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

Dick Franks <rwfranks@acm.org> Mon, 26 March 2018 14:37 UTC

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From: Dick Franks <rwfranks@acm.org>
Date: Mon, 26 Mar 2018 15:36:22 +0100
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To: Tony Finch <dot@dotat.at>
Cc: Evan Hunt <each@isc.org>, 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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On 26 March 2018 at 14:39, Tony Finch <dot@dotat.at> wrote:

> 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.
>

Getting rid of extraneous weird logic is the primary objective.


> 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.
>

There are no compressible domain names in WKS.  RFC3597 unknown type
representation
does not change the meaning or otherwise damage the rdata.

Intermediate nameservers unaware of WKS, pass it along as as an unknown
type.

The end-points, if there still are any, are free to continue using WKS by
mutual agreement.



>
> Tony.
> --
> f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/  -  I xn--zr8h
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