WifiServiceImpl.java revision 3e954f2804d376c9ca08e23c00b266c668f65e53 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.server.wifi;
18
19import static com.android.server.wifi.WifiController.CMD_AIRPLANE_TOGGLED;
20import static com.android.server.wifi.WifiController.CMD_BATTERY_CHANGED;
21import static com.android.server.wifi.WifiController.CMD_EMERGENCY_CALL_STATE_CHANGED;
22import static com.android.server.wifi.WifiController.CMD_EMERGENCY_MODE_CHANGED;
23import static com.android.server.wifi.WifiController.CMD_LOCKS_CHANGED;
24import static com.android.server.wifi.WifiController.CMD_SCAN_ALWAYS_MODE_CHANGED;
25import static com.android.server.wifi.WifiController.CMD_SCREEN_OFF;
26import static com.android.server.wifi.WifiController.CMD_SCREEN_ON;
27import static com.android.server.wifi.WifiController.CMD_SET_AP;
28import static com.android.server.wifi.WifiController.CMD_USER_PRESENT;
29import static com.android.server.wifi.WifiController.CMD_WIFI_TOGGLED;
30
31import android.Manifest;
32import android.app.ActivityManager;
33import android.app.AppOpsManager;
34import android.bluetooth.BluetoothAdapter;
35import android.content.BroadcastReceiver;
36import android.content.Context;
37import android.content.Intent;
38import android.content.IntentFilter;
39import android.content.pm.PackageManager;
40import android.content.pm.UserInfo;
41import android.database.ContentObserver;
42import android.net.ConnectivityManager;
43import android.net.ip.IpManager;
44import android.net.DhcpInfo;
45import android.net.DhcpResults;
46import android.net.Network;
47import android.net.NetworkScorerAppManager;
48import android.net.NetworkUtils;
49import android.net.Uri;
50import android.net.wifi.IWifiManager;
51import android.net.wifi.PasspointManagementObjectDefinition;
52import android.net.wifi.ScanResult;
53import android.net.wifi.ScanSettings;
54import android.net.wifi.WifiActivityEnergyInfo;
55import android.net.wifi.WifiConfiguration;
56import android.net.wifi.WifiConnectionStatistics;
57import android.net.wifi.WifiEnterpriseConfig;
58import android.net.wifi.WifiInfo;
59import android.net.wifi.WifiLinkLayerStats;
60import android.net.wifi.WifiManager;
61import android.os.AsyncTask;
62import android.os.Binder;
63import android.os.Build;
64import android.os.Handler;
65import android.os.HandlerThread;
66import android.os.IBinder;
67import android.os.Looper;
68import android.os.Message;
69import android.os.Messenger;
70import android.os.PowerManager;
71import android.os.RemoteException;
72import android.os.SystemClock;
73import android.os.SystemProperties;
74import android.os.UserHandle;
75import android.os.UserManager;
76import android.os.WorkSource;
77import android.provider.Settings;
78import android.text.TextUtils;
79import android.util.Log;
80import android.util.Slog;
81
82import com.android.internal.R;
83import com.android.internal.app.IBatteryStats;
84import com.android.internal.telephony.IccCardConstants;
85import com.android.internal.telephony.PhoneConstants;
86import com.android.internal.telephony.TelephonyIntents;
87import com.android.internal.util.AsyncChannel;
88import com.android.server.am.BatteryStatsService;
89import com.android.server.wifi.configparse.ConfigBuilder;
90
91import org.xml.sax.SAXException;
92
93import java.io.BufferedReader;
94import java.io.FileDescriptor;
95import java.io.FileNotFoundException;
96import java.io.FileReader;
97import java.io.IOException;
98import java.io.PrintWriter;
99import java.net.Inet4Address;
100import java.net.InetAddress;
101import java.security.GeneralSecurityException;
102import java.security.KeyStore;
103import java.security.cert.CertPath;
104import java.security.cert.CertPathValidator;
105import java.security.cert.CertPathValidatorException;
106import java.security.cert.CertificateFactory;
107import java.security.cert.PKIXParameters;
108import java.security.cert.X509Certificate;
109import java.util.ArrayList;
110import java.util.Arrays;
111import java.util.List;
112
113/**
114 * WifiService handles remote WiFi operation requests by implementing
115 * the IWifiManager interface.
116 *
117 * @hide
118 */
119public class WifiServiceImpl extends IWifiManager.Stub {
120    private static final String TAG = "WifiService";
121    private static final boolean DBG = true;
122    private static final boolean VDBG = false;
123    private static final String BOOT_DEFAULT_WIFI_COUNTRY_CODE = "ro.boot.wificountrycode";
124
125    final WifiStateMachine mWifiStateMachine;
126
127    private final Context mContext;
128
129    final LockList mLocks = new LockList();
130    // some wifi lock statistics
131    private int mFullHighPerfLocksAcquired;
132    private int mFullHighPerfLocksReleased;
133    private int mFullLocksAcquired;
134    private int mFullLocksReleased;
135    private int mScanLocksAcquired;
136    private int mScanLocksReleased;
137
138    private final List<Multicaster> mMulticasters =
139            new ArrayList<Multicaster>();
140    private int mMulticastEnabled;
141    private int mMulticastDisabled;
142
143    private final IBatteryStats mBatteryStats;
144    private final PowerManager mPowerManager;
145    private final AppOpsManager mAppOps;
146    private final UserManager mUserManager;
147    private final WifiCountryCode mCountryCode;
148    // Debug counter tracking scan requests sent by WifiManager
149    private int scanRequestCounter = 0;
150
151    /* Tracks the open wi-fi network notification */
152    private WifiNotificationController mNotificationController;
153    /* Polls traffic stats and notifies clients */
154    private WifiTrafficPoller mTrafficPoller;
155    /* Tracks the persisted states for wi-fi & airplane mode */
156    final WifiSettingsStore mSettingsStore;
157    /* Logs connection events and some general router and scan stats */
158    private final WifiMetrics mWifiMetrics;
159    /* Manages affiliated certificates for current user */
160    private final WifiCertManager mCertManager;
161
162    private final WifiInjector mWifiInjector;
163    /**
164     * Asynchronous channel to WifiStateMachine
165     */
166    private AsyncChannel mWifiStateMachineChannel;
167
168    /**
169     * Handles client connections
170     */
171    private class ClientHandler extends Handler {
172
173        ClientHandler(Looper looper) {
174            super(looper);
175        }
176
177        @Override
178        public void handleMessage(Message msg) {
179            switch (msg.what) {
180                case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: {
181                    if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
182                        if (DBG) Slog.d(TAG, "New client listening to asynchronous messages");
183                        // We track the clients by the Messenger
184                        // since it is expected to be always available
185                        mTrafficPoller.addClient(msg.replyTo);
186                    } else {
187                        Slog.e(TAG, "Client connection failure, error=" + msg.arg1);
188                    }
189                    break;
190                }
191                case AsyncChannel.CMD_CHANNEL_DISCONNECTED: {
192                    if (msg.arg1 == AsyncChannel.STATUS_SEND_UNSUCCESSFUL) {
193                        if (DBG) Slog.d(TAG, "Send failed, client connection lost");
194                    } else {
195                        if (DBG) Slog.d(TAG, "Client connection lost with reason: " + msg.arg1);
196                    }
197                    mTrafficPoller.removeClient(msg.replyTo);
198                    break;
199                }
200                case AsyncChannel.CMD_CHANNEL_FULL_CONNECTION: {
201                    AsyncChannel ac = new AsyncChannel();
202                    ac.connect(mContext, this, msg.replyTo);
203                    break;
204                }
205                /* Client commands are forwarded to state machine */
206                case WifiManager.CONNECT_NETWORK:
207                case WifiManager.SAVE_NETWORK: {
208                    WifiConfiguration config = (WifiConfiguration) msg.obj;
209                    int networkId = msg.arg1;
210                    if (msg.what == WifiManager.SAVE_NETWORK) {
211                        Slog.d("WiFiServiceImpl ", "SAVE"
212                                + " nid=" + Integer.toString(networkId)
213                                + " uid=" + msg.sendingUid
214                                + " name="
215                                + mContext.getPackageManager().getNameForUid(msg.sendingUid));
216                    }
217                    if (msg.what == WifiManager.CONNECT_NETWORK) {
218                        Slog.d("WiFiServiceImpl ", "CONNECT "
219                                + " nid=" + Integer.toString(networkId)
220                                + " uid=" + msg.sendingUid
221                                + " name="
222                                + mContext.getPackageManager().getNameForUid(msg.sendingUid));
223                    }
224
225                    if (config != null && isValid(config)) {
226                        if (DBG) Slog.d(TAG, "Connect with config" + config);
227                        mWifiStateMachine.sendMessage(Message.obtain(msg));
228                    } else if (config == null
229                            && networkId != WifiConfiguration.INVALID_NETWORK_ID) {
230                        if (DBG) Slog.d(TAG, "Connect with networkId" + networkId);
231                        mWifiStateMachine.sendMessage(Message.obtain(msg));
232                    } else {
233                        Slog.e(TAG, "ClientHandler.handleMessage ignoring invalid msg=" + msg);
234                        if (msg.what == WifiManager.CONNECT_NETWORK) {
235                            replyFailed(msg, WifiManager.CONNECT_NETWORK_FAILED,
236                                    WifiManager.INVALID_ARGS);
237                        } else {
238                            replyFailed(msg, WifiManager.SAVE_NETWORK_FAILED,
239                                    WifiManager.INVALID_ARGS);
240                        }
241                    }
242                    break;
243                }
244                case WifiManager.FORGET_NETWORK:
245                    mWifiStateMachine.sendMessage(Message.obtain(msg));
246                    break;
247                case WifiManager.START_WPS:
248                case WifiManager.CANCEL_WPS:
249                case WifiManager.DISABLE_NETWORK:
250                case WifiManager.RSSI_PKTCNT_FETCH: {
251                    mWifiStateMachine.sendMessage(Message.obtain(msg));
252                    break;
253                }
254                default: {
255                    Slog.d(TAG, "ClientHandler.handleMessage ignoring msg=" + msg);
256                    break;
257                }
258            }
259        }
260
261        private void replyFailed(Message msg, int what, int why) {
262            Message reply = msg.obtain();
263            reply.what = what;
264            reply.arg1 = why;
265            try {
266                msg.replyTo.send(reply);
267            } catch (RemoteException e) {
268                // There's not much we can do if reply can't be sent!
269            }
270        }
271    }
272    private ClientHandler mClientHandler;
273
274    /**
275     * Handles interaction with WifiStateMachine
276     */
277    private class WifiStateMachineHandler extends Handler {
278        private AsyncChannel mWsmChannel;
279
280        WifiStateMachineHandler(Looper looper) {
281            super(looper);
282            mWsmChannel = new AsyncChannel();
283            mWsmChannel.connect(mContext, this, mWifiStateMachine.getHandler());
284        }
285
286        @Override
287        public void handleMessage(Message msg) {
288            switch (msg.what) {
289                case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: {
290                    if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
291                        mWifiStateMachineChannel = mWsmChannel;
292                    } else {
293                        Slog.e(TAG, "WifiStateMachine connection failure, error=" + msg.arg1);
294                        mWifiStateMachineChannel = null;
295                    }
296                    break;
297                }
298                case AsyncChannel.CMD_CHANNEL_DISCONNECTED: {
299                    Slog.e(TAG, "WifiStateMachine channel lost, msg.arg1 =" + msg.arg1);
300                    mWifiStateMachineChannel = null;
301                    //Re-establish connection to state machine
302                    mWsmChannel.connect(mContext, this, mWifiStateMachine.getHandler());
303                    break;
304                }
305                default: {
306                    Slog.d(TAG, "WifiStateMachineHandler.handleMessage ignoring msg=" + msg);
307                    break;
308                }
309            }
310        }
311    }
312
313    WifiStateMachineHandler mWifiStateMachineHandler;
314
315    private WifiController mWifiController;
316
317    public WifiServiceImpl(Context context) {
318        mContext = context;
319        mWifiInjector = WifiInjector.getInstance();
320        FrameworkFacade facade = new FrameworkFacade();
321        HandlerThread wifiThread = new HandlerThread("WifiService");
322        wifiThread.start();
323        mWifiMetrics = mWifiInjector.getWifiMetrics();
324        mTrafficPoller = new WifiTrafficPoller(mContext, wifiThread.getLooper(),
325                WifiNative.getWlanNativeInterface().getInterfaceName());
326        mUserManager = UserManager.get(mContext);
327        HandlerThread wifiStateMachineThread = new HandlerThread("WifiStateMachine");
328        wifiStateMachineThread.start();
329        mCountryCode = new WifiCountryCode(WifiNative.getWlanNativeInterface(),
330                SystemProperties.get(BOOT_DEFAULT_WIFI_COUNTRY_CODE),
331                mContext.getResources().getBoolean(
332                        R.bool.config_wifi_revert_country_code_on_cellular_loss));
333        mWifiStateMachine = new WifiStateMachine(mContext, facade,
334            wifiStateMachineThread.getLooper(), mUserManager, mWifiInjector,
335            new BackupManagerProxy(), mCountryCode);
336        mSettingsStore = new WifiSettingsStore(mContext);
337        mWifiStateMachine.enableRssiPolling(true);
338        mBatteryStats = BatteryStatsService.getService();
339        mPowerManager = context.getSystemService(PowerManager.class);
340        mAppOps = (AppOpsManager)context.getSystemService(Context.APP_OPS_SERVICE);
341        mCertManager = new WifiCertManager(mContext);
342
343        mNotificationController = new WifiNotificationController(mContext,
344                wifiThread.getLooper(), mWifiStateMachine, facade, null);
345
346        mClientHandler = new ClientHandler(wifiThread.getLooper());
347        mWifiStateMachineHandler = new WifiStateMachineHandler(wifiThread.getLooper());
348        mWifiController = new WifiController(mContext, mWifiStateMachine,
349                mSettingsStore, mLocks, wifiThread.getLooper(), facade);
350    }
351
352
353    /**
354     * Check if Wi-Fi needs to be enabled and start
355     * if needed
356     *
357     * This function is used only at boot time
358     */
359    public void checkAndStartWifi() {
360        /* Check if wi-fi needs to be enabled */
361        boolean wifiEnabled = mSettingsStore.isWifiToggleEnabled();
362        Slog.i(TAG, "WifiService starting up with Wi-Fi " +
363                (wifiEnabled ? "enabled" : "disabled"));
364
365        registerForScanModeChange();
366        mContext.registerReceiver(
367                new BroadcastReceiver() {
368                    @Override
369                    public void onReceive(Context context, Intent intent) {
370                        if (mSettingsStore.handleAirplaneModeToggled()) {
371                            mWifiController.sendMessage(CMD_AIRPLANE_TOGGLED);
372                        }
373                        if (mSettingsStore.isAirplaneModeOn()) {
374                            Log.d(TAG, "resetting country code because Airplane mode is ON");
375                            mCountryCode.airplaneModeEnabled();
376                        }
377                    }
378                },
379                new IntentFilter(Intent.ACTION_AIRPLANE_MODE_CHANGED));
380
381        mContext.registerReceiver(
382                new BroadcastReceiver() {
383                    @Override
384                    public void onReceive(Context context, Intent intent) {
385                        String state = intent.getStringExtra(IccCardConstants.INTENT_KEY_ICC_STATE);
386                        if (state.equals(IccCardConstants.INTENT_VALUE_ICC_ABSENT)) {
387                            Log.d(TAG, "resetting networks because SIM was removed");
388                            mWifiStateMachine.resetSimAuthNetworks();
389                            Log.d(TAG, "resetting country code because SIM is removed");
390                            mCountryCode.simCardRemoved();
391                        }
392                    }
393                },
394                new IntentFilter(TelephonyIntents.ACTION_SIM_STATE_CHANGED));
395
396        // Adding optimizations of only receiving broadcasts when wifi is enabled
397        // can result in race conditions when apps toggle wifi in the background
398        // without active user involvement. Always receive broadcasts.
399        registerForBroadcasts();
400        registerForPackageOrUserRemoval();
401        mInIdleMode = mPowerManager.isDeviceIdleMode();
402
403        mWifiController.start();
404
405        // If we are already disabled (could be due to airplane mode), avoid changing persist
406        // state here
407        if (wifiEnabled) setWifiEnabled(wifiEnabled);
408    }
409
410    public void handleUserSwitch(int userId) {
411        mWifiStateMachine.handleUserSwitch(userId);
412    }
413
414    /**
415     * see {@link android.net.wifi.WifiManager#pingSupplicant()}
416     * @return {@code true} if the operation succeeds, {@code false} otherwise
417     */
418    public boolean pingSupplicant() {
419        enforceAccessPermission();
420        if (mWifiStateMachineChannel != null) {
421            return mWifiStateMachine.syncPingSupplicant(mWifiStateMachineChannel);
422        } else {
423            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
424            return false;
425        }
426    }
427
428    /**
429     * see {@link android.net.wifi.WifiManager#startScan}
430     * and {@link android.net.wifi.WifiManager#startCustomizedScan}
431     *
432     * @param settings If null, use default parameter, i.e. full scan.
433     * @param workSource If null, all blame is given to the calling uid.
434     */
435    public void startScan(ScanSettings settings, WorkSource workSource) {
436        enforceChangePermission();
437        synchronized (this) {
438            if (mInIdleMode) {
439                // Need to send an immediate scan result broadcast in case the
440                // caller is waiting for a result ..
441
442                // clear calling identity to send broadcast
443                long callingIdentity = Binder.clearCallingIdentity();
444                try {
445                    mWifiStateMachine.sendScanResultsAvailableBroadcast(/* scanSucceeded = */ false);
446                } finally {
447                    // restore calling identity
448                    Binder.restoreCallingIdentity(callingIdentity);
449                }
450                mScanPending = true;
451                return;
452            }
453        }
454        if (settings != null) {
455            settings = new ScanSettings(settings);
456            if (!settings.isValid()) {
457                Slog.e(TAG, "invalid scan setting");
458                return;
459            }
460        }
461        if (workSource != null) {
462            enforceWorkSourcePermission();
463            // WifiManager currently doesn't use names, so need to clear names out of the
464            // supplied WorkSource to allow future WorkSource combining.
465            workSource.clearNames();
466        }
467        mWifiStateMachine.startScan(Binder.getCallingUid(), scanRequestCounter++,
468                settings, workSource);
469    }
470
471    public String getWpsNfcConfigurationToken(int netId) {
472        enforceConnectivityInternalPermission();
473        return mWifiStateMachine.syncGetWpsNfcConfigurationToken(netId);
474    }
475
476    boolean mInIdleMode;
477    boolean mScanPending;
478
479    void handleIdleModeChanged() {
480        boolean doScan = false;
481        synchronized (this) {
482            boolean idle = mPowerManager.isDeviceIdleMode();
483            if (mInIdleMode != idle) {
484                mInIdleMode = idle;
485                if (!idle) {
486                    if (mScanPending) {
487                        mScanPending = false;
488                        doScan = true;
489                    }
490                }
491            }
492        }
493        if (doScan) {
494            // Someone requested a scan while we were idle; do a full scan now.
495            startScan(null, null);
496        }
497    }
498
499    private void enforceAccessPermission() {
500        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.ACCESS_WIFI_STATE,
501                "WifiService");
502    }
503
504    private void enforceChangePermission() {
505        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.CHANGE_WIFI_STATE,
506                "WifiService");
507    }
508
509    private void enforceLocationHardwarePermission() {
510        mContext.enforceCallingOrSelfPermission(Manifest.permission.LOCATION_HARDWARE,
511                "LocationHardware");
512    }
513
514    private void enforceReadCredentialPermission() {
515        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.READ_WIFI_CREDENTIAL,
516                                                "WifiService");
517    }
518
519    private void enforceWorkSourcePermission() {
520        mContext.enforceCallingPermission(android.Manifest.permission.UPDATE_DEVICE_STATS,
521                "WifiService");
522
523    }
524
525    private void enforceMulticastChangePermission() {
526        mContext.enforceCallingOrSelfPermission(
527                android.Manifest.permission.CHANGE_WIFI_MULTICAST_STATE,
528                "WifiService");
529    }
530
531    private void enforceConnectivityInternalPermission() {
532        mContext.enforceCallingOrSelfPermission(
533                android.Manifest.permission.CONNECTIVITY_INTERNAL,
534                "ConnectivityService");
535    }
536
537    /**
538     * see {@link android.net.wifi.WifiManager#setWifiEnabled(boolean)}
539     * @param enable {@code true} to enable, {@code false} to disable.
