diff options
| -rw-r--r-- | src/libcharon/sa/task_manager.c | 32 | ||||
| -rw-r--r-- | src/libcharon/sa/task_manager.h | 11 |
2 files changed, 42 insertions, 1 deletions
diff --git a/src/libcharon/sa/task_manager.c b/src/libcharon/sa/task_manager.c index c42008ba9..bd1191406 100644 --- a/src/libcharon/sa/task_manager.c +++ b/src/libcharon/sa/task_manager.c @@ -15,10 +15,40 @@ #include "task_manager.h" +#include <math.h> #include <sa/ikev1/task_manager_v1.h> #include <sa/ikev2/task_manager_v2.h> -/** +/* + * See header + */ +u_int task_manager_total_retransmit_timeout() +{ + double timeout, base, limit = 0, total = 0; + int tries, i; + + tries = lib->settings->get_int(lib->settings, "%s.retransmit_tries", + RETRANSMIT_TRIES, lib->ns); + base = lib->settings->get_double(lib->settings, "%s.retransmit_base", + RETRANSMIT_BASE, lib->ns); + timeout = lib->settings->get_double(lib->settings, "%s.retransmit_timeout", + RETRANSMIT_TIMEOUT, lib->ns); + limit = lib->settings->get_double(lib->settings, "%s.retransmit_limit", + 0, lib->ns); + + for (i = 0; i <= tries; i++) + { + double interval = timeout * pow(base, i); + if (limit) + { + interval = min(interval, limit); + } + total += interval; + } + return (u_int)total; +} + +/* * See header */ task_manager_t *task_manager_create(ike_sa_t *ike_sa) diff --git a/src/libcharon/sa/task_manager.h b/src/libcharon/sa/task_manager.h index 4d3f9bef5..e3fddf39b 100644 --- a/src/libcharon/sa/task_manager.h +++ b/src/libcharon/sa/task_manager.h @@ -303,6 +303,17 @@ struct task_manager_t { }; /** + * Calculate total timeout of the retransmission mechanism. + * + * This is affected by modifications of retransmit_base, retransmit_timeout, + * retransmit_limit or retransmit_tries. The resulting value can then be used + * e.g. in kernel plugins to set the system's acquire timeout properly. + * + * @return calculated total retransmission timeout in seconds + */ +u_int task_manager_total_retransmit_timeout(); + +/** * Create a task manager instance for the correct IKE version. * * @param ike_sa IKE_SA to create a task manager for |