Couple of things: (1) Lines in SDP *must* be either CRLF or LF terminated. In the answer there is no termination in the end (either \r\n or \n). Most implementations accept both CRLF and LF. May be you may want to check with Kapanga softphone.
v=0\no=Username 1275190391 1275192604 IN IP4 10.8.155.170\ns=MoTV [1275190391]\nc=IN IP4 10.8.155.170\nt=0 0\nm=audio 5290\nRTP/AVP 8 101\na=rtpmap:8 pcma/8000\na=sendrecv\na=rtcp:5291\na=maxptime:20\na=ptime:20\na=rtpmap:101 telephone-event/8000\na=fmtp:101 0-11,16\nm=video 5292 RTP/AVP 34\na=rtpmap:34 h263/90000\na=fmtp:34 QCIF=2\na=sendrecv\na=rtcp:5293 (2) There is an extra \n in the audio m= line. m=audio 5290\nRTP/AVP 8 101\n --------- You have m=audio 5290\n which should not be there. This fails the SDP grammer. Regards, Somesh -----Original Message----- From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of ext Bemali Wickramanayake Sent: Friday, June 04, 2010 9:13 AM To: sip-implementors@lists.cs.columbia.edu Subject: [Sip-implementors] SDP Negotiations fail Hi, I have made a custom SDP application using RTC client, and we are testing it with Kapanga softphone. The problem we encountered is that it fails when it comes to SDP negotiations. The sample SDPs we have used to negotiate were (Kapanga generates its own SDP) Offer: (from Kapanga) v=0 o=Username 1275190405 1275196871 IN IP4 10.8.148.173 s=Kapanga [1275190405] c=IN IP4 10.8.148.173 t=0 0 m=audio 5274 RTP/AVP 0 8 101 a=rtpmap:0 pcmu/8000 a=sendrecv a=rtcp:5275 a=maxptime:20 a=ptime:20 a=rtpmap:8 pcma/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15,36 m=video 5276 RTP/AVP 34 a=rtpmap:34 h263/90000 a=fmtp:34 QCIF=2 a=sendrecv a=rtcp:5277 Answer v=0\no=Username 1275190391 1275192604 IN IP4 10.8.155.170\ns=MoTV [1275190391]\nc=IN IP4 10.8.155.170\nt=0 0\nm=audio 5290\nRTP/AVP 8 101\na=rtpmap:8 pcma/8000\na=sendrecv\na=rtcp:5291\na=maxptime:20\na=ptime:20\na=rtpmap:101 telephone-event/8000\na=fmtp:101 0-11,16\nm=video 5292 RTP/AVP 34\na=rtpmap:34 h263/90000\na=fmtp:34 QCIF=2\na=sendrecv\na=rtcp:5293 I have included newline characters in order to facilitate the procedure of combining the entire SDP header into one CString. What's the wrong with above?? _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