540     * @return {@code true} if the enable/disable operation was
541     *         started or is already in the queue.
542     */
543    public synchronized boolean setWifiEnabled(boolean enable) {
544        enforceChangePermission();
545        Slog.d(TAG, "setWifiEnabled: " + enable + " pid=" + Binder.getCallingPid()
546                    + ", uid=" + Binder.getCallingUid());
547
548        /*
549        * Caller might not have WRITE_SECURE_SETTINGS,
550        * only CHANGE_WIFI_STATE is enforced
551        */
552
553        long ident = Binder.clearCallingIdentity();
554        try {
555            if (! mSettingsStore.handleWifiToggled(enable)) {
556                // Nothing to do if wifi cannot be toggled
557                return true;
558            }
559        } finally {
560            Binder.restoreCallingIdentity(ident);
561        }
562
563        mWifiController.sendMessage(CMD_WIFI_TOGGLED);
564        return true;
565    }
566
567    /**
568     * see {@link WifiManager#getWifiState()}
569     * @return One of {@link WifiManager#WIFI_STATE_DISABLED},
570     *         {@link WifiManager#WIFI_STATE_DISABLING},
571     *         {@link WifiManager#WIFI_STATE_ENABLED},
572     *         {@link WifiManager#WIFI_STATE_ENABLING},
573     *         {@link WifiManager#WIFI_STATE_UNKNOWN}
574     */
575    public int getWifiEnabledState() {
576        enforceAccessPermission();
577        return mWifiStateMachine.syncGetWifiState();
578    }
579
580    /**
581     * see {@link android.net.wifi.WifiManager#setWifiApEnabled(WifiConfiguration, boolean)}
582     * @param wifiConfig SSID, security and channel details as
583     *        part of WifiConfiguration
584     * @param enabled true to enable and false to disable
585     */
586    public void setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled) {
587        enforceChangePermission();
588        ConnectivityManager.enforceTetherChangePermission(mContext);
589        if (mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) {
590            throw new SecurityException("DISALLOW_CONFIG_TETHERING is enabled for this user.");
591        }
592        // null wifiConfig is a meaningful input for CMD_SET_AP
593        if (wifiConfig == null || isValid(wifiConfig)) {
594            mWifiController.obtainMessage(CMD_SET_AP, enabled ? 1 : 0, 0, wifiConfig).sendToTarget();
595        } else {
596            Slog.e(TAG, "Invalid WifiConfiguration");
597        }
598    }
599
600    /**
601     * see {@link WifiManager#getWifiApState()}
602     * @return One of {@link WifiManager#WIFI_AP_STATE_DISABLED},
603     *         {@link WifiManager#WIFI_AP_STATE_DISABLING},
604     *         {@link WifiManager#WIFI_AP_STATE_ENABLED},
605     *         {@link WifiManager#WIFI_AP_STATE_ENABLING},
606     *         {@link WifiManager#WIFI_AP_STATE_FAILED}
607     */
608    public int getWifiApEnabledState() {
609        enforceAccessPermission();
610        return mWifiStateMachine.syncGetWifiApState();
611    }
612
613    /**
614     * see {@link WifiManager#getWifiApConfiguration()}
615     * @return soft access point configuration
616     */
617    public WifiConfiguration getWifiApConfiguration() {
618        enforceAccessPermission();
619        return mWifiStateMachine.syncGetWifiApConfiguration();
620    }
621
622    /**
623     * see {@link WifiManager#buildWifiConfig()}
624     * @return a WifiConfiguration.
625     */
626    public WifiConfiguration buildWifiConfig(String uriString, String mimeType, byte[] data) {
627        if (mimeType.equals(ConfigBuilder.WifiConfigType)) {
628            try {
629                return ConfigBuilder.buildConfig(uriString, data, mContext);
630            }
631            catch (IOException | GeneralSecurityException | SAXException e) {
632                Log.e(TAG, "Failed to parse wi-fi configuration: " + e);
633            }
634        }
635        else {
636            Log.i(TAG, "Unknown wi-fi config type: " + mimeType);
637        }
638        return null;
639    }
640
641    /**
642     * see {@link WifiManager#setWifiApConfiguration(WifiConfiguration)}
643     * @param wifiConfig WifiConfiguration details for soft access point
644     */
645    public void setWifiApConfiguration(WifiConfiguration wifiConfig) {
646        enforceChangePermission();
647        if (wifiConfig == null)
648            return;
649        if (isValid(wifiConfig)) {
650            mWifiStateMachine.setWifiApConfiguration(wifiConfig);
651        } else {
652            Slog.e(TAG, "Invalid WifiConfiguration");
653        }
654    }
655
656    /**
657     * @param enable {@code true} to enable, {@code false} to disable.
658     * @return {@code true} if the enable/disable operation was
659     *         started or is already in the queue.
660     */
661    public boolean isScanAlwaysAvailable() {
662        enforceAccessPermission();
663        return mSettingsStore.isScanAlwaysAvailable();
664    }
665
666    /**
667     * see {@link android.net.wifi.WifiManager#disconnect()}
668     */
669    public void disconnect() {
670        enforceChangePermission();
671        mWifiStateMachine.disconnectCommand();
672    }
673
674    /**
675     * see {@link android.net.wifi.WifiManager#reconnect()}
676     */
677    public void reconnect() {
678        enforceChangePermission();
679        mWifiStateMachine.reconnectCommand();
680    }
681
682    /**
683     * see {@link android.net.wifi.WifiManager#reassociate()}
684     */
685    public void reassociate() {
686        enforceChangePermission();
687        mWifiStateMachine.reassociateCommand();
688    }
689
690    /**
691     * see {@link android.net.wifi.WifiManager#getSupportedFeatures}
692     */
693    public int getSupportedFeatures() {
694        enforceAccessPermission();
695        if (mWifiStateMachineChannel != null) {
696            return mWifiStateMachine.syncGetSupportedFeatures(mWifiStateMachineChannel);
697        } else {
698            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
699            return 0;
700        }
701    }
702
703    /**
704     * see {@link android.net.wifi.WifiManager#getControllerActivityEnergyInfo(int)}
705     */
706    public WifiActivityEnergyInfo reportActivityInfo() {
707        enforceAccessPermission();
708        if ((getSupportedFeatures() & WifiManager.WIFI_FEATURE_LINK_LAYER_STATS) == 0) {
709            return null;
710        }
711        WifiLinkLayerStats stats;
712        WifiActivityEnergyInfo energyInfo = null;
713        if (mWifiStateMachineChannel != null) {
714            stats = mWifiStateMachine.syncGetLinkLayerStats(mWifiStateMachineChannel);
715            if (stats != null) {
716                final long rxIdleCurrent = mContext.getResources().getInteger(
717                        com.android.internal.R.integer.config_wifi_idle_receive_cur_ma);
718                final long rxCurrent = mContext.getResources().getInteger(
719                        com.android.internal.R.integer.config_wifi_active_rx_cur_ma);
720                final long txCurrent = mContext.getResources().getInteger(
721                        com.android.internal.R.integer.config_wifi_tx_cur_ma);
722                final double voltage = mContext.getResources().getInteger(
723                        com.android.internal.R.integer.config_wifi_operating_voltage_mv)
724                        / 1000.0;
725
726                final long rxIdleTime = stats.on_time - stats.tx_time - stats.rx_time;
727                final long energyUsed = (long)((stats.tx_time * txCurrent +
728                        stats.rx_time * rxCurrent +
729                        rxIdleTime * rxIdleCurrent) * voltage);
730                if (VDBG || rxIdleTime < 0 || stats.on_time < 0 || stats.tx_time < 0 ||
731                        stats.rx_time < 0 || energyUsed < 0) {
732                    StringBuilder sb = new StringBuilder();
733                    sb.append(" rxIdleCur=" + rxIdleCurrent);
734                    sb.append(" rxCur=" + rxCurrent);
735                    sb.append(" txCur=" + txCurrent);
736                    sb.append(" voltage=" + voltage);
737                    sb.append(" on_time=" + stats.on_time);
738                    sb.append(" tx_time=" + stats.tx_time);
739                    sb.append(" rx_time=" + stats.rx_time);
740                    sb.append(" rxIdleTime=" + rxIdleTime);
741                    sb.append(" energy=" + energyUsed);
742                    Log.d(TAG, " reportActivityInfo: " + sb.toString());
743                }
744
745                // Convert the LinkLayerStats into EnergyActivity
746                energyInfo = new WifiActivityEnergyInfo(SystemClock.elapsedRealtime(),
747                        WifiActivityEnergyInfo.STACK_STATE_STATE_IDLE, stats.tx_time,
748                        stats.rx_time, rxIdleTime, energyUsed);
749            }
750            if (energyInfo != null && energyInfo.isValid()) {
751                return energyInfo;
752            } else {
753                return null;
754            }
755        } else {
756            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
757            return null;
758        }
759    }
760
761    /**
762     * see {@link android.net.wifi.WifiManager#getConfiguredNetworks()}
763     * @return the list of configured networks
764     */
765    public List<WifiConfiguration> getConfiguredNetworks() {
766        enforceAccessPermission();
767        if (mWifiStateMachineChannel != null) {
768            return mWifiStateMachine.syncGetConfiguredNetworks(Binder.getCallingUid(),
769                    mWifiStateMachineChannel);
770        } else {
771            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
772            return null;
773        }
774    }
775
776    /**
777     * see {@link android.net.wifi.WifiManager#getPrivilegedConfiguredNetworks()}
778     * @return the list of configured networks with real preSharedKey
779     */
780    public List<WifiConfiguration> getPrivilegedConfiguredNetworks() {
781        enforceReadCredentialPermission();
782        enforceAccessPermission();
783        if (mWifiStateMachineChannel != null) {
784            return mWifiStateMachine.syncGetPrivilegedConfiguredNetwork(mWifiStateMachineChannel);
785        } else {
786            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
787            return null;
788        }
789    }
790
791    /**
792     * Returns a WifiConfiguration matching this ScanResult
