Add support for the the ping command with NET_LWIP. The implementation is derived from lwIP's contrib/apps/ping/ping.c.
Signed-off-by: Jerome Forissier jerome.forissier@linaro.org --- cmd/Kconfig | 11 +-- cmd/net-lwip.c | 8 ++ include/net-lwip.h | 1 + net/lwip/Makefile | 1 + net/lwip/ping.c | 177 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 193 insertions(+), 5 deletions(-) create mode 100644 net/lwip/ping.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index fd841cd4e53..844f3d25c4e 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -2000,11 +2000,6 @@ config CMD_WGET wget is a simple command to download kernel, or other files, from a http server over TCP.
-config CMD_PING - bool "ping" - help - Send ICMP ECHO_REQUEST to network host - config CMD_PING6 bool "ping6" depends on IPV6 @@ -2105,6 +2100,12 @@ config CMD_MDIO The MDIO interface is orthogonal to the MII interface and extends it by adding access to more registers through indirect addressing.
+config CMD_PING + bool "ping" + select PROT_RAW_LWIP if NET_LWIP + help + Send ICMP ECHO_REQUEST to network host + config CMD_TFTPBOOT bool "tftp" select PROT_UDP_LWIP if NET_LWIP diff --git a/cmd/net-lwip.c b/cmd/net-lwip.c index 80f0872bb8f..feed719beef 100644 --- a/cmd/net-lwip.c +++ b/cmd/net-lwip.c @@ -12,6 +12,14 @@ U_BOOT_CMD( ); #endif
+#if defined(CONFIG_CMD_PING) +U_BOOT_CMD( + ping, 2, 1, do_ping, + "send ICMP ECHO_REQUEST to network host", + "pingAddress" +); +#endif + #if defined(CONFIG_CMD_TFTPBOOT) U_BOOT_CMD( tftpboot, 3, 0, do_tftpb, diff --git a/include/net-lwip.h b/include/net-lwip.h index cfd06726577..58640c04a7f 100644 --- a/include/net-lwip.h +++ b/include/net-lwip.h @@ -13,5 +13,6 @@ struct netif *net_lwip_get_netif(void); int net_lwip_rx(struct udevice *udev, struct netif *netif);
int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); +int do_ping(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
#endif /* __NET_LWIP_H__ */ diff --git a/net/lwip/Makefile b/net/lwip/Makefile index 4e92a101ddb..b5af37a9b18 100644 --- a/net/lwip/Makefile +++ b/net/lwip/Makefile @@ -2,4 +2,5 @@ ccflags-y += -I$(srctree)/lib/lwip/lwip/src/include -I$(srctree)/lib/lwip/u-boot
obj-$(CONFIG_$(SPL_)DM_ETH) += net-lwip.o obj-$(CONFIG_CMD_DHCP) += dhcp.o +obj-$(CONFIG_CMD_PING) += ping.o obj-$(CONFIG_CMD_TFTPBOOT) += tftp.o diff --git a/net/lwip/ping.c b/net/lwip/ping.c new file mode 100644 index 00000000000..8dafa25959f --- /dev/null +++ b/net/lwip/ping.c @@ -0,0 +1,177 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (C) 2024 Linaro Ltd. */ + +#include <command.h> +#include <console.h> +#include <dm/device.