services/java/com/android/server/ConnectivityService.java

   1 /*
   2  * Copyright (C) 2008 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
  17 package com.android.server;
  18
  19 import android.bluetooth.BluetoothTetheringDataTracker;
  20 import android.content.ContentResolver;
  21 import android.content.Context;
  22 import android.content.Intent;
  23 import android.content.pm.PackageManager;
  24 import android.database.ContentObserver;
  25 import android.net.ConnectivityManager;
  26 import android.net.DummyDataStateTracker;
  27 import android.net.EthernetDataTracker;
  28 import android.net.IConnectivityManager;
  29 import android.net.LinkAddress;
  30 import android.net.LinkProperties;
  31 import android.net.MobileDataStateTracker;
  32 import android.net.NetworkConfig;
  33 import android.net.NetworkInfo;
  34 import android.net.NetworkStateTracker;
  35 import android.net.NetworkUtils;
  36 import android.net.Proxy;
  37 import android.net.ProxyProperties;
  38 import android.net.RouteInfo;
  39 import android.net.vpn.VpnManager;
  40 import android.net.wifi.WifiStateTracker;
  41 import android.os.Binder;
  42 import android.os.Handler;
  43 import android.os.HandlerThread;
  44 import android.os.IBinder;
  45 import android.os.INetworkManagementService;
  46 import android.os.Looper;
  47 import android.os.Message;
  48 import android.os.PowerManager;
  49 import android.os.RemoteException;
  50 import android.os.ServiceManager;
  51 import android.os.SystemProperties;
  52 import android.provider.Settings;
  53 import android.text.TextUtils;
  54 import android.util.EventLog;
  55 import android.util.Slog;
  56
  57 import com.android.internal.telephony.Phone;
  58 import com.android.server.connectivity.Tethering;
  59
  60 import java.io.FileDescriptor;
  61 import java.io.FileWriter;
  62 import java.io.IOException;
  63 import java.io.PrintWriter;
  64 import java.net.InetAddress;
  65 import java.net.Inet4Address;
  66 import java.net.UnknownHostException;
  67 import java.util.ArrayList;
  68 import java.util.Collection;
  69 import java.util.concurrent.atomic.AtomicBoolean;
  70 import java.util.GregorianCalendar;
  71 import java.util.List;
  72
  73 /**
  74  * @hide
  75  */
  76 public class ConnectivityService extends IConnectivityManager.Stub {
  77
  78     private static final boolean DBG = true;
  79     private static final String TAG = "ConnectivityService";
  80
  81     // how long to wait before switching back to a radio's default network
  82     private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000;
  83     // system property that can override the above value
  84     private static final String NETWORK_RESTORE_DELAY_PROP_NAME =
  85             "android.telephony.apn-restore";
  86
  87     // used in recursive route setting to add gateways for the host for which
  88     // a host route was requested.
  89     private static final int MAX_HOSTROUTE_CYCLE_COUNT = 10;
  90
  91     private Tethering mTethering;
  92     private boolean mTetheringConfigValid = false;
  93
  94     /**
  95      * Sometimes we want to refer to the individual network state
  96      * trackers separately, and sometimes we just want to treat them
  97      * abstractly.
  98      */
  99     private NetworkStateTracker mNetTrackers[];
 100
 101     /**
 102      * A per Net list of the PID's that requested access to the net
 103      * used both as a refcount and for per-PID DNS selection
 104      */
 105     private List mNetRequestersPids[];
 106
 107     private WifiWatchdogService mWifiWatchdogService;
 108
 109     // priority order of the nettrackers
 110     // (excluding dynamically set mNetworkPreference)
 111     // TODO - move mNetworkTypePreference into this
 112     private int[] mPriorityList;
 113
 114     private Context mContext;
 115     private int mNetworkPreference;
 116     private int mActiveDefaultNetwork = -1;
 117     // 0 is full bad, 100 is full good
 118     private int mDefaultInetCondition = 0;
 119     private int mDefaultInetConditionPublished = 0;
 120     private boolean mInetConditionChangeInFlight = false;
 121     private int mDefaultConnectionSequence = 0;
 122
 123     private int mNumDnsEntries;
 124
 125     private boolean mTestMode;
 126     private static ConnectivityService sServiceInstance;
 127
 128     private AtomicBoolean mBackgroundDataEnabled = new AtomicBoolean(true);
 129
 130     private INetworkManagementService mNetd;
 131
 132     private static final int ENABLED  = 1;
 133     private static final int DISABLED = 0;
 134
 135     // Share the event space with NetworkStateTracker (which can't see this
 136     // internal class but sends us events).  If you change these, change
 137     // NetworkStateTracker.java too.
 138     private static final int MIN_NETWORK_STATE_TRACKER_EVENT = 1;
 139     private static final int MAX_NETWORK_STATE_TRACKER_EVENT = 100;
 140
 141     /**
 142      * used internally as a delayed event to make us switch back to the
 143      * default network
 144      */
 145     private static final int EVENT_RESTORE_DEFAULT_NETWORK =
 146             MAX_NETWORK_STATE_TRACKER_EVENT + 1;
 147
 148     /**
 149      * used internally to change our mobile data enabled flag
 150      */
 151     private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED =
 152             MAX_NETWORK_STATE_TRACKER_EVENT + 2;
 153
 154     /**
 155      * used internally to change our network preference setting
 156      * arg1 = networkType to prefer
 157      */
 158     private static final int EVENT_SET_NETWORK_PREFERENCE =
 159             MAX_NETWORK_STATE_TRACKER_EVENT + 3;
 160
 161     /**
 162      * used internally to synchronize inet condition reports
 163      * arg1 = networkType
 164      * arg2 = condition (0 bad, 100 good)
 165      */
 166     private static final int EVENT_INET_CONDITION_CHANGE =
 167             MAX_NETWORK_STATE_TRACKER_EVENT + 4;
 168
 169     /**
 170      * used internally to mark the end of inet condition hold periods
 171      * arg1 = networkType
 172      */
 173     private static final int EVENT_INET_CONDITION_HOLD_END =
 174             MAX_NETWORK_STATE_TRACKER_EVENT + 5;
 175
 176     /**
 177      * used internally to set the background data preference
 178      * arg1 = TRUE for enabled, FALSE for disabled
 179      */
 180     private static final int EVENT_SET_BACKGROUND_DATA =
 181             MAX_NETWORK_STATE_TRACKER_EVENT + 6;
 182
 183     /**
 184      * used internally to set enable/disable cellular data
 185      * arg1 = ENBALED or DISABLED
 186      */
 187     private static final int EVENT_SET_MOBILE_DATA =
 188             MAX_NETWORK_STATE_TRACKER_EVENT + 7;
 189
 190     /**
 191      * used internally to clear a wakelock when transitioning
 192      * from one net to another
 193      */
 194     private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK =
 195             MAX_NETWORK_STATE_TRACKER_EVENT + 8;
 196
 197     /**
 198      * used internally to reload global proxy settings
 199      */
 200     private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY =
 201             MAX_NETWORK_STATE_TRACKER_EVENT + 9;
 202
 203     /**
 204      * used internally to set external dependency met/unmet
 205      * arg1 = ENABLED (met) or DISABLED (unmet)
 206      * arg2 = NetworkType
 207      */
 208     private static final int EVENT_SET_DEPENDENCY_MET =
 209             MAX_NETWORK_STATE_TRACKER_EVENT + 10;
 210
 211     private Handler mHandler;
 212
 213     // list of DeathRecipients used to make sure features are turned off when
 214     // a process dies
 215     private List mFeatureUsers;
 216
 217     private boolean mSystemReady;
 218     private Intent mInitialBroadcast;
 219
 220     private PowerManager.WakeLock mNetTransitionWakeLock;
 221     private String mNetTransitionWakeLockCausedBy = "";
 222     private int mNetTransitionWakeLockSerialNumber;
 223     private int mNetTransitionWakeLockTimeout;
 224
 225     private InetAddress mDefaultDns;
 226
 227     // used in DBG mode to track inet condition reports
 228     private static final int INET_CONDITION_LOG_MAX_SIZE = 15;
 229     private ArrayList mInetLog;
 230
 231     // track the current default http proxy - tell the world if we get a new one (real change)
 232     private ProxyProperties mDefaultProxy = null;
 233     // track the global proxy.
 234     private ProxyProperties mGlobalProxy = null;
 235     private final Object mGlobalProxyLock = new Object();
 236
 237     private SettingsObserver mSettingsObserver;
 238
 239     NetworkConfig[] mNetConfigs;
 240     int mNetworksDefined;
 241
 242     private static class RadioAttributes {
 243         public int mSimultaneity;
 244         public int mType;
 245         public RadioAttributes(String init) {
 246             String fragments[] = init.split(",");
 247             mType = Integer.parseInt(fragments[0]);
 248             mSimultaneity = Integer.parseInt(fragments[1]);
 249         }
 250     }
 251     RadioAttributes[] mRadioAttributes;
 252
 253     public static synchronized ConnectivityService getInstance(Context context) {
 254         if (sServiceInstance == null) {
 255             sServiceInstance = new ConnectivityService(context);
 256         }
 257         return sServiceInstance;
 258     }
 259
 260     private ConnectivityService(Context context) {
 261         if (DBG) log("ConnectivityService starting up");
 262
 263         HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread");
 264         handlerThread.start();
 265         mHandler = new MyHandler(handlerThread.getLooper());
 266
 267         mBackgroundDataEnabled.set(Settings.Secure.getInt(context.getContentResolver(),
 268                 Settings.Secure.BACKGROUND_DATA, 1) == 1);
 269
 270         // setup our unique device name
 271         if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) {
 272             String id = Settings.Secure.getString(context.getContentResolver(),
 273                     Settings.Secure.ANDROID_ID);
 274             if (id != null && id.length() > 0) {
 275                 String name = new String("android_").concat(id);
 276                 SystemProperties.set("net.hostname", name);
 277             }
 278         }
 279
 280         // read our default dns server ip
 281         String dns = Settings.Secure.getString(context.getContentResolver(),
 282                 Settings.Secure.DEFAULT_DNS_SERVER);
 283         if (dns == null || dns.length() == 0) {
 284             dns = context.getResources().getString(
 285                     com.android.internal.R.string.config_default_dns_server);
 286         }
 287         try {
 288             mDefaultDns = NetworkUtils.numericToInetAddress(dns);
 289         } catch (IllegalArgumentException e) {
 290             loge("Error setting defaultDns using " + dns);
 291         }
 292
 293         mContext = context;
 294
 295         PowerManager powerManager = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
 296         mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
 297         mNetTransitionWakeLockTimeout = mContext.getResources().getInteger(
 298                 com.android.internal.R.integer.config_networkTransitionTimeout);
 299
 300         mNetTrackers = new NetworkStateTracker[
 301                 ConnectivityManager.MAX_NETWORK_TYPE+1];
 302
 303         mNetworkPreference = getPersistedNetworkPreference();
 304
 305         mRadioAttributes = new RadioAttributes[ConnectivityManager.MAX_RADIO_TYPE+1];
 306         mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1];
 307
 308         // Load device network attributes from resources
 309         String[] raStrings = context.getResources().getStringArray(
 310                 com.android.internal.R.array.radioAttributes);
 311         for (String raString : raStrings) {
 312             RadioAttributes r = new RadioAttributes(raString);
 313             if (r.mType > ConnectivityManager.MAX_RADIO_TYPE) {
 314                 loge("Error in radioAttributes - ignoring attempt to define type " + r.mType);
 315                 continue;
 316             }
 317             if (mRadioAttributes[r.mType] != null) {
 318                 loge("Error in radioAttributes - ignoring attempt to redefine type " +
 319                         r.mType);
 320                 continue;
 321             }
 322             mRadioAttributes[r.mType] = r;
 323         }
 324
 325         String[] naStrings = context.getResources().getStringArray(
 326                 com.android.internal.R.array.networkAttributes);
 327         for (String naString : naStrings) {
 328             try {
 329                 NetworkConfig n = new NetworkConfig(naString);
 330                 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) {
 331                     loge("Error in networkAttributes - ignoring attempt to define type " +
 332                             n.type);
 333                     continue;
 334                 }
 335                 if (mNetConfigs[n.type] != null) {
 336                     loge("Error in networkAttributes - ignoring attempt to redefine type " +
 337                             n.type);
 338                     continue;
 339                 }
 340                 if (mRadioAttributes[n.radio] == null) {
 341                     loge("Error in networkAttributes - ignoring attempt to use undefined " +
 342                             "radio " + n.radio + " in network type " + n.type);
 343                     continue;
 344                 }
 345                 mNetConfigs[n.type] = n;
 346                 mNetworksDefined++;
 347             } catch(Exception e) {
 348                 // ignore it - leave the entry null
 349             }
 350         }
 351
 352         // high priority first
 353         mPriorityList = new int[mNetworksDefined];
 354         {
 355             int insertionPoint = mNetworksDefined-1;
 356             int currentLowest = 0;
 357             int nextLowest = 0;
 358             while (insertionPoint > -1) {
 359                 for (NetworkConfig na : mNetConfigs) {
 360                     if (na == null) continue;
 361                     if (na.priority < currentLowest) continue;
 362                     if (na.priority > currentLowest) {
 363                         if (na.priority < nextLowest || nextLowest == 0) {
 364                             nextLowest = na.priority;
 365                         }
 366                         continue;
 367                     }
 368                     mPriorityList[insertionPoint--] = na.type;
 369                 }
 370                 currentLowest = nextLowest;
 371                 nextLowest = 0;
 372             }
 373         }
 374
 375         mNetRequestersPids = new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE+1];
 376         for (int i : mPriorityList) {
 377             mNetRequestersPids[i] = new ArrayList();
 378         }
 379
 380         mFeatureUsers = new ArrayList();
 381
 382         mNumDnsEntries = 0;
 383
 384         mTestMode = SystemProperties.get("cm.test.mode").equals("true")
 385                 && SystemProperties.get("ro.build.type").equals("eng");
 386         /*
 387          * Create the network state trackers for Wi-Fi and mobile
 388          * data. Maybe this could be done with a factory class,
 389          * but it's not clear that it's worth it, given that
 390          * the number of different network types is not going
 391          * to change very often.
 392          */
 393         for (int netType : mPriorityList) {
 394             switch (mNetConfigs[netType].radio) {
 395             case ConnectivityManager.TYPE_WIFI:
 396                 if (DBG) log("Starting Wifi Service.");
 397                 WifiStateTracker wst = new WifiStateTracker();
 398                 WifiService wifiService = new WifiService(context);
 399                 ServiceManager.addService(Context.WIFI_SERVICE, wifiService);
 400                 wifiService.checkAndStartWifi();
 401                 mNetTrackers[ConnectivityManager.TYPE_WIFI] = wst;
 402                 wst.startMonitoring(context, mHandler);
 403
 404                 //TODO: as part of WWS refactor, create only when needed
 405                 mWifiWatchdogService = new WifiWatchdogService(context);
 406
 407                 break;
 408             case ConnectivityManager.TYPE_MOBILE:
 409                 mNetTrackers[netType] = new MobileDataStateTracker(netType,
 410                         mNetConfigs[netType].name);
 411                 mNetTrackers[netType].startMonitoring(context, mHandler);
 412                 break;
 413             case ConnectivityManager.TYPE_DUMMY:
 414                 mNetTrackers[netType] = new DummyDataStateTracker(netType,
 415                         mNetConfigs[netType].name);
 416                 mNetTrackers[netType].startMonitoring(context, mHandler);
 417                 break;
 418             case ConnectivityManager.TYPE_BLUETOOTH:
 419                 mNetTrackers[netType] = BluetoothTetheringDataTracker.getInstance();
 420                 mNetTrackers[netType].startMonitoring(context, mHandler);
 421                 break;
 422             case ConnectivityManager.TYPE_ETHERNET:
 423                 mNetTrackers[netType] = EthernetDataTracker.getInstance();
 424                 mNetTrackers[netType].startMonitoring(context, mHandler);
 425                 break;
 426             default:
 427                 loge("Trying to create a DataStateTracker for an unknown radio type " +
 428                         mNetConfigs[netType].radio);
 429                 continue;
 430             }
 431         }
 432
 433         mTethering = new Tethering(mContext, mHandler.getLooper());
 434         mTetheringConfigValid = (((mNetTrackers[ConnectivityManager.TYPE_MOBILE_DUN] != null) ||
 435                                   !mTethering.isDunRequired()) &&
 436                                  (mTethering.getTetherableUsbRegexs().length != 0 ||
 437                                   mTethering.getTetherableWifiRegexs().length != 0 ||
 438                                   mTethering.getTetherableBluetoothRegexs().length != 0) &&
 439                                  mTethering.getUpstreamIfaceRegexs().length != 0);
 440
 441         if (DBG) {
 442             mInetLog = new ArrayList();
 443         }
 444
 445         mSettingsObserver = new SettingsObserver(mHandler, EVENT_APPLY_GLOBAL_HTTP_PROXY);
 446         mSettingsObserver.observe(mContext);
 447
 448         loadGlobalProxy();
 449
 450         VpnManager.startVpnService(context);
 451     }
 452
 453
 454     /**
 455      * Sets the preferred network.
 456      * @param preference the new preference
 457      */
 458     public void setNetworkPreference(int preference) {
 459         enforceChangePermission();
 460
 461         mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_NETWORK_PREFERENCE, preference, 0));
 462     }
 463
 464     public int getNetworkPreference() {
 465         enforceAccessPermission();
 466         int preference;
 467         synchronized(this) {
 468             preference = mNetworkPreference;
 469         }
 470         return preference;
 471     }
 472
 473     private void handleSetNetworkPreference(int preference) {
 474         if (ConnectivityManager.isNetworkTypeValid(preference) &&
 475                 mNetConfigs[preference] != null &&
 476                 mNetConfigs[preference].isDefault()) {
 477             if (mNetworkPreference != preference) {
 478                 final ContentResolver cr = mContext.getContentResolver();
 479                 Settings.Secure.putInt(cr, Settings.Secure.NETWORK_PREFERENCE, preference);
 480                 synchronized(this) {
 481                     mNetworkPreference = preference;
 482                 }
 483                 enforcePreference();
 484             }
 485         }
 486     }
 487
 488     private int getPersistedNetworkPreference() {
 489         final ContentResolver cr = mContext.getContentResolver();
 490
 491         final int networkPrefSetting = Settings.Secure
 492                 .getInt(cr, Settings.Secure.NETWORK_PREFERENCE, -1);
 493         if (networkPrefSetting != -1) {
 494             return networkPrefSetting;
 495         }
 496
 497         return ConnectivityManager.DEFAULT_NETWORK_PREFERENCE;
 498     }
 499
 500     /**
 501      * Make the state of network connectivity conform to the preference settings
 502      * In this method, we only tear down a non-preferred network. Establishing
 503      * a connection to the preferred network is taken care of when we handle
 504      * the disconnect event from the non-preferred network
 505      * (see {@link #handleDisconnect(NetworkInfo)}).
 506      */
 507     private void enforcePreference() {
 508         if (mNetTrackers[mNetworkPreference].getNetworkInfo().isConnected())
 509             return;
 510
 511         if (!mNetTrackers[mNetworkPreference].isAvailable())
 512             return;
 513
 514         for (int t=0; t <= ConnectivityManager.MAX_RADIO_TYPE; t++) {
 515             if (t != mNetworkPreference && mNetTrackers[t] != null &&
 516                     mNetTrackers[t].getNetworkInfo().isConnected()) {
 517                 if (DBG) {
 518                     log("tearing down " + mNetTrackers[t].getNetworkInfo() +
 519                             " in enforcePreference");
 520                 }
 521                 teardown(mNetTrackers[t]);
 522             }
 523         }
 524     }
 525
 526     private boolean teardown(NetworkStateTracker netTracker) {
 527         if (netTracker.teardown()) {
 528             netTracker.setTeardownRequested(true);
 529             return true;
 530         } else {
 531             return false;
 532         }
 533     }
 534
 535     /**
 536      * Return NetworkInfo for the active (i.e., connected) network interface.
 537      * It is assumed that at most one network is active at a time. If more
 538      * than one is active, it is indeterminate which will be returned.
 539      * @return the info for the active network, or {@code null} if none is
 540      * active
 541      */
 542     public NetworkInfo getActiveNetworkInfo() {
 543         return getNetworkInfo(mActiveDefaultNetwork);
 544     }
 545
 546     public NetworkInfo getNetworkInfo(int networkType) {
 547         enforceAccessPermission();
 548         if (ConnectivityManager.isNetworkTypeValid(networkType)) {
 549             NetworkStateTracker t = mNetTrackers[networkType];
 550             if (t != null)
 551                 return t.getNetworkInfo();
 552         }
 553         return null;
 554     }
 555
 556     public NetworkInfo[] getAllNetworkInfo() {
 557         enforceAccessPermission();
 558         NetworkInfo[] result = new NetworkInfo[mNetworksDefined];
 559         int i = 0;
 560         for (NetworkStateTracker t : mNetTrackers) {
 561             if(t != null) result[i++] = t.getNetworkInfo();
 562         }
 563         return result;
 564     }
 565
 566     /**
 567      * Return LinkProperties for the active (i.e., connected) default
 568      * network interface.  It is assumed that at most one default network
 569      * is active at a time. If more than one is active, it is indeterminate
 570      * which will be returned.