793     * @param scanResult scanResult that represents the BSSID
794     * @return {@link WifiConfiguration} that matches this BSSID or null
795     */
796    public WifiConfiguration getMatchingWifiConfig(ScanResult scanResult) {
797        enforceAccessPermission();
798        return mWifiStateMachine.syncGetMatchingWifiConfig(scanResult, mWifiStateMachineChannel);
799    }
800
801    /**
802     * see {@link android.net.wifi.WifiManager#addOrUpdateNetwork(WifiConfiguration)}
803     * @return the supplicant-assigned identifier for the new or updated
804     * network if the operation succeeds, or {@code -1} if it fails
805     */
806    public int addOrUpdateNetwork(WifiConfiguration config) {
807        enforceChangePermission();
808        if (isValid(config) && isValidPasspoint(config)) {
809
810            WifiEnterpriseConfig enterpriseConfig = config.enterpriseConfig;
811
812            if (config.isPasspoint() &&
813                    (enterpriseConfig.getEapMethod() == WifiEnterpriseConfig.Eap.TLS ||
814                            enterpriseConfig.getEapMethod() == WifiEnterpriseConfig.Eap.TTLS)) {
815                if (config.updateIdentifier != null) {
816                    enforceAccessPermission();
817                }
818                else {
819                    try {
820                        verifyCert(enterpriseConfig.getCaCertificate());
821                    } catch (CertPathValidatorException cpve) {
822                        Slog.e(TAG, "CA Cert " +
823                                enterpriseConfig.getCaCertificate().getSubjectX500Principal() +
824                                " untrusted: " + cpve.getMessage());
825                        return -1;
826                    } catch (GeneralSecurityException | IOException e) {
827                        Slog.e(TAG, "Failed to verify certificate" +
828                                enterpriseConfig.getCaCertificate().getSubjectX500Principal() +
829                                ": " + e);
830                        return -1;
831                    }
832                }
833            }
834
835            //TODO: pass the Uid the WifiStateMachine as a message parameter
836            Slog.i("addOrUpdateNetwork", " uid = " + Integer.toString(Binder.getCallingUid())
837                    + " SSID " + config.SSID
838                    + " nid=" + Integer.toString(config.networkId));
839            if (config.networkId == WifiConfiguration.INVALID_NETWORK_ID) {
840                config.creatorUid = Binder.getCallingUid();
841            } else {
842                config.lastUpdateUid = Binder.getCallingUid();
843            }
844            if (mWifiStateMachineChannel != null) {
845                return mWifiStateMachine.syncAddOrUpdateNetwork(mWifiStateMachineChannel, config);
846            } else {
847                Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
848                return -1;
849            }
850        } else {
851            Slog.e(TAG, "bad network configuration");
852            return -1;
853        }
854    }
855
856    public static void verifyCert(X509Certificate caCert)
857            throws GeneralSecurityException, IOException {
858        CertificateFactory factory = CertificateFactory.getInstance("X.509");
859        CertPathValidator validator =
860                CertPathValidator.getInstance(CertPathValidator.getDefaultType());
861        CertPath path = factory.generateCertPath(
862                Arrays.asList(caCert));
863        KeyStore ks = KeyStore.getInstance("AndroidCAStore");
864        ks.load(null, null);
865        PKIXParameters params = new PKIXParameters(ks);
866        params.setRevocationEnabled(false);
867        validator.validate(path, params);
868    }
869
870    /**
871     * See {@link android.net.wifi.WifiManager#removeNetwork(int)}
872     * @param netId the integer that identifies the network configuration
873     * to the supplicant
874     * @return {@code true} if the operation succeeded
875     */
876    public boolean removeNetwork(int netId) {
877        enforceChangePermission();
878
879        if (mWifiStateMachineChannel != null) {
880            return mWifiStateMachine.syncRemoveNetwork(mWifiStateMachineChannel, netId);
881        } else {
882            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
883            return false;
884        }
885    }
886
887    /**
888     * See {@link android.net.wifi.WifiManager#enableNetwork(int, boolean)}
889     * @param netId the integer that identifies the network configuration
890     * to the supplicant
891     * @param disableOthers if true, disable all other networks.
892     * @return {@code true} if the operation succeeded
893     */
894    public boolean enableNetwork(int netId, boolean disableOthers) {
895        enforceChangePermission();
896        if (mWifiStateMachineChannel != null) {
897            return mWifiStateMachine.syncEnableNetwork(mWifiStateMachineChannel, netId,
898                    disableOthers);
899        } else {
900            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
901            return false;
902        }
903    }
904
905    /**
906     * See {@link android.net.wifi.WifiManager#disableNetwork(int)}
907     * @param netId the integer that identifies the network configuration
908     * to the supplicant
909     * @return {@code true} if the operation succeeded
910     */
911    public boolean disableNetwork(int netId) {
912        enforceChangePermission();
913        if (mWifiStateMachineChannel != null) {
914            return mWifiStateMachine.syncDisableNetwork(mWifiStateMachineChannel, netId);
915        } else {
916            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
917            return false;
918        }
919    }
920
921    /**
922     * See {@link android.net.wifi.WifiManager#getConnectionInfo()}
923     * @return the Wi-Fi information, contained in {@link WifiInfo}.
924     */
925    public WifiInfo getConnectionInfo() {
926        enforceAccessPermission();
927        /*
928         * Make sure we have the latest information, by sending
929         * a status request to the supplicant.
930         */
931        return mWifiStateMachine.syncRequestConnectionInfo();
932    }
933
934    /**
935     * Return the results of the most recent access point scan, in the form of
936     * a list of {@link ScanResult} objects.
937     * @return the list of results
938     */
939    public List<ScanResult> getScanResults(String callingPackage) {
940        enforceAccessPermission();
941        int userId = UserHandle.getCallingUserId();
942        int uid = Binder.getCallingUid();
943        boolean canReadPeerMacAddresses = checkPeersMacAddress();
944        boolean isActiveNetworkScorer =
945                NetworkScorerAppManager.isCallerActiveScorer(mContext, uid);
946        boolean hasInteractUsersFull = checkInteractAcrossUsersFull();
947        long ident = Binder.clearCallingIdentity();
948        try {
949            if (!canReadPeerMacAddresses && !isActiveNetworkScorer
950                    && !isLocationEnabled(callingPackage)) {
951                return new ArrayList<ScanResult>();
952            }
953            if (!canReadPeerMacAddresses && !isActiveNetworkScorer
954                    && !checkCallerCanAccessScanResults(callingPackage, uid)) {
955                return new ArrayList<ScanResult>();
956            }
957            if (mAppOps.noteOp(AppOpsManager.OP_WIFI_SCAN, uid, callingPackage)
958                    != AppOpsManager.MODE_ALLOWED) {
959                return new ArrayList<ScanResult>();
960            }
961            if (!isCurrentProfile(userId) && !hasInteractUsersFull) {
962                return new ArrayList<ScanResult>();
963            }
964            return mWifiStateMachine.syncGetScanResultsList();
965        } finally {
966            Binder.restoreCallingIdentity(ident);
967        }
968    }
969
970    /**
971     * Add a Hotspot 2.0 release 2 Management Object
972     * @param mo The MO in XML form
973     * @return -1 for failure
974     */
975    public int addPasspointManagementObject(String mo) {
976        return mWifiStateMachine.syncAddPasspointManagementObject(mWifiStateMachineChannel, mo);
977    }
978
979    /**
980     * Modify a Hotspot 2.0 release 2 Management Object
981     * @param fqdn The FQDN of the service provider
982     * @param mos A List of MO definitions to be updated
983     * @return the number of nodes updated, or -1 for failure
984     */
985    public int modifyPasspointManagementObject(String fqdn, List<PasspointManagementObjectDefinition> mos) {
986        return mWifiStateMachine.syncModifyPasspointManagementObject(mWifiStateMachineChannel, fqdn, mos);
987    }
988
989    /**
990     * Query for a Hotspot 2.0 release 2 OSU icon
991     * @param bssid The BSSID of the AP
992     * @param fileName Icon file name
993     */
994    public void queryPasspointIcon(long bssid, String fileName) {
995        mWifiStateMachine.syncQueryPasspointIcon(mWifiStateMachineChannel, bssid, fileName);
996    }
997
998    /**
999     * Match the currently associated network against the SP matching the given FQDN
1000     * @param fqdn FQDN of the SP
1001     * @return ordinal [HomeProvider, RoamingProvider, Incomplete, None, Declined]
1002     */
1003    public int matchProviderWithCurrentNetwork(String fqdn) {
1004        return mWifiStateMachine.matchProviderWithCurrentNetwork(mWifiStateMachineChannel, fqdn);
1005    }
1006
1007    /**
1008     * Deauthenticate and set the re-authentication hold off time for the current network
1009     * @param holdoff hold off time in milliseconds
1010     * @param ess set if the hold off pertains to an ESS rather than a BSS
1011     */
1012    public void deauthenticateNetwork(long holdoff, boolean ess) {
1013        mWifiStateMachine.deauthenticateNetwork(mWifiStateMachineChannel, holdoff, ess);
1014    }
1015
1016    private boolean isLocationEnabled(String callingPackage) {
1017        boolean legacyForegroundApp = !isMApp(mContext, callingPackage)
1018                && isForegroundApp(callingPackage);
1019        return legacyForegroundApp || Settings.Secure.getInt(mContext.getContentResolver(),
1020                Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_OFF)
1021                != Settings.Secure.LOCATION_MODE_OFF;
1022    }
1023
1024    /**
1025     * Returns true if the caller holds INTERACT_ACROSS_USERS_FULL.
1026     */
1027    private boolean checkInteractAcrossUsersFull() {
1028        return mContext.checkCallingOrSelfPermission(
1029                android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
1030                == PackageManager.PERMISSION_GRANTED;
1031    }
1032
1033    /**
1034     * Returns true if the caller holds PEERS_MAC_ADDRESS.
1035     */
1036    private boolean checkPeersMacAddress() {
1037        return mContext.checkCallingOrSelfPermission(
1038                android.Manifest.permission.PEERS_MAC_ADDRESS) == PackageManager.PERMISSION_GRANTED;
1039    }
1040
1041    /**
1042     * Returns true if the calling user is the current one or a profile of the
1043     * current user..
1044     */
1045    private boolean isCurrentProfile(int userId) {
1046        int currentUser = ActivityManager.getCurrentUser();
1047        if (userId == currentUser) {
1048            return true;
1049        }
1050        List<UserInfo> profiles = mUserManager.getProfiles(currentUser);
1051        for (UserInfo user : profiles) {
1052            if (userId == user.id) {
1053                return true;
1054            }
1055        }
1056        return false;
1057    }
1058
1059    /**
1060     * Tell the supplicant to persist the current list of configured networks.
1061     * @return {@code true} if the operation succeeded
1062     *
1063     * TODO: deprecate this
1064     */
1065    public boolean saveConfiguration() {
1066        boolean result = true;
1067        enforceChangePermission();
1068        if (mWifiStateMachineChannel != null) {
1069            return mWifiStateMachine.syncSaveConfig(mWifiStateMachineChannel);
1070        } else {
1071            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
1072            return false;
1073        }
1074    }
1075
1076    /**
1077     * Set the country code
1078     * @param countryCode ISO 3166 country code.
1079     * @param persist {@code true} if the setting should be remembered.
1080     *
1081     * The persist behavior exists so that wifi can fall back to the last
1082     * persisted country code on a restart, when the locale information is
1083     * not available from telephony.
1084     */
1085    public void setCountryCode(String countryCode, boolean persist) {
1086        Slog.i(TAG, "WifiService trying to set country code to " + countryCode +
1087                " with persist set to " + persist);
1088        enforceConnectivityInternalPermission();
1089        final long token = Binder.clearCallingIdentity();
1090        try {
1091            mCountryCode.setCountryCode(countryCode);
1092        } finally {
1093            Binder.restoreCallingIdentity(token);
1094        }
1095    }
1096
1097     /**
1098     * Get the country code
1099     * @return ISO 3166 country code.
1100     */
1101    public String getCountryCode() {
1102        enforceConnectivityInternalPermission();
1103        String country = mCountryCode.getCurrentCountryCode();
1104        return country;
1105    }
1106    /**
1107     * Set the operational frequency band
1108     * @param band One of
1109     *     {@link WifiManager#WIFI_FREQUENCY_BAND_AUTO},
1110     *     {@link WifiManager#WIFI_FREQUENCY_BAND_5GHZ},
1111     *     {@link WifiManager#WIFI_FREQUENCY_BAND_2GHZ},
1112     * @param persist {@code true} if the setting should be remembered.
1113     *
1114     */
1115    public void setFrequencyBand(int band, boolean persist) {
1116        enforceChangePermission();
1117        if (!isDualBandSupported()) return;
1118        Slog.i(TAG, "WifiService trying to set frequency band to " + band +
1119                " with persist set to " + persist);
1120        final long token = Binder.clearCallingIdentity();
1121        try {
1122            mWifiStateMachine.setFrequencyBand(band, persist);
1123        } finally {
1124            Binder.restoreCallingIdentity(token);
1125        }
1126    }
1127
1128
1129    /**
1130     * Get the operational frequency band
1131     */
1132    public int getFrequencyBand() {
1133        enforceAccessPermission();
1134        return mWifiStateMachine.getFrequencyBand();
1135    }
1136
1137    public boolean isDualBandSupported() {
1138        //TODO: Should move towards adding a driver API that checks at runtime
1139        return mContext.getResources().getBoolean(
1140                com.android.internal.R.bool.config_wifi_dual_band_support);
1141    }
1142
1143    /**
1144     * Return the DHCP-assigned addresses from the last successful DHCP request,
1145     * if any.
1146     * @return the DHCP information
1147     * @deprecated
1148     */
1149    public DhcpInfo getDhcpInfo() {
1150        enforceAccessPermission();
1151        DhcpResults dhcpResults = mWifiStateMachine.syncGetDhcpResults();
1152
1153        DhcpInfo info = new DhcpInfo();
1154
1155        if (dhcpResults.ipAddress != null &&
1156                dhcpResults.ipAddress.getAddress() instanceof Inet4Address) {
1157            info.ipAddress = NetworkUtils.inetAddressToInt((Inet4Address) dhcpResults.ipAddress.getAddress());
1158        }
1159
1160        if (dhcpResults.gateway != null) {
1161            info.gateway = NetworkUtils.inetAddressToInt((Inet4Address) dhcpResults.gateway);
1162        }
1163
1164        int dnsFound = 0;
1165        for (InetAddress dns : dhcpResults.dnsServers) {
1166            if (dns instanceof Inet4Address) {
1167                if (dnsFound == 0) {
1168                    info.dns1 = NetworkUtils.inetAddressToInt((Inet4Address)dns);
1169                } else {
1170                    info.dns2 = NetworkUtils.inetAddressToInt((Inet4Address)dns);
1171                }
1172                if (++dnsFound > 1) break;
1173            }
1174        }
1175        Inet4Address serverAddress = dhcpResults.serverAddress;
1176        if (serverAddress != null) {
1177            info.serverAddress = NetworkUtils.inetAddressToInt(serverAddress);
1178        }
1179        info.leaseDuration = dhcpResults.leaseDuration;
1180
1181        return info;
1182    }
1183
1184    /**
1185     * see {@link android.net.wifi.WifiManager#addToBlacklist}
1186     *
1187     */
1188    public void addToBlacklist(String bssid) {
1189        enforceChangePermission();
1190
1191        mWifiStateMachine.addToBlacklist(bssid);
1192    }
1193
1194    /**
1195     * see {@link android.net.wifi.WifiManager#clearBlacklist}
1196     *
1197     */
1198    public void clearBlacklist() {
1199        enforceChangePermission();
1200
1201        mWifiStateMachine.clearBlacklist();
1202    }
1203
1204    /**
1205     * enable TDLS for the local NIC to remote NIC
1206     * The APPs don't know the remote MAC address to identify NIC though,
1207     * so we need to do additional work to find it from remote IP address
1208     */
1209
1210    class TdlsTaskParams {
1211        public String remoteIpAddress;
1212        public boolean enable;
1213    }
1214
1215    class TdlsTask extends AsyncTask<TdlsTaskParams, Integer, Integer> {
1216        @Override
1217        protected Integer doInBackground(TdlsTaskParams... params) {
1218
1219            // Retrieve parameters for the call
1220            TdlsTaskParams param = params[0];
1221            String remoteIpAddress = param.remoteIpAddress.trim();
1222            boolean enable = param.enable;
1223
1224            // Get MAC address of Remote IP
1225            String macAddress = null;
1226
1227            BufferedReader reader = null;
1228
1229            try {
1230                reader = new BufferedReader(new FileReader("/proc/net/arp"));
1231
1232                // Skip over the line bearing colum titles
1233                String line = reader.readLine();
1234
1235                while ((line = reader.readLine()) != null) {
1236                    String[] tokens = line.split("[ ]+");
1237                    if (tokens.length < 6) {
1238                        continue;
1239                    }
1240
1241                    // ARP column format is
1242                    // Address HWType HWAddress Flags Mask IFace
1243                    String ip = tokens[0];
1244                    String mac = tokens[3];
1245
1246                    if (remoteIpAddress.equals(ip)) {
1247                        macAddress = mac;
1248                        break;
1249                    }
1250                }
1251
1252                if (macAddress == null) {
1253                    Slog.w(TAG, "Did not find remoteAddress {" + remoteIpAddress + "} in " +
1254                            "/proc/net/arp");
1255                } else {
1256                    enableTdlsWithMacAddress(macAddress, enable);
1257                }
1258
1259            } catch (FileNotFoundException e) {
1260                Slog.e(TAG, "Could not open /proc/net/arp to lookup mac address");
1261            } catch (IOException e) {
1262                Slog.e(TAG, "Could not read /proc/net/arp to lookup mac address");
1263            } finally {
1264                try {
1265                    if (reader != null) {
1266                        reader.close();
1267                    }
1268                }
1269                catch (IOException e) {
1270                    // Do nothing
1271                }
1272            }
1273
1274            return 0;
1275        }
1276    }
1277
1278    public void enableTdls(String remoteAddress, boolean enable) {
1279        if (remoteAddress == null) {
1280          throw new IllegalArgumentException("remoteAddress cannot be null");
1281        }
1282
1283        TdlsTaskParams params = new TdlsTaskParams();
1284        params.remoteIpAddress = remoteAddress;
1285        params.enable = enable;
1286        new TdlsTask().execute(params);
1287    }
1288
1289
1290    public void enableTdlsWithMacAddress(String remoteMacAddress, boolean enable) {
1291        if (remoteMacAddress == null) {
1292          throw new IllegalArgumentException("remoteMacAddress cannot be null");
1293        }
1294
1295        mWifiStateMachine.enableTdls(remoteMacAddress, enable);
1296    }
1297
1298    /**
1299     * Get a reference to handler. This is used by a client to establish
1300     * an AsyncChannel communication with WifiService
1301     */
1302    public Messenger getWifiServiceMessenger() {
1303        enforceAccessPermission();
1304        enforceChangePermission();
1305        return new Messenger(mClientHandler);
1306    }
1307
1308    /**
1309     * Disable an ephemeral network, i.e. network that is created thru a WiFi Scorer
1310     */
1311    public void disableEphemeralNetwork(String SSID) {
1312        enforceAccessPermission();
1313        enforceChangePermission();
1314        mWifiStateMachine.disableEphemeralNetwork(SSID);
1315    }
1316
1317    /**
1318     * Get the IP and proxy configuration file
1319     */
1320    public String getConfigFile() {
1321        enforceAccessPermission();
1322        return mWifiStateMachine.getConfigFile();
1323    }
1324
1325    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
1326        @Override
1327        public void onReceive(Context context, Intent intent) {
1328            String action = intent.getAction();
1329            if (action.equals(Intent.ACTION_SCREEN_ON)) {
1330                mWifiController.sendMessage(CMD_SCREEN_ON);
1331            } else if (action.equals(Intent.ACTION_USER_PRESENT)) {
1332                mWifiController.sendMessage(CMD_USER_PRESENT);
1333            } else if (action.equals(Intent.ACTION_SCREEN_OFF)) {
1334                mWifiController.sendMessage(CMD_SCREEN_OFF);
1335            } else if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
1336                int pluggedType = intent.getIntExtra("plugged", 0);
1337                mWifiController.sendMessage(CMD_BATTERY_CHANGED, pluggedType, 0, null);
1338            } else if (action.equals(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED)) {
1339                int state = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE,
1340                        BluetoothAdapter.STATE_DISCONNECTED);
1341                mWifiStateMachine.sendBluetoothAdapterStateChange(state);
1342            } else if (action.equals(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) {
1343                boolean emergencyMode = intent.getBooleanExtra("phoneinECMState", false);
1344                mWifiController.sendMessage(CMD_EMERGENCY_MODE_CHANGED, emergencyMode ? 1 : 0, 0);
1345            } else if (action.equals(TelephonyIntents.ACTION_EMERGENCY_CALL_STATE_CHANGED)) {
1346                boolean inCall = intent.getBooleanExtra(PhoneConstants.PHONE_IN_EMERGENCY_CALL, false);
1347                mWifiController.sendMessage(CMD_EMERGENCY_CALL_STATE_CHANGED, inCall ? 1 : 0, 0);
1348            } else if (action.equals(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED)) {
1349                handleIdleModeChanged();
1350            }
1351        }
1352    };
1353
1354    /**
1355     * Observes settings changes to scan always mode.
