2 files changed, 6 insertions, 29 deletions

diff --git a/net/net.c b/net/net.c
index 2bea07b..b60ce62 100644
--- a/net/net.c
+++ b/net/net.c
@@ -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);
diff --git a/net/ping.c b/net/ping.c
index 2be56ed..366f518 100644
--- a/net/ping.c
+++ b/net/ping.c
@@ -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: