From 52a2c636825e35e2110b1bd575fddd6ac28ec014 Mon Sep 17 00:00:00 2001
From: xqzr <34030394+xqzr@users.noreply.github.com>
Date: Mon, 31 Mar 2025 04:51:36 +0800
Subject: [PATCH] Sockopt: Fix Windows Multicast `interface` bind (#4568)
https://github.com/XTLS/Xray-core/pull/4568#issuecomment-2763492336
---
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 fa45011d..e1c1d25e 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
+ IP_MULTICAST_IF = 9
+ IPV6_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)
+ }
}
}