diff options
Diffstat (limited to 'plugin/file/lookup.go')
| -rw-r--r-- | plugin/file/lookup.go | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/plugin/file/lookup.go b/plugin/file/lookup.go index 6eeb4c397..59c0927b5 100644 --- a/plugin/file/lookup.go +++ b/plugin/file/lookup.go @@ -115,8 +115,21 @@ func (z *Zone) Lookup(ctx context.Context, state request.Request, qname string) // Only one DNAME is allowed per name. We just pick the first one to synthesize from. dname := dnamerrs[0] if cname := synthesizeCNAME(state.Name(), dname.(*dns.DNAME)); cname != nil { - ctx = context.WithValue(ctx, dnsserver.LoopKey{}, loop+1) - answer, ns, extra, rcode := z.externalLookup(ctx, state, elem, []dns.RR{cname}) + var ( + answer, ns, extra []dns.RR + rcode Result + ) + + // We don't need to chase CNAME chain for synthesized CNAME + if qtype == dns.TypeCNAME { + answer = []dns.RR{cname} + ns = ap.ns(do) + extra = nil + rcode = Success + } else { + ctx = context.WithValue(ctx, dnsserver.LoopKey{}, loop+1) + answer, ns, extra, rcode = z.externalLookup(ctx, state, elem, []dns.RR{cname}) + } if do { sigs := elem.Type(dns.TypeRRSIG) @@ -203,7 +216,7 @@ func (z *Zone) Lookup(ctx context.Context, state request.Request, qname string) if wildElem != nil { auth := ap.ns(do) - if rrs := wildElem.TypeForWildcard(dns.TypeCNAME, qname); len(rrs) > 0 { + if rrs := wildElem.TypeForWildcard(dns.TypeCNAME, qname); len(rrs) > 0 && qtype != dns.TypeCNAME { ctx = context.WithValue(ctx, dnsserver.LoopKey{}, loop+1) return z.externalLookup(ctx, state, wildElem, rrs) } |