RFC 3680 (rfc3680) - Page 1 of 26

A Session Initiation Protocol (SIP) Event Package for Registrations

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Network Working Group                                       J. Rosenberg
Request for Comments: 3680                                   dynamicsoft
Category: Standards Track                                     March 2004


  A Session Initiation Protocol (SIP) Event Package for Registrations

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).  All Rights Reserved.

Abstract

   This document defines a Session Initiation Protocol (SIP) event
   package for registrations.  Through its REGISTER method, SIP allows a
   user agent to create, modify, and delete registrations.
   Registrations can also be altered by administrators in order to
   enforce policy.  As a result, these registrations represent a piece
   of state in the network that can change dynamically.  There are many
   cases where a user agent would like to be notified of changes in this
   state.  This event package defines a mechanism by which those user
   agents can request and obtain such notifications.

Table of Contents

   1.  Introduction .................................................  2
   2.  Terminology ..................................................  3
   3.  Usage Scenarios ..............................................  3
       3.1.  Forcing Re-Authentication ..............................  3
       3.2.  Composing Presence .....................................  3
       3.3.  Welcome Notices ........................................  4
   4.  Package Definition ...........................................  4
       4.1.  Event Package Name .....................................  4
       4.2.  Event Package Parameters ...............................  5
       4.3.  SUBSCRIBE Bodies .......................................  5
       4.4.  Subscription Duration ..................................  5
       4.5.  NOTIFY Bodies ..........................................  6
       4.6.  Notifier Processing of SUBSCRIBE Requests ..............  6
       4.7.  Notifier Generation of NOTIFY Requests .................  7
             4.7.1.  The Registration State Machine .................  7



Rosenberg                   Standards Track
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