Gecko [ www.finalhopeacademy.com ]

Name	Size	Permission
INDEX	3.21 KB	-rw-r--r--
rfc2079.txt	8.55 KB	-rw-r--r--
rfc2247.txt	12.12 KB	-rw-r--r--
rfc2293.txt	12.25 KB	-rw-r--r--
rfc2294.txt	21.54 KB	-rw-r--r--
rfc2307.txt	40.43 KB	-rw-r--r--
rfc2377.txt	37.38 KB	-rw-r--r--
rfc2589.txt	26.23 KB	-rw-r--r--
rfc2649.txt	19.99 KB	-rw-r--r--
rfc2696.txt	12.51 KB	-rw-r--r--
rfc2713.txt	39.79 KB	-rw-r--r--
rfc2714.txt	14.36 KB	-rw-r--r--
rfc2798.txt	32.16 KB	-rw-r--r--
rfc2849.txt	25.41 KB	-rw-r--r--
rfc2891.txt	15.46 KB	-rw-r--r--
rfc2926.txt	54.07 KB	-rw-r--r--
rfc3045.txt	10.27 KB	-rw-r--r--
rfc3062.txt	11.53 KB	-rw-r--r--
rfc3088.txt	19.01 KB	-rw-r--r--
rfc3112.txt	16.71 KB	-rw-r--r--
rfc3296.txt	26.75 KB	-rw-r--r--
rfc3663.txt	41.27 KB	-rw-r--r--
rfc3671.txt	17.49 KB	-rw-r--r--
rfc3672.txt	23.87 KB	-rw-r--r--
rfc3673.txt	9.77 KB	-rw-r--r--
rfc3687.txt	94 KB	-rw-r--r--
rfc3698.txt	17.15 KB	-rw-r--r--
rfc3703.txt	139.63 KB	-rw-r--r--
rfc3712.txt	60.84 KB	-rw-r--r--
rfc3727.txt	8.1 KB	-rw-r--r--
rfc3829.txt	11.71 KB	-rw-r--r--
rfc3866.txt	30.76 KB	-rw-r--r--
rfc3876.txt	23.67 KB	-rw-r--r--
rfc3909.txt	13.11 KB	-rw-r--r--
rfc3928.txt	69.2 KB	-rw-r--r--
rfc4013.txt	12.75 KB	-rw-r--r--
rfc4370.txt	10.38 KB	-rw-r--r--
rfc4373.txt	30.36 KB	-rw-r--r--
rfc4403.txt	76.9 KB	-rw-r--r--
rfc4510.txt	12.06 KB	-rw-r--r--
rfc4511.txt	146.6 KB	-rw-r--r--
rfc4512.txt	105.84 KB	-rw-r--r--
rfc4513.txt	78.66 KB	-rw-r--r--
rfc4514.txt	31.11 KB	-rw-r--r--
rfc4515.txt	23.33 KB	-rw-r--r--
rfc4516.txt	29.85 KB	-rw-r--r--
rfc4517.txt	111.61 KB	-rw-r--r--
rfc4518.txt	27.51 KB	-rw-r--r--
rfc4519.txt	63.47 KB	-rw-r--r--
rfc4520.txt	33.49 KB	-rw-r--r--
rfc4521.txt	33.77 KB	-rw-r--r--
rfc4522.txt	15.89 KB	-rw-r--r--
rfc4523.txt	42.73 KB	-rw-r--r--
rfc4524.txt	49.52 KB	-rw-r--r--
rfc4525.txt	10.99 KB	-rw-r--r--
rfc4526.txt	9.86 KB	-rw-r--r--
rfc4527.txt	15.61 KB	-rw-r--r--
rfc4528.txt	12.25 KB	-rw-r--r--
rfc4529.txt	11.46 KB	-rw-r--r--
rfc4530.txt	14.83 KB	-rw-r--r--
rfc4531.txt	18.54 KB	-rw-r--r--
rfc4532.txt	13.91 KB	-rw-r--r--
rfc4533.txt	72.16 KB	-rw-r--r--
rfc5020.txt	8.41 KB	-rw-r--r--
rfc5805.txt	21.21 KB	-rw-r--r--

Code Editor : rfc3909.txt

Network Working Group                                        K. Zeilenga
Request for Comments: 3909                           OpenLDAP Foundation
Category: Standards Track                                   October 2004

Lightweight Directory Access Protocol (LDAP)
                            Cancel Operation

Status of this Memo

This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Abstract

This specification describes a Lightweight Directory Access Protocol
   (LDAP) extended operation to cancel (or abandon) an outstanding
   operation.  Unlike the LDAP Abandon operation, but like the X.511
   Directory Access Protocol (DAP) Abandon operation, this operation has
   a response which provides an indication of its outcome.

