Hi, I'm in the process of writing an application that uses PJSIP and should have a greater degree of control over the SDP by manually generating the structs involved and passing them to PJSIP. This holds for an original INVITE as well as for re-INVITEs. I was looking at how re-INVITEs are handled in sip_inv.c and from what I could see the callback asking for a SDP response does get called (rx_offer), but the callback needs to set a new SDP answer immediately which is then automatically sent in a 200 OK response (or a 500 if the SDP negotiation fails). How I would want my endpoint to behave is to send a provisional response (180) in reply to a re-INVITE, present the new SDP to the user somehow and wait for his/her input before sending a SDP response in a 200 or maybe even some 4xx if the user does not agree. The scenario for this would be useful for example for adding a stream to an existing session. My question is what is the best way to get the code in sip_inv.c to behave in this fashion? I'm sure I could modify it to fit my needs, but maybe there needs to be some consensus about this. Is this behaviour wanted by more people? Ruud Klaver AG Projects