 571      * @return the ip properties for the active network, or {@code null} if
 572      * none is active
 573      */
 574     public LinkProperties getActiveLinkProperties() {
 575         return getLinkProperties(mActiveDefaultNetwork);
 576     }
 577
 578     public LinkProperties getLinkProperties(int networkType) {
 579         enforceAccessPermission();
 580         if (ConnectivityManager.isNetworkTypeValid(networkType)) {
 581             NetworkStateTracker t = mNetTrackers[networkType];
 582             if (t != null) return t.getLinkProperties();
 583         }
 584         return null;
 585     }
 586
 587     public boolean setRadios(boolean turnOn) {
 588         boolean result = true;
 589         enforceChangePermission();
 590         for (NetworkStateTracker t : mNetTrackers) {
 591             if (t != null) result = t.setRadio(turnOn) && result;
 592         }
 593         return result;
 594     }
 595
 596     public boolean setRadio(int netType, boolean turnOn) {
 597         enforceChangePermission();
 598         if (!ConnectivityManager.isNetworkTypeValid(netType)) {
 599             return false;
 600         }
 601         NetworkStateTracker tracker = mNetTrackers[netType];
 602         return tracker != null && tracker.setRadio(turnOn);
 603     }
 604
 605     /**
 606      * Used to notice when the calling process dies so we can self-expire
 607      *
 608      * Also used to know if the process has cleaned up after itself when
 609      * our auto-expire timer goes off.  The timer has a link to an object.
 610      *
 611      */
 612     private class FeatureUser implements IBinder.DeathRecipient {
 613         int mNetworkType;
 614         String mFeature;
 615         IBinder mBinder;
 616         int mPid;
 617         int mUid;
 618         long mCreateTime;
 619
 620         FeatureUser(int type, String feature, IBinder binder) {
 621             super();
 622             mNetworkType = type;
 623             mFeature = feature;
 624             mBinder = binder;
 625             mPid = getCallingPid();
 626             mUid = getCallingUid();
 627             mCreateTime = System.currentTimeMillis();
 628
 629             try {
 630                 mBinder.linkToDeath(this, 0);
 631             } catch (RemoteException e) {
 632                 binderDied();
 633             }
 634         }
 635
 636         void unlinkDeathRecipient() {
 637             mBinder.unlinkToDeath(this, 0);
 638         }
 639
 640         public void binderDied() {
 641             log("ConnectivityService FeatureUser binderDied(" +
 642                     mNetworkType + ", " + mFeature + ", " + mBinder + "), created " +
 643                     (System.currentTimeMillis() - mCreateTime) + " mSec ago");
 644             stopUsingNetworkFeature(this, false);
 645         }
 646
 647         public void expire() {
 648             log("ConnectivityService FeatureUser expire(" +
 649                     mNetworkType + ", " + mFeature + ", " + mBinder +"), created " +
 650                     (System.currentTimeMillis() - mCreateTime) + " mSec ago");
 651             stopUsingNetworkFeature(this, false);
 652         }
 653
 654         public String toString() {
 655             return "FeatureUser("+mNetworkType+","+mFeature+","+mPid+","+mUid+"), created " +
 656                     (System.currentTimeMillis() - mCreateTime) + " mSec ago";
 657         }
 658     }
 659
 660     // javadoc from interface
 661     public int startUsingNetworkFeature(int networkType, String feature,
 662             IBinder binder) {
 663         if (DBG) {
 664             log("startUsingNetworkFeature for net " + networkType + ": " + feature);
 665         }
 666         enforceChangePermission();
 667         if (!ConnectivityManager.isNetworkTypeValid(networkType) ||
 668                 mNetConfigs[networkType] == null) {
 669             return Phone.APN_REQUEST_FAILED;
 670         }
 671
 672         FeatureUser f = new FeatureUser(networkType, feature, binder);
 673
 674         // TODO - move this into the MobileDataStateTracker
 675         int usedNetworkType = networkType;
 676         if(networkType == ConnectivityManager.TYPE_MOBILE) {
 677             usedNetworkType = convertFeatureToNetworkType(feature);
 678             if (usedNetworkType < 0) {
 679                 Slog.e(TAG, "Can't match any netTracker!");
 680                 usedNetworkType = networkType;
 681             }
 682         }
 683         NetworkStateTracker network = mNetTrackers[usedNetworkType];
 684         if (network != null) {
 685             Integer currentPid = new Integer(getCallingPid());
 686             if (usedNetworkType != networkType) {
 687                 NetworkStateTracker radio = mNetTrackers[networkType];
 688                 NetworkInfo ni = network.getNetworkInfo();
 689
 690                 if (ni.isAvailable() == false) {
 691                     if (DBG) log("special network not available");
 692                     if (!TextUtils.equals(feature,Phone.FEATURE_ENABLE_DUN_ALWAYS)) {
 693                         return Phone.APN_TYPE_NOT_AVAILABLE;
 694                     } else {
 695                         // else make the attempt anyway - probably giving REQUEST_STARTED below
 696                     }
 697                 }
 698
 699                 synchronized(this) {
 700                     mFeatureUsers.add(f);
 701                     if (!mNetRequestersPids[usedNetworkType].contains(currentPid)) {
 702                         // this gets used for per-pid dns when connected
 703                         mNetRequestersPids[usedNetworkType].add(currentPid);
 704                     }
 705                 }
 706
 707                 int restoreTimer = getRestoreDefaultNetworkDelay(usedNetworkType);
 708
 709                 if (restoreTimer >= 0) {
 710                     mHandler.sendMessageDelayed(
 711                             mHandler.obtainMessage(EVENT_RESTORE_DEFAULT_NETWORK, f), restoreTimer);
 712                 }
 713
 714                 if ((ni.isConnectedOrConnecting() == true) &&
 715                         !network.isTeardownRequested()) {
 716                     if (ni.isConnected() == true) {
 717                         // add the pid-specific dns
 718                         handleDnsConfigurationChange(networkType);
 719                         if (DBG) log("special network already active");
 720                         return Phone.APN_ALREADY_ACTIVE;
 721                     }
 722                     if (DBG) log("special network already connecting");
 723                     return Phone.APN_REQUEST_STARTED;
 724                 }
 725
 726                 // check if the radio in play can make another contact
 727                 // assume if cannot for now
 728
 729                 if (DBG) log("reconnecting to special network");
 730                 network.reconnect();
 731                 return Phone.APN_REQUEST_STARTED;
 732             } else {
 733                 // need to remember this unsupported request so we respond appropriately on stop
 734                 synchronized(this) {
 735                     mFeatureUsers.add(f);
 736                     if (!mNetRequestersPids[usedNetworkType].contains(currentPid)) {
 737                         // this gets used for per-pid dns when connected
 738                         mNetRequestersPids[usedNetworkType].add(currentPid);
 739                     }
 740                 }
 741                 return -1;
 742             }
 743         }
 744         return Phone.APN_TYPE_NOT_AVAILABLE;
 745     }
 746
 747     // javadoc from interface
 748     public int stopUsingNetworkFeature(int networkType, String feature) {
 749         enforceChangePermission();
 750
 751         int pid = getCallingPid();
 752         int uid = getCallingUid();
 753
 754         FeatureUser u = null;
 755         boolean found = false;
 756
 757         synchronized(this) {
 758             for (int i = 0; i < mFeatureUsers.size() ; i++) {
 759                 u = (FeatureUser)mFeatureUsers.get(i);
 760                 if (uid == u.mUid && pid == u.mPid &&
 761                         networkType == u.mNetworkType &&
 762                         TextUtils.equals(feature, u.mFeature)) {
 763                     found = true;
 764                     break;
 765                 }
 766             }
 767         }
 768         if (found && u != null) {
 769             // stop regardless of how many other time this proc had called start
 770             return stopUsingNetworkFeature(u, true);
 771         } else {
 772             // none found!
 773             if (DBG) log("ignoring stopUsingNetworkFeature - not a live request");
 774             return 1;
 775         }
 776     }
 777
 778     private int stopUsingNetworkFeature(FeatureUser u, boolean ignoreDups) {
 779         int networkType = u.mNetworkType;
 780         String feature = u.mFeature;
 781         int pid = u.mPid;
 782         int uid = u.mUid;
 783
 784         NetworkStateTracker tracker = null;
 785         boolean callTeardown = false;  // used to carry our decision outside of sync block
 786
 787         if (DBG) {
 788             log("stopUsingNetworkFeature for net " + networkType +
 789                     ": " + feature);
 790         }
 791
 792         if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
 793             return -1;
 794         }
 795
 796         // need to link the mFeatureUsers list with the mNetRequestersPids state in this
 797         // sync block
 798         synchronized(this) {
 799             // check if this process still has an outstanding start request
 800             if (!mFeatureUsers.contains(u)) {
 801                 if (DBG) log("ignoring - this process has no outstanding requests");
 802                 return 1;
 803             }
 804             u.unlinkDeathRecipient();
 805             mFeatureUsers.remove(mFeatureUsers.indexOf(u));
 806             // If we care about duplicate requests, check for that here.
 807             //
 808             // This is done to support the extension of a request - the app
 809             // can request we start the network feature again and renew the
 810             // auto-shutoff delay.  Normal "stop" calls from the app though
 811             // do not pay attention to duplicate requests - in effect the
 812             // API does not refcount and a single stop will counter multiple starts.
 813             if (ignoreDups == false) {
 814                 for (int i = 0; i < mFeatureUsers.size() ; i++) {
 815                     FeatureUser x = (FeatureUser)mFeatureUsers.get(i);
 816                     if (x.mUid == u.mUid && x.mPid == u.mPid &&
 817                             x.mNetworkType == u.mNetworkType &&
 818                             TextUtils.equals(x.mFeature, u.mFeature)) {
 819                         if (DBG) log("ignoring stopUsingNetworkFeature as dup is found");
 820                         return 1;
 821                     }
 822                 }
 823             }
 824
 825             // TODO - move to MobileDataStateTracker
 826             int usedNetworkType = networkType;
 827             if (networkType == ConnectivityManager.TYPE_MOBILE) {
 828                 usedNetworkType = convertFeatureToNetworkType(feature);
 829                 if (usedNetworkType < 0) {
 830                     usedNetworkType = networkType;
 831                 }
 832             }
 833             tracker =  mNetTrackers[usedNetworkType];
 834             if (tracker == null) {
 835                 if (DBG) log("ignoring - no known tracker for net type " + usedNetworkType);
 836                 return -1;
 837             }
 838             if (usedNetworkType != networkType) {
 839                 Integer currentPid = new Integer(pid);
 840                 mNetRequestersPids[usedNetworkType].remove(currentPid);
 841                 reassessPidDns(pid, true);
 842                 if (mNetRequestersPids[usedNetworkType].size() != 0) {
 843                     if (DBG) log("not tearing down special network - " +
 844                            "others still using it");
 845                     return 1;
 846                 }
 847                 callTeardown = true;
 848             } else {
 849                 if (DBG) log("not a known feature - dropping");
 850             }
 851         }
 852         if (DBG) log("Doing network teardown");
 853         if (callTeardown) {
 854             tracker.teardown();
 855             return 1;
 856         } else {
 857             return -1;
 858         }
 859     }
 860
 861     /**
 862      * @deprecated use requestRouteToHostAddress instead
 863      *
 864      * Ensure that a network route exists to deliver traffic to the specified
 865      * host via the specified network interface.
