A Network Address Translator (NAT) Traversal mechanism for media controlled by Real-Time Streaming Protocol (RTSP)
draft-ietf-mmusic-rtsp-nat-17

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Document Type Active Internet-Draft (mmusic WG)
Last updated 2013-11-18
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Network Working Group                                        J. Goldberg
Internet-Draft                                                     Cisco
Intended status: Standards Track                           M. Westerlund
Expires: May 22, 2014                                           Ericsson
                                                                 T. Zeng
                                                 Nextwave Wireless, Inc.
                                                       November 18, 2013

    A Network Address Translator (NAT) Traversal mechanism for media
           controlled by Real-Time Streaming Protocol (RTSP)
                     draft-ietf-mmusic-rtsp-nat-17

Abstract

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

Status of This Memo

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   This Internet-Draft will expire on May 22, 2014.

Copyright Notice

   Copyright (c) 2013 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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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Goldberg, et al.          Expires May 22, 2014                  [Page 1]
Internet-Draft  A Media NAT Traversal mechanism for RTSP   November 2013

   carefully, as they describe your rights and restrictions with respect
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   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 . . . . . . .  11
       4.5.2.  480 ICE Processing Failed . . . . . . . . . . . . . .  11
     4.6.  New Reason for PLAY_NOTIFY  . . . . . . . . . . . . . . .  12
     4.7.  Server Side SDP Attribute for ICE Support . . . . . . . .  12
   5.  ICE-RTSP  . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     5.1.  ICE Features Not Required . . . . . . . . . . . . . . . .  12
       5.1.1.  ICE-Lite  . . . . . . . . . . . . . . . . . . . . . .  12
       5.1.2.  ICE-Mismatch  . . . . . . . . . . . . . . . . . . . .  13
       5.1.3.  ICE Remote Candidate Transport Header Parameter . . .  13
     5.2.  High-Reachability Configuration . . . . . . . . . . . . .  13
   6.  Detailed Solution . . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  Session description and RTSP DESCRIBE (optional)  . . . .  13
     6.2.  Setting up the Media Streams  . . . . . . . . . . . . . .  15
     6.3.  RTSP SETUP Request  . . . . . . . . . . . . . . . . . . .  15
     6.4.  Gathering Candidates  . . . . . . . . . . . . . . . . . .  15
     6.5.  RTSP Server Response  . . . . . . . . . . . . . . . . . .  16
     6.6.  Server to Client ICE Connectivity Checks  . . . . . . . .  17
     6.7.  Client to Server ICE Connectivity Check . . . . . . . . .  17
     6.8.  Client Connectivity Checks Complete . . . . . . . . . . .  18
     6.9.  Server Connectivity Checks Complete . . . . . . . . . . .  19
     6.10. Freeing Candidates  . . . . . . . . . . . . . . . . . . .  19
     6.11. Steady State  . . . . . . . . . . . . . . . . . . . . . .  19
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