[SR-Users] Modifying SDP in Kamailio

[Daniel-Constantin Mierla]

Hello,

perhaps the logs of freeswitch can say more, but I am not familiar 
reading them. You can send here the ngrep output on port 5060 on 
kamailio server to see if what is sent to freeswitch is ok.

Cheers,
Daniel

On 18/05/14 08:34, MrIhaveAnOpinionOnEverything wrote:
> Hi guys:
>
>     I am a R&D engineer trying to learn kamailio.  After following 
> some tutorials and reading the thread in this mailing list I was able 
> to setup a voip backend with this configuration
>
>
> XLITE/LINPHONE ---> KAMAILIO ----> FREESWITCH
>
>    I am using Freeswitch as a media server.  After configuring RTP 
> Proxy and kamailio to use bridged mode. I was able to successfully 
> setup a voip backend like the one above.
>
>    I encountered a problem when the UAC I am using is a webclient like 
> sipml5.
>
>    I noticed that when SIP INVITES from KAMAILIO to FREESWITCH are 
> being passed when a INVITE transaction is initiated from a sipml5 
> client FREESWITCH is trying to use the public ip of webrtc server of 
> the sipml5 backend. Unfortunately, I am using private ip/LAN IP 
> between kamailio and freeswitch. As a result calls are established but 
> there is no audio that is happening.
>
>     I am attaching a snapshot of the ngrep that on kamailio and 
> freeswitch server for your reference.
>
>     I would like to know if there is a setting in kamailio that would 
> allow me to modify the IP in the "o" and "c" sdp parameter when 
> forwarding an invite to Freeswitch.
>
>     I did another test. XLITE ---> KAMAILIO ---> FREESWITCH ----> 
> KAMAILIO ----> sipml5 And the call works. It has audio. I think it 
> must have something to do with the SDP header that is being generated 
> by sip5ml UAC that is conflicting with my setup.
>
>     Any help or advice will be greatly appreciated. Thanks.
>
> -- 
> "When I look at you I see two people, ther person you are
> and the person you are supposed to be. Someday these two
> people will meet. And when they do, they will achieve great things"
> - Gene Hackman, The Replacements
>
> Catch up on me and check my BLOG at
> http://mrihaveanopiniononeverything.blogspot.com
>
>
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-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

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