Re: [radext] Alissa Cooper's No Objection on draft-ietf-radext-coa-proxy-06: (with COMMENT)

Alissa Cooper <alissa@cooperw.in> Wed, 15 August 2018 20:11 UTC

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From: Alissa Cooper <alissa@cooperw.in>
In-Reply-To: <CFDEABD1-D6EB-4C04-AE28-2A3C5A86C74C@deployingradius.com>
Date: Wed, 15 Aug 2018 16:11:30 -0400
Cc: Eric Rescorla <ekr@rtfm.com>, Winter Stefan <stefan.winter@restena.lu>, radext@ietf.org, IESG <iesg@ietf.org>, draft-ietf-radext-coa-proxy@ietf.org, radext-chairs@ietf.org
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References: <153435801941.3053.15907114318025420750.idtracker@ietfa.amsl.com> <926C796E-1339-488F-812C-27A003DF1D27@deployingradius.com> <CABcZeBNo=D21YhcAKXFp0abO4NGoGPiog1p-+GyW+g_4BYbTgg@mail.gmail.com> <9BC9E9E6-1B18-4BA0-A8BF-CBA95954EBA2@deployingradius.com> <202C0FD8-8B63-4A14-92B9-299810EDAD19@cooperw.in> <CFDEABD1-D6EB-4C04-AE28-2A3C5A86C74C@deployingradius.com>
To: Alan DeKok <aland@deployingradius.com>
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Subject: Re: [radext] Alissa Cooper's No Objection on draft-ietf-radext-coa-proxy-06: (with COMMENT)
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> On Aug 15, 2018, at 4:05 PM, Alan DeKok <aland@deployingradius.com> wrote:
> 
> On Aug 15, 2018, at 4:02 PM, Alissa Cooper <alissa@cooperw.in> wrote:
>> 
>> Acknowledging my limited recall of how RADIUS attributes are defined, I think what is tripping me up is the definition of the Length field, which says “4 to 23.” If I assume that length is measured in octets, that the type field requires 1 octet, that the length field requires 1 octet, and that the value can be between 1 and 32 octets long, I would conclude that valid length values would be between 3 and 34, not between 4 and 23. Can you clarify why not?
> 
>  The Length of the attribute typically refers to allowed values of the Length field in the RADIUS attribute header.  That Length includes the octets of the header.
> 
>  In this case, 3.

Ok, I see you’ve agreed to fix this in another thread.

Thanks,
Alissa

> 
>> This is I guess the root of why I thought the octet diagram would help.
>> 
>> Alissa  
>> 
>>> 
>>> There is no need for the *contents* of the attribute to have any delimitation whatsoever.
>>> 
>>> Alan DeKok.
>