A Network Address Translator (NAT) Traversal Mechanism for Media Controlled by the Real-Time Streaming Protocol (RTSP)
RFC 7825
Document | Type | RFC - Proposed Standard (December 2016; No errata) | |
---|---|---|---|
Authors | Jeff Goldberg , Magnus Westerlund , Thomas Zeng | ||
Last updated | 2016-12-27 | ||
Stream | Internet Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Flemming Andreasen | ||
Shepherd write-up | Show (last changed 2014-07-09) | ||
IESG | IESG state | RFC 7825 (Proposed Standard) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Alissa Cooper | ||
Send notices to | (None) | ||
IANA | IANA review state | IANA OK - Actions Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) J. Goldberg Request for Comments: 7825 Cisco Category: Standards Track M. Westerlund ISSN: 2070-1721 Ericsson T. Zeng Nextwave Wireless, Inc. December 2016 A Network Address Translator (NAT) Traversal Mechanism for Media Controlled by the Real-Time Streaming Protocol (RTSP) Abstract This document defines a solution for Network Address Translation (NAT) traversal for datagram-based media streams set up and controlled with the 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 is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7825. Goldberg, et al. Standards Track [Page 1] RFC 7825 A Media NAT Traversal Mechanism for RTSP December 2016 Copyright Notice Copyright (c) 2016 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 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. Key Words .......................................................4 3. Solution Overview ...............................................4 4. RTSP Extensions .................................................6 4.1. ICE Transport Lower Layer ..................................6 4.2. ICE Candidate Transport Header Parameter ...................8 4.3. ICE Password and Username Transport Header Parameters .....11 4.4. ICE Feature Tag ...........................................11 4.5. Status Codes ..............................................12 4.5.1. 150 Server still working on ICE connectivity checks ................................12 4.5.2. 480 ICE Connectivity check failure .................12 4.6. New Reason for PLAY_NOTIFY ................................12 4.7. Server-Side SDP Attribute for ICE Support .................13 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 ....14 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 ........................................16 6.4. Gathering Candidates ......................................16 6.5. RTSP Server Response ......................................17 6.6. Server-to-Client ICE Connectivity Checks ..................18 6.7. Client-to-Server ICE Connectivity Check ...................19 6.8. Client Connectivity Checks Complete .......................20 6.9. Server Connectivity Checks Complete .......................20 6.10. Freeing Candidates .......................................20 Goldberg, et al. Standards Track [Page 2] RFC 7825 A Media NAT Traversal Mechanism for RTSP December 2016 6.11. Steady State .............................................21 6.12. Re-SETUP .................................................21Show full document text