[Kamailio-Users] no RTP randomly with rtpproxy

[Daniel-Constantin Mierla]

Hello,

does the caller SDP come with a public IP? Otherwise, rtpproxy learns 
the media IP when first rtp packet is sent.

Cheers,
Daniel


On 09.07.2009 23:00 Uhr, Samuel Muller wrote:
> A strange thing happens with RTP proxy since I compiled the v.1.2.0 
> release ...
>
> Radomly, (approx. 1 time per 10 calls) RTP proxy don't grab the 
> caller's original source IP in the SDP ???
> So I don't have any RTP, so no sound during the call.
>
> typical call schema :
> sip phone -> mitel ipbx -> kamailio -> audiocodes mediant 2000 -> pstn
>
> All the SIP headers and the SDP are ok each time ... the RTP ports are 
> ok too, understood at each point.
> rtp proxy is launched with these options with a public IP address (and 
> compiled with a modified port range) :
> /usr/sbin/rtpproxy -s udp:77.246.81.133 35000 -u rtpproxy rtpproxy -p 
> /var/run/rtpproxy/rtpproxy.pid -l 77.246.81.133 -m 6000 -M 64000
> kamailio is ok too in the config : kamailio  IPv4   UDP 
> sip.720.fr:46830->rtpproxy.720.fr:35000 <http://rtpproxy.720.fr:35000/>
>
> logs of RTP proxy (option -f to screen the debug) :
>
> # rtp ok :
>
> received command "29638_4 L 3962688592-61598521 at 10.33.146.4 
> <mailto:3962688592-61598521 at 10.33.146.4> 77.246.81.136 35000 
> 0_3962688592-61598523;1 1c1320846358;1"
> lookup on ports 6008/6010, session timer restarted
> pre-filling callee's address with 77.246.81.136:35000 
> <http://77.246.81.136:35000/>
> sending reply "29638_4 6010 77.246.81.133
> "
> caller's address filled in: 94.198.149.41:50186 
> <http://94.198.149.41:50186/> (RTP)
> guessing RTCP port for caller to be 50187
>
> # rtp not ok :
>
> received command "29571_2 L 3288148592-61598465 at 10.33.146.4 
> <mailto:3288148592-61598465 at 10.33.146.4> 77.246.81.136 35000 
> 0_3288148592-61598467;1 1c934295778;1"
> lookup on ports 6000/6002, session timer restarted
> pre-filling callee's address with 77.246.81.136:35000 
> <http://77.246.81.136:35000/>
> sending reply "29571_2 6002 77.246.81.133
> "
>
> and hop, no "caller's address filled in" ...
>
> it's exactly the same type a SIP call (with the same ip phone, etc...).
> I can precise that rtp proxy is running on the same machine that 
> kamailio (v.1.4.4), but listen on a dedicated sub-if.
>
> Does someone knows something about that ? thanks !
>
>
> .Samuel Muller.
> sml at 720.fr <mailto:sml at 720.fr>
> ------------------------------------------------------------------------
>
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-- 
Daniel-Constantin Mierla
http://www.asipto.com/