/* Timer callback. When the timer is fired, it can be time to refresh
* the session if UA is the refresher, otherwise it is time to end
* the session.
*/
static void timer_cb(pj_timer_heap_t *timer_heap, struct pj_timer_entry *entry)
{
pjsip_inv_session *inv = (pjsip_inv_session*) entry->user_data;
pjsip_tx_data *tdata = NULL;
pj_status_t status;
pj_bool_t as_refresher;
pj_assert(inv);
PJ_UNUSED_ARG(timer_heap);
/* Lock dialog. */
pjsip_dlg_inc_lock(inv->dlg);
/* Check our role */
as_refresher =
(inv->timer->refresher == TR_UAC && inv->timer->role == PJSIP_ROLE_UAC) ||
(inv->timer->refresher == TR_UAS && inv->timer->role == PJSIP_ROLE_UAS);
/* Do action based on role(refresher or refreshee).
* As refresher:
* - send refresh, or
* - end session if there is no response to the refresh request.
* As refreshee:
* - end session if there is no refresh request received.
*/
if (as_refresher && (entry->id != REFRESHER_EXPIRE_TIMER_ID)) {
pj_time_val now;
/* As refresher, reshedule the refresh request on the following:
* - must not send re-INVITE if another INVITE or SDP negotiation
* is in progress.
* - must not send UPDATE with SDP if SDP negotiation is in progress
*/
pjmedia_sdp_neg_state neg_state = pjmedia_sdp_neg_get_state(inv->neg);
inv->timer->timer.id = 0;
if ( (!inv->timer->use_update && (
inv->invite_tsx != NULL ||
neg_state != PJMEDIA_SDP_NEG_STATE_DONE)
)
||
(inv->timer->use_update && inv->timer->with_sdp &&
neg_state != PJMEDIA_SDP_NEG_STATE_DONE
)
)
{
pj_time_val delay = {1, 0};
inv->timer->timer.id = 1;
pjsip_endpt_schedule_timer(inv->dlg->endpt, &inv->timer->timer,
&delay);
pjsip_dlg_dec_lock(inv->dlg);
return;
}
/* Refresher, refresh the session */
if (inv->timer->use_update) {
const pjmedia_sdp_session *offer = NULL;
if (inv->timer->with_sdp) {
pjmedia_sdp_neg_get_active_local(inv->neg, &offer);
}
status = pjsip_inv_update(inv, NULL, offer, &tdata);
} else {
/* Create re-INVITE without modifying session */
pjsip_msg_body *body;
const pjmedia_sdp_session *offer = NULL;
pj_assert(pjmedia_sdp_neg_get_state(inv->neg) ==
PJMEDIA_SDP_NEG_STATE_DONE);
status = pjsip_inv_invite(inv, &tdata);
if (status == PJ_SUCCESS)
status = pjmedia_sdp_neg_send_local_offer(inv->pool_prov,
inv->neg, &offer);
if (status == PJ_SUCCESS)
status = pjmedia_sdp_neg_get_neg_local(inv->neg, &offer);
if (status == PJ_SUCCESS) {
status = pjsip_create_sdp_body(tdata->pool,
(pjmedia_sdp_session*)offer, &body);
tdata->msg->body = body;
}
}
pj_gettimeofday(&now);
PJ_LOG(4, (inv->pool->obj_name,
"Refreshing session after %ds (expiration period=%ds)",
(now.sec-inv->timer->last_refresh.sec),
inv->timer->setting.sess_expires));
} else {
pj_time_val now;
if (as_refresher)
inv->timer->expire_timer.id = 0;
else
inv->timer->timer.id = 0;
/* Terminate the session */
status = pjsip_inv_end_session(inv, PJSIP_SC_REQUEST_TIMEOUT,
NULL, &tdata);
pj_gettimeofday(&now);
PJ_LOG(3, (inv->pool->obj_name,
"No session %s received after %ds "
"(expiration period=%ds), stopping session now!",
(as_refresher?"refresh response":"refresh"),
(now.sec-inv->timer->last_refresh.sec),
inv->timer->setting.sess_expires));
}
/* Unlock dialog. */
pjsip_dlg_dec_lock(inv->dlg);
/* Send message, if any */
if (tdata && status == PJ_SUCCESS) {
inv->timer->refresh_tdata = tdata;
status = pjsip_inv_send_msg(inv, tdata);
}
/* Print error message, if any */
if (status != PJ_SUCCESS) {
PJ_PERROR(2, (inv->pool->obj_name, status,
"Error in %s session timer",
((as_refresher && entry->id != REFRESHER_EXPIRE_TIMER_ID)?
"refreshing" : "terminating")));
}
}
/* Timer callback. When the timer is fired, it can be time to refresh
* the session if UA is the refresher, otherwise it is time to end
* the session.
*/
void timer_cb(pj_timer_heap_t *timer_heap, struct pj_timer_entry *entry)
{
pjsip_inv_session *inv = (pjsip_inv_session*) entry->user_data;
pjsip_tx_data *tdata = NULL;
pj_status_t status;
pj_bool_t as_refresher;
pj_assert(inv);
PJ_UNUSED_ARG(timer_heap);
/* When there is a pending INVITE transaction, delay/reschedule this timer
* for five seconds to cover the case that pending INVITE fails and the
* previous session is still active. If the pending INVITE is successful,
* timer state will be updated, i.e: restarted or stopped.
*/
if (inv->invite_tsx != NULL) {
pj_time_val delay = {5};
inv->timer->timer.id = 1;
pjsip_endpt_schedule_timer(inv->dlg->endpt, &inv->timer->timer, &delay);
return;
}
/* Lock dialog. */
pjsip_dlg_inc_lock(inv->dlg);
/* Check our role */
as_refresher =
(inv->timer->refresher == TR_UAC && inv->timer->role == PJSIP_ROLE_UAC) ||
(inv->timer->refresher == TR_UAS && inv->timer->role == PJSIP_ROLE_UAS);
/* Do action based on role, refresher or refreshee */
if (as_refresher) {
pj_time_val now;
/* Refresher, refresh the session */
if (inv->timer->use_update) {
/* Create UPDATE request without offer */
status = pjsip_inv_update(inv, NULL, NULL, &tdata);
} else {
/* Create re-INVITE without modifying session */
pjsip_msg_body *body;
const pjmedia_sdp_session *offer = NULL;
pj_assert(pjmedia_sdp_neg_get_state(inv->neg) ==
PJMEDIA_SDP_NEG_STATE_DONE);
status = pjsip_inv_invite(inv, &tdata);
if (status == PJ_SUCCESS)
status = pjmedia_sdp_neg_send_local_offer(inv->pool_prov,
inv->neg, &offer);
if (status == PJ_SUCCESS)
status = pjmedia_sdp_neg_get_neg_local(inv->neg, &offer);
if (status == PJ_SUCCESS) {
status = pjsip_create_sdp_body(tdata->pool,
(pjmedia_sdp_session*)offer, &body);
tdata->msg->body = body;
}
}
pj_gettimeofday(&now);
PJ_LOG(4, (inv->pool->obj_name,
"Refresh session after %ds (expiration period=%ds)",
(now.sec-inv->timer->last_refresh.sec),
inv->timer->setting.sess_expires));
} else {
pj_time_val now;
/* Refreshee, terminate the session */
status = pjsip_inv_end_session(inv, PJSIP_SC_REQUEST_TIMEOUT,
NULL, &tdata);
pj_gettimeofday(&now);
PJ_LOG(3, (inv->pool->obj_name,
"No session refresh received after %ds "
"(expiration period=%ds), stopping session now!",
(now.sec-inv->timer->last_refresh.sec),
inv->timer->setting.sess_expires));
}
/* Unlock dialog. */
pjsip_dlg_dec_lock(inv->dlg);
/* Send message, if any */
if (tdata && status == PJ_SUCCESS) {
status = pjsip_inv_send_msg(inv, tdata);
}
/* Print error message, if any */
if (status != PJ_SUCCESS) {
char errmsg[PJ_ERR_MSG_SIZE];
if (tdata)
pjsip_tx_data_dec_ref(tdata);
pj_strerror(status, errmsg, sizeof(errmsg));
PJ_LOG(2, (inv->pool->obj_name, "Session timer fails in %s session, "
"err code=%d (%s)",
(as_refresher? "refreshing" :
"terminating"),
status, errmsg));
}
}
