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authorKeir Fraser <Keir.Fraser@xl.cam.ac.uk>2005-06-21 14:03:23 -0700
committerDavid S. Miller <davem@davemloft.net>2005-06-21 14:03:23 -0700
commite3be8ba79294df5de96692411e122506b40c5aa4 (patch)
tree85021ea2b3ecc698bc356fa15d873199a40d83d8 /net
parent97216c799a6496163be8c81c9ceed297d92956c5 (diff)
downloadlinux-e3be8ba79294df5de96692411e122506b40c5aa4.tar.bz2
[NETFILTER]: Avoid unncessary checksum validation in UDP connection tracking
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>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/ip_conntrack_proto_udp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_udp.c b/net/ipv4/netfilter/ip_conntrack_proto_udp.c
index 5bc28a224623..8c1eaba098d4 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_udp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_udp.c
@@ -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))) {