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Re: [DNSOP] Working Group Last Call for draft-ietf-dnsop-edns-chain-query

Ólafur Guðmundsson <olafur@cloudflare.com> Tue, 10 November 2015 01:38 UTC

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References: <5635CF1A.4030803@gmail.com> <alpine.LSU.2.00.1511091301260.25050@hermes-2.csi.cam.ac.uk> <A8A3F4DA-EE53-4BA4-9EF7-6DCB6120350B@vpnc.org> <alpine.LSU.2.00.1511091651330.25050@hermes-2.csi.cam.ac.uk> <20151109205232.GA42848@isc.org>
Date: Mon, 09 Nov 2015 17:36:46 -0800
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From: Ólafur Guðmundsson <olafur@cloudflare.com>
To: Evan Hunt <each@isc.org>
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Cc: Tony Finch <dot@dotat.at>, dnsop <dnsop@ietf.org>, Paul Hoffman <paul.hoffman@vpnc.org>
Subject: Re: [DNSOP] Working Group Last Call for draft-ietf-dnsop-edns-chain-query
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On Mon, Nov 9, 2015 at 12:52 PM, Evan Hunt <each@isc.org> wrote:

> On Mon, Nov 09, 2015 at 04:55:24PM +0000, Tony Finch wrote:
> > With the current DNS protocol, a stub resolver can get all the records it
> > needs to validate a response in 1RTT, by sending multiple concurrent
> > queries for all the possible delegation points in the QNAME.
>
> But has to retain state for all those active queries, which adds a fair
> bit of complexity.  I would expect it to be a lot more straightforward to
> code a stub validator using CHAIN.
>

In deep zones like the reverse zones the stub has no idea where the zone
cuts are thus
this idea is work reduction for the stub

Olafur

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