Re: [DNSOP] [Ext] I-D Action: draft-ietf-dnsop-svcb-https-05.txt

Ben Schwartz <bemasc@google.com> Mon, 24 May 2021 21:13 UTC

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From: Ben Schwartz <bemasc@google.com>
Date: Mon, 24 May 2021 17:13:38 -0400
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To: Dick Franks <rwfranks@gmail.com>
Cc: Paul Hoffman <paul.hoffman@icann.org>, WG <dnsop@ietf.org>
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Subject: Re: [DNSOP] [Ext] I-D Action: draft-ietf-dnsop-svcb-https-05.txt
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On Mon, May 24, 2021 at 3:46 PM Dick Franks <rwfranks@gmail.com> wrote:
...
>
> BIND, NSD, PowerDNS, and Net::DNS are well able to deal with escapes
> as described in RFC1035, all of them conspicuous counter-examples to
> any argument that special treatment of double escapes is an essential
> requirement.

I continue to believe that this draft is strictly within the RFC1035
escaping procedure, whereas you are proposing a change to RFC1035
escaping.

I previously mentioned NAPTR as an example of a record type that uses
multilayer escaping, and does not attempt to integrate
datatype-specific escaping rules into the char-string parser.  The URI
RR type is another example.  Thus, foo://example/%\ is rendered as
"foo://example/%25\\", and not as "foo://example/\%\\".