WireGuard rework for MacOS and Windows (#314)

WireGuard rework for MacOS and Windows

client/platforms/windows/windowsnetworkwatcher.h

@@ -0,0 +1,34 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef WINDOWSNETWORKWATCHER_H
+#define WINDOWSNETWORKWATCHER_H
+
+#include <windows.h>
+#include <wlanapi.h>
+
+#include "networkwatcherimpl.h"
+
+class WindowsNetworkWatcher final : public NetworkWatcherImpl {
+ public:
+  WindowsNetworkWatcher(QObject* parent);
+  ~WindowsNetworkWatcher();
+
+  void initialize() override;
+
+  NetworkWatcherImpl::TransportType getTransportType() override;
+
+ private:
+  static void wlanCallback(PWLAN_NOTIFICATION_DATA data, PVOID context);
+
+  void processWlan(PWLAN_NOTIFICATION_DATA data);
+
+ private:
+  // The handle is set during the initialization. Windows calls processWlan()
+  // to inform about network changes.
+  HANDLE m_wlanHandle = nullptr;
+  QString m_lastBSSID;
+};
+
+#endif  // WINDOWSNETWORKWATCHER_H