On Tue, Jun 24, 2008 at 6:37 PM, Pedro Gon?alves <pedro.pandre at gmail.com> wrote: > Hi > > I think we're making progress: > > Benny Prijono wrote: >> I think the rest is probably explained in the invite session's offer >> answer framework in the Dev Guide PDF. But okay here it goes. >> >> When sending subsequent offer, once you have the local SDP (either >> getting the active SDP from SDP negotiator in the invite session, or >> creating a fresh one from pjmedia_endpt), once again you'd need to >> call pjmedia_transport_encode_sdp() to let it put transport >> information in the offer. Then you'd send the SDP with >> pjsip_inv_update() or pjsip_inv_reinvite(). >> > OK, I was able to do so, getting the active SDP from the negotiator and > then calling > pjmedia_transport_encode_sdp(), pjsip_inv_reinvite() and > pjsip_inv_send_msg() >> When you receive subsequent incoming offer, the on_rx_offer() callback >> of the invite session is called. Again you'd create the local SDP and >> give it to pjmedia_transport_encode_sdp() along with the remote offer. >> Then give the SDP to pjsip_inv_set_sdp_answer() to be sent to the >> response (of the re-INVITE or UPDATE). >> > Here I am having a small problem: how do I know if the answer contains > ICE stuff? > Well, why do you need to know? You just need to give whatever SDPs you have to the media transport and it should "take care of everything". > Another problem is: > I can get the local SDP from the negotiator to use in > pjmedia_transport_encode_sdp. I will have to include the remote SDP from > the negotiator as well, right? Yep. > However, calling pjmedia_sdp_neg_set_local_answer throws an assert error: > PJ_ASSERT_RETURN(neg->state == PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER, > PJMEDIA_SDPNEG_EINSTATE); > > because neg->state is PJMEDIA_SDP_NEG_STATE_DONE. > Did I miss something? > Why would you call set_local_answer() to *get* the remote SDP? Cheers Benny > > Cheers > Pedro Gon?alves > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >
