Re: [PATCH v2 2/3] conf: Split the notions of read DNS addresses and offered ones

[Stefano Brivio <sbrivio@redhat.com>]

On Thu,  3 Nov 2022 07:33:40 +0100
Stefano Brivio <sbrivio@redhat.com> wrote:

> With --dns-forward, if the host has a loopback address configured as
> DNS server, we should actually use it to forward queries, but, if
> --no-map-gw is passed, we shouldn't offer the same address via DHCP,
> NDP and DHCPv6, because it's not going to be reachable.
> 
> Problematic configuration:
> 
> * systemd-resolved configuring the usual 127.0.0.53 on the host: we
>   read that from /etc/resolv.conf
> 
> * --dns-forward specified with an unrelated address, for example
>   198.51.100.1
> 
> We still want to forward queries to 127.0.0.53, if we receive one
> directed to 198.51.100.1, so we can't drop 127.0.0.53 from our list:
> we want to use it for forwarding. At the same time, we shouldn't
> offer 127.0.0.53 to the guest or container either.
> 
> With this change, I'm only covering the case of automatically
> configured DNS servers from /etc/resolv.conf. We could extend this to
> addresses configured with command-line options, but I don't really
> see a likely use case at this point.
> 
> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Oops, disregard this, I botched the rebase in conf.c.

-- 
Stefano