Google Git
Sign in
android / platform / frameworks / base / a45746e / . / wifi / java / android / net / wifi / WifiStateMachine.java
blob: 7e47c99ab78beaa1dd1362e67bbf1c834bc0ce0b [file] [log] [blame]
/*
* Copyright (C) 2010 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 android.net.wifi;
import static android.net.wifi.WifiManager.WIFI_STATE_DISABLED;
import static android.net.wifi.WifiManager.WIFI_STATE_DISABLING;
import static android.net.wifi.WifiManager.WIFI_STATE_ENABLED;
import static android.net.wifi.WifiManager.WIFI_STATE_ENABLING;
import static android.net.wifi.WifiManager.WIFI_STATE_UNKNOWN;
/**
* TODO: Add soft AP states as part of WIFI_STATE_XXX
* Retain WIFI_STATE_ENABLING that indicates driver is loading
* Add WIFI_STATE_AP_ENABLED to indicate soft AP has started
* and WIFI_STATE_FAILED for failure
* Deprecate WIFI_STATE_UNKNOWN
*
* Doing this will simplify the logic for sending broadcasts
*/
import static android.net.wifi.WifiManager.WIFI_AP_STATE_DISABLED;
import static android.net.wifi.WifiManager.WIFI_AP_STATE_DISABLING;
import static android.net.wifi.WifiManager.WIFI_AP_STATE_ENABLED;
import static android.net.wifi.WifiManager.WIFI_AP_STATE_ENABLING;
import static android.net.wifi.WifiManager.WIFI_AP_STATE_FAILED;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.backup.IBackupManager;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.DhcpInfo;
import android.net.DhcpInfoInternal;
import android.net.DhcpStateMachine;
import android.net.InterfaceConfiguration;
import android.net.LinkAddress;
import android.net.LinkProperties;
import android.net.NetworkInfo;
import android.net.NetworkInfo.DetailedState;
import android.net.NetworkUtils;
import android.net.wifi.WpsResult.Status;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pService;
import android.net.wifi.StateChangeResult;
import android.os.Binder;
import android.os.IBinder;
import android.os.INetworkManagementService;
import android.os.Message;
import android.os.Messenger;
import android.os.PowerManager;
import android.os.Process;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.WorkSource;
import android.provider.Settings;
import android.util.EventLog;
import android.util.Log;
import android.util.LruCache;
import com.android.internal.app.IBatteryStats;
import com.android.internal.util.AsyncChannel;
import com.android.internal.util.Protocol;
import com.android.internal.util.State;
import com.android.internal.util.StateMachine;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.regex.Pattern;
/**
* Track the state of Wifi connectivity. All event handling is done here,
* and all changes in connectivity state are initiated here.
*
* Wi-Fi now supports three modes of operation: Client, Soft Ap and Direct
* In the current implementation, we do not support any concurrency and thus only
* one of Client, Soft Ap or Direct operation is supported at any time.
*
* The WifiStateMachine supports Soft Ap and Client operations while WifiP2pService
* handles Direct. WifiP2pService and WifiStateMachine co-ordinate to ensure only
* one exists at a certain time.
*
* @hide
*/
public class WifiStateMachine extends StateMachine {
private static final String TAG = "WifiStateMachine";
private static final String NETWORKTYPE = "WIFI";
private static final boolean DBG = false;
/* TODO: This is no more used with the hostapd code. Clean up */
private static final String SOFTAP_IFACE = "wl0.1";
private WifiMonitor mWifiMonitor;
private WifiNative mWifiNative;
private WifiConfigStore mWifiConfigStore;
private INetworkManagementService mNwService;
private ConnectivityManager mCm;
private final boolean mP2pSupported;
private final String mPrimaryDeviceType;
/* Scan results handling */
private List<ScanResult> mScanResults;
private static final Pattern scanResultPattern = Pattern.compile("\t+");
private static final int SCAN_RESULT_CACHE_SIZE = 80;
private final LruCache<String, ScanResult> mScanResultCache;
/* Chipset supports background scan */
private final boolean mBackgroundScanSupported;
private String mInterfaceName;
/* Tethering interface could be seperate from wlan interface */
private String mTetherInterfaceName;
private int mLastSignalLevel = -1;
private String mLastBssid;
private int mLastNetworkId;
private boolean mEnableRssiPolling = false;
private boolean mEnableBackgroundScan = false;
private int mRssiPollToken = 0;
private int mReconnectCount = 0;
private boolean mIsScanMode = false;
private boolean mScanResultIsPending = false;
/* Tracks if the current scan settings are active */
private boolean mSetScanActive = false;
/* High perf mode is true if an app has held a high perf Wifi Lock */
private boolean mHighPerfMode = false;
private boolean mBluetoothConnectionActive = false;
private BroadcastReceiver mScreenReceiver;
private IntentFilter mScreenFilter;
private PowerManager.WakeLock mSuspendWakeLock;
/**
* Interval in milliseconds between polling for RSSI
* and linkspeed information
*/
private static final int POLL_RSSI_INTERVAL_MSECS = 3000;
/**
* Delay between supplicant restarts upon failure to establish connection
*/
private static final int SUPPLICANT_RESTART_INTERVAL_MSECS = 5000;
/**
* Number of times we attempt to restart supplicant
*/
private static final int SUPPLICANT_RESTART_TRIES = 5;
private int mSupplicantRestartCount = 0;
/* Tracks sequence number on stop failure message */
private int mSupplicantStopFailureToken = 0;
/**
* Tether state change notification time out
*/
private static final int TETHER_NOTIFICATION_TIME_OUT_MSECS = 5000;
/* Tracks sequence number on a tether notification time out */
private int mTetherToken = 0;
/**
* Driver start time out.
*/
private static final int DRIVER_START_TIME_OUT_MSECS = 10000;
/* Tracks sequence number on a driver time out */
private int mDriverStartToken = 0;
private LinkProperties mLinkProperties;
/* Tracks sequence number on a periodic scan message */
private int mPeriodicScanToken = 0;
// Wakelock held during wifi start/stop and driver load/unload
private PowerManager.WakeLock mWakeLock;
private Context mContext;
private DhcpInfoInternal mDhcpInfoInternal;
private WifiInfo mWifiInfo;
private NetworkInfo mNetworkInfo;
private SupplicantStateTracker mSupplicantStateTracker;
private DhcpStateMachine mDhcpStateMachine;
private AlarmManager mAlarmManager;
private PendingIntent mScanIntent;
private PendingIntent mDriverStopIntent;
/* Tracks current frequency mode */
private AtomicInteger mFrequencyBand = new AtomicInteger(WifiManager.WIFI_FREQUENCY_BAND_AUTO);
/* Tracks if we are filtering Multicast v4 packets. Default is to filter. */
private AtomicBoolean mFilteringMulticastV4Packets = new AtomicBoolean(true);
// Channel for sending replies.
private AsyncChannel mReplyChannel = new AsyncChannel();
private WifiP2pManager mWifiP2pManager;
//Used to initiate a connection with WifiP2pService
private AsyncChannel mWifiP2pChannel = new AsyncChannel();
private AsyncChannel mWifiApConfigChannel = new AsyncChannel();
// Event log tags (must be in sync with event-log-tags)
private static final int EVENTLOG_WIFI_STATE_CHANGED = 50021;
private static final int EVENTLOG_WIFI_EVENT_HANDLED = 50022;
private static final int EVENTLOG_SUPPLICANT_STATE_CHANGED = 50023;
/* The base for wifi message types */
static final int BASE = Protocol.BASE_WIFI;
/* Load the driver */
static final int CMD_LOAD_DRIVER = BASE + 1;
/* Unload the driver */
static final int CMD_UNLOAD_DRIVER = BASE + 2;
/* Indicates driver load succeeded */
static final int CMD_LOAD_DRIVER_SUCCESS = BASE + 3;
/* Indicates driver load failed */
static final int CMD_LOAD_DRIVER_FAILURE = BASE + 4;
/* Indicates driver unload succeeded */
static final int CMD_UNLOAD_DRIVER_SUCCESS = BASE + 5;
/* Indicates driver unload failed */
static final int CMD_UNLOAD_DRIVER_FAILURE = BASE + 6;
/* Start the supplicant */
static final int CMD_START_SUPPLICANT = BASE + 11;
/* Stop the supplicant */
static final int CMD_STOP_SUPPLICANT = BASE + 12;
/* Start the driver */
static final int CMD_START_DRIVER = BASE + 13;
/* Stop the driver */
static final int CMD_STOP_DRIVER = BASE + 14;
/* Indicates Static IP succeded */
static final int CMD_STATIC_IP_SUCCESS = BASE + 15;
/* Indicates Static IP failed */
static final int CMD_STATIC_IP_FAILURE = BASE + 16;
/* Indicates supplicant stop failed */
static final int CMD_STOP_SUPPLICANT_FAILED = BASE + 17;
/* Delayed stop to avoid shutting down driver too quick*/
static final int CMD_DELAYED_STOP_DRIVER = BASE + 18;
/* A delayed message sent to start driver when it fail to come up */
static final int CMD_DRIVER_START_TIMED_OUT = BASE + 19;
/* Start the soft access point */
static final int CMD_START_AP = BASE + 21;
/* Indicates soft ap start succeded */
static final int CMD_START_AP_SUCCESS = BASE + 22;
/* Indicates soft ap start failed */
static final int CMD_START_AP_FAILURE = BASE + 23;
/* Stop the soft access point */
static final int CMD_STOP_AP = BASE + 24;
/* Set the soft access point configuration */
static final int CMD_SET_AP_CONFIG = BASE + 25;
/* Soft access point configuration set completed */
static final int CMD_SET_AP_CONFIG_COMPLETED = BASE + 26;
/* Request the soft access point configuration */
static final int CMD_REQUEST_AP_CONFIG = BASE + 27;
/* Response to access point configuration request */
static final int CMD_RESPONSE_AP_CONFIG = BASE + 28;
/* Invoked when getting a tether state change notification */
static final int CMD_TETHER_STATE_CHANGE = BASE + 29;
/* A delayed message sent to indicate tether state change failed to arrive */
static final int CMD_TETHER_NOTIFICATION_TIMED_OUT = BASE + 30;
static final int CMD_BLUETOOTH_ADAPTER_STATE_CHANGE = BASE + 31;
/* Supplicant commands */
/* Is supplicant alive ? */
static final int CMD_PING_SUPPLICANT = BASE + 51;
/* Add/update a network configuration */
static final int CMD_ADD_OR_UPDATE_NETWORK = BASE + 52;
/* Delete a network */
static final int CMD_REMOVE_NETWORK = BASE + 53;
/* Enable a network. The device will attempt a connection to the given network. */
static final int CMD_ENABLE_NETWORK = BASE + 54;
/* Enable all networks */
static final int CMD_ENABLE_ALL_NETWORKS = BASE + 55;
/* Blacklist network. De-prioritizes the given BSSID for connection. */
static final int CMD_BLACKLIST_NETWORK = BASE + 56;
/* Clear the blacklist network list */
static final int CMD_CLEAR_BLACKLIST = BASE + 57;
/* Save configuration */
static final int CMD_SAVE_CONFIG = BASE + 58;
/* Get configured networks*/
static final int CMD_GET_CONFIGURED_NETWORKS = BASE + 59;
/* Supplicant commands after driver start*/
/* Initiate a scan */
static final int CMD_START_SCAN = BASE + 71;
/* Set scan mode. CONNECT_MODE or SCAN_ONLY_MODE */
static final int CMD_SET_SCAN_MODE = BASE + 72;
/* Set scan type. SCAN_ACTIVE or SCAN_PASSIVE */
static final int CMD_SET_SCAN_TYPE = BASE + 73;
/* Disconnect from a network */
static final int CMD_DISCONNECT = BASE + 74;
/* Reconnect to a network */
static final int CMD_RECONNECT = BASE + 75;
/* Reassociate to a network */
static final int CMD_REASSOCIATE = BASE + 76;
/* Controls suspend mode optimizations
*
* When high perf mode is enabled, suspend mode optimizations are disabled
*
* When high perf mode is disabled, suspend mode optimizations are enabled
*
* Suspend mode optimizations include:
* - packet filtering
* - turn off roaming
* - DTIM wake up settings
*/
static final int CMD_SET_HIGH_PERF_MODE = BASE + 77;
/* Set the country code */
static final int CMD_SET_COUNTRY_CODE = BASE + 80;
/* Enables RSSI poll */
static final int CMD_ENABLE_RSSI_POLL = BASE + 82;
/* RSSI poll */
static final int CMD_RSSI_POLL = BASE + 83;
/* Set up packet filtering */
static final int CMD_START_PACKET_FILTERING = BASE + 84;
/* Clear packet filter */
static final int CMD_STOP_PACKET_FILTERING = BASE + 85;
/* Set suspend mode optimizations in the driver */
static final int CMD_SET_SUSPEND_OPTIMIZATIONS = BASE + 86;
/* Clear suspend mode optimizations in the driver */
static final int CMD_CLEAR_SUSPEND_OPTIMIZATIONS = BASE + 87;
/* When there are no saved networks, we do a periodic scan to notify user of
* an open network */
static final int CMD_NO_NETWORKS_PERIODIC_SCAN = BASE + 88;
/* arg1 values to CMD_STOP_PACKET_FILTERING and CMD_START_PACKET_FILTERING */
static final int MULTICAST_V6 = 1;
static final int MULTICAST_V4 = 0;
/* Set the frequency band */
static final int CMD_SET_FREQUENCY_BAND = BASE + 90;
/* Enable background scan for configured networks */
static final int CMD_ENABLE_BACKGROUND_SCAN = BASE + 91;
/* Commands from/to the SupplicantStateTracker */
/* Reset the supplicant state tracker */
static final int CMD_RESET_SUPPLICANT_STATE = BASE + 111;
/* P2p commands */
public static final int CMD_ENABLE_P2P = BASE + 131;
public static final int CMD_DISABLE_P2P = BASE + 132;
private static final int CONNECT_MODE = 1;
private static final int SCAN_ONLY_MODE = 2;
private static final int SCAN_ACTIVE = 1;
private static final int SCAN_PASSIVE = 2;
private static final int SUCCESS = 1;
private static final int FAILURE = -1;
/* Phone in emergency call back mode */
private static final int IN_ECM_STATE = 1;
private static final int NOT_IN_ECM_STATE = 0;
/**
* The maximum number of times we will retry a connection to an access point
* for which we have failed in acquiring an IP address from DHCP. A value of
* N means that we will make N+1 connection attempts in all.
* <p>
* See {@link Settings.Secure#WIFI_MAX_DHCP_RETRY_COUNT}. This is the default
* value if a Settings value is not present.
*/
private static final int DEFAULT_MAX_DHCP_RETRIES = 9;
/* Tracks if power save is enabled in driver */
private boolean mPowerSaveEnabled = true;;
/**
* Default framework scan interval in milliseconds. This is used in the scenario in which
* wifi chipset does not support background scanning to set up a
* periodic wake up scan so that the device can connect to a new access
* point on the move. {@link Settings.Secure#WIFI_FRAMEWORK_SCAN_INTERVAL_MS} can
* override this.
*/
private final int mDefaultFrameworkScanIntervalMs;
/**
* Supplicant scan interval in milliseconds.
* Comes from {@link Settings.Secure#WIFI_SUPPLICANT_SCAN_INTERVAL_MS} or
* from the default config if the setting is not set
*/
private long mSupplicantScanIntervalMs;
/**
* Minimum time interval between enabling all networks.
* A device can end up repeatedly connecting to a bad network on screen on/off toggle
* due to enabling every time. We add a threshold to avoid this.
*/
private static final int MIN_INTERVAL_ENABLE_ALL_NETWORKS_MS = 10 * 60 * 1000; /* 10 minutes */
private long mLastEnableAllNetworksTime;
/**
* Starting and shutting down driver too quick causes problems leading to driver
* being in a bad state. Delay driver stop.
*/
private final int mDriverStopDelayMs;
private int mDelayedStopCounter;
private boolean mInDelayedStop = false;
private static final int MIN_RSSI = -200;
private static final int MAX_RSSI = 256;
/* Default parent state */
private State mDefaultState = new DefaultState();
/* Temporary initial state */
private State mInitialState = new InitialState();
/* Unloading the driver */
private State mDriverUnloadingState = new DriverUnloadingState();
/* Loading the driver */
private State mDriverUnloadedState = new DriverUnloadedState();
/* Driver load/unload failed */
private State mDriverFailedState = new DriverFailedState();
/* Driver loading */
private State mDriverLoadingState = new DriverLoadingState();
/* Driver loaded */
private State mDriverLoadedState = new DriverLoadedState();
/* Driver loaded, waiting for supplicant to start */
private State mSupplicantStartingState = new SupplicantStartingState();
/* Driver loaded and supplicant ready */
private State mSupplicantStartedState = new SupplicantStartedState();
/* Waiting for supplicant to stop and monitor to exit */
private State mSupplicantStoppingState = new SupplicantStoppingState();
/* Driver start issued, waiting for completed event */
private State mDriverStartingState = new DriverStartingState();
/* Driver started */
private State mDriverStartedState = new DriverStartedState();
/* Driver stopping */
private State mDriverStoppingState = new DriverStoppingState();
/* Driver stopped */
private State mDriverStoppedState = new DriverStoppedState();
/* Scan for networks, no connection will be established */
private State mScanModeState = new ScanModeState();
/* Connecting to an access point */
private State mConnectModeState = new ConnectModeState();
/* Connected at 802.11 (L2) level */
private State mL2ConnectedState = new L2ConnectedState();
/* fetching IP after connection to access point (assoc+auth complete) */
private State mObtainingIpState = new ObtainingIpState();
/* Waiting for link quality verification to be complete */
private State mVerifyingLinkState = new VerifyingLinkState();
/* Connected with IP addr */
private State mConnectedState = new ConnectedState();
/* disconnect issued, waiting for network disconnect confirmation */
private State mDisconnectingState = new DisconnectingState();
/* Network is not connected, supplicant assoc+auth is not complete */
private State mDisconnectedState = new DisconnectedState();
/* Waiting for WPS to be completed*/
private State mWpsRunningState = new WpsRunningState();
/* Soft ap is starting up */
private State mSoftApStartingState = new SoftApStartingState();
/* Soft ap is running */
private State mSoftApStartedState = new SoftApStartedState();
/* Soft ap is running and we are waiting for tether notification */
private State mTetheringState = new TetheringState();
/* Soft ap is running and we are tethered through connectivity service */
private State mTetheredState = new TetheredState();
/* Waiting for untether confirmation to stop soft Ap */
private State mSoftApStoppingState = new SoftApStoppingState();
private class TetherStateChange {
ArrayList<String> available;
ArrayList<String> active;
TetherStateChange(ArrayList<String> av, ArrayList<String> ac) {
available = av;
active = ac;
}
}
/**
* One of {@link WifiManager#WIFI_STATE_DISABLED},
* {@link WifiManager#WIFI_STATE_DISABLING},
* {@link WifiManager#WIFI_STATE_ENABLED},
* {@link WifiManager#WIFI_STATE_ENABLING},
* {@link WifiManager#WIFI_STATE_UNKNOWN}
*
*/
private final AtomicInteger mWifiState = new AtomicInteger(WIFI_STATE_DISABLED);
/**
* One of {@link WifiManager#WIFI_AP_STATE_DISABLED},
* {@link WifiManager#WIFI_AP_STATE_DISABLING},
* {@link WifiManager#WIFI_AP_STATE_ENABLED},
* {@link WifiManager#WIFI_AP_STATE_ENABLING},
* {@link WifiManager#WIFI_AP_STATE_FAILED}
*
*/
private final AtomicInteger mWifiApState = new AtomicInteger(WIFI_AP_STATE_DISABLED);
private final AtomicInteger mLastEnableUid = new AtomicInteger(Process.myUid());
private final AtomicInteger mLastApEnableUid = new AtomicInteger(Process.myUid());
private static final int SCAN_REQUEST = 0;
private static final String ACTION_START_SCAN =
"com.android.server.WifiManager.action.START_SCAN";
private static final String DELAYED_STOP_COUNTER = "DelayedStopCounter";
private static final int DRIVER_STOP_REQUEST = 0;
private static final String ACTION_DELAYED_DRIVER_STOP =
"com.android.server.WifiManager.action.DELAYED_DRIVER_STOP";
/**
* Keep track of whether WIFI is running.
*/
private boolean mIsRunning = false;
/**
* Keep track of whether we last told the battery stats we had started.
*/
private boolean mReportedRunning = false;
/**
* Most recently set source of starting WIFI.
*/
private final WorkSource mRunningWifiUids = new WorkSource();
/**
* The last reported UIDs that were responsible for starting WIFI.
*/
private final WorkSource mLastRunningWifiUids = new WorkSource();
private final IBatteryStats mBatteryStats;
public WifiStateMachine(Context context, String wlanInterface) {
super(TAG);
mContext = context;
mInterfaceName = wlanInterface;
mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_WIFI, 0, NETWORKTYPE, "");
mBatteryStats = IBatteryStats.Stub.asInterface(ServiceManager.getService("batteryinfo"));
IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE);
mNwService = INetworkManagementService.Stub.asInterface(b);
mP2pSupported = mContext.getPackageManager().hasSystemFeature(
PackageManager.FEATURE_WIFI_DIRECT);
mWifiNative = new WifiNative(mInterfaceName);
mWifiConfigStore = new WifiConfigStore(context, mWifiNative);
mWifiMonitor = new WifiMonitor(this, mWifiNative);
mDhcpInfoInternal = new DhcpInfoInternal();
mWifiInfo = new WifiInfo();
mSupplicantStateTracker = new SupplicantStateTracker(context, this, mWifiConfigStore,
getHandler());
mLinkProperties = new LinkProperties();
WifiApConfigStore wifiApConfigStore = WifiApConfigStore.makeWifiApConfigStore(
context, getHandler());
wifiApConfigStore.loadApConfiguration();
mWifiApConfigChannel.connectSync(mContext, getHandler(), wifiApConfigStore.getMessenger());
mNetworkInfo.setIsAvailable(false);
mLinkProperties.clear();
mLastBssid = null;
mLastNetworkId = WifiConfiguration.INVALID_NETWORK_ID;
mLastSignalLevel = -1;
mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);
Intent scanIntent = new Intent(ACTION_START_SCAN, null);
mScanIntent = PendingIntent.getBroadcast(mContext, SCAN_REQUEST, scanIntent, 0);
mDefaultFrameworkScanIntervalMs = mContext.getResources().getInteger(
com.android.internal.R.integer.config_wifi_framework_scan_interval);
mDriverStopDelayMs = mContext.getResources().getInteger(
com.android.internal.R.integer.config_wifi_driver_stop_delay);
mBackgroundScanSupported = mContext.getResources().getBoolean(
com.android.internal.R.bool.config_wifi_background_scan_support);
mPrimaryDeviceType = mContext.getResources().getString(
com.android.internal.R.string.config_wifi_p2p_device_type);
mContext.registerReceiver(
new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
ArrayList<String> available = intent.getStringArrayListExtra(
ConnectivityManager.EXTRA_AVAILABLE_TETHER);
ArrayList<String> active = intent.getStringArrayListExtra(
ConnectivityManager.EXTRA_ACTIVE_TETHER);
sendMessage(CMD_TETHER_STATE_CHANGE, new TetherStateChange(available, active));
}
},new IntentFilter(ConnectivityManager.ACTION_TETHER_STATE_CHANGED));
mContext.registerReceiver(
new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
startScan(false);
}
},
new IntentFilter(ACTION_START_SCAN));
mScreenFilter = new IntentFilter();
mScreenFilter.addAction(Intent.ACTION_SCREEN_ON);
mScreenFilter.addAction(Intent.ACTION_SCREEN_OFF);
mScreenReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(Intent.ACTION_SCREEN_ON)) {
enableRssiPolling(true);
if (mBackgroundScanSupported) {
enableBackgroundScanCommand(false);
}
enableAllNetworks();
sendMessage(CMD_CLEAR_SUSPEND_OPTIMIZATIONS);
} else if (action.equals(Intent.ACTION_SCREEN_OFF)) {
enableRssiPolling(false);
if (mBackgroundScanSupported) {
enableBackgroundScanCommand(true);
}
//Allow 2s for suspend optimizations to be set
mSuspendWakeLock.acquire(2000);
sendMessage(CMD_SET_SUSPEND_OPTIMIZATIONS);
}
}
};
mContext.registerReceiver(
new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
int counter = intent.getIntExtra(DELAYED_STOP_COUNTER, 0);
sendMessage(obtainMessage(CMD_DELAYED_STOP_DRIVER, counter, 0));
}
},
new IntentFilter(ACTION_DELAYED_DRIVER_STOP));
mScanResultCache = new LruCache<String, ScanResult>(SCAN_RESULT_CACHE_SIZE);
PowerManager powerManager = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
mWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
mSuspendWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WifiSuspend");
mSuspendWakeLock.setReferenceCounted(false);
addState(mDefaultState);
addState(mInitialState, mDefaultState);
addState(mDriverUnloadingState, mDefaultState);
addState(mDriverUnloadedState, mDefaultState);
addState(mDriverFailedState, mDriverUnloadedState);
addState(mDriverLoadingState, mDefaultState);
addState(mDriverLoadedState, mDefaultState);
addState(mSupplicantStartingState, mDefaultState);
addState(mSupplicantStartedState, mDefaultState);
addState(mDriverStartingState, mSupplicantStartedState);
addState(mDriverStartedState, mSupplicantStartedState);
addState(mScanModeState, mDriverStartedState);
addState(mConnectModeState, mDriverStartedState);
addState(mL2ConnectedState, mConnectModeState);
addState(mObtainingIpState, mL2ConnectedState);
addState(mVerifyingLinkState, mL2ConnectedState);
addState(mConnectedState, mL2ConnectedState);
addState(mDisconnectingState, mConnectModeState);
addState(mDisconnectedState, mConnectModeState);
addState(mWpsRunningState, mConnectModeState);
addState(mDriverStoppingState, mSupplicantStartedState);
addState(mDriverStoppedState, mSupplicantStartedState);
addState(mSupplicantStoppingState, mDefaultState);
addState(mSoftApStartingState, mDefaultState);
addState(mSoftApStartedState, mDefaultState);
addState(mTetheringState, mSoftApStartedState);
addState(mTetheredState, mSoftApStartedState);
addState(mSoftApStoppingState, mDefaultState);
setInitialState(mInitialState);
setProcessedMessagesSize(100);
if (DBG) setDbg(true);
//start the state machine
start();
}
/*********************************************************
* Methods exposed for public use
********************************************************/
public Messenger getMessenger() {
return new Messenger(getHandler());
}
/**
* TODO: doc
*/
public boolean syncPingSupplicant(AsyncChannel channel) {
Message resultMsg = channel.sendMessageSynchronously(CMD_PING_SUPPLICANT);
boolean result = (resultMsg.arg1 != FAILURE);
resultMsg.recycle();
return result;
}
/**
* TODO: doc
*/
public void startScan(boolean forceActive) {
sendMessage(obtainMessage(CMD_START_SCAN, forceActive ?
SCAN_ACTIVE : SCAN_PASSIVE, 0));
}
/**
* TODO: doc
*/
public void setWifiEnabled(boolean enable) {
mLastEnableUid.set(Binder.getCallingUid());
if (enable) {
/* Argument is the state that is entered prior to load */
sendMessage(obtainMessage(CMD_LOAD_DRIVER, WIFI_STATE_ENABLING, 0));
sendMessage(CMD_START_SUPPLICANT);
} else {
sendMessage(CMD_STOP_SUPPLICANT);
/* Argument is the state that is entered upon success */
sendMessage(obtainMessage(CMD_UNLOAD_DRIVER, WIFI_STATE_DISABLED, 0));
}
}
/**
* TODO: doc
*/
public void setWifiApEnabled(WifiConfiguration wifiConfig, boolean enable) {
mLastApEnableUid.set(Binder.getCallingUid());
if (enable) {
/* Argument is the state that is entered prior to load */
sendMessage(obtainMessage(CMD_LOAD_DRIVER, WIFI_AP_STATE_ENABLING, 0));
sendMessage(obtainMessage(CMD_START_AP, wifiConfig));
} else {
sendMessage(CMD_STOP_AP);
/* Argument is the state that is entered upon success */
sendMessage(obtainMessage(CMD_UNLOAD_DRIVER, WIFI_AP_STATE_DISABLED, 0));
}
}
public void setWifiApConfiguration(WifiConfiguration config) {
mWifiApConfigChannel.sendMessage(CMD_SET_AP_CONFIG, config);
}
public WifiConfiguration syncGetWifiApConfiguration() {
Message resultMsg = mWifiApConfigChannel.sendMessageSynchronously(CMD_REQUEST_AP_CONFIG);
WifiConfiguration ret = (WifiConfiguration) resultMsg.obj;
resultMsg.recycle();
return ret;
}
/**
* TODO: doc
*/
public int syncGetWifiState() {
return mWifiState.get();
}
/**
* TODO: doc
*/
public String syncGetWifiStateByName() {
switch (mWifiState.get()) {
case WIFI_STATE_DISABLING:
return "disabling";
case WIFI_STATE_DISABLED:
return "disabled";
case WIFI_STATE_ENABLING:
return "enabling";
case WIFI_STATE_ENABLED:
return "enabled";
case WIFI_STATE_UNKNOWN:
return "unknown state";
default:
return "[invalid state]";
}
}
/**
* TODO: doc
*/
public int syncGetWifiApState() {
return mWifiApState.get();
}
/**
* TODO: doc
*/
public String syncGetWifiApStateByName() {
switch (mWifiApState.get()) {
case WIFI_AP_STATE_DISABLING:
return "disabling";
case WIFI_AP_STATE_DISABLED:
return "disabled";
case WIFI_AP_STATE_ENABLING:
return "enabling";
case WIFI_AP_STATE_ENABLED:
return "enabled";
case WIFI_AP_STATE_FAILED:
return "failed";
default:
return "[invalid state]";
}
}
/**
* Get status information for the current connection, if any.
