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xfrm: Accept ESP packets regardless of UDP encapsulation mode

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From: Martin Willi <martin@strongswan.org>

An IPsec node speaking IKEv2 MUST accept incoming UDP encapsulated
ESP packets, even if no NAT situation is detected. This is important
if MOBIKE is in use. Some implementation keep the encapsulation
mode if they move out of a NAT situation.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin Willi 2008-12-04 15:40:17 -08:00 committed by David S. Miller
parent 3f9b766ca7
commit e061b165c7
1 changed files with 0 additions and 5 deletions
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5
net/xfrm/xfrm_input.c
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@ -167,11 +167,6 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
goto drop_unlock;
}
if ((x->encap ? x->encap->encap_type : 0) != encap_type) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMISMATCH);
goto drop_unlock;
}
if (x->props.replay_window && xfrm_replay_check(x, skb, seq)) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATESEQERROR);
goto drop_unlock;