An XMPP Sub-protocol for WebSocket
draft-ietf-xmpp-websocket-00

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Document Type Active Internet-Draft (xmpp WG)
Last updated 2013-09-05
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: March 09, 2014                                          Mozilla
                                                              E. Cestari
                                                        cstar industries
                                                      September 05, 2013

                   An XMPP Sub-protocol for WebSocket
                      draft-ietf-xmpp-websocket-00

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

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on March 09, 2014.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Stout, et al.            Expires March 09, 2014                 [Page 1]
Internet-Draft            XMPP over WebSocket             September 2013

   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.

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
     3.6.  Stanzas . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.7.  Stream Restarts . . . . . . . . . . . . . . . . . . . . .   6
     3.8.  Pings and Keepalives  . . . . . . . . . . . . . . . . . .   6
     3.9.  Use of TLS  . . . . . . . . . . . . . . . . . . . . . . .   7
     3.10. Stream Management . . . . . . . . . . . . . . . . . . . .   7
   4.  Discovering Connection Method . . . . . . . . . . . . . . . .   7
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   7.  Informative References  . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   Applications using 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.

Stout, et al.            Expires March 09, 2014                 [Page 2]
Internet-Draft            XMPP over WebSocket             September 2013

   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] now exists to
   solve these kinds of problems.  The WebSocket protocol is a bi-
   directional protocol that provides a simple message-based framing
   layer over raw sockets and allows for more robust and efficient
   communication in web applications.

   The WebSocket protocol enables two-way communication between a client
   and a server, effectively emulating TCP at the application layer and
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