/* * 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; /** * TODO: * Deprecate WIFI_STATE_UNKNOWN */ import static android.net.wifi.WifiManager.WIFI_STATE_UNKNOWN; import android.app.ActivityManager; import android.app.AlarmManager; import android.app.PendingIntent; import android.app.backup.IBackupManager; import android.bluetooth.BluetoothAdapter; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.PackageManager; import android.database.ContentObserver; import android.net.ConnectivityManager; import android.net.DhcpResults; import android.net.DhcpStateMachine; import android.net.InterfaceConfiguration; import android.net.LinkAddress; import android.net.LinkProperties; import android.net.NetworkAgent; import android.net.NetworkCapabilities; import android.net.NetworkFactory; import android.net.NetworkInfo; import android.net.NetworkInfo.DetailedState; import android.net.NetworkRequest; import android.net.NetworkUtils; import android.net.RouteInfo; import android.net.StaticIpConfiguration; import android.net.TrafficStats; import android.net.wifi.BatchedScanResult; import android.net.wifi.BatchedScanSettings; 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.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.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.ServiceManager; import android.os.SystemClock; import android.os.SystemProperties; import android.os.UserHandle; import android.os.WorkSource; import android.provider.Settings; import android.telephony.TelephonyManager; import android.text.TextUtils; import android.util.Log; import android.util.LruCache; import com.android.internal.R; import com.android.internal.app.IBatteryStats; import com.android.internal.util.AsyncChannel; import com.android.internal.util.Protocol; import com.android.internal.util.State; import com.android.internal.util.StateMachine; import com.android.server.net.NetlinkTracker; import com.android.server.wifi.p2p.WifiP2pServiceImpl; 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.HashSet; import java.util.LinkedList; import java.util.List; import java.util.Locale; import java.util.Queue; import java.util.concurrent.atomic.AtomicBoolean; import java.util.concurrent.atomic.AtomicInteger; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Track the state of Wifi connectivity. All event handling is done here, * and all changes in connectivity state are initiated here. * * Wi-Fi now supports three modes of operation: Client, 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 { private static final String NETWORKTYPE = "WIFI"; private static final String NETWORKTYPE_UNTRUSTED = "WIFI_UT"; private static boolean DBG = false; private static boolean VDBG = false; private static boolean VVDBG = false; private static boolean mLogMessages = false; private static final int ONE_HOUR_MILLI = 1000 * 60 * 60; private static final String GOOGLE_OUI = "DA-A1-19"; /* temporary debug flag - best network selection development */ private static boolean PDBG = false; /* 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 log(String s) {; Log.e(getName(), s); } private WifiMonitor mWifiMonitor; private WifiNative mWifiNative; private WifiConfigStore mWifiConfigStore; private WifiAutoJoinController mWifiAutoJoinController; private INetworkManagementService mNwService; private ConnectivityManager mCm; private final boolean mP2pSupported; private final AtomicBoolean mP2pConnected = new AtomicBoolean(false); private boolean mTemporarilyDisconnectWifi = false; private final String mPrimaryDeviceType; /* Scan results handling */ private List mScanResults = new ArrayList(); private static final Pattern scanResultPattern = Pattern.compile("\t+"); private static final int SCAN_RESULT_CACHE_SIZE = 160; private final LruCache mScanResultCache; // 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; /* Batch scan results */ private final List mBatchedScanResults = new ArrayList(); private int mBatchedScanOwnerUid = UNKNOWN_SCAN_SOURCE; private int mExpectedBatchedScans = 0; private long mBatchedScanMinPollTime = 0; private boolean mScreenOn = false; /* Chipset supports background scan */ private final boolean mBackgroundScanSupported; private 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; // Testing various network disconnect cases by sending lots of spurious // disconnect to supplicant private boolean testNetworkDisconnect = false; private boolean mEnableRssiPolling = false; private boolean mEnableBackgroundScan = 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 mBufferedScanMsg = new LinkedList(); private WorkSource mScanWorkSource = null; private static final int UNKNOWN_SCAN_SOURCE = -1; private static final int SCAN_ALARM_SOURCE = -2; 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"; private static final String BATCHED_SETTING = "batched_settings"; private static final String BATCHED_WORKSOURCE = "batched_worksource"; /* 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 = 7000; /** * 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; /** * 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; private WifiInfo mWifiInfo; private NetworkInfo mNetworkInfo; private NetworkCapabilities mNetworkCapabilities; private SupplicantStateTracker mSupplicantStateTracker; private DhcpStateMachine mDhcpStateMachine; private boolean mDhcpActive = false; private int mWifiLinkLayerStatsSupported = 4; // Temporary disable private final AtomicInteger mCountryCodeSequence = new AtomicInteger(); // Whether the state machine goes thru the Disconnecting->Disconnected->ObtainingIpAddress private int mAutoRoaming = WifiAutoJoinController.AUTO_JOIN_IDLE; // 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"; 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; boolean isRoaming() { return mAutoRoaming == WifiAutoJoinController.AUTO_JOIN_ROAMING || mAutoRoaming == WifiAutoJoinController.AUTO_JOIN_EXTENDED_ROAMING; } public void autoRoamSetBSSID(int netId, String bssid) { autoRoamSetBSSID(mWifiConfigStore.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 == mTargetRoamBSSID && bssid == config.BSSID) { return false; // We didnt change anything } if (!mTargetRoamBSSID.equals("any") && bssid.equals("any")) { // Changing to ANY if (!mWifiConfigStore.roamOnAny) { ret = false; // Nothing to do } } if (VDBG) { loge("autoRoamSetBSSID " + bssid + " key=" + config.configKey()); } config.autoJoinBSSID = bssid; mTargetRoamBSSID = bssid; mWifiConfigStore.saveWifiConfigBSSID(config); return ret; } /** * Subset of link properties coming from netlink. * Currently includes IPv4 and IPv6 addresses. In the future will also include IPv6 DNS servers * and domains obtained from router advertisements (RFC 6106). */ private NetlinkTracker mNetlinkTracker; private AlarmManager mAlarmManager; private PendingIntent mScanIntent; private PendingIntent mDriverStopIntent; private PendingIntent mBatchedScanIntervalIntent; /* Tracks current frequency mode */ private AtomicInteger mFrequencyBand = new AtomicInteger(WifiManager.WIFI_FREQUENCY_BAND_AUTO); /* Tracks if we are filtering Multicast v4 packets. Default is to filter. */ private AtomicBoolean mFilteringMulticastV4Packets = new AtomicBoolean(true); // Channel for sending replies. private AsyncChannel mReplyChannel = new AsyncChannel(); private WifiP2pServiceImpl mWifiP2pServiceImpl; // Used to initiate a connection with WifiP2pService private AsyncChannel mWifiP2pChannel; private AsyncChannel mWifiApConfigChannel; private int mConnectionRequests = 0; private WifiNetworkFactory mNetworkFactory; private UntrustedWifiNetworkFactory mUntrustedNetworkFactory; private WifiNetworkAgent mNetworkAgent; // 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(); /* 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; /* Delayed stop to avoid shutting down driver too quick*/ static final int CMD_DELAYED_STOP_DRIVER = BASE + 18; /* A delayed message sent to start driver when it fail to come up */ static final int CMD_DRIVER_START_TIMED_OUT = BASE + 19; /* Start the soft access point */ static final int CMD_START_AP = BASE + 21; /* Indicates soft ap start succeeded */ static final int CMD_START_AP_SUCCESS = BASE + 22; /* Indicates soft ap start failed */ static final int CMD_START_AP_FAILURE = BASE + 23; /* Stop the soft access point */ static final int CMD_STOP_AP = BASE + 24; /* Set the soft access point configuration */ static final int CMD_SET_AP_CONFIG = BASE + 25; /* Soft access point configuration set completed */ static final int CMD_SET_AP_CONFIG_COMPLETED = BASE + 26; /* Request the soft access point configuration */ static final int CMD_REQUEST_AP_CONFIG = BASE + 27; /* Response to access point configuration request */ static final int CMD_RESPONSE_AP_CONFIG = BASE + 28; /* Invoked when getting a tether state change notification */ static final int CMD_TETHER_STATE_CHANGE = BASE + 29; /* A delayed message sent to indicate tether state change failed to arrive */ static final int CMD_TETHER_NOTIFICATION_TIMED_OUT = BASE + 30; static final int CMD_BLUETOOTH_ADAPTER_STATE_CHANGE = BASE + 31; /* Supplicant commands */ /* Is supplicant alive ? */ static final int CMD_PING_SUPPLICANT = BASE + 51; /* Add/update a network configuration */ static final int CMD_ADD_OR_UPDATE_NETWORK = BASE + 52; /* Delete a network */ static final int CMD_REMOVE_NETWORK = BASE + 53; /* Enable a network. The device will attempt a connection to the given network. */ static final int CMD_ENABLE_NETWORK = BASE + 54; /* Enable all networks */ static final int CMD_ENABLE_ALL_NETWORKS = BASE + 55; /* Blacklist network. De-prioritizes the given BSSID for connection. */ static final int CMD_BLACKLIST_NETWORK = BASE + 56; /* Clear the blacklist network list */ static final int CMD_CLEAR_BLACKLIST = BASE + 57; /* Save configuration */ static final int CMD_SAVE_CONFIG = BASE + 58; /* Get configured networks */ static final int CMD_GET_CONFIGURED_NETWORKS = BASE + 59; /* 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; /* Set the country code */ static final int CMD_SET_COUNTRY_CODE = BASE + 80; /* Enables RSSI poll */ static final int CMD_ENABLE_RSSI_POLL = BASE + 82; /* RSSI poll */ static final int CMD_RSSI_POLL = BASE + 83; /* Set up packet filtering */ static final int CMD_START_PACKET_FILTERING = BASE + 84; /* Clear packet filter */ static final int CMD_STOP_PACKET_FILTERING = BASE + 85; /* 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; /* arg1 values to CMD_STOP_PACKET_FILTERING and CMD_START_PACKET_FILTERING */ static final int MULTICAST_V6 = 1; static final int MULTICAST_V4 = 0; /* Set the frequency band */ static final int CMD_SET_FREQUENCY_BAND = BASE + 90; /* Enable 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; /** * 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; /** * Watchdog for protecting against b/16823537 * Leave time for 4-ways 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; int disconnectingWatchdogCount = 0; static final int DISCONNECTING_GUARD_TIMER_MSEC = 5000; /* Disconnecting state watchdog */ static final int CMD_DISCONNECTING_WATCHDOG_TIMER = BASE + 96; /* Disable an ephemeral network */ static final int CMD_DISABLE_EPHEMERAL_NETWORK = BASE + 98; /* 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; /* change the batch scan settings. * arg1 = responsible UID * arg2 = csph (channel scans per hour) * obj = bundle with the new settings and the optional worksource */ public static final int CMD_SET_BATCHED_SCAN = BASE + 135; public static final int CMD_START_NEXT_BATCHED_SCAN = BASE + 136; public static final int CMD_POLL_BATCHED_SCAN = BASE + 137; /* 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; static final int network_status_unwanted_disconnect = 0; static final int network_status_unwanted_disable_autojoin = 1; 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; /* 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; private int mDisconnectedScanPeriodMs = 10000; /** * 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; /** * timeStamp of last full band scan we perfoemed for autojoin while connected with screen lit */ private long lastFullBandConnectedTimeMilli; /** * time interval to the next full band scan we will perform for * autojoin while connected with screen lit */ private long fullBandConnectedTimeIntervalMilli; /** * max time interval to the next full band scan we will perform for * autojoin while connected with screen lit * Max time is 5 minutes */ private static final long maxFullBandConnectedTimeIntervalMilli = 1000 * 60 * 5; /** * 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; /** * Starting and shutting down driver too quick causes problems leading to driver * being in a bad state. Delay driver stop. */ private final int mDriverStopDelayMs; private int mDelayedStopCounter; private boolean mInDelayedStop = false; // sometimes telephony gives us this data before boot is complete and we can't store it // until after, so the write is deferred private volatile String mPersistedCountryCode; // Supplicant doesn't like setting the same country code multiple times (it may drop // currently connected network), so we save the country code here to avoid redundency private String mLastSetCountryCode; /* 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(); /* Waiting for link quality verification to be complete */ private State mVerifyingLinkState = new VerifyingLinkState(); /* 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 is starting up */ private State mSoftApStartingState = new SoftApStartingState(); /* Soft ap is running */ private State mSoftApStartedState = new SoftApStartedState(); /* Soft ap is running and we are waiting for tether notification */ private State mTetheringState = new TetheringState(); /* Soft ap is running and we are tethered through connectivity service */ private State mTetheredState = new TetheredState(); /* Waiting for untether confirmation before stopping soft Ap */ private State mUntetheringState = new UntetheringState(); private class TetherStateChange { ArrayList available; ArrayList active; TetherStateChange(ArrayList av, ArrayList ac) { available = av; active = ac; } } public static class SimAuthRequestData { int networkId; int protocol; String ssid; String[] challenges; } public static class SimAuthResponseData { int id; String Kc1; String SRES1; String Kc2; String SRES2; String Kc3; String SRES3; } /** * 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; private static final String ACTION_START_SCAN = "com.android.server.WifiManager.action.START_SCAN"; private static final String DELAYED_STOP_COUNTER = "DelayedStopCounter"; private static final int DRIVER_STOP_REQUEST = 0; private static final String ACTION_DELAYED_DRIVER_STOP = "com.android.server.WifiManager.action.DELAYED_DRIVER_STOP"; private static final String ACTION_REFRESH_BATCHED_SCAN = "com.android.server.WifiManager.action.REFRESH_BATCHED_SCAN"; /** * 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 BatchedScanSettings mBatchedScanSettings = null; /** * Track the worksource/cost of the current settings and track what's been noted * to the battery stats, so we can mark the end of the previous when changing. */ private WorkSource mBatchedScanWorkSource = null; private int mBatchedScanCsph = 0; private WorkSource mNotedBatchedScanWorkSource = null; private int mNotedBatchedScanCsph = 0; private String mTcpBufferSizes = null; // Used for debug and stats gathering private static int sScanAlarmIntentCount = 0; final static int frameworkMinScanIntervalSaneValue = 10000; public WifiStateMachine(Context context, String wlanInterface, WifiTrafficPoller trafficPoller){ super("WifiStateMachine"); mContext = context; mInterfaceName = wlanInterface; mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_WIFI, 0, NETWORKTYPE, ""); mBatteryStats = IBatteryStats.Stub.asInterface(ServiceManager.getService( BatteryStats.SERVICE_NAME)); IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE); mNwService = INetworkManagementService.Stub.asInterface(b); mP2pSupported = mContext.getPackageManager().hasSystemFeature( PackageManager.FEATURE_WIFI_DIRECT); mWifiNative = new WifiNative(mInterfaceName); mWifiConfigStore = new WifiConfigStore(context, mWifiNative); mWifiAutoJoinController = new WifiAutoJoinController(context, this, mWifiConfigStore, mWifiConnectionStatistics, mWifiNative); mWifiMonitor = new WifiMonitor(this, mWifiNative); mWifiInfo = new WifiInfo(); mSupplicantStateTracker = new SupplicantStateTracker(context, this, mWifiConfigStore, getHandler()); mLinkProperties = new LinkProperties(); IBinder s1 = ServiceManager.getService(Context.WIFI_P2P_SERVICE); mWifiP2pServiceImpl = (WifiP2pServiceImpl)IWifiP2pManager.Stub.asInterface(s1); mNetworkInfo.setIsAvailable(false); mLastBssid = null; mLastNetworkId = WifiConfiguration.INVALID_NETWORK_ID; mLastSignalLevel = -1; mNetlinkTracker = new NetlinkTracker(mInterfaceName, new NetlinkTracker.Callback() { public void update() { sendMessage(CMD_UPDATE_LINKPROPERTIES); } }); try { mNwService.registerObserver(mNetlinkTracker); } catch (RemoteException e) { loge("Couldn't register netlink tracker: " + e.toString()); } mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE); mScanIntent = getPrivateBroadcast(ACTION_START_SCAN, SCAN_REQUEST); mBatchedScanIntervalIntent = getPrivateBroadcast(ACTION_REFRESH_BATCHED_SCAN, 0); // 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 < frameworkMinScanIntervalSaneValue) { period = frameworkMinScanIntervalSaneValue; } mDefaultFrameworkScanIntervalMs = period; mDriverStopDelayMs = mContext.getResources().getInteger( R.integer.config_wifi_driver_stop_delay); mBackgroundScanSupported = mContext.getResources().getBoolean( R.bool.config_wifi_background_scan_support); mPrimaryDeviceType = mContext.getResources().getString( R.string.config_wifi_p2p_device_type); mUserWantsSuspendOpt.set(Settings.Global.getInt(mContext.getContentResolver(), 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_RESTRICTED); mNetworkCapabilitiesFilter.setLinkUpstreamBandwidthKbps(1024 * 1024); mNetworkCapabilitiesFilter.setLinkDownstreamBandwidthKbps(1024 * 1024); // TODO - needs to be a bit more dynamic mNetworkCapabilities = new NetworkCapabilities(mNetworkCapabilitiesFilter); mContext.registerReceiver( new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { ArrayList available = intent.getStringArrayListExtra( ConnectivityManager.EXTRA_AVAILABLE_TETHER); ArrayList active = intent.getStringArrayListExtra( ConnectivityManager.EXTRA_ACTIVE_TETHER); sendMessage(CMD_TETHER_STATE_CHANGE, new TetherStateChange(available, active)); } },new IntentFilter(ConnectivityManager.ACTION_TETHER_STATE_CHANGED)); mContext.registerReceiver( new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { sScanAlarmIntentCount++; // Used for debug only startScan(SCAN_ALARM_SOURCE, mDelayedScanCounter.incrementAndGet(), null, null); if (VDBG) loge("WiFiStateMachine SCAN ALARM -> " + mDelayedScanCounter.get()); } }, new IntentFilter(ACTION_START_SCAN)); IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_SCREEN_OFF); filter.addAction(ACTION_REFRESH_BATCHED_SCAN); 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); } else if (action.equals(ACTION_REFRESH_BATCHED_SCAN)) { startNextBatchedScanAsync(); } } }, filter); mContext.registerReceiver( new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { int counter = intent.getIntExtra(DELAYED_STOP_COUNTER, 0); sendMessage(CMD_DELAYED_STOP_DRIVER, counter, 0); } }, new IntentFilter(ACTION_DELAYED_DRIVER_STOP)); mContext.getContentResolver().registerContentObserver(Settings.Global.getUriFor( Settings.Global.WIFI_SUSPEND_OPTIMIZATIONS_ENABLED), false, new ContentObserver(getHandler()) { @Override public void onChange(boolean selfChange) { mUserWantsSuspendOpt.set(Settings.Global.getInt(mContext.getContentResolver(), 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)); mScanResultCache = new LruCache(SCAN_RESULT_CACHE_SIZE); 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); 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(mVerifyingLinkState, 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(mSoftApStartingState, mDefaultState); addState(mSoftApStartedState, mDefaultState); addState(mTetheringState, mSoftApStartedState); addState(mTetheredState, mSoftApStartedState); addState(mUntetheringState, mSoftApStartedState); setInitialState(mInitialState); setLogRecSize(ActivityManager.isLowRamDeviceStatic() ? 100 : 3000); setLogOnlyTransitions(false); if (VDBG) setDbg(true); //start the state machine start(); 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); } PendingIntent getPrivateBroadcast(String action, int requestCode) { Intent intent = new Intent(action, null); intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); intent.setPackage(this.getClass().getPackage().getName()); return PendingIntent.getBroadcast(mContext, requestCode, intent, 0); } private int mVerboseLoggingLevel = 0; int getVerboseLoggingLevel() { return mVerboseLoggingLevel; } void enableVerboseLogging(int verbose) { mVerboseLoggingLevel = verbose; if (verbose > 0) { DBG = true; VDBG = true; PDBG = true; mLogMessages = true; mWifiNative.setSupplicantLogLevel("DEBUG"); } else { DBG = false; VDBG = false; PDBG = false; mLogMessages = false; mWifiNative.setSupplicantLogLevel("INFO"); } mWifiAutoJoinController.enableVerboseLogging(verbose); mWifiMonitor.enableVerboseLogging(verbose); mWifiNative.enableVerboseLogging(verbose); mWifiConfigStore.enableVerboseLogging(verbose); mSupplicantStateTracker.enableVerboseLogging(verbose); } private int mAggressiveHandover = 0; int getAggressiveHandover() { return mAggressiveHandover; } void enableAggressiveHandover(int enabled) { mAggressiveHandover = enabled; } public void setAllowScansWithTraffic(int enabled) { mWifiConfigStore.alwaysEnableScansWhileAssociated = enabled; } public int getAllowScansWithTraffic() { return mWifiConfigStore.alwaysEnableScansWhileAssociated; } /* * * Framework scan control */ private boolean mAlarmEnabled = false; /* This is set from the overlay config file or from a secure setting. * A value of 0 disables scanning in the framework. */ private long mFrameworkScanIntervalMs = 10000; private AtomicInteger mDelayedScanCounter = new AtomicInteger(); private void setScanAlarm(boolean enabled) { if (PDBG) { loge("setScanAlarm " + enabled + " period " + mDefaultFrameworkScanIntervalMs + " mBackgroundScanSupported " + mBackgroundScanSupported); } if (mBackgroundScanSupported == false) { // Scan alarm is only used for background scans if they are not // offloaded to the wifi chipset, hence enable the scan alarm // gicing us RTC_WAKEUP of backgroundScan is NOT supported enabled = true; } if (enabled == mAlarmEnabled) return; if (enabled) { /* Set RTC_WAKEUP alarms if PNO is not supported - because no one is */ /* going to wake up the host processor to look for access points */ mAlarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + mDefaultFrameworkScanIntervalMs, mScanIntent); mAlarmEnabled = true; } else { mAlarmManager.cancel(mScanIntent); mAlarmEnabled = false; } } private void cancelDelayedScan() { mDelayedScanCounter.incrementAndGet(); loge("cancelDelayedScan -> " + mDelayedScanCounter); } private boolean checkAndRestartDelayedScan(int counter, boolean restart, int milli, ScanSettings settings, WorkSource workSource) { if (counter != mDelayedScanCounter.get()) { return false; } if (restart) startDelayedScan(milli, settings, workSource); return true; } private void startDelayedScan(int milli, ScanSettings settings, WorkSource workSource) { if (milli <= 0) return; /** * The cases where the scan alarm should be run are : * - DisconnectedState && screenOn => used delayed timer * - DisconnectedState && !screenOn && mBackgroundScanSupported => PNO * - DisconnectedState && !screenOn && !mBackgroundScanSupported => used RTC_WAKEUP Alarm * - ConnectedState && screenOn => used delayed timer */ mDelayedScanCounter.incrementAndGet(); if (mScreenOn && (getCurrentState() == mDisconnectedState || getCurrentState() == mConnectedState)) { Bundle bundle = new Bundle(); bundle.putParcelable(CUSTOMIZED_SCAN_SETTING, settings); bundle.putParcelable(CUSTOMIZED_SCAN_WORKSOURCE, workSource); bundle.putLong(SCAN_REQUEST_TIME, System.currentTimeMillis()); sendMessageDelayed(CMD_START_SCAN, SCAN_ALARM_SOURCE, mDelayedScanCounter.get(), bundle, milli); if (DBG) loge("startDelayedScan send -> " + mDelayedScanCounter + " milli " + milli); } else if (mBackgroundScanSupported == false && !mScreenOn && getCurrentState() == mDisconnectedState) { setScanAlarm(true); if (DBG) loge("startDelayedScan start scan alarm -> " + mDelayedScanCounter + " milli " + milli); } else { if (DBG) loge("startDelayedScan unhandled -> " + mDelayedScanCounter + " milli " + milli); } } private boolean setRandomMacOui() { String oui = mContext.getResources().getString( R.string.config_wifi_random_mac_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()); } public WifiMonitor getWifiMonitor() { return mWifiMonitor; } /** * TODO: doc */ public boolean syncPingSupplicant(AsyncChannel channel) { Message resultMsg = channel.sendMessageSynchronously(CMD_PING_SUPPLICANT); boolean result = (resultMsg.arg1 != FAILURE); resultMsg.recycle(); return result; } public List syncGetChannelList(AsyncChannel channel) { Message resultMsg = channel.sendMessageSynchronously(CMD_GET_CAPABILITY_FREQ); List list = null; if (resultMsg.obj != null) { list = new ArrayList(); String freqs = (String) resultMsg.obj; String[] lines = freqs.split("\n"); for (String line : lines) if (line.contains("MHz")) { // line format: " 52 = 5260 MHz (NO_IBSS) (DFS)" WifiChannel c = new WifiChannel(); String[] prop = line.split(" "); if (prop.length < 5) continue; try { c.channelNum = Integer.parseInt(prop[1]); c.freqMHz = Integer.parseInt(prop[3]); } catch (NumberFormatException e) { } c.isDFS = line.contains("(DFS)"); list.add(c); } else if (line.contains("Mode[B] Channels:")) { // B channels are the same as G channels, skipped break; } } resultMsg.recycle(); return (list != null && list.size() > 0) ? list : null; } /** * When settings allowing making use of untrusted networks change, trigger a scan * so as to kick of autojoin. */ public void startScanForUntrustedSettingChange() { startScan(SET_ALLOW_UNTRUSTED_SOURCE, 0, null, null); } /** * 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); } /** * start or stop batched scanning using the given settings */ public void setBatchedScanSettings(BatchedScanSettings settings, int callingUid, int csph, WorkSource workSource) { Bundle bundle = new Bundle(); bundle.putParcelable(BATCHED_SETTING, settings); bundle.putParcelable(BATCHED_WORKSOURCE, workSource); sendMessage(CMD_SET_BATCHED_SCAN, callingUid, csph, bundle); } public List syncGetBatchedScanResultsList() { synchronized (mBatchedScanResults) { List batchedScanList = new ArrayList(mBatchedScanResults.size()); for(BatchedScanResult result: mBatchedScanResults) { batchedScanList.add(new BatchedScanResult(result)); } return batchedScanList; } } public void requestBatchedScanPoll() { sendMessage(CMD_POLL_BATCHED_SCAN); } private void startBatchedScan() { if (mBatchedScanSettings == null) return; if (mDhcpActive) { if (DBG) log("not starting Batched Scans due to DHCP"); return; } // first grab any existing data retrieveBatchedScanData(); if (PDBG) loge("try starting Batched Scans due to DHCP"); mAlarmManager.cancel(mBatchedScanIntervalIntent); String scansExpected = mWifiNative.setBatchedScanSettings(mBatchedScanSettings); try { mExpectedBatchedScans = Integer.parseInt(scansExpected); setNextBatchedAlarm(mExpectedBatchedScans); if (mExpectedBatchedScans > 0) noteBatchedScanStart(); } catch (NumberFormatException e) { stopBatchedScan(); loge("Exception parsing WifiNative.setBatchedScanSettings response " + e); } } // called from BroadcastListener private void startNextBatchedScanAsync() { sendMessage(CMD_START_NEXT_BATCHED_SCAN); } private void startNextBatchedScan() { // first grab any existing data retrieveBatchedScanData(); setNextBatchedAlarm(mExpectedBatchedScans); } private void handleBatchedScanPollRequest() { if (DBG) { log("handleBatchedScanPoll Request - mBatchedScanMinPollTime=" + mBatchedScanMinPollTime + " , mBatchedScanSettings=" + mBatchedScanSettings); } // if there is no appropriate PollTime that's because we either aren't // batching or we've already set a time for a poll request if (mBatchedScanMinPollTime == 0) return; if (mBatchedScanSettings == null) return; long now = System.currentTimeMillis(); if (now > mBatchedScanMinPollTime) { // do the poll and reset our timers startNextBatchedScan(); } else { mAlarmManager.setExact(AlarmManager.RTC_WAKEUP, mBatchedScanMinPollTime, mBatchedScanIntervalIntent); mBatchedScanMinPollTime = 0; } } // return true if new/different private boolean recordBatchedScanSettings(int responsibleUid, int csph, Bundle bundle) { BatchedScanSettings settings = bundle.getParcelable(BATCHED_SETTING); WorkSource responsibleWorkSource = bundle.getParcelable(BATCHED_WORKSOURCE); if (DBG) { log("set batched scan to " + settings + " for uid=" + responsibleUid + ", worksource=" + responsibleWorkSource); } if (settings != null) { if (settings.equals(mBatchedScanSettings)) return false; } else { if (mBatchedScanSettings == null) return false; } mBatchedScanSettings = settings; if (responsibleWorkSource == null) responsibleWorkSource = new WorkSource(responsibleUid); mBatchedScanWorkSource = responsibleWorkSource; mBatchedScanCsph = csph; return true; } private void stopBatchedScan() { mAlarmManager.cancel(mBatchedScanIntervalIntent); retrieveBatchedScanData(); mWifiNative.setBatchedScanSettings(null); noteBatchedScanStop(); } private void setNextBatchedAlarm(int scansExpected) { if (mBatchedScanSettings == null || scansExpected < 1) return; mBatchedScanMinPollTime = System.currentTimeMillis() + mBatchedScanSettings.scanIntervalSec * 1000; if (mBatchedScanSettings.maxScansPerBatch < scansExpected) { scansExpected = mBatchedScanSettings.maxScansPerBatch; } int secToFull = mBatchedScanSettings.scanIntervalSec; secToFull *= scansExpected; int debugPeriod = SystemProperties.getInt("wifi.batchedScan.pollPeriod", 0); if (debugPeriod > 0) secToFull = debugPeriod; // set the alarm to do the next poll. We set it a little short as we'd rather // wake up wearly than miss a scan due to buffer overflow mAlarmManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + ((secToFull - (mBatchedScanSettings.scanIntervalSec / 2)) * 1000), mBatchedScanIntervalIntent); } /** * 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 void retrieveBatchedScanData() { String rawData = mWifiNative.getBatchedScanResults(); if (DEBUG_PARSE) log("rawData = " + rawData); mBatchedScanMinPollTime = 0; if (rawData == null || rawData.equalsIgnoreCase("OK")) { loge("Unexpected BatchedScanResults :" + rawData); return; } int scanCount = 0; final String END_OF_BATCHES = "----"; final String SCANCOUNT = "scancount="; final String TRUNCATED = "trunc"; final String AGE = "age="; final String DIST = "dist="; final String DISTSD = "distSd="; String splitData[] = rawData.split("\n"); int n = 0; if (splitData[n].startsWith(SCANCOUNT)) { try { scanCount = Integer.parseInt(splitData[n++].substring(SCANCOUNT.length())); } catch (NumberFormatException e) { loge("scancount parseInt Exception from " + splitData[n]); } } else log("scancount not found"); if (scanCount == 0) { loge("scanCount==0 - aborting"); return; } final Intent intent = new Intent(WifiManager.BATCHED_SCAN_RESULTS_AVAILABLE_ACTION); intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); synchronized (mBatchedScanResults) { mBatchedScanResults.clear(); BatchedScanResult batchedScanResult = new BatchedScanResult(); String bssid = null; WifiSsid wifiSsid = null; int level = 0; int freq = 0; int dist, distSd; long tsf = 0; dist = distSd = ScanResult.UNSPECIFIED; final long now = SystemClock.elapsedRealtime(); final int bssidStrLen = BSSID_STR.length(); while (true) { while (n < splitData.length) { if (DEBUG_PARSE) logd("parsing " + splitData[n]); if (splitData[n].equals(END_OF_BATCHES)) { if (n+1 != splitData.length) { loge("didn't consume " + (splitData.length-n)); } if (mBatchedScanResults.size() > 0) { mContext.sendBroadcastAsUser(intent, UserHandle.ALL); } logd("retrieveBatchedScanResults X"); return; } if ((splitData[n].equals(END_STR)) || splitData[n].equals(DELIMITER_STR)) { if (bssid != null) { batchedScanResult.scanResults.add(new ScanResult( wifiSsid, bssid, "", level, freq, tsf, dist, distSd)); wifiSsid = null; bssid = null; level = 0; freq = 0; tsf = 0; dist = distSd = ScanResult.UNSPECIFIED; } if (splitData[n].equals(END_STR)) { if (batchedScanResult.scanResults.size() != 0) { mBatchedScanResults.add(batchedScanResult); batchedScanResult = new BatchedScanResult(); } else { logd("Found empty batch"); } } } else if (splitData[n].equals(TRUNCATED)) { batchedScanResult.truncated = true; } else if (splitData[n].startsWith(BSSID_STR)) { bssid = new String(splitData[n].getBytes(), bssidStrLen, splitData[n].length() - bssidStrLen); } else if (splitData[n].startsWith(FREQ_STR)) { try { freq = Integer.parseInt(splitData[n].substring(FREQ_STR.length())); } catch (NumberFormatException e) { loge("Invalid freqency: " + splitData[n]); freq = 0; } } else if (splitData[n].startsWith(AGE)) { try { tsf = now - Long.parseLong(splitData[n].substring(AGE.length())); tsf *= 1000; // convert mS -> uS } catch (NumberFormatException e) { loge("Invalid timestamp: " + splitData[n]); tsf = 0; } } else if (splitData[n].startsWith(SSID_STR)) { wifiSsid = WifiSsid.createFromAsciiEncoded( splitData[n].substring(SSID_STR.length())); } else if (splitData[n].startsWith(LEVEL_STR)) { try { level = Integer.parseInt(splitData[n].substring(LEVEL_STR.length())); if (level > 0) level -= 256; } catch (NumberFormatException e) { loge("Invalid level: " + splitData[n]); level = 0; } } else if (splitData[n].startsWith(DIST)) { try { dist = Integer.parseInt(splitData[n].substring(DIST.length())); } catch (NumberFormatException e) { loge("Invalid distance: " + splitData[n]); dist = ScanResult.UNSPECIFIED; } } else if (splitData[n].startsWith(DISTSD)) { try { distSd = Integer.parseInt(splitData[n].substring(DISTSD.length())); } catch (NumberFormatException e) { loge("Invalid distanceSd: " + splitData[n]); distSd = ScanResult.UNSPECIFIED; } } else { loge("Unable to parse batched scan result line: " + splitData[n]); } n++; } rawData = mWifiNative.getBatchedScanResults(); if (DEBUG_PARSE) log("reading more data:\n" + rawData); if (rawData == null) { loge("Unexpected null BatchedScanResults"); return; } splitData = rawData.split("\n"); if (splitData.length == 0 || splitData[0].equals("ok")) { loge("batch scan results just ended!"); if (mBatchedScanResults.size() > 0) { mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); } return; } n = 0; } } } private long mDisconnectedTimeStamp = 0; public long getDisconnectedTimeMilli() { if (getCurrentState() == mDisconnectedState && mDisconnectedTimeStamp != 0) { long now_ms = System.currentTimeMillis(); return now_ms - mDisconnectedTimeStamp; } return 0; } // Keeping track of scan requests private long lastStartScanTimeStamp = 0; private long lastScanDuration = 0; // Last connect attempt is used to prevent scan requests: // - for a period of 10 seconds after attempting to connect private long lastConnectAttempt = 0; private String 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 (lastConnectAttempt != 0 && (now - lastConnectAttempt) < 10000) { Message dmsg = Message.obtain(msg); sendMessageDelayed(dmsg, 11000 - (now - lastConnectAttempt)); return false; } return true; } private int mOnTime = 0; private int mTxTime = 0; private int mRxTime = 0; private int mOnTimeStartScan = 0; private int mTxTimeStartScan = 0; private int mRxTimeStartScan = 0; private int mOnTimeScan = 0; private int mTxTimeScan = 0; private int mRxTimeScan = 0; private int mOnTimeThisScan = 0; private int mTxTimeThisScan = 0; private int mRxTimeThisScan = 0; private int mOnTimeScreenStateChange = 0; private int mOnTimeAtLastReport = 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 (dbg) { loge(stats.toString()); } } } if (stats == null || mWifiLinkLayerStatsSupported <= 0) { long mTxPkts = TrafficStats.getTxPackets(mInterfaceName); long mRxPkts = TrafficStats.getRxPackets(mInterfaceName); mWifiInfo.updatePacketRates(mTxPkts, mRxPkts); } else { mWifiInfo.updatePacketRates(stats); } return stats; } void startRadioScanStats() { WifiLinkLayerStats stats = getWifiLinkLayerStats(false); if (stats != null) { mOnTimeStartScan = stats.on_time; mTxTimeStartScan = stats.tx_time; mRxTimeStartScan = stats.rx_time; mOnTime = stats.on_time; mTxTime = stats.tx_time; mRxTime = stats.rx_time; } } void closeRadioScanStats() { WifiLinkLayerStats stats = getWifiLinkLayerStats(false); if (stats != null) { mOnTimeThisScan = stats.on_time - mOnTimeStartScan; mTxTimeThisScan = stats.tx_time - mTxTimeStartScan; mRxTimeThisScan = stats.rx_time - mRxTimeStartScan; mOnTimeScan += mOnTimeThisScan; mTxTimeScan += mTxTimeThisScan; mRxTimeScan += mRxTimeThisScan; } } // If workSource is not null, blame is given to it, otherwise blame is given to callingUid. private void noteScanStart(int callingUid, WorkSource workSource) { long now = System.currentTimeMillis(); lastStartScanTimeStamp = now; lastScanDuration = 0; if (DBG) { String ts = String.format("[%,d ms]", now); if (workSource != null) { loge(ts + " noteScanStart" + workSource.toString() + " uid " + Integer.toString(callingUid)); } else { loge(ts + " noteScanstart no scan source" + " uid " + Integer.toString(callingUid)); } } startRadioScanStats(); if (mScanWorkSource == null && ((callingUid != UNKNOWN_SCAN_SOURCE && callingUid != SCAN_ALARM_SOURCE) || workSource != null)) { mScanWorkSource = workSource != null ? workSource : new WorkSource(callingUid); try { mBatteryStats.noteWifiScanStartedFromSource(mScanWorkSource); } catch (RemoteException e) { log(e.toString()); } } } private void noteScanEnd() { long now = System.currentTimeMillis(); if (lastStartScanTimeStamp != 0) { lastScanDuration = now - lastStartScanTimeStamp; } lastStartScanTimeStamp = 0; if (DBG) { String ts = String.format("[%,d ms]", now); if (mScanWorkSource != null) loge(ts + " noteScanEnd " + mScanWorkSource.toString() + " onTime=" + mOnTimeThisScan); else loge(ts + " noteScanEnd no scan source" + " onTime=" + mOnTimeThisScan); } if (mScanWorkSource != null) { try { mBatteryStats.noteWifiScanStoppedFromSource(mScanWorkSource); } catch (RemoteException e) { log(e.toString()); } finally { mScanWorkSource = null; } } } private void noteBatchedScanStart() { if (PDBG) loge("noteBatchedScanstart()"); // note the end of a previous scan set if (mNotedBatchedScanWorkSource != null && (mNotedBatchedScanWorkSource.equals(mBatchedScanWorkSource) == false || mNotedBatchedScanCsph != mBatchedScanCsph)) { try { mBatteryStats.noteWifiBatchedScanStoppedFromSource(mNotedBatchedScanWorkSource); } catch (RemoteException e) { log(e.toString()); } finally { mNotedBatchedScanWorkSource = null; mNotedBatchedScanCsph = 0; } } // note the start of the new try { mBatteryStats.noteWifiBatchedScanStartedFromSource(mBatchedScanWorkSource, mBatchedScanCsph); mNotedBatchedScanWorkSource = mBatchedScanWorkSource; mNotedBatchedScanCsph = mBatchedScanCsph; } catch (RemoteException e) { log(e.toString()); } } private void noteBatchedScanStop() { if (PDBG) loge("noteBatchedScanstop()"); if (mNotedBatchedScanWorkSource != null) { try { mBatteryStats.noteWifiBatchedScanStoppedFromSource(mNotedBatchedScanWorkSource); } catch (RemoteException e) { log(e.toString()); } finally { mNotedBatchedScanWorkSource = null; mNotedBatchedScanCsph = 0; } } } private void handleScanRequest(int type, 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); } // parse scan settings String freqs = null; if (settings != null && settings.channelSet != null) { StringBuilder sb = new StringBuilder(); boolean first = true; for (WifiChannel channel : settings.channelSet) { if (!first) sb.append(','); else first = false; sb.append(channel.freqMHz); } freqs = sb.toString(); } // call wifi native to start the scan if (startScanNative(type, freqs)) { // only count battery consumption if scan request is accepted noteScanStart(message.arg1, 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; } } /** return true iff scan request is accepted */ private boolean startScanNative(int type, String freqs) { if (mWifiNative.scan(type, freqs)) { mIsScanOngoing = true; mIsFullScanOngoing = (freqs == null); lastScanFreqs = freqs; return true; } return false; } /** * 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) { mWifiApConfigChannel.sendMessage(CMD_SET_AP_CONFIG, config); } public WifiConfiguration syncGetWifiApConfiguration() { Message resultMsg = mWifiApConfigChannel.sendMessageSynchronously(CMD_REQUEST_AP_CONFIG); WifiConfiguration ret = (WifiConfiguration) resultMsg.obj; resultMsg.recycle(); return ret; } /** * TODO: doc */ public int syncGetWifiState() { return mWifiState.get(); } /** * TODO: doc */ public String syncGetWifiStateByName() { switch (mWifiState.get()) { case WIFI_STATE_DISABLING: return "disabling"; case WIFI_STATE_DISABLED: return "disabled"; case WIFI_STATE_ENABLING: return "enabling"; case WIFI_STATE_ENABLED: return "enabled"; case WIFI_STATE_UNKNOWN: return "unknown state"; default: return "[invalid state]"; } } /** * TODO: doc */ public int syncGetWifiApState() { return mWifiApState.get(); } /** * TODO: doc */ public String syncGetWifiApStateByName() { switch (mWifiApState.get()) { case WIFI_AP_STATE_DISABLING: return "disabling"; case WIFI_AP_STATE_DISABLED: return "disabled"; case WIFI_AP_STATE_ENABLING: return "enabling"; case WIFI_AP_STATE_ENABLED: return "enabled"; case WIFI_AP_STATE_FAILED: return "failed"; default: return "[invalid state]"; } } /** * Get status information for the current connection, if any. * @return a {@link WifiInfo} object containing information about the current connection * */ public WifiInfo syncRequestConnectionInfo() { return mWifiInfo; } public 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); } /** * TODO: doc */ public List syncGetScanResultsList() { synchronized (mScanResultCache) { List scanList = new ArrayList(); for(ScanResult result: mScanResults) { scanList.add(new ScanResult(result)); } return scanList; } } public void disableEphemeralNetwork(String SSID) { if (SSID != null) { sendMessage(CMD_DISABLE_EPHEMERAL_NETWORK, SSID); } } /** * Get unsynchronized pointer to scan result list * Can be called only from AutoJoinController which runs in the WifiStateMachine context */ public List getScanResultsListNoCopyUnsync() { return mScanResults; } /** * 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 syncGetConfiguredNetworks(int uuid, AsyncChannel channel) { Message resultMsg = channel.sendMessageSynchronously(CMD_GET_CONFIGURED_NETWORKS, uuid); List result = (List) resultMsg.obj; resultMsg.recycle(); return result; } public List syncGetPrivilegedConfiguredNetwork(AsyncChannel channel) { Message resultMsg = channel.sendMessageSynchronously( CMD_GET_PRIVILEGED_CONFIGURED_NETWORKS); List result = (List) resultMsg.obj; resultMsg.recycle(); return result; } /** * 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); } void enableBackgroundScan(boolean enable) { if (enable) { mWifiConfigStore.enableAllNetworks(); } mWifiNative.enableBackgroundScan(enable); } /** * 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 startFilteringMulticastV4Packets() { mFilteringMulticastV4Packets.set(true); sendMessage(CMD_START_PACKET_FILTERING, MULTICAST_V4, 0); } /** * Stop filtering Multicast v4 packets */ public void stopFilteringMulticastV4Packets() { mFilteringMulticastV4Packets.set(false); sendMessage(CMD_STOP_PACKET_FILTERING, MULTICAST_V4, 0); } /** * Start filtering Multicast v4 packets */ public void startFilteringMulticastV6Packets() { sendMessage(CMD_START_PACKET_FILTERING, MULTICAST_V6, 0); } /** * Stop filtering Multicast v4 packets */ public void stopFilteringMulticastV6Packets() { sendMessage(CMD_STOP_PACKET_FILTERING, MULTICAST_V6, 0); } /** * Set high performance mode of operation. * Enabling would set active power mode and disable suspend optimizations; * disabling would set auto power mode and enable suspend optimizations * @param enable true if enable, false otherwise */ public void setHighPerfModeEnabled(boolean enable) { sendMessage(CMD_SET_HIGH_PERF_MODE, enable ? 1 : 0, 0); } /** * Set the country code * @param countryCode following ISO 3166 format * @param persist {@code true} if the setting should be remembered. */ public void setCountryCode(String countryCode, boolean persist) { // If it's a good country code, apply after the current // wifi connection is terminated; ignore resetting of code // for now (it is unclear what the chipset should do when // country code is reset) int countryCodeSequence = mCountryCodeSequence.incrementAndGet(); if (TextUtils.isEmpty(countryCode)) { log("Ignoring resetting of country code"); } else { sendMessage(CMD_SET_COUNTRY_CODE, countryCodeSequence, persist ? 1 : 0, countryCode); } } /** * Set the operational frequency band * @param band * @param persist {@code true} if the setting should be remembered. */ public void setFrequencyBand(int band, boolean persist) { if (persist) { Settings.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 mWifiConfigStore.getConfigFile(); } /** * Send a message indicating bluetooth adapter connection state changed */ public void sendBluetoothAdapterStateChange(int state) { sendMessage(CMD_BLUETOOTH_ADAPTER_STATE_CHANGE, state, 0); } /** * Save configuration on supplicant * * @return {@code true} if the operation succeeds, {@code false} otherwise * * TODO: deprecate this */ public boolean syncSaveConfig(AsyncChannel channel) { Message resultMsg = channel.sendMessageSynchronously(CMD_SAVE_CONFIG); boolean result = (resultMsg.arg1 != FAILURE); resultMsg.recycle(); return result; } public void updateBatteryWorkSource(WorkSource newSource) { synchronized (mRunningWifiUids) { try { if (newSource != null) { mRunningWifiUids.set(newSource); } if (mIsRunning) { if (mReportedRunning) { // If the work source has changed since last time, need // to remove old work from battery stats. if (mLastRunningWifiUids.diff(mRunningWifiUids)) { mBatteryStats.noteWifiRunningChanged(mLastRunningWifiUids, mRunningWifiUids); mLastRunningWifiUids.set(mRunningWifiUids); } } else { // Now being started, report it. mBatteryStats.noteWifiRunning(mRunningWifiUids); mLastRunningWifiUids.set(mRunningWifiUids); mReportedRunning = true; } } else { if (mReportedRunning) { // Last reported we were running, time to stop. mBatteryStats.noteWifiStopped(mLastRunningWifiUids); mLastRunningWifiUids.clear(); mReportedRunning = false; } } mWakeLock.setWorkSource(newSource); } catch (RemoteException ignore) { } } } @Override public 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)); pw.println("mEnableBackgroundScan " + mEnableBackgroundScan); pw.println("mLastSetCountryCode " + mLastSetCountryCode); pw.println("mPersistedCountryCode " + mPersistedCountryCode); mNetworkFactory.dump(fd, pw, args); mUntrustedNetworkFactory.dump(fd, pw, args); pw.println(); mWifiConfigStore.dump(fd, pw, args); } /********************************************************* * Internal private functions ********************************************************/ private void logStateAndMessage(Message message, String state) { messageHandlingStatus = 0; if (mLogMessages) { //long now = SystemClock.elapsedRealtimeNanos(); //String ts = String.format("[%,d us]", now/1000); loge( " " + state + " " + 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); } switch (msg.what) { 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"); if (lastStartScanTimeStamp != 0) { sb.append(" started:").append(lastStartScanTimeStamp); sb.append(",").append(now - lastStartScanTimeStamp); } if (lastScanDuration != 0) { sb.append(" dur:").append(lastScanDuration); } sb.append(" cnt=").append(mDelayedScanCounter); 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=").append(lastScanFreqs); } else { sb.append(" fiv=").append(fullBandConnectedTimeIntervalMilli); } 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)); sb.append(printTime()); 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); sb.append(" ajst=").append(lastForgetConfigurationAttempt.autoJoinStatus); } 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)); sb.append(printTime()); 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); if (lastScanDuration != 0) { sb.append(" dur:").append(lastScanDuration); } if (mOnTime != 0) { sb.append(" on:").append(mOnTimeThisScan).append(",").append(mOnTimeScan); sb.append(",").append(mOnTime); } if (mTxTime != 0) { sb.append(" tx:").append(mTxTimeThisScan).append(",").append(mTxTimeScan); sb.append(",").append(mTxTime); } if (mRxTime != 0) { sb.append(" rx:").append(mRxTimeThisScan).append(",").append(mRxTimeScan); sb.append(",").append(mRxTime); } sb.append(String.format(" bcn=%d", mRunningBeaconCount)); sb.append(String.format(" con=%d", mConnectionRequests)); key = mWifiConfigStore.getLastSelectedConfiguration(); if (key != null) { sb.append(" last=").append(key); } 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()); } sb.append(printTime()); key = mWifiConfigStore.