Interworking between the Session Initiation Protocol (SIP) and the Extensible Messaging and Presence Protocol (XMPP): Presence
RFC 8048

Document Type RFC - Proposed Standard (December 2016; No errata)
Obsoletes RFC 7248
Last updated 2016-12-28
Replaces draft-saintandre-stox-7248bis
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Saúl Corretgé
Shepherd write-up Show (last changed 2015-09-16)
IESG IESG state RFC 8048 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Ben Campbell
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IANA IANA review state Version Changed - Review Needed
IANA action state No IC
Internet Engineering Task Force (IETF)                    P. Saint-Andre
Request for Comments: 8048                                      Filament
Obsoletes: 7248                                            December 2016
Category: Standards Track
ISSN: 2070-1721

   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).  This document obsoletes RFC 7248.

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 7841.

   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/rfc8048.

Copyright Notice

   Copyright (c) 2016 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                  Standards Track                    [Page 1]
RFC 8048             SIP-XMPP Interworking: Presence       December 2016

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Intended Audience . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Architectural Assumptions . . . . . . . . . . . . . . . . . .   5
   5.  Presence Authorizations . . . . . . . . . . . . . . . . . . .   6
     5.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.2.  XMPP to SIP . . . . . . . . . . . . . . . . . . . . . . .   7
       5.2.1.  Requesting a Presence Authorization . . . . . . . . .   7
       5.2.2.  Refreshing a Notification Dialog  . . . . . . . . . .  11
       5.2.3.  Cancelling a Presence Authorization . . . . . . . . .  11
     5.3.  SIP to XMPP . . . . . . . . . . . . . . . . . . . . . . .  15
       5.3.1.  Requesting a Presence Authorization . . . . . . . . .  15
       5.3.2.  Refreshing a Notification Dialog  . . . . . . . . . .  18
       5.3.3.  Cancelling a Presence Authorization . . . . . . . . .  19
   6.  Notifications of Presence Information . . . . . . . . . . . .  19
     6.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .  19
     6.2.  XMPP to SIP . . . . . . . . . . . . . . . . . . . . . . .  20
     6.3.  SIP to XMPP . . . . . . . . . . . . . . . . . . . . . . .  25
   7.  Polling for Presence Information  . . . . . . . . . . . . . .  27
     7.1.  XMPP to SIP . . . . . . . . . . . . . . . . . . . . . . .  27
     7.2.  SIP to XMPP . . . . . . . . . . . . . . . . . . . . . . .  28
   8.  Privacy and Security Considerations . . . . . . . . . . . . .  28
     8.1.  Amplification Attacks . . . . . . . . . . . . . . . . . .  28
     8.2.  Presence Leaks  . . . . . . . . . . . . . . . . . . . . .  29
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  30
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  30
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  31
   Appendix A.  Changes from RFC 7248  . . . . . . . . . . . . . . .  33
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  34
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  34

Saint-Andre                  Standards Track                    [Page 2]
RFC 8048             SIP-XMPP Interworking: Presence       December 2016

1.  Introduction

   Presence is information about the availability of an entity (such as
   network availability or availability for communication).  Presence
   features in both SIP and XMPP involve several aspects:

   o  A long-lived authorization for a user to receive notifications
      about a contact's presence across presence and notification
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