Muhammad Nuzaihan Bin Kamal Luddin 81ae2237c1 resolve: add an option to explicitly disable query AAAA, SRV, MX, etc... (#34165) ...

Based on this patch i had submitted to RedHat
(https://issues.redhat.com/browse/RHEL-56280), i am submitting this
patch to this upstream systemd.

There is no way to explicitly enable/disable IPv6 AAAA queries.

Problem was that i am using RHEL9 and some applications does not use a
newer glibc that supports `no-aaaa` option in `/etc/resolv.conf`. So
some applications will still resolve IPv6 AAAA even with `no-aaaa`
option and it is inconsistent across the system where some work and some
don't.

So this systemd-resolved patch catch-all queries and disable IPv6 AAAA
queries for all applications in the OS by having an option
`RefuseRecordTypes=AAAA` to disable IPv6 AAAA queries.

Although https://github.com/systemd/systemd/pull/28136 tries to fix this
automatically but it still does not work with
`net.ipv6.conf.all.disable_ipv6 = 1`. Also tried with explicitly
removing the conditional and force set `family = AF_INET` and still
resolves AAAA records.

The issue is that i want to explicitly disable IPv6 AAAA queries instead
of systemd-resolved to figure out itself which address family it is
using, which always have problems.

2025-02-11 18:29:39 +09:00

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