From 5c901daaea3be0d900b3ae1fc9b5f64ff94e4f02 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Fri, 6 Jan 2006 23:05:36 -0800 Subject: [NETFILTER]: Redo policy lookups after NAT when neccessary When NAT changes the key used for the xfrm lookup it needs to be done again. If a new policy is returned in POST_ROUTING the packet needs to be passed to xfrm4_output_one manually after all hooks were called because POST_ROUTING is called with fixed okfn (ip_finish_output). Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/ip_output.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'net/ipv4/ip_output.c') diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 8b1c9bd0091e..59fdac3a099a 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -202,6 +202,11 @@ static inline int ip_finish_output2(struct sk_buff *skb) static inline int ip_finish_output(struct sk_buff *skb) { +#if defined(CONFIG_NETFILTER) && defined(CONFIG_XFRM) + /* Policy lookup after SNAT yielded a new policy */ + if (skb->dst->xfrm != NULL) + return xfrm4_output_finish(skb); +#endif if (skb->len > dst_mtu(skb->dst) && !(skb_shinfo(skb)->ufo_size || skb_shinfo(skb)->tso_size)) return ip_fragment(skb, ip_finish_output2); -- cgit v1.2.2