1356     */
1357    private void registerForScanModeChange() {
1358        ContentObserver contentObserver = new ContentObserver(null) {
1359            @Override
1360            public void onChange(boolean selfChange) {
1361                mSettingsStore.handleWifiScanAlwaysAvailableToggled();
1362                mWifiController.sendMessage(CMD_SCAN_ALWAYS_MODE_CHANGED);
1363            }
1364        };
1365
1366        mContext.getContentResolver().registerContentObserver(
1367                Settings.Global.getUriFor(Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE),
1368                false, contentObserver);
1369    }
1370
1371    private void registerForBroadcasts() {
1372        IntentFilter intentFilter = new IntentFilter();
1373        intentFilter.addAction(Intent.ACTION_SCREEN_ON);
1374        intentFilter.addAction(Intent.ACTION_USER_PRESENT);
1375        intentFilter.addAction(Intent.ACTION_SCREEN_OFF);
1376        intentFilter.addAction(Intent.ACTION_BATTERY_CHANGED);
1377        intentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
1378        intentFilter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
1379        intentFilter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED);
1380        intentFilter.addAction(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED);
1381
1382        boolean trackEmergencyCallState = mContext.getResources().getBoolean(
1383                com.android.internal.R.bool.config_wifi_turn_off_during_emergency_call);
1384        if (trackEmergencyCallState) {
1385            intentFilter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALL_STATE_CHANGED);
1386        }
1387
1388        mContext.registerReceiver(mReceiver, intentFilter);
1389    }
1390
1391    private void registerForPackageOrUserRemoval() {
1392        IntentFilter intentFilter = new IntentFilter();
1393        intentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);
1394        intentFilter.addAction(Intent.ACTION_USER_REMOVED);
1395        mContext.registerReceiverAsUser(new BroadcastReceiver() {
1396            @Override
1397            public void onReceive(Context context, Intent intent) {
1398                switch (intent.getAction()) {
1399                    case Intent.ACTION_PACKAGE_REMOVED: {
1400                        if (intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) {
1401                            return;
1402                        }
1403                        int uid = intent.getIntExtra(Intent.EXTRA_UID, -1);
1404                        Uri uri = intent.getData();
1405                        if (uid == -1 || uri == null) {
1406                            return;
1407                        }
1408                        String pkgName = uri.getSchemeSpecificPart();
1409                        mWifiStateMachine.removeAppConfigs(pkgName, uid);
1410                        break;
1411                    }
1412                    case Intent.ACTION_USER_REMOVED: {
1413                        int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0);
1414                        mWifiStateMachine.removeUserConfigs(userHandle);
1415                        break;
1416                    }
1417                }
1418            }
1419        }, UserHandle.ALL, intentFilter, null, null);
1420    }
1421
1422    @Override
1423    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
1424        if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
1425                != PackageManager.PERMISSION_GRANTED) {
1426            pw.println("Permission Denial: can't dump WifiService from from pid="
1427                    + Binder.getCallingPid()
1428                    + ", uid=" + Binder.getCallingUid());
1429            return;
1430        }
1431        if (args.length > 0 && WifiMetrics.PROTO_DUMP_ARG.equals(args[0])) {
1432            // WifiMetrics proto bytes were requested. Dump only these.
1433            mWifiStateMachine.updateWifiMetrics();
1434            mWifiMetrics.dump(fd, pw, args);
1435        } else if (args.length > 0 && IpManager.DUMP_ARG.equals(args[0])) {
1436            // IpManager dump was requested. Pass it along and take no further action.
1437            String[] ipManagerArgs = new String[args.length - 1];
1438            System.arraycopy(args, 1, ipManagerArgs, 0, ipManagerArgs.length);
1439            mWifiStateMachine.dumpIpManager(fd, pw, ipManagerArgs);
1440        } else {
1441            pw.println("Wi-Fi is " + mWifiStateMachine.syncGetWifiStateByName());
1442            pw.println("Stay-awake conditions: " +
1443                    Settings.Global.getInt(mContext.getContentResolver(),
1444                                           Settings.Global.STAY_ON_WHILE_PLUGGED_IN, 0));
1445            pw.println("mMulticastEnabled " + mMulticastEnabled);
1446            pw.println("mMulticastDisabled " + mMulticastDisabled);
1447            pw.println("mInIdleMode " + mInIdleMode);
1448            pw.println("mScanPending " + mScanPending);
1449            mWifiController.dump(fd, pw, args);
1450            mSettingsStore.dump(fd, pw, args);
1451            mNotificationController.dump(fd, pw, args);
1452            mTrafficPoller.dump(fd, pw, args);
1453
1454            pw.println("Latest scan results:");
1455            List<ScanResult> scanResults = mWifiStateMachine.syncGetScanResultsList();
1456            long nowMs = System.currentTimeMillis();
1457            if (scanResults != null && scanResults.size() != 0) {
1458                pw.println("    BSSID              Frequency  RSSI    Age      SSID " +
1459                        "                                Flags");
1460                for (ScanResult r : scanResults) {
1461                    long ageSec = 0;
1462                    long ageMilli = 0;
1463                    if (nowMs > r.seen && r.seen > 0) {
1464                        ageSec = (nowMs - r.seen) / 1000;
1465                        ageMilli = (nowMs - r.seen) % 1000;
1466                    }
1467                    String candidate = " ";
1468                    if (r.isAutoJoinCandidate > 0) candidate = "+";
1469                    pw.printf("  %17s  %9d  %5d  %3d.%03d%s   %-32s  %s\n",
1470                                             r.BSSID,
1471                                             r.frequency,
1472                                             r.level,
1473                                             ageSec, ageMilli,
1474                                             candidate,
1475                                             r.SSID == null ? "" : r.SSID,
1476                                             r.capabilities);
1477                }
1478            }
1479            pw.println();
1480            pw.println("Locks acquired: " + mFullLocksAcquired + " full, " +
1481                    mFullHighPerfLocksAcquired + " full high perf, " +
1482                    mScanLocksAcquired + " scan");
1483            pw.println("Locks released: " + mFullLocksReleased + " full, " +
1484                    mFullHighPerfLocksReleased + " full high perf, " +
1485                    mScanLocksReleased + " scan");
1486            pw.println();
1487            pw.println("Locks held:");
1488            mLocks.dump(pw);
1489
1490            pw.println("Multicast Locks held:");
1491            for (Multicaster l : mMulticasters) {
1492                pw.print("    ");
1493                pw.println(l);
1494            }
1495
1496            pw.println();
1497            mWifiStateMachine.dump(fd, pw, args);
1498            pw.println();
1499        }
1500    }
1501
1502    private class WifiLock extends DeathRecipient {
1503        int mMode;
1504        WorkSource mWorkSource;
1505
1506        WifiLock(int lockMode, String tag, IBinder binder, WorkSource ws) {
1507            super(tag, binder);
1508            mMode = lockMode;
1509            mWorkSource = ws;
1510        }
1511
1512        public void binderDied() {
1513            synchronized (mLocks) {
1514                releaseWifiLockLocked(mBinder);
1515            }
1516        }
1517
1518        public String toString() {
1519            return "WifiLock{" + mTag + " type=" + mMode + " uid=" + mUid + "}";
1520        }
1521    }
1522
1523    public class LockList {
1524        private List<WifiLock> mList;
1525
1526        private LockList() {
1527            mList = new ArrayList<WifiLock>();
1528        }
1529
1530        synchronized boolean hasLocks() {
1531            return !mList.isEmpty();
1532        }
1533
1534        synchronized int getStrongestLockMode() {
1535            if (mList.isEmpty()) {
1536                return WifiManager.WIFI_MODE_FULL;
1537            }
1538
1539            if (mFullHighPerfLocksAcquired > mFullHighPerfLocksReleased) {
1540                return WifiManager.WIFI_MODE_FULL_HIGH_PERF;
1541            }
1542
1543            if (mFullLocksAcquired > mFullLocksReleased) {
1544                return WifiManager.WIFI_MODE_FULL;
1545            }
1546
1547            return WifiManager.WIFI_MODE_SCAN_ONLY;
1548        }
1549
1550        synchronized void updateWorkSource(WorkSource ws) {
1551            for (int i = 0; i < mLocks.mList.size(); i++) {
1552                ws.add(mLocks.mList.get(i).mWorkSource);
1553            }
1554        }
