From 88099ee72da9d343328df0918c09b5d3880989f9 Mon Sep 17 00:00:00 2001
From: Toby <tobyxdd@gmail.com>
Date: Sat, 13 Aug 2022 11:39:40 -0700
Subject: [PATCH] fix: resolve_preference should only assign each ip once

---
 pkg/transport/resolve.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/transport/resolve.go b/pkg/transport/resolve.go
index ca3cc3e..dc7c76e 100644
--- a/pkg/transport/resolve.go
+++ b/pkg/transport/resolve.go
@@ -39,9 +39,9 @@ func resolveIPAddrWithPreference(host string, pref ResolvePreference) (*net.IPAd
 	var ip4, ip6 *net.IPAddr
 	for i := range ips {
 		ip := &ips[i]
-		if ip.IP.To4() != nil {
+		if ip4 == nil && ip.IP.To4() != nil {
 			ip4 = ip
-		} else {
+		} else if ip6 == nil && ip.IP.To4() == nil {
 			ip6 = ip
 		}
 		if ip4 != nil && ip6 != nil {