IETF                                                         D. McWalter
Internet-Draft                                       Data Connection Ltd
Expires: May 17, 2007                                  November 13, 2006


                 Uniform Resource Identifier (URI) MIB
                     draft-mcwalter-uri-mib-00.txt

Status of this Memo

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   This Internet-Draft will expire on May 17, 2007.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This MIB module defines textual conventions to represent STD 66
   [RFC3986] Uniform Resource Identifiers (URIs).  The intent is that
   these textual conventions will be imported and used in MIB modules
   that would otherwise define their own representation(s).








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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  The Internet-Standard Management Framework . . . . . . . . . .  3
   3.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4.  Security Considerations  . . . . . . . . . . . . . . . . . . .  5
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  6
   6.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  6
   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  6
     7.1   Normative References . . . . . . . . . . . . . . . . . . .  6
     7.2   Informative References . . . . . . . . . . . . . . . . . .  7
       Author's Address . . . . . . . . . . . . . . . . . . . . . . .  7
       Intellectual Property and Copyright Statements . . . . . . . .  8






































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1.  Introduction

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   It defines a textual convention to represent STD 66 [RFC3986] URIs.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

2.  The Internet-Standard Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   RFC 3410 [RFC3410].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (SNMP).
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in STD 58,
   RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
   [RFC2580].

3.  Definitions

URI-MIB DEFINITIONS ::= BEGIN

IMPORTS
    MODULE-IDENTITY, mib-2             FROM SNMPv2-SMI
    TEXTUAL-CONVENTION                 FROM SNMPv2-TC;

langTagMIB MODULE-IDENTITY
    LAST-UPDATED "200611130000Z" -- 13 November 2006
    ORGANIZATION "IETF Operations and Management Area"
    CONTACT-INFO "EMail: ops-area@ietf.org"
    DESCRIPTION
            "This MIB module defines a textual conventions for
            representing BCP 47 language tags."
    REVISION     "200611130000Z" -- 13 November 2006
    DESCRIPTION
           "Initial revision, published as RFC yyyy.

            Copyright (C) The IETF Trust (2006).  The initial version of
            this MIB module was published in RFC yyyy; for full legal
            notices see the RFC itself.  Supplementary information may
            be available at:



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            http://www.ietf.org/copyrights/ianamib.html."
-- RFC Ed.: replace yyyy with actual RFC number & remove this note
    ::= { mib-2 XXX }
-- RFC Ed.: replace XXX with IANA-assigned number & remove this note

Uri ::= TEXTUAL-CONVENTION
   DISPLAY-HINT "255a"
   STATUS      current
   DESCRIPTION
            "A Uniform Resource Identifier (URI) as defined by STD 66.

            This URI MUST be a normalized as defined in section 6 of
            RFC 3986 STD 66.  STD 66 defines that some parts of a URI
            are case-insensitive, but objects using this textual
            convention MUST use normalized URIs.  The purpose of this
            restriction is to help provide unique URIs for use as MIB
            table indexes.  Note that normalization of URIs does not
            by itself provide uniqueness: Two textually distinct
            normalized URIs may be equivalent."
   REFERENCE "RFC 3986 STD 66 and RFC 3305"
   SYNTAX      OCTET STRING

Uri255 ::= TEXTUAL-CONVENTION
   DISPLAY-HINT "255a"
   STATUS      current
   DESCRIPTION
            "A Uniform Resource Identifier (URI) as defined by STD 66.

            This URI MUST be a normalized as defined in section 6 of
            RFC 3986 STD 66.  STD 66 defines that some parts of a URI
            are case-insensitive, but objects using this textual
            convention MUST use normalized URIs.  The purpose of this
            restriction is to help provide unique URIs for use as MIB
            table indexes.  Note that normalization of URIs does not
            by itself provide uniqueness: Two textually distinct
            normalized URIs may be equivalent.

            STD 66 URIs are of unlimited length.  Objects using this
            textual convention impose an arbitrary length limit on the
            URIs that they can represent.  If no length restriction is
            required, then objects SHOULD use the 'Uri' textual
            convention instead."
   REFERENCE "RFC 3986 STD 66 and RFC 3305"
   SYNTAX      OCTET STRING (SIZE (0..255))

Uri1024 ::= TEXTUAL-CONVENTION
   DISPLAY-HINT "1024a"
   STATUS      current



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   DESCRIPTION
            "A Uniform Resource Identifier (URI) as defined by STD 66.

            This URI MUST be a normalized as defined in section 6 of
            RFC 3986 STD 66.  STD 66 defines that some parts of a URI
            are case-insensitive, but objects using this textual
            convention MUST use normalized URIs.  The purpose of this
            restriction is to help provide unique URIs for use as MIB
            table indexes.  Note that normalization of URIs does not
            by itself provide uniqueness: Two textually distinct
            normalized URIs may be equivalent.

            STD 66 URIs are of unlimited length.  Objects using this
            textual convention impose an arbitrary length limit on the
            URIs that they can represent.  If no length restriction is
            required, then objects SHOULD use the 'Uri' textual
            convention instead."
   REFERENCE "RFC 3986 STD 66 and RFC 3305"
   SYNTAX      OCTET STRING (SIZE (0..1024))

END


4.  Security Considerations

   Whenever using limited-size arrays to implement objects such as those
   defined by this MIB module, implementers are encouraged to check
   length and bounds on input and memory in order to avoid introducing
   buffer overflow vulnerabilities.

   This advice is particularly important for URLs, which have frequently
   been exploited in this way in recent years.

   SNMP versions prior to SNMPv3 did not include adequate security.
   Even if the network itself is secure (for example by using IPSec),
   even then, there is no control as to who on the secure network is
   allowed to access and GET/SET (read/change/create/delete) the objects
   in this MIB module.

   It is RECOMMENDED that implementers consider the security features as
   provided by the SNMPv3 framework (see [RFC3410], section 8),
   including full support for the SNMPv3 cryptographic mechanisms (for
   authentication and privacy).

   Further, deployment of SNMP versions prior to SNMPv3 is NOT
   RECOMMENDED.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
   enable cryptographic security.  It is then a customer/operator
   responsibility to ensure that the SNMP entity giving access to an



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   instance of this MIB module is properly configured to give access to
   the objects only to those principals (users) that have legitimate
   rights to indeed GET or SET (change/create/delete) them.

5.  IANA Considerations

   URI-MIB should be rooted under the mib-2 subtree.  IANA is requested
   to assign { mib-2 XXX } to the URI-MIB module specified in this
   document.

6.  Acknowledgements

   This module was generated by editing together suggestions from Randy
   Presuhn, Dan Romascanu, Bill Fenner, Jeurgen Schoenwaelder, and
   others.  The 'author' was in this case more of a 'secretary'."

7.  References

7.1  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2578]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Structure of Management Information
              Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.

   [RFC2579]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Textual Conventions for SMIv2",
              STD 58, RFC 2579, April 1999.

   [RFC2580]  McCloghrie, K., Perkins, D., and J. Schoenwaelder,
              "Conformance Statements for SMIv2", STD 58, RFC 2580,
              April 1999.

   [RFC3305]  Mealling, M. and R. Denenberg, "Report from the Joint W3C/
              IETF URI Planning Interest Group: Uniform Resource
              Identifiers (URIs), URLs, and Uniform Resource Names
              (URNs): Clarifications and Recommendations", RFC 3305,
              draft-mealling-uri-ig-02 (work in progress), Current
              Status INFORMATIONAL, August 2002.

   [RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
              Resource Identifier (URI): Generic Syntax", STD 66,
              RFC 3986, Was Internet-Draft
              draft-fielding-uri-rfc2396bis-07, Current Status STANDARD,
              January 2005.




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7.2  Informative References

   [RFC2434]  Narten, T. and H. Alvestrand, "Guidelines for Writing an
              IANA Considerations Section in RFCs", BCP 26, RFC 2434,
              October 1998.

   [RFC3410]  Case, J., Mundy, R., Partain, D., and B. Stewart,
              "Introduction and Applicability Statements for Internet-
              Standard Management Framework", RFC 3410, December 2002.

   [RFC3692]  Narten, T., "Assigning Experimental and Testing Numbers
              Considered Useful", BCP 82, RFC 3692,
              draft-narten-iana-experimental-allocations-05 (work in
              progress), Current Status BEST CURRENT PRACTICE,
              January 2004.


Author's Address

   David McWalter
   Data Connection Ltd
   100 Church Street
   Enfield  EN2 6BQ
   United Kingdom

   Email: dmcw@dataconnection.com

























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Intellectual Property Statement

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   this standard.  Please address the information to the IETF at
   ietf-ipr@ietf.org.


Disclaimer of Validity

   This document and the information contained herein are provided on an
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   THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF
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Copyright Statement

   Copyright (C) The IETF Trust (2006).  This document is subject to the
   rights, licenses and restrictions contained in BCP 78, and except as
   set forth therein, the authors retain all their rights.


Acknowledgment

   Funding for the RFC Editor function is currently provided by the
   Internet Society.




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