From 31da185d8162ae0f30a13ed945f1f4d28d158133 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Tue, 3 May 2005 14:23:50 -0700 Subject: [PATCH] [NETFILTER]: Don't checksum CHECKSUM_UNNECESSARY skbs in TCP connection tracking Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/netfilter/ip_conntrack_proto_tcp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c index 2b87c1974b..721ddbf522 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c @@ -819,6 +819,7 @@ static int tcp_error(struct sk_buff *skb, */ /* FIXME: Source route IP option packets --RR */ 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))) { -- 2.39.5