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xfrm: Check for the new replay implementation if an esn state is inserted 

IPsec extended sequence numbers can be used only with the new
anti-replay window implementation. So check if the new implementation
is used if an esn state is inserted and return an error if it is not.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steffen Klassert 2011-04-25 19:41:21 +00:00 committed by David S. Miller
parent c0a56e64ae
commit 7833aa05b8
1 changed files with 3 additions and 0 deletions
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3
net/xfrm/xfrm_user.c
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@ -124,6 +124,9 @@ static inline int verify_replay(struct xfrm_usersa_info *p,
{ {
struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
if ((p->flags & XFRM_STATE_ESN) && !rt)
return -EINVAL;
if (!rt) if (!rt)
return 0; return 0;