An 2543 compliant implementation does not carry the branch parameter in that case the response matching must be as defined in Rfc2543.
Hence its perfectly OK to send INVITE without branch parameter in VIA header.... In this case the response matching would be as described in 2543... -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Pramodh N Sent: Tuesday, August 31, 2004 1:20 PM To: Vivek Srivastava (WT01 - TELECOM & INTER-NETWORKING SOLUTIONS) Cc: [EMAIL PROTECTED] Subject: Re: [Sip-implementors] Canceling a pending INVITE Hi folks, I have a query about this scenario. What if the INVITE message I am recieving doesn't have a branch parameter in the Via header and the I am receiving the CANCEL message without branch parameter. I am facing such a scenario. Any help will be appreciated. With best regards. [EMAIL PROTECTED] wrote: >I think branch parameter is required in Via. > >Vivek > > >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of sam n >Sent: Tuesday, August 31, 2004 6:40 AM >To: [EMAIL PROTECTED] >Subject: [Sip-implementors] Canceling a pending INVITE > > >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;priv a >cy=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 > > > >Confidentiality Notice > >The information contained in this electronic message and any attachments to this message are intended >for the exclusive use of the addressee(s) and may contain confidential or privileged information. If >you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately >and destroy all copies of this message and any attachments. > >_______________________________________________ >Sip-implementors mailing list >[EMAIL PROTECTED] >http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > > _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments. _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
