Hi,
I'm trying to use the SDP negotiation part of pjmedia to process SDP
related to MSRP (RFC 4975), but ran into some issues when it tried to
complete the negotiation procedure. The process_m_answer function
assumes that the formats in the m= line are integers and starts
looking for rtpmap attributes, while for MSRP the formats aren't
actually used and are set to a single "*".
Maybe there should be a check to see if the protocol field (called
transport in pjsip) starts with RTP, as RFC 4566 states:
If the <proto> sub-field is "RTP/AVP" or "RTP/SAVP" the <fmt>
sub-fields contain RTP payload type numbers.
But also:
If the <proto> sub-field is "udp" the <fmt> sub-fields MUST
reference a media type describing the format under the "audio",
"video", "text", "application", or "message" top-level media
types.
...
For media using other transport protocols, the <fmt> field is
protocol specific.
But then the question is, how would pjmedia declare the negotiation to
have succeeded?
Ruud Klaver
AG Projects
