From f7c594af5aac0bd8fe44febde90851ebbbf2de58 Mon Sep 17 00:00:00 2001
From: cynic <cynic@mesh.kyun.li>
Date: Mon, 10 Jun 2024 04:09:00 +0000
Subject: [PATCH] generate proper response for missing A record

---
 pkg/meshname/server.go | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/pkg/meshname/server.go b/pkg/meshname/server.go
index cdd8112..5337bc2 100644
--- a/pkg/meshname/server.go
+++ b/pkg/meshname/server.go
@@ -162,13 +162,30 @@ func (s *MeshnameServer) handleMeshnameRequest(w dns.ResponseWriter, r *dns.Msg)
 func (s *MeshnameServer) handleMeshIPRequest(w dns.ResponseWriter, r *dns.Msg) {
 	m := new(dns.Msg)
 	m.SetReply(r)
-	s.log.Debugln(r.String())
+	m.Authoritative = true
 
 	for _, q := range r.Question {
 		labels := dns.SplitDomainName(q.Name)
+
+		// handle A type properly
+		if q.Qtype == dns.TypeA {
+			answer := new(dns.SOA)
+			answer.Hdr = dns.RR_Header{Name: q.Name, Rrtype: dns.TypeSOA, Class: dns.ClassINET, Ttl: 3600}
+			answer.Ns = "ns1.mesh.kyun.li."
+			answer.Mbox = "ns2.mesh.kyun.li."
+			answer.Serial = 2024061000
+			answer.Refresh = 1200
+			answer.Retry = 180
+			answer.Expire = 1209600
+			answer.Minttl = 600
+			 m.Ns = append(m.Ns, answer)
+			s.log.Debugln(m)
+			continue
+		}
+
 		// resolve only AAAA type
 		if q.Qtype != dns.TypeAAAA || q.Qclass != dns.ClassINET {
-			s.log.Debugln("Error: invalid resource requested")
+			//s.log.Debugln("Error: invalid resource requested")
 			continue
 		}
 
@@ -176,8 +193,8 @@ func (s *MeshnameServer) handleMeshIPRequest(w dns.ResponseWriter, r *dns.Msg) {
 			answer := new(dns.AAAA)
 			answer.Hdr = dns.RR_Header{Name: q.Name, Rrtype: dns.TypeAAAA, Class: dns.ClassINET, Ttl: 3600}
 			answer.AAAA = resolvedAddr
-
 			m.Answer = append(m.Answer, answer)
+			s.log.Debugln(m)
 		} else {
 			s.log.Debugln(err)
 		}