Re: [OpenSIPStack] OpenSBC SIP Trunking - Null Session in CallSessionManager.cxx

[<jo...@op...>]

Hi Gaurav,

I apologize for the late response.  We just arrived from SIPIT 21.   My  
answers inline.


Gaurav Kheterpal wrote:
> Hello Joegen,
>
>  
>
> I grabbed the latest source code from CVS and configured OpenSBC for SIP
> trunking. While it may not be prime time, it works quiet well except for a
> couple of issues:-
>
>  
>
> 1) Upon initialization, OpenSBC is able to register successfully with
> various service providers. I configured a couple of Xlite softphones to
> register with OpenSBC and used them for testing inbound/ outbound calls with
> various service providers.
>
>  
>
> *	Placing an outbound call from one of the Xlite softphones to an
> external service provider (Gafachi) works fine (attached log - outgoing.log)
> *	Placing an inbound call from an external service provider to opensbc
> results in the following error in the log (attached log - incoming.log)
>
>  
>   


Many things could go wrong in a SIP trunk configuration.  Routing rely 
solely on the correct formating of the To URI.   You need to let me know 
about the specifics of your configuration like the domain of the SIP 
provider and the kind of INVITE the provider is sending to reach your 
trunk.    BTW, your attachment did not make it.   You can send it to me 
directly and i'll see what I can figure out.   An ethereal capture would 
also be nice just in case we are investigating low level interop issues 
aside from configuration issues.


> 4:43:39.304   DTL: [CID=0x0af8] Event: ---> Inbound - INVITE
> sip:16462781042@192.168.96.115:5066;transport=udp SIP/2.0
>
> 4:43:39.306   DBG: [CID=0x0af8] Session CREATED
>
> 4:43:39.306   INF: [CID=0x0af8] *** CREATED (UAS) CALL ***
> d82a729522b3f145f0798b363d25b6a1@64.192.112.13
>
> 4:43:39.306   INF: [CID=0x0af8] *** DESTROYED CALL ***
> d82a729522b3f145f0798b363d25b6a1@64.192.112.13
>
> 4:43:39.307   DBG: [CID=0x0af8] CALL: (inbound) : Session DESTROYED
>
> 4:43:39.308   ERR: [CID=0x0000] GC: .\src\CallSessionManager.cxx:528
> CallSessionManager::OnCreateServerSession::CallSession Attempt to
> CreateReference() a NULL Pointer or none descendant of PObject!!!
>
> 4:43:39.308   DBG: [CID=0x06cb] *** MESSAGE ARRIVAL *** No Session available
> to handle INVITE sip:16462781042@192.168.96.115:5066;transport=udp SIP/2.0
>
> 4:43:39.312   PWL: [CID=0x0000] Using Iface: 192.168.96.115 to send to Dest:
> 64.192.112.13
>
>  
>
> Can you confirm if it's a bug/ configuration issue? The log file is attached
> for reference
>
>  
>
> 2) While exploring various service providers, I found an issue with
> authentication in SIP trunking mode. While placing an outbound call to an
> external service provider from one of the UAs registered to SBC, if the
> external service provider requests authentication and returns a 407, the 407
> is relayed back by OpenSBC to the UA. This should not happen as all the
> credentials for service provider (trunk-account information) is present with
> the SBC itself. Any comments?
>
>  
>   

I guessing OpenSBC was not able to identify the call as a trunk call 
properly.   You are correct that the trunk should have handled the 
authentication instead of relaying the 407.  If you are using the Main 
trunk to route your calls to the SIP Trunk, you may try to use 
"sip-trunk" parameter in our b2bua route

Example:  [sip:1212*] sip:mytrunkprovider.com;sip-trunk=true


This would automatically tell the b2bua to route all calls bound to New 
York to be routed to the SIP Trunk.


> I look forward to hearing from you regarding these issues. Please let me
> know if you need any other information regarding the same.
>
>  
>
> Regards,
>
> Gaurav
>
>   
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