From d07c908e5d40b12eb4d444fe1f8b7c15557add6a Mon Sep 17 00:00:00 2001
From: dyhkwong <50692134+dyhkwong@users.noreply.github.com>
Date: Sat, 28 Feb 2026 18:00:41 +0800
Subject: [PATCH] Fix IPv6 local DNS on Windows

---
 dns/transport/local/resolv_windows.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dns/transport/local/resolv_windows.go b/dns/transport/local/resolv_windows.go
index 76f758c62..04b8d4ef2 100644
--- a/dns/transport/local/resolv_windows.go
+++ b/dns/transport/local/resolv_windows.go
@@ -5,6 +5,7 @@ import (
 	"net"
 	"net/netip"
 	"os"
+	"strconv"
 	"syscall"
 	"time"
 	"unsafe"
@@ -63,6 +64,9 @@ func dnsReadConfig(ctx context.Context, _ string) *dnsConfig {
 					continue
 				}
 				dnsServerAddr = netip.AddrFrom16(sockaddr.Addr)
+				if sockaddr.ZoneId != 0 {
+					dnsServerAddr = dnsServerAddr.WithZone(strconv.FormatInt(int64(sockaddr.ZoneId), 10))
+				}
 			default:
 				// Unexpected type.
 				continue