[OpenSIPS-Users] Topology hiding and unsuccessful dialog termination

[Bogdan-Andrei Iancu]

Hi Chen-Che

So the BYE (from callee), when sent out from outbound server to proxy 
server has no Route header ?

Could you post a SIP trace showing the call on outbound proxy (you can 
send it off list, for privacy reasons) - this will help me to understand 
the failure and the reason.

Regards,

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


On 01/23/2013 05:13 PM, microx wrote:
> Hi Bogdan-Andrei,
>
> I'm not familiar with B2B and thus do not use any B2B-related modules (eg.,
> B2B_LOGIC and B2B_ENTITIES).
> In my scenario, the outbound proxy is only responsible for hiding the IP
> address of the proxy server by
> using topology_hiding(). All other functions such as user registration and
> authentication, dialog handling and RTP proxy offering are handled by the
> proxy server.
>
> The BYE message is correctly sent from the callee to the caller
> (callee->outbound proxy->proxy server->outbound proxy->caller). However,
> because topology hiding is invoked at the outbound proxy, the BYE message
> from the callee has no Route hdr. When receiving the BYE message forwarded
> by the outbound
> proxy, the proxy server cannot find the associated dialog due to that the
> BYE message has no Route hdr.
> So the proxy server fails to terminate the dialog associated with the
> received BYE message.
>
> I guess that topology hiding and dialog handling need to be done at the same
> SIP element using OpenSIPS.
> I hope that there exists some solution to make my scenario workable. Any
> suggestion is welcome. Thanks so much.
>
> Best regards,
> Chen-Che
>
>
>
> --
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>
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