The Binary Floor Control Protocol (BFCP)
RFC 8855

Document Type RFC - Proposed Standard (January 2021; No errata)
Obsoletes RFC 4582
Authors Gonzalo Camarillo  , Keith Drage  , Tom Kristensen  , Joerg Ott  , Charles Eckel 
Last updated 2021-01-19
Replaces draft-sandbakken-dispatch-bfcp-udp
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Stream WG state Submitted to IESG for Publication
Document shepherd Mary Barnes
Shepherd write-up Show (last changed 2014-12-23)
IESG IESG state RFC 8855 (Proposed Standard)
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Responsible AD Alissa Cooper
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IANA IANA review state Version Changed - Review Needed
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Internet Engineering Task Force (IETF)                      G. Camarillo
Request for Comments: 8855                                      Ericsson
Obsoletes: 4582                                                 K. Drage
Category: Standards Track                                               
ISSN: 2070-1721                                            T. Kristensen
                                                                  Jotron
                                                                  J. Ott
                                             Technical University Munich
                                                                C. Eckel
                                                                   Cisco
                                                            January 2021

                The Binary Floor Control Protocol (BFCP)

Abstract

   Floor control is a means to manage joint or exclusive access to
   shared resources in a (multiparty) conferencing environment.
   Thereby, floor control complements other functions -- such as
   conference and media session setup, conference policy manipulation,
   and media control -- that are realized by other protocols.

   This document specifies the Binary Floor Control Protocol (BFCP).
   BFCP is used between floor participants and floor control servers,
   and between floor chairs (i.e., moderators) and floor control
   servers.

   This document obsoletes RFC 4582.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8855.

Copyright Notice

   Copyright (c) 2021 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
   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.  Terminology
   3.  Scope
     3.1.  Floor Creation
     3.2.  Obtaining Information to Contact a Floor Control Server
     3.3.  Obtaining Floor-Resource Associations
     3.4.  Privileges of Floor Control
   4.  Overview of Operation
     4.1.  Floor Participant to Floor Control Server Interface
     4.2.  Floor Chair to Floor Control Server Interface
   5.  Packet Format
     5.1.  COMMON-HEADER Format
     5.2.  Attribute Format
       5.2.1.  BENEFICIARY-ID
       5.2.2.  FLOOR-ID
       5.2.3.  FLOOR-REQUEST-ID
       5.2.4.  PRIORITY
       5.2.5.  REQUEST-STATUS
       5.2.6.  ERROR-CODE
         5.2.6.1.  Error Specific Details for Error Code 4
       5.2.7.  ERROR-INFO
       5.2.8.  PARTICIPANT-PROVIDED-INFO
       5.2.9.  STATUS-INFO
       5.2.10. SUPPORTED-ATTRIBUTES
       5.2.11. SUPPORTED-PRIMITIVES
       5.2.12. USER-DISPLAY-NAME
       5.2.13. USER-URI
       5.2.14. BENEFICIARY-INFORMATION
       5.2.15. FLOOR-REQUEST-INFORMATION
       5.2.16. REQUESTED-BY-INFORMATION
       5.2.17. FLOOR-REQUEST-STATUS
       5.2.18. OVERALL-REQUEST-STATUS
     5.3.  Message Format
       5.3.1.  FloorRequest
       5.3.2.  FloorRelease
       5.3.3.  FloorRequestQuery
       5.3.4.  FloorRequestStatus
       5.3.5.  UserQuery
       5.3.6.  UserStatus
       5.3.7.  FloorQuery
       5.3.8.  FloorStatus
       5.3.9.  ChairAction
       5.3.10. ChairActionAck
       5.3.11. Hello
       5.3.12. HelloAck
       5.3.13. Error
       5.3.14. FloorRequestStatusAck
       5.3.15. FloorStatusAck
       5.3.16. Goodbye
       5.3.17. GoodbyeAck
   6.  Transport
     6.1.  Reliable Transport
     6.2.  Unreliable Transport
       6.2.1.  Congestion Control
       6.2.2.  ICMP Error Handling
       6.2.3.  Fragmentation Handling
       6.2.4.  NAT Traversal
   7.  Lower-Layer Security
   8.  Protocol Transactions
     8.1.  Client Behavior
     8.2.  Server Behavior
     8.3.  Timers
       8.3.1.  Request Retransmission Timer, T1
       8.3.2.  Response Retransmission Timer, T2
       8.3.3.  Timer Values
   9.  Authentication and Authorization
     9.1.  TLS/DTLS Based Mutual Authentication
   10. Floor Participant Operations
     10.1.  Requesting a Floor
       10.1.1.  Sending a FloorRequest Message
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