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <lwip/icmp.h> +#include <lwip/inet_chksum.h> +#include <lwip/raw.h> +#include <lwip/timeouts.h> +#include <net.h> +#include <time.h> + +#define PING_DELAY_MS 1000 +#define PING_COUNT 5 +/* Ping identifier - must fit on a u16_t */ +#define PING_ID 0xAFAF + +struct ping_ctx { + ip_addr_t target; + struct raw_pcb *pcb; + struct icmp_echo_hdr *iecho; + uint16_t seq_num; + bool alive; +}; + +static u8_t ping_recv(void *arg, struct raw_pcb *pcb, struct pbuf *p, + const ip_addr_t *addr) +{ + struct ping_ctx *ctx = arg; + struct icmp_echo_hdr *iecho = ctx->iecho; + + if (addr->addr != ctx->target.addr) + return 0; + + if ((p->tot_len >= (IP_HLEN + sizeof(struct icmp_echo_hdr))) && + pbuf_remove_header(p, IP_HLEN) == 0) { + iecho = (struct icmp_echo_hdr *)p->payload; + + if ((iecho->id == PING_ID) && + (iecho->seqno == lwip_htons(ctx->seq_num))) { + ctx->alive = true; + printf("host %s is alive\n", ipaddr_ntoa(addr)); + pbuf_free(p); + return 1; /* eat the packet */ + } + /* not eaten, restore original packet */ + pbuf_add_header(p, IP_HLEN); + } + + return 0; /* don't eat the packet */ +} + +static int ping_raw_init(struct ping_ctx *ctx) +{ + ctx->pcb = raw_new(IP_PROTO_ICMP); + if (!ctx->pcb) + return -ENOMEM; + + raw_recv(ctx->pcb, ping_recv, ctx); + raw_bind(ctx->pcb, IP_ADDR_ANY); + + return 0; +} + +static void ping_raw_stop(struct ping_ctx *ctx) +{ + if (ctx->pcb) + raw_remove(ctx->pcb); +} + +static void ping_prepare_echo(struct ping_ctx *ctx) +{ + struct icmp_echo_hdr *iecho = ctx->iecho; + + ICMPH_TYPE_SET(iecho, ICMP_ECHO); + ICMPH_CODE_SET(iecho, 0); + iecho->chksum = 0; + iecho->id = PING_ID; + iecho->seqno = lwip_htons(ctx->seq_num); + + iecho->chksum = inet_chksum(iecho, sizeof(*iecho)); +} + +static void ping_send_icmp(struct ping_ctx *ctx) +{ + struct pbuf *p; + size_t ping_size = sizeof(struct icmp_echo_hdr); + + p = pbuf_alloc(PBUF_IP, (u16_t)ping_size, PBUF_RAM); + if (!p) + return; + + if ((p->len == p->tot_len) && !p->next) { + ctx->iecho = (struct icmp_echo_hdr *)p->payload; + ping_prepare_echo(ctx); + raw_sendto(ctx->pcb, p, &ctx->target); + } + + pbuf_free(p); +} + +static void ping_send(void *arg) +{ + struct ping_ctx *ctx = arg; + + ctx->seq_num++; + if (ctx->seq_num <= PING_COUNT) { + ping_send_icmp(ctx); + sys_timeout(PING_DELAY_MS, ping_send, ctx); + } +} + +static int ping_loop(struct udevice *udev, const ip_addr_t* addr) +{ + struct ping_ctx ctx = {}; + struct netif *netif; + int ret; + + netif = net_lwip_new_netif(udev); + if (!netif) + return CMD_RET_FAILURE; + + printf("Using %s device\n", udev->name); + + ret = ping_raw_init(&ctx); + if (ret < 0) { + net_lwip_remove_netif(netif); + return ret; + } + + ctx.target = *addr; + + ping_send(&ctx); + + do { + sys_check_timeouts(); + net_lwip_rx(udev, netif); + if (ctx.alive) + break; + if (ctrlc()) { + printf("\nAbort\n"); + break; + } + } while (ctx.seq_num <= PING_COUNT); + + sys_untimeout(ping_send, &ctx); + ping_raw_stop(&ctx); + + net_lwip_remove_netif(netif); + + if (ctx.alive) + return 0; + + printf("ping failed; host %s is not alive\n", ipaddr_ntoa(addr)); + return -1; +} + +int do_ping(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) +{ + ip_addr_t addr; + + if (argc < 2) + return CMD_RET_USAGE; + + if (!ipaddr_aton(argv[1], &addr)) + return CMD_RET_USAGE; + + eth_set_current(); + + if (ping_loop(eth_get_dev(), &addr) < 0) + return CMD_RET_FAILURE; + + return CMD_RET_SUCCESS; +}