Session Description Protocol (SDP) Format for Binary Floor Control Protocol (BFCP) Streams
draft-ietf-bfcpbis-rfc4583bis-04

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Last updated 2012-12-19
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BFCPbis Working Group                                       G. Camarillo
Internet-Draft                                                  Ericsson
Obsoletes: 4583 (if approved)                              T. Kristensen
Intended status: Standards Track                                   Cisco
Expires: June 22, 2013                                 December 19, 2012

   Session Description Protocol (SDP) Format for Binary Floor Control
                        Protocol (BFCP) Streams
                    draft-ietf-bfcpbis-rfc4583bis-04

Abstract

   This document specifies how to describe Binary Floor Control Protocol
   (BFCP) streams in Session Description Protocol (SDP) descriptions.
   User agents using the offer/answer model to establish BFCP streams
   use this format in their offers and answers.

   This document obsoletes RFC 4583.  Changes from RFC 4583 are
   summarized in Section 12.

Status of this Memo

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

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   This Internet-Draft will expire on June 22, 2013.

Copyright Notice

   Copyright (c) 2012 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
   carefully, as they describe your rights and restrictions with respect

Camarillo & Kristensen    Expires June 22, 2013                 [Page 1]
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   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 . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Fields in the 'm' Line . . . . . . . . . . . . . . . . . . . .  3
   4.  Floor Control Server Determination . . . . . . . . . . . . . .  4
   5.  The 'confid' and 'userid' SDP Attributes . . . . . . . . . . .  6
   6.  Association between Streams and Floors . . . . . . . . . . . .  6
   7.  BFCP Connection Management . . . . . . . . . . . . . . . . . .  7
     7.1.  TCP Connection Management  . . . . . . . . . . . . . . . .  7
   8.  Authentication . . . . . . . . . . . . . . . . . . . . . . . .  8
   9.  Examples . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
   10. Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   11. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
     11.1. Registration of SDP 'proto' Values . . . . . . . . . . . . 11
     11.2. Registration of the SDP 'floorctrl' Attribute  . . . . . . 11
     11.3. Registration of the SDP 'confid' Attribute . . . . . . . . 12
     11.4. Registration of the SDP 'userid' Attribute . . . . . . . . 12
     11.5. Registration of the SDP 'floorid' Attribute  . . . . . . . 12
   12. Changes from RFC 4583  . . . . . . . . . . . . . . . . . . . . 13
   13. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14
   14. Normative References . . . . . . . . . . . . . . . . . . . . . 14
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15

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1.  Introduction

   As discussed in the BFCP (Binary Floor Control Protocol)
   specification [8], a given BFCP client needs a set of data in order
   to establish a BFCP connection to a floor control server.  These data
   include the transport address of the server, the conference
   identifier, and the user identifier.

   One way for clients to obtain this information is to use an offer/
   answer [4] exchange.  This document specifies how to encode this
   information in the SDP session descriptions that are part of such an
   offer/answer exchange.

   User agents typically use the offer/answer model to establish a
   number of media streams of different types.  Following this model, a
   BFCP connection is described as any other media stream by using an
   SDP 'm' line, possibly followed by a number of attributes encoded in
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