[Doh] AXFR as several messages Re: [Ext] DNS Camel thoughts: TC and message size
bert hubert <bert.hubert@powerdns.com> Fri, 08 June 2018 10:34 UTC
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Date: Fri, 08 Jun 2018 12:33:55 +0200
From: bert hubert <bert.hubert@powerdns.com>
To: Ray Bellis <ray@bellis.me.uk>
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References: <alpine.DEB.2.11.1806061501340.10764@grey.csi.cam.ac.uk> <F5774061-35B9-477F-ADDA-8BB3472F30EF@icann.org> <CAOdDvNq9g3ghbg9fkfhP+ZA4-6E5oDNFCGo6NN9bydqUX76cLA@mail.gmail.com> <20180607093647.GB32326@server.ds9a.nl> <CAOdDvNriZDjU9yqUQjqN4fO84ENPWO3si-QePiKRgt+7VJVK0g@mail.gmail.com> <23321.27027.73356.94056@gro.dd.org> <CAOdDvNr=kLHPCtCHRx4=rpA1oDogQqdAJ0nR156BWABiFP_bzA@mail.gmail.com> <20180607215851.GA32738@server.ds9a.nl> <CAOdDvNqNpZ8fKPCO5sEqjROBHjg4wx-GGPMYSSynode10jeC0Q@mail.gmail.com> <4d37f79d-df25-7b23-eca3-fb9a69f0d1e2@bellis.me.uk>
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Subject: [Doh] AXFR as several messages Re: [Ext] DNS Camel thoughts: TC and message size
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On Fri, Jun 08, 2018 at 11:27:17AM +0100, Ray Bellis wrote: > I can allocate a buffer of 64kB, even on the stack, safe in the > knowledge that it's "big enough". It's a trivial amount of RAM by > today's standards but it avoids a lot of dynamic buffer allocation > and/or re-sizing. Indeed. Another question is also, if 65kB is too small, what is a reasonable limit, in other words, what can protocol users count on? Several megabytes? I would expect people arguing for larger messages to come up with a value they can defend. > I would be OK with special case treatment for AXFR in DOH, but *please* > don't mess with the normal message size constraints for standard queries. So interestingly enough, AXFR already consists of a series of DNS messages. A DNS message does not actually need an envelope (as in TCP) since it knows where it ends. So to do AXFR over DOH, simply return multiple DNS messages concatenated. Interestingly this would make it very easy for existing authoritative servers to support DOH for AXFR since this is exactly what they do already, without the need for protocol action. Bert (Oddly enough DNS over TCP could have been done without length fields, but this was likely easier on the system calls. )
- Re: [Doh] Are we missing an architecture? (was Re… Patrick McManus
- Re: [Doh] [Ext] Are we missing an architecture? (… Paul Hoffman
- Re: [Doh] [Ext] Are we missing an architecture? (… Mukund Sivaraman
- Re: [Doh] [Ext] Are we missing an architecture? (… Puneet Sood
- Re: [Doh] [Ext] Are we missing an architecture? (… Paul Hoffman
- Re: [Doh] [Ext] Are we missing an architecture? (… Ted Lemon
- Re: [Doh] [Ext] Are we missing an architecture? (… Ted Lemon
- Re: [Doh] [Ext] Are we missing an architecture? (… Paul Hoffman
- Re: [Doh] [Ext] Are we missing an architecture? (… Ted Lemon
- Re: [Doh] [Ext] Are we missing an architecture? (… Paul Hoffman
- Re: [Doh] [Ext] Are we missing an architecture? (… Mateusz Jończyk
- Re: [Doh] [Ext] Are we missing an architecture? (… Paul Hoffman
- Re: [Doh] [Ext] Are we missing an architecture? (… Sara Dickinson
- Re: [Doh] [Ext] Are we missing an architecture? (… Daniel Stenberg
- Re: [Doh] [Ext] Are we missing an architecture? (… Sara Dickinson
- Re: [Doh] [Ext] Are we missing an architecture? (… Daniel Stenberg
- Re: [Doh] [Ext] Are we missing an architecture? (… Mukund Sivaraman
- Re: [Doh] [Ext] Are we missing an architecture? (… Mukund Sivaraman
- Re: [Doh] [Ext] Are we missing an architecture? (… Ray Bellis
- Re: [Doh] [Ext] Are we missing an architecture? (… Patrick McManus
- Re: [Doh] [Ext] Are we missing an architecture? (… Mukund Sivaraman
- Re: [Doh] [Ext] Are we missing an architecture? (… Ben Schwartz
- Re: [Doh] [Ext] Are we missing an architecture? (… Mukund Sivaraman
- Re: [Doh] [Ext] Are we missing an architecture? (… Mukund Sivaraman
- Re: [Doh] [Ext] Are we missing an architecture? (… Ben Schwartz
- Re: [Doh] [Ext] Are we missing an architecture? (… Petr Špaček
- Re: [Doh] [Ext] Are we missing an architecture? (… Ray Bellis
- Re: [Doh] [Ext] Are we missing an architecture? (… bert hubert
- Re: [Doh] [Ext] Are we missing an architecture? (… Ray Bellis
- Re: [Doh] [Ext] Are we missing an architecture? (… Dave Lawrence
- Re: [Doh] [Ext] Are we missing an architecture? (… Dave Lawrence
- Re: [Doh] [Ext] Are we missing an architecture? (… Paul Hoffman
- Re: [Doh] [Ext] Are we missing an architecture? (… Tom Pusateri
- [Doh] DNS Camel thoughts: TC and message size bert hubert
- Re: [Doh] DNS Camel thoughts: TC and message size Petr Špaček
- Re: [Doh] DNS Camel thoughts: TC and message size Tony Finch
- Re: [Doh] DNS Camel thoughts: TC and message size Hewitt, Rory
- Re: [Doh] DNS Camel thoughts: TC and message size Benno Overeinder
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Andrew Sullivan
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Andrew Sullivan
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… George Michaelson
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Paul Hoffman
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Patrick McManus
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Tony Finch
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… bert hubert
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Paul Hoffman
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Martin J. Dürst
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Patrick McManus
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Paul Hoffman
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Tony Finch
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Patrick McManus
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Ray Bellis
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Ray Bellis
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… bert hubert
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Andrew Sullivan
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Robert Edmonds
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Mateusz Jończyk
- [Doh] AXFR as several messages Re: [Ext] DNS Came… bert hubert
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… John Dickinson
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Ray Bellis
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Mukund Sivaraman
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Mukund Sivaraman
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Patrick McManus
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Tony Finch
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Martin Thomson
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Mark Nottingham
- [Doh] DNS Camel thoughts: TC and message size Patrick McManus
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Ólafur Guðmundsson
- [Doh] Are we missing an architecture? (was Re: DN… Andrew Sullivan
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Andrew Sullivan
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… bert hubert
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Patrick McManus
- Re: [Doh] Are we missing an architecture? (was Re… Mark Nottingham
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Mukund Sivaraman
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] Are we missing an architecture? (was Re… Andrew Sullivan
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Andrew Sullivan
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Patrick McManus
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Andrew Sullivan
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Patrick McManus
- Re: [Doh] [Ext] DNS Camel thoughts: TC and messag… Dave Lawrence
- Re: [Doh] Are we missing an architecture? (was Re… Dave Lawrence
- Re: [Doh] Are we missing an architecture? (was Re… bert hubert
- Re: [Doh] Are we missing an architecture? (was Re… Dave Lawrence
- Re: [Doh] [Ext] Are we missing an architecture? (… Ray Bellis