xref: /frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiStateMachine.java

/*
 * 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 com.android.server.wifi;

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 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;

import android.Manifest;
import android.app.ActivityManager;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.ApplicationInfo;
import android.content.pm.IPackageManager;
import android.content.pm.PackageManager;
import android.database.ContentObserver;
import android.net.ConnectivityManager;
import android.net.DhcpResults;
import android.net.LinkProperties;
import android.net.Network;
import android.net.NetworkAgent;
import android.net.NetworkCapabilities;
import android.net.NetworkFactory;
import android.net.NetworkInfo;
import android.net.NetworkInfo.DetailedState;
import android.net.NetworkMisc;
import android.net.NetworkRequest;
import android.net.NetworkUtils;
import android.net.RouteInfo;
import android.net.StaticIpConfiguration;
import android.net.dhcp.DhcpClient;
import android.net.ip.IpManager;
import android.net.wifi.PasspointManagementObjectDefinition;
import android.net.wifi.RssiPacketCountInfo;
import android.net.wifi.ScanResult;
import android.net.wifi.ScanSettings;
import android.net.wifi.SupplicantState;
import android.net.wifi.WifiChannel;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiConnectionStatistics;
import android.net.wifi.WifiEnterpriseConfig;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiLinkLayerStats;
import android.net.wifi.WifiManager;
import android.net.wifi.WifiScanner;
import android.net.wifi.WifiSsid;
import android.net.wifi.WpsInfo;
import android.net.wifi.WpsResult;
import android.net.wifi.WpsResult.Status;
import android.net.wifi.p2p.IWifiP2pManager;
import android.os.BatteryStats;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.os.INetworkManagementService;
import android.os.Looper;
import android.os.Message;
import android.os.Messenger;
import android.os.PowerManager;
import android.os.Process;
import android.os.RemoteException;
import android.os.SystemClock;
import android.os.UserHandle;
import android.os.UserManager;
import android.os.WorkSource;
import android.provider.Settings;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.Log;
import android.util.SparseArray;

import com.android.internal.R;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.app.IBatteryStats;
import com.android.internal.util.AsyncChannel;
import com.android.internal.util.MessageUtils;
import com.android.internal.util.Protocol;
import com.android.internal.util.State;
import com.android.internal.util.StateMachine;
import com.android.server.connectivity.KeepalivePacketData;
import com.android.server.wifi.hotspot2.IconEvent;
import com.android.server.wifi.hotspot2.NetworkDetail;
import com.android.server.wifi.hotspot2.Utils;
import com.android.server.wifi.p2p.WifiP2pServiceImpl;
import com.android.server.wifi.util.TelephonyUtil;

import java.io.BufferedReader;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.Random;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * TODO:
 * Deprecate WIFI_STATE_UNKNOWN
 */

/**
 * 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, SoftAp and p2p
 * In the current implementation, we support concurrent wifi p2p and wifi operation.
 * The WifiStateMachine handles SoftAp and Client operations while WifiP2pService
 * handles p2p operation.
 *
 * @hide
 */
public class WifiStateMachine extends StateMachine implements WifiNative.WifiRssiEventHandler {

    private static final String NETWORKTYPE = "WIFI";
    private static final String NETWORKTYPE_UNTRUSTED = "WIFI_UT";
    @VisibleForTesting public static final short NUM_LOG_RECS_NORMAL = 100;
    @VisibleForTesting public static final short NUM_LOG_RECS_VERBOSE_LOW_MEMORY = 200;
    @VisibleForTesting public static final short NUM_LOG_RECS_VERBOSE = 3000;
    private static boolean DBG = false;
    private static boolean USE_PAUSE_SCANS = false;
    private static final String TAG = "WifiStateMachine";

    private static final int ONE_HOUR_MILLI = 1000 * 60 * 60;

    private static final String GOOGLE_OUI = "DA-A1-19";

    private int mVerboseLoggingLevel = 0;
    /* debug flag, indicating if handling of ASSOCIATION_REJECT ended up blacklisting
     * the corresponding BSSID.
     */
    private boolean didBlackListBSSID = false;

    /**
     * Log with error attribute
     *
     * @param s is string log
     */
    protected void loge(String s) {
        Log.e(getName(), s);
    }
    protected void logd(String s) {
        Log.d(getName(), s);
    }
    protected void log(String s) {;
        Log.d(getName(), s);
    }
    private WifiLastResortWatchdog mWifiLastResortWatchdog;
    private WifiMetrics mWifiMetrics;
    private WifiInjector mWifiInjector;
    private WifiMonitor mWifiMonitor;
    private WifiNative mWifiNative;
    private WifiConfigManager mWifiConfigManager;
    private WifiConnectivityManager mWifiConnectivityManager;
    private WifiQualifiedNetworkSelector mWifiQualifiedNetworkSelector;
    private INetworkManagementService mNwService;
    private ConnectivityManager mCm;
    private BaseWifiLogger mWifiLogger;
    private WifiApConfigStore mWifiApConfigStore;
    private final boolean mP2pSupported;
    private final AtomicBoolean mP2pConnected = new AtomicBoolean(false);
    private boolean mTemporarilyDisconnectWifi = false;
    private final String mPrimaryDeviceType;
    private final Clock mClock;
    private final PropertyService mPropertyService;
    private final BuildProperties mBuildProperties;
    private final WifiCountryCode mCountryCode;

    /* Scan results handling */
    private List<ScanDetail> mScanResults = new ArrayList<>();
    private final Object mScanResultsLock = new Object();

    // For debug, number of known scan results that were found as part of last scan result event,
    // as well the number of scans results returned by the supplicant with that message
    private int mNumScanResultsKnown;
    private int mNumScanResultsReturned;

    private boolean mScreenOn = false;

    /* Chipset supports background scan */
    private final boolean mBackgroundScanSupported;

    private final String mInterfaceName;
    /* Tethering interface could be separate from wlan interface */
    private String mTetherInterfaceName;

    private int mLastSignalLevel = -1;
    private String mLastBssid;
    private int mLastNetworkId; // The network Id we successfully joined
    private boolean linkDebouncing = false;

    @Override
    public void onRssiThresholdBreached(byte curRssi) {
        if (DBG) {
            Log.e(TAG, "onRssiThresholdBreach event. Cur Rssi = " + curRssi);
        }
        sendMessage(CMD_RSSI_THRESHOLD_BREACH, curRssi);
    }

    public void processRssiThreshold(byte curRssi, int reason) {
        if (curRssi == Byte.MAX_VALUE || curRssi == Byte.MIN_VALUE) {
            Log.wtf(TAG, "processRssiThreshold: Invalid rssi " + curRssi);
            return;
        }
        for (int i = 0; i < mRssiRanges.length; i++) {
            if (curRssi < mRssiRanges[i]) {
                // Assume sorted values(ascending order) for rssi,
                // bounded by high(127) and low(-128) at extremeties
                byte maxRssi = mRssiRanges[i];
                byte minRssi = mRssiRanges[i-1];
                // This value of hw has to be believed as this value is averaged and has breached
                // the rssi thresholds and raised event to host. This would be eggregious if this
                // value is invalid
                mWifiInfo.setRssi((int) curRssi);
                updateCapabilities(getCurrentWifiConfiguration());
                int ret = startRssiMonitoringOffload(maxRssi, minRssi);
                Log.d(TAG, "Re-program RSSI thresholds for " + smToString(reason) +
                        ": [" + minRssi + ", " + maxRssi + "], curRssi=" + curRssi + " ret=" + ret);
                break;
            }
        }
    }

    // Testing various network disconnect cases by sending lots of spurious
    // disconnect to supplicant
    private boolean testNetworkDisconnect = false;

    private boolean mEnableRssiPolling = false;
    private int mRssiPollToken = 0;
    /* 3 operational states for STA operation: CONNECT_MODE, SCAN_ONLY_MODE, SCAN_ONLY_WIFI_OFF_MODE
    * In CONNECT_MODE, the STA can scan and connect to an access point
    * In SCAN_ONLY_MODE, the STA can only scan for access points
    * In SCAN_ONLY_WIFI_OFF_MODE, the STA can only scan for access points with wifi toggle being off
    */
    private int mOperationalMode = CONNECT_MODE;
    private boolean mIsScanOngoing = false;
    private boolean mIsFullScanOngoing = false;
    private boolean mSendScanResultsBroadcast = false;

    private final Queue<Message> mBufferedScanMsg = new LinkedList<Message>();
    private WorkSource mScanWorkSource = null;
    private static final int UNKNOWN_SCAN_SOURCE = -1;
    private static final int ADD_OR_UPDATE_SOURCE = -3;
    private static final int SET_ALLOW_UNTRUSTED_SOURCE = -4;
    private static final int ENABLE_WIFI = -5;
    public static final int DFS_RESTRICTED_SCAN_REQUEST = -6;

    private static final int SCAN_REQUEST_BUFFER_MAX_SIZE = 10;
    private static final String CUSTOMIZED_SCAN_SETTING = "customized_scan_settings";
    private static final String CUSTOMIZED_SCAN_WORKSOURCE = "customized_scan_worksource";
    private static final String SCAN_REQUEST_TIME = "scan_request_time";

    /* Tracks if state machine has received any screen state change broadcast yet.
     * We can miss one of these at boot.
     */
    private AtomicBoolean mScreenBroadcastReceived = new AtomicBoolean(false);

    private boolean mBluetoothConnectionActive = false;

    private PowerManager.WakeLock mSuspendWakeLock;

    /**
     * Interval in milliseconds between polling for RSSI
     * and linkspeed information
     */
    private static final int POLL_RSSI_INTERVAL_MSECS = 3000;

    /**
     * Interval in milliseconds between receiving a disconnect event
     * while connected to a good AP, and handling the disconnect proper
     */
    private static final int LINK_FLAPPING_DEBOUNCE_MSEC = 4000;

    /**
     * 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;

    /**
     * Don't select new network when previous network selection is
     * pending connection for this much time
     */
    private static final int CONNECT_TIMEOUT_MSEC = 3000;

    /**
     * The link properties of the wifi interface.
     * Do not modify this directly; use updateLinkProperties instead.
     */
    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 final Object mDhcpResultsLock = new Object();
    private DhcpResults mDhcpResults;

    // NOTE: Do not return to clients - use #getWiFiInfoForUid(int)
    private final WifiInfo mWifiInfo;
    private NetworkInfo mNetworkInfo;
    private final NetworkCapabilities mDfltNetworkCapabilities;
    private SupplicantStateTracker mSupplicantStateTracker;

    private int mWifiLinkLayerStatsSupported = 4; // Temporary disable

    // Whether the state machine goes thru the Disconnecting->Disconnected->ObtainingIpAddress
    private boolean mAutoRoaming = false;

    // Roaming failure count
    private int mRoamFailCount = 0;

    // This is the BSSID we are trying to associate to, it can be set to "any"
    // if we havent selected a BSSID for joining.
    // if we havent selected a BSSID for joining.
    // The BSSID we are associated to is found in mWifiInfo
    private String mTargetRoamBSSID = "any";
    //This one is used to track whta is the current target network ID. This is used for error
    // handling during connection setup since many error message from supplicant does not report
    // SSID Once connected, it will be set to invalid
    private int mTargetNetworkId = WifiConfiguration.INVALID_NETWORK_ID;

    private long mLastDriverRoamAttempt = 0;

    private WifiConfiguration targetWificonfiguration = null;

    // Used as debug to indicate which configuration last was saved
    private WifiConfiguration lastSavedConfigurationAttempt = null;

    // Used as debug to indicate which configuration last was removed
    private WifiConfiguration lastForgetConfigurationAttempt = null;

    //Random used by softAP channel Selection
    private static Random mRandom = new Random(Calendar.getInstance().getTimeInMillis());

    boolean isRoaming() {
        return mAutoRoaming;
    }

    public void autoRoamSetBSSID(int netId, String bssid) {
        autoRoamSetBSSID(mWifiConfigManager.getWifiConfiguration(netId), bssid);
    }

    public boolean autoRoamSetBSSID(WifiConfiguration config, String bssid) {
        boolean ret = true;
        if (mTargetRoamBSSID == null) mTargetRoamBSSID = "any";
        if (bssid == null) bssid = "any";
        if (config == null) return false; // Nothing to do

        if (mTargetRoamBSSID != null
                && bssid.equals(mTargetRoamBSSID) && bssid.equals(config.BSSID)) {
            return false; // We didnt change anything
        }
        if (!mTargetRoamBSSID.equals("any") && bssid.equals("any")) {
            // Changing to ANY
            if (!mWifiConfigManager.ROAM_ON_ANY) {
                ret = false; // Nothing to do
            }
        }
        if (config.BSSID != null) {
            bssid = config.BSSID;
            if (DBG) {
                Log.d(TAG, "force BSSID to " + bssid + "due to config");
            }
        }

        if (DBG) {
            logd("autoRoamSetBSSID " + bssid + " key=" + config.configKey());
        }
        mTargetRoamBSSID = bssid;
        mWifiConfigManager.saveWifiConfigBSSID(config, bssid);
        return ret;
    }

    /**
     * set Config's default BSSID (for association purpose)
     * @param config config need set BSSID
     * @param bssid  default BSSID to assocaite with when connect to this network
     * @return false -- does not change the current default BSSID of the configure
     *         true -- change the  current default BSSID of the configur
     */
    private boolean setTargetBssid(WifiConfiguration config, String bssid) {
        if (config == null) {
            return false;
        }

        if (config.BSSID != null) {
            bssid = config.BSSID;
            if (DBG) {
                Log.d(TAG, "force BSSID to " + bssid + "due to config");
            }
        }

        if (bssid == null) {
            bssid = "any";
        }

        String networkSelectionBSSID = config.getNetworkSelectionStatus()
                .getNetworkSelectionBSSID();
        if (networkSelectionBSSID != null && networkSelectionBSSID.equals(bssid)) {
            if (DBG) {
                Log.d(TAG, "Current preferred BSSID is the same as the target one");
            }
            return false;
        }

        if (DBG) {
            Log.d(TAG, "target set to " + config.SSID + ":" + bssid);
        }
        mTargetRoamBSSID = bssid;
        mWifiConfigManager.saveWifiConfigBSSID(config, bssid);
        return true;
    }
    /**
     * Save the UID correctly depending on if this is a new or existing network.
     * @return true if operation is authorized, false otherwise
     */
    boolean recordUidIfAuthorized(WifiConfiguration config, int uid, boolean onlyAnnotate) {
        if (!mWifiConfigManager.isNetworkConfigured(config)) {
            config.creatorUid = uid;
            config.creatorName = mContext.getPackageManager().getNameForUid(uid);
        } else if (!mWifiConfigManager.canModifyNetwork(uid, config, onlyAnnotate)) {
            return false;
        }

        config.lastUpdateUid = uid;
        config.lastUpdateName = mContext.getPackageManager().getNameForUid(uid);

        return true;

    }

    /**
     * Checks to see if user has specified if the apps configuration is connectable.
     * If the user hasn't specified we query the user and return true.
     *
     * @param message The message to be deferred
     * @param netId Network id of the configuration to check against
     * @param allowOverride If true we won't defer to the user if the uid of the message holds the
     *                      CONFIG_OVERRIDE_PERMISSION
     * @return True if we are waiting for user feedback or netId is invalid. False otherwise.
     */
    boolean deferForUserInput(Message message, int netId, boolean allowOverride){
        final WifiConfiguration config = mWifiConfigManager.getWifiConfiguration(netId);

        // We can only evaluate saved configurations.
        if (config == null) {
            logd("deferForUserInput: configuration for netId=" + netId + " not stored");
            return true;
        }

        switch (config.userApproved) {
            case WifiConfiguration.USER_APPROVED:
            case WifiConfiguration.USER_BANNED:
                return false;
            case WifiConfiguration.USER_PENDING:
            default: // USER_UNSPECIFIED
               /* the intention was to ask user here; but a dialog box is   *
                * too invasive; so we are going to allow connection for now */
                config.userApproved = WifiConfiguration.USER_APPROVED;
                return false;
        }
    }

    private final IpManager mIpManager;

    private AlarmManager mAlarmManager;
    private PendingIntent mScanIntent;

    /* Tracks current frequency mode */
    private AtomicInteger mFrequencyBand = new AtomicInteger(WifiManager.WIFI_FREQUENCY_BAND_AUTO);

    // Channel for sending replies.
    private AsyncChannel mReplyChannel = new AsyncChannel();

    private WifiP2pServiceImpl mWifiP2pServiceImpl;

    // Used to initiate a connection with WifiP2pService
    private AsyncChannel mWifiP2pChannel;

    private WifiScanner mWifiScanner;

    private int mConnectionRequests = 0;
    private WifiNetworkFactory mNetworkFactory;
    private UntrustedWifiNetworkFactory mUntrustedNetworkFactory;
    private WifiNetworkAgent mNetworkAgent;

    private String[] mWhiteListedSsids = null;

    private byte[] mRssiRanges;

