[OpenSIPS-Users] [Blog] How to Eliminate Zombie Registrations in OpenSIPS

Wed Oct 9 15:59:28 UTC 2024

ok, good point. Anyway, we never start tcp conns from openSIPS to avoid
blocking issues, so that's not a problem.
Thanks!

On Wed, Oct 9, 2024 at 9:53 AM Bogdan-Andrei Iancu <bogdan at opensips.org>
wrote:

> True, that's even a better idea. But be sure your all conns are
> *received*, so you can check for the dst port as 5061 for example. If the
> conn is originated by OpenSIPS, you will have an ephemeral port, so you
> will not be able to check.
>
> Regards,
>
> Bogdan-Andrei Iancu
>
> OpenSIPS Founder and Developer
>   https://www.opensips-solutions.com
>   https://www.siphub.com
>
> On 09.10.2024 14:50, Federico Edorna wrote:
>
> Hi Bogdan,
>
> Not so crazy idea, in fact you make me think that maybe I can listen on a
> new/different tcp port for pn-enabled terminals and then I can catch the
> dst_port param in E_CORE_TCP_DISCONNECT event to decide whether to use
> remove_ip_port() or not.
>
> Thanks!!
>
>
> On Wed, Oct 9, 2024 at 3:21 AM Bogdan-Andrei Iancu <bogdan at opensips.org>
> wrote:
>
>> Hi Federico,
>>
>> That's a very good point. And the only way to do this would be by some
>> extension in the remove_ip_port() to skip certain contacts, maybe based on
>> some branch flag (bflag).....Currently there is no way to do this kind of
>> skipping with the existing code.
>>
>> Maybe a crazy idea here....to use 2 usrloc domains/tables, like
>> "location" for regular contacts and "location-pn" for the push notification
>> contacts. You do (based on E_CORE_TCP_DISCONNECT) removal only from
>> "location"...and when you do lookup, you do from both ..  Again, crazy idea
>> :)
>>
>> Regards,
>>
>> Bogdan-Andrei Iancu
>>
>> OpenSIPS Founder and Developer
>>   https://www.opensips-solutions.com
>>   https://www.siphub.com
>>
>> On 08.10.2024 14:09, Federico Edorna wrote:
>>
>> Thanks Bogan, very useful information. Regarding the
>> E_CORE_TCP_DISCONNECT event, I wonder if it is possible to avoid removing
>> the contact for Push Notification user agents. Because the TCP connection
>> may go down, but we must keep the contact in usrloc. Do you think it is
>> possible to detect this special case in some way?
>> Best regards
>>
>> On Thu, Oct 3, 2024 at 11:49 AM Bogdan-Andrei Iancu <bogdan at opensips.org>
>> wrote:
>>
>>> Sure, it will do it!
>>>
>>> Regards,
>>>
>>> Bogdan-Andrei Iancu
>>>
>>> OpenSIPS Founder and Developer
>>>   https://www.opensips-solutions.com
>>>   https://www.siphub.com
>>>
>>> On 03.10.2024 17:26, M S wrote:
>>>
>>> What if I add a header (in local_route) to locally generated unregister
>>> messages from midregistrar opensips to tell the main registrar that it is a
>>> special message, and in the main registrar just call save("location") for
>>> these messages without any www_authorize?
>>>
>>> On Thu, Oct 3, 2024 at 4:00 PM Bogdan-Andrei Iancu <bogdan at opensips.org>
>>> wrote:
>>>
>>>> Well, good question. The mechanism will perfectly work between the
>>>> mid_registrar and the end-devices. But if the mid_registrar detects and
>>>> remove a zombie contact, it may have to preform a de-registration
>>>> (depending on the mid registrar mode) with the main registrar. That means
>>>> an REGISTER generated by mid-registrar OpenSIPS - and if you do digest auth
>>>> on the main registrar, this will fail :(
>>>>
>>>> Regards,
>>>>
>>>> Bogdan-Andrei Iancu
>>>>
>>>> OpenSIPS Founder and Developer
>>>>   https://www.opensips-solutions.com
>>>>   https://www.siphub.com
>>>>
>>>> On 03.10.2024 16:20, M S wrote:
>>>>
>>>> Hi Bogdan,
>>>> Thank you for your post and explanation, does this work the same with
>>>> mid_registrar too, i.e. if a contact is marked with RTO is it discarded
>>>> from mid_registrar location if it is zombie?
>>>>
>>>> Thank you!
>>>>
>>>> On Thu, Oct 3, 2024 at 1:04 PM Bogdan-Andrei Iancu <bogdan at opensips.org>
>>>> wrote:
>>>>
>>>>>
>>>>> Here is a short post on how to improve your OpenSIPS registrar
>>>>> performance and also your user's experience in the same time.... by
>>>>> fighting the zombies.... the zombie registrations 🙂
>>>>>
>>>>>
>>>>> https://blog.opensips.org/2024/10/03/how-to-eliminate-zombie-registrations-in-opensips/
>>>>>
>>>>> Enjoy,
>>>>>
>>>>> --
>>>>> Bogdan-Andrei Iancu
>>>>>
>>>>> OpenSIPS Founder and Developer
>>>>>    https://www.opensips-solutions.com
>>>>>    https://www.siphub.com
>>>>>
>>>>>
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>>>>>
>>>>
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>>
>
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