package headscale import ( "fmt" "tailscale.com/util/dnsname" ) func (h *Headscale) generateMagicDNSRootDomains() (*[]dnsname.FQDN, error) { base, err := dnsname.ToFQDN(h.cfg.BaseDomain) if err != nil { return nil, err } // TODO(juanfont): we are not handing out IPv6 addresses yet // and in fact this is Tailscale.com's range (note the fd7a:115c:a1e0: range in the fc00::/7 network) ipv6base := dnsname.FQDN("0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa.") fqdns := []dnsname.FQDN{base, ipv6base} // TODO(juanfont): This only works for the 100.64.0.0/10 range. for i := 64; i <= 127; i++ { fqdn, err := dnsname.ToFQDN(fmt.Sprintf("%d.100.in-addr.arpa.", i)) if err != nil { continue } fqdns = append(fqdns, fqdn) } return &fqdns, nil }