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;
+    
+};

OpenVPN Adapter/OpenVPNReachabilityTracker.mm

@@ -0,0 +1,33 @@
+//
+//  OpenVPNReachabilityTracker.m
+//  OpenVPN Adapter
+//
+//  Created by Sergey Abramchuk on 17.07.17.
+//
+//
+
+#import "OpenVPNReachability+Internal.h"
+#import "OpenVPNReachabilityTracker.h"
+
+OpenVPNReachabilityTracker::OpenVPNReachabilityTracker(const bool enable_internet, const bool enable_wifi, void* handler) : ReachabilityTracker(enable_internet, enable_wifi) {
+    this->handler = handler;
+}
+
+void OpenVPNReachabilityTracker::reachability_tracker_event(const ReachabilityBase& rb, SCNetworkReachabilityFlags flags) {
+    OpenVPNReachability* handler = (__bridge OpenVPNReachability* )this->handler;
+    
+    ReachabilityInterface::Status status = rb.status();
+    switch (status) {
+        case ReachabilityInterface::NotReachable:
+            [handler updateReachabilityStatus:OpenVPNReachabilityStatusNotReachable];
+            break;
+            
+        case ReachabilityInterface::ReachableViaWiFi:
+            [handler updateReachabilityStatus:OpenVPNReachabilityStatusReachableViaWiFi];
+            break;
+            
+        case ReachabilityInterface::ReachableViaWWAN:
+            [handler updateReachabilityStatus:OpenVPNReachabilityStatusReachableViaWWAN];
+            break;
+    }
+}