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| author | Tobias Brunner <tobias@strongswan.org> | 2014-12-04 16:21:45 +0100 |
|---|---|---|
| committer | Tobias Brunner <tobias@strongswan.org> | 2014-12-15 16:09:15 +0100 |
| commit | d21b01462eb2365e16c4c0a8d3de7f33424b3fb9 (patch) | |
| tree | a7f9d79b8a595737082cbc139a1b330bb59ea471 /src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c | |
| parent | ac0cb2d3635f5356b6de24a3f47951070c4287bc (diff) | |
| download | strongswan-d21b01462eb2365e16c4c0a8d3de7f33424b3fb9.tar.bz2 strongswan-d21b01462eb2365e16c4c0a8d3de7f33424b3fb9.tar.xz | |
kernel-pfkey: Fix replay window size on FreeBSD and Mac OS X
The FreeBSD and Mac OS X kernels interpret sadb_sa_replay as the size of the
replay window in bytes. Linux on the other hand does the same for PF_KEY it
does for XFRM so sadb_sa_replay denotes the number of packets/bits in the
window. Similarly, the window size on Linux is limited to 32 by the four
byte default bitmap used for IPsec SAs (may only be changed with
XFRMA_REPLAY_ESN_VAL), which is not the case on the other platforms.
Diffstat (limited to 'src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c')
| -rw-r--r-- | src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c b/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c index 00ab5ab5a..6b5678270 100644 --- a/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c +++ b/src/libhydra/plugins/kernel_pfkey/kernel_pfkey_ipsec.c @@ -1680,7 +1680,13 @@ METHOD(kernel_ipsec_t, add_sa, status_t, } else { + /* Linux interprets sadb_sa_replay as number of packets/bits in the + * replay window, whereas on BSD it's the size of the window in bytes */ +#ifdef __linux__ sa->sadb_sa_replay = min(replay_window, 32); +#else + sa->sadb_sa_replay = (replay_window + 7) / 8; +#endif sa->sadb_sa_auth = lookup_algorithm(INTEGRITY_ALGORITHM, int_alg); sa->sadb_sa_encrypt = lookup_algorithm(ENCRYPTION_ALGORITHM, enc_alg); } |