Java tutorial
package android_network.hetnet.vpn_service; /* This file is part of NetGuard. NetGuard is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. NetGuard is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with NetGuard. If not, see <http://www.gnu.org/licenses/>. Copyright 2015-2017 by Marcel Bokhorst (M66B) */ import android.annotation.TargetApi; import android.app.AlarmManager; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.content.res.Configuration; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Typeface; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.TrafficStats; import android.net.Uri; import android.net.VpnService; import android.os.Build; import android.os.Handler; import android.os.HandlerThread; import android.os.Looper; import android.os.Message; import android.os.ParcelFileDescriptor; import android.os.PowerManager; import android.os.Process; import android.os.SystemClock; import android.preference.PreferenceManager; import android.support.v4.app.NotificationCompat; import android.support.v4.app.NotificationManagerCompat; import android.support.v4.content.ContextCompat; import android.support.v4.content.LocalBroadcastManager; import android.telephony.PhoneStateListener; import android.telephony.ServiceState; import android.telephony.SubscriptionManager; import android.telephony.TelephonyManager; import android.text.Spannable; import android.text.SpannableString; import android.text.TextUtils; import android.text.style.ForegroundColorSpan; import android.text.style.StyleSpan; import android.util.Log; import android.util.TypedValue; import android.widget.RemoteViews; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.io.InputStreamReader; import java.math.BigInteger; import java.net.Inet4Address; import java.net.InetAddress; import java.net.InterfaceAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.net.URL; import java.net.UnknownHostException; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.Enumeration; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import java.util.TreeMap; import java.util.concurrent.locks.ReentrantReadWriteLock; import javax.net.ssl.HttpsURLConnection; import android_network.hetnet.MainActivity; import android_network.hetnet.R; public class ServiceSinkhole extends VpnService implements SharedPreferences.OnSharedPreferenceChangeListener { private static final String TAG = "NetGuard.Service"; private boolean registeredInteractiveState = false; private boolean registeredPowerSave = false; private boolean registeredUser = false; private boolean registeredIdleState = false; private boolean registeredConnectivityChanged = false; private boolean registeredPackageAdded = false; private State state = State.none; private boolean user_foreground = true; private boolean last_connected = false; private boolean last_metered = true; private boolean last_interactive = false; private boolean powersaving = false; private boolean phone_state = false; private Object subscriptionsChangedListener = null; private ServiceSinkhole.Builder last_builder = null; private ParcelFileDescriptor vpn = null; private long last_hosts_modified = 0; private Map<String, Boolean> mapHostsBlocked = new HashMap<>(); private Map<Integer, Boolean> mapUidAllowed = new HashMap<>(); private Map<Integer, Integer> mapUidKnown = new HashMap<>(); private Map<Long, Map<InetAddress, IPRule>> mapUidIPFilters = new HashMap<>(); private Map<Integer, Forward> mapForward = new HashMap<>(); private Map<Integer, Boolean> mapNoNotify = new HashMap<>(); private ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); private volatile Looper commandLooper; private volatile Looper logLooper; private volatile Looper statsLooper; private volatile CommandHandler commandHandler; private volatile LogHandler logHandler; private volatile StatsHandler statsHandler; private static final int NOTIFY_ENFORCING = 1; private static final int NOTIFY_WAITING = 2; private static final int NOTIFY_DISABLED = 3; private static final int NOTIFY_AUTOSTART = 4; private static final int NOTIFY_ERROR = 5; private static final int NOTIFY_TRAFFIC = 6; private static final int NOTIFY_UPDATE = 7; public static final String EXTRA_COMMAND = "Command"; private static final String EXTRA_REASON = "Reason"; public static final String EXTRA_NETWORK = "Network"; public static final String EXTRA_UID = "UID"; public static final String EXTRA_PACKAGE = "Package"; public static final String EXTRA_BLOCKED = "Blocked"; private static final int MSG_SERVICE_INTENT = 0; private static final int MSG_STATS_START = 1; private static final int MSG_STATS_STOP = 2; private static final int MSG_STATS_UPDATE = 3; private static final int MSG_PACKET = 4; private static final int MSG_USAGE = 5; private enum State { none, waiting, enforcing, stats } public enum Command { run, start, reload, stop, stats, set, householding, watchdog } private static volatile PowerManager.WakeLock wlInstance = null; private static final String ACTION_HOUSE_HOLDING = "eu.faircode.netguard.HOUSE_HOLDING"; private static final String ACTION_SCREEN_OFF_DELAYED = "eu.faircode.netguard.SCREEN_OFF_DELAYED"; private static final String ACTION_WATCHDOG = "eu.faircode.netguard.WATCHDOG"; private native void jni_init(); private native void jni_start(int tun, boolean fwd53, int rcode, int loglevel); private native void jni_stop(int tun, boolean clr); private native int jni_get_mtu(); private native int[] jni_get_stats(); private static native void jni_pcap(String name, int record_size, int file_size); private native void jni_socks5(String addr, int port, String username, String password); private native void jni_done(); public static void setPcap(boolean enabled, Context context) { File pcap = (enabled ? new File(context.getDir("data", MODE_PRIVATE), "netguard.pcap") : null); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); String r = prefs.getString("pcap_record_size", null); if (TextUtils.isEmpty(r)) r = "64"; String f = prefs.getString("pcap_file_size", null); if (TextUtils.isEmpty(f)) f = "2"; int record_size = Integer.parseInt(r); int file_size = Integer.parseInt(f) * 1024 * 1024; jni_pcap(pcap == null ? null : pcap.getAbsolutePath(), record_size, file_size); } synchronized private static PowerManager.WakeLock getLock(Context context) { if (wlInstance == null) { PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); wlInstance = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, context.getString(R.string.app_name) + " wakelock"); wlInstance.setReferenceCounted(true); } return wlInstance; } private final class CommandHandler extends Handler { public int queue = 0; public CommandHandler(Looper looper) { super(looper); } private void reportQueueSize() { Intent ruleset = new Intent(MainActivity.ACTION_QUEUE_CHANGED); ruleset.putExtra(MainActivity.EXTRA_SIZE, queue); LocalBroadcastManager.getInstance(ServiceSinkhole.this).sendBroadcast(ruleset); } public void queue(Intent intent) { synchronized (this) { queue++; reportQueueSize(); } Message msg = commandHandler.obtainMessage(); msg.obj = intent; msg.what = MSG_SERVICE_INTENT; commandHandler.sendMessage(msg); } @Override public void handleMessage(Message msg) { try { switch (msg.what) { case MSG_SERVICE_INTENT: handleIntent((Intent) msg.obj); break; default: Log.e(TAG, "Unknown command message=" + msg.what); } } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } finally { synchronized (this) { queue--; reportQueueSize(); } try { PowerManager.WakeLock wl = getLock(ServiceSinkhole.this); if (wl.isHeld()) wl.release(); else Log.w(TAG, "Wakelock under-locked"); Log.i(TAG, "Messages=" + hasMessages(0) + " wakelock=" + wlInstance.isHeld()); } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } } private void handleIntent(Intent intent) { final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); Command cmd = (Command) intent.getSerializableExtra(EXTRA_COMMAND); String reason = intent.getStringExtra(EXTRA_REASON); Log.i(TAG, "Executing intent=" + intent + " command=" + cmd + " reason=" + reason + " vpn=" + (vpn != null) + " user=" + (Process.myUid() / 100000)); // Check if foreground if (cmd != Command.stop) if (!user_foreground) { Log.i(TAG, "Command " + cmd + "ignored for background user"); return; } if (prefs.getBoolean("screen_on", true)) { Log.i(TAG, "Started listening for interactive state changes"); if (prefs.getBoolean("screen_on", true)) { last_interactive = Util.isInteractive(ServiceSinkhole.this); IntentFilter ifInteractive = new IntentFilter(); ifInteractive.addAction(Intent.ACTION_SCREEN_ON); ifInteractive.addAction(Intent.ACTION_SCREEN_OFF); ifInteractive.addAction(ACTION_SCREEN_OFF_DELAYED); registerReceiver(interactiveStateReceiver, ifInteractive); registeredInteractiveState = true; } } else { Log.i(TAG, "Stopped listening for interactive state changes"); if (registeredInteractiveState) { unregisterReceiver(interactiveStateReceiver); registeredInteractiveState = false; } } // Listen for phone state changes TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); if (tm != null && !phone_state && Util.hasPhoneStatePermission(ServiceSinkhole.this)) { tm.listen(phoneStateListener, PhoneStateListener.LISTEN_DATA_CONNECTION_STATE | PhoneStateListener.LISTEN_SERVICE_STATE); phone_state = true; Log.i(TAG, "Listening to service state changes"); } // Listen for data SIM changes if (subscriptionsChangedListener == null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1 && Util.hasPhoneStatePermission(ServiceSinkhole.this)) { SubscriptionManager sm = SubscriptionManager.from(ServiceSinkhole.this); subscriptionsChangedListener = new SubscriptionManager.OnSubscriptionsChangedListener() { @Override public void onSubscriptionsChanged() { Log.i(TAG, "Subscriptions changed"); if (prefs.getBoolean("national_roaming", false)) ServiceSinkhole.reload("Subscriptions changed", ServiceSinkhole.this); } }; sm.addOnSubscriptionsChangedListener( (SubscriptionManager.OnSubscriptionsChangedListener) subscriptionsChangedListener); Log.i(TAG, "Listening to subscription changes"); } // Watchdog if (cmd == Command.start || cmd == Command.reload) { Intent watchdogIntent = new Intent(ServiceSinkhole.this, ServiceSinkhole.class); watchdogIntent.setAction(ACTION_WATCHDOG); PendingIntent pi = PendingIntent.getService(ServiceSinkhole.this, 1, watchdogIntent, PendingIntent.FLAG_UPDATE_CURRENT); AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE); am.cancel(pi); int watchdog = Integer.parseInt(prefs.getString("watchdog", "0")); if (watchdog > 0) { Log.i(TAG, "Watchdog " + watchdog + " minutes"); am.setInexactRepeating(AlarmManager.RTC, SystemClock.elapsedRealtime() + watchdog * 60 * 1000, watchdog * 60 * 1000, pi); } } try { switch (cmd) { case run: run(); break; case start: start(); break; case reload: reload(); break; case stop: stop(); break; case stats: statsHandler.sendEmptyMessage(MSG_STATS_STOP); statsHandler.sendEmptyMessage(MSG_STATS_START); break; case householding: householding(intent); break; case watchdog: watchdog(intent); break; default: Log.e(TAG, "Unknown command=" + cmd); } if (cmd != Command.watchdog) { // Update main view Intent ruleset = new Intent(MainActivity.ACTION_RULES_CHANGED); ruleset.putExtra(MainActivity.EXTRA_CONNECTED, cmd == Command.stop ? false : last_connected); ruleset.putExtra(MainActivity.EXTRA_METERED, cmd == Command.stop ? false : last_metered); LocalBroadcastManager.getInstance(ServiceSinkhole.this).sendBroadcast(ruleset); // Update widgets // Widget.updateWidgets(ServiceSinkhole.this); } } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); if (cmd == Command.start || cmd == Command.reload) { if (VpnService.prepare(ServiceSinkhole.this) == null) { Log.w(TAG, "VPN not prepared connected=" + last_connected); if (last_connected) { showAutoStartNotification(); if (!Util.isPlayStoreInstall(ServiceSinkhole.this)) showErrorNotification(ex.toString()); } // Retried on connectivity change } else { showErrorNotification(ex.toString()); // Disable firewall prefs.edit().putBoolean("enabled", false).apply(); // Widget.updateWidgets(ServiceSinkhole.this); } } else showErrorNotification(ex.toString()); } } private void run() { if (state == State.none) { startForeground(NOTIFY_WAITING, getWaitingNotification()); state = State.waiting; Log.d(TAG, "Start foreground state=" + state.toString()); } } private void start() { if (vpn == null) { if (state != State.none) { Log.d(TAG, "Stop foreground state=" + state.toString()); stopForeground(true); } startForeground(NOTIFY_ENFORCING, getEnforcingNotification(0, 0, 0)); state = State.enforcing; Log.d(TAG, "Start foreground state=" + state.toString()); List<Rule> listRule = Rule.getRules(true, ServiceSinkhole.this); List<Rule> listAllowed = getAllowedRules(listRule); last_builder = getBuilder(listAllowed, listRule); vpn = startVPN(last_builder); if (vpn == null) throw new IllegalStateException(getString((R.string.msg_start_failed))); startNative(vpn, listAllowed, listRule); removeWarningNotifications(); updateEnforcingNotification(listAllowed.size(), listRule.size()); } } private void reload() { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); if (state != State.enforcing) { if (state != State.none) { Log.d(TAG, "Stop foreground state=" + state.toString()); stopForeground(true); } startForeground(NOTIFY_ENFORCING, getEnforcingNotification(0, 0, 0)); state = State.enforcing; Log.d(TAG, "Start foreground state=" + state.toString()); } List<Rule> listRule = Rule.getRules(true, ServiceSinkhole.this); List<Rule> listAllowed = getAllowedRules(listRule); ServiceSinkhole.Builder builder = getBuilder(listAllowed, listRule); if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP_MR1) { last_builder = builder; Log.i(TAG, "Legacy restart"); if (vpn != null) { stopNative(vpn, false); stopVPN(vpn); vpn = null; try { Thread.sleep(500); } catch (InterruptedException ignored) { } } vpn = startVPN(last_builder); } else { if (vpn != null && prefs.getBoolean("filter", false) && builder.equals(last_builder)) { Log.i(TAG, "Native restart"); stopNative(vpn, false); } else { last_builder = builder; Log.i(TAG, "VPN restart"); // Attempt seamless handover ParcelFileDescriptor prev = vpn; vpn = startVPN(builder); if (prev != null && vpn == null) { Log.w(TAG, "Handover failed"); stopNative(prev, false); stopVPN(prev); prev = null; try { Thread.sleep(3000); } catch (InterruptedException ignored) { } vpn = startVPN(last_builder); if (vpn == null) throw new IllegalStateException("Handover failed"); } if (prev != null) { stopNative(prev, false); stopVPN(prev); } } } if (vpn == null) throw new IllegalStateException(getString((R.string.msg_start_failed))); startNative(vpn, listAllowed, listRule); removeWarningNotifications(); updateEnforcingNotification(listAllowed.size(), listRule.size()); } private void stop() { if (vpn != null) { stopNative(vpn, true); stopVPN(vpn); vpn = null; unprepare(); } if (state == State.enforcing) { Log.d(TAG, "Stop foreground state=" + state.toString()); stopForeground(true); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); if (prefs.getBoolean("show_stats", false)) { startForeground(NOTIFY_WAITING, getWaitingNotification()); state = State.waiting; Log.d(TAG, "Start foreground state=" + state.toString()); } else state = State.none; } } private void householding(Intent intent) { // Keep log records for three days DatabaseHelper.getInstance(ServiceSinkhole.this) .cleanupLog(new Date().getTime() - 3 * 24 * 3600 * 1000L); // Clear expired DNS records DatabaseHelper.getInstance(ServiceSinkhole.this).cleanupDns(); // Check for update SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); if (!Util.isPlayStoreInstall(ServiceSinkhole.this) && prefs.getBoolean("update_check", true)) checkUpdate(); } private void watchdog(Intent intent) { if (vpn == null) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); if (prefs.getBoolean("enabled", false)) { Log.e(TAG, "Service was killed"); start(); } } } private void checkUpdate() { StringBuilder json = new StringBuilder(); HttpsURLConnection urlConnection = null; try { URL url = new URL("https://api.github.com/repos/M66B/NetGuard/releases/latest"); urlConnection = (HttpsURLConnection) url.openConnection(); BufferedReader br = new BufferedReader(new InputStreamReader(urlConnection.getInputStream())); String line; while ((line = br.readLine()) != null) json.append(line); } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } finally { if (urlConnection != null) urlConnection.disconnect(); } try { JSONObject jroot = new JSONObject(json.toString()); if (jroot.has("tag_name") && jroot.has("assets")) { JSONArray jassets = jroot.getJSONArray("assets"); if (jassets.length() > 0) { JSONObject jasset = jassets.getJSONObject(0); if (jasset.has("name") && jasset.has("browser_download_url")) { String version = jroot.getString("tag_name"); String name = jasset.getString("name"); String url = jasset.getString("browser_download_url"); Log.i(TAG, "Tag " + version + " name " + name + " url " + url); Version current = new Version(Util.getSelfVersionName(ServiceSinkhole.this)); Version available = new Version(version); if (current.compareTo(available) < 0) { Log.i(TAG, "Update available from " + current + " to " + available); showUpdateNotification(name, url); } else Log.i(TAG, "Up-to-date current version " + current); } } } } catch (JSONException ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } } private final class LogHandler extends Handler { public LogHandler(Looper looper) { super(looper); } @Override // -- receive Message containing packets from logPacket and log it public void handleMessage(Message msg) { try { if (powersaving && (msg.what == MSG_PACKET || msg.what == MSG_USAGE)) return; switch (msg.what) { case MSG_PACKET: log((Packet) msg.obj, msg.arg1, msg.arg2 > 0); break; case MSG_USAGE: usage((Usage) msg.obj); break; default: Log.e(TAG, "Unknown log message=" + msg.what); } } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } private void log(Packet packet, int connection, boolean interactive) { // Get settings SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); boolean log = prefs.getBoolean("log", false); boolean log_app = prefs.getBoolean("log_app", false); DatabaseHelper dh = DatabaseHelper.getInstance(ServiceSinkhole.this); // Get real name String dname = dh.getQName(packet.uid, packet.daddr); // Traffic log if (log) dh.insertLog(packet, dname, connection, interactive); // Application log if (log_app && packet.uid >= 0 && !(packet.uid == 0 && packet.protocol == 17 && packet.dport == 53)) { if (!(packet.protocol == 6 /* TCP */ || packet.protocol == 17 /* UDP */)) packet.dport = 0; if (dh.updateAccess(packet, dname, -1)) { lock.readLock().lock(); if (mapNoNotify.containsKey(packet.uid) && mapNoNotify.get(packet.uid)) showAccessNotification(packet.uid); lock.readLock().unlock(); } } } private void usage(Usage usage) { if (usage.Uid >= 0 && !