* @return a {@link WifiInfo} object containing information about the current connection
*
*/
public WifiInfo syncRequestConnectionInfo() {
return mWifiInfo;
}
public DhcpInfo syncGetDhcpInfo() {
synchronized (mDhcpInfoInternal) {
return mDhcpInfoInternal.makeDhcpInfo();
}
}
/**
* TODO: doc
*/
public void setDriverStart(boolean enable, boolean ecm) {
if (enable) {
sendMessage(CMD_START_DRIVER);
} else {
sendMessage(obtainMessage(CMD_STOP_DRIVER, ecm ? IN_ECM_STATE : NOT_IN_ECM_STATE, 0));
}
}
/**
* TODO: doc
*/
public void setScanOnlyMode(boolean enable) {
if (enable) {
sendMessage(obtainMessage(CMD_SET_SCAN_MODE, SCAN_ONLY_MODE, 0));
} else {
sendMessage(obtainMessage(CMD_SET_SCAN_MODE, CONNECT_MODE, 0));
}
}
/**
* TODO: doc
*/
public void setScanType(boolean active) {
if (active) {
sendMessage(obtainMessage(CMD_SET_SCAN_TYPE, SCAN_ACTIVE, 0));
} else {
sendMessage(obtainMessage(CMD_SET_SCAN_TYPE, SCAN_PASSIVE, 0));
}
}
/**
* TODO: doc
*/
public List<ScanResult> syncGetScanResultsList() {
return mScanResults;
}
/**
* Disconnect from Access Point
*/
public void disconnectCommand() {
sendMessage(CMD_DISCONNECT);
}
/**
* Initiate a reconnection to AP
*/
public void reconnectCommand() {
sendMessage(CMD_RECONNECT);
}
/**
* Initiate a re-association to AP
*/
public void reassociateCommand() {
sendMessage(CMD_REASSOCIATE);
}
/**
* Add a network synchronously
*
* @return network id of the new network
*/
public int syncAddOrUpdateNetwork(AsyncChannel channel, WifiConfiguration config) {
Message resultMsg = channel.sendMessageSynchronously(CMD_ADD_OR_UPDATE_NETWORK, config);
int result = resultMsg.arg1;
resultMsg.recycle();
return result;
}
public List<WifiConfiguration> syncGetConfiguredNetworks(AsyncChannel channel) {
Message resultMsg = channel.sendMessageSynchronously(CMD_GET_CONFIGURED_NETWORKS);
List<WifiConfiguration> result = (List<WifiConfiguration>) resultMsg.obj;
resultMsg.recycle();
return result;
}
/**
* Delete a network
*
* @param networkId id of the network to be removed
*/
public boolean syncRemoveNetwork(AsyncChannel channel, int networkId) {
Message resultMsg = channel.sendMessageSynchronously(CMD_REMOVE_NETWORK, networkId);
boolean result = (resultMsg.arg1 != FAILURE);
resultMsg.recycle();
return result;
}
/**
* Enable a network
*
* @param netId network id of the network
* @param disableOthers true, if all other networks have to be disabled
* @return {@code true} if the operation succeeds, {@code false} otherwise
*/
public boolean syncEnableNetwork(AsyncChannel channel, int netId, boolean disableOthers) {
Message resultMsg = channel.sendMessageSynchronously(CMD_ENABLE_NETWORK, netId,
disableOthers ? 1 : 0);
boolean result = (resultMsg.arg1 != FAILURE);
resultMsg.recycle();
return result;
}
/**
* Disable a network
*
* @param netId network id of the network
* @return {@code true} if the operation succeeds, {@code false} otherwise
*/
public boolean syncDisableNetwork(AsyncChannel channel, int netId) {
Message resultMsg = channel.sendMessageSynchronously(WifiManager.DISABLE_NETWORK, netId);
boolean result = (resultMsg.arg1 != WifiManager.DISABLE_NETWORK_FAILED);
resultMsg.recycle();
return result;
}
/**
* Blacklist a BSSID. This will avoid the AP if there are
* alternate APs to connect
*
* @param bssid BSSID of the network
*/
public void addToBlacklist(String bssid) {
sendMessage(obtainMessage(CMD_BLACKLIST_NETWORK, bssid));
}
/**
* Clear the blacklist list
*
*/
public void clearBlacklist() {
sendMessage(obtainMessage(CMD_CLEAR_BLACKLIST));
}
public void enableRssiPolling(boolean enabled) {
sendMessage(obtainMessage(CMD_ENABLE_RSSI_POLL, enabled ? 1 : 0, 0));
}
public void enableBackgroundScanCommand(boolean enabled) {
sendMessage(obtainMessage(CMD_ENABLE_BACKGROUND_SCAN, enabled ? 1 : 0, 0));
}
public void enableAllNetworks() {
sendMessage(CMD_ENABLE_ALL_NETWORKS);
}
/**
* Start filtering Multicast v4 packets
*/
public void startFilteringMulticastV4Packets() {
mFilteringMulticastV4Packets.set(true);
sendMessage(obtainMessage(CMD_START_PACKET_FILTERING, MULTICAST_V4, 0));
}
/**
* Stop filtering Multicast v4 packets
*/
public void stopFilteringMulticastV4Packets() {
mFilteringMulticastV4Packets.set(false);
sendMessage(obtainMessage(CMD_STOP_PACKET_FILTERING, MULTICAST_V4, 0));
}
/**
* Start filtering Multicast v4 packets
*/
public void startFilteringMulticastV6Packets() {
sendMessage(obtainMessage(CMD_START_PACKET_FILTERING, MULTICAST_V6, 0));
}
/**
* Stop filtering Multicast v4 packets
*/
public void stopFilteringMulticastV6Packets() {
sendMessage(obtainMessage(CMD_STOP_PACKET_FILTERING, MULTICAST_V6, 0));
}
/**
* Set high performance mode of operation.
* Enabling would set active power mode and disable suspend optimizations;
* disabling would set auto power mode and enable suspend optimizations
* @param enable true if enable, false otherwise
*/
public void setHighPerfModeEnabled(boolean enable) {
sendMessage(obtainMessage(CMD_SET_HIGH_PERF_MODE, enable ? 1 : 0, 0));
}
/**
* Set the country code
* @param countryCode following ISO 3166 format
* @param persist {@code true} if the setting should be remembered.
*/
public void setCountryCode(String countryCode, boolean persist) {
if (persist) {
Settings.Secure.putString(mContext.getContentResolver(),
Settings.Secure.WIFI_COUNTRY_CODE,
countryCode);
}
sendMessage(obtainMessage(CMD_SET_COUNTRY_CODE, countryCode));
}
/**
* Set the operational frequency band
* @param band
* @param persist {@code true} if the setting should be remembered.
*/
public void setFrequencyBand(int band, boolean persist) {
if (persist) {
Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.WIFI_FREQUENCY_BAND,
band);
}
sendMessage(obtainMessage(CMD_SET_FREQUENCY_BAND, band, 0));
}
/**
* Returns the operational frequency band
*/
public int getFrequencyBand() {
return mFrequencyBand.get();
}
/**
* Returns the wifi configuration file
*/
public String getConfigFile() {
return mWifiConfigStore.getConfigFile();
}
/**
* Send a message indicating bluetooth adapter connection state changed
*/
public void sendBluetoothAdapterStateChange(int state) {
sendMessage(obtainMessage(CMD_BLUETOOTH_ADAPTER_STATE_CHANGE, state, 0));
}
/**
* Save configuration on supplicant
*
* @return {@code true} if the operation succeeds, {@code false} otherwise
*
* TODO: deprecate this
*/
public boolean syncSaveConfig(AsyncChannel channel) {
Message resultMsg = channel.sendMessageSynchronously(CMD_SAVE_CONFIG);
boolean result = (resultMsg.arg1 != FAILURE);
resultMsg.recycle();
return result;
}
public void updateBatteryWorkSource(WorkSource newSource) {
synchronized (mRunningWifiUids) {
try {
if (newSource != null) {
mRunningWifiUids.set(newSource);
}
if (mIsRunning) {
if (mReportedRunning) {
// If the work source has changed since last time, need
// to remove old work from battery stats.
if (mLastRunningWifiUids.diff(mRunningWifiUids)) {
mBatteryStats.noteWifiRunningChanged(mLastRunningWifiUids,
mRunningWifiUids);
mLastRunningWifiUids.set(mRunningWifiUids);
}
} else {
// Now being started, report it.
mBatteryStats.noteWifiRunning(mRunningWifiUids);
mLastRunningWifiUids.set(mRunningWifiUids);
mReportedRunning = true;
}
} else {
if (mReportedRunning) {
// Last reported we were running, time to stop.
mBatteryStats.noteWifiStopped(mLastRunningWifiUids);
mLastRunningWifiUids.clear();
mReportedRunning = false;
}
}
mWakeLock.setWorkSource(newSource);
} catch (RemoteException ignore) {
}
}
}
@Override
public String toString() {
StringBuffer sb = new StringBuffer();
String LS = System.getProperty("line.separator");
sb.append("current HSM state: ").append(getCurrentState().getName()).append(LS);
sb.append("mLinkProperties ").append(mLinkProperties).append(LS);
sb.append("mWifiInfo ").append(mWifiInfo).append(LS);
sb.append("mDhcpInfoInternal ").append(mDhcpInfoInternal).append(LS);
sb.append("mNetworkInfo ").append(mNetworkInfo).append(LS);
sb.append("mLastSignalLevel ").append(mLastSignalLevel).append(LS);
sb.append("mLastBssid ").append(mLastBssid).append(LS);
sb.append("mLastNetworkId ").append(mLastNetworkId).append(LS);
sb.append("mReconnectCount ").append(mReconnectCount).append(LS);
sb.append("mIsScanMode ").append(mIsScanMode).append(LS);
sb.append("Supplicant status").append(LS)
.append(mWifiNative.status()).append(LS).append(LS);
sb.append(mWifiConfigStore.dump());
return sb.toString();
}
@Override
protected boolean recordProcessedMessage(Message msg) {
//Ignore screen on/off & common messages when driver has started
if (getCurrentState() == mConnectedState || getCurrentState() == mDisconnectedState) {
switch (msg.what) {
case CMD_LOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_START_DRIVER:
case CMD_SET_SCAN_MODE:
case CMD_SET_HIGH_PERF_MODE:
case CMD_SET_SUSPEND_OPTIMIZATIONS:
case CMD_CLEAR_SUSPEND_OPTIMIZATIONS:
case CMD_ENABLE_BACKGROUND_SCAN:
case CMD_ENABLE_ALL_NETWORKS:
return false;
}
}
switch (msg.what) {
case CMD_START_SCAN:
case CMD_ENABLE_RSSI_POLL:
case CMD_RSSI_POLL:
case CMD_DELAYED_STOP_DRIVER:
case WifiMonitor.SCAN_RESULTS_EVENT:
case WifiWatchdogStateMachine.RSSI_FETCH:
return false;
default:
return true;
}
}
/*********************************************************
* Internal private functions
********************************************************/
private void checkAndSetConnectivityInstance() {
if (mCm == null) {
mCm = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
}
}
private boolean startTethering(ArrayList<String> available) {
boolean wifiAvailable = false;
checkAndSetConnectivityInstance();
String[] wifiRegexs = mCm.getTetherableWifiRegexs();
for (String intf : available) {
for (String regex : wifiRegexs) {
if (intf.matches(regex)) {
InterfaceConfiguration ifcg = null;
try {
ifcg = mNwService.getInterfaceConfig(intf);
if (ifcg != null) {
/* IP/netmask: 192.168.43.1/255.255.255.0 */
ifcg.setLinkAddress(new LinkAddress(
NetworkUtils.numericToInetAddress("192.168.43.1"), 24));
ifcg.setInterfaceUp();
mNwService.setInterfaceConfig(intf, ifcg);
}
} catch (Exception e) {
loge("Error configuring interface " + intf + ", :" + e);
return false;
}
if(mCm.tether(intf) != ConnectivityManager.TETHER_ERROR_NO_ERROR) {
loge("Error tethering on " + intf);
return false;
}
mTetherInterfaceName = intf;
return true;
}
}
}
// We found no interfaces to tether
return false;
}
private void stopTethering() {
checkAndSetConnectivityInstance();
/* Clear the interface config to allow dhcp correctly configure new
ip settings */
InterfaceConfiguration ifcg = null;
try {
ifcg = mNwService.getInterfaceConfig(mInterfaceName);
if (ifcg != null) {
ifcg.setLinkAddress(
new LinkAddress(NetworkUtils.numericToInetAddress("0.0.0.0"), 0));
mNwService.setInterfaceConfig(mInterfaceName, ifcg);
}
} catch (Exception e) {
loge("Error resetting interface " + mInterfaceName + ", :" + e);
}
if (mCm.untether(mTetherInterfaceName) != ConnectivityManager.TETHER_ERROR_NO_ERROR) {
loge("Untether initiate failed!");
}
}
private boolean isWifiTethered(ArrayList<String> active) {
checkAndSetConnectivityInstance();
String[] wifiRegexs = mCm.getTetherableWifiRegexs();
for (String intf : active) {
for (String regex : wifiRegexs) {
if (intf.matches(regex)) {
return true;
}
}
}
// We found no interfaces that are tethered
return false;
}
/**
* Set the country code from the system setting value, if any.
*/
private void setCountryCode() {
String countryCode = Settings.Secure.getString(mContext.getContentResolver(),
Settings.Secure.WIFI_COUNTRY_CODE);
if (countryCode != null && !countryCode.isEmpty()) {
setCountryCode(countryCode, false);
} else {
//use driver default
}
}
/**
* Set the frequency band from the system setting value, if any.
