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[IPSEC]: Add xfrm_input_state helper 

This patch adds the xfrm_input_state helper function which returns the
current xfrm state being processed on the input path given an sk_buff.
This is currently only used by xfrm_input but will be used by ESP upon
asynchronous resumption.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2007-12-11 01:53:43 -08:00 committed by David S. Miller
parent 385ac2e3f2
commit 005011211f
2 changed files with 6 additions and 1 deletions
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5
include/net/xfrm.h
View File

@ -1317,4 +1317,9 @@ static inline void xfrm_states_delete(struct xfrm_state **states, int n)
}
#endif
static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
{
return skb->sp->xvec[skb->sp->len - 1];
}
#endif /* _NET_XFRM_H */

2
net/xfrm/xfrm_input.c
View File

@ -109,7 +109,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
/* A negative encap_type indicates async resumption. */
if (encap_type < 0) {
async = 1;
x = skb->sp->xvec[skb->sp->len - 1];
x = xfrm_input_state(skb);
seq = XFRM_SKB_CB(skb)->seq;
goto resume;
}