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Interworking between the Session Initiation Protocol (SIP) and the Extensible Messaging and Presence Protocol (XMPP): Presence
RFC 7248

Internet Engineering Task Force (IETF)                    P. Saint-Andre
Request for Comments: 7248                                          &yet
Category: Standards Track                                       A. Houri
ISSN: 2070-1721                                                      IBM
                                                           J. Hildebrand
                                                     Cisco Systems, Inc.
                                                                May 2014

   Interworking between the Session Initiation Protocol (SIP) and the
      Extensible Messaging and Presence Protocol (XMPP): Presence

Abstract

   This document defines a bidirectional protocol mapping for the
   exchange of presence information between the Session Initiation
   Protocol (SIP) and the Extensible Messaging and Presence Protocol
   (XMPP).

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7248.

Copyright Notice

   Copyright (c) 2014 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
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   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.

Saint-Andre, et al.          Standards Track                    [Page 1]
RFC 7248             SIP-XMPP Interworking: Presence            May 2014

Table of Contents

   1. Introduction ....................................................2
   2. Intended Audience ...............................................3
   3. Terminology .....................................................3
   4. Subscriptions to Presence Information ...........................4
      4.1. Overview ...................................................4
      4.2. XMPP to SIP ................................................5
           4.2.1. Establishing a Presence Subscription ................5
           4.2.2. Refreshing a Presence Subscription ..................9
           4.2.3. Cancelling a Presence Subscription .................10
      4.3. SIP to XMPP ...............................................12
           4.3.1. Establishing a Presence Subscription ...............12
           4.3.2. Refreshing a Presence Subscription .................14
           4.3.3. Cancelling a Presence Subscription .................17
   5. Notifications of Presence Information ..........................17
      5.1. Overview ..................................................17
      5.2. XMPP to SIP ...............................................19
      5.3. SIP to XMPP ...............................................22
   6. Requests for Presence Information ..............................24
      6.1. XMPP to SIP ...............................................24
      6.2. SIP to XMPP ...............................................25
   7. Security Considerations ........................................26
   8. References .....................................................27
      8.1. Normative References ......................................27
      8.2. Informative References ....................................27
   Appendix A. Acknowledgements ......................................29

1.  Introduction

   In order to help ensure interworking between presence systems that
   conform to the instant message / presence requirements [RFC2779], it
   is important to clearly define protocol mappings between such
   systems.  Within the IETF, work has proceeded on two presence
   technologies:

   o  Various extensions to the Session Initiation Protocol ([RFC3261])
      for presence, in particular [RFC3856]

   o  The Extensible Messaging and Presence Protocol (XMPP), which
      consists of a formalization of the core XML streaming protocols
      developed originally by the Jabber open-source community; the
      relevant specifications are [RFC6120] for the XML streaming layer

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