[OpenSIPS-Users] Realtime monitoring of registered end-points

sevpal sevpal at aol.com
Thu Oct 1 16:15:44 CEST 2015

Is this now compatible with the location table existing in mongodb?

Secondly, some mobile clients do not respond to "opensipsctrl ping uri" but 
can still receive calls, does the module discern this?

-----Original Message----- 
From: Ionut Ionita
Sent: Thursday, October 01, 2015 4:33 AM
To: news at lists.opensips.org ; devel at lists.opensips.org ; OpenSIPS users 
mailling list
Subject: [OpenSIPS-Users] Realtime monitoring of registered end-points

*Hello all,

     I’m glad to announce a new feature that allows OpenSIPS to monitor
(via SIP OPTIONS probing) and disable/delete in realtime the registrations
which are not responding.
     The previous approach had two issues when came to so called “zombie”
registrations (registrations which are not valid anymore):
     * resources - such zombie registrations may waste resources in your
OpenSIPS server (memory,  processing time, DB space, useless NAT pinging,
TCP connect attempts);
     * user experience - using the zombie registration to reach un-existing
users translates into useless calls (calls that will simply timeout),
giving delays in the call setup (instead of going straight to VM, you may
burn 5-10 seconds in trying to reach the user);
     The main idea  behind these features is to delete contacts that do not
respond to a certain number of SIP pings. The SIP pinging is provided by the
nathelper module which was enhanced to keep the state of each pinging
(basically, the module is waiting and checking the reply of each SIP request
sent to the registered users). For registrations detected as “dead” (not
the nathelper module interacts directly with the usrloc module in order to
remove the zombie contact.
     For usage perspective, the nathelper module now has two new parameters:
     * ping_threshold - timeout to consider a ping as unanswered;
     * max_pings_lost - the number of unresponded pings after which the
contact is
removed from usrloc;
     In order to activate this feature, every contact must have the
(to be pinged) and remove_on_timeout_bflag (to be deleted on no-answer)
This means these flags must also be configured in the nathelper module. [0]
     For full documentation of the nathelper module including the newly
feature see [1]. Any feedback is highly appreciated.

Ionut Ionita


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