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Commit 31da185d authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
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[NETFILTER]: Don't checksum CHECKSUM_UNNECESSARY skbs in TCP connection tracking 



Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b4330957

net/ipv4/netfilter/ip_conntrack_proto_tcp.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -819,6 +819,7 @@ static int tcp_error(struct sk_buff *skb, 
	 */

	 */

	/* FIXME: Source route IP option packets --RR */

	/* FIXME: Source route IP option packets --RR */

	if (hooknum == NF_IP_PRE_ROUTING

	if (hooknum == NF_IP_PRE_ROUTING

	    && skb->ip_summed != CHECKSUM_UNNECESSARY

	    && csum_tcpudp_magic(iph->saddr, iph->daddr, tcplen, IPPROTO_TCP,

	    && csum_tcpudp_magic(iph->saddr, iph->daddr, tcplen, IPPROTO_TCP,

			         skb->ip_summed == CHECKSUM_HW ? skb->csum

			         skb->ip_summed == CHECKSUM_HW ? skb->csum

			      	 : skb_checksum(skb, iph->ihl*4, tcplen, 0))) {

			      	 : skb_checksum(skb, iph->ihl*4, tcplen, 0))) {