backend: fix root zone usage
properly concatenate labels by using dnsutil.Join instead of '+'
Fixes:
@@ -422,7 +422,7 @@ func NS(ctx context.Context, b ServiceBackend, zone string, state request.Reques
old := state.QName()
state.Clear()
- state.Req.Question[0].Name = "ns.dns." + zone
+ state.Req.Question[0].Name = dnsutil.Join("ns.dns.", zone)
services, err := b.Services(ctx, state, false, opt)
if err != nil {
return nil, nil, err
@@ -462,12 +462,8 @@ func SOA(ctx context.Context, b ServiceBackend, zone string, state request.Reque
header := dns.RR_Header{Name: zone, Rrtype: dns.TypeSOA, Ttl: ttl, Class: dns.ClassINET}
- Mbox := hostmaster + "."
- Ns := "ns.dns."
- if zone[0] != '.' {
- Mbox += zone
- Ns += zone
- }
+ Mbox := dnsutil.Join(hostmaster, zone)
+ Ns := dnsutil.Join("ns.dns", zone)
soa := &dns.SOA{Hdr: header,
Mbox: Mbox,
