Trickle ICE: Incremental Provisioning of Candidates for the Interactive Connectivity Establishment (ICE) Protocol
draft-ietf-ice-trickle-07

Document Type Active Internet-Draft (ice WG)
Last updated 2017-02-27
Replaces draft-ietf-mmusic-trickle-ice
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Network Working Group                                            E. Ivov
Internet-Draft                                                 Atlassian
Intended status: Standards Track                             E. Rescorla
Expires: August 31, 2017                                      RTFM, Inc.
                                                               J. Uberti
                                                                  Google
                                                          P. Saint-Andre
                                                                Filament
                                                       February 27, 2017

Trickle ICE: Incremental Provisioning of Candidates for the Interactive
               Connectivity Establishment (ICE) Protocol
                       draft-ietf-ice-trickle-07

Abstract

   This document describes "Trickle ICE", an extension to the
   Interactive Connectivity Establishment (ICE) protocol that enables
   ICE agents to send and receive candidates incrementally rather than
   exchanging complete lists.  With such incremental provisioning, ICE
   agents can begin connectivity checks while they are still gathering
   candidates and considerably shorten the time necessary for ICE
   processing to complete.

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
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   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 August 31, 2017.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Ivov, et al.             Expires August 31, 2017                [Page 1]
Internet-Draft                 Trickle ICE                 February 2017

   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
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   include Simplified BSD License text as described in Section 4.e of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Determining Support for Trickle ICE . . . . . . . . . . . . .   5
   4.  Sending the Initial ICE Description . . . . . . . . . . . . .   6
   5.  Receiving the Initial ICE Description . . . . . . . . . . . .   7
     5.1.  Sending the Initial Response  . . . . . . . . . . . . . .   7
     5.2.  Forming Check Lists and Beginning Connectivity
           Checks  . . . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Receiving the Initial Answer  . . . . . . . . . . . . . . . .   8
   7.  Performing Connectivity Checks  . . . . . . . . . . . . . . .   8
     7.1.  Scheduling Checks . . . . . . . . . . . . . . . . . . . .   8
     7.2.  Check List and Timer State Updates  . . . . . . . . . . .   9
   8.  Discovering and Sending Additional Local Candidates . . . . .   9
     8.1.  Pairing Newly Learned Candidates and Updating
           Check Lists . . . . . . . . . . . . . . . . . . . . . . .  11
       8.1.1.  Inserting a New Pair in a Check List  . . . . . . . .  12
     8.2.  Announcing End of Candidates  . . . . . . . . . . . . . .  13
   9.  Receiving Additional Remote Candidates  . . . . . . . . . . .  14
   10. Receiving an End-Of-Candidates Notification . . . . . . . . .  15
   11. Trickle ICE and Peer Reflexive Candidates . . . . . . . . . .  15
   12. Concluding ICE Processing . . . . . . . . . . . . . . . . . .  15
   13. Subsequent Exchanges  . . . . . . . . . . . . . . . . . . . .  15
   14. Unilateral Use of Trickle ICE (Half Trickle)  . . . . . . . .  16
   15. Requirements for Signaling Protocols  . . . . . . . . . . . .  17
   16. Example Flow  . . . . . . . . . . . . . . . . . . . . . . . .  17
   17. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
   18. Security Considerations . . . . . . . . . . . . . . . . . . .  18
   19. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  18
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