MSRP over Data Channels
draft-ietf-mmusic-msrp-usage-data-channel-23

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Document Type Active Internet-Draft (mmusic WG)
Authors Jose Recio  , Christer Holmberg 
Last updated 2020-08-17 (latest revision 2020-07-22)
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: January 23, 2021                                  July 22, 2020

                        MSRP over Data Channels
              draft-ietf-mmusic-msrp-usage-data-channel-23

Abstract

   This document specifies how the Message Session Relay Protocol (MSRP)
   can be transported as a WebRTC data channel sub-protocol, using the
   SDP offer/answer generic data channel negotiation framework to
   establish such a channel.  Two network configurations are supported:
   connecting two MSRP over data channel endpoints; and a gateway
   configuration, connecting an MSRP over data channel endpoint with an
   MSRP over TCP or TLS endpoint.  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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
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   This Internet-Draft will expire on January 23, 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
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must

Recio & Holmberg        Expires January 23, 2021                [Page 1]
Internet-Draft           MSRP over Data Channels               July 2020

   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  WebRTC Data Channel Considerations  . . . . . . . . . . . . .   5
     3.1.  MSRP Data Channel . . . . . . . . . . . . . . . . . . . .   5
   4.  SDP Considerations  . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  MSRP URI  . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  msrp-scheme . . . . . . . . . . . . . . . . . . . . . . .   5
     4.3.  Use of the dcmap Attribute  . . . . . . . . . . . . . . .   6
     4.4.  Use of the dcsa Attribute . . . . . . . . . . . . . . . .   6
     4.5.  Use of the dcsa embedded setup Attribute  . . . . . . . .   7
     4.6.  Session Closing . . . . . . . . . . . . . . . . . . . . .   7
     4.7.  Support for MSRP File Transfer Function . . . . . . . . .   8
     4.8.  Example SDP Negotiation . . . . . . . . . . . . . . . . .   8
   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 . . . . . . . . . . . . . . .  11
     9.3.  SDP Attributes  . . . . . . . . . . . . . . . . . . . . .  12
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  18
   11. CHANGE LOG  . . . . . . . . . . . . . . . . . . . . . . . . .  18
     11.1.  Changes against 'draft-ietf-mmusic-msrp-usage-data-
            channel-22'  . . . . . . . . . . . . . . . . . . . . . .  18
     11.2.  Changes against 'draft-ietf-mmusic-msrp-usage-data-
            channel-21'  . . . . . . . . . . . . . . . . . . . . . .  18
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