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Re: [Doh] No truncation for DNS over HTTPS

Tony Finch <dot@dotat.at> Thu, 22 March 2018 13:05 UTC

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Date: Thu, 22 Mar 2018 13:05:18 +0000
From: Tony Finch <dot@dotat.at>
To: Davey Song <songlinjian@gmail.com>
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Subject: Re: [Doh] No truncation for DNS over HTTPS
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Davey Song <songlinjian@gmail.com> wrote:
>
> Although the dns-udpwireformat MIME type was defined, the dns wireformat
> data should not be treated as a datagram encapsulted in a HTTPs header but
> a new byte stream over HTTPs (similar with DNS TCP usage). No truncation
> loop is needed. Peopole may take it for granted, but It should be
> explicitely mentioned in this draft.

Agreed.

The implementation I would like (when DOH is implemented by a proxy in
front of an old-transport DNS server) has a pool of TCP connections from
the proxy to the back-end DNS server(s), over which incoming requests can
be multiplexed.

Tony.
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