    // Keep track of various statistics, for retrieval by System Apps, i.e. under @SystemApi
    // We should really persist that into the networkHistory.txt file, and read it back when
    // WifiStateMachine starts up
    private WifiConnectionStatistics mWifiConnectionStatistics = new WifiConnectionStatistics();

    // Used to filter out requests we couldn't possibly satisfy.
    private final NetworkCapabilities mNetworkCapabilitiesFilter = new NetworkCapabilities();

    // Provide packet filter capabilities to ConnectivityService.
    private final NetworkMisc mNetworkMisc = new NetworkMisc();

    /* The base for wifi message types */
    static final int BASE = Protocol.BASE_WIFI;
    /* 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 succeeded */
    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;
    /* 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 failed */
    static final int CMD_START_AP_FAILURE                               = BASE + 22;
    /* Stop the soft access point */
    static final int CMD_STOP_AP                                        = BASE + 23;
    /* Soft access point teardown is completed. */
    static final int CMD_AP_STOPPED                                     = BASE + 24;

    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;
    /* Get available frequencies */
    static final int CMD_GET_CAPABILITY_FREQ                            = BASE + 60;
    /* Get adaptors */
    static final int CMD_GET_SUPPORTED_FEATURES                         = BASE + 61;
    /* Get configured networks with real preSharedKey */
    static final int CMD_GET_PRIVILEGED_CONFIGURED_NETWORKS             = BASE + 62;
    /* Get Link Layer Stats thru HAL */
    static final int CMD_GET_LINK_LAYER_STATS                           = BASE + 63;
    /* Supplicant commands after driver start*/
    /* Initiate a scan */
    static final int CMD_START_SCAN                                     = BASE + 71;
    /* Set operational mode. CONNECT, SCAN ONLY, SCAN_ONLY with Wi-Fi off mode */
    static final int CMD_SET_OPERATIONAL_MODE                           = BASE + 72;
    /* Disconnect from a network */
    static final int CMD_DISCONNECT                                     = BASE + 73;
    /* Reconnect to a network */
    static final int CMD_RECONNECT                                      = BASE + 74;
    /* Reassociate to a network */
    static final int CMD_REASSOCIATE                                    = BASE + 75;
    /* Get Connection Statistis */
    static final int CMD_GET_CONNECTION_STATISTICS                      = 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;
    /* Enables RSSI poll */
    static final int CMD_ENABLE_RSSI_POLL                               = BASE + 82;
    /* RSSI poll */
    static final int CMD_RSSI_POLL                                      = BASE + 83;
    /* Enable suspend mode optimizations in the driver */
    static final int CMD_SET_SUSPEND_OPT_ENABLED                        = BASE + 86;
    /* Delayed NETWORK_DISCONNECT */
    static final int CMD_DELAYED_NETWORK_DISCONNECT                     = 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;
    /* Test network Disconnection NETWORK_DISCONNECT */
    static final int CMD_TEST_NETWORK_DISCONNECT                        = BASE + 89;

    private int testNetworkDisconnectCounter = 0;

    /* Set the frequency band */
    static final int CMD_SET_FREQUENCY_BAND                             = BASE + 90;
    /* Enable TDLS on a specific MAC address */
    static final int CMD_ENABLE_TDLS                                    = BASE + 92;
    /* DHCP/IP configuration watchdog */
    static final int CMD_OBTAINING_IP_ADDRESS_WATCHDOG_TIMER            = BASE + 93;

    /**
     * Watchdog for protecting against b/16823537
     * Leave time for 4-way handshake to succeed
     */
    static final int ROAM_GUARD_TIMER_MSEC = 15000;

    int roamWatchdogCount = 0;
    /* Roam state watchdog */
    static final int CMD_ROAM_WATCHDOG_TIMER                            = BASE + 94;
    /* Screen change intent handling */
    static final int CMD_SCREEN_STATE_CHANGED                           = BASE + 95;

    /* Disconnecting state watchdog */
    static final int CMD_DISCONNECTING_WATCHDOG_TIMER                   = BASE + 96;

    /* Remove a packages associated configrations */
    static final int CMD_REMOVE_APP_CONFIGURATIONS                      = BASE + 97;

    /* Disable an ephemeral network */
    static final int CMD_DISABLE_EPHEMERAL_NETWORK                      = BASE + 98;

    /* Get matching network */
    static final int CMD_GET_MATCHING_CONFIG                            = BASE + 99;

    /* alert from firmware */
    static final int CMD_FIRMWARE_ALERT                                 = BASE + 100;

    /* SIM is removed; reset any cached data for it */
    static final int CMD_RESET_SIM_NETWORKS                             = BASE + 101;

    /* OSU APIs */
    static final int CMD_ADD_PASSPOINT_MO                               = BASE + 102;
    static final int CMD_MODIFY_PASSPOINT_MO                            = BASE + 103;
    static final int CMD_QUERY_OSU_ICON                                 = BASE + 104;

    /* try to match a provider with current network */
    static final int CMD_MATCH_PROVIDER_NETWORK                         = BASE + 105;

    /**
     * Make this timer 40 seconds, which is about the normal DHCP timeout.
     * In no valid case, the WiFiStateMachine should remain stuck in ObtainingIpAddress
     * for more than 30 seconds.
     */
    static final int OBTAINING_IP_ADDRESS_GUARD_TIMER_MSEC = 40000;

    int obtainingIpWatchdogCount = 0;

    /* Commands from/to the SupplicantStateTracker */
    /* Reset the supplicant state tracker */
    static final int CMD_RESET_SUPPLICANT_STATE                         = BASE + 111;

    int disconnectingWatchdogCount = 0;
    static final int DISCONNECTING_GUARD_TIMER_MSEC = 5000;

    /* P2p commands */
    /* We are ok with no response here since we wont do much with it anyway */
    public static final int CMD_ENABLE_P2P                              = BASE + 131;
    /* In order to shut down supplicant cleanly, we wait till p2p has
     * been disabled */
    public static final int CMD_DISABLE_P2P_REQ                         = BASE + 132;
    public static final int CMD_DISABLE_P2P_RSP                         = BASE + 133;

    public static final int CMD_BOOT_COMPLETED                          = BASE + 134;

    /* We now have a valid IP configuration. */
    static final int CMD_IP_CONFIGURATION_SUCCESSFUL                    = BASE + 138;
    /* We no longer have a valid IP configuration. */
    static final int CMD_IP_CONFIGURATION_LOST                          = BASE + 139;
    /* Link configuration (IP address, DNS, ...) changes notified via netlink */
    static final int CMD_UPDATE_LINKPROPERTIES                          = BASE + 140;

    /* Supplicant is trying to associate to a given BSSID */
    static final int CMD_TARGET_BSSID                                   = BASE + 141;

    /* Reload all networks and reconnect */
    static final int CMD_RELOAD_TLS_AND_RECONNECT                       = BASE + 142;

    static final int CMD_AUTO_CONNECT                                   = BASE + 143;

    private static final int NETWORK_STATUS_UNWANTED_DISCONNECT         = 0;
    private static final int NETWORK_STATUS_UNWANTED_VALIDATION_FAILED  = 1;
    private static final int NETWORK_STATUS_UNWANTED_DISABLE_AUTOJOIN   = 2;

    static final int CMD_UNWANTED_NETWORK                               = BASE + 144;

    static final int CMD_AUTO_ROAM                                      = BASE + 145;

    static final int CMD_AUTO_SAVE_NETWORK                              = BASE + 146;

    static final int CMD_ASSOCIATED_BSSID                               = BASE + 147;

    static final int CMD_NETWORK_STATUS                                 = BASE + 148;

    /* A layer 3 neighbor on the Wi-Fi link became unreachable. */
    static final int CMD_IP_REACHABILITY_LOST                           = BASE + 149;

    /* Remove a packages associated configrations */
    static final int CMD_REMOVE_USER_CONFIGURATIONS                     = BASE + 152;

    static final int CMD_ACCEPT_UNVALIDATED                             = BASE + 153;

    /* used to log if PNO was started */
    static final int CMD_UPDATE_ASSOCIATED_SCAN_PERMISSION              = BASE + 158;

    /* used to offload sending IP packet */
    static final int CMD_START_IP_PACKET_OFFLOAD                        = BASE + 160;

    /* used to stop offload sending IP packet */
    static final int CMD_STOP_IP_PACKET_OFFLOAD                         = BASE + 161;

    /* used to start rssi monitoring in hw */
    static final int CMD_START_RSSI_MONITORING_OFFLOAD                  = BASE + 162;

    /* used to stop rssi moniroting in hw */
    static final int CMD_STOP_RSSI_MONITORING_OFFLOAD                   = BASE + 163;

    /* used to indicated RSSI threshold breach in hw */
    static final int CMD_RSSI_THRESHOLD_BREACH                          = BASE + 164;

    /* used to indicate that the foreground user was switched */
    static final int CMD_USER_SWITCH                                    = BASE + 165;

    /* Enable/Disable WifiConnectivityManager */
    static final int CMD_ENABLE_WIFI_CONNECTIVITY_MANAGER               = BASE + 166;

    /* Enable/Disable AutoJoin when associated */
    static final int CMD_ENABLE_AUTOJOIN_WHEN_ASSOCIATED                = BASE + 167;

    /**
     * Used to handle messages bounced between WifiStateMachine and IpManager.
     */
    static final int CMD_IPV4_PROVISIONING_SUCCESS                      = BASE + 200;
    static final int CMD_IPV4_PROVISIONING_FAILURE                      = BASE + 201;

    /* Push a new APF program to the HAL */
    static final int CMD_INSTALL_PACKET_FILTER                          = BASE + 202;

    /* Enable/disable fallback packet filtering */
    static final int CMD_SET_FALLBACK_PACKET_FILTERING                  = BASE + 203;

    /* Enable/disable Neighbor Discovery offload functionality. */
    static final int CMD_CONFIG_ND_OFFLOAD                              = BASE + 204;

    // For message logging.
    private static final Class[] sMessageClasses = {
            AsyncChannel.class, WifiStateMachine.class, DhcpClient.class };
    private static final SparseArray<String> sSmToString =
            MessageUtils.findMessageNames(sMessageClasses);


    /* Wifi state machine modes of operation */
    /* CONNECT_MODE - connect to any 'known' AP when it becomes available */
    public static final int CONNECT_MODE = 1;
    /* SCAN_ONLY_MODE - don't connect to any APs; scan, but only while apps hold lock */
    public static final int SCAN_ONLY_MODE = 2;
    /* SCAN_ONLY_WITH_WIFI_OFF - scan, but don't connect to any APs */
    public static final int SCAN_ONLY_WITH_WIFI_OFF_MODE = 3;

    private static final int SUCCESS = 1;
    private static final int FAILURE = -1;

    /* Tracks if suspend optimizations need to be disabled by DHCP,
     * screen or due to high perf mode.
     * When any of them needs to disable it, we keep the suspend optimizations
     * disabled
     */
    private int mSuspendOptNeedsDisabled = 0;

    private static final int SUSPEND_DUE_TO_DHCP = 1;
    private static final int SUSPEND_DUE_TO_HIGH_PERF = 1 << 1;
    private static final int SUSPEND_DUE_TO_SCREEN = 1 << 2;

    /* Tracks if user has enabled suspend optimizations through settings */
    private AtomicBoolean mUserWantsSuspendOpt = new AtomicBoolean(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.Global#WIFI_FRAMEWORK_SCAN_INTERVAL_MS} can
     * override this.
     */
    private final int mDefaultFrameworkScanIntervalMs;


    /**
     * Scan period for the NO_NETWORKS_PERIIDOC_SCAN_FEATURE
     */
    private final int mNoNetworksPeriodicScan;

    /**
     * Supplicant scan interval in milliseconds.
     * Comes from {@link Settings.Global#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;

    int mRunningBeaconCount = 0;

    /* Default parent state */
    private State mDefaultState = new DefaultState();
    /* Temporary initial state */
    private State mInitialState = new InitialState();
    /* 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();
    /* Wait until p2p is disabled
     * This is a special state which is entered right after we exit out of DriverStartedState
     * before transitioning to another state.
     */
    private State mWaitForP2pDisableState = new WaitForP2pDisableState();
    /* 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();
    /* Connected with IP addr */
    private State mConnectedState = new ConnectedState();
    /* Roaming */
    private State mRoamingState = new RoamingState();
    /* 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 state */
    private State mSoftApState = new SoftApState();

    public static class SimAuthRequestData {
        int networkId;
        int protocol;
        String ssid;
        // EAP-SIM: data[] contains the 3 rand, one for each of the 3 challenges
        // EAP-AKA/AKA': data[] contains rand & authn couple for the single challenge
        String[] data;
    }

    /**
     * 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 static final int SCAN_REQUEST = 0;

    /**
     * Work source to use to blame usage on the WiFi service
     */
    public static final WorkSource WIFI_WORK_SOURCE = new WorkSource(Process.WIFI_UID);

    /**
     * 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;

    private final String mTcpBufferSizes;

    // Used for debug and stats gathering
    private static int sScanAlarmIntentCount = 0;

    private static final int sFrameworkMinScanIntervalSaneValue = 10000;

    private long mGScanStartTimeMilli;
    private long mGScanPeriodMilli;

    private FrameworkFacade mFacade;

    private final BackupManagerProxy mBackupManagerProxy;

    private int mSystemUiUid = -1;

    public WifiStateMachine(Context context, FrameworkFacade facade, Looper looper,
                            UserManager userManager, WifiInjector wifiInjector,
                            BackupManagerProxy backupManagerProxy,
                            WifiCountryCode countryCode) {
        super("WifiStateMachine", looper);
        mWifiInjector = wifiInjector;
        mWifiMetrics = mWifiInjector.getWifiMetrics();
        mWifiLastResortWatchdog = wifiInjector.getWifiLastResortWatchdog();
        mClock = wifiInjector.getClock();
        mPropertyService = wifiInjector.getPropertyService();
        mBuildProperties = wifiInjector.getBuildProperties();
        mContext = context;
        mFacade = facade;
        mWifiNative = WifiNative.getWlanNativeInterface();
        mBackupManagerProxy = backupManagerProxy;

        // TODO refactor WifiNative use of context out into it's own class
        mWifiNative.initContext(mContext);
        mInterfaceName = mWifiNative.getInterfaceName();
        mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_WIFI, 0, NETWORKTYPE, "");
        mBatteryStats = IBatteryStats.Stub.asInterface(mFacade.getService(
                BatteryStats.SERVICE_NAME));

        IBinder b = mFacade.getService(Context.NETWORKMANAGEMENT_SERVICE);
        mNwService = INetworkManagementService.Stub.asInterface(b);

        mP2pSupported = mContext.getPackageManager().hasSystemFeature(
                PackageManager.FEATURE_WIFI_DIRECT);

        mWifiConfigManager = mFacade.makeWifiConfigManager(context, mWifiNative, facade,
                mWifiInjector.getClock(), userManager, mWifiInjector.getKeyStore());

        mWifiMonitor = WifiMonitor.getInstance();

        boolean enableFirmwareLogs = mContext.getResources().getBoolean(
                R.bool.config_wifi_enable_wifi_firmware_debugging);

        if (enableFirmwareLogs) {
            mWifiLogger = facade.makeRealLogger(mContext, this, mWifiNative, mBuildProperties);
        } else {
            mWifiLogger = facade.makeBaseLogger();
        }

        mWifiInfo = new WifiInfo();
        mWifiQualifiedNetworkSelector = new WifiQualifiedNetworkSelector(mWifiConfigManager,
                mContext, mWifiInfo, mWifiInjector.getClock());
        mSupplicantStateTracker = mFacade.makeSupplicantStateTracker(
                context, mWifiConfigManager, getHandler());

        mLinkProperties = new LinkProperties();

        IBinder s1 = mFacade.getService(Context.WIFI_P2P_SERVICE);
        mWifiP2pServiceImpl = (WifiP2pServiceImpl) IWifiP2pManager.Stub.asInterface(s1);

        mNetworkInfo.setIsAvailable(false);
        mLastBssid = null;
        mLastNetworkId = WifiConfiguration.INVALID_NETWORK_ID;
        mLastSignalLevel = -1;

        mIpManager = mFacade.makeIpManager(mContext, mInterfaceName, new IpManagerCallback());
        mIpManager.setMulticastFilter(true);

        mAlarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);