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(Integer.toString(mAutoRoaming)); sb.append(printTime()); 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"); } sb.append(printTime()); 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) { sb.append(" cur=").append(config.configKey()); sb.append(" ajst=").append(config.autoJoinStatus); if (config.selfAdded) { sb.append(" selfAdded"); } if (config.status != 0) { sb.append(" st=").append(config.status); sb.append(" rs=").append(config.disableReason); } 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()); } } sb.append(printTime()); 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 (wifiScoringReport != null) { sb.append(wifiScoringReport); } 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 = (WifiConfiguration) msg.obj; 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(Integer.toString(mAutoRoaming)); sb.append(printTime()); 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(Integer.toString(mAutoRoaming)); sb.append(" fail count=").append(Integer.toString(mRoamFailCount)); sb.append(printTime()); 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 = mWifiConfigStore.getLastSelectedConfiguration(); if (key != null) { sb.append(" last=").append(key); } config = mWifiConfigStore.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(mWifiConfigStore.getConfiguredNetworksSize()); break; case DhcpStateMachine.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 DhcpStateMachine.CMD_POST_DHCP_ACTION: sb.append(" "); sb.append(Integer.toString(msg.arg1)); sb.append(" "); sb.append(Integer.toString(msg.arg2)); if (msg.arg1 == DhcpStateMachine.DHCP_SUCCESS) { sb.append(" OK "); } else if (msg.arg1 == DhcpStateMachine.DHCP_FAILURE) { sb.append(" FAIL "); } if (mLinkProperties != null) { if (mLinkProperties.hasIPv4Address()) { sb.append(" v4"); } if (mLinkProperties.hasGlobalIPv6Address()) { sb.append(" v6"); } if (mLinkProperties.hasIPv4DefaultRoute()) { sb.append(" v4r"); } if (mLinkProperties.hasIPv6DefaultRoute()) { sb.append(" v6r"); } if (mLinkProperties.hasIPv4DnsServer()) { sb.append(" v4dns"); } if (mLinkProperties.hasIPv6DnsServer()) { sb.append(" v6dns"); } } 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.numIpConfigFailures; 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(mWifiConfigStore.getMaxDhcpRetries())); if (mWifiInfo.getBSSID() != null) { sb.append(" ").append(mWifiInfo.getBSSID()); } if (c != null) { if (c.scanResultCache != null) { for (ScanResult r : c.scanResultCache.values()) { if (r.BSSID.equals(mWifiInfo.getBSSID())) { sb.append(" ipfail=").append(r.numIpConfigFailures); sb.append(",st=").append(r.autoJoinStatus); } } } sb.append(" -> ajst=").append(c.autoJoinStatus); sb.append(" ").append(c.disableReason); sb.append(" txpkts=").append(mWifiInfo.txSuccess); sb.append(",").append(mWifiInfo.txBad); sb.append(",").append(mWifiInfo.txRetries); } sb.append(printTime()); 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) { if (mLinkProperties.hasIPv4Address()) { sb.append(" v4"); } if (mLinkProperties.hasGlobalIPv6Address()) { sb.append(" v6"); } if (mLinkProperties.hasIPv4DefaultRoute()) { sb.append(" v4r"); } if (mLinkProperties.hasIPv6DefaultRoute()) { sb.append(" v6r"); } if (mLinkProperties.hasIPv4DnsServer()) { sb.append(" v4dns"); } if (mLinkProperties.hasIPv6DnsServer()) { sb.append(" v6dns"); } } break; case CMD_SET_COUNTRY_CODE: sb.append(" "); sb.append(Integer.toString(msg.arg1)); sb.append(" "); sb.append(Integer.toString(msg.arg2)); if (msg.obj != null) { sb.append(" ").append((String)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; 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, boolean startBackgroundScanIfNeeded) { mScreenOn = screenOn; if (PDBG) { loge(" handleScreenStateChanged Enter: screenOn=" + screenOn + " mUserWantsSuspendOpt=" + mUserWantsSuspendOpt + " state " + getCurrentState().getName() + " suppState:" + mSupplicantStateTracker.getSupplicantStateName()); } enableRssiPolling(screenOn); if (screenOn) enableAllNetworks(); if (mUserWantsSuspendOpt.get()) { if (screenOn) { sendMessage(CMD_SET_SUSPEND_OPT_ENABLED, 0, 0); } else { // Allow 2s for suspend optimizations to be set mSuspendWakeLock.acquire(2000); sendMessage(CMD_SET_SUSPEND_OPT_ENABLED, 1, 0); } } mScreenBroadcastReceived.set(true); getWifiLinkLayerStats(false); mOnTimeScreenStateChange = mOnTime; lastScreenStateChangeTimeStamp = lastLinkLayerStatsUpdate; mEnableBackgroundScan = false; cancelDelayedScan(); if (screenOn) { setScanAlarm(false); clearBlacklist(); fullBandConnectedTimeIntervalMilli = mWifiConfigStore.associatedPartialScanPeriodMilli; // In either Disconnectedstate or ConnectedState, // start the scan alarm so as to enable autojoin if (getCurrentState() == mConnectedState && mWifiConfigStore.enableAutoJoinScanWhenAssociated) { // Scan after 500ms startDelayedScan(500, null, null); } else if (getCurrentState() == mDisconnectedState) { // Scan after 200ms startDelayedScan(200, null, null); } } else if (startBackgroundScanIfNeeded) { // Screen Off and Disconnected and chipset doesn't support scan offload // => start scan alarm // Screen Off and Disconnected and chipset does support scan offload // => will use scan offload (i.e. background scan) if (!mBackgroundScanSupported) { setScanAlarm(true); } else { mEnableBackgroundScan = true; } } if (DBG) logd("backgroundScan enabled=" + mEnableBackgroundScan + " startBackgroundScanIfNeeded:" + startBackgroundScanIfNeeded); if (startBackgroundScanIfNeeded) { // to scan for them in background, we need all networks enabled enableBackgroundScan(mEnableBackgroundScan); } if (DBG) log("handleScreenStateChanged Exit: " + screenOn); } private void checkAndSetConnectivityInstance() { if (mCm == null) { mCm = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE); } } private boolean startTethering(ArrayList available) { boolean wifiAvailable = false; checkAndSetConnectivityInstance(); String[] wifiRegexs = mCm.getTetherableWifiRegexs(); for (String intf : available) { for (String regex : wifiRegexs) { if (intf.matches(regex)) { InterfaceConfiguration ifcg = null; try { ifcg = mNwService.getInterfaceConfig(intf); if (ifcg != null) { /* IP/netmask: 192.168.43.1/255.255.255.0 */ ifcg.setLinkAddress(new LinkAddress( NetworkUtils.numericToInetAddress("192.168.43.1"), 24)); ifcg.setInterfaceUp(); mNwService.setInterfaceConfig(intf, ifcg); } } catch (Exception e) { loge("Error configuring interface " + intf + ", :" + e); return false; } if(mCm.tether(intf) != ConnectivityManager.TETHER_ERROR_NO_ERROR) { loge("Error tethering on " + intf); return false; } mTetherInterfaceName = intf; return true; } } } // We found no interfaces to tether return false; } private void stopTethering() { checkAndSetConnectivityInstance(); /* Clear the interface config to allow dhcp correctly configure new ip settings */ InterfaceConfiguration ifcg = null; try { ifcg = mNwService.getInterfaceConfig(mTetherInterfaceName); if (ifcg != null) { ifcg.setLinkAddress( new LinkAddress(NetworkUtils.numericToInetAddress("0.0.0.0"), 0)); mNwService.setInterfaceConfig(mTetherInterfaceName, ifcg); } } catch (Exception e) { loge("Error resetting interface " + mTetherInterfaceName + ", :" + e); } if (mCm.untether(mTetherInterfaceName) != ConnectivityManager.TETHER_ERROR_NO_ERROR) { loge("Untether initiate failed!"); } } private boolean isWifiTethered(ArrayList active) { checkAndSetConnectivityInstance(); String[] wifiRegexs = mCm.getTetherableWifiRegexs(); for (String intf : active) { for (String regex : wifiRegexs) { if (intf.matches(regex)) { return true; } } } // We found no interfaces that are tethered return false; } /** * Set the country code from the system setting value, if any. */ private void setCountryCode() { String countryCode = Settings.Global.getString(mContext.getContentResolver(), Settings.Global.WIFI_COUNTRY_CODE); if (countryCode != null && !countryCode.isEmpty()) { setCountryCode(countryCode, false); } else { //use driver default } } /** * Set the frequency band from the system setting value, if any. */ private void setFrequencyBand() { int band = Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.WIFI_FREQUENCY_BAND, WifiManager.WIFI_FREQUENCY_BAND_AUTO); setFrequencyBand(band, false); } 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) { final int previousWifiApState = mWifiApState.get(); try { if (wifiApState == WIFI_AP_STATE_ENABLED) { mBatteryStats.noteWifiOn(); } else if (wifiApState == WIFI_AP_STATE_DISABLED) { mBatteryStats.noteWifiOff(); } } catch (RemoteException e) { loge("Failed to note battery stats in wifi"); } // Update state mWifiApState.set(wifiApState); if (DBG) log("setWifiApState: " + syncGetWifiApStateByName()); final Intent intent = new Intent(WifiManager.WIFI_AP_STATE_CHANGED_ACTION); intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); intent.putExtra(WifiManager.EXTRA_WIFI_AP_STATE, wifiApState); intent.putExtra(WifiManager.EXTRA_PREVIOUS_WIFI_AP_STATE, previousWifiApState); mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); } /* void ageOutScanResults(int age) { synchronized(mScanResultCache) { // Trim mScanResults, which prevent WifiStateMachine to return // obsolete scan results to queriers long now = System.CurrentTimeMillis(); for (int i = 0; i < mScanResults.size(); i++) { ScanResult result = mScanResults.get(i); if ((result.seen > now || (now - result.seen) > age)) { mScanResults.remove(i); } } } }*/ private static final String ID_STR = "id="; private static final String BSSID_STR = "bssid="; private static final String FREQ_STR = "freq="; private static final String LEVEL_STR = "level="; private static final String TSF_STR = "tsf="; private static final String FLAGS_STR = "flags="; private static final String SSID_STR = "ssid="; private static final String DELIMITER_STR = "===="; private static final String END_STR = "####"; int emptyScanResultCount = 0; // Used for matching BSSID strings, at least one characteer must be a non-zero number private static Pattern mNotZero = Pattern.compile("[1-9a-fA-F]"); /** * Format: * * id=1 * bssid=68:7f:76:d7:1a:6e * freq=2412 * level=-44 * tsf=1344626243700342 * flags=[WPA2-PSK-CCMP][WPS][ESS] * ssid=zfdy * ==== * id=2 * bssid=68:5f:74:d7:1a:6f * freq=5180 * level=-73 * tsf=1344626243700373 * flags=[WPA2-PSK-CCMP][WPS][ESS] * ssid=zuby * ==== */ private void setScanResults() { mNumScanResultsKnown = 0; mNumScanResultsReturned = 0; String bssid = ""; int level = 0; int freq = 0; long tsf = 0; String flags = ""; WifiSsid wifiSsid = null; String scanResults; String tmpResults; StringBuffer scanResultsBuf = new StringBuffer(); int sid = 0; while (true) { tmpResults = mWifiNative.scanResults(sid); if (TextUtils.isEmpty(tmpResults)) break; scanResultsBuf.append(tmpResults); scanResultsBuf.append("\n"); String[] lines = tmpResults.split("\n"); sid = -1; for (int i=lines.length - 1; i >= 0; i--) { if (lines[i].startsWith(END_STR)) { break; } else if (lines[i].startsWith(ID_STR)) { try { sid = Integer.parseInt(lines[i].substring(ID_STR.length())) + 1; } catch (NumberFormatException e) { // Nothing to do } break; } } if (sid == -1) break; } // Age out scan results, we return all scan results found in the last 12 seconds, // and NOT all scan results since last scan. // ageOutScanResults(12000); scanResults = scanResultsBuf.toString(); if (TextUtils.isEmpty(scanResults)) { emptyScanResultCount++; if (emptyScanResultCount > 10) { // If we got too many empty scan results, the current scan cache is stale, // hence clear it. mScanResults = new ArrayList(); } return; } emptyScanResultCount = 0; // note that all these splits and substrings keep references to the original // huge string buffer while the amount we really want is generally pretty small // so make copies instead (one example b/11087956 wasted 400k of heap here). synchronized(mScanResultCache) { mScanResults = new ArrayList(); String[] lines = scanResults.split("\n"); final int bssidStrLen = BSSID_STR.length(); final int flagLen = FLAGS_STR.length(); for (String line : lines) { if (line.startsWith(BSSID_STR)) { bssid = new String(line.getBytes(), bssidStrLen, line.length() - bssidStrLen); } else if (line.startsWith(FREQ_STR)) { try { freq = Integer.parseInt(line.substring(FREQ_STR.length())); } catch (NumberFormatException e) { freq = 0; } } else if (line.startsWith(LEVEL_STR)) { try { level = Integer.parseInt(line.substring(LEVEL_STR.length())); /* some implementations avoid negative values by adding 256 * so we need to adjust for that here. */ if (level > 0) level -= 256; } catch(NumberFormatException e) { level = 0; } } else if (line.startsWith(TSF_STR)) { try { tsf = Long.parseLong(line.substring(TSF_STR.length())); } catch (NumberFormatException e) { tsf = 0; } } else if (line.startsWith(FLAGS_STR)) { flags = new String(line.getBytes(), flagLen, line.length() - flagLen); } else if (line.startsWith(SSID_STR)) { wifiSsid = WifiSsid.createFromAsciiEncoded( line.substring(SSID_STR.length())); } else if (line.startsWith(DELIMITER_STR) || line.startsWith(END_STR)) { Matcher match = null; if (bssid!