(usage.Uid == 0 && usage.Protocol == 17 && usage.DPort == 53)) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); boolean filter = prefs.getBoolean("filter", false); boolean log_app = prefs.getBoolean("log_app", false); boolean track_usage = prefs.getBoolean("track_usage", false); if (filter && log_app && track_usage) { DatabaseHelper dh = DatabaseHelper.getInstance(ServiceSinkhole.this); String dname = dh.getQName(usage.Uid, usage.DAddr); Log.i(TAG, "Usage account " + usage + " dname=" + dname); dh.updateUsage(usage, dname); } } } } private final class StatsHandler extends Handler { private boolean stats = false; private long when; private long t = -1; private long tx = -1; private long rx = -1; private List<Long> gt = new ArrayList<>(); private List<Float> gtx = new ArrayList<>(); private List<Float> grx = new ArrayList<>(); private HashMap<Integer, Long> mapUidBytes = new HashMap<>(); public StatsHandler(Looper looper) { super(looper); } @Override public void handleMessage(Message msg) { try { switch (msg.what) { case MSG_STATS_START: startStats(); break; case MSG_STATS_STOP: stopStats(); break; case MSG_STATS_UPDATE: updateStats(); break; default: Log.e(TAG, "Unknown stats message=" + msg.what); } } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } private void startStats() { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); boolean enabled = (!stats && prefs.getBoolean("show_stats", false)); Log.i(TAG, "Stats start enabled=" + enabled); if (enabled) { when = new Date().getTime(); t = -1; tx = -1; rx = -1; gt.clear(); gtx.clear(); grx.clear(); mapUidBytes.clear(); stats = true; updateStats(); } } private void stopStats() { Log.i(TAG, "Stats stop"); stats = false; this.removeMessages(MSG_STATS_UPDATE); if (state == State.stats) { Log.d(TAG, "Stop foreground state=" + state.toString()); stopForeground(true); state = State.none; } else NotificationManagerCompat.from(ServiceSinkhole.this).cancel(NOTIFY_TRAFFIC); } private void updateStats() { RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.traffic); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); long frequency = Long.parseLong(prefs.getString("stats_frequency", "1000")); long samples = Long.parseLong(prefs.getString("stats_samples", "90")); boolean filter = prefs.getBoolean("filter", false); boolean show_top = prefs.getBoolean("show_top", false); int loglevel = Integer.parseInt(prefs.getString("loglevel", Integer.toString(Log.WARN))); // Schedule next update this.sendEmptyMessageDelayed(MSG_STATS_UPDATE, frequency); long ct = SystemClock.elapsedRealtime(); // Cleanup while (gt.size() > 0 && ct - gt.get(0) > samples * 1000) { gt.remove(0); gtx.remove(0); grx.remove(0); } // Calculate network speed float txsec = 0; float rxsec = 0; long ttx = TrafficStats.getTotalTxBytes(); long trx = TrafficStats.getTotalRxBytes(); if (filter) { ttx -= TrafficStats.getUidTxBytes(Process.myUid()); trx -= TrafficStats.getUidRxBytes(Process.myUid()); if (ttx < 0) ttx = 0; if (trx < 0) trx = 0; } if (t > 0 && tx > 0 && rx > 0) { float dt = (ct - t) / 1000f; txsec = (ttx - tx) / dt; rxsec = (trx - rx) / dt; gt.add(ct); gtx.add(txsec); grx.add(rxsec); } // Calculate application speeds if (show_top) { if (mapUidBytes.size() == 0) { for (ApplicationInfo ainfo : getPackageManager().getInstalledApplications(0)) if (ainfo.uid != Process.myUid()) mapUidBytes.put(ainfo.uid, TrafficStats.getUidTxBytes(ainfo.uid) + TrafficStats.getUidRxBytes(ainfo.uid)); } else if (t > 0) { TreeMap<Float, Integer> mapSpeedUid = new TreeMap<>(new Comparator<Float>() { @Override public int compare(Float value, Float other) { return -value.compareTo(other); } }); float dt = (ct - t) / 1000f; for (int uid : mapUidBytes.keySet()) { long bytes = TrafficStats.getUidTxBytes(uid) + TrafficStats.getUidRxBytes(uid); float speed = (bytes - mapUidBytes.get(uid)) / dt; if (speed > 0) { mapSpeedUid.put(speed, uid); mapUidBytes.put(uid, bytes); } } StringBuilder sb = new StringBuilder(); int i = 0; for (float speed : mapSpeedUid.keySet()) { if (i++ >= 3) break; if (speed < 1000 * 1000) sb.append(getString(R.string.msg_kbsec, speed / 1000)); else sb.append(getString(R.string.msg_mbsec, speed / 1000 / 1000)); sb.append(' '); List<String> apps = Util.getApplicationNames(mapSpeedUid.get(speed), ServiceSinkhole.this); sb.append(apps.size() > 0 ? apps.get(0) : "?"); sb.append("\r\n"); } if (sb.length() > 0) sb.setLength(sb.length() - 2); remoteViews.setTextViewText(R.id.tvTop, sb.toString()); } } t = ct; tx = ttx; rx = trx; // Create bitmap int height = Util.dips2pixels(96, ServiceSinkhole.this); int width = Util.dips2pixels(96 * 5, ServiceSinkhole.this); Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); // Create canvas Canvas canvas = new Canvas(bitmap); canvas.drawColor(Color.TRANSPARENT); // Determine max float max = 0; long xmax = 0; float ymax = 0; for (int i = 0; i < gt.size(); i++) { long t = gt.get(i); float tx = gtx.get(i); float rx = grx.get(i); if (t > xmax) xmax = t; if (tx > max) max = tx; if (rx > max) max = rx; if (tx > ymax) ymax = tx; if (rx > ymax) ymax = rx; } // Build paths Path ptx = new Path(); Path prx = new Path(); for (int i = 0; i < gtx.size(); i++) { float x = width - width * (xmax - gt.get(i)) / 1000f / samples; float ytx = height - height * gtx.get(i) / ymax; float yrx = height - height * grx.get(i) / ymax; if (i == 0) { ptx.moveTo(x, ytx); prx.moveTo(x, yrx); } else { ptx.lineTo(x, ytx); prx.lineTo(x, yrx); } } // Build paint Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); paint.setStyle(Paint.Style.STROKE); // Draw scale line paint.setStrokeWidth(Util.dips2pixels(1, ServiceSinkhole.this)); paint.setColor(ContextCompat.getColor(ServiceSinkhole.this, R.color.colorGrayed)); float y = height / 2; canvas.drawLine(0, y, width, y, paint); // Draw paths paint.setStrokeWidth(Util.dips2pixels(2, ServiceSinkhole.this)); paint.setColor(ContextCompat.getColor(ServiceSinkhole.this, R.color.colorSend)); canvas.drawPath(ptx, paint); paint.setColor(ContextCompat.getColor(ServiceSinkhole.this, R.color.colorReceive)); canvas.drawPath(prx, paint); // Update remote view remoteViews.setImageViewBitmap(R.id.ivTraffic, bitmap); if (txsec < 1000 * 1000) remoteViews.setTextViewText(R.id.tvTx, getString(R.string.msg_kbsec, txsec / 1000)); else remoteViews.setTextViewText(R.id.tvTx, getString(R.string.msg_mbsec, txsec / 1000 / 1000)); if (rxsec < 1000 * 1000) remoteViews.setTextViewText(R.id.tvRx, getString(R.string.msg_kbsec, rxsec / 1000)); else remoteViews.setTextViewText(R.id.tvRx, getString(R.string.msg_mbsec, rxsec / 1000 / 1000)); if (max < 1000 * 1000) remoteViews.setTextViewText(R.id.tvMax, getString(R.string.msg_kbsec, max / 2 / 1000)); else remoteViews.setTextViewText(R.id.tvMax, getString(R.string.msg_mbsec, max / 2 / 1000 / 1000)); // Show session/file count if (filter && loglevel <= Log.WARN) { int[] count = jni_get_stats(); remoteViews.setTextViewText(R.id.tvSessions, count[0] + "/" + count[1] + "/" + count[2]); remoteViews.setTextViewText(R.id.tvFiles, count[3] + "/" + count[4]); } else { remoteViews.setTextViewText(R.id.tvSessions, ""); remoteViews.setTextViewText(R.id.tvFiles, ""); } // Show notification Intent main = new Intent(ServiceSinkhole.this, MainActivity.class); PendingIntent pi = PendingIntent.getActivity(ServiceSinkhole.this, 0, main, PendingIntent.FLAG_UPDATE_CURRENT); TypedValue tv = new TypedValue(); getTheme().resolveAttribute(R.attr.colorPrimary, tv, true); NotificationCompat.Builder builder = new NotificationCompat.Builder(ServiceSinkhole.this).setWhen(when) .setSmallIcon(R.drawable.ic_equalizer_white_24dp).setContent(remoteViews).setContentIntent(pi) .setColor(tv.data).setOngoing(true).setAutoCancel(false); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setCategory(Notification.CATEGORY_STATUS).setVisibility(Notification.VISIBILITY_PUBLIC); } if (state == State.none || state == State.waiting) { if (state != State.none) { Log.d(TAG, "Stop foreground state=" + state.toString()); stopForeground(true); } startForeground(NOTIFY_TRAFFIC, builder.build()); state = State.stats; Log.d(TAG, "Start foreground state=" + state.toString()); } else NotificationManagerCompat.from(ServiceSinkhole.this).notify(NOTIFY_TRAFFIC, builder.build()); } } public static List<InetAddress> getDns(Context context) { List<InetAddress> listDns = new ArrayList<>(); List<String> sysDns = Util.getDefaultDNS(context); // Get custom DNS servers SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); String vpnDns1 = prefs.getString("dns", null); String vpnDns2 = prefs.getString("dns2", null); Log.i(TAG, "DNS system=" + TextUtils.join(",", sysDns) + " VPN1=" + vpnDns1 + " VPN2=" + vpnDns2); if (vpnDns1 != null) try { InetAddress dns = InetAddress.getByName(vpnDns1); if (!(dns.isLoopbackAddress() || dns.isAnyLocalAddress())) listDns.add(dns); } catch (Throwable ignored) { } if (vpnDns2 != null) try { InetAddress dns = InetAddress.getByName(vpnDns2); if (!(dns.isLoopbackAddress() || dns.isAnyLocalAddress())) listDns.add(dns); } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } // Use system DNS servers only when no two custom DNS servers specified if (listDns.size() <= 1) for (String def_dns : sysDns) try { InetAddress ddns = InetAddress.getByName(def_dns); if (!listDns.contains(ddns) && !