This improves the user experience in many ways:
- Help user understand if DNSSEC is being used on the current DNS server in case
'allow-fallback' is supported.
- Nudges the user to explore enabling DNS-over-TLS and DNSSEC.
- Help user understand how global vs. link specific configuration works. Help
user understand if a global DNS is being used.
- Show the list of fallback DNS servers being used (as this poses privacy
concerns).
Also helps with debugging in problematic situations:
- Find out which DNS server is being used (and leading to problems) and show the
cycling mechanism.
Tests:
- Enable/disable fallback DNS server in privacy app. See that fallback servers
line is only shown when enabled.
- Set various global values of DNS-over-TLS and DNSSEC and see the status
changes.
- Set various values of DNS-over-TLS in the network connection settings and see
the changes in status.
- Set DNSSEC to allow-fallback. Perform a query and see that the value of
supported/unsupported changes.
- Set DNS servers with special configuration file in
/etc/systemd/resolved.conf.d/test.conf and restart systemd-resolved. See change
in status page. Notice that if connection specific DNS server is set to an
invalid server, global section has a current DNS server.
- Set SNI domain name and port for the an IPv4 DNS and an IPv6 DNS. See that the
display is as expected.
- Raise an exception in get_status() and notice that an error alert is show
properly.
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewd-by: Veiko Aasa <veiko17@disroot.org>
