From 5c995d97f43e8e97ee0cb3d1aa12450d3968c8d2 Mon Sep 17 00:00:00 2001
From: AkinoKaede <i@akinokae.de>
Date: Sun, 2 Jul 2023 09:47:33 +0800
Subject: [PATCH] fix: panic in dns over quic when address is a ip

---
 app/dns/nameserver_quic.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/app/dns/nameserver_quic.go b/app/dns/nameserver_quic.go
index c63b9a669..28e692257 100644
--- a/app/dns/nameserver_quic.go
+++ b/app/dns/nameserver_quic.go
@@ -378,7 +378,16 @@ func (s *QUICNameServer) getConnection(ctx context.Context) (quic.Connection, er
 
 func (s *QUICNameServer) openConnection(ctx context.Context) (quic.Connection, error) {
 	tlsConfig := tls.Config{
-		ServerName: s.destination.Address.Domain(),
+		ServerName: func() string {
+			switch s.destination.Address.Family() {
+			case net.AddressFamilyIPv4, net.AddressFamilyIPv6:
+				return s.destination.Address.IP().String()
+			case net.AddressFamilyDomain:
+				return s.destination.Address.Domain()
+			default:
+				panic("unknown address family")
+			}
+		}(),
 	}
 	quicConfig := &quic.Config{
 		HandshakeIdleTimeout: handshakeIdleTimeout,