Extract makeDNSReply function

dns/main.go

@@ -9,16 +9,21 @@ import (
 
 var zone = new(weavedns.ZoneDb)
 
-func handleLocal(w dns.ResponseWriter, r *dns.Msg) {
+func makeDNSReply(r *dns.Msg, name string, addr net.IP) *dns.Msg {
 	m := new(dns.Msg)
 	m.SetReply(r)
+	hdr := dns.RR_Header{Name: name, Rrtype: dns.TypeA,
+		Class: dns.ClassINET, Ttl: 3600}
+	a := &dns.A{hdr, addr}
+	m.Answer = append(m.Answer, a)
+	return m
+}
+
+func handleLocal(w dns.ResponseWriter, r *dns.Msg) {
 	q := r.Question[0]
 	ip, err := zone.MatchLocal(q.Name)
 	if err == nil {
-		hdr := dns.RR_Header{Name: q.Name, Rrtype: dns.TypeA,
-			Class: dns.ClassINET, Ttl: 3600}
-		a := &dns.A{hdr, net.ParseIP(ip)}
-		m.Answer = append(m.Answer, a)
+		m := makeDNSReply(r, q.Name, net.ParseIP(ip))
 		w.WriteMsg(m)
 	} else {
 		log.Printf("Failed lookup for %s", q.Name)