4); + mib2_add_route_ip4(0, netif); + LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: netmask of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + netif->name[0], netif->name[1], + ip4_addr1_16(netif_ip4_netmask(netif)), + ip4_addr2_16(netif_ip4_netmask(netif)), + ip4_addr3_16(netif_ip4_netmask(netif)), + ip4_addr4_16(netif_ip4_netmask(netif)))); + return 1; /* netmask changed */ + } + return 0; /* netmask unchanged */ +} + +/** + * @ingroup netif_ip4 + * Change the netmask of a network interface + * + * @param netif the network interface to change + * @param netmask the new netmask + * + * @note call netif_set_addr() if you also want to change ip address and + * default gateway + */ +void +netif_set_netmask(struct netif *netif, const ip4_addr_t *netmask) +{ +#if LWIP_NETIF_EXT_STATUS_CALLBACK + ip_addr_t old_nm_val; + ip_addr_t *old_nm = &old_nm_val; +#else + ip_addr_t *old_nm = NULL; +#endif + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("netif_set_netmask: invalid netif", netif != NULL, return); + + /* Don't propagate NULL pointer (IPv4 ANY) to subsequent functions */ + if (netmask == NULL) { + netmask = IP4_ADDR_ANY4; + } + + if (netif_do_set_netmask(netif, netmask, old_nm)) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + netif_ext_callback_args_t args; + args.ipv4_changed.old_netmask = old_nm; + netif_invoke_ext_callback(netif, LWIP_NSC_IPV4_NETMASK_CHANGED, &args); +#endif + } +} + +static int +netif_do_set_gw(struct netif *netif, const ip4_addr_t *gw, ip_addr_t *old_gw) +{ + /* address is actually being changed? */ + if (ip4_addr_eq(gw, netif_ip4_gw(netif)) == 0) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + LWIP_ASSERT("invalid pointer", old_gw != NULL); + ip_addr_copy(*old_gw, *netif_ip_gw4(netif)); +#else + LWIP_UNUSED_ARG(old_gw); +#endif + + ip4_addr_set(ip_2_ip4(&netif->gw), gw); + IP_SET_TYPE_VAL(netif->gw, IPADDR_TYPE_V4); + LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: GW address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", + netif->name[0], netif->name[1], + ip4_addr1_16(netif_ip4_gw(netif)), + ip4_addr2_16(netif_ip4_gw(netif)), + ip4_addr3_16(netif_ip4_gw(netif)), + ip4_addr4_16(netif_ip4_gw(netif)))); + return 1; /* gateway changed */ + } + return 0; /* gateway unchanged */ +} + +/** + * @ingroup netif_ip4 + * Change the default gateway for a network interface + * + * @param netif the network interface to change + * @param gw the new default gateway + * + * @note call netif_set_addr() if you also want to change ip address and netmask + */ +void +netif_set_gw(struct netif *netif, const ip4_addr_t *gw) +{ +#if LWIP_NETIF_EXT_STATUS_CALLBACK + ip_addr_t old_gw_val; + ip_addr_t *old_gw = &old_gw_val; +#else + ip_addr_t *old_gw = NULL; +#endif + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("netif_set_gw: invalid netif", netif != NULL, return); + + /* Don't propagate NULL pointer (IPv4 ANY) to subsequent functions */ + if (gw == NULL) { + gw = IP4_ADDR_ANY4; + } + + if (netif_do_set_gw(netif, gw, old_gw)) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + netif_ext_callback_args_t args; + args.ipv4_changed.old_gw = old_gw; + netif_invoke_ext_callback(netif, LWIP_NSC_IPV4_GATEWAY_CHANGED, &args); +#endif + } +} + +/** + * @ingroup netif_ip4 + * Change IP address configuration for a network interface (including netmask + * and default gateway). + * + * @param netif the network interface to change + * @param ipaddr the new IP address + * @param netmask the new netmask + * @param gw the new default gateway + */ +void +netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, + const ip4_addr_t *gw) +{ +#if LWIP_NETIF_EXT_STATUS_CALLBACK + netif_nsc_reason_t change_reason = LWIP_NSC_NONE; + netif_ext_callback_args_t cb_args; + ip_addr_t old_nm_val; + ip_addr_t old_gw_val; + ip_addr_t *old_nm = &old_nm_val; + ip_addr_t *old_gw = &old_gw_val; +#else + ip_addr_t *old_nm = NULL; + ip_addr_t *old_gw = NULL; +#endif + ip_addr_t old_addr; + int remove; + + LWIP_ASSERT_CORE_LOCKED(); + + /* Don't propagate NULL pointer (IPv4 ANY) to subsequent functions */ + if (ipaddr == NULL) { + ipaddr = IP4_ADDR_ANY4; + } + if (netmask == NULL) { + netmask = IP4_ADDR_ANY4; + } + if (gw == NULL) { + gw = IP4_ADDR_ANY4; + } + + remove = ip4_addr_isany(ipaddr); + if (remove) { + /* when removing an address, we have to remove it *before* changing netmask/gw + to ensure that tcp RST segment can be sent correctly */ + if (netif_do_set_ipaddr(netif, ipaddr, &old_addr)) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + change_reason |= LWIP_NSC_IPV4_ADDRESS_CHANGED; + cb_args.ipv4_changed.old_address = &old_addr; +#endif + } + } + if (netif_do_set_netmask(netif, netmask, old_nm)) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + change_reason |= LWIP_NSC_IPV4_NETMASK_CHANGED; + cb_args.ipv4_changed.old_netmask = old_nm; +#endif + } + if (netif_do_set_gw(netif, gw, old_gw)) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + change_reason |= LWIP_NSC_IPV4_GATEWAY_CHANGED; + cb_args.ipv4_changed.old_gw = old_gw; +#endif + } + if (!remove) { + /* set ipaddr last to ensure netmask/gw have been set when status callback is called */ + if (netif_do_set_ipaddr(netif, ipaddr, &old_addr)) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + change_reason |= LWIP_NSC_IPV4_ADDRESS_CHANGED; + cb_args.ipv4_changed.old_address = &old_addr; +#endif + } + } + +#if LWIP_NETIF_EXT_STATUS_CALLBACK + if (change_reason != LWIP_NSC_NONE) { + change_reason |= LWIP_NSC_IPV4_SETTINGS_CHANGED; + } + if (!remove) { + /* Issue a callback even if the address hasn't changed, eg. DHCP reboot */ + change_reason |= LWIP_NSC_IPV4_ADDR_VALID; + } + if (change_reason != LWIP_NSC_NONE) { + netif_invoke_ext_callback(netif, change_reason, &cb_args); + } +#endif +} +#endif /* LWIP_IPV4*/ + +/** + * @ingroup netif + * Remove a network interface from the list of lwIP netifs. + * + * @param netif the network interface to remove + */ +void +netif_remove(struct netif *netif) +{ +#if LWIP_IPV6 + int i; +#endif + + LWIP_ASSERT_CORE_LOCKED(); + + if (netif == NULL) { + return; + } + + netif_invoke_ext_callback(netif, LWIP_NSC_NETIF_REMOVED, NULL); + +#if LWIP_IPV4 + if (!ip4_addr_isany_val(*netif_ip4_addr(netif))) { + netif_do_ip_addr_changed(netif_ip_addr4(netif), NULL); + } + +#if LWIP_IGMP + /* stop IGMP processing */ + if (netif->flags & NETIF_FLAG_IGMP) { + igmp_stop(netif); + } +#endif /* LWIP_IGMP */ +#endif /* LWIP_IPV4*/ + +#if LWIP_IPV6 + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i))) { + netif_do_ip_addr_changed(netif_ip_addr6(netif, i), NULL); + } + } +#if LWIP_IPV6_MLD + /* stop MLD processing */ + mld6_stop(netif); +#endif /* LWIP_IPV6_MLD */ +#endif /* LWIP_IPV6 */ + if (netif_is_up(netif)) { + /* set netif down before removing (call callback function) */ + netif_set_down(netif); + } + + mib2_remove_ip4(netif); + + /* this netif is default? */ + if (netif_default == netif) { + /* reset default netif */ + netif_set_default(NULL); + } +#if !LWIP_SINGLE_NETIF + /* is it the first netif? */ + if (netif_list == netif) { + netif_list = netif->next; + } else { + /* look for netif further down the list */ + struct netif *tmp_netif; + NETIF_FOREACH(tmp_netif) { + if (tmp_netif->next == netif) { + tmp_netif->next = netif->next; + break; + } + } + if (tmp_netif == NULL) { + return; /* netif is not on the list */ + } + } +#endif /* !LWIP_SINGLE_NETIF */ + mib2_netif_removed(netif); +#if LWIP_NETIF_REMOVE_CALLBACK + if (netif->remove_callback) { + netif->remove_callback(netif); + } +#endif /* LWIP_NETIF_REMOVE_CALLBACK */ + LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") ); +} + +/** + * @ingroup netif + * Set a network interface as the default network interface + * (used to output all packets for which no specific route is found) + * + * @param netif the default network interface + */ +void +netif_set_default(struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + + if (netif == NULL) { + /* remove default route */ + mib2_remove_route_ip4(1, netif); + } else { + /* install default route */ + mib2_add_route_ip4(1, netif); + } + netif_default = netif; + LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n", + netif ? netif->name[0] : ''', netif ? netif->name[1] : ''')); +} + +/** + * @ingroup netif + * Bring an interface up, available for processing + * traffic. + */ +void +netif_set_up(struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("netif_set_up: invalid netif", netif != NULL, return); + + if (!(netif->flags & NETIF_FLAG_UP)) { + netif_set_flags(netif, NETIF_FLAG_UP); + + MIB2_COPY_SYSUPTIME_TO(&netif->ts); + + NETIF_STATUS_CALLBACK(netif); + +#if LWIP_NETIF_EXT_STATUS_CALLBACK + { + netif_ext_callback_args_t args; + args.status_changed.state = 1; + netif_invoke_ext_callback(netif, LWIP_NSC_STATUS_CHANGED, &args); + } +#endif + + netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV4 | NETIF_REPORT_TYPE_IPV6); +#if LWIP_IPV6 + nd6_restart_netif(netif); +#endif /* LWIP_IPV6 */ + } +} + +/** Send ARP/IGMP/MLD/RS events, e.g. on link-up/netif-up or addr-change + */ +static void +netif_issue_reports(struct netif *netif, u8_t report_type) +{ + LWIP_ASSERT("netif_issue_reports: invalid netif", netif != NULL); + + /* Only send reports when both link and admin states are up */ + if (!(netif->flags & NETIF_FLAG_LINK_UP) || + !(netif->flags & NETIF_FLAG_UP)) { + return; + } + +#if LWIP_IPV4 + if ((report_type & NETIF_REPORT_TYPE_IPV4) && + !ip4_addr_isany_val(*netif_ip4_addr(netif))) { +#if LWIP_ARP && !LWIP_ACD + /* For Ethernet network interfaces: + * we would like to send a "gratuitous ARP". + * Only needs to be done here if ACD isn't configured. + */ + if (netif->flags & (NETIF_FLAG_ETHARP)) { + etharp_gratuitous(netif); + } +#endif /* LWIP_ARP */ + +#if LWIP_IGMP + /* resend IGMP memberships */ + if (netif->flags & NETIF_FLAG_IGMP) { + igmp_report_groups(netif); + } +#endif /* LWIP_IGMP */ + } +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 + if (report_type & NETIF_REPORT_TYPE_IPV6) { +#if LWIP_IPV6_MLD + /* send mld memberships */ + mld6_report_groups(netif); +#endif /* LWIP_IPV6_MLD */ + } +#endif /* LWIP_IPV6 */ +} + +/** + * @ingroup netif + * Bring an interface down, disabling any traffic processing. + */ +void +netif_set_down(struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("netif_set_down: invalid netif", netif != NULL, return); + + if (netif->flags & NETIF_FLAG_UP) { +#if LWIP_NETIF_EXT_STATUS_CALLBACK + { + netif_ext_callback_args_t args; + args.status_changed.state = 0; + netif_invoke_ext_callback(netif, LWIP_NSC_STATUS_CHANGED, &args); + } +#endif + + netif_clear_flags(netif, NETIF_FLAG_UP); + MIB2_COPY_SYSUPTIME_TO(&netif->ts); + +#if LWIP_IPV4 && LWIP_ARP + if (netif->flags & NETIF_FLAG_ETHARP) { + etharp_cleanup_netif(netif); + } +#endif /* LWIP_IPV4 && LWIP_ARP */ + +#if LWIP_IPV6 + nd6_cleanup_netif(netif); +#endif /* LWIP_IPV6 */ + + NETIF_STATUS_CALLBACK(netif); + } +} + +#if LWIP_NETIF_STATUS_CALLBACK +/** + * @ingroup netif + * Set callback to be called when interface is brought up/down or address is changed while up + */ +void +netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback) +{ + LWIP_ASSERT_CORE_LOCKED(); + + if (netif) { + netif->status_callback = status_callback; + } +} +#endif /* LWIP_NETIF_STATUS_CALLBACK */ + +#if LWIP_NETIF_REMOVE_CALLBACK +/** + * @ingroup netif + * Set callback to be called when the interface has been removed + */ +void +netif_set_remove_callback(struct netif *netif, netif_status_callback_fn remove_callback) +{ + LWIP_ASSERT_CORE_LOCKED(); + + if (netif) { + netif->remove_callback = remove_callback; + } +} +#endif /* LWIP_NETIF_REMOVE_CALLBACK */ + +/** + * @ingroup netif + * Called by a driver when its link goes up + */ +void +netif_set_link_up(struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("netif_set_link_up: invalid netif", netif != NULL, return); + + if (!(netif->flags & NETIF_FLAG_LINK_UP)) { + netif_set_flags(netif, NETIF_FLAG_LINK_UP); + +#if LWIP_DHCP + dhcp_network_changed_link_up(netif); +#endif /* LWIP_DHCP */ + +#if LWIP_AUTOIP + autoip_network_changed_link_up(netif); +#endif /* LWIP_AUTOIP */ + + netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV4 | NETIF_REPORT_TYPE_IPV6); +#if LWIP_IPV6 + nd6_restart_netif(netif); +#endif /* LWIP_IPV6 */ + + NETIF_LINK_CALLBACK(netif); +#if LWIP_NETIF_EXT_STATUS_CALLBACK + { + netif_ext_callback_args_t args; + args.link_changed.state = 1; + netif_invoke_ext_callback(netif, LWIP_NSC_LINK_CHANGED, &args); + } +#endif + } +} + +/** + * @ingroup netif + * Called by a driver when its link goes down + */ +void +netif_set_link_down(struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("netif_set_link_down: invalid netif", netif != NULL, return); + + if (netif->flags & NETIF_FLAG_LINK_UP) { + netif_clear_flags(netif, NETIF_FLAG_LINK_UP); + +#if LWIP_AUTOIP + autoip_network_changed_link_down(netif); +#endif /* LWIP_AUTOIP */ + +#if LWIP_ACD + acd_network_changed_link_down(netif); +#endif /* LWIP_ACD */ + +#if LWIP_IPV6 && LWIP_ND6_ALLOW_RA_UPDATES + netif->mtu6 = netif->mtu; +#endif + + NETIF_LINK_CALLBACK(netif); +#if LWIP_NETIF_EXT_STATUS_CALLBACK + { + netif_ext_callback_args_t args; + args.link_changed.state = 0; + netif_invoke_ext_callback(netif, LWIP_NSC_LINK_CHANGED, &args); + } +#endif + } +} + +#if LWIP_NETIF_LINK_CALLBACK +/** + * @ingroup netif + * Set callback to be called when link is brought up/down + */ +void +netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback) +{ + LWIP_ASSERT_CORE_LOCKED(); + + if (netif) { + netif->link_callback = link_callback; + } +} +#endif /* LWIP_NETIF_LINK_CALLBACK */ + +#if ENABLE_LOOPBACK +/** + * @ingroup netif + * Send an IP packet to be received on the same netif (loopif-like). + * The pbuf is copied and added to an internal queue which is fed to + * netif->input by netif_poll(). + * In multithreaded mode, the call to netif_poll() is queued to be done on the + * TCP/IP thread. + * In callback mode, the user has the responsibility to call netif_poll() in + * the main loop of their application. + * + * @param netif the lwip network interface structure + * @param p the (IP) packet to 'send' + * @return ERR_OK if the packet has been sent + * ERR_MEM if the pbuf used to copy the packet couldn't be allocated + */ +err_t +netif_loop_output(struct netif *netif, struct pbuf *p) +{ + struct pbuf *r; + err_t err; + struct pbuf *last; +#if LWIP_LOOPBACK_MAX_PBUFS + u16_t clen = 0; +#endif /* LWIP_LOOPBACK_MAX_PBUFS */ + /* If we have a loopif, SNMP counters are adjusted for it, + * if not they are adjusted for 'netif'. */ +#if MIB2_STATS +#if LWIP_HAVE_LOOPIF + struct netif *stats_if = &loop_netif; +#else /* LWIP_HAVE_LOOPIF */ + struct netif *stats_if = netif; +#endif /* LWIP_HAVE_LOOPIF */ +#endif /* MIB2_STATS */ +#if LWIP_NETIF_LOOPBACK_MULTITHREADING + u8_t schedule_poll = 0; +#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */ + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_ASSERT("netif_loop_output: invalid netif", netif != NULL); + LWIP_ASSERT("netif_loop_output: invalid pbuf", p != NULL); + + /* Allocate a new pbuf */ + r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM); + if (r == NULL) { + LINK_STATS_INC(link.memerr); + LINK_STATS_INC(link.drop); + MIB2_STATS_NETIF_INC(stats_if, ifoutdiscards); + return ERR_MEM; + } +#if LWIP_LOOPBACK_MAX_PBUFS + clen = pbuf_clen(r); + /* check for overflow or too many pbuf on queue */ + if (((netif->loop_cnt_current + clen) < netif->loop_cnt_current) || + ((netif->loop_cnt_current + clen) > LWIP_MIN(LWIP_LOOPBACK_MAX_PBUFS, 0xFFFF))) { + pbuf_free(r); + LINK_STATS_INC(link.memerr); + LINK_STATS_INC(link.drop); + MIB2_STATS_NETIF_INC(stats_if, ifoutdiscards); + return ERR_MEM; + } + netif->loop_cnt_current = (u16_t)(netif->loop_cnt_current + clen); +#endif /* LWIP_LOOPBACK_MAX_PBUFS */ + + /* Copy the whole pbuf queue p into the single pbuf r */ + if ((err = pbuf_copy(r, p)) != ERR_OK) { + pbuf_free(r); + LINK_STATS_INC(link.memerr); + LINK_STATS_INC(link.drop); + MIB2_STATS_NETIF_INC(stats_if, ifoutdiscards); + return err; + } + + /* Put the packet on a linked list which gets emptied through calling + netif_poll(). */ + + /* let last point to the last pbuf in chain r */ + for (last = r; last->next != NULL; last = last->next) { + /* nothing to do here, just get to the last pbuf */ + } + + SYS_ARCH_PROTECT(lev); + if (netif->loop_first != NULL) { + LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL); + netif->loop_last->next = r; + netif->loop_last = last; +#if LWIP_NETIF_LOOPBACK_MULTITHREADING + if (netif->reschedule_poll) { + schedule_poll = 1; + netif->reschedule_poll = 0; + } +#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */ + } else { + netif->loop_first = r; + netif->loop_last = last; +#if LWIP_NETIF_LOOPBACK_MULTITHREADING + /* No existing packets queued, schedule poll */ + schedule_poll = 1; +#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */ + } + SYS_ARCH_UNPROTECT(lev); + + LINK_STATS_INC(link.xmit); + MIB2_STATS_NETIF_ADD(stats_if, ifoutoctets, p->tot_len); + MIB2_STATS_NETIF_INC(stats_if, ifoutucastpkts); + +#if LWIP_NETIF_LOOPBACK_MULTITHREADING + /* For multithreading environment, schedule a call to netif_poll */ + if (schedule_poll) { + if (tcpip_try_callback((tcpip_callback_fn)netif_poll, netif) != ERR_OK) { + SYS_ARCH_PROTECT(lev); + netif->reschedule_poll = 1; + SYS_ARCH_UNPROTECT(lev); + } + } +#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */ + + return ERR_OK; +} + +#if LWIP_HAVE_LOOPIF +#if LWIP_IPV4 +static err_t +netif_loop_output_ipv4(struct netif *netif, struct pbuf *p, const ip4_addr_t *addr) +{ + LWIP_UNUSED_ARG(addr); + return netif_loop_output(netif, p); +} +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +static err_t +netif_loop_output_ipv6(struct netif *netif, struct pbuf *p, const ip6_addr_t *addr) +{ + LWIP_UNUSED_ARG(addr); + return netif_loop_output(netif, p); +} +#endif /* LWIP_IPV6 */ +#endif /* LWIP_HAVE_LOOPIF */ + + +/** + * Call netif_poll() in the main loop of your application. This is to prevent + * reentering non-reentrant functions like tcp_input(). Packets passed to + * netif_loop_output() are put on a list that is passed to netif->input() by + * netif_poll(). + */ +void +netif_poll(struct netif *netif) +{ + /* If we have a loopif, SNMP counters are adjusted for it, + * if not they are adjusted for 'netif'. */ +#if MIB2_STATS +#if LWIP_HAVE_LOOPIF + struct netif *stats_if = &loop_netif; +#else /* LWIP_HAVE_LOOPIF */ + struct netif *stats_if = netif; +#endif /* LWIP_HAVE_LOOPIF */ +#endif /* MIB2_STATS */ + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_ASSERT("netif_poll: invalid netif", netif != NULL); + + /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */ + SYS_ARCH_PROTECT(lev); + while (netif->loop_first != NULL) { + struct pbuf *in, *in_end; +#if LWIP_LOOPBACK_MAX_PBUFS + u8_t clen = 1; +#endif /* LWIP_LOOPBACK_MAX_PBUFS */ + + in = in_end = netif->loop_first; + while (in_end->len != in_end->tot_len) { + LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL); + in_end = in_end->next; +#if LWIP_LOOPBACK_MAX_PBUFS + clen++; +#endif /* LWIP_LOOPBACK_MAX_PBUFS */ + } +#if LWIP_LOOPBACK_MAX_PBUFS + /* adjust the number of pbufs on queue */ + LWIP_ASSERT("netif->loop_cnt_current underflow", + ((netif->loop_cnt_current - clen) < netif->loop_cnt_current)); + netif->loop_cnt_current = (u16_t)(netif->loop_cnt_current - clen); +#endif /* LWIP_LOOPBACK_MAX_PBUFS */ + + /* 'in_end' now points to the last pbuf from 'in' */ + if (in_end == netif->loop_last) { + /* this was the last pbuf in the list */ + netif->loop_first = netif->loop_last = NULL; + } else { + /* pop the pbuf off the list */ + netif->loop_first = in_end->next; + LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL); + } + /* De-queue the pbuf from its successors on the 'loop_' list. */ + in_end->next = NULL; + SYS_ARCH_UNPROTECT(lev); + + in->if_idx = netif_get_index(netif); + + LINK_STATS_INC(link.recv); + MIB2_STATS_NETIF_ADD(stats_if, ifinoctets, in->tot_len); + MIB2_STATS_NETIF_INC(stats_if, ifinucastpkts); + /* loopback packets are always IP packets! */ + if (ip_input(in, netif) != ERR_OK) { + pbuf_free(in); + } + SYS_ARCH_PROTECT(lev); + } + SYS_ARCH_UNPROTECT(lev); +} + +#if !LWIP_NETIF_LOOPBACK_MULTITHREADING +/** + * Calls netif_poll() for every netif on the netif_list. + */ +void +netif_poll_all(void) +{ + struct netif *netif; + /* loop through netifs */ + NETIF_FOREACH(netif) { + netif_poll(netif); + } +} +#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */ +#endif /* ENABLE_LOOPBACK */ + +#if LWIP_NUM_NETIF_CLIENT_DATA > 0 +/** + * @ingroup netif_cd + * Allocate an index to store data in client_data member of struct netif. + * Returned value is an index in mentioned array. + * @see LWIP_NUM_NETIF_CLIENT_DATA + */ +u8_t +netif_alloc_client_data_id(void) +{ + u8_t result = netif_client_id; + netif_client_id++; + + LWIP_ASSERT_CORE_LOCKED(); + +#if LWIP_NUM_NETIF_CLIENT_DATA > 256 +#error LWIP_NUM_NETIF_CLIENT_DATA must be <= 256 +#endif + LWIP_ASSERT("Increase LWIP_NUM_NETIF_CLIENT_DATA in lwipopts.h", result < LWIP_NUM_NETIF_CLIENT_DATA); + return (u8_t)(result + LWIP_NETIF_CLIENT_DATA_INDEX_MAX); +} +#endif + +#if LWIP_IPV6 +/** + * @ingroup netif_ip6 + * Change an IPv6 address of a network interface + * + * @param netif the network interface to change + * @param addr_idx index of the IPv6 address + * @param addr6 the new IPv6 address + * + * @note call netif_ip6_addr_set_state() to set the address valid/temptative + */ +void +netif_ip6_addr_set(struct netif *netif, s8_t addr_idx, const ip6_addr_t *addr6) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ASSERT("netif_ip6_addr_set: invalid netif", netif != NULL); + LWIP_ASSERT("netif_ip6_addr_set: invalid addr6", addr6 != NULL); + + netif_ip6_addr_set_parts(netif, addr_idx, addr6->addr[0], addr6->addr[1], + addr6->addr[2], addr6->addr[3]); +} + +/* + * Change an IPv6 address of a network interface (internal version taking 4 * u32_t) + * + * @param netif the network interface to change + * @param addr_idx index of the IPv6 address + * @param i0 word0 of the new IPv6 address + * @param i1 word1 of the new IPv6 address + * @param i2 word2 of the new IPv6 address + * @param i3 word3 of the new IPv6 address + */ +void +netif_ip6_addr_set_parts(struct netif *netif, s8_t addr_idx, u32_t i0, u32_t i1, u32_t i2, u32_t i3) +{ + ip_addr_t old_addr; + ip_addr_t new_ipaddr; + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_ASSERT("invalid index", addr_idx < LWIP_IPV6_NUM_ADDRESSES); + + ip6_addr_copy(*ip_2_ip6(&old_addr), *netif_ip6_addr(netif, addr_idx)); + IP_SET_TYPE_VAL(old_addr, IPADDR_TYPE_V6); + + /* address is actually being changed? */ + if ((ip_2_ip6(&old_addr)->addr[0] != i0) || (ip_2_ip6(&old_addr)->addr[1] != i1) || + (ip_2_ip6(&old_addr)->addr[2] != i2) || (ip_2_ip6(&old_addr)->addr[3] != i3)) { + LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_ip6_addr_set: netif address being changed\n")); + + IP_ADDR6(&new_ipaddr, i0, i1, i2, i3); + ip6_addr_assign_zone(ip_2_ip6(&new_ipaddr), IP6_UNICAST, netif); + + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, addr_idx))) { + netif_do_ip_addr_changed(netif_ip_addr6(netif, addr_idx), &new_ipaddr); + } + /* @todo: remove/readd mib2 ip6 entries? */ + + ip_addr_copy(netif->ip6_addr[addr_idx], new_ipaddr); + + if (ip6_addr_isvalid(netif_ip6_addr_state(netif, addr_idx))) { + netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV6); + NETIF_STATUS_CALLBACK(netif); + } + +#if LWIP_NETIF_EXT_STATUS_CALLBACK + { + netif_ext_callback_args_t args; + args.ipv6_set.addr_index = addr_idx; + args.ipv6_set.old_address = &old_addr; + netif_invoke_ext_callback(netif, LWIP_NSC_IPV6_SET, &args); + } +#endif + } + + LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: IPv6 address %d of interface %c%c set to %s/0x%"X8_F"\n", + addr_idx, netif->name[0], netif->name[1], ip6addr_ntoa(netif_ip6_addr(netif, addr_idx)), + netif_ip6_addr_state(netif, addr_idx))); +} + +/** + * @ingroup netif_ip6 + * Change the state of an IPv6 address of a network interface + * (INVALID, TEMPTATIVE, PREFERRED, DEPRECATED, where TEMPTATIVE + * includes the number of checks done, see ip6_addr.h) + * + * @param netif the network interface to change + * @param addr_idx index of the IPv6 address + * @param state the new IPv6 address state + */ +void +netif_ip6_addr_set_state(struct netif *netif, s8_t addr_idx, u8_t state) +{ + u8_t old_state; + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("netif != NULL", netif != NULL); + LWIP_ASSERT("invalid index", addr_idx < LWIP_IPV6_NUM_ADDRESSES); + + old_state = netif_ip6_addr_state(netif, addr_idx); + /* state is actually being changed? */ + if (old_state != state) { + u8_t old_valid = old_state & IP6_ADDR_VALID; + u8_t new_valid = state & IP6_ADDR_VALID; + LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_ip6_addr_set_state: netif address state being changed\n")); + +#if LWIP_IPV6_MLD + /* Reevaluate solicited-node multicast group membership. */ + if (netif->flags & NETIF_FLAG_MLD6) { + nd6_adjust_mld_membership(netif, addr_idx, state); + } +#endif /* LWIP_IPV6_MLD */ + + if (old_valid && !new_valid) { + /* address about to be removed by setting invalid */ + netif_do_ip_addr_changed(netif_ip_addr6(netif, addr_idx), NULL); + /* @todo: remove mib2 ip6 entries? */ + } + netif->ip6_addr_state[addr_idx] = state; + + if (!old_valid && new_valid) { + /* address added by setting valid */ + /* This is a good moment to check that the address is properly zoned. */ + IP6_ADDR_ZONECHECK_NETIF(netif_ip6_addr(netif, addr_idx), netif); + /* @todo: add mib2 ip6 entries? */ + netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV6); + } + if ((old_state & ~IP6_ADDR_TENTATIVE_COUNT_MASK) != + (state & ~IP6_ADDR_TENTATIVE_COUNT_MASK)) { + /* address state has changed -> call the callback function */ + NETIF_STATUS_CALLBACK(netif); + } + +#if LWIP_NETIF_EXT_STATUS_CALLBACK + { + netif_ext_callback_args_t args; + args.ipv6_addr_state_changed.addr_index = addr_idx; + args.ipv6_addr_state_changed.old_state = old_state; + args.ipv6_addr_state_changed.address = netif_ip_addr6(netif, addr_idx); + netif_invoke_ext_callback(netif, LWIP_NSC_IPV6_ADDR_STATE_CHANGED, &args); + } +#endif + } + LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: IPv6 address %d of interface %c%c set to %s/0x%"X8_F"\n", + addr_idx, netif->name[0], netif->name[1], ip6addr_ntoa(netif_ip6_addr(netif, addr_idx)), + netif_ip6_addr_state(netif, addr_idx))); +} + +/** + * Checks if a specific local address is present on the netif and returns its + * index. Depending on its state, it may or may not be assigned to the + * interface (as per RFC terminology). + * + * The given address may or may not be zoned (i.e., have a zone index other + * than IP6_NO_ZONE). If the address is zoned, it must have the correct zone + * for the given netif, or no match will be found. + * + * @param netif the netif to check + * @param ip6addr the IPv6 address to find + * @return >= 0: address found, this is its index + * -1: address not found on this netif + */ +s8_t +netif_get_ip6_addr_match(struct netif *netif, const ip6_addr_t *ip6addr) +{ + s8_t i; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ASSERT("netif_get_ip6_addr_match: invalid netif", netif != NULL); + LWIP_ASSERT("netif_get_ip6_addr_match: invalid ip6addr", ip6addr != NULL); + +#if LWIP_IPV6_SCOPES + if (ip6_addr_has_zone(ip6addr) && !ip6_addr_test_zone(ip6addr, netif)) { + return -1; /* wrong zone, no match */ + } +#endif /* LWIP_IPV6_SCOPES */ + + for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (!ip6_addr_isinvalid(netif_ip6_addr_state(netif, i)) && + ip6_addr_zoneless_eq(netif_ip6_addr(netif, i), ip6addr)) { + return i; + } + } + return -1; +} + +/** + * @ingroup netif_ip6 + * Create a link-local IPv6 address on a netif (stored in slot 0) + * + * @param netif the netif to create the address on + * @param from_mac_48bit if != 0, assume hwadr is a 48-bit MAC address (std conversion) + * if == 0, use hwaddr directly as interface ID + */ +void +netif_create_ip6_linklocal_address(struct netif *netif, u8_t from_mac_48bit) +{ + u8_t i, addr_index; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ASSERT("netif_create_ip6_linklocal_address: invalid netif", netif != NULL); + + /* Link-local prefix. */ + ip_2_ip6(&netif->ip6_addr[0])->addr[0] = PP_HTONL(0xfe800000ul); + ip_2_ip6(&netif->ip6_addr[0])->addr[1] = 0; + + /* Generate interface ID. */ + if (from_mac_48bit) { + /* Assume hwaddr is a 48-bit IEEE 802 MAC. Convert to EUI-64 address. Complement Group bit. */ + ip_2_ip6(&netif->ip6_addr[0])->addr[2] = lwip_htonl((((u32_t)(netif->hwaddr[0] ^ 0x02)) << 24) | + ((u32_t)(netif->hwaddr[1]) << 16) | + ((u32_t)(netif->hwaddr[2]) << 8) | + (0xff)); + ip_2_ip6(&netif->ip6_addr[0])->addr[3] = lwip_htonl((u32_t)(0xfeul << 24) | + ((u32_t)(netif->hwaddr[3]) << 16) | + ((u32_t)(netif->hwaddr[4]) << 8) | + (netif->hwaddr[5])); + } else { + /* Use hwaddr directly as interface ID. */ + ip_2_ip6(&netif->ip6_addr[0])->addr[2] = 0; + ip_2_ip6(&netif->ip6_addr[0])->addr[3] = 0; + + addr_index = 3; + for (i = 0; (i < 8) && (i < netif->hwaddr_len); i++) { + if (i == 4) { + addr_index--; + } + ip_2_ip6(&netif->ip6_addr[0])->addr[addr_index] |= lwip_htonl(((u32_t)(netif->hwaddr[netif->hwaddr_len - i - 1])) << (8 * (i & 0x03))); + } + } + + /* Set a link-local zone. Even though the zone is implied by the owning + * netif, setting the zone anyway has two important conceptual advantages: + * 1) it avoids the need for a ton of exceptions in internal code, allowing + * e.g. ip6_addr_eq() to be used on local addresses; + * 2) the properly zoned address is visible externally, e.g. when any outside + * code enumerates available addresses or uses one to bind a socket. + * Any external code unaware of address scoping is likely to just ignore the + * zone field, so this should not create any compatibility problems. */ + ip6_addr_assign_zone(ip_2_ip6(&netif->ip6_addr[0]), IP6_UNICAST, netif); + + /* Set address state. */ +#if LWIP_IPV6_DUP_DETECT_ATTEMPTS + /* Will perform duplicate address detection (DAD). */ + netif_ip6_addr_set_state(netif, 0, IP6_ADDR_TENTATIVE); +#else + /* Consider address valid. */ + netif_ip6_addr_set_state(netif, 0, IP6_ADDR_PREFERRED); +#endif /* LWIP_IPV6_AUTOCONFIG */ +} + +/** + * @ingroup netif_ip6 + * This function allows for the easy addition of a new IPv6 address to an interface. + * It takes care of finding an empty slot and then sets the address tentative + * (to make sure that all the subsequent processing happens). + * + * @param netif netif to add the address on + * @param ip6addr address to add + * @param chosen_idx if != NULL, the chosen IPv6 address index will be stored here + */ +err_t +netif_add_ip6_address(struct netif *netif, const ip6_addr_t *ip6addr, s8_t *chosen_idx) +{ + s8_t i; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ASSERT("netif_add_ip6_address: invalid netif", netif != NULL); + LWIP_ASSERT("netif_add_ip6_address: invalid ip6addr", ip6addr != NULL); + + i = netif_get_ip6_addr_match(netif, ip6addr); + if (i >= 0) { + /* Address already added */ + if (chosen_idx != NULL) { + *chosen_idx = i; + } + return ERR_OK; + } + + /* Find a free slot. The first one is reserved for link-local addresses. */ + for (i = ip6_addr_islinklocal(ip6addr) ? 0 : 1; i < LWIP_IPV6_NUM_ADDRESSES; i++) { + if (ip6_addr_isinvalid(netif_ip6_addr_state(netif, i))) { + ip_addr_copy_from_ip6(netif->ip6_addr[i], *ip6addr); + ip6_addr_assign_zone(ip_2_ip6(&netif->ip6_addr[i]), IP6_UNICAST, netif); + netif_ip6_addr_set_state(netif, i, IP6_ADDR_TENTATIVE); + if (chosen_idx != NULL) { + *chosen_idx = i; + } + return ERR_OK; + } + } + + if (chosen_idx != NULL) { + *chosen_idx = -1; + } + return ERR_VAL; +} + +/** Dummy IPv6 output function for netifs not supporting IPv6 + */ +static err_t +netif_null_output_ip6(struct netif *netif, struct pbuf *p, const ip6_addr_t *ipaddr) +{ + LWIP_UNUSED_ARG(netif); + LWIP_UNUSED_ARG(p); + LWIP_UNUSED_ARG(ipaddr); + + return ERR_IF; +} +#endif /* LWIP_IPV6 */ + +#if LWIP_IPV4 +/** Dummy IPv4 output function for netifs not supporting IPv4 + */ +static err_t +netif_null_output_ip4(struct netif *netif, struct pbuf *p, const ip4_addr_t *ipaddr) +{ + LWIP_UNUSED_ARG(netif); + LWIP_UNUSED_ARG(p); + LWIP_UNUSED_ARG(ipaddr); + + return ERR_IF; +} +#endif /* LWIP_IPV4 */ + +/** +* @ingroup netif +* Return the interface index for the netif with name +* or NETIF_NO_INDEX if not found/on error +* +* @param name the name of the netif +*/ +u8_t +netif_name_to_index(const char *name) +{ + struct netif *netif = netif_find(name); + if (netif != NULL) { + return netif_get_index(netif); + } + /* No name found, return invalid index */ + return NETIF_NO_INDEX; +} + +/** +* @ingroup netif +* Return the interface name for the netif matching index +* or NULL if not found/on error +* +* @param idx the interface index of the netif +* @param name char buffer of at least NETIF_NAMESIZE bytes +*/ +char * +netif_index_to_name(u8_t idx, char *name) +{ + struct netif *netif = netif_get_by_index(idx); + + if (netif != NULL) { + name[0] = netif->name[0]; + name[1] = netif->name[1]; + lwip_itoa(&name[2], NETIF_NAMESIZE - 2, netif_index_to_num(idx)); + return name; + } + return NULL; +} + +/** +* @ingroup netif +* Return the interface for the netif index +* +* @param idx index of netif to find +*/ +struct netif * +netif_get_by_index(u8_t idx) +{ + struct netif *netif; + + LWIP_ASSERT_CORE_LOCKED(); + + if (idx != NETIF_NO_INDEX) { + NETIF_FOREACH(netif) { + if (idx == netif_get_index(netif)) { + return netif; /* found! */ + } + } + } + + return NULL; +} + +/** + * @ingroup netif + * Find a network interface by searching for its name + * + * @param name the name of the netif (like netif->name) plus concatenated number + * in ascii representation (e.g. 'en0') + */ +struct netif * +netif_find(const char *name) +{ + struct netif *netif; + u8_t num; + + LWIP_ASSERT_CORE_LOCKED(); + + if (name == NULL) { + return NULL; + } + + num = (u8_t)atoi(&name[2]); + if (!num && (name[2] != '0')) { + /* this means atoi has failed */ + return NULL; + } + + NETIF_FOREACH(netif) { + if (num == netif->num && + name[0] == netif->name[0] && + name[1] == netif->name[1]) { + LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1])); + return netif; + } + } + LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1])); + return NULL; +} + +#if LWIP_NETIF_EXT_STATUS_CALLBACK +/** + * @ingroup netif + * Add extended netif events listener + * @param callback pointer to listener structure + * @param fn callback function + */ +void +netif_add_ext_callback(netif_ext_callback_t *callback, netif_ext_callback_fn fn) +{ + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("callback must be != NULL", callback != NULL); + LWIP_ASSERT("fn must be != NULL", fn != NULL); + + callback->callback_fn = fn; + callback->next = ext_callback; + ext_callback = callback; +} + +/** + * @ingroup netif + * Remove extended netif events listener + * @param callback pointer to listener structure + */ +void +netif_remove_ext_callback(netif_ext_callback_t* callback) +{ + netif_ext_callback_t *last, *iter; + + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("callback must be != NULL", callback != NULL); + + if (ext_callback == NULL) { + return; + } + + if (callback == ext_callback) { + ext_callback = ext_callback->next; + } else { + last = ext_callback; + for (iter = ext_callback->next; iter != NULL; last = iter, iter = iter->next) { + if (iter == callback) { + LWIP_ASSERT("last != NULL", last != NULL); + last->next = callback->next; + break; + } + } + } + callback->next = NULL; +} + +/** + * Invoke extended netif status event + * @param netif netif that is affected by change + * @param reason change reason + * @param args depends on reason, see reason description + */ +void +netif_invoke_ext_callback(struct netif *netif, netif_nsc_reason_t reason, const netif_ext_callback_args_t *args) +{ + netif_ext_callback_t *callback = ext_callback; + + LWIP_ASSERT("netif must be != NULL", netif != NULL); + + while (callback != NULL) { + /* cache next pointer: the callback might unregister itself */ + netif_ext_callback_t *next = callback->next; + callback->callback_fn(netif, reason, args); + callback = next; + } +} +#endif /* LWIP_NETIF_EXT_STATUS_CALLBACK */ diff --git a/lib/lwip/core/pbuf.c b/lib/lwip/core/pbuf.c new file mode 100644 index 0000000000..1fb64d4115 --- /dev/null +++ b/lib/lwip/core/pbuf.c @@ -0,0 +1,1545 @@ +/** + * @file + * Packet buffer management + */ + +/** + * @defgroup pbuf Packet buffers (PBUF) + * @ingroup infrastructure + * + * Packets are built from the pbuf data structure. It supports dynamic + * memory allocation for packet contents or can reference externally + * managed packet contents both in RAM and ROM. Quick allocation for + * incoming packets is provided through pools with fixed sized pbufs. + * + * A packet may span over multiple pbufs, chained as a singly linked + * list. This is called a "pbuf chain". + * + * Multiple packets may be queued, also using this singly linked list. + * This is called a "packet queue". + * + * So, a packet queue consists of one or more pbuf chains, each of + * which consist of one or more pbufs. CURRENTLY, PACKET QUEUES ARE + * NOT SUPPORTED!!! Use helper structs to queue multiple packets. + * + * The differences between a pbuf chain and a packet queue are very + * precise but subtle. + * + * The last pbuf of a packet has a ->tot_len field that equals the + * ->len field. It can be found by traversing the list. If the last + * pbuf of a packet has a ->next field other than NULL, more packets + * are on the queue. + * + * Therefore, looping through a pbuf of a single packet, has an + * loop end condition (tot_len == p->len), NOT (next == NULL). + * + * Example of custom pbuf usage: @ref zerocopyrx + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#include "lwip/pbuf.h" +#include "lwip/stats.h" +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/sys.h" +#include "lwip/netif.h" +#if LWIP_TCP && TCP_QUEUE_OOSEQ +#include "lwip/priv/tcp_priv.h" +#endif +#if LWIP_CHECKSUM_ON_COPY +#include "lwip/inet_chksum.h" +#endif + +#include <string.h> + +#define SIZEOF_STRUCT_PBUF LWIP_MEM_ALIGN_SIZE(sizeof(struct pbuf)) +/* Since the pool is created in memp, PBUF_POOL_BUFSIZE will be automatically + aligned there. Therefore, PBUF_POOL_BUFSIZE_ALIGNED can be used here. */ +#define PBUF_POOL_BUFSIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(PBUF_POOL_BUFSIZE) + +static const struct pbuf * +pbuf_skip_const(const struct pbuf *in, u16_t in_offset, u16_t *out_offset); + +#if !LWIP_TCP || !TCP_QUEUE_OOSEQ || !PBUF_POOL_FREE_OOSEQ +#define PBUF_POOL_IS_EMPTY() +#else /* !LWIP_TCP || !TCP_QUEUE_OOSEQ || !PBUF_POOL_FREE_OOSEQ */ + +#if !NO_SYS +#ifndef PBUF_POOL_FREE_OOSEQ_QUEUE_CALL +#include "lwip/tcpip.h" +#define PBUF_POOL_FREE_OOSEQ_QUEUE_CALL() do { \ + if (tcpip_try_callback(pbuf_free_ooseq_callback, NULL) != ERR_OK) { \ + SYS_ARCH_PROTECT(old_level); \ + pbuf_free_ooseq_pending = 0; \ + SYS_ARCH_UNPROTECT(old_level); \ + } } while(0) +#endif /* PBUF_POOL_FREE_OOSEQ_QUEUE_CALL */ +#endif /* !NO_SYS */ + +volatile u8_t pbuf_free_ooseq_pending; +#define PBUF_POOL_IS_EMPTY() pbuf_pool_is_empty() + +/** + * Attempt to reclaim some memory from queued out-of-sequence TCP segments + * if we run out of pool pbufs. It's better to give priority to new packets + * if we're running out. + * + * This must be done in the correct thread context therefore this function + * can only be used with NO_SYS=0 and through tcpip_callback. + */ +#if !NO_SYS +static +#endif /* !NO_SYS */ +void +pbuf_free_ooseq(void) +{ + struct tcp_pcb *pcb; + SYS_ARCH_SET(pbuf_free_ooseq_pending, 0); + + for (pcb = tcp_active_pcbs; NULL != pcb; pcb = pcb->next) { + if (pcb->ooseq != NULL) { + /** Free the ooseq pbufs of one PCB only */ + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_free_ooseq: freeing out-of-sequence pbufs\n")); + tcp_free_ooseq(pcb); + return; + } + } +} + +#if !NO_SYS +/** + * Just a callback function for tcpip_callback() that calls pbuf_free_ooseq(). + */ +static void +pbuf_free_ooseq_callback(void *arg) +{ + LWIP_UNUSED_ARG(arg); + pbuf_free_ooseq(); +} +#endif /* !NO_SYS */ + +/** Queue a call to pbuf_free_ooseq if not already queued. */ +static void +pbuf_pool_is_empty(void) +{ +#ifndef PBUF_POOL_FREE_OOSEQ_QUEUE_CALL + SYS_ARCH_SET(pbuf_free_ooseq_pending, 1); +#else /* PBUF_POOL_FREE_OOSEQ_QUEUE_CALL */ + u8_t queued; + SYS_ARCH_DECL_PROTECT(old_level); + SYS_ARCH_PROTECT(old_level); + queued = pbuf_free_ooseq_pending; + pbuf_free_ooseq_pending = 1; + SYS_ARCH_UNPROTECT(old_level); + + if (!queued) { + /* queue a call to pbuf_free_ooseq if not already queued */ + PBUF_POOL_FREE_OOSEQ_QUEUE_CALL(); + } +#endif /* PBUF_POOL_FREE_OOSEQ_QUEUE_CALL */ +} +#endif /* !LWIP_TCP || !TCP_QUEUE_OOSEQ || !PBUF_POOL_FREE_OOSEQ */ + +/* Initialize members of struct pbuf after allocation */ +static void +pbuf_init_alloced_pbuf(struct pbuf *p, void *payload, u16_t tot_len, u16_t len, pbuf_type type, u8_t flags) +{ + p->next = NULL; + p->payload = payload; + p->tot_len = tot_len; + p->len = len; + p->type_internal = (u8_t)type; + p->flags = flags; + p->ref = 1; + p->if_idx = NETIF_NO_INDEX; +} + +/** + * @ingroup pbuf + * Allocates a pbuf of the given type (possibly a chain for PBUF_POOL type). + * + * The actual memory allocated for the pbuf is determined by the + * layer at which the pbuf is allocated and the requested size + * (from the size parameter). + * + * @param layer header size + * @param length size of the pbuf's payload + * @param type this parameter decides how and where the pbuf + * should be allocated as follows: + * + * - PBUF_RAM: buffer memory for pbuf is allocated as one large + * chunk. This includes protocol headers as well. + * - PBUF_ROM: no buffer memory is allocated for the pbuf, even for + * protocol headers. Additional headers must be prepended + * by allocating another pbuf and chain in to the front of + * the ROM pbuf. It is assumed that the memory used is really + * similar to ROM in that it is immutable and will not be + * changed. Memory which is dynamic should generally not + * be attached to PBUF_ROM pbufs. Use PBUF_REF instead. + * - PBUF_REF: no buffer memory is allocated for the pbuf, even for + * protocol headers. It is assumed that the pbuf is only + * being used in a single thread. If the pbuf gets queued, + * then pbuf_take should be called to copy the buffer. + * - PBUF_POOL: the pbuf is allocated as a pbuf chain, with pbufs from + * the pbuf pool that is allocated during pbuf_init(). + * + * @return the allocated pbuf. If multiple pbufs where allocated, this + * is the first pbuf of a pbuf chain. + */ +struct pbuf * +pbuf_alloc(pbuf_layer layer, u16_t length, pbuf_type type) +{ + struct pbuf *p; + u16_t offset = (u16_t)layer; + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_alloc(length=%"U16_F")\n", length)); + + switch (type) { + case PBUF_REF: /* fall through */ + case PBUF_ROM: + p = pbuf_alloc_reference(NULL, length, type); + break; + case PBUF_POOL: { + struct pbuf *q, *last; + u16_t rem_len; /* remaining length */ + p = NULL; + last = NULL; + rem_len = length; + do { + u16_t qlen; + q = (struct pbuf *)memp_malloc(MEMP_PBUF_POOL); + if (q == NULL) { + PBUF_POOL_IS_EMPTY(); + /* free chain so far allocated */ + if (p) { + pbuf_free(p); + } + /* bail out unsuccessfully */ + return NULL; + } + qlen = LWIP_MIN(rem_len, (u16_t)(PBUF_POOL_BUFSIZE_ALIGNED - LWIP_MEM_ALIGN_SIZE(offset))); + pbuf_init_alloced_pbuf(q, LWIP_MEM_ALIGN((void *)((u8_t *)q + SIZEOF_STRUCT_PBUF + offset)), + rem_len, qlen, type, 0); + LWIP_ASSERT("pbuf_alloc: pbuf q->payload properly aligned", + ((mem_ptr_t)q->payload % MEM_ALIGNMENT) == 0); + LWIP_ASSERT("PBUF_POOL_BUFSIZE must be bigger than MEM_ALIGNMENT", + (PBUF_POOL_BUFSIZE_ALIGNED - LWIP_MEM_ALIGN_SIZE(offset)) > 0 ); + if (p == NULL) { + /* allocated head of pbuf chain (into p) */ + p = q; + } else { + /* make previous pbuf point to this pbuf */ + last->next = q; + } + last = q; + rem_len = (u16_t)(rem_len - qlen); + offset = 0; + } while (rem_len > 0); + break; + } + case PBUF_RAM: { + mem_size_t payload_len = (mem_size_t)(LWIP_MEM_ALIGN_SIZE(offset) + LWIP_MEM_ALIGN_SIZE(length)); + mem_size_t alloc_len = (mem_size_t)(LWIP_MEM_ALIGN_SIZE(SIZEOF_STRUCT_PBUF) + payload_len); + + /* bug #50040: Check for integer overflow when calculating alloc_len */ + if ((payload_len < LWIP_MEM_ALIGN_SIZE(length)) || + (alloc_len < LWIP_MEM_ALIGN_SIZE(length))) { + return NULL; + } + + /* If pbuf is to be allocated in RAM, allocate memory for it. */ + p = (struct pbuf *)mem_malloc(alloc_len); + if (p == NULL) { + return NULL; + } + pbuf_init_alloced_pbuf(p, LWIP_MEM_ALIGN((void *)((u8_t *)p + SIZEOF_STRUCT_PBUF + offset)), + length, length, type, 0); + LWIP_ASSERT("pbuf_alloc: pbuf->payload properly aligned", + ((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0); + break; + } + default: + LWIP_ASSERT("pbuf_alloc: erroneous type", 0); + return NULL; + } + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_alloc(length=%"U16_F") == %p\n", length, (void *)p)); + return p; +} + +/** + * @ingroup pbuf + * Allocates a pbuf for referenced data. + * Referenced data can be volatile (PBUF_REF) or long-lived (PBUF_ROM). + * + * The actual memory allocated for the pbuf is determined by the + * layer at which the pbuf is allocated and the requested size + * (from the size parameter). + * + * @param payload referenced payload + * @param length size of the pbuf's payload + * @param type this parameter decides how and where the pbuf + * should be allocated as follows: + * + * - PBUF_ROM: It is assumed that the memory used is really + * similar to ROM in that it is immutable and will not be + * changed. Memory which is dynamic should generally not + * be attached to PBUF_ROM pbufs. Use PBUF_REF instead. + * - PBUF_REF: It is assumed that the pbuf is only + * being used in a single thread. If the pbuf gets queued, + * then pbuf_take should be called to copy the buffer. + * + * @return the allocated pbuf. + */ +struct pbuf * +pbuf_alloc_reference(void *payload, u16_t length, pbuf_type type) +{ + struct pbuf *p; + LWIP_ASSERT("invalid pbuf_type", (type == PBUF_REF) || (type == PBUF_ROM)); + /* only allocate memory for the pbuf structure */ + p = (struct pbuf *)memp_malloc(MEMP_PBUF); + if (p == NULL) { + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("pbuf_alloc_reference: Could not allocate MEMP_PBUF for PBUF_%s.\n", + (type == PBUF_ROM) ? "ROM" : "REF")); + return NULL; + } + pbuf_init_alloced_pbuf(p, payload, length, length, type, 0); + return p; +} + + +#if LWIP_SUPPORT_CUSTOM_PBUF +/** + * @ingroup pbuf + * Initialize a custom pbuf (already allocated). + * Example of custom pbuf usage: @ref zerocopyrx + * + * @param l header size + * @param length size of the pbuf's payload + * @param type type of the pbuf (only used to treat the pbuf accordingly, as + * this function allocates no memory) + * @param p pointer to the custom pbuf to initialize (already allocated) + * @param payload_mem pointer to the buffer that is used for payload and headers, + * must be at least big enough to hold 'length' plus the header size, + * may be NULL if set later. + * ATTENTION: The caller is responsible for correct alignment of this buffer!! + * @param payload_mem_len the size of the 'payload_mem' buffer, must be at least + * big enough to hold 'length' plus the header size + */ +struct pbuf * +pbuf_alloced_custom(pbuf_layer l, u16_t length, pbuf_type type, struct pbuf_custom *p, + void *payload_mem, u16_t payload_mem_len) +{ + u16_t offset = (u16_t)l; + void *payload; + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_alloced_custom(length=%"U16_F")\n", length)); + + if (LWIP_MEM_ALIGN_SIZE(offset) + length > payload_mem_len) { + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_LEVEL_WARNING, ("pbuf_alloced_custom(length=%"U16_F") buffer too short\n", length)); + return NULL; + } + + if (payload_mem != NULL) { + payload = (u8_t *)payload_mem + LWIP_MEM_ALIGN_SIZE(offset); + } else { + payload = NULL; + } + pbuf_init_alloced_pbuf(&p->pbuf, payload, length, length, type, PBUF_FLAG_IS_CUSTOM); + return &p->pbuf; +} +#endif /* LWIP_SUPPORT_CUSTOM_PBUF */ + +/** + * @ingroup pbuf + * Shrink a pbuf chain to a desired length. + * + * @param p pbuf to shrink. + * @param new_len desired new length of pbuf chain + * + * Depending on the desired length, the first few pbufs in a chain might + * be skipped and left unchanged. The new last pbuf in the chain will be + * resized, and any remaining pbufs will be freed. + * + * @note If the pbuf is ROM/REF, only the ->tot_len and ->len fields are adjusted. + * @note May not be called on a packet queue. + * + * @note Despite its name, pbuf_realloc cannot grow the size of a pbuf (chain). + */ +void +pbuf_realloc(struct pbuf *p, u16_t new_len) +{ + struct pbuf *q; + u16_t rem_len; /* remaining length */ + u16_t shrink; + + LWIP_ASSERT("pbuf_realloc: p != NULL", p != NULL); + + /* desired length larger than current length? */ + if (new_len >= p->tot_len) { + /* enlarging not yet supported */ + return; + } + + /* the pbuf chain grows by (new_len - p->tot_len) bytes + * (which may be negative in case of shrinking) */ + shrink = (u16_t)(p->tot_len - new_len); + + /* first, step over any pbufs that should remain in the chain */ + rem_len = new_len; + q = p; + /* should this pbuf be kept? */ + while (rem_len > q->len) { + /* decrease remaining length by pbuf length */ + rem_len = (u16_t)(rem_len - q->len); + /* decrease total length indicator */ + q->tot_len = (u16_t)(q->tot_len - shrink); + /* proceed to next pbuf in chain */ + q = q->next; + LWIP_ASSERT("pbuf_realloc: q != NULL", q != NULL); + } + /* we have now reached the new last pbuf (in q) */ + /* rem_len == desired length for pbuf q */ + + /* shrink allocated memory for PBUF_RAM */ + /* (other types merely adjust their length fields */ + if (pbuf_match_allocsrc(q, PBUF_TYPE_ALLOC_SRC_MASK_STD_HEAP) && (rem_len != q->len) +#if LWIP_SUPPORT_CUSTOM_PBUF + && ((q->flags & PBUF_FLAG_IS_CUSTOM) == 0) +#endif /* LWIP_SUPPORT_CUSTOM_PBUF */ + ) { + /* reallocate and adjust the length of the pbuf that will be split */ + struct pbuf *r = (struct pbuf *)mem_trim(q, (mem_size_t)(((u8_t *)q->payload - (u8_t *)q) + rem_len)); + LWIP_ASSERT("mem_trim returned r == NULL", r != NULL); + /* help to detect faulty overridden implementation of mem_trim */ + LWIP_ASSERT("mem_trim returned r != q", r == q); + LWIP_UNUSED_ARG(r); + } + /* adjust length fields for new last pbuf */ + q->len = rem_len; + q->tot_len = q->len; + + /* any remaining pbufs in chain? */ + if (q->next != NULL) { + /* free remaining pbufs in chain */ + pbuf_free(q->next); + } + /* q is last packet in chain */ + q->next = NULL; + +} + +/** + * Adjusts the payload pointer to reveal headers in the payload. + * @see pbuf_add_header. + * + * @param p pbuf to change the header size. + * @param header_size_increment Number of bytes to increment header size. + * @param force Allow 'header_size_increment > 0' for PBUF_REF/PBUF_ROM types + * + * @return non-zero on failure, zero on success. + * + */ +static u8_t +pbuf_add_header_impl(struct pbuf *p, size_t header_size_increment, u8_t force) +{ + u16_t type_internal; + void *payload; + u16_t increment_magnitude; + + LWIP_ASSERT("p != NULL", p != NULL); + if ((p == NULL) || (header_size_increment > 0xFFFF)) { + return 1; + } + if (header_size_increment == 0) { + return 0; + } + + increment_magnitude = (u16_t)header_size_increment; + /* Do not allow tot_len to wrap as a result. */ + if ((u16_t)(increment_magnitude + p->tot_len) < increment_magnitude) { + return 1; + } + + type_internal = p->type_internal; + + /* pbuf types containing payloads? */ + if (type_internal & PBUF_TYPE_FLAG_STRUCT_DATA_CONTIGUOUS) { + /* set new payload pointer */ + payload = (u8_t *)p->payload - header_size_increment; + /* boundary check fails? */ + if ((u8_t *)payload < (u8_t *)p + SIZEOF_STRUCT_PBUF) { + LWIP_DEBUGF( PBUF_DEBUG | LWIP_DBG_TRACE, + ("pbuf_add_header: failed as %p < %p (not enough space for new header size)\n", + (void *)payload, (void *)((u8_t *)p + SIZEOF_STRUCT_PBUF))); + /* bail out unsuccessfully */ + return 1; + } + /* pbuf types referring to external payloads? */ + } else { + /* hide a header in the payload? */ + if (force) { + payload = (u8_t *)p->payload - header_size_increment; + } else { + /* cannot expand payload to front (yet!) + * bail out unsuccessfully */ + return 1; + } + } + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_add_header: old %p new %p (%"U16_F")\n", + (void *)p->payload, (void *)payload, increment_magnitude)); + + /* modify pbuf fields */ + p->payload = payload; + p->len = (u16_t)(p->len + increment_magnitude); + p->tot_len = (u16_t)(p->tot_len + increment_magnitude); + + + return 0; +} + +/** + * Adjusts the payload pointer to reveal headers in the payload. + * + * Adjusts the ->payload pointer so that space for a header + * appears in the pbuf payload. + * + * The ->payload, ->tot_len and ->len fields are adjusted. + * + * @param p pbuf to change the header size. + * @param header_size_increment Number of bytes to increment header size which + * increases the size of the pbuf. New space is on the front. + * If header_size_increment is 0, this function does nothing and returns successful. + * + * PBUF_ROM and PBUF_REF type buffers cannot have their sizes increased, so + * the call will fail. A check is made that the increase in header size does + * not move the payload pointer in front of the start of the buffer. + * + * @return non-zero on failure, zero on success. + * + */ +u8_t +pbuf_add_header(struct pbuf *p, size_t header_size_increment) +{ + return pbuf_add_header_impl(p, header_size_increment, 0); +} + +/** + * Same as @ref pbuf_add_header but does not check if 'header_size > 0' is allowed. + * This is used internally only, to allow PBUF_REF for RX. + */ +u8_t +pbuf_add_header_force(struct pbuf *p, size_t header_size_increment) +{ + return pbuf_add_header_impl(p, header_size_increment, 1); +} + +/** + * Adjusts the payload pointer to hide headers in the payload. + * + * Adjusts the ->payload pointer so that space for a header + * disappears in the pbuf payload. + * + * The ->payload, ->tot_len and ->len fields are adjusted. + * + * @param p pbuf to change the header size. + * @param header_size_decrement Number of bytes to decrement header size which + * decreases the size of the pbuf. + * If header_size_decrement is 0, this function does nothing and returns successful. + * @return non-zero on failure, zero on success. + * + */ +u8_t +pbuf_remove_header(struct pbuf *p, size_t header_size_decrement) +{ + void *payload; + u16_t increment_magnitude; + + LWIP_ASSERT("p != NULL", p != NULL); + if ((p == NULL) || (header_size_decrement > 0xFFFF)) { + return 1; + } + if (header_size_decrement == 0) { + return 0; + } + + increment_magnitude = (u16_t)header_size_decrement; + /* Check that we aren't going to move off the end of the pbuf */ + LWIP_ERROR("increment_magnitude <= p->len", (increment_magnitude <= p->len), return 1;); + + /* remember current payload pointer */ + payload = p->payload; + LWIP_UNUSED_ARG(payload); /* only used in LWIP_DEBUGF below */ + + /* increase payload pointer (guarded by length check above) */ + p->payload = (u8_t *)p->payload + header_size_decrement; + /* modify pbuf length fields */ + p->len = (u16_t)(p->len - increment_magnitude); + p->tot_len = (u16_t)(p->tot_len - increment_magnitude); + + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_remove_header: old %p new %p (%"U16_F")\n", + (void *)payload, (void *)p->payload, increment_magnitude)); + + return 0; +} + +static u8_t +pbuf_header_impl(struct pbuf *p, s16_t header_size_increment, u8_t force) +{ + if (header_size_increment < 0) { + return pbuf_remove_header(p, (size_t) - header_size_increment); + } else { + return pbuf_add_header_impl(p, (size_t)header_size_increment, force); + } +} + +/** + * Adjusts the payload pointer to hide or reveal headers in the payload. + * + * Adjusts the ->payload pointer so that space for a header + * (dis)appears in the pbuf payload. + * + * The ->payload, ->tot_len and ->len fields are adjusted. + * + * @param p pbuf to change the header size. + * @param header_size_increment Number of bytes to increment header size which + * increases the size of the pbuf. New space is on the front. + * (Using a negative value decreases the header size.) + * If header_size_increment is 0, this function does nothing and returns successful. + * + * PBUF_ROM and PBUF_REF type buffers cannot have their sizes increased, so + * the call will fail. A check is made that the increase in header size does + * not move the payload pointer in front of the start of the buffer. + * @return non-zero on failure, zero on success. + * + */ +u8_t +pbuf_header(struct pbuf *p, s16_t header_size_increment) +{ + return pbuf_header_impl(p, header_size_increment, 0); +} + +/** + * Same as pbuf_header but does not check if 'header_size > 0' is allowed. + * This is used internally only, to allow PBUF_REF for RX. + */ +u8_t +pbuf_header_force(struct pbuf *p, s16_t header_size_increment) +{ + return pbuf_header_impl(p, header_size_increment, 1); +} + +/** Similar to pbuf_header(-size) but de-refs header pbufs for (size >= p->len) + * + * @param q pbufs to operate on + * @param size The number of bytes to remove from the beginning of the pbuf list. + * While size >= p->len, pbufs are freed. + * ATTENTION: this is the opposite direction as @ref pbuf_header, but + * takes an u16_t not s16_t! + * @return the new head pbuf + */ +struct pbuf * +pbuf_free_header(struct pbuf *q, u16_t size) +{ + struct pbuf *p = q; + u16_t free_left = size; + while (free_left && p) { + if (free_left >= p->len) { + struct pbuf *f = p; + free_left = (u16_t)(free_left - p->len); + p = p->next; + f->next = NULL; + pbuf_free(f); + } else { + pbuf_remove_header(p, free_left); + free_left = 0; + } + } + return p; +} + +/** + * @ingroup pbuf + * Dereference a pbuf chain or queue and deallocate any no-longer-used + * pbufs at the head of this chain or queue. + * + * Decrements the pbuf reference count. If it reaches zero, the pbuf is + * deallocated. + * + * For a pbuf chain, this is repeated for each pbuf in the chain, + * up to the first pbuf which has a non-zero reference count after + * decrementing. So, when all reference counts are one, the whole + * chain is free'd. + * + * @param p The pbuf (chain) to be dereferenced. + * + * @return the number of pbufs that were de-allocated + * from the head of the chain. + * + * @note the reference counter of a pbuf equals the number of pointers + * that refer to the pbuf (or into the pbuf). + * + * @internal examples: + * + * Assuming existing chains a->b->c with the following reference + * counts, calling pbuf_free(a) results in: + * + * 1->2->3 becomes ...1->3 + * 3->3->3 becomes 2->3->3 + * 1->1->2 becomes ......1 + * 2->1->1 becomes 1->1->1 + * 1->1->1 becomes ....... + * + */ +u8_t +pbuf_free(struct pbuf *p) +{ + u8_t alloc_src; + struct pbuf *q; + u8_t count; + + if (p == NULL) { + LWIP_ASSERT("p != NULL", p != NULL); + /* if assertions are disabled, proceed with debug output */ + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("pbuf_free(p == NULL) was called.\n")); + return 0; + } + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_free(%p)\n", (void *)p)); + + PERF_START; + + count = 0; + /* de-allocate all consecutive pbufs from the head of the chain that + * obtain a zero reference count after decrementing*/ + while (p != NULL) { + LWIP_PBUF_REF_T ref; + SYS_ARCH_DECL_PROTECT(old_level); + /* Since decrementing ref cannot be guaranteed to be a single machine operation + * we must protect it. We put the new ref into a local variable to prevent + * further protection. */ + SYS_ARCH_PROTECT(old_level); + /* all pbufs in a chain are referenced at least once */ + LWIP_ASSERT("pbuf_free: p->ref > 0", p->ref > 0); + /* decrease reference count (number of pointers to pbuf) */ + ref = --(p->ref); + SYS_ARCH_UNPROTECT(old_level); + /* this pbuf is no longer referenced to? */ + if (ref == 0) { + /* remember next pbuf in chain for next iteration */ + q = p->next; + LWIP_DEBUGF( PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_free: deallocating %p\n", (void *)p)); + alloc_src = pbuf_get_allocsrc(p); +#if LWIP_SUPPORT_CUSTOM_PBUF + /* is this a custom pbuf? */ + if ((p->flags & PBUF_FLAG_IS_CUSTOM) != 0) { + struct pbuf_custom *pc = (struct pbuf_custom *)p; + LWIP_ASSERT("pc->custom_free_function != NULL", pc->custom_free_function != NULL); + pc->custom_free_function(p); + } else +#endif /* LWIP_SUPPORT_CUSTOM_PBUF */ + { + /* is this a pbuf from the pool? */ + if (alloc_src == PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF_POOL) { + memp_free(MEMP_PBUF_POOL, p); + /* is this a ROM or RAM referencing pbuf? */ + } else if (alloc_src == PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF) { + memp_free(MEMP_PBUF, p); + /* type == PBUF_RAM */ + } else if (alloc_src == PBUF_TYPE_ALLOC_SRC_MASK_STD_HEAP) { + mem_free(p); + } else { + /* @todo: support freeing other types */ + LWIP_ASSERT("invalid pbuf type", 0); + } + } + count++; + /* proceed to next pbuf */ + p = q; + /* p->ref > 0, this pbuf is still referenced to */ + /* (and so the remaining pbufs in chain as well) */ + } else { + LWIP_DEBUGF( PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_free: %p has ref %"U16_F", ending here.\n", (void *)p, (u16_t)ref)); + /* stop walking through the chain */ + p = NULL; + } + } + PERF_STOP("pbuf_free"); + /* return number of de-allocated pbufs */ + return count; +} + +/** + * Count number of pbufs in a chain + * + * @param p first pbuf of chain + * @return the number of pbufs in a chain + */ +u16_t +pbuf_clen(const struct pbuf *p) +{ + u16_t len; + + len = 0; + while (p != NULL) { + ++len; + p = p->next; + } + return len; +} + +/** + * @ingroup pbuf + * Increment the reference count of the pbuf. + * + * @param p pbuf to increase reference counter of + * + */ +void +pbuf_ref(struct pbuf *p) +{ + /* pbuf given? */ + if (p != NULL) { + SYS_ARCH_SET(p->ref, (LWIP_PBUF_REF_T)(p->ref + 1)); + LWIP_ASSERT("pbuf ref overflow", p->ref > 0); + } +} + +/** + * @ingroup pbuf + * Concatenate two pbufs (each may be a pbuf chain) and take over + * the caller's reference of the tail pbuf. + * + * @note The caller MAY NOT reference the tail pbuf afterwards. + * Use pbuf_chain() for that purpose. + * + * This function explicitly does not check for tot_len overflow to prevent + * failing to queue too long pbufs. This can produce invalid pbufs, so + * handle with care! + * + * @see pbuf_chain() + */ +void +pbuf_cat(struct pbuf *h, struct pbuf *t) +{ + struct pbuf *p; + + LWIP_ERROR("(h != NULL) && (t != NULL) (programmer violates API)", + ((h != NULL) && (t != NULL)), return;); + + /* proceed to last pbuf of chain */ + for (p = h; p->next != NULL; p = p->next) { + /* add total length of second chain to all totals of first chain */ + p->tot_len = (u16_t)(p->tot_len + t->tot_len); + } + /* { p is last pbuf of first h chain, p->next == NULL } */ + LWIP_ASSERT("p->tot_len == p->len (of last pbuf in chain)", p->tot_len == p->len); + LWIP_ASSERT("p->next == NULL", p->next == NULL); + /* add total length of second chain to last pbuf total of first chain */ + p->tot_len = (u16_t)(p->tot_len + t->tot_len); + /* chain last pbuf of head (p) with first of tail (t) */ + p->next = t; + /* p->next now references t, but the caller will drop its reference to t, + * so netto there is no change to the reference count of t. + */ +} + +/** + * @ingroup pbuf + * Chain two pbufs (or pbuf chains) together. + * + * The caller MUST call pbuf_free(t) once it has stopped + * using it. Use pbuf_cat() instead if you no longer use t. + * + * @param h head pbuf (chain) + * @param t tail pbuf (chain) + * @note The pbufs MUST belong to the same packet. + * @note MAY NOT be called on a packet queue. + * + * The ->tot_len fields of all pbufs of the head chain are adjusted. + * The ->next field of the last pbuf of the head chain is adjusted. + * The ->ref field of the first pbuf of the tail chain is adjusted. + * + */ +void +pbuf_chain(struct pbuf *h, struct pbuf *t) +{ + pbuf_cat(h, t); + /* t is now referenced by h */ + pbuf_ref(t); + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_chain: %p references %p\n", (void *)h, (void *)t)); +} + +/** + * Dechains the first pbuf from its succeeding pbufs in the chain. + * + * Makes p->tot_len field equal to p->len. + * @param p pbuf to dechain + * @return remainder of the pbuf chain, or NULL if it was de-allocated. + * @note May not be called on a packet queue. + */ +struct pbuf * +pbuf_dechain(struct pbuf *p) +{ + struct pbuf *q; + u8_t tail_gone = 1; + /* tail */ + q = p->next; + /* pbuf has successor in chain? */ + if (q != NULL) { + /* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */ + LWIP_ASSERT("p->tot_len == p->len + q->tot_len", q->tot_len == p->tot_len - p->len); + /* enforce invariant if assertion is disabled */ + q->tot_len = (u16_t)(p->tot_len - p->len); + /* decouple pbuf from remainder */ + p->next = NULL; + /* total length of pbuf p is its own length only */ + p->tot_len = p->len; + /* q is no longer referenced by p, free it */ + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_dechain: unreferencing %p\n", (void *)q)); + tail_gone = pbuf_free(q); + if (tail_gone > 0) { + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, + ("pbuf_dechain: deallocated %p (as it is no longer referenced)\n", (void *)q)); + } + /* return remaining tail or NULL if deallocated */ + } + /* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */ + LWIP_ASSERT("p->tot_len == p->len", p->tot_len == p->len); + return ((tail_gone > 0) ? NULL : q); +} + +/** + * @ingroup pbuf + * Copy the contents of one packet buffer into another. + * + * @note Only one packet is copied, no packet queue! + * + * @param p_to pbuf destination of the copy + * @param p_from pbuf source of the copy + * + * @return ERR_OK if pbuf was copied + * ERR_ARG if one of the pbufs is NULL or p_to is not big + * enough to hold p_from + * ERR_VAL if any of the pbufs are part of a queue + */ +err_t +pbuf_copy(struct pbuf *p_to, const struct pbuf *p_from) +{ + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_copy(%p, %p)\n", + (const void *)p_to, (const void *)p_from)); + + LWIP_ERROR("pbuf_copy: invalid source", p_from != NULL, return ERR_ARG;); + return pbuf_copy_partial_pbuf(p_to, p_from, p_from->tot_len, 0); +} + +/** + * @ingroup pbuf + * Copy part or all of one packet buffer into another, to a specified offset. + * + * @note Only data in one packet is copied, no packet queue! + * @note Argument order is shared with pbuf_copy, but different than pbuf_copy_partial. + * + * @param p_to pbuf destination of the copy + * @param p_from pbuf source of the copy + * @param copy_len number of bytes to copy + * @param offset offset in destination pbuf where to copy to + * + * @return ERR_OK if copy_len bytes were copied + * ERR_ARG if one of the pbufs is NULL or p_from is shorter than copy_len + * or p_to is not big enough to hold copy_len at offset + * ERR_VAL if any of the pbufs are part of a queue + */ +err_t +pbuf_copy_partial_pbuf(struct pbuf *p_to, const struct pbuf *p_from, u16_t copy_len, u16_t offset) +{ + size_t offset_to = offset, offset_from = 0, len; + + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_copy_partial_pbuf(%p, %p, %"U16_F", %"U16_F")\n", + (const void *)p_to, (const void *)p_from, copy_len, offset)); + + /* is the copy_len in range? */ + LWIP_ERROR("pbuf_copy_partial_pbuf: copy_len bigger than source", ((p_from != NULL) && + (p_from->tot_len >= copy_len)), return ERR_ARG;); + /* is the target big enough to hold the source? */ + LWIP_ERROR("pbuf_copy_partial_pbuf: target not big enough", ((p_to != NULL) && + (p_to->tot_len >= (offset + copy_len))), return ERR_ARG;); + + /* iterate through pbuf chain */ + do { + /* copy one part of the original chain */ + if ((p_to->len - offset_to) >= (p_from->len - offset_from)) { + /* complete current p_from fits into current p_to */ + len = p_from->len - offset_from; + } else { + /* current p_from does not fit into current p_to */ + len = p_to->len - offset_to; + } + len = LWIP_MIN(copy_len, len); + MEMCPY((u8_t *)p_to->payload + offset_to, (u8_t *)p_from->payload + offset_from, len); + offset_to += len; + offset_from += len; + copy_len = (u16_t)(copy_len - len); + LWIP_ASSERT("offset_to <= p_to->len", offset_to <= p_to->len); + LWIP_ASSERT("offset_from <= p_from->len", offset_from <= p_from->len); + if (offset_from >= p_from->len) { + /* on to next p_from (if any) */ + offset_from = 0; + p_from = p_from->next; + LWIP_ERROR("p_from != NULL", (p_from != NULL) || (copy_len == 0), return ERR_ARG;); + } + if (offset_to == p_to->len) { + /* on to next p_to (if any) */ + offset_to = 0; + p_to = p_to->next; + LWIP_ERROR("p_to != NULL", (p_to != NULL) || (copy_len == 0), return ERR_ARG;); + } + + if ((p_from != NULL) && (p_from->len == p_from->tot_len)) { + /* don't copy more than one packet! */ + LWIP_ERROR("pbuf_copy_partial_pbuf() does not allow packet queues!", + (p_from->next == NULL), return ERR_VAL;); + } + if ((p_to != NULL) && (p_to->len == p_to->tot_len)) { + /* don't copy more than one packet! */ + LWIP_ERROR("pbuf_copy_partial_pbuf() does not allow packet queues!", + (p_to->next == NULL), return ERR_VAL;); + } + } while (copy_len); + LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE, ("pbuf_copy_partial_pbuf: copy complete.\n")); + return ERR_OK; +} + +/** + * @ingroup pbuf + * Copy (part of) the contents of a packet buffer + * to an application supplied buffer. + * + * @param buf the pbuf from which to copy data + * @param dataptr the application supplied buffer + * @param len length of data to copy (dataptr must be big enough). No more + * than buf->tot_len will be copied, irrespective of len + * @param offset offset into the packet buffer from where to begin copying len bytes + * @return the number of bytes copied, or 0 on failure + */ +u16_t +pbuf_copy_partial(const struct pbuf *buf, void *dataptr, u16_t len, u16_t offset) +{ + const struct pbuf *p; + u16_t left = 0; + u16_t buf_copy_len; + u16_t copied_total = 0; + + LWIP_ERROR("pbuf_copy_partial: invalid buf", (buf != NULL), return 0;); + LWIP_ERROR("pbuf_copy_partial: invalid dataptr", (dataptr != NULL), return 0;); + + /* Note some systems use byte copy if dataptr or one of the pbuf payload pointers are unaligned. */ + for (p = buf; len != 0 && p != NULL; p = p->next) { + if ((offset != 0) && (offset >= p->len)) { + /* don't copy from this buffer -> on to the next */ + offset = (u16_t)(offset - p->len); + } else { + /* copy from this buffer. maybe only partially. */ + buf_copy_len = (u16_t)(p->len - offset); + if (buf_copy_len > len) { + buf_copy_len = len; + } + /* copy the necessary parts of the buffer */ + MEMCPY(&((char *)dataptr)[left], &((char *)p->payload)[offset], buf_copy_len); + copied_total = (u16_t)(copied_total + buf_copy_len); + left = (u16_t)(left + buf_copy_len); + len = (u16_t)(len - buf_copy_len); + offset = 0; + } + } + return copied_total; +} + +/** + * @ingroup pbuf + * Get part of a pbuf's payload as contiguous memory. The returned memory is + * either a pointer into the pbuf's payload or, if split over multiple pbufs, + * a copy into the user-supplied buffer. + * + * @param p the pbuf from which to copy data + * @param buffer the application supplied buffer + * @param bufsize size of the application supplied buffer + * @param len length of data to copy (dataptr must be big enough). No more + * than buf->tot_len will be copied, irrespective of len + * @param offset offset into the packet buffer from where to begin copying len bytes + * @return the number of bytes copied, or 0 on failure + */ +void * +pbuf_get_contiguous(const struct pbuf *p, void *buffer, size_t bufsize, u16_t len, u16_t offset) +{ + const struct pbuf *q; + u16_t out_offset; + + LWIP_ERROR("pbuf_get_contiguous: invalid buf", (p != NULL), return NULL;); + LWIP_ERROR("pbuf_get_contiguous: invalid dataptr", (buffer != NULL), return NULL;); + LWIP_ERROR("pbuf_get_contiguous: invalid dataptr", (bufsize >= len), return NULL;); + + q = pbuf_skip_const(p, offset, &out_offset); + if (q != NULL) { + if (q->len >= (out_offset + len)) { + /* all data in this pbuf, return zero-copy */ + return (u8_t *)q->payload + out_offset; + } + /* need to copy */ + if (pbuf_copy_partial(q, buffer, len, out_offset) != len) { + /* copying failed: pbuf is too short */ + return NULL; + } + return buffer; + } + /* pbuf is too short (offset does not fit in) */ + return NULL; +} + +#if LWIP_TCP && TCP_QUEUE_OOSEQ && LWIP_WND_SCALE +/** + * This method modifies a 'pbuf chain', so that its total length is + * smaller than 64K. The remainder of the original pbuf chain is stored + * in *rest. + * This function never creates new pbufs, but splits an existing chain + * in two parts. The tot_len of the modified packet queue will likely be + * smaller than 64K. + * 'packet queues' are not supported by this function. + * + * @param p the pbuf queue to be split + * @param rest pointer to store the remainder (after the first 64K) + */ +void pbuf_split_64k(struct pbuf *p, struct pbuf **rest) +{ + *rest = NULL; + if ((p != NULL) && (p->next != NULL)) { + u16_t tot_len_front = p->len; + struct pbuf *i = p; + struct pbuf *r = p->next; + + /* continue until the total length (summed up as u16_t) overflows */ + while ((r != NULL) && ((u16_t)(tot_len_front + r->len) >= tot_len_front)) { + tot_len_front = (u16_t)(tot_len_front + r->len); + i = r; + r = r->next; + } + /* i now points to last packet of the first segment. Set next + pointer to NULL */ + i->next = NULL; + + if (r != NULL) { + /* Update the tot_len field in the first part */ + for (i = p; i != NULL; i = i->next) { + i->tot_len = (u16_t)(i->tot_len - r->tot_len); + LWIP_ASSERT("tot_len/len mismatch in last pbuf", + (i->next != NULL) || (i->tot_len == i->len)); + } + if (p->flags & PBUF_FLAG_TCP_FIN) { + r->flags |= PBUF_FLAG_TCP_FIN; + } + + /* tot_len field in rest does not need modifications */ + /* reference counters do not need modifications */ + *rest = r; + } + } +} +#endif /* LWIP_TCP && TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + +/* Actual implementation of pbuf_skip() but returning const pointer... */ +static const struct pbuf * +pbuf_skip_const(const struct pbuf *in, u16_t in_offset, u16_t *out_offset) +{ + u16_t offset_left = in_offset; + const struct pbuf *q = in; + + /* get the correct pbuf */ + while ((q != NULL) && (q->len <= offset_left)) { + offset_left = (u16_t)(offset_left - q->len); + q = q->next; + } + if (out_offset != NULL) { + *out_offset = offset_left; + } + return q; +} + +/** + * @ingroup pbuf + * Skip a number of bytes at the start of a pbuf + * + * @param in input pbuf + * @param in_offset offset to skip + * @param out_offset resulting offset in the returned pbuf + * @return the pbuf in the queue where the offset is or NULL when the offset is too high + */ +struct pbuf * +pbuf_skip(struct pbuf *in, u16_t in_offset, u16_t *out_offset) +{ + const struct pbuf *out = pbuf_skip_const(in, in_offset, out_offset); + return LWIP_CONST_CAST(struct pbuf *, out); +} + +/** + * @ingroup pbuf + * Copy application supplied data into a pbuf. + * This function can only be used to copy the equivalent of buf->tot_len data. + * + * @param buf pbuf to fill with data + * @param dataptr application supplied data buffer + * @param len length of the application supplied data buffer + * + * @return ERR_OK if successful, ERR_MEM if the pbuf is not big enough + */ +err_t +pbuf_take(struct pbuf *buf, const void *dataptr, u16_t len) +{ + struct pbuf *p; + size_t buf_copy_len; + size_t total_copy_len = len; + size_t copied_total = 0; + + LWIP_ERROR("pbuf_take: invalid buf", (buf != NULL), return ERR_ARG;); + LWIP_ERROR("pbuf_take: invalid dataptr", (dataptr != NULL), return ERR_ARG;); + LWIP_ERROR("pbuf_take: buf not large enough", (buf->tot_len >= len), return ERR_MEM;); + + if ((buf == NULL) || (dataptr == NULL) || (buf->tot_len < len)) { + return ERR_ARG; + } + + /* Note some systems use byte copy if dataptr or one of the pbuf payload pointers are unaligned. */ + for (p = buf; total_copy_len != 0; p = p->next) { + LWIP_ASSERT("pbuf_take: invalid pbuf", p != NULL); + buf_copy_len = total_copy_len; + if (buf_copy_len > p->len) { + /* this pbuf cannot hold all remaining data */ + buf_copy_len = p->len; + } + /* copy the necessary parts of the buffer */ + MEMCPY(p->payload, &((const char *)dataptr)[copied_total], buf_copy_len); + total_copy_len -= buf_copy_len; + copied_total += buf_copy_len; + } + LWIP_ASSERT("did not copy all data", total_copy_len == 0 && copied_total == len); + return ERR_OK; +} + +/** + * @ingroup pbuf + * Same as pbuf_take() but puts data at an offset + * + * @param buf pbuf to fill with data + * @param dataptr application supplied data buffer + * @param len length of the application supplied data buffer + * @param offset offset in pbuf where to copy dataptr to + * + * @return ERR_OK if successful, ERR_MEM if the pbuf is not big enough + */ +err_t +pbuf_take_at(struct pbuf *buf, const void *dataptr, u16_t len, u16_t offset) +{ + u16_t target_offset; + struct pbuf *q = pbuf_skip(buf, offset, &target_offset); + + /* return requested data if pbuf is OK */ + if ((q != NULL) && (q->tot_len >= target_offset + len)) { + u16_t remaining_len = len; + const u8_t *src_ptr = (const u8_t *)dataptr; + /* copy the part that goes into the first pbuf */ + u16_t first_copy_len; + LWIP_ASSERT("check pbuf_skip result", target_offset < q->len); + first_copy_len = (u16_t)LWIP_MIN(q->len - target_offset, len); + MEMCPY(((u8_t *)q->payload) + target_offset, dataptr, first_copy_len); + remaining_len = (u16_t)(remaining_len - first_copy_len); + src_ptr += first_copy_len; + if (remaining_len > 0) { + return pbuf_take(q->next, src_ptr, remaining_len); + } + return ERR_OK; + } + return ERR_MEM; +} + +/** + * @ingroup pbuf + * Creates a single pbuf out of a queue of pbufs. + * + * @remark: Either the source pbuf 'p' is freed by this function or the original + * pbuf 'p' is returned, therefore the caller has to check the result! + * + * @param p the source pbuf + * @param layer pbuf_layer of the new pbuf + * + * @return a new, single pbuf (p->next is NULL) + * or the old pbuf if allocation fails + */ +struct pbuf * +pbuf_coalesce(struct pbuf *p, pbuf_layer layer) +{ + struct pbuf *q; + if (p->next == NULL) { + return p; + } + q = pbuf_clone(layer, PBUF_RAM, p); + if (q == NULL) { + /* @todo: what do we do now? */ + return p; + } + pbuf_free(p); + return q; +} + +/** + * @ingroup pbuf + * Allocates a new pbuf of same length (via pbuf_alloc()) and copies the source + * pbuf into this new pbuf (using pbuf_copy()). + * + * @param layer pbuf_layer of the new pbuf + * @param type this parameter decides how and where the pbuf should be allocated + * (@see pbuf_alloc()) + * @param p the source pbuf + * + * @return a new pbuf or NULL if allocation fails + */ +struct pbuf * +pbuf_clone(pbuf_layer layer, pbuf_type type, struct pbuf *p) +{ + struct pbuf *q; + err_t err; + q = pbuf_alloc(layer, p->tot_len, type); + if (q == NULL) { + return NULL; + } + err = pbuf_copy(q, p); + LWIP_UNUSED_ARG(err); /* in case of LWIP_NOASSERT */ + LWIP_ASSERT("pbuf_copy failed", err == ERR_OK); + return q; +} + +#if LWIP_CHECKSUM_ON_COPY +/** + * Copies data into a single pbuf (*not* into a pbuf queue!) and updates + * the checksum while copying + * + * @param p the pbuf to copy data into + * @param start_offset offset of p->payload where to copy the data to + * @param dataptr data to copy into the pbuf + * @param len length of data to copy into the pbuf + * @param chksum pointer to the checksum which is updated + * @return ERR_OK if successful, another error if the data does not fit + * within the (first) pbuf (no pbuf queues!) + */ +err_t +pbuf_fill_chksum(struct pbuf *p, u16_t start_offset, const void *dataptr, + u16_t len, u16_t *chksum) +{ + u32_t acc; + u16_t copy_chksum; + char *dst_ptr; + LWIP_ASSERT("p != NULL", p != NULL); + LWIP_ASSERT("dataptr != NULL", dataptr != NULL); + LWIP_ASSERT("chksum != NULL", chksum != NULL); + LWIP_ASSERT("len != 0", len != 0); + + if ((start_offset >= p->len) || (start_offset + len > p->len)) { + return ERR_ARG; + } + + dst_ptr = ((char *)p->payload) + start_offset; + copy_chksum = LWIP_CHKSUM_COPY(dst_ptr, dataptr, len); + if ((start_offset & 1) != 0) { + copy_chksum = SWAP_BYTES_IN_WORD(copy_chksum); + } + acc = *chksum; + acc += copy_chksum; + *chksum = FOLD_U32T(acc); + return ERR_OK; +} +#endif /* LWIP_CHECKSUM_ON_COPY */ + +/** + * @ingroup pbuf + * Get one byte from the specified position in a pbuf + * WARNING: returns zero for offset >= p->tot_len + * + * @param p pbuf to parse + * @param offset offset into p of the byte to return + * @return byte at an offset into p OR ZERO IF 'offset' >= p->tot_len + */ +u8_t +pbuf_get_at(const struct pbuf *p, u16_t offset) +{ + int ret = pbuf_try_get_at(p, offset); + if (ret >= 0) { + return (u8_t)ret; + } + return 0; +} + +/** + * @ingroup pbuf + * Get one byte from the specified position in a pbuf + * + * @param p pbuf to parse + * @param offset offset into p of the byte to return + * @return byte at an offset into p [0..0xFF] OR negative if 'offset' >= p->tot_len + */ +int +pbuf_try_get_at(const struct pbuf *p, u16_t offset) +{ + u16_t q_idx; + const struct pbuf *q = pbuf_skip_const(p, offset, &q_idx); + + /* return requested data if pbuf is OK */ + if ((q != NULL) && (q->len > q_idx)) { + return ((u8_t *)q->payload)[q_idx]; + } + return -1; +} + +/** + * @ingroup pbuf + * Put one byte to the specified position in a pbuf + * WARNING: silently ignores offset >= p->tot_len + * + * @param p pbuf to fill + * @param offset offset into p of the byte to write + * @param data byte to write at an offset into p + */ +void +pbuf_put_at(struct pbuf *p, u16_t offset, u8_t data) +{ + u16_t q_idx; + struct pbuf *q = pbuf_skip(p, offset, &q_idx); + + /* write requested data if pbuf is OK */ + if ((q != NULL) && (q->len > q_idx)) { + ((u8_t *)q->payload)[q_idx] = data; + } +} + +/** + * @ingroup pbuf + * Compare pbuf contents at specified offset with memory s2, both of length n + * + * @param p pbuf to compare + * @param offset offset into p at which to start comparing + * @param s2 buffer to compare + * @param n length of buffer to compare + * @return zero if equal, nonzero otherwise + * (0xffff if p is too short, diffoffset+1 otherwise) + */ +u16_t +pbuf_memcmp(const struct pbuf *p, u16_t offset, const void *s2, u16_t n) +{ + u16_t start = offset; + const struct pbuf *q = p; + u16_t i; + + /* pbuf long enough to perform check? */ + if (p->tot_len < (offset + n)) { + return 0xffff; + } + + /* get the correct pbuf from chain. We know it succeeds because of p->tot_len check above. */ + while ((q != NULL) && (q->len <= start)) { + start = (u16_t)(start - q->len); + q = q->next; + } + + /* return requested data if pbuf is OK */ + for (i = 0; i < n; i++) { + /* We know pbuf_get_at() succeeds because of p->tot_len check above. */ + u8_t a = pbuf_get_at(q, (u16_t)(start + i)); + u8_t b = ((const u8_t *)s2)[i]; + if (a != b) { + return (u16_t)LWIP_MIN(i + 1, 0xFFFF); + } + } + return 0; +} + +/** + * @ingroup pbuf + * Find occurrence of mem (with length mem_len) in pbuf p, starting at offset + * start_offset. + * + * @param p pbuf to search, maximum length is 0xFFFE since 0xFFFF is used as + * return value 'not found' + * @param mem search for the contents of this buffer + * @param mem_len length of 'mem' + * @param start_offset offset into p at which to start searching + * @return 0xFFFF if substr was not found in p or the index where it was found + */ +u16_t +pbuf_memfind(const struct pbuf *p, const void *mem, u16_t mem_len, u16_t start_offset) +{ + u16_t i; + u16_t max_cmp_start = (u16_t)(p->tot_len - mem_len); + if (p->tot_len >= mem_len + start_offset) { + for (i = start_offset; i <= max_cmp_start; i++) { + u16_t plus = pbuf_memcmp(p, i, mem, mem_len); + if (plus == 0) { + return i; + } + } + } + return 0xFFFF; +} + +/** + * Find occurrence of substr with length substr_len in pbuf p, start at offset + * start_offset + * WARNING: in contrast to strstr(), this one does not stop at the first \0 in + * the pbuf/source string! + * + * @param p pbuf to search, maximum length is 0xFFFE since 0xFFFF is used as + * return value 'not found' + * @param substr string to search for in p, maximum length is 0xFFFE + * @return 0xFFFF if substr was not found in p or the index where it was found + */ +u16_t +pbuf_strstr(const struct pbuf *p, const char *substr) +{ + size_t substr_len; + if ((substr == NULL) || (substr[0] == 0) || (p->tot_len == 0xFFFF)) { + return 0xFFFF; + } + substr_len = strlen(substr); + if (substr_len >= 0xFFFF) { + return 0xFFFF; + } + return pbuf_memfind(p, substr, (u16_t)substr_len, 0); +} diff --git a/lib/lwip/core/raw.c b/lib/lwip/core/raw.c new file mode 100644 index 0000000000..d85aaec051 --- /dev/null +++ b/lib/lwip/core/raw.c @@ -0,0 +1,673 @@ +/** + * @file + * Implementation of raw protocol PCBs for low-level handling of + * different types of protocols besides (or overriding) those + * already available in lwIP.<br> + * See also @ref raw_raw + * + * @defgroup raw_raw RAW + * @ingroup callbackstyle_api + * Implementation of raw protocol PCBs for low-level handling of + * different types of protocols besides (or overriding) those + * already available in lwIP.<br> + * @see @ref api + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/def.h" +#include "lwip/memp.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/raw.h" +#include "lwip/priv/raw_priv.h" +#include "lwip/stats.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/inet_chksum.h" + +#include <string.h> + +/** The list of RAW PCBs */ +static struct raw_pcb *raw_pcbs; + +static u8_t +raw_input_local_match(struct raw_pcb *pcb, u8_t broadcast) +{ + LWIP_UNUSED_ARG(broadcast); /* in IPv6 only case */ + + /* check if PCB is bound to specific netif */ + if ((pcb->netif_idx != NETIF_NO_INDEX) && + (pcb->netif_idx != netif_get_index(ip_data.current_input_netif))) { + return 0; + } + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: PCBs listening to any IP type also listen to any IP address */ + if (IP_IS_ANY_TYPE_VAL(pcb->local_ip)) { +#if IP_SOF_BROADCAST_RECV + if ((broadcast != 0) && !ip_get_option(pcb, SOF_BROADCAST)) { + return 0; + } +#endif /* IP_SOF_BROADCAST_RECV */ + return 1; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + /* Only need to check PCB if incoming IP version matches PCB IP version */ + if (IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ip_current_dest_addr())) { +#if LWIP_IPV4 + /* Special case: IPv4 broadcast: receive all broadcasts + * Note: broadcast variable can only be 1 if it is an IPv4 broadcast */ + if (broadcast != 0) { +#if IP_SOF_BROADCAST_RECV + if (ip_get_option(pcb, SOF_BROADCAST)) +#endif /* IP_SOF_BROADCAST_RECV */ + { + if (ip4_addr_isany(ip_2_ip4(&pcb->local_ip))) { + return 1; + } + } + } else +#endif /* LWIP_IPV4 */ + /* Handle IPv4 and IPv6: catch all or exact match */ + if (ip_addr_isany(&pcb->local_ip) || + ip_addr_eq(&pcb->local_ip, ip_current_dest_addr())) { + return 1; + } + } + + return 0; +} + +/** + * Determine if in incoming IP packet is covered by a RAW PCB + * and if so, pass it to a user-provided receive callback function. + * + * Given an incoming IP datagram (as a chain of pbufs) this function + * finds a corresponding RAW PCB and calls the corresponding receive + * callback function. + * + * @param p pbuf to be demultiplexed to a RAW PCB. + * @param inp network interface on which the datagram was received. + * @return - 1 if the packet has been eaten by a RAW PCB receive + * callback function. The caller MAY NOT not reference the + * packet any longer, and MAY NOT call pbuf_free(). + * @return - 0 if packet is not eaten (pbuf is still referenced by the + * caller). + * + */ +raw_input_state_t +raw_input(struct pbuf *p, struct netif *inp) +{ + struct raw_pcb *pcb, *prev; + s16_t proto; + raw_input_state_t ret = RAW_INPUT_NONE; + u8_t broadcast = ip_addr_isbroadcast(ip_current_dest_addr(), ip_current_netif()); + + LWIP_UNUSED_ARG(inp); + +#if LWIP_IPV6 +#if LWIP_IPV4 + if (IP_HDR_GET_VERSION(p->payload) == 6) +#endif /* LWIP_IPV4 */ + { + struct ip6_hdr *ip6hdr = (struct ip6_hdr *)p->payload; + proto = IP6H_NEXTH(ip6hdr); + } +#if LWIP_IPV4 + else +#endif /* LWIP_IPV4 */ +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 + { + proto = IPH_PROTO((struct ip_hdr *)p->payload); + } +#endif /* LWIP_IPV4 */ + + prev = NULL; + pcb = raw_pcbs; + /* loop through all raw pcbs until the packet is eaten by one */ + /* this allows multiple pcbs to match against the packet by design */ + while (pcb != NULL) { + if ((pcb->protocol == proto) && raw_input_local_match(pcb, broadcast) && + (((pcb->flags & RAW_FLAGS_CONNECTED) == 0) || + ip_addr_eq(&pcb->remote_ip, ip_current_src_addr()))) { + /* receive callback function available? */ + if (pcb->recv != NULL) { + u8_t eaten; +#ifndef LWIP_NOASSERT + void *old_payload = p->payload; +#endif + ret = RAW_INPUT_DELIVERED; + /* the receive callback function did not eat the packet? */ + eaten = pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()); + if (eaten != 0) { + /* receive function ate the packet */ + p = NULL; + if (prev != NULL) { + /* move the pcb to the front of raw_pcbs so that is + found faster next time */ + prev->next = pcb->next; + pcb->next = raw_pcbs; + raw_pcbs = pcb; + } + return RAW_INPUT_EATEN; + } else { + /* sanity-check that the receive callback did not alter the pbuf */ + LWIP_ASSERT("raw pcb recv callback altered pbuf payload pointer without eating packet", + p->payload == old_payload); + } + } + /* no receive callback function was set for this raw PCB */ + } + /* drop the packet */ + prev = pcb; + pcb = pcb->next; + } + return ret; +} + +/** + * @ingroup raw_raw + * Bind a RAW PCB. + * + * @param pcb RAW PCB to be bound with a local address ipaddr. + * @param ipaddr local IP address to bind with. Use IP4_ADDR_ANY to + * bind to all local interfaces. + * + * @return lwIP error code. + * - ERR_OK. Successful. No error occurred. + * - ERR_USE. The specified IP address is already bound to by + * another RAW PCB. + * + * @see raw_disconnect() + */ +err_t +raw_bind(struct raw_pcb *pcb, const ip_addr_t *ipaddr) +{ + LWIP_ASSERT_CORE_LOCKED(); + if ((pcb == NULL) || (ipaddr == NULL)) { + return ERR_VAL; + } + ip_addr_set_ipaddr(&pcb->local_ip, ipaddr); +#if LWIP_IPV6 && LWIP_IPV6_SCOPES + /* If the given IP address should have a zone but doesn't, assign one now. + * This is legacy support: scope-aware callers should always provide properly + * zoned source addresses. */ + if (IP_IS_V6(&pcb->local_ip) && + ip6_addr_lacks_zone(ip_2_ip6(&pcb->local_ip), IP6_UNKNOWN)) { + ip6_addr_select_zone(ip_2_ip6(&pcb->local_ip), ip_2_ip6(&pcb->local_ip)); + } +#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */ + return ERR_OK; +} + +/** + * @ingroup raw_raw + * Bind an RAW PCB to a specific netif. + * After calling this function, all packets received via this PCB + * are guaranteed to have come in via the specified netif, and all + * outgoing packets will go out via the specified netif. + * + * @param pcb RAW PCB to be bound with netif. + * @param netif netif to bind to. Can be NULL. + * + * @see raw_disconnect() + */ +void +raw_bind_netif(struct raw_pcb *pcb, const struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + if (netif != NULL) { + pcb->netif_idx = netif_get_index(netif); + } else { + pcb->netif_idx = NETIF_NO_INDEX; + } +} + +/** + * @ingroup raw_raw + * Connect an RAW PCB. This function is required by upper layers + * of lwip. Using the raw api you could use raw_sendto() instead + * + * This will associate the RAW PCB with the remote address. + * + * @param pcb RAW PCB to be connected with remote address ipaddr and port. + * @param ipaddr remote IP address to connect with. + * + * @return lwIP error code + * + * @see raw_disconnect() and raw_sendto() + */ +err_t +raw_connect(struct raw_pcb *pcb, const ip_addr_t *ipaddr) +{ + LWIP_ASSERT_CORE_LOCKED(); + if ((pcb == NULL) || (ipaddr == NULL)) { + return ERR_VAL; + } + ip_addr_set_ipaddr(&pcb->remote_ip, ipaddr); +#if LWIP_IPV6 && LWIP_IPV6_SCOPES + /* If the given IP address should have a zone but doesn't, assign one now, + * using the bound address to make a more informed decision when possible. */ + if (IP_IS_V6(&pcb->remote_ip) && + ip6_addr_lacks_zone(ip_2_ip6(&pcb->remote_ip), IP6_UNKNOWN)) { + ip6_addr_select_zone(ip_2_ip6(&pcb->remote_ip), ip_2_ip6(&pcb->local_ip)); + } +#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */ + raw_set_flags(pcb, RAW_FLAGS_CONNECTED); + return ERR_OK; +} + +/** + * @ingroup raw_raw + * Disconnect a RAW PCB. + * + * @param pcb the raw pcb to disconnect. + */ +void +raw_disconnect(struct raw_pcb *pcb) +{ + LWIP_ASSERT_CORE_LOCKED(); + /* reset remote address association */ +#if LWIP_IPV4 && LWIP_IPV6 + if (IP_IS_ANY_TYPE_VAL(pcb->local_ip)) { + ip_addr_copy(pcb->remote_ip, *IP_ANY_TYPE); + } else { +#endif + ip_addr_set_any(IP_IS_V6_VAL(pcb->remote_ip), &pcb->remote_ip); +#if LWIP_IPV4 && LWIP_IPV6 + } +#endif + pcb->netif_idx = NETIF_NO_INDEX; + /* mark PCB as unconnected */ + raw_clear_flags(pcb, RAW_FLAGS_CONNECTED); +} + +/** + * @ingroup raw_raw + * Set the callback function for received packets that match the + * raw PCB's protocol and binding. + * + * The callback function MUST either + * - eat the packet by calling pbuf_free() and returning non-zero. The + * packet will not be passed to other raw PCBs or other protocol layers. + * - not free the packet, and return zero. The packet will be matched + * against further PCBs and/or forwarded to another protocol layers. + */ +void +raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg) +{ + LWIP_ASSERT_CORE_LOCKED(); + /* remember recv() callback and user data */ + pcb->recv = recv; + pcb->recv_arg = recv_arg; +} + +/** + * @ingroup raw_raw + * Send the raw IP packet to the given address. An IP header will be prepended + * to the packet, unless the RAW_FLAGS_HDRINCL flag is set on the PCB. In that + * case, the packet must include an IP header, which will then be sent as is. + * + * @param pcb the raw pcb which to send + * @param p the IP payload to send + * @param ipaddr the destination address of the IP packet + * + */ +err_t +raw_sendto(struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *ipaddr) +{ + struct netif *netif; + const ip_addr_t *src_ip; + + if ((pcb == NULL) || (ipaddr == NULL) || !IP_ADDR_PCB_VERSION_MATCH(pcb, ipaddr)) { + return ERR_VAL; + } + + LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n")); + + if (pcb->netif_idx != NETIF_NO_INDEX) { + netif = netif_get_by_index(pcb->netif_idx); + } else { +#if LWIP_MULTICAST_TX_OPTIONS + netif = NULL; + if (ip_addr_ismulticast(ipaddr)) { + /* For multicast-destined packets, use the user-provided interface index to + * determine the outgoing interface, if an interface index is set and a + * matching netif can be found. Otherwise, fall back to regular routing. */ + netif = netif_get_by_index(pcb->mcast_ifindex); + } + + if (netif == NULL) +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + { + netif = ip_route(&pcb->local_ip, ipaddr); + } + } + + if (netif == NULL) { + LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to ")); + ip_addr_debug_print(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ipaddr); + LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("\n")); + return ERR_RTE; + } + + if (ip_addr_isany(&pcb->local_ip) || ip_addr_ismulticast(&pcb->local_ip)) { + /* use outgoing network interface IP address as source address */ + src_ip = ip_netif_get_local_ip(netif, ipaddr); +#if LWIP_IPV6 + if (src_ip == NULL) { + return ERR_RTE; + } +#endif /* LWIP_IPV6 */ + } else { + /* use RAW PCB local IP address as source address */ + src_ip = &pcb->local_ip; + } + + return raw_sendto_if_src(pcb, p, ipaddr, netif, src_ip); +} + +/** + * @ingroup raw_raw + * Send the raw IP packet to the given address, using a particular outgoing + * netif and source IP address. An IP header will be prepended to the packet, + * unless the RAW_FLAGS_HDRINCL flag is set on the PCB. In that case, the + * packet must include an IP header, which will then be sent as is. + * + * @param pcb RAW PCB used to send the data + * @param p chain of pbufs to be sent + * @param dst_ip destination IP address + * @param netif the netif used for sending + * @param src_ip source IP address + */ +err_t +raw_sendto_if_src(struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *dst_ip, + struct netif *netif, const ip_addr_t *src_ip) +{ + err_t err; + struct pbuf *q; /* q will be sent down the stack */ + u16_t header_size; + u8_t ttl; + + LWIP_ASSERT_CORE_LOCKED(); + + if ((pcb == NULL) || (dst_ip == NULL) || (netif == NULL) || (src_ip == NULL) || + !IP_ADDR_PCB_VERSION_MATCH(pcb, src_ip) || !IP_ADDR_PCB_VERSION_MATCH(pcb, dst_ip)) { + return ERR_VAL; + } + + header_size = ( +#if LWIP_IPV4 && LWIP_IPV6 + IP_IS_V6(dst_ip) ? IP6_HLEN : IP_HLEN); +#elif LWIP_IPV4 + IP_HLEN); +#else + IP6_HLEN); +#endif + + /* Handle the HDRINCL option as an exception: none of the code below applies + * to this case, and sending the packet needs to be done differently too. */ + if (pcb->flags & RAW_FLAGS_HDRINCL) { + /* A full header *must* be present in the first pbuf of the chain, as the + * output routines may access its fields directly. */ + if (p->len < header_size) { + return ERR_VAL; + } + /* @todo multicast loop support, if at all desired for this scenario.. */ + NETIF_SET_HINTS(netif, &pcb->netif_hints); + err = ip_output_if_hdrincl(p, src_ip, dst_ip, netif); + NETIF_RESET_HINTS(netif); + return err; + } + + /* packet too large to add an IP header without causing an overflow? */ + if ((u16_t)(p->tot_len + header_size) < p->tot_len) { + return ERR_MEM; + } + /* not enough space to add an IP header to first pbuf in given p chain? */ + if (pbuf_add_header(p, header_size)) { + /* allocate header in new pbuf */ + q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM); + /* new header pbuf could not be allocated? */ + if (q == NULL) { + LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n")); + return ERR_MEM; + } + if (p->tot_len != 0) { + /* chain header q in front of given pbuf p */ + pbuf_chain(q, p); + } + /* { first pbuf q points to header pbuf } */ + LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p)); + } else { + /* first pbuf q equals given pbuf */ + q = p; + if (pbuf_remove_header(q, header_size)) { + LWIP_ASSERT("Can't restore header we just removed!", 0); + return ERR_MEM; + } + } + +#if IP_SOF_BROADCAST + if (IP_IS_V4(dst_ip)) { + /* broadcast filter? */ + if (!ip_get_option(pcb, SOF_BROADCAST) && ip_addr_isbroadcast(dst_ip, netif)) { + LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb)); + /* free any temporary header pbuf allocated by pbuf_header() */ + if (q != p) { + pbuf_free(q); + } + return ERR_VAL; + } + } +#endif /* IP_SOF_BROADCAST */ + + /* Multicast Loop? */ +#if LWIP_MULTICAST_TX_OPTIONS + if (((pcb->flags & RAW_FLAGS_MULTICAST_LOOP) != 0) && ip_addr_ismulticast(dst_ip)) { + q->flags |= PBUF_FLAG_MCASTLOOP; + } +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + +#if LWIP_IPV6 + /* If requested, based on the IPV6_CHECKSUM socket option per RFC3542, + compute the checksum and update the checksum in the payload. */ + if (IP_IS_V6(dst_ip) && pcb->chksum_reqd) { + u16_t chksum = ip6_chksum_pseudo(p, pcb->protocol, p->tot_len, ip_2_ip6(src_ip), ip_2_ip6(dst_ip)); + LWIP_ASSERT("Checksum must fit into first pbuf", p->len >= (pcb->chksum_offset + 2)); + SMEMCPY(((u8_t *)p->payload) + pcb->chksum_offset, &chksum, sizeof(u16_t)); + } +#endif + + /* Determine TTL to use */ +#if LWIP_MULTICAST_TX_OPTIONS + ttl = (ip_addr_ismulticast(dst_ip) ? raw_get_multicast_ttl(pcb) : pcb->ttl); +#else /* LWIP_MULTICAST_TX_OPTIONS */ + ttl = pcb->ttl; +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + + NETIF_SET_HINTS(netif, &pcb->netif_hints); + err = ip_output_if(q, src_ip, dst_ip, ttl, pcb->tos, pcb->protocol, netif); + NETIF_RESET_HINTS(netif); + + /* did we chain a header earlier? */ + if (q != p) { + /* free the header */ + pbuf_free(q); + } + return err; +} + +/** + * @ingroup raw_raw + * Send the raw IP packet to the address given by raw_connect() + * + * @param pcb the raw pcb which to send + * @param p the IP payload to send + * + */ +err_t +raw_send(struct raw_pcb *pcb, struct pbuf *p) +{ + return raw_sendto(pcb, p, &pcb->remote_ip); +} + +/** + * @ingroup raw_raw + * Remove an RAW PCB. + * + * @param pcb RAW PCB to be removed. The PCB is removed from the list of + * RAW PCB's and the data structure is freed from memory. + * + * @see raw_new() + */ +void +raw_remove(struct raw_pcb *pcb) +{ + struct raw_pcb *pcb2; + LWIP_ASSERT_CORE_LOCKED(); + /* pcb to be removed is first in list? */ + if (raw_pcbs == pcb) { + /* make list start at 2nd pcb */ + raw_pcbs = raw_pcbs->next; + /* pcb not 1st in list */ + } else { + for (pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) { + /* find pcb in raw_pcbs list */ + if (pcb2->next != NULL && pcb2->next == pcb) { + /* remove pcb from list */ + pcb2->next = pcb->next; + break; + } + } + } + memp_free(MEMP_RAW_PCB, pcb); +} + +/** + * @ingroup raw_raw + * Create a RAW PCB. + * + * @return The RAW PCB which was created. NULL if the PCB data structure + * could not be allocated. + * + * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP) + * + * @see raw_remove() + */ +struct raw_pcb * +raw_new(u8_t proto) +{ + struct raw_pcb *pcb; + + LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n")); + LWIP_ASSERT_CORE_LOCKED(); + + pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB); + /* could allocate RAW PCB? */ + if (pcb != NULL) { + /* initialize PCB to all zeroes */ + memset(pcb, 0, sizeof(struct raw_pcb)); + pcb->protocol = proto; + pcb->ttl = RAW_TTL; +#if LWIP_MULTICAST_TX_OPTIONS + raw_set_multicast_ttl(pcb, RAW_TTL); +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + pcb_tci_init(pcb); + pcb->next = raw_pcbs; + raw_pcbs = pcb; + } + return pcb; +} + +/** + * @ingroup raw_raw + * Create a RAW PCB for specific IP type. + * + * @return The RAW PCB which was created. NULL if the PCB data structure + * could not be allocated. + * + * @param type IP address type, see @ref lwip_ip_addr_type definitions. + * If you want to listen to IPv4 and IPv6 (dual-stack) packets, + * supply @ref IPADDR_TYPE_ANY as argument and bind to @ref IP_ANY_TYPE. + * @param proto the protocol number (next header) of the IPv6 packet payload + * (e.g. IP6_NEXTH_ICMP6) + * + * @see raw_remove() + */ +struct raw_pcb * +raw_new_ip_type(u8_t type, u8_t proto) +{ + struct raw_pcb *pcb; + LWIP_ASSERT_CORE_LOCKED(); + pcb = raw_new(proto); +#if LWIP_IPV4 && LWIP_IPV6 + if (pcb != NULL) { + IP_SET_TYPE_VAL(pcb->local_ip, type); + IP_SET_TYPE_VAL(pcb->remote_ip, type); + } +#else /* LWIP_IPV4 && LWIP_IPV6 */ + LWIP_UNUSED_ARG(type); +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + return pcb; +} + +/** This function is called from netif.c when address is changed + * + * @param old_addr IP address of the netif before change + * @param new_addr IP address of the netif after change + */ +void raw_netif_ip_addr_changed(const ip_addr_t *old_addr, const ip_addr_t *new_addr) +{ + struct raw_pcb *rpcb; + + if (!ip_addr_isany(old_addr) && !ip_addr_isany(new_addr)) { + for (rpcb = raw_pcbs; rpcb != NULL; rpcb = rpcb->next) { + /* PCB bound to current local interface address? */ + if (ip_addr_eq(&rpcb->local_ip, old_addr)) { + /* The PCB is bound to the old ipaddr and + * is set to bound to the new one instead */ + ip_addr_copy(rpcb->local_ip, *new_addr); + } + } + } +} + +#endif /* LWIP_RAW */ diff --git a/lib/lwip/core/stats.c b/lib/lwip/core/stats.c new file mode 100644 index 0000000000..95445ec955 --- /dev/null +++ b/lib/lwip/core/stats.c @@ -0,0 +1,168 @@ +/** + * @file + * Statistics module + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_STATS /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/def.h" +#include "lwip/stats.h" +#include "lwip/mem.h" +#include "lwip/debug.h" + +#include <string.h> + +struct stats_ lwip_stats; + +void +stats_init(void) +{ +#ifdef LWIP_DEBUG +#if MEM_STATS + lwip_stats.mem.name = "MEM"; +#endif /* MEM_STATS */ +#endif /* LWIP_DEBUG */ +} + +#if LWIP_STATS_DISPLAY +void +stats_display_proto(struct stats_proto *proto, const char *name) +{ + LWIP_PLATFORM_DIAG(("\n%s\n\t", name)); + LWIP_PLATFORM_DIAG(("xmit: %"STAT_COUNTER_F"\n\t", proto->xmit)); + LWIP_PLATFORM_DIAG(("recv: %"STAT_COUNTER_F"\n\t", proto->recv)); + LWIP_PLATFORM_DIAG(("fw: %"STAT_COUNTER_F"\n\t", proto->fw)); + LWIP_PLATFORM_DIAG(("drop: %"STAT_COUNTER_F"\n\t", proto->drop)); + LWIP_PLATFORM_DIAG(("chkerr: %"STAT_COUNTER_F"\n\t", proto->chkerr)); + LWIP_PLATFORM_DIAG(("lenerr: %"STAT_COUNTER_F"\n\t", proto->lenerr)); + LWIP_PLATFORM_DIAG(("memerr: %"STAT_COUNTER_F"\n\t", proto->memerr)); + LWIP_PLATFORM_DIAG(("rterr: %"STAT_COUNTER_F"\n\t", proto->rterr)); + LWIP_PLATFORM_DIAG(("proterr: %"STAT_COUNTER_F"\n\t", proto->proterr)); + LWIP_PLATFORM_DIAG(("opterr: %"STAT_COUNTER_F"\n\t", proto->opterr)); + LWIP_PLATFORM_DIAG(("err: %"STAT_COUNTER_F"\n\t", proto->err)); + LWIP_PLATFORM_DIAG(("cachehit: %"STAT_COUNTER_F"\n", proto->cachehit)); +} + +#if IGMP_STATS || MLD6_STATS +void +stats_display_igmp(struct stats_igmp *igmp, const char *name) +{ + LWIP_PLATFORM_DIAG(("\n%s\n\t", name)); + LWIP_PLATFORM_DIAG(("xmit: %"STAT_COUNTER_F"\n\t", igmp->xmit)); + LWIP_PLATFORM_DIAG(("recv: %"STAT_COUNTER_F"\n\t", igmp->recv)); + LWIP_PLATFORM_DIAG(("drop: %"STAT_COUNTER_F"\n\t", igmp->drop)); + LWIP_PLATFORM_DIAG(("chkerr: %"STAT_COUNTER_F"\n\t", igmp->chkerr)); + LWIP_PLATFORM_DIAG(("lenerr: %"STAT_COUNTER_F"\n\t", igmp->lenerr)); + LWIP_PLATFORM_DIAG(("memerr: %"STAT_COUNTER_F"\n\t", igmp->memerr)); + LWIP_PLATFORM_DIAG(("proterr: %"STAT_COUNTER_F"\n\t", igmp->proterr)); + LWIP_PLATFORM_DIAG(("rx_v1: %"STAT_COUNTER_F"\n\t", igmp->rx_v1)); + LWIP_PLATFORM_DIAG(("rx_group: %"STAT_COUNTER_F"\n\t", igmp->rx_group)); + LWIP_PLATFORM_DIAG(("rx_general: %"STAT_COUNTER_F"\n\t", igmp->rx_general)); + LWIP_PLATFORM_DIAG(("rx_report: %"STAT_COUNTER_F"\n\t", igmp->rx_report)); + LWIP_PLATFORM_DIAG(("tx_join: %"STAT_COUNTER_F"\n\t", igmp->tx_join)); + LWIP_PLATFORM_DIAG(("tx_leave: %"STAT_COUNTER_F"\n\t", igmp->tx_leave)); + LWIP_PLATFORM_DIAG(("tx_report: %"STAT_COUNTER_F"\n", igmp->tx_report)); +} +#endif /* IGMP_STATS || MLD6_STATS */ + +#if MEM_STATS || MEMP_STATS +void +stats_display_mem(struct stats_mem *mem, const char *name) +{ + LWIP_PLATFORM_DIAG(("\nMEM %s\n\t", name)); + LWIP_PLATFORM_DIAG(("avail: %"MEM_SIZE_F"\n\t", mem->avail)); + LWIP_PLATFORM_DIAG(("used: %"MEM_SIZE_F"\n\t", mem->used)); + LWIP_PLATFORM_DIAG(("max: %"MEM_SIZE_F"\n\t", mem->max)); + LWIP_PLATFORM_DIAG(("err: %"STAT_COUNTER_F"\n", mem->err)); +} + +#if MEMP_STATS +void +stats_display_memp(struct stats_mem *mem, int idx) +{ + if (idx < MEMP_MAX) { + stats_display_mem(mem, mem->name); + } +} +#endif /* MEMP_STATS */ +#endif /* MEM_STATS || MEMP_STATS */ + +#if SYS_STATS +void +stats_display_sys(struct stats_sys *sys) +{ + LWIP_PLATFORM_DIAG(("\nSYS\n\t")); + LWIP_PLATFORM_DIAG(("sem.used: %"STAT_COUNTER_F"\n\t", sys->sem.used)); + LWIP_PLATFORM_DIAG(("sem.max: %"STAT_COUNTER_F"\n\t", sys->sem.max)); + LWIP_PLATFORM_DIAG(("sem.err: %"STAT_COUNTER_F"\n\t", sys->sem.err)); + LWIP_PLATFORM_DIAG(("mutex.used: %"STAT_COUNTER_F"\n\t", sys->mutex.used)); + LWIP_PLATFORM_DIAG(("mutex.max: %"STAT_COUNTER_F"\n\t", sys->mutex.max)); + LWIP_PLATFORM_DIAG(("mutex.err: %"STAT_COUNTER_F"\n\t", sys->mutex.err)); + LWIP_PLATFORM_DIAG(("mbox.used: %"STAT_COUNTER_F"\n\t", sys->mbox.used)); + LWIP_PLATFORM_DIAG(("mbox.max: %"STAT_COUNTER_F"\n\t", sys->mbox.max)); + LWIP_PLATFORM_DIAG(("mbox.err: %"STAT_COUNTER_F"\n", sys->mbox.err)); +} +#endif /* SYS_STATS */ + +void +stats_display(void) +{ + s16_t i; + + LINK_STATS_DISPLAY(); + ETHARP_STATS_DISPLAY(); + IPFRAG_STATS_DISPLAY(); + IP6_FRAG_STATS_DISPLAY(); + IP_STATS_DISPLAY(); + ND6_STATS_DISPLAY(); + IP6_STATS_DISPLAY(); + IGMP_STATS_DISPLAY(); + MLD6_STATS_DISPLAY(); + ICMP_STATS_DISPLAY(); + ICMP6_STATS_DISPLAY(); + UDP_STATS_DISPLAY(); + TCP_STATS_DISPLAY(); + MEM_STATS_DISPLAY(); + for (i = 0; i < MEMP_MAX; i++) { + MEMP_STATS_DISPLAY(i); + } + SYS_STATS_DISPLAY(); +} +#endif /* LWIP_STATS_DISPLAY */ + +#endif /* LWIP_STATS */ diff --git a/lib/lwip/core/sys.c b/lib/lwip/core/sys.c new file mode 100644 index 0000000000..69d7197a1f --- /dev/null +++ b/lib/lwip/core/sys.c @@ -0,0 +1,148 @@ +/** + * @file + * lwIP Operating System abstraction + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +/** + * @defgroup sys_layer Porting (system abstraction layer) + * @ingroup lwip + * + * @defgroup sys_os OS abstraction layer + * @ingroup sys_layer + * No need to implement functions in this section in NO_SYS mode. + * The OS-specific code should be implemented in arch/sys_arch.h + * and sys_arch.c of your port. + * + * The operating system emulation layer provides a common interface + * between the lwIP code and the underlying operating system kernel. The + * general idea is that porting lwIP to new architectures requires only + * small changes to a few header files and a new sys_arch + * implementation. It is also possible to do a sys_arch implementation + * that does not rely on any underlying operating system. + * + * The sys_arch provides semaphores, mailboxes and mutexes to lwIP. For the full + * lwIP functionality, multiple threads support can be implemented in the + * sys_arch, but this is not required for the basic lwIP + * functionality. Timer scheduling is implemented in lwIP, but can be implemented + * by the sys_arch port (LWIP_TIMERS_CUSTOM==1). + * + * In addition to the source file providing the functionality of sys_arch, + * the OS emulation layer must provide several header files defining + * macros used throughout lwip. The files required and the macros they + * must define are listed below the sys_arch description. + * + * Since lwIP 1.4.0, semaphore, mutexes and mailbox functions are prototyped in a way that + * allows both using pointers or actual OS structures to be used. This way, memory + * required for such types can be either allocated in place (globally or on the + * stack) or on the heap (allocated internally in the "*_new()" functions). + * + * Note: + * ----- + * Be careful with using mem_malloc() in sys_arch. When malloc() refers to + * mem_malloc() you can run into a circular function call problem. In mem.c + * mem_init() tries to allocate a semaphore using mem_malloc, which of course + * can't be performed when sys_arch uses mem_malloc. + * + * @defgroup sys_sem Semaphores + * @ingroup sys_os + * Semaphores can be either counting or binary - lwIP works with both + * kinds. + * Semaphores are represented by the type "sys_sem_t" which is typedef'd + * in the sys_arch.h file. Mailboxes are equivalently represented by the + * type "sys_mbox_t". Mutexes are represented by the type "sys_mutex_t". + * lwIP does not place any restrictions on how these types are represented + * internally. + * + * @defgroup sys_mutex Mutexes + * @ingroup sys_os + * Mutexes are recommended to correctly handle priority inversion, + * especially if you use LWIP_CORE_LOCKING . + * + * @defgroup sys_mbox Mailboxes + * @ingroup sys_os + * Mailboxes should be implemented as a queue which allows multiple messages + * to be posted (implementing as a rendez-vous point where only one message can be + * posted at a time can have a highly negative impact on performance). A message + * in a mailbox is just a pointer, nothing more. + * + * @defgroup sys_time Time + * @ingroup sys_layer + * + * @defgroup sys_prot Critical sections + * @ingroup sys_layer + * Used to protect short regions of code against concurrent access. + * - Your system is a bare-metal system (probably with an RTOS) + * and interrupts are under your control: + * Implement this as LockInterrupts() / UnlockInterrupts() + * - Your system uses an RTOS with deferred interrupt handling from a + * worker thread: Implement as a global mutex or lock/unlock scheduler + * - Your system uses a high-level OS with e.g. POSIX signals: + * Implement as a global mutex + * + * @defgroup sys_misc Misc + * @ingroup sys_os + */ + +#include "lwip/opt.h" + +#include "lwip/sys.h" + +/* Most of the functions defined in sys.h must be implemented in the + * architecture-dependent file sys_arch.c */ + +#if !NO_SYS + +#ifndef sys_msleep +/** + * Sleep for some ms. Timeouts are NOT processed while sleeping. + * + * @param ms number of milliseconds to sleep + */ +void +sys_msleep(u32_t ms) +{ + if (ms > 0) { + sys_sem_t delaysem; + err_t err = sys_sem_new(&delaysem, 0); + if (err == ERR_OK) { + sys_arch_sem_wait(&delaysem, ms); + sys_sem_free(&delaysem); + } + } +} +#endif /* sys_msleep */ + +#endif /* !NO_SYS */ diff --git a/lib/lwip/core/tcp.c b/lib/lwip/core/tcp.c new file mode 100644 index 0000000000..ea95ffeef8 --- /dev/null +++ b/lib/lwip/core/tcp.c @@ -0,0 +1,2696 @@ +/** + * @file + * Transmission Control Protocol for IP + * See also @ref tcp_raw + * + * @defgroup tcp_raw TCP + * @ingroup callbackstyle_api + * Transmission Control Protocol for IP<br> + * @see @ref api + * + * Common functions for the TCP implementation, such as functions + * for manipulating the data structures and the TCP timer functions. TCP functions + * related to input and output is found in tcp_in.c and tcp_out.c respectively.<br> + * + * TCP connection setup + * -------------------- + * The functions used for setting up connections is similar to that of + * the sequential API and of the BSD socket API. A new TCP connection + * identifier (i.e., a protocol control block - PCB) is created with the + * tcp_new() function. This PCB can then be either set to listen for new + * incoming connections or be explicitly connected to another host. + * - tcp_new() + * - tcp_bind() + * - tcp_listen() and tcp_listen_with_backlog() + * - tcp_accept() + * - tcp_connect() + * + * Sending TCP data + * ---------------- + * TCP data is sent by enqueueing the data with a call to tcp_write() and + * triggering to send by calling tcp_output(). When the data is successfully + * transmitted to the remote host, the application will be notified with a + * call to a specified callback function. + * - tcp_write() + * - tcp_output() + * - tcp_sent() + * + * Receiving TCP data + * ------------------ + * TCP data reception is callback based - an application specified + * callback function is called when new data arrives. When the + * application has taken the data, it has to call the tcp_recved() + * function to indicate that TCP can advertise increase the receive + * window. + * - tcp_recv() + * - tcp_recved() + * + * Application polling + * ------------------- + * When a connection is idle (i.e., no data is either transmitted or + * received), lwIP will repeatedly poll the application by calling a + * specified callback function. This can be used either as a watchdog + * timer for killing connections that have stayed idle for too long, or + * as a method of waiting for memory to become available. For instance, + * if a call to tcp_write() has failed because memory wasn't available, + * the application may use the polling functionality to call tcp_write() + * again when the connection has been idle for a while. + * - tcp_poll() + * + * Closing and aborting connections + * -------------------------------- + * - tcp_close() + * - tcp_abort() + * - tcp_err() + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/tcp.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/debug.h" +#include "lwip/stats.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/nd6.h" + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +#ifndef TCP_LOCAL_PORT_RANGE_START +/* From http://www.iana.org/assignments/port-numbers: + "The Dynamic and/or Private Ports are those from 49152 through 65535" */ +#define TCP_LOCAL_PORT_RANGE_START 0xc000 +#define TCP_LOCAL_PORT_RANGE_END 0xffff +#define TCP_ENSURE_LOCAL_PORT_RANGE(port) ((u16_t)(((port) & (u16_t)~TCP_LOCAL_PORT_RANGE_START) + TCP_LOCAL_PORT_RANGE_START)) +#endif + +#if LWIP_TCP_KEEPALIVE +#define TCP_KEEP_DUR(pcb) ((pcb)->keep_cnt * (pcb)->keep_intvl) +#define TCP_KEEP_INTVL(pcb) ((pcb)->keep_intvl) +#else /* LWIP_TCP_KEEPALIVE */ +#define TCP_KEEP_DUR(pcb) TCP_MAXIDLE +#define TCP_KEEP_INTVL(pcb) TCP_KEEPINTVL_DEFAULT +#endif /* LWIP_TCP_KEEPALIVE */ + +/* As initial send MSS, we use TCP_MSS but limit it to 536. */ +#if TCP_MSS > 536 +#define INITIAL_MSS 536 +#else +#define INITIAL_MSS TCP_MSS +#endif + +static const char *const tcp_state_str[] = { + "CLOSED", + "LISTEN", + "SYN_SENT", + "SYN_RCVD", + "ESTABLISHED", + "FIN_WAIT_1", + "FIN_WAIT_2", + "CLOSE_WAIT", + "CLOSING", + "LAST_ACK", + "TIME_WAIT" +}; + +/* last local TCP port */ +static u16_t tcp_port = TCP_LOCAL_PORT_RANGE_START; + +/* Incremented every coarse grained timer shot (typically every 500 ms). */ +u32_t tcp_ticks; +static const u8_t tcp_backoff[13] = +{ 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7}; +/* Times per slowtmr hits */ +static const u8_t tcp_persist_backoff[7] = { 3, 6, 12, 24, 48, 96, 120 }; + +/* The TCP PCB lists. */ + +/** List of all TCP PCBs bound but not yet (connected || listening) */ +struct tcp_pcb *tcp_bound_pcbs; +/** List of all TCP PCBs in LISTEN state */ +union tcp_listen_pcbs_t tcp_listen_pcbs; +/** List of all TCP PCBs that are in a state in which + * they accept or send data. */ +struct tcp_pcb *tcp_active_pcbs; +/** List of all TCP PCBs in TIME-WAIT state */ +struct tcp_pcb *tcp_tw_pcbs; + +/** An array with all (non-temporary) PCB lists, mainly used for smaller code size */ +struct tcp_pcb **const tcp_pcb_lists[] = {&tcp_listen_pcbs.pcbs, &tcp_bound_pcbs, + &tcp_active_pcbs, &tcp_tw_pcbs +}; + +u8_t tcp_active_pcbs_changed; + +/** Timer counter to handle calling slow-timer from tcp_tmr() */ +static u8_t tcp_timer; +static u8_t tcp_timer_ctr; +static u16_t tcp_new_port(void); + +static err_t tcp_close_shutdown_fin(struct tcp_pcb *pcb); +#if LWIP_TCP_PCB_NUM_EXT_ARGS +static void tcp_ext_arg_invoke_callbacks_destroyed(struct tcp_pcb_ext_args *ext_args); +#endif + +/** + * Initialize this module. + */ +void +tcp_init(void) +{ +#ifdef LWIP_RAND + tcp_port = TCP_ENSURE_LOCAL_PORT_RANGE(LWIP_RAND()); +#endif /* LWIP_RAND */ +} + +/** Free a tcp pcb */ +void +tcp_free(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("tcp_free: LISTEN", pcb->state != LISTEN); +#if LWIP_TCP_PCB_NUM_EXT_ARGS + tcp_ext_arg_invoke_callbacks_destroyed(pcb->ext_args); +#endif + memp_free(MEMP_TCP_PCB, pcb); +} + +/** Free a tcp listen pcb */ +static void +tcp_free_listen(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("tcp_free_listen: !LISTEN", pcb->state != LISTEN); +#if LWIP_TCP_PCB_NUM_EXT_ARGS + tcp_ext_arg_invoke_callbacks_destroyed(pcb->ext_args); +#endif + memp_free(MEMP_TCP_PCB_LISTEN, pcb); +} + +/** + * Called periodically to dispatch TCP timers. + */ +void +tcp_tmr(void) +{ + /* Call tcp_fasttmr() every 250 ms */ + tcp_fasttmr(); + + if (++tcp_timer & 1) { + /* Call tcp_slowtmr() every 500 ms, i.e., every other timer + tcp_tmr() is called. */ + tcp_slowtmr(); + } +} + +#if LWIP_CALLBACK_API || TCP_LISTEN_BACKLOG +/** Called when a listen pcb is closed. Iterates one pcb list and removes the + * closed listener pcb from pcb->listener if matching. + */ +static void +tcp_remove_listener(struct tcp_pcb *list, struct tcp_pcb_listen *lpcb) +{ + struct tcp_pcb *pcb; + + LWIP_ASSERT("tcp_remove_listener: invalid listener", lpcb != NULL); + + for (pcb = list; pcb != NULL; pcb = pcb->next) { + if (pcb->listener == lpcb) { + pcb->listener = NULL; + } + } +} +#endif + +/** Called when a listen pcb is closed. Iterates all pcb lists and removes the + * closed listener pcb from pcb->listener if matching. + */ +static void +tcp_listen_closed(struct tcp_pcb *pcb) +{ +#if LWIP_CALLBACK_API || TCP_LISTEN_BACKLOG + size_t i; + LWIP_ASSERT("pcb != NULL", pcb != NULL); + LWIP_ASSERT("pcb->state == LISTEN", pcb->state == LISTEN); + for (i = 1; i < LWIP_ARRAYSIZE(tcp_pcb_lists); i++) { + tcp_remove_listener(*tcp_pcb_lists[i], (struct tcp_pcb_listen *)pcb); + } +#endif + LWIP_UNUSED_ARG(pcb); +} + +#if TCP_LISTEN_BACKLOG +/** @ingroup tcp_raw + * Delay accepting a connection in respect to the listen backlog: + * the number of outstanding connections is increased until + * tcp_backlog_accepted() is called. + * + * ATTENTION: the caller is responsible for calling tcp_backlog_accepted() + * or else the backlog feature will get out of sync! + * + * @param pcb the connection pcb which is not fully accepted yet + */ +void +tcp_backlog_delayed(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("pcb != NULL", pcb != NULL); + LWIP_ASSERT_CORE_LOCKED(); + if ((pcb->flags & TF_BACKLOGPEND) == 0) { + if (pcb->listener != NULL) { + pcb->listener->accepts_pending++; + LWIP_ASSERT("accepts_pending != 0", pcb->listener->accepts_pending != 0); + tcp_set_flags(pcb, TF_BACKLOGPEND); + } + } +} + +/** @ingroup tcp_raw + * A delayed-accept a connection is accepted (or closed/aborted): decreases + * the number of outstanding connections after calling tcp_backlog_delayed(). + * + * ATTENTION: the caller is responsible for calling tcp_backlog_accepted() + * or else the backlog feature will get out of sync! + * + * @param pcb the connection pcb which is now fully accepted (or closed/aborted) + */ +void +tcp_backlog_accepted(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("pcb != NULL", pcb != NULL); + LWIP_ASSERT_CORE_LOCKED(); + if ((pcb->flags & TF_BACKLOGPEND) != 0) { + if (pcb->listener != NULL) { + LWIP_ASSERT("accepts_pending != 0", pcb->listener->accepts_pending != 0); + pcb->listener->accepts_pending--; + tcp_clear_flags(pcb, TF_BACKLOGPEND); + } + } +} +#endif /* TCP_LISTEN_BACKLOG */ + +/** + * Closes the TX side of a connection held by the PCB. + * For tcp_close(), a RST is sent if the application didn't receive all data + * (tcp_recved() not called for all data passed to recv callback). + * + * Listening pcbs are freed and may not be referenced any more. + * Connection pcbs are freed if not yet connected and may not be referenced + * any more. If a connection is established (at least SYN received or in + * a closing state), the connection is closed, and put in a closing state. + * The pcb is then automatically freed in tcp_slowtmr(). It is therefore + * unsafe to reference it. + * + * @param pcb the tcp_pcb to close + * @return ERR_OK if connection has been closed + * another err_t if closing failed and pcb is not freed + */ +static err_t +tcp_close_shutdown(struct tcp_pcb *pcb, u8_t rst_on_unacked_data) +{ + LWIP_ASSERT("tcp_close_shutdown: invalid pcb", pcb != NULL); + + if (rst_on_unacked_data && ((pcb->state == ESTABLISHED) || (pcb->state == CLOSE_WAIT))) { + if ((pcb->refused_data != NULL) || (pcb->rcv_wnd != TCP_WND_MAX(pcb))) { + /* Not all data received by application, send RST to tell the remote + side about this. */ + LWIP_ASSERT("pcb->flags & TF_RXCLOSED", pcb->flags & TF_RXCLOSED); + + /* don't call tcp_abort here: we must not deallocate the pcb since + that might not be expected when calling tcp_close */ + tcp_rst(pcb, pcb->snd_nxt, pcb->rcv_nxt, &pcb->local_ip, &pcb->remote_ip, + pcb->local_port, pcb->remote_port); + + tcp_pcb_purge(pcb); + TCP_RMV_ACTIVE(pcb); + /* Deallocate the pcb since we already sent a RST for it */ + if (tcp_input_pcb == pcb) { + /* prevent using a deallocated pcb: free it from tcp_input later */ + tcp_trigger_input_pcb_close(); + } else { + tcp_free(pcb); + } + return ERR_OK; + } + } + + /* - states which free the pcb are handled here, + - states which send FIN and change state are handled in tcp_close_shutdown_fin() */ + switch (pcb->state) { + case CLOSED: + /* Closing a pcb in the CLOSED state might seem erroneous, + * however, it is in this state once allocated and as yet unused + * and the user needs some way to free it should the need arise. + * Calling tcp_close() with a pcb that has already been closed, (i.e. twice) + * or for a pcb that has been used and then entered the CLOSED state + * is erroneous, but this should never happen as the pcb has in those cases + * been freed, and so any remaining handles are bogus. */ + if (pcb->local_port != 0) { + TCP_RMV(&tcp_bound_pcbs, pcb); + } + tcp_free(pcb); + break; + case LISTEN: + tcp_listen_closed(pcb); + tcp_pcb_remove(&tcp_listen_pcbs.pcbs, pcb); + tcp_free_listen(pcb); + break; + case SYN_SENT: + TCP_PCB_REMOVE_ACTIVE(pcb); + tcp_free(pcb); + MIB2_STATS_INC(mib2.tcpattemptfails); + break; + default: + return tcp_close_shutdown_fin(pcb); + } + return ERR_OK; +} + +static err_t +tcp_close_shutdown_fin(struct tcp_pcb *pcb) +{ + err_t err; + LWIP_ASSERT("pcb != NULL", pcb != NULL); + + switch (pcb->state) { + case SYN_RCVD: + err = tcp_send_fin(pcb); + if (err == ERR_OK) { + tcp_backlog_accepted(pcb); + MIB2_STATS_INC(mib2.tcpattemptfails); + pcb->state = FIN_WAIT_1; + } + break; + case ESTABLISHED: + err = tcp_send_fin(pcb); + if (err == ERR_OK) { + MIB2_STATS_INC(mib2.tcpestabresets); + pcb->state = FIN_WAIT_1; + } + break; + case CLOSE_WAIT: + err = tcp_send_fin(pcb); + if (err == ERR_OK) { + MIB2_STATS_INC(mib2.tcpestabresets); + pcb->state = LAST_ACK; + } + break; + default: + /* Has already been closed, do nothing. */ + return ERR_OK; + } + + if (err == ERR_OK) { + /* To ensure all data has been sent when tcp_close returns, we have + to make sure tcp_output doesn't fail. + Since we don't really have to ensure all data has been sent when tcp_close + returns (unsent data is sent from tcp timer functions, also), we don't care + for the return value of tcp_output for now. */ + tcp_output(pcb); + } else if (err == ERR_MEM) { + /* Mark this pcb for closing. Closing is retried from tcp_tmr. */ + tcp_set_flags(pcb, TF_CLOSEPEND); + /* We have to return ERR_OK from here to indicate to the callers that this + pcb should not be used any more as it will be freed soon via tcp_tmr. + This is OK here since sending FIN does not guarantee a time frime for + actually freeing the pcb, either (it is left in closure states for + remote ACK or timeout) */ + return ERR_OK; + } + return err; +} + +/** + * @ingroup tcp_raw + * Closes the connection held by the PCB. + * + * Listening pcbs are freed and may not be referenced any more. + * Connection pcbs are freed if not yet connected and may not be referenced + * any more. If a connection is established (at least SYN received or in + * a closing state), the connection is closed, and put in a closing state. + * The pcb is then automatically freed in tcp_slowtmr(). It is therefore + * unsafe to reference it (unless an error is returned). + * + * The function may return ERR_MEM if no memory + * was available for closing the connection. If so, the application + * should wait and try again either by using the acknowledgment + * callback or the polling functionality. If the close succeeds, the + * function returns ERR_OK. + * + * @param pcb the tcp_pcb to close + * @return ERR_OK if connection has been closed + * another err_t if closing failed and pcb is not freed + */ +err_t +tcp_close(struct tcp_pcb *pcb) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("tcp_close: invalid pcb", pcb != NULL, return ERR_ARG); + LWIP_DEBUGF(TCP_DEBUG, ("tcp_close: closing in ")); + + tcp_debug_print_state(pcb->state); + + if (pcb->state != LISTEN) { + /* Set a flag not to receive any more data... */ + tcp_set_flags(pcb, TF_RXCLOSED); + } + /* ... and close */ + return tcp_close_shutdown(pcb, 1); +} + +/** + * @ingroup tcp_raw + * Causes all or part of a full-duplex connection of this PCB to be shut down. + * This doesn't deallocate the PCB unless shutting down both sides! + * Shutting down both sides is the same as calling tcp_close, so if it succeeds + * (i.e. returns ER_OK), the PCB must not be referenced any more! + * + * @param pcb PCB to shutdown + * @param shut_rx shut down receive side if this is != 0 + * @param shut_tx shut down send side if this is != 0 + * @return ERR_OK if shutdown succeeded (or the PCB has already been shut down) + * another err_t on error. + */ +err_t +tcp_shutdown(struct tcp_pcb *pcb, int shut_rx, int shut_tx) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("tcp_shutdown: invalid pcb", pcb != NULL, return ERR_ARG); + + if (pcb->state == LISTEN) { + return ERR_CONN; + } + if (shut_rx) { + /* shut down the receive side: set a flag not to receive any more data... */ + tcp_set_flags(pcb, TF_RXCLOSED); + if (shut_tx) { + /* shutting down the tx AND rx side is the same as closing for the raw API */ + return tcp_close_shutdown(pcb, 1); + } + /* ... and free buffered data */ + if (pcb->refused_data != NULL) { + pbuf_free(pcb->refused_data); + pcb->refused_data = NULL; + } + } + if (shut_tx) { + /* This can't happen twice since if it succeeds, the pcb's state is changed. + Only close in these states as the others directly deallocate the PCB */ + switch (pcb->state) { + case SYN_RCVD: + case ESTABLISHED: + case CLOSE_WAIT: + return tcp_close_shutdown(pcb, (u8_t)shut_rx); + default: + /* Not (yet?) connected, cannot shutdown the TX side as that would bring us + into CLOSED state, where the PCB is deallocated. */ + return ERR_CONN; + } + } + return ERR_OK; +} + +/** + * Abandons a connection and optionally sends a RST to the remote + * host. Deletes the local protocol control block. This is done when + * a connection is killed because of shortage of memory. + * + * @param pcb the tcp_pcb to abort + * @param reset boolean to indicate whether a reset should be sent + */ +void +tcp_abandon(struct tcp_pcb *pcb, int reset) +{ + u32_t seqno, ackno; +#if LWIP_CALLBACK_API + tcp_err_fn errf; +#endif /* LWIP_CALLBACK_API */ + void *errf_arg; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("tcp_abandon: invalid pcb", pcb != NULL, return); + + /* pcb->state LISTEN not allowed here */ + LWIP_ASSERT("don't call tcp_abort/tcp_abandon for listen-pcbs", + pcb->state != LISTEN); + /* Figure out on which TCP PCB list we are, and remove us. If we + are in an active state, call the receive function associated with + the PCB with a NULL argument, and send an RST to the remote end. */ + if (pcb->state == TIME_WAIT) { + tcp_pcb_remove(&tcp_tw_pcbs, pcb); + tcp_free(pcb); + } else { + int send_rst = 0; + u16_t local_port = 0; + enum tcp_state last_state; + seqno = pcb->snd_nxt; + ackno = pcb->rcv_nxt; +#if LWIP_CALLBACK_API + errf = pcb->errf; +#endif /* LWIP_CALLBACK_API */ + errf_arg = pcb->callback_arg; + if (pcb->state == CLOSED) { + if (pcb->local_port != 0) { + /* bound, not yet opened */ + TCP_RMV(&tcp_bound_pcbs, pcb); + } + } else { + send_rst = reset; + local_port = pcb->local_port; + TCP_PCB_REMOVE_ACTIVE(pcb); + } + if (pcb->unacked != NULL) { + tcp_segs_free(pcb->unacked); + } + if (pcb->unsent != NULL) { + tcp_segs_free(pcb->unsent); + } +#if TCP_QUEUE_OOSEQ + if (pcb->ooseq != NULL) { + tcp_segs_free(pcb->ooseq); + } +#endif /* TCP_QUEUE_OOSEQ */ + tcp_backlog_accepted(pcb); + if (send_rst) { + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_abandon: sending RST\n")); + tcp_rst(pcb, seqno, ackno, &pcb->local_ip, &pcb->remote_ip, local_port, pcb->remote_port); + } + last_state = pcb->state; + tcp_free(pcb); + TCP_EVENT_ERR(last_state, errf, errf_arg, ERR_ABRT); + } +} + +/** + * @ingroup tcp_raw + * Aborts the connection by sending a RST (reset) segment to the remote + * host. The pcb is deallocated. This function never fails. + * + * ATTENTION: When calling this from one of the TCP callbacks, make + * sure you always return ERR_ABRT (and never return ERR_ABRT otherwise + * or you will risk accessing deallocated memory or memory leaks! + * + * @param pcb the tcp pcb to abort + */ +void +tcp_abort(struct tcp_pcb *pcb) +{ + tcp_abandon(pcb, 1); +} + +/** + * @ingroup tcp_raw + * Binds the connection to a local port number and IP address. If the + * IP address is not given (i.e., ipaddr == IP_ANY_TYPE), the connection is + * bound to all local IP addresses. + * If another connection is bound to the same port, the function will + * return ERR_USE, otherwise ERR_OK is returned. + * @see MEMP_NUM_TCP_PCB_LISTEN and MEMP_NUM_TCP_PCB + * + * @param pcb the tcp_pcb to bind (no check is done whether this pcb is + * already bound!) + * @param ipaddr the local ip address to bind to (use IPx_ADDR_ANY to bind + * to any local address + * @param port the local port to bind to + * @return ERR_USE if the port is already in use + * ERR_VAL if bind failed because the PCB is not in a valid state + * ERR_OK if bound + */ +err_t +tcp_bind(struct tcp_pcb *pcb, const ip_addr_t *ipaddr, u16_t port) +{ + int i; + int max_pcb_list = NUM_TCP_PCB_LISTS; + struct tcp_pcb *cpcb; +#if LWIP_IPV6 && LWIP_IPV6_SCOPES + ip_addr_t zoned_ipaddr; +#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */ + + LWIP_ASSERT_CORE_LOCKED(); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IPv4 ANY) to subsequent functions */ + if (ipaddr == NULL) { + ipaddr = IP4_ADDR_ANY; + } +#else /* LWIP_IPV4 */ + LWIP_ERROR("tcp_bind: invalid ipaddr", ipaddr != NULL, return ERR_ARG); +#endif /* LWIP_IPV4 */ + + LWIP_ERROR("tcp_bind: invalid pcb", pcb != NULL, return ERR_ARG); + + LWIP_ERROR("tcp_bind: can only bind in state CLOSED", pcb->state == CLOSED, return ERR_VAL); + +#if SO_REUSE + /* Unless the REUSEADDR flag is set, + we have to check the pcbs in TIME-WAIT state, also. + We do not dump TIME_WAIT pcb's; they can still be matched by incoming + packets using both local and remote IP addresses and ports to distinguish. + */ + if (ip_get_option(pcb, SOF_REUSEADDR)) { + max_pcb_list = NUM_TCP_PCB_LISTS_NO_TIME_WAIT; + } +#endif /* SO_REUSE */ + +#if LWIP_IPV6 && LWIP_IPV6_SCOPES + /* If the given IP address should have a zone but doesn't, assign one now. + * This is legacy support: scope-aware callers should always provide properly + * zoned source addresses. Do the zone selection before the address-in-use + * check below; as such we have to make a temporary copy of the address. */ + if (IP_IS_V6(ipaddr) && ip6_addr_lacks_zone(ip_2_ip6(ipaddr), IP6_UNICAST)) { + ip_addr_copy(zoned_ipaddr, *ipaddr); + ip6_addr_select_zone(ip_2_ip6(&zoned_ipaddr), ip_2_ip6(&zoned_ipaddr)); + ipaddr = &zoned_ipaddr; + } +#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */ + + if (port == 0) { + port = tcp_new_port(); + if (port == 0) { + return ERR_BUF; + } + } else { + /* Check if the address already is in use (on all lists) */ + for (i = 0; i < max_pcb_list; i++) { + for (cpcb = *tcp_pcb_lists[i]; cpcb != NULL; cpcb = cpcb->next) { + if (cpcb->local_port == port) { +#if SO_REUSE + /* Omit checking for the same port if both pcbs have REUSEADDR set. + For SO_REUSEADDR, the duplicate-check for a 5-tuple is done in + tcp_connect. */ + if (!ip_get_option(pcb, SOF_REUSEADDR) || + !ip_get_option(cpcb, SOF_REUSEADDR)) +#endif /* SO_REUSE */ + { + /* @todo: check accept_any_ip_version */ + if ((IP_IS_V6(ipaddr) == IP_IS_V6_VAL(cpcb->local_ip)) && + (ip_addr_isany(&cpcb->local_ip) || + ip_addr_isany(ipaddr) || + ip_addr_eq(&cpcb->local_ip, ipaddr))) { + return ERR_USE; + } + } + } + } + } + } + + if (!ip_addr_isany(ipaddr) +#if LWIP_IPV4 && LWIP_IPV6 + || (IP_GET_TYPE(ipaddr) != IP_GET_TYPE(&pcb->local_ip)) +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + ) { + ip_addr_set(&pcb->local_ip, ipaddr); + } + pcb->local_port = port; + TCP_REG(&tcp_bound_pcbs, pcb); + LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: bind to port %"U16_F"\n", port)); + return ERR_OK; +} + +/** + * @ingroup tcp_raw + * Binds the connection to a netif and IP address. + * After calling this function, all packets received via this PCB + * are guaranteed to have come in via the specified netif, and all + * outgoing packets will go out via the specified netif. + * + * @param pcb the tcp_pcb to bind. + * @param netif the netif to bind to. Can be NULL. + */ +void +tcp_bind_netif(struct tcp_pcb *pcb, const struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + if (netif != NULL) { + pcb->netif_idx = netif_get_index(netif); + } else { + pcb->netif_idx = NETIF_NO_INDEX; + } +} + +#if LWIP_CALLBACK_API +/** + * Default accept callback if no accept callback is specified by the user. + */ +static err_t +tcp_accept_null(void *arg, struct tcp_pcb *pcb, err_t err) +{ + LWIP_UNUSED_ARG(arg); + LWIP_UNUSED_ARG(err); + + LWIP_ASSERT("tcp_accept_null: invalid pcb", pcb != NULL); + + tcp_abort(pcb); + + return ERR_ABRT; +} +#endif /* LWIP_CALLBACK_API */ + +/** + * @ingroup tcp_raw + * Set the state of the connection to be LISTEN, which means that it + * is able to accept incoming connections. The protocol control block + * is reallocated in order to consume less memory. Setting the + * connection to LISTEN is an irreversible process. + * When an incoming connection is accepted, the function specified with + * the tcp_accept() function will be called. The pcb has to be bound + * to a local port with the tcp_bind() function. + * + * The tcp_listen() function returns a new connection identifier, and + * the one passed as an argument to the function will be + * deallocated. The reason for this behavior is that less memory is + * needed for a connection that is listening, so tcp_listen() will + * reclaim the memory needed for the original connection and allocate a + * new smaller memory block for the listening connection. + * + * tcp_listen() may return NULL if no memory was available for the + * listening connection. If so, the memory associated with the pcb + * passed as an argument to tcp_listen() will not be deallocated. + * + * The backlog limits the number of outstanding connections + * in the listen queue to the value specified by the backlog argument. + * To use it, your need to set TCP_LISTEN_BACKLOG=1 in your lwipopts.h. + * + * @param pcb the original tcp_pcb + * @param backlog the incoming connections queue limit + * @return tcp_pcb used for listening, consumes less memory. + * + * @note The original tcp_pcb is freed. This function therefore has to be + * called like this: + * tpcb = tcp_listen_with_backlog(tpcb, backlog); + */ +struct tcp_pcb * +tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog) +{ + LWIP_ASSERT_CORE_LOCKED(); + return tcp_listen_with_backlog_and_err(pcb, backlog, NULL); +} + +/** + * @ingroup tcp_raw + * Set the state of the connection to be LISTEN, which means that it + * is able to accept incoming connections. The protocol control block + * is reallocated in order to consume less memory. Setting the + * connection to LISTEN is an irreversible process. + * + * @param pcb the original tcp_pcb + * @param backlog the incoming connections queue limit + * @param err when NULL is returned, this contains the error reason + * @return tcp_pcb used for listening, consumes less memory. + * + * @note The original tcp_pcb is freed. This function therefore has to be + * called like this: + * tpcb = tcp_listen_with_backlog_and_err(tpcb, backlog, &err); + */ +struct tcp_pcb * +tcp_listen_with_backlog_and_err(struct tcp_pcb *pcb, u8_t backlog, err_t *err) +{ + struct tcp_pcb_listen *lpcb = NULL; + err_t res; + + LWIP_UNUSED_ARG(backlog); + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("tcp_listen_with_backlog_and_err: invalid pcb", pcb != NULL, res = ERR_ARG; goto done); + LWIP_ERROR("tcp_listen_with_backlog_and_err: pcb already connected", pcb->state == CLOSED, res = ERR_CLSD; goto done); + + /* already listening? */ + if (pcb->state == LISTEN) { + lpcb = (struct tcp_pcb_listen *)pcb; + res = ERR_ALREADY; + goto done; + } +#if SO_REUSE + if (ip_get_option(pcb, SOF_REUSEADDR)) { + /* Since SOF_REUSEADDR allows reusing a local address before the pcb's usage + is declared (listen-/connection-pcb), we have to make sure now that + this port is only used once for every local IP. */ + for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) { + if ((lpcb->local_port == pcb->local_port) && + ip_addr_eq(&lpcb->local_ip, &pcb->local_ip)) { + /* this address/port is already used */ + lpcb = NULL; + res = ERR_USE; + goto done; + } + } + } +#endif /* SO_REUSE */ + lpcb = (struct tcp_pcb_listen *)memp_malloc(MEMP_TCP_PCB_LISTEN); + if (lpcb == NULL) { + res = ERR_MEM; + goto done; + } + lpcb->callback_arg = pcb->callback_arg; + lpcb->local_port = pcb->local_port; + lpcb->state = LISTEN; + lpcb->prio = pcb->prio; + lpcb->so_options = pcb->so_options; + lpcb->netif_idx = pcb->netif_idx; + lpcb->ttl = pcb->ttl; + lpcb->tos = pcb->tos; +#if LWIP_VLAN_PCP + lpcb->netif_hints.tci = pcb->netif_hints.tci; +#endif /* LWIP_VLAN_PCP */ +#if LWIP_IPV4 && LWIP_IPV6 + IP_SET_TYPE_VAL(lpcb->remote_ip, pcb->local_ip.type); +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + ip_addr_copy(lpcb->local_ip, pcb->local_ip); + if (pcb->local_port != 0) { + TCP_RMV(&tcp_bound_pcbs, pcb); + } +#if LWIP_TCP_PCB_NUM_EXT_ARGS + /* copy over ext_args to listening pcb */ + memcpy(&lpcb->ext_args, &pcb->ext_args, sizeof(pcb->ext_args)); +#endif + tcp_free(pcb); +#if LWIP_CALLBACK_API + lpcb->accept = tcp_accept_null; +#endif /* LWIP_CALLBACK_API */ +#if TCP_LISTEN_BACKLOG + lpcb->accepts_pending = 0; + tcp_backlog_set(lpcb, backlog); +#endif /* TCP_LISTEN_BACKLOG */ + TCP_REG(&tcp_listen_pcbs.pcbs, (struct tcp_pcb *)lpcb); + res = ERR_OK; +done: + if (err != NULL) { + *err = res; + } + return (struct tcp_pcb *)lpcb; +} + +/** + * Update the state that tracks the available window space to advertise. + * + * Returns how much extra window would be advertised if we sent an + * update now. + */ +u32_t +tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb) +{ + u32_t new_right_edge; + + LWIP_ASSERT("tcp_update_rcv_ann_wnd: invalid pcb", pcb != NULL); + new_right_edge = pcb->rcv_nxt + pcb->rcv_wnd; + + if (TCP_SEQ_GEQ(new_right_edge, pcb->rcv_ann_right_edge + LWIP_MIN((TCP_WND / 2), pcb->mss))) { + /* we can advertise more window */ + pcb->rcv_ann_wnd = pcb->rcv_wnd; + return new_right_edge - pcb->rcv_ann_right_edge; + } else { + if (TCP_SEQ_GT(pcb->rcv_nxt, pcb->rcv_ann_right_edge)) { + /* Can happen due to other end sending out of advertised window, + * but within actual available (but not yet advertised) window */ + pcb->rcv_ann_wnd = 0; + } else { + /* keep the right edge of window constant */ + u32_t new_rcv_ann_wnd = pcb->rcv_ann_right_edge - pcb->rcv_nxt; +#if !LWIP_WND_SCALE + LWIP_ASSERT("new_rcv_ann_wnd <= 0xffff", new_rcv_ann_wnd <= 0xffff); +#endif + pcb->rcv_ann_wnd = (tcpwnd_size_t)new_rcv_ann_wnd; + } + return 0; + } +} + +/** + * @ingroup tcp_raw + * This function should be called by the application when it has + * processed the data. The purpose is to advertise a larger window + * when the data has been processed. + * + * @param pcb the tcp_pcb for which data is read + * @param len the amount of bytes that have been read by the application + */ +void +tcp_recved(struct tcp_pcb *pcb, u16_t len) +{ + u32_t wnd_inflation; + tcpwnd_size_t rcv_wnd; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("tcp_recved: invalid pcb", pcb != NULL, return); + + /* pcb->state LISTEN not allowed here */ + LWIP_ASSERT("don't call tcp_recved for listen-pcbs", + pcb->state != LISTEN); + + rcv_wnd = (tcpwnd_size_t)(pcb->rcv_wnd + len); + if ((rcv_wnd > TCP_WND_MAX(pcb)) || (rcv_wnd < pcb->rcv_wnd)) { + /* window got too big or tcpwnd_size_t overflow */ + LWIP_DEBUGF(TCP_DEBUG, ("tcp_recved: window got too big or tcpwnd_size_t overflow\n")); + pcb->rcv_wnd = TCP_WND_MAX(pcb); + } else { + pcb->rcv_wnd = rcv_wnd; + } + + wnd_inflation = tcp_update_rcv_ann_wnd(pcb); + + /* If the change in the right edge of window is significant (default + * watermark is TCP_WND/4), then send an explicit update now. + * Otherwise wait for a packet to be sent in the normal course of + * events (or more window to be available later) */ + if (wnd_inflation >= TCP_WND_UPDATE_THRESHOLD) { + tcp_ack_now(pcb); + tcp_output(pcb); + } + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_recved: received %"U16_F" bytes, wnd %"TCPWNDSIZE_F" (%"TCPWNDSIZE_F").\n", + len, pcb->rcv_wnd, (u16_t)(TCP_WND_MAX(pcb) - pcb->rcv_wnd))); +} + +/** + * Allocate a new local TCP port. + * + * @return a new (free) local TCP port number + */ +static u16_t +tcp_new_port(void) +{ + u8_t i; + u16_t n = 0; + struct tcp_pcb *pcb; + +again: + tcp_port++; + if (tcp_port == TCP_LOCAL_PORT_RANGE_END) { + tcp_port = TCP_LOCAL_PORT_RANGE_START; + } + /* Check all PCB lists. */ + for (i = 0; i < NUM_TCP_PCB_LISTS; i++) { + for (pcb = *tcp_pcb_lists[i]; pcb != NULL; pcb = pcb->next) { + if (pcb->local_port == tcp_port) { + n++; + if (n > (TCP_LOCAL_PORT_RANGE_END - TCP_LOCAL_PORT_RANGE_START)) { + return 0; + } + goto again; + } + } + } + return tcp_port; +} + +/** + * @ingroup tcp_raw + * Connects to another host. The function given as the "connected" + * argument will be called when the connection has been established. + * Sets up the pcb to connect to the remote host and sends the + * initial SYN segment which opens the connection. + * + * The tcp_connect() function returns immediately; it does not wait for + * the connection to be properly setup. Instead, it will call the + * function specified as the fourth argument (the "connected" argument) + * when the connection is established. If the connection could not be + * properly established, either because the other host refused the + * connection or because the other host didn't answer, the "err" + * callback function of this pcb (registered with tcp_err, see below) + * will be called. + * + * The tcp_connect() function can return ERR_MEM if no memory is + * available for enqueueing the SYN segment. If the SYN indeed was + * enqueued successfully, the tcp_connect() function returns ERR_OK. + * + * @param pcb the tcp_pcb used to establish the connection + * @param ipaddr the remote ip address to connect to + * @param port the remote tcp port to connect to + * @param connected callback function to call when connected (on error, + the err callback will be called) + * @return ERR_VAL if invalid arguments are given + * ERR_OK if connect request has been sent + * other err_t values if connect request couldn't be sent + */ +err_t +tcp_connect(struct tcp_pcb *pcb, const ip_addr_t *ipaddr, u16_t port, + tcp_connected_fn connected) +{ + struct netif *netif = NULL; + err_t ret; + u32_t iss; + u16_t old_local_port; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("tcp_connect: invalid pcb", pcb != NULL, return ERR_ARG); + LWIP_ERROR("tcp_connect: invalid ipaddr", ipaddr != NULL, return ERR_ARG); + + LWIP_ERROR("tcp_connect: can only connect from state CLOSED", pcb->state == CLOSED, return ERR_ISCONN); + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_connect to port %"U16_F"\n", port)); + ip_addr_set(&pcb->remote_ip, ipaddr); + pcb->remote_port = port; + + if (pcb->netif_idx != NETIF_NO_INDEX) { + netif = netif_get_by_index(pcb->netif_idx); + } else { + /* check if we have a route to the remote host */ + netif = ip_route(&pcb->local_ip, &pcb->remote_ip); + } + if (netif == NULL) { + /* Don't even try to send a SYN packet if we have no route since that will fail. */ + return ERR_RTE; + } + + /* check if local IP has been assigned to pcb, if not, get one */ + if (ip_addr_isany(&pcb->local_ip)) { + const ip_addr_t *local_ip = ip_netif_get_local_ip(netif, ipaddr); + if (local_ip == NULL) { + return ERR_RTE; + } + ip_addr_copy(pcb->local_ip, *local_ip); + } + +#if LWIP_IPV6 && LWIP_IPV6_SCOPES + /* If the given IP address should have a zone but doesn't, assign one now. + * Given that we already have the target netif, this is easy and cheap. */ + if (IP_IS_V6(&pcb->remote_ip) && + ip6_addr_lacks_zone(ip_2_ip6(&pcb->remote_ip), IP6_UNICAST)) { + ip6_addr_assign_zone(ip_2_ip6(&pcb->remote_ip), IP6_UNICAST, netif); + } +#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */ + + old_local_port = pcb->local_port; + if (pcb->local_port == 0) { + pcb->local_port = tcp_new_port(); + if (pcb->local_port == 0) { + return ERR_BUF; + } + } else { +#if SO_REUSE + if (ip_get_option(pcb, SOF_REUSEADDR)) { + /* Since SOF_REUSEADDR allows reusing a local address, we have to make sure + now that the 5-tuple is unique. */ + struct tcp_pcb *cpcb; + int i; + /* Don't check listen- and bound-PCBs, check active- and TIME-WAIT PCBs. */ + for (i = 2; i < NUM_TCP_PCB_LISTS; i++) { + for (cpcb = *tcp_pcb_lists[i]; cpcb != NULL; cpcb = cpcb->next) { + if ((cpcb->local_port == pcb->local_port) && + (cpcb->remote_port == port) && + ip_addr_eq(&cpcb->local_ip, &pcb->local_ip) && + ip_addr_eq(&cpcb->remote_ip, ipaddr)) { + /* linux returns EISCONN here, but ERR_USE should be OK for us */ + return ERR_USE; + } + } + } + } +#endif /* SO_REUSE */ + } + + iss = tcp_next_iss(pcb); + pcb->rcv_nxt = 0; + pcb->snd_nxt = iss; + pcb->lastack = iss - 1; + pcb->snd_wl2 = iss - 1; + pcb->snd_lbb = iss - 1; + /* Start with a window that does not need scaling. When window scaling is + enabled and used, the window is enlarged when both sides agree on scaling. */ + pcb->rcv_wnd = pcb->rcv_ann_wnd = TCPWND_MIN16(TCP_WND); + pcb->rcv_ann_right_edge = pcb->rcv_nxt; + pcb->snd_wnd = TCP_WND; + /* As initial send MSS, we use TCP_MSS but limit it to 536. + The send MSS is updated when an MSS option is received. */ + pcb->mss = INITIAL_MSS; +#if TCP_CALCULATE_EFF_SEND_MSS + pcb->mss = tcp_eff_send_mss_netif(pcb->mss, netif, &pcb->remote_ip); +#endif /* TCP_CALCULATE_EFF_SEND_MSS */ + pcb->cwnd = 1; +#if LWIP_CALLBACK_API + pcb->connected = connected; +#else /* LWIP_CALLBACK_API */ + LWIP_UNUSED_ARG(connected); +#endif /* LWIP_CALLBACK_API */ + + /* Send a SYN together with the MSS option. */ + ret = tcp_enqueue_flags(pcb, TCP_SYN); + if (ret == ERR_OK) { + /* SYN segment was enqueued, changed the pcbs state now */ + pcb->state = SYN_SENT; + if (old_local_port != 0) { + TCP_RMV(&tcp_bound_pcbs, pcb); + } + TCP_REG_ACTIVE(pcb); + MIB2_STATS_INC(mib2.tcpactiveopens); + + tcp_output(pcb); + } + return ret; +} + +/** + * Called every 500 ms and implements the retransmission timer and the timer that + * removes PCBs that have been in TIME-WAIT for enough time. It also increments + * various timers such as the inactivity timer in each PCB. + * + * Automatically called from tcp_tmr(). + */ +void +tcp_slowtmr(void) +{ + struct tcp_pcb *pcb, *prev; + tcpwnd_size_t eff_wnd; + u8_t pcb_remove; /* flag if a PCB should be removed */ + u8_t pcb_reset; /* flag if a RST should be sent when removing */ + err_t err; + + err = ERR_OK; + + ++tcp_ticks; + ++tcp_timer_ctr; + +tcp_slowtmr_start: + /* Steps through all of the active PCBs. */ + prev = NULL; + pcb = tcp_active_pcbs; + if (pcb == NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: no active pcbs\n")); + } + while (pcb != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: processing active pcb\n")); + LWIP_ASSERT("tcp_slowtmr: active pcb->state != CLOSED", pcb->state != CLOSED); + LWIP_ASSERT("tcp_slowtmr: active pcb->state != LISTEN", pcb->state != LISTEN); + LWIP_ASSERT("tcp_slowtmr: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT); + if (pcb->last_timer == tcp_timer_ctr) { + /* skip this pcb, we have already processed it */ + prev = pcb; + pcb = pcb->next; + continue; + } + pcb->last_timer = tcp_timer_ctr; + + pcb_remove = 0; + pcb_reset = 0; + + if (pcb->state == SYN_SENT && pcb->nrtx >= TCP_SYNMAXRTX) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: max SYN retries reached\n")); + } else if (pcb->nrtx >= TCP_MAXRTX) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: max DATA retries reached\n")); + } else { + if (pcb->persist_backoff > 0) { + LWIP_ASSERT("tcp_slowtimr: persist ticking with in-flight data", pcb->unacked == NULL); + LWIP_ASSERT("tcp_slowtimr: persist ticking with empty send buffer", pcb->unsent != NULL); + if (pcb->persist_probe >= TCP_MAXRTX) { + ++pcb_remove; /* max probes reached */ + } else { + u8_t backoff_cnt = tcp_persist_backoff[pcb->persist_backoff - 1]; + if (pcb->persist_cnt < backoff_cnt) { + pcb->persist_cnt++; + } + if (pcb->persist_cnt >= backoff_cnt) { + int next_slot = 1; /* increment timer to next slot */ + /* If snd_wnd is zero, send 1 byte probes */ + if (pcb->snd_wnd == 0) { + if (tcp_zero_window_probe(pcb) != ERR_OK) { + next_slot = 0; /* try probe again with current slot */ + } + /* snd_wnd not fully closed, split unsent head and fill window */ + } else { + if (tcp_split_unsent_seg(pcb, (u16_t)pcb->snd_wnd) == ERR_OK) { + if (tcp_output(pcb) == ERR_OK) { + /* sending will cancel persist timer, else retry with current slot */ + next_slot = 0; + } + } + } + if (next_slot) { + pcb->persist_cnt = 0; + if (pcb->persist_backoff < sizeof(tcp_persist_backoff)) { + pcb->persist_backoff++; + } + } + } + } + } else { + /* Increase the retransmission timer if it is running */ + if ((pcb->rtime >= 0) && (pcb->rtime < 0x7FFF)) { + ++pcb->rtime; + } + + if (pcb->rtime >= pcb->rto) { + /* Time for a retransmission. */ + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_slowtmr: rtime %"S16_F + " pcb->rto %"S16_F"\n", + pcb->rtime, pcb->rto)); + /* If prepare phase fails but we have unsent data but no unacked data, + still execute the backoff calculations below, as this means we somehow + failed to send segment. */ + if ((tcp_rexmit_rto_prepare(pcb) == ERR_OK) || ((pcb->unacked == NULL) && (pcb->unsent != NULL))) { + /* Double retransmission time-out unless we are trying to + * connect to somebody (i.e., we are in SYN_SENT). */ + if (pcb->state != SYN_SENT) { + u8_t backoff_idx = LWIP_MIN(pcb->nrtx, sizeof(tcp_backoff) - 1); + int calc_rto = ((pcb->sa >> 3) + pcb->sv) << tcp_backoff[backoff_idx]; + pcb->rto = (s16_t)LWIP_MIN(calc_rto, 0x7FFF); + } + + /* Reset the retransmission timer. */ + pcb->rtime = 0; + + /* Reduce congestion window and ssthresh. */ + eff_wnd = LWIP_MIN(pcb->cwnd, pcb->snd_wnd); + pcb->ssthresh = eff_wnd >> 1; + if (pcb->ssthresh < (tcpwnd_size_t)(pcb->mss << 1)) { + pcb->ssthresh = (tcpwnd_size_t)(pcb->mss << 1); + } + pcb->cwnd = pcb->mss; + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: cwnd %"TCPWNDSIZE_F + " ssthresh %"TCPWNDSIZE_F"\n", + pcb->cwnd, pcb->ssthresh)); + pcb->bytes_acked = 0; + + /* The following needs to be called AFTER cwnd is set to one + mss - STJ */ + tcp_rexmit_rto_commit(pcb); + } + } + } + } + /* Check if this PCB has stayed too long in FIN-WAIT-2 */ + if (pcb->state == FIN_WAIT_2) { + /* If this PCB is in FIN_WAIT_2 because of SHUT_WR don't let it time out. */ + if (pcb->flags & TF_RXCLOSED) { + /* PCB was fully closed (either through close() or SHUT_RDWR): + normal FIN-WAIT timeout handling. */ + if ((u32_t)(tcp_ticks - pcb->tmr) > + TCP_FIN_WAIT_TIMEOUT / TCP_SLOW_INTERVAL) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in FIN-WAIT-2\n")); + } + } + } + + /* Check if KEEPALIVE should be sent */ + if (ip_get_option(pcb, SOF_KEEPALIVE) && + ((pcb->state == ESTABLISHED) || + (pcb->state == CLOSE_WAIT))) { + if ((u32_t)(tcp_ticks - pcb->tmr) > + (pcb->keep_idle + TCP_KEEP_DUR(pcb)) / TCP_SLOW_INTERVAL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: KEEPALIVE timeout. Aborting connection to ")); + ip_addr_debug_print_val(TCP_DEBUG, pcb->remote_ip); + LWIP_DEBUGF(TCP_DEBUG, ("\n")); + + ++pcb_remove; + ++pcb_reset; + } else if ((u32_t)(tcp_ticks - pcb->tmr) > + (pcb->keep_idle + pcb->keep_cnt_sent * TCP_KEEP_INTVL(pcb)) + / TCP_SLOW_INTERVAL) { + err = tcp_keepalive(pcb); + if (err == ERR_OK) { + pcb->keep_cnt_sent++; + } + } + } + + /* If this PCB has queued out of sequence data, but has been + inactive for too long, will drop the data (it will eventually + be retransmitted). */ +#if TCP_QUEUE_OOSEQ + if (pcb->ooseq != NULL && + (tcp_ticks - pcb->tmr >= (u32_t)pcb->rto * TCP_OOSEQ_TIMEOUT)) { + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: dropping OOSEQ queued data\n")); + tcp_free_ooseq(pcb); + } +#endif /* TCP_QUEUE_OOSEQ */ + + /* Check if this PCB has stayed too long in SYN-RCVD */ + if (pcb->state == SYN_RCVD) { + if ((u32_t)(tcp_ticks - pcb->tmr) > + TCP_SYN_RCVD_TIMEOUT / TCP_SLOW_INTERVAL) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in SYN-RCVD\n")); + } + } + + /* Check if this PCB has stayed too long in LAST-ACK */ + if (pcb->state == LAST_ACK) { + if ((u32_t)(tcp_ticks - pcb->tmr) > 2 * TCP_MSL / TCP_SLOW_INTERVAL) { + ++pcb_remove; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in LAST-ACK\n")); + } + } + + /* If the PCB should be removed, do it. */ + if (pcb_remove) { + struct tcp_pcb *pcb2; +#if LWIP_CALLBACK_API + tcp_err_fn err_fn = pcb->errf; +#endif /* LWIP_CALLBACK_API */ + void *err_arg; + enum tcp_state last_state; + tcp_pcb_purge(pcb); + /* Remove PCB from tcp_active_pcbs list. */ + if (prev != NULL) { + LWIP_ASSERT("tcp_slowtmr: middle tcp != tcp_active_pcbs", pcb != tcp_active_pcbs); + prev->next = pcb->next; + } else { + /* This PCB was the first. */ + LWIP_ASSERT("tcp_slowtmr: first pcb == tcp_active_pcbs", tcp_active_pcbs == pcb); + tcp_active_pcbs = pcb->next; + } + + if (pcb_reset) { + tcp_rst(pcb, pcb->snd_nxt, pcb->rcv_nxt, &pcb->local_ip, &pcb->remote_ip, + pcb->local_port, pcb->remote_port); + } + + err_arg = pcb->callback_arg; + last_state = pcb->state; + pcb2 = pcb; + pcb = pcb->next; + tcp_free(pcb2); + + tcp_active_pcbs_changed = 0; + TCP_EVENT_ERR(last_state, err_fn, err_arg, ERR_ABRT); + if (tcp_active_pcbs_changed) { + goto tcp_slowtmr_start; + } + } else { + /* get the 'next' element now and work with 'prev' below (in case of abort) */ + prev = pcb; + pcb = pcb->next; + + /* We check if we should poll the connection. */ + ++prev->polltmr; + if (prev->polltmr >= prev->pollinterval) { + prev->polltmr = 0; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: polling application\n")); + tcp_active_pcbs_changed = 0; + TCP_EVENT_POLL(prev, err); + if (tcp_active_pcbs_changed) { + goto tcp_slowtmr_start; + } + /* if err == ERR_ABRT, 'prev' is already deallocated */ + if (err == ERR_OK) { + tcp_output(prev); + } + } + } + } + + + /* Steps through all of the TIME-WAIT PCBs. */ + prev = NULL; + pcb = tcp_tw_pcbs; + while (pcb != NULL) { + LWIP_ASSERT("tcp_slowtmr: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); + pcb_remove = 0; + + /* Check if this PCB has stayed long enough in TIME-WAIT */ + if ((u32_t)(tcp_ticks - pcb->tmr) > 2 * TCP_MSL / TCP_SLOW_INTERVAL) { + ++pcb_remove; + } + + /* If the PCB should be removed, do it. */ + if (pcb_remove) { + struct tcp_pcb *pcb2; + tcp_pcb_purge(pcb); + /* Remove PCB from tcp_tw_pcbs list. */ + if (prev != NULL) { + LWIP_ASSERT("tcp_slowtmr: middle tcp != tcp_tw_pcbs", pcb != tcp_tw_pcbs); + prev->next = pcb->next; + } else { + /* This PCB was the first. */ + LWIP_ASSERT("tcp_slowtmr: first pcb == tcp_tw_pcbs", tcp_tw_pcbs == pcb); + tcp_tw_pcbs = pcb->next; + } + pcb2 = pcb; + pcb = pcb->next; + tcp_free(pcb2); + } else { + prev = pcb; + pcb = pcb->next; + } + } +} + +/** + * Is called every TCP_FAST_INTERVAL (250 ms) and process data previously + * "refused" by upper layer (application) and sends delayed ACKs or pending FINs. + * + * Automatically called from tcp_tmr(). + */ +void +tcp_fasttmr(void) +{ + struct tcp_pcb *pcb; + + ++tcp_timer_ctr; + +tcp_fasttmr_start: + pcb = tcp_active_pcbs; + + while (pcb != NULL) { + if (pcb->last_timer != tcp_timer_ctr) { + struct tcp_pcb *next; + pcb->last_timer = tcp_timer_ctr; + /* send delayed ACKs */ + if (pcb->flags & TF_ACK_DELAY) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_fasttmr: delayed ACK\n")); + tcp_ack_now(pcb); + tcp_output(pcb); + tcp_clear_flags(pcb, TF_ACK_DELAY | TF_ACK_NOW); + } + /* send pending FIN */ + if (pcb->flags & TF_CLOSEPEND) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_fasttmr: pending FIN\n")); + tcp_clear_flags(pcb, TF_CLOSEPEND); + tcp_close_shutdown_fin(pcb); + } + + next = pcb->next; + + /* If there is data which was previously "refused" by upper layer */ + if (pcb->refused_data != NULL) { + tcp_active_pcbs_changed = 0; + tcp_process_refused_data(pcb); + if (tcp_active_pcbs_changed) { + /* application callback has changed the pcb list: restart the loop */ + goto tcp_fasttmr_start; + } + } + pcb = next; + } else { + pcb = pcb->next; + } + } +} + +/** Call tcp_output for all active pcbs that have TF_NAGLEMEMERR set */ +void +tcp_txnow(void) +{ + struct tcp_pcb *pcb; + + for (pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->flags & TF_NAGLEMEMERR) { + tcp_output(pcb); + } + } +} + +/** Pass pcb->refused_data to the recv callback */ +err_t +tcp_process_refused_data(struct tcp_pcb *pcb) +{ +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + struct pbuf *rest; +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + + LWIP_ERROR("tcp_process_refused_data: invalid pcb", pcb != NULL, return ERR_ARG); + +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + while (pcb->refused_data != NULL) +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + { + err_t err; + u8_t refused_flags = pcb->refused_data->flags; + /* set pcb->refused_data to NULL in case the callback frees it and then + closes the pcb */ + struct pbuf *refused_data = pcb->refused_data; +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + pbuf_split_64k(refused_data, &rest); + pcb->refused_data = rest; +#else /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + pcb->refused_data = NULL; +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + /* Notify again application with data previously received. */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: notify kept packet\n")); + TCP_EVENT_RECV(pcb, refused_data, ERR_OK, err); + if (err == ERR_OK) { + /* did refused_data include a FIN? */ + if ((refused_flags & PBUF_FLAG_TCP_FIN) +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + && (rest == NULL) +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + ) { + /* correct rcv_wnd as the application won't call tcp_recved() + for the FIN's seqno */ + if (pcb->rcv_wnd != TCP_WND_MAX(pcb)) { + pcb->rcv_wnd++; + } + TCP_EVENT_CLOSED(pcb, err); + if (err == ERR_ABRT) { + return ERR_ABRT; + } + } + } else if (err == ERR_ABRT) { + /* if err == ERR_ABRT, 'pcb' is already deallocated */ + /* Drop incoming packets because pcb is "full" (only if the incoming + segment contains data). */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: drop incoming packets, because pcb is "full"\n")); + return ERR_ABRT; + } else { + /* data is still refused, pbuf is still valid (go on for ACK-only packets) */ +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + if (rest != NULL) { + pbuf_cat(refused_data, rest); + } +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + pcb->refused_data = refused_data; + return ERR_INPROGRESS; + } + } + return ERR_OK; +} + +/** + * Deallocates a list of TCP segments (tcp_seg structures). + * + * @param seg tcp_seg list of TCP segments to free + */ +void +tcp_segs_free(struct tcp_seg *seg) +{ + while (seg != NULL) { + struct tcp_seg *next = seg->next; + tcp_seg_free(seg); + seg = next; + } +} + +/** + * Frees a TCP segment (tcp_seg structure). + * + * @param seg single tcp_seg to free + */ +void +tcp_seg_free(struct tcp_seg *seg) +{ + if (seg != NULL) { + if (seg->p != NULL) { + pbuf_free(seg->p); +#if TCP_DEBUG + seg->p = NULL; +#endif /* TCP_DEBUG */ + } + memp_free(MEMP_TCP_SEG, seg); + } +} + +/** + * @ingroup tcp + * Sets the priority of a connection. + * + * @param pcb the tcp_pcb to manipulate + * @param prio new priority + */ +void +tcp_setprio(struct tcp_pcb *pcb, u8_t prio) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("tcp_setprio: invalid pcb", pcb != NULL, return); + + pcb->prio = prio; +} + +#if TCP_QUEUE_OOSEQ +/** + * Returns a copy of the given TCP segment. + * The pbuf and data are not copied, only the pointers + * + * @param seg the old tcp_seg + * @return a copy of seg + */ +struct tcp_seg * +tcp_seg_copy(struct tcp_seg *seg) +{ + struct tcp_seg *cseg; + + LWIP_ASSERT("tcp_seg_copy: invalid seg", seg != NULL); + + cseg = (struct tcp_seg *)memp_malloc(MEMP_TCP_SEG); + if (cseg == NULL) { + return NULL; + } + SMEMCPY((u8_t *)cseg, (const u8_t *)seg, sizeof(struct tcp_seg)); + pbuf_ref(cseg->p); + return cseg; +} +#endif /* TCP_QUEUE_OOSEQ */ + +#if LWIP_CALLBACK_API +/** + * Default receive callback that is called if the user didn't register + * a recv callback for the pcb. + */ +err_t +tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) +{ + LWIP_UNUSED_ARG(arg); + + LWIP_ERROR("tcp_recv_null: invalid pcb", pcb != NULL, return ERR_ARG); + + if (p != NULL) { + tcp_recved(pcb, p->tot_len); + pbuf_free(p); + } else if (err == ERR_OK) { + return tcp_close(pcb); + } + return ERR_OK; +} +#endif /* LWIP_CALLBACK_API */ + +/** + * Kills the oldest active connection that has a lower priority than 'prio'. + * + * @param prio minimum priority + */ +static void +tcp_kill_prio(u8_t prio) +{ + struct tcp_pcb *pcb, *inactive; + u32_t inactivity; + u8_t mprio; + + mprio = LWIP_MIN(TCP_PRIO_MAX, prio); + + /* We want to kill connections with a lower prio, so bail out if + * supplied prio is 0 - there can never be a lower prio + */ + if (mprio == 0) { + return; + } + + /* We only want kill connections with a lower prio, so decrement prio by one + * and start searching for oldest connection with same or lower priority than mprio. + * We want to find the connections with the lowest possible prio, and among + * these the one with the longest inactivity time. + */ + mprio--; + + inactivity = 0; + inactive = NULL; + for (pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + /* lower prio is always a kill candidate */ + if ((pcb->prio < mprio) || + /* longer inactivity is also a kill candidate */ + ((pcb->prio == mprio) && ((u32_t)(tcp_ticks - pcb->tmr) >= inactivity))) { + inactivity = tcp_ticks - pcb->tmr; + inactive = pcb; + mprio = pcb->prio; + } + } + if (inactive != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_prio: killing oldest PCB %p (%"S32_F")\n", + (void *)inactive, inactivity)); + tcp_abort(inactive); + } +} + +/** + * Kills the oldest connection that is in specific state. + * Called from tcp_alloc() for LAST_ACK and CLOSING if no more connections are available. + */ +static void +tcp_kill_state(enum tcp_state state) +{ + struct tcp_pcb *pcb, *inactive; + u32_t inactivity; + + LWIP_ASSERT("invalid state", (state == CLOSING) || (state == LAST_ACK)); + + inactivity = 0; + inactive = NULL; + /* Go through the list of active pcbs and get the oldest pcb that is in state + CLOSING/LAST_ACK. */ + for (pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->state == state) { + if ((u32_t)(tcp_ticks - pcb->tmr) >= inactivity) { + inactivity = tcp_ticks - pcb->tmr; + inactive = pcb; + } + } + } + if (inactive != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_closing: killing oldest %s PCB %p (%"S32_F")\n", + tcp_state_str[state], (void *)inactive, inactivity)); + /* Don't send a RST, since no data is lost. */ + tcp_abandon(inactive, 0); + } +} + +/** + * Kills the oldest connection that is in TIME_WAIT state. + * Called from tcp_alloc() if no more connections are available. + */ +static void +tcp_kill_timewait(void) +{ + struct tcp_pcb *pcb, *inactive; + u32_t inactivity; + + inactivity = 0; + inactive = NULL; + /* Go through the list of TIME_WAIT pcbs and get the oldest pcb. */ + for (pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + if ((u32_t)(tcp_ticks - pcb->tmr) >= inactivity) { + inactivity = tcp_ticks - pcb->tmr; + inactive = pcb; + } + } + if (inactive != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_timewait: killing oldest TIME-WAIT PCB %p (%"S32_F")\n", + (void *)inactive, inactivity)); + tcp_abort(inactive); + } +} + +/* Called when allocating a pcb fails. + * In this case, we want to handle all pcbs that want to close first: if we can + * now send the FIN (which failed before), the pcb might be in a state that is + * OK for us to now free it. + */ +static void +tcp_handle_closepend(void) +{ + struct tcp_pcb *pcb = tcp_active_pcbs; + + while (pcb != NULL) { + struct tcp_pcb *next = pcb->next; + /* send pending FIN */ + if (pcb->flags & TF_CLOSEPEND) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_handle_closepend: pending FIN\n")); + tcp_clear_flags(pcb, TF_CLOSEPEND); + tcp_close_shutdown_fin(pcb); + } + pcb = next; + } +} + +/** + * Allocate a new tcp_pcb structure. + * + * @param prio priority for the new pcb + * @return a new tcp_pcb that initially is in state CLOSED + */ +struct tcp_pcb * +tcp_alloc(u8_t prio) +{ + struct tcp_pcb *pcb; + + LWIP_ASSERT_CORE_LOCKED(); + + pcb = (struct tcp_pcb *)memp_malloc(MEMP_TCP_PCB); + if (pcb == NULL) { + /* Try to send FIN for all pcbs stuck in TF_CLOSEPEND first */ + tcp_handle_closepend(); + + /* Try killing oldest connection in TIME-WAIT. */ + LWIP_DEBUGF(TCP_DEBUG, ("tcp_alloc: killing off oldest TIME-WAIT connection\n")); + tcp_kill_timewait(); + /* Try to allocate a tcp_pcb again. */ + pcb = (struct tcp_pcb *)memp_malloc(MEMP_TCP_PCB); + if (pcb == NULL) { + /* Try killing oldest connection in LAST-ACK (these wouldn't go to TIME-WAIT). */ + LWIP_DEBUGF(TCP_DEBUG, ("tcp_alloc: killing off oldest LAST-ACK connection\n")); + tcp_kill_state(LAST_ACK); + /* Try to allocate a tcp_pcb again. */ + pcb = (struct tcp_pcb *)memp_malloc(MEMP_TCP_PCB); + if (pcb == NULL) { + /* Try killing oldest connection in CLOSING. */ + LWIP_DEBUGF(TCP_DEBUG, ("tcp_alloc: killing off oldest CLOSING connection\n")); + tcp_kill_state(CLOSING); + /* Try to allocate a tcp_pcb again. */ + pcb = (struct tcp_pcb *)memp_malloc(MEMP_TCP_PCB); + if (pcb == NULL) { + /* Try killing oldest active connection with lower priority than the new one. */ + LWIP_DEBUGF(TCP_DEBUG, ("tcp_alloc: killing oldest connection with prio lower than %d\n", prio)); + tcp_kill_prio(prio); + /* Try to allocate a tcp_pcb again. */ + pcb = (struct tcp_pcb *)memp_malloc(MEMP_TCP_PCB); + if (pcb != NULL) { + /* adjust err stats: memp_malloc failed multiple times before */ + MEMP_STATS_DEC(err, MEMP_TCP_PCB); + } + } + if (pcb != NULL) { + /* adjust err stats: memp_malloc failed multiple times before */ + MEMP_STATS_DEC(err, MEMP_TCP_PCB); + } + } + if (pcb != NULL) { + /* adjust err stats: memp_malloc failed multiple times before */ + MEMP_STATS_DEC(err, MEMP_TCP_PCB); + } + } + if (pcb != NULL) { + /* adjust err stats: memp_malloc failed above */ + MEMP_STATS_DEC(err, MEMP_TCP_PCB); + } + } + if (pcb != NULL) { + /* zero out the whole pcb, so there is no need to initialize members to zero */ + memset(pcb, 0, sizeof(struct tcp_pcb)); + pcb->prio = prio; + pcb->snd_buf = TCP_SND_BUF; + /* Start with a window that does not need scaling. When window scaling is + enabled and used, the window is enlarged when both sides agree on scaling. */ + pcb->rcv_wnd = pcb->rcv_ann_wnd = TCPWND_MIN16(TCP_WND); + pcb->ttl = TCP_TTL; + /* As initial send MSS, we use TCP_MSS but limit it to 536. + The send MSS is updated when an MSS option is received. */ + pcb->mss = INITIAL_MSS; + /* Set initial TCP's retransmission timeout to 3000 ms by default. + This value could be configured in lwipopts */ + pcb->rto = LWIP_TCP_RTO_TIME / TCP_SLOW_INTERVAL; + pcb->sv = LWIP_TCP_RTO_TIME / TCP_SLOW_INTERVAL; + pcb->rtime = -1; + pcb->cwnd = 1; + pcb->tmr = tcp_ticks; + pcb->last_timer = tcp_timer_ctr; + + /* RFC 5681 recommends setting ssthresh arbitrarily high and gives an example + of using the largest advertised receive window. We've seen complications with + receiving TCPs that use window scaling and/or window auto-tuning where the + initial advertised window is very small and then grows rapidly once the + connection is established. To avoid these complications, we set ssthresh to the + largest effective cwnd (amount of in-flight data) that the sender can have. */ + pcb->ssthresh = TCP_SND_BUF; + +#if LWIP_CALLBACK_API + pcb->recv = tcp_recv_null; +#endif /* LWIP_CALLBACK_API */ + + /* Init KEEPALIVE timer */ + pcb->keep_idle = TCP_KEEPIDLE_DEFAULT; + +#if LWIP_TCP_KEEPALIVE + pcb->keep_intvl = TCP_KEEPINTVL_DEFAULT; + pcb->keep_cnt = TCP_KEEPCNT_DEFAULT; +#endif /* LWIP_TCP_KEEPALIVE */ + pcb_tci_init(pcb); + } + return pcb; +} + +/** + * @ingroup tcp_raw + * Creates a new TCP protocol control block but doesn't place it on + * any of the TCP PCB lists. + * The pcb is not put on any list until binding using tcp_bind(). + * If memory is not available for creating the new pcb, NULL is returned. + * @see MEMP_NUM_TCP_PCB_LISTEN and MEMP_NUM_TCP_PCB + * + * @internal: Maybe there should be a idle TCP PCB list where these + * PCBs are put on. Port reservation using tcp_bind() is implemented but + * allocated pcbs that are not bound can't be killed automatically if wanting + * to allocate a pcb with higher prio (@see tcp_kill_prio()) + * + * @return a new tcp_pcb that initially is in state CLOSED + */ +struct tcp_pcb * +tcp_new(void) +{ + return tcp_alloc(TCP_PRIO_NORMAL); +} + +/** + * @ingroup tcp_raw + * Creates a new TCP protocol control block but doesn't + * place it on any of the TCP PCB lists. + * The pcb is not put on any list until binding using tcp_bind(). + * @see MEMP_NUM_TCP_PCB_LISTEN and MEMP_NUM_TCP_PCB + * + * @param type IP address type, see @ref lwip_ip_addr_type definitions. + * If you want to listen to IPv4 and IPv6 (dual-stack) connections, + * supply @ref IPADDR_TYPE_ANY as argument and bind to @ref IP_ANY_TYPE. + * @return a new tcp_pcb that initially is in state CLOSED + */ +struct tcp_pcb * +tcp_new_ip_type(u8_t type) +{ + struct tcp_pcb *pcb; + pcb = tcp_alloc(TCP_PRIO_NORMAL); +#if LWIP_IPV4 && LWIP_IPV6 + if (pcb != NULL) { + IP_SET_TYPE_VAL(pcb->local_ip, type); + IP_SET_TYPE_VAL(pcb->remote_ip, type); + } +#else + LWIP_UNUSED_ARG(type); +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + return pcb; +} + +/** + * @ingroup tcp_raw + * Specifies the program specific state that should be passed to all + * other callback functions. The "pcb" argument is the current TCP + * connection control block, and the "arg" argument is the argument + * that will be passed to the callbacks. + * + * @param pcb tcp_pcb to set the callback argument + * @param arg void pointer argument to pass to callback functions + */ +void +tcp_arg(struct tcp_pcb *pcb, void *arg) +{ + LWIP_ASSERT_CORE_LOCKED(); + /* This function is allowed to be called for both listen pcbs and + connection pcbs. */ + if (pcb != NULL) { + pcb->callback_arg = arg; + } +} +#if LWIP_CALLBACK_API + +/** + * @ingroup tcp_raw + * Sets the callback function that will be called when new data + * arrives. The callback function will be passed a NULL pbuf to + * indicate that the remote host has closed the connection. If the + * callback function returns ERR_OK or ERR_ABRT it must have + * freed the pbuf, otherwise it must not have freed it. + * + * @param pcb tcp_pcb to set the recv callback + * @param recv callback function to call for this pcb when data is received + */ +void +tcp_recv(struct tcp_pcb *pcb, tcp_recv_fn recv) +{ + LWIP_ASSERT_CORE_LOCKED(); + if (pcb != NULL) { + LWIP_ASSERT("invalid socket state for recv callback", pcb->state != LISTEN); + pcb->recv = recv; + } +} + +/** + * @ingroup tcp_raw + * Specifies the callback function that should be called when data has + * successfully been received (i.e., acknowledged) by the remote + * host. The len argument passed to the callback function gives the + * amount bytes that was acknowledged by the last acknowledgment. + * + * @param pcb tcp_pcb to set the sent callback + * @param sent callback function to call for this pcb when data is successfully sent + */ +void +tcp_sent(struct tcp_pcb *pcb, tcp_sent_fn sent) +{ + LWIP_ASSERT_CORE_LOCKED(); + if (pcb != NULL) { + LWIP_ASSERT("invalid socket state for sent callback", pcb->state != LISTEN); + pcb->sent = sent; + } +} + +/** + * @ingroup tcp_raw + * Used to specify the function that should be called when a fatal error + * has occurred on the connection. + * + * If a connection is aborted because of an error, the application is + * alerted of this event by the err callback. Errors that might abort a + * connection are when there is a shortage of memory. The callback + * function to be called is set using the tcp_err() function. + * + * @note The corresponding pcb is already freed when this callback is called! + * + * @param pcb tcp_pcb to set the err callback + * @param err callback function to call for this pcb when a fatal error + * has occurred on the connection + */ +void +tcp_err(struct tcp_pcb *pcb, tcp_err_fn err) +{ + LWIP_ASSERT_CORE_LOCKED(); + if (pcb != NULL) { + LWIP_ASSERT("invalid socket state for err callback", pcb->state != LISTEN); + pcb->errf = err; + } +} + +/** + * @ingroup tcp_raw + * Used for specifying the function that should be called when a + * LISTENing connection has been connected to another host. + * @see MEMP_NUM_TCP_PCB_LISTEN and MEMP_NUM_TCP_PCB + * + * @param pcb tcp_pcb to set the accept callback + * @param accept callback function to call for this pcb when LISTENing + * connection has been connected to another host + */ +void +tcp_accept(struct tcp_pcb *pcb, tcp_accept_fn accept) +{ + LWIP_ASSERT_CORE_LOCKED(); + if ((pcb != NULL) && (pcb->state == LISTEN)) { + struct tcp_pcb_listen *lpcb = (struct tcp_pcb_listen *)pcb; + lpcb->accept = accept; + } +} +#endif /* LWIP_CALLBACK_API */ + + +/** + * @ingroup tcp_raw + * Specifies the polling interval and the callback function that should + * be called to poll the application. The interval is specified in + * number of TCP coarse grained timer shots, which typically occurs + * twice a second. An interval of 10 means that the application would + * be polled every 5 seconds. + * + * When a connection is idle (i.e., no data is either transmitted or + * received), lwIP will repeatedly poll the application by calling a + * specified callback function. This can be used either as a watchdog + * timer for killing connections that have stayed idle for too long, or + * as a method of waiting for memory to become available. For instance, + * if a call to tcp_write() has failed because memory wasn't available, + * the application may use the polling functionality to call tcp_write() + * again when the connection has been idle for a while. + */ +void +tcp_poll(struct tcp_pcb *pcb, tcp_poll_fn poll, u8_t interval) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("tcp_poll: invalid pcb", pcb != NULL, return); + LWIP_ASSERT("invalid socket state for poll", pcb->state != LISTEN); + +#if LWIP_CALLBACK_API + pcb->poll = poll; +#else /* LWIP_CALLBACK_API */ + LWIP_UNUSED_ARG(poll); +#endif /* LWIP_CALLBACK_API */ + pcb->pollinterval = interval; +} + +/** + * Purges a TCP PCB. Removes any buffered data and frees the buffer memory + * (pcb->ooseq, pcb->unsent and pcb->unacked are freed). + * + * @param pcb tcp_pcb to purge. The pcb itself is not deallocated! + */ +void +tcp_pcb_purge(struct tcp_pcb *pcb) +{ + LWIP_ERROR("tcp_pcb_purge: invalid pcb", pcb != NULL, return); + + if (pcb->state != CLOSED && + pcb->state != TIME_WAIT && + pcb->state != LISTEN) { + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge\n")); + + tcp_backlog_accepted(pcb); + + if (pcb->refused_data != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->refused_data\n")); + pbuf_free(pcb->refused_data); + pcb->refused_data = NULL; + } + if (pcb->unsent != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: not all data sent\n")); + } + if (pcb->unacked != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->unacked\n")); + } +#if TCP_QUEUE_OOSEQ + if (pcb->ooseq != NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->ooseq\n")); + tcp_free_ooseq(pcb); + } +#endif /* TCP_QUEUE_OOSEQ */ + + /* Stop the retransmission timer as it will expect data on unacked + queue if it fires */ + pcb->rtime = -1; + + tcp_segs_free(pcb->unsent); + tcp_segs_free(pcb->unacked); + pcb->unacked = pcb->unsent = NULL; +#if TCP_OVERSIZE + pcb->unsent_oversize = 0; +#endif /* TCP_OVERSIZE */ + } +} + +/** + * Purges the PCB and removes it from a PCB list. Any delayed ACKs are sent first. + * + * @param pcblist PCB list to purge. + * @param pcb tcp_pcb to purge. The pcb itself is NOT deallocated! + */ +void +tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb) +{ + LWIP_ASSERT("tcp_pcb_remove: invalid pcb", pcb != NULL); + LWIP_ASSERT("tcp_pcb_remove: invalid pcblist", pcblist != NULL); + + TCP_RMV(pcblist, pcb); + + tcp_pcb_purge(pcb); + + /* if there is an outstanding delayed ACKs, send it */ + if ((pcb->state != TIME_WAIT) && + (pcb->state != LISTEN) && + (pcb->flags & TF_ACK_DELAY)) { + tcp_ack_now(pcb); + tcp_output(pcb); + } + + if (pcb->state != LISTEN) { + LWIP_ASSERT("unsent segments leaking", pcb->unsent == NULL); + LWIP_ASSERT("unacked segments leaking", pcb->unacked == NULL); +#if TCP_QUEUE_OOSEQ + LWIP_ASSERT("ooseq segments leaking", pcb->ooseq == NULL); +#endif /* TCP_QUEUE_OOSEQ */ + } + + pcb->state = CLOSED; + /* reset the local port to prevent the pcb from being 'bound' */ + pcb->local_port = 0; + + LWIP_ASSERT("tcp_pcb_remove: tcp_pcbs_sane()", tcp_pcbs_sane()); +} + +/** + * Calculates a new initial sequence number for new connections. + * + * @return u32_t pseudo random sequence number + */ +u32_t +tcp_next_iss(struct tcp_pcb *pcb) +{ +#ifdef LWIP_HOOK_TCP_ISN + LWIP_ASSERT("tcp_next_iss: invalid pcb", pcb != NULL); + return LWIP_HOOK_TCP_ISN(&pcb->local_ip, pcb->local_port, &pcb->remote_ip, pcb->remote_port); +#else /* LWIP_HOOK_TCP_ISN */ + static u32_t iss = 6510; + + LWIP_ASSERT("tcp_next_iss: invalid pcb", pcb != NULL); + LWIP_UNUSED_ARG(pcb); + + iss += tcp_ticks; /* XXX */ + return iss; +#endif /* LWIP_HOOK_TCP_ISN */ +} + +#if TCP_CALCULATE_EFF_SEND_MSS +/** + * Calculates the effective send mss that can be used for a specific IP address + * by calculating the minimum of TCP_MSS and the mtu (if set) of the target + * netif (if not NULL). + */ +u16_t +tcp_eff_send_mss_netif(u16_t sendmss, struct netif *outif, const ip_addr_t *dest) +{ + u16_t mss_s; + u16_t mtu; + + LWIP_UNUSED_ARG(dest); /* in case IPv6 is disabled */ + + LWIP_ASSERT("tcp_eff_send_mss_netif: invalid dst_ip", dest != NULL); + +#if LWIP_IPV6 +#if LWIP_IPV4 + if (IP_IS_V6(dest)) +#endif /* LWIP_IPV4 */ + { + /* First look in destination cache, to see if there is a Path MTU. */ + mtu = nd6_get_destination_mtu(ip_2_ip6(dest), outif); + } +#if LWIP_IPV4 + else +#endif /* LWIP_IPV4 */ +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 + { + if (outif == NULL) { + return sendmss; + } + mtu = outif->mtu; + } +#endif /* LWIP_IPV4 */ + + if (mtu != 0) { + u16_t offset; +#if LWIP_IPV6 +#if LWIP_IPV4 + if (IP_IS_V6(dest)) +#endif /* LWIP_IPV4 */ + { + offset = IP6_HLEN + TCP_HLEN; + } +#if LWIP_IPV4 + else +#endif /* LWIP_IPV4 */ +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 + { + offset = IP_HLEN + TCP_HLEN; + } +#endif /* LWIP_IPV4 */ + mss_s = (mtu > offset) ? (u16_t)(mtu - offset) : 0; + /* RFC 1122, chap 4.2.2.6: + * Eff.snd.MSS = min(SendMSS+20, MMS_S) - TCPhdrsize - IPoptionsize + * We correct for TCP options in tcp_write(), and don't support IP options. + */ + sendmss = LWIP_MIN(sendmss, mss_s); + } + return sendmss; +} +#endif /* TCP_CALCULATE_EFF_SEND_MSS */ + +/** Helper function for tcp_netif_ip_addr_changed() that iterates a pcb list */ +static void +tcp_netif_ip_addr_changed_pcblist(const ip_addr_t *old_addr, struct tcp_pcb *pcb_list) +{ + struct tcp_pcb *pcb; + pcb = pcb_list; + + LWIP_ASSERT("tcp_netif_ip_addr_changed_pcblist: invalid old_addr", old_addr != NULL); + + while (pcb != NULL) { + /* PCB bound to current local interface address? */ + if (ip_addr_eq(&pcb->local_ip, old_addr) +#if LWIP_AUTOIP + /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */ + && (!IP_IS_V4_VAL(pcb->local_ip) || !ip4_addr_islinklocal(ip_2_ip4(&pcb->local_ip))) +#endif /* LWIP_AUTOIP */ + ) { + /* this connection must be aborted */ + struct tcp_pcb *next = pcb->next; + LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb)); + tcp_abort(pcb); + pcb = next; + } else { + pcb = pcb->next; + } + } +} + +/** This function is called from netif.c when address is changed or netif is removed + * + * @param old_addr IP address of the netif before change + * @param new_addr IP address of the netif after change or NULL if netif has been removed + */ +void +tcp_netif_ip_addr_changed(const ip_addr_t *old_addr, const ip_addr_t *new_addr) +{ + struct tcp_pcb_listen *lpcb; + + if (!ip_addr_isany(old_addr)) { + tcp_netif_ip_addr_changed_pcblist(old_addr, tcp_active_pcbs); + tcp_netif_ip_addr_changed_pcblist(old_addr, tcp_bound_pcbs); + + if (!ip_addr_isany(new_addr)) { + /* PCB bound to current local interface address? */ + for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) { + /* PCB bound to current local interface address? */ + if (ip_addr_eq(&lpcb->local_ip, old_addr)) { + /* The PCB is listening to the old ipaddr and + * is set to listen to the new one instead */ + ip_addr_copy(lpcb->local_ip, *new_addr); + } + } + } + } +} + +const char * +tcp_debug_state_str(enum tcp_state s) +{ + return tcp_state_str[s]; +} + +err_t +tcp_tcp_get_tcp_addrinfo(struct tcp_pcb *pcb, int local, ip_addr_t *addr, u16_t *port) +{ + if (pcb) { + if (local) { + if (addr) { + *addr = pcb->local_ip; + } + if (port) { + *port = pcb->local_port; + } + } else { + if (addr) { + *addr = pcb->remote_ip; + } + if (port) { + *port = pcb->remote_port; + } + } + return ERR_OK; + } + return ERR_VAL; +} + +#if TCP_QUEUE_OOSEQ +/* Free all ooseq pbufs (and possibly reset SACK state) */ +void +tcp_free_ooseq(struct tcp_pcb *pcb) +{ + if (pcb->ooseq) { + tcp_segs_free(pcb->ooseq); + pcb->ooseq = NULL; +#if LWIP_TCP_SACK_OUT + memset(pcb->rcv_sacks, 0, sizeof(pcb->rcv_sacks)); +#endif /* LWIP_TCP_SACK_OUT */ + } +} +#endif /* TCP_QUEUE_OOSEQ */ + +#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG +/** + * Print a tcp header for debugging purposes. + * + * @param tcphdr pointer to a struct tcp_hdr + */ +void +tcp_debug_print(struct tcp_hdr *tcphdr) +{ + LWIP_DEBUGF(TCP_DEBUG, ("TCP header:\n")); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| %5"U16_F" | %5"U16_F" | (src port, dest port)\n", + lwip_ntohs(tcphdr->src), lwip_ntohs(tcphdr->dest))); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| %010"U32_F" | (seq no)\n", + lwip_ntohl(tcphdr->seqno))); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| %010"U32_F" | (ack no)\n", + lwip_ntohl(tcphdr->ackno))); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| %2"U16_F" | |%"U16_F"%"U16_F"%"U16_F"%"U16_F"%"U16_F"%"U16_F"| %5"U16_F" | (hdrlen, flags (", + TCPH_HDRLEN(tcphdr), + (u16_t)(TCPH_FLAGS(tcphdr) >> 5 & 1), + (u16_t)(TCPH_FLAGS(tcphdr) >> 4 & 1), + (u16_t)(TCPH_FLAGS(tcphdr) >> 3 & 1), + (u16_t)(TCPH_FLAGS(tcphdr) >> 2 & 1), + (u16_t)(TCPH_FLAGS(tcphdr) >> 1 & 1), + (u16_t)(TCPH_FLAGS(tcphdr) & 1), + lwip_ntohs(tcphdr->wnd))); + tcp_debug_print_flags(TCPH_FLAGS(tcphdr)); + LWIP_DEBUGF(TCP_DEBUG, ("), win)\n")); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(TCP_DEBUG, ("| 0x%04"X16_F" | %5"U16_F" | (chksum, urgp)\n", + lwip_ntohs(tcphdr->chksum), lwip_ntohs(tcphdr->urgp))); + LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); +} + +/** + * Print a tcp state for debugging purposes. + * + * @param s enum tcp_state to print + */ +void +tcp_debug_print_state(enum tcp_state s) +{ + LWIP_DEBUGF(TCP_DEBUG, ("State: %s\n", tcp_state_str[s])); +} + +/** + * Print tcp flags for debugging purposes. + * + * @param flags tcp flags, all active flags are printed + */ +void +tcp_debug_print_flags(u8_t flags) +{ + if (flags & TCP_FIN) { + LWIP_DEBUGF(TCP_DEBUG, ("FIN ")); + } + if (flags & TCP_SYN) { + LWIP_DEBUGF(TCP_DEBUG, ("SYN ")); + } + if (flags & TCP_RST) { + LWIP_DEBUGF(TCP_DEBUG, ("RST ")); + } + if (flags & TCP_PSH) { + LWIP_DEBUGF(TCP_DEBUG, ("PSH ")); + } + if (flags & TCP_ACK) { + LWIP_DEBUGF(TCP_DEBUG, ("ACK ")); + } + if (flags & TCP_URG) { + LWIP_DEBUGF(TCP_DEBUG, ("URG ")); + } + if (flags & TCP_ECE) { + LWIP_DEBUGF(TCP_DEBUG, ("ECE ")); + } + if (flags & TCP_CWR) { + LWIP_DEBUGF(TCP_DEBUG, ("CWR ")); + } + LWIP_DEBUGF(TCP_DEBUG, ("\n")); +} + +/** + * Print all tcp_pcbs in every list for debugging purposes. + */ +void +tcp_debug_print_pcbs(void) +{ + struct tcp_pcb *pcb; + struct tcp_pcb_listen *pcbl; + + LWIP_DEBUGF(TCP_DEBUG, ("Active PCB states:\n")); + for (pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F", foreign port %"U16_F" snd_nxt %"U32_F" rcv_nxt %"U32_F" ", + pcb->local_port, pcb->remote_port, + pcb->snd_nxt, pcb->rcv_nxt)); + tcp_debug_print_state(pcb->state); + } + + LWIP_DEBUGF(TCP_DEBUG, ("Listen PCB states:\n")); + for (pcbl = tcp_listen_pcbs.listen_pcbs; pcbl != NULL; pcbl = pcbl->next) { + LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F" ", pcbl->local_port)); + tcp_debug_print_state(pcbl->state); + } + + LWIP_DEBUGF(TCP_DEBUG, ("TIME-WAIT PCB states:\n")); + for (pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F", foreign port %"U16_F" snd_nxt %"U32_F" rcv_nxt %"U32_F" ", + pcb->local_port, pcb->remote_port, + pcb->snd_nxt, pcb->rcv_nxt)); + tcp_debug_print_state(pcb->state); + } +} + +/** + * Check state consistency of the tcp_pcb lists. + */ +s16_t +tcp_pcbs_sane(void) +{ + struct tcp_pcb *pcb; + for (pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != CLOSED", pcb->state != CLOSED); + LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != LISTEN", pcb->state != LISTEN); + LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT); + } + for (pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_ASSERT("tcp_pcbs_sane: tw pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); + } + return 1; +} +#endif /* TCP_DEBUG */ + +#if LWIP_TCP_PCB_NUM_EXT_ARGS +/** + * @defgroup tcp_raw_extargs ext arguments + * @ingroup tcp_raw + * Additional data storage per tcp pcb<br> + * @see @ref tcp_raw + * + * When LWIP_TCP_PCB_NUM_EXT_ARGS is > 0, every tcp pcb (including listen pcb) + * includes a number of additional argument entries in an array. + * + * To support memory management, in addition to a 'void *', callbacks can be + * provided to manage transition from listening pcbs to connections and to + * deallocate memory when a pcb is deallocated (see struct @ref tcp_ext_arg_callbacks). + * + * After allocating this index, use @ref tcp_ext_arg_set and @ref tcp_ext_arg_get + * to store and load arguments from this index for a given pcb. + */ + +static u8_t tcp_ext_arg_id; + +/** + * @ingroup tcp_raw_extargs + * Allocate an index to store data in ext_args member of struct tcp_pcb. + * Returned value is an index in mentioned array. + * The index is *global* over all pcbs! + * + * When @ref LWIP_TCP_PCB_NUM_EXT_ARGS is > 0, every tcp pcb (including listen pcb) + * includes a number of additional argument entries in an array. + * + * To support memory management, in addition to a 'void *', callbacks can be + * provided to manage transition from listening pcbs to connections and to + * deallocate memory when a pcb is deallocated (see struct @ref tcp_ext_arg_callbacks). + * + * After allocating this index, use @ref tcp_ext_arg_set and @ref tcp_ext_arg_get + * to store and load arguments from this index for a given pcb. + * + * @return a unique index into struct tcp_pcb.ext_args + */ +u8_t +tcp_ext_arg_alloc_id(void) +{ + u8_t result = tcp_ext_arg_id; + tcp_ext_arg_id++; + + LWIP_ASSERT_CORE_LOCKED(); + +#if LWIP_TCP_PCB_NUM_EXT_ARGS >= 255 +#error LWIP_TCP_PCB_NUM_EXT_ARGS +#endif + LWIP_ASSERT("Increase LWIP_TCP_PCB_NUM_EXT_ARGS in lwipopts.h", result < LWIP_TCP_PCB_NUM_EXT_ARGS); + return result; +} + +/** + * @ingroup tcp_raw_extargs + * Set callbacks for a given index of ext_args on the specified pcb. + * + * @param pcb tcp_pcb for which to set the callback + * @param id ext_args index to set (allocated via @ref tcp_ext_arg_alloc_id) + * @param callbacks callback table (const since it is referenced, not copied!) + */ +void +tcp_ext_arg_set_callbacks(struct tcp_pcb *pcb, u8_t id, const struct tcp_ext_arg_callbacks * const callbacks) +{ + LWIP_ASSERT("pcb != NULL", pcb != NULL); + LWIP_ASSERT("id < LWIP_TCP_PCB_NUM_EXT_ARGS", id < LWIP_TCP_PCB_NUM_EXT_ARGS); + LWIP_ASSERT("callbacks != NULL", callbacks != NULL); + + LWIP_ASSERT_CORE_LOCKED(); + + pcb->ext_args[id].callbacks = callbacks; +} + +/** + * @ingroup tcp_raw_extargs + * Set data for a given index of ext_args on the specified pcb. + * + * @param pcb tcp_pcb for which to set the data + * @param id ext_args index to set (allocated via @ref tcp_ext_arg_alloc_id) + * @param arg data pointer to set + */ +void tcp_ext_arg_set(struct tcp_pcb *pcb, u8_t id, void *arg) +{ + LWIP_ASSERT("pcb != NULL", pcb != NULL); + LWIP_ASSERT("id < LWIP_TCP_PCB_NUM_EXT_ARGS", id < LWIP_TCP_PCB_NUM_EXT_ARGS); + + LWIP_ASSERT_CORE_LOCKED(); + + pcb->ext_args[id].data = arg; +} + +/** + * @ingroup tcp_raw_extargs + * Set data for a given index of ext_args on the specified pcb. + * + * @param pcb tcp_pcb for which to set the data + * @param id ext_args index to set (allocated via @ref tcp_ext_arg_alloc_id) + * @return data pointer at the given index + */ +void *tcp_ext_arg_get(const struct tcp_pcb *pcb, u8_t id) +{ + LWIP_ASSERT("pcb != NULL", pcb != NULL); + LWIP_ASSERT("id < LWIP_TCP_PCB_NUM_EXT_ARGS", id < LWIP_TCP_PCB_NUM_EXT_ARGS); + + LWIP_ASSERT_CORE_LOCKED(); + + return pcb->ext_args[id].data; +} + +/** This function calls the "destroy" callback for all ext_args once a pcb is + * freed. + */ +static void +tcp_ext_arg_invoke_callbacks_destroyed(struct tcp_pcb_ext_args *ext_args) +{ + int i; + LWIP_ASSERT("ext_args != NULL", ext_args != NULL); + + for (i = 0; i < LWIP_TCP_PCB_NUM_EXT_ARGS; i++) { + if (ext_args[i].callbacks != NULL) { + if (ext_args[i].callbacks->destroy != NULL) { + ext_args[i].callbacks->destroy((u8_t)i, ext_args[i].data); + } + } + } +} + +/** This function calls the "passive_open" callback for all ext_args if a connection + * is in the process of being accepted. This is called just after the SYN is + * received and before a SYN/ACK is sent, to allow to modify the very first + * segment sent even on passive open. Naturally, the "accepted" callback of the + * pcb has not been called yet! + */ +err_t +tcp_ext_arg_invoke_callbacks_passive_open(struct tcp_pcb_listen *lpcb, struct tcp_pcb *cpcb) +{ + int i; + LWIP_ASSERT("lpcb != NULL", lpcb != NULL); + LWIP_ASSERT("cpcb != NULL", cpcb != NULL); + + for (i = 0; i < LWIP_TCP_PCB_NUM_EXT_ARGS; i++) { + if (lpcb->ext_args[i].callbacks != NULL) { + if (lpcb->ext_args[i].callbacks->passive_open != NULL) { + err_t err = lpcb->ext_args[i].callbacks->passive_open((u8_t)i, lpcb, cpcb); + if (err != ERR_OK) { + return err; + } + } + } + } + return ERR_OK; +} +#endif /* LWIP_TCP_PCB_NUM_EXT_ARGS */ + +#endif /* LWIP_TCP */ diff --git a/lib/lwip/core/tcp_in.c b/lib/lwip/core/tcp_in.c new file mode 100644 index 0000000000..c7a1f7b732 --- /dev/null +++ b/lib/lwip/core/tcp_in.c @@ -0,0 +1,2184 @@ +/** + * @file + * Transmission Control Protocol, incoming traffic + * + * The input processing functions of the TCP layer. + * + * These functions are generally called in the order (ip_input() ->) + * tcp_input() -> * tcp_process() -> tcp_receive() (-> application). + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/priv/tcp_priv.h" +#include "lwip/def.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/inet_chksum.h" +#include "lwip/stats.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#if LWIP_ND6_TCP_REACHABILITY_HINTS +#include "lwip/nd6.h" +#endif /* LWIP_ND6_TCP_REACHABILITY_HINTS */ + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +/** Initial CWND calculation as defined RFC 2581 */ +#define LWIP_TCP_CALC_INITIAL_CWND(mss) ((tcpwnd_size_t)LWIP_MIN((4U * (mss)), LWIP_MAX((2U * (mss)), 4380U))) + +/* These variables are global to all functions involved in the input + processing of TCP segments. They are set by the tcp_input() + function. */ +static struct tcp_seg inseg; +static struct tcp_hdr *tcphdr; +static u16_t tcphdr_optlen; +static u16_t tcphdr_opt1len; +static u8_t *tcphdr_opt2; +static u16_t tcp_optidx; +static u32_t seqno, ackno; +static tcpwnd_size_t recv_acked; +static u16_t tcplen; +static u8_t flags; + +static u8_t recv_flags; +static struct pbuf *recv_data; + +struct tcp_pcb *tcp_input_pcb; + +/* Forward declarations. */ +static err_t tcp_process(struct tcp_pcb *pcb); +static void tcp_receive(struct tcp_pcb *pcb); +static void tcp_parseopt(struct tcp_pcb *pcb); + +static void tcp_listen_input(struct tcp_pcb_listen *pcb); +static void tcp_timewait_input(struct tcp_pcb *pcb); + +static int tcp_input_delayed_close(struct tcp_pcb *pcb); + +#if LWIP_TCP_SACK_OUT +static void tcp_add_sack(struct tcp_pcb *pcb, u32_t left, u32_t right); +static void tcp_remove_sacks_lt(struct tcp_pcb *pcb, u32_t seq); +#if defined(TCP_OOSEQ_BYTES_LIMIT) || defined(TCP_OOSEQ_PBUFS_LIMIT) +static void tcp_remove_sacks_gt(struct tcp_pcb *pcb, u32_t seq); +#endif /* TCP_OOSEQ_BYTES_LIMIT || TCP_OOSEQ_PBUFS_LIMIT */ +#endif /* LWIP_TCP_SACK_OUT */ + +/** + * The initial input processing of TCP. It verifies the TCP header, demultiplexes + * the segment between the PCBs and passes it on to tcp_process(), which implements + * the TCP finite state machine. This function is called by the IP layer (in + * ip_input()). + * + * @param p received TCP segment to process (p->payload pointing to the TCP header) + * @param inp network interface on which this segment was received + */ +void +tcp_input(struct pbuf *p, struct netif *inp) +{ + struct tcp_pcb *pcb, *prev; + struct tcp_pcb_listen *lpcb; +#if SO_REUSE + struct tcp_pcb *lpcb_prev = NULL; + struct tcp_pcb_listen *lpcb_any = NULL; +#endif /* SO_REUSE */ + u8_t hdrlen_bytes; + err_t err; + + LWIP_UNUSED_ARG(inp); + LWIP_ASSERT_CORE_LOCKED(); + LWIP_ASSERT("tcp_input: invalid pbuf", p != NULL); + + PERF_START; + + TCP_STATS_INC(tcp.recv); + MIB2_STATS_INC(mib2.tcpinsegs); + + tcphdr = (struct tcp_hdr *)p->payload; + +#if TCP_INPUT_DEBUG + tcp_debug_print(tcphdr); +#endif + + /* Check that TCP header fits in payload */ + if (p->len < TCP_HLEN) { + /* drop short packets */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: short packet (%"U16_F" bytes) discarded\n", p->tot_len)); + TCP_STATS_INC(tcp.lenerr); + goto dropped; + } + + /* Don't even process incoming broadcasts/multicasts. */ + if (ip_addr_isbroadcast(ip_current_dest_addr(), ip_current_netif()) || + ip_addr_ismulticast(ip_current_dest_addr())) { + TCP_STATS_INC(tcp.proterr); + goto dropped; + } + +#if CHECKSUM_CHECK_TCP + IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_CHECK_TCP) { + /* Verify TCP checksum. */ + u16_t chksum = ip_chksum_pseudo(p, IP_PROTO_TCP, p->tot_len, + ip_current_src_addr(), ip_current_dest_addr()); + if (chksum != 0) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packet discarded due to failing checksum 0x%04"X16_F"\n", + chksum)); + tcp_debug_print(tcphdr); + TCP_STATS_INC(tcp.chkerr); + goto dropped; + } + } +#endif /* CHECKSUM_CHECK_TCP */ + + /* sanity-check header length */ + hdrlen_bytes = TCPH_HDRLEN_BYTES(tcphdr); + if ((hdrlen_bytes < TCP_HLEN) || (hdrlen_bytes > p->tot_len)) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: invalid header length (%"U16_F")\n", (u16_t)hdrlen_bytes)); + TCP_STATS_INC(tcp.lenerr); + goto dropped; + } + + /* Move the payload pointer in the pbuf so that it points to the + TCP data instead of the TCP header. */ + tcphdr_optlen = (u16_t)(hdrlen_bytes - TCP_HLEN); + tcphdr_opt2 = NULL; + if (p->len >= hdrlen_bytes) { + /* all options are in the first pbuf */ + tcphdr_opt1len = tcphdr_optlen; + pbuf_remove_header(p, hdrlen_bytes); /* cannot fail */ + } else { + u16_t opt2len; + /* TCP header fits into first pbuf, options don't - data is in the next pbuf */ + /* there must be a next pbuf, due to hdrlen_bytes sanity check above */ + LWIP_ASSERT("p->next != NULL", p->next != NULL); + + /* advance over the TCP header (cannot fail) */ + pbuf_remove_header(p, TCP_HLEN); + + /* determine how long the first and second parts of the options are */ + tcphdr_opt1len = p->len; + opt2len = (u16_t)(tcphdr_optlen - tcphdr_opt1len); + + /* options continue in the next pbuf: set p to zero length and hide the + options in the next pbuf (adjusting p->tot_len) */ + pbuf_remove_header(p, tcphdr_opt1len); + + /* check that the options fit in the second pbuf */ + if (opt2len > p->next->len) { + /* drop short packets */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: options overflow second pbuf (%"U16_F" bytes)\n", p->next->len)); + TCP_STATS_INC(tcp.lenerr); + goto dropped; + } + + /* remember the pointer to the second part of the options */ + tcphdr_opt2 = (u8_t *)p->next->payload; + + /* advance p->next to point after the options, and manually + adjust p->tot_len to keep it consistent with the changed p->next */ + pbuf_remove_header(p->next, opt2len); + p->tot_len = (u16_t)(p->tot_len - opt2len); + + LWIP_ASSERT("p->len == 0", p->len == 0); + LWIP_ASSERT("p->tot_len == p->next->tot_len", p->tot_len == p->next->tot_len); + } + + /* Convert fields in TCP header to host byte order. */ + tcphdr->src = lwip_ntohs(tcphdr->src); + tcphdr->dest = lwip_ntohs(tcphdr->dest); + seqno = tcphdr->seqno = lwip_ntohl(tcphdr->seqno); + ackno = tcphdr->ackno = lwip_ntohl(tcphdr->ackno); + tcphdr->wnd = lwip_ntohs(tcphdr->wnd); + + flags = TCPH_FLAGS(tcphdr); + tcplen = p->tot_len; + if (flags & (TCP_FIN | TCP_SYN)) { + tcplen++; + if (tcplen < p->tot_len) { + /* u16_t overflow, cannot handle this */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: length u16_t overflow, cannot handle this\n")); + TCP_STATS_INC(tcp.lenerr); + goto dropped; + } + } + + /* Demultiplex an incoming segment. First, we check if it is destined + for an active connection. */ + prev = NULL; + + for (pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_ASSERT("tcp_input: active pcb->state != CLOSED", pcb->state != CLOSED); + LWIP_ASSERT("tcp_input: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT); + LWIP_ASSERT("tcp_input: active pcb->state != LISTEN", pcb->state != LISTEN); + + /* check if PCB is bound to specific netif */ + if ((pcb->netif_idx != NETIF_NO_INDEX) && + (pcb->netif_idx != netif_get_index(ip_data.current_input_netif))) { + prev = pcb; + continue; + } + + if (pcb->remote_port == tcphdr->src && + pcb->local_port == tcphdr->dest && + ip_addr_eq(&pcb->remote_ip, ip_current_src_addr()) && + ip_addr_eq(&pcb->local_ip, ip_current_dest_addr())) { + /* Move this PCB to the front of the list so that subsequent + lookups will be faster (we exploit locality in TCP segment + arrivals). */ + LWIP_ASSERT("tcp_input: pcb->next != pcb (before cache)", pcb->next != pcb); + if (prev != NULL) { + prev->next = pcb->next; + pcb->next = tcp_active_pcbs; + tcp_active_pcbs = pcb; + } else { + TCP_STATS_INC(tcp.cachehit); + } + LWIP_ASSERT("tcp_input: pcb->next != pcb (after cache)", pcb->next != pcb); + break; + } + prev = pcb; + } + + if (pcb == NULL) { + /* If it did not go to an active connection, we check the connections + in the TIME-WAIT state. */ + for (pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) { + LWIP_ASSERT("tcp_input: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT); + + /* check if PCB is bound to specific netif */ + if ((pcb->netif_idx != NETIF_NO_INDEX) && + (pcb->netif_idx != netif_get_index(ip_data.current_input_netif))) { + continue; + } + + if (pcb->remote_port == tcphdr->src && + pcb->local_port == tcphdr->dest && + ip_addr_eq(&pcb->remote_ip, ip_current_src_addr()) && + ip_addr_eq(&pcb->local_ip, ip_current_dest_addr())) { + /* We don't really care enough to move this PCB to the front + of the list since we are not very likely to receive that + many segments for connections in TIME-WAIT. */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packed for TIME_WAITing connection.\n")); +#ifdef LWIP_HOOK_TCP_INPACKET_PCB + if (LWIP_HOOK_TCP_INPACKET_PCB(pcb, tcphdr, tcphdr_optlen, tcphdr_opt1len, + tcphdr_opt2, p) == ERR_OK) +#endif + { + tcp_timewait_input(pcb); + } + pbuf_free(p); + return; + } + } + + /* Finally, if we still did not get a match, we check all PCBs that + are LISTENing for incoming connections. */ + prev = NULL; + for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) { + /* check if PCB is bound to specific netif */ + if ((lpcb->netif_idx != NETIF_NO_INDEX) && + (lpcb->netif_idx != netif_get_index(ip_data.current_input_netif))) { + prev = (struct tcp_pcb *)lpcb; + continue; + } + + if (lpcb->local_port == tcphdr->dest) { + if (IP_IS_ANY_TYPE_VAL(lpcb->local_ip)) { + /* found an ANY TYPE (IPv4/IPv6) match */ +#if SO_REUSE + lpcb_any = lpcb; + lpcb_prev = prev; +#else /* SO_REUSE */ + break; +#endif /* SO_REUSE */ + } else if (IP_ADDR_PCB_VERSION_MATCH_EXACT(lpcb, ip_current_dest_addr())) { + if (ip_addr_eq(&lpcb->local_ip, ip_current_dest_addr())) { + /* found an exact match */ + break; + } else if (ip_addr_isany(&lpcb->local_ip)) { + /* found an ANY-match */ +#if SO_REUSE + lpcb_any = lpcb; + lpcb_prev = prev; +#else /* SO_REUSE */ + break; +#endif /* SO_REUSE */ + } + } + } + prev = (struct tcp_pcb *)lpcb; + } +#if SO_REUSE + /* first try specific local IP */ + if (lpcb == NULL) { + /* only pass to ANY if no specific local IP has been found */ + lpcb = lpcb_any; + prev = lpcb_prev; + } +#endif /* SO_REUSE */ + if (lpcb != NULL) { + /* Move this PCB to the front of the list so that subsequent + lookups will be faster (we exploit locality in TCP segment + arrivals). */ + if (prev != NULL) { + ((struct tcp_pcb_listen *)prev)->next = lpcb->next; + /* our successor is the remainder of the listening list */ + lpcb->next = tcp_listen_pcbs.listen_pcbs; + /* put this listening pcb at the head of the listening list */ + tcp_listen_pcbs.listen_pcbs = lpcb; + } else { + TCP_STATS_INC(tcp.cachehit); + } + + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packed for LISTENing connection.\n")); +#ifdef LWIP_HOOK_TCP_INPACKET_PCB + if (LWIP_HOOK_TCP_INPACKET_PCB((struct tcp_pcb *)lpcb, tcphdr, tcphdr_optlen, + tcphdr_opt1len, tcphdr_opt2, p) == ERR_OK) +#endif + { + tcp_listen_input(lpcb); + } + pbuf_free(p); + return; + } + } + +#if TCP_INPUT_DEBUG + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ")); + tcp_debug_print_flags(TCPH_FLAGS(tcphdr)); + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n")); +#endif /* TCP_INPUT_DEBUG */ + + +#ifdef LWIP_HOOK_TCP_INPACKET_PCB + if ((pcb != NULL) && LWIP_HOOK_TCP_INPACKET_PCB(pcb, tcphdr, tcphdr_optlen, + tcphdr_opt1len, tcphdr_opt2, p) != ERR_OK) { + pbuf_free(p); + return; + } +#endif + if (pcb != NULL) { + /* The incoming segment belongs to a connection. */ +#if TCP_INPUT_DEBUG + tcp_debug_print_state(pcb->state); +#endif /* TCP_INPUT_DEBUG */ + + /* Set up a tcp_seg structure. */ + inseg.next = NULL; + inseg.len = p->tot_len; + inseg.p = p; + inseg.tcphdr = tcphdr; + + recv_data = NULL; + recv_flags = 0; + recv_acked = 0; + + if (flags & TCP_PSH) { + p->flags |= PBUF_FLAG_PUSH; + } + + /* If there is data which was previously "refused" by upper layer */ + if (pcb->refused_data != NULL) { + if ((tcp_process_refused_data(pcb) == ERR_ABRT) || + ((pcb->refused_data != NULL) && (tcplen > 0))) { + /* pcb has been aborted or refused data is still refused and the new + segment contains data */ + if (pcb->rcv_ann_wnd == 0) { + /* this is a zero-window probe, we respond to it with current RCV.NXT + and drop the data segment */ + tcp_send_empty_ack(pcb); + } + TCP_STATS_INC(tcp.drop); + MIB2_STATS_INC(mib2.tcpinerrs); + goto aborted; + } + } + tcp_input_pcb = pcb; + err = tcp_process(pcb); + /* A return value of ERR_ABRT means that tcp_abort() was called + and that the pcb has been freed. If so, we don't do anything. */ + if (err != ERR_ABRT) { + if (recv_flags & TF_RESET) { + /* TF_RESET means that the connection was reset by the other + end. We then call the error callback to inform the + application that the connection is dead before we + deallocate the PCB. */ + TCP_EVENT_ERR(pcb->state, pcb->errf, pcb->callback_arg, ERR_RST); + tcp_pcb_remove(&tcp_active_pcbs, pcb); + tcp_free(pcb); + } else { + err = ERR_OK; + /* If the application has registered a "sent" function to be + called when new send buffer space is available, we call it + now. */ + if (recv_acked > 0) { + u16_t acked16; +#if LWIP_WND_SCALE + /* recv_acked is u32_t but the sent callback only takes a u16_t, + so we might have to call it multiple times. */ + u32_t acked = recv_acked; + while (acked > 0) { + acked16 = (u16_t)LWIP_MIN(acked, 0xffffu); + acked -= acked16; +#else + { + acked16 = recv_acked; +#endif + TCP_EVENT_SENT(pcb, (u16_t)acked16, err); + if (err == ERR_ABRT) { + goto aborted; + } + } + recv_acked = 0; + } + if (tcp_input_delayed_close(pcb)) { + goto aborted; + } +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + while (recv_data != NULL) { + struct pbuf *rest = NULL; + pbuf_split_64k(recv_data, &rest); +#else /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + if (recv_data != NULL) { +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + + LWIP_ASSERT("pcb->refused_data == NULL", pcb->refused_data == NULL); + if (pcb->flags & TF_RXCLOSED) { + /* received data although already closed -> abort (send RST) to + notify the remote host that not all data has been processed */ + pbuf_free(recv_data); +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + if (rest != NULL) { + pbuf_free(rest); + } +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + tcp_abort(pcb); + goto aborted; + } + + /* Notify application that data has been received. */ + TCP_EVENT_RECV(pcb, recv_data, ERR_OK, err); + if (err == ERR_ABRT) { +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + if (rest != NULL) { + pbuf_free(rest); + } +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + goto aborted; + } + + /* If the upper layer can't receive this data, store it */ + if (err != ERR_OK) { +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + if (rest != NULL) { + pbuf_cat(recv_data, rest); + } +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + pcb->refused_data = recv_data; + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: keep incoming packet, because pcb is "full"\n")); +#if TCP_QUEUE_OOSEQ && LWIP_WND_SCALE + break; + } else { + /* Upper layer received the data, go on with the rest if > 64K */ + recv_data = rest; +#endif /* TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + } + } + + /* If a FIN segment was received, we call the callback + function with a NULL buffer to indicate EOF. */ + if (recv_flags & TF_GOT_FIN) { + if (pcb->refused_data != NULL) { + /* Delay this if we have refused data. */ + pcb->refused_data->flags |= PBUF_FLAG_TCP_FIN; + } else { + /* correct rcv_wnd as the application won't call tcp_recved() + for the FIN's seqno */ + if (pcb->rcv_wnd != TCP_WND_MAX(pcb)) { + pcb->rcv_wnd++; + } + TCP_EVENT_CLOSED(pcb, err); + if (err == ERR_ABRT) { + goto aborted; + } + } + } + + tcp_input_pcb = NULL; + if (tcp_input_delayed_close(pcb)) { + goto aborted; + } + /* Try to send something out. */ + tcp_output(pcb); +#if TCP_INPUT_DEBUG +#if TCP_DEBUG + tcp_debug_print_state(pcb->state); +#endif /* TCP_DEBUG */ +#endif /* TCP_INPUT_DEBUG */ + } + } + /* Jump target if pcb has been aborted in a callback (by calling tcp_abort()). + Below this line, 'pcb' may not be dereferenced! */ +aborted: + tcp_input_pcb = NULL; + recv_data = NULL; + + /* give up our reference to inseg.p */ + if (inseg.p != NULL) { + pbuf_free(inseg.p); + inseg.p = NULL; + } + } else { + /* If no matching PCB was found, send a TCP RST (reset) to the + sender. */ + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_input: no PCB match found, resetting.\n")); + if (!(TCPH_FLAGS(tcphdr) & TCP_RST)) { + TCP_STATS_INC(tcp.proterr); + TCP_STATS_INC(tcp.drop); + tcp_rst_netif(ip_data.current_input_netif, ackno, seqno + tcplen, ip_current_dest_addr(), + ip_current_src_addr(), tcphdr->dest, tcphdr->src); + } + pbuf_free(p); + } + + LWIP_ASSERT("tcp_input: tcp_pcbs_sane()", tcp_pcbs_sane()); + PERF_STOP("tcp_input"); + return; +dropped: + TCP_STATS_INC(tcp.drop); + MIB2_STATS_INC(mib2.tcpinerrs); + pbuf_free(p); +} + +/** Called from tcp_input to check for TF_CLOSED flag. This results in closing + * and deallocating a pcb at the correct place to ensure no one references it + * any more. + * @returns 1 if the pcb has been closed and deallocated, 0 otherwise + */ +static int +tcp_input_delayed_close(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("tcp_input_delayed_close: invalid pcb", pcb != NULL); + + if (recv_flags & TF_CLOSED) { + /* The connection has been closed and we will deallocate the + PCB. */ + if (!(pcb->flags & TF_RXCLOSED)) { + /* Connection closed although the application has only shut down the + tx side: call the PCB's err callback and indicate the closure to + ensure the application doesn't continue using the PCB. */ + TCP_EVENT_ERR(pcb->state, pcb->errf, pcb->callback_arg, ERR_CLSD); + } + tcp_pcb_remove(&tcp_active_pcbs, pcb); + tcp_free(pcb); + return 1; + } + return 0; +} + +/** + * Called by tcp_input() when a segment arrives for a listening + * connection (from tcp_input()). + * + * @param pcb the tcp_pcb_listen for which a segment arrived + * + * @note the segment which arrived is saved in global variables, therefore only the pcb + * involved is passed as a parameter to this function + */ +static void +tcp_listen_input(struct tcp_pcb_listen *pcb) +{ + struct tcp_pcb *npcb; + u32_t iss; + err_t rc; + + if (flags & TCP_RST) { + /* An incoming RST should be ignored. Return. */ + return; + } + + LWIP_ASSERT("tcp_listen_input: invalid pcb", pcb != NULL); + + /* In the LISTEN state, we check for incoming SYN segments, + creates a new PCB, and responds with a SYN|ACK. */ + if (flags & TCP_ACK) { + /* For incoming segments with the ACK flag set, respond with a + RST. */ + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_listen_input: ACK in LISTEN, sending reset\n")); + tcp_rst_netif(ip_data.current_input_netif, ackno, seqno + tcplen, ip_current_dest_addr(), + ip_current_src_addr(), tcphdr->dest, tcphdr->src); + } else if (flags & TCP_SYN) { + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection request %"U16_F" -> %"U16_F".\n", tcphdr->src, tcphdr->dest)); +#if TCP_LISTEN_BACKLOG + if (pcb->accepts_pending >= pcb->backlog) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_listen_input: listen backlog exceeded for port %"U16_F"\n", tcphdr->dest)); + return; + } +#endif /* TCP_LISTEN_BACKLOG */ + npcb = tcp_alloc(pcb->prio); + /* If a new PCB could not be created (probably due to lack of memory), + we don't do anything, but rely on the sender will retransmit the + SYN at a time when we have more memory available. */ + if (npcb == NULL) { + err_t err; + LWIP_DEBUGF(TCP_DEBUG, ("tcp_listen_input: could not allocate PCB\n")); + TCP_STATS_INC(tcp.memerr); + TCP_EVENT_ACCEPT(pcb, NULL, pcb->callback_arg, ERR_MEM, err); + LWIP_UNUSED_ARG(err); /* err not useful here */ + return; + } +#if TCP_LISTEN_BACKLOG + pcb->accepts_pending++; + tcp_set_flags(npcb, TF_BACKLOGPEND); +#endif /* TCP_LISTEN_BACKLOG */ + /* Set up the new PCB. */ + ip_addr_copy(npcb->local_ip, *ip_current_dest_addr()); + ip_addr_copy(npcb->remote_ip, *ip_current_src_addr()); + npcb->local_port = pcb->local_port; + npcb->remote_port = tcphdr->src; + npcb->state = SYN_RCVD; + npcb->rcv_nxt = seqno + 1; + npcb->rcv_ann_right_edge = npcb->rcv_nxt; + iss = tcp_next_iss(npcb); + npcb->snd_wl2 = iss; + npcb->snd_nxt = iss; + npcb->lastack = iss; + npcb->snd_lbb = iss; + npcb->snd_wl1 = seqno - 1;/* initialise to seqno-1 to force window update */ + npcb->callback_arg = pcb->callback_arg; +#if LWIP_CALLBACK_API || TCP_LISTEN_BACKLOG + npcb->listener = pcb; +#endif /* LWIP_CALLBACK_API || TCP_LISTEN_BACKLOG */ +#if LWIP_VLAN_PCP + npcb->netif_hints.tci = pcb->netif_hints.tci; +#endif /* LWIP_VLAN_PCP */ + /* inherit socket options */ + npcb->so_options = pcb->so_options & SOF_INHERITED; + npcb->netif_idx = pcb->netif_idx; + /* Register the new PCB so that we can begin receiving segments + for it. */ + TCP_REG_ACTIVE(npcb); + + /* Parse any options in the SYN. */ + tcp_parseopt(npcb); + npcb->snd_wnd = tcphdr->wnd; + npcb->snd_wnd_max = npcb->snd_wnd; + +#if TCP_CALCULATE_EFF_SEND_MSS + npcb->mss = tcp_eff_send_mss(npcb->mss, &npcb->local_ip, &npcb->remote_ip); +#endif /* TCP_CALCULATE_EFF_SEND_MSS */ + + MIB2_STATS_INC(mib2.tcppassiveopens); + +#if LWIP_TCP_PCB_NUM_EXT_ARGS + if (tcp_ext_arg_invoke_callbacks_passive_open(pcb, npcb) != ERR_OK) { + tcp_abandon(npcb, 0); + return; + } +#endif + + /* Send a SYN|ACK together with the MSS option. */ + rc = tcp_enqueue_flags(npcb, TCP_SYN | TCP_ACK); + if (rc != ERR_OK) { + tcp_abandon(npcb, 0); + return; + } + tcp_output(npcb); + } + return; +} + +/** + * Called by tcp_input() when a segment arrives for a connection in + * TIME_WAIT. + * + * @param pcb the tcp_pcb for which a segment arrived + * + * @note the segment which arrived is saved in global variables, therefore only the pcb + * involved is passed as a parameter to this function + */ +static void +tcp_timewait_input(struct tcp_pcb *pcb) +{ + /* RFC 1337: in TIME_WAIT, ignore RST and ACK FINs + any 'acceptable' segments */ + /* RFC 793 3.9 Event Processing - Segment Arrives: + * - first check sequence number - we skip that one in TIME_WAIT (always + * acceptable since we only send ACKs) + * - second check the RST bit (... return) */ + if (flags & TCP_RST) { + return; + } + + LWIP_ASSERT("tcp_timewait_input: invalid pcb", pcb != NULL); + + /* - fourth, check the SYN bit, */ + if (flags & TCP_SYN) { + /* If an incoming segment is not acceptable, an acknowledgment + should be sent in reply */ + if (TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt, pcb->rcv_nxt + pcb->rcv_wnd)) { + /* If the SYN is in the window it is an error, send a reset */ + tcp_rst(pcb, ackno, seqno + tcplen, ip_current_dest_addr(), + ip_current_src_addr(), tcphdr->dest, tcphdr->src); + return; + } + } else if (flags & TCP_FIN) { + /* - eighth, check the FIN bit: Remain in the TIME-WAIT state. + Restart the 2 MSL time-wait timeout.*/ + pcb->tmr = tcp_ticks; + } + + if ((tcplen > 0)) { + /* Acknowledge data, FIN or out-of-window SYN */ + tcp_ack_now(pcb); + tcp_output(pcb); + } + return; +} + +/** + * Implements the TCP state machine. Called by tcp_input. In some + * states tcp_receive() is called to receive data. The tcp_seg + * argument will be freed by the caller (tcp_input()) unless the + * recv_data pointer in the pcb is set. + * + * @param pcb the tcp_pcb for which a segment arrived + * + * @note the segment which arrived is saved in global variables, therefore only the pcb + * involved is passed as a parameter to this function + */ +static err_t +tcp_process(struct tcp_pcb *pcb) +{ + struct tcp_seg *rseg; + u8_t acceptable = 0; + err_t err; + + err = ERR_OK; + + LWIP_ASSERT("tcp_process: invalid pcb", pcb != NULL); + + /* Process incoming RST segments. */ + if (flags & TCP_RST) { + /* First, determine if the reset is acceptable. */ + if (pcb->state == SYN_SENT) { + /* "In the SYN-SENT state (a RST received in response to an initial SYN), + the RST is acceptable if the ACK field acknowledges the SYN." */ + if (ackno == pcb->snd_nxt) { + acceptable = 1; + } + } else { + /* "In all states except SYN-SENT, all reset (RST) segments are validated + by checking their SEQ-fields." */ + if (seqno == pcb->rcv_nxt) { + acceptable = 1; + } else if (TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt, + pcb->rcv_nxt + pcb->rcv_wnd)) { + /* If the sequence number is inside the window, we send a challenge ACK + and wait for a re-send with matching sequence number. + This follows RFC 5961 section 3.2 and addresses CVE-2004-0230 + (RST spoofing attack), which is present in RFC 793 RST handling. */ + tcp_ack_now(pcb); + } + } + + if (acceptable) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_process: Connection RESET\n")); + LWIP_ASSERT("tcp_input: pcb->state != CLOSED", pcb->state != CLOSED); + recv_flags |= TF_RESET; + tcp_clear_flags(pcb, TF_ACK_DELAY); + return ERR_RST; + } else { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_process: unacceptable reset seqno %"U32_F" rcv_nxt %"U32_F"\n", + seqno, pcb->rcv_nxt)); + LWIP_DEBUGF(TCP_DEBUG, ("tcp_process: unacceptable reset seqno %"U32_F" rcv_nxt %"U32_F"\n", + seqno, pcb->rcv_nxt)); + return ERR_OK; + } + } + + if ((flags & TCP_SYN) && (pcb->state != SYN_SENT && pcb->state != SYN_RCVD)) { + /* Cope with new connection attempt after remote end crashed */ + tcp_ack_now(pcb); + return ERR_OK; + } + + if ((pcb->flags & TF_RXCLOSED) == 0) { + /* Update the PCB (in)activity timer unless rx is closed (see tcp_shutdown) */ + pcb->tmr = tcp_ticks; + } + pcb->keep_cnt_sent = 0; + pcb->persist_probe = 0; + + tcp_parseopt(pcb); + + if (flags & TCP_SYN) { + /* accept SYN only in 2 states: */ + if ((pcb->state != SYN_SENT) && (pcb->state != SYN_RCVD)) { + return ERR_OK; + } + } + + /* Do different things depending on the TCP state. */ + switch (pcb->state) { + case SYN_SENT: + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("SYN-SENT: ackno %"U32_F" pcb->snd_nxt %"U32_F" unacked %s %"U32_F"\n", + ackno, pcb->snd_nxt, pcb->unacked ? "" : " empty:", + pcb->unacked ? lwip_ntohl(pcb->unacked->tcphdr->seqno) : 0)); + /* received SYN ACK with expected sequence number? */ + if ((flags & TCP_ACK) && (flags & TCP_SYN) + && (ackno == pcb->lastack + 1)) { + pcb->rcv_nxt = seqno + 1; + pcb->rcv_ann_right_edge = pcb->rcv_nxt; + pcb->lastack = ackno; + pcb->snd_wnd = tcphdr->wnd; + pcb->snd_wnd_max = pcb->snd_wnd; + pcb->snd_wl1 = seqno - 1; /* initialise to seqno - 1 to force window update */ + pcb->state = ESTABLISHED; + +#if TCP_CALCULATE_EFF_SEND_MSS + pcb->mss = tcp_eff_send_mss(pcb->mss, &pcb->local_ip, &pcb->remote_ip); +#endif /* TCP_CALCULATE_EFF_SEND_MSS */ + + pcb->cwnd = LWIP_TCP_CALC_INITIAL_CWND(pcb->mss); + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_process (SENT): cwnd %"TCPWNDSIZE_F + " ssthresh %"TCPWNDSIZE_F"\n", + pcb->cwnd, pcb->ssthresh)); + LWIP_ASSERT("pcb->snd_queuelen > 0", (pcb->snd_queuelen > 0)); + --pcb->snd_queuelen; + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_process: SYN-SENT --queuelen %"TCPWNDSIZE_F"\n", (tcpwnd_size_t)pcb->snd_queuelen)); + rseg = pcb->unacked; + if (rseg == NULL) { + /* might happen if tcp_output fails in tcp_rexmit_rto() + in which case the segment is on the unsent list */ + rseg = pcb->unsent; + LWIP_ASSERT("no segment to free", rseg != NULL); + pcb->unsent = rseg->next; + } else { + pcb->unacked = rseg->next; + } + tcp_seg_free(rseg); + + /* If there's nothing left to acknowledge, stop the retransmit + timer, otherwise reset it to start again */ + if (pcb->unacked == NULL) { + pcb->rtime = -1; + } else { + pcb->rtime = 0; + pcb->nrtx = 0; + } + + /* Call the user specified function to call when successfully + * connected. */ + TCP_EVENT_CONNECTED(pcb, ERR_OK, err); + if (err == ERR_ABRT) { + return ERR_ABRT; + } + tcp_ack_now(pcb); + } + /* received ACK? possibly a half-open connection */ + else if (flags & TCP_ACK) { + /* send a RST to bring the other side in a non-synchronized state. */ + tcp_rst(pcb, ackno, seqno + tcplen, ip_current_dest_addr(), + ip_current_src_addr(), tcphdr->dest, tcphdr->src); + /* Resend SYN immediately (don't wait for rto timeout) to establish + connection faster, but do not send more SYNs than we otherwise would + have, or we might get caught in a loop on loopback interfaces. */ + if (pcb->nrtx < TCP_SYNMAXRTX) { + pcb->rtime = 0; + tcp_rexmit_rto(pcb); + } + } + break; + case SYN_RCVD: + if (flags & TCP_SYN) { + if (seqno == pcb->rcv_nxt - 1) { + /* Looks like another copy of the SYN - retransmit our SYN-ACK */ + tcp_rexmit(pcb); + } + } else if (flags & TCP_ACK) { + /* expected ACK number? */ + if (TCP_SEQ_BETWEEN(ackno, pcb->lastack + 1, pcb->snd_nxt)) { + pcb->state = ESTABLISHED; + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection established %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest)); +#if LWIP_CALLBACK_API || TCP_LISTEN_BACKLOG + if (pcb->listener == NULL) { + /* listen pcb might be closed by now */ + err = ERR_VAL; + } else +#endif /* LWIP_CALLBACK_API || TCP_LISTEN_BACKLOG */ + { +#if LWIP_CALLBACK_API + LWIP_ASSERT("pcb->listener->accept != NULL", pcb->listener->accept != NULL); +#endif + tcp_backlog_accepted(pcb); + /* Call the accept function. */ + TCP_EVENT_ACCEPT(pcb->listener, pcb, pcb->callback_arg, ERR_OK, err); + } + if (err != ERR_OK) { + /* If the accept function returns with an error, we abort + * the connection. */ + /* Already aborted? */ + if (err != ERR_ABRT) { + tcp_abort(pcb); + } + return ERR_ABRT; + } + /* If there was any data contained within this ACK, + * we'd better pass it on to the application as well. */ + tcp_receive(pcb); + + /* Prevent ACK for SYN to generate a sent event */ + if (recv_acked != 0) { + recv_acked--; + } + + pcb->cwnd = LWIP_TCP_CALC_INITIAL_CWND(pcb->mss); + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_process (SYN_RCVD): cwnd %"TCPWNDSIZE_F + " ssthresh %"TCPWNDSIZE_F"\n", + pcb->cwnd, pcb->ssthresh)); + + if (recv_flags & TF_GOT_FIN) { + tcp_ack_now(pcb); + pcb->state = CLOSE_WAIT; + } + } else { + /* incorrect ACK number, send RST */ + tcp_rst(pcb, ackno, seqno + tcplen, ip_current_dest_addr(), + ip_current_src_addr(), tcphdr->dest, tcphdr->src); + } + } + break; + case CLOSE_WAIT: + /* FALLTHROUGH */ + case ESTABLISHED: + tcp_receive(pcb); + if (recv_flags & TF_GOT_FIN) { /* passive close */ + tcp_ack_now(pcb); + pcb->state = CLOSE_WAIT; + } + break; + case FIN_WAIT_1: + tcp_receive(pcb); + if (recv_flags & TF_GOT_FIN) { + if ((flags & TCP_ACK) && (ackno == pcb->snd_nxt) && + pcb->unsent == NULL) { + LWIP_DEBUGF(TCP_DEBUG, + ("TCP connection closed: FIN_WAIT_1 %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest)); + tcp_ack_now(pcb); + tcp_pcb_purge(pcb); + TCP_RMV_ACTIVE(pcb); + pcb->state = TIME_WAIT; + TCP_REG(&tcp_tw_pcbs, pcb); + } else { + tcp_ack_now(pcb); + pcb->state = CLOSING; + } + } else if ((flags & TCP_ACK) && (ackno == pcb->snd_nxt) && + pcb->unsent == NULL) { + pcb->state = FIN_WAIT_2; + } + break; + case FIN_WAIT_2: + tcp_receive(pcb); + if (recv_flags & TF_GOT_FIN) { + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed: FIN_WAIT_2 %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest)); + tcp_ack_now(pcb); + tcp_pcb_purge(pcb); + TCP_RMV_ACTIVE(pcb); + pcb->state = TIME_WAIT; + TCP_REG(&tcp_tw_pcbs, pcb); + } + break; + case CLOSING: + tcp_receive(pcb); + if ((flags & TCP_ACK) && ackno == pcb->snd_nxt && pcb->unsent == NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed: CLOSING %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest)); + tcp_pcb_purge(pcb); + TCP_RMV_ACTIVE(pcb); + pcb->state = TIME_WAIT; + TCP_REG(&tcp_tw_pcbs, pcb); + } + break; + case LAST_ACK: + tcp_receive(pcb); + if ((flags & TCP_ACK) && ackno == pcb->snd_nxt && pcb->unsent == NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed: LAST_ACK %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest)); + /* bugfix #21699: don't set pcb->state to CLOSED here or we risk leaking segments */ + recv_flags |= TF_CLOSED; + } + break; + default: + break; + } + return ERR_OK; +} + +#if TCP_QUEUE_OOSEQ +/** + * Insert segment into the list (segments covered with new one will be deleted) + * + * Called from tcp_receive() + */ +static void +tcp_oos_insert_segment(struct tcp_seg *cseg, struct tcp_seg *next) +{ + struct tcp_seg *old_seg; + + LWIP_ASSERT("tcp_oos_insert_segment: invalid cseg", cseg != NULL); + + if (TCPH_FLAGS(cseg->tcphdr) & TCP_FIN) { + /* received segment overlaps all following segments */ + tcp_segs_free(next); + next = NULL; + } else { + /* delete some following segments + oos queue may have segments with FIN flag */ + while (next && + TCP_SEQ_GEQ((seqno + cseg->len), + (next->tcphdr->seqno + next->len))) { + /* cseg with FIN already processed */ + if (TCPH_FLAGS(next->tcphdr) & TCP_FIN) { + TCPH_SET_FLAG(cseg->tcphdr, TCP_FIN); + } + old_seg = next; + next = next->next; + tcp_seg_free(old_seg); + } + if (next && + TCP_SEQ_GT(seqno + cseg->len, next->tcphdr->seqno)) { + /* We need to trim the incoming segment. */ + cseg->len = (u16_t)(next->tcphdr->seqno - seqno); + pbuf_realloc(cseg->p, cseg->len); + } + } + cseg->next = next; +} +#endif /* TCP_QUEUE_OOSEQ */ + +/** Remove segments from a list if the incoming ACK acknowledges them */ +static struct tcp_seg * +tcp_free_acked_segments(struct tcp_pcb *pcb, struct tcp_seg *seg_list, const char *dbg_list_name, + struct tcp_seg *dbg_other_seg_list) +{ + struct tcp_seg *next; + u16_t clen; + + LWIP_UNUSED_ARG(dbg_list_name); + LWIP_UNUSED_ARG(dbg_other_seg_list); + + while (seg_list != NULL && + TCP_SEQ_LEQ(lwip_ntohl(seg_list->tcphdr->seqno) + + TCP_TCPLEN(seg_list), ackno)) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: removing %"U32_F":%"U32_F" from pcb->%s\n", + lwip_ntohl(seg_list->tcphdr->seqno), + lwip_ntohl(seg_list->tcphdr->seqno) + TCP_TCPLEN(seg_list), + dbg_list_name)); + + next = seg_list; + seg_list = seg_list->next; + + clen = pbuf_clen(next->p); + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_receive: queuelen %"TCPWNDSIZE_F" ... ", + (tcpwnd_size_t)pcb->snd_queuelen)); + LWIP_ASSERT("pcb->snd_queuelen >= pbuf_clen(next->p)", (pcb->snd_queuelen >= clen)); + + pcb->snd_queuelen = (u16_t)(pcb->snd_queuelen - clen); + recv_acked = (tcpwnd_size_t)(recv_acked + next->len); + tcp_seg_free(next); + + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("%"TCPWNDSIZE_F" (after freeing %s)\n", + (tcpwnd_size_t)pcb->snd_queuelen, + dbg_list_name)); + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_receive: valid queue length", + seg_list != NULL || dbg_other_seg_list != NULL); + } + } + return seg_list; +} + +/** + * Called by tcp_process. Checks if the given segment is an ACK for outstanding + * data, and if so frees the memory of the buffered data. Next, it places the + * segment on any of the receive queues (pcb->recved or pcb->ooseq). If the segment + * is buffered, the pbuf is referenced by pbuf_ref so that it will not be freed until + * it has been removed from the buffer. + * + * If the incoming segment constitutes an ACK for a segment that was used for RTT + * estimation, the RTT is estimated here as well. + * + * Called from tcp_process(). + */ +static void +tcp_receive(struct tcp_pcb *pcb) +{ + s16_t m; + u32_t right_wnd_edge; + + LWIP_ASSERT("tcp_receive: invalid pcb", pcb != NULL); + LWIP_ASSERT("tcp_receive: wrong state", pcb->state >= ESTABLISHED); + + if (flags & TCP_ACK) { + right_wnd_edge = pcb->snd_wnd + pcb->snd_wl2; + + /* Update window. */ + if (TCP_SEQ_LT(pcb->snd_wl1, seqno) || + (pcb->snd_wl1 == seqno && TCP_SEQ_LT(pcb->snd_wl2, ackno)) || + (pcb->snd_wl2 == ackno && (u32_t)SND_WND_SCALE(pcb, tcphdr->wnd) > pcb->snd_wnd)) { + pcb->snd_wnd = SND_WND_SCALE(pcb, tcphdr->wnd); + /* keep track of the biggest window announced by the remote host to calculate + the maximum segment size */ + if (pcb->snd_wnd_max < pcb->snd_wnd) { + pcb->snd_wnd_max = pcb->snd_wnd; + } + pcb->snd_wl1 = seqno; + pcb->snd_wl2 = ackno; + LWIP_DEBUGF(TCP_WND_DEBUG, ("tcp_receive: window update %"TCPWNDSIZE_F"\n", pcb->snd_wnd)); +#if TCP_WND_DEBUG + } else { + if (pcb->snd_wnd != (tcpwnd_size_t)SND_WND_SCALE(pcb, tcphdr->wnd)) { + LWIP_DEBUGF(TCP_WND_DEBUG, + ("tcp_receive: no window update lastack %"U32_F" ackno %" + U32_F" wl1 %"U32_F" seqno %"U32_F" wl2 %"U32_F"\n", + pcb->lastack, ackno, pcb->snd_wl1, seqno, pcb->snd_wl2)); + } +#endif /* TCP_WND_DEBUG */ + } + + /* (From Stevens TCP/IP Illustrated Vol II, p970.) Its only a + * duplicate ack if: + * 1) It doesn't ACK new data + * 2) length of received packet is zero (i.e. no payload) + * 3) the advertised window hasn't changed + * 4) There is outstanding unacknowledged data (retransmission timer running) + * 5) The ACK is == biggest ACK sequence number so far seen (snd_una) + * + * If it passes all five, should process as a dupack: + * a) dupacks < 3: do nothing + * b) dupacks == 3: fast retransmit + * c) dupacks > 3: increase cwnd + * + * If it only passes 1-3, should reset dupack counter (and add to + * stats, which we don't do in lwIP) + * + * If it only passes 1, should reset dupack counter + * + */ + + /* Clause 1 */ + if (TCP_SEQ_LEQ(ackno, pcb->lastack)) { + /* Clause 2 */ + if (tcplen == 0) { + /* Clause 3 */ + if (pcb->snd_wl2 + pcb->snd_wnd == right_wnd_edge) { + /* Clause 4 */ + if (pcb->rtime >= 0) { + /* Clause 5 */ + if (pcb->lastack == ackno) { + if ((u8_t)(pcb->dupacks + 1) > pcb->dupacks) { + ++pcb->dupacks; + } + if (pcb->dupacks > 3) { + /* Inflate the congestion window */ + TCP_WND_INC(pcb->cwnd, pcb->mss); + } + if (pcb->dupacks >= 3) { + /* Do fast retransmit (checked via TF_INFR, not via dupacks count) */ + tcp_rexmit_fast(pcb); + } + } + } + } + } + } else if (TCP_SEQ_BETWEEN(ackno, pcb->lastack + 1, pcb->snd_nxt)) { + /* We come here when the ACK acknowledges new data. */ + tcpwnd_size_t acked; + + /* Reset the "IN Fast Retransmit" flag, since we are no longer + in fast retransmit. Also reset the congestion window to the + slow start threshold. */ + if (pcb->flags & TF_INFR) { + tcp_clear_flags(pcb, TF_INFR); + pcb->cwnd = pcb->ssthresh; + pcb->bytes_acked = 0; + } + + /* Reset the number of retransmissions. */ + pcb->nrtx = 0; + + /* Reset the retransmission time-out. */ + pcb->rto = (s16_t)((pcb->sa >> 3) + pcb->sv); + + /* Record how much data this ACK acks */ + acked = (tcpwnd_size_t)(ackno - pcb->lastack); + + /* Reset the fast retransmit variables. */ + pcb->dupacks = 0; + pcb->lastack = ackno; + + /* Update the congestion control variables (cwnd and + ssthresh). */ + if (pcb->state >= ESTABLISHED) { + if (pcb->cwnd < pcb->ssthresh) { + tcpwnd_size_t increase; + /* limit to 1 SMSS segment during period following RTO */ + u8_t num_seg = (pcb->flags & TF_RTO) ? 1 : 2; + /* RFC 3465, section 2.2 Slow Start */ + increase = LWIP_MIN(acked, (tcpwnd_size_t)(num_seg * pcb->mss)); + TCP_WND_INC(pcb->cwnd, increase); + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_receive: slow start cwnd %"TCPWNDSIZE_F"\n", pcb->cwnd)); + } else { + /* RFC 3465, section 2.1 Congestion Avoidance */ + TCP_WND_INC(pcb->bytes_acked, acked); + if (pcb->bytes_acked >= pcb->cwnd) { + pcb->bytes_acked = (tcpwnd_size_t)(pcb->bytes_acked - pcb->cwnd); + TCP_WND_INC(pcb->cwnd, pcb->mss); + } + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_receive: congestion avoidance cwnd %"TCPWNDSIZE_F"\n", pcb->cwnd)); + } + } + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: ACK for %"U32_F", unacked->seqno %"U32_F":%"U32_F"\n", + ackno, + pcb->unacked != NULL ? + lwip_ntohl(pcb->unacked->tcphdr->seqno) : 0, + pcb->unacked != NULL ? + lwip_ntohl(pcb->unacked->tcphdr->seqno) + TCP_TCPLEN(pcb->unacked) : 0)); + + /* Remove segment from the unacknowledged list if the incoming + ACK acknowledges them. */ + pcb->unacked = tcp_free_acked_segments(pcb, pcb->unacked, "unacked", pcb->unsent); + /* We go through the ->unsent list to see if any of the segments + on the list are acknowledged by the ACK. This may seem + strange since an "unsent" segment shouldn't be acked. The + rationale is that lwIP puts all outstanding segments on the + ->unsent list after a retransmission, so these segments may + in fact have been sent once. */ + pcb->unsent = tcp_free_acked_segments(pcb, pcb->unsent, "unsent", pcb->unacked); + + /* If there's nothing left to acknowledge, stop the retransmit + timer, otherwise reset it to start again */ + if (pcb->unacked == NULL) { + pcb->rtime = -1; + } else { + pcb->rtime = 0; + } + + pcb->polltmr = 0; + +#if TCP_OVERSIZE + if (pcb->unsent == NULL) { + pcb->unsent_oversize = 0; + } +#endif /* TCP_OVERSIZE */ + +#if LWIP_IPV6 && LWIP_ND6_TCP_REACHABILITY_HINTS + if (ip_current_is_v6()) { + /* Inform neighbor reachability of forward progress. */ + nd6_reachability_hint(ip6_current_src_addr()); + } +#endif /* LWIP_IPV6 && LWIP_ND6_TCP_REACHABILITY_HINTS*/ + + pcb->snd_buf = (tcpwnd_size_t)(pcb->snd_buf + recv_acked); + /* check if this ACK ends our retransmission of in-flight data */ + if (pcb->flags & TF_RTO) { + /* RTO is done if + 1) both queues are empty or + 2) unacked is empty and unsent head contains data not part of RTO or + 3) unacked head contains data not part of RTO */ + if (pcb->unacked == NULL) { + if ((pcb->unsent == NULL) || + (TCP_SEQ_LEQ(pcb->rto_end, lwip_ntohl(pcb->unsent->tcphdr->seqno)))) { + tcp_clear_flags(pcb, TF_RTO); + } + } else if (TCP_SEQ_LEQ(pcb->rto_end, lwip_ntohl(pcb->unacked->tcphdr->seqno))) { + tcp_clear_flags(pcb, TF_RTO); + } + } + /* End of ACK for new data processing. */ + } else { + /* Out of sequence ACK, didn't really ack anything */ + tcp_send_empty_ack(pcb); + } + + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: pcb->rttest %"U32_F" rtseq %"U32_F" ackno %"U32_F"\n", + pcb->rttest, pcb->rtseq, ackno)); + + /* RTT estimation calculations. This is done by checking if the + incoming segment acknowledges the segment we use to take a + round-trip time measurement. */ + if (pcb->rttest && TCP_SEQ_LT(pcb->rtseq, ackno)) { + /* diff between this shouldn't exceed 32K since this are tcp timer ticks + and a round-trip shouldn't be that long... */ + m = (s16_t)(tcp_ticks - pcb->rttest); + + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: experienced rtt %"U16_F" ticks (%"U16_F" msec).\n", + m, (u16_t)(m * TCP_SLOW_INTERVAL))); + + /* This is taken directly from VJs original code in his paper */ + m = (s16_t)(m - (pcb->sa >> 3)); + pcb->sa = (s16_t)(pcb->sa + m); + if (m < 0) { + m = (s16_t) - m; + } + m = (s16_t)(m - (pcb->sv >> 2)); + pcb->sv = (s16_t)(pcb->sv + m); + pcb->rto = (s16_t)((pcb->sa >> 3) + pcb->sv); + + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: RTO %"U16_F" (%"U16_F" milliseconds)\n", + pcb->rto, (u16_t)(pcb->rto * TCP_SLOW_INTERVAL))); + + pcb->rttest = 0; + } + } + + /* If the incoming segment contains data, we must process it + further unless the pcb already received a FIN. + (RFC 793, chapter 3.9, "SEGMENT ARRIVES" in states CLOSE-WAIT, CLOSING, + LAST-ACK and TIME-WAIT: "Ignore the segment text.") */ + if ((tcplen > 0) && (pcb->state < CLOSE_WAIT)) { + /* This code basically does three things: + + +) If the incoming segment contains data that is the next + in-sequence data, this data is passed to the application. This + might involve trimming the first edge of the data. The rcv_nxt + variable and the advertised window are adjusted. + + +) If the incoming segment has data that is above the next + sequence number expected (->rcv_nxt), the segment is placed on + the ->ooseq queue. This is done by finding the appropriate + place in the ->ooseq queue (which is ordered by sequence + number) and trim the segment in both ends if needed. An + immediate ACK is sent to indicate that we received an + out-of-sequence segment. + + +) Finally, we check if the first segment on the ->ooseq queue + now is in sequence (i.e., if rcv_nxt >= ooseq->seqno). If + rcv_nxt > ooseq->seqno, we must trim the first edge of the + segment on ->ooseq before we adjust rcv_nxt. The data in the + segments that are now on sequence are chained onto the + incoming segment so that we only need to call the application + once. + */ + + /* First, we check if we must trim the first edge. We have to do + this if the sequence number of the incoming segment is less + than rcv_nxt, and the sequence number plus the length of the + segment is larger than rcv_nxt. */ + /* if (TCP_SEQ_LT(seqno, pcb->rcv_nxt)) { + if (TCP_SEQ_LT(pcb->rcv_nxt, seqno + tcplen)) {*/ + if (TCP_SEQ_BETWEEN(pcb->rcv_nxt, seqno + 1, seqno + tcplen - 1)) { + /* Trimming the first edge is done by pushing the payload + pointer in the pbuf downwards. This is somewhat tricky since + we do not want to discard the full contents of the pbuf up to + the new starting point of the data since we have to keep the + TCP header which is present in the first pbuf in the chain. + + What is done is really quite a nasty hack: the first pbuf in + the pbuf chain is pointed to by inseg.p. Since we need to be + able to deallocate the whole pbuf, we cannot change this + inseg.p pointer to point to any of the later pbufs in the + chain. Instead, we point the ->payload pointer in the first + pbuf to data in one of the later pbufs. We also set the + inseg.data pointer to point to the right place. This way, the + ->p pointer will still point to the first pbuf, but the + ->p->payload pointer will point to data in another pbuf. + + After we are done with adjusting the pbuf pointers we must + adjust the ->data pointer in the seg and the segment + length.*/ + + struct pbuf *p = inseg.p; + u32_t off32 = pcb->rcv_nxt - seqno; + u16_t new_tot_len, off; + LWIP_ASSERT("inseg.p != NULL", inseg.p); + LWIP_ASSERT("insane offset!", (off32 < 0xffff)); + off = (u16_t)off32; + LWIP_ASSERT("pbuf too short!", (((s32_t)inseg.p->tot_len) >= off)); + inseg.len -= off; + new_tot_len = (u16_t)(inseg.p->tot_len - off); + while (p->len < off) { + off -= p->len; + /* all pbufs up to and including this one have len==0, so tot_len is equal */ + p->tot_len = new_tot_len; + p->len = 0; + p = p->next; + } + /* cannot fail... */ + pbuf_remove_header(p, off); + inseg.tcphdr->seqno = seqno = pcb->rcv_nxt; + } else { + if (TCP_SEQ_LT(seqno, pcb->rcv_nxt)) { + /* the whole segment is < rcv_nxt */ + /* must be a duplicate of a packet that has already been correctly handled */ + + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: duplicate seqno %"U32_F"\n", seqno)); + tcp_ack_now(pcb); + } + } + + /* The sequence number must be within the window (above rcv_nxt + and below rcv_nxt + rcv_wnd) in order to be further + processed. */ + if (TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt, + pcb->rcv_nxt + pcb->rcv_wnd - 1)) { + if (pcb->rcv_nxt == seqno) { + /* The incoming segment is the next in sequence. We check if + we have to trim the end of the segment and update rcv_nxt + and pass the data to the application. */ + tcplen = TCP_TCPLEN(&inseg); + + if (tcplen > pcb->rcv_wnd) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, + ("tcp_receive: other end overran receive window" + "seqno %"U32_F" len %"U16_F" right edge %"U32_F"\n", + seqno, tcplen, pcb->rcv_nxt + pcb->rcv_wnd)); + if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) { + /* Must remove the FIN from the header as we're trimming + * that byte of sequence-space from the packet */ + TCPH_FLAGS_SET(inseg.tcphdr, TCPH_FLAGS(inseg.tcphdr) & ~(unsigned int)TCP_FIN); + } + /* Adjust length of segment to fit in the window. */ + TCPWND_CHECK16(pcb->rcv_wnd); + inseg.len = (u16_t)pcb->rcv_wnd; + if (TCPH_FLAGS(inseg.tcphdr) & TCP_SYN) { + inseg.len -= 1; + } + pbuf_realloc(inseg.p, inseg.len); + tcplen = TCP_TCPLEN(&inseg); + LWIP_ASSERT("tcp_receive: segment not trimmed correctly to rcv_wnd", + (seqno + tcplen) == (pcb->rcv_nxt + pcb->rcv_wnd)); + } +#if TCP_QUEUE_OOSEQ + /* Received in-sequence data, adjust ooseq data if: + - FIN has been received or + - inseq overlaps with ooseq */ + if (pcb->ooseq != NULL) { + if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, + ("tcp_receive: received in-order FIN, binning ooseq queue\n")); + /* Received in-order FIN means anything that was received + * out of order must now have been received in-order, so + * bin the ooseq queue */ + while (pcb->ooseq != NULL) { + struct tcp_seg *old_ooseq = pcb->ooseq; + pcb->ooseq = pcb->ooseq->next; + tcp_seg_free(old_ooseq); + } + } else { + struct tcp_seg *next = pcb->ooseq; + /* Remove all segments on ooseq that are covered by inseg already. + * FIN is copied from ooseq to inseg if present. */ + while (next && + TCP_SEQ_GEQ(seqno + tcplen, + next->tcphdr->seqno + next->len)) { + struct tcp_seg *tmp; + /* inseg cannot have FIN here (already processed above) */ + if ((TCPH_FLAGS(next->tcphdr) & TCP_FIN) != 0 && + (TCPH_FLAGS(inseg.tcphdr) & TCP_SYN) == 0) { + TCPH_SET_FLAG(inseg.tcphdr, TCP_FIN); + tcplen = TCP_TCPLEN(&inseg); + } + tmp = next; + next = next->next; + tcp_seg_free(tmp); + } + /* Now trim right side of inseg if it overlaps with the first + * segment on ooseq */ + if (next && + TCP_SEQ_GT(seqno + tcplen, + next->tcphdr->seqno)) { + /* inseg cannot have FIN here (already processed above) */ + inseg.len = (u16_t)(next->tcphdr->seqno - seqno); + if (TCPH_FLAGS(inseg.tcphdr) & TCP_SYN) { + inseg.len -= 1; + } + pbuf_realloc(inseg.p, inseg.len); + tcplen = TCP_TCPLEN(&inseg); + LWIP_ASSERT("tcp_receive: segment not trimmed correctly to ooseq queue", + (seqno + tcplen) == next->tcphdr->seqno); + } + pcb->ooseq = next; + } + } +#endif /* TCP_QUEUE_OOSEQ */ + + pcb->rcv_nxt = seqno + tcplen; + + /* Update the receiver's (our) window. */ + LWIP_ASSERT("tcp_receive: tcplen > rcv_wnd", pcb->rcv_wnd >= tcplen); + pcb->rcv_wnd -= tcplen; + + tcp_update_rcv_ann_wnd(pcb); + + /* If there is data in the segment, we make preparations to + pass this up to the application. The ->recv_data variable + is used for holding the pbuf that goes to the + application. The code for reassembling out-of-sequence data + chains its data on this pbuf as well. + + If the segment was a FIN, we set the TF_GOT_FIN flag that will + be used to indicate to the application that the remote side has + closed its end of the connection. */ + if (inseg.p->tot_len > 0) { + recv_data = inseg.p; + /* Since this pbuf now is the responsibility of the + application, we delete our reference to it so that we won't + (mistakingly) deallocate it. */ + inseg.p = NULL; + } + if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: received FIN.\n")); + recv_flags |= TF_GOT_FIN; + } + +#if TCP_QUEUE_OOSEQ + /* We now check if we have segments on the ->ooseq queue that + are now in sequence. */ + while (pcb->ooseq != NULL && + pcb->ooseq->tcphdr->seqno == pcb->rcv_nxt) { + + struct tcp_seg *cseg = pcb->ooseq; + seqno = pcb->ooseq->tcphdr->seqno; + + pcb->rcv_nxt += TCP_TCPLEN(cseg); + LWIP_ASSERT("tcp_receive: ooseq tcplen > rcv_wnd", + pcb->rcv_wnd >= TCP_TCPLEN(cseg)); + pcb->rcv_wnd -= TCP_TCPLEN(cseg); + + tcp_update_rcv_ann_wnd(pcb); + + if (cseg->p->tot_len > 0) { + /* Chain this pbuf onto the pbuf that we will pass to + the application. */ + /* With window scaling, this can overflow recv_data->tot_len, but + that's not a problem since we explicitly fix that before passing + recv_data to the application. */ + if (recv_data) { + pbuf_cat(recv_data, cseg->p); + } else { + recv_data = cseg->p; + } + cseg->p = NULL; + } + if (TCPH_FLAGS(cseg->tcphdr) & TCP_FIN) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: dequeued FIN.\n")); + recv_flags |= TF_GOT_FIN; + if (pcb->state == ESTABLISHED) { /* force passive close or we can move to active close */ + pcb->state = CLOSE_WAIT; + } + } + + pcb->ooseq = cseg->next; + tcp_seg_free(cseg); + } +#if LWIP_TCP_SACK_OUT + if (pcb->flags & TF_SACK) { + if (pcb->ooseq != NULL) { + /* Some segments may have been removed from ooseq, let's remove all SACKs that + describe anything before the new beginning of that list. */ + tcp_remove_sacks_lt(pcb, pcb->ooseq->tcphdr->seqno); + } else if (LWIP_TCP_SACK_VALID(pcb, 0)) { + /* ooseq has been cleared. Nothing to SACK */ + memset(pcb->rcv_sacks, 0, sizeof(pcb->rcv_sacks)); + } + } +#endif /* LWIP_TCP_SACK_OUT */ +#endif /* TCP_QUEUE_OOSEQ */ + + + /* Acknowledge the segment(s). */ + tcp_ack(pcb); + +#if LWIP_TCP_SACK_OUT + if (LWIP_TCP_SACK_VALID(pcb, 0)) { + /* Normally the ACK for the data received could be piggy-backed on a data packet, + but lwIP currently does not support including SACKs in data packets. So we force + it to respond with an empty ACK packet (only if there is at least one SACK to be sent). + NOTE: tcp_send_empty_ack() on success clears the ACK flags (set by tcp_ack()) */ + tcp_send_empty_ack(pcb); + } +#endif /* LWIP_TCP_SACK_OUT */ + +#if LWIP_IPV6 && LWIP_ND6_TCP_REACHABILITY_HINTS + if (ip_current_is_v6()) { + /* Inform neighbor reachability of forward progress. */ + nd6_reachability_hint(ip6_current_src_addr()); + } +#endif /* LWIP_IPV6 && LWIP_ND6_TCP_REACHABILITY_HINTS*/ + + } else { + /* We get here if the incoming segment is out-of-sequence. */ + +#if TCP_QUEUE_OOSEQ + /* We queue the segment on the ->ooseq queue. */ + if (pcb->ooseq == NULL) { + pcb->ooseq = tcp_seg_copy(&inseg); +#if LWIP_TCP_SACK_OUT + if (pcb->flags & TF_SACK) { + /* All the SACKs should be invalid, so we can simply store the most recent one: */ + pcb->rcv_sacks[0].left = seqno; + pcb->rcv_sacks[0].right = seqno + inseg.len; + } +#endif /* LWIP_TCP_SACK_OUT */ + } else { + /* If the queue is not empty, we walk through the queue and + try to find a place where the sequence number of the + incoming segment is between the sequence numbers of the + previous and the next segment on the ->ooseq queue. That is + the place where we put the incoming segment. If needed, we + trim the second edges of the previous and the incoming + segment so that it will fit into the sequence. + + If the incoming segment has the same sequence number as a + segment on the ->ooseq queue, we discard the segment that + contains less data. */ + +#if LWIP_TCP_SACK_OUT + /* This is the left edge of the lowest possible SACK range. + It may start before the newly received segment (possibly adjusted below). */ + u32_t sackbeg = TCP_SEQ_LT(seqno, pcb->ooseq->tcphdr->seqno) ? seqno : pcb->ooseq->tcphdr->seqno; +#endif /* LWIP_TCP_SACK_OUT */ + struct tcp_seg *next, *prev = NULL; + for (next = pcb->ooseq; next != NULL; next = next->next) { + if (seqno == next->tcphdr->seqno) { + /* The sequence number of the incoming segment is the + same as the sequence number of the segment on + ->ooseq. We check the lengths to see which one to + discard. */ + if (inseg.len > next->len) { + /* The incoming segment is larger than the old + segment. We replace some segments with the new + one. */ + struct tcp_seg *cseg = tcp_seg_copy(&inseg); + if (cseg != NULL) { + if (prev != NULL) { + prev->next = cseg; + } else { + pcb->ooseq = cseg; + } + tcp_oos_insert_segment(cseg, next); + } + break; + } else { + /* Either the lengths are the same or the incoming + segment was smaller than the old one; in either + case, we ditch the incoming segment. */ + break; + } + } else { + if (prev == NULL) { + if (TCP_SEQ_LT(seqno, next->tcphdr->seqno)) { + /* The sequence number of the incoming segment is lower + than the sequence number of the first segment on the + queue. We put the incoming segment first on the + queue. */ + struct tcp_seg *cseg = tcp_seg_copy(&inseg); + if (cseg != NULL) { + pcb->ooseq = cseg; + tcp_oos_insert_segment(cseg, next); + } + break; + } + } else { + /*if (TCP_SEQ_LT(prev->tcphdr->seqno, seqno) && + TCP_SEQ_LT(seqno, next->tcphdr->seqno)) {*/ + if (TCP_SEQ_BETWEEN(seqno, prev->tcphdr->seqno + 1, next->tcphdr->seqno - 1)) { + /* The sequence number of the incoming segment is in + between the sequence numbers of the previous and + the next segment on ->ooseq. We trim trim the previous + segment, delete next segments that included in received segment + and trim received, if needed. */ + struct tcp_seg *cseg = tcp_seg_copy(&inseg); + if (cseg != NULL) { + if (TCP_SEQ_GT(prev->tcphdr->seqno + prev->len, seqno)) { + /* We need to trim the prev segment. */ + prev->len = (u16_t)(seqno - prev->tcphdr->seqno); + pbuf_realloc(prev->p, prev->len); + } + prev->next = cseg; + tcp_oos_insert_segment(cseg, next); + } + break; + } + } + +#if LWIP_TCP_SACK_OUT + /* The new segment goes after the 'next' one. If there is a "hole" in sequence numbers + between 'prev' and the beginning of 'next', we want to move sackbeg. */ + if (prev != NULL && prev->tcphdr->seqno + prev->len != next->tcphdr->seqno) { + sackbeg = next->tcphdr->seqno; + } +#endif /* LWIP_TCP_SACK_OUT */ + + /* We don't use 'prev' below, so let's set it to current 'next'. + This way even if we break the loop below, 'prev' will be pointing + at the segment right in front of the newly added one. */ + prev = next; + + /* If the "next" segment is the last segment on the + ooseq queue, we add the incoming segment to the end + of the list. */ + if (next->next == NULL && + TCP_SEQ_GT(seqno, next->tcphdr->seqno)) { + if (TCPH_FLAGS(next->tcphdr) & TCP_FIN) { + /* segment "next" already contains all data */ + break; + } + next->next = tcp_seg_copy(&inseg); + if (next->next != NULL) { + if (TCP_SEQ_GT(next->tcphdr->seqno + next->len, seqno)) { + /* We need to trim the last segment. */ + next->len = (u16_t)(seqno - next->tcphdr->seqno); + pbuf_realloc(next->p, next->len); + } + /* check if the remote side overruns our receive window */ + if (TCP_SEQ_GT((u32_t)tcplen + seqno, pcb->rcv_nxt + (u32_t)pcb->rcv_wnd)) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, + ("tcp_receive: other end overran receive window" + "seqno %"U32_F" len %"U16_F" right edge %"U32_F"\n", + seqno, tcplen, pcb->rcv_nxt + pcb->rcv_wnd)); + if (TCPH_FLAGS(next->next->tcphdr) & TCP_FIN) { + /* Must remove the FIN from the header as we're trimming + * that byte of sequence-space from the packet */ + TCPH_FLAGS_SET(next->next->tcphdr, TCPH_FLAGS(next->next->tcphdr) & ~TCP_FIN); + } + /* Adjust length of segment to fit in the window. */ + next->next->len = (u16_t)(pcb->rcv_nxt + pcb->rcv_wnd - seqno); + pbuf_realloc(next->next->p, next->next->len); + tcplen = TCP_TCPLEN(next->next); + LWIP_ASSERT("tcp_receive: segment not trimmed correctly to rcv_wnd", + (seqno + tcplen) == (pcb->rcv_nxt + pcb->rcv_wnd)); + } + } + break; + } + } + } + +#if LWIP_TCP_SACK_OUT + if (pcb->flags & TF_SACK) { + if (prev == NULL) { + /* The new segment is at the beginning. sackbeg should already be set properly. + We need to find the right edge. */ + next = pcb->ooseq; + } else if (prev->next != NULL) { + /* The new segment was added after 'prev'. If there is a "hole" between 'prev' and 'prev->next', + we need to move sackbeg. After that we should find the right edge. */ + next = prev->next; + if (prev->tcphdr->seqno + prev->len != next->tcphdr->seqno) { + sackbeg = next->tcphdr->seqno; + } + } else { + next = NULL; + } + if (next != NULL) { + u32_t sackend = next->tcphdr->seqno; + for ( ; (next != NULL) && (sackend == next->tcphdr->seqno); next = next->next) { + sackend += next->len; + } + tcp_add_sack(pcb, sackbeg, sackend); + } + } +#endif /* LWIP_TCP_SACK_OUT */ + } +#if defined(TCP_OOSEQ_BYTES_LIMIT) || defined(TCP_OOSEQ_PBUFS_LIMIT) + { + /* Check that the data on ooseq doesn't exceed one of the limits + and throw away everything above that limit. */ +#ifdef TCP_OOSEQ_BYTES_LIMIT + const u32_t ooseq_max_blen = TCP_OOSEQ_BYTES_LIMIT(pcb); + u32_t ooseq_blen = 0; +#endif +#ifdef TCP_OOSEQ_PBUFS_LIMIT + const u16_t ooseq_max_qlen = TCP_OOSEQ_PBUFS_LIMIT(pcb); + u16_t ooseq_qlen = 0; +#endif + struct tcp_seg *next, *prev = NULL; + for (next = pcb->ooseq; next != NULL; prev = next, next = next->next) { + struct pbuf *p = next->p; + int stop_here = 0; +#ifdef TCP_OOSEQ_BYTES_LIMIT + ooseq_blen += p->tot_len; + if (ooseq_blen > ooseq_max_blen) { + stop_here = 1; + } +#endif +#ifdef TCP_OOSEQ_PBUFS_LIMIT + ooseq_qlen += pbuf_clen(p); + if (ooseq_qlen > ooseq_max_qlen) { + stop_here = 1; + } +#endif + if (stop_here) { +#if LWIP_TCP_SACK_OUT + if (pcb->flags & TF_SACK) { + /* Let's remove all SACKs from next's seqno up. */ + tcp_remove_sacks_gt(pcb, next->tcphdr->seqno); + } +#endif /* LWIP_TCP_SACK_OUT */ + /* too much ooseq data, dump this and everything after it */ + tcp_segs_free(next); + if (prev == NULL) { + /* first ooseq segment is too much, dump the whole queue */ + pcb->ooseq = NULL; + } else { + /* just dump 'next' and everything after it */ + prev->next = NULL; + } + break; + } + } + } +#endif /* TCP_OOSEQ_BYTES_LIMIT || TCP_OOSEQ_PBUFS_LIMIT */ +#endif /* TCP_QUEUE_OOSEQ */ + + /* We send the ACK packet after we've (potentially) dealt with SACKs, + so they can be included in the acknowledgment. */ + tcp_send_empty_ack(pcb); + } + } else { + /* The incoming segment is not within the window. */ + tcp_send_empty_ack(pcb); + } + } else { + /* Segments with length 0 is taken care of here. Segments that + fall out of the window are ACKed. */ + if (!TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt, pcb->rcv_nxt + pcb->rcv_wnd - 1)) { + tcp_ack_now(pcb); + } + } +} + +static u8_t +tcp_get_next_optbyte(void) +{ + u16_t optidx = tcp_optidx++; + if ((tcphdr_opt2 == NULL) || (optidx < tcphdr_opt1len)) { + u8_t *opts = (u8_t *)tcphdr + TCP_HLEN; + return opts[optidx]; + } else { + u8_t idx = (u8_t)(optidx - tcphdr_opt1len); + return tcphdr_opt2[idx]; + } +} + +/** + * Parses the options contained in the incoming segment. + * + * Called from tcp_listen_input() and tcp_process(). + * Currently, only the MSS option is supported! + * + * @param pcb the tcp_pcb for which a segment arrived + */ +static void +tcp_parseopt(struct tcp_pcb *pcb) +{ + u8_t data; + u16_t mss; +#if LWIP_TCP_TIMESTAMPS + u32_t tsval; +#endif + + LWIP_ASSERT("tcp_parseopt: invalid pcb", pcb != NULL); + + /* Parse the TCP MSS option, if present. */ + if (tcphdr_optlen != 0) { + for (tcp_optidx = 0; tcp_optidx < tcphdr_optlen; ) { + u8_t opt = tcp_get_next_optbyte(); + switch (opt) { + case LWIP_TCP_OPT_EOL: + /* End of options. */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: EOL\n")); + return; + case LWIP_TCP_OPT_NOP: + /* NOP option. */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: NOP\n")); + break; + case LWIP_TCP_OPT_MSS: + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: MSS\n")); + if (tcp_get_next_optbyte() != LWIP_TCP_OPT_LEN_MSS || (tcp_optidx - 2 + LWIP_TCP_OPT_LEN_MSS) > tcphdr_optlen) { + /* Bad length */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n")); + return; + } + /* An MSS option with the right option length. */ + mss = (u16_t)(tcp_get_next_optbyte() << 8); + mss |= tcp_get_next_optbyte(); + /* Limit the mss to the configured TCP_MSS and prevent division by zero */ + pcb->mss = ((mss > TCP_MSS) || (mss == 0)) ? TCP_MSS : mss; + break; +#if LWIP_WND_SCALE + case LWIP_TCP_OPT_WS: + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: WND_SCALE\n")); + if (tcp_get_next_optbyte() != LWIP_TCP_OPT_LEN_WS || (tcp_optidx - 2 + LWIP_TCP_OPT_LEN_WS) > tcphdr_optlen) { + /* Bad length */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n")); + return; + } + /* An WND_SCALE option with the right option length. */ + data = tcp_get_next_optbyte(); + /* If syn was received with wnd scale option, + activate wnd scale opt, but only if this is not a retransmission */ + if ((flags & TCP_SYN) && !(pcb->flags & TF_WND_SCALE)) { + pcb->snd_scale = data; + if (pcb->snd_scale > 14U) { + pcb->snd_scale = 14U; + } + pcb->rcv_scale = TCP_RCV_SCALE; + tcp_set_flags(pcb, TF_WND_SCALE); + /* window scaling is enabled, we can use the full receive window */ + LWIP_ASSERT("window not at default value", pcb->rcv_wnd == TCPWND_MIN16(TCP_WND)); + LWIP_ASSERT("window not at default value", pcb->rcv_ann_wnd == TCPWND_MIN16(TCP_WND)); + pcb->rcv_wnd = pcb->rcv_ann_wnd = TCP_WND; + } + break; +#endif /* LWIP_WND_SCALE */ +#if LWIP_TCP_TIMESTAMPS + case LWIP_TCP_OPT_TS: + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: TS\n")); + if (tcp_get_next_optbyte() != LWIP_TCP_OPT_LEN_TS || (tcp_optidx - 2 + LWIP_TCP_OPT_LEN_TS) > tcphdr_optlen) { + /* Bad length */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n")); + return; + } + /* TCP timestamp option with valid length */ + tsval = tcp_get_next_optbyte(); + tsval |= (tcp_get_next_optbyte() << 8); + tsval |= (tcp_get_next_optbyte() << 16); + tsval |= (tcp_get_next_optbyte() << 24); + if (flags & TCP_SYN) { + pcb->ts_recent = lwip_ntohl(tsval); + /* Enable sending timestamps in every segment now that we know + the remote host supports it. */ + tcp_set_flags(pcb, TF_TIMESTAMP); + } else if (TCP_SEQ_BETWEEN(pcb->ts_lastacksent, seqno, seqno + tcplen)) { + pcb->ts_recent = lwip_ntohl(tsval); + } + /* Advance to next option (6 bytes already read) */ + tcp_optidx += LWIP_TCP_OPT_LEN_TS - 6; + break; +#endif /* LWIP_TCP_TIMESTAMPS */ +#if LWIP_TCP_SACK_OUT + case LWIP_TCP_OPT_SACK_PERM: + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: SACK_PERM\n")); + if (tcp_get_next_optbyte() != LWIP_TCP_OPT_LEN_SACK_PERM || (tcp_optidx - 2 + LWIP_TCP_OPT_LEN_SACK_PERM) > tcphdr_optlen) { + /* Bad length */ + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n")); + return; + } + /* TCP SACK_PERM option with valid length */ + if (flags & TCP_SYN) { + /* We only set it if we receive it in a SYN (or SYN+ACK) packet */ + tcp_set_flags(pcb, TF_SACK); + } + break; +#endif /* LWIP_TCP_SACK_OUT */ + default: + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: other\n")); + data = tcp_get_next_optbyte(); + if (data < 2) { + LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n")); + /* If the length field is zero, the options are malformed + and we don't process them further. */ + return; + } + /* All other options have a length field, so that we easily + can skip past them. */ + tcp_optidx += data - 2; + } + } + } +} + +void +tcp_trigger_input_pcb_close(void) +{ + recv_flags |= TF_CLOSED; +} + +#if LWIP_TCP_SACK_OUT +/** + * Called by tcp_receive() to add new SACK entry. + * + * The new SACK entry will be placed at the beginning of rcv_sacks[], as the newest one. + * Existing SACK entries will be "pushed back", to preserve their order. + * This is the behavior described in RFC 2018, section 4. + * + * @param pcb the tcp_pcb for which a segment arrived + * @param left the left side of the SACK (the first sequence number) + * @param right the right side of the SACK (the first sequence number past this SACK) + */ +static void +tcp_add_sack(struct tcp_pcb *pcb, u32_t left, u32_t right) +{ + u8_t i; + u8_t unused_idx; + + if ((pcb->flags & TF_SACK) == 0 || !TCP_SEQ_LT(left, right)) { + return; + } + + /* First, let's remove all SACKs that are no longer needed (because they overlap with the newest one), + while moving all other SACKs forward. + We run this loop for all entries, until we find the first invalid one. + There is no point checking after that. */ + for (i = unused_idx = 0; (i < LWIP_TCP_MAX_SACK_NUM) && LWIP_TCP_SACK_VALID(pcb, i); ++i) { + /* We only want to use SACK at [i] if it doesn't overlap with left:right range. + It does not overlap if its right side is before the newly added SACK, + or if its left side is after the newly added SACK. + NOTE: The equality should not really happen, but it doesn't hurt. */ + if (TCP_SEQ_LEQ(pcb->rcv_sacks[i].right, left) || TCP_SEQ_LEQ(right, pcb->rcv_sacks[i].left)) { + if (unused_idx != i) { + /* We don't need to copy if it's already in the right spot */ + pcb->rcv_sacks[unused_idx] = pcb->rcv_sacks[i]; + } + ++unused_idx; + } + } + + /* Now 'unused_idx' is the index of the first invalid SACK entry, + anywhere between 0 (no valid entries) and LWIP_TCP_MAX_SACK_NUM (all entries are valid). + We want to clear this and all following SACKs. + However, we will be adding another one in the front (and shifting everything else back). + So let's just iterate from the back, and set each entry to the one to the left if it's valid, + or to 0 if it is not. */ + for (i = LWIP_TCP_MAX_SACK_NUM - 1; i > 0; --i) { + /* [i] is the index we are setting, and the value should be at index [i-1], + or 0 if that index is unused (>= unused_idx). */ + if (i - 1 >= unused_idx) { + /* [i-1] is unused. Let's clear [i]. */ + pcb->rcv_sacks[i].left = pcb->rcv_sacks[i].right = 0; + } else { + pcb->rcv_sacks[i] = pcb->rcv_sacks[i - 1]; + } + } + + /* And now we can store the newest SACK */ + pcb->rcv_sacks[0].left = left; + pcb->rcv_sacks[0].right = right; +} + +/** + * Called to remove a range of SACKs. + * + * SACK entries will be removed or adjusted to not acknowledge any sequence + * numbers that are less than 'seq' passed. It not only invalidates entries, + * but also moves all entries that are still valid to the beginning. + * + * @param pcb the tcp_pcb to modify + * @param seq the lowest sequence number to keep in SACK entries + */ +static void +tcp_remove_sacks_lt(struct tcp_pcb *pcb, u32_t seq) +{ + u8_t i; + u8_t unused_idx; + + /* We run this loop for all entries, until we find the first invalid one. + There is no point checking after that. */ + for (i = unused_idx = 0; (i < LWIP_TCP_MAX_SACK_NUM) && LWIP_TCP_SACK_VALID(pcb, i); ++i) { + /* We only want to use SACK at index [i] if its right side is > 'seq'. */ + if (TCP_SEQ_GT(pcb->rcv_sacks[i].right, seq)) { + if (unused_idx != i) { + /* We only copy it if it's not in the right spot already. */ + pcb->rcv_sacks[unused_idx] = pcb->rcv_sacks[i]; + } + /* NOTE: It is possible that its left side is < 'seq', in which case we should adjust it. */ + if (TCP_SEQ_LT(pcb->rcv_sacks[unused_idx].left, seq)) { + pcb->rcv_sacks[unused_idx].left = seq; + } + ++unused_idx; + } + } + + /* We also need to invalidate everything from 'unused_idx' till the end */ + for (i = unused_idx; i < LWIP_TCP_MAX_SACK_NUM; ++i) { + pcb->rcv_sacks[i].left = pcb->rcv_sacks[i].right = 0; + } +} + +#if defined(TCP_OOSEQ_BYTES_LIMIT) || defined(TCP_OOSEQ_PBUFS_LIMIT) +/** + * Called to remove a range of SACKs. + * + * SACK entries will be removed or adjusted to not acknowledge any sequence + * numbers that are greater than (or equal to) 'seq' passed. It not only invalidates entries, + * but also moves all entries that are still valid to the beginning. + * + * @param pcb the tcp_pcb to modify + * @param seq the highest sequence number to keep in SACK entries + */ +static void +tcp_remove_sacks_gt(struct tcp_pcb *pcb, u32_t seq) +{ + u8_t i; + u8_t unused_idx; + + /* We run this loop for all entries, until we find the first invalid one. + There is no point checking after that. */ + for (i = unused_idx = 0; (i < LWIP_TCP_MAX_SACK_NUM) && LWIP_TCP_SACK_VALID(pcb, i); ++i) { + /* We only want to use SACK at index [i] if its left side is < 'seq'. */ + if (TCP_SEQ_LT(pcb->rcv_sacks[i].left, seq)) { + if (unused_idx != i) { + /* We only copy it if it's not in the right spot already. */ + pcb->rcv_sacks[unused_idx] = pcb->rcv_sacks[i]; + } + /* NOTE: It is possible that its right side is > 'seq', in which case we should adjust it. */ + if (TCP_SEQ_GT(pcb->rcv_sacks[unused_idx].right, seq)) { + pcb->rcv_sacks[unused_idx].right = seq; + } + ++unused_idx; + } + } + + /* We also need to invalidate everything from 'unused_idx' till the end */ + for (i = unused_idx; i < LWIP_TCP_MAX_SACK_NUM; ++i) { + pcb->rcv_sacks[i].left = pcb->rcv_sacks[i].right = 0; + } +} +#endif /* TCP_OOSEQ_BYTES_LIMIT || TCP_OOSEQ_PBUFS_LIMIT */ + +#endif /* LWIP_TCP_SACK_OUT */ + +#endif /* LWIP_TCP */ diff --git a/lib/lwip/core/tcp_out.c b/lib/lwip/core/tcp_out.c new file mode 100644 index 0000000000..64579ee5cb --- /dev/null +++ b/lib/lwip/core/tcp_out.c @@ -0,0 +1,2257 @@ +/** + * @file + * Transmission Control Protocol, outgoing traffic + * + * The output functions of TCP. + * + * There are two distinct ways for TCP segments to get sent: + * - queued data: these are segments transferring data or segments containing + * SYN or FIN (which both count as one sequence number). They are created as + * struct @ref pbuf together with a struct tcp_seg and enqueue to the + * unsent list of the pcb. They are sent by tcp_output: + * - @ref tcp_write : creates data segments + * - @ref tcp_split_unsent_seg : splits a data segment + * - @ref tcp_enqueue_flags : creates SYN-only or FIN-only segments + * - @ref tcp_output / tcp_output_segment : finalize the tcp header + * (e.g. sequence numbers, options, checksum) and output to IP + * - the various tcp_rexmit functions shuffle around segments between the + * unsent an unacked lists to retransmit them + * - tcp_create_segment and tcp_pbuf_prealloc allocate pbuf and + * segment for these functions + * - direct send: these segments don't contain data but control the connection + * behaviour. They are created as pbuf only and sent directly without + * enqueueing them: + * - @ref tcp_send_empty_ack sends an ACK-only segment + * - @ref tcp_rst sends a RST segment + * - @ref tcp_keepalive sends a keepalive segment + * - @ref tcp_zero_window_probe sends a window probe segment + * - tcp_output_alloc_header allocates a header-only pbuf for these functions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#include "lwip/opt.h" + +#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/priv/tcp_priv.h" +#include "lwip/def.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/inet_chksum.h" +#include "lwip/stats.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#if LWIP_TCP_TIMESTAMPS +#include "lwip/sys.h" +#endif + +#include <string.h> + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +/* Allow to add custom TCP header options by defining this hook */ +#ifdef LWIP_HOOK_TCP_OUT_TCPOPT_LENGTH +#define LWIP_TCP_OPT_LENGTH_SEGMENT(flags, pcb) LWIP_HOOK_TCP_OUT_TCPOPT_LENGTH(pcb, LWIP_TCP_OPT_LENGTH(flags)) +#else +#define LWIP_TCP_OPT_LENGTH_SEGMENT(flags, pcb) LWIP_TCP_OPT_LENGTH(flags) +#endif + +/* Define some copy-macros for checksum-on-copy so that the code looks + nicer by preventing too many ifdef's. */ +#if TCP_CHECKSUM_ON_COPY +#define TCP_DATA_COPY(dst, src, len, seg) do { \ + tcp_seg_add_chksum(LWIP_CHKSUM_COPY(dst, src, len), \ + len, &seg->chksum, &seg->chksum_swapped); \ + seg->flags |= TF_SEG_DATA_CHECKSUMMED; } while(0) +#define TCP_DATA_COPY2(dst, src, len, chksum, chksum_swapped) \ + tcp_seg_add_chksum(LWIP_CHKSUM_COPY(dst, src, len), len, chksum, chksum_swapped); +#else /* TCP_CHECKSUM_ON_COPY*/ +#define TCP_DATA_COPY(dst, src, len, seg) MEMCPY(dst, src, len) +#define TCP_DATA_COPY2(dst, src, len, chksum, chksum_swapped) MEMCPY(dst, src, len) +#endif /* TCP_CHECKSUM_ON_COPY*/ + +/** Define this to 1 for an extra check that the output checksum is valid + * (useful when the checksum is generated by the application, not the stack) */ +#ifndef TCP_CHECKSUM_ON_COPY_SANITY_CHECK +#define TCP_CHECKSUM_ON_COPY_SANITY_CHECK 0 +#endif +/* Allow to override the failure of sanity check from warning to e.g. hard failure */ +#if TCP_CHECKSUM_ON_COPY_SANITY_CHECK +#ifndef TCP_CHECKSUM_ON_COPY_SANITY_CHECK_FAIL +#define TCP_CHECKSUM_ON_COPY_SANITY_CHECK_FAIL(msg) LWIP_DEBUGF(TCP_DEBUG | LWIP_DBG_LEVEL_WARNING, msg) +#endif +#endif + +#if TCP_OVERSIZE +/** The size of segment pbufs created when TCP_OVERSIZE is enabled */ +#ifndef TCP_OVERSIZE_CALC_LENGTH +#define TCP_OVERSIZE_CALC_LENGTH(length) ((length) + TCP_OVERSIZE) +#endif +#endif + +/* Forward declarations.*/ +static err_t tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb, struct netif *netif); +static err_t tcp_output_control_segment_netif(const struct tcp_pcb *pcb, struct pbuf *p, + const ip_addr_t *src, const ip_addr_t *dst, + struct netif *netif); + +/* tcp_route: common code that returns a fixed bound netif or calls ip_route */ +static struct netif * +tcp_route(const struct tcp_pcb *pcb, const ip_addr_t *src, const ip_addr_t *dst) +{ + LWIP_UNUSED_ARG(src); /* in case IPv4-only and source-based routing is disabled */ + + if ((pcb != NULL) && (pcb->netif_idx != NETIF_NO_INDEX)) { + return netif_get_by_index(pcb->netif_idx); + } else { + return ip_route(src, dst); + } +} + +/** + * Create a TCP segment with prefilled header. + * + * Called by @ref tcp_write, @ref tcp_enqueue_flags and @ref tcp_split_unsent_seg + * + * @param pcb Protocol control block for the TCP connection. + * @param p pbuf that is used to hold the TCP header. + * @param hdrflags TCP flags for header. + * @param seqno TCP sequence number of this packet + * @param optflags options to include in TCP header + * @return a new tcp_seg pointing to p, or NULL. + * The TCP header is filled in except ackno and wnd. + * p is freed on failure. + */ +static struct tcp_seg * +tcp_create_segment(const struct tcp_pcb *pcb, struct pbuf *p, u8_t hdrflags, u32_t seqno, u8_t optflags) +{ + struct tcp_seg *seg; + u8_t optlen; + + LWIP_ASSERT("tcp_create_segment: invalid pcb", pcb != NULL); + LWIP_ASSERT("tcp_create_segment: invalid pbuf", p != NULL); + + optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(optflags, pcb); + + if ((seg = (struct tcp_seg *)memp_malloc(MEMP_TCP_SEG)) == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_create_segment: no memory.\n")); + pbuf_free(p); + return NULL; + } + seg->flags = optflags; + seg->next = NULL; + seg->p = p; + LWIP_ASSERT("p->tot_len >= optlen", p->tot_len >= optlen); + seg->len = p->tot_len - optlen; +#if TCP_OVERSIZE_DBGCHECK + seg->oversize_left = 0; +#endif /* TCP_OVERSIZE_DBGCHECK */ +#if TCP_CHECKSUM_ON_COPY + seg->chksum = 0; + seg->chksum_swapped = 0; + /* check optflags */ + LWIP_ASSERT("invalid optflags passed: TF_SEG_DATA_CHECKSUMMED", + (optflags & TF_SEG_DATA_CHECKSUMMED) == 0); +#endif /* TCP_CHECKSUM_ON_COPY */ + + /* build TCP header */ + if (pbuf_add_header(p, TCP_HLEN)) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_create_segment: no room for TCP header in pbuf.\n")); + TCP_STATS_INC(tcp.err); + tcp_seg_free(seg); + return NULL; + } + seg->tcphdr = (struct tcp_hdr *)seg->p->payload; + seg->tcphdr->src = lwip_htons(pcb->local_port); + seg->tcphdr->dest = lwip_htons(pcb->remote_port); + seg->tcphdr->seqno = lwip_htonl(seqno); + /* ackno is set in tcp_output */ + TCPH_HDRLEN_FLAGS_SET(seg->tcphdr, (5 + optlen / 4), hdrflags); + /* wnd and chksum are set in tcp_output */ + seg->tcphdr->urgp = 0; + return seg; +} + +/** + * Allocate a PBUF_RAM pbuf, perhaps with extra space at the end. + * + * This function is like pbuf_alloc(layer, length, PBUF_RAM) except + * there may be extra bytes available at the end. + * + * Called by @ref tcp_write + * + * @param layer flag to define header size. + * @param length size of the pbuf's payload. + * @param max_length maximum usable size of payload+oversize. + * @param oversize pointer to a u16_t that will receive the number of usable tail bytes. + * @param pcb The TCP connection that will enqueue the pbuf. + * @param apiflags API flags given to tcp_write. + * @param first_seg true when this pbuf will be used in the first enqueued segment. + */ +#if TCP_OVERSIZE +static struct pbuf * +tcp_pbuf_prealloc(pbuf_layer layer, u16_t length, u16_t max_length, + u16_t *oversize, const struct tcp_pcb *pcb, u8_t apiflags, + u8_t first_seg) +{ + struct pbuf *p; + u16_t alloc = length; + + LWIP_ASSERT("tcp_pbuf_prealloc: invalid oversize", oversize != NULL); + LWIP_ASSERT("tcp_pbuf_prealloc: invalid pcb", pcb != NULL); + +#if LWIP_NETIF_TX_SINGLE_PBUF + LWIP_UNUSED_ARG(max_length); + LWIP_UNUSED_ARG(pcb); + LWIP_UNUSED_ARG(apiflags); + LWIP_UNUSED_ARG(first_seg); + alloc = max_length; +#else /* LWIP_NETIF_TX_SINGLE_PBUF */ + if (length < max_length) { + /* Should we allocate an oversized pbuf, or just the minimum + * length required? If tcp_write is going to be called again + * before this segment is transmitted, we want the oversized + * buffer. If the segment will be transmitted immediately, we can + * save memory by allocating only length. We use a simple + * heuristic based on the following information: + * + * Did the user set TCP_WRITE_FLAG_MORE? + * + * Will the Nagle algorithm defer transmission of this segment? + */ + if ((apiflags & TCP_WRITE_FLAG_MORE) || + (!(pcb->flags & TF_NODELAY) && + (!first_seg || + pcb->unsent != NULL || + pcb->unacked != NULL))) { + alloc = LWIP_MIN(max_length, LWIP_MEM_ALIGN_SIZE(TCP_OVERSIZE_CALC_LENGTH(length))); + } + } +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + p = pbuf_alloc(layer, alloc, PBUF_RAM); + if (p == NULL) { + return NULL; + } + LWIP_ASSERT("need unchained pbuf", p->next == NULL); + *oversize = p->len - length; + /* trim p->len to the currently used size */ + p->len = p->tot_len = length; + return p; +} +#else /* TCP_OVERSIZE */ +#define tcp_pbuf_prealloc(layer, length, mx, os, pcb, api, fst) pbuf_alloc((layer), (length), PBUF_RAM) +#endif /* TCP_OVERSIZE */ + +#if TCP_CHECKSUM_ON_COPY +/** Add a checksum of newly added data to the segment. + * + * Called by tcp_write and tcp_split_unsent_seg. + */ +static void +tcp_seg_add_chksum(u16_t chksum, u16_t len, u16_t *seg_chksum, + u8_t *seg_chksum_swapped) +{ + u32_t helper; + /* add chksum to old chksum and fold to u16_t */ + helper = chksum + *seg_chksum; + chksum = FOLD_U32T(helper); + if ((len & 1) != 0) { + *seg_chksum_swapped = 1 - *seg_chksum_swapped; + chksum = SWAP_BYTES_IN_WORD(chksum); + } + *seg_chksum = chksum; +} +#endif /* TCP_CHECKSUM_ON_COPY */ + +/** Checks if tcp_write is allowed or not (checks state, snd_buf and snd_queuelen). + * + * @param pcb the tcp pcb to check for + * @param len length of data to send (checked agains snd_buf) + * @return ERR_OK if tcp_write is allowed to proceed, another err_t otherwise + */ +static err_t +tcp_write_checks(struct tcp_pcb *pcb, u16_t len) +{ + LWIP_ASSERT("tcp_write_checks: invalid pcb", pcb != NULL); + + /* connection is in invalid state for data transmission? */ + if ((pcb->state != ESTABLISHED) && + (pcb->state != CLOSE_WAIT) && + (pcb->state != SYN_SENT) && + (pcb->state != SYN_RCVD)) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_STATE | LWIP_DBG_LEVEL_SEVERE, ("tcp_write() called in invalid state\n")); + return ERR_CONN; + } else if (len == 0) { + return ERR_OK; + } + + /* fail on too much data */ + if (len > pcb->snd_buf) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("tcp_write: too much data (len=%"U16_F" > snd_buf=%"TCPWNDSIZE_F")\n", + len, pcb->snd_buf)); + tcp_set_flags(pcb, TF_NAGLEMEMERR); + return ERR_MEM; + } + + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_write: queuelen: %"TCPWNDSIZE_F"\n", (tcpwnd_size_t)pcb->snd_queuelen)); + + /* If total number of pbufs on the unsent/unacked queues exceeds the + * configured maximum, return an error */ + /* check for configured max queuelen and possible overflow */ + if (pcb->snd_queuelen >= LWIP_MIN(TCP_SND_QUEUELEN, (TCP_SNDQUEUELEN_OVERFLOW + 1))) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("tcp_write: too long queue %"U16_F" (max %"U16_F")\n", + pcb->snd_queuelen, (u16_t)TCP_SND_QUEUELEN)); + TCP_STATS_INC(tcp.memerr); + tcp_set_flags(pcb, TF_NAGLEMEMERR); + return ERR_MEM; + } + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_write: pbufs on queue => at least one queue non-empty", + pcb->unacked != NULL || pcb->unsent != NULL); + } else { + LWIP_ASSERT("tcp_write: no pbufs on queue => both queues empty", + pcb->unacked == NULL && pcb->unsent == NULL); + } + return ERR_OK; +} + +/** + * @ingroup tcp_raw + * Write data for sending (but does not send it immediately). + * + * It waits in the expectation of more data being sent soon (as + * it can send them more efficiently by combining them together). + * To prompt the system to send data now, call tcp_output() after + * calling tcp_write(). + * + * This function enqueues the data pointed to by the argument dataptr. The length of + * the data is passed as the len parameter. The apiflags can be one or more of: + * - TCP_WRITE_FLAG_COPY: indicates whether the new memory should be allocated + * for the data to be copied into. If this flag is not given, no new memory + * should be allocated and the data should only be referenced by pointer. This + * also means that the memory behind dataptr must not change until the data is + * ACKed by the remote host + * - TCP_WRITE_FLAG_MORE: indicates that more data follows. If this is omitted, + * the PSH flag is set in the last segment created by this call to tcp_write. + * If this flag is given, the PSH flag is not set. + * + * The tcp_write() function will fail and return ERR_MEM if the length + * of the data exceeds the current send buffer size or if the length of + * the queue of outgoing segment is larger than the upper limit defined + * in lwipopts.h. The number of bytes available in the output queue can + * be retrieved with the tcp_sndbuf() function. + * + * The proper way to use this function is to call the function with at + * most tcp_sndbuf() bytes of data. If the function returns ERR_MEM, + * the application should wait until some of the currently enqueued + * data has been successfully received by the other host and try again. + * + * @param pcb Protocol control block for the TCP connection to enqueue data for. + * @param arg Pointer to the data to be enqueued for sending. + * @param len Data length in bytes + * @param apiflags combination of following flags : + * - TCP_WRITE_FLAG_COPY (0x01) data will be copied into memory belonging to the stack + * - TCP_WRITE_FLAG_MORE (0x02) for TCP connection, PSH flag will not be set on last segment sent, + * @return ERR_OK if enqueued, another err_t on error + */ +err_t +tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t apiflags) +{ + struct pbuf *concat_p = NULL; + struct tcp_seg *last_unsent = NULL, *seg = NULL, *prev_seg = NULL, *queue = NULL; + u16_t pos = 0; /* position in 'arg' data */ + u16_t queuelen; + u8_t optlen; + u8_t optflags = 0; +#if TCP_OVERSIZE + u16_t oversize = 0; + u16_t oversize_used = 0; +#if TCP_OVERSIZE_DBGCHECK + u16_t oversize_add = 0; +#endif /* TCP_OVERSIZE_DBGCHECK*/ +#endif /* TCP_OVERSIZE */ + u16_t extendlen = 0; +#if TCP_CHECKSUM_ON_COPY + u16_t concat_chksum = 0; + u8_t concat_chksum_swapped = 0; + u16_t concat_chksummed = 0; +#endif /* TCP_CHECKSUM_ON_COPY */ + err_t err; + u16_t mss_local; + + LWIP_ERROR("tcp_write: invalid pcb", pcb != NULL, return ERR_ARG); + + /* don't allocate segments bigger than half the maximum window we ever received */ + mss_local = LWIP_MIN(pcb->mss, TCPWND_MIN16(pcb->snd_wnd_max / 2)); + mss_local = mss_local ? mss_local : pcb->mss; + + LWIP_ASSERT_CORE_LOCKED(); + +#if LWIP_NETIF_TX_SINGLE_PBUF + /* Always copy to try to create single pbufs for TX */ + apiflags |= TCP_WRITE_FLAG_COPY; +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_write(pcb=%p, data=%p, len=%"U16_F", apiflags=%"U16_F")\n", + (void *)pcb, arg, len, (u16_t)apiflags)); + LWIP_ERROR("tcp_write: arg == NULL (programmer violates API)", + arg != NULL, return ERR_ARG;); + + err = tcp_write_checks(pcb, len); + if (err != ERR_OK) { + return err; + } + queuelen = pcb->snd_queuelen; + +#if LWIP_TCP_TIMESTAMPS + if ((pcb->flags & TF_TIMESTAMP)) { + /* Make sure the timestamp option is only included in data segments if we + agreed about it with the remote host. */ + optflags = TF_SEG_OPTS_TS; + optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(TF_SEG_OPTS_TS, pcb); + /* ensure that segments can hold at least one data byte... */ + mss_local = LWIP_MAX(mss_local, LWIP_TCP_OPT_LEN_TS + 1); + } else +#endif /* LWIP_TCP_TIMESTAMPS */ + { + optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(0, pcb); + } + + + /* + * TCP segmentation is done in three phases with increasing complexity: + * + * 1. Copy data directly into an oversized pbuf. + * 2. Chain a new pbuf to the end of pcb->unsent. + * 3. Create new segments. + * + * We may run out of memory at any point. In that case we must + * return ERR_MEM and not change anything in pcb. Therefore, all + * changes are recorded in local variables and committed at the end + * of the function. Some pcb fields are maintained in local copies: + * + * queuelen = pcb->snd_queuelen + * oversize = pcb->unsent_oversize + * + * These variables are set consistently by the phases: + * + * seg points to the last segment tampered with. + * + * pos records progress as data is segmented. + */ + + /* Find the tail of the unsent queue. */ + if (pcb->unsent != NULL) { + u16_t space; + u16_t unsent_optlen; + + /* @todo: this could be sped up by keeping last_unsent in the pcb */ + for (last_unsent = pcb->unsent; last_unsent->next != NULL; + last_unsent = last_unsent->next); + + /* Usable space at the end of the last unsent segment */ + unsent_optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(last_unsent->flags, pcb); + LWIP_ASSERT("mss_local is too small", mss_local >= last_unsent->len + unsent_optlen); + space = mss_local - (last_unsent->len + unsent_optlen); + + /* + * Phase 1: Copy data directly into an oversized pbuf. + * + * The number of bytes copied is recorded in the oversize_used + * variable. The actual copying is done at the bottom of the + * function. + */ +#if TCP_OVERSIZE +#if TCP_OVERSIZE_DBGCHECK + /* check that pcb->unsent_oversize matches last_unsent->oversize_left */ + LWIP_ASSERT("unsent_oversize mismatch (pcb vs. last_unsent)", + pcb->unsent_oversize == last_unsent->oversize_left); +#endif /* TCP_OVERSIZE_DBGCHECK */ + oversize = pcb->unsent_oversize; + if (oversize > 0) { + LWIP_ASSERT("inconsistent oversize vs. space", oversize <= space); + seg = last_unsent; + oversize_used = LWIP_MIN(space, LWIP_MIN(oversize, len)); + pos += oversize_used; + oversize -= oversize_used; + space -= oversize_used; + } + /* now we are either finished or oversize is zero */ + LWIP_ASSERT("inconsistent oversize vs. len", (oversize == 0) || (pos == len)); +#endif /* TCP_OVERSIZE */ + +#if !LWIP_NETIF_TX_SINGLE_PBUF + /* + * Phase 2: Chain a new pbuf to the end of pcb->unsent. + * + * As an exception when NOT copying the data, if the given data buffer + * directly follows the last unsent data buffer in memory, extend the last + * ROM pbuf reference to the buffer, thus saving a ROM pbuf allocation. + * + * We don't extend segments containing SYN/FIN flags or options + * (len==0). The new pbuf is kept in concat_p and pbuf_cat'ed at + * the end. + * + * This phase is skipped for LWIP_NETIF_TX_SINGLE_PBUF as we could only execute + * it after rexmit puts a segment from unacked to unsent and at this point, + * oversize info is lost. + */ + if ((pos < len) && (space > 0) && (last_unsent->len > 0)) { + u16_t seglen = LWIP_MIN(space, len - pos); + seg = last_unsent; + + /* Create a pbuf with a copy or reference to seglen bytes. We + * can use PBUF_RAW here since the data appears in the middle of + * a segment. A header will never be prepended. */ + if (apiflags & TCP_WRITE_FLAG_COPY) { + /* Data is copied */ + if ((concat_p = tcp_pbuf_prealloc(PBUF_RAW, seglen, space, &oversize, pcb, apiflags, 1)) == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("tcp_write : could not allocate memory for pbuf copy size %"U16_F"\n", + seglen)); + goto memerr; + } +#if TCP_OVERSIZE_DBGCHECK + oversize_add = oversize; +#endif /* TCP_OVERSIZE_DBGCHECK */ + TCP_DATA_COPY2(concat_p->payload, (const u8_t *)arg + pos, seglen, &concat_chksum, &concat_chksum_swapped); +#if TCP_CHECKSUM_ON_COPY + concat_chksummed += seglen; +#endif /* TCP_CHECKSUM_ON_COPY */ + queuelen += pbuf_clen(concat_p); + } else { + /* Data is not copied */ + /* If the last unsent pbuf is of type PBUF_ROM, try to extend it. */ + struct pbuf *p; + for (p = last_unsent->p; p->next != NULL; p = p->next); + if (((p->type_internal & (PBUF_TYPE_FLAG_STRUCT_DATA_CONTIGUOUS | PBUF_TYPE_FLAG_DATA_VOLATILE)) == 0) && + (const u8_t *)p->payload + p->len == (const u8_t *)arg) { + LWIP_ASSERT("tcp_write: ROM pbufs cannot be oversized", pos == 0); + extendlen = seglen; + } else { + if ((concat_p = pbuf_alloc(PBUF_RAW, seglen, PBUF_ROM)) == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("tcp_write: could not allocate memory for zero-copy pbuf\n")); + goto memerr; + } + /* reference the non-volatile payload data */ + ((struct pbuf_rom *)concat_p)->payload = (const u8_t *)arg + pos; + queuelen += pbuf_clen(concat_p); + } +#if TCP_CHECKSUM_ON_COPY + /* calculate the checksum of nocopy-data */ + tcp_seg_add_chksum(~inet_chksum((const u8_t *)arg + pos, seglen), seglen, + &concat_chksum, &concat_chksum_swapped); + concat_chksummed += seglen; +#endif /* TCP_CHECKSUM_ON_COPY */ + } + + pos += seglen; + } +#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */ + } else { +#if TCP_OVERSIZE + LWIP_ASSERT("unsent_oversize mismatch (pcb->unsent is NULL)", + pcb->unsent_oversize == 0); +#endif /* TCP_OVERSIZE */ + } + + /* + * Phase 3: Create new segments. + * + * The new segments are chained together in the local 'queue' + * variable, ready to be appended to pcb->unsent. + */ + while (pos < len) { + struct pbuf *p; + u16_t left = len - pos; + u16_t max_len = mss_local - optlen; + u16_t seglen = LWIP_MIN(left, max_len); +#if TCP_CHECKSUM_ON_COPY + u16_t chksum = 0; + u8_t chksum_swapped = 0; +#endif /* TCP_CHECKSUM_ON_COPY */ + + if (apiflags & TCP_WRITE_FLAG_COPY) { + /* If copy is set, memory should be allocated and data copied + * into pbuf */ + if ((p = tcp_pbuf_prealloc(PBUF_TRANSPORT, seglen + optlen, mss_local, &oversize, pcb, apiflags, queue == NULL)) == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_write : could not allocate memory for pbuf copy size %"U16_F"\n", seglen)); + goto memerr; + } + LWIP_ASSERT("tcp_write: check that first pbuf can hold the complete seglen", + (p->len >= seglen)); + TCP_DATA_COPY2((char *)p->payload + optlen, (const u8_t *)arg + pos, seglen, &chksum, &chksum_swapped); + } else { + /* Copy is not set: First allocate a pbuf for holding the data. + * Since the referenced data is available at least until it is + * sent out on the link (as it has to be ACKed by the remote + * party) we can safely use PBUF_ROM instead of PBUF_REF here. + */ + struct pbuf *p2; +#if TCP_OVERSIZE + LWIP_ASSERT("oversize == 0", oversize == 0); +#endif /* TCP_OVERSIZE */ + if ((p2 = pbuf_alloc(PBUF_TRANSPORT, seglen, PBUF_ROM)) == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_write: could not allocate memory for zero-copy pbuf\n")); + goto memerr; + } +#if TCP_CHECKSUM_ON_COPY + /* calculate the checksum of nocopy-data */ + chksum = ~inet_chksum((const u8_t *)arg + pos, seglen); + if (seglen & 1) { + chksum_swapped = 1; + chksum = SWAP_BYTES_IN_WORD(chksum); + } +#endif /* TCP_CHECKSUM_ON_COPY */ + /* reference the non-volatile payload data */ + ((struct pbuf_rom *)p2)->payload = (const u8_t *)arg + pos; + + /* Second, allocate a pbuf for the headers. */ + if ((p = pbuf_alloc(PBUF_TRANSPORT, optlen, PBUF_RAM)) == NULL) { + /* If allocation fails, we have to deallocate the data pbuf as + * well. */ + pbuf_free(p2); + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_write: could not allocate memory for header pbuf\n")); + goto memerr; + } + /* Concatenate the headers and data pbufs together. */ + pbuf_cat(p/*header*/, p2/*data*/); + } + + queuelen += pbuf_clen(p); + + /* Now that there are more segments queued, we check again if the + * length of the queue exceeds the configured maximum or + * overflows. */ + if (queuelen > LWIP_MIN(TCP_SND_QUEUELEN, TCP_SNDQUEUELEN_OVERFLOW)) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_write: queue too long %"U16_F" (%d)\n", + queuelen, (int)TCP_SND_QUEUELEN)); + pbuf_free(p); + goto memerr; + } + + if ((seg = tcp_create_segment(pcb, p, 0, pcb->snd_lbb + pos, optflags)) == NULL) { + goto memerr; + } +#if TCP_OVERSIZE_DBGCHECK + seg->oversize_left = oversize; +#endif /* TCP_OVERSIZE_DBGCHECK */ +#if TCP_CHECKSUM_ON_COPY + seg->chksum = chksum; + seg->chksum_swapped = chksum_swapped; + seg->flags |= TF_SEG_DATA_CHECKSUMMED; +#endif /* TCP_CHECKSUM_ON_COPY */ + + /* first segment of to-be-queued data? */ + if (queue == NULL) { + queue = seg; + } else { + /* Attach the segment to the end of the queued segments */ + LWIP_ASSERT("prev_seg != NULL", prev_seg != NULL); + prev_seg->next = seg; + } + /* remember last segment of to-be-queued data for next iteration */ + prev_seg = seg; + + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_TRACE, ("tcp_write: queueing %"U32_F":%"U32_F"\n", + lwip_ntohl(seg->tcphdr->seqno), + lwip_ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg))); + + pos += seglen; + } + + /* + * All three segmentation phases were successful. We can commit the + * transaction. + */ +#if TCP_OVERSIZE_DBGCHECK + if ((last_unsent != NULL) && (oversize_add != 0)) { + last_unsent->oversize_left += oversize_add; + } +#endif /* TCP_OVERSIZE_DBGCHECK */ + + /* + * Phase 1: If data has been added to the preallocated tail of + * last_unsent, we update the length fields of the pbuf chain. + */ +#if TCP_OVERSIZE + if (oversize_used > 0) { + struct pbuf *p; + /* Bump tot_len of whole chain, len of tail */ + for (p = last_unsent->p; p; p = p->next) { + p->tot_len += oversize_used; + if (p->next == NULL) { + TCP_DATA_COPY((char *)p->payload + p->len, arg, oversize_used, last_unsent); + p->len += oversize_used; + } + } + last_unsent->len += oversize_used; +#if TCP_OVERSIZE_DBGCHECK + LWIP_ASSERT("last_unsent->oversize_left >= oversize_used", + last_unsent->oversize_left >= oversize_used); + last_unsent->oversize_left -= oversize_used; +#endif /* TCP_OVERSIZE_DBGCHECK */ + } + pcb->unsent_oversize = oversize; +#endif /* TCP_OVERSIZE */ + + /* + * Phase 2: concat_p can be concatenated onto last_unsent->p, unless we + * determined that the last ROM pbuf can be extended to include the new data. + */ + if (concat_p != NULL) { + LWIP_ASSERT("tcp_write: cannot concatenate when pcb->unsent is empty", + (last_unsent != NULL)); + pbuf_cat(last_unsent->p, concat_p); + last_unsent->len += concat_p->tot_len; + } else if (extendlen > 0) { + struct pbuf *p; + LWIP_ASSERT("tcp_write: extension of reference requires reference", + last_unsent != NULL && last_unsent->p != NULL); + for (p = last_unsent->p; p->next != NULL; p = p->next) { + p->tot_len += extendlen; + } + p->tot_len += extendlen; + p->len += extendlen; + last_unsent->len += extendlen; + } + +#if TCP_CHECKSUM_ON_COPY + if (concat_chksummed) { + LWIP_ASSERT("tcp_write: concat checksum needs concatenated data", + concat_p != NULL || extendlen > 0); + /*if concat checksumm swapped - swap it back */ + if (concat_chksum_swapped) { + concat_chksum = SWAP_BYTES_IN_WORD(concat_chksum); + } + tcp_seg_add_chksum(concat_chksum, concat_chksummed, &last_unsent->chksum, + &last_unsent->chksum_swapped); + last_unsent->flags |= TF_SEG_DATA_CHECKSUMMED; + } +#endif /* TCP_CHECKSUM_ON_COPY */ + + /* + * Phase 3: Append queue to pcb->unsent. Queue may be NULL, but that + * is harmless + */ + if (last_unsent == NULL) { + pcb->unsent = queue; + } else { + last_unsent->next = queue; + } + + /* + * Finally update the pcb state. + */ + pcb->snd_lbb += len; + pcb->snd_buf -= len; + pcb->snd_queuelen = queuelen; + + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_write: %"S16_F" (after enqueued)\n", + pcb->snd_queuelen)); + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_write: valid queue length", + pcb->unacked != NULL || pcb->unsent != NULL); + } + + /* Set the PSH flag in the last segment that we enqueued. */ + if (seg != NULL && seg->tcphdr != NULL && ((apiflags & TCP_WRITE_FLAG_MORE) == 0)) { + TCPH_SET_FLAG(seg->tcphdr, TCP_PSH); + } + + return ERR_OK; +memerr: + tcp_set_flags(pcb, TF_NAGLEMEMERR); + TCP_STATS_INC(tcp.memerr); + + if (concat_p != NULL) { + pbuf_free(concat_p); + } + if (queue != NULL) { + tcp_segs_free(queue); + } + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_write: valid queue length", pcb->unacked != NULL || + pcb->unsent != NULL); + } + LWIP_DEBUGF(TCP_QLEN_DEBUG | LWIP_DBG_STATE, ("tcp_write: %"S16_F" (with mem err)\n", pcb->snd_queuelen)); + return ERR_MEM; +} + +/** + * Split segment on the head of the unsent queue. If return is not + * ERR_OK, existing head remains intact + * + * The split is accomplished by creating a new TCP segment and pbuf + * which holds the remainder payload after the split. The original + * pbuf is trimmed to new length. This allows splitting of read-only + * pbufs + * + * @param pcb the tcp_pcb for which to split the unsent head + * @param split the amount of payload to remain in the head + */ +err_t +tcp_split_unsent_seg(struct tcp_pcb *pcb, u16_t split) +{ + struct tcp_seg *seg = NULL, *useg = NULL; + struct pbuf *p = NULL; + u8_t optlen; + u8_t optflags; + u8_t split_flags; + u8_t remainder_flags; + u16_t remainder; + u16_t offset; +#if TCP_CHECKSUM_ON_COPY + u16_t chksum = 0; + u8_t chksum_swapped = 0; + struct pbuf *q; +#endif /* TCP_CHECKSUM_ON_COPY */ + + LWIP_ASSERT("tcp_split_unsent_seg: invalid pcb", pcb != NULL); + + useg = pcb->unsent; + if (useg == NULL) { + return ERR_MEM; + } + + if (split == 0) { + LWIP_ASSERT("Can't split segment into length 0", 0); + return ERR_VAL; + } + + if (useg->len <= split) { + return ERR_OK; + } + + LWIP_ASSERT("split <= mss", split <= pcb->mss); + LWIP_ASSERT("useg->len > 0", useg->len > 0); + + /* We should check that we don't exceed TCP_SND_QUEUELEN but we need + * to split this packet so we may actually exceed the max value by + * one! + */ + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue: split_unsent_seg: %u\n", (unsigned int)pcb->snd_queuelen)); + + optflags = useg->flags; +#if TCP_CHECKSUM_ON_COPY + /* Remove since checksum is not stored until after tcp_create_segment() */ + optflags &= ~TF_SEG_DATA_CHECKSUMMED; +#endif /* TCP_CHECKSUM_ON_COPY */ + optlen = LWIP_TCP_OPT_LENGTH(optflags); + remainder = useg->len - split; + + /* Create new pbuf for the remainder of the split */ + p = pbuf_alloc(PBUF_TRANSPORT, remainder + optlen, PBUF_RAM); + if (p == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("tcp_split_unsent_seg: could not allocate memory for pbuf remainder %u\n", remainder)); + goto memerr; + } + + /* Offset into the original pbuf is past TCP/IP headers, options, and split amount */ + offset = useg->p->tot_len - useg->len + split; + /* Copy remainder into new pbuf, headers and options will not be filled out */ + if (pbuf_copy_partial(useg->p, (u8_t *)p->payload + optlen, remainder, offset ) != remainder) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("tcp_split_unsent_seg: could not copy pbuf remainder %u\n", remainder)); + goto memerr; + } +#if TCP_CHECKSUM_ON_COPY + /* calculate the checksum on remainder data */ + tcp_seg_add_chksum(~inet_chksum((const u8_t *)p->payload + optlen, remainder), remainder, + &chksum, &chksum_swapped); +#endif /* TCP_CHECKSUM_ON_COPY */ + + /* Options are created when calling tcp_output() */ + + /* Migrate flags from original segment */ + split_flags = TCPH_FLAGS(useg->tcphdr); + remainder_flags = 0; /* ACK added in tcp_output() */ + + if (split_flags & TCP_PSH) { + split_flags &= ~TCP_PSH; + remainder_flags |= TCP_PSH; + } + if (split_flags & TCP_FIN) { + split_flags &= ~TCP_FIN; + remainder_flags |= TCP_FIN; + } + /* SYN should be left on split, RST should not be present with data */ + + seg = tcp_create_segment(pcb, p, remainder_flags, lwip_ntohl(useg->tcphdr->seqno) + split, optflags); + if (seg == NULL) { + p = NULL; /* Freed by tcp_create_segment */ + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("tcp_split_unsent_seg: could not create new TCP segment\n")); + goto memerr; + } + +#if TCP_CHECKSUM_ON_COPY + seg->chksum = chksum; + seg->chksum_swapped = chksum_swapped; + seg->flags |= TF_SEG_DATA_CHECKSUMMED; +#endif /* TCP_CHECKSUM_ON_COPY */ + + /* Remove this segment from the queue since trimming it may free pbufs */ + pcb->snd_queuelen -= pbuf_clen(useg->p); + + /* Trim the original pbuf into our split size. At this point our remainder segment must be setup + successfully because we are modifying the original segment */ + pbuf_realloc(useg->p, useg->p->tot_len - remainder); + useg->len -= remainder; + TCPH_SET_FLAG(useg->tcphdr, split_flags); +#if TCP_OVERSIZE_DBGCHECK + /* By trimming, realloc may have actually shrunk the pbuf, so clear oversize_left */ + useg->oversize_left = 0; +#endif /* TCP_OVERSIZE_DBGCHECK */ + + /* Add back to the queue with new trimmed pbuf */ + pcb->snd_queuelen += pbuf_clen(useg->p); + +#if TCP_CHECKSUM_ON_COPY + /* The checksum on the split segment is now incorrect. We need to re-run it over the split */ + useg->chksum = 0; + useg->chksum_swapped = 0; + q = useg->p; + offset = q->tot_len - useg->len; /* Offset due to exposed headers */ + + /* Advance to the pbuf where the offset ends */ + while (q != NULL && offset > q->len) { + offset -= q->len; + q = q->next; + } + LWIP_ASSERT("Found start of payload pbuf", q != NULL); + /* Checksum the first payload pbuf accounting for offset, then other pbufs are all payload */ + for (; q != NULL; offset = 0, q = q->next) { + tcp_seg_add_chksum(~inet_chksum((const u8_t *)q->payload + offset, q->len - offset), q->len - offset, + &useg->chksum, &useg->chksum_swapped); + } +#endif /* TCP_CHECKSUM_ON_COPY */ + + /* Update number of segments on the queues. Note that length now may + * exceed TCP_SND_QUEUELEN! We don't have to touch pcb->snd_buf + * because the total amount of data is constant when packet is split */ + pcb->snd_queuelen += pbuf_clen(seg->p); + + /* Finally insert remainder into queue after split (which stays head) */ + seg->next = useg->next; + useg->next = seg; + +#if TCP_OVERSIZE + /* If remainder is last segment on the unsent, ensure we clear the oversize amount + * because the remainder is always sized to the exact remaining amount */ + if (seg->next == NULL) { + pcb->unsent_oversize = 0; + } +#endif /* TCP_OVERSIZE */ + + return ERR_OK; +memerr: + TCP_STATS_INC(tcp.memerr); + + LWIP_ASSERT("seg == NULL", seg == NULL); + if (p != NULL) { + pbuf_free(p); + } + + return ERR_MEM; +} + +/** + * Called by tcp_close() to send a segment including FIN flag but not data. + * This FIN may be added to an existing segment or a new, otherwise empty + * segment is enqueued. + * + * @param pcb the tcp_pcb over which to send a segment + * @return ERR_OK if sent, another err_t otherwise + */ +err_t +tcp_send_fin(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("tcp_send_fin: invalid pcb", pcb != NULL); + + /* first, try to add the fin to the last unsent segment */ + if (pcb->unsent != NULL) { + struct tcp_seg *last_unsent; + for (last_unsent = pcb->unsent; last_unsent->next != NULL; + last_unsent = last_unsent->next); + + if ((TCPH_FLAGS(last_unsent->tcphdr) & (TCP_SYN | TCP_FIN | TCP_RST)) == 0) { + /* no SYN/FIN/RST flag in the header, we can add the FIN flag */ + TCPH_SET_FLAG(last_unsent->tcphdr, TCP_FIN); + tcp_set_flags(pcb, TF_FIN); + return ERR_OK; + } + } + /* no data, no length, flags, copy=1, no optdata */ + return tcp_enqueue_flags(pcb, TCP_FIN); +} + +/** + * Enqueue SYN or FIN for transmission. + * + * Called by @ref tcp_connect, tcp_listen_input, and @ref tcp_close + * (via @ref tcp_send_fin) + * + * @param pcb Protocol control block for the TCP connection. + * @param flags TCP header flags to set in the outgoing segment. + */ +err_t +tcp_enqueue_flags(struct tcp_pcb *pcb, u8_t flags) +{ + struct pbuf *p; + struct tcp_seg *seg; + u8_t optflags = 0; + u8_t optlen = 0; + + LWIP_ASSERT("tcp_enqueue_flags: need either TCP_SYN or TCP_FIN in flags (programmer violates API)", + (flags & (TCP_SYN | TCP_FIN)) != 0); + LWIP_ASSERT("tcp_enqueue_flags: invalid pcb", pcb != NULL); + + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue_flags: queuelen: %"U16_F"\n", (u16_t)pcb->snd_queuelen)); + + /* No need to check pcb->snd_queuelen if only SYN or FIN are allowed! */ + + /* Get options for this segment. This is a special case since this is the + only place where a SYN can be sent. */ + if (flags & TCP_SYN) { + optflags = TF_SEG_OPTS_MSS; +#if LWIP_WND_SCALE + if ((pcb->state != SYN_RCVD) || (pcb->flags & TF_WND_SCALE)) { + /* In a <SYN,ACK> (sent in state SYN_RCVD), the window scale option may only + be sent if we received a window scale option from the remote host. */ + optflags |= TF_SEG_OPTS_WND_SCALE; + } +#endif /* LWIP_WND_SCALE */ +#if LWIP_TCP_SACK_OUT + if ((pcb->state != SYN_RCVD) || (pcb->flags & TF_SACK)) { + /* In a <SYN,ACK> (sent in state SYN_RCVD), the SACK_PERM option may only + be sent if we received a SACK_PERM option from the remote host. */ + optflags |= TF_SEG_OPTS_SACK_PERM; + } +#endif /* LWIP_TCP_SACK_OUT */ + } +#if LWIP_TCP_TIMESTAMPS + if ((pcb->flags & TF_TIMESTAMP) || ((flags & TCP_SYN) && (pcb->state != SYN_RCVD))) { + /* Make sure the timestamp option is only included in data segments if we + agreed about it with the remote host (and in active open SYN segments). */ + optflags |= TF_SEG_OPTS_TS; + } +#endif /* LWIP_TCP_TIMESTAMPS */ + optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(optflags, pcb); + + /* Allocate pbuf with room for TCP header + options */ + if ((p = pbuf_alloc(PBUF_TRANSPORT, optlen, PBUF_RAM)) == NULL) { + tcp_set_flags(pcb, TF_NAGLEMEMERR); + TCP_STATS_INC(tcp.memerr); + return ERR_MEM; + } + LWIP_ASSERT("tcp_enqueue_flags: check that first pbuf can hold optlen", + (p->len >= optlen)); + + /* Allocate memory for tcp_seg, and fill in fields. */ + if ((seg = tcp_create_segment(pcb, p, flags, pcb->snd_lbb, optflags)) == NULL) { + tcp_set_flags(pcb, TF_NAGLEMEMERR); + TCP_STATS_INC(tcp.memerr); + return ERR_MEM; + } + LWIP_ASSERT("seg->tcphdr not aligned", ((mem_ptr_t)seg->tcphdr % LWIP_MIN(MEM_ALIGNMENT, 4)) == 0); + LWIP_ASSERT("tcp_enqueue_flags: invalid segment length", seg->len == 0); + + LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_TRACE, + ("tcp_enqueue_flags: queueing %"U32_F":%"U32_F" (0x%"X16_F")\n", + lwip_ntohl(seg->tcphdr->seqno), + lwip_ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg), + (u16_t)flags)); + + /* Now append seg to pcb->unsent queue */ + if (pcb->unsent == NULL) { + pcb->unsent = seg; + } else { + struct tcp_seg *useg; + for (useg = pcb->unsent; useg->next != NULL; useg = useg->next); + useg->next = seg; + } +#if TCP_OVERSIZE + /* The new unsent tail has no space */ + pcb->unsent_oversize = 0; +#endif /* TCP_OVERSIZE */ + + /* SYN and FIN bump the sequence number */ + if ((flags & TCP_SYN) || (flags & TCP_FIN)) { + pcb->snd_lbb++; + /* optlen does not influence snd_buf */ + } + if (flags & TCP_FIN) { + tcp_set_flags(pcb, TF_FIN); + } + + /* update number of segments on the queues */ + pcb->snd_queuelen += pbuf_clen(seg->p); + LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue_flags: %"S16_F" (after enqueued)\n", pcb->snd_queuelen)); + if (pcb->snd_queuelen != 0) { + LWIP_ASSERT("tcp_enqueue_flags: invalid queue length", + pcb->unacked != NULL || pcb->unsent != NULL); + } + + return ERR_OK; +} + +#if LWIP_TCP_TIMESTAMPS +/* Build a timestamp option (12 bytes long) at the specified options pointer) + * + * @param pcb tcp_pcb + * @param opts option pointer where to store the timestamp option + */ +static void +tcp_build_timestamp_option(const struct tcp_pcb *pcb, u32_t *opts) +{ + LWIP_ASSERT("tcp_build_timestamp_option: invalid pcb", pcb != NULL); + + /* Pad with two NOP options to make everything nicely aligned */ + opts[0] = PP_HTONL(0x0101080A); + opts[1] = lwip_htonl(sys_now()); + opts[2] = lwip_htonl(pcb->ts_recent); +} +#endif + +#if LWIP_TCP_SACK_OUT +/** + * Calculates the number of SACK entries that should be generated. + * It takes into account whether TF_SACK flag is set, + * the number of SACK entries in tcp_pcb that are valid, + * as well as the available options size. + * + * @param pcb tcp_pcb + * @param optlen the length of other TCP options (in bytes) + * @return the number of SACK ranges that can be used + */ +static u8_t +tcp_get_num_sacks(const struct tcp_pcb *pcb, u8_t optlen) +{ + u8_t num_sacks = 0; + + LWIP_ASSERT("tcp_get_num_sacks: invalid pcb", pcb != NULL); + + if (pcb->flags & TF_SACK) { + u8_t i; + + /* The first SACK takes up 12 bytes (it includes SACK header and two NOP options), + each additional one - 8 bytes. */ + optlen += 12; + + /* Max options size = 40, number of SACK array entries = LWIP_TCP_MAX_SACK_NUM */ + for (i = 0; (i < LWIP_TCP_MAX_SACK_NUM) && (optlen <= TCP_MAX_OPTION_BYTES) && + LWIP_TCP_SACK_VALID(pcb, i); ++i) { + ++num_sacks; + optlen += 8; + } + } + + return num_sacks; +} + +/** Build a SACK option (12 or more bytes long) at the specified options pointer) + * + * @param pcb tcp_pcb + * @param opts option pointer where to store the SACK option + * @param num_sacks the number of SACKs to store + */ +static void +tcp_build_sack_option(const struct tcp_pcb *pcb, u32_t *opts, u8_t num_sacks) +{ + u8_t i; + + LWIP_ASSERT("tcp_build_sack_option: invalid pcb", pcb != NULL); + LWIP_ASSERT("tcp_build_sack_option: invalid opts", opts != NULL); + + /* Pad with two NOP options to make everything nicely aligned. + We add the length (of just the SACK option, not the NOPs in front of it), + which is 2B of header, plus 8B for each SACK. */ + *(opts++) = PP_HTONL(0x01010500 + 2 + num_sacks * 8); + + for (i = 0; i < num_sacks; ++i) { + *(opts++) = lwip_htonl(pcb->rcv_sacks[i].left); + *(opts++) = lwip_htonl(pcb->rcv_sacks[i].right); + } +} + +#endif + +#if LWIP_WND_SCALE +/** Build a window scale option (3 bytes long) at the specified options pointer) + * + * @param opts option pointer where to store the window scale option + */ +static void +tcp_build_wnd_scale_option(u32_t *opts) +{ + LWIP_ASSERT("tcp_build_wnd_scale_option: invalid opts", opts != NULL); + + /* Pad with one NOP option to make everything nicely aligned */ + opts[0] = PP_HTONL(0x01030300 | TCP_RCV_SCALE); +} +#endif + +/** + * @ingroup tcp_raw + * Find out what we can send and send it + * + * @param pcb Protocol control block for the TCP connection to send data + * @return ERR_OK if data has been sent or nothing to send + * another err_t on error + */ +err_t +tcp_output(struct tcp_pcb *pcb) +{ + struct tcp_seg *seg, *useg; + u32_t wnd, snd_nxt; + err_t err; + struct netif *netif; +#if TCP_CWND_DEBUG + s16_t i = 0; +#endif /* TCP_CWND_DEBUG */ + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ASSERT("tcp_output: invalid pcb", pcb != NULL); + /* pcb->state LISTEN not allowed here */ + LWIP_ASSERT("don't call tcp_output for listen-pcbs", + pcb->state != LISTEN); + + /* First, check if we are invoked by the TCP input processing + code. If so, we do not output anything. Instead, we rely on the + input processing code to call us when input processing is done + with. */ + if (tcp_input_pcb == pcb) { + return ERR_OK; + } + + wnd = LWIP_MIN(pcb->snd_wnd, pcb->cwnd); + + seg = pcb->unsent; + + if (seg == NULL) { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: nothing to send (%p)\n", + (void *)pcb->unsent)); + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %"TCPWNDSIZE_F + ", cwnd %"TCPWNDSIZE_F", wnd %"U32_F + ", seg == NULL, ack %"U32_F"\n", + pcb->snd_wnd, pcb->cwnd, wnd, pcb->lastack)); + + /* If the TF_ACK_NOW flag is set and the ->unsent queue is empty, construct + * an empty ACK segment and send it. */ + if (pcb->flags & TF_ACK_NOW) { + return tcp_send_empty_ack(pcb); + } + /* nothing to send: shortcut out of here */ + goto output_done; + } else { + LWIP_DEBUGF(TCP_CWND_DEBUG, + ("tcp_output: snd_wnd %"TCPWNDSIZE_F", cwnd %"TCPWNDSIZE_F", wnd %"U32_F + ", effwnd %"U32_F", seq %"U32_F", ack %"U32_F"\n", + pcb->snd_wnd, pcb->cwnd, wnd, + lwip_ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len, + lwip_ntohl(seg->tcphdr->seqno), pcb->lastack)); + } + + netif = tcp_route(pcb, &pcb->local_ip, &pcb->remote_ip); + if (netif == NULL) { + return ERR_RTE; + } + + /* If we don't have a local IP address, we get one from netif */ + if (ip_addr_isany(&pcb->local_ip)) { + const ip_addr_t *local_ip = ip_netif_get_local_ip(netif, &pcb->remote_ip); + if (local_ip == NULL) { + return ERR_RTE; + } + ip_addr_copy(pcb->local_ip, *local_ip); + } + + /* Handle the current segment not fitting within the window */ + if (lwip_ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len > wnd) { + /* We need to start the persistent timer when the next unsent segment does not fit + * within the remaining (could be 0) send window and RTO timer is not running (we + * have no in-flight data). If window is still too small after persist timer fires, + * then we split the segment. We don't consider the congestion window since a cwnd + * smaller than 1 SMSS implies in-flight data + */ + if (wnd == pcb->snd_wnd && pcb->unacked == NULL && pcb->persist_backoff == 0) { + pcb->persist_cnt = 0; + pcb->persist_backoff = 1; + pcb->persist_probe = 0; + } + /* We need an ACK, but can't send data now, so send an empty ACK */ + if (pcb->flags & TF_ACK_NOW) { + return tcp_send_empty_ack(pcb); + } + goto output_done; + } + /* Stop persist timer, above conditions are not active */ + pcb->persist_backoff = 0; + + /* useg should point to last segment on unacked queue */ + useg = pcb->unacked; + if (useg != NULL) { + for (; useg->next != NULL; useg = useg->next); + } + /* data available and window allows it to be sent? */ + while (seg != NULL && + lwip_ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len <= wnd) { + LWIP_ASSERT("RST not expected here!", + (TCPH_FLAGS(seg->tcphdr) & TCP_RST) == 0); + /* Stop sending if the nagle algorithm would prevent it + * Don't stop: + * - if tcp_write had a memory error before (prevent delayed ACK timeout) or + * - if FIN was already enqueued for this PCB (SYN is always alone in a segment - + * either seg->next != NULL or pcb->unacked == NULL; + * RST is no sent using tcp_write/tcp_output. + */ + if ((tcp_do_output_nagle(pcb) == 0) && + ((pcb->flags & (TF_NAGLEMEMERR | TF_FIN)) == 0)) { + break; + } +#if TCP_CWND_DEBUG + LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %"TCPWNDSIZE_F", cwnd %"TCPWNDSIZE_F", wnd %"U32_F", effwnd %"U32_F", seq %"U32_F", ack %"U32_F", i %"S16_F"\n", + pcb->snd_wnd, pcb->cwnd, wnd, + lwip_ntohl(seg->tcphdr->seqno) + seg->len - + pcb->lastack, + lwip_ntohl(seg->tcphdr->seqno), pcb->lastack, i)); + ++i; +#endif /* TCP_CWND_DEBUG */ + + if (pcb->state != SYN_SENT) { + TCPH_SET_FLAG(seg->tcphdr, TCP_ACK); + } + + err = tcp_output_segment(seg, pcb, netif); + if (err != ERR_OK) { + /* segment could not be sent, for whatever reason */ + tcp_set_flags(pcb, TF_NAGLEMEMERR); + return err; + } +#if TCP_OVERSIZE_DBGCHECK + seg->oversize_left = 0; +#endif /* TCP_OVERSIZE_DBGCHECK */ + pcb->unsent = seg->next; + if (pcb->state != SYN_SENT) { + tcp_clear_flags(pcb, TF_ACK_DELAY | TF_ACK_NOW); + } + snd_nxt = lwip_ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg); + if (TCP_SEQ_LT(pcb->snd_nxt, snd_nxt)) { + pcb->snd_nxt = snd_nxt; + } + /* put segment on unacknowledged list if length > 0 */ + if (TCP_TCPLEN(seg) > 0) { + seg->next = NULL; + /* unacked list is empty? */ + if (pcb->unacked == NULL) { + pcb->unacked = seg; + useg = seg; + /* unacked list is not empty? */ + } else { + /* In the case of fast retransmit, the packet should not go to the tail + * of the unacked queue, but rather somewhere before it. We need to check for + * this case. -STJ Jul 27, 2004 */ + if (TCP_SEQ_LT(lwip_ntohl(seg->tcphdr->seqno), lwip_ntohl(useg->tcphdr->seqno))) { + /* add segment to before tail of unacked list, keeping the list sorted */ + struct tcp_seg **cur_seg = &(pcb->unacked); + while (*cur_seg && + TCP_SEQ_LT(lwip_ntohl((*cur_seg)->tcphdr->seqno), lwip_ntohl(seg->tcphdr->seqno))) { + cur_seg = &((*cur_seg)->next ); + } + seg->next = (*cur_seg); + (*cur_seg) = seg; + } else { + /* add segment to tail of unacked list */ + useg->next = seg; + useg = useg->next; + } + } + /* do not queue empty segments on the unacked list */ + } else { + tcp_seg_free(seg); + } + seg = pcb->unsent; + } +#if TCP_OVERSIZE + if (pcb->unsent == NULL) { + /* last unsent has been removed, reset unsent_oversize */ + pcb->unsent_oversize = 0; + } +#endif /* TCP_OVERSIZE */ + +output_done: + tcp_clear_flags(pcb, TF_NAGLEMEMERR); + return ERR_OK; +} + +/** Check if a segment's pbufs are used by someone else than TCP. + * This can happen on retransmission if the pbuf of this segment is still + * referenced by the netif driver due to deferred transmission. + * This is the case (only!) if someone down the TX call path called + * pbuf_ref() on one of the pbufs! + * + * @arg seg the tcp segment to check + * @return 1 if ref != 1, 0 if ref == 1 + */ +static int +tcp_output_segment_busy(const struct tcp_seg *seg) +{ + LWIP_ASSERT("tcp_output_segment_busy: invalid seg", seg != NULL); + + /* We only need to check the first pbuf here: + If a pbuf is queued for transmission, a driver calls pbuf_ref(), + which only changes the ref count of the first pbuf */ + if (seg->p->ref != 1) { + /* other reference found */ + return 1; + } + /* no other references found */ + return 0; +} + +/** + * Called by tcp_output() to actually send a TCP segment over IP. + * + * @param seg the tcp_seg to send + * @param pcb the tcp_pcb for the TCP connection used to send the segment + * @param netif the netif used to send the segment + */ +static err_t +tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb, struct netif *netif) +{ + err_t err; + u16_t len; + u32_t *opts; +#if TCP_CHECKSUM_ON_COPY + int seg_chksum_was_swapped = 0; +#endif + + LWIP_ASSERT("tcp_output_segment: invalid seg", seg != NULL); + LWIP_ASSERT("tcp_output_segment: invalid pcb", pcb != NULL); + LWIP_ASSERT("tcp_output_segment: invalid netif", netif != NULL); + + if (tcp_output_segment_busy(seg)) { + /* This should not happen: rexmit functions should have checked this. + However, since this function modifies p->len, we must not continue in this case. */ + LWIP_DEBUGF(TCP_RTO_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_output_segment: segment busy\n")); + return ERR_OK; + } + + /* The TCP header has already been constructed, but the ackno and + wnd fields remain. */ + seg->tcphdr->ackno = lwip_htonl(pcb->rcv_nxt); + + /* advertise our receive window size in this TCP segment */ +#if LWIP_WND_SCALE + if (seg->flags & TF_SEG_OPTS_WND_SCALE) { + /* The Window field in a SYN segment itself (the only type where we send + the window scale option) is never scaled. */ + seg->tcphdr->wnd = lwip_htons(TCPWND_MIN16(pcb->rcv_ann_wnd)); + } else +#endif /* LWIP_WND_SCALE */ + { + seg->tcphdr->wnd = lwip_htons(TCPWND_MIN16(RCV_WND_SCALE(pcb, pcb->rcv_ann_wnd))); + } + + pcb->rcv_ann_right_edge = pcb->rcv_nxt + pcb->rcv_ann_wnd; + + /* Add any requested options. NB MSS option is only set on SYN + packets, so ignore it here */ + /* cast through void* to get rid of alignment warnings */ + opts = (u32_t *)(void *)(seg->tcphdr + 1); + if (seg->flags & TF_SEG_OPTS_MSS) { + u16_t mss; +#if TCP_CALCULATE_EFF_SEND_MSS + mss = tcp_eff_send_mss_netif(TCP_MSS, netif, &pcb->remote_ip); +#else /* TCP_CALCULATE_EFF_SEND_MSS */ + mss = TCP_MSS; +#endif /* TCP_CALCULATE_EFF_SEND_MSS */ + *opts = TCP_BUILD_MSS_OPTION(mss); + opts += 1; + } +#if LWIP_TCP_TIMESTAMPS + pcb->ts_lastacksent = pcb->rcv_nxt; + + if (seg->flags & TF_SEG_OPTS_TS) { + tcp_build_timestamp_option(pcb, opts); + opts += 3; + } +#endif +#if LWIP_WND_SCALE + if (seg->flags & TF_SEG_OPTS_WND_SCALE) { + tcp_build_wnd_scale_option(opts); + opts += 1; + } +#endif +#if LWIP_TCP_SACK_OUT + if (seg->flags & TF_SEG_OPTS_SACK_PERM) { + /* Pad with two NOP options to make everything nicely aligned + * NOTE: When we send both timestamp and SACK_PERM options, + * we could use the first two NOPs before the timestamp to store SACK_PERM option, + * but that would complicate the code. + */ + *(opts++) = PP_HTONL(0x01010402); + } +#endif + + /* Set retransmission timer running if it is not currently enabled + This must be set before checking the route. */ + if (pcb->rtime < 0) { + pcb->rtime = 0; + } + + if (pcb->rttest == 0) { + pcb->rttest = tcp_ticks; + pcb->rtseq = lwip_ntohl(seg->tcphdr->seqno); + + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_output_segment: rtseq %"U32_F"\n", pcb->rtseq)); + } + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output_segment: %"U32_F":%"U32_F"\n", + lwip_htonl(seg->tcphdr->seqno), lwip_htonl(seg->tcphdr->seqno) + + seg->len)); + + len = (u16_t)((u8_t *)seg->tcphdr - (u8_t *)seg->p->payload); + if (len == 0) { + /** Exclude retransmitted segments from this count. */ + MIB2_STATS_INC(mib2.tcpoutsegs); + } + + seg->p->len -= len; + seg->p->tot_len -= len; + + seg->p->payload = seg->tcphdr; + + seg->tcphdr->chksum = 0; + +#ifdef LWIP_HOOK_TCP_OUT_ADD_TCPOPTS + opts = LWIP_HOOK_TCP_OUT_ADD_TCPOPTS(seg->p, seg->tcphdr, pcb, opts); +#endif + LWIP_ASSERT("options not filled", (u8_t *)opts == ((u8_t *)(seg->tcphdr + 1)) + LWIP_TCP_OPT_LENGTH_SEGMENT(seg->flags, pcb)); + +#if CHECKSUM_GEN_TCP + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_TCP) { +#if TCP_CHECKSUM_ON_COPY + u32_t acc; +#if TCP_CHECKSUM_ON_COPY_SANITY_CHECK + u16_t chksum_slow = ip_chksum_pseudo(seg->p, IP_PROTO_TCP, + seg->p->tot_len, &pcb->local_ip, &pcb->remote_ip); +#endif /* TCP_CHECKSUM_ON_COPY_SANITY_CHECK */ + if ((seg->flags & TF_SEG_DATA_CHECKSUMMED) == 0) { + LWIP_ASSERT("data included but not checksummed", + seg->p->tot_len == TCPH_HDRLEN_BYTES(seg->tcphdr)); + } + + /* rebuild TCP header checksum (TCP header changes for retransmissions!) */ + acc = ip_chksum_pseudo_partial(seg->p, IP_PROTO_TCP, + seg->p->tot_len, TCPH_HDRLEN_BYTES(seg->tcphdr), &pcb->local_ip, &pcb->remote_ip); + /* add payload checksum */ + if (seg->chksum_swapped) { + seg_chksum_was_swapped = 1; + seg->chksum = SWAP_BYTES_IN_WORD(seg->chksum); + seg->chksum_swapped = 0; + } + acc = (u16_t)~acc + seg->chksum; + seg->tcphdr->chksum = (u16_t)~FOLD_U32T(acc); +#if TCP_CHECKSUM_ON_COPY_SANITY_CHECK + if (chksum_slow != seg->tcphdr->chksum) { + TCP_CHECKSUM_ON_COPY_SANITY_CHECK_FAIL( + ("tcp_output_segment: calculated checksum is %"X16_F" instead of %"X16_F"\n", + seg->tcphdr->chksum, chksum_slow)); + seg->tcphdr->chksum = chksum_slow; + } +#endif /* TCP_CHECKSUM_ON_COPY_SANITY_CHECK */ +#else /* TCP_CHECKSUM_ON_COPY */ + seg->tcphdr->chksum = ip_chksum_pseudo(seg->p, IP_PROTO_TCP, + seg->p->tot_len, &pcb->local_ip, &pcb->remote_ip); +#endif /* TCP_CHECKSUM_ON_COPY */ + } +#endif /* CHECKSUM_GEN_TCP */ + TCP_STATS_INC(tcp.xmit); + + NETIF_SET_HINTS(netif, &(pcb->netif_hints)); + err = ip_output_if(seg->p, &pcb->local_ip, &pcb->remote_ip, pcb->ttl, + pcb->tos, IP_PROTO_TCP, netif); + NETIF_RESET_HINTS(netif); + +#if TCP_CHECKSUM_ON_COPY + if (seg_chksum_was_swapped) { + /* if data is added to this segment later, chksum needs to be swapped, + so restore this now */ + seg->chksum = SWAP_BYTES_IN_WORD(seg->chksum); + seg->chksum_swapped = 1; + } +#endif + + return err; +} + +/** + * Requeue all unacked segments for retransmission + * + * Called by tcp_slowtmr() for slow retransmission. + * + * @param pcb the tcp_pcb for which to re-enqueue all unacked segments + */ +err_t +tcp_rexmit_rto_prepare(struct tcp_pcb *pcb) +{ + struct tcp_seg *seg; + + LWIP_ASSERT("tcp_rexmit_rto_prepare: invalid pcb", pcb != NULL); + + if (pcb->unacked == NULL) { + return ERR_VAL; + } + + /* Move all unacked segments to the head of the unsent queue. + However, give up if any of the unsent pbufs are still referenced by the + netif driver due to deferred transmission. No point loading the link further + if it is struggling to flush its buffered writes. */ + for (seg = pcb->unacked; seg->next != NULL; seg = seg->next) { + if (tcp_output_segment_busy(seg)) { + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_rexmit_rto: segment busy\n")); + return ERR_VAL; + } + } + if (tcp_output_segment_busy(seg)) { + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_rexmit_rto: segment busy\n")); + return ERR_VAL; + } + /* concatenate unsent queue after unacked queue */ + seg->next = pcb->unsent; +#if TCP_OVERSIZE_DBGCHECK + /* if last unsent changed, we need to update unsent_oversize */ + if (pcb->unsent == NULL) { + pcb->unsent_oversize = seg->oversize_left; + } +#endif /* TCP_OVERSIZE_DBGCHECK */ + /* unsent queue is the concatenated queue (of unacked, unsent) */ + pcb->unsent = pcb->unacked; + /* unacked queue is now empty */ + pcb->unacked = NULL; + + /* Mark RTO in-progress */ + tcp_set_flags(pcb, TF_RTO); + /* Record the next byte following retransmit */ + pcb->rto_end = lwip_ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg); + /* Don't take any RTT measurements after retransmitting. */ + pcb->rttest = 0; + + return ERR_OK; +} + +/** + * Requeue all unacked segments for retransmission + * + * Called by tcp_slowtmr() for slow retransmission. + * + * @param pcb the tcp_pcb for which to re-enqueue all unacked segments + */ +void +tcp_rexmit_rto_commit(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("tcp_rexmit_rto_commit: invalid pcb", pcb != NULL); + + /* increment number of retransmissions */ + if (pcb->nrtx < 0xFF) { + ++pcb->nrtx; + } + /* Do the actual retransmission */ + tcp_output(pcb); +} + +/** + * Requeue all unacked segments for retransmission + * + * Called by tcp_process() only, tcp_slowtmr() needs to do some things between + * "prepare" and "commit". + * + * @param pcb the tcp_pcb for which to re-enqueue all unacked segments + */ +void +tcp_rexmit_rto(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("tcp_rexmit_rto: invalid pcb", pcb != NULL); + + if (tcp_rexmit_rto_prepare(pcb) == ERR_OK) { + tcp_rexmit_rto_commit(pcb); + } +} + +/** + * Requeue the first unacked segment for retransmission + * + * Called by tcp_receive() for fast retransmit. + * + * @param pcb the tcp_pcb for which to retransmit the first unacked segment + */ +err_t +tcp_rexmit(struct tcp_pcb *pcb) +{ + struct tcp_seg *seg; + struct tcp_seg **cur_seg; + + LWIP_ASSERT("tcp_rexmit: invalid pcb", pcb != NULL); + + if (pcb->unacked == NULL) { + return ERR_VAL; + } + + seg = pcb->unacked; + + /* Give up if the segment is still referenced by the netif driver + due to deferred transmission. */ + if (tcp_output_segment_busy(seg)) { + LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_rexmit busy\n")); + return ERR_VAL; + } + + /* Move the first unacked segment to the unsent queue */ + /* Keep the unsent queue sorted. */ + pcb->unacked = seg->next; + + cur_seg = &(pcb->unsent); + while (*cur_seg && + TCP_SEQ_LT(lwip_ntohl((*cur_seg)->tcphdr->seqno), lwip_ntohl(seg->tcphdr->seqno))) { + cur_seg = &((*cur_seg)->next ); + } + seg->next = *cur_seg; + *cur_seg = seg; +#if TCP_OVERSIZE + if (seg->next == NULL) { + /* the retransmitted segment is last in unsent, so reset unsent_oversize */ + pcb->unsent_oversize = 0; + } +#endif /* TCP_OVERSIZE */ + + if (pcb->nrtx < 0xFF) { + ++pcb->nrtx; + } + + /* Don't take any rtt measurements after retransmitting. */ + pcb->rttest = 0; + + /* Do the actual retransmission. */ + MIB2_STATS_INC(mib2.tcpretranssegs); + /* No need to call tcp_output: we are always called from tcp_input() + and thus tcp_output directly returns. */ + return ERR_OK; +} + + +/** + * Handle retransmission after three dupacks received + * + * @param pcb the tcp_pcb for which to retransmit the first unacked segment + */ +void +tcp_rexmit_fast(struct tcp_pcb *pcb) +{ + LWIP_ASSERT("tcp_rexmit_fast: invalid pcb", pcb != NULL); + + if (pcb->unacked != NULL && !