        // Make sure the interval is not configured less than 10 seconds
        int period = mContext.getResources().getInteger(
                R.integer.config_wifi_framework_scan_interval);
        if (period < sFrameworkMinScanIntervalSaneValue) {
            period = sFrameworkMinScanIntervalSaneValue;
        }
        mDefaultFrameworkScanIntervalMs = period;

        mNoNetworksPeriodicScan = mContext.getResources().getInteger(
                R.integer.config_wifi_no_network_periodic_scan_interval);

        mBackgroundScanSupported = mContext.getResources().getBoolean(
                R.bool.config_wifi_background_scan_support);

        mPrimaryDeviceType = mContext.getResources().getString(
                R.string.config_wifi_p2p_device_type);

        mCountryCode = countryCode;

        mUserWantsSuspendOpt.set(mFacade.getIntegerSetting(mContext,
                Settings.Global.WIFI_SUSPEND_OPTIMIZATIONS_ENABLED, 1) == 1);

        mNetworkCapabilitiesFilter.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
        mNetworkCapabilitiesFilter.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
        mNetworkCapabilitiesFilter.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);
        mNetworkCapabilitiesFilter.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED);
        mNetworkCapabilitiesFilter.setLinkUpstreamBandwidthKbps(1024 * 1024);
        mNetworkCapabilitiesFilter.setLinkDownstreamBandwidthKbps(1024 * 1024);
        // TODO - needs to be a bit more dynamic
        mDfltNetworkCapabilities = new NetworkCapabilities(mNetworkCapabilitiesFilter);

        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        mContext.registerReceiver(
                new BroadcastReceiver() {
                    @Override
                    public void onReceive(Context context, Intent intent) {
                        String action = intent.getAction();

                        if (action.equals(Intent.ACTION_SCREEN_ON)) {
                            sendMessage(CMD_SCREEN_STATE_CHANGED, 1);
                        } else if (action.equals(Intent.ACTION_SCREEN_OFF)) {
                            sendMessage(CMD_SCREEN_STATE_CHANGED, 0);
                        }
                    }
                }, filter);

        mContext.getContentResolver().registerContentObserver(Settings.Global.getUriFor(
                        Settings.Global.WIFI_SUSPEND_OPTIMIZATIONS_ENABLED), false,
                new ContentObserver(getHandler()) {
                    @Override
                    public void onChange(boolean selfChange) {
                        mUserWantsSuspendOpt.set(mFacade.getIntegerSetting(mContext,
                                Settings.Global.WIFI_SUSPEND_OPTIMIZATIONS_ENABLED, 1) == 1);
                    }
                });

        mContext.registerReceiver(
                new BroadcastReceiver() {
                    @Override
                    public void onReceive(Context context, Intent intent) {
                        sendMessage(CMD_BOOT_COMPLETED);
                    }
                },
                new IntentFilter(Intent.ACTION_BOOT_COMPLETED));

        PowerManager powerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
        mWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, getName());

        mSuspendWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WifiSuspend");
        mSuspendWakeLock.setReferenceCounted(false);

        mTcpBufferSizes = mContext.getResources().getString(
                com.android.internal.R.string.config_wifi_tcp_buffers);

        // CHECKSTYLE:OFF IndentationCheck
        addState(mDefaultState);
            addState(mInitialState, 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(mConnectedState, mL2ConnectedState);
                            addState(mRoamingState, mL2ConnectedState);
                        addState(mDisconnectingState, mConnectModeState);
                        addState(mDisconnectedState, mConnectModeState);
                        addState(mWpsRunningState, mConnectModeState);
                addState(mWaitForP2pDisableState, mSupplicantStartedState);
                addState(mDriverStoppingState, mSupplicantStartedState);
                addState(mDriverStoppedState, mSupplicantStartedState);
            addState(mSupplicantStoppingState, mDefaultState);
            addState(mSoftApState, mDefaultState);
        // CHECKSTYLE:ON IndentationCheck

        setInitialState(mInitialState);

        setLogRecSize(NUM_LOG_RECS_NORMAL);
        setLogOnlyTransitions(false);

        //start the state machine
        start();

        mWifiMonitor.registerHandler(mInterfaceName, CMD_TARGET_BSSID, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, CMD_ASSOCIATED_BSSID, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.ANQP_DONE_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.ASSOCIATION_REJECTION_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.AUTHENTICATION_FAILURE_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.DRIVER_HUNG_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.GAS_QUERY_DONE_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.GAS_QUERY_START_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.HS20_REMEDIATION_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.NETWORK_CONNECTION_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.NETWORK_DISCONNECTION_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.RX_HS20_ANQP_ICON_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SCAN_FAILED_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SCAN_RESULTS_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SSID_REENABLED, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SSID_TEMP_DISABLED, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SUP_CONNECTION_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SUP_DISCONNECTION_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT,
                getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SUP_REQUEST_IDENTITY, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.SUP_REQUEST_SIM_AUTH, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.WPS_FAIL_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.WPS_OVERLAP_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.WPS_SUCCESS_EVENT, getHandler());
        mWifiMonitor.registerHandler(mInterfaceName, WifiMonitor.WPS_TIMEOUT_EVENT, getHandler());

        final Intent intent = new Intent(WifiManager.WIFI_SCAN_AVAILABLE);
        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
        intent.putExtra(WifiManager.EXTRA_SCAN_AVAILABLE, WIFI_STATE_DISABLED);
        mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);

        try {
            mSystemUiUid = mContext.getPackageManager().getPackageUidAsUser("com.android.systemui",
                    PackageManager.MATCH_SYSTEM_ONLY, UserHandle.USER_SYSTEM);
        } catch (PackageManager.NameNotFoundException e) {
            loge("Unable to resolve SystemUI's UID.");
        }

        mVerboseLoggingLevel = mFacade.getIntegerSetting(
                mContext, Settings.Global.WIFI_VERBOSE_LOGGING_ENABLED, 0);
        updateLoggingLevel();
    }

    class IpManagerCallback extends IpManager.Callback {
        @Override
        public void onPreDhcpAction() {
            sendMessage(DhcpClient.CMD_PRE_DHCP_ACTION);
        }

        @Override
        public void onPostDhcpAction() {
            sendMessage(DhcpClient.CMD_POST_DHCP_ACTION);
        }

        @Override
        public void onNewDhcpResults(DhcpResults dhcpResults) {
            if (dhcpResults != null) {
                sendMessage(CMD_IPV4_PROVISIONING_SUCCESS, dhcpResults);
            } else {
                sendMessage(CMD_IPV4_PROVISIONING_FAILURE);
                mWifiLastResortWatchdog.noteConnectionFailureAndTriggerIfNeeded(getTargetSsid(),
                        mTargetRoamBSSID,
                        WifiLastResortWatchdog.FAILURE_CODE_DHCP);
            }
        }

        @Override
        public void onProvisioningSuccess(LinkProperties newLp) {
            sendMessage(CMD_UPDATE_LINKPROPERTIES, newLp);
            sendMessage(CMD_IP_CONFIGURATION_SUCCESSFUL);
        }

        @Override
        public void onProvisioningFailure(LinkProperties newLp) {
            sendMessage(CMD_IP_CONFIGURATION_LOST);
        }

        @Override
        public void onLinkPropertiesChange(LinkProperties newLp) {
            sendMessage(CMD_UPDATE_LINKPROPERTIES, newLp);
        }

        @Override
        public void onReachabilityLost(String logMsg) {
            sendMessage(CMD_IP_REACHABILITY_LOST, logMsg);
        }

        @Override
        public void installPacketFilter(byte[] filter) {
            sendMessage(CMD_INSTALL_PACKET_FILTER, filter);
        }

        @Override
        public void setFallbackMulticastFilter(boolean enabled) {
            sendMessage(CMD_SET_FALLBACK_PACKET_FILTERING, enabled);
        }

        @Override
        public void setNeighborDiscoveryOffload(boolean enabled) {
            sendMessage(CMD_CONFIG_ND_OFFLOAD, (enabled ? 1 : 0));
        }
    }

    private void stopIpManager() {
        /* Restore power save and suspend optimizations */
        handlePostDhcpSetup();
        mIpManager.stop();
    }

    PendingIntent getPrivateBroadcast(String action, int requestCode) {
        Intent intent = new Intent(action, null);
        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
        intent.setPackage("android");
        return mFacade.getBroadcast(mContext, requestCode, intent, 0);
    }

    int getVerboseLoggingLevel() {
        return mVerboseLoggingLevel;
    }

    void enableVerboseLogging(int verbose) {
        if (mVerboseLoggingLevel == verbose) {
            // We are already at the desired verbosity, avoid resetting StateMachine log records by
            // returning here until underlying bug is fixed (b/28027593)
            return;
        }
        mVerboseLoggingLevel = verbose;
        mFacade.setIntegerSetting(
                mContext, Settings.Global.WIFI_VERBOSE_LOGGING_ENABLED, verbose);
        updateLoggingLevel();
    }

    /**
     * Set wpa_supplicant log level using |mVerboseLoggingLevel| flag.
     */
    void setSupplicantLogLevel() {
        if (mVerboseLoggingLevel > 0) {
            mWifiNative.setSupplicantLogLevel("DEBUG");
        } else {
            mWifiNative.setSupplicantLogLevel("INFO");
        }
    }

    void updateLoggingLevel() {
        if (mVerboseLoggingLevel > 0) {
            DBG = true;
            setLogRecSize(ActivityManager.isLowRamDeviceStatic()
                    ? NUM_LOG_RECS_VERBOSE_LOW_MEMORY : NUM_LOG_RECS_VERBOSE);
        } else {
            DBG = false;
            setLogRecSize(NUM_LOG_RECS_NORMAL);
        }
        configureVerboseHalLogging(mVerboseLoggingLevel > 0);
        setSupplicantLogLevel();
        mCountryCode.enableVerboseLogging(mVerboseLoggingLevel);
        mWifiLogger.startLogging(DBG);
        mWifiMonitor.enableVerboseLogging(mVerboseLoggingLevel);
        mWifiNative.enableVerboseLogging(mVerboseLoggingLevel);
        mWifiConfigManager.enableVerboseLogging(mVerboseLoggingLevel);
        mSupplicantStateTracker.enableVerboseLogging(mVerboseLoggingLevel);
        mWifiQualifiedNetworkSelector.enableVerboseLogging(mVerboseLoggingLevel);
        if (mWifiConnectivityManager != null) {
            mWifiConnectivityManager.enableVerboseLogging(mVerboseLoggingLevel);
        }
    }

    private static final String SYSTEM_PROPERTY_LOG_CONTROL_WIFIHAL = "log.tag.WifiHAL";
    private static final String LOGD_LEVEL_DEBUG = "D";
    private static final String LOGD_LEVEL_VERBOSE = "V";
    private void configureVerboseHalLogging(boolean enableVerbose) {
        if (mBuildProperties.isUserBuild()) {  // Verbose HAL logging not supported on user builds.
            return;
        }
        mPropertyService.set(SYSTEM_PROPERTY_LOG_CONTROL_WIFIHAL,
                enableVerbose ? LOGD_LEVEL_VERBOSE : LOGD_LEVEL_DEBUG);
    }

    long mLastScanPermissionUpdate = 0;
    boolean mConnectedModeGScanOffloadStarted = false;
    // Don't do a G-scan enable/re-enable cycle more than once within 20seconds
    // The function updateAssociatedScanPermission() can be called quite frequently, hence
    // we want to throttle the GScan Stop->Start transition
    static final long SCAN_PERMISSION_UPDATE_THROTTLE_MILLI = 20000;
    void updateAssociatedScanPermission() {
    }

    private int mAggressiveHandover = 0;

    int getAggressiveHandover() {
        return mAggressiveHandover;
    }

    void enableAggressiveHandover(int enabled) {
        mAggressiveHandover = enabled;
    }

    public void clearANQPCache() {
        mWifiConfigManager.trimANQPCache(true);
    }

    public void setAllowScansWithTraffic(int enabled) {
        mWifiConfigManager.mAlwaysEnableScansWhileAssociated.set(enabled);
    }

    public int getAllowScansWithTraffic() {
        return mWifiConfigManager.mAlwaysEnableScansWhileAssociated.get();
    }

    /*
     * Dynamically turn on/off if switching networks while connected is allowd.
     */
    public boolean setEnableAutoJoinWhenAssociated(boolean enabled) {
        sendMessage(CMD_ENABLE_AUTOJOIN_WHEN_ASSOCIATED, enabled ? 1 : 0);
        return true;
    }

    public boolean getEnableAutoJoinWhenAssociated() {
        return mWifiConfigManager.getEnableAutoJoinWhenAssociated();
    }

    private boolean setRandomMacOui() {
        String oui = mContext.getResources().getString(R.string.config_wifi_random_mac_oui);
        if (TextUtils.isEmpty(oui)) {
            oui = GOOGLE_OUI;
        }
        String[] ouiParts = oui.split("-");
        byte[] ouiBytes = new byte[3];
        ouiBytes[0] = (byte) (Integer.parseInt(ouiParts[0], 16) & 0xFF);
        ouiBytes[1] = (byte) (Integer.parseInt(ouiParts[1], 16) & 0xFF);
        ouiBytes[2] = (byte) (Integer.parseInt(ouiParts[2], 16) & 0xFF);

        logd("Setting OUI to " + oui);
        return mWifiNative.setScanningMacOui(ouiBytes);
    }

    /**
     * ******************************************************
     * 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;
    }

    /**
     * Initiate a wifi scan. If workSource is not null, blame is given to it, otherwise blame is
     * given to callingUid.
     *
     * @param callingUid The uid initiating the wifi scan. Blame will be given here unless
     *                   workSource is specified.
     * @param workSource If not null, blame is given to workSource.
     * @param settings   Scan settings, see {@link ScanSettings}.
     */
    public void startScan(int callingUid, int scanCounter,
                          ScanSettings settings, WorkSource workSource) {
        Bundle bundle = new Bundle();
        bundle.putParcelable(CUSTOMIZED_SCAN_SETTING, settings);
        bundle.putParcelable(CUSTOMIZED_SCAN_WORKSOURCE, workSource);
        bundle.putLong(SCAN_REQUEST_TIME, System.currentTimeMillis());
        sendMessage(CMD_START_SCAN, callingUid, scanCounter, bundle);
    }

    // called from BroadcastListener

    /**
     * Start reading new scan data
     * Data comes in as:
     * "scancount=5\n"
     * "nextcount=5\n"
     * "apcount=3\n"
     * "trunc\n" (optional)
     * "bssid=...\n"
     * "ssid=...\n"
     * "freq=...\n" (in Mhz)
     * "level=...\n"
     * "dist=...\n" (in cm)
     * "distsd=...\n" (standard deviation, in cm)
     * "===="
     * "bssid=...\n"
     * etc
     * "===="
     * "bssid=...\n"
     * etc
     * "%%%%"
     * "apcount=2\n"
     * "bssid=...\n"
     * etc
     * "%%%%
     * etc
     * "----"
     */
    private final static boolean DEBUG_PARSE = false;

    private long mDisconnectedTimeStamp = 0;

    public long getDisconnectedTimeMilli() {
        if (getCurrentState() == mDisconnectedState
                && mDisconnectedTimeStamp != 0) {
            long now_ms = System.currentTimeMillis();
            return now_ms - mDisconnectedTimeStamp;
        }
        return 0;
    }

    // Last connect attempt is used to prevent scan requests:
    //  - for a period of 10 seconds after attempting to connect
    private long lastConnectAttemptTimestamp = 0;
    private Set<Integer> lastScanFreqs = null;

    // For debugging, keep track of last message status handling
    // TODO, find an equivalent mechanism as part of parent class
    private static int MESSAGE_HANDLING_STATUS_PROCESSED = 2;
    private static int MESSAGE_HANDLING_STATUS_OK = 1;
    private static int MESSAGE_HANDLING_STATUS_UNKNOWN = 0;
    private static int MESSAGE_HANDLING_STATUS_REFUSED = -1;
    private static int MESSAGE_HANDLING_STATUS_FAIL = -2;
    private static int MESSAGE_HANDLING_STATUS_OBSOLETE = -3;
    private static int MESSAGE_HANDLING_STATUS_DEFERRED = -4;
    private static int MESSAGE_HANDLING_STATUS_DISCARD = -5;
    private static int MESSAGE_HANDLING_STATUS_LOOPED = -6;
    private static int MESSAGE_HANDLING_STATUS_HANDLING_ERROR = -7;

    private int messageHandlingStatus = 0;

    //TODO: this is used only to track connection attempts, however the link state and packet per
    //TODO: second logic should be folded into that
    private boolean checkOrDeferScanAllowed(Message msg) {
        long now = System.currentTimeMillis();
        if (lastConnectAttemptTimestamp != 0 && (now - lastConnectAttemptTimestamp) < 10000) {
            Message dmsg = Message.obtain(msg);
            sendMessageDelayed(dmsg, 11000 - (now - lastConnectAttemptTimestamp));
            return false;
        }
        return true;
    }

    private int mOnTime = 0;
    private int mTxTime = 0;
    private int mRxTime = 0;

    private int mOnTimeScreenStateChange = 0;
    private long lastOntimeReportTimeStamp = 0;
    private long lastScreenStateChangeTimeStamp = 0;
    private int mOnTimeLastReport = 0;
    private int mTxTimeLastReport = 0;
    private int mRxTimeLastReport = 0;

    private long lastLinkLayerStatsUpdate = 0;

