From 6fedd7ec844e58a5cc95f4146134cccdf45201bc Mon Sep 17 00:00:00 2001
From: Dreamacro <8615343+Dreamacro@users.noreply.github.com>
Date: Mon, 4 Jan 2021 00:51:53 +0800
Subject: [PATCH] Fix: dns client should not bind local address

---
 dns/client.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dns/client.go b/dns/client.go
index a40888dddf..151bee24a0 100644
--- a/dns/client.go
+++ b/dns/client.go
@@ -39,7 +39,7 @@ func (c *client) ExchangeContext(ctx context.Context, m *D.Msg) (msg *D.Msg, err
 		return nil, err
 	}
 
-	if dialer.DialHook != nil {
+	if ip != nil && ip.IsGlobalUnicast() && dialer.DialHook != nil {
 		network := "udp"
 		if strings.HasPrefix(c.Client.Net, "tcp") {
 			network = "tcp"