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backend: fix root zone usage (#4039)

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properly concatenate labels by using dnsutil.Join instead of '+'

Fixes: #3316

Signed-off-by: Miek Gieben <miek@miek.nl>
This commit is contained in:
Miek Gieben
2020-07-31 10:58:09 +02:00
committed by GitHub
parent f23171af5f
commit 975305732e
1 changed files with 3 additions and 7 deletions
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10
plugin/backend_lookup.go
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@@ -422,7 +422,7 @@ func NS(ctx context.Context, b ServiceBackend, zone string, state request.Reques
old := state.QName() old := state.QName()
state.Clear() 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) services, err := b.Services(ctx, state, false, opt)
if err != nil { if err != nil {
return nil, nil, err 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} header := dns.RR_Header{Name: zone, Rrtype: dns.TypeSOA, Ttl: ttl, Class: dns.ClassINET}
Mbox := hostmaster + "." Mbox := dnsutil.Join(hostmaster, zone)
Ns := "ns.dns." Ns := dnsutil.Join("ns.dns", zone)
if zone[0] != '.' {
Mbox += zone
Ns += zone
}
soa := &dns.SOA{Hdr: header, soa := &dns.SOA{Hdr: header,
Mbox: Mbox, Mbox: Mbox,