MSRP over Data Channels
draft-ietf-mmusic-msrp-usage-data-channel-24

Document Type Active Internet-Draft (mmusic WG)
Authors Jose Recio  , Christer Holmberg 
Last updated 2020-10-08 (latest revision 2020-08-18)
Replaces draft-ejzak-mmusic-msrp-usage-data-channel
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MMUSIC                                                     J. Recio, Ed.
Internet-Draft                                              Unaffiliated
Updates: 4975 (if approved)                                  C. Holmberg
Intended status: Standards Track                                Ericsson
Expires: February 19, 2021                               August 18, 2020

                        MSRP over Data Channels
              draft-ietf-mmusic-msrp-usage-data-channel-24

Abstract

   This document specifies how a Web Real-Time Communication (WebRTC)
   data channel can be used as a transport mechanism for the Message
   Session Relay Protocol (MSRP) and how the Session Description
   Protocol (SDP) offer/answer mechanism can be used to negotiate such a
   data channel, referred to as an MSRP data channel.  Two network
   configurations are supported: connecting two MSRP data channel
   endpoints; and a gateway configuration, connecting an MSRP data
   channel endpoint with an MSRP over TCP or TLS endpoint.  This
   document updates RFC4975.  This document updates RFC4975.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on February 19, 2021.

Copyright Notice

   Copyright (c) 2020 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
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Recio & Holmberg        Expires February 19, 2021               [Page 1]
Internet-Draft           MSRP over Data Channels             August 2020

   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.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  WebRTC Data Channel Considerations  . . . . . . . . . . . . .   4
     3.1.  MSRP Data Channel . . . . . . . . . . . . . . . . . . . .   4
   4.  SDP Considerations  . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  MSRP URI  . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.2.  msrp-scheme . . . . . . . . . . . . . . . . . . . . . . .   4
     4.3.  Use of the dcmap Attribute  . . . . . . . . . . . . . . .   5
     4.4.  Use of the dcsa Attribute . . . . . . . . . . . . . . . .   5
     4.5.  Use of the dcsa embedded setup Attribute  . . . . . . . .   6
     4.6.  Session Closing . . . . . . . . . . . . . . . . . . . . .   7
     4.7.  Support for MSRP File Transfer Function . . . . . . . . .   7
     4.8.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   7
   5.  MSRP Considerations . . . . . . . . . . . . . . . . . . . . .   9
     5.1.  Session Mapping . . . . . . . . . . . . . . . . . . . . .   9
     5.2.  Session Opening . . . . . . . . . . . . . . . . . . . . .   9
     5.3.  Session Closing . . . . . . . . . . . . . . . . . . . . .   9
     5.4.  Data Framing  . . . . . . . . . . . . . . . . . . . . . .   9
     5.5.  Data Sending, Receiving and Reporting . . . . . . . . . .   9
     5.6.  Support for MSRP File Transfer Function . . . . . . . . .  10
   6.  Gateway Considerations  . . . . . . . . . . . . . . . . . . .  10
   7.  Updates to RFC4975  . . . . . . . . . . . . . . . . . . . . .  11
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
     9.1.  msrps URI scheme  . . . . . . . . . . . . . . . . . . . .  11
     9.2.  Subprotocol Identifier MSRP . . . . . . . . . . . . . . .  12
     9.3.  SDP Attributes  . . . . . . . . . . . . . . . . . . . . .  12
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  18
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  18
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  18
     11.2.  Informative References . . . . . . . . . . . . . . . . .  20
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