    String reportOnTime() {
        long now = System.currentTimeMillis();
        StringBuilder sb = new StringBuilder();
        // Report stats since last report
        int on = mOnTime - mOnTimeLastReport;
        mOnTimeLastReport = mOnTime;
        int tx = mTxTime - mTxTimeLastReport;
        mTxTimeLastReport = mTxTime;
        int rx = mRxTime - mRxTimeLastReport;
        mRxTimeLastReport = mRxTime;
        int period = (int) (now - lastOntimeReportTimeStamp);
        lastOntimeReportTimeStamp = now;
        sb.append(String.format("[on:%d tx:%d rx:%d period:%d]", on, tx, rx, period));
        // Report stats since Screen State Changed
        on = mOnTime - mOnTimeScreenStateChange;
        period = (int) (now - lastScreenStateChangeTimeStamp);
        sb.append(String.format(" from screen [on:%d period:%d]", on, period));
        return sb.toString();
    }

    WifiLinkLayerStats getWifiLinkLayerStats(boolean dbg) {
        WifiLinkLayerStats stats = null;
        if (mWifiLinkLayerStatsSupported > 0) {
            String name = "wlan0";
            stats = mWifiNative.getWifiLinkLayerStats(name);
            if (name != null && stats == null && mWifiLinkLayerStatsSupported > 0) {
                mWifiLinkLayerStatsSupported -= 1;
            } else if (stats != null) {
                lastLinkLayerStatsUpdate = System.currentTimeMillis();
                mOnTime = stats.on_time;
                mTxTime = stats.tx_time;
                mRxTime = stats.rx_time;
                mRunningBeaconCount = stats.beacon_rx;
            }
        }
        if (stats == null || mWifiLinkLayerStatsSupported <= 0) {
            long mTxPkts = mFacade.getTxPackets(mInterfaceName);
            long mRxPkts = mFacade.getRxPackets(mInterfaceName);
            mWifiInfo.updatePacketRates(mTxPkts, mRxPkts);
        } else {
            mWifiInfo.updatePacketRates(stats);
        }
        return stats;
    }

    int startWifiIPPacketOffload(int slot, KeepalivePacketData packetData, int intervalSeconds) {
        int ret = mWifiNative.startSendingOffloadedPacket(slot, packetData, intervalSeconds * 1000);
        if (ret != 0) {
            loge("startWifiIPPacketOffload(" + slot + ", " + intervalSeconds +
                    "): hardware error " + ret);
            return ConnectivityManager.PacketKeepalive.ERROR_HARDWARE_ERROR;
        } else {
            return ConnectivityManager.PacketKeepalive.SUCCESS;
        }
    }

    int stopWifiIPPacketOffload(int slot) {
        int ret = mWifiNative.stopSendingOffloadedPacket(slot);
        if (ret != 0) {
            loge("stopWifiIPPacketOffload(" + slot + "): hardware error " + ret);
            return ConnectivityManager.PacketKeepalive.ERROR_HARDWARE_ERROR;
        } else {
            return ConnectivityManager.PacketKeepalive.SUCCESS;
        }
    }

    int startRssiMonitoringOffload(byte maxRssi, byte minRssi) {
        return mWifiNative.startRssiMonitoring(maxRssi, minRssi, WifiStateMachine.this);
    }

    int stopRssiMonitoringOffload() {
        return mWifiNative.stopRssiMonitoring();
    }

    private void handleScanRequest(Message message) {
        ScanSettings settings = null;
        WorkSource workSource = null;

        // unbundle parameters
        Bundle bundle = (Bundle) message.obj;

        if (bundle != null) {
            settings = bundle.getParcelable(CUSTOMIZED_SCAN_SETTING);
            workSource = bundle.getParcelable(CUSTOMIZED_SCAN_WORKSOURCE);
        }

        Set<Integer> freqs = null;
        if (settings != null && settings.channelSet != null) {
            freqs = new HashSet<Integer>();
            for (WifiChannel channel : settings.channelSet) {
                freqs.add(channel.freqMHz);
            }
        }

        // Retrieve the list of hidden networkId's to scan for.
        Set<Integer> hiddenNetworkIds = mWifiConfigManager.getHiddenConfiguredNetworkIds();

        // call wifi native to start the scan
        if (startScanNative(freqs, hiddenNetworkIds, workSource)) {
            // a full scan covers everything, clearing scan request buffer
            if (freqs == null)
                mBufferedScanMsg.clear();
            messageHandlingStatus = MESSAGE_HANDLING_STATUS_OK;
            if (workSource != null) {
                // External worksource was passed along the scan request,
                // hence always send a broadcast
                mSendScanResultsBroadcast = true;
            }
            return;
        }

        // if reach here, scan request is rejected

        if (!mIsScanOngoing) {
            // if rejection is NOT due to ongoing scan (e.g. bad scan parameters),

            // discard this request and pop up the next one
            if (mBufferedScanMsg.size() > 0) {
                sendMessage(mBufferedScanMsg.remove());
            }
            messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD;
        } else if (!mIsFullScanOngoing) {
            // if rejection is due to an ongoing scan, and the ongoing one is NOT a full scan,
            // buffer the scan request to make sure specified channels will be scanned eventually
            if (freqs == null)
                mBufferedScanMsg.clear();
            if (mBufferedScanMsg.size() < SCAN_REQUEST_BUFFER_MAX_SIZE) {
                Message msg = obtainMessage(CMD_START_SCAN,
                        message.arg1, message.arg2, bundle);
                mBufferedScanMsg.add(msg);
            } else {
                // if too many requests in buffer, combine them into a single full scan
                bundle = new Bundle();
                bundle.putParcelable(CUSTOMIZED_SCAN_SETTING, null);
                bundle.putParcelable(CUSTOMIZED_SCAN_WORKSOURCE, workSource);
                Message msg = obtainMessage(CMD_START_SCAN, message.arg1, message.arg2, bundle);
                mBufferedScanMsg.clear();
                mBufferedScanMsg.add(msg);
            }
            messageHandlingStatus = MESSAGE_HANDLING_STATUS_LOOPED;
        } else {
            // mIsScanOngoing and mIsFullScanOngoing
            messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL;
        }
    }


    // TODO this is a temporary measure to bridge between WifiScanner and WifiStateMachine until
    // scan functionality is refactored out of WifiStateMachine.
    /**
     * return true iff scan request is accepted
     */
    private boolean startScanNative(final Set<Integer> freqs, Set<Integer> hiddenNetworkIds,
            WorkSource workSource) {
        WifiScanner.ScanSettings settings = new WifiScanner.ScanSettings();
        if (freqs == null) {
            settings.band = WifiScanner.WIFI_BAND_BOTH_WITH_DFS;
        } else {
            settings.band = WifiScanner.WIFI_BAND_UNSPECIFIED;
            int index = 0;
            settings.channels = new WifiScanner.ChannelSpec[freqs.size()];
            for (Integer freq : freqs) {
                settings.channels[index++] = new WifiScanner.ChannelSpec(freq);
            }
        }
        settings.reportEvents = WifiScanner.REPORT_EVENT_AFTER_EACH_SCAN
                | WifiScanner.REPORT_EVENT_FULL_SCAN_RESULT;
        if (hiddenNetworkIds != null && hiddenNetworkIds.size() > 0) {
            int i = 0;
            settings.hiddenNetworkIds = new int[hiddenNetworkIds.size()];
            for (Integer netId : hiddenNetworkIds) {
                settings.hiddenNetworkIds[i++] = netId;
            }
        }
        WifiScanner.ScanListener nativeScanListener = new WifiScanner.ScanListener() {
                // ignore all events since WifiStateMachine is registered for the supplicant events
                public void onSuccess() {
                }
                public void onFailure(int reason, String description) {
                    mIsScanOngoing = false;
                    mIsFullScanOngoing = false;
                }
                public void onResults(WifiScanner.ScanData[] results) {
                }
                public void onFullResult(ScanResult fullScanResult) {
                }
                public void onPeriodChanged(int periodInMs) {
                }
            };
        mWifiScanner.startScan(settings, nativeScanListener, workSource);
        mIsScanOngoing = true;
        mIsFullScanOngoing = (freqs == null);
        lastScanFreqs = freqs;
        return true;
    }

    /**
     * TODO: doc
     */
    public void setSupplicantRunning(boolean enable) {
        if (enable) {
            sendMessage(CMD_START_SUPPLICANT);
        } else {
            sendMessage(CMD_STOP_SUPPLICANT);
        }
    }

    /**
     * TODO: doc
     */
    public void setHostApRunning(WifiConfiguration wifiConfig, boolean enable) {
        if (enable) {
            sendMessage(CMD_START_AP, wifiConfig);
        } else {
            sendMessage(CMD_STOP_AP);
        }
    }

    public void setWifiApConfiguration(WifiConfiguration config) {
        mWifiApConfigStore.setApConfiguration(config);
    }

    public WifiConfiguration syncGetWifiApConfiguration() {
        return mWifiApConfigStore.getApConfiguration();
    }

    /**
     * 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]";
        }
    }

    public boolean isConnected() {
        return getCurrentState() == mConnectedState;
    }

    public boolean isDisconnected() {
        return getCurrentState() == mDisconnectedState;
    }

    public boolean isSupplicantTransientState() {
        SupplicantState SupplicantState = mWifiInfo.getSupplicantState();
        if (SupplicantState == SupplicantState.ASSOCIATING
                || SupplicantState == SupplicantState.AUTHENTICATING
                || SupplicantState == SupplicantState.FOUR_WAY_HANDSHAKE
                || SupplicantState == SupplicantState.GROUP_HANDSHAKE) {

            if (DBG) {
                Log.d(TAG, "Supplicant is under transient state: " + SupplicantState);
            }
            return true;
        } else {
            if (DBG) {
                Log.d(TAG, "Supplicant is under steady state: " + SupplicantState);
            }
        }

        return false;
    }

    public boolean isLinkDebouncing() {
        return linkDebouncing;
    }

    /**
     * Get status information for the current connection, if any.
     *
     * @return a {@link WifiInfo} object containing information about the current connection
     */
    public WifiInfo syncRequestConnectionInfo() {
        return getWiFiInfoForUid(Binder.getCallingUid());
    }

    public WifiInfo getWifiInfo() {
        return mWifiInfo;
    }

    public DhcpResults syncGetDhcpResults() {
        synchronized (mDhcpResultsLock) {
            return new DhcpResults(mDhcpResults);
        }
    }

    /**
     * TODO: doc
     */
    public void setDriverStart(boolean enable) {
        if (enable) {
            sendMessage(CMD_START_DRIVER);
        } else {
            sendMessage(CMD_STOP_DRIVER);
        }
    }

    /**
     * TODO: doc
     */
    public void setOperationalMode(int mode) {
        if (DBG) log("setting operational mode to " + String.valueOf(mode));
        sendMessage(CMD_SET_OPERATIONAL_MODE, mode, 0);
    }

    /**
     * Allow tests to confirm the operational mode for WSM.
     */
    @VisibleForTesting
    protected int getOperationalModeForTest() {
        return mOperationalMode;
    }

    /**
     * TODO: doc
     */
    public List<ScanResult> syncGetScanResultsList() {
        synchronized (mScanResultsLock) {
            List<ScanResult> scanList = new ArrayList<ScanResult>();
            for (ScanDetail result : mScanResults) {
                scanList.add(new ScanResult(result.getScanResult()));
            }
            return scanList;
        }
    }

    public int syncAddPasspointManagementObject(AsyncChannel channel, String managementObject) {
        Message resultMsg =
                channel.sendMessageSynchronously(CMD_ADD_PASSPOINT_MO, managementObject);
        int result = resultMsg.arg1;
        resultMsg.recycle();
        return result;
    }

    public int syncModifyPasspointManagementObject(AsyncChannel channel, String fqdn,
                                                   List<PasspointManagementObjectDefinition>
                                                           managementObjectDefinitions) {
        Bundle bundle = new Bundle();
        bundle.putString("FQDN", fqdn);
        bundle.putParcelableList("MOS", managementObjectDefinitions);
        Message resultMsg = channel.sendMessageSynchronously(CMD_MODIFY_PASSPOINT_MO, bundle);
        int result = resultMsg.arg1;
        resultMsg.recycle();
        return result;
    }

    public boolean syncQueryPasspointIcon(AsyncChannel channel, long bssid, String fileName) {
        Bundle bundle = new Bundle();
        bundle.putLong("BSSID", bssid);
        bundle.putString("FILENAME", fileName);
        Message resultMsg = channel.sendMessageSynchronously(CMD_QUERY_OSU_ICON, bundle);
        int result = resultMsg.arg1;
        resultMsg.recycle();
        return result == 1;
    }

    public int matchProviderWithCurrentNetwork(AsyncChannel channel, String fqdn) {
        Message resultMsg = channel.sendMessageSynchronously(CMD_MATCH_PROVIDER_NETWORK, fqdn);
        int result = resultMsg.arg1;
        resultMsg.recycle();
        return result;
    }

    /**
     * Deauthenticate and set the re-authentication hold off time for the current network
     * @param holdoff hold off time in milliseconds
     * @param ess set if the hold off pertains to an ESS rather than a BSS
     */
    public void deauthenticateNetwork(AsyncChannel channel, long holdoff, boolean ess) {
        // TODO: This needs an implementation
    }

    public void disableEphemeralNetwork(String SSID) {
        if (SSID != null) {
            sendMessage(CMD_DISABLE_EPHEMERAL_NETWORK, SSID);
        }
    }

    /**
     * Disconnect from Access Point
     */
    public void disconnectCommand() {
        sendMessage(CMD_DISCONNECT);
    }

    public void disconnectCommand(int uid, int reason) {
        sendMessage(CMD_DISCONNECT, uid, reason);
    }

    /**
     * Initiate a reconnection to AP
     */
    public void reconnectCommand() {
        sendMessage(CMD_RECONNECT);
    }

    /**
     * Initiate a re-association to AP
     */
    public void reassociateCommand() {
        sendMessage(CMD_REASSOCIATE);
    }

    /**
     * Reload networks and then reconnect; helps load correct data for TLS networks
     */

    public void reloadTlsNetworksAndReconnect() {
        sendMessage(CMD_RELOAD_TLS_AND_RECONNECT);
    }

    /**
     * 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;
    }

    /**
     * Get configured networks synchronously
     *
     * @param channel
     * @return
     */

    public List<WifiConfiguration> syncGetConfiguredNetworks(int uuid, AsyncChannel channel) {
        Message resultMsg = channel.sendMessageSynchronously(CMD_GET_CONFIGURED_NETWORKS, uuid);
        List<WifiConfiguration> result = (List<WifiConfiguration>) resultMsg.obj;
        resultMsg.recycle();
        return result;
    }

    public List<WifiConfiguration> syncGetPrivilegedConfiguredNetwork(AsyncChannel channel) {
        Message resultMsg = channel.sendMessageSynchronously(
                CMD_GET_PRIVILEGED_CONFIGURED_NETWORKS);
        List<WifiConfiguration> result = (List<WifiConfiguration>) resultMsg.obj;
        resultMsg.recycle();
        return result;
    }

    public WifiConfiguration syncGetMatchingWifiConfig(ScanResult scanResult, AsyncChannel channel) {
        Message resultMsg = channel.sendMessageSynchronously(CMD_GET_MATCHING_CONFIG, scanResult);
        return (WifiConfiguration) resultMsg.obj;
    }

    /**
     * Get connection statistics synchronously
     *
     * @param channel
     * @return
     */

    public WifiConnectionStatistics syncGetConnectionStatistics(AsyncChannel channel) {
        Message resultMsg = channel.sendMessageSynchronously(CMD_GET_CONNECTION_STATISTICS);
        WifiConnectionStatistics result = (WifiConnectionStatistics) resultMsg.obj;
        resultMsg.recycle();
        return result;
    }

    /**
     * Get adaptors synchronously
     */

    public int syncGetSupportedFeatures(AsyncChannel channel) {
        Message resultMsg = channel.sendMessageSynchronously(CMD_GET_SUPPORTED_FEATURES);
        int supportedFeatureSet = resultMsg.arg1;
        resultMsg.recycle();
        return supportedFeatureSet;
    }

