Session Description Protocol (SDP) Offer/Answer procedures for Interactive Connectivity Establishment (ICE)
draft-ietf-mmusic-ice-sip-sdp-14

Document Type Active Internet-Draft (mmusic WG)
Last updated 2017-10-02
Replaces draft-petithuguenin-mmusic-ice-sip-sdp
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Stream WG state WG Document (wg milestone: Sep 2017 - Submit Interactive C... )
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MMUSIC                                                 M. Petit-Huguenin
Internet-Draft                                        Impedance Mismatch
Obsoletes: 5245 (if approved)                                 A. Keranen
Intended status: Standards Track                                Ericsson
Expires: April 5, 2018                                     S. Nandakumar
                                                           Cisco Systems
                                                         October 2, 2017

     Session Description Protocol (SDP) Offer/Answer procedures for
              Interactive Connectivity Establishment (ICE)
                    draft-ietf-mmusic-ice-sip-sdp-14

Abstract

   This document describes Session Description Protocol (SDP) Offer/
   Answer procedures for carrying out Interactive Connectivity
   Establishment (ICE) between the agents.

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   This Internet-Draft will expire on April 5, 2018.

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   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
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Petit-Huguenin, et al.    Expires April 5, 2018                 [Page 1]
Internet-Draft                ICE SDP Usage                 October 2017

   the Trust Legal Provisions and are provided without warranty as
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  ICE Candidate Exchange and Offer/Answer Mapping . . . . . . .   4
   4.  SDP Offer/Answer Procedures . . . . . . . . . . . . . . . . .   4
     4.1.  Initial Offer/Answer Exchange . . . . . . . . . . . . . .   4
       4.1.1.  Sending the Initial Offer . . . . . . . . . . . . . .   4
       4.1.2.  Receiving the Initial Offer . . . . . . . . . . . . .   7
       4.1.3.  Receipt of the Initial Answer . . . . . . . . . . . .   8
       4.1.4.  Performing Connectivity Checks  . . . . . . . . . . .   9
       4.1.5.  Concluding ICE  . . . . . . . . . . . . . . . . . . .   9
     4.2.  Subsequent Offer/Answer Exchanges . . . . . . . . . . . .  10
       4.2.1.  Generating the Offer  . . . . . . . . . . . . . . . .  10
       4.2.2.  Receiving the Offer and Generating an Answer  . . . .  13
       4.2.3.  Receiving the Answer for a Subsequent Offer . . . . .  16
       4.2.4.  Updating the Check and Valid Lists  . . . . . . . . .  17
   5.  Grammar . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
     5.1.  "candidate" Attribute . . . . . . . . . . . . . . . . . .  18
     5.2.  "remote-candidates" Attribute . . . . . . . . . . . . . .  21
     5.3.  "ice-lite" and "ice-mismatch" Attributes  . . . . . . . .  21
     5.4.  "ice-ufrag" and "ice-pwd" Attributes  . . . . . . . . . .  22
     5.5.  "ice-pacing" Attribute  . . . . . . . . . . . . . . . . .  22
     5.6.  "ice-options" Attribute . . . . . . . . . . . . . . . . .  23
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