Diameter Applications Design Guidelines
draft-ietf-dime-app-design-guide-18

Diameter Maintenance and Extensions (DIME)                L. Morand, Ed.
Internet-Draft                                               Orange Labs
Intended status: Informational                                V. Fajardo
Expires: December 08, 2013
                                                           H. Tschofenig
                                                  Nokia Siemens Networks
                                                           June 06, 2013

                Diameter Applications Design Guidelines
                  draft-ietf-dime-app-design-guide-18

Abstract

   The Diameter base protocol provides facilities for protocol
   extensibility enabling to define new Diameter applications or modify
   existing applications.  This document is a companion document to the
   Diameter Base protocol that further explains and clarifies the rules
   to extend Diameter.  It is meant as a guidelines document and
   therefore as informative in nature.

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   This Internet-Draft will expire on December 08, 2013.

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   Copyright (c) 2013 IETF Trust and the persons identified as the
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Morand, et al.          Expires December 08, 2013               [Page 1]
Internet-Draft   Diameter Applications Design Guidelines       June 2013

   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Reusing Existing Diameter Applications  . . . . . . . . . . .   5
     4.1.  Adding a New Command  . . . . . . . . . . . . . . . . . .   5
     4.2.  Deleting an Existing Command  . . . . . . . . . . . . . .   6
     4.3.  Reusing Existing Commands . . . . . . . . . . . . . . . .   6
       4.3.1.  Adding AVPs to a Command  . . . . . . . . . . . . . .   6
       4.3.2.  Deleting AVPs from a Command  . . . . . . . . . . . .   8
     4.4.  Reusing Existing AVPs . . . . . . . . . . . . . . . . . .   9
       4.4.1.  Setting of the AVP Flags  . . . . . . . . . . . . . .   9
       4.4.2.  Reuse of AVP of Type Enumerated . . . . . . . . . . .   9
   5.  Defining New Diameter Applications  . . . . . . . . . . . . .   9
     5.1.  Introduction  . . . . . . . . . . . . . . . . . . . . . .   9
     5.2.  Defining New Commands . . . . . . . . . . . . . . . . . .  10
     5.3.  Use of Application-Id in a Message  . . . . . . . . . . .  10
     5.4.  Application-Specific Session State Machines . . . . . . .  11
     5.5.  Session-Id AVP and Session Management . . . . . . . . . .  11
     5.6.  Use of Enumerated Type AVPs . . . . . . . . . . . . . . .  12
     5.7.  Application-Specific Message Routing  . . . . . . . . . .  12
     5.8.  Translation Agents  . . . . . . . . . . . . . . . . . . .  13
     5.9.  End-to-End Application Capabilities Exchange  . . . . . .  14
     5.10. Diameter Accounting Support . . . . . . . . . . . . . . .  14
     5.11. Diameter Security Mechanisms  . . . . . . . . . . . . . .  16
   6.  Defining Generic Diameter Extensions  . . . . . . . . . . . .  16
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   9.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  18
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  18
   11. Informative References  . . . . . . . . . . . . . . . . . . .  18
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  20

1.  Introduction