(ddns.isLoopbackAddress() || ddns.isAnyLocalAddress())) listDns.add(ddns); } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } // Remove local DNS servers when not routing LAN boolean lan = prefs.getBoolean("lan", false); if (lan) { List<InetAddress> listLocal = new ArrayList<>(); try { Enumeration<NetworkInterface> nis = NetworkInterface.getNetworkInterfaces(); if (nis != null) while (nis.hasMoreElements()) { NetworkInterface ni = nis.nextElement(); if (ni != null && ni.isUp() && !ni.isLoopback()) { List<InterfaceAddress> ias = ni.getInterfaceAddresses(); if (ias != null) for (InterfaceAddress ia : ias) { InetAddress hostAddress = ia.getAddress(); BigInteger host = new BigInteger(1, hostAddress.getAddress()); int prefix = ia.getNetworkPrefixLength(); BigInteger mask = BigInteger.valueOf(-1) .shiftLeft(hostAddress.getAddress().length * 8 - prefix); for (InetAddress dns : listDns) if (hostAddress.getAddress().length == dns.getAddress().length) { BigInteger ip = new BigInteger(1, dns.getAddress()); if (host.and(mask).equals(ip.and(mask))) { Log.i(TAG, "Local DNS server host=" + hostAddress + "/" + prefix + " dns=" + dns); listLocal.add(dns); } } } } } } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } List<InetAddress> listDns4 = new ArrayList<>(); List<InetAddress> listDns6 = new ArrayList<>(); try { listDns4.add(InetAddress.getByName("8.8.8.8")); listDns4.add(InetAddress.getByName("8.8.4.4")); listDns6.add(InetAddress.getByName("2001:4860:4860::8888")); listDns6.add(InetAddress.getByName("2001:4860:4860::8844")); } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } for (InetAddress dns : listLocal) { listDns.remove(dns); if (dns instanceof Inet4Address) { if (listDns4.size() > 0) { listDns.add(listDns4.get(0)); listDns4.remove(0); } } else { if (listDns6.size() > 0) { listDns.add(listDns6.get(0)); listDns6.remove(0); } } } } // Prefer IPv4 addresses Collections.sort(listDns, new Comparator<InetAddress>() { @Override public int compare(InetAddress a, InetAddress b) { boolean a4 = (a instanceof Inet4Address); boolean b4 = (b instanceof Inet4Address); if (a4 && !b4) return -1; else if (!a4 && b4) return 1; else return 0; } }); return listDns; } @TargetApi(Build.VERSION_CODES.LOLLIPOP) private ParcelFileDescriptor startVPN(Builder builder) throws SecurityException { try { return builder.establish(); } catch (SecurityException ex) { throw ex; } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); return null; } } private Builder getBuilder(List<Rule> listAllowed, List<Rule> listRule) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); boolean subnet = prefs.getBoolean("subnet", false); boolean tethering = prefs.getBoolean("tethering", false); boolean lan = prefs.getBoolean("lan", false); boolean ip6 = prefs.getBoolean("ip6", true); boolean filter = prefs.getBoolean("filter", false); boolean system = prefs.getBoolean("manage_system", false); // Build VPN service Builder builder = new Builder(); builder.setSession(getString(R.string.app_name)); // VPN address String vpn4 = prefs.getString("vpn4", "10.1.10.1"); Log.i(TAG, "vpn4=" + vpn4); builder.addAddress(vpn4, 32); if (ip6) { String vpn6 = prefs.getString("vpn6", "fd00:1:fd00:1:fd00:1:fd00:1"); Log.i(TAG, "vpn6=" + vpn6); builder.addAddress(vpn6, 128); } // DNS address if (filter) for (InetAddress dns : getDns(ServiceSinkhole.this)) { if (ip6 || dns instanceof Inet4Address) { Log.i(TAG, "dns=" + dns); builder.addDnsServer(dns); } } // Subnet routing if (subnet) { // Exclude IP ranges List<IPUtil.CIDR> listExclude = new ArrayList<>(); listExclude.add(new IPUtil.CIDR("127.0.0.0", 8)); // localhost if (tethering) { // USB Tethering 192.168.42.x // Wi-Fi Tethering 192.168.43.x listExclude.add(new IPUtil.CIDR("192.168.42.0", 23)); } if (lan) { try { Enumeration<NetworkInterface> nis = NetworkInterface.getNetworkInterfaces(); while (nis.hasMoreElements()) { NetworkInterface ni = nis.nextElement(); if (ni != null && ni.isUp() && !ni.isLoopback() && ni.getName() != null && !ni.getName().startsWith("tun")) for (InterfaceAddress ia : ni.getInterfaceAddresses()) if (ia.getAddress() instanceof Inet4Address) { IPUtil.CIDR local = new IPUtil.CIDR(ia.getAddress(), ia.getNetworkPrefixLength()); Log.i(TAG, "Excluding " + ni.getName() + " " + local); listExclude.add(local); } } } catch (SocketException ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } Configuration config = getResources().getConfiguration(); if (config.mcc == 310 && config.mnc == 260) { // T-Mobile Wi-Fi calling listExclude.add(new IPUtil.CIDR("66.94.2.0", 24)); listExclude.add(new IPUtil.CIDR("66.94.6.0", 23)); listExclude.add(new IPUtil.CIDR("66.94.8.0", 22)); listExclude.add(new IPUtil.CIDR("208.54.0.0", 16)); } listExclude.add(new IPUtil.CIDR("224.0.0.0", 3)); // broadcast Collections.sort(listExclude); try { InetAddress start = InetAddress.getByName("0.0.0.0"); for (IPUtil.CIDR exclude : listExclude) { Log.i(TAG, "Exclude " + exclude.getStart().getHostAddress() + "..." + exclude.getEnd().getHostAddress()); for (IPUtil.CIDR include : IPUtil.toCIDR(start, IPUtil.minus1(exclude.getStart()))) try { builder.addRoute(include.address, include.prefix); } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } start = IPUtil.plus1(exclude.getEnd()); } for (IPUtil.CIDR include : IPUtil.toCIDR("224.0.0.0", "255.255.255.255")) try { builder.addRoute(include.address, include.prefix); } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } catch (UnknownHostException ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } else builder.addRoute("0.0.0.0", 0); Log.i(TAG, "IPv6=" + ip6); if (ip6) builder.addRoute("0:0:0:0:0:0:0:0", 0); // MTU int mtu = jni_get_mtu(); Log.i(TAG, "MTU=" + mtu); builder.setMtu(mtu); // Add list of allowed applications if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) if (last_connected && !filter) for (Rule rule : listAllowed) try { builder.addDisallowedApplication(rule.info.packageName); } catch (PackageManager.NameNotFoundException ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } else if (filter) for (Rule rule : listRule) if (!rule.apply || (!system && rule.system)) try { Log.i(TAG, "Not routing " + rule.info.packageName); builder.addDisallowedApplication(rule.info.packageName); } catch (PackageManager.NameNotFoundException ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } // Build configure intent Intent configure = new Intent(this, MainActivity.class); PendingIntent pi = PendingIntent.getActivity(this, 0, configure, PendingIntent.FLAG_UPDATE_CURRENT); builder.setConfigureIntent(pi); return builder; } private void startNative(ParcelFileDescriptor vpn, List<Rule> listAllowed, List<Rule> listRule) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); boolean log = prefs.getBoolean("log", false); boolean log_app = prefs.getBoolean("log_app", false); boolean filter = prefs.getBoolean("filter", false); Log.i(TAG, "Start native log=" + log + "/" + log_app + " filter=" + filter); // Prepare rules if (filter) { prepareUidAllowed(listAllowed, listRule); prepareHostsBlocked(); prepareUidIPFilters(null); prepareForwarding(); } else { lock.writeLock().lock(); mapUidAllowed.clear(); mapUidKnown.clear(); mapHostsBlocked.clear(); mapUidIPFilters.clear(); mapForward.clear(); lock.writeLock().unlock(); } if (log_app) prepareNotify(listRule); else { lock.writeLock().lock(); mapNoNotify.clear(); lock.writeLock().unlock(); } if (log || log_app || filter) { int prio = Integer.parseInt(prefs.getString("loglevel", Integer.toString(Log.WARN))); int rcode = Integer.parseInt(prefs.getString("rcode", "3")); if (prefs.getBoolean("socks5_enabled", false)) jni_socks5(prefs.getString("socks5_addr", ""), Integer.parseInt(prefs.getString("socks5_port", "0")), prefs.getString("socks5_username", ""), prefs.getString("socks5_password", "")); else jni_socks5("", 0, "", ""); jni_start(vpn.getFd(), mapForward.containsKey(53), rcode, prio); } } private void stopNative(ParcelFileDescriptor vpn, boolean clear) { Log.i(TAG, "Stop native clear=" + clear); try { jni_stop(vpn.getFd(), clear); } catch (Throwable ex) { // File descriptor might be closed Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); jni_stop(-1, clear); } } private void unprepare() { lock.writeLock().lock(); mapUidAllowed.clear(); mapUidKnown.clear(); mapHostsBlocked.clear(); mapUidIPFilters.clear(); mapForward.clear(); mapNoNotify.clear(); lock.writeLock().unlock(); } private void prepareUidAllowed(List<Rule> listAllowed, List<Rule> listRule) { lock.writeLock().lock(); mapUidAllowed.clear(); for (Rule rule : listAllowed) mapUidAllowed.put(rule.info.applicationInfo.uid, true); mapUidKnown.clear(); for (Rule rule : listRule) mapUidKnown.put(rule.info.applicationInfo.uid, rule.info.applicationInfo.uid); lock.writeLock().unlock(); } private void prepareHostsBlocked() { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); boolean use_hosts = prefs.getBoolean("filter", false) && prefs.getBoolean("use_hosts", false); File hosts = new File(getFilesDir(), "hosts.txt"); if (!use_hosts || !hosts.exists() || !hosts.canRead()) { Log.i(TAG, "Hosts file use=" + use_hosts + " exists=" + hosts.exists()); lock.writeLock().lock(); mapHostsBlocked.clear(); lock.writeLock().unlock(); return; } boolean changed = (hosts.lastModified() != last_hosts_modified); if (!changed && mapHostsBlocked.size() > 0) { Log.i(TAG, "Hosts file unchanged"); return; } last_hosts_modified = hosts.lastModified(); lock.writeLock().lock(); mapHostsBlocked.clear(); int