(pcb->flags & TF_INFR)) { + /* This is fast retransmit. Retransmit the first unacked segment. */ + LWIP_DEBUGF(TCP_FR_DEBUG, + ("tcp_receive: dupacks %"U16_F" (%"U32_F + "), fast retransmit %"U32_F"\n", + (u16_t)pcb->dupacks, pcb->lastack, + lwip_ntohl(pcb->unacked->tcphdr->seqno))); + if (tcp_rexmit(pcb) == ERR_OK) { + /* Set ssthresh to half of the minimum of the current + * cwnd and the advertised window */ + pcb->ssthresh = LWIP_MIN(pcb->cwnd, pcb->snd_wnd) / 2; + + /* The minimum value for ssthresh should be 2 MSS */ + if (pcb->ssthresh < (2U * pcb->mss)) { + LWIP_DEBUGF(TCP_FR_DEBUG, + ("tcp_receive: The minimum value for ssthresh %"TCPWNDSIZE_F + " should be min 2 mss %"U16_F"...\n", + pcb->ssthresh, (u16_t)(2 * pcb->mss))); + pcb->ssthresh = 2 * pcb->mss; + } + + pcb->cwnd = pcb->ssthresh + 3 * pcb->mss; + tcp_set_flags(pcb, TF_INFR); + + /* Reset the retransmission timer to prevent immediate rto retransmissions */ + pcb->rtime = 0; + } + } +} + +static struct pbuf * +tcp_output_alloc_header_common(u32_t ackno, u16_t optlen, u16_t datalen, + u32_t seqno_be /* already in network byte order */, + u16_t src_port, u16_t dst_port, u8_t flags, u16_t wnd) +{ + struct tcp_hdr *tcphdr; + struct pbuf *p; + + p = pbuf_alloc(PBUF_IP, TCP_HLEN + optlen + datalen, PBUF_RAM); + if (p != NULL) { + LWIP_ASSERT("check that first pbuf can hold struct tcp_hdr", + (p->len >= TCP_HLEN + optlen)); + tcphdr = (struct tcp_hdr *)p->payload; + tcphdr->src = lwip_htons(src_port); + tcphdr->dest = lwip_htons(dst_port); + tcphdr->seqno = seqno_be; + tcphdr->ackno = lwip_htonl(ackno); + TCPH_HDRLEN_FLAGS_SET(tcphdr, (5 + optlen / 4), flags); + tcphdr->wnd = lwip_htons(wnd); + tcphdr->chksum = 0; + tcphdr->urgp = 0; + } + return p; +} + +/** Allocate a pbuf and create a tcphdr at p->payload, used for output + * functions other than the default tcp_output -> tcp_output_segment + * (e.g. tcp_send_empty_ack, etc.) + * + * @param pcb tcp pcb for which to send a packet (used to initialize tcp_hdr) + * @param optlen length of header-options + * @param datalen length of tcp data to reserve in pbuf + * @param seqno_be seqno in network byte order (big-endian) + * @return pbuf with p->payload being the tcp_hdr + */ +static struct pbuf * +tcp_output_alloc_header(struct tcp_pcb *pcb, u16_t optlen, u16_t datalen, + u32_t seqno_be /* already in network byte order */) +{ + struct pbuf *p; + + LWIP_ASSERT("tcp_output_alloc_header: invalid pcb", pcb != NULL); + + p = tcp_output_alloc_header_common(pcb->rcv_nxt, optlen, datalen, + seqno_be, pcb->local_port, pcb->remote_port, TCP_ACK, + TCPWND_MIN16(RCV_WND_SCALE(pcb, pcb->rcv_ann_wnd))); + if (p != NULL) { + /* If we're sending a packet, update the announced right window edge */ + pcb->rcv_ann_right_edge = pcb->rcv_nxt + pcb->rcv_ann_wnd; + } + return p; +} + +/* Fill in options for control segments */ +static void +tcp_output_fill_options(const struct tcp_pcb *pcb, struct pbuf *p, u8_t optflags, u8_t num_sacks) +{ + struct tcp_hdr *tcphdr; + u32_t *opts; + u16_t sacks_len = 0; + + LWIP_ASSERT("tcp_output_fill_options: invalid pbuf", p != NULL); + + tcphdr = (struct tcp_hdr *)p->payload; + opts = (u32_t *)(void *)(tcphdr + 1); + + /* NB. MSS and window scale options are only sent on SYNs, so ignore them here */ + +#if LWIP_TCP_TIMESTAMPS + if (optflags & TF_SEG_OPTS_TS) { + tcp_build_timestamp_option(pcb, opts); + opts += 3; + } +#endif + +#if LWIP_TCP_SACK_OUT + if (pcb && (num_sacks > 0)) { + tcp_build_sack_option(pcb, opts, num_sacks); + /* 1 word for SACKs header (including 2xNOP), and 2 words for each SACK */ + sacks_len = 1 + num_sacks * 2; + opts += sacks_len; + } +#else + LWIP_UNUSED_ARG(num_sacks); +#endif + +#ifdef LWIP_HOOK_TCP_OUT_ADD_TCPOPTS + opts = LWIP_HOOK_TCP_OUT_ADD_TCPOPTS(p, tcphdr, pcb, opts); +#endif + + LWIP_UNUSED_ARG(pcb); + LWIP_UNUSED_ARG(sacks_len); + LWIP_ASSERT("options not filled", (u8_t *)opts == ((u8_t *)(tcphdr + 1)) + sacks_len * 4 + LWIP_TCP_OPT_LENGTH_SEGMENT(optflags, pcb)); + LWIP_UNUSED_ARG(optflags); /* for LWIP_NOASSERT */ + LWIP_UNUSED_ARG(opts); /* for LWIP_NOASSERT */ +} + +/** Output a control segment pbuf to IP. + * + * Called from tcp_rst, tcp_send_empty_ack, tcp_keepalive and tcp_zero_window_probe, + * this function combines selecting a netif for transmission, generating the tcp + * header checksum and calling ip_output_if while handling netif hints and stats. + */ +static err_t +tcp_output_control_segment(const struct tcp_pcb *pcb, struct pbuf *p, + const ip_addr_t *src, const ip_addr_t *dst) +{ + struct netif *netif; + + LWIP_ASSERT("tcp_output_control_segment: invalid pbuf", p != NULL); + + netif = tcp_route(pcb, src, dst); + if (netif == NULL) { + pbuf_free(p); + return ERR_RTE; + } + return tcp_output_control_segment_netif(pcb, p, src, dst, netif); +} + +/** Output a control segment pbuf to IP. + * + * Called instead of tcp_output_control_segment when we don't have a pcb but we + * do know the interface to send to. + */ +static err_t +tcp_output_control_segment_netif(const struct tcp_pcb *pcb, struct pbuf *p, + const ip_addr_t *src, const ip_addr_t *dst, + struct netif *netif) +{ + err_t err; + u8_t ttl, tos; + + LWIP_ASSERT("tcp_output_control_segment_netif: no netif given", netif != NULL); + +#if CHECKSUM_GEN_TCP + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_TCP) { + struct tcp_hdr *tcphdr = (struct tcp_hdr *)p->payload; + tcphdr->chksum = ip_chksum_pseudo(p, IP_PROTO_TCP, p->tot_len, + src, dst); + } +#endif + if (pcb != NULL) { + NETIF_SET_HINTS(netif, LWIP_CONST_CAST(struct netif_hint*, &(pcb->netif_hints))); + ttl = pcb->ttl; + tos = pcb->tos; + } else { + /* Send output with hardcoded TTL/HL since we have no access to the pcb */ + ttl = TCP_TTL; + tos = 0; + } + TCP_STATS_INC(tcp.xmit); + err = ip_output_if(p, src, dst, ttl, tos, IP_PROTO_TCP, netif); + NETIF_RESET_HINTS(netif); + + pbuf_free(p); + return err; +} + +static struct pbuf * +tcp_rst_common(const struct tcp_pcb *pcb, u32_t seqno, u32_t ackno, + const ip_addr_t *local_ip, const ip_addr_t *remote_ip, + u16_t local_port, u16_t remote_port) +{ + struct pbuf *p; + u16_t wnd; + u8_t optlen; + + LWIP_ASSERT("tcp_rst: invalid local_ip", local_ip != NULL); + LWIP_ASSERT("tcp_rst: invalid remote_ip", remote_ip != NULL); + + optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(0, pcb); + +#if LWIP_WND_SCALE + wnd = PP_HTONS(((TCP_WND >> TCP_RCV_SCALE) & 0xFFFF)); +#else + wnd = PP_HTONS(TCP_WND); +#endif + + p = tcp_output_alloc_header_common(ackno, optlen, 0, lwip_htonl(seqno), local_port, + remote_port, TCP_RST | TCP_ACK, wnd); + if (p == NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_rst: could not allocate memory for pbuf\n")); + return NULL; + } + tcp_output_fill_options(pcb, p, 0, 0); + + MIB2_STATS_INC(mib2.tcpoutrsts); + + LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_rst: seqno %"U32_F" ackno %"U32_F".\n", seqno, ackno)); + return p; +} + +/** + * Send a TCP RESET packet (empty segment with RST flag set) to abort a + * connection. + * + * Called by tcp_abort() (to abort a local connection), tcp_closen() (if not + * all data has been received by the application), tcp_timewait_input() (if a + * SYN is received) and tcp_process() (received segment in the wrong state). + * + * Since a RST segment is in most cases not sent for an active connection, + * tcp_rst() has a number of arguments that are taken from a tcp_pcb for + * most other segment output functions. + * + * @param pcb TCP pcb (may be NULL if no pcb is available) + * @param seqno the sequence number to use for the outgoing segment + * @param ackno the acknowledge number to use for the outgoing segment + * @param local_ip the local IP address to send the segment from + * @param remote_ip the remote IP address to send the segment to + * @param local_port the local TCP port to send the segment from + * @param remote_port the remote TCP port to send the segment to + */ +void +tcp_rst(const struct tcp_pcb *pcb, u32_t seqno, u32_t ackno, + const ip_addr_t *local_ip, const ip_addr_t *remote_ip, + u16_t local_port, u16_t remote_port) +{ + struct pbuf *p; + + p = tcp_rst_common(pcb, seqno, ackno, local_ip, remote_ip, local_port, remote_port); + if (p != NULL) { + tcp_output_control_segment(pcb, p, local_ip, remote_ip); + } +} + +/** + * Send a TCP RESET packet (empty segment with RST flag set) to show that there + * is no matching local connection for a received segment. + * + * Called by tcp_input() (if no matching local pcb was found) and + * tcp_listen_input() (if incoming segment has ACK flag set). + * + * Since a RST segment is in most cases not sent for an active connection, + * tcp_rst() has a number of arguments that are taken from a tcp_pcb for + * most other segment output functions. + * + * @param netif the netif on which to send the RST (since we have no pcb) + * @param seqno the sequence number to use for the outgoing segment + * @param ackno the acknowledge number to use for the outgoing segment + * @param local_ip the local IP address to send the segment from + * @param remote_ip the remote IP address to send the segment to + * @param local_port the local TCP port to send the segment from + * @param remote_port the remote TCP port to send the segment to + */ +void +tcp_rst_netif(struct netif *netif, u32_t seqno, u32_t ackno, + const ip_addr_t *local_ip, const ip_addr_t *remote_ip, + u16_t local_port, u16_t remote_port) +{ + if (netif) { + struct pbuf *p = tcp_rst_common(NULL, seqno, ackno, local_ip, remote_ip, local_port, remote_port); + if (p != NULL) { + tcp_output_control_segment_netif(NULL, p, local_ip, remote_ip, netif); + } + } else { + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_rst_netif: no netif given\n")); + } +} + +/** + * Send an ACK without data. + * + * @param pcb Protocol control block for the TCP connection to send the ACK + */ +err_t +tcp_send_empty_ack(struct tcp_pcb *pcb) +{ + err_t err; + struct pbuf *p; + u8_t optlen, optflags = 0; + u8_t num_sacks = 0; + + LWIP_ASSERT("tcp_send_empty_ack: invalid pcb", pcb != NULL); + +#if LWIP_TCP_TIMESTAMPS + if (pcb->flags & TF_TIMESTAMP) { + optflags = TF_SEG_OPTS_TS; + } +#endif + optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(optflags, pcb); + +#if LWIP_TCP_SACK_OUT + /* For now, SACKs are only sent with empty ACKs */ + if ((num_sacks = tcp_get_num_sacks(pcb, optlen)) > 0) { + optlen += 4 + num_sacks * 8; /* 4 bytes for header (including 2*NOP), plus 8B for each SACK */ + } +#endif + + p = tcp_output_alloc_header(pcb, optlen, 0, lwip_htonl(pcb->snd_nxt)); + if (p == NULL) { + /* let tcp_fasttmr retry sending this ACK */ + tcp_set_flags(pcb, TF_ACK_DELAY | TF_ACK_NOW); + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: (ACK) could not allocate pbuf\n")); + return ERR_BUF; + } + tcp_output_fill_options(pcb, p, optflags, num_sacks); + +#if LWIP_TCP_TIMESTAMPS + pcb->ts_lastacksent = pcb->rcv_nxt; +#endif + + LWIP_DEBUGF(TCP_OUTPUT_DEBUG, + ("tcp_output: sending ACK for %"U32_F"\n", pcb->rcv_nxt)); + err = tcp_output_control_segment(pcb, p, &pcb->local_ip, &pcb->remote_ip); + if (err != ERR_OK) { + /* let tcp_fasttmr retry sending this ACK */ + tcp_set_flags(pcb, TF_ACK_DELAY | TF_ACK_NOW); + } else { + /* remove ACK flags from the PCB, as we sent an empty ACK now */ + tcp_clear_flags(pcb, TF_ACK_DELAY | TF_ACK_NOW); + } + + return err; +} + +/** + * Send keepalive packets to keep a connection active although + * no data is sent over it. + * + * Called by tcp_slowtmr() + * + * @param pcb the tcp_pcb for which to send a keepalive packet + */ +err_t +tcp_keepalive(struct tcp_pcb *pcb) +{ + err_t err; + struct pbuf *p; + u8_t optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(0, pcb); + + LWIP_ASSERT("tcp_keepalive: invalid pcb", pcb != NULL); + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: sending KEEPALIVE probe to ")); + ip_addr_debug_print_val(TCP_DEBUG, pcb->remote_ip); + LWIP_DEBUGF(TCP_DEBUG, ("\n")); + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: tcp_ticks %"U32_F" pcb->tmr %"U32_F" pcb->keep_cnt_sent %"U16_F"\n", + tcp_ticks, pcb->tmr, (u16_t)pcb->keep_cnt_sent)); + + p = tcp_output_alloc_header(pcb, optlen, 0, lwip_htonl(pcb->snd_nxt - 1)); + if (p == NULL) { + LWIP_DEBUGF(TCP_DEBUG, + ("tcp_keepalive: could not allocate memory for pbuf\n")); + return ERR_MEM; + } + tcp_output_fill_options(pcb, p, 0, 0); + err = tcp_output_control_segment(pcb, p, &pcb->local_ip, &pcb->remote_ip); + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: seqno %"U32_F" ackno %"U32_F" err %d.\n", + pcb->snd_nxt - 1, pcb->rcv_nxt, (int)err)); + return err; +} + +/** + * Send persist timer zero-window probes to keep a connection active + * when a window update is lost. + * + * Called by tcp_slowtmr() + * + * @param pcb the tcp_pcb for which to send a zero-window probe packet + */ +err_t +tcp_zero_window_probe(struct tcp_pcb *pcb) +{ + err_t err; + struct pbuf *p; + struct tcp_hdr *tcphdr; + struct tcp_seg *seg; + u16_t len; + u8_t is_fin; + u32_t snd_nxt; + u8_t optlen = LWIP_TCP_OPT_LENGTH_SEGMENT(0, pcb); + + LWIP_ASSERT("tcp_zero_window_probe: invalid pcb", pcb != NULL); + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_zero_window_probe: sending ZERO WINDOW probe to ")); + ip_addr_debug_print_val(TCP_DEBUG, pcb->remote_ip); + LWIP_DEBUGF(TCP_DEBUG, ("\n")); + + LWIP_DEBUGF(TCP_DEBUG, + ("tcp_zero_window_probe: tcp_ticks %"U32_F + " pcb->tmr %"U32_F" pcb->keep_cnt_sent %"U16_F"\n", + tcp_ticks, pcb->tmr, (u16_t)pcb->keep_cnt_sent)); + + /* Only consider unsent, persist timer should be off when there is data in-flight */ + seg = pcb->unsent; + if (seg == NULL) { + /* Not expected, persist timer should be off when the send buffer is empty */ + return ERR_OK; + } + + /* increment probe count. NOTE: we record probe even if it fails + to actually transmit due to an error. This ensures memory exhaustion/ + routing problem doesn't leave a zero-window pcb as an indefinite zombie. + RTO mechanism has similar behavior, see pcb->nrtx */ + if (pcb->persist_probe < 0xFF) { + ++pcb->persist_probe; + } + + is_fin = ((TCPH_FLAGS(seg->tcphdr) & TCP_FIN) != 0) && (seg->len == 0); + /* we want to send one seqno: either FIN or data (no options) */ + len = is_fin ? 0 : 1; + + p = tcp_output_alloc_header(pcb, optlen, len, seg->tcphdr->seqno); + if (p == NULL) { + LWIP_DEBUGF(TCP_DEBUG, ("tcp_zero_window_probe: no memory for pbuf\n")); + return ERR_MEM; + } + tcphdr = (struct tcp_hdr *)p->payload; + + if (is_fin) { + /* FIN segment, no data */ + TCPH_FLAGS_SET(tcphdr, TCP_ACK | TCP_FIN); + } else { + /* Data segment, copy in one byte from the head of the unacked queue */ + char *d = ((char *)p->payload + TCP_HLEN); + /* Depending on whether the segment has already been sent (unacked) or not + (unsent), seg->p->payload points to the IP header or TCP header. + Ensure we copy the first TCP data byte: */ + pbuf_copy_partial(seg->p, d, 1, seg->p->tot_len - seg->len); + } + + /* The byte may be acknowledged without the window being opened. */ + snd_nxt = lwip_ntohl(seg->tcphdr->seqno) + 1; + if (TCP_SEQ_LT(pcb->snd_nxt, snd_nxt)) { + pcb->snd_nxt = snd_nxt; + } + tcp_output_fill_options(pcb, p, 0, 0); + + err = tcp_output_control_segment(pcb, p, &pcb->local_ip, &pcb->remote_ip); + + LWIP_DEBUGF(TCP_DEBUG, ("tcp_zero_window_probe: seqno %"U32_F + " ackno %"U32_F" err %d.\n", + pcb->snd_nxt - 1, pcb->rcv_nxt, (int)err)); + return err; +} +#endif /* LWIP_TCP */ diff --git a/lib/lwip/core/timeouts.c b/lib/lwip/core/timeouts.c new file mode 100644 index 0000000000..91657eb702 --- /dev/null +++ b/lib/lwip/core/timeouts.c @@ -0,0 +1,451 @@ +/** + * @file + * Stack-internal timers implementation. + * This file includes timer callbacks for stack-internal timers as well as + * functions to set up or stop timers and check for expired timers. + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * Simon Goldschmidt + * + */ + +#include "lwip/opt.h" + +#include "lwip/timeouts.h" +#include "lwip/priv/tcp_priv.h" + +#include "lwip/def.h" +#include "lwip/memp.h" +#include "lwip/priv/tcpip_priv.h" + +#include "lwip/ip4_frag.h" +#include "lwip/etharp.h" +#include "lwip/dhcp.h" +#include "lwip/acd.h" +#include "lwip/igmp.h" +#include "lwip/dns.h" +#include "lwip/nd6.h" +#include "lwip/ip6_frag.h" +#include "lwip/mld6.h" +#include "lwip/dhcp6.h" +#include "lwip/sys.h" +#include "lwip/pbuf.h" + +#if LWIP_DEBUG_TIMERNAMES +#define HANDLER(x) x, #x +#else /* LWIP_DEBUG_TIMERNAMES */ +#define HANDLER(x) x +#endif /* LWIP_DEBUG_TIMERNAMES */ + +#define LWIP_MAX_TIMEOUT 0x7fffffff + +/* Check if timer's expiry time is greater than time and care about u32_t wraparounds */ +#define TIME_LESS_THAN(t, compare_to) ( (((u32_t)((t)-(compare_to))) > LWIP_MAX_TIMEOUT) ? 1 : 0 ) + +/** This array contains all stack-internal cyclic timers. To get the number of + * timers, use LWIP_ARRAYSIZE() */ +const struct lwip_cyclic_timer lwip_cyclic_timers[] = { +#if LWIP_TCP + /* The TCP timer is a special case: it does not have to run always and + is triggered to start from TCP using tcp_timer_needed() */ + {TCP_TMR_INTERVAL, HANDLER(tcp_tmr)}, +#endif /* LWIP_TCP */ +#if LWIP_IPV4 +#if IP_REASSEMBLY + {IP_TMR_INTERVAL, HANDLER(ip_reass_tmr)}, +#endif /* IP_REASSEMBLY */ +#if LWIP_ARP + {ARP_TMR_INTERVAL, HANDLER(etharp_tmr)}, +#endif /* LWIP_ARP */ +#if LWIP_DHCP + {DHCP_COARSE_TIMER_MSECS, HANDLER(dhcp_coarse_tmr)}, + {DHCP_FINE_TIMER_MSECS, HANDLER(dhcp_fine_tmr)}, +#endif /* LWIP_DHCP */ +#if LWIP_ACD + {ACD_TMR_INTERVAL, HANDLER(acd_tmr)}, +#endif /* LWIP_ACD */ +#if LWIP_IGMP + {IGMP_TMR_INTERVAL, HANDLER(igmp_tmr)}, +#endif /* LWIP_IGMP */ +#endif /* LWIP_IPV4 */ +#if LWIP_DNS + {DNS_TMR_INTERVAL, HANDLER(dns_tmr)}, +#endif /* LWIP_DNS */ +#if LWIP_IPV6 + {ND6_TMR_INTERVAL, HANDLER(nd6_tmr)}, +#if LWIP_IPV6_REASS + {IP6_REASS_TMR_INTERVAL, HANDLER(ip6_reass_tmr)}, +#endif /* LWIP_IPV6_REASS */ +#if LWIP_IPV6_MLD + {MLD6_TMR_INTERVAL, HANDLER(mld6_tmr)}, +#endif /* LWIP_IPV6_MLD */ +#if LWIP_IPV6_DHCP6 + {DHCP6_TIMER_MSECS, HANDLER(dhcp6_tmr)}, +#endif /* LWIP_IPV6_DHCP6 */ +#endif /* LWIP_IPV6 */ +}; +const int lwip_num_cyclic_timers = LWIP_ARRAYSIZE(lwip_cyclic_timers); + +#if LWIP_TIMERS && !LWIP_TIMERS_CUSTOM + +/** The one and only timeout list */ +static struct sys_timeo *next_timeout; + +static u32_t current_timeout_due_time; + +#if LWIP_TESTMODE +struct sys_timeo** +sys_timeouts_get_next_timeout(void) +{ + return &next_timeout; +} +#endif + +#if LWIP_TCP +/** global variable that shows if the tcp timer is currently scheduled or not */ +static int tcpip_tcp_timer_active; + +/** + * Timer callback function that calls tcp_tmr() and reschedules itself. + * + * @param arg unused argument + */ +static void +tcpip_tcp_timer(void *arg) +{ + LWIP_UNUSED_ARG(arg); + + /* call TCP timer handler */ + tcp_tmr(); + /* timer still needed? */ + if (tcp_active_pcbs || tcp_tw_pcbs) { + /* restart timer */ + sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL); + } else { + /* disable timer */ + tcpip_tcp_timer_active = 0; + } +} + +/** + * Called from TCP_REG when registering a new PCB: + * the reason is to have the TCP timer only running when + * there are active (or time-wait) PCBs. + */ +void +tcp_timer_needed(void) +{ + LWIP_ASSERT_CORE_LOCKED(); + + /* timer is off but needed again? */ + if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) { + /* enable and start timer */ + tcpip_tcp_timer_active = 1; + sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL); + } +} +#endif /* LWIP_TCP */ + +static void +#if LWIP_DEBUG_TIMERNAMES +sys_timeout_abs(u32_t abs_time, sys_timeout_handler handler, void *arg, const char *handler_name) +#else /* LWIP_DEBUG_TIMERNAMES */ +sys_timeout_abs(u32_t abs_time, sys_timeout_handler handler, void *arg) +#endif +{ + struct sys_timeo *timeout, *t; + + timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT); + if (timeout == NULL) { + LWIP_ASSERT("sys_timeout: timeout != NULL, pool MEMP_SYS_TIMEOUT is empty", timeout != NULL); + return; + } + + timeout->next = NULL; + timeout->h = handler; + timeout->arg = arg; + timeout->time = abs_time; + +#if LWIP_DEBUG_TIMERNAMES + timeout->handler_name = handler_name; + LWIP_DEBUGF(TIMERS_DEBUG, ("sys_timeout: %p abs_time=%"U32_F" handler=%s arg=%p\n", + (void *)timeout, abs_time, handler_name, (void *)arg)); +#endif /* LWIP_DEBUG_TIMERNAMES */ + + if (next_timeout == NULL) { + next_timeout = timeout; + return; + } + if (TIME_LESS_THAN(timeout->time, next_timeout->time)) { + timeout->next = next_timeout; + next_timeout = timeout; + } else { + for (t = next_timeout; t != NULL; t = t->next) { + if ((t->next == NULL) || TIME_LESS_THAN(timeout->time, t->next->time)) { + timeout->next = t->next; + t->next = timeout; + break; + } + } + } +} + +/** + * Timer callback function that calls cyclic->handler() and reschedules itself. + * + * @param arg unused argument + */ +#if !LWIP_TESTMODE +static +#endif +void +lwip_cyclic_timer(void *arg) +{ + u32_t now; + u32_t next_timeout_time; + const struct lwip_cyclic_timer *cyclic = (const struct lwip_cyclic_timer *)arg; + +#if LWIP_DEBUG_TIMERNAMES + LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: %s()\n", cyclic->handler_name)); +#endif + cyclic->handler(); + + now = sys_now(); + next_timeout_time = (u32_t)(current_timeout_due_time + cyclic->interval_ms); /* overflow handled by TIME_LESS_THAN macro */ + if (TIME_LESS_THAN(next_timeout_time, now)) { + /* timer would immediately expire again -> "overload" -> restart without any correction */ +#if LWIP_DEBUG_TIMERNAMES + sys_timeout_abs((u32_t)(now + cyclic->interval_ms), lwip_cyclic_timer, arg, cyclic->handler_name); +#else + sys_timeout_abs((u32_t)(now + cyclic->interval_ms), lwip_cyclic_timer, arg); +#endif + + } else { + /* correct cyclic interval with handler execution delay and sys_check_timeouts jitter */ +#if LWIP_DEBUG_TIMERNAMES + sys_timeout_abs(next_timeout_time, lwip_cyclic_timer, arg, cyclic->handler_name); +#else + sys_timeout_abs(next_timeout_time, lwip_cyclic_timer, arg); +#endif + } +} + +/** Initialize this module */ +void sys_timeouts_init(void) +{ + size_t i; + /* tcp_tmr() at index 0 is started on demand */ + for (i = (LWIP_TCP ? 1 : 0); i < LWIP_ARRAYSIZE(lwip_cyclic_timers); i++) { + /* we have to cast via size_t to get rid of const warning + (this is OK as cyclic_timer() casts back to const* */ + sys_timeout(lwip_cyclic_timers[i].interval_ms, lwip_cyclic_timer, LWIP_CONST_CAST(void *, &lwip_cyclic_timers[i])); + } +} + +/** + * Create a one-shot timer (aka timeout). Timeouts are processed in the + * following cases: + * - while waiting for a message using sys_timeouts_mbox_fetch() + * - by calling sys_check_timeouts() (NO_SYS==1 only) + * + * @param msecs time in milliseconds after that the timer should expire + * @param handler callback function to call when msecs have elapsed + * @param arg argument to pass to the callback function + */ +#if LWIP_DEBUG_TIMERNAMES +void +sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char *handler_name) +#else /* LWIP_DEBUG_TIMERNAMES */ +void +sys_timeout(u32_t msecs, sys_timeout_handler handler, void *arg) +#endif /* LWIP_DEBUG_TIMERNAMES */ +{ + u32_t next_timeout_time; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ASSERT("Timeout time too long, max is LWIP_UINT32_MAX/4 msecs", msecs <= (LWIP_UINT32_MAX / 4)); + + next_timeout_time = (u32_t)(sys_now() + msecs); /* overflow handled by TIME_LESS_THAN macro */ + +#if LWIP_DEBUG_TIMERNAMES + sys_timeout_abs(next_timeout_time, handler, arg, handler_name); +#else + sys_timeout_abs(next_timeout_time, handler, arg); +#endif +} + +/** + * Go through timeout list (for this task only) and remove the first matching + * entry (subsequent entries remain untouched), even though the timeout has not + * triggered yet. + * + * @param handler callback function that would be called by the timeout + * @param arg callback argument that would be passed to handler +*/ +void +sys_untimeout(sys_timeout_handler handler, void *arg) +{ + struct sys_timeo *prev_t, *t; + + LWIP_ASSERT_CORE_LOCKED(); + + if (next_timeout == NULL) { + return; + } + + for (t = next_timeout, prev_t = NULL; t != NULL; prev_t = t, t = t->next) { + if ((t->h == handler) && (t->arg == arg)) { + /* We have a match */ + /* Unlink from previous in list */ + if (prev_t == NULL) { + next_timeout = t->next; + } else { + prev_t->next = t->next; + } + memp_free(MEMP_SYS_TIMEOUT, t); + return; + } + } + return; +} + +/** + * @ingroup lwip_nosys + * Handle timeouts for NO_SYS==1 (i.e. without using + * tcpip_thread/sys_timeouts_mbox_fetch(). Uses sys_now() to call timeout + * handler functions when timeouts expire. + * + * Must be called periodically from your main loop. + */ +void +sys_check_timeouts(void) +{ + u32_t now; + + LWIP_ASSERT_CORE_LOCKED(); + + /* Process only timers expired at the start of the function. */ + now = sys_now(); + + do { + struct sys_timeo *tmptimeout; + sys_timeout_handler handler; + void *arg; + + PBUF_CHECK_FREE_OOSEQ(); + + tmptimeout = next_timeout; + if (tmptimeout == NULL) { + return; + } + + if (TIME_LESS_THAN(now, tmptimeout->time)) { + return; + } + + /* Timeout has expired */ + next_timeout = tmptimeout->next; + handler = tmptimeout->h; + arg = tmptimeout->arg; + current_timeout_due_time = tmptimeout->time; +#if LWIP_DEBUG_TIMERNAMES + if (handler != NULL) { + LWIP_DEBUGF(TIMERS_DEBUG, ("sct calling h=%s t=%"U32_F" arg=%p\n", + tmptimeout->handler_name, sys_now() - tmptimeout->time, arg)); + } +#endif /* LWIP_DEBUG_TIMERNAMES */ + memp_free(MEMP_SYS_TIMEOUT, tmptimeout); + if (handler != NULL) { + handler(arg); + } + LWIP_TCPIP_THREAD_ALIVE(); + + /* Repeat until all expired timers have been called */ + } while (1); +} + +/** Rebase the timeout times to the current time. + * This is necessary if sys_check_timeouts() hasn't been called for a long + * time (e.g. while saving energy) to prevent all timer functions of that + * period being called. + */ +void +sys_restart_timeouts(void) +{ + u32_t now; + u32_t base; + struct sys_timeo *t; + + if (next_timeout == NULL) { + return; + } + + now = sys_now(); + base = next_timeout->time; + + for (t = next_timeout; t != NULL; t = t->next) { + t->time = (t->time - base) + now; + } +} + +/** Return the time left before the next timeout is due. If no timeouts are + * enqueued, returns 0xffffffff + */ +u32_t +sys_timeouts_sleeptime(void) +{ + u32_t now; + + LWIP_ASSERT_CORE_LOCKED(); + + if (next_timeout == NULL) { + return SYS_TIMEOUTS_SLEEPTIME_INFINITE; + } + now = sys_now(); + if (TIME_LESS_THAN(next_timeout->time, now)) { + return 0; + } else { + u32_t ret = (u32_t)(next_timeout->time - now); + LWIP_ASSERT("invalid sleeptime", ret <= LWIP_MAX_TIMEOUT); + return ret; + } +} + +#else /* LWIP_TIMERS && !LWIP_TIMERS_CUSTOM */ +/* Satisfy the TCP code which calls this function */ +void +tcp_timer_needed(void) +{ +} +#endif /* LWIP_TIMERS && !LWIP_TIMERS_CUSTOM */ diff --git a/lib/lwip/core/udp.c b/lib/lwip/core/udp.c new file mode 100644 index 0000000000..23c2be27bd --- /dev/null +++ b/lib/lwip/core/udp.c @@ -0,0 +1,1321 @@ +/** + * @file + * User Datagram Protocol module<br> + * The code for the User Datagram Protocol UDP & UDPLite (RFC 3828).<br> + * See also @ref udp_raw + * + * @defgroup udp_raw UDP + * @ingroup callbackstyle_api + * User Datagram Protocol module<br> + * @see @ref api + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +/* @todo Check the use of '(struct udp_pcb).chksum_len_rx'! + */ + +#include "lwip/opt.h" + +#if LWIP_UDP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/udp.h" +#include "lwip/def.h" +#include "lwip/memp.h" +#include "lwip/inet_chksum.h" +#include "lwip/ip_addr.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/netif.h" +#include "lwip/icmp.h" +#include "lwip/icmp6.h" +#include "lwip/stats.h" +#include "lwip/snmp.h" +#include "lwip/dhcp.h" + +#include <string.h> + +#ifndef UDP_LOCAL_PORT_RANGE_START +/* From http://www.iana.org/assignments/port-numbers: + "The Dynamic and/or Private Ports are those from 49152 through 65535" */ +#define UDP_LOCAL_PORT_RANGE_START 0xc000 +#define UDP_LOCAL_PORT_RANGE_END 0xffff +#define UDP_ENSURE_LOCAL_PORT_RANGE(port) ((u16_t)(((port) & (u16_t)~UDP_LOCAL_PORT_RANGE_START) + UDP_LOCAL_PORT_RANGE_START)) +#endif + +/* last local UDP port */ +static u16_t udp_port = UDP_LOCAL_PORT_RANGE_START; + +/* The list of UDP PCBs */ +/* exported in udp.h (was static) */ +struct udp_pcb *udp_pcbs; + +/** + * Initialize this module. + */ +void +udp_init(void) +{ +#ifdef LWIP_RAND + udp_port = UDP_ENSURE_LOCAL_PORT_RANGE(LWIP_RAND()); +#endif /* LWIP_RAND */ +} + +/** + * Allocate a new local UDP port. + * + * @return a new (free) local UDP port number + */ +static u16_t +udp_new_port(void) +{ + u16_t n = 0; + struct udp_pcb *pcb; + +again: + if (udp_port++ == UDP_LOCAL_PORT_RANGE_END) { + udp_port = UDP_LOCAL_PORT_RANGE_START; + } + /* Check all PCBs. */ + for (pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) { + if (pcb->local_port == udp_port) { + if (++n > (UDP_LOCAL_PORT_RANGE_END - UDP_LOCAL_PORT_RANGE_START)) { + return 0; + } + goto again; + } + } + return udp_port; +} + +/** Common code to see if the current input packet matches the pcb + * (current input packet is accessed via ip(4/6)_current_* macros) + * + * @param pcb pcb to check + * @param inp network interface on which the datagram was received (only used for IPv4) + * @param broadcast 1 if his is an IPv4 broadcast (global or subnet-only), 0 otherwise (only used for IPv4) + * @return 1 on match, 0 otherwise + */ +static u8_t +udp_input_local_match(struct udp_pcb *pcb, struct netif *inp, u8_t broadcast) +{ + LWIP_UNUSED_ARG(inp); /* in IPv6 only case */ + LWIP_UNUSED_ARG(broadcast); /* in IPv6 only case */ + + LWIP_ASSERT("udp_input_local_match: invalid pcb", pcb != NULL); + LWIP_ASSERT("udp_input_local_match: invalid netif", inp != NULL); + + /* check if PCB is bound to specific netif */ + if ((pcb->netif_idx != NETIF_NO_INDEX) && + (pcb->netif_idx != netif_get_index(ip_data.current_input_netif))) { + return 0; + } + + /* Dual-stack: PCBs listening to any IP type also listen to any IP address */ + if (IP_IS_ANY_TYPE_VAL(pcb->local_ip)) { +#if LWIP_IPV4 && IP_SOF_BROADCAST_RECV + if ((broadcast != 0) && !ip_get_option(pcb, SOF_BROADCAST)) { + return 0; + } +#endif /* LWIP_IPV4 && IP_SOF_BROADCAST_RECV */ + return 1; + } + + /* Only need to check PCB if incoming IP version matches PCB IP version */ + if (IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ip_current_dest_addr())) { +#if LWIP_IPV4 + /* Special case: IPv4 broadcast: all or broadcasts in my subnet + * Note: broadcast variable can only be 1 if it is an IPv4 broadcast */ + if (broadcast != 0) { +#if IP_SOF_BROADCAST_RECV + if (ip_get_option(pcb, SOF_BROADCAST)) +#endif /* IP_SOF_BROADCAST_RECV */ + { + if (ip4_addr_isany(ip_2_ip4(&pcb->local_ip)) || + ((ip4_current_dest_addr()->addr == IPADDR_BROADCAST)) || + ip4_addr_net_eq(ip_2_ip4(&pcb->local_ip), ip4_current_dest_addr(), netif_ip4_netmask(inp))) { + return 1; + } + } + } else +#endif /* LWIP_IPV4 */ + /* Handle IPv4 and IPv6: all or exact match */ + if (ip_addr_isany(&pcb->local_ip) || ip_addr_eq(&pcb->local_ip, ip_current_dest_addr())) { + return 1; + } + } + + return 0; +} + +/** + * Process an incoming UDP datagram. + * + * Given an incoming UDP datagram (as a chain of pbufs) this function + * finds a corresponding UDP PCB and hands over the pbuf to the pcbs + * recv function. If no pcb is found or the datagram is incorrect, the + * pbuf is freed. + * + * @param p pbuf to be demultiplexed to a UDP PCB (p->payload pointing to the UDP header) + * @param inp network interface on which the datagram was received. + * + */ +void +udp_input(struct pbuf *p, struct netif *inp) +{ + struct udp_hdr *udphdr; + struct udp_pcb *pcb, *prev; + struct udp_pcb *uncon_pcb; + u16_t src, dest; + u8_t broadcast; + u8_t for_us = 0; + + LWIP_UNUSED_ARG(inp); + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ASSERT("udp_input: invalid pbuf", p != NULL); + LWIP_ASSERT("udp_input: invalid netif", inp != NULL); + + PERF_START; + + UDP_STATS_INC(udp.recv); + + /* Check minimum length (UDP header) */ + if (p->len < UDP_HLEN) { + /* drop short packets */ + LWIP_DEBUGF(UDP_DEBUG, + ("udp_input: short UDP datagram (%"U16_F" bytes) discarded\n", p->tot_len)); + UDP_STATS_INC(udp.lenerr); + UDP_STATS_INC(udp.drop); + MIB2_STATS_INC(mib2.udpinerrors); + pbuf_free(p); + goto end; + } + + udphdr = (struct udp_hdr *)p->payload; + + /* is broadcast packet ? */ + broadcast = ip_addr_isbroadcast(ip_current_dest_addr(), ip_current_netif()); + + LWIP_DEBUGF(UDP_DEBUG, ("udp_input: received datagram of length %"U16_F"\n", p->tot_len)); + + /* convert src and dest ports to host byte order */ + src = lwip_ntohs(udphdr->src); + dest = lwip_ntohs(udphdr->dest); + + udp_debug_print(udphdr); + + /* print the UDP source and destination */ + LWIP_DEBUGF(UDP_DEBUG, ("udp (")); + ip_addr_debug_print_val(UDP_DEBUG, *ip_current_dest_addr()); + LWIP_DEBUGF(UDP_DEBUG, (", %"U16_F") <-- (", lwip_ntohs(udphdr->dest))); + ip_addr_debug_print_val(UDP_DEBUG, *ip_current_src_addr()); + LWIP_DEBUGF(UDP_DEBUG, (", %"U16_F")\n", lwip_ntohs(udphdr->src))); + + pcb = NULL; + prev = NULL; + uncon_pcb = NULL; + /* Iterate through the UDP pcb list for a matching pcb. + * 'Perfect match' pcbs (connected to the remote port & ip address) are + * preferred. If no perfect match is found, the first unconnected pcb that + * matches the local port and ip address gets the datagram. */ + for (pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) { + /* print the PCB local and remote address */ + LWIP_DEBUGF(UDP_DEBUG, ("pcb (")); + ip_addr_debug_print_val(UDP_DEBUG, pcb->local_ip); + LWIP_DEBUGF(UDP_DEBUG, (", %"U16_F") <-- (", pcb->local_port)); + ip_addr_debug_print_val(UDP_DEBUG, pcb->remote_ip); + LWIP_DEBUGF(UDP_DEBUG, (", %"U16_F")\n", pcb->remote_port)); + + /* compare PCB local addr+port to UDP destination addr+port */ + if ((pcb->local_port == dest) && + (udp_input_local_match(pcb, inp, broadcast) != 0)) { + if ((pcb->flags & UDP_FLAGS_CONNECTED) == 0) { + if (uncon_pcb == NULL) { + /* the first unconnected matching PCB */ + uncon_pcb = pcb; +#if LWIP_IPV4 + } else if (broadcast && ip4_current_dest_addr()->addr == IPADDR_BROADCAST) { + /* global broadcast address (only valid for IPv4; match was checked before) */ + if (!IP_IS_V4_VAL(uncon_pcb->local_ip) || !ip4_addr_eq(ip_2_ip4(&uncon_pcb->local_ip), netif_ip4_addr(inp))) { + /* uncon_pcb does not match the input netif, check this pcb */ + if (IP_IS_V4_VAL(pcb->local_ip) && ip4_addr_eq(ip_2_ip4(&pcb->local_ip), netif_ip4_addr(inp))) { + /* better match */ + uncon_pcb = pcb; + } + } +#endif /* LWIP_IPV4 */ + } +#if SO_REUSE + else if (!ip_addr_isany(&pcb->local_ip)) { + /* prefer specific IPs over catch-all */ + uncon_pcb = pcb; + } +#endif /* SO_REUSE */ + } + + /* compare PCB remote addr+port to UDP source addr+port */ + if ((pcb->remote_port == src) && + (ip_addr_isany_val(pcb->remote_ip) || + ip_addr_eq(&pcb->remote_ip, ip_current_src_addr()))) { + /* the first fully matching PCB */ + if (prev != NULL) { + /* move the pcb to the front of udp_pcbs so that is + found faster next time */ + prev->next = pcb->next; + pcb->next = udp_pcbs; + udp_pcbs = pcb; + } else { + UDP_STATS_INC(udp.cachehit); + } + break; + } + } + + prev = pcb; + } + /* no fully matching pcb found? then look for an unconnected pcb */ + if (pcb == NULL) { + pcb = uncon_pcb; + } + + /* Check checksum if this is a match or if it was directed at us. */ + if (pcb != NULL) { + for_us = 1; + } else { +#if LWIP_IPV6 + if (ip_current_is_v6()) { + for_us = netif_get_ip6_addr_match(inp, ip6_current_dest_addr()) >= 0; + } +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 + if (!ip_current_is_v6()) { + for_us = ip4_addr_eq(netif_ip4_addr(inp), ip4_current_dest_addr()); + } +#endif /* LWIP_IPV4 */ + } + + if (for_us) { + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_input: calculating checksum\n")); +#if CHECKSUM_CHECK_UDP + IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_CHECK_UDP) { +#if LWIP_UDPLITE + if (ip_current_header_proto() == IP_PROTO_UDPLITE) { + /* Do the UDP Lite checksum */ + u16_t chklen = lwip_ntohs(udphdr->len); + if (chklen < sizeof(struct udp_hdr)) { + if (chklen == 0) { + /* For UDP-Lite, checksum length of 0 means checksum + over the complete packet (See RFC 3828 chap. 3.1) */ + chklen = p->tot_len; + } else { + /* At least the UDP-Lite header must be covered by the + checksum! (Again, see RFC 3828 chap. 3.1) */ + goto chkerr; + } + } + if (ip_chksum_pseudo_partial(p, IP_PROTO_UDPLITE, + p->tot_len, chklen, + ip_current_src_addr(), ip_current_dest_addr()) != 0) { + goto chkerr; + } + } else +#endif /* LWIP_UDPLITE */ + { + if (udphdr->chksum != 0) { + if (ip_chksum_pseudo(p, IP_PROTO_UDP, p->tot_len, + ip_current_src_addr(), + ip_current_dest_addr()) != 0) { + goto chkerr; + } + } + } + } +#endif /* CHECKSUM_CHECK_UDP */ + if (pbuf_remove_header(p, UDP_HLEN)) { + /* Can we cope with this failing? Just assert for now */ + LWIP_ASSERT("pbuf_remove_header failed", 0); + UDP_STATS_INC(udp.drop); + MIB2_STATS_INC(mib2.udpinerrors); + pbuf_free(p); + goto end; + } + + if (pcb != NULL) { + MIB2_STATS_INC(mib2.udpindatagrams); +#if SO_REUSE && SO_REUSE_RXTOALL + if (ip_get_option(pcb, SOF_REUSEADDR) && + (broadcast || ip_addr_ismulticast(ip_current_dest_addr()))) { + /* pass broadcast- or multicast packets to all multicast pcbs + if SOF_REUSEADDR is set on the first match */ + struct udp_pcb *mpcb; + for (mpcb = udp_pcbs; mpcb != NULL; mpcb = mpcb->next) { + if (mpcb != pcb) { + /* compare PCB local addr+port to UDP destination addr+port */ + if ((mpcb->local_port == dest) && + (udp_input_local_match(mpcb, inp, broadcast) != 0)) { + /* pass a copy of the packet to all local matches */ + if (mpcb->recv != NULL) { + struct pbuf *q; + q = pbuf_clone(PBUF_RAW, PBUF_POOL, p); + if (q != NULL) { + mpcb->recv(mpcb->recv_arg, mpcb, q, ip_current_src_addr(), src); + } + } + } + } + } + } +#endif /* SO_REUSE && SO_REUSE_RXTOALL */ + /* callback */ + if (pcb->recv != NULL) { + /* now the recv function is responsible for freeing p */ + pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr(), src); + } else { + /* no recv function registered? then we have to free the pbuf! */ + pbuf_free(p); + goto end; + } + } else { + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_input: not for us.\n")); + +#if LWIP_ICMP || LWIP_ICMP6 + /* No match was found, send ICMP destination port unreachable unless + destination address was broadcast/multicast. */ + if (!broadcast && !ip_addr_ismulticast(ip_current_dest_addr())) { + /* move payload pointer back to ip header */ + pbuf_header_force(p, (s16_t)(ip_current_header_tot_len() + UDP_HLEN)); + icmp_port_unreach(ip_current_is_v6(), p); + } +#endif /* LWIP_ICMP || LWIP_ICMP6 */ + UDP_STATS_INC(udp.proterr); + UDP_STATS_INC(udp.drop); + MIB2_STATS_INC(mib2.udpnoports); + pbuf_free(p); + } + } else { + pbuf_free(p); + } +end: + PERF_STOP("udp_input"); + return; +#if CHECKSUM_CHECK_UDP +chkerr: + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("udp_input: UDP (or UDP Lite) datagram discarded due to failing checksum\n")); + UDP_STATS_INC(udp.chkerr); + UDP_STATS_INC(udp.drop); + MIB2_STATS_INC(mib2.udpinerrors); + pbuf_free(p); + PERF_STOP("udp_input"); +#endif /* CHECKSUM_CHECK_UDP */ +} + +/** + * @ingroup udp_raw + * Sends the pbuf p using UDP. The pbuf is not deallocated. + * + * + * @param pcb UDP PCB used to send the data. + * @param p chain of pbuf's to be sent. + * + * The datagram will be sent to the current remote_ip & remote_port + * stored in pcb. If the pcb is not bound to a port, it will + * automatically be bound to a random port. + * + * @return lwIP error code. + * - ERR_OK. Successful. No error occurred. + * - ERR_MEM. Out of memory. + * - ERR_RTE. Could not find route to destination address. + * - ERR_VAL. No PCB or PCB is dual-stack + * - More errors could be returned by lower protocol layers. + * + * @see udp_disconnect() udp_sendto() + */ +err_t +udp_send(struct udp_pcb *pcb, struct pbuf *p) +{ + LWIP_ERROR("udp_send: invalid pcb", pcb != NULL, return ERR_ARG); + LWIP_ERROR("udp_send: invalid pbuf", p != NULL, return ERR_ARG); + + if (IP_IS_ANY_TYPE_VAL(pcb->remote_ip)) { + return ERR_VAL; + } + + /* send to the packet using remote ip and port stored in the pcb */ + return udp_sendto(pcb, p, &pcb->remote_ip, pcb->remote_port); +} + +#if LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP +/** @ingroup udp_raw + * Same as udp_send() but with checksum + */ +err_t +udp_send_chksum(struct udp_pcb *pcb, struct pbuf *p, + u8_t have_chksum, u16_t chksum) +{ + LWIP_ERROR("udp_send_chksum: invalid pcb", pcb != NULL, return ERR_ARG); + LWIP_ERROR("udp_send_chksum: invalid pbuf", p != NULL, return ERR_ARG); + + if (IP_IS_ANY_TYPE_VAL(pcb->remote_ip)) { + return ERR_VAL; + } + + /* send to the packet using remote ip and port stored in the pcb */ + return udp_sendto_chksum(pcb, p, &pcb->remote_ip, pcb->remote_port, + have_chksum, chksum); +} +#endif /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ + +/** + * @ingroup udp_raw + * Send data to a specified address using UDP. + * + * @param pcb UDP PCB used to send the data. + * @param p chain of pbuf's to be sent. + * @param dst_ip Destination IP address. + * @param dst_port Destination UDP port. + * + * dst_ip & dst_port are expected to be in the same byte order as in the pcb. + * + * If the PCB already has a remote address association, it will + * be restored after the data is sent. + * + * @return lwIP error code (@see udp_send for possible error codes) + * + * @see udp_disconnect() udp_send() + */ +err_t +udp_sendto(struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port) +{ +#if LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP + return udp_sendto_chksum(pcb, p, dst_ip, dst_port, 0, 0); +} + +/** @ingroup udp_raw + * Same as udp_sendto(), but with checksum */ +err_t +udp_sendto_chksum(struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *dst_ip, + u16_t dst_port, u8_t have_chksum, u16_t chksum) +{ +#endif /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ + struct netif *netif; + + LWIP_ERROR("udp_sendto: invalid pcb", pcb != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto: invalid pbuf", p != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto: invalid dst_ip", dst_ip != NULL, return ERR_ARG); + + if (!IP_ADDR_PCB_VERSION_MATCH(pcb, dst_ip)) { + return ERR_VAL; + } + + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_send\n")); + + if (pcb->netif_idx != NETIF_NO_INDEX) { + netif = netif_get_by_index(pcb->netif_idx); + } else { +#if LWIP_MULTICAST_TX_OPTIONS + netif = NULL; + if (ip_addr_ismulticast(dst_ip)) { + /* For IPv6, the interface to use for packets with a multicast destination + * is specified using an interface index. The same approach may be used for + * IPv4 as well, in which case it overrides the IPv4 multicast override + * address below. Here we have to look up the netif by going through the + * list, but by doing so we skip a route lookup. If the interface index has + * gone stale, we fall through and do the regular route lookup after all. */ + if (pcb->mcast_ifindex != NETIF_NO_INDEX) { + netif = netif_get_by_index(pcb->mcast_ifindex); + } +#if LWIP_IPV4 + else +#if LWIP_IPV6 + if (IP_IS_V4(dst_ip)) +#endif /* LWIP_IPV6 */ + { + /* IPv4 does not use source-based routing by default, so we use an + administratively selected interface for multicast by default. + However, this can be overridden by setting an interface address + in pcb->mcast_ip4 that is used for routing. If this routing lookup + fails, we try regular routing as though no override was set. */ + if (!ip4_addr_isany_val(pcb->mcast_ip4) && + !ip4_addr_eq(&pcb->mcast_ip4, IP4_ADDR_BROADCAST)) { + netif = ip4_route_src(ip_2_ip4(&pcb->local_ip), &pcb->mcast_ip4); + } + } +#endif /* LWIP_IPV4 */ + } + + if (netif == NULL) +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + { + /* find the outgoing network interface for this packet */ + netif = ip_route(&pcb->local_ip, dst_ip); + } + } + + /* no outgoing network interface could be found? */ + if (netif == NULL) { + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("udp_send: No route to ")); + ip_addr_debug_print(UDP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, dst_ip); + LWIP_DEBUGF(UDP_DEBUG, ("\n")); + UDP_STATS_INC(udp.rterr); + return ERR_RTE; + } +#if LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP + return udp_sendto_if_chksum(pcb, p, dst_ip, dst_port, netif, have_chksum, chksum); +#else /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ + return udp_sendto_if(pcb, p, dst_ip, dst_port, netif); +#endif /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ +} + +/** + * @ingroup udp_raw + * Send data to a specified address using UDP. + * The netif used for sending can be specified. + * + * This function exists mainly for DHCP, to be able to send UDP packets + * on a netif that is still down. + * + * @param pcb UDP PCB used to send the data. + * @param p chain of pbuf's to be sent. + * @param dst_ip Destination IP address. + * @param dst_port Destination UDP port. + * @param netif the netif used for sending. + * + * dst_ip & dst_port are expected to be in the same byte order as in the pcb. + * + * @return lwIP error code (@see udp_send for possible error codes) + * + * @see udp_disconnect() udp_send() + */ +err_t +udp_sendto_if(struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port, struct netif *netif) +{ +#if LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP + return udp_sendto_if_chksum(pcb, p, dst_ip, dst_port, netif, 0, 0); +} + +/** Same as udp_sendto_if(), but with checksum */ +err_t +udp_sendto_if_chksum(struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *dst_ip, + u16_t dst_port, struct netif *netif, u8_t have_chksum, + u16_t chksum) +{ +#endif /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ + const ip_addr_t *src_ip; + + LWIP_ERROR("udp_sendto_if: invalid pcb", pcb != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto_if: invalid pbuf", p != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto_if: invalid dst_ip", dst_ip != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto_if: invalid netif", netif != NULL, return ERR_ARG); + + if (!IP_ADDR_PCB_VERSION_MATCH(pcb, dst_ip)) { + return ERR_VAL; + } + + /* PCB local address is IP_ANY_ADDR or multicast? */ +#if LWIP_IPV6 + if (IP_IS_V6(dst_ip)) { + if (ip6_addr_isany(ip_2_ip6(&pcb->local_ip)) || + ip6_addr_ismulticast(ip_2_ip6(&pcb->local_ip))) { + src_ip = ip6_select_source_address(netif, ip_2_ip6(dst_ip)); + if (src_ip == NULL) { + /* No suitable source address was found. */ + return ERR_RTE; + } + } else { + /* use UDP PCB local IPv6 address as source address, if still valid. */ + if (netif_get_ip6_addr_match(netif, ip_2_ip6(&pcb->local_ip)) < 0) { + /* Address isn't valid anymore. */ + return ERR_RTE; + } + src_ip = &pcb->local_ip; + } + } +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 && LWIP_IPV6 + else +#endif /* LWIP_IPV4 && LWIP_IPV6 */ +#if LWIP_IPV4 + if (ip4_addr_isany(ip_2_ip4(&pcb->local_ip)) || + ip4_addr_ismulticast(ip_2_ip4(&pcb->local_ip))) { + /* if the local_ip is any or multicast + * use the outgoing network interface IP address as source address */ + src_ip = netif_ip_addr4(netif); + } else { + /* check if UDP PCB local IP address is correct + * this could be an old address if netif->ip_addr has changed */ + if (!ip4_addr_eq(ip_2_ip4(&(pcb->local_ip)), netif_ip4_addr(netif))) { + /* local_ip doesn't match, drop the packet */ + return ERR_RTE; + } + /* use UDP PCB local IP address as source address */ + src_ip = &pcb->local_ip; + } +#endif /* LWIP_IPV4 */ +#if LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP + return udp_sendto_if_src_chksum(pcb, p, dst_ip, dst_port, netif, have_chksum, chksum, src_ip); +#else /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ + return udp_sendto_if_src(pcb, p, dst_ip, dst_port, netif, src_ip); +#endif /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ +} + +/** @ingroup udp_raw + * Same as @ref udp_sendto_if, but with source address */ +err_t +udp_sendto_if_src(struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port, struct netif *netif, const ip_addr_t *src_ip) +{ +#if LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP + return udp_sendto_if_src_chksum(pcb, p, dst_ip, dst_port, netif, 0, 0, src_ip); +} + +/** Same as udp_sendto_if_src(), but with checksum */ +err_t +udp_sendto_if_src_chksum(struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *dst_ip, + u16_t dst_port, struct netif *netif, u8_t have_chksum, + u16_t chksum, const ip_addr_t *src_ip) +{ +#endif /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ + struct udp_hdr *udphdr; + err_t err; + struct pbuf *q; /* q will be sent down the stack */ + u8_t ip_proto; + u8_t ttl; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("udp_sendto_if_src: invalid pcb", pcb != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto_if_src: invalid pbuf", p != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto_if_src: invalid dst_ip", dst_ip != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto_if_src: invalid src_ip", src_ip != NULL, return ERR_ARG); + LWIP_ERROR("udp_sendto_if_src: invalid netif", netif != NULL, return ERR_ARG); + + if (!IP_ADDR_PCB_VERSION_MATCH(pcb, src_ip) || + !IP_ADDR_PCB_VERSION_MATCH(pcb, dst_ip)) { + return ERR_VAL; + } + +#if LWIP_IPV4 && IP_SOF_BROADCAST + /* broadcast filter? */ + if (!ip_get_option(pcb, SOF_BROADCAST) && +#if LWIP_IPV6 + IP_IS_V4(dst_ip) && +#endif /* LWIP_IPV6 */ + ip_addr_isbroadcast(dst_ip, netif)) { + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, + ("udp_sendto_if: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb)); + return ERR_VAL; + } +#endif /* LWIP_IPV4 && IP_SOF_BROADCAST */ + + /* if the PCB is not yet bound to a port, bind it here */ + if (pcb->local_port == 0) { + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_send: not yet bound to a port, binding now\n")); + err = udp_bind(pcb, &pcb->local_ip, pcb->local_port); + if (err != ERR_OK) { + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("udp_send: forced port bind failed\n")); + return err; + } + } + + /* packet too large to add a UDP header without causing an overflow? */ + if ((u16_t)(p->tot_len + UDP_HLEN) < p->tot_len) { + return ERR_MEM; + } + /* not enough space to add an UDP header to first pbuf in given p chain? */ + if (pbuf_add_header(p, UDP_HLEN)) { + /* allocate header in a separate new pbuf */ + q = pbuf_alloc(PBUF_IP, UDP_HLEN, PBUF_RAM); + /* new header pbuf could not be allocated? */ + if (q == NULL) { + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("udp_send: could not allocate header\n")); + return ERR_MEM; + } + if (p->tot_len != 0) { + /* chain header q in front of given pbuf p (only if p contains data) */ + pbuf_chain(q, p); + } + /* first pbuf q points to header pbuf */ + LWIP_DEBUGF(UDP_DEBUG, + ("udp_send: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p)); + } else { + /* adding space for header within p succeeded */ + /* first pbuf q equals given pbuf */ + q = p; + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: added header in given pbuf %p\n", (void *)p)); + } + LWIP_ASSERT("check that first pbuf can hold struct udp_hdr", + (q->len >= sizeof(struct udp_hdr))); + /* q now represents the packet to be sent */ + udphdr = (struct udp_hdr *)q->payload; + udphdr->src = lwip_htons(pcb->local_port); + udphdr->dest = lwip_htons(dst_port); + /* in UDP, 0 checksum means 'no checksum' */ + udphdr->chksum = 0x0000; + + /* Multicast Loop? */ +#if LWIP_MULTICAST_TX_OPTIONS + if (((pcb->flags & UDP_FLAGS_MULTICAST_LOOP) != 0) && ip_addr_ismulticast(dst_ip)) { + q->flags |= PBUF_FLAG_MCASTLOOP; + } +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: sending datagram of length %"U16_F"\n", q->tot_len)); + +#if LWIP_UDPLITE + /* UDP Lite protocol? */ + if (pcb->flags & UDP_FLAGS_UDPLITE) { + u16_t chklen, chklen_hdr; + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE packet length %"U16_F"\n", q->tot_len)); + /* set UDP message length in UDP header */ + chklen_hdr = chklen = pcb->chksum_len_tx; + if ((chklen < sizeof(struct udp_hdr)) || (chklen > q->tot_len)) { + if (chklen != 0) { + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE pcb->chksum_len is illegal: %"U16_F"\n", chklen)); + } + /* For UDP-Lite, checksum length of 0 means checksum + over the complete packet. (See RFC 3828 chap. 3.1) + At least the UDP-Lite header must be covered by the + checksum, therefore, if chksum_len has an illegal + value, we generate the checksum over the complete + packet to be safe. */ + chklen_hdr = 0; + chklen = q->tot_len; + } + udphdr->len = lwip_htons(chklen_hdr); + /* calculate checksum */ +#if CHECKSUM_GEN_UDP + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_UDP) { +#if LWIP_CHECKSUM_ON_COPY + if (have_chksum) { + chklen = UDP_HLEN; + } +#endif /* LWIP_CHECKSUM_ON_COPY */ + udphdr->chksum = ip_chksum_pseudo_partial(q, IP_PROTO_UDPLITE, + q->tot_len, chklen, src_ip, dst_ip); +#if LWIP_CHECKSUM_ON_COPY + if (have_chksum) { + u32_t acc; + acc = udphdr->chksum + (u16_t)~(chksum); + udphdr->chksum = FOLD_U32T(acc); + } +#endif /* LWIP_CHECKSUM_ON_COPY */ + + /* chksum zero must become 0xffff, as zero means 'no checksum' */ + if (udphdr->chksum == 0x0000) { + udphdr->chksum = 0xffff; + } + } +#endif /* CHECKSUM_GEN_UDP */ + + ip_proto = IP_PROTO_UDPLITE; + } else +#endif /* LWIP_UDPLITE */ + { /* UDP */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP packet length %"U16_F"\n", q->tot_len)); + udphdr->len = lwip_htons(q->tot_len); + /* calculate checksum */ +#if CHECKSUM_GEN_UDP + IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_UDP) { + /* Checksum is mandatory over IPv6. */ + if (IP_IS_V6(dst_ip) || (pcb->flags & UDP_FLAGS_NOCHKSUM) == 0) { + u16_t udpchksum; +#if LWIP_CHECKSUM_ON_COPY + if (have_chksum) { + u32_t acc; + udpchksum = ip_chksum_pseudo_partial(q, IP_PROTO_UDP, + q->tot_len, UDP_HLEN, src_ip, dst_ip); + acc = udpchksum + (u16_t)~(chksum); + udpchksum = FOLD_U32T(acc); + } else +#endif /* LWIP_CHECKSUM_ON_COPY */ + { + udpchksum = ip_chksum_pseudo(q, IP_PROTO_UDP, q->tot_len, + src_ip, dst_ip); + } + + /* chksum zero must become 0xffff, as zero means 'no checksum' */ + if (udpchksum == 0x0000) { + udpchksum = 0xffff; + } + udphdr->chksum = udpchksum; + } + } +#endif /* CHECKSUM_GEN_UDP */ + ip_proto = IP_PROTO_UDP; + } + + /* Determine TTL to use */ +#if LWIP_MULTICAST_TX_OPTIONS + ttl = (ip_addr_ismulticast(dst_ip) ? udp_get_multicast_ttl(pcb) : pcb->ttl); +#else /* LWIP_MULTICAST_TX_OPTIONS */ + ttl = pcb->ttl; +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP checksum 0x%04"X16_F"\n", udphdr->chksum)); + LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,0x%02"X16_F",)\n", (u16_t)ip_proto)); + /* output to IP */ + NETIF_SET_HINTS(netif, &(pcb->netif_hints)); + err = ip_output_if_src(q, src_ip, dst_ip, ttl, pcb->tos, ip_proto, netif); + NETIF_RESET_HINTS(netif); + + /* @todo: must this be increased even if error occurred? */ + MIB2_STATS_INC(mib2.udpoutdatagrams); + + /* did we chain a separate header pbuf earlier? */ + if (q != p) { + /* free the header pbuf */ + pbuf_free(q); + q = NULL; + /* p is still referenced by the caller, and will live on */ + } + + UDP_STATS_INC(udp.xmit); + return err; +} + +/** + * @ingroup udp_raw + * Bind an UDP PCB. + * + * @param pcb UDP PCB to be bound with a local address ipaddr and port. + * @param ipaddr local IP address to bind with. Use IP_ANY_TYPE to + * bind to all local interfaces. + * @param port local UDP port to bind with. Use 0 to automatically bind + * to a random port between UDP_LOCAL_PORT_RANGE_START and + * UDP_LOCAL_PORT_RANGE_END. + * + * ipaddr & port are expected to be in the same byte order as in the pcb. + * + * @return lwIP error code. + * - ERR_OK. Successful. No error occurred. + * - ERR_USE. The specified ipaddr and port are already bound to by + * another UDP PCB. + * + * @see udp_disconnect() + */ +err_t +udp_bind(struct udp_pcb *pcb, const ip_addr_t *ipaddr, u16_t port) +{ + struct udp_pcb *ipcb; + u8_t rebind; +#if LWIP_IPV6 && LWIP_IPV6_SCOPES + ip_addr_t zoned_ipaddr; +#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */ + + LWIP_ASSERT_CORE_LOCKED(); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IPv4 ANY) to subsequent functions */ + if (ipaddr == NULL) { + ipaddr = IP4_ADDR_ANY; + } +#else /* LWIP_IPV4 */ + LWIP_ERROR("udp_bind: invalid ipaddr", ipaddr != NULL, return ERR_ARG); +#endif /* LWIP_IPV4 */ + + LWIP_ERROR("udp_bind: invalid pcb", pcb != NULL, return ERR_ARG); + + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_bind(ipaddr = ")); + ip_addr_debug_print(UDP_DEBUG | LWIP_DBG_TRACE, ipaddr); + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, (", port = %"U16_F")\n", port)); + + rebind = 0; + /* Check for double bind and rebind of the same pcb */ + for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) { + /* is this UDP PCB already on active list? */ + if (pcb == ipcb) { + rebind = 1; + break; + } + } + +#if LWIP_IPV6 && LWIP_IPV6_SCOPES + /* If the given IP address should have a zone but doesn't, assign one now. + * This is legacy support: scope-aware callers should always provide properly + * zoned source addresses. Do the zone selection before the address-in-use + * check below; as such we have to make a temporary copy of the address. */ + if (IP_IS_V6(ipaddr) && ip6_addr_lacks_zone(ip_2_ip6(ipaddr), IP6_UNKNOWN)) { + ip_addr_copy(zoned_ipaddr, *ipaddr); + ip6_addr_select_zone(ip_2_ip6(&zoned_ipaddr), ip_2_ip6(&zoned_ipaddr)); + ipaddr = &zoned_ipaddr; + } +#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */ + + /* no port specified? */ + if (port == 0) { + port = udp_new_port(); + if (port == 0) { + /* no more ports available in local range */ + LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: out of free UDP ports\n")); + return ERR_USE; + } + } else { + for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) { + if (pcb != ipcb) { + /* By default, we don't allow to bind to a port that any other udp + PCB is already bound to, unless *all* PCBs with that port have tha + REUSEADDR flag set. */ +#if SO_REUSE + if (!ip_get_option(pcb, SOF_REUSEADDR) || + !ip_get_option(ipcb, SOF_REUSEADDR)) +#endif /* SO_REUSE */ + { + /* port matches that of PCB in list and REUSEADDR not set -> reject */ + if ((ipcb->local_port == port) && + (((IP_GET_TYPE(&ipcb->local_ip) == IP_GET_TYPE(ipaddr)) && + /* IP address matches or any IP used? */ + (ip_addr_eq(&ipcb->local_ip, ipaddr) || + ip_addr_isany(ipaddr) || + ip_addr_isany(&ipcb->local_ip))) || + (IP_GET_TYPE(&ipcb->local_ip) == IPADDR_TYPE_ANY) || + (IP_GET_TYPE(ipaddr) == IPADDR_TYPE_ANY))) { + /* other PCB already binds to this local IP and port */ + LWIP_DEBUGF(UDP_DEBUG, + ("udp_bind: local port %"U16_F" already bound by another pcb\n", port)); + return ERR_USE; + } + } + } + } + } + + ip_addr_set_ipaddr(&pcb->local_ip, ipaddr); + + pcb->local_port = port; + mib2_udp_bind(pcb); + /* pcb not active yet? */ + if (rebind == 0) { + /* place the PCB on the active list if not already there */ + pcb->next = udp_pcbs; + udp_pcbs = pcb; + } + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("udp_bind: bound to ")); + ip_addr_debug_print_val(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, pcb->local_ip); + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, (", port %"U16_F")\n", pcb->local_port)); + return ERR_OK; +} + +/** + * @ingroup udp_raw + * Bind an UDP PCB to a specific netif. + * After calling this function, all packets received via this PCB + * are guaranteed to have come in via the specified netif, and all + * outgoing packets will go out via the specified netif. + * + * @param pcb UDP PCB to be bound. + * @param netif netif to bind udp pcb to. Can be NULL. + * + * @see udp_disconnect() + */ +void +udp_bind_netif(struct udp_pcb *pcb, const struct netif *netif) +{ + LWIP_ASSERT_CORE_LOCKED(); + + if (netif != NULL) { + pcb->netif_idx = netif_get_index(netif); + } else { + pcb->netif_idx = NETIF_NO_INDEX; + } +} + +/** + * @ingroup udp_raw + * Sets the remote end of the pcb. This function does not generate any + * network traffic, but only sets the remote address of the pcb. + * + * @param pcb UDP PCB to be connected with remote address ipaddr and port. + * @param ipaddr remote IP address to connect with. + * @param port remote UDP port to connect with. + * + * @return lwIP error code + * + * ipaddr & port are expected to be in the same byte order as in the pcb. + * + * The udp pcb is bound to a random local port if not already bound. + * + * @see udp_disconnect() + */ +err_t +udp_connect(struct udp_pcb *pcb, const ip_addr_t *ipaddr, u16_t port) +{ + struct udp_pcb *ipcb; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("udp_connect: invalid pcb", pcb != NULL, return ERR_ARG); + LWIP_ERROR("udp_connect: invalid ipaddr", ipaddr != NULL, return ERR_ARG); + + if (pcb->local_port == 0) { + err_t err = udp_bind(pcb, &pcb->local_ip, pcb->local_port); + if (err != ERR_OK) { + return err; + } + } + + ip_addr_set_ipaddr(&pcb->remote_ip, ipaddr); +#if LWIP_IPV6 && LWIP_IPV6_SCOPES + /* If the given IP address should have a zone but doesn't, assign one now, + * using the bound address to make a more informed decision when possible. */ + if (IP_IS_V6(&pcb->remote_ip) && + ip6_addr_lacks_zone(ip_2_ip6(&pcb->remote_ip), IP6_UNKNOWN)) { + ip6_addr_select_zone(ip_2_ip6(&pcb->remote_ip), ip_2_ip6(&pcb->local_ip)); + } +#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */ + + pcb->remote_port = port; + pcb->flags |= UDP_FLAGS_CONNECTED; + + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("udp_connect: connected to ")); + ip_addr_debug_print_val(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, + pcb->remote_ip); + LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, (", port %"U16_F")\n", pcb->remote_port)); + + /* Insert UDP PCB into the list of active UDP PCBs. */ + for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) { + if (pcb == ipcb) { + /* already on the list, just return */ + return ERR_OK; + } + } + /* PCB not yet on the list, add PCB now */ + pcb->next = udp_pcbs; + udp_pcbs = pcb; + return ERR_OK; +} + +/** + * @ingroup udp_raw + * Remove the remote end of the pcb. This function does not generate + * any network traffic, but only removes the remote address of the pcb. + * + * @param pcb the udp pcb to disconnect. + */ +void +udp_disconnect(struct udp_pcb *pcb) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("udp_disconnect: invalid pcb", pcb != NULL, return); + + /* reset remote address association */ +#if LWIP_IPV4 && LWIP_IPV6 + if (IP_IS_ANY_TYPE_VAL(pcb->local_ip)) { + ip_addr_copy(pcb->remote_ip, *IP_ANY_TYPE); + } else { +#endif + ip_addr_set_any(IP_IS_V6_VAL(pcb->remote_ip), &pcb->remote_ip); +#if LWIP_IPV4 && LWIP_IPV6 + } +#endif + pcb->remote_port = 0; + pcb->netif_idx = NETIF_NO_INDEX; + /* mark PCB as unconnected */ + udp_clear_flags(pcb, UDP_FLAGS_CONNECTED); +} + +/** + * @ingroup udp_raw + * Set a receive callback for a UDP PCB. + * This callback will be called when receiving a datagram for the pcb. + * + * @param pcb the pcb for which to set the recv callback + * @param recv function pointer of the callback function + * @param recv_arg additional argument to pass to the callback function + */ +void +udp_recv(struct udp_pcb *pcb, udp_recv_fn recv, void *recv_arg) +{ + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("udp_recv: invalid pcb", pcb != NULL, return); + + /* remember recv() callback and user data */ + pcb->recv = recv; + pcb->recv_arg = recv_arg; +} + +/** + * @ingroup udp_raw + * Removes and deallocates the pcb. + * + * @param pcb UDP PCB to be removed. The PCB is removed from the list of + * UDP PCB's and the data structure is freed from memory. + * + * @see udp_new() + */ +void +udp_remove(struct udp_pcb *pcb) +{ + struct udp_pcb *pcb2; + + LWIP_ASSERT_CORE_LOCKED(); + + LWIP_ERROR("udp_remove: invalid pcb", pcb != NULL, return); + + mib2_udp_unbind(pcb); + /* pcb to be removed is first in list? */ + if (udp_pcbs == pcb) { + /* make list start at 2nd pcb */ + udp_pcbs = udp_pcbs->next; + /* pcb not 1st in list */ + } else { + for (pcb2 = udp_pcbs; pcb2 != NULL; pcb2 = pcb2->next) { + /* find pcb in udp_pcbs list */ + if (pcb2->next != NULL && pcb2->next == pcb) { + /* remove pcb from list */ + pcb2->next = pcb->next; + break; + } + } + } + memp_free(MEMP_UDP_PCB, pcb); +} + +/** + * @ingroup udp_raw + * Creates a new UDP pcb which can be used for UDP communication. The + * pcb is not active until it has either been bound to a local address + * or connected to a remote address. + * @see MEMP_NUM_UDP_PCB + * + * @return The UDP PCB which was created. NULL if the PCB data structure + * could not be allocated. + * + * @see udp_remove() + */ +struct udp_pcb * +udp_new(void) +{ + struct udp_pcb *pcb; + + LWIP_ASSERT_CORE_LOCKED(); + + pcb = (struct udp_pcb *)memp_malloc(MEMP_UDP_PCB); + /* could allocate UDP PCB? */ + if (pcb != NULL) { + /* UDP Lite: by initializing to all zeroes, chksum_len is set to 0 + * which means checksum is generated over the whole datagram per default + * (recommended as default by RFC 3828). */ + /* initialize PCB to all zeroes */ + memset(pcb, 0, sizeof(struct udp_pcb)); + pcb->ttl = UDP_TTL; +#if LWIP_MULTICAST_TX_OPTIONS + udp_set_multicast_ttl(pcb, UDP_TTL); +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + pcb_tci_init(pcb); + } + return pcb; +} + +/** + * @ingroup udp_raw + * Create a UDP PCB for specific IP type. + * The pcb is not active until it has either been bound to a local address + * or connected to a remote address. + * @see MEMP_NUM_UDP_PCB + * + * @param type IP address type, see @ref lwip_ip_addr_type definitions. + * If you want to listen to IPv4 and IPv6 (dual-stack) packets, + * supply @ref IPADDR_TYPE_ANY as argument and bind to @ref IP_ANY_TYPE. + * @return The UDP PCB which was created. NULL if the PCB data structure + * could not be allocated. + * + * @see udp_remove() + */ +struct udp_pcb * +udp_new_ip_type(u8_t type) +{ + struct udp_pcb *pcb; + + LWIP_ASSERT_CORE_LOCKED(); + + pcb = udp_new(); +#if LWIP_IPV4 && LWIP_IPV6 + if (pcb != NULL) { + IP_SET_TYPE_VAL(pcb->local_ip, type); + IP_SET_TYPE_VAL(pcb->remote_ip, type); + } +#else + LWIP_UNUSED_ARG(type); +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + return pcb; +} + +/** This function is called from netif.c when address is changed + * + * @param old_addr IP address of the netif before change + * @param new_addr IP address of the netif after change + */ +void udp_netif_ip_addr_changed(const ip_addr_t *old_addr, const ip_addr_t *new_addr) +{ + struct udp_pcb *upcb; + + if (!ip_addr_isany(old_addr) && !ip_addr_isany(new_addr)) { + for (upcb = udp_pcbs; upcb != NULL; upcb = upcb->next) { + /* PCB bound to current local interface address? */ + if (ip_addr_eq(&upcb->local_ip, old_addr)) { + /* The PCB is bound to the old ipaddr and + * is set to bound to the new one instead */ + ip_addr_copy(upcb->local_ip, *new_addr); + } + } + } +} + +#if UDP_DEBUG +/** + * Print UDP header information for debug purposes. + * + * @param udphdr pointer to the udp header in memory. + */ +void +udp_debug_print(struct udp_hdr *udphdr) +{ + LWIP_DEBUGF(UDP_DEBUG, ("UDP header:\n")); + LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(UDP_DEBUG, ("| %5"U16_F" | %5"U16_F" | (src port, dest port)\n", + lwip_ntohs(udphdr->src), lwip_ntohs(udphdr->dest))); + LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); + LWIP_DEBUGF(UDP_DEBUG, ("| %5"U16_F" | 0x%04"X16_F" | (len, chksum)\n", + lwip_ntohs(udphdr->len), lwip_ntohs(udphdr->chksum))); + LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); +} +#endif /* UDP_DEBUG */ + +#endif /* LWIP_UDP */ diff --git a/lib/lwip/include/compat/posix/arpa/inet.h b/lib/lwip/include/compat/posix/arpa/inet.h new file mode 100644 index 0000000000..0ed9baf3d9 --- /dev/null +++ b/lib/lwip/include/compat/posix/arpa/inet.h @@ -0,0 +1,33 @@ +/** + * @file + * This file is a posix wrapper for lwip/sockets.h. + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "lwip/sockets.h" diff --git a/lib/lwip/include/compat/posix/net/if.h b/lib/lwip/include/compat/posix/net/if.h new file mode 100644 index 0000000000..8b8e48198d --- /dev/null +++ b/lib/lwip/include/compat/posix/net/if.h @@ -0,0 +1,36 @@ +/** + * @file + * This file is a posix wrapper for lwip/if_api.h. + */ + +/* + * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. joel.cunningham@garmin.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "lwip/if_api.h" diff --git a/lib/lwip/include/compat/posix/netdb.h b/lib/lwip/include/compat/posix/netdb.h new file mode 100644 index 0000000000..12d4c7f566 --- /dev/null +++ b/lib/lwip/include/compat/posix/netdb.h @@ -0,0 +1,33 @@ +/** + * @file + * This file is a posix wrapper for lwip/netdb.h. + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "lwip/netdb.h" diff --git a/lib/lwip/include/compat/posix/sys/socket.h b/lib/lwip/include/compat/posix/sys/socket.h new file mode 100644 index 0000000000..0ed9baf3d9 --- /dev/null +++ b/lib/lwip/include/compat/posix/sys/socket.h @@ -0,0 +1,33 @@ +/** + * @file + * This file is a posix wrapper for lwip/sockets.h. + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "lwip/sockets.h" diff --git a/lib/lwip/include/compat/stdc/errno.h b/lib/lwip/include/compat/stdc/errno.h new file mode 100644 index 0000000000..98a9aec996 --- /dev/null +++ b/lib/lwip/include/compat/stdc/errno.h @@ -0,0 +1,33 @@ +/** + * @file + * This file is a posix/stdc wrapper for lwip/errno.h. + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "lwip/errno.h" diff --git a/lib/lwip/include/lwip/acd.h b/lib/lwip/include/lwip/acd.h new file mode 100644 index 0000000000..e2e6cddfdc --- /dev/null +++ b/lib/lwip/include/lwip/acd.h @@ -0,0 +1,109 @@ +/** + * @file + * + * ACD IPv4 Address Conflict Detection + */ + +/* + * + * Copyright (c) 2007 Dominik Spies kontakt@dspies.de + * Copyright (c) 2018 Jasper Verschueren jasper.verschueren@apart-audio.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Jasper Verschueren jasper.verschueren@apart-audio.com + * Author: Dominik Spies kontakt@dspies.de + */ + +#ifndef LWIP_HDR_ACD_H +#define LWIP_HDR_ACD_H + +#include "lwip/opt.h" + +/* don't build if not configured for use in lwipopts.h */ +#if LWIP_IPV4 && LWIP_ACD + +#include "lwip/netif.h" +#include "lwip/etharp.h" +#include "lwip/prot/acd.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** ACD Timing + * ACD_TMR_INTERVAL msecs, I recommend a value of 100. + * The value must divide 1000 with a remainder almost 0. Possible values are + * 1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 .... + */ +#define ACD_TMR_INTERVAL 100 + +/** + * Callback function: Handle conflict information from ACD module + * + * @param netif network interface to handle conflict information on + * @param state acd_callback_enum_t + */ +typedef void (*acd_conflict_callback_t)(struct netif *netif, acd_callback_enum_t state); + +/** ACD state information per netif */ +struct acd +{ + /** next acd module */ + struct acd *next; + /** the currently selected, probed, announced or used IP-Address */ + ip4_addr_t ipaddr; + /** current ACD state machine state */ + acd_state_enum_t state; + /** sent number of probes or announces, dependent on state */ + u8_t sent_num; + /** ticks to wait, tick is ACD_TMR_INTERVAL long */ + u16_t ttw; + /** ticks until a conflict can again be solved by defending */ + u8_t lastconflict; + /** total number of probed/used IP-Addresses that resulted in a conflict */ + u8_t num_conflicts; + /** callback function -> let's the acd user know if the address is good or + if a conflict is detected */ + acd_conflict_callback_t acd_conflict_callback; +}; + +err_t acd_add(struct netif *netif, struct acd *acd, + acd_conflict_callback_t acd_conflict_callback); +void acd_remove(struct netif *netif, struct acd *acd); +err_t acd_start(struct netif *netif, struct acd *acd, ip4_addr_t ipaddr); +err_t acd_stop(struct acd *acd); +void acd_arp_reply(struct netif *netif, struct etharp_hdr *hdr); +void acd_tmr(void); +void acd_network_changed_link_down(struct netif *netif); +void acd_netif_ip_addr_changed(struct netif *netif, const ip_addr_t *old_addr, + const ip_addr_t *new_addr); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV4 && LWIP_ACD */ + +#endif /* LWIP_HDR_ACD_H */ diff --git a/lib/lwip/include/lwip/altcp.h b/lib/lwip/include/lwip/altcp.h new file mode 100644 index 0000000000..11acaff3c9 --- /dev/null +++ b/lib/lwip/include/lwip/altcp.h @@ -0,0 +1,207 @@ +/** + * @file + * Application layered TCP connection API (to be used from TCPIP thread) + * + * This file contains the generic API. + * For more details see @ref altcp_api. + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ +#ifndef LWIP_HDR_ALTCP_H +#define LWIP_HDR_ALTCP_H + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/tcpbase.h" +#include "lwip/err.h" +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct altcp_pcb; +struct altcp_functions; + +typedef err_t (*altcp_accept_fn)(void *arg, struct altcp_pcb *new_conn, err_t err); +typedef err_t (*altcp_connected_fn)(void *arg, struct altcp_pcb *conn, err_t err); +typedef err_t (*altcp_recv_fn)(void *arg, struct altcp_pcb *conn, struct pbuf *p, err_t err); +typedef err_t (*altcp_sent_fn)(void *arg, struct altcp_pcb *conn, u16_t len); +typedef err_t (*altcp_poll_fn)(void *arg, struct altcp_pcb *conn); +typedef void (*altcp_err_fn)(void *arg, err_t err); + +typedef struct altcp_pcb* (*altcp_new_fn)(void *arg, u8_t ip_type); + +struct altcp_pcb { + const struct altcp_functions *fns; + struct altcp_pcb *inner_conn; + void *arg; + void *state; + /* application callbacks */ + altcp_accept_fn accept; + altcp_connected_fn connected; + altcp_recv_fn recv; + altcp_sent_fn sent; + altcp_poll_fn poll; + altcp_err_fn err; + u8_t pollinterval; +}; + +/** @ingroup altcp + * Struct containing an allocator and its state. */ +typedef struct altcp_allocator_s { + /** Allocator function */ + altcp_new_fn alloc; + /** Argument to allocator function */ + void *arg; +} altcp_allocator_t; + +struct altcp_pcb *altcp_new(altcp_allocator_t *allocator); +struct altcp_pcb *altcp_new_ip6(altcp_allocator_t *allocator); +struct altcp_pcb *altcp_new_ip_type(altcp_allocator_t *allocator, u8_t ip_type); + +void altcp_arg(struct altcp_pcb *conn, void *arg); +void altcp_accept(struct altcp_pcb *conn, altcp_accept_fn accept); +void altcp_recv(struct altcp_pcb *conn, altcp_recv_fn recv); +void altcp_sent(struct altcp_pcb *conn, altcp_sent_fn sent); +void altcp_poll(struct altcp_pcb *conn, altcp_poll_fn poll, u8_t interval); +void altcp_err(struct altcp_pcb *conn, altcp_err_fn err); + +void altcp_recved(struct altcp_pcb *conn, u16_t len); +err_t altcp_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port); +err_t altcp_connect(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected); + +/* return conn for source code compatibility to tcp callback API only */ +struct altcp_pcb *altcp_listen_with_backlog_and_err(struct altcp_pcb *conn, u8_t backlog, err_t *err); +#define altcp_listen_with_backlog(conn, backlog) altcp_listen_with_backlog_and_err(conn, backlog, NULL) +/** @ingroup altcp */ +#define altcp_listen(conn) altcp_listen_with_backlog_and_err(conn, TCP_DEFAULT_LISTEN_BACKLOG, NULL) + +void altcp_abort(struct altcp_pcb *conn); +err_t altcp_close(struct altcp_pcb *conn); +err_t altcp_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx); + +err_t altcp_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags); +err_t altcp_output(struct altcp_pcb *conn); + +u16_t altcp_mss(struct altcp_pcb *conn); +u16_t altcp_sndbuf(struct altcp_pcb *conn); +u16_t altcp_sndqueuelen(struct altcp_pcb *conn); +void altcp_nagle_disable(struct altcp_pcb *conn); +void altcp_nagle_enable(struct altcp_pcb *conn); +int altcp_nagle_disabled(struct altcp_pcb *conn); + +void altcp_setprio(struct altcp_pcb *conn, u8_t prio); + +err_t altcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port); +ip_addr_t *altcp_get_ip(struct altcp_pcb *conn, int local); +u16_t altcp_get_port(struct altcp_pcb *conn, int local); + +#if LWIP_TCP_KEEPALIVE +void altcp_keepalive_disable(struct altcp_pcb *conn); +void altcp_keepalive_enable(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t count); +#endif + +#ifdef LWIP_DEBUG +enum tcp_state altcp_dbg_get_tcp_state(struct altcp_pcb *conn); +#endif + +#ifdef __cplusplus +} +#endif + +#else /* LWIP_ALTCP */ + +/* ALTCP disabled, define everything to link against tcp callback API (e.g. to get a small non-ssl httpd) */ + +#include "lwip/tcp.h" + +#define altcp_accept_fn tcp_accept_fn +#define altcp_connected_fn tcp_connected_fn +#define altcp_recv_fn tcp_recv_fn +#define altcp_sent_fn tcp_sent_fn +#define altcp_poll_fn tcp_poll_fn +#define altcp_err_fn tcp_err_fn + +#define altcp_pcb tcp_pcb +#define altcp_tcp_new_ip_type tcp_new_ip_type +#define altcp_tcp_new tcp_new +#define altcp_tcp_new_ip6 tcp_new_ip6 + +#define altcp_new(allocator) tcp_new() +#define altcp_new_ip6(allocator) tcp_new_ip6() +#define altcp_new_ip_type(allocator, ip_type) tcp_new_ip_type(ip_type) + +#define altcp_arg tcp_arg +#define altcp_accept tcp_accept +#define altcp_recv tcp_recv +#define altcp_sent tcp_sent +#define altcp_poll tcp_poll +#define altcp_err tcp_err + +#define altcp_recved tcp_recved +#define altcp_bind tcp_bind +#define altcp_connect tcp_connect + +#define altcp_listen_with_backlog_and_err tcp_listen_with_backlog_and_err +#define altcp_listen_with_backlog tcp_listen_with_backlog +#define altcp_listen tcp_listen + +#define altcp_abort tcp_abort +#define altcp_close tcp_close +#define altcp_shutdown tcp_shutdown + +#define altcp_write tcp_write +#define altcp_output tcp_output + +#define altcp_mss tcp_mss +#define altcp_sndbuf tcp_sndbuf +#define altcp_sndqueuelen tcp_sndqueuelen +#define altcp_nagle_disable tcp_nagle_disable +#define altcp_nagle_enable tcp_nagle_enable +#define altcp_nagle_disabled tcp_nagle_disabled +#define altcp_setprio tcp_setprio + +#define altcp_get_tcp_addrinfo tcp_get_tcp_addrinfo +#define altcp_get_ip(pcb, local) ((local) ? (&(pcb)->local_ip) : (&(pcb)->remote_ip)) + +#ifdef LWIP_DEBUG +#define altcp_dbg_get_tcp_state tcp_dbg_get_tcp_state +#endif + +#endif /* LWIP_ALTCP */ + +#endif /* LWIP_HDR_ALTCP_H */ diff --git a/lib/lwip/include/lwip/altcp_tcp.h b/lib/lwip/include/lwip/altcp_tcp.h new file mode 100644 index 0000000000..ca473796b0 --- /dev/null +++ b/lib/lwip/include/lwip/altcp_tcp.h @@ -0,0 +1,72 @@ +/** + * @file + * Application layered TCP connection API (to be used from TCPIP thread)<br> + * This interface mimics the tcp callback API to the application while preventing + * direct linking (much like virtual functions). + * This way, an application can make use of other application layer protocols + * on top of TCP without knowing the details (e.g. TLS, proxy connection). + * + * This file contains the base implementation calling into tcp. + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ +#ifndef LWIP_HDR_ALTCP_TCP_H +#define LWIP_HDR_ALTCP_TCP_H + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/altcp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct altcp_pcb *altcp_tcp_new_ip_type(u8_t ip_type); + +#define altcp_tcp_new() altcp_tcp_new_ip_type(IPADDR_TYPE_V4) +#define altcp_tcp_new_ip6() altcp_tcp_new_ip_type(IPADDR_TYPE_V6) + +struct altcp_pcb *altcp_tcp_alloc(void *arg, u8_t ip_type); + +struct tcp_pcb; +struct altcp_pcb *altcp_tcp_wrap(struct tcp_pcb *tpcb); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_ALTCP */ + +#endif /* LWIP_HDR_ALTCP_TCP_H */ diff --git a/lib/lwip/include/lwip/altcp_tls.h b/lib/lwip/include/lwip/altcp_tls.h new file mode 100644 index 0000000000..fcb784d89d --- /dev/null +++ b/lib/lwip/include/lwip/altcp_tls.h @@ -0,0 +1,196 @@ +/** + * @file + * Application layered TCP/TLS connection API (to be used from TCPIP thread) + * + * @defgroup altcp_tls TLS layer + * @ingroup altcp + * This file contains function prototypes for a TLS layer. + * A port to ARM mbedtls is provided in the apps/ tree + * (LWIP_ALTCP_TLS_MBEDTLS option). + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ +#ifndef LWIP_HDR_ALTCP_TLS_H +#define LWIP_HDR_ALTCP_TLS_H + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +#if LWIP_ALTCP_TLS + +#include "lwip/altcp.h" + +/* check if mbedtls port is enabled */ +#include "lwip/apps/altcp_tls_mbedtls_opts.h" +/* allow session structure to be fully defined when using mbedtls port */ +#if LWIP_ALTCP_TLS_MBEDTLS +#include "mbedtls/ssl.h" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/** @ingroup altcp_tls + * ALTCP_TLS configuration handle, content depends on port (e.g. mbedtls) + */ +struct altcp_tls_config; + +/** @ingroup altcp_tls + * Create an ALTCP_TLS server configuration handle prepared for multiple certificates + */ +struct altcp_tls_config *altcp_tls_create_config_server(u8_t cert_count); + +/** @ingroup altcp_tls + * Add a certificate to an ALTCP_TLS server configuration handle + */ +err_t altcp_tls_config_server_add_privkey_cert(struct altcp_tls_config *config, + const u8_t *privkey, size_t privkey_len, + const u8_t *privkey_pass, size_t privkey_pass_len, + const u8_t *cert, size_t cert_len); + +/** @ingroup altcp_tls + * Create an ALTCP_TLS server configuration handle with one certificate + * (short version of calling @ref altcp_tls_create_config_server and + * @ref altcp_tls_config_server_add_privkey_cert) + */ +struct altcp_tls_config *altcp_tls_create_config_server_privkey_cert(const u8_t *privkey, size_t privkey_len, + const u8_t *privkey_pass, size_t privkey_pass_len, + const u8_t *cert, size_t cert_len); + +/** @ingroup altcp_tls + * Create an ALTCP_TLS client configuration handle + */ +struct altcp_tls_config *altcp_tls_create_config_client(const u8_t *cert, size_t cert_len); + +/** @ingroup altcp_tls + * Create an ALTCP_TLS client configuration handle with two-way server/client authentication + */ +struct altcp_tls_config *altcp_tls_create_config_client_2wayauth(const u8_t *ca, size_t ca_len, const u8_t *privkey, size_t privkey_len, + const u8_t *privkey_pass, size_t privkey_pass_len, + const u8_t *cert, size_t cert_len); + +/** @ingroup altcp_tls + * Configure ALPN TLS extension + * Example:<br> + * static const char *g_alpn_protocols[] = { "x-amzn-mqtt-ca", NULL };<br> + * tls_config = altcp_tls_create_config_client(ca, ca_len);<br> + * altcp_tls_conf_alpn_protocols(tls_config, g_alpn_protocols);<br> + */ +int altcp_tls_configure_alpn_protocols(struct altcp_tls_config *conf, const char **protos); + +/** @ingroup altcp_tls + * Free an ALTCP_TLS configuration handle + */ +void altcp_tls_free_config(struct altcp_tls_config *conf); + +/** @ingroup altcp_tls + * Free an ALTCP_TLS global entropy instance. + * All ALTCP_TLS configuration are linked to one altcp_tls_entropy_rng structure + * that handle an unique system entropy & ctr_drbg instance. + * This function allow application to free this altcp_tls_entropy_rng structure + * when all configuration referencing it were destroyed. + * This function does nothing if some ALTCP_TLS configuration handle are still + * active. + */ +void altcp_tls_free_entropy(void); + +/** @ingroup altcp_tls + * Create new ALTCP_TLS layer wrapping an existing pcb as inner connection (e.g. TLS over TCP) + */ +struct altcp_pcb *altcp_tls_wrap(struct altcp_tls_config *config, struct altcp_pcb *inner_pcb); + +/** @ingroup altcp_tls + * Create new ALTCP_TLS pcb and its inner tcp pcb + */ +struct altcp_pcb *altcp_tls_new(struct altcp_tls_config *config, u8_t ip_type); + +/** @ingroup altcp_tls + * Create new ALTCP_TLS layer pcb and its inner tcp pcb. + * Same as @ref altcp_tls_new but this allocator function fits to + * @ref altcp_allocator_t / @ref altcp_new.<br> + 'arg' must contain a struct altcp_tls_config *. + */ +struct altcp_pcb *altcp_tls_alloc(void *arg, u8_t ip_type); + +/** @ingroup altcp_tls + * Return pointer to internal TLS context so application can tweak it. + * Real type depends on port (e.g. mbedtls) + */ +void *altcp_tls_context(struct altcp_pcb *conn); + +/** @ingroup altcp_tls + * ALTCP_TLS session handle, content depends on port (e.g. mbedtls) + */ +struct altcp_tls_session +#if LWIP_ALTCP_TLS_MBEDTLS +{ + mbedtls_ssl_session data; +} +#endif +; + +/** @ingroup altcp_tls + * Initialise a TLS session buffer. + * Real type depends on port (e.g. mbedtls use mbedtls_ssl_session) + */ +void altcp_tls_init_session(struct altcp_tls_session *dest); + +/** @ingroup altcp_tls + * Save current connected session to reuse it later. Should be called after altcp_connect() succeeded. + * Return error if saving session fail. + * Real type depends on port (e.g. mbedtls use mbedtls_ssl_session) + */ +err_t altcp_tls_get_session(struct altcp_pcb *conn, struct altcp_tls_session *dest); + +/** @ingroup altcp_tls + * Restore a previously saved session. Must be called before altcp_connect(). + * Return error if cannot restore session. + * Real type depends on port (e.g. mbedtls use mbedtls_ssl_session) + */ +err_t altcp_tls_set_session(struct altcp_pcb *conn, struct altcp_tls_session *from); + +/** @ingroup altcp_tls + * Free allocated data inside a TLS session buffer. + * Real type depends on port (e.g. mbedtls use mbedtls_ssl_session) + */ +void altcp_tls_free_session(struct altcp_tls_session *dest); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_ALTCP_TLS */ +#endif /* LWIP_ALTCP */ +#endif /* LWIP_HDR_ALTCP_TLS_H */ diff --git a/lib/lwip/include/lwip/api.h b/lib/lwip/include/lwip/api.h new file mode 100644 index 0000000000..be8c22aabf --- /dev/null +++ b/lib/lwip/include/lwip/api.h @@ -0,0 +1,434 @@ +/** + * @file + * netconn API (to be used from non-TCPIP threads) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_API_H +#define LWIP_HDR_API_H + +#include "lwip/opt.h" + +#if LWIP_NETCONN || LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ +/* Note: Netconn API is always available when sockets are enabled - + * sockets are implemented on top of them */ + +#include "lwip/arch.h" +#include "lwip/netbuf.h" +#include "lwip/sys.h" +#include "lwip/ip_addr.h" +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Throughout this file, IP addresses and port numbers are expected to be in + * the same byte order as in the corresponding pcb. + */ + +/* Flags for netconn_write (u8_t) */ +#define NETCONN_NOFLAG 0x00 +#define NETCONN_NOCOPY 0x00 /* Only for source code compatibility */ +#define NETCONN_COPY 0x01 +#define NETCONN_MORE 0x02 +#define NETCONN_DONTBLOCK 0x04 +#define NETCONN_NOAUTORCVD 0x08 /* prevent netconn_recv_data_tcp() from updating the tcp window - must be done manually via netconn_tcp_recvd() */ +#define NETCONN_NOFIN 0x10 /* upper layer already received data, leave FIN in queue until called again */ + +/* Flags for struct netconn.flags (u8_t) */ +/** This netconn had an error, don't block on recvmbox/acceptmbox any more */ +#define NETCONN_FLAG_MBOXCLOSED 0x01 +/** Should this netconn avoid blocking? */ +#define NETCONN_FLAG_NON_BLOCKING 0x02 +/** Was the last connect action a non-blocking one? */ +#define NETCONN_FLAG_IN_NONBLOCKING_CONNECT 0x04 +#if LWIP_NETCONN_FULLDUPLEX + /** The mbox of this netconn is being deallocated, don't use it anymore */ +#define NETCONN_FLAG_MBOXINVALID 0x08 +#endif /* LWIP_NETCONN_FULLDUPLEX */ +/** If a nonblocking write has been rejected before, poll_tcp needs to + check if the netconn is writable again */ +#define NETCONN_FLAG_CHECK_WRITESPACE 0x10 +#if LWIP_IPV6 +/** If this flag is set then only IPv6 communication is allowed on the + netconn. As per RFC#3493 this features defaults to OFF allowing + dual-stack usage by default. */ +#define NETCONN_FLAG_IPV6_V6ONLY 0x20 +#endif /* LWIP_IPV6 */ +#if LWIP_NETBUF_RECVINFO +/** Received packet info will be recorded for this netconn */ +#define NETCONN_FLAG_PKTINFO 0x40 +#endif /* LWIP_NETBUF_RECVINFO */ +/** A FIN has been received but not passed to the application yet */ +#define NETCONN_FIN_RX_PENDING 0x80 + +/* Helpers to process several netconn_types by the same code */ +#define NETCONNTYPE_GROUP(t) ((t)&0xF0) +#define NETCONNTYPE_DATAGRAM(t) ((t)&0xE0) +#if LWIP_IPV6 +#define NETCONN_TYPE_IPV6 0x08 +#define NETCONNTYPE_ISIPV6(t) (((t)&NETCONN_TYPE_IPV6) != 0) +#define NETCONNTYPE_ISUDPLITE(t) (((t)&0xF3) == NETCONN_UDPLITE) +#define NETCONNTYPE_ISUDPNOCHKSUM(t) (((t)&0xF3) == NETCONN_UDPNOCHKSUM) +#else /* LWIP_IPV6 */ +#define NETCONNTYPE_ISIPV6(t) (0) +#define NETCONNTYPE_ISUDPLITE(t) ((t) == NETCONN_UDPLITE) +#define NETCONNTYPE_ISUDPNOCHKSUM(t) ((t) == NETCONN_UDPNOCHKSUM) +#endif /* LWIP_IPV6 */ + +/** @ingroup netconn_common + * Protocol family and type of the netconn + */ +enum netconn_type { + NETCONN_INVALID = 0, + /** TCP IPv4 */ + NETCONN_TCP = 0x10, +#if LWIP_IPV6 + /** TCP IPv6 */ + NETCONN_TCP_IPV6 = NETCONN_TCP | NETCONN_TYPE_IPV6 /* 0x18 */, +#endif /* LWIP_IPV6 */ + /** UDP IPv4 */ + NETCONN_UDP = 0x20, + /** UDP IPv4 lite */ + NETCONN_UDPLITE = 0x21, + /** UDP IPv4 no checksum */ + NETCONN_UDPNOCHKSUM = 0x22, + +#if LWIP_IPV6 + /** UDP IPv6 (dual-stack by default, unless you call @ref netconn_set_ipv6only) */ + NETCONN_UDP_IPV6 = NETCONN_UDP | NETCONN_TYPE_IPV6 /* 0x28 */, + /** UDP IPv6 lite (dual-stack by default, unless you call @ref netconn_set_ipv6only) */ + NETCONN_UDPLITE_IPV6 = NETCONN_UDPLITE | NETCONN_TYPE_IPV6 /* 0x29 */, + /** UDP IPv6 no checksum (dual-stack by default, unless you call @ref netconn_set_ipv6only) */ + NETCONN_UDPNOCHKSUM_IPV6 = NETCONN_UDPNOCHKSUM | NETCONN_TYPE_IPV6 /* 0x2a */, +#endif /* LWIP_IPV6 */ + + /** Raw connection IPv4 */ + NETCONN_RAW = 0x40 +#if LWIP_IPV6 + /** Raw connection IPv6 (dual-stack by default, unless you call @ref netconn_set_ipv6only) */ + , NETCONN_RAW_IPV6 = NETCONN_RAW | NETCONN_TYPE_IPV6 /* 0x48 */ +#endif /* LWIP_IPV6 */ +}; + +/** Current state of the netconn. Non-TCP netconns are always + * in state NETCONN_NONE! */ +enum netconn_state { + NETCONN_NONE, + NETCONN_WRITE, + NETCONN_LISTEN, + NETCONN_CONNECT, + NETCONN_CLOSE +}; + +/** Used to inform the callback function about changes + * + * Event explanation: + * + * In the netconn implementation, there are three ways to block a client: + * + * - accept mbox (sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, 0); in netconn_accept()) + * - receive mbox (sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0); in netconn_recv_data()) + * - send queue is full (sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); in lwip_netconn_do_write()) + * + * The events have to be seen as events signaling the state of these mboxes/semaphores. For non-blocking + * connections, you need to know in advance whether a call to a netconn function call would block or not, + * and these events tell you about that. + * + * RCVPLUS events say: Safe to perform a potentially blocking call call once more. + * They are counted in sockets - three RCVPLUS events for accept mbox means you are safe + * to call netconn_accept 3 times without being blocked. + * Same thing for receive mbox. + * + * RCVMINUS events say: Your call to to a possibly blocking function is "acknowledged". + * Socket implementation decrements the counter. + * + * For TX, there is no need to count, its merely a flag. SENDPLUS means you may send something. + * SENDPLUS occurs when enough data was delivered to peer so netconn_send() can be called again. + * A SENDMINUS event occurs when the next call to a netconn_send() would be blocking. + */ +enum netconn_evt { + NETCONN_EVT_RCVPLUS, + NETCONN_EVT_RCVMINUS, + NETCONN_EVT_SENDPLUS, + NETCONN_EVT_SENDMINUS, + NETCONN_EVT_ERROR +}; + +#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) +/** Used for netconn_join_leave_group() */ +enum netconn_igmp { + NETCONN_JOIN, + NETCONN_LEAVE +}; +#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */ + +#if LWIP_DNS +/* Used for netconn_gethostbyname_addrtype(), these should match the DNS_ADDRTYPE defines in dns.h */ +#define NETCONN_DNS_DEFAULT NETCONN_DNS_IPV4_IPV6 +#define NETCONN_DNS_IPV4 0 +#define NETCONN_DNS_IPV6 1 +#define NETCONN_DNS_IPV4_IPV6 2 /* try to resolve IPv4 first, try IPv6 if IPv4 fails only */ +#define NETCONN_DNS_IPV6_IPV4 3 /* try to resolve IPv6 first, try IPv4 if IPv6 fails only */ +#endif /* LWIP_DNS */ + +/* forward-declare some structs to avoid to include their headers */ +struct ip_pcb; +struct tcp_pcb; +struct udp_pcb; +struct raw_pcb; +struct netconn; +struct api_msg; + +/** A callback prototype to inform about events for a netconn */ +typedef void (* netconn_callback)(struct netconn *, enum netconn_evt, u16_t len); + +/** A netconn descriptor */ +struct netconn { + /** type of the netconn (TCP, UDP or RAW) */ + enum netconn_type type; + /** current state of the netconn */ + enum netconn_state state; + /** the lwIP internal protocol control block */ + union { + struct ip_pcb *ip; + struct tcp_pcb *tcp; + struct udp_pcb *udp; + struct raw_pcb *raw; + } pcb; + /** the last asynchronous unreported error this netconn had */ + err_t pending_err; +#if !LWIP_NETCONN_SEM_PER_THREAD + /** sem that is used to synchronously execute functions in the core context */ + sys_sem_t op_completed; +#endif + /** mbox where received packets are stored until they are fetched + by the netconn application thread (can grow quite big) */ + sys_mbox_t recvmbox; +#if LWIP_TCP + /** mbox where new connections are stored until processed + by the application thread */ + sys_mbox_t acceptmbox; +#endif /* LWIP_TCP */ +#if LWIP_NETCONN_FULLDUPLEX + /** number of threads waiting on an mbox. This is required to unblock + all threads when closing while threads are waiting. */ + int mbox_threads_waiting; +#endif + union { + int socket; + void *ptr; + } callback_arg; +#if LWIP_SO_SNDTIMEO + /** timeout to wait for sending data (which means enqueueing data for sending + in internal buffers) in milliseconds */ + s32_t send_timeout; +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVTIMEO + /** timeout in milliseconds to wait for new data to be received + (or connections to arrive for listening netconns) */ + u32_t recv_timeout; +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF + /** maximum amount of bytes queued in recvmbox + not used for TCP: adjust TCP_WND instead! */ + int recv_bufsize; + /** number of bytes currently in recvmbox to be received, + tested against recv_bufsize to limit bytes on recvmbox + for UDP and RAW, used for FIONREAD */ + int recv_avail; +#endif /* LWIP_SO_RCVBUF */ +#if LWIP_SO_LINGER + /** values <0 mean linger is disabled, values > 0 are seconds to linger */ + s16_t linger; +#endif /* LWIP_SO_LINGER */ + /** flags holding more netconn-internal state, see NETCONN_FLAG_* defines */ + u8_t flags; +#if LWIP_TCP + /** TCP: when data passed to netconn_write doesn't fit into the send buffer, + this temporarily stores the message. + Also used during connect and close. */ + struct api_msg *current_msg; +#endif /* LWIP_TCP */ + /** A callback function that is informed about events for this netconn */ + netconn_callback callback; +}; + +/** This vector type is passed to @ref netconn_write_vectors_partly to send + * multiple buffers at once. + * ATTENTION: This type has to directly map struct iovec since one is casted + * into the other! + */ +struct netvector { + /** pointer to the application buffer that contains the data to send */ + const void *ptr; + /** size of the application data to send */ + size_t len; +}; + +/** Register an Network connection event */ +#define API_EVENT(c,e,l) if (c->callback) { \ + (*c->callback)(c, e, l); \ + } + +/* Network connection functions: */ + +/** @ingroup netconn_common + * Create new netconn connection + * @param t @ref netconn_type */ +#define netconn_new(t) netconn_new_with_proto_and_callback(t, 0, NULL) +#define netconn_new_with_callback(t, c) netconn_new_with_proto_and_callback(t, 0, c) +struct netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto, + netconn_callback callback); +err_t netconn_prepare_delete(struct netconn *conn); +err_t netconn_delete(struct netconn *conn); +/** Get the type of a netconn (as enum netconn_type). */ +#define netconn_type(conn) (conn->type) + +err_t netconn_getaddr(struct netconn *conn, ip_addr_t *addr, + u16_t *port, u8_t local); +/** @ingroup netconn_common */ +#define netconn_peer(c,i,p) netconn_getaddr(c,i,p,0) +/** @ingroup netconn_common */ +#define netconn_addr(c,i,p) netconn_getaddr(c,i,p,1) + +err_t netconn_bind(struct netconn *conn, const ip_addr_t *addr, u16_t port); +err_t netconn_bind_if(struct netconn *conn, u8_t if_idx); +err_t netconn_connect(struct netconn *conn, const ip_addr_t *addr, u16_t port); +err_t netconn_disconnect (struct netconn *conn); +err_t netconn_listen_with_backlog(struct netconn *conn, u8_t backlog); +/** @ingroup netconn_tcp */ +#define netconn_listen(conn) netconn_listen_with_backlog(conn, TCP_DEFAULT_LISTEN_BACKLOG) +err_t netconn_accept(struct netconn *conn, struct netconn **new_conn); +err_t netconn_recv(struct netconn *conn, struct netbuf **new_buf); +err_t netconn_recv_udp_raw_netbuf(struct netconn *conn, struct netbuf **new_buf); +err_t netconn_recv_udp_raw_netbuf_flags(struct netconn *conn, struct netbuf **new_buf, u8_t apiflags); +err_t netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf); +err_t netconn_recv_tcp_pbuf_flags(struct netconn *conn, struct pbuf **new_buf, u8_t apiflags); +err_t netconn_tcp_recvd(struct netconn *conn, size_t len); +err_t netconn_sendto(struct netconn *conn, struct netbuf *buf, + const ip_addr_t *addr, u16_t port); +err_t netconn_send(struct netconn *conn, struct netbuf *buf); +err_t netconn_write_partly(struct netconn *conn, const void *dataptr, size_t size, + u8_t apiflags, size_t *bytes_written); +err_t netconn_write_vectors_partly(struct netconn *conn, struct netvector *vectors, u16_t vectorcnt, + u8_t apiflags, size_t *bytes_written); +/** @ingroup netconn_tcp */ +#define netconn_write(conn, dataptr, size, apiflags) \ + netconn_write_partly(conn, dataptr, size, apiflags, NULL) +err_t netconn_close(struct netconn *conn); +err_t netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx); + +#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) +err_t netconn_join_leave_group(struct netconn *conn, const ip_addr_t *multiaddr, + const ip_addr_t *netif_addr, enum netconn_igmp join_or_leave); +err_t netconn_join_leave_group_netif(struct netconn *conn, const ip_addr_t *multiaddr, + u8_t if_idx, enum netconn_igmp join_or_leave); +#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */ +#if LWIP_DNS +#if LWIP_IPV4 && LWIP_IPV6 +err_t netconn_gethostbyname_addrtype(const char *name, ip_addr_t *addr, u8_t dns_addrtype); +#define netconn_gethostbyname(name, addr) netconn_gethostbyname_addrtype(name, addr, NETCONN_DNS_DEFAULT) +#else /* LWIP_IPV4 && LWIP_IPV6 */ +err_t netconn_gethostbyname(const char *name, ip_addr_t *addr); +#define netconn_gethostbyname_addrtype(name, addr, dns_addrtype) netconn_gethostbyname(name, addr) +#endif /* LWIP_IPV4 && LWIP_IPV6 */ +#endif /* LWIP_DNS */ + +err_t netconn_err(struct netconn *conn); +#define netconn_recv_bufsize(conn) ((conn)->recv_bufsize) + +#define netconn_set_flags(conn, set_flags) do { (conn)->flags = (u8_t)((conn)->flags | (set_flags)); } while(0) +#define netconn_clear_flags(conn, clr_flags) do { (conn)->flags = (u8_t)((conn)->flags & (u8_t)(~(clr_flags) & 0xff)); } while(0) +#define netconn_is_flag_set(conn, flag) (((conn)->flags & (flag)) != 0) + +#define netconn_set_callback_arg(conn, arg) do { (conn)->callback_arg.ptr = (arg); } while(0) +#define netconn_get_callback_arg(conn) ((conn)->callback_arg.ptr) + +/** Set the blocking status of netconn calls (@todo: write/send is missing) */ +#define netconn_set_nonblocking(conn, val) do { if(val) { \ + netconn_set_flags(conn, NETCONN_FLAG_NON_BLOCKING); \ +} else { \ + netconn_clear_flags(conn, NETCONN_FLAG_NON_BLOCKING); }} while(0) +/** Get the blocking status of netconn calls (@todo: write/send is missing) */ +#define netconn_is_nonblocking(conn) (((conn)->flags & NETCONN_FLAG_NON_BLOCKING) != 0) + +#if LWIP_IPV6 +/** @ingroup netconn_common + * TCP: Set the IPv6 ONLY status of netconn calls (see NETCONN_FLAG_IPV6_V6ONLY) + */ +#define netconn_set_ipv6only(conn, val) do { if(val) { \ + netconn_set_flags(conn, NETCONN_FLAG_IPV6_V6ONLY); \ +} else { \ + netconn_clear_flags(conn, NETCONN_FLAG_IPV6_V6ONLY); }} while(0) +/** @ingroup netconn_common + * TCP: Get the IPv6 ONLY status of netconn calls (see NETCONN_FLAG_IPV6_V6ONLY) + */ +#define netconn_get_ipv6only(conn) (((conn)->flags & NETCONN_FLAG_IPV6_V6ONLY) != 0) +#endif /* LWIP_IPV6 */ + +#if LWIP_SO_SNDTIMEO +/** Set the send timeout in milliseconds */ +#define netconn_set_sendtimeout(conn, timeout) ((conn)->send_timeout = (timeout)) +/** Get the send timeout in milliseconds */ +#define netconn_get_sendtimeout(conn) ((conn)->send_timeout) +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_RCVTIMEO +/** Set the receive timeout in milliseconds */ +#define netconn_set_recvtimeout(conn, timeout) ((conn)->recv_timeout = (timeout)) +/** Get the receive timeout in milliseconds */ +#define netconn_get_recvtimeout(conn) ((conn)->recv_timeout) +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF +/** Set the receive buffer in bytes */ +#define netconn_set_recvbufsize(conn, recvbufsize) ((conn)->recv_bufsize = (recvbufsize)) +/** Get the receive buffer in bytes */ +#define netconn_get_recvbufsize(conn) ((conn)->recv_bufsize) +#endif /* LWIP_SO_RCVBUF*/ + +#if LWIP_NETCONN_SEM_PER_THREAD +void netconn_thread_init(void); +void netconn_thread_cleanup(void); +#else /* LWIP_NETCONN_SEM_PER_THREAD */ +#define netconn_thread_init() +#define netconn_thread_cleanup() +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_NETCONN || LWIP_SOCKET */ + +#endif /* LWIP_HDR_API_H */ diff --git a/lib/lwip/include/lwip/apps/FILES b/lib/lwip/include/lwip/apps/FILES new file mode 100644 index 0000000000..adfc0f3345 --- /dev/null +++ b/lib/lwip/include/lwip/apps/FILES @@ -0,0 +1,2 @@ +This directory contains application headers. +Every application shall provide one api file APP.h and optionally one options file APP_opts.h diff --git a/lib/lwip/include/lwip/apps/altcp_proxyconnect.h b/lib/lwip/include/lwip/apps/altcp_proxyconnect.h new file mode 100644 index 0000000000..65d31279de --- /dev/null +++ b/lib/lwip/include/lwip/apps/altcp_proxyconnect.h @@ -0,0 +1,79 @@ +/** + * @file + * Application layered TCP connection API that executes a proxy-connect. + * + * This file provides a starting layer that executes a proxy-connect e.g. to + * set up TLS connections through a http proxy. + */ + +/* + * Copyright (c) 2018 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ + +#ifndef LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H +#define LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/ip_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct altcp_proxyconnect_config { + ip_addr_t proxy_addr; + u16_t proxy_port; +}; + + +struct altcp_pcb *altcp_proxyconnect_new(struct altcp_proxyconnect_config *config, struct altcp_pcb *inner_pcb); +struct altcp_pcb *altcp_proxyconnect_new_tcp(struct altcp_proxyconnect_config *config, u8_t ip_type); + +struct altcp_pcb *altcp_proxyconnect_alloc(void *arg, u8_t ip_type); + +#if LWIP_ALTCP_TLS +struct altcp_proxyconnect_tls_config { + struct altcp_proxyconnect_config proxy; + struct altcp_tls_config *tls_config; +}; + +struct altcp_pcb *altcp_proxyconnect_tls_alloc(void *arg, u8_t ip_type); +#endif /* LWIP_ALTCP_TLS */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_ALTCP */ +#endif /* LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H */ diff --git a/lib/lwip/include/lwip/apps/altcp_tls_mbedtls_opts.h b/lib/lwip/include/lwip/apps/altcp_tls_mbedtls_opts.h new file mode 100644 index 0000000000..e41301c061 --- /dev/null +++ b/lib/lwip/include/lwip/apps/altcp_tls_mbedtls_opts.h @@ -0,0 +1,111 @@ +/** + * @file + * Application layered TCP/TLS connection API (to be used from TCPIP thread) + * + * This file contains options for an mbedtls port of the TLS layer. + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ +#ifndef LWIP_HDR_ALTCP_TLS_OPTS_H +#define LWIP_HDR_ALTCP_TLS_OPTS_H + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +/** LWIP_ALTCP_TLS_MBEDTLS==1: use mbedTLS for TLS support for altcp API + * mbedtls include directory must be reachable via include search path + */ +#ifndef LWIP_ALTCP_TLS_MBEDTLS +#define LWIP_ALTCP_TLS_MBEDTLS 0 +#endif + +/** Configure debug level of this file */ +#ifndef ALTCP_MBEDTLS_DEBUG +#define ALTCP_MBEDTLS_DEBUG LWIP_DBG_OFF +#endif + +/** Configure lwIP debug level of the mbedTLS library */ +#ifndef ALTCP_MBEDTLS_LIB_DEBUG +#define ALTCP_MBEDTLS_LIB_DEBUG LWIP_DBG_OFF +#endif + +/** Configure minimum internal debug level of the mbedTLS library */ +#ifndef ALTCP_MBEDTLS_LIB_DEBUG_LEVEL_MIN +#define ALTCP_MBEDTLS_LIB_DEBUG_LEVEL_MIN 0 +#endif + +/** Enable the basic session cache + * ATTENTION: Using a session cache can lower security by reusing keys! + */ +#ifndef ALTCP_MBEDTLS_USE_SESSION_CACHE +#define ALTCP_MBEDTLS_USE_SESSION_CACHE 0 +#endif + +/** Maximum cache size of the basic session cache */ +#ifndef ALTCP_MBEDTLS_SESSION_CACHE_SIZE +#define ALTCP_MBEDTLS_SESSION_CACHE_SIZE 30 +#endif + +/** Set a session timeout in seconds for the basic session cache */ +#ifndef ALTCP_MBEDTLS_SESSION_CACHE_TIMEOUT_SECONDS +#define ALTCP_MBEDTLS_SESSION_CACHE_TIMEOUT_SECONDS (60 * 60) +#endif + +/** Use session tickets to speed up connection setup (needs + * MBEDTLS_SSL_SESSION_TICKETS enabled in mbedTLS config). + * ATTENTION: Using session tickets can lower security by reusing keys! + */ +#ifndef ALTCP_MBEDTLS_USE_SESSION_TICKETS +#define ALTCP_MBEDTLS_USE_SESSION_TICKETS 0 +#endif + +/** Session ticket cipher */ +#ifndef ALTCP_MBEDTLS_SESSION_TICKET_CIPHER +#define ALTCP_MBEDTLS_SESSION_TICKET_CIPHER MBEDTLS_CIPHER_AES_256_GCM +#endif + +/** Maximum timeout for session tickets */ +#ifndef ALTCP_MBEDTLS_SESSION_TICKET_TIMEOUT_SECONDS +#define ALTCP_MBEDTLS_SESSION_TICKET_TIMEOUT_SECONDS (60 * 60 * 24) +#endif + +/** Certificate verification mode: MBEDTLS_SSL_VERIFY_NONE, MBEDTLS_SSL_VERIFY_OPTIONAL (default), + * MBEDTLS_SSL_VERIFY_REQUIRED (recommended)*/ +#ifndef ALTCP_MBEDTLS_AUTHMODE +#define ALTCP_MBEDTLS_AUTHMODE MBEDTLS_SSL_VERIFY_OPTIONAL +#endif + +#endif /* LWIP_ALTCP */ + +#endif /* LWIP_HDR_ALTCP_TLS_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/fs.h b/lib/lwip/include/lwip/apps/fs.h new file mode 100644 index 0000000000..82b219a970 --- /dev/null +++ b/lib/lwip/include/lwip/apps/fs.h @@ -0,0 +1,139 @@ +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_APPS_FS_H +#define LWIP_HDR_APPS_FS_H + +#include "httpd_opts.h" +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define FS_READ_EOF -1 +#define FS_READ_DELAYED -2 + +#if HTTPD_PRECALCULATED_CHECKSUM +struct fsdata_chksum { + u32_t offset; + u16_t chksum; + u16_t len; +}; +#endif /* HTTPD_PRECALCULATED_CHECKSUM */ + +#define FS_FILE_FLAGS_HEADER_INCLUDED 0x01 +#define FS_FILE_FLAGS_HEADER_PERSISTENT 0x02 +#define FS_FILE_FLAGS_HEADER_HTTPVER_1_1 0x04 +#define FS_FILE_FLAGS_SSI 0x08 +#define FS_FILE_FLAGS_CUSTOM 0x10 + +/** Define FS_FILE_EXTENSION_T_DEFINED if you have typedef'ed to your private + * pointer type (defaults to 'void' so the default usage is 'void*') + */ +#ifndef FS_FILE_EXTENSION_T_DEFINED +typedef void fs_file_extension; +#endif + +struct fs_file { + const char *data; + int len; + int index; +#if LWIP_HTTPD_FILE_EXTENSION + /* pextension is free for implementations to hold private (extensional) + arbitrary data, e.g. holding some file state or file system handle */ + fs_file_extension *pextension; +#endif /* LWIP_HTTPD_FILE_EXTENSION */ +#if HTTPD_PRECALCULATED_CHECKSUM + const struct fsdata_chksum *chksum; + u16_t chksum_count; +#endif /* HTTPD_PRECALCULATED_CHECKSUM */ + u8_t flags; +#if LWIP_HTTPD_FILE_STATE + void *state; +#endif /* LWIP_HTTPD_FILE_STATE */ +}; + +#if LWIP_HTTPD_FS_ASYNC_READ +typedef void (*fs_wait_cb)(void *arg); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ + +err_t fs_open(struct fs_file *file, const char *name); +void fs_close(struct fs_file *file); +#if LWIP_HTTPD_DYNAMIC_FILE_READ +#if LWIP_HTTPD_FS_ASYNC_READ +int fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg); +#else /* LWIP_HTTPD_FS_ASYNC_READ */ +int fs_read(struct fs_file *file, char *buffer, int count); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ +#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */ +#if LWIP_HTTPD_FS_ASYNC_READ +int fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ +int fs_bytes_left(struct fs_file *file); + +#if LWIP_HTTPD_FILE_STATE +/** This user-defined function is called when a file is opened. */ +void *fs_state_init(struct fs_file *file, const char *name); +/** This user-defined function is called when a file is closed. */ +void fs_state_free(struct fs_file *file, void *state); +#endif /* #if LWIP_HTTPD_FILE_STATE */ + +struct fsdata_file { + const struct fsdata_file *next; + const unsigned char *name; + const unsigned char *data; + int len; + u8_t flags; +#if HTTPD_PRECALCULATED_CHECKSUM + u16_t chksum_count; + const struct fsdata_chksum *chksum; +#endif /* HTTPD_PRECALCULATED_CHECKSUM */ +}; + +#if LWIP_HTTPD_CUSTOM_FILES +/* Prototypes required to implement custom files as fs addon */ +int fs_open_custom(struct fs_file *file, const char *name); +void fs_close_custom(struct fs_file *file); +#if LWIP_HTTPD_FS_ASYNC_READ +u8_t fs_canread_custom(struct fs_file *file); +u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg); +int fs_read_async_custom(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg); +#else /* LWIP_HTTPD_FS_ASYNC_READ */ +int fs_read_custom(struct fs_file *file, char *buffer, int count); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ +#endif /* LWIP_HTTPD_CUSTOM_FILES */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_FS_H */ diff --git a/lib/lwip/include/lwip/apps/http_client.h b/lib/lwip/include/lwip/apps/http_client.h new file mode 100644 index 0000000000..d39e1bf829 --- /dev/null +++ b/lib/lwip/include/lwip/apps/http_client.h @@ -0,0 +1,160 @@ +/** + * @file + * HTTP client + */ + +/* + * Copyright (c) 2018 Simon Goldschmidt goldsimon@gmx.de + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ + +#ifndef LWIP_HDR_APPS_HTTP_CLIENT_H +#define LWIP_HDR_APPS_HTTP_CLIENT_H + +#include "lwip/opt.h" +#include "lwip/ip_addr.h" +#include "lwip/err.h" +#include "lwip/altcp.h" +#include "lwip/prot/iana.h" +#include "lwip/pbuf.h" + +#if LWIP_TCP && LWIP_CALLBACK_API + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @ingroup httpc + * HTTPC_HAVE_FILE_IO: define this to 1 to have functions dowloading directly + * to disk via fopen/fwrite. + * These functions are example implementations of the interface only. + */ +#ifndef LWIP_HTTPC_HAVE_FILE_IO +#define LWIP_HTTPC_HAVE_FILE_IO 0 +#endif + +/** + * @ingroup httpc + * The default TCP port used for HTTP + */ +#define HTTP_DEFAULT_PORT LWIP_IANA_PORT_HTTP + +/** + * @ingroup httpc + * HTTP client result codes + */ +typedef enum ehttpc_result { + /** File successfully received */ + HTTPC_RESULT_OK = 0, + /** Unknown error */ + HTTPC_RESULT_ERR_UNKNOWN = 1, + /** Connection to server failed */ + HTTPC_RESULT_ERR_CONNECT = 2, + /** Failed to resolve server hostname */ + HTTPC_RESULT_ERR_HOSTNAME = 3, + /** Connection unexpectedly closed by remote server */ + HTTPC_RESULT_ERR_CLOSED = 4, + /** Connection timed out (server didn't respond in time) */ + HTTPC_RESULT_ERR_TIMEOUT = 5, + /** Server responded with an error code */ + HTTPC_RESULT_ERR_SVR_RESP = 6, + /** Local memory error */ + HTTPC_RESULT_ERR_MEM = 7, + /** Local abort */ + HTTPC_RESULT_LOCAL_ABORT = 8, + /** Content length mismatch */ + HTTPC_RESULT_ERR_CONTENT_LEN = 9 +} httpc_result_t; + +typedef struct _httpc_state httpc_state_t; + +/** + * @ingroup httpc + * Prototype of a http client callback function + * + * @param arg argument specified when initiating the request + * @param httpc_result result of the http transfer (see enum httpc_result_t) + * @param rx_content_len number of bytes received (without headers) + * @param srv_res this contains the http status code received (if any) + * @param err an error returned by internal lwip functions, can help to specify + * the source of the error but must not necessarily be != ERR_OK + */ +typedef void (*httpc_result_fn)(void *arg, httpc_result_t httpc_result, u32_t rx_content_len, u32_t srv_res, err_t err); + +/** + * @ingroup httpc + * Prototype of http client callback: called when the headers are received + * + * @param connection http client connection + * @param arg argument specified when initiating the request + * @param hdr header pbuf(s) (may contain data also) + * @param hdr_len length of the heders in 'hdr' + * @param content_len content length as received in the headers (-1 if not received) + * @return if != ERR_OK is returned, the connection is aborted + */ +typedef err_t (*httpc_headers_done_fn)(httpc_state_t *connection, void *arg, struct pbuf *hdr, u16_t hdr_len, u32_t content_len); + +typedef struct _httpc_connection { + ip_addr_t proxy_addr; + u16_t proxy_port; + u8_t use_proxy; + /* @todo: add username:pass? */ + +#if LWIP_ALTCP + altcp_allocator_t *altcp_allocator; +#endif + + /* this callback is called when the transfer is finished (or aborted) */ + httpc_result_fn result_fn; + /* this callback is called after receiving the http headers + It can abort the connection by returning != ERR_OK */ + httpc_headers_done_fn headers_done_fn; +} httpc_connection_t; + +err_t httpc_get_file(const ip_addr_t* server_addr, u16_t port, const char* uri, const httpc_connection_t *settings, + altcp_recv_fn recv_fn, void* callback_arg, httpc_state_t **connection); +err_t httpc_get_file_dns(const char* server_name, u16_t port, const char* uri, const httpc_connection_t *settings, + altcp_recv_fn recv_fn, void* callback_arg, httpc_state_t **connection); + +#if LWIP_HTTPC_HAVE_FILE_IO +err_t httpc_get_file_to_disk(const ip_addr_t* server_addr, u16_t port, const char* uri, const httpc_connection_t *settings, + void* callback_arg, const char* local_file_name, httpc_state_t **connection); +err_t httpc_get_file_dns_to_disk(const char* server_name, u16_t port, const char* uri, const httpc_connection_t *settings, + void* callback_arg, const char* local_file_name, httpc_state_t **connection); +#endif /* LWIP_HTTPC_HAVE_FILE_IO */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_TCP && LWIP_CALLBACK_API */ + +#endif /* LWIP_HDR_APPS_HTTP_CLIENT_H */ diff --git a/lib/lwip/include/lwip/apps/httpd.h b/lib/lwip/include/lwip/apps/httpd.h new file mode 100644 index 0000000000..1ecdd743c2 --- /dev/null +++ b/lib/lwip/include/lwip/apps/httpd.h @@ -0,0 +1,256 @@ +/** + * @file + * HTTP server + */ + +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + * This version of the file has been modified by Texas Instruments to offer + * simple server-side-include (SSI) and Common Gateway Interface (CGI) + * capability. + */ + +#ifndef LWIP_HDR_APPS_HTTPD_H +#define LWIP_HDR_APPS_HTTPD_H + +#include "httpd_opts.h" +#include "lwip/err.h" +#include "lwip/pbuf.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_HTTPD_CGI + +/** + * @ingroup httpd + * Function pointer for a CGI script handler. + * + * This function is called each time the HTTPD server is asked for a file + * whose name was previously registered as a CGI function using a call to + * http_set_cgi_handlers. The iIndex parameter provides the index of the + * CGI within the cgis array passed to http_set_cgi_handlers. Parameters + * pcParam and pcValue provide access to the parameters provided along with + * the URI. iNumParams provides a count of the entries in the pcParam and + * pcValue arrays. Each entry in the pcParam array contains the name of a + * parameter with the corresponding entry in the pcValue array containing the + * value for that parameter. Note that pcParam may contain multiple elements + * with the same name if, for example, a multi-selection list control is used + * in the form generating the data. + * + * The function should return a pointer to a character string which is the + * path and filename of the response that is to be sent to the connected + * browser, for example "/thanks.htm" or "/response/error.ssi". + * + * The maximum number of parameters that will be passed to this function via + * iNumParams is defined by LWIP_HTTPD_MAX_CGI_PARAMETERS. Any parameters in + * the incoming HTTP request above this number will be discarded. + * + * Requests intended for use by this CGI mechanism must be sent using the GET + * method (which encodes all parameters within the URI rather than in a block + * later in the request). Attempts to use the POST method will result in the + * request being ignored. + * + */ +typedef const char *(*tCGIHandler)(int iIndex, int iNumParams, char *pcParam[], + char *pcValue[]); + +/** + * @ingroup httpd + * Structure defining the base filename (URL) of a CGI and the associated + * function which is to be called when that URL is requested. + */ +typedef struct +{ + const char *pcCGIName; + tCGIHandler pfnCGIHandler; +} tCGI; + +/** Set the array of cgi handlers. */ +void http_set_cgi_handlers(const tCGI *pCGIs, int iNumHandlers); + +#endif /* LWIP_HTTPD_CGI */ + +#if LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI + +#if LWIP_HTTPD_CGI_SSI +/* we have to prototype this struct here to make it available for the handler */ +struct fs_file; + +/** Define this generic CGI handler in your application. + * It is called once for every URI with parameters. + * The parameters can be stored to the object passed as connection_state, which + * is allocated to file->state via fs_state_init() from fs_open() or fs_open_custom(). + * Content creation via SSI or complete dynamic files can retrieve the CGI params from there. + */ +extern void httpd_cgi_handler(struct fs_file *file, const char* uri, int iNumParams, + char **pcParam, char **pcValue +#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE + , void *connection_state +#endif /* LWIP_HTTPD_FILE_STATE */ + ); +#endif /* LWIP_HTTPD_CGI_SSI */ + +#endif /* LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI */ + +#if LWIP_HTTPD_SSI + +/** + * @ingroup httpd + * Function pointer for the SSI tag handler callback. + * + * This function will be called each time the HTTPD server detects a tag of the + * form <!--#name--> in files with extensions mentioned in the g_pcSSIExtensions + * array (currently .shtml, .shtm, .ssi, .xml, .json) where "name" appears as + * one of the tags supplied to http_set_ssi_handler in the tags array. The + * returned insert string, which will be appended after the the string + * "<!--#name-->" in file sent back to the client, should be written to pointer + * pcInsert. iInsertLen contains the size of the buffer pointed to by + * pcInsert. The iIndex parameter provides the zero-based index of the tag as + * found in the tags array and identifies the tag that is to be processed. + * + * The handler returns the number of characters written to pcInsert excluding + * any terminating NULL or HTTPD_SSI_TAG_UNKNOWN when tag is not recognized. + * + * Note that the behavior of this SSI mechanism is somewhat different from the + * "normal" SSI processing as found in, for example, the Apache web server. In + * this case, the inserted text is appended following the SSI tag rather than + * replacing the tag entirely. This allows for an implementation that does not + * require significant additional buffering of output data yet which will still + * offer usable SSI functionality. One downside to this approach is when + * attempting to use SSI within JavaScript. The SSI tag is structured to + * resemble an HTML comment but this syntax does not constitute a comment + * within JavaScript and, hence, leaving the tag in place will result in + * problems in these cases. In order to avoid these problems, define + * LWIP_HTTPD_SSI_INCLUDE_TAG as zero in your lwip options file, or use JavaScript + * style block comments in the form / * # name * / (without the spaces). + */ +typedef u16_t (*tSSIHandler)( +#if LWIP_HTTPD_SSI_RAW + const char* ssi_tag_name, +#else /* LWIP_HTTPD_SSI_RAW */ + int iIndex, +#endif /* LWIP_HTTPD_SSI_RAW */ + char *pcInsert, int iInsertLen +#if LWIP_HTTPD_SSI_MULTIPART + , u16_t current_tag_part, u16_t *next_tag_part +#endif /* LWIP_HTTPD_SSI_MULTIPART */ +#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE + , void *connection_state +#endif /* LWIP_HTTPD_FILE_STATE */ + ); + +/** Set the SSI handler function + * (if LWIP_HTTPD_SSI_RAW==1, only the first argument is used) + */ +void http_set_ssi_handler(tSSIHandler pfnSSIHandler, + const char **ppcTags, int iNumTags); + +/** For LWIP_HTTPD_SSI_RAW==1, return this to indicate the tag is unknown. + * In this case, the webserver writes a warning into the page. + * You can also just return 0 to write nothing for unknown tags. + */ +#define HTTPD_SSI_TAG_UNKNOWN 0xFFFF + +#endif /* LWIP_HTTPD_SSI */ + +#if LWIP_HTTPD_SUPPORT_POST + +/* These functions must be implemented by the application */ + +/** + * @ingroup httpd + * Called when a POST request has been received. The application can decide + * whether to accept it or not. + * + * @param connection Unique connection identifier, valid until httpd_post_end + * is called. + * @param uri The HTTP header URI receiving the POST request. + * @param http_request The raw HTTP request (the first packet, normally). + * @param http_request_len Size of 'http_request'. + * @param content_len Content-Length from HTTP header. + * @param response_uri Filename of response file, to be filled when denying the + * request + * @param response_uri_len Size of the 'response_uri' buffer. + * @param post_auto_wnd Set this to 0 to let the callback code handle window + * updates by calling 'httpd_post_data_recved' (to throttle rx speed) + * default is 1 (httpd handles window updates automatically) + * @return ERR_OK: Accept the POST request, data may be passed in + * another err_t: Deny the POST request, send back 'bad request'. + */ +err_t httpd_post_begin(void *connection, const char *uri, const char *http_request, + u16_t http_request_len, int content_len, char *response_uri, + u16_t response_uri_len, u8_t *post_auto_wnd); + +/** + * @ingroup httpd + * Called for each pbuf of data that has been received for a POST. + * ATTENTION: The application is responsible for freeing the pbufs passed in! + * + * @param connection Unique connection identifier. + * @param p Received data. + * @return ERR_OK: Data accepted. + * another err_t: Data denied, http_post_get_response_uri will be called. + */ +err_t httpd_post_receive_data(void *connection, struct pbuf *p); + +/** + * @ingroup httpd + * Called when all data is received or when the connection is closed. + * The application must return the filename/URI of a file to send in response + * to this POST request. If the response_uri buffer is untouched, a 404 + * response is returned. + * + * @param connection Unique connection identifier. + * @param response_uri Filename of response file, to be filled when denying the request + * @param response_uri_len Size of the 'response_uri' buffer. + */ +void httpd_post_finished(void *connection, char *response_uri, u16_t response_uri_len); + +#if LWIP_HTTPD_POST_MANUAL_WND +void httpd_post_data_recved(void *connection, u16_t recved_len); +#endif /* LWIP_HTTPD_POST_MANUAL_WND */ + +#endif /* LWIP_HTTPD_SUPPORT_POST */ + +void httpd_init(void); + +#if HTTPD_ENABLE_HTTPS +struct altcp_tls_config; +void httpd_inits(struct altcp_tls_config *conf); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_HTTPD_H */ diff --git a/lib/lwip/include/lwip/apps/httpd_opts.h b/lib/lwip/include/lwip/apps/httpd_opts.h new file mode 100644 index 0000000000..2b66e67112 --- /dev/null +++ b/lib/lwip/include/lwip/apps/httpd_opts.h @@ -0,0 +1,416 @@ +/** + * @file + * HTTP server options list + */ + +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + * This version of the file has been modified by Texas Instruments to offer + * simple server-side-include (SSI) and Common Gateway Interface (CGI) + * capability. + */ + +#ifndef LWIP_HDR_APPS_HTTPD_OPTS_H +#define LWIP_HDR_APPS_HTTPD_OPTS_H + +#include "lwip/opt.h" +#include "lwip/prot/iana.h" + +/** + * @defgroup httpd_opts Options + * @ingroup httpd + * @{ + */ + +/** Set this to 1 to support CGI (old style). + * + * This old style CGI support works by registering an array of URLs and + * associated CGI handler functions (@ref http_set_cgi_handlers). + * This list is scanned just before fs_open is called from request handling. + * The handler can return a new URL that is used internally by the httpd to + * load the returned page (passed to fs_open). + * + * Use this CGI type e.g. to execute specific actions and return a page that + * does not depend on the CGI parameters. + */ +#if !defined LWIP_HTTPD_CGI || defined __DOXYGEN__ +#define LWIP_HTTPD_CGI 0 +#endif + +/** Set this to 1 to support CGI (new style). + * + * This new style CGI support works by calling a global function + * (@ref tCGIHandler) for all URLs that are found. fs_open is called first + * and the URL can not be written by the CGI handler. Instead, this handler gets + * passed the http file state, an object where it can store information derived + * from the CGI URL or parameters. This file state is later passed to SSI, so + * the SSI code can return data depending on CGI input. + * + * Use this CGI handler if you want CGI information passed on to SSI. + */ +#if !defined LWIP_HTTPD_CGI_SSI || defined __DOXYGEN__ +#define LWIP_HTTPD_CGI_SSI 0 +#endif + +/** Set this to 1 to support SSI (Server-Side-Includes) + * + * In contrast to other http servers, this only calls a preregistered callback + * function (@see http_set_ssi_handler) for each tag (in the format of + * <!--#tag-->) encountered in SSI-enabled pages. + * SSI-enabled pages must have one of the predefined SSI-enabled file extensions. + * All files with one of these extensions are parsed when sent. + * + * A downside of the current SSI implementation is that persistent connections + * don't work, as the file length is not known in advance (and httpd currently + * relies on the Content-Length header for persistent connections). + * + * To save memory, the maximum tag length is limited (@see LWIP_HTTPD_MAX_TAG_NAME_LEN). + * To save memory, the maximum insertion string length is limited (@see + * LWIP_HTTPD_MAX_TAG_INSERT_LEN). If this is not enough, @ref LWIP_HTTPD_SSI_MULTIPART + * can be used. + */ +#if !defined LWIP_HTTPD_SSI || defined __DOXYGEN__ +#define LWIP_HTTPD_SSI 0 +#endif + +/** Set this to 1 to implement an SSI tag handler callback that gets a const char* + * to the tag (instead of an index into a pre-registered array of known tags) + * If this is 0, the SSI handler callback function is only called pre-registered tags. + */ +#if !defined LWIP_HTTPD_SSI_RAW || defined __DOXYGEN__ +#define LWIP_HTTPD_SSI_RAW 0 +#endif + +/** Set this to 0 to prevent parsing the file extension at runtime to decide + * if a file should be scanned for SSI tags or not. + * Default is 1 (file extensions are checked using the g_pcSSIExtensions array) + * Set to 2 to override this runtime test function. In this case, you have to + * provide an external function that does the check: + * u8_t http_uri_is_ssi(struct fs_file *file, const char *uri) + * + * This is enabled by default, but if you only use a newer version of makefsdata + * supporting the "-ssi" option, this info is already present in + */ +#if !defined LWIP_HTTPD_SSI_BY_FILE_EXTENSION || defined __DOXYGEN__ +#define LWIP_HTTPD_SSI_BY_FILE_EXTENSION 1 +#endif + +/** This is a list of file extensions handled as SSI files. This define + * is used to initialize a 'const char *const[]'. It is only used if + * LWIP_HTTPD_SSI_BY_FILE_EXTENSION != 0. + */ +#if !defined LWIP_HTTPD_SSI_EXTENSIONS || defined __DOXYGEN__ +#define LWIP_HTTPD_SSI_EXTENSIONS ".shtml", ".shtm", ".ssi", ".xml", ".json" +#endif + +/** Set this to 1 to support HTTP POST */ +#if !defined LWIP_HTTPD_SUPPORT_POST || defined __DOXYGEN__ +#define LWIP_HTTPD_SUPPORT_POST 0 +#endif + +/* The maximum number of parameters that the CGI handler can be sent. */ +#if !defined LWIP_HTTPD_MAX_CGI_PARAMETERS || defined __DOXYGEN__ +#define LWIP_HTTPD_MAX_CGI_PARAMETERS 16 +#endif + +/** LWIP_HTTPD_SSI_MULTIPART==1: SSI handler function is called with 2 more + * arguments indicating a counter for insert string that are too long to be + * inserted at once: the SSI handler function must then set 'next_tag_part' + * which will be passed back to it in the next call. */ +#if !defined LWIP_HTTPD_SSI_MULTIPART || defined __DOXYGEN__ +#define LWIP_HTTPD_SSI_MULTIPART 0 +#endif + +/* The maximum length of the string comprising the SSI tag name + * ATTENTION: tags longer than this are ignored, not truncated! + */ +#if !defined LWIP_HTTPD_MAX_TAG_NAME_LEN || defined __DOXYGEN__ +#define LWIP_HTTPD_MAX_TAG_NAME_LEN 8 +#endif + +/* The maximum length of string that can be returned to replace any given tag + * If this buffer is not long enough, use LWIP_HTTPD_SSI_MULTIPART. + */ +#if !defined LWIP_HTTPD_MAX_TAG_INSERT_LEN || defined __DOXYGEN__ +#define LWIP_HTTPD_MAX_TAG_INSERT_LEN 192 +#endif + +#if !defined LWIP_HTTPD_POST_MANUAL_WND || defined __DOXYGEN__ +#define LWIP_HTTPD_POST_MANUAL_WND 0 +#endif + +/** This string is passed in the HTTP header as "Server: " */ +#if !defined HTTPD_SERVER_AGENT || defined __DOXYGEN__ +#define HTTPD_SERVER_AGENT "lwIP/" LWIP_VERSION_STRING " (http://savannah.nongnu.org/projects/lwip)" +#endif + +/** Set this to 1 if you want to include code that creates HTTP headers + * at runtime. Default is off: HTTP headers are then created statically + * by the makefsdata tool. Static headers mean smaller code size, but + * the (readonly) fsdata will grow a bit as every file includes the HTTP + * header. */ +#if !defined LWIP_HTTPD_DYNAMIC_HEADERS || defined __DOXYGEN__ +#define LWIP_HTTPD_DYNAMIC_HEADERS 0 +#endif + +#if !defined HTTPD_DEBUG || defined __DOXYGEN__ +#define HTTPD_DEBUG LWIP_DBG_OFF +#endif + +/** Set this to 1 to use a memp pool for allocating + * struct http_state instead of the heap. + * If enabled, you'll need to define MEMP_NUM_PARALLEL_HTTPD_CONNS + * (and MEMP_NUM_PARALLEL_HTTPD_SSI_CONNS for SSI) to set the size of + * the pool(s). + */ +#if !defined HTTPD_USE_MEM_POOL || defined __DOXYGEN__ +#define HTTPD_USE_MEM_POOL 0 +#endif + +/** The server port for HTTPD to use */ +#if !defined HTTPD_SERVER_PORT || defined __DOXYGEN__ +#define HTTPD_SERVER_PORT LWIP_IANA_PORT_HTTP +#endif + +/** The https server port for HTTPD to use */ +#if !defined HTTPD_SERVER_PORT_HTTPS || defined __DOXYGEN__ +#define HTTPD_SERVER_PORT_HTTPS LWIP_IANA_PORT_HTTPS +#endif + +/** Enable https support? */ +#if !defined HTTPD_ENABLE_HTTPS || defined __DOXYGEN__ +#define HTTPD_ENABLE_HTTPS 0 +#endif + +/** Maximum retries before the connection is aborted/closed. + * - number of times pcb->poll is called -> default is 4*500ms = 2s; + * - reset when pcb->sent is called + */ +#if !defined HTTPD_MAX_RETRIES || defined __DOXYGEN__ +#define HTTPD_MAX_RETRIES 4 +#endif + +/** The poll delay is X*500ms */ +#if !defined HTTPD_POLL_INTERVAL || defined __DOXYGEN__ +#define HTTPD_POLL_INTERVAL 4 +#endif + +/** Priority for tcp pcbs created by HTTPD (very low by default). + * Lower priorities get killed first when running out of memory. + */ +#if !defined HTTPD_TCP_PRIO || defined __DOXYGEN__ +#define HTTPD_TCP_PRIO TCP_PRIO_MIN +#endif + +/** Set this to 1 to enable timing each file sent */ +#if !defined LWIP_HTTPD_TIMING || defined __DOXYGEN__ +#define LWIP_HTTPD_TIMING 0 +#endif +/** Set this to 1 to enable timing each file sent */ +#if !defined HTTPD_DEBUG_TIMING || defined __DOXYGEN__ +#define HTTPD_DEBUG_TIMING LWIP_DBG_OFF +#endif + +/** Set this to one to show error pages when parsing a request fails instead + of simply closing the connection. */ +#if !defined LWIP_HTTPD_SUPPORT_EXTSTATUS || defined __DOXYGEN__ +#define LWIP_HTTPD_SUPPORT_EXTSTATUS 0 +#endif + +/** Set this to 0 to drop support for HTTP/0.9 clients (to save some bytes) */ +#if !defined LWIP_HTTPD_SUPPORT_V09 || defined __DOXYGEN__ +#define LWIP_HTTPD_SUPPORT_V09 1 +#endif + +/** Set this to 1 to enable HTTP/1.1 persistent connections. + * ATTENTION: If the generated file system includes HTTP headers, these must + * include the "Connection: keep-alive" header (pass argument "-11" to makefsdata). + */ +#if !defined LWIP_HTTPD_SUPPORT_11_KEEPALIVE || defined __DOXYGEN__ +#define LWIP_HTTPD_SUPPORT_11_KEEPALIVE 0 +#endif + +/** Set this to 1 to support HTTP request coming in in multiple packets/pbufs */ +#if !defined LWIP_HTTPD_SUPPORT_REQUESTLIST || defined __DOXYGEN__ +#define LWIP_HTTPD_SUPPORT_REQUESTLIST 1 +#endif + +#if LWIP_HTTPD_SUPPORT_REQUESTLIST +/** Number of rx pbufs to enqueue to parse an incoming request (up to the first + newline) */ +#if !defined LWIP_HTTPD_REQ_QUEUELEN || defined __DOXYGEN__ +#define LWIP_HTTPD_REQ_QUEUELEN 5 +#endif + +/** Number of (TCP payload-) bytes (in pbufs) to enqueue to parse and incoming + request (up to the first double-newline) */ +#if !defined LWIP_HTTPD_REQ_BUFSIZE || defined __DOXYGEN__ +#define LWIP_HTTPD_REQ_BUFSIZE LWIP_HTTPD_MAX_REQ_LENGTH +#endif + +/** Defines the maximum length of a HTTP request line (up to the first CRLF, + copied from pbuf into this a global buffer when pbuf- or packet-queues + are received - otherwise the input pbuf is used directly) */ +#if !defined LWIP_HTTPD_MAX_REQ_LENGTH || defined __DOXYGEN__ +#define LWIP_HTTPD_MAX_REQ_LENGTH LWIP_MIN(1023, (LWIP_HTTPD_REQ_QUEUELEN * PBUF_POOL_BUFSIZE)) +#endif +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + +/** This is the size of a static buffer used when URIs end with '/'. + * In this buffer, the directory requested is concatenated with all the + * configured default file names. + * Set to 0 to disable checking default filenames on non-root directories. + */ +#if !defined LWIP_HTTPD_MAX_REQUEST_URI_LEN || defined __DOXYGEN__ +#define LWIP_HTTPD_MAX_REQUEST_URI_LEN 63 +#endif + +/** Maximum length of the filename to send as response to a POST request, + * filled in by the application when a POST is finished. + */ +#if !defined LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN || defined __DOXYGEN__ +#define LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN 63 +#endif + +/** Set this to 0 to not send the SSI tag (default is on, so the tag will + * be sent in the HTML page */ +#if !defined LWIP_HTTPD_SSI_INCLUDE_TAG || defined __DOXYGEN__ +#define LWIP_HTTPD_SSI_INCLUDE_TAG 1 +#endif + +/** Set this to 1 to call tcp_abort when tcp_close fails with memory error. + * This can be used to prevent consuming all memory in situations where the + * HTTP server has low priority compared to other communication. */ +#if !defined LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR || defined __DOXYGEN__ +#define LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR 0 +#endif + +/** Set this to 1 to kill the oldest connection when running out of + * memory for 'struct http_state' or 'struct http_ssi_state'. + * ATTENTION: This puts all connections on a linked list, so may be kind of slow. + */ +#if !defined LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED || defined __DOXYGEN__ +#define LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED 0 +#endif + +/** Set this to 1 to send URIs without extension without headers + * (who uses this at all??) */ +#if !defined LWIP_HTTPD_OMIT_HEADER_FOR_EXTENSIONLESS_URI || defined __DOXYGEN__ +#define LWIP_HTTPD_OMIT_HEADER_FOR_EXTENSIONLESS_URI 0 +#endif + +/** Default: Tags are sent from struct http_state and are therefore volatile */ +#if !defined HTTP_IS_TAG_VOLATILE || defined __DOXYGEN__ +#define HTTP_IS_TAG_VOLATILE(ptr) TCP_WRITE_FLAG_COPY +#endif + +/* By default, the httpd is limited to send 2*pcb->mss to keep resource usage low + when http is not an important protocol in the device. */ +#if !defined HTTPD_LIMIT_SENDING_TO_2MSS || defined __DOXYGEN__ +#define HTTPD_LIMIT_SENDING_TO_2MSS 1 +#endif + +/* Define this to a function that returns the maximum amount of data to enqueue. + The function have this signature: u16_t fn(struct altcp_pcb* pcb); + The best place to define this is the hooks file (@see LWIP_HOOK_FILENAME) */ +#if !defined HTTPD_MAX_WRITE_LEN || defined __DOXYGEN__ +#if HTTPD_LIMIT_SENDING_TO_2MSS +#define HTTPD_MAX_WRITE_LEN(pcb) ((u16_t)(2 * altcp_mss(pcb))) +#endif +#endif + +/*------------------- FS OPTIONS -------------------*/ + +/** Set this to 1 and provide the functions: + * - "int fs_open_custom(struct fs_file *file, const char *name)" + * Called first for every opened file to allow opening files + * that are not included in fsdata(_custom).c + * - "void fs_close_custom(struct fs_file *file)" + * Called to free resources allocated by fs_open_custom(). + */ +#if !defined LWIP_HTTPD_CUSTOM_FILES || defined __DOXYGEN__ +#define LWIP_HTTPD_CUSTOM_FILES 0 +#endif + +/** Set this to 1 to support fs_read() to dynamically read file data. + * Without this (default=off), only one-block files are supported, + * and the contents must be ready after fs_open(). + */ +#if !defined LWIP_HTTPD_DYNAMIC_FILE_READ || defined __DOXYGEN__ +#define LWIP_HTTPD_DYNAMIC_FILE_READ 0 +#endif + +/** Set this to 1 to include an application state argument per file + * that is opened. This allows to keep a state per connection/file. + */ +#if !defined LWIP_HTTPD_FILE_STATE || defined __DOXYGEN__ +#define LWIP_HTTPD_FILE_STATE 0 +#endif + +/** Set this to 1 to add the pextension field to the fs_file structure. + * This is included here to retain compatibility with legacy code that + * relies on the presence of the pextension field. + * New code should use LWIP_HTTPD_FILE_STATE instead. + * This option may be removed in a future version of lwip. + */ +#if !defined LWIP_HTTPD_FILE_EXTENSION || defined __DOXYGEN__ +#define LWIP_HTTPD_FILE_EXTENSION 0 +#endif + +/** HTTPD_PRECALCULATED_CHECKSUM==1: include precompiled checksums for + * predefined (MSS-sized) chunks of the files to prevent having to calculate + * the checksums at runtime. */ +#if !defined HTTPD_PRECALCULATED_CHECKSUM || defined __DOXYGEN__ +#define HTTPD_PRECALCULATED_CHECKSUM 0 +#endif + +/** LWIP_HTTPD_FS_ASYNC_READ==1: support asynchronous read operations + * (fs_read_async returns FS_READ_DELAYED and calls a callback when finished). + */ +#if !defined LWIP_HTTPD_FS_ASYNC_READ || defined __DOXYGEN__ +#define LWIP_HTTPD_FS_ASYNC_READ 0 +#endif + +/** Filename (including path) to use as FS data file */ +#if !defined HTTPD_FSDATA_FILE || defined __DOXYGEN__ +/* HTTPD_USE_CUSTOM_FSDATA: Compatibility with deprecated lwIP option */ +#if defined(HTTPD_USE_CUSTOM_FSDATA) && (HTTPD_USE_CUSTOM_FSDATA != 0) +#define HTTPD_FSDATA_FILE "fsdata_custom.c" +#else +#define HTTPD_FSDATA_FILE "fsdata.c" +#endif +#endif + +/** + * @} + */ + +#endif /* LWIP_HDR_APPS_HTTPD_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/lwiperf.h b/lib/lwip/include/lwip/apps/lwiperf.h new file mode 100644 index 0000000000..e6f4476a1f --- /dev/null +++ b/lib/lwip/include/lwip/apps/lwiperf.h @@ -0,0 +1,109 @@ +/** + * @file + * lwIP iPerf server implementation + */ + +/* + * Copyright (c) 2014 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt + * + */ +#ifndef LWIP_HDR_APPS_LWIPERF_H +#define LWIP_HDR_APPS_LWIPERF_H + +#include "lwip/opt.h" +#include "lwip/ip_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define LWIPERF_TCP_PORT_DEFAULT 5001 + +/** lwIPerf test results */ +enum lwiperf_report_type +{ + /** The server side test is done */ + LWIPERF_TCP_DONE_SERVER, + /** The client side test is done */ + LWIPERF_TCP_DONE_CLIENT, + /** Local error lead to test abort */ + LWIPERF_TCP_ABORTED_LOCAL, + /** Data check error lead to test abort */ + LWIPERF_TCP_ABORTED_LOCAL_DATAERROR, + /** Transmit error lead to test abort */ + LWIPERF_TCP_ABORTED_LOCAL_TXERROR, + /** Remote side aborted the test */ + LWIPERF_TCP_ABORTED_REMOTE +}; + +/** Control */ +enum lwiperf_client_type +{ + /** Unidirectional tx only test */ + LWIPERF_CLIENT, + /** Do a bidirectional test simultaneously */ + LWIPERF_DUAL, + /** Do a bidirectional test individually */ + LWIPERF_TRADEOFF +}; + +/** Prototype of a report function that is called when a session is finished. + This report function can show the test results. + @param arg Report_arg from when the test was started. + @param report_type contains the test result + @param local_addr The local address from the session + @param local_port The local port + @param remote_addr The remote address from the session + @param remote_port The remote port + @param bytes_transferred Total transferred bytes + @param ms_duration Total session duration, in milliseconds + @param bandwidth_kbitpsec Average bandwidth during the session, in kbps +*/ +typedef void (*lwiperf_report_fn)(void *arg, enum lwiperf_report_type report_type, + const ip_addr_t* local_addr, u16_t local_port, const ip_addr_t* remote_addr, u16_t remote_port, + u32_t bytes_transferred, u32_t ms_duration, u32_t bandwidth_kbitpsec); + +void* lwiperf_start_tcp_server(const ip_addr_t* local_addr, u16_t local_port, + lwiperf_report_fn report_fn, void* report_arg); +void* lwiperf_start_tcp_server_default(lwiperf_report_fn report_fn, void* report_arg); +void* lwiperf_start_tcp_client(const ip_addr_t* remote_addr, u16_t remote_port, + enum lwiperf_client_type type, + lwiperf_report_fn report_fn, void* report_arg); +void* lwiperf_start_tcp_client_default(const ip_addr_t* remote_addr, + lwiperf_report_fn report_fn, void* report_arg); + +void lwiperf_abort(void* lwiperf_session); + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_LWIPERF_H */ diff --git a/lib/lwip/include/lwip/apps/mdns.h b/lib/lwip/include/lwip/apps/mdns.h new file mode 100644 index 0000000000..33da4a3e83 --- /dev/null +++ b/lib/lwip/include/lwip/apps/mdns.h @@ -0,0 +1,154 @@ +/** + * @file + * MDNS responder + */ + + /* + * Copyright (c) 2015 Verisure Innovation AB + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Ekman erik@kryo.se + * Author: Jasper Verschueren jasper.verschueren@apart-audio.com + * + */ + +#ifndef LWIP_HDR_APPS_MDNS_H +#define LWIP_HDR_APPS_MDNS_H + +#include "lwip/apps/mdns_opts.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_MDNS_RESPONDER + +enum mdns_sd_proto { + DNSSD_PROTO_UDP = 0, + DNSSD_PROTO_TCP = 1 +}; + +#define MDNS_PROBING_CONFLICT 0 +#define MDNS_PROBING_SUCCESSFUL 1 + +#define MDNS_LABEL_MAXLEN 63 +#define MDNS_DOMAIN_MAXLEN 256 + +struct mdns_host; +struct mdns_service; + +/* Domain structs */ +struct mdns_domain { + /* Encoded domain name */ + u8_t name[MDNS_DOMAIN_MAXLEN]; + /* Total length of domain name, including zero */ + u16_t length; + /* Set if compression of this domain is not allowed */ + u8_t skip_compression; +}; + +/** Domain, type and class. + * Shared between questions and answers */ +struct mdns_rr_info { + struct mdns_domain domain; + u16_t type; + u16_t klass; +}; + +struct mdns_answer { + struct mdns_rr_info info; + /** cache flush command bit */ + u16_t cache_flush; + /* Validity time in seconds */ + u32_t ttl; + /** Length of variable answer */ + u16_t rd_length; + /** Offset of start of variable answer in packet */ + u16_t rd_offset; +}; + +/** Callback function to add text to a reply, called when generating the reply */ +typedef void (*service_get_txt_fn_t)(struct mdns_service *service, void *txt_userdata); + +/** Callback function to let application know the result of probing network for name + * uniqueness, called with result MDNS_PROBING_SUCCESSFUL if no other node claimed + * use for the name for the netif or a service and is safe to use, or MDNS_PROBING_CONFLICT + * if another node is already using it and mdns is disabled on this interface */ +typedef void (*mdns_name_result_cb_t)(struct netif* netif, u8_t result, s8_t slot); + +void *mdns_get_service_txt_userdata(struct netif *netif, s8_t slot); + +void mdns_resp_init(void); + +void mdns_resp_register_name_result_cb(mdns_name_result_cb_t cb); + +err_t mdns_resp_add_netif(struct netif *netif, const char *hostname); +err_t mdns_resp_remove_netif(struct netif *netif); +err_t mdns_resp_rename_netif(struct netif *netif, const char *hostname); +int mdns_resp_netif_active(struct netif *netif); + +s8_t mdns_resp_add_service(struct netif *netif, const char *name, const char *service, enum mdns_sd_proto proto, u16_t port, service_get_txt_fn_t txt_fn, void *txt_userdata); +err_t mdns_resp_del_service(struct netif *netif, u8_t slot); +err_t mdns_resp_rename_service(struct netif *netif, u8_t slot, const char *name); + +err_t mdns_resp_add_service_txtitem(struct mdns_service *service, const char *txt, u8_t txt_len); + +void mdns_resp_restart_delay(struct netif *netif, uint32_t delay); +void mdns_resp_restart(struct netif *netif); +void mdns_resp_announce(struct netif *netif); + +/** + * @ingroup mdns + * Announce IP settings have changed on netif. + * Call this in your callback registered by netif_set_status_callback(). + * No need to call this function when LWIP_NETIF_EXT_STATUS_CALLBACK==1, + * this handled automatically for you. + * @param netif The network interface where settings have changed. + */ +#define mdns_resp_netif_settings_changed(netif) mdns_resp_announce(netif) + +#if LWIP_MDNS_SEARCH +typedef void (*search_result_fn_t)(struct mdns_answer *answer, const char *varpart, int varlen, int flags, void *arg); +/* flags bits, both can be set! */ +#define MDNS_SEARCH_RESULT_FIRST 1 /* First answer in received frame. */ +#define MDNS_SEARCH_RESULT_LAST 2 /* Last answer. */ + +err_t mdns_search_service(const char *name, const char *service, enum mdns_sd_proto proto, + struct netif *netif, search_result_fn_t result_fn, void *arg, + u8_t *request_id); +void mdns_search_stop(u8_t request_id); + +#endif /* LWIP_MDNS_SEARCH */ + +#endif /* LWIP_MDNS_RESPONDER */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_MDNS_H */ diff --git a/lib/lwip/include/lwip/apps/mdns_domain.h b/lib/lwip/include/lwip/apps/mdns_domain.h new file mode 100644 index 0000000000..9fa804e6b8 --- /dev/null +++ b/lib/lwip/include/lwip/apps/mdns_domain.h @@ -0,0 +1,80 @@ +/** + * @file + * MDNS responder - domain related functionalities + */ + + /* + * Copyright (c) 2015 Verisure Innovation AB + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Ekman erik@kryo.se + * Author: Jasper Verschueren jasper.verschueren@apart-audio.com + * + */ + +#ifndef LWIP_HDR_APPS_MDNS_DOMAIN_H +#define LWIP_HDR_APPS_MDNS_DOMAIN_H + +#include "lwip/apps/mdns_opts.h" +#include "lwip/apps/mdns_priv.