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/* 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
})
}
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