On Tue, Apr 20, 2010 at 3:47 PM, Paul Kyzivat <pkyzivat@xxxxxxxxx> 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. > [HE] I miss what the UAC should do in this case for subsequent responses, does the following hold as well: "If the UAC sent an offer in the INVITE, then after it receives SDP (the answer) in an unreliable response to the INVITE, any SDP in subsequent responses to the INVITE MUST be ignored/granted/... ." ? Regardless what the correct behaviour is, it is missing in your summary. > - 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. _______________________________________________ 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
