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authorFredrik Gustafsson <[email protected]>2012-12-03 10:22:40 +0100
committerFredrik Gustafsson <[email protected]>2012-12-03 10:22:40 +0100
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Merge branch 'fredrik/ssh/fix-idle-tests' into fredrik/ssh/rekeying
* fredrik/ssh/fix-idle-tests: (50 commits) Modifications to idle_time testcase Teach Win installer to handle redist on w2012/w8 ssl: Receive port EXIT-message so that it does not get mixed up with the protocol-error message we are expecting ssl: Add and enhance tests ssl: Consider new server options when resuming a session Prepare release ssl: Add dependencies to Makefile Simplify the code for the generated info/0 function Don't try to work around a non-loadable NIF library Fix BER encoding when multiple levels of typedefs are used Update megaco documentation Update documentation for the asn1 application Fix other applications Fix use of asn1 in megaco Remove the unused asn1ct_gen_ber module Fix erroneous skipping for jinterface, erl_interface and ic kernel: Heart port needs to be unregistered Update preloaded modules Update primary bootstrap Update copyright years ...
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-
-Network Working Group K. Jiao
-Internet-Draft Huawei
-Intended status: Standards Track G. Zorn
-Expires: April 27, 2011 Network Zen
- October 24, 2010
-
-
- The Diameter Capabilities Update Application
- draft-ietf-dime-capablities-update-07
-
-Abstract
-
- This document defines a new Diameter application and associated
- command codes. The Capabilities Update application is intended to
- allow the dynamic update of certain Diameter peer capabilities while
- the peer-to-peer connection is in the open state.
-
-Status of this Memo
-
- This Internet-Draft is submitted in full conformance with the
- provisions of BCP 78 and BCP 79.
-
- Internet-Drafts are working documents of the Internet Engineering
- Task Force (IETF). Note that other groups may also distribute
- working documents as Internet-Drafts. The list of current Internet-
- Drafts is at http://datatracker.ietf.org/drafts/current/.
-
- 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."
-
- This Internet-Draft will expire on April 27, 2011.
-
-Copyright Notice
-
- Copyright (c) 2010 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
- Provisions Relating to IETF Documents
- (http://trustee.ietf.org/license-info) in effect on the date of
- publication of this document. Please review these documents
- carefully, as they describe your rights and restrictions with respect
- to this document. Code Components extracted from this document must
- include Simplified BSD License text as described in Section 4.e of
- the Trust Legal Provisions and are provided without warranty as
- described in the Simplified BSD License.
-
-
-
-Jiao & Zorn Expires April 27, 2011 [Page 1]
-
-Internet-Draft Diameter Capabilities Update October 2010
-
-
-Table of Contents
-
- 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
- 2. Specification of Requirements . . . . . . . . . . . . . . . . . 3
- 3. Diameter Protocol Considerations . . . . . . . . . . . . . . . 3
- 4. Capabilities Update . . . . . . . . . . . . . . . . . . . . . . 3
- 4.1. Command-Code Values . . . . . . . . . . . . . . . . . . . . 4
- 4.1.1. Capabilities-Update-Request . . . . . . . . . . . . . . 5
- 4.1.2. Capabilities-Update-Answer . . . . . . . . . . . . . . 5
- 5. Security Considerations . . . . . . . . . . . . . . . . . . . . 6
- 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
- 6.1. Application Identifier . . . . . . . . . . . . . . . . . . 6
- 6.2. Command Codes . . . . . . . . . . . . . . . . . . . . . . . 6
- 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 6
- 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 6
- 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6
- 9.1. Normative References . . . . . . . . . . . . . . . . . . . 6
- 9.2. Informative References . . . . . . . . . . . . . . . . . . 7
- Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 7
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-Jiao & Zorn Expires April 27, 2011 [Page 2]
-
-Internet-Draft Diameter Capabilities Update October 2010
-
-
-1. Introduction
-
- Capabilities exchange is an important component of the Diameter Base
- Protocol [I-D.ietf-dime-rfc3588bis], allowing peers to exchange
- identities and Diameter capabilities (protocol version number,
- supported Diameter applications, security mechanisms, etc.). As
- defined in RFC 3588, however, the capabilities exchange process takes
- place only once, at the inception of a transport connection between a
- given pair of peers. Therefore, if a peer's capabilities change (due
- to software update, for example), the existing connection(s) must be
- torn down (along with all of the associated user sessions) and
- restarted before the modified capabilities can be advertised.
-
- This document defines a new Diameter application intended to allow
- the dynamic update of a subset of Diameter peer capabilities over an
- existing connection. Because the Capabilities Update application
- specified herein operates over an existing transport connection,
- modification of certain capabilities is prohibited. Specifically,
- modifying the security mechanism in use is not allowed; if the
- security method used between a pair of peers is changed the affected
- connection MUST be restarted.
-
-
-2. Specification of Requirements
-
- 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].
-
-
-3. Diameter Protocol Considerations
-
- This section details the relationship of the Diameter Capabilities
- Update application to the Diameter Base Protocol.
-
- This document specifies Diameter Application-ID <TBD1>. Diameter
- nodes conforming to this specification MUST advertise support by
- including the value <TBD1> in the Auth-Application-Id of the
- Capabilities-Exchange-Request (CER) and Capabilities-Exchange-Answer
- (CEA) commands [I-D.ietf-dime-rfc3588bis].
-
-
-4. Capabilities Update
-
- When the capabilities of a Diameter node conforming to this
- specification change, it MUST notify all of the nodes with which it
- has an open transport connection and which have also advertised
- support for the Capabilities Update application using the
-
-
-
-Jiao & Zorn Expires April 27, 2011 [Page 3]
-
-Internet-Draft Diameter Capabilities Update October 2010
-
-
- Capabilities-Update-Request (CUR) message (Section 4.1.1). This
- message allows the update of a peer's capabilities (supported
- Diameter applications, etc.).
-
- A Diameter node only issues a given command to those peers that have
- advertised support for the Diameter application that defines the
- command; a Diameter node must cache the supported applications in
- order to ensure that unrecognized commands and/or Attribute-Value
- Pairs (AVPs) are not unnecessarily sent to a peer.
-
- The receiver of the CUR MUST determine common applications by
- computing the intersection of its own set of supported Application Id
- against all of the application identifier AVPs (Auth-Application-Id,
- Acct-Application-Id and Vendor-Specific- Application-Id) present in
- the CUR. The value of the Vendor-Id AVP in the Vendor-Specific-
- Application-Id MUST NOT be used during computation.
-
- If the receiver of a CUR does not have any applications in common
- with the sender then it MUST return a Capabilities-Update-Answer
- (CUA) (Section 4.1.2) with the Result-Code AVP set to
- DIAMETER_NO_COMMON_APPLICATION [I-D.ietf-dime-rfc3588bis], and SHOULD
- disconnect the transport layer connection; however, if active
- sessions are using the connection, peers MAY delay disconnection
- until the sessions can be redirected or gracefully terminated. Note
- that receiving a CUA from a peer advertising itself as a Relay (see
- [I-D.ietf-dime-rfc3588bis], Section 2.4) MUST be interpreted as
- having common applications with the peer.
-
- As for CER/CEA messages, the CUR and CUA messages MUST NOT be
- proxied, redirected or relayed.
-
- Even though the CUR/CUA messages cannot be proxied, it is still
- possible for an upstream agent to receive a message for which there
- are no peers available to handle the application that corresponds to
- the Command-Code. This could happen if, for example, the peers are
- too busy or down. In such instances, the 'E' bit MUST be set in the
- answer message with the Result-Code AVP set to
- DIAMETER_UNABLE_TO_DELIVER to inform the downstream peer to take
- action (e.g., re-routing requests to an alternate peer).
-
-4.1. Command-Code Values
-
- This section defines Command-Code [I-D.ietf-dime-rfc3588bis] values
- that MUST be supported by all Diameter implementations conforming to
- this specification. The following Command Codes are defined (using
- modified ABNF [I-D.ietf-dime-rfc3588bis]) in this document:
- Capabilities-Update-Request (CUR, Section 4.1.1) and Capabilities-
- Update-Answer (CUA, Section 4.1.2).
