Hi sevpal,
The way nathelper module interacts with usrloc module(location
table) is exactly the same. Only used the new contact_id features.
About the ping: it is an OPTIONS ping, a bit more complex than the
one in "ping <uri>", but still an OPTIONS ping. The implementation
considers that if a destination does not responded to a certain number
of OPTIONS pings it is not available. We can't do much in that
direction. From script level, you can leave the remove_on_timeout_bflag
unset for some destinations.
Regards,
Ionut-Razvan Ionita
On 01.10.2015 17:15, sevpal wrote:
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: [email protected] ; [email protected] ; 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
requests
(basically, the module is waiting and checking the reply of each SIP
request
sent to the registered users). For registrations detected as “dead” (not
responding),
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
sipping_bflag
(to be pinged) and remove_on_timeout_bflag (to be deleted on no-answer)
activated.
This means these flags must also be configured in the nathelper
module. [0]
For full documentation of the nathelper module including the newly
added
feature see [1]. Any feedback is highly appreciated.
Regards,
Ionut Ionita
[0]http://www.opensips.org/html/docs/modules/2.2.x/nathelper.html#id248011
[1]http://www.opensips.org/html/docs/modules/2.2.x/nathelper.html
*
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