diff options
| -rw-r--r-- | include/net.h | 4 | ||||
| -rw-r--r-- | net/net.c | 25 | ||||
| -rw-r--r-- | net/ping.c | 10 |
3 files changed, 6 insertions, 33 deletions
diff --git a/include/net.h b/include/net.h index 73ea88b..43e3d28 100644 --- a/include/net.h +++ b/include/net.h @@ -512,10 +512,6 @@ unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum); */ int ip_checksum_ok(const void *addr, unsigned nbytes); -/* Checksum */ -extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */ -extern uint NetCksum(uchar *, int); /* Calculate the checksum */ - /* Callbacks */ extern rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */ extern void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */ @@ -1086,7 +1086,7 @@ NetReceive(uchar *inpkt, int len) if ((ip->ip_hl_v & 0x0f) > 0x05) return; /* Check the Checksum of the header */ - if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) { + if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) { debug("checksum bad\n"); return; } @@ -1291,27 +1291,6 @@ common: /**********************************************************************/ int -NetCksumOk(uchar *ptr, int len) -{ - return !((NetCksum(ptr, len) + 1) & 0xfffe); -} - - -unsigned -NetCksum(uchar *ptr, int len) -{ - ulong xsum; - ushort *p = (ushort *)ptr; - - xsum = 0; - while (len-- > 0) - xsum += *p++; - xsum = (xsum & 0xffff) + (xsum >> 16); - xsum = (xsum & 0xffff) + (xsum >> 16); - return xsum & 0xffff; -} - -int NetEthHdrSize(void) { ushort myvlanid; @@ -1410,7 +1389,7 @@ void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport, net_set_ip_header(pkt, dest, NetOurIP); ip->ip_len = htons(IP_UDP_HDR_SIZE + len); ip->ip_p = IPPROTO_UDP; - ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1); + ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE); ip->udp_src = htons(sport); ip->udp_dst = htons(dport); @@ -29,14 +29,14 @@ static void set_icmp_header(uchar *pkt, IPaddr_t dest) ip->ip_len = htons(IP_ICMP_HDR_SIZE); ip->ip_p = IPPROTO_ICMP; - ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1); + ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE); icmp->type = ICMP_ECHO_REQUEST; icmp->code = 0; icmp->checksum = 0; icmp->un.echo.id = 0; icmp->un.echo.sequence = htons(PingSeqNo++); - icmp->checksum = ~NetCksum((uchar *)icmp, ICMP_HDR_SIZE >> 1); + icmp->checksum = compute_ip_checksum(icmp, ICMP_HDR_SIZE); } static int ping_send(void) @@ -101,13 +101,11 @@ void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len) 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 >> 1); + ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE); icmph->type = ICMP_ECHO_REPLY; icmph->checksum = 0; - icmph->checksum = ~NetCksum((uchar *)icmph, - (len - IP_HDR_SIZE) >> 1); + icmph->checksum = compute_ip_checksum(icmph, len - IP_HDR_SIZE); NetSendPacket((uchar *)et, eth_hdr_size + len); return; /* default: |