Re: [Doh] [Ext] a tad confused on response sizes
Stephane Bortzmeyer <bortzmeyer@nic.fr> Tue, 05 June 2018 15:13 UTC
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Date: Tue, 05 Jun 2018 17:13:36 +0200
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Andrew Sullivan <ajs@anvilwalrusden.com>
Cc: doh@ietf.org
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References: <20180605120510.GA29047@server.ds9a.nl> <CFEAAD6E-4F9D-4DB5-A362-21775D74F84A@icann.org> <alpine.DEB.2.11.1806051515510.1809@grey.csi.cam.ac.uk> <663E7B21-9107-4A2B-9DEB-E13475A4E5FF@icann.org> <20180605145029.GI3011@mx4.yitter.info>
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Subject: Re: [Doh] [Ext] a tad confused on response sizes
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On Tue, Jun 05, 2018 at 10:50:29AM -0400, Andrew Sullivan <ajs@anvilwalrusden.com> wrote a message of 17 lines which said: > Except that in DNS there's a clearly defined path for what to do > next, Clearly defined, but certainly not implemented everywhere. <vague>Many</vague> resolvers cannot retry over TCP. (At this time, 'DNSKEY renater.fr' cannot be retrieved with a typical EDNS buffer size. Try it.) > whereas I am equally mystified what a DNS API client is supposed to > do if it receives such a bit. The way I understand it, it is a local decision by the client. Give in for this data, or choose a better DoH server. I think that a DoH server returning truncated answers is legal (RFC-compliant) but bad and, as a client, I would prefer to switch to another one. Practically speaking, for the RFC, what do you suggest? Forbidding TC? Then, what would the client do if it still receives one? (The point of DoH is to use DNS wire format, so a client has to be ready for anything which is legal DNS.)
- Re: [Doh] [Ext] a tad confused on response sizes Star Brilliant
- Re: [Doh] [Ext] a tad confused on response sizes Andrew Sullivan
- Re: [Doh] [Ext] a tad confused on response sizes Patrick McManus
- Re: [Doh] [Ext] a tad confused on response sizes Massimiliano Fantuzzi
- Re: [Doh] [Ext] a tad confused on response sizes Ray Bellis
- [Doh] a tad confused on response sizes bert hubert
- Re: [Doh] a tad confused on response sizes Dave Lawrence
- Re: [Doh] [Ext] a tad confused on response sizes Paul Hoffman
- Re: [Doh] a tad confused on response sizes Tony Finch
- Re: [Doh] [Ext] a tad confused on response sizes Tony Finch
- Re: [Doh] [Ext] a tad confused on response sizes Paul Hoffman
- Re: [Doh] [Ext] a tad confused on response sizes Andrew Sullivan
- Re: [Doh] [Ext] a tad confused on response sizes Tony Finch
- Re: [Doh] [Ext] a tad confused on response sizes Stephane Bortzmeyer
- Re: [Doh] [Ext] a tad confused on response sizes Stephane Bortzmeyer
- Re: [Doh] [Ext] a tad confused on response sizes Tony Finch
- Re: [Doh] [Ext] a tad confused on response sizes Andrew Sullivan
- Re: [Doh] [Ext] a tad confused on response sizes Star Brilliant
- Re: [Doh] [Ext] a tad confused on response sizes Tony Finch
- Re: [Doh] [Ext] a tad confused on response sizes Paul Hoffman
- Re: [Doh] [Ext] a tad confused on response sizes Dave Lawrence
- Re: [Doh] [Ext] a tad confused on response sizes Dave Lawrence
- Re: [Doh] [Ext] a tad confused on response sizes Star Brilliant
- Re: [Doh] [Ext] a tad confused on response sizes Tony Finch
- Re: [Doh] [Ext] a tad confused on response sizes Tony Finch
- Re: [Doh] [Ext] a tad confused on response sizes Star Brilliant
- Re: [Doh] [Ext] a tad confused on response sizes Tony Finch
- Re: [Doh] [Ext] a tad confused on response sizes Paul Hoffman
- Re: [Doh] [Ext] a tad confused on response sizes Andrew Sullivan
- Re: [Doh] [Ext] a tad confused on response sizes Tony Finch