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Re: [DNSOP] Fwd: New Version Notification for draft-sury-deprecate-obsolete-resource-records-00.txt

Tony Finch <dot@dotat.at> Mon, 26 March 2018 13:39 UTC

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Date: Mon, 26 Mar 2018 14:39:36 +0100
From: Tony Finch <dot@dotat.at>
To: Evan Hunt <each@isc.org>
cc: Ondřej Surý <ondrej@isc.org>, dnsop <dnsop@ietf.org>
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Subject: Re: [DNSOP] Fwd: New Version Notification for draft-sury-deprecate-obsolete-resource-records-00.txt
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Evan Hunt <each@isc.org> wrote:
>
> These RR types have text representations and wire format representations,
> which from a complexity standpoint seem quite harmless to implement.  There
> are the old annoying rules about name compression and sorting, which do add
> some complexity, but are already implemented in all the existing codebases.

There's the particularly special case of WKS which has weird collision
logic - RFC 2136 section 3.4.2.2. It's extra weird that this was specified
in 1997 when WKS was deprecated in 1989 - RFC 1101 and RFC 1123.

I fear that this will make it hard to delete WKS code because that may
introduce interop bugs if a new server bindly allows colliding WKS records
that an old server objects to.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/  -  I xn--zr8h punycode
Irish Sea: South 4, increasing 5 to 7, then veering west later. Slight or
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