Re: [Dime] [AAA-DOCTORS] Fwd: [Editorial Errata Reported] RFC6733 (4803)

[<[e-mail]>]

This errata report is correct on the inconsistency regarding the definition of the command header and AVP header and how they are used in the rest of the document in the ABNF description of commands and Grouped AVPs.

For commands, the header is defined as follow:

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

whereas "<Diameter Header:" is used when defining commands.

Same for Grouped AVP. It is defined as follow:

         header           = "<" "AVP-Header:" avpcode [vendor] ">"

whereas "<AVP Header:" is used when defining Grouped AVPs.

Considering that most (if not all) the ABNF descriptions have been copied from the commands and Grouped AVPs defined in the RFC3588 or RFC6733, I would be in favor to correct the specification by modifying the definition of the headers, i.e.

--> In section 3.2.  Command Code Format Specification

OLD:

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

NEW:

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


--> And in section 4.4

OLD:

         header           = "<" "AVP-Header:" avpcode [vendor] ">"

NEW:

         header           = "<" "AVP Header:" avpcode [vendor] ">"

*******************
There are other issues pointed out in this report.

For command-def  = "<" command-name ">" "::=" diameter-message, I would propose to simply correct the example as all the command definitions given in the document are following the command-def definition.
For the grouped-avp-def, I don't know what would be the best approach. We could follow the same approach and require the addition of "<>" but I don't know what would be the impacts on existing Grouped AVPs defined without.

Regards,

Lionel.


-------- Forwarded Message --------
Subject:

[Editorial Errata Reported] RFC6733 (4803)

Date:

Tue, 13 Sep 2016 14:42:13 -0700

From:

RFC Errata System <[e-mail]><mailto:[e-mail]>

To:

[e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>

CC:

[e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>, [e-mail]<mailto:[e-mail]>



The following errata report has been submitted for RFC6733,

"Diameter Base Protocol".



--------------------------------------

You may review the report below and at:

http://www.rfc-editor.org/errata_search.php?rfc=6733&eid=4803



--------------------------------------

Type: Editorial

Reported by: Holger Freyther <[e-mail]><mailto:[e-mail]>



Section: 3.2



Original Text

-------------

   Example-Request ::= < Diameter Header: 9999999, REQ, PXY >

                       { User-Name }

                    1* { Origin-Host }

                     * [ AVP ]







Corrected Text

--------------

   <Example-Request> ::= < Diameter-Header: 9999999, REQ, PXY >

                       { User-Name }

                    1* { Origin-Host }

                     * [ AVP ]







Notes

-----

I converted the BNF into a PetitParser parser in Smalltalk/Pharo and noticed that example and grammar do not match. The first issue is with the example following the grammar but most definitions do not follow the BNF so maybe it is best to update the BNF.



  header           = "<Diameter-Header:" command-id

                         [r-bit] [p-bit] [e-bit] [application-id]">"



But "Diameter-Header:" is not used throughout the text so maybe it is better to update the grammar to "Diameter Header:".





 command-def      = "<" command-name ">" "::=" diameter-message



but the example is not using <> for the command-name ("Example-Request"). For the grouped-avp-def application is sometimes used with "<" name ">" and sometimes just name.



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--------------------------------------

RFC6733 (draft-ietf-dime-rfc3588bis-33)

--------------------------------------

Title               : Diameter Base Protocol

Publication Date    : October 2012

Author(s)           : V. Fajardo, Ed., J. Arkko, J. Loughney, G. Zorn, Ed.

Category            : PROPOSED STANDARD

Source              : Diameter Maintenance and Extensions

Area                : Operations and Management

Stream              : IETF

Verifying Party     : IESG



.



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