Hi
Refer Sec "3.2.4. Subscriber NOTIFY Behavior" of RFC 3265: Upon receiving a NOTIFY request, the subscriber should check that it matches at least one of its outstanding subscriptions; if not, it MUST return a "481 Subscription does not exist" response unless another 400- or 500-class response is more appropriate. The rules for matching NOTIFY requests with subscriptions that create a new dialog are described in section 3.3.4. Notifications for subscriptions which were created inside an existing dialog match if they are in the same dialog and the "Event" headers match (as described in section 7.2.1.) Also refer Sec "3.3.4. Dialog creation and termination" of same RFC: If an initial SUBSCRIBE request is not sent on a pre-existing dialog, the subscriber will wait for a response to the SUBSCRIBE request or a matching NOTIFY. Responses are matched to such SUBSCRIBE requests if they contain the same the same "Call-ID", the same "From" header "tag", and the same "CSeq". Rules for the comparison of these headers are described in SIP [1]. If a 200-class response matches such a SUBSCRIBE request, it creates a new subscription and a new dialog (unless they have already been created by a matching NOTIFY request; see below). NOTIFY requests are matched to such SUBSCRIBE requests if they contain the same "Call-ID", a "To" header "tag" parameter which matches the "From" header "tag" parameter of the SUBSCRIBE, and the same "Event" header field. This indicates the possibility of sending 481 response. Regards Rohit Aggarwal Technical Leader Extn 5126 -----Original Message----- From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of hanifa.mohammed Sent: Friday, May 29, 2009 10:22 AM To: sip-implementors@lists.cs.columbia.edu Subject: [Sip-implementors] Subscription is done for 'presence'. But NOTIFYrecd with event header 'reg' (or/and) 'presence'. What err resp? Hi all, A SUBS req for event 'presence' is sent to Server. Server sends a NOTIFY with event 'reg'. Here, the dialog id (callid, from and to tag) matches exactly, but Event is different. What error response has to be sent by the client for NOTIFY? 481 or 489 or xxx? I guess, 481 means tht the dialog itself does not exist (the callid, from tag and to tag does not match all) and the Server will clean up the subscription. But, the client side maintains it. So, 481 shall not be sent. 489 seems to be opt. Pl suggest. Best Regards, Mohammed Hanifa _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors ________________________________ "DISCLAIMER: This message is proprietary to Aricent and is intended solely for the use of the individual to whom it is addressed. It may contain privileged or confidential information and should not be circulated or used for any purpose other than for what it is intended. If you have received this message in error,please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from using, copying, altering, or disclosing the contents of this message. Aricent accepts no responsibility for loss or damage arising from the use of the information transmitted by this email including damage from virus." _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
