Support Wi-Fi keep alives

mobile/src/main/java/be/mygod/vpnhotspot/LocalOnlyHotspotService.kt

@@ -8,6 +8,7 @@ import be.mygod.vpnhotspot.App.Companion.app
 import be.mygod.vpnhotspot.manage.LocalOnlyHotspotManager
 import be.mygod.vpnhotspot.net.monitor.IpNeighbourMonitor
 import be.mygod.vpnhotspot.net.TetheringManager
+import be.mygod.vpnhotspot.net.wifi.WifiDoubleLock
 import be.mygod.vpnhotspot.util.broadcastReceiver
 import be.mygod.vpnhotspot.widget.SmartSnackbar
 import timber.log.Timber
@@ -30,6 +31,7 @@ class LocalOnlyHotspotService : IpNeighbourMonitoringService() {
     private val binder = Binder()
     private var reservation: WifiManager.LocalOnlyHotspotReservation? = null
     private var routingManager: LocalOnlyInterfaceManager? = null
+    private var locked = false
     private var receiverRegistered = false
     private val receiver = broadcastReceiver { _, intent ->
         val ifaces = TetheringManager.getLocalOnlyTetheredIfaces(intent.extras ?: return@broadcastReceiver)
@@ -63,6 +65,9 @@ class LocalOnlyHotspotService : IpNeighbourMonitoringService() {
                 override fun onStarted(reservation: WifiManager.LocalOnlyHotspotReservation?) {
                     if (reservation == null) onFailed(-2) else {
                         this@LocalOnlyHotspotService.reservation = reservation
+                        check(!locked)
+                        WifiDoubleLock.acquire()
+                        locked = true
                         if (!receiverRegistered) {
                             registerReceiver(receiver, IntentFilter(TetheringManager.ACTION_TETHER_STATE_CHANGED))
                             receiverRegistered = true
@@ -119,6 +124,10 @@ class LocalOnlyHotspotService : IpNeighbourMonitoringService() {
     private fun unregisterReceiver() {
         routingManager?.stop()
         routingManager = null
+        if (locked) {
+            WifiDoubleLock.release()
+            locked = false
+        }
         if (receiverRegistered) {
             unregisterReceiver(receiver)
             IpNeighbourMonitor.unregisterCallback(this)