Re: [Dime] RFC 6733 Commands

Yuval Lifshitz <ylifshitz@sandvine.com> Wed, 19 July 2017 09:32 UTC

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From: Yuval Lifshitz <ylifshitz@sandvine.com>
To: "Bertz, Lyle T [CTO]" <Lyle.T.Bertz@sprint.com>, "lionel.morand@orange.com" <lionel.morand@orange.com>, "dime@ietf.org list" <dime@ietf.org>
Thread-Topic: RFC 6733 Commands
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Date: Wed, 19 Jul 2017 09:32:18 +0000
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Subject: Re: [Dime] RFC 6733 Commands
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Actually, we may have an issue there. The spec says that zero must be used for base protocol messages (page 23):

Diameter messages pertaining to peer connection
   establishment and maintenance such as CER/CEA, DWR/DWA, and DPR/DPA
   MUST carry an Application Id of zero (0).

But does not say that it must not be used for anything else (or at least I failed to find such text). Do you think such text should be added?
Note that there is such text regarding vendor-id.

From: DiME [mailto:dime-bounces@ietf.org] On Behalf Of Bertz, Lyle T [CTO]
Sent: Monday, July 17, 2017 6:04 PM
To: lionel.morand@orange.com; dime@ietf.org list
Subject: Re: [Dime] RFC 6733 Commands


agreed, we have encountered some folks tying the ACR/ACA to app id 0 in open source.





________________________________
From: lionel.morand@orange.com<mailto:lionel.morand@orange.com> <lionel.morand@orange.com<mailto:lionel.morand@orange.com>>
Sent: Monday, July 17, 2017 9:32 AM
To: Bertz, Lyle T [CTO]; dime@ietf.org<mailto:dime@ietf.org> list
Subject: RE: RFC 6733 Commands

Hi Lyle,

I think that there is no specific reason. By definition, the command is independent of any application. So when describing the command code, it may or may not be contained in the command code header. It is consistent with the CCF specification:

   header           = "<Diameter-Header:" command-id
                         [r-bit] [p-bit] [e-bit] [application-id]">"

The CCF is mainly used to identify the set of AVP that can be present in the command.

Regards,

Lionel

De : DiME [mailto:dime-bounces@ietf.org] De la part de Bertz, Lyle T [CTO]
Envoyé : lundi 17 juillet 2017 12:12
À : dime@ietf.org<mailto:dime@ietf.org> list
Objet : [Dime] RFC 6733 Commands


In the spec was there a particular reason why we did not specify the application Identifier in the header for each of the command codes, e.g. ACR/ACA assigned to application ID 3?



Lyle

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