Paul Kyzivat wrote: > Here is my attempt at summarizing the discussion conclusions: > > Normative things (stated or implied in existing RFCs): > > - If the UAC sent an offer in the INVITE, then after it receives SDP > (the answer) in a reliable response to the INVITE, any SDP in subsequent > responses to the INVITE MUST be ignored. > > - Further, if SDP is received in an unreliable response to the invite > prior to receiving SDP in a reliable response, then it MUST be treated > as the answer for purposes of media processing, but not for purposes of > determining when another offer may be sent or received. > > - if the UAS receives an offer in the INVITE, it MUST NOT include SDP in > any response it sends until it has determined the intended answer SDP to > the offer. > > - once the intended answer SDP is determined, it MUST be sent in a > reliable response to the INVITE. It MAY be sent in one or more > *preceding* unreliable provisional responses. > > Non-normative, best practice suggestions: > > - if the UAS receives an offer in the invite, once it has sent the > answer in a reliable response, it should not send any SDP in subsequent > responses to the INVITE. I think you've got it, yes. -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA skype: kpfleming | jabber: kfleming@xxxxxxxxxx Check us out at www.digium.com & www.asterisk.org _______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP
