If INVITE indicated support for 100rel within Supported or Require, see RFC 3262 section 5.
> -----Original Message----- > From: [email protected] [mailto:sip- > [email protected]] On Behalf Of Nitin Kapoor > Sent: Thursday, June 10, 2010 1:54 PM > To: [email protected] > Subject: [Sip-implementors] Invite without SDP & getting 100rel in 18x > > Dear All, > > > > I have a call flow like this. > > > > UAC(SIP) -----> Invite/without SDP ------> B2BUA -----Invite/with SDP > default port-----> UAS(SIP) > > > > Now as far as I know what RFC says that: > > > > "The initial offer MUST be in either an INVITE or, if not there, in the > first reliable non-failure message from the UAS back to the UAC. In > this > specification, that is the final 2xx response" > > > > Here is what happening at my case that my source UA is sending me > invite > without SDP to my SBC and my SBC is forwarding the same to termination > UA > with default port as per the design. > > > > But from Termination side I am getting first 183 w/o SDP and others 2 > with > SDP before getting 200 OK w/ SDP in the correspondence of initial offer > INVITE. > > > > And in those 183 I am getting "100rel" in REQUIRE header field which is > not > correct according to me. Because my understanding says that in those > scenario where you are getting initial OFFER w/o SDP, PRACK should be > not > be negotiate before getting the 200 OK w/ SDP for the initial invite. > Hence > I am facing the media issue. > > > > Now I might be wrong too...Could any please help me on this and if need > the > traces then I can also share. > > > > Thanks, > > Nitin Kapoor > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
