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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2006-02-27 22:00:40 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-02-27 22:00:40 +0100 |
| commit | 752c1f4c78fe86d0fd6497387f763306b0d8fc53 (patch) | |
| tree | 50d7e52940d1adf0936805645d52e2419e5922cf /include | |
| parent | [IPSEC] esp: Kill unnecessary block and indentation (diff) | |
| download | linux-752c1f4c78fe86d0fd6497387f763306b0d8fc53.tar.xz linux-752c1f4c78fe86d0fd6497387f763306b0d8fc53.zip | |
[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.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 004e645f3e18..8d362c49b8a9 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); |