Re: [DNSOP] [Ext] Re: draft-ietf-dnsop-extended-error and combinations of EDEs and RCODEs

Vittorio Bertola <vittorio.bertola@open-xchange.com> Thu, 12 September 2019 16:42 UTC

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Date: Thu, 12 Sep 2019 18:42:28 +0200 (CEST)
From: Vittorio Bertola <vittorio.bertola@open-xchange.com>
Reply-To: Vittorio Bertola <vittorio.bertola@open-xchange.com>
To: Paul Hoffman <paul.hoffman@icann.org>, Wes Hardaker <wjhns1@hardakers.net>
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Subject: Re: [DNSOP] [Ext] Re: draft-ietf-dnsop-extended-error and combinations of EDEs and RCODEs
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> Il 12 settembre 2019 16:52 Paul Hoffman <paul.hoffman@icann.org> ha scritto:
> 
> Proposal: add the following sentence to the end of the abstract: "Extended error information does not change the processing of RCODEs."
> 
> Proposal: add to the end of the Introduction: Applications MUST NOT change the processing of RCODEs in messages based on extended error codes.

But isn't the foremost motivation of this document to allow the client to tell between SERVFAIL due to DNSSEC validation failure and SERVFAIL due to resolver issues, and try another resolver in the latter case but not in the former? How would this not be "changing the processing of RCODEs in messages based on extended error codes"?

Or do you mean that the stub resolver library can do that, but not the application that is calling it? But what do you do when the two things are in fact the same, e.g. with DoH clients?

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Vittorio Bertola | Head of Policy & Innovation, Open-Xchange
vittorio.bertola@open-xchange.com 
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