[OpenSIPS-Users] How to fix contact info and RTP port in SDP? Is fix_nated_sdp function enough?

[Rodrigo Pimenta Carvalho]

Dear OpenSIPS-users,


Two clients of my OpenSIPS are located behind different NATs and I have just started to search a way to mangles the SDP messages for both of them in a way that will make the parties talk directly with each other (direct media). After reading the proxy documentation (modules NATHELPER, STUN, MEDIAPROXY and NAT_TRAVERSAL) I have found the function fix_nated_sdp.


However, it seems that such function replaces the original contact IP, but not the RTP ports.

So I ask: what is the utility of the function fix_nated_sdp, if it fixes the contact info, but not the port? I mean, how can I fix the SDP in a way that contact info and RTP port will be valid to send media to a peer that is behind a NAT?


Any hint will be very very helpful!!


Best regards.



RODRIGO PIMENTA CARVALHO
Inatel Competence Center
Software
Ph: +55 35 3471 9200 RAMAL 979
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