[ CCode ( array_length = false , array_null_terminated = true ) ]
[ NoAccessorMethod ]
[ Version ( since = "1.2" ) ]
public string[] dns_options { owned get; set; }
Array of DNS options to be added to resolv.
conf.
null means that the options are unset and left at the default. In this case NetworkManager will use default options. This is distinct from an empty list of properties.
The following options are directly added to resolv.conf: "attempts", "debug", "edns0", "inet6", "ip6-bytestring", "ip6-dotint", "ndots", "no-aaaa", "no-check-names", "no-ip6-dotint", "no-reload", "no-tld-query", "rotate", "single-request", "single-request-reopen", "timeout", "trust-ad", "use-vc". See the resolv.conf(5) man page for a detailed description of these options.
In addition, NetworkManager supports the special options "_no-add-edns0" and "_no-add-trust-ad". They are not added to resolv.conf, and can be used to prevent the automatic addition of options "edns0" and "trust-ad" when using caching DNS plugins (see below).
The "trust-ad" setting is only honored if the profile contributes name servers to resolv.conf, and if all contributing profiles have "trust-ad" enabled.
When using a caching DNS plugin (dnsmasq or systemd-resolved in NetworkManager.conf) then "edns0" and "trust-ad" are automatically added, unless "_no-add-edns0" and "_no-add-trust-ad" are present.