I think it will send 200 OK to CANCEL first, to let UAC know that it has received it, and then act on Cancel request and send 487 for Invite.
Sanjay PS: I moved this to sip-implementors, where it's more appropriate. >-----Original Message----- >From: Stephen McVarnock [mailto:[EMAIL PROTECTED] >Sent: Tuesday, May 15, 2007 9:58 AM >To: [EMAIL PROTECTED] >Subject: [Sip] UAS behaviour in response to a CANCEL request > >Hi folks, > If a UAC sends a CANCEL request to the UAS, is the UAS >under any obligation for the order in which it sends it's >responses? i.e.:- > >It must send the 200 OK for the CANCEL before it sends the 487 >for the INVITE request. > >or > >It must send the 487 to the INVITE before it sends the 200 OK >for the CANCEL request. > >Having a look at section 9 of RFC 3261, it makes no mention of >this which I assume implies that either situation should be >dealt is acceptable. > >Thanks in advance for any help supplied. > >Regards, > Steve > > > >-- > > >*********************************************************************** >* Stephen McVarnock * Email: [EMAIL PROTECTED] * >* Senior Software Developer * WWW : http://www.aepona.com * >* Aepona Ltd., * Phone: +44 (0)28 9026 9114 * >* Interpoint Building, * Fax : +44 (0)28 9026 9111 * >* 20-24 York Street, * * >* Belfast. BT15 1AQ * * >* N. Ireland * * >*********************************************************************** > > > >_______________________________________________ >Sip mailing list https://www1.ietf.org/mailman/listinfo/sip >This list is for NEW development of the core SIP Protocol Use >[email protected] for questions on current sip >Use [EMAIL PROTECTED] for new developments on the application of sip > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
