From 2cd084678fc1eb75aec4f7ae3d339d232c00ec61 Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Tue, 8 Mar 2011 00:09:51 +0000 Subject: xfrm: Add support for IPsec extended sequence numbers This patch adds support for IPsec extended sequence numbers (esn) as defined in RFC 4303. The bits to manage the anti-replay window are based on a patch from Alex Badea. Signed-off-by: Steffen Klassert Acked-by: Herbert Xu Signed-off-by: David S. Miller --- net/xfrm/xfrm_input.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'net/xfrm/xfrm_input.c') diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c index 55d5f5c3d119..872065ca7f8c 100644 --- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -107,6 +107,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) struct net *net = dev_net(skb->dev); int err; __be32 seq; + __be32 seq_hi; struct xfrm_state *x; xfrm_address_t *daddr; struct xfrm_mode *inner_mode; @@ -184,7 +185,10 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) spin_unlock(&x->lock); + seq_hi = htonl(xfrm_replay_seqhi(x, seq)); + XFRM_SKB_CB(skb)->seq.input.low = seq; + XFRM_SKB_CB(skb)->seq.input.hi = seq_hi; nexthdr = x->type->input(x, skb); -- cgit v1.2.3