Re: [sr-dev] git:master: lib/srdb1: Fix compilation warning on 32-bit architectures

Hi there, I have a situation where subscriptions do not get notified and have tracked it down to a problem with the polled notify processing. Can you advise if this is a bug or correct my understanding of the code. I am using kamailio 3.3.3 and have 1 notify process. I have extended the support for the ua-profile event (rfc 6080). When a new subscription arrives it is added to the active_watchers table, the 'updated' column is assigned a number in the range 0 - N-1, where N is effectively the total number of polled update tasks that are called in a round-robin fashion, distributed across the notify processes. In this case updated = 7. In subscribe.c: int update_subscription_notifier(struct sip_msg* msg, subs_t* subs, int to_tag_gen, int* sent_reply) { ... /* Set the notifier/update fields for the subscription */ subs->updated = core_hash(&subs->callid, &subs->from_tag, 0) % (pres_waitn_time * pres_notifier_poll_rate * pres_notifier_processes); The notify process periodically calls pres_timer_send_notify(), which calculates the round (the update task number) and does the notify update by checking the active_watchers table for entries with updated = round. The update is done twice, first for the event then for event.winfo. In notify.c: void pres_timer_send_notify(unsigned int ticks, void *param) { int process_num = *((int *) param); int round = subset + (pres_waitn_time * pres_notifier_poll_rate * process_num); if (process_dialogs(round, 0) < 0) { LM_ERR("Handling non presence.winfo dialogs\n"); return; } if (process_dialogs(round, 1) < 0) { LM_ERR("Handling presence.winfo dialogs\n"); return; } } In this instance process_num = 0, so round = subset. However subset is incremented in process_dialogs() in notify.c: if (++subset > (pres_waitn_time * pres_notifier_poll_rate) -1) subset = 0; This means that round is incremented twice between calls to process_dialogs(round, 0), in my case round is always even, hence not detecting the subscription with updated = 7. It seems that the subset increment should be done in pres_timer_send_notify() rather than in process_dialogs(). Does that make sense? Additionally, is there a need for the second call that only handles presence.winfo subscriptions? The code could be simplified by only making one call and processing all subscriptions for the round. Cheers Shane Harrison -- Imagination NZ Ltd Level 6 92 Queens Drive P0 Box 30449 Lower Hutt 5040 +64 4 5703870 Extn 875 +64 21 608919 (mobile)