 866      * @param networkType the type of the network over which traffic to the
 867      * specified host is to be routed
 868      * @param hostAddress the IP address of the host to which the route is
 869      * desired
 870      * @return {@code true} on success, {@code false} on failure
 871      */
 872     public boolean requestRouteToHost(int networkType, int hostAddress) {
 873         InetAddress inetAddress = NetworkUtils.intToInetAddress(hostAddress);
 874
 875         if (inetAddress == null) {
 876             return false;
 877         }
 878
 879         return requestRouteToHostAddress(networkType, inetAddress.getAddress());
 880     }
 881
 882     /**
 883      * Ensure that a network route exists to deliver traffic to the specified
 884      * host via the specified network interface.
 885      * @param networkType the type of the network over which traffic to the
 886      * specified host is to be routed
 887      * @param hostAddress the IP address of the host to which the route is
 888      * desired
 889      * @return {@code true} on success, {@code false} on failure
 890      */
 891     public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) {
 892         enforceChangePermission();
 893         if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
 894             return false;
 895         }
 896         NetworkStateTracker tracker = mNetTrackers[networkType];
 897
 898         if (tracker == null || !tracker.getNetworkInfo().isConnected() ||
 899                 tracker.isTeardownRequested()) {
 900             if (DBG) {
 901                 log("requestRouteToHostAddress on down network " +
 902                            "(" + networkType + ") - dropped");
 903             }
 904             return false;
 905         }
 906         try {
 907             InetAddress addr = InetAddress.getByAddress(hostAddress);
 908             return addHostRoute(tracker, addr, 0);
 909         } catch (UnknownHostException e) {}
 910         return false;
 911     }
 912
 913     /**
 914      * Ensure that a network route exists to deliver traffic to the specified
 915      * host via the mobile data network.
 916      * @param hostAddress the IP address of the host to which the route is desired,
 917      * in network byte order.
 918      * TODO - deprecate
 919      * @return {@code true} on success, {@code false} on failure
 920      */
 921     private boolean addHostRoute(NetworkStateTracker nt, InetAddress hostAddress, int cycleCount) {
 922         LinkProperties lp = nt.getLinkProperties();
 923         if ((lp == null) || (hostAddress == null)) return false;
 924
 925         String interfaceName = lp.getInterfaceName();
 926         if (DBG) {
 927             log("Requested host route to " + hostAddress + "(" + interfaceName + "), cycleCount=" +
 928                     cycleCount);
 929         }
 930         if (interfaceName == null) {
 931             if (DBG) loge("addHostRoute failed due to null interface name");
 932             return false;
 933         }
 934
 935         RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getRoutes(), hostAddress);
 936         InetAddress gatewayAddress = null;
 937         if (bestRoute != null) {
 938             gatewayAddress = bestRoute.getGateway();
 939             // if the best route is ourself, don't relf-reference, just add the host route
 940             if (hostAddress.equals(gatewayAddress)) gatewayAddress = null;
 941         }
 942         if (gatewayAddress != null) {
 943             if (cycleCount > MAX_HOSTROUTE_CYCLE_COUNT) {
 944                 loge("Error adding hostroute - too much recursion");
 945                 return false;
 946             }
 947             if (!addHostRoute(nt, gatewayAddress, cycleCount+1)) return false;
 948         }
 949
 950         RouteInfo route = RouteInfo.makeHostRoute(hostAddress, gatewayAddress);
 951
 952         try {
 953             mNetd.addRoute(interfaceName, route);
 954             return true;
 955         } catch (Exception ex) {
 956             return false;
 957         }
 958     }
 959
 960     // TODO support the removal of single host routes.  Keep a ref count of them so we
 961     // aren't over-zealous
 962     private boolean removeHostRoute(NetworkStateTracker nt, InetAddress hostAddress) {
 963         return false;
 964     }
 965
 966     /**
 967      * @see ConnectivityManager#getBackgroundDataSetting()
 968      */
 969     public boolean getBackgroundDataSetting() {
 970         return mBackgroundDataEnabled.get();
 971     }
 972
 973     /**
 974      * @see ConnectivityManager#setBackgroundDataSetting(boolean)
 975      */
 976     public void setBackgroundDataSetting(boolean allowBackgroundDataUsage) {
 977         mContext.enforceCallingOrSelfPermission(
 978                 android.Manifest.permission.CHANGE_BACKGROUND_DATA_SETTING,
 979                 "ConnectivityService");
 980
 981         mBackgroundDataEnabled.set(allowBackgroundDataUsage);
 982
 983         mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_BACKGROUND_DATA,
 984                 (allowBackgroundDataUsage ? ENABLED : DISABLED), 0));
 985     }
 986
 987     private void handleSetBackgroundData(boolean enabled) {
 988         Settings.Secure.putInt(mContext.getContentResolver(),
 989                 Settings.Secure.BACKGROUND_DATA, enabled ? 1 : 0);
 990         Intent broadcast = new Intent(
 991                 ConnectivityManager.ACTION_BACKGROUND_DATA_SETTING_CHANGED);
 992         mContext.sendBroadcast(broadcast);
 993     }
 994
 995     /**
 996      * @see ConnectivityManager#getMobileDataEnabled()
 997      */
 998     public boolean getMobileDataEnabled() {
 999         // TODO: This detail should probably be in DataConnectionTracker's
1000         //       which is where we store the value and maybe make this
1001         //       asynchronous.
1002         enforceAccessPermission();
1003         boolean retVal = Settings.Secure.getInt(mContext.getContentResolver(),
1004                 Settings.Secure.MOBILE_DATA, 1) == 1;
1005         if (DBG) log("getMobileDataEnabled returning " + retVal);
1006         return retVal;
1007     }
1008
1009     public void setDataDependency(int networkType, boolean met) {
1010         enforceChangePermission();
1011         if (DBG) {
1012             log("setDataDependency(" + networkType + ", " + met + ")");
1013         }
1014         mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_DEPENDENCY_MET,
1015                 (met ? ENABLED : DISABLED), networkType));
1016     }
1017
1018     private void handleSetDependencyMet(int networkType, boolean met) {
1019         if (mNetTrackers[networkType] != null) {
1020             if (DBG) {
1021                 log("handleSetDependencyMet(" + networkType + ", " + met + ")");
1022             }
1023             mNetTrackers[networkType].setDependencyMet(met);
1024         }
1025     }
1026
1027     /**
1028      * @see ConnectivityManager#setMobileDataEnabled(boolean)
1029      */
1030     public void setMobileDataEnabled(boolean enabled) {
1031         enforceChangePermission();
1032         if (DBG) log("setMobileDataEnabled(" + enabled + ")");
1033
1034         mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_MOBILE_DATA,
1035                 (enabled ? ENABLED : DISABLED), 0));
1036     }
1037
1038     private void handleSetMobileData(boolean enabled) {
1039         if (mNetTrackers[ConnectivityManager.TYPE_MOBILE] != null) {
1040             if (DBG) {
1041                 Slog.d(TAG, mNetTrackers[ConnectivityManager.TYPE_MOBILE].toString() + enabled);
1042             }
1043             mNetTrackers[ConnectivityManager.TYPE_MOBILE].setDataEnable(enabled);
1044         }
1045     }
1046
1047     private void enforceAccessPermission() {
1048         mContext.enforceCallingOrSelfPermission(
1049                 android.Manifest.permission.ACCESS_NETWORK_STATE,
1050                 "ConnectivityService");
1051     }
1052
1053     private void enforceChangePermission() {
1054         mContext.enforceCallingOrSelfPermission(
1055                 android.Manifest.permission.CHANGE_NETWORK_STATE,
1056                 "ConnectivityService");
1057     }
1058
1059     // TODO Make this a special check when it goes public
1060     private void enforceTetherChangePermission() {
1061         mContext.enforceCallingOrSelfPermission(
1062                 android.Manifest.permission.CHANGE_NETWORK_STATE,
1063                 "ConnectivityService");
1064     }
1065
1066     private void enforceTetherAccessPermission() {
1067         mContext.enforceCallingOrSelfPermission(
1068                 android.Manifest.permission.ACCESS_NETWORK_STATE,
1069                 "ConnectivityService");
1070     }
1071
1072     private void enforceConnectivityInternalPermission() {
1073         mContext.enforceCallingOrSelfPermission(
1074                 android.Manifest.permission.CONNECTIVITY_INTERNAL,
1075                 "ConnectivityService");
1076     }
1077
1078     /**
1079      * Handle a {@code DISCONNECTED} event. If this pertains to the non-active
1080      * network, we ignore it. If it is for the active network, we send out a
1081      * broadcast. But first, we check whether it might be possible to connect
1082      * to a different network.
1083      * @param info the {@code NetworkInfo} for the network
1084      */
1085     private void handleDisconnect(NetworkInfo info) {
1086
1087         int prevNetType = info.getType();
1088
1089         mNetTrackers[prevNetType].setTeardownRequested(false);
1090         /*
1091          * If the disconnected network is not the active one, then don't report
1092          * this as a loss of connectivity. What probably happened is that we're
1093          * getting the disconnect for a network that we explicitly disabled
1094          * in accordance with network preference policies.
1095          */
1096         if (!mNetConfigs[prevNetType].isDefault()) {
1097             List pids = mNetRequestersPids[prevNetType];
1098             for (int i = 0; i<pids.size(); i++) {
1099                 Integer pid = (Integer)pids.get(i);
1100                 // will remove them because the net's no longer connected
1101                 // need to do this now as only now do we know the pids and
1102                 // can properly null things that are no longer referenced.
1103                 reassessPidDns(pid.intValue(), false);
1104             }
1105         }
1106
1107         Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
1108         intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
1109         if (info.isFailover()) {
1110             intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
1111             info.setFailover(false);
1112         }
1113         if (info.getReason() != null) {
1114             intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
1115         }
1116         if (info.getExtraInfo() != null) {
1117             intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,
1118                     info.getExtraInfo());
1119         }
1120
1121         if (mNetConfigs[prevNetType].isDefault()) {
1122             tryFailover(prevNetType);
1123             if (mActiveDefaultNetwork != -1) {
1124                 NetworkInfo switchTo = mNetTrackers[mActiveDefaultNetwork].getNetworkInfo();
1125                 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, switchTo);
1126             } else {
1127                 mDefaultInetConditionPublished = 0; // we're not connected anymore
1128                 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
1129             }
1130         }
1131         intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
1132         // do this before we broadcast the change
1133         handleConnectivityChange(prevNetType);
1134
1135         sendStickyBroadcast(intent);
1136         /*
1137          * If the failover network is already connected, then immediately send
1138          * out a followup broadcast indicating successful failover
1139          */
1140         if (mActiveDefaultNetwork != -1) {
1141             sendConnectedBroadcast(mNetTrackers[mActiveDefaultNetwork].getNetworkInfo());
1142         }
1143     }
1144
1145     private void tryFailover(int prevNetType) {
1146         /*
1147          * If this is a default network, check if other defaults are available.
