[Bug 270920] drill: "Error creating socket" with link-local IPv6 nameserver in /etc/resolv.conf

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From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 18 Apr 2023 20:43:56 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270920

            Bug ID: 270920
           Summary: drill: "Error creating socket" with link-local IPv6
                    nameserver in /etc/resolv.conf
           Product: Base System
           Version: 13.2-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: me@svmhdvn.name

`drill` isn't able to use a link-local IPv6 (e.g. specified as fe80::abcd%re0)
nameserver specified in /etc/resolv.conf, but `ping` is able to resolve DNS
just fine.

in /etc/resolv.conf:
nameserver fe80::abcd%re0

$ drill google.ca
Error: error sending query: Error creating socket

$ ping google.ca
[...]
16 bytes from [...]
# indicating success

When switching the nameserver IP from a link-local to a global IPv6 on the same
interface, `drill` works just fine.

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