    /**
     * Get link layers stats for adapter synchronously
     */
    public WifiLinkLayerStats syncGetLinkLayerStats(AsyncChannel channel) {
        Message resultMsg = channel.sendMessageSynchronously(CMD_GET_LINK_LAYER_STATS);
        WifiLinkLayerStats result = (WifiLinkLayerStats) 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;
    }

    /**
     * Retrieves a WPS-NFC configuration token for the specified network
     *
     * @return a hex string representation of the WPS-NFC configuration token
     */
    public String syncGetWpsNfcConfigurationToken(int netId) {
        return mWifiNative.getNfcWpsConfigurationToken(netId);
    }

    /**
     * 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(CMD_BLACKLIST_NETWORK, bssid);
    }

    /**
     * Clear the blacklist list
     */
    public void clearBlacklist() {
        sendMessage(CMD_CLEAR_BLACKLIST);
    }

    public void enableRssiPolling(boolean enabled) {
        sendMessage(CMD_ENABLE_RSSI_POLL, enabled ? 1 : 0, 0);
    }

    public void enableAllNetworks() {
        sendMessage(CMD_ENABLE_ALL_NETWORKS);
    }

    /**
     * Start filtering Multicast v4 packets
     */
    public void startFilteringMulticastPackets() {
        mIpManager.setMulticastFilter(true);
    }

    /**
     * Stop filtering Multicast v4 packets
     */
    public void stopFilteringMulticastPackets() {
        mIpManager.setMulticastFilter(false);
    }

    /**
     * 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(CMD_SET_HIGH_PERF_MODE, enable ? 1 : 0, 0);
    }


    /**
     * reset cached SIM credential data
     */
    public synchronized void resetSimAuthNetworks(boolean simPresent) {
        sendMessage(CMD_RESET_SIM_NETWORKS, simPresent ? 1 : 0);
    }

    /**
     * Get Network object of current wifi network
     * @return Network object of current wifi network
     */
    public Network getCurrentNetwork() {
        if (mNetworkAgent != null) {
            return new Network(mNetworkAgent.netId);
        } else {
            return null;
        }
    }


    /**
     * 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.Global.putInt(mContext.getContentResolver(),
                    Settings.Global.WIFI_FREQUENCY_BAND,
                    band);
        }
        sendMessage(CMD_SET_FREQUENCY_BAND, band, 0);
    }

    /**
     * Enable TDLS for a specific MAC address
     */
    public void enableTdls(String remoteMacAddress, boolean enable) {
        int enabler = enable ? 1 : 0;
        sendMessage(CMD_ENABLE_TDLS, enabler, 0, remoteMacAddress);
    }

    /**
     * Returns the operational frequency band
     */
    public int getFrequencyBand() {
        return mFrequencyBand.get();
    }

    /**
     * Returns the wifi configuration file
     */
    public String getConfigFile() {
        return mWifiConfigManager.getConfigFile();
    }

    /**
     * Send a message indicating bluetooth adapter connection state changed
     */
    public void sendBluetoothAdapterStateChange(int state) {
        sendMessage(CMD_BLUETOOTH_ADAPTER_STATE_CHANGE, state, 0);
    }

    /**
     * Send a message indicating a package has been uninstalled.
     */
    public void removeAppConfigs(String packageName, int uid) {
        // Build partial AppInfo manually - package may not exist in database any more
        ApplicationInfo ai = new ApplicationInfo();
        ai.packageName = packageName;
        ai.uid = uid;
        sendMessage(CMD_REMOVE_APP_CONFIGURATIONS, ai);
    }

    /**
     * Send a message indicating a user has been removed.
     */
    public void removeUserConfigs(int userId) {
        sendMessage(CMD_REMOVE_USER_CONFIGURATIONS, userId);
    }

    /**
     * Save configuration on supplicant
     *
     * @return {@code true} if the operation succeeds, {@code false} otherwise
     * <p/>
     * 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) {
            }
        }
    }

    public void dumpIpManager(FileDescriptor fd, PrintWriter pw, String[] args) {
        mIpManager.dump(fd, pw, args);
    }

    @Override
    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        super.dump(fd, pw, args);
        mSupplicantStateTracker.dump(fd, pw, args);
        pw.println("mLinkProperties " + mLinkProperties);
        pw.println("mWifiInfo " + mWifiInfo);
        pw.println("mDhcpResults " + mDhcpResults);
        pw.println("mNetworkInfo " + mNetworkInfo);
        pw.println("mLastSignalLevel " + mLastSignalLevel);
        pw.println("mLastBssid " + mLastBssid);
        pw.println("mLastNetworkId " + mLastNetworkId);
        pw.println("mOperationalMode " + mOperationalMode);
        pw.println("mUserWantsSuspendOpt " + mUserWantsSuspendOpt);
        pw.println("mSuspendOptNeedsDisabled " + mSuspendOptNeedsDisabled);
        pw.println("Supplicant status " + mWifiNative.status(true));
        if (mCountryCode.getCountryCodeSentToDriver() != null) {
            pw.println("CountryCode sent to driver " + mCountryCode.getCountryCodeSentToDriver());
        } else {
            if (mCountryCode.getCountryCode() != null) {
                pw.println("CountryCode: " +
                        mCountryCode.getCountryCode() + " was not sent to driver");
            } else {
                pw.println("CountryCode was not initialized");
            }
        }
        pw.println("mConnectedModeGScanOffloadStarted " + mConnectedModeGScanOffloadStarted);
        pw.println("mGScanPeriodMilli " + mGScanPeriodMilli);
        if (mWhiteListedSsids != null && mWhiteListedSsids.length > 0) {
            pw.println("SSID whitelist :" );
            for (int i=0; i < mWhiteListedSsids.length; i++) {
                pw.println("       " + mWhiteListedSsids[i]);
            }
        }
        if (mNetworkFactory != null) {
            mNetworkFactory.dump(fd, pw, args);
        } else {
            pw.println("mNetworkFactory is not initialized");
        }

        if (mUntrustedNetworkFactory != null) {
            mUntrustedNetworkFactory.dump(fd, pw, args);
        } else {
            pw.println("mUntrustedNetworkFactory is not initialized");
        }
        pw.println("Wlan Wake Reasons:" + mWifiNative.getWlanWakeReasonCount());
        pw.println();
        updateWifiMetrics();
        mWifiMetrics.dump(fd, pw, args);
        pw.println();

        mWifiConfigManager.dump(fd, pw, args);
        pw.println();
        mWifiLogger.captureBugReportData(WifiLogger.REPORT_REASON_USER_ACTION);
        mWifiLogger.dump(fd, pw, args);
        mWifiQualifiedNetworkSelector.dump(fd, pw, args);
        dumpIpManager(fd, pw, args);
        if (mWifiConnectivityManager != null) {
            mWifiConnectivityManager.dump(fd, pw, args);
        }
    }

    public void handleUserSwitch(int userId) {
        sendMessage(CMD_USER_SWITCH, userId);
    }

    /**
     * ******************************************************
     * Internal private functions
     * ******************************************************
     */

    private void logStateAndMessage(Message message, State state) {
        messageHandlingStatus = 0;
        if (DBG) {
            logd(" " + state.getClass().getSimpleName() + " " + getLogRecString(message));
        }
    }

    /**
     * helper, prints the milli time since boot wi and w/o suspended time
     */
    String printTime() {
        StringBuilder sb = new StringBuilder();
        sb.append(" rt=").append(SystemClock.uptimeMillis());
        sb.append("/").append(SystemClock.elapsedRealtime());
        return sb.toString();
    }

    /**
     * Return the additional string to be logged by LogRec, default
     *
     * @param msg that was processed
     * @return information to be logged as a String
     */
    protected String getLogRecString(Message msg) {
        WifiConfiguration config;
        Long now;
        String report;
        String key;
        StringBuilder sb = new StringBuilder();
        if (mScreenOn) {
            sb.append("!");
        }
        if (messageHandlingStatus != MESSAGE_HANDLING_STATUS_UNKNOWN) {
            sb.append("(").append(messageHandlingStatus).append(")");
        }
        sb.append(smToString(msg));
        if (msg.sendingUid > 0 && msg.sendingUid != Process.WIFI_UID) {
            sb.append(" uid=" + msg.sendingUid);
        }
        sb.append(" ").append(printTime());
        switch (msg.what) {
            case CMD_UPDATE_ASSOCIATED_SCAN_PERMISSION:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                sb.append(" autojoinAllowed=");
                sb.append(mWifiConfigManager.getEnableAutoJoinWhenAssociated());
                sb.append(" withTraffic=").append(getAllowScansWithTraffic());
                sb.append(" tx=").append(mWifiInfo.txSuccessRate);
                sb.append("/").append(mWifiConfigManager.MAX_TX_PACKET_FOR_FULL_SCANS);
                sb.append(" rx=").append(mWifiInfo.rxSuccessRate);
                sb.append("/").append(mWifiConfigManager.MAX_RX_PACKET_FOR_FULL_SCANS);
                sb.append(" -> ").append(mConnectedModeGScanOffloadStarted);
                break;
            case CMD_START_SCAN:
                now = System.currentTimeMillis();
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                sb.append(" ic=");
                sb.append(Integer.toString(sScanAlarmIntentCount));
                if (msg.obj != null) {
                    Bundle bundle = (Bundle) msg.obj;
                    Long request = bundle.getLong(SCAN_REQUEST_TIME, 0);
                    if (request != 0) {
                        sb.append(" proc(ms):").append(now - request);
                    }
                }
                if (mIsScanOngoing) sb.append(" onGoing");
                if (mIsFullScanOngoing) sb.append(" full");
                sb.append(" rssi=").append(mWifiInfo.getRssi());
                sb.append(" f=").append(mWifiInfo.getFrequency());
                sb.append(" sc=").append(mWifiInfo.score);
                sb.append(" link=").append(mWifiInfo.getLinkSpeed());
                sb.append(String.format(" tx=%.1f,", mWifiInfo.txSuccessRate));
                sb.append(String.format(" %.1f,", mWifiInfo.txRetriesRate));
                sb.append(String.format(" %.1f ", mWifiInfo.txBadRate));
                sb.append(String.format(" rx=%.1f", mWifiInfo.rxSuccessRate));
                if (lastScanFreqs != null) {
                    sb.append(" list=");
                    for(int freq : lastScanFreqs) {
                        sb.append(freq).append(",");
                    }
                }
                report = reportOnTime();
                if (report != null) {
                    sb.append(" ").append(report);
                }
                break;
            case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                StateChangeResult stateChangeResult = (StateChangeResult) msg.obj;
                if (stateChangeResult != null) {
                    sb.append(stateChangeResult.toString());
                }
                break;
            case WifiManager.SAVE_NETWORK:
            case WifiStateMachine.CMD_AUTO_SAVE_NETWORK:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (lastSavedConfigurationAttempt != null) {
                    sb.append(" ").append(lastSavedConfigurationAttempt.configKey());
                    sb.append(" nid=").append(lastSavedConfigurationAttempt.networkId);
                    if (lastSavedConfigurationAttempt.hiddenSSID) {
                        sb.append(" hidden");
                    }
                    if (lastSavedConfigurationAttempt.preSharedKey != null
                            && !lastSavedConfigurationAttempt.preSharedKey.equals("*")) {
                        sb.append(" hasPSK");
                    }
                    if (lastSavedConfigurationAttempt.ephemeral) {
                        sb.append(" ephemeral");
                    }
                    if (lastSavedConfigurationAttempt.selfAdded) {
                        sb.append(" selfAdded");
                    }
                    sb.append(" cuid=").append(lastSavedConfigurationAttempt.creatorUid);
                    sb.append(" suid=").append(lastSavedConfigurationAttempt.lastUpdateUid);
                }
                break;
            case WifiManager.FORGET_NETWORK:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (lastForgetConfigurationAttempt != null) {
                    sb.append(" ").append(lastForgetConfigurationAttempt.configKey());
                    sb.append(" nid=").append(lastForgetConfigurationAttempt.networkId);
                    if (lastForgetConfigurationAttempt.hiddenSSID) {
                        sb.append(" hidden");
                    }
                    if (lastForgetConfigurationAttempt.preSharedKey != null) {
                        sb.append(" hasPSK");
                    }
                    if (lastForgetConfigurationAttempt.ephemeral) {
                        sb.append(" ephemeral");
                    }
                    if (lastForgetConfigurationAttempt.selfAdded) {
                        sb.append(" selfAdded");
                    }
                    sb.append(" cuid=").append(lastForgetConfigurationAttempt.creatorUid);
                    sb.append(" suid=").append(lastForgetConfigurationAttempt.lastUpdateUid);
                    WifiConfiguration.NetworkSelectionStatus netWorkSelectionStatus =
                            lastForgetConfigurationAttempt.getNetworkSelectionStatus();
                    sb.append(" ajst=").append(
                            netWorkSelectionStatus.getNetworkStatusString());
                }
                break;
            case WifiMonitor.ASSOCIATION_REJECTION_EVENT:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                String bssid = (String) msg.obj;
                if (bssid != null && bssid.length() > 0) {
                    sb.append(" ");
                    sb.append(bssid);
                }
                sb.append(" blacklist=" + Boolean.toString(didBlackListBSSID));
                break;
            case WifiMonitor.SCAN_RESULTS_EVENT:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (mScanResults != null) {
                    sb.append(" found=");
                    sb.append(mScanResults.size());
                }
                sb.append(" known=").append(mNumScanResultsKnown);
                sb.append(" got=").append(mNumScanResultsReturned);
                sb.append(String.format(" bcn=%d", mRunningBeaconCount));
                sb.append(String.format(" con=%d", mConnectionRequests));
                key = mWifiConfigManager.getLastSelectedConfiguration();
                if (key != null) {
                    sb.append(" last=").append(key);
                }
                break;
            case WifiMonitor.SCAN_FAILED_EVENT:
                break;
            case WifiMonitor.NETWORK_CONNECTION_EVENT:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                sb.append(" ").append(mLastBssid);
                sb.append(" nid=").append(mLastNetworkId);
                config = getCurrentWifiConfiguration();
                if (config != null) {
                    sb.append(" ").append(config.configKey());
                }
                key = mWifiConfigManager.getLastSelectedConfiguration();
                if (key != null) {
                    sb.append(" last=").append(key);
                }
                break;
            case CMD_TARGET_BSSID:
            case CMD_ASSOCIATED_BSSID:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (msg.obj != null) {
                    sb.append(" BSSID=").append((String) msg.obj);
                }
                if (mTargetRoamBSSID != null) {
                    sb.append(" Target=").append(mTargetRoamBSSID);
                }
                sb.append(" roam=").append(Boolean.toString(mAutoRoaming));
                break;
            case WifiMonitor.NETWORK_DISCONNECTION_EVENT:
                if (msg.obj != null) {
                    sb.append(" ").append((String) msg.obj);
                }
                sb.append(" nid=").append(msg.arg1);
                sb.append(" reason=").append(msg.arg2);
                if (mLastBssid != null) {
                    sb.append(" lastbssid=").append(mLastBssid);
                }
                if (mWifiInfo.getFrequency() != -1) {
                    sb.append(" freq=").append(mWifiInfo.getFrequency());
                    sb.append(" rssi=").append(mWifiInfo.getRssi());
                }
                if (linkDebouncing) {
                    sb.append(" debounce");
                }
                break;
            case WifiMonitor.SSID_TEMP_DISABLED:
            case WifiMonitor.SSID_REENABLED:
                sb.append(" nid=").append(msg.arg1);
                if (msg.obj != null) {
                    sb.append(" ").append((String) msg.obj);
                }
                config = getCurrentWifiConfiguration();
                if (config != null) {
                    WifiConfiguration.NetworkSelectionStatus netWorkSelectionStatus =
                            config.getNetworkSelectionStatus();
                    sb.append(" cur=").append(config.configKey());
                    sb.append(" ajst=").append(netWorkSelectionStatus.getNetworkStatusString());
                    if (config.selfAdded) {
                        sb.append(" selfAdded");
                    }
                    if (config.status != 0) {
                        sb.append(" st=").append(config.status);
                        sb.append(" rs=").append(
                                netWorkSelectionStatus.getNetworkDisableReasonString());
                    }
                    if (config.lastConnected != 0) {
                        now = System.currentTimeMillis();
                        sb.append(" lastconn=").append(now - config.lastConnected).append("(ms)");
                    }
                    if (mLastBssid != null) {
                        sb.append(" lastbssid=").append(mLastBssid);
                    }
                    if (mWifiInfo.getFrequency() != -1) {
                        sb.append(" freq=").append(mWifiInfo.getFrequency());
                        sb.append(" rssi=").append(mWifiInfo.getRssi());
                        sb.append(" bssid=").append(mWifiInfo.getBSSID());
                    }
                }
                break;
            case CMD_RSSI_POLL:
            case CMD_UNWANTED_NETWORK:
            case WifiManager.RSSI_PKTCNT_FETCH:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (mWifiInfo.getSSID() != null)
                    if (mWifiInfo.getSSID() != null)
                        sb.append(" ").append(mWifiInfo.getSSID());
                if (mWifiInfo.getBSSID() != null)
                    sb.append(" ").append(mWifiInfo.getBSSID());
                sb.append(" rssi=").append(mWifiInfo.getRssi());
                sb.append(" f=").append(mWifiInfo.getFrequency());
                sb.append(" sc=").append(mWifiInfo.score);
                sb.append(" link=").append(mWifiInfo.getLinkSpeed());
                sb.append(String.format(" tx=%.1f,", mWifiInfo.txSuccessRate));
                sb.append(String.format(" %.1f,", mWifiInfo.txRetriesRate));
                sb.append(String.format(" %.1f ", mWifiInfo.txBadRate));
                sb.append(String.format(" rx=%.1f", mWifiInfo.rxSuccessRate));
                sb.append(String.format(" bcn=%d", mRunningBeaconCount));
                report = reportOnTime();
                if (report != null) {
                    sb.append(" ").append(report);
                }
                if (mWifiScoreReport != null) {
                    sb.append(mWifiScoreReport.getReport());
                }
                if (mConnectedModeGScanOffloadStarted) {
                    sb.append(" offload-started periodMilli " + mGScanPeriodMilli);
                } else {
                    sb.append(" offload-stopped");
                }
                break;
            case CMD_AUTO_CONNECT:
            case WifiManager.CONNECT_NETWORK:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                config = mWifiConfigManager.getWifiConfiguration(msg.arg1);
                if (config != null) {
                    sb.append(" ").append(config.configKey());
                    if (config.visibility != null) {
                        sb.append(" ").append(config.visibility.toString());
                    }
                }
                if (mTargetRoamBSSID != null) {
                    sb.append(" ").append(mTargetRoamBSSID);
                }
                sb.append(" roam=").append(Boolean.toString(mAutoRoaming));
                config = getCurrentWifiConfiguration();
                if (config != null) {
                    sb.append(config.configKey());
                    if (config.visibility != null) {
                        sb.append(" ").append(config.visibility.toString());
                    }
                }
                break;
            case CMD_AUTO_ROAM:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                ScanResult result = (ScanResult) msg.obj;
                if (result != null) {
                    now = System.currentTimeMillis();
                    sb.append(" bssid=").append(result.BSSID);
                    sb.append(" rssi=").append(result.level);
                    sb.append(" freq=").append(result.frequency);
                    if (result.seen > 0 && result.seen < now) {
                        sb.append(" seen=").append(now - result.seen);
                    } else {
                        // Somehow the timestamp for this scan result is inconsistent
                        sb.append(" !seen=").append(result.seen);
                    }
                }
                if (mTargetRoamBSSID != null) {
                    sb.append(" ").append(mTargetRoamBSSID);
                }
                sb.append(" roam=").append(Boolean.toString(mAutoRoaming));
                sb.append(" fail count=").append(Integer.toString(mRoamFailCount));
                break;
            case CMD_ADD_OR_UPDATE_NETWORK:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (msg.obj != null) {
                    config = (WifiConfiguration) msg.obj;
                    sb.append(" ").append(config.configKey());
                    sb.append(" prio=").append(config.priority);
                    sb.append(" status=").append(config.status);
                    if (config.BSSID != null) {
                        sb.append(" ").append(config.BSSID);
                    }
                    WifiConfiguration curConfig = getCurrentWifiConfiguration();
                    if (curConfig != null) {
                        if (curConfig.configKey().equals(config.configKey())) {
                            sb.append(" is current");
                        } else {
                            sb.append(" current=").append(curConfig.configKey());
                            sb.append(" prio=").append(curConfig.priority);
                            sb.append(" status=").append(curConfig.status);
                        }
                    }
                }
                break;
            case WifiManager.DISABLE_NETWORK:
            case CMD_ENABLE_NETWORK:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                key = mWifiConfigManager.getLastSelectedConfiguration();
                if (key != null) {
                    sb.append(" last=").append(key);
                }
                config = mWifiConfigManager.getWifiConfiguration(msg.arg1);
                if (config != null && (key == null || !config.configKey().equals(key))) {
                    sb.append(" target=").append(key);
                }
                break;
            case CMD_GET_CONFIGURED_NETWORKS:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                sb.append(" num=").append(mWifiConfigManager.getConfiguredNetworksSize());
                break;
            case DhcpClient.CMD_PRE_DHCP_ACTION:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                sb.append(" txpkts=").append(mWifiInfo.txSuccess);
                sb.append(",").append(mWifiInfo.txBad);
                sb.append(",").append(mWifiInfo.txRetries);
                break;
            case DhcpClient.CMD_POST_DHCP_ACTION:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (msg.arg1 == DhcpClient.DHCP_SUCCESS) {
                    sb.append(" OK ");
                } else if (msg.arg1 == DhcpClient.DHCP_FAILURE) {
                    sb.append(" FAIL ");
                }
                if (mLinkProperties != null) {
                    sb.append(" ");
                    sb.append(getLinkPropertiesSummary(mLinkProperties));
                }
                break;
            case WifiP2pServiceImpl.P2P_CONNECTION_CHANGED:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (msg.obj != null) {
                    NetworkInfo info = (NetworkInfo) msg.obj;
                    NetworkInfo.State state = info.getState();
                    NetworkInfo.DetailedState detailedState = info.getDetailedState();
                    if (state != null) {
                        sb.append(" st=").append(state);
                    }
                    if (detailedState != null) {
                        sb.append("/").append(detailedState);
                    }
                }
                break;
            case CMD_IP_CONFIGURATION_LOST:
                int count = -1;
                WifiConfiguration c = getCurrentWifiConfiguration();
                if (c != null) {
                    count = c.getNetworkSelectionStatus().getDisableReasonCounter(
                            WifiConfiguration.NetworkSelectionStatus.DISABLED_DHCP_FAILURE);
                }
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                sb.append(" failures: ");
                sb.append(Integer.toString(count));
                sb.append("/");
                sb.append(Integer.toString(mWifiConfigManager.getMaxDhcpRetries()));
                if (mWifiInfo.getBSSID() != null) {
                    sb.append(" ").append(mWifiInfo.getBSSID());
                }
                sb.append(String.format(" bcn=%d", mRunningBeaconCount));
                break;
            case CMD_UPDATE_LINKPROPERTIES:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                if (mLinkProperties != null) {
                    sb.append(" ");
                    sb.append(getLinkPropertiesSummary(mLinkProperties));
                }
                break;
            case CMD_IP_REACHABILITY_LOST:
                if (msg.obj != null) {
                    sb.append(" ").append((String) msg.obj);
                }
                break;
            case CMD_INSTALL_PACKET_FILTER:
                sb.append(" len=" + ((byte[])msg.obj).length);
                break;
            case CMD_SET_FALLBACK_PACKET_FILTERING:
                sb.append(" enabled=" + (boolean)msg.obj);
                break;
            case CMD_ROAM_WATCHDOG_TIMER:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                sb.append(" cur=").append(roamWatchdogCount);
                break;
            case CMD_DISCONNECTING_WATCHDOG_TIMER:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                sb.append(" cur=").append(disconnectingWatchdogCount);
                break;
            case CMD_START_RSSI_MONITORING_OFFLOAD:
            case CMD_STOP_RSSI_MONITORING_OFFLOAD:
            case CMD_RSSI_THRESHOLD_BREACH:
                sb.append(" rssi=");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" thresholds=");
                sb.append(Arrays.toString(mRssiRanges));
                break;
            case CMD_USER_SWITCH:
                sb.append(" userId=");
                sb.append(Integer.toString(msg.arg1));
                break;
            case CMD_IPV4_PROVISIONING_SUCCESS:
                sb.append(" ");
                if (msg.arg1 == DhcpClient.DHCP_SUCCESS) {
                    sb.append("DHCP_OK");
                } else if (msg.arg1 == CMD_STATIC_IP_SUCCESS) {
                    sb.append("STATIC_OK");
                } else {
                    sb.append(Integer.toString(msg.arg1));
                }
                break;
            case CMD_IPV4_PROVISIONING_FAILURE:
                sb.append(" ");
                if (msg.arg1 == DhcpClient.DHCP_FAILURE) {
                    sb.append("DHCP_FAIL");
                } else if (msg.arg1 == CMD_STATIC_IP_FAILURE) {
                    sb.append("STATIC_FAIL");
                } else {
                    sb.append(Integer.toString(msg.arg1));
                }
                break;
            default:
                sb.append(" ");
                sb.append(Integer.toString(msg.arg1));
                sb.append(" ");
                sb.append(Integer.toString(msg.arg2));
                break;
        }

