Fix the IsSubDomain issue

ex/fksd/serve.go

@@ -20,13 +20,16 @@ func serve(w dns.ResponseWriter, req *dns.Msg, z *dns.Zone) {
 	if z == nil {
 		panic("fksd: no zone")
 	}
-	//logPrintf("[zone %s] incoming %s %s %d from %s\n", z.Origin, req.Question[0].Name, dns.Rr_str[req.Question[0].Qtype], req.MsgHdr.Id, w.RemoteAddr())
+	logPrintf("[zone %s] incoming %s %s %d from %s\n", z.Origin, req.Question[0].Name, dns.Rr_str[req.Question[0].Qtype], req.MsgHdr.Id, w.RemoteAddr())
 	// Ds Handling
 	// Referral
 	// if we find something with NonAuth = true, it means
 	// we need to return referral
 	nss := z.Predecessor(req.Question[0].Name)
 	m := new(dns.Msg)
+	if nss != nil {
+		println("found", nss.RR[dns.TypeNS][0].String())
+	}
 	if nss != nil && nss.NonAuth {
 		m.SetReply(req)
 		m.Ns = nss.RR[dns.TypeNS]
@@ -98,6 +101,9 @@ func serve(w dns.ResponseWriter, req *dns.Msg, z *dns.Zone) {
 		return
 	} else { // NoData reply or CNAME
 		m.SetReply(req)
+		if cname, ok := node.RR[dns.TypeCNAME]; ok {
+			m.Answer = cname // tODO
+		}
 		m.Ns = apex.RR[dns.TypeSOA]
 		ednsFromRequest(req, m)
 		w.Write(m)

ex/fksd/zone.go

@@ -14,7 +14,9 @@ func (c *Config) ReadZoneFile(origin, file string) error {
 	z := dns.NewZone(origin)
 	for rr := range dns.ParseZone(f, origin, file) {
 		if rr.Error == nil {
-			z.Insert(rr.RR)
+			if e := z.Insert(rr.RR); e != nil {
+				logPrintf("failed to insert record: %s\n", e.Error())
+			}
 		} else {
 			logPrintf("failed to parse: %s\n", rr.Error.Error())
 		}

zone.go

@@ -52,7 +52,7 @@ func NewZone(origin string) *Zone {
 
 // Insert inserts an RR into the zone. Duplicate data overwrites the old data.
 func (z *Zone) Insert(r RR) error {
-	if !IsSubDomain(r.Header().Name, z.Origin) {
+	if !IsSubDomain(z.Origin, r.Header().Name) {
 		return &Error{Err: "out of zone data", Name: r.Header().Name}
 	}