SIP-Specific Event Notification
draft-ietf-sipcore-rfc3265bis-07

The information below is for an old version of the document
Document Type Active Internet-Draft (sipcore WG)
Last updated 2012-04-05 (latest revision 2012-02-27)
Replaces draft-roach-sipcore-rfc3265bis
Stream IETF
Intended RFC status Proposed Standard
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Responsible AD Robert Sparks
IESG note Paul Kyzivat (pkyzivat@alum.mit.edu) is the document shepherd.
Send notices to sipcore-chairs@tools.ietf.org, draft-ietf-sipcore-rfc3265bis@tools.ietf.org
Network Working Group                                        A. B. Roach
Internet-Draft                                                   Tekelec
Obsoletes: 3265 (if approved)                          February 27, 2012
Updates: 4660 (if approved)
Intended status: Standards Track
Expires: August 30, 2012

                    SIP-Specific Event Notification
                    draft-ietf-sipcore-rfc3265bis-07

Abstract

   This document describes an extension to the Session Initiation
   Protocol (SIP).  The purpose of this extension is to provide an
   extensible framework by which SIP nodes can request notification from
   remote nodes indicating that certain events have occurred.

   Note that the event notification mechanisms defined herein are NOT
   intended to be a general-purpose infrastructure for all classes of
   event subscription and notification.

   This document represents a backwards-compatible improvement on the
   original mechanism described by RFC 3265, taking into account several
   years of implementation experience.  Accordingly, this document
   obsoletes RFC 3265.  This document also updates RFC 4660 slightly to
   accommodate some small changes to the mechanism that were discussed
   in that document.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 30, 2012.

Copyright Notice

Roach                    Expires August 30, 2012                [Page 1]
Internet-Draft       SIP-Specific Event Notification       February 2012

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  5
     1.1.  Overview of Operation  . . . . . . . . . . . . . . . . . .  5
     1.2.  Documentation Conventions  . . . . . . . . . . . . . . . .  6
   2.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  6
   3.  SIP Methods for Event Notification . . . . . . . . . . . . . .  7
     3.1.  SUBSCRIBE  . . . . . . . . . . . . . . . . . . . . . . . .  7
       3.1.1.  Subscription Duration  . . . . . . . . . . . . . . . .  7
       3.1.2.  Identification of Subscribed Events and Event
               Classes  . . . . . . . . . . . . . . . . . . . . . . .  8
       3.1.3.  Additional SUBSCRIBE Header Field Values . . . . . . .  9
     3.2.  NOTIFY . . . . . . . . . . . . . . . . . . . . . . . . . .  9
       3.2.1.  Identification of Reported Events, Event Classes,
               and Current State  . . . . . . . . . . . . . . . . . .  9
   4.  Node Behavior  . . . . . . . . . . . . . . . . . . . . . . . . 10
     4.1.  Subscriber Behavior  . . . . . . . . . . . . . . . . . . . 10
       4.1.1.  Detecting Support for SIP Events . . . . . . . . . . . 10
       4.1.2.  Creating and Maintaining Subscriptions . . . . . . . . 10
       4.1.3.  Receiving and Processing State Information . . . . . . 14
       4.1.4.  Forking of SUBSCRIBE Requests  . . . . . . . . . . . . 16
     4.2.  Notifier Behavior  . . . . . . . . . . . . . . . . . . . . 17
       4.2.1.  Subscription Establishment and Maintenance . . . . . . 17
       4.2.2.  Sending State Information to Subscribers . . . . . . . 20
       4.2.3.  PINT Compatibility . . . . . . . . . . . . . . . . . . 23
     4.3.  Proxy Behavior . . . . . . . . . . . . . . . . . . . . . . 23
     4.4.  Common Behavior  . . . . . . . . . . . . . . . . . . . . . 23
       4.4.1.  Dialog Creation and Termination  . . . . . . . . . . . 24
       4.4.2.  Notifier Migration . . . . . . . . . . . . . . . . . . 24
       4.4.3.  Polling Resource State . . . . . . . . . . . . . . . . 25
       4.4.4.  Allow-Events header field usage  . . . . . . . . . . . 26
     4.5.  Targeting Subscriptions at Devices . . . . . . . . . . . . 26
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