1148          * Try to reconnect on all available and let them hash it out when
1149          * more than one connects.
1150          */
1151         if (mNetConfigs[prevNetType].isDefault()) {
1152             if (mActiveDefaultNetwork == prevNetType) {
1153                 mActiveDefaultNetwork = -1;
1154             }
1155
1156             // don't signal a reconnect for anything lower or equal priority than our
1157             // current connected default
1158             // TODO - don't filter by priority now - nice optimization but risky
1159 //            int currentPriority = -1;
1160 //            if (mActiveDefaultNetwork != -1) {
1161 //                currentPriority = mNetConfigs[mActiveDefaultNetwork].mPriority;
1162 //            }
1163             for (int checkType=0; checkType <= ConnectivityManager.MAX_NETWORK_TYPE; checkType++) {
1164                 if (checkType == prevNetType) continue;
1165                 if (mNetConfigs[checkType] == null) continue;
1166                 if (!mNetConfigs[checkType].isDefault()) continue;
1167
1168 // Enabling the isAvailable() optimization caused mobile to not get
1169 // selected if it was in the middle of error handling. Specifically
1170 // a moble connection that took 30 seconds to complete the DEACTIVATE_DATA_CALL
1171 // would not be available and we wouldn't get connected to anything.
1172 // So removing the isAvailable() optimization below for now. TODO: This
1173 // optimization should work and we need to investigate why it doesn't work.
1174 // This could be related to how DEACTIVATE_DATA_CALL is reporting its
1175 // complete before it is really complete.
1176 //                if (!mNetTrackers[checkType].isAvailable()) continue;
1177
1178 //                if (currentPriority >= mNetConfigs[checkType].mPriority) continue;
1179
1180                 NetworkStateTracker checkTracker = mNetTrackers[checkType];
1181                 NetworkInfo checkInfo = checkTracker.getNetworkInfo();
1182                 if (!checkInfo.isConnectedOrConnecting() || checkTracker.isTeardownRequested()) {
1183                     checkInfo.setFailover(true);
1184                     checkTracker.reconnect();
1185                 }
1186                 if (DBG) log("Attempting to switch to " + checkInfo.getTypeName());
1187             }
1188         }
1189     }
1190
1191     private void sendConnectedBroadcast(NetworkInfo info) {
1192         sendGeneralBroadcast(info, ConnectivityManager.CONNECTIVITY_ACTION);
1193     }
1194
1195     private void sendInetConditionBroadcast(NetworkInfo info) {
1196         sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION);
1197     }
1198
1199     private void sendGeneralBroadcast(NetworkInfo info, String bcastType) {
1200         Intent intent = new Intent(bcastType);
1201         intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
1202         if (info.isFailover()) {
1203             intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
1204             info.setFailover(false);
1205         }
1206         if (info.getReason() != null) {
1207             intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
1208         }
1209         if (info.getExtraInfo() != null) {
1210             intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,
1211                     info.getExtraInfo());
1212         }
1213         intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
1214         sendStickyBroadcast(intent);
1215     }
1216
1217     /**
1218      * Called when an attempt to fail over to another network has failed.
1219      * @param info the {@link NetworkInfo} for the failed network
1220      */
1221     private void handleConnectionFailure(NetworkInfo info) {
1222         mNetTrackers[info.getType()].setTeardownRequested(false);
1223
1224         String reason = info.getReason();
1225         String extraInfo = info.getExtraInfo();
1226
1227         String reasonText;
1228         if (reason == null) {
1229             reasonText = ".";
1230         } else {
1231             reasonText = " (" + reason + ").";
1232         }
1233         loge("Attempt to connect to " + info.getTypeName() + " failed" + reasonText);
1234
1235         Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
1236         intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
1237         if (getActiveNetworkInfo() == null) {
1238             intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
1239         }
1240         if (reason != null) {
1241             intent.putExtra(ConnectivityManager.EXTRA_REASON, reason);
1242         }
1243         if (extraInfo != null) {
1244             intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, extraInfo);
1245         }
1246         if (info.isFailover()) {
1247             intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
1248             info.setFailover(false);
1249         }
1250
1251         if (mNetConfigs[info.getType()].isDefault()) {
1252             tryFailover(info.getType());
1253             if (mActiveDefaultNetwork != -1) {
1254                 NetworkInfo switchTo = mNetTrackers[mActiveDefaultNetwork].getNetworkInfo();
1255                 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, switchTo);
1256             } else {
1257                 mDefaultInetConditionPublished = 0;
1258                 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
1259             }
1260         }
1261
1262         intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
1263         sendStickyBroadcast(intent);
1264         /*
1265          * If the failover network is already connected, then immediately send
1266          * out a followup broadcast indicating successful failover
1267          */
1268         if (mActiveDefaultNetwork != -1) {
1269             sendConnectedBroadcast(mNetTrackers[mActiveDefaultNetwork].getNetworkInfo());
1270         }
1271     }
1272
1273     private void sendStickyBroadcast(Intent intent) {
1274         synchronized(this) {
1275             if (!mSystemReady) {
1276                 mInitialBroadcast = new Intent(intent);
1277             }
1278             intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
1279             mContext.sendStickyBroadcast(intent);
1280         }
1281     }
1282
1283     void systemReady() {
1284         IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE);
1285         mNetd = INetworkManagementService.Stub.asInterface(b);
1286
1287         synchronized(this) {
1288             mSystemReady = true;
1289             if (mInitialBroadcast != null) {
1290                 mContext.sendStickyBroadcast(mInitialBroadcast);
1291                 mInitialBroadcast = null;
1292             }
1293         }
1294         // load the global proxy at startup
1295         mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY));
1296     }
1297
1298     private void handleConnect(NetworkInfo info) {
1299         int type = info.getType();
1300
1301         // snapshot isFailover, because sendConnectedBroadcast() resets it
1302         boolean isFailover = info.isFailover();
1303         NetworkStateTracker thisNet = mNetTrackers[type];
1304
1305         // if this is a default net and other default is running
1306         // kill the one not preferred
1307         if (mNetConfigs[type].isDefault()) {
1308             if (mActiveDefaultNetwork != -1 && mActiveDefaultNetwork != type) {
1309                 if ((type != mNetworkPreference &&
1310                         mNetConfigs[mActiveDefaultNetwork].priority >
1311                         mNetConfigs[type].priority) ||
1312                         mNetworkPreference == mActiveDefaultNetwork) {
1313                         // don't accept this one
1314                         if (DBG) {
1315                             log("Not broadcasting CONNECT_ACTION " +
1316                                 "to torn down network " + info.getTypeName());
1317                         }
1318                         teardown(thisNet);
1319                         return;
1320                 } else {
1321                     // tear down the other
1322                     NetworkStateTracker otherNet =
1323                             mNetTrackers[mActiveDefaultNetwork];
1324                     if (DBG) {
1325                         log("Policy requires " + otherNet.getNetworkInfo().getTypeName() +
1326                             " teardown");
1327                     }
1328                     if (!teardown(otherNet)) {
1329                         loge("Network declined teardown request");
1330                         return;
1331                     }
1332                 }
1333             }
1334             synchronized (ConnectivityService.this) {
1335                 // have a new default network, release the transition wakelock in a second
1336                 // if it's held.  The second pause is to allow apps to reconnect over the
1337                 // new network
1338                 if (mNetTransitionWakeLock.isHeld()) {
1339                     mHandler.sendMessageDelayed(mHandler.obtainMessage(
1340                             EVENT_CLEAR_NET_TRANSITION_WAKELOCK,
1341                             mNetTransitionWakeLockSerialNumber, 0),
1342                             1000);
1343                 }
1344             }
1345             mActiveDefaultNetwork = type;
1346             // this will cause us to come up initially as unconnected and switching
1347             // to connected after our normal pause unless somebody reports us as reall
1348             // disconnected
1349             mDefaultInetConditionPublished = 0;
1350             mDefaultConnectionSequence++;
1351             mInetConditionChangeInFlight = false;
1352             // Don't do this - if we never sign in stay, grey
1353             //reportNetworkCondition(mActiveDefaultNetwork, 100);
1354         }
1355         thisNet.setTeardownRequested(false);
1356         updateNetworkSettings(thisNet);
1357         handleConnectivityChange(type);
1358         sendConnectedBroadcast(info);
1359     }
1360
1361     /**
1362      * After a change in the connectivity state of a network. We're mainly
1363      * concerned with making sure that the list of DNS servers is set up
1364      * according to which networks are connected, and ensuring that the
1365      * right routing table entries exist.
1366      */
1367     private void handleConnectivityChange(int netType) {
1368         /*
1369          * If a non-default network is enabled, add the host routes that
1370          * will allow it's DNS servers to be accessed.
