1 files changed, 63 insertions, 0 deletions
diff --git a/manager/adaptercleanup.go b/manager/adaptercleanup.go
new file mode 100644
index 00000000..779e4b80
--- /dev/null
+++ b/manager/adaptercleanup.go
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package manager
+
+import (
+	"log"
+	"strings"
+
+	"golang.org/x/sys/windows"
+	"golang.org/x/sys/windows/svc"
+	"golang.org/x/sys/windows/svc/mgr"
+
+	"golang.zx2c4.com/wireguard/tun/wintun"
+	"golang.zx2c4.com/wireguard/windows/services"
+)
+
+const unnamedWintunInterface = "Local Area Connection"
+
+func cleanupStaleAdapters() {
+	defer printPanic()
+
+	m, err := mgr.Connect()
+	if err != nil {
+		return
+	}
+	defer m.Disconnect()
+
+	wintun.DeleteMatchingInterfaces(func(wintun *wintun.Wintun) bool {
+		interfaceName, err := wintun.InterfaceName()
+		if err != nil {
+			log.Printf("Removing Wintun interface %s because determining interface name failed: %v", wintun.GUID().String(), err)
+			return true
+		}
+		if strings.HasPrefix(interfaceName, unnamedWintunInterface) {
+			return false
+		}
+		serviceName, err := services.ServiceNameOfTunnel(interfaceName)
+		if err != nil {
+			log.Printf("Removing Wintun interface ‘%s’ because determining tunnel service name failed: %v", interfaceName, err)
+			return true
+		}
+		service, err := m.OpenService(serviceName)
+		if err == windows.ERROR_SERVICE_DOES_NOT_EXIST {
+			log.Printf("Removing Wintun interface ‘%s’ because no service for it exists", interfaceName)
+			return true
+		} else if err != nil {
+			return false
+		}
+		defer service.Close()
+		status, err := service.Query()
+		if err != nil {
+			return false
+		}
+		if status.State == svc.Stopped {
+			log.Printf("Removing Wintun interface ‘%s’ because its service is stopped", interfaceName)
+			return true
+		}
+		return false
+	})
+}