From e54f9dd206a5f17680b6eff56d2e5936573cf023 Mon Sep 17 00:00:00 2001
From: NODA Kai <nodakai@gmail.com>
Date: Tue, 30 Apr 2024 21:56:57 +0800
Subject: [PATCH] dns_server.go: parseQuery: set NXDOMAIN if there's no Answer
 to return (#845)

---
 dns_server.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dns_server.go b/dns_server.go
index 70ec0e0..4ba2075 100644
--- a/dns_server.go
+++ b/dns_server.go
@@ -96,6 +96,10 @@ func parseQuery(l *logrus.Logger, m *dns.Msg, w dns.ResponseWriter) {
 			}
 		}
 	}
+
+	if len(m.Answer) == 0 {
+		m.Rcode = dns.RcodeNameError
+	}
 }
 
 func handleDnsRequest(l *logrus.Logger, w dns.ResponseWriter, r *dns.Msg) {