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_MDNS_RESPONDER + +/* Domain methods - also visible for unit tests */ + +err_t mdns_domain_add_label(struct mdns_domain *domain, const char *label, u8_t len); +err_t mdns_domain_add_domain(struct mdns_domain *domain, struct mdns_domain *source); +err_t mdns_domain_add_string(struct mdns_domain *domain, const char *source); +u16_t mdns_readname(struct pbuf *p, u16_t offset, struct mdns_domain *domain); +void mdns_domain_debug_print(struct mdns_domain *domain); +int mdns_domain_eq(struct mdns_domain *a, struct mdns_domain *b); +#if LWIP_IPV4 +err_t mdns_build_reverse_v4_domain(struct mdns_domain *domain, const ip4_addr_t *addr); +#endif +#if LWIP_IPV6 +err_t mdns_build_reverse_v6_domain(struct mdns_domain *domain, const ip6_addr_t *addr); +#endif +err_t mdns_build_host_domain(struct mdns_domain *domain, struct mdns_host *mdns); +err_t mdns_build_dnssd_domain(struct mdns_domain *domain); +err_t mdns_build_service_domain(struct mdns_domain *domain, struct mdns_service *service, int include_name); +#if LWIP_MDNS_SEARCH +err_t mdns_build_request_domain(struct mdns_domain *domain, struct mdns_request *request, int include_name); +#endif +u16_t mdns_compress_domain(struct pbuf *pbuf, u16_t *offset, struct mdns_domain *domain); +err_t mdns_write_domain(struct mdns_outpacket *outpkt, struct mdns_domain *domain); + +#endif /* LWIP_MDNS_RESPONDER */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_MDNS_DOMAIN_H */ diff --git a/lib/lwip/include/lwip/apps/mdns_opts.h b/lib/lwip/include/lwip/apps/mdns_opts.h new file mode 100644 index 0000000000..1eee3e3830 --- /dev/null +++ b/lib/lwip/include/lwip/apps/mdns_opts.h @@ -0,0 +1,121 @@ +/** + * @file + * MDNS responder + */ + + /* + * Copyright (c) 2015 Verisure Innovation AB + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Ekman erik@kryo.se + * Author: Jasper Verschueren jasper.verschueren@apart-audio.com + * + */ + +#ifndef LWIP_HDR_APPS_MDNS_OPTS_H +#define LWIP_HDR_APPS_MDNS_OPTS_H + +#include "lwip/opt.h" + +/** + * @defgroup mdns_opts Options + * @ingroup mdns + * @{ + */ + +/** + * LWIP_MDNS_RESPONDER==1: Turn on multicast DNS module. UDP must be available for MDNS + * transport. IGMP is needed for IPv4 multicast. + */ +#ifndef LWIP_MDNS_RESPONDER +#define LWIP_MDNS_RESPONDER 0 +#endif /* LWIP_MDNS_RESPONDER */ + +/** The maximum number of services per netif */ +#ifndef MDNS_MAX_SERVICES +#define MDNS_MAX_SERVICES 1 +#endif + +/** The minimum delay between probes in ms. RFC 6762 require 250ms. + * In noisy WiFi environment, adding 30-50ms to this value help a lot for + * a successful Apple BCT tests. + */ +#ifndef MDNS_PROBE_DELAY_MS +#define MDNS_PROBE_DELAY_MS 250 +#endif + +/** The maximum number of received packets stored in chained list of known + * answers for pending truncated questions. This value define the size of + * the MDNS_PKTS mempool. + * Up to MDNS_MAX_STORED_PKTS pbuf can be stored in addition to TC questions + * that are pending. + */ +#ifndef MDNS_MAX_STORED_PKTS +#define MDNS_MAX_STORED_PKTS 4 +#endif + +/** Payload size allocated for each outgoing UDP packet. Will be allocated with + * PBUF_RAM and freed after packet was sent. + * According to RFC 6762, there is no reason to retain the 512 bytes restriction + * for link-local multicast packet. + * 512 bytes isn't enough when 2 services need to be probed. + */ +#ifndef MDNS_OUTPUT_PACKET_SIZE +#define MDNS_OUTPUT_PACKET_SIZE ((MDNS_MAX_SERVICES == 1) ? 512 : 1450) +#endif + +/** MDNS_RESP_USENETIF_EXTCALLBACK==1: register an ext_callback on the netif + * to automatically restart probing/announcing on status or address change. + */ +#ifndef MDNS_RESP_USENETIF_EXTCALLBACK +#define MDNS_RESP_USENETIF_EXTCALLBACK LWIP_NETIF_EXT_STATUS_CALLBACK +#endif + +/** + * LWIP_MDNS_SEARCH==1: Turn on search over multicast DNS module. + */ +#ifndef LWIP_MDNS_SEARCH +#define LWIP_MDNS_SEARCH 1 +#endif + +/** The maximum number of running requests */ +#ifndef MDNS_MAX_REQUESTS +#define MDNS_MAX_REQUESTS 2 +#endif + +/** + * MDNS_DEBUG: Enable debugging for multicast DNS. + */ +#ifndef MDNS_DEBUG +#define MDNS_DEBUG LWIP_DBG_OFF +#endif + +/** + * @} + */ + +#endif /* LWIP_HDR_APPS_MDNS_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/mdns_out.h b/lib/lwip/include/lwip/apps/mdns_out.h new file mode 100644 index 0000000000..e6a7e3884b --- /dev/null +++ b/lib/lwip/include/lwip/apps/mdns_out.h @@ -0,0 +1,138 @@ +/** + * @file + * MDNS responder - output related functionalities + */ + + /* + * Copyright (c) 2015 Verisure Innovation AB + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Ekman erik@kryo.se + * Author: Jasper Verschueren jasper.verschueren@apart-audio.com + * + */ + +#ifndef LWIP_HDR_APPS_MDNS_OUT_H +#define LWIP_HDR_APPS_MDNS_OUT_H + +#include "lwip/apps/mdns_opts.h" +#include "lwip/apps/mdns_priv.h" +#include "lwip/netif.h" +#include "lwip/timeouts.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_MDNS_RESPONDER + +/** Bitmasks outmsg generation */ +/* Probe for ALL types with hostname */ +#define QUESTION_PROBE_HOST_ANY 0x10 +/* Probe for ALL types with service instance name */ +#define QUESTION_PROBE_SERVICE_NAME_ANY 0x10 + +/* Lookup from hostname -> IPv4 */ +#define REPLY_HOST_A 0x01 +/* Lookup from IPv4/v6 -> hostname */ +#define REPLY_HOST_PTR_V4 0x02 +/* Lookup from hostname -> IPv6 */ +#define REPLY_HOST_AAAA 0x04 +/* Lookup from hostname -> IPv6 */ +#define REPLY_HOST_PTR_V6 0x08 + +/* Lookup for service types */ +#define REPLY_SERVICE_TYPE_PTR 0x10 +/* Lookup for instances of service */ +#define REPLY_SERVICE_NAME_PTR 0x20 +/* Lookup for location of service instance */ +#define REPLY_SERVICE_SRV 0x40 +/* Lookup for text info on service instance */ +#define REPLY_SERVICE_TXT 0x80 + +/* RFC6762 section 6: + * To protect the network against excessive packet flooding due to software bugs + * or malicious attack, a Multicast DNS responder MUST NOT (except in the one + * special case of answering probe queries) multicast a record on a given + * interface until at least one second has elapsed since the last time that + * record was multicast on that particular interface. + */ +#define MDNS_MULTICAST_TIMEOUT 1000 + +/* RFC6762 section 6: + * In this special case only, when responding via multicast to a probe, a + * Multicast DNS responder is only required to delay its transmission as + * necessary to ensure an interval of at least 250 ms since the last time the + * record was multicast on that interface. + */ +#define MDNS_MULTICAST_PROBE_TIMEOUT 250 + +/* RFC6762 section 5.4: + * When receiving a question with the unicast-response bit set, a responder + * SHOULD usually respond with a unicast packet directed back to the querier. + * However, if the responder has not multicast that record recently (within one + * quarter of its TTL), then the responder SHOULD instead multicast the response + * so as to keep all the peer caches up to date, and to permit passive conflict + * detection. + * -> we implement a stripped down version. Depending on a timeout of 30s + * (25% of 120s) all QU questions are send via multicast or unicast. + */ +#define MDNS_MULTICAST_TIMEOUT_25TTL 30000 + +err_t mdns_create_outpacket(struct netif *netif, struct mdns_outmsg *msg, + struct mdns_outpacket *outpkt); +err_t mdns_send_outpacket(struct mdns_outmsg *msg, struct netif *netif); +void mdns_set_timeout(struct netif *netif, u32_t msecs, + sys_timeout_handler handler, u8_t *busy_flag); +#if LWIP_IPV4 +void mdns_multicast_timeout_reset_ipv4(void *arg); +void mdns_multicast_probe_timeout_reset_ipv4(void *arg); +void mdns_multicast_timeout_25ttl_reset_ipv4(void *arg); +void mdns_send_multicast_msg_delayed_ipv4(void *arg); +void mdns_send_unicast_msg_delayed_ipv4(void *arg); +void mdns_start_multicast_timeouts_ipv4(struct netif *netif); +#endif +#if LWIP_IPV6 +void mdns_multicast_timeout_reset_ipv6(void *arg); +void mdns_multicast_probe_timeout_reset_ipv6(void *arg); +void mdns_multicast_timeout_25ttl_reset_ipv6(void *arg); +void mdns_send_multicast_msg_delayed_ipv6(void *arg); +void mdns_send_unicast_msg_delayed_ipv6(void *arg); +void mdns_start_multicast_timeouts_ipv6(struct netif *netif); +#endif +void mdns_prepare_txtdata(struct mdns_service *service); +#ifdef LWIP_MDNS_SEARCH +err_t mdns_send_request(struct mdns_request *req, struct netif *netif, const ip_addr_t *destination); +#endif + +#endif /* LWIP_MDNS_RESPONDER */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_MDNS_OUT_H */ diff --git a/lib/lwip/include/lwip/apps/mdns_priv.h b/lib/lwip/include/lwip/apps/mdns_priv.h new file mode 100644 index 0000000000..5209ba0043 --- /dev/null +++ b/lib/lwip/include/lwip/apps/mdns_priv.h @@ -0,0 +1,237 @@ +/** + * @file + * MDNS responder private definitions + */ + + /* + * Copyright (c) 2015 Verisure Innovation AB + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Ekman erik@kryo.se + * Author: Jasper Verschueren jasper.verschueren@apart-audio.com + * + */ +#ifndef LWIP_HDR_MDNS_PRIV_H +#define LWIP_HDR_MDNS_PRIV_H + +#include "lwip/apps/mdns.h" +#include "lwip/apps/mdns_opts.h" +#include "lwip/pbuf.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_MDNS_RESPONDER + +#define MDNS_READNAME_ERROR 0xFFFF +#define NUM_DOMAIN_OFFSETS 10 + +#define SRV_PRIORITY 0 +#define SRV_WEIGHT 0 + +/* mDNS TTL: (RFC6762 section 10) + * - 120 seconds if the hostname appears somewhere in the RR + * - 75 minutes if not (4500 seconds) + * - 10 seconds if responding to a legacy query + */ +#define MDNS_TTL_10 10 +#define MDNS_TTL_120 120 +#define MDNS_TTL_4500 4500 + +/* RFC6762 section 8.1: If fifteen conflicts occur within any ten-second period, + * then the host MUST wait at least five seconds before each successive + * additional probe attempt. + */ +#define MDNS_PROBE_MAX_CONFLICTS_BEFORE_RATE_LIMIT 15 +#define MDNS_PROBE_MAX_CONFLICTS_TIME_WINDOW 10000 +#define MDNS_PROBE_MAX_CONFLICTS_TIMEOUT 5000 + +#if LWIP_MDNS_SEARCH +/** Description of a search request */ +struct mdns_request { + /** Name of service, like 'myweb' */ + char name[MDNS_LABEL_MAXLEN + 1]; + /** Type of service, like '_http' or '_services._dns-sd' */ + struct mdns_domain service; + /** Callback function called for each response */ + search_result_fn_t result_fn; + void *arg; + /** Protocol, TCP or UDP */ + u16_t proto; + /** Query type (PTR, SRV, ...) */ + u8_t qtype; + /** PTR only request. */ + u16_t only_ptr; +}; +#endif + +/** Description of a service */ +struct mdns_service { + /** TXT record to answer with */ + struct mdns_domain txtdata; + /** Name of service, like 'myweb' */ + char name[MDNS_LABEL_MAXLEN + 1]; + /** Type of service, like '_http' */ + char service[MDNS_LABEL_MAXLEN + 1]; + /** Callback function and userdata + * to update txtdata buffer */ + service_get_txt_fn_t txt_fn; + void *txt_userdata; + /** Protocol, TCP or UDP */ + u16_t proto; + /** Port of the service */ + u16_t port; +}; + +/** mDNS output packet */ +struct mdns_outpacket { + /** Packet data */ + struct pbuf *pbuf; + /** Current write offset in packet */ + u16_t write_offset; + /** Number of questions written */ + u16_t questions; + /** Number of normal answers written */ + u16_t answers; + /** Number of authoritative answers written */ + u16_t authoritative; + /** Number of additional answers written */ + u16_t additional; + /** Offsets for written domain names in packet. + * Used for compression */ + u16_t domain_offsets[NUM_DOMAIN_OFFSETS]; +}; + +/** mDNS output message */ +struct mdns_outmsg { + /** Identifier. Used in legacy queries */ + u16_t tx_id; + /** dns flags */ + u8_t flags; + /** Destination IP/port if sent unicast */ + ip_addr_t dest_addr; + u16_t dest_port; + /** If all answers in packet should set cache_flush bit */ + u8_t cache_flush; + /** If reply should be sent unicast (as requested) */ + u8_t unicast_reply_requested; + /** If legacy query. (tx_id needed, and write + * question again in reply before answer) */ + u8_t legacy_query; + /** If the query is a probe msg we need to respond immediately. Independent of + * the QU or QM flag. */ + u8_t probe_query_recv; + /* Question bitmask for host information */ + u8_t host_questions; + /* Questions bitmask per service */ + u8_t serv_questions[MDNS_MAX_SERVICES]; + /* Reply bitmask for host information */ + u8_t host_replies; + /* Bitmask for which reverse IPv6 hosts to answer */ + u8_t host_reverse_v6_replies; + /* Reply bitmask per service */ + u8_t serv_replies[MDNS_MAX_SERVICES]; +#ifdef LWIP_MDNS_SEARCH + /** Search query to send */ + struct mdns_request *query; +#endif +}; + +/** Delayed msg info */ +struct mdns_delayed_msg { + /** Signals if a multicast msg needs to be send out */ + u8_t multicast_msg_waiting; + /** Multicast timeout for all multicast traffic except probe answers */ + u8_t multicast_timeout; + /** Multicast timeout only for probe answers */ + u8_t multicast_probe_timeout; + /** Output msg used for delayed multicast responses */ + struct mdns_outmsg delayed_msg_multicast; + /** Prefer multicast over unicast timeout -> 25% of TTL = we take 30s as + general delay. */ + u8_t multicast_timeout_25TTL; + /** Only send out new unicast message if previous was send */ + u8_t unicast_msg_in_use; + /** Output msg used for delayed unicast responses */ + struct mdns_outmsg delayed_msg_unicast; +}; + +/* MDNS states */ +typedef enum { + /* MDNS module is off */ + MDNS_STATE_OFF, + /* Waiting before probing can be started */ + MDNS_STATE_PROBE_WAIT, + /* Probing the unique records */ + MDNS_STATE_PROBING, + /* Waiting before announcing the probed unique records */ + MDNS_STATE_ANNOUNCE_WAIT, + /* Announcing all records */ + MDNS_STATE_ANNOUNCING, + /* Probing and announcing completed */ + MDNS_STATE_COMPLETE +} mdns_resp_state_enum_t; + +/** Description of a host/netif */ +struct mdns_host { + /** Hostname */ + char name[MDNS_LABEL_MAXLEN + 1]; + /** Pointer to services */ + struct mdns_service *services[MDNS_MAX_SERVICES]; + /** Number of probes/announces sent for the current name */ + u8_t sent_num; + /** State of the mdns responder */ + mdns_resp_state_enum_t state; +#if LWIP_IPV4 + /** delayed msg struct for IPv4 */ + struct mdns_delayed_msg ipv4; +#endif +#if LWIP_IPV6 + /** delayed msg struct for IPv6 */ + struct mdns_delayed_msg ipv6; +#endif + /** Timestamp of probe conflict saved in list */ + u32_t conflict_time[MDNS_PROBE_MAX_CONFLICTS_BEFORE_RATE_LIMIT]; + /** Rate limit flag */ + u8_t rate_limit_activated; + /** List index for timestamps */ + u8_t index; + /** number of conflicts since startup */ + u8_t num_conflicts; +}; + +struct mdns_host* netif_mdns_data(struct netif *netif); +struct udp_pcb* get_mdns_pcb(void); + +#endif /* LWIP_MDNS_RESPONDER */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_MDNS_PRIV_H */ diff --git a/lib/lwip/include/lwip/apps/mqtt.h b/lib/lwip/include/lwip/apps/mqtt.h new file mode 100644 index 0000000000..bece4005dc --- /dev/null +++ b/lib/lwip/include/lwip/apps/mqtt.h @@ -0,0 +1,205 @@ +/** + * @file + * MQTT client + */ + +/* + * Copyright (c) 2016 Erik Andersson + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Andersson + * + */ +#ifndef LWIP_HDR_APPS_MQTT_CLIENT_H +#define LWIP_HDR_APPS_MQTT_CLIENT_H + +#include "lwip/apps/mqtt_opts.h" +#include "lwip/err.h" +#include "lwip/ip_addr.h" +#include "lwip/prot/iana.h" + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct mqtt_client_s mqtt_client_t; + +#if LWIP_ALTCP && LWIP_ALTCP_TLS +struct altcp_tls_config; +#endif + +/** @ingroup mqtt + * Default MQTT port (non-TLS) */ +#define MQTT_PORT LWIP_IANA_PORT_MQTT +/** @ingroup mqtt + * Default MQTT TLS port */ +#define MQTT_TLS_PORT LWIP_IANA_PORT_SECURE_MQTT + +/*---------------------------------------------------------------------------------------------- */ +/* Connection with server */ + +/** + * @ingroup mqtt + * Client information and connection parameters */ +struct mqtt_connect_client_info_t { + /** Client identifier, must be set by caller */ + const char *client_id; + /** User name, set to NULL if not used */ + const char* client_user; + /** Password, set to NULL if not used */ + const char* client_pass; + /** keep alive time in seconds, 0 to disable keep alive functionality*/ + u16_t keep_alive; + /** will topic, set to NULL if will is not to be used, + will_msg, will_qos and will retain are then ignored */ + const char* will_topic; + /** will_msg, see will_topic */ + const char* will_msg; + /** will_qos, see will_topic */ + u8_t will_qos; + /** will_retain, see will_topic */ + u8_t will_retain; +#if LWIP_ALTCP && LWIP_ALTCP_TLS + /** TLS configuration for secure connections */ + struct altcp_tls_config *tls_config; +#endif +}; + +/** + * @ingroup mqtt + * Connection status codes */ +typedef enum +{ + /** Accepted */ + MQTT_CONNECT_ACCEPTED = 0, + /** Refused protocol version */ + MQTT_CONNECT_REFUSED_PROTOCOL_VERSION = 1, + /** Refused identifier */ + MQTT_CONNECT_REFUSED_IDENTIFIER = 2, + /** Refused server */ + MQTT_CONNECT_REFUSED_SERVER = 3, + /** Refused user credentials */ + MQTT_CONNECT_REFUSED_USERNAME_PASS = 4, + /** Refused not authorized */ + MQTT_CONNECT_REFUSED_NOT_AUTHORIZED_ = 5, + /** Disconnected */ + MQTT_CONNECT_DISCONNECTED = 256, + /** Timeout */ + MQTT_CONNECT_TIMEOUT = 257 +} mqtt_connection_status_t; + +/** + * @ingroup mqtt + * Function prototype for mqtt connection status callback. Called when + * client has connected to the server after initiating a mqtt connection attempt by + * calling mqtt_client_connect() or when connection is closed by server or an error + * + * @param client MQTT client itself + * @param arg Additional argument to pass to the callback function + * @param status Connect result code or disconnection notification @see mqtt_connection_status_t + * + */ +typedef void (*mqtt_connection_cb_t)(mqtt_client_t *client, void *arg, mqtt_connection_status_t status); + + +/** + * @ingroup mqtt + * Data callback flags */ +enum { + /** Flag set when last fragment of data arrives in data callback */ + MQTT_DATA_FLAG_LAST = 1 +}; + +/** + * @ingroup mqtt + * Function prototype for MQTT incoming publish data callback function. Called when data + * arrives to a subscribed topic @see mqtt_subscribe + * + * @param arg Additional argument to pass to the callback function + * @param data User data, pointed object, data may not be referenced after callback return, + NULL is passed when all publish data are delivered + * @param len Length of publish data fragment + * @param flags MQTT_DATA_FLAG_LAST set when this call contains the last part of data from publish message + * + */ +typedef void (*mqtt_incoming_data_cb_t)(void *arg, const u8_t *data, u16_t len, u8_t flags); + + +/** + * @ingroup mqtt + * Function prototype for MQTT incoming publish function. Called when an incoming publish + * arrives to a subscribed topic @see mqtt_subscribe + * + * @param arg Additional argument to pass to the callback function + * @param topic Zero terminated Topic text string, topic may not be referenced after callback return + * @param tot_len Total length of publish data, if set to 0 (no publish payload) data callback will not be invoked + */ +typedef void (*mqtt_incoming_publish_cb_t)(void *arg, const char *topic, u32_t tot_len); + + +/** + * @ingroup mqtt + * Function prototype for mqtt request callback. Called when a subscribe, unsubscribe + * or publish request has completed + * @param arg Pointer to user data supplied when invoking request + * @param err ERR_OK on success + * ERR_TIMEOUT if no response was received within timeout, + * ERR_ABRT if (un)subscribe was denied + */ +typedef void (*mqtt_request_cb_t)(void *arg, err_t err); + + +err_t mqtt_client_connect(mqtt_client_t *client, const ip_addr_t *ipaddr, u16_t port, mqtt_connection_cb_t cb, void *arg, + const struct mqtt_connect_client_info_t *client_info); + +void mqtt_disconnect(mqtt_client_t *client); + +mqtt_client_t *mqtt_client_new(void); +void mqtt_client_free(mqtt_client_t* client); + +u8_t mqtt_client_is_connected(mqtt_client_t *client); + +void mqtt_set_inpub_callback(mqtt_client_t *client, mqtt_incoming_publish_cb_t pub_cb, + mqtt_incoming_data_cb_t data_cb, void *arg); + +err_t mqtt_sub_unsub(mqtt_client_t *client, const char *topic, u8_t qos, mqtt_request_cb_t cb, void *arg, u8_t sub); + +/** @ingroup mqtt + *Subscribe to topic */ +#define mqtt_subscribe(client, topic, qos, cb, arg) mqtt_sub_unsub(client, topic, qos, cb, arg, 1) +/** @ingroup mqtt + * Unsubscribe to topic */ +#define mqtt_unsubscribe(client, topic, cb, arg) mqtt_sub_unsub(client, topic, 0, cb, arg, 0) + +err_t mqtt_publish(mqtt_client_t *client, const char *topic, const void *payload, u16_t payload_length, u8_t qos, u8_t retain, + mqtt_request_cb_t cb, void *arg); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_MQTT_CLIENT_H */ diff --git a/lib/lwip/include/lwip/apps/mqtt_opts.h b/lib/lwip/include/lwip/apps/mqtt_opts.h new file mode 100644 index 0000000000..4226d21e84 --- /dev/null +++ b/lib/lwip/include/lwip/apps/mqtt_opts.h @@ -0,0 +1,103 @@ +/** + * @file + * MQTT client options + */ + +/* + * Copyright (c) 2016 Erik Andersson + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Andersson + * + */ +#ifndef LWIP_HDR_APPS_MQTT_OPTS_H +#define LWIP_HDR_APPS_MQTT_OPTS_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @defgroup mqtt_opts Options + * @ingroup mqtt + * @{ + */ + +/** + * Output ring-buffer size, must be able to fit largest outgoing publish message topic+payloads + */ +#ifndef MQTT_OUTPUT_RINGBUF_SIZE +#define MQTT_OUTPUT_RINGBUF_SIZE 256 +#endif + +/** + * Number of bytes in receive buffer, must be at least the size of the longest incoming topic + 8 + * If one wants to avoid fragmented incoming publish, set length to max incoming topic length + max payload length + 8 + */ +#ifndef MQTT_VAR_HEADER_BUFFER_LEN +#define MQTT_VAR_HEADER_BUFFER_LEN 128 +#endif + +/** + * Maximum number of pending subscribe, unsubscribe and publish requests to server . + */ +#ifndef MQTT_REQ_MAX_IN_FLIGHT +#define MQTT_REQ_MAX_IN_FLIGHT 4 +#endif + +/** + * Seconds between each cyclic timer call. + */ +#ifndef MQTT_CYCLIC_TIMER_INTERVAL +#define MQTT_CYCLIC_TIMER_INTERVAL 5 +#endif + +/** + * Publish, subscribe and unsubscribe request timeout in seconds. + */ +#ifndef MQTT_REQ_TIMEOUT +#define MQTT_REQ_TIMEOUT 30 +#endif + +/** + * Seconds for MQTT connect response timeout after sending connect request + */ +#ifndef MQTT_CONNECT_TIMOUT +#define MQTT_CONNECT_TIMOUT 100 +#endif + +/** + * @} + */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_MQTT_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/mqtt_priv.h b/lib/lwip/include/lwip/apps/mqtt_priv.h new file mode 100644 index 0000000000..b775913cac --- /dev/null +++ b/lib/lwip/include/lwip/apps/mqtt_priv.h @@ -0,0 +1,104 @@ +/** + * @file + * MQTT client (private interface) + */ + +/* + * Copyright (c) 2016 Erik Andersson + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Andersson + * + */ +#ifndef LWIP_HDR_APPS_MQTT_PRIV_H +#define LWIP_HDR_APPS_MQTT_PRIV_H + +#include "lwip/apps/mqtt.h" +#include "lwip/altcp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** Pending request item, binds application callback to pending server requests */ +struct mqtt_request_t +{ + /** Next item in list, NULL means this is the last in chain, + next pointing at itself means request is unallocated */ + struct mqtt_request_t *next; + /** Callback to upper layer */ + mqtt_request_cb_t cb; + void *arg; + /** MQTT packet identifier */ + u16_t pkt_id; + /** Expire time relative to element before this */ + u16_t timeout_diff; +}; + +/** Ring buffer */ +struct mqtt_ringbuf_t { + u16_t put; + u16_t get; + u8_t buf[MQTT_OUTPUT_RINGBUF_SIZE]; +}; + +/** MQTT client */ +struct mqtt_client_s +{ + /** Timers and timeouts */ + u16_t cyclic_tick; + u16_t keep_alive; + u16_t server_watchdog; + /** Packet identifier generator*/ + u16_t pkt_id_seq; + /** Packet identifier of pending incoming publish */ + u16_t inpub_pkt_id; + /** Connection state */ + u8_t conn_state; + struct altcp_pcb *conn; + /** Connection callback */ + void *connect_arg; + mqtt_connection_cb_t connect_cb; + /** Pending requests to server */ + struct mqtt_request_t *pend_req_queue; + struct mqtt_request_t req_list[MQTT_REQ_MAX_IN_FLIGHT]; + void *inpub_arg; + /** Incoming data callback */ + mqtt_incoming_data_cb_t data_cb; + mqtt_incoming_publish_cb_t pub_cb; + /** Input */ + u32_t msg_idx; + u8_t rx_buffer[MQTT_VAR_HEADER_BUFFER_LEN]; + /** Output ring-buffer */ + struct mqtt_ringbuf_t output; +}; + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_MQTT_PRIV_H */ diff --git a/lib/lwip/include/lwip/apps/netbiosns.h b/lib/lwip/include/lwip/apps/netbiosns.h new file mode 100644 index 0000000000..a326d33b11 --- /dev/null +++ b/lib/lwip/include/lwip/apps/netbiosns.h @@ -0,0 +1,51 @@ +/** + * @file + * NETBIOS name service responder + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ +#ifndef LWIP_HDR_APPS_NETBIOS_H +#define LWIP_HDR_APPS_NETBIOS_H + +#include "lwip/apps/netbiosns_opts.h" + +#ifdef __cplusplus +extern "C" { +#endif + +void netbiosns_init(void); +#ifndef NETBIOS_LWIP_NAME +void netbiosns_set_name(const char* hostname); +#endif +void netbiosns_stop(void); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_NETBIOS_H */ diff --git a/lib/lwip/include/lwip/apps/netbiosns_opts.h b/lib/lwip/include/lwip/apps/netbiosns_opts.h new file mode 100644 index 0000000000..cc0da9523d --- /dev/null +++ b/lib/lwip/include/lwip/apps/netbiosns_opts.h @@ -0,0 +1,66 @@ +/** + * @file + * NETBIOS name service responder options + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ +#ifndef LWIP_HDR_APPS_NETBIOS_OPTS_H +#define LWIP_HDR_APPS_NETBIOS_OPTS_H + +#include "lwip/opt.h" + +/** + * @defgroup netbiosns_opts Options + * @ingroup netbiosns + * @{ + */ + +/** NetBIOS name of lwip device + * This must be uppercase until NETBIOS_STRCMP() is defined to a string + * comparison function that is case insensitive. + * If you want to use the netif's hostname, use this (with LWIP_NETIF_HOSTNAME): + * (ip_current_netif() != NULL ? ip_current_netif()->hostname != NULL ? ip_current_netif()->hostname : "" : "") + * + * If this is not defined, netbiosns_set_name() can be called at runtime to change the name. + */ +#ifdef __DOXYGEN__ +#define NETBIOS_LWIP_NAME "NETBIOSLWIPDEV" +#endif + +/** Respond to NetBIOS name queries + * Default is disabled + */ +#if !defined LWIP_NETBIOS_RESPOND_NAME_QUERY || defined __DOXYGEN__ +#define LWIP_NETBIOS_RESPOND_NAME_QUERY 0 +#endif + +/** + * @} + */ + +#endif /* LWIP_HDR_APPS_NETBIOS_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/smtp.h b/lib/lwip/include/lwip/apps/smtp.h new file mode 100644 index 0000000000..fb4a4a7cca --- /dev/null +++ b/lib/lwip/include/lwip/apps/smtp.h @@ -0,0 +1,128 @@ +#ifndef LWIP_HDR_APPS_SMTP_H +#define LWIP_HDR_APPS_SMTP_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include "lwip/apps/smtp_opts.h" +#include "lwip/err.h" +#include "lwip/prot/iana.h" + +/** The default TCP port used for SMTP */ +#define SMTP_DEFAULT_PORT LWIP_IANA_PORT_SMTP +/** The default TCP port used for SMTPS */ +#define SMTPS_DEFAULT_PORT LWIP_IANA_PORT_SMTPS + +/** Email successfully sent */ +#define SMTP_RESULT_OK 0 +/** Unknown error */ +#define SMTP_RESULT_ERR_UNKNOWN 1 +/** Connection to server failed */ +#define SMTP_RESULT_ERR_CONNECT 2 +/** Failed to resolve server hostname */ +#define SMTP_RESULT_ERR_HOSTNAME 3 +/** Connection unexpectedly closed by remote server */ +#define SMTP_RESULT_ERR_CLOSED 4 +/** Connection timed out (server didn't respond in time) */ +#define SMTP_RESULT_ERR_TIMEOUT 5 +/** Server responded with an unknown response code */ +#define SMTP_RESULT_ERR_SVR_RESP 6 +/** Out of resources locally */ +#define SMTP_RESULT_ERR_MEM 7 + +/** Prototype of an smtp callback function + * + * @param arg argument specified when initiating the email + * @param smtp_result result of the mail transfer (see defines SMTP_RESULT_*) + * @param srv_err if aborted by the server, this contains the error code received + * @param err an error returned by internal lwip functions, can help to specify + * the source of the error but must not necessarily be != ERR_OK + */ +typedef void (*smtp_result_fn)(void *arg, u8_t smtp_result, u16_t srv_err, err_t err); + +/** This structure is used as argument for smtp_send_mail_int(), + * which in turn can be used with tcpip_callback() to send mail + * from interrupt context, e.g. like this: + * struct smtp_send_request *req; (to be filled) + * tcpip_try_callback(smtp_send_mail_int, (void*)req); + * + * For member description, see parameter description of smtp_send_mail(). + * When using with tcpip_callback, this structure has to stay allocated + * (e.g. using mem_malloc/mem_free) until its 'callback_fn' is called. + */ +struct smtp_send_request { + const char *from; + const char* to; + const char* subject; + const char* body; + smtp_result_fn callback_fn; + void* callback_arg; + /** If this is != 0, data is *not* copied into an extra buffer + * but used from the pointers supplied in this struct. + * This means less memory usage, but data must stay untouched until + * the callback function is called. */ + u8_t static_data; +}; + + +#if SMTP_BODYDH + +#ifndef SMTP_BODYDH_BUFFER_SIZE +#define SMTP_BODYDH_BUFFER_SIZE 256 +#endif /* SMTP_BODYDH_BUFFER_SIZE */ + +struct smtp_bodydh { + u16_t state; + u16_t length; /* Length of content in buffer */ + char buffer[SMTP_BODYDH_BUFFER_SIZE]; /* buffer for generated content */ +#ifdef SMTP_BODYDH_USER_SIZE + u8_t user[SMTP_BODYDH_USER_SIZE]; +#endif /* SMTP_BODYDH_USER_SIZE */ +}; + +enum bdh_retvals_e { + BDH_DONE = 0, + BDH_WORKING +}; + +/** Prototype of an smtp body callback function + * It receives a struct smtp_bodydh, and a buffer to write data, + * must return BDH_WORKING to be called again and BDH_DONE when + * it has finished processing. This one tries to fill one TCP buffer with + * data, your function will be repeatedly called until that happens; so if you + * know you'll be taking too long to serve your request, pause once in a while + * by writing length=0 to avoid hogging system resources + * + * @param arg argument specified when initiating the email + * @param smtp_bodydh state handling + buffer structure + */ +typedef int (*smtp_bodycback_fn)(void *arg, struct smtp_bodydh *bodydh); + +err_t smtp_send_mail_bodycback(const char *from, const char* to, const char* subject, + smtp_bodycback_fn bodycback_fn, smtp_result_fn callback_fn, void* callback_arg); + +#endif /* SMTP_BODYDH */ + + +err_t smtp_set_server_addr(const char* server); +void smtp_set_server_port(u16_t port); +#if LWIP_ALTCP && LWIP_ALTCP_TLS +struct altcp_tls_config; +void smtp_set_tls_config(struct altcp_tls_config *tls_config); +#endif +err_t smtp_set_auth(const char* username, const char* pass); +err_t smtp_send_mail(const char *from, const char* to, const char* subject, const char* body, + smtp_result_fn callback_fn, void* callback_arg); +err_t smtp_send_mail_static(const char *from, const char* to, const char* subject, const char* body, + smtp_result_fn callback_fn, void* callback_arg); +void smtp_send_mail_int(void *arg); +#ifdef LWIP_DEBUG +const char* smtp_result_str(u8_t smtp_result); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_SMTP_H */ diff --git a/lib/lwip/include/lwip/apps/smtp_opts.h b/lib/lwip/include/lwip/apps/smtp_opts.h new file mode 100644 index 0000000000..c588fb9d5e --- /dev/null +++ b/lib/lwip/include/lwip/apps/smtp_opts.h @@ -0,0 +1,80 @@ +#ifndef LWIP_HDR_APPS_SMTP_OPTS_H +#define LWIP_HDR_APPS_SMTP_OPTS_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @defgroup smtp_opts Options + * @ingroup smtp + * + * @{ + */ + +/** Set this to 1 to enable data handler callback on BODY */ +#ifndef SMTP_BODYDH +#define SMTP_BODYDH 0 +#endif + +/** SMTP_DEBUG: Enable debugging for SNTP. */ +#ifndef SMTP_DEBUG +#define SMTP_DEBUG LWIP_DBG_OFF +#endif + +/** Maximum length reserved for server name including terminating 0 byte */ +#ifndef SMTP_MAX_SERVERNAME_LEN +#define SMTP_MAX_SERVERNAME_LEN 256 +#endif + +/** Maximum length reserved for username */ +#ifndef SMTP_MAX_USERNAME_LEN +#define SMTP_MAX_USERNAME_LEN 32 +#endif + +/** Maximum length reserved for password */ +#ifndef SMTP_MAX_PASS_LEN +#define SMTP_MAX_PASS_LEN 32 +#endif + +/** Set this to 0 if you know the authentication data will not change + * during the smtp session, which saves some heap space. */ +#ifndef SMTP_COPY_AUTHDATA +#define SMTP_COPY_AUTHDATA 1 +#endif + +/** Set this to 0 to save some code space if you know for sure that all data + * passed to this module conforms to the requirements in the SMTP RFC. + * WARNING: use this with care! + */ +#ifndef SMTP_CHECK_DATA +#define SMTP_CHECK_DATA 1 +#endif + +/** Set this to 1 to enable AUTH PLAIN support */ +#ifndef SMTP_SUPPORT_AUTH_PLAIN +#define SMTP_SUPPORT_AUTH_PLAIN 1 +#endif + +/** Set this to 1 to enable AUTH LOGIN support */ +#ifndef SMTP_SUPPORT_AUTH_LOGIN +#define SMTP_SUPPORT_AUTH_LOGIN 1 +#endif + +/* Memory allocation/deallocation can be overridden... */ +#ifndef SMTP_STATE_MALLOC +#define SMTP_STATE_MALLOC(size) mem_malloc(size) +#define SMTP_STATE_FREE(ptr) mem_free(ptr) +#endif + +/** + * @} + */ + +#ifdef __cplusplus +} +#endif + +#endif /* SMTP_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/snmp.h b/lib/lwip/include/lwip/apps/snmp.h new file mode 100644 index 0000000000..dc5bb0d05e --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp.h @@ -0,0 +1,145 @@ +/** + * @file + * SNMP server main API - start and basic configuration + */ + +/* + * Copyright (c) 2001, 2002 Leon Woestenberg leon.woestenberg@axon.tv + * Copyright (c) 2001, 2002 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Leon Woestenberg leon.woestenberg@axon.tv + * Martin Hentschel info@cl-soft.de + * + */ +#ifndef LWIP_HDR_APPS_SNMP_H +#define LWIP_HDR_APPS_SNMP_H + +#include "lwip/apps/snmp_opts.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/err.h" +#include "lwip/apps/snmp_core.h" + +/** SNMP variable binding descriptor (publicly needed for traps) */ +struct snmp_varbind +{ + /** pointer to next varbind, NULL for last in list */ + struct snmp_varbind *next; + /** pointer to previous varbind, NULL for first in list */ + struct snmp_varbind *prev; + + /** object identifier */ + struct snmp_obj_id oid; + + /** value ASN1 type */ + u8_t type; + /** object value length */ + u16_t value_len; + /** object value */ + void *value; +}; + +/** + * @ingroup snmp_core + * Agent setup, start listening to port 161. + */ +void snmp_init(void); +void snmp_set_mibs(const struct snmp_mib **mibs, u8_t num_mibs); + +void snmp_set_device_enterprise_oid(const struct snmp_obj_id* device_enterprise_oid); +const struct snmp_obj_id* snmp_get_device_enterprise_oid(void); + +void snmp_trap_dst_enable(u8_t dst_idx, u8_t enable); +void snmp_trap_dst_ip_set(u8_t dst_idx, const ip_addr_t *dst); + +/** Generic trap: cold start */ +#define SNMP_GENTRAP_COLDSTART 0 +/** Generic trap: warm start */ +#define SNMP_GENTRAP_WARMSTART 1 +/** Generic trap: link down */ +#define SNMP_GENTRAP_LINKDOWN 2 +/** Generic trap: link up */ +#define SNMP_GENTRAP_LINKUP 3 +/** Generic trap: authentication failure */ +#define SNMP_GENTRAP_AUTH_FAILURE 4 +/** Generic trap: EGP neighbor lost */ +#define SNMP_GENTRAP_EGP_NEIGHBOR_LOSS 5 +/** Generic trap: enterprise specific */ +#define SNMP_GENTRAP_ENTERPRISE_SPECIFIC 6 + +err_t snmp_send_trap_generic(s32_t generic_trap); +err_t snmp_send_trap_specific(s32_t specific_trap, struct snmp_varbind *varbinds); +err_t snmp_send_trap(const struct snmp_obj_id* oid, s32_t generic_trap, s32_t specific_trap, struct snmp_varbind *varbinds); + +err_t snmp_send_inform_generic(s32_t generic_trap, struct snmp_varbind *varbinds, s32_t *ptr_request_id); +err_t snmp_send_inform_specific(s32_t specific_trap, struct snmp_varbind *varbinds, s32_t *ptr_request_id); +err_t snmp_send_inform(const struct snmp_obj_id* oid, s32_t generic_trap, s32_t specific_trap, struct snmp_varbind *varbinds, s32_t *ptr_request_id); +struct snmp_request; +typedef void (*snmp_inform_callback_fct)(struct snmp_request *request, void* callback_arg); +void snmp_set_inform_callback(snmp_inform_callback_fct inform_callback, void* callback_arg); + +void snmp_set_default_trap_version(u8_t snmp_version); +u8_t snmp_get_default_trap_version(void); + +#define SNMP_AUTH_TRAPS_DISABLED 0 +#define SNMP_AUTH_TRAPS_ENABLED 1 +void snmp_set_auth_traps_enabled(u8_t enable); +u8_t snmp_get_auth_traps_enabled(void); + +u8_t snmp_v1_enabled(void); +u8_t snmp_v2c_enabled(void); +u8_t snmp_v3_enabled(void); +void snmp_v1_enable(u8_t enable); +void snmp_v2c_enable(u8_t enable); +void snmp_v3_enable(u8_t enable); + +const char * snmp_get_community(void); +const char * snmp_get_community_write(void); +const char * snmp_get_community_trap(void); +void snmp_set_community(const char * const community); +void snmp_set_community_write(const char * const community); +void snmp_set_community_trap(const char * const community); + +void snmp_coldstart_trap(void); +void snmp_authfail_trap(void); + +typedef void (*snmp_write_callback_fct)(const u32_t* oid, u8_t oid_len, void* callback_arg); +void snmp_set_write_callback(snmp_write_callback_fct write_callback, void* callback_arg); + +#endif /* LWIP_SNMP */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_SNMP_H */ diff --git a/lib/lwip/include/lwip/apps/snmp_core.h b/lib/lwip/include/lwip/apps/snmp_core.h new file mode 100644 index 0000000000..5a8a49f8d2 --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp_core.h @@ -0,0 +1,377 @@ +/** + * @file + * SNMP core API for implementing MIBs + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Christiaan Simons christiaan.simons@axon.tv + * Martin Hentschel info@cl-soft.de + */ + +#ifndef LWIP_HDR_APPS_SNMP_CORE_H +#define LWIP_HDR_APPS_SNMP_CORE_H + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/ip_addr.h" +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* basic ASN1 defines */ +#define SNMP_ASN1_CLASS_UNIVERSAL 0x00 +#define SNMP_ASN1_CLASS_APPLICATION 0x40 +#define SNMP_ASN1_CLASS_CONTEXT 0x80 +#define SNMP_ASN1_CLASS_PRIVATE 0xC0 + +#define SNMP_ASN1_CONTENTTYPE_PRIMITIVE 0x00 +#define SNMP_ASN1_CONTENTTYPE_CONSTRUCTED 0x20 + +/* universal tags (from ASN.1 spec.) */ +#define SNMP_ASN1_UNIVERSAL_END_OF_CONTENT 0 +#define SNMP_ASN1_UNIVERSAL_INTEGER 2 +#define SNMP_ASN1_UNIVERSAL_OCTET_STRING 4 +#define SNMP_ASN1_UNIVERSAL_NULL 5 +#define SNMP_ASN1_UNIVERSAL_OBJECT_ID 6 +#define SNMP_ASN1_UNIVERSAL_SEQUENCE_OF 16 + +/* application specific (SNMP) tags (from SNMPv2-SMI) */ +#define SNMP_ASN1_APPLICATION_IPADDR 0 /* [APPLICATION 0] IMPLICIT OCTET STRING (SIZE (4)) */ +#define SNMP_ASN1_APPLICATION_COUNTER 1 /* [APPLICATION 1] IMPLICIT INTEGER (0..4294967295) => u32_t */ +#define SNMP_ASN1_APPLICATION_GAUGE 2 /* [APPLICATION 2] IMPLICIT INTEGER (0..4294967295) => u32_t */ +#define SNMP_ASN1_APPLICATION_TIMETICKS 3 /* [APPLICATION 3] IMPLICIT INTEGER (0..4294967295) => u32_t */ +#define SNMP_ASN1_APPLICATION_OPAQUE 4 /* [APPLICATION 4] IMPLICIT OCTET STRING */ +#define SNMP_ASN1_APPLICATION_COUNTER64 6 /* [APPLICATION 6] IMPLICIT INTEGER (0..18446744073709551615) */ + +/* context specific (SNMP) tags (from RFC 1905) */ +#define SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_INSTANCE 1 + +/* full ASN1 type defines */ +#define SNMP_ASN1_TYPE_END_OF_CONTENT (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_END_OF_CONTENT) +#define SNMP_ASN1_TYPE_INTEGER (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_INTEGER) +#define SNMP_ASN1_TYPE_OCTET_STRING (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_OCTET_STRING) +#define SNMP_ASN1_TYPE_NULL (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_NULL) +#define SNMP_ASN1_TYPE_OBJECT_ID (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_OBJECT_ID) +#define SNMP_ASN1_TYPE_SEQUENCE (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_UNIVERSAL_SEQUENCE_OF) +#define SNMP_ASN1_TYPE_IPADDR (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_IPADDR) +#define SNMP_ASN1_TYPE_IPADDRESS SNMP_ASN1_TYPE_IPADDR +#define SNMP_ASN1_TYPE_COUNTER (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_COUNTER) +#define SNMP_ASN1_TYPE_COUNTER32 SNMP_ASN1_TYPE_COUNTER +#define SNMP_ASN1_TYPE_GAUGE (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_GAUGE) +#define SNMP_ASN1_TYPE_GAUGE32 SNMP_ASN1_TYPE_GAUGE +#define SNMP_ASN1_TYPE_UNSIGNED32 SNMP_ASN1_TYPE_GAUGE +#define SNMP_ASN1_TYPE_TIMETICKS (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_TIMETICKS) +#define SNMP_ASN1_TYPE_OPAQUE (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_OPAQUE) +#if LWIP_HAVE_INT64 +#define SNMP_ASN1_TYPE_COUNTER64 (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_COUNTER64) +#endif + +#define SNMP_VARBIND_EXCEPTION_OFFSET 0xF0 +#define SNMP_VARBIND_EXCEPTION_MASK 0x0F + +/** error codes predefined by SNMP prot. */ +typedef enum { + SNMP_ERR_NOERROR = 0, +/* +outdated v1 error codes. do not use anmore! +#define SNMP_ERR_NOSUCHNAME 2 use SNMP_ERR_NOSUCHINSTANCE instead +#define SNMP_ERR_BADVALUE 3 use SNMP_ERR_WRONGTYPE,SNMP_ERR_WRONGLENGTH,SNMP_ERR_WRONGENCODING or SNMP_ERR_WRONGVALUE instead +#define SNMP_ERR_READONLY 4 use SNMP_ERR_NOTWRITABLE instead +*/ + SNMP_ERR_GENERROR = 5, + SNMP_ERR_NOACCESS = 6, + SNMP_ERR_WRONGTYPE = 7, + SNMP_ERR_WRONGLENGTH = 8, + SNMP_ERR_WRONGENCODING = 9, + SNMP_ERR_WRONGVALUE = 10, + SNMP_ERR_NOCREATION = 11, + SNMP_ERR_INCONSISTENTVALUE = 12, + SNMP_ERR_RESOURCEUNAVAILABLE = 13, + SNMP_ERR_COMMITFAILED = 14, + SNMP_ERR_UNDOFAILED = 15, + SNMP_ERR_NOTWRITABLE = 17, + SNMP_ERR_INCONSISTENTNAME = 18, + + SNMP_ERR_NOSUCHINSTANCE = SNMP_VARBIND_EXCEPTION_OFFSET + SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_INSTANCE +} snmp_err_t; + +/** internal object identifier representation */ +struct snmp_obj_id +{ + u8_t len; + u32_t id[SNMP_MAX_OBJ_ID_LEN]; +}; + +struct snmp_obj_id_const_ref +{ + u8_t len; + const u32_t* id; +}; + +extern const struct snmp_obj_id_const_ref snmp_zero_dot_zero; /* administrative identifier from SNMPv2-SMI */ + +/** SNMP variant value, used as reference in struct snmp_node_instance and table implementation */ +union snmp_variant_value +{ + void* ptr; + const void* const_ptr; + u32_t u32; + s32_t s32; +#if LWIP_HAVE_INT64 + u64_t u64; +#endif +}; + + +/** +SNMP MIB node types + tree node is the only node the stack can process in order to walk the tree, + all other nodes are assumed to be leaf nodes. + This cannot be an enum because users may want to define their own node types. +*/ +#define SNMP_NODE_TREE 0x00 +/* predefined leaf node types */ +#define SNMP_NODE_SCALAR 0x01 +#define SNMP_NODE_SCALAR_ARRAY 0x02 +#define SNMP_NODE_TABLE 0x03 +#define SNMP_NODE_THREADSYNC 0x04 + +/** node "base class" layout, the mandatory fields for a node */ +struct snmp_node +{ + /** one out of SNMP_NODE_TREE or any leaf node type (like SNMP_NODE_SCALAR) */ + u8_t node_type; + /** the number assigned to this node which used as part of the full OID */ + u32_t oid; +}; + +/** SNMP node instance access types */ +typedef enum { + SNMP_NODE_INSTANCE_ACCESS_READ = 1, + SNMP_NODE_INSTANCE_ACCESS_WRITE = 2, + SNMP_NODE_INSTANCE_READ_ONLY = SNMP_NODE_INSTANCE_ACCESS_READ, + SNMP_NODE_INSTANCE_READ_WRITE = (SNMP_NODE_INSTANCE_ACCESS_READ | SNMP_NODE_INSTANCE_ACCESS_WRITE), + SNMP_NODE_INSTANCE_WRITE_ONLY = SNMP_NODE_INSTANCE_ACCESS_WRITE, + SNMP_NODE_INSTANCE_NOT_ACCESSIBLE = 0 +} snmp_access_t; + +struct snmp_node_instance; + +typedef s16_t (*node_instance_get_value_method)(struct snmp_node_instance*, void*); +typedef snmp_err_t (*node_instance_set_test_method)(struct snmp_node_instance*, u16_t, void*); +typedef snmp_err_t (*node_instance_set_value_method)(struct snmp_node_instance*, u16_t, void*); +typedef void (*node_instance_release_method)(struct snmp_node_instance*); + +#define SNMP_GET_VALUE_RAW_DATA 0x4000 /* do not use 0x8000 because return value of node_instance_get_value_method is signed16 and 0x8000 would be the signed bit */ + +/** SNMP node instance */ +struct snmp_node_instance +{ + /** prefilled with the node, get_instance() is called on; may be changed by user to any value to pass an arbitrary node between calls to get_instance() and get_value/test_value/set_value */ + const struct snmp_node* node; + /** prefilled with the instance id requested; for get_instance() this is the exact oid requested; for get_next_instance() this is the relative starting point, stack expects relative oid of next node here */ + struct snmp_obj_id instance_oid; + + /** ASN type for this object (see snmp_asn1.h for definitions) */ + u8_t asn1_type; + /** one out of instance access types defined above (SNMP_NODE_INSTANCE_READ_ONLY,...) */ + snmp_access_t access; + + /** returns object value for the given object identifier. Return values <0 to indicate an error */ + node_instance_get_value_method get_value; + /** tests length and/or range BEFORE setting */ + node_instance_set_test_method set_test; + /** sets object value, only called when set_test() was successful */ + node_instance_set_value_method set_value; + /** called in any case when the instance is not required anymore by stack (useful for freeing memory allocated in get_instance/get_next_instance methods) */ + node_instance_release_method release_instance; + + /** reference to pass arbitrary value between calls to get_instance() and get_value/test_value/set_value */ + union snmp_variant_value reference; + /** see reference (if reference is a pointer, the length of underlying data may be stored here or anything else) */ + u32_t reference_len; +}; + + +/** SNMP tree node */ +struct snmp_tree_node +{ + /** inherited "base class" members */ + struct snmp_node node; + u16_t subnode_count; + const struct snmp_node* const *subnodes; +}; + +#define SNMP_CREATE_TREE_NODE(oid, subnodes) \ + {{ SNMP_NODE_TREE, (oid) }, \ + (u16_t)LWIP_ARRAYSIZE(subnodes), (subnodes) } + +#define SNMP_CREATE_EMPTY_TREE_NODE(oid) \ + {{ SNMP_NODE_TREE, (oid) }, \ + 0, NULL } + +/** SNMP leaf node */ +struct snmp_leaf_node +{ + /** inherited "base class" members */ + struct snmp_node node; + snmp_err_t (*get_instance)(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); + snmp_err_t (*get_next_instance)(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); +}; + +/** represents a single mib with its base oid and root node */ +struct snmp_mib +{ + const u32_t *base_oid; + u8_t base_oid_len; + const struct snmp_node *root_node; +}; + +#define SNMP_MIB_CREATE(oid_list, root_node) { (oid_list), (u8_t)LWIP_ARRAYSIZE(oid_list), root_node } + +/** OID range structure */ +struct snmp_oid_range +{ + u32_t min; + u32_t max; +}; + +/** checks if incoming OID length and values are in allowed ranges */ +u8_t snmp_oid_in_range(const u32_t *oid_in, u8_t oid_len, const struct snmp_oid_range *oid_ranges, u8_t oid_ranges_len); + +typedef enum { + SNMP_NEXT_OID_STATUS_SUCCESS, + SNMP_NEXT_OID_STATUS_NO_MATCH, + SNMP_NEXT_OID_STATUS_BUF_TO_SMALL +} snmp_next_oid_status_t; + +/** state for next_oid_init / next_oid_check functions */ +struct snmp_next_oid_state +{ + const u32_t* start_oid; + u8_t start_oid_len; + + u32_t* next_oid; + u8_t next_oid_len; + u8_t next_oid_max_len; + + snmp_next_oid_status_t status; + void* reference; +}; + +void snmp_next_oid_init(struct snmp_next_oid_state *state, + const u32_t *start_oid, u8_t start_oid_len, + u32_t *next_oid_buf, u8_t next_oid_max_len); +u8_t snmp_next_oid_precheck(struct snmp_next_oid_state *state, const u32_t *oid, u8_t oid_len); +u8_t snmp_next_oid_check(struct snmp_next_oid_state *state, const u32_t *oid, u8_t oid_len, void* reference); + +void snmp_oid_assign(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len); +void snmp_oid_combine(struct snmp_obj_id* target, const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len); +void snmp_oid_prefix(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len); +void snmp_oid_append(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len); +u8_t snmp_oid_equal(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len); +s8_t snmp_oid_compare(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len); + +#if LWIP_IPV4 +u8_t snmp_oid_to_ip4(const u32_t *oid, ip4_addr_t *ip); +void snmp_ip4_to_oid(const ip4_addr_t *ip, u32_t *oid); +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 +u8_t snmp_oid_to_ip6(const u32_t *oid, ip6_addr_t *ip); +void snmp_ip6_to_oid(const ip6_addr_t *ip, u32_t *oid); +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 || LWIP_IPV6 +u8_t snmp_ip_to_oid(const ip_addr_t *ip, u32_t *oid); +u8_t snmp_ip_port_to_oid(const ip_addr_t *ip, u16_t port, u32_t *oid); + +u8_t snmp_oid_to_ip(const u32_t *oid, u8_t oid_len, ip_addr_t *ip); +u8_t snmp_oid_to_ip_port(const u32_t *oid, u8_t oid_len, ip_addr_t *ip, u16_t *port); +#endif /* LWIP_IPV4 || LWIP_IPV6 */ + +struct netif; +u8_t netif_to_num(const struct netif *netif); + +snmp_err_t snmp_set_test_ok(struct snmp_node_instance* instance, u16_t value_len, void* value); /* generic function which can be used if test is always successful */ + +err_t snmp_decode_bits(const u8_t *buf, u32_t buf_len, u32_t *bit_value); +err_t snmp_decode_truthvalue(const s32_t *asn1_value, u8_t *bool_value); +u8_t snmp_encode_bits(u8_t *buf, u32_t buf_len, u32_t bit_value, u8_t bit_count); +u8_t snmp_encode_truthvalue(s32_t *asn1_value, u32_t bool_value); + +struct snmp_statistics +{ + u32_t inpkts; + u32_t outpkts; + u32_t inbadversions; + u32_t inbadcommunitynames; + u32_t inbadcommunityuses; + u32_t inasnparseerrs; + u32_t intoobigs; + u32_t innosuchnames; + u32_t inbadvalues; + u32_t inreadonlys; + u32_t ingenerrs; + u32_t intotalreqvars; + u32_t intotalsetvars; + u32_t ingetrequests; + u32_t ingetnexts; + u32_t insetrequests; + u32_t ingetresponses; + u32_t intraps; + u32_t outtoobigs; + u32_t outnosuchnames; + u32_t outbadvalues; + u32_t outgenerrs; + u32_t outgetrequests; + u32_t outgetnexts; + u32_t outsetrequests; + u32_t outgetresponses; + u32_t outtraps; +#if LWIP_SNMP_V3 + u32_t unsupportedseclevels; + u32_t notintimewindows; + u32_t unknownusernames; + u32_t unknownengineids; + u32_t wrongdigests; + u32_t decryptionerrors; +#endif +}; + +extern struct snmp_statistics snmp_stats; + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SNMP */ + +#endif /* LWIP_HDR_APPS_SNMP_CORE_H */ diff --git a/lib/lwip/include/lwip/apps/snmp_mib2.h b/lib/lwip/include/lwip/apps/snmp_mib2.h new file mode 100644 index 0000000000..453e5195cb --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp_mib2.h @@ -0,0 +1,78 @@ +/** + * @file + * SNMP MIB2 API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Dirk Ziegelmeier dziegel@gmx.de + * + */ +#ifndef LWIP_HDR_APPS_SNMP_MIB2_H +#define LWIP_HDR_APPS_SNMP_MIB2_H + +#include "lwip/apps/snmp_opts.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ +#if SNMP_LWIP_MIB2 + +#include "lwip/apps/snmp_core.h" + +extern const struct snmp_mib mib2; + +#if SNMP_USE_NETCONN +#include "lwip/apps/snmp_threadsync.h" +void snmp_mib2_lwip_synchronizer(snmp_threadsync_called_fn fn, void* arg); +extern struct snmp_threadsync_instance snmp_mib2_lwip_locks; +#endif + +#ifndef SNMP_SYSSERVICES +#define SNMP_SYSSERVICES ((1 << 6) | (1 << 3) | ((IP_FORWARD) << 2)) +#endif + +void snmp_mib2_set_sysdescr(const u8_t* str, const u16_t* len); /* read-only be definition */ +void snmp_mib2_set_syscontact(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize); +void snmp_mib2_set_syscontact_readonly(const u8_t *ocstr, const u16_t *ocstrlen); +void snmp_mib2_set_sysname(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize); +void snmp_mib2_set_sysname_readonly(const u8_t *ocstr, const u16_t *ocstrlen); +void snmp_mib2_set_syslocation(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize); +void snmp_mib2_set_syslocation_readonly(const u8_t *ocstr, const u16_t *ocstrlen); + +#endif /* SNMP_LWIP_MIB2 */ +#endif /* LWIP_SNMP */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_SNMP_MIB2_H */ diff --git a/lib/lwip/include/lwip/apps/snmp_opts.h b/lib/lwip/include/lwip/apps/snmp_opts.h new file mode 100644 index 0000000000..c892d22afa --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp_opts.h @@ -0,0 +1,297 @@ +/** + * @file + * SNMP server options list + */ + +/* + * Copyright (c) 2015 Dirk Ziegelmeier + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Dirk Ziegelmeier + * + */ +#ifndef LWIP_HDR_SNMP_OPTS_H +#define LWIP_HDR_SNMP_OPTS_H + +#include "lwip/opt.h" + +/** + * @defgroup snmp_opts Options + * @ingroup snmp + * @{ + */ + +/** + * LWIP_SNMP==1: This enables the lwIP SNMP agent. UDP must be available + * for SNMP transport. + * If you want to use your own SNMP agent, leave this disabled. + * To integrate MIB2 of an external agent, you need to enable + * LWIP_MIB2_CALLBACKS and MIB2_STATS. This will give you the callbacks + * and statistics counters you need to get MIB2 working. + */ +#if !defined LWIP_SNMP || defined __DOXYGEN__ +#define LWIP_SNMP 0 +#endif + +/** + * SNMP_USE_NETCONN: Use netconn API instead of raw API. + * Makes SNMP agent run in a worker thread, so blocking operations + * can be done in MIB calls. + */ +#if !defined SNMP_USE_NETCONN || defined __DOXYGEN__ +#define SNMP_USE_NETCONN 0 +#endif + +/** + * SNMP_USE_RAW: Use raw API. + * SNMP agent does not run in a worker thread, so blocking operations + * should not be done in MIB calls. + */ +#if !defined SNMP_USE_RAW || defined __DOXYGEN__ +#define SNMP_USE_RAW 1 +#endif + +#if SNMP_USE_NETCONN && SNMP_USE_RAW +#error SNMP stack can use only one of the APIs {raw, netconn} +#endif + +#if LWIP_SNMP && !SNMP_USE_NETCONN && !SNMP_USE_RAW +#error SNMP stack needs a receive API and UDP {raw, netconn} +#endif + +#if SNMP_USE_NETCONN +/** + * SNMP_STACK_SIZE: Stack size of SNMP netconn worker thread + */ +#if !defined SNMP_STACK_SIZE || defined __DOXYGEN__ +#define SNMP_STACK_SIZE DEFAULT_THREAD_STACKSIZE +#endif + +/** + * SNMP_THREAD_PRIO: SNMP netconn worker thread priority + */ +#if !defined SNMP_THREAD_PRIO || defined __DOXYGEN__ +#define SNMP_THREAD_PRIO DEFAULT_THREAD_PRIO +#endif +#endif /* SNMP_USE_NETCONN */ + +/** + * SNMP_TRAP_DESTINATIONS: Number of trap destinations. At least one trap + * destination is required + */ +#if !defined SNMP_TRAP_DESTINATIONS || defined __DOXYGEN__ +#define SNMP_TRAP_DESTINATIONS 1 +#endif + +/** + * Only allow SNMP write actions that are 'safe' (e.g. disabling netifs is not + * a safe action and disabled when SNMP_SAFE_REQUESTS = 1). + * Unsafe requests are disabled by default! + */ +#if !defined SNMP_SAFE_REQUESTS || defined __DOXYGEN__ +#define SNMP_SAFE_REQUESTS 1 +#endif + +/** + * The maximum length of strings used. + */ +#if !defined SNMP_MAX_OCTET_STRING_LEN || defined __DOXYGEN__ +#define SNMP_MAX_OCTET_STRING_LEN 127 +#endif + +/** + * The maximum number of Sub ID's inside an object identifier. + * Indirectly this also limits the maximum depth of SNMP tree. + */ +#if !defined SNMP_MAX_OBJ_ID_LEN || defined __DOXYGEN__ +#define SNMP_MAX_OBJ_ID_LEN 50 +#endif + +#if !defined SNMP_MAX_VALUE_SIZE || defined __DOXYGEN__ +/** + * The minimum size of a value. + */ +#define SNMP_MIN_VALUE_SIZE (2 * sizeof(u32_t*)) /* size required to store the basic types (8 bytes for counter64) */ +/** + * The maximum size of a value. + */ +#define SNMP_MAX_VALUE_SIZE LWIP_MAX(LWIP_MAX((SNMP_MAX_OCTET_STRING_LEN), sizeof(u32_t)*(SNMP_MAX_OBJ_ID_LEN)), SNMP_MIN_VALUE_SIZE) +#endif + +/** + * The snmp read-access community. Used for write-access and traps, too + * unless SNMP_COMMUNITY_WRITE or SNMP_COMMUNITY_TRAP are enabled, respectively. + */ +#if !defined SNMP_COMMUNITY || defined __DOXYGEN__ +#define SNMP_COMMUNITY "public" +#endif + +/** + * The snmp write-access community. + * Set this community to "" in order to disallow any write access. + */ +#if !defined SNMP_COMMUNITY_WRITE || defined __DOXYGEN__ +#define SNMP_COMMUNITY_WRITE "private" +#endif + +/** + * The snmp community used for sending traps. + */ +#if !defined SNMP_COMMUNITY_TRAP || defined __DOXYGEN__ +#define SNMP_COMMUNITY_TRAP "public" +#endif + +/** + * The maximum length of community string. + * If community names shall be adjusted at runtime via snmp_set_community() calls, + * enter here the possible maximum length (+1 for terminating null character). + */ +#if !defined SNMP_MAX_COMMUNITY_STR_LEN || defined __DOXYGEN__ +#define SNMP_MAX_COMMUNITY_STR_LEN LWIP_MAX(LWIP_MAX(sizeof(SNMP_COMMUNITY), sizeof(SNMP_COMMUNITY_WRITE)), sizeof(SNMP_COMMUNITY_TRAP)) +#endif + +/** + * The OID identifiying the device. This may be the enterprise OID itself or any OID located below it in tree. + */ +#if !defined SNMP_DEVICE_ENTERPRISE_OID || defined __DOXYGEN__ +#define SNMP_LWIP_ENTERPRISE_OID 26381 +/** + * IANA assigned enterprise ID for lwIP is 26381 + * @see http://www.iana.org/assignments/enterprise-numbers + * + * @note this enterprise ID is assigned to the lwIP project, + * all object identifiers living under this ID are assigned + * by the lwIP maintainers! + * @note don't change this define, use snmp_set_device_enterprise_oid() + * + * If you need to create your own private MIB you'll need + * to apply for your own enterprise ID with IANA: + * http://www.iana.org/numbers.html + */ +#define SNMP_DEVICE_ENTERPRISE_OID {1, 3, 6, 1, 4, 1, SNMP_LWIP_ENTERPRISE_OID} +/** + * Length of SNMP_DEVICE_ENTERPRISE_OID + */ +#define SNMP_DEVICE_ENTERPRISE_OID_LEN 7 +#endif + +/** + * SNMP_DEBUG: Enable debugging for SNMP messages. + */ +#if !defined SNMP_DEBUG || defined __DOXYGEN__ +#define SNMP_DEBUG LWIP_DBG_OFF +#endif + +/** + * SNMP_MIB_DEBUG: Enable debugging for SNMP MIBs. + */ +#if !defined SNMP_MIB_DEBUG || defined __DOXYGEN__ +#define SNMP_MIB_DEBUG LWIP_DBG_OFF +#endif + +/** + * Indicates if the MIB2 implementation of LWIP SNMP stack is used. + */ +#if !defined SNMP_LWIP_MIB2 || defined __DOXYGEN__ +#define SNMP_LWIP_MIB2 LWIP_SNMP +#endif + +/** + * Value return for sysDesc field of MIB2. + */ +#if !defined SNMP_LWIP_MIB2_SYSDESC || defined __DOXYGEN__ +#define SNMP_LWIP_MIB2_SYSDESC "lwIP" +#endif + +/** + * Value return for sysName field of MIB2. + * To make sysName field settable, call snmp_mib2_set_sysname() to provide the necessary buffers. + */ +#if !defined SNMP_LWIP_MIB2_SYSNAME || defined __DOXYGEN__ +#define SNMP_LWIP_MIB2_SYSNAME "FQDN-unk" +#endif + +/** + * Value return for sysContact field of MIB2. + * To make sysContact field settable, call snmp_mib2_set_syscontact() to provide the necessary buffers. + */ +#if !defined SNMP_LWIP_MIB2_SYSCONTACT || defined __DOXYGEN__ +#define SNMP_LWIP_MIB2_SYSCONTACT "" +#endif + +/** + * Value return for sysLocation field of MIB2. + * To make sysLocation field settable, call snmp_mib2_set_syslocation() to provide the necessary buffers. + */ +#if !defined SNMP_LWIP_MIB2_SYSLOCATION || defined __DOXYGEN__ +#define SNMP_LWIP_MIB2_SYSLOCATION "" +#endif + +/** + * This value is used to limit the repetitions processed in GetBulk requests (value == 0 means no limitation). + * This may be useful to limit the load for a single request. + * According to SNMP RFC 1905 it is allowed to not return all requested variables from a GetBulk request if system load would be too high. + * so the effect is that the client will do more requests to gather all data. + * For the stack this could be useful in case that SNMP processing is done in TCP/IP thread. In this situation a request with many + * repetitions could block the thread for a longer time. Setting limit here will keep the stack more responsive. + */ +#if !defined SNMP_LWIP_GETBULK_MAX_REPETITIONS || defined __DOXYGEN__ +#define SNMP_LWIP_GETBULK_MAX_REPETITIONS 0 +#endif + +/** + * @} + */ + +/* + ------------------------------------ + ---------- SNMPv3 options ---------- + ------------------------------------ +*/ + +/** + * LWIP_SNMP_V3==1: This enables EXPERIMENTAL SNMPv3 support. LWIP_SNMP must + * also be enabled. + * THIS IS UNDER DEVELOPMENT AND SHOULD NOT BE ENABLED IN PRODUCTS. + */ +#ifndef LWIP_SNMP_V3 +#define LWIP_SNMP_V3 0 +#endif + +#ifndef LWIP_SNMP_V3_MBEDTLS +#define LWIP_SNMP_V3_MBEDTLS LWIP_SNMP_V3 +#endif + +#ifndef LWIP_SNMP_V3_CRYPTO +#define LWIP_SNMP_V3_CRYPTO LWIP_SNMP_V3_MBEDTLS +#endif + +#ifndef LWIP_SNMP_CONFIGURE_VERSIONS +#define LWIP_SNMP_CONFIGURE_VERSIONS 0 +#endif + +#endif /* LWIP_HDR_SNMP_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/snmp_scalar.h b/lib/lwip/include/lwip/apps/snmp_scalar.h new file mode 100644 index 0000000000..40a060c640 --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp_scalar.h @@ -0,0 +1,113 @@ +/** + * @file + * SNMP server MIB API to implement scalar nodes + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Martin Hentschel info@cl-soft.de + * + */ + +#ifndef LWIP_HDR_APPS_SNMP_SCALAR_H +#define LWIP_HDR_APPS_SNMP_SCALAR_H + +#include "lwip/apps/snmp_opts.h" +#include "lwip/apps/snmp_core.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +/** basic scalar node */ +struct snmp_scalar_node +{ + /** inherited "base class" members */ + struct snmp_leaf_node node; + u8_t asn1_type; + snmp_access_t access; + node_instance_get_value_method get_value; + node_instance_set_test_method set_test; + node_instance_set_value_method set_value; +}; + + +snmp_err_t snmp_scalar_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); +snmp_err_t snmp_scalar_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); + +#define SNMP_SCALAR_CREATE_NODE(oid, access, asn1_type, get_value_method, set_test_method, set_value_method) \ + {{{ SNMP_NODE_SCALAR, (oid) }, \ + snmp_scalar_get_instance, \ + snmp_scalar_get_next_instance }, \ + (asn1_type), (access), (get_value_method), (set_test_method), (set_value_method) } + +#define SNMP_SCALAR_CREATE_NODE_READONLY(oid, asn1_type, get_value_method) SNMP_SCALAR_CREATE_NODE(oid, SNMP_NODE_INSTANCE_READ_ONLY, asn1_type, get_value_method, NULL, NULL) + +/** scalar array node - a tree node which contains scalars only as children */ +struct snmp_scalar_array_node_def +{ + u32_t oid; + u8_t asn1_type; + snmp_access_t access; +}; + +typedef s16_t (*snmp_scalar_array_get_value_method)(const struct snmp_scalar_array_node_def*, void*); +typedef snmp_err_t (*snmp_scalar_array_set_test_method)(const struct snmp_scalar_array_node_def*, u16_t, void*); +typedef snmp_err_t (*snmp_scalar_array_set_value_method)(const struct snmp_scalar_array_node_def*, u16_t, void*); + +/** basic scalar array node */ +struct snmp_scalar_array_node +{ + /** inherited "base class" members */ + struct snmp_leaf_node node; + u16_t array_node_count; + const struct snmp_scalar_array_node_def* array_nodes; + snmp_scalar_array_get_value_method get_value; + snmp_scalar_array_set_test_method set_test; + snmp_scalar_array_set_value_method set_value; +}; + +snmp_err_t snmp_scalar_array_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); +snmp_err_t snmp_scalar_array_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); + +#define SNMP_SCALAR_CREATE_ARRAY_NODE(oid, array_nodes, get_value_method, set_test_method, set_value_method) \ + {{{ SNMP_NODE_SCALAR_ARRAY, (oid) }, \ + snmp_scalar_array_get_instance, \ + snmp_scalar_array_get_next_instance }, \ + (u16_t)LWIP_ARRAYSIZE(array_nodes), (array_nodes), (get_value_method), (set_test_method), (set_value_method) } + +#endif /* LWIP_SNMP */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_SNMP_SCALAR_H */ diff --git a/lib/lwip/include/lwip/apps/snmp_snmpv2_framework.h b/lib/lwip/include/lwip/apps/snmp_snmpv2_framework.h new file mode 100644 index 0000000000..47409cc201 --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp_snmpv2_framework.h @@ -0,0 +1,32 @@ +/* +Generated by LwipMibCompiler +*/ + +#ifndef LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H +#define LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H + +#include "lwip/apps/snmp_opts.h" +#if LWIP_SNMP + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#include "lwip/apps/snmp_core.h" + +extern const struct snmp_obj_id usmNoAuthProtocol; +extern const struct snmp_obj_id usmHMACMD5AuthProtocol; +extern const struct snmp_obj_id usmHMACSHAAuthProtocol; + +extern const struct snmp_obj_id usmNoPrivProtocol; +extern const struct snmp_obj_id usmDESPrivProtocol; +extern const struct snmp_obj_id usmAESPrivProtocol; + +extern const struct snmp_mib snmpframeworkmib; + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* LWIP_SNMP */ +#endif /* LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H */ diff --git a/lib/lwip/include/lwip/apps/snmp_snmpv2_usm.h b/lib/lwip/include/lwip/apps/snmp_snmpv2_usm.h new file mode 100644 index 0000000000..88cfcd8ebe --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp_snmpv2_usm.h @@ -0,0 +1,24 @@ +/* +Generated by LwipMibCompiler +*/ + +#ifndef LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H +#define LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H + +#include "lwip/apps/snmp_opts.h" +#if LWIP_SNMP + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#include "lwip/apps/snmp_core.h" + +extern const struct snmp_mib snmpusmmib; + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* LWIP_SNMP */ +#endif /* LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H */ diff --git a/lib/lwip/include/lwip/apps/snmp_table.h b/lib/lwip/include/lwip/apps/snmp_table.h new file mode 100644 index 0000000000..4988b51c25 --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp_table.h @@ -0,0 +1,134 @@ +/** + * @file + * SNMP server MIB API to implement table nodes + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Martin Hentschel info@cl-soft.de + * + */ + +#ifndef LWIP_HDR_APPS_SNMP_TABLE_H +#define LWIP_HDR_APPS_SNMP_TABLE_H + +#include "lwip/apps/snmp_opts.h" +#include "lwip/apps/snmp_core.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +/** default (customizable) read/write table */ +struct snmp_table_col_def +{ + u32_t index; + u8_t asn1_type; + snmp_access_t access; +}; + +/** table node */ +struct snmp_table_node +{ + /** inherited "base class" members */ + struct snmp_leaf_node node; + u16_t column_count; + const struct snmp_table_col_def* columns; + snmp_err_t (*get_cell_instance)(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, struct snmp_node_instance* cell_instance); + snmp_err_t (*get_next_cell_instance)(const u32_t* column, struct snmp_obj_id* row_oid, struct snmp_node_instance* cell_instance); + /** returns object value for the given object identifier */ + node_instance_get_value_method get_value; + /** tests length and/or range BEFORE setting */ + node_instance_set_test_method set_test; + /** sets object value, only called when set_test() was successful */ + node_instance_set_value_method set_value; +}; + +snmp_err_t snmp_table_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); +snmp_err_t snmp_table_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); + +#define SNMP_TABLE_CREATE(oid, columns, get_cell_instance_method, get_next_cell_instance_method, get_value_method, set_test_method, set_value_method) \ + {{{ SNMP_NODE_TABLE, (oid) }, \ + snmp_table_get_instance, \ + snmp_table_get_next_instance }, \ + (u16_t)LWIP_ARRAYSIZE(columns), (columns), \ + (get_cell_instance_method), (get_next_cell_instance_method), \ + (get_value_method), (set_test_method), (set_value_method)} + +#define SNMP_TABLE_GET_COLUMN_FROM_OID(oid) ((oid)[1]) /* first array value is (fixed) row entry (fixed to 1) and 2nd value is column, follow3ed by instance */ + + +/** simple read-only table */ +typedef enum { + SNMP_VARIANT_VALUE_TYPE_U32, + SNMP_VARIANT_VALUE_TYPE_S32, + SNMP_VARIANT_VALUE_TYPE_PTR, + SNMP_VARIANT_VALUE_TYPE_CONST_PTR +} snmp_table_column_data_type_t; + +struct snmp_table_simple_col_def +{ + u32_t index; + u8_t asn1_type; + snmp_table_column_data_type_t data_type; /* depending of what union member is used to store the value*/ +}; + +/** simple read-only table node */ +struct snmp_table_simple_node +{ + /* inherited "base class" members */ + struct snmp_leaf_node node; + u16_t column_count; + const struct snmp_table_simple_col_def* columns; + snmp_err_t (*get_cell_value)(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len); + snmp_err_t (*get_next_cell_instance_and_value)(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len); +}; + +snmp_err_t snmp_table_simple_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); +snmp_err_t snmp_table_simple_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); + +#define SNMP_TABLE_CREATE_SIMPLE(oid, columns, get_cell_value_method, get_next_cell_instance_and_value_method) \ + {{{ SNMP_NODE_TABLE, (oid) }, \ + snmp_table_simple_get_instance, \ + snmp_table_simple_get_next_instance }, \ + (u16_t)LWIP_ARRAYSIZE(columns), (columns), (get_cell_value_method), (get_next_cell_instance_and_value_method) } + +s16_t snmp_table_extract_value_from_s32ref(struct snmp_node_instance* instance, void* value); +s16_t snmp_table_extract_value_from_u32ref(struct snmp_node_instance* instance, void* value); +s16_t snmp_table_extract_value_from_refconstptr(struct snmp_node_instance* instance, void* value); + +#endif /* LWIP_SNMP */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_SNMP_TABLE_H */ diff --git a/lib/lwip/include/lwip/apps/snmp_threadsync.h b/lib/lwip/include/lwip/apps/snmp_threadsync.h new file mode 100644 index 0000000000..76f11182c2 --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmp_threadsync.h @@ -0,0 +1,114 @@ +/** + * @file + * SNMP server MIB API to implement thread synchronization + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Dirk Ziegelmeier dziegel@gmx.de + * + */ + +#ifndef LWIP_HDR_APPS_SNMP_THREADSYNC_H +#define LWIP_HDR_APPS_SNMP_THREADSYNC_H + +#include "lwip/apps/snmp_opts.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/apps/snmp_core.h" +#include "lwip/sys.h" + +typedef void (*snmp_threadsync_called_fn)(void* arg); +typedef void (*snmp_threadsync_synchronizer_fn)(snmp_threadsync_called_fn fn, void* arg); + + +/** Thread sync runtime data. For internal usage only. */ +struct threadsync_data +{ + union { + snmp_err_t err; + s16_t s16; + } retval; + union { + const u32_t *root_oid; + void *value; + } arg1; + union { + u8_t root_oid_len; + u16_t len; + } arg2; + const struct snmp_threadsync_node *threadsync_node; + struct snmp_node_instance proxy_instance; +}; + +/** Thread sync instance. Needed EXACTLY once for every thread to be synced into. */ +struct snmp_threadsync_instance +{ + sys_sem_t sem; + sys_mutex_t sem_usage_mutex; + snmp_threadsync_synchronizer_fn sync_fn; + struct threadsync_data data; +}; + +/** SNMP thread sync proxy leaf node */ +struct snmp_threadsync_node +{ + /* inherited "base class" members */ + struct snmp_leaf_node node; + + const struct snmp_leaf_node *target; + struct snmp_threadsync_instance *instance; +}; + +snmp_err_t snmp_threadsync_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); +snmp_err_t snmp_threadsync_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance); + +/** Create thread sync proxy node */ +#define SNMP_CREATE_THREAD_SYNC_NODE(oid, target_leaf_node, threadsync_instance) \ + {{{ SNMP_NODE_THREADSYNC, (oid) }, \ + snmp_threadsync_get_instance, \ + snmp_threadsync_get_next_instance }, \ + (target_leaf_node), \ + (threadsync_instance) } + +/** Create thread sync instance data */ +void snmp_threadsync_init(struct snmp_threadsync_instance *instance, snmp_threadsync_synchronizer_fn sync_fn); + +#endif /* LWIP_SNMP */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_SNMP_THREADSYNC_H */ diff --git a/lib/lwip/include/lwip/apps/snmpv3.h b/lib/lwip/include/lwip/apps/snmpv3.h new file mode 100644 index 0000000000..e0dda6499b --- /dev/null +++ b/lib/lwip/include/lwip/apps/snmpv3.h @@ -0,0 +1,114 @@ +/** + * @file + * Additional SNMPv3 functionality RFC3414 and RFC3826. + */ + +/* + * Copyright (c) 2016 Elias Oenal. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Elias Oenal lwip@eliasoenal.com + */ + +#ifndef LWIP_HDR_APPS_SNMP_V3_H +#define LWIP_HDR_APPS_SNMP_V3_H + +#include "lwip/apps/snmp_opts.h" +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_SNMP && LWIP_SNMP_V3 + +typedef enum +{ + SNMP_V3_AUTH_ALGO_INVAL = 0, + SNMP_V3_AUTH_ALGO_MD5 = 1, + SNMP_V3_AUTH_ALGO_SHA = 2 +} snmpv3_auth_algo_t; + +typedef enum +{ + SNMP_V3_PRIV_ALGO_INVAL = 0, + SNMP_V3_PRIV_ALGO_DES = 1, + SNMP_V3_PRIV_ALGO_AES = 2 +} snmpv3_priv_algo_t; + +typedef enum +{ + SNMP_V3_USER_STORAGETYPE_OTHER = 1, + SNMP_V3_USER_STORAGETYPE_VOLATILE = 2, + SNMP_V3_USER_STORAGETYPE_NONVOLATILE = 3, + SNMP_V3_USER_STORAGETYPE_PERMANENT = 4, + SNMP_V3_USER_STORAGETYPE_READONLY = 5 +} snmpv3_user_storagetype_t; + +/* + * The following callback functions must be implemented by the application. + * There is a dummy implementation in snmpv3_dummy.c. + */ + +void snmpv3_get_engine_id(const char **id, u8_t *len); +err_t snmpv3_set_engine_id(const char* id, u8_t len); + +u32_t snmpv3_get_engine_boots(void); +void snmpv3_set_engine_boots(u32_t boots); + +u32_t snmpv3_get_engine_time(void); +void snmpv3_reset_engine_time(void); + +err_t snmpv3_get_user(const char* username, snmpv3_auth_algo_t *auth_algo, u8_t *auth_key, snmpv3_priv_algo_t *priv_algo, u8_t *priv_key); +u8_t snmpv3_get_amount_of_users(void); +err_t snmpv3_get_user_storagetype(const char *username, snmpv3_user_storagetype_t *storagetype); +err_t snmpv3_get_username(char *username, u8_t index); + +/* The following functions are provided by the SNMPv3 agent */ + +void snmpv3_engine_id_changed(void); +s32_t snmpv3_get_engine_time_internal(void); + +void snmpv3_password_to_key_md5( + const u8_t *password, /* IN */ + size_t passwordlen, /* IN */ + const u8_t *engineID, /* IN - pointer to snmpEngineID */ + u8_t engineLength, /* IN - length of snmpEngineID */ + u8_t *key); /* OUT - pointer to caller 16-octet buffer */ + +void snmpv3_password_to_key_sha( + const u8_t *password, /* IN */ + size_t passwordlen, /* IN */ + const u8_t *engineID, /* IN - pointer to snmpEngineID */ + u8_t engineLength, /* IN - length of snmpEngineID */ + u8_t *key); /* OUT - pointer to caller 20-octet buffer */ + +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_SNMP_V3_H */ diff --git a/lib/lwip/include/lwip/apps/sntp.h b/lib/lwip/include/lwip/apps/sntp.h new file mode 100644 index 0000000000..11dacce96e --- /dev/null +++ b/lib/lwip/include/lwip/apps/sntp.h @@ -0,0 +1,81 @@ +/** + * @file + * SNTP client API + */ + +/* + * Copyright (c) 2007-2009 Frédéric Bernon, Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Frédéric Bernon, Simon Goldschmidt + * + */ +#ifndef LWIP_HDR_APPS_SNTP_H +#define LWIP_HDR_APPS_SNTP_H + +#include "lwip/apps/sntp_opts.h" +#include "lwip/ip_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* SNTP operating modes: default is to poll using unicast. + The mode has to be set before calling sntp_init(). */ +#define SNTP_OPMODE_POLL 0 +#define SNTP_OPMODE_LISTENONLY 1 +void sntp_setoperatingmode(u8_t operating_mode); +u8_t sntp_getoperatingmode(void); + +void sntp_init(void); +void sntp_stop(void); +u8_t sntp_enabled(void); + +void sntp_setserver(u8_t idx, const ip_addr_t *addr); +const ip_addr_t* sntp_getserver(u8_t idx); +u8_t sntp_getkodreceived(u8_t idx); + +#if SNTP_MONITOR_SERVER_REACHABILITY +u8_t sntp_getreachability(u8_t idx); +#endif /* SNTP_MONITOR_SERVER_REACHABILITY */ + +#if SNTP_SERVER_DNS +void sntp_setservername(u8_t idx, const char *server); +const char *sntp_getservername(u8_t idx); +#endif /* SNTP_SERVER_DNS */ + +#if SNTP_GET_SERVERS_FROM_DHCP || SNTP_GET_SERVERS_FROM_DHCPV6 +void sntp_servermode_dhcp(int set_servers_from_dhcp); +#else /* SNTP_GET_SERVERS_FROM_DHCP || SNTP_GET_SERVERS_FROM_DHCPV6 */ +#define sntp_servermode_dhcp(x) +#endif /* SNTP_GET_SERVERS_FROM_DHCP || SNTP_GET_SERVERS_FROM_DHCPV6 */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_SNTP_H */ diff --git a/lib/lwip/include/lwip/apps/sntp_opts.h b/lib/lwip/include/lwip/apps/sntp_opts.h new file mode 100644 index 0000000000..cb62771648 --- /dev/null +++ b/lib/lwip/include/lwip/apps/sntp_opts.h @@ -0,0 +1,215 @@ +/** + * @file + * SNTP client options list + */ + +/* + * Copyright (c) 2007-2009 Frédéric Bernon, Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Frédéric Bernon, Simon Goldschmidt + * + */ +#ifndef LWIP_HDR_APPS_SNTP_OPTS_H +#define LWIP_HDR_APPS_SNTP_OPTS_H + +#include "lwip/opt.h" +#include "lwip/prot/iana.h" + +/** + * @defgroup sntp_opts Options + * @ingroup sntp + * @{ + */ + +/** SNTP macro to change system time in seconds + * Define SNTP_SET_SYSTEM_TIME_US(sec, us) to set the time in microseconds + * instead of this one if you need the additional precision. Alternatively, + * define SNTP_SET_SYSTEM_TIME_NTP(sec, frac) in order to work with native + * NTP timestamps instead. + */ +#if !defined SNTP_SET_SYSTEM_TIME || defined __DOXYGEN__ +#define SNTP_SET_SYSTEM_TIME(sec) LWIP_UNUSED_ARG(sec) +#endif + +/** The maximum number of SNTP servers that can be set */ +#if !defined SNTP_MAX_SERVERS || defined __DOXYGEN__ +#define SNTP_MAX_SERVERS LWIP_DHCP_MAX_NTP_SERVERS +#endif + +/** Set this to 1 to implement the callback function called by dhcp when + * NTP servers are received. */ +#if !defined SNTP_GET_SERVERS_FROM_DHCP || defined __DOXYGEN__ +#define SNTP_GET_SERVERS_FROM_DHCP LWIP_DHCP_GET_NTP_SRV +#endif + +/** Set this to 1 to implement the callback function called by dhcpv6 when + * NTP servers are received. */ +#if !defined SNTP_GET_SERVERS_FROM_DHCPV6 || defined __DOXYGEN__ +#define SNTP_GET_SERVERS_FROM_DHCPV6 LWIP_DHCP6_GET_NTP_SRV +#endif + +/** Set this to 1 to support DNS names (or IP address strings) to set sntp servers + * One server address/name can be defined as default if SNTP_SERVER_DNS == 1: + * #define SNTP_SERVER_ADDRESS "pool.ntp.org" + */ +#if !defined SNTP_SERVER_DNS || defined __DOXYGEN__ +#define SNTP_SERVER_DNS 0 +#endif + +/** + * SNTP_DEBUG: Enable debugging for SNTP. + */ +#if !defined SNTP_DEBUG || defined __DOXYGEN__ +#define SNTP_DEBUG LWIP_DBG_OFF +#endif + +/** SNTP server port */ +#if !defined SNTP_PORT || defined __DOXYGEN__ +#define SNTP_PORT LWIP_IANA_PORT_SNTP +#endif + +/** Sanity check: + * Define this to + * - 0 to turn off sanity checks (default; smaller code) + * - >= 1 to check address and port of the response packet to ensure the + * response comes from the server we sent the request to. + * - >= 2 to check returned Originate Timestamp against Transmit Timestamp + * sent to the server (to ensure response to older request). + * - >= 3 @todo: discard reply if any of the VN, Stratum, or Transmit Timestamp + * fields is 0 or the Mode field is not 4 (unicast) or 5 (broadcast). + * - >= 4 @todo: to check that the Root Delay and Root Dispersion fields are each + * greater than or equal to 0 and less than infinity, where infinity is + * currently a cozy number like one second. This check avoids using a + * server whose synchronization source has expired for a very long time. + */ +#if !defined SNTP_CHECK_RESPONSE || defined __DOXYGEN__ +#define SNTP_CHECK_RESPONSE 0 +#endif + +/** Enable round-trip delay compensation. + * Compensate for the round-trip delay by calculating the clock offset from + * the originate, receive, transmit and destination timestamps, as per RFC. + * + * The calculation requires compiler support for 64-bit integers. Also, either + * SNTP_SET_SYSTEM_TIME_US or SNTP_SET_SYSTEM_TIME_NTP has to be implemented + * for setting the system clock with sub-second precision. Likewise, either + * SNTP_GET_SYSTEM_TIME or SNTP_GET_SYSTEM_TIME_NTP needs to be implemented + * with sub-second precision. + * + * Although not strictly required, it makes sense to combine this option with + * SNTP_CHECK_RESPONSE >= 2 for sanity-checking of the received timestamps. + * Also, in order for the round-trip calculation to work, the difference + * between the local clock and the NTP server clock must not be larger than + * about 34 years. If that limit is exceeded, the implementation will fall back + * to setting the clock without compensation. In order to ensure that the local + * clock is always within the permitted range for compensation, even at first + * try, it may be necessary to store at least the current year in non-volatile + * memory. + */ +#if !defined SNTP_COMP_ROUNDTRIP || defined __DOXYGEN__ +#define SNTP_COMP_ROUNDTRIP 0 +#endif + +/** According to the RFC, this shall be a random delay + * between 1 and 5 minutes (in milliseconds) to prevent load peaks. + * This can be defined to a random generation function, + * which must return the delay in milliseconds as u32_t. + * Turned off by default. + */ +#if !defined SNTP_STARTUP_DELAY || defined __DOXYGEN__ +#ifdef LWIP_RAND +#define SNTP_STARTUP_DELAY 1 +#else +#define SNTP_STARTUP_DELAY 0 +#endif +#endif + +/** If you want the startup delay to be a function, define this + * to a function (including the brackets) and define SNTP_STARTUP_DELAY to 1. + */ +#if !defined SNTP_STARTUP_DELAY_FUNC || defined __DOXYGEN__ +#define SNTP_STARTUP_DELAY_FUNC (LWIP_RAND() % 5000) +#endif + +/** SNTP receive timeout - in milliseconds + * Also used as retry timeout - this shouldn't be too low. + * Default is 15 seconds. Must not be beolw 15 seconds by specification (i.e. 15000) + */ +#if !defined SNTP_RECV_TIMEOUT || defined __DOXYGEN__ +#define SNTP_RECV_TIMEOUT 15000 +#endif + +/** SNTP update delay - in milliseconds + * Default is 1 hour. Must not be beolw 60 seconds by specification (i.e. 60000) + */ +#if !defined SNTP_UPDATE_DELAY || defined __DOXYGEN__ +#define SNTP_UPDATE_DELAY 3600000 +#endif + +/** SNTP macro to get system time, used with SNTP_CHECK_RESPONSE >= 2 + * to send in request and compare in response. Also used for round-trip + * delay compensation if SNTP_COMP_ROUNDTRIP != 0. + * Alternatively, define SNTP_GET_SYSTEM_TIME_NTP(sec, frac) in order to + * work with native NTP timestamps instead. + */ +#if !defined SNTP_GET_SYSTEM_TIME || defined __DOXYGEN__ +#define SNTP_GET_SYSTEM_TIME(sec, us) do { (sec) = 0; (us) = 0; } while(0) +#endif + +/** Default retry timeout (in milliseconds) if the response + * received is invalid. + * This is doubled with each retry until SNTP_RETRY_TIMEOUT_MAX is reached. + */ +#if !defined SNTP_RETRY_TIMEOUT || defined __DOXYGEN__ +#define SNTP_RETRY_TIMEOUT SNTP_RECV_TIMEOUT +#endif + +/** Maximum retry timeout (in milliseconds). */ +#if !defined SNTP_RETRY_TIMEOUT_MAX || defined __DOXYGEN__ +#define SNTP_RETRY_TIMEOUT_MAX (SNTP_RETRY_TIMEOUT * 10) +#endif + +/** Increase retry timeout with every retry sent + * Default is on to conform to RFC. + */ +#if !defined SNTP_RETRY_TIMEOUT_EXP || defined __DOXYGEN__ +#define SNTP_RETRY_TIMEOUT_EXP 1 +#endif + +/** Keep a reachability shift register per server + * Default is on to conform to RFC. + */ +#if !defined SNTP_MONITOR_SERVER_REACHABILITY || defined __DOXYGEN__ +#define SNTP_MONITOR_SERVER_REACHABILITY 1 +#endif + +/** + * @} + */ + +#endif /* LWIP_HDR_APPS_SNTP_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/tftp_client.h b/lib/lwip/include/lwip/apps/tftp_client.h new file mode 100644 index 0000000000..24dbda6a8c --- /dev/null +++ b/lib/lwip/include/lwip/apps/tftp_client.h @@ -0,0 +1,50 @@ +/** + * + * @file tftp_client.h + * TFTP client header + * + */ + +/* + * Redistribution and use in source and binary forms, with or without + * modification,are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#ifndef LWIP_HDR_APPS_TFTP_CLIENT_H +#define LWIP_HDR_APPS_TFTP_CLIENT_H + +#include "lwip/apps/tftp_common.h" + +enum tftp_transfer_mode { + TFTP_MODE_OCTET, + TFTP_MODE_NETASCII, + TFTP_MODE_BINARY /* used in old versions only */ +}; + +err_t tftp_init_client(const struct tftp_context* ctx); +err_t tftp_get(void* handle, const ip_addr_t *addr, u16_t port, const char* fname, enum tftp_transfer_mode mode); +err_t tftp_put(void* handle, const ip_addr_t *addr, u16_t port, const char* fname, enum tftp_transfer_mode mode); + +#endif /* LWIP_HDR_APPS_TFTP_CLIENT_H */ diff --git a/lib/lwip/include/lwip/apps/tftp_common.h b/lib/lwip/include/lwip/apps/tftp_common.h new file mode 100644 index 0000000000..4bc2c17347 --- /dev/null +++ b/lib/lwip/include/lwip/apps/tftp_common.h @@ -0,0 +1,108 @@ +/** + * + * @file tftp_common.h + * + * @author Logan Gunthorpe logang@deltatee.com + * + * @brief Trivial File Transfer Protocol (RFC 1350) + * + * Copyright (c) Deltatee Enterprises Ltd. 2013 + * All rights reserved. + * + */ + +/* + * Redistribution and use in source and binary forms, with or without + * modification,are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Author: Logan Gunthorpe logang@deltatee.com + * + */ + +#ifndef LWIP_HDR_APPS_TFTP_COMMON_H +#define LWIP_HDR_APPS_TFTP_COMMON_H + +#include "lwip/apps/tftp_opts.h" +#include "lwip/err.h" +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** @ingroup tftp + * TFTP context containing callback functions for TFTP transfers + */ +struct tftp_context { + /** + * Open file for read/write (server mode only). + * @param fname Filename + * @param mode Mode string from TFTP RFC 1350 (netascii, octet, mail) + * @param write Flag indicating read (0) or write (!= 0) access + * @returns File handle supplied to other functions + */ + void* (*open)(const char* fname, const char* mode, u8_t write); + /** + * Close file handle + * @param handle File handle returned by open()/tftp_put()/tftp_get() + */ + void (*close)(void* handle); + /** + * Read from file + * @param handle File handle returned by open()/tftp_put()/tftp_get() + * @param buf Target buffer to copy read data to + * @param bytes Number of bytes to copy to buf + * @returns &gt;= 0: Success; &lt; 0: Error + */ + int (*read)(void* handle, void* buf, int bytes); + /** + * Write to file + * @param handle File handle returned by open()/tftp_put()/tftp_get() + * @param pbuf PBUF adjusted such that payload pointer points + * to the beginning of write data. In other words, + * TFTP headers are stripped off. + * @returns &gt;= 0: Success; &lt; 0: Error + */ + int (*write)(void* handle, struct pbuf* p); + /** + * Error indication from client or response from server + * @param handle File handle set by open()/tftp_get()/tftp_put() + * @param err error code from client or server + * @param msg error message from client or server + * @param size size of msg + */ + void (*error)(void* handle, int err, const char* msg, int size); +}; + +#define LWIP_TFTP_MODE_SERVER 0x01 +#define LWIP_TFTP_MODE_CLIENT 0x02 +#define LWIP_TFTP_MODE_CLIENTSERVER (LWIP_TFTP_MODE_SERVER | LWIP_TFTP_MODE_CLIENT) + +err_t tftp_init_common(u8_t mode, const struct tftp_context* ctx); +void tftp_cleanup(void); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_TFTP_COMMON_H */ diff --git a/lib/lwip/include/lwip/apps/tftp_opts.h b/lib/lwip/include/lwip/apps/tftp_opts.h new file mode 100644 index 0000000000..509fabd679 --- /dev/null +++ b/lib/lwip/include/lwip/apps/tftp_opts.h @@ -0,0 +1,106 @@ +/** + * + * @file tftp_opts.h + * + * @author Logan Gunthorpe logang@deltatee.com + * + * @brief Trivial File Transfer Protocol (RFC 1350) implementation options + * + * Copyright (c) Deltatee Enterprises Ltd. 2013 + * All rights reserved. + * + */ + +/* + * Redistribution and use in source and binary forms, with or without + * modification,are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Author: Logan Gunthorpe logang@deltatee.com + * + */ + +#ifndef LWIP_HDR_APPS_TFTP_OPTS_H +#define LWIP_HDR_APPS_TFTP_OPTS_H + +#include "lwip/opt.h" +#include "lwip/prot/iana.h" + +/** + * @defgroup tftp_opts Options + * @ingroup tftp + * @{ + */ + +/** + * Enable TFTP debug messages + */ +#if !defined TFTP_DEBUG || defined __DOXYGEN__ +#define TFTP_DEBUG LWIP_DBG_OFF +#endif + +/** + * TFTP server port + */ +#if !defined TFTP_PORT || defined __DOXYGEN__ +#define TFTP_PORT LWIP_IANA_PORT_TFTP +#endif + +/** + * TFTP timeout + */ +#if !defined TFTP_TIMEOUT_MSECS || defined __DOXYGEN__ +#define TFTP_TIMEOUT_MSECS 10000 +#endif + +/** + * Max. number of retries when a file is read from server + */ +#if !defined TFTP_MAX_RETRIES || defined __DOXYGEN__ +#define TFTP_MAX_RETRIES 5 +#endif + +/** + * TFTP timer cyclic interval + */ +#if !defined TFTP_TIMER_MSECS || defined __DOXYGEN__ +#define TFTP_TIMER_MSECS (TFTP_TIMEOUT_MSECS / 10) +#endif + +/** + * Max. length of TFTP filename + */ +#if !defined TFTP_MAX_FILENAME_LEN || defined __DOXYGEN__ +#define TFTP_MAX_FILENAME_LEN 20 +#endif + +/** + * Max. length of TFTP mode + */ +#if !defined TFTP_MAX_MODE_LEN || defined __DOXYGEN__ +#define TFTP_MAX_MODE_LEN 10 +#endif + +/** + * @} + */ + +#endif /* LWIP_HDR_APPS_TFTP_OPTS_H */ diff --git a/lib/lwip/include/lwip/apps/tftp_server.h b/lib/lwip/include/lwip/apps/tftp_server.h new file mode 100644 index 0000000000..a5769ce26b --- /dev/null +++ b/lib/lwip/include/lwip/apps/tftp_server.h @@ -0,0 +1,42 @@ +/** + * + * @file tftp_server.h + * TFTP server header + * + */ + +/* + * Redistribution and use in source and binary forms, with or without + * modification,are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#ifndef LWIP_HDR_APPS_TFTP_SERVER_H +#define LWIP_HDR_APPS_TFTP_SERVER_H + +#include "lwip/apps/tftp_common.h" + +err_t tftp_init_server(const struct tftp_context* ctx); + +#endif /* LWIP_HDR_APPS_TFTP_SERVER_H */ diff --git a/lib/lwip/include/lwip/arch.h b/lib/lwip/include/lwip/arch.h new file mode 100644 index 0000000000..596c1c9e06 --- /dev/null +++ b/lib/lwip/include/lwip/arch.h @@ -0,0 +1,402 @@ +/** + * @file + * Support for different processor and compiler architectures + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_ARCH_H +#define LWIP_HDR_ARCH_H + +#ifndef LITTLE_ENDIAN +#define LITTLE_ENDIAN 1234 +#endif + +#ifndef BIG_ENDIAN +#define BIG_ENDIAN 4321 +#endif + +#include "arch/cc.h" + +/** + * @defgroup compiler_abstraction Compiler/platform abstraction + * @ingroup sys_layer + * All defines related to this section must not be placed in lwipopts.h, + * but in arch/cc.h! + * If the compiler does not provide memset() this file must include a + * definition of it, or include a file which defines it. + * These options cannot be #defined in lwipopts.h since they are not options + * of lwIP itself, but options of the lwIP port to your system. + * @{ + */ + +/** Define the byte order of the system. + * Needed for conversion of network data to host byte order. + * Allowed values: LITTLE_ENDIAN and BIG_ENDIAN + */ +#ifndef BYTE_ORDER +#define BYTE_ORDER LITTLE_ENDIAN +#endif + +/** Define random number generator function of your system */ +#ifdef __DOXYGEN__ +#define LWIP_RAND() ((u32_t)rand()) +#endif + +/** Platform specific diagnostic output.<br> + * Note the default implementation pulls in printf, which may + * in turn pull in a lot of standard library code. In resource-constrained + * systems, this should be defined to something less resource-consuming. + */ +#ifndef LWIP_PLATFORM_DIAG +#define LWIP_PLATFORM_DIAG(x) do {printf x;} while(0) +#include <stdio.h> +#include <stdlib.h> +#endif + +/** Platform specific assertion handling.<br> + * Note the default implementation pulls in printf, fflush and abort, which may + * in turn pull in a lot of standard library code. In resource-constrained + * systems, this should be defined to something less resource-consuming. + */ +#ifndef LWIP_PLATFORM_ASSERT +#define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion "%s" failed at line %d in %s\n", \ + x, __LINE__, __FILE__); fflush(NULL); abort();} while(0) +#include <stdio.h> +#include <stdlib.h> +#endif + +/** Define this to 1 in arch/cc.h of your port if you do not want to + * include stddef.h header to get size_t. You need to typedef size_t + * by yourself in this case. + */ +#ifndef LWIP_NO_STDDEF_H +#define LWIP_NO_STDDEF_H 0 +#endif + +#if !LWIP_NO_STDDEF_H +#include <stddef.h> /* for size_t */ +#endif + +/** Define this to 1 in arch/cc.h of your port if your compiler does not provide + * the stdint.h header. You need to typedef the generic types listed in + * lwip/arch.h yourself in this case (u8_t, u16_t...). + */ +#ifndef LWIP_NO_STDINT_H +#define LWIP_NO_STDINT_H 0 +#endif + +/* Define generic types used in lwIP */ +#if !LWIP_NO_STDINT_H +#include <stdint.h> +/* stdint.h is C99 which should also provide support for 64-bit integers */ +#if !defined(LWIP_HAVE_INT64) && defined(UINT64_MAX) +#define LWIP_HAVE_INT64 1 +#endif +typedef uint8_t u8_t; +typedef int8_t s8_t; +typedef uint16_t u16_t; +typedef int16_t s16_t; +typedef uint32_t u32_t; +typedef int32_t s32_t; +#if LWIP_HAVE_INT64 +typedef uint64_t u64_t; +typedef int64_t s64_t; +#endif +typedef uintptr_t mem_ptr_t; +#endif + +/** Define this to 1 in arch/cc.h of your port if your compiler does not provide + * the inttypes.h header. You need to define the format strings listed in + * lwip/arch.h yourself in this case (X8_F, U16_F...). + */ +#ifndef LWIP_NO_INTTYPES_H +#define LWIP_NO_INTTYPES_H 0 +#endif + +/* Define (sn)printf formatters for these lwIP types */ +#if !LWIP_NO_INTTYPES_H +#include <inttypes.h> +#ifndef X8_F +#define X8_F "02" PRIx8 +#endif +#ifndef U16_F +#define U16_F PRIu16 +#endif +#ifndef S16_F +#define S16_F PRId16 +#endif +#ifndef X16_F +#define X16_F PRIx16 +#endif +#ifndef U32_F +#define U32_F PRIu32 +#endif +#ifndef S32_F +#define S32_F PRId32 +#endif +#ifndef X32_F +#define X32_F PRIx32 +#endif +#ifndef SZT_F +#define SZT_F PRIuPTR +#endif +#endif + +/** Define this to 1 in arch/cc.h of your port if your compiler does not provide + * the limits.h header. You need to define the type limits yourself in this case + * (e.g. INT_MAX, SSIZE_MAX). + */ +#ifndef LWIP_NO_LIMITS_H +#define LWIP_NO_LIMITS_H 0 +#endif + +/* Include limits.h? */ +#if !LWIP_NO_LIMITS_H +#include <limits.h> +#endif + +/* Do we need to define ssize_t? This is a compatibility hack: + * Unfortunately, this type seems to be unavailable on some systems (even if + * sys/types or unistd.h are available). + * Being like that, we define it to 'int' if SSIZE_MAX is not defined. + */ +#ifdef SSIZE_MAX +/* If SSIZE_MAX is defined, unistd.h should provide the type as well */ +#ifndef LWIP_NO_UNISTD_H +#define LWIP_NO_UNISTD_H 0 +#endif +#if !LWIP_NO_UNISTD_H +#include <unistd.h> +#endif +#else /* SSIZE_MAX */ +typedef int ssize_t; +#define SSIZE_MAX INT_MAX +#endif /* SSIZE_MAX */ + +/* some maximum values needed in lwip code */ +#define LWIP_UINT32_MAX 0xffffffff + +/** Define this to 1 in arch/cc.h of your port if your compiler does not provide + * the ctype.h header. If ctype.h is available, a few character functions + * are mapped to the appropriate functions (lwip_islower, lwip_isdigit...), if + * not, a private implementation is provided. + */ +#ifndef LWIP_NO_CTYPE_H +#define LWIP_NO_CTYPE_H 0 +#endif + +#if LWIP_NO_CTYPE_H +#define lwip_in_range(c, lo, up) ((u8_t)(c) >= (lo) && (u8_t)(c) <= (up)) +#define lwip_isdigit(c) lwip_in_range((c), '0', '9') +#define lwip_isxdigit(c) (lwip_isdigit(c) || lwip_in_range((c), 'a', 'f') || lwip_in_range((c), 'A', 'F')) +#define lwip_islower(c) lwip_in_range((c), 'a', 'z') +#define lwip_isspace(c) ((c) == ' ' || (c) == '\f' || (c) == '\n' || (c) == '\r' || (c) == '\t' || (c) == '\v') +#define lwip_isupper(c) lwip_in_range((c), 'A', 'Z') +#define lwip_tolower(c) (lwip_isupper(c) ? (c) - 'A' + 'a' : c) +#define lwip_toupper(c) (lwip_islower(c) ? (c) - 'a' + 'A' : c) +#else +#include <ctype.h> +#define lwip_isdigit(c) isdigit((unsigned char)(c)) +#define lwip_isxdigit(c) isxdigit((unsigned char)(c)) +#define lwip_islower(c) islower((unsigned char)(c)) +#define lwip_isspace(c) isspace((unsigned char)(c)) +#define lwip_isupper(c) isupper((unsigned char)(c)) +#define lwip_tolower(c) tolower((unsigned char)(c)) +#define lwip_toupper(c) toupper((unsigned char)(c)) +#endif + +/** C++ const_cast<target_type>(val) equivalent to remove constness from a value (GCC -Wcast-qual) */ +#ifndef LWIP_CONST_CAST +#define LWIP_CONST_CAST(target_type, val) ((target_type)((ptrdiff_t)val)) +#endif + +/** Get rid of alignment cast warnings (GCC -Wcast-align) */ +#ifndef LWIP_ALIGNMENT_CAST +#define LWIP_ALIGNMENT_CAST(target_type, val) LWIP_CONST_CAST(target_type, val) +#endif + +/** Get rid of warnings related to pointer-to-numeric and vice-versa casts, + * e.g. "conversion from 'u8_t' to 'void *' of greater size" + */ +#ifndef LWIP_PTR_NUMERIC_CAST +#define LWIP_PTR_NUMERIC_CAST(target_type, val) LWIP_CONST_CAST(target_type, val) +#endif + +/** Avoid warnings/errors related to implicitly casting away packed attributes by doing a explicit cast */ +#ifndef LWIP_PACKED_CAST +#define LWIP_PACKED_CAST(target_type, val) LWIP_CONST_CAST(target_type, val) +#endif + +/** Allocates a memory buffer of specified size that is of sufficient size to align + * its start address using LWIP_MEM_ALIGN. + * You can declare your own version here e.g. to enforce alignment without adding + * trailing padding bytes (see LWIP_MEM_ALIGN_BUFFER) or your own section placement + * requirements.<br> + * e.g. if you use gcc and need 32 bit alignment:<br> + * #define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[size] __attribute__((aligned(4)))<br> + * or more portable:<br> + * #define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u32_t variable_name[(size + sizeof(u32_t) - 1) / sizeof(u32_t)] + */ +#ifndef LWIP_DECLARE_MEMORY_ALIGNED +#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[LWIP_MEM_ALIGN_BUFFER(size)] +#endif + +/** Calculate memory size for an aligned buffer - returns the next highest + * multiple of MEM_ALIGNMENT (e.g. LWIP_MEM_ALIGN_SIZE(3) and + * LWIP_MEM_ALIGN_SIZE(4) will both yield 4 for MEM_ALIGNMENT == 4). + */ +#ifndef LWIP_MEM_ALIGN_SIZE +#define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1U) & ~(MEM_ALIGNMENT-1U)) +#endif + +/** Calculate safe memory size for an aligned buffer when using an unaligned + * type as storage. This includes a safety-margin on (MEM_ALIGNMENT - 1) at the + * start (e.g. if buffer is u8_t[] and actual data will be u32_t*) + */ +#ifndef LWIP_MEM_ALIGN_BUFFER +#define LWIP_MEM_ALIGN_BUFFER(size) (((size) + MEM_ALIGNMENT - 1U)) +#endif + +/** Align a memory pointer to the alignment defined by MEM_ALIGNMENT + * so that ADDR % MEM_ALIGNMENT == 0 + */ +#ifndef LWIP_MEM_ALIGN +#define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1))) +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/** Packed structs support. + * Placed BEFORE declaration of a packed struct.<br> + * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br> + * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here. + */ +#ifndef PACK_STRUCT_BEGIN +#define PACK_STRUCT_BEGIN +#endif /* PACK_STRUCT_BEGIN */ + +/** Packed structs support. + * Placed AFTER declaration of a packed struct.<br> + * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br> + * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here. + */ +#ifndef PACK_STRUCT_END +#define PACK_STRUCT_END +#endif /* PACK_STRUCT_END */ + +/** Packed structs support. + * Placed between end of declaration of a packed struct and trailing semicolon.<br> + * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br> + * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here. + */ +#ifndef PACK_STRUCT_STRUCT +#if defined(__GNUC__) || defined(__clang__) +#define PACK_STRUCT_STRUCT __attribute__((packed)) +#else +#define PACK_STRUCT_STRUCT +#endif +#endif /* PACK_STRUCT_STRUCT */ + +/** Packed structs support. + * Wraps u32_t and u16_t members.<br> + * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br> + * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here. + */ +#ifndef PACK_STRUCT_FIELD +#define PACK_STRUCT_FIELD(x) x +#endif /* PACK_STRUCT_FIELD */ + +/** Packed structs support. + * Wraps u8_t members, where some compilers warn that packing is not necessary.<br> + * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br> + * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here. + */ +#ifndef PACK_STRUCT_FLD_8 +#define PACK_STRUCT_FLD_8(x) PACK_STRUCT_FIELD(x) +#endif /* PACK_STRUCT_FLD_8 */ + +/** Packed structs support. + * Wraps members that are packed structs themselves, where some compilers warn that packing is not necessary.<br> + * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br> + * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here. + */ +#ifndef PACK_STRUCT_FLD_S +#define PACK_STRUCT_FLD_S(x) PACK_STRUCT_FIELD(x) +#endif /* PACK_STRUCT_FLD_S */ + +/** PACK_STRUCT_USE_INCLUDES==1: Packed structs support using #include files before and after struct to be packed.<br> + * The file included BEFORE the struct is "arch/bpstruct.h".<br> + * The file included AFTER the struct is "arch/epstruct.h".<br> + * This can be used to implement struct packing on MS Visual C compilers, see + * the Win32 port in the lwIP/contrib subdir for reference. + * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br> + * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here. + */ +#ifdef __DOXYGEN__ +#define PACK_STRUCT_USE_INCLUDES +#endif + +/** Eliminates compiler warning about unused arguments (GCC -Wextra -Wunused). */ +#ifndef LWIP_UNUSED_ARG +#define LWIP_UNUSED_ARG(x) (void)x +#endif /* LWIP_UNUSED_ARG */ + +/** LWIP_PROVIDE_ERRNO==1: Let lwIP provide ERRNO values and the 'errno' variable. + * If this is disabled, cc.h must either define 'errno', include <errno.h>, + * define LWIP_ERRNO_STDINCLUDE to get <errno.h> included or + * define LWIP_ERRNO_INCLUDE to <errno.h> or equivalent. + */ +#if defined __DOXYGEN__ +#define LWIP_PROVIDE_ERRNO +#endif + +/* Use a special, reproducable version of rand() for fuzz tests? */ +#ifdef LWIP_RAND_FOR_FUZZ +#ifdef LWIP_RAND +#undef LWIP_RAND +#endif +u32_t lwip_fuzz_rand(void); +#define LWIP_RAND() lwip_fuzz_rand() +#endif + +/** + * @} + */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_ARCH_H */ diff --git a/lib/lwip/include/lwip/autoip.h b/lib/lwip/include/lwip/autoip.h new file mode 100644 index 0000000000..b3f9feb194 --- /dev/null +++ b/lib/lwip/include/lwip/autoip.h @@ -0,0 +1,90 @@ +/** + * @file + * + * AutoIP Automatic LinkLocal IP Configuration + */ + +/* + * + * Copyright (c) 2007 Dominik Spies kontakt@dspies.de + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dominik Spies kontakt@dspies.de + * + * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform + * with RFC 3927. + * + */ + +#ifndef LWIP_HDR_AUTOIP_H +#define LWIP_HDR_AUTOIP_H + +#include "lwip/opt.h" + +#if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/netif.h" +/* #include "lwip/udp.h" */ +#include "lwip/etharp.h" +#include "lwip/acd.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** AutoIP state information per netif */ +struct autoip +{ + /** the currently selected, probed, announced or used LL IP-Address */ + ip4_addr_t llipaddr; + /** current AutoIP state machine state */ + u8_t state; + /** total number of probed/used Link Local IP-Addresses */ + u8_t tried_llipaddr; + /** acd struct */ + struct acd acd; +}; + + +void autoip_set_struct(struct netif *netif, struct autoip *autoip); +void autoip_remove_struct(struct netif *netif); +err_t autoip_start(struct netif *netif); +err_t autoip_stop(struct netif *netif); +void autoip_network_changed_link_up(struct netif *netif); +void autoip_network_changed_link_down(struct netif *netif); +u8_t autoip_supplied_address(struct netif *netif); + +/* for lwIP internal use by ip4.c */ +u8_t autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr); + +#define netif_autoip_data(netif) ((struct autoip*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV4 && LWIP_AUTOIP */ + +#endif /* LWIP_HDR_AUTOIP_H */ diff --git a/lib/lwip/include/lwip/debug.h b/lib/lwip/include/lwip/debug.h new file mode 100644 index 0000000000..0ec7e76ec5 --- /dev/null +++ b/lib/lwip/include/lwip/debug.h @@ -0,0 +1,161 @@ +/** + * @file + * Debug messages infrastructure + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_DEBUG_H +#define LWIP_HDR_DEBUG_H + +#include "lwip/arch.h" +#include "lwip/opt.h" + +/** + * @defgroup debugging_levels LWIP_DBG_MIN_LEVEL and LWIP_DBG_TYPES_ON values + * @ingroup lwip_opts_debugmsg + * @{ + */ + +/** @name Debug level (LWIP_DBG_MIN_LEVEL) + * @{ + */ +/** Debug level: ALL messages*/ +#define LWIP_DBG_LEVEL_ALL 0x00 +/** Debug level: Warnings. bad checksums, dropped packets, ... */ +#define LWIP_DBG_LEVEL_WARNING 0x01 +/** Debug level: Serious. memory allocation failures, ... */ +#define LWIP_DBG_LEVEL_SERIOUS 0x02 +/** Debug level: Severe */ +#define LWIP_DBG_LEVEL_SEVERE 0x03 +/** + * @} + */ + +#define LWIP_DBG_MASK_LEVEL 0x03 +/* compatibility define only */ +#define LWIP_DBG_LEVEL_OFF LWIP_DBG_LEVEL_ALL + +/** @name Enable/disable debug messages completely (LWIP_DBG_TYPES_ON) + * @{ + */ +/** flag for LWIP_DEBUGF to enable that debug message */ +#define LWIP_DBG_ON 0x80U +/** flag for LWIP_DEBUGF to disable that debug message */ +#define LWIP_DBG_OFF 0x00U +/** + * @} + */ + +/** @name Debug message types (LWIP_DBG_TYPES_ON) + * @{ + */ +/** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */ +#define LWIP_DBG_TRACE 0x40U +/** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */ +#define LWIP_DBG_STATE 0x20U +/** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */ +#define LWIP_DBG_FRESH 0x10U +/** flag for LWIP_DEBUGF to halt after printing this debug message */ +#define LWIP_DBG_HALT 0x08U +/** + * @} + */ + +/** + * @} + */ + +/** + * @defgroup lwip_assertions Assertion handling + * @ingroup lwip_opts_debug + * @{ + */ +/** + * LWIP_NOASSERT: Disable LWIP_ASSERT checks: + * To disable assertions define LWIP_NOASSERT in arch/cc.h. + */ +#ifdef __DOXYGEN__ +#define LWIP_NOASSERT +#undef LWIP_NOASSERT +#endif +/** + * @} + */ + +#ifndef LWIP_NOASSERT +#define LWIP_ASSERT(message, assertion) do { if (!(assertion)) { \ + LWIP_PLATFORM_ASSERT(message); }} while(0) +#else /* LWIP_NOASSERT */ +#define LWIP_ASSERT(message, assertion) +#endif /* LWIP_NOASSERT */ + +#ifndef LWIP_ERROR +#ifdef LWIP_DEBUG +#define LWIP_PLATFORM_ERROR(message) LWIP_PLATFORM_DIAG((message)) +#else +#define LWIP_PLATFORM_ERROR(message) +#endif + +/* if "expression" isn't true, then print "message" and execute "handler" expression */ +#define LWIP_ERROR(message, expression, handler) do { if (!(expression)) { \ + LWIP_PLATFORM_ERROR(message); handler;}} while(0) +#endif /* LWIP_ERROR */ + +/** Enable debug message printing, but only if debug message type is enabled + * AND is of correct type AND is at least LWIP_DBG_LEVEL. + */ +#ifdef __DOXYGEN__ +#define LWIP_DEBUG +#undef LWIP_DEBUG +#endif + +#ifdef LWIP_DEBUG +#define LWIP_DEBUG_ENABLED(debug) (((debug) & LWIP_DBG_ON) && \ + ((debug) & LWIP_DBG_TYPES_ON) && \ + ((s16_t)((debug) & LWIP_DBG_MASK_LEVEL) >= LWIP_DBG_MIN_LEVEL)) + +#define LWIP_DEBUGF(debug, message) do { \ + if (LWIP_DEBUG_ENABLED(debug)) { \ + LWIP_PLATFORM_DIAG(message); \ + if ((debug) & LWIP_DBG_HALT) { \ + while(1); \ + } \ + } \ + } while(0) + +#else /* LWIP_DEBUG */ +#define LWIP_DEBUG_ENABLED(debug) 0 +#define LWIP_DEBUGF(debug, message) +#endif /* LWIP_DEBUG */ + +#endif /* LWIP_HDR_DEBUG_H */ diff --git a/lib/lwip/include/lwip/def.h b/lib/lwip/include/lwip/def.h new file mode 100644 index 0000000000..d6bf763079 --- /dev/null +++ b/lib/lwip/include/lwip/def.h @@ -0,0 +1,156 @@ +/** + * @file + * various utility macros + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +/** + * @defgroup perf Performance measurement + * @ingroup sys_layer + * All defines related to this section must not be placed in lwipopts.h, + * but in arch/perf.h! + * Measurement calls made throughout lwip, these can be defined to nothing. + * - PERF_START: start measuring something. + * - PERF_STOP(x): stop measuring something, and record the result. + */ + +#ifndef LWIP_HDR_DEF_H +#define LWIP_HDR_DEF_H + +/* arch.h might define NULL already */ +#include "lwip/arch.h" +#include "lwip/opt.h" +#if LWIP_PERF +#include "arch/perf.h" +#else /* LWIP_PERF */ +#define PERF_START /* null definition */ +#define PERF_STOP(x) /* null definition */ +#endif /* LWIP_PERF */ + +#ifdef __cplusplus +extern "C" { +#endif + +#define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y)) +#define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y)) + +/* Get the number of entries in an array ('x' must NOT be a pointer!) */ +#define LWIP_ARRAYSIZE(x) (sizeof(x)/sizeof((x)[0])) + +/** Create u32_t value from bytes */ +#define LWIP_MAKEU32(a,b,c,d) (((u32_t)((a) & 0xff) << 24) | \ + ((u32_t)((b) & 0xff) << 16) | \ + ((u32_t)((c) & 0xff) << 8) | \ + (u32_t)((d) & 0xff)) + +#ifndef NULL +#ifdef __cplusplus +#define NULL 0 +#else +#define NULL ((void *)0) +#endif +#endif + +#if BYTE_ORDER == BIG_ENDIAN +#define lwip_htons(x) ((u16_t)(x)) +#define lwip_ntohs(x) ((u16_t)(x)) +#define lwip_htonl(x) ((u32_t)(x)) +#define lwip_ntohl(x) ((u32_t)(x)) +#define PP_HTONS(x) ((u16_t)(x)) +#define PP_NTOHS(x) ((u16_t)(x)) +#define PP_HTONL(x) ((u32_t)(x)) +#define PP_NTOHL(x) ((u32_t)(x)) +#else /* BYTE_ORDER != BIG_ENDIAN */ +#ifndef lwip_htons +u16_t lwip_htons(u16_t x); +#endif +#define lwip_ntohs(x) lwip_htons(x) + +#ifndef lwip_htonl +u32_t lwip_htonl(u32_t x); +#endif +#define lwip_ntohl(x) lwip_htonl(x) + +/* These macros should be calculated by the preprocessor and are used + with compile-time constants only (so that there is no little-endian + overhead at runtime). */ +#define PP_HTONS(x) ((u16_t)((((x) & (u16_t)0x00ffU) << 8) | (((x) & (u16_t)0xff00U) >> 8))) +#define PP_NTOHS(x) PP_HTONS(x) +#define PP_HTONL(x) ((((x) & (u32_t)0x000000ffUL) << 24) | \ + (((x) & (u32_t)0x0000ff00UL) << 8) | \ + (((x) & (u32_t)0x00ff0000UL) >> 8) | \ + (((x) & (u32_t)0xff000000UL) >> 24)) +#define PP_NTOHL(x) PP_HTONL(x) +#endif /* BYTE_ORDER == BIG_ENDIAN */ + +/* Provide usual function names as macros for users, but this can be turned off */ +#ifndef LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS +#define htons(x) lwip_htons(x) +#define ntohs(x) lwip_ntohs(x) +#define htonl(x) lwip_htonl(x) +#define ntohl(x) lwip_ntohl(x) +#endif + +/* Functions that are not available as standard implementations. + * In cc.h, you can #define these to implementations available on + * your platform to save some code bytes if you use these functions + * in your application, too. + */ + +#ifndef lwip_itoa +/* This can be #defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform */ +void lwip_itoa(char* result, size_t bufsize, int number); +#endif +#ifndef lwip_strnicmp +/* This can be #defined to strnicmp() or strncasecmp() depending on your platform */ +int lwip_strnicmp(const char* str1, const char* str2, size_t len); +#endif +#ifndef lwip_stricmp +/* This can be #defined to stricmp() or strcasecmp() depending on your platform */ +int lwip_stricmp(const char* str1, const char* str2); +#endif +#ifndef lwip_strnstr +/* This can be #defined to strnstr() depending on your platform */ +char* lwip_strnstr(const char* buffer, const char* token, size_t n); +#endif +#ifndef lwip_strnistr +/* This can be #defined to strnistr() depending on your platform */ +char* lwip_strnistr(const char* buffer, const char* token, size_t n); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_DEF_H */ diff --git a/lib/lwip/include/lwip/dhcp.h b/lib/lwip/include/lwip/dhcp.h new file mode 100644 index 0000000000..b413fa63f9 --- /dev/null +++ b/lib/lwip/include/lwip/dhcp.h @@ -0,0 +1,155 @@ +/** + * @file + * DHCP client API + */ + +/* + * Copyright (c) 2001-2004 Leon Woestenberg leon.woestenberg@gmx.net + * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Leon Woestenberg leon.woestenberg@gmx.net + * + */ +#ifndef LWIP_HDR_DHCP_H +#define LWIP_HDR_DHCP_H + +#include "lwip/opt.h" + +#if LWIP_DHCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/netif.h" +#include "lwip/udp.h" + +#if LWIP_DHCP_DOES_ACD_CHECK +#include "lwip/acd.h" +#endif /* LWIP_DHCP_DOES_ACD_CHECK */ + +#ifdef __cplusplus +extern "C" { +#endif + +/** Define DHCP_TIMEOUT_SIZE_T in opt.h if you want use a different integer than u16_t. + * Especially useful if DHCP_COARSE_TIMER_SECS is in smaller units, so timeouts easily reach UINT16_MAX and more */ +#ifdef DHCP_TIMEOUT_SIZE_T +typedef DHCP_TIMEOUT_SIZE_T dhcp_timeout_t; +#else /* DHCP_TIMEOUT_SIZE_T */ +typedef u16_t dhcp_timeout_t; +#endif /* DHCP_TIMEOUT_SIZE_T*/ +/** period (in seconds) of the application calling dhcp_coarse_tmr() */ +#ifndef DHCP_COARSE_TIMER_SECS +#define DHCP_COARSE_TIMER_SECS 60 +#endif /* DHCP_COARSE_TIMER_SECS */ +/** period (in milliseconds) of the application calling dhcp_coarse_tmr() */ +#define DHCP_COARSE_TIMER_MSECS (DHCP_COARSE_TIMER_SECS * 1000UL) +/** period (in milliseconds) of the application calling dhcp_fine_tmr() */ +#define DHCP_FINE_TIMER_MSECS 500 + +#define DHCP_BOOT_FILE_LEN 128U + +#define DHCP_FLAG_SUBNET_MASK_GIVEN 0x01 +#define DHCP_FLAG_EXTERNAL_MEM 0x02 + +/* AutoIP cooperation flags (struct dhcp.autoip_coop_state) */ +typedef enum { + DHCP_AUTOIP_COOP_STATE_OFF = 0, + DHCP_AUTOIP_COOP_STATE_ON = 1 +} dhcp_autoip_coop_state_enum_t; + +struct dhcp +{ + /** transaction identifier of last sent request */ + u32_t xid; + /** track PCB allocation state */ + u8_t pcb_allocated; + /** current DHCP state machine state */ + u8_t state; + /** retries of current request */ + u8_t tries; + /** see DHCP_FLAG_* */ + u8_t flags; + + dhcp_timeout_t request_timeout; /* #ticks with period DHCP_FINE_TIMER_SECS for request timeout */ + dhcp_timeout_t t1_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for renewal time */ + dhcp_timeout_t t2_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for rebind time */ + dhcp_timeout_t t1_renew_time; /* #ticks with period DHCP_COARSE_TIMER_SECS until next renew try */ + dhcp_timeout_t t2_rebind_time; /* #ticks with period DHCP_COARSE_TIMER_SECS until next rebind try */ + dhcp_timeout_t lease_used; /* #ticks with period DHCP_COARSE_TIMER_SECS since last received DHCP ack */ + dhcp_timeout_t t0_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for lease time */ + ip_addr_t server_ip_addr; /* dhcp server address that offered this lease (ip_addr_t because passed to UDP) */ + ip4_addr_t offered_ip_addr; + ip4_addr_t offered_sn_mask; + ip4_addr_t offered_gw_addr; + + u32_t offered_t0_lease; /* lease period (in seconds) */ + u32_t offered_t1_renew; /* recommended renew time (usually 50% of lease period) */ + u32_t offered_t2_rebind; /* recommended rebind time (usually 87.5 of lease period) */ +#if LWIP_DHCP_BOOTP_FILE + ip4_addr_t offered_si_addr; + char boot_file_name[DHCP_BOOT_FILE_LEN]; +#endif /* LWIP_DHCP_BOOTPFILE */ +#if LWIP_DHCP_DOES_ACD_CHECK + /** acd struct */ + struct acd acd; +#endif /* LWIP_DHCP_DOES_ACD_CHECK */ +}; + + +void dhcp_set_struct(struct netif *netif, struct dhcp *dhcp); +/** Remove a struct dhcp previously set to the netif using dhcp_set_struct() */ +#define dhcp_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, NULL) +void dhcp_cleanup(struct netif *netif); +err_t dhcp_start(struct netif *netif); +err_t dhcp_renew(struct netif *netif); +err_t dhcp_release(struct netif *netif); +void dhcp_stop(struct netif *netif); +void dhcp_release_and_stop(struct netif *netif); +void dhcp_inform(struct netif *netif); +void dhcp_network_changed_link_up(struct netif *netif); + +u8_t dhcp_supplied_address(const struct netif *netif); +/* to be called every minute */ +void dhcp_coarse_tmr(void); +/* to be called every half second */ +void dhcp_fine_tmr(void); + +#if LWIP_DHCP_GET_NTP_SRV +/** This function must exist, in other to add offered NTP servers to + * the NTP (or SNTP) engine. + * See LWIP_DHCP_MAX_NTP_SERVERS */ +extern void dhcp_set_ntp_servers(u8_t num_ntp_servers, const ip4_addr_t* ntp_server_addrs); +#endif /* LWIP_DHCP_GET_NTP_SRV */ + +#define netif_dhcp_data(netif) ((struct dhcp*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_DHCP */ + +#endif /*LWIP_HDR_DHCP_H*/ diff --git a/lib/lwip/include/lwip/dhcp6.h b/lib/lwip/include/lwip/dhcp6.h new file mode 100644 index 0000000000..5cc4a01591 --- /dev/null +++ b/lib/lwip/include/lwip/dhcp6.h @@ -0,0 +1,104 @@ +/** + * @file + * + * DHCPv6 client: IPv6 address autoconfiguration as per + * RFC 3315 (stateful DHCPv6) and + * RFC 3736 (stateless DHCPv6). + */ + +/* + * Copyright (c) 2018 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + */ + +#ifndef LWIP_HDR_IP6_DHCP6_H +#define LWIP_HDR_IP6_DHCP6_H + +#include "lwip/opt.h" + +#if LWIP_IPV6_DHCP6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/err.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** period (in milliseconds) of the application calling dhcp6_tmr() */ +#define DHCP6_TIMER_MSECS 500 + +struct dhcp6 +{ + /** transaction identifier of last sent request */ + u32_t xid; + /** track PCB allocation state */ + u8_t pcb_allocated; + /** current DHCPv6 state machine state */ + u8_t state; + /** retries of current request */ + u8_t tries; + /** if request config is triggered while another action is active, this keeps track of it */ + u8_t request_config_pending; + /** #ticks with period DHCP6_TIMER_MSECS for request timeout */ + u16_t request_timeout; +#if LWIP_IPV6_DHCP6_STATEFUL + /* @todo: add more members here to keep track of stateful DHCPv6 data, like lease times */ +#endif /* LWIP_IPV6_DHCP6_STATEFUL */ +}; + +void dhcp6_set_struct(struct netif *netif, struct dhcp6 *dhcp6); +/** Remove a struct dhcp6 previously set to the netif using dhcp6_set_struct() */ +#define dhcp6_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL) +void dhcp6_cleanup(struct netif *netif); + +err_t dhcp6_enable_stateful(struct netif *netif); +err_t dhcp6_enable_stateless(struct netif *netif); +void dhcp6_disable(struct netif *netif); + +void dhcp6_tmr(void); + +void dhcp6_nd6_ra_trigger(struct netif *netif, u8_t managed_addr_config, u8_t other_config); + +#if LWIP_DHCP6_GET_NTP_SRV +/** This function must exist, in other to add offered NTP servers to + * the NTP (or SNTP) engine. + * See LWIP_DHCP6_MAX_NTP_SERVERS */ +extern void dhcp6_set_ntp_servers(u8_t num_ntp_servers, const ip_addr_t* ntp_server_addrs); +#endif /* LWIP_DHCP6_GET_NTP_SRV */ + +#define netif_dhcp6_data(netif) ((struct dhcp6*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6_DHCP6 */ + +#endif /* LWIP_HDR_IP6_DHCP6_H */ diff --git a/lib/lwip/include/lwip/dns.h b/lib/lwip/include/lwip/dns.h new file mode 100644 index 0000000000..091341544f --- /dev/null +++ b/lib/lwip/include/lwip/dns.h @@ -0,0 +1,131 @@ +/** + * @file + * DNS API + */ + +/** + * lwip DNS resolver header file. + + * Author: Jim Pettinato + * April 2007 + + * ported from uIP resolv.c Copyright (c) 2002-2003, Adam Dunkels. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef LWIP_HDR_DNS_H +#define LWIP_HDR_DNS_H + +#include "lwip/opt.h" + +#if LWIP_DNS + +#include "lwip/ip_addr.h" +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** DNS timer period */ +#define DNS_TMR_INTERVAL 1000 + +/* DNS resolve types: */ +#define LWIP_DNS_ADDRTYPE_IPV4 0 +#define LWIP_DNS_ADDRTYPE_IPV6 1 +#define LWIP_DNS_ADDRTYPE_IPV4_IPV6 2 /* try to resolve IPv4 first, try IPv6 if IPv4 fails only */ +#define LWIP_DNS_ADDRTYPE_IPV6_IPV4 3 /* try to resolve IPv6 first, try IPv4 if IPv6 fails only */ +#if LWIP_IPV4 && LWIP_IPV6 +#ifndef LWIP_DNS_ADDRTYPE_DEFAULT +#define LWIP_DNS_ADDRTYPE_DEFAULT LWIP_DNS_ADDRTYPE_IPV4_IPV6 +#endif +#elif LWIP_IPV4 +#define LWIP_DNS_ADDRTYPE_DEFAULT LWIP_DNS_ADDRTYPE_IPV4 +#else +#define LWIP_DNS_ADDRTYPE_DEFAULT LWIP_DNS_ADDRTYPE_IPV6 +#endif + +#if DNS_LOCAL_HOSTLIST +/** struct used for local host-list */ +struct local_hostlist_entry { + /** static hostname */ + const char *name; + /** static host address in network byteorder */ + ip_addr_t addr; + struct local_hostlist_entry *next; +}; +#define DNS_LOCAL_HOSTLIST_ELEM(name, addr_init) {name, addr_init, NULL} +#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC +#ifndef DNS_LOCAL_HOSTLIST_MAX_NAMELEN +#define DNS_LOCAL_HOSTLIST_MAX_NAMELEN DNS_MAX_NAME_LENGTH +#endif +#define LOCALHOSTLIST_ELEM_SIZE ((sizeof(struct local_hostlist_entry) + DNS_LOCAL_HOSTLIST_MAX_NAMELEN + 1)) +#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ +#endif /* DNS_LOCAL_HOSTLIST */ + +#if LWIP_IPV4 +extern const ip_addr_t dns_mquery_v4group; +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 +extern const ip_addr_t dns_mquery_v6group; +#endif /* LWIP_IPV6 */ + +/** Callback which is invoked when a hostname is found. + * A function of this type must be implemented by the application using the DNS resolver. + * @param name pointer to the name that was looked up. + * @param ipaddr pointer to an ip_addr_t containing the IP address of the hostname, + * or NULL if the name could not be found (or on any other error). + * @param callback_arg a user-specified callback argument passed to dns_gethostbyname +*/ +typedef void (*dns_found_callback)(const char *name, const ip_addr_t *ipaddr, void *callback_arg); + +void dns_init(void); +void dns_tmr(void); +void dns_setserver(u8_t numdns, const ip_addr_t *dnsserver); +const ip_addr_t* dns_getserver(u8_t numdns); +err_t dns_gethostbyname(const char *hostname, ip_addr_t *addr, + dns_found_callback found, void *callback_arg); +err_t dns_gethostbyname_addrtype(const char *hostname, ip_addr_t *addr, + dns_found_callback found, void *callback_arg, + u8_t dns_addrtype); + + +#if DNS_LOCAL_HOSTLIST +size_t dns_local_iterate(dns_found_callback iterator_fn, void *iterator_arg); +err_t dns_local_lookup(const char *hostname, ip_addr_t *addr, u8_t dns_addrtype); +#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC +int dns_local_removehost(const char *hostname, const ip_addr_t *addr); +err_t dns_local_addhost(const char *hostname, const ip_addr_t *addr); +#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ +#endif /* DNS_LOCAL_HOSTLIST */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_DNS */ + +#endif /* LWIP_HDR_DNS_H */ diff --git a/lib/lwip/include/lwip/err.h b/lib/lwip/include/lwip/err.h new file mode 100644 index 0000000000..887d9b3fd8 --- /dev/null +++ b/lib/lwip/include/lwip/err.h @@ -0,0 +1,117 @@ +/** + * @file + * lwIP Error codes + */ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_ERR_H +#define LWIP_HDR_ERR_H + +#include "lwip/opt.h" +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @defgroup infrastructure_errors Error codes + * @ingroup infrastructure + * @{ + */ + +/** Definitions for error constants. */ +typedef enum { +/** No error, everything OK. */ + ERR_OK = 0, +/** Out of memory error. */ + ERR_MEM = -1, +/** Buffer error. */ + ERR_BUF = -2, +/** Timeout. */ + ERR_TIMEOUT = -3, +/** Routing problem. */ + ERR_RTE = -4, +/** Operation in progress */ + ERR_INPROGRESS = -5, +/** Illegal value. */ + ERR_VAL = -6, +/** Operation would block. */ + ERR_WOULDBLOCK = -7, +/** Address in use. */ + ERR_USE = -8, +/** Already connecting. */ + ERR_ALREADY = -9, +/** Conn already established.*/ + ERR_ISCONN = -10, +/** Not connected. */ + ERR_CONN = -11, +/** Low-level netif error */ + ERR_IF = -12, + +/** Connection aborted. */ + ERR_ABRT = -13, +/** Connection reset. */ + ERR_RST = -14, +/** Connection closed. */ + ERR_CLSD = -15, +/** Illegal argument. */ + ERR_ARG = -16 +} err_enum_t; + +/** Define LWIP_ERR_T in cc.h if you want to use + * a different type for your platform (must be signed). */ +#ifdef LWIP_ERR_T +typedef LWIP_ERR_T err_t; +#else /* LWIP_ERR_T */ +typedef s8_t err_t; +#endif /* LWIP_ERR_T*/ + +/** + * @} + */ + +#ifdef LWIP_DEBUG +extern const char *lwip_strerr(err_t err); +#else +#define lwip_strerr(x) "" +#endif /* LWIP_DEBUG */ + +#if !NO_SYS +int err_to_errno(err_t err); +#endif /* !NO_SYS */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_ERR_H */ diff --git a/lib/lwip/include/lwip/errno.h b/lib/lwip/include/lwip/errno.h new file mode 100644 index 0000000000..48d6b539d8 --- /dev/null +++ b/lib/lwip/include/lwip/errno.h @@ -0,0 +1,198 @@ +/** + * @file + * Posix Errno defines + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_ERRNO_H +#define LWIP_HDR_ERRNO_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef LWIP_PROVIDE_ERRNO + +#define EPERM 1 /* Operation not permitted */ +#define ENOENT 2 /* No such file or directory */ +#define ESRCH 3 /* No such process */ +#define EINTR 4 /* Interrupted system call */ +#define EIO 5 /* I/O error */ +#define ENXIO 6 /* No such device or address */ +#define E2BIG 7 /* Arg list too long */ +#define ENOEXEC 8 /* Exec format error */ +#define EBADF 9 /* Bad file number */ +#define ECHILD 10 /* No child processes */ +#define EAGAIN 11 /* Try again */ +#define ENOMEM 12 /* Out of memory */ +#define EACCES 13 /* Permission denied */ +#define EFAULT 14 /* Bad address */ +#define ENOTBLK 15 /* Block device required */ +#define EBUSY 16 /* Device or resource busy */ +#define EEXIST 17 /* File exists */ +#define EXDEV 18 /* Cross-device link */ +#define ENODEV 19 /* No such device */ +#define ENOTDIR 20 /* Not a directory */ +#define EISDIR 21 /* Is a directory */ +#define EINVAL 22 /* Invalid argument */ +#define ENFILE 23 /* File table overflow */ +#define EMFILE 24 /* Too many open files */ +#define ENOTTY 25 /* Not a typewriter */ +#define ETXTBSY 26 /* Text file busy */ +#define EFBIG 27 /* File too large */ +#define ENOSPC 28 /* No space left on device */ +#define ESPIPE 29 /* Illegal seek */ +#define EROFS 30 /* Read-only file system */ +#define EMLINK 31 /* Too many links */ +#define EPIPE 32 /* Broken pipe */ +#define EDOM 33 /* Math argument out of domain of func */ +#define ERANGE 34 /* Math result not representable */ +#define EDEADLK 35 /* Resource deadlock would occur */ +#define ENAMETOOLONG 36 /* File name too long */ +#define ENOLCK 37 /* No record locks available */ +#define ENOSYS 38 /* Function not implemented */ +#define ENOTEMPTY 39 /* Directory not empty */ +#define ELOOP 40 /* Too many symbolic links encountered */ +#define EWOULDBLOCK EAGAIN /* Operation would block */ +#define ENOMSG 42 /* No message of desired type */ +#define EIDRM 43 /* Identifier removed */ +#define ECHRNG 44 /* Channel number out of range */ +#define EL2NSYNC 45 /* Level 2 not synchronized */ +#define EL3HLT 46 /* Level 3 halted */ +#define EL3RST 47 /* Level 3 reset */ +#define ELNRNG 48 /* Link number out of range */ +#define EUNATCH 49 /* Protocol driver not attached */ +#define ENOCSI 50 /* No CSI structure available */ +#define EL2HLT 51 /* Level 2 halted */ +#define EBADE 52 /* Invalid exchange */ +#define EBADR 53 /* Invalid request descriptor */ +#define EXFULL 54 /* Exchange full */ +#define ENOANO 55 /* No anode */ +#define EBADRQC 56 /* Invalid request code */ +#define EBADSLT 57 /* Invalid slot */ + +#define EDEADLOCK EDEADLK + +#define EBFONT 59 /* Bad font file format */ +#define ENOSTR 60 /* Device not a stream */ +#define ENODATA 61 /* No data available */ +#define ETIME 62 /* Timer expired */ +#define ENOSR 63 /* Out of streams resources */ +#define ENONET 64 /* Machine is not on the network */ +#define ENOPKG 65 /* Package not installed */ +#define EREMOTE 66 /* Object is remote */ +#define ENOLINK 67 /* Link has been severed */ +#define EADV 68 /* Advertise error */ +#define ESRMNT 69 /* Srmount error */ +#define ECOMM 70 /* Communication error on send */ +#define EPROTO 71 /* Protocol error */ +#define EMULTIHOP 72 /* Multihop attempted */ +#define EDOTDOT 73 /* RFS specific error */ +#define EBADMSG 74 /* Not a data message */ +#define EOVERFLOW 75 /* Value too large for defined data type */ +#define ENOTUNIQ 76 /* Name not unique on network */ +#define EBADFD 77 /* File descriptor in bad state */ +#define EREMCHG 78 /* Remote address changed */ +#define ELIBACC 79 /* Can not access a needed shared library */ +#define ELIBBAD 80 /* Accessing a corrupted shared library */ +#define ELIBSCN 81 /* .lib section in a.out corrupted */ +#define ELIBMAX 82 /* Attempting to link in too many shared libraries */ +#define ELIBEXEC 83 /* Cannot exec a shared library directly */ +#define EILSEQ 84 /* Illegal byte sequence */ +#define ERESTART 85 /* Interrupted system call should be restarted */ +#define ESTRPIPE 86 /* Streams pipe error */ +#define EUSERS 87 /* Too many users */ +#define ENOTSOCK 88 /* Socket operation on non-socket */ +#define EDESTADDRREQ 89 /* Destination address required */ +#define EMSGSIZE 90 /* Message too long */ +#define EPROTOTYPE 91 /* Protocol wrong type for socket */ +#define ENOPROTOOPT 92 /* Protocol not available */ +#define EPROTONOSUPPORT 93 /* Protocol not supported */ +#define ESOCKTNOSUPPORT 94 /* Socket type not supported */ +#define EOPNOTSUPP 95 /* Operation not supported on transport endpoint */ +#define EPFNOSUPPORT 96 /* Protocol family not supported */ +#define EAFNOSUPPORT 97 /* Address family not supported by protocol */ +#define EADDRINUSE 98 /* Address already in use */ +#define EADDRNOTAVAIL 99 /* Cannot assign requested address */ +#define ENETDOWN 100 /* Network is down */ +#define ENETUNREACH 101 /* Network is unreachable */ +#define ENETRESET 102 /* Network dropped connection because of reset */ +#define ECONNABORTED 103 /* Software caused connection abort */ +#define ECONNRESET 104 /* Connection reset by peer */ +#define ENOBUFS 105 /* No buffer space available */ +#define EISCONN 106 /* Transport endpoint is already connected */ +#define ENOTCONN 107 /* Transport endpoint is not connected */ +#define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */ +#define ETOOMANYREFS 109 /* Too many references: cannot splice */ +#define ETIMEDOUT 110 /* Connection timed out */ +#define ECONNREFUSED 111 /* Connection refused */ +#define EHOSTDOWN 112 /* Host is down */ +#define EHOSTUNREACH 113 /* No route to host */ +#define EALREADY 114 /* Operation already in progress */ +#define EINPROGRESS 115 /* Operation now in progress */ +#define ESTALE 116 /* Stale NFS file handle */ +#define EUCLEAN 117 /* Structure needs cleaning */ +#define ENOTNAM 118 /* Not a XENIX named type file */ +#define ENAVAIL 119 /* No XENIX semaphores available */ +#define EISNAM 120 /* Is a named type file */ +#define EREMOTEIO 121 /* Remote I/O error */ +#define EDQUOT 122 /* Quota exceeded */ + +#define ENOMEDIUM 123 /* No medium found */ +#define EMEDIUMTYPE 124 /* Wrong medium type */ + +#ifndef errno +extern int errno; +#endif + +#else /* LWIP_PROVIDE_ERRNO */ + +/* Define LWIP_ERRNO_STDINCLUDE if you want to include <errno.h> here */ +#ifdef LWIP_ERRNO_STDINCLUDE +#include <errno.h> +#else /* LWIP_ERRNO_STDINCLUDE */ +/* Define LWIP_ERRNO_INCLUDE to an equivalent of <errno.h> to include the error defines here */ +#ifdef LWIP_ERRNO_INCLUDE +#include LWIP_ERRNO_INCLUDE +#endif /* LWIP_ERRNO_INCLUDE */ +#endif /* LWIP_ERRNO_STDINCLUDE */ + +#endif /* LWIP_PROVIDE_ERRNO */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_ERRNO_H */ diff --git a/lib/lwip/include/lwip/etharp.h b/lib/lwip/include/lwip/etharp.h new file mode 100644 index 0000000000..48a1d229e3 --- /dev/null +++ b/lib/lwip/include/lwip/etharp.h @@ -0,0 +1,110 @@ +/** + * @file + * Ethernet output function - handles OUTGOING ethernet level traffic, implements + * ARP resolving. + * To be used in most low-level netif implementations + */ + +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * Copyright (c) 2003-2004 Leon Woestenberg leon.woestenberg@axon.tv + * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#ifndef LWIP_HDR_NETIF_ETHARP_H +#define LWIP_HDR_NETIF_ETHARP_H + +#include "lwip/opt.h" + +#if LWIP_ARP || LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/pbuf.h" +#include "lwip/ip4_addr.h" +#include "lwip/netif.h" +#include "lwip/ip4.h" +#include "lwip/prot/ethernet.h" + +#if LWIP_IPV4 && LWIP_ARP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/prot/etharp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** 1 seconds period */ +#define ARP_TMR_INTERVAL 1000 + +#if ARP_QUEUEING +/** struct for queueing outgoing packets for unknown address + * defined here to be accessed by memp.h + */ +struct etharp_q_entry { + struct etharp_q_entry *next; + struct pbuf *p; +}; +#endif /* ARP_QUEUEING */ + +#define etharp_init() /* Compatibility define, no init needed. */ +void etharp_tmr(void); +ssize_t etharp_find_addr(struct netif *netif, const ip4_addr_t *ipaddr, + struct eth_addr **eth_ret, const ip4_addr_t **ip_ret); +int etharp_get_entry(size_t i, ip4_addr_t **ipaddr, struct netif **netif, struct eth_addr **eth_ret); +err_t etharp_output(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr); +err_t etharp_query(struct netif *netif, const ip4_addr_t *ipaddr, struct pbuf *q); +err_t etharp_request(struct netif *netif, const ip4_addr_t *ipaddr); +/** For Ethernet network interfaces, we might want to send "gratuitous ARP"; + * this is an ARP packet sent by a node in order to spontaneously cause other + * nodes to update an entry in their ARP cache. + * From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */ +#define etharp_gratuitous(netif) etharp_request((netif), netif_ip4_addr(netif)) +void etharp_cleanup_netif(struct netif *netif); + +#if LWIP_ACD +err_t etharp_acd_probe(struct netif *netif, const ip4_addr_t *ipaddr); +err_t etharp_acd_announce(struct netif *netif, const ip4_addr_t *ipaddr); +#endif /* LWIP_ACD */ + +#if ETHARP_SUPPORT_STATIC_ENTRIES +err_t etharp_add_static_entry(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr); +err_t etharp_remove_static_entry(const ip4_addr_t *ipaddr); +#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */ + +void etharp_input(struct pbuf *p, struct netif *netif); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV4 && LWIP_ARP */ +#endif /* LWIP_ARP || LWIP_ETHERNET */ + +#endif /* LWIP_HDR_NETIF_ETHARP_H */ diff --git a/lib/lwip/include/lwip/ethip6.h b/lib/lwip/include/lwip/ethip6.h new file mode 100644 index 0000000000..5e88dffd05 --- /dev/null +++ b/lib/lwip/include/lwip/ethip6.h @@ -0,0 +1,68 @@ +/** + * @file + * + * Ethernet output for IPv6. Uses ND tables for link-layer addressing. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#ifndef LWIP_HDR_ETHIP6_H +#define LWIP_HDR_ETHIP6_H + +#include "lwip/opt.h" + +#if LWIP_IPV6 && LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/pbuf.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/netif.h" + + +#ifdef __cplusplus +extern "C" { +#endif + + +err_t ethip6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 && LWIP_ETHERNET */ + +#endif /* LWIP_HDR_ETHIP6_H */ diff --git a/lib/lwip/include/lwip/icmp.h b/lib/lwip/include/lwip/icmp.h new file mode 100644 index 0000000000..f5a31fd4c0 --- /dev/null +++ b/lib/lwip/include/lwip/icmp.h @@ -0,0 +1,110 @@ +/** + * @file + * ICMP API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_ICMP_H +#define LWIP_HDR_ICMP_H + +#include "lwip/opt.h" +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/prot/icmp.h" + +#if LWIP_IPV6 && LWIP_ICMP6 +#include "lwip/icmp6.h" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/** ICMP destination unreachable codes */ +enum icmp_dur_type { + /** net unreachable */ + ICMP_DUR_NET = 0, + /** host unreachable */ + ICMP_DUR_HOST = 1, + /** protocol unreachable */ + ICMP_DUR_PROTO = 2, + /** port unreachable */ + ICMP_DUR_PORT = 3, + /** fragmentation needed and DF set */ + ICMP_DUR_FRAG = 4, + /** source route failed */ + ICMP_DUR_SR = 5 +}; + +/** ICMP time exceeded codes */ +enum icmp_te_type { + /** time to live exceeded in transit */ + ICMP_TE_TTL = 0, + /** fragment reassembly time exceeded */ + ICMP_TE_FRAG = 1 +}; + +#if LWIP_IPV4 && LWIP_ICMP /* don't build if not configured for use in lwipopts.h */ + +void icmp_input(struct pbuf *p, struct netif *inp); +void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t); +void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t); + +#endif /* LWIP_IPV4 && LWIP_ICMP */ + +#if LWIP_IPV4 && LWIP_IPV6 +#if LWIP_ICMP && LWIP_ICMP6 +#define icmp_port_unreach(isipv6, pbuf) ((isipv6) ? \ + icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT) : \ + icmp_dest_unreach(pbuf, ICMP_DUR_PORT)) +#elif LWIP_ICMP +#define icmp_port_unreach(isipv6, pbuf) do{ if(!(isipv6)) { icmp_dest_unreach(pbuf, ICMP_DUR_PORT);}}while(0) +#elif LWIP_ICMP6 +#define icmp_port_unreach(isipv6, pbuf) do{ if(isipv6) { icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT);}}while(0) +#else +#define icmp_port_unreach(isipv6, pbuf) +#endif +#elif LWIP_IPV6 && LWIP_ICMP6 +#define icmp_port_unreach(isipv6, pbuf) icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT) +#elif LWIP_IPV4 && LWIP_ICMP +#define icmp_port_unreach(isipv6, pbuf) icmp_dest_unreach(pbuf, ICMP_DUR_PORT) +#else /* (LWIP_IPV6 && LWIP_ICMP6) || (LWIP_IPV4 && LWIP_ICMP) */ +#define icmp_port_unreach(isipv6, pbuf) +#endif /* (LWIP_IPV6 && LWIP_ICMP6) || (LWIP_IPV4 && LWIP_ICMP) LWIP_IPV4*/ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_ICMP_H */ diff --git a/lib/lwip/include/lwip/icmp6.h b/lib/lwip/include/lwip/icmp6.h new file mode 100644 index 0000000000..0ccb78994d --- /dev/null +++ b/lib/lwip/include/lwip/icmp6.h @@ -0,0 +1,72 @@ +/** + * @file + * + * IPv6 version of ICMP, as per RFC 4443. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ +#ifndef LWIP_HDR_ICMP6_H +#define LWIP_HDR_ICMP6_H + +#include "lwip/opt.h" +#include "lwip/pbuf.h" +#include "lwip/ip6_addr.h" +#include "lwip/netif.h" +#include "lwip/prot/icmp6.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_ICMP6 && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +void icmp6_input(struct pbuf *p, struct netif *inp); +void icmp6_dest_unreach(struct pbuf *p, enum icmp6_dur_code c); +void icmp6_packet_too_big(struct pbuf *p, u32_t mtu); +void icmp6_time_exceeded(struct pbuf *p, enum icmp6_te_code c); +void icmp6_time_exceeded_with_addrs(struct pbuf *p, enum icmp6_te_code c, + const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr); +void icmp6_param_problem(struct pbuf *p, enum icmp6_pp_code c, const void *pointer); + +#endif /* LWIP_ICMP6 && LWIP_IPV6 */ + + +#ifdef __cplusplus +} +#endif + + +#endif /* LWIP_HDR_ICMP6_H */ diff --git a/lib/lwip/include/lwip/if_api.h b/lib/lwip/include/lwip/if_api.h new file mode 100644 index 0000000000..b7269e2a62 --- /dev/null +++ b/lib/lwip/include/lwip/if_api.h @@ -0,0 +1,70 @@ +/** + * @file + * Interface Identification APIs from: + * RFC 3493: Basic Socket Interface Extensions for IPv6 + * Section 4: Interface Identification + */ + +/* + * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. joel.cunningham@garmin.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Joel Cunningham joel.cunningham@me.com + * + */ +#ifndef LWIP_HDR_IF_H +#define LWIP_HDR_IF_H + +#include "lwip/opt.h" + +#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef IF_NAMESIZE +#define IF_NAMESIZE NETIF_NAMESIZE +#endif + +char * lwip_if_indextoname(unsigned int ifindex, char *ifname); +unsigned int lwip_if_nametoindex(const char *ifname); + +#if LWIP_COMPAT_SOCKETS +#define if_indextoname(ifindex, ifname) lwip_if_indextoname(ifindex,ifname) +#define if_nametoindex(ifname) lwip_if_nametoindex(ifname) +#endif /* LWIP_COMPAT_SOCKETS */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SOCKET */ + +#endif /* LWIP_HDR_IF_H */ diff --git a/lib/lwip/include/lwip/igmp.h b/lib/lwip/include/lwip/igmp.h new file mode 100644 index 0000000000..0a16db0397 --- /dev/null +++ b/lib/lwip/include/lwip/igmp.h @@ -0,0 +1,115 @@ +/** + * @file + * IGMP API + */ + +/* + * Copyright (c) 2002 CITEL Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is a contribution to the lwIP TCP/IP stack. + * The Swedish Institute of Computer Science and Adam Dunkels + * are specifically granted permission to redistribute this + * source code. +*/ + +#ifndef LWIP_HDR_IGMP_H +#define LWIP_HDR_IGMP_H + +#include "lwip/opt.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/pbuf.h" + +#if LWIP_IPV4 && LWIP_IGMP /* don't build if not configured for use in lwipopts.h */ + +#ifdef __cplusplus +extern "C" { +#endif + +/* IGMP timer */ +#define IGMP_TMR_INTERVAL 100 /* Milliseconds */ +#define IGMP_V1_DELAYING_MEMBER_TMR (1000/IGMP_TMR_INTERVAL) +#define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL) + +/* Compatibility defines (don't use for new code) */ +#define IGMP_DEL_MAC_FILTER NETIF_DEL_MAC_FILTER +#define IGMP_ADD_MAC_FILTER NETIF_ADD_MAC_FILTER + +/** + * igmp group structure - there is + * a list of groups for each interface + * these should really be linked from the interface, but + * if we keep them separate we will not affect the lwip original code + * too much + * + * There will be a group for the all systems group address but this + * will not run the state machine as it is used to kick off reports + * from all the other groups + */ +struct igmp_group { + /** next link */ + struct igmp_group *next; + /** multicast address */ + ip4_addr_t group_address; + /** signifies we were the last person to report */ + u8_t last_reporter_flag; + /** current state of the group */ + u8_t group_state; + /** timer for reporting, negative is OFF */ + u16_t timer; + /** counter of simultaneous uses */ + u8_t use; +}; + +/* Prototypes */ +void igmp_init(void); +err_t igmp_start(struct netif *netif); +err_t igmp_stop(struct netif *netif); +void igmp_report_groups(struct netif *netif); +struct igmp_group *igmp_lookfor_group(struct netif *ifp, const ip4_addr_t *addr); +void igmp_input(struct pbuf *p, struct netif *inp, const ip4_addr_t *dest); +err_t igmp_joingroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr); +err_t igmp_joingroup_netif(struct netif *netif, const ip4_addr_t *groupaddr); +err_t igmp_leavegroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr); +err_t igmp_leavegroup_netif(struct netif *netif, const ip4_addr_t *groupaddr); +void igmp_tmr(void); + +/** @ingroup igmp + * Get list head of IGMP groups for netif. + * Note: The allsystems group IP is contained in the list as first entry. + * @see @ref netif_set_igmp_mac_filter() + */ +#define netif_igmp_data(netif) ((struct igmp_group *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_IGMP)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV4 && LWIP_IGMP */ + +#endif /* LWIP_HDR_IGMP_H */ diff --git a/lib/lwip/include/lwip/inet.h b/lib/lwip/include/lwip/inet.h new file mode 100644 index 0000000000..097088550d --- /dev/null +++ b/lib/lwip/include/lwip/inet.h @@ -0,0 +1,188 @@ +/** + * @file + * This file (together with sockets.h) aims to provide structs and functions from + * - arpa/inet.h + * - netinet/in.h + * + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_INET_H +#define LWIP_HDR_INET_H + +#include "lwip/opt.h" + +#if LWIP_SOCKET_EXTERNAL_HEADERS +#include LWIP_SOCKET_EXTERNAL_HEADER_INET_H +#else /* LWIP_SOCKET_EXTERNAL_HEADERS */ + +#include "lwip/def.h" +#include "lwip/ip_addr.h" +#include "lwip/ip6_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* If your port already typedef's in_addr_t, define IN_ADDR_T_DEFINED + to prevent this code from redefining it. */ +#if !defined(in_addr_t) && !defined(IN_ADDR_T_DEFINED) +typedef u32_t in_addr_t; +#endif + +struct in_addr { + in_addr_t s_addr; +}; + +struct in6_addr { + union { + u32_t u32_addr[4]; + u8_t u8_addr[16]; + } un; +#define s6_addr un.u8_addr +}; + +/** 255.255.255.255 */ +#define INADDR_NONE IPADDR_NONE +/** 127.0.0.1 */ +#define INADDR_LOOPBACK IPADDR_LOOPBACK +/** 0.0.0.0 */ +#define INADDR_ANY IPADDR_ANY +/** 255.255.255.255 */ +#define INADDR_BROADCAST IPADDR_BROADCAST + +/** This macro can be used to initialize a variable of type struct in6_addr + to the IPv6 wildcard address. */ +#define IN6ADDR_ANY_INIT {{{0,0,0,0}}} +/** This macro can be used to initialize a variable of type struct in6_addr + to the IPv6 loopback address. */ +#define IN6ADDR_LOOPBACK_INIT {{{0,0,0,PP_HTONL(1)}}} +/** This variable is initialized by the system to contain the wildcard IPv6 address. */ +extern const struct in6_addr in6addr_any; + +/* Definitions of the bits in an (IPv4) Internet address integer. + + On subnets, host and network parts are found according to + the subnet mask, not these masks. */ +#define IN_CLASSA(a) IP_CLASSA(a) +#define IN_CLASSA_NET IP_CLASSA_NET +#define IN_CLASSA_NSHIFT IP_CLASSA_NSHIFT +#define IN_CLASSA_HOST IP_CLASSA_HOST +#define IN_CLASSA_MAX IP_CLASSA_MAX + +#define IN_CLASSB(b) IP_CLASSB(b) +#define IN_CLASSB_NET IP_CLASSB_NET +#define IN_CLASSB_NSHIFT IP_CLASSB_NSHIFT +#define IN_CLASSB_HOST IP_CLASSB_HOST +#define IN_CLASSB_MAX IP_CLASSB_MAX + +#define IN_CLASSC(c) IP_CLASSC(c) +#define IN_CLASSC_NET IP_CLASSC_NET +#define IN_CLASSC_NSHIFT IP_CLASSC_NSHIFT +#define IN_CLASSC_HOST IP_CLASSC_HOST +#define IN_CLASSC_MAX IP_CLASSC_MAX + +#define IN_CLASSD(d) IP_CLASSD(d) +#define IN_CLASSD_NET IP_CLASSD_NET /* These ones aren't really */ +#define IN_CLASSD_NSHIFT IP_CLASSD_NSHIFT /* net and host fields, but */ +#define IN_CLASSD_HOST IP_CLASSD_HOST /* routing needn't know. */ +#define IN_CLASSD_MAX IP_CLASSD_MAX + +#define IN_MULTICAST(a) IP_MULTICAST(a) + +#define IN_EXPERIMENTAL(a) IP_EXPERIMENTAL(a) +#define IN_BADCLASS(a) IP_BADCLASS(a) + +#define IN_LOOPBACKNET IP_LOOPBACKNET + +#define IN6_IS_ADDR_UNSPECIFIED(a) ip6_addr_isany((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_LOOPBACK(a) ip6_addr_isloopback((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_MULTICAST(a) ip6_addr_ismulticast((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_LINKLOCAL(a) ip6_addr_islinklocal((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_SITELOCAL(a) ip6_addr_issitelocal((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_V4MAPPED(a) ip6_addr_isipv4mappedipv6((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_V4COMPAT(a) ip6_addr_isipv4compat((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_MC_NODELOCAL(a) ip6_addr_ismulticast_iflocal((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_MC_LINKLOCAL(a) ip6_addr_ismulticast_linklocal((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_MC_SITELOCAL(a) ip6_addr_ismulticast_sitelocal((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_MC_ORGLOCAL(a) ip6_addr_ismulticast_orglocal((ip6_addr_t*)(a)) +#define IN6_IS_ADDR_MC_GLOBAL(a) ip6_addr_ismulticast_global((ip6_addr_t*)(a)) + +#ifndef INET_ADDRSTRLEN +#define INET_ADDRSTRLEN IP4ADDR_STRLEN_MAX +#endif +#if LWIP_IPV6 +#ifndef INET6_ADDRSTRLEN +#define INET6_ADDRSTRLEN IP6ADDR_STRLEN_MAX +#endif +#endif + +#if LWIP_IPV4 + +#define inet_addr_from_ip4addr(target_inaddr, source_ipaddr) ((target_inaddr)->s_addr = ip4_addr_get_u32(source_ipaddr)) +#define inet_addr_to_ip4addr(target_ipaddr, source_inaddr) (ip4_addr_set_u32(target_ipaddr, (source_inaddr)->s_addr)) + +/* directly map this to the lwip internal functions */ +#define inet_addr(cp) ipaddr_addr(cp) +#define inet_aton(cp, addr) ip4addr_aton(cp, (ip4_addr_t*)addr) +#define inet_ntoa(addr) ip4addr_ntoa((const ip4_addr_t*)&(addr)) +#define inet_ntoa_r(addr, buf, buflen) ip4addr_ntoa_r((const ip4_addr_t*)&(addr), buf, buflen) + +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +#define inet6_addr_from_ip6addr(target_in6addr, source_ip6addr) {(target_in6addr)->un.u32_addr[0] = (source_ip6addr)->addr[0]; \ + (target_in6addr)->un.u32_addr[1] = (source_ip6addr)->addr[1]; \ + (target_in6addr)->un.u32_addr[2] = (source_ip6addr)->addr[2]; \ + (target_in6addr)->un.u32_addr[3] = (source_ip6addr)->addr[3];} +#define inet6_addr_to_ip6addr(target_ip6addr, source_in6addr) {(target_ip6addr)->addr[0] = (source_in6addr)->un.u32_addr[0]; \ + (target_ip6addr)->addr[1] = (source_in6addr)->un.u32_addr[1]; \ + (target_ip6addr)->addr[2] = (source_in6addr)->un.u32_addr[2]; \ + (target_ip6addr)->addr[3] = (source_in6addr)->un.u32_addr[3]; \ + ip6_addr_clear_zone(target_ip6addr);} + +/* directly map this to the lwip internal functions */ +#define inet6_aton(cp, addr) ip6addr_aton(cp, (ip6_addr_t*)addr) +#define inet6_ntoa(addr) ip6addr_ntoa((const ip6_addr_t*)&(addr)) +#define inet6_ntoa_r(addr, buf, buflen) ip6addr_ntoa_r((const ip6_addr_t*)&(addr), buf, buflen) + +#endif /* LWIP_IPV6 */ + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SOCKET_EXTERNAL_HEADERS */ + +#endif /* LWIP_HDR_INET_H */ diff --git a/lib/lwip/include/lwip/inet_chksum.h b/lib/lwip/include/lwip/inet_chksum.h new file mode 100644 index 0000000000..33296d287b --- /dev/null +++ b/lib/lwip/include/lwip/inet_chksum.h @@ -0,0 +1,104 @@ +/** + * @file + * IP checksum calculation functions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_INET_CHKSUM_H +#define LWIP_HDR_INET_CHKSUM_H + +#include "lwip/opt.h" + +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" + +/** Swap the bytes in an u16_t: much like lwip_htons() for little-endian */ +#ifndef SWAP_BYTES_IN_WORD +#define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8) +#endif /* SWAP_BYTES_IN_WORD */ + +/** Split an u32_t in two u16_ts and add them up */ +#ifndef FOLD_U32T +#define FOLD_U32T(u) ((u32_t)(((u) >> 16) + ((u) & 0x0000ffffUL))) +#endif + +#if LWIP_CHECKSUM_ON_COPY +/** Function-like macro: same as MEMCPY but returns the checksum of copied data + as u16_t */ +# ifndef LWIP_CHKSUM_COPY +# define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len) +# ifndef LWIP_CHKSUM_COPY_ALGORITHM +# define LWIP_CHKSUM_COPY_ALGORITHM 1 +# endif /* LWIP_CHKSUM_COPY_ALGORITHM */ +# else /* LWIP_CHKSUM_COPY */ +# define LWIP_CHKSUM_COPY_ALGORITHM 0 +# endif /* LWIP_CHKSUM_COPY */ +#else /* LWIP_CHECKSUM_ON_COPY */ +# define LWIP_CHKSUM_COPY_ALGORITHM 0 +#endif /* LWIP_CHECKSUM_ON_COPY */ + +#ifdef __cplusplus +extern "C" { +#endif + +u16_t inet_chksum(const void *dataptr, u16_t len); +u16_t inet_chksum_pbuf(struct pbuf *p); +#if LWIP_CHKSUM_COPY_ALGORITHM +u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len); +#endif /* LWIP_CHKSUM_COPY_ALGORITHM */ + +#if LWIP_IPV4 +u16_t inet_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len, + const ip4_addr_t *src, const ip4_addr_t *dest); +u16_t inet_chksum_pseudo_partial(struct pbuf *p, u8_t proto, + u16_t proto_len, u16_t chksum_len, const ip4_addr_t *src, const ip4_addr_t *dest); +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +u16_t ip6_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len, + const ip6_addr_t *src, const ip6_addr_t *dest); +u16_t ip6_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len, + u16_t chksum_len, const ip6_addr_t *src, const ip6_addr_t *dest); +#endif /* LWIP_IPV6 */ + + +u16_t ip_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len, + const ip_addr_t *src, const ip_addr_t *dest); +u16_t ip_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len, + u16_t chksum_len, const ip_addr_t *src, const ip_addr_t *dest); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_INET_H */ diff --git a/lib/lwip/include/lwip/init.h b/lib/lwip/include/lwip/init.h new file mode 100644 index 0000000000..43e5e04f23 --- /dev/null +++ b/lib/lwip/include/lwip/init.h @@ -0,0 +1,100 @@ +/** + * @file + * lwIP initialization API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_INIT_H +#define LWIP_HDR_INIT_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @defgroup lwip_version Version + * @ingroup lwip + * @{ + */ + +/** X.x.x: Major version of the stack */ +#define LWIP_VERSION_MAJOR 2 +/** x.X.x: Minor version of the stack */ +#define LWIP_VERSION_MINOR 2 +/** x.x.X: Revision of the stack */ +#define LWIP_VERSION_REVISION 0 +/** For release candidates, this is set to 1..254 + * For official releases, this is set to 255 (LWIP_RC_RELEASE) + * For development versions (Git), this is set to 0 (LWIP_RC_DEVELOPMENT) */ +#define LWIP_VERSION_RC LWIP_RC_RELEASE + +/** LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases */ +#define LWIP_RC_RELEASE 255 +/** LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for Git versions */ +#define LWIP_RC_DEVELOPMENT 0 + +#define LWIP_VERSION_IS_RELEASE (LWIP_VERSION_RC == LWIP_RC_RELEASE) +#define LWIP_VERSION_IS_DEVELOPMENT (LWIP_VERSION_RC == LWIP_RC_DEVELOPMENT) +#define LWIP_VERSION_IS_RC ((LWIP_VERSION_RC != LWIP_RC_RELEASE) && (LWIP_VERSION_RC != LWIP_RC_DEVELOPMENT)) + +/* Some helper defines to get a version string */ +#define LWIP_VERSTR2(x) #x +#define LWIP_VERSTR(x) LWIP_VERSTR2(x) +#if LWIP_VERSION_IS_RELEASE +#define LWIP_VERSION_STRING_SUFFIX "" +#elif LWIP_VERSION_IS_DEVELOPMENT +#define LWIP_VERSION_STRING_SUFFIX "d" +#else +#define LWIP_VERSION_STRING_SUFFIX "rc" LWIP_VERSTR(LWIP_VERSION_RC) +#endif + +/** Provides the version of the stack */ +#define LWIP_VERSION ((LWIP_VERSION_MAJOR) << 24 | (LWIP_VERSION_MINOR) << 16 | \ + (LWIP_VERSION_REVISION) << 8 | (LWIP_VERSION_RC)) +/** Provides the version of the stack as string */ +#define LWIP_VERSION_STRING LWIP_VERSTR(LWIP_VERSION_MAJOR) "." LWIP_VERSTR(LWIP_VERSION_MINOR) "." LWIP_VERSTR(LWIP_VERSION_REVISION) LWIP_VERSION_STRING_SUFFIX + +/** + * @} + */ + +/* Modules initialization */ +void lwip_init(void); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_INIT_H */ diff --git a/lib/lwip/include/lwip/init.h.cmake.in b/lib/lwip/include/lwip/init.h.cmake.in new file mode 100644 index 0000000000..9b609b7426 --- /dev/null +++ b/lib/lwip/include/lwip/init.h.cmake.in @@ -0,0 +1,100 @@ +/** + * @file + * lwIP initialization API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_INIT_H +#define LWIP_HDR_INIT_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @defgroup lwip_version Version + * @ingroup lwip + * @{ + */ + +/** X.x.x: Major version of the stack */ +#define LWIP_VERSION_MAJOR ${LWIP_VERSION_MAJOR} +/** x.X.x: Minor version of the stack */ +#define LWIP_VERSION_MINOR ${LWIP_VERSION_MINOR} +/** x.x.X: Revision of the stack */ +#define LWIP_VERSION_REVISION ${LWIP_VERSION_REVISION} +/** For release candidates, this is set to 1..254 + * For official releases, this is set to 255 (LWIP_RC_RELEASE) + * For development versions (Git), this is set to 0 (LWIP_RC_DEVELOPMENT) */ +#define LWIP_VERSION_RC ${LWIP_VERSION_RC} + +/** LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases */ +#define LWIP_RC_RELEASE 255 +/** LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for Git versions */ +#define LWIP_RC_DEVELOPMENT 0 + +#define LWIP_VERSION_IS_RELEASE (LWIP_VERSION_RC == LWIP_RC_RELEASE) +#define LWIP_VERSION_IS_DEVELOPMENT (LWIP_VERSION_RC == LWIP_RC_DEVELOPMENT) +#define LWIP_VERSION_IS_RC ((LWIP_VERSION_RC != LWIP_RC_RELEASE) && (LWIP_VERSION_RC != LWIP_RC_DEVELOPMENT)) + +/* Some helper defines to get a version string */ +#define LWIP_VERSTR2(x) #x +#define LWIP_VERSTR(x) LWIP_VERSTR2(x) +#if LWIP_VERSION_IS_RELEASE +#define LWIP_VERSION_STRING_SUFFIX "" +#elif LWIP_VERSION_IS_DEVELOPMENT +#define LWIP_VERSION_STRING_SUFFIX "d" +#else +#define LWIP_VERSION_STRING_SUFFIX "rc" LWIP_VERSTR(LWIP_VERSION_RC) +#endif + +/** Provides the version of the stack */ +#define LWIP_VERSION ((LWIP_VERSION_MAJOR) << 24 | (LWIP_VERSION_MINOR) << 16 | \ + (LWIP_VERSION_REVISION) << 8 | (LWIP_VERSION_RC)) +/** Provides the version of the stack as string */ +#define LWIP_VERSION_STRING LWIP_VERSTR(LWIP_VERSION_MAJOR) "." LWIP_VERSTR(LWIP_VERSION_MINOR) "." LWIP_VERSTR(LWIP_VERSION_REVISION) LWIP_VERSION_STRING_SUFFIX + +/** + * @} + */ + +/* Modules initialization */ +void lwip_init(void); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_INIT_H */ diff --git a/lib/lwip/include/lwip/ip.h b/lib/lwip/include/lwip/ip.h new file mode 100644 index 0000000000..668d83177c --- /dev/null +++ b/lib/lwip/include/lwip/ip.h @@ -0,0 +1,339 @@ +/** + * @file + * IP API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_IP_H +#define LWIP_HDR_IP_H + +#include "lwip/opt.h" + +#include "lwip/def.h" +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" +#include "lwip/err.h" +#include "lwip/netif.h" +#include "lwip/ip4.h" +#include "lwip/ip6.h" +#include "lwip/prot/ip.