= null) { match = mNotZero.matcher(bssid); } if (match != null && !bssid.isEmpty() && match.find()) { String ssid = (wifiSsid != null) ? wifiSsid.toString() : WifiSsid.NONE; String key = bssid + ssid; ScanResult scanResult = mScanResultCache.get(key); if (scanResult != null) { // TODO: average the RSSI, instead of overwriting it scanResult.level = level; scanResult.wifiSsid = wifiSsid; // Keep existing API scanResult.SSID = (wifiSsid != null) ? wifiSsid.toString() : WifiSsid.NONE; scanResult.capabilities = flags; scanResult.frequency = freq; scanResult.timestamp = tsf; scanResult.seen = System.currentTimeMillis(); } else { scanResult = new ScanResult( wifiSsid, bssid, flags, level, freq, tsf); scanResult.seen = System.currentTimeMillis(); mScanResultCache.put(key, scanResult); } mNumScanResultsReturned ++; // Keep track of how many scan results we got // as part of this scan's processing mScanResults.add(scanResult); } else { if (bssid != null) { loge("setScanResults obtaining null BSSID results <" + bssid + ">, discard it"); } } bssid = null; level = 0; freq = 0; tsf = 0; flags = ""; wifiSsid = null; } } } boolean attemptAutoJoin = true; SupplicantState state = mWifiInfo.getSupplicantState(); String selection = mWifiConfigStore.getLastSelectedConfiguration(); if (getCurrentState() == mRoamingState || getCurrentState() == mObtainingIpState || getCurrentState() == mScanModeState || getCurrentState() == mDisconnectingState || (getCurrentState() == mConnectedState && !mWifiConfigStore.enableAutoJoinWhenAssociated) || linkDebouncing || state == SupplicantState.ASSOCIATING || state == SupplicantState.AUTHENTICATING || state == SupplicantState.FOUR_WAY_HANDSHAKE || state == SupplicantState.GROUP_HANDSHAKE || (/* keep autojoin enabled if user has manually selected a wifi network, so as to make sure we reliably remain connected to this network */ mConnectionRequests == 0 && selection == null)) { // Dont attempt auto-joining again while we are already attempting to join // and/or obtaining Ip address attemptAutoJoin = false; } if (DBG) { if (selection == null) { selection = ""; } loge("wifi setScanResults state" + getCurrentState() + " sup_state=" + state + " debouncing=" + linkDebouncing + " mConnectionRequests=" + mConnectionRequests + " selection=" + selection); } if (attemptAutoJoin) { messageHandlingStatus = MESSAGE_HANDLING_STATUS_PROCESSED; } // Loose last selected configuration if we have been disconnected for 5 minutes if (getDisconnectedTimeMilli() > mWifiConfigStore.wifiConfigLastSelectionHysteresis) { mWifiConfigStore.setLastSelectedConfiguration(WifiConfiguration.INVALID_NETWORK_ID); } if (mWifiConfigStore.enableAutoJoinWhenAssociated) { synchronized(mScanResultCache) { // AutoJoincontroller will directly acces the scan result list and update it with // ScanResult status mNumScanResultsKnown = mWifiAutoJoinController.newSupplicantResults(attemptAutoJoin); } } 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 sendMessage(CMD_AUTO_ROAM, mLastNetworkId, 1, null); } } /* * Fetch RSSI, linkspeed, and frequency on current connection */ private void fetchRssiLinkSpeedAndFrequencyNative() { int newRssi = -1; int newLinkSpeed = -1; int newFrequency = -1; String signalPoll = mWifiNative.signalPoll(); if (signalPoll != null) { String[] lines = signalPoll.split("\n"); for (String line : lines) { String[] prop = line.split("="); if (prop.length < 2) continue; try { if (prop[0].equals("RSSI")) { newRssi = Integer.parseInt(prop[1]); } else if (prop[0].equals("LINKSPEED")) { newLinkSpeed = Integer.parseInt(prop[1]); } else if (prop[0].equals("FREQUENCY")) { newFrequency = Integer.parseInt(prop[1]); } } catch (NumberFormatException e) { //Ignore, defaults on rssi and linkspeed are assigned } } } if (PDBG) { loge("fetchRssiLinkSpeedAndFrequencyNative rssi=" + Integer.toString(newRssi) + " linkspeed=" + Integer.toString(newLinkSpeed)); } if (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); /* * Rather then sending the raw RSSI out every time it * changes, we precalculate the signal level that would * be displayed in the status bar, and only send the * broadcast if that much more coarse-grained number * changes. This cuts down greatly on the number of * broadcasts, at the cost of not informing others * interested in RSSI of all the changes in signal * level. */ int newSignalLevel = WifiManager.calculateSignalLevel(newRssi, WifiManager.RSSI_LEVELS); if (newSignalLevel != mLastSignalLevel) { sendRssiChangeBroadcast(newRssi); } mLastSignalLevel = newSignalLevel; } else { mWifiInfo.setRssi(WifiInfo.INVALID_RSSI); } if (newLinkSpeed != -1) { mWifiInfo.setLinkSpeed(newLinkSpeed); } if (newFrequency > 0) { if (ScanResult.is5GHz(newFrequency)) { mWifiConnectionStatistics.num5GhzConnected++; } if (ScanResult.is24GHz(newFrequency)) { mWifiConnectionStatistics.num24GhzConnected++; } mWifiInfo.setFrequency(newFrequency); } mWifiConfigStore.updateConfiguration(mWifiInfo); } /** * Determine if we need to switch network: * - the delta determine the urgency to switch and/or or the expected evilness of the disruption * - match the uregncy of the switch versus the packet usage at the interface */ boolean shouldSwitchNetwork(int networkDelta) { int delta; if (networkDelta <= 0) { return false; } delta = networkDelta; if (mWifiInfo != null) { if (!mWifiConfigStore.enableAutoJoinWhenAssociated && mWifiInfo.getNetworkId() != WifiConfiguration.INVALID_NETWORK_ID) { // If AutoJoin while associated is not enabled, // we should never switch network when already associated delta = -1000; } else { // TODO: Look at per AC packet count, do not switch if VO/VI traffic is present // TODO: at the interface. We should also discriminate between ucast and mcast, // TODO: since the rxSuccessRate include all the bonjour and Ipv6 // TODO: broadcasts if ((mWifiInfo.txSuccessRate > 20) || (mWifiInfo.rxSuccessRate > 80)) { delta -= 999; } else if ((mWifiInfo.txSuccessRate > 5) || (mWifiInfo.rxSuccessRate > 30)) { delta -= 6; } loge("WifiStateMachine shouldSwitchNetwork " + " txSuccessRate=" + String.format("%.2f", mWifiInfo.txSuccessRate) + " rxSuccessRate=" + String.format("%.2f", mWifiInfo.rxSuccessRate) + " delta " + networkDelta + " -> " + delta); } } else { loge("WifiStateMachine shouldSwitchNetwork " + " delta " + networkDelta + " -> " + delta); } if (delta > 0) { return true; } return false; } // 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; } int mBadLinkspeedcount = 0; // For debug, provide information about the last scoring operation String wifiScoringReport = null; private void calculateWifiScore(WifiLinkLayerStats stats) { StringBuilder sb = new StringBuilder(); int score = 56; // Starting score, temporarily hardcoded in between 50 and 60 boolean isBadLinkspeed = (mWifiInfo.is24GHz() && mWifiInfo.getLinkSpeed() < mWifiConfigStore.badLinkSpeed24) || (mWifiInfo.is5GHz() && mWifiInfo.getLinkSpeed() < mWifiConfigStore.badLinkSpeed5); boolean isGoodLinkspeed = (mWifiInfo.is24GHz() && mWifiInfo.getLinkSpeed() >= mWifiConfigStore.goodLinkSpeed24) || (mWifiInfo.is5GHz() && mWifiInfo.getLinkSpeed() >= mWifiConfigStore.goodLinkSpeed5); if (isBadLinkspeed) { if (mBadLinkspeedcount < 6) mBadLinkspeedcount++; } else { if (mBadLinkspeedcount > 0) mBadLinkspeedcount--; } if (isBadLinkspeed) sb.append(" bl(").append(mBadLinkspeedcount).append(")"); if (isGoodLinkspeed) sb.append(" gl"); /** * We want to make sure that we use the 24GHz RSSI thresholds if * there are 2.4GHz scan results * otherwise we end up lowering the score based on 5GHz values * which may cause a switch to LTE before roaming has a chance to try 2.4GHz * We also might unblacklist the configuation based on 2.4GHz * thresholds but joining 5GHz anyhow, and failing over to 2.4GHz because 5GHz is not good */ boolean use24Thresholds = false; boolean homeNetworkBoost = false; WifiConfiguration currentConfiguration = getCurrentWifiConfiguration(); if (currentConfiguration != null && currentConfiguration.scanResultCache != null) { currentConfiguration.setVisibility(12000); if (currentConfiguration.visibility != null) { if (currentConfiguration.visibility.rssi24 != WifiConfiguration.INVALID_RSSI && currentConfiguration.visibility.rssi24 >= (currentConfiguration.visibility.rssi5-2)) { use24Thresholds = true; } } if (currentConfiguration.scanResultCache.size() <= 6 && currentConfiguration.allowedKeyManagement.cardinality() == 1 && currentConfiguration.allowedKeyManagement. get(WifiConfiguration.KeyMgmt.WPA_PSK) == true) { // A PSK network with less than 6 known BSSIDs // This is most likely a home network and thus we want to stick to wifi more homeNetworkBoost = true; } } if (homeNetworkBoost) sb.append(" hn"); if (use24Thresholds) sb.append(" u24"); int rssi = mWifiInfo.getRssi() - 6 * mAggressiveHandover + (homeNetworkBoost ? WifiConfiguration.HOME_NETWORK_RSSI_BOOST : 0); sb.append(String.format(" rssi=%d ag=%d", rssi, mAggressiveHandover)); boolean is24GHz = use24Thresholds || mWifiInfo.is24GHz(); boolean isBadRSSI = (is24GHz && rssi < mWifiConfigStore.thresholdBadRssi24) || (!is24GHz && rssi < mWifiConfigStore.thresholdBadRssi5); boolean isLowRSSI = (is24GHz && rssi < mWifiConfigStore.thresholdLowRssi24) || (!is24GHz && mWifiInfo.getRssi() < mWifiConfigStore.thresholdLowRssi5); boolean isHighRSSI = (is24GHz && rssi >= mWifiConfigStore.thresholdGoodRssi24) || (!is24GHz && mWifiInfo.getRssi() >= mWifiConfigStore.thresholdGoodRssi5); if (isBadRSSI) sb.append(" br"); if (isLowRSSI) sb.append(" lr"); if (isHighRSSI) sb.append(" hr"); int penalizedDueToUserTriggeredDisconnect = 0; // For debug information if (currentConfiguration!= null && (mWifiInfo.txSuccessRate > 5 || mWifiInfo.rxSuccessRate > 5)) { if (isBadRSSI) { currentConfiguration.numTicksAtBadRSSI++; if (currentConfiguration.numTicksAtBadRSSI > 1000) { // We remained associated for a compound amount of time while passing // traffic, hence loose the corresponding user triggered disabled stats if (currentConfiguration.numUserTriggeredWifiDisableBadRSSI > 0) { currentConfiguration.numUserTriggeredWifiDisableBadRSSI--; } if (currentConfiguration.numUserTriggeredWifiDisableLowRSSI > 0) { currentConfiguration.numUserTriggeredWifiDisableLowRSSI--; } if (currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI > 0) { currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI--; } currentConfiguration.numTicksAtBadRSSI = 0; } if (mWifiConfigStore.enableWifiCellularHandoverUserTriggeredAdjustment && (currentConfiguration.numUserTriggeredWifiDisableBadRSSI > 0 || currentConfiguration.numUserTriggeredWifiDisableLowRSSI > 0 || currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI > 0)) { score = score -5; penalizedDueToUserTriggeredDisconnect = 1; sb.append(" p1"); } } else if (isLowRSSI) { currentConfiguration.numTicksAtLowRSSI++; if (currentConfiguration.numTicksAtLowRSSI > 1000) { // We remained associated for a compound amount of time while passing // traffic, hence loose the corresponding user triggered disabled stats if (currentConfiguration.numUserTriggeredWifiDisableLowRSSI > 0) { currentConfiguration.numUserTriggeredWifiDisableLowRSSI--; } if (currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI > 0) { currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI--; } currentConfiguration.numTicksAtLowRSSI = 0; } if (mWifiConfigStore.enableWifiCellularHandoverUserTriggeredAdjustment && (currentConfiguration.numUserTriggeredWifiDisableLowRSSI > 0 || currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI > 0)) { score = score -5; penalizedDueToUserTriggeredDisconnect = 2; sb.append(" p2"); } } else if (!isHighRSSI) { currentConfiguration.numTicksAtNotHighRSSI++; if (currentConfiguration.numTicksAtNotHighRSSI > 1000) { // We remained associated for a compound amount of time while passing // traffic, hence loose the corresponding user triggered disabled stats if (currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI > 0) { currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI--; } currentConfiguration.numTicksAtNotHighRSSI = 0; } if (mWifiConfigStore.enableWifiCellularHandoverUserTriggeredAdjustment && currentConfiguration.numUserTriggeredWifiDisableNotHighRSSI > 0) { score = score -5; penalizedDueToUserTriggeredDisconnect = 3; sb.append(" p3"); } } sb.append(String.format(" ticks %d,%d,%d", currentConfiguration.numTicksAtBadRSSI, currentConfiguration.numTicksAtLowRSSI, currentConfiguration.numTicksAtNotHighRSSI)); } if (PDBG) { String rssiStatus = ""; if (isBadRSSI) rssiStatus += " badRSSI "; else if (isHighRSSI) rssiStatus += " highRSSI "; else if (isLowRSSI) rssiStatus += " lowRSSI "; if (isBadLinkspeed) rssiStatus += " lowSpeed "; loge("calculateWifiScore freq=" + Integer.toString(mWifiInfo.getFrequency()) + " speed=" + Integer.toString(mWifiInfo.getLinkSpeed()) + " score=" + Integer.toString(mWifiInfo.score) + rssiStatus + " -> txbadrate=" + String.format( "%.2f", mWifiInfo.txBadRate ) + " txgoodrate=" + String.format("%.2f", mWifiInfo.txSuccessRate) + " txretriesrate=" + String.format("%.2f", mWifiInfo.txRetriesRate) + " rxrate=" + String.format("%.2f", mWifiInfo.rxSuccessRate) + " userTriggerdPenalty" + penalizedDueToUserTriggeredDisconnect); } if ((mWifiInfo.txBadRate >= 1) && (mWifiInfo.txSuccessRate < 3) && (isBadRSSI || isLowRSSI)) { // Link is stuck if (mWifiInfo.linkStuckCount < 5) mWifiInfo.linkStuckCount += 1; sb.append(String.format(" ls+=%d", mWifiInfo.linkStuckCount)); if (PDBG) loge(" bad link -> stuck count =" + Integer.toString(mWifiInfo.linkStuckCount)); } else if (mWifiInfo.txSuccessRate > 2 || mWifiInfo.txBadRate < 0.1) { if (mWifiInfo.linkStuckCount > 0) mWifiInfo.linkStuckCount -= 1; sb.append(String.format(" ls-=%d", mWifiInfo.linkStuckCount)); if (PDBG) loge(" good link -> stuck count =" + Integer.toString(mWifiInfo.linkStuckCount)); } sb.append(String.format(" [%d", score)); if (mWifiInfo.linkStuckCount > 1) { // Once link gets stuck for more than 3 seconds, start reducing the score score = score - 2 * (mWifiInfo.linkStuckCount - 1); } sb.append(String.format(",%d", score)); if (isBadLinkspeed) { score -= 4 ; if (PDBG) { loge(" isBadLinkspeed ---> count=" + mBadLinkspeedcount + " score=" + Integer.toString(score)); } } else if ((isGoodLinkspeed) && (mWifiInfo.txSuccessRate > 5)) { score += 4; // So as bad rssi alone dont kill us } sb.append(String.format(",%d", score)); if (isBadRSSI) { if (mWifiInfo.badRssiCount < 7) mWifiInfo.badRssiCount += 1; } else if (isLowRSSI) { mWifiInfo.lowRssiCount = 1; // Dont increment the lowRssi count above 1 if (mWifiInfo.badRssiCount > 0) { // Decrement bad Rssi count mWifiInfo.badRssiCount -= 1; } } else { mWifiInfo.badRssiCount = 0; mWifiInfo.lowRssiCount = 0; } score -= mWifiInfo.badRssiCount * 2 + mWifiInfo.lowRssiCount ; sb.append(String.format(",%d", score)); if (PDBG) loge(" badRSSI count" + Integer.toString(mWifiInfo.badRssiCount) + " lowRSSI count" + Integer.toString(mWifiInfo.lowRssiCount) + " --> score " + Integer.toString(score)); if (isHighRSSI) { score += 5; if (PDBG) loge(" isHighRSSI ---> score=" + Integer.toString(score)); } sb.append(String.format(",%d]", score)); sb.append(String.format(" brc=%d lrc=%d", mWifiInfo.badRssiCount, mWifiInfo.lowRssiCount)); //sanitize boundaries if (score > NetworkAgent.WIFI_BASE_SCORE) score = NetworkAgent.WIFI_BASE_SCORE; if (score < 0) score = 0; //report score if (score != mWifiInfo.score) { if (DBG) { loge("calculateWifiScore() report new score " + Integer.toString(score)); } mWifiInfo.score = score; if (mNetworkAgent != null) { mNetworkAgent.sendNetworkScore(score); } } wifiScoringReport = sb.toString(); } public double getTxPacketRate() { if (mWifiInfo != null) { return mWifiInfo.txSuccessRate; } return -1; } public double getRxPacketRate() { if (mWifiInfo != null) { return mWifiInfo.rxSuccessRate; } return -1; } /** * 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 boolean clearIPv4Address(String iface) { try { InterfaceConfiguration ifcg = new InterfaceConfiguration(); ifcg.setLinkAddress(new LinkAddress("0.0.0.0/0")); mNwService.setInterfaceConfig(iface, ifcg); return true; } catch (RemoteException e) { return false; } } private boolean isProvisioned(LinkProperties lp) { return lp.isProvisioned() || (mWifiConfigStore.isUsingStaticIp(mLastNetworkId) && lp.hasIPv4Address()); } /** * Updates mLinkProperties by merging information from various sources. * * This is needed because the information in mLinkProperties comes from multiple sources (DHCP, * netlink, static configuration, ...). When one of these sources of information has updated * link properties, we can't just assign them to mLinkProperties or we'd lose track of the * information that came from other sources. Instead, when one of those sources has new * information, we update the object that tracks the information from that source and then * call this method to apply the change to mLinkProperties. * * The information in mLinkProperties is currently obtained as follows: * - Interface name: set in the constructor. * - IPv4 and IPv6 addresses: netlink, passed in by mNetlinkTracker. * - IPv4 routes, DNS servers, and domains: DHCP. * - IPv6 routes and DNS servers: netlink, passed in by mNetlinkTracker. * - HTTP proxy: the wifi config store. */ private void updateLinkProperties(int reason) { LinkProperties newLp = new LinkProperties(); // Interface name and proxy are locally configured. newLp.setInterfaceName(mInterfaceName); newLp.setHttpProxy(mWifiConfigStore.getProxyProperties(mLastNetworkId)); // IPv4/v6 addresses, IPv6 routes and IPv6 DNS servers come from netlink. LinkProperties netlinkLinkProperties = mNetlinkTracker.getLinkProperties(); newLp.setLinkAddresses(netlinkLinkProperties.getLinkAddresses()); for (RouteInfo route : netlinkLinkProperties.getRoutes()) { newLp.addRoute(route); } for (InetAddress dns : netlinkLinkProperties.getDnsServers()) { newLp.addDnsServer(dns); } // IPv4 routes, DNS servers and domains come from mDhcpResults. synchronized (mDhcpResultsLock) { // Even when we're using static