diff options
Diffstat (limited to 'src/libcharon/sa/ikev1/task_manager_v1.c')
| -rw-r--r-- | src/libcharon/sa/ikev1/task_manager_v1.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/src/libcharon/sa/ikev1/task_manager_v1.c b/src/libcharon/sa/ikev1/task_manager_v1.c index 1da17ee50..48ec3e7f5 100644 --- a/src/libcharon/sa/ikev1/task_manager_v1.c +++ b/src/libcharon/sa/ikev1/task_manager_v1.c @@ -210,6 +210,16 @@ struct private_task_manager_t { double retransmit_base; /** + * Jitter to apply to calculated retransmit timeout (in percent) + */ + u_int retransmit_jitter; + + /** + * Limit retransmit timeout to this value + */ + uint32_t retransmit_limit; + + /** * Sequence number for sending DPD requests */ uint32_t dpd_send; @@ -345,7 +355,7 @@ static status_t retransmit_packet(private_task_manager_t *this, uint32_t seqnr, u_int mid, u_int retransmitted, array_t *packets) { packet_t *packet; - uint32_t t; + uint32_t t, max_jitter; array_get(packets, 0, &packet); if (retransmitted > this->retransmit_tries) @@ -356,6 +366,15 @@ static status_t retransmit_packet(private_task_manager_t *this, uint32_t seqnr, } t = (uint32_t)(this->retransmit_timeout * 1000.0 * pow(this->retransmit_base, retransmitted)); + if (this->retransmit_limit) + { + t = min(t, this->retransmit_limit); + } + if (this->retransmit_jitter) + { + max_jitter = (t / 100.0) * this->retransmit_jitter; + t -= max_jitter * (random() / (RAND_MAX + 1.0)); + } if (retransmitted) { DBG1(DBG_IKE, "sending retransmit %u of %s message ID %u, seq %u", @@ -2034,11 +2053,15 @@ task_manager_v1_t *task_manager_v1_create(ike_sa_t *ike_sa) .active_tasks = linked_list_create(), .passive_tasks = linked_list_create(), .retransmit_tries = lib->settings->get_int(lib->settings, - "%s.retransmit_tries", RETRANSMIT_TRIES, lib->ns), + "%s.retransmit_tries", RETRANSMIT_TRIES, lib->ns), .retransmit_timeout = lib->settings->get_double(lib->settings, - "%s.retransmit_timeout", RETRANSMIT_TIMEOUT, lib->ns), + "%s.retransmit_timeout", RETRANSMIT_TIMEOUT, lib->ns), .retransmit_base = lib->settings->get_double(lib->settings, - "%s.retransmit_base", RETRANSMIT_BASE, lib->ns), + "%s.retransmit_base", RETRANSMIT_BASE, lib->ns), + .retransmit_jitter = min(lib->settings->get_int(lib->settings, + "%s.retransmit_jitter", 0, lib->ns), RETRANSMIT_JITTER_MAX), + .retransmit_limit = lib->settings->get_int(lib->settings, + "%s.retransmit_limit", 0, lib->ns) * 1000, ); if (!this->rng) |