Hi Biplab, I can't follow your question. :(
A CANCEL will only create if an INVITE was and the UAC received a provisional response. You can't cancel other methods like BYE, OPTIONS or REGISTER because no of this method will answer with an ACK after receiving a response. Markus [EMAIL PROTECTED] schrieb am 31.08.04 13:42:15: > > I just have one curiosity regarding canceling a transaction. RFC 3261 > says CANCEL SHOULD be used for canceling INVITE txns, I also know for > BYE it doesn't make sense. But in practice, is any of the UACs is using > CANCEL, in any situation, to cancel any other type of transaction. If > using, in what situation? > > Biplab. > > Markus Hofmann wrote: > > >Yes, that's make sense for me too > > > >I refer to section 9.2 Server behavior: > > > >If the UAS has not issued a final response for the original request, its behavior > >depends on the method of the original request. If the original request was an > >INVITE, the UAS SHOULD immediately respond to the INVITE with a 487 (Request > >Terminated). A CANCEL request has no impact on the processing of transactions with > >any other method defined in this specification. > > > >Greeting > > > >Markus > > > >[EMAIL PROTECTED] schrieb am 31.08.04 12:16:10: > > > > > >>Hi, > >>The following excerpt from rfc 3261 (Section 9.1) makes it clear: > >> > >> "Note that both the transaction corresponding to the original request > >> and the CANCEL transaction will complete independently. However, a > >> UAC canceling a request cannot rely on receiving a 487 (Request > >> Terminated) response for the original request, as an RFC 2543- > >> compliant UAS will not generate such a response. If there is no > >> final response for the original request in 64*T1 seconds (T1 is > >> defined in Section 17.1.1.1), the client SHOULD then consider the > >> original transaction cancelled and SHOULD destroy the client > >> transaction handling the original request." > >> > >>-- Hope this makes the things clear - why 487 did not arrive. > >> > >>Biplab. > >> > >>Markus Hofmann wrote: > >> > >> > >> > >>>Hi Sam, > >>> > >>>I think to send a "487 Request Terminated" is a SHOULD and not a MUST. > >>> > >>>Greeting > >>> > >>>Markus > >>> > >>>sam n <[EMAIL PROTECTED]> schrieb am 31.08.04 03:42:20: > >>> > >>> > >>> > >>> > >>>>Hello, > >>>> > >>>>I need to cancel an INVITE that was just sent, and am trying the > >>>>method indicated in RFC 3261. Below is a small log of the SIP messages > >>>>sent/received. > >>>> > >>>> > >>>><send INVITE> > >>>> > >>>>INVITE sip:[EMAIL PROTECTED] SIP/2.0 > >>>>Call-ID: [EMAIL PROTECTED] > >>>>CSeq: 590812 INVITE > >>>>From: <sip:[EMAIL PROTECTED]>;tag=1508783231-1592972684 > >>>>To: "1001" <sip:[EMAIL PROTECTED]> > >>>>Via: SIP/2.0/UDP 192.168.0.16:1099 > >>>>Max-Forwards: 70 > >>>>Contact: "gernot" <sip:[EMAIL PROTECTED]:1099> > >>>>User-Agent: C12 Phone > >>>>Allow: ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,UPDATE,NOTIFY > >>>>Content-Type: application/sdp > >>>>Content-Length: 159 > >>>> > >>>>// sdp body > >>>> > >>>><receive TRYING> > >>>> > >>>>SIP/2.0 100 Trying > >>>>Via: SIP/2.0/UDP > >>>>192.168.0.16:1099;branch=z9hG4bK2a812a1942f6c5e7081b1c7505d45b8c > >>>>From: <sip:[EMAIL PROTECTED]>;tag=1508783231-1592972684 > >>>>To: "1001" <sip:[EMAIL PROTECTED]> > >>>>Call-ID: [EMAIL PROTECTED] > >>>>CSeq: 590812 INVITE > >>>>Content-Length: 0 > >>>> > >>>> > >>>><receive