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

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Signed-off-by: Keir Fraser <Keir.Fraser@xl.cam.ac.uk>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Keir Fraser 2005-06-21 14:03:23 -07:00 committed by David S. Miller
parent 97216c799a
commit e3be8ba792
1 changed files with 1 additions and 0 deletions
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net/ipv4/netfilter/ip_conntrack_proto_udp.c
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@ -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))) {