From 390a48357c32da55f23662160ca7b720698b547b Mon Sep 17 00:00:00 2001
From: xqzr <34030394+xqzr@users.noreply.github.com>
Date: Sat, 29 Mar 2025 20:29:39 +0800
Subject: [PATCH 1/2] Try Fix sockopt `Interface` miss multicast on Windows

---
 transport/internet/sockopt_windows.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/transport/internet/sockopt_windows.go b/transport/internet/sockopt_windows.go
index fa45011d2f1d..b76b4a070987 100644
--- a/transport/internet/sockopt_windows.go
+++ b/transport/internet/sockopt_windows.go
@@ -13,6 +13,8 @@ const (
 	TCP_FASTOPEN    = 15
 	IP_UNICAST_IF   = 31
 	IPV6_UNICAST_IF = 31
+	IPV6_MULTICAST_IF = 9
+	IP_MULTICAST_IF = 9
 )
 
 func setTFO(fd syscall.Handle, tfo int) error {
@@ -41,10 +43,16 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IP, IP_UNICAST_IF, int(idx)); err != nil {
 				return errors.New("failed to set IP_UNICAST_IF").Base(err)
 			}
+			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IP, IP_MULTICAST_IF, int(idx)); err != nil {
+				return errors.New("failed to set IP_MULTICAST_IF").Base(err)
+			}
 		} else {
 			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IPV6, IPV6_UNICAST_IF, inf.Index); err != nil {
 				return errors.New("failed to set IPV6_UNICAST_IF").Base(err)
 			}
+			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IPV6, IPV6_MULTICAST_IF, inf.Index); err != nil {
+				return errors.New("failed to set IPV6_MULTICAST_IF").Base(err)
+			}
 		}
 	}
 

From 56ca90196da559f4c43b345848fa420b10a06ac3 Mon Sep 17 00:00:00 2001
From: xqzr <34030394+xqzr@users.noreply.github.com>
Date: Sun, 30 Mar 2025 23:23:21 +0800
Subject: [PATCH 2/2] 16 & 17L SW

---
 transport/internet/sockopt_windows.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/transport/internet/sockopt_windows.go b/transport/internet/sockopt_windows.go
index b76b4a070987..e1c1d25e3f06 100644
--- a/transport/internet/sockopt_windows.go
+++ b/transport/internet/sockopt_windows.go
@@ -13,8 +13,8 @@ const (
 	TCP_FASTOPEN    = 15
 	IP_UNICAST_IF   = 31
 	IPV6_UNICAST_IF = 31
-	IPV6_MULTICAST_IF = 9
 	IP_MULTICAST_IF = 9
+	IPV6_MULTICAST_IF = 9
 )
 
 func setTFO(fd syscall.Handle, tfo int) error {