RINGING> > >>>> > >>>>SIP/2.0 180 Ringing > >>>>Via: SIP/2.0/UDP > >>>>192.168.0.16:1099;branch=z9hG4bK2a812a1942f6c5e7081b1c7505d45b8c > >>>>From: <sip:[EMAIL PROTECTED]>;tag=1508783231-1592972684 > >>>>To: "1001" <sip:[EMAIL PROTECTED]>;tag=1229238695-1093914397502 > >>>>Call-ID: [EMAIL PROTECTED] > >>>>CSeq: 590812 INVITE > >>>>Allow: ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,UPDATE,NOTIFY > >>>>Supported: 100rel > >>>>Contact: <sip:192.168.0.170:5060> > >>>>Remote-Party-ID: "Jill > >>>>Tester"<sip:[EMAIL > >>>>PROTECTED];user=phone>;screen=yes;party=called;privacy=off;id-type=subscriber > >>>>Content-Length: 0 > >>>> > >>>> > >>>><send CANCEL> > >>>> > >>>>CANCEL sip:[EMAIL PROTECTED] SIP/2.0 > >>>>Call-ID: [EMAIL PROTECTED] > >>>>CSeq: 590812 CANCEL > >>>>From: <sip:[EMAIL PROTECTED]>;tag=1508783231-1592972684 > >>>>To: "1001" <sip:[EMAIL PROTECTED]> > >>>>Via: SIP/2.0/UDP 192.168.0.16:1099 > >>>>Max-Forwards: 70 > >>>>User-Agent: C12 Phone > >>>>Contact: "gernot" <sip:[EMAIL PROTECTED]:1099> > >>>>Content-Length: 0 > >>>> > >>>><receive OK for CANCEL> > >>>> > >>>>SIP/2.0 200 OK > >>>>Via: SIP/2.0/UDP > >>>>192.168.0.16:1099;branch=z9hG4bK4f4ef2cc44a8b287fda3dd08df6fdebd > >>>>From: <sip:[EMAIL PROTECTED]>;tag=1508783231-1592972684 > >>>>To: "1001" <sip:[EMAIL PROTECTED]> > >>>>Call-ID: [EMAIL PROTECTED] > >>>>CSeq: 590812 CANCEL > >>>>Content-Length: 0 > >>>> > >>>>However, after this, i do not receive a 487 Request Terminated > >>>>response, and the remote user's phone proceeds to ring. > >>>> > >>>>Could anyone kindly tell me where i'm going wrong. > >>>> > >>>>Thanks in advance. > >>>> > >>>>Regards, > >>>>Sam > >>>>_______________________________________________ > >>>>Sip-implementors mailing list > >>>>[EMAIL PROTECTED] > >>>>http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > >>>> > >>>> > >>>> > >>>> > >>>________________________________________________________________ > >>>Verschicken Sie romantische, coole und witzige Bilder per SMS! > >>>Jetzt neu bei WEB.DE FreeMail: http://freemail.web.de/?mc=021193 > >>> > >>>_______________________________________________ > >>>Sip-implementors mailing list > >>>[EMAIL PROTECTED] > >>>http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > >>> > >>> > >>> > >>> > >>-- > >>---------------------------------------------------------------------------- > >>Biplab Chattopadhyay > >>Research Engineer > >>CDOT-Bangalore > >>email: [EMAIL PROTECTED] > >> [EMAIL PROTECTED] > >>Phone# > >> Office: 2263399, ext 255 > >> 2383951 (direct) > >> Mobile: 9845378867 > >>---------------------------------------------------------------------------- > >> > >> > >> > >> > > > > > >____________________________________________________ > >Aufnehmen, abschicken, nah sein - So einfach ist > >WEB.DE Video-Mail: http://freemail.web.de/?mc=021200 > > > > > > > > -- > ---------------------------------------------------------------------------- > Biplab Chattopadhyay > Research Engineer > CDOT-Bangalore > email: [EMAIL PROTECTED] > [EMAIL PROTECTED] > Phone# > Office: 2263399, ext 255 > 2383951 (direct) > Mobile: 9845378867 > ---------------------------------------------------------------------------- > > ____________________________________________________ Aufnehmen, abschicken, nah sein - So einfach ist WEB.DE Video-Mail: http://freemail.web.de/?mc=021200 _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