1371          */
1372         handleDnsConfigurationChange(netType);
1373
1374         if (mNetTrackers[netType].getNetworkInfo().isConnected()) {
1375             if (mNetConfigs[netType].isDefault()) {
1376                 handleApplyDefaultProxy(netType);
1377                 addDefaultRoute(mNetTrackers[netType]);
1378             } else {
1379                 addPrivateDnsRoutes(mNetTrackers[netType]);
1380             }
1381
1382             /** Notify TetheringService if interface name has been changed. */
1383             if (TextUtils.equals(mNetTrackers[netType].getNetworkInfo().getReason(),
1384                                  Phone.REASON_LINK_PROPERTIES_CHANGED)) {
1385                 handleTetherIfaceChange(netType);
1386             }
1387         } else {
1388             if (mNetConfigs[netType].isDefault()) {
1389                 removeDefaultRoute(mNetTrackers[netType]);
1390             } else {
1391                 removePrivateDnsRoutes(mNetTrackers[netType]);
1392             }
1393         }
1394     }
1395
1396     private void addPrivateDnsRoutes(NetworkStateTracker nt) {
1397         boolean privateDnsRouteSet = nt.isPrivateDnsRouteSet();
1398         LinkProperties p = nt.getLinkProperties();
1399         if (p == null) return;
1400         String interfaceName = p.getInterfaceName();
1401
1402         if (DBG) {
1403             log("addPrivateDnsRoutes for " + nt +
1404                     "(" + interfaceName + ") - mPrivateDnsRouteSet = " + privateDnsRouteSet);
1405         }
1406         if (interfaceName != null && !privateDnsRouteSet) {
1407             Collection<InetAddress> dnsList = p.getDnses();
1408             for (InetAddress dns : dnsList) {
1409                 addHostRoute(nt, dns, 0);
1410             }
1411             nt.privateDnsRouteSet(true);
1412         }
1413     }
1414
1415     private void removePrivateDnsRoutes(NetworkStateTracker nt) {
1416         LinkProperties p = nt.getLinkProperties();
1417         if (p == null) return;
1418         String interfaceName = p.getInterfaceName();
1419         boolean privateDnsRouteSet = nt.isPrivateDnsRouteSet();
1420         if (interfaceName != null && privateDnsRouteSet) {
1421             if (DBG) {
1422                 log("removePrivateDnsRoutes for " + nt.getNetworkInfo().getTypeName() +
1423                         " (" + interfaceName + ")");
1424             }
1425
1426             Collection<InetAddress> dnsList = p.getDnses();
1427             for (InetAddress dns : dnsList) {
1428                 if (DBG) log("  removing " + dns);
1429                 RouteInfo route = RouteInfo.makeHostRoute(dns);
1430                 try {
1431                     mNetd.removeRoute(interfaceName, route);
1432                 } catch (Exception ex) {
1433                     loge("error (" + ex + ") removing dns route " + route);
1434                 }
1435             }
1436             nt.privateDnsRouteSet(false);
1437         }
1438     }
1439
1440
1441     private void addDefaultRoute(NetworkStateTracker nt) {
1442         LinkProperties p = nt.getLinkProperties();
1443         if (p == null) return;
1444         String interfaceName = p.getInterfaceName();
1445         if (TextUtils.isEmpty(interfaceName)) return;
1446
1447         for (RouteInfo route : p.getRoutes()) {
1448             //TODO - handle non-default routes
1449             if (route.isDefaultRoute()) {
1450                 if (DBG) log("adding default route " + route);
1451                 InetAddress gateway = route.getGateway();
1452                 if (addHostRoute(nt, gateway, 0)) {
1453                     try {
1454                         mNetd.addRoute(interfaceName, route);
1455                     } catch (Exception e) {
1456                         loge("error adding default route " + route);
1457                         continue;
1458                     }
1459                     if (DBG) {
1460                         NetworkInfo networkInfo = nt.getNetworkInfo();
1461                         log("addDefaultRoute for " + networkInfo.getTypeName() +
1462                                 " (" + interfaceName + "), GatewayAddr=" +
1463                                 gateway.getHostAddress());
1464                     }
1465                 } else {
1466                     loge("error adding host route for default route " + route);
1467                 }
1468             }
1469         }
1470     }
1471
1472
1473     public void removeDefaultRoute(NetworkStateTracker nt) {
1474         LinkProperties p = nt.getLinkProperties();
1475         if (p == null) return;
1476         String interfaceName = p.getInterfaceName();
1477
1478         if (interfaceName == null) return;
1479
1480         for (RouteInfo route : p.getRoutes()) {
1481             //TODO - handle non-default routes
1482             if (route.isDefaultRoute()) {
1483                 try {
1484                     mNetd.removeRoute(interfaceName, route);
1485                 } catch (Exception ex) {
1486                     loge("error (" + ex + ") removing default route " + route);
1487                     continue;
1488                 }
1489                 if (DBG) {
1490                     NetworkInfo networkInfo = nt.getNetworkInfo();
1491                     log("removeDefaultRoute for " + networkInfo.getTypeName() + " (" +
1492                             interfaceName + ")");
1493                 }
1494             }
1495         }
1496     }
1497
1498    /**
1499      * Reads the network specific TCP buffer sizes from SystemProperties
1500      * net.tcp.buffersize.[default|wifi|umts|edge|gprs] and set them for system
1501      * wide use
1502      */
1503    public void updateNetworkSettings(NetworkStateTracker nt) {
1504         String key = nt.getTcpBufferSizesPropName();
1505         String bufferSizes = SystemProperties.get(key);
1506
1507         if (bufferSizes.length() == 0) {
1508             loge(key + " not found in system properties. Using defaults");
1509
1510             // Setting to default values so we won't be stuck to previous values
1511             key = "net.tcp.buffersize.default";
1512             bufferSizes = SystemProperties.get(key);
1513         }
1514
1515         // Set values in kernel
1516         if (bufferSizes.length() != 0) {
1517             if (DBG) {
1518                 log("Setting TCP values: [" + bufferSizes
1519                         + "] which comes from [" + key + "]");
1520             }
1521             setBufferSize(bufferSizes);
1522         }
1523     }
1524
1525    /**
1526      * Writes TCP buffer sizes to /sys/kernel/ipv4/tcp_[r/w]mem_[min/def/max]
1527      * which maps to /proc/sys/net/ipv4/tcp_rmem and tcpwmem
1528      *
1529      * @param bufferSizes in the format of "readMin, readInitial, readMax,
1530      *        writeMin, writeInitial, writeMax"
1531      */
1532     private void setBufferSize(String bufferSizes) {
1533         try {
1534             String[] values = bufferSizes.split(",");
1535
1536             if (values.length == 6) {
1537               final String prefix = "/sys/kernel/ipv4/tcp_";
1538                 stringToFile(prefix + "rmem_min", values[0]);
1539                 stringToFile(prefix + "rmem_def", values[1]);
1540                 stringToFile(prefix + "rmem_max", values[2]);
1541                 stringToFile(prefix + "wmem_min", values[3]);
1542                 stringToFile(prefix + "wmem_def", values[4]);
1543                 stringToFile(prefix + "wmem_max", values[5]);
1544             } else {
1545                 loge("Invalid buffersize string: " + bufferSizes);
1546             }
1547         } catch (IOException e) {
1548             loge("Can't set tcp buffer sizes:" + e);
1549         }
1550     }
1551
1552    /**
1553      * Writes string to file. Basically same as "echo -n $string > $filename"
1554      *
1555      * @param filename
1556      * @param string
1557      * @throws IOException
1558      */
1559     private void stringToFile(String filename, String string) throws IOException {
1560         FileWriter out = new FileWriter(filename);
1561         try {
1562             out.write(string);
1563         } finally {
1564             out.close();
1565         }
1566     }
1567
1568
1569     /**
1570      * Adjust the per-process dns entries (net.dns<x>.<pid>) based
1571      * on the highest priority active net which this process requested.
1572      * If there aren't any, clear it out
1573      */
1574     private void reassessPidDns(int myPid, boolean doBump)
1575     {
1576         if (DBG) log("reassessPidDns for pid " + myPid);
1577         for(int i : mPriorityList) {
1578             if (mNetConfigs[i].isDefault()) {
1579                 continue;
1580             }
1581             NetworkStateTracker nt = mNetTrackers[i];
1582             if (nt.getNetworkInfo().isConnected() &&
1583                     !nt.isTeardownRequested()) {
1584                 LinkProperties p = nt.getLinkProperties();
1585                 if (p == null) continue;
1586                 List pids = mNetRequestersPids[i];
1587                 for (int j=0; j<pids.size(); j++) {
1588                     Integer pid = (Integer)pids.get(j);
1589                     if (pid.intValue() == myPid) {
1590                         Collection<InetAddress> dnses = p.getDnses();
1591                         writePidDns(dnses, myPid);
1592                         if (doBump) {
1593                             bumpDns();
1594                         }
1595                         return;
1596                     }
1597                 }
1598            }
1599         }
1600         // nothing found - delete
1601         for (int i = 1; ; i++) {
1602             String prop = "net.dns" + i + "." + myPid;
1603             if (SystemProperties.get(prop).length() == 0) {
1604                 if (doBump) {
1605                     bumpDns();
1606                 }
1607                 return;
1608             }
1609             SystemProperties.set(prop, "");
1610         }
1611     }
1612
1613     // return true if results in a change
1614     private boolean writePidDns(Collection <InetAddress> dnses, int pid) {
1615         int j = 1;
1616         boolean changed = false;
1617         for (InetAddress dns : dnses) {
1618             String dnsString = dns.getHostAddress();
1619             if (changed || !dnsString.equals(SystemProperties.get("net.dns" + j + "." + pid))) {
1620                 changed = true;
1621                 SystemProperties.set("net.dns" + j++ + "." + pid, dns.getHostAddress());
1622             }
1623         }
1624         return changed;
1625     }
1626
1627     private void bumpDns() {
1628         /*
1629          * Bump the property that tells the name resolver library to reread
1630          * the DNS server list from the properties.
1631          */
1632         String propVal = SystemProperties.get("net.dnschange");
1633         int n = 0;
1634         if (propVal.length() != 0) {
1635             try {
1636                 n = Integer.parseInt(propVal);
1637             } catch (NumberFormatException e) {}
1638         }
1639         SystemProperties.set("net.dnschange", "" + (n+1));
1640         /*
1641          * Tell the VMs to toss their DNS caches
1642          */
1643         Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE);
1644         intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
1645         /*
1646          * Connectivity events can happen before boot has completed ...
1647          */
1648         intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
1649         mContext.sendBroadcast(intent);
1650     }
1651
1652     private void handleDnsConfigurationChange(int netType) {
1653         // add default net's dns entries
1654         NetworkStateTracker nt = mNetTrackers[netType];
1655         if (nt != null && nt.getNetworkInfo().isConnected() && !nt.isTeardownRequested()) {
1656             LinkProperties p = nt.getLinkProperties();
1657             if (p == null) return;
1658             Collection<InetAddress> dnses = p.getDnses();
1659             boolean changed = false;
1660             if (mNetConfigs[netType].isDefault()) {
1661                 int j = 1;
1662                 if (dnses.size() == 0 && mDefaultDns != null) {
1663                     String dnsString = mDefaultDns.getHostAddress();
1664                     if (!dnsString.equals(SystemProperties.get("net.dns1"))) {
1665                         if (DBG) {
1666                             log("no dns provided - using " + dnsString);
1667                         }
1668                         changed = true;
1669                         SystemProperties.set("net.dns1", dnsString);
1670                     }
1671                     j++;
1672                 } else {
1673                     for (InetAddress dns : dnses) {
1674                         String dnsString = dns.getHostAddress();
1675                         if (!changed && dnsString.equals(SystemProperties.get("net.dns" + j))) {
1676                             j++;
1677                             continue;
1678                         }
1679                         if (DBG) {
1680                             log("adding dns " + dns + " for " +
1681                                     nt.getNetworkInfo().getTypeName());
1682                         }
1683                         changed = true;
1684                         SystemProperties.set("net.dns" + j++, dnsString);
1685                     }
1686                 }
1687                 for (int k=j ; k<mNumDnsEntries; k++) {
1688                     if (changed || !TextUtils.isEmpty(SystemProperties.get("net.dns" + k))) {
1689                         if (DBG) log("erasing net.dns" + k);
1690                         changed = true;
1691                         SystemProperties.set("net.dns" + k, "");
1692                     }
1693                 }
1694                 mNumDnsEntries = j;
1695             } else {
1696                 // set per-pid dns for attached secondary nets
1697                 List pids = mNetRequestersPids[netType];
1698                 for (int y=0; y< pids.size(); y++) {
1699                     Integer pid = (Integer)pids.get(y);
1700                     changed = writePidDns(dnses, pid.intValue());
1701                 }
1702             }
1703             if (changed) bumpDns();
1704         }
1705     }
1706
1707     private int getRestoreDefaultNetworkDelay(int networkType) {
1708         String restoreDefaultNetworkDelayStr = SystemProperties.get(
1709                 NETWORK_RESTORE_DELAY_PROP_NAME);
1710         if(restoreDefaultNetworkDelayStr != null &&
1711                 restoreDefaultNetworkDelayStr.length() != 0) {
1712             try {
1713                 return Integer.valueOf(restoreDefaultNetworkDelayStr);
1714             } catch (NumberFormatException e) {
1715             }
1716         }
1717         // if the system property isn't set, use the value for the apn type
1718         int ret = RESTORE_DEFAULT_NETWORK_DELAY;
1719
1720         if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) &&
1721                 (mNetConfigs[networkType] != null)) {
1722             ret = mNetConfigs[networkType].restoreTime;
1723         }
1724         return ret;
1725     }
1726
1727     @Override
1728     protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
1729         if (mContext.checkCallingOrSelfPermission(
1730                 android.Manifest.permission.DUMP)
1731                 != PackageManager.PERMISSION_GRANTED) {
1732             pw.println("Permission Denial: can't dump ConnectivityService " +
1733                     "from from pid=" + Binder.getCallingPid() + ", uid=" +
1734                     Binder.getCallingUid());
1735             return;
1736         }
1737         pw.println();
1738         for (NetworkStateTracker nst : mNetTrackers) {
1739             if (nst != null) {
1740                 if (nst.getNetworkInfo().isConnected()) {
1741                     pw.println("Active network: " + nst.getNetworkInfo().
