[OpenSIPS-Users] Dialog matching problem

[Bogdan-Andrei Iancu]

Hi Jan,

no you are not misusing the module, you can put the same call multiple 
times in the dialog module - of course, when call is spiraling.

In loose_route(), the function should match the Route header 
corresponding to that passing through the server (in your case, A1 will 
have 2 Route headers - with different dialog ids ) - and at each passing 
it should identify the corresponding Route header.

Do you have a SIP capture showing the ACK that hits A1 first time ?

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com


On 09/06/2012 05:26 AM, Jan Blom wrote:
>
> Hello,
>
> I have problems with my dialog matching, using OpenSIPS 1.8.0. I have 
> two edge proxies, A1 and A2, and an intermediate proxy B.
>
> An INVITE is received by A1 and passed on to B.
>
> B processes the request and sends in to A2.
>
> A2 send request to whatever destination that has been decided.
>
> Both A1 and A2 want to keep track on state during the call so they 
> create dialogs. So far so good.
>
> However, B actually load balance the requests so a request might come 
> back to A1. A1 will then try to create a new dialog for the same 
> INVITE. Technically speaking this is the same dialog in terms of the 
> RFC, however there are two dialog data structures created. I can see 
> structures being allocated and the DID parameter in the record route 
> header filled in properly (different values).
>
> The problem is that  the dialog matching when calling loose_route() 
> will not find the first created dialog on subsequent requests (ACK or 
> BYE). I am using dlg_match_mode=0 (DID only).
>
> Am I misusing the dialog modules when trying to create two dialogs for 
> the same call (on ingress and egress)?
>
> Since I actually have got two different DID parameters on two record 
> route headers, I cannot see why it shouldn't work.
>
> I cannot seem to find another way to do it, since I cannot know if I 
> am back to the same edge proxy or not.
>
> Regards,
>
> Jan
>
>
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