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Re: [dmarc-ietf] DNS library queries for DKIM and DMARC records?

"Murray S. Kucherawy" <superuser@gmail.com> Thu, 11 April 2019 04:08 UTC

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From: "Murray S. Kucherawy" <superuser@gmail.com>
Date: Wed, 10 Apr 2019 21:08:31 -0700
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To: Dave Crocker <dcrocker@gmail.com>
Cc: IETF DMARC WG <dmarc@ietf.org>
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Subject: Re: [dmarc-ietf] DNS library queries for DKIM and DMARC records?
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On Wed, Apr 10, 2019 at 12:37 PM Dave Crocker <dcrocker@gmail.com> wrote:

> For the software you know about, how are queries to the DNS performed,
> to obtain the TXT records associated with DKIM and/or DMARC?
>

By default, libopendkim and libopendmarc use the standard C library
functions (i.e., res_*()) to do these queries and await replies.  The
specific functions are res_query() and res_nquery() depending on which
version of the library is available.

I believe both can be configured to use libunbound instead (certainly
libopendkim can).

-MSK

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