1742                             getTypeName());
1743                 }
1744                 pw.println(nst.getNetworkInfo());
1745                 pw.println(nst);
1746                 pw.println();
1747             }
1748         }
1749
1750         pw.println("Network Requester Pids:");
1751         for (int net : mPriorityList) {
1752             String pidString = net + ": ";
1753             for (Object pid : mNetRequestersPids[net]) {
1754                 pidString = pidString + pid.toString() + ", ";
1755             }
1756             pw.println(pidString);
1757         }
1758         pw.println();
1759
1760         pw.println("FeatureUsers:");
1761         for (Object requester : mFeatureUsers) {
1762             pw.println(requester.toString());
1763         }
1764         pw.println();
1765
1766         synchronized (this) {
1767             pw.println("NetworkTranstionWakeLock is currently " +
1768                     (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held.");
1769             pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy);
1770         }
1771         pw.println();
1772
1773         mTethering.dump(fd, pw, args);
1774
1775         if (mInetLog != null) {
1776             pw.println();
1777             pw.println("Inet condition reports:");
1778             for(int i = 0; i < mInetLog.size(); i++) {
1779                 pw.println(mInetLog.get(i));
1780             }
1781         }
1782     }
1783
1784     // must be stateless - things change under us.
1785     private class MyHandler extends Handler {
1786         public MyHandler(Looper looper) {
1787             super(looper);
1788         }
1789
1790         @Override
1791         public void handleMessage(Message msg) {
1792             NetworkInfo info;
1793             switch (msg.what) {
1794                 case NetworkStateTracker.EVENT_STATE_CHANGED:
1795                     info = (NetworkInfo) msg.obj;
1796                     int type = info.getType();
1797                     NetworkInfo.State state = info.getState();
1798
1799                     if (DBG) log("ConnectivityChange for " +
1800                             info.getTypeName() + ": " +
1801                             state + "/" + info.getDetailedState());
1802
1803                     // Connectivity state changed:
1804                     // [31-13] Reserved for future use
1805                     // [12-9] Network subtype (for mobile network, as defined
1806                     //         by TelephonyManager)
1807                     // [8-3] Detailed state ordinal (as defined by
1808                     //         NetworkInfo.DetailedState)
1809                     // [2-0] Network type (as defined by ConnectivityManager)
1810                     int eventLogParam = (info.getType() & 0x7) |
1811                             ((info.getDetailedState().ordinal() & 0x3f) << 3) |
1812                             (info.getSubtype() << 9);
1813                     EventLog.writeEvent(EventLogTags.CONNECTIVITY_STATE_CHANGED,
1814                             eventLogParam);
1815
1816                     if (info.getDetailedState() ==
1817                             NetworkInfo.DetailedState.FAILED) {
1818                         handleConnectionFailure(info);
1819                     } else if (state == NetworkInfo.State.DISCONNECTED) {
1820                         handleDisconnect(info);
1821                     } else if (state == NetworkInfo.State.SUSPENDED) {
1822                         // TODO: need to think this over.
1823                         // the logic here is, handle SUSPENDED the same as
1824                         // DISCONNECTED. The only difference being we are
1825                         // broadcasting an intent with NetworkInfo that's
1826                         // suspended. This allows the applications an
1827                         // opportunity to handle DISCONNECTED and SUSPENDED
1828                         // differently, or not.
1829                         handleDisconnect(info);
1830                     } else if (state == NetworkInfo.State.CONNECTED) {
1831                         handleConnect(info);
1832                     }
1833                     break;
1834                 case NetworkStateTracker.EVENT_CONFIGURATION_CHANGED:
1835                     info = (NetworkInfo) msg.obj;
1836                     handleConnectivityChange(info.getType());
1837                     break;
1838                 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK:
1839                     String causedBy = null;
1840                     synchronized (ConnectivityService.this) {
1841                         if (msg.arg1 == mNetTransitionWakeLockSerialNumber &&
1842                                 mNetTransitionWakeLock.isHeld()) {
1843                             mNetTransitionWakeLock.release();
1844                             causedBy = mNetTransitionWakeLockCausedBy;
1845                         }
1846                     }
1847                     if (causedBy != null) {
1848                         log("NetTransition Wakelock for " + causedBy + " released by timeout");
1849                     }
1850                     break;
1851                 case EVENT_RESTORE_DEFAULT_NETWORK:
1852                     FeatureUser u = (FeatureUser)msg.obj;
1853                     u.expire();
1854                     break;
1855                 case EVENT_INET_CONDITION_CHANGE:
1856                 {
1857                     int netType = msg.arg1;
1858                     int condition = msg.arg2;
1859                     handleInetConditionChange(netType, condition);
1860                     break;
1861                 }
1862                 case EVENT_INET_CONDITION_HOLD_END:
1863                 {
1864                     int netType = msg.arg1;
1865                     int sequence = msg.arg2;
1866                     handleInetConditionHoldEnd(netType, sequence);
1867                     break;
1868                 }
1869                 case EVENT_SET_NETWORK_PREFERENCE:
1870                 {
1871                     int preference = msg.arg1;
1872                     handleSetNetworkPreference(preference);
1873                     break;
1874                 }
1875                 case EVENT_SET_BACKGROUND_DATA:
1876                 {
1877                     boolean enabled = (msg.arg1 == ENABLED);
1878                     handleSetBackgroundData(enabled);
1879                     break;
1880                 }
1881                 case EVENT_SET_MOBILE_DATA:
1882                 {
1883                     boolean enabled = (msg.arg1 == ENABLED);
1884                     handleSetMobileData(enabled);
1885                     break;
1886                 }
1887                 case EVENT_APPLY_GLOBAL_HTTP_PROXY:
1888                 {
1889                     handleDeprecatedGlobalHttpProxy();
1890                     break;
1891                 }
1892                 case EVENT_SET_DEPENDENCY_MET:
1893                 {
1894                     boolean met = (msg.arg1 == ENABLED);
1895                     handleSetDependencyMet(msg.arg2, met);
1896                     break;
1897                 }
1898             }
1899         }
1900     }
1901
1902     // javadoc from interface
1903     public int tether(String iface) {
1904         enforceTetherChangePermission();
1905
1906         if (isTetheringSupported()) {
1907             return mTethering.tether(iface);
1908         } else {
1909             return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
1910         }
1911     }
1912
1913     // javadoc from interface
1914     public int untether(String iface) {
1915         enforceTetherChangePermission();
1916
1917         if (isTetheringSupported()) {
1918             return mTethering.untether(iface);
1919         } else {
1920             return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
1921         }
1922     }
1923
1924     // javadoc from interface
1925     public int getLastTetherError(String iface) {
1926         enforceTetherAccessPermission();
1927
1928         if (isTetheringSupported()) {
1929             return mTethering.getLastTetherError(iface);
1930         } else {
1931             return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
1932         }
1933     }
1934
1935     // TODO - proper iface API for selection by property, inspection, etc
1936     public String[] getTetherableUsbRegexs() {
1937         enforceTetherAccessPermission();
1938         if (isTetheringSupported()) {
1939             return mTethering.getTetherableUsbRegexs();
1940         } else {
1941             return new String[0];
1942         }
1943     }
1944
1945     public String[] getTetherableWifiRegexs() {
1946         enforceTetherAccessPermission();
1947         if (isTetheringSupported()) {
1948             return mTethering.getTetherableWifiRegexs();
1949         } else {
1950             return new String[0];
1951         }
1952     }
1953
1954     public String[] getTetherableBluetoothRegexs() {
1955         enforceTetherAccessPermission();
1956         if (isTetheringSupported()) {
1957             return mTethering.getTetherableBluetoothRegexs();
1958         } else {
1959             return new String[0];
1960         }
1961     }
1962
1963     // TODO - move iface listing, queries, etc to new module
1964     // javadoc from interface
1965     public String[] getTetherableIfaces() {
1966         enforceTetherAccessPermission();
1967         return mTethering.getTetherableIfaces();
1968     }
1969
1970     public String[] getTetheredIfaces() {
1971         enforceTetherAccessPermission();
1972         return mTethering.getTetheredIfaces();
1973     }
1974
1975     public String[] getTetheringErroredIfaces() {
1976         enforceTetherAccessPermission();
1977         return mTethering.getErroredIfaces();
1978     }
1979
1980     // if ro.tether.denied = true we default to no tethering
1981     // gservices could set the secure setting to 1 though to enable it on a build where it
1982     // had previously been turned off.
1983     public boolean isTetheringSupported() {
1984         enforceTetherAccessPermission();
1985         int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1);
1986         boolean tetherEnabledInSettings = (Settings.Secure.getInt(mContext.getContentResolver(),
1987                 Settings.Secure.TETHER_SUPPORTED, defaultVal) != 0);
1988         return tetherEnabledInSettings && mTetheringConfigValid;
1989     }
1990
1991     // An API NetworkStateTrackers can call when they lose their network.
1992     // This will automatically be cleared after X seconds or a network becomes CONNECTED,
1993     // whichever happens first.  The timer is started by the first caller and not
1994     // restarted by subsequent callers.
