Implement abstract tracker class

OpenVPN Adapter/OpenVPNReachabilityTracker.h

@@ -0,0 +1,21 @@
+//
+//  OpenVPNReachabilityTracker.h
+//  OpenVPN Adapter
+//
+//  Created by Sergey Abramchuk on 17.07.17.
+//
+//
+
+#import <openvpn/apple/reachable.hpp>
+
+using namespace openvpn;
+
+class OpenVPNReachabilityTracker : public ReachabilityTracker {
+    OpenVPNReachabilityTracker(const bool enable_internet, const bool enable_wifi, void* handler);
+    
+    virtual void reachability_tracker_event(const ReachabilityBase& rb, SCNetworkReachabilityFlags flags) override;
+    
+private:
+    void* handler;
+    
+};