Network Working Group M. Petit-Huguenin
Internet-Draft (Unaffiliated)
Intended status: Informational November 25, 2009
Expires: May 29, 2010
Traversal Using Relays around NAT (TURN) Uniform Resource Identifiers
draft-petithuguenin-behave-turn-uri-bis-00
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Abstract
This document defines two URI schemes that can be used to provision
the configuration values needed by the resolution mechanism defined
in [I-D.ietf-behave-turn-uri].
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Syntax of a TURN or TURNS URI . . . . . . . . . . . . . . . . . 3
3. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
4.1. TURN URI Registration . . . . . . . . . . . . . . . . . . . 4
4.2. TURNS URI Registration . . . . . . . . . . . . . . . . . . 5
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6.1. Normative References . . . . . . . . . . . . . . . . . . . 6
6.2. Informative References . . . . . . . . . . . . . . . . . . 6
Appendix A. Release notes . . . . . . . . . . . . . . . . . . . . 6
A.1. Design Notes . . . . . . . . . . . . . . . . . . . . . . . 6
A.2. Running Code Considerations . . . . . . . . . . . . . . . . 6
A.3. TODO List . . . . . . . . . . . . . . . . . . . . . . . . . 6
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 7
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1. Introduction
[I-D.ietf-behave-turn-uri] defines a resolution mechanism to convert
a secure flag, an host name or IP address, a eventually empty port,
and an eventually empty transport to a list of IP address, port and
TURN transport tuples.
To simplify the provisioning of TURN clients, this document defines a
TURN and a TURNS URI scheme that can carry the four components needed
for the resolution mechanism.
2. Syntax of a TURN or TURNS URI
A TURN/TURNS URI has the following ABNF syntax [RFC5234]:
turnURI = scheme ":" turn-host [ ":" turn-port ]
[ "?transport=" transport ]
scheme = "turn" / "turns"
transport = "udp" / "tcp" / transport-ext
transport-ext = 1*unreserved
turn-host = IP-literal / IPv4address / reg-name
turn-port = *DIGIT
IP-literal = "[" ( IPv6address / IPvFuture ) "]"
IPvFuture = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )
IPv6address = 6( h16 ":" ) ls32
/ "::" 5( h16 ":" ) ls32
/ [ h16 ] "::" 4( h16 ":" ) ls32
/ [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
/ [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
/ [ *3( h16 ":" ) h16 ] "::" h16 ":" ls32
/ [ *4( h16 ":" ) h16 ] "::" ls32
/ [ *5( h16 ":" ) h16 ] "::" h16
/ [ *6( h16 ":" ) h16 ] "::"
h16 = 1*4HEXDIG
ls32 = ( h16 ":" h16 ) / IPv4address
IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet
dec-octet = DIGIT ; 0-9
/ %x31-39 DIGIT ; 10-99
/ "1" 2DIGIT ; 100-199
/ "2" %x30-34 DIGIT ; 200-249
/ "25" %x30-35 ; 250-255
reg-name = *( unreserved / pct-encoded / sub-delims )
<unreserved>, <sub-delims> and <pct-encoded> are specified in
[RFC3986].
<secure> is equal to false is <scheme> is equal to "turn" and equal
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to false if <scheme> is equal to "turns".
3. Security Considerations
Security considerations for the resolution mechanism are discussed in
[I-D.ietf-behave-turn-uri].
The "turn" and "turns" URI schemes do not introduce any specific
security issues beyond the security considerations discussed in
[RFC3986].
4. IANA Considerations
This section contains the registration information for the "turn" and
"turns" URI Schemes (in accordance with [RFC4395]).
4.1. TURN URI Registration
URI scheme name: turn
Status: permanent
URI scheme syntax: See Section 2.
URI scheme semantics: See [I-D.ietf-behave-turn-uri].
Encoding considerations: There are no encoding considerations beyond
those in [RFC3986].
Applications/protocols that use this URI scheme name:
The "turn" URI scheme is intended to be used by applications that
might need access to a TURN server.
Interoperability considerations: N/A
Security considerations: See Section 3.
Contact: Marc Petit-Huguenin <petithug@acm.org>
Author/Change controller: Marc Petit-Huguenin <petithug@acm.org>
References: This document.
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4.2. TURNS URI Registration
URI scheme name: turns
Status: permanent
URI scheme syntax: See Section 2.
URI scheme semantics: See [I-D.ietf-behave-turn-uri].
Encoding considerations: There are no encoding considerations beyond
those in [RFC3986].
Applications/protocols that use this URI scheme name:
The "turns" URI scheme is intended to be used by applications that
might need access to a TURN server.
Interoperability considerations: N/A
Security considerations: See Section 3.
Contact: Marc Petit-Huguenin <petithug@acm.org>
Author/Change controller: Marc Petit-Huguenin <petithug@acm.org>
References: This document.
5. Acknowledgements
Thanks to Margaret Wasserman, Magnus Westerlund, Juergen
Schoenwaelder, Sean Turner, Ted Hardie, Dave Thaler, Alfred E.
Heggestad, Eilon Yardeni, Dan Wing, Alfred Hoenes and Jim Kleck for
their comments, suggestions and questions that helped to improve this
document.
The <turn-port> and <turn-host> ABNF productions have been copied
from the <port> and <host> ABNF productions from [RFC3986].
This document was written with the xml2rfc tool described in
[RFC2629].
6. References
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6.1. Normative References
[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
Resource Identifier (URI): Generic Syntax", STD 66,
RFC 3986, January 2005.
[RFC5234] Crocker, D. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", STD 68, RFC 5234, January 2008.
[I-D.ietf-behave-turn-uri]
Petit-Huguenin, M., "Traversal Using Relays around NAT
(TURN) Resolution Mechanism",
draft-ietf-behave-turn-uri-05 (work in progress),
November 2009.
6.2. Informative References
[RFC2629] Rose, M., "Writing I-Ds and RFCs using XML", RFC 2629,
June 1999.
[RFC4395] Hansen, T., Hardie, T., and L. Masinter, "Guidelines and
Registration Procedures for New URI Schemes", BCP 35,
RFC 4395, February 2006.
Appendix A. Release notes
This section must be removed before publication as an RFC.
A.1. Design Notes
o <password> is not used in the URIs because it is deprecated.
<username> is not used in the URIs because it is not used to guide
the resolution mechanism.
o As discussed in Dublin, there is no generic parameters in the URI
to prevent compatibity issues.
A.2. Running Code Considerations
o Reference Implementation of TURN URI parser and resolver
(<http://ietf.implementers.org/turn-uri-0.3.zip>). Marc Petit-
Huguenin. Implements version -00
A.3. TODO List
(Empty)
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Author's Address
Marc Petit-Huguenin
(Unaffiliated)
Email: petithug@acm.org
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