An XMPP Sub-protocol for WebSocket
draft-ietf-xmpp-websocket-02

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Document Type Active Internet-Draft (xmpp WG)
Last updated 2014-03-14
Replaces draft-moffitt-xmpp-over-websocket
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XMPP Working Group                                         L. Stout, Ed.
Internet-Draft                                                      &yet
Intended status: Standards Track                              J. Moffitt
Expires: September 15, 2014                                      Mozilla
                                                              E. Cestari
                                                        cstar industries
                                                          March 14, 2014

                   An XMPP Sub-protocol for WebSocket
                      draft-ietf-xmpp-websocket-02

Abstract

   This document defines a binding for the XMPP protocol over a
   WebSocket transport layer.  A WebSocket binding for XMPP provides
   higher performance than the current HTTP binding for XMPP.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on September 15, 2014.

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
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   include Simplified BSD License text as described in Section 4.e of

Stout, et al.          Expires September 15, 2014               [Page 1]
Internet-Draft             XMPP over WebSocket                March 2014

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  XMPP Sub-Protocol . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Handshake . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Messages  . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.3.  XMPP Stream Setup . . . . . . . . . . . . . . . . . . . .   4
     3.4.  Stream Errors . . . . . . . . . . . . . . . . . . . . . .   5
     3.5.  Closing the Connection  . . . . . . . . . . . . . . . . .   5
       3.5.1.  see-other-uri . . . . . . . . . . . . . . . . . . . .   6
     3.6.  Stanzas . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.7.  Stream Restarts . . . . . . . . . . . . . . . . . . . . .   7
     3.8.  Pings and Keepalives  . . . . . . . . . . . . . . . . . .   7
     3.9.  Use of TLS  . . . . . . . . . . . . . . . . . . . . . . .   8
     3.10. Stream Management . . . . . . . . . . . . . . . . . . . .   8
   4.  Discovering the WebSocket Connection Method . . . . . . . . .   8
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
     5.1.  WebSocket Subprotocol Name  . . . . . . . . . . . . . . .   9
     5.2.  URN Sub-Namespace . . . . . . . . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Appendix A.  XML Schema . . . . . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   Applications using the Extensible Messaging and Presence Protocol
   (XMPP) (see [RFC6120] and [RFC6121]) on the Web currently make use of
   BOSH (see [XEP-0124] and [XEP-0206]), an XMPP binding to HTTP.  BOSH
   is based on the HTTP long polling technique, and it suffers from high
   transport overhead compared to XMPP's native binding to TCP.  In
   addition, there are a number of other known issues with long polling
   [RFC6202], which have an impact on BOSH-based systems.

   It would be much better in most circumstances to avoid tunneling XMPP
   over HTTP long polled connections and instead use the XMPP protocol
   directly.  However, the APIs and sandbox that browsers have provided
   do not allow this.  The WebSocket protocol [RFC6455] exists to solve
   these kinds of problems.  The WebSocket protocol is a bidirectional
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