Interworking between the Session Initiation Protocol (SIP) and the Extensible Messaging and Presence Protocol (XMPP): One-to-One Text Chat Sessions
draft-ietf-stox-chat-05

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Document Type Active Internet-Draft (stox WG)
Last updated 2014-01-23
Replaces draft-saintandre-sip-xmpp-chat
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Network Working Group                                     P. Saint-Andre
Internet-Draft
Intended status: Standards Track                               S. Loreto
Expires: July 27, 2014                                          Ericsson
                                                        January 23, 2014

   Interworking between the Session Initiation Protocol (SIP) and the
Extensible Messaging and Presence Protocol (XMPP): One-to-One Text Chat
                                Sessions
                        draft-ietf-stox-chat-05

Abstract

   This document defines a bidirectional protocol mapping for the
   exchange of instant messages in the context of a one-to-one chat
   session between a user of the Session Initiation Protocol (SIP) and a
   user of the Extensible Messaging and Presence Protocol (XMPP).
   Specifically for SIP text chat, this document specifies a mapping to
   the Message Session Relay Protocol (MSRP).

Status of This Memo

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   This Internet-Draft will expire on July 27, 2014.

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   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
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   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  XMPP to MSRP  . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  MSRP to XMPP  . . . . . . . . . . . . . . . . . . . . . . . .   7
   5.  Composing Events  . . . . . . . . . . . . . . . . . . . . . .  11
   6.  Delivery Reports  . . . . . . . . . . . . . . . . . . . . . .  13
   7.  Internationalization Considerations . . . . . . . . . . . . .  14
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   Both the Session Initiation Protocol (SIP) [RFC3261] and the
   Extensible Messaging and Presence Protocol (XMPP) [RFC6120] can be
   used for the purpose of one-to-one text chat over the Internet.  To
   ensure interworking between these technologies, it is important to
   define bidirectional protocol mappings.

   The architectural assumptions underlying such protocol mappings are
   provided in [I-D.ietf-stox-core], including mapping of addresses and
   error conditions.  This document specifies mappings for one-to-one
   text chat sessions (sometimes called "session-mode" messaging); in
   particular, this document specifies mappings between XMPP messages of
   type "chat" and the Message Session Relay Protocol (MSRP) [RFC4975],
   which is commonly used in SIP-based systems for chat functionality
   (although note that MSRP is not conjoined to SIP, and can be used by
   non-SIP technologies).  Mappings for single instant messages and
   groupchat are provided in separate documents.

   The approach taken here is to directly map syntax and semantics from
   one protocol to another.  The mapping described herein depends on the
   protocols defined in the following specifications:

   o  XMPP chat sessions using message stanzas of type "chat" are
      specified in [RFC6121].

   o  MSRP chat sessions using the SIP INVITE and SEND request types are
      specified in [RFC4975].

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   In SIP-based systems that use MSRP, a chat session is formally
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