/*
* 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 android.app.Notification;
import android.app.NotificationManager;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.IConnectivityManager;
import android.net.MobileDataStateTracker;
import android.net.NetworkInfo;
import android.net.NetworkStateTracker;
import android.net.wifi.WifiStateTracker;
import android.os.Binder;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
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 com.android.internal.telephony.Phone;
import com.android.server.connectivity.Tethering;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
/**
* @hide
*/
public class ConnectivityService extends IConnectivityManager.Stub {
private static final boolean DBG = true;
private static final String TAG = "ConnectivityService";
// 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";
private Tethering mTethering;
private boolean mTetheringConfigValid = false;
/**
* Sometimes we want to refer to the individual network state
* trackers separately, and sometimes we just want to treat them
* abstractly.
*/
private NetworkStateTracker mNetTrackers[];
/**
* 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;
private int mNumDnsEntries;
private boolean mTestMode;
private static ConnectivityService sServiceInstance;
private Handler mHandler;
// list of DeathRecipients used to make sure features are turned off when
// a process dies
private List mFeatureUsers;
private boolean mSystemReady;
private Intent mInitialBroadcast;
private static class NetworkAttributes {
/**
* Class for holding settings read from resources.
*/
public String mName;
public int mType;
public int mRadio;
public int mPriority;
public NetworkInfo.State mLastState;
public NetworkAttributes(String init) {
String fragments[] = init.split(",");
mName = fragments[0].toLowerCase();
mType = Integer.parseInt(fragments[1]);
mRadio = Integer.parseInt(fragments[2]);
mPriority = Integer.parseInt(fragments[3]);
mLastState = NetworkInfo.State.UNKNOWN;
}
public boolean isDefault() {
return (mType == mRadio);
}
}
NetworkAttributes[] mNetAttributes;
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;
private static class ConnectivityThread extends Thread {
private Context mContext;
private ConnectivityThread(Context context) {
super("ConnectivityThread");
mContext = context;
}
@Override
public void run() {
Looper.prepare();
synchronized (this) {
sServiceInstance = new ConnectivityService(mContext);
notifyAll();
}
Looper.loop();
}
public static ConnectivityService getServiceInstance(Context context) {
ConnectivityThread thread = new ConnectivityThread(context);
thread.start();
synchronized (thread) {
while (sServiceInstance == null) {
try {
// Wait until sServiceInstance has been initialized.
thread.wait();
} catch (InterruptedException ignore) {
Slog.e(TAG,
"Unexpected InterruptedException while waiting"+
" for ConnectivityService thread");
}
}
}
return sServiceInstance;
}
}
public static ConnectivityService getInstance(Context context) {
return ConnectivityThread.getServiceInstance(context);
}
private ConnectivityService(Context context) {
if (DBG) Slog.v(TAG, "ConnectivityService starting up");
// setup our unique device name
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);
}
mContext = context;
mNetTrackers = new NetworkStateTracker[
ConnectivityManager.MAX_NETWORK_TYPE+1];
mHandler = new MyHandler();
mNetworkPreference = getPersistedNetworkPreference();
mRadioAttributes = new RadioAttributes[ConnectivityManager.MAX_RADIO_TYPE+1];
mNetAttributes = new NetworkAttributes[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) {
Slog.e(TAG, "Error in radioAttributes - ignoring attempt to define type " + r.mType);
continue;
}
if (mRadioAttributes[r.mType] != null) {
Slog.e(TAG, "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 {
NetworkAttributes n = new NetworkAttributes(naString);
if (n.mType > ConnectivityManager.MAX_NETWORK_TYPE) {
Slog.e(TAG, "Error in networkAttributes - ignoring attempt to define type " +
n.mType);
continue;
}
if (mNetAttributes[n.mType] != null) {
Slog.e(TAG, "Error in networkAttributes - ignoring attempt to redefine type " +
n.mType);
continue;
}
if (mRadioAttributes[n.mRadio] == null) {
Slog.e(TAG, "Error in networkAttributes - ignoring attempt to use undefined " +
"radio " + n.mRadio + " in network type " + n.mType);
continue;
}
mNetAttributes[n.mType] = n;
mNetworksDefined++;
} catch(Exception e) {
// ignore it - leave the entry null
}
}
// high priority first
mPriorityList = new int[mNetworksDefined];
{
int insertionPoint = mNetworksDefined-1;
int currentLowest = 0;
int nextLowest = 0;
while (insertionPoint > -1) {
for (NetworkAttributes na : mNetAttributes) {
if (na == null) continue;
if (na.mPriority < currentLowest) continue;
if (na.mPriority > currentLowest) {
if (na.mPriority < nextLowest || nextLowest == 0) {
nextLowest = na.mPriority;
}
continue;
}
mPriorityList[insertionPoint--] = na.mType;
}
currentLowest = nextLowest;
nextLowest = 0;
}
}
mNetRequestersPids = new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE+1];
for (int i : mPriorityList) {
mNetRequestersPids[i] = new ArrayList();
}
mFeatureUsers = new ArrayList();
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.
