X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fipv4%2Fnetfilter%2Fip_conntrack_proto_tcp.c;h=e0dc370635459a499ebfd725a5a87842830addac;hb=987b0145d94eecf292d8b301228356f44611ab7c;hp=062b252b58ad2f7e581cb61a350cbd39b23ecf06;hpb=e6a27dba1cf83d871b2dfcd64f04f12a67e3f4d5;p=linux-2.6.git

diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
index 062b252b5..e0dc37063 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
@@ -870,8 +870,11 @@ static int tcp_error(struct sk_buff *skb,
 	 * and moreover root might send raw packets.
 	 */
 	/* FIXME: Source route IP option packets --RR */
-	if (hooknum == NF_IP_PRE_ROUTING &&
-	    nf_ip_checksum(skb, hooknum, iph->ihl * 4, IPPROTO_TCP)) {
+	if (hooknum == NF_IP_PRE_ROUTING
+	    && skb->ip_summed != CHECKSUM_UNNECESSARY
+	    && csum_tcpudp_magic(iph->saddr, iph->daddr, tcplen, IPPROTO_TCP,
+			         skb->ip_summed == CHECKSUM_HW ? skb->csum
+			      	 : skb_checksum(skb, iph->ihl*4, tcplen, 0))) {
 		if (LOG_INVALID(IPPROTO_TCP))
 			nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
 				  "ip_ct_tcp: bad TCP checksum ");