From a23b66f7213b855f362e64201c71d10c3455eabb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Sat, 17 Jan 2026 18:16:51 +0800
Subject: [PATCH] Skip strict routing on Windows versions below 10

---
 tun_windows.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tun_windows.go b/tun_windows.go
index 60c43e3..54e7395 100644
--- a/tun_windows.go
+++ b/tun_windows.go
@@ -184,6 +184,13 @@ func (t *NativeTun) Start() error {
 		return err
 	}
 	if t.options.StrictRoute {
+		major, _, _ := windows.RtlGetNtVersionNumbers()
+		if major < 10 {
+			if t.options.Logger != nil {
+				t.options.Logger.Warn("strict routing is not supported on Windows versions below 10")
+			}
+			return nil
+		}
 		var engine uintptr
 		session := &winsys.FWPM_SESSION0{Flags: winsys.FWPM_SESSION_FLAG_DYNAMIC}
 		err := winsys.FwpmEngineOpen0(nil, winsys.RPC_C_AUTHN_DEFAULT, nil, session, unsafe.Pointer(&engine))