[SR-Users] rtpproxy / sdp / problem with signalling

[Carsten Bock]

Hi,

this may make your config a little more tricky:
You could instruct the RTPProxy/Mediaproxy-ng to "Trust" the IP in the
SDP for the Originating call to PSTN and the Freeswitch (add "r" the
flags).
Have you verified/checked, that rtpproxy_manage() is really called for
both the 183 and the 200 OK?

Thanks,
Carsten


2013/11/28 Oliver Roth <oliver.roth at triotel.ch>:
> Problem with signalling - RTP gets lost!
> Rtpproxy not working properly?
>
> I am absolutely stuck ... cause this happens in a live environement.
>
> I have the following situation
>
> A calls B over carrier 1 - number is not valid and I get back error 404 from carrier and now freeswitch should play a message saying: "number not valid".
> But from carrier 1 I get back an RTP stream that is useless [1] - and if the correct streams opens from freeswitch - this does not get back to A [2].
>
> I tested with rtpproxy on Kamailio - and all the rtp streams arrive at the Kamailio - but they cannot be "connected" correctly.
>
> I guess the problem is the 183 I get back from carrier 1 - after whitch rtp is opened.
> Or there is a wrong sdp singallisation if the "correct" stream arrives [3].
>
> Sorry - I cannot get a solution - but I could provide various tcpdumps and pcaps.
>
>
>
> A               Kamailio                Carrier 1       Freeswitch
>
> INVITE
> --------------------->
> 100 Your call is important
> <---------------------
>                         INVITE
>                         ------------------------>
>                         100 Trying
>                         <------------------------
>                         183 Session Progress SDP
>                         <------------------------
> 183 Session Progress SDP
> <------------------------
>                         RTP
>                         <=================
> RTP
> <=================
> RTP
> =================>
>                         RTP
>                         =================>                              [1]
>
>                         404 not found
>                         <---------------------------
>                         ACK
>                         ---------------------------->
>
>                         INVITE
>                         --------------------------------------------------------->
>                         100 Trying
>                         <--------------------------------------------------------
>                         200 OK SDP
>                         <--------------------------------------------------------       [3]
> 200 OK SDP
> <---------------------------
>                         RTP (Announcment - number not valid")           [2]
>                         <===================================
> ACK
> ---------------------------->
>                         ACK
>                         ---------------------------------------------------------->
> INFO
> ---------------------------->
>                         INFO
>                         ---------------------------------------------------------->
>                         200 OK
>                         <--------------------------------------------------------
> 200 OK
> <---------------------------
> BYE
> ---------------------------->
>                         BYE
>                         ---------------------------------------------------------->
>                         200 OK
>                         <--------------------------------------------------------
> 200 OK
> <---------------------------
>
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