mirror of
https://git.openldap.org/openldap/openldap.git
synced 2024-12-27 03:20:22 +08:00
228 lines
7.1 KiB
Plaintext
228 lines
7.1 KiB
Plaintext
|
||
|
||
|
||
|
||
|
||
|
||
INTERNET-DRAFT Kurt D. Zeilenga
|
||
Intended Category: Standard Track OpenLDAP Foundation
|
||
Expires in six months 17 May 2002
|
||
|
||
|
||
Feature Discovery in LDAP
|
||
<draft-zeilenga-ldap-features-03.txt>
|
||
|
||
|
||
Status of this Memo
|
||
|
||
This document is an Internet-Draft and is in full conformance with all
|
||
provisions of Section 10 of RFC2026.
|
||
|
||
This document is intended to be, after appropriate review and
|
||
revision, submitted to the RFC Editor as an Standard Track document.
|
||
Distribution of this memo is unlimited. Technical discussion of this
|
||
document will take place on the IETF LDAP Extension Working Group
|
||
mailing list <ietf-ldapext@netscape.com>. Please send editorial
|
||
comments directly to the author <Kurt@OpenLDAP.org>.
|
||
|
||
Internet-Drafts are working documents of the Internet Engineering Task
|
||
Force (IETF), its areas, and its working groups. Note that other
|
||
groups may also distribute working documents as Internet-Drafts.
|
||
Internet-Drafts are draft documents valid for a maximum of six months
|
||
and may be updated, replaced, or obsoleted by other documents at any
|
||
time. It is inappropriate to use Internet-Drafts as reference
|
||
material or to cite them other than as ``work in progress.''
|
||
|
||
The list of current Internet-Drafts can be accessed at
|
||
<http://www.ietf.org/ietf/1id-abstracts.txt>. The list of
|
||
Internet-Draft Shadow Directories can be accessed at
|
||
<http://www.ietf.org/shadow.html>.
|
||
|
||
Copyright 2002, The Internet Society. All Rights Reserved.
|
||
|
||
Please see the Copyright section near the end of this document for
|
||
more information.
|
||
|
||
|
||
Abstract
|
||
|
||
The Lightweight Directory Access Protocol (LDAP) is an extensible
|
||
protocol with numerous elective features. This document introduces a
|
||
general mechanism for discovery of elective features and extensions
|
||
which cannot be discovered using existing mechanisms.
|
||
|
||
|
||
|
||
|
||
|
||
Zeilenga draft-zeilenga-ldap-features-03 [Page 1]
|
||
|
||
INTERNET-DRAFT LDAP supportedFeatures 17 May 2002
|
||
|
||
|
||
1. Background and Intended Use
|
||
|
||
LDAP [RFC2251] is an extensible protocol with numerous elective
|
||
features. LDAP provides mechanisms for a client to discover supported
|
||
protocol versions, controls, extended operations, SASL mechanisms, and
|
||
subschema information. However, these mechanisms are not designed to
|
||
support general feature discovery.
|
||
|
||
This document describes a simple, general-purpose mechanism which
|
||
clients may use to discover the set of features supported by a server.
|
||
|
||
Schema definitions are provided using LDAPv3 description formats
|
||
[RFC2252]. Definitions provided here are formatted (line wrapped) for
|
||
readability.
|
||
|
||
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 BCP 14 [RFC2119].
|
||
|
||
|
||
2. Discovery of supported features
|
||
|
||
Each feature whose support may be discovered SHALL be identified by an
|
||
Object Identifier (OID). A server advertises its support for a given
|
||
feature by providing the OID associated with the feature as a value of
|
||
the supportedFeatures attribute held in the root DSE. A client may
|
||
examine the values of this attribute to determine if a particular
|
||
feature is supported by the server.
|
||
|
||
The supportedFeatures attribute type is described as follows:
|
||
|
||
( 1.3.6.1.4.1.4203.1.3.5
|
||
NAME 'supportedFeatures'
|
||
DESC 'features supported by the server'
|
||
EQUALITY objectIdentifierMatch
|
||
SYNTAX 1.3.6.1.4.1.1466.115.121.1.38
|
||
USAGE dSAOperation )
|
||
|
||
Servers MUST be capable of recognizing this attribute type by the name
|
||
'supportedFeatures'. Servers MAY recognize the attribute type by
|
||
other names.