configuration, we don't need to look at the config // store, because static IP configuration also populates mDhcpResults. if ((mDhcpResults != null)) { for (RouteInfo route : mDhcpResults.getRoutes(mInterfaceName)) { newLp.addRoute(route); } for (InetAddress dns : mDhcpResults.dnsServers) { newLp.addDnsServer(dns); } newLp.setDomains(mDhcpResults.domains); } } final boolean linkChanged = !newLp.equals(mLinkProperties); final boolean wasProvisioned = isProvisioned(mLinkProperties); final boolean isProvisioned = isProvisioned(newLp); final boolean lostIPv4Provisioning = mLinkProperties.hasIPv4Address() && !newLp.hasIPv4Address(); final DetailedState detailedState = getNetworkDetailedState(); if (linkChanged) { if (DBG) { log("Link configuration changed for netId: " + mLastNetworkId + " old: " + mLinkProperties + " new: " + newLp); } mLinkProperties = newLp; if (TextUtils.isEmpty(mTcpBufferSizes) == false) { mLinkProperties.setTcpBufferSizes(mTcpBufferSizes); } if (mNetworkAgent != null) mNetworkAgent.sendLinkProperties(mLinkProperties); } if (DBG) { StringBuilder sb = new StringBuilder(); sb.append("updateLinkProperties nid: " + mLastNetworkId); sb.append(" state: " + detailedState); sb.append(" reason: " + smToString(reason)); if (mLinkProperties != null) { if (mLinkProperties.hasIPv4Address()) { sb.append(" v4"); } if (mLinkProperties.hasGlobalIPv6Address()) { sb.append(" v6"); } if (mLinkProperties.hasIPv4DefaultRoute()) { sb.append(" v4r"); } if (mLinkProperties.hasIPv6DefaultRoute()) { sb.append(" v6r"); } if (mLinkProperties.hasIPv4DnsServer()) { sb.append(" v4dns"); } if (mLinkProperties.hasIPv6DnsServer()) { sb.append(" v6dns"); } if (isProvisioned) { sb.append(" isprov"); } } loge(sb.toString()); } // If we just configured or lost IP configuration, do the needful. // We don't just call handleSuccessfulIpConfiguration() or handleIpConfigurationLost() // here because those should only be called if we're attempting to connect or already // connected, whereas updateLinkProperties can be called at any time. switch (reason) { case DhcpStateMachine.DHCP_SUCCESS: case CMD_STATIC_IP_SUCCESS: // IPv4 provisioning succeded. Advance to connected state. sendMessage(CMD_IP_CONFIGURATION_SUCCESSFUL); if (!isProvisioned) { // Can never happen unless DHCP reports success but isProvisioned thinks the // resulting configuration is invalid (e.g., no IPv4 address, or the state in // mLinkProperties is out of sync with reality, or there's a bug in this code). // TODO: disconnect here instead. If our configuration is not usable, there's no // point in staying connected, and if mLinkProperties is out of sync with // reality, that will cause problems in the future. loge("IPv4 config succeeded, but not provisioned"); } break; case DhcpStateMachine.DHCP_FAILURE: // DHCP failed. If we're not already provisioned, or we had IPv4 and now lost it, // give up and disconnect. // If we're already provisioned (e.g., IPv6-only network), stay connected. if (!isProvisioned || lostIPv4Provisioning) { sendMessage(CMD_IP_CONFIGURATION_LOST); } else { // DHCP failed, but we're provisioned (e.g., if we're on an IPv6-only network). sendMessage(CMD_IP_CONFIGURATION_SUCCESSFUL); // To be sure we don't get stuck with a non-working network if all we had is // IPv4, remove the IPv4 address from the interface (since we're using DHCP, // and DHCP failed). If we had an IPv4 address before, the deletion of the // address will cause a CMD_UPDATE_LINKPROPERTIES. If the IPv4 address was // necessary for provisioning, its deletion will cause us to disconnect. // // This shouldn't be needed, because on an IPv4-only network a DHCP failure will // have empty DhcpResults and thus empty LinkProperties, and isProvisioned will // not return true if we're using DHCP and don't have an IPv4 default route. So // for now it's only here for extra redundancy. However, it will increase // robustness if we move to getting IPv4 routes from netlink as well. loge("DHCP failure: provisioned, clearing IPv4 address."); if (!clearIPv4Address(mInterfaceName)) { sendMessage(CMD_IP_CONFIGURATION_LOST); } } break; case CMD_STATIC_IP_FAILURE: // Static configuration was invalid, or an error occurred in applying it. Give up. sendMessage(CMD_IP_CONFIGURATION_LOST); break; case CMD_UPDATE_LINKPROPERTIES: // IP addresses, DNS servers, etc. changed. Act accordingly. if (wasProvisioned && !isProvisioned) { // We no longer have a usable network configuration. Disconnect. sendMessage(CMD_IP_CONFIGURATION_LOST); } else if (!wasProvisioned && isProvisioned) { // We have a usable IPv6-only config. Advance to connected state. sendMessage(CMD_IP_CONFIGURATION_SUCCESSFUL); } if (linkChanged && getNetworkDetailedState() == DetailedState.CONNECTED) { // If anything has changed and we're already connected, send out a notification. sendLinkConfigurationChangedBroadcast(); } break; } } /** * Clears all our link properties. */ private void clearLinkProperties() { // Clear the link properties obtained from DHCP and netlink. synchronized (mDhcpResultsLock) { if (mDhcpResults != null) { mDhcpResults.clear(); } } mNetlinkTracker.clearLinkProperties(); // 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 (PDBG) { loge("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 (PDBG) { loge("updateDefaultRouteMacAddress reachable (tried again) :" + gateway.getHostAddress() + " found " + address); } } } } if (address != null) { mWifiConfigStore.setDefaultGwMacAddress(mLastNetworkId, address); } } } } return address; } private void sendScanResultsAvailableBroadcast() { Intent intent = new Intent(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION); intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 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) { intent.putExtra(WifiManager.EXTRA_WIFI_INFO, new WifiInfo(mWifiInfo)); } mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); } 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) { // 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); // 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); mWifiInfo.setSSID(stateChangeResult.wifiSsid); 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()); clearCurrentConfigBSSID("handleNetworkDisconnect"); stopDhcp(); try { mNwService.clearInterfaceAddresses(mInterfaceName); mNwService.disableIpv6(mInterfaceName); } catch (Exception e) { loge("Failed to clear addresses or disable ipv6" + e); } /* Reset data structures */ mBadLinkspeedcount = 0; mWifiInfo.reset(); linkDebouncing = false; /* Reset roaming parameters */ mAutoRoaming = WifiAutoJoinController.AUTO_JOIN_IDLE; /** * fullBandConnectedTimeIntervalMilli: * - start scans at mWifiConfigStore.associatedPartialScanPeriodMilli seconds interval * - exponentially increase to mWifiConfigStore.associatedFullScanMaxIntervalMilli * Initialize to sane value = 20 seconds */ fullBandConnectedTimeIntervalMilli = 20 * 1000; setNetworkDetailedState(DetailedState.DISCONNECTED); if (mNetworkAgent != null) { mNetworkAgent.sendNetworkInfo(mNetworkInfo); mNetworkAgent = null; } mWifiConfigStore.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() { /* Socket connection can be lost when we do a graceful shutdown * or when the driver is hung. Ensure supplicant is stopped here. */ mWifiMonitor.killSupplicant(mP2pSupported); mWifiNative.closeSupplicantConnection(); sendSupplicantConnectionChangedBroadcast(false); setWifiState(WIFI_STATE_DISABLED); } void handlePreDhcpSetup() { mDhcpActive = true; if (!mBluetoothConnectionActive) { /* * There are problems setting the Wi-Fi driver's power * mode to active when bluetooth coexistence mode is * enabled or sense. *

* 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. *

* 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); stopBatchedScan(); WifiNative.pauseScan(); // 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 = DhcpStateMachine.CMD_PRE_DHCP_ACTION_COMPLETE; msg.obj = mDhcpStateMachine; mWifiP2pChannel.sendMessage(msg); } void startDhcp() { if (mDhcpStateMachine == null) { mDhcpStateMachine = DhcpStateMachine.makeDhcpStateMachine( mContext, WifiStateMachine.this, mInterfaceName); } mDhcpStateMachine.registerForPreDhcpNotification(); mDhcpStateMachine.sendMessage(DhcpStateMachine.CMD_START_DHCP); } void renewDhcp() { if (mDhcpStateMachine == null) { mDhcpStateMachine = DhcpStateMachine.makeDhcpStateMachine( mContext, WifiStateMachine.this, mInterfaceName); } mDhcpStateMachine.registerForPreDhcpNotification(); mDhcpStateMachine.sendMessage(DhcpStateMachine.CMD_RENEW_DHCP); } void stopDhcp() { if (mDhcpStateMachine != null) { /* In case we were in middle of DHCP operation restore back powermode */ handlePostDhcpSetup(); mDhcpStateMachine.sendMessage(DhcpStateMachine.CMD_STOP_DHCP); } } 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); mDhcpActive = false; startBatchedScan(); WifiNative.restartScan(); } private void handleIPv4Success(DhcpResults dhcpResults, int reason) { if (PDBG) { loge("wifistatemachine handleIPv4Success <" + dhcpResults.toString() + ">"); loge("link address " + dhcpResults.ipAddress); } synchronized (mDhcpResultsLock) { mDhcpResults = dhcpResults; } Inet4Address addr = (Inet4Address) dhcpResults.ipAddress.getAddress(); if (isRoaming()) { if (addr instanceof Inet4Address) { int previousAddress = mWifiInfo.getIpAddress(); int newAddress = NetworkUtils.inetAddressToInt(addr); if (previousAddress != newAddress) { loge("handleIPv4Success, roaming and address changed" + mWifiInfo + " got: " + addr); } else { } } else { loge("handleIPv4Success, roaming and didnt get an IPv4 address" + addr.toString()); } } mWifiInfo.setInetAddress(addr); mWifiInfo.setMeteredHint(dhcpResults.hasMeteredHint()); updateLinkProperties(reason); } private void handleSuccessfulIpConfiguration() { mLastSignalLevel = -1; // Force update of signal strength WifiConfiguration c = getCurrentWifiConfiguration(); if (c != null) { // Reset IP failure tracking c.numConnectionFailures = 0; // Tell the framework whether the newly connected network is trusted or untrusted. updateCapabilities(c); } if (c != null) { ScanResult result = getCurrentScanResult(); if (result == null) { loge("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 mWifiNative.clearBlacklist(); } } } private void handleIPv4Failure(int reason) { synchronized(mDhcpResultsLock) { if (mDhcpResults != null) { mDhcpResults.clear(); } } if (PDBG) { loge("wifistatemachine handleIPv4Failure"); } updateLinkProperties(reason); } private void handleIpConfigurationLost() { mWifiInfo.setInetAddress(null); mWifiInfo.setMeteredHint(false); mWifiConfigStore.handleSSIDStateChange(mLastNetworkId, false, "DHCP FAILURE", mWifiInfo.getBSSID()); /* DHCP times out after about 30 seconds, we do a * disconnect thru supplicant, we will let autojoin retry connecting to the network */ mWifiNative.disconnect(); } /* Current design is to not set the config on a running hostapd but instead * stop and start tethering when user changes config on a running access point * * TODO: Add control channel setup through hostapd that allows changing config * on a running daemon */ private void startSoftApWithConfig(final WifiConfiguration config) { // Start hostapd on a separate thread new Thread(new Runnable() { public void run() { try { mNwService.startAccessPoint(config, mInterfaceName); } catch (Exception e) { loge("Exception in softap start " + e); try { mNwService.stopAccessPoint(mInterfaceName); mNwService.startAccessPoint(config, mInterfaceName); } catch (Exception e1) { loge("Exception in softap re-start " + e1); sendMessage(CMD_START_AP_FAILURE); return; } } if (DBG) log("Soft AP start successful"); sendMessage(CMD_START_AP_SUCCESS); } }).start(); } /* * 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) { mWifiAutoJoinController.setAllowUntrustedConnections(true); } } } @Override protected void releaseNetworkFor(NetworkRequest networkRequest) { if (!networkRequest.networkCapabilities.hasCapability( NetworkCapabilities.NET_CAPABILITY_TRUSTED)) { if (--mUntrustedReqCount == 0) { mWifiAutoJoinController.setAllowUntrustedConnections(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, getClass().getSimpleName()); 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) null); break; case CMD_GET_PRIVILEGED_CONFIGURED_NETWORKS: replyToMessage(message, message.what, (List) 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: String countryCode = mPersistedCountryCode; if (TextUtils.isEmpty(countryCode) == false) { Settings.Global.putString(mContext.getContentResolver(), Settings.Global.WIFI_COUNTRY_CODE, countryCode); // It may be that the state transition that should send this info // to the driver happened between mPersistedCountryCode getting set // and now, so simply persisting it here would mean we have sent // nothing to the driver. Send the cmd so it might be set now. int sequenceNum = mCountryCodeSequence.incrementAndGet(); sendMessageAtFrontOfQueue(CMD_SET_COUNTRY_CODE, sequenceNum, 0, countryCode); } maybeRegisterNetworkFactory(); break; case CMD_SET_BATCHED_SCAN: recordBatchedScanSettings(message.arg1, message.arg2, (Bundle)message.obj); break; case CMD_POLL_BATCHED_SCAN: handleBatchedScanPollRequest(); break; case CMD_START_NEXT_BATCHED_SCAN: startNextBatchedScan(); break; case CMD_SCREEN_STATE_CHANGED: handleScreenStateChanged(message.arg1 != 0, /* startBackgroundScanIfNeeded = */ false); 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_DELAYED_STOP_DRIVER: case CMD_DRIVER_START_TIMED_OUT: case CMD_START_AP: case CMD_START_AP_SUCCESS: case CMD_START_AP_FAILURE: case CMD_STOP_AP: case CMD_TETHER_STATE_CHANGE: case CMD_TETHER_NOTIFICATION_TIMED_OUT: case CMD_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.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_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_RSSI_POLL: case CMD_ENABLE_ALL_NETWORKS: case DhcpStateMachine.CMD_PRE_DHCP_ACTION: case DhcpStateMachine.CMD_POST_DHCP_ACTION: /* Handled by WifiApConfigStore */ case CMD_SET_AP_CONFIG: case CMD_SET_AP_CONFIG_COMPLETED: case CMD_REQUEST_AP_CONFIG: case CMD_RESPONSE_AP_CONFIG: case WifiWatchdogStateMachine.POOR_LINK_DETECTED: case WifiWatchdogStateMachine.GOOD_LINK_DETECTED: case CMD_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: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; break; case DhcpStateMachine.CMD_ON_QUIT: mDhcpStateMachine = null; break; case CMD_SET_SUSPEND_OPT_ENABLED: if (message.arg1 == 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: if (WifiNative.startHal()) { int featureSet = WifiNative.getSupportedFeatureSet(); replyToMessage(message, message.what, featureSet); } else { replyToMessage(message, message.what, 0); } 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(CMD_UPDATE_LINKPROPERTIES); break; case CMD_IP_CONFIGURATION_SUCCESSFUL: case CMD_IP_CONFIGURATION_LOST: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; break; case CMD_GET_CONNECTION_STATISTICS: replyToMessage(message, message.what, mWifiConnectionStatistics); break; default: loge("Error! unhandled message" + message); break; } return HANDLED; } } class InitialState extends State { @Override public void enter() { mWifiNative.unloadDriver(); if (mWifiP2pChannel == null) { mWifiP2pChannel = new AsyncChannel(); mWifiP2pChannel.connect(mContext, getHandler(), mWifiP2pServiceImpl.getP2pStateMachineMessenger()); } if (mWifiApConfigChannel == null) { mWifiApConfigChannel = new AsyncChannel(); WifiApConfigStore wifiApConfigStore = WifiApConfigStore.makeWifiApConfigStore( mContext, getHandler()); wifiApConfigStore.loadApConfiguration(); mWifiApConfigChannel.connectSync(mContext, getHandler(), wifiApConfigStore.getMessenger()); } } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case CMD_START_SUPPLICANT: if (mWifiNative.loadDriver()) { try { mNwService.wifiFirmwareReload(mInterfaceName, "STA"); } catch (Exception e) { loge("Failed to reload STA firmware " + e); // Continue } try { // A runtime crash can leave the interface up and // IP addresses configured, and this affects // connectivity when supplicant starts up. // Ensure interface is down and we have no IP // addresses before a supplicant start. mNwService.setInterfaceDown(mInterfaceName); mNwService.clearInterfaceAddresses(mInterfaceName); // Set privacy extensions mNwService.setInterfaceIpv6PrivacyExtensions(mInterfaceName, true); // IPv6 is enabled only as long as access point is connected since: // - IPv6 addresses and routes stick around after disconnection // - kernel is unaware when connected and fails to start IPv6 negotiation // - kernel can start autoconfiguration when 802.1x is not complete mNwService.disableIpv6(mInterfaceName); } catch (RemoteException re) { loge("Unable to change interface settings: " + re); } catch (IllegalStateException ie) { loge("Unable to change interface settings: " + ie); } /* Stop a running supplicant after a runtime restart * Avoids issues with drivers that do not handle interface down * on a running supplicant properly. */ mWifiMonitor.killSupplicant(mP2pSupported); if(mWifiNative.startSupplicant(mP2pSupported)) { setWifiState(WIFI_STATE_ENABLING); if (DBG) log("Supplicant start successful"); mWifiMonitor.startMonitoring(); transitionTo(mSupplicantStartingState); } else { loge("Failed to start supplicant!"); } } else { loge("Failed to load driver"); } break; case CMD_START_AP: if (mWifiNative.loadDriver()) { setWifiApState(WIFI_AP_STATE_ENABLING); transitionTo(mSoftApStartingState); } else { loge("Failed to load driver for softap"); } default: return NOT_HANDLED; } return HANDLED; } } class SupplicantStartingState extends State { private void initializeWpsDetails() { String detail; detail = SystemProperties.get("ro.product.name", ""); if (!mWifiNative.setDeviceName(detail)) { loge("Failed to set device name " + detail); } detail = SystemProperties.get("ro.product.manufacturer", ""); if (!mWifiNative.setManufacturer(detail)) { loge("Failed to set manufacturer " + detail); } detail = SystemProperties.get("ro.product.model", ""); if (!mWifiNative.setModelName(detail)) { loge("Failed to set model name " + detail); } detail = SystemProperties.get("ro.product.model", ""); if (!mWifiNative.setModelNumber(detail)) { loge("Failed to set model number " + detail); } detail = SystemProperties.get("ro.serialno", ""); if (!mWifiNative.setSerialNumber(detail)) { loge("Failed to set serial number " + detail); } if (!mWifiNative.setConfigMethods("physical_display virtual_push_button")) { loge("Failed to set WPS config methods"); } if (!mWifiNative.setDeviceType(mPrimaryDeviceType)) { loge("Failed to set primary device type " + mPrimaryDeviceType); } } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case WifiMonitor.SUP_CONNECTION_EVENT: if (DBG) log("Supplicant connection established"); setWifiState(WIFI_STATE_ENABLED); mSupplicantRestartCount = 0; /* Reset the supplicant state to indicate the supplicant * state is not known at this time */ mSupplicantStateTracker.sendMessage(CMD_RESET_SUPPLICANT_STATE); /* Initialize data structures */ mLastBssid = null; mLastNetworkId = WifiConfiguration.INVALID_NETWORK_ID; mLastSignalLevel = -1; mWifiInfo.setMacAddress(mWifiNative.getMacAddress()); mWifiNative.enableSaveConfig(); mWifiConfigStore.loadAndEnableAllNetworks(); if (mWifiConfigStore.enableVerboseLogging > 0) { enableVerboseLogging(mWifiConfigStore.enableVerboseLogging); } if (mWifiConfigStore.associatedPartialScanPeriodMilli < 0) { mWifiConfigStore.associatedPartialScanPeriodMilli = 0; } initializeWpsDetails(); sendSupplicantConnectionChangedBroadcast(true); transitionTo(mDriverStartedState); break; case WifiMonitor.SUP_DISCONNECTION_EVENT: if (++mSupplicantRestartCount <= SUPPLICANT_RESTART_TRIES) { loge("Failed to setup control channel, restart supplicant"); mWifiMonitor.killSupplicant(mP2pSupported); transitionTo(mInitialState); sendMessageDelayed(CMD_START_SUPPLICANT, SUPPLICANT_RESTART_INTERVAL_MSECS); } else { loge("Failed " + mSupplicantRestartCount + " times to start supplicant, unload driver"); mSupplicantRestartCount = 0; setWifiState(WIFI_STATE_UNKNOWN); transitionTo(mInitialState); } break; case CMD_START_SUPPLICANT: case CMD_STOP_SUPPLICANT: case CMD_START_AP: case CMD_STOP_AP: case CMD_START_DRIVER: case CMD_STOP_DRIVER: case CMD_SET_OPERATIONAL_MODE: case CMD_SET_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_START_PACKET_FILTERING: case CMD_STOP_PACKET_FILTERING: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DEFERRED; deferMessage(message); break; default: return NOT_HANDLED; } return HANDLED; } } class SupplicantStartedState extends State { @Override public void enter() { /* Wifi is available as long as we have a connection to supplicant */ mNetworkInfo.setIsAvailable(true); if (mNetworkAgent != null) mNetworkAgent.sendNetworkInfo(mNetworkInfo); int defaultInterval = mContext.getResources().getInteger( R.integer.config_wifi_supplicant_scan_interval); mSupplicantScanIntervalMs = Settings.Global.getLong(mContext.getContentResolver(), Settings.Global.WIFI_SUPPLICANT_SCAN_INTERVAL_MS, defaultInterval); mWifiNative.setScanInterval((int)mSupplicantScanIntervalMs / 1000); mWifiNative.setExternalSim(true); setRandomMacOui(); mWifiNative.enableAutoConnect(false); } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_STOP_SUPPLICANT: /* Supplicant stopped by user */ if (mP2pSupported) { transitionTo(mWaitForP2pDisableState); } else { transitionTo(mSupplicantStoppingState); } break; case WifiMonitor.SUP_DISCONNECTION_EVENT: /* Supplicant connection lost */ loge("Connection lost, restart supplicant"); handleSupplicantConnectionLoss(); handleNetworkDisconnect(); mSupplicantStateTracker.sendMessage(CMD_RESET_SUPPLICANT_STATE); if (mP2pSupported) { transitionTo(mWaitForP2pDisableState); } else { transitionTo(mInitialState); } sendMessageDelayed(CMD_START_SUPPLICANT, SUPPLICANT_RESTART_INTERVAL_MSECS); break; case WifiMonitor.SCAN_RESULTS_EVENT: maybeRegisterNetworkFactory(); // Make sure our NetworkFactory is registered closeRadioScanStats(); noteScanEnd(); setScanResults(); if (mIsFullScanOngoing || mSendScanResultsBroadcast) { /* Just updated results from full scan, let apps know about this */ sendScanResultsAvailableBroadcast(); } mSendScanResultsBroadcast = false; mIsScanOngoing = false; mIsFullScanOngoing = false; if (mBufferedScanMsg.size() > 0) sendMessage(mBufferedScanMsg.remove()); break; case CMD_PING_SUPPLICANT: boolean ok = mWifiNative.ping(); replyToMessage(message, message.what, ok ? SUCCESS : FAILURE); break; case CMD_GET_CAPABILITY_FREQ: String freqs = mWifiNative.getFreqCapability(); replyToMessage(message, message.what, freqs); break; case CMD_START_AP: /* Cannot start soft AP while in client mode */ loge("Failed to start soft AP with a running supplicant"); setWifiApState(WIFI_AP_STATE_FAILED); break; case CMD_SET_OPERATIONAL_MODE: mOperationalMode = message.arg1; mWifiConfigStore. setLastSelectedConfiguration(WifiConfiguration.INVALID_NETWORK_ID); break; case CMD_TARGET_BSSID: // Trying to associate to this BSSID if (message.obj != null) { mTargetRoamBSSID = (String) message.obj; } break; case CMD_GET_LINK_LAYER_STATS: WifiLinkLayerStats stats = getWifiLinkLayerStats(DBG); if (stats == null) { // When firmware doesnt support link layer stats, return an empty object stats = new WifiLinkLayerStats(); } replyToMessage(message, message.what, stats); break; default: return NOT_HANDLED; } return HANDLED; } @Override public void exit() { mNetworkInfo.setIsAvailable(false); if (mNetworkAgent != null) mNetworkAgent.sendNetworkInfo(mNetworkInfo); } } class SupplicantStoppingState extends State { @Override public void enter() { /* Send any reset commands to supplicant before shutting it down */ handleNetworkDisconnect(); if (mDhcpStateMachine != null) { mDhcpStateMachine.doQuit(); } String suppState = System.getProperty("init.svc.wpa_supplicant"); if (suppState == null) suppState = "unknown"; String p2pSuppState = System.getProperty("init.svc.p2p_supplicant"); if (p2pSuppState == null) p2pSuppState = "unknown"; loge("SupplicantStoppingState: stopSupplicant " + " init.svc.wpa_supplicant=" + suppState + " init.svc.p2p_supplicant=" + p2pSuppState); mWifiMonitor.stopSupplicant(); /* Send ourselves a delayed message to indicate failure after a wait time */ sendMessageDelayed(obtainMessage(CMD_STOP_SUPPLICANT_FAILED, ++mSupplicantStopFailureToken, 0), SUPPLICANT_RESTART_INTERVAL_MSECS); setWifiState(WIFI_STATE_DISABLING); mSupplicantStateTracker.sendMessage(CMD_RESET_SUPPLICANT_STATE); } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case WifiMonitor.SUP_CONNECTION_EVENT: loge("Supplicant connection received while stopping"); break; case WifiMonitor.SUP_DISCONNECTION_EVENT: if (DBG) log("Supplicant connection lost"); handleSupplicantConnectionLoss(); transitionTo(mInitialState); break; case CMD_STOP_SUPPLICANT_FAILED: if (message.arg1 == mSupplicantStopFailureToken) { loge("Timed out on a supplicant stop, kill and proceed"); handleSupplicantConnectionLoss(); transitionTo(mInitialState); } break; case CMD_START_SUPPLICANT: case CMD_STOP_SUPPLICANT: case CMD_START_AP: case CMD_STOP_AP: case CMD_START_DRIVER: case CMD_STOP_DRIVER: case CMD_SET_OPERATIONAL_MODE: case CMD_SET_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_START_PACKET_FILTERING: case CMD_STOP_PACKET_FILTERING: deferMessage(message); break; default: return NOT_HANDLED; } return HANDLED; } } class DriverStartingState extends State { private int mTries; @Override public void enter() { mTries = 1; /* Send ourselves a delayed message to start driver a second time */ sendMessageDelayed(obtainMessage(CMD_DRIVER_START_TIMED_OUT, ++mDriverStartToken, 0), DRIVER_START_TIME_OUT_MSECS); } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: SupplicantState state = handleSupplicantStateChange(message); /* If suplicant is exiting out of INTERFACE_DISABLED state into * a state that indicates driver has started, it is ready to * receive driver commands */ if (SupplicantState.isDriverActive(state)) { transitionTo(mDriverStartedState); } break; case CMD_DRIVER_START_TIMED_OUT: if (message.arg1 == mDriverStartToken) { if (mTries >= 2) { loge("Failed to start driver after " + mTries); transitionTo(mDriverStoppedState); } else { loge("Driver start failed, retrying"); mWakeLock.acquire(); mWifiNative.startDriver(); mWakeLock.release(); ++mTries; /* Send ourselves a delayed message to start driver again */ sendMessageDelayed(obtainMessage(CMD_DRIVER_START_TIMED_OUT, ++mDriverStartToken, 0), DRIVER_START_TIME_OUT_MSECS); } } break; /* Queue driver commands & connection events */ case CMD_START_DRIVER: case CMD_STOP_DRIVER: case WifiMonitor.NETWORK_CONNECTION_EVENT: case WifiMonitor.NETWORK_DISCONNECTION_EVENT: case WifiMonitor.AUTHENTICATION_FAILURE_EVENT: case WifiMonitor.ASSOCIATION_REJECTION_EVENT: case WifiMonitor.WPS_OVERLAP_EVENT: case CMD_SET_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_START_PACKET_FILTERING: case CMD_STOP_PACKET_FILTERING: case CMD_START_SCAN: case CMD_DISCONNECT: case CMD_REASSOCIATE: case CMD_RECONNECT: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DEFERRED; deferMessage(message); break; case WifiMonitor.SCAN_RESULTS_EVENT: // Loose scan results obtained in Driver Starting state, they can only confuse // the state machine break; default: return NOT_HANDLED; } return HANDLED; } } class DriverStartedState extends State { @Override public void enter() { if (PDBG) { loge("DriverStartedState enter"); } mIsRunning = true; mInDelayedStop = false; mDelayedStopCounter++; updateBatteryWorkSource(null); /** * Enable bluetooth coexistence scan mode when bluetooth connection is active. * When this mode is on, some of the low-level scan parameters used by the * driver are changed to reduce interference with bluetooth */ mWifiNative.setBluetoothCoexistenceScanMode(mBluetoothConnectionActive); /* set country code */ setCountryCode(); /* set frequency band of operation */ setFrequencyBand(); /* initialize network state */ setNetworkDetailedState(DetailedState.DISCONNECTED); /* Remove any filtering on Multicast v6 at start */ mWifiNative.stopFilteringMulticastV6Packets(); /* Reset Multicast v4 filtering state */ if (mFilteringMulticastV4Packets.get()) { mWifiNative.startFilteringMulticastV4Packets(); } else { mWifiNative.stopFilteringMulticastV4Packets(); } mDhcpActive = false; startBatchedScan(); if (mOperationalMode != CONNECT_MODE) { mWifiNative.disconnect(); mWifiConfigStore.disableAllNetworks(); if (mOperationalMode == SCAN_ONLY_WITH_WIFI_OFF_MODE) { setWifiState(WIFI_STATE_DISABLED); } transitionTo(mScanModeState); } else { // Status pulls in the current supplicant state and network connection state // events over the monitor connection. This helps framework sync up with // current supplicant state // TODO: actually check th supplicant status string and make sure the supplicant // is in disconnecte4d state. mWifiNative.status(); // Transitioning to Disconnected state will trigger a scan and subsequently AutoJoin transitionTo(mDisconnectedState); } // We may have missed screen update at boot if (mScreenBroadcastReceived.get() == false) { PowerManager powerManager = (PowerManager)mContext.getSystemService( Context.POWER_SERVICE); handleScreenStateChanged(powerManager.isScreenOn(), /* startBackgroundScanIfNeeded = */ false); } else { // Set the right suspend mode settings mWifiNative.setSuspendOptimizations(mSuspendOptNeedsDisabled == 0 && mUserWantsSuspendOpt.get()); } mWifiNative.setPowerSave(true); if (mP2pSupported) { if (mOperationalMode == CONNECT_MODE) { mWifiP2pChannel.sendMessage(WifiStateMachine.CMD_ENABLE_P2P); } else { // P2P statemachine starts in disabled state, and is not enabled until // CMD_ENABLE_P2P is sent from here; so, nothing needs to be done to // keep it disabled. } } 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_ENABLED); mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); if (PDBG) { loge("Driverstarted State enter done"); } } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_START_SCAN: handleScanRequest(WifiNative.SCAN_WITHOUT_CONNECTION_SETUP, message); break; case CMD_SET_BATCHED_SCAN: if (recordBatchedScanSettings(message.arg1, message.arg2, (Bundle)message.obj)) { if (mBatchedScanSettings != null) { startBatchedScan(); } else { stopBatchedScan(); } } break; case CMD_SET_COUNTRY_CODE: String country = (String) message.obj; final boolean persist = (message.arg2 == 1); final int sequence = message.arg1; if (sequence != mCountryCodeSequence.get()) { if (DBG) log("set country code ignored due to sequnce num"); break; } if (DBG) log("set country code " + country); if (persist) { mPersistedCountryCode = country; Settings.Global.putString(mContext.getContentResolver(), Settings.Global.WIFI_COUNTRY_CODE, country); } country = country.toUpperCase(Locale.ROOT); if (mLastSetCountryCode == null || country.equals(mLastSetCountryCode) == false) { if (mWifiNative.setCountryCode(country)) { mLastSetCountryCode = country; } else { loge("Failed to set country code " + country); } } mWifiP2pChannel.sendMessage(WifiP2pServiceImpl.SET_COUNTRY_CODE, country); break; case CMD_SET_FREQUENCY_BAND: int band = message.arg1; if (DBG) log("set frequency band " + band); if (mWifiNative.setBand(band)) { if (PDBG) loge("did set frequency band " + band); mFrequencyBand.set(band); // Flush old data - like scan results mWifiNative.bssFlush(); // Fetch the latest scan results when frequency band is set startScanNative(WifiNative.SCAN_WITHOUT_CONNECTION_SETUP, null); if (PDBG) loge("done set frequency band " + band); } else { loge("Failed to set frequency band " + band); } break; case CMD_BLUETOOTH_ADAPTER_STATE_CHANGE: mBluetoothConnectionActive = (message.arg1 != BluetoothAdapter.STATE_DISCONNECTED); mWifiNative.setBluetoothCoexistenceScanMode(mBluetoothConnectionActive); break; case CMD_STOP_DRIVER: int mode = message.arg1; /* Already doing a delayed stop */ if (mInDelayedStop) { if (DBG) log("Already in delayed stop"); break; } /* disconnect right now, but leave the driver running for a bit */ mWifiConfigStore.disableAllNetworks(); mInDelayedStop = true; mDelayedStopCounter++; if (DBG) log("Delayed stop message " + mDelayedStopCounter); /* send regular