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A Network Address Translator (NAT) Traversal Mechanism for Media Controlled by Real-Time Streaming Protocol (RTSP)
draft-ietf-mmusic-rtsp-nat-22

Document type: Active Internet-Draft (mmusic WG)
Document stream: IETF
Last updated: 2014-08-20 (latest revision 2014-07-10)
Intended RFC status: Proposed Standard
Other versions: plain text, xml, pdf, html

IETF State: Submitted to IESG for Publication Oct 2013
Consensus: Yes
Document shepherd: Flemming Andreasen
Shepherd Write-Up: Last changed 2014-07-09

IESG State: RFC Ed Queue
IANA Review State: IANA OK - Actions Needed
IANA Action State: RFC-Ed-Ack
RFC Editor State: MISSREF
Responsible AD: Alissa Cooper
Send notices to: mmusic-chairs@tools.ietf.org, draft-ietf-mmusic-rtsp-nat@tools.ietf.org

Network Working Group                                        J. Goldberg
Internet-Draft                                                     Cisco
Intended status: Standards Track                           M. Westerlund
Expires: January 11, 2015                                       Ericsson
                                                                 T. Zeng
                                                 Nextwave Wireless, Inc.
                                                           July 10, 2014

    A Network Address Translator (NAT) Traversal Mechanism for Media
           Controlled by Real-Time Streaming Protocol (RTSP)
                     draft-ietf-mmusic-rtsp-nat-22

Abstract

   This document defines a solution for Network Address Translation
   (NAT) traversal for datagram based media streams set up and
   controlled with Real-time Streaming Protocol version 2 (RTSP 2.0).
   It uses Interactive Connectivity Establishment (ICE) adapted to use
   RTSP as a signaling channel, defining the necessary RTSP extensions
   and procedures.

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 January 11, 2015.

Copyright Notice

   Copyright (c) 2014 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

Goldberg, et al.        Expires January 11, 2015                [Page 1]
Internet-Draft  A Media NAT Traversal Mechanism for RTSP       July 2014

   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
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Solution Overview . . . . . . . . . . . . . . . . . . . . . .   4
   4.  RTSP Extensions . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  ICE Transport Lower Layer . . . . . . . . . . . . . . . .   6
     4.2.  ICE Candidate Transport Header Parameter  . . . . . . . .   7
     4.3.  ICE Password and Username Transport Header Parameters . .  10
     4.4.  ICE Feature Tag . . . . . . . . . . . . . . . . . . . . .  11
     4.5.  Status Codes  . . . . . . . . . . . . . . . . . . . . . .  11
       4.5.1.  150 ICE Connectivity Checks in Progress . . . . . . .  12
       4.5.2.  480 ICE Processing Failed . . . . . . . . . . . . . .  12
     4.6.  New Reason for PLAY_NOTIFY  . . . . . . . . . . . . . . .  12
     4.7.  Server Side SDP Attribute for ICE Support . . . . . . . .  12
   5.  ICE-RTSP  . . . . . . . . . . . . . . . . . . . . . . . . . .  13
     5.1.  ICE Features Not Required . . . . . . . . . . . . . . . .  13
       5.1.1.  ICE-Lite  . . . . . . . . . . . . . . . . . . . . . .  13
       5.1.2.  ICE-Mismatch  . . . . . . . . . . . . . . . . . . . .  13
       5.1.3.  ICE Remote Candidate Transport Header Parameter . . .  13
     5.2.  High-Reachability Configuration . . . . . . . . . . . . .  14
   6.  Detailed Solution . . . . . . . . . . . . . . . . . . . . . .  14
     6.1.  Session description and RTSP DESCRIBE (optional)  . . . .  14
     6.2.  Setting up the Media Streams  . . . . . . . . . . . . . .  15
     6.3.  RTSP SETUP Request  . . . . . . . . . . . . . . . . . . .  15
     6.4.  Gathering Candidates  . . . . . . . . . . . . . . . . . .  16
     6.5.  RTSP Server Response  . . . . . . . . . . . . . . . . . .  17
     6.6.  Server to Client ICE Connectivity Checks  . . . . . . . .  17
     6.7.  Client to Server ICE Connectivity Check . . . . . . . . .  18
     6.8.  Client Connectivity Checks Complete . . . . . . . . . . .  19
     6.9.  Server Connectivity Checks Complete . . . . . . . . . . .  19
     6.10. Freeing Candidates  . . . . . . . . . . . . . . . . . . .  20

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