Stream Control Transmission Protocol (SCTP)-Based Media Transport in the Session Description Protocol (SDP)
draft-ietf-mmusic-sctp-sdp-04

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Replaces draft-loreto-mmusic-sctp-sdp
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MMUSIC                                                         S. Loreto
Internet-Draft                                              G. Camarillo
Intended status: Standards Track                                Ericsson
Expires: January 1, 2014                                   June 30, 2013

Stream Control Transmission Protocol (SCTP)-Based Media Transport in the
                   Session Description Protocol (SDP)
                     draft-ietf-mmusic-sctp-sdp-04

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
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   This Internet-Draft will expire on January 1, 2014.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   the Trust Legal Provisions and are provided without warranty as

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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Protocol Identifier  . . . . . . . . . . . . . . . . . . . . .  4
   4.  Media Formats  . . . . . . . . . . . . . . . . . . . . . . . .  5
     4.1.  Media Descriptions . . . . . . . . . . . . . . . . . . . .  5
   5.  Media attributes . . . . . . . . . . . . . . . . . . . . . . .  6
     5.1.  sctpmap Attribute  . . . . . . . . . . . . . . . . . . . .  6
   6.  The Setup and Connection Attributes and Association
       Management . . . . . . . . . . . . . . . . . . . . . . . . . .  6
   7.  Multihoming  . . . . . . . . . . . . . . . . . . . . . . . . .  7
   8.  Network Address Translation (NAT) Considerations . . . . . . .  7
   9.  Examples . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     9.1.  Actpass/Passive  . . . . . . . . . . . . . . . . . . . . .  8
     9.2.  Existing Connection Reuse  . . . . . . . . . . . . . . . .  9
     9.3.  SDP description for SCTP over DTLS Connection  . . . . . .  9
   10. Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   11. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
   12. References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     12.1. Normative References . . . . . . . . . . . . . . . . . . . 10
     12.2. Informative References . . . . . . . . . . . . . . . . . . 11
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12

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1.  Introduction

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

   This document defines three new protocol identifiers:

   SCTP :  to describe SCTP-based [RFC4960] media streams.

   SCTP/DTLS :  to allow the usage of the Datagram Transport Layer
      Security (DTLS) [RFC4347] protocol over SCTP, as specified in
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