[OpenSIPS-Users] Force media through the Opensips server

[TeleCube - John]

Hi Adam,

Thanks, the fog is starting to lift now...  :-)

I'll make some changes and come back with results shortly.

Cheers,
John

Adam Twardowski wrote:
> John,
>
> The o= is the Origin IP, which doesn't really matter, the c= is the 
> connection IP, which is the important one.  You probably want to use 
> force_rtp_proxy() to rewrite the sdp and make it go through the 
> rtpproxy, and in your asterisk SIP peer, you can either set the peer 
> IP to 4.5.6.7 and have your proxy re-write the RURI to 1.2.3.4 and 
> relay it along, or you could set outboundproxy=4.5.6.7 in sip.conf on 
> your sip peer and just have opensips relay it.  You may also need to 
> setup an on-reply route to capture 180/183 messages with SDP and 
> rewrite the IP's in there too.
>
> --Adam
>
> On Fri, Aug 27, 2010 at 10:45 PM, TeleCube - John 
> <john at telecube.com.au <mailto:john at telecube.com.au>> wrote:
>
>     Hi Max,
>
>     Thanks for your reply.
>
>     I have rtpproxy running and I think it's all configured ok.
>
>     I can use fix_nated_sdp() with flags and see the changes in the
>     sdp lines in the packets.
>
>     What I am struggling with is just how to go about telling the
>     asterisk server and the outbound route that all traffic is to run
>     through my proxy
>
>     I'm not sure what the purpose of the o= and c= lines are and at
>     which stage in the packet flow I need to re-write which lines.
>
>     If anyone can offer any pointers that will be awesome.
>
>     Kind regards,
>     John
>
>
>     Max Mühlbronner wrote:
>>       Hello,
>>
>>     Yes, the opensips will rewrite the sdp like you said, so it will contain 
>>     the ip of the rtpproxy (or mediaproxy).  It can be used to proxy the rtp 
>>     traffic to a specific destination.
>>
>>     But the rtpproxy does not necessarily have to be the same machine as 
>>     your Opensips. The rtpproxy is a different tool which will be enabled by 
>>     setting the relevant modparam settings and also calling the rtpproxy in 
>>     your routing-script.
>>
>>     http://voiprookie.blogspot.com/2009/04/rtpproxy-12x-installation.html
>>
>>     maybe there are also other, better tutorials but this link seems to be a 
>>     good start for setting up rtpproxy with opensips.
>>
>>
>>     BR
>>
>>     Max M.
>>
>>
>>     Am 27.08.2010 15:36, schrieb TeleCube - John:
>>       
>>>     Hi,
>>>
>>>     I have a setup as follows:
>>>
>>>     1.2.3.4 - Outbound Route
>>>     4.5.6.7 - Opensips proxy
>>>     4.5.6.8 - Asterisk server
>>>
>>>     The outbound route will only allow any traffic, signaling and media, via
>>>     the 4.5.6.7 IP address. It cannot currently accept media from a
>>>     different ip than the signaling.
>>>
>>>     Currently the astx server sends media direct to the outbound route.
>>>
>>>     Signaling is fine but I need to force the media stream from the asterisk
>>>     server through the opensips proxy.
>>>
>>>     Am I correct in expecting that nathelper/rtpproxy can do this?
>>>
>>>     Is it simply a matter of re-writing the sdp detail that will tell the
>>>     asterisk server to route media through the opensips ip address?
>>>
>>>     Any examples will be greatly appreciated.
>>>
>>>     Thanks,
>>>     John
>>>
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>
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