1555
1556        private void addLock(WifiLock lock) {
1557            if (findLockByBinder(lock.mBinder) < 0) {
1558                mList.add(lock);
1559            }
1560        }
1561
1562        private WifiLock removeLock(IBinder binder) {
1563            int index = findLockByBinder(binder);
1564            if (index >= 0) {
1565                WifiLock ret = mList.remove(index);
1566                ret.unlinkDeathRecipient();
1567                return ret;
1568            } else {
1569                return null;
1570            }
1571        }
1572
1573        private int findLockByBinder(IBinder binder) {
1574            int size = mList.size();
1575            for (int i = size - 1; i >= 0; i--) {
1576                if (mList.get(i).mBinder == binder)
1577                    return i;
1578            }
1579            return -1;
1580        }
1581
1582        private void dump(PrintWriter pw) {
1583            for (WifiLock l : mList) {
1584                pw.print("    ");
1585                pw.println(l);
1586            }
1587        }
1588    }
1589
1590    void enforceWakeSourcePermission(int uid, int pid) {
1591        if (uid == android.os.Process.myUid()) {
1592            return;
1593        }
1594        mContext.enforcePermission(android.Manifest.permission.UPDATE_DEVICE_STATS,
1595                pid, uid, null);
1596    }
1597
1598    public boolean acquireWifiLock(IBinder binder, int lockMode, String tag, WorkSource ws) {
1599        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null);
1600        if (lockMode != WifiManager.WIFI_MODE_FULL &&
1601                lockMode != WifiManager.WIFI_MODE_SCAN_ONLY &&
1602                lockMode != WifiManager.WIFI_MODE_FULL_HIGH_PERF) {
1603            Slog.e(TAG, "Illegal argument, lockMode= " + lockMode);
1604            if (DBG) throw new IllegalArgumentException("lockMode=" + lockMode);
1605            return false;
1606        }
1607        if (ws != null && ws.size() == 0) {
1608            ws = null;
1609        }
1610        if (ws != null) {
1611            enforceWakeSourcePermission(Binder.getCallingUid(), Binder.getCallingPid());
1612        }
1613        if (ws == null) {
1614            ws = new WorkSource(Binder.getCallingUid());
1615        }
1616        WifiLock wifiLock = new WifiLock(lockMode, tag, binder, ws);
1617        synchronized (mLocks) {
1618            return acquireWifiLockLocked(wifiLock);
1619        }
1620    }
1621
1622    private void noteAcquireWifiLock(WifiLock wifiLock) throws RemoteException {
1623        switch(wifiLock.mMode) {
1624            case WifiManager.WIFI_MODE_FULL:
1625            case WifiManager.WIFI_MODE_FULL_HIGH_PERF:
1626            case WifiManager.WIFI_MODE_SCAN_ONLY:
1627                mBatteryStats.noteFullWifiLockAcquiredFromSource(wifiLock.mWorkSource);
1628                break;
1629        }
1630    }
1631
1632    private void noteReleaseWifiLock(WifiLock wifiLock) throws RemoteException {
1633        switch(wifiLock.mMode) {
1634            case WifiManager.WIFI_MODE_FULL:
1635            case WifiManager.WIFI_MODE_FULL_HIGH_PERF:
1636            case WifiManager.WIFI_MODE_SCAN_ONLY:
1637                mBatteryStats.noteFullWifiLockReleasedFromSource(wifiLock.mWorkSource);
1638                break;
1639        }
1640    }
1641
1642    private boolean acquireWifiLockLocked(WifiLock wifiLock) {
1643        if (DBG) Slog.d(TAG, "acquireWifiLockLocked: " + wifiLock);
1644
1645        mLocks.addLock(wifiLock);
1646
1647        long ident = Binder.clearCallingIdentity();
1648        try {
1649            noteAcquireWifiLock(wifiLock);
1650            switch(wifiLock.mMode) {
1651            case WifiManager.WIFI_MODE_FULL:
1652                ++mFullLocksAcquired;
1653                break;
1654            case WifiManager.WIFI_MODE_FULL_HIGH_PERF:
1655                ++mFullHighPerfLocksAcquired;
1656                break;
1657
1658            case WifiManager.WIFI_MODE_SCAN_ONLY:
1659                ++mScanLocksAcquired;
1660                break;
1661            }
1662            mWifiController.sendMessage(CMD_LOCKS_CHANGED);
1663            return true;
1664        } catch (RemoteException e) {
1665            return false;
1666        } finally {
1667            Binder.restoreCallingIdentity(ident);
1668        }
1669    }
1670
1671    public void updateWifiLockWorkSource(IBinder lock, WorkSource ws) {
1672        int uid = Binder.getCallingUid();
1673        int pid = Binder.getCallingPid();
1674        if (ws != null && ws.size() == 0) {
1675            ws = null;
1676        }
1677        if (ws != null) {
1678            enforceWakeSourcePermission(uid, pid);
1679        }
1680        long ident = Binder.clearCallingIdentity();
1681        try {
1682            synchronized (mLocks) {
1683                int index = mLocks.findLockByBinder(lock);
1684                if (index < 0) {
1685                    throw new IllegalArgumentException("Wifi lock not active");
1686                }
1687                WifiLock wl = mLocks.mList.get(index);
1688                noteReleaseWifiLock(wl);
1689                wl.mWorkSource = ws != null ? new WorkSource(ws) : new WorkSource(uid);
1690                noteAcquireWifiLock(wl);
1691            }
1692        } catch (RemoteException e) {
1693        } finally {
1694            Binder.restoreCallingIdentity(ident);
1695        }
1696    }
1697
1698    public boolean releaseWifiLock(IBinder lock) {
1699        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null);
1700        synchronized (mLocks) {
1701            return releaseWifiLockLocked(lock);
1702        }
1703    }
1704
1705    private boolean releaseWifiLockLocked(IBinder lock) {
1706        boolean hadLock;
1707
1708        WifiLock wifiLock = mLocks.removeLock(lock);
1709
1710        if (DBG) Slog.d(TAG, "releaseWifiLockLocked: " + wifiLock);
1711
1712        hadLock = (wifiLock != null);
1713
1714        long ident = Binder.clearCallingIdentity();
1715        try {
1716            if (hadLock) {
1717                noteReleaseWifiLock(wifiLock);
1718                switch(wifiLock.mMode) {
1719                    case WifiManager.WIFI_MODE_FULL:
1720                        ++mFullLocksReleased;
1721                        break;
1722                    case WifiManager.WIFI_MODE_FULL_HIGH_PERF:
1723                        ++mFullHighPerfLocksReleased;
1724                        break;
1725                    case WifiManager.WIFI_MODE_SCAN_ONLY:
1726                        ++mScanLocksReleased;
1727                        break;
1728                }
1729                mWifiController.sendMessage(CMD_LOCKS_CHANGED);
1730            }
1731        } catch (RemoteException e) {
1732        } finally {
1733            Binder.restoreCallingIdentity(ident);
1734        }
1735
1736        return hadLock;
1737    }
1738
1739    private abstract class DeathRecipient
1740            implements IBinder.DeathRecipient {
1741        String mTag;
1742        int mUid;
1743        IBinder mBinder;
1744
1745        DeathRecipient(String tag, IBinder binder) {
1746            super();
1747            mTag = tag;
1748            mUid = Binder.getCallingUid();
1749            mBinder = binder;
1750            try {
1751                mBinder.linkToDeath(this, 0);
1752            } catch (RemoteException e) {
1753                binderDied();
1754            }
1755        }
1756
1757        void unlinkDeathRecipient() {
1758            mBinder.unlinkToDeath(this, 0);
1759        }
1760
1761        public int getUid() {
1762            return mUid;
1763        }
1764    }
1765
1766    private class Multicaster extends DeathRecipient {
1767        Multicaster(String tag, IBinder binder) {
1768            super(tag, binder);
1769        }
1770
1771        public void binderDied() {
1772            Slog.e(TAG, "Multicaster binderDied");
1773            synchronized (mMulticasters) {
1774                int i = mMulticasters.indexOf(this);
1775                if (i != -1) {
1776                    removeMulticasterLocked(i, mUid);
1777                }
1778            }
1779        }
1780
1781        public String toString() {
1782            return "Multicaster{" + mTag + " uid=" + mUid  + "}";
1783        }
1784    }
1785
1786    public void initializeMulticastFiltering() {
1787        enforceMulticastChangePermission();
1788
1789        synchronized (mMulticasters) {
1790            // if anybody had requested filters be off, leave off
1791            if (mMulticasters.size() != 0) {
1792                return;
1793            } else {
1794                mWifiStateMachine.startFilteringMulticastPackets();
1795            }
1796        }
1797    }
1798
1799    public void acquireMulticastLock(IBinder binder, String tag) {
1800        enforceMulticastChangePermission();
1801
1802        synchronized (mMulticasters) {
1803            mMulticastEnabled++;
1804            mMulticasters.add(new Multicaster(tag, binder));
1805            // Note that we could call stopFilteringMulticastPackets only when
1806            // our new size == 1 (first call), but this function won't
1807            // be called often and by making the stopPacket call each
1808            // time we're less fragile and self-healing.
