/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server;
import static android.Manifest.permission.MANAGE_NETWORK_POLICY;
import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
import static android.net.ConnectivityManager.CONNECTIVITY_ACTION_IMMEDIATE;
import static android.net.ConnectivityManager.isNetworkTypeValid;
import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL;
import static android.net.NetworkPolicyManager.RULE_REJECT_METERED;
import android.bluetooth.BluetoothTetheringDataTracker;
import android.content.ContentResolver;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.net.ConnectivityManager;
import android.net.DummyDataStateTracker;
import android.net.EthernetDataTracker;
import android.net.IConnectivityManager;
import android.net.INetworkPolicyListener;
import android.net.INetworkPolicyManager;
import android.net.INetworkStatsService;
import android.net.LinkAddress;
import android.net.LinkProperties;
import android.net.LinkProperties.CompareResult;
import android.net.MobileDataStateTracker;
import android.net.NetworkConfig;
import android.net.NetworkInfo;
import android.net.NetworkInfo.DetailedState;
import android.net.NetworkQuotaInfo;
import android.net.NetworkState;
import android.net.NetworkStateTracker;
import android.net.NetworkUtils;
import android.net.Proxy;
import android.net.ProxyProperties;
import android.net.RouteInfo;
import android.net.wifi.WifiStateTracker;
import android.net.wimax.WimaxManagerConstants;
import android.os.Binder;
import android.os.FileUtils;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.INetworkManagementService;
import android.os.Looper;
import android.os.Message;
import android.os.ParcelFileDescriptor;
import android.os.PowerManager;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemProperties;
import android.provider.Settings;
import android.text.TextUtils;
import android.util.EventLog;
import android.util.Slog;
import android.util.SparseIntArray;
import com.android.internal.net.LegacyVpnInfo;
import com.android.internal.net.VpnConfig;
import com.android.internal.telephony.Phone;
import com.android.server.am.BatteryStatsService;
import com.android.server.connectivity.Tethering;
import com.android.server.connectivity.Vpn;
import com.google.android.collect.Lists;
import com.google.android.collect.Sets;
import dalvik.system.DexClassLoader;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.InvocationTargetException;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.GregorianCalendar;
import java.util.HashSet;
import java.util.List;
/**
* @hide
*/
public class ConnectivityService extends IConnectivityManager.Stub {
private static final boolean DBG = true;
private static final boolean VDBG = false;
private static final String TAG = "ConnectivityService";
private static final boolean LOGD_RULES = false;
// how long to wait before switching back to a radio's default network
private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000;
// system property that can override the above value
private static final String NETWORK_RESTORE_DELAY_PROP_NAME =
"android.telephony.apn-restore";
// used in recursive route setting to add gateways for the host for which
// a host route was requested.
private static final int MAX_HOSTROUTE_CYCLE_COUNT = 10;
private Tethering mTethering;
private boolean mTetheringConfigValid = false;
private Vpn mVpn;
/** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */
private Object mRulesLock = new Object();
/** Currently active network rules by UID. */
private SparseIntArray mUidRules = new SparseIntArray();
/** Set of ifaces that are costly. */
private HashSet<String> mMeteredIfaces = Sets.newHashSet();
/**
* Sometimes we want to refer to the individual network state
* trackers separately, and sometimes we just want to treat them
* abstractly.
*/
private NetworkStateTracker mNetTrackers[];
/**
* The link properties that define the current links
*/
private LinkProperties mCurrentLinkProperties[];
/**
* A per Net list of the PID's that requested access to the net
* used both as a refcount and for per-PID DNS selection
*/
private List mNetRequestersPids[];
// priority order of the nettrackers
// (excluding dynamically set mNetworkPreference)
// TODO - move mNetworkTypePreference into this
private int[] mPriorityList;
private Context mContext;
private int mNetworkPreference;
private int mActiveDefaultNetwork = -1;
// 0 is full bad, 100 is full good
private int mDefaultInetCondition = 0;
private int mDefaultInetConditionPublished = 0;
private boolean mInetConditionChangeInFlight = false;
private int mDefaultConnectionSequence = 0;
private Object mDnsLock = new Object();
private int mNumDnsEntries;
private boolean mDnsOverridden = false;
private boolean mTestMode;
private static ConnectivityService sServiceInstance;
private INetworkManagementService mNetd;
private INetworkPolicyManager mPolicyManager;
private static final int ENABLED = 1;
private static final int DISABLED = 0;
private static final boolean ADD = true;
private static final boolean REMOVE = false;
private static final boolean TO_DEFAULT_TABLE = true;
private static final boolean TO_SECONDARY_TABLE = false;
// Share the event space with NetworkStateTracker (which can't see this
// internal class but sends us events). If you change these, change
// NetworkStateTracker.java too.
private static final int MIN_NETWORK_STATE_TRACKER_EVENT = 1;
private static final int MAX_NETWORK_STATE_TRACKER_EVENT = 100;
/**
* used internally as a delayed event to make us switch back to the
* default network
*/
private static final int EVENT_RESTORE_DEFAULT_NETWORK =
MAX_NETWORK_STATE_TRACKER_EVENT + 1;
/**
* used internally to change our mobile data enabled flag
*/
private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED =
MAX_NETWORK_STATE_TRACKER_EVENT + 2;
/**
* used internally to change our network preference setting
* arg1 = networkType to prefer
*/
private static final int EVENT_SET_NETWORK_PREFERENCE =
MAX_NETWORK_STATE_TRACKER_EVENT + 3;
/**
* used internally to synchronize inet condition reports
* arg1 = networkType
* arg2 = condition (0 bad, 100 good)
*/
private static final int EVENT_INET_CONDITION_CHANGE =
MAX_NETWORK_STATE_TRACKER_EVENT + 4;
/**
* used internally to mark the end of inet condition hold periods
* arg1 = networkType
*/
private static final int EVENT_INET_CONDITION_HOLD_END =
MAX_NETWORK_STATE_TRACKER_EVENT + 5;
/**
* used internally to set enable/disable cellular data
* arg1 = ENBALED or DISABLED
*/
private static final int EVENT_SET_MOBILE_DATA =
MAX_NETWORK_STATE_TRACKER_EVENT + 7;
/**
* used internally to clear a wakelock when transitioning
* from one net to another
*/
private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK =
MAX_NETWORK_STATE_TRACKER_EVENT + 8;
/**
* used internally to reload global proxy settings
*/
private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY =
MAX_NETWORK_STATE_TRACKER_EVENT + 9;
/**
* used internally to set external dependency met/unmet
* arg1 = ENABLED (met) or DISABLED (unmet)
* arg2 = NetworkType
*/
private static final int EVENT_SET_DEPENDENCY_MET =
MAX_NETWORK_STATE_TRACKER_EVENT + 10;
/**
* used internally to restore DNS properties back to the
* default network
*/
private static final int EVENT_RESTORE_DNS =
MAX_NETWORK_STATE_TRACKER_EVENT + 11;
/**
* used internally to send a sticky broadcast delayed.
*/
private static final int EVENT_SEND_STICKY_BROADCAST_INTENT =
MAX_NETWORK_STATE_TRACKER_EVENT + 12;
/**
* Used internally to
* {@link NetworkStateTracker#setPolicyDataEnable(boolean)}.
*/
private static final int EVENT_SET_POLICY_DATA_ENABLE = MAX_NETWORK_STATE_TRACKER_EVENT + 13;
private Handler mHandler;
// list of DeathRecipients used to make sure features are turned off when
// a process dies
private List<FeatureUser> mFeatureUsers;
private boolean mSystemReady;
private Intent mInitialBroadcast;
private PowerManager.WakeLock mNetTransitionWakeLock;
private String mNetTransitionWakeLockCausedBy = "";
private int mNetTransitionWakeLockSerialNumber;
private int mNetTransitionWakeLockTimeout;
private InetAddress mDefaultDns;
// this collection is used to refcount the added routes - if there are none left
// it's time to remove the route from the route table
private Collection<RouteInfo> mAddedRoutes = new ArrayList<RouteInfo>();
// used in DBG mode to track inet condition reports
private static final int INET_CONDITION_LOG_MAX_SIZE = 15;
private ArrayList mInetLog;
// track the current default http proxy - tell the world if we get a new one (real change)
private ProxyProperties mDefaultProxy = null;
private Object mDefaultProxyLock = new Object();
private boolean mDefaultProxyDisabled = false;
// track the global proxy.
private ProxyProperties mGlobalProxy = null;
private final Object mGlobalProxyLock = new Object();
private SettingsObserver mSettingsObserver;
NetworkConfig[] mNetConfigs;
int mNetworksDefined;
private static class RadioAttributes {
public int mSimultaneity;
public int mType;
public RadioAttributes(String init) {
String fragments[] = init.split(",");
mType = Integer.parseInt(fragments[0]);
mSimultaneity = Integer.parseInt(fragments[1]);
}
}
RadioAttributes[] mRadioAttributes;
// the set of network types that can only be enabled by system/sig apps
List mProtectedNetworks;
public ConnectivityService(Context context, INetworkManagementService netd,
INetworkStatsService statsService, INetworkPolicyManager policyManager) {
if (DBG) log("ConnectivityService starting up");
HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread");
handlerThread.start();
mHandler = new MyHandler(handlerThread.getLooper());
// setup our unique device name
if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) {
String id = Settings.Secure.getString(context.getContentResolver(),
Settings.Secure.ANDROID_ID);
if (id != null && id.length() > 0) {
String name = new String("android-").concat(id);
SystemProperties.set("net.hostname", name);
}
}
// read our default dns server ip
String dns = Settings.Secure.getString(context.getContentResolver(),
Settings.Secure.DEFAULT_DNS_SERVER);
if (dns == null || dns.length() == 0) {
dns = context.getResources().getString(
com.android.internal.R.string.config_default_dns_server);
}
try {
mDefaultDns = NetworkUtils.numericToInetAddress(dns);
} catch (IllegalArgumentException e) {
loge("Error setting defaultDns using " + dns);
}
mContext = checkNotNull(context, "missing Context");
mNetd = checkNotNull(netd, "missing INetworkManagementService");
mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager");
try {
mPolicyManager.registerListener(mPolicyListener);
} catch (RemoteException e) {
// ouch, no rules updates means some processes may never get network
loge("unable to register INetworkPolicyListener" + e.toString());
}
final PowerManager powerManager = (PowerManager) context.getSystemService(
Context.POWER_SERVICE);
mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
mNetTransitionWakeLockTimeout = mContext.getResources().getInteger(
com.android.internal.R.integer.config_networkTransitionTimeout);
mNetTrackers = new NetworkStateTracker[
ConnectivityManager.MAX_NETWORK_TYPE+1];
mCurrentLinkProperties = new LinkProperties[ConnectivityManager.MAX_NETWORK_TYPE+1];
mNetworkPreference = getPersistedNetworkPreference();
mRadioAttributes = new RadioAttributes[ConnectivityManager.MAX_RADIO_TYPE+1];
mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1];
// Load device network attributes from resources
String[] raStrings = context.getResources().getStringArray(
com.android.internal.R.array.radioAttributes);
for (String raString : raStrings) {
RadioAttributes r = new RadioAttributes(raString);
if (r.mType > ConnectivityManager.MAX_RADIO_TYPE) {
loge("Error in radioAttributes - ignoring attempt to define type " + r.mType);
continue;
}
if (mRadioAttributes[r.mType] != null) {
loge("Error in radioAttributes - ignoring attempt to redefine type " +
r.mType);
continue;
}
mRadioAttributes[r.mType] = r;
}
String[] naStrings = context.getResources().getStringArray(
com.android.internal.R.array.networkAttributes);
for (String naString : naStrings) {
try {
NetworkConfig n = new NetworkConfig(naString);
if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) {
loge("Error in networkAttributes - ignoring attempt to define type " +
n.type);
continue;
}
if (mNetConfigs[n.type] != null) {
loge("Error in networkAttributes - ignoring attempt to redefine type " +
n.type);
continue;
}
if (mRadioAttributes[n.radio] == null) {
loge("Error in networkAttributes - ignoring attempt to use undefined " +
"radio " + n.radio + " in network type " + n.type);
continue;
}
mNetConfigs[n.type] = n;
mNetworksDefined++;
} catch(Exception e) {
// ignore it - leave the entry null
}
}
mProtectedNetworks = new ArrayList<Integer>();
int[] protectedNetworks = context.getResources().getIntArray(
com.android.internal.R.array.config_protectedNetworks);
for (int p : protectedNetworks) {
if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) {
mProtectedNetworks.add(p);
} else {
if (DBG) loge("Ignoring protectedNetwork " + p);
}
}
// high priority first
mPriorityList = new int[mNetworksDefined];
{
int insertionPoint = mNetworksDefined-1;
int currentLowest = 0;
int nextLowest = 0;
while (insertionPoint > -1) {
for (NetworkConfig na : mNetConfigs) {
if (na == null) continue;
if (na.priority < currentLowest) continue;
if (na.priority > currentLowest) {
if (na.priority < nextLowest || nextLowest == 0) {
nextLowest = na.priority;
}
continue;
}
mPriorityList[insertionPoint--] = na.type;
}
currentLowest = nextLowest;
nextLowest = 0;
}
}
mNetRequestersPids = new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE+1];
for (int i : mPriorityList) {
mNetRequestersPids[i] = new ArrayList();
}
mFeatureUsers = new ArrayList<FeatureUser>();
mNumDnsEntries = 0;
mTestMode = SystemProperties.get("cm.test.mode").equals("true")
&& SystemProperties.get("ro.build.type").equals("eng");
/*
* Create the network state trackers for Wi-Fi and mobile
* data. Maybe this could be done with a factory class,
* but it's not clear that it's worth it, given that
* the number of different network types is not going
* to change very often.
