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Re: [dnsext] Fwd: New Version Notification for draft-bellis-dnsext-multi-qtypes-01.txt

Ray Bellis <Ray.Bellis@nominet.org.uk> Tue, 27 March 2012 11:51 UTC

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From: Ray Bellis <Ray.Bellis@nominet.org.uk>
To: Dick Franks <rwfranks@acm.org>
Thread-Topic: [dnsext] Fwd: New Version Notification for draft-bellis-dnsext-multi-qtypes-01.txt
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Date: Tue, 27 Mar 2012 11:51:47 +0000
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Subject: Re: [dnsext] Fwd: New Version Notification for draft-bellis-dnsext-multi-qtypes-01.txt
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On 27 Mar 2012, at 13:29, Dick Franks wrote:

> Ray,
> 
> IMHO data format is horribly overcomplicated.
> 
> 
> [3.1] redundant OPTION-DATA content
> Redundant: packet direction determined by QR flag in packet header.

Not at all, per the text the intention of the QTD bit is to distinguish between a server which correctly parsed the option, and one that simply echoed it.
 
>    QTCOUNT: a 3 bit field with range 0 .. 7 specifying the number of QT
>    fields to follow.
> Redundant: easily calculated from OPTION-LENGTH.

That may be fair - it's a year since I wrote the draft so I need to recall what the rationale was for not relying on the OPTION LENGTH.

kind regards,

Ray

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