u-boot ping功能的实现

 

 

 

static int do_ping(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
    if (argc < 2)
        return CMD_RET_USAGE;

    net_ping_ip = string_to_ip(argv[1]);
    if (net_ping_ip.s_addr == 0)
        return CMD_RET_USAGE;

    if (net_loop(PING) < 0) {
        printf("ping failed; host %s is not alive\n", argv[1]);
        return CMD_RET_FAILURE;
    }

    printf("host %s is alive\n", argv[1]);

    return CMD_RET_SUCCESS;
}

U_BOOT_CMD(
    ping,    2,    1,    do_ping,
    "send ICMP ECHO_REQUEST to network host",
    "pingAddress"
);