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authorHerbert Xu <herbert@gondor.apana.org.au>2006-02-27 13:00:40 -0800
committerDavid S. Miller <davem@davemloft.net>2006-02-27 13:00:40 -0800
commit752c1f4c78fe86d0fd6497387f763306b0d8fc53 (patch)
tree50d7e52940d1adf0936805645d52e2419e5922cf /include
parent4bf05eceecf2efb4c883e9e9b17825682e7330dd (diff)
[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 'include')
-rw-r--r--include/net/xfrm.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 004e645f3e1..8d362c49b8a 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -233,7 +233,6 @@ struct xfrm_type
int (*init_state)(struct xfrm_state *x);
void (*destructor)(struct xfrm_state *);
int (*input)(struct xfrm_state *, struct xfrm_decap_state *, struct sk_buff *skb);
- int (*post_input)(struct xfrm_state *, struct xfrm_decap_state *, struct sk_buff *skb);
int (*output)(struct xfrm_state *, struct sk_buff *pskb);
/* Estimate maximal size of result of transformation of a dgram */
u32 (*get_max_size)(struct xfrm_state *, int size);