diff options
| author | Stefan Roese <sr@denx.de> | 2005-08-12 20:06:52 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2005-08-12 20:06:52 +0200 |
| commit | 8534bf9ac0c4c37ff684c03189a564f0aae7b076 (patch) | |
| tree | da8eaf34d2d2b5db985bde1b7346fc8b95ba3e3c /net | |
| parent | 5315dfa9d138252d62aa740e6d022e61cde8be04 (diff) | |
Add UPD-Checksum code, fix problem in net.c (return instead of break)
Patch by Reinhard Arlt, 12 Aug 2005
Diffstat (limited to 'net')
| -rw-r--r-- | net/net.c | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/net/net.c b/net/net.c index 5b064956894..787c10af56e 100644 --- a/net/net.c +++ b/net/net.c @@ -1410,7 +1410,7 @@ NetReceive(volatile uchar * inpkt, int len) puts (" ICMP Host Redirect to "); print_IPaddr(icmph->un.gateway); putc(' '); - break; + return; #if (CONFIG_COMMANDS & CFG_CMD_PING) case ICMP_ECHO_REPLY: /* @@ -1418,7 +1418,7 @@ NetReceive(volatile uchar * inpkt, int len) */ /* XXX point to ip packet */ (*packetHandler)((uchar *)ip, 0, 0, 0); - break; + return; #endif default: return; @@ -1427,6 +1427,46 @@ NetReceive(volatile uchar * inpkt, int len) return; } +#ifdef CONFIG_UDP_CHECKSUM + if (ip->udp_xsum != 0) { + ulong xsum; + ushort *sumptr; + ushort sumlen; + + xsum = ip->ip_p; + xsum += (ntohs(ip->udp_len)); + xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; + xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; + xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; + xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; + + sumlen = ntohs(ip->udp_len); + sumptr = (ushort *) &(ip->udp_src); + + while (sumlen > 1) { + ushort sumdata; + + sumdata = *sumptr++; + xsum += ntohs(sumdata); + sumlen -= 2; + } + if (sumlen > 0) { + ushort sumdata; + + sumdata = *(unsigned char *) sumptr; + sumdata = (sumdata << 8) & 0xff00; + xsum += sumdata; + } + while ((xsum >> 16) != 0) { + xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); + } + if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { + printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum)); + return; + } + } +#endif + #ifdef CONFIG_NETCONSOLE nc_input_packet((uchar *)ip +IP_HDR_SIZE, ntohs(ip->udp_dst), |