From a8cb01e6df93ee6bb43760fa7c08f399f5e039de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Tue, 9 Sep 2025 14:48:31 +0800
Subject: [PATCH] Prevent panic when wintun dll fails to load

---
 internal/wintun/wintun_windows.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/internal/wintun/wintun_windows.go b/internal/wintun/wintun_windows.go
index a817e6c..288d364 100644
--- a/internal/wintun/wintun_windows.go
+++ b/internal/wintun/wintun_windows.go
@@ -39,6 +39,10 @@ func closeAdapter(wintun *Adapter) {
 // deterministically. If it is set to nil, the GUID is chosen by the system at random,
 // and hence a new NLA entry is created for each new adapter.
 func CreateAdapter(name string, tunnelType string, requestedGUID *windows.GUID) (wintun *Adapter, err error) {
+	err = procWintunCloseAdapter.Find()
+	if err != nil {
+		return
+	}
 	var name16 *uint16
 	name16, err = windows.UTF16PtrFromString(name)
 	if err != nil {