*/
for (int netType : mPriorityList) {
switch (mNetConfigs[netType].radio) {
case ConnectivityManager.TYPE_WIFI:
mNetTrackers[netType] = new WifiStateTracker(netType,
mNetConfigs[netType].name);
mNetTrackers[netType].startMonitoring(context, mHandler);
break;
case ConnectivityManager.TYPE_MOBILE:
mNetTrackers[netType] = new MobileDataStateTracker(netType,
mNetConfigs[netType].name);
mNetTrackers[netType].startMonitoring(context, mHandler);
break;
case ConnectivityManager.TYPE_DUMMY:
mNetTrackers[netType] = new DummyDataStateTracker(netType,
mNetConfigs[netType].name);
mNetTrackers[netType].startMonitoring(context, mHandler);
break;
case ConnectivityManager.TYPE_BLUETOOTH:
mNetTrackers[netType] = BluetoothTetheringDataTracker.getInstance();
mNetTrackers[netType].startMonitoring(context, mHandler);
break;
case ConnectivityManager.TYPE_WIMAX:
mNetTrackers[netType] = makeWimaxStateTracker();
if (mNetTrackers[netType]!= null) {
mNetTrackers[netType].startMonitoring(context, mHandler);
}
break;
case ConnectivityManager.TYPE_ETHERNET:
mNetTrackers[netType] = EthernetDataTracker.getInstance();
mNetTrackers[netType].startMonitoring(context, mHandler);
break;
default:
loge("Trying to create a DataStateTracker for an unknown radio type " +
mNetConfigs[netType].radio);
continue;
}
mCurrentLinkProperties[netType] = null;
if (mNetTrackers[netType] != null && mNetConfigs[netType].isDefault()) {
mNetTrackers[netType].reconnect();
}
}
IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE);
INetworkManagementService nmService = INetworkManagementService.Stub.asInterface(b);
mTethering = new Tethering(mContext, nmService, statsService, this, mHandler.getLooper());
mTetheringConfigValid = ((mTethering.getTetherableUsbRegexs().length != 0 ||
mTethering.getTetherableWifiRegexs().length != 0 ||
mTethering.getTetherableBluetoothRegexs().length != 0) &&
mTethering.getUpstreamIfaceTypes().length != 0);
mVpn = new Vpn(mContext, new VpnCallback());
try {
nmService.registerObserver(mTethering);
nmService.registerObserver(mVpn);
} catch (RemoteException e) {
loge("Error registering observer :" + e);
}
if (DBG) {
mInetLog = new ArrayList();
}
mSettingsObserver = new SettingsObserver(mHandler, EVENT_APPLY_GLOBAL_HTTP_PROXY);
mSettingsObserver.observe(mContext);
loadGlobalProxy();
}
private NetworkStateTracker makeWimaxStateTracker() {
//Initialize Wimax
DexClassLoader wimaxClassLoader;
Class wimaxStateTrackerClass = null;
Class wimaxServiceClass = null;
Class wimaxManagerClass;
String wimaxJarLocation;
String wimaxLibLocation;
String wimaxManagerClassName;
String wimaxServiceClassName;
String wimaxStateTrackerClassName;
NetworkStateTracker wimaxStateTracker = null;
boolean isWimaxEnabled = mContext.getResources().getBoolean(
com.android.internal.R.bool.config_wimaxEnabled);
if (isWimaxEnabled) {
try {
wimaxJarLocation = mContext.getResources().getString(
com.android.internal.R.string.config_wimaxServiceJarLocation);
wimaxLibLocation = mContext.getResources().getString(
com.android.internal.R.string.config_wimaxNativeLibLocation);
wimaxManagerClassName = mContext.getResources().getString(
com.android.internal.R.string.config_wimaxManagerClassname);
wimaxServiceClassName = mContext.getResources().getString(
com.android.internal.R.string.config_wimaxServiceClassname);
wimaxStateTrackerClassName = mContext.getResources().getString(
com.android.internal.R.string.config_wimaxStateTrackerClassname);
log("wimaxJarLocation: " + wimaxJarLocation);
wimaxClassLoader = new DexClassLoader(wimaxJarLocation,
new ContextWrapper(mContext).getCacheDir().getAbsolutePath(),
wimaxLibLocation, ClassLoader.getSystemClassLoader());
try {
wimaxManagerClass = wimaxClassLoader.loadClass(wimaxManagerClassName);
wimaxStateTrackerClass = wimaxClassLoader.loadClass(wimaxStateTrackerClassName);
wimaxServiceClass = wimaxClassLoader.loadClass(wimaxServiceClassName);
} catch (ClassNotFoundException ex) {
loge("Exception finding Wimax classes: " + ex.toString());
return null;
}
} catch(Resources.NotFoundException ex) {
loge("Wimax Resources does not exist!!! ");
return null;
}
try {
log("Starting Wimax Service... ");
Constructor wmxStTrkrConst = wimaxStateTrackerClass.getConstructor
(new Class[] {Context.class, Handler.class});
wimaxStateTracker = (NetworkStateTracker)wmxStTrkrConst.newInstance(mContext,
mHandler);
Constructor wmxSrvConst = wimaxServiceClass.getDeclaredConstructor
(new Class[] {Context.class, wimaxStateTrackerClass});
wmxSrvConst.setAccessible(true);
IBinder svcInvoker = (IBinder)wmxSrvConst.newInstance(mContext, wimaxStateTracker);
wmxSrvConst.setAccessible(false);
ServiceManager.addService(WimaxManagerConstants.WIMAX_SERVICE, svcInvoker);
} catch(Exception ex) {
loge("Exception creating Wimax classes: " + ex.toString());
return null;
}
} else {
loge("Wimax is not enabled or not added to the network attributes!!! ");
return null;
}
return wimaxStateTracker;
}
/**
* Sets the preferred network.
* @param preference the new preference
*/
public void setNetworkPreference(int preference) {
enforceChangePermission();
mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_NETWORK_PREFERENCE, preference, 0));
}
public int getNetworkPreference() {
enforceAccessPermission();
int preference;
synchronized(this) {
preference = mNetworkPreference;
}
return preference;
}
private void handleSetNetworkPreference(int preference) {
if (ConnectivityManager.isNetworkTypeValid(preference) &&
mNetConfigs[preference] != null &&
mNetConfigs[preference].isDefault()) {
if (mNetworkPreference != preference) {
final ContentResolver cr = mContext.getContentResolver();
Settings.Secure.putInt(cr, Settings.Secure.NETWORK_PREFERENCE, preference);
synchronized(this) {
mNetworkPreference = preference;
}
enforcePreference();
}
}
}
private int getConnectivityChangeDelay() {
final ContentResolver cr = mContext.getContentResolver();
/** Check system properties for the default value then use secure settings value, if any. */
int defaultDelay = SystemProperties.getInt(
"conn." + Settings.Secure.CONNECTIVITY_CHANGE_DELAY,
Settings.Secure.CONNECTIVITY_CHANGE_DELAY_DEFAULT);
return Settings.Secure.getInt(cr, Settings.Secure.CONNECTIVITY_CHANGE_DELAY,
defaultDelay);
}
private int getPersistedNetworkPreference() {
final ContentResolver cr = mContext.getContentResolver();
final int networkPrefSetting = Settings.Secure
.getInt(cr, Settings.Secure.NETWORK_PREFERENCE, -1);
if (networkPrefSetting != -1) {
return networkPrefSetting;
}
return ConnectivityManager.DEFAULT_NETWORK_PREFERENCE;
}
/**
* Make the state of network connectivity conform to the preference settings
* In this method, we only tear down a non-preferred network. Establishing
* a connection to the preferred network is taken care of when we handle
* the disconnect event from the non-preferred network
* (see {@link #handleDisconnect(NetworkInfo)}).
*/
private void enforcePreference() {
if (mNetTrackers[mNetworkPreference].getNetworkInfo().isConnected())
return;
if (!mNetTrackers[mNetworkPreference].isAvailable())
return;
for (int t=0; t <= ConnectivityManager.MAX_RADIO_TYPE; t++) {
if (t != mNetworkPreference && mNetTrackers[t] != null &&
mNetTrackers[t].getNetworkInfo().isConnected()) {
if (DBG) {
log("tearing down " + mNetTrackers[t].getNetworkInfo() +
" in enforcePreference");
}
teardown(mNetTrackers[t]);
}
}
}
private boolean teardown(NetworkStateTracker netTracker) {
if (netTracker.teardown()) {
netTracker.setTeardownRequested(true);
return true;
} else {
return false;
}
}
/**
* Check if UID should be blocked from using the network represented by the
* given {@link NetworkStateTracker}.
*/
private boolean isNetworkBlocked(NetworkStateTracker tracker, int uid) {
final String iface = tracker.getLinkProperties().getInterfaceName();
final boolean networkCostly;
final int uidRules;
synchronized (mRulesLock) {
networkCostly = mMeteredIfaces.contains(iface);
uidRules = mUidRules.get(uid, RULE_ALLOW_ALL);
}
if (networkCostly && (uidRules & RULE_REJECT_METERED) != 0) {
return true;
}
// no restrictive rules; network is visible
return false;
}
/**
* Return a filtered {@link NetworkInfo}, potentially marked
* {@link DetailedState#BLOCKED} based on
* {@link #isNetworkBlocked(NetworkStateTracker, int)}.
