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authorHerbert Xu <herbert@gondor.apana.org.au>2006-02-28 00:00:40 +0300
committerDavid S. Miller <davem@davemloft.net>2006-02-28 00:00:40 +0300
commit752c1f4c78fe86d0fd6497387f763306b0d8fc53 (patch)
tree50d7e52940d1adf0936805645d52e2419e5922cf /net/xfrm
parent4bf05eceecf2efb4c883e9e9b17825682e7330dd (diff)
downloadlinux-752c1f4c78fe86d0fd6497387f763306b0d8fc53.tar.xz
[IPSEC]: Kill post_input hook and do NAT-T in esp_input directly
The only reason post_input exists at all is that it gives us the potential to adjust the checksums incrementally in future which we ought to do. However, after thinking about it for a bit we can adjust the checksums without using this post_input stuff at all. The crucial point is that only the inner-most NAT-T SA needs to be considered when adjusting checksums. What's more, the checksum adjustment comes down to a single u32 due to the linearity of IP checksums. We just happen to have a spare u32 lying around in our skb structure :) When ip_summed is set to CHECKSUM_NONE on input, the value of skb->csum is currently unused. All we have to do is to make that the checksum adjustment and voila, there goes all the post_input and decap structures! I've left in the decap data structures for now since it's intricately woven into the sec_path stuff. We can kill them later too. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_policy.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 8206025d8e46..ae62054a9fc4 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -996,13 +996,6 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
struct sec_decap_state *xvec = &(skb->sp->x[i]);
if (!xfrm_selector_match(&xvec->xvec->sel, &fl, family))
return 0;
-
- /* If there is a post_input processor, try running it */
- if (xvec->xvec->type->post_input &&
- (xvec->xvec->type->post_input)(xvec->xvec,
- &(xvec->decap),
- skb) != 0)
- return 0;
}
}