*/
private void setFrequencyBand() {
int band = Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.WIFI_FREQUENCY_BAND, WifiManager.WIFI_FREQUENCY_BAND_AUTO);
setFrequencyBand(band, false);
}
private void setWifiState(int wifiState) {
final int previousWifiState = mWifiState.get();
try {
if (wifiState == WIFI_STATE_ENABLED) {
mBatteryStats.noteWifiOn();
} else if (wifiState == WIFI_STATE_DISABLED) {
mBatteryStats.noteWifiOff();
}
} catch (RemoteException e) {
loge("Failed to note battery stats in wifi");
}
mWifiState.set(wifiState);
if (DBG) log("setWifiState: " + syncGetWifiStateByName());
final Intent intent = new Intent(WifiManager.WIFI_STATE_CHANGED_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
intent.putExtra(WifiManager.EXTRA_WIFI_STATE, wifiState);
intent.putExtra(WifiManager.EXTRA_PREVIOUS_WIFI_STATE, previousWifiState);
mContext.sendStickyBroadcast(intent);
}
private void setWifiApState(int wifiApState) {
final int previousWifiApState = mWifiApState.get();
try {
if (wifiApState == WIFI_AP_STATE_ENABLED) {
mBatteryStats.noteWifiOn();
} else if (wifiApState == WIFI_AP_STATE_DISABLED) {
mBatteryStats.noteWifiOff();
}
} catch (RemoteException e) {
loge("Failed to note battery stats in wifi");
}
// Update state
mWifiApState.set(wifiApState);
if (DBG) log("setWifiApState: " + syncGetWifiApStateByName());
final Intent intent = new Intent(WifiManager.WIFI_AP_STATE_CHANGED_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
intent.putExtra(WifiManager.EXTRA_WIFI_AP_STATE, wifiApState);
intent.putExtra(WifiManager.EXTRA_PREVIOUS_WIFI_AP_STATE, previousWifiApState);
mContext.sendStickyBroadcast(intent);
}
/**
* Parse the scan result line passed to us by wpa_supplicant (helper).
* @param line the line to parse
* @return the {@link ScanResult} object
*/
private ScanResult parseScanResult(String line) {
ScanResult scanResult = null;
if (line != null) {
/*
* Cache implementation (LinkedHashMap) is not synchronized, thus,
* must synchronized here!
*/
synchronized (mScanResultCache) {
String[] result = scanResultPattern.split(line);
if (3 <= result.length && result.length <= 5) {
String bssid = result[0];
// bssid | frequency | level | flags | ssid
int frequency;
int level;
try {
frequency = Integer.parseInt(result[1]);
level = Integer.parseInt(result[2]);
/* some implementations avoid negative values by adding 256
* so we need to adjust for that here.
*/
if (level > 0) level -= 256;
} catch (NumberFormatException e) {
frequency = 0;
level = 0;
}
/*
* The formatting of the results returned by
* wpa_supplicant is intended to make the fields
* line up nicely when printed,
* not to make them easy to parse. So we have to
* apply some heuristics to figure out which field
* is the SSID and which field is the flags.
*/
String ssid;
String flags;
if (result.length == 4) {
if (result[3].charAt(0) == '[') {
flags = result[3];
ssid = "";
} else {
flags = "";
ssid = result[3];
}
} else if (result.length == 5) {
flags = result[3];
ssid = result[4];
} else {
// Here, we must have 3 fields: no flags and ssid
// set
flags = "";
ssid = "";
}
// bssid + ssid is the hash key
String key = bssid + ssid;
scanResult = mScanResultCache.get(key);
if (scanResult != null) {
scanResult.level = level;
scanResult.SSID = ssid;
scanResult.capabilities = flags;
scanResult.frequency = frequency;
} else {
// Do not add scan results that have no SSID set
if (0 < ssid.trim().length()) {
scanResult =
new ScanResult(
ssid, bssid, flags, level, frequency);
mScanResultCache.put(key, scanResult);
}
}
} else {
loge("Misformatted scan result text with " +
result.length + " fields: " + line);
}
}
}
return scanResult;
}
/**
* scanResults input format
* 00:bb:cc:dd:cc:ee 2427 166 [WPA-EAP-TKIP][WPA2-EAP-CCMP] Net1
* 00:bb:cc:dd:cc:ff 2412 165 [WPA-EAP-TKIP][WPA2-EAP-CCMP] Net2
*/
private void setScanResults(String scanResults) {
if (scanResults == null) {
return;
}
List<ScanResult> scanList = new ArrayList<ScanResult>();
int lineCount = 0;
int scanResultsLen = scanResults.length();
// Parse the result string, keeping in mind that the last line does
// not end with a newline.
for (int lineBeg = 0, lineEnd = 0; lineEnd <= scanResultsLen; ++lineEnd) {
if (lineEnd == scanResultsLen || scanResults.charAt(lineEnd) == '\n') {
++lineCount;
if (lineCount == 1) {
lineBeg = lineEnd + 1;
continue;
}
if (lineEnd > lineBeg) {
String line = scanResults.substring(lineBeg, lineEnd);
ScanResult scanResult = parseScanResult(line);
if (scanResult != null) {
scanList.add(scanResult);
} else {
//TODO: hidden network handling
}
}
lineBeg = lineEnd + 1;
}
}
mScanResults = scanList;
}
/*
* Fetch RSSI and linkspeed on current connection
*/
private void fetchRssiAndLinkSpeedNative() {
int newRssi = -1;
int newLinkSpeed = -1;
String signalPoll = mWifiNative.signalPoll();
if (signalPoll != null) {
String[] lines = signalPoll.split("\n");
for (String line : lines) {
String[] prop = line.split("=");
if (prop.length < 2) continue;
try {
if (prop[0].equals("RSSI")) {
newRssi = Integer.parseInt(prop[1]);
} else if (prop[0].equals("LINKSPEED")) {
newLinkSpeed = Integer.parseInt(prop[1]);
}
} catch (NumberFormatException e) {
//Ignore, defaults on rssi and linkspeed are assigned
}
}
}
if (newRssi != -1 && MIN_RSSI < newRssi && newRssi < MAX_RSSI) { // screen out invalid values
/* some implementations avoid negative values by adding 256
* so we need to adjust for that here.
*/
if (newRssi > 0) newRssi -= 256;
mWifiInfo.setRssi(newRssi);
/*
* Rather then sending the raw RSSI out every time it
* changes, we precalculate the signal level that would
* be displayed in the status bar, and only send the
* broadcast if that much more coarse-grained number
* changes. This cuts down greatly on the number of
* broadcasts, at the cost of not informing others
* interested in RSSI of all the changes in signal
* level.
*/
int newSignalLevel = WifiManager.calculateSignalLevel(newRssi, WifiManager.RSSI_LEVELS);
if (newSignalLevel != mLastSignalLevel) {
sendRssiChangeBroadcast(newRssi);
}
mLastSignalLevel = newSignalLevel;
} else {
mWifiInfo.setRssi(MIN_RSSI);
}
if (newLinkSpeed != -1) {
mWifiInfo.setLinkSpeed(newLinkSpeed);
}
}
private void configureLinkProperties() {
if (mWifiConfigStore.isUsingStaticIp(mLastNetworkId)) {
mLinkProperties = mWifiConfigStore.getLinkProperties(mLastNetworkId);
} else {
synchronized (mDhcpInfoInternal) {
mLinkProperties = mDhcpInfoInternal.makeLinkProperties();
}
mLinkProperties.setHttpProxy(mWifiConfigStore.getProxyProperties(mLastNetworkId));
}
mLinkProperties.setInterfaceName(mInterfaceName);
if (DBG) {
log("netId=" + mLastNetworkId + " Link configured: " +
mLinkProperties.toString());
}
}
private int getMaxDhcpRetries() {
return Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.WIFI_MAX_DHCP_RETRY_COUNT,
DEFAULT_MAX_DHCP_RETRIES);
}
private void sendScanResultsAvailableBroadcast() {
Intent intent = new Intent(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
mContext.sendBroadcast(intent);
}
private void sendRssiChangeBroadcast(final int newRssi) {
Intent intent = new Intent(WifiManager.RSSI_CHANGED_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
intent.putExtra(WifiManager.EXTRA_NEW_RSSI, newRssi);
mContext.sendBroadcast(intent);
}
private void sendNetworkStateChangeBroadcast(String bssid) {
Intent intent = new Intent(WifiManager.NETWORK_STATE_CHANGED_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
intent.putExtra(WifiManager.EXTRA_NETWORK_INFO, new NetworkInfo(mNetworkInfo));
intent.putExtra(WifiManager.EXTRA_LINK_PROPERTIES, new LinkProperties (mLinkProperties));
if (bssid != null)
intent.putExtra(WifiManager.EXTRA_BSSID, bssid);
if (mNetworkInfo.getDetailedState() == DetailedState.VERIFYING_POOR_LINK ||
mNetworkInfo.getDetailedState() == DetailedState.CONNECTED) {
intent.putExtra(WifiManager.EXTRA_WIFI_INFO, new WifiInfo(mWifiInfo));
}
mContext.sendStickyBroadcast(intent);
}
private void sendLinkConfigurationChangedBroadcast() {
Intent intent = new Intent(WifiManager.LINK_CONFIGURATION_CHANGED_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
intent.putExtra(WifiManager.EXTRA_LINK_PROPERTIES, new LinkProperties(mLinkProperties));
mContext.sendBroadcast(intent);
}
private void sendSupplicantConnectionChangedBroadcast(boolean connected) {
Intent intent = new Intent(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
intent.putExtra(WifiManager.EXTRA_SUPPLICANT_CONNECTED, connected);
mContext.sendBroadcast(intent);
}
/**
* Record the detailed state of a network.
* @param state the new {@code DetailedState}
*/
private void setNetworkDetailedState(NetworkInfo.DetailedState state) {
if (DBG) {
log("setDetailed state, old ="
+ mNetworkInfo.getDetailedState() + " and new state=" + state);
}
if (state != mNetworkInfo.getDetailedState()) {
mNetworkInfo.setDetailedState(state, null, null);
}
}
private DetailedState getNetworkDetailedState() {
return mNetworkInfo.getDetailedState();
}
private SupplicantState handleSupplicantStateChange(Message message) {
StateChangeResult stateChangeResult = (StateChangeResult) message.obj;
SupplicantState state = stateChangeResult.state;
// Supplicant state change
// [31-13] Reserved for future use
// [8 - 0] Supplicant state (as defined in SupplicantState.java)
// 50023 supplicant_state_changed (custom|1|5)
EventLog.writeEvent(EVENTLOG_SUPPLICANT_STATE_CHANGED, state.ordinal());
mWifiInfo.setSupplicantState(state);
// Network id is only valid when we start connecting
if (SupplicantState.isConnecting(state)) {
mWifiInfo.setNetworkId(stateChangeResult.networkId);
} else {
mWifiInfo.setNetworkId(WifiConfiguration.INVALID_NETWORK_ID);
}
if (state == SupplicantState.ASSOCIATING) {
/* BSSID is valid only in ASSOCIATING state */
mWifiInfo.setBSSID(stateChangeResult.BSSID);
}
mWifiInfo.setSSID(stateChangeResult.SSID);
mSupplicantStateTracker.sendMessage(Message.obtain(message));
return state;
}
/**
* Resets the Wi-Fi Connections by clearing any state, resetting any sockets
* using the interface, stopping DHCP & disabling interface
*/
private void handleNetworkDisconnect() {
if (DBG) log("Stopping DHCP and clearing IP");
/*
* stop DHCP
*/
if (mDhcpStateMachine != null) {
/* In case we were in middle of DHCP operation
restore back powermode */
handlePostDhcpSetup();
mDhcpStateMachine.sendMessage(DhcpStateMachine.CMD_STOP_DHCP);
mDhcpStateMachine.quit();
mDhcpStateMachine = null;
}
try {
mNwService.clearInterfaceAddresses(mInterfaceName);
mNwService.disableIpv6(mInterfaceName);
} catch (Exception e) {
loge("Failed to clear addresses or disable ipv6" + e);
}
/* Reset data structures */
mWifiInfo.setInetAddress(null);
mWifiInfo.setBSSID(null);
mWifiInfo.setSSID(null);
mWifiInfo.setNetworkId(WifiConfiguration.INVALID_NETWORK_ID);
mWifiInfo.setRssi(MIN_RSSI);
mWifiInfo.setLinkSpeed(-1);
mWifiInfo.setMeteredHint(false);
setNetworkDetailedState(DetailedState.DISCONNECTED);
mWifiConfigStore.updateStatus(mLastNetworkId, DetailedState.DISCONNECTED);
/* send event to CM & network change broadcast */
sendNetworkStateChangeBroadcast(mLastBssid);
/* Clear network properties */
mLinkProperties.clear();
/* Clear IP settings if the network used DHCP */
if (!mWifiConfigStore.isUsingStaticIp(mLastNetworkId)) {
mWifiConfigStore.clearIpConfiguration(mLastNetworkId);
}
mLastBssid= null;
mLastNetworkId = WifiConfiguration.INVALID_NETWORK_ID;
}
void handlePreDhcpSetup() {
if (!mBluetoothConnectionActive) {
/*
* There are problems setting the Wi-Fi driver's power
* mode to active when bluetooth coexistence mode is
* enabled or sense.
* <p>
* We set Wi-Fi to active mode when
* obtaining an IP address because we've found
* compatibility issues with some routers with low power
* mode.
* <p>
* In order for this active power mode to properly be set,
* we disable coexistence mode until we're done with
* obtaining an IP address. One exception is if we
* are currently connected to a headset, since disabling
* coexistence would interrupt that connection.