1995     public void requestNetworkTransitionWakelock(String forWhom) {
1996         enforceConnectivityInternalPermission();
1997         synchronized (this) {
1998             if (mNetTransitionWakeLock.isHeld()) return;
1999             mNetTransitionWakeLockSerialNumber++;
2000             mNetTransitionWakeLock.acquire();
2001             mNetTransitionWakeLockCausedBy = forWhom;
2002         }
2003         mHandler.sendMessageDelayed(mHandler.obtainMessage(
2004                 EVENT_CLEAR_NET_TRANSITION_WAKELOCK,
2005                 mNetTransitionWakeLockSerialNumber, 0),
2006                 mNetTransitionWakeLockTimeout);
2007         return;
2008     }
2009
2010     // 100 percent is full good, 0 is full bad.
2011     public void reportInetCondition(int networkType, int percentage) {
2012         if (DBG) log("reportNetworkCondition(" + networkType + ", " + percentage + ")");
2013         mContext.enforceCallingOrSelfPermission(
2014                 android.Manifest.permission.STATUS_BAR,
2015                 "ConnectivityService");
2016
2017         if (DBG) {
2018             int pid = getCallingPid();
2019             int uid = getCallingUid();
2020             String s = pid + "(" + uid + ") reports inet is " +
2021                 (percentage > 50 ? "connected" : "disconnected") + " (" + percentage + ") on " +
2022                 "network Type " + networkType + " at " + GregorianCalendar.getInstance().getTime();
2023             mInetLog.add(s);
2024             while(mInetLog.size() > INET_CONDITION_LOG_MAX_SIZE) {
2025                 mInetLog.remove(0);
2026             }
2027         }
2028         mHandler.sendMessage(mHandler.obtainMessage(
2029             EVENT_INET_CONDITION_CHANGE, networkType, percentage));
2030     }
2031
2032     private void handleInetConditionChange(int netType, int condition) {
2033         if (DBG) {
2034             log("Inet connectivity change, net=" +
2035                     netType + ", condition=" + condition +
2036                     ",mActiveDefaultNetwork=" + mActiveDefaultNetwork);
2037         }
2038         if (mActiveDefaultNetwork == -1) {
2039             if (DBG) log("no active default network - aborting");
2040             return;
2041         }
2042         if (mActiveDefaultNetwork != netType) {
2043             if (DBG) log("given net not default - aborting");
2044             return;
2045         }
2046         mDefaultInetCondition = condition;
2047         int delay;
2048         if (mInetConditionChangeInFlight == false) {
2049             if (DBG) log("starting a change hold");
2050             // setup a new hold to debounce this
2051             if (mDefaultInetCondition > 50) {
2052                 delay = Settings.Secure.getInt(mContext.getContentResolver(),
2053                         Settings.Secure.INET_CONDITION_DEBOUNCE_UP_DELAY, 500);
2054             } else {
2055                 delay = Settings.Secure.getInt(mContext.getContentResolver(),
2056                 Settings.Secure.INET_CONDITION_DEBOUNCE_DOWN_DELAY, 3000);
2057             }
2058             mInetConditionChangeInFlight = true;
2059             mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_INET_CONDITION_HOLD_END,
2060                     mActiveDefaultNetwork, mDefaultConnectionSequence), delay);
2061         } else {
2062             // we've set the new condition, when this hold ends that will get
2063             // picked up
2064             if (DBG) log("currently in hold - not setting new end evt");
2065         }
2066     }
2067
2068     private void handleInetConditionHoldEnd(int netType, int sequence) {
2069         if (DBG) {
2070             log("Inet hold end, net=" + netType +
2071                     ", condition =" + mDefaultInetCondition +
2072                     ", published condition =" + mDefaultInetConditionPublished);
2073         }
2074         mInetConditionChangeInFlight = false;
2075
2076         if (mActiveDefaultNetwork == -1) {
2077             if (DBG) log("no active default network - aborting");
2078             return;
2079         }
2080         if (mDefaultConnectionSequence != sequence) {
2081             if (DBG) log("event hold for obsolete network - aborting");
2082             return;
2083         }
2084         if (mDefaultInetConditionPublished == mDefaultInetCondition) {
2085             if (DBG) log("no change in condition - aborting");
2086             return;
2087         }
2088         NetworkInfo networkInfo = mNetTrackers[mActiveDefaultNetwork].getNetworkInfo();
2089         if (networkInfo.isConnected() == false) {
2090             if (DBG) log("default network not connected - aborting");
2091             return;
2092         }
2093         mDefaultInetConditionPublished = mDefaultInetCondition;
2094         sendInetConditionBroadcast(networkInfo);
2095         return;
2096     }
2097
2098     public synchronized ProxyProperties getProxy() {
2099         if (mGlobalProxy != null) return mGlobalProxy;
2100         if (mDefaultProxy != null) return mDefaultProxy;
2101         return null;
2102     }
2103
2104     public void setGlobalProxy(ProxyProperties proxyProperties) {
2105         enforceChangePermission();
2106         synchronized (mGlobalProxyLock) {
2107             if (proxyProperties == mGlobalProxy) return;
2108             if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return;
2109             if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return;
2110
2111             String host = "";
2112             int port = 0;
2113             String exclList = "";
2114             if (proxyProperties != null && !TextUtils.isEmpty(proxyProperties.getHost())) {
2115                 mGlobalProxy = new ProxyProperties(proxyProperties);
2116                 host = mGlobalProxy.getHost();
2117                 port = mGlobalProxy.getPort();
2118                 exclList = mGlobalProxy.getExclusionList();
2119             } else {
2120                 mGlobalProxy = null;
2121             }
2122             ContentResolver res = mContext.getContentResolver();
2123             Settings.Secure.putString(res, Settings.Secure.GLOBAL_HTTP_PROXY_HOST, host);
2124             Settings.Secure.putInt(res, Settings.Secure.GLOBAL_HTTP_PROXY_PORT, port);
2125             Settings.Secure.putString(res, Settings.Secure.GLOBAL_HTTP_PROXY_EXCLUSION_LIST,
2126                     exclList);
2127         }
2128
2129         if (mGlobalProxy == null) {
2130             proxyProperties = mDefaultProxy;
2131         }
2132         sendProxyBroadcast(proxyProperties);
2133     }
2134
2135     private void loadGlobalProxy() {
2136         ContentResolver res = mContext.getContentResolver();
2137         String host = Settings.Secure.getString(res, Settings.Secure.GLOBAL_HTTP_PROXY_HOST);
2138         int port = Settings.Secure.getInt(res, Settings.Secure.GLOBAL_HTTP_PROXY_PORT, 0);
2139         String exclList = Settings.Secure.getString(res,
2140                 Settings.Secure.GLOBAL_HTTP_PROXY_EXCLUSION_LIST);
2141         if (!TextUtils.isEmpty(host)) {
2142             ProxyProperties proxyProperties = new ProxyProperties(host, port, exclList);
2143             synchronized (mGlobalProxyLock) {
2144                 mGlobalProxy = proxyProperties;
2145             }
2146         }
2147     }
2148
2149     public ProxyProperties getGlobalProxy() {
2150         synchronized (mGlobalProxyLock) {
2151             return mGlobalProxy;
2152         }
2153     }
2154
2155     private void handleApplyDefaultProxy(int type) {
2156         // check if new default - push it out to all VM if so
2157         ProxyProperties proxy = mNetTrackers[type].getLinkProperties().getHttpProxy();
2158         synchronized (this) {
2159             if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return;
2160             if (mDefaultProxy == proxy) return;
2161             if (!TextUtils.isEmpty(proxy.getHost())) {
2162                 mDefaultProxy = proxy;
2163             } else {
2164                 mDefaultProxy = null;
2165             }
2166         }
2167         if (DBG) log("changing default proxy to " + proxy);
2168         if ((proxy == null && mGlobalProxy == null) || proxy.equals(mGlobalProxy)) return;
2169         if (mGlobalProxy != null) return;
2170         sendProxyBroadcast(proxy);
2171     }
2172
2173     private void handleDeprecatedGlobalHttpProxy() {
2174         String proxy = Settings.Secure.getString(mContext.getContentResolver(),
2175                 Settings.Secure.HTTP_PROXY);
2176         if (!TextUtils.isEmpty(proxy)) {
2177             String data[] = proxy.split(":");
2178             String proxyHost =  data[0];
2179             int proxyPort = 8080;
2180             if (data.length > 1) {
2181                 try {
2182                     proxyPort = Integer.parseInt(data[1]);
2183                 } catch (NumberFormatException e) {
2184                     return;
2185                 }
2186             }
2187             ProxyProperties p = new ProxyProperties(data[0], proxyPort, "");
2188             setGlobalProxy(p);
2189         }
2190     }
2191
2192     private void sendProxyBroadcast(ProxyProperties proxy) {
2193         if (proxy == null) proxy = new ProxyProperties("", 0, "");
2194         log("sending Proxy Broadcast for " + proxy);
2195         Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
2196         intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING |
2197             Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
2198         intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy);
2199         mContext.sendStickyBroadcast(intent);
2200     }
2201
2202     private static class SettingsObserver extends ContentObserver {
2203         private int mWhat;
2204         private Handler mHandler;
2205         SettingsObserver(Handler handler, int what) {
2206             super(handler);
2207             mHandler = handler;
2208             mWhat = what;
2209         }
2210
2211         void observe(Context context) {
2212             ContentResolver resolver = context.getContentResolver();
2213             resolver.registerContentObserver(Settings.Secure.getUriFor(
2214                     Settings.Secure.HTTP_PROXY), false, this);
2215         }
2216
2217         @Override
2218         public void onChange(boolean selfChange) {
2219             mHandler.obtainMessage(mWhat).sendToTarget();
2220         }
2221     }
2222
2223     private void handleTetherIfaceChange(int type) {
2224         String iface = mNetTrackers[type].getLinkProperties().getInterfaceName();
2225
2226         if (isTetheringSupported()) {
2227             mTethering.handleTetherIfaceChange(iface);
2228         }
2229     }
2230
2231     private void log(String s) {
2232         Slog.d(TAG, s);
2233     }
2234
2235     private void loge(String s) {
2236         Slog.e(TAG, s);
2237     }
2238     int convertFeatureToNetworkType(String feature){
2239         int networkType = -1;
2240         if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_MMS)) {
2241             networkType = ConnectivityManager.TYPE_MOBILE_MMS;
2242         } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_SUPL)) {
2243             networkType = ConnectivityManager.TYPE_MOBILE_SUPL;
2244         } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_DUN) ||
2245                 TextUtils.equals(feature, Phone.FEATURE_ENABLE_DUN_ALWAYS)) {
2246             networkType = ConnectivityManager.TYPE_MOBILE_DUN;
2247         } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_HIPRI)) {
2248             networkType = ConnectivityManager.TYPE_MOBILE_HIPRI;
2249         } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_FOTA)) {
2250             networkType = ConnectivityManager.TYPE_MOBILE_FOTA;
2251         } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_IMS)) {
2252             networkType = ConnectivityManager.TYPE_MOBILE_IMS;
2253         } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_CBS)) {
2254             networkType = ConnectivityManager.TYPE_MOBILE_CBS;
2255         }
2256         return networkType;
2257     }
2258 }