*/
private NetworkInfo getFilteredNetworkInfo(NetworkStateTracker tracker, int uid) {
NetworkInfo info = tracker.getNetworkInfo();
if (isNetworkBlocked(tracker, uid)) {
// network is blocked; clone and override state
info = new NetworkInfo(info);
info.setDetailedState(DetailedState.BLOCKED, null, null);
}
return info;
}
/**
* Return NetworkInfo for the active (i.e., connected) network interface.
* It is assumed that at most one network is active at a time. If more
* than one is active, it is indeterminate which will be returned.
* @return the info for the active network, or {@code null} if none is
* active
*/
@Override
public NetworkInfo getActiveNetworkInfo() {
enforceAccessPermission();
final int uid = Binder.getCallingUid();
return getNetworkInfo(mActiveDefaultNetwork, uid);
}
@Override
public NetworkInfo getActiveNetworkInfoForUid(int uid) {
enforceConnectivityInternalPermission();
return getNetworkInfo(mActiveDefaultNetwork, uid);
}
@Override
public NetworkInfo getNetworkInfo(int networkType) {
enforceAccessPermission();
final int uid = Binder.getCallingUid();
return getNetworkInfo(networkType, uid);
}
private NetworkInfo getNetworkInfo(int networkType, int uid) {
NetworkInfo info = null;
if (isNetworkTypeValid(networkType)) {
final NetworkStateTracker tracker = mNetTrackers[networkType];
if (tracker != null) {
info = getFilteredNetworkInfo(tracker, uid);
}
}
return info;
}
@Override
public NetworkInfo[] getAllNetworkInfo() {
enforceAccessPermission();
final int uid = Binder.getCallingUid();
final ArrayList<NetworkInfo> result = Lists.newArrayList();
synchronized (mRulesLock) {
for (NetworkStateTracker tracker : mNetTrackers) {
if (tracker != null) {
result.add(getFilteredNetworkInfo(tracker, uid));
}
}
}
return result.toArray(new NetworkInfo[result.size()]);
}
@Override
public boolean isNetworkSupported(int networkType) {
enforceAccessPermission();
return (isNetworkTypeValid(networkType) && (mNetTrackers[networkType] != null));
}
/**
* Return LinkProperties for the active (i.e., connected) default
* network interface. It is assumed that at most one default network
* is active at a time. If more than one is active, it is indeterminate
* which will be returned.
* @return the ip properties for the active network, or {@code null} if
* none is active
*/
@Override
public LinkProperties getActiveLinkProperties() {
return getLinkProperties(mActiveDefaultNetwork);
}
@Override
public LinkProperties getLinkProperties(int networkType) {
enforceAccessPermission();
if (isNetworkTypeValid(networkType)) {
final NetworkStateTracker tracker = mNetTrackers[networkType];
if (tracker != null) {
return tracker.getLinkProperties();
}
}
return null;
}
@Override
public NetworkState[] getAllNetworkState() {
enforceAccessPermission();
final int uid = Binder.getCallingUid();
final ArrayList<NetworkState> result = Lists.newArrayList();
synchronized (mRulesLock) {
for (NetworkStateTracker tracker : mNetTrackers) {
if (tracker != null) {
final NetworkInfo info = getFilteredNetworkInfo(tracker, uid);
result.add(new NetworkState(
info, tracker.getLinkProperties(), tracker.getLinkCapabilities()));
}
}
}
return result.toArray(new NetworkState[result.size()]);
}
private NetworkState getNetworkStateUnchecked(int networkType) {
if (isNetworkTypeValid(networkType)) {
final NetworkStateTracker tracker = mNetTrackers[networkType];
if (tracker != null) {
return new NetworkState(tracker.getNetworkInfo(), tracker.getLinkProperties(),
tracker.getLinkCapabilities());
}
}
return null;
}
@Override
public NetworkQuotaInfo getActiveNetworkQuotaInfo() {
enforceAccessPermission();
final NetworkState state = getNetworkStateUnchecked(mActiveDefaultNetwork);
if (state != null) {
try {
return mPolicyManager.getNetworkQuotaInfo(state);
} catch (RemoteException e) {
}
}
return null;
}
public boolean setRadios(boolean turnOn) {
boolean result = true;
enforceChangePermission();
for (NetworkStateTracker t : mNetTrackers) {
if (t != null) result = t.setRadio(turnOn) && result;
}
return result;
}
public boolean setRadio(int netType, boolean turnOn) {
enforceChangePermission();
if (!ConnectivityManager.isNetworkTypeValid(netType)) {
return false;
}
NetworkStateTracker tracker = mNetTrackers[netType];
return tracker != null && tracker.setRadio(turnOn);
}
/**
* Used to notice when the calling process dies so we can self-expire
*
* Also used to know if the process has cleaned up after itself when
* our auto-expire timer goes off. The timer has a link to an object.
*
*/
private class FeatureUser implements IBinder.DeathRecipient {
int mNetworkType;
String mFeature;
IBinder mBinder;
int mPid;
int mUid;
long mCreateTime;
FeatureUser(int type, String feature, IBinder binder) {
super();
mNetworkType = type;
mFeature = feature;
mBinder = binder;
mPid = getCallingPid();
mUid = getCallingUid();
mCreateTime = System.currentTimeMillis();
try {
mBinder.linkToDeath(this, 0);
} catch (RemoteException e) {
binderDied();
}
}
void unlinkDeathRecipient() {
mBinder.unlinkToDeath(this, 0);
}
public void binderDied() {
log("ConnectivityService FeatureUser binderDied(" +
mNetworkType + ", " + mFeature + ", " + mBinder + "), created " +
(System.currentTimeMillis() - mCreateTime) + " mSec ago");
stopUsingNetworkFeature(this, false);
}
public void expire() {
if (VDBG) {
log("ConnectivityService FeatureUser expire(" +
mNetworkType + ", " + mFeature + ", " + mBinder +"), created " +
(System.currentTimeMillis() - mCreateTime) + " mSec ago");
}
stopUsingNetworkFeature(this, false);
}
public boolean isSameUser(FeatureUser u) {
if (u == null) return false;
return isSameUser(u.mPid, u.mUid, u.mNetworkType, u.mFeature);
}
public boolean isSameUser(int pid, int uid, int networkType, String feature) {
if ((mPid == pid) && (mUid == uid) && (mNetworkType == networkType) &&
TextUtils.equals(mFeature, feature)) {
return true;
}
return false;
}
public String toString() {
return "FeatureUser("+mNetworkType+","+mFeature+","+mPid+","+mUid+"), created " +
(System.currentTimeMillis() - mCreateTime) + " mSec ago";
}
}
// javadoc from interface
public int startUsingNetworkFeature(int networkType, String feature,
IBinder binder) {
if (VDBG) {
log("startUsingNetworkFeature for net " + networkType + ": " + feature);
}
enforceChangePermission();
if (!ConnectivityManager.isNetworkTypeValid(networkType) ||
mNetConfigs[networkType] == null) {
return Phone.APN_REQUEST_FAILED;
}
FeatureUser f = new FeatureUser(networkType, feature, binder);
// TODO - move this into individual networktrackers
int usedNetworkType = convertFeatureToNetworkType(networkType, feature);
if (mProtectedNetworks.contains(usedNetworkType)) {
enforceConnectivityInternalPermission();
}
NetworkStateTracker network = mNetTrackers[usedNetworkType];
if (network != null) {
Integer currentPid = new Integer(getCallingPid());
if (usedNetworkType != networkType) {
NetworkInfo ni = network.getNetworkInfo();
if (ni.isAvailable() == false) {
if (DBG) log("special network not available");
if (!TextUtils.equals(feature,Phone.FEATURE_ENABLE_DUN_ALWAYS)) {
return Phone.APN_TYPE_NOT_AVAILABLE;
} else {
// else make the attempt anyway - probably giving REQUEST_STARTED below
}
}
int restoreTimer = getRestoreDefaultNetworkDelay(usedNetworkType);
synchronized(this) {
boolean addToList = true;
if (restoreTimer < 0) {
// In case there is no timer is specified for the feature,
// make sure we don't add duplicate entry with the same request.
for (FeatureUser u : mFeatureUsers) {
if (u.isSameUser(f)) {
// Duplicate user is found. Do not add.
addToList = false;
break;
}
}
}
if (addToList) mFeatureUsers.add(f);
if (!mNetRequestersPids[usedNetworkType].contains(currentPid)) {
// this gets used for per-pid dns when connected
mNetRequestersPids[usedNetworkType].add(currentPid);
}
}
if (restoreTimer >= 0) {
mHandler.sendMessageDelayed(
mHandler.obtainMessage(EVENT_RESTORE_DEFAULT_NETWORK, f), restoreTimer);
}
if ((ni.isConnectedOrConnecting() == true) &&
!network.isTeardownRequested()) {
if (ni.isConnected() == true) {
final long token = Binder.clearCallingIdentity();
try {
// add the pid-specific dns
handleDnsConfigurationChange(usedNetworkType);
if (VDBG) log("special network already active");
} finally {
Binder.restoreCallingIdentity(token);
}
return Phone.APN_ALREADY_ACTIVE;
}
if (VDBG) log("special network already connecting");
return Phone.APN_REQUEST_STARTED;
}
// check if the radio in play can make another contact
// assume if cannot for now
if (DBG) {
log("startUsingNetworkFeature reconnecting to " + networkType + ": " + feature);
}
network.reconnect();
return Phone.APN_REQUEST_STARTED;
} else {
// need to remember this unsupported request so we respond appropriately on stop
synchronized(this) {
mFeatureUsers.add(f);
if (!mNetRequestersPids[usedNetworkType].contains(currentPid)) {
// this gets used for per-pid dns when connected
mNetRequestersPids[usedNetworkType].add(currentPid);
}
}
return -1;
}
}
return Phone.APN_TYPE_NOT_AVAILABLE;
}
// javadoc from interface
public int stopUsingNetworkFeature(int networkType, String feature) {
enforceChangePermission();
int pid = getCallingPid();
int uid = getCallingUid();
FeatureUser u = null;
boolean found = false;
synchronized(this) {
for (FeatureUser x : mFeatureUsers) {
if (x.isSameUser(pid, uid, networkType, feature)) {
u = x;
found = true;
break;
}
}
}
if (found && u != null) {
// stop regardless of how many other time this proc had called start
return stopUsingNetworkFeature(u, true);
} else {
// none found!
if (VDBG) log("stopUsingNetworkFeature - not a live request, ignoring");
return 1;
}
}
private int stopUsingNetworkFeature(FeatureUser u, boolean ignoreDups) {
int networkType = u.mNetworkType;
String feature = u.mFeature;
int pid = u.mPid;
int uid = u.mUid;
NetworkStateTracker tracker = null;
boolean callTeardown = false; // used to carry our decision outside of sync block
if (VDBG) {
log("stopUsingNetworkFeature: net " + networkType + ": " + feature);
}
if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
if (DBG) {
log("stopUsingNetworkFeature: net " + networkType + ": " + feature +
", net is invalid");
}
return -1;
}
// need to link the mFeatureUsers list with the mNetRequestersPids state in this
// sync block
synchronized(this) {
// check if this process still has an outstanding start request
if (!mFeatureUsers.contains(u)) {
if (VDBG) {
log("stopUsingNetworkFeature: this process has no outstanding requests" +
", ignoring");
}
return 1;
}
u.unlinkDeathRecipient();
mFeatureUsers.remove(mFeatureUsers.indexOf(u));
// If we care about duplicate requests, check for that here.