*/
// Disable the coexistence mode
mWifiNative.setBluetoothCoexistenceMode(
mWifiNative.BLUETOOTH_COEXISTENCE_MODE_DISABLED);
}
/* Disable power save during DHCP */
if (mPowerSaveEnabled) {
mPowerSaveEnabled = false;
mWifiNative.setPowerSave(mPowerSaveEnabled);
}
}
void handlePostDhcpSetup() {
/* Restore power save */
mPowerSaveEnabled = true;
mWifiNative.setPowerSave(mPowerSaveEnabled);
// Set the coexistence mode back to its default value
mWifiNative.setBluetoothCoexistenceMode(
mWifiNative.BLUETOOTH_COEXISTENCE_MODE_SENSE);
}
private void handleSuccessfulIpConfiguration(DhcpInfoInternal dhcpInfoInternal) {
synchronized (mDhcpInfoInternal) {
mDhcpInfoInternal = dhcpInfoInternal;
}
mLastSignalLevel = -1; // force update of signal strength
mReconnectCount = 0; //Reset IP failure tracking
mWifiConfigStore.setIpConfiguration(mLastNetworkId, dhcpInfoInternal);
InetAddress addr = NetworkUtils.numericToInetAddress(dhcpInfoInternal.ipAddress);
mWifiInfo.setInetAddress(addr);
mWifiInfo.setMeteredHint(dhcpInfoInternal.hasMeteredHint());
if (getNetworkDetailedState() == DetailedState.CONNECTED) {
//DHCP renewal in connected state
LinkProperties linkProperties = dhcpInfoInternal.makeLinkProperties();
linkProperties.setHttpProxy(mWifiConfigStore.getProxyProperties(mLastNetworkId));
linkProperties.setInterfaceName(mInterfaceName);
if (!linkProperties.equals(mLinkProperties)) {
if (DBG) {
log("Link configuration changed for netId: " + mLastNetworkId
+ " old: " + mLinkProperties + "new: " + linkProperties);
}
mLinkProperties = linkProperties;
sendLinkConfigurationChangedBroadcast();
}
} else {
configureLinkProperties();
}
}
private void handleFailedIpConfiguration() {
loge("IP configuration failed");
mWifiInfo.setInetAddress(null);
mWifiInfo.setMeteredHint(false);
/**
* If we've exceeded the maximum number of retries for DHCP
* to a given network, disable the network
*/
int maxRetries = getMaxDhcpRetries();
// maxRetries == 0 means keep trying forever
if (maxRetries > 0 && ++mReconnectCount > maxRetries) {
loge("Failed " +
mReconnectCount + " times, Disabling " + mLastNetworkId);
mWifiConfigStore.disableNetwork(mLastNetworkId,
WifiConfiguration.DISABLED_DHCP_FAILURE);
mReconnectCount = 0;
}
/* DHCP times out after about 30 seconds, we do a
* disconnect and an immediate reconnect to try again
*/
mWifiNative.disconnect();
mWifiNative.reconnect();
}
/* Current design is to not set the config on a running hostapd but instead
* stop and start tethering when user changes config on a running access point
*
* TODO: Add control channel setup through hostapd that allows changing config
* on a running daemon
*/
private void startSoftApWithConfig(final WifiConfiguration config) {
// start hostapd on a seperate thread
new Thread(new Runnable() {
public void run() {
try {
mNwService.startAccessPoint(config, mInterfaceName, SOFTAP_IFACE);
} catch (Exception e) {
loge("Exception in softap start " + e);
try {
mNwService.stopAccessPoint(mInterfaceName);
mNwService.startAccessPoint(config, mInterfaceName, SOFTAP_IFACE);
} catch (Exception e1) {
loge("Exception in softap re-start " + e1);
sendMessage(CMD_START_AP_FAILURE);
return;
}
}
if (DBG) log("Soft AP start successful");
sendMessage(CMD_START_AP_SUCCESS);
}
}).start();
}
/********************************************************
* HSM states
*******************************************************/
class DefaultState extends State {
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED:
if (message.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
mWifiP2pChannel.sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION);
} else {
loge("WifiP2pService connection failure, error=" + message.arg1);
}
break;
case AsyncChannel.CMD_CHANNEL_DISCONNECTED:
loge("WifiP2pService channel lost, message.arg1 =" + message.arg1);
//TODO: Re-establish connection to state machine after a delay
//mWifiP2pChannel.connect(mContext, getHandler(), mWifiP2pManager.getMessenger());
break;
case CMD_BLUETOOTH_ADAPTER_STATE_CHANGE:
mBluetoothConnectionActive = (message.arg1 !=
BluetoothAdapter.STATE_DISCONNECTED);
break;
/* Synchronous call returns */
case CMD_PING_SUPPLICANT:
case CMD_ENABLE_NETWORK:
case CMD_ADD_OR_UPDATE_NETWORK:
case CMD_REMOVE_NETWORK:
case CMD_SAVE_CONFIG:
replyToMessage(message, message.what, FAILURE);
break;
case CMD_GET_CONFIGURED_NETWORKS:
replyToMessage(message, message.what, (List<WifiConfiguration>) null);
break;
case CMD_ENABLE_RSSI_POLL:
mEnableRssiPolling = (message.arg1 == 1);
break;
case CMD_ENABLE_BACKGROUND_SCAN:
mEnableBackgroundScan = (message.arg1 == 1);
break;
case CMD_SET_HIGH_PERF_MODE:
mHighPerfMode = (message.arg1 == 1);
break;
/* Discard */
case CMD_LOAD_DRIVER:
case CMD_UNLOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_STOP_SUPPLICANT:
case CMD_STOP_SUPPLICANT_FAILED:
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_DELAYED_STOP_DRIVER:
case CMD_DRIVER_START_TIMED_OUT:
case CMD_START_AP:
case CMD_START_AP_SUCCESS:
case CMD_START_AP_FAILURE:
case CMD_STOP_AP:
case CMD_TETHER_STATE_CHANGE:
case CMD_TETHER_NOTIFICATION_TIMED_OUT:
case CMD_START_SCAN:
case CMD_DISCONNECT:
case CMD_RECONNECT:
case CMD_REASSOCIATE:
case WifiMonitor.SUP_CONNECTION_EVENT:
case WifiMonitor.SUP_DISCONNECTION_EVENT:
case WifiMonitor.NETWORK_CONNECTION_EVENT:
case WifiMonitor.NETWORK_DISCONNECTION_EVENT:
case WifiMonitor.SCAN_RESULTS_EVENT:
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
case WifiMonitor.AUTHENTICATION_FAILURE_EVENT:
case WifiMonitor.WPS_OVERLAP_EVENT:
case CMD_BLACKLIST_NETWORK:
case CMD_CLEAR_BLACKLIST:
case CMD_SET_SCAN_MODE:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_RSSI_POLL:
case CMD_ENABLE_ALL_NETWORKS:
case DhcpStateMachine.CMD_PRE_DHCP_ACTION:
case DhcpStateMachine.CMD_POST_DHCP_ACTION:
/* Handled by WifiApConfigStore */
case CMD_SET_AP_CONFIG:
case CMD_SET_AP_CONFIG_COMPLETED:
case CMD_REQUEST_AP_CONFIG:
case CMD_RESPONSE_AP_CONFIG:
case WifiWatchdogStateMachine.POOR_LINK_DETECTED:
case WifiWatchdogStateMachine.GOOD_LINK_DETECTED:
case CMD_CLEAR_SUSPEND_OPTIMIZATIONS:
case CMD_NO_NETWORKS_PERIODIC_SCAN:
break;
case CMD_SET_SUSPEND_OPTIMIZATIONS:
mSuspendWakeLock.release();
break;
case WifiMonitor.DRIVER_HUNG_EVENT:
setWifiEnabled(false);
setWifiEnabled(true);
break;
case WifiManager.CONNECT_NETWORK:
replyToMessage(message, WifiManager.CONNECT_NETWORK_FAILED,
WifiManager.BUSY);
break;
case WifiManager.FORGET_NETWORK:
replyToMessage(message, WifiManager.FORGET_NETWORK_FAILED,
WifiManager.BUSY);
break;
case WifiManager.SAVE_NETWORK:
replyToMessage(message, WifiManager.SAVE_NETWORK_FAILED,
WifiManager.BUSY);
break;
case WifiManager.START_WPS:
replyToMessage(message, WifiManager.WPS_FAILED,
WifiManager.BUSY);
break;
case WifiManager.CANCEL_WPS:
replyToMessage(message, WifiManager.CANCEL_WPS_FAILED,
WifiManager.BUSY);
break;
case WifiManager.DISABLE_NETWORK:
replyToMessage(message, WifiManager.DISABLE_NETWORK_FAILED,
WifiManager.BUSY);
break;
case WifiWatchdogStateMachine.RSSI_FETCH:
replyToMessage(message, WifiWatchdogStateMachine.RSSI_FETCH_FAILED);
break;
default:
loge("Error! unhandled message" + message);
break;
}
return HANDLED;
}
}
class InitialState extends State {
@Override
//TODO: could move logging into a common class
public void enter() {
if (DBG) log(getName() + "\n");
// [31-8] Reserved for future use
// [7 - 0] HSM state change
// 50021 wifi_state_changed (custom|1|5)
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
if (mWifiNative.isDriverLoaded()) {
transitionTo(mDriverLoadedState);
}
else {
transitionTo(mDriverUnloadedState);
}
//Connect to WifiP2pService
mWifiP2pManager = (WifiP2pManager) mContext.getSystemService(Context.WIFI_P2P_SERVICE);
mWifiP2pChannel.connect(mContext, getHandler(), mWifiP2pManager.getMessenger());
/* IPv6 is disabled at boot time and is controlled by framework
* to be enabled only as long as we are connected to an access point
*
* This fixes issues, a few being:
* - IPv6 addresses and routes stick around after disconnection
* - When connected, the kernel is unaware and can fail to start IPv6 negotiation
* - The kernel sometimes starts autoconfiguration when 802.1x is not complete
*/
try {
mNwService.disableIpv6(mInterfaceName);
} catch (RemoteException re) {
loge("Failed to disable IPv6: " + re);
} catch (IllegalStateException e) {
loge("Failed to disable IPv6: " + e);
}
}
}
class DriverLoadingState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
final Message message = new Message();
message.copyFrom(getCurrentMessage());
/* TODO: add a timeout to fail when driver load is hung.
* Similarly for driver unload.
*/
new Thread(new Runnable() {
public void run() {
mWakeLock.acquire();
//enabling state
switch(message.arg1) {
case WIFI_STATE_ENABLING:
setWifiState(WIFI_STATE_ENABLING);
break;
case WIFI_AP_STATE_ENABLING:
setWifiApState(WIFI_AP_STATE_ENABLING);
break;
}
if(mWifiNative.loadDriver()) {
if (DBG) log("Driver load successful");
sendMessage(CMD_LOAD_DRIVER_SUCCESS);
} else {
loge("Failed to load driver!");
switch(message.arg1) {
case WIFI_STATE_ENABLING:
setWifiState(WIFI_STATE_UNKNOWN);
break;
case WIFI_AP_STATE_ENABLING:
setWifiApState(WIFI_AP_STATE_FAILED);
break;
}
sendMessage(CMD_LOAD_DRIVER_FAILURE);
}
mWakeLock.release();
}
}).start();
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case CMD_LOAD_DRIVER_SUCCESS:
transitionTo(mDriverLoadedState);
break;
case CMD_LOAD_DRIVER_FAILURE:
transitionTo(mDriverFailedState);
break;
case CMD_LOAD_DRIVER:
case CMD_UNLOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_STOP_SUPPLICANT:
case CMD_START_AP:
case CMD_STOP_AP:
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_MODE:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class DriverLoadedState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_UNLOAD_DRIVER:
transitionTo(mDriverUnloadingState);
break;
case CMD_START_SUPPLICANT:
try {
mNwService.wifiFirmwareReload(mInterfaceName, "STA");
} catch (Exception e) {
loge("Failed to reload STA firmware " + e);
// continue
}
try {
//A runtime crash can leave the interface up and
//this affects connectivity when supplicant starts up.
//Ensure interface is down before a supplicant start.
mNwService.setInterfaceDown(mInterfaceName);
//Set privacy extensions
mNwService.setInterfaceIpv6PrivacyExtensions(mInterfaceName, true);
} catch (RemoteException re) {
loge("Unable to change interface settings: " + re);
} catch (IllegalStateException ie) {
loge("Unable to change interface settings: " + ie);
}
if(mWifiNative.startSupplicant(mP2pSupported)) {
if (DBG) log("Supplicant start successful");
mWifiMonitor.startMonitoring();
transitionTo(mSupplicantStartingState);
} else {
loge("Failed to start supplicant!");
sendMessage(obtainMessage(CMD_UNLOAD_DRIVER, WIFI_STATE_UNKNOWN, 0));
}
break;
case CMD_START_AP:
transitionTo(mSoftApStartingState);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class DriverUnloadingState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
final Message message = new Message();
message.copyFrom(getCurrentMessage());
new Thread(new Runnable() {
public void run() {
if (DBG) log(getName() + message.toString() + "\n");
mWakeLock.acquire();
if(mWifiNative.unloadDriver()) {
if (DBG) log("Driver unload successful");
sendMessage(CMD_UNLOAD_DRIVER_SUCCESS);
switch(message.arg1) {
case WIFI_STATE_DISABLED:
case WIFI_STATE_UNKNOWN:
setWifiState(message.arg1);
break;
case WIFI_AP_STATE_DISABLED:
case WIFI_AP_STATE_FAILED:
setWifiApState(message.arg1);
break;
}
} else {
loge("Failed to unload driver!");
sendMessage(CMD_UNLOAD_DRIVER_FAILURE);
switch(message.arg1) {
case WIFI_STATE_DISABLED:
case WIFI_STATE_UNKNOWN:
setWifiState(WIFI_STATE_UNKNOWN);
break;
case WIFI_AP_STATE_DISABLED:
case WIFI_AP_STATE_FAILED:
setWifiApState(WIFI_AP_STATE_FAILED);
break;
}
}
mWakeLock.release();
}
}).start();
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case CMD_UNLOAD_DRIVER_SUCCESS:
transitionTo(mDriverUnloadedState);
break;
case CMD_UNLOAD_DRIVER_FAILURE:
transitionTo(mDriverFailedState);
break;
case CMD_LOAD_DRIVER:
case CMD_UNLOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_STOP_SUPPLICANT:
case CMD_START_AP:
case CMD_STOP_AP:
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_MODE:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class DriverUnloadedState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case CMD_LOAD_DRIVER:
transitionTo(mDriverLoadingState);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class DriverFailedState extends State {
@Override
public void enter() {
loge(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
return NOT_HANDLED;
}
}
class SupplicantStartingState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
private void initializeWpsDetails() {
String detail;
detail = SystemProperties.get("ro.product.name", "");
if (!mWifiNative.setDeviceName(detail)) {
loge("Failed to set device name " + detail);
}
detail = SystemProperties.get("ro.product.manufacturer", "");
if (!mWifiNative.setManufacturer(detail)) {
loge("Failed to set manufacturer " + detail);
}
detail = SystemProperties.get("ro.product.model", "");
if (!mWifiNative.setModelName(detail)) {
loge("Failed to set model name " + detail);
}
detail = SystemProperties.get("ro.product.model", "");
if (!mWifiNative.setModelNumber(detail)) {
loge("Failed to set model number " + detail);
}
detail = SystemProperties.get("ro.serialno", "");
if (!mWifiNative.setSerialNumber(detail)) {
loge("Failed to set serial number " + detail);
}
if (!mWifiNative.setConfigMethods("physical_display virtual_push_button keypad")) {
loge("Failed to set WPS config methods");
}
if (!mWifiNative.setDeviceType(mPrimaryDeviceType)) {
loge("Failed to set primary device type " + mPrimaryDeviceType);
}
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case WifiMonitor.SUP_CONNECTION_EVENT:
if (DBG) log("Supplicant connection established");
setWifiState(WIFI_STATE_ENABLED);
mSupplicantRestartCount = 0;
/* Reset the supplicant state to indicate the supplicant
* state is not known at this time */
mSupplicantStateTracker.sendMessage(CMD_RESET_SUPPLICANT_STATE);
/* Initialize data structures */
mLastBssid = null;
mLastNetworkId = WifiConfiguration.INVALID_NETWORK_ID;
mLastSignalLevel = -1;
mWifiInfo.setMacAddress(mWifiNative.getMacAddress());
mWifiConfigStore.initialize();
initializeWpsDetails();
sendSupplicantConnectionChangedBroadcast(true);
transitionTo(mDriverStartedState);
break;
case WifiMonitor.SUP_DISCONNECTION_EVENT:
if (++mSupplicantRestartCount <= SUPPLICANT_RESTART_TRIES) {
loge("Failed to setup control channel, restart supplicant");
mWifiNative.killSupplicant();
transitionTo(mDriverLoadedState);
sendMessageDelayed(CMD_START_SUPPLICANT, SUPPLICANT_RESTART_INTERVAL_MSECS);
} else {
loge("Failed " + mSupplicantRestartCount +
" times to start supplicant, unload driver");
mSupplicantRestartCount = 0;
transitionTo(mDriverLoadedState);
sendMessage(obtainMessage(CMD_UNLOAD_DRIVER, WIFI_STATE_UNKNOWN, 0));
}
break;
case CMD_LOAD_DRIVER:
case CMD_UNLOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_STOP_SUPPLICANT:
case CMD_START_AP:
case CMD_STOP_AP:
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_MODE:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class SupplicantStartedState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
/* Initialize for connect mode operation at start */
mIsScanMode = false;
/* Wifi is available as long as we have a connection to supplicant */
mNetworkInfo.setIsAvailable(true);
int defaultInterval = mContext.getResources().getInteger(
com.android.internal.R.integer.config_wifi_supplicant_scan_interval);
mSupplicantScanIntervalMs = Settings.Secure.getLong(mContext.getContentResolver(),
Settings.Secure.WIFI_SUPPLICANT_SCAN_INTERVAL_MS,
defaultInterval);
mWifiNative.setScanInterval((int)mSupplicantScanIntervalMs / 1000);
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
WifiConfiguration config;
switch(message.what) {
case CMD_STOP_SUPPLICANT: /* Supplicant stopped by user */
transitionTo(mSupplicantStoppingState);
break;
case WifiMonitor.SUP_DISCONNECTION_EVENT: /* Supplicant connection lost */
loge("Connection lost, restart supplicant");
mWifiNative.killSupplicant();
mWifiNative.closeSupplicantConnection();
mNetworkInfo.setIsAvailable(false);
handleNetworkDisconnect();
sendSupplicantConnectionChangedBroadcast(false);
mSupplicantStateTracker.sendMessage(CMD_RESET_SUPPLICANT_STATE);
transitionTo(mDriverLoadedState);
sendMessageDelayed(CMD_START_SUPPLICANT, SUPPLICANT_RESTART_INTERVAL_MSECS);
break;
case WifiMonitor.SCAN_RESULTS_EVENT:
setScanResults(mWifiNative.scanResults());
sendScanResultsAvailableBroadcast();
mScanResultIsPending = false;
break;
case CMD_PING_SUPPLICANT:
boolean ok = mWifiNative.ping();
replyToMessage(message, message.what, ok ? SUCCESS : FAILURE);
break;
case CMD_ADD_OR_UPDATE_NETWORK:
config = (WifiConfiguration) message.obj;
replyToMessage(message, CMD_ADD_OR_UPDATE_NETWORK,
mWifiConfigStore.addOrUpdateNetwork(config));
break;
case CMD_REMOVE_NETWORK:
ok = mWifiConfigStore.removeNetwork(message.arg1);
replyToMessage(message, message.what, ok ? SUCCESS : FAILURE);
break;
case CMD_ENABLE_NETWORK:
ok = mWifiConfigStore.enableNetwork(message.arg1, message.arg2 == 1);
replyToMessage(message, message.what, ok ? SUCCESS : FAILURE);
break;
case CMD_ENABLE_ALL_NETWORKS:
long time = android.os.SystemClock.elapsedRealtime();
if (time - mLastEnableAllNetworksTime > MIN_INTERVAL_ENABLE_ALL_NETWORKS_MS) {
mWifiConfigStore.enableAllNetworks();
mLastEnableAllNetworksTime = time;
}
break;
case WifiManager.DISABLE_NETWORK:
if (mWifiConfigStore.disableNetwork(message.arg1,
WifiConfiguration.DISABLED_UNKNOWN_REASON) == true) {
replyToMessage(message, WifiManager.DISABLE_NETWORK_SUCCEEDED);
} else {
replyToMessage(message, WifiManager.DISABLE_NETWORK_FAILED,
WifiManager.ERROR);
}
break;
case CMD_BLACKLIST_NETWORK:
mWifiNative.addToBlacklist((String)message.obj);
break;
case CMD_CLEAR_BLACKLIST:
mWifiNative.clearBlacklist();
break;
case CMD_SAVE_CONFIG:
ok = mWifiConfigStore.saveConfig();
replyToMessage(message, CMD_SAVE_CONFIG, ok ? SUCCESS : FAILURE);
// Inform the backup manager about a data change
IBackupManager ibm = IBackupManager.Stub.asInterface(
ServiceManager.getService(Context.BACKUP_SERVICE));
if (ibm != null) {
try {
ibm.dataChanged("com.android.providers.settings");
} catch (Exception e) {
// Try again later
}
}
break;
case CMD_GET_CONFIGURED_NETWORKS:
replyToMessage(message, message.what,
mWifiConfigStore.getConfiguredNetworks());
break;
/* Cannot start soft AP while in client mode */
case CMD_START_AP:
loge("Failed to start soft AP with a running supplicant");
setWifiApState(WIFI_AP_STATE_FAILED);
break;
case CMD_SET_SCAN_MODE:
mIsScanMode = (message.arg1 == SCAN_ONLY_MODE);
break;
case WifiManager.SAVE_NETWORK:
config = (WifiConfiguration) message.obj;
NetworkUpdateResult result = mWifiConfigStore.saveNetwork(config);
if (result.getNetworkId() != WifiConfiguration.INVALID_NETWORK_ID) {
replyToMessage(message, WifiManager.SAVE_NETWORK_SUCCEEDED);
} else {
loge("Failed to save network");
replyToMessage(message, WifiManager.SAVE_NETWORK_FAILED,
WifiManager.ERROR);
}
break;
case WifiManager.FORGET_NETWORK:
if (mWifiConfigStore.forgetNetwork(message.arg1)) {
replyToMessage(message, WifiManager.FORGET_NETWORK_SUCCEEDED);
} else {
loge("Failed to forget network");
replyToMessage(message, WifiManager.FORGET_NETWORK_FAILED,
WifiManager.ERROR);
}
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
@Override
public void exit() {
mNetworkInfo.setIsAvailable(false);
}
}
class SupplicantStoppingState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
/* Send any reset commands to supplicant before shutting it down */
handleNetworkDisconnect();
if (DBG) log("stopping supplicant");
if (!mWifiNative.stopSupplicant()) {
loge("Failed to stop supplicant");
}
/* Send ourselves a delayed message to indicate failure after a wait time */
sendMessageDelayed(obtainMessage(CMD_STOP_SUPPLICANT_FAILED,
++mSupplicantStopFailureToken, 0), SUPPLICANT_RESTART_INTERVAL_MSECS);
mNetworkInfo.setIsAvailable(false);
setWifiState(WIFI_STATE_DISABLING);
sendSupplicantConnectionChangedBroadcast(false);
mSupplicantStateTracker.sendMessage(CMD_RESET_SUPPLICANT_STATE);
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case WifiMonitor.SUP_CONNECTION_EVENT:
loge("Supplicant connection received while stopping");
break;
case WifiMonitor.SUP_DISCONNECTION_EVENT:
if (DBG) log("Supplicant connection lost");
/* Socket connection can be lost when we do a graceful shutdown
* or when the driver is hung. Ensure supplicant is stopped here.
*/
mWifiNative.killSupplicant();
mWifiNative.closeSupplicantConnection();
transitionTo(mDriverLoadedState);
break;
case CMD_STOP_SUPPLICANT_FAILED:
if (message.arg1 == mSupplicantStopFailureToken) {
loge("Timed out on a supplicant stop, kill and proceed");
mWifiNative.killSupplicant();
mWifiNative.closeSupplicantConnection();
transitionTo(mDriverLoadedState);
}
break;
case CMD_LOAD_DRIVER:
case CMD_UNLOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_STOP_SUPPLICANT:
case CMD_START_AP:
case CMD_STOP_AP:
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_MODE:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class DriverStartingState extends State {
private int mTries;
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
mTries = 1;
/* Send ourselves a delayed message to start driver a second time */
sendMessageDelayed(obtainMessage(CMD_DRIVER_START_TIMED_OUT,
++mDriverStartToken, 0), DRIVER_START_TIME_OUT_MSECS);
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
SupplicantState state = handleSupplicantStateChange(message);
/* If suplicant is exiting out of INTERFACE_DISABLED state into
* a state that indicates driver has started, it is ready to
* receive driver commands
*/
if (SupplicantState.isDriverActive(state)) {
transitionTo(mDriverStartedState);
}
break;
case CMD_DRIVER_START_TIMED_OUT:
if (message.arg1 == mDriverStartToken) {
if (mTries >= 2) {
loge("Failed to start driver after " + mTries);
transitionTo(mDriverStoppedState);
} else {
loge("Driver start failed, retrying");
mWakeLock.acquire();
mWifiNative.startDriver();
mWakeLock.release();
++mTries;
/* Send ourselves a delayed message to start driver again */
sendMessageDelayed(obtainMessage(CMD_DRIVER_START_TIMED_OUT,
++mDriverStartToken, 0), DRIVER_START_TIME_OUT_MSECS);
}
}
break;
/* Queue driver commands & connection events */
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case WifiMonitor.NETWORK_CONNECTION_EVENT:
case WifiMonitor.NETWORK_DISCONNECTION_EVENT:
case WifiMonitor.AUTHENTICATION_FAILURE_EVENT:
case WifiMonitor.WPS_OVERLAP_EVENT:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
case CMD_START_SCAN:
case CMD_DISCONNECT:
case CMD_REASSOCIATE:
case CMD_RECONNECT:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class DriverStartedState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
mIsRunning = true;
mInDelayedStop = false;
updateBatteryWorkSource(null);
/**
* Enable bluetooth coexistence scan mode when bluetooth connection is active.
* When this mode is on, some of the low-level scan parameters used by the
* driver are changed to reduce interference with bluetooth
*/
mWifiNative.setBluetoothCoexistenceScanMode(mBluetoothConnectionActive);
/* set country code */
setCountryCode();
/* set frequency band of operation */
setFrequencyBand();
/* initialize network state */
setNetworkDetailedState(DetailedState.DISCONNECTED);
/* Remove any filtering on Multicast v6 at start */
mWifiNative.stopFilteringMulticastV6Packets();
/* Reset Multicast v4 filtering state */
if (mFilteringMulticastV4Packets.get()) {
mWifiNative.startFilteringMulticastV4Packets();
} else {
mWifiNative.stopFilteringMulticastV4Packets();
}
mWifiNative.setPowerSave(mPowerSaveEnabled);
if (mIsScanMode) {
mWifiNative.setScanResultHandling(SCAN_ONLY_MODE);
mWifiNative.disconnect();
transitionTo(mScanModeState);
} else {
mWifiNative.setScanResultHandling(CONNECT_MODE);
mWifiNative.reconnect();
// Status pulls in the current supplicant state and network connection state
// events over the monitor connection. This helps framework sync up with
// current supplicant state
mWifiNative.status();
transitionTo(mDisconnectedState);
}
if (mP2pSupported) mWifiP2pChannel.sendMessage(WifiStateMachine.CMD_ENABLE_P2P);
mContext.registerReceiver(mScreenReceiver, mScreenFilter);
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_SET_SCAN_TYPE:
mSetScanActive = (message.arg1 == SCAN_ACTIVE);
mWifiNative.setScanMode(mSetScanActive);
break;
case CMD_START_SCAN:
boolean forceActive = (message.arg1 == SCAN_ACTIVE);
if (forceActive && !mSetScanActive) {
mWifiNative.setScanMode(forceActive);
}
mWifiNative.scan();
if (forceActive && !mSetScanActive) {
mWifiNative.setScanMode(mSetScanActive);
}
mScanResultIsPending = true;
break;
case CMD_SET_COUNTRY_CODE:
String country = (String) message.obj;
if (DBG) log("set country code " + country);
if (!mWifiNative.setCountryCode(country.toUpperCase())) {
loge("Failed to set country code " + country);
}
break;
case CMD_SET_FREQUENCY_BAND:
int band = message.arg1;
if (DBG) log("set frequency band " + band);
if (mWifiNative.setBand(band)) {
mFrequencyBand.set(band);
//Fetch the latest scan results when frequency band is set
startScan(true);
} else {
loge("Failed to set frequency band " + band);
}
break;
case CMD_BLUETOOTH_ADAPTER_STATE_CHANGE:
mBluetoothConnectionActive = (message.arg1 !=
BluetoothAdapter.STATE_DISCONNECTED);
mWifiNative.setBluetoothCoexistenceScanMode(mBluetoothConnectionActive);
break;
case CMD_STOP_DRIVER:
int mode = message.arg1;
/* Already doing a delayed stop && not in ecm state */
if (mInDelayedStop && mode != IN_ECM_STATE) {
if (DBG) log("Already in delayed stop");
break;
}
mInDelayedStop = true;
mDelayedStopCounter++;
if (DBG) log("Delayed stop message " + mDelayedStopCounter);
if (mode == IN_ECM_STATE) {
/* send a shut down immediately */
sendMessage(obtainMessage(CMD_DELAYED_STOP_DRIVER, mDelayedStopCounter, 0));
} else {
/* send regular delayed shut down */
Intent driverStopIntent = new Intent(ACTION_DELAYED_DRIVER_STOP, null);
driverStopIntent.putExtra(DELAYED_STOP_COUNTER, mDelayedStopCounter);
mDriverStopIntent = PendingIntent.getBroadcast(mContext,
DRIVER_STOP_REQUEST, driverStopIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
mAlarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
+ mDriverStopDelayMs, mDriverStopIntent);
}
break;
case CMD_START_DRIVER:
if (mInDelayedStop) {
mInDelayedStop = false;
mDelayedStopCounter++;
mAlarmManager.cancel(mDriverStopIntent);
if (DBG) log("Delayed stop ignored due to start");
}
break;
case CMD_DELAYED_STOP_DRIVER:
if (DBG) log("delayed stop " + message.arg1 + " " + mDelayedStopCounter);
if (message.arg1 != mDelayedStopCounter) break;
if (getCurrentState() != mDisconnectedState) {
mWifiNative.disconnect();
handleNetworkDisconnect();
}
mWakeLock.acquire();
mWifiNative.stopDriver();
transitionTo(mDriverStoppingState);
mWakeLock.release();
break;
case CMD_START_PACKET_FILTERING:
if (message.arg1 == MULTICAST_V6) {
mWifiNative.startFilteringMulticastV6Packets();
} else if (message.arg1 == MULTICAST_V4) {
mWifiNative.startFilteringMulticastV4Packets();
} else {
loge("Illegal arugments to CMD_START_PACKET_FILTERING");
}
break;
case CMD_STOP_PACKET_FILTERING:
if (message.arg1 == MULTICAST_V6) {
mWifiNative.stopFilteringMulticastV6Packets();
} else if (message.arg1 == MULTICAST_V4) {
mWifiNative.stopFilteringMulticastV4Packets();
} else {
loge("Illegal arugments to CMD_STOP_PACKET_FILTERING");
}
break;
case CMD_SET_SUSPEND_OPTIMIZATIONS:
if (!mHighPerfMode) {
mWifiNative.setSuspendOptimizations(true);
}
mSuspendWakeLock.release();
break;
case CMD_CLEAR_SUSPEND_OPTIMIZATIONS:
mWifiNative.setSuspendOptimizations(false);
break;
case CMD_SET_HIGH_PERF_MODE:
mHighPerfMode = (message.arg1 == 1);
if (mHighPerfMode) {
//Disable any suspend optimizations
mWifiNative.setSuspendOptimizations(false);
}
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
@Override
public void exit() {
if (DBG) log(getName() + "\n");
mIsRunning = false;
updateBatteryWorkSource(null);
mScanResults = null;
if (mP2pSupported) mWifiP2pChannel.sendMessage(WifiStateMachine.CMD_DISABLE_P2P);
mContext.unregisterReceiver(mScreenReceiver);
}
}
class DriverStoppingState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
SupplicantState state = handleSupplicantStateChange(message);
if (state == SupplicantState.INTERFACE_DISABLED) {
transitionTo(mDriverStoppedState);
}
break;
/* Queue driver commands */
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
case CMD_START_SCAN:
case CMD_DISCONNECT:
case CMD_REASSOCIATE:
case CMD_RECONNECT:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class DriverStoppedState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
StateChangeResult stateChangeResult = (StateChangeResult) message.obj;
SupplicantState state = stateChangeResult.state;
// A WEXT bug means that we can be back to driver started state
// unexpectedly
if (SupplicantState.isDriverActive(state)) {
transitionTo(mDriverStartedState);
}
break;
case CMD_START_DRIVER:
mWakeLock.acquire();
mWifiNative.startDriver();
mWakeLock.release();
transitionTo(mDriverStartingState);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class ScanModeState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_SET_SCAN_MODE:
if (message.arg1 == SCAN_ONLY_MODE) {
/* Ignore */
return HANDLED;
} else {
mWifiNative.setScanResultHandling(message.arg1);
mWifiNative.reconnect();
mIsScanMode = false;
transitionTo(mDisconnectedState);
}
break;
/* Ignore */
case CMD_DISCONNECT:
case CMD_RECONNECT:
case CMD_REASSOCIATE:
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
case WifiMonitor.NETWORK_CONNECTION_EVENT:
case WifiMonitor.NETWORK_DISCONNECTION_EVENT:
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class ConnectModeState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
StateChangeResult stateChangeResult;
switch(message.what) {
case WifiMonitor.AUTHENTICATION_FAILURE_EVENT:
mSupplicantStateTracker.sendMessage(WifiMonitor.AUTHENTICATION_FAILURE_EVENT);
break;
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
SupplicantState state = handleSupplicantStateChange(message);
// A driver/firmware hang can now put the interface in a down state.