*/
boolean noMobileData = !getMobileDataEnabled();
for (int netType : mPriorityList) {
switch (mNetAttributes[netType].mRadio) {
case ConnectivityManager.TYPE_WIFI:
if (DBG) Slog.v(TAG, "Starting Wifi Service.");
WifiStateTracker wst = new WifiStateTracker(context, mHandler);
WifiService wifiService = new WifiService(context, wst);
ServiceManager.addService(Context.WIFI_SERVICE, wifiService);
wifiService.startWifi();
mNetTrackers[ConnectivityManager.TYPE_WIFI] = wst;
wst.startMonitoring();
break;
case ConnectivityManager.TYPE_MOBILE:
mNetTrackers[netType] = new MobileDataStateTracker(context, mHandler,
netType, mNetAttributes[netType].mName);
mNetTrackers[netType].startMonitoring();
if (noMobileData) {
if (DBG) Slog.d(TAG, "tearing down Mobile networks due to setting");
mNetTrackers[netType].teardown();
}
break;
default:
Slog.e(TAG, "Trying to create a DataStateTracker for an unknown radio type " +
mNetAttributes[netType].mRadio);
continue;
}
}
mTethering = new Tethering(mContext, mHandler.getLooper());
mTetheringConfigValid = (((mNetTrackers[ConnectivityManager.TYPE_MOBILE_DUN] != null) ||
!mTethering.isDunRequired()) &&
(mTethering.getTetherableUsbRegexs().length != 0 ||
mTethering.getTetherableWifiRegexs().length != 0) &&
mTethering.getUpstreamIfaceRegexs().length != 0);
}
/**
* Sets the preferred network.
* @param preference the new preference
*/
public synchronized void setNetworkPreference(int preference) {
enforceChangePermission();
if (ConnectivityManager.isNetworkTypeValid(preference) &&
mNetAttributes[preference] != null &&
mNetAttributes[preference].isDefault()) {
if (mNetworkPreference != preference) {
persistNetworkPreference(preference);
mNetworkPreference = preference;
enforcePreference();
}
}
}
public int getNetworkPreference() {
enforceAccessPermission();
return mNetworkPreference;
}
private void persistNetworkPreference(int networkPreference) {
final ContentResolver cr = mContext.getContentResolver();
Settings.Secure.putInt(cr, Settings.Secure.NETWORK_PREFERENCE,
networkPreference);
}
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) {
Slog.d(TAG, "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;
}
}
/**
* 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
*/
public NetworkInfo getActiveNetworkInfo() {
enforceAccessPermission();
for (int type=0; type <= ConnectivityManager.MAX_NETWORK_TYPE; type++) {
if (mNetAttributes[type] == null || !mNetAttributes[type].isDefault()) {
continue;
}
NetworkStateTracker t = mNetTrackers[type];
NetworkInfo info = t.getNetworkInfo();
if (info.isConnected()) {
if (DBG && type != mActiveDefaultNetwork) Slog.e(TAG,
"connected default network is not " +
"mActiveDefaultNetwork!");
return info;
}
}
return null;
}
public NetworkInfo getNetworkInfo(int networkType) {
enforceAccessPermission();
if (ConnectivityManager.isNetworkTypeValid(networkType)) {
NetworkStateTracker t = mNetTrackers[networkType];
if (t != null)
return t.getNetworkInfo();
}
return null;
}
public NetworkInfo[] getAllNetworkInfo() {
enforceAccessPermission();
NetworkInfo[] result = new NetworkInfo[mNetworksDefined];
int i = 0;
for (NetworkStateTracker t : mNetTrackers) {
if(t != null) result[i++] = t.getNetworkInfo();
}
return result;
}
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() {
Slog.d(TAG, "ConnectivityService FeatureUser binderDied(" +
mNetworkType + ", " + mFeature + ", " + mBinder + "), created " +
(System.currentTimeMillis() - mCreateTime) + " mSec ago");
stopUsingNetworkFeature(this, false);
}
public void expire() {
Slog.d(TAG, "ConnectivityService FeatureUser expire(" +