        return sb.toString();
    }

    private void handleScreenStateChanged(boolean screenOn) {
        mScreenOn = screenOn;
        if (DBG) {
            logd(" handleScreenStateChanged Enter: screenOn=" + screenOn
                    + " mUserWantsSuspendOpt=" + mUserWantsSuspendOpt
                    + " state " + getCurrentState().getName()
                    + " suppState:" + mSupplicantStateTracker.getSupplicantStateName());
        }
        enableRssiPolling(screenOn);
        if (mUserWantsSuspendOpt.get()) {
            int shouldReleaseWakeLock = 0;
            if (screenOn) {
                sendMessage(CMD_SET_SUSPEND_OPT_ENABLED, 0, shouldReleaseWakeLock);
            } else {
                if (isConnected()) {
                    // Allow 2s for suspend optimizations to be set
                    mSuspendWakeLock.acquire(2000);
                    shouldReleaseWakeLock = 1;
                }
                sendMessage(CMD_SET_SUSPEND_OPT_ENABLED, 1, shouldReleaseWakeLock);
            }
        }
        mScreenBroadcastReceived.set(true);

        getWifiLinkLayerStats(false);
        mOnTimeScreenStateChange = mOnTime;
        lastScreenStateChangeTimeStamp = lastLinkLayerStatsUpdate;

        mWifiMetrics.setScreenState(screenOn);

        if (mWifiConnectivityManager != null) {
            mWifiConnectivityManager.handleScreenStateChanged(screenOn);
        }

        if (DBG) log("handleScreenStateChanged Exit: " + screenOn);
    }

    private void checkAndSetConnectivityInstance() {
        if (mCm == null) {
            mCm = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
        }
    }


    /**
     * Set the frequency band from the system setting value, if any.
     */
    private void setFrequencyBand() {
        int band = WifiManager.WIFI_FREQUENCY_BAND_AUTO;

        if (mWifiNative.setBand(band)) {
            mFrequencyBand.set(band);
            if (mWifiConnectivityManager != null) {
                mWifiConnectivityManager.setUserPreferredBand(band);
            }
            if (DBG) {
                logd("done set frequency band " + band);
            }
        } else {
            loge("Failed to set frequency band " + band);
        }
    }

    private void setSuspendOptimizationsNative(int reason, boolean enabled) {
        if (DBG) {
            log("setSuspendOptimizationsNative: " + reason + " " + enabled
                    + " -want " + mUserWantsSuspendOpt.get()
                    + " stack:" + Thread.currentThread().getStackTrace()[2].getMethodName()
                    + " - " + Thread.currentThread().getStackTrace()[3].getMethodName()
                    + " - " + Thread.currentThread().getStackTrace()[4].getMethodName()
                    + " - " + Thread.currentThread().getStackTrace()[5].getMethodName());
        }
        //mWifiNative.setSuspendOptimizations(enabled);

        if (enabled) {
            mSuspendOptNeedsDisabled &= ~reason;
            /* None of dhcp, screen or highperf need it disabled and user wants it enabled */
            if (mSuspendOptNeedsDisabled == 0 && mUserWantsSuspendOpt.get()) {
                if (DBG) {
                    log("setSuspendOptimizationsNative do it " + reason + " " + enabled
                            + " stack:" + Thread.currentThread().getStackTrace()[2].getMethodName()
                            + " - " + Thread.currentThread().getStackTrace()[3].getMethodName()
                            + " - " + Thread.currentThread().getStackTrace()[4].getMethodName()
                            + " - " + Thread.currentThread().getStackTrace()[5].getMethodName());
                }
                mWifiNative.setSuspendOptimizations(true);
            }
        } else {
            mSuspendOptNeedsDisabled |= reason;
            mWifiNative.setSuspendOptimizations(false);
        }
    }

    private void setSuspendOptimizations(int reason, boolean enabled) {
        if (DBG) log("setSuspendOptimizations: " + reason + " " + enabled);
        if (enabled) {
            mSuspendOptNeedsDisabled &= ~reason;
        } else {
            mSuspendOptNeedsDisabled |= reason;
        }
        if (DBG) log("mSuspendOptNeedsDisabled " + mSuspendOptNeedsDisabled);
    }

    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.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
    }

    private void setWifiApState(int wifiApState, int reason) {
        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);
        if (wifiApState == WifiManager.WIFI_AP_STATE_FAILED) {
            //only set reason number when softAP start failed
            intent.putExtra(WifiManager.EXTRA_WIFI_AP_FAILURE_REASON, reason);
        }

        mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
    }

    private void setScanResults() {
        mNumScanResultsKnown = 0;
        mNumScanResultsReturned = 0;

        ArrayList<ScanDetail> scanResults = mWifiNative.getScanResults();

        if (scanResults.isEmpty()) {
            mScanResults = new ArrayList<>();
            return;
        }

        mWifiConfigManager.trimANQPCache(false);

        boolean connected = mLastBssid != null;
        long activeBssid = 0L;
        if (connected) {
            try {
                activeBssid = Utils.parseMac(mLastBssid);
            } catch (IllegalArgumentException iae) {
                connected = false;
            }
        }

        synchronized (mScanResultsLock) {
            ScanDetail activeScanDetail = null;
            mScanResults = scanResults;
            mNumScanResultsReturned = mScanResults.size();
            for (ScanDetail resultDetail : mScanResults) {
                if (connected && resultDetail.getNetworkDetail().getBSSID() == activeBssid) {
                    if (activeScanDetail == null
                            || activeScanDetail.getNetworkDetail().getBSSID() != activeBssid
                            || activeScanDetail.getNetworkDetail().getANQPElements() == null) {
                        activeScanDetail = resultDetail;
                    }
                }
                // Cache DTIM values parsed from the beacon frame Traffic Indication Map (TIM)
                // Information Element (IE), into the associated WifiConfigurations. Most of the
                // time there is no TIM IE in the scan result (Probe Response instead of Beacon
                // Frame), these scanResult DTIM's are negative and ignored.
                // <TODO> Cache these per BSSID, since dtim can change vary
                NetworkDetail networkDetail = resultDetail.getNetworkDetail();
                if (networkDetail != null && networkDetail.getDtimInterval() > 0) {
                    List<WifiConfiguration> associatedWifiConfigurations =
                            mWifiConfigManager.getSavedNetworkFromScanDetail(resultDetail);
                    if (associatedWifiConfigurations != null) {
                        for (WifiConfiguration associatedConf : associatedWifiConfigurations) {
                            if (associatedConf != null) {
                                associatedConf.dtimInterval = networkDetail.getDtimInterval();
                            }
                        }
                    }
                }
            }
            mWifiConfigManager.setActiveScanDetail(activeScanDetail);
        }

        if (linkDebouncing) {
            // If debouncing, we dont re-select a SSID or BSSID hence
            // there is no need to call the network selection code
            // in WifiAutoJoinController, instead,
            // just try to reconnect to the same SSID by triggering a roam
            // The third parameter 1 means roam not from network selection but debouncing
            sendMessage(CMD_AUTO_ROAM, mLastNetworkId, 1, null);
        }
    }

    /*
     * Fetch RSSI, linkspeed, and frequency on current connection
     */
    private void fetchRssiLinkSpeedAndFrequencyNative() {
        Integer newRssi = null;
        Integer newLinkSpeed = null;
        Integer newFrequency = null;

        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]);
                    } else if (prop[0].equals("FREQUENCY")) {
                        newFrequency = Integer.parseInt(prop[1]);
                    }
                } catch (NumberFormatException e) {
                    //Ignore, defaults on rssi and linkspeed are assigned
                }
            }
        }

        if (DBG) {
            logd("fetchRssiLinkSpeedAndFrequencyNative rssi=" + newRssi +
                 " linkspeed=" + newLinkSpeed + " freq=" + newFrequency);
        }

        if (newRssi != null && newRssi > WifiInfo.INVALID_RSSI && newRssi < WifiInfo.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);
            /*
             * Log the rssi poll value in metrics
             */
            mWifiMetrics.incrementRssiPollRssiCount(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) {
                updateCapabilities(getCurrentWifiConfiguration());
                sendRssiChangeBroadcast(newRssi);
            }
            mLastSignalLevel = newSignalLevel;
        } else {
            mWifiInfo.setRssi(WifiInfo.INVALID_RSSI);
            updateCapabilities(getCurrentWifiConfiguration());
        }

        if (newLinkSpeed != null) {
            mWifiInfo.setLinkSpeed(newLinkSpeed);
        }
        if (newFrequency != null && newFrequency > 0) {
            if (ScanResult.is5GHz(newFrequency)) {
                mWifiConnectionStatistics.num5GhzConnected++;
            }
            if (ScanResult.is24GHz(newFrequency)) {
                mWifiConnectionStatistics.num24GhzConnected++;
            }
            mWifiInfo.setFrequency(newFrequency);
        }
        mWifiConfigManager.updateConfiguration(mWifiInfo);
    }

