[sr-dev] uac dialog callback and kamailio restarts

[Henning Westerholt]

Hi Daniel,

thank you, will have a look to the cnxcc module, good hint. Good to know 
that it should working even after a restart.

Cheers,

Henning

Am 10.04.19 um 08:56 schrieb Daniel-Constantin Mierla:
> Hello,
>
> I had in mind to check the code and be sure, but I forgot about it ...
> so, I think there is already a callback function that is executed by
> dialog module when loading records from database. Maybe uac module is
> not registering itself for it, or does it too late. Just look at what
> callbacks dialog exports, eventually see cnxcc module to see if it does
> something on this regard -- it depends on dialog and I expect it works
> also after restarting.
>
> Cheers,
> Daniel
>
> On 10.04.19 08:41, Henning Westerholt wrote:
>> Hello,
>>
>> any comments on this?
>>
>> Thanks and regards,
>>
>> Henning
>>
>> Am 05.04.19 um 17:03 schrieb Henning Westerholt:
>>> Hello,
>>>
>>> I am working right now on another difficult topic related to the usage
>>> of uac dialog callbacks for the usual replace from/to header logic
>>> after a kamailio restart.
>>>
>>> The uac/dialog module combination works just fine - but after a
>>> kamailio restart the dialog callback information is lost. So this
>>> means that for already established dialogs no from/to replacement
>>> operations are done. This causes errors later on during BYE or
>>> Re-INVITE signalization.
>>>
>>> I verified this with debug logging and can easily test this on a test
>>> system.
>>>
>>> One obvious workaround is of course not use the dialog module to store
>>> the data inside dialog variables.
>>>
>>> An approach to work on this problem would be to store the uac callback
>>> in the dialog table(s) as well, and then during kamailio startup use
>>> this to re-install the uac callback.
>>>
>>> Does this approach sounds feasible? Any other ideas how to tackle this
>>> issue?

-- 
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://skalatan.de/services