1809            mWifiStateMachine.stopFilteringMulticastPackets();
1810        }
1811
1812        int uid = Binder.getCallingUid();
1813        final long ident = Binder.clearCallingIdentity();
1814        try {
1815            mBatteryStats.noteWifiMulticastEnabled(uid);
1816        } catch (RemoteException e) {
1817        } finally {
1818            Binder.restoreCallingIdentity(ident);
1819        }
1820    }
1821
1822    public void releaseMulticastLock() {
1823        enforceMulticastChangePermission();
1824
1825        int uid = Binder.getCallingUid();
1826        synchronized (mMulticasters) {
1827            mMulticastDisabled++;
1828            int size = mMulticasters.size();
1829            for (int i = size - 1; i >= 0; i--) {
1830                Multicaster m = mMulticasters.get(i);
1831                if ((m != null) && (m.getUid() == uid)) {
1832                    removeMulticasterLocked(i, uid);
1833                }
1834            }
1835        }
1836    }
1837
1838    private void removeMulticasterLocked(int i, int uid)
1839    {
1840        Multicaster removed = mMulticasters.remove(i);
1841
1842        if (removed != null) {
1843            removed.unlinkDeathRecipient();
1844        }
1845        if (mMulticasters.size() == 0) {
1846            mWifiStateMachine.startFilteringMulticastPackets();
1847        }
1848
1849        final long ident = Binder.clearCallingIdentity();
1850        try {
1851            mBatteryStats.noteWifiMulticastDisabled(uid);
1852        } catch (RemoteException e) {
1853        } finally {
1854            Binder.restoreCallingIdentity(ident);
1855        }
1856    }
1857
1858    public boolean isMulticastEnabled() {
1859        enforceAccessPermission();
1860
1861        synchronized (mMulticasters) {
1862            return (mMulticasters.size() > 0);
1863        }
1864    }
1865
1866    public void enableVerboseLogging(int verbose) {
1867        enforceAccessPermission();
1868        mWifiStateMachine.enableVerboseLogging(verbose);
1869    }
1870
1871    public int getVerboseLoggingLevel() {
1872        enforceAccessPermission();
1873        return mWifiStateMachine.getVerboseLoggingLevel();
1874    }
1875
1876    public void enableAggressiveHandover(int enabled) {
1877        enforceAccessPermission();
1878        mWifiStateMachine.enableAggressiveHandover(enabled);
1879    }
1880
1881    public int getAggressiveHandover() {
1882        enforceAccessPermission();
1883        return mWifiStateMachine.getAggressiveHandover();
1884    }
1885
1886    public void setAllowScansWithTraffic(int enabled) {
1887        enforceAccessPermission();
1888        mWifiStateMachine.setAllowScansWithTraffic(enabled);
1889    }
1890
1891    public int getAllowScansWithTraffic() {
1892        enforceAccessPermission();
1893        return mWifiStateMachine.getAllowScansWithTraffic();
1894    }
1895
1896    public boolean enableAutoJoinWhenAssociated(boolean enabled) {
1897        enforceChangePermission();
1898        return mWifiStateMachine.enableAutoJoinWhenAssociated(enabled);
1899    }
1900
1901    public boolean getEnableAutoJoinWhenAssociated() {
1902        enforceAccessPermission();
1903        return mWifiStateMachine.getEnableAutoJoinWhenAssociated();
1904    }
1905    public void setHalBasedAutojoinOffload(int enabled) {
1906        enforceConnectivityInternalPermission();
1907        mWifiStateMachine.setHalBasedAutojoinOffload(enabled);
1908    }
1909
1910    public int getHalBasedAutojoinOffload() {
1911        enforceAccessPermission();
1912        return mWifiStateMachine.getHalBasedAutojoinOffload();
1913    }
1914
1915    /* Return the Wifi Connection statistics object */
1916    public WifiConnectionStatistics getConnectionStatistics() {
1917        enforceAccessPermission();
1918        enforceReadCredentialPermission();
1919        if (mWifiStateMachineChannel != null) {
1920            return mWifiStateMachine.syncGetConnectionStatistics(mWifiStateMachineChannel);
1921        } else {
1922            Slog.e(TAG, "mWifiStateMachineChannel is not initialized");
1923            return null;
1924        }
1925    }
1926
1927    public void factoryReset() {
1928        enforceConnectivityInternalPermission();
1929
1930        if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) {
1931            return;
1932        }
1933
1934        if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) {
1935            // Turn mobile hotspot off
1936            setWifiApEnabled(null, false);
1937        }
1938
1939        if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_WIFI)) {
1940            // Enable wifi
1941            setWifiEnabled(true);
1942            // Delete all Wifi SSIDs
1943            List<WifiConfiguration> networks = getConfiguredNetworks();
1944            if (networks != null) {
1945                for (WifiConfiguration config : networks) {
1946                    removeNetwork(config.networkId);
1947                }
1948                saveConfiguration();
1949            }
1950        }
1951    }
1952
1953    /* private methods */
1954    static boolean logAndReturnFalse(String s) {
1955        Log.d(TAG, s);
1956        return false;
1957    }
1958
1959    public static boolean isValid(WifiConfiguration config) {
1960        String validity = checkValidity(config);
1961        return validity == null || logAndReturnFalse(validity);
1962    }
1963
1964    public static boolean isValidPasspoint(WifiConfiguration config) {
1965        String validity = checkPasspointValidity(config);
1966        return validity == null || logAndReturnFalse(validity);
1967    }
1968
1969    public static String checkValidity(WifiConfiguration config) {
1970        if (config.allowedKeyManagement == null)
1971            return "allowed kmgmt";
1972
1973        if (config.allowedKeyManagement.cardinality() > 1) {
1974            if (config.allowedKeyManagement.cardinality() != 2) {
1975                return "cardinality != 2";
1976            }
1977            if (!config.allowedKeyManagement.get(WifiConfiguration.KeyMgmt.WPA_EAP)) {
1978                return "not WPA_EAP";
1979            }
1980            if ((!config.allowedKeyManagement.get(WifiConfiguration.KeyMgmt.IEEE8021X))
1981                    && (!config.allowedKeyManagement.get(WifiConfiguration.KeyMgmt.WPA_PSK))) {
1982                return "not PSK or 8021X";
1983            }
1984        }
1985        return null;
1986    }
1987
1988    public static String checkPasspointValidity(WifiConfiguration config) {
1989        if (!TextUtils.isEmpty(config.FQDN)) {
1990            /* this is passpoint configuration; it must not have an SSID */
1991            if (!TextUtils.isEmpty(config.SSID)) {
1992                return "SSID not expected for Passpoint: '" + config.SSID +
1993                        "' FQDN " + toHexString(config.FQDN);
1994            }
1995            /* this is passpoint configuration; it must have a providerFriendlyName */
1996            if (TextUtils.isEmpty(config.providerFriendlyName)) {
1997                return "no provider friendly name";
1998            }
1999            WifiEnterpriseConfig enterpriseConfig = config.enterpriseConfig;
2000            /* this is passpoint configuration; it must have enterprise config */
2001            if (enterpriseConfig == null
2002                    || enterpriseConfig.getEapMethod() == WifiEnterpriseConfig.Eap.NONE ) {
2003                return "no enterprise config";
2004            }
2005            if ((enterpriseConfig.getEapMethod() == WifiEnterpriseConfig.Eap.TLS ||
2006                    enterpriseConfig.getEapMethod() == WifiEnterpriseConfig.Eap.TTLS ||
2007                    enterpriseConfig.getEapMethod() == WifiEnterpriseConfig.Eap.PEAP) &&
2008                    enterpriseConfig.getCaCertificate() == null) {
2009                return "no CA certificate";
2010            }
2011        }
2012        return null;
2013    }
2014
2015    public Network getCurrentNetwork() {
2016        enforceAccessPermission();
2017        return mWifiStateMachine.getCurrentNetwork();
2018    }
2019
2020    public static String toHexString(String s) {
2021        if (s == null) {
2022            return "null";
2023        }
2024        StringBuilder sb = new StringBuilder();
2025        sb.append('\'').append(s).append('\'');
2026        for (int n = 0; n < s.length(); n++) {
2027            sb.append(String.format(" %02x", s.charAt(n) & 0xffff));
2028        }
2029        return sb.toString();
2030    }
2031
2032    /**
2033     * Checks that calling process has android.Manifest.permission.ACCESS_COARSE_LOCATION or
2034     * android.Manifest.permission.ACCESS_FINE_LOCATION and a corresponding app op is allowed
2035     */
2036    private boolean checkCallerCanAccessScanResults(String callingPackage, int uid) {
2037        if (ActivityManager.checkUidPermission(Manifest.permission.ACCESS_FINE_LOCATION, uid)
2038                == PackageManager.PERMISSION_GRANTED
2039                && checkAppOppAllowed(AppOpsManager.OP_FINE_LOCATION, callingPackage, uid)) {
2040            return true;
2041        }
2042
2043        if (ActivityManager.checkUidPermission(Manifest.permission.ACCESS_COARSE_LOCATION, uid)
2044                == PackageManager.PERMISSION_GRANTED
2045                && checkAppOppAllowed(AppOpsManager.OP_COARSE_LOCATION, callingPackage, uid)) {
2046            return true;
2047        }
2048        boolean apiLevel23App = isMApp(mContext, callingPackage);
2049        // Pre-M apps running in the foreground should continue getting scan results
2050        if (!apiLevel23App && isForegroundApp(callingPackage)) {
2051            return true;
2052        }
2053        Log.e(TAG, "Permission denial: Need ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION "
2054                + "permission to get scan results");
2055        return false;
2056    }
2057
2058    private boolean checkAppOppAllowed(int op, String callingPackage, int uid) {
2059        return mAppOps.noteOp(op, uid, callingPackage) == AppOpsManager.MODE_ALLOWED;
2060    }
2061
2062    private static boolean isMApp(Context context, String pkgName) {
2063        try {
2064            return context.getPackageManager().getApplicationInfo(pkgName, 0)
2065                    .targetSdkVersion >= Build.VERSION_CODES.M;
2066        } catch (PackageManager.NameNotFoundException e) {
2067            // In case of exception, assume M app (more strict checking)
2068        }
2069        return true;
2070    }
2071
2072    public void hideCertFromUnaffiliatedUsers(String alias) {
2073        mCertManager.hideCertFromUnaffiliatedUsers(alias);
2074    }
2075
2076    public String[] listClientCertsForCurrentUser() {
2077        return mCertManager.listClientCertsForCurrentUser();
2078    }
2079
2080    /**
2081     * Return true if the specified package name is a foreground app.
2082     *
2083     * @param pkgName application package name.
2084     */
2085    private boolean isForegroundApp(String pkgName) {
2086        ActivityManager am = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);
2087        List<ActivityManager.RunningTaskInfo> tasks = am.getRunningTasks(1);
2088        return !tasks.isEmpty() && pkgName.equals(tasks.get(0).topActivity.getPackageName());
2089    }
2090
2091}
2092