DIAMETER

[From RFC 3588] "The Diameter base protocol is intended to provide an Authentication, Authorization and Accounting (AAA) framework for applications such as network access or IP mobility. Diameter is also intended to work in both local Authentication, Authorization & Accounting and roaming situations. This document specifies the message format, transport, error reporting, accounting and security services to be used by all Diameter applications. The Diameter base application needs to be supported by all Diameter implementations".

History

This is the successor of the RADIUS protocol.

Protocol dependencies

Example traffic

Diameter Protocol
    Version: 0x01
    Length: 312
    Flags: 0x80
    Command Code: 272 Credit-Control
    ApplicationId: 16777266
    Hop-by-Hop Identifier: 0x00000002
    End-to-End Identifier: 0x00000002
    [Answer In: 6]
    AVP: Session-Id(263) l=47 f=-M- val=rosso.C1R1.com;4FD78691;5458;3B9ACA00;0
    AVP: Origin-Host(264) l=22 f=-M- val=rosso.C1R1.com
    AVP: Origin-Realm(296) l=16 f=-M- val=C1R1.com
    AVP: Destination-Realm(283) l=14 f=-M- val=R1.com
    AVP: CC-Request-Type(416) l=12 f=-M- val=INITIAL_REQUEST (1)
    AVP: CC-Request-Number(415) l=12 f=-M- val=0
    AVP: Subscription-Id(443) l=44 f=-M-

Wireshark

The DIAMETER dissector is fully functional. The dissection of AVPs is specified in .xml files in the diameter directory. You can add AVP dissection of vendor-specific or missing AVPs by editing those files. If you add publicly available AVPs please send us the updates.

Currently there is a problem with application Id: if two AVPs have the same vendor Id but different Application ID WS can't distinguish between them (Bug 1494).

A known problem is 3GPP vendor specific AVPs in the range 1 - 26 in TGPPGmb.xml and imscxdx.xml which are mutually exclusive; depending on which 3GPP interface you are tracing one set will have to be commented out. (In the Wireshark distribution, the set in imscxdx.xml is commented out).

Preference Settings

Example capture file

XXX - Add a simple example capture file to the SampleCaptures page and link from here. Keep it short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically.

Display Filter

A complete list of DIAMETER display filter fields can be found in the display filter reference

Capture Filter

You cannot directly filter DIAMETER protocols while capturing. However, if you know the TCP or SCTP port used (see above), you can filter on that one.

Internet-drafts:

* Client SMTP Validation (CSV)

Open source Diameter implementation:

Discussion

DIAMETER (last edited 2014-04-16 20:07:46 by JeffMorriss)