count = 0; BufferedReader br = null; try { br = new BufferedReader(new FileReader(hosts)); String line; while ((line = br.readLine()) != null) { int hash = line.indexOf('#'); if (hash >= 0) line = line.substring(0, hash); line = line.trim(); if (line.length() > 0) { String[] words = line.split("\\s+"); if (words.length == 2) { count++; mapHostsBlocked.put(words[1], true); } else Log.i(TAG, "Invalid hosts file line: " + line); } } mapHostsBlocked.put("test.netguard.me", true); Log.i(TAG, count + " hosts read"); } catch (IOException ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } finally { if (br != null) try { br.close(); } catch (IOException exex) { Log.e(TAG, exex.toString() + "\n" + Log.getStackTraceString(exex)); } } lock.writeLock().unlock(); } private void prepareUidIPFilters(String dname) { lock.writeLock().lock(); if (dname == null) { mapUidIPFilters.clear(); } Cursor cursor = DatabaseHelper.getInstance(ServiceSinkhole.this).getAccessDns(dname); int colUid = cursor.getColumnIndex("uid"); int colVersion = cursor.getColumnIndex("version"); int colProtocol = cursor.getColumnIndex("protocol"); int colDAddr = cursor.getColumnIndex("daddr"); int colResource = cursor.getColumnIndex("resource"); int colDPort = cursor.getColumnIndex("dport"); int colBlock = cursor.getColumnIndex("block"); int colTime = cursor.getColumnIndex("time"); int colTTL = cursor.getColumnIndex("ttl"); while (cursor.moveToNext()) { int uid = cursor.getInt(colUid); int version = cursor.getInt(colVersion); int protocol = cursor.getInt(colProtocol); String daddr = cursor.getString(colDAddr); String dresource = cursor.getString(colResource); int dport = cursor.getInt(colDPort); boolean block = (cursor.getInt(colBlock) > 0); long time = cursor.getLong(colTime); long ttl = cursor.getLong(colTTL); // long is 64 bits // 0..15 uid // 16..31 dport // 32..39 protocol // 40..43 version if (!(protocol == 6 /* TCP */ || protocol == 17 /* UDP */)) dport = 0; long key = (version << 40) | (protocol << 32) | (dport << 16) | uid; synchronized (mapUidIPFilters) { if (!mapUidIPFilters.containsKey(key)) mapUidIPFilters.put(key, new HashMap()); try { if (dname != null) Log.i(TAG, "Set filter uid=" + uid + " " + daddr + " " + dresource + "/" + dport + "=" + block); String name = (dresource == null ? daddr : dresource); if (Util.isNumericAddress(name)) { InetAddress iname = InetAddress.getByName(name); boolean exists = mapUidIPFilters.get(key).containsKey(iname); if (!exists || !mapUidIPFilters.get(key).get(iname).isBlocked()) { IPRule rule = new IPRule(block, time + ttl); mapUidIPFilters.get(key).put(iname, rule); if (exists) Log.w(TAG, "Address conflict uid=" + uid + " " + daddr + " " + dresource + "/" + dport); } else if (exists) { mapUidIPFilters.get(key).get(iname).updateExpires(time + ttl); Log.w(TAG, "Address updated uid=" + uid + " " + daddr + " " + dresource + "/" + dport); } } else Log.w(TAG, "Address not numeric " + name); } catch (UnknownHostException ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } } cursor.close(); lock.writeLock().unlock(); } private void prepareForwarding() { lock.writeLock().lock(); mapForward.clear(); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); if (prefs.getBoolean("filter", false)) { Cursor cursor = DatabaseHelper.getInstance(ServiceSinkhole.this).getForwarding(); int colProtocol = cursor.getColumnIndex("protocol"); int colDPort = cursor.getColumnIndex("dport"); int colRAddr = cursor.getColumnIndex("raddr"); int colRPort = cursor.getColumnIndex("rport"); int colRUid = cursor.getColumnIndex("ruid"); while (cursor.moveToNext()) { Forward fwd = new Forward(); fwd.protocol = cursor.getInt(colProtocol); fwd.dport = cursor.getInt(colDPort); fwd.raddr = cursor.getString(colRAddr); fwd.rport = cursor.getInt(colRPort); fwd.ruid = cursor.getInt(colRUid); mapForward.put(fwd.dport, fwd); Log.i(TAG, "Forward " + fwd); } cursor.close(); } lock.writeLock().unlock(); } private void prepareNotify(List<Rule> listRule) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); boolean notify = prefs.getBoolean("notify_access", false); boolean system = prefs.getBoolean("manage_system", false); lock.writeLock().lock(); mapNoNotify.clear(); if (notify) for (Rule rule : listRule) if (rule.notify && (system || !rule.system)) mapNoNotify.put(rule.info.applicationInfo.uid, true); lock.writeLock().unlock(); } private List<Rule> getAllowedRules(List<Rule> listRule) { List<Rule> listAllowed = new ArrayList<>(); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); // Check state boolean wifi = Util.isWifiActive(this); boolean metered = Util.isMeteredNetwork(this); boolean useMetered = prefs.getBoolean("use_metered", false); Set<String> ssidHomes = prefs.getStringSet("wifi_homes", new HashSet<String>()); String ssidNetwork = Util.getWifiSSID(this); String generation = Util.getNetworkGeneration(this); boolean unmetered_2g = prefs.getBoolean("unmetered_2g", false); boolean unmetered_3g = prefs.getBoolean("unmetered_3g", false); boolean unmetered_4g = prefs.getBoolean("unmetered_4g", false); boolean roaming = Util.isRoaming(ServiceSinkhole.this); boolean national = prefs.getBoolean("national_roaming", false); boolean tethering = prefs.getBoolean("tethering", false); boolean filter = prefs.getBoolean("filter", false); // Update connected state last_connected = Util.isConnected(ServiceSinkhole.this); boolean org_metered = metered; boolean org_roaming = roaming; // Update metered state if (wifi && !useMetered) metered = false; if (wifi && ssidHomes.size() > 0 && !(ssidHomes.contains(ssidNetwork) || ssidHomes.contains('"' + ssidNetwork + '"'))) { metered = true; Log.i(TAG, "!@home"); } if (unmetered_2g && "2G".equals(generation)) metered = false; if (unmetered_3g && "3G".equals(generation)) metered = false; if (unmetered_4g && "4G".equals(generation)) metered = false; last_metered = metered; // Update roaming state if (roaming && national) roaming = Util.isInternational(this); Log.i(TAG, "Get allowed" + " connected=" + last_connected + " wifi=" + wifi + " home=" + TextUtils.join(",", ssidHomes) + " network=" + ssidNetwork + " metered=" + metered + "/" + org_metered + " generation=" + generation + " roaming=" + roaming + "/" + org_roaming + " interactive=" + last_interactive + " tethering=" + tethering + " filter=" + filter); if (last_connected) for (Rule rule : listRule) { boolean blocked = (metered ? rule.other_blocked : rule.wifi_blocked); boolean screen = (metered ? rule.screen_other : rule.screen_wifi); if ((!blocked || (screen && last_interactive)) && (!metered || !(rule.roaming && roaming))) listAllowed.add(rule); } Log.i(TAG, "Allowed " + listAllowed.size() + " of " + listRule.size()); return listAllowed; } private void stopVPN(ParcelFileDescriptor pfd) { Log.i(TAG, "Stopping"); try { pfd.close(); } catch (IOException ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } } // Called from native code private void nativeExit(String reason) { Log.w(TAG, "Native exit reason=" + reason); if (reason != null) { showErrorNotification(reason); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); prefs.edit().putBoolean("enabled", false).apply(); // Widget.updateWidgets(this); } } // Called from native code private void nativeError(int error, String message) { Log.w(TAG, "Native error " + error + ": " + message); showErrorNotification(message); } // Called from native code // -- send Message containing packets to the LogHandler private void logPacket(Packet packet) { Message msg = logHandler.obtainMessage(); msg.obj = packet; msg.what = MSG_PACKET; msg.arg1 = (last_connected ? (last_metered ? 2 : 1) : 0); msg.arg2 = (last_interactive ? 1 : 0); logHandler.sendMessage(msg); } // Called from native code private void dnsResolved(ResourceRecord rr) { if (DatabaseHelper.getInstance(ServiceSinkhole.this).insertDns(rr)) { Log.i(TAG, "New IP " + rr); prepareUidIPFilters(rr.QName); } } // Called from native code private boolean isDomainBlocked(String name) { lock.readLock().lock(); boolean blocked = (mapHostsBlocked.containsKey(name) && mapHostsBlocked.get(name)); lock.readLock().unlock(); return blocked; } private boolean isSupported(int protocol) { return (protocol == 1 /* ICMPv4 */ || protocol == 59 /* ICMPv6 */ || protocol == 6 /* TCP */ || protocol == 17 /* UDP */); } // Called from native code private Allowed isAddressAllowed(Packet packet) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); lock.readLock().lock(); packet.allowed = false; if (prefs.getBoolean("filter", false)) { // https://android.googlesource.com/platform/system/core/+/master/include/private/android_filesystem_config.h if (packet.uid < 2000 && !last_connected && isSupported(packet.protocol)) { // Allow system applications in disconnected state packet.allowed = true; Log.w(TAG, "Allowing disconnected system " + packet); } else if (packet.uid < 2000 && !mapUidKnown.containsKey(packet.uid) && isSupported(packet.protocol)) { // Allow unknown system traffic packet.allowed = true; Log.w(TAG, "Allowing unknown system " + packet); } else { boolean filtered = false; // Only TCP (6) and UDP (17) have port numbers int dport = (packet.protocol == 6 || packet.protocol == 17 ? packet.dport : 0); long key = (packet.version << 40) | (packet.protocol << 32) | (dport << 16) | packet.uid; if (mapUidIPFilters.containsKey(key)) try { InetAddress iaddr = InetAddress.getByName(packet.daddr); Map<InetAddress, IPRule> map = mapUidIPFilters.get(key); if (map != null && map.containsKey(iaddr)) { IPRule rule = map.get(iaddr); if (rule.isExpired()) Log.i(TAG, "DNS expired " + packet); else { filtered = true; packet.allowed = !rule.isBlocked(); Log.i(TAG, "Filtering " + packet); } } } catch (UnknownHostException ex) { Log.w(TAG, "Allowed " + ex.toString() + "\n" + Log.getStackTraceString(ex)); } if (!filtered) packet.allowed = (mapUidAllowed.containsKey(packet.uid) && mapUidAllowed.get(packet.uid)); } } Allowed allowed = null; if (packet.allowed) { if (mapForward.containsKey(packet.dport)) { Forward fwd = mapForward.get(packet.dport); if (fwd.ruid == packet.uid) { allowed = new Allowed(); } else { allowed = new Allowed(fwd.raddr, fwd.rport); packet.data = "> " + fwd.raddr + "/" + fwd.rport; } } else allowed = new Allowed(); } lock.readLock().unlock(); if (prefs.getBoolean("log", false) || prefs.getBoolean("log_app", false)) logPacket(packet); return allowed; } // Called from native code private void accountUsage(Usage usage) { Message msg = logHandler.obtainMessage(); msg.obj = usage; msg.what = MSG_USAGE; logHandler.sendMessage(msg); } private BroadcastReceiver interactiveStateReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.i(TAG, "Received " + intent); Util.logExtras(intent); // Check if rules needs to be reloaded boolean process = false; List<Rule> listRule = Rule.getRules(true, ServiceSinkhole.this); for (Rule rule : listRule) { boolean blocked = (last_metered ? rule.other_blocked : rule.wifi_blocked); boolean screen = (last_metered ? rule.screen_other : rule.screen_wifi); if (blocked && screen) { process = true; break; } } if (!process) { Log.i(TAG, "No changed rules on interactive state change"); return; } SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); int delay = Integer.parseInt(prefs.getString("screen_delay", "0")); boolean interactive = Intent.ACTION_SCREEN_ON.equals(intent.getAction()); AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); PendingIntent pi = PendingIntent.getBroadcast(context, 0, new Intent(ACTION_SCREEN_OFF_DELAYED), PendingIntent.FLAG_UPDATE_CURRENT); am.cancel(pi); if (interactive || delay == 0) { last_interactive = interactive; reload("interactive state changed", ServiceSinkhole.this); } else { if (ACTION_SCREEN_OFF_DELAYED.equals(intent.getAction())) { last_interactive = interactive; reload("interactive state changed", ServiceSinkhole.this); } else { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) am.set(AlarmManager.RTC_WAKEUP, new Date().getTime() + delay * 60 * 1000L, pi); else am.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, new Date().getTime() + delay * 60 * 1000L, pi); } } // Start/stop stats statsHandler.sendEmptyMessage( Util.isInteractive(ServiceSinkhole.this) && !powersaving ? MSG_STATS_START : MSG_STATS_STOP); } }; private BroadcastReceiver powerSaveReceiver = new BroadcastReceiver() { @Override @TargetApi(Build.VERSION_CODES.LOLLIPOP) public void onReceive(Context context, Intent intent) { Log.i(TAG, "Received " + intent); Util.logExtras(intent); PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); powersaving = pm.isPowerSaveMode(); Log.i(TAG, "Power saving=" + powersaving); statsHandler.sendEmptyMessage( Util.isInteractive(ServiceSinkhole.this) && !powersaving ? MSG_STATS_START : MSG_STATS_STOP); } }; private BroadcastReceiver userReceiver = new BroadcastReceiver() { @Override @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1) public void onReceive(Context context, Intent intent) { Log.i(TAG, "Received " + intent); Util.logExtras(intent); user_foreground = Intent.ACTION_USER_FOREGROUND.equals(intent.getAction()); Log.i(TAG, "User foreground=" + user_foreground + " user=" + (Process.myUid() / 100000)); if (user_foreground) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); if (prefs.getBoolean("enabled", false)) { // Allow service of background user to stop try { Thread.sleep(3000); } catch (InterruptedException ignored) { } start("foreground", ServiceSinkhole.this); } } else stop("background", ServiceSinkhole.this); } }; private BroadcastReceiver idleStateReceiver = new BroadcastReceiver() { @Override @TargetApi(Build.VERSION_CODES.M) public void onReceive(Context context, Intent intent) { Log.i(TAG, "Received " + intent); Util.logExtras(intent); PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); Log.i(TAG, "device idle=" + pm.isDeviceIdleMode()); // Reload rules when coming from idle mode if (!pm.isDeviceIdleMode()) reload("idle state changed", ServiceSinkhole.this); } }; private BroadcastReceiver connectivityChangedReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { // Filter VPN connectivity changes if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { int networkType = intent.getIntExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_DUMMY); if (networkType == ConnectivityManager.TYPE_VPN) return; } // Reload rules Log.i(TAG, "Received " + intent); Util.logExtras(intent); reload("connectivity changed", ServiceSinkhole.this); } }; private BroadcastReceiver packageAddedReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.i(TAG, "Received " + intent); Util.logExtras(intent); Rule.clearCache(ServiceSinkhole.this); reload("package added", ServiceSinkhole.this); } }; private PhoneStateListener phoneStateListener = new PhoneStateListener() { private String last_generation = null; private int last_international = -1; @Override public void onDataConnectionStateChanged(int state, int networkType) { if (state == TelephonyManager.DATA_CONNECTED) { String current_generation = Util.getNetworkGeneration(ServiceSinkhole.this); Log.i(TAG, "Data connected generation=" + current_generation); if (last_generation == null || !last_generation.equals(current_generation)) { Log.i(TAG, "New network generation=" + current_generation); last_generation = current_generation; SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); if (prefs.getBoolean("unmetered_2g", false) || prefs.getBoolean("unmetered_3g", false) || prefs.getBoolean("unmetered_4g", false)) reload("data connection state changed", ServiceSinkhole.this); } } } @Override public void onServiceStateChanged(ServiceState serviceState) { if (serviceState.getState() == ServiceState.STATE_IN_SERVICE) { int current_international = (Util.isInternational(ServiceSinkhole.this) ? 1 : 0); Log.i(TAG, "In service international=" + current_international); if (last_international != current_international) { Log.i(TAG, "New international=" + current_international); last_international = current_international; SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); if (prefs.getBoolean("national_roaming", false)) reload("service state changed", ServiceSinkhole.this); } } } }; @Override public void onCreate() { Log.i(TAG, "Create version=" + Util.getSelfVersionName(this) + "/" + Util.getSelfVersionCode(this)); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); // Native init jni_init(); boolean pcap = prefs.getBoolean("pcap", false); setPcap(pcap, this); prefs.registerOnSharedPreferenceChangeListener(this); Util.setTheme(this); super.onCreate(); HandlerThread commandThread = new HandlerThread(getString(R.string.app_name) + " command", Process.THREAD_PRIORITY_FOREGROUND); HandlerThread logThread = new HandlerThread(getString(R.string.app_name) + " log", Process.THREAD_PRIORITY_BACKGROUND); HandlerThread statsThread = new HandlerThread(getString(R.string.app_name) + " stats", Process.THREAD_PRIORITY_BACKGROUND); commandThread.start(); logThread.start(); statsThread.start(); commandLooper = commandThread.getLooper(); logLooper = logThread.getLooper(); statsLooper = statsThread.getLooper(); commandHandler = new CommandHandler(commandLooper); logHandler = new LogHandler(logLooper); statsHandler = new StatsHandler(statsLooper); // Listen for power save mode if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && !Util.isPlayStoreInstall(this)) { PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE); powersaving = pm.isPowerSaveMode(); IntentFilter ifPower = new IntentFilter(); ifPower.addAction(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED); registerReceiver(powerSaveReceiver, ifPower); registeredPowerSave = true; } // Listen for user switches if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { IntentFilter ifUser = new IntentFilter(); ifUser.addAction(Intent.ACTION_USER_BACKGROUND); ifUser.addAction(Intent.ACTION_USER_FOREGROUND); registerReceiver(userReceiver, ifUser); registeredUser = true; } if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { // Listen for idle mode state changes IntentFilter ifIdle = new IntentFilter(); ifIdle.addAction(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED); registerReceiver(idleStateReceiver, ifIdle); registeredIdleState = true; } // Listen for connectivity updates IntentFilter ifConnectivity = new IntentFilter(); ifConnectivity.addAction(ConnectivityManager.CONNECTIVITY_ACTION); registerReceiver(connectivityChangedReceiver, ifConnectivity); registeredConnectivityChanged = true; // Listen for added applications IntentFilter ifPackage = new IntentFilter(); ifPackage.addAction(Intent.ACTION_PACKAGE_ADDED); ifPackage.addDataScheme("package"); registerReceiver(packageAddedReceiver, ifPackage); registeredPackageAdded = true; // Setup house holding Intent alarmIntent = new Intent(this, ServiceSinkhole.class); alarmIntent.setAction(ACTION_HOUSE_HOLDING); PendingIntent pi = PendingIntent.getService(this, 0, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT); AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE); am.setInexactRepeating(AlarmManager.RTC, SystemClock.elapsedRealtime() + 60 * 1000, AlarmManager.INTERVAL_HALF_DAY, pi); } @Override public void onSharedPreferenceChanged(SharedPreferences prefs, String name) { if ("theme".equals(name)) { Log.i(TAG, "Theme changed"); Util.setTheme(this); if (state != State.none) { Log.d(TAG, "Stop foreground state=" + state.toString()); stopForeground(true); } if (state == State.enforcing) startForeground(NOTIFY_ENFORCING, getEnforcingNotification(0, 0, 0)); else if (state != State.none) startForeground(NOTIFY_WAITING, getWaitingNotification()); Log.d(TAG, "Start foreground state=" + state.toString()); } } @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.i(TAG, "Received " + intent); Util.logExtras(intent); // Check for set command if (intent != null && intent.hasExtra(EXTRA_COMMAND) && intent.getSerializableExtra(EXTRA_COMMAND) == Command.set) { set(intent); return START_STICKY; } // Keep awake getLock(this).acquire(); // Get state SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); boolean enabled = prefs.getBoolean("enabled", false); // Handle service restart if (intent == null) { Log.i(TAG, "Restart"); // Recreate intent intent = new Intent(this, ServiceSinkhole.class); intent.putExtra(EXTRA_COMMAND, enabled ? Command.start : Command.stop); } if (ACTION_HOUSE_HOLDING.equals(intent.getAction())) intent.putExtra(EXTRA_COMMAND, Command.householding); if (ACTION_WATCHDOG.equals(intent.getAction())) intent.putExtra(EXTRA_COMMAND, Command.watchdog); Command cmd = (Command) intent.getSerializableExtra(EXTRA_COMMAND); if (cmd == null) intent.putExtra(EXTRA_COMMAND, enabled ? Command.start : Command.stop); String reason = intent.getStringExtra(EXTRA_REASON); Log.i(TAG, "Start intent=" + intent + " command=" + cmd + " reason=" + reason + " vpn=" + (vpn != null) + " user=" + (Process.myUid() / 100000)); commandHandler.queue(intent); return START_STICKY; } private void set(Intent intent) { // Get arguments int uid = intent.getIntExtra(EXTRA_UID, 0); String network = intent.getStringExtra(EXTRA_NETWORK); String pkg = intent.getStringExtra(EXTRA_PACKAGE); boolean blocked = intent.getBooleanExtra(EXTRA_BLOCKED, false); Log.i(TAG, "Set " + pkg + " " + network + "=" + blocked); // Get defaults SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(ServiceSinkhole.this); boolean default_wifi = settings.getBoolean("whitelist_wifi", true); boolean default_other = settings.getBoolean("whitelist_other", true); // Update setting SharedPreferences prefs = getSharedPreferences(network, Context.MODE_PRIVATE); if (blocked == ("wifi".equals(network) ? default_wifi : default_other)) prefs.edit().remove(pkg).apply(); else prefs.edit().putBoolean(pkg, blocked).apply(); // Apply rules ServiceSinkhole.reload("notification", ServiceSinkhole.this); // Update notification Receiver.notifyNewApplication(uid, ServiceSinkhole.this); // Update UI Intent ruleset = new Intent(MainActivity.ACTION_RULES_CHANGED); LocalBroadcastManager.getInstance(ServiceSinkhole.this).sendBroadcast(ruleset); } @Override public void onRevoke() { Log.i(TAG, "Revoke"); // Disable firewall (will result in stop command) SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); prefs.edit().putBoolean("enabled", false).apply(); // Feedback showDisabledNotification(); // Widget.updateWidgets(this); super.onRevoke(); } @Override public void onDestroy() { Log.i(TAG, "Destroy"); commandLooper.quit(); logLooper.quit(); statsLooper.quit(); if (registeredInteractiveState) { unregisterReceiver(interactiveStateReceiver); registeredInteractiveState = false; } if (registeredPowerSave) { unregisterReceiver(powerSaveReceiver); registeredPowerSave = false; } if (registeredUser) { unregisterReceiver(userReceiver); registeredUser = false; } if (registeredIdleState) { unregisterReceiver(idleStateReceiver); registeredIdleState = false; } if (registeredConnectivityChanged) { unregisterReceiver(connectivityChangedReceiver); registeredConnectivityChanged = false; } if (registeredPackageAdded) { unregisterReceiver(packageAddedReceiver); registeredPackageAdded = false; } if (phone_state) { TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); if (tm != null) { tm.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE); phone_state = false; } } if (subscriptionsChangedListener != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) { SubscriptionManager sm = SubscriptionManager.from(this); sm.removeOnSubscriptionsChangedListener( (SubscriptionManager.OnSubscriptionsChangedListener) subscriptionsChangedListener); subscriptionsChangedListener = null; } try { if (vpn != null) { stopNative(vpn, true); stopVPN(vpn); vpn = null; unprepare(); } } catch (Throwable ex) { Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex)); } jni_done(); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); prefs.unregisterOnSharedPreferenceChangeListener(this); super.onDestroy(); } private Notification getEnforcingNotification(int allowed, int blocked, int hosts) { Intent main = new Intent(this, MainActivity.class); PendingIntent pi = PendingIntent.getActivity(this, 0, main, PendingIntent.FLAG_UPDATE_CURRENT); TypedValue tv = new TypedValue(); getTheme().resolveAttribute(R.attr.colorPrimary, tv, true); NotificationCompat.Builder builder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_security_white_24dp).setContentIntent(pi).setColor(tv.data) .setOngoing(true).setAutoCancel(false); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) builder.setContentTitle(getString(R.string.msg_started)); else builder.setContentTitle(getString(R.string.app_name)).setContentText(getString(R.string.msg_started)); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setCategory(Notification.CATEGORY_STATUS).setVisibility(Notification.VISIBILITY_SECRET) .setPriority(Notification.PRIORITY_MIN); } if (allowed > 0 || blocked > 0 || hosts > 0) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { if (Util.isPlayStoreInstall(this)) builder.setContentText(getString(R.string.msg_packages, allowed, blocked)); else builder.setContentText(getString(R.string.msg_hosts, allowed, blocked, hosts)); return builder.build(); } else { NotificationCompat.BigTextStyle notification = new NotificationCompat.BigTextStyle(builder); notification.bigText(getString(R.string.msg_started)); if (Util.isPlayStoreInstall(this)) notification.setSummaryText(getString(R.string.msg_packages, allowed, blocked)); else notification.setSummaryText(getString(R.string.msg_hosts, allowed, blocked, hosts)); return notification.build(); } } else return builder.build(); } private void updateEnforcingNotification(int allowed, int total) { // Update notification Notification notification = getEnforcingNotification(allowed, total - allowed, mapHostsBlocked.size()); NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); nm.notify(NOTIFY_ENFORCING, notification); } private Notification getWaitingNotification() { Intent main = new Intent(this, MainActivity.class); PendingIntent pi = PendingIntent.getActivity(this, 0, main, PendingIntent.FLAG_UPDATE_CURRENT); TypedValue tv = new TypedValue(); getTheme().resolveAttribute(R.attr.colorPrimary, tv, true); NotificationCompat.Builder builder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_security_white_24dp).setContentIntent(pi).setColor(tv.data) .setOngoing(true).setAutoCancel(false); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) builder.setContentTitle(getString(R.string.msg_waiting)); else builder.setContentTitle(getString(R.string.app_name)).setContentText(getString(R.string.msg_waiting)); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setCategory(Notification.CATEGORY_STATUS).setVisibility(Notification.VISIBILITY_SECRET) .setPriority(Notification.PRIORITY_MIN); } return builder.build(); } private void showDisabledNotification() { Intent main = new Intent(this, MainActivity.class); PendingIntent pi = PendingIntent.getActivity(this, 0, main, PendingIntent.FLAG_UPDATE_CURRENT); TypedValue tv = new TypedValue(); getTheme().resolveAttribute(R.attr.colorOff, tv, true); NotificationCompat.Builder builder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_error_white_24dp).setContentTitle(getString(R.string.app_name)) .setContentText(getString(R.string.msg_revoked)).setContentIntent(pi).setColor(tv.data) .setOngoing(false).setAutoCancel(true); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setCategory(Notification.CATEGORY_STATUS).setVisibility(Notification.VISIBILITY_SECRET); } NotificationCompat.BigTextStyle notification = new NotificationCompat.BigTextStyle(builder); notification.bigText(getString(R.string.msg_revoked)); NotificationManagerCompat.from(this).notify(NOTIFY_DISABLED, notification.build()); } private void showAutoStartNotification() { Intent main = new Intent(this, MainActivity.class); main.putExtra(MainActivity.EXTRA_APPROVE, true); PendingIntent pi = PendingIntent.getActivity(this, NOTIFY_AUTOSTART, main, PendingIntent.FLAG_UPDATE_CURRENT); TypedValue tv = new TypedValue(); getTheme().resolveAttribute(R.attr.colorOff, tv, true); NotificationCompat.Builder