[SR-Users] how to use fix_nated_sdp("2") with multiple media types

[MARINA SERRANO MONTES]

Hi Daniel,

I have tested using "rtpproxy_manage("", public IP), but in this case, it replaces all the c= lines with this public IP, included c=lines in media descriptions and then, the rtp traffic is not routing to the right IP in MCU.

Have I to set up any value/param….to route rtp traffic through rtpproxy in sip server and then it will dispatch RTP packets to MCU?

Thanks.

Br,
Marina

From: Daniel-Constantin Mierla <miconda at gmail.com<mailto:miconda at gmail.com>>
Reply-To: "miconda at gmail.com<mailto:miconda at gmail.com>" <miconda at gmail.com<mailto:miconda at gmail.com>>
Date: lunes 8 de octubre de 2012 16:04
To: "SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List" <sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org>>
Cc: Vicente Hernando <vhernando at systemonenoc.com<mailto:vhernando at systemonenoc.com>>, Marina Serrano Montes <marinas at tid.es<mailto:marinas at tid.es>>
Subject: Re: [SR-Users] how to use fix_nated_sdp("2") with multiple media types

Hello,

I understood that Marina is looking for the option of being able to use different IP addresses for updating various c= lines in SDP.

fix_nated_sdp(...) can work only with one IP address given as second parameter (or taken for source address of the packet).

Perhaps fix_nated_sdp(...) can be easily extended to support a list of ip addresses in the second parameter. For now the solution is to use rtpproxy to rewrite all the IP addresses in c= lines with the IP address of the rtpproxy. RTPProxy will then dispatch RTP to the right IP address assigned for each media stream.

Regarding the patch sent by Vicente, I just replied on sr-dev mailing list.

Cheers,
Daniel

On 10/8/12 3:25 PM, Vicente Hernando wrote:
Hello Marina,

there is a bug in sdp parser about c IPs which are not correctly reset for non existent c values in streams.

I have still not uploaded it to master branch, sorry.

May be it is related to your issue, in this link you have the attached patch.

http://lists.sip-router.org/pipermail/sr-dev/2012-September/016440.html


Kind regards,
Vicente.

On 10/08/2012 01:18 PM, MARINA SERRANO MONTES wrote:
Hi,

I have a doubt about how to use "fix_nated_sdp("2")" function when we have an scenario with multiple media types (audio and video) and the param "c" in sdp for each media type has a different IP.
We are using a SCOPIA 400 MCU to multi-party in a call, and it will set up different IP to send RTP depend on media type.

I have tested this function, but it rewrites always all the "c" parameter with the same value.

Is there any option to use the function or to rewrite "c" value for each media type independently?

Many thanks.

Br,
Marina

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Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - http://asipto.com/u/kat
Kamailio Advanced Training, Miami, USA, Nov 12-14, 2012 - http://asipto.com/u/katu

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