1 files changed, 92 insertions, 0 deletions
diff --git a/app/src/main/java/se/leap/bitmaskclient/tethering/TetheringObserver.java b/app/src/main/java/se/leap/bitmaskclient/tethering/TetheringObserver.java
new file mode 100644
index 00000000..1d1fa951
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/tethering/TetheringObserver.java
@@ -0,0 +1,92 @@
+package se.leap.bitmaskclient.tethering;
+
+import android.content.Context;
+import android.content.IntentFilter;
+import android.net.ConnectivityManager;
+import android.net.wifi.WifiManager;
+
+import java.lang.reflect.Method;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.util.Enumeration;
+
+public class TetheringObserver {
+    private static TetheringObserver instance;
+
+    private boolean isWifiTetheringEnabled;
+    private boolean isUsbTetheringEnabled;
+    private WifiManager wifiManager;
+    private ConnectivityManager connectivityManager;
+    private TetheringBroadcastReceiver broadcastReceiver;
+
+    private TetheringObserver() {
+    }
+
+    public static void init(Context context) {
+        if (instance == null) {
+            instance = new TetheringObserver();
+            instance.broadcastReceiver = new TetheringBroadcastReceiver();
+            IntentFilter intentFilter = new IntentFilter("android.net.wifi.WIFI_AP_STATE_CHANGED");
+            intentFilter.addAction("android.net.conn.TETHER_STATE_CHANGED");
+            context.getApplicationContext().registerReceiver(instance.broadcastReceiver, intentFilter);
+            instance.wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
+            instance.setWifiTetheringEnabled(instance.isWifiApEnabled());
+            instance.connectivityManager = (ConnectivityManager) context.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+        }
+    }
+
+    private boolean isWifiApEnabled() {
+        try {
+            Method method = instance.wifiManager.getClass().getMethod("getWifiApState");
+            int tmp = ((Integer) method.invoke(wifiManager));
+            return WifiHotspotState.WIFI_AP_STATE_ENABLED.ordinal() == tmp % 10;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    private boolean getUsbTetheringState() {
+        try {
+
+            for(Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
+                NetworkInterface networkInterface = en.nextElement();
+                for(Enumeration<InetAddress> enumIpAddr = networkInterface.getInetAddresses(); enumIpAddr.hasMoreElements();){
+                    InetAddress inetAddress = enumIpAddr.nextElement();
+                    if(!networkInterface.isLoopback()){
+                        if(networkInterface.getName().contains("rndis") || networkInterface.getName().contains("usb")){
+                            return true;
+                        }
+                    }
+                }
+            }
+        } catch(Exception e){
+            e.printStackTrace();
+        }
+
+        return false;
+    }
+
+    public static TetheringObserver getInstance() {
+        if (instance == null) {
+            throw new RuntimeException("Call init() first!");
+        }
+
+        return instance;
+    }
+
+    void setWifiTetheringEnabled(boolean enabled) {
+        isWifiTetheringEnabled = enabled;
+    }
+
+    public boolean isWifiTetheringEnabled() {
+        return isWifiTetheringEnabled;
+    }
+
+    void updateUsbTetheringState() {
+        isUsbTetheringEnabled = getUsbTetheringState();
+    }
+
+    public boolean isUsbTetheringEnabled() {
+        return isUsbTetheringEnabled;
+    }
+}