1.  Background and Intent of Use

The Lightweight Directory Access Protocol (LDAP) [RFC3377] provides
   an Abandon operation [RFC2251] which clients may use to cancel other
   operations.  The Abandon operation does not have a response and
   requires no response from the abandoned operation.  These semantics
   provide the client with no clear indication of the outcome of the
   Abandon operation.

The X.511 Directory Access Protocol (DAP) [X.511] provides an Abandon
   operation which has a response and also requires the abandoned
   operation to return a response indicating it was canceled.  The LDAP
   Cancel operation is modeled after the DAP Abandon operation.

The LDAP Cancel operation SHOULD be used instead of the LDAP Abandon
   operation when the client needs an indication of the outcome.  This
   operation may be used to cancel both interrogation and update
   operations.

Zeilenga                    Standards Track                     [Page 1]

RFC 3909                 LDAP Cancel Operation              October 2004

Protocol elements are described using ASN.1 [X.680] with implicit
   tags.  The term "BER-encoded" means the element is to be encoded
   using the Basic Encoding Rules [X.690] under the restrictions
   detailed in Section 5.1 of [RFC2251].

DSA stands for Directory System Agent (or server).
   DSE stands for DSA-specific Entry.

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.  Cancel Operation

The Cancel operation is defined as an LDAP Extended Operation
   [RFC2251, Section 4.12] identified by the object identifier
   1.3.6.1.1.8.  This section details the syntax of the Cancel request
   and response messages and defines additional LDAP resultCodes.

2.1.  Cancel Request

The Cancel request is an ExtendedRequest with the requestName field
   containing 1.3.6.1.1.8 and a requestValue field which contains a
   BER-encoded cancelRequestValue value.

cancelRequestValue ::= SEQUENCE {
          cancelID        MessageID
                          -- MessageID is as defined in [RFC2251]
      }

The cancelID field contains the message ID associated with the
   operation to be canceled.

2.2.  Cancel Response

A Cancel response is an ExtendedResponse where the responseName and
   response fields are absent.

2.3.  Additional Result Codes

Implementations of this specification SHALL recognize the following
   additional resultCode values:

canceled        (118)
      noSuchOperation (119)
      tooLate         (120)
      cannotCancel    (121)

Zeilenga                    Standards Track                     [Page 2]

RFC 3909                 LDAP Cancel Operation              October 2004

3.  Operational Semantics

The function of the Cancel Operation is to request that the server
   cancel an outstanding operation issued within the same session.

The client requests the cancelation of an outstanding operation by
   issuing a Cancel Response with a cancelID set to the message ID of
   the outstanding operation.  The Cancel Request itself has a distinct
   message ID.  Clients SHOULD NOT request the cancelation of an
   operation multiple times.

If the server is willing and able to cancel the outstanding operation
   identified by the cancelId, the server SHALL return a Cancel Response
   with a success resultCode, and the canceled operation SHALL fail with
   canceled resultCode.  Otherwise the Cancel Response SHALL have a
   non-success resultCode and SHALL NOT have an impact upon the
   outstanding operation (if it exists).

The protocolError resultCode is returned if the server is unable to
   parse the requestValue or the requestValue is absent,

The noSuchOperation resultCode is returned if the server has no
   knowledge of the operation requested for cancelation.

The cannotCancel resultCode is returned if the identified operation
   does not support cancelation or the cancel operation could not be
   performed.  The following classes of operations are not cancelable:

-  operations which have no response,

-  operations which create, alter, or destroy authentication and/or
      authorization associations,

-  operations which establish, alter, or tear-down security services,
      and

-  operations which abandon or cancel other operations.

Specifically, the Abandon, Bind, Start TLS [RFC2830], Unbind, and
   Cancel operations are not cancelable.

The Cancel operation cannot be abandoned.

The tooLate resultCode is returned to indicate that it is too late to
   cancel the outstanding operation.  For example, the server may return
   tooLate for a request to cancel an outstanding modify operation which
   has already committed updates to the underlying data store.

Zeilenga                    Standards Track                     [Page 3]

RFC 3909                 LDAP Cancel Operation              October 2004

Servers SHOULD indicate their support for this extended operation by
   providing 1.3.6.1.1.8 as a value of the 'supportedExtension'
   attribute type in their root DSE.  A server MAY choose to advertise
   this extension only when the client is authorized to use it.

4.  Security Considerations

This operation is intended to allow a user to cancel operations they
   previously issued during the current LDAP association.  In certain
   cases, such as when the Proxy Authorization Control is in use,
   different outstanding operations may be processed under different
   LDAP associations.  Servers MUST NOT allow a user to cancel an
   operation belonging to another user.