    // Polling has completed, hence we wont have a score anymore
    private void cleanWifiScore() {
        mWifiInfo.txBadRate = 0;
        mWifiInfo.txSuccessRate = 0;
        mWifiInfo.txRetriesRate = 0;
        mWifiInfo.rxSuccessRate = 0;
        mWifiScoreReport = null;
    }

    // Object holding most recent wifi score report and bad Linkspeed count
    WifiScoreReport mWifiScoreReport = null;

    public double getTxPacketRate() {
        return mWifiInfo.txSuccessRate;
    }

    public double getRxPacketRate() {
        return mWifiInfo.rxSuccessRate;
    }

    /**
     * Fetch TX packet counters on current connection
     */
    private void fetchPktcntNative(RssiPacketCountInfo info) {
        String pktcntPoll = mWifiNative.pktcntPoll();

        if (pktcntPoll != null) {
            String[] lines = pktcntPoll.split("\n");
            for (String line : lines) {
                String[] prop = line.split("=");
                if (prop.length < 2) continue;
                try {
                    if (prop[0].equals("TXGOOD")) {
                        info.txgood = Integer.parseInt(prop[1]);
                    } else if (prop[0].equals("TXBAD")) {
                        info.txbad = Integer.parseInt(prop[1]);
                    }
                } catch (NumberFormatException e) {
                    // Ignore
                }
            }
        }
    }

    private void updateLinkProperties(LinkProperties newLp) {
        if (DBG) {
            log("Link configuration changed for netId: " + mLastNetworkId
                    + " old: " + mLinkProperties + " new: " + newLp);
        }
        // We own this instance of LinkProperties because IpManager passes us a copy.
        mLinkProperties = newLp;
        if (mNetworkAgent != null) {
            mNetworkAgent.sendLinkProperties(mLinkProperties);
        }

        if (getNetworkDetailedState() == DetailedState.CONNECTED) {
            // If anything has changed and we're already connected, send out a notification.
            // TODO: Update all callers to use NetworkCallbacks and delete this.
            sendLinkConfigurationChangedBroadcast();
        }

        if (DBG) {
            StringBuilder sb = new StringBuilder();
            sb.append("updateLinkProperties nid: " + mLastNetworkId);
            sb.append(" state: " + getNetworkDetailedState());

            if (mLinkProperties != null) {
                sb.append(" ");
                sb.append(getLinkPropertiesSummary(mLinkProperties));
            }
            logd(sb.toString());
        }
    }

    /**
     * Clears all our link properties.
     */
    private void clearLinkProperties() {
        // Clear the link properties obtained from DHCP. The only caller of this
        // function has already called IpManager#stop(), which clears its state.
        synchronized (mDhcpResultsLock) {
            if (mDhcpResults != null) {
                mDhcpResults.clear();
            }
        }

        // Now clear the merged link properties.
        mLinkProperties.clear();
        if (mNetworkAgent != null) mNetworkAgent.sendLinkProperties(mLinkProperties);
    }

    /**
     * try to update default route MAC address.
     */
    private String updateDefaultRouteMacAddress(int timeout) {
        String address = null;
        for (RouteInfo route : mLinkProperties.getRoutes()) {
            if (route.isDefaultRoute() && route.hasGateway()) {
                InetAddress gateway = route.getGateway();
                if (gateway instanceof Inet4Address) {
                    if (DBG) {
                        logd("updateDefaultRouteMacAddress found Ipv4 default :"
                                + gateway.getHostAddress());
                    }
                    address = macAddressFromRoute(gateway.getHostAddress());
                    /* The gateway's MAC address is known */
                    if ((address == null) && (timeout > 0)) {
                        boolean reachable = false;
                        try {
                            reachable = gateway.isReachable(timeout);
                        } catch (Exception e) {
                            loge("updateDefaultRouteMacAddress exception reaching :"
                                    + gateway.getHostAddress());

                        } finally {
                            if (reachable == true) {

                                address = macAddressFromRoute(gateway.getHostAddress());
                                if (DBG) {
                                    logd("updateDefaultRouteMacAddress reachable (tried again) :"
                                            + gateway.getHostAddress() + " found " + address);
                                }
                            }
                        }
                    }
                    if (address != null) {
                        mWifiConfigManager.setDefaultGwMacAddress(mLastNetworkId, address);
                    }
                }
            }
        }
        return address;
    }

    void sendScanResultsAvailableBroadcast(boolean scanSucceeded) {
        Intent intent = new Intent(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
        intent.putExtra(WifiManager.EXTRA_RESULTS_UPDATED, scanSucceeded);
        mContext.sendBroadcastAsUser(intent, UserHandle.ALL);
    }

    private void sendRssiChangeBroadcast(final int newRssi) {
        try {
            mBatteryStats.noteWifiRssiChanged(newRssi);
        } catch (RemoteException e) {
            // Won't happen.
        }
        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.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
    }

    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) {
            // We no longer report MAC address to third-parties and our code does
            // not rely on this broadcast, so just send the default MAC address.
            fetchRssiLinkSpeedAndFrequencyNative();
            WifiInfo sentWifiInfo = new WifiInfo(mWifiInfo);
            sentWifiInfo.setMacAddress(WifiInfo.DEFAULT_MAC_ADDRESS);
            intent.putExtra(WifiManager.EXTRA_WIFI_INFO, sentWifiInfo);
        }
        mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
    }

    private WifiInfo getWiFiInfoForUid(int uid) {
        if (Binder.getCallingUid() == Process.myUid()) {
            return mWifiInfo;
        }

        WifiInfo result = new WifiInfo(mWifiInfo);
        result.setMacAddress(WifiInfo.DEFAULT_MAC_ADDRESS);

        IBinder binder = mFacade.getService("package");
        IPackageManager packageManager = IPackageManager.Stub.asInterface(binder);

        try {
            if (packageManager.checkUidPermission(Manifest.permission.LOCAL_MAC_ADDRESS,
                    uid) == PackageManager.PERMISSION_GRANTED) {
                result.setMacAddress(mWifiInfo.getMacAddress());
            }
        } catch (RemoteException e) {
            Log.e(TAG, "Error checking receiver permission", e);
        }

        return result;
    }

    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.sendBroadcastAsUser(intent, UserHandle.ALL);
    }

    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.sendBroadcastAsUser(intent, UserHandle.ALL);
    }

    /**
     * Record the detailed state of a network.
     *
     * @param state the new {@code DetailedState}
     */
    private boolean setNetworkDetailedState(NetworkInfo.DetailedState state) {
        boolean hidden = false;

        if (linkDebouncing || isRoaming()) {
            // There is generally a confusion in the system about colluding
            // WiFi Layer 2 state (as reported by supplicant) and the Network state
            // which leads to multiple confusion.
            //
            // If link is de-bouncing or roaming, we already have an IP address
            // as well we were connected and are doing L2 cycles of
            // reconnecting or renewing IP address to check that we still have it
            // This L2 link flapping should ne be reflected into the Network state
            // which is the state of the WiFi Network visible to Layer 3 and applications
            // Note that once debouncing and roaming are completed, we will
            // set the Network state to where it should be, or leave it as unchanged
            //
            hidden = true;
        }
        if (DBG) {
            log("setDetailed state, old ="
                    + mNetworkInfo.getDetailedState() + " and new state=" + state
                    + " hidden=" + hidden);
        }
        if (mNetworkInfo.getExtraInfo() != null && mWifiInfo.getSSID() != null
                && !mWifiInfo.getSSID().equals(WifiSsid.NONE)) {
            // Always indicate that SSID has changed
            if (!mNetworkInfo.getExtraInfo().equals(mWifiInfo.getSSID())) {
                if (DBG) {
                    log("setDetailed state send new extra info" + mWifiInfo.getSSID());
                }
                mNetworkInfo.setExtraInfo(mWifiInfo.getSSID());
                sendNetworkStateChangeBroadcast(null);
            }
        }
        if (hidden == true) {
            return false;
        }

        if (state != mNetworkInfo.getDetailedState()) {
            mNetworkInfo.setDetailedState(state, null, mWifiInfo.getSSID());
            if (mNetworkAgent != null) {
                mNetworkAgent.sendNetworkInfo(mNetworkInfo);
            }
            sendNetworkStateChangeBroadcast(null);
            return true;
        }
        return false;
    }

    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)
        mWifiInfo.setSupplicantState(state);
        // If we receive a supplicant state change with an empty SSID,
        // this implies that wpa_supplicant is already disconnected.
        // We should pretend we are still connected when linkDebouncing is on.
        if ((stateChangeResult.wifiSsid == null
                || stateChangeResult.wifiSsid.toString().isEmpty()) && linkDebouncing) {
            return 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);
        }

        mWifiInfo.setBSSID(stateChangeResult.BSSID);

        if (mWhiteListedSsids != null
                && mWhiteListedSsids.length > 0
                && stateChangeResult.wifiSsid != null) {
            String SSID = stateChangeResult.wifiSsid.toString();
            String currentSSID = mWifiInfo.getSSID();
            if (SSID != null && currentSSID != null && !SSID.equals(WifiSsid.NONE)) {
                // Remove quote before comparing
                if (SSID.length() >= 2 && SSID.charAt(0) == '"'
                        && SSID.charAt(SSID.length() - 1) == '"') {
                    SSID = SSID.substring(1, SSID.length() - 1);
                }
                if (currentSSID.length() >= 2 && currentSSID.charAt(0) == '"'
                        && currentSSID.charAt(currentSSID.length() - 1) == '"') {
                    currentSSID = currentSSID.substring(1, currentSSID.length() - 1);
                }
                if ((!SSID.equals(currentSSID)) && (getCurrentState() == mConnectedState)) {
                    lastConnectAttemptTimestamp = System.currentTimeMillis();
                    targetWificonfiguration =
                            mWifiConfigManager.getWifiConfiguration(mWifiInfo.getNetworkId());
                    transitionTo(mRoamingState);
                }
            }
        }

        mWifiInfo.setSSID(stateChangeResult.wifiSsid);
        mWifiInfo.setEphemeral(mWifiConfigManager.isEphemeral(mWifiInfo.getNetworkId()));
        if (!mWifiInfo.getMeteredHint()) { // don't override the value if already set.
            mWifiInfo.setMeteredHint(mWifiConfigManager.getMeteredHint(mWifiInfo.getNetworkId()));
        }

        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("handleNetworkDisconnect: Stopping DHCP and clearing IP"
                + " stack:" + Thread.currentThread().getStackTrace()[2].getMethodName()
                + " - " + Thread.currentThread().getStackTrace()[3].getMethodName()
                + " - " + Thread.currentThread().getStackTrace()[4].getMethodName()
                + " - " + Thread.currentThread().getStackTrace()[5].getMethodName());

        stopRssiMonitoringOffload();

        clearCurrentConfigBSSID("handleNetworkDisconnect");

        stopIpManager();

        /* Reset data structures */
        mWifiScoreReport = null;
        mWifiInfo.reset();
        linkDebouncing = false;
        /* Reset roaming parameters */
        mAutoRoaming = false;

        setNetworkDetailedState(DetailedState.DISCONNECTED);
        if (mNetworkAgent != null) {
            mNetworkAgent.sendNetworkInfo(mNetworkInfo);
            mNetworkAgent = null;
        }
        mWifiConfigManager.updateStatus(mLastNetworkId, DetailedState.DISCONNECTED);

        /* Clear network properties */
        clearLinkProperties();

        /* Cend event to CM & network change broadcast */
        sendNetworkStateChangeBroadcast(mLastBssid);

        /* Cancel auto roam requests */
        autoRoamSetBSSID(mLastNetworkId, "any");
        mLastBssid = null;
        registerDisconnected();
        mLastNetworkId = WifiConfiguration.INVALID_NETWORK_ID;
    }

    private void handleSupplicantConnectionLoss(boolean killSupplicant) {
        /* Socket connection can be lost when we do a graceful shutdown
        * or when the driver is hung. Ensure supplicant is stopped here.
        */
        if (killSupplicant) {
            mWifiMonitor.killSupplicant(mP2pSupported);
        }
        mWifiNative.closeSupplicantConnection();
        sendSupplicantConnectionChangedBroadcast(false);
        setWifiState(WIFI_STATE_DISABLED);
    }

    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 and suspend optimizations during DHCP
        // Note: The order here is important for now. Brcm driver changes
        // power settings when we control suspend mode optimizations.
        // TODO: Remove this comment when the driver is fixed.
        setSuspendOptimizationsNative(SUSPEND_DUE_TO_DHCP, false);
        mWifiNative.setPowerSave(false);

        // Update link layer stats
        getWifiLinkLayerStats(false);

        /* P2p discovery breaks dhcp, shut it down in order to get through this */
        Message msg = new Message();
        msg.what = WifiP2pServiceImpl.BLOCK_DISCOVERY;
        msg.arg1 = WifiP2pServiceImpl.ENABLED;
        msg.arg2 = DhcpClient.CMD_PRE_DHCP_ACTION_COMPLETE;
        msg.obj = WifiStateMachine.this;
        mWifiP2pChannel.sendMessage(msg);
    }

    void handlePostDhcpSetup() {
        /* Restore power save and suspend optimizations */
        setSuspendOptimizationsNative(SUSPEND_DUE_TO_DHCP, true);
        mWifiNative.setPowerSave(true);

        mWifiP2pChannel.sendMessage(WifiP2pServiceImpl.BLOCK_DISCOVERY,
                WifiP2pServiceImpl.DISABLED);

        // Set the coexistence mode back to its default value
        mWifiNative.setBluetoothCoexistenceMode(
                mWifiNative.BLUETOOTH_COEXISTENCE_MODE_SENSE);
    }

    /**
     * Inform other components (WifiMetrics, WifiLogger, etc.) that the current connection attempt
     * has concluded.
     */
    private void reportConnectionAttemptEnd(int level2FailureCode, int connectivityFailureCode) {
        mWifiMetrics.endConnectionEvent(level2FailureCode, connectivityFailureCode);
        switch (level2FailureCode) {
            case WifiMetrics.ConnectionEvent.FAILURE_NONE:
            case WifiMetrics.ConnectionEvent.FAILURE_REDUNDANT_CONNECTION_ATTEMPT:
                // WifiLogger doesn't care about success, or pre-empted connections.
                break;
            default:
                mWifiLogger.reportConnectionFailure();
        }
    }

    private void handleIPv4Success(DhcpResults dhcpResults) {
        if (DBG) {
            logd("handleIPv4Success <" + dhcpResults.toString() + ">");
            logd("link address " + dhcpResults.ipAddress);
        }

        Inet4Address addr;
        synchronized (mDhcpResultsLock) {
            mDhcpResults = dhcpResults;
            addr = (Inet4Address) dhcpResults.ipAddress.getAddress();
        }

        if (isRoaming()) {
            int previousAddress = mWifiInfo.getIpAddress();
            int newAddress = NetworkUtils.inetAddressToInt(addr);
            if (previousAddress != newAddress) {
                logd("handleIPv4Success, roaming and address changed" +
                        mWifiInfo + " got: " + addr);
            }
        }
        mWifiInfo.setInetAddress(addr);
        if (!mWifiInfo.getMeteredHint()) { // don't override the value if already set.
            mWifiInfo.setMeteredHint(dhcpResults.hasMeteredHint());
            updateCapabilities(getCurrentWifiConfiguration());
        }
    }

    private void handleSuccessfulIpConfiguration() {
        mLastSignalLevel = -1; // Force update of signal strength
        WifiConfiguration c = getCurrentWifiConfiguration();
        if (c != null) {
            // Reset IP failure tracking
            c.getNetworkSelectionStatus().clearDisableReasonCounter(
                    WifiConfiguration.NetworkSelectionStatus.DISABLED_DHCP_FAILURE);

            // Tell the framework whether the newly connected network is trusted or untrusted.
            updateCapabilities(c);
        }
        if (c != null) {
            ScanResult result = getCurrentScanResult();
            if (result == null) {
                logd("WifiStateMachine: handleSuccessfulIpConfiguration and no scan results" +
                        c.configKey());
            } else {
                // Clear the per BSSID failure count
                result.numIpConfigFailures = 0;
                // Clear the WHOLE BSSID blacklist, which means supplicant is free to retry
                // any BSSID, even though it may already have a non zero ip failure count,
                // this will typically happen if the user walks away and come back to his arrea
                // TODO: implement blacklisting based on a timer, i.e. keep BSSID blacklisted
                // in supplicant for a couple of hours or a day
                mWifiConfigManager.clearBssidBlacklist();
            }
        }
    }

    private void handleIPv4Failure() {
        // TODO: Move this to provisioning failure, not DHCP failure.
        // DHCPv4 failure is expected on an IPv6-only network.
        mWifiLogger.captureBugReportData(WifiLogger.REPORT_REASON_DHCP_FAILURE);
        if (DBG) {
            int count = -1;
            WifiConfiguration config = getCurrentWifiConfiguration();
            if (config != null) {
                count = config.getNetworkSelectionStatus().getDisableReasonCounter(
                        WifiConfiguration.NetworkSelectionStatus.DISABLED_DHCP_FAILURE);
            }
            log("DHCP failure count=" + count);
        }
        reportConnectionAttemptEnd(
                WifiMetrics.ConnectionEvent.FAILURE_DHCP,
                WifiMetricsProto.ConnectionEvent.HLF_DHCP);
        synchronized(mDhcpResultsLock) {
             if (mDhcpResults != null) {
                 mDhcpResults.clear();
             }
        }
        if (DBG) {
            logd("handleIPv4Failure");
        }
    }

    private void handleIpConfigurationLost() {
        mWifiInfo.setInetAddress(null);
        mWifiInfo.setMeteredHint(false);

        mWifiConfigManager.updateNetworkSelectionStatus(mLastNetworkId,
                WifiConfiguration.NetworkSelectionStatus.DISABLED_DHCP_FAILURE);

        /* DHCP times out after about 30 seconds, we do a
         * disconnect thru supplicant, we will let autojoin retry connecting to the network
         */
        mWifiNative.disconnect();
    }

    // TODO: De-duplicated this and handleIpConfigurationLost().
    private void handleIpReachabilityLost() {
        mWifiInfo.setInetAddress(null);
        mWifiInfo.setMeteredHint(false);

        // TODO: Determine whether to call some form of mWifiConfigManager.handleSSIDStateChange().