|
||
|
||
|
||
3. Security Considerations
|
||
|
||
As rogue clients can discover features of a server by other means
|
||
(such as by trial and error), this feature discovery mechanism is not
|
||
believed to introduce any new security risk to LDAP.
|
||
|
||
|
||
|
||
Zeilenga draft-zeilenga-ldap-features-03 [Page 2]
|
||
|
||
INTERNET-DRAFT LDAP supportedFeatures 17 May 2002
|
||
|
||
|
||
4. IANA Considerations
|
||
|
||
It is requested that IANA register the LDAP 'supportedFeatures'
|
||
descriptor used in this document per the following registration
|
||
template:
|
||
|
||
Subject: Request for LDAP Descriptor Registration
|
||
Descriptor (short name): supportedFeatures
|
||
Object Identifier: 1.3.6.1.4.1.4203.1.3.5
|
||
Person & email address to contact for further information:
|
||
Kurt Zeilenga <kurt@OpenLDAP.org>
|
||
Usage: Attribute Type
|
||
Specification: RFCXXXX
|
||
Author/Change Controller: IESG
|
||
|
||
|
||
This OID was assigned [ASSIGN] by OpenLDAP Foundation under its IANA
|
||
assigned private enterprise allocation [PRIVATE] for use in this
|
||
specification.
|
||
|
||
|
||
5. Acknowledgment
|
||
|
||
This document is based upon input from the IETF LDAPext working group.
|
||
|
||
|
||
6. Author's Address
|
||
|
||
Kurt D. Zeilenga
|
||
OpenLDAP Foundation
|
||
<Kurt@OpenLDAP.org>
|
||
|
||
|
||
7. Normative References
|
||
|
||
[RFC2119] S. Bradner, "Key words for use in RFCs to Indicate
|
||
Requirement Levels", BCP 14 (also RFC 2119), March 1997.
|
||
|
||
[RFC2251] M. Wahl, T. Howes, S. Kille, "Lightweight Directory Access
|
||
Protocol (v3)", RFC 2251, December 1997.
|
||
|
||
[RFC2252] M. Wahl, A. Coulbeck, T. Howes, S. Kille, "Lightweight
|
||
Directory Access Protocol (v3): Attribute Syntax
|
||
Definitions", RFC 2252, December 1997.
|
||
|
||
|
||
8. Informative References
|
||
|
||
|
||
|
||
|
||
Zeilenga draft-zeilenga-ldap-features-03 [Page 3]
|
||
|
||
INTERNET-DRAFT LDAP supportedFeatures 17 May 2002
|
||
|
||
|
||
Full Copyright
|
||
|
||
Copyright 2002, The Internet Society. All Rights Reserved.
|
||
|
||
This document and translations of it may be copied and furnished to
|
||
others, and derivative works that comment on or otherwise explain it
|
||
or assist in its implementation may be prepared, copied, published and
|
||
distributed, in whole or in part, without restriction of any kind,
|
||
provided that the above copyright notice and this paragraph are
|
||
included on all such copies and derivative works. However, this
|
||
document itself may not be modified in any way, such as by removing
|
||
the copyright notice or references to the Internet Society or other
|
||
Internet organizations, except as needed for the purpose of
|
||
developing Internet standards in which case the procedures for
|
||
copyrights defined in the Internet Standards process must be followed,
|
||
or as required to translate it into languages other than English.
|
||
|
||
The limited permissions granted above are perpetual and will not be
|
||
revoked by the Internet Society or its successors or assigns.
|
||
|
||
This document and the information contained herein is provided on an
|
||
"AS IS" basis and THE AUTHORS, THE INTERNET SOCIETY, AND THE INTERNET
|
||
ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
|
||
INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
|
||
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
|
||
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
Zeilenga draft-zeilenga-ldap-features-03 [Page 4]
|
||
|