From 4a163fde36c44a4d666a1917e223e292fa17655a Mon Sep 17 00:00:00 2001
From: cynic <cynic@mesh.kyun.li>
Date: Sun, 18 Aug 2024 18:30:59 +0000
Subject: [PATCH] fix bug caused by Google's attack on DNS infrastructure.

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

diff --git a/pkg/meshname/server.go b/pkg/meshname/server.go
index 34a898c..c46a12a 100644
--- a/pkg/meshname/server.go
+++ b/pkg/meshname/server.go
@@ -145,6 +145,9 @@ func (s *MeshnameServer) handleMeshnameRequest(w dns.ResponseWriter, r *dns.Msg)
 		rm := new(dns.Msg)
 		rm.RecursionDesired = true
 		rm.Question = questions
+		// always use lowercase internally among meshname instances
+		rm.Question[0].Name = strings.ToLower(rm.Question[0].Name)
+		s.log.Debugln(rm.Question[0].Name) // DEBUG
 		// add alternative port number
 		portNumbers := []string{"53"}
 		portNumbers = append([]string{s.acmePort}, portNumbers...)  // TODO: rename acmePort to alternativePort