From e67c55d2d39fea60ee06ca14ca7b61ba638b7f2a Mon Sep 17 00:00:00 2001
From: cyBerta <cyberta@riseup.net>
Date: Wed, 8 Jan 2020 05:06:23 +0100
Subject: implement bluetooth tethering detection, refactor TetheringObservable

---
 .../tethering/TetheringStateManager.java           | 93 ++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 app/src/main/java/se/leap/bitmaskclient/tethering/TetheringStateManager.java

(limited to 'app/src/main/java/se/leap/bitmaskclient/tethering/TetheringStateManager.java')

diff --git a/app/src/main/java/se/leap/bitmaskclient/tethering/TetheringStateManager.java b/app/src/main/java/se/leap/bitmaskclient/tethering/TetheringStateManager.java
new file mode 100644
index 00000000..1e2521b8
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/tethering/TetheringStateManager.java
@@ -0,0 +1,93 @@
+package se.leap.bitmaskclient.tethering;
+
+import android.content.Context;
+import android.content.IntentFilter;
+import android.net.wifi.WifiManager;
+
+import java.lang.reflect.Method;
+import java.net.NetworkInterface;
+import java.util.Enumeration;
+
+import se.leap.bitmaskclient.utils.Cmd;
+
+public class TetheringStateManager {
+    private static final String TAG = TetheringStateManager.class.getSimpleName();
+    private static TetheringStateManager instance;
+
+    private WifiManager wifiManager;
+
+    private TetheringStateManager() { }
+
+    public static TetheringStateManager getInstance() {
+        if (instance == null) {
+            instance = new TetheringStateManager();
+        }
+        return instance;
+    }
+
+    public void init(Context context) {
+        TetheringBroadcastReceiver broadcastReceiver = new TetheringBroadcastReceiver();
+        IntentFilter intentFilter = new IntentFilter("android.net.conn.TETHER_STATE_CHANGED");
+        intentFilter.addAction("android.net.wifi.WIFI_AP_STATE_CHANGED");
+        context.getApplicationContext().registerReceiver(broadcastReceiver, intentFilter);
+        instance.wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
+        updateWifiTetheringState();
+        updateUsbTetheringState();
+        updateBluetoothTetheringState();
+    }
+
+    private static boolean isWifiApEnabled() {
+        try {
+            Method method = instance.wifiManager.getClass().getMethod("getWifiApState");
+            int tmp = ((Integer) method.invoke(instance.wifiManager));
+            return WifiHotspotState.WIFI_AP_STATE_ENABLED.ordinal() == tmp % 10;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+
+    private static boolean getUsbTetheringState() {
+        try {
+            for(Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
+                NetworkInterface networkInterface = en.nextElement();
+                if(!networkInterface.isLoopback()){
+                    if(networkInterface.getName().contains("rndis") || networkInterface.getName().contains("usb")){
+                        return true;
+                    }
+                }
+            }
+        } catch(Exception e){
+            e.printStackTrace();
+        }
+
+        return false;
+    }
+
+    // Check whether Bluetooth tethering is enabled.
+    private static boolean isBluetoothTetheringEnabled() {
+        StringBuilder log = new StringBuilder();
+        boolean hasBtPan = false;
+        try {
+            hasBtPan = Cmd.runBlockingCmd(new String[] {"ifconfig bt-pan"}, log) == 0;
+            //Log.d(TAG, "ifconfig result: " + log.toString());
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return hasBtPan;
+
+    }
+
+    static void updateUsbTetheringState() {
+        TetheringObservable.setUsbTethering(getUsbTetheringState());
+    }
+
+    static void updateBluetoothTetheringState() {
+        TetheringObservable.setBluetoothTethering(isBluetoothTetheringEnabled());
+    }
+
+    static void updateWifiTetheringState() {
+        TetheringObservable.setWifiTethering(isWifiApEnabled());
+    }
+
+}
-- 
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