add keepAlive option for udp Listener

2022-04-03 22:23:27 +08:00
parent fc1e6e8ff2
commit 6340d5198f
9 changed files with 109 additions and 79 deletions
--- a/resolver/exchanger/exchanger.go
+++ b/resolver/exchanger/exchanger.go
@ -197,7 +197,10 @@ func (ex *exchanger) exchange(ctx context.Context, msg []byte) ([]byte, error) {
 		c = tls.Client(c, ex.options.tlsConfig)
 	}

-	conn := &dns.Conn{Conn: c}
+	conn := &dns.Conn{
+		UDPSize: 1024,
+		Conn:    c,
+	}

 	if _, err = conn.Write(msg); err != nil {
 		return nil, err