// We detect the interface going down and recover from it
if (!SupplicantState.isDriverActive(state)) {
if (mNetworkInfo.getState() != NetworkInfo.State.DISCONNECTED) {
handleNetworkDisconnect();
}
log("Detected an interface down, restart driver");
transitionTo(mDriverStoppedState);
sendMessage(CMD_START_DRIVER);
break;
}
// Supplicant can fail to report a NETWORK_DISCONNECTION_EVENT
// when authentication times out after a successful connection,
// we can figure this from the supplicant state. If supplicant
// state is DISCONNECTED, but the mNetworkInfo says we are not
// disconnected, we need to handle a disconnection
if (state == SupplicantState.DISCONNECTED &&
mNetworkInfo.getState() != NetworkInfo.State.DISCONNECTED) {
if (DBG) log("Missed CTRL-EVENT-DISCONNECTED, disconnect");
handleNetworkDisconnect();
transitionTo(mDisconnectedState);
}
break;
/* Do a redundant disconnect without transition */
case CMD_DISCONNECT:
mWifiNative.disconnect();
break;
case CMD_RECONNECT:
mWifiNative.reconnect();
break;
case CMD_REASSOCIATE:
mWifiNative.reassociate();
break;
case WifiManager.CONNECT_NETWORK:
/* The connect message can contain a network id passed as arg1 on message or
* or a config passed as obj on message.
* For a new network, a config is passed to create and connect.
* For an existing network, a network id is passed
*/
int netId = message.arg1;
WifiConfiguration config = (WifiConfiguration) message.obj;
/* Save the network config */
if (config != null) {
NetworkUpdateResult result = mWifiConfigStore.saveNetwork(config);
netId = result.getNetworkId();
}
if (mWifiConfigStore.selectNetwork(netId) &&
mWifiNative.reconnect()) {
/* The state tracker handles enabling networks upon completion/failure */
mSupplicantStateTracker.sendMessage(WifiManager.CONNECT_NETWORK);
replyToMessage(message, WifiManager.CONNECT_NETWORK_SUCCEEDED);
/* Expect a disconnection from the old connection */
transitionTo(mDisconnectingState);
} else {
loge("Failed to connect config: " + config + " netId: " + netId);
replyToMessage(message, WifiManager.CONNECT_NETWORK_FAILED,
WifiManager.ERROR);
break;
}
break;
case WifiManager.START_WPS:
WpsInfo wpsInfo = (WpsInfo) message.obj;
WpsResult result;
switch (wpsInfo.setup) {
case WpsInfo.PBC:
result = mWifiConfigStore.startWpsPbc(wpsInfo);
break;
case WpsInfo.KEYPAD:
result = mWifiConfigStore.startWpsWithPinFromAccessPoint(wpsInfo);
break;
case WpsInfo.DISPLAY:
result = mWifiConfigStore.startWpsWithPinFromDevice(wpsInfo);
break;
default:
result = new WpsResult(Status.FAILURE);
Log.e(TAG, "Invalid setup for WPS");
break;
}
if (result.status == Status.SUCCESS) {
replyToMessage(message, WifiManager.START_WPS_SUCCEEDED, result);
transitionTo(mWpsRunningState);
} else {
Log.e(TAG, "Failed to start WPS with config " + wpsInfo.toString());
replyToMessage(message, WifiManager.WPS_FAILED, WifiManager.ERROR);
}
break;
case WifiMonitor.SCAN_RESULTS_EVENT:
/* Set the scan setting back to "connect" mode */
mWifiNative.setScanResultHandling(CONNECT_MODE);
/* Handle scan results */
return NOT_HANDLED;
case WifiMonitor.NETWORK_CONNECTION_EVENT:
if (DBG) log("Network connection established");
mLastNetworkId = message.arg1;
mLastBssid = (String) message.obj;
mWifiInfo.setBSSID(mLastBssid);
mWifiInfo.setNetworkId(mLastNetworkId);
/* send event to CM & network change broadcast */
setNetworkDetailedState(DetailedState.OBTAINING_IPADDR);
sendNetworkStateChangeBroadcast(mLastBssid);
transitionTo(mObtainingIpState);
break;
case WifiMonitor.NETWORK_DISCONNECTION_EVENT:
if (DBG) log("Network connection lost");
handleNetworkDisconnect();
transitionTo(mDisconnectedState);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class L2ConnectedState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
mRssiPollToken++;
if (mEnableRssiPolling) {
sendMessage(obtainMessage(CMD_RSSI_POLL, mRssiPollToken, 0));
}
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case DhcpStateMachine.CMD_PRE_DHCP_ACTION:
handlePreDhcpSetup();
mDhcpStateMachine.sendMessage(DhcpStateMachine.CMD_PRE_DHCP_ACTION_COMPLETE);
break;
case DhcpStateMachine.CMD_POST_DHCP_ACTION:
handlePostDhcpSetup();
if (message.arg1 == DhcpStateMachine.DHCP_SUCCESS) {
if (DBG) log("DHCP successful");
handleSuccessfulIpConfiguration((DhcpInfoInternal) message.obj);
transitionTo(mVerifyingLinkState);
} else if (message.arg1 == DhcpStateMachine.DHCP_FAILURE) {
if (DBG) log("DHCP failed");
handleFailedIpConfiguration();
transitionTo(mDisconnectingState);
}
break;
case CMD_DISCONNECT:
mWifiNative.disconnect();
transitionTo(mDisconnectingState);
break;
case CMD_SET_SCAN_MODE:
if (message.arg1 == SCAN_ONLY_MODE) {
sendMessage(CMD_DISCONNECT);
deferMessage(message);
}
break;
case CMD_START_SCAN:
/* When the network is connected, re-scanning can trigger
* a reconnection. Put it in scan-only mode during scan.
* When scan results are received, the mode is switched
* back to CONNECT_MODE.
*/
mWifiNative.setScanResultHandling(SCAN_ONLY_MODE);
/* Have the parent state handle the rest */
return NOT_HANDLED;
/* Ignore connection to same network */
case WifiManager.CONNECT_NETWORK:
int netId = message.arg1;
if (mWifiInfo.getNetworkId() == netId) {
break;
}
return NOT_HANDLED;
case WifiManager.SAVE_NETWORK:
WifiConfiguration config = (WifiConfiguration) message.obj;
NetworkUpdateResult result = mWifiConfigStore.saveNetwork(config);
if (mWifiInfo.getNetworkId() == result.getNetworkId()) {
if (result.hasIpChanged()) {
log("Reconfiguring IP on connection");
transitionTo(mObtainingIpState);
}
if (result.hasProxyChanged()) {
log("Reconfiguring proxy on connection");
configureLinkProperties();
sendLinkConfigurationChangedBroadcast();
}
}
if (result.getNetworkId() != WifiConfiguration.INVALID_NETWORK_ID) {
replyToMessage(message, WifiManager.SAVE_NETWORK_SUCCEEDED);
} else {
loge("Failed to save network");
replyToMessage(message, WifiManager.SAVE_NETWORK_FAILED,
WifiManager.ERROR);
}
break;
/* Ignore */
case WifiMonitor.NETWORK_CONNECTION_EVENT:
break;
case CMD_RSSI_POLL:
if (message.arg1 == mRssiPollToken) {
// Get Info and continue polling
fetchRssiAndLinkSpeedNative();
sendMessageDelayed(obtainMessage(CMD_RSSI_POLL,
mRssiPollToken, 0), POLL_RSSI_INTERVAL_MSECS);
} else {
// Polling has completed
}
break;
case CMD_ENABLE_RSSI_POLL:
mEnableRssiPolling = (message.arg1 == 1);
mRssiPollToken++;
if (mEnableRssiPolling) {
// first poll
fetchRssiAndLinkSpeedNative();
sendMessageDelayed(obtainMessage(CMD_RSSI_POLL,
mRssiPollToken, 0), POLL_RSSI_INTERVAL_MSECS);
}
break;
case WifiWatchdogStateMachine.RSSI_FETCH:
fetchRssiAndLinkSpeedNative();
replyToMessage(message, WifiWatchdogStateMachine.RSSI_FETCH_SUCCEEDED,
mWifiInfo.getRssi());
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
@Override
public void exit() {
/* If a scan result is pending in connected state, the supplicant
* is in SCAN_ONLY_MODE. Restore CONNECT_MODE on exit
*/
if (mScanResultIsPending) {
mWifiNative.setScanResultHandling(CONNECT_MODE);
}
}
}
class ObtainingIpState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
if (!mWifiConfigStore.isUsingStaticIp(mLastNetworkId)) {
//start DHCP
mDhcpStateMachine = DhcpStateMachine.makeDhcpStateMachine(
mContext, WifiStateMachine.this, mInterfaceName);
mDhcpStateMachine.registerForPreDhcpNotification();
mDhcpStateMachine.sendMessage(DhcpStateMachine.CMD_START_DHCP);
} else {
DhcpInfoInternal dhcpInfoInternal = mWifiConfigStore.getIpConfiguration(
mLastNetworkId);
InterfaceConfiguration ifcg = new InterfaceConfiguration();
ifcg.setLinkAddress(dhcpInfoInternal.makeLinkAddress());
ifcg.setInterfaceUp();
try {
mNwService.setInterfaceConfig(mInterfaceName, ifcg);
if (DBG) log("Static IP configuration succeeded");
sendMessage(CMD_STATIC_IP_SUCCESS, dhcpInfoInternal);
} catch (RemoteException re) {
loge("Static IP configuration failed: " + re);
sendMessage(CMD_STATIC_IP_FAILURE);
} catch (IllegalStateException e) {
loge("Static IP configuration failed: " + e);
sendMessage(CMD_STATIC_IP_FAILURE);
}
}
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_STATIC_IP_SUCCESS:
handleSuccessfulIpConfiguration((DhcpInfoInternal) message.obj);
transitionTo(mVerifyingLinkState);
break;
case CMD_STATIC_IP_FAILURE:
handleFailedIpConfiguration();
transitionTo(mDisconnectingState);
break;
case WifiManager.SAVE_NETWORK:
deferMessage(message);
break;
/* Defer any power mode changes since we must keep active power mode at DHCP */
case CMD_SET_HIGH_PERF_MODE:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class VerifyingLinkState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
setNetworkDetailedState(DetailedState.VERIFYING_POOR_LINK);
mWifiConfigStore.updateStatus(mLastNetworkId, DetailedState.VERIFYING_POOR_LINK);
sendNetworkStateChangeBroadcast(mLastBssid);
}
@Override
public boolean processMessage(Message message) {
switch (message.what) {
case WifiWatchdogStateMachine.POOR_LINK_DETECTED:
//stay here
break;
case WifiWatchdogStateMachine.GOOD_LINK_DETECTED:
try {
mNwService.enableIpv6(mInterfaceName);
} catch (RemoteException re) {
loge("Failed to enable IPv6: " + re);
} catch (IllegalStateException e) {
loge("Failed to enable IPv6: " + e);
}
setNetworkDetailedState(DetailedState.CONNECTED);
mWifiConfigStore.updateStatus(mLastNetworkId, DetailedState.CONNECTED);
sendNetworkStateChangeBroadcast(mLastBssid);
transitionTo(mConnectedState);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class ConnectedState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case WifiWatchdogStateMachine.POOR_LINK_DETECTED:
if (DBG) log("Watchdog reports poor link");
try {
mNwService.disableIpv6(mInterfaceName);
} catch (RemoteException re) {
loge("Failed to disable IPv6: " + re);
} catch (IllegalStateException e) {
loge("Failed to disable IPv6: " + e);
}
/* Report a disconnect */
setNetworkDetailedState(DetailedState.DISCONNECTED);
mWifiConfigStore.updateStatus(mLastNetworkId, DetailedState.DISCONNECTED);
sendNetworkStateChangeBroadcast(mLastBssid);
transitionTo(mVerifyingLinkState);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
@Override
public void exit() {
/* Request a CS wakelock during transition to mobile */
checkAndSetConnectivityInstance();
mCm.requestNetworkTransitionWakelock(TAG);
}
}
class DisconnectingState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case CMD_SET_SCAN_MODE:
if (message.arg1 == SCAN_ONLY_MODE) {
deferMessage(message);
}
break;
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
/* If we get a SUPPLICANT_STATE_CHANGE_EVENT before NETWORK_DISCONNECTION_EVENT
* we have missed the network disconnection, transition to mDisconnectedState
* and handle the rest of the events there
*/
deferMessage(message);
handleNetworkDisconnect();
transitionTo(mDisconnectedState);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class DisconnectedState extends State {
private boolean mAlarmEnabled = false;
/* This is set from the overlay config file or from a secure setting.