delayed shut down */ Intent driverStopIntent = new Intent(ACTION_DELAYED_DRIVER_STOP, null); driverStopIntent.setPackage(this.getClass().getPackage().getName()); driverStopIntent.putExtra(DELAYED_STOP_COUNTER, mDelayedStopCounter); mDriverStopIntent = PendingIntent.getBroadcast(mContext, DRIVER_STOP_REQUEST, driverStopIntent, PendingIntent.FLAG_UPDATE_CURRENT); mAlarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + mDriverStopDelayMs, mDriverStopIntent); break; case CMD_START_DRIVER: if (mInDelayedStop) { mInDelayedStop = false; mDelayedStopCounter++; mAlarmManager.cancel(mDriverStopIntent); if (DBG) log("Delayed stop ignored due to start"); if (mOperationalMode == CONNECT_MODE) { mWifiConfigStore.enableAllNetworks(); } } break; case CMD_DELAYED_STOP_DRIVER: if (DBG) log("delayed stop " + message.arg1 + " " + mDelayedStopCounter); if (message.arg1 != mDelayedStopCounter) break; if (getCurrentState() != mDisconnectedState) { mWifiNative.disconnect(); handleNetworkDisconnect(); } mWakeLock.acquire(); mWifiNative.stopDriver(); mWakeLock.release(); if (mP2pSupported) { transitionTo(mWaitForP2pDisableState); } else { transitionTo(mDriverStoppingState); } break; case CMD_START_PACKET_FILTERING: if (message.arg1 == MULTICAST_V6) { mWifiNative.startFilteringMulticastV6Packets(); } else if (message.arg1 == MULTICAST_V4) { mWifiNative.startFilteringMulticastV4Packets(); } else { loge("Illegal arugments to CMD_START_PACKET_FILTERING"); } break; case CMD_STOP_PACKET_FILTERING: if (message.arg1 == MULTICAST_V6) { mWifiNative.stopFilteringMulticastV6Packets(); } else if (message.arg1 == MULTICAST_V4) { mWifiNative.stopFilteringMulticastV4Packets(); } else { loge("Illegal arugments to CMD_STOP_PACKET_FILTERING"); } break; case CMD_SET_SUSPEND_OPT_ENABLED: if (message.arg1 == 1) { setSuspendOptimizationsNative(SUSPEND_DUE_TO_SCREEN, true); mSuspendWakeLock.release(); } else { setSuspendOptimizationsNative(SUSPEND_DUE_TO_SCREEN, false); } break; case CMD_SET_HIGH_PERF_MODE: if (message.arg1 == 1) { setSuspendOptimizationsNative(SUSPEND_DUE_TO_HIGH_PERF, false); } else { setSuspendOptimizationsNative(SUSPEND_DUE_TO_HIGH_PERF, true); } break; case CMD_ENABLE_TDLS: if (message.obj != null) { String remoteAddress = (String) message.obj; boolean enable = (message.arg1 == 1); mWifiNative.startTdls(remoteAddress, enable); } break; default: return NOT_HANDLED; } return HANDLED; } @Override public void exit() { mIsRunning = false; updateBatteryWorkSource(null); mScanResults = new ArrayList(); stopBatchedScan(); 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); noteScanEnd(); // wrap up any pending request. mBufferedScanMsg.clear(); mLastSetCountryCode = null; } } class WaitForP2pDisableState extends State { private State mTransitionToState; @Override public void enter() { switch (getCurrentMessage().what) { case WifiMonitor.SUP_DISCONNECTION_EVENT: mTransitionToState = mInitialState; break; case CMD_DELAYED_STOP_DRIVER: mTransitionToState = mDriverStoppingState; break; case CMD_STOP_SUPPLICANT: mTransitionToState = mSupplicantStoppingState; break; default: mTransitionToState = mDriverStoppingState; break; } mWifiP2pChannel.sendMessage(WifiStateMachine.CMD_DISABLE_P2P_REQ); } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case WifiStateMachine.CMD_DISABLE_P2P_RSP: transitionTo(mTransitionToState); break; /* Defer wifi start/shut and driver commands */ case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: case CMD_START_SUPPLICANT: case CMD_STOP_SUPPLICANT: case CMD_START_AP: case CMD_STOP_AP: case CMD_START_DRIVER: case CMD_STOP_DRIVER: case CMD_SET_OPERATIONAL_MODE: case CMD_SET_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_START_PACKET_FILTERING: case CMD_STOP_PACKET_FILTERING: case CMD_START_SCAN: case CMD_DISCONNECT: case CMD_REASSOCIATE: case CMD_RECONNECT: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DEFERRED; deferMessage(message); break; default: return NOT_HANDLED; } return HANDLED; } } class DriverStoppingState extends State { @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: SupplicantState state = handleSupplicantStateChange(message); if (state == SupplicantState.INTERFACE_DISABLED) { transitionTo(mDriverStoppedState); } break; /* Queue driver commands */ case CMD_START_DRIVER: case CMD_STOP_DRIVER: case CMD_SET_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_START_PACKET_FILTERING: case CMD_STOP_PACKET_FILTERING: case CMD_START_SCAN: case CMD_DISCONNECT: case CMD_REASSOCIATE: case CMD_RECONNECT: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DEFERRED; deferMessage(message); break; default: return NOT_HANDLED; } return HANDLED; } } class DriverStoppedState extends State { @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: StateChangeResult stateChangeResult = (StateChangeResult) message.obj; SupplicantState state = stateChangeResult.state; // A WEXT bug means that we can be back to driver started state // unexpectedly if (SupplicantState.isDriverActive(state)) { transitionTo(mDriverStartedState); } break; case CMD_START_DRIVER: mWakeLock.acquire(); mWifiNative.startDriver(); mWakeLock.release(); transitionTo(mDriverStartingState); break; default: return NOT_HANDLED; } return HANDLED; } } class ScanModeState extends State { private int mLastOperationMode; @Override public void enter() { mLastOperationMode = mOperationalMode; } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_SET_OPERATIONAL_MODE: if (message.arg1 == CONNECT_MODE) { if (mLastOperationMode == SCAN_ONLY_WITH_WIFI_OFF_MODE) { setWifiState(WIFI_STATE_ENABLED); // Load and re-enable networks when going back to enabled state // This is essential for networks to show up after restore mWifiConfigStore.loadAndEnableAllNetworks(); mWifiP2pChannel.sendMessage(CMD_ENABLE_P2P); } else { mWifiConfigStore.enableAllNetworks(); } // Try autojoining with recent network already present in the cache // If none are found then trigger a scan which will trigger autojoin // upon reception of scan results event if (!mWifiAutoJoinController.attemptAutoJoin()) { startScan(ENABLE_WIFI, 0, null, null); } // Loose last selection choice since user toggled WiFi mWifiConfigStore. setLastSelectedConfiguration(WifiConfiguration.INVALID_NETWORK_ID); mOperationalMode = CONNECT_MODE; transitionTo(mDisconnectedState); } else { // Nothing to do return HANDLED; } break; // Handle scan. All the connection related commands are // handled only in ConnectModeState case CMD_START_SCAN: handleScanRequest(WifiNative.SCAN_WITHOUT_CONNECTION_SETUP, message); break; default: return NOT_HANDLED; } return HANDLED; } } String smToString(Message message) { return smToString(message.what); } String smToString(int what) { String s = "unknown"; switch (what) { case WifiMonitor.DRIVER_HUNG_EVENT: s = "DRIVER_HUNG_EVENT"; break; case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: s = "AsyncChannel.CMD_CHANNEL_HALF_CONNECTED"; break; case AsyncChannel.CMD_CHANNEL_DISCONNECTED: s = "AsyncChannel.CMD_CHANNEL_DISCONNECTED"; break; case CMD_SET_FREQUENCY_BAND: s = "CMD_SET_FREQUENCY_BAND"; break; case CMD_DELAYED_NETWORK_DISCONNECT: s = "CMD_DELAYED_NETWORK_DISCONNECT"; break; case CMD_TEST_NETWORK_DISCONNECT: s = "CMD_TEST_NETWORK_DISCONNECT"; break; case CMD_OBTAINING_IP_ADDRESS_WATCHDOG_TIMER: s = "CMD_OBTAINING_IP_ADDRESS_WATCHDOG_TIMER"; break; case CMD_DISABLE_EPHEMERAL_NETWORK: s = "CMD_DISABLE_EPHEMERAL_NETWORK"; break; case CMD_START_DRIVER: s = "CMD_START_DRIVER"; break; case CMD_STOP_DRIVER: s = "CMD_STOP_DRIVER"; break; case CMD_STOP_SUPPLICANT: s = "CMD_STOP_SUPPLICANT"; break; case CMD_STOP_SUPPLICANT_FAILED: s = "CMD_STOP_SUPPLICANT_FAILED"; break; case CMD_START_SUPPLICANT: s = "CMD_START_SUPPLICANT"; break; case CMD_REQUEST_AP_CONFIG: s = "CMD_REQUEST_AP_CONFIG"; break; case CMD_RESPONSE_AP_CONFIG: s = "CMD_RESPONSE_AP_CONFIG"; break; case CMD_TETHER_STATE_CHANGE: s = "CMD_TETHER_STATE_CHANGE"; break; case CMD_TETHER_NOTIFICATION_TIMED_OUT: s = "CMD_TETHER_NOTIFICATION_TIMED_OUT"; break; case CMD_BLUETOOTH_ADAPTER_STATE_CHANGE: s = "CMD_BLUETOOTH_ADAPTER_STATE_CHANGE"; break; case CMD_ADD_OR_UPDATE_NETWORK: s = "CMD_ADD_OR_UPDATE_NETWORK"; break; case CMD_REMOVE_NETWORK: s = "CMD_REMOVE_NETWORK"; break; case CMD_ENABLE_NETWORK: s = "CMD_ENABLE_NETWORK"; break; case CMD_ENABLE_ALL_NETWORKS: s = "CMD_ENABLE_ALL_NETWORKS"; break; case CMD_AUTO_CONNECT: s = "CMD_AUTO_CONNECT"; break; case CMD_AUTO_ROAM: s = "CMD_AUTO_ROAM"; break; case CMD_AUTO_SAVE_NETWORK: s = "CMD_AUTO_SAVE_NETWORK"; break; case CMD_BOOT_COMPLETED: s = "CMD_BOOT_COMPLETED"; break; case DhcpStateMachine.CMD_START_DHCP: s = "CMD_START_DHCP"; break; case DhcpStateMachine.CMD_STOP_DHCP: s = "CMD_STOP_DHCP"; break; case DhcpStateMachine.CMD_RENEW_DHCP: s = "CMD_RENEW_DHCP"; break; case DhcpStateMachine.CMD_PRE_DHCP_ACTION: s = "CMD_PRE_DHCP_ACTION"; break; case DhcpStateMachine.CMD_POST_DHCP_ACTION: s = "CMD_POST_DHCP_ACTION"; break; case DhcpStateMachine.CMD_PRE_DHCP_ACTION_COMPLETE: s = "CMD_PRE_DHCP_ACTION_COMPLETE"; break; case DhcpStateMachine.CMD_ON_QUIT: s = "CMD_ON_QUIT"; break; case WifiP2pServiceImpl.DISCONNECT_WIFI_REQUEST: s = "WifiP2pServiceImpl.DISCONNECT_WIFI_REQUEST"; break; case WifiManager.DISABLE_NETWORK: s = "WifiManager.DISABLE_NETWORK"; break; case CMD_BLACKLIST_NETWORK: s = "CMD_BLACKLIST_NETWORK"; break; case CMD_CLEAR_BLACKLIST: s = "CMD_CLEAR_BLACKLIST"; break; case CMD_SAVE_CONFIG: s = "CMD_SAVE_CONFIG"; break; case CMD_GET_CONFIGURED_NETWORKS: s = "CMD_GET_CONFIGURED_NETWORKS"; break; case CMD_GET_SUPPORTED_FEATURES: s = "CMD_GET_ADAPTORS"; break; case CMD_UNWANTED_NETWORK: s = "CMD_UNWANTED_NETWORK"; break; case CMD_NETWORK_STATUS: s = "CMD_NETWORK_STATUS"; break; case CMD_GET_LINK_LAYER_STATS: s = "CMD_GET_LINK_LAYER_STATS"; break; case CMD_GET_PRIVILEGED_CONFIGURED_NETWORKS: s = "CMD_GET_PRIVILEGED_CONFIGURED_NETWORKS"; break; case CMD_DISCONNECT: s = "CMD_DISCONNECT"; break; case CMD_RECONNECT: s = "CMD_RECONNECT"; break; case CMD_REASSOCIATE: s = "CMD_REASSOCIATE"; break; case CMD_GET_CONNECTION_STATISTICS: s = "CMD_GET_CONNECTION_STATISTICS"; break; case CMD_SET_HIGH_PERF_MODE: s = "CMD_SET_HIGH_PERF_MODE"; break; case CMD_SET_COUNTRY_CODE: s = "CMD_SET_COUNTRY_CODE"; break; case CMD_ENABLE_RSSI_POLL: s = "CMD_ENABLE_RSSI_POLL"; break; case CMD_RSSI_POLL: s = "CMD_RSSI_POLL"; break; case CMD_START_PACKET_FILTERING: s = "CMD_START_PACKET_FILTERING"; break; case CMD_STOP_PACKET_FILTERING: s = "CMD_STOP_PACKET_FILTERING"; break; case CMD_SET_SUSPEND_OPT_ENABLED: s = "CMD_SET_SUSPEND_OPT_ENABLED"; break; case CMD_NO_NETWORKS_PERIODIC_SCAN: s = "CMD_NO_NETWORKS_PERIODIC_SCAN"; break; case CMD_SET_BATCHED_SCAN: s = "CMD_SET_BATCHED_SCAN"; break; case CMD_START_NEXT_BATCHED_SCAN: s = "CMD_START_NEXT_BATCHED_SCAN"; break; case CMD_POLL_BATCHED_SCAN: s = "CMD_POLL_BATCHED_SCAN"; break; case CMD_UPDATE_LINKPROPERTIES: s = "CMD_UPDATE_LINKPROPERTIES"; break; case CMD_RELOAD_TLS_AND_RECONNECT: s = "CMD_RELOAD_TLS_AND_RECONNECT"; break; case WifiManager.CONNECT_NETWORK: s = "CONNECT_NETWORK"; break; case WifiManager.SAVE_NETWORK: s = "SAVE_NETWORK"; break; case WifiManager.FORGET_NETWORK: s = "FORGET_NETWORK"; break; case WifiMonitor.SUP_CONNECTION_EVENT: s = "SUP_CONNECTION_EVENT"; break; case WifiMonitor.SUP_DISCONNECTION_EVENT: s = "SUP_DISCONNECTION_EVENT"; break; case WifiMonitor.SCAN_RESULTS_EVENT: s = "SCAN_RESULTS_EVENT"; break; case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: s = "SUPPLICANT_STATE_CHANGE_EVENT"; break; case WifiMonitor.AUTHENTICATION_FAILURE_EVENT: s = "AUTHENTICATION_FAILURE_EVENT"; break; case WifiMonitor.SSID_TEMP_DISABLED: s = "SSID_TEMP_DISABLED"; break; case WifiMonitor.SSID_REENABLED: s = "SSID_REENABLED"; break; case WifiMonitor.WPS_SUCCESS_EVENT: s = "WPS_SUCCESS_EVENT"; break; case WifiMonitor.WPS_FAIL_EVENT: s = "WPS_FAIL_EVENT"; break; case WifiMonitor.SUP_REQUEST_IDENTITY: s = "SUP_REQUEST_IDENTITY"; break; case WifiMonitor.NETWORK_CONNECTION_EVENT: s = "NETWORK_CONNECTION_EVENT"; break; case WifiMonitor.NETWORK_DISCONNECTION_EVENT: s = "NETWORK_DISCONNECTION_EVENT"; break; case WifiMonitor.ASSOCIATION_REJECTION_EVENT: s = "ASSOCIATION_REJECTION_EVENT"; break; case CMD_SET_OPERATIONAL_MODE: s = "CMD_SET_OPERATIONAL_MODE"; break; case CMD_START_SCAN: s = "CMD_START_SCAN"; break; case CMD_DISABLE_P2P_RSP: s = "CMD_DISABLE_P2P_RSP"; break; case CMD_DISABLE_P2P_REQ: s = "CMD_DISABLE_P2P_REQ"; break; case WifiWatchdogStateMachine.GOOD_LINK_DETECTED: s = "GOOD_LINK_DETECTED"; break; case WifiWatchdogStateMachine.POOR_LINK_DETECTED: s = "POOR_LINK_DETECTED"; break; case WifiP2pServiceImpl.GROUP_CREATING_TIMED_OUT: s = "GROUP_CREATING_TIMED_OUT"; break; case WifiP2pServiceImpl.P2P_CONNECTION_CHANGED: s = "P2P_CONNECTION_CHANGED"; break; case WifiP2pServiceImpl.DISCONNECT_WIFI_RESPONSE: s = "P2P.DISCONNECT_WIFI_RESPONSE"; break; case WifiP2pServiceImpl.SET_MIRACAST_MODE: s = "P2P.SET_MIRACAST_MODE"; break; case WifiP2pServiceImpl.BLOCK_DISCOVERY: s = "P2P.BLOCK_DISCOVERY"; break; case WifiP2pServiceImpl.SET_COUNTRY_CODE: s = "P2P.SET_COUNTRY_CODE"; break; case WifiManager.CANCEL_WPS: s = "CANCEL_WPS"; break; case WifiManager.CANCEL_WPS_FAILED: s = "CANCEL_WPS_FAILED"; break; case WifiManager.CANCEL_WPS_SUCCEDED: s = "CANCEL_WPS_SUCCEDED"; break; case WifiManager.START_WPS: s = "START_WPS"; break; case WifiManager.START_WPS_SUCCEEDED: s = "START_WPS_SUCCEEDED"; break; case WifiManager.WPS_FAILED: s = "WPS_FAILED"; break; case WifiManager.WPS_COMPLETED: s = "WPS_COMPLETED"; break; case WifiManager.RSSI_PKTCNT_FETCH: s = "RSSI_PKTCNT_FETCH"; break; case CMD_IP_CONFIGURATION_LOST: s = "CMD_IP_CONFIGURATION_LOST"; break; case CMD_IP_CONFIGURATION_SUCCESSFUL: s = "CMD_IP_CONFIGURATION_SUCCESSFUL"; break; case CMD_STATIC_IP_SUCCESS: s = "CMD_STATIC_IP_SUCCESSFUL"; break; case CMD_STATIC_IP_FAILURE: s = "CMD_STATIC_IP_FAILURE"; break; case DhcpStateMachine.DHCP_SUCCESS: s = "DHCP_SUCCESS"; break; case DhcpStateMachine.DHCP_FAILURE: s = "DHCP_FAILURE"; break; case CMD_TARGET_BSSID: s = "CMD_TARGET_BSSID"; break; case CMD_ASSOCIATED_BSSID: s = "CMD_ASSOCIATED_BSSID"; break; case CMD_ROAM_WATCHDOG_TIMER: s = "CMD_ROAM_WATCHDOG_TIMER"; break; case CMD_SCREEN_STATE_CHANGED: s = "CMD_SCREEN_STATE_CHANGED"; break; case CMD_DISCONNECTING_WATCHDOG_TIMER: s = "CMD_DISCONNECTING_WATCHDOG_TIMER"; break; default: s = "what:" + Integer.toString(what); break; } return s; } void registerConnected() { if (mLastNetworkId != WifiConfiguration.INVALID_NETWORK_ID) { long now_ms = System.currentTimeMillis(); // We are switching away from this configuration, // hence record the time we were connected last WifiConfiguration config = mWifiConfigStore.getWifiConfiguration(mLastNetworkId); if (config != null) { config.lastConnected = System.currentTimeMillis(); config.autoJoinBailedDueToLowRssi = false; config.setAutoJoinStatus(WifiConfiguration.AUTO_JOIN_ENABLED); config.numConnectionFailures = 0; config.numIpConfigFailures = 0; config.numAuthFailures = 0; config.numAssociation++; } mBadLinkspeedcount = 0; } } void registerDisconnected() { if (mLastNetworkId != WifiConfiguration.INVALID_NETWORK_ID) { long now_ms = System.currentTimeMillis(); // We are switching away from this configuration, // hence record the time we were connected last WifiConfiguration config = mWifiConfigStore.getWifiConfiguration(mLastNetworkId); if (config != null) { config.lastDisconnected = System.currentTimeMillis(); if (config.ephemeral) { // Remove ephemeral WifiConfigurations from file mWifiConfigStore.forgetNetwork(mLastNetworkId); } } } } void noteWifiDisabledWhileAssociated() { // We got disabled by user while we were associated, make note of it int rssi = mWifiInfo.getRssi(); WifiConfiguration config = getCurrentWifiConfiguration(); if (getCurrentState() == mConnectedState && rssi != WifiInfo.INVALID_RSSI && config != null) { boolean is24GHz = mWifiInfo.is24GHz(); boolean isBadRSSI = (is24GHz && rssi < mWifiConfigStore.thresholdBadRssi24) || (!is24GHz && rssi < mWifiConfigStore.thresholdBadRssi5); boolean isLowRSSI = (is24GHz && rssi < mWifiConfigStore.thresholdLowