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-rw-r--r--src/libcharon/plugins/kernel_pfkey/kernel_pfkey_ipsec.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/src/libcharon/plugins/kernel_pfkey/kernel_pfkey_ipsec.c b/src/libcharon/plugins/kernel_pfkey/kernel_pfkey_ipsec.c
index 516a15abe..1b22ea549 100644
--- a/src/libcharon/plugins/kernel_pfkey/kernel_pfkey_ipsec.c
+++ b/src/libcharon/plugins/kernel_pfkey/kernel_pfkey_ipsec.c
@@ -1725,12 +1725,17 @@ 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 */
+ * replay window, whereas on BSD it's the size of the window in bytes.
+ * Only set for the inbound SA as it's not relevant for the outbound
+ * SA and might waste memory with large windows. */
+ if (data->inbound)
+ {
#ifdef __linux__
- sa->sadb_sa_replay = min(data->replay_window, 32);
+ sa->sadb_sa_replay = min(data->replay_window, 32);
#else
- sa->sadb_sa_replay = (data->replay_window + 7) / 8;
+ sa->sadb_sa_replay = (data->replay_window + 7) / 8;
#endif
+ }
sa->sadb_sa_auth = lookup_algorithm(INTEGRITY_ALGORITHM, data->int_alg);
sa->sadb_sa_encrypt = lookup_algorithm(ENCRYPTION_ALGORITHM,
data->enc_alg);