Add ICMP_ECHO_REQUEST packet support by responding with a ICMP_ECHO_REPLY.
This permits the ping command to test the phy interface when the phy is put in loopback mode (typically by setting register 0 bit 14).
It also allows the port to respond to an external ping when u-boot is processing some other net command (such as tftp). This is useful when tftp appears to hang.
Signed-off-by: Ed Swarthout Ed.Swarthout@freescale.com --- net/net.c | 24 ++++++++++++++++++++++++ 1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/net/net.c b/net/net.c index 1d1c98f..3294380 100644 --- a/net/net.c +++ b/net/net.c @@ -1424,6 +1424,30 @@ NetReceive(volatile uchar * inpkt, int len) /* XXX point to ip packet */ (*packetHandler)((uchar *)ip, 0, 0, 0); return; + + case ICMP_ECHO_REQUEST: + { + int rlen = ETHER_HDR_SIZE + len; + int i; +#ifdef ET_DEBUG + printf ("Got ICMP ECHO REQUEST, return %d bytes \n",rlen); +#endif + memcpy (&et->et_dest[0], &et->et_src[0], 6); + memcpy (&et->et_src[ 0], NetOurEther, 6); + + ip->ip_sum = 0; + ip->ip_off = 0; + NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); + NetCopyIP((void*)&ip->ip_src, &NetOurIP); + ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); + + icmph->type = ICMP_ECHO_REPLY; + icmph->checksum = 0; + icmph->checksum = ~NetCksum((uchar *)icmph, + (len - IP_HDR_SIZE_NO_UDP) >> 1); + (void) eth_send((uchar *)et, rlen); + return; + } #endif default: return;