mNetworkType + ", " + mFeature + ", " + mBinder +"), created " +
(System.currentTimeMillis() - mCreateTime) + " mSec ago");
stopUsingNetworkFeature(this, 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 (DBG) {
Slog.d(TAG, "startUsingNetworkFeature for net " + networkType +
": " + feature);
}
enforceChangePermission();
if (!ConnectivityManager.isNetworkTypeValid(networkType) ||
mNetAttributes[networkType] == null) {
return Phone.APN_REQUEST_FAILED;
}
FeatureUser f = new FeatureUser(networkType, feature, binder);
// TODO - move this into the MobileDataStateTracker
int usedNetworkType = networkType;
if(networkType == ConnectivityManager.TYPE_MOBILE) {
if (!getMobileDataEnabled()) {
if (DBG) Slog.d(TAG, "requested special network with data disabled - rejected");
return Phone.APN_TYPE_NOT_AVAILABLE;
}
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)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_DUN;
} else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_HIPRI)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_HIPRI;
}
}
NetworkStateTracker network = mNetTrackers[usedNetworkType];
if (network != null) {
if (usedNetworkType != networkType) {
Integer currentPid = new Integer(getCallingPid());
NetworkStateTracker radio = mNetTrackers[networkType];
NetworkInfo ni = network.getNetworkInfo();
if (ni.isAvailable() == false) {
if (DBG) Slog.d(TAG, "special network not available");
return Phone.APN_TYPE_NOT_AVAILABLE;
}
synchronized(this) {
mFeatureUsers.add(f);
if (!mNetRequestersPids[usedNetworkType].contains(currentPid)) {
// this gets used for per-pid dns when connected
mNetRequestersPids[usedNetworkType].add(currentPid);
}
}
mHandler.sendMessageDelayed(mHandler.obtainMessage(
NetworkStateTracker.EVENT_RESTORE_DEFAULT_NETWORK,
f), getRestoreDefaultNetworkDelay());
if ((ni.isConnectedOrConnecting() == true) &&
!network.isTeardownRequested()) {
if (ni.isConnected() == true) {
// add the pid-specific dns
handleDnsConfigurationChange();
if (DBG) Slog.d(TAG, "special network already active");
return Phone.APN_ALREADY_ACTIVE;
}
if (DBG) Slog.d(TAG, "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) Slog.d(TAG, "reconnecting to special network");
network.reconnect();
return Phone.APN_REQUEST_STARTED;
} else {
synchronized(this) {
mFeatureUsers.add(f);
}
mHandler.sendMessageDelayed(mHandler.obtainMessage(
NetworkStateTracker.EVENT_RESTORE_DEFAULT_NETWORK,
f), getRestoreDefaultNetworkDelay());
return network.startUsingNetworkFeature(feature,
getCallingPid(), getCallingUid());
}
}
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 (int i = 0; i < mFeatureUsers.size() ; i++) {
u = (FeatureUser)mFeatureUsers.get(i);
if (uid == u.mUid && pid == u.mPid &&
networkType == u.mNetworkType &&
TextUtils.equals(feature, u.mFeature)) {
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 (DBG) Slog.d(TAG, "ignoring stopUsingNetworkFeature - not a live request");
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 (DBG) {
Slog.d(TAG, "stopUsingNetworkFeature for net " + networkType +
": " + feature);
}
if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
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 (DBG) Slog.d(TAG, "ignoring - this process has no outstanding requests");
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 (int i = 0; i < mFeatureUsers.size() ; i++) {
FeatureUser x = (FeatureUser)mFeatureUsers.get(i);
if (x.mUid == u.mUid && x.mPid == u.mPid &&
x.mNetworkType == u.mNetworkType &&
TextUtils.equals(x.mFeature, u.mFeature)) {
if (DBG) Slog.d(TAG, "ignoring stopUsingNetworkFeature as dup is found");
return 1;
}
}
}
// TODO - move to MobileDataStateTracker
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)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_DUN;
} else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_HIPRI)) {
usedNetworkType = ConnectivityManager.TYPE_MOBILE_HIPRI;
}
}
tracker = mNetTrackers[usedNetworkType];
if (tracker == null) {
if (DBG) Slog.d(TAG, "ignoring - no known tracker for 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 (DBG) Slog.d(TAG, "not tearing down special network - " +
"others still using it");
return 1;
}
callTeardown = true;
}
}
if (DBG) Slog.d(TAG, "Doing network teardown");
if (callTeardown) {
tracker.teardown();
return 1;
} else {
// do it the old fashioned way
return tracker.stopUsingNetworkFeature(feature, pid, uid);
}
}
/**
* 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) {
enforceChangePermission();
if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
return false;
}
NetworkStateTracker tracker = mNetTrackers[networkType];
if (tracker == null || !tracker.getNetworkInfo().isConnected() ||
tracker.isTeardownRequested()) {
if (DBG) {
Slog.d(TAG, "requestRouteToHost on down network (" + networkType + ") - dropped");
}
return false;
}
return tracker.requestRouteToHost(hostAddress);
}
/**
* @see ConnectivityManager#getBackgroundDataSetting()
*/
public boolean getBackgroundDataSetting() {
return Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.BACKGROUND_DATA, 1) == 1;
}
/**
* @see ConnectivityManager#setBackgroundDataSetting(boolean)
*/
public void setBackgroundDataSetting(boolean allowBackgroundDataUsage) {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.CHANGE_BACKGROUND_DATA_SETTING,
"ConnectivityService");
if (getBackgroundDataSetting() == allowBackgroundDataUsage) return;
Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.BACKGROUND_DATA,
allowBackgroundDataUsage ? 1 : 0);
Intent broadcast = new Intent(
ConnectivityManager.ACTION_BACKGROUND_DATA_SETTING_CHANGED);
mContext.sendBroadcast(broadcast);
}
/**
* @see ConnectivityManager#getMobileDataEnabled()
*/
public boolean getMobileDataEnabled() {
enforceAccessPermission();
boolean retVal = Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.MOBILE_DATA, 1) == 1;
if (DBG) Slog.d(TAG, "getMobileDataEnabled returning " + retVal);
return retVal;
}
/**
* @see ConnectivityManager#setMobileDataEnabled(boolean)
*/
public synchronized void setMobileDataEnabled(boolean enabled) {
enforceChangePermission();
if (DBG) Slog.d(TAG, "setMobileDataEnabled(" + enabled + ")");
if (getMobileDataEnabled() == enabled) return;
Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.MOBILE_DATA, enabled ? 1 : 0);
if (enabled) {
if (mNetTrackers[ConnectivityManager.TYPE_MOBILE] != null) {
if (DBG) Slog.d(TAG, "starting up " + mNetTrackers[ConnectivityManager.TYPE_MOBILE]);
mNetTrackers[ConnectivityManager.TYPE_MOBILE].reconnect();
}
} else {
for (NetworkStateTracker nt : mNetTrackers) {
if (nt == null) continue;
int netType = nt.getNetworkInfo().getType();
if (mNetAttributes[netType].mRadio == ConnectivityManager.TYPE_MOBILE) {
if (DBG) Slog.d(TAG, "tearing down " + nt);
nt.teardown();
}
}
}
}
private int getNumConnectedNetworks() {
int numConnectedNets = 0;
for (NetworkStateTracker nt : mNetTrackers) {
if (nt != null && nt.getNetworkInfo().isConnected() &&
!nt.isTeardownRequested()) {
++numConnectedNets;
}
}
return numConnectedNets;
}
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");
}
/**
* 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 (!mNetAttributes[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.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
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());
}
NetworkStateTracker newNet = null;
if (mNetAttributes[prevNetType].isDefault()) {
newNet = tryFailover(prevNetType);
if (newNet != null) {
NetworkInfo switchTo = newNet.getNetworkInfo();
intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, switchTo);
} else {
intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
}
}
// do this before we broadcast the change
handleConnectivityChange();
sendStickyBroadcast(intent);
/*
* If the failover network is already connected, then immediately send
* out a followup broadcast indicating successful failover
*/
if (newNet != null && newNet.getNetworkInfo().isConnected()) {
sendConnectedBroadcast(newNet.getNetworkInfo());
}
}
// returns null if no failover available
private NetworkStateTracker tryFailover(int prevNetType) {
/*
* If this is a default network, check if other defaults are available
* or active
*/
NetworkStateTracker newNet = null;
if (mNetAttributes[prevNetType].isDefault()) {
if (mActiveDefaultNetwork == prevNetType) {
mActiveDefaultNetwork = -1;
}
int newType = -1;
int newPriority = -1;
boolean noMobileData = !getMobileDataEnabled();
for (int checkType=0; checkType <= ConnectivityManager.MAX_NETWORK_TYPE; checkType++) {
if (checkType == prevNetType) continue;
if (mNetAttributes[checkType] == null) continue;
if (mNetAttributes[checkType].mRadio == ConnectivityManager.TYPE_MOBILE &&
noMobileData) {
if (DBG) {
Slog.d(TAG, "not failing over to mobile type " + checkType +
" because Mobile Data Disabled");
}
continue;
}
if (mNetAttributes[checkType].isDefault()) {
/* TODO - if we have multiple nets we could use
* we may want to put more thought into which we choose
*/
if (checkType == mNetworkPreference) {
newType = checkType;
break;
}
if (mNetAttributes[checkType].mPriority > newPriority) {
newType = checkType;
newPriority = mNetAttributes[newType].mPriority;
}
}
}
if (newType != -1) {
newNet = mNetTrackers[newType];
/**
* See if the other network is available to fail over to.
* If is not available, we enable it anyway, so that it
* will be able to connect when it does become available,
* but we report a total loss of connectivity rather than
* report that we are attempting to fail over.
*/
if (newNet.isAvailable()) {
NetworkInfo switchTo = newNet.getNetworkInfo();
switchTo.setFailover(true);
if (!switchTo.isConnectedOrConnecting() ||
newNet.isTeardownRequested()) {
newNet.reconnect();
}
if (DBG) {
if (switchTo.isConnected()) {
Slog.v(TAG, "Switching to already connected " +
switchTo.getTypeName());
} else {
Slog.v(TAG, "Attempting to switch to " +
switchTo.getTypeName());
}
}
} else {
newNet.reconnect();
newNet = null; // not officially avail.. try anyway, but
// report no failover
}
}
}
return newNet;
}
private void sendConnectedBroadcast(NetworkInfo info) {
Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
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());
}
sendStickyBroadcast(intent);
}
/**
* 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();
if (DBG) {
String reasonText;
if (reason == null) {
reasonText = ".";
} else {
reasonText = " (" + reason + ").";
}
Slog.v(TAG, "Attempt to connect to " + info.getTypeName() +
" failed" + reasonText);
}
Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
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);
}
NetworkStateTracker newNet = null;
if (mNetAttributes[info.getType()].isDefault()) {
newNet = tryFailover(info.getType());
if (newNet != null) {
NetworkInfo switchTo = newNet.getNetworkInfo();
intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, switchTo);
} else {
intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
}
}
// do this before we broadcast the change
handleConnectivityChange();
sendStickyBroadcast(intent);
/*
* If the failover network is already connected, then immediately send
* out a followup broadcast indicating successful failover
*/
if (newNet != null && newNet.getNetworkInfo().isConnected()) {
sendConnectedBroadcast(newNet.getNetworkInfo());
}
}
private void sendStickyBroadcast(Intent intent) {
synchronized(this) {
if (!mSystemReady) {
mInitialBroadcast = new Intent(intent);
}
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
mContext.sendStickyBroadcast(intent);
}
}
void systemReady() {
synchronized(this) {
mSystemReady = true;
if (mInitialBroadcast != null) {
mContext.sendStickyBroadcast(mInitialBroadcast);
mInitialBroadcast = null;
}
}
}
private void handleConnect(NetworkInfo info) {
int type = info.getType();
// snapshot isFailover, because sendConnectedBroadcast() resets it
boolean isFailover = info.isFailover();
NetworkStateTracker thisNet = mNetTrackers[type];
// if this is a default net and other default is running
// kill the one not preferred
if (mNetAttributes[type].isDefault()) {
if (mActiveDefaultNetwork != -1 && mActiveDefaultNetwork != type) {
if ((type != mNetworkPreference &&
mNetAttributes[mActiveDefaultNetwork].mPriority >
mNetAttributes[type].mPriority) ||
mNetworkPreference == mActiveDefaultNetwork) {
// don't accept this one
if (DBG) Slog.v(TAG, "Not broadcasting CONNECT_ACTION " +
"to torn down network " + info.getTypeName());
teardown(thisNet);
return;
} else {
// tear down the other
NetworkStateTracker otherNet =
mNetTrackers[mActiveDefaultNetwork];
if (DBG) Slog.v(TAG, "Policy requires " +
otherNet.getNetworkInfo().getTypeName() +
" teardown");
if (!teardown(otherNet)) {
Slog.e(TAG, "Network declined teardown request");
return;
}
if (isFailover) {
otherNet.releaseWakeLock();
}
}
}
mActiveDefaultNetwork = type;
}
thisNet.setTeardownRequested(false);
thisNet.updateNetworkSettings();
handleConnectivityChange();
sendConnectedBroadcast(info);
}
private void handleScanResultsAvailable(NetworkInfo info) {
int networkType = info.getType();
if (networkType != ConnectivityManager.TYPE_WIFI) {
if (DBG) Slog.v(TAG, "Got ScanResultsAvailable for " +
info.getTypeName() + " network. Don't know how to handle.");
}
mNetTrackers[networkType].interpretScanResultsAvailable();
}
private void handleNotificationChange(boolean visible, int id,
Notification notification) {
NotificationManager notificationManager = (NotificationManager) mContext
.getSystemService(Context.NOTIFICATION_SERVICE);
if (visible) {
notificationManager.notify(id, notification);
} else {
notificationManager.cancel(id);
}
}
/**
* After any kind of change in the connectivity state of any network,
* make sure that anything that depends on the connectivity state of
* more than one network is set up correctly. 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() {
/*
* If a non-default network is enabled, add the host routes that
* will allow it's DNS servers to be accessed. Only
* If both mobile and wifi are enabled, add the host routes that
* will allow MMS traffic to pass on the mobile network. But
* remove the default route for the mobile network, so that there
* will be only one default route, to ensure that all traffic
* except MMS will travel via Wi-Fi.
*/
handleDnsConfigurationChange();
for (int netType : mPriorityList) {
if (mNetTrackers[netType].getNetworkInfo().isConnected()) {
if (mNetAttributes[netType].isDefault()) {
mNetTrackers[netType].addDefaultRoute();
} else {
mNetTrackers[netType].addPrivateDnsRoutes();
}
} else {
if (mNetAttributes[netType].isDefault()) {
mNetTrackers[netType].removeDefaultRoute();
} else {
mNetTrackers[netType].removePrivateDnsRoutes();
}
}
}
}
/**
* 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 (DBG) Slog.d(TAG, "reassessPidDns for pid " + myPid);
for(int i : mPriorityList) {
if (mNetAttributes[i].isDefault()) {
continue;
}
NetworkStateTracker nt = mNetTrackers[i];
if (nt.getNetworkInfo().isConnected() &&
!nt.isTeardownRequested()) {
List pids = mNetRequestersPids[i];
for (int j=0; j<pids.size(); j++) {
Integer pid = (Integer)pids.get(j);
if (pid.intValue() == myPid) {
String[] dnsList = nt.getNameServers();
writePidDns(dnsList, 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, "");
}
}
private void writePidDns(String[] dnsList, int pid) {
int j = 1;
for (String dns : dnsList) {
if (dns != null && !TextUtils.equals(dns, "0.0.0.0")) {
SystemProperties.set("net.dns" + j++ + "." + pid, dns);
}
}
}
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));
}
private void handleDnsConfigurationChange() {
// add default net's dns entries
for (int x = mPriorityList.length-1; x>= 0; x--) {
int netType = mPriorityList[x];
NetworkStateTracker nt = mNetTrackers[netType];
if (nt != null && nt.getNetworkInfo().isConnected() &&
!nt.isTeardownRequested()) {
String[] dnsList = nt.getNameServers();
if (mNetAttributes[netType].isDefault()) {
int j = 1;
for (String dns : dnsList) {
if (dns != null && !TextUtils.equals(dns, "0.0.0.0")) {
if (DBG) {
Slog.d(TAG, "adding dns " + dns + " for " +
nt.getNetworkInfo().getTypeName());
}
SystemProperties.set("net.dns" + j++, dns);
}
}
for (int k=j ; k<mNumDnsEntries; k++) {
if (DBG) Slog.d(TAG, "erasing net.dns" + k);
SystemProperties.set("net.dns" + k, "");
}
mNumDnsEntries = j;
} else {
// 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);
writePidDns(dnsList, pid.intValue());
}
}
}
}
bumpDns();
}
private int getRestoreDefaultNetworkDelay() {
String restoreDefaultNetworkDelayStr = SystemProperties.get(
NETWORK_RESTORE_DELAY_PROP_NAME);
if(restoreDefaultNetworkDelayStr != null &&
restoreDefaultNetworkDelayStr.length() != 0) {
try {
return Integer.valueOf(restoreDefaultNetworkDelayStr);
} catch (NumberFormatException e) {
}
}
return RESTORE_DEFAULT_NETWORK_DELAY;
}
@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();
mTethering.dump(fd, pw, args);
}
// must be stateless - things change under us.
private class MyHandler extends Handler {
@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();
// only do this optimization for wifi. It going into scan mode for location
// services generates alot of noise. Meanwhile the mms apn won't send out
// subsequent notifications when on default cellular because it never
// disconnects.. so only do this to wifi notifications. Fixed better when the
// APN notifications are standardized.
if (mNetAttributes[type].mLastState == state &&
mNetAttributes[type].mRadio == ConnectivityManager.TYPE_WIFI) {
if (DBG) {
// TODO - remove this after we validate the dropping doesn't break
// anything
Slog.d(TAG, "Dropping ConnectivityChange for " +
info.getTypeName() + ": " +
state + "/" + info.getDetailedState());
}
return;
}
mNetAttributes[type].mLastState = state;
if (DBG) Slog.d(TAG, "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_SCAN_RESULTS_AVAILABLE:
info = (NetworkInfo) msg.obj;
handleScanResultsAvailable(info);
break;
case NetworkStateTracker.EVENT_NOTIFICATION_CHANGED:
handleNotificationChange(msg.arg1 == 1, msg.arg2,
(Notification) msg.obj);
case NetworkStateTracker.EVENT_CONFIGURATION_CHANGED:
handleDnsConfigurationChange();
break;
case NetworkStateTracker.EVENT_ROAMING_CHANGED:
// fill me in
break;
case NetworkStateTracker.EVENT_NETWORK_SUBTYPE_CHANGED:
// fill me in
break;
case NetworkStateTracker.EVENT_RESTORE_DEFAULT_NETWORK:
FeatureUser u = (FeatureUser)msg.obj;
u.expire();
break;
}
}
}
// 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];
}
}
// 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();
}
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;
}
}