/**
* The Subscription timer looks for almost expired subscriptions and subscribes again.
* @param ticks - the current time
* @param param - the generic parameter
*/
void subscription_timer(unsigned int ticks, void* param)
{
r_subscription *s,*ns;
int i;
#ifdef WITH_IMS_PM
int subs_cnt=0;
#endif
for(i=0;i<subscriptions_hash_size;i++){
subs_lock(i);
s = subscriptions[i].head;
r_act_time();
while(s){
ns = s->next;
if (s->attempts_left > 0 ){
/* attempt to send a subscribe */
if (!r_send_subscribe(s,s->duration)){
LOG(L_ERR,"ERR:"M_NAME":subscription_timer: Error on SUBSCRIBE (%d times)... droping\n",
pcscf_subscribe_retries);
del_r_subscription_nolock(s);
}else{
s->attempts_left--;
#ifdef WITH_IMS_PM
subs_cnt++;
#endif
}
}else if (s->attempts_left==0) {
/* we failed to many times, drop the subscription */
LOG(L_ERR,"ERR:"M_NAME":subscription_timer: Error on SUBSCRIBE for %d times... aborting\n",pcscf_subscribe_retries);
del_r_subscription_nolock(s);
}else{
/* we are subscribed already */
/* if expired, drop it */
if (s->expires<time_now)
del_r_subscription_nolock(s);
#ifdef WITH_IMS_PM
else subs_cnt++;
#endif
/* if not expired, check for renewal */
// Commented as the S-CSCF should adjust the subscription time accordingly
// if ((s->duration<1200 && s->expires-time_now<s->duration/2)||
// (s->duration>=1200 && s->expires-time_now<600))
// {
// /* if we need a resubscribe, we mark it as such and try to subscribe again */
// s->attempts_left = pcscf_subscribe_retries;
// ns = s;
// }
}
s = ns;
}
subs_unlock(i);
}
print_subs(L_INFO);
#ifdef WITH_IMS_PM
IMS_PM_LOG01(RD_NbrSubs,subs_cnt);
#endif
}
/**
* Updates the expiration time of a subscription.
* \todo Maybe we should use a hash here to index it as this is called for every notification
* @param aor - aor to look for
* @param expires - new expiration time
* @returns 1 if found, 0 if not
*/
int update_r_subscription(r_subscription *s,int expires)
{
LOG(L_DBG,"DBG:"M_NAME":update_r_subscription: refreshing subscription for <%.*s> [%d]\n",
s->req_uri.len,s->req_uri.s,expires);
s->attempts_left = -1;
if (expires == 0) del_r_subscription_nolock(s);
else s->expires = expires+time_now;;
subs_unlock(s->hash);
return 1;
}