Using the SDP Offer/Answer Mechanism for DTLS
draft-ietf-mmusic-dtls-sdp-20

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Document Type Active Internet-Draft (mmusic WG)
Last updated 2017-03-01 (latest revision 2017-02-13)
Replaces draft-holmberg-mmusic-sdp-dtls
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Network Working Group                                        C. Holmberg
Internet-Draft                                                  Ericsson
Updates: 5763,7345 (if approved)                              R. Shpount
Intended status: Standards Track                             TurboBridge
Expires: August 17, 2017                               February 13, 2017

             Using the SDP Offer/Answer Mechanism for DTLS
                   draft-ietf-mmusic-dtls-sdp-20.txt

Abstract

   This document defines the SDP offer/answer procedures for negotiating
   and establishing a DTLS association.  The document also defines the
   criteria for when a new DTLS association must be established.  The
   document updates RFC 5763 and RFC 7345, by replacing common SDP
   offer/answer procedures with a reference to this specification.

   This document defines a new SDP media-level attribute, 'dtls-id'.

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
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   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 August 17, 2017.

Copyright Notice

   Copyright (c) 2017 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

Holmberg & Shpount       Expires August 17, 2017                [Page 1]
Internet-DraftUsing the SDP Offer/Answer Mechanism for DTLSFebruary 2017

   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
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Establishing a new DTLS Association . . . . . . . . . . . . .   3
     3.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Change of Local Transport Parameters  . . . . . . . . . .   4
     3.3.  Change of ICE ufrag value . . . . . . . . . . . . . . . .   4
   4.  SDP dtls-id Attribute . . . . . . . . . . . . . . . . . . . .   4
   5.  SDP Offer/Answer Procedures . . . . . . . . . . . . . . . . .   6
     5.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.2.  Generating the Initial SDP Offer  . . . . . . . . . . . .   8
     5.3.  Generating the Answer . . . . . . . . . . . . . . . . . .   8
     5.4.  Offerer Processing of the SDP Answer  . . . . . . . . . .   9
     5.5.  Modifying the Session . . . . . . . . . . . . . . . . . .   9
   6.  ICE Considerations  . . . . . . . . . . . . . . . . . . . . .  10
   7.  Transport Protocol Considerations . . . . . . . . . . . . . .  11
     7.1.  Transport Re-Usage  . . . . . . . . . . . . . . . . . . .  11
   8.  SIP Considerations  . . . . . . . . . . . . . . . . . . . . .  11
   9.  RFC Updates . . . . . . . . . . . . . . . . . . . . . . . . .  11
     9.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .  11
     9.2.  Update to RFC 5763  . . . . . . . . . . . . . . . . . . .  11
     9.3.  Update to RFC 7345  . . . . . . . . . . . . . . . . . . .  16
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  20
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
   12. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  20
   13. Change Log  . . . . . . . . . . . . . . . . . . . . . . . . .  20
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  24
     14.1.  Normative References . . . . . . . . . . . . . . . . . .  24
     14.2.  Informative References . . . . . . . . . . . . . . . . .  25
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  26

1.  Introduction

   [RFC5763] defines SDP offer/answer procedures for SRTP-DTLS.
   [RFC7345] defines SDP offer/answer procedures for UDPTL-DTLS.  This
   specification defines general offer/answer procedures for DTLS, based
   on the procedures in [RFC5763].  Other specifications, defining
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