-
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-Jiao & Zorn Expires April 27, 2011 [Page 4]
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-Internet-Draft Diameter Capabilities Update October 2010
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-4.1.1. Capabilities-Update-Request
-
- The Capabilities-Update-Request (CUR), indicated by the Command-Code
- set to <CUCC> and the Command Flags' 'R' bit set, is sent to update
- local capabilities. Upon detection of a transport failure, this
- message MUST NOT be sent to an alternate peer.
-
- When Diameter is run over the Stream Control Transmission Protocol
- [RFC4960], which allows connections to span multiple interfaces and
- multiple IP addresses, the Capabilities-Update-Request message MUST
- contain one Host-IP-Address AVP for each potential IP address that
- may be locally used when transmitting Diameter messages.
-
- Message Format
-
- <CUR> ::= < Diameter Header: <CUCC>, REQ >
- { Origin-Host }
- { Origin-Realm }
- 1* { Host-IP-Address }
- { Vendor-Id }
- { Product-Name }
- [ Origin-State-Id ]
- * [ Supported-Vendor-Id ]
- * [ Auth-Application-Id ]
- * [ Acct-Application-Id ]
- * [ Vendor-Specific-Application-Id ]
- [ Firmware-Revision ]
- * [ AVP ]
-
-4.1.2. Capabilities-Update-Answer
-
- The Capabilities-Update-Answer, indicated by the Command-Code set to
- <CUCC> and the Command Flags' 'R' bit cleared, is sent in response to
- a CUR message.
-
- Message Format
-
- <CUA> ::= < Diameter Header: <CUCC> >
- { Origin-Host }
- { Origin-Realm }
- { Result-Code }
- [ Error-Message ]
- * [ AVP ]
-
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-Jiao & Zorn Expires April 27, 2011 [Page 5]
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-Internet-Draft Diameter Capabilities Update October 2010
-
-
-5. Security Considerations
-
- The security considerations applicable to the Diameter Base Protocol
- [I-D.ietf-dime-rfc3588bis] are also applicable to this document.
-
-
-6. IANA Considerations
-
- This section explains the criteria to be used by the IANA for
- assignment of numbers within namespaces used within this document.
-
-6.1. Application Identifier
-
- This specification assigns the value <TBD1> from the Application
- Identifiers namespace [I-D.ietf-dime-rfc3588bis]. See Section 3 for
- the assignment of the namespace in this specification.
-
-6.2. Command Codes
-
- This specification assigns the value <CUCC> from the Command Codes
- namespace [I-D.ietf-dime-rfc3588bis]. See Section 4.1 for the
- assignment of the namespace in this specification.
-
-
-7. Contributors
-
- This document is based upon work done by Tina Tsou.
-
-
-8. Acknowledgements
-
- Thanks to Sebastien Decugis, Niklas Neumann, Subash Comerica, Lionel
- Morand, Dan Romascanu, Dan Harkins and Ravi for helpful review and
- discussion.
-
-
-9. References
-
-9.1. Normative References
-
- [I-D.ietf-dime-rfc3588bis]
- Fajardo, V., Arkko, J., Loughney, J., and G. Zorn,
- "Diameter Base Protocol", draft-ietf-dime-rfc3588bis-25
- (work in progress), September 2010.
-
- [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
- Requirement Levels", BCP 14, RFC 2119, March 1997.
-
-
-
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-Internet-Draft Diameter Capabilities Update October 2010
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-
-9.2. Informative References
-
- [RFC4960] Stewart, R., "Stream Control Transmission Protocol",
- RFC 4960, September 2007.
-
-
-Authors' Addresses
-
- Jiao Kang
- Huawei Technologies
- Section B1, Huawei Industrial Base
- Bantian, Longgang District
- Shenzhen 518129
- P.R. China
-
- Phone: +86 755 2878-6690
-
-
- Glen Zorn
- Network Zen
- 227/358 Thanon Sanphawut
- Bang Na, Bangkok 10260
- Thailand
-
- Phone: +66 (0) 87-040-4617
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