Some operations should not be cancelable for security reasons.  This
   specification disallows the cancelation of the Bind operation and
   Start TLS extended operation so as to avoid adding complexity to
   authentication, authorization, and security layer semantics.
   Designers of future extended operations and/or controls should
   disallow abandonment and cancelation when appropriate.

5.  IANA Considerations

The following values [RFC3383] have been registered by the IANA.

5.1.  Object Identifier

The IANA has registered upon Standards Action the LDAP Object
   Identifier 1.3.6.1.1.8 to identify the LDAP Cancel Operation as
   defined in this document.

Subject: Request for LDAP Object Identifier Registration
      Person & email address to contact for further information:
           Kurt Zeilenga <kurt@OpenLDAP.org>
      Specification: RFC 3909
      Author/Change Controller: IESG
      Comments:
           Identifies the LDAP Cancel Operation

Zeilenga                    Standards Track                     [Page 4]

RFC 3909                 LDAP Cancel Operation              October 2004

5.2.  LDAP Protocol Mechanism

The IANA has registered upon Standards Action the LDAP Protocol
   Mechanism described in this document.

Subject: LDAP Protocol Mechanism Registration
      Object Identifier: 1.3.6.1.1.8
      Description: LDAP Cancel Operation
      Person & email address to contact for further information:
           Kurt Zeilenga <kurt@openldap.org>
      Usage: Extended Operation
      Specification: RFC 3909
      Author/Change Controller: IESG
      Comments: none

5.3.  LDAP Result Codes

The IANA has registered upon Standards Action the LDAP Result Codes
   described in this document.

Subject: LDAP Result Code Registration
      Person & email address to contact for further information:
           Kurt Zeilenga <kurt@OpenLDAP.org>
      Result Code Name: canceled (118)
      Result Code Name: noSuchOperation (119)
      Result Code Name: tooLate (120)
      Result Code Name: cannotCancel (121)
      Specification: RFC 3909
      Author/Change Controller: IESG

6.  Acknowledgment

The LDAP Cancel operation is modeled after the X.511 DAP Abandon
   operation.

Zeilenga                    Standards Track                     [Page 5]

RFC 3909                 LDAP Cancel Operation              October 2004

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.

[RFC2251]  Wahl, M., Howes, T., and S. Kille, "Lightweight Directory
              Access Protocol (v3)", RFC 2251, December 1997.

[RFC2830]  Hodges, J., Morgan, R., and M. Wahl, "Lightweight
              Directory Access Protocol (v3): Extension for Transport
              Layer Security", RFC 2830, May 2000.

[RFC3377]  Hodges, J. and R. Morgan, "Lightweight Directory Access
              Protocol (v3): Technical Specification", RFC 3377,
              September 2002.

[X.680]    International Telecommunication Union - Telecommunication
              Standardization Sector, "Abstract Syntax Notation One
              (ASN.1) - Specification of Basic Notation", X.680(1997)
              (also ISO/IEC 8824-1:1998).

[X.690]    International Telecommunication Union - Telecommunication
              Standardization Sector, "Specification of ASN.1 encoding
              rules: Basic Encoding Rules (BER), Canonical Encoding
              Rules (CER), and Distinguished Encoding Rules (DER)",
              X.690(1997) (also ISO/IEC 8825-1:1998).

7.2.  Informative References

[RFC3383]  Zeilenga, K., "Internet Assigned Numbers Authority (IANA)
              Considerations for the Lightweight Directory Access
              Protocol (LDAP)", BCP 64, RFC 3383, September 2002.

[X.511]    International Telecommunication Union - Telecommunication
              Standardization Sector, "The Directory: Abstract Service
              Definition", X.511(1993).

8.  Author's Address

Kurt D. Zeilenga
   OpenLDAP Foundation

EMail: Kurt@OpenLDAP.org

Zeilenga                    Standards Track                     [Page 6]

RFC 3909                 LDAP Cancel Operation              October 2004

9.  Full Copyright Statement

This document is subject to the rights, licenses and restrictions
   contained in BCP 78, and at www.rfc-editor.org, and except as set
   forth therein, the authors retain all their rights.

This document and the information contained herein are provided on an
   "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
   OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
   ENGINEERING TASK FORCE DISCLAIM 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.

Intellectual Property

The IETF takes no position regarding the validity or scope of any
   Intellectual Property Rights or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; nor does it represent that it has
   made any independent effort to identify any such rights.  Information
   on the ISOC's procedures with respect to rights in ISOC Documents can
   be found in BCP 78 and BCP 79.

Copies of IPR disclosures made to the IETF Secretariat and any
   assurances of licenses to be made available, or the result of an
   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at
   http://www.ietf.org/ipr.

The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement
   this standard.  Please address the information to the IETF at ietf-
   ipr@ietf.org.

Acknowledgement

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

Zeilenga                    Standards Track                     [Page 7]

${this.title}

Code Editor : rfc3909.txt