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authorSteffen Klassert <steffen.klassert@secunet.com>2011-03-08 03:05:43 +0300
committerDavid S. Miller <davem@davemloft.net>2011-03-14 06:22:28 +0300
commit9736acf395d3608583a7be70f62800b494fa103c (patch)
treeef7b50bb74a7e6a0d93f962cc7a4c98dd18c2caa /include/net/xfrm.h
parenta5079d084f8be781aae8a635cab4b179cfea4ebd (diff)
downloadlinux-9736acf395d3608583a7be70f62800b494fa103c.tar.xz
xfrm: Add basic infrastructure to support IPsec extended sequence numbers
This patch adds the struct xfrm_replay_state_esn which will be used to support IPsec extended sequence numbers and anti replay windows bigger than 32 packets. Also we add a function that returns the actual size of the xfrm_replay_state_esn, a xfrm netlink atribute and a xfrm state flag for the use of extended sequence numbers. 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>
Diffstat (limited to 'include/net/xfrm.h')
-rw-r--r--include/net/xfrm.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 8f8bd82606bf..7640822bc515 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -186,9 +186,11 @@ struct xfrm_state {
/* State for replay detection */
struct xfrm_replay_state replay;
+ struct xfrm_replay_state_esn *replay_esn;
/* Replay detection state at the time we sent the last notification */
struct xfrm_replay_state preplay;
+ struct xfrm_replay_state_esn *preplay_esn;
/* internal flag that only holds state for delayed aevent at the
* moment
@@ -1569,6 +1571,11 @@ static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
}
+static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
+{
+ return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
+}
+
#ifdef CONFIG_XFRM_MIGRATE
static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
{