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

Dick Franks <rwfranks@acm.org> Tue, 27 March 2012 11:29 UTC

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From: Dick Franks <rwfranks@acm.org>
Date: Tue, 27 Mar 2012 12:29:06 +0100
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To: Ray Bellis <Ray.Bellis@nominet.org.uk>
Cc: DNSEXT Working Group <dnsext@ietf.org>
Subject: Re: [dnsext] Fwd: New Version Notification for draft-bellis-dnsext-multi-qtypes-01.txt
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Ray,

IMHO data format is horribly overcomplicated.


[3.1] redundant OPTION-DATA content


 OPTION-DATA: Option specific, as below:

                    +0 (MSB)                            +1 (LSB)
       +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
    0: |QTD|   reserved    |  QTCOUNT  |           QT1 (MSB)           |
       +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
    2: |           QT1 (LSB)           |              ...              |
       +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
       |              ...             ///          QTn (MSB)           |
       +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
       |           QTn (LSB)           |
       +---+---+---+---+---+---+---+---+

   QTD: this bit indicates the direction of the packet.  It MUST be
   clear (0) in a query and set (1) in a response.


Redundant: packet direction determined by QR flag in packet header.


   QTCOUNT: a 3 bit field with range 0 .. 7 specifying the number of QT
   fields to follow.

Redundant: easily calculated from OPTION-LENGTH.


OPTION-DATA then becomes:

 OPTION-DATA: Option specific, as below:

                    +0 (MSB)                            +1 (LSB)
       +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
    0: |                             QTYPE1                            |
       +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
       |                              ...
       +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
       |                             QTYPEn                            |
       +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
   QTYPEn: a 2 octet field specifying a DNS RR type.  The RR type MUST
   be for a real resource record, and MUST NOT refer to a pseudo RR type
   such as "OPT", "IXFR", "TSIG", etc.




--Dick



On 27 March 2012 09:29, Ray Bellis <Ray.Bellis@nominet.org.uk> wrote:

>
> A new version of I-D, draft-bellis-dnsext-multi-qtypes-01.txt has been
> successfully submitted by Ray Bellis and posted to the IETF repository.
>
> Filename: draft-bellis-dnsext-multi-qtypes
> Revision: 01
> Title:  Title
> Creation date: 2012-03-27
> WG ID:  Individual Submission
> Number of pages: 7
>
> Abstract:
>   This document specifies a method for a DNS client to request
>   additional DNS record types to be delivered alongside the primary
>   record type specified in the question section of a DNS query.
>
>
> Following discussions on this topic on the DNSOP list a couple of weeks
> ago I decided I ought to post this previously unsubmitted draft for the
> record.
>
> https://datatracker.ietf.org/doc/draft-bellis-dnsext-multi-qtypes/
>
> There was (very briefly) a -00 of this posted this morning but I realised
> I had an incorrect reference in it.
>
> Ray
>
>
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> dnsext@ietf.org
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