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

[Bogdan-Andrei Iancu]

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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