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Versions: 00 01 02 03 04 05                                             
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

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on May 29, 2010.

Copyright Notice

   Copyright (c) 2009 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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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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