//
// This is done to support the extension of a request - the app
// can request we start the network feature again and renew the
// auto-shutoff delay. Normal "stop" calls from the app though
// do not pay attention to duplicate requests - in effect the
// API does not refcount and a single stop will counter multiple starts.
if (ignoreDups == false) {
for (FeatureUser x : mFeatureUsers) {
if (x.isSameUser(u)) {
if (VDBG) log("stopUsingNetworkFeature: dup is found, ignoring");
return 1;
}
}
}
// TODO - move to individual network trackers
int usedNetworkType = convertFeatureToNetworkType(networkType, feature);
tracker = mNetTrackers[usedNetworkType];
if (tracker == null) {
if (DBG) {
log("stopUsingNetworkFeature: net " + networkType + ": " + feature +
" no known tracker for used net type " + usedNetworkType);
}
return -1;
}
if (usedNetworkType != networkType) {
Integer currentPid = new Integer(pid);
mNetRequestersPids[usedNetworkType].remove(currentPid);
reassessPidDns(pid, true);
if (mNetRequestersPids[usedNetworkType].size() != 0) {
if (VDBG) {
log("stopUsingNetworkFeature: net " + networkType + ": " + feature +
" others still using it");
}
return 1;
}
callTeardown = true;
} else {
if (DBG) {
log("stopUsingNetworkFeature: net " + networkType + ": " + feature +
" not a known feature - dropping");
}
}
}
if (callTeardown) {
if (DBG) {
log("stopUsingNetworkFeature: teardown net " + networkType + ": " + feature);
}
tracker.teardown();
return 1;
} else {
return -1;
}
}
/**
* @deprecated use requestRouteToHostAddress instead
*
* Ensure that a network route exists to deliver traffic to the specified
* host via the specified network interface.
* @param networkType the type of the network over which traffic to the
* specified host is to be routed
* @param hostAddress the IP address of the host to which the route is
* desired
* @return {@code true} on success, {@code false} on failure
*/
public boolean requestRouteToHost(int networkType, int hostAddress) {
InetAddress inetAddress = NetworkUtils.intToInetAddress(hostAddress);
if (inetAddress == null) {
return false;
}
return requestRouteToHostAddress(networkType, inetAddress.getAddress());
}
/**
* Ensure that a network route exists to deliver traffic to the specified
* host via the specified network interface.
* @param networkType the type of the network over which traffic to the
* specified host is to be routed
* @param hostAddress the IP address of the host to which the route is
* desired
* @return {@code true} on success, {@code false} on failure
*/
public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) {
enforceChangePermission();
if (mProtectedNetworks.contains(networkType)) {
enforceConnectivityInternalPermission();
}
if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType);
return false;
}
NetworkStateTracker tracker = mNetTrackers[networkType];
if (tracker == null || !tracker.getNetworkInfo().isConnected() ||
tracker.isTeardownRequested()) {
if (VDBG) {
log("requestRouteToHostAddress on down network " +
"(" + networkType + ") - dropped");
}
return false;
}
final long token = Binder.clearCallingIdentity();
try {
InetAddress addr = InetAddress.getByAddress(hostAddress);
LinkProperties lp = tracker.getLinkProperties();
return addRouteToAddress(lp, addr);
} catch (UnknownHostException e) {
if (DBG) log("requestRouteToHostAddress got " + e.toString());
} finally {
Binder.restoreCallingIdentity(token);
}
return false;
}
private boolean addRoute(LinkProperties p, RouteInfo r, boolean toDefaultTable) {
return modifyRoute(p.getInterfaceName(), p, r, 0, ADD, toDefaultTable);
}
private boolean removeRoute(LinkProperties p, RouteInfo r, boolean toDefaultTable) {
return modifyRoute(p.getInterfaceName(), p, r, 0, REMOVE, toDefaultTable);
}
private boolean addRouteToAddress(LinkProperties lp, InetAddress addr) {
return modifyRouteToAddress(lp, addr, ADD, TO_DEFAULT_TABLE);
}
private boolean removeRouteToAddress(LinkProperties lp, InetAddress addr) {
return modifyRouteToAddress(lp, addr, REMOVE, TO_DEFAULT_TABLE);
}
private boolean modifyRouteToAddress(LinkProperties lp, InetAddress addr, boolean doAdd,
boolean toDefaultTable) {
RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getRoutes(), addr);
if (bestRoute == null) {
bestRoute = RouteInfo.makeHostRoute(addr);
} else {
if (bestRoute.getGateway().equals(addr)) {
// if there is no better route, add the implied hostroute for our gateway
bestRoute = RouteInfo.makeHostRoute(addr);
} else {
// if we will connect to this through another route, add a direct route
// to it's gateway
bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway());
}
}
return modifyRoute(lp.getInterfaceName(), lp, bestRoute, 0, doAdd, toDefaultTable);
}
private boolean modifyRoute(String ifaceName, LinkProperties lp, RouteInfo r, int cycleCount,
boolean doAdd, boolean toDefaultTable) {
if ((ifaceName == null) || (lp == null) || (r == null)) {
if (DBG) log("modifyRoute got unexpected null: " + ifaceName + ", " + lp + ", " + r);
return false;
}
if (cycleCount > MAX_HOSTROUTE_CYCLE_COUNT) {
loge("Error modifying route - too much recursion");
return false;
}
if (r.isHostRoute() == false) {
RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getRoutes(), r.getGateway());
if (bestRoute != null) {
if (bestRoute.getGateway().equals(r.getGateway())) {
// if there is no better route, add the implied hostroute for our gateway
bestRoute = RouteInfo.makeHostRoute(r.getGateway());
} else {
// if we will connect to our gateway through another route, add a direct
// route to it's gateway
bestRoute = RouteInfo.makeHostRoute(r.getGateway(), bestRoute.getGateway());
}
modifyRoute(ifaceName, lp, bestRoute, cycleCount+1, doAdd, toDefaultTable);
}
}
if (doAdd) {
if (VDBG) log("Adding " + r + " for interface " + ifaceName);
try {
if (toDefaultTable) {
mAddedRoutes.add(r); // only track default table - only one apps can effect
mNetd.addRoute(ifaceName, r);
} else {
mNetd.addSecondaryRoute(ifaceName, r);
}
} catch (Exception e) {
// never crash - catch them all
if (DBG) loge("Exception trying to add a route: " + e);
return false;
}
} else {
// if we remove this one and there are no more like it, then refcount==0 and
// we can remove it from the table
if (toDefaultTable) {
mAddedRoutes.remove(r);
if (mAddedRoutes.contains(r) == false) {
if (VDBG) log("Removing " + r + " for interface " + ifaceName);
try {
mNetd.removeRoute(ifaceName, r);
} catch (Exception e) {
// never crash - catch them all
if (DBG) loge("Exception trying to remove a route: " + e);
return false;
}
} else {
if (VDBG) log("not removing " + r + " as it's still in use");
}
} else {
if (VDBG) log("Removing " + r + " for interface " + ifaceName);
try {
mNetd.removeSecondaryRoute(ifaceName, r);
} catch (Exception e) {
// never crash - catch them all
if (DBG) loge("Exception trying to remove a route: " + e);
return false;
}
}
}
return true;
}
/**
* @see ConnectivityManager#getMobileDataEnabled()
*/
public boolean getMobileDataEnabled() {
// TODO: This detail should probably be in DataConnectionTracker's
// which is where we store the value and maybe make this
// asynchronous.
enforceAccessPermission();
boolean retVal = Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.MOBILE_DATA, 1) == 1;
if (VDBG) log("getMobileDataEnabled returning " + retVal);
return retVal;
}
public void setDataDependency(int networkType, boolean met) {
enforceConnectivityInternalPermission();
mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_DEPENDENCY_MET,
(met ? ENABLED : DISABLED), networkType));
}
private void handleSetDependencyMet(int networkType, boolean met) {
if (mNetTrackers[networkType] != null) {
if (DBG) {
log("handleSetDependencyMet(" + networkType + ", " + met + ")");
}
mNetTrackers[networkType].setDependencyMet(met);
}
}
private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() {
@Override
public void onUidRulesChanged(int uid, int uidRules) {
// only someone like NPMS should only be calling us
mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG);
if (LOGD_RULES) {
log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")");
}
synchronized (mRulesLock) {
// skip update when we've already applied rules
final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL);
if (oldRules == uidRules) return;
mUidRules.put(uid, uidRules);
}
// TODO: dispatch into NMS to push rules towards kernel module
// TODO: notify UID when it has requested targeted updates
}
@Override
public void onMeteredIfacesChanged(String[] meteredIfaces) {
// only someone like NPMS should only be calling us
mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG);
if (LOGD_RULES) {
log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")");
}
synchronized (mRulesLock) {
mMeteredIfaces.clear();
for (String iface : meteredIfaces) {
mMeteredIfaces.add(iface);
}
}
}
};
/**
* @see ConnectivityManager#setMobileDataEnabled(boolean)
*/
public void setMobileDataEnabled(boolean enabled) {
enforceChangePermission();
if (DBG) log("setMobileDataEnabled(" + enabled + ")");
mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_MOBILE_DATA,
(enabled ? ENABLED : DISABLED), 0));
}
private void handleSetMobileData(boolean enabled) {
if (mNetTrackers[ConnectivityManager.TYPE_MOBILE] != null) {
if (VDBG) {
log(mNetTrackers[ConnectivityManager.TYPE_MOBILE].toString() + enabled);
}
mNetTrackers[ConnectivityManager.TYPE_MOBILE].setUserDataEnable(enabled);
}
if (mNetTrackers[ConnectivityManager.TYPE_WIMAX] != null) {
if (VDBG) {
log(mNetTrackers[ConnectivityManager.TYPE_WIMAX].toString() + enabled);
}
mNetTrackers[ConnectivityManager.TYPE_WIMAX].setUserDataEnable(enabled);
}
}
@Override
public void setPolicyDataEnable(int networkType, boolean enabled) {
// only someone like NPMS should only be calling us
mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG);
mHandler.sendMessage(mHandler.obtainMessage(
EVENT_SET_POLICY_DATA_ENABLE, networkType, (enabled ? ENABLED : DISABLED)));
}
private void handleSetPolicyDataEnable(int networkType, boolean enabled) {
if (isNetworkTypeValid(networkType)) {
final NetworkStateTracker tracker = mNetTrackers[networkType];
if (tracker != null) {
tracker.setPolicyDataEnable(enabled);
}
}
}
private void enforceAccessPermission() {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.ACCESS_NETWORK_STATE,
"ConnectivityService");
}
private void enforceChangePermission() {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.CHANGE_NETWORK_STATE,
"ConnectivityService");
}
// TODO Make this a special check when it goes public
private void enforceTetherChangePermission() {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.CHANGE_NETWORK_STATE,
"ConnectivityService");
}
private void enforceTetherAccessPermission() {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.ACCESS_NETWORK_STATE,
"ConnectivityService");
}
private void enforceConnectivityInternalPermission() {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.CONNECTIVITY_INTERNAL,
"ConnectivityService");
}
/**
* Handle a {@code DISCONNECTED} event. If this pertains to the non-active
* network, we ignore it. If it is for the active network, we send out a
* broadcast. But first, we check whether it might be possible to connect
* to a different network.
* @param info the {@code NetworkInfo} for the network
*/
private void handleDisconnect(NetworkInfo info) {
int prevNetType = info.getType();
mNetTrackers[prevNetType].setTeardownRequested(false);
/*
* If the disconnected network is not the active one, then don't report
* this as a loss of connectivity. What probably happened is that we're
* getting the disconnect for a network that we explicitly disabled
* in accordance with network preference policies.
*/
if (!mNetConfigs[prevNetType].isDefault()) {
List pids = mNetRequestersPids[prevNetType];
for (int i = 0; i<pids.size(); i++) {
Integer pid = (Integer)pids.get(i);
// will remove them because the net's no longer connected
// need to do this now as only now do we know the pids and
// can properly null things that are no longer referenced.
reassessPidDns(pid.intValue(), false);
}
}
Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
if (info.isFailover()) {
intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
info.setFailover(false);
}
if (info.getReason() != null) {
intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
}
if (info.getExtraInfo() != null) {
intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,
info.getExtraInfo());
}
if (mNetConfigs[prevNetType].isDefault()) {
tryFailover(prevNetType);
if (mActiveDefaultNetwork != -1) {
NetworkInfo switchTo = mNetTrackers[mActiveDefaultNetwork].getNetworkInfo();
intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, switchTo);
} else {
mDefaultInetConditionPublished = 0; // we're not connected anymore
intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
}
}
intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
// Reset interface if no other connections are using the same interface
boolean doReset = true;
LinkProperties linkProperties = mNetTrackers[prevNetType].getLinkProperties();
if (linkProperties != null) {
String oldIface = linkProperties.getInterfaceName();
if (TextUtils.isEmpty(oldIface) == false) {
for (NetworkStateTracker networkStateTracker : mNetTrackers) {
if (networkStateTracker == null) continue;
NetworkInfo networkInfo = networkStateTracker.getNetworkInfo();
if (networkInfo.isConnected() && networkInfo.getType() != prevNetType) {
LinkProperties l = networkStateTracker.getLinkProperties();
if (l == null) continue;
if (oldIface.equals(l.getInterfaceName())) {
doReset = false;
break;
}
}
}
}
}
// do this before we broadcast the change
handleConnectivityChange(prevNetType, doReset);
final Intent immediateIntent = new Intent(intent);
immediateIntent.setAction(CONNECTIVITY_ACTION_IMMEDIATE);
sendStickyBroadcast(immediateIntent);
sendStickyBroadcastDelayed(intent, getConnectivityChangeDelay());
/*
* If the failover network is already connected, then immediately send
* out a followup broadcast indicating successful failover
*/
if (mActiveDefaultNetwork != -1) {
sendConnectedBroadcastDelayed(mNetTrackers[mActiveDefaultNetwork].getNetworkInfo(),
getConnectivityChangeDelay());
}
}
private void tryFailover(int prevNetType) {
/*
* If this is a default network, check if other defaults are available.
* Try to reconnect on all available and let them hash it out when
* more than one connects.
*/
if (mNetConfigs[prevNetType].isDefault()) {
if (mActiveDefaultNetwork == prevNetType) {
mActiveDefaultNetwork = -1;
}
// don't signal a reconnect for anything lower or equal priority than our
// current connected default
// TODO - don't filter by priority now - nice optimization but risky
// int currentPriority = -1;
// if (mActiveDefaultNetwork != -1) {
// currentPriority = mNetConfigs[mActiveDefaultNetwork].mPriority;
// }
for (int checkType=0; checkType <= ConnectivityManager.MAX_NETWORK_TYPE; checkType++) {
if (checkType == prevNetType) continue;
if (mNetConfigs[checkType] == null) continue;
if (!mNetConfigs[checkType].isDefault()) continue;
if (mNetTrackers[checkType] == null) continue;
// Enabling the isAvailable() optimization caused mobile to not get
// selected if it was in the middle of error handling. Specifically
// a moble connection that took 30 seconds to complete the DEACTIVATE_DATA_CALL
// would not be available and we wouldn't get connected to anything.
// So removing the isAvailable() optimization below for now. TODO: This
// optimization should work and we need to investigate why it doesn't work.
// This could be related to how DEACTIVATE_DATA_CALL is reporting its
// complete before it is really complete.
// if (!mNetTrackers[checkType].isAvailable()) continue;
// if (currentPriority >= mNetConfigs[checkType].mPriority) continue;
NetworkStateTracker checkTracker = mNetTrackers[checkType];
NetworkInfo checkInfo = checkTracker.getNetworkInfo();
if (!checkInfo.isConnectedOrConnecting() || checkTracker.isTeardownRequested()) {
checkInfo.setFailover(true);
checkTracker.reconnect();
}
if (DBG) log("Attempting to switch to " + checkInfo.getTypeName());
}
}
}
private void sendConnectedBroadcast(NetworkInfo info) {
sendGeneralBroadcast(info, CONNECTIVITY_ACTION_IMMEDIATE);
sendGeneralBroadcast(info, CONNECTIVITY_ACTION);
}
private void sendConnectedBroadcastDelayed(NetworkInfo info, int delayMs) {
sendGeneralBroadcast(info, CONNECTIVITY_ACTION_IMMEDIATE);
sendGeneralBroadcastDelayed(info, CONNECTIVITY_ACTION, delayMs);
}
private void sendInetConditionBroadcast(NetworkInfo info) {
sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION);
}
private Intent makeGeneralIntent(NetworkInfo info, String bcastType) {
Intent intent = new Intent(bcastType);
intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
if (info.isFailover()) {
intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
info.setFailover(false);
}
if (info.getReason() != null) {
intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
}
if (info.getExtraInfo() != null) {
intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,
info.getExtraInfo());
}
intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
return intent;
}
private void sendGeneralBroadcast(NetworkInfo info, String bcastType) {
sendStickyBroadcast(makeGeneralIntent(info, bcastType));
}
private void sendGeneralBroadcastDelayed(NetworkInfo info, String bcastType, int delayMs) {
sendStickyBroadcastDelayed(makeGeneralIntent(info, bcastType), delayMs);
}
/**
* Called when an attempt to fail over to another network has failed.
* @param info the {@link NetworkInfo} for the failed network
*/
private void handleConnectionFailure(NetworkInfo info) {
mNetTrackers[info.getType()].setTeardownRequested(false);
String reason = info.getReason();
String extraInfo = info.getExtraInfo();
String reasonText;
if (reason == null) {
reasonText = ".";
} else {
reasonText = " (" + reason + ").";
}
loge("Attempt to connect to " + info.getTypeName() + " failed" + reasonText);
Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
if (getActiveNetworkInfo() == null) {
intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
}
if (reason != null) {
intent.putExtra(ConnectivityManager.EXTRA_REASON, reason);
}
if (extraInfo != null) {
intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, extraInfo);
}
if (info.isFailover()) {
intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
info.setFailover(false);
}
if (mNetConfigs[info.getType()].isDefault()) {
tryFailover(info.getType());
if (mActiveDefaultNetwork != -1) {
NetworkInfo switchTo = mNetTrackers[mActiveDefaultNetwork].getNetworkInfo();
intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, switchTo);
} else {
mDefaultInetConditionPublished = 0;
intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
}
}
intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
final Intent immediateIntent = new Intent(intent);
immediateIntent.setAction(CONNECTIVITY_ACTION_IMMEDIATE);
sendStickyBroadcast(immediateIntent);
sendStickyBroadcast(intent);
/*
* If the failover network is already connected, then immediately send
* out a followup broadcast indicating successful failover
*/
if (mActiveDefaultNetwork != -1) {
sendConnectedBroadcast(mNetTrackers[mActiveDefaultNetwork].getNetworkInfo());
}
}
private void sendStickyBroadcast(Intent intent) {
synchronized(this) {
if (!mSystemReady) {
mInitialBroadcast = new Intent(intent);
}
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
if (VDBG) {
log("sendStickyBroadcast: action=" + intent.getAction());
}
mContext.sendStickyBroadcast(intent);
}
}
private void sendStickyBroadcastDelayed(Intent intent, int delayMs) {
if (delayMs <= 0) {
sendStickyBroadcast(intent);
} else {
if (VDBG) {
log("sendStickyBroadcastDelayed: delayMs=" + delayMs + ", action="
+ intent.getAction());
}
mHandler.sendMessageDelayed(mHandler.obtainMessage(
EVENT_SEND_STICKY_BROADCAST_INTENT, intent), delayMs);
}
}
void systemReady() {
synchronized(this) {
mSystemReady = true;
if (mInitialBroadcast != null) {
mContext.sendStickyBroadcast(mInitialBroadcast);
mInitialBroadcast = null;
}
}
// load the global proxy at startup
mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY));
}
private void handleConnect(NetworkInfo info) {
final int type = info.getType();
// snapshot isFailover, because sendConnectedBroadcast() resets it
boolean isFailover = info.isFailover();
final NetworkStateTracker thisNet = mNetTrackers[type];
// if this is a default net and other default is running
// kill the one not preferred
if (mNetConfigs[type].isDefault()) {
if (mActiveDefaultNetwork != -1 && mActiveDefaultNetwork != type) {
if ((type != mNetworkPreference &&
mNetConfigs[mActiveDefaultNetwork].priority >
mNetConfigs[type].priority) ||
mNetworkPreference == mActiveDefaultNetwork) {
// don't accept this one
if (VDBG) {
log("Not broadcasting CONNECT_ACTION " +
"to torn down network " + info.getTypeName());
}
teardown(thisNet);
return;
} else {
// tear down the other
NetworkStateTracker otherNet =
mNetTrackers[mActiveDefaultNetwork];
if (DBG) {
log("Policy requires " + otherNet.getNetworkInfo().getTypeName() +
" teardown");
}
if (!teardown(otherNet)) {
loge("Network declined teardown request");
teardown(thisNet);
return;
}
}
}
synchronized (ConnectivityService.this) {
// have a new default network, release the transition wakelock in a second
// if it's held. The second pause is to allow apps to reconnect over the
// new network
if (mNetTransitionWakeLock.isHeld()) {
mHandler.sendMessageDelayed(mHandler.obtainMessage(
EVENT_CLEAR_NET_TRANSITION_WAKELOCK,
mNetTransitionWakeLockSerialNumber, 0),
1000);
}
}
mActiveDefaultNetwork = type;
// this will cause us to come up initially as unconnected and switching
// to connected after our normal pause unless somebody reports us as reall
// disconnected
mDefaultInetConditionPublished = 0;
mDefaultConnectionSequence++;
mInetConditionChangeInFlight = false;
// Don't do this - if we never sign in stay, grey
//reportNetworkCondition(mActiveDefaultNetwork, 100);
}
thisNet.setTeardownRequested(false);
updateNetworkSettings(thisNet);
handleConnectivityChange(type, false);
sendConnectedBroadcastDelayed(info, getConnectivityChangeDelay());
// notify battery stats service about this network
final String iface = thisNet.getLinkProperties().getInterfaceName();
if (iface != null) {
try {
BatteryStatsService.getService().noteNetworkInterfaceType(iface, type);
} catch (RemoteException e) {
// ignored; service lives in system_server
}
}
}
/**
* After a change in the connectivity state of a network. We're mainly
* concerned with making sure that the list of DNS servers is set up
* according to which networks are connected, and ensuring that the
* right routing table entries exist.
*/
private void handleConnectivityChange(int netType, boolean doReset) {
int resetMask = doReset ? NetworkUtils.RESET_ALL_ADDRESSES : 0;
/*
* If a non-default network is enabled, add the host routes that
* will allow it's DNS servers to be accessed.
*/
handleDnsConfigurationChange(netType);
LinkProperties curLp = mCurrentLinkProperties[netType];
LinkProperties newLp = null;
if (mNetTrackers[netType].getNetworkInfo().isConnected()) {
newLp = mNetTrackers[netType].getLinkProperties();
if (VDBG) {
log("handleConnectivityChange: changed linkProperty[" + netType + "]:" +
" doReset=" + doReset + " resetMask=" + resetMask +
"\n curLp=" + curLp +
"\n newLp=" + newLp);
}
if (curLp != null) {
if (curLp.isIdenticalInterfaceName(newLp)) {
CompareResult<LinkAddress> car = curLp.compareAddresses(newLp);
if ((car.removed.size() != 0) || (car.added.size() != 0)) {
for (LinkAddress linkAddr : car.removed) {
if (linkAddr.getAddress() instanceof Inet4Address) {
resetMask |= NetworkUtils.RESET_IPV4_ADDRESSES;
}
if (linkAddr.getAddress() instanceof Inet6Address) {
resetMask |= NetworkUtils.RESET_IPV6_ADDRESSES;
}
}
if (DBG) {
log("handleConnectivityChange: addresses changed" +
" linkProperty[" + netType + "]:" + " resetMask=" + resetMask +
"\n car=" + car);
}
} else {
if (DBG) {
log("handleConnectivityChange: address are the same reset per doReset" +
" linkProperty[" + netType + "]:" +
" resetMask=" + resetMask);
}
}
} else {
resetMask = NetworkUtils.RESET_ALL_ADDRESSES;
if (DBG) {
log("handleConnectivityChange: interface not not equivalent reset both" +
" linkProperty[" + netType + "]:" +
" resetMask=" + resetMask);
}
}
}
if (mNetConfigs[netType].isDefault()) {
handleApplyDefaultProxy(newLp.getHttpProxy());
}
} else {
if (VDBG) {
log("handleConnectivityChange: changed linkProperty[" + netType + "]:" +
" doReset=" + doReset + " resetMask=" + resetMask +
"\n curLp=" + curLp +
"\n newLp= null");
}
}
mCurrentLinkProperties[netType] = newLp;
boolean resetDns = updateRoutes(newLp, curLp, mNetConfigs[netType].isDefault());
if (resetMask != 0 || resetDns) {
LinkProperties linkProperties = mNetTrackers[netType].getLinkProperties();
if (linkProperties != null) {
String iface = linkProperties.getInterfaceName();
if (TextUtils.isEmpty(iface) == false) {
if (resetMask != 0) {
if (DBG) log("resetConnections(" + iface + ", " + resetMask + ")");
NetworkUtils.resetConnections(iface, resetMask);
// Tell VPN the interface is down. It is a temporary
// but effective fix to make VPN aware of the change.
if ((resetMask & NetworkUtils.RESET_IPV4_ADDRESSES) != 0) {
mVpn.interfaceStatusChanged(iface, false);
}
}
if (resetDns) {
if (VDBG) log("resetting DNS cache for " + iface);
try {
mNetd.flushInterfaceDnsCache(iface);
} catch (Exception e) {
// never crash - catch them all
if (DBG) loge("Exception resetting dns cache: " + e);
}
}
}
}
}
// TODO: Temporary notifying upstread change to Tethering.
// @see bug/4455071
/** Notify TetheringService if interface name has been changed. */
if (TextUtils.equals(mNetTrackers[netType].getNetworkInfo().getReason(),
Phone.REASON_LINK_PROPERTIES_CHANGED)) {
if (isTetheringSupported()) {
mTethering.handleTetherIfaceChange();
}
}
}
/**
* Add and remove routes using the old properties (null if not previously connected),
* new properties (null if becoming disconnected). May even be double null, which
* is a noop.
* Uses isLinkDefault to determine if default routes should be set or conversely if
* host routes should be set to the dns servers
* returns a boolean indicating the routes changed
*/
private boolean updateRoutes(LinkProperties newLp, LinkProperties curLp,
boolean isLinkDefault) {
Collection<RouteInfo> routesToAdd = null;
CompareResult<InetAddress> dnsDiff = new CompareResult<InetAddress>();
CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>();
if (curLp != null) {
// check for the delta between the current set and the new
routeDiff = curLp.compareRoutes(newLp);
dnsDiff = curLp.compareDnses(newLp);
} else if (newLp != null) {
routeDiff.added = newLp.getRoutes();
dnsDiff.added = newLp.getDnses();
}
boolean routesChanged = (routeDiff.removed.size() != 0 || routeDiff.added.size() != 0);
for (RouteInfo r : routeDiff.removed) {
if (isLinkDefault || ! r.isDefaultRoute()) {
removeRoute(curLp, r, TO_DEFAULT_TABLE);
}
if (isLinkDefault == false) {
// remove from a secondary route table
removeRoute(curLp, r, TO_SECONDARY_TABLE);
}
}
for (RouteInfo r : routeDiff.added) {
if (isLinkDefault || ! r.isDefaultRoute()) {
addRoute(newLp, r, TO_DEFAULT_TABLE);
} else {
// add to a secondary route table
addRoute(newLp, r, TO_SECONDARY_TABLE);
// many radios add a default route even when we don't want one.
// remove the default route unless somebody else has asked for it
String ifaceName = newLp.getInterfaceName();
if (TextUtils.isEmpty(ifaceName) == false && mAddedRoutes.contains(r) == false) {
if (VDBG) log("Removing " + r + " for interface " + ifaceName);
try {
mNetd.removeRoute(ifaceName, r);
} catch (Exception e) {
// never crash - catch them all
if (DBG) loge("Exception trying to remove a route: " + e);
}
}
}
}
if (!isLinkDefault) {
// handle DNS routes
if (routesChanged) {
// routes changed - remove all old dns entries and add new
if (curLp != null) {
for (InetAddress oldDns : curLp.getDnses()) {
removeRouteToAddress(curLp, oldDns);
}
}
if (newLp != null) {
for (InetAddress newDns : newLp.getDnses()) {
addRouteToAddress(newLp, newDns);
}
}
} else {
// no change in routes, check for change in dns themselves
for (InetAddress oldDns : dnsDiff.removed) {
removeRouteToAddress(curLp, oldDns);
}
for (InetAddress newDns : dnsDiff.added) {
addRouteToAddress(newLp, newDns);
}
}
}
return routesChanged;
}
/**
* Reads the network specific TCP buffer sizes from SystemProperties
* net.tcp.buffersize.[default|wifi|umts|edge|gprs] and set them for system
* wide use
*/
public void updateNetworkSettings(NetworkStateTracker nt) {
String key = nt.getTcpBufferSizesPropName();
String bufferSizes = SystemProperties.get(key);
if (bufferSizes.length() == 0) {
if (VDBG) log(key + " not found in system properties. Using defaults");
// Setting to default values so we won't be stuck to previous values
key = "net.tcp.buffersize.default";
bufferSizes = SystemProperties.get(key);
}
// Set values in kernel
if (bufferSizes.length() != 0) {
if (VDBG) {
log("Setting TCP values: [" + bufferSizes
+ "] which comes from [" + key + "]");
}
setBufferSize(bufferSizes);
}
}
/**
* Writes TCP buffer sizes to /sys/kernel/ipv4/tcp_[r/w]mem_[min/def/max]
* which maps to /proc/sys/net/ipv4/tcp_rmem and tcpwmem
*
* @param bufferSizes in the format of "readMin, readInitial, readMax,
* writeMin, writeInitial, writeMax"
*/
private void setBufferSize(String bufferSizes) {
try {
String[] values = bufferSizes.split(",");
if (values.length == 6) {
final String prefix = "/sys/kernel/ipv4/tcp_";
FileUtils.stringToFile(prefix + "rmem_min", values[0]);
FileUtils.stringToFile(prefix + "rmem_def", values[1]);
FileUtils.stringToFile(prefix + "rmem_max", values[2]);
FileUtils.stringToFile(prefix + "wmem_min", values[3]);
FileUtils.stringToFile(prefix + "wmem_def", values[4]);
FileUtils.stringToFile(prefix + "wmem_max", values[5]);
} else {
loge("Invalid buffersize string: " + bufferSizes);
}
} catch (IOException e) {
loge("Can't set tcp buffer sizes:" + e);
}
}
/**
* Adjust the per-process dns entries (net.dns<x>.<pid>) based
* on the highest priority active net which this process requested.
* If there aren't any, clear it out
*/
private void reassessPidDns(int myPid, boolean doBump)
{
if (VDBG) log("reassessPidDns for pid " + myPid);
for(int i : mPriorityList) {
if (mNetConfigs[i].isDefault()) {
continue;
}
NetworkStateTracker nt = mNetTrackers[i];
if (nt.getNetworkInfo().isConnected() &&
!nt.isTeardownRequested()) {
LinkProperties p = nt.getLinkProperties();
if (p == null) continue;
List pids = mNetRequestersPids[i];
for (int j=0; j<pids.size(); j++) {
Integer pid = (Integer)pids.get(j);
if (pid.intValue() == myPid) {
Collection<InetAddress> dnses = p.getDnses();
writePidDns(dnses, myPid);
if (doBump) {
bumpDns();
}
return;
}
}
}
}
// nothing found - delete
for (int i = 1; ; i++) {
String prop = "net.dns" + i + "." + myPid;
if (SystemProperties.get(prop).length() == 0) {
if (doBump) {
bumpDns();
}
return;
}
SystemProperties.set(prop, "");
}
}
// return true if results in a change
private boolean writePidDns(Collection <InetAddress> dnses, int pid) {
int j = 1;
boolean changed = false;
for (InetAddress dns : dnses) {
String dnsString = dns.getHostAddress();
if (changed || !dnsString.equals(SystemProperties.get("net.dns" + j + "." + pid))) {
changed = true;
SystemProperties.set("net.dns" + j++ + "." + pid, dns.getHostAddress());
}
}
return changed;
}
private void bumpDns() {
/*
* Bump the property that tells the name resolver library to reread
* the DNS server list from the properties.
*/
String propVal = SystemProperties.get("net.dnschange");
int n = 0;
if (propVal.length() != 0) {
try {
n = Integer.parseInt(propVal);
} catch (NumberFormatException e) {}
}
SystemProperties.set("net.dnschange", "" + (n+1));
/*
* Tell the VMs to toss their DNS caches
*/
Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
/*
* Connectivity events can happen before boot has completed ...
*/
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
mContext.sendBroadcast(intent);
}
// Caller must grab mDnsLock.
private boolean updateDns(String network, String iface,
Collection<InetAddress> dnses, String domains) {
boolean changed = false;
int last = 0;
if (dnses.size() == 0 && mDefaultDns != null) {
++last;
String value = mDefaultDns.getHostAddress();
if (!value.equals(SystemProperties.get("net.dns1"))) {
if (DBG) {
loge("no dns provided for " + network + " - using " + value);
}
changed = true;
SystemProperties.set("net.dns1", value);
}
} else {
for (InetAddress dns : dnses) {
++last;
String key = "net.dns" + last;
String value = dns.getHostAddress();
if (!changed && value.equals(SystemProperties.get(key))) {
continue;
}
if (VDBG) {
log("adding dns " + value + " for " + network);
}
changed = true;
SystemProperties.set(key, value);
}
}
for (int i = last + 1; i <= mNumDnsEntries; ++i) {
String key = "net.dns" + i;
if (VDBG) log("erasing " + key);
changed = true;
SystemProperties.set(key, "");
}
mNumDnsEntries = last;
if (changed) {
try {
mNetd.setDnsServersForInterface(iface, NetworkUtils.makeStrings(dnses));
mNetd.setDefaultInterfaceForDns(iface);
} catch (Exception e) {
if (DBG) loge("exception setting default dns interface: " + e);
}
}
if (!domains.equals(SystemProperties.get("net.dns.search"))) {
SystemProperties.set("net.dns.search", domains);
changed = true;
}
return changed;
}
private void handleDnsConfigurationChange(int netType) {
// add default net's dns entries
NetworkStateTracker nt = mNetTrackers[netType];
if (nt != null && nt.getNetworkInfo().isConnected() && !nt.isTeardownRequested()) {
LinkProperties p = nt.getLinkProperties();
if (p == null) return;
Collection<InetAddress> dnses = p.getDnses();
boolean changed = false;
if (mNetConfigs[netType].isDefault()) {
String network = nt.getNetworkInfo().getTypeName();
synchronized (mDnsLock) {
if (!mDnsOverridden) {
changed = updateDns(network, p.getInterfaceName(), dnses, "");
}
}
} else {
try {
mNetd.setDnsServersForInterface(p.getInterfaceName(),
NetworkUtils.makeStrings(dnses));
} catch (Exception e) {
if (DBG) loge("exception setting dns servers: " + e);
}
// set per-pid dns for attached secondary nets
List pids = mNetRequestersPids[netType];
for (int y=0; y< pids.size(); y++) {
Integer pid = (Integer)pids.get(y);
changed = writePidDns(dnses, pid.intValue());
}
}
if (changed) bumpDns();
}
}
private int getRestoreDefaultNetworkDelay(int networkType) {
String restoreDefaultNetworkDelayStr = SystemProperties.get(
NETWORK_RESTORE_DELAY_PROP_NAME);
if(restoreDefaultNetworkDelayStr != null &&
restoreDefaultNetworkDelayStr.length() != 0) {
try {
return Integer.valueOf(restoreDefaultNetworkDelayStr);
} catch (NumberFormatException e) {
}
}
// if the system property isn't set, use the value for the apn type
int ret = RESTORE_DEFAULT_NETWORK_DELAY;
if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) &&
(mNetConfigs[networkType] != null)) {
ret = mNetConfigs[networkType].restoreTime;
}
return ret;
}
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (mContext.checkCallingOrSelfPermission(
android.Manifest.permission.DUMP)
!= PackageManager.PERMISSION_GRANTED) {
pw.println("Permission Denial: can't dump ConnectivityService " +
"from from pid=" + Binder.getCallingPid() + ", uid=" +
Binder.getCallingUid());
return;
}
pw.println();
for (NetworkStateTracker nst : mNetTrackers) {
if (nst != null) {
if (nst.getNetworkInfo().isConnected()) {
pw.println("Active network: " + nst.getNetworkInfo().
getTypeName());
}
pw.println(nst.getNetworkInfo());
pw.println(nst);
pw.println();
}
}
pw.println("Network Requester Pids:");
for (int net : mPriorityList) {
String pidString = net + ": ";
for (Object pid : mNetRequestersPids[net]) {
pidString = pidString + pid.toString() + ", ";
}
pw.println(pidString);
}
pw.println();
pw.println("FeatureUsers:");
for (Object requester : mFeatureUsers) {
pw.println(requester.toString());
}
pw.println();
synchronized (this) {
pw.println("NetworkTranstionWakeLock is currently " +
(mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held.");
pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy);
}
pw.println();
mTethering.dump(fd, pw, args);
if (mInetLog != null) {
pw.println();
pw.println("Inet condition reports:");
for(int i = 0; i < mInetLog.size(); i++) {
pw.println(mInetLog.get(i));
}
}
}
// must be stateless - things change under us.
private class MyHandler extends Handler {
public MyHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
NetworkInfo info;
switch (msg.what) {
case NetworkStateTracker.EVENT_STATE_CHANGED:
info = (NetworkInfo) msg.obj;
int type = info.getType();
NetworkInfo.State state = info.getState();
if (VDBG || (state == NetworkInfo.State.CONNECTED) ||
(state == NetworkInfo.State.DISCONNECTED)) {
log("ConnectivityChange for " +
info.getTypeName() + ": " +
state + "/" + info.getDetailedState());
}
// Connectivity state changed:
// [31-13] Reserved for future use
// [12-9] Network subtype (for mobile network, as defined
// by TelephonyManager)
// [8-3] Detailed state ordinal (as defined by
// NetworkInfo.DetailedState)
// [2-0] Network type (as defined by ConnectivityManager)
int eventLogParam = (info.getType() & 0x7) |
((info.getDetailedState().ordinal() & 0x3f) << 3) |
(info.getSubtype() << 9);
EventLog.writeEvent(EventLogTags.CONNECTIVITY_STATE_CHANGED,
eventLogParam);
if (info.getDetailedState() ==
NetworkInfo.DetailedState.FAILED) {
handleConnectionFailure(info);
} else if (state == NetworkInfo.State.DISCONNECTED) {
handleDisconnect(info);
} else if (state == NetworkInfo.State.SUSPENDED) {
// TODO: need to think this over.
// the logic here is, handle SUSPENDED the same as
// DISCONNECTED. The only difference being we are
// broadcasting an intent with NetworkInfo that's
// suspended. This allows the applications an
// opportunity to handle DISCONNECTED and SUSPENDED
// differently, or not.
handleDisconnect(info);
} else if (state == NetworkInfo.State.CONNECTED) {
handleConnect(info);
}
break;
case NetworkStateTracker.EVENT_CONFIGURATION_CHANGED:
info = (NetworkInfo) msg.obj;
// TODO: Temporary allowing network configuration
// change not resetting sockets.
// @see bug/4455071
handleConnectivityChange(info.getType(), false);
break;
case EVENT_CLEAR_NET_TRANSITION_WAKELOCK:
String causedBy = null;
synchronized (ConnectivityService.this) {
if (msg.arg1 == mNetTransitionWakeLockSerialNumber &&
mNetTransitionWakeLock.isHeld()) {
mNetTransitionWakeLock.release();
causedBy = mNetTransitionWakeLockCausedBy;
}
}
if (causedBy != null) {
log("NetTransition Wakelock for " + causedBy + " released by timeout");
}
break;
case EVENT_RESTORE_DEFAULT_NETWORK:
FeatureUser u = (FeatureUser)msg.obj;
u.expire();
break;
case EVENT_INET_CONDITION_CHANGE:
{
int netType = msg.arg1;
int condition = msg.arg2;
handleInetConditionChange(netType, condition);
break;
}
case EVENT_INET_CONDITION_HOLD_END:
{
int netType = msg.arg1;
int sequence = msg.arg2;
handleInetConditionHoldEnd(netType, sequence);
break;
}
case EVENT_SET_NETWORK_PREFERENCE:
{
int preference = msg.arg1;
handleSetNetworkPreference(preference);
break;
}
case EVENT_SET_MOBILE_DATA:
{
boolean enabled = (msg.arg1 == ENABLED);
handleSetMobileData(enabled);
break;
}
case EVENT_APPLY_GLOBAL_HTTP_PROXY:
{
handleDeprecatedGlobalHttpProxy();
break;
}
case EVENT_SET_DEPENDENCY_MET:
{
boolean met = (msg.arg1 == ENABLED);
handleSetDependencyMet(msg.arg2, met);
break;
}
case EVENT_RESTORE_DNS:
{
if (mActiveDefaultNetwork != -1) {
handleDnsConfigurationChange(mActiveDefaultNetwork);
}
break;
}
case EVENT_SEND_STICKY_BROADCAST_INTENT:
{
Intent intent = (Intent)msg.obj;
sendStickyBroadcast(intent);
break;
}
case EVENT_SET_POLICY_DATA_ENABLE: {
final int networkType = msg.arg1;
final boolean enabled = msg.arg2 == ENABLED;
handleSetPolicyDataEnable(networkType, enabled);
}
}
}
}
// javadoc from interface
public int tether(String iface) {
enforceTetherChangePermission();
if (isTetheringSupported()) {
return mTethering.tether(iface);
} else {
return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
}
}
// javadoc from interface
public int untether(String iface) {
enforceTetherChangePermission();
if (isTetheringSupported()) {
return mTethering.untether(iface);
} else {
return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
}
}
// javadoc from interface
public int getLastTetherError(String iface) {
enforceTetherAccessPermission();
if (isTetheringSupported()) {
return mTethering.getLastTetherError(iface);
} else {
return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
}
}
// TODO - proper iface API for selection by property, inspection, etc
public String[] getTetherableUsbRegexs() {
enforceTetherAccessPermission();
if (isTetheringSupported()) {
return mTethering.getTetherableUsbRegexs();
} else {
return new String[0];
}
}
public String[] getTetherableWifiRegexs() {
enforceTetherAccessPermission();
if (isTetheringSupported()) {
return mTethering.getTetherableWifiRegexs();
} else {
return new String[0];
}
}
public String[] getTetherableBluetoothRegexs() {
enforceTetherAccessPermission();
if (isTetheringSupported()) {
return mTethering.getTetherableBluetoothRegexs();
} else {
return new String[0];
}
}
public int setUsbTethering(boolean enable) {
enforceTetherAccessPermission();
if (isTetheringSupported()) {
return mTethering.setUsbTethering(enable);
} else {
return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
}
}
// TODO - move iface listing, queries, etc to new module
// javadoc from interface
public String[] getTetherableIfaces() {
enforceTetherAccessPermission();
return mTethering.getTetherableIfaces();
}
public String[] getTetheredIfaces() {
enforceTetherAccessPermission();
return mTethering.getTetheredIfaces();
}
@Override
public String[] getTetheredIfacePairs() {
enforceTetherAccessPermission();
return mTethering.getTetheredIfacePairs();
}
public String[] getTetheringErroredIfaces() {
enforceTetherAccessPermission();
return mTethering.getErroredIfaces();
}
// if ro.tether.denied = true we default to no tethering
// gservices could set the secure setting to 1 though to enable it on a build where it
// had previously been turned off.
public boolean isTetheringSupported() {
enforceTetherAccessPermission();
int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1);
boolean tetherEnabledInSettings = (Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.TETHER_SUPPORTED, defaultVal) != 0);
return tetherEnabledInSettings && mTetheringConfigValid;
}
// An API NetworkStateTrackers can call when they lose their network.
// This will automatically be cleared after X seconds or a network becomes CONNECTED,
// whichever happens first. The timer is started by the first caller and not
// restarted by subsequent callers.
public void requestNetworkTransitionWakelock(String forWhom) {
enforceConnectivityInternalPermission();
synchronized (this) {
if (mNetTransitionWakeLock.isHeld()) return;
mNetTransitionWakeLockSerialNumber++;
mNetTransitionWakeLock.acquire();
mNetTransitionWakeLockCausedBy = forWhom;
}
mHandler.sendMessageDelayed(mHandler.obtainMessage(
EVENT_CLEAR_NET_TRANSITION_WAKELOCK,
mNetTransitionWakeLockSerialNumber, 0),
mNetTransitionWakeLockTimeout);
return;
}
// 100 percent is full good, 0 is full bad.
public void reportInetCondition(int networkType, int percentage) {
if (VDBG) log("reportNetworkCondition(" + networkType + ", " + percentage + ")");
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.STATUS_BAR,
"ConnectivityService");
if (DBG) {
int pid = getCallingPid();
int uid = getCallingUid();
String s = pid + "(" + uid + ") reports inet is " +
(percentage > 50 ? "connected" : "disconnected") + " (" + percentage + ") on " +
"network Type " + networkType + " at " + GregorianCalendar.getInstance().getTime();
mInetLog.add(s);
while(mInetLog.size() > INET_CONDITION_LOG_MAX_SIZE) {
mInetLog.remove(0);
}
}
mHandler.sendMessage(mHandler.obtainMessage(
EVENT_INET_CONDITION_CHANGE, networkType, percentage));
}
private void handleInetConditionChange(int netType, int condition) {
if (mActiveDefaultNetwork == -1) {
if (DBG) log("handleInetConditionChange: no active default network - ignore");
return;
}
if (mActiveDefaultNetwork != netType) {
if (DBG) log("handleInetConditionChange: net=" + netType +
" != default=" + mActiveDefaultNetwork + " - ignore");
return;
}
if (VDBG) {
log("handleInetConditionChange: net=" +
netType + ", condition=" + condition +
",mActiveDefaultNetwork=" + mActiveDefaultNetwork);
}
mDefaultInetCondition = condition;
int delay;
if (mInetConditionChangeInFlight == false) {
if (VDBG) log("handleInetConditionChange: starting a change hold");
// setup a new hold to debounce this
if (mDefaultInetCondition > 50) {
delay = Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.INET_CONDITION_DEBOUNCE_UP_DELAY, 500);
} else {
delay = Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.INET_CONDITION_DEBOUNCE_DOWN_DELAY, 3000);
}
mInetConditionChangeInFlight = true;
mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_INET_CONDITION_HOLD_END,
mActiveDefaultNetwork, mDefaultConnectionSequence), delay);
} else {
// we've set the new condition, when this hold ends that will get picked up
if (VDBG) log("handleInetConditionChange: currently in hold - not setting new end evt");
}
}
private void handleInetConditionHoldEnd(int netType, int sequence) {
if (DBG) {
log("handleInetConditionHoldEnd: net=" + netType +
", condition=" + mDefaultInetCondition +
", published condition=" + mDefaultInetConditionPublished);
}
mInetConditionChangeInFlight = false;
if (mActiveDefaultNetwork == -1) {
if (DBG) log("handleInetConditionHoldEnd: no active default network - ignoring");
return;
}
if (mDefaultConnectionSequence != sequence) {
if (DBG) log("handleInetConditionHoldEnd: event hold for obsolete network - ignoring");
return;
}
// TODO: Figure out why this optimization sometimes causes a
// change in mDefaultInetCondition to be missed and the
// UI to not be updated.
//if (mDefaultInetConditionPublished == mDefaultInetCondition) {
// if (DBG) log("no change in condition - aborting");
// return;
//}
NetworkInfo networkInfo = mNetTrackers[mActiveDefaultNetwork].getNetworkInfo();
if (networkInfo.isConnected() == false) {
if (DBG) log("handleInetConditionHoldEnd: default network not connected - ignoring");
return;
}
mDefaultInetConditionPublished = mDefaultInetCondition;
sendInetConditionBroadcast(networkInfo);
return;
}
public ProxyProperties getProxy() {
synchronized (mDefaultProxyLock) {
return mDefaultProxyDisabled ? null : mDefaultProxy;
}
}
public void setGlobalProxy(ProxyProperties proxyProperties) {
enforceChangePermission();
synchronized (mGlobalProxyLock) {
if (proxyProperties == mGlobalProxy) return;
if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return;
if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return;
String host = "";
int port = 0;
String exclList = "";
if (proxyProperties != null && !TextUtils.isEmpty(proxyProperties.getHost())) {
mGlobalProxy = new ProxyProperties(proxyProperties);
host = mGlobalProxy.getHost();
port = mGlobalProxy.getPort();
exclList = mGlobalProxy.getExclusionList();
} else {
mGlobalProxy = null;
}
ContentResolver res = mContext.getContentResolver();
Settings.Secure.putString(res, Settings.Secure.GLOBAL_HTTP_PROXY_HOST, host);
Settings.Secure.putInt(res, Settings.Secure.GLOBAL_HTTP_PROXY_PORT, port);
Settings.Secure.putString(res, Settings.Secure.GLOBAL_HTTP_PROXY_EXCLUSION_LIST,
exclList);
}
if (mGlobalProxy == null) {
proxyProperties = mDefaultProxy;
}
//sendProxyBroadcast(proxyProperties);
}
private void loadGlobalProxy() {
ContentResolver res = mContext.getContentResolver();
String host = Settings.Secure.getString(res, Settings.Secure.GLOBAL_HTTP_PROXY_HOST);
int port = Settings.Secure.getInt(res, Settings.Secure.GLOBAL_HTTP_PROXY_PORT, 0);
String exclList = Settings.Secure.getString(res,
Settings.Secure.GLOBAL_HTTP_PROXY_EXCLUSION_LIST);
if (!TextUtils.isEmpty(host)) {
ProxyProperties proxyProperties = new ProxyProperties(host, port, exclList);
synchronized (mGlobalProxyLock) {
mGlobalProxy = proxyProperties;
}
}
}
public ProxyProperties getGlobalProxy() {
synchronized (mGlobalProxyLock) {
return mGlobalProxy;
}
}
private void handleApplyDefaultProxy(ProxyProperties proxy) {
if (proxy != null && TextUtils.isEmpty(proxy.getHost())) {
proxy = null;
}
synchronized (mDefaultProxyLock) {
if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return;
if (mDefaultProxy == proxy) return;
mDefaultProxy = proxy;
if (!mDefaultProxyDisabled) {
sendProxyBroadcast(proxy);
}
}
}
private void handleDeprecatedGlobalHttpProxy() {
String proxy = Settings.Secure.getString(mContext.getContentResolver(),
Settings.Secure.HTTP_PROXY);
if (!TextUtils.isEmpty(proxy)) {
String data[] = proxy.split(":");
String proxyHost = data[0];
int proxyPort = 8080;
if (data.length > 1) {
try {
proxyPort = Integer.parseInt(data[1]);
} catch (NumberFormatException e) {
return;
}
}
ProxyProperties p = new ProxyProperties(data[0], proxyPort, "");
setGlobalProxy(p);
}
}
private void sendProxyBroadcast(ProxyProperties proxy) {
if (proxy == null) proxy = new ProxyProperties("", 0, "");
if (DBG) log("sending Proxy Broadcast for " + proxy);
Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING |
Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy);
mContext.sendStickyBroadcast(intent);
}
private static class SettingsObserver extends ContentObserver {
private int mWhat;
private Handler mHandler;
SettingsObserver(Handler handler, int what) {
super(handler);
mHandler = handler;
mWhat = what;
}
void observe(Context context) {
ContentResolver resolver = context.getContentResolver();
resolver.registerContentObserver(Settings.Secure.getUriFor(
Settings.Secure.HTTP_PROXY), false, this);
}
@Override
public void onChange(boolean selfChange) {
mHandler.obtainMessage(mWhat).sendToTarget();
}
}
private void log(String s) {
Slog.d(TAG, s);
}
private void loge(String s) {
Slog.e(TAG, s);
}
int convertFeatureToNetworkType(int networkType, String feature) {
int usedNetworkType = networkType;
if(networkType == ConnectivityManager.TYPE_MOBILE) {
if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_MMS)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_MMS;
} else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_SUPL)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_SUPL;
} else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_DUN) ||
TextUtils.equals(feature, Phone.FEATURE_ENABLE_DUN_ALWAYS)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_DUN;
} else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_HIPRI)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_HIPRI;
} else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_FOTA)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_FOTA;
} else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_IMS)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_IMS;
} else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_CBS)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_CBS;
} else {
Slog.e(TAG, "Can't match any mobile netTracker!");
}
} else if (networkType == ConnectivityManager.TYPE_WIFI) {
if (TextUtils.equals(feature, "p2p")) {
usedNetworkType = ConnectivityManager.TYPE_WIFI_P2P;
} else {
Slog.e(TAG, "Can't match any wifi netTracker!");
}
} else {
Slog.e(TAG, "Unexpected network type");
}
return usedNetworkType;
}
private static <T> T checkNotNull(T value, String message) {
if (value == null) {
throw new NullPointerException(message);
}
return value;
}
/**
* Protect a socket from VPN routing rules. This method is used by
* VpnBuilder and not available in ConnectivityManager. Permissions
* are checked in Vpn class.
* @hide
*/
@Override
public boolean protectVpn(ParcelFileDescriptor socket) {
try {
int type = mActiveDefaultNetwork;
if (ConnectivityManager.isNetworkTypeValid(type)) {
mVpn.protect(socket, mNetTrackers[type].getLinkProperties().getInterfaceName());
return true;
}
} catch (Exception e) {
// ignore
} finally {
try {
socket.close();
} catch (Exception e) {
// ignore
}
}
return false;
}
/**
* Prepare for a VPN application. This method is used by VpnDialogs
* and not available in ConnectivityManager. Permissions are checked
* in Vpn class.
* @hide
*/
@Override
public boolean prepareVpn(String oldPackage, String newPackage) {
return mVpn.prepare(oldPackage, newPackage);
}
/**
* Configure a TUN interface and return its file descriptor. Parameters
* are encoded and opaque to this class. This method is used by VpnBuilder
* and not available in ConnectivityManager. Permissions are checked in
* Vpn class.
* @hide
*/
@Override
public ParcelFileDescriptor establishVpn(VpnConfig config) {
return mVpn.establish(config);
}
/**
* Start legacy VPN and return an intent to VpnDialogs. This method is
* used by VpnSettings and not available in ConnectivityManager.
* Permissions are checked in Vpn class.
* @hide
*/
@Override
public void startLegacyVpn(VpnConfig config, String[] racoon, String[] mtpd) {
mVpn.startLegacyVpn(config, racoon, mtpd);
}
/**
* Return the information of the ongoing legacy VPN. This method is used
* by VpnSettings and not available in ConnectivityManager. Permissions
* are checked in Vpn class.
* @hide
*/
@Override
public LegacyVpnInfo getLegacyVpnInfo() {
return mVpn.getLegacyVpnInfo();
}
/**
* Callback for VPN subsystem. Currently VPN is not adapted to the service
* through NetworkStateTracker since it works differently. For example, it
* needs to override DNS servers but never takes the default routes. It
* relies on another data network, and it could keep existing connections
* alive after reconnecting, switching between networks, or even resuming
* from deep sleep. Calls from applications should be done synchronously
* to avoid race conditions. As these are all hidden APIs, refactoring can
* be done whenever a better abstraction is developed.
*/
public class VpnCallback {
private VpnCallback() {
}
public void override(List<String> dnsServers, List<String> searchDomains) {
if (dnsServers == null) {
restore();
return;
}
// Convert DNS servers into addresses.
List<InetAddress> addresses = new ArrayList<InetAddress>();
for (String address : dnsServers) {
// Double check the addresses and remove invalid ones.
try {
addresses.add(InetAddress.parseNumericAddress(address));
} catch (Exception e) {
// ignore
}
}
if (addresses.isEmpty()) {
restore();
return;
}
// Concatenate search domains into a string.
StringBuilder buffer = new StringBuilder();
if (searchDomains != null) {
for (String domain : searchDomains) {
buffer.append(domain).append(' ');
}
}
String domains = buffer.toString().trim();
// Apply DNS changes.
boolean changed = false;
synchronized (mDnsLock) {
changed = updateDns("VPN", "VPN", addresses, domains);
mDnsOverridden = true;
}
if (changed) {
bumpDns();
}
// Temporarily disable the default proxy.
synchronized (mDefaultProxyLock) {
mDefaultProxyDisabled = true;
if (mDefaultProxy != null) {
sendProxyBroadcast(null);
}
}
// TODO: support proxy per network.
}
public void restore() {
synchronized (mDnsLock) {
if (mDnsOverridden) {
mDnsOverridden = false;
mHandler.sendEmptyMessage(EVENT_RESTORE_DNS);
}
}
synchronized (mDefaultProxyLock) {
mDefaultProxyDisabled = false;
if (mDefaultProxy != null) {
sendProxyBroadcast(mDefaultProxy);
}
}
}
}
}