builder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_error_white_24dp).setContentTitle(getString(R.string.app_name)) .setContentText(getString(R.string.msg_autostart)).setContentIntent(pi).setColor(tv.data) .setOngoing(false).setAutoCancel(true); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setCategory(Notification.CATEGORY_STATUS).setVisibility(Notification.VISIBILITY_SECRET); } NotificationCompat.BigTextStyle notification = new NotificationCompat.BigTextStyle(builder); notification.bigText(getString(R.string.msg_autostart)); NotificationManagerCompat.from(this).notify(NOTIFY_AUTOSTART, notification.build()); } private void showErrorNotification(String message) { Intent main = new Intent(this, MainActivity.class); PendingIntent pi = PendingIntent.getActivity(this, 0, main, PendingIntent.FLAG_UPDATE_CURRENT); TypedValue tv = new TypedValue(); getTheme().resolveAttribute(R.attr.colorOff, tv, true); NotificationCompat.Builder builder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_error_white_24dp).setContentTitle(getString(R.string.app_name)) .setContentText(getString(R.string.msg_error, message)).setContentIntent(pi).setColor(tv.data) .setOngoing(false).setAutoCancel(true); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setCategory(Notification.CATEGORY_STATUS).setVisibility(Notification.VISIBILITY_SECRET); } NotificationCompat.BigTextStyle notification = new NotificationCompat.BigTextStyle(builder); notification.bigText(getString(R.string.msg_error, message)); notification.setSummaryText(message); NotificationManagerCompat.from(this).notify(NOTIFY_ERROR, notification.build()); } private void showAccessNotification(int uid) { String name = TextUtils.join(", ", Util.getApplicationNames(uid, ServiceSinkhole.this)); Intent main = new Intent(ServiceSinkhole.this, MainActivity.class); main.putExtra(MainActivity.EXTRA_SEARCH, Integer.toString(uid)); PendingIntent pi = PendingIntent.getActivity(ServiceSinkhole.this, uid + 10000, main, PendingIntent.FLAG_UPDATE_CURRENT); TypedValue tv = new TypedValue(); getTheme().resolveAttribute(R.attr.colorOn, tv, true); int colorOn = tv.data; getTheme().resolveAttribute(R.attr.colorOff, tv, true); int colorOff = tv.data; NotificationCompat.Builder builder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_cloud_upload_white_24dp).setGroup("AccessAttempt").setContentIntent(pi) .setColor(colorOff).setOngoing(false).setAutoCancel(true); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) builder.setContentTitle(name).setContentText(getString(R.string.msg_access_n)); else builder.setContentTitle(getString(R.string.app_name)) .setContentText(getString(R.string.msg_access, name)); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setCategory(Notification.CATEGORY_STATUS).setVisibility(Notification.VISIBILITY_SECRET); } DateFormat df = new SimpleDateFormat("dd HH:mm"); NotificationCompat.InboxStyle notification = new NotificationCompat.InboxStyle(builder); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) notification.addLine(getString(R.string.msg_access_n)); else { String sname = getString(R.string.msg_access, name); int pos = sname.indexOf(name); Spannable sp = new SpannableString(sname); sp.setSpan(new StyleSpan(Typeface.BOLD), pos, pos + name.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); notification.addLine(sp); } Cursor cursor = DatabaseHelper.getInstance(ServiceSinkhole.this).getAccessUnset(uid, 7); int colDAddr = cursor.getColumnIndex("daddr"); int colTime = cursor.getColumnIndex("time"); int colAllowed = cursor.getColumnIndex("allowed"); while (cursor.moveToNext()) { StringBuilder sb = new StringBuilder(); sb.append(df.format(cursor.getLong(colTime))).append(' '); String daddr = cursor.getString(colDAddr); if (Util.isNumericAddress(daddr)) try { daddr = InetAddress.getByName(daddr).getHostName(); } catch (UnknownHostException ignored) { } sb.append(daddr); int allowed = cursor.getInt(colAllowed); if (allowed >= 0) { int pos = sb.indexOf(daddr); Spannable sp = new SpannableString(sb); ForegroundColorSpan fgsp = new ForegroundColorSpan(allowed > 0 ? colorOn : colorOff); sp.setSpan(fgsp, pos, pos + daddr.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); notification.addLine(sp); } else notification.addLine(sb); } cursor.close(); NotificationManagerCompat.from(this).notify(uid + 10000, notification.build()); } private void showUpdateNotification(String name, String url) { Intent download = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); PendingIntent pi = PendingIntent.getActivity(this, 0, download, PendingIntent.FLAG_UPDATE_CURRENT); TypedValue tv = new TypedValue(); getTheme().resolveAttribute(R.attr.colorPrimary, tv, true); NotificationCompat.Builder builder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_security_white_24dp).setContentTitle(getString(R.string.app_name)) .setContentText(getString(R.string.msg_update)).setContentIntent(pi).setColor(tv.data) .setOngoing(false).setAutoCancel(true); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setCategory(Notification.CATEGORY_STATUS).setVisibility(Notification.VISIBILITY_SECRET); } NotificationCompat.BigTextStyle notification = new NotificationCompat.BigTextStyle(builder); notification.bigText(getString(R.string.msg_update)); notification.setSummaryText(name); NotificationManagerCompat.from(this).notify(NOTIFY_UPDATE, notification.build()); } private void removeWarningNotifications() { NotificationManagerCompat.from(this).cancel(NOTIFY_DISABLED); NotificationManagerCompat.from(this).cancel(NOTIFY_AUTOSTART); NotificationManagerCompat.from(this).cancel(NOTIFY_ERROR); } private class Builder extends VpnService.Builder { private NetworkInfo networkInfo; private int mtu; private List<String> listAddress = new ArrayList<>(); private List<String> listRoute = new ArrayList<>(); private List<InetAddress> listDns = new ArrayList<>(); private List<String> listDisallowed = new ArrayList<>(); private Builder() { super(); ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); networkInfo = cm.getActiveNetworkInfo(); } @Override public VpnService.Builder setMtu(int mtu) { this.mtu = mtu; super.setMtu(mtu); return this; } @Override public Builder addAddress(String address, int prefixLength) { listAddress.add(address + "/" + prefixLength); super.addAddress(address, prefixLength); return this; } @Override public Builder addRoute(String address, int prefixLength) { listRoute.add(address + "/" + prefixLength); super.addRoute(address, prefixLength); return this; } @Override public Builder addDnsServer(InetAddress address) { listDns.add(address); super.addDnsServer(address); return this; } @Override public Builder addDisallowedApplication(String packageName) throws PackageManager.NameNotFoundException { listDisallowed.add(packageName); super.addDisallowedApplication(packageName); return this; } @Override public boolean equals(Object obj) { Builder other = (Builder) obj; if (other == null) return false; if (this.networkInfo == null || other.networkInfo == null || this.networkInfo.getType() != other.networkInfo.getType()) return false; if (this.mtu != other.mtu) return false; if (this.listAddress.size() != other.listAddress.size()) return false; if (this.listRoute.size() != other.listRoute.size()) return false; if (this.listDns.size() != other.listDns.size()) return false; if (this.listDisallowed.size() != other.listDisallowed.size()) return false; for (String address : this.listAddress) if (!other.listAddress.contains(address)) return false; for (String route : this.listRoute) if (!other.listRoute.contains(route)) return false; for (InetAddress dns : this.listDns) if (!other.listDns.contains(dns)) return false; for (String pkg : this.listDisallowed) if (!other.listDisallowed.contains(pkg)) return false; return true; } } private class IPRule { private boolean block; private long expires; public IPRule(boolean block, long expires) { this.block = block; this.expires = expires; } public boolean isBlocked() { return this.block; } public boolean isExpired() { return System.currentTimeMillis() > this.expires; } public void updateExpires(long expires) { this.expires = Math.max(this.expires, expires); } @Override public boolean equals(Object obj) { IPRule other = (IPRule) obj; return (this.block == other.block && this.expires == other.expires); } } public static void run(String reason, Context context) { Intent intent = new Intent(context, ServiceSinkhole.class); intent.putExtra(EXTRA_COMMAND, Command.run); intent.putExtra(EXTRA_REASON, reason); context.startService(intent); } public static void start(String reason, Context context) { Intent intent = new Intent(context, ServiceSinkhole.class); intent.putExtra(EXTRA_COMMAND, Command.start); intent.putExtra(EXTRA_REASON, reason); context.startService(intent); } public static void reload(String reason, Context context) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); if (prefs.getBoolean("enabled", false)) { Intent intent = new Intent(context, ServiceSinkhole.class); intent.putExtra(EXTRA_COMMAND, Command.reload); intent.putExtra(EXTRA_REASON, reason); context.startService(intent); } } public static void stop(String reason, Context context) { Intent intent = new Intent(context, ServiceSinkhole.class); intent.putExtra(EXTRA_COMMAND, Command.stop); intent.putExtra(EXTRA_REASON, reason); context.startService(intent); } public static void reloadStats(String reason, Context context) { Intent intent = new Intent(context, ServiceSinkhole.class); intent.putExtra(EXTRA_COMMAND, Command.stats); intent.putExtra(EXTRA_REASON, reason); context.startService(intent); } }