The WebSocket Protocol as a Transport for the Session Initiation Protocol (SIP)
draft-ietf-sipcore-sip-websocket-09

SIPCORE Working Group                                    I. Baz Castillo
Internet-Draft                                        J. Millan Villegas
Updates: 3261 (if approved)                                    Versatica
Intended status: Standards Track                              V. Pascual
Expires: December 15, 2013                                   Acme Packet
                                                           June 13, 2013

    The WebSocket Protocol as a Transport for the Session Initiation
                             Protocol (SIP)
                  draft-ietf-sipcore-sip-websocket-09

Abstract

   The WebSocket protocol enables two-way realtime communication between
   clients and servers in web-based applications.  This document
   specifies a WebSocket sub-protocol as a reliable transport mechanism
   between SIP (Session Initiation Protocol) entities to enable usage of
   SIP in web-oriented deployments.  This document normatively updates
   RFC 3261.

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 December 15, 2013.

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   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.1.  Definitions  . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  The WebSocket Protocol . . . . . . . . . . . . . . . . . . . .  5
   4.  The WebSocket SIP Sub-Protocol . . . . . . . . . . . . . . . .  5
     4.1.  Handshake  . . . . . . . . . . . . . . . . . . . . . . . .  6
     4.2.  SIP Encoding . . . . . . . . . . . . . . . . . . . . . . .  6
   5.  SIP WebSocket Transport  . . . . . . . . . . . . . . . . . . .  7
     5.1.  General  . . . . . . . . . . . . . . . . . . . . . . . . .  7
     5.2.  Updates to RFC 3261  . . . . . . . . . . . . . . . . . . .  7
       5.2.1.  Via Transport Parameter  . . . . . . . . . . . . . . .  7
       5.2.2.  SIP URI Transport Parameter  . . . . . . . . . . . . .  7
       5.2.3.  Via received Parameter . . . . . . . . . . . . . . . .  8
       5.2.4.  SIP Transport Implementation Requirements  . . . . . .  8
     5.3.  Locating a SIP Server  . . . . . . . . . . . . . . . . . .  9
   6.  Connection Keep-Alive  . . . . . . . . . . . . . . . . . . . .  9
   7.  Authentication . . . . . . . . . . . . . . . . . . . . . . . . 10
   8.  Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     8.1.  Registration . . . . . . . . . . . . . . . . . . . . . . . 11
     8.2.  INVITE Dialog through a Proxy  . . . . . . . . . . . . . . 12
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 16
     9.1.  Secure WebSocket Connection  . . . . . . . . . . . . . . . 16
     9.2.  Usage of SIPS Scheme . . . . . . . . . . . . . . . . . . . 17
   10. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 17
     10.1. Registration of the WebSocket SIP Sub-Protocol . . . . . . 17
     10.2. Registration of new NAPTR Service Field Values . . . . . . 17
     10.3. SIP/SIPS URI Parameters Sub-Registry . . . . . . . . . . . 18
     10.4. Header Fields Sub-Registry . . . . . . . . . . . . . . . . 18
     10.5. Header Field Parameters and Parameter Values