[OpenSIPS-Users] What is the module to fix SDP ?
Rodrigo Pimenta Carvalho
pimenta at inatel.br
Wed Mar 30 19:57:33 CEST 2016
I have a case when a peer answering a call (INVITE) is behind a NAT.
So, in its SIP OK message I would like to see the SDP containing a valid IP and media Port valid to receive audio from the caller. That is, the caller need to know a valid IP and Port where he/she can send his/her audio packets.
1 - Is it possible to "fix" SDP content for such objective?
2 - Can OpenSIPS do something for this idea works or must I to use something more like a stun server?
3 - What is the OpenSIPS module that can help me with this task?
I guess I will have to fix 2 fiels in SDP:
Media Description, name and address (m): audio 55142 RTP/AVP 8 101 ( to fix the port)
Connection Information (c): IN IP4 192.168.100.156 ( to fix the IP)
P.S.: I have already a solution (opensips.cfg) that let SIP messages cross NATs without problems. Only SDP has to be fixed.
Any hint will be very helpful!
RODRIGO PIMENTA CARVALHO
Inatel Competence Center
Ph: +55 35 3471 9200 RAMAL 979
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