Stream Control Transmission Protocol (SCTP)-Based Media Transport in the Session Description Protocol (SDP)
draft-ietf-mmusic-sctp-sdp-02

The information below is for an old version of the document
Document Type Active Internet-Draft (mmusic WG)
Last updated 2012-10-22
Replaces draft-loreto-mmusic-sctp-sdp
Stream IETF
Intended RFC status (None)
Formats pdf htmlized bibtex
Reviews
Stream WG state WG Document
Document shepherd Flemming Andreasen
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)
MMUSIC                                                         S. Loreto
Internet-Draft                                              G. Camarillo
Intended status: Standards Track                                Ericsson
Expires: April 25, 2013                                 October 22, 2012

Stream Control Transmission Protocol (SCTP)-Based Media Transport in the
                   Session Description Protocol (SDP)
                     draft-ietf-mmusic-sctp-sdp-02

Abstract

   SCTP (Stream Control Transmission Protocol) is a transport protocol
   used to establish associations between two endpoints.  This document
   describes how to express media transport over SCTP in SDP (Session
   Description Protocol).  This document defines the 'SCTP', 'SCTP/DTLS'
   and 'DTLS/SCTP' protocol identifiers for SDP.

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 http://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 April 25, 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
   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

Loreto & Camarillo       Expires April 25, 2013                 [Page 1]
Internet-Draft    The SCTP protocol identifier for SDP      October 2012

   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Protocol Identifier  . . . . . . . . . . . . . . . . . . . . .  4
   4.  Media Formats  . . . . . . . . . . . . . . . . . . . . . . . .  4
     4.1.  data channels and m-line . . . . . . . . . . . . . . . . .  5
   5.  Streams Attribute  . . . . . . . . . . . . . . . . . . . . . .  6
   6.  Datachannel Attribute  . . . . . . . . . . . . . . . . . . . .  6
   7.  The Setup and Connection Attributes and Association
       Management . . . . . . . . . . . . . . . . . . . . . . . . . .  7
   8.  Multihoming  . . . . . . . . . . . . . . . . . . . . . . . . .  7
   9.  Network Address Translation (NAT) Considerations . . . . . . .  8
   10. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     10.1. Actpass/Passive  . . . . . . . . . . . . . . . . . . . . .  8
     10.2. Existing Connection Reuse  . . . . . . . . . . . . . . . .  9
     10.3. SDP description for DTLS Connection  . . . . . . . . . . . 10
   11. Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   12. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
   13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     13.1. Normative References . . . . . . . . . . . . . . . . . . . 11
     13.2. Informative References . . . . . . . . . . . . . . . . . . 12
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12

Loreto & Camarillo       Expires April 25, 2013                 [Page 2]
Internet-Draft    The SCTP protocol identifier for SDP      October 2012

1.  Introduction

   SDP (Session Description Protocol) [RFC4566] provides a general-
   purpose format for describing multimedia sessions in announcements or
   invitations.  RFC4145 [RFC4145] specifies a general mechanism for
   describing and establishing TCP (Transmission Control Protocol)
   streams.  RFC 4572 [RFC4572] extends RFC4145 [RFC4145] for describing
   TCP-based media streams that are protected using TLS (Transport Layer
   Security) [RFC5246].

   This document defines a new protocol identifier, 'SCTP', to describe
   SCTP-based [RFC4960] media streams.  Additionally, this document
   specifies the use of the 'setup' and 'connection' SDP attributes to
   establish SCTP associations.  These attributes were defined in
   RFC4145 [RFC4145] for TCP.  This document discusses their use with
   SCTP.

   Additionally this document defines two new protocol identifiers:

   SCTP/DTLS :  to allow the usage of the Datagram Transport Layer
Show full document text