        // Disconnect via supplicant, and let autojoin retry connecting to the network.
        mWifiNative.disconnect();
    }

    private int convertFrequencyToChannelNumber(int frequency) {
        if (frequency >= 2412 && frequency <= 2484) {
            return (frequency -2412) / 5 + 1;
        } else if (frequency >= 5170  &&  frequency <=5825) {
            //DFS is included
            return (frequency -5170) / 5 + 34;
        } else {
            return 0;
        }
    }

    private int chooseApChannel(int apBand) {
        int apChannel;
        int[] channel;

        if (apBand == 0)  {
            ArrayList<Integer> allowed2GChannel =
                    mWifiApConfigStore.getAllowed2GChannel();
            if (allowed2GChannel == null || allowed2GChannel.size() == 0) {
                //most safe channel to use
                if (DBG) {
                    Log.d(TAG, "No specified 2G allowed channel list");
                }
                apChannel = 6;
            } else {
                int index = mRandom.nextInt(allowed2GChannel.size());
                apChannel = allowed2GChannel.get(index).intValue();
            }
        } else {
            //5G without DFS
            channel = mWifiNative.getChannelsForBand(2);
            if (channel != null && channel.length > 0) {
                apChannel = channel[mRandom.nextInt(channel.length)];
                apChannel = convertFrequencyToChannelNumber(apChannel);
            } else {
                Log.e(TAG, "SoftAp do not get available channel list");
                apChannel = 0;
            }
        }

        if (DBG) {
            Log.d(TAG, "SoftAp set on channel " + apChannel);
        }

        return apChannel;
    }

    /* Driver/firmware setup for soft AP. */
    private boolean setupDriverForSoftAp() {
        if (!mWifiNative.loadDriver()) {
            Log.e(TAG, "Failed to load driver for softap");
            return false;
        }

        int index = mWifiNative.queryInterfaceIndex(mInterfaceName);
        if (index != -1) {
            if (!mWifiNative.setInterfaceUp(false)) {
                Log.e(TAG, "toggleInterface failed");
                return false;
            }
        } else {
            if (DBG) Log.d(TAG, "No interfaces to bring down");
        }

        try {
            mNwService.wifiFirmwareReload(mInterfaceName, "AP");
            if (DBG) Log.d(TAG, "Firmware reloaded in AP mode");
        } catch (Exception e) {
            Log.e(TAG, "Failed to reload AP firmware " + e);
        }

        if (!mWifiNative.startHal()) {
            /* starting HAL is optional */
            Log.e(TAG, "Failed to start HAL");
        }
        return true;
    }

    private byte[] macAddressFromString(String macString) {
        String[] macBytes = macString.split(":");
        if (macBytes.length != 6) {
            throw new IllegalArgumentException("MAC address should be 6 bytes long!");
        }
        byte[] mac = new byte[6];
        for (int i = 0; i < macBytes.length; i++) {
            Integer hexVal = Integer.parseInt(macBytes[i], 16);
            mac[i] = hexVal.byteValue();
        }
        return mac;
    }

    /*
     * Read a MAC address in /proc/arp/table, used by WifistateMachine
     * so as to record MAC address of default gateway.
     **/
    private String macAddressFromRoute(String ipAddress) {
        String macAddress = null;
        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new FileReader("/proc/net/arp"));

            // Skip over the line bearing colum titles
            String line = reader.readLine();

            while ((line = reader.readLine()) != null) {
                String[] tokens = line.split("[ ]+");
                if (tokens.length < 6) {
                    continue;
                }

                // ARP column format is
                // Address HWType HWAddress Flags Mask IFace
                String ip = tokens[0];
                String mac = tokens[3];

                if (ipAddress.equals(ip)) {
                    macAddress = mac;
                    break;
                }
            }

            if (macAddress == null) {
                loge("Did not find remoteAddress {" + ipAddress + "} in " +
                        "/proc/net/arp");
            }

        } catch (FileNotFoundException e) {
            loge("Could not open /proc/net/arp to lookup mac address");
        } catch (IOException e) {
            loge("Could not read /proc/net/arp to lookup mac address");
        } finally {
            try {
                if (reader != null) {
                    reader.close();
                }
            } catch (IOException e) {
                // Do nothing
            }
        }
        return macAddress;

    }

    private class WifiNetworkFactory extends NetworkFactory {
        public WifiNetworkFactory(Looper l, Context c, String TAG, NetworkCapabilities f) {
            super(l, c, TAG, f);
        }

        @Override
        protected void needNetworkFor(NetworkRequest networkRequest, int score) {
            ++mConnectionRequests;
        }

        @Override
        protected void releaseNetworkFor(NetworkRequest networkRequest) {
            --mConnectionRequests;
        }

        public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
            pw.println("mConnectionRequests " + mConnectionRequests);
        }

    }

    private class UntrustedWifiNetworkFactory extends NetworkFactory {
        private int mUntrustedReqCount;

        public UntrustedWifiNetworkFactory(Looper l, Context c, String tag, NetworkCapabilities f) {
            super(l, c, tag, f);
        }

        @Override
        protected void needNetworkFor(NetworkRequest networkRequest, int score) {
            if (!networkRequest.networkCapabilities.hasCapability(
                    NetworkCapabilities.NET_CAPABILITY_TRUSTED)) {
                if (++mUntrustedReqCount == 1) {
                    if (mWifiConnectivityManager != null) {
                        mWifiConnectivityManager.setUntrustedConnectionAllowed(true);
                    }
                }
            }
        }

        @Override
        protected void releaseNetworkFor(NetworkRequest networkRequest) {
            if (!networkRequest.networkCapabilities.hasCapability(
                    NetworkCapabilities.NET_CAPABILITY_TRUSTED)) {
                if (--mUntrustedReqCount == 0) {
                    if (mWifiConnectivityManager != null) {
                        mWifiConnectivityManager.setUntrustedConnectionAllowed(false);
                    }
                }
            }
        }

        public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
            pw.println("mUntrustedReqCount " + mUntrustedReqCount);
        }
    }

    void maybeRegisterNetworkFactory() {
        if (mNetworkFactory == null) {
            checkAndSetConnectivityInstance();
            if (mCm != null) {
                mNetworkFactory = new WifiNetworkFactory(getHandler().getLooper(), mContext,
                        NETWORKTYPE, mNetworkCapabilitiesFilter);
                mNetworkFactory.setScoreFilter(60);
                mNetworkFactory.register();

                // We can't filter untrusted network in the capabilities filter because a trusted
                // network would still satisfy a request that accepts untrusted ones.
                mUntrustedNetworkFactory = new UntrustedWifiNetworkFactory(getHandler().getLooper(),
                        mContext, NETWORKTYPE_UNTRUSTED, mNetworkCapabilitiesFilter);
                mUntrustedNetworkFactory.setScoreFilter(Integer.MAX_VALUE);
                mUntrustedNetworkFactory.register();
            }
        }
    }

    /********************************************************
     * HSM states
     *******************************************************/

    class DefaultState extends State {
        @Override
        public boolean processMessage(Message message) {
            logStateAndMessage(message, this);

            switch (message.what) {
                case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: {
                    AsyncChannel ac = (AsyncChannel) message.obj;
                    if (ac == mWifiP2pChannel) {
                        if (message.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
                            mWifiP2pChannel.sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION);
                        } else {
                            loge("WifiP2pService connection failure, error=" + message.arg1);
                        }
                    } else {
                        loge("got HALF_CONNECTED for unknown channel");
                    }
                    break;
                }
                case AsyncChannel.CMD_CHANNEL_DISCONNECTED: {
                    AsyncChannel ac = (AsyncChannel) message.obj;
                    if (ac == mWifiP2pChannel) {
                        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_CAPABILITY_FREQ:
                    replyToMessage(message, message.what, null);
                    break;
                case CMD_GET_CONFIGURED_NETWORKS:
                    replyToMessage(message, message.what, (List<WifiConfiguration>) null);
                    break;
                case CMD_GET_PRIVILEGED_CONFIGURED_NETWORKS:
                    replyToMessage(message, message.what, (List<WifiConfiguration>) null);
                    break;
                case CMD_ENABLE_RSSI_POLL:
                    mEnableRssiPolling = (message.arg1 == 1);
                    break;
                case CMD_SET_HIGH_PERF_MODE:
                    if (message.arg1 == 1) {
                        setSuspendOptimizations(SUSPEND_DUE_TO_HIGH_PERF, false);
                    } else {
                        setSuspendOptimizations(SUSPEND_DUE_TO_HIGH_PERF, true);
                    }
                    break;
                case CMD_BOOT_COMPLETED:
                    maybeRegisterNetworkFactory();
                    break;
                case CMD_SCREEN_STATE_CHANGED:
                    handleScreenStateChanged(message.arg1 != 0);
                    break;
                    /* Discard */
                case CMD_START_SCAN:
                    messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD;
                    break;
                case CMD_START_SUPPLICANT:
                case CMD_STOP_SUPPLICANT:
                case CMD_STOP_SUPPLICANT_FAILED:
                case CMD_START_DRIVER:
                case CMD_STOP_DRIVER:
                case CMD_DRIVER_START_TIMED_OUT:
                case CMD_START_AP:
                case CMD_START_AP_FAILURE:
                case CMD_STOP_AP:
                case CMD_AP_STOPPED:
                case CMD_DISCONNECT:
                case CMD_RECONNECT:
                case CMD_REASSOCIATE:
                case CMD_RELOAD_TLS_AND_RECONNECT:
                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.SCAN_FAILED_EVENT:
                case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT:
                case WifiMonitor.AUTHENTICATION_FAILURE_EVENT:
                case WifiMonitor.ASSOCIATION_REJECTION_EVENT:
                case WifiMonitor.WPS_OVERLAP_EVENT:
                case CMD_BLACKLIST_NETWORK:
                case CMD_CLEAR_BLACKLIST:
                case CMD_SET_OPERATIONAL_MODE:
                case CMD_SET_FREQUENCY_BAND:
                case CMD_RSSI_POLL:
                case CMD_ENABLE_ALL_NETWORKS:
                case DhcpClient.CMD_PRE_DHCP_ACTION:
                case DhcpClient.CMD_PRE_DHCP_ACTION_COMPLETE:
                case DhcpClient.CMD_POST_DHCP_ACTION:
                case CMD_NO_NETWORKS_PERIODIC_SCAN:
                case CMD_DISABLE_P2P_RSP:
                case WifiMonitor.SUP_REQUEST_IDENTITY:
                case CMD_TEST_NETWORK_DISCONNECT:
                case CMD_OBTAINING_IP_ADDRESS_WATCHDOG_TIMER:
                case WifiMonitor.SUP_REQUEST_SIM_AUTH:
                case CMD_TARGET_BSSID:
                case CMD_AUTO_CONNECT:
                case CMD_AUTO_ROAM:
                case CMD_AUTO_SAVE_NETWORK:
                case CMD_ASSOCIATED_BSSID:
                case CMD_UNWANTED_NETWORK:
                case CMD_DISCONNECTING_WATCHDOG_TIMER:
                case CMD_ROAM_WATCHDOG_TIMER:
                case CMD_DISABLE_EPHEMERAL_NETWORK:
                case CMD_UPDATE_ASSOCIATED_SCAN_PERMISSION:
                    messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD;
                    break;
                case CMD_SET_SUSPEND_OPT_ENABLED:
                    if (message.arg1 == 1) {
                        if (message.arg2 == 1) {
                            mSuspendWakeLock.release();
                        }
                        setSuspendOptimizations(SUSPEND_DUE_TO_SCREEN, true);
                    } else {
                        setSuspendOptimizations(SUSPEND_DUE_TO_SCREEN, false);
                    }
                    break;
                case WifiMonitor.DRIVER_HUNG_EVENT:
                    setSupplicantRunning(false);
                    setSupplicantRunning(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:
                    messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL;
                    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 WifiManager.RSSI_PKTCNT_FETCH:
                    replyToMessage(message, WifiManager.RSSI_PKTCNT_FETCH_FAILED,
                            WifiManager.BUSY);
                    break;
                case CMD_GET_SUPPORTED_FEATURES:
                    int featureSet = mWifiNative.getSupportedFeatureSet();
                    replyToMessage(message, message.what, featureSet);
                    break;
                case CMD_FIRMWARE_ALERT:
                    if (mWifiLogger != null) {
                        byte[] buffer = (byte[])message.obj;
                        mWifiLogger.captureAlertData(message.arg1, buffer);
                    }
                    break;
                case CMD_GET_LINK_LAYER_STATS:
                    // Not supported hence reply with error message
                    replyToMessage(message, message.what, null);
                    break;
                case WifiP2pServiceImpl.P2P_CONNECTION_CHANGED:
                    NetworkInfo info = (NetworkInfo) message.obj;
                    mP2pConnected.set(info.isConnected());
                    break;
                case WifiP2pServiceImpl.DISCONNECT_WIFI_REQUEST:
                    mTemporarilyDisconnectWifi = (message.arg1 == 1);
                    replyToMessage(message, WifiP2pServiceImpl.DISCONNECT_WIFI_RESPONSE);
                    break;
                /* Link configuration (IP address, DNS, ...) changes notified via netlink */
                case CMD_UPDATE_LINKPROPERTIES:
                    updateLinkProperties((LinkProperties) message.obj);
                    break;
                case CMD_GET_MATCHING_CONFIG:
                    replyToMessage(message, message.what);
                    break;
                case CMD_IP_CONFIGURATION_SUCCESSFUL:
                case CMD_IP_CONFIGURATION_LOST:
                case CMD_IP_REACHABILITY_LOST:
                    messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD;
                    break;
                case CMD_GET_CONNECTION_STATISTICS:
                    replyToMessage(message, message.what, mWifiConnectionStatistics);
                    break;
                case CMD_REMOVE_APP_CONFIGURATIONS:
                    deferMessage(message);
                    break;
                case CMD_REMOVE_USER_CONFIGURATIONS:
                    deferMessage(message);
                    break;
                case CMD_START_IP_PACKET_OFFLOAD:
                    if (mNetworkAgent != null) mNetworkAgent.onPacketKeepaliveEvent(
                            message.arg1,
                            ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK);
                    break;
                case CMD_STOP_IP_PACKET_OFFLOAD:
                    if (mNetworkAgent != null) mNetworkAgent.onPacketKeepaliveEvent(
                            message.arg1,
                            ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK);
                    break;
                case CMD_START_RSSI_MONITORING_OFFLOAD: