From e3be8ba79294df5de96692411e122506b40c5aa4 Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Tue, 21 Jun 2005 14:03:23 -0700 Subject: [PATCH] [NETFILTER]: Avoid unncessary checksum validation in UDP connection tracking Signed-off-by: Keir Fraser Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/netfilter/ip_conntrack_proto_udp.c | 1 + 1 file changed, 1 insertion(+) 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))) { -- 2.20.1