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| author | Steffen Klassert <steffen.klassert@secunet.com> | 2011-03-08 00:05:43 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-13 20:22:28 -0700 |
| commit | 9736acf395d3608583a7be70f62800b494fa103c (patch) | |
| tree | ef7b50bb74a7e6a0d93f962cc7a4c98dd18c2caa /include/net | |
| parent | a5079d084f8be781aae8a635cab4b179cfea4ebd (diff) | |
| download | linux-9736acf395d3608583a7be70f62800b494fa103c.tar.gz linux-9736acf395d3608583a7be70f62800b494fa103c.tar.bz2 linux-9736acf395d3608583a7be70f62800b494fa103c.zip | |
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')
| -rw-r--r-- | include/net/xfrm.h | 7 |
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) { |