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* This is passed as the destination address to ip_output_if (not + to ip_output), meaning that an IP header already is constructed + in the pbuf. This is used when TCP retransmits. */ +#define LWIP_IP_HDRINCL NULL + +/** pbufs passed to IP must have a ref-count of 1 as their payload pointer + gets altered as the packet is passed down the stack */ +#ifndef LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX +#define LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p) LWIP_ASSERT("p->ref == 1", (p)->ref == 1) +#endif + +#if LWIP_NETIF_USE_HINTS +#define IP_PCB_NETIFHINT ;struct netif_hint netif_hints +#else /* LWIP_NETIF_USE_HINTS */ +#define IP_PCB_NETIFHINT +#endif /* LWIP_NETIF_USE_HINTS */ + +/** This is the common part of all PCB types. It needs to be at the + beginning of a PCB type definition. It is located here so that + changes to this common part are made in one location instead of + having to change all PCB structs. */ +#define IP_PCB \ + /* ip addresses in network byte order */ \ + ip_addr_t local_ip; \ + ip_addr_t remote_ip; \ + /* Bound netif index */ \ + u8_t netif_idx; \ + /* Socket options */ \ + u8_t so_options; \ + /* Type Of Service */ \ + u8_t tos; \ + /* Time To Live */ \ + u8_t ttl \ + /* link layer address resolution hint */ \ + IP_PCB_NETIFHINT + +struct ip_pcb { + /* Common members of all PCB types */ + IP_PCB; +}; + +#if LWIP_VLAN_PCP +#define pcb_has_tci(pcb) ((pcb)->netif_hints.tci >= 0) +#define pcb_tci_get(pcb) ((pcb)->netif_hints.tci) +#define pcb_tci_clear(pcb) do { (pcb)->netif_hints.tci = -1; } while(0) +#define pcb_tci_set(pcb, tci_val) do { (pcb)->netif_hints.tci = (tci_val) & 0xffff; } while(0) +#define pcb_tci_set_pcp_dei_vid(pcb, pcp, dei, vid) pcb_tci_set(pcb, (((pcp) & 7) << 13) | (((dei) & 1) << 12) | ((vid) & 0xFFF)) +#define pcb_tci_init(pcb) pcb_tci_clear(pcb) +#else +#define pcb_tci_init(pcb) +#endif + +/* + * Option flags per-socket. These are the same like SO_XXX in sockets.h + */ +#define SOF_REUSEADDR 0x04U /* allow local address reuse */ +#define SOF_KEEPALIVE 0x08U /* keep connections alive */ +#define SOF_BROADCAST 0x20U /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */ + +/* These flags are inherited (e.g. from a listen-pcb to a connection-pcb): */ +#define SOF_INHERITED (SOF_REUSEADDR|SOF_KEEPALIVE) + +/** Global variables of this module, kept in a struct for efficient access using base+index. */ +struct ip_globals +{ + /** The interface that accepted the packet for the current callback invocation. */ + struct netif *current_netif; + /** The interface that received the packet for the current callback invocation. */ + struct netif *current_input_netif; +#if LWIP_IPV4 + /** Header of the input packet currently being processed. */ + const struct ip_hdr *current_ip4_header; +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 + /** Header of the input IPv6 packet currently being processed. */ + struct ip6_hdr *current_ip6_header; +#endif /* LWIP_IPV6 */ + /** Total header length of current_ip4/6_header (i.e. after this, the UDP/TCP header starts) */ + u16_t current_ip_header_tot_len; + /** Source IP address of current_header */ + ip_addr_t current_iphdr_src; + /** Destination IP address of current_header */ + ip_addr_t current_iphdr_dest; +}; +extern struct ip_globals ip_data; + + +/** Get the interface that accepted the current packet. + * This may or may not be the receiving netif, depending on your netif/network setup. + * This function must only be called from a receive callback (udp_recv, + * raw_recv, tcp_accept). It will return NULL otherwise. */ +#define ip_current_netif() (ip_data.current_netif) +/** Get the interface that received the current packet. + * This function must only be called from a receive callback (udp_recv, + * raw_recv, tcp_accept). It will return NULL otherwise. */ +#define ip_current_input_netif() (ip_data.current_input_netif) +/** Total header length of ip(6)_current_header() (i.e. after this, the UDP/TCP header starts) */ +#define ip_current_header_tot_len() (ip_data.current_ip_header_tot_len) +/** Source IP address of current_header */ +#define ip_current_src_addr() (&ip_data.current_iphdr_src) +/** Destination IP address of current_header */ +#define ip_current_dest_addr() (&ip_data.current_iphdr_dest) + +#if LWIP_IPV4 && LWIP_IPV6 +/** Get the IPv4 header of the current packet. + * This function must only be called from a receive callback (udp_recv, + * raw_recv, tcp_accept). It will return NULL otherwise. */ +#define ip4_current_header() ip_data.current_ip4_header +/** Get the IPv6 header of the current packet. + * This function must only be called from a receive callback (udp_recv, + * raw_recv, tcp_accept). It will return NULL otherwise. */ +#define ip6_current_header() ((const struct ip6_hdr*)(ip_data.current_ip6_header)) +/** Returns TRUE if the current IP input packet is IPv6, FALSE if it is IPv4 */ +#define ip_current_is_v6() (ip6_current_header() != NULL) +/** Source IPv6 address of current_header */ +#define ip6_current_src_addr() (ip_2_ip6(&ip_data.current_iphdr_src)) +/** Destination IPv6 address of current_header */ +#define ip6_current_dest_addr() (ip_2_ip6(&ip_data.current_iphdr_dest)) +/** Get the transport layer protocol */ +#define ip_current_header_proto() (ip_current_is_v6() ? \ + IP6H_NEXTH(ip6_current_header()) :\ + IPH_PROTO(ip4_current_header())) +/** Get the transport layer header */ +#define ip_next_header_ptr() ((const void*)((ip_current_is_v6() ? \ + (const u8_t*)ip6_current_header() : (const u8_t*)ip4_current_header()) + ip_current_header_tot_len())) + +/** Source IP4 address of current_header */ +#define ip4_current_src_addr() (ip_2_ip4(&ip_data.current_iphdr_src)) +/** Destination IP4 address of current_header */ +#define ip4_current_dest_addr() (ip_2_ip4(&ip_data.current_iphdr_dest)) + +#elif LWIP_IPV4 /* LWIP_IPV4 && LWIP_IPV6 */ + +/** Get the IPv4 header of the current packet. + * This function must only be called from a receive callback (udp_recv, + * raw_recv, tcp_accept). It will return NULL otherwise. */ +#define ip4_current_header() ip_data.current_ip4_header +/** Always returns FALSE when only supporting IPv4 only */ +#define ip_current_is_v6() 0 +/** Get the transport layer protocol */ +#define ip_current_header_proto() IPH_PROTO(ip4_current_header()) +/** Get the transport layer header */ +#define ip_next_header_ptr() ((const void*)((const u8_t*)ip4_current_header() + ip_current_header_tot_len())) +/** Source IP4 address of current_header */ +#define ip4_current_src_addr() (&ip_data.current_iphdr_src) +/** Destination IP4 address of current_header */ +#define ip4_current_dest_addr() (&ip_data.current_iphdr_dest) + +#elif LWIP_IPV6 /* LWIP_IPV4 && LWIP_IPV6 */ + +/** Get the IPv6 header of the current packet. + * This function must only be called from a receive callback (udp_recv, + * raw_recv, tcp_accept). It will return NULL otherwise. */ +#define ip6_current_header() ((const struct ip6_hdr*)(ip_data.current_ip6_header)) +/** Always returns TRUE when only supporting IPv6 only */ +#define ip_current_is_v6() 1 +/** Get the transport layer protocol */ +#define ip_current_header_proto() IP6H_NEXTH(ip6_current_header()) +/** Get the transport layer header */ +#define ip_next_header_ptr() ((const void*)(((const u8_t*)ip6_current_header()) + ip_current_header_tot_len())) +/** Source IP6 address of current_header */ +#define ip6_current_src_addr() (&ip_data.current_iphdr_src) +/** Destination IP6 address of current_header */ +#define ip6_current_dest_addr() (&ip_data.current_iphdr_dest) + +#endif /* LWIP_IPV6 */ + +/** Union source address of current_header */ +#define ip_current_src_addr() (&ip_data.current_iphdr_src) +/** Union destination address of current_header */ +#define ip_current_dest_addr() (&ip_data.current_iphdr_dest) + +/** Gets an IP pcb option (SOF_* flags) */ +#define ip_get_option(pcb, opt) ((pcb)->so_options & (opt)) +/** Sets an IP pcb option (SOF_* flags) */ +#define ip_set_option(pcb, opt) ((pcb)->so_options = (u8_t)((pcb)->so_options | (opt))) +/** Resets an IP pcb option (SOF_* flags) */ +#define ip_reset_option(pcb, opt) ((pcb)->so_options = (u8_t)((pcb)->so_options & ~(opt))) + +#if LWIP_IPV4 && LWIP_IPV6 +/** + * @ingroup ip + * Output IP packet, netif is selected by source address + */ +#define ip_output(p, src, dest, ttl, tos, proto) \ + (IP_IS_V6(dest) ? \ + ip6_output(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto) : \ + ip4_output(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto)) +/** + * @ingroup ip + * Output IP packet to specified interface + */ +#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \ + (IP_IS_V6(dest) ? \ + ip6_output_if(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif) : \ + ip4_output_if(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif)) +/** + * @ingroup ip + * Output IP packet to interface specifying source address + */ +#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \ + (IP_IS_V6(dest) ? \ + ip6_output_if_src(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif) : \ + ip4_output_if_src(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif)) +/** Output IP packet that already includes an IP header. */ +#define ip_output_if_hdrincl(p, src, dest, netif) \ + (IP_IS_V6(dest) ? \ + ip6_output_if(p, ip_2_ip6(src), LWIP_IP_HDRINCL, 0, 0, 0, netif) : \ + ip4_output_if(p, ip_2_ip4(src), LWIP_IP_HDRINCL, 0, 0, 0, netif)) +/** Output IP packet with netif_hint */ +#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \ + (IP_IS_V6(dest) ? \ + ip6_output_hinted(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif_hint) : \ + ip4_output_hinted(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif_hint)) +/** + * @ingroup ip + * Get netif for address combination. See \ref ip6_route and \ref ip4_route + */ +#define ip_route(src, dest) \ + (IP_IS_V6(dest) ? \ + ip6_route(ip_2_ip6(src), ip_2_ip6(dest)) : \ + ip4_route_src(ip_2_ip4(src), ip_2_ip4(dest))) +/** + * @ingroup ip + * Get netif for IP. + */ +#define ip_netif_get_local_ip(netif, dest) (IP_IS_V6(dest) ? \ + ip6_netif_get_local_ip(netif, ip_2_ip6(dest)) : \ + ip4_netif_get_local_ip(netif)) +#define ip_debug_print(is_ipv6, p) ((is_ipv6) ? ip6_debug_print(p) : ip4_debug_print(p)) + +err_t ip_input(struct pbuf *p, struct netif *inp); + +#elif LWIP_IPV4 /* LWIP_IPV4 && LWIP_IPV6 */ + +#define ip_output(p, src, dest, ttl, tos, proto) \ + ip4_output(p, src, dest, ttl, tos, proto) +#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \ + ip4_output_if(p, src, dest, ttl, tos, proto, netif) +#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \ + ip4_output_if_src(p, src, dest, ttl, tos, proto, netif) +#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \ + ip4_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) +#define ip_output_if_hdrincl(p, src, dest, netif) \ + ip4_output_if(p, src, LWIP_IP_HDRINCL, 0, 0, 0, netif) +#define ip_route(src, dest) \ + ip4_route_src(src, dest) +#define ip_netif_get_local_ip(netif, dest) \ + ip4_netif_get_local_ip(netif) +#define ip_debug_print(is_ipv6, p) ip4_debug_print(p) + +#define ip_input ip4_input + +#elif LWIP_IPV6 /* LWIP_IPV4 && LWIP_IPV6 */ + +#define ip_output(p, src, dest, ttl, tos, proto) \ + ip6_output(p, src, dest, ttl, tos, proto) +#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \ + ip6_output_if(p, src, dest, ttl, tos, proto, netif) +#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \ + ip6_output_if_src(p, src, dest, ttl, tos, proto, netif) +#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \ + ip6_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) +#define ip_output_if_hdrincl(p, src, dest, netif) \ + ip6_output_if(p, src, LWIP_IP_HDRINCL, 0, 0, 0, netif) +#define ip_route(src, dest) \ + ip6_route(src, dest) +#define ip_netif_get_local_ip(netif, dest) \ + ip6_netif_get_local_ip(netif, dest) +#define ip_debug_print(is_ipv6, p) ip6_debug_print(p) + +#define ip_input ip6_input + +#endif /* LWIP_IPV6 */ + +#define ip_route_get_local_ip(src, dest, netif, ipaddr) do { \ + (netif) = ip_route(src, dest); \ + (ipaddr) = ip_netif_get_local_ip(netif, dest); \ +}while(0) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_IP_H */ diff --git a/lib/lwip/include/lwip/ip4.h b/lib/lwip/include/lwip/ip4.h new file mode 100644 index 0000000000..4d7228d06d --- /dev/null +++ b/lib/lwip/include/lwip/ip4.h @@ -0,0 +1,109 @@ +/** + * @file + * IPv4 API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_IP4_H +#define LWIP_HDR_IP4_H + +#include "lwip/opt.h" + +#if LWIP_IPV4 + +#include "lwip/def.h" +#include "lwip/pbuf.h" +#include "lwip/ip4_addr.h" +#include "lwip/err.h" +#include "lwip/netif.h" +#include "lwip/prot/ip4.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef LWIP_HOOK_IP4_ROUTE_SRC +#define LWIP_IPV4_SRC_ROUTING 1 +#else +#define LWIP_IPV4_SRC_ROUTING 0 +#endif + +/** Currently, the function ip_output_if_opt() is only used with IGMP */ +#define IP_OPTIONS_SEND (LWIP_IPV4 && LWIP_IGMP) + +#define ip_init() /* Compatibility define, no init needed. */ +struct netif *ip4_route(const ip4_addr_t *dest); +#if LWIP_IPV4_SRC_ROUTING +struct netif *ip4_route_src(const ip4_addr_t *src, const ip4_addr_t *dest); +#else /* LWIP_IPV4_SRC_ROUTING */ +#define ip4_route_src(src, dest) ip4_route(dest) +#endif /* LWIP_IPV4_SRC_ROUTING */ +err_t ip4_input(struct pbuf *p, struct netif *inp); +err_t ip4_output(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto); +err_t ip4_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto, struct netif *netif); +err_t ip4_output_if_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto, struct netif *netif); +#if LWIP_NETIF_USE_HINTS +err_t ip4_output_hinted(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto, struct netif_hint *netif_hint); +#endif /* LWIP_NETIF_USE_HINTS */ +#if IP_OPTIONS_SEND +err_t ip4_output_if_opt(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options, + u16_t optlen); +err_t ip4_output_if_opt_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, + u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options, + u16_t optlen); +#endif /* IP_OPTIONS_SEND */ + +#if LWIP_MULTICAST_TX_OPTIONS +void ip4_set_default_multicast_netif(struct netif* default_multicast_netif); +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + +#define ip4_netif_get_local_ip(netif) (((netif) != NULL) ? netif_ip_addr4(netif) : NULL) + +#if IP_DEBUG +void ip4_debug_print(struct pbuf *p); +#else +#define ip4_debug_print(p) +#endif /* IP_DEBUG */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV4 */ + +#endif /* LWIP_HDR_IP_H */ diff --git a/lib/lwip/include/lwip/ip4_addr.h b/lib/lwip/include/lwip/ip4_addr.h new file mode 100644 index 0000000000..9fd8a0a183 --- /dev/null +++ b/lib/lwip/include/lwip/ip4_addr.h @@ -0,0 +1,225 @@ +/** + * @file + * IPv4 address API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_IP4_ADDR_H +#define LWIP_HDR_IP4_ADDR_H + +#include "lwip/opt.h" +#include "lwip/def.h" + +#if LWIP_IPV4 + +#ifdef __cplusplus +extern "C" { +#endif + +/** This is the aligned version of ip4_addr_t, + used as local variable, on the stack, etc. */ +struct ip4_addr { + u32_t addr; +}; + +/** ip4_addr_t uses a struct for convenience only, so that the same defines can + * operate both on ip4_addr_t as well as on ip4_addr_p_t. */ +typedef struct ip4_addr ip4_addr_t; + +/* Forward declaration to not include netif.h */ +struct netif; + +/** 255.255.255.255 */ +#define IPADDR_NONE ((u32_t)0xffffffffUL) +/** 127.0.0.1 */ +#define IPADDR_LOOPBACK ((u32_t)0x7f000001UL) +/** 0.0.0.0 */ +#define IPADDR_ANY ((u32_t)0x00000000UL) +/** 255.255.255.255 */ +#define IPADDR_BROADCAST ((u32_t)0xffffffffUL) + +/* Definitions of the bits in an Internet address integer. + + On subnets, host and network parts are found according to + the subnet mask, not these masks. */ +#define IP_CLASSA(a) ((((u32_t)(a)) & 0x80000000UL) == 0) +#define IP_CLASSA_NET 0xff000000 +#define IP_CLASSA_NSHIFT 24 +#define IP_CLASSA_HOST (0xffffffff & ~IP_CLASSA_NET) +#define IP_CLASSA_MAX 128 + +#define IP_CLASSB(a) ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL) +#define IP_CLASSB_NET 0xffff0000 +#define IP_CLASSB_NSHIFT 16 +#define IP_CLASSB_HOST (0xffffffff & ~IP_CLASSB_NET) +#define IP_CLASSB_MAX 65536 + +#define IP_CLASSC(a) ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL) +#define IP_CLASSC_NET 0xffffff00 +#define IP_CLASSC_NSHIFT 8 +#define IP_CLASSC_HOST (0xffffffff & ~IP_CLASSC_NET) + +#define IP_CLASSD(a) (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL) +#define IP_CLASSD_NET 0xf0000000 /* These ones aren't really */ +#define IP_CLASSD_NSHIFT 28 /* net and host fields, but */ +#define IP_CLASSD_HOST 0x0fffffff /* routing needn't know. */ +#define IP_MULTICAST(a) IP_CLASSD(a) + +#define IP_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) +#define IP_BADCLASS(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) + +#define IP_LOOPBACKNET 127 /* official! */ + +/** Set an IP address given by the four byte-parts */ +#define IP4_ADDR(ipaddr, a,b,c,d) (ipaddr)->addr = PP_HTONL(LWIP_MAKEU32(a,b,c,d)) + +/** Copy IP address - faster than ip4_addr_set: no NULL check */ +#define ip4_addr_copy(dest, src) ((dest).addr = (src).addr) +/** Safely copy one IP address to another (src may be NULL) */ +#define ip4_addr_set(dest, src) ((dest)->addr = \ + ((src) == NULL ? 0 : \ + (src)->addr)) +/** Set complete address to zero */ +#define ip4_addr_set_zero(ipaddr) ((ipaddr)->addr = 0) +/** Set address to IPADDR_ANY (no need for lwip_htonl()) */ +#define ip4_addr_set_any(ipaddr) ((ipaddr)->addr = IPADDR_ANY) +/** Set address to loopback address */ +#define ip4_addr_set_loopback(ipaddr) ((ipaddr)->addr = PP_HTONL(IPADDR_LOOPBACK)) +/** Check if an address is in the loopback region */ +#define ip4_addr_isloopback(ipaddr) (((ipaddr)->addr & PP_HTONL(IP_CLASSA_NET)) == PP_HTONL(((u32_t)IP_LOOPBACKNET) << 24)) +/** Safely copy one IP address to another and change byte order + * from host- to network-order. */ +#define ip4_addr_set_hton(dest, src) ((dest)->addr = \ + ((src) == NULL ? 0:\ + lwip_htonl((src)->addr))) +/** IPv4 only: set the IP address given as an u32_t */ +#define ip4_addr_set_u32(dest_ipaddr, src_u32) ((dest_ipaddr)->addr = (src_u32)) +/** IPv4 only: get the IP address as an u32_t */ +#define ip4_addr_get_u32(src_ipaddr) ((src_ipaddr)->addr) + +/** Get the network address by combining host address with netmask */ +#define ip4_addr_get_network(target, host, netmask) do { ((target)->addr = ((host)->addr) & ((netmask)->addr)); } while(0) + +/** + * Determine if two address are on the same network. + * @deprecated Renamed to @ref ip4_addr_net_eq + */ +#define ip4_addr_netcmp(addr1, addr2, mask) ip4_addr_net_eq(addr1, addr2, mask) +/** + * Determine if two address are on the same network. + * + * @arg addr1 IP address 1 + * @arg addr2 IP address 2 + * @arg mask network identifier mask + * @return !0 if the network identifiers of both address match + */ +#define ip4_addr_net_eq(addr1, addr2, mask) (((addr1)->addr & \ + (mask)->addr) == \ + ((addr2)->addr & \ + (mask)->addr)) +/** + * @deprecated Renamed to ip4_addr_eq + */ +#define ip4_addr_cmp(addr1, addr2) ip4_addr_eq(addr1, addr2) +#define ip4_addr_eq(addr1, addr2) ((addr1)->addr == (addr2)->addr) + +#define ip4_addr_isany_val(addr1) ((addr1).addr == IPADDR_ANY) +#define ip4_addr_isany(addr1) ((addr1) == NULL || ip4_addr_isany_val(*(addr1))) + +#define ip4_addr_isbroadcast(addr1, netif) ip4_addr_isbroadcast_u32((addr1)->addr, netif) +u8_t ip4_addr_isbroadcast_u32(u32_t addr, const struct netif *netif); + +#define ip_addr_netmask_valid(netmask) ip4_addr_netmask_valid((netmask)->addr) +u8_t ip4_addr_netmask_valid(u32_t netmask); + +#define ip4_addr_ismulticast(addr1) (((addr1)->addr & PP_HTONL(0xf0000000UL)) == PP_HTONL(0xe0000000UL)) + +#define ip4_addr_islinklocal(addr1) (((addr1)->addr & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xa9fe0000UL)) + +#define ip4_addr_debug_print_parts(debug, a, b, c, d) \ + LWIP_DEBUGF(debug, ("%" U16_F ".%" U16_F ".%" U16_F ".%" U16_F, a, b, c, d)) +#define ip4_addr_debug_print(debug, ipaddr) \ + ip4_addr_debug_print_parts(debug, \ + (u16_t)((ipaddr) != NULL ? ip4_addr1_16(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? ip4_addr2_16(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? ip4_addr3_16(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? ip4_addr4_16(ipaddr) : 0)) +#define ip4_addr_debug_print_val(debug, ipaddr) \ + ip4_addr_debug_print_parts(debug, \ + ip4_addr1_16_val(ipaddr), \ + ip4_addr2_16_val(ipaddr), \ + ip4_addr3_16_val(ipaddr), \ + ip4_addr4_16_val(ipaddr)) + +/* Get one byte from the 4-byte address */ +#define ip4_addr_get_byte(ipaddr, idx) (((const u8_t*)(&(ipaddr)->addr))[idx]) +#define ip4_addr1(ipaddr) ip4_addr_get_byte(ipaddr, 0) +#define ip4_addr2(ipaddr) ip4_addr_get_byte(ipaddr, 1) +#define ip4_addr3(ipaddr) ip4_addr_get_byte(ipaddr, 2) +#define ip4_addr4(ipaddr) ip4_addr_get_byte(ipaddr, 3) +/* Get one byte from the 4-byte address, but argument is 'ip4_addr_t', + * not a pointer */ +#define ip4_addr_get_byte_val(ipaddr, idx) ((u8_t)(((ipaddr).addr >> (idx * 8)) & 0xff)) +#define ip4_addr1_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 0) +#define ip4_addr2_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 1) +#define ip4_addr3_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 2) +#define ip4_addr4_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 3) +/* These are cast to u16_t, with the intent that they are often arguments + * to printf using the U16_F format from cc.h. */ +#define ip4_addr1_16(ipaddr) ((u16_t)ip4_addr1(ipaddr)) +#define ip4_addr2_16(ipaddr) ((u16_t)ip4_addr2(ipaddr)) +#define ip4_addr3_16(ipaddr) ((u16_t)ip4_addr3(ipaddr)) +#define ip4_addr4_16(ipaddr) ((u16_t)ip4_addr4(ipaddr)) +#define ip4_addr1_16_val(ipaddr) ((u16_t)ip4_addr1_val(ipaddr)) +#define ip4_addr2_16_val(ipaddr) ((u16_t)ip4_addr2_val(ipaddr)) +#define ip4_addr3_16_val(ipaddr) ((u16_t)ip4_addr3_val(ipaddr)) +#define ip4_addr4_16_val(ipaddr) ((u16_t)ip4_addr4_val(ipaddr)) + +#define IP4ADDR_STRLEN_MAX 16 + +/** For backwards compatibility */ +#define ip_ntoa(ipaddr) ipaddr_ntoa(ipaddr) + +u32_t ipaddr_addr(const char *cp); +int ip4addr_aton(const char *cp, ip4_addr_t *addr); +/** returns ptr to static buffer; not reentrant! */ +char *ip4addr_ntoa(const ip4_addr_t *addr); +char *ip4addr_ntoa_r(const ip4_addr_t *addr, char *buf, int buflen); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV4 */ + +#endif /* LWIP_HDR_IP_ADDR_H */ diff --git a/lib/lwip/include/lwip/ip4_frag.h b/lib/lwip/include/lwip/ip4_frag.h new file mode 100644 index 0000000000..ed5bf14a31 --- /dev/null +++ b/lib/lwip/include/lwip/ip4_frag.h @@ -0,0 +1,100 @@ +/** + * @file + * IP fragmentation/reassembly + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Jani Monoses jani@iv.ro + * + */ + +#ifndef LWIP_HDR_IP4_FRAG_H +#define LWIP_HDR_IP4_FRAG_H + +#include "lwip/opt.h" +#include "lwip/err.h" +#include "lwip/pbuf.h" +#include "lwip/netif.h" +#include "lwip/ip_addr.h" +#include "lwip/ip.h" + +#if LWIP_IPV4 + +#ifdef __cplusplus +extern "C" { +#endif + +#if IP_REASSEMBLY +/* The IP reassembly timer interval in milliseconds. */ +#define IP_TMR_INTERVAL 1000 + +/** IP reassembly helper struct. + * This is exported because memp needs to know the size. + */ +struct ip_reassdata { + struct ip_reassdata *next; + struct pbuf *p; + struct ip_hdr iphdr; + u16_t datagram_len; + u8_t flags; + u8_t timer; +}; + +void ip_reass_init(void); +void ip_reass_tmr(void); +struct pbuf * ip4_reass(struct pbuf *p); +#endif /* IP_REASSEMBLY */ + +#if IP_FRAG +#if !LWIP_NETIF_TX_SINGLE_PBUF +#ifndef LWIP_PBUF_CUSTOM_REF_DEFINED +#define LWIP_PBUF_CUSTOM_REF_DEFINED +/** A custom pbuf that holds a reference to another pbuf, which is freed + * when this custom pbuf is freed. This is used to create a custom PBUF_REF + * that points into the original pbuf. */ +struct pbuf_custom_ref { + /** 'base class' */ + struct pbuf_custom pc; + /** pointer to the original pbuf that is referenced */ + struct pbuf *original; +}; +#endif /* LWIP_PBUF_CUSTOM_REF_DEFINED */ +#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */ + +err_t ip4_frag(struct pbuf *p, struct netif *netif, const ip4_addr_t *dest); +#endif /* IP_FRAG */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV4 */ + +#endif /* LWIP_HDR_IP4_FRAG_H */ diff --git a/lib/lwip/include/lwip/ip6.h b/lib/lwip/include/lwip/ip6.h new file mode 100644 index 0000000000..f894e063ef --- /dev/null +++ b/lib/lwip/include/lwip/ip6.h @@ -0,0 +1,93 @@ +/** + * @file + * + * IPv6 layer. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ +#ifndef LWIP_HDR_IP6_H +#define LWIP_HDR_IP6_H + +#include "lwip/opt.h" + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/ip6_addr.h" +#include "lwip/prot/ip6.h" +#include "lwip/def.h" +#include "lwip/pbuf.h" +#include "lwip/netif.h" + +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct netif *ip6_route(const ip6_addr_t *src, const ip6_addr_t *dest); +const ip_addr_t *ip6_select_source_address(struct netif *netif, const ip6_addr_t * dest); +err_t ip6_input(struct pbuf *p, struct netif *inp); +err_t ip6_output(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest, + u8_t hl, u8_t tc, u8_t nexth); +err_t ip6_output_if(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest, + u8_t hl, u8_t tc, u8_t nexth, struct netif *netif); +err_t ip6_output_if_src(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest, + u8_t hl, u8_t tc, u8_t nexth, struct netif *netif); +#if LWIP_NETIF_USE_HINTS +err_t ip6_output_hinted(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest, + u8_t hl, u8_t tc, u8_t nexth, struct netif_hint *netif_hint); +#endif /* LWIP_NETIF_USE_HINTS */ +#if LWIP_IPV6_MLD +err_t ip6_options_add_hbh_ra(struct pbuf * p, u8_t nexth, u8_t value); +#endif /* LWIP_IPV6_MLD */ + +#define ip6_netif_get_local_ip(netif, dest) (((netif) != NULL) ? \ + ip6_select_source_address(netif, dest) : NULL) + +#if IP6_DEBUG +void ip6_debug_print(struct pbuf *p); +#else +#define ip6_debug_print(p) +#endif /* IP6_DEBUG */ + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 */ + +#endif /* LWIP_HDR_IP6_H */ diff --git a/lib/lwip/include/lwip/ip6_addr.h b/lib/lwip/include/lwip/ip6_addr.h new file mode 100644 index 0000000000..5937fed9f0 --- /dev/null +++ b/lib/lwip/include/lwip/ip6_addr.h @@ -0,0 +1,372 @@ +/** + * @file + * + * IPv6 addresses. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * Structs and macros for handling IPv6 addresses. + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ +#ifndef LWIP_HDR_IP6_ADDR_H +#define LWIP_HDR_IP6_ADDR_H + +#include "lwip/opt.h" +#include "def.h" + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/ip6_zone.h" + +#ifdef __cplusplus +extern "C" { +#endif + + +/** This is the aligned version of ip6_addr_t, + used as local variable, on the stack, etc. */ +struct ip6_addr { + u32_t addr[4]; +#if LWIP_IPV6_SCOPES + u8_t zone; +#endif /* LWIP_IPV6_SCOPES */ +}; + +/** IPv6 address */ +typedef struct ip6_addr ip6_addr_t; + +/** Set an IPv6 partial address given by byte-parts */ +#define IP6_ADDR_PART(ip6addr, index, a,b,c,d) \ + (ip6addr)->addr[index] = PP_HTONL(LWIP_MAKEU32(a,b,c,d)) + +/** Set a full IPv6 address by passing the 4 u32_t indices in network byte order + (use PP_HTONL() for constants) */ +#define IP6_ADDR(ip6addr, idx0, idx1, idx2, idx3) do { \ + (ip6addr)->addr[0] = idx0; \ + (ip6addr)->addr[1] = idx1; \ + (ip6addr)->addr[2] = idx2; \ + (ip6addr)->addr[3] = idx3; \ + ip6_addr_clear_zone(ip6addr); } while(0) + +/** Access address in 16-bit block */ +#define IP6_ADDR_BLOCK1(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[0]) >> 16) & 0xffff)) +/** Access address in 16-bit block */ +#define IP6_ADDR_BLOCK2(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[0])) & 0xffff)) +/** Access address in 16-bit block */ +#define IP6_ADDR_BLOCK3(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[1]) >> 16) & 0xffff)) +/** Access address in 16-bit block */ +#define IP6_ADDR_BLOCK4(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[1])) & 0xffff)) +/** Access address in 16-bit block */ +#define IP6_ADDR_BLOCK5(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[2]) >> 16) & 0xffff)) +/** Access address in 16-bit block */ +#define IP6_ADDR_BLOCK6(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[2])) & 0xffff)) +/** Access address in 16-bit block */ +#define IP6_ADDR_BLOCK7(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[3]) >> 16) & 0xffff)) +/** Access address in 16-bit block */ +#define IP6_ADDR_BLOCK8(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[3])) & 0xffff)) + +/** Copy IPv6 address - faster than ip6_addr_set: no NULL check */ +#define ip6_addr_copy(dest, src) do{(dest).addr[0] = (src).addr[0]; \ + (dest).addr[1] = (src).addr[1]; \ + (dest).addr[2] = (src).addr[2]; \ + (dest).addr[3] = (src).addr[3]; \ + ip6_addr_copy_zone((dest), (src)); }while(0) +/** Safely copy one IPv6 address to another (src may be NULL) */ +#define ip6_addr_set(dest, src) do{(dest)->addr[0] = (src) == NULL ? 0 : (src)->addr[0]; \ + (dest)->addr[1] = (src) == NULL ? 0 : (src)->addr[1]; \ + (dest)->addr[2] = (src) == NULL ? 0 : (src)->addr[2]; \ + (dest)->addr[3] = (src) == NULL ? 0 : (src)->addr[3]; \ + ip6_addr_set_zone((dest), (src) == NULL ? IP6_NO_ZONE : ip6_addr_zone(src)); }while(0) + +/** Copy packed IPv6 address to unpacked IPv6 address; zone is not set */ +#define ip6_addr_copy_from_packed(dest, src) do{(dest).addr[0] = (src).addr[0]; \ + (dest).addr[1] = (src).addr[1]; \ + (dest).addr[2] = (src).addr[2]; \ + (dest).addr[3] = (src).addr[3]; \ + ip6_addr_clear_zone(&dest); }while(0) + +/** Copy unpacked IPv6 address to packed IPv6 address; zone is lost */ +#define ip6_addr_copy_to_packed(dest, src) do{(dest).addr[0] = (src).addr[0]; \ + (dest).addr[1] = (src).addr[1]; \ + (dest).addr[2] = (src).addr[2]; \ + (dest).addr[3] = (src).addr[3]; }while(0) + +/** Set complete address to zero */ +#define ip6_addr_set_zero(ip6addr) do{(ip6addr)->addr[0] = 0; \ + (ip6addr)->addr[1] = 0; \ + (ip6addr)->addr[2] = 0; \ + (ip6addr)->addr[3] = 0; \ + ip6_addr_clear_zone(ip6addr);}while(0) + +/** Set address to ipv6 'any' (no need for lwip_htonl()) */ +#define ip6_addr_set_any(ip6addr) ip6_addr_set_zero(ip6addr) +/** Set address to ipv6 loopback address */ +#define ip6_addr_set_loopback(ip6addr) do{(ip6addr)->addr[0] = 0; \ + (ip6addr)->addr[1] = 0; \ + (ip6addr)->addr[2] = 0; \ + (ip6addr)->addr[3] = PP_HTONL(0x00000001UL); \ + ip6_addr_clear_zone(ip6addr);}while(0) +/** Safely copy one IPv6 address to another and change byte order + * from host- to network-order. */ +#define ip6_addr_set_hton(dest, src) do{(dest)->addr[0] = (src) == NULL ? 0 : lwip_htonl((src)->addr[0]); \ + (dest)->addr[1] = (src) == NULL ? 0 : lwip_htonl((src)->addr[1]); \ + (dest)->addr[2] = (src) == NULL ? 0 : lwip_htonl((src)->addr[2]); \ + (dest)->addr[3] = (src) == NULL ? 0 : lwip_htonl((src)->addr[3]); \ + ip6_addr_set_zone((dest), (src) == NULL ? IP6_NO_ZONE : ip6_addr_zone(src));}while(0) + + +/** @deprecated Renamed to @ref ip6_addr_net_zoneless_eq */ +#define ip6_addr_netcmp_zoneless(addr1, addr2) ip6_addr_net_zoneless_eq(addr1, addr2) +/** Compare IPv6 networks, ignoring zone information. To be used sparingly! */ +#define ip6_addr_net_zoneless_eq(addr1, addr2) (((addr1)->addr[0] == (addr2)->addr[0]) && \ + ((addr1)->addr[1] == (addr2)->addr[1])) + +/** + * Determine if two IPv6 address are on the same network. + * @deprecated Renamed to @ref ip6_addr_net_eq + */ +#define ip6_addr_netcmp(addr1, addr2) ip6_addr_net_eq(addr1, addr2) +/** + * Determine if two IPv6 address are on the same network. + * + * @param addr1 IPv6 address 1 + * @param addr2 IPv6 address 2 + * @return 1 if the network identifiers of both address match, 0 if not + */ +#define ip6_addr_net_eq(addr1, addr2) (ip6_addr_net_zoneless_eq((addr1), (addr2)) && \ + ip6_addr_zone_eq((addr1), (addr2))) + +#define ip6_addr_nethostcmp(addr1, addr2) ip6_addr_nethost_eq(addr1, addr2) +/* Exact-host comparison *after* ip6_addr_net_eq() succeeded, for efficiency. */ +#define ip6_addr_nethost_eq(addr1, addr2) (((addr1)->addr[2] == (addr2)->addr[2]) && \ + ((addr1)->addr[3] == (addr2)->addr[3])) + +/** @deprecated Renamed to @ref ip6_addr_zoneless_eq */ +#define ip6_addr_cmp_zoneless(addr1, addr2) ip6_addr_zoneless_eq(addr1, addr2) +/** Compare IPv6 addresses, ignoring zone information. To be used sparingly! */ +#define ip6_addr_zoneless_eq(addr1, addr2) (((addr1)->addr[0] == (addr2)->addr[0]) && \ + ((addr1)->addr[1] == (addr2)->addr[1]) && \ + ((addr1)->addr[2] == (addr2)->addr[2]) && \ + ((addr1)->addr[3] == (addr2)->addr[3])) +/** @deprecated Renamed to @ref ip6_addr_eq */ +#define ip6_addr_cmp(addr1, addr2) ip6_addr_eq(addr1, addr2) +/** + * Determine if two IPv6 addresses are the same. In particular, the address + * part of both must be the same, and the zone must be compatible. + * + * @param addr1 IPv6 address 1 + * @param addr2 IPv6 address 2 + * @return 1 if the addresses are considered equal, 0 if not + */ +#define ip6_addr_eq(addr1, addr2) (ip6_addr_zoneless_eq((addr1), (addr2)) && \ + ip6_addr_zone_eq((addr1), (addr2))) + +/** @deprecated Renamed to @ref ip6_addr_packed_eq */ +#define ip6_addr_cmp_packed(ip6addr, paddr, zone_idx) ip6_addr_packed_eq(ip6addr, paddr, zone_idx) +/** Compare IPv6 address to packed address and zone */ +#define ip6_addr_packed_eq(ip6addr, paddr, zone_idx) (((ip6addr)->addr[0] == (paddr)->addr[0]) && \ + ((ip6addr)->addr[1] == (paddr)->addr[1]) && \ + ((ip6addr)->addr[2] == (paddr)->addr[2]) && \ + ((ip6addr)->addr[3] == (paddr)->addr[3]) && \ + ip6_addr_equals_zone((ip6addr), (zone_idx))) + +#define ip6_get_subnet_id(ip6addr) (lwip_htonl((ip6addr)->addr[2]) & 0x0000ffffUL) + +#define ip6_addr_isany_val(ip6addr) (((ip6addr).addr[0] == 0) && \ + ((ip6addr).addr[1] == 0) && \ + ((ip6addr).addr[2] == 0) && \ + ((ip6addr).addr[3] == 0)) +#define ip6_addr_isany(ip6addr) (((ip6addr) == NULL) || ip6_addr_isany_val(*(ip6addr))) + +#define ip6_addr_isloopback(ip6addr) (((ip6addr)->addr[0] == 0UL) && \ + ((ip6addr)->addr[1] == 0UL) && \ + ((ip6addr)->addr[2] == 0UL) && \ + ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL))) + +#define ip6_addr_isglobal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xe0000000UL)) == PP_HTONL(0x20000000UL)) + +#define ip6_addr_islinklocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfe800000UL)) + +#define ip6_addr_issitelocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfec00000UL)) + +#define ip6_addr_isuniquelocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xfe000000UL)) == PP_HTONL(0xfc000000UL)) + +#define ip6_addr_isipv4mappedipv6(ip6addr) (((ip6addr)->addr[0] == 0) && ((ip6addr)->addr[1] == 0) && (((ip6addr)->addr[2]) == PP_HTONL(0x0000FFFFUL))) + +#define ip6_addr_isipv4compat(ip6addr) (((ip6addr)->addr[0] == 0UL) && \ + ((ip6addr)->addr[1] == 0UL) && \ + ((ip6addr)->addr[2] == 0UL) && \ + (htonl((ip6addr)->addr[3]) > 1)) + +#define ip6_addr_ismulticast(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xff000000UL)) +#define ip6_addr_multicast_transient_flag(ip6addr) ((ip6addr)->addr[0] & PP_HTONL(0x00100000UL)) +#define ip6_addr_multicast_prefix_flag(ip6addr) ((ip6addr)->addr[0] & PP_HTONL(0x00200000UL)) +#define ip6_addr_multicast_rendezvous_flag(ip6addr) ((ip6addr)->addr[0] & PP_HTONL(0x00400000UL)) +#define ip6_addr_multicast_scope(ip6addr) ((lwip_htonl((ip6addr)->addr[0]) >> 16) & 0xf) +#define IP6_MULTICAST_SCOPE_RESERVED 0x0 +#define IP6_MULTICAST_SCOPE_RESERVED0 0x0 +#define IP6_MULTICAST_SCOPE_INTERFACE_LOCAL 0x1 +#define IP6_MULTICAST_SCOPE_LINK_LOCAL 0x2 +#define IP6_MULTICAST_SCOPE_RESERVED3 0x3 +#define IP6_MULTICAST_SCOPE_ADMIN_LOCAL 0x4 +#define IP6_MULTICAST_SCOPE_SITE_LOCAL 0x5 +#define IP6_MULTICAST_SCOPE_ORGANIZATION_LOCAL 0x8 +#define IP6_MULTICAST_SCOPE_GLOBAL 0xe +#define IP6_MULTICAST_SCOPE_RESERVEDF 0xf +#define ip6_addr_ismulticast_iflocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff010000UL)) +#define ip6_addr_ismulticast_linklocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff020000UL)) +#define ip6_addr_ismulticast_adminlocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff040000UL)) +#define ip6_addr_ismulticast_sitelocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff050000UL)) +#define ip6_addr_ismulticast_orglocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff080000UL)) +#define ip6_addr_ismulticast_global(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff0e0000UL)) + +/* Scoping note: while interface-local and link-local multicast addresses do + * have a scope (i.e., they are meaningful only in the context of a particular + * interface), the following functions are not assigning or comparing zone + * indices. The reason for this is backward compatibility. Any call site that + * produces a non-global multicast address must assign a multicast address as + * appropriate itself. */ + +#define ip6_addr_isallnodes_iflocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff010000UL)) && \ + ((ip6addr)->addr[1] == 0UL) && \ + ((ip6addr)->addr[2] == 0UL) && \ + ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL))) + +#define ip6_addr_isallnodes_linklocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \ + ((ip6addr)->addr[1] == 0UL) && \ + ((ip6addr)->addr[2] == 0UL) && \ + ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL))) +#define ip6_addr_set_allnodes_linklocal(ip6addr) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \ + (ip6addr)->addr[1] = 0; \ + (ip6addr)->addr[2] = 0; \ + (ip6addr)->addr[3] = PP_HTONL(0x00000001UL); \ + ip6_addr_clear_zone(ip6addr); }while(0) + +#define ip6_addr_isallrouters_linklocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \ + ((ip6addr)->addr[1] == 0UL) && \ + ((ip6addr)->addr[2] == 0UL) && \ + ((ip6addr)->addr[3] == PP_HTONL(0x00000002UL))) +#define ip6_addr_set_allrouters_linklocal(ip6addr) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \ + (ip6addr)->addr[1] = 0; \ + (ip6addr)->addr[2] = 0; \ + (ip6addr)->addr[3] = PP_HTONL(0x00000002UL); \ + ip6_addr_clear_zone(ip6addr); }while(0) + +#define ip6_addr_issolicitednode(ip6addr) ( ((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \ + ((ip6addr)->addr[2] == PP_HTONL(0x00000001UL)) && \ + (((ip6addr)->addr[3] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xff000000UL)) ) + +#define ip6_addr_set_solicitednode(ip6addr, if_id) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \ + (ip6addr)->addr[1] = 0; \ + (ip6addr)->addr[2] = PP_HTONL(0x00000001UL); \ + (ip6addr)->addr[3] = (PP_HTONL(0xff000000UL) | (if_id)); \ + ip6_addr_clear_zone(ip6addr); }while(0) + +#define ip6_addr_cmp_solicitednode(ip6addr, sn_addr) ip6_addr_solicitednode_eq(ip6addr, sn_addr) +#define ip6_addr_solicitednode_eq(ip6addr, sn_addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \ + ((ip6addr)->addr[1] == 0) && \ + ((ip6addr)->addr[2] == PP_HTONL(0x00000001UL)) && \ + ((ip6addr)->addr[3] == (PP_HTONL(0xff000000UL) | (sn_addr)->addr[3]))) + +/* IPv6 address states. */ +#define IP6_ADDR_INVALID 0x00 +#define IP6_ADDR_TENTATIVE 0x08 +#define IP6_ADDR_TENTATIVE_1 0x09 /* 1 probe sent */ +#define IP6_ADDR_TENTATIVE_2 0x0a /* 2 probes sent */ +#define IP6_ADDR_TENTATIVE_3 0x0b /* 3 probes sent */ +#define IP6_ADDR_TENTATIVE_4 0x0c /* 4 probes sent */ +#define IP6_ADDR_TENTATIVE_5 0x0d /* 5 probes sent */ +#define IP6_ADDR_TENTATIVE_6 0x0e /* 6 probes sent */ +#define IP6_ADDR_TENTATIVE_7 0x0f /* 7 probes sent */ +#define IP6_ADDR_VALID 0x10 /* This bit marks an address as valid (preferred or deprecated) */ +#define IP6_ADDR_PREFERRED 0x30 +#define IP6_ADDR_DEPRECATED 0x10 /* Same as VALID (valid but not preferred) */ +#define IP6_ADDR_DUPLICATED 0x40 /* Failed DAD test, not valid */ + +#define IP6_ADDR_TENTATIVE_COUNT_MASK 0x07 /* 1-7 probes sent */ + +#define ip6_addr_isinvalid(addr_state) (addr_state == IP6_ADDR_INVALID) +#define ip6_addr_istentative(addr_state) (addr_state & IP6_ADDR_TENTATIVE) +#define ip6_addr_isvalid(addr_state) (addr_state & IP6_ADDR_VALID) /* Include valid, preferred, and deprecated. */ +#define ip6_addr_ispreferred(addr_state) (addr_state == IP6_ADDR_PREFERRED) +#define ip6_addr_isdeprecated(addr_state) (addr_state == IP6_ADDR_DEPRECATED) +#define ip6_addr_isduplicated(addr_state) (addr_state == IP6_ADDR_DUPLICATED) + +#if LWIP_IPV6_ADDRESS_LIFETIMES +#define IP6_ADDR_LIFE_STATIC (0) +#define IP6_ADDR_LIFE_INFINITE (0xffffffffUL) +#define ip6_addr_life_isstatic(addr_life) ((addr_life) == IP6_ADDR_LIFE_STATIC) +#define ip6_addr_life_isinfinite(addr_life) ((addr_life) == IP6_ADDR_LIFE_INFINITE) +#endif /* LWIP_IPV6_ADDRESS_LIFETIMES */ + +#define ip6_addr_debug_print_parts(debug, a, b, c, d, e, f, g, h) \ + LWIP_DEBUGF(debug, ("%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F, \ + a, b, c, d, e, f, g, h)) +#define ip6_addr_debug_print(debug, ipaddr) \ + ip6_addr_debug_print_parts(debug, \ + (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK1(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK2(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK3(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK4(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK5(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK6(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK7(ipaddr) : 0), \ + (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK8(ipaddr) : 0)) +#define ip6_addr_debug_print_val(debug, ipaddr) \ + ip6_addr_debug_print_parts(debug, \ + IP6_ADDR_BLOCK1(&(ipaddr)), \ + IP6_ADDR_BLOCK2(&(ipaddr)), \ + IP6_ADDR_BLOCK3(&(ipaddr)), \ + IP6_ADDR_BLOCK4(&(ipaddr)), \ + IP6_ADDR_BLOCK5(&(ipaddr)), \ + IP6_ADDR_BLOCK6(&(ipaddr)), \ + IP6_ADDR_BLOCK7(&(ipaddr)), \ + IP6_ADDR_BLOCK8(&(ipaddr))) + +#define IP6ADDR_STRLEN_MAX 46 + +int ip6addr_aton(const char *cp, ip6_addr_t *addr); +/** returns ptr to static buffer; not reentrant! */ +char *ip6addr_ntoa(const ip6_addr_t *addr); +char *ip6addr_ntoa_r(const ip6_addr_t *addr, char *buf, int buflen); + + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 */ + +#endif /* LWIP_HDR_IP6_ADDR_H */ diff --git a/lib/lwip/include/lwip/ip6_frag.h b/lib/lwip/include/lwip/ip6_frag.h new file mode 100644 index 0000000000..87e0e86a67 --- /dev/null +++ b/lib/lwip/include/lwip/ip6_frag.h @@ -0,0 +1,144 @@ +/** + * @file + * + * IPv6 fragmentation and reassembly. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ +#ifndef LWIP_HDR_IP6_FRAG_H +#define LWIP_HDR_IP6_FRAG_H + +#include "lwip/opt.h" +#include "lwip/pbuf.h" +#include "lwip/ip6_addr.h" +#include "lwip/ip6.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + + +#if LWIP_IPV6 && LWIP_IPV6_REASS /* don't build if not configured for use in lwipopts.h */ + +/** The IPv6 reassembly timer interval in milliseconds. */ +#define IP6_REASS_TMR_INTERVAL 1000 + +/** IP6_FRAG_COPYHEADER==1: for platforms where sizeof(void*) > 4, "struct + * ip6_reass_helper" is too large to be stored in the IPv6 fragment header, and + * will bleed into the header before it, which may be the IPv6 header or an + * extension header. This means that for each first fragment packet, we need to + * 1) make a copy of some IPv6 header fields (src+dest) that we need later on, + * just in case we do overwrite part of the IPv6 header, and 2) make a copy of + * the header data that we overwrote, so that we can restore it before either + * completing reassembly or sending an ICMPv6 reply. The last part is true even + * if this setting is disabled, but if it is enabled, we need to save a bit + * more data (up to the size of a pointer) because we overwrite more. */ +#ifndef IPV6_FRAG_COPYHEADER +#define IPV6_FRAG_COPYHEADER 0 +#endif + +/* With IPV6_FRAG_COPYHEADER==1, a helper structure may (or, depending on the + * presence of extensions, may not) overwrite part of the IP header. Therefore, + * we copy the fields that we need from the IP header for as long as the helper + * structure may still be in place. This is easier than temporarily restoring + * those fields in the IP header each time we need to perform checks on them. */ +#if IPV6_FRAG_COPYHEADER +#define IPV6_FRAG_SRC(ipr) ((ipr)->src) +#define IPV6_FRAG_DEST(ipr) ((ipr)->dest) +#else /* IPV6_FRAG_COPYHEADER */ +#define IPV6_FRAG_SRC(ipr) ((ipr)->iphdr->src) +#define IPV6_FRAG_DEST(ipr) ((ipr)->iphdr->dest) +#endif /* IPV6_FRAG_COPYHEADER */ + +/** IPv6 reassembly helper struct. + * This is exported because memp needs to know the size. + */ +struct ip6_reassdata { + struct ip6_reassdata *next; + struct pbuf *p; + struct ip6_hdr *iphdr; /* pointer to the first (original) IPv6 header */ +#if IPV6_FRAG_COPYHEADER + ip6_addr_p_t src; /* copy of the source address in the IP header */ + ip6_addr_p_t dest; /* copy of the destination address in the IP header */ + /* This buffer (for the part of the original header that we overwrite) will + * be slightly oversized, but we cannot compute the exact size from here. */ + u8_t orig_hdr[sizeof(struct ip6_frag_hdr) + sizeof(void*)]; +#else /* IPV6_FRAG_COPYHEADER */ + /* In this case we still need the buffer, for sending ICMPv6 replies. */ + u8_t orig_hdr[sizeof(struct ip6_frag_hdr)]; +#endif /* IPV6_FRAG_COPYHEADER */ + u32_t identification; + u16_t datagram_len; + u8_t nexth; + u8_t timer; +#if LWIP_IPV6_SCOPES + u8_t src_zone; /* zone of original packet's source address */ + u8_t dest_zone; /* zone of original packet's destination address */ +#endif /* LWIP_IPV6_SCOPES */ +}; + +#define ip6_reass_init() /* Compatibility define */ +void ip6_reass_tmr(void); +struct pbuf *ip6_reass(struct pbuf *p); + +#endif /* LWIP_IPV6 && LWIP_IPV6_REASS */ + +#if LWIP_IPV6 && LWIP_IPV6_FRAG /* don't build if not configured for use in lwipopts.h */ + +#ifndef LWIP_PBUF_CUSTOM_REF_DEFINED +#define LWIP_PBUF_CUSTOM_REF_DEFINED +/** A custom pbuf that holds a reference to another pbuf, which is freed + * when this custom pbuf is freed. This is used to create a custom PBUF_REF + * that points into the original pbuf. */ +struct pbuf_custom_ref { + /** 'base class' */ + struct pbuf_custom pc; + /** pointer to the original pbuf that is referenced */ + struct pbuf *original; +}; +#endif /* LWIP_PBUF_CUSTOM_REF_DEFINED */ + +err_t ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest); + +#endif /* LWIP_IPV6 && LWIP_IPV6_FRAG */ + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_IP6_FRAG_H */ diff --git a/lib/lwip/include/lwip/ip6_zone.h b/lib/lwip/include/lwip/ip6_zone.h new file mode 100644 index 0000000000..834c32fc3e --- /dev/null +++ b/lib/lwip/include/lwip/ip6_zone.h @@ -0,0 +1,306 @@ +/** + * @file + * + * IPv6 address scopes, zones, and scoping policy. + * + * This header provides the means to implement support for IPv6 address scopes, + * as per RFC 4007. An address scope can be either global or more constrained. + * In lwIP, we say that an address "has a scope" or "is scoped" when its scope + * is constrained, in which case the address is meaningful only in a specific + * "zone." For unicast addresses, only link-local addresses have a scope; in + * that case, the scope is the link. For multicast addresses, there are various + * scopes defined by RFC 4007 and others. For any constrained scope, a system + * must establish a (potentially one-to-many) mapping between zones and local + * interfaces. For example, a link-local address is valid on only one link (its + * zone). That link may be attached to one or more local interfaces. The + * decisions on which scopes are constrained and the mapping between zones and + * interfaces is together what we refer to as the "scoping policy" - more on + * this in a bit. + * + * In lwIP, each IPv6 address has an associated zone index. This zone index may + * be set to "no zone" (IP6_NO_ZONE, 0) or an actual zone. We say that an + * address "has a zone" or "is zoned" when its zone index is *not* set to "no + * zone." In lwIP, in principle, each address should be "properly zoned," which + * means that if the address has a zone if and only if has a scope. As such, it + * is a rule that an unscoped (e.g., global) address must never have a zone. + * Even though one could argue that there is always one zone even for global + * scopes, this rule exists for implementation simplicity. Violation of the + * rule will trigger assertions or otherwise result in undesired behavior. + * + * Backward compatibility prevents us from requiring that applications always + * provide properly zoned addresses. We do enforce the rule that the in the + * lwIP link layer (everything below netif->output_ip6() and in particular ND6) + * *all* addresses are properly zoned. Thus, on the output paths down the + * stack, various places deal with the case of addresses that lack a zone. + * Some of them are best-effort for efficiency (e.g. the PCB bind and connect + * API calls' attempts to add missing zones); ultimately the IPv6 output + * handler (@ref ip6_output_if_src) will set a zone if necessary. + * + * Aside from dealing with scoped addresses lacking a zone, a proper IPv6 + * implementation must also ensure that a packet with a scoped source and/or + * destination address does not leave its zone. This is currently implemented + * in the input and forward functions. However, for output, these checks are + * deliberately omitted in order to keep the implementation lightweight. The + * routing algorithm in @ref ip6_route will take decisions such that it will + * not cause zone violations unless the application sets bad addresses, though. + * + * In terms of scoping policy, lwIP implements the default policy from RFC 4007 + * using macros in this file. This policy considers link-local unicast + * addresses and (only) interface-local and link-local multicast addresses as + * having a scope. For all these addresses, the zone is equal to the interface. + * As shown below in this file, it is possible to implement a custom policy. + */ + +/* + * Copyright (c) 2017 The MINIX 3 Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: David van Moolenbroek david@minix3.org + * + */ +#ifndef LWIP_HDR_IP6_ZONE_H +#define LWIP_HDR_IP6_ZONE_H + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @defgroup ip6_zones IPv6 Zones + * @ingroup ip6 + * @{ + */ + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +/** Identifier for "no zone". */ +#define IP6_NO_ZONE 0 + +#if LWIP_IPV6_SCOPES + +/** Zone initializer for static IPv6 address initialization, including comma. */ +#define IPADDR6_ZONE_INIT , IP6_NO_ZONE + +/** Return the zone index of the given IPv6 address; possibly "no zone". */ +#define ip6_addr_zone(ip6addr) ((ip6addr)->zone) + +/** Does the given IPv6 address have a zone set? (0/1) */ +#define ip6_addr_has_zone(ip6addr) (ip6_addr_zone(ip6addr) != IP6_NO_ZONE) + +/** Set the zone field of an IPv6 address to a particular value. */ +#define ip6_addr_set_zone(ip6addr, zone_idx) ((ip6addr)->zone = (zone_idx)) + +/** Clear the zone field of an IPv6 address, setting it to "no zone". */ +#define ip6_addr_clear_zone(ip6addr) ((ip6addr)->zone = IP6_NO_ZONE) + +/** Copy the zone field from the second IPv6 address to the first one. */ +#define ip6_addr_copy_zone(ip6addr1, ip6addr2) ((ip6addr1).zone = (ip6addr2).zone) + +/** Is the zone field of the given IPv6 address equal to the given zone index? (0/1) */ +#define ip6_addr_equals_zone(ip6addr, zone_idx) ((ip6addr)->zone == (zone_idx)) + +/** @deprecated Renamed to @ref ip6_addr_zone_eq */ +#define ip6_addr_cmp_zone(addr1, addr2) ip6_addr_zone_eq(ip6addr1, ip6addr2) +/** Are the zone fields of the given IPv6 addresses equal? (0/1) + * This macro must only be used on IPv6 addresses of the same scope. */ +#define ip6_addr_zone_eq(ip6addr1, ip6addr2) ((ip6addr1)->zone == (ip6addr2)->zone) + +/** Symbolic constants for the 'type' parameters in some of the macros. + * These exist for efficiency only, allowing the macros to avoid certain tests + * when the address is known not to be of a certain type. Dead code elimination + * will do the rest. IP6_MULTICAST is supported but currently not optimized. + * @see ip6_addr_has_scope, ip6_addr_assign_zone, ip6_addr_lacks_zone. + */ +enum lwip_ipv6_scope_type +{ + /** Unknown */ + IP6_UNKNOWN = 0, + /** Unicast */ + IP6_UNICAST = 1, + /** Multicast */ + IP6_MULTICAST = 2 +}; + +/** IPV6_CUSTOM_SCOPES: together, the following three macro definitions, + * @ref ip6_addr_has_scope, @ref ip6_addr_assign_zone, and + * @ref ip6_addr_test_zone, completely define the lwIP scoping policy. + * The definitions below implement the default policy from RFC 4007 Sec. 6. + * Should an implementation desire to implement a different policy, it can + * define IPV6_CUSTOM_SCOPES to 1 and supply its own definitions for the three + * macros instead. + */ +#ifndef IPV6_CUSTOM_SCOPES +#define IPV6_CUSTOM_SCOPES 0 +#endif /* !IPV6_CUSTOM_SCOPES */ + +#if !IPV6_CUSTOM_SCOPES + +/** + * Determine whether an IPv6 address has a constrained scope, and as such is + * meaningful only if accompanied by a zone index to identify the scope's zone. + * The given address type may be used to eliminate at compile time certain + * checks that will evaluate to false at run time anyway. + * + * This default implementation follows the default model of RFC 4007, where + * only interface-local and link-local scopes are defined. + * + * Even though the unicast loopback address does have an implied link-local + * scope, in this implementation it does not have an explicitly assigned zone + * index. As such it should not be tested for in this macro. + * + * @param ip6addr the IPv6 address (const); only its address part is examined. + * @param type address type; see @ref lwip_ipv6_scope_type. + * @return 1 if the address has a constrained scope, 0 if it does not. + */ +#define ip6_addr_has_scope(ip6addr, type) \ + (ip6_addr_islinklocal(ip6addr) || (((type) != IP6_UNICAST) && \ + (ip6_addr_ismulticast_iflocal(ip6addr) || \ + ip6_addr_ismulticast_linklocal(ip6addr)))) + +/** + * Assign a zone index to an IPv6 address, based on a network interface. If the + * given address has a scope, the assigned zone index is that scope's zone of + * the given netif; otherwise, the assigned zone index is "no zone". + * + * This default implementation follows the default model of RFC 4007, where + * only interface-local and link-local scopes are defined, and the zone index + * of both of those scopes always equals the index of the network interface. + * As such, this default implementation need not distinguish between different + * constrained scopes when assigning the zone. + * + * @param ip6addr the IPv6 address; its address part is examined, and its zone + * index is assigned. + * @param type address type; see @ref lwip_ipv6_scope_type. + * @param netif the network interface (const). + */ +#define ip6_addr_assign_zone(ip6addr, type, netif) \ + (ip6_addr_set_zone((ip6addr), \ + ip6_addr_has_scope((ip6addr), (type)) ? netif_get_index(netif) : 0)) + +/** + * Test whether an IPv6 address is "zone-compatible" with a network interface. + * That is, test whether the network interface is part of the zone associated + * with the address. For efficiency, this macro is only ever called if the + * given address is either scoped or zoned, and thus, it need not test this. + * If an address is scoped but not zoned, or zoned and not scoped, it is + * considered not zone-compatible with any netif. + * + * This default implementation follows the default model of RFC 4007, where + * only interface-local and link-local scopes are defined, and the zone index + * of both of those scopes always equals the index of the network interface. + * As such, there is always only one matching netif for a specific zone index, + * but all call sites of this macro currently support multiple matching netifs + * as well (at no additional expense in the common case). + * + * @param ip6addr the IPv6 address (const). + * @param netif the network interface (const). + * @return 1 if the address is scope-compatible with the netif, 0 if not. + */ +#define ip6_addr_test_zone(ip6addr, netif) \ + (ip6_addr_equals_zone((ip6addr), netif_get_index(netif))) + +#endif /* !IPV6_CUSTOM_SCOPES */ + +/** Does the given IPv6 address have a scope, and as such should also have a + * zone to be meaningful, but does not actually have a zone? (0/1) */ +#define ip6_addr_lacks_zone(ip6addr, type) \ + (!ip6_addr_has_zone(ip6addr) && ip6_addr_has_scope((ip6addr), (type))) + +/** + * Try to select a zone for a scoped address that does not yet have a zone. + * Called from PCB bind and connect routines, for two reasons: 1) to save on + * this (relatively expensive) selection for every individual packet route + * operation and 2) to allow the application to obtain the selected zone from + * the PCB as is customary for e.g. getsockname/getpeername BSD socket calls. + * + * Ideally, callers would always supply a properly zoned address, in which case + * this function would not be needed. It exists both for compatibility with the + * BSD socket API (which accepts zoneless destination addresses) and for + * backward compatibility with pre-scoping lwIP code. + * + * It may be impossible to select a zone, e.g. if there are no netifs. In that + * case, the address's zone field will be left as is. + * + * @param dest the IPv6 address for which to select and set a zone. + * @param src source IPv6 address (const); may be equal to dest. + */ +#define ip6_addr_select_zone(dest, src) do { struct netif *selected_netif; \ + selected_netif = ip6_route((src), (dest)); \ + if (selected_netif != NULL) { \ + ip6_addr_assign_zone((dest), IP6_UNKNOWN, selected_netif); \ + } } while (0) + +/** + * @} + */ + +#else /* LWIP_IPV6_SCOPES */ + +#define IPADDR6_ZONE_INIT +#define ip6_addr_zone(ip6addr) (IP6_NO_ZONE) +#define ip6_addr_has_zone(ip6addr) (0) +#define ip6_addr_set_zone(ip6addr, zone_idx) +#define ip6_addr_clear_zone(ip6addr) +#define ip6_addr_copy_zone(ip6addr1, ip6addr2) +#define ip6_addr_equals_zone(ip6addr, zone_idx) (1) +#define ip6_addr_zone_eq(ip6addr1, ip6addr2) (1) +#define IPV6_CUSTOM_SCOPES 0 +#define ip6_addr_has_scope(ip6addr, type) (0) +#define ip6_addr_assign_zone(ip6addr, type, netif) +#define ip6_addr_test_zone(ip6addr, netif) (1) +#define ip6_addr_lacks_zone(ip6addr, type) (0) +#define ip6_addr_select_zone(ip6addr, src) + +#endif /* LWIP_IPV6_SCOPES */ + +#if LWIP_IPV6_SCOPES && LWIP_IPV6_SCOPES_DEBUG + +/** Verify that the given IPv6 address is properly zoned. */ +#define IP6_ADDR_ZONECHECK(ip6addr) LWIP_ASSERT("IPv6 zone check failed", \ + ip6_addr_has_scope(ip6addr, IP6_UNKNOWN) == ip6_addr_has_zone(ip6addr)) + +/** Verify that the given IPv6 address is properly zoned for the given netif. */ +#define IP6_ADDR_ZONECHECK_NETIF(ip6addr, netif) LWIP_ASSERT("IPv6 netif zone check failed", \ + ip6_addr_has_scope(ip6addr, IP6_UNKNOWN) ? \ + (ip6_addr_has_zone(ip6addr) && \ + (((netif) == NULL) || ip6_addr_test_zone((ip6addr), (netif)))) : \ + !ip6_addr_has_zone(ip6addr)) + +#else /* LWIP_IPV6_SCOPES && LWIP_IPV6_SCOPES_DEBUG */ + +#define IP6_ADDR_ZONECHECK(ip6addr) +#define IP6_ADDR_ZONECHECK_NETIF(ip6addr, netif) + +#endif /* LWIP_IPV6_SCOPES && LWIP_IPV6_SCOPES_DEBUG */ + +#endif /* LWIP_IPV6 */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_IP6_ZONE_H */ diff --git a/lib/lwip/include/lwip/ip_addr.h b/lib/lwip/include/lwip/ip_addr.h new file mode 100644 index 0000000000..06454a4ac4 --- /dev/null +++ b/lib/lwip/include/lwip/ip_addr.h @@ -0,0 +1,468 @@ +/** + * @file + * IP address API (common IPv4 and IPv6) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_IP_ADDR_H +#define LWIP_HDR_IP_ADDR_H + +#include "lwip/opt.h" +#include "lwip/def.h" + +#include "lwip/ip4_addr.h" +#include "lwip/ip6_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** @ingroup ipaddr + * IP address types for use in ip_addr_t.type member. + * @see tcp_new_ip_type(), udp_new_ip_type(), raw_new_ip_type(). + */ +enum lwip_ip_addr_type { + /** IPv4 */ + IPADDR_TYPE_V4 = 0U, + /** IPv6 */ + IPADDR_TYPE_V6 = 6U, + /** IPv4+IPv6 ("dual-stack") */ + IPADDR_TYPE_ANY = 46U +}; + +#if LWIP_IPV4 && LWIP_IPV6 +/** + * @ingroup ipaddr + * A union struct for both IP version's addresses. + * ATTENTION: watch out for its size when adding IPv6 address scope! + */ +typedef struct ip_addr { + union { + ip6_addr_t ip6; + ip4_addr_t ip4; + } u_addr; + /** @ref lwip_ip_addr_type */ + u8_t type; +} ip_addr_t; + +extern const ip_addr_t ip_addr_any_type; + +/** @ingroup ip4addr */ +#define IPADDR4_INIT(u32val) { { { { u32val, 0ul, 0ul, 0ul } IPADDR6_ZONE_INIT } }, IPADDR_TYPE_V4 } +/** @ingroup ip4addr */ +#define IPADDR4_INIT_BYTES(a,b,c,d) IPADDR4_INIT(PP_HTONL(LWIP_MAKEU32(a,b,c,d))) + +/** @ingroup ip6addr */ +#define IPADDR6_INIT(a, b, c, d) { { { { a, b, c, d } IPADDR6_ZONE_INIT } }, IPADDR_TYPE_V6 } +/** @ingroup ip6addr */ +#define IPADDR6_INIT_HOST(a, b, c, d) { { { { PP_HTONL(a), PP_HTONL(b), PP_HTONL(c), PP_HTONL(d) } IPADDR6_ZONE_INIT } }, IPADDR_TYPE_V6 } + +/** @ingroup ipaddr */ +#define IP_IS_ANY_TYPE_VAL(ipaddr) (IP_GET_TYPE(&ipaddr) == IPADDR_TYPE_ANY) +/** @ingroup ipaddr */ +#define IPADDR_ANY_TYPE_INIT { { { { 0ul, 0ul, 0ul, 0ul } IPADDR6_ZONE_INIT } }, IPADDR_TYPE_ANY } + +/** @ingroup ip4addr */ +#define IP_IS_V4_VAL(ipaddr) (IP_GET_TYPE(&ipaddr) == IPADDR_TYPE_V4) +/** @ingroup ip6addr */ +#define IP_IS_V6_VAL(ipaddr) (IP_GET_TYPE(&ipaddr) == IPADDR_TYPE_V6) +/** @ingroup ip4addr */ +#define IP_IS_V4(ipaddr) (((ipaddr) == NULL) || IP_IS_V4_VAL(*(ipaddr))) +/** @ingroup ip6addr */ +#define IP_IS_V6(ipaddr) (((ipaddr) != NULL) && IP_IS_V6_VAL(*(ipaddr))) + +#define IP_SET_TYPE_VAL(ipaddr, iptype) do { (ipaddr).type = (iptype); }while(0) +#define IP_SET_TYPE(ipaddr, iptype) do { if((ipaddr) != NULL) { IP_SET_TYPE_VAL(*(ipaddr), iptype); }}while(0) +#define IP_GET_TYPE(ipaddr) ((ipaddr)->type) + +#define IP_ADDR_RAW_SIZE(ipaddr) (IP_GET_TYPE(&ipaddr) == IPADDR_TYPE_V4 ? sizeof(ip4_addr_t) : sizeof(ip6_addr_t)) + +#define IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ipaddr) (IP_GET_TYPE(&pcb->local_ip) == IP_GET_TYPE(ipaddr)) +#define IP_ADDR_PCB_VERSION_MATCH(pcb, ipaddr) (IP_IS_ANY_TYPE_VAL(pcb->local_ip) || IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ipaddr)) + +/** @ingroup ip6addr + * Convert generic ip address to specific protocol version + */ +#define ip_2_ip6(ipaddr) (&((ipaddr)->u_addr.ip6)) +/** @ingroup ip4addr + * Convert generic ip address to specific protocol version + */ +#define ip_2_ip4(ipaddr) (&((ipaddr)->u_addr.ip4)) + +/** @ingroup ip4addr */ +#define IP_ADDR4(ipaddr,a,b,c,d) do { IP4_ADDR(ip_2_ip4(ipaddr),a,b,c,d); \ + IP_SET_TYPE_VAL(*(ipaddr), IPADDR_TYPE_V4); } while(0) +/** @ingroup ip6addr */ +#define IP_ADDR6(ipaddr,i0,i1,i2,i3) do { IP6_ADDR(ip_2_ip6(ipaddr),i0,i1,i2,i3); \ + IP_SET_TYPE_VAL(*(ipaddr), IPADDR_TYPE_V6); } while(0) +/** @ingroup ip6addr */ +#define IP_ADDR6_HOST(ipaddr,i0,i1,i2,i3) IP_ADDR6(ipaddr,PP_HTONL(i0),PP_HTONL(i1),PP_HTONL(i2),PP_HTONL(i3)) + +#define ip_clear_no4(ipaddr) do { ip_2_ip6(ipaddr)->addr[1] = \ + ip_2_ip6(ipaddr)->addr[2] = \ + ip_2_ip6(ipaddr)->addr[3] = 0; \ + ip6_addr_clear_zone(ip_2_ip6(ipaddr)); }while(0) + +/** @ingroup ipaddr */ +#define ip_addr_copy(dest, src) do{ IP_SET_TYPE_VAL(dest, IP_GET_TYPE(&src)); if(IP_IS_V6_VAL(src)){ \ + ip6_addr_copy(*ip_2_ip6(&(dest)), *ip_2_ip6(&(src))); }else{ \ + ip4_addr_copy(*ip_2_ip4(&(dest)), *ip_2_ip4(&(src))); ip_clear_no4(&dest); }}while(0) +/** @ingroup ip6addr */ +#define ip_addr_copy_from_ip6(dest, src) do{ \ + ip6_addr_copy(*ip_2_ip6(&(dest)), src); IP_SET_TYPE_VAL(dest, IPADDR_TYPE_V6); }while(0) +/** @ingroup ip6addr */ +#define ip_addr_copy_from_ip6_packed(dest, src) do{ \ + ip6_addr_copy_from_packed(*ip_2_ip6(&(dest)), src); IP_SET_TYPE_VAL(dest, IPADDR_TYPE_V6); }while(0) +/** @ingroup ip4addr */ +#define ip_addr_copy_from_ip4(dest, src) do{ \ + ip4_addr_copy(*ip_2_ip4(&(dest)), src); IP_SET_TYPE_VAL(dest, IPADDR_TYPE_V4); ip_clear_no4(&dest); }while(0) +/** @ingroup ip4addr */ +#define ip_addr_set_ip4_u32(ipaddr, val) do{if(ipaddr){ip4_addr_set_u32(ip_2_ip4(ipaddr), val); \ + IP_SET_TYPE(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(ipaddr); }}while(0) +/** @ingroup ip4addr */ +#define ip_addr_set_ip4_u32_val(ipaddr, val) do{ ip4_addr_set_u32(ip_2_ip4(&(ipaddr)), val); \ + IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(&ipaddr); }while(0) +/** @ingroup ip4addr */ +#define ip_addr_get_ip4_u32(ipaddr) (((ipaddr) && IP_IS_V4(ipaddr)) ? \ + ip4_addr_get_u32(ip_2_ip4(ipaddr)) : 0) +/** @ingroup ipaddr */ +#define ip_addr_set(dest, src) do{ IP_SET_TYPE(dest, IP_GET_TYPE(src)); if(IP_IS_V6(src)){ \ + ip6_addr_set(ip_2_ip6(dest), ip_2_ip6(src)); }else{ \ + ip4_addr_set(ip_2_ip4(dest), ip_2_ip4(src)); ip_clear_no4(dest); }}while(0) +/** @ingroup ipaddr */ +#define ip_addr_set_ipaddr(dest, src) ip_addr_set(dest, src) +/** @ingroup ipaddr */ +#define ip_addr_set_zero(ipaddr) do{ \ + ip6_addr_set_zero(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, 0); }while(0) +/** @ingroup ip5addr */ +#define ip_addr_set_zero_ip4(ipaddr) do{ \ + ip6_addr_set_zero(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V4); }while(0) +/** @ingroup ip6addr */ +#define ip_addr_set_zero_ip6(ipaddr) do{ \ + ip6_addr_set_zero(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V6); }while(0) +/** @ingroup ipaddr */ +#define ip_addr_set_any(is_ipv6, ipaddr) do{if(is_ipv6){ \ + ip6_addr_set_any(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V6); }else{ \ + ip4_addr_set_any(ip_2_ip4(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(ipaddr); }}while(0) +/** @ingroup ipaddr */ +#define ip_addr_set_any_val(is_ipv6, ipaddr) do{if(is_ipv6){ \ + ip6_addr_set_any(ip_2_ip6(&(ipaddr))); IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V6); }else{ \ + ip4_addr_set_any(ip_2_ip4(&(ipaddr))); IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(&ipaddr); }}while(0) +/** @ingroup ipaddr */ +#define ip_addr_set_loopback(is_ipv6, ipaddr) do{if(is_ipv6){ \ + ip6_addr_set_loopback(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V6); }else{ \ + ip4_addr_set_loopback(ip_2_ip4(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(ipaddr); }}while(0) +/** @ingroup ipaddr */ +#define ip_addr_set_loopback_val(is_ipv6, ipaddr) do{if(is_ipv6){ \ + ip6_addr_set_loopback(ip_2_ip6(&(ipaddr))); IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V6); }else{ \ + ip4_addr_set_loopback(ip_2_ip4(&(ipaddr))); IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(&ipaddr); }}while(0) +/** @ingroup ipaddr */ +#define ip_addr_set_hton(dest, src) do{if(IP_IS_V6(src)){ \ + ip6_addr_set_hton(ip_2_ip6(dest), ip_2_ip6(src)); IP_SET_TYPE(dest, IPADDR_TYPE_V6); }else{ \ + ip4_addr_set_hton(ip_2_ip4(dest), ip_2_ip4(src)); IP_SET_TYPE(dest, IPADDR_TYPE_V4); ip_clear_no4(ipaddr); }}while(0) +/** @ingroup ipaddr */ +#define ip_addr_get_network(target, host, netmask) do{if(IP_IS_V6(host)){ \ + ip4_addr_set_zero(ip_2_ip4(target)); IP_SET_TYPE(target, IPADDR_TYPE_V6); } else { \ + ip4_addr_get_network(ip_2_ip4(target), ip_2_ip4(host), ip_2_ip4(netmask)); IP_SET_TYPE(target, IPADDR_TYPE_V4); }}while(0) +/** + * @ingroup ipaddr + * @deprecated Renamed to @ref ip_addr_net_eq + */ +#define ip_addr_netcmp(addr1, addr2, mask) ip_addr_net_eq((addr1), (addr2), (mask)) +/** @ingroup ipaddr + * Check if two ip addresses are share the same network, for a specific netmask. */ +#define ip_addr_net_eq(addr1, addr2, mask) ((IP_IS_V6(addr1) && IP_IS_V6(addr2)) ? \ + 0 : \ + ip4_addr_net_eq(ip_2_ip4(addr1), ip_2_ip4(addr2), mask)) +/** + * @ingroup ipaddr + * @deprecated Renamed to @ref ip_addr_eq + */ +#define ip_addr_cmp(addr1, addr2) ip_addr_eq((addr1), (addr2)) +/** @ingroup ipaddr + * Check if two ip addresses are equal. */ +#define ip_addr_eq(addr1, addr2) ((IP_GET_TYPE(addr1) != IP_GET_TYPE(addr2)) ? 0 : (IP_IS_V6_VAL(*(addr1)) ? \ + ip6_addr_eq(ip_2_ip6(addr1), ip_2_ip6(addr2)) : \ + ip4_addr_eq(ip_2_ip4(addr1), ip_2_ip4(addr2)))) +/** + * @ingroup ipaddr + * @deprecated Renamed to @ref ip_addr_zoneless_eq + */ +#define ip_addr_cmp_zoneless(addr1, addr2) ip_addr_zoneless_eq((addr1), (addr2)) +/** @ingroup ipaddr + * Check if two ip addresses are equal, ignoring the zone. */ +#define ip_addr_zoneless_eq(addr1, addr2) ((IP_GET_TYPE(addr1) != IP_GET_TYPE(addr2)) ? 0 : (IP_IS_V6_VAL(*(addr1)) ? \ + ip6_addr_zoneless_eq(ip_2_ip6(addr1), ip_2_ip6(addr2)) : \ + ip4_addr_eq(ip_2_ip4(addr1), ip_2_ip4(addr2)))) +/** @ingroup ipaddr + * Check if an ip address is the 'any' address. */ +#define ip_addr_isany(ipaddr) (((ipaddr) == NULL) ? 1 : ((IP_IS_V6(ipaddr)) ? \ + ip6_addr_isany(ip_2_ip6(ipaddr)) : \ + ip4_addr_isany(ip_2_ip4(ipaddr)))) +/** @ingroup ipaddr + * Check if an ip address is the 'any' address, by value. */ +#define ip_addr_isany_val(ipaddr) ((IP_IS_V6_VAL(ipaddr)) ? \ + ip6_addr_isany_val(*ip_2_ip6(&(ipaddr))) : \ + ip4_addr_isany_val(*ip_2_ip4(&(ipaddr)))) +/** @ingroup ipaddr + * Check if an ip address is a broadcast address. */ +#define ip_addr_isbroadcast(ipaddr, netif) ((IP_IS_V6(ipaddr)) ? \ + 0 : \ + ip4_addr_isbroadcast(ip_2_ip4(ipaddr), netif)) +/** @ingroup ipaddr + * Check inf an ip address is a multicast address. */ +#define ip_addr_ismulticast(ipaddr) ((IP_IS_V6(ipaddr)) ? \ + ip6_addr_ismulticast(ip_2_ip6(ipaddr)) : \ + ip4_addr_ismulticast(ip_2_ip4(ipaddr))) +/** @ingroup ipaddr + * Check inf an ip address is a loopback address. */ +#define ip_addr_isloopback(ipaddr) ((IP_IS_V6(ipaddr)) ? \ + ip6_addr_isloopback(ip_2_ip6(ipaddr)) : \ + ip4_addr_isloopback(ip_2_ip4(ipaddr))) +/** @ingroup ipaddr + * Check inf an ip address is a link-local address. */ +#define ip_addr_islinklocal(ipaddr) ((IP_IS_V6(ipaddr)) ? \ + ip6_addr_islinklocal(ip_2_ip6(ipaddr)) : \ + ip4_addr_islinklocal(ip_2_ip4(ipaddr))) +#define ip_addr_debug_print(debug, ipaddr) do { if(IP_IS_V6(ipaddr)) { \ + ip6_addr_debug_print(debug, ip_2_ip6(ipaddr)); } else { \ + ip4_addr_debug_print(debug, ip_2_ip4(ipaddr)); }}while(0) +#define ip_addr_debug_print_val(debug, ipaddr) do { if(IP_IS_V6_VAL(ipaddr)) { \ + ip6_addr_debug_print_val(debug, *ip_2_ip6(&(ipaddr))); } else { \ + ip4_addr_debug_print_val(debug, *ip_2_ip4(&(ipaddr))); }}while(0) +char *ipaddr_ntoa(const ip_addr_t *addr); +char *ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen); +int ipaddr_aton(const char *cp, ip_addr_t *addr); + +/** @ingroup ipaddr */ +#define IPADDR_STRLEN_MAX IP6ADDR_STRLEN_MAX + +/** @ingroup ipaddr */ +#define ip4_2_ipv4_mapped_ipv6(ip6addr, ip4addr) do { \ + (ip6addr)->addr[3] = (ip4addr)->addr; \ + (ip6addr)->addr[2] = PP_HTONL(0x0000FFFFUL); \ + (ip6addr)->addr[1] = 0; \ + (ip6addr)->addr[0] = 0; \ + ip6_addr_clear_zone(ip6addr); } while(0); + +/** @ingroup ipaddr */ +#define unmap_ipv4_mapped_ipv6(ip4addr, ip6addr) \ + (ip4addr)->addr = (ip6addr)->addr[3]; + +#define IP46_ADDR_ANY(type) (((type) == IPADDR_TYPE_V6)? IP6_ADDR_ANY : IP4_ADDR_ANY) + +#else /* LWIP_IPV4 && LWIP_IPV6 */ + +#define IP_ADDR_PCB_VERSION_MATCH(addr, pcb) 1 +#define IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ipaddr) 1 + +#define ip_addr_set_any_val(is_ipv6, ipaddr) ip_addr_set_any(is_ipv6, &(ipaddr)) +#define ip_addr_set_loopback_val(is_ipv6, ipaddr) ip_addr_set_loopback(is_ipv6, &(ipaddr)) + +#if LWIP_IPV4 + +typedef ip4_addr_t ip_addr_t; +#define IPADDR4_INIT(u32val) { u32val } +#define IPADDR4_INIT_BYTES(a,b,c,d) IPADDR4_INIT(PP_HTONL(LWIP_MAKEU32(a,b,c,d))) +#define IP_IS_V4_VAL(ipaddr) 1 +#define IP_IS_V6_VAL(ipaddr) 0 +#define IP_IS_V4(ipaddr) 1 +#define IP_IS_V6(ipaddr) 0 +#define IP_IS_ANY_TYPE_VAL(ipaddr) 0 +#define IP_SET_TYPE_VAL(ipaddr, iptype) +#define IP_SET_TYPE(ipaddr, iptype) +#define IP_GET_TYPE(ipaddr) IPADDR_TYPE_V4 +#define IP_ADDR_RAW_SIZE(ipaddr) sizeof(ip4_addr_t) +#define ip_2_ip4(ipaddr) (ipaddr) +#define IP_ADDR4(ipaddr,a,b,c,d) IP4_ADDR(ipaddr,a,b,c,d) + +#define ip_addr_copy(dest, src) ip4_addr_copy(dest, src) +#define ip_addr_copy_from_ip4(dest, src) ip4_addr_copy(dest, src) +#define ip_addr_set_ip4_u32(ipaddr, val) ip4_addr_set_u32(ip_2_ip4(ipaddr), val) +#define ip_addr_set_ip4_u32_val(ipaddr, val) ip_addr_set_ip4_u32(&(ipaddr), val) +#define ip_addr_get_ip4_u32(ipaddr) ip4_addr_get_u32(ip_2_ip4(ipaddr)) +#define ip_addr_set(dest, src) ip4_addr_set(dest, src) +#define ip_addr_set_ipaddr(dest, src) ip4_addr_set(dest, src) +#define ip_addr_set_zero(ipaddr) ip4_addr_set_zero(ipaddr) +#define ip_addr_set_zero_ip4(ipaddr) ip4_addr_set_zero(ipaddr) +#define ip_addr_set_any(is_ipv6, ipaddr) ip4_addr_set_any(ipaddr) +#define ip_addr_set_loopback(is_ipv6, ipaddr) ip4_addr_set_loopback(ipaddr) +#define ip_addr_set_hton(dest, src) ip4_addr_set_hton(dest, src) +#define ip_addr_get_network(target, host, mask) ip4_addr_get_network(target, host, mask) +#define ip_addr_netcmp(addr1, addr2, mask) ip4_addr_net_eq(addr1, addr2, mask) +#define ip_addr_net_eq(addr1, addr2, mask) ip4_addr_net_eq(addr1, addr2, mask) +#define ip_addr_cmp(addr1, addr2) ip4_addr_eq(addr1, addr2) +#define ip_addr_eq(addr1, addr2) ip4_addr_eq(addr1, addr2) +#define ip_addr_isany(ipaddr) ip4_addr_isany(ipaddr) +#define ip_addr_isany_val(ipaddr) ip4_addr_isany_val(ipaddr) +#define ip_addr_isloopback(ipaddr) ip4_addr_isloopback(ipaddr) +#define ip_addr_islinklocal(ipaddr) ip4_addr_islinklocal(ipaddr) +#define ip_addr_isbroadcast(addr, netif) ip4_addr_isbroadcast(addr, netif) +#define ip_addr_ismulticast(ipaddr) ip4_addr_ismulticast(ipaddr) +#define ip_addr_debug_print(debug, ipaddr) ip4_addr_debug_print(debug, ipaddr) +#define ip_addr_debug_print_val(debug, ipaddr) ip4_addr_debug_print_val(debug, ipaddr) +#define ipaddr_ntoa(ipaddr) ip4addr_ntoa(ipaddr) +#define ipaddr_ntoa_r(ipaddr, buf, buflen) ip4addr_ntoa_r(ipaddr, buf, buflen) +#define ipaddr_aton(cp, addr) ip4addr_aton(cp, addr) + +#define IPADDR_STRLEN_MAX IP4ADDR_STRLEN_MAX + +#define IP46_ADDR_ANY(type) (IP4_ADDR_ANY) + +#else /* LWIP_IPV4 */ + +typedef ip6_addr_t ip_addr_t; +#define IPADDR6_INIT(a, b, c, d) { { a, b, c, d } IPADDR6_ZONE_INIT } +#define IPADDR6_INIT_HOST(a, b, c, d) { { PP_HTONL(a), PP_HTONL(b), PP_HTONL(c), PP_HTONL(d) } IPADDR6_ZONE_INIT } +#define IP_IS_V4_VAL(ipaddr) 0 +#define IP_IS_V6_VAL(ipaddr) 1 +#define IP_IS_V4(ipaddr) 0 +#define IP_IS_V6(ipaddr) 1 +#define IP_IS_ANY_TYPE_VAL(ipaddr) 0 +#define IP_SET_TYPE_VAL(ipaddr, iptype) +#define IP_SET_TYPE(ipaddr, iptype) +#define IP_GET_TYPE(ipaddr) IPADDR_TYPE_V6 +#define IP_ADDR_RAW_SIZE(ipaddr) sizeof(ip6_addr_t) +#define ip_2_ip6(ipaddr) (ipaddr) +#define IP_ADDR6(ipaddr,i0,i1,i2,i3) IP6_ADDR(ipaddr,i0,i1,i2,i3) +#define IP_ADDR6_HOST(ipaddr,i0,i1,i2,i3) IP_ADDR6(ipaddr,PP_HTONL(i0),PP_HTONL(i1),PP_HTONL(i2),PP_HTONL(i3)) + +#define ip_addr_copy(dest, src) ip6_addr_copy(dest, src) +#define ip_addr_copy_from_ip6(dest, src) ip6_addr_copy(dest, src) +#define ip_addr_copy_from_ip6_packed(dest, src) ip6_addr_copy_from_packed(dest, src) +#define ip_addr_set(dest, src) ip6_addr_set(dest, src) +#define ip_addr_set_ipaddr(dest, src) ip6_addr_set(dest, src) +#define ip_addr_set_zero(ipaddr) ip6_addr_set_zero(ipaddr) +#define ip_addr_set_zero_ip6(ipaddr) ip6_addr_set_zero(ipaddr) +#define ip_addr_set_any(is_ipv6, ipaddr) ip6_addr_set_any(ipaddr) +#define ip_addr_set_loopback(is_ipv6, ipaddr) ip6_addr_set_loopback(ipaddr) +#define ip_addr_set_hton(dest, src) ip6_addr_set_hton(dest, src) +#define ip_addr_get_network(target, host, mask) ip6_addr_set_zero(target) +#define ip_addr_netcmp(addr1, addr2, mask) 0 +#define ip_addr_net_eq(addr1, addr2, mask) 0 +#define ip_addr_cmp(addr1, addr2) ip6_addr_eq(addr1, addr2) +#define ip_addr_eq(addr1, addr2) ip6_addr_eq(addr1, addr2) +#define ip_addr_cmp_zoneless(addr1, addr2) ip6_addr_zoneless_eq(addr1, addr2) +#define ip_addr_zoneless_eq(addr1, addr2) ip6_addr_zoneless_eq(addr1, addr2) +#define ip_addr_isany(ipaddr) ip6_addr_isany(ipaddr) +#define ip_addr_isany_val(ipaddr) ip6_addr_isany_val(ipaddr) +#define ip_addr_isloopback(ipaddr) ip6_addr_isloopback(ipaddr) +#define ip_addr_islinklocal(ipaddr) ip6_addr_islinklocal(ipaddr) +#define ip_addr_isbroadcast(addr, netif) 0 +#define ip_addr_ismulticast(ipaddr) ip6_addr_ismulticast(ipaddr) +#define ip_addr_debug_print(debug, ipaddr) ip6_addr_debug_print(debug, ipaddr) +#define ip_addr_debug_print_val(debug, ipaddr) ip6_addr_debug_print_val(debug, ipaddr) +#define ipaddr_ntoa(ipaddr) ip6addr_ntoa(ipaddr) +#define ipaddr_ntoa_r(ipaddr, buf, buflen) ip6addr_ntoa_r(ipaddr, buf, buflen) +#define ipaddr_aton(cp, addr) ip6addr_aton(cp, addr) + +#define IPADDR_STRLEN_MAX IP6ADDR_STRLEN_MAX + +#define IP46_ADDR_ANY(type) (IP6_ADDR_ANY) + +#endif /* LWIP_IPV4 */ +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + +#if LWIP_IPV4 + +extern const ip_addr_t ip_addr_any; +extern const ip_addr_t ip_addr_broadcast; + +/** + * @ingroup ip4addr + * Can be used as a fixed/const ip_addr_t + * for the IP wildcard. + * Defined to @ref IP4_ADDR_ANY when IPv4 is enabled. + * Defined to @ref IP6_ADDR_ANY in IPv6 only systems. + * Use this if you can handle IPv4 _AND_ IPv6 addresses. + * Use @ref IP4_ADDR_ANY or @ref IP6_ADDR_ANY when the IP + * type matters. + */ +#define IP_ADDR_ANY IP4_ADDR_ANY +/** + * @ingroup ip4addr + * Can be used as a fixed/const ip_addr_t + * for the IPv4 wildcard and the broadcast address + */ +#define IP4_ADDR_ANY (&ip_addr_any) +/** + * @ingroup ip4addr + * Can be used as a fixed/const ip4_addr_t + * for the wildcard and the broadcast address + */ +#define IP4_ADDR_ANY4 (ip_2_ip4(&ip_addr_any)) + +/** @ingroup ip4addr */ +#define IP_ADDR_BROADCAST (&ip_addr_broadcast) +/** @ingroup ip4addr */ +#define IP4_ADDR_BROADCAST (ip_2_ip4(&ip_addr_broadcast)) + +#endif /* LWIP_IPV4*/ + +#if LWIP_IPV6 + +extern const ip_addr_t ip6_addr_any; + +/** + * @ingroup ip6addr + * IP6_ADDR_ANY can be used as a fixed ip_addr_t + * for the IPv6 wildcard address + */ +#define IP6_ADDR_ANY (&ip6_addr_any) +/** + * @ingroup ip6addr + * IP6_ADDR_ANY6 can be used as a fixed ip6_addr_t + * for the IPv6 wildcard address + */ +#define IP6_ADDR_ANY6 (ip_2_ip6(&ip6_addr_any)) + +#if !LWIP_IPV4 +/** IPv6-only configurations */ +#define IP_ADDR_ANY IP6_ADDR_ANY +#endif /* !LWIP_IPV4 */ + +#endif + +/** @ingroup ipaddr + * Macro representing the 'any' address. */ +#if LWIP_IPV4 && LWIP_IPV6 +#define IP_ANY_TYPE (&ip_addr_any_type) +#else +#define IP_ANY_TYPE IP_ADDR_ANY +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_IP_ADDR_H */ diff --git a/lib/lwip/include/lwip/mem.h b/lib/lwip/include/lwip/mem.h new file mode 100644 index 0000000000..ff208d25c3 --- /dev/null +++ b/lib/lwip/include/lwip/mem.h @@ -0,0 +1,82 @@ +/** + * @file + * Heap API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_MEM_H +#define LWIP_HDR_MEM_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if MEM_LIBC_MALLOC + +#include "lwip/arch.h" + +typedef size_t mem_size_t; +#define MEM_SIZE_F SZT_F + +#elif MEM_USE_POOLS + +typedef u16_t mem_size_t; +#define MEM_SIZE_F U16_F + +#else + +/* MEM_SIZE would have to be aligned, but using 64000 here instead of + * 65535 leaves some room for alignment... + */ +#if MEM_SIZE > 64000L +typedef u32_t mem_size_t; +#define MEM_SIZE_F U32_F +#else +typedef u16_t mem_size_t; +#define MEM_SIZE_F U16_F +#endif /* MEM_SIZE > 64000 */ +#endif + +void mem_init(void); +void *mem_trim(void *mem, mem_size_t size); +void *mem_malloc(mem_size_t size); +void *mem_calloc(mem_size_t count, mem_size_t size); +void mem_free(void *mem); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_MEM_H */ diff --git a/lib/lwip/include/lwip/memp.h b/lib/lwip/include/lwip/memp.h new file mode 100644 index 0000000000..1630b26c2c --- /dev/null +++ b/lib/lwip/include/lwip/memp.h @@ -0,0 +1,155 @@ +/** + * @file + * Memory pool API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#ifndef LWIP_HDR_MEMP_H +#define LWIP_HDR_MEMP_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* run once with empty definition to handle all custom includes in lwippools.h */ +#define LWIP_MEMPOOL(name,num,size,desc) +#include "lwip/priv/memp_std.h" + +/** Create the list of all memory pools managed by memp. MEMP_MAX represents a NULL pool at the end */ +typedef enum { +#define LWIP_MEMPOOL(name,num,size,desc) MEMP_##name, +#include "lwip/priv/memp_std.h" + MEMP_MAX +} memp_t; + +#include "lwip/priv/memp_priv.h" +#include "lwip/stats.h" + +extern const struct memp_desc* const memp_pools[MEMP_MAX]; + +/** + * @ingroup mempool + * Declare prototype for private memory pool if it is used in multiple files + */ +#define LWIP_MEMPOOL_PROTOTYPE(name) extern const struct memp_desc memp_ ## name + +#if MEMP_MEM_MALLOC + +#define LWIP_MEMPOOL_DECLARE(name,num,size,desc) \ + LWIP_MEMPOOL_DECLARE_STATS_INSTANCE(memp_stats_ ## name) \ + const struct memp_desc memp_ ## name = { \ + DECLARE_LWIP_MEMPOOL_DESC(desc) \ + LWIP_MEMPOOL_DECLARE_STATS_REFERENCE(memp_stats_ ## name) \ + LWIP_MEM_ALIGN_SIZE(size) \ + }; + +#else /* MEMP_MEM_MALLOC */ + +/** + * @ingroup mempool + * Declare a private memory pool + * Private mempools example: + * .h: only when pool is used in multiple .c files: LWIP_MEMPOOL_PROTOTYPE(my_private_pool); + * .c: + * - in global variables section: LWIP_MEMPOOL_DECLARE(my_private_pool, 10, sizeof(foo), "Some description") + * - call ONCE before using pool (e.g. in some init() function): LWIP_MEMPOOL_INIT(my_private_pool); + * - allocate: void* my_new_mem = LWIP_MEMPOOL_ALLOC(my_private_pool); + * - free: LWIP_MEMPOOL_FREE(my_private_pool, my_new_mem); + * + * To relocate a pool, declare it as extern in cc.h. Example for GCC: + * extern u8_t __attribute__((section(".onchip_mem"))) memp_memory_my_private_pool_base[]; + */ +#define LWIP_MEMPOOL_DECLARE(name,num,size,desc) \ + LWIP_DECLARE_MEMORY_ALIGNED(memp_memory_ ## name ## _base, ((num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size)))); \ + \ + LWIP_MEMPOOL_DECLARE_STATS_INSTANCE(memp_stats_ ## name) \ + \ + static struct memp *memp_tab_ ## name; \ + \ + const struct memp_desc memp_ ## name = { \ + DECLARE_LWIP_MEMPOOL_DESC(desc) \ + LWIP_MEMPOOL_DECLARE_STATS_REFERENCE(memp_stats_ ## name) \ + LWIP_MEM_ALIGN_SIZE(size), \ + (num), \ + memp_memory_ ## name ## _base, \ + &memp_tab_ ## name \ + }; + +#endif /* MEMP_MEM_MALLOC */ + +/** + * @ingroup mempool + * Initialize a private memory pool + */ +#define LWIP_MEMPOOL_INIT(name) memp_init_pool(&memp_ ## name) +/** + * @ingroup mempool + * Allocate from a private memory pool + */ +#define LWIP_MEMPOOL_ALLOC(name) memp_malloc_pool(&memp_ ## name) +/** + * @ingroup mempool + * Free element from a private memory pool + */ +#define LWIP_MEMPOOL_FREE(name, x) memp_free_pool(&memp_ ## name, (x)) + +#if MEM_USE_POOLS +/** This structure is used to save the pool one element came from. + * This has to be defined here as it is required for pool size calculation. */ +struct memp_malloc_helper +{ + memp_t poolnr; +#if MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS) + u16_t size; +#endif /* MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS) */ +}; +#endif /* MEM_USE_POOLS */ + +void memp_init(void); + +#if MEMP_OVERFLOW_CHECK +void *memp_malloc_fn(memp_t type, const char* file, const int line); +#define memp_malloc(t) memp_malloc_fn((t), __FILE__, __LINE__) +#else +void *memp_malloc(memp_t type); +#endif +void memp_free(memp_t type, void *mem); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_MEMP_H */ diff --git a/lib/lwip/include/lwip/mld6.h b/lib/lwip/include/lwip/mld6.h new file mode 100644 index 0000000000..2764fdd42d --- /dev/null +++ b/lib/lwip/include/lwip/mld6.h @@ -0,0 +1,99 @@ +/** + * @file + * + * Multicast listener discovery for IPv6. Aims to be compliant with RFC 2710. + * No support for MLDv2. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#ifndef LWIP_HDR_MLD6_H +#define LWIP_HDR_MLD6_H + +#include "lwip/opt.h" + +#if LWIP_IPV6_MLD && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/pbuf.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** MLD group */ +struct mld_group { + /** next link */ + struct mld_group *next; + /** multicast address */ + ip6_addr_t group_address; + /** signifies we were the last person to report */ + u8_t last_reporter_flag; + /** current state of the group */ + u8_t group_state; + /** timer for reporting */ + u16_t timer; + /** counter of simultaneous uses */ + u8_t use; +}; + +#define MLD6_TMR_INTERVAL 100 /* Milliseconds */ + +err_t mld6_stop(struct netif *netif); +void mld6_report_groups(struct netif *netif); +void mld6_tmr(void); +struct mld_group *mld6_lookfor_group(struct netif *ifp, const ip6_addr_t *addr); +void mld6_input(struct pbuf *p, struct netif *inp); +err_t mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr); +err_t mld6_joingroup_netif(struct netif *netif, const ip6_addr_t *groupaddr); +err_t mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr); +err_t mld6_leavegroup_netif(struct netif *netif, const ip6_addr_t *groupaddr); + +/** @ingroup mld6 + * Get list head of MLD6 groups for netif. + * Note: The allnodes group IP is NOT in the list, since it must always + * be received for correct IPv6 operation. + * @see @ref netif_set_mld_mac_filter() + */ +#define netif_mld6_data(netif) ((struct mld_group *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6_MLD && LWIP_IPV6 */ + +#endif /* LWIP_HDR_MLD6_H */ diff --git a/lib/lwip/include/lwip/nd6.h b/lib/lwip/include/lwip/nd6.h new file mode 100644 index 0000000000..c30e624f02 --- /dev/null +++ b/lib/lwip/include/lwip/nd6.h @@ -0,0 +1,90 @@ +/** + * @file + * + * Neighbor discovery and stateless address autoconfiguration for IPv6. + * Aims to be compliant with RFC 4861 (Neighbor discovery) and RFC 4862 + * (Address autoconfiguration). + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#ifndef LWIP_HDR_ND6_H +#define LWIP_HDR_ND6_H + +#include "lwip/opt.h" + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/ip6_addr.h" +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** 1 second period */ +#define ND6_TMR_INTERVAL 1000 + +/** Router solicitations are sent in 4 second intervals (see RFC 4861, ch. 6.3.7) */ +#ifndef ND6_RTR_SOLICITATION_INTERVAL +#define ND6_RTR_SOLICITATION_INTERVAL 4000 +#endif + +struct pbuf; +struct netif; + +void nd6_tmr(void); +void nd6_input(struct pbuf *p, struct netif *inp); +void nd6_clear_destination_cache(void); +struct netif *nd6_find_route(const ip6_addr_t *ip6addr); +err_t nd6_get_next_hop_addr_or_queue(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr, const u8_t **hwaddrp); +u16_t nd6_get_destination_mtu(const ip6_addr_t *ip6addr, struct netif *netif); +#if LWIP_ND6_TCP_REACHABILITY_HINTS +void nd6_reachability_hint(const ip6_addr_t *ip6addr); +#endif /* LWIP_ND6_TCP_REACHABILITY_HINTS */ +void nd6_cleanup_netif(struct netif *netif); +#if LWIP_IPV6_MLD +void nd6_adjust_mld_membership(struct netif *netif, s8_t addr_idx, u8_t new_state); +#endif /* LWIP_IPV6_MLD */ +void nd6_restart_netif(struct netif *netif); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 */ + +#endif /* LWIP_HDR_ND6_H */ diff --git a/lib/lwip/include/lwip/netbuf.h b/lib/lwip/include/lwip/netbuf.h new file mode 100644 index 0000000000..42a911bca3 --- /dev/null +++ b/lib/lwip/include/lwip/netbuf.h @@ -0,0 +1,116 @@ +/** + * @file + * netbuf API (for netconn API) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_NETBUF_H +#define LWIP_HDR_NETBUF_H + +#include "lwip/opt.h" + +#if LWIP_NETCONN || LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ +/* Note: Netconn API is always available when sockets are enabled - + * sockets are implemented on top of them */ + +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" +#include "lwip/ip6_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** This netbuf has dest-addr/port set */ +#define NETBUF_FLAG_DESTADDR 0x01 +/** This netbuf includes a checksum */ +#define NETBUF_FLAG_CHKSUM 0x02 + +/** "Network buffer" - contains data and addressing info */ +struct netbuf { + struct pbuf *p, *ptr; + ip_addr_t addr; + u16_t port; +#if LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY + u8_t flags; + u16_t toport_chksum; +#if LWIP_NETBUF_RECVINFO + ip_addr_t toaddr; +#endif /* LWIP_NETBUF_RECVINFO */ +#endif /* LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY */ +}; + +/* Network buffer functions: */ +struct netbuf * netbuf_new (void); +void netbuf_delete (struct netbuf *buf); +void * netbuf_alloc (struct netbuf *buf, u16_t size); +void netbuf_free (struct netbuf *buf); +err_t netbuf_ref (struct netbuf *buf, + const void *dataptr, u16_t size); +void netbuf_chain (struct netbuf *head, struct netbuf *tail); + +err_t netbuf_data (struct netbuf *buf, + void **dataptr, u16_t *len); +s8_t netbuf_next (struct netbuf *buf); +void netbuf_first (struct netbuf *buf); + + +#define netbuf_copy_partial(buf, dataptr, len, offset) \ + pbuf_copy_partial((buf)->p, (dataptr), (len), (offset)) +#define netbuf_copy(buf,dataptr,len) netbuf_copy_partial(buf, dataptr, len, 0) +#define netbuf_take(buf, dataptr, len) pbuf_take((buf)->p, dataptr, len) +#define netbuf_len(buf) ((buf)->p->tot_len) +#define netbuf_fromaddr(buf) (&((buf)->addr)) +#define netbuf_set_fromaddr(buf, fromaddr) ip_addr_set(&((buf)->addr), fromaddr) +#define netbuf_fromport(buf) ((buf)->port) +#if LWIP_NETBUF_RECVINFO +#define netbuf_destaddr(buf) (&((buf)->toaddr)) +#define netbuf_set_destaddr(buf, destaddr) ip_addr_set(&((buf)->toaddr), destaddr) +#if LWIP_CHECKSUM_ON_COPY +#define netbuf_destport(buf) (((buf)->flags & NETBUF_FLAG_DESTADDR) ? (buf)->toport_chksum : 0) +#else /* LWIP_CHECKSUM_ON_COPY */ +#define netbuf_destport(buf) ((buf)->toport_chksum) +#endif /* LWIP_CHECKSUM_ON_COPY */ +#endif /* LWIP_NETBUF_RECVINFO */ +#if LWIP_CHECKSUM_ON_COPY +#define netbuf_set_chksum(buf, chksum) do { (buf)->flags = NETBUF_FLAG_CHKSUM; \ + (buf)->toport_chksum = chksum; } while(0) +#endif /* LWIP_CHECKSUM_ON_COPY */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_NETCONN || LWIP_SOCKET */ + +#endif /* LWIP_HDR_NETBUF_H */ diff --git a/lib/lwip/include/lwip/netdb.h b/lib/lwip/include/lwip/netdb.h new file mode 100644 index 0000000000..d3d15dfac5 --- /dev/null +++ b/lib/lwip/include/lwip/netdb.h @@ -0,0 +1,150 @@ +/** + * @file + * NETDB API (sockets) + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt + * + */ +#ifndef LWIP_HDR_NETDB_H +#define LWIP_HDR_NETDB_H + +#include "lwip/opt.h" + +#if LWIP_DNS && LWIP_SOCKET + +#include "lwip/arch.h" +#include "lwip/inet.h" +#include "lwip/sockets.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* some rarely used options */ +#ifndef LWIP_DNS_API_DECLARE_H_ERRNO +#define LWIP_DNS_API_DECLARE_H_ERRNO 1 +#endif + +#ifndef LWIP_DNS_API_DEFINE_ERRORS +#define LWIP_DNS_API_DEFINE_ERRORS 1 +#endif + +#ifndef LWIP_DNS_API_DEFINE_FLAGS +#define LWIP_DNS_API_DEFINE_FLAGS 1 +#endif + +#ifndef LWIP_DNS_API_DECLARE_STRUCTS +#define LWIP_DNS_API_DECLARE_STRUCTS 1 +#endif + +#if LWIP_DNS_API_DEFINE_ERRORS +/** Errors used by the DNS API functions, h_errno can be one of them */ +#define EAI_NONAME 200 +#define EAI_SERVICE 201 +#define EAI_FAIL 202 +#define EAI_MEMORY 203 +#define EAI_FAMILY 204 + +#define HOST_NOT_FOUND 210 +#define NO_DATA 211 +#define NO_RECOVERY 212 +#define TRY_AGAIN 213 +#endif /* LWIP_DNS_API_DEFINE_ERRORS */ + +#if LWIP_DNS_API_DEFINE_FLAGS +/* input flags for struct addrinfo */ +#define AI_PASSIVE 0x01 +#define AI_CANONNAME 0x02 +#define AI_NUMERICHOST 0x04 +#define AI_NUMERICSERV 0x08 +#define AI_V4MAPPED 0x10 +#define AI_ALL 0x20 +#define AI_ADDRCONFIG 0x40 +#endif /* LWIP_DNS_API_DEFINE_FLAGS */ + +#if LWIP_DNS_API_DECLARE_STRUCTS +struct hostent { + char *h_name; /* Official name of the host. */ + char **h_aliases; /* A pointer to an array of pointers to alternative host names, + terminated by a null pointer. */ + int h_addrtype; /* Address type. */ + int h_length; /* The length, in bytes, of the address. */ + char **h_addr_list; /* A pointer to an array of pointers to network addresses (in + network byte order) for the host, terminated by a null pointer. */ +#define h_addr h_addr_list[0] /* for backward compatibility */ +}; + +struct addrinfo { + int ai_flags; /* Input flags. */ + int ai_family; /* Address family of socket. */ + int ai_socktype; /* Socket type. */ + int ai_protocol; /* Protocol of socket. */ + socklen_t ai_addrlen; /* Length of socket address. */ + struct sockaddr *ai_addr; /* Socket address of socket. */ + char *ai_canonname; /* Canonical name of service location. */ + struct addrinfo *ai_next; /* Pointer to next in list. */ +}; +#endif /* LWIP_DNS_API_DECLARE_STRUCTS */ + +#define NETDB_ELEM_SIZE (sizeof(struct addrinfo) + sizeof(struct sockaddr_storage) + DNS_MAX_NAME_LENGTH + 1) + +#if LWIP_DNS_API_DECLARE_H_ERRNO +/* application accessible error code set by the DNS API functions */ +extern int h_errno; +#endif /* LWIP_DNS_API_DECLARE_H_ERRNO*/ + +struct hostent *lwip_gethostbyname(const char *name); +int lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf, + size_t buflen, struct hostent **result, int *h_errnop); +void lwip_freeaddrinfo(struct addrinfo *ai); +int lwip_getaddrinfo(const char *nodename, + const char *servname, + const struct addrinfo *hints, + struct addrinfo **res); + +#if LWIP_COMPAT_SOCKETS +/** @ingroup netdbapi */ +#define gethostbyname(name) lwip_gethostbyname(name) +/** @ingroup netdbapi */ +#define gethostbyname_r(name, ret, buf, buflen, result, h_errnop) \ + lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop) +/** @ingroup netdbapi */ +#define freeaddrinfo(addrinfo) lwip_freeaddrinfo(addrinfo) +/** @ingroup netdbapi */ +#define getaddrinfo(nodname, servname, hints, res) \ + lwip_getaddrinfo(nodname, servname, hints, res) +#endif /* LWIP_COMPAT_SOCKETS */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_DNS && LWIP_SOCKET */ + +#endif /* LWIP_HDR_NETDB_H */ diff --git a/lib/lwip/include/lwip/netif.h b/lib/lwip/include/lwip/netif.h new file mode 100644 index 0000000000..0cde2c2ad2 --- /dev/null +++ b/lib/lwip/include/lwip/netif.h @@ -0,0 +1,698 @@ +/** + * @file + * netif API (to be used from TCPIP thread) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_NETIF_H +#define LWIP_HDR_NETIF_H + +#include "lwip/opt.h" + +#define ENABLE_LOOPBACK (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF) + +#include "lwip/err.h" + +#include "lwip/ip_addr.h" + +#include "lwip/def.h" +#include "lwip/pbuf.h" +#include "lwip/stats.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Throughout this file, IP addresses are expected to be in + * the same byte order as in IP_PCB. */ + +/** Must be the maximum of all used hardware address lengths + across all types of interfaces in use. + This does not have to be changed, normally. */ +#ifndef NETIF_MAX_HWADDR_LEN +#define NETIF_MAX_HWADDR_LEN 6U +#endif + +/** The size of a fully constructed netif name which the + * netif can be identified by in APIs. Composed of + * 2 chars, 3 (max) digits, and 1 \0 + */ +#define NETIF_NAMESIZE 6 + +/** + * @defgroup netif_flags Flags + * @ingroup netif + * @{ + */ + +/** Whether the network interface is 'up'. This is + * a software flag used to control whether this network + * interface is enabled and processes traffic. + * It must be set by the startup code before this netif can be used + * (also for dhcp/autoip). + */ +#define NETIF_FLAG_UP 0x01U +/** If set, the netif has broadcast capability. + * Set by the netif driver in its init function. */ +#define NETIF_FLAG_BROADCAST 0x02U +/** If set, the interface has an active link + * (set by the network interface driver). + * Either set by the netif driver in its init function (if the link + * is up at that time) or at a later point once the link comes up + * (if link detection is supported by the hardware). */ +#define NETIF_FLAG_LINK_UP 0x04U +/** If set, the netif is an ethernet device using ARP. + * Set by the netif driver in its init function. + * Used to check input packet types and use of DHCP. */ +#define NETIF_FLAG_ETHARP 0x08U +/** If set, the netif is an ethernet device. It might not use + * ARP or TCP/IP if it is used for PPPoE only. + */ +#define NETIF_FLAG_ETHERNET 0x10U +/** If set, the netif has IGMP capability. + * Set by the netif driver in its init function. */ +#define NETIF_FLAG_IGMP 0x20U +/** If set, the netif has MLD6 capability. + * Set by the netif driver in its init function. */ +#define NETIF_FLAG_MLD6 0x40U + +/** + * @} + */ + +enum lwip_internal_netif_client_data_index +{ +#if LWIP_IPV4 +#if LWIP_DHCP + LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, +#endif +#if LWIP_AUTOIP + LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP, +#endif +#if LWIP_ACD + LWIP_NETIF_CLIENT_DATA_INDEX_ACD, +#endif +#if LWIP_IGMP + LWIP_NETIF_CLIENT_DATA_INDEX_IGMP, +#endif +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 +#if LWIP_IPV6_DHCP6 + LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, +#endif +#if LWIP_IPV6_MLD + LWIP_NETIF_CLIENT_DATA_INDEX_MLD6, +#endif +#endif /* LWIP_IPV6 */ + LWIP_NETIF_CLIENT_DATA_INDEX_MAX +}; + +#if LWIP_CHECKSUM_CTRL_PER_NETIF +#define NETIF_CHECKSUM_GEN_IP 0x0001 +#define NETIF_CHECKSUM_GEN_UDP 0x0002 +#define NETIF_CHECKSUM_GEN_TCP 0x0004 +#define NETIF_CHECKSUM_GEN_ICMP 0x0008 +#define NETIF_CHECKSUM_GEN_ICMP6 0x0010 +#define NETIF_CHECKSUM_CHECK_IP 0x0100 +#define NETIF_CHECKSUM_CHECK_UDP 0x0200 +#define NETIF_CHECKSUM_CHECK_TCP 0x0400 +#define NETIF_CHECKSUM_CHECK_ICMP 0x0800 +#define NETIF_CHECKSUM_CHECK_ICMP6 0x1000 +#define NETIF_CHECKSUM_ENABLE_ALL 0xFFFF +#define NETIF_CHECKSUM_DISABLE_ALL 0x0000 +#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */ + +struct netif; + +/** MAC Filter Actions, these are passed to a netif's igmp_mac_filter or + * mld_mac_filter callback function. */ +enum netif_mac_filter_action { + /** Delete a filter entry */ + NETIF_DEL_MAC_FILTER = 0, + /** Add a filter entry */ + NETIF_ADD_MAC_FILTER = 1 +}; + +/** Function prototype for netif init functions. Set up flags and output/linkoutput + * callback functions in this function. + * + * @param netif The netif to initialize + */ +typedef err_t (*netif_init_fn)(struct netif *netif); +/** Function prototype for netif->input functions. This function is saved as 'input' + * callback function in the netif struct. Call it when a packet has been received. + * + * @param p The received packet, copied into a pbuf + * @param inp The netif which received the packet + * @return ERR_OK if the packet was handled + * != ERR_OK is the packet was NOT handled, in this case, the caller has + * to free the pbuf + */ +typedef err_t (*netif_input_fn)(struct pbuf *p, struct netif *inp); + +#if LWIP_IPV4 +/** Function prototype for netif->output functions. Called by lwIP when a packet + * shall be sent. For ethernet netif, set this to 'etharp_output' and set + * 'linkoutput'. + * + * @param netif The netif which shall send a packet + * @param p The packet to send (p->payload points to IP header) + * @param ipaddr The IP address to which the packet shall be sent + */ +typedef err_t (*netif_output_fn)(struct netif *netif, struct pbuf *p, + const ip4_addr_t *ipaddr); +#endif /* LWIP_IPV4*/ + +#if LWIP_IPV6 +/** Function prototype for netif->output_ip6 functions. Called by lwIP when a packet + * shall be sent. For ethernet netif, set this to 'ethip6_output' and set + * 'linkoutput'. + * + * @param netif The netif which shall send a packet + * @param p The packet to send (p->payload points to IP header) + * @param ipaddr The IPv6 address to which the packet shall be sent + */ +typedef err_t (*netif_output_ip6_fn)(struct netif *netif, struct pbuf *p, + const ip6_addr_t *ipaddr); +#endif /* LWIP_IPV6 */ + +/** Function prototype for netif->linkoutput functions. Only used for ethernet + * netifs. This function is called by ARP when a packet shall be sent. + * + * @param netif The netif which shall send a packet + * @param p The packet to send (raw ethernet packet) + */ +typedef err_t (*netif_linkoutput_fn)(struct netif *netif, struct pbuf *p); +/** Function prototype for netif status- or link-callback functions. */ +typedef void (*netif_status_callback_fn)(struct netif *netif); +#if LWIP_IPV4 && LWIP_IGMP +/** Function prototype for netif igmp_mac_filter functions */ +typedef err_t (*netif_igmp_mac_filter_fn)(struct netif *netif, + const ip4_addr_t *group, enum netif_mac_filter_action action); +#endif /* LWIP_IPV4 && LWIP_IGMP */ +#if LWIP_IPV6 && LWIP_IPV6_MLD +/** Function prototype for netif mld_mac_filter functions */ +typedef err_t (*netif_mld_mac_filter_fn)(struct netif *netif, + const ip6_addr_t *group, enum netif_mac_filter_action action); +#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ + +#if LWIP_DHCP || LWIP_AUTOIP || LWIP_IGMP || LWIP_IPV6_MLD || LWIP_IPV6_DHCP6 || (LWIP_NUM_NETIF_CLIENT_DATA > 0) +#if LWIP_NUM_NETIF_CLIENT_DATA > 0 +u8_t netif_alloc_client_data_id(void); +#endif +/** @ingroup netif_cd + * Set client data. Obtain ID from netif_alloc_client_data_id(). + */ +#define netif_set_client_data(netif, id, data) netif_get_client_data(netif, id) = (data) +/** @ingroup netif_cd + * Get client data. Obtain ID from netif_alloc_client_data_id(). + */ +#define netif_get_client_data(netif, id) (netif)->client_data[(id)] +#endif + +#if (LWIP_IPV4 && LWIP_ARP && (ARP_TABLE_SIZE > 0x7f)) || (LWIP_IPV6 && (LWIP_ND6_NUM_DESTINATIONS > 0x7f)) +typedef u16_t netif_addr_idx_t; +#define NETIF_ADDR_IDX_MAX 0x7FFF +#else +typedef u8_t netif_addr_idx_t; +#define NETIF_ADDR_IDX_MAX 0x7F +#endif + +#if LWIP_NETIF_HWADDRHINT || LWIP_VLAN_PCP + #define LWIP_NETIF_USE_HINTS 1 + struct netif_hint { +#if LWIP_NETIF_HWADDRHINT + u8_t addr_hint; +#endif +#if LWIP_VLAN_PCP + /** VLAN hader is set if this is >= 0 (but must be <= 0xFFFF) */ + s32_t tci; +#endif + }; +#else /* LWIP_NETIF_HWADDRHINT || LWIP_VLAN_PCP */ + #define LWIP_NETIF_USE_HINTS 0 +#endif /* LWIP_NETIF_HWADDRHINT || LWIP_VLAN_PCP*/ + +/** Generic data structure used for all lwIP network interfaces. + * The following fields should be filled in by the initialization + * function for the device driver: hwaddr_len, hwaddr[], mtu, flags */ +struct netif { +#if !LWIP_SINGLE_NETIF + /** pointer to next in linked list */ + struct netif *next; +#endif + +#if LWIP_IPV4 + /** IP address configuration in network byte order */ + ip_addr_t ip_addr; + ip_addr_t netmask; + ip_addr_t gw; +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 + /** Array of IPv6 addresses for this netif. */ + ip_addr_t ip6_addr[LWIP_IPV6_NUM_ADDRESSES]; + /** The state of each IPv6 address (Tentative, Preferred, etc). + * @see ip6_addr.h */ + u8_t ip6_addr_state[LWIP_IPV6_NUM_ADDRESSES]; +#if LWIP_IPV6_ADDRESS_LIFETIMES + /** Remaining valid and preferred lifetime of each IPv6 address, in seconds. + * For valid lifetimes, the special value of IP6_ADDR_LIFE_STATIC (0) + * indicates the address is static and has no lifetimes. */ + u32_t ip6_addr_valid_life[LWIP_IPV6_NUM_ADDRESSES]; + u32_t ip6_addr_pref_life[LWIP_IPV6_NUM_ADDRESSES]; +#endif /* LWIP_IPV6_ADDRESS_LIFETIMES */ +#endif /* LWIP_IPV6 */ + /** This function is called by the network device driver + * to pass a packet up the TCP/IP stack. */ + netif_input_fn input; +#if LWIP_IPV4 + /** This function is called by the IP module when it wants + * to send a packet on the interface. This function typically + * first resolves the hardware address, then sends the packet. + * For ethernet physical layer, this is usually etharp_output() */ + netif_output_fn output; +#endif /* LWIP_IPV4 */ + /** This function is called by ethernet_output() when it wants + * to send a packet on the interface. This function outputs + * the pbuf as-is on the link medium. */ + netif_linkoutput_fn linkoutput; +#if LWIP_IPV6 + /** This function is called by the IPv6 module when it wants + * to send a packet on the interface. This function typically + * first resolves the hardware address, then sends the packet. + * For ethernet physical layer, this is usually ethip6_output() */ + netif_output_ip6_fn output_ip6; +#endif /* LWIP_IPV6 */ +#if LWIP_NETIF_STATUS_CALLBACK + /** This function is called when the netif state is set to up or down + */ + netif_status_callback_fn status_callback; +#endif /* LWIP_NETIF_STATUS_CALLBACK */ +#if LWIP_NETIF_LINK_CALLBACK + /** This function is called when the netif link is set to up or down + */ + netif_status_callback_fn link_callback; +#endif /* LWIP_NETIF_LINK_CALLBACK */ +#if LWIP_NETIF_REMOVE_CALLBACK + /** This function is called when the netif has been removed */ + netif_status_callback_fn remove_callback; +#endif /* LWIP_NETIF_REMOVE_CALLBACK */ + /** This field can be set by the device driver and could point + * to state information for the device. */ + void *state; +#ifdef netif_get_client_data + void* client_data[LWIP_NETIF_CLIENT_DATA_INDEX_MAX + LWIP_NUM_NETIF_CLIENT_DATA]; +#endif +#if LWIP_NETIF_HOSTNAME + /* the hostname for this netif, NULL is a valid value */ + const char* hostname; +#endif /* LWIP_NETIF_HOSTNAME */ +#if LWIP_CHECKSUM_CTRL_PER_NETIF + u16_t chksum_flags; +#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF*/ + /** maximum transfer unit (in bytes) */ + u16_t mtu; +#if LWIP_IPV6 && LWIP_ND6_ALLOW_RA_UPDATES + /** maximum transfer unit (in bytes), updated by RA */ + u16_t mtu6; +#endif /* LWIP_IPV6 && LWIP_ND6_ALLOW_RA_UPDATES */ + /** link level hardware address of this interface */ + u8_t hwaddr[NETIF_MAX_HWADDR_LEN]; + /** number of bytes used in hwaddr */ + u8_t hwaddr_len; + /** flags (@see @ref netif_flags) */ + u8_t flags; + /** descriptive abbreviation */ + char name[2]; + /** number of this interface. Used for @ref if_api and @ref netifapi_netif, + * as well as for IPv6 zones */ + u8_t num; +#if LWIP_IPV6_AUTOCONFIG + /** is this netif enabled for IPv6 autoconfiguration */ + u8_t ip6_autoconfig_enabled; +#endif /* LWIP_IPV6_AUTOCONFIG */ +#if LWIP_IPV6_SEND_ROUTER_SOLICIT + /** Number of Router Solicitation messages that remain to be sent. */ + u8_t rs_count; +#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */ +#if MIB2_STATS + /** link type (from "snmp_ifType" enum from snmp_mib2.h) */ + u8_t link_type; + /** (estimate) link speed */ + u32_t link_speed; + /** timestamp at last change made (up/down) */ + u32_t ts; + /** counters */ + struct stats_mib2_netif_ctrs mib2_counters; +#endif /* MIB2_STATS */ +#if LWIP_IPV4 && LWIP_IGMP + /** This function could be called to add or delete an entry in the multicast + filter table of the ethernet MAC.*/ + netif_igmp_mac_filter_fn igmp_mac_filter; +#endif /* LWIP_IPV4 && LWIP_IGMP */ +#if LWIP_IPV6 && LWIP_IPV6_MLD + /** This function could be called to add or delete an entry in the IPv6 multicast + filter table of the ethernet MAC. */ + netif_mld_mac_filter_fn mld_mac_filter; +#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ +#if LWIP_ACD + struct acd *acd_list; +#endif /* LWIP_ACD */ +#if LWIP_NETIF_USE_HINTS + struct netif_hint *hints; +#endif /* LWIP_NETIF_USE_HINTS */ +#if ENABLE_LOOPBACK + /* List of packets to be queued for ourselves. */ + struct pbuf *loop_first; + struct pbuf *loop_last; +#if LWIP_LOOPBACK_MAX_PBUFS + u16_t loop_cnt_current; +#endif /* LWIP_LOOPBACK_MAX_PBUFS */ +#if LWIP_NETIF_LOOPBACK_MULTITHREADING + /* Used if the original scheduling failed. */ + u8_t reschedule_poll; +#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */ +#endif /* ENABLE_LOOPBACK */ +}; + +#if LWIP_CHECKSUM_CTRL_PER_NETIF +#define NETIF_SET_CHECKSUM_CTRL(netif, chksumflags) do { \ + (netif)->chksum_flags = chksumflags; } while(0) +#define NETIF_CHECKSUM_ENABLED(netif, chksumflag) (((netif) == NULL) || (((netif)->chksum_flags & (chksumflag)) != 0)) +#define IF__NETIF_CHECKSUM_ENABLED(netif, chksumflag) if NETIF_CHECKSUM_ENABLED(netif, chksumflag) +#else /* LWIP_CHECKSUM_CTRL_PER_NETIF */ +#define NETIF_CHECKSUM_ENABLED(netif, chksumflag) 0 +#define NETIF_SET_CHECKSUM_CTRL(netif, chksumflags) +#define IF__NETIF_CHECKSUM_ENABLED(netif, chksumflag) +#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */ + +#if LWIP_SINGLE_NETIF +#define NETIF_FOREACH(netif) if (((netif) = netif_default) != NULL) +#else /* LWIP_SINGLE_NETIF */ +/** The list of network interfaces. */ +extern struct netif *netif_list; +#define NETIF_FOREACH(netif) for ((netif) = netif_list; (netif) != NULL; (netif) = (netif)->next) +#endif /* LWIP_SINGLE_NETIF */ +/** The default network interface. */ +extern struct netif *netif_default; + +void netif_init(void); + +struct netif *netif_add_noaddr(struct netif *netif, void *state, netif_init_fn init, netif_input_fn input); + +#if LWIP_IPV4 +struct netif *netif_add(struct netif *netif, + const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw, + void *state, netif_init_fn init, netif_input_fn input); +void netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, + const ip4_addr_t *gw); +#else /* LWIP_IPV4 */ +struct netif *netif_add(struct netif *netif, void *state, netif_init_fn init, netif_input_fn input); +#endif /* LWIP_IPV4 */ +void netif_remove(struct netif * netif); + +/* Returns a network interface given its name. The name is of the form + "et0", where the first two letters are the "name" field in the + netif structure, and the digit is in the num field in the same + structure. */ +struct netif *netif_find(const char *name); + +void netif_set_default(struct netif *netif); + +#if LWIP_IPV4 +void netif_set_ipaddr(struct netif *netif, const ip4_addr_t *ipaddr); +void netif_set_netmask(struct netif *netif, const ip4_addr_t *netmask); +void netif_set_gw(struct netif *netif, const ip4_addr_t *gw); +/** @ingroup netif_ip4 */ +#define netif_ip4_addr(netif) ((const ip4_addr_t*)ip_2_ip4(&((netif)->ip_addr))) +/** @ingroup netif_ip4 */ +#define netif_ip4_netmask(netif) ((const ip4_addr_t*)ip_2_ip4(&((netif)->netmask))) +/** @ingroup netif_ip4 */ +#define netif_ip4_gw(netif) ((const ip4_addr_t*)ip_2_ip4(&((netif)->gw))) +/** @ingroup netif_ip4 */ +#define netif_ip_addr4(netif) ((const ip_addr_t*)&((netif)->ip_addr)) +/** @ingroup netif_ip4 */ +#define netif_ip_netmask4(netif) ((const ip_addr_t*)&((netif)->netmask)) +/** @ingroup netif_ip4 */ +#define netif_ip_gw4(netif) ((const ip_addr_t*)&((netif)->gw)) +#endif /* LWIP_IPV4 */ + +#define netif_set_flags(netif, set_flags) do { (netif)->flags = (u8_t)((netif)->flags | (set_flags)); } while(0) +#define netif_clear_flags(netif, clr_flags) do { (netif)->flags = (u8_t)((netif)->flags & (u8_t)(~(clr_flags) & 0xff)); } while(0) +#define netif_is_flag_set(netif, flag) (((netif)->flags & (flag)) != 0) + +void netif_set_up(struct netif *netif); +void netif_set_down(struct netif *netif); +/** @ingroup netif + * Ask if an interface is up + */ +#define netif_is_up(netif) (((netif)->flags & NETIF_FLAG_UP) ? (u8_t)1 : (u8_t)0) + +#if LWIP_NETIF_STATUS_CALLBACK +void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback); +#endif /* LWIP_NETIF_STATUS_CALLBACK */ +#if LWIP_NETIF_REMOVE_CALLBACK +void netif_set_remove_callback(struct netif *netif, netif_status_callback_fn remove_callback); +#endif /* LWIP_NETIF_REMOVE_CALLBACK */ + +void netif_set_link_up(struct netif *netif); +void netif_set_link_down(struct netif *netif); +/** Ask if a link is up */ +#define netif_is_link_up(netif) (((netif)->flags & NETIF_FLAG_LINK_UP) ? (u8_t)1 : (u8_t)0) + +#if LWIP_NETIF_LINK_CALLBACK +void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback); +#endif /* LWIP_NETIF_LINK_CALLBACK */ + +#if LWIP_NETIF_HOSTNAME +/** @ingroup netif */ +#define netif_set_hostname(netif, name) do { if((netif) != NULL) { (netif)->hostname = name; }}while(0) +/** @ingroup netif */ +#define netif_get_hostname(netif) (((netif) != NULL) ? ((netif)->hostname) : NULL) +#endif /* LWIP_NETIF_HOSTNAME */ + +#if LWIP_IGMP +/** @ingroup netif + * Set igmp mac filter function for a netif. */ +#define netif_set_igmp_mac_filter(netif, function) do { if((netif) != NULL) { (netif)->igmp_mac_filter = function; }}while(0) +/** Get the igmp mac filter function for a netif. */ +#define netif_get_igmp_mac_filter(netif) (((netif) != NULL) ? ((netif)->igmp_mac_filter) : NULL) +#endif /* LWIP_IGMP */ + +#if LWIP_IPV6 && LWIP_IPV6_MLD +/** @ingroup netif + * Set mld mac filter function for a netif. */ +#define netif_set_mld_mac_filter(netif, function) do { if((netif) != NULL) { (netif)->mld_mac_filter = function; }}while(0) +/** Get the mld mac filter function for a netif. */ +#define netif_get_mld_mac_filter(netif) (((netif) != NULL) ? ((netif)->mld_mac_filter) : NULL) +#define netif_mld_mac_filter(netif, addr, action) do { if((netif) && (netif)->mld_mac_filter) { (netif)->mld_mac_filter((netif), (addr), (action)); }}while(0) +#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ + +#if ENABLE_LOOPBACK +err_t netif_loop_output(struct netif *netif, struct pbuf *p); +void netif_poll(struct netif *netif); +#if !LWIP_NETIF_LOOPBACK_MULTITHREADING +void netif_poll_all(void); +#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */ +#endif /* ENABLE_LOOPBACK */ + +err_t netif_input(struct pbuf *p, struct netif *inp); + +#if LWIP_IPV6 +/** @ingroup netif_ip6 */ +#define netif_ip_addr6(netif, i) ((const ip_addr_t*)(&((netif)->ip6_addr[i]))) +/** @ingroup netif_ip6 */ +#define netif_ip6_addr(netif, i) ((const ip6_addr_t*)ip_2_ip6(&((netif)->ip6_addr[i]))) +void netif_ip6_addr_set(struct netif *netif, s8_t addr_idx, const ip6_addr_t *addr6); +void netif_ip6_addr_set_parts(struct netif *netif, s8_t addr_idx, u32_t i0, u32_t i1, u32_t i2, u32_t i3); +#define netif_ip6_addr_state(netif, i) ((netif)->ip6_addr_state[i]) +void netif_ip6_addr_set_state(struct netif* netif, s8_t addr_idx, u8_t state); +s8_t netif_get_ip6_addr_match(struct netif *netif, const ip6_addr_t *ip6addr); +void netif_create_ip6_linklocal_address(struct netif *netif, u8_t from_mac_48bit); +err_t netif_add_ip6_address(struct netif *netif, const ip6_addr_t *ip6addr, s8_t *chosen_idx); +#define netif_set_ip6_autoconfig_enabled(netif, action) do { if(netif) { (netif)->ip6_autoconfig_enabled = (action); }}while(0) +#if LWIP_IPV6_ADDRESS_LIFETIMES +#define netif_ip6_addr_valid_life(netif, i) \ + (((netif) != NULL) ? ((netif)->ip6_addr_valid_life[i]) : IP6_ADDR_LIFE_STATIC) +#define netif_ip6_addr_set_valid_life(netif, i, secs) \ + do { if (netif != NULL) { (netif)->ip6_addr_valid_life[i] = (secs); }} while (0) +#define netif_ip6_addr_pref_life(netif, i) \ + (((netif) != NULL) ? ((netif)->ip6_addr_pref_life[i]) : IP6_ADDR_LIFE_STATIC) +#define netif_ip6_addr_set_pref_life(netif, i, secs) \ + do { if (netif != NULL) { (netif)->ip6_addr_pref_life[i] = (secs); }} while (0) +#define netif_ip6_addr_isstatic(netif, i) \ + (netif_ip6_addr_valid_life((netif), (i)) == IP6_ADDR_LIFE_STATIC) +#else /* !LWIP_IPV6_ADDRESS_LIFETIMES */ +#define netif_ip6_addr_isstatic(netif, i) (1) /* all addresses are static */ +#endif /* !LWIP_IPV6_ADDRESS_LIFETIMES */ +#if LWIP_ND6_ALLOW_RA_UPDATES +#define netif_mtu6(netif) ((netif)->mtu6) +#else /* LWIP_ND6_ALLOW_RA_UPDATES */ +#define netif_mtu6(netif) ((netif)->mtu) +#endif /* LWIP_ND6_ALLOW_RA_UPDATES */ +#endif /* LWIP_IPV6 */ + +#if LWIP_NETIF_USE_HINTS +#define NETIF_SET_HINTS(netif, netifhint) (netif)->hints = (netifhint) +#define NETIF_RESET_HINTS(netif) (netif)->hints = NULL +#else /* LWIP_NETIF_USE_HINTS */ +#define NETIF_SET_HINTS(netif, netifhint) +#define NETIF_RESET_HINTS(netif) +#endif /* LWIP_NETIF_USE_HINTS */ + +u8_t netif_name_to_index(const char *name); +char * netif_index_to_name(u8_t idx, char *name); +struct netif* netif_get_by_index(u8_t idx); + +/* Interface indexes always start at 1 per RFC 3493, section 4, num starts at 0 (internal index is 0..254)*/ +#define netif_get_index(netif) ((u8_t)((netif)->num + 1)) +#define NETIF_NO_INDEX (0) + +/** + * @ingroup netif + * Extended netif status callback (NSC) reasons flags. + * May be extended in the future! + */ +typedef u16_t netif_nsc_reason_t; + +/* used for initialization only */ +#define LWIP_NSC_NONE 0x0000 +/** netif was added. arg: NULL. Called AFTER netif was added. */ +#define LWIP_NSC_NETIF_ADDED 0x0001 +/** netif was removed. arg: NULL. Called BEFORE netif is removed. */ +#define LWIP_NSC_NETIF_REMOVED 0x0002 +/** link changed */ +#define LWIP_NSC_LINK_CHANGED 0x0004 +/** netif administrative status changed.<br> + * up is called AFTER netif is set up.<br> + * down is called BEFORE the netif is actually set down. */ +#define LWIP_NSC_STATUS_CHANGED 0x0008 +/** IPv4 address has changed */ +#define LWIP_NSC_IPV4_ADDRESS_CHANGED 0x0010 +/** IPv4 gateway has changed */ +#define LWIP_NSC_IPV4_GATEWAY_CHANGED 0x0020 +/** IPv4 netmask has changed */ +#define LWIP_NSC_IPV4_NETMASK_CHANGED 0x0040 +/** called AFTER IPv4 address/gateway/netmask changes have been applied */ +#define LWIP_NSC_IPV4_SETTINGS_CHANGED 0x0080 +/** IPv6 address was added */ +#define LWIP_NSC_IPV6_SET 0x0100 +/** IPv6 address state has changed */ +#define LWIP_NSC_IPV6_ADDR_STATE_CHANGED 0x0200 +/** IPv4 settings: valid address set, application may start to communicate */ +#define LWIP_NSC_IPV4_ADDR_VALID 0x0400 + +/** @ingroup netif + * Argument supplied to netif_ext_callback_fn. + */ +typedef union +{ + /** Args to LWIP_NSC_LINK_CHANGED callback */ + struct link_changed_s + { + /** 1: up; 0: down */ + u8_t state; + } link_changed; + /** Args to LWIP_NSC_STATUS_CHANGED callback */ + struct status_changed_s + { + /** 1: up; 0: down */ + u8_t state; + } status_changed; + /** Args to LWIP_NSC_IPV4_ADDRESS_CHANGED|LWIP_NSC_IPV4_GATEWAY_CHANGED|LWIP_NSC_IPV4_NETMASK_CHANGED|LWIP_NSC_IPV4_SETTINGS_CHANGED callback */ + struct ipv4_changed_s + { + /** Old IPv4 address */ + const ip_addr_t* old_address; + const ip_addr_t* old_netmask; + const ip_addr_t* old_gw; + } ipv4_changed; + /** Args to LWIP_NSC_IPV6_SET callback */ + struct ipv6_set_s + { + /** Index of changed IPv6 address */ + s8_t addr_index; + /** Old IPv6 address */ + const ip_addr_t* old_address; + } ipv6_set; + /** Args to LWIP_NSC_IPV6_ADDR_STATE_CHANGED callback */ + struct ipv6_addr_state_changed_s + { + /** Index of affected IPv6 address */ + s8_t addr_index; + /** Old IPv6 address state */ + u8_t old_state; + /** Affected IPv6 address */ + const ip_addr_t* address; + } ipv6_addr_state_changed; +} netif_ext_callback_args_t; + +/** + * @ingroup netif + * Function used for extended netif status callbacks + * Note: When parsing reason argument, keep in mind that more reasons may be added in the future! + * @param netif netif that is affected by change + * @param reason change reason + * @param args depends on reason, see reason description + */ +typedef void (*netif_ext_callback_fn)(struct netif* netif, netif_nsc_reason_t reason, const netif_ext_callback_args_t* args); + +#if LWIP_NETIF_EXT_STATUS_CALLBACK +struct netif_ext_callback; +typedef struct netif_ext_callback +{ + netif_ext_callback_fn callback_fn; + struct netif_ext_callback* next; +} netif_ext_callback_t; + +#define NETIF_DECLARE_EXT_CALLBACK(name) static netif_ext_callback_t name; +void netif_add_ext_callback(netif_ext_callback_t* callback, netif_ext_callback_fn fn); +void netif_remove_ext_callback(netif_ext_callback_t* callback); +void netif_invoke_ext_callback(struct netif* netif, netif_nsc_reason_t reason, const netif_ext_callback_args_t* args); +#else +#define NETIF_DECLARE_EXT_CALLBACK(name) +#define netif_add_ext_callback(callback, fn) +#define netif_remove_ext_callback(callback) +#define netif_invoke_ext_callback(netif, reason, args) +#endif + +#if LWIP_TESTMODE && LWIP_HAVE_LOOPIF +struct netif* netif_get_loopif(void); +#endif + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_NETIF_H */ diff --git a/lib/lwip/include/lwip/netifapi.h b/lib/lwip/include/lwip/netifapi.h new file mode 100644 index 0000000000..e0631791b9 --- /dev/null +++ b/lib/lwip/include/lwip/netifapi.h @@ -0,0 +1,161 @@ +/** + * @file + * netif API (to be used from non-TCPIP threads) + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ +#ifndef LWIP_HDR_NETIFAPI_H +#define LWIP_HDR_NETIFAPI_H + +#include "lwip/opt.h" + +#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/sys.h" +#include "lwip/netif.h" +#include "lwip/dhcp.h" +#include "lwip/autoip.h" +#include "lwip/priv/tcpip_priv.h" +#include "lwip/priv/api_msg.h" +#include "lwip/prot/ethernet.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* API for application */ +#if LWIP_ARP && LWIP_IPV4 +/* Used for netfiapi_arp_* APIs */ +enum netifapi_arp_entry { + NETIFAPI_ARP_PERM /* Permanent entry */ + /* Other entry types can be added here */ +}; + +/** @ingroup netifapi_arp */ +err_t netifapi_arp_add(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr, enum netifapi_arp_entry type); +/** @ingroup netifapi_arp */ +err_t netifapi_arp_remove(const ip4_addr_t *ipaddr, enum netifapi_arp_entry type); +#endif /* LWIP_ARP && LWIP_IPV4 */ + +err_t netifapi_netif_add(struct netif *netif, +#if LWIP_IPV4 + const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw, +#endif /* LWIP_IPV4 */ + void *state, netif_init_fn init, netif_input_fn input); + +#if LWIP_IPV4 +err_t netifapi_netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr, + const ip4_addr_t *netmask, const ip4_addr_t *gw); +#endif /* LWIP_IPV4*/ + +err_t netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc, + netifapi_errt_fn errtfunc); + +/** @ingroup netifapi_netif */ +err_t netifapi_netif_name_to_index(const char *name, u8_t *index); +/** @ingroup netifapi_netif */ +err_t netifapi_netif_index_to_name(u8_t index, char *name); + +/** @ingroup netifapi_netif + * @see netif_remove() + */ +#define netifapi_netif_remove(n) netifapi_netif_common(n, netif_remove, NULL) +/** @ingroup netifapi_netif + * @see netif_set_up() + */ +#define netifapi_netif_set_up(n) netifapi_netif_common(n, netif_set_up, NULL) +/** @ingroup netifapi_netif + * @see netif_set_down() + */ +#define netifapi_netif_set_down(n) netifapi_netif_common(n, netif_set_down, NULL) +/** @ingroup netifapi_netif + * @see netif_set_default() + */ +#define netifapi_netif_set_default(n) netifapi_netif_common(n, netif_set_default, NULL) +/** @ingroup netifapi_netif + * @see netif_set_link_up() + */ +#define netifapi_netif_set_link_up(n) netifapi_netif_common(n, netif_set_link_up, NULL) +/** @ingroup netifapi_netif + * @see netif_set_link_down() + */ +#define netifapi_netif_set_link_down(n) netifapi_netif_common(n, netif_set_link_down, NULL) + +/** + * @defgroup netifapi_dhcp4 DHCPv4 + * @ingroup netifapi + * To be called from non-TCPIP threads + */ +/** @ingroup netifapi_dhcp4 + * @see dhcp_start() + */ +#define netifapi_dhcp_start(n) netifapi_netif_common(n, NULL, dhcp_start) +/** + * @ingroup netifapi_dhcp4 + * @deprecated Use netifapi_dhcp_release_and_stop() instead. + */ +#define netifapi_dhcp_stop(n) netifapi_netif_common(n, dhcp_stop, NULL) +/** @ingroup netifapi_dhcp4 + * @see dhcp_inform() + */ +#define netifapi_dhcp_inform(n) netifapi_netif_common(n, dhcp_inform, NULL) +/** @ingroup netifapi_dhcp4 + * @see dhcp_renew() + */ +#define netifapi_dhcp_renew(n) netifapi_netif_common(n, NULL, dhcp_renew) +/** + * @ingroup netifapi_dhcp4 + * @deprecated Use netifapi_dhcp_release_and_stop() instead. + */ +#define netifapi_dhcp_release(n) netifapi_netif_common(n, NULL, dhcp_release) +/** @ingroup netifapi_dhcp4 + * @see dhcp_release_and_stop() + */ +#define netifapi_dhcp_release_and_stop(n) netifapi_netif_common(n, dhcp_release_and_stop, NULL) + +/** + * @defgroup netifapi_autoip AUTOIP + * @ingroup netifapi + * To be called from non-TCPIP threads + */ +/** @ingroup netifapi_autoip + * @see autoip_start() + */ +#define netifapi_autoip_start(n) netifapi_netif_common(n, NULL, autoip_start) +/** @ingroup netifapi_autoip + * @see autoip_stop() + */ +#define netifapi_autoip_stop(n) netifapi_netif_common(n, NULL, autoip_stop) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_NETIF_API */ + +#endif /* LWIP_HDR_NETIFAPI_H */ diff --git a/lib/lwip/include/lwip/opt.h b/lib/lwip/include/lwip/opt.h new file mode 100644 index 0000000000..c27dd0349d --- /dev/null +++ b/lib/lwip/include/lwip/opt.h @@ -0,0 +1,3595 @@ +/** + * @file + * + * lwIP Options Configuration + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +/* + * NOTE: || defined __DOXYGEN__ is a workaround for doxygen bug - + * without this, doxygen does not see the actual #define + */ + +#if !defined LWIP_HDR_OPT_H +#define LWIP_HDR_OPT_H + +/* + * Include user defined options first. Anything not defined in these files + * will be set to standard values. Override anything you don't like! + */ +#include "lwipopts.h" +#include "lwip/debug.h" + +/** + * @defgroup lwip_opts Options (lwipopts.h) + * @ingroup lwip + * + * @defgroup lwip_opts_debug Debugging + * @ingroup lwip_opts + * + * @defgroup lwip_opts_infrastructure Infrastructure + * @ingroup lwip_opts + * + * @defgroup lwip_opts_callback Callback-style APIs + * @ingroup lwip_opts + * + * @defgroup lwip_opts_threadsafe_apis Thread-safe APIs + * @ingroup lwip_opts + */ + + /* + ------------------------------------ + -------------- NO SYS -------------- + ------------------------------------ +*/ +/** + * @defgroup lwip_opts_nosys NO_SYS + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * NO_SYS==1: Use lwIP without OS-awareness (no thread, semaphores, mutexes or + * mboxes). This means threaded APIs cannot be used (socket, netconn, + * i.e. everything in the 'api' folder), only the callback-style raw API is + * available (and you have to watch out for yourself that you don't access + * lwIP functions/structures from more than one context at a time!) + */ +#if !defined NO_SYS || defined __DOXYGEN__ +#define NO_SYS 0 +#endif +/** + * @} + */ + +/** + * @defgroup lwip_opts_timers Timers + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * LWIP_TIMERS==0: Drop support for sys_timeout and lwip-internal cyclic timers. + * (the array of lwip-internal cyclic timers is still provided) + * (check NO_SYS_NO_TIMERS for compatibility to old versions) + */ +#if !defined LWIP_TIMERS || defined __DOXYGEN__ +#ifdef NO_SYS_NO_TIMERS +#define LWIP_TIMERS (!NO_SYS || (NO_SYS && !NO_SYS_NO_TIMERS)) +#else +#define LWIP_TIMERS 1 +#endif +#endif + +/** + * LWIP_TIMERS_CUSTOM==1: Provide your own timer implementation. + * Function prototypes in timeouts.h and the array of lwip-internal cyclic timers + * are still included, but the implementation is not. The following functions + * will be required: sys_timeouts_init(), sys_timeout(), sys_untimeout(), + * sys_timeouts_mbox_fetch() + */ +#if !defined LWIP_TIMERS_CUSTOM || defined __DOXYGEN__ +#define LWIP_TIMERS_CUSTOM 0 +#endif +/** + * @} + */ + +/** + * @defgroup lwip_opts_memcpy memcpy + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * MEMCPY: override this if you have a faster implementation at hand than the + * one included in your C library + */ +#if !defined MEMCPY || defined __DOXYGEN__ +#define MEMCPY(dst,src,len) memcpy(dst,src,len) +#endif + +/** + * SMEMCPY: override this with care! Some compilers (e.g. gcc) can inline a + * call to memcpy() if the length is known at compile time and is small. + */ +#if !defined SMEMCPY || defined __DOXYGEN__ +#define SMEMCPY(dst,src,len) memcpy(dst,src,len) +#endif + +/** + * MEMMOVE: override this if you have a faster implementation at hand than the + * one included in your C library. lwIP currently uses MEMMOVE only when IPv6 + * fragmentation support is enabled. + */ +#if !defined MEMMOVE || defined __DOXYGEN__ +#define MEMMOVE(dst,src,len) memmove(dst,src,len) +#endif +/** + * @} + */ + +/* + ------------------------------------ + ----------- Core locking ----------- + ------------------------------------ +*/ +/** + * @defgroup lwip_opts_lock Core locking and MPU + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * LWIP_MPU_COMPATIBLE: enables special memory management mechanism + * which makes lwip able to work on MPU (Memory Protection Unit) system + * by not passing stack-pointers to other threads + * (this decreases performance as memory is allocated from pools instead + * of keeping it on the stack) + */ +#if !defined LWIP_MPU_COMPATIBLE || defined __DOXYGEN__ +#define LWIP_MPU_COMPATIBLE 0 +#endif + +/** + * LWIP_TCPIP_CORE_LOCKING + * Creates a global mutex that is held during TCPIP thread operations. + * Can be locked by client code to perform lwIP operations without changing + * into TCPIP thread using callbacks. See LOCK_TCPIP_CORE() and + * UNLOCK_TCPIP_CORE(). + * Your system should provide mutexes supporting priority inversion to use this. + */ +#if !defined LWIP_TCPIP_CORE_LOCKING || defined __DOXYGEN__ +#define LWIP_TCPIP_CORE_LOCKING 1 +#endif + +/** + * LWIP_TCPIP_CORE_LOCKING_INPUT: when LWIP_TCPIP_CORE_LOCKING is enabled, + * this lets tcpip_input() grab the mutex for input packets as well, + * instead of allocating a message and passing it to tcpip_thread. + * + * ATTENTION: this does not work when tcpip_input() is called from + * interrupt context! + */ +#if !defined LWIP_TCPIP_CORE_LOCKING_INPUT || defined __DOXYGEN__ +#define LWIP_TCPIP_CORE_LOCKING_INPUT 0 +#endif + +/** + * SYS_LIGHTWEIGHT_PROT==1: enable inter-task protection (and task-vs-interrupt + * protection) for certain critical regions during buffer allocation, deallocation + * and memory allocation and deallocation. + * ATTENTION: This is required when using lwIP from more than one context! If + * you disable this, you must be sure what you are doing! + */ +#if !defined SYS_LIGHTWEIGHT_PROT || defined __DOXYGEN__ +#define SYS_LIGHTWEIGHT_PROT 1 +#endif + +/** + * Macro/function to check whether lwIP's threading/locking + * requirements are satisfied during current function call. + * This macro usually calls a function that is implemented in the OS-dependent + * sys layer and performs the following checks: + * - Not in ISR (this should be checked for NO_SYS==1, too!) + * - If @ref LWIP_TCPIP_CORE_LOCKING = 1: TCPIP core lock is held + * - If @ref LWIP_TCPIP_CORE_LOCKING = 0: function is called from TCPIP thread + * @see @ref multithreading + */ +#if !defined LWIP_ASSERT_CORE_LOCKED || defined __DOXYGEN__ +#define LWIP_ASSERT_CORE_LOCKED() +#endif + + +/** + * @} + */ + +/* + ------------------------------------ + ---------- Memory options ---------- + ------------------------------------ +*/ +/** + * @defgroup lwip_opts_mem Heap and memory pools + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * MEM_LIBC_MALLOC==1: Use malloc/free/realloc provided by your C-library + * instead of the lwip internal allocator. Can save code size if you + * already use it. + */ +#if !defined MEM_LIBC_MALLOC || defined __DOXYGEN__ +#define MEM_LIBC_MALLOC 0 +#endif + +/** + * MEMP_MEM_MALLOC==1: Use mem_malloc/mem_free instead of the lwip pool allocator. + * Especially useful with MEM_LIBC_MALLOC but handle with care regarding execution + * speed (heap alloc can be much slower than pool alloc) and usage from interrupts + * (especially if your netif driver allocates PBUF_POOL pbufs for received frames + * from interrupt)! + * ATTENTION: Currently, this uses the heap for ALL pools (also for private pools, + * not only for internal pools defined in memp_std.h)! + */ +#if !defined MEMP_MEM_MALLOC || defined __DOXYGEN__ +#define MEMP_MEM_MALLOC 0 +#endif + +/** + * MEMP_MEM_INIT==1: Force use of memset to initialize pool memory. + * Useful if pool are moved in uninitialized section of memory. This will ensure + * default values in pcbs struct are well initialized in all conditions. + */ +#if !defined MEMP_MEM_INIT || defined __DOXYGEN__ +#define MEMP_MEM_INIT 0 +#endif + +/** + * MEM_ALIGNMENT: should be set to the alignment of the CPU + * 4 byte alignment -> #define MEM_ALIGNMENT 4 + * 2 byte alignment -> #define MEM_ALIGNMENT 2 + */ +#if !defined MEM_ALIGNMENT || defined __DOXYGEN__ +#define MEM_ALIGNMENT 1 +#endif + +/** + * MEM_SIZE: the size of the heap memory. If the application will send + * a lot of data that needs to be copied, this should be set high. + */ +#if !defined MEM_SIZE || defined __DOXYGEN__ +#define MEM_SIZE 1600 +#endif + +/** + * MEMP_OVERFLOW_CHECK: memp overflow protection reserves a configurable + * amount of bytes before and after each memp element in every pool and fills + * it with a prominent default value. + * MEMP_OVERFLOW_CHECK == 0 no checking + * MEMP_OVERFLOW_CHECK == 1 checks each element when it is freed + * MEMP_OVERFLOW_CHECK >= 2 checks each element in every pool every time + * memp_malloc() or memp_free() is called (useful but slow!) + */ +#if !defined MEMP_OVERFLOW_CHECK || defined __DOXYGEN__ +#define MEMP_OVERFLOW_CHECK 0 +#endif + +/** + * MEMP_SANITY_CHECK==1: run a sanity check after each memp_free() to make + * sure that there are no cycles in the linked lists. + */ +#if !defined MEMP_SANITY_CHECK || defined __DOXYGEN__ +#define MEMP_SANITY_CHECK 0 +#endif + +/** + * MEM_OVERFLOW_CHECK: mem overflow protection reserves a configurable + * amount of bytes before and after each heap allocation chunk and fills + * it with a prominent default value. + * MEM_OVERFLOW_CHECK == 0 no checking + * MEM_OVERFLOW_CHECK == 1 checks each element when it is freed + * MEM_OVERFLOW_CHECK >= 2 checks all heap elements every time + * mem_malloc() or mem_free() is called (useful but slow!) + */ +#if !defined MEM_OVERFLOW_CHECK || defined __DOXYGEN__ +#define MEM_OVERFLOW_CHECK 0 +#endif + +/** + * MEM_SANITY_CHECK==1: run a sanity check after each mem_free() to make + * sure that the linked list of heap elements is not corrupted. + */ +#if !defined MEM_SANITY_CHECK || defined __DOXYGEN__ +#define MEM_SANITY_CHECK 0 +#endif + +/** + * MEM_USE_POOLS==1: Use an alternative to malloc() by allocating from a set + * of memory pools of various sizes. When mem_malloc is called, an element of + * the smallest pool that can provide the length needed is returned. + * To use this, MEMP_USE_CUSTOM_POOLS also has to be enabled. + */ +#if !defined MEM_USE_POOLS || defined __DOXYGEN__ +#define MEM_USE_POOLS 0 +#endif + +/** + * MEM_USE_POOLS_TRY_BIGGER_POOL==1: if one malloc-pool is empty, try the next + * bigger pool - WARNING: THIS MIGHT WASTE MEMORY but it can make a system more + * reliable. */ +#if !defined MEM_USE_POOLS_TRY_BIGGER_POOL || defined __DOXYGEN__ +#define MEM_USE_POOLS_TRY_BIGGER_POOL 0 +#endif + +/** + * MEMP_USE_CUSTOM_POOLS==1: whether to include a user file lwippools.h + * that defines additional pools beyond the "standard" ones required + * by lwIP. If you set this to 1, you must have lwippools.h in your + * include path somewhere. + */ +#if !defined MEMP_USE_CUSTOM_POOLS || defined __DOXYGEN__ +#define MEMP_USE_CUSTOM_POOLS 0 +#endif + +/** + * Set this to 1 if you want to free PBUF_RAM pbufs (or call mem_free()) from + * interrupt context (or another context that doesn't allow waiting for a + * semaphore). + * If set to 1, mem_malloc will be protected by a semaphore and SYS_ARCH_PROTECT, + * while mem_free will only use SYS_ARCH_PROTECT. mem_malloc SYS_ARCH_UNPROTECTs + * with each loop so that mem_free can run. + * + * ATTENTION: As you can see from the above description, this leads to dis-/ + * enabling interrupts often, which can be slow! Also, on low memory, mem_malloc + * can need longer. + * + * If you don't want that, at least for NO_SYS=0, you can still use the following + * functions to enqueue a deallocation call which then runs in the tcpip_thread + * context: + * - pbuf_free_callback(p); + * - mem_free_callback(m); + */ +#if !defined LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT || defined __DOXYGEN__ +#define LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT 0 +#endif +/** + * @} + */ + +/* + ------------------------------------------------ + ---------- Internal Memory Pool Sizes ---------- + ------------------------------------------------ +*/ +/** + * @defgroup lwip_opts_memp Internal memory pools + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * MEMP_NUM_PBUF: the number of memp struct pbufs (used for PBUF_ROM and PBUF_REF). + * If the application sends a lot of data out of ROM (or other static memory), + * this should be set high. + */ +#if !defined MEMP_NUM_PBUF || defined __DOXYGEN__ +#define MEMP_NUM_PBUF 16 +#endif + +/** + * MEMP_NUM_RAW_PCB: Number of raw connection PCBs + * (requires the LWIP_RAW option) + */ +#if !defined MEMP_NUM_RAW_PCB || defined __DOXYGEN__ +#define MEMP_NUM_RAW_PCB 4 +#endif + +/** + * MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One + * per active UDP "connection". + * (requires the LWIP_UDP option) + */ +#if !defined MEMP_NUM_UDP_PCB || defined __DOXYGEN__ +#define MEMP_NUM_UDP_PCB 4 +#endif + +/** + * MEMP_NUM_TCP_PCB: the number of simultaneously active TCP connections. + * (requires the LWIP_TCP option) + */ +#if !defined MEMP_NUM_TCP_PCB || defined __DOXYGEN__ +#define MEMP_NUM_TCP_PCB 5 +#endif + +/** + * MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections. + * (requires the LWIP_TCP option) + */ +#if !defined MEMP_NUM_TCP_PCB_LISTEN || defined __DOXYGEN__ +#define MEMP_NUM_TCP_PCB_LISTEN 8 +#endif + +/** + * MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments. + * (requires the LWIP_TCP option) + */ +#if !defined MEMP_NUM_TCP_SEG || defined __DOXYGEN__ +#define MEMP_NUM_TCP_SEG 16 +#endif + +/** + * MEMP_NUM_ALTCP_PCB: the number of simultaneously active altcp layer pcbs. + * (requires the LWIP_ALTCP option) + * Connections with multiple layers require more than one altcp_pcb (e.g. TLS + * over TCP requires 2 altcp_pcbs, one for TLS and one for TCP). + */ +#if !defined MEMP_NUM_ALTCP_PCB || defined __DOXYGEN__ +#define MEMP_NUM_ALTCP_PCB MEMP_NUM_TCP_PCB +#endif + +/** + * MEMP_NUM_REASSDATA: the number of IP packets simultaneously queued for + * reassembly (whole packets, not fragments!) + */ +#if !defined MEMP_NUM_REASSDATA || defined __DOXYGEN__ +#define MEMP_NUM_REASSDATA 5 +#endif + +/** + * MEMP_NUM_FRAG_PBUF: the number of IP fragments simultaneously sent + * (fragments, not whole packets!). + * This is only used with LWIP_NETIF_TX_SINGLE_PBUF==0 and only has to be > 1 + * with DMA-enabled MACs where the packet is not yet sent when netif->output + * returns. + */ +#if !defined MEMP_NUM_FRAG_PBUF || defined __DOXYGEN__ +#define MEMP_NUM_FRAG_PBUF 15 +#endif + +/** + * MEMP_NUM_ARP_QUEUE: the number of simultaneously queued outgoing + * packets (pbufs) that are waiting for an ARP request (to resolve + * their destination address) to finish. + * (requires the ARP_QUEUEING option) + */ +#if !defined MEMP_NUM_ARP_QUEUE || defined __DOXYGEN__ +#define MEMP_NUM_ARP_QUEUE 30 +#endif + +/** + * MEMP_NUM_IGMP_GROUP: The number of multicast groups whose network interfaces + * can be members at the same time (one per netif - allsystems group -, plus one + * per netif membership). + * (requires the LWIP_IGMP option) + */ +#if !defined MEMP_NUM_IGMP_GROUP || defined __DOXYGEN__ +#define MEMP_NUM_IGMP_GROUP 8 +#endif + +/** + * The number of sys timeouts used by the core stack (not apps) + * The default number of timeouts is calculated here for all enabled modules. + */ +#define LWIP_NUM_SYS_TIMEOUT_INTERNAL (LWIP_TCP + IP_REASSEMBLY + LWIP_ARP + (2*LWIP_DHCP) + LWIP_ACD + LWIP_IGMP + LWIP_DNS + PPP_NUM_TIMEOUTS + (LWIP_IPV6 * (1 + LWIP_IPV6_REASS + LWIP_IPV6_MLD + LWIP_IPV6_DHCP6))) + +/** + * MEMP_NUM_SYS_TIMEOUT: the number of simultaneously active timeouts. + * The default number of timeouts is calculated here for all enabled modules. + * The formula expects settings to be either '0' or '1'. + */ +#if !defined MEMP_NUM_SYS_TIMEOUT || defined __DOXYGEN__ +#define MEMP_NUM_SYS_TIMEOUT LWIP_NUM_SYS_TIMEOUT_INTERNAL +#endif + +/** + * MEMP_NUM_NETBUF: the number of struct netbufs. + * (only needed if you use the sequential API, like api_lib.c) + */ +#if !defined MEMP_NUM_NETBUF || defined __DOXYGEN__ +#define MEMP_NUM_NETBUF 2 +#endif + +/** + * MEMP_NUM_NETCONN: the number of struct netconns. + * (only needed if you use the sequential API, like api_lib.c) + */ +#if !defined MEMP_NUM_NETCONN || defined __DOXYGEN__ +#define MEMP_NUM_NETCONN 4 +#endif + +/** + * MEMP_NUM_SELECT_CB: the number of struct lwip_select_cb. + * (Only needed if you have LWIP_MPU_COMPATIBLE==1 and use the socket API. + * In that case, you need one per thread calling lwip_select.) + */ +#if !defined MEMP_NUM_SELECT_CB || defined __DOXYGEN__ +#define MEMP_NUM_SELECT_CB 4 +#endif + +/** + * MEMP_NUM_TCPIP_MSG_API: the number of struct tcpip_msg, which are used + * for callback/timeout API communication. + * (only needed if you use tcpip.c) + */ +#if !defined MEMP_NUM_TCPIP_MSG_API || defined __DOXYGEN__ +#define MEMP_NUM_TCPIP_MSG_API 8 +#endif + +/** + * MEMP_NUM_TCPIP_MSG_INPKT: the number of struct tcpip_msg, which are used + * for incoming packets. + * (only needed if you use tcpip.c) + */ +#if !defined MEMP_NUM_TCPIP_MSG_INPKT || defined __DOXYGEN__ +#define MEMP_NUM_TCPIP_MSG_INPKT 8 +#endif + +/** + * MEMP_NUM_NETDB: the number of concurrently running lwip_addrinfo() calls + * (before freeing the corresponding memory using lwip_freeaddrinfo()). + */ +#if !defined MEMP_NUM_NETDB || defined __DOXYGEN__ +#define MEMP_NUM_NETDB 1 +#endif + +/** + * MEMP_NUM_LOCALHOSTLIST: the number of host entries in the local host list + * if DNS_LOCAL_HOSTLIST_IS_DYNAMIC==1. + */ +#if !defined MEMP_NUM_LOCALHOSTLIST || defined __DOXYGEN__ +#define MEMP_NUM_LOCALHOSTLIST 1 +#endif + +/** + * PBUF_POOL_SIZE: the number of buffers in the pbuf pool. + */ +#if !defined PBUF_POOL_SIZE || defined __DOXYGEN__ +#define PBUF_POOL_SIZE 16 +#endif + +/** MEMP_NUM_API_MSG: the number of concurrently active calls to various + * socket, netconn, and tcpip functions + */ +#if !defined MEMP_NUM_API_MSG || defined __DOXYGEN__ +#define MEMP_NUM_API_MSG MEMP_NUM_TCPIP_MSG_API +#endif + +/** MEMP_NUM_DNS_API_MSG: the number of concurrently active calls to netconn_gethostbyname + */ +#if !defined MEMP_NUM_DNS_API_MSG || defined __DOXYGEN__ +#define MEMP_NUM_DNS_API_MSG MEMP_NUM_TCPIP_MSG_API +#endif + +/** MEMP_NUM_SOCKET_SETGETSOCKOPT_DATA: the number of concurrently active calls + * to getsockopt/setsockopt + */ +#if !defined MEMP_NUM_SOCKET_SETGETSOCKOPT_DATA || defined __DOXYGEN__ +#define MEMP_NUM_SOCKET_SETGETSOCKOPT_DATA MEMP_NUM_TCPIP_MSG_API +#endif + +/** MEMP_NUM_NETIFAPI_MSG: the number of concurrently active calls to the + * netifapi functions + */ +#if !defined MEMP_NUM_NETIFAPI_MSG || defined __DOXYGEN__ +#define MEMP_NUM_NETIFAPI_MSG MEMP_NUM_TCPIP_MSG_API +#endif +/** + * @} + */ + +/* + --------------------------------- + ---------- ARP options ---------- + --------------------------------- +*/ +/** + * @defgroup lwip_opts_arp ARP + * @ingroup lwip_opts_ipv4 + * @{ + */ +/** + * LWIP_ARP==1: Enable ARP functionality. + */ +#if !defined LWIP_ARP || defined __DOXYGEN__ +#define LWIP_ARP 1 +#endif + +/** + * ARP_TABLE_SIZE: Number of active MAC-IP address pairs cached. + */ +#if !defined ARP_TABLE_SIZE || defined __DOXYGEN__ +#define ARP_TABLE_SIZE 10 +#endif + +/** the time an ARP entry stays valid after its last update, + * for ARP_TMR_INTERVAL = 1000, this is + * (60 * 5) seconds = 5 minutes. + */ +#if !defined ARP_MAXAGE || defined __DOXYGEN__ +#define ARP_MAXAGE 300 +#endif + +/** + * ARP_QUEUEING==1: Multiple outgoing packets are queued during hardware address + * resolution. By default, only the most recent packet is queued per IP address. + * This is sufficient for most protocols and mainly reduces TCP connection + * startup time. Set this to 1 if you know your application sends more than one + * packet in a row to an IP address that is not in the ARP cache. + */ +#if !defined ARP_QUEUEING || defined __DOXYGEN__ +#define ARP_QUEUEING 0 +#endif + +/** The maximum number of packets which may be queued for each + * unresolved address by other network layers. Defaults to 3, 0 means disabled. + * Old packets are dropped, new packets are queued. + */ +#if !defined ARP_QUEUE_LEN || defined __DOXYGEN__ +#define ARP_QUEUE_LEN 3 +#endif + +/** + * ETHARP_SUPPORT_VLAN==1: support receiving and sending ethernet packets with + * VLAN header. See the description of LWIP_HOOK_VLAN_CHECK and + * LWIP_HOOK_VLAN_SET hooks to check/set VLAN headers. + * Additionally, you can define ETHARP_VLAN_CHECK to an u16_t VLAN ID to check. + * If ETHARP_VLAN_CHECK is defined, only VLAN-traffic for this VLAN is accepted. + * If ETHARP_VLAN_CHECK is not defined, all traffic is accepted. + * Alternatively, define a function/define ETHARP_VLAN_CHECK_FN(eth_hdr, vlan) + * that returns 1 to accept a packet or 0 to drop a packet. + */ +#if !defined ETHARP_SUPPORT_VLAN || defined __DOXYGEN__ +#define ETHARP_SUPPORT_VLAN 0 +#endif + +/** + * LWIP_VLAN_PCP==1: Enable outgoing VLAN taggning of frames on a per-PCB basis + * for QoS purposes. With this feature enabled, each PCB has a new variable: + * "netif_hints.tci" (Tag Control Identifier). + * The TCI contains three fields: VID, CFI and PCP. + * - VID is the VLAN ID, which should be set to zero. + * - The "CFI" bit is used to enable or disable VLAN tags for the PCB. + * - PCP (Priority Code Point) is a 3 bit field used for Ethernet level QoS. + * See pcb_tci_*() functions to get/set/clear this. + */ +#ifndef LWIP_VLAN_PCP +#define LWIP_VLAN_PCP 0 +#endif + +/** LWIP_ETHERNET==1: enable ethernet support even though ARP might be disabled + */ +#if !defined LWIP_ETHERNET || defined __DOXYGEN__ +#define LWIP_ETHERNET LWIP_ARP +#endif + +/** ETH_PAD_SIZE: number of bytes added before the ethernet header to ensure + * alignment of payload after that header. Since the header is 14 bytes long, + * without this padding e.g. addresses in the IP header will not be aligned + * on a 32-bit boundary, so setting this to 2 can speed up 32-bit-platforms. + */ +#if !defined ETH_PAD_SIZE || defined __DOXYGEN__ +#define ETH_PAD_SIZE 0 +#endif + +/** ETHARP_SUPPORT_STATIC_ENTRIES==1: enable code to support static ARP table + * entries (using etharp_add_static_entry/etharp_remove_static_entry). + */ +#if !defined ETHARP_SUPPORT_STATIC_ENTRIES || defined __DOXYGEN__ +#define ETHARP_SUPPORT_STATIC_ENTRIES 0 +#endif + +/** ETHARP_TABLE_MATCH_NETIF==1: Match netif for ARP table entries. + * If disabled, duplicate IP address on multiple netifs are not supported + * (but this should only occur for AutoIP). + */ +#if !defined ETHARP_TABLE_MATCH_NETIF || defined __DOXYGEN__ +#define ETHARP_TABLE_MATCH_NETIF !LWIP_SINGLE_NETIF +#endif +/** + * @} + */ + +/* + -------------------------------- + ---------- IP options ---------- + -------------------------------- +*/ +/** + * @defgroup lwip_opts_ipv4 IPv4 + * @ingroup lwip_opts + * @{ + */ +/** + * LWIP_IPV4==1: Enable IPv4 + */ +#if !defined LWIP_IPV4 || defined __DOXYGEN__ +#define LWIP_IPV4 1 +#endif + +/** + * IP_FORWARD==1: Enables the ability to forward IP packets across network + * interfaces. If you are going to run lwIP on a device with only one network + * interface, define this to 0. + */ +#if !defined IP_FORWARD || defined __DOXYGEN__ +#define IP_FORWARD 0 +#endif + +/** + * IP_REASSEMBLY==1: Reassemble incoming fragmented IP packets. Note that + * this option does not affect outgoing packet sizes, which can be controlled + * via IP_FRAG. + */ +#if !defined IP_REASSEMBLY || defined __DOXYGEN__ +#define IP_REASSEMBLY 1 +#endif + +/** + * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note + * that this option does not affect incoming packet sizes, which can be + * controlled via IP_REASSEMBLY. + */ +#if !defined IP_FRAG || defined __DOXYGEN__ +#define IP_FRAG 1 +#endif + +#if !LWIP_IPV4 +/* disable IPv4 extensions when IPv4 is disabled */ +#undef IP_FORWARD +#define IP_FORWARD 0 +#undef IP_REASSEMBLY +#define IP_REASSEMBLY 0 +#undef IP_FRAG +#define IP_FRAG 0 +#endif /* !LWIP_IPV4 */ + +/** + * IP_OPTIONS_ALLOWED: Defines the behavior for IP options. + * IP_OPTIONS_ALLOWED==0: All packets with IP options are dropped. + * IP_OPTIONS_ALLOWED==1: IP options are allowed (but not parsed). + */ +#if !defined IP_OPTIONS_ALLOWED || defined __DOXYGEN__ +#define IP_OPTIONS_ALLOWED 1 +#endif + +/** + * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally) + * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived + * in this time, the whole packet is discarded. + */ +#if !defined IP_REASS_MAXAGE || defined __DOXYGEN__ +#define IP_REASS_MAXAGE 15 +#endif + +/** + * IP_REASS_MAX_PBUFS: Total maximum amount of pbufs waiting to be reassembled. + * Since the received pbufs are enqueued, be sure to configure + * PBUF_POOL_SIZE > IP_REASS_MAX_PBUFS so that the stack is still able to receive + * packets even if the maximum amount of fragments is enqueued for reassembly! + * When IPv4 *and* IPv6 are enabled, this even changes to + * (PBUF_POOL_SIZE > 2 * IP_REASS_MAX_PBUFS)! + */ +#if !defined IP_REASS_MAX_PBUFS || defined __DOXYGEN__ +#define IP_REASS_MAX_PBUFS 10 +#endif + +/** + * IP_DEFAULT_TTL: Default value for Time-To-Live used by transport layers. + */ +#if !defined IP_DEFAULT_TTL || defined __DOXYGEN__ +#define IP_DEFAULT_TTL 255 +#endif + +/** + * IP_SOF_BROADCAST=1: Use the SOF_BROADCAST field to enable broadcast + * filter per pcb on udp and raw send operations. To enable broadcast filter + * on recv operations, you also have to set IP_SOF_BROADCAST_RECV=1. + */ +#if !defined IP_SOF_BROADCAST || defined __DOXYGEN__ +#define IP_SOF_BROADCAST 0 +#endif + +/** + * IP_SOF_BROADCAST_RECV (requires IP_SOF_BROADCAST=1) enable the broadcast + * filter on recv operations. + */ +#if !defined IP_SOF_BROADCAST_RECV || defined __DOXYGEN__ +#define IP_SOF_BROADCAST_RECV 0 +#endif + +/** + * IP_FORWARD_ALLOW_TX_ON_RX_NETIF==1: allow ip_forward() to send packets back + * out on the netif where it was received. This should only be used for + * wireless networks. + * ATTENTION: When this is 1, make sure your netif driver correctly marks incoming + * link-layer-broadcast/multicast packets as such using the corresponding pbuf flags! + */ +#if !defined IP_FORWARD_ALLOW_TX_ON_RX_NETIF || defined __DOXYGEN__ +#define IP_FORWARD_ALLOW_TX_ON_RX_NETIF 0 +#endif +/** + * @} + */ + +/* + ---------------------------------- + ---------- ICMP options ---------- + ---------------------------------- +*/ +/** + * @defgroup lwip_opts_icmp ICMP + * @ingroup lwip_opts_ipv4 + * @{ + */ +/** + * LWIP_ICMP==1: Enable ICMP module inside the IP stack. + * Be careful, disable that make your product non-compliant to RFC1122 + */ +#if !defined LWIP_ICMP || defined __DOXYGEN__ +#define LWIP_ICMP 1 +#endif + +/** + * ICMP_TTL: Default value for Time-To-Live used by ICMP packets. + */ +#if !defined ICMP_TTL || defined __DOXYGEN__ +#define ICMP_TTL IP_DEFAULT_TTL +#endif + +/** + * LWIP_BROADCAST_PING==1: respond to broadcast pings (default is unicast only) + */ +#if !defined LWIP_BROADCAST_PING || defined __DOXYGEN__ +#define LWIP_BROADCAST_PING 0 +#endif + +/** + * LWIP_MULTICAST_PING==1: respond to multicast pings (default is unicast only) + */ +#if !defined LWIP_MULTICAST_PING || defined __DOXYGEN__ +#define LWIP_MULTICAST_PING 0 +#endif +/** + * @} + */ + +/* + --------------------------------- + ---------- RAW options ---------- + --------------------------------- +*/ +/** + * @defgroup lwip_opts_raw RAW + * @ingroup lwip_opts_callback + * @{ + */ +/** + * LWIP_RAW==1: Enable application layer to hook into the IP layer itself. + */ +#if !defined LWIP_RAW || defined __DOXYGEN__ +#define LWIP_RAW 0 +#endif + +/** + * LWIP_RAW==1: Enable application layer to hook into the IP layer itself. + */ +#if !defined RAW_TTL || defined __DOXYGEN__ +#define RAW_TTL IP_DEFAULT_TTL +#endif +/** + * @} + */ + +/* + ---------------------------------- + ---------- DHCP options ---------- + ---------------------------------- +*/ +/** + * @defgroup lwip_opts_dhcp DHCP + * @ingroup lwip_opts_ipv4 + * @{ + */ +/** + * LWIP_DHCP==1: Enable DHCP module. + */ +#if !defined LWIP_DHCP || defined __DOXYGEN__ +#define LWIP_DHCP 0 +#endif +#if !LWIP_IPV4 +/* disable DHCP when IPv4 is disabled */ +#undef LWIP_DHCP +#define LWIP_DHCP 0 +#endif /* !LWIP_IPV4 */ + +/** + * LWIP_DHCP_DOES_ACD_CHECK==1: Perform address conflict detection on the dhcp address. + */ +#if !defined LWIP_DHCP_DOES_ACD_CHECK || defined __DOXYGEN__ +#define LWIP_DHCP_DOES_ACD_CHECK LWIP_DHCP +#endif + +/** + * LWIP_DHCP_BOOTP_FILE==1: Store offered_si_addr and boot_file_name. + */ +#if !defined LWIP_DHCP_BOOTP_FILE || defined __DOXYGEN__ +#define LWIP_DHCP_BOOTP_FILE 0 +#endif + +/** + * LWIP_DHCP_GETS_NTP==1: Request NTP servers with discover/select. For each + * response packet, an callback is called, which has to be provided by the port: + * void dhcp_set_ntp_servers(u8_t num_ntp_servers, ip_addr_t* ntp_server_addrs); +*/ +#if !defined LWIP_DHCP_GET_NTP_SRV || defined __DOXYGEN__ +#define LWIP_DHCP_GET_NTP_SRV 0 +#endif + +/** + * The maximum of NTP servers requested + */ +#if !defined LWIP_DHCP_MAX_NTP_SERVERS || defined __DOXYGEN__ +#define LWIP_DHCP_MAX_NTP_SERVERS 1 +#endif + +/** + * LWIP_DHCP_MAX_DNS_SERVERS > 0: Request DNS servers with discover/select. + * DNS servers received in the response are passed to DNS via @ref dns_setserver() + * (up to the maximum limit defined here). + */ +#if !defined LWIP_DHCP_MAX_DNS_SERVERS || defined __DOXYGEN__ +#define LWIP_DHCP_MAX_DNS_SERVERS DNS_MAX_SERVERS +#endif + +/** LWIP_DHCP_DISCOVER_ADD_HOSTNAME: Set to 1 to include hostname opt in discover packets. + * If the hostname is not set in the DISCOVER packet, then some servers might issue an OFFER with hostname + * configured and consequently reject the REQUEST with any other hostname. + */ +#if !defined LWIP_DHCP_DISCOVER_ADD_HOSTNAME || defined __DOXYGEN__ +#define LWIP_DHCP_DISCOVER_ADD_HOSTNAME 0 +#endif /* LWIP_DHCP_DISCOVER_ADD_HOSTNAME */ +/** + * @} + */ + +/* + ------------------------------------ + ---------- AUTOIP options ---------- + ------------------------------------ +*/ +/** + * @defgroup lwip_opts_autoip AUTOIP + * @ingroup lwip_opts_ipv4 + * @{ + */ +/** + * LWIP_AUTOIP==1: Enable AUTOIP module. + */ +#if !defined LWIP_AUTOIP || defined __DOXYGEN__ +#define LWIP_AUTOIP 0 +#endif +#if !LWIP_IPV4 +/* disable AUTOIP when IPv4 is disabled */ +#undef LWIP_AUTOIP +#define LWIP_AUTOIP 0 +#endif /* !LWIP_IPV4 */ + +/** + * LWIP_DHCP_AUTOIP_COOP==1: Allow DHCP and AUTOIP to be both enabled on + * the same interface at the same time. + */ +#if !defined LWIP_DHCP_AUTOIP_COOP || defined __DOXYGEN__ +#define LWIP_DHCP_AUTOIP_COOP 0 +#endif + +/** + * LWIP_DHCP_AUTOIP_COOP_TRIES: Set to the number of DHCP DISCOVER probes + * that should be sent before falling back on AUTOIP (the DHCP client keeps + * running in this case). This can be set as low as 1 to get an AutoIP address + * very quickly, but you should be prepared to handle a changing IP address + * when DHCP overrides AutoIP. + */ +#if !defined LWIP_DHCP_AUTOIP_COOP_TRIES || defined __DOXYGEN__ +#define LWIP_DHCP_AUTOIP_COOP_TRIES 9 +#endif +/** + * @} + */ + +/* + ------------------------------------ + ----------- ACD options ------------ + ------------------------------------ +*/ +/** + * @defgroup lwip_opts_acd ACD + * @ingroup lwip_opts_ipv4 + * @{ + */ + /** + * LWIP_ACD==1: Enable ACD module. ACD module is needed when using AUTOIP. + */ +#if !defined LWIP_ACD || defined __DOXYGEN__ +#define LWIP_ACD (LWIP_AUTOIP || LWIP_DHCP_DOES_ACD_CHECK) +#endif +#if !LWIP_IPV4 +/* disable ACD when IPv4 is disabled */ +#undef LWIP_ACD +#define LWIP_ACD 0 +#endif /* !LWIP_IPV4 */ +/** + * @} + */ + +/* + ---------------------------------- + ----- SNMP MIB2 support ----- + ---------------------------------- +*/ +/** + * @defgroup lwip_opts_mib2 SNMP MIB2 callbacks + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * LWIP_MIB2_CALLBACKS==1: Turn on SNMP MIB2 callbacks. + * Turn this on to get callbacks needed to implement MIB2. + * Usually MIB2_STATS should be enabled, too. + */ +#if !defined LWIP_MIB2_CALLBACKS || defined __DOXYGEN__ +#define LWIP_MIB2_CALLBACKS 0 +#endif +/** + * @} + */ + +/* + ---------------------------------- + -------- Multicast options ------- + ---------------------------------- +*/ +/** + * @defgroup lwip_opts_multicast Multicast + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * LWIP_MULTICAST_TX_OPTIONS==1: Enable multicast TX support like the socket options + * IP_MULTICAST_TTL/IP_MULTICAST_IF/IP_MULTICAST_LOOP, as well as (currently only) + * core support for the corresponding IPv6 options. + */ +#if !defined LWIP_MULTICAST_TX_OPTIONS || defined __DOXYGEN__ +#define LWIP_MULTICAST_TX_OPTIONS ((LWIP_IGMP || LWIP_IPV6_MLD) && (LWIP_UDP || LWIP_RAW)) +#endif +/** + * @} + */ + +/* + ---------------------------------- + ---------- IGMP options ---------- + ---------------------------------- +*/ +/** + * @defgroup lwip_opts_igmp IGMP + * @ingroup lwip_opts_ipv4 + * @{ + */ +/** + * LWIP_IGMP==1: Turn on IGMP module. + */ +#if !defined LWIP_IGMP || defined __DOXYGEN__ +#define LWIP_IGMP 0 +#endif +#if !LWIP_IPV4 +#undef LWIP_IGMP +#define LWIP_IGMP 0 +#endif +/** + * @} + */ + +/* + ---------------------------------- + ---------- DNS options ----------- + ---------------------------------- +*/ +/** + * @defgroup lwip_opts_dns DNS + * @ingroup lwip_opts_callback + * @{ + */ +/** + * LWIP_DNS==1: Turn on DNS module. UDP must be available for DNS + * transport. + */ +#if !defined LWIP_DNS || defined __DOXYGEN__ +#define LWIP_DNS 0 +#endif + +/** DNS maximum number of entries to maintain locally. */ +#if !defined DNS_TABLE_SIZE || defined __DOXYGEN__ +#define DNS_TABLE_SIZE 4 +#endif + +/** DNS maximum host name length supported in the name table. */ +#if !defined DNS_MAX_NAME_LENGTH || defined __DOXYGEN__ +#define DNS_MAX_NAME_LENGTH 256 +#endif + +/** The maximum of DNS servers + * The first server can be initialized automatically by defining + * DNS_SERVER_ADDRESS(ipaddr), where 'ipaddr' is an 'ip_addr_t*' + */ +#if !defined DNS_MAX_SERVERS || defined __DOXYGEN__ +#define DNS_MAX_SERVERS 2 +#endif + +/** DNS maximum number of retries when asking for a name, before "timeout". */ +#if !defined DNS_MAX_RETRIES || defined __DOXYGEN__ +#define DNS_MAX_RETRIES 4 +#endif + +/** DNS do a name checking between the query and the response. */ +#if !defined DNS_DOES_NAME_CHECK || defined __DOXYGEN__ +#define DNS_DOES_NAME_CHECK 1 +#endif + +/** LWIP_DNS_SECURE: controls the security level of the DNS implementation + * Use all DNS security features by default. + * This is overridable but should only be needed by very small targets + * or when using against non standard DNS servers. */ +#if !defined LWIP_DNS_SECURE || defined __DOXYGEN__ +#define LWIP_DNS_SECURE (LWIP_DNS_SECURE_RAND_XID | LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING | LWIP_DNS_SECURE_RAND_SRC_PORT) +#endif + +/* A list of DNS security features follows */ +#define LWIP_DNS_SECURE_RAND_XID 1 +#define LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING 2 +#define LWIP_DNS_SECURE_RAND_SRC_PORT 4 + +/** DNS_LOCAL_HOSTLIST: Implements a local host-to-address list. If enabled, you have to define an initializer: + * #define DNS_LOCAL_HOSTLIST_INIT {DNS_LOCAL_HOSTLIST_ELEM("host_ip4", IPADDR4_INIT_BYTES(1,2,3,4)), \ + * DNS_LOCAL_HOSTLIST_ELEM("host_ip6", IPADDR6_INIT_HOST(123, 234, 345, 456)} + * + * Instead, you can also use an external function: + * #define DNS_LOOKUP_LOCAL_EXTERN(name, namelen, addr, dns_addrtype) my_lookup_function(name, namelen, addr, dns_addrtype) + * with function signature: + * extern err_t my_lookup_function(const char *name, size_t namelen, ip_addr_t *addr, u8_t dns_addrtype) + * that looks up the IP address and returns ERR_OK if found (LWIP_DNS_ADDRTYPE_xxx is passed in dns_addrtype). + */ +#if !defined DNS_LOCAL_HOSTLIST || defined __DOXYGEN__ +#define DNS_LOCAL_HOSTLIST 0 +#endif /* DNS_LOCAL_HOSTLIST */ + +/** If this is turned on, the local host-list can be dynamically changed + * at runtime. */ +#if !defined DNS_LOCAL_HOSTLIST_IS_DYNAMIC || defined __DOXYGEN__ +#define DNS_LOCAL_HOSTLIST_IS_DYNAMIC 0 +#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ + +/** Set this to 1 to enable querying ".local" names via mDNS + * using a One-Shot Multicast DNS Query */ +#if !defined LWIP_DNS_SUPPORT_MDNS_QUERIES || defined __DOXYGEN__ +#define LWIP_DNS_SUPPORT_MDNS_QUERIES 0 +#endif +/** + * @} + */ + +/* + --------------------------------- + ---------- UDP options ---------- + --------------------------------- +*/ +/** + * @defgroup lwip_opts_udp UDP + * @ingroup lwip_opts_callback + * @{ + */ +/** + * LWIP_UDP==1: Turn on UDP. + */ +#if !defined LWIP_UDP || defined __DOXYGEN__ +#define LWIP_UDP 1 +#endif + +/** + * LWIP_UDPLITE==1: Turn on UDP-Lite. (Requires LWIP_UDP) + */ +#if !defined LWIP_UDPLITE || defined __DOXYGEN__ +#define LWIP_UDPLITE 0 +#endif + +/** + * UDP_TTL: Default Time-To-Live value. + */ +#if !defined UDP_TTL || defined __DOXYGEN__ +#define UDP_TTL IP_DEFAULT_TTL +#endif + +/** + * LWIP_NETBUF_RECVINFO==1: append destination addr and port to every netbuf. + */ +#if !defined LWIP_NETBUF_RECVINFO || defined __DOXYGEN__ +#define LWIP_NETBUF_RECVINFO 0 +#endif +/** + * @} + */ + +/* + --------------------------------- + ---------- TCP options ---------- + --------------------------------- +*/ +/** + * @defgroup lwip_opts_tcp TCP + * @ingroup lwip_opts_callback + * @{ + */ +/** + * LWIP_TCP==1: Turn on TCP. + */ +#if !defined LWIP_TCP || defined __DOXYGEN__ +#define LWIP_TCP 1 +#endif + +/** + * TCP_TTL: Default Time-To-Live value. + */ +#if !defined TCP_TTL || defined __DOXYGEN__ +#define TCP_TTL IP_DEFAULT_TTL +#endif + +/** + * TCP_WND: The size of a TCP window. This must be at least + * (2 * TCP_MSS) for things to work well. + * ATTENTION: when using TCP_RCV_SCALE, TCP_WND is the total size + * with scaling applied. Maximum window value in the TCP header + * will be TCP_WND >> TCP_RCV_SCALE + */ +#if !defined TCP_WND || defined __DOXYGEN__ +#define TCP_WND (4 * TCP_MSS) +#endif + +/** + * TCP_MAXRTX: Maximum number of retransmissions of data segments. + */ +#if !defined TCP_MAXRTX || defined __DOXYGEN__ +#define TCP_MAXRTX 12 +#endif + +/** + * TCP_SYNMAXRTX: Maximum number of retransmissions of SYN segments. + */ +#if !defined TCP_SYNMAXRTX || defined __DOXYGEN__ +#define TCP_SYNMAXRTX 6 +#endif + +/** + * TCP_QUEUE_OOSEQ==1: TCP will queue segments that arrive out of order. + * Define to 0 if your device is low on memory. + */ +#if !defined TCP_QUEUE_OOSEQ || defined __DOXYGEN__ +#define TCP_QUEUE_OOSEQ LWIP_TCP +#endif + +/** + * LWIP_TCP_SACK_OUT==1: TCP will support sending selective acknowledgements (SACKs). + */ +#if !defined LWIP_TCP_SACK_OUT || defined __DOXYGEN__ +#define LWIP_TCP_SACK_OUT 0 +#endif + +/** + * LWIP_TCP_MAX_SACK_NUM: The maximum number of SACK values to include in TCP segments. + * Must be at least 1, but is only used if LWIP_TCP_SACK_OUT is enabled. + * NOTE: Even though we never send more than 3 or 4 SACK ranges in a single segment + * (depending on other options), setting this option to values greater than 4 is not pointless. + * This is basically the max number of SACK ranges we want to keep track of. + * As new data is delivered, some of the SACK ranges may be removed or merged. + * In that case some of those older SACK ranges may be used again. + * The amount of memory used to store SACK ranges is LWIP_TCP_MAX_SACK_NUM * 8 bytes for each TCP PCB. + */ +#if !defined LWIP_TCP_MAX_SACK_NUM || defined __DOXYGEN__ +#define LWIP_TCP_MAX_SACK_NUM 4 +#endif + +/** + * TCP_MSS: TCP Maximum segment size. (default is 536, a conservative default, + * you might want to increase this.) + * For the receive side, this MSS is advertised to the remote side + * when opening a connection. For the transmit size, this MSS sets + * an upper limit on the MSS advertised by the remote host. + */ +#if !defined TCP_MSS || defined __DOXYGEN__ +#define TCP_MSS 536 +#endif + +/** + * TCP_CALCULATE_EFF_SEND_MSS: "The maximum size of a segment that TCP really + * sends, the 'effective send MSS,' MUST be the smaller of the send MSS (which + * reflects the available reassembly buffer size at the remote host) and the + * largest size permitted by the IP layer" (RFC 1122) + * Setting this to 1 enables code that checks TCP_MSS against the MTU of the + * netif used for a connection and limits the MSS if it would be too big otherwise. + */ +#if !defined TCP_CALCULATE_EFF_SEND_MSS || defined __DOXYGEN__ +#define TCP_CALCULATE_EFF_SEND_MSS 1 +#endif + +/** + * LWIP_TCP_RTO_TIME: Initial TCP retransmission timeout (ms). + * This defaults to 3 seconds as traditionally defined in the TCP protocol. + * For improving timely recovery on faster networks, this value could + * be lowered down to 1 second (RFC 6298) + */ +#if !defined LWIP_TCP_RTO_TIME || defined __DOXYGEN__ +#define LWIP_TCP_RTO_TIME 3000 +#endif + +/** + * TCP_SND_BUF: TCP sender buffer space (bytes). + * To achieve good performance, this should be at least 2 * TCP_MSS. + */ +#if !defined TCP_SND_BUF || defined __DOXYGEN__ +#define TCP_SND_BUF (2 * TCP_MSS) +#endif + +/** + * TCP_SND_QUEUELEN: TCP sender buffer space (pbufs). This must be at least + * as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work. + */ +#if !defined TCP_SND_QUEUELEN || defined __DOXYGEN__ +#define TCP_SND_QUEUELEN ((4 * (TCP_SND_BUF) + (TCP_MSS - 1))/(TCP_MSS)) +#endif + +/** + * TCP_SNDLOWAT: TCP writable space (bytes). This must be less than + * TCP_SND_BUF. It is the amount of space which must be available in the + * TCP snd_buf for select to return writable (combined with TCP_SNDQUEUELOWAT). + */ +#if !defined TCP_SNDLOWAT || defined __DOXYGEN__ +#define TCP_SNDLOWAT LWIP_MIN(LWIP_MAX(((TCP_SND_BUF)/2), (2 * TCP_MSS) + 1), (TCP_SND_BUF) - 1) +#endif + +/** + * TCP_SNDQUEUELOWAT: TCP writable bufs (pbuf count). This must be less + * than TCP_SND_QUEUELEN. If the number of pbufs queued on a pcb drops below + * this number, select returns writable (combined with TCP_SNDLOWAT). + */ +#if !defined TCP_SNDQUEUELOWAT || defined __DOXYGEN__ +#define TCP_SNDQUEUELOWAT LWIP_MAX(((TCP_SND_QUEUELEN)/2), 5) +#endif + +/** + * TCP_OOSEQ_MAX_BYTES: The default maximum number of bytes queued on ooseq per + * pcb if TCP_OOSEQ_BYTES_LIMIT is not defined. Default is 0 (no limit). + * Only valid for TCP_QUEUE_OOSEQ==1. + */ +#if !defined TCP_OOSEQ_MAX_BYTES || defined __DOXYGEN__ +#define TCP_OOSEQ_MAX_BYTES 0 +#endif + +/** + * TCP_OOSEQ_BYTES_LIMIT(pcb): Return the maximum number of bytes to be queued + * on ooseq per pcb, given the pcb. Only valid for TCP_QUEUE_OOSEQ==1 && + * TCP_OOSEQ_MAX_BYTES==1. + * Use this to override TCP_OOSEQ_MAX_BYTES to a dynamic value per pcb. + */ +#if !defined TCP_OOSEQ_BYTES_LIMIT +#if TCP_OOSEQ_MAX_BYTES +#define TCP_OOSEQ_BYTES_LIMIT(pcb) TCP_OOSEQ_MAX_BYTES +#elif defined __DOXYGEN__ +#define TCP_OOSEQ_BYTES_LIMIT(pcb) +#endif +#endif + +/** + * TCP_OOSEQ_MAX_PBUFS: The default maximum number of pbufs queued on ooseq per + * pcb if TCP_OOSEQ_BYTES_LIMIT is not defined. Default is 0 (no limit). + * Only valid for TCP_QUEUE_OOSEQ==1. + */ +#if !defined TCP_OOSEQ_MAX_PBUFS || defined __DOXYGEN__ +#define TCP_OOSEQ_MAX_PBUFS 0 +#endif + +/** + * TCP_OOSEQ_PBUFS_LIMIT(pcb): Return the maximum number of pbufs to be queued + * on ooseq per pcb, given the pcb. Only valid for TCP_QUEUE_OOSEQ==1 && + * TCP_OOSEQ_MAX_PBUFS==1. + * Use this to override TCP_OOSEQ_MAX_PBUFS to a dynamic value per pcb. + */ +#if !defined TCP_OOSEQ_PBUFS_LIMIT +#if TCP_OOSEQ_MAX_PBUFS +#define TCP_OOSEQ_PBUFS_LIMIT(pcb) TCP_OOSEQ_MAX_PBUFS +#elif defined __DOXYGEN__ +#define TCP_OOSEQ_PBUFS_LIMIT(pcb) +#endif +#endif + +/** + * TCP_LISTEN_BACKLOG: Enable the backlog option for tcp listen pcb. + */ +#if !defined TCP_LISTEN_BACKLOG || defined __DOXYGEN__ +#define TCP_LISTEN_BACKLOG 0 +#endif + +/** + * The maximum allowed backlog for TCP listen netconns. + * This backlog is used unless another is explicitly specified. + * 0xff is the maximum (u8_t). + */ +#if !defined TCP_DEFAULT_LISTEN_BACKLOG || defined __DOXYGEN__ +#define TCP_DEFAULT_LISTEN_BACKLOG 0xff +#endif + +/** + * TCP_OVERSIZE: The maximum number of bytes that tcp_write may + * allocate ahead of time in an attempt to create shorter pbuf chains + * for transmission. The meaningful range is 0 to TCP_MSS. Some + * suggested values are: + * + * 0: Disable oversized allocation. Each tcp_write() allocates a new + pbuf (old behaviour). + * 1: Allocate size-aligned pbufs with minimal excess. Use this if your + * scatter-gather DMA requires aligned fragments. + * 128: Limit the pbuf/memory overhead to 20%. + * TCP_MSS: Try to create unfragmented TCP packets. + * TCP_MSS/4: Try to create 4 fragments or less per TCP packet. + */ +#if !defined TCP_OVERSIZE || defined __DOXYGEN__ +#define TCP_OVERSIZE TCP_MSS +#endif + +/** + * LWIP_TCP_TIMESTAMPS==1: support the TCP timestamp option. + * The timestamp option is currently only used to help remote hosts, it is not + * really used locally. Therefore, it is only enabled when a TS option is + * received in the initial SYN packet from a remote host. + */ +#if !defined LWIP_TCP_TIMESTAMPS || defined __DOXYGEN__ +#define LWIP_TCP_TIMESTAMPS 0 +#endif + +/** + * TCP_WND_UPDATE_THRESHOLD: difference in window to trigger an + * explicit window update + */ +#if !defined TCP_WND_UPDATE_THRESHOLD || defined __DOXYGEN__ +#define TCP_WND_UPDATE_THRESHOLD LWIP_MIN((TCP_WND / 4), (TCP_MSS * 4)) +#endif + +/** + * LWIP_EVENT_API and LWIP_CALLBACK_API: Only one of these should be set to 1. + * LWIP_EVENT_API==1: The user defines lwip_tcp_event() to receive all + * events (accept, sent, etc) that happen in the system. + * LWIP_CALLBACK_API==1: The PCB callback function is called directly + * for the event. This is the default. + */ +#if !defined(LWIP_EVENT_API) && !defined(LWIP_CALLBACK_API) || defined __DOXYGEN__ +#define LWIP_EVENT_API 0 +#define LWIP_CALLBACK_API 1 +#else +#ifndef LWIP_EVENT_API +#define LWIP_EVENT_API 0 +#endif +#ifndef LWIP_CALLBACK_API +#define LWIP_CALLBACK_API 0 +#endif +#endif + +/** + * LWIP_WND_SCALE and TCP_RCV_SCALE: + * Set LWIP_WND_SCALE to 1 to enable window scaling. + * Set TCP_RCV_SCALE to the desired scaling factor (shift count in the + * range of [0..14]). + * When LWIP_WND_SCALE is enabled but TCP_RCV_SCALE is 0, we can use a large + * send window while having a small receive window only. + */ +#if !defined LWIP_WND_SCALE || defined __DOXYGEN__ +#define LWIP_WND_SCALE 0 +#define TCP_RCV_SCALE 0 +#endif + +/** + * LWIP_TCP_PCB_NUM_EXT_ARGS: + * When this is > 0, every tcp pcb (including listen pcb) includes a number of + * additional argument entries in an array (see tcp_ext_arg_alloc_id) + */ +#if !defined LWIP_TCP_PCB_NUM_EXT_ARGS || defined __DOXYGEN__ +#define LWIP_TCP_PCB_NUM_EXT_ARGS 0 +#endif + +/** LWIP_ALTCP==1: enable the altcp API. + * altcp is an abstraction layer that prevents applications linking against the + * tcp.h functions but provides the same functionality. It is used to e.g. add + * SSL/TLS or proxy-connect support to an application written for the tcp callback + * API without that application knowing the protocol details. + * + * With LWIP_ALTCP==0, applications written against the altcp API can still be + * compiled but are directly linked against the tcp.h callback API and then + * cannot use layered protocols. + * + * See @ref altcp_api + */ +#if !defined LWIP_ALTCP || defined __DOXYGEN__ +#define LWIP_ALTCP 0 +#endif + +/** LWIP_ALTCP_TLS==1: enable TLS support for altcp API. + * This needs a port of the functions in altcp_tls.h to a TLS library. + * A port to ARM mbedtls is provided with lwIP, see apps/altcp_tls/ directory + * and LWIP_ALTCP_TLS_MBEDTLS option. + */ +#if !defined LWIP_ALTCP_TLS || defined __DOXYGEN__ +#define LWIP_ALTCP_TLS 0 +#endif + +/** + * @} + */ + +/* + ---------------------------------- + ---------- Pbuf options ---------- + ---------------------------------- +*/ +/** + * @defgroup lwip_opts_pbuf PBUF + * @ingroup lwip_opts + * @{ + */ +/** + * PBUF_LINK_HLEN: the number of bytes that should be allocated for a + * link level header. The default is 14, the standard value for + * Ethernet. + */ + #if !defined PBUF_LINK_HLEN || defined __DOXYGEN__ +#if (defined LWIP_HOOK_VLAN_SET || LWIP_VLAN_PCP) && !defined __DOXYGEN__ + #define PBUF_LINK_HLEN (18 + ETH_PAD_SIZE) +#else /* LWIP_HOOK_VLAN_SET || LWIP_VLAN_PCP */ + #define PBUF_LINK_HLEN (14 + ETH_PAD_SIZE) +#endif /* LWIP_HOOK_VLAN_SET || LWIP_VLAN_PCP */ + #endif + +/** + * PBUF_LINK_ENCAPSULATION_HLEN: the number of bytes that should be allocated + * for an additional encapsulation header before ethernet headers (e.g. 802.11) + */ +#if !defined PBUF_LINK_ENCAPSULATION_HLEN || defined __DOXYGEN__ +#define PBUF_LINK_ENCAPSULATION_HLEN 0 +#endif + +/** + * PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. The default is + * designed to accommodate single full size TCP frame in one pbuf, including + * TCP_MSS, IP header, and link header. + */ +#if !defined PBUF_POOL_BUFSIZE || defined __DOXYGEN__ +#define PBUF_POOL_BUFSIZE LWIP_MEM_ALIGN_SIZE(TCP_MSS+PBUF_IP_HLEN+PBUF_TRANSPORT_HLEN+PBUF_LINK_ENCAPSULATION_HLEN+PBUF_LINK_HLEN) +#endif + +/** + * LWIP_PBUF_REF_T: Refcount type in pbuf. + * Default width of u8_t can be increased if 255 refs are not enough for you. + */ +#if !defined LWIP_PBUF_REF_T || defined __DOXYGEN__ +#define LWIP_PBUF_REF_T u8_t +#endif + +/** + * LWIP_PBUF_CUSTOM_DATA: Store private data on pbufs (e.g. timestamps) + * This extends struct pbuf so user can store custom data on every pbuf. + */ +#if !defined LWIP_PBUF_CUSTOM_DATA || defined __DOXYGEN__ +#define LWIP_PBUF_CUSTOM_DATA +#endif +/** + * @} + */ + +/* + ------------------------------------------------ + ---------- Network Interfaces options ---------- + ------------------------------------------------ +*/ +/** + * @defgroup lwip_opts_netif NETIF + * @ingroup lwip_opts + * @{ + */ +/** + * LWIP_SINGLE_NETIF==1: use a single netif only. This is the common case for + * small real-life targets. Some code like routing etc. can be left out. + */ +#if !defined LWIP_SINGLE_NETIF || defined __DOXYGEN__ +#define LWIP_SINGLE_NETIF 0 +#endif + +/** + * LWIP_NETIF_HOSTNAME==1: use DHCP_OPTION_HOSTNAME with netif's hostname + * field. + */ +#if !defined LWIP_NETIF_HOSTNAME || defined __DOXYGEN__ +#define LWIP_NETIF_HOSTNAME 0 +#endif + +/** + * LWIP_NETIF_API==1: Support netif api (in netifapi.c) + */ +#if !defined LWIP_NETIF_API || defined __DOXYGEN__ +#define LWIP_NETIF_API 0 +#endif + +/** + * LWIP_NETIF_STATUS_CALLBACK==1: Support a callback function whenever an interface + * changes its up/down status (i.e., due to DHCP IP acquisition) + */ +#if !defined LWIP_NETIF_STATUS_CALLBACK || defined __DOXYGEN__ +#define LWIP_NETIF_STATUS_CALLBACK 0 +#endif + +/** + * LWIP_NETIF_EXT_STATUS_CALLBACK==1: Support an extended callback function + * for several netif related event that supports multiple subscribers. + * @see netif_ext_status_callback + */ +#if !defined LWIP_NETIF_EXT_STATUS_CALLBACK || defined __DOXYGEN__ +#define LWIP_NETIF_EXT_STATUS_CALLBACK 0 +#endif + +/** + * LWIP_NETIF_LINK_CALLBACK==1: Support a callback function from an interface + * whenever the link changes (i.e., link down) + */ +#if !defined LWIP_NETIF_LINK_CALLBACK || defined __DOXYGEN__ +#define LWIP_NETIF_LINK_CALLBACK 0 +#endif + +/** + * LWIP_NETIF_REMOVE_CALLBACK==1: Support a callback function that is called + * when a netif has been removed + */ +#if !defined LWIP_NETIF_REMOVE_CALLBACK || defined __DOXYGEN__ +#define LWIP_NETIF_REMOVE_CALLBACK 0 +#endif + +/** + * LWIP_NETIF_HWADDRHINT==1: Cache link-layer-address hints (e.g. table + * indices) in struct netif. TCP and UDP can make use of this to prevent + * scanning the ARP table for every sent packet. While this is faster for big + * ARP tables or many concurrent connections, it might be counterproductive + * if you have a tiny ARP table or if there never are concurrent connections. + */ +#if !defined LWIP_NETIF_HWADDRHINT || defined __DOXYGEN__ +#define LWIP_NETIF_HWADDRHINT 0 +#endif + +/** + * LWIP_NETIF_TX_SINGLE_PBUF: if this is set to 1, lwIP *tries* to put all data + * to be sent into one single pbuf. This is for compatibility with DMA-enabled + * MACs that do not support scatter-gather. + * Beware that this might involve CPU-memcpy before transmitting that would not + * be needed without this flag! Use this only if you need to! + * + * ATTENTION: a driver should *NOT* rely on getting single pbufs but check TX + * pbufs for being in one piece. If not, @ref pbuf_clone can be used to get + * a single pbuf: + * if (p->next != NULL) { + * struct pbuf *q = pbuf_clone(PBUF_RAW, PBUF_RAM, p); + * if (q == NULL) { + * return ERR_MEM; + * } + * p = q; ATTENTION: do NOT free the old 'p' as the ref belongs to the caller! + * } + */ +#if !defined LWIP_NETIF_TX_SINGLE_PBUF || defined __DOXYGEN__ +#define LWIP_NETIF_TX_SINGLE_PBUF 0 +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + +/** + * LWIP_NUM_NETIF_CLIENT_DATA: Number of clients that may store + * data in client_data member array of struct netif (max. 256). + */ +#if !defined LWIP_NUM_NETIF_CLIENT_DATA || defined __DOXYGEN__ +#define LWIP_NUM_NETIF_CLIENT_DATA 0 +#endif +/** + * @} + */ + +/* + ------------------------------------ + ---------- LOOPIF options ---------- + ------------------------------------ +*/ +/** + * @defgroup lwip_opts_loop Loopback interface + * @ingroup lwip_opts_netif + * @{ + */ +/** + * LWIP_HAVE_LOOPIF==1: Support loop interface (127.0.0.1). + * This is only needed when no real netifs are available. If at least one other + * netif is available, loopback traffic uses this netif. + */ +#if !defined LWIP_HAVE_LOOPIF || defined __DOXYGEN__ +#define LWIP_HAVE_LOOPIF (LWIP_NETIF_LOOPBACK && !LWIP_SINGLE_NETIF) +#endif + +/** + * LWIP_LOOPIF_MULTICAST==1: Support multicast/IGMP on loop interface (127.0.0.1). + */ +#if !defined LWIP_LOOPIF_MULTICAST || defined __DOXYGEN__ +#define LWIP_LOOPIF_MULTICAST 0 +#endif + +/** + * LWIP_NETIF_LOOPBACK==1: Support sending packets with a destination IP + * address equal to the netif IP address, looping them back up the stack. + */ +#if !defined LWIP_NETIF_LOOPBACK || defined __DOXYGEN__ +#define LWIP_NETIF_LOOPBACK 0 +#endif + +/** + * LWIP_LOOPBACK_MAX_PBUFS: Maximum number of pbufs on queue for loopback + * sending for each netif (0 = disabled) + */ +#if !defined LWIP_LOOPBACK_MAX_PBUFS || defined __DOXYGEN__ +#define LWIP_LOOPBACK_MAX_PBUFS 0 +#endif + +/** + * LWIP_NETIF_LOOPBACK_MULTITHREADING: Indicates whether threading is enabled in + * the system, as netifs must change how they behave depending on this setting + * for the LWIP_NETIF_LOOPBACK option to work. + * Setting this is needed to avoid reentering non-reentrant functions like + * tcp_input(). + * LWIP_NETIF_LOOPBACK_MULTITHREADING==1: Indicates that the user is using a + * multithreaded environment like tcpip.c. In this case, netif->input() + * is called directly. + * LWIP_NETIF_LOOPBACK_MULTITHREADING==0: Indicates a polling (or NO_SYS) setup. + * The packets are put on a list and netif_poll() must be called in + * the main application loop. + */ +#if !defined LWIP_NETIF_LOOPBACK_MULTITHREADING || defined __DOXYGEN__ +#define LWIP_NETIF_LOOPBACK_MULTITHREADING (!NO_SYS) +#endif +/** + * @} + */ + +/* + ------------------------------------ + ---------- Thread options ---------- + ------------------------------------ +*/ +/** + * @defgroup lwip_opts_thread Threading + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * TCPIP_THREAD_NAME: The name assigned to the main tcpip thread. + */ +#if !defined TCPIP_THREAD_NAME || defined __DOXYGEN__ +#define TCPIP_THREAD_NAME "tcpip_thread" +#endif + +/** + * TCPIP_THREAD_STACKSIZE: The stack size used by the main tcpip thread. + * The stack size value itself is platform-dependent, but is passed to + * sys_thread_new() when the thread is created. + */ +#if !defined TCPIP_THREAD_STACKSIZE || defined __DOXYGEN__ +#define TCPIP_THREAD_STACKSIZE 0 +#endif + +/** + * TCPIP_THREAD_PRIO: The priority assigned to the main tcpip thread. + * The priority value itself is platform-dependent, but is passed to + * sys_thread_new() when the thread is created. + */ +#if !defined TCPIP_THREAD_PRIO || defined __DOXYGEN__ +#define TCPIP_THREAD_PRIO 1 +#endif + +/** + * TCPIP_MBOX_SIZE: The mailbox size for the tcpip thread messages + * The queue size value itself is platform-dependent, but is passed to + * sys_mbox_new() when tcpip_init is called. + */ +#if !defined TCPIP_MBOX_SIZE || defined __DOXYGEN__ +#define TCPIP_MBOX_SIZE 0 +#endif + +/** + * Define this to something that triggers a watchdog. This is called from + * tcpip_thread after processing a message. + */ +#if !defined LWIP_TCPIP_THREAD_ALIVE || defined __DOXYGEN__ +#define LWIP_TCPIP_THREAD_ALIVE() +#endif + +/** + * SLIPIF_THREAD_NAME: The name assigned to the slipif_loop thread. + */ +#if !defined SLIPIF_THREAD_NAME || defined __DOXYGEN__ +#define SLIPIF_THREAD_NAME "slipif_loop" +#endif + +/** + * SLIP_THREAD_STACKSIZE: The stack size used by the slipif_loop thread. + * The stack size value itself is platform-dependent, but is passed to + * sys_thread_new() when the thread is created. + */ +#if !defined SLIPIF_THREAD_STACKSIZE || defined __DOXYGEN__ +#define SLIPIF_THREAD_STACKSIZE 0 +#endif + +/** + * SLIPIF_THREAD_PRIO: The priority assigned to the slipif_loop thread. + * The priority value itself is platform-dependent, but is passed to + * sys_thread_new() when the thread is created. + */ +#if !defined SLIPIF_THREAD_PRIO || defined __DOXYGEN__ +#define SLIPIF_THREAD_PRIO 1 +#endif + +/** + * DEFAULT_THREAD_NAME: The name assigned to any other lwIP thread. + */ +#if !defined DEFAULT_THREAD_NAME || defined __DOXYGEN__ +#define DEFAULT_THREAD_NAME "lwIP" +#endif + +/** + * DEFAULT_THREAD_STACKSIZE: The stack size used by any other lwIP thread. + * The stack size value itself is platform-dependent, but is passed to + * sys_thread_new() when the thread is created. + */ +#if !defined DEFAULT_THREAD_STACKSIZE || defined __DOXYGEN__ +#define DEFAULT_THREAD_STACKSIZE 0 +#endif + +/** + * DEFAULT_THREAD_PRIO: The priority assigned to any other lwIP thread. + * The priority value itself is platform-dependent, but is passed to + * sys_thread_new() when the thread is created. + */ +#if !defined DEFAULT_THREAD_PRIO || defined __DOXYGEN__ +#define DEFAULT_THREAD_PRIO 1 +#endif + +/** + * DEFAULT_RAW_RECVMBOX_SIZE: The mailbox size for the incoming packets on a + * NETCONN_RAW. The queue size value itself is platform-dependent, but is passed + * to sys_mbox_new() when the recvmbox is created. + */ +#if !defined DEFAULT_RAW_RECVMBOX_SIZE || defined __DOXYGEN__ +#define DEFAULT_RAW_RECVMBOX_SIZE 0 +#endif + +/** + * DEFAULT_UDP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a + * NETCONN_UDP. The queue size value itself is platform-dependent, but is passed + * to sys_mbox_new() when the recvmbox is created. + */ +#if !defined DEFAULT_UDP_RECVMBOX_SIZE || defined __DOXYGEN__ +#define DEFAULT_UDP_RECVMBOX_SIZE 0 +#endif + +/** + * DEFAULT_TCP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a + * NETCONN_TCP. The queue size value itself is platform-dependent, but is passed + * to sys_mbox_new() when the recvmbox is created. + */ +#if !defined DEFAULT_TCP_RECVMBOX_SIZE || defined __DOXYGEN__ +#define DEFAULT_TCP_RECVMBOX_SIZE 0 +#endif + +/** + * DEFAULT_ACCEPTMBOX_SIZE: The mailbox size for the incoming connections. + * The queue size value itself is platform-dependent, but is passed to + * sys_mbox_new() when the acceptmbox is created. + */ +#if !defined DEFAULT_ACCEPTMBOX_SIZE || defined __DOXYGEN__ +#define DEFAULT_ACCEPTMBOX_SIZE 0 +#endif +/** + * @} + */ + +/* + ---------------------------------------------- + ---------- Sequential layer options ---------- + ---------------------------------------------- +*/ +/** + * @defgroup lwip_opts_netconn Netconn + * @ingroup lwip_opts_threadsafe_apis + * @{ + */ +/** + * LWIP_NETCONN==1: Enable Netconn API (require to use api_lib.c) + */ +#if !defined LWIP_NETCONN || defined __DOXYGEN__ +#define LWIP_NETCONN 1 +#endif + +/** LWIP_TCPIP_TIMEOUT==1: Enable tcpip_timeout/tcpip_untimeout to create + * timers running in tcpip_thread from another thread. + */ +#if !defined LWIP_TCPIP_TIMEOUT || defined __DOXYGEN__ +#define LWIP_TCPIP_TIMEOUT 0 +#endif + +/** LWIP_NETCONN_SEM_PER_THREAD==1: Use one (thread-local) semaphore per + * thread calling socket/netconn functions instead of allocating one + * semaphore per netconn (and per select etc.) + * ATTENTION: a thread-local semaphore for API calls is needed: + * - LWIP_NETCONN_THREAD_SEM_GET() returning a sys_sem_t* + * - LWIP_NETCONN_THREAD_SEM_ALLOC() creating the semaphore + * - LWIP_NETCONN_THREAD_SEM_FREE() freeing the semaphore + * The latter 2 can be invoked up by calling netconn_thread_init()/netconn_thread_cleanup(). + * Ports may call these for threads created with sys_thread_new(). + */ +#if !defined LWIP_NETCONN_SEM_PER_THREAD || defined __DOXYGEN__ +#define LWIP_NETCONN_SEM_PER_THREAD 0 +#endif + +/** LWIP_NETCONN_FULLDUPLEX==1: Enable code that allows reading from one thread, + * writing from a 2nd thread and closing from a 3rd thread at the same time. + * LWIP_NETCONN_SEM_PER_THREAD==1 is required to use one socket/netconn from + * multiple threads at once! + */ +#if !defined LWIP_NETCONN_FULLDUPLEX || defined __DOXYGEN__ +#define LWIP_NETCONN_FULLDUPLEX 0 +#endif +/** + * @} + */ + +/* + ------------------------------------ + ---------- Socket options ---------- + ------------------------------------ +*/ +/** + * @defgroup lwip_opts_socket Sockets + * @ingroup lwip_opts_threadsafe_apis + * @{ + */ +/** + * LWIP_SOCKET==1: Enable Socket API (require to use sockets.c) + */ +#if !defined LWIP_SOCKET || defined __DOXYGEN__ +#define LWIP_SOCKET 1 +#endif + +/** + * LWIP_COMPAT_SOCKETS==1: Enable BSD-style sockets functions names through defines. + * LWIP_COMPAT_SOCKETS==2: Same as ==1 but correctly named functions are created. + * While this helps code completion, it might conflict with existing libraries. + * (only used if you use sockets.c) + */ +#if !defined LWIP_COMPAT_SOCKETS || defined __DOXYGEN__ +#define LWIP_COMPAT_SOCKETS 1 +#endif + +/** + * LWIP_POSIX_SOCKETS_IO_NAMES==1: Enable POSIX-style sockets functions names. + * Disable this option if you use a POSIX operating system that uses the same + * names (read, write & close). (only used if you use sockets.c) + */ +#if !defined LWIP_POSIX_SOCKETS_IO_NAMES || defined __DOXYGEN__ +#define LWIP_POSIX_SOCKETS_IO_NAMES 1 +#endif + +/** + * LWIP_SOCKET_OFFSET==n: Increases the file descriptor number created by LwIP with n. + * This can be useful when there are multiple APIs which create file descriptors. + * When they all start with a different offset and you won't make them overlap you can + * re implement read/write/close/ioctl/fnctl to send the requested action to the right + * library (sharing select will need more work though). + */ +#if !defined LWIP_SOCKET_OFFSET || defined __DOXYGEN__ +#define LWIP_SOCKET_OFFSET 0 +#endif + +/** + * LWIP_SOCKET_EXTERNAL_HEADERS==1: Use external headers instead of sockets.h + * and inet.h. In this case, user must provide its own headers by setting the + * values for LWIP_SOCKET_EXTERNAL_HEADER_SOCKETS_H and + * LWIP_SOCKET_EXTERNAL_HEADER_INET_H to appropriate include file names and the + * whole content of the default sockets.h and inet.h is skipped. + */ +#if !defined LWIP_SOCKET_EXTERNAL_HEADERS || defined __DOXYGEN__ +#define LWIP_SOCKET_EXTERNAL_HEADERS 0 +#endif + +/** + * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT + * options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set + * in seconds. (does not require sockets.c, and will affect tcp.c) + */ +#if !defined LWIP_TCP_KEEPALIVE || defined __DOXYGEN__ +#define LWIP_TCP_KEEPALIVE 0 +#endif + +/** + * LWIP_SO_SNDTIMEO==1: Enable send timeout for sockets/netconns and + * SO_SNDTIMEO processing. + */ +#if !defined LWIP_SO_SNDTIMEO || defined __DOXYGEN__ +#define LWIP_SO_SNDTIMEO 0 +#endif + +/** + * LWIP_SO_RCVTIMEO==1: Enable receive timeout for sockets/netconns and + * SO_RCVTIMEO processing. + */ +#if !defined LWIP_SO_RCVTIMEO || defined __DOXYGEN__ +#define LWIP_SO_RCVTIMEO 0 +#endif + +/** + * LWIP_SO_SNDRCVTIMEO_NONSTANDARD==1: SO_RCVTIMEO/SO_SNDTIMEO take an int + * (milliseconds, much like winsock does) instead of a struct timeval (default). + */ +#if !defined LWIP_SO_SNDRCVTIMEO_NONSTANDARD || defined __DOXYGEN__ +#define LWIP_SO_SNDRCVTIMEO_NONSTANDARD 0 +#endif + +/** + * LWIP_SO_RCVBUF==1: Enable SO_RCVBUF processing. + */ +#if !defined LWIP_SO_RCVBUF || defined __DOXYGEN__ +#define LWIP_SO_RCVBUF 0 +#endif + +/** + * LWIP_SO_LINGER==1: Enable SO_LINGER processing. + */ +#if !defined LWIP_SO_LINGER || defined __DOXYGEN__ +#define LWIP_SO_LINGER 0 +#endif + +/** + * If LWIP_SO_RCVBUF is used, this is the default value for recv_bufsize. + */ +#if !defined RECV_BUFSIZE_DEFAULT || defined __DOXYGEN__ +#define RECV_BUFSIZE_DEFAULT INT_MAX +#endif + +/** + * By default, TCP socket/netconn close waits 20 seconds max to send the FIN + */ +#if !defined LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT || defined __DOXYGEN__ +#define LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT 20000 +#endif + +/** + * SO_REUSE==1: Enable SO_REUSEADDR option. + */ +#if !defined SO_REUSE || defined __DOXYGEN__ +#define SO_REUSE 0 +#endif + +/** + * SO_REUSE_RXTOALL==1: Pass a copy of incoming broadcast/multicast packets + * to all local matches if SO_REUSEADDR is turned on. + * WARNING: Adds a memcpy for every packet if passing to more than one pcb! + */ +#if !defined SO_REUSE_RXTOALL || defined __DOXYGEN__ +#define SO_REUSE_RXTOALL 0 +#endif + +/** + * LWIP_FIONREAD_LINUXMODE==0 (default): ioctl/FIONREAD returns the amount of + * pending data in the network buffer. This is the way windows does it. It's + * the default for lwIP since it is smaller. + * LWIP_FIONREAD_LINUXMODE==1: ioctl/FIONREAD returns the size of the next + * pending datagram in bytes. This is the way linux does it. This code is only + * here for compatibility. + */ +#if !defined LWIP_FIONREAD_LINUXMODE || defined __DOXYGEN__ +#define LWIP_FIONREAD_LINUXMODE 0 +#endif + +/** + * LWIP_SOCKET_SELECT==1 (default): enable select() for sockets (uses a netconn + * callback to keep track of events). + * This saves RAM (counters per socket) and code (netconn event callback), which + * should improve performance a bit). + */ +#if !defined LWIP_SOCKET_SELECT || defined __DOXYGEN__ +#define LWIP_SOCKET_SELECT 1 +#endif + +/** + * LWIP_SOCKET_POLL==1 (default): enable poll() for sockets (including + * struct pollfd, nfds_t, and constants) + */ +#if !defined LWIP_SOCKET_POLL || defined __DOXYGEN__ +#define LWIP_SOCKET_POLL 1 +#endif +/** + * @} + */ + +/* + ---------------------------------------- + ---------- Statistics options ---------- + ---------------------------------------- +*/ +/** + * @defgroup lwip_opts_stats Statistics + * @ingroup lwip_opts_debug + * @{ + */ +/** + * LWIP_STATS==1: Enable statistics collection in lwip_stats. + */ +#if !defined LWIP_STATS || defined __DOXYGEN__ +#define LWIP_STATS 1 +#endif + +#if LWIP_STATS + +/** + * LWIP_STATS_DISPLAY==1: Compile in the statistics output functions. + */ +#if !defined LWIP_STATS_DISPLAY || defined __DOXYGEN__ +#define LWIP_STATS_DISPLAY 0 +#endif + +/** + * LINK_STATS==1: Enable link stats. + */ +#if !defined LINK_STATS || defined __DOXYGEN__ +#define LINK_STATS 1 +#endif + +/** + * ETHARP_STATS==1: Enable etharp stats. + */ +#if !defined ETHARP_STATS || defined __DOXYGEN__ +#define ETHARP_STATS (LWIP_ARP) +#endif + +/** + * IP_STATS==1: Enable IP stats. + */ +#if !defined IP_STATS || defined __DOXYGEN__ +#define IP_STATS 1 +#endif + +/** + * IPFRAG_STATS==1: Enable IP fragmentation stats. Default is + * on if using either frag or reass. + */ +#if !defined IPFRAG_STATS || defined __DOXYGEN__ +#define IPFRAG_STATS (IP_REASSEMBLY || IP_FRAG) +#endif + +/** + * ICMP_STATS==1: Enable ICMP stats. + */ +#if !defined ICMP_STATS || defined __DOXYGEN__ +#define ICMP_STATS 1 +#endif + +/** + * IGMP_STATS==1: Enable IGMP stats. + */ +#if !defined IGMP_STATS || defined __DOXYGEN__ +#define IGMP_STATS (LWIP_IGMP) +#endif + +/** + * UDP_STATS==1: Enable UDP stats. Default is on if + * UDP enabled, otherwise off. + */ +#if !defined UDP_STATS || defined __DOXYGEN__ +#define UDP_STATS (LWIP_UDP) +#endif + +/** + * TCP_STATS==1: Enable TCP stats. Default is on if TCP + * enabled, otherwise off. + */ +#if !defined TCP_STATS || defined __DOXYGEN__ +#define TCP_STATS (LWIP_TCP) +#endif + +/** + * MEM_STATS==1: Enable mem.c stats. + */ +#if !defined MEM_STATS || defined __DOXYGEN__ +#define MEM_STATS ((MEM_LIBC_MALLOC == 0) && (MEM_USE_POOLS == 0)) +#endif + +/** + * MEMP_STATS==1: Enable memp.c pool stats. + */ +#if !defined MEMP_STATS || defined __DOXYGEN__ +#define MEMP_STATS (MEMP_MEM_MALLOC == 0) +#endif + +/** + * SYS_STATS==1: Enable system stats (sem and mbox counts, etc). + */ +#if !defined SYS_STATS || defined __DOXYGEN__ +#define SYS_STATS (NO_SYS == 0) +#endif + +/** + * IP6_STATS==1: Enable IPv6 stats. + */ +#if !defined IP6_STATS || defined __DOXYGEN__ +#define IP6_STATS (LWIP_IPV6) +#endif + +/** + * ICMP6_STATS==1: Enable ICMP for IPv6 stats. + */ +#if !defined ICMP6_STATS || defined __DOXYGEN__ +#define ICMP6_STATS (LWIP_IPV6 && LWIP_ICMP6) +#endif + +/** + * IP6_FRAG_STATS==1: Enable IPv6 fragmentation stats. + */ +#if !defined IP6_FRAG_STATS || defined __DOXYGEN__ +#define IP6_FRAG_STATS (LWIP_IPV6 && (LWIP_IPV6_FRAG || LWIP_IPV6_REASS)) +#endif + +/** + * MLD6_STATS==1: Enable MLD for IPv6 stats. + */ +#if !defined MLD6_STATS || defined __DOXYGEN__ +#define MLD6_STATS (LWIP_IPV6 && LWIP_IPV6_MLD) +#endif + +/** + * ND6_STATS==1: Enable Neighbor discovery for IPv6 stats. + */ +#if !defined ND6_STATS || defined __DOXYGEN__ +#define ND6_STATS (LWIP_IPV6) +#endif + +/** + * MIB2_STATS==1: Stats for SNMP MIB2. + */ +#if !defined MIB2_STATS || defined __DOXYGEN__ +#define MIB2_STATS 0 +#endif + +#else + +#define LINK_STATS 0 +#define ETHARP_STATS 0 +#define IP_STATS 0 +#define IPFRAG_STATS 0 +#define ICMP_STATS 0 +#define IGMP_STATS 0 +#define UDP_STATS 0 +#define TCP_STATS 0 +#define MEM_STATS 0 +#define MEMP_STATS 0 +#define SYS_STATS 0 +#define LWIP_STATS_DISPLAY 0 +#define IP6_STATS 0 +#define ICMP6_STATS 0 +#define IP6_FRAG_STATS 0 +#define MLD6_STATS 0 +#define ND6_STATS 0 +#define MIB2_STATS 0 + +#endif /* LWIP_STATS */ +/** + * @} + */ + +/* + -------------------------------------- + ---------- Checksum options ---------- + -------------------------------------- +*/ +/** + * @defgroup lwip_opts_checksum Checksum + * @ingroup lwip_opts_infrastructure + * @{ + */ +/** + * LWIP_CHECKSUM_CTRL_PER_NETIF==1: Checksum generation/check can be enabled/disabled + * per netif. + * ATTENTION: if enabled, the CHECKSUM_GEN_* and CHECKSUM_CHECK_* defines must be enabled! + */ +#if !defined LWIP_CHECKSUM_CTRL_PER_NETIF || defined __DOXYGEN__ +#define LWIP_CHECKSUM_CTRL_PER_NETIF 0 +#endif + +/** + * CHECKSUM_GEN_IP==1: Generate checksums in software for outgoing IP packets. + */ +#if !defined CHECKSUM_GEN_IP || defined __DOXYGEN__ +#define CHECKSUM_GEN_IP 1 +#endif + +/** + * CHECKSUM_GEN_UDP==1: Generate checksums in software for outgoing UDP packets. + */ +#if !defined CHECKSUM_GEN_UDP || defined __DOXYGEN__ +#define CHECKSUM_GEN_UDP 1 +#endif + +/** + * CHECKSUM_GEN_TCP==1: Generate checksums in software for outgoing TCP packets. + */ +#if !defined CHECKSUM_GEN_TCP || defined __DOXYGEN__ +#define CHECKSUM_GEN_TCP 1 +#endif + +/** + * CHECKSUM_GEN_ICMP==1: Generate checksums in software for outgoing ICMP packets. + */ +#if !defined CHECKSUM_GEN_ICMP || defined __DOXYGEN__ +#define CHECKSUM_GEN_ICMP 1 +#endif + +/** + * CHECKSUM_GEN_ICMP6==1: Generate checksums in software for outgoing ICMP6 packets. + */ +#if !defined CHECKSUM_GEN_ICMP6 || defined __DOXYGEN__ +#define CHECKSUM_GEN_ICMP6 1 +#endif + +/** + * CHECKSUM_CHECK_IP==1: Check checksums in software for incoming IP packets. + */ +#if !defined CHECKSUM_CHECK_IP || defined __DOXYGEN__ +#define CHECKSUM_CHECK_IP 1 +#endif + +/** + * CHECKSUM_CHECK_UDP==1: Check checksums in software for incoming UDP packets. + */ +#if !defined CHECKSUM_CHECK_UDP || defined __DOXYGEN__ +#define CHECKSUM_CHECK_UDP 1 +#endif + +/** + * CHECKSUM_CHECK_TCP==1: Check checksums in software for incoming TCP packets. + */ +#if !defined CHECKSUM_CHECK_TCP || defined __DOXYGEN__ +#define CHECKSUM_CHECK_TCP 1 +#endif + +/** + * CHECKSUM_CHECK_ICMP==1: Check checksums in software for incoming ICMP packets. + */ +#if !defined CHECKSUM_CHECK_ICMP || defined __DOXYGEN__ +#define CHECKSUM_CHECK_ICMP 1 +#endif + +/** + * CHECKSUM_CHECK_ICMP6==1: Check checksums in software for incoming ICMPv6 packets + */ +#if !defined CHECKSUM_CHECK_ICMP6 || defined __DOXYGEN__ +#define CHECKSUM_CHECK_ICMP6 1 +#endif + +/** + * LWIP_CHECKSUM_ON_COPY==1: Calculate checksum when copying data from + * application buffers to pbufs. + */ +#if !defined LWIP_CHECKSUM_ON_COPY || defined __DOXYGEN__ +#define LWIP_CHECKSUM_ON_COPY 0 +#endif +/** + * @} + */ + +/* + --------------------------------------- + ---------- IPv6 options --------------- + --------------------------------------- +*/ +/** + * @defgroup lwip_opts_ipv6 IPv6 + * @ingroup lwip_opts + * @{ + */ +/** + * LWIP_IPV6==1: Enable IPv6 + */ +#if !defined LWIP_IPV6 || defined __DOXYGEN__ +#define LWIP_IPV6 0 +#endif + +/** + * IPV6_REASS_MAXAGE: Maximum time (in multiples of IP6_REASS_TMR_INTERVAL - so seconds, normally) + * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived + * in this time, the whole packet is discarded. + */ +#if !defined IPV6_REASS_MAXAGE || defined __DOXYGEN__ +#define IPV6_REASS_MAXAGE 60 +#endif + +/** + * LWIP_IPV6_SCOPES==1: Enable support for IPv6 address scopes, ensuring that + * e.g. link-local addresses are really treated as link-local. Disable this + * setting only for single-interface configurations. + * All addresses that have a scope according to the default policy (link-local + * unicast addresses, interface-local and link-local multicast addresses) should + * now have a zone set on them before being passed to the core API, although + * lwIP will currently attempt to select a zone on the caller's behalf when + * necessary. Applications that directly assign IPv6 addresses to interfaces + * (which is NOT recommended) must now ensure that link-local addresses carry + * the netif's zone. See the new ip6_zone.h header file for more information and + * relevant macros. For now it is still possible to turn off scopes support + * through the new LWIP_IPV6_SCOPES option. When upgrading an implementation that + * uses the core API directly, it is highly recommended to enable + * LWIP_IPV6_SCOPES_DEBUG at least for a while, to ensure e.g. proper address + * initialization. + */ +#if !defined LWIP_IPV6_SCOPES || defined __DOXYGEN__ +#define LWIP_IPV6_SCOPES (LWIP_IPV6 && !LWIP_SINGLE_NETIF) +#endif + +/** + * LWIP_IPV6_SCOPES_DEBUG==1: Perform run-time checks to verify that addresses + * are properly zoned (see ip6_zone.h on what that means) where it matters. + * Enabling this setting is highly recommended when upgrading from an existing + * installation that is not yet scope-aware; otherwise it may be too expensive. + */ +#if !defined LWIP_IPV6_SCOPES_DEBUG || defined __DOXYGEN__ +#define LWIP_IPV6_SCOPES_DEBUG 0 +#endif + +/** + * LWIP_IPV6_NUM_ADDRESSES: Number of IPv6 addresses per netif. + */ +#if !defined LWIP_IPV6_NUM_ADDRESSES || defined __DOXYGEN__ +#define LWIP_IPV6_NUM_ADDRESSES 3 +#endif + +/** + * LWIP_IPV6_FORWARD==1: Forward IPv6 packets across netifs + */ +#if !defined LWIP_IPV6_FORWARD || defined __DOXYGEN__ +#define LWIP_IPV6_FORWARD 0 +#endif + +/** + * LWIP_IPV6_FRAG==1: Fragment outgoing IPv6 packets that are too big. + */ +#if !defined LWIP_IPV6_FRAG || defined __DOXYGEN__ +#define LWIP_IPV6_FRAG 1 +#endif + +/** + * LWIP_IPV6_REASS==1: reassemble incoming IPv6 packets that fragmented + */ +#if !defined LWIP_IPV6_REASS || defined __DOXYGEN__ +#define LWIP_IPV6_REASS LWIP_IPV6 +#endif + +/** + * LWIP_IPV6_SEND_ROUTER_SOLICIT==1: Send router solicitation messages during + * network startup. + */ +#if !defined LWIP_IPV6_SEND_ROUTER_SOLICIT || defined __DOXYGEN__ +#define LWIP_IPV6_SEND_ROUTER_SOLICIT LWIP_IPV6 +#endif + +/** + * LWIP_IPV6_AUTOCONFIG==1: Enable stateless address autoconfiguration as per RFC 4862. + */ +#if !defined LWIP_IPV6_AUTOCONFIG || defined __DOXYGEN__ +#define LWIP_IPV6_AUTOCONFIG LWIP_IPV6 +#endif + +/** + * LWIP_IPV6_ADDRESS_LIFETIMES==1: Keep valid and preferred lifetimes for each + * IPv6 address. Required for LWIP_IPV6_AUTOCONFIG. May still be enabled + * otherwise, in which case the application may assign address lifetimes with + * the appropriate macros. Addresses with no lifetime are assumed to be static. + * If this option is disabled, all addresses are assumed to be static. + */ +#if !defined LWIP_IPV6_ADDRESS_LIFETIMES || defined __DOXYGEN__ +#define LWIP_IPV6_ADDRESS_LIFETIMES LWIP_IPV6_AUTOCONFIG +#endif + +/** + * LWIP_IPV6_DUP_DETECT_ATTEMPTS=[0..7]: Number of duplicate address detection attempts. + */ +#if !defined LWIP_IPV6_DUP_DETECT_ATTEMPTS || defined __DOXYGEN__ +#define LWIP_IPV6_DUP_DETECT_ATTEMPTS 1 +#endif +/** + * @} + */ + +/** + * @defgroup lwip_opts_icmp6 ICMP6 + * @ingroup lwip_opts_ipv6 + * @{ + */ +/** + * LWIP_ICMP6==1: Enable ICMPv6 (mandatory per RFC) + */ +#if !defined LWIP_ICMP6 || defined __DOXYGEN__ +#define LWIP_ICMP6 LWIP_IPV6 +#endif + +/** + * LWIP_ICMP6_DATASIZE: bytes from original packet to send back in + * ICMPv6 error messages (0 = default of IP6_MIN_MTU_LENGTH) + * ATTENTION: RFC4443 section 2.4 says IP6_MIN_MTU_LENGTH is a MUST, + * so override this only if you absolutely have to! + */ +#if !defined LWIP_ICMP6_DATASIZE || defined __DOXYGEN__ +#define LWIP_ICMP6_DATASIZE 0 +#endif + +/** + * LWIP_ICMP6_HL: default hop limit for ICMPv6 messages + */ +#if !defined LWIP_ICMP6_HL || defined __DOXYGEN__ +#define LWIP_ICMP6_HL 255 +#endif +/** + * @} + */ + +/** + * @defgroup lwip_opts_mld6 Multicast listener discovery + * @ingroup lwip_opts_ipv6 + * @{ + */ +/** + * LWIP_IPV6_MLD==1: Enable multicast listener discovery protocol. + * If LWIP_IPV6 is enabled but this setting is disabled, the MAC layer must + * indiscriminately pass all inbound IPv6 multicast traffic to lwIP. + */ +#if !defined LWIP_IPV6_MLD || defined __DOXYGEN__ +#define LWIP_IPV6_MLD LWIP_IPV6 +#endif + +/** + * MEMP_NUM_MLD6_GROUP: Max number of IPv6 multicast groups that can be joined. + * There must be enough groups so that each netif can join the solicited-node + * multicast group for each of its local addresses, plus one for MDNS if + * applicable, plus any number of groups to be joined on UDP sockets. + */ +#if !defined MEMP_NUM_MLD6_GROUP || defined __DOXYGEN__ +#define MEMP_NUM_MLD6_GROUP 4 +#endif +/** + * @} + */ + +/** + * @defgroup lwip_opts_nd6 Neighbor discovery + * @ingroup lwip_opts_ipv6 + * @{ + */ +/** + * LWIP_ND6_QUEUEING==1: queue outgoing IPv6 packets while MAC address + * is being resolved. + */ +#if !defined LWIP_ND6_QUEUEING || defined __DOXYGEN__ +#define LWIP_ND6_QUEUEING LWIP_IPV6 +#endif + +/** + * MEMP_NUM_ND6_QUEUE: Max number of IPv6 packets to queue during MAC resolution. + */ +#if !defined MEMP_NUM_ND6_QUEUE || defined __DOXYGEN__ +#define MEMP_NUM_ND6_QUEUE 20 +#endif + +/** + * LWIP_ND6_NUM_NEIGHBORS: Number of entries in IPv6 neighbor cache + */ +#if !defined LWIP_ND6_NUM_NEIGHBORS || defined __DOXYGEN__ +#define LWIP_ND6_NUM_NEIGHBORS 10 +#endif + +/** + * LWIP_ND6_NUM_DESTINATIONS: number of entries in IPv6 destination cache + */ +#if !defined LWIP_ND6_NUM_DESTINATIONS || defined __DOXYGEN__ +#define LWIP_ND6_NUM_DESTINATIONS 10 +#endif + +/** + * LWIP_ND6_NUM_PREFIXES: number of entries in IPv6 on-link prefixes cache + */ +#if !defined LWIP_ND6_NUM_PREFIXES || defined __DOXYGEN__ +#define LWIP_ND6_NUM_PREFIXES 5 +#endif + +/** + * LWIP_ND6_NUM_ROUTERS: number of entries in IPv6 default router cache + */ +#if !defined LWIP_ND6_NUM_ROUTERS || defined __DOXYGEN__ +#define LWIP_ND6_NUM_ROUTERS 3 +#endif + +/** + * LWIP_ND6_MAX_MULTICAST_SOLICIT: max number of multicast solicit messages to send + * (neighbor solicit and router solicit) + */ +#if !defined LWIP_ND6_MAX_MULTICAST_SOLICIT || defined __DOXYGEN__ +#define LWIP_ND6_MAX_MULTICAST_SOLICIT 3 +#endif + +/** + * LWIP_ND6_MAX_UNICAST_SOLICIT: max number of unicast neighbor solicitation messages + * to send during neighbor reachability detection. + */ +#if !defined LWIP_ND6_MAX_UNICAST_SOLICIT || defined __DOXYGEN__ +#define LWIP_ND6_MAX_UNICAST_SOLICIT 3 +#endif + +/** + * Unused: See ND RFC (time in milliseconds). + */ +#if !defined LWIP_ND6_MAX_ANYCAST_DELAY_TIME || defined __DOXYGEN__ +#define LWIP_ND6_MAX_ANYCAST_DELAY_TIME 1000 +#endif + +/** + * Unused: See ND RFC + */ +#if !defined LWIP_ND6_MAX_NEIGHBOR_ADVERTISEMENT || defined __DOXYGEN__ +#define LWIP_ND6_MAX_NEIGHBOR_ADVERTISEMENT 3 +#endif + +/** + * LWIP_ND6_REACHABLE_TIME: default neighbor reachable time (in milliseconds). + * May be updated by router advertisement messages. + */ +#if !defined LWIP_ND6_REACHABLE_TIME || defined __DOXYGEN__ +#define LWIP_ND6_REACHABLE_TIME 30000 +#endif + +/** + * LWIP_ND6_RETRANS_TIMER: default retransmission timer for solicitation messages + */ +#if !defined LWIP_ND6_RETRANS_TIMER || defined __DOXYGEN__ +#define LWIP_ND6_RETRANS_TIMER 1000 +#endif + +/** + * LWIP_ND6_DELAY_FIRST_PROBE_TIME: Delay before first unicast neighbor solicitation + * message is sent, during neighbor reachability detection. + */ +#if !defined LWIP_ND6_DELAY_FIRST_PROBE_TIME || defined __DOXYGEN__ +#define LWIP_ND6_DELAY_FIRST_PROBE_TIME 5000 +#endif + +/** + * LWIP_ND6_ALLOW_RA_UPDATES==1: Allow Router Advertisement messages to update + * Reachable time and retransmission timers, and netif MTU. + */ +#if !defined LWIP_ND6_ALLOW_RA_UPDATES || defined __DOXYGEN__ +#define LWIP_ND6_ALLOW_RA_UPDATES 1 +#endif + +/** + * LWIP_ND6_TCP_REACHABILITY_HINTS==1: Allow TCP to provide Neighbor Discovery + * with reachability hints for connected destinations. This helps avoid sending + * unicast neighbor solicitation messages. + */ +#if !defined LWIP_ND6_TCP_REACHABILITY_HINTS || defined __DOXYGEN__ +#define LWIP_ND6_TCP_REACHABILITY_HINTS 1 +#endif + +/** + * LWIP_ND6_RDNSS_MAX_DNS_SERVERS > 0: Use IPv6 Router Advertisement Recursive + * DNS Server Option (as per RFC 6106) to copy a defined maximum number of DNS + * servers to the DNS module. + */ +#if !defined LWIP_ND6_RDNSS_MAX_DNS_SERVERS || defined __DOXYGEN__ +#define LWIP_ND6_RDNSS_MAX_DNS_SERVERS 0 +#endif +/** + * @} + */ + +/** + * @defgroup lwip_opts_dhcpv6 DHCPv6 + * @ingroup lwip_opts_ipv6 + * @{ + */ +/** + * LWIP_IPV6_DHCP6==1: enable DHCPv6 stateful/stateless address autoconfiguration. + */ +#if !defined LWIP_IPV6_DHCP6 || defined __DOXYGEN__ +#define LWIP_IPV6_DHCP6 0 +#endif + +/** + * LWIP_IPV6_DHCP6_STATEFUL==1: enable DHCPv6 stateful address autoconfiguration. + * (not supported, yet!) + */ +#if !defined LWIP_IPV6_DHCP6_STATEFUL || defined __DOXYGEN__ +#define LWIP_IPV6_DHCP6_STATEFUL 0 +#endif + +/** + * LWIP_IPV6_DHCP6_STATELESS==1: enable DHCPv6 stateless address autoconfiguration. + */ +#if !defined LWIP_IPV6_DHCP6_STATELESS || defined __DOXYGEN__ +#define LWIP_IPV6_DHCP6_STATELESS LWIP_IPV6_DHCP6 +#endif + +/** + * LWIP_DHCP6_GETS_NTP==1: Request NTP servers via DHCPv6. For each + * response packet, a callback is called, which has to be provided by the port: + * void dhcp6_set_ntp_servers(u8_t num_ntp_servers, ip_addr_t* ntp_server_addrs); +*/ +#if !defined LWIP_DHCP6_GET_NTP_SRV || defined __DOXYGEN__ +#define LWIP_DHCP6_GET_NTP_SRV 0 +#endif + +/** + * The maximum of NTP servers requested + */ +#if !defined LWIP_DHCP6_MAX_NTP_SERVERS || defined __DOXYGEN__ +#define LWIP_DHCP6_MAX_NTP_SERVERS 1 +#endif + +/** + * LWIP_DHCP6_MAX_DNS_SERVERS > 0: Request DNS servers via DHCPv6. + * DNS servers received in the response are passed to DNS via @ref dns_setserver() + * (up to the maximum limit defined here). + */ +#if !defined LWIP_DHCP6_MAX_DNS_SERVERS || defined __DOXYGEN__ +#define LWIP_DHCP6_MAX_DNS_SERVERS DNS_MAX_SERVERS +#endif +/** + * @} + */ + +/* + --------------------------------------- + ---------- Hook options --------------- + --------------------------------------- +*/ + +/** + * @defgroup lwip_opts_hooks Hooks + * @ingroup lwip_opts_infrastructure + * Hooks are undefined by default, define them to a function if you need them. + * @{ + */ + +/** + * LWIP_HOOK_FILENAME: Custom filename to #include in files that provide hooks. + * Declare your hook function prototypes in there, you may also #include all headers + * providing data types that are need in this file. + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_FILENAME "path/to/my/lwip_hooks.h" +#endif + +/** + * LWIP_HOOK_TCP_ISN: + * Hook for generation of the Initial Sequence Number (ISN) for a new TCP + * connection. The default lwIP ISN generation algorithm is very basic and may + * allow for TCP spoofing attacks. This hook provides the means to implement + * the standardized ISN generation algorithm from RFC 6528 (see contrib/adons/tcp_isn), + * or any other desired algorithm as a replacement. + * Called from tcp_connect() and tcp_listen_input() when an ISN is needed for + * a new TCP connection, if TCP support (@ref LWIP_TCP) is enabled.<br> + * Signature:\code{.c} + * u32_t my_hook_tcp_isn(const ip_addr_t* local_ip, u16_t local_port, const ip_addr_t* remote_ip, u16_t remote_port); + * \endcode + * - it may be necessary to use "struct ip_addr" (ip4_addr, ip6_addr) instead of "ip_addr_t" in function declarations<br> + * Arguments: + * - local_ip: pointer to the local IP address of the connection + * - local_port: local port number of the connection (host-byte order) + * - remote_ip: pointer to the remote IP address of the connection + * - remote_port: remote port number of the connection (host-byte order)<br> + * Return value: + * - the 32-bit Initial Sequence Number to use for the new TCP connection. + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_TCP_ISN(local_ip, local_port, remote_ip, remote_port) +#endif + +/** + * LWIP_HOOK_TCP_INPACKET_PCB: + * Hook for intercepting incoming packets before they are passed to a pcb. This + * allows updating some state or even dropping a packet. + * Signature:\code{.c} + * err_t my_hook_tcp_inpkt(struct tcp_pcb *pcb, struct tcp_hdr *hdr, u16_t optlen, u16_t opt1len, u8_t *opt2, struct pbuf *p); + * \endcode + * Arguments: + * - pcb: tcp_pcb selected for input of this packet (ATTENTION: this may be + * struct tcp_pcb_listen if pcb->state == LISTEN) + * - hdr: pointer to tcp header (ATTENTION: tcp options may not be in one piece!) + * - optlen: tcp option length + * - opt1len: tcp option length 1st part + * - opt2: if this is != NULL, tcp options are split among 2 pbufs. In that case, + * options start at right after the tcp header ('(u8_t*)(hdr + 1)') for + * the first 'opt1len' bytes and the rest starts at 'opt2'. opt2len can + * be simply calculated: 'opt2len = optlen - opt1len;' + * - p: input packet, p->payload points to application data (that's why tcp hdr + * and options are passed in separately) + * Return value: + * - ERR_OK: continue input of this packet as normal + * - != ERR_OK: drop this packet for input (don't continue input processing) + * + * ATTENTION: don't call any tcp api functions that might change tcp state (pcb + * state or any pcb lists) from this callback! + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_TCP_INPACKET_PCB(pcb, hdr, optlen, opt1len, opt2, p) +#endif + +/** + * LWIP_HOOK_TCP_OUT_TCPOPT_LENGTH: + * Hook for increasing the size of the options allocated with a tcp header. + * Together with LWIP_HOOK_TCP_OUT_ADD_TCPOPTS, this can be used to add custom + * options to outgoing tcp segments. + * Signature:\code{.c} + * u8_t my_hook_tcp_out_tcpopt_length(const struct tcp_pcb *pcb, u8_t internal_option_length); + * \endcode + * Arguments: + * - pcb: tcp_pcb that transmits (ATTENTION: this may be NULL or + * struct tcp_pcb_listen if pcb->state == LISTEN) + * - internal_option_length: tcp option length used by the stack internally + * Return value: + * - a number of bytes to allocate for tcp options (internal_option_length <= ret <= 40) + * + * ATTENTION: don't call any tcp api functions that might change tcp state (pcb + * state or any pcb lists) from this callback! + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_TCP_OUT_TCPOPT_LENGTH(pcb, internal_len) +#endif + +/** + * LWIP_HOOK_TCP_OUT_ADD_TCPOPTS: + * Hook for adding custom options to outgoing tcp segments. + * Space for these custom options has to be reserved via LWIP_HOOK_TCP_OUT_TCPOPT_LENGTH. + * Signature:\code{.c} + * u32_t *my_hook_tcp_out_add_tcpopts(struct pbuf *p, struct tcp_hdr *hdr, const struct tcp_pcb *pcb, u32_t *opts); + * \endcode + * Arguments: + * - p: output packet, p->payload pointing to tcp header, data follows + * - hdr: tcp header + * - pcb: tcp_pcb that transmits (ATTENTION: this may be NULL or + * struct tcp_pcb_listen if pcb->state == LISTEN) + * - opts: pointer where to add the custom options (there may already be options + * between the header and these) + * Return value: + * - pointer pointing directly after the inserted options + * + * ATTENTION: don't call any tcp api functions that might change tcp state (pcb + * state or any pcb lists) from this callback! + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_TCP_OUT_ADD_TCPOPTS(p, hdr, pcb, opts) +#endif + +/** + * LWIP_HOOK_IP4_INPUT(pbuf, input_netif): + * Called from ip_input() (IPv4) + * Signature:\code{.c} + * int my_hook(struct pbuf *pbuf, struct netif *input_netif); + * \endcode + * Arguments: + * - pbuf: received struct pbuf passed to ip_input() + * - input_netif: struct netif on which the packet has been received + * Return values: + * - 0: Hook has not consumed the packet, packet is processed as normal + * - != 0: Hook has consumed the packet. + * If the hook consumed the packet, 'pbuf' is in the responsibility of the hook + * (i.e. free it when done). + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_IP4_INPUT(pbuf, input_netif) +#endif + +/** + * LWIP_HOOK_IP4_ROUTE(dest): + * Called from ip_route() (IPv4) + * Signature:\code{.c} + * struct netif *my_hook(const ip4_addr_t *dest); + * \endcode + * Arguments: + * - dest: destination IPv4 address + * Returns values: + * - the destination netif + * - NULL if no destination netif is found. In that case, ip_route() continues as normal. + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_IP4_ROUTE() +#endif + +/** + * LWIP_HOOK_IP4_ROUTE_SRC(src, dest): + * Source-based routing for IPv4 - called from ip_route() (IPv4) + * Signature:\code{.c} + * struct netif *my_hook(const ip4_addr_t *src, const ip4_addr_t *dest); + * \endcode + * Arguments: + * - src: local/source IPv4 address + * - dest: destination IPv4 address + * Returns values: + * - the destination netif + * - NULL if no destination netif is found. In that case, ip_route() continues as normal. + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_IP4_ROUTE_SRC(src, dest) +#endif + +/** + * LWIP_HOOK_IP4_CANFORWARD(src, dest): + * Check if an IPv4 can be forwarded - called from: + * ip4_input() -> ip4_forward() -> ip4_canforward() (IPv4) + * - source address is available via ip4_current_src_addr() + * - calling an output function in this context (e.g. multicast router) is allowed + * Signature:\code{.c} + * int my_hook(struct pbuf *p, u32_t dest_addr_hostorder); + * \endcode + * Arguments: + * - p: packet to forward + * - dest: destination IPv4 address + * Returns values: + * - 1: forward + * - 0: don't forward + * - -1: no decision. In that case, ip4_canforward() continues as normal. + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_IP4_CANFORWARD(src, dest) +#endif + +/** + * LWIP_HOOK_ETHARP_GET_GW(netif, dest): + * Called from etharp_output() (IPv4) + * Signature:\code{.c} + * const ip4_addr_t *my_hook(struct netif *netif, const ip4_addr_t *dest); + * \endcode + * Arguments: + * - netif: the netif used for sending + * - dest: the destination IPv4 address + * Return values: + * - the IPv4 address of the gateway to handle the specified destination IPv4 address + * - NULL, in which case the netif's default gateway is used + * + * The returned address MUST be directly reachable on the specified netif! + * This function is meant to implement advanced IPv4 routing together with + * LWIP_HOOK_IP4_ROUTE(). The actual routing/gateway table implementation is + * not part of lwIP but can e.g. be hidden in the netif's state argument. +*/ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_ETHARP_GET_GW(netif, dest) +#endif + +/** + * LWIP_HOOK_IP6_INPUT(pbuf, input_netif): + * Called from ip6_input() (IPv6) + * Signature:\code{.c} + * int my_hook(struct pbuf *pbuf, struct netif *input_netif); + * \endcode + * Arguments: + * - pbuf: received struct pbuf passed to ip6_input() + * - input_netif: struct netif on which the packet has been received + * Return values: + * - 0: Hook has not consumed the packet, packet is processed as normal + * - != 0: Hook has consumed the packet. + * If the hook consumed the packet, 'pbuf' is in the responsibility of the hook + * (i.e. free it when done). + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_IP6_INPUT(pbuf, input_netif) +#endif + +/** + * LWIP_HOOK_IP6_ROUTE(src, dest): + * Called from ip_route() (IPv6) + * Signature:\code{.c} + * struct netif *my_hook(const ip6_addr_t *dest, const ip6_addr_t *src); + * \endcode + * Arguments: + * - src: source IPv6 address + * - dest: destination IPv6 address + * Return values: + * - the destination netif + * - NULL if no destination netif is found. In that case, ip6_route() continues as normal. + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_IP6_ROUTE(src, dest) +#endif + +/** + * LWIP_HOOK_ND6_GET_GW(netif, dest): + * Called from nd6_get_next_hop_entry() (IPv6) + * Signature:\code{.c} + * const ip6_addr_t *my_hook(struct netif *netif, const ip6_addr_t *dest); + * \endcode + * Arguments: + * - netif: the netif used for sending + * - dest: the destination IPv6 address + * Return values: + * - the IPv6 address of the next hop to handle the specified destination IPv6 address + * - NULL, in which case a NDP-discovered router is used instead + * + * The returned address MUST be directly reachable on the specified netif! + * This function is meant to implement advanced IPv6 routing together with + * LWIP_HOOK_IP6_ROUTE(). The actual routing/gateway table implementation is + * not part of lwIP but can e.g. be hidden in the netif's state argument. +*/ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_ND6_GET_GW(netif, dest) +#endif + +/** + * LWIP_HOOK_VLAN_CHECK(netif, eth_hdr, vlan_hdr): + * Called from ethernet_input() if VLAN support is enabled + * Signature:\code{.c} + * int my_hook(struct netif *netif, struct eth_hdr *eth_hdr, struct eth_vlan_hdr *vlan_hdr); + * \endcode + * Arguments: + * - netif: struct netif on which the packet has been received + * - eth_hdr: struct eth_hdr of the packet + * - vlan_hdr: struct eth_vlan_hdr of the packet + * Return values: + * - 0: Packet must be dropped. + * - != 0: Packet must be accepted. + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_VLAN_CHECK(netif, eth_hdr, vlan_hdr) +#endif + +/** + * LWIP_HOOK_VLAN_SET: + * Hook can be used to set prio_vid field of vlan_hdr. If you need to store data + * on per-netif basis to implement this callback, see @ref netif_cd. + * Called from ethernet_output() if VLAN support (@ref ETHARP_SUPPORT_VLAN) is enabled.<br> + * Signature:\code{.c} + * s32_t my_hook_vlan_set(struct netif* netif, struct pbuf* pbuf, const struct eth_addr* src, const struct eth_addr* dst, u16_t eth_type); + * \endcode + * Arguments: + * - netif: struct netif that the packet will be sent through + * - p: struct pbuf packet to be sent + * - src: source eth address + * - dst: destination eth address + * - eth_type: ethernet type to packet to be sent<br> + * + * + * Return values: + * - &lt;0: Packet shall not contain VLAN header. + * - 0 &lt;= return value &lt;= 0xFFFF: Packet shall contain VLAN header. Return value is prio_vid in host byte order. + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_VLAN_SET(netif, p, src, dst, eth_type) +#endif + +/** + * LWIP_HOOK_MEMP_AVAILABLE(memp_t_type): + * Called from memp_free() when a memp pool was empty and an item is now available + * Signature:\code{.c} + * void my_hook(memp_t type); + * \endcode + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_MEMP_AVAILABLE(memp_t_type) +#endif + +/** + * LWIP_HOOK_UNKNOWN_ETH_PROTOCOL(pbuf, netif): + * Called from ethernet_input() when an unknown eth type is encountered. + * Signature:\code{.c} + * err_t my_hook(struct pbuf* pbuf, struct netif* netif); + * \endcode + * Arguments: + * - p: rx packet with unknown eth type + * - netif: netif on which the packet has been received + * Return values: + * - ERR_OK if packet is accepted (hook function now owns the pbuf) + * - any error code otherwise (pbuf is freed) + * + * Payload points to ethernet header! + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_UNKNOWN_ETH_PROTOCOL(pbuf, netif) +#endif + +/** + * LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, state, msg, msg_type, options_len_ptr): + * Called from various dhcp functions when sending a DHCP message. + * This hook is called just before the DHCP message trailer is added, so the + * options are at the end of a DHCP message. + * Signature:\code{.c} + * void my_hook(struct netif *netif, struct dhcp *dhcp, u8_t state, struct dhcp_msg *msg, + * u8_t msg_type, u16_t *options_len_ptr); + * \endcode + * Arguments: + * - netif: struct netif that the packet will be sent through + * - dhcp: struct dhcp on that netif + * - state: current dhcp state (dhcp_state_enum_t as an u8_t) + * - msg: struct dhcp_msg that will be sent + * - msg_type: dhcp message type to be sent (u8_t) + * - options_len_ptr: pointer to the current length of options in the dhcp_msg "msg" + * (must be increased when options are added!) + * + * Options need to appended like this: + * LWIP_ASSERT("dhcp option overflow", *options_len_ptr + option_len + 2 <= DHCP_OPTIONS_LEN); + * msg->options[(*options_len_ptr)++] = &lt;option_number&gt;; + * msg->options[(*options_len_ptr)++] = &lt;option_len&gt;; + * msg->options[(*options_len_ptr)++] = &lt;option_bytes&gt;; + * [...] + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, state, msg, msg_type, options_len_ptr) +#endif + +/** + * LWIP_HOOK_DHCP_PARSE_OPTION(netif, dhcp, state, msg, msg_type, option, len, pbuf, option_value_offset): + * Called from dhcp_parse_reply when receiving a DHCP message. + * This hook is called for every option in the received message that is not handled internally. + * Signature:\code{.c} + * void my_hook(struct netif *netif, struct dhcp *dhcp, u8_t state, struct dhcp_msg *msg, + * u8_t msg_type, u8_t option, u8_t option_len, struct pbuf *pbuf, u16_t option_value_offset); + * \endcode + * Arguments: + * - netif: struct netif that the packet will be sent through + * - dhcp: struct dhcp on that netif + * - state: current dhcp state (dhcp_state_enum_t as an u8_t) + * - msg: struct dhcp_msg that was received + * - msg_type: dhcp message type received (u8_t, ATTENTION: only valid after + * the message type option has been parsed!) + * - option: option value (u8_t) + * - len: option data length (u8_t) + * - pbuf: pbuf where option data is contained + * - option_value_offset: offset in pbuf where option data begins + * + * A nice way to get the option contents is pbuf_get_contiguous(): + * u8_t buf[32]; + * u8_t *ptr = (u8_t*)pbuf_get_contiguous(p, buf, sizeof(buf), LWIP_MIN(option_len, sizeof(buf)), offset); + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_DHCP_PARSE_OPTION(netif, dhcp, state, msg, msg_type, option, len, pbuf, offset) +#endif + +/** + * LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, state, msg, msg_type, options_len_ptr, max_len): + * Called from various dhcp6 functions when sending a DHCP6 message. + * This hook is called just before the DHCP6 message is sent, so the + * options are at the end of a DHCP6 message. + * Signature:\code{.c} + * void my_hook(struct netif *netif, struct dhcp6 *dhcp, u8_t state, struct dhcp6_msg *msg, + * u8_t msg_type, u16_t *options_len_ptr); + * \endcode + * Arguments: + * - netif: struct netif that the packet will be sent through + * - dhcp6: struct dhcp6 on that netif + * - state: current dhcp6 state (dhcp6_state_enum_t as an u8_t) + * - msg: struct dhcp6_msg that will be sent + * - msg_type: dhcp6 message type to be sent (u8_t) + * - options_len_ptr: pointer to the current length of options in the dhcp6_msg "msg" + * (must be increased when options are added!) + * + * Options need to appended like this: + * u8_t *options = (u8_t *)(msg + 1); + * LWIP_ASSERT("dhcp option overflow", sizeof(struct dhcp6_msg) + *options_len_ptr + newoptlen <= max_len); + * options[(*options_len_ptr)++] = &lt;option_data&gt;; + * [...] + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, state, msg, msg_type, options_len_ptr, max_len) +#endif + +/** + * LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, err) + * Called from socket API to implement setsockopt() for options not provided by lwIP. + * Core lock is held when this hook is called. + * Signature:\code{.c} + * int my_hook(int s, struct lwip_sock *sock, int level, int optname, const void *optval, socklen_t optlen, int *err) + * \endcode + * Arguments: + * - s: socket file descriptor + * - sock: internal socket descriptor (see lwip/priv/sockets_priv.h) + * - level: protocol level at which the option resides + * - optname: option to set + * - optval: value to set + * - optlen: size of optval + * - err: output error + * Return values: + * - 0: Hook has not consumed the option, code continues as normal (to internal options) + * - != 0: Hook has consumed the option, 'err' is returned + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, err) +#endif + +/** + * LWIP_HOOK_SOCKETS_GETSOCKOPT(s, sock, level, optname, optval, optlen, err) + * Called from socket API to implement getsockopt() for options not provided by lwIP. + * Core lock is held when this hook is called. + * Signature:\code{.c} + * int my_hook(int s, struct lwip_sock *sock, int level, int optname, void *optval, socklen_t *optlen, int *err) + * \endcode + * Arguments: + * - s: socket file descriptor + * - sock: internal socket descriptor (see lwip/priv/sockets_priv.h) + * - level: protocol level at which the option resides + * - optname: option to get + * - optval: value to get + * - optlen: size of optval + * - err: output error + * Return values: + * - 0: Hook has not consumed the option, code continues as normal (to internal options) + * - != 0: Hook has consumed the option, 'err' is returned + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_SOCKETS_GETSOCKOPT(s, sock, level, optname, optval, optlen, err) +#endif + +/** + * LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE(name, addr, addrtype, err) + * Called from netconn APIs (not usable with callback apps) allowing an + * external DNS resolver (which uses sequential API) to handle the query. + * Signature:\code{.c} + * int my_hook(const char *name, ip_addr_t *addr, u8_t addrtype, err_t *err) + * \endcode + * Arguments: + * - name: hostname to resolve + * - addr: output host address + * - addrtype: type of address to query + * - err: output error + * Return values: + * - 0: Hook has not consumed hostname query, query continues into DNS module + * - != 0: Hook has consumed the query + * + * err must also be checked to determine if the hook consumed the query, but + * the query failed + */ +#ifdef __DOXYGEN__ +#define LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE(name, addr, addrtype, err) +#endif +/** + * @} + */ + +/* + --------------------------------------- + ---------- Debugging options ---------- + --------------------------------------- +*/ +/** + * @defgroup lwip_opts_debugmsg Debug messages + * @ingroup lwip_opts_debug + * @{ + */ +/** + * LWIP_DBG_MIN_LEVEL: After masking, the value of the debug is + * compared against this value. If it is smaller, then debugging + * messages are written. + * @see debugging_levels + */ +#if !defined LWIP_DBG_MIN_LEVEL || defined __DOXYGEN__ +#define LWIP_DBG_MIN_LEVEL LWIP_DBG_LEVEL_ALL +#endif + +/** + * LWIP_DBG_TYPES_ON: A mask that can be used to globally enable/disable + * debug messages of certain types. + * @see debugging_levels + */ +#if !defined LWIP_DBG_TYPES_ON || defined __DOXYGEN__ +#define LWIP_DBG_TYPES_ON LWIP_DBG_ON +#endif + +/** + * ETHARP_DEBUG: Enable debugging in etharp.c. + */ +#if !defined ETHARP_DEBUG || defined __DOXYGEN__ +#define ETHARP_DEBUG LWIP_DBG_OFF +#endif + +/** + * NETIF_DEBUG: Enable debugging in netif.c. + */ +#if !defined NETIF_DEBUG || defined __DOXYGEN__ +#define NETIF_DEBUG LWIP_DBG_OFF +#endif + +/** + * PBUF_DEBUG: Enable debugging in pbuf.c. + */ +#if !defined PBUF_DEBUG || defined __DOXYGEN__ +#define PBUF_DEBUG LWIP_DBG_OFF +#endif + +/** + * API_LIB_DEBUG: Enable debugging in api_lib.c. + */ +#if !defined API_LIB_DEBUG || defined __DOXYGEN__ +#define API_LIB_DEBUG LWIP_DBG_OFF +#endif + +/** + * API_MSG_DEBUG: Enable debugging in api_msg.c. + */ +#if !defined API_MSG_DEBUG || defined __DOXYGEN__ +#define API_MSG_DEBUG LWIP_DBG_OFF +#endif + +/** + * SOCKETS_DEBUG: Enable debugging in sockets.c. + */ +#if !defined SOCKETS_DEBUG || defined __DOXYGEN__ +#define SOCKETS_DEBUG LWIP_DBG_OFF +#endif + +/** + * ICMP_DEBUG: Enable debugging in icmp.c. + */ +#if !defined ICMP_DEBUG || defined __DOXYGEN__ +#define ICMP_DEBUG LWIP_DBG_OFF +#endif + +/** + * IGMP_DEBUG: Enable debugging in igmp.c. + */ +#if !defined IGMP_DEBUG || defined __DOXYGEN__ +#define IGMP_DEBUG LWIP_DBG_OFF +#endif + +/** + * INET_DEBUG: Enable debugging in inet.c. + */ +#if !defined INET_DEBUG || defined __DOXYGEN__ +#define INET_DEBUG LWIP_DBG_OFF +#endif + +/** + * IP_DEBUG: Enable debugging for IP. + */ +#if !defined IP_DEBUG || defined __DOXYGEN__ +#define IP_DEBUG LWIP_DBG_OFF +#endif + +/** + * IP_REASS_DEBUG: Enable debugging in ip_frag.c for both frag & reass. + */ +#if !defined IP_REASS_DEBUG || defined __DOXYGEN__ +#define IP_REASS_DEBUG LWIP_DBG_OFF +#endif + +/** + * RAW_DEBUG: Enable debugging in raw.c. + */ +#if !defined RAW_DEBUG || defined __DOXYGEN__ +#define RAW_DEBUG LWIP_DBG_OFF +#endif + +/** + * MEM_DEBUG: Enable debugging in mem.c. + */ +#if !defined MEM_DEBUG || defined __DOXYGEN__ +#define MEM_DEBUG LWIP_DBG_OFF +#endif + +/** + * MEMP_DEBUG: Enable debugging in memp.c. + */ +#if !defined MEMP_DEBUG || defined __DOXYGEN__ +#define MEMP_DEBUG LWIP_DBG_OFF +#endif + +/** + * SYS_DEBUG: Enable debugging in sys.c. + */ +#if !defined SYS_DEBUG || defined __DOXYGEN__ +#define SYS_DEBUG LWIP_DBG_OFF +#endif + +/** + * TIMERS_DEBUG: Enable debugging in timers.c. + */ +#if !defined TIMERS_DEBUG || defined __DOXYGEN__ +#define TIMERS_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_DEBUG: Enable debugging for TCP. + */ +#if !defined TCP_DEBUG || defined __DOXYGEN__ +#define TCP_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_INPUT_DEBUG: Enable debugging in tcp_in.c for incoming debug. + */ +#if !defined TCP_INPUT_DEBUG || defined __DOXYGEN__ +#define TCP_INPUT_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_FR_DEBUG: Enable debugging in tcp_in.c for fast retransmit. + */ +#if !defined TCP_FR_DEBUG || defined __DOXYGEN__ +#define TCP_FR_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_RTO_DEBUG: Enable debugging in TCP for retransmit + * timeout. + */ +#if !defined TCP_RTO_DEBUG || defined __DOXYGEN__ +#define TCP_RTO_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_CWND_DEBUG: Enable debugging for TCP congestion window. + */ +#if !defined TCP_CWND_DEBUG || defined __DOXYGEN__ +#define TCP_CWND_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_WND_DEBUG: Enable debugging in tcp_in.c for window updating. + */ +#if !defined TCP_WND_DEBUG || defined __DOXYGEN__ +#define TCP_WND_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_OUTPUT_DEBUG: Enable debugging in tcp_out.c output functions. + */ +#if !defined TCP_OUTPUT_DEBUG || defined __DOXYGEN__ +#define TCP_OUTPUT_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_RST_DEBUG: Enable debugging for TCP with the RST message. + */ +#if !defined TCP_RST_DEBUG || defined __DOXYGEN__ +#define TCP_RST_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCP_QLEN_DEBUG: Enable debugging for TCP queue lengths. + */ +#if !defined TCP_QLEN_DEBUG || defined __DOXYGEN__ +#define TCP_QLEN_DEBUG LWIP_DBG_OFF +#endif + +/** + * UDP_DEBUG: Enable debugging in UDP. + */ +#if !defined UDP_DEBUG || defined __DOXYGEN__ +#define UDP_DEBUG LWIP_DBG_OFF +#endif + +/** + * TCPIP_DEBUG: Enable debugging in tcpip.c. + */ +#if !defined TCPIP_DEBUG || defined __DOXYGEN__ +#define TCPIP_DEBUG LWIP_DBG_OFF +#endif + +/** + * SLIP_DEBUG: Enable debugging in slipif.c. + */ +#if !defined SLIP_DEBUG || defined __DOXYGEN__ +#define SLIP_DEBUG LWIP_DBG_OFF +#endif + +/** + * DHCP_DEBUG: Enable debugging in dhcp.c. + */ +#if !defined DHCP_DEBUG || defined __DOXYGEN__ +#define DHCP_DEBUG LWIP_DBG_OFF +#endif + +/** + * AUTOIP_DEBUG: Enable debugging in autoip.c. + */ +#if !defined AUTOIP_DEBUG || defined __DOXYGEN__ +#define AUTOIP_DEBUG LWIP_DBG_OFF +#endif + +/** + * ACD_DEBUG: Enable debugging in acd.c. + */ +#if !defined ACD_DEBUG || defined __DOXYGEN__ +#define ACD_DEBUG LWIP_DBG_OFF +#endif + +/** + * DNS_DEBUG: Enable debugging for DNS. + */ +#if !defined DNS_DEBUG || defined __DOXYGEN__ +#define DNS_DEBUG LWIP_DBG_OFF +#endif + +/** + * IP6_DEBUG: Enable debugging for IPv6. + */ +#if !defined IP6_DEBUG || defined __DOXYGEN__ +#define IP6_DEBUG LWIP_DBG_OFF +#endif + +/** + * DHCP6_DEBUG: Enable debugging in dhcp6.c. + */ +#if !defined DHCP6_DEBUG || defined __DOXYGEN__ +#define DHCP6_DEBUG LWIP_DBG_OFF +#endif +/** + * @} + */ + +/** + * LWIP_TESTMODE: Changes to make unit test possible + */ +#if !defined LWIP_TESTMODE +#define LWIP_TESTMODE 0 +#endif + +/* + -------------------------------------------------- + ---------- Performance tracking options ---------- + -------------------------------------------------- +*/ +/** + * @defgroup lwip_opts_perf Performance + * @ingroup lwip_opts_debug + * @{ + */ +/** + * LWIP_PERF: Enable performance testing for lwIP + * (if enabled, arch/perf.h is included) + */ +#if !defined LWIP_PERF || defined __DOXYGEN__ +#define LWIP_PERF 0 +#endif +/** + * @} + */ + +#endif /* LWIP_HDR_OPT_H */ diff --git a/lib/lwip/include/lwip/pbuf.h b/lib/lwip/include/lwip/pbuf.h new file mode 100644 index 0000000000..5a4fc88b37 --- /dev/null +++ b/lib/lwip/include/lwip/pbuf.h @@ -0,0 +1,326 @@ +/** + * @file + * pbuf API + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#ifndef LWIP_HDR_PBUF_H +#define LWIP_HDR_PBUF_H + +#include "lwip/opt.h" +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** LWIP_SUPPORT_CUSTOM_PBUF==1: Custom pbufs behave much like their pbuf type + * but they are allocated by external code (initialised by calling + * pbuf_alloced_custom()) and when pbuf_free gives up their last reference, they + * are freed by calling pbuf_custom->custom_free_function(). + * Currently, the pbuf_custom code is only needed for one specific configuration + * of IP_FRAG, unless required by external driver/application code. */ +#ifndef LWIP_SUPPORT_CUSTOM_PBUF +#define LWIP_SUPPORT_CUSTOM_PBUF ((IP_FRAG && !LWIP_NETIF_TX_SINGLE_PBUF) || (LWIP_IPV6 && LWIP_IPV6_FRAG)) +#endif + +/** @ingroup pbuf + * PBUF_NEEDS_COPY(p): return a boolean value indicating whether the given + * pbuf needs to be copied in order to be kept around beyond the current call + * stack without risking being corrupted. The default setting provides safety: + * it will make a copy iof any pbuf chain that does not consist entirely of + * PBUF_ROM type pbufs. For setups with zero-copy support, it may be redefined + * to evaluate to true in all cases, for example. However, doing so also has an + * effect on the application side: any buffers that are *not* copied must also + * *not* be reused by the application after passing them to lwIP. For example, + * when setting PBUF_NEEDS_COPY to (0), after using udp_send() with a PBUF_RAM + * pbuf, the application must free the pbuf immediately, rather than reusing it + * for other purposes. For more background information on this, see tasks #6735 + * and #7896, and bugs #11400 and #49914. */ +#ifndef PBUF_NEEDS_COPY +#define PBUF_NEEDS_COPY(p) ((p)->type_internal & PBUF_TYPE_FLAG_DATA_VOLATILE) +#endif /* PBUF_NEEDS_COPY */ + +/* @todo: We need a mechanism to prevent wasting memory in every pbuf + (TCP vs. UDP, IPv4 vs. IPv6: UDP/IPv4 packets may waste up to 28 bytes) */ + +#define PBUF_TRANSPORT_HLEN 20 +#if LWIP_IPV6 +#define PBUF_IP_HLEN 40 +#else +#define PBUF_IP_HLEN 20 +#endif + +/** + * @ingroup pbuf + * Enumeration of pbuf layers + */ +typedef enum { + /** Includes spare room for transport layer header, e.g. UDP header. + * Use this if you intend to pass the pbuf to functions like udp_send(). + */ + PBUF_TRANSPORT = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN, + /** Includes spare room for IP header. + * Use this if you intend to pass the pbuf to functions like raw_send(). + */ + PBUF_IP = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN, + /** Includes spare room for link layer header (ethernet header). + * Use this if you intend to pass the pbuf to functions like ethernet_output(). + * @see PBUF_LINK_HLEN + */ + PBUF_LINK = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN, + /** Includes spare room for additional encapsulation header before ethernet + * headers (e.g. 802.11). + * Use this if you intend to pass the pbuf to functions like netif->linkoutput(). + * @see PBUF_LINK_ENCAPSULATION_HLEN + */ + PBUF_RAW_TX = PBUF_LINK_ENCAPSULATION_HLEN, + /** Use this for input packets in a netif driver when calling netif->input() + * in the most common case - ethernet-layer netif driver. */ + PBUF_RAW = 0 +} pbuf_layer; + + +/* Base flags for pbuf_type definitions: */ + +/** Indicates that the payload directly follows the struct pbuf. + * This makes @ref pbuf_header work in both directions. */ +#define PBUF_TYPE_FLAG_STRUCT_DATA_CONTIGUOUS 0x80 +/** Indicates the data stored in this pbuf can change. If this pbuf needs + * to be queued, it must be copied/duplicated. */ +#define PBUF_TYPE_FLAG_DATA_VOLATILE 0x40 +/** 4 bits are reserved for 16 allocation sources (e.g. heap, pool1, pool2, etc) + * Internally, we use: 0=heap, 1=MEMP_PBUF, 2=MEMP_PBUF_POOL -> 13 types free*/ +#define PBUF_TYPE_ALLOC_SRC_MASK 0x0F +/** Indicates this pbuf is used for RX (if not set, indicates use for TX). + * This information can be used to keep some spare RX buffers e.g. for + * receiving TCP ACKs to unblock a connection) */ +#define PBUF_ALLOC_FLAG_RX 0x0100 +/** Indicates the application needs the pbuf payload to be in one piece */ +#define PBUF_ALLOC_FLAG_DATA_CONTIGUOUS 0x0200 + +#define PBUF_TYPE_ALLOC_SRC_MASK_STD_HEAP 0x00 +#define PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF 0x01 +#define PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF_POOL 0x02 +/** First pbuf allocation type for applications */ +#define PBUF_TYPE_ALLOC_SRC_MASK_APP_MIN 0x03 +/** Last pbuf allocation type for applications */ +#define PBUF_TYPE_ALLOC_SRC_MASK_APP_MAX PBUF_TYPE_ALLOC_SRC_MASK + +/** + * @ingroup pbuf + * Enumeration of pbuf types + */ +typedef enum { + /** pbuf data is stored in RAM, used for TX mostly, struct pbuf and its payload + are allocated in one piece of contiguous memory (so the first payload byte + can be calculated from struct pbuf). + pbuf_alloc() allocates PBUF_RAM pbufs as unchained pbufs (although that might + change in future versions). + This should be used for all OUTGOING packets (TX).*/ + PBUF_RAM = (PBUF_ALLOC_FLAG_DATA_CONTIGUOUS | PBUF_TYPE_FLAG_STRUCT_DATA_CONTIGUOUS | PBUF_TYPE_ALLOC_SRC_MASK_STD_HEAP), + /** pbuf data is stored in ROM, i.e. struct pbuf and its payload are located in + totally different memory areas. Since it points to ROM, payload does not + have to be copied when queued for transmission. */ + PBUF_ROM = PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF, + /** pbuf comes from the pbuf pool. Much like PBUF_ROM but payload might change + so it has to be duplicated when queued before transmitting, depending on + who has a 'ref' to it. */ + PBUF_REF = (PBUF_TYPE_FLAG_DATA_VOLATILE | PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF), + /** pbuf payload refers to RAM. This one comes from a pool and should be used + for RX. Payload can be chained (scatter-gather RX) but like PBUF_RAM, struct + pbuf and its payload are allocated in one piece of contiguous memory (so + the first payload byte can be calculated from struct pbuf). + Don't use this for TX, if the pool becomes empty e.g. because of TCP queuing, + you are unable to receive TCP acks! */ + PBUF_POOL = (PBUF_ALLOC_FLAG_RX | PBUF_TYPE_FLAG_STRUCT_DATA_CONTIGUOUS | PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF_POOL) +} pbuf_type; + + +/** indicates this packet's data should be immediately passed to the application */ +#define PBUF_FLAG_PUSH 0x01U +/** indicates this is a custom pbuf: pbuf_free calls pbuf_custom->custom_free_function() + when the last reference is released (plus custom PBUF_RAM cannot be trimmed) */ +#define PBUF_FLAG_IS_CUSTOM 0x02U +/** indicates this pbuf is UDP multicast to be looped back */ +#define PBUF_FLAG_MCASTLOOP 0x04U +/** indicates this pbuf was received as link-level broadcast */ +#define PBUF_FLAG_LLBCAST 0x08U +/** indicates this pbuf was received as link-level multicast */ +#define PBUF_FLAG_LLMCAST 0x10U +/** indicates this pbuf includes a TCP FIN flag */ +#define PBUF_FLAG_TCP_FIN 0x20U + +/** Main packet buffer struct */ +struct pbuf { + /** next pbuf in singly linked pbuf chain */ + struct pbuf *next; + + /** pointer to the actual data in the buffer */ + void *payload; + + /** + * total length of this buffer and all next buffers in chain + * belonging to the same packet. + * + * For non-queue packet chains this is the invariant: + * p->tot_len == p->len + (p->next? p->next->tot_len: 0) + */ + u16_t tot_len; + + /** length of this buffer */ + u16_t len; + + /** a bit field indicating pbuf type and allocation sources + (see PBUF_TYPE_FLAG_*, PBUF_ALLOC_FLAG_* and PBUF_TYPE_ALLOC_SRC_MASK) + */ + u8_t type_internal; + + /** misc flags */ + u8_t flags; + + /** + * the reference count always equals the number of pointers + * that refer to this pbuf. This can be pointers from an application, + * the stack itself, or pbuf->next pointers from a chain. + */ + LWIP_PBUF_REF_T ref; + + /** For incoming packets, this contains the input netif's index */ + u8_t if_idx; + + /** In case the user needs to store data custom data on a pbuf */ + LWIP_PBUF_CUSTOM_DATA +}; + + +/** Helper struct for const-correctness only. + * The only meaning of this one is to provide a const payload pointer + * for PBUF_ROM type. + */ +struct pbuf_rom { + /** next pbuf in singly linked pbuf chain */ + struct pbuf *next; + + /** pointer to the actual data in the buffer */ + const void *payload; +}; + +#if LWIP_SUPPORT_CUSTOM_PBUF +/** Prototype for a function to free a custom pbuf */ +typedef void (*pbuf_free_custom_fn)(struct pbuf *p); + +/** A custom pbuf: like a pbuf, but following a function pointer to free it. */ +struct pbuf_custom { + /** The actual pbuf */ + struct pbuf pbuf; + /** This function is called when pbuf_free deallocates this pbuf(_custom) */ + pbuf_free_custom_fn custom_free_function; +}; +#endif /* LWIP_SUPPORT_CUSTOM_PBUF */ + +/** Define this to 0 to prevent freeing ooseq pbufs when the PBUF_POOL is empty */ +#ifndef PBUF_POOL_FREE_OOSEQ +#define PBUF_POOL_FREE_OOSEQ 1 +#endif /* PBUF_POOL_FREE_OOSEQ */ +#if LWIP_TCP && TCP_QUEUE_OOSEQ && NO_SYS && PBUF_POOL_FREE_OOSEQ +extern volatile u8_t pbuf_free_ooseq_pending; +void pbuf_free_ooseq(void); +/** When not using sys_check_timeouts(), call PBUF_CHECK_FREE_OOSEQ() + at regular intervals from main level to check if ooseq pbufs need to be + freed! */ +#define PBUF_CHECK_FREE_OOSEQ() do { if(pbuf_free_ooseq_pending) { \ + /* pbuf_alloc() reported PBUF_POOL to be empty -> try to free some \ + ooseq queued pbufs now */ \ + pbuf_free_ooseq(); }}while(0) +#else /* LWIP_TCP && TCP_QUEUE_OOSEQ && NO_SYS && PBUF_POOL_FREE_OOSEQ */ + /* Otherwise declare an empty PBUF_CHECK_FREE_OOSEQ */ + #define PBUF_CHECK_FREE_OOSEQ() +#endif /* LWIP_TCP && TCP_QUEUE_OOSEQ && NO_SYS && PBUF_POOL_FREE_OOSEQ*/ + +/* Initializes the pbuf module. This call is empty for now, but may not be in future. */ +#define pbuf_init() + +struct pbuf *pbuf_alloc(pbuf_layer l, u16_t length, pbuf_type type); +struct pbuf *pbuf_alloc_reference(void *payload, u16_t length, pbuf_type type); +#if LWIP_SUPPORT_CUSTOM_PBUF +struct pbuf *pbuf_alloced_custom(pbuf_layer l, u16_t length, pbuf_type type, + struct pbuf_custom *p, void *payload_mem, + u16_t payload_mem_len); +#endif /* LWIP_SUPPORT_CUSTOM_PBUF */ +void pbuf_realloc(struct pbuf *p, u16_t size); +#define pbuf_get_allocsrc(p) ((p)->type_internal & PBUF_TYPE_ALLOC_SRC_MASK) +#define pbuf_match_allocsrc(p, type) (pbuf_get_allocsrc(p) == ((type) & PBUF_TYPE_ALLOC_SRC_MASK)) +#define pbuf_match_type(p, type) pbuf_match_allocsrc(p, type) +u8_t pbuf_header(struct pbuf *p, s16_t header_size); +u8_t pbuf_header_force(struct pbuf *p, s16_t header_size); +u8_t pbuf_add_header(struct pbuf *p, size_t header_size_increment); +u8_t pbuf_add_header_force(struct pbuf *p, size_t header_size_increment); +u8_t pbuf_remove_header(struct pbuf *p, size_t header_size); +struct pbuf *pbuf_free_header(struct pbuf *q, u16_t size); +void pbuf_ref(struct pbuf *p); +u8_t pbuf_free(struct pbuf *p); +u16_t pbuf_clen(const struct pbuf *p); +void pbuf_cat(struct pbuf *head, struct pbuf *tail); +void pbuf_chain(struct pbuf *head, struct pbuf *tail); +struct pbuf *pbuf_dechain(struct pbuf *p); +err_t pbuf_copy(struct pbuf *p_to, const struct pbuf *p_from); +err_t pbuf_copy_partial_pbuf(struct pbuf *p_to, const struct pbuf *p_from, u16_t copy_len, u16_t offset); +u16_t pbuf_copy_partial(const struct pbuf *p, void *dataptr, u16_t len, u16_t offset); +void *pbuf_get_contiguous(const struct pbuf *p, void *buffer, size_t bufsize, u16_t len, u16_t offset); +err_t pbuf_take(struct pbuf *buf, const void *dataptr, u16_t len); +err_t pbuf_take_at(struct pbuf *buf, const void *dataptr, u16_t len, u16_t offset); +struct pbuf *pbuf_skip(struct pbuf* in, u16_t in_offset, u16_t* out_offset); +struct pbuf *pbuf_coalesce(struct pbuf *p, pbuf_layer layer); +struct pbuf *pbuf_clone(pbuf_layer l, pbuf_type type, struct pbuf *p); +#if LWIP_CHECKSUM_ON_COPY +err_t pbuf_fill_chksum(struct pbuf *p, u16_t start_offset, const void *dataptr, + u16_t len, u16_t *chksum); +#endif /* LWIP_CHECKSUM_ON_COPY */ +#if LWIP_TCP && TCP_QUEUE_OOSEQ && LWIP_WND_SCALE +void pbuf_split_64k(struct pbuf *p, struct pbuf **rest); +#endif /* LWIP_TCP && TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */ + +u8_t pbuf_get_at(const struct pbuf* p, u16_t offset); +int pbuf_try_get_at(const struct pbuf* p, u16_t offset); +void pbuf_put_at(struct pbuf* p, u16_t offset, u8_t data); +u16_t pbuf_memcmp(const struct pbuf* p, u16_t offset, const void* s2, u16_t n); +u16_t pbuf_memfind(const struct pbuf* p, const void* mem, u16_t mem_len, u16_t start_offset); +u16_t pbuf_strstr(const struct pbuf* p, const char* substr); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PBUF_H */ diff --git a/lib/lwip/include/lwip/priv/altcp_priv.h b/lib/lwip/include/lwip/priv/altcp_priv.h new file mode 100644 index 0000000000..50e6b970cd --- /dev/null +++ b/lib/lwip/include/lwip/priv/altcp_priv.h @@ -0,0 +1,159 @@ +/** + * @file + * Application layered TCP connection API (to be used from TCPIP thread)<br> + * This interface mimics the tcp callback API to the application while preventing + * direct linking (much like virtual functions). + * This way, an application can make use of other application layer protocols + * on top of TCP without knowing the details (e.g. TLS, proxy connection). + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ +#ifndef LWIP_HDR_ALTCP_PRIV_H +#define LWIP_HDR_ALTCP_PRIV_H + +#include "lwip/opt.h" + +#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/altcp.h" +#include "lwip/ip_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct altcp_pcb *altcp_alloc(void); +void altcp_free(struct altcp_pcb *conn); + +/* Function prototypes for application layers */ +typedef void (*altcp_set_poll_fn)(struct altcp_pcb *conn, u8_t interval); +typedef void (*altcp_recved_fn)(struct altcp_pcb *conn, u16_t len); +typedef err_t (*altcp_bind_fn)(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port); +typedef err_t (*altcp_connect_fn)(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected); + +typedef struct altcp_pcb *(*altcp_listen_fn)(struct altcp_pcb *conn, u8_t backlog, err_t *err); + +typedef void (*altcp_abort_fn)(struct altcp_pcb *conn); +typedef err_t (*altcp_close_fn)(struct altcp_pcb *conn); +typedef err_t (*altcp_shutdown_fn)(struct altcp_pcb *conn, int shut_rx, int shut_tx); + +typedef err_t (*altcp_write_fn)(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags); +typedef err_t (*altcp_output_fn)(struct altcp_pcb *conn); + +typedef u16_t (*altcp_mss_fn)(struct altcp_pcb *conn); +typedef u16_t (*altcp_sndbuf_fn)(struct altcp_pcb *conn); +typedef u16_t (*altcp_sndqueuelen_fn)(struct altcp_pcb *conn); +typedef void (*altcp_nagle_disable_fn)(struct altcp_pcb *conn); +typedef void (*altcp_nagle_enable_fn)(struct altcp_pcb *conn); +typedef int (*altcp_nagle_disabled_fn)(struct altcp_pcb *conn); + +typedef void (*altcp_setprio_fn)(struct altcp_pcb *conn, u8_t prio); + +typedef void (*altcp_dealloc_fn)(struct altcp_pcb *conn); + +typedef err_t (*altcp_get_tcp_addrinfo_fn)(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port); +typedef ip_addr_t *(*altcp_get_ip_fn)(struct altcp_pcb *conn, int local); +typedef u16_t (*altcp_get_port_fn)(struct altcp_pcb *conn, int local); + +#if LWIP_TCP_KEEPALIVE +typedef void (*altcp_keepalive_disable_fn)(struct altcp_pcb *conn); +typedef void (*altcp_keepalive_enable_fn)(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t count); +#endif + +#ifdef LWIP_DEBUG +typedef enum tcp_state (*altcp_dbg_get_tcp_state_fn)(struct altcp_pcb *conn); +#endif + +struct altcp_functions { + altcp_set_poll_fn set_poll; + altcp_recved_fn recved; + altcp_bind_fn bind; + altcp_connect_fn connect; + altcp_listen_fn listen; + altcp_abort_fn abort; + altcp_close_fn close; + altcp_shutdown_fn shutdown; + altcp_write_fn write; + altcp_output_fn output; + altcp_mss_fn mss; + altcp_sndbuf_fn sndbuf; + altcp_sndqueuelen_fn sndqueuelen; + altcp_nagle_disable_fn nagle_disable; + altcp_nagle_enable_fn nagle_enable; + altcp_nagle_disabled_fn nagle_disabled; + altcp_setprio_fn setprio; + altcp_dealloc_fn dealloc; + altcp_get_tcp_addrinfo_fn addrinfo; + altcp_get_ip_fn getip; + altcp_get_port_fn getport; +#if LWIP_TCP_KEEPALIVE + altcp_keepalive_disable_fn keepalive_disable; + altcp_keepalive_enable_fn keepalive_enable; +#endif +#ifdef LWIP_DEBUG + altcp_dbg_get_tcp_state_fn dbg_get_tcp_state; +#endif +}; + +void altcp_default_set_poll(struct altcp_pcb *conn, u8_t interval); +void altcp_default_recved(struct altcp_pcb *conn, u16_t len); +err_t altcp_default_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port); +err_t altcp_default_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx); +err_t altcp_default_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags); +err_t altcp_default_output(struct altcp_pcb *conn); +u16_t altcp_default_mss(struct altcp_pcb *conn); +u16_t altcp_default_sndbuf(struct altcp_pcb *conn); +u16_t altcp_default_sndqueuelen(struct altcp_pcb *conn); +void altcp_default_nagle_disable(struct altcp_pcb *conn); +void altcp_default_nagle_enable(struct altcp_pcb *conn); +int altcp_default_nagle_disabled(struct altcp_pcb *conn); +void altcp_default_setprio(struct altcp_pcb *conn, u8_t prio); +void altcp_default_dealloc(struct altcp_pcb *conn); +err_t altcp_default_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port); +ip_addr_t *altcp_default_get_ip(struct altcp_pcb *conn, int local); +u16_t altcp_default_get_port(struct altcp_pcb *conn, int local); +#if LWIP_TCP_KEEPALIVE +void altcp_default_keepalive_disable(struct altcp_pcb *conn); +void altcp_default_keepalive_enable(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t count); +#endif +#ifdef LWIP_DEBUG +enum tcp_state altcp_default_dbg_get_tcp_state(struct altcp_pcb *conn); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_ALTCP */ + +#endif /* LWIP_HDR_ALTCP_PRIV_H */ diff --git a/lib/lwip/include/lwip/priv/api_msg.h b/lib/lwip/include/lwip/priv/api_msg.h new file mode 100644 index 0000000000..9e8ffc9ea6 --- /dev/null +++ b/lib/lwip/include/lwip/priv/api_msg.h @@ -0,0 +1,272 @@ +/** + * @file + * netconn API lwIP internal implementations (do not use in application code) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_API_MSG_H +#define LWIP_HDR_API_MSG_H + +#include "lwip/opt.h" + +#include "lwip/arch.h" +#include "lwip/ip_addr.h" +#include "lwip/err.h" +#include "lwip/sys.h" +#include "lwip/igmp.h" +#include "lwip/api.h" +#include "lwip/priv/tcpip_priv.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_NETCONN || LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ +/* Note: Netconn API is always available when sockets are enabled - + * sockets are implemented on top of them */ + +#if LWIP_MPU_COMPATIBLE +#if LWIP_NETCONN_SEM_PER_THREAD +#define API_MSG_M_DEF_SEM(m) *m +#else +#define API_MSG_M_DEF_SEM(m) API_MSG_M_DEF(m) +#endif +#else /* LWIP_MPU_COMPATIBLE */ +#define API_MSG_M_DEF_SEM(m) API_MSG_M_DEF(m) +#endif /* LWIP_MPU_COMPATIBLE */ + +/* For the netconn API, these values are use as a bitmask! */ +#define NETCONN_SHUT_RD 1 +#define NETCONN_SHUT_WR 2 +#define NETCONN_SHUT_RDWR (NETCONN_SHUT_RD | NETCONN_SHUT_WR) + +/* IP addresses and port numbers are expected to be in + * the same byte order as in the corresponding pcb. + */ +/** This struct includes everything that is necessary to execute a function + for a netconn in another thread context (mainly used to process netconns + in the tcpip_thread context to be thread safe). */ +struct api_msg { + /** The netconn which to process - always needed: it includes the semaphore + which is used to block the application thread until the function finished. */ + struct netconn *conn; + /** The return value of the function executed in tcpip_thread. */ + err_t err; + /** Depending on the executed function, one of these union members is used */ + union { + /** used for lwip_netconn_do_send */ + struct netbuf *b; + /** used for lwip_netconn_do_newconn */ + struct { + u8_t proto; + } n; + /** used for lwip_netconn_do_bind and lwip_netconn_do_connect */ + struct { + API_MSG_M_DEF_C(ip_addr_t, ipaddr); + u16_t port; + u8_t if_idx; + } bc; + /** used for lwip_netconn_do_getaddr */ + struct { + ip_addr_t API_MSG_M_DEF(ipaddr); + u16_t API_MSG_M_DEF(port); + u8_t local; + } ad; + /** used for lwip_netconn_do_write */ + struct { + /** current vector to write */ + const struct netvector *vector; + /** number of unwritten vectors */ + u16_t vector_cnt; + /** offset into current vector */ + size_t vector_off; + /** total length across vectors */ + size_t len; + /** offset into total length/output of bytes written when err == ERR_OK */ + size_t offset; + u8_t apiflags; +#if LWIP_SO_SNDTIMEO + u32_t time_started; +#endif /* LWIP_SO_SNDTIMEO */ + } w; + /** used for lwip_netconn_do_recv */ + struct { + size_t len; + } r; +#if LWIP_TCP + /** used for lwip_netconn_do_close (/shutdown) */ + struct { + u8_t shut; +#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER + u32_t time_started; +#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + u8_t polls_left; +#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + } sd; +#endif /* LWIP_TCP */ +#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) + /** used for lwip_netconn_do_join_leave_group */ + struct { + API_MSG_M_DEF_C(ip_addr_t, multiaddr); + API_MSG_M_DEF_C(ip_addr_t, netif_addr); + u8_t if_idx; + enum netconn_igmp join_or_leave; + } jl; +#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */ +#if TCP_LISTEN_BACKLOG + struct { + u8_t backlog; + } lb; +#endif /* TCP_LISTEN_BACKLOG */ + } msg; +#if LWIP_NETCONN_SEM_PER_THREAD + sys_sem_t* op_completed_sem; +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ +}; + +#if LWIP_NETCONN_SEM_PER_THREAD +#define LWIP_API_MSG_SEM(msg) ((msg)->op_completed_sem) +#else /* LWIP_NETCONN_SEM_PER_THREAD */ +#define LWIP_API_MSG_SEM(msg) (&(msg)->conn->op_completed) +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + +#if LWIP_DNS +/** As lwip_netconn_do_gethostbyname requires more arguments but doesn't require a netconn, + it has its own struct (to avoid struct api_msg getting bigger than necessary). + lwip_netconn_do_gethostbyname must be called using tcpip_callback instead of tcpip_apimsg + (see netconn_gethostbyname). */ +struct dns_api_msg { + /** Hostname to query or dotted IP address string */ +#if LWIP_MPU_COMPATIBLE + char name[DNS_MAX_NAME_LENGTH]; +#else /* LWIP_MPU_COMPATIBLE */ + const char *name; +#endif /* LWIP_MPU_COMPATIBLE */ + /** The resolved address is stored here */ + ip_addr_t API_MSG_M_DEF(addr); +#if LWIP_IPV4 && LWIP_IPV6 + /** Type of resolve call */ + u8_t dns_addrtype; +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + /** This semaphore is posted when the name is resolved, the application thread + should wait on it. */ + sys_sem_t API_MSG_M_DEF_SEM(sem); + /** Errors are given back here */ + err_t API_MSG_M_DEF(err); +}; +#endif /* LWIP_DNS */ + +#if LWIP_NETCONN_FULLDUPLEX +int lwip_netconn_is_deallocated_msg(void *msg); +#endif +int lwip_netconn_is_err_msg(void *msg, err_t *err); +void lwip_netconn_do_newconn (void *m); +void lwip_netconn_do_delconn (void *m); +void lwip_netconn_do_bind (void *m); +void lwip_netconn_do_bind_if (void *m); +void lwip_netconn_do_connect (void *m); +void lwip_netconn_do_disconnect (void *m); +void lwip_netconn_do_listen (void *m); +void lwip_netconn_do_send (void *m); +void lwip_netconn_do_recv (void *m); +#if TCP_LISTEN_BACKLOG +void lwip_netconn_do_accepted (void *m); +#endif /* TCP_LISTEN_BACKLOG */ +void lwip_netconn_do_write (void *m); +void lwip_netconn_do_getaddr (void *m); +void lwip_netconn_do_close (void *m); +void lwip_netconn_do_shutdown (void *m); +#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) +void lwip_netconn_do_join_leave_group(void *m); +void lwip_netconn_do_join_leave_group_netif(void *m); +#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */ + +#if LWIP_DNS +void lwip_netconn_do_gethostbyname(void *arg); +#endif /* LWIP_DNS */ + +struct netconn* netconn_alloc(enum netconn_type t, netconn_callback callback); +void netconn_free(struct netconn *conn); + +#endif /* LWIP_NETCONN || LWIP_SOCKET */ + +#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */ + +/* netifapi related lwIP internal definitions */ + +#if LWIP_MPU_COMPATIBLE +#define NETIFAPI_IPADDR_DEF(type, m) type m +#else /* LWIP_MPU_COMPATIBLE */ +#define NETIFAPI_IPADDR_DEF(type, m) const type * m +#endif /* LWIP_MPU_COMPATIBLE */ + +typedef void (*netifapi_void_fn)(struct netif *netif); +typedef err_t (*netifapi_errt_fn)(struct netif *netif); + +struct netifapi_msg { + struct tcpip_api_call_data call; + struct netif *netif; + union { + struct { +#if LWIP_IPV4 + NETIFAPI_IPADDR_DEF(ip4_addr_t, ipaddr); + NETIFAPI_IPADDR_DEF(ip4_addr_t, netmask); + NETIFAPI_IPADDR_DEF(ip4_addr_t, gw); +#endif /* LWIP_IPV4 */ + void *state; + netif_init_fn init; + netif_input_fn input; + } add; + struct { + netifapi_void_fn voidfunc; + netifapi_errt_fn errtfunc; + } common; + struct { +#if LWIP_MPU_COMPATIBLE + char name[NETIF_NAMESIZE]; +#else /* LWIP_MPU_COMPATIBLE */ + char *name; +#endif /* LWIP_MPU_COMPATIBLE */ + u8_t index; + } ifs; + } msg; +}; + +#endif /* LWIP_NETIF_API */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_API_MSG_H */ diff --git a/lib/lwip/include/lwip/priv/mem_priv.h b/lib/lwip/include/lwip/priv/mem_priv.h new file mode 100644 index 0000000000..8630d75419 --- /dev/null +++ b/lib/lwip/include/lwip/priv/mem_priv.h @@ -0,0 +1,84 @@ +/** + * @file + * lwIP internal memory implementations (do not use in application code) + */ + +/* + * Copyright (c) 2018 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ + +#ifndef LWIP_HDR_MEM_PRIV_H +#define LWIP_HDR_MEM_PRIV_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#include "lwip/mem.h" + +#if MEM_OVERFLOW_CHECK || MEMP_OVERFLOW_CHECK +/* if MEM_OVERFLOW_CHECK or MEMP_OVERFLOW_CHECK is turned on, we reserve some + * bytes at the beginning and at the end of each element, initialize them as + * 0xcd and check them later. + * If MEM(P)_OVERFLOW_CHECK is >= 2, on every call to mem(p)_malloc or mem(p)_free, + * every single element in each pool/heap is checked! + * This is VERY SLOW but also very helpful. + * MEM_SANITY_REGION_BEFORE and MEM_SANITY_REGION_AFTER can be overridden in + * lwipopts.h to change the amount reserved for checking. */ +#ifndef MEM_SANITY_REGION_BEFORE +#define MEM_SANITY_REGION_BEFORE 16 +#endif /* MEM_SANITY_REGION_BEFORE*/ +#if MEM_SANITY_REGION_BEFORE > 0 +#define MEM_SANITY_REGION_BEFORE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEM_SANITY_REGION_BEFORE) +#else +#define MEM_SANITY_REGION_BEFORE_ALIGNED 0 +#endif /* MEM_SANITY_REGION_BEFORE*/ +#ifndef MEM_SANITY_REGION_AFTER +#define MEM_SANITY_REGION_AFTER 16 +#endif /* MEM_SANITY_REGION_AFTER*/ +#if MEM_SANITY_REGION_AFTER > 0 +#define MEM_SANITY_REGION_AFTER_ALIGNED LWIP_MEM_ALIGN_SIZE(MEM_SANITY_REGION_AFTER) +#else +#define MEM_SANITY_REGION_AFTER_ALIGNED 0 +#endif /* MEM_SANITY_REGION_AFTER*/ + +void mem_overflow_init_raw(void *p, size_t size); +void mem_overflow_check_raw(void *p, size_t size, const char *descr1, const char *descr2); + +#endif /* MEM_OVERFLOW_CHECK || MEMP_OVERFLOW_CHECK */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_MEMP_PRIV_H */ diff --git a/lib/lwip/include/lwip/priv/memp_priv.h b/lib/lwip/include/lwip/priv/memp_priv.h new file mode 100644 index 0000000000..1f14cb162b --- /dev/null +++ b/lib/lwip/include/lwip/priv/memp_priv.h @@ -0,0 +1,161 @@ +/** + * @file + * memory pools lwIP internal implementations (do not use in application code) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#ifndef LWIP_HDR_MEMP_PRIV_H +#define LWIP_HDR_MEMP_PRIV_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#include "lwip/mem.h" +#include "lwip/priv/mem_priv.h" + +#if MEMP_OVERFLOW_CHECK + + +/* MEMP_SIZE: save space for struct memp and for sanity check */ +#define MEMP_SIZE (LWIP_MEM_ALIGN_SIZE(sizeof(struct memp)) + MEM_SANITY_REGION_BEFORE_ALIGNED) +#define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x) + MEM_SANITY_REGION_AFTER_ALIGNED) + +#else /* MEMP_OVERFLOW_CHECK */ + +/* No sanity checks + * We don't need to preserve the struct memp while not allocated, so we + * can save a little space and set MEMP_SIZE to 0. + */ +#define MEMP_SIZE 0 +#define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x)) + +#endif /* MEMP_OVERFLOW_CHECK */ + +#if !MEMP_MEM_MALLOC || MEMP_OVERFLOW_CHECK +struct memp { + struct memp *next; +#if MEMP_OVERFLOW_CHECK + const char *file; + int line; +#endif /* MEMP_OVERFLOW_CHECK */ +}; +#endif /* !MEMP_MEM_MALLOC || MEMP_OVERFLOW_CHECK */ + +#if MEM_USE_POOLS && MEMP_USE_CUSTOM_POOLS +/* Use a helper type to get the start and end of the user "memory pools" for mem_malloc */ +typedef enum { + /* Get the first (via: + MEMP_POOL_HELPER_START = ((u8_t) 1*MEMP_POOL_A + 0*MEMP_POOL_B + 0*MEMP_POOL_C + 0)*/ + MEMP_POOL_HELPER_FIRST = ((u8_t) +#define LWIP_MEMPOOL(name,num,size,desc) +#define LWIP_MALLOC_MEMPOOL_START 1 +#define LWIP_MALLOC_MEMPOOL(num, size) * MEMP_POOL_##size + 0 +#define LWIP_MALLOC_MEMPOOL_END +#include "lwip/priv/memp_std.h" + ) , + /* Get the last (via: + MEMP_POOL_HELPER_END = ((u8_t) 0 + MEMP_POOL_A*0 + MEMP_POOL_B*0 + MEMP_POOL_C*1) */ + MEMP_POOL_HELPER_LAST = ((u8_t) +#define LWIP_MEMPOOL(name,num,size,desc) +#define LWIP_MALLOC_MEMPOOL_START +#define LWIP_MALLOC_MEMPOOL(num, size) 0 + MEMP_POOL_##size * +#define LWIP_MALLOC_MEMPOOL_END 1 +#include "lwip/priv/memp_std.h" + ) +} memp_pool_helper_t; + +/* The actual start and stop values are here (cast them over) + We use this helper type and these defines so we can avoid using const memp_t values */ +#define MEMP_POOL_FIRST ((memp_t) MEMP_POOL_HELPER_FIRST) +#define MEMP_POOL_LAST ((memp_t) MEMP_POOL_HELPER_LAST) +#endif /* MEM_USE_POOLS && MEMP_USE_CUSTOM_POOLS */ + +/** Memory pool descriptor */ +struct memp_desc { +#if defined(LWIP_DEBUG) || MEMP_OVERFLOW_CHECK || LWIP_STATS_DISPLAY + /** Textual description */ + const char *desc; +#endif /* LWIP_DEBUG || MEMP_OVERFLOW_CHECK || LWIP_STATS_DISPLAY */ +#if MEMP_STATS + /** Statistics */ + struct stats_mem *stats; +#endif + + /** Element size */ + u16_t size; + +#if !MEMP_MEM_MALLOC + /** Number of elements */ + u16_t num; + + /** Base address */ + u8_t *base; + + /** First free element of each pool. Elements form a linked list. */ + struct memp **tab; +#endif /* MEMP_MEM_MALLOC */ +}; + +#if defined(LWIP_DEBUG) || MEMP_OVERFLOW_CHECK || LWIP_STATS_DISPLAY +#define DECLARE_LWIP_MEMPOOL_DESC(desc) (desc), +#else +#define DECLARE_LWIP_MEMPOOL_DESC(desc) +#endif + +#if MEMP_STATS +#define LWIP_MEMPOOL_DECLARE_STATS_INSTANCE(name) static struct stats_mem name; +#define LWIP_MEMPOOL_DECLARE_STATS_REFERENCE(name) &name, +#else +#define LWIP_MEMPOOL_DECLARE_STATS_INSTANCE(name) +#define LWIP_MEMPOOL_DECLARE_STATS_REFERENCE(name) +#endif + +void memp_init_pool(const struct memp_desc *desc); + +#if MEMP_OVERFLOW_CHECK +void *memp_malloc_pool_fn(const struct memp_desc* desc, const char* file, const int line); +#define memp_malloc_pool(d) memp_malloc_pool_fn((d), __FILE__, __LINE__) +#else +void *memp_malloc_pool(const struct memp_desc *desc); +#endif +void memp_free_pool(const struct memp_desc* desc, void *mem); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_MEMP_PRIV_H */ diff --git a/lib/lwip/include/lwip/priv/memp_std.h b/lib/lwip/include/lwip/priv/memp_std.h new file mode 100644 index 0000000000..669ad4d7e6 --- /dev/null +++ b/lib/lwip/include/lwip/priv/memp_std.h @@ -0,0 +1,153 @@ +/** + * @file + * lwIP internal memory pools (do not use in application code) + * This file is deliberately included multiple times: once with empty + * definition of LWIP_MEMPOOL() to handle all includes and multiple times + * to build up various lists of mem pools. + */ + +/* + * SETUP: Make sure we define everything we will need. + * + * We have create three types of pools: + * 1) MEMPOOL - standard pools + * 2) MALLOC_MEMPOOL - to be used by mem_malloc in mem.c + * 3) PBUF_MEMPOOL - a mempool of pbuf's, so include space for the pbuf struct + * + * If the include'r doesn't require any special treatment of each of the types + * above, then will declare #2 & #3 to be just standard mempools. + */ +#ifndef LWIP_MALLOC_MEMPOOL +/* This treats "malloc pools" just like any other pool. + The pools are a little bigger to provide 'size' as the amount of user data. */ +#define LWIP_MALLOC_MEMPOOL(num, size) LWIP_MEMPOOL(POOL_##size, num, (size + LWIP_MEM_ALIGN_SIZE(sizeof(struct memp_malloc_helper))), "MALLOC_"#size) +#define LWIP_MALLOC_MEMPOOL_START +#define LWIP_MALLOC_MEMPOOL_END +#endif /* LWIP_MALLOC_MEMPOOL */ + +#ifndef LWIP_PBUF_MEMPOOL +/* This treats "pbuf pools" just like any other pool. + * Allocates buffers for a pbuf struct AND a payload size */ +#define LWIP_PBUF_MEMPOOL(name, num, payload, desc) LWIP_MEMPOOL(name, num, (LWIP_MEM_ALIGN_SIZE(sizeof(struct pbuf)) + LWIP_MEM_ALIGN_SIZE(payload)), desc) +#endif /* LWIP_PBUF_MEMPOOL */ + + +/* + * A list of internal pools used by LWIP. + * + * LWIP_MEMPOOL(pool_name, number_elements, element_size, pool_description) + * creates a pool name MEMP_pool_name. description is used in stats.c + */ +#if LWIP_RAW +LWIP_MEMPOOL(RAW_PCB, MEMP_NUM_RAW_PCB, sizeof(struct raw_pcb), "RAW_PCB") +#endif /* LWIP_RAW */ + +#if LWIP_UDP +LWIP_MEMPOOL(UDP_PCB, MEMP_NUM_UDP_PCB, sizeof(struct udp_pcb), "UDP_PCB") +#endif /* LWIP_UDP */ + +#if LWIP_TCP +LWIP_MEMPOOL(TCP_PCB, MEMP_NUM_TCP_PCB, sizeof(struct tcp_pcb), "TCP_PCB") +LWIP_MEMPOOL(TCP_PCB_LISTEN, MEMP_NUM_TCP_PCB_LISTEN, sizeof(struct tcp_pcb_listen), "TCP_PCB_LISTEN") +LWIP_MEMPOOL(TCP_SEG, MEMP_NUM_TCP_SEG, sizeof(struct tcp_seg), "TCP_SEG") +#endif /* LWIP_TCP */ + +#if LWIP_ALTCP && LWIP_TCP +LWIP_MEMPOOL(ALTCP_PCB, MEMP_NUM_ALTCP_PCB, sizeof(struct altcp_pcb), "ALTCP_PCB") +#endif /* LWIP_ALTCP && LWIP_TCP */ + +#if LWIP_IPV4 && IP_REASSEMBLY +LWIP_MEMPOOL(REASSDATA, MEMP_NUM_REASSDATA, sizeof(struct ip_reassdata), "REASSDATA") +#endif /* LWIP_IPV4 && IP_REASSEMBLY */ +#if (IP_FRAG && !LWIP_NETIF_TX_SINGLE_PBUF) || (LWIP_IPV6 && LWIP_IPV6_FRAG) +LWIP_MEMPOOL(FRAG_PBUF, MEMP_NUM_FRAG_PBUF, sizeof(struct pbuf_custom_ref),"FRAG_PBUF") +#endif /* IP_FRAG && !LWIP_NETIF_TX_SINGLE_PBUF || (LWIP_IPV6 && LWIP_IPV6_FRAG) */ + +#if LWIP_NETCONN || LWIP_SOCKET +LWIP_MEMPOOL(NETBUF, MEMP_NUM_NETBUF, sizeof(struct netbuf), "NETBUF") +LWIP_MEMPOOL(NETCONN, MEMP_NUM_NETCONN, sizeof(struct netconn), "NETCONN") +#endif /* LWIP_NETCONN || LWIP_SOCKET */ + +#if NO_SYS==0 +LWIP_MEMPOOL(TCPIP_MSG_API, MEMP_NUM_TCPIP_MSG_API, sizeof(struct tcpip_msg), "TCPIP_MSG_API") +#if LWIP_MPU_COMPATIBLE +LWIP_MEMPOOL(API_MSG, MEMP_NUM_API_MSG, sizeof(struct api_msg), "API_MSG") +#if LWIP_DNS +LWIP_MEMPOOL(DNS_API_MSG, MEMP_NUM_DNS_API_MSG, sizeof(struct dns_api_msg), "DNS_API_MSG") +#endif +#if LWIP_SOCKET && !LWIP_TCPIP_CORE_LOCKING +LWIP_MEMPOOL(SOCKET_SETGETSOCKOPT_DATA, MEMP_NUM_SOCKET_SETGETSOCKOPT_DATA, sizeof(struct lwip_setgetsockopt_data), "SOCKET_SETGETSOCKOPT_DATA") +#endif +#if LWIP_SOCKET && (LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL) +LWIP_MEMPOOL(SELECT_CB, MEMP_NUM_SELECT_CB, sizeof(struct lwip_select_cb), "SELECT_CB") +#endif /* LWIP_SOCKET && (LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL) */ +#if LWIP_NETIF_API +LWIP_MEMPOOL(NETIFAPI_MSG, MEMP_NUM_NETIFAPI_MSG, sizeof(struct netifapi_msg), "NETIFAPI_MSG") +#endif +#endif /* LWIP_MPU_COMPATIBLE */ +#if !LWIP_TCPIP_CORE_LOCKING_INPUT +LWIP_MEMPOOL(TCPIP_MSG_INPKT,MEMP_NUM_TCPIP_MSG_INPKT, sizeof(struct tcpip_msg), "TCPIP_MSG_INPKT") +#endif /* !LWIP_TCPIP_CORE_LOCKING_INPUT */ +#endif /* NO_SYS==0 */ + +#if LWIP_IPV4 && LWIP_ARP && ARP_QUEUEING +LWIP_MEMPOOL(ARP_QUEUE, MEMP_NUM_ARP_QUEUE, sizeof(struct etharp_q_entry), "ARP_QUEUE") +#endif /* LWIP_IPV4 && LWIP_ARP && ARP_QUEUEING */ + +#if LWIP_IGMP +LWIP_MEMPOOL(IGMP_GROUP, MEMP_NUM_IGMP_GROUP, sizeof(struct igmp_group), "IGMP_GROUP") +#endif /* LWIP_IGMP */ + +#if LWIP_TIMERS && !LWIP_TIMERS_CUSTOM +LWIP_MEMPOOL(SYS_TIMEOUT, MEMP_NUM_SYS_TIMEOUT, sizeof(struct sys_timeo), "SYS_TIMEOUT") +#endif /* LWIP_TIMERS && !LWIP_TIMERS_CUSTOM */ + +#if LWIP_DNS && LWIP_SOCKET +LWIP_MEMPOOL(NETDB, MEMP_NUM_NETDB, NETDB_ELEM_SIZE, "NETDB") +#endif /* LWIP_DNS && LWIP_SOCKET */ +#if LWIP_DNS && DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC +LWIP_MEMPOOL(LOCALHOSTLIST, MEMP_NUM_LOCALHOSTLIST, LOCALHOSTLIST_ELEM_SIZE, "LOCALHOSTLIST") +#endif /* LWIP_DNS && DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC */ + +#if LWIP_IPV6 && LWIP_ND6_QUEUEING +LWIP_MEMPOOL(ND6_QUEUE, MEMP_NUM_ND6_QUEUE, sizeof(struct nd6_q_entry), "ND6_QUEUE") +#endif /* LWIP_IPV6 && LWIP_ND6_QUEUEING */ + +#if LWIP_IPV6 && LWIP_IPV6_REASS +LWIP_MEMPOOL(IP6_REASSDATA, MEMP_NUM_REASSDATA, sizeof(struct ip6_reassdata), "IP6_REASSDATA") +#endif /* LWIP_IPV6 && LWIP_IPV6_REASS */ + +#if LWIP_IPV6 && LWIP_IPV6_MLD +LWIP_MEMPOOL(MLD6_GROUP, MEMP_NUM_MLD6_GROUP, sizeof(struct mld_group), "MLD6_GROUP") +#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ + + +/* + * A list of pools of pbuf's used by LWIP. + * + * LWIP_PBUF_MEMPOOL(pool_name, number_elements, pbuf_payload_size, pool_description) + * creates a pool name MEMP_pool_name. description is used in stats.c + * This allocates enough space for the pbuf struct and a payload. + * (Example: pbuf_payload_size=0 allocates only size for the struct) + */ +LWIP_MEMPOOL(PBUF, MEMP_NUM_PBUF, sizeof(struct pbuf), "PBUF_REF/ROM") +LWIP_PBUF_MEMPOOL(PBUF_POOL, PBUF_POOL_SIZE, PBUF_POOL_BUFSIZE, "PBUF_POOL") + + +/* + * Allow for user-defined pools; this must be explicitly set in lwipopts.h + * since the default is to NOT look for lwippools.h + */ +#if MEMP_USE_CUSTOM_POOLS +#include "lwippools.h" +#endif /* MEMP_USE_CUSTOM_POOLS */ + +/* + * REQUIRED CLEANUP: Clear up so we don't get "multiply defined" error later + * (#undef is ignored for something that is not defined) + */ +#undef LWIP_MEMPOOL +#undef LWIP_MALLOC_MEMPOOL +#undef LWIP_MALLOC_MEMPOOL_START +#undef LWIP_MALLOC_MEMPOOL_END +#undef LWIP_PBUF_MEMPOOL diff --git a/lib/lwip/include/lwip/priv/nd6_priv.h b/lib/lwip/include/lwip/priv/nd6_priv.h new file mode 100644 index 0000000000..75d5f02d38 --- /dev/null +++ b/lib/lwip/include/lwip/priv/nd6_priv.h @@ -0,0 +1,143 @@ +/** + * @file + * + * Neighbor discovery and stateless address autoconfiguration for IPv6. + * Aims to be compliant with RFC 4861 (Neighbor discovery) and RFC 4862 + * (Address autoconfiguration). + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#ifndef LWIP_HDR_ND6_PRIV_H +#define LWIP_HDR_ND6_PRIV_H + +#include "lwip/opt.h" + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/pbuf.h" +#include "lwip/ip6_addr.h" +#include "lwip/netif.h" + + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_ND6_QUEUEING +/** struct for queueing outgoing packets for unknown address + * defined here to be accessed by memp.h + */ +struct nd6_q_entry { + struct nd6_q_entry *next; + struct pbuf *p; +}; +#endif /* LWIP_ND6_QUEUEING */ + +/** Struct for tables. */ +struct nd6_neighbor_cache_entry { + ip6_addr_t next_hop_address; + struct netif *netif; + u8_t lladdr[NETIF_MAX_HWADDR_LEN]; + /*u32_t pmtu;*/ +#if LWIP_ND6_QUEUEING + /** Pointer to queue of pending outgoing packets on this entry. */ + struct nd6_q_entry *q; +#else /* LWIP_ND6_QUEUEING */ + /** Pointer to a single pending outgoing packet on this entry. */ + struct pbuf *q; +#endif /* LWIP_ND6_QUEUEING */ + u8_t state; + u8_t isrouter; + union { + u32_t reachable_time; /* in seconds */ + u32_t delay_time; /* ticks (ND6_TMR_INTERVAL) */ + u32_t probes_sent; + u32_t stale_time; /* ticks (ND6_TMR_INTERVAL) */ + } counter; +}; + +struct nd6_destination_cache_entry { + ip6_addr_t destination_addr; + ip6_addr_t next_hop_addr; + u16_t pmtu; + u8_t cached_neighbor_idx; + u32_t age; +}; + +struct nd6_prefix_list_entry { + ip6_addr_t prefix; + struct netif *netif; + u32_t invalidation_timer; /* in seconds */ +}; + +struct nd6_router_list_entry { + struct nd6_neighbor_cache_entry *neighbor_entry; + u32_t invalidation_timer; /* in seconds */ + u8_t flags; +}; + +enum nd6_neighbor_cache_entry_state { + ND6_NO_ENTRY = 0, + ND6_INCOMPLETE, + ND6_REACHABLE, + ND6_STALE, + ND6_DELAY, + ND6_PROBE +}; + +#define ND6_HOPLIM 255 /* maximum hop limit, required in all ND packets */ + +#define ND6_2HRS 7200 /* two hours, expressed in number of seconds */ + +/* Router tables. */ +/* @todo make these static? and entries accessible through API? */ +extern struct nd6_neighbor_cache_entry neighbor_cache[]; +extern struct nd6_destination_cache_entry destination_cache[]; +extern struct nd6_prefix_list_entry prefix_list[]; +extern struct nd6_router_list_entry default_router_list[]; + +/* Default values, can be updated by a RA message. */ +extern u32_t reachable_time; +extern u32_t retrans_timer; + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 */ + +#endif /* LWIP_HDR_ND6_PRIV_H */ diff --git a/lib/lwip/include/lwip/priv/raw_priv.h b/lib/lwip/include/lwip/priv/raw_priv.h new file mode 100644 index 0000000000..d4561d4f32 --- /dev/null +++ b/lib/lwip/include/lwip/priv/raw_priv.h @@ -0,0 +1,69 @@ +/** + * @file + * raw API internal implementations (do not use in application code) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_RAW_PRIV_H +#define LWIP_HDR_RAW_PRIV_H + +#include "lwip/opt.h" + +#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/raw.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** return codes for raw_input */ +typedef enum raw_input_state +{ + RAW_INPUT_NONE = 0, /* pbuf did not match any pcbs */ + RAW_INPUT_EATEN, /* pbuf handed off and delivered to pcb */ + RAW_INPUT_DELIVERED /* pbuf only delivered to pcb (pbuf can still be referenced) */ +} raw_input_state_t; + +/* The following functions are the lower layer interface to RAW. */ +raw_input_state_t raw_input(struct pbuf *p, struct netif *inp); + +void raw_netif_ip_addr_changed(const ip_addr_t* old_addr, const ip_addr_t* new_addr); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_RAW */ + +#endif /* LWIP_HDR_RAW_PRIV_H */ diff --git a/lib/lwip/include/lwip/priv/sockets_priv.h b/lib/lwip/include/lwip/priv/sockets_priv.h new file mode 100644 index 0000000000..c604734c25 --- /dev/null +++ b/lib/lwip/include/lwip/priv/sockets_priv.h @@ -0,0 +1,175 @@ +/** + * @file + * Sockets API internal implementations (do not use in application code) + */ + +/* + * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. joel.cunningham@garmin.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Joel Cunningham joel.cunningham@me.com + * + */ +#ifndef LWIP_HDR_SOCKETS_PRIV_H +#define LWIP_HDR_SOCKETS_PRIV_H + +#include "lwip/opt.h" + +#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/err.h" +#include "lwip/sockets.h" +#include "lwip/sys.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define NUM_SOCKETS MEMP_NUM_NETCONN + +/** This is overridable for the rare case where more than 255 threads + * select on the same socket... + */ +#ifndef SELWAIT_T +#define SELWAIT_T u8_t +#endif + +union lwip_sock_lastdata { + struct netbuf *netbuf; + struct pbuf *pbuf; +}; + +/** Contains all internal pointers and states used for a socket */ +struct lwip_sock { + /** sockets currently are built on netconns, each socket has one netconn */ + struct netconn *conn; + /** data that was left from the previous read */ + union lwip_sock_lastdata lastdata; +#if LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL + /** number of times data was received, set by event_callback(), + tested by the receive and select functions */ + s16_t rcvevent; + /** number of times data was ACKed (free send buffer), set by event_callback(), + tested by select */ + u16_t sendevent; + /** error happened for this socket, set by event_callback(), tested by select */ + u16_t errevent; + /** counter of how many threads are waiting for this socket using select */ + SELWAIT_T select_waiting; +#endif /* LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL */ +#if LWIP_NETCONN_FULLDUPLEX + /* counter of how many threads are using a struct lwip_sock (not the 'int') */ + u8_t fd_used; + /* status of pending close/delete actions */ + u8_t fd_free_pending; +#define LWIP_SOCK_FD_FREE_TCP 1 +#define LWIP_SOCK_FD_FREE_FREE 2 +#endif +}; + +#ifndef set_errno +#define set_errno(err) do { if (err) { errno = (err); } } while(0) +#endif + +#if !LWIP_TCPIP_CORE_LOCKING +/** Maximum optlen used by setsockopt/getsockopt */ +#define LWIP_SETGETSOCKOPT_MAXOPTLEN LWIP_MAX(16, sizeof(struct ifreq)) + +/** This struct is used to pass data to the set/getsockopt_impl + * functions running in tcpip_thread context (only a void* is allowed) */ +struct lwip_setgetsockopt_data { + /** socket index for which to change options */ + int s; + /** level of the option to process */ + int level; + /** name of the option to process */ + int optname; + /** set: value to set the option to + * get: value of the option is stored here */ +#if LWIP_MPU_COMPATIBLE + u8_t optval[LWIP_SETGETSOCKOPT_MAXOPTLEN]; +#else + union { + void *p; + const void *pc; + } optval; +#endif + /** size of *optval */ + socklen_t optlen; + /** if an error occurs, it is temporarily stored here */ + int err; + /** semaphore to wake up the calling task */ + void* completed_sem; +}; +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + +#ifdef __cplusplus +} +#endif + +struct lwip_sock* lwip_socket_dbg_get_socket(int fd); + +#if LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL + +#if LWIP_NETCONN_SEM_PER_THREAD +#define SELECT_SEM_T sys_sem_t* +#define SELECT_SEM_PTR(sem) (sem) +#else /* LWIP_NETCONN_SEM_PER_THREAD */ +#define SELECT_SEM_T sys_sem_t +#define SELECT_SEM_PTR(sem) (&(sem)) +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + +/** Description for a task waiting in select */ +struct lwip_select_cb { + /** Pointer to the next waiting task */ + struct lwip_select_cb *next; + /** Pointer to the previous waiting task */ + struct lwip_select_cb *prev; +#if LWIP_SOCKET_SELECT + /** readset passed to select */ + fd_set *readset; + /** writeset passed to select */ + fd_set *writeset; + /** unimplemented: exceptset passed to select */ + fd_set *exceptset; +#endif /* LWIP_SOCKET_SELECT */ +#if LWIP_SOCKET_POLL + /** fds passed to poll; NULL if select */ + struct pollfd *poll_fds; + /** nfds passed to poll; 0 if select */ + nfds_t poll_nfds; +#endif /* LWIP_SOCKET_POLL */ + /** don't signal the same semaphore twice: set to 1 when signalled */ + int sem_signalled; + /** semaphore to wake up a task waiting for select */ + SELECT_SEM_T sem; +}; +#endif /* LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL */ + +#endif /* LWIP_SOCKET */ + +#endif /* LWIP_HDR_SOCKETS_PRIV_H */ diff --git a/lib/lwip/include/lwip/priv/tcp_priv.h b/lib/lwip/include/lwip/priv/tcp_priv.h new file mode 100644 index 0000000000..a8e87e5931 --- /dev/null +++ b/lib/lwip/include/lwip/priv/tcp_priv.h @@ -0,0 +1,523 @@ +/** + * @file + * TCP internal implementations (do not use in application code) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_TCP_PRIV_H +#define LWIP_HDR_TCP_PRIV_H + +#include "lwip/opt.h" + +#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/tcp.h" +#include "lwip/mem.h" +#include "lwip/pbuf.h" +#include "lwip/ip.h" +#include "lwip/icmp.h" +#include "lwip/err.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/prot/tcp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Functions for interfacing with TCP: */ + +/* Lower layer interface to TCP: */ +void tcp_init (void); /* Initialize this module. */ +void tcp_tmr (void); /* Must be called every + TCP_TMR_INTERVAL + ms. (Typically 250 ms). */ +/* It is also possible to call these two functions at the right + intervals (instead of calling tcp_tmr()). */ +void tcp_slowtmr (void); +void tcp_fasttmr (void); + +/* Call this from a netif driver (watch out for threading issues!) that has + returned a memory error on transmit and now has free buffers to send more. + This iterates all active pcbs that had an error and tries to call + tcp_output, so use this with care as it might slow down the system. */ +void tcp_txnow (void); + +/* Only used by IP to pass a TCP segment to TCP: */ +void tcp_input (struct pbuf *p, struct netif *inp); +/* Used within the TCP code only: */ +struct tcp_pcb * tcp_alloc (u8_t prio); +void tcp_free (struct tcp_pcb *pcb); +void tcp_abandon (struct tcp_pcb *pcb, int reset); +err_t tcp_send_empty_ack(struct tcp_pcb *pcb); +err_t tcp_rexmit (struct tcp_pcb *pcb); +err_t tcp_rexmit_rto_prepare(struct tcp_pcb *pcb); +void tcp_rexmit_rto_commit(struct tcp_pcb *pcb); +void tcp_rexmit_rto (struct tcp_pcb *pcb); +void tcp_rexmit_fast (struct tcp_pcb *pcb); +u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb); +err_t tcp_process_refused_data(struct tcp_pcb *pcb); + +/** + * This is the Nagle algorithm: try to combine user data to send as few TCP + * segments as possible. Only send if + * - no previously transmitted data on the connection remains unacknowledged or + * - the TF_NODELAY flag is set (nagle algorithm turned off for this pcb) or + * - the only unsent segment is at least pcb->mss bytes long (or there is more + * than one unsent segment - with lwIP, this can happen although unsent->len < mss) + * - or if we are in fast-retransmit (TF_INFR) + */ +#define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \ + ((tpcb)->flags & (TF_NODELAY | TF_INFR)) || \ + (((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \ + ((tpcb)->unsent->len >= (tpcb)->mss))) || \ + ((tcp_sndbuf(tpcb) == 0) || (tcp_sndqueuelen(tpcb) >= TCP_SND_QUEUELEN)) \ + ) ? 1 : 0) +#define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK) + + +#define TCP_SEQ_LT(a,b) (((u32_t)((u32_t)(a) - (u32_t)(b)) & 0x80000000u) != 0) +#define TCP_SEQ_LEQ(a,b) (!(TCP_SEQ_LT(b,a))) +#define TCP_SEQ_GT(a,b) TCP_SEQ_LT(b,a) +#define TCP_SEQ_GEQ(a,b) TCP_SEQ_LEQ(b,a) +/* is b<=a<=c? */ +#define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c)) + +#ifndef TCP_TMR_INTERVAL +#define TCP_TMR_INTERVAL 250 /* The TCP timer interval in milliseconds. */ +#endif /* TCP_TMR_INTERVAL */ + +#ifndef TCP_FAST_INTERVAL +#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */ +#endif /* TCP_FAST_INTERVAL */ + +#ifndef TCP_SLOW_INTERVAL +#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in milliseconds */ +#endif /* TCP_SLOW_INTERVAL */ + +#define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */ +#define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */ + +#define TCP_OOSEQ_TIMEOUT 6U /* x RTO */ + +#ifndef TCP_MSL +#define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */ +#endif + +/* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */ +#ifndef TCP_KEEPIDLE_DEFAULT +#define TCP_KEEPIDLE_DEFAULT 7200000UL /* Default KEEPALIVE timer in milliseconds */ +#endif + +#ifndef TCP_KEEPINTVL_DEFAULT +#define TCP_KEEPINTVL_DEFAULT 75000UL /* Default Time between KEEPALIVE probes in milliseconds */ +#endif + +#ifndef TCP_KEEPCNT_DEFAULT +#define TCP_KEEPCNT_DEFAULT 9U /* Default Counter for KEEPALIVE probes */ +#endif + +#define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */ + +#define TCP_TCPLEN(seg) ((seg)->len + (((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0) ? 1U : 0U)) + +/** Flags used on input processing, not on pcb->flags +*/ +#define TF_RESET (u8_t)0x08U /* Connection was reset. */ +#define TF_CLOSED (u8_t)0x10U /* Connection was successfully closed. */ +#define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */ + + +#if LWIP_EVENT_API + +#define TCP_EVENT_ACCEPT(lpcb,pcb,arg,err,ret) ret = lwip_tcp_event(arg, (pcb),\ + LWIP_EVENT_ACCEPT, NULL, 0, err) +#define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_SENT, NULL, space, ERR_OK) +#define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_RECV, (p), 0, (err)) +#define TCP_EVENT_CLOSED(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_RECV, NULL, 0, ERR_OK) +#define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ + LWIP_EVENT_CONNECTED, NULL, 0, (err)) +#define TCP_EVENT_POLL(pcb,ret) do { if ((pcb)->state != SYN_RCVD) { \ + ret = lwip_tcp_event((pcb)->callback_arg, (pcb), LWIP_EVENT_POLL, NULL, 0, ERR_OK); \ + } else { \ + ret = ERR_ARG; } } while(0) +/* For event API, last state SYN_RCVD must be excluded here: the application + has not seen this pcb, yet! */ +#define TCP_EVENT_ERR(last_state,errf,arg,err) do { if (last_state != SYN_RCVD) { \ + lwip_tcp_event((arg), NULL, LWIP_EVENT_ERR, NULL, 0, (err)); } } while(0) + +#else /* LWIP_EVENT_API */ + +#define TCP_EVENT_ACCEPT(lpcb,pcb,arg,err,ret) \ + do { \ + if((lpcb)->accept != NULL) \ + (ret) = (lpcb)->accept((arg),(pcb),(err)); \ + else (ret) = ERR_ARG; \ + } while (0) + +#define TCP_EVENT_SENT(pcb,space,ret) \ + do { \ + if((pcb)->sent != NULL) \ + (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \ + else (ret) = ERR_OK; \ + } while (0) + +#define TCP_EVENT_RECV(pcb,p,err,ret) \ + do { \ + if((pcb)->recv != NULL) { \ + (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err));\ + } else { \ + (ret) = tcp_recv_null(NULL, (pcb), (p), (err)); \ + } \ + } while (0) + +#define TCP_EVENT_CLOSED(pcb,ret) \ + do { \ + if(((pcb)->recv != NULL)) { \ + (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),NULL,ERR_OK);\ + } else { \ + (ret) = ERR_OK; \ + } \ + } while (0) + +#define TCP_EVENT_CONNECTED(pcb,err,ret) \ + do { \ + if((pcb)->connected != NULL) \ + (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \ + else (ret) = ERR_OK; \ + } while (0) + +#define TCP_EVENT_POLL(pcb,ret) \ + do { \ + if((pcb)->poll != NULL) \ + (ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \ + else (ret) = ERR_OK; \ + } while (0) + +#define TCP_EVENT_ERR(last_state,errf,arg,err) \ + do { \ + LWIP_UNUSED_ARG(last_state); \ + if((errf) != NULL) \ + (errf)((arg),(err)); \ + } while (0) + +#endif /* LWIP_EVENT_API */ + +/** Enabled extra-check for TCP_OVERSIZE if LWIP_DEBUG is enabled */ +#if TCP_OVERSIZE && defined(LWIP_DEBUG) +#define TCP_OVERSIZE_DBGCHECK 1 +#else +#define TCP_OVERSIZE_DBGCHECK 0 +#endif + +/** Don't generate checksum on copy if CHECKSUM_GEN_TCP is disabled */ +#define TCP_CHECKSUM_ON_COPY (LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_TCP) + +/* This structure represents a TCP segment on the unsent, unacked and ooseq queues */ +struct tcp_seg { + struct tcp_seg *next; /* used when putting segments on a queue */ + struct pbuf *p; /* buffer containing data + TCP header */ + u16_t len; /* the TCP length of this segment */ +#if TCP_OVERSIZE_DBGCHECK + u16_t oversize_left; /* Extra bytes available at the end of the last + pbuf in unsent (used for asserting vs. + tcp_pcb.unsent_oversize only) */ +#endif /* TCP_OVERSIZE_DBGCHECK */ +#if TCP_CHECKSUM_ON_COPY + u16_t chksum; + u8_t chksum_swapped; +#endif /* TCP_CHECKSUM_ON_COPY */ + u8_t flags; +#define TF_SEG_OPTS_MSS (u8_t)0x01U /* Include MSS option (only used in SYN segments) */ +#define TF_SEG_OPTS_TS (u8_t)0x02U /* Include timestamp option. */ +#define TF_SEG_DATA_CHECKSUMMED (u8_t)0x04U /* ALL data (not the header) is + checksummed into 'chksum' */ +#define TF_SEG_OPTS_WND_SCALE (u8_t)0x08U /* Include WND SCALE option (only used in SYN segments) */ +#define TF_SEG_OPTS_SACK_PERM (u8_t)0x10U /* Include SACK Permitted option (only used in SYN segments) */ + struct tcp_hdr *tcphdr; /* the TCP header */ +}; + +#define LWIP_TCP_OPT_EOL 0 +#define LWIP_TCP_OPT_NOP 1 +#define LWIP_TCP_OPT_MSS 2 +#define LWIP_TCP_OPT_WS 3 +#define LWIP_TCP_OPT_SACK_PERM 4 +#define LWIP_TCP_OPT_TS 8 + +#define LWIP_TCP_OPT_LEN_MSS 4 +#if LWIP_TCP_TIMESTAMPS +#define LWIP_TCP_OPT_LEN_TS 10 +#define LWIP_TCP_OPT_LEN_TS_OUT 12 /* aligned for output (includes NOP padding) */ +#else +#define LWIP_TCP_OPT_LEN_TS_OUT 0 +#endif +#if LWIP_WND_SCALE +#define LWIP_TCP_OPT_LEN_WS 3 +#define LWIP_TCP_OPT_LEN_WS_OUT 4 /* aligned for output (includes NOP padding) */ +#else +#define LWIP_TCP_OPT_LEN_WS_OUT 0 +#endif + +#if LWIP_TCP_SACK_OUT +#define LWIP_TCP_OPT_LEN_SACK_PERM 2 +#define LWIP_TCP_OPT_LEN_SACK_PERM_OUT 4 /* aligned for output (includes NOP padding) */ +#else +#define LWIP_TCP_OPT_LEN_SACK_PERM_OUT 0 +#endif + +#define LWIP_TCP_OPT_LENGTH(flags) \ + ((flags) & TF_SEG_OPTS_MSS ? LWIP_TCP_OPT_LEN_MSS : 0) + \ + ((flags) & TF_SEG_OPTS_TS ? LWIP_TCP_OPT_LEN_TS_OUT : 0) + \ + ((flags) & TF_SEG_OPTS_WND_SCALE ? LWIP_TCP_OPT_LEN_WS_OUT : 0) + \ + ((flags) & TF_SEG_OPTS_SACK_PERM ? LWIP_TCP_OPT_LEN_SACK_PERM_OUT : 0) + +/** This returns a TCP header option for MSS in an u32_t */ +#define TCP_BUILD_MSS_OPTION(mss) lwip_htonl(0x02040000 | ((mss) & 0xFFFF)) + +#if LWIP_WND_SCALE +#define TCPWNDSIZE_F U32_F +#define TCPWND_MAX 0xFFFFFFFFU +#define TCPWND_CHECK16(x) LWIP_ASSERT("window size > 0xFFFF", (x) <= 0xFFFF) +#define TCPWND_MIN16(x) ((u16_t)LWIP_MIN((x), 0xFFFF)) +#else /* LWIP_WND_SCALE */ +#define TCPWNDSIZE_F U16_F +#define TCPWND_MAX 0xFFFFU +#define TCPWND_CHECK16(x) +#define TCPWND_MIN16(x) x +#endif /* LWIP_WND_SCALE */ + +/* Global variables: */ +extern struct tcp_pcb *tcp_input_pcb; +extern u32_t tcp_ticks; +extern u8_t tcp_active_pcbs_changed; + +/* The TCP PCB lists. */ +union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */ + struct tcp_pcb_listen *listen_pcbs; + struct tcp_pcb *pcbs; +}; +extern struct tcp_pcb *tcp_bound_pcbs; +extern union tcp_listen_pcbs_t tcp_listen_pcbs; +extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a + state in which they accept or send + data. */ +extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */ + +#define NUM_TCP_PCB_LISTS_NO_TIME_WAIT 3 +#define NUM_TCP_PCB_LISTS 4 +extern struct tcp_pcb ** const tcp_pcb_lists[NUM_TCP_PCB_LISTS]; + +/* Axioms about the above lists: + 1) Every TCP PCB that is not CLOSED is in one of the lists. + 2) A PCB is only in one of the lists. + 3) All PCBs in the tcp_listen_pcbs list is in LISTEN state. + 4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state. +*/ +/* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB + with a PCB list or removes a PCB from a list, respectively. */ +#ifndef TCP_DEBUG_PCB_LISTS +#define TCP_DEBUG_PCB_LISTS 0 +#endif +#if TCP_DEBUG_PCB_LISTS +#define TCP_REG(pcbs, npcb) do {\ + struct tcp_pcb *tcp_tmp_pcb; \ + LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %"U16_F"\n", (void *)(npcb), (npcb)->local_port)); \ + for (tcp_tmp_pcb = *(pcbs); \ + tcp_tmp_pcb != NULL; \ + tcp_tmp_pcb = tcp_tmp_pcb->next) { \ + LWIP_ASSERT("TCP_REG: already registered", tcp_tmp_pcb != (npcb)); \ + } \ + LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", ((pcbs) == &tcp_bound_pcbs) || ((npcb)->state != CLOSED)); \ + (npcb)->next = *(pcbs); \ + LWIP_ASSERT("TCP_REG: npcb->next != npcb", (npcb)->next != (npcb)); \ + *(pcbs) = (npcb); \ + LWIP_ASSERT("TCP_REG: tcp_pcbs sane", tcp_pcbs_sane()); \ + tcp_timer_needed(); \ + } while(0) +#define TCP_RMV(pcbs, npcb) do { \ + struct tcp_pcb *tcp_tmp_pcb; \ + LWIP_ASSERT("TCP_RMV: pcbs != NULL", *(pcbs) != NULL); \ + LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", (void *)(npcb), (void *)(*(pcbs)))); \ + if(*(pcbs) == (npcb)) { \ + *(pcbs) = (*pcbs)->next; \ + } else for (tcp_tmp_pcb = *(pcbs); tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \ + if(tcp_tmp_pcb->next == (npcb)) { \ + tcp_tmp_pcb->next = (npcb)->next; \ + break; \ + } \ + } \ + (npcb)->next = NULL; \ + LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ + LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", (void *)(npcb), (void *)(*(pcbs)))); \ + } while(0) + +#else /* LWIP_DEBUG */ + +#define TCP_REG(pcbs, npcb) \ + do { \ + (npcb)->next = *pcbs; \ + *(pcbs) = (npcb); \ + tcp_timer_needed(); \ + } while (0) + +#define TCP_RMV(pcbs, npcb) \ + do { \ + if(*(pcbs) == (npcb)) { \ + (*(pcbs)) = (*pcbs)->next; \ + } \ + else { \ + struct tcp_pcb *tcp_tmp_pcb; \ + for (tcp_tmp_pcb = *pcbs; \ + tcp_tmp_pcb != NULL; \ + tcp_tmp_pcb = tcp_tmp_pcb->next) { \ + if(tcp_tmp_pcb->next == (npcb)) { \ + tcp_tmp_pcb->next = (npcb)->next; \ + break; \ + } \ + } \ + } \ + (npcb)->next = NULL; \ + } while(0) + +#endif /* LWIP_DEBUG */ + +#define TCP_REG_ACTIVE(npcb) \ + do { \ + TCP_REG(&tcp_active_pcbs, npcb); \ + tcp_active_pcbs_changed = 1; \ + } while (0) + +#define TCP_RMV_ACTIVE(npcb) \ + do { \ + TCP_RMV(&tcp_active_pcbs, npcb); \ + tcp_active_pcbs_changed = 1; \ + } while (0) + +#define TCP_PCB_REMOVE_ACTIVE(pcb) \ + do { \ + tcp_pcb_remove(&tcp_active_pcbs, pcb); \ + tcp_active_pcbs_changed = 1; \ + } while (0) + + +/* Internal functions: */ +struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb); +void tcp_pcb_purge(struct tcp_pcb *pcb); +void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb); + +void tcp_segs_free(struct tcp_seg *seg); +void tcp_seg_free(struct tcp_seg *seg); +struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg); + +#define tcp_ack(pcb) \ + do { \ + if((pcb)->flags & TF_ACK_DELAY) { \ + tcp_clear_flags(pcb, TF_ACK_DELAY); \ + tcp_ack_now(pcb); \ + } \ + else { \ + tcp_set_flags(pcb, TF_ACK_DELAY); \ + } \ + } while (0) + +#define tcp_ack_now(pcb) \ + tcp_set_flags(pcb, TF_ACK_NOW) + +err_t tcp_send_fin(struct tcp_pcb *pcb); +err_t tcp_enqueue_flags(struct tcp_pcb *pcb, u8_t flags); + +void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg); + +void tcp_rst(const struct tcp_pcb* pcb, u32_t seqno, u32_t ackno, + const ip_addr_t *local_ip, const ip_addr_t *remote_ip, + u16_t local_port, u16_t remote_port); +void tcp_rst_netif(struct netif *netif, u32_t seqno, u32_t ackno, + const ip_addr_t *local_ip, const ip_addr_t *remote_ip, + u16_t local_port, u16_t remote_port); + +u32_t tcp_next_iss(struct tcp_pcb *pcb); + +err_t tcp_keepalive(struct tcp_pcb *pcb); +err_t tcp_split_unsent_seg(struct tcp_pcb *pcb, u16_t split); +err_t tcp_zero_window_probe(struct tcp_pcb *pcb); +void tcp_trigger_input_pcb_close(void); + +#if TCP_CALCULATE_EFF_SEND_MSS +u16_t tcp_eff_send_mss_netif(u16_t sendmss, struct netif *outif, + const ip_addr_t *dest); +#define tcp_eff_send_mss(sendmss, src, dest) \ + tcp_eff_send_mss_netif(sendmss, ip_route(src, dest), dest) +#endif /* TCP_CALCULATE_EFF_SEND_MSS */ + +#if LWIP_CALLBACK_API +err_t tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err); +#endif /* LWIP_CALLBACK_API */ + +#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG +void tcp_debug_print(struct tcp_hdr *tcphdr); +void tcp_debug_print_flags(u8_t flags); +void tcp_debug_print_state(enum tcp_state s); +void tcp_debug_print_pcbs(void); +s16_t tcp_pcbs_sane(void); +#else +# define tcp_debug_print(tcphdr) +# define tcp_debug_print_flags(flags) +# define tcp_debug_print_state(s) +# define tcp_debug_print_pcbs() +# define tcp_pcbs_sane() 1 +#endif /* TCP_DEBUG */ + +/** External function (implemented in timers.c), called when TCP detects + * that a timer is needed (i.e. active- or time-wait-pcb found). */ +void tcp_timer_needed(void); + +void tcp_netif_ip_addr_changed(const ip_addr_t* old_addr, const ip_addr_t* new_addr); + +#if TCP_QUEUE_OOSEQ +void tcp_free_ooseq(struct tcp_pcb *pcb); +#endif + +#if LWIP_TCP_PCB_NUM_EXT_ARGS +err_t tcp_ext_arg_invoke_callbacks_passive_open(struct tcp_pcb_listen *lpcb, struct tcp_pcb *cpcb); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_TCP */ + +#endif /* LWIP_HDR_TCP_PRIV_H */ diff --git a/lib/lwip/include/lwip/priv/tcpip_priv.h b/lib/lwip/include/lwip/priv/tcpip_priv.h new file mode 100644 index 0000000000..bfa88ff6a6 --- /dev/null +++ b/lib/lwip/include/lwip/priv/tcpip_priv.h @@ -0,0 +1,176 @@ +/** + * @file + * TCPIP API internal implementations (do not use in application code) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_TCPIP_PRIV_H +#define LWIP_HDR_TCPIP_PRIV_H + +#include "lwip/opt.h" + +#if !NO_SYS /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/tcpip.h" +#include "lwip/sys.h" +#include "lwip/timeouts.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct pbuf; +struct netif; + +#if LWIP_MPU_COMPATIBLE +#define API_VAR_REF(name) (*(name)) +#define API_VAR_DECLARE(type, name) type * name +#define API_VAR_ALLOC_EXT(type, pool, name, errorblock) do { \ + name = (type *)memp_malloc(pool); \ + if (name == NULL) { \ + errorblock; \ + } \ + } while(0) +#define API_VAR_ALLOC(type, pool, name, errorval) API_VAR_ALLOC_EXT(type, pool, name, return errorval) +#define API_VAR_ALLOC_POOL(type, pool, name, errorval) do { \ + name = (type *)LWIP_MEMPOOL_ALLOC(pool); \ + if (name == NULL) { \ + return errorval; \ + } \ + } while(0) +#define API_VAR_FREE(pool, name) memp_free(pool, name) +#define API_VAR_FREE_POOL(pool, name) LWIP_MEMPOOL_FREE(pool, name) +#define API_EXPR_REF(expr) (&(expr)) +#if LWIP_NETCONN_SEM_PER_THREAD +#define API_EXPR_REF_SEM(expr) (expr) +#else +#define API_EXPR_REF_SEM(expr) API_EXPR_REF(expr) +#endif +#define API_EXPR_DEREF(expr) expr +#define API_MSG_M_DEF(m) m +#define API_MSG_M_DEF_C(t, m) t m +#else /* LWIP_MPU_COMPATIBLE */ +#define API_VAR_REF(name) name +#define API_VAR_DECLARE(type, name) type name +#define API_VAR_ALLOC_EXT(type, pool, name, errorblock) +#define API_VAR_ALLOC(type, pool, name, errorval) +#define API_VAR_ALLOC_POOL(type, pool, name, errorval) +#define API_VAR_FREE(pool, name) +#define API_VAR_FREE_POOL(pool, name) +#define API_EXPR_REF(expr) expr +#define API_EXPR_REF_SEM(expr) API_EXPR_REF(expr) +#define API_EXPR_DEREF(expr) (*(expr)) +#define API_MSG_M_DEF(m) *m +#define API_MSG_M_DEF_C(t, m) const t * m +#endif /* LWIP_MPU_COMPATIBLE */ + +err_t tcpip_send_msg_wait_sem(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem); + +struct tcpip_api_call_data +{ +#if !LWIP_TCPIP_CORE_LOCKING + err_t err; +#if !LWIP_NETCONN_SEM_PER_THREAD + sys_sem_t sem; +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ +#else /* !LWIP_TCPIP_CORE_LOCKING */ + u8_t dummy; /* avoid empty struct :-( */ +#endif /* !LWIP_TCPIP_CORE_LOCKING */ +}; +typedef err_t (*tcpip_api_call_fn)(struct tcpip_api_call_data* call); +err_t tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call_data *call); + +enum tcpip_msg_type { +#if !LWIP_TCPIP_CORE_LOCKING + TCPIP_MSG_API, + TCPIP_MSG_API_CALL, +#endif /* !LWIP_TCPIP_CORE_LOCKING */ +#if !LWIP_TCPIP_CORE_LOCKING_INPUT + TCPIP_MSG_INPKT, +#endif /* !LWIP_TCPIP_CORE_LOCKING_INPUT */ +#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS + TCPIP_MSG_TIMEOUT, + TCPIP_MSG_UNTIMEOUT, +#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */ + TCPIP_MSG_CALLBACK, + TCPIP_MSG_CALLBACK_STATIC, + TCPIP_MSG_CALLBACK_STATIC_WAIT +}; + +struct tcpip_msg { + enum tcpip_msg_type type; + union { +#if !LWIP_TCPIP_CORE_LOCKING + struct { + tcpip_callback_fn function; + void* msg; + } api_msg; + struct { + tcpip_api_call_fn function; + struct tcpip_api_call_data *arg; + sys_sem_t *sem; + } api_call; + struct { + tcpip_callback_fn function; + void *ctx; + sys_sem_t *sem; + } cb_wait; +#endif /* LWIP_TCPIP_CORE_LOCKING */ +#if !LWIP_TCPIP_CORE_LOCKING_INPUT + struct { + struct pbuf *p; + struct netif *netif; + netif_input_fn input_fn; + } inp; +#endif /* !LWIP_TCPIP_CORE_LOCKING_INPUT */ + struct { + tcpip_callback_fn function; + void *ctx; + } cb; +#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS + struct { + u32_t msecs; + sys_timeout_handler h; + void *arg; + } tmo; +#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */ + } msg; +}; + +#ifdef __cplusplus +} +#endif + +#endif /* !NO_SYS */ + +#endif /* LWIP_HDR_TCPIP_PRIV_H */ diff --git a/lib/lwip/include/lwip/prot/acd.h b/lib/lwip/include/lwip/prot/acd.h new file mode 100644 index 0000000000..860cae5bab --- /dev/null +++ b/lib/lwip/include/lwip/prot/acd.h @@ -0,0 +1,91 @@ +/** + * @file + * ACD protocol definitions + */ + +/* + * + * Copyright (c) 2007 Dominik Spies kontakt@dspies.de + * Copyright (c) 2018 Jasper Verschueren jasper.verschueren@apart-audio.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Jasper Verschueren jasper.verschueren@apart-audio.com + * Author: Dominik Spies kontakt@dspies.de + */ + +#ifndef LWIP_HDR_PROT_ACD_H +#define LWIP_HDR_PROT_ACD_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* RFC 5227 and RFC 3927 Constants */ +#define PROBE_WAIT 1 /* second (initial random delay) */ +#define PROBE_MIN 1 /* second (minimum delay till repeated probe) */ +#define PROBE_MAX 2 /* seconds (maximum delay till repeated probe) */ +#define PROBE_NUM 3 /* (number of probe packets) */ +#define ANNOUNCE_NUM 2 /* (number of announcement packets) */ +#define ANNOUNCE_INTERVAL 2 /* seconds (time between announcement packets) */ +#define ANNOUNCE_WAIT 2 /* seconds (delay before announcing) */ +#define MAX_CONFLICTS 10 /* (max conflicts before rate limiting) */ +#define RATE_LIMIT_INTERVAL 60 /* seconds (delay between successive attempts) */ +#define DEFEND_INTERVAL 10 /* seconds (minimum interval between defensive ARPs) */ + +/* ACD states */ +typedef enum { + /* ACD is module is off */ + ACD_STATE_OFF, + /* Waiting before probing can be started */ + ACD_STATE_PROBE_WAIT, + /* Probing the ipaddr */ + ACD_STATE_PROBING, + /* Waiting before announcing the probed ipaddr */ + ACD_STATE_ANNOUNCE_WAIT, + /* Announcing the new ipaddr */ + ACD_STATE_ANNOUNCING, + /* Performing ongoing conflict detection with one defend within defend inferval */ + ACD_STATE_ONGOING, + /* Performing ongoing conflict detection but immediately back off and Release + * the address when a conflict occurs. This state is used for LL addresses + * that stay active even if the netif has a routable address selected. + * In such a case, we cannot defend our address */ + ACD_STATE_PASSIVE_ONGOING, + /* To many conflicts occurred, we need to wait before restarting the selection + * process */ + ACD_STATE_RATE_LIMIT +} acd_state_enum_t; + +typedef enum { + ACD_IP_OK, /* IP address is good, no conflicts found in checking state */ + ACD_RESTART_CLIENT, /* Conflict found -> the client should try again */ + ACD_DECLINE /* Decline the received IP address (rate limiting)*/ +} acd_callback_enum_t; + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_ACD_H */ diff --git a/lib/lwip/include/lwip/prot/autoip.h b/lib/lwip/include/lwip/prot/autoip.h new file mode 100644 index 0000000000..adbb1668e7 --- /dev/null +++ b/lib/lwip/include/lwip/prot/autoip.h @@ -0,0 +1,65 @@ +/** + * @file + * AutoIP protocol definitions + */ + +/* + * + * Copyright (c) 2007 Dominik Spies kontakt@dspies.de + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dominik Spies kontakt@dspies.de + * + * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform + * with RFC 3927. + * + */ + +#ifndef LWIP_HDR_PROT_AUTOIP_H +#define LWIP_HDR_PROT_AUTOIP_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* 169.254.0.0 */ +#define AUTOIP_NET 0xA9FE0000 +/* 169.254.1.0 */ +#define AUTOIP_RANGE_START (AUTOIP_NET | 0x0100) +/* 169.254.254.255 */ +#define AUTOIP_RANGE_END (AUTOIP_NET | 0xFEFF) + +/* AutoIP client states */ +typedef enum { + AUTOIP_STATE_OFF, + AUTOIP_STATE_CHECKING, + AUTOIP_STATE_BOUND +} autoip_state_enum_t; + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_AUTOIP_H */ diff --git a/lib/lwip/include/lwip/prot/dhcp.h b/lib/lwip/include/lwip/prot/dhcp.h new file mode 100644 index 0000000000..ab18dca313 --- /dev/null +++ b/lib/lwip/include/lwip/prot/dhcp.h @@ -0,0 +1,178 @@ +/** + * @file + * DHCP protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Leon Woestenberg leon.woestenberg@gmx.net + * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Leon Woestenberg leon.woestenberg@gmx.net + * + */ +#ifndef LWIP_HDR_PROT_DHCP_H +#define LWIP_HDR_PROT_DHCP_H + +#include "lwip/opt.h" +#include "lwip/arch.h" +#include "lwip/prot/ip4.h" + +#ifdef __cplusplus +extern "C" { +#endif + + /* DHCP message item offsets and length */ +#define DHCP_CHADDR_LEN 16U +#define DHCP_SNAME_OFS 44U +#define DHCP_SNAME_LEN 64U +#define DHCP_FILE_OFS 108U +#define DHCP_FILE_LEN 128U +#define DHCP_MSG_LEN 236U +#define DHCP_OPTIONS_OFS (DHCP_MSG_LEN + 4U) /* 4 byte: cookie */ + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** minimum set of fields of any DHCP message */ +struct dhcp_msg +{ + PACK_STRUCT_FLD_8(u8_t op); + PACK_STRUCT_FLD_8(u8_t htype); + PACK_STRUCT_FLD_8(u8_t hlen); + PACK_STRUCT_FLD_8(u8_t hops); + PACK_STRUCT_FIELD(u32_t xid); + PACK_STRUCT_FIELD(u16_t secs); + PACK_STRUCT_FIELD(u16_t flags); + PACK_STRUCT_FLD_S(ip4_addr_p_t ciaddr); + PACK_STRUCT_FLD_S(ip4_addr_p_t yiaddr); + PACK_STRUCT_FLD_S(ip4_addr_p_t siaddr); + PACK_STRUCT_FLD_S(ip4_addr_p_t giaddr); + PACK_STRUCT_FLD_8(u8_t chaddr[DHCP_CHADDR_LEN]); + PACK_STRUCT_FLD_8(u8_t sname[DHCP_SNAME_LEN]); + PACK_STRUCT_FLD_8(u8_t file[DHCP_FILE_LEN]); + PACK_STRUCT_FIELD(u32_t cookie); +#define DHCP_MIN_OPTIONS_LEN 68U +/** make sure user does not configure this too small */ +#if ((defined(DHCP_OPTIONS_LEN)) && (DHCP_OPTIONS_LEN < DHCP_MIN_OPTIONS_LEN)) +# undef DHCP_OPTIONS_LEN +#endif +/** allow this to be configured in lwipopts.h, but not too small */ +#if (!defined(DHCP_OPTIONS_LEN)) +/** set this to be sufficient for your options in outgoing DHCP msgs */ +# define DHCP_OPTIONS_LEN DHCP_MIN_OPTIONS_LEN +#endif + PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + + +/* DHCP client states */ +typedef enum { + DHCP_STATE_OFF = 0, + DHCP_STATE_REQUESTING = 1, + DHCP_STATE_INIT = 2, + DHCP_STATE_REBOOTING = 3, + DHCP_STATE_REBINDING = 4, + DHCP_STATE_RENEWING = 5, + DHCP_STATE_SELECTING = 6, + DHCP_STATE_INFORMING = 7, + DHCP_STATE_CHECKING = 8, + DHCP_STATE_PERMANENT = 9, /* not yet implemented */ + DHCP_STATE_BOUND = 10, + DHCP_STATE_RELEASING = 11, /* not yet implemented */ + DHCP_STATE_BACKING_OFF = 12 +} dhcp_state_enum_t; + +/* DHCP op codes */ +#define DHCP_BOOTREQUEST 1 +#define DHCP_BOOTREPLY 2 + +/* DHCP message types */ +#define DHCP_DISCOVER 1 +#define DHCP_OFFER 2 +#define DHCP_REQUEST 3 +#define DHCP_DECLINE 4 +#define DHCP_ACK 5 +#define DHCP_NAK 6 +#define DHCP_RELEASE 7 +#define DHCP_INFORM 8 + +#define DHCP_MAGIC_COOKIE 0x63825363UL + +/* This is a list of options for BOOTP and DHCP, see RFC 2132 for descriptions */ + +/* BootP options */ +#define DHCP_OPTION_PAD 0 +#define DHCP_OPTION_SUBNET_MASK 1 /* RFC 2132 3.3 */ +#define DHCP_OPTION_ROUTER 3 +#define DHCP_OPTION_DNS_SERVER 6 +#define DHCP_OPTION_HOSTNAME 12 +#define DHCP_OPTION_IP_TTL 23 +#define DHCP_OPTION_MTU 26 +#define DHCP_OPTION_BROADCAST 28 +#define DHCP_OPTION_TCP_TTL 37 +#define DHCP_OPTION_NTP 42 +#define DHCP_OPTION_END 255 + +/* DHCP options */ +#define DHCP_OPTION_REQUESTED_IP 50 /* RFC 2132 9.1, requested IP address */ +#define DHCP_OPTION_LEASE_TIME 51 /* RFC 2132 9.2, time in seconds, in 4 bytes */ +#define DHCP_OPTION_OVERLOAD 52 /* RFC2132 9.3, use file and/or sname field for options */ + +#define DHCP_OPTION_MESSAGE_TYPE 53 /* RFC 2132 9.6, important for DHCP */ +#define DHCP_OPTION_MESSAGE_TYPE_LEN 1 + +#define DHCP_OPTION_SERVER_ID 54 /* RFC 2132 9.7, server IP address */ +#define DHCP_OPTION_PARAMETER_REQUEST_LIST 55 /* RFC 2132 9.8, requested option types */ + +#define DHCP_OPTION_MAX_MSG_SIZE 57 /* RFC 2132 9.10, message size accepted >= 576 */ +#define DHCP_OPTION_MAX_MSG_SIZE_LEN 2 + +#define DHCP_OPTION_T1 58 /* T1 renewal time */ +#define DHCP_OPTION_T2 59 /* T2 rebinding time */ +#define DHCP_OPTION_US 60 +#define DHCP_OPTION_CLIENT_ID 61 +#define DHCP_OPTION_TFTP_SERVERNAME 66 +#define DHCP_OPTION_BOOTFILE 67 + +/* possible combinations of overloading the file and sname fields with options */ +#define DHCP_OVERLOAD_NONE 0 +#define DHCP_OVERLOAD_FILE 1 +#define DHCP_OVERLOAD_SNAME 2 +#define DHCP_OVERLOAD_SNAME_FILE 3 + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_DHCP_H */ diff --git a/lib/lwip/include/lwip/prot/dhcp6.h b/lib/lwip/include/lwip/prot/dhcp6.h new file mode 100644 index 0000000000..0754c91b9b --- /dev/null +++ b/lib/lwip/include/lwip/prot/dhcp6.h @@ -0,0 +1,138 @@ +/** + * @file + * DHCPv6 protocol definitions + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt goldsimon@gmx.de + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ +#ifndef LWIP_HDR_PROT_DHCP6_H +#define LWIP_HDR_PROT_DHCP6_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define DHCP6_CLIENT_PORT 546 +#define DHCP6_SERVER_PORT 547 + + + /* DHCPv6 message item offsets and length */ +#define DHCP6_TRANSACTION_ID_LEN 3 + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** minimum set of fields of any DHCPv6 message */ +struct dhcp6_msg +{ + PACK_STRUCT_FLD_8(u8_t msgtype); + PACK_STRUCT_FLD_8(u8_t transaction_id[DHCP6_TRANSACTION_ID_LEN]); + /* options follow */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + + +/* DHCP6 client states */ +typedef enum { + DHCP6_STATE_OFF = 0, + DHCP6_STATE_STATELESS_IDLE = 1, + DHCP6_STATE_REQUESTING_CONFIG = 2 +} dhcp6_state_enum_t; + +/* DHCPv6 message types */ +#define DHCP6_SOLICIT 1 +#define DHCP6_ADVERTISE 2 +#define DHCP6_REQUEST 3 +#define DHCP6_CONFIRM 4 +#define DHCP6_RENEW 5 +#define DHCP6_REBIND 6 +#define DHCP6_REPLY 7 +#define DHCP6_RELEASE 8 +#define DHCP6_DECLINE 9 +#define DHCP6_RECONFIGURE 10 +#define DHCP6_INFOREQUEST 11 +#define DHCP6_RELAYFORW 12 +#define DHCP6_RELAYREPL 13 +/* More message types see https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml */ + +/** DHCPv6 status codes */ +#define DHCP6_STATUS_SUCCESS 0 /* Success. */ +#define DHCP6_STATUS_UNSPECFAIL 1 /* Failure, reason unspecified; this status code is sent by either a client or a server to indicate a failure not explicitly specified in this document. */ +#define DHCP6_STATUS_NOADDRSAVAIL 2 /* Server has no addresses available to assign to the IA(s). */ +#define DHCP6_STATUS_NOBINDING 3 /* Client record (binding) unavailable. */ +#define DHCP6_STATUS_NOTONLINK 4 /* The prefix for the address is not appropriate for the link to which the client is attached. */ +#define DHCP6_STATUS_USEMULTICAST 5 /* Sent by a server to a client to force the client to send messages to the server using the All_DHCP_Relay_Agents_and_Servers address. */ +/* More status codes see https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml */ + +/** DHCPv6 DUID types */ +#define DHCP6_DUID_LLT 1 /* LLT: Link-layer Address Plus Time */ +#define DHCP6_DUID_EN 2 /* EN: Enterprise number */ +#define DHCP6_DUID_LL 3 /* LL: Link-layer Address */ +#define DHCP6_DUID_UUID 4 /* UUID (RFC 6355) */ + +/* DHCPv6 options */ +#define DHCP6_OPTION_CLIENTID 1 +#define DHCP6_OPTION_SERVERID 2 +#define DHCP6_OPTION_IA_NA 3 +#define DHCP6_OPTION_IA_TA 4 +#define DHCP6_OPTION_IAADDR 5 +#define DHCP6_OPTION_ORO 6 +#define DHCP6_OPTION_PREFERENCE 7 +#define DHCP6_OPTION_ELAPSED_TIME 8 +#define DHCP6_OPTION_RELAY_MSG 9 +#define DHCP6_OPTION_AUTH 11 +#define DHCP6_OPTION_UNICAST 12 +#define DHCP6_OPTION_STATUS_CODE 13 +#define DHCP6_OPTION_RAPID_COMMIT 14 +#define DHCP6_OPTION_USER_CLASS 15 +#define DHCP6_OPTION_VENDOR_CLASS 16 +#define DHCP6_OPTION_VENDOR_OPTS 17 +#define DHCP6_OPTION_INTERFACE_ID 18 +#define DHCP6_OPTION_RECONF_MSG 19 +#define DHCP6_OPTION_RECONF_ACCEPT 20 +/* More options see https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml */ +#define DHCP6_OPTION_DNS_SERVERS 23 /* RFC 3646 */ +#define DHCP6_OPTION_DOMAIN_LIST 24 /* RFC 3646 */ +#define DHCP6_OPTION_SNTP_SERVERS 31 /* RFC 4075 */ + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_DHCP6_H */ diff --git a/lib/lwip/include/lwip/prot/dns.h b/lib/lwip/include/lwip/prot/dns.h new file mode 100644 index 0000000000..94782d6e9c --- /dev/null +++ b/lib/lwip/include/lwip/prot/dns.h @@ -0,0 +1,140 @@ +/** + * @file + * DNS - host name to IP address resolver. + */ + +/* + * Port to lwIP from uIP + * by Jim Pettinato April 2007 + * + * security fixes and more by Simon Goldschmidt + * + * uIP version Copyright (c) 2002-2003, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef LWIP_HDR_PROT_DNS_H +#define LWIP_HDR_PROT_DNS_H + +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** DNS server port address */ +#ifndef DNS_SERVER_PORT +#define DNS_SERVER_PORT 53 +#endif + +/* DNS field TYPE used for "Resource Records" */ +#define DNS_RRTYPE_A 1 /* a host address */ +#define DNS_RRTYPE_NS 2 /* an authoritative name server */ +#define DNS_RRTYPE_MD 3 /* a mail destination (Obsolete - use MX) */ +#define DNS_RRTYPE_MF 4 /* a mail forwarder (Obsolete - use MX) */ +#define DNS_RRTYPE_CNAME 5 /* the canonical name for an alias */ +#define DNS_RRTYPE_SOA 6 /* marks the start of a zone of authority */ +#define DNS_RRTYPE_MB 7 /* a mailbox domain name (EXPERIMENTAL) */ +#define DNS_RRTYPE_MG 8 /* a mail group member (EXPERIMENTAL) */ +#define DNS_RRTYPE_MR 9 /* a mail rename domain name (EXPERIMENTAL) */ +#define DNS_RRTYPE_NULL 10 /* a null RR (EXPERIMENTAL) */ +#define DNS_RRTYPE_WKS 11 /* a well known service description */ +#define DNS_RRTYPE_PTR 12 /* a domain name pointer */ +#define DNS_RRTYPE_HINFO 13 /* host information */ +#define DNS_RRTYPE_MINFO 14 /* mailbox or mail list information */ +#define DNS_RRTYPE_MX 15 /* mail exchange */ +#define DNS_RRTYPE_TXT 16 /* text strings */ +#define DNS_RRTYPE_AAAA 28 /* IPv6 address */ +#define DNS_RRTYPE_SRV 33 /* service location */ +#define DNS_RRTYPE_ANY 255 /* any type */ + +/* DNS field CLASS used for "Resource Records" */ +#define DNS_RRCLASS_IN 1 /* the Internet */ +#define DNS_RRCLASS_CS 2 /* the CSNET class (Obsolete - used only for examples in some obsolete RFCs) */ +#define DNS_RRCLASS_CH 3 /* the CHAOS class */ +#define DNS_RRCLASS_HS 4 /* Hesiod [Dyer 87] */ +#define DNS_RRCLASS_ANY 255 /* any class */ +#define DNS_RRCLASS_FLUSH 0x800 /* Flush bit */ + +/* DNS protocol flags */ +#define DNS_FLAG1_RESPONSE 0x80 +#define DNS_FLAG1_OPCODE_STATUS 0x10 +#define DNS_FLAG1_OPCODE_INVERSE 0x08 +#define DNS_FLAG1_OPCODE_STANDARD 0x00 +#define DNS_FLAG1_AUTHORATIVE 0x04 +#define DNS_FLAG1_TRUNC 0x02 +#define DNS_FLAG1_RD 0x01 +#define DNS_FLAG2_RA 0x80 +#define DNS_FLAG2_ERR_MASK 0x0f +#define DNS_FLAG2_ERR_NONE 0x00 +#define DNS_FLAG2_ERR_NAME 0x03 + +#define DNS_HDR_GET_OPCODE(hdr) ((((hdr)->flags1) >> 3) & 0xF) + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** DNS message header */ +struct dns_hdr { + PACK_STRUCT_FIELD(u16_t id); + PACK_STRUCT_FLD_8(u8_t flags1); + PACK_STRUCT_FLD_8(u8_t flags2); + PACK_STRUCT_FIELD(u16_t numquestions); + PACK_STRUCT_FIELD(u16_t numanswers); + PACK_STRUCT_FIELD(u16_t numauthrr); + PACK_STRUCT_FIELD(u16_t numextrarr); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define SIZEOF_DNS_HDR 12 + + +/* Multicast DNS definitions */ + +/** UDP port for multicast DNS queries */ +#ifndef DNS_MQUERY_PORT +#define DNS_MQUERY_PORT 5353 +#endif + +/* IPv4 group for multicast DNS queries: 224.0.0.251 */ +#ifndef DNS_MQUERY_IPV4_GROUP_INIT +#define DNS_MQUERY_IPV4_GROUP_INIT IPADDR4_INIT_BYTES(224,0,0,251) +#endif + +/* IPv6 group for multicast DNS queries: FF02::FB */ +#ifndef DNS_MQUERY_IPV6_GROUP_INIT +#define DNS_MQUERY_IPV6_GROUP_INIT IPADDR6_INIT_HOST(0xFF020000,0,0,0xFB) +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_DNS_H */ diff --git a/lib/lwip/include/lwip/prot/etharp.h b/lib/lwip/include/lwip/prot/etharp.h new file mode 100644 index 0000000000..811c228417 --- /dev/null +++ b/lib/lwip/include/lwip/prot/etharp.h @@ -0,0 +1,114 @@ +/** + * @file + * ARP protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_ETHARP_H +#define LWIP_HDR_PROT_ETHARP_H + +#include "lwip/arch.h" +#include "lwip/prot/ethernet.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef ETHARP_HWADDR_LEN +#define ETHARP_HWADDR_LEN ETH_HWADDR_LEN +#endif + +/** + * struct ip4_addr_wordaligned is used in the definition of the ARP packet format in + * order to support compilers that don't have structure packing. + */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip4_addr_wordaligned { + PACK_STRUCT_FIELD(u16_t addrw[2]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** MEMCPY-like copying of IP addresses where addresses are known to be + * 16-bit-aligned if the port is correctly configured (so a port could define + * this to copying 2 u16_t's) - no NULL-pointer-checking needed. */ +#ifndef IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T +#define IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T(dest, src) SMEMCPY(dest, src, sizeof(ip4_addr_t)) +#endif + + /** MEMCPY-like copying of IP addresses where addresses are known to be + * 16-bit-aligned if the port is correctly configured (so a port could define + * this to copying 2 u16_t's) - no NULL-pointer-checking needed. */ +#ifndef IPADDR_WORDALIGNED_COPY_FROM_IP4_ADDR_T +#define IPADDR_WORDALIGNED_COPY_FROM_IP4_ADDR_T(dest, src) SMEMCPY(dest, src, sizeof(ip4_addr_t)) +#endif + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** the ARP message, see RFC 826 ("Packet format") */ +struct etharp_hdr { + PACK_STRUCT_FIELD(u16_t hwtype); + PACK_STRUCT_FIELD(u16_t proto); + PACK_STRUCT_FLD_8(u8_t hwlen); + PACK_STRUCT_FLD_8(u8_t protolen); + PACK_STRUCT_FIELD(u16_t opcode); + PACK_STRUCT_FLD_S(struct eth_addr shwaddr); + PACK_STRUCT_FLD_S(struct ip4_addr_wordaligned sipaddr); + PACK_STRUCT_FLD_S(struct eth_addr dhwaddr); + PACK_STRUCT_FLD_S(struct ip4_addr_wordaligned dipaddr); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define SIZEOF_ETHARP_HDR 28 + +/* ARP message types (opcodes) */ +enum etharp_opcode { + ARP_REQUEST = 1, + ARP_REPLY = 2 +}; + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_ETHARP_H */ diff --git a/lib/lwip/include/lwip/prot/ethernet.h b/lib/lwip/include/lwip/prot/ethernet.h new file mode 100644 index 0000000000..d16b604089 --- /dev/null +++ b/lib/lwip/include/lwip/prot/ethernet.h @@ -0,0 +1,127 @@ +/** + * @file + * Ethernet protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_ETHERNET_H +#define LWIP_HDR_PROT_ETHERNET_H + +#include "lwip/arch.h" +#include "lwip/prot/ieee.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef ETH_HWADDR_LEN +#ifdef ETHARP_HWADDR_LEN +#define ETH_HWADDR_LEN ETHARP_HWADDR_LEN /* compatibility mode */ +#else +#define ETH_HWADDR_LEN 6 +#endif +#endif + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** An Ethernet MAC address */ +struct eth_addr { + PACK_STRUCT_FLD_8(u8_t addr[ETH_HWADDR_LEN]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Initialize a struct eth_addr with its 6 bytes (takes care of correct braces) */ +#define ETH_ADDR(b0, b1, b2, b3, b4, b5) {{b0, b1, b2, b3, b4, b5}} + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** Ethernet header */ +struct eth_hdr { +#if ETH_PAD_SIZE + PACK_STRUCT_FLD_8(u8_t padding[ETH_PAD_SIZE]); +#endif + PACK_STRUCT_FLD_S(struct eth_addr dest); + PACK_STRUCT_FLD_S(struct eth_addr src); + PACK_STRUCT_FIELD(u16_t type); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define SIZEOF_ETH_HDR (14 + ETH_PAD_SIZE) + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** VLAN header inserted between ethernet header and payload + * if 'type' in ethernet header is ETHTYPE_VLAN. + * See IEEE802.Q */ +struct eth_vlan_hdr { + PACK_STRUCT_FIELD(u16_t prio_vid); + PACK_STRUCT_FIELD(u16_t tpid); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define SIZEOF_VLAN_HDR 4 +#define VLAN_ID(vlan_hdr) (lwip_htons((vlan_hdr)->prio_vid) & 0xFFF) + +/** The 24-bit IANA IPv4-multicast OUI is 01-00-5e: */ +#define LL_IP4_MULTICAST_ADDR_0 0x01 +#define LL_IP4_MULTICAST_ADDR_1 0x00 +#define LL_IP4_MULTICAST_ADDR_2 0x5e + +/** IPv6 multicast uses this prefix */ +#define LL_IP6_MULTICAST_ADDR_0 0x33 +#define LL_IP6_MULTICAST_ADDR_1 0x33 + +/* eth_addr_cmp is deprecated, use eth_addr_eq */ +#define eth_addr_cmp(addr1, addr2) eth_addr_eq((addr1), (addr2)) +#define eth_addr_eq(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETH_HWADDR_LEN) == 0) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_ETHERNET_H */ diff --git a/lib/lwip/include/lwip/prot/iana.h b/lib/lwip/include/lwip/prot/iana.h new file mode 100644 index 0000000000..32890cccd3 --- /dev/null +++ b/lib/lwip/include/lwip/prot/iana.h @@ -0,0 +1,97 @@ +/** + * @file + * IANA assigned numbers (RFC 1700 and successors) + * + * @defgroup iana IANA assigned numbers + * @ingroup infrastructure + */ + +/* + * Copyright (c) 2017 Dirk Ziegelmeier. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Dirk Ziegelmeier dziegel@gmx.de + * + */ + +#ifndef LWIP_HDR_PROT_IANA_H +#define LWIP_HDR_PROT_IANA_H + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @ingroup iana + * Hardware types + */ +enum lwip_iana_hwtype { + /** Ethernet */ + LWIP_IANA_HWTYPE_ETHERNET = 1 +}; + +/** + * @ingroup iana + * Port numbers + * https://www.iana.org/assignments/service-names-port-numbers/service-names-po... + */ +enum lwip_iana_port_number { + /** SMTP */ + LWIP_IANA_PORT_SMTP = 25, + /** DHCP server */ + LWIP_IANA_PORT_DHCP_SERVER = 67, + /** DHCP client */ + LWIP_IANA_PORT_DHCP_CLIENT = 68, + /** TFTP */ + LWIP_IANA_PORT_TFTP = 69, + /** HTTP */ + LWIP_IANA_PORT_HTTP = 80, + /** SNTP */ + LWIP_IANA_PORT_SNTP = 123, + /** NETBIOS */ + LWIP_IANA_PORT_NETBIOS = 137, + /** SNMP */ + LWIP_IANA_PORT_SNMP = 161, + /** SNMP traps */ + LWIP_IANA_PORT_SNMP_TRAP = 162, + /** HTTPS */ + LWIP_IANA_PORT_HTTPS = 443, + /** SMTPS */ + LWIP_IANA_PORT_SMTPS = 465, + /** MQTT */ + LWIP_IANA_PORT_MQTT = 1883, + /** MDNS */ + LWIP_IANA_PORT_MDNS = 5353, + /** Secure MQTT */ + LWIP_IANA_PORT_SECURE_MQTT = 8883 +}; + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_IANA_H */ diff --git a/lib/lwip/include/lwip/prot/icmp.h b/lib/lwip/include/lwip/prot/icmp.h new file mode 100644 index 0000000000..1fe12d9625 --- /dev/null +++ b/lib/lwip/include/lwip/prot/icmp.h @@ -0,0 +1,105 @@ +/** + * @file + * ICMP protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_ICMP_H +#define LWIP_HDR_PROT_ICMP_H + +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define ICMP_ER 0 /* echo reply */ +#define ICMP_DUR 3 /* destination unreachable */ +#define ICMP_SQ 4 /* source quench */ +#define ICMP_RD 5 /* redirect */ +#define ICMP_ECHO 8 /* echo */ +#define ICMP_TE 11 /* time exceeded */ +#define ICMP_PP 12 /* parameter problem */ +#define ICMP_TS 13 /* timestamp */ +#define ICMP_TSR 14 /* timestamp reply */ +#define ICMP_IRQ 15 /* information request */ +#define ICMP_IR 16 /* information reply */ +#define ICMP_AM 17 /* address mask request */ +#define ICMP_AMR 18 /* address mask reply */ + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +/** The standard ICMP header (unspecified 32 bit data) */ +PACK_STRUCT_BEGIN +struct icmp_hdr { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u32_t data); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/* Compatibility defines, old versions used to combine type and code to an u16_t */ +#define ICMPH_TYPE(hdr) ((hdr)->type) +#define ICMPH_CODE(hdr) ((hdr)->code) +#define ICMPH_TYPE_SET(hdr, t) ((hdr)->type = (t)) +#define ICMPH_CODE_SET(hdr, c) ((hdr)->code = (c)) + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +/** This is the standard ICMP header only that the u32_t data + * is split to two u16_t like ICMP echo needs it. + */ +PACK_STRUCT_BEGIN +struct icmp_echo_hdr { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u16_t id); + PACK_STRUCT_FIELD(u16_t seqno); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_ICMP_H */ diff --git a/lib/lwip/include/lwip/prot/icmp6.h b/lib/lwip/include/lwip/prot/icmp6.h new file mode 100644 index 0000000000..36989f6b32 --- /dev/null +++ b/lib/lwip/include/lwip/prot/icmp6.h @@ -0,0 +1,172 @@ +/** + * @file + * ICMP6 protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_ICMP6_H +#define LWIP_HDR_PROT_ICMP6_H + +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** ICMP type */ +enum icmp6_type { + /** Destination unreachable */ + ICMP6_TYPE_DUR = 1, + /** Packet too big */ + ICMP6_TYPE_PTB = 2, + /** Time exceeded */ + ICMP6_TYPE_TE = 3, + /** Parameter problem */ + ICMP6_TYPE_PP = 4, + /** Private experimentation */ + ICMP6_TYPE_PE1 = 100, + /** Private experimentation */ + ICMP6_TYPE_PE2 = 101, + /** Reserved for expansion of error messages */ + ICMP6_TYPE_RSV_ERR = 127, + + /** Echo request */ + ICMP6_TYPE_EREQ = 128, + /** Echo reply */ + ICMP6_TYPE_EREP = 129, + /** Multicast listener query */ + ICMP6_TYPE_MLQ = 130, + /** Multicast listener report */ + ICMP6_TYPE_MLR = 131, + /** Multicast listener done */ + ICMP6_TYPE_MLD = 132, + /** Router solicitation */ + ICMP6_TYPE_RS = 133, + /** Router advertisement */ + ICMP6_TYPE_RA = 134, + /** Neighbor solicitation */ + ICMP6_TYPE_NS = 135, + /** Neighbor advertisement */ + ICMP6_TYPE_NA = 136, + /** Redirect */ + ICMP6_TYPE_RD = 137, + /** Multicast router advertisement */ + ICMP6_TYPE_MRA = 151, + /** Multicast router solicitation */ + ICMP6_TYPE_MRS = 152, + /** Multicast router termination */ + ICMP6_TYPE_MRT = 153, + /** Private experimentation */ + ICMP6_TYPE_PE3 = 200, + /** Private experimentation */ + ICMP6_TYPE_PE4 = 201, + /** Reserved for expansion of informational messages */ + ICMP6_TYPE_RSV_INF = 255 +}; + +/** ICMP destination unreachable codes */ +enum icmp6_dur_code { + /** No route to destination */ + ICMP6_DUR_NO_ROUTE = 0, + /** Communication with destination administratively prohibited */ + ICMP6_DUR_PROHIBITED = 1, + /** Beyond scope of source address */ + ICMP6_DUR_SCOPE = 2, + /** Address unreachable */ + ICMP6_DUR_ADDRESS = 3, + /** Port unreachable */ + ICMP6_DUR_PORT = 4, + /** Source address failed ingress/egress policy */ + ICMP6_DUR_POLICY = 5, + /** Reject route to destination */ + ICMP6_DUR_REJECT_ROUTE = 6 +}; + +/** ICMP time exceeded codes */ +enum icmp6_te_code { + /** Hop limit exceeded in transit */ + ICMP6_TE_HL = 0, + /** Fragment reassembly time exceeded */ + ICMP6_TE_FRAG = 1 +}; + +/** ICMP parameter code */ +enum icmp6_pp_code { + /** Erroneous header field encountered */ + ICMP6_PP_FIELD = 0, + /** Unrecognized next header type encountered */ + ICMP6_PP_HEADER = 1, + /** Unrecognized IPv6 option encountered */ + ICMP6_PP_OPTION = 2 +}; + +/** This is the standard ICMP6 header. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct icmp6_hdr { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u32_t data); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define ICMP6_HLEN 8 + +/** This is the ICMP6 header adapted for echo req/resp. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct icmp6_echo_hdr { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u16_t id); + PACK_STRUCT_FIELD(u16_t seqno); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_ICMP6_H */ diff --git a/lib/lwip/include/lwip/prot/ieee.h b/lib/lwip/include/lwip/prot/ieee.h new file mode 100644 index 0000000000..cd4d2dea30 --- /dev/null +++ b/lib/lwip/include/lwip/prot/ieee.h @@ -0,0 +1,91 @@ +/** + * @file + * IEEE assigned numbers + * + * @defgroup ieee IEEE assigned numbers + * @ingroup infrastructure + */ + +/* + * Copyright (c) 2017 Dirk Ziegelmeier. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Dirk Ziegelmeier dziegel@gmx.de + * + */ + +#ifndef LWIP_HDR_PROT_IEEE_H +#define LWIP_HDR_PROT_IEEE_H + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @ingroup ieee + * A list of often ethtypes (although lwIP does not use all of them). + */ +enum lwip_ieee_eth_type { + /** Internet protocol v4 */ + ETHTYPE_IP = 0x0800U, + /** Address resolution protocol */ + ETHTYPE_ARP = 0x0806U, + /** Wake on lan */ + ETHTYPE_WOL = 0x0842U, + /** RARP */ + ETHTYPE_RARP = 0x8035U, + /** Virtual local area network */ + ETHTYPE_VLAN = 0x8100U, + /** Internet protocol v6 */ + ETHTYPE_IPV6 = 0x86DDU, + /** PPP Over Ethernet Discovery Stage */ + ETHTYPE_PPPOEDISC = 0x8863U, + /** PPP Over Ethernet Session Stage */ + ETHTYPE_PPPOE = 0x8864U, + /** Jumbo Frames */ + ETHTYPE_JUMBO = 0x8870U, + /** Process field network */ + ETHTYPE_PROFINET = 0x8892U, + /** Ethernet for control automation technology */ + ETHTYPE_ETHERCAT = 0x88A4U, + /** Link layer discovery protocol */ + ETHTYPE_LLDP = 0x88CCU, + /** Serial real-time communication system */ + ETHTYPE_SERCOS = 0x88CDU, + /** Media redundancy protocol */ + ETHTYPE_MRP = 0x88E3U, + /** Precision time protocol */ + ETHTYPE_PTP = 0x88F7U, + /** Q-in-Q, 802.1ad */ + ETHTYPE_QINQ = 0x9100U +}; + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_IEEE_H */ diff --git a/lib/lwip/include/lwip/prot/igmp.h b/lib/lwip/include/lwip/prot/igmp.h new file mode 100644 index 0000000000..46b81a9dd3 --- /dev/null +++ b/lib/lwip/include/lwip/prot/igmp.h @@ -0,0 +1,90 @@ +/** + * @file + * IGMP protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_IGMP_H +#define LWIP_HDR_PROT_IGMP_H + +#include "lwip/arch.h" +#include "lwip/prot/ip4.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * IGMP constants + */ +#define IGMP_TTL 1 +#define IGMP_MINLEN 8 +#define ROUTER_ALERT 0x9404U +#define ROUTER_ALERTLEN 4 + +/* + * IGMP message types, including version number. + */ +#define IGMP_MEMB_QUERY 0x11 /* Membership query */ +#define IGMP_V1_MEMB_REPORT 0x12 /* Ver. 1 membership report */ +#define IGMP_V2_MEMB_REPORT 0x16 /* Ver. 2 membership report */ +#define IGMP_LEAVE_GROUP 0x17 /* Leave-group message */ + +/* Group membership states */ +#define IGMP_GROUP_NON_MEMBER 0 +#define IGMP_GROUP_DELAYING_MEMBER 1 +#define IGMP_GROUP_IDLE_MEMBER 2 + +/** + * IGMP packet format. + */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct igmp_msg { + PACK_STRUCT_FLD_8(u8_t igmp_msgtype); + PACK_STRUCT_FLD_8(u8_t igmp_maxresp); + PACK_STRUCT_FIELD(u16_t igmp_checksum); + PACK_STRUCT_FLD_S(ip4_addr_p_t igmp_group_address); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_IGMP_H */ diff --git a/lib/lwip/include/lwip/prot/ip.h b/lib/lwip/include/lwip/prot/ip.h new file mode 100644 index 0000000000..223158f5ac --- /dev/null +++ b/lib/lwip/include/lwip/prot/ip.h @@ -0,0 +1,59 @@ +/** + * @file + * IP protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_IP_H +#define LWIP_HDR_PROT_IP_H + +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define IP_PROTO_ICMP 1 +#define IP_PROTO_IGMP 2 +#define IP_PROTO_UDP 17 +#define IP_PROTO_UDPLITE 136 +#define IP_PROTO_TCP 6 + +/** This operates on a void* by loading the first byte */ +#define IP_HDR_GET_VERSION(ptr) ((*(u8_t*)(ptr)) >> 4) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_IP_H */ diff --git a/lib/lwip/include/lwip/prot/ip4.h b/lib/lwip/include/lwip/prot/ip4.h new file mode 100644 index 0000000000..9347461154 --- /dev/null +++ b/lib/lwip/include/lwip/prot/ip4.h @@ -0,0 +1,131 @@ +/** + * @file + * IPv4 protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_IP4_H +#define LWIP_HDR_PROT_IP4_H + +#include "lwip/arch.h" +#include "lwip/ip4_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** This is the packed version of ip4_addr_t, + used in network headers that are itself packed */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip4_addr_packed { + PACK_STRUCT_FIELD(u32_t addr); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +typedef struct ip4_addr_packed ip4_addr_p_t; + +/* Size of the IPv4 header. Same as 'sizeof(struct ip_hdr)'. */ +#define IP_HLEN 20 +/* Maximum size of the IPv4 header with options. */ +#define IP_HLEN_MAX 60 + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/* The IPv4 header */ +struct ip_hdr { + /* version / header length */ + PACK_STRUCT_FLD_8(u8_t _v_hl); + /* type of service */ + PACK_STRUCT_FLD_8(u8_t _tos); + /* total length */ + PACK_STRUCT_FIELD(u16_t _len); + /* identification */ + PACK_STRUCT_FIELD(u16_t _id); + /* fragment offset field */ + PACK_STRUCT_FIELD(u16_t _offset); +#define IP_RF 0x8000U /* reserved fragment flag */ +#define IP_DF 0x4000U /* don't fragment flag */ +#define IP_MF 0x2000U /* more fragments flag */ +#define IP_OFFMASK 0x1fffU /* mask for fragmenting bits */ + /* time to live */ + PACK_STRUCT_FLD_8(u8_t _ttl); + /* protocol*/ + PACK_STRUCT_FLD_8(u8_t _proto); + /* checksum */ + PACK_STRUCT_FIELD(u16_t _chksum); + /* source and destination IP addresses */ + PACK_STRUCT_FLD_S(ip4_addr_p_t src); + PACK_STRUCT_FLD_S(ip4_addr_p_t dest); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/* Macros to get struct ip_hdr fields: */ +#define IPH_V(hdr) ((hdr)->_v_hl >> 4) +#define IPH_HL(hdr) ((hdr)->_v_hl & 0x0f) +#define IPH_HL_BYTES(hdr) ((u8_t)(IPH_HL(hdr) * 4)) +#define IPH_TOS(hdr) ((hdr)->_tos) +#define IPH_LEN(hdr) ((hdr)->_len) +#define IPH_ID(hdr) ((hdr)->_id) +#define IPH_OFFSET(hdr) ((hdr)->_offset) +#define IPH_OFFSET_BYTES(hdr) ((u16_t)((lwip_ntohs(IPH_OFFSET(hdr)) & IP_OFFMASK) * 8U)) +#define IPH_TTL(hdr) ((hdr)->_ttl) +#define IPH_PROTO(hdr) ((hdr)->_proto) +#define IPH_CHKSUM(hdr) ((hdr)->_chksum) + +/* Macros to set struct ip_hdr fields: */ +#define IPH_VHL_SET(hdr, v, hl) (hdr)->_v_hl = (u8_t)((((v) << 4) | (hl))) +#define IPH_TOS_SET(hdr, tos) (hdr)->_tos = (tos) +#define IPH_LEN_SET(hdr, len) (hdr)->_len = (len) +#define IPH_ID_SET(hdr, id) (hdr)->_id = (id) +#define IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off) +#define IPH_TTL_SET(hdr, ttl) (hdr)->_ttl = (u8_t)(ttl) +#define IPH_PROTO_SET(hdr, proto) (hdr)->_proto = (u8_t)(proto) +#define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum) + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_IP4_H */ diff --git a/lib/lwip/include/lwip/prot/ip6.h b/lib/lwip/include/lwip/prot/ip6.h new file mode 100644 index 0000000000..7df81edd69 --- /dev/null +++ b/lib/lwip/include/lwip/prot/ip6.h @@ -0,0 +1,235 @@ +/** + * @file + * IPv6 protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_IP6_H +#define LWIP_HDR_PROT_IP6_H + +#include "lwip/arch.h" +#include "lwip/ip6_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define IP6_MIN_MTU_LENGTH 1280 + +/** This is the packed version of ip6_addr_t, + used in network headers that are itself packed */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip6_addr_packed { + PACK_STRUCT_FIELD(u32_t addr[4]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +typedef struct ip6_addr_packed ip6_addr_p_t; + +#define IP6_HLEN 40 + +#define IP6_NEXTH_HOPBYHOP 0 +#define IP6_NEXTH_TCP 6 +#define IP6_NEXTH_UDP 17 +#define IP6_NEXTH_ENCAPS 41 +#define IP6_NEXTH_ROUTING 43 +#define IP6_NEXTH_FRAGMENT 44 +#define IP6_NEXTH_ICMP6 58 +#define IP6_NEXTH_NONE 59 +#define IP6_NEXTH_DESTOPTS 60 +#define IP6_NEXTH_UDPLITE 136 + +/** The IPv6 header. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip6_hdr { + /** version / traffic class / flow label */ + PACK_STRUCT_FIELD(u32_t _v_tc_fl); + /** payload length */ + PACK_STRUCT_FIELD(u16_t _plen); + /** next header */ + PACK_STRUCT_FLD_8(u8_t _nexth); + /** hop limit */ + PACK_STRUCT_FLD_8(u8_t _hoplim); + /** source and destination IP addresses */ + PACK_STRUCT_FLD_S(ip6_addr_p_t src); + PACK_STRUCT_FLD_S(ip6_addr_p_t dest); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define IP6H_V(hdr) ((lwip_ntohl((hdr)->_v_tc_fl) >> 28) & 0x0f) +#define IP6H_TC(hdr) ((lwip_ntohl((hdr)->_v_tc_fl) >> 20) & 0xff) +#define IP6H_FL(hdr) (lwip_ntohl((hdr)->_v_tc_fl) & 0x000fffff) +#define IP6H_PLEN(hdr) (lwip_ntohs((hdr)->_plen)) +#define IP6H_NEXTH(hdr) ((hdr)->_nexth) +#define IP6H_NEXTH_P(hdr) ((u8_t *)(hdr) + 6) +#define IP6H_HOPLIM(hdr) ((hdr)->_hoplim) +#define IP6H_VTCFL_SET(hdr, v, tc, fl) (hdr)->_v_tc_fl = (lwip_htonl((((u32_t)(v)) << 28) | (((u32_t)(tc)) << 20) | (fl))) +#define IP6H_PLEN_SET(hdr, plen) (hdr)->_plen = lwip_htons(plen) +#define IP6H_NEXTH_SET(hdr, nexth) (hdr)->_nexth = (nexth) +#define IP6H_HOPLIM_SET(hdr, hl) (hdr)->_hoplim = (u8_t)(hl) + +/* ipv6 extended options header */ +#define IP6_PAD1_OPTION 0 +#define IP6_PADN_OPTION 1 +#define IP6_ROUTER_ALERT_OPTION 5 +#define IP6_JUMBO_OPTION 194 +#define IP6_HOME_ADDRESS_OPTION 201 +#define IP6_ROUTER_ALERT_DLEN 2 +#define IP6_ROUTER_ALERT_VALUE_MLD 0 + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip6_opt_hdr { + /* router alert option type */ + PACK_STRUCT_FLD_8(u8_t _opt_type); + /* router alert option data len */ + PACK_STRUCT_FLD_8(u8_t _opt_dlen); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define IP6_OPT_HLEN 2 +#define IP6_OPT_TYPE_ACTION(hdr) ((((hdr)->_opt_type) >> 6) & 0x3) +#define IP6_OPT_TYPE_CHANGE(hdr) ((((hdr)->_opt_type) >> 5) & 0x1) +#define IP6_OPT_TYPE(hdr) ((hdr)->_opt_type) +#define IP6_OPT_DLEN(hdr) ((hdr)->_opt_dlen) + +/* Hop-by-Hop header. */ +#define IP6_HBH_HLEN 2 + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip6_hbh_hdr { + /* next header */ + PACK_STRUCT_FLD_8(u8_t _nexth); + /* header length in 8-octet units */ + PACK_STRUCT_FLD_8(u8_t _hlen); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define IP6_HBH_NEXTH(hdr) ((hdr)->_nexth) + +/* Destination header. */ +#define IP6_DEST_HLEN 2 + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip6_dest_hdr { + /* next header */ + PACK_STRUCT_FLD_8(u8_t _nexth); + /* header length in 8-octet units */ + PACK_STRUCT_FLD_8(u8_t _hlen); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define IP6_DEST_NEXTH(hdr) ((hdr)->_nexth) + +/* Routing header */ +#define IP6_ROUT_TYPE2 2 +#define IP6_ROUT_RPL 3 + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip6_rout_hdr { + /* next header */ + PACK_STRUCT_FLD_8(u8_t _nexth); + /* reserved */ + PACK_STRUCT_FLD_8(u8_t _hlen); + /* fragment offset */ + PACK_STRUCT_FIELD(u8_t _routing_type); + /* fragmented packet identification */ + PACK_STRUCT_FIELD(u8_t _segments_left); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define IP6_ROUT_NEXTH(hdr) ((hdr)->_nexth) +#define IP6_ROUT_TYPE(hdr) ((hdr)->_routing_type) +#define IP6_ROUT_SEG_LEFT(hdr) ((hdr)->_segments_left) + +/* Fragment header. */ +#define IP6_FRAG_HLEN 8 +#define IP6_FRAG_OFFSET_MASK 0xfff8 +#define IP6_FRAG_MORE_FLAG 0x0001 + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ip6_frag_hdr { + /* next header */ + PACK_STRUCT_FLD_8(u8_t _nexth); + /* reserved */ + PACK_STRUCT_FLD_8(u8_t reserved); + /* fragment offset */ + PACK_STRUCT_FIELD(u16_t _fragment_offset); + /* fragmented packet identification */ + PACK_STRUCT_FIELD(u32_t _identification); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define IP6_FRAG_NEXTH(hdr) ((hdr)->_nexth) +#define IP6_FRAG_MBIT(hdr) (lwip_ntohs((hdr)->_fragment_offset) & 0x1) +#define IP6_FRAG_ID(hdr) (lwip_ntohl((hdr)->_identification)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_IP6_H */ diff --git a/lib/lwip/include/lwip/prot/mld6.h b/lib/lwip/include/lwip/prot/mld6.h new file mode 100644 index 0000000000..71f1dcbdc5 --- /dev/null +++ b/lib/lwip/include/lwip/prot/mld6.h @@ -0,0 +1,71 @@ +/** + * @file + * MLD6 protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_MLD6_H +#define LWIP_HDR_PROT_MLD6_H + +#include "lwip/arch.h" +#include "lwip/prot/ip6.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define MLD6_HBH_HLEN 8 +/** Multicast listener report/query/done message header. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct mld_header { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u16_t max_resp_delay); + PACK_STRUCT_FIELD(u16_t reserved); + PACK_STRUCT_FLD_S(ip6_addr_p_t multicast_address); + /* Options follow. */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_MLD6_H */ diff --git a/lib/lwip/include/lwip/prot/nd6.h b/lib/lwip/include/lwip/prot/nd6.h new file mode 100644 index 0000000000..c270d07c13 --- /dev/null +++ b/lib/lwip/include/lwip/prot/nd6.h @@ -0,0 +1,274 @@ +/** + * @file + * ND6 protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_ND6_H +#define LWIP_HDR_PROT_ND6_H + +#include "lwip/arch.h" +#include "lwip/ip6_addr.h" +#include "lwip/prot/ip6.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** Neighbor solicitation message header. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ns_header { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u32_t reserved); + PACK_STRUCT_FLD_S(ip6_addr_p_t target_address); + /* Options follow. */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Neighbor advertisement message header. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct na_header { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FLD_8(u8_t flags); + PACK_STRUCT_FLD_8(u8_t reserved[3]); + PACK_STRUCT_FLD_S(ip6_addr_p_t target_address); + /* Options follow. */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif +#define ND6_FLAG_ROUTER (0x80) +#define ND6_FLAG_SOLICITED (0x40) +#define ND6_FLAG_OVERRIDE (0x20) + +/** Router solicitation message header. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct rs_header { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u32_t reserved); + /* Options follow. */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Router advertisement message header. */ +#define ND6_RA_FLAG_MANAGED_ADDR_CONFIG (0x80) +#define ND6_RA_FLAG_OTHER_CONFIG (0x40) +#define ND6_RA_FLAG_HOME_AGENT (0x20) +#define ND6_RA_PREFERENCE_MASK (0x18) +#define ND6_RA_PREFERENCE_HIGH (0x08) +#define ND6_RA_PREFERENCE_MEDIUM (0x00) +#define ND6_RA_PREFERENCE_LOW (0x18) +#define ND6_RA_PREFERENCE_DISABLED (0x10) +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct ra_header { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FLD_8(u8_t current_hop_limit); + PACK_STRUCT_FLD_8(u8_t flags); + PACK_STRUCT_FIELD(u16_t router_lifetime); + PACK_STRUCT_FIELD(u32_t reachable_time); + PACK_STRUCT_FIELD(u32_t retrans_timer); + /* Options follow. */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Redirect message header. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct redirect_header { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u32_t reserved); + PACK_STRUCT_FLD_S(ip6_addr_p_t target_address); + PACK_STRUCT_FLD_S(ip6_addr_p_t destination_address); + /* Options follow. */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Link-layer address option. */ +#define ND6_OPTION_TYPE_SOURCE_LLADDR (0x01) +#define ND6_OPTION_TYPE_TARGET_LLADDR (0x02) +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct lladdr_option { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t length); + PACK_STRUCT_FLD_8(u8_t addr[NETIF_MAX_HWADDR_LEN]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Prefix information option. */ +#define ND6_OPTION_TYPE_PREFIX_INFO (0x03) +#define ND6_PREFIX_FLAG_ON_LINK (0x80) +#define ND6_PREFIX_FLAG_AUTONOMOUS (0x40) +#define ND6_PREFIX_FLAG_ROUTER_ADDRESS (0x20) +#define ND6_PREFIX_FLAG_SITE_PREFIX (0x10) +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct prefix_option { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t length); + PACK_STRUCT_FLD_8(u8_t prefix_length); + PACK_STRUCT_FLD_8(u8_t flags); + PACK_STRUCT_FIELD(u32_t valid_lifetime); + PACK_STRUCT_FIELD(u32_t preferred_lifetime); + PACK_STRUCT_FLD_8(u8_t reserved2[3]); + PACK_STRUCT_FLD_8(u8_t site_prefix_length); + PACK_STRUCT_FLD_S(ip6_addr_p_t prefix); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Redirected header option. */ +#define ND6_OPTION_TYPE_REDIR_HDR (0x04) +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct redirected_header_option { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t length); + PACK_STRUCT_FLD_8(u8_t reserved[6]); + /* Portion of redirected packet follows. */ + /* PACK_STRUCT_FLD_8(u8_t redirected[8]); */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** MTU option. */ +#define ND6_OPTION_TYPE_MTU (0x05) +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct mtu_option { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t length); + PACK_STRUCT_FIELD(u16_t reserved); + PACK_STRUCT_FIELD(u32_t mtu); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Route information option. */ +#define ND6_OPTION_TYPE_ROUTE_INFO (24) +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct route_option { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t length); + PACK_STRUCT_FLD_8(u8_t prefix_length); + PACK_STRUCT_FLD_8(u8_t preference); + PACK_STRUCT_FIELD(u32_t route_lifetime); + PACK_STRUCT_FLD_S(ip6_addr_p_t prefix); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/** Recursive DNS Server Option. */ +#define ND6_OPTION_TYPE_RDNSS (25) +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct rdnss_option { + PACK_STRUCT_FLD_8(u8_t type); + PACK_STRUCT_FLD_8(u8_t length); + PACK_STRUCT_FIELD(u16_t reserved); + PACK_STRUCT_FIELD(u32_t lifetime); + PACK_STRUCT_FLD_S(ip6_addr_p_t rdnss_address[1]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#define SIZEOF_RDNSS_OPTION_BASE 8 /* size without addresses */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_ND6_H */ diff --git a/lib/lwip/include/lwip/prot/tcp.h b/lib/lwip/include/lwip/prot/tcp.h new file mode 100644 index 0000000000..c1d7de1faf --- /dev/null +++ b/lib/lwip/include/lwip/prot/tcp.h @@ -0,0 +1,100 @@ +/** + * @file + * TCP protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_TCP_H +#define LWIP_HDR_PROT_TCP_H + +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Length of the TCP header, excluding options. */ +#define TCP_HLEN 20 + +/* Fields are (of course) in network byte order. + * Some fields are converted to host byte order in tcp_input(). + */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct tcp_hdr { + PACK_STRUCT_FIELD(u16_t src); + PACK_STRUCT_FIELD(u16_t dest); + PACK_STRUCT_FIELD(u32_t seqno); + PACK_STRUCT_FIELD(u32_t ackno); + PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags); + PACK_STRUCT_FIELD(u16_t wnd); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u16_t urgp); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/* TCP header flags bits */ +#define TCP_FIN 0x01U +#define TCP_SYN 0x02U +#define TCP_RST 0x04U +#define TCP_PSH 0x08U +#define TCP_ACK 0x10U +#define TCP_URG 0x20U +#define TCP_ECE 0x40U +#define TCP_CWR 0x80U +/* Valid TCP header flags */ +#define TCP_FLAGS 0x3fU + +#define TCP_MAX_OPTION_BYTES 40 + +#define TCPH_HDRLEN(phdr) ((u16_t)(lwip_ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)) +#define TCPH_HDRLEN_BYTES(phdr) ((u8_t)(TCPH_HDRLEN(phdr) << 2)) +#define TCPH_FLAGS(phdr) ((u8_t)((lwip_ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS))) + +#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = lwip_htons(((len) << 12) | TCPH_FLAGS(phdr)) +#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & PP_HTONS(~TCP_FLAGS)) | lwip_htons(flags)) +#define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = (u16_t)(lwip_htons((u16_t)((len) << 12) | (flags))) + +#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | lwip_htons(flags)) +#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags & ~lwip_htons(flags)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_TCP_H */ diff --git a/lib/lwip/include/lwip/prot/udp.h b/lib/lwip/include/lwip/prot/udp.h new file mode 100644 index 0000000000..664f19a3e7 --- /dev/null +++ b/lib/lwip/include/lwip/prot/udp.h @@ -0,0 +1,68 @@ +/** + * @file + * UDP protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_PROT_UDP_H +#define LWIP_HDR_PROT_UDP_H + +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define UDP_HLEN 8 + +/* Fields are (of course) in network byte order. */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct udp_hdr { + PACK_STRUCT_FIELD(u16_t src); + PACK_STRUCT_FIELD(u16_t dest); /* src/dest UDP ports */ + PACK_STRUCT_FIELD(u16_t len); + PACK_STRUCT_FIELD(u16_t chksum); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_UDP_H */ diff --git a/lib/lwip/include/lwip/raw.h b/lib/lwip/include/lwip/raw.h new file mode 100644 index 0000000000..f916ff6b8e --- /dev/null +++ b/lib/lwip/include/lwip/raw.h @@ -0,0 +1,143 @@ +/** + * @file + * raw API (to be used from TCPIP thread)<br> + * See also @ref raw_raw + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_RAW_H +#define LWIP_HDR_RAW_H + +#include "lwip/opt.h" + +#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/pbuf.h" +#include "lwip/def.h" +#include "lwip/ip.h" +#include "lwip/ip_addr.h" +#include "lwip/ip6_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define RAW_FLAGS_CONNECTED 0x01U +#define RAW_FLAGS_HDRINCL 0x02U +#define RAW_FLAGS_MULTICAST_LOOP 0x04U + +struct raw_pcb; + +/** Function prototype for raw pcb receive callback functions. + * @param arg user supplied argument (raw_pcb.recv_arg) + * @param pcb the raw_pcb which received data + * @param p the packet buffer that was received + * @param addr the remote IP address from which the packet was received + * @return 1 if the packet was 'eaten' (aka. deleted), + * 0 if the packet lives on + * If returning 1, the callback is responsible for freeing the pbuf + * if it's not used any more. + */ +typedef u8_t (*raw_recv_fn)(void *arg, struct raw_pcb *pcb, struct pbuf *p, + const ip_addr_t *addr); + +/** the RAW protocol control block */ +struct raw_pcb { + /* Common members of all PCB types */ + IP_PCB; + + struct raw_pcb *next; + + u8_t protocol; + u8_t flags; + +#if LWIP_MULTICAST_TX_OPTIONS + /** outgoing network interface for multicast packets, by interface index (if nonzero) */ + u8_t mcast_ifindex; + /** TTL for outgoing multicast packets */ + u8_t mcast_ttl; +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + + /** receive callback function */ + raw_recv_fn recv; + /* user-supplied argument for the recv callback */ + void *recv_arg; +#if LWIP_IPV6 + /* fields for handling checksum computations as per RFC3542. */ + u16_t chksum_offset; + u8_t chksum_reqd; +#endif +}; + +/* The following functions is the application layer interface to the + RAW code. */ +struct raw_pcb * raw_new (u8_t proto); +struct raw_pcb * raw_new_ip_type(u8_t type, u8_t proto); +void raw_remove (struct raw_pcb *pcb); +err_t raw_bind (struct raw_pcb *pcb, const ip_addr_t *ipaddr); +void raw_bind_netif (struct raw_pcb *pcb, const struct netif *netif); +err_t raw_connect (struct raw_pcb *pcb, const ip_addr_t *ipaddr); +void raw_disconnect (struct raw_pcb *pcb); + +err_t raw_sendto (struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *ipaddr); +err_t raw_sendto_if_src(struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *dst_ip, struct netif *netif, const ip_addr_t *src_ip); +err_t raw_send (struct raw_pcb *pcb, struct pbuf *p); + +void raw_recv (struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg); + +#define raw_flags(pcb) ((pcb)->flags) +#define raw_setflags(pcb,f) ((pcb)->flags = (f)) + +#define raw_set_flags(pcb, set_flags) do { (pcb)->flags = (u8_t)((pcb)->flags | (set_flags)); } while(0) +#define raw_clear_flags(pcb, clr_flags) do { (pcb)->flags = (u8_t)((pcb)->flags & (u8_t)(~(clr_flags) & 0xff)); } while(0) +#define raw_is_flag_set(pcb, flag) (((pcb)->flags & (flag)) != 0) + +#define raw_init() /* Compatibility define, no init needed. */ + +/* for compatibility with older implementation */ +#define raw_new_ip6(proto) raw_new_ip_type(IPADDR_TYPE_V6, proto) + +#if LWIP_MULTICAST_TX_OPTIONS +#define raw_set_multicast_netif_index(pcb, idx) ((pcb)->mcast_ifindex = (idx)) +#define raw_get_multicast_netif_index(pcb) ((pcb)->mcast_ifindex) +#define raw_set_multicast_ttl(pcb, value) ((pcb)->mcast_ttl = (value)) +#define raw_get_multicast_ttl(pcb) ((pcb)->mcast_ttl) +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_RAW */ + +#endif /* LWIP_HDR_RAW_H */ diff --git a/lib/lwip/include/lwip/sio.h b/lib/lwip/include/lwip/sio.h new file mode 100644 index 0000000000..12d2a7e9b4 --- /dev/null +++ b/lib/lwip/include/lwip/sio.h @@ -0,0 +1,142 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + */ + +/* + * This is the interface to the platform specific serial IO module + * It needs to be implemented by those platforms which need SLIP or PPP + */ + +#ifndef SIO_H +#define SIO_H + +#include "lwip/arch.h" +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* If you want to define sio_fd_t elsewhere or differently, + define this in your cc.h file. */ +#ifndef __sio_fd_t_defined +typedef void * sio_fd_t; +#endif + +/* The following functions can be defined to something else in your cc.h file + or be implemented in your custom sio.c file. */ + +#ifndef sio_open +/** + * Opens a serial device for communication. + * + * @param devnum device number + * @return handle to serial device if successful, NULL otherwise + */ +sio_fd_t sio_open(u8_t devnum); +#endif + +#ifndef sio_send +/** + * Sends a single character to the serial device. + * + * @param c character to send + * @param fd serial device handle + * + * @note This function will block until the character can be sent. + */ +void sio_send(u8_t c, sio_fd_t fd); +#endif + +#ifndef sio_recv +/** + * Receives a single character from the serial device. + * + * @param fd serial device handle + * + * @note This function will block until a character is received. + */ +u8_t sio_recv(sio_fd_t fd); +#endif + +#ifndef sio_read +/** + * Reads from the serial device. + * + * @param fd serial device handle + * @param data pointer to data buffer for receiving + * @param len maximum length (in bytes) of data to receive + * @return number of bytes actually received - may be 0 if aborted by sio_read_abort + * + * @note This function will block until data can be received. The blocking + * can be cancelled by calling sio_read_abort(). + */ +u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len); +#endif + +#ifndef sio_tryread +/** + * Tries to read from the serial device. Same as sio_read but returns + * immediately if no data is available and never blocks. + * + * @param fd serial device handle + * @param data pointer to data buffer for receiving + * @param len maximum length (in bytes) of data to receive + * @return number of bytes actually received + */ +u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len); +#endif + +#ifndef sio_write +/** + * Writes to the serial device. + * + * @param fd serial device handle + * @param data pointer to data to send + * @param len length (in bytes) of data to send + * @return number of bytes actually sent + * + * @note This function will block until all data can be sent. + */ +u32_t sio_write(sio_fd_t fd, const u8_t *data, u32_t len); +#endif + +#ifndef sio_read_abort +/** + * Aborts a blocking sio_read() call. + * + * @param fd serial device handle + */ +void sio_read_abort(sio_fd_t fd); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* SIO_H */ diff --git a/lib/lwip/include/lwip/snmp.h b/lib/lwip/include/lwip/snmp.h new file mode 100644 index 0000000000..8704d0b4d2 --- /dev/null +++ b/lib/lwip/include/lwip/snmp.h @@ -0,0 +1,213 @@ +/** + * @file + * SNMP support API for implementing netifs and statitics for MIB2 + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Dirk Ziegelmeier dziegel@gmx.de + * + */ +#ifndef LWIP_HDR_SNMP_H +#define LWIP_HDR_SNMP_H + +#include "lwip/opt.h" +#include "lwip/ip_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct udp_pcb; +struct netif; + +/** + * @defgroup netif_mib2 MIB2 statistics + * @ingroup netif + */ + +/* MIB2 statistics functions */ +#if MIB2_STATS /* don't build if not configured for use in lwipopts.h */ +/** + * @ingroup netif_mib2 + * @see RFC1213, "MIB-II, 6. Definitions" + */ +enum snmp_ifType { + snmp_ifType_other=1, /* none of the following */ + snmp_ifType_regular1822, + snmp_ifType_hdh1822, + snmp_ifType_ddn_x25, + snmp_ifType_rfc877_x25, + snmp_ifType_ethernet_csmacd, + snmp_ifType_iso88023_csmacd, + snmp_ifType_iso88024_tokenBus, + snmp_ifType_iso88025_tokenRing, + snmp_ifType_iso88026_man, + snmp_ifType_starLan, + snmp_ifType_proteon_10Mbit, + snmp_ifType_proteon_80Mbit, + snmp_ifType_hyperchannel, + snmp_ifType_fddi, + snmp_ifType_lapb, + snmp_ifType_sdlc, + snmp_ifType_ds1, /* T-1 */ + snmp_ifType_e1, /* european equiv. of T-1 */ + snmp_ifType_basicISDN, + snmp_ifType_primaryISDN, /* proprietary serial */ + snmp_ifType_propPointToPointSerial, + snmp_ifType_ppp, + snmp_ifType_softwareLoopback, + snmp_ifType_eon, /* CLNP over IP [11] */ + snmp_ifType_ethernet_3Mbit, + snmp_ifType_nsip, /* XNS over IP */ + snmp_ifType_slip, /* generic SLIP */ + snmp_ifType_ultra, /* ULTRA technologies */ + snmp_ifType_ds3, /* T-3 */ + snmp_ifType_sip, /* SMDS */ + snmp_ifType_frame_relay +}; + +/** This macro has a precision of ~49 days because sys_now returns u32_t. #define your own if you want ~490 days. */ +#ifndef MIB2_COPY_SYSUPTIME_TO +#define MIB2_COPY_SYSUPTIME_TO(ptrToVal) (*(ptrToVal) = (sys_now() / 10)) +#endif + +/** + * @ingroup netif_mib2 + * Increment stats member for SNMP MIB2 stats (struct stats_mib2_netif_ctrs) + */ +#define MIB2_STATS_NETIF_INC(n, x) do { ++(n)->mib2_counters.x; } while(0) +/** + * @ingroup netif_mib2 + * Add value to stats member for SNMP MIB2 stats (struct stats_mib2_netif_ctrs) + */ +#define MIB2_STATS_NETIF_ADD(n, x, val) do { (n)->mib2_counters.x += (val); } while(0) + +/** + * @ingroup netif_mib2 + * Init MIB2 statistic counters in netif + * @param netif Netif to init + * @param type one of enum @ref snmp_ifType + * @param speed your link speed here (units: bits per second) + */ +#define MIB2_INIT_NETIF(netif, type, speed) do { \ + (netif)->link_type = (type); \ + (netif)->link_speed = (speed);\ + (netif)->ts = 0; \ + (netif)->mib2_counters.ifinoctets = 0; \ + (netif)->mib2_counters.ifinucastpkts = 0; \ + (netif)->mib2_counters.ifinnucastpkts = 0; \ + (netif)->mib2_counters.ifindiscards = 0; \ + (netif)->mib2_counters.ifinerrors = 0; \ + (netif)->mib2_counters.ifinunknownprotos = 0; \ + (netif)->mib2_counters.ifoutoctets = 0; \ + (netif)->mib2_counters.ifoutucastpkts = 0; \ + (netif)->mib2_counters.ifoutnucastpkts = 0; \ + (netif)->mib2_counters.ifoutdiscards = 0; \ + (netif)->mib2_counters.ifouterrors = 0; } while(0) +#else /* MIB2_STATS */ +#ifndef MIB2_COPY_SYSUPTIME_TO +#define MIB2_COPY_SYSUPTIME_TO(ptrToVal) +#endif +#define MIB2_INIT_NETIF(netif, type, speed) +#define MIB2_STATS_NETIF_INC(n, x) +#define MIB2_STATS_NETIF_ADD(n, x, val) +#endif /* MIB2_STATS */ + +/* LWIP MIB2 callbacks */ +#if LWIP_MIB2_CALLBACKS /* don't build if not configured for use in lwipopts.h */ +/* network interface */ +void mib2_netif_added(struct netif *ni); +void mib2_netif_removed(struct netif *ni); + +#if LWIP_IPV4 && LWIP_ARP +/* ARP (for atTable and ipNetToMediaTable) */ +void mib2_add_arp_entry(struct netif *ni, ip4_addr_t *ip); +void mib2_remove_arp_entry(struct netif *ni, ip4_addr_t *ip); +#else /* LWIP_IPV4 && LWIP_ARP */ +#define mib2_add_arp_entry(ni,ip) +#define mib2_remove_arp_entry(ni,ip) +#endif /* LWIP_IPV4 && LWIP_ARP */ + +/* IP */ +#if LWIP_IPV4 +void mib2_add_ip4(struct netif *ni); +void mib2_remove_ip4(struct netif *ni); +void mib2_add_route_ip4(u8_t dflt, struct netif *ni); +void mib2_remove_route_ip4(u8_t dflt, struct netif *ni); +#endif /* LWIP_IPV4 */ + +/* UDP */ +#if LWIP_UDP +void mib2_udp_bind(struct udp_pcb *pcb); +void mib2_udp_unbind(struct udp_pcb *pcb); +#endif /* LWIP_UDP */ + +#else /* LWIP_MIB2_CALLBACKS */ +/* LWIP_MIB2_CALLBACKS support not available */ +/* define everything to be empty */ + +/* network interface */ +#define mib2_netif_added(ni) +#define mib2_netif_removed(ni) + +/* ARP */ +#define mib2_add_arp_entry(ni,ip) +#define mib2_remove_arp_entry(ni,ip) + +/* IP */ +#define mib2_add_ip4(ni) +#define mib2_remove_ip4(ni) +#define mib2_add_route_ip4(dflt, ni) +#define mib2_remove_route_ip4(dflt, ni) + +/* UDP */ +#define mib2_udp_bind(pcb) +#define mib2_udp_unbind(pcb) +#endif /* LWIP_MIB2_CALLBACKS */ + +/* for source-code compatibility reasons only, can be removed (not used internally) */ +#define NETIF_INIT_SNMP MIB2_INIT_NETIF +#define snmp_add_ifinoctets(ni,value) MIB2_STATS_NETIF_ADD(ni, ifinoctets, value) +#define snmp_inc_ifinucastpkts(ni) MIB2_STATS_NETIF_INC(ni, ifinucastpkts) +#define snmp_inc_ifinnucastpkts(ni) MIB2_STATS_NETIF_INC(ni, ifinnucastpkts) +#define snmp_inc_ifindiscards(ni) MIB2_STATS_NETIF_INC(ni, ifindiscards) +#define snmp_inc_ifinerrors(ni) MIB2_STATS_NETIF_INC(ni, ifinerrors) +#define snmp_inc_ifinunknownprotos(ni) MIB2_STATS_NETIF_INC(ni, ifinunknownprotos) +#define snmp_add_ifoutoctets(ni,value) MIB2_STATS_NETIF_ADD(ni, ifoutoctets, value) +#define snmp_inc_ifoutucastpkts(ni) MIB2_STATS_NETIF_INC(ni, ifoutucastpkts) +#define snmp_inc_ifoutnucastpkts(ni) MIB2_STATS_NETIF_INC(ni, ifoutnucastpkts) +#define snmp_inc_ifoutdiscards(ni) MIB2_STATS_NETIF_INC(ni, ifoutdiscards) +#define snmp_inc_ifouterrors(ni) MIB2_STATS_NETIF_INC(ni, ifouterrors) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_SNMP_H */ diff --git a/lib/lwip/include/lwip/sockets.h b/lib/lwip/include/lwip/sockets.h new file mode 100644 index 0000000000..b6f3d524f1 --- /dev/null +++ b/lib/lwip/include/lwip/sockets.h @@ -0,0 +1,707 @@ +/** + * @file + * Socket API (to be used from non-TCPIP threads) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + + +#ifndef LWIP_HDR_SOCKETS_H +#define LWIP_HDR_SOCKETS_H + +#include "lwip/opt.h" + +#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ + +#if LWIP_SOCKET_EXTERNAL_HEADERS +#include LWIP_SOCKET_EXTERNAL_HEADER_SOCKETS_H +#else /* LWIP_SOCKET_EXTERNAL_HEADERS */ + +#include "lwip/ip_addr.h" +#include "lwip/netif.h" +#include "lwip/err.h" +#include "lwip/inet.h" +#include "lwip/errno.h" + +#include <string.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* sockaddr and pals include length fields */ +#define LWIP_SOCKET_HAVE_SA_LEN 1 + +/* If your port already typedef's sa_family_t, define SA_FAMILY_T_DEFINED + to prevent this code from redefining it. */ +#if !defined(sa_family_t) && !defined(SA_FAMILY_T_DEFINED) +typedef u8_t sa_family_t; +#endif +/* If your port already typedef's in_port_t, define IN_PORT_T_DEFINED + to prevent this code from redefining it. */ +#if !defined(in_port_t) && !defined(IN_PORT_T_DEFINED) +typedef u16_t in_port_t; +#endif + +#if LWIP_IPV4 +/* members are in network byte order */ +struct sockaddr_in { + u8_t sin_len; + sa_family_t sin_family; + in_port_t sin_port; + struct in_addr sin_addr; +#define SIN_ZERO_LEN 8 + char sin_zero[SIN_ZERO_LEN]; +}; +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +struct sockaddr_in6 { + u8_t sin6_len; /* length of this structure */ + sa_family_t sin6_family; /* AF_INET6 */ + in_port_t sin6_port; /* Transport layer port # */ + u32_t sin6_flowinfo; /* IPv6 flow information */ + struct in6_addr sin6_addr; /* IPv6 address */ + u32_t sin6_scope_id; /* Set of interfaces for scope */ +}; +#endif /* LWIP_IPV6 */ + +struct sockaddr { + u8_t sa_len; + sa_family_t sa_family; + char sa_data[14]; +}; + +struct sockaddr_storage { + u8_t s2_len; + sa_family_t ss_family; + char s2_data1[2]; + u32_t s2_data2[3]; +#if LWIP_IPV6 + u32_t s2_data3[3]; +#endif /* LWIP_IPV6 */ +}; + +/* If your port already typedef's socklen_t, define SOCKLEN_T_DEFINED + to prevent this code from redefining it. */ +#if !defined(socklen_t) && !defined(SOCKLEN_T_DEFINED) +typedef u32_t socklen_t; +#endif + +#if !defined IOV_MAX +#define IOV_MAX 0xFFFF +#elif IOV_MAX > 0xFFFF +#error "IOV_MAX larger than supported by LwIP" +#endif /* IOV_MAX */ + +#if !defined(iovec) +struct iovec { + void *iov_base; + size_t iov_len; +}; +#endif + +typedef int msg_iovlen_t; + +struct msghdr { + void *msg_name; + socklen_t msg_namelen; + struct iovec *msg_iov; + msg_iovlen_t msg_iovlen; + void *msg_control; + socklen_t msg_controllen; + int msg_flags; +}; + +/* struct msghdr->msg_flags bit field values */ +#define MSG_TRUNC 0x04 +#define MSG_CTRUNC 0x08 + +/* RFC 3542, Section 20: Ancillary Data */ +struct cmsghdr { + socklen_t cmsg_len; /* number of bytes, including header */ + int cmsg_level; /* originating protocol */ + int cmsg_type; /* protocol-specific type */ +}; +/* Data section follows header and possible padding, typically referred to as + unsigned char cmsg_data[]; */ + +/* cmsg header/data alignment. NOTE: we align to native word size (double word +size on 16-bit arch) so structures are not placed at an unaligned address. +16-bit arch needs double word to ensure 32-bit alignment because socklen_t +could be 32 bits. If we ever have cmsg data with a 64-bit variable, alignment +will need to increase long long */ +#define ALIGN_H(size) (((size) + sizeof(long) - 1U) & ~(sizeof(long)-1U)) +#define ALIGN_D(size) ALIGN_H(size) + +#define CMSG_FIRSTHDR(mhdr) \ + ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \ + (struct cmsghdr *)(mhdr)->msg_control : \ + (struct cmsghdr *)NULL) + +#define CMSG_NXTHDR(mhdr, cmsg) \ + (((cmsg) == NULL) ? CMSG_FIRSTHDR(mhdr) : \ + (((u8_t *)(cmsg) + ALIGN_H((cmsg)->cmsg_len) \ + + ALIGN_D(sizeof(struct cmsghdr)) > \ + (u8_t *)((mhdr)->msg_control) + (mhdr)->msg_controllen) ? \ + (struct cmsghdr *)NULL : \ + (struct cmsghdr *)((void*)((u8_t *)(cmsg) + \ + ALIGN_H((cmsg)->cmsg_len))))) + +#define CMSG_DATA(cmsg) ((void*)((u8_t *)(cmsg) + \ + ALIGN_D(sizeof(struct cmsghdr)))) + +#define CMSG_SPACE(length) (ALIGN_D(sizeof(struct cmsghdr)) + \ + ALIGN_H(length)) + +#define CMSG_LEN(length) (ALIGN_D(sizeof(struct cmsghdr)) + \ + length) + +/* Set socket options argument */ +#define IFNAMSIZ NETIF_NAMESIZE +struct ifreq { + char ifr_name[IFNAMSIZ]; /* Interface name */ +}; + +/* Socket protocol types (TCP/UDP/RAW) */ +#define SOCK_STREAM 1 +#define SOCK_DGRAM 2 +#define SOCK_RAW 3 + +/* + * Option flags per-socket. These must match the SOF_ flags in ip.h (checked in init.c) + */ +#define SO_REUSEADDR 0x0004 /* Allow local address reuse */ +#define SO_KEEPALIVE 0x0008 /* keep connections alive */ +#define SO_BROADCAST 0x0020 /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */ + + +/* + * Additional options, not kept in so_options. + */ +#define SO_DEBUG 0x0001 /* Unimplemented: turn on debugging info recording */ +#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ +#define SO_DONTROUTE 0x0010 /* Unimplemented: just use interface addresses */ +#define SO_USELOOPBACK 0x0040 /* Unimplemented: bypass hardware when possible */ +#define SO_LINGER 0x0080 /* linger on close if data present */ +#define SO_DONTLINGER ((int)(~SO_LINGER)) +#define SO_OOBINLINE 0x0100 /* Unimplemented: leave received OOB data in line */ +#define SO_REUSEPORT 0x0200 /* Unimplemented: allow local address & port reuse */ +#define SO_SNDBUF 0x1001 /* Unimplemented: send buffer size */ +#define SO_RCVBUF 0x1002 /* receive buffer size */ +#define SO_SNDLOWAT 0x1003 /* Unimplemented: send low-water mark */ +#define SO_RCVLOWAT 0x1004 /* Unimplemented: receive low-water mark */ +#define SO_SNDTIMEO 0x1005 /* send timeout */ +#define SO_RCVTIMEO 0x1006 /* receive timeout */ +#define SO_ERROR 0x1007 /* get error status and clear */ +#define SO_TYPE 0x1008 /* get socket type */ +#define SO_CONTIMEO 0x1009 /* Unimplemented: connect timeout */ +#define SO_NO_CHECK 0x100a /* don't create UDP checksum */ +#define SO_BINDTODEVICE 0x100b /* bind to device */ + +/* + * Structure used for manipulating linger option. + */ +struct linger { + int l_onoff; /* option on/off */ + int l_linger; /* linger time in seconds */ +}; + +/* + * Level number for (get/set)sockopt() to apply to socket itself. + */ +#define SOL_SOCKET 0xfff /* options for socket level */ + + +#define AF_UNSPEC 0 +#define AF_INET 2 +#if LWIP_IPV6 +#define AF_INET6 10 +#else /* LWIP_IPV6 */ +#define AF_INET6 AF_UNSPEC +#endif /* LWIP_IPV6 */ +#define PF_INET AF_INET +#define PF_INET6 AF_INET6 +#define PF_UNSPEC AF_UNSPEC + +#define IPPROTO_IP 0 +#define IPPROTO_ICMP 1 +#define IPPROTO_TCP 6 +#define IPPROTO_UDP 17 +#if LWIP_IPV6 +#define IPPROTO_IPV6 41 +#define IPPROTO_ICMPV6 58 +#endif /* LWIP_IPV6 */ +#define IPPROTO_UDPLITE 136 +#define IPPROTO_RAW 255 + +/* Flags we can use with send and recv. */ +#define MSG_PEEK 0x01 /* Peeks at an incoming message */ +#define MSG_WAITALL 0x02 /* Unimplemented: Requests that the function block until the full amount of data requested can be returned */ +#define MSG_OOB 0x04 /* Unimplemented: Requests out-of-band data. The significance and semantics of out-of-band data are protocol-specific */ +#define MSG_DONTWAIT 0x08 /* Nonblocking i/o for this operation only */ +#define MSG_MORE 0x10 /* Sender will send more */ +#define MSG_NOSIGNAL 0x20 /* Uninmplemented: Requests not to send the SIGPIPE signal if an attempt to send is made on a stream-oriented socket that is no longer connected. */ + + +/* + * Options for level IPPROTO_IP + */ +#define IP_TOS 1 +#define IP_TTL 2 +#define IP_PKTINFO 8 + +#if LWIP_TCP +/* + * Options for level IPPROTO_TCP + */ +#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ +#define TCP_KEEPALIVE 0x02 /* send KEEPALIVE probes when idle for pcb->keep_idle milliseconds */ +#define TCP_KEEPIDLE 0x03 /* set pcb->keep_idle - Same as TCP_KEEPALIVE, but use seconds for get/setsockopt */ +#define TCP_KEEPINTVL 0x04 /* set pcb->keep_intvl - Use seconds for get/setsockopt */ +#define TCP_KEEPCNT 0x05 /* set pcb->keep_cnt - Use number of probes sent for get/setsockopt */ +#endif /* LWIP_TCP */ + +#if LWIP_IPV6 +/* + * Options for level IPPROTO_IPV6 + */ +#define IPV6_CHECKSUM 7 /* RFC3542: calculate and insert the ICMPv6 checksum for raw sockets. */ +#define IPV6_V6ONLY 27 /* RFC3493: boolean control to restrict AF_INET6 sockets to IPv6 communications only. */ +#endif /* LWIP_IPV6 */ + +#if LWIP_UDP && LWIP_UDPLITE +/* + * Options for level IPPROTO_UDPLITE + */ +#define UDPLITE_SEND_CSCOV 0x01 /* sender checksum coverage */ +#define UDPLITE_RECV_CSCOV 0x02 /* minimal receiver checksum coverage */ +#endif /* LWIP_UDP && LWIP_UDPLITE*/ + + +#if LWIP_MULTICAST_TX_OPTIONS +/* + * Options and types for UDP multicast traffic handling + */ +#define IP_MULTICAST_TTL 5 +#define IP_MULTICAST_IF 6 +#define IP_MULTICAST_LOOP 7 +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + +#if LWIP_IGMP +/* + * Options and types related to multicast membership + */ +#define IP_ADD_MEMBERSHIP 3 +#define IP_DROP_MEMBERSHIP 4 + +typedef struct ip_mreq { + struct in_addr imr_multiaddr; /* IP multicast address of group */ + struct in_addr imr_interface; /* local IP address of interface */ +} ip_mreq; +#endif /* LWIP_IGMP */ + +#if LWIP_IPV4 +struct in_pktinfo { + unsigned int ipi_ifindex; /* Interface index */ + struct in_addr ipi_addr; /* Destination (from header) address */ +}; +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6_MLD +/* + * Options and types related to IPv6 multicast membership + */ +#define IPV6_JOIN_GROUP 12 +#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP +#define IPV6_LEAVE_GROUP 13 +#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP + +typedef struct ipv6_mreq { + struct in6_addr ipv6mr_multiaddr; /* IPv6 multicast addr */ + unsigned int ipv6mr_interface; /* interface index, or 0 */ +} ipv6_mreq; +#endif /* LWIP_IPV6_MLD */ + +/* + * The Type of Service provides an indication of the abstract + * parameters of the quality of service desired. These parameters are + * to be used to guide the selection of the actual service parameters + * when transmitting a datagram through a particular network. Several + * networks offer service precedence, which somehow treats high + * precedence traffic as more important than other traffic (generally + * by accepting only traffic above a certain precedence at time of high + * load). The major choice is a three way tradeoff between low-delay, + * high-reliability, and high-throughput. + * The use of the Delay, Throughput, and Reliability indications may + * increase the cost (in some sense) of the service. In many networks + * better performance for one of these parameters is coupled with worse + * performance on another. Except for very unusual cases at most two + * of these three indications should be set. + */ +#define IPTOS_TOS_MASK 0x1E +#define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK) +#define IPTOS_LOWDELAY 0x10 +#define IPTOS_THROUGHPUT 0x08 +#define IPTOS_RELIABILITY 0x04 +#define IPTOS_LOWCOST 0x02 +#define IPTOS_MINCOST IPTOS_LOWCOST + +/* + * The Network Control precedence designation is intended to be used + * within a network only. The actual use and control of that + * designation is up to each network. The Internetwork Control + * designation is intended for use by gateway control originators only. + * If the actual use of these precedence designations is of concern to + * a particular network, it is the responsibility of that network to + * control the access to, and use of, those precedence designations. + */ +#define IPTOS_PREC_MASK 0xe0 +#define IPTOS_PREC(tos) ((tos) & IPTOS_PREC_MASK) +#define IPTOS_PREC_NETCONTROL 0xe0 +#define IPTOS_PREC_INTERNETCONTROL 0xc0 +#define IPTOS_PREC_CRITIC_ECP 0xa0 +#define IPTOS_PREC_FLASHOVERRIDE 0x80 +#define IPTOS_PREC_FLASH 0x60 +#define IPTOS_PREC_IMMEDIATE 0x40 +#define IPTOS_PREC_PRIORITY 0x20 +#define IPTOS_PREC_ROUTINE 0x00 + + +/* + * Commands for ioctlsocket(), taken from the BSD file fcntl.h. + * lwip_ioctl only supports FIONREAD and FIONBIO, for now + * + * Ioctl's have the command encoded in the lower word, + * and the size of any in or out parameters in the upper + * word. The high 2 bits of the upper word are used + * to encode the in/out status of the parameter; for now + * we restrict parameters to at most 128 bytes. + */ +#if !defined(FIONREAD) || !defined(FIONBIO) +#define IOCPARM_MASK 0x7fUL /* parameters must be < 128 bytes */ +#define IOC_VOID 0x20000000UL /* no parameters */ +#define IOC_OUT 0x40000000UL /* copy out parameters */ +#define IOC_IN 0x80000000UL /* copy in parameters */ +#define IOC_INOUT (IOC_IN|IOC_OUT) + /* 0x20000000 distinguishes new & + old ioctl's */ +#define _IO(x,y) ((long)(IOC_VOID|((x)<<8)|(y))) + +#define _IOR(x,y,t) ((long)(IOC_OUT|((sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y))) + +#define _IOW(x,y,t) ((long)(IOC_IN|((sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y))) +#endif /* !defined(FIONREAD) || !defined(FIONBIO) */ + +#ifndef FIONREAD +#define FIONREAD _IOR('f', 127, unsigned long) /* get # bytes to read */ +#endif +#ifndef FIONBIO +#define FIONBIO _IOW('f', 126, unsigned long) /* set/clear non-blocking i/o */ +#endif + +/* Socket I/O Controls: unimplemented */ +#ifndef SIOCSHIWAT +#define SIOCSHIWAT _IOW('s', 0, unsigned long) /* set high watermark */ +#define SIOCGHIWAT _IOR('s', 1, unsigned long) /* get high watermark */ +#define SIOCSLOWAT _IOW('s', 2, unsigned long) /* set low watermark */ +#define SIOCGLOWAT _IOR('s', 3, unsigned long) /* get low watermark */ +#define SIOCATMARK _IOR('s', 7, unsigned long) /* at oob mark? */ +#endif + +/* commands for fnctl */ +#ifndef F_GETFL +#define F_GETFL 3 +#endif +#ifndef F_SETFL +#define F_SETFL 4 +#endif + +/* File status flags and file access modes for fnctl, + these are bits in an int. */ +#ifndef O_NONBLOCK +#define O_NONBLOCK 1 /* nonblocking I/O */ +#endif +#ifndef O_NDELAY +#define O_NDELAY O_NONBLOCK /* same as O_NONBLOCK, for compatibility */ +#endif +#ifndef O_RDONLY +#define O_RDONLY 2 +#endif +#ifndef O_WRONLY +#define O_WRONLY 4 +#endif +#ifndef O_RDWR +#define O_RDWR (O_RDONLY|O_WRONLY) +#endif + +#ifndef SHUT_RD + #define SHUT_RD 0 + #define SHUT_WR 1 + #define SHUT_RDWR 2 +#endif + +/* FD_SET used for lwip_select */ +#ifndef FD_SET +#undef FD_SETSIZE +/* Make FD_SETSIZE match NUM_SOCKETS in socket.c */ +#define FD_SETSIZE MEMP_NUM_NETCONN +#define LWIP_SELECT_MAXNFDS (FD_SETSIZE + LWIP_SOCKET_OFFSET) +#define FDSETSAFESET(n, code) do { \ + if (((n) - LWIP_SOCKET_OFFSET < MEMP_NUM_NETCONN) && (((int)(n) - LWIP_SOCKET_OFFSET) >= 0)) { \ + code; }} while(0) +#define FDSETSAFEGET(n, code) (((n) - LWIP_SOCKET_OFFSET < MEMP_NUM_NETCONN) && (((int)(n) - LWIP_SOCKET_OFFSET) >= 0) ?\ + (code) : 0) +#define FD_SET(n, p) FDSETSAFESET(n, (p)->fd_bits[((n)-LWIP_SOCKET_OFFSET)/8] = (u8_t)((p)->fd_bits[((n)-LWIP_SOCKET_OFFSET)/8] | (1 << (((n)-LWIP_SOCKET_OFFSET) & 7)))) +#define FD_CLR(n, p) FDSETSAFESET(n, (p)->fd_bits[((n)-LWIP_SOCKET_OFFSET)/8] = (u8_t)((p)->fd_bits[((n)-LWIP_SOCKET_OFFSET)/8] & ~(1 << (((n)-LWIP_SOCKET_OFFSET) & 7)))) +#define FD_ISSET(n,p) FDSETSAFEGET(n, (p)->fd_bits[((n)-LWIP_SOCKET_OFFSET)/8] & (1 << (((n)-LWIP_SOCKET_OFFSET) & 7))) +#define FD_ZERO(p) memset((void*)(p), 0, sizeof(*(p))) + +typedef struct fd_set +{ + unsigned char fd_bits [(FD_SETSIZE+7)/8]; +} fd_set; + +#elif FD_SETSIZE < (LWIP_SOCKET_OFFSET + MEMP_NUM_NETCONN) +#error "external FD_SETSIZE too small for number of sockets" +#else +#define LWIP_SELECT_MAXNFDS FD_SETSIZE +#endif /* FD_SET */ + +/* poll-related defines and types */ +/* @todo: find a better way to guard the definition of these defines and types if already defined */ +#if !defined(POLLIN) && !defined(POLLOUT) +#define POLLIN 0x1 +#define POLLOUT 0x2 +#define POLLERR 0x4 +#define POLLNVAL 0x8 +/* Below values are unimplemented */ +#define POLLRDNORM 0x10 +#define POLLRDBAND 0x20 +#define POLLPRI 0x40 +#define POLLWRNORM 0x80 +#define POLLWRBAND 0x100 +#define POLLHUP 0x200 +typedef unsigned int nfds_t; +struct pollfd +{ + int fd; + short events; + short revents; +}; +#endif + +/** LWIP_TIMEVAL_PRIVATE: if you want to use the struct timeval provided + * by your system, set this to 0 and include <sys/time.h> in cc.h */ +#ifndef LWIP_TIMEVAL_PRIVATE +#define LWIP_TIMEVAL_PRIVATE 1 +#endif + +#if LWIP_TIMEVAL_PRIVATE +struct timeval { + long tv_sec; /* seconds */ + long tv_usec; /* and microseconds */ +}; +#endif /* LWIP_TIMEVAL_PRIVATE */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SOCKET_EXTERNAL_HEADERS */ + +#ifdef __cplusplus +extern "C" { +#endif + +#define lwip_socket_init() /* Compatibility define, no init needed. */ +void lwip_socket_thread_init(void); /* LWIP_NETCONN_SEM_PER_THREAD==1: initialize thread-local semaphore */ +void lwip_socket_thread_cleanup(void); /* LWIP_NETCONN_SEM_PER_THREAD==1: destroy thread-local semaphore */ + +#if LWIP_COMPAT_SOCKETS == 2 +/* This helps code parsers/code completion by not having the COMPAT functions as defines */ +#define lwip_accept accept +#define lwip_bind bind +#define lwip_shutdown shutdown +#define lwip_getpeername getpeername +#define lwip_getsockname getsockname +#define lwip_setsockopt setsockopt +#define lwip_getsockopt getsockopt +#define lwip_close closesocket +#define lwip_connect connect +#define lwip_listen listen +#define lwip_recv recv +#define lwip_recvmsg recvmsg +#define lwip_recvfrom recvfrom +#define lwip_send send +#define lwip_sendmsg sendmsg +#define lwip_sendto sendto +#define lwip_socket socket +#if LWIP_SOCKET_SELECT +#define lwip_select select +#endif +#if LWIP_SOCKET_POLL +#define lwip_poll poll +#endif +#define lwip_ioctl ioctlsocket +#define lwip_inet_ntop inet_ntop +#define lwip_inet_pton inet_pton + +#if LWIP_POSIX_SOCKETS_IO_NAMES +#define lwip_read read +#define lwip_readv readv +#define lwip_write write +#define lwip_writev writev +#undef lwip_close +#define lwip_close close +#define closesocket(s) close(s) +int fcntl(int s, int cmd, ...); +#undef lwip_ioctl +#define lwip_ioctl ioctl +#define ioctlsocket ioctl +#endif /* LWIP_POSIX_SOCKETS_IO_NAMES */ +#endif /* LWIP_COMPAT_SOCKETS == 2 */ + +int lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen); +int lwip_bind(int s, const struct sockaddr *name, socklen_t namelen); +int lwip_shutdown(int s, int how); +int lwip_getpeername (int s, struct sockaddr *name, socklen_t *namelen); +int lwip_getsockname (int s, struct sockaddr *name, socklen_t *namelen); +int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *optlen); +int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_t optlen); + int lwip_close(int s); +int lwip_connect(int s, const struct sockaddr *name, socklen_t namelen); +int lwip_listen(int s, int backlog); +ssize_t lwip_recv(int s, void *mem, size_t len, int flags); +ssize_t lwip_read(int s, void *mem, size_t len); +ssize_t lwip_readv(int s, const struct iovec *iov, int iovcnt); +ssize_t lwip_recvfrom(int s, void *mem, size_t len, int flags, + struct sockaddr *from, socklen_t *fromlen); +ssize_t lwip_recvmsg(int s, struct msghdr *message, int flags); +ssize_t lwip_send(int s, const void *dataptr, size_t size, int flags); +ssize_t lwip_sendmsg(int s, const struct msghdr *message, int flags); +ssize_t lwip_sendto(int s, const void *dataptr, size_t size, int flags, + const struct sockaddr *to, socklen_t tolen); +int lwip_socket(int domain, int type, int protocol); +ssize_t lwip_write(int s, const void *dataptr, size_t size); +ssize_t lwip_writev(int s, const struct iovec *iov, int iovcnt); +#if LWIP_SOCKET_SELECT +int lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, + struct timeval *timeout); +#endif +#if LWIP_SOCKET_POLL +int lwip_poll(struct pollfd *fds, nfds_t nfds, int timeout); +#endif +int lwip_ioctl(int s, long cmd, void *argp); +int lwip_fcntl(int s, int cmd, int val); +const char *lwip_inet_ntop(int af, const void *src, char *dst, socklen_t size); +int lwip_inet_pton(int af, const char *src, void *dst); + +#if LWIP_COMPAT_SOCKETS +#if LWIP_COMPAT_SOCKETS != 2 +/** @ingroup socket */ +#define accept(s,addr,addrlen) lwip_accept(s,addr,addrlen) +/** @ingroup socket */ +#define bind(s,name,namelen) lwip_bind(s,name,namelen) +/** @ingroup socket */ +#define shutdown(s,how) lwip_shutdown(s,how) +/** @ingroup socket */ +#define getpeername(s,name,namelen) lwip_getpeername(s,name,namelen) +/** @ingroup socket */ +#define getsockname(s,name,namelen) lwip_getsockname(s,name,namelen) +/** @ingroup socket */ +#define setsockopt(s,level,optname,opval,optlen) lwip_setsockopt(s,level,optname,opval,optlen) +/** @ingroup socket */ +#define getsockopt(s,level,optname,opval,optlen) lwip_getsockopt(s,level,optname,opval,optlen) +/** @ingroup socket */ +#define closesocket(s) lwip_close(s) +/** @ingroup socket */ +#define connect(s,name,namelen) lwip_connect(s,name,namelen) +/** @ingroup socket */ +#define listen(s,backlog) lwip_listen(s,backlog) +/** @ingroup socket */ +#define recv(s,mem,len,flags) lwip_recv(s,mem,len,flags) +/** @ingroup socket */ +#define recvmsg(s,message,flags) lwip_recvmsg(s,message,flags) +/** @ingroup socket */ +#define recvfrom(s,mem,len,flags,from,fromlen) lwip_recvfrom(s,mem,len,flags,from,fromlen) +/** @ingroup socket */ +#define send(s,dataptr,size,flags) lwip_send(s,dataptr,size,flags) +/** @ingroup socket */ +#define sendmsg(s,message,flags) lwip_sendmsg(s,message,flags) +/** @ingroup socket */ +#define sendto(s,dataptr,size,flags,to,tolen) lwip_sendto(s,dataptr,size,flags,to,tolen) +/** @ingroup socket */ +#define socket(domain,type,protocol) lwip_socket(domain,type,protocol) +#if LWIP_SOCKET_SELECT +/** @ingroup socket */ +#define select(maxfdp1,readset,writeset,exceptset,timeout) lwip_select(maxfdp1,readset,writeset,exceptset,timeout) +#endif +#if LWIP_SOCKET_POLL +/** @ingroup socket */ +#define poll(fds,nfds,timeout) lwip_poll(fds,nfds,timeout) +#endif +/** @ingroup socket */ +#define ioctlsocket(s,cmd,argp) lwip_ioctl(s,cmd,argp) +/** @ingroup socket */ +#define inet_ntop(af,src,dst,size) lwip_inet_ntop(af,src,dst,size) +/** @ingroup socket */ +#define inet_pton(af,src,dst) lwip_inet_pton(af,src,dst) + +#if LWIP_POSIX_SOCKETS_IO_NAMES +/** @ingroup socket */ +#define read(s,mem,len) lwip_read(s,mem,len) +/** @ingroup socket */ +#define readv(s,iov,iovcnt) lwip_readv(s,iov,iovcnt) +/** @ingroup socket */ +#define write(s,dataptr,len) lwip_write(s,dataptr,len) +/** @ingroup socket */ +#define writev(s,iov,iovcnt) lwip_writev(s,iov,iovcnt) +/** @ingroup socket */ +#define close(s) lwip_close(s) +/** @ingroup socket */ +#define fcntl(s,cmd,val) lwip_fcntl(s,cmd,val) +/** @ingroup socket */ +#define ioctl(s,cmd,argp) lwip_ioctl(s,cmd,argp) +#endif /* LWIP_POSIX_SOCKETS_IO_NAMES */ +#endif /* LWIP_COMPAT_SOCKETS != 2 */ + +#endif /* LWIP_COMPAT_SOCKETS */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SOCKET */ + +#endif /* LWIP_HDR_SOCKETS_H */ diff --git a/lib/lwip/include/lwip/stats.h b/lib/lwip/include/lwip/stats.h new file mode 100644 index 0000000000..b570dbacf5 --- /dev/null +++ b/lib/lwip/include/lwip/stats.h @@ -0,0 +1,491 @@ +/** + * @file + * Statistics API (to be used from TCPIP thread) + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_STATS_H +#define LWIP_HDR_STATS_H + +#include "lwip/opt.h" + +#include "lwip/mem.h" +#include "lwip/memp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_STATS + +#ifndef LWIP_STATS_LARGE +#define LWIP_STATS_LARGE 0 +#endif + +#if LWIP_STATS_LARGE +#define STAT_COUNTER u32_t +#define STAT_COUNTER_F U32_F +#else +#define STAT_COUNTER u16_t +#define STAT_COUNTER_F U16_F +#endif + +/** Protocol related stats */ +struct stats_proto { + STAT_COUNTER xmit; /* Transmitted packets. */ + STAT_COUNTER recv; /* Received packets. */ + STAT_COUNTER fw; /* Forwarded packets. */ + STAT_COUNTER drop; /* Dropped packets. */ + STAT_COUNTER chkerr; /* Checksum error. */ + STAT_COUNTER lenerr; /* Invalid length error. */ + STAT_COUNTER memerr; /* Out of memory error. */ + STAT_COUNTER rterr; /* Routing error. */ + STAT_COUNTER proterr; /* Protocol error. */ + STAT_COUNTER opterr; /* Error in options. */ + STAT_COUNTER err; /* Misc error. */ + STAT_COUNTER cachehit; +}; + +/** IGMP stats */ +struct stats_igmp { + STAT_COUNTER xmit; /* Transmitted packets. */ + STAT_COUNTER recv; /* Received packets. */ + STAT_COUNTER drop; /* Dropped packets. */ + STAT_COUNTER chkerr; /* Checksum error. */ + STAT_COUNTER lenerr; /* Invalid length error. */ + STAT_COUNTER memerr; /* Out of memory error. */ + STAT_COUNTER proterr; /* Protocol error. */ + STAT_COUNTER rx_v1; /* Received v1 frames. */ + STAT_COUNTER rx_group; /* Received group-specific queries. */ + STAT_COUNTER rx_general; /* Received general queries. */ + STAT_COUNTER rx_report; /* Received reports. */ + STAT_COUNTER tx_join; /* Sent joins. */ + STAT_COUNTER tx_leave; /* Sent leaves. */ + STAT_COUNTER tx_report; /* Sent reports. */ +}; + +/** Memory stats */ +struct stats_mem { +#if defined(LWIP_DEBUG) || LWIP_STATS_DISPLAY + const char *name; +#endif /* defined(LWIP_DEBUG) || LWIP_STATS_DISPLAY */ + STAT_COUNTER err; + mem_size_t avail; + mem_size_t used; + mem_size_t max; + STAT_COUNTER illegal; +}; + +/** System element stats */ +struct stats_syselem { + STAT_COUNTER used; + STAT_COUNTER max; + STAT_COUNTER err; +}; + +/** System stats */ +struct stats_sys { + struct stats_syselem sem; + struct stats_syselem mutex; + struct stats_syselem mbox; +}; + +/** SNMP MIB2 stats */ +struct stats_mib2 { + /* IP */ + u32_t ipinhdrerrors; + u32_t ipinaddrerrors; + u32_t ipinunknownprotos; + u32_t ipindiscards; + u32_t ipindelivers; + u32_t ipoutrequests; + u32_t ipoutdiscards; + u32_t ipoutnoroutes; + u32_t ipreasmoks; + u32_t ipreasmfails; + u32_t ipfragoks; + u32_t ipfragfails; + u32_t ipfragcreates; + u32_t ipreasmreqds; + u32_t ipforwdatagrams; + u32_t ipinreceives; + + /* TCP */ + u32_t tcpactiveopens; + u32_t tcppassiveopens; + u32_t tcpattemptfails; + u32_t tcpestabresets; + u32_t tcpoutsegs; + u32_t tcpretranssegs; + u32_t tcpinsegs; + u32_t tcpinerrs; + u32_t tcpoutrsts; + + /* UDP */ + u32_t udpindatagrams; + u32_t udpnoports; + u32_t udpinerrors; + u32_t udpoutdatagrams; + + /* ICMP */ + u32_t icmpinmsgs; + u32_t icmpinerrors; + u32_t icmpindestunreachs; + u32_t icmpintimeexcds; + u32_t icmpinparmprobs; + u32_t icmpinsrcquenchs; + u32_t icmpinredirects; + u32_t icmpinechos; + u32_t icmpinechoreps; + u32_t icmpintimestamps; + u32_t icmpintimestampreps; + u32_t icmpinaddrmasks; + u32_t icmpinaddrmaskreps; + u32_t icmpoutmsgs; + u32_t icmpouterrors; + u32_t icmpoutdestunreachs; + u32_t icmpouttimeexcds; + u32_t icmpoutechos; /* can be incremented by user application ('ping') */ + u32_t icmpoutechoreps; +}; + +/** + * @ingroup netif_mib2 + * SNMP MIB2 interface stats + */ +struct stats_mib2_netif_ctrs { + /** The total number of octets received on the interface, including framing characters */ + u32_t ifinoctets; + /** The number of packets, delivered by this sub-layer to a higher (sub-)layer, which were + * not addressed to a multicast or broadcast address at this sub-layer */ + u32_t ifinucastpkts; + /** The number of packets, delivered by this sub-layer to a higher (sub-)layer, which were + * addressed to a multicast or broadcast address at this sub-layer */ + u32_t ifinnucastpkts; + /** The number of inbound packets which were chosen to be discarded even though no errors had + * been detected to prevent their being deliverable to a higher-layer protocol. One possible + * reason for discarding such a packet could be to free up buffer space */ + u32_t ifindiscards; + /** For packet-oriented interfaces, the number of inbound packets that contained errors + * preventing them from being deliverable to a higher-layer protocol. For character- + * oriented or fixed-length interfaces, the number of inbound transmission units that + * contained errors preventing them from being deliverable to a higher-layer protocol. */ + u32_t ifinerrors; + /** For packet-oriented interfaces, the number of packets received via the interface which + * were discarded because of an unknown or unsupported protocol. For character-oriented + * or fixed-length interfaces that support protocol multiplexing the number of transmission + * units received via the interface which were discarded because of an unknown or unsupported + * protocol. For any interface that does not support protocol multiplexing, this counter will + * always be 0 */ + u32_t ifinunknownprotos; + /** The total number of octets transmitted out of the interface, including framing characters. */ + u32_t ifoutoctets; + /** The total number of packets that higher-level protocols requested be transmitted, and + * which were not addressed to a multicast or broadcast address at this sub-layer, including + * those that were discarded or not sent. */ + u32_t ifoutucastpkts; + /** The total number of packets that higher-level protocols requested be transmitted, and which + * were addressed to a multicast or broadcast address at this sub-layer, including + * those that were discarded or not sent. */ + u32_t ifoutnucastpkts; + /** The number of outbound packets which were chosen to be discarded even though no errors had + * been detected to prevent their being transmitted. One possible reason for discarding + * such a packet could be to free up buffer space. */ + u32_t ifoutdiscards; + /** For packet-oriented interfaces, the number of outbound packets that could not be transmitted + * because of errors. For character-oriented or fixed-length interfaces, the number of outbound + * transmission units that could not be transmitted because of errors. */ + u32_t ifouterrors; +}; + +/** lwIP stats container */ +struct stats_ { +#if LINK_STATS + /** Link level */ + struct stats_proto link; +#endif +#if ETHARP_STATS + /** ARP */ + struct stats_proto etharp; +#endif +#if IPFRAG_STATS + /** Fragmentation */ + struct stats_proto ip_frag; +#endif +#if IP_STATS + /** IP */ + struct stats_proto ip; +#endif +#if ICMP_STATS + /** ICMP */ + struct stats_proto icmp; +#endif +#if IGMP_STATS + /** IGMP */ + struct stats_igmp igmp; +#endif +#if UDP_STATS + /** UDP */ + struct stats_proto udp; +#endif +#if TCP_STATS + /** TCP */ + struct stats_proto tcp; +#endif +#if MEM_STATS + /** Heap */ + struct stats_mem mem; +#endif +#if MEMP_STATS + /** Internal memory pools */ + struct stats_mem *memp[MEMP_MAX]; +#endif +#if SYS_STATS + /** System */ + struct stats_sys sys; +#endif +#if IP6_STATS + /** IPv6 */ + struct stats_proto ip6; +#endif +#if ICMP6_STATS + /** ICMP6 */ + struct stats_proto icmp6; +#endif +#if IP6_FRAG_STATS + /** IPv6 fragmentation */ + struct stats_proto ip6_frag; +#endif +#if MLD6_STATS + /** Multicast listener discovery */ + struct stats_igmp mld6; +#endif +#if ND6_STATS + /** Neighbor discovery */ + struct stats_proto nd6; +#endif +#if MIB2_STATS + /** SNMP MIB2 */ + struct stats_mib2 mib2; +#endif +}; + +/** Global variable containing lwIP internal statistics. Add this to your debugger's watchlist. */ +extern struct stats_ lwip_stats; + +/** Init statistics */ +void stats_init(void); + +#define STATS_INC(x) ++lwip_stats.x +#define STATS_DEC(x) --lwip_stats.x +#define STATS_INC_USED(x, y, type) do { lwip_stats.x.used = (type)(lwip_stats.x.used + y); \ + if (lwip_stats.x.max < lwip_stats.x.used) { \ + lwip_stats.x.max = lwip_stats.x.used; \ + } \ + } while(0) +#define STATS_GET(x) lwip_stats.x +#else /* LWIP_STATS */ +#define stats_init() +#define STATS_INC(x) +#define STATS_DEC(x) +#define STATS_INC_USED(x, y, type) +#endif /* LWIP_STATS */ + +#if TCP_STATS +#define TCP_STATS_INC(x) STATS_INC(x) +#define TCP_STATS_DISPLAY() stats_display_proto(&lwip_stats.tcp, "TCP") +#else +#define TCP_STATS_INC(x) +#define TCP_STATS_DISPLAY() +#endif + +#if UDP_STATS +#define UDP_STATS_INC(x) STATS_INC(x) +#define UDP_STATS_DISPLAY() stats_display_proto(&lwip_stats.udp, "UDP") +#else +#define UDP_STATS_INC(x) +#define UDP_STATS_DISPLAY() +#endif + +#if ICMP_STATS +#define ICMP_STATS_INC(x) STATS_INC(x) +#define ICMP_STATS_DISPLAY() stats_display_proto(&lwip_stats.icmp, "ICMP") +#else +#define ICMP_STATS_INC(x) +#define ICMP_STATS_DISPLAY() +#endif + +#if IGMP_STATS +#define IGMP_STATS_INC(x) STATS_INC(x) +#define IGMP_STATS_DISPLAY() stats_display_igmp(&lwip_stats.igmp, "IGMP") +#else +#define IGMP_STATS_INC(x) +#define IGMP_STATS_DISPLAY() +#endif + +#if IP_STATS +#define IP_STATS_INC(x) STATS_INC(x) +#define IP_STATS_DISPLAY() stats_display_proto(&lwip_stats.ip, "IP") +#else +#define IP_STATS_INC(x) +#define IP_STATS_DISPLAY() +#endif + +#if IPFRAG_STATS +#define IPFRAG_STATS_INC(x) STATS_INC(x) +#define IPFRAG_STATS_DISPLAY() stats_display_proto(&lwip_stats.ip_frag, "IP_FRAG") +#else +#define IPFRAG_STATS_INC(x) +#define IPFRAG_STATS_DISPLAY() +#endif + +#if ETHARP_STATS +#define ETHARP_STATS_INC(x) STATS_INC(x) +#define ETHARP_STATS_DISPLAY() stats_display_proto(&lwip_stats.etharp, "ETHARP") +#else +#define ETHARP_STATS_INC(x) +#define ETHARP_STATS_DISPLAY() +#endif + +#if LINK_STATS +#define LINK_STATS_INC(x) STATS_INC(x) +#define LINK_STATS_DISPLAY() stats_display_proto(&lwip_stats.link, "LINK") +#else +#define LINK_STATS_INC(x) +#define LINK_STATS_DISPLAY() +#endif + +#if MEM_STATS +#define MEM_STATS_AVAIL(x, y) lwip_stats.mem.x = y +#define MEM_STATS_INC(x) STATS_INC(mem.x) +#define MEM_STATS_INC_USED(x, y) STATS_INC_USED(mem, y, mem_size_t) +#define MEM_STATS_DEC_USED(x, y) lwip_stats.mem.x = (mem_size_t)((lwip_stats.mem.x) - (y)) +#define MEM_STATS_DISPLAY() stats_display_mem(&lwip_stats.mem, "HEAP") +#else +#define MEM_STATS_AVAIL(x, y) +#define MEM_STATS_INC(x) +#define MEM_STATS_INC_USED(x, y) +#define MEM_STATS_DEC_USED(x, y) +#define MEM_STATS_DISPLAY() +#endif + + #if MEMP_STATS +#define MEMP_STATS_DEC(x, i) STATS_DEC(memp[i]->x) +#define MEMP_STATS_DISPLAY(i) stats_display_memp(lwip_stats.memp[i], i) +#define MEMP_STATS_GET(x, i) STATS_GET(memp[i]->x) + #else +#define MEMP_STATS_DEC(x, i) +#define MEMP_STATS_DISPLAY(i) +#define MEMP_STATS_GET(x, i) 0 +#endif + +#if SYS_STATS +#define SYS_STATS_INC(x) STATS_INC(sys.x) +#define SYS_STATS_DEC(x) STATS_DEC(sys.x) +#define SYS_STATS_INC_USED(x) STATS_INC_USED(sys.x, 1, STAT_COUNTER) +#define SYS_STATS_DISPLAY() stats_display_sys(&lwip_stats.sys) +#else +#define SYS_STATS_INC(x) +#define SYS_STATS_DEC(x) +#define SYS_STATS_INC_USED(x) +#define SYS_STATS_DISPLAY() +#endif + +#if IP6_STATS +#define IP6_STATS_INC(x) STATS_INC(x) +#define IP6_STATS_DISPLAY() stats_display_proto(&lwip_stats.ip6, "IPv6") +#else +#define IP6_STATS_INC(x) +#define IP6_STATS_DISPLAY() +#endif + +#if ICMP6_STATS +#define ICMP6_STATS_INC(x) STATS_INC(x) +#define ICMP6_STATS_DISPLAY() stats_display_proto(&lwip_stats.icmp6, "ICMPv6") +#else +#define ICMP6_STATS_INC(x) +#define ICMP6_STATS_DISPLAY() +#endif + +#if IP6_FRAG_STATS +#define IP6_FRAG_STATS_INC(x) STATS_INC(x) +#define IP6_FRAG_STATS_DISPLAY() stats_display_proto(&lwip_stats.ip6_frag, "IPv6 FRAG") +#else +#define IP6_FRAG_STATS_INC(x) +#define IP6_FRAG_STATS_DISPLAY() +#endif + +#if MLD6_STATS +#define MLD6_STATS_INC(x) STATS_INC(x) +#define MLD6_STATS_DISPLAY() stats_display_igmp(&lwip_stats.mld6, "MLDv1") +#else +#define MLD6_STATS_INC(x) +#define MLD6_STATS_DISPLAY() +#endif + +#if ND6_STATS +#define ND6_STATS_INC(x) STATS_INC(x) +#define ND6_STATS_DISPLAY() stats_display_proto(&lwip_stats.nd6, "ND") +#else +#define ND6_STATS_INC(x) +#define ND6_STATS_DISPLAY() +#endif + +#if MIB2_STATS +#define MIB2_STATS_INC(x) STATS_INC(x) +#else +#define MIB2_STATS_INC(x) +#endif + +/* Display of statistics */ +#if LWIP_STATS_DISPLAY +void stats_display(void); +void stats_display_proto(struct stats_proto *proto, const char *name); +void stats_display_igmp(struct stats_igmp *igmp, const char *name); +void stats_display_mem(struct stats_mem *mem, const char *name); +void stats_display_memp(struct stats_mem *mem, int index); +void stats_display_sys(struct stats_sys *sys); +#else /* LWIP_STATS_DISPLAY */ +#define stats_display() +#define stats_display_proto(proto, name) +#define stats_display_igmp(igmp, name) +#define stats_display_mem(mem, name) +#define stats_display_memp(mem, index) +#define stats_display_sys(sys) +#endif /* LWIP_STATS_DISPLAY */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_STATS_H */ diff --git a/lib/lwip/include/lwip/sys.h b/lib/lwip/include/lwip/sys.h new file mode 100644 index 0000000000..4bfdb13dba --- /dev/null +++ b/lib/lwip/include/lwip/sys.h @@ -0,0 +1,575 @@ +/** + * @file + * OS abstraction layer + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + */ + +#ifndef LWIP_HDR_SYS_H +#define LWIP_HDR_SYS_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if NO_SYS + +/* For a totally minimal and standalone system, we provide null + definitions of the sys_ functions. */ +typedef u8_t sys_sem_t; +typedef u8_t sys_mutex_t; +typedef u8_t sys_mbox_t; + +#define sys_sem_new(s, c) ERR_OK +#define sys_sem_signal(s) +#define sys_sem_wait(s) +#define sys_arch_sem_wait(s,t) +#define sys_sem_free(s) +#define sys_sem_valid(s) 0 +#define sys_sem_valid_val(s) 0 +#define sys_sem_set_invalid(s) +#define sys_sem_set_invalid_val(s) +#define sys_mutex_new(mu) ERR_OK +#define sys_mutex_lock(mu) +#define sys_mutex_unlock(mu) +#define sys_mutex_free(mu) +#define sys_mutex_valid(mu) 0 +#define sys_mutex_set_invalid(mu) +#define sys_mbox_new(m, s) ERR_OK +#define sys_mbox_fetch(m,d) +#define sys_mbox_tryfetch(m,d) +#define sys_mbox_post(m,d) +#define sys_mbox_trypost(m,d) +#define sys_mbox_free(m) +#define sys_mbox_valid(m) +#define sys_mbox_valid_val(m) +#define sys_mbox_set_invalid(m) +#define sys_mbox_set_invalid_val(m) + +#define sys_thread_new(n,t,a,s,p) + +#define sys_msleep(t) + +#else /* NO_SYS */ + +/** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */ +#define SYS_ARCH_TIMEOUT 0xffffffffUL + +/** sys_mbox_tryfetch() returns SYS_MBOX_EMPTY if appropriate. + * For now we use the same magic value, but we allow this to change in future. + */ +#define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT + +#include "lwip/err.h" +#include "arch/sys_arch.h" + +/** Function prototype for thread functions */ +typedef void (*lwip_thread_fn)(void *arg); + +/* Function prototypes for functions to be implemented by platform ports + (in sys_arch.c) */ + +/* Mutex functions: */ + +/** Define LWIP_COMPAT_MUTEX if the port has no mutexes and binary semaphores + should be used instead */ +#ifndef LWIP_COMPAT_MUTEX +#define LWIP_COMPAT_MUTEX 0 +#endif + +#if LWIP_COMPAT_MUTEX +/* for old ports that don't have mutexes: define them to binary semaphores */ +#define sys_mutex_t sys_sem_t +#define sys_mutex_new(mutex) sys_sem_new(mutex, 1) +#define sys_mutex_lock(mutex) sys_sem_wait(mutex) +#define sys_mutex_unlock(mutex) sys_sem_signal(mutex) +#define sys_mutex_free(mutex) sys_sem_free(mutex) +#define sys_mutex_valid(mutex) sys_sem_valid(mutex) +#define sys_mutex_set_invalid(mutex) sys_sem_set_invalid(mutex) + +#else /* LWIP_COMPAT_MUTEX */ + +/** + * @ingroup sys_mutex + * Create a new mutex. + * Note that mutexes are expected to not be taken recursively by the lwIP code, + * so both implementation types (recursive or non-recursive) should work. + * The mutex is allocated to the memory that 'mutex' + * points to (which can be both a pointer or the actual OS structure). + * If the mutex has been created, ERR_OK should be returned. Returning any + * other error will provide a hint what went wrong, but except for assertions, + * no real error handling is implemented. + * + * @param mutex pointer to the mutex to create + * @return ERR_OK if successful, another err_t otherwise + */ +err_t sys_mutex_new(sys_mutex_t *mutex); +/** + * @ingroup sys_mutex + * Blocks the thread until the mutex can be grabbed. + * @param mutex the mutex to lock + */ +void sys_mutex_lock(sys_mutex_t *mutex); +/** + * @ingroup sys_mutex + * Releases the mutex previously locked through 'sys_mutex_lock()'. + * @param mutex the mutex to unlock + */ +void sys_mutex_unlock(sys_mutex_t *mutex); +/** + * @ingroup sys_mutex + * Deallocates a mutex. + * @param mutex the mutex to delete + */ +void sys_mutex_free(sys_mutex_t *mutex); +#ifndef sys_mutex_valid +/** + * @ingroup sys_mutex + * Returns 1 if the mutes is valid, 0 if it is not valid. + * When using pointers, a simple way is to check the pointer for != NULL. + * When directly using OS structures, implementing this may be more complex. + * This may also be a define, in which case the function is not prototyped. + */ +int sys_mutex_valid(sys_mutex_t *mutex); +#endif +#ifndef sys_mutex_set_invalid +/** + * @ingroup sys_mutex + * Invalidate a mutex so that sys_mutex_valid() returns 0. + * ATTENTION: This does NOT mean that the mutex shall be deallocated: + * sys_mutex_free() is always called before calling this function! + * This may also be a define, in which case the function is not prototyped. + */ +void sys_mutex_set_invalid(sys_mutex_t *mutex); +#endif +#endif /* LWIP_COMPAT_MUTEX */ + +/* Semaphore functions: */ + +/** + * @ingroup sys_sem + * Create a new semaphore + * Creates a new semaphore. The semaphore is allocated to the memory that 'sem' + * points to (which can be both a pointer or the actual OS structure). + * The "count" argument specifies the initial state of the semaphore (which is + * either 0 or 1). + * If the semaphore has been created, ERR_OK should be returned. Returning any + * other error will provide a hint what went wrong, but except for assertions, + * no real error handling is implemented. + * + * @param sem pointer to the semaphore to create + * @param count initial count of the semaphore + * @return ERR_OK if successful, another err_t otherwise + */ +err_t sys_sem_new(sys_sem_t *sem, u8_t count); +/** + * @ingroup sys_sem + * Signals a semaphore + * @param sem the semaphore to signal + */ +void sys_sem_signal(sys_sem_t *sem); +/** + * @ingroup sys_sem + * Blocks the thread while waiting for the semaphore to be signaled. If the + * "timeout" argument is non-zero, the thread should only be blocked for the + * specified time (measured in milliseconds). If the "timeout" argument is zero, + * the thread should be blocked until the semaphore is signalled. + * + * The return value is SYS_ARCH_TIMEOUT if the semaphore wasn't signaled within + * the specified time or any other value if it was signaled (with or without + * waiting). + * Notice that lwIP implements a function with a similar name, + * sys_sem_wait(), that uses the sys_arch_sem_wait() function. + * + * @param sem the semaphore to wait for + * @param timeout timeout in milliseconds to wait (0 = wait forever) + * @return SYS_ARCH_TIMEOUT on timeout, any other value on success + */ +u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout); +/** + * @ingroup sys_sem + * Deallocates a semaphore. + * @param sem semaphore to delete + */ +void sys_sem_free(sys_sem_t *sem); +/** Wait for a semaphore - forever/no timeout */ +#define sys_sem_wait(sem) sys_arch_sem_wait(sem, 0) +#ifndef sys_sem_valid +/** + * @ingroup sys_sem + * Returns 1 if the semaphore is valid, 0 if it is not valid. + * When using pointers, a simple way is to check the pointer for != NULL. + * When directly using OS structures, implementing this may be more complex. + * This may also be a define, in which case the function is not prototyped. + */ +int sys_sem_valid(sys_sem_t *sem); +#endif +#ifndef sys_sem_set_invalid +/** + * @ingroup sys_sem + * Invalidate a semaphore so that sys_sem_valid() returns 0. + * ATTENTION: This does NOT mean that the semaphore shall be deallocated: + * sys_sem_free() is always called before calling this function! + * This may also be a define, in which case the function is not prototyped. + */ +void sys_sem_set_invalid(sys_sem_t *sem); +#endif +#ifndef sys_sem_valid_val +/** + * Same as sys_sem_valid() but taking a value, not a pointer + */ +#define sys_sem_valid_val(sem) sys_sem_valid(&(sem)) +#endif +#ifndef sys_sem_set_invalid_val +/** + * Same as sys_sem_set_invalid() but taking a value, not a pointer + */ +#define sys_sem_set_invalid_val(sem) sys_sem_set_invalid(&(sem)) +#endif + +#ifndef sys_msleep +/** + * @ingroup sys_misc + * Sleep for specified number of ms + */ +void sys_msleep(u32_t ms); /* only has a (close to) 1 ms resolution. */ +#endif + +/* Mailbox functions. */ + +/** + * @ingroup sys_mbox + * Creates an empty mailbox for maximum "size" elements. Elements stored + * in mailboxes are pointers. You have to define macros "_MBOX_SIZE" + * in your lwipopts.h, or ignore this parameter in your implementation + * and use a default size. + * If the mailbox has been created, ERR_OK should be returned. Returning any + * other error will provide a hint what went wrong, but except for assertions, + * no real error handling is implemented. + * + * @param mbox pointer to the mbox to create + * @param size (minimum) number of messages in this mbox + * @return ERR_OK if successful, another err_t otherwise + */ +err_t sys_mbox_new(sys_mbox_t *mbox, int size); +/** + * @ingroup sys_mbox + * Post a message to an mbox - may not fail + * -> blocks if full, only to be used from tasks NOT from ISR! + * + * @param mbox mbox to posts the message + * @param msg message to post (ATTENTION: can be NULL) + */ +void sys_mbox_post(sys_mbox_t *mbox, void *msg); +/** + * @ingroup sys_mbox + * Try to post a message to an mbox - may fail if full. + * Can be used from ISR (if the sys arch layer allows this). + * Returns ERR_MEM if it is full, else, ERR_OK if the "msg" is posted. + * + * @param mbox mbox to posts the message + * @param msg message to post (ATTENTION: can be NULL) + */ +err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg); +/** + * @ingroup sys_mbox + * Try to post a message to an mbox - may fail if full. + * To be be used from ISR. + * Returns ERR_MEM if it is full, else, ERR_OK if the "msg" is posted. + * + * @param mbox mbox to posts the message + * @param msg message to post (ATTENTION: can be NULL) + */ +err_t sys_mbox_trypost_fromisr(sys_mbox_t *mbox, void *msg); +/** + * @ingroup sys_mbox + * Blocks the thread until a message arrives in the mailbox, but does + * not block the thread longer than "timeout" milliseconds (similar to + * the sys_arch_sem_wait() function). If "timeout" is 0, the thread should + * be blocked until a message arrives. The "msg" argument is a result + * parameter that is set by the function (i.e., by doing "*msg = + * ptr"). The "msg" parameter maybe NULL to indicate that the message + * should be dropped. + * The return values are the same as for the sys_arch_sem_wait() function: + * SYS_ARCH_TIMEOUT if there was a timeout, any other value if a messages + * is received. + * + * Note that a function with a similar name, sys_mbox_fetch(), is + * implemented by lwIP. + * + * @param mbox mbox to get a message from + * @param msg pointer where the message is stored + * @param timeout maximum time (in milliseconds) to wait for a message (0 = wait forever) + * @return SYS_ARCH_TIMEOUT on timeout, any other value if a message has been received + */ +u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout); +/* Allow port to override with a macro, e.g. special timeout for sys_arch_mbox_fetch() */ +#ifndef sys_arch_mbox_tryfetch +/** + * @ingroup sys_mbox + * This is similar to sys_arch_mbox_fetch, however if a message is not + * present in the mailbox, it immediately returns with the code + * SYS_MBOX_EMPTY. On success 0 is returned. + * To allow for efficient implementations, this can be defined as a + * function-like macro in sys_arch.h instead of a normal function. For + * example, a naive implementation could be: + * #define sys_arch_mbox_tryfetch(mbox,msg) sys_arch_mbox_fetch(mbox,msg,1) + * although this would introduce unnecessary delays. + * + * @param mbox mbox to get a message from + * @param msg pointer where the message is stored + * @return 0 (milliseconds) if a message has been received + * or SYS_MBOX_EMPTY if the mailbox is empty + */ +u32_t sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg); +#endif +/** + * For now, we map straight to sys_arch implementation. + */ +#define sys_mbox_tryfetch(mbox, msg) sys_arch_mbox_tryfetch(mbox, msg) +/** + * @ingroup sys_mbox + * Deallocates a mailbox. If there are messages still present in the + * mailbox when the mailbox is deallocated, it is an indication of a + * programming error in lwIP and the developer should be notified. + * + * @param mbox mbox to delete + */ +void sys_mbox_free(sys_mbox_t *mbox); +#define sys_mbox_fetch(mbox, msg) sys_arch_mbox_fetch(mbox, msg, 0) +#ifndef sys_mbox_valid +/** + * @ingroup sys_mbox + * Returns 1 if the mailbox is valid, 0 if it is not valid. + * When using pointers, a simple way is to check the pointer for != NULL. + * When directly using OS structures, implementing this may be more complex. + * This may also be a define, in which case the function is not prototyped. + */ +int sys_mbox_valid(sys_mbox_t *mbox); +#endif +#ifndef sys_mbox_set_invalid +/** + * @ingroup sys_mbox + * Invalidate a mailbox so that sys_mbox_valid() returns 0. + * ATTENTION: This does NOT mean that the mailbox shall be deallocated: + * sys_mbox_free() is always called before calling this function! + * This may also be a define, in which case the function is not prototyped. + */ +void sys_mbox_set_invalid(sys_mbox_t *mbox); +#endif +#ifndef sys_mbox_valid_val +/** + * Same as sys_mbox_valid() but taking a value, not a pointer + */ +#define sys_mbox_valid_val(mbox) sys_mbox_valid(&(mbox)) +#endif +#ifndef sys_mbox_set_invalid_val +/** + * Same as sys_mbox_set_invalid() but taking a value, not a pointer + */ +#define sys_mbox_set_invalid_val(mbox) sys_mbox_set_invalid(&(mbox)) +#endif + + +/** + * @ingroup sys_misc + * The only thread function: + * Starts a new thread named "name" with priority "prio" that will begin its + * execution in the function "thread()". The "arg" argument will be passed as an + * argument to the thread() function. The stack size to used for this thread is + * the "stacksize" parameter. The id of the new thread is returned. Both the id + * and the priority are system dependent. + * ATTENTION: although this function returns a value, it MUST NOT FAIL (ports have to assert this!) + * + * @param name human-readable name for the thread (used for debugging purposes) + * @param thread thread-function + * @param arg parameter passed to 'thread' + * @param stacksize stack size in bytes for the new thread (may be ignored by ports) + * @param prio priority of the new thread (may be ignored by ports) */ +sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stacksize, int prio); + +#endif /* NO_SYS */ + +/** + * @ingroup lwip_opts_lock + * Called as first thing in the lwIP TCPIP thread. Can be used in conjunction + * with @ref LWIP_ASSERT_CORE_LOCKED to check core locking. + * @see @ref multithreading + */ +#if !defined LWIP_MARK_TCPIP_THREAD || defined __DOXYGEN__ +#define LWIP_MARK_TCPIP_THREAD() +#endif + +/** + * @ingroup sys_misc + * sys_init() must be called before anything else. + * Initialize the sys_arch layer. + */ +void sys_init(void); + +#ifndef sys_jiffies +/** + * Ticks/jiffies since power up. + */ +u32_t sys_jiffies(void); +#endif + +#ifdef LWIP_FUZZ_SYS_NOW +/* This offset should be added to the time 'sys_now()' returns */ +extern u32_t sys_now_offset; +#endif + +/** + * @ingroup sys_time + * Returns the current time in milliseconds, + * may be the same as sys_jiffies or at least based on it. + * Don't care for wraparound, this is only used for time diffs. + * Not implementing this function means you cannot use some modules (e.g. TCP + * timestamps, internal timeouts for NO_SYS==1). + */ +u32_t sys_now(void); + +/* Critical Region Protection */ +/* These functions must be implemented in the sys_arch.c file. + In some implementations they can provide a more light-weight protection + mechanism than using semaphores. Otherwise semaphores can be used for + implementation */ +#ifndef SYS_ARCH_PROTECT +/** SYS_LIGHTWEIGHT_PROT + * define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection + * for certain critical regions during buffer allocation, deallocation and memory + * allocation and deallocation. + */ +#if SYS_LIGHTWEIGHT_PROT + +/** + * @ingroup sys_prot + * SYS_ARCH_DECL_PROTECT + * declare a protection variable. This macro will default to defining a variable of + * type sys_prot_t. If a particular port needs a different implementation, then + * this macro may be defined in sys_arch.h. + */ +#define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev +/** + * @ingroup sys_prot + * SYS_ARCH_PROTECT + * Perform a "fast" protect. This could be implemented by + * disabling interrupts for an embedded system or by using a semaphore or + * mutex. The implementation should allow calling SYS_ARCH_PROTECT when + * already protected. The old protection level is returned in the variable + * "lev". This macro will default to calling the sys_arch_protect() function + * which should be implemented in sys_arch.c. If a particular port needs a + * different implementation, then this macro may be defined in sys_arch.h + */ +#define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect() +/** + * @ingroup sys_prot + * SYS_ARCH_UNPROTECT + * Perform a "fast" set of the protection level to "lev". This could be + * implemented by setting the interrupt level to "lev" within the MACRO or by + * using a semaphore or mutex. This macro will default to calling the + * sys_arch_unprotect() function which should be implemented in + * sys_arch.c. If a particular port needs a different implementation, then + * this macro may be defined in sys_arch.h + */ +#define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev) +sys_prot_t sys_arch_protect(void); +void sys_arch_unprotect(sys_prot_t pval); + +#else + +#define SYS_ARCH_DECL_PROTECT(lev) +#define SYS_ARCH_PROTECT(lev) +#define SYS_ARCH_UNPROTECT(lev) + +#endif /* SYS_LIGHTWEIGHT_PROT */ + +#endif /* SYS_ARCH_PROTECT */ + +/* + * Macros to set/get and increase/decrease variables in a thread-safe way. + * Use these for accessing variable that are used from more than one thread. + */ + +#ifndef SYS_ARCH_INC +#define SYS_ARCH_INC(var, val) do { \ + SYS_ARCH_DECL_PROTECT(old_level); \ + SYS_ARCH_PROTECT(old_level); \ + var += val; \ + SYS_ARCH_UNPROTECT(old_level); \ + } while(0) +#endif /* SYS_ARCH_INC */ + +#ifndef SYS_ARCH_DEC +#define SYS_ARCH_DEC(var, val) do { \ + SYS_ARCH_DECL_PROTECT(old_level); \ + SYS_ARCH_PROTECT(old_level); \ + var -= val; \ + SYS_ARCH_UNPROTECT(old_level); \ + } while(0) +#endif /* SYS_ARCH_DEC */ + +#ifndef SYS_ARCH_GET +#define SYS_ARCH_GET(var, ret) do { \ + SYS_ARCH_DECL_PROTECT(old_level); \ + SYS_ARCH_PROTECT(old_level); \ + ret = var; \ + SYS_ARCH_UNPROTECT(old_level); \ + } while(0) +#endif /* SYS_ARCH_GET */ + +#ifndef SYS_ARCH_SET +#define SYS_ARCH_SET(var, val) do { \ + SYS_ARCH_DECL_PROTECT(old_level); \ + SYS_ARCH_PROTECT(old_level); \ + var = val; \ + SYS_ARCH_UNPROTECT(old_level); \ + } while(0) +#endif /* SYS_ARCH_SET */ + +#ifndef SYS_ARCH_LOCKED +#define SYS_ARCH_LOCKED(code) do { \ + SYS_ARCH_DECL_PROTECT(old_level); \ + SYS_ARCH_PROTECT(old_level); \ + code; \ + SYS_ARCH_UNPROTECT(old_level); \ + } while(0) +#endif /* SYS_ARCH_LOCKED */ + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_SYS_H */ diff --git a/lib/lwip/include/lwip/tcp.h b/lib/lwip/include/lwip/tcp.h new file mode 100644 index 0000000000..3991fd6e7b --- /dev/null +++ b/lib/lwip/include/lwip/tcp.h @@ -0,0 +1,500 @@ +/** + * @file + * TCP API (to be used from TCPIP thread)<br> + * See also @ref tcp_raw + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_TCP_H +#define LWIP_HDR_TCP_H + +#include "lwip/opt.h" + +#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/tcpbase.h" +#include "lwip/mem.h" +#include "lwip/pbuf.h" +#include "lwip/ip.h" +#include "lwip/icmp.h" +#include "lwip/err.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct tcp_pcb; +struct tcp_pcb_listen; + +/** Function prototype for tcp accept callback functions. Called when a new + * connection can be accepted on a listening pcb. + * + * @param arg Additional argument to pass to the callback function (@see tcp_arg()) + * @param newpcb The new connection pcb + * @param err An error code if there has been an error accepting. + * Only return ERR_ABRT if you have called tcp_abort from within the + * callback function! + */ +typedef err_t (*tcp_accept_fn)(void *arg, struct tcp_pcb *newpcb, err_t err); + +/** Function prototype for tcp receive callback functions. Called when data has + * been received. + * + * @param arg Additional argument to pass to the callback function (@see tcp_arg()) + * @param tpcb The connection pcb which received data + * @param p The received data (or NULL when the connection has been closed!) + * @param err An error code if there has been an error receiving + * Only return ERR_ABRT if you have called tcp_abort from within the + * callback function! + */ +typedef err_t (*tcp_recv_fn)(void *arg, struct tcp_pcb *tpcb, + struct pbuf *p, err_t err); + +/** Function prototype for tcp sent callback functions. Called when sent data has + * been acknowledged by the remote side. Use it to free corresponding resources. + * This also means that the pcb has now space available to send new data. + * + * @param arg Additional argument to pass to the callback function (@see tcp_arg()) + * @param tpcb The connection pcb for which data has been acknowledged + * @param len The amount of bytes acknowledged + * @return ERR_OK: try to send some data by calling tcp_output + * Only return ERR_ABRT if you have called tcp_abort from within the + * callback function! + */ +typedef err_t (*tcp_sent_fn)(void *arg, struct tcp_pcb *tpcb, + u16_t len); + +/** Function prototype for tcp poll callback functions. Called periodically as + * specified by @see tcp_poll. + * + * @param arg Additional argument to pass to the callback function (@see tcp_arg()) + * @param tpcb tcp pcb + * @return ERR_OK: try to send some data by calling tcp_output + * Only return ERR_ABRT if you have called tcp_abort from within the + * callback function! + */ +typedef err_t (*tcp_poll_fn)(void *arg, struct tcp_pcb *tpcb); + +/** Function prototype for tcp error callback functions. Called when the pcb + * receives a RST or is unexpectedly closed for any other reason. + * + * @note The corresponding pcb is already freed when this callback is called! + * + * @param arg Additional argument to pass to the callback function (@see tcp_arg()) + * @param err Error code to indicate why the pcb has been closed + * ERR_ABRT: aborted through tcp_abort or by a TCP timer + * ERR_RST: the connection was reset by the remote host + */ +typedef void (*tcp_err_fn)(void *arg, err_t err); + +/** Function prototype for tcp connected callback functions. Called when a pcb + * is connected to the remote side after initiating a connection attempt by + * calling tcp_connect(). + * + * @param arg Additional argument to pass to the callback function (@see tcp_arg()) + * @param tpcb The connection pcb which is connected + * @param err An unused error code, always ERR_OK currently ;-) @todo! + * Only return ERR_ABRT if you have called tcp_abort from within the + * callback function! + * + * @note When a connection attempt fails, the error callback is currently called! + */ +typedef err_t (*tcp_connected_fn)(void *arg, struct tcp_pcb *tpcb, err_t err); + +#if LWIP_WND_SCALE +#define RCV_WND_SCALE(pcb, wnd) (((wnd) >> (pcb)->rcv_scale)) +#define SND_WND_SCALE(pcb, wnd) (((wnd) << (pcb)->snd_scale)) +#define TCPWND16(x) ((u16_t)LWIP_MIN((x), 0xFFFF)) +#define TCP_WND_MAX(pcb) ((tcpwnd_size_t)(((pcb)->flags & TF_WND_SCALE) ? TCP_WND : TCPWND16(TCP_WND))) +#else +#define RCV_WND_SCALE(pcb, wnd) (wnd) +#define SND_WND_SCALE(pcb, wnd) (wnd) +#define TCPWND16(x) (x) +#define TCP_WND_MAX(pcb) TCP_WND +#endif +/* Increments a tcpwnd_size_t and holds at max value rather than rollover */ +#define TCP_WND_INC(wnd, inc) do { \ + if ((tcpwnd_size_t)(wnd + inc) >= wnd) { \ + wnd = (tcpwnd_size_t)(wnd + inc); \ + } else { \ + wnd = (tcpwnd_size_t)-1; \ + } \ + } while(0) + +#if LWIP_TCP_SACK_OUT +/** SACK ranges to include in ACK packets. + * SACK entry is invalid if left==right. */ +struct tcp_sack_range { + /** Left edge of the SACK: the first acknowledged sequence number. */ + u32_t left; + /** Right edge of the SACK: the last acknowledged sequence number +1 (so first NOT acknowledged). */ + u32_t right; +}; +#endif /* LWIP_TCP_SACK_OUT */ + +/** Function prototype for deallocation of arguments. Called *just before* the + * pcb is freed, so don't expect to be able to do anything with this pcb! + * + * @param id ext arg id (allocated via @ref tcp_ext_arg_alloc_id) + * @param data pointer to the data (set via @ref tcp_ext_arg_set before) + */ +typedef void (*tcp_extarg_callback_pcb_destroyed_fn)(u8_t id, void *data); + +/** Function prototype to transition arguments from a listening pcb to an accepted pcb + * + * @param id ext arg id (allocated via @ref tcp_ext_arg_alloc_id) + * @param lpcb the listening pcb accepting a connection + * @param cpcb the newly allocated connection pcb + * @return ERR_OK if OK, any error if connection should be dropped + */ +typedef err_t (*tcp_extarg_callback_passive_open_fn)(u8_t id, struct tcp_pcb_listen *lpcb, struct tcp_pcb *cpcb); + +/** A table of callback functions that is invoked for ext arguments */ +struct tcp_ext_arg_callbacks { + /** @ref tcp_extarg_callback_pcb_destroyed_fn */ + tcp_extarg_callback_pcb_destroyed_fn destroy; + /** @ref tcp_extarg_callback_passive_open_fn */ + tcp_extarg_callback_passive_open_fn passive_open; +}; + +#define LWIP_TCP_PCB_NUM_EXT_ARG_ID_INVALID 0xFF + +#if LWIP_TCP_PCB_NUM_EXT_ARGS +/* This is the structure for ext args in tcp pcbs (used as array) */ +struct tcp_pcb_ext_args { + const struct tcp_ext_arg_callbacks *callbacks; + void *data; +}; +/* This is a helper define to prevent zero size arrays if disabled */ +#define TCP_PCB_EXTARGS struct tcp_pcb_ext_args ext_args[LWIP_TCP_PCB_NUM_EXT_ARGS]; +#else +#define TCP_PCB_EXTARGS +#endif + +typedef u16_t tcpflags_t; +#define TCP_ALLFLAGS 0xffffU + +/** + * members common to struct tcp_pcb and struct tcp_listen_pcb + */ +#define TCP_PCB_COMMON(type) \ + type *next; /* for the linked list */ \ + void *callback_arg; \ + TCP_PCB_EXTARGS \ + enum tcp_state state; /* TCP state */ \ + u8_t prio; \ + /* ports are in host byte order */ \ + u16_t local_port + + +/** the TCP protocol control block for listening pcbs */ +struct tcp_pcb_listen { +/** Common members of all PCB types */ + IP_PCB; +/** Protocol specific PCB members */ + TCP_PCB_COMMON(struct tcp_pcb_listen); + +#if LWIP_CALLBACK_API + /* Function to call when a listener has been connected. */ + tcp_accept_fn accept; +#endif /* LWIP_CALLBACK_API */ + +#if TCP_LISTEN_BACKLOG + u8_t backlog; + u8_t accepts_pending; +#endif /* TCP_LISTEN_BACKLOG */ +}; + + +/** the TCP protocol control block */ +struct tcp_pcb { +/** common PCB members */ + IP_PCB; +/** protocol specific PCB members */ + TCP_PCB_COMMON(struct tcp_pcb); + + /* ports are in host byte order */ + u16_t remote_port; + + tcpflags_t flags; +#define TF_ACK_DELAY 0x01U /* Delayed ACK. */ +#define TF_ACK_NOW 0x02U /* Immediate ACK. */ +#define TF_INFR 0x04U /* In fast recovery. */ +#define TF_CLOSEPEND 0x08U /* If this is set, tcp_close failed to enqueue the FIN (retried in tcp_tmr) */ +#define TF_RXCLOSED 0x10U /* rx closed by tcp_shutdown */ +#define TF_FIN 0x20U /* Connection was closed locally (FIN segment enqueued). */ +#define TF_NODELAY 0x40U /* Disable Nagle algorithm */ +#define TF_NAGLEMEMERR 0x80U /* nagle enabled, memerr, try to output to prevent delayed ACK to happen */ +#if LWIP_WND_SCALE +#define TF_WND_SCALE 0x0100U /* Window Scale option enabled */ +#endif +#if TCP_LISTEN_BACKLOG +#define TF_BACKLOGPEND 0x0200U /* If this is set, a connection pcb has increased the backlog on its listener */ +#endif +#if LWIP_TCP_TIMESTAMPS +#define TF_TIMESTAMP 0x0400U /* Timestamp option enabled */ +#endif +#define TF_RTO 0x0800U /* RTO timer has fired, in-flight data moved to unsent and being retransmitted */ +#if LWIP_TCP_SACK_OUT +#define TF_SACK 0x1000U /* Selective ACKs enabled */ +#endif + + /* the rest of the fields are in host byte order + as we have to do some math with them */ + + /* Timers */ + u8_t polltmr, pollinterval; + u8_t last_timer; + u32_t tmr; + + /* receiver variables */ + u32_t rcv_nxt; /* next seqno expected */ + tcpwnd_size_t rcv_wnd; /* receiver window available */ + tcpwnd_size_t rcv_ann_wnd; /* receiver window to announce */ + u32_t rcv_ann_right_edge; /* announced right edge of window */ + +#if LWIP_TCP_SACK_OUT + /* SACK ranges to include in ACK packets (entry is invalid if left==right) */ + struct tcp_sack_range rcv_sacks[LWIP_TCP_MAX_SACK_NUM]; +#define LWIP_TCP_SACK_VALID(pcb, idx) ((pcb)->rcv_sacks[idx].left != (pcb)->rcv_sacks[idx].right) +#endif /* LWIP_TCP_SACK_OUT */ + + /* Retransmission timer. */ + s16_t rtime; + + u16_t mss; /* maximum segment size */ + + /* RTT (round trip time) estimation variables */ + u32_t rttest; /* RTT estimate in 500ms ticks */ + u32_t rtseq; /* sequence number being timed */ + s16_t sa, sv; /* @see "Congestion Avoidance and Control" by Van Jacobson and Karels */ + + s16_t rto; /* retransmission time-out (in ticks of TCP_SLOW_INTERVAL) */ + u8_t nrtx; /* number of retransmissions */ + + /* fast retransmit/recovery */ + u8_t dupacks; + u32_t lastack; /* Highest acknowledged seqno. */ + + /* congestion avoidance/control variables */ + tcpwnd_size_t cwnd; + tcpwnd_size_t ssthresh; + + /* first byte following last rto byte */ + u32_t rto_end; + + /* sender variables */ + u32_t snd_nxt; /* next new seqno to be sent */ + u32_t snd_wl1, snd_wl2; /* Sequence and acknowledgement numbers of last + window update. */ + u32_t snd_lbb; /* Sequence number of next byte to be buffered. */ + tcpwnd_size_t snd_wnd; /* sender window */ + tcpwnd_size_t snd_wnd_max; /* the maximum sender window announced by the remote host */ + + tcpwnd_size_t snd_buf; /* Available buffer space for sending (in bytes). */ +#define TCP_SNDQUEUELEN_OVERFLOW (0xffffU-3) + u16_t snd_queuelen; /* Number of pbufs currently in the send buffer. */ + +#if TCP_OVERSIZE + /* Extra bytes available at the end of the last pbuf in unsent. */ + u16_t unsent_oversize; +#endif /* TCP_OVERSIZE */ + + tcpwnd_size_t bytes_acked; + + /* These are ordered by sequence number: */ + struct tcp_seg *unsent; /* Unsent (queued) segments. */ + struct tcp_seg *unacked; /* Sent but unacknowledged segments. */ +#if TCP_QUEUE_OOSEQ + struct tcp_seg *ooseq; /* Received out of sequence segments. */ +#endif /* TCP_QUEUE_OOSEQ */ + + struct pbuf *refused_data; /* Data previously received but not yet taken by upper layer */ + +#if LWIP_CALLBACK_API || TCP_LISTEN_BACKLOG + struct tcp_pcb_listen* listener; +#endif /* LWIP_CALLBACK_API || TCP_LISTEN_BACKLOG */ + +#if LWIP_CALLBACK_API + /* Function to be called when more send buffer space is available. */ + tcp_sent_fn sent; + /* Function to be called when (in-sequence) data has arrived. */ + tcp_recv_fn recv; + /* Function to be called when a connection has been set up. */ + tcp_connected_fn connected; + /* Function which is called periodically. */ + tcp_poll_fn poll; + /* Function to be called whenever a fatal error occurs. */ + tcp_err_fn errf; +#endif /* LWIP_CALLBACK_API */ + +#if LWIP_TCP_TIMESTAMPS + u32_t ts_lastacksent; + u32_t ts_recent; +#endif /* LWIP_TCP_TIMESTAMPS */ + + /* idle time before KEEPALIVE is sent */ + u32_t keep_idle; +#if LWIP_TCP_KEEPALIVE + u32_t keep_intvl; + u32_t keep_cnt; +#endif /* LWIP_TCP_KEEPALIVE */ + + /* Persist timer counter */ + u8_t persist_cnt; + /* Persist timer back-off */ + u8_t persist_backoff; + /* Number of persist probes */ + u8_t persist_probe; + + /* KEEPALIVE counter */ + u8_t keep_cnt_sent; + +#if LWIP_WND_SCALE + u8_t snd_scale; + u8_t rcv_scale; +#endif +}; + +#if LWIP_EVENT_API + +enum lwip_event { + LWIP_EVENT_ACCEPT, + LWIP_EVENT_SENT, + LWIP_EVENT_RECV, + LWIP_EVENT_CONNECTED, + LWIP_EVENT_POLL, + LWIP_EVENT_ERR +}; + +err_t lwip_tcp_event(void *arg, struct tcp_pcb *pcb, + enum lwip_event, + struct pbuf *p, + u16_t size, + err_t err); + +#endif /* LWIP_EVENT_API */ + +/* Application program's interface: */ +struct tcp_pcb * tcp_new (void); +struct tcp_pcb * tcp_new_ip_type (u8_t type); + +void tcp_arg (struct tcp_pcb *pcb, void *arg); +#if LWIP_CALLBACK_API +void tcp_recv (struct tcp_pcb *pcb, tcp_recv_fn recv); +void tcp_sent (struct tcp_pcb *pcb, tcp_sent_fn sent); +void tcp_err (struct tcp_pcb *pcb, tcp_err_fn err); +void tcp_accept (struct tcp_pcb *pcb, tcp_accept_fn accept); +#endif /* LWIP_CALLBACK_API */ +void tcp_poll (struct tcp_pcb *pcb, tcp_poll_fn poll, u8_t interval); + +#define tcp_set_flags(pcb, set_flags) do { (pcb)->flags = (tcpflags_t)((pcb)->flags | (set_flags)); } while(0) +#define tcp_clear_flags(pcb, clr_flags) do { (pcb)->flags = (tcpflags_t)((pcb)->flags & (tcpflags_t)(~(clr_flags) & TCP_ALLFLAGS)); } while(0) +#define tcp_is_flag_set(pcb, flag) (((pcb)->flags & (flag)) != 0) + +#if LWIP_TCP_TIMESTAMPS +#define tcp_mss(pcb) (((pcb)->flags & TF_TIMESTAMP) ? ((pcb)->mss - 12) : (pcb)->mss) +#else /* LWIP_TCP_TIMESTAMPS */ +/** @ingroup tcp_raw */ +#define tcp_mss(pcb) ((pcb)->mss) +#endif /* LWIP_TCP_TIMESTAMPS */ +/** @ingroup tcp_raw */ +#define tcp_sndbuf(pcb) (TCPWND16((pcb)->snd_buf)) +/** @ingroup tcp_raw */ +#define tcp_sndqueuelen(pcb) ((pcb)->snd_queuelen) +/** @ingroup tcp_raw */ +#define tcp_nagle_disable(pcb) tcp_set_flags(pcb, TF_NODELAY) +/** @ingroup tcp_raw */ +#define tcp_nagle_enable(pcb) tcp_clear_flags(pcb, TF_NODELAY) +/** @ingroup tcp_raw */ +#define tcp_nagle_disabled(pcb) tcp_is_flag_set(pcb, TF_NODELAY) + +#if TCP_LISTEN_BACKLOG +#define tcp_backlog_set(pcb, new_backlog) do { \ + LWIP_ASSERT("pcb->state == LISTEN (called for wrong pcb?)", (pcb)->state == LISTEN); \ + ((struct tcp_pcb_listen *)(pcb))->backlog = ((new_backlog) ? (new_backlog) : 1); } while(0) +void tcp_backlog_delayed(struct tcp_pcb* pcb); +void tcp_backlog_accepted(struct tcp_pcb* pcb); +#else /* TCP_LISTEN_BACKLOG */ +#define tcp_backlog_set(pcb, new_backlog) +#define tcp_backlog_delayed(pcb) +#define tcp_backlog_accepted(pcb) +#endif /* TCP_LISTEN_BACKLOG */ +#define tcp_accepted(pcb) do { LWIP_UNUSED_ARG(pcb); } while(0) /* compatibility define, not needed any more */ + +void tcp_recved (struct tcp_pcb *pcb, u16_t len); +err_t tcp_bind (struct tcp_pcb *pcb, const ip_addr_t *ipaddr, + u16_t port); +void tcp_bind_netif(struct tcp_pcb *pcb, const struct netif *netif); +err_t tcp_connect (struct tcp_pcb *pcb, const ip_addr_t *ipaddr, + u16_t port, tcp_connected_fn connected); + +struct tcp_pcb * tcp_listen_with_backlog_and_err(struct tcp_pcb *pcb, u8_t backlog, err_t *err); +struct tcp_pcb * tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog); +/** @ingroup tcp_raw */ +#define tcp_listen(pcb) tcp_listen_with_backlog(pcb, TCP_DEFAULT_LISTEN_BACKLOG) + +void tcp_abort (struct tcp_pcb *pcb); +err_t tcp_close (struct tcp_pcb *pcb); +err_t tcp_shutdown(struct tcp_pcb *pcb, int shut_rx, int shut_tx); + +err_t tcp_write (struct tcp_pcb *pcb, const void *dataptr, u16_t len, + u8_t apiflags); + +void tcp_setprio (struct tcp_pcb *pcb, u8_t prio); + +err_t tcp_output (struct tcp_pcb *pcb); + +err_t tcp_tcp_get_tcp_addrinfo(struct tcp_pcb *pcb, int local, ip_addr_t *addr, u16_t *port); + +#define tcp_dbg_get_tcp_state(pcb) ((pcb)->state) + +/* for compatibility with older implementation */ +#define tcp_new_ip6() tcp_new_ip_type(IPADDR_TYPE_V6) + +#if LWIP_TCP_PCB_NUM_EXT_ARGS +u8_t tcp_ext_arg_alloc_id(void); +void tcp_ext_arg_set_callbacks(struct tcp_pcb *pcb, u8_t id, const struct tcp_ext_arg_callbacks * const callbacks); +void tcp_ext_arg_set(struct tcp_pcb *pcb, u8_t id, void *arg); +void *tcp_ext_arg_get(const struct tcp_pcb *pcb, u8_t id); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_TCP */ + +#endif /* LWIP_HDR_TCP_H */ diff --git a/lib/lwip/include/lwip/tcpbase.h b/lib/lwip/include/lwip/tcpbase.h new file mode 100644 index 0000000000..018790f1f9 --- /dev/null +++ b/lib/lwip/include/lwip/tcpbase.h @@ -0,0 +1,88 @@ +/** + * @file + * Base TCP API definitions shared by TCP and ALTCP<br> + * See also @ref tcp_raw + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_TCPBASE_H +#define LWIP_HDR_TCPBASE_H + +#include "lwip/opt.h" + +#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ + +#ifdef __cplusplus +extern "C" { +#endif + + +#if LWIP_WND_SCALE +typedef u32_t tcpwnd_size_t; +#else +typedef u16_t tcpwnd_size_t; +#endif + +enum tcp_state { + CLOSED = 0, + LISTEN = 1, + SYN_SENT = 2, + SYN_RCVD = 3, + ESTABLISHED = 4, + FIN_WAIT_1 = 5, + FIN_WAIT_2 = 6, + CLOSE_WAIT = 7, + CLOSING = 8, + LAST_ACK = 9, + TIME_WAIT = 10 +}; +/* ATTENTION: this depends on state number ordering! */ +#define TCP_STATE_IS_CLOSING(state) ((state) >= FIN_WAIT_1) + +/* Flags for "apiflags" parameter in tcp_write */ +#define TCP_WRITE_FLAG_COPY 0x01 +#define TCP_WRITE_FLAG_MORE 0x02 + +#define TCP_PRIO_MIN 1 +#define TCP_PRIO_NORMAL 64 +#define TCP_PRIO_MAX 127 + +const char* tcp_debug_state_str(enum tcp_state s); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_TCP */ + +#endif /* LWIP_HDR_TCPBASE_H */ diff --git a/lib/lwip/include/lwip/tcpip.h b/lib/lwip/include/lwip/tcpip.h new file mode 100644 index 0000000000..30ce4fef1e --- /dev/null +++ b/lib/lwip/include/lwip/tcpip.h @@ -0,0 +1,114 @@ +/** + * @file + * Functions to sync with TCPIP thread + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_TCPIP_H +#define LWIP_HDR_TCPIP_H + +#include "lwip/opt.h" + +#if !NO_SYS /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/err.h" +#include "lwip/timeouts.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_TCPIP_CORE_LOCKING +/** The global semaphore to lock the stack. */ +extern sys_mutex_t lock_tcpip_core; +#if !defined LOCK_TCPIP_CORE || defined __DOXYGEN__ +/** Lock lwIP core mutex (needs @ref LWIP_TCPIP_CORE_LOCKING 1) */ +#define LOCK_TCPIP_CORE() sys_mutex_lock(&lock_tcpip_core) +/** Unlock lwIP core mutex (needs @ref LWIP_TCPIP_CORE_LOCKING 1) */ +#define UNLOCK_TCPIP_CORE() sys_mutex_unlock(&lock_tcpip_core) +#endif /* LOCK_TCPIP_CORE */ +#else /* LWIP_TCPIP_CORE_LOCKING */ +#define LOCK_TCPIP_CORE() +#define UNLOCK_TCPIP_CORE() +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +struct pbuf; +struct netif; + +/** Function prototype for the init_done function passed to tcpip_init */ +typedef void (*tcpip_init_done_fn)(void *arg); +/** Function prototype for functions passed to tcpip_callback() */ +typedef void (*tcpip_callback_fn)(void *ctx); + +/* Forward declarations */ +struct tcpip_callback_msg; + +void tcpip_init(tcpip_init_done_fn tcpip_init_done, void *arg); + +err_t tcpip_inpkt(struct pbuf *p, struct netif *inp, netif_input_fn input_fn); +err_t tcpip_input(struct pbuf *p, struct netif *inp); + +err_t tcpip_try_callback(tcpip_callback_fn function, void *ctx); +err_t tcpip_callback(tcpip_callback_fn function, void *ctx); +err_t tcpip_callback_wait(tcpip_callback_fn function, void *ctx); +/** @ingroup lwip_os + * @deprecated use tcpip_try_callback() or tcpip_callback() instead + */ +#define tcpip_callback_with_block(function, ctx, block) ((block != 0)? tcpip_callback(function, ctx) : tcpip_try_callback(function, ctx)) + +struct tcpip_callback_msg* tcpip_callbackmsg_new(tcpip_callback_fn function, void *ctx); +void tcpip_callbackmsg_delete(struct tcpip_callback_msg* msg); +err_t tcpip_callbackmsg_trycallback(struct tcpip_callback_msg* msg); +err_t tcpip_callbackmsg_trycallback_fromisr(struct tcpip_callback_msg* msg); + +/* free pbufs or heap memory from another context without blocking */ +err_t pbuf_free_callback(struct pbuf *p); +err_t mem_free_callback(void *m); + +#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS +err_t tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg); +err_t tcpip_untimeout(sys_timeout_handler h, void *arg); +#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */ + +#ifdef TCPIP_THREAD_TEST +int tcpip_thread_poll_one(void); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* !NO_SYS */ + +#endif /* LWIP_HDR_TCPIP_H */ diff --git a/lib/lwip/include/lwip/timeouts.h b/lib/lwip/include/lwip/timeouts.h new file mode 100644 index 0000000000..b601f9eb34 --- /dev/null +++ b/lib/lwip/include/lwip/timeouts.h @@ -0,0 +1,128 @@ +/** + * @file + * Timer implementations + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * Simon Goldschmidt + * + */ +#ifndef LWIP_HDR_TIMEOUTS_H +#define LWIP_HDR_TIMEOUTS_H + +#include "lwip/opt.h" +#include "lwip/err.h" +#if !NO_SYS +#include "lwip/sys.h" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef LWIP_DEBUG_TIMERNAMES +#ifdef LWIP_DEBUG +#define LWIP_DEBUG_TIMERNAMES SYS_DEBUG +#else /* LWIP_DEBUG */ +#define LWIP_DEBUG_TIMERNAMES 0 +#endif /* LWIP_DEBUG*/ +#endif + +/** Returned by sys_timeouts_sleeptime() to indicate there is no timer, so we + * can sleep forever. + */ +#define SYS_TIMEOUTS_SLEEPTIME_INFINITE 0xFFFFFFFF + +/** Function prototype for a stack-internal timer function that has to be + * called at a defined interval */ +typedef void (* lwip_cyclic_timer_handler)(void); + +/** This struct contains information about a stack-internal timer function + that has to be called at a defined interval */ +struct lwip_cyclic_timer { + u32_t interval_ms; + lwip_cyclic_timer_handler handler; +#if LWIP_DEBUG_TIMERNAMES + const char* handler_name; +#endif /* LWIP_DEBUG_TIMERNAMES */ +}; + +/** This array contains all stack-internal cyclic timers. To get the number of + * timers, use lwip_num_cyclic_timers */ +extern const struct lwip_cyclic_timer lwip_cyclic_timers[]; +/** Array size of lwip_cyclic_timers[] */ +extern const int lwip_num_cyclic_timers; + +#if LWIP_TIMERS + +/** Function prototype for a timeout callback function. Register such a function + * using sys_timeout(). + * + * @param arg Additional argument to pass to the function - set up by sys_timeout() + */ +typedef void (* sys_timeout_handler)(void *arg); + +struct sys_timeo { + struct sys_timeo *next; + u32_t time; + sys_timeout_handler h; + void *arg; +#if LWIP_DEBUG_TIMERNAMES + const char* handler_name; +#endif /* LWIP_DEBUG_TIMERNAMES */ +}; + +void sys_timeouts_init(void); + +#if LWIP_DEBUG_TIMERNAMES +void sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char* handler_name); +#define sys_timeout(msecs, handler, arg) sys_timeout_debug(msecs, handler, arg, #handler) +#else /* LWIP_DEBUG_TIMERNAMES */ +void sys_timeout(u32_t msecs, sys_timeout_handler handler, void *arg); +#endif /* LWIP_DEBUG_TIMERNAMES */ + +void sys_untimeout(sys_timeout_handler handler, void *arg); +void sys_restart_timeouts(void); +void sys_check_timeouts(void); +u32_t sys_timeouts_sleeptime(void); + +#if LWIP_TESTMODE +struct sys_timeo** sys_timeouts_get_next_timeout(void); +void lwip_cyclic_timer(void *arg); +#endif + +#endif /* LWIP_TIMERS */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_TIMEOUTS_H */ diff --git a/lib/lwip/include/lwip/udp.h b/lib/lwip/include/lwip/udp.h new file mode 100644 index 0000000000..f1deae3e44 --- /dev/null +++ b/lib/lwip/include/lwip/udp.h @@ -0,0 +1,195 @@ +/** + * @file + * UDP API (to be used from TCPIP thread)<br> + * See also @ref udp_raw + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_UDP_H +#define LWIP_HDR_UDP_H + +#include "lwip/opt.h" + +#if LWIP_UDP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/pbuf.h" +#include "lwip/netif.h" +#include "lwip/ip_addr.h" +#include "lwip/ip.h" +#include "lwip/ip6_addr.h" +#include "lwip/prot/udp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define UDP_FLAGS_NOCHKSUM 0x01U +#define UDP_FLAGS_UDPLITE 0x02U +#define UDP_FLAGS_CONNECTED 0x04U +#define UDP_FLAGS_MULTICAST_LOOP 0x08U + +struct udp_pcb; + +/** Function prototype for udp pcb receive callback functions + * addr and port are in same byte order as in the pcb + * The callback is responsible for freeing the pbuf + * if it's not used any more. + * + * ATTENTION: Be aware that 'addr' might point into the pbuf 'p' so freeing this pbuf + * can make 'addr' invalid, too. + * + * @param arg user supplied argument (udp_pcb.recv_arg) + * @param pcb the udp_pcb which received data + * @param p the packet buffer that was received + * @param addr the remote IP address from which the packet was received + * @param port the remote port from which the packet was received + */ +typedef void (*udp_recv_fn)(void *arg, struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *addr, u16_t port); + +/** the UDP protocol control block */ +struct udp_pcb { +/** Common members of all PCB types */ + IP_PCB; + +/* Protocol specific PCB members */ + + struct udp_pcb *next; + + u8_t flags; + /** ports are in host byte order */ + u16_t local_port, remote_port; + +#if LWIP_MULTICAST_TX_OPTIONS +#if LWIP_IPV4 + /** outgoing network interface for multicast packets, by IPv4 address (if not 'any') */ + ip4_addr_t mcast_ip4; +#endif /* LWIP_IPV4 */ + /** outgoing network interface for multicast packets, by interface index (if nonzero) */ + u8_t mcast_ifindex; + /** TTL for outgoing multicast packets */ + u8_t mcast_ttl; +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + +#if LWIP_UDPLITE + /** used for UDP_LITE only */ + u16_t chksum_len_rx, chksum_len_tx; +#endif /* LWIP_UDPLITE */ + + /** receive callback function */ + udp_recv_fn recv; + /** user-supplied argument for the recv callback */ + void *recv_arg; +}; +/* udp_pcbs export for external reference (e.g. SNMP agent) */ +extern struct udp_pcb *udp_pcbs; + +/* The following functions is the application layer interface to the + UDP code. */ +struct udp_pcb * udp_new (void); +struct udp_pcb * udp_new_ip_type(u8_t type); +void udp_remove (struct udp_pcb *pcb); +err_t udp_bind (struct udp_pcb *pcb, const ip_addr_t *ipaddr, + u16_t port); +void udp_bind_netif (struct udp_pcb *pcb, const struct netif* netif); +err_t udp_connect (struct udp_pcb *pcb, const ip_addr_t *ipaddr, + u16_t port); +void udp_disconnect (struct udp_pcb *pcb); +void udp_recv (struct udp_pcb *pcb, udp_recv_fn recv, + void *recv_arg); +err_t udp_sendto_if (struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port, + struct netif *netif); +err_t udp_sendto_if_src(struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port, + struct netif *netif, const ip_addr_t *src_ip); +err_t udp_sendto (struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port); +err_t udp_send (struct udp_pcb *pcb, struct pbuf *p); + +#if LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP +err_t udp_sendto_if_chksum(struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port, + struct netif *netif, u8_t have_chksum, + u16_t chksum); +err_t udp_sendto_chksum(struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port, + u8_t have_chksum, u16_t chksum); +err_t udp_send_chksum(struct udp_pcb *pcb, struct pbuf *p, + u8_t have_chksum, u16_t chksum); +err_t udp_sendto_if_src_chksum(struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *dst_ip, u16_t dst_port, struct netif *netif, + u8_t have_chksum, u16_t chksum, const ip_addr_t *src_ip); +#endif /* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */ + +#define udp_flags(pcb) ((pcb)->flags) +#define udp_setflags(pcb, f) ((pcb)->flags = (f)) + +#define udp_set_flags(pcb, set_flags) do { (pcb)->flags = (u8_t)((pcb)->flags | (set_flags)); } while(0) +#define udp_clear_flags(pcb, clr_flags) do { (pcb)->flags = (u8_t)((pcb)->flags & (u8_t)(~(clr_flags) & 0xff)); } while(0) +#define udp_is_flag_set(pcb, flag) (((pcb)->flags & (flag)) != 0) + +/* The following functions are the lower layer interface to UDP. */ +void udp_input (struct pbuf *p, struct netif *inp); + +void udp_init (void); + +/* for compatibility with older implementation */ +#define udp_new_ip6() udp_new_ip_type(IPADDR_TYPE_V6) + +#if LWIP_MULTICAST_TX_OPTIONS +#if LWIP_IPV4 +#define udp_set_multicast_netif_addr(pcb, ip4addr) ip4_addr_copy((pcb)->mcast_ip4, *(ip4addr)) +#define udp_get_multicast_netif_addr(pcb) (&(pcb)->mcast_ip4) +#endif /* LWIP_IPV4 */ +#define udp_set_multicast_netif_index(pcb, idx) ((pcb)->mcast_ifindex = (idx)) +#define udp_get_multicast_netif_index(pcb) ((pcb)->mcast_ifindex) +#define udp_set_multicast_ttl(pcb, value) ((pcb)->mcast_ttl = (value)) +#define udp_get_multicast_ttl(pcb) ((pcb)->mcast_ttl) +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + +#if UDP_DEBUG +void udp_debug_print(struct udp_hdr *udphdr); +#else +#define udp_debug_print(udphdr) +#endif + +void udp_netif_ip_addr_changed(const ip_addr_t* old_addr, const ip_addr_t* new_addr); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_UDP */ + +#endif /* LWIP_HDR_UDP_H */ diff --git a/lib/lwip/include/netif/bridgeif.h b/lib/lwip/include/netif/bridgeif.h new file mode 100644 index 0000000000..f4f8cf1440 --- /dev/null +++ b/lib/lwip/include/netif/bridgeif.h @@ -0,0 +1,127 @@ +/** + * @file + * lwIP netif implementing an IEEE 802.1D MAC Bridge + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ +#ifndef LWIP_HDR_NETIF_BRIDGEIF_H +#define LWIP_HDR_NETIF_BRIDGEIF_H + +#include "netif/bridgeif_opts.h" + +#include "lwip/err.h" +#include "lwip/prot/ethernet.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct netif; + +#if (BRIDGEIF_MAX_PORTS < 0) || (BRIDGEIF_MAX_PORTS >= 64) +#error BRIDGEIF_MAX_PORTS must be [1..63] +#elif BRIDGEIF_MAX_PORTS < 8 +typedef u8_t bridgeif_portmask_t; +#elif BRIDGEIF_MAX_PORTS < 16 +typedef u16_t bridgeif_portmask_t; +#elif BRIDGEIF_MAX_PORTS < 32 +typedef u32_t bridgeif_portmask_t; +#elif BRIDGEIF_MAX_PORTS < 64 +typedef u64_t bridgeif_portmask_t; +#endif + +#define BR_FLOOD ((bridgeif_portmask_t)-1) + +/** @ingroup bridgeif + * Initialisation data for @ref bridgeif_init. + * An instance of this type must be passed as parameter 'state' to @ref netif_add + * when the bridge is added. + */ +typedef struct bridgeif_initdata_s { + /** MAC address of the bridge (cannot use the netif's addresses) */ + struct eth_addr ethaddr; + /** Maximum number of ports in the bridge (ports are stored in an array, this + influences memory allocated for netif->state of the bridge netif). */ + u8_t max_ports; + /** Maximum number of dynamic/learning entries in the bridge's forwarding database. + In the default implementation, this controls memory consumption only. */ + u16_t max_fdb_dynamic_entries; + /** Maximum number of static forwarding entries. Influences memory consumption! */ + u16_t max_fdb_static_entries; +} bridgeif_initdata_t; + +/** @ingroup bridgeif + * Use this for constant initialization of a bridgeif_initdat_t + * (ethaddr must be passed as ETH_ADDR()) + */ +#define BRIDGEIF_INITDATA1(max_ports, max_fdb_dynamic_entries, max_fdb_static_entries, ethaddr) {ethaddr, max_ports, max_fdb_dynamic_entries, max_fdb_static_entries} +/** @ingroup bridgeif + * Use this for constant initialization of a bridgeif_initdat_t + * (each byte of ethaddr must be passed) + */ +#define BRIDGEIF_INITDATA2(max_ports, max_fdb_dynamic_entries, max_fdb_static_entries, e0, e1, e2, e3, e4, e5) {{e0, e1, e2, e3, e4, e5}, max_ports, max_fdb_dynamic_entries, max_fdb_static_entries} + +err_t bridgeif_init(struct netif *netif); +err_t bridgeif_add_port(struct netif *bridgeif, struct netif *portif); +err_t bridgeif_fdb_add(struct netif *bridgeif, const struct eth_addr *addr, bridgeif_portmask_t ports); +err_t bridgeif_fdb_remove(struct netif *bridgeif, const struct eth_addr *addr); + +/* FDB interface, can be replaced by own implementation */ +void bridgeif_fdb_update_src(void *fdb_ptr, struct eth_addr *src_addr, u8_t port_idx); +bridgeif_portmask_t bridgeif_fdb_get_dst_ports(void *fdb_ptr, struct eth_addr *dst_addr); +void* bridgeif_fdb_init(u16_t max_fdb_entries); + +#if BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT +#ifndef BRIDGEIF_DECL_PROTECT +/* define bridgeif protection to sys_arch_protect... */ +#include "lwip/sys.h" +#define BRIDGEIF_DECL_PROTECT(lev) SYS_ARCH_DECL_PROTECT(lev) +#define BRIDGEIF_READ_PROTECT(lev) SYS_ARCH_PROTECT(lev) +#define BRIDGEIF_READ_UNPROTECT(lev) SYS_ARCH_UNPROTECT(lev) +#define BRIDGEIF_WRITE_PROTECT(lev) +#define BRIDGEIF_WRITE_UNPROTECT(lev) +#endif +#else /* BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT */ +#include "lwip/tcpip.h" +#define BRIDGEIF_DECL_PROTECT(lev) +#define BRIDGEIF_READ_PROTECT(lev) +#define BRIDGEIF_READ_UNPROTECT(lev) +#define BRIDGEIF_WRITE_PROTECT(lev) +#define BRIDGEIF_WRITE_UNPROTECT(lev) +#endif /* BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_NETIF_BRIDGEIF_H */ diff --git a/lib/lwip/include/netif/bridgeif_opts.h b/lib/lwip/include/netif/bridgeif_opts.h new file mode 100644 index 0000000000..b85c301749 --- /dev/null +++ b/lib/lwip/include/netif/bridgeif_opts.h @@ -0,0 +1,90 @@ +/** + * @file + * lwIP netif implementing an IEEE 802.1D MAC Bridge + */ + +/* + * Copyright (c) 2017 Simon Goldschmidt. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ + +#ifndef LWIP_HDR_NETIF_BRIDGEIF_OPTS_H +#define LWIP_HDR_NETIF_BRIDGEIF_OPTS_H + +#include "lwip/opt.h" + +/** + * @defgroup bridgeif_opts Options + * @ingroup bridgeif + * @{ + */ + +/** BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT==1: set port netif's 'input' function + * to call directly into bridgeif code and on top of that, directly call into + * the selected forwarding port's 'linkoutput' function. + * This means that the bridgeif input/output path is protected from concurrent access + * but as well, *all* bridge port netif's drivers must correctly handle concurrent access! + * == 0: get into tcpip_thread for every input packet (no multithreading) + * ATTENTION: as ==0 relies on tcpip.h, the default depends on NO_SYS setting + */ +#ifndef BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT +#define BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT NO_SYS +#endif + +/** BRIDGEIF_MAX_PORTS: this is used to create a typedef used for forwarding + * bit-fields: the number of bits required is this + 1 (for the internal/cpu port) + * (63 is the maximum, resulting in an u64_t for the bit mask) + * ATTENTION: this controls the maximum number of the implementation only! + * The max. number of ports per bridge must still be passed via netif_add parameter! + */ +#ifndef BRIDGEIF_MAX_PORTS +#define BRIDGEIF_MAX_PORTS 7 +#endif + +/** BRIDGEIF_DEBUG: Enable generic debugging in bridgeif.c. */ +#ifndef BRIDGEIF_DEBUG +#define BRIDGEIF_DEBUG LWIP_DBG_OFF +#endif + +/** BRIDGEIF_DEBUG: Enable FDB debugging in bridgeif.c. */ +#ifndef BRIDGEIF_FDB_DEBUG +#define BRIDGEIF_FDB_DEBUG LWIP_DBG_OFF +#endif + +/** BRIDGEIF_DEBUG: Enable forwarding debugging in bridgeif.c. */ +#ifndef BRIDGEIF_FW_DEBUG +#define BRIDGEIF_FW_DEBUG LWIP_DBG_OFF +#endif + +/** + * @} + */ + +#endif /* LWIP_HDR_NETIF_BRIDGEIF_OPTS_H */ diff --git a/lib/lwip/include/netif/etharp.h b/lib/lwip/include/netif/etharp.h new file mode 100644 index 0000000000..b536fd280f --- /dev/null +++ b/lib/lwip/include/netif/etharp.h @@ -0,0 +1,3 @@ +/* ARP has been moved to core/ipv4, provide this #include for compatibility only */ +#include "lwip/etharp.h" +#include "netif/ethernet.h" diff --git a/lib/lwip/include/netif/ethernet.h b/lib/lwip/include/netif/ethernet.h new file mode 100644 index 0000000000..49649cbf8b --- /dev/null +++ b/lib/lwip/include/netif/ethernet.h @@ -0,0 +1,77 @@ +/** + * @file + * Ethernet input function - handles INCOMING ethernet level traffic + * To be used in most low-level netif implementations + */ + +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * Copyright (c) 2003-2004 Leon Woestenberg leon.woestenberg@axon.tv + * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ + +#ifndef LWIP_HDR_NETIF_ETHERNET_H +#define LWIP_HDR_NETIF_ETHERNET_H + +#include "lwip/opt.h" + +#include "lwip/pbuf.h" +#include "lwip/netif.h" +#include "lwip/prot/ethernet.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_ARP || LWIP_ETHERNET + +/** Define this to 1 and define LWIP_ARP_FILTER_NETIF_FN(pbuf, netif, type) + * to a filter function that returns the correct netif when using multiple + * netifs on one hardware interface where the netif's low-level receive + * routine cannot decide for the correct netif (e.g. when mapping multiple + * IP addresses to one hardware interface). + */ +#ifndef LWIP_ARP_FILTER_NETIF +#define LWIP_ARP_FILTER_NETIF 0 +#endif + +err_t ethernet_input(struct pbuf *p, struct netif *netif); +err_t ethernet_output(struct netif* netif, struct pbuf* p, const struct eth_addr* src, const struct eth_addr* dst, u16_t eth_type); + +extern const struct eth_addr ethbroadcast, ethzero; + +#endif /* LWIP_ARP || LWIP_ETHERNET */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_NETIF_ETHERNET_H */ diff --git a/lib/lwip/include/netif/ieee802154.h b/lib/lwip/include/netif/ieee802154.h new file mode 100644 index 0000000000..54e019fd0a --- /dev/null +++ b/lib/lwip/include/netif/ieee802154.h @@ -0,0 +1,112 @@ +/** + * @file + * Definitions for IEEE 802.15.4 MAC frames + */ + +/* + * Copyright (c) 2018 Simon Goldschmidt. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ +#ifndef LWIP_HDR_NETIF_IEEE802154_H +#define LWIP_HDR_NETIF_IEEE802154_H + +#include "lwip/opt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** General MAC frame format + * This shows the full featured header, mainly for documentation. + * Some fields are omitted or shortened to achieve frame compression. + */ +struct ieee_802154_hdr { + /** See IEEE_802154_FC_* defines */ + PACK_STRUCT_FIELD(u16_t frame_control); + /** Sequence number is omitted if IEEE_802154_FC_SEQNO_SUPPR is set in frame_control */ + PACK_STRUCT_FLD_8(u8_t sequence_number); + /** Destination PAN ID is omitted if Destination Addressing Mode is 0 */ + PACK_STRUCT_FIELD(u16_t destination_pan_id); + /** Destination Address is omitted if Destination Addressing Mode is 0 */ + PACK_STRUCT_FLD_8(u8_t destination_address[8]); + /** Source PAN ID is omitted if Source Addressing Mode is 0 + or if IEEE_802154_FC_PANID_COMPR is set in frame control*/ + PACK_STRUCT_FIELD(u16_t source_pan_id); + /** Source Address is omitted if Source Addressing Mode is 0 */ + PACK_STRUCT_FLD_8(u8_t source_address[8]); + /* The rest is variable */ +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/* Addressing modes (2 bits) */ +#define IEEE_802154_ADDR_MODE_NO_ADDR 0x00 /* PAN ID and address fields are not present */ +#define IEEE_802154_ADDR_MODE_RESERVED 0x01 /* Reserved */ +#define IEEE_802154_ADDR_MODE_SHORT 0x02 /* Address field contains a short address (16 bit) */ +#define IEEE_802154_ADDR_MODE_EXT 0x03 /* Address field contains an extended address (64 bit) */ + +/* IEEE 802.15.4 Frame Control definitions (2 bytes; see IEEE 802.15.4-2015 ch. 7.2.1) */ +#define IEEE_802154_FC_FT_MASK 0x0007 /* bits 0..2: Frame Type */ +#define IEEE_802154_FC_FT_BEACON 0x00 +#define IEEE_802154_FC_FT_DATA 0x01 +#define IEEE_802154_FC_FT_ACK 0x02 +#define IEEE_802154_FC_FT_MAC_CMD 0x03 +#define IEEE_802154_FC_FT_RESERVED 0x04 +#define IEEE_802154_FC_FT_MULTIPURPOSE 0x05 +#define IEEE_802154_FC_FT_FRAG 0x06 +#define IEEE_802154_FC_FT_EXT 0x07 +#define IEEE_802154_FC_SEC_EN 0x0008 /* bit 3: Security Enabled */ +#define IEEE_802154_FC_FRAME_PEND 0x0010 /* bit 4: Frame Pending */ +#define IEEE_802154_FC_ACK_REQ 0x0020 /* bit 5: AR (ACK required) */ +#define IEEE_802154_FC_PANID_COMPR 0x0040 /* bit 6: PAN ID Compression (src and dst are equal, src PAN ID omitted) */ +#define IEEE_802154_FC_RESERVED 0x0080 +#define IEEE_802154_FC_SEQNO_SUPPR 0x0100 /* bit 8: Sequence Number Suppression */ +#define IEEE_802154_FC_IE_PRESENT 0x0200 /* bit 9: IE Present */ +#define IEEE_802154_FC_DST_ADDR_MODE_MASK 0x0c00 /* bits 10..11: Destination Addressing Mode */ +#define IEEE_802154_FC_DST_ADDR_MODE_NO_ADDR (IEEE_802154_ADDR_MODE_NO_ADDR << 10) +#define IEEE_802154_FC_DST_ADDR_MODE_SHORT (IEEE_802154_ADDR_MODE_SHORT << 10) +#define IEEE_802154_FC_DST_ADDR_MODE_EXT (IEEE_802154_ADDR_MODE_EXT << 10) +#define IEEE_802154_FC_FRAME_VERSION_MASK 0x3000 /* bits 12..13: Frame Version */ +#define IEEE_802154_FC_FRAME_VERSION_GET(x) (((x) & IEEE_802154_FC_FRAME_VERSION_MASK) >> 12) +#define IEEE_802154_FC_SRC_ADDR_MODE_MASK 0xc000 /* bits 14..15: Source Addressing Mode */ +#define IEEE_802154_FC_SRC_ADDR_MODE_SHORT (IEEE_802154_ADDR_MODE_SHORT << 14) +#define IEEE_802154_FC_SRC_ADDR_MODE_EXT (IEEE_802154_ADDR_MODE_EXT << 14) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_NETIF_IEEE802154_H */ diff --git a/lib/lwip/include/netif/lowpan6.h b/lib/lwip/include/netif/lowpan6.h new file mode 100644 index 0000000000..ecff24ba66 --- /dev/null +++ b/lib/lwip/include/netif/lowpan6.h @@ -0,0 +1,89 @@ +/** + * @file + * + * 6LowPAN output for IPv6. Uses ND tables for link-layer addressing. Fragments packets to 6LowPAN units. + */ + +/* + * Copyright (c) 2015 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#ifndef LWIP_HDR_LOWPAN6_H +#define LWIP_HDR_LOWPAN6_H + +#include "netif/lowpan6_opts.h" + +#if LWIP_IPV6 + +#include "netif/lowpan6_common.h" +#include "lwip/pbuf.h" +#include "lwip/ip.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** 1 second period for reassembly */ +#define LOWPAN6_TMR_INTERVAL 1000 + +void lowpan6_tmr(void); + +err_t lowpan6_set_context(u8_t idx, const ip6_addr_t * context); +err_t lowpan6_set_short_addr(u8_t addr_high, u8_t addr_low); + +#if LWIP_IPV4 +err_t lowpan4_output(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr); +#endif /* LWIP_IPV4 */ +err_t lowpan6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr); +err_t lowpan6_input(struct pbuf * p, struct netif *netif); +err_t lowpan6_if_init(struct netif *netif); + +/* pan_id in network byte order. */ +err_t lowpan6_set_pan_id(u16_t pan_id); + +u16_t lowpan6_calc_crc(const void *buf, u16_t len); + +#if !NO_SYS +err_t tcpip_6lowpan_input(struct pbuf *p, struct netif *inp); +#endif /* !NO_SYS */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 */ + +#endif /* LWIP_HDR_LOWPAN6_H */ diff --git a/lib/lwip/include/netif/lowpan6_ble.h b/lib/lwip/include/netif/lowpan6_ble.h new file mode 100644 index 0000000000..ff35fcd37b --- /dev/null +++ b/lib/lwip/include/netif/lowpan6_ble.h @@ -0,0 +1,78 @@ +/** + * @file + * 6LowPAN over BLE for IPv6 (RFC7668). + */ + +/* + * Copyright (c) 2017 Benjamin Aigner + * Copyright (c) 2015 Inico Technologies Ltd. , Author: Ivan Delamer delamer@inicotech.com + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Benjamin Aigner aignerb@technikum-wien.at + * + * Based on the original 6lowpan implementation of lwIP ( @see 6lowpan.c) + */ + +#ifndef LWIP_HDR_LOWPAN6_BLE_H +#define LWIP_HDR_LOWPAN6_BLE_H + +#include "netif/lowpan6_opts.h" + +#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ + +#include "netif/lowpan6_common.h" +#include "lwip/pbuf.h" +#include "lwip/ip.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +err_t rfc7668_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr); +err_t rfc7668_input(struct pbuf * p, struct netif *netif); +err_t rfc7668_set_local_addr_eui64(struct netif *netif, const u8_t *local_addr, size_t local_addr_len); +err_t rfc7668_set_local_addr_mac48(struct netif *netif, const u8_t *local_addr, size_t local_addr_len, int is_public_addr); +err_t rfc7668_set_peer_addr_eui64(struct netif *netif, const u8_t *peer_addr, size_t peer_addr_len); +err_t rfc7668_set_peer_addr_mac48(struct netif *netif, const u8_t *peer_addr, size_t peer_addr_len, int is_public_addr); +err_t rfc7668_set_context(u8_t index, const ip6_addr_t * context); +err_t rfc7668_if_init(struct netif *netif); + +#if !NO_SYS +err_t tcpip_rfc7668_input(struct pbuf *p, struct netif *inp); +#endif + +void ble_addr_to_eui64(u8_t *dst, const u8_t *src, int public_addr); +void eui64_to_ble_addr(u8_t *dst, const u8_t *src); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 */ + +#endif /* LWIP_HDR_LOWPAN6_BLE_H */ diff --git a/lib/lwip/include/netif/lowpan6_common.h b/lib/lwip/include/netif/lowpan6_common.h new file mode 100644 index 0000000000..0dc13ab5bf --- /dev/null +++ b/lib/lwip/include/netif/lowpan6_common.h @@ -0,0 +1,82 @@ +/** + * @file + * + * Common 6LowPAN routines for IPv6. Uses ND tables for link-layer addressing. Fragments packets to 6LowPAN units. + */ + +/* + * Copyright (c) 2015 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#ifndef LWIP_HDR_LOWPAN6_COMMON_H +#define LWIP_HDR_LOWPAN6_COMMON_H + +#include "netif/lowpan6_opts.h" + +#if LWIP_IPV6 /* don't build if IPv6 is disabled in lwipopts.h */ + +#include "lwip/pbuf.h" +#include "lwip/ip.h" +#include "lwip/ip6_addr.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** Helper define for a link layer address, which can be encoded as 0, 2 or 8 bytes */ +struct lowpan6_link_addr { + /* encoded length of the address */ + u8_t addr_len; + /* address bytes */ + u8_t addr[8]; +}; + +s8_t lowpan6_get_address_mode(const ip6_addr_t *ip6addr, const struct lowpan6_link_addr *mac_addr); + +#if LWIP_6LOWPAN_IPHC +err_t lowpan6_compress_headers(struct netif *netif, u8_t *inbuf, size_t inbuf_size, u8_t *outbuf, size_t outbuf_size, + u8_t *lowpan6_header_len_out, u8_t *hidden_header_len_out, ip6_addr_t *lowpan6_contexts, + const struct lowpan6_link_addr *src, const struct lowpan6_link_addr *dst); +struct pbuf *lowpan6_decompress(struct pbuf *p, u16_t datagram_size, ip6_addr_t *lowpan6_contexts, + struct lowpan6_link_addr *src, struct lowpan6_link_addr *dest); +#endif /* LWIP_6LOWPAN_IPHC */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 */ + +#endif /* LWIP_HDR_LOWPAN6_COMMON_H */ diff --git a/lib/lwip/include/netif/lowpan6_opts.h b/lib/lwip/include/netif/lowpan6_opts.h new file mode 100644 index 0000000000..32e5c5ee14 --- /dev/null +++ b/lib/lwip/include/netif/lowpan6_opts.h @@ -0,0 +1,122 @@ +/** + * @file + * 6LowPAN options list + */ + +/* + * Copyright (c) 2015 Inico Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Ivan Delamer delamer@inicotech.com + * + * + * Please coordinate changes and requests with Ivan Delamer + * delamer@inicotech.com + */ + +#ifndef LWIP_HDR_LOWPAN6_OPTS_H +#define LWIP_HDR_LOWPAN6_OPTS_H + +#include "lwip/opt.h" + +/** LWIP_6LOWPAN_NUM_CONTEXTS: define the number of compression + * contexts per netif type + */ +#ifndef LWIP_6LOWPAN_NUM_CONTEXTS +#define LWIP_6LOWPAN_NUM_CONTEXTS 10 +#endif + +/** LWIP_6LOWPAN_INFER_SHORT_ADDRESS: set this to 0 to disable creating + * short addresses for matching addresses (debug only) + */ +#ifndef LWIP_6LOWPAN_INFER_SHORT_ADDRESS +#define LWIP_6LOWPAN_INFER_SHORT_ADDRESS 1 +#endif + +/** LWIP_6LOWPAN_IPHC: set this to 0 to disable IP header compression as per + * RFC 6282 (which is mandatory for BLE) + */ +#ifndef LWIP_6LOWPAN_IPHC +#define LWIP_6LOWPAN_IPHC 1 +#endif + +/** Set this to 1 if your IEEE 802.15.4 interface can calculate and check the + * CRC in hardware. This means TX packets get 2 zero bytes added on transmission + * which are to be filled with the CRC. + */ +#ifndef LWIP_6LOWPAN_802154_HW_CRC +#define LWIP_6LOWPAN_802154_HW_CRC 0 +#endif + +/** If LWIP_6LOWPAN_802154_HW_CRC==0, this can override the default slow + * implementation of the CRC used for 6LoWPAN over IEEE 802.15.4 (which uses + * a shift register). + */ +#ifndef LWIP_6LOWPAN_CALC_CRC +#define LWIP_6LOWPAN_CALC_CRC(buf, len) lowpan6_calc_crc(buf, len) +#endif + +/** Debug level for 6LoWPAN in general */ +#ifndef LWIP_LOWPAN6_DEBUG +#define LWIP_LOWPAN6_DEBUG LWIP_DBG_OFF +#endif + +/** Debug level for 6LoWPAN over IEEE 802.15.4 */ +#ifndef LWIP_LOWPAN6_802154_DEBUG +#define LWIP_LOWPAN6_802154_DEBUG LWIP_DBG_OFF +#endif + +/** LWIP_LOWPAN6_IP_COMPRESSED_DEBUG: enable compressed IP frame + * output debugging + */ +#ifndef LWIP_LOWPAN6_IP_COMPRESSED_DEBUG +#define LWIP_LOWPAN6_IP_COMPRESSED_DEBUG LWIP_DBG_OFF +#endif + +/** LWIP_LOWPAN6_DECOMPRESSION_DEBUG: enable decompression debug output + */ +#ifndef LWIP_LOWPAN6_DECOMPRESSION_DEBUG +#define LWIP_LOWPAN6_DECOMPRESSION_DEBUG LWIP_DBG_OFF +#endif + +/** LWIP_RFC7668_IP_UNCOMPRESSED_DEBUG: enable decompressed IP frame + * output debugging */ +#ifndef LWIP_RFC7668_IP_UNCOMPRESSED_DEBUG +#define LWIP_RFC7668_IP_UNCOMPRESSED_DEBUG LWIP_DBG_OFF +#endif + +/** LWIP_RFC7668_LINUX_WORKAROUND_PUBLIC_ADDRESS: + * Currently, the linux kernel driver for 6lowpan sets/clears a bit in + * the address, depending on the BD address (either public or not). + * Might not be RFC7668 conform, so you may select to do that (=1) or + * not (=0) */ +#ifndef LWIP_RFC7668_LINUX_WORKAROUND_PUBLIC_ADDRESS +#define LWIP_RFC7668_LINUX_WORKAROUND_PUBLIC_ADDRESS 1 +#endif + + +#endif /* LWIP_HDR_LOWPAN6_OPTS_H */ diff --git a/lib/lwip/include/netif/ppp/ccp.h b/lib/lwip/include/netif/ppp/ccp.h new file mode 100644 index 0000000000..b2285228b8 --- /dev/null +++ b/lib/lwip/include/netif/ppp/ccp.h @@ -0,0 +1,164 @@ +/* + * ccp.h - Definitions for PPP Compression Control Protocol. + * + * Copyright (c) 1994-2002 Paul Mackerras. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 3. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Paul Mackerras + * paulus@samba.org". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: ccp.h,v 1.12 2004/11/04 10:02:26 paulus Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && CCP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef CCP_H +#define CCP_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * CCP codes. + */ + +#define CCP_CONFREQ 1 +#define CCP_CONFACK 2 +#define CCP_TERMREQ 5 +#define CCP_TERMACK 6 +#define CCP_RESETREQ 14 +#define CCP_RESETACK 15 + +/* + * Max # bytes for a CCP option + */ + +#define CCP_MAX_OPTION_LENGTH 32 + +/* + * Parts of a CCP packet. + */ + +#define CCP_CODE(dp) ((dp)[0]) +#define CCP_ID(dp) ((dp)[1]) +#define CCP_LENGTH(dp) (((dp)[2] << 8) + (dp)[3]) +#define CCP_HDRLEN 4 + +#define CCP_OPT_CODE(dp) ((dp)[0]) +#define CCP_OPT_LENGTH(dp) ((dp)[1]) +#define CCP_OPT_MINLEN 2 + +#if BSDCOMPRESS_SUPPORT +/* + * Definitions for BSD-Compress. + */ + +#define CI_BSD_COMPRESS 21 /* config. option for BSD-Compress */ +#define CILEN_BSD_COMPRESS 3 /* length of config. option */ + +/* Macros for handling the 3rd byte of the BSD-Compress config option. */ +#define BSD_NBITS(x) ((x) & 0x1F) /* number of bits requested */ +#define BSD_VERSION(x) ((x) >> 5) /* version of option format */ +#define BSD_CURRENT_VERSION 1 /* current version number */ +#define BSD_MAKE_OPT(v, n) (((v) << 5) | (n)) + +#define BSD_MIN_BITS 9 /* smallest code size supported */ +#define BSD_MAX_BITS 15 /* largest code size supported */ +#endif /* BSDCOMPRESS_SUPPORT */ + +#if DEFLATE_SUPPORT +/* + * Definitions for Deflate. + */ + +#define CI_DEFLATE 26 /* config option for Deflate */ +#define CI_DEFLATE_DRAFT 24 /* value used in original draft RFC */ +#define CILEN_DEFLATE 4 /* length of its config option */ + +#define DEFLATE_MIN_SIZE 9 +#define DEFLATE_MAX_SIZE 15 +#define DEFLATE_METHOD_VAL 8 +#define DEFLATE_SIZE(x) (((x) >> 4) + 8) +#define DEFLATE_METHOD(x) ((x) & 0x0F) +#define DEFLATE_MAKE_OPT(w) ((((w) - 8) << 4) + DEFLATE_METHOD_VAL) +#define DEFLATE_CHK_SEQUENCE 0 +#endif /* DEFLATE_SUPPORT */ + +#if MPPE_SUPPORT +/* + * Definitions for MPPE. + */ + +#define CI_MPPE 18 /* config option for MPPE */ +#define CILEN_MPPE 6 /* length of config option */ +#endif /* MPPE_SUPPORT */ + +#if PREDICTOR_SUPPORT +/* + * Definitions for other, as yet unsupported, compression methods. + */ + +#define CI_PREDICTOR_1 1 /* config option for Predictor-1 */ +#define CILEN_PREDICTOR_1 2 /* length of its config option */ +#define CI_PREDICTOR_2 2 /* config option for Predictor-2 */ +#define CILEN_PREDICTOR_2 2 /* length of its config option */ +#endif /* PREDICTOR_SUPPORT */ + +typedef struct ccp_options { +#if DEFLATE_SUPPORT + unsigned int deflate :1; /* do Deflate? */ + unsigned int deflate_correct :1; /* use correct code for deflate? */ + unsigned int deflate_draft :1; /* use draft RFC code for deflate? */ +#endif /* DEFLATE_SUPPORT */ +#if BSDCOMPRESS_SUPPORT + unsigned int bsd_compress :1; /* do BSD Compress? */ +#endif /* BSDCOMPRESS_SUPPORT */ +#if PREDICTOR_SUPPORT + unsigned int predictor_1 :1; /* do Predictor-1? */ + unsigned int predictor_2 :1; /* do Predictor-2? */ +#endif /* PREDICTOR_SUPPORT */ + +#if MPPE_SUPPORT + u8_t mppe; /* MPPE bitfield */ +#endif /* MPPE_SUPPORT */ +#if BSDCOMPRESS_SUPPORT + u_short bsd_bits; /* # bits/code for BSD Compress */ +#endif /* BSDCOMPRESS_SUPPORT */ +#if DEFLATE_SUPPORT + u_short deflate_size; /* lg(window size) for Deflate */ +#endif /* DEFLATE_SUPPORT */ + u8_t method; /* code for chosen compression method */ +} ccp_options; + +extern const struct protent ccp_protent; + +void ccp_resetrequest(ppp_pcb *pcb); /* Issue a reset-request. */ + +#ifdef __cplusplus +} +#endif + +#endif /* CCP_H */ +#endif /* PPP_SUPPORT && CCP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/chap-md5.h b/lib/lwip/include/netif/ppp/chap-md5.h new file mode 100644 index 0000000000..eb0269fe50 --- /dev/null +++ b/lib/lwip/include/netif/ppp/chap-md5.h @@ -0,0 +1,36 @@ +/* + * chap-md5.h - New CHAP/MD5 implementation. + * + * Copyright (c) 2003 Paul Mackerras. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 3. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Paul Mackerras + * paulus@samba.org". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && CHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +extern const struct chap_digest_type md5_digest; + +#endif /* PPP_SUPPORT && CHAP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/chap-new.h b/lib/lwip/include/netif/ppp/chap-new.h new file mode 100644 index 0000000000..2d8cd9ca99 --- /dev/null +++ b/lib/lwip/include/netif/ppp/chap-new.h @@ -0,0 +1,200 @@ +/* + * chap-new.c - New CHAP implementation. + * + * Copyright (c) 2003 Paul Mackerras. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 3. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Paul Mackerras + * paulus@samba.org". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && CHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef CHAP_H +#define CHAP_H + +#include "ppp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * CHAP packets begin with a standard header with code, id, len (2 bytes). + */ +#define CHAP_HDRLEN 4 + +/* + * Values for the code field. + */ +#define CHAP_CHALLENGE 1 +#define CHAP_RESPONSE 2 +#define CHAP_SUCCESS 3 +#define CHAP_FAILURE 4 + +/* + * CHAP digest codes. + */ +#define CHAP_MD5 5 +#if MSCHAP_SUPPORT +#define CHAP_MICROSOFT 0x80 +#define CHAP_MICROSOFT_V2 0x81 +#endif /* MSCHAP_SUPPORT */ + +/* + * Semi-arbitrary limits on challenge and response fields. + */ +#define MAX_CHALLENGE_LEN 64 +#define MAX_RESPONSE_LEN 64 + +/* + * These limits apply to challenge and response packets we send. + * The +4 is the +1 that we actually need rounded up. + */ +#define CHAL_MAX_PKTLEN (PPP_HDRLEN + CHAP_HDRLEN + 4 + MAX_CHALLENGE_LEN + MAXNAMELEN) +#define RESP_MAX_PKTLEN (PPP_HDRLEN + CHAP_HDRLEN + 4 + MAX_RESPONSE_LEN + MAXNAMELEN) + +/* bitmask of supported algorithms */ +#if MSCHAP_SUPPORT +#define MDTYPE_MICROSOFT_V2 0x1 +#define MDTYPE_MICROSOFT 0x2 +#endif /* MSCHAP_SUPPORT */ +#define MDTYPE_MD5 0x4 +#define MDTYPE_NONE 0 + +#if MSCHAP_SUPPORT +/* Return the digest alg. ID for the most preferred digest type. */ +#define CHAP_DIGEST(mdtype) \ + ((mdtype) & MDTYPE_MD5)? CHAP_MD5: \ + ((mdtype) & MDTYPE_MICROSOFT_V2)? CHAP_MICROSOFT_V2: \ + ((mdtype) & MDTYPE_MICROSOFT)? CHAP_MICROSOFT: \ + 0 +#else /* !MSCHAP_SUPPORT */ +#define CHAP_DIGEST(mdtype) \ + ((mdtype) & MDTYPE_MD5)? CHAP_MD5: \ + 0 +#endif /* MSCHAP_SUPPORT */ + +/* Return the bit flag (lsb set) for our most preferred digest type. */ +#define CHAP_MDTYPE(mdtype) ((mdtype) ^ ((mdtype) - 1)) & (mdtype) + +/* Return the bit flag for a given digest algorithm ID. */ +#if MSCHAP_SUPPORT +#define CHAP_MDTYPE_D(digest) \ + ((digest) == CHAP_MICROSOFT_V2)? MDTYPE_MICROSOFT_V2: \ + ((digest) == CHAP_MICROSOFT)? MDTYPE_MICROSOFT: \ + ((digest) == CHAP_MD5)? MDTYPE_MD5: \ + 0 +#else /* !MSCHAP_SUPPORT */ +#define CHAP_MDTYPE_D(digest) \ + ((digest) == CHAP_MD5)? MDTYPE_MD5: \ + 0 +#endif /* MSCHAP_SUPPORT */ + +/* Can we do the requested digest? */ +#if MSCHAP_SUPPORT +#define CHAP_CANDIGEST(mdtype, digest) \ + ((digest) == CHAP_MICROSOFT_V2)? (mdtype) & MDTYPE_MICROSOFT_V2: \ + ((digest) == CHAP_MICROSOFT)? (mdtype) & MDTYPE_MICROSOFT: \ + ((digest) == CHAP_MD5)? (mdtype) & MDTYPE_MD5: \ + 0 +#else /* !MSCHAP_SUPPORT */ +#define CHAP_CANDIGEST(mdtype, digest) \ + ((digest) == CHAP_MD5)? (mdtype) & MDTYPE_MD5: \ + 0 +#endif /* MSCHAP_SUPPORT */ + +/* + * The code for each digest type has to supply one of these. + */ +struct chap_digest_type { + int code; + +#if PPP_SERVER + /* + * Note: challenge and response arguments below are formatted as + * a length byte followed by the actual challenge/response data. + */ + void (*generate_challenge)(ppp_pcb *pcb, unsigned char *challenge); + int (*verify_response)(ppp_pcb *pcb, int id, const char *name, + const unsigned char *secret, int secret_len, + const unsigned char *challenge, const unsigned char *response, + char *message, int message_space); +#endif /* PPP_SERVER */ + void (*make_response)(ppp_pcb *pcb, unsigned char *response, int id, const char *our_name, + const unsigned char *challenge, const char *secret, int secret_len, + unsigned char *priv); + int (*check_success)(ppp_pcb *pcb, unsigned char *pkt, int len, unsigned char *priv); + void (*handle_failure)(ppp_pcb *pcb, unsigned char *pkt, int len); +}; + +/* + * Each interface is described by chap structure. + */ +#if CHAP_SUPPORT +typedef struct chap_client_state { + u8_t flags; + const char *name; + const struct chap_digest_type *digest; + unsigned char priv[64]; /* private area for digest's use */ +} chap_client_state; + +#if PPP_SERVER +typedef struct chap_server_state { + u8_t flags; + u8_t id; + const char *name; + const struct chap_digest_type *digest; + int challenge_xmits; + int challenge_pktlen; + unsigned char challenge[CHAL_MAX_PKTLEN]; +} chap_server_state; +#endif /* PPP_SERVER */ +#endif /* CHAP_SUPPORT */ + +#if 0 /* UNUSED */ +/* Hook for a plugin to validate CHAP challenge */ +extern int (*chap_verify_hook)(char *name, char *ourname, int id, + const struct chap_digest_type *digest, + unsigned char *challenge, unsigned char *response, + char *message, int message_space); +#endif /* UNUSED */ + +#if PPP_SERVER +/* Called by authentication code to start authenticating the peer. */ +extern void chap_auth_peer(ppp_pcb *pcb, const char *our_name, int digest_code); +#endif /* PPP_SERVER */ + +/* Called by auth. code to start authenticating us to the peer. */ +extern void chap_auth_with_peer(ppp_pcb *pcb, const char *our_name, int digest_code); + +/* Represents the CHAP protocol to the main pppd code */ +extern const struct protent chap_protent; + +#ifdef __cplusplus +} +#endif + +#endif /* CHAP_H */ +#endif /* PPP_SUPPORT && CHAP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/chap_ms.h b/lib/lwip/include/netif/ppp/chap_ms.h new file mode 100644 index 0000000000..0795291158 --- /dev/null +++ b/lib/lwip/include/netif/ppp/chap_ms.h @@ -0,0 +1,44 @@ +/* + * chap_ms.h - Challenge Handshake Authentication Protocol definitions. + * + * Copyright (c) 1995 Eric Rosenquist. