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Commit e3be8ba7 authored by Keir Fraser's avatar Keir Fraser Committed by David S. Miller
Browse files

[NETFILTER]: Avoid unncessary checksum validation in UDP connection tracking 



Signed-off-by: default avatarKeir Fraser <Keir.Fraser@xl.cam.ac.uk>
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 97216c79

net/ipv4/netfilter/ip_conntrack_proto_udp.c

+1 −0
Original line number Diff line number Diff line
@@ -120,6 +120,7 @@ static int udp_error(struct sk_buff *skb, enum ip_conntrack_info *ctinfo, 
	 * and moreover root might send raw packets.

	 * 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, udplen, IPPROTO_UDP,

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

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