New returns a new resolver.

WriteDNSResolver writes r to w.

WriteDNSResolvers writes resolvers to w.

WriteIPPorts writes vv to w.

WriteRoutes writes routes to w, omitting *.arpa routes and instead summarizing how many of them there were.

Config is a resolver configuration.

Resolver is a DNS resolver for nodes on the Tailscale network, associating them with domain names of the form <mynode>.<mydomain>.<root>.