* A value of 0 disables scanning in the framework.
*/
private long mFrameworkScanIntervalMs;
private void setScanAlarm(boolean enabled) {
if (enabled == mAlarmEnabled) return;
if (enabled) {
if (mFrameworkScanIntervalMs > 0) {
mAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
System.currentTimeMillis() + mFrameworkScanIntervalMs,
mFrameworkScanIntervalMs,
mScanIntent);
mAlarmEnabled = true;
}
} else {
mAlarmManager.cancel(mScanIntent);
mAlarmEnabled = false;
}
}
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
mFrameworkScanIntervalMs = Settings.Secure.getLong(mContext.getContentResolver(),
Settings.Secure.WIFI_FRAMEWORK_SCAN_INTERVAL_MS,
mDefaultFrameworkScanIntervalMs);
/*
* We initiate background scanning if it is enabled, otherwise we
* initiate an infrequent scan that wakes up the device to ensure
* a user connects to an access point on the move
*/
if (mEnableBackgroundScan) {
/* If a regular scan result is pending, do not initiate background
* scan until the scan results are returned. This is needed because
* initiating a background scan will cancel the regular scan and
* scan results will not be returned until background scanning is
* cleared
*/
if (!mScanResultIsPending) {
mWifiNative.enableBackgroundScan(true);
}
} else {
setScanAlarm(true);
}
/**
* If we have no networks saved, the supplicant stops doing the periodic scan.
* The scans are useful to notify the user of the presence of an open network.
* Note that these are not wake up scans.
*/
if (mWifiConfigStore.getConfiguredNetworks().size() == 0) {
sendMessageDelayed(obtainMessage(CMD_NO_NETWORKS_PERIODIC_SCAN,
++mPeriodicScanToken, 0), mSupplicantScanIntervalMs);
}
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
boolean ret = HANDLED;
switch (message.what) {
case CMD_NO_NETWORKS_PERIODIC_SCAN:
if (message.arg1 == mPeriodicScanToken &&
mWifiConfigStore.getConfiguredNetworks().size() == 0) {
sendMessage(CMD_START_SCAN);
sendMessageDelayed(obtainMessage(CMD_NO_NETWORKS_PERIODIC_SCAN,
++mPeriodicScanToken, 0), mSupplicantScanIntervalMs);
}
break;
case WifiManager.FORGET_NETWORK:
case CMD_REMOVE_NETWORK:
// Set up a delayed message here. After the forget/remove is handled
// the handled delayed message will determine if there is a need to
// scan and continue
sendMessageDelayed(obtainMessage(CMD_NO_NETWORKS_PERIODIC_SCAN,
++mPeriodicScanToken, 0), mSupplicantScanIntervalMs);
ret = NOT_HANDLED;
break;
case CMD_SET_SCAN_MODE:
if (message.arg1 == SCAN_ONLY_MODE) {
mWifiNative.setScanResultHandling(message.arg1);
//Supplicant disconnect to prevent further connects
mWifiNative.disconnect();
mIsScanMode = true;
transitionTo(mScanModeState);
}
break;
case CMD_ENABLE_BACKGROUND_SCAN:
mEnableBackgroundScan = (message.arg1 == 1);
if (mEnableBackgroundScan) {
mWifiNative.enableBackgroundScan(true);
setScanAlarm(false);
} else {
mWifiNative.enableBackgroundScan(false);
setScanAlarm(true);
}
break;
/* Ignore network disconnect */
case WifiMonitor.NETWORK_DISCONNECTION_EVENT:
break;
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
StateChangeResult stateChangeResult = (StateChangeResult) message.obj;
setNetworkDetailedState(WifiInfo.getDetailedStateOf(stateChangeResult.state));
/* ConnectModeState does the rest of the handling */
ret = NOT_HANDLED;
break;
case CMD_START_SCAN:
/* Disable background scan temporarily during a regular scan */
if (mEnableBackgroundScan) {
mWifiNative.enableBackgroundScan(false);
}
/* Handled in parent state */
ret = NOT_HANDLED;
break;
case WifiMonitor.SCAN_RESULTS_EVENT:
/* Re-enable background scan when a pending scan result is received */
if (mEnableBackgroundScan && mScanResultIsPending) {
mWifiNative.enableBackgroundScan(true);
}
/* Handled in parent state */
ret = NOT_HANDLED;
break;
default:
ret = NOT_HANDLED;
}
return ret;
}
@Override
public void exit() {
/* No need for a background scan upon exit from a disconnected state */
if (mEnableBackgroundScan) {
mWifiNative.enableBackgroundScan(false);
}
setScanAlarm(false);
}
}
class WpsRunningState extends State {
//Tracks the source to provide a reply
private Message mSourceMessage;
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
mSourceMessage = Message.obtain(getCurrentMessage());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch (message.what) {
case WifiMonitor.WPS_SUCCESS_EVENT:
replyToMessage(mSourceMessage, WifiManager.WPS_COMPLETED);
mSourceMessage.recycle();
mSourceMessage = null;
transitionTo(mDisconnectedState);
break;
case WifiMonitor.WPS_OVERLAP_EVENT:
replyToMessage(mSourceMessage, WifiManager.WPS_FAILED,
WifiManager.WPS_OVERLAP_ERROR);
mSourceMessage.recycle();
mSourceMessage = null;
transitionTo(mDisconnectedState);
break;
case WifiMonitor.WPS_FAIL_EVENT:
//arg1 has the reason for the failure
replyToMessage(mSourceMessage, WifiManager.WPS_FAILED, message.arg1);
mSourceMessage.recycle();
mSourceMessage = null;
transitionTo(mDisconnectedState);
break;
case WifiMonitor.WPS_TIMEOUT_EVENT:
replyToMessage(mSourceMessage, WifiManager.WPS_FAILED,
WifiManager.WPS_TIMED_OUT);
mSourceMessage.recycle();
mSourceMessage = null;
transitionTo(mDisconnectedState);
break;
case WifiManager.START_WPS:
replyToMessage(message, WifiManager.WPS_FAILED, WifiManager.IN_PROGRESS);
break;
case WifiManager.CANCEL_WPS:
if (mWifiNative.cancelWps()) {
replyToMessage(message, WifiManager.CANCEL_WPS_SUCCEDED);
} else {
replyToMessage(message, WifiManager.CANCEL_WPS_FAILED, WifiManager.ERROR);
}
transitionTo(mDisconnectedState);
break;
/* Defer all commands that can cause connections to a different network
* or put the state machine out of connect mode
*/
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_MODE:
case WifiManager.CONNECT_NETWORK:
case CMD_ENABLE_NETWORK:
case CMD_RECONNECT:
case CMD_REASSOCIATE:
case WifiMonitor.NETWORK_CONNECTION_EVENT: /* Handled after exiting WPS state */
deferMessage(message);
break;
case WifiMonitor.NETWORK_DISCONNECTION_EVENT:
if (DBG) log("Network connection lost");
handleNetworkDisconnect();
break;
case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
//Throw away supplicant state changes when WPS is running.
//We will start getting supplicant state changes once we get
//a WPS success or failure
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
@Override
public void exit() {
mWifiConfigStore.enableAllNetworks();
mWifiConfigStore.loadConfiguredNetworks();
}
}
class SoftApStartingState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
final Message message = getCurrentMessage();
if (message.what == CMD_START_AP) {
final WifiConfiguration config = (WifiConfiguration) message.obj;
if (config == null) {
mWifiApConfigChannel.sendMessage(CMD_REQUEST_AP_CONFIG);
} else {
mWifiApConfigChannel.sendMessage(CMD_SET_AP_CONFIG, config);
startSoftApWithConfig(config);
}
} else {
throw new RuntimeException("Illegal transition to SoftApStartingState: " + message);
}
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_LOAD_DRIVER:
case CMD_UNLOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_STOP_SUPPLICANT:
case CMD_START_AP:
case CMD_STOP_AP:
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_MODE:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
case CMD_TETHER_STATE_CHANGE:
deferMessage(message);
break;
case WifiStateMachine.CMD_RESPONSE_AP_CONFIG:
WifiConfiguration config = (WifiConfiguration) message.obj;
if (config != null) {
startSoftApWithConfig(config);
} else {
loge("Softap config is null!");
sendMessage(CMD_START_AP_FAILURE);
}
break;
case CMD_START_AP_SUCCESS:
setWifiApState(WIFI_AP_STATE_ENABLED);
transitionTo(mSoftApStartedState);
break;
case CMD_START_AP_FAILURE:
// initiate driver unload
sendMessage(obtainMessage(CMD_UNLOAD_DRIVER, WIFI_AP_STATE_FAILED, 0));
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class SoftApStartedState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_STOP_AP:
if (DBG) log("Stopping Soft AP");
setWifiApState(WIFI_AP_STATE_DISABLING);
/* We have not tethered at this point, so we just shutdown soft Ap */
try {
mNwService.stopAccessPoint(mInterfaceName);
} catch(Exception e) {
loge("Exception in stopAccessPoint()");
}
transitionTo(mDriverLoadedState);
break;
case CMD_START_AP:
// Ignore a start on a running access point
break;
/* Fail client mode operation when soft AP is enabled */
case CMD_START_SUPPLICANT:
loge("Cannot start supplicant with a running soft AP");
setWifiState(WIFI_STATE_UNKNOWN);
break;
case CMD_TETHER_STATE_CHANGE:
TetherStateChange stateChange = (TetherStateChange) message.obj;
if (startTethering(stateChange.available)) {
transitionTo(mTetheringState);
}
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class TetheringState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
/* Send ourselves a delayed message to shut down if tethering fails to notify */
sendMessageDelayed(obtainMessage(CMD_TETHER_NOTIFICATION_TIMED_OUT,
++mTetherToken, 0), TETHER_NOTIFICATION_TIME_OUT_MSECS);
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_TETHER_STATE_CHANGE:
TetherStateChange stateChange = (TetherStateChange) message.obj;
if (isWifiTethered(stateChange.active)) {
transitionTo(mTetheredState);
}
return HANDLED;
case CMD_TETHER_NOTIFICATION_TIMED_OUT:
if (message.arg1 == mTetherToken) {
loge("Failed to get tether update, shutdown soft access point");
setWifiApEnabled(null, false);
}
break;
case CMD_LOAD_DRIVER:
case CMD_UNLOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_STOP_SUPPLICANT:
case CMD_START_AP:
case CMD_STOP_AP:
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_MODE:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class TetheredState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_TETHER_STATE_CHANGE:
TetherStateChange stateChange = (TetherStateChange) message.obj;
if (!isWifiTethered(stateChange.active)) {
loge("Tethering reports wifi as untethered!, shut down soft Ap");
setWifiApEnabled(null, false);
}
return HANDLED;
case CMD_STOP_AP:
if (DBG) log("Untethering before stopping AP");
setWifiApState(WIFI_AP_STATE_DISABLING);
stopTethering();
transitionTo(mSoftApStoppingState);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
class SoftApStoppingState extends State {
@Override
public void enter() {
if (DBG) log(getName() + "\n");
EventLog.writeEvent(EVENTLOG_WIFI_STATE_CHANGED, getName());
/* Send ourselves a delayed message to shut down if tethering fails to notify */
sendMessageDelayed(obtainMessage(CMD_TETHER_NOTIFICATION_TIMED_OUT,
++mTetherToken, 0), TETHER_NOTIFICATION_TIME_OUT_MSECS);
}
@Override
public boolean processMessage(Message message) {
if (DBG) log(getName() + message.toString() + "\n");
switch(message.what) {
case CMD_TETHER_STATE_CHANGE:
TetherStateChange stateChange = (TetherStateChange) message.obj;
/* Wait till wifi is untethered */
if (isWifiTethered(stateChange.active)) break;
try {
mNwService.stopAccessPoint(mInterfaceName);
} catch(Exception e) {
loge("Exception in stopAccessPoint()");
}
transitionTo(mDriverLoadedState);
break;
case CMD_TETHER_NOTIFICATION_TIMED_OUT:
if (message.arg1 == mTetherToken) {
loge("Failed to get tether update, force stop access point");
try {
mNwService.stopAccessPoint(mInterfaceName);
} catch(Exception e) {
loge("Exception in stopAccessPoint()");
}
transitionTo(mDriverLoadedState);
}
break;
case CMD_LOAD_DRIVER:
case CMD_UNLOAD_DRIVER:
case CMD_START_SUPPLICANT:
case CMD_STOP_SUPPLICANT:
case CMD_START_AP:
case CMD_STOP_AP:
case CMD_START_DRIVER:
case CMD_STOP_DRIVER:
case CMD_SET_SCAN_MODE:
case CMD_SET_SCAN_TYPE:
case CMD_SET_COUNTRY_CODE:
case CMD_SET_FREQUENCY_BAND:
case CMD_START_PACKET_FILTERING:
case CMD_STOP_PACKET_FILTERING:
deferMessage(message);
break;
default:
return NOT_HANDLED;
}
return HANDLED;
}
}
//State machine initiated requests can have replyTo set to null indicating
//there are no recepients, we ignore those reply actions
private void replyToMessage(Message msg, int what) {
if (msg.replyTo == null) return;
Message dstMsg = obtainMessageWithArg2(msg);
dstMsg.what = what;
mReplyChannel.replyToMessage(msg, dstMsg);
}
private void replyToMessage(Message msg, int what, int arg1) {
if (msg.replyTo == null) return;
Message dstMsg = obtainMessageWithArg2(msg);
dstMsg.what = what;
dstMsg.arg1 = arg1;
mReplyChannel.replyToMessage(msg, dstMsg);
}
private void replyToMessage(Message msg, int what, Object obj) {
if (msg.replyTo == null) return;
Message dstMsg = obtainMessageWithArg2(msg);
dstMsg.what = what;
dstMsg.obj = obj;
mReplyChannel.replyToMessage(msg, dstMsg);
}
/**
* arg2 on the source message has a unique id that needs to be retained in replies
* to match the request
*
* see WifiManager for details
*/
private Message obtainMessageWithArg2(Message srcMsg) {
Message msg = Message.obtain();
msg.arg2 = srcMsg.arg2;
return msg;
}
private void log(String s) {
Log.d(TAG, s);
}
private void loge(String s) {
Log.e(TAG, s);
}
}