U-Boot recently got support for an alternative network stack using LWIP. Replace ping command with the LWIP variant while keeping the output and error messages identical. ping uses lwIP contrib/apps/ping/ping.c code. Custom timeout is used to get an error message on not modified example.
There is pending lwip patch: https://lists.nongnu.org/archive/html/lwip-devel/2023-09/msg00004.html https://savannah.nongnu.org/bugs/?64697 Once applied, more clean way can be used, to unset pending timers and exit from the ping application: net/lwip/apps/ping/ping.h: #define PING_RESULT(cond) { \ .. - raw_remove(pcb); \ + ping_destroy(); \
Signed-off-by: Maxim Uvarov maxim.uvarov@linaro.org --- include/net/lwip.h | 15 +++++++++++++ net/lwip/Makefile | 1 + net/lwip/apps/ping/Makefile | 12 +++++++++++ net/lwip/apps/ping/lwip_ping.c | 39 ++++++++++++++++++++++++++++++++++ net/lwip/apps/ping/lwip_ping.h | 15 +++++++++++++ net/lwip/apps/ping/ping.h | 27 +++++++++++++++++++++++ 6 files changed, 109 insertions(+) create mode 100644 net/lwip/apps/ping/Makefile create mode 100644 net/lwip/apps/ping/lwip_ping.c create mode 100644 net/lwip/apps/ping/lwip_ping.h create mode 100644 net/lwip/apps/ping/ping.h
diff --git a/include/net/lwip.h b/include/net/lwip.h index 85f08343fd..1e92f9871c 100644 --- a/include/net/lwip.h +++ b/include/net/lwip.h @@ -2,6 +2,8 @@
int do_lwip_dns(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); +int do_lwip_ping(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]);
/** * ulwip_dns() - creates the DNS request to resolve a domain host name @@ -56,3 +58,16 @@ int ulwip_tftp(ulong addr, const char *filename); * Returns: 0 for success, !0 if error */ int ulwip_wget(ulong addr, char *url); + +/** + * ulwip_ping - create the ping request + * + * This function creates the ping for address provided in parameters. + * After this function you need to invoke the polling + * loop to process network communication. + * + * + * @ping_addr: IP address to ping + * Returns: 0 for success, !0 if error +*/ +int ulwip_ping(char *ping_addr); diff --git a/net/lwip/Makefile b/net/lwip/Makefile index 61042862e1..5839d125c2 100644 --- a/net/lwip/Makefile +++ b/net/lwip/Makefile @@ -67,3 +67,4 @@ obj-y += apps/dhcp/lwip-dhcp.o obj-y += apps/dns/lwip-dns.o obj-y += apps/tftp/ obj-y += apps/http/ +obj-y += apps/ping/ diff --git a/net/lwip/apps/ping/Makefile b/net/lwip/apps/ping/Makefile new file mode 100644 index 0000000000..e567c0dc3e --- /dev/null +++ b/net/lwip/apps/ping/Makefile @@ -0,0 +1,12 @@ +ccflags-y += -I$(srctree)/net/lwip/port/include +ccflags-y += -I$(srctree)/net/lwip/lwip-external/src/include -I$(srctree)/net/lwip +ccflags-y += -I$(obj) + +# ping.c includes "ping.h", copy it to local directory, to override ping.h +.PHONY: $(obj)/ping.c +$(obj)/ping.o: $(obj)/ping.c +$(obj)/ping.c: + cp $(srctree)/net/lwip/lwip-external/contrib/apps/ping/ping.c $(obj)/ping.c + +obj-y += ping.o +obj-y += lwip_ping.o diff --git a/net/lwip/apps/ping/lwip_ping.c b/net/lwip/apps/ping/lwip_ping.c new file mode 100644 index 0000000000..ba02e7ed47 --- /dev/null +++ b/net/lwip/apps/ping/lwip_ping.c @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * (C) Copyright 2023 Linaro Ltd. maxim.uvarov@linaro.org + */ + +#include "lwip/opt.h" +#include "lwip/ip_addr.h" +#include "lwip/timeouts.h" +#include <linux/errno.h> +#include "ping.h" +#include "lwip_ping.h" + +#define PING_WAIT_MS 5000 + +static ip_addr_t ip_target; + +void ping_tmo(void *arg) +{ + log_err("ping_tmo: ping failed; host %s is not alive\n", + ipaddr_ntoa(&ip_target)); + ulwip_exit(1); +} + +int ulwip_ping(char *ping_addr) +{ + int err; + + err = ipaddr_aton(ping_addr, &ip_target); + if (!err) + return -ENOENT; + + sys_timeout(PING_WAIT_MS, ping_tmo, NULL); + + ping_init(&ip_target); + ping_send_now(); + + return 0; +} diff --git a/net/lwip/apps/ping/lwip_ping.h b/net/lwip/apps/ping/lwip_ping.h new file mode 100644 index 0000000000..0374f07d9e --- /dev/null +++ b/net/lwip/apps/ping/lwip_ping.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +/* + * (C) Copyright 2023 Linaro Ltd. maxim.uvarov@linaro.org + */ + +#ifndef LWIP_PING_H +#define LWIP_PING_H + +#include <lwip/ip_addr.h> + +void ping_raw_init(void); +void ping_send_now(void); + +#endif /* LWIP_PING_H */ diff --git a/net/lwip/apps/ping/ping.h b/net/lwip/apps/ping/ping.h new file mode 100644 index 0000000000..5dd631f2f7 --- /dev/null +++ b/net/lwip/apps/ping/ping.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include <net/ulwip.h> +#include "lwip/ip_addr.h" + +void ping_tmo(void *arg); + +#define LWIP_DEBUG 1 /* ping_time is under ifdef*/ +#define PING_RESULT(cond) { \ + if (cond == 1) { \ + printf("host %s a alive\n", ipaddr_ntoa(addr)); \ + printf(" %"U32_F" ms\n", (sys_now() - ping_time)); \ + raw_remove(pcb); \ + sys_untimeout(ping_tmo, NULL); \ + sys_check_timeouts(); \ + ulwip_exit(0); \ + } else { \ + printf("ping failed; host %s in not alive\n",\ + ipaddr_ntoa(addr)); \ + raw_remove(pcb); \ + sys_untimeout(ping_tmo, NULL); \ + sys_check_timeouts(); \ + ulwip_exit(-1); \ + } \ + } while (0); + +void ping_init(const ip_addr_t *ping_addr);