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: chap_ms.h,v 1.13 2004/11/15 22:13:26 paulus Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && MSCHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef CHAPMS_INCLUDE +#define CHAPMS_INCLUDE + +extern const struct chap_digest_type chapms_digest; +extern const struct chap_digest_type chapms2_digest; + +#endif /* CHAPMS_INCLUDE */ + +#endif /* PPP_SUPPORT && MSCHAP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/eap.h b/lib/lwip/include/netif/ppp/eap.h new file mode 100644 index 0000000000..32434ed582 --- /dev/null +++ b/lib/lwip/include/netif/ppp/eap.h @@ -0,0 +1,169 @@ +/* + * eap.h - Extensible Authentication Protocol for PPP (RFC 2284) + * + * Copyright (c) 2001 by Sun Microsystems, Inc. + * All rights reserved. + * + * Non-exclusive rights to redistribute, modify, translate, and use + * this software in source and binary forms, in whole or in part, is + * hereby granted, provided that the above copyright notice is + * duplicated in any source form, and that neither the name of the + * copyright holder nor the author is used to endorse or promote + * products derived from this software. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Original version by James Carlson + * + * $Id: eap.h,v 1.2 2003/06/11 23:56:26 paulus Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && EAP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef PPP_EAP_H +#define PPP_EAP_H + +#include "ppp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Packet header = Code, id, length. + */ +#define EAP_HEADERLEN 4 + + +/* EAP message codes. */ +#define EAP_REQUEST 1 +#define EAP_RESPONSE 2 +#define EAP_SUCCESS 3 +#define EAP_FAILURE 4 + +/* EAP types */ +#define EAPT_IDENTITY 1 +#define EAPT_NOTIFICATION 2 +#define EAPT_NAK 3 /* (response only) */ +#define EAPT_MD5CHAP 4 +#define EAPT_OTP 5 /* One-Time Password; RFC 1938 */ +#define EAPT_TOKEN 6 /* Generic Token Card */ +/* 7 and 8 are unassigned. */ +#define EAPT_RSA 9 /* RSA Public Key Authentication */ +#define EAPT_DSS 10 /* DSS Unilateral */ +#define EAPT_KEA 11 /* KEA */ +#define EAPT_KEA_VALIDATE 12 /* KEA-VALIDATE */ +#define EAPT_TLS 13 /* EAP-TLS */ +#define EAPT_DEFENDER 14 /* Defender Token (AXENT) */ +#define EAPT_W2K 15 /* Windows 2000 EAP */ +#define EAPT_ARCOT 16 /* Arcot Systems */ +#define EAPT_CISCOWIRELESS 17 /* Cisco Wireless */ +#define EAPT_NOKIACARD 18 /* Nokia IP smart card */ +#define EAPT_SRP 19 /* Secure Remote Password */ +/* 20 is deprecated */ + +/* EAP SRP-SHA1 Subtypes */ +#define EAPSRP_CHALLENGE 1 /* Request 1 - Challenge */ +#define EAPSRP_CKEY 1 /* Response 1 - Client Key */ +#define EAPSRP_SKEY 2 /* Request 2 - Server Key */ +#define EAPSRP_CVALIDATOR 2 /* Response 2 - Client Validator */ +#define EAPSRP_SVALIDATOR 3 /* Request 3 - Server Validator */ +#define EAPSRP_ACK 3 /* Response 3 - final ack */ +#define EAPSRP_LWRECHALLENGE 4 /* Req/resp 4 - Lightweight rechal */ + +#define SRPVAL_EBIT 0x00000001 /* Use shared key for ECP */ + +#define SRP_PSEUDO_ID "pseudo_" +#define SRP_PSEUDO_LEN 7 + +#define MD5_SIGNATURE_SIZE 16 +#define EAP_MIN_CHALLENGE_LENGTH 17 +#define EAP_MAX_CHALLENGE_LENGTH 24 +#define EAP_MIN_MAX_POWER_OF_TWO_CHALLENGE_LENGTH 3 /* 2^3-1 = 7, 17+7 = 24 */ + +#define EAP_STATES \ + "Initial", "Pending", "Closed", "Listen", "Identify", \ + "SRP1", "SRP2", "SRP3", "MD5Chall", "Open", "SRP4", "BadAuth" + +#define eap_client_active(pcb) ((pcb)->eap.es_client.ea_state == eapListen) +#if PPP_SERVER +#define eap_server_active(pcb) \ + ((pcb)->eap.es_server.ea_state >= eapIdentify && \ + (pcb)->eap.es_server.ea_state <= eapMD5Chall) +#endif /* PPP_SERVER */ + +/* + * Complete EAP state for one PPP session. + */ +enum eap_state_code { + eapInitial = 0, /* No EAP authentication yet requested */ + eapPending, /* Waiting for LCP (no timer) */ + eapClosed, /* Authentication not in use */ + eapListen, /* Client ready (and timer running) */ + eapIdentify, /* EAP Identify sent */ + eapSRP1, /* Sent EAP SRP-SHA1 Subtype 1 */ + eapSRP2, /* Sent EAP SRP-SHA1 Subtype 2 */ + eapSRP3, /* Sent EAP SRP-SHA1 Subtype 3 */ + eapMD5Chall, /* Sent MD5-Challenge */ + eapOpen, /* Completed authentication */ + eapSRP4, /* Sent EAP SRP-SHA1 Subtype 4 */ + eapBadAuth /* Failed authentication */ +}; + +struct eap_auth { + const char *ea_name; /* Our name */ + char ea_peer[MAXNAMELEN +1]; /* Peer's name */ + void *ea_session; /* Authentication library linkage */ + u_char *ea_skey; /* Shared encryption key */ + u_short ea_namelen; /* Length of our name */ + u_short ea_peerlen; /* Length of peer's name */ + enum eap_state_code ea_state; + u_char ea_id; /* Current id */ + u_char ea_requests; /* Number of Requests sent/received */ + u_char ea_responses; /* Number of Responses */ + u_char ea_type; /* One of EAPT_* */ + u32_t ea_keyflags; /* SRP shared key usage flags */ +}; + +#ifndef EAP_MAX_CHALLENGE_LENGTH +#define EAP_MAX_CHALLENGE_LENGTH 24 +#endif +typedef struct eap_state { + struct eap_auth es_client; /* Client (authenticatee) data */ +#if PPP_SERVER + struct eap_auth es_server; /* Server (authenticator) data */ +#endif /* PPP_SERVER */ + int es_savedtime; /* Saved timeout */ + int es_rechallenge; /* EAP rechallenge interval */ + int es_lwrechallenge; /* SRP lightweight rechallenge inter */ + u8_t es_usepseudo; /* Use SRP Pseudonym if offered one */ + int es_usedpseudo; /* Set if we already sent PN */ + int es_challen; /* Length of challenge string */ + u_char es_challenge[EAP_MAX_CHALLENGE_LENGTH]; +} eap_state; + +/* + * Timeouts. + */ +#if 0 /* moved to ppp_opts.h */ +#define EAP_DEFTIMEOUT 3 /* Timeout (seconds) for rexmit */ +#define EAP_DEFTRANSMITS 10 /* max # times to transmit */ +#define EAP_DEFREQTIME 20 /* Time to wait for peer request */ +#define EAP_DEFALLOWREQ 20 /* max # times to accept requests */ +#endif /* moved to ppp_opts.h */ + +void eap_authwithpeer(ppp_pcb *pcb, const char *localname); +void eap_authpeer(ppp_pcb *pcb, const char *localname); + +extern const struct protent eap_protent; + +#ifdef __cplusplus +} +#endif + +#endif /* PPP_EAP_H */ + +#endif /* PPP_SUPPORT && EAP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/ecp.h b/lib/lwip/include/netif/ppp/ecp.h new file mode 100644 index 0000000000..d8808c3ab2 --- /dev/null +++ b/lib/lwip/include/netif/ppp/ecp.h @@ -0,0 +1,62 @@ +/* + * ecp.h - Definitions for PPP Encryption Control Protocol. + * + * Copyright (c) 2002 Google, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: ecp.h,v 1.2 2003/01/10 07:12:36 fcusack Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && ECP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef ECP_H +#define ECP_H + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct ecp_options { + bool required; /* Is ECP required? */ + unsigned enctype; /* Encryption type */ +} ecp_options; + +extern fsm ecp_fsm[]; +extern ecp_options ecp_wantoptions[]; +extern ecp_options ecp_gotoptions[]; +extern ecp_options ecp_allowoptions[]; +extern ecp_options ecp_hisoptions[]; + +extern const struct protent ecp_protent; + +#ifdef __cplusplus +} +#endif + +#endif /* ECP_H */ +#endif /* PPP_SUPPORT && ECP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/eui64.h b/lib/lwip/include/netif/ppp/eui64.h new file mode 100644 index 0000000000..5adeb482a8 --- /dev/null +++ b/lib/lwip/include/netif/ppp/eui64.h @@ -0,0 +1,102 @@ +/* + * eui64.h - EUI64 routines for IPv6CP. + * + * Copyright (c) 1999 Tommi Komulainen. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Tommi Komulainen + * Tommi.Komulainen@iki.fi". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: eui64.h,v 1.6 2002/12/04 23:03:32 paulus Exp $ +*/ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && PPP_IPV6_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef EUI64_H +#define EUI64_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * @todo: + * + * Maybe this should be done by processing struct in6_addr directly... + */ +typedef union +{ + u8_t e8[8]; + u16_t e16[4]; + u32_t e32[2]; +} eui64_t; + +#define eui64_iszero(e) (((e).e32[0] | (e).e32[1]) == 0) +#define eui64_equals(e, o) (((e).e32[0] == (o).e32[0]) && \ + ((e).e32[1] == (o).e32[1])) +#define eui64_zero(e) (e).e32[0] = (e).e32[1] = 0; + +#define eui64_copy(s, d) memcpy(&(d), &(s), sizeof(eui64_t)) + +#define eui64_magic(e) do { \ + (e).e32[0] = magic(); \ + (e).e32[1] = magic(); \ + (e).e8[0] &= ~2; \ + } while (0) +#define eui64_magic_nz(x) do { \ + eui64_magic(x); \ + } while (eui64_iszero(x)) +#define eui64_magic_ne(x, y) do { \ + eui64_magic(x); \ + } while (eui64_equals(x, y)) + +#define eui64_get(ll, cp) do { \ + eui64_copy((*cp), (ll)); \ + (cp) += sizeof(eui64_t); \ + } while (0) + +#define eui64_put(ll, cp) do { \ + eui64_copy((ll), (*cp)); \ + (cp) += sizeof(eui64_t); \ + } while (0) + +#define eui64_set32(e, l) do { \ + (e).e32[0] = 0; \ + (e).e32[1] = lwip_htonl(l); \ + } while (0) +#define eui64_setlo32(e, l) eui64_set32(e, l) + +char *eui64_ntoa(eui64_t); /* Returns ascii representation of id */ + +#ifdef __cplusplus +} +#endif + +#endif /* EUI64_H */ +#endif /* PPP_SUPPORT && PPP_IPV6_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/fsm.h b/lib/lwip/include/netif/ppp/fsm.h new file mode 100644 index 0000000000..8dec700e07 --- /dev/null +++ b/lib/lwip/include/netif/ppp/fsm.h @@ -0,0 +1,182 @@ +/* + * fsm.h - {Link, IP} Control Protocol Finite State Machine definitions. + * + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: fsm.h,v 1.10 2004/11/13 02:28:15 paulus Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef FSM_H +#define FSM_H + +#include "ppp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Packet header = Code, id, length. + */ +#define HEADERLEN 4 + + +/* + * CP (LCP, IPCP, etc.) codes. + */ +#define CONFREQ 1 /* Configuration Request */ +#define CONFACK 2 /* Configuration Ack */ +#define CONFNAK 3 /* Configuration Nak */ +#define CONFREJ 4 /* Configuration Reject */ +#define TERMREQ 5 /* Termination Request */ +#define TERMACK 6 /* Termination Ack */ +#define CODEREJ 7 /* Code Reject */ + + +/* + * Each FSM is described by an fsm structure and fsm callbacks. + */ +typedef struct fsm { + ppp_pcb *pcb; /* PPP Interface */ + const struct fsm_callbacks *callbacks; /* Callback routines */ + const char *term_reason; /* Reason for closing protocol */ + u8_t seen_ack; /* Have received valid Ack/Nak/Rej to Req */ + /* -- This is our only flag, we might use u_int :1 if we have more flags */ + u16_t protocol; /* Data Link Layer Protocol field value */ + u8_t state; /* State */ + u8_t flags; /* Contains option bits */ + u8_t id; /* Current id */ + u8_t reqid; /* Current request id */ + u8_t retransmits; /* Number of retransmissions left */ + u8_t nakloops; /* Number of nak loops since last ack */ + u8_t rnakloops; /* Number of naks received */ + u8_t maxnakloops; /* Maximum number of nak loops tolerated + (necessary because IPCP require a custom large max nak loops value) */ + u8_t term_reason_len; /* Length of term_reason */ +} fsm; + + +typedef struct fsm_callbacks { + void (*resetci) /* Reset our Configuration Information */ + (fsm *); + int (*cilen) /* Length of our Configuration Information */ + (fsm *); + void (*addci) /* Add our Configuration Information */ + (fsm *, u_char *, int *); + int (*ackci) /* ACK our Configuration Information */ + (fsm *, u_char *, int); + int (*nakci) /* NAK our Configuration Information */ + (fsm *, u_char *, int, int); + int (*rejci) /* Reject our Configuration Information */ + (fsm *, u_char *, int); + int (*reqci) /* Request peer's Configuration Information */ + (fsm *, u_char *, int *, int); + void (*up) /* Called when fsm reaches PPP_FSM_OPENED state */ + (fsm *); + void (*down) /* Called when fsm leaves PPP_FSM_OPENED state */ + (fsm *); + void (*starting) /* Called when we want the lower layer */ + (fsm *); + void (*finished) /* Called when we don't want the lower layer */ + (fsm *); + void (*protreject) /* Called when Protocol-Reject received */ + (int); + void (*retransmit) /* Retransmission is necessary */ + (fsm *); + int (*extcode) /* Called when unknown code received */ + (fsm *, int, int, u_char *, int); + const char *proto_name; /* String name for protocol (for messages) */ +} fsm_callbacks; + + +/* + * Link states. + */ +#define PPP_FSM_INITIAL 0 /* Down, hasn't been opened */ +#define PPP_FSM_STARTING 1 /* Down, been opened */ +#define PPP_FSM_CLOSED 2 /* Up, hasn't been opened */ +#define PPP_FSM_STOPPED 3 /* Open, waiting for down event */ +#define PPP_FSM_CLOSING 4 /* Terminating the connection, not open */ +#define PPP_FSM_STOPPING 5 /* Terminating, but open */ +#define PPP_FSM_REQSENT 6 /* We've sent a Config Request */ +#define PPP_FSM_ACKRCVD 7 /* We've received a Config Ack */ +#define PPP_FSM_ACKSENT 8 /* We've sent a Config Ack */ +#define PPP_FSM_OPENED 9 /* Connection available */ + + +/* + * Flags - indicate options controlling FSM operation + */ +#define OPT_PASSIVE 1 /* Don't die if we don't get a response */ +#define OPT_RESTART 2 /* Treat 2nd OPEN as DOWN, UP */ +#define OPT_SILENT 4 /* Wait for peer to speak first */ + + +/* + * Timeouts. + */ +#if 0 /* moved to ppp_opts.h */ +#define DEFTIMEOUT 3 /* Timeout time in seconds */ +#define DEFMAXTERMREQS 2 /* Maximum Terminate-Request transmissions */ +#define DEFMAXCONFREQS 10 /* Maximum Configure-Request transmissions */ +#define DEFMAXNAKLOOPS 5 /* Maximum number of nak loops */ +#endif /* moved to ppp_opts.h */ + + +/* + * Prototypes + */ +void fsm_init(fsm *f); +void fsm_lowerup(fsm *f); +void fsm_lowerdown(fsm *f); +void fsm_open(fsm *f); +void fsm_close(fsm *f, const char *reason); +void fsm_input(fsm *f, u_char *inpacket, int l); +void fsm_protreject(fsm *f); +void fsm_sdata(fsm *f, u_char code, u_char id, const u_char *data, int datalen); + +#ifdef __cplusplus +} +#endif + +#endif /* FSM_H */ +#endif /* PPP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/ipcp.h b/lib/lwip/include/netif/ppp/ipcp.h new file mode 100644 index 0000000000..32fdd1c641 --- /dev/null +++ b/lib/lwip/include/netif/ppp/ipcp.h @@ -0,0 +1,134 @@ +/* + * ipcp.h - IP Control Protocol definitions. + * + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: ipcp.h,v 1.14 2002/12/04 23:03:32 paulus Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && PPP_IPV4_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef IPCP_H +#define IPCP_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Options. + */ +#define CI_ADDRS 1 /* IP Addresses */ +#if VJ_SUPPORT +#define CI_COMPRESSTYPE 2 /* Compression Type */ +#endif /* VJ_SUPPORT */ +#define CI_ADDR 3 + +#if LWIP_DNS +#define CI_MS_DNS1 129 /* Primary DNS value */ +#define CI_MS_DNS2 131 /* Secondary DNS value */ +#endif /* LWIP_DNS */ +#if 0 /* UNUSED - WINS */ +#define CI_MS_WINS1 130 /* Primary WINS value */ +#define CI_MS_WINS2 132 /* Secondary WINS value */ +#endif /* UNUSED - WINS */ + +#if VJ_SUPPORT +#define MAX_STATES 16 /* from slcompress.h */ + +#define IPCP_VJMODE_OLD 1 /* "old" mode (option # = 0x0037) */ +#define IPCP_VJMODE_RFC1172 2 /* "old-rfc"mode (option # = 0x002d) */ +#define IPCP_VJMODE_RFC1332 3 /* "new-rfc"mode (option # = 0x002d, */ + /* maxslot and slot number compression) */ + +#define IPCP_VJ_COMP 0x002d /* current value for VJ compression option*/ +#define IPCP_VJ_COMP_OLD 0x0037 /* "old" (i.e, broken) value for VJ */ + /* compression option*/ +#endif /* VJ_SUPPORT */ + +typedef struct ipcp_options { + unsigned int neg_addr :1; /* Negotiate IP Address? */ + unsigned int old_addrs :1; /* Use old (IP-Addresses) option? */ + unsigned int req_addr :1; /* Ask peer to send IP address? */ +#if 0 /* UNUSED */ + unsigned int default_route :1; /* Assign default route through interface? */ + unsigned int replace_default_route :1; /* Replace default route through interface? */ +#endif /* UNUSED */ +#if 0 /* UNUSED - PROXY ARP */ + unsigned int proxy_arp :1; /* Make proxy ARP entry for peer? */ +#endif /* UNUSED - PROXY ARP */ +#if VJ_SUPPORT + unsigned int neg_vj :1; /* Van Jacobson Compression? */ + unsigned int old_vj :1; /* use old (short) form of VJ option? */ + unsigned int cflag :1; +#endif /* VJ_SUPPORT */ + unsigned int accept_local :1; /* accept peer's value for ouraddr */ + unsigned int accept_remote :1; /* accept peer's value for hisaddr */ +#if LWIP_DNS + unsigned int req_dns1 :1; /* Ask peer to send primary DNS address? */ + unsigned int req_dns2 :1; /* Ask peer to send secondary DNS address? */ +#endif /* LWIP_DNS */ + + u32_t ouraddr, hisaddr; /* Addresses in NETWORK BYTE ORDER */ +#if LWIP_DNS + u32_t dnsaddr[2]; /* Primary and secondary MS DNS entries */ +#endif /* LWIP_DNS */ +#if 0 /* UNUSED - WINS */ + u32_t winsaddr[2]; /* Primary and secondary MS WINS entries */ +#endif /* UNUSED - WINS */ + +#if VJ_SUPPORT + u16_t vj_protocol; /* protocol value to use in VJ option */ + u8_t maxslotindex; /* values for RFC1332 VJ compression neg. */ +#endif /* VJ_SUPPORT */ +} ipcp_options; + +#if 0 /* UNUSED, already defined by lwIP */ +char *ip_ntoa (u32_t); +#endif /* UNUSED, already defined by lwIP */ + +extern const struct protent ipcp_protent; + +#ifdef __cplusplus +} +#endif + +#endif /* IPCP_H */ +#endif /* PPP_SUPPORT && PPP_IPV4_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/ipv6cp.h b/lib/lwip/include/netif/ppp/ipv6cp.h new file mode 100644 index 0000000000..9099973869 --- /dev/null +++ b/lib/lwip/include/netif/ppp/ipv6cp.h @@ -0,0 +1,191 @@ +/* + * ipv6cp.h - PPP IPV6 Control Protocol. + * + * Copyright (c) 1999 Tommi Komulainen. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Tommi Komulainen + * Tommi.Komulainen@iki.fi". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +/* Original version, based on RFC2023 : + + Copyright (c) 1995, 1996, 1997 Francis.Dupont@inria.fr, INRIA Rocquencourt, + Alain.Durand@imag.fr, IMAG, + Jean-Luc.Richier@imag.fr, IMAG-LSR. + + Copyright (c) 1998, 1999 Francis.Dupont@inria.fr, GIE DYADE, + Alain.Durand@imag.fr, IMAG, + Jean-Luc.Richier@imag.fr, IMAG-LSR. + + Ce travail a été fait au sein du GIE DYADE (Groupement d'Intérêt + Économique ayant pour membres BULL S.A. et l'INRIA). + + Ce logiciel informatique est disponible aux conditions + usuelles dans la recherche, c'est-à-dire qu'il peut + être utilisé, copié, modifié, distribué à l'unique + condition que ce texte soit conservé afin que + l'origine de ce logiciel soit reconnue. + + Le nom de l'Institut National de Recherche en Informatique + et en Automatique (INRIA), de l'IMAG, ou d'une personne morale + ou physique ayant participé à l'élaboration de ce logiciel ne peut + être utilisé sans son accord préalable explicite. + + Ce logiciel est fourni tel quel sans aucune garantie, + support ou responsabilité d'aucune sorte. + Ce logiciel est dérivé de sources d'origine + "University of California at Berkeley" et + "Digital Equipment Corporation" couvertes par des copyrights. + + L'Institut d'Informatique et de Mathématiques Appliquées de Grenoble (IMAG) + est une fédération d'unités mixtes de recherche du CNRS, de l'Institut National + Polytechnique de Grenoble et de l'Université Joseph Fourier regroupant + sept laboratoires dont le laboratoire Logiciels, Systèmes, Réseaux (LSR). + + This work has been done in the context of GIE DYADE (joint R & D venture + between BULL S.A. and INRIA). + + This software is available with usual "research" terms + with the aim of retain credits of the software. + Permission to use, copy, modify and distribute this software for any + purpose and without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies, + and the name of INRIA, IMAG, or any contributor not be used in advertising + or publicity pertaining to this material without the prior explicit + permission. The software is provided "as is" without any + warranties, support or liabilities of any kind. + This software is derived from source code from + "University of California at Berkeley" and + "Digital Equipment Corporation" protected by copyrights. + + Grenoble's Institute of Computer Science and Applied Mathematics (IMAG) + is a federation of seven research units funded by the CNRS, National + Polytechnic Institute of Grenoble and University Joseph Fourier. + The research unit in Software, Systems, Networks (LSR) is member of IMAG. +*/ + +/* + * Derived from : + * + * + * ipcp.h - IP Control Protocol definitions. + * + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: ipv6cp.h,v 1.7 2002/12/04 23:03:32 paulus Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && PPP_IPV6_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef IPV6CP_H +#define IPV6CP_H + +#include "eui64.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Options. + */ +#define CI_IFACEID 1 /* Interface Identifier */ +#ifdef IPV6CP_COMP +#define CI_COMPRESSTYPE 2 /* Compression Type */ +#endif /* IPV6CP_COMP */ + +/* No compression types yet defined. + *#define IPV6CP_COMP 0x004f + */ +typedef struct ipv6cp_options { + unsigned int neg_ifaceid :1; /* Negotiate interface identifier? */ + unsigned int req_ifaceid :1; /* Ask peer to send interface identifier? */ + unsigned int accept_local :1; /* accept peer's value for iface id? */ + unsigned int opt_local :1; /* ourtoken set by option */ + unsigned int opt_remote :1; /* histoken set by option */ + unsigned int use_ip :1; /* use IP as interface identifier */ +#if 0 + unsigned int use_persistent :1; /* use uniquely persistent value for address */ +#endif +#ifdef IPV6CP_COMP + unsigned int neg_vj :1; /* Van Jacobson Compression? */ +#endif /* IPV6CP_COMP */ + +#ifdef IPV6CP_COMP + u_short vj_protocol; /* protocol value to use in VJ option */ +#endif /* IPV6CP_COMP */ + eui64_t ourid, hisid; /* Interface identifiers */ +} ipv6cp_options; + +extern const struct protent ipv6cp_protent; + +#ifdef __cplusplus +} +#endif + +#endif /* IPV6CP_H */ +#endif /* PPP_SUPPORT && PPP_IPV6_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/lcp.h b/lib/lwip/include/netif/ppp/lcp.h new file mode 100644 index 0000000000..18ad1cb23b --- /dev/null +++ b/lib/lwip/include/netif/ppp/lcp.h @@ -0,0 +1,179 @@ +/* + * lcp.h - Link Control Protocol definitions. + * + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: lcp.h,v 1.20 2004/11/14 22:53:42 carlsonj Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef LCP_H +#define LCP_H + +#include "ppp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Options. + */ +#define CI_VENDOR 0 /* Vendor Specific */ +#define CI_MRU 1 /* Maximum Receive Unit */ +#define CI_ASYNCMAP 2 /* Async Control Character Map */ +#define CI_AUTHTYPE 3 /* Authentication Type */ +#define CI_QUALITY 4 /* Quality Protocol */ +#define CI_MAGICNUMBER 5 /* Magic Number */ +#define CI_PCOMPRESSION 7 /* Protocol Field Compression */ +#define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */ +#define CI_FCSALTERN 9 /* FCS-Alternatives */ +#define CI_SDP 10 /* Self-Describing-Pad */ +#define CI_NUMBERED 11 /* Numbered-Mode */ +#define CI_CALLBACK 13 /* callback */ +#define CI_MRRU 17 /* max reconstructed receive unit; multilink */ +#define CI_SSNHF 18 /* short sequence numbers for multilink */ +#define CI_EPDISC 19 /* endpoint discriminator */ +#define CI_MPPLUS 22 /* Multi-Link-Plus-Procedure */ +#define CI_LDISC 23 /* Link-Discriminator */ +#define CI_LCPAUTH 24 /* LCP Authentication */ +#define CI_COBS 25 /* Consistent Overhead Byte Stuffing */ +#define CI_PREFELIS 26 /* Prefix Elision */ +#define CI_MPHDRFMT 27 /* MP Header Format */ +#define CI_I18N 28 /* Internationalization */ +#define CI_SDL 29 /* Simple Data Link */ + +/* + * LCP-specific packet types (code numbers). + */ +#define PROTREJ 8 /* Protocol Reject */ +#define ECHOREQ 9 /* Echo Request */ +#define ECHOREP 10 /* Echo Reply */ +#define DISCREQ 11 /* Discard Request */ +#define IDENTIF 12 /* Identification */ +#define TIMEREM 13 /* Time Remaining */ + +/* Value used as data for CI_CALLBACK option */ +#define CBCP_OPT 6 /* Use callback control protocol */ + +#if 0 /* moved to ppp_opts.h */ +#define DEFMRU 1500 /* Try for this */ +#define MINMRU 128 /* No MRUs below this */ +#define MAXMRU 16384 /* Normally limit MRU to this */ +#endif /* moved to ppp_opts.h */ + +/* An endpoint discriminator, used with multilink. */ +#define MAX_ENDP_LEN 20 /* maximum length of discriminator value */ +struct epdisc { + unsigned char class_; /* -- The word "class" is reserved in C++. */ + unsigned char length; + unsigned char value[MAX_ENDP_LEN]; +}; + +/* + * The state of options is described by an lcp_options structure. + */ +typedef struct lcp_options { + unsigned int passive :1; /* Don't die if we don't get a response */ + unsigned int silent :1; /* Wait for the other end to start first */ +#if 0 /* UNUSED */ + unsigned int restart :1; /* Restart vs. exit after close */ +#endif /* UNUSED */ + unsigned int neg_mru :1; /* Negotiate the MRU? */ + unsigned int neg_asyncmap :1; /* Negotiate the async map? */ +#if PAP_SUPPORT + unsigned int neg_upap :1; /* Ask for UPAP authentication? */ +#endif /* PAP_SUPPORT */ +#if CHAP_SUPPORT + unsigned int neg_chap :1; /* Ask for CHAP authentication? */ +#endif /* CHAP_SUPPORT */ +#if EAP_SUPPORT + unsigned int neg_eap :1; /* Ask for EAP authentication? */ +#endif /* EAP_SUPPORT */ + unsigned int neg_magicnumber :1; /* Ask for magic number? */ + unsigned int neg_pcompression :1; /* HDLC Protocol Field Compression? */ + unsigned int neg_accompression :1; /* HDLC Address/Control Field Compression? */ +#if LQR_SUPPORT + unsigned int neg_lqr :1; /* Negotiate use of Link Quality Reports */ +#endif /* LQR_SUPPORT */ + unsigned int neg_cbcp :1; /* Negotiate use of CBCP */ +#ifdef HAVE_MULTILINK + unsigned int neg_mrru :1; /* negotiate multilink MRRU */ +#endif /* HAVE_MULTILINK */ + unsigned int neg_ssnhf :1; /* negotiate short sequence numbers */ + unsigned int neg_endpoint :1; /* negotiate endpoint discriminator */ + + u16_t mru; /* Value of MRU */ +#ifdef HAVE_MULTILINK + u16_t mrru; /* Value of MRRU, and multilink enable */ +#endif /* MULTILINK */ +#if CHAP_SUPPORT + u8_t chap_mdtype; /* which MD types (hashing algorithm) */ +#endif /* CHAP_SUPPORT */ + u32_t asyncmap; /* Value of async map */ + u32_t magicnumber; + u8_t numloops; /* Number of loops during magic number neg. */ +#if LQR_SUPPORT + u32_t lqr_period; /* Reporting period for LQR 1/100ths second */ +#endif /* LQR_SUPPORT */ + struct epdisc endpoint; /* endpoint discriminator */ +} lcp_options; + +void lcp_open(ppp_pcb *pcb); +void lcp_close(ppp_pcb *pcb, const char *reason); +void lcp_lowerup(ppp_pcb *pcb); +void lcp_lowerdown(ppp_pcb *pcb); +void lcp_sprotrej(ppp_pcb *pcb, u_char *p, int len); /* send protocol reject */ + +extern const struct protent lcp_protent; + +#if 0 /* moved to ppp_opts.h */ +/* Default number of times we receive our magic number from the peer + before deciding the link is looped-back. */ +#define DEFLOOPBACKFAIL 10 +#endif /* moved to ppp_opts.h */ + +#ifdef __cplusplus +} +#endif + +#endif /* LCP_H */ +#endif /* PPP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/magic.h b/lib/lwip/include/netif/ppp/magic.h new file mode 100644 index 0000000000..12a002cd5c --- /dev/null +++ b/lib/lwip/include/netif/ppp/magic.h @@ -0,0 +1,130 @@ +/* + * magic.h - PPP Magic Number definitions. + * + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: magic.h,v 1.5 2003/06/11 23:56:26 paulus Exp $ + */ +/***************************************************************************** +* randm.h - Random number generator header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* Copyright (c) 1998 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher marc@mbsi.ca +* Ported to lwIP. +* 98-05-29 Guy Lancaster glanca@gesn.com, Global Election Systems Inc. +* Extracted from avos. +*****************************************************************************/ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef MAGIC_H +#define MAGIC_H + +#ifdef __cplusplus +extern "C" { +#endif + +/*********************** +*** PUBLIC FUNCTIONS *** +***********************/ + +/* + * Initialize the random number generator. + */ +void magic_init(void); + +/* + * Randomize our random seed value. To be called for truly random events + * such as user operations and network traffic. + */ +void magic_randomize(void); + +/* + * Return a new random number. + */ +u32_t magic(void); /* Returns the next magic number */ + +/* + * Fill buffer with random bytes + * + * Use the random pool to generate random data. This degrades to pseudo + * random when used faster than randomness is supplied using magic_churnrand(). + * Thus it's important to make sure that the results of this are not + * published directly because one could predict the next result to at + * least some degree. Also, it's important to get a good seed before + * the first use. + */ +void magic_random_bytes(unsigned char *buf, u32_t buf_len); + +/* + * Return a new random number between 0 and (2^pow)-1 included. + */ +u32_t magic_pow(u8_t pow); + +#ifdef __cplusplus +} +#endif + +#endif /* MAGIC_H */ + +#endif /* PPP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/mppe.h b/lib/lwip/include/netif/ppp/mppe.h new file mode 100644 index 0000000000..5de1128479 --- /dev/null +++ b/lib/lwip/include/netif/ppp/mppe.h @@ -0,0 +1,181 @@ +/* + * mppe.h - Definitions for MPPE + * + * Copyright (c) 2008 Paul Mackerras. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Paul Mackerras + * paulus@samba.org". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && MPPE_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef MPPE_H +#define MPPE_H + +#include "netif/ppp/pppcrypt.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define MPPE_PAD 4 /* MPPE growth per frame */ +#define MPPE_MAX_KEY_LEN 16 /* largest key length (128-bit) */ + +/* option bits for ccp_options.mppe */ +#define MPPE_OPT_40 0x01 /* 40 bit */ +#define MPPE_OPT_128 0x02 /* 128 bit */ +#define MPPE_OPT_STATEFUL 0x04 /* stateful mode */ +/* unsupported opts */ +#define MPPE_OPT_56 0x08 /* 56 bit */ +#define MPPE_OPT_MPPC 0x10 /* MPPC compression */ +#define MPPE_OPT_D 0x20 /* Unknown */ +#define MPPE_OPT_UNSUPPORTED (MPPE_OPT_56|MPPE_OPT_MPPC|MPPE_OPT_D) +#define MPPE_OPT_UNKNOWN 0x40 /* Bits !defined in RFC 3078 were set */ + +/* + * This is not nice ... the alternative is a bitfield struct though. + * And unfortunately, we cannot share the same bits for the option + * names above since C and H are the same bit. We could do a u_int32 + * but then we have to do a lwip_htonl() all the time and/or we still need + * to know which octet is which. + */ +#define MPPE_C_BIT 0x01 /* MPPC */ +#define MPPE_D_BIT 0x10 /* Obsolete, usage unknown */ +#define MPPE_L_BIT 0x20 /* 40-bit */ +#define MPPE_S_BIT 0x40 /* 128-bit */ +#define MPPE_M_BIT 0x80 /* 56-bit, not supported */ +#define MPPE_H_BIT 0x01 /* Stateless (in a different byte) */ + +/* Does not include H bit; used for least significant octet only. */ +#define MPPE_ALL_BITS (MPPE_D_BIT|MPPE_L_BIT|MPPE_S_BIT|MPPE_M_BIT|MPPE_H_BIT) + +/* Build a CI from mppe opts (see RFC 3078) */ +#define MPPE_OPTS_TO_CI(opts, ci) \ + do { \ + u_char *ptr = ci; /* u_char[4] */ \ + \ + /* H bit */ \ + if (opts & MPPE_OPT_STATEFUL) \ + *ptr++ = 0x0; \ + else \ + *ptr++ = MPPE_H_BIT; \ + *ptr++ = 0; \ + *ptr++ = 0; \ + \ + /* S,L bits */ \ + *ptr = 0; \ + if (opts & MPPE_OPT_128) \ + *ptr |= MPPE_S_BIT; \ + if (opts & MPPE_OPT_40) \ + *ptr |= MPPE_L_BIT; \ + /* M,D,C bits not supported */ \ + } while (/* CONSTCOND */ 0) + +/* The reverse of the above */ +#define MPPE_CI_TO_OPTS(ci, opts) \ + do { \ + const u_char *ptr = ci; /* u_char[4] */ \ + \ + opts = 0; \ + \ + /* H bit */ \ + if (!(ptr[0] & MPPE_H_BIT)) \ + opts |= MPPE_OPT_STATEFUL; \ + \ + /* S,L bits */ \ + if (ptr[3] & MPPE_S_BIT) \ + opts |= MPPE_OPT_128; \ + if (ptr[3] & MPPE_L_BIT) \ + opts |= MPPE_OPT_40; \ + \ + /* M,D,C bits */ \ + if (ptr[3] & MPPE_M_BIT) \ + opts |= MPPE_OPT_56; \ + if (ptr[3] & MPPE_D_BIT) \ + opts |= MPPE_OPT_D; \ + if (ptr[3] & MPPE_C_BIT) \ + opts |= MPPE_OPT_MPPC; \ + \ + /* Other bits */ \ + if (ptr[0] & ~MPPE_H_BIT) \ + opts |= MPPE_OPT_UNKNOWN; \ + if (ptr[1] || ptr[2]) \ + opts |= MPPE_OPT_UNKNOWN; \ + if (ptr[3] & ~MPPE_ALL_BITS) \ + opts |= MPPE_OPT_UNKNOWN; \ + } while (/* CONSTCOND */ 0) + +/* Shared MPPE padding between MSCHAP and MPPE */ +#define SHA1_PAD_SIZE 40 + +static const u8_t mppe_sha1_pad1[SHA1_PAD_SIZE] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; +static const u8_t mppe_sha1_pad2[SHA1_PAD_SIZE] = { + 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, + 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, + 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, + 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2 +}; + +/* + * State for an MPPE (de)compressor. + */ +typedef struct ppp_mppe_state { + lwip_arc4_context arc4; + u8_t master_key[MPPE_MAX_KEY_LEN]; + u8_t session_key[MPPE_MAX_KEY_LEN]; + u8_t keylen; /* key length in bytes */ + /* NB: 128-bit == 16, 40-bit == 8! + * If we want to support 56-bit, the unit has to change to bits + */ + u8_t bits; /* MPPE control bits */ + u16_t ccount; /* 12-bit coherency count (seqno) */ + u16_t sanity_errors; /* take down LCP if too many */ + unsigned int stateful :1; /* stateful mode flag */ + unsigned int discard :1; /* stateful mode packet loss flag */ +} ppp_mppe_state; + +void mppe_set_key(ppp_pcb *pcb, ppp_mppe_state *state, u8_t *key); +void mppe_init(ppp_pcb *pcb, ppp_mppe_state *state, u8_t options); +void mppe_comp_reset(ppp_pcb *pcb, ppp_mppe_state *state); +err_t mppe_compress(ppp_pcb *pcb, ppp_mppe_state *state, struct pbuf **pb, u16_t protocol); +void mppe_decomp_reset(ppp_pcb *pcb, ppp_mppe_state *state); +err_t mppe_decompress(ppp_pcb *pcb, ppp_mppe_state *state, struct pbuf **pb); + +#ifdef __cplusplus +} +#endif + +#endif /* MPPE_H */ +#endif /* PPP_SUPPORT && MPPE_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/polarssl/arc4.h b/lib/lwip/include/netif/ppp/polarssl/arc4.h new file mode 100644 index 0000000000..4af724cd90 --- /dev/null +++ b/lib/lwip/include/netif/ppp/polarssl/arc4.h @@ -0,0 +1,81 @@ +/** + * \file arc4.h + * + * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine + * + * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the names of PolarSSL or XySSL nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "netif/ppp/ppp_opts.h" +#if LWIP_INCLUDED_POLARSSL_ARC4 + +#ifndef LWIP_INCLUDED_POLARSSL_ARC4_H +#define LWIP_INCLUDED_POLARSSL_ARC4_H + +/** + * \brief ARC4 context structure + */ +typedef struct +{ + int x; /*!< permutation index */ + int y; /*!< permutation index */ + unsigned char m[256]; /*!< permutation table */ +} +arc4_context; + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief ARC4 key schedule + * + * \param ctx ARC4 context to be initialized + * \param key the secret key + * \param keylen length of the key + */ +void arc4_setup( arc4_context *ctx, unsigned char *key, int keylen ); + +/** + * \brief ARC4 cipher function + * + * \param ctx ARC4 context + * \param buf buffer to be processed + * \param buflen amount of data in buf + */ +void arc4_crypt( arc4_context *ctx, unsigned char *buf, int buflen ); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_INCLUDED_POLARSSL_ARC4_H */ + +#endif /* LWIP_INCLUDED_POLARSSL_ARC4 */ diff --git a/lib/lwip/include/netif/ppp/polarssl/des.h b/lib/lwip/include/netif/ppp/polarssl/des.h new file mode 100644 index 0000000000..e893890ed7 --- /dev/null +++ b/lib/lwip/include/netif/ppp/polarssl/des.h @@ -0,0 +1,92 @@ +/** + * \file des.h + * + * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine + * + * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the names of PolarSSL or XySSL nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "netif/ppp/ppp_opts.h" +#if LWIP_INCLUDED_POLARSSL_DES + +#ifndef LWIP_INCLUDED_POLARSSL_DES_H +#define LWIP_INCLUDED_POLARSSL_DES_H + +#define DES_ENCRYPT 1 +#define DES_DECRYPT 0 + +/** + * \brief DES context structure + */ +typedef struct +{ + int mode; /*!< encrypt/decrypt */ + unsigned long sk[32]; /*!< DES subkeys */ +} +des_context; + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief DES key schedule (56-bit, encryption) + * + * \param ctx DES context to be initialized + * \param key 8-byte secret key + */ +void des_setkey_enc( des_context *ctx, unsigned char key[8] ); + +/** + * \brief DES key schedule (56-bit, decryption) + * + * \param ctx DES context to be initialized + * \param key 8-byte secret key + */ +void des_setkey_dec( des_context *ctx, unsigned char key[8] ); + +/** + * \brief DES-ECB block encryption/decryption + * + * \param ctx DES context + * \param input 64-bit input block + * \param output 64-bit output block + */ +void des_crypt_ecb( des_context *ctx, + const unsigned char input[8], + unsigned char output[8] ); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_INCLUDED_POLARSSL_DES_H */ + +#endif /* LWIP_INCLUDED_POLARSSL_DES */ diff --git a/lib/lwip/include/netif/ppp/polarssl/md4.h b/lib/lwip/include/netif/ppp/polarssl/md4.h new file mode 100644 index 0000000000..570445687e --- /dev/null +++ b/lib/lwip/include/netif/ppp/polarssl/md4.h @@ -0,0 +1,97 @@ +/** + * \file md4.h + * + * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine + * + * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the names of PolarSSL or XySSL nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "netif/ppp/ppp_opts.h" +#if LWIP_INCLUDED_POLARSSL_MD4 + +#ifndef LWIP_INCLUDED_POLARSSL_MD4_H +#define LWIP_INCLUDED_POLARSSL_MD4_H + +/** + * \brief MD4 context structure + */ +typedef struct +{ + unsigned long total[2]; /*!< number of bytes processed */ + unsigned long state[4]; /*!< intermediate digest state */ + unsigned char buffer[64]; /*!< data block being processed */ +} +md4_context; + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief MD4 context setup + * + * \param ctx context to be initialized + */ +void md4_starts( md4_context *ctx ); + +/** + * \brief MD4 process buffer + * + * \param ctx MD4 context + * \param input buffer holding the data + * \param ilen length of the input data + */ +void md4_update( md4_context *ctx, const unsigned char *input, int ilen ); + +/** + * \brief MD4 final digest + * + * \param ctx MD4 context + * \param output MD4 checksum result + */ +void md4_finish( md4_context *ctx, unsigned char output[16] ); + +/** + * \brief Output = MD4( input buffer ) + * + * \param input buffer holding the data + * \param ilen length of the input data + * \param output MD4 checksum result + */ +void md4( unsigned char *input, int ilen, unsigned char output[16] ); + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_INCLUDED_POLARSSL_MD4_H */ + +#endif /* LWIP_INCLUDED_POLARSSL_MD4 */ diff --git a/lib/lwip/include/netif/ppp/polarssl/md5.h b/lib/lwip/include/netif/ppp/polarssl/md5.h new file mode 100644 index 0000000000..1244011890 --- /dev/null +++ b/lib/lwip/include/netif/ppp/polarssl/md5.h @@ -0,0 +1,96 @@ +/** + * \file md5.h + * + * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine + * + * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the names of PolarSSL or XySSL nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "netif/ppp/ppp_opts.h" +#if LWIP_INCLUDED_POLARSSL_MD5 + +#ifndef LWIP_INCLUDED_POLARSSL_MD5_H +#define LWIP_INCLUDED_POLARSSL_MD5_H + +/** + * \brief MD5 context structure + */ +typedef struct +{ + unsigned long total[2]; /*!< number of bytes processed */ + unsigned long state[4]; /*!< intermediate digest state */ + unsigned char buffer[64]; /*!< data block being processed */ +} +md5_context; + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief MD5 context setup + * + * \param ctx context to be initialized + */ +void md5_starts( md5_context *ctx ); + +/** + * \brief MD5 process buffer + * + * \param ctx MD5 context + * \param input buffer holding the data + * \param ilen length of the input data + */ +void md5_update( md5_context *ctx, const unsigned char *input, int ilen ); + +/** + * \brief MD5 final digest + * + * \param ctx MD5 context + * \param output MD5 checksum result + */ +void md5_finish( md5_context *ctx, unsigned char output[16] ); + +/** + * \brief Output = MD5( input buffer ) + * + * \param input buffer holding the data + * \param ilen length of the input data + * \param output MD5 checksum result + */ +void md5( unsigned char *input, int ilen, unsigned char output[16] ); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_INCLUDED_POLARSSL_MD5_H */ + +#endif /* LWIP_INCLUDED_POLARSSL_MD5 */ diff --git a/lib/lwip/include/netif/ppp/polarssl/sha1.h b/lib/lwip/include/netif/ppp/polarssl/sha1.h new file mode 100644 index 0000000000..a4c53e07c5 --- /dev/null +++ b/lib/lwip/include/netif/ppp/polarssl/sha1.h @@ -0,0 +1,96 @@ +/** + * \file sha1.h + * + * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine + * + * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the names of PolarSSL or XySSL nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "netif/ppp/ppp_opts.h" +#if LWIP_INCLUDED_POLARSSL_SHA1 + +#ifndef LWIP_INCLUDED_POLARSSL_SHA1_H +#define LWIP_INCLUDED_POLARSSL_SHA1_H + +/** + * \brief SHA-1 context structure + */ +typedef struct +{ + unsigned long total[2]; /*!< number of bytes processed */ + unsigned long state[5]; /*!< intermediate digest state */ + unsigned char buffer[64]; /*!< data block being processed */ +} +sha1_context; + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief SHA-1 context setup + * + * \param ctx context to be initialized + */ +void sha1_starts( sha1_context *ctx ); + +/** + * \brief SHA-1 process buffer + * + * \param ctx SHA-1 context + * \param input buffer holding the data + * \param ilen length of the input data + */ +void sha1_update( sha1_context *ctx, const unsigned char *input, int ilen ); + +/** + * \brief SHA-1 final digest + * + * \param ctx SHA-1 context + * \param output SHA-1 checksum result + */ +void sha1_finish( sha1_context *ctx, unsigned char output[20] ); + +/** + * \brief Output = SHA-1( input buffer ) + * + * \param input buffer holding the data + * \param ilen length of the input data + * \param output SHA-1 checksum result + */ +void sha1( unsigned char *input, int ilen, unsigned char output[20] ); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_INCLUDED_POLARSSL_SHA1_H */ + +#endif /* LWIP_INCLUDED_POLARSSL_SHA1 */ diff --git a/lib/lwip/include/netif/ppp/ppp.h b/lib/lwip/include/netif/ppp/ppp.h new file mode 100644 index 0000000000..f93747fbd0 --- /dev/null +++ b/lib/lwip/include/netif/ppp/ppp.h @@ -0,0 +1,698 @@ +/***************************************************************************** +* ppp.h - Network Point to Point Protocol header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher marc@mbsi.ca +* Ported to lwIP. +* 97-11-05 Guy Lancaster glanca@gesn.com, Global Election Systems Inc. +* Original derived from BSD codes. +*****************************************************************************/ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef PPP_H +#define PPP_H + +#include "lwip/def.h" +#include "lwip/stats.h" +#include "lwip/mem.h" +#include "lwip/netif.h" +#include "lwip/sys.h" +#include "lwip/timeouts.h" +#if PPP_IPV6_SUPPORT +#include "lwip/ip6_addr.h" +#endif /* PPP_IPV6_SUPPORT */ + +#ifdef __cplusplus +extern "C" { +#endif + +/* Disable non-working or rarely used PPP feature, so rarely that we don't want to bloat ppp_opts.h with them */ +#ifndef PPP_OPTIONS +#define PPP_OPTIONS 0 +#endif + +#ifndef PPP_NOTIFY +#define PPP_NOTIFY 0 +#endif + +#ifndef PPP_REMOTENAME +#define PPP_REMOTENAME 0 +#endif + +#ifndef PPP_IDLETIMELIMIT +#define PPP_IDLETIMELIMIT 0 +#endif + +#ifndef PPP_LCP_ADAPTIVE +#define PPP_LCP_ADAPTIVE 0 +#endif + +#ifndef PPP_MAXCONNECT +#define PPP_MAXCONNECT 0 +#endif + +#ifndef PPP_ALLOWED_ADDRS +#define PPP_ALLOWED_ADDRS 0 +#endif + +#ifndef PPP_PROTOCOLNAME +#define PPP_PROTOCOLNAME 0 +#endif + +#ifndef PPP_STATS_SUPPORT +#define PPP_STATS_SUPPORT 0 +#endif + +#ifndef DEFLATE_SUPPORT +#define DEFLATE_SUPPORT 0 +#endif + +#ifndef BSDCOMPRESS_SUPPORT +#define BSDCOMPRESS_SUPPORT 0 +#endif + +#ifndef PREDICTOR_SUPPORT +#define PREDICTOR_SUPPORT 0 +#endif + +/************************* +*** PUBLIC DEFINITIONS *** +*************************/ + +/* + * The basic PPP frame. + */ +#define PPP_HDRLEN 4 /* octets for standard ppp header */ +#define PPP_FCSLEN 2 /* octets for FCS */ + +/* + * Values for phase. + */ +#define PPP_PHASE_DEAD 0 +#define PPP_PHASE_MASTER 1 +#define PPP_PHASE_HOLDOFF 2 +#define PPP_PHASE_INITIALIZE 3 +#define PPP_PHASE_SERIALCONN 4 +#define PPP_PHASE_DORMANT 5 +#define PPP_PHASE_ESTABLISH 6 +#define PPP_PHASE_AUTHENTICATE 7 +#define PPP_PHASE_CALLBACK 8 +#define PPP_PHASE_NETWORK 9 +#define PPP_PHASE_RUNNING 10 +#define PPP_PHASE_TERMINATE 11 +#define PPP_PHASE_DISCONNECT 12 + +/* Error codes. */ +#define PPPERR_NONE 0 /* No error. */ +#define PPPERR_PARAM 1 /* Invalid parameter. */ +#define PPPERR_OPEN 2 /* Unable to open PPP session. */ +#define PPPERR_DEVICE 3 /* Invalid I/O device for PPP. */ +#define PPPERR_ALLOC 4 /* Unable to allocate resources. */ +#define PPPERR_USER 5 /* User interrupt. */ +#define PPPERR_CONNECT 6 /* Connection lost. */ +#define PPPERR_AUTHFAIL 7 /* Failed authentication challenge. */ +#define PPPERR_PROTOCOL 8 /* Failed to meet protocol. */ +#define PPPERR_PEERDEAD 9 /* Connection timeout */ +#define PPPERR_IDLETIMEOUT 10 /* Idle Timeout */ +#define PPPERR_CONNECTTIME 11 /* Max connect time reached */ +#define PPPERR_LOOPBACK 12 /* Loopback detected */ + +/* Whether auth support is enabled at all */ +#define PPP_AUTH_SUPPORT (PAP_SUPPORT || CHAP_SUPPORT || EAP_SUPPORT) + +/************************ +*** PUBLIC DATA TYPES *** +************************/ + +/* + * Other headers require ppp_pcb definition for prototypes, but ppp_pcb + * require some structure definition from other headers as well, we are + * fixing the dependency loop here by declaring the ppp_pcb type then + * by including headers containing necessary struct definition for ppp_pcb + */ +typedef struct ppp_pcb_s ppp_pcb; + +/* Type definitions for BSD code. */ +#ifndef __u_char_defined +typedef unsigned long u_long; +typedef unsigned int u_int; +typedef unsigned short u_short; +typedef unsigned char u_char; +#endif + +#include "fsm.h" +#include "lcp.h" +#if CCP_SUPPORT +#include "ccp.h" +#endif /* CCP_SUPPORT */ +#if MPPE_SUPPORT +#include "mppe.h" +#endif /* MPPE_SUPPORT */ +#if PPP_IPV4_SUPPORT +#include "ipcp.h" +#endif /* PPP_IPV4_SUPPORT */ +#if PPP_IPV6_SUPPORT +#include "ipv6cp.h" +#endif /* PPP_IPV6_SUPPORT */ +#if PAP_SUPPORT +#include "upap.h" +#endif /* PAP_SUPPORT */ +#if CHAP_SUPPORT +#include "chap-new.h" +#endif /* CHAP_SUPPORT */ +#if EAP_SUPPORT +#include "eap.h" +#endif /* EAP_SUPPORT */ +#if VJ_SUPPORT +#include "vj.h" +#endif /* VJ_SUPPORT */ + +/* Link status callback function prototype */ +typedef void (*ppp_link_status_cb_fn)(ppp_pcb *pcb, int err_code, void *ctx); + +/* + * PPP configuration. + */ +typedef struct ppp_settings_s { + +#if PPP_SERVER && PPP_AUTH_SUPPORT + unsigned int auth_required :1; /* Peer is required to authenticate */ + unsigned int null_login :1; /* Username of "" and a password of "" are acceptable */ +#endif /* PPP_SERVER && PPP_AUTH_SUPPORT */ +#if PPP_REMOTENAME + unsigned int explicit_remote :1; /* remote_name specified with remotename opt */ +#endif /* PPP_REMOTENAME */ +#if PAP_SUPPORT + unsigned int refuse_pap :1; /* Don't proceed auth. with PAP */ +#endif /* PAP_SUPPORT */ +#if CHAP_SUPPORT + unsigned int refuse_chap :1; /* Don't proceed auth. with CHAP */ +#endif /* CHAP_SUPPORT */ +#if MSCHAP_SUPPORT + unsigned int refuse_mschap :1; /* Don't proceed auth. with MS-CHAP */ + unsigned int refuse_mschap_v2 :1; /* Don't proceed auth. with MS-CHAPv2 */ +#endif /* MSCHAP_SUPPORT */ +#if EAP_SUPPORT + unsigned int refuse_eap :1; /* Don't proceed auth. with EAP */ +#endif /* EAP_SUPPORT */ +#if LWIP_DNS + unsigned int usepeerdns :1; /* Ask peer for DNS adds */ +#endif /* LWIP_DNS */ + unsigned int persist :1; /* Persist mode, always try to open the connection */ +#if PRINTPKT_SUPPORT + unsigned int hide_password :1; /* Hide password in dumped packets */ +#endif /* PRINTPKT_SUPPORT */ + unsigned int noremoteip :1; /* Let him have no IP address */ + unsigned int lax_recv :1; /* accept control chars in asyncmap */ + unsigned int noendpoint :1; /* don't send/accept endpoint discriminator */ +#if PPP_LCP_ADAPTIVE + unsigned int lcp_echo_adaptive :1; /* request echo only if the link was idle */ +#endif /* PPP_LCP_ADAPTIVE */ +#if MPPE_SUPPORT + unsigned int require_mppe :1; /* Require MPPE (Microsoft Point to Point Encryption) */ + unsigned int refuse_mppe_40 :1; /* Allow MPPE 40-bit mode? */ + unsigned int refuse_mppe_128 :1; /* Allow MPPE 128-bit mode? */ + unsigned int refuse_mppe_stateful :1; /* Allow MPPE stateful mode? */ +#endif /* MPPE_SUPPORT */ + + u16_t listen_time; /* time to listen first (ms), waiting for peer to send LCP packet */ + +#if PPP_IDLETIMELIMIT + u16_t idle_time_limit; /* Disconnect if idle for this many seconds */ +#endif /* PPP_IDLETIMELIMIT */ +#if PPP_MAXCONNECT + u32_t maxconnect; /* Maximum connect time (seconds) */ +#endif /* PPP_MAXCONNECT */ + +#if PPP_AUTH_SUPPORT + /* auth data */ + const char *user; /* Username for PAP */ + const char *passwd; /* Password for PAP, secret for CHAP */ +#if PPP_REMOTENAME + char remote_name[MAXNAMELEN + 1]; /* Peer's name for authentication */ +#endif /* PPP_REMOTENAME */ + +#if PAP_SUPPORT + u8_t pap_timeout_time; /* Timeout (seconds) for auth-req retrans. */ + u8_t pap_max_transmits; /* Number of auth-reqs sent */ +#if PPP_SERVER + u8_t pap_req_timeout; /* Time to wait for auth-req from peer */ +#endif /* PPP_SERVER */ +#endif /* PAP_SUPPPORT */ + +#if CHAP_SUPPORT +#if PPP_SERVER + u8_t chap_timeout_time; /* Timeout (seconds) for retransmitting req */ + u8_t chap_max_transmits; /* max # times to send challenge */ + u8_t chap_rechallenge_time; /* Time to wait for auth-req from peer */ +#endif /* PPP_SERVER */ +#endif /* CHAP_SUPPPORT */ + +#if EAP_SUPPORT + u8_t eap_req_time; /* Time to wait (for retransmit/fail) */ + u8_t eap_allow_req; /* Max Requests allowed */ +#if PPP_SERVER + u8_t eap_timeout_time; /* Time to wait (for retransmit/fail) */ + u8_t eap_max_transmits; /* Max Requests allowed */ +#endif /* PPP_SERVER */ +#endif /* EAP_SUPPORT */ + +#endif /* PPP_AUTH_SUPPORT */ + + u8_t fsm_timeout_time; /* Timeout time in seconds */ + u8_t fsm_max_conf_req_transmits; /* Maximum Configure-Request transmissions */ + u8_t fsm_max_term_transmits; /* Maximum Terminate-Request transmissions */ + u8_t fsm_max_nak_loops; /* Maximum number of nak loops tolerated */ + + u8_t lcp_loopbackfail; /* Number of times we receive our magic number from the peer + before deciding the link is looped-back. */ + u8_t lcp_echo_interval; /* Interval between LCP echo-requests */ + u8_t lcp_echo_fails; /* Tolerance to unanswered echo-requests */ + +} ppp_settings; + +#if PPP_SERVER +struct ppp_addrs { +#if PPP_IPV4_SUPPORT + ip4_addr_t our_ipaddr, his_ipaddr, netmask; +#if LWIP_DNS + ip4_addr_t dns1, dns2; +#endif /* LWIP_DNS */ +#endif /* PPP_IPV4_SUPPORT */ +#if PPP_IPV6_SUPPORT + ip6_addr_t our6_ipaddr, his6_ipaddr; +#endif /* PPP_IPV6_SUPPORT */ +}; +#endif /* PPP_SERVER */ + +/* + * PPP interface control block. + */ +struct ppp_pcb_s { + ppp_settings settings; + const struct link_callbacks *link_cb; + void *link_ctx_cb; + void (*link_status_cb)(ppp_pcb *pcb, int err_code, void *ctx); /* Status change callback */ +#if PPP_NOTIFY_PHASE + void (*notify_phase_cb)(ppp_pcb *pcb, u8_t phase, void *ctx); /* Notify phase callback */ +#endif /* PPP_NOTIFY_PHASE */ + void *ctx_cb; /* Callbacks optional pointer */ + struct netif *netif; /* PPP interface */ + u8_t phase; /* where the link is at */ + u8_t err_code; /* Code indicating why interface is down. */ + + /* flags */ +#if PPP_IPV4_SUPPORT + unsigned int ask_for_local :1; /* request our address from peer */ + unsigned int ipcp_is_open :1; /* haven't called np_finished() */ + unsigned int ipcp_is_up :1; /* have called ipcp_up() */ + unsigned int if4_up :1; /* True when the IPv4 interface is up. */ +#if 0 /* UNUSED - PROXY ARP */ + unsigned int proxy_arp_set :1; /* Have created proxy arp entry */ +#endif /* UNUSED - PROXY ARP */ +#endif /* PPP_IPV4_SUPPORT */ +#if PPP_IPV6_SUPPORT + unsigned int ipv6cp_is_up :1; /* have called ip6cp_up() */ + unsigned int if6_up :1; /* True when the IPv6 interface is up. */ +#endif /* PPP_IPV6_SUPPORT */ + unsigned int lcp_echo_timer_running :1; /* set if a timer is running */ +#if VJ_SUPPORT + unsigned int vj_enabled :1; /* Flag indicating VJ compression enabled. */ +#endif /* VJ_SUPPORT */ +#if CCP_SUPPORT + unsigned int ccp_all_rejected :1; /* we rejected all peer's options */ +#endif /* CCP_SUPPORT */ +#if MPPE_SUPPORT + unsigned int mppe_keys_set :1; /* Have the MPPE keys been set? */ +#endif /* MPPE_SUPPORT */ + +#if PPP_AUTH_SUPPORT + /* auth data */ +#if PPP_SERVER && defined(HAVE_MULTILINK) + char peer_authname[MAXNAMELEN + 1]; /* The name by which the peer authenticated itself to us. */ +#endif /* PPP_SERVER && defined(HAVE_MULTILINK) */ + u16_t auth_pending; /* Records which authentication operations haven't completed yet. */ + u16_t auth_done; /* Records which authentication operations have been completed. */ + +#if PAP_SUPPORT + upap_state upap; /* PAP data */ +#endif /* PAP_SUPPORT */ + +#if CHAP_SUPPORT + chap_client_state chap_client; /* CHAP client data */ +#if PPP_SERVER + chap_server_state chap_server; /* CHAP server data */ +#endif /* PPP_SERVER */ +#endif /* CHAP_SUPPORT */ + +#if EAP_SUPPORT + eap_state eap; /* EAP data */ +#endif /* EAP_SUPPORT */ +#endif /* PPP_AUTH_SUPPORT */ + + fsm lcp_fsm; /* LCP fsm structure */ + lcp_options lcp_wantoptions; /* Options that we want to request */ + lcp_options lcp_gotoptions; /* Options that peer ack'd */ + lcp_options lcp_allowoptions; /* Options we allow peer to request */ + lcp_options lcp_hisoptions; /* Options that we ack'd */ + u16_t peer_mru; /* currently negotiated peer MRU */ + u8_t lcp_echos_pending; /* Number of outstanding echo msgs */ + u8_t lcp_echo_number; /* ID number of next echo frame */ + + u8_t num_np_open; /* Number of network protocols which we have opened. */ + u8_t num_np_up; /* Number of network protocols which have come up. */ + +#if VJ_SUPPORT + struct vjcompress vj_comp; /* Van Jacobson compression header. */ +#endif /* VJ_SUPPORT */ + +#if CCP_SUPPORT + fsm ccp_fsm; /* CCP fsm structure */ + ccp_options ccp_wantoptions; /* what to request the peer to use */ + ccp_options ccp_gotoptions; /* what the peer agreed to do */ + ccp_options ccp_allowoptions; /* what we'll agree to do */ + ccp_options ccp_hisoptions; /* what we agreed to do */ + u8_t ccp_localstate; /* Local state (mainly for handling reset-reqs and reset-acks). */ + u8_t ccp_receive_method; /* Method chosen on receive path */ + u8_t ccp_transmit_method; /* Method chosen on transmit path */ +#if MPPE_SUPPORT + ppp_mppe_state mppe_comp; /* MPPE "compressor" structure */ + ppp_mppe_state mppe_decomp; /* MPPE "decompressor" structure */ +#endif /* MPPE_SUPPORT */ +#endif /* CCP_SUPPORT */ + +#if PPP_IPV4_SUPPORT + fsm ipcp_fsm; /* IPCP fsm structure */ + ipcp_options ipcp_wantoptions; /* Options that we want to request */ + ipcp_options ipcp_gotoptions; /* Options that peer ack'd */ + ipcp_options ipcp_allowoptions; /* Options we allow peer to request */ + ipcp_options ipcp_hisoptions; /* Options that we ack'd */ +#endif /* PPP_IPV4_SUPPORT */ + +#if PPP_IPV6_SUPPORT + fsm ipv6cp_fsm; /* IPV6CP fsm structure */ + ipv6cp_options ipv6cp_wantoptions; /* Options that we want to request */ + ipv6cp_options ipv6cp_gotoptions; /* Options that peer ack'd */ + ipv6cp_options ipv6cp_allowoptions; /* Options we allow peer to request */ + ipv6cp_options ipv6cp_hisoptions; /* Options that we ack'd */ +#endif /* PPP_IPV6_SUPPORT */ +}; + +/************************ + *** PUBLIC FUNCTIONS *** + ************************/ + +/* + * WARNING: For multi-threads environment, all ppp_set_* functions most + * only be called while the PPP is in the dead phase (i.e. disconnected). + */ + +#if PPP_AUTH_SUPPORT +/* + * Set PPP authentication. + * + * Warning: Using PPPAUTHTYPE_ANY might have security consequences. + * RFC 1994 says: + * + * In practice, within or associated with each PPP server, there is a + * database which associates "user" names with authentication + * information ("secrets"). It is not anticipated that a particular + * named user would be authenticated by multiple methods. This would + * make the user vulnerable to attacks which negotiate the least secure + * method from among a set (such as PAP rather than CHAP). If the same + * secret was used, PAP would reveal the secret to be used later with + * CHAP. + * + * Instead, for each user name there should be an indication of exactly + * one method used to authenticate that user name. If a user needs to + * make use of different authentication methods under different + * circumstances, then distinct user names SHOULD be employed, each of + * which identifies exactly one authentication method. + * + * Default is none auth type, unset (NULL) user and passwd. + */ +#define PPPAUTHTYPE_NONE 0x00 +#define PPPAUTHTYPE_PAP 0x01 +#define PPPAUTHTYPE_CHAP 0x02 +#define PPPAUTHTYPE_MSCHAP 0x04 +#define PPPAUTHTYPE_MSCHAP_V2 0x08 +#define PPPAUTHTYPE_EAP 0x10 +#define PPPAUTHTYPE_ANY 0xff +void ppp_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd); + +/* + * If set, peer is required to authenticate. This is mostly necessary for PPP server support. + * + * Default is false. + */ +#define ppp_set_auth_required(ppp, boolval) (ppp->settings.auth_required = boolval) +#endif /* PPP_AUTH_SUPPORT */ + +#if PPP_IPV4_SUPPORT +/* + * Set PPP interface "our" and "his" IPv4 addresses. This is mostly necessary for PPP server + * support but it can also be used on a PPP link where each side choose its own IP address. + * + * Default is unset (0.0.0.0). + */ +#define ppp_set_ipcp_ouraddr(ppp, addr) do { ppp->ipcp_wantoptions.ouraddr = ip4_addr_get_u32(addr); \ + ppp->ask_for_local = ppp->ipcp_wantoptions.ouraddr != 0; } while(0) +#define ppp_set_ipcp_hisaddr(ppp, addr) (ppp->ipcp_wantoptions.hisaddr = ip4_addr_get_u32(addr)) +#if LWIP_DNS +/* + * Set DNS server addresses that are sent if the peer asks for them. This is mostly necessary + * for PPP server support. + * + * Default is unset (0.0.0.0). + */ +#define ppp_set_ipcp_dnsaddr(ppp, index, addr) (ppp->ipcp_allowoptions.dnsaddr[index] = ip4_addr_get_u32(addr)) + +/* + * If set, we ask the peer for up to 2 DNS server addresses. Received DNS server addresses are + * registered using the dns_setserver() function. + * + * Default is false. + */ +#define ppp_set_usepeerdns(ppp, boolval) (ppp->settings.usepeerdns = boolval) +#endif /* LWIP_DNS */ +#endif /* PPP_IPV4_SUPPORT */ + +#if MPPE_SUPPORT +/* Disable MPPE (Microsoft Point to Point Encryption). This parameter is exclusive. */ +#define PPP_MPPE_DISABLE 0x00 +/* Require the use of MPPE (Microsoft Point to Point Encryption). */ +#define PPP_MPPE_ENABLE 0x01 +/* Allow MPPE to use stateful mode. Stateless mode is still attempted first. */ +#define PPP_MPPE_ALLOW_STATEFUL 0x02 +/* Refuse the use of MPPE with 40-bit encryption. Conflict with PPP_MPPE_REFUSE_128. */ +#define PPP_MPPE_REFUSE_40 0x04 +/* Refuse the use of MPPE with 128-bit encryption. Conflict with PPP_MPPE_REFUSE_40. */ +#define PPP_MPPE_REFUSE_128 0x08 +/* + * Set MPPE configuration + * + * Default is disabled. + */ +void ppp_set_mppe(ppp_pcb *pcb, u8_t flags); +#endif /* MPPE_SUPPORT */ + +/* + * Wait for up to intval milliseconds for a valid PPP packet from the peer. + * At the end of this time, or when a valid PPP packet is received from the + * peer, we commence negotiation by sending our first LCP packet. + * + * Default is 0. + */ +#define ppp_set_listen_time(ppp, intval) (ppp->settings.listen_time = intval) + +/* + * If set, we will attempt to initiate a connection but if no reply is received from + * the peer, we will then just wait passively for a valid LCP packet from the peer. + * + * Default is false. + */ +#define ppp_set_passive(ppp, boolval) (ppp->lcp_wantoptions.passive = boolval) + +/* + * If set, we will not transmit LCP packets to initiate a connection until a valid + * LCP packet is received from the peer. This is what we usually call the server mode. + * + * Default is false. + */ +#define ppp_set_silent(ppp, boolval) (ppp->lcp_wantoptions.silent = boolval) + +/* + * If set, enable protocol field compression negotiation in both the receive and + * the transmit direction. + * + * Default is true. + */ +#define ppp_set_neg_pcomp(ppp, boolval) (ppp->lcp_wantoptions.neg_pcompression = \ + ppp->lcp_allowoptions.neg_pcompression = boolval) + +/* + * If set, enable Address/Control compression in both the receive and the transmit + * direction. + * + * Default is true. + */ +#define ppp_set_neg_accomp(ppp, boolval) (ppp->lcp_wantoptions.neg_accompression = \ + ppp->lcp_allowoptions.neg_accompression = boolval) + +/* + * If set, enable asyncmap negotiation. Otherwise forcing all control characters to + * be escaped for both the transmit and the receive direction. + * + * Default is true. + */ +#define ppp_set_neg_asyncmap(ppp, boolval) (ppp->lcp_wantoptions.neg_asyncmap = \ + ppp->lcp_allowoptions.neg_asyncmap = boolval) + +/* + * This option sets the Async-Control-Character-Map (ACCM) for this end of the link. + * The ACCM is a set of 32 bits, one for each of the ASCII control characters with + * values from 0 to 31, where a 1 bit indicates that the corresponding control + * character should not be used in PPP packets sent to this system. The map is + * an unsigned 32 bits integer where the least significant bit (00000001) represents + * character 0 and the most significant bit (80000000) represents character 31. + * We will then ask the peer to send these characters as a 2-byte escape sequence. + * + * Default is 0. + */ +#define ppp_set_asyncmap(ppp, intval) (ppp->lcp_wantoptions.asyncmap = intval) + +/* + * Set a PPP interface as the default network interface + * (used to output all packets for which no specific route is found). + */ +#define ppp_set_default(ppp) netif_set_default(ppp->netif) + +#if PPP_NOTIFY_PHASE +/* + * Set a PPP notify phase callback. + * + * This can be used for example to set a LED pattern depending on the + * current phase of the PPP session. + */ +typedef void (*ppp_notify_phase_cb_fn)(ppp_pcb *pcb, u8_t phase, void *ctx); +void ppp_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb); +#endif /* PPP_NOTIFY_PHASE */ + +/* + * Initiate a PPP connection. + * + * This can only be called if PPP is in the dead phase. + * + * Holdoff is the time to wait (in seconds) before initiating + * the connection. + * + * If this port connects to a modem, the modem connection must be + * established before calling this. + */ +err_t ppp_connect(ppp_pcb *pcb, u16_t holdoff); + +#if PPP_SERVER +/* + * Listen for an incoming PPP connection. + * + * This can only be called if PPP is in the dead phase. + * + * If this port connects to a modem, the modem connection must be + * established before calling this. + */ +err_t ppp_listen(ppp_pcb *pcb); +#endif /* PPP_SERVER */ + +/* + * Initiate the end of a PPP connection. + * Any outstanding packets in the queues are dropped. + * + * Setting nocarrier to 1 close the PPP connection without initiating the + * shutdown procedure. Always using nocarrier = 0 is still recommended, + * this is going to take a little longer time if your link is down, but + * is a safer choice for the PPP state machine. + * + * Return 0 on success, an error code on failure. + */ +err_t ppp_close(ppp_pcb *pcb, u8_t nocarrier); + +/* + * Release the control block. + * + * This can only be called if PPP is in the dead phase. + * + * You must use ppp_close() before if you wish to terminate + * an established PPP session. + * + * Return 0 on success, an error code on failure. + */ +err_t ppp_free(ppp_pcb *pcb); + +/* + * PPP IOCTL commands. + * + * Get the up status - 0 for down, non-zero for up. The argument must + * point to an int. + */ +#define PPPCTLG_UPSTATUS 0 + +/* + * Get the PPP error code. The argument must point to an int. + * Returns a PPPERR_* value. + */ +#define PPPCTLG_ERRCODE 1 + +/* + * Get the fd associated with a PPP over serial + */ +#define PPPCTLG_FD 2 + +/* + * Get and set parameters for the given connection. + * Return 0 on success, an error code on failure. + */ +err_t ppp_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg); + +/* Get the PPP netif interface */ +#define ppp_netif(ppp) (ppp->netif) + +/* Set an lwIP-style status-callback for the selected PPP device */ +#define ppp_set_netif_statuscallback(ppp, status_cb) \ + netif_set_status_callback(ppp->netif, status_cb); + +/* Set an lwIP-style link-callback for the selected PPP device */ +#define ppp_set_netif_linkcallback(ppp, link_cb) \ + netif_set_link_callback(ppp->netif, link_cb); + +#ifdef __cplusplus +} +#endif + +#endif /* PPP_H */ + +#endif /* PPP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/ppp_impl.h b/lib/lwip/include/netif/ppp/ppp_impl.h new file mode 100644 index 0000000000..22828311a7 --- /dev/null +++ b/lib/lwip/include/netif/ppp/ppp_impl.h @@ -0,0 +1,736 @@ +/***************************************************************************** +* ppp.h - Network Point to Point Protocol header file. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1997 Global Election Systems Inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 03-01-01 Marc Boucher marc@mbsi.ca +* Ported to lwIP. +* 97-11-05 Guy Lancaster glanca@gesn.com, Global Election Systems Inc. +* Original derived from BSD codes. +*****************************************************************************/ +#ifndef LWIP_HDR_PPP_IMPL_H +#define LWIP_HDR_PPP_IMPL_H + +#include "netif/ppp/ppp_opts.h" + +#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifdef PPP_INCLUDE_SETTINGS_HEADER +#include "ppp_settings.h" +#endif + +#include <stdio.h> /* formats */ +#include <stdarg.h> +#include <string.h> +#include <stdlib.h> /* strtol() */ + +#include "lwip/netif.h" +#include "lwip/def.h" +#include "lwip/timeouts.h" + +#include "ppp.h" +#include "pppdebug.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Memory used for control packets. + * + * PPP_CTRL_PBUF_UNKNOWN_SIZE is the amount of memory we allocate when we + * cannot figure out how much we are going to use before filling the buffer. + */ +#define PPP_CTRL_PBUF_UNKNOWN_SIZE 512 + +/* + * The basic PPP frame. + */ +#define PPP_ADDRESS(p) (((u_char *)(p))[0]) +#define PPP_CONTROL(p) (((u_char *)(p))[1]) +#define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3]) + +/* + * Significant octet values. + */ +#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ +#define PPP_UI 0x03 /* Unnumbered Information */ +#define PPP_FLAG 0x7e /* Flag Sequence */ +#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ +#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ + +/* + * PPP_DEFMRU: MRU value used prior negotiation and unless negotiated later. + * Must be 1500. + */ +#define PPP_DEFMRU 1500 + +/* + * Protocol field values. + */ +#if PPP_IPV4_SUPPORT +#define PPP_IP 0x21 /* Internet Protocol */ +#endif /* PPP_IPV4_SUPPORT */ +#if 0 /* UNUSED */ +#define PPP_AT 0x29 /* AppleTalk Protocol */ +#define PPP_IPX 0x2b /* IPX protocol */ +#endif /* UNUSED */ +#if VJ_SUPPORT +#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ +#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ +#endif /* VJ_SUPPORT */ +#if PPP_IPV6_SUPPORT +#define PPP_IPV6 0x57 /* Internet Protocol Version 6 */ +#endif /* PPP_IPV6_SUPPORT */ +#if CCP_SUPPORT +#define PPP_COMP 0xfd /* compressed packet */ +#endif /* CCP_SUPPORT */ +#define PPP_IPCP 0x8021 /* IP Control Protocol */ +#if 0 /* UNUSED */ +#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ +#define PPP_IPXCP 0x802b /* IPX Control Protocol */ +#endif /* UNUSED */ +#if PPP_IPV6_SUPPORT +#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ +#endif /* PPP_IPV6_SUPPORT */ +#if CCP_SUPPORT +#define PPP_CCP 0x80fd /* Compression Control Protocol */ +#endif /* CCP_SUPPORT */ +#if ECP_SUPPORT +#define PPP_ECP 0x8053 /* Encryption Control Protocol */ +#endif /* ECP_SUPPORT */ +#define PPP_LCP 0xc021 /* Link Control Protocol */ +#if PAP_SUPPORT +#define PPP_PAP 0xc023 /* Password Authentication Protocol */ +#endif /* PAP_SUPPORT */ +#if LQR_SUPPORT +#define PPP_LQR 0xc025 /* Link Quality Report protocol */ +#endif /* LQR_SUPPORT */ +#if CHAP_SUPPORT +#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ +#endif /* CHAP_SUPPORT */ +#if CBCP_SUPPORT +#define PPP_CBCP 0xc029 /* Callback Control Protocol */ +#endif /* CBCP_SUPPORT */ +#if EAP_SUPPORT +#define PPP_EAP 0xc227 /* Extensible Authentication Protocol */ +#endif /* EAP_SUPPORT */ + +/* + * The following struct gives the addresses of procedures to call + * for a particular lower link level protocol. + */ +struct link_callbacks { + /* Start a connection (e.g. Initiate discovery phase) */ + void (*connect) (ppp_pcb *pcb, void *ctx); +#if PPP_SERVER + /* Listen for an incoming connection (Passive mode) */ + void (*listen) (ppp_pcb *pcb, void *ctx); +#endif /* PPP_SERVER */ + /* End a connection (i.e. initiate disconnect phase) */ + void (*disconnect) (ppp_pcb *pcb, void *ctx); + /* Free lower protocol control block */ + err_t (*free) (ppp_pcb *pcb, void *ctx); + /* Write a pbuf to a ppp link, only used from PPP functions to send PPP packets. */ + err_t (*write)(ppp_pcb *pcb, void *ctx, struct pbuf *p); + /* Send a packet from lwIP core (IPv4 or IPv6) */ + err_t (*netif_output)(ppp_pcb *pcb, void *ctx, struct pbuf *p, u_short protocol); + /* configure the transmit-side characteristics of the PPP interface */ + void (*send_config)(ppp_pcb *pcb, void *ctx, u32_t accm, int pcomp, int accomp); + /* confire the receive-side characteristics of the PPP interface */ + void (*recv_config)(ppp_pcb *pcb, void *ctx, u32_t accm, int pcomp, int accomp); +}; + +/* + * What to do with network protocol (NP) packets. + */ +enum NPmode { + NPMODE_PASS, /* pass the packet through */ + NPMODE_DROP, /* silently drop the packet */ + NPMODE_ERROR, /* return an error */ + NPMODE_QUEUE /* save it up for later. */ +}; + +/* + * Statistics. + */ +#if PPP_STATS_SUPPORT +struct pppstat { + unsigned int ppp_ibytes; /* bytes received */ + unsigned int ppp_ipackets; /* packets received */ + unsigned int ppp_ierrors; /* receive errors */ + unsigned int ppp_obytes; /* bytes sent */ + unsigned int ppp_opackets; /* packets sent */ + unsigned int ppp_oerrors; /* transmit errors */ +}; + +#if VJ_SUPPORT +struct vjstat { + unsigned int vjs_packets; /* outbound packets */ + unsigned int vjs_compressed; /* outbound compressed packets */ + unsigned int vjs_searches; /* searches for connection state */ + unsigned int vjs_misses; /* times couldn't find conn. state */ + unsigned int vjs_uncompressedin; /* inbound uncompressed packets */ + unsigned int vjs_compressedin; /* inbound compressed packets */ + unsigned int vjs_errorin; /* inbound unknown type packets */ + unsigned int vjs_tossed; /* inbound packets tossed because of error */ +}; +#endif /* VJ_SUPPORT */ + +struct ppp_stats { + struct pppstat p; /* basic PPP statistics */ +#if VJ_SUPPORT + struct vjstat vj; /* VJ header compression statistics */ +#endif /* VJ_SUPPORT */ +}; + +#if CCP_SUPPORT +struct compstat { + unsigned int unc_bytes; /* total uncompressed bytes */ + unsigned int unc_packets; /* total uncompressed packets */ + unsigned int comp_bytes; /* compressed bytes */ + unsigned int comp_packets; /* compressed packets */ + unsigned int inc_bytes; /* incompressible bytes */ + unsigned int inc_packets; /* incompressible packets */ + unsigned int ratio; /* recent compression ratio << 8 */ +}; + +struct ppp_comp_stats { + struct compstat c; /* packet compression statistics */ + struct compstat d; /* packet decompression statistics */ +}; +#endif /* CCP_SUPPORT */ + +#endif /* PPP_STATS_SUPPORT */ + +#if PPP_IDLETIMELIMIT +/* + * The following structure records the time in seconds since + * the last NP packet was sent or received. + */ +struct ppp_idle { + time_t xmit_idle; /* time since last NP packet sent */ + time_t recv_idle; /* time since last NP packet received */ +}; +#endif /* PPP_IDLETIMELIMIT */ + +/* values for epdisc.class */ +#define EPD_NULL 0 /* null discriminator, no data */ +#define EPD_LOCAL 1 +#define EPD_IP 2 +#define EPD_MAC 3 +#define EPD_MAGIC 4 +#define EPD_PHONENUM 5 + +/* + * Global variables. + */ +#ifdef HAVE_MULTILINK +extern u8_t multilink; /* enable multilink operation */ +extern u8_t doing_multilink; +extern u8_t multilink_master; +extern u8_t bundle_eof; +extern u8_t bundle_terminating; +#endif + +#ifdef MAXOCTETS +extern unsigned int maxoctets; /* Maximum octetes per session (in bytes) */ +extern int maxoctets_dir; /* Direction : + 0 - in+out (default) + 1 - in + 2 - out + 3 - max(in,out) */ +extern int maxoctets_timeout; /* Timeout for check of octets limit */ +#define PPP_OCTETS_DIRECTION_SUM 0 +#define PPP_OCTETS_DIRECTION_IN 1 +#define PPP_OCTETS_DIRECTION_OUT 2 +#define PPP_OCTETS_DIRECTION_MAXOVERAL 3 +/* same as previous, but little different on RADIUS side */ +#define PPP_OCTETS_DIRECTION_MAXSESSION 4 +#endif + +/* Data input may be used by CCP and ECP, remove this entry + * from struct protent to save some flash + */ +#define PPP_DATAINPUT 0 + +/* + * The following struct gives the addresses of procedures to call + * for a particular protocol. + */ +struct protent { + u_short protocol; /* PPP protocol number */ + /* Initialization procedure */ + void (*init) (ppp_pcb *pcb); + /* Process a received packet */ + void (*input) (ppp_pcb *pcb, u_char *pkt, int len); + /* Process a received protocol-reject */ + void (*protrej) (ppp_pcb *pcb); + /* Lower layer has come up */ + void (*lowerup) (ppp_pcb *pcb); + /* Lower layer has gone down */ + void (*lowerdown) (ppp_pcb *pcb); + /* Open the protocol */ + void (*open) (ppp_pcb *pcb); + /* Close the protocol */ + void (*close) (ppp_pcb *pcb, const char *reason); +#if PRINTPKT_SUPPORT + /* Print a packet in readable form */ + int (*printpkt) (const u_char *pkt, int len, + void (*printer) (void *, const char *, ...), + void *arg); +#endif /* PRINTPKT_SUPPORT */ +#if PPP_DATAINPUT + /* Process a received data packet */ + void (*datainput) (ppp_pcb *pcb, u_char *pkt, int len); +#endif /* PPP_DATAINPUT */ +#if PRINTPKT_SUPPORT + const char *name; /* Text name of protocol */ + const char *data_name; /* Text name of corresponding data protocol */ +#endif /* PRINTPKT_SUPPORT */ +#if PPP_OPTIONS + option_t *options; /* List of command-line options */ + /* Check requested options, assign defaults */ + void (*check_options) (void); +#endif /* PPP_OPTIONS */ +#if DEMAND_SUPPORT + /* Configure interface for demand-dial */ + int (*demand_conf) (int unit); + /* Say whether to bring up link for this pkt */ + int (*active_pkt) (u_char *pkt, int len); +#endif /* DEMAND_SUPPORT */ +}; + +/* Table of pointers to supported protocols */ +extern const struct protent* const protocols[]; + + +/* Values for auth_pending, auth_done */ +#if PAP_SUPPORT +#define PAP_WITHPEER 0x1 +#define PAP_PEER 0x2 +#endif /* PAP_SUPPORT */ +#if CHAP_SUPPORT +#define CHAP_WITHPEER 0x4 +#define CHAP_PEER 0x8 +#endif /* CHAP_SUPPORT */ +#if EAP_SUPPORT +#define EAP_WITHPEER 0x10 +#define EAP_PEER 0x20 +#endif /* EAP_SUPPORT */ + +/* Values for auth_done only */ +#if CHAP_SUPPORT +#define CHAP_MD5_WITHPEER 0x40 +#define CHAP_MD5_PEER 0x80 +#if MSCHAP_SUPPORT +#define CHAP_MS_SHIFT 8 /* LSB position for MS auths */ +#define CHAP_MS_WITHPEER 0x100 +#define CHAP_MS_PEER 0x200 +#define CHAP_MS2_WITHPEER 0x400 +#define CHAP_MS2_PEER 0x800 +#endif /* MSCHAP_SUPPORT */ +#endif /* CHAP_SUPPORT */ + +/* Supported CHAP protocols */ +#if CHAP_SUPPORT + +#if MSCHAP_SUPPORT +#define CHAP_MDTYPE_SUPPORTED (MDTYPE_MICROSOFT_V2 | MDTYPE_MICROSOFT | MDTYPE_MD5) +#else /* MSCHAP_SUPPORT */ +#define CHAP_MDTYPE_SUPPORTED (MDTYPE_MD5) +#endif /* MSCHAP_SUPPORT */ + +#else /* CHAP_SUPPORT */ +#define CHAP_MDTYPE_SUPPORTED (MDTYPE_NONE) +#endif /* CHAP_SUPPORT */ + +#if PPP_STATS_SUPPORT +/* + * PPP statistics structure + */ +struct pppd_stats { + unsigned int bytes_in; + unsigned int bytes_out; + unsigned int pkts_in; + unsigned int pkts_out; +}; +#endif /* PPP_STATS_SUPPORT */ + + +/* + * PPP private functions + */ + + +/* + * Functions called from lwIP core. + */ + +/* initialize the PPP subsystem */ +int ppp_init(void); + +/* + * Functions called from PPP link protocols. + */ + +/* Create a new PPP control block */ +ppp_pcb *ppp_new(struct netif *pppif, const struct link_callbacks *callbacks, void *link_ctx_cb, + ppp_link_status_cb_fn link_status_cb, void *ctx_cb); + +/* Initiate LCP open request */ +void ppp_start(ppp_pcb *pcb); + +/* Called when link failed to setup */ +void ppp_link_failed(ppp_pcb *pcb); + +/* Called when link is normally down (i.e. it was asked to end) */ +void ppp_link_end(ppp_pcb *pcb); + +/* function called to process input packet */ +void ppp_input(ppp_pcb *pcb, struct pbuf *pb); + + +/* + * Functions called by PPP protocols. + */ + +/* function called by all PPP subsystems to send packets */ +err_t ppp_write(ppp_pcb *pcb, struct pbuf *p); + +/* functions called by auth.c link_terminated() */ +void ppp_link_terminated(ppp_pcb *pcb); + +void new_phase(ppp_pcb *pcb, int p); + +int ppp_send_config(ppp_pcb *pcb, int mtu, u32_t accm, int pcomp, int accomp); +int ppp_recv_config(ppp_pcb *pcb, int mru, u32_t accm, int pcomp, int accomp); + +#if PPP_IPV4_SUPPORT +int sifaddr(ppp_pcb *pcb, u32_t our_adr, u32_t his_adr, u32_t netmask); +int cifaddr(ppp_pcb *pcb, u32_t our_adr, u32_t his_adr); +#if 0 /* UNUSED - PROXY ARP */ +int sifproxyarp(ppp_pcb *pcb, u32_t his_adr); +int cifproxyarp(ppp_pcb *pcb, u32_t his_adr); +#endif /* UNUSED - PROXY ARP */ +#if LWIP_DNS +int sdns(ppp_pcb *pcb, u32_t ns1, u32_t ns2); +int cdns(ppp_pcb *pcb, u32_t ns1, u32_t ns2); +#endif /* LWIP_DNS */ +#if VJ_SUPPORT +int sifvjcomp(ppp_pcb *pcb, int vjcomp, int cidcomp, int maxcid); +#endif /* VJ_SUPPORT */ +int sifup(ppp_pcb *pcb); +int sifdown (ppp_pcb *pcb); +u32_t get_mask(u32_t addr); +#endif /* PPP_IPV4_SUPPORT */ + +#if PPP_IPV6_SUPPORT +int sif6addr(ppp_pcb *pcb, eui64_t our_eui64, eui64_t his_eui64); +int cif6addr(ppp_pcb *pcb, eui64_t our_eui64, eui64_t his_eui64); +int sif6up(ppp_pcb *pcb); +int sif6down (ppp_pcb *pcb); +#endif /* PPP_IPV6_SUPPORT */ + +#if DEMAND_SUPPORT +int sifnpmode(ppp_pcb *pcb, int proto, enum NPmode mode); +#endif /* DEMAND_SUPPORt */ + +void ppp_netif_set_mtu(ppp_pcb *pcb, int mtu); +int ppp_netif_get_mtu(ppp_pcb *pcb); + +#if CCP_SUPPORT +#if 0 /* unused */ +int ccp_test(ppp_pcb *pcb, u_char *opt_ptr, int opt_len, int for_transmit); +#endif /* unused */ +void ccp_set(ppp_pcb *pcb, u8_t isopen, u8_t isup, u8_t receive_method, u8_t transmit_method); +void ccp_reset_comp(ppp_pcb *pcb); +void ccp_reset_decomp(ppp_pcb *pcb); +#if 0 /* unused */ +int ccp_fatal_error(ppp_pcb *pcb); +#endif /* unused */ +#endif /* CCP_SUPPORT */ + +#if PPP_IDLETIMELIMIT +int get_idle_time(ppp_pcb *pcb, struct ppp_idle *ip); +#endif /* PPP_IDLETIMELIMIT */ + +#if DEMAND_SUPPORT +int get_loop_output(void); +#endif /* DEMAND_SUPPORT */ + +/* Optional protocol names list, to make our messages a little more informative. */ +#if PPP_PROTOCOLNAME +const char * protocol_name(int proto); +#endif /* PPP_PROTOCOLNAME */ + +/* Optional stats support, to get some statistics on the PPP interface */ +#if PPP_STATS_SUPPORT +void print_link_stats(void); /* Print stats, if available */ +void reset_link_stats(int u); /* Reset (init) stats when link goes up */ +void update_link_stats(int u); /* Get stats at link termination */ +#endif /* PPP_STATS_SUPPORT */ + + + +/* + * Inline versions of get/put char/short/long. + * Pointer is advanced; we assume that both arguments + * are lvalues and will already be in registers. + * cp MUST be u_char *. + */ +#define GETCHAR(c, cp) { \ + (c) = *(cp)++; \ +} +#define PUTCHAR(c, cp) { \ + *(cp)++ = (u_char) (c); \ +} +#define GETSHORT(s, cp) { \ + (s) = *(cp)++ << 8; \ + (s) |= *(cp)++; \ +} +#define PUTSHORT(s, cp) { \ + *(cp)++ = (u_char) ((s) >> 8); \ + *(cp)++ = (u_char) (s); \ +} +#define GETLONG(l, cp) { \ + (l) = *(cp)++ << 8; \ + (l) |= *(cp)++; (l) <<= 8; \ + (l) |= *(cp)++; (l) <<= 8; \ + (l) |= *(cp)++; \ +} +#define PUTLONG(l, cp) { \ + *(cp)++ = (u_char) ((l) >> 24); \ + *(cp)++ = (u_char) ((l) >> 16); \ + *(cp)++ = (u_char) ((l) >> 8); \ + *(cp)++ = (u_char) (l); \ +} + +#define INCPTR(n, cp) ((cp) += (n)) +#define DECPTR(n, cp) ((cp) -= (n)) + +/* + * System dependent definitions for user-level 4.3BSD UNIX implementation. + */ +#define TIMEOUT(f, a, t) do { sys_untimeout((f), (a)); sys_timeout((t)*1000, (f), (a)); } while(0) +#define TIMEOUTMS(f, a, t) do { sys_untimeout((f), (a)); sys_timeout((t), (f), (a)); } while(0) +#define UNTIMEOUT(f, a) sys_untimeout((f), (a)) + +#define BZERO(s, n) memset(s, 0, n) +#define BCMP(s1, s2, l) memcmp(s1, s2, l) + +#define PRINTMSG(m, l) { ppp_info(("Remote message: %0.*v", l, m)); } + +/* + * MAKEHEADER - Add Header fields to a packet. + */ +#define MAKEHEADER(p, t) { \ + PUTCHAR(PPP_ALLSTATIONS, p); \ + PUTCHAR(PPP_UI, p); \ + PUTSHORT(t, p); } + +/* Procedures exported from auth.c */ +void link_required(ppp_pcb *pcb); /* we are starting to use the link */ +void link_terminated(ppp_pcb *pcb); /* we are finished with the link */ +void link_down(ppp_pcb *pcb); /* the LCP layer has left the Opened state */ +void upper_layers_down(ppp_pcb *pcb); /* take all NCPs down */ +void link_established(ppp_pcb *pcb); /* the link is up; authenticate now */ +void start_networks(ppp_pcb *pcb); /* start all the network control protos */ +void continue_networks(ppp_pcb *pcb); /* start network [ip, etc] control protos */ +#if PPP_AUTH_SUPPORT +#if PPP_SERVER +int auth_check_passwd(ppp_pcb *pcb, char *auser, unsigned int userlen, char *apasswd, unsigned int passwdlen, const char **msg, int *msglen); + /* check the user name and passwd against configuration */ +void auth_peer_fail(ppp_pcb *pcb, int protocol); + /* peer failed to authenticate itself */ +void auth_peer_success(ppp_pcb *pcb, int protocol, int prot_flavor, const char *name, int namelen); + /* peer successfully authenticated itself */ +#endif /* PPP_SERVER */ +void auth_withpeer_fail(ppp_pcb *pcb, int protocol); + /* we failed to authenticate ourselves */ +void auth_withpeer_success(ppp_pcb *pcb, int protocol, int prot_flavor); + /* we successfully authenticated ourselves */ +#endif /* PPP_AUTH_SUPPORT */ +void np_up(ppp_pcb *pcb, int proto); /* a network protocol has come up */ +void np_down(ppp_pcb *pcb, int proto); /* a network protocol has gone down */ +void np_finished(ppp_pcb *pcb, int proto); /* a network protocol no longer needs link */ +#if PPP_AUTH_SUPPORT +int get_secret(ppp_pcb *pcb, const char *client, const char *server, char *secret, int *secret_len, int am_server); + /* get "secret" for chap */ +#endif /* PPP_AUTH_SUPPORT */ + +/* Procedures exported from ipcp.c */ +/* int parse_dotted_ip (char *, u32_t *); */ + +/* Procedures exported from demand.c */ +#if DEMAND_SUPPORT +void demand_conf (void); /* config interface(s) for demand-dial */ +void demand_block (void); /* set all NPs to queue up packets */ +void demand_unblock (void); /* set all NPs to pass packets */ +void demand_discard (void); /* set all NPs to discard packets */ +void demand_rexmit (int, u32_t); /* retransmit saved frames for an NP*/ +int loop_chars (unsigned char *, int); /* process chars from loopback */ +int loop_frame (unsigned char *, int); /* should we bring link up? */ +#endif /* DEMAND_SUPPORT */ + +/* Procedures exported from multilink.c */ +#ifdef HAVE_MULTILINK +void mp_check_options (void); /* Check multilink-related options */ +int mp_join_bundle (void); /* join our link to an appropriate bundle */ +void mp_exit_bundle (void); /* have disconnected our link from bundle */ +void mp_bundle_terminated (void); +char *epdisc_to_str (struct epdisc *); /* string from endpoint discrim. */ +int str_to_epdisc (struct epdisc *, char *); /* endpt disc. from str */ +#else +#define mp_bundle_terminated() /* nothing */ +#define mp_exit_bundle() /* nothing */ +#define doing_multilink 0 +#define multilink_master 0 +#endif + +/* Procedures exported from utils.c. */ +void ppp_print_string(const u_char *p, int len, void (*printer) (void *, const char *, ...), void *arg); /* Format a string for output */ +int ppp_slprintf(char *buf, int buflen, const char *fmt, ...); /* sprintf++ */ +int ppp_vslprintf(char *buf, int buflen, const char *fmt, va_list args); /* vsprintf++ */ +size_t ppp_strlcpy(char *dest, const char *src, size_t len); /* safe strcpy */ +size_t ppp_strlcat(char *dest, const char *src, size_t len); /* safe strncpy */ +void ppp_dbglog_impl(const char *fmt, ...); /* log a debug message */ +void ppp_info_impl(const char *fmt, ...); /* log an informational message */ +void ppp_notice_impl(const char *fmt, ...); /* log a notice-level message */ +void ppp_warn_impl(const char *fmt, ...); /* log a warning message */ +void ppp_error_impl(const char *fmt, ...); /* log an error message */ +void ppp_fatal_impl(const char *fmt, ...); /* log an error message and die(1) */ +/* wrap all the above functions so they will only be linked when enabled */ +#define ppp_dbglog(x) do { if (LWIP_DEBUG_ENABLED(LOG_DEBUG)) { ppp_dbglog_impl x; }} while(0) +#define ppp_info(x) do { if (LWIP_DEBUG_ENABLED(LOG_INFO)) { ppp_info_impl x; }} while(0) +#define ppp_notice(x) do { if (LWIP_DEBUG_ENABLED(LOG_NOTICE)) { ppp_notice_impl x; }} while(0) +#define ppp_warn(x) do { if (LWIP_DEBUG_ENABLED(LOG_WARNING)) { ppp_warn_impl x; }} while(0) +#define ppp_error(x) do { if (LWIP_DEBUG_ENABLED(LOG_ERR)) { ppp_error_impl x; }} while(0) +#define ppp_fatal(x) do { if (LWIP_DEBUG_ENABLED(LOG_CRITICAL)) { ppp_fatal_impl x; }} while(0) +#if PRINTPKT_SUPPORT +void ppp_dump_packet(ppp_pcb *pcb, const char *tag, unsigned char *p, int len); + /* dump packet to debug log if interesting */ +#endif /* PRINTPKT_SUPPORT */ + +/* + * Number of necessary timers analysis. + * + * PPP use at least one timer per each of its protocol, but not all protocols are + * active at the same time, thus the number of necessary timeouts is actually + * lower than enabled protocols. Here is the actual necessary timeouts based + * on code analysis. + * + * Note that many features analysed here are not working at all and are only + * there for a comprehensive analysis of necessary timers in order to prevent + * having to redo that each time we add a feature. + * + * Timer list + * + * | holdoff timeout + * | low level protocol timeout (PPPoE or PPPoL2P) + * | LCP delayed UP + * | LCP retransmit (FSM) + * | LCP Echo timer + * .| PAP or CHAP or EAP authentication + * . | ECP retransmit (FSM) + * . | CCP retransmit (FSM) when MPPE is enabled + * . | CCP retransmit (FSM) when MPPE is NOT enabled + * . | IPCP retransmit (FSM) + * . .| IP6CP retransmit (FSM) + * . . | Idle time limit + * . . | Max connect time + * . . | Max octets + * . . | CCP RACK timeout + * . . . + * PPP_PHASE_DEAD + * PPP_PHASE_HOLDOFF + * | . . . + * PPP_PHASE_INITIALIZE + * | . . . + * PPP_PHASE_ESTABLISH + * | . . . + * |. . . + * | . . + * PPP_PHASE_AUTHENTICATE + * || . . + * PPP_PHASE_NETWORK + * |||| . . + * || ||| . + * PPP_PHASE_RUNNING + * | .||||| + * | . |||| + * PPP_PHASE_TERMINATE + * | . |||| + * PPP_PHASE_NETWORK + * |. . + * PPP_PHASE_ESTABLISH + * PPP_PHASE_DISCONNECT + * PPP_PHASE_DEAD + * + * Alright, PPP basic retransmission and LCP Echo consume one timer. + * 1 + * + * If authentication is enabled one timer is necessary during authentication. + * This timer might still be running up to network phase for any necessary + * rechallenge, mostly for PPP server support. + * 1 + PPP_AUTH_SUPPORT + * + * If ECP is enabled one timer is necessary before IPCP and/or IP6CP, one more + * is necessary if CCP is enabled (only with MPPE support but we don't care much + * up to this detail level). + * 1 + PPP_AUTH_SUPPORT + ECP_SUPPORT + CCP_SUPPORT + * + * If CCP is enabled it might consume a timer during IPCP or IP6CP, thus + * we might use AUTH, IPCP, IP6CP and CCP timers simultaneously. + * 1 + PPP_AUTH_SUPPORT + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT + * + * When entering running phase, IPCP or IP6CP is still running. If idle time limit + * is enabled one more timer is necessary. Same for max connect time and max + * octets features. Furthermore CCP RACK might be used past this point. + * 1 + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT -1 + PPP_IDLETIMELIMIT + PPP_MAXCONNECT + MAXOCTETS + CCP_SUPPORT + * + * Then the maximum number of simultaneously running timers is given by: + * 1 + MAX(PPP_AUTH_SUPPORT + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT, + * PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT -1 + PPP_IDLETIMELIMIT + PPP_MAXCONNECT + MAXOCTETS + CCP_SUPPORT) + * + * We don't support ECP_SUPPORT + PPP_IDLETIMELIMIT + PPP_MAXCONNECT + MAXOCTETS features + * and adding those defines to ppp_opts.h just for having the value always defined to 0 + * is not worth it, thus reducing the overall complexity. + * 1 + MAX(PPP_AUTH_SUPPORT + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT, + * PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT -1 + CCP_SUPPORT) + * + * PPP_AUTH_SUPPORT is not available in ppp_opts.h because it is defined later in ppp.h, + * but we do not need to be that picky about the real number of simultaneously running + * timers so we just set the base number of timeouts to 2, thus the following is enough + * for now. + * 2 + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT + */ + +#ifdef __cplusplus +} +#endif + +#endif /* PPP_SUPPORT */ +#endif /* LWIP_HDR_PPP_IMPL_H */ diff --git a/lib/lwip/include/netif/ppp/ppp_opts.h b/lib/lwip/include/netif/ppp/ppp_opts.h new file mode 100644 index 0000000000..be22c4ce25 --- /dev/null +++ b/lib/lwip/include/netif/ppp/ppp_opts.h @@ -0,0 +1,610 @@ +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#ifndef LWIP_PPP_OPTS_H +#define LWIP_PPP_OPTS_H + +#include "lwip/opt.h" + +/** + * PPP_SUPPORT==1: Enable PPP. + */ +#ifndef PPP_SUPPORT +#define PPP_SUPPORT 0 +#endif + +/** + * PPPOE_SUPPORT==1: Enable PPP Over Ethernet + */ +#ifndef PPPOE_SUPPORT +#define PPPOE_SUPPORT 0 +#endif + +/** + * PPPOE_SCNAME_SUPPORT==1: Enable PPP Over Ethernet Service Name and Concentrator Name support + */ +#ifndef PPPOE_SCNAME_SUPPORT +#define PPPOE_SCNAME_SUPPORT 0 +#endif + +/** + * PPPOL2TP_SUPPORT==1: Enable PPP Over L2TP + */ +#ifndef PPPOL2TP_SUPPORT +#define PPPOL2TP_SUPPORT 0 +#endif + +/** + * PPPOL2TP_AUTH_SUPPORT==1: Enable PPP Over L2TP Auth (enable MD5 support) + */ +#ifndef PPPOL2TP_AUTH_SUPPORT +#define PPPOL2TP_AUTH_SUPPORT PPPOL2TP_SUPPORT +#endif + +/** + * PPPOS_SUPPORT==1: Enable PPP Over Serial + */ +#ifndef PPPOS_SUPPORT +#define PPPOS_SUPPORT PPP_SUPPORT +#endif + +/** + * LWIP_PPP_API==1: Enable PPP API (in pppapi.c) + */ +#ifndef LWIP_PPP_API +#define LWIP_PPP_API (PPP_SUPPORT && (NO_SYS == 0)) +#endif + +#if PPP_SUPPORT + +/** + * MEMP_NUM_PPP_PCB: the number of simultaneously active PPP + * connections (requires the PPP_SUPPORT option) + */ +#ifndef MEMP_NUM_PPP_PCB +#define MEMP_NUM_PPP_PCB 1 +#endif + +/** + * PPP_NUM_TIMEOUTS_PER_PCB: the number of sys_timeouts running in parallel per + * ppp_pcb. See the detailed explanation at the end of ppp_impl.h about simultaneous + * timers analysis. + */ +#ifndef PPP_NUM_TIMEOUTS_PER_PCB +#define PPP_NUM_TIMEOUTS_PER_PCB (2 + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT) +#endif + +/* The number of sys_timeouts required for the PPP module */ +#define PPP_NUM_TIMEOUTS (PPP_SUPPORT * PPP_NUM_TIMEOUTS_PER_PCB * MEMP_NUM_PPP_PCB) + +/** + * MEMP_NUM_PPPOS_INTERFACES: the number of concurrently active PPPoS + * interfaces (only used with PPPOS_SUPPORT==1) + */ +#ifndef MEMP_NUM_PPPOS_INTERFACES +#define MEMP_NUM_PPPOS_INTERFACES MEMP_NUM_PPP_PCB +#endif + +/** + * MEMP_NUM_PPPOE_INTERFACES: the number of concurrently active PPPoE + * interfaces (only used with PPPOE_SUPPORT==1) + */ +#ifndef MEMP_NUM_PPPOE_INTERFACES +#define MEMP_NUM_PPPOE_INTERFACES 1 +#endif + +/** + * MEMP_NUM_PPPOL2TP_INTERFACES: the number of concurrently active PPPoL2TP + * interfaces (only used with PPPOL2TP_SUPPORT==1) + */ +#ifndef MEMP_NUM_PPPOL2TP_INTERFACES +#define MEMP_NUM_PPPOL2TP_INTERFACES 1 +#endif + +/** + * MEMP_NUM_PPP_API_MSG: Number of concurrent PPP API messages (in pppapi.c) + */ +#ifndef MEMP_NUM_PPP_API_MSG +#define MEMP_NUM_PPP_API_MSG 5 +#endif + +/** + * PPP_DEBUG: Enable debugging for PPP. + */ +#ifndef PPP_DEBUG +#define PPP_DEBUG LWIP_DBG_OFF +#endif + +/** + * PPP_INPROC_IRQ_SAFE==1 call pppos_input() using tcpip_callback(). + * + * Please read the "PPPoS input path" chapter in the PPP documentation about this option. + */ +#ifndef PPP_INPROC_IRQ_SAFE +#define PPP_INPROC_IRQ_SAFE 0 +#endif + +/** + * PRINTPKT_SUPPORT==1: Enable PPP print packet support + * + * Mandatory for debugging, it displays exchanged packet content in debug trace. + */ +#ifndef PRINTPKT_SUPPORT +#define PRINTPKT_SUPPORT 0 +#endif + +/** + * PPP_IPV4_SUPPORT==1: Enable PPP IPv4 support + */ +#ifndef PPP_IPV4_SUPPORT +#define PPP_IPV4_SUPPORT (LWIP_IPV4) +#endif + +/** + * PPP_IPV6_SUPPORT==1: Enable PPP IPv6 support + */ +#ifndef PPP_IPV6_SUPPORT +#define PPP_IPV6_SUPPORT (LWIP_IPV6) +#endif + +/** + * PPP_NOTIFY_PHASE==1: Support PPP notify phase support + * + * PPP notify phase support allows you to set a callback which is + * called on change of the internal PPP state machine. + * + * This can be used for example to set a LED pattern depending on the + * current phase of the PPP session. + */ +#ifndef PPP_NOTIFY_PHASE +#define PPP_NOTIFY_PHASE 0 +#endif + +/** + * PPP_FCS_TABLE: Keep a 256*2 byte table to speed up FCS calculation for PPPoS + */ +#ifndef PPP_FCS_TABLE +#define PPP_FCS_TABLE 1 +#endif + +/** + * PAP_SUPPORT==1: Support PAP. + */ +#ifndef PAP_SUPPORT +#define PAP_SUPPORT 0 +#endif + +/** + * CHAP_SUPPORT==1: Support CHAP. + */ +#ifndef CHAP_SUPPORT +#define CHAP_SUPPORT 0 +#endif + +/** + * MSCHAP_SUPPORT==1: Support MSCHAP. + */ +#ifndef MSCHAP_SUPPORT +#define MSCHAP_SUPPORT 0 +#endif +#if MSCHAP_SUPPORT +/* MSCHAP requires CHAP support */ +#undef CHAP_SUPPORT +#define CHAP_SUPPORT 1 +#endif /* MSCHAP_SUPPORT */ + +/** + * EAP_SUPPORT==1: Support EAP. + */ +#ifndef EAP_SUPPORT +#define EAP_SUPPORT 0 +#endif + +/** + * CCP_SUPPORT==1: Support CCP. + */ +#ifndef CCP_SUPPORT +#define CCP_SUPPORT 0 +#endif + +/** + * MPPE_SUPPORT==1: Support MPPE. + */ +#ifndef MPPE_SUPPORT +#define MPPE_SUPPORT 0 +#endif +#if MPPE_SUPPORT +/* MPPE requires CCP support */ +#undef CCP_SUPPORT +#define CCP_SUPPORT 1 +/* MPPE requires MSCHAP support */ +#undef MSCHAP_SUPPORT +#define MSCHAP_SUPPORT 1 +/* MSCHAP requires CHAP support */ +#undef CHAP_SUPPORT +#define CHAP_SUPPORT 1 +#endif /* MPPE_SUPPORT */ + +/** + * CBCP_SUPPORT==1: Support CBCP. CURRENTLY NOT SUPPORTED! DO NOT SET! + */ +#ifndef CBCP_SUPPORT +#define CBCP_SUPPORT 0 +#endif + +/** + * ECP_SUPPORT==1: Support ECP. CURRENTLY NOT SUPPORTED! DO NOT SET! + */ +#ifndef ECP_SUPPORT +#define ECP_SUPPORT 0 +#endif + +/** + * DEMAND_SUPPORT==1: Support dial on demand. CURRENTLY NOT SUPPORTED! DO NOT SET! + */ +#ifndef DEMAND_SUPPORT +#define DEMAND_SUPPORT 0 +#endif + +/** + * LQR_SUPPORT==1: Support Link Quality Report. Do nothing except exchanging some LCP packets. + */ +#ifndef LQR_SUPPORT +#define LQR_SUPPORT 0 +#endif + +/** + * PPP_SERVER==1: Enable PPP server support (waiting for incoming PPP session). + * + * Currently only supported for PPPoS. + */ +#ifndef PPP_SERVER +#define PPP_SERVER 0 +#endif + +#if PPP_SERVER +/* + * PPP_OUR_NAME: Our name for authentication purposes + */ +#ifndef PPP_OUR_NAME +#define PPP_OUR_NAME "lwIP" +#endif +#endif /* PPP_SERVER */ + +/** + * VJ_SUPPORT==1: Support VJ header compression. + * + * BEWARE: It is known to be broken when built with some compiler optimizations enabled. + */ +#ifndef VJ_SUPPORT +#define VJ_SUPPORT 0 +#endif +/* VJ compression is only supported for TCP over IPv4 over PPPoS. */ +#if !PPPOS_SUPPORT || !PPP_IPV4_SUPPORT || !LWIP_TCP +#undef VJ_SUPPORT +#define VJ_SUPPORT 0 +#endif /* !PPPOS_SUPPORT */ + +/** + * PPP_MD5_RANDM==1: Use MD5 for better randomness. + * Enabled by default if CHAP, EAP, or L2TP AUTH support is enabled. + */ +#ifndef PPP_MD5_RANDM +#define PPP_MD5_RANDM (CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT) +#endif + +/** + * PolarSSL embedded library + * + * + * lwIP contains some files fetched from the latest BSD release of + * the PolarSSL project (PolarSSL 0.10.1-bsd) for ciphers and encryption + * methods we need for lwIP PPP support. + * + * The PolarSSL files were cleaned to contain only the necessary struct + * fields and functions needed for lwIP. + * + * The PolarSSL API was not changed at all, so if you are already using + * PolarSSL you can choose to skip the compilation of the included PolarSSL + * library into lwIP. + * + * If you are not using the embedded copy you must include external + * libraries into your arch/cc.h port file. + * + * Beware of the stack requirements which can be a lot larger if you are not + * using our cleaned PolarSSL library. + */ + +/** + * LWIP_USE_EXTERNAL_POLARSSL: Use external PolarSSL library + */ +#ifndef LWIP_USE_EXTERNAL_POLARSSL +#define LWIP_USE_EXTERNAL_POLARSSL 0 +#endif + +/** + * LWIP_USE_EXTERNAL_MBEDTLS: Use external mbed TLS library + */ +#ifndef LWIP_USE_EXTERNAL_MBEDTLS +#define LWIP_USE_EXTERNAL_MBEDTLS 0 +#endif + +/* + * PPP Timeouts + */ + +/** + * FSM_DEFTIMEOUT: Timeout time in seconds + */ +#ifndef FSM_DEFTIMEOUT +#define FSM_DEFTIMEOUT 6 +#endif + +/** + * FSM_DEFMAXTERMREQS: Maximum Terminate-Request transmissions + */ +#ifndef FSM_DEFMAXTERMREQS +#define FSM_DEFMAXTERMREQS 2 +#endif + +/** + * FSM_DEFMAXCONFREQS: Maximum Configure-Request transmissions + */ +#ifndef FSM_DEFMAXCONFREQS +#define FSM_DEFMAXCONFREQS 10 +#endif + +/** + * FSM_DEFMAXNAKLOOPS: Maximum number of nak loops + */ +#ifndef FSM_DEFMAXNAKLOOPS +#define FSM_DEFMAXNAKLOOPS 5 +#endif + +/** + * UPAP_DEFTIMEOUT: Timeout (seconds) for retransmitting req + */ +#ifndef UPAP_DEFTIMEOUT +#define UPAP_DEFTIMEOUT 6 +#endif + +/** + * UPAP_DEFTRANSMITS: Maximum number of auth-reqs to send + */ +#ifndef UPAP_DEFTRANSMITS +#define UPAP_DEFTRANSMITS 10 +#endif + +#if PPP_SERVER +/** + * UPAP_DEFREQTIME: Time to wait for auth-req from peer + */ +#ifndef UPAP_DEFREQTIME +#define UPAP_DEFREQTIME 30 +#endif +#endif /* PPP_SERVER */ + +/** + * CHAP_DEFTIMEOUT: Timeout (seconds) for retransmitting req + */ +#ifndef CHAP_DEFTIMEOUT +#define CHAP_DEFTIMEOUT 6 +#endif + +/** + * CHAP_DEFTRANSMITS: max # times to send challenge + */ +#ifndef CHAP_DEFTRANSMITS +#define CHAP_DEFTRANSMITS 10 +#endif + +#if PPP_SERVER +/** + * CHAP_DEFRECHALLENGETIME: If this option is > 0, rechallenge the peer every n seconds + */ +#ifndef CHAP_DEFRECHALLENGETIME +#define CHAP_DEFRECHALLENGETIME 0 +#endif +#endif /* PPP_SERVER */ + +/** + * EAP_DEFREQTIME: Time to wait for peer request + */ +#ifndef EAP_DEFREQTIME +#define EAP_DEFREQTIME 6 +#endif + +/** + * EAP_DEFALLOWREQ: max # times to accept requests + */ +#ifndef EAP_DEFALLOWREQ +#define EAP_DEFALLOWREQ 10 +#endif + +#if PPP_SERVER +/** + * EAP_DEFTIMEOUT: Timeout (seconds) for rexmit + */ +#ifndef EAP_DEFTIMEOUT +#define EAP_DEFTIMEOUT 6 +#endif + +/** + * EAP_DEFTRANSMITS: max # times to transmit + */ +#ifndef EAP_DEFTRANSMITS +#define EAP_DEFTRANSMITS 10 +#endif +#endif /* PPP_SERVER */ + +/** + * LCP_DEFLOOPBACKFAIL: Default number of times we receive our magic number from the peer + * before deciding the link is looped-back. + */ +#ifndef LCP_DEFLOOPBACKFAIL +#define LCP_DEFLOOPBACKFAIL 10 +#endif + +/** + * LCP_ECHOINTERVAL: Interval in seconds between keepalive echo requests, 0 to disable. + */ +#ifndef LCP_ECHOINTERVAL +#define LCP_ECHOINTERVAL 0 +#endif + +/** + * LCP_MAXECHOFAILS: Number of unanswered echo requests before failure. + */ +#ifndef LCP_MAXECHOFAILS +#define LCP_MAXECHOFAILS 3 +#endif + +/** + * PPP_MAXIDLEFLAG: Max Xmit idle time (in ms) before resend flag char. + */ +#ifndef PPP_MAXIDLEFLAG +#define PPP_MAXIDLEFLAG 100 +#endif + +/** + * PPP Packet sizes + */ + +/** + * PPP_MRU: MRU value we want to negotiate (peer MTU) + * + * It only affects PPPoS because PPPoE value is derived from the + * Ethernet interface MTU and PPPoL2TP have a separate setting. + */ +#ifndef PPP_MRU +#define PPP_MRU 1500 +#endif + +/** + * PPP_MAXMRU: Normally limit peer MRU to this + * + * This is the upper limit value to which we set our interface MTU. + * If the peer sends a larger number, we will just ignore it as we + * are not required to maximize the use of the peer capacity. + * + * It only affects PPPoS because PPPoE value is derived from the + * Ethernet interface MTU and PPPoL2TP have a separate setting. + */ +#ifndef PPP_MAXMRU +#define PPP_MAXMRU 1500 +#endif + +/** + * PPP_MINMRU: No peer MRUs below this + * + * Peer must be able to receive at least our minimum MTU. + */ +#ifndef PPP_MINMRU +#define PPP_MINMRU 128 +#endif + +/** + * PPPOL2TP_DEFMRU: Default MTU and MRU for L2TP + * Default = 1500 - PPPoE(6) - PPP Protocol(2) - IPv4 header(20) - UDP Header(8) + * - L2TP Header(6) - HDLC Header(2) - PPP Protocol(2) - MPPE Header(2) - PPP Protocol(2) + */ +#if PPPOL2TP_SUPPORT +#ifndef PPPOL2TP_DEFMRU +#define PPPOL2TP_DEFMRU 1450 +#endif +#endif /* PPPOL2TP_SUPPORT */ + +/** + * MAXNAMELEN: max length of hostname or name for auth + */ +#ifndef MAXNAMELEN +#define MAXNAMELEN 256 +#endif + +/** + * MAXSECRETLEN: max length of password or secret + */ +#ifndef MAXSECRETLEN +#define MAXSECRETLEN 256 +#endif + +/* ------------------------------------------------------------------------- */ + +/* + * Build triggers for embedded PolarSSL + */ +#if !LWIP_USE_EXTERNAL_POLARSSL && !LWIP_USE_EXTERNAL_MBEDTLS + +/* CHAP, EAP, L2TP AUTH and MD5 Random require MD5 support */ +#if CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT || PPP_MD5_RANDM +#define LWIP_INCLUDED_POLARSSL_MD5 1 +#endif /* CHAP_SUPPORT || EAP_SUPPORT || PPPOL2TP_AUTH_SUPPORT || PPP_MD5_RANDM */ + +#if MSCHAP_SUPPORT + +/* MSCHAP require MD4 support */ +#define LWIP_INCLUDED_POLARSSL_MD4 1 +/* MSCHAP require SHA1 support */ +#define LWIP_INCLUDED_POLARSSL_SHA1 1 +/* MSCHAP require DES support */ +#define LWIP_INCLUDED_POLARSSL_DES 1 + +/* MS-CHAP support is required for MPPE */ +#if MPPE_SUPPORT +/* MPPE require ARC4 support */ +#define LWIP_INCLUDED_POLARSSL_ARC4 1 +#endif /* MPPE_SUPPORT */ + +#endif /* MSCHAP_SUPPORT */ + +#endif /* !LWIP_USE_EXTERNAL_POLARSSL && !LWIP_USE_EXTERNAL_MBEDTLS */ + +/* Default value if unset */ +#ifndef LWIP_INCLUDED_POLARSSL_MD4 +#define LWIP_INCLUDED_POLARSSL_MD4 0 +#endif /* LWIP_INCLUDED_POLARSSL_MD4 */ +#ifndef LWIP_INCLUDED_POLARSSL_MD5 +#define LWIP_INCLUDED_POLARSSL_MD5 0 +#endif /* LWIP_INCLUDED_POLARSSL_MD5 */ +#ifndef LWIP_INCLUDED_POLARSSL_SHA1 +#define LWIP_INCLUDED_POLARSSL_SHA1 0 +#endif /* LWIP_INCLUDED_POLARSSL_SHA1 */ +#ifndef LWIP_INCLUDED_POLARSSL_DES +#define LWIP_INCLUDED_POLARSSL_DES 0 +#endif /* LWIP_INCLUDED_POLARSSL_DES */ +#ifndef LWIP_INCLUDED_POLARSSL_ARC4 +#define LWIP_INCLUDED_POLARSSL_ARC4 0 +#endif /* LWIP_INCLUDED_POLARSSL_ARC4 */ + +#endif /* PPP_SUPPORT */ + +/* Default value if unset */ +#ifndef PPP_NUM_TIMEOUTS +#define PPP_NUM_TIMEOUTS 0 +#endif /* PPP_NUM_TIMEOUTS */ + +#endif /* LWIP_PPP_OPTS_H */ diff --git a/lib/lwip/include/netif/ppp/pppapi.h b/lib/lwip/include/netif/ppp/pppapi.h new file mode 100644 index 0000000000..913d93f749 --- /dev/null +++ b/lib/lwip/include/netif/ppp/pppapi.h @@ -0,0 +1,137 @@ +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#ifndef LWIP_PPPAPI_H +#define LWIP_PPPAPI_H + +#include "netif/ppp/ppp_opts.h" + +#if LWIP_PPP_API /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/sys.h" +#include "lwip/netif.h" +#include "lwip/priv/tcpip_priv.h" +#include "netif/ppp/ppp.h" +#if PPPOS_SUPPORT +#include "netif/ppp/pppos.h" +#endif /* PPPOS_SUPPORT */ + +#ifdef __cplusplus +extern "C" { +#endif + +struct pppapi_msg_msg { + ppp_pcb *ppp; + union { +#if PPP_NOTIFY_PHASE + struct { + ppp_notify_phase_cb_fn notify_phase_cb; + } setnotifyphasecb; +#endif /* PPP_NOTIFY_PHASE */ +#if PPPOS_SUPPORT + struct { + struct netif *pppif; + pppos_output_cb_fn output_cb; + ppp_link_status_cb_fn link_status_cb; + void *ctx_cb; + } serialcreate; +#endif /* PPPOS_SUPPORT */ +#if PPPOE_SUPPORT + struct { + struct netif *pppif; + struct netif *ethif; + const char *service_name; + const char *concentrator_name; + ppp_link_status_cb_fn link_status_cb; + void *ctx_cb; + } ethernetcreate; +#endif /* PPPOE_SUPPORT */ +#if PPPOL2TP_SUPPORT + struct { + struct netif *pppif; + struct netif *netif; + API_MSG_M_DEF_C(ip_addr_t, ipaddr); + u16_t port; +#if PPPOL2TP_AUTH_SUPPORT + const u8_t *secret; + u8_t secret_len; +#endif /* PPPOL2TP_AUTH_SUPPORT */ + ppp_link_status_cb_fn link_status_cb; + void *ctx_cb; + } l2tpcreate; +#endif /* PPPOL2TP_SUPPORT */ + struct { + u16_t holdoff; + } connect; + struct { + u8_t nocarrier; + } close; + struct { + u8_t cmd; + void *arg; + } ioctl; + } msg; +}; + +struct pppapi_msg { + struct tcpip_api_call_data call; + struct pppapi_msg_msg msg; +}; + +/* API for application */ +err_t pppapi_set_default(ppp_pcb *pcb); +#if PPP_NOTIFY_PHASE +err_t pppapi_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb); +#endif /* PPP_NOTIFY_PHASE */ +#if PPPOS_SUPPORT +ppp_pcb *pppapi_pppos_create(struct netif *pppif, pppos_output_cb_fn output_cb, ppp_link_status_cb_fn link_status_cb, void *ctx_cb); +#endif /* PPPOS_SUPPORT */ +#if PPPOE_SUPPORT +ppp_pcb *pppapi_pppoe_create(struct netif *pppif, struct netif *ethif, const char *service_name, + const char *concentrator_name, ppp_link_status_cb_fn link_status_cb, + void *ctx_cb); +#endif /* PPPOE_SUPPORT */ +#if PPPOL2TP_SUPPORT +ppp_pcb *pppapi_pppol2tp_create(struct netif *pppif, struct netif *netif, ip_addr_t *ipaddr, u16_t port, + const u8_t *secret, u8_t secret_len, + ppp_link_status_cb_fn link_status_cb, void *ctx_cb); +#endif /* PPPOL2TP_SUPPORT */ +err_t pppapi_connect(ppp_pcb *pcb, u16_t holdoff); +#if PPP_SERVER +err_t pppapi_listen(ppp_pcb *pcb); +#endif /* PPP_SERVER */ +err_t pppapi_close(ppp_pcb *pcb, u8_t nocarrier); +err_t pppapi_free(ppp_pcb *pcb); +err_t pppapi_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_PPP_API */ + +#endif /* LWIP_PPPAPI_H */ diff --git a/lib/lwip/include/netif/ppp/pppcrypt.h b/lib/lwip/include/netif/ppp/pppcrypt.h new file mode 100644 index 0000000000..c0230bbcb7 --- /dev/null +++ b/lib/lwip/include/netif/ppp/pppcrypt.h @@ -0,0 +1,144 @@ +/* + * pppcrypt.c - PPP/DES linkage for MS-CHAP and EAP SRP-SHA1 + * + * Extracted from chap_ms.c by James Carlson. + * + * Copyright (c) 1995 Eric Rosenquist. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +/* This header file is included in all PPP modules needing hashes and/or ciphers */ + +#ifndef PPPCRYPT_H +#define PPPCRYPT_H + +/* + * If included PolarSSL copy is not used, user is expected to include + * external libraries in arch/cc.h (which is included by lwip/arch.h). + */ +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Map hashes and ciphers functions to PolarSSL + */ +#if !LWIP_USE_EXTERNAL_MBEDTLS + +#include "netif/ppp/polarssl/md4.h" +#define lwip_md4_context md4_context +#define lwip_md4_init(context) +#define lwip_md4_starts md4_starts +#define lwip_md4_update md4_update +#define lwip_md4_finish md4_finish +#define lwip_md4_free(context) + +#include "netif/ppp/polarssl/md5.h" +#define lwip_md5_context md5_context +#define lwip_md5_init(context) +#define lwip_md5_starts md5_starts +#define lwip_md5_update md5_update +#define lwip_md5_finish md5_finish +#define lwip_md5_free(context) + +#include "netif/ppp/polarssl/sha1.h" +#define lwip_sha1_context sha1_context +#define lwip_sha1_init(context) +#define lwip_sha1_starts sha1_starts +#define lwip_sha1_update sha1_update +#define lwip_sha1_finish sha1_finish +#define lwip_sha1_free(context) + +#include "netif/ppp/polarssl/des.h" +#define lwip_des_context des_context +#define lwip_des_init(context) +#define lwip_des_setkey_enc des_setkey_enc +#define lwip_des_crypt_ecb des_crypt_ecb +#define lwip_des_free(context) + +#include "netif/ppp/polarssl/arc4.h" +#define lwip_arc4_context arc4_context +#define lwip_arc4_init(context) +#define lwip_arc4_setup arc4_setup +#define lwip_arc4_crypt arc4_crypt +#define lwip_arc4_free(context) + +#endif /* !LWIP_USE_EXTERNAL_MBEDTLS */ + +/* + * Map hashes and ciphers functions to mbed TLS + */ +#if LWIP_USE_EXTERNAL_MBEDTLS + +#define lwip_md4_context mbedtls_md4_context +#define lwip_md4_init mbedtls_md4_init +#define lwip_md4_starts mbedtls_md4_starts +#define lwip_md4_update mbedtls_md4_update +#define lwip_md4_finish mbedtls_md4_finish +#define lwip_md4_free mbedtls_md4_free + +#define lwip_md5_context mbedtls_md5_context +#define lwip_md5_init mbedtls_md5_init +#define lwip_md5_starts mbedtls_md5_starts +#define lwip_md5_update mbedtls_md5_update +#define lwip_md5_finish mbedtls_md5_finish +#define lwip_md5_free mbedtls_md5_free + +#define lwip_sha1_context mbedtls_sha1_context +#define lwip_sha1_init mbedtls_sha1_init +#define lwip_sha1_starts mbedtls_sha1_starts +#define lwip_sha1_update mbedtls_sha1_update +#define lwip_sha1_finish mbedtls_sha1_finish +#define lwip_sha1_free mbedtls_sha1_free + +#define lwip_des_context mbedtls_des_context +#define lwip_des_init mbedtls_des_init +#define lwip_des_setkey_enc mbedtls_des_setkey_enc +#define lwip_des_crypt_ecb mbedtls_des_crypt_ecb +#define lwip_des_free mbedtls_des_free + +#define lwip_arc4_context mbedtls_arc4_context +#define lwip_arc4_init mbedtls_arc4_init +#define lwip_arc4_setup mbedtls_arc4_setup +#define lwip_arc4_crypt(context, buffer, length) mbedtls_arc4_crypt(context, length, buffer, buffer) +#define lwip_arc4_free mbedtls_arc4_free + +#endif /* LWIP_USE_EXTERNAL_MBEDTLS */ + +void pppcrypt_56_to_64_bit_key(u_char *key, u_char *des_key); + +#ifdef __cplusplus +} +#endif + +#endif /* PPPCRYPT_H */ + +#endif /* PPP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/pppdebug.h b/lib/lwip/include/netif/ppp/pppdebug.h new file mode 100644 index 0000000000..36ee4f9bf9 --- /dev/null +++ b/lib/lwip/include/netif/ppp/pppdebug.h @@ -0,0 +1,88 @@ +/***************************************************************************** +* pppdebug.h - System debugging utilities. +* +* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. +* portions Copyright (c) 1998 Global Election Systems Inc. +* portions Copyright (c) 2001 by Cognizant Pty Ltd. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY (please don't use tabs!) +* +* 03-01-01 Marc Boucher marc@mbsi.ca +* Ported to lwIP. +* 98-07-29 Guy Lancaster lancasterg@acm.org, Global Election Systems Inc. +* Original. +* +***************************************************************************** +*/ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef PPPDEBUG_H +#define PPPDEBUG_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* Trace levels. */ +#define LOG_CRITICAL (PPP_DEBUG | LWIP_DBG_LEVEL_SEVERE) +#define LOG_ERR (PPP_DEBUG | LWIP_DBG_LEVEL_SEVERE) +#define LOG_NOTICE (PPP_DEBUG | LWIP_DBG_LEVEL_WARNING) +#define LOG_WARNING (PPP_DEBUG | LWIP_DBG_LEVEL_WARNING) +#define LOG_INFO (PPP_DEBUG) +#define LOG_DETAIL (PPP_DEBUG) +#define LOG_DEBUG (PPP_DEBUG) + +#if PPP_DEBUG + +#define MAINDEBUG(a) LWIP_DEBUGF(LWIP_DBG_LEVEL_WARNING, a) +#define SYSDEBUG(a) LWIP_DEBUGF(LWIP_DBG_LEVEL_WARNING, a) +#define FSMDEBUG(a) LWIP_DEBUGF(LWIP_DBG_LEVEL_WARNING, a) +#define LCPDEBUG(a) LWIP_DEBUGF(LWIP_DBG_LEVEL_WARNING, a) +#define IPCPDEBUG(a) LWIP_DEBUGF(LWIP_DBG_LEVEL_WARNING, a) +#define IPV6CPDEBUG(a) LWIP_DEBUGF(LWIP_DBG_LEVEL_WARNING, a) +#define UPAPDEBUG(a) LWIP_DEBUGF(LWIP_DBG_LEVEL_WARNING, a) +#define CHAPDEBUG(a) LWIP_DEBUGF(LWIP_DBG_LEVEL_WARNING, a) +#define PPPDEBUG(a, b) LWIP_DEBUGF(a, b) + +#else /* PPP_DEBUG */ + +#define MAINDEBUG(a) +#define SYSDEBUG(a) +#define FSMDEBUG(a) +#define LCPDEBUG(a) +#define IPCPDEBUG(a) +#define IPV6CPDEBUG(a) +#define UPAPDEBUG(a) +#define CHAPDEBUG(a) +#define PPPDEBUG(a, b) + +#endif /* PPP_DEBUG */ + +#ifdef __cplusplus +} +#endif + +#endif /* PPPDEBUG_H */ + +#endif /* PPP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/pppoe.h b/lib/lwip/include/netif/ppp/pppoe.h new file mode 100644 index 0000000000..8994d38c01 --- /dev/null +++ b/lib/lwip/include/netif/ppp/pppoe.h @@ -0,0 +1,187 @@ +/***************************************************************************** +* pppoe.h - PPP Over Ethernet implementation for lwIP. +* +* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc. +* +* The authors hereby grant permission to use, copy, modify, distribute, +* and license this software and its documentation for any purpose, provided +* that existing copyright notices are retained in all copies and that this +* notice and the following disclaimer are included verbatim in any +* distributions. No written agreement, license, or royalty fee is required +* for any of the authorized uses. +* +* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR +* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +****************************************************************************** +* REVISION HISTORY +* +* 06-01-01 Marc Boucher marc@mbsi.ca +* Ported to lwIP. +*****************************************************************************/ + + + +/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */ + +/*- + * Copyright (c) 2002 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Martin Husemann martin@NetBSD.org. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef PPP_OE_H +#define PPP_OE_H + +#include "ppp.h" +#include "lwip/etharp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct pppoehdr { + PACK_STRUCT_FLD_8(u8_t vertype); + PACK_STRUCT_FLD_8(u8_t code); + PACK_STRUCT_FIELD(u16_t session); + PACK_STRUCT_FIELD(u16_t plen); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct pppoetag { + PACK_STRUCT_FIELD(u16_t tag); + PACK_STRUCT_FIELD(u16_t len); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + + +#define PPPOE_STATE_INITIAL 0 +#define PPPOE_STATE_PADI_SENT 1 +#define PPPOE_STATE_PADR_SENT 2 +#define PPPOE_STATE_SESSION 3 +/* passive */ +#define PPPOE_STATE_PADO_SENT 1 + +#define PPPOE_HEADERLEN sizeof(struct pppoehdr) +#define PPPOE_VERTYPE 0x11 /* VER=1, TYPE = 1 */ + +#define PPPOE_TAG_EOL 0x0000 /* end of list */ +#define PPPOE_TAG_SNAME 0x0101 /* service name */ +#define PPPOE_TAG_ACNAME 0x0102 /* access concentrator name */ +#define PPPOE_TAG_HUNIQUE 0x0103 /* host unique */ +#define PPPOE_TAG_ACCOOKIE 0x0104 /* AC cookie */ +#define PPPOE_TAG_VENDOR 0x0105 /* vendor specific */ +#define PPPOE_TAG_RELAYSID 0x0110 /* relay session id */ +#define PPPOE_TAG_SNAME_ERR 0x0201 /* service name error */ +#define PPPOE_TAG_ACSYS_ERR 0x0202 /* AC system error */ +#define PPPOE_TAG_GENERIC_ERR 0x0203 /* gerneric error */ + +#define PPPOE_CODE_PADI 0x09 /* Active Discovery Initiation */ +#define PPPOE_CODE_PADO 0x07 /* Active Discovery Offer */ +#define PPPOE_CODE_PADR 0x19 /* Active Discovery Request */ +#define PPPOE_CODE_PADS 0x65 /* Active Discovery Session confirmation */ +#define PPPOE_CODE_PADT 0xA7 /* Active Discovery Terminate */ + +#ifndef PPPOE_MAX_AC_COOKIE_LEN +#define PPPOE_MAX_AC_COOKIE_LEN 64 +#endif + +struct pppoe_softc { + struct pppoe_softc *next; + struct netif *sc_ethif; /* ethernet interface we are using */ + ppp_pcb *pcb; /* PPP PCB */ + + struct eth_addr sc_dest; /* hardware address of concentrator */ + u16_t sc_session; /* PPPoE session id */ + u8_t sc_state; /* discovery phase or session connected */ + +#if PPPOE_SCNAME_SUPPORT + const char *sc_service_name; /* if != NULL: requested name of service */ + const char *sc_concentrator_name; /* if != NULL: requested concentrator id */ +#endif /* PPPOE_SCNAME_SUPPORT */ + u8_t sc_ac_cookie[PPPOE_MAX_AC_COOKIE_LEN]; /* content of AC cookie we must echo back */ + u8_t sc_ac_cookie_len; /* length of cookie data */ +#ifdef PPPOE_SERVER + u8_t *sc_hunique; /* content of host unique we must echo back */ + u8_t sc_hunique_len; /* length of host unique */ +#endif + u8_t sc_padi_retried; /* number of PADI retries already done */ + u8_t sc_padr_retried; /* number of PADR retries already done */ +}; + + +#define pppoe_init() /* compatibility define, no initialization needed */ + +ppp_pcb *pppoe_create(struct netif *pppif, + struct netif *ethif, + const char *service_name, const char *concentrator_name, + ppp_link_status_cb_fn link_status_cb, void *ctx_cb); + +/* + * Functions called from lwIP + * DO NOT CALL FROM lwIP USER APPLICATION. + */ +void pppoe_disc_input(struct netif *netif, struct pbuf *p); +void pppoe_data_input(struct netif *netif, struct pbuf *p); + +#ifdef __cplusplus +} +#endif + +#endif /* PPP_OE_H */ + +#endif /* PPP_SUPPORT && PPPOE_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/pppol2tp.h b/lib/lwip/include/netif/ppp/pppol2tp.h new file mode 100644 index 0000000000..1221ca15b7 --- /dev/null +++ b/lib/lwip/include/netif/ppp/pppol2tp.h @@ -0,0 +1,209 @@ +/** + * @file + * Network Point to Point Protocol over Layer 2 Tunneling Protocol header file. + * + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && PPPOL2TP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef PPPOL2TP_H +#define PPPOL2TP_H + +#include "ppp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Timeout */ +#define PPPOL2TP_CONTROL_TIMEOUT (5*1000) /* base for quick timeout calculation */ +#define PPPOL2TP_SLOW_RETRY (60*1000) /* persistent retry interval */ + +#define PPPOL2TP_MAXSCCRQ 4 /* retry SCCRQ four times (quickly) */ +#define PPPOL2TP_MAXICRQ 4 /* retry IRCQ four times */ +#define PPPOL2TP_MAXICCN 4 /* retry ICCN four times */ + +/* L2TP header flags */ +#define PPPOL2TP_HEADERFLAG_CONTROL 0x8000 +#define PPPOL2TP_HEADERFLAG_LENGTH 0x4000 +#define PPPOL2TP_HEADERFLAG_SEQUENCE 0x0800 +#define PPPOL2TP_HEADERFLAG_OFFSET 0x0200 +#define PPPOL2TP_HEADERFLAG_PRIORITY 0x0100 +#define PPPOL2TP_HEADERFLAG_VERSION 0x0002 + +/* Mandatory bits for control: Control, Length, Sequence, Version 2 */ +#define PPPOL2TP_HEADERFLAG_CONTROL_MANDATORY (PPPOL2TP_HEADERFLAG_CONTROL|PPPOL2TP_HEADERFLAG_LENGTH|PPPOL2TP_HEADERFLAG_SEQUENCE|PPPOL2TP_HEADERFLAG_VERSION) +/* Forbidden bits for control: Offset, Priority */ +#define PPPOL2TP_HEADERFLAG_CONTROL_FORBIDDEN (PPPOL2TP_HEADERFLAG_OFFSET|PPPOL2TP_HEADERFLAG_PRIORITY) + +/* Mandatory bits for data: Version 2 */ +#define PPPOL2TP_HEADERFLAG_DATA_MANDATORY (PPPOL2TP_HEADERFLAG_VERSION) + +/* AVP (Attribute Value Pair) header */ +#define PPPOL2TP_AVPHEADERFLAG_MANDATORY 0x8000 +#define PPPOL2TP_AVPHEADERFLAG_HIDDEN 0x4000 +#define PPPOL2TP_AVPHEADERFLAG_LENGTHMASK 0x03ff + +/* -- AVP - Message type */ +#define PPPOL2TP_AVPTYPE_MESSAGE 0 /* Message type */ + +/* Control Connection Management */ +#define PPPOL2TP_MESSAGETYPE_SCCRQ 1 /* Start Control Connection Request */ +#define PPPOL2TP_MESSAGETYPE_SCCRP 2 /* Start Control Connection Reply */ +#define PPPOL2TP_MESSAGETYPE_SCCCN 3 /* Start Control Connection Connected */ +#define PPPOL2TP_MESSAGETYPE_STOPCCN 4 /* Stop Control Connection Notification */ +#define PPPOL2TP_MESSAGETYPE_HELLO 6 /* Hello */ +/* Call Management */ +#define PPPOL2TP_MESSAGETYPE_OCRQ 7 /* Outgoing Call Request */ +#define PPPOL2TP_MESSAGETYPE_OCRP 8 /* Outgoing Call Reply */ +#define PPPOL2TP_MESSAGETYPE_OCCN 9 /* Outgoing Call Connected */ +#define PPPOL2TP_MESSAGETYPE_ICRQ 10 /* Incoming Call Request */ +#define PPPOL2TP_MESSAGETYPE_ICRP 11 /* Incoming Call Reply */ +#define PPPOL2TP_MESSAGETYPE_ICCN 12 /* Incoming Call Connected */ +#define PPPOL2TP_MESSAGETYPE_CDN 14 /* Call Disconnect Notify */ +/* Error reporting */ +#define PPPOL2TP_MESSAGETYPE_WEN 15 /* WAN Error Notify */ +/* PPP Session Control */ +#define PPPOL2TP_MESSAGETYPE_SLI 16 /* Set Link Info */ + +/* -- AVP - Result code */ +#define PPPOL2TP_AVPTYPE_RESULTCODE 1 /* Result code */ +#define PPPOL2TP_RESULTCODE 1 /* General request to clear control connection */ + +/* -- AVP - Protocol version (!= L2TP Header version) */ +#define PPPOL2TP_AVPTYPE_VERSION 2 +#define PPPOL2TP_VERSION 0x0100 /* L2TP Protocol version 1, revision 0 */ + +/* -- AVP - Framing capabilities */ +#define PPPOL2TP_AVPTYPE_FRAMINGCAPABILITIES 3 /* Bearer capabilities */ +#define PPPOL2TP_FRAMINGCAPABILITIES 0x00000003 /* Async + Sync framing */ + +/* -- AVP - Bearer capabilities */ +#define PPPOL2TP_AVPTYPE_BEARERCAPABILITIES 4 /* Bearer capabilities */ +#define PPPOL2TP_BEARERCAPABILITIES 0x00000003 /* Analog + Digital Access */ + +/* -- AVP - Tie breaker */ +#define PPPOL2TP_AVPTYPE_TIEBREAKER 5 + +/* -- AVP - Host name */ +#define PPPOL2TP_AVPTYPE_HOSTNAME 7 /* Host name */ +#define PPPOL2TP_HOSTNAME "lwIP" /* FIXME: make it configurable */ + +/* -- AVP - Vendor name */ +#define PPPOL2TP_AVPTYPE_VENDORNAME 8 /* Vendor name */ +#define PPPOL2TP_VENDORNAME "lwIP" /* FIXME: make it configurable */ + +/* -- AVP - Assign tunnel ID */ +#define PPPOL2TP_AVPTYPE_TUNNELID 9 /* Assign Tunnel ID */ + +/* -- AVP - Receive window size */ +#define PPPOL2TP_AVPTYPE_RECEIVEWINDOWSIZE 10 /* Receive window size */ +#define PPPOL2TP_RECEIVEWINDOWSIZE 8 /* FIXME: make it configurable */ + +/* -- AVP - Challenge */ +#define PPPOL2TP_AVPTYPE_CHALLENGE 11 /* Challenge */ + +/* -- AVP - Cause code */ +#define PPPOL2TP_AVPTYPE_CAUSECODE 12 /* Cause code*/ + +/* -- AVP - Challenge response */ +#define PPPOL2TP_AVPTYPE_CHALLENGERESPONSE 13 /* Challenge response */ +#define PPPOL2TP_AVPTYPE_CHALLENGERESPONSE_SIZE 16 + +/* -- AVP - Assign session ID */ +#define PPPOL2TP_AVPTYPE_SESSIONID 14 /* Assign Session ID */ + +/* -- AVP - Call serial number */ +#define PPPOL2TP_AVPTYPE_CALLSERIALNUMBER 15 /* Call Serial Number */ + +/* -- AVP - Framing type */ +#define PPPOL2TP_AVPTYPE_FRAMINGTYPE 19 /* Framing Type */ +#define PPPOL2TP_FRAMINGTYPE 0x00000001 /* Sync framing */ + +/* -- AVP - TX Connect Speed */ +#define PPPOL2TP_AVPTYPE_TXCONNECTSPEED 24 /* TX Connect Speed */ +#define PPPOL2TP_TXCONNECTSPEED 100000000 /* Connect speed: 100 Mbits/s */ + +/* L2TP Session state */ +#define PPPOL2TP_STATE_INITIAL 0 +#define PPPOL2TP_STATE_SCCRQ_SENT 1 +#define PPPOL2TP_STATE_ICRQ_SENT 2 +#define PPPOL2TP_STATE_ICCN_SENT 3 +#define PPPOL2TP_STATE_DATA 4 + +#define PPPOL2TP_OUTPUT_DATA_HEADER_LEN 6 /* Our data header len */ + +/* + * PPPoL2TP interface control block. + */ +typedef struct pppol2tp_pcb_s pppol2tp_pcb; +struct pppol2tp_pcb_s { + ppp_pcb *ppp; /* PPP PCB */ + u8_t phase; /* L2TP phase */ + struct udp_pcb *udp; /* UDP L2TP Socket */ + struct netif *netif; /* Output interface, used as a default route */ + ip_addr_t remote_ip; /* LNS IP Address */ + u16_t remote_port; /* LNS port */ +#if PPPOL2TP_AUTH_SUPPORT + const u8_t *secret; /* Secret string */ + u8_t secret_len; /* Secret string length */ + u8_t secret_rv[16]; /* Random vector */ + u8_t challenge_hash[16]; /* Challenge response */ + u8_t send_challenge; /* Boolean whether the next sent packet should contains a challenge response */ +#endif /* PPPOL2TP_AUTH_SUPPORT */ + + u16_t tunnel_port; /* Tunnel port */ + u16_t our_ns; /* NS to peer */ + u16_t peer_nr; /* NR from peer */ + u16_t peer_ns; /* Expected NS from peer */ + u16_t source_tunnel_id; /* Tunnel ID assigned by peer */ + u16_t remote_tunnel_id; /* Tunnel ID assigned to peer */ + u16_t source_session_id; /* Session ID assigned by peer */ + u16_t remote_session_id; /* Session ID assigned to peer */ + + u8_t sccrq_retried; /* number of SCCRQ retries already done */ + u8_t icrq_retried; /* number of ICRQ retries already done */ + u8_t iccn_retried; /* number of ICCN retries already done */ +}; + + +/* Create a new L2TP session. */ +ppp_pcb *pppol2tp_create(struct netif *pppif, + struct netif *netif, const ip_addr_t *ipaddr, u16_t port, + const u8_t *secret, u8_t secret_len, + ppp_link_status_cb_fn link_status_cb, void *ctx_cb); + +#ifdef __cplusplus +} +#endif + +#endif /* PPPOL2TP_H */ +#endif /* PPP_SUPPORT && PPPOL2TP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/pppos.h b/lib/lwip/include/netif/ppp/pppos.h new file mode 100644 index 0000000000..f587498dfa --- /dev/null +++ b/lib/lwip/include/netif/ppp/pppos.h @@ -0,0 +1,125 @@ +/** + * @file + * Network Point to Point Protocol over Serial header file. + * + */ + +/* + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && PPPOS_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef PPPOS_H +#define PPPOS_H + +#include "lwip/sys.h" + +#include "ppp.h" +#include "vj.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* PPP packet parser states. Current state indicates operation yet to be + * completed. */ +enum { + PDIDLE = 0, /* Idle state - waiting. */ + PDADDRESS, /* Process address field. */ + PDCONTROL, /* Process control field. */ + PDPROTOCOL1, /* Process protocol field 1. */ + PDPROTOCOL2, /* Process protocol field 2. */ + PDDATA /* Process data byte. */ +}; + +/* PPPoS serial output callback function prototype */ +typedef u32_t (*pppos_output_cb_fn)(ppp_pcb *pcb, const void *data, u32_t len, void *ctx); + +/* + * Extended asyncmap - allows any character to be escaped. + */ +typedef u8_t ext_accm[32]; + +/* + * PPPoS interface control block. + */ +typedef struct pppos_pcb_s pppos_pcb; +struct pppos_pcb_s { + /* -- below are data that will NOT be cleared between two sessions */ + ppp_pcb *ppp; /* PPP PCB */ + pppos_output_cb_fn output_cb; /* PPP serial output callback */ + + /* -- below are data that will be cleared between two sessions + * + * last_xmit must be the first member of cleared members, because it is + * used to know which part must not be cleared. + */ + u32_t last_xmit; /* Time of last transmission. */ + ext_accm out_accm; /* Async-Ctl-Char-Map for output. */ + + /* flags */ + unsigned int open :1; /* Set if PPPoS is open */ + unsigned int pcomp :1; /* Does peer accept protocol compression? */ + unsigned int accomp :1; /* Does peer accept addr/ctl compression? */ + + /* PPPoS rx */ + ext_accm in_accm; /* Async-Ctl-Char-Map for input. */ + struct pbuf *in_head, *in_tail; /* The input packet. */ + u16_t in_protocol; /* The input protocol code. */ + u16_t in_fcs; /* Input Frame Check Sequence value. */ + u8_t in_state; /* The input process state. */ + u8_t in_escaped; /* Escape next character. */ +}; + +/* Create a new PPPoS session. */ +ppp_pcb *pppos_create(struct netif *pppif, pppos_output_cb_fn output_cb, + ppp_link_status_cb_fn link_status_cb, void *ctx_cb); + +#if !NO_SYS && !PPP_INPROC_IRQ_SAFE +/* Pass received raw characters to PPPoS to be decoded through lwIP TCPIP thread. */ +err_t pppos_input_tcpip(ppp_pcb *ppp, const void *s, int l); +#endif /* !NO_SYS && !PPP_INPROC_IRQ_SAFE */ + +/* PPP over Serial: this is the input function to be called for received data. */ +void pppos_input(ppp_pcb *ppp, const void* data, int len); + + +/* + * Functions called from lwIP + * DO NOT CALL FROM lwIP USER APPLICATION. + */ +#if !NO_SYS && !PPP_INPROC_IRQ_SAFE +err_t pppos_input_sys(struct pbuf *p, struct netif *inp); +#endif /* !NO_SYS && !PPP_INPROC_IRQ_SAFE */ + +#ifdef __cplusplus +} +#endif + +#endif /* PPPOS_H */ +#endif /* PPP_SUPPORT && PPPOL2TP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/upap.h b/lib/lwip/include/netif/ppp/upap.h new file mode 100644 index 0000000000..540d981492 --- /dev/null +++ b/lib/lwip/include/netif/ppp/upap.h @@ -0,0 +1,131 @@ +/* + * upap.h - User/Password Authentication Protocol definitions. + * + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: upap.h,v 1.8 2002/12/04 23:03:33 paulus Exp $ + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && PAP_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef UPAP_H +#define UPAP_H + +#include "ppp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Packet header = Code, id, length. + */ +#define UPAP_HEADERLEN 4 + + +/* + * UPAP codes. + */ +#define UPAP_AUTHREQ 1 /* Authenticate-Request */ +#define UPAP_AUTHACK 2 /* Authenticate-Ack */ +#define UPAP_AUTHNAK 3 /* Authenticate-Nak */ + + +/* + * Client states. + */ +#define UPAPCS_INITIAL 0 /* Connection down */ +#define UPAPCS_CLOSED 1 /* Connection up, haven't requested auth */ +#define UPAPCS_PENDING 2 /* Connection down, have requested auth */ +#define UPAPCS_AUTHREQ 3 /* We've sent an Authenticate-Request */ +#define UPAPCS_OPEN 4 /* We've received an Ack */ +#define UPAPCS_BADAUTH 5 /* We've received a Nak */ + +/* + * Server states. + */ +#define UPAPSS_INITIAL 0 /* Connection down */ +#define UPAPSS_CLOSED 1 /* Connection up, haven't requested auth */ +#define UPAPSS_PENDING 2 /* Connection down, have requested auth */ +#define UPAPSS_LISTEN 3 /* Listening for an Authenticate */ +#define UPAPSS_OPEN 4 /* We've sent an Ack */ +#define UPAPSS_BADAUTH 5 /* We've sent a Nak */ + + +/* + * Timeouts. + */ +#if 0 /* moved to ppp_opts.h */ +#define UPAP_DEFTIMEOUT 3 /* Timeout (seconds) for retransmitting req */ +#define UPAP_DEFREQTIME 30 /* Time to wait for auth-req from peer */ +#endif /* moved to ppp_opts.h */ + +/* + * Each interface is described by upap structure. + */ +#if PAP_SUPPORT +typedef struct upap_state { + const char *us_user; /* User */ + u8_t us_userlen; /* User length */ + const char *us_passwd; /* Password */ + u8_t us_passwdlen; /* Password length */ + u8_t us_clientstate; /* Client state */ +#if PPP_SERVER + u8_t us_serverstate; /* Server state */ +#endif /* PPP_SERVER */ + u8_t us_id; /* Current id */ + u8_t us_transmits; /* Number of auth-reqs sent */ +} upap_state; +#endif /* PAP_SUPPORT */ + + +void upap_authwithpeer(ppp_pcb *pcb, const char *user, const char *password); +#if PPP_SERVER +void upap_authpeer(ppp_pcb *pcb); +#endif /* PPP_SERVER */ + +extern const struct protent pap_protent; + +#ifdef __cplusplus +} +#endif + +#endif /* UPAP_H */ +#endif /* PPP_SUPPORT && PAP_SUPPORT */ diff --git a/lib/lwip/include/netif/ppp/vj.h b/lib/lwip/include/netif/ppp/vj.h new file mode 100644 index 0000000000..4e6601c1bc --- /dev/null +++ b/lib/lwip/include/netif/ppp/vj.h @@ -0,0 +1,169 @@ +/* + * Definitions for tcp compression routines. + * + * $Id: vj.h,v 1.7 2010/02/22 17:52:09 goldsimon Exp $ + * + * Copyright (c) 1989 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: + * - Initial distribution. + */ + +#include "netif/ppp/ppp_opts.h" +#if PPP_SUPPORT && VJ_SUPPORT /* don't build if not configured for use in lwipopts.h */ + +#ifndef VJ_H +#define VJ_H + +#include "lwip/ip.h" +#include "lwip/priv/tcp_priv.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define MAX_SLOTS 16 /* must be > 2 and < 256 */ +#define MAX_HDR 128 + +/* + * Compressed packet format: + * + * The first octet contains the packet type (top 3 bits), TCP + * 'push' bit, and flags that indicate which of the 4 TCP sequence + * numbers have changed (bottom 5 bits). The next octet is a + * conversation number that associates a saved IP/TCP header with + * the compressed packet. The next two octets are the TCP checksum + * from the original datagram. The next 0 to 15 octets are + * sequence number changes, one change per bit set in the header + * (there may be no changes and there are two special cases where + * the receiver implicitly knows what changed -- see below). + * + * There are 5 numbers which can change (they are always inserted + * in the following order): TCP urgent pointer, window, + * acknowlegement, sequence number and IP ID. (The urgent pointer + * is different from the others in that its value is sent, not the + * change in value.) Since typical use of SLIP links is biased + * toward small packets (see comments on MTU/MSS below), changes + * use a variable length coding with one octet for numbers in the + * range 1 - 255 and 3 octets (0, MSB, LSB) for numbers in the + * range 256 - 65535 or 0. (If the change in sequence number or + * ack is more than 65535, an uncompressed packet is sent.) + */ + +/* + * Packet types (must not conflict with IP protocol version) + * + * The top nibble of the first octet is the packet type. There are + * three possible types: IP (not proto TCP or tcp with one of the + * control flags set); uncompressed TCP (a normal IP/TCP packet but + * with the 8-bit protocol field replaced by an 8-bit connection id -- + * this type of packet syncs the sender & receiver); and compressed + * TCP (described above). + * + * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and + * is logically part of the 4-bit "changes" field that follows. Top + * three bits are actual packet type. For backward compatibility + * and in the interest of conserving bits, numbers are chosen so the + * IP protocol version number (4) which normally appears in this nibble + * means "IP packet". + */ + +/* packet types */ +#define TYPE_IP 0x40 +#define TYPE_UNCOMPRESSED_TCP 0x70 +#define TYPE_COMPRESSED_TCP 0x80 +#define TYPE_ERROR 0x00 + +/* Bits in first octet of compressed packet */ +#define NEW_C 0x40 /* flag bits for what changed in a packet */ +#define NEW_I 0x20 +#define NEW_S 0x08 +#define NEW_A 0x04 +#define NEW_W 0x02 +#define NEW_U 0x01 + +/* reserved, special-case values of above */ +#define SPECIAL_I (NEW_S|NEW_W|NEW_U) /* echoed interactive traffic */ +#define SPECIAL_D (NEW_S|NEW_A|NEW_W|NEW_U) /* unidirectional data */ +#define SPECIALS_MASK (NEW_S|NEW_A|NEW_W|NEW_U) + +#define TCP_PUSH_BIT 0x10 + + +/* + * "state" data for each active tcp conversation on the wire. This is + * basically a copy of the entire IP/TCP header from the last packet + * we saw from the conversation together with a small identifier + * the transmit & receive ends of the line use to locate saved header. + */ +struct cstate { + struct cstate *cs_next; /* next most recently used state (xmit only) */ + u16_t cs_hlen; /* size of hdr (receive only) */ + u8_t cs_id; /* connection # associated with this state */ + u8_t cs_filler; + union { + char csu_hdr[MAX_HDR]; + struct ip_hdr csu_ip; /* ip/tcp hdr from most recent packet */ + } vjcs_u; +}; +#define cs_ip vjcs_u.csu_ip +#define cs_hdr vjcs_u.csu_hdr + + +struct vjstat { + u32_t vjs_packets; /* outbound packets */ + u32_t vjs_compressed; /* outbound compressed packets */ + u32_t vjs_searches; /* searches for connection state */ + u32_t vjs_misses; /* times couldn't find conn. state */ + u32_t vjs_uncompressedin; /* inbound uncompressed packets */ + u32_t vjs_compressedin; /* inbound compressed packets */ + u32_t vjs_errorin; /* inbound unknown type packets */ + u32_t vjs_tossed; /* inbound packets tossed because of error */ +}; + +/* + * all the state data for one serial line (we need one of these per line). + */ +struct vjcompress { + struct cstate *last_cs; /* most recently used tstate */ + u8_t last_recv; /* last rcvd conn. id */ + u8_t last_xmit; /* last sent conn. id */ + u16_t flags; + u8_t maxSlotIndex; + u8_t compressSlot; /* Flag indicating OK to compress slot ID. */ +#if LINK_STATS + struct vjstat stats; +#endif + struct cstate tstate[MAX_SLOTS]; /* xmit connection states */ + struct cstate rstate[MAX_SLOTS]; /* receive connection states */ +}; + +/* flag values */ +#define VJF_TOSS 1U /* tossing rcvd frames because of input err */ + +extern void vj_compress_init (struct vjcompress *comp); +extern u8_t vj_compress_tcp (struct vjcompress *comp, struct pbuf **pb); +extern void vj_uncompress_err (struct vjcompress *comp); +extern int vj_uncompress_uncomp(struct pbuf *nb, struct vjcompress *comp); +extern int vj_uncompress_tcp (struct pbuf **nb, struct vjcompress *comp); + +#ifdef __cplusplus +} +#endif + +#endif /* VJ_H */ + +#endif /* PPP_SUPPORT && VJ_SUPPORT */ diff --git a/lib/lwip/include/netif/slipif.h b/lib/lwip/include/netif/slipif.h new file mode 100644 index 0000000000..46d2010115 --- /dev/null +++ b/lib/lwip/include/netif/slipif.h @@ -0,0 +1,86 @@ +/** + * @file + * + * SLIP netif API + */ + +/* + * Copyright (c) 2001, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels adam@sics.se + * + */ +#ifndef LWIP_HDR_NETIF_SLIPIF_H +#define LWIP_HDR_NETIF_SLIPIF_H + +#include "lwip/opt.h" +#include "lwip/netif.h" + +/** Set this to 1 to start a thread that blocks reading on the serial line + * (using sio_read()). + */ +#ifndef SLIP_USE_RX_THREAD +#define SLIP_USE_RX_THREAD !NO_SYS +#endif + +/** Set this to 1 to enable functions to pass in RX bytes from ISR context. + * If enabled, slipif_received_byte[s]() process incoming bytes and put assembled + * packets on a queue, which is fed into lwIP from slipif_poll(). + * If disabled, slipif_poll() polls the serial line (using sio_tryread()). + */ +#ifndef SLIP_RX_FROM_ISR +#define SLIP_RX_FROM_ISR 0 +#endif + +/** Set this to 1 (default for SLIP_RX_FROM_ISR) to queue incoming packets + * received by slipif_received_byte[s]() as long as PBUF_POOL pbufs are available. + * If disabled, packets will be dropped if more than one packet is received. + */ +#ifndef SLIP_RX_QUEUE +#define SLIP_RX_QUEUE SLIP_RX_FROM_ISR +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +err_t slipif_init(struct netif * netif); +void slipif_poll(struct netif *netif); +#if SLIP_RX_FROM_ISR +void slipif_process_rxqueue(struct netif *netif); +void slipif_received_byte(struct netif *netif, u8_t data); +void slipif_received_bytes(struct netif *netif, u8_t *data, u8_t len); +#endif /* SLIP_RX_FROM_ISR */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_NETIF_SLIPIF_H */ diff --git a/lib/lwip/include/netif/zepif.h b/lib/lwip/include/netif/zepif.h new file mode 100644 index 0000000000..2a801b4c40 --- /dev/null +++ b/lib/lwip/include/netif/zepif.h @@ -0,0 +1,81 @@ +/** + * @file + * + * A netif implementing the ZigBee Eencapsulation Protocol (ZEP). + * This is used to tunnel 6LowPAN over UDP. + */ + +/* + * Copyright (c) 2018 Simon Goldschmidt + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Simon Goldschmidt goldsimon@gmx.de + * + */ + +#ifndef LWIP_HDR_ZEPIF_H +#define LWIP_HDR_ZEPIF_H + +#include "lwip/opt.h" +#include "netif/lowpan6.h" + +#if LWIP_IPV6 && LWIP_UDP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define ZEPIF_DEFAULT_UDP_PORT 17754 + +/** Pass this struct as 'state' to netif_add to control the behaviour + * of this netif. If NULL is passed, default behaviour is chosen */ +struct zepif_init { + /** The UDP port used to ZEP frames from (0 = default) */ + u16_t zep_src_udp_port; + /** The UDP port used to ZEP frames to (0 = default) */ + u16_t zep_dst_udp_port; + /** The IP address to sed ZEP frames from (NULL = ANY) */ + const ip_addr_t *zep_src_ip_addr; + /** The IP address to sed ZEP frames to (NULL = BROADCAST) */ + const ip_addr_t *zep_dst_ip_addr; + /** If != NULL, the udp pcb is bound to this netif */ + const struct netif *zep_netif; + /** MAC address of the 6LowPAN device */ + u8_t addr[6]; +}; + +err_t zepif_init(struct netif *netif); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IPV6 && LWIP_UDP */ + +#endif /* LWIP_HDR_ZEPIF_H */ diff --git a/lib/lwip/netif/ethernet.c b/lib/lwip/netif/ethernet.c new file mode 100644 index 0000000000..db5c514b45 --- /dev/null +++ b/lib/lwip/netif/ethernet.c @@ -0,0 +1,329 @@ +/** + * @file + * Ethernet common functions + * + * @defgroup ethernet Ethernet + * @ingroup callbackstyle_api + */ + +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * Copyright (c) 2003-2004 Leon Woestenberg leon.woestenberg@axon.tv + * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + */ + +#include "lwip/opt.h" + +#if LWIP_ARP || LWIP_ETHERNET + +#include "netif/ethernet.h" +#include "lwip/def.h" +#include "lwip/stats.h" +#include "lwip/etharp.h" +#include "lwip/ip.h" +#include "lwip/snmp.h" + +#include <string.h> + +#include "netif/ppp/ppp_opts.h" +#if PPPOE_SUPPORT +#include "netif/ppp/pppoe.h" +#endif /* PPPOE_SUPPORT */ + +#ifdef LWIP_HOOK_FILENAME +#include LWIP_HOOK_FILENAME +#endif + +const struct eth_addr ethbroadcast = {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}; +const struct eth_addr ethzero = {{0, 0, 0, 0, 0, 0}}; + +/** + * @ingroup lwip_nosys + * Process received ethernet frames. Using this function instead of directly + * calling ip_input and passing ARP frames through etharp in ethernetif_input, + * the ARP cache is protected from concurrent access.<br> + * Don't call directly, pass to netif_add() and call netif->input(). + * + * @param p the received packet, p->payload pointing to the ethernet header + * @param netif the network interface on which the packet was received + * + * @see LWIP_HOOK_UNKNOWN_ETH_PROTOCOL + * @see ETHARP_SUPPORT_VLAN + * @see LWIP_HOOK_VLAN_CHECK + */ +err_t +ethernet_input(struct pbuf *p, struct netif *netif) +{ + struct eth_hdr *ethhdr; + u16_t type; +#if LWIP_ARP || ETHARP_SUPPORT_VLAN || LWIP_IPV6 + u16_t next_hdr_offset = SIZEOF_ETH_HDR; +#endif /* LWIP_ARP || ETHARP_SUPPORT_VLAN */ + + LWIP_ASSERT_CORE_LOCKED(); + + if (p->len <= SIZEOF_ETH_HDR) { + /* a packet with only an ethernet header (or less) is not valid for us */ + ETHARP_STATS_INC(etharp.proterr); + ETHARP_STATS_INC(etharp.drop); + MIB2_STATS_NETIF_INC(netif, ifinerrors); + goto free_and_return; + } + + /* points to packet payload, which starts with an Ethernet header */ + ethhdr = (struct eth_hdr *)p->payload; + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, + ("ethernet_input: dest:%"X8_F":%"X8_F":%"X8_F":%"X8_F":%"X8_F":%"X8_F", src:%"X8_F":%"X8_F":%"X8_F":%"X8_F":%"X8_F":%"X8_F", type:%"X16_F"\n", + (unsigned char)ethhdr->dest.addr[0], (unsigned char)ethhdr->dest.addr[1], (unsigned char)ethhdr->dest.addr[2], + (unsigned char)ethhdr->dest.addr[3], (unsigned char)ethhdr->dest.addr[4], (unsigned char)ethhdr->dest.addr[5], + (unsigned char)ethhdr->src.addr[0], (unsigned char)ethhdr->src.addr[1], (unsigned char)ethhdr->src.addr[2], + (unsigned char)ethhdr->src.addr[3], (unsigned char)ethhdr->src.addr[4], (unsigned char)ethhdr->src.addr[5], + lwip_htons(ethhdr->type))); + + type = ethhdr->type; +#if ETHARP_SUPPORT_VLAN + if (type == PP_HTONS(ETHTYPE_VLAN)) { + struct eth_vlan_hdr *vlan = (struct eth_vlan_hdr *)(((char *)ethhdr) + SIZEOF_ETH_HDR); + next_hdr_offset = SIZEOF_ETH_HDR + SIZEOF_VLAN_HDR; + if (p->len <= SIZEOF_ETH_HDR + SIZEOF_VLAN_HDR) { + /* a packet with only an ethernet/vlan header (or less) is not valid for us */ + ETHARP_STATS_INC(etharp.proterr); + ETHARP_STATS_INC(etharp.drop); + MIB2_STATS_NETIF_INC(netif, ifinerrors); + goto free_and_return; + } +#if defined(LWIP_HOOK_VLAN_CHECK) || defined(ETHARP_VLAN_CHECK) || defined(ETHARP_VLAN_CHECK_FN) /* if not, allow all VLANs */ +#ifdef LWIP_HOOK_VLAN_CHECK + if (!LWIP_HOOK_VLAN_CHECK(netif, ethhdr, vlan)) { +#elif defined(ETHARP_VLAN_CHECK_FN) + if (!ETHARP_VLAN_CHECK_FN(ethhdr, vlan)) { +#elif defined(ETHARP_VLAN_CHECK) + if (VLAN_ID(vlan) != ETHARP_VLAN_CHECK) { +#endif + /* silently ignore this packet: not for our VLAN */ + pbuf_free(p); + return ERR_OK; + } +#endif /* defined(LWIP_HOOK_VLAN_CHECK) || defined(ETHARP_VLAN_CHECK) || defined(ETHARP_VLAN_CHECK_FN) */ + type = vlan->tpid; + } +#endif /* ETHARP_SUPPORT_VLAN */ + +#if LWIP_ARP_FILTER_NETIF + netif = LWIP_ARP_FILTER_NETIF_FN(p, netif, lwip_htons(type)); +#endif /* LWIP_ARP_FILTER_NETIF*/ + + if (p->if_idx == NETIF_NO_INDEX) { + p->if_idx = netif_get_index(netif); + } + + if (ethhdr->dest.addr[0] & 1) { + /* this might be a multicast or broadcast packet */ + if (ethhdr->dest.addr[0] == LL_IP4_MULTICAST_ADDR_0) { +#if LWIP_IPV4 + if ((ethhdr->dest.addr[1] == LL_IP4_MULTICAST_ADDR_1) && + (ethhdr->dest.addr[2] == LL_IP4_MULTICAST_ADDR_2)) { + /* mark the pbuf as link-layer multicast */ + p->flags |= PBUF_FLAG_LLMCAST; + } +#endif /* LWIP_IPV4 */ + } +#if LWIP_IPV6 + else if ((ethhdr->dest.addr[0] == LL_IP6_MULTICAST_ADDR_0) && + (ethhdr->dest.addr[1] == LL_IP6_MULTICAST_ADDR_1)) { + /* mark the pbuf as link-layer multicast */ + p->flags |= PBUF_FLAG_LLMCAST; + } +#endif /* LWIP_IPV6 */ + else if (eth_addr_cmp(&ethhdr->dest, &ethbroadcast)) { + /* mark the pbuf as link-layer broadcast */ + p->flags |= PBUF_FLAG_LLBCAST; + } + } + + switch (type) { +#if LWIP_IPV4 && LWIP_ARP + /* IP packet? */ + case PP_HTONS(ETHTYPE_IP): + if (!(netif->flags & NETIF_FLAG_ETHARP)) { + goto free_and_return; + } + /* skip Ethernet header (min. size checked above) */ + if (pbuf_remove_header(p, next_hdr_offset)) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, + ("ethernet_input: IPv4 packet dropped, too short (%"U16_F"/%"U16_F")\n", + p->tot_len, next_hdr_offset)); + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("Can't move over header in packet\n")); + goto free_and_return; + } else { + /* pass to IP layer */ + ip4_input(p, netif); + } + break; + + case PP_HTONS(ETHTYPE_ARP): + if (!(netif->flags & NETIF_FLAG_ETHARP)) { + goto free_and_return; + } + /* skip Ethernet header (min. size checked above) */ + if (pbuf_remove_header(p, next_hdr_offset)) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, + ("ethernet_input: ARP response packet dropped, too short (%"U16_F"/%"U16_F")\n", + p->tot_len, next_hdr_offset)); + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("Can't move over header in packet\n")); + ETHARP_STATS_INC(etharp.lenerr); + ETHARP_STATS_INC(etharp.drop); + goto free_and_return; + } else { + /* pass p to ARP module */ + etharp_input(p, netif); + } + break; +#endif /* LWIP_IPV4 && LWIP_ARP */ +#if PPPOE_SUPPORT + case PP_HTONS(ETHTYPE_PPPOEDISC): /* PPP Over Ethernet Discovery Stage */ + pppoe_disc_input(netif, p); + break; + + case PP_HTONS(ETHTYPE_PPPOE): /* PPP Over Ethernet Session Stage */ + pppoe_data_input(netif, p); + break; +#endif /* PPPOE_SUPPORT */ + +#if LWIP_IPV6 + case PP_HTONS(ETHTYPE_IPV6): /* IPv6 */ + /* skip Ethernet header */ + if ((p->len < next_hdr_offset) || pbuf_remove_header(p, next_hdr_offset)) { + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, + ("ethernet_input: IPv6 packet dropped, too short (%"U16_F"/%"U16_F")\n", + p->tot_len, next_hdr_offset)); + goto free_and_return; + } else { + /* pass to IPv6 layer */ + ip6_input(p, netif); + } + break; +#endif /* LWIP_IPV6 */ + + default: +#ifdef LWIP_HOOK_UNKNOWN_ETH_PROTOCOL + if (LWIP_HOOK_UNKNOWN_ETH_PROTOCOL(p, netif) == ERR_OK) { + break; + } +#endif + ETHARP_STATS_INC(etharp.proterr); + ETHARP_STATS_INC(etharp.drop); + MIB2_STATS_NETIF_INC(netif, ifinunknownprotos); + goto free_and_return; + } + + /* This means the pbuf is freed or consumed, + so the caller doesn't have to free it again */ + return ERR_OK; + +free_and_return: + pbuf_free(p); + return ERR_OK; +} + +/** + * @ingroup ethernet + * Send an ethernet packet on the network using netif->linkoutput(). + * The ethernet header is filled in before sending. + * + * @see LWIP_HOOK_VLAN_SET + * + * @param netif the lwIP network interface on which to send the packet + * @param p the packet to send. pbuf layer must be @ref PBUF_LINK. + * @param src the source MAC address to be copied into the ethernet header + * @param dst the destination MAC address to be copied into the ethernet header + * @param eth_type ethernet type (@ref lwip_ieee_eth_type) + * @return ERR_OK if the packet was sent, any other err_t on failure + */ +err_t +ethernet_output(struct netif * netif, struct pbuf * p, + const struct eth_addr * src, const struct eth_addr * dst, + u16_t eth_type) { + struct eth_hdr *ethhdr; + u16_t eth_type_be = lwip_htons(eth_type); + +#if ETHARP_SUPPORT_VLAN && (defined(LWIP_HOOK_VLAN_SET) || LWIP_VLAN_PCP) + s32_t vlan_prio_vid; +#ifdef LWIP_HOOK_VLAN_SET + vlan_prio_vid = LWIP_HOOK_VLAN_SET(netif, p, src, dst, eth_type); +#elif LWIP_VLAN_PCP + vlan_prio_vid = -1; + if (netif->hints && (netif->hints->tci >= 0)) { + vlan_prio_vid = (u16_t)netif->hints->tci; + } +#endif + if (vlan_prio_vid >= 0) { + struct eth_vlan_hdr *vlanhdr; + + LWIP_ASSERT("prio_vid must be <= 0xFFFF", vlan_prio_vid <= 0xFFFF); + + if (pbuf_add_header(p, SIZEOF_ETH_HDR + SIZEOF_VLAN_HDR) != 0) { + goto pbuf_header_failed; + } + vlanhdr = (struct eth_vlan_hdr *)(((u8_t *)p->payload) + SIZEOF_ETH_HDR); + vlanhdr->tpid = eth_type_be; + vlanhdr->prio_vid = lwip_htons((u16_t)vlan_prio_vid); + + eth_type_be = PP_HTONS(ETHTYPE_VLAN); + } else +#endif /* ETHARP_SUPPORT_VLAN && (defined(LWIP_HOOK_VLAN_SET) || LWIP_VLAN_PCP) */ + { + if (pbuf_add_header(p, SIZEOF_ETH_HDR) != 0) { + goto pbuf_header_failed; + } + } + + LWIP_ASSERT_CORE_LOCKED(); + + ethhdr = (struct eth_hdr *)p->payload; + ethhdr->type = eth_type_be; + SMEMCPY(&ethhdr->dest, dst, ETH_HWADDR_LEN); + SMEMCPY(&ethhdr->src, src, ETH_HWADDR_LEN); + + LWIP_ASSERT("netif->hwaddr_len must be 6 for ethernet_output!", + (netif->hwaddr_len == ETH_HWADDR_LEN)); + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, + ("ethernet_output: sending packet %p\n", (void *)p)); + + /* send the packet */ + return netif->linkoutput(netif, p); + +pbuf_header_failed: + LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, + ("ethernet_output: could not allocate room for header.\n")); + LINK_STATS_INC(link.lenerr); + return ERR_BUF; +} + +#endif /* LWIP_ARP || LWIP_ETHERNET */ diff --git a/lib/lwip/u-boot/arch/cc.h b/lib/lwip/u-boot/arch/cc.h new file mode 100644 index 0000000000..31c036dc0c --- /dev/null +++ b/lib/lwip/u-boot/arch/cc.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2023 Linaro Ltd. maxim.uvarov@linaro.org */ + +#ifndef LWIP_ARCH_CC_H +#define LWIP_ARCH_CC_H + +#include <linux/types.h> +#include <linux/kernel.h> +#include <vsprintf.h> +#include <rand.h> + +#define LWIP_ERRNO_INCLUDE <errno.h> + +#define LWIP_ERRNO_STDINCLUDE 1 +#define LWIP_NO_UNISTD_H 1 +#define LWIP_TIMEVAL_PRIVATE 1 + +#ifdef CONFIG_LIB_RAND +#define LWIP_RAND() ((u32_t)rand()) +#endif + +/* different handling for unit test, normally not needed */ +#ifdef LWIP_NOASSERT_ON_ERROR +#define LWIP_ERROR(message, expression, handler) do { if (!(expression)) { \ + handler; }} while (0) +#endif + +#define LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS + +#define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion "%s" failed at line %d in %s\n", \ + x, __LINE__, __FILE__); } while (0) + +#define atoi(str) (int)dectoul(str, NULL) +#define lwip_strnstr(a, b) strnstr(a, b) + +#define LWIP_ERR_T int +#define LWIP_CONST_CAST(target_type, val) ((target_type)((uintptr_t)val)) + +#if defined(CONFIG_SYS_BIG_ENDIAN) +#define BYTE_ORDER BIG_ENDIAN +#endif + +#endif /* LWIP_ARCH_CC_H */ diff --git a/lib/lwip/u-boot/arch/sys_arch.h b/lib/lwip/u-boot/arch/sys_arch.h new file mode 100644 index 0000000000..e69de29bb2 diff --git a/lib/lwip/u-boot/limits.h b/lib/lwip/u-boot/limits.h new file mode 100644 index 0000000000..e69de29bb2 diff --git a/lib/lwip/u-boot/lwipopts.h b/lib/lwip/u-boot/lwipopts.h new file mode 100644 index 0000000000..aac0a6259f --- /dev/null +++ b/lib/lwip/u-boot/lwipopts.h @@ -0,0 +1,197 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +/* Copyright (C) 2023 Linaro Ltd. maxim.uvarov@linaro.org */ + +#ifndef LWIP_UBOOT_LWIPOPTS_H +#define LWIP_UBOOT_LWIPOPTS_H + +#if defined(CONFIG_LWIP_DEBUG) +#define LWIP_DEBUG 1 +#define LWIP_DBG_MIN_LEVEL LWIP_DBG_LEVEL_ALL +#define LWIP_DBG_TYPES_ON LWIP_DBG_ON +#define ETHARP_DEBUG LWIP_DBG_ON +#define NETIF_DEBUG LWIP_DBG_ON +#define PBUF_DEBUG LWIP_DBG_OFF +#define API_LIB_DEBUG LWIP_DBG_ON +#define API_MSG_DEBUG LWIP_DBG_OFF +#define SOCKETS_DEBUG LWIP_DBG_OFF +#define ICMP_DEBUG LWIP_DBG_OFF +#define IGMP_DEBUG LWIP_DBG_OFF +#define INET_DEBUG LWIP_DBG_OFF +#define IP_DEBUG LWIP_DBG_ON +#define IP_REASS_DEBUG LWIP_DBG_OFF +#define RAW_DEBUG LWIP_DBG_OFF +#define MEM_DEBUG LWIP_DBG_OFF +#define MEMP_DEBUG LWIP_DBG_OFF +#define SYS_DEBUG LWIP_DBG_OFF +#define TIMERS_DEBUG LWIP_DBG_ON +#define TCP_DEBUG LWIP_DBG_OFF +#define TCP_INPUT_DEBUG LWIP_DBG_OFF +#define TCP_FR_DEBUG LWIP_DBG_OFF +#define TCP_RTO_DEBUG LWIP_DBG_OFF +#define TCP_CWND_DEBUG LWIP_DBG_OFF +#define TCP_WND_DEBUG LWIP_DBG_OFF +#define TCP_OUTPUT_DEBUG LWIP_DBG_OFF +#define TCP_RST_DEBUG LWIP_DBG_OFF +#define TCP_QLEN_DEBUG LWIP_DBG_OFF +#define UDP_DEBUG LWIP_DBG_OFF +#define TCPIP_DEBUG LWIP_DBG_OFF +#define SLIP_DEBUG LWIP_DBG_OFF +#define DHCP_DEBUG LWIP_DBG_ON +#define AUTOIP_DEBUG LWIP_DBG_ON +#define DNS_DEBUG LWIP_DBG_ON +#define IP6_DEBUG LWIP_DBG_OFF +#define DHCP6_DEBUG LWIP_DBG_OFF +#else +#define LWIP_DBG_MIN_LEVEL LWIP_DBG_LEVEL_ALL +#define LWIP_DBG_TYPES_ON LWIP_DBG_OFF +#define ETHARP_DEBUG LWIP_DBG_OFF +#define NETIF_DEBUG LWIP_DBG_OFF +#define PBUF_DEBUG LWIP_DBG_OFF +#define API_LIB_DEBUG LWIP_DBG_OFF +#define API_MSG_DEBUG LWIP_DBG_OFF +#define SOCKETS_DEBUG LWIP_DBG_OFF +#define ICMP_DEBUG LWIP_DBG_OFF +#define IGMP_DEBUG LWIP_DBG_OFF +#define INET_DEBUG LWIP_DBG_OFF +#define IP_DEBUG LWIP_DBG_OFF +#define IP_REASS_DEBUG LWIP_DBG_OFF +#define RAW_DEBUG LWIP_DBG_OFF +#define MEM_DEBUG LWIP_DBG_OFF +#define MEMP_DEBUG LWIP_DBG_OFF +#define SYS_DEBUG LWIP_DBG_OFF +#define TIMERS_DEBUG LWIP_DBG_OFF +#define TCP_DEBUG LWIP_DBG_OFF +#define TCP_INPUT_DEBUG LWIP_DBG_OFF +#define TCP_FR_DEBUG LWIP_DBG_OFF +#define TCP_RTO_DEBUG LWIP_DBG_OFF +#define TCP_CWND_DEBUG LWIP_DBG_OFF +#define TCP_WND_DEBUG LWIP_DBG_OFF +#define TCP_OUTPUT_DEBUG LWIP_DBG_OFF +#define TCP_RST_DEBUG LWIP_DBG_OFF +#define TCP_QLEN_DEBUG LWIP_DBG_OFF +#define UDP_DEBUG LWIP_DBG_OFF +#define TCPIP_DEBUG LWIP_DBG_OFF +#define SLIP_DEBUG LWIP_DBG_OFF +#define DHCP_DEBUG LWIP_DBG_OFF +#define AUTOIP_DEBUG LWIP_DBG_OFF +#define DNS_DEBUG LWIP_DBG_OFF +#define IP6_DEBUG LWIP_DBG_OFF +#define DHCP6_DEBUG LWIP_DBG_OFF +#endif +#define LWIP_TESTMODE 0 + +#if !defined(CONFIG_LWIP_ASSERT) +#define LWIP_NOASSERT 1 +#define LWIP_ASSERT(message, assertion) +#endif + +#include "lwip/debug.h" + +#define SYS_LIGHTWEIGHT_PROT 0 +#define NO_SYS 1 + +#define LWIP_IPV4 1 +#define LWIP_IPV6 0 + +#define MEM_ALIGNMENT 1 +#define MEM_SIZE 1600 + +#define MEMP_NUM_PBUF 4 +#define MEMP_NUM_RAW_PCB 2 +#define MEMP_NUM_UDP_PCB 4 +#define MEMP_NUM_TCP_PCB 2 +#define MEMP_NUM_TCP_PCB_LISTEN 2 +#define MEMP_NUM_TCP_SEG 16 +#define MEMP_NUM_REASSDATA 1 +#define MEMP_NUM_ARP_QUEUE 2 +#define MEMP_NUM_SYS_TIMEOUT 4 +#define MEMP_NUM_NETBUF 2 +#define MEMP_NUM_NETCONN 32 +#define MEMP_NUM_TCPIP_MSG_API 8 +#define MEMP_NUM_TCPIP_MSG_INPKT 8 +#define PBUF_POOL_SIZE 8 + +#define LWIP_ARP 1 +#define ARP_TABLE_SIZE 1 +#define ARP_QUEUEING 0 + +#define IP_FORWARD 0 +#define IP_OPTIONS_ALLOWED 1 +#define IP_REASSEMBLY 0 +#define IP_FRAG 0 +#define IP_REASS_MAXAGE 3 +#define IP_REASS_MAX_PBUFS 4 +#define IP_FRAG_USES_STATIC_BUF 0 + +#define IP_DEFAULT_TTL 255 + +#define LWIP_ICMP 0 + +#if defined(CONFIG_PROT_RAW_LWIP) +#define LWIP_RAW 1 +#else +#define LWIP_RAW 0 +#endif + +#if defined(CONFIG_PROT_DHCP_LWIP) +#define LWIP_DHCP 1 +#define LWIP_DHCP_BOOTP_FILE 1 +#else +#define LWIP_DHCP 0 +#endif + +#define LWIP_DHCP_DOES_ACD_CHECK 0 + +#define LWIP_AUTOIP 0 + +#define LWIP_SNMP 0 + +#define LWIP_IGMP 0 + +#if defined(CONFIG_PROT_DNS_LWIP) +#define LWIP_DNS 1 +#define DNS_TABLE_SIZE 1 +#else +#define LWIP_DNS 0 +#endif + +#if defined(CONFIG_PROT_UDP_LWIP) +#define LWIP_UDP 1 +#else +#define LWIP_UDP 0 +#endif + +#if defined(CONFIG_PROT_TCP_LWIP) +#define LWIP_TCP 1 +#else +#define LWIP_TCP 0 +#endif + +#define LWIP_LISTEN_BACKLOG 0 + +#define PBUF_LINK_HLEN 14 +#define PBUF_POOL_BUFSIZE LWIP_MEM_ALIGN_SIZE(TCP_MSS + 40 + PBUF_LINK_HLEN) + +#define LWIP_HAVE_LOOPIF 0 + +#define LWIP_NETCONN 0 +#define LWIP_DISABLE_MEMP_SANITY_CHECKS 1 + +#define LWIP_SOCKET 0 +#define SO_REUSE 0 + +#define LWIP_STATS 0 + +#define PPP_SUPPORT 0 + +#define LWIP_TCPIP_CORE_LOCKING 0 + +#define LWIP_NETIF_LOOPBACK 0 + +/* use malloc instead of pool */ +#define MEMP_MEM_MALLOC 1 +#define MEMP_MEM_INIT 1 +#define MEM_LIBC_MALLOC 1 + +#endif /* LWIP_UBOOT_LWIPOPTS_H */ diff --git a/net-lwip/Kconfig b/net-lwip/Kconfig index f8e0481964..87ce51ca8b 100644 --- a/net-lwip/Kconfig +++ b/net-lwip/Kconfig @@ -12,4 +12,42 @@ menuconfig NET_LWIP depend on CONFIG_NET (such as cmd/net.c enabled via CONFIG_CMD_NET). Therefore the two symbols CONFIG_NET and CONFIG_NET_LWIP are mutually exclusive. - NOTE: This is currently a placeholder. + NOTE: This currently only builds the lwIP library but does not add + any functionality to U-Boot. + +if NET_LWIP + +config LWIP_DEBUG + bool "Enable debug traces in the lwIP library" + +config LWIP_ASSERT + bool "Enable assertions in the lwIP library" + +config PROT_DHCP_LWIP + bool "DHCP support in lwIP" + depends on PROT_UDP_LWIP + help + Enable support for the DHCP protocol in lwIP. + +config PROT_DNS_LWIP + bool "DNS support in lwIP" + depends on PROT_UDP_LWIP + help + Enable support for the DNS protocol in lwIP. + +config PROT_RAW_LWIP + bool "Raw IP API in lwIP" + help + Enable support for the raw IP API in lwIP. + +config PROT_TCP_LWIP + bool "TCP support in lwIP" + help + Enable support for the Transmission Control Protocol in lwIP. + +config PROT_UDP_LWIP + bool "UDP support in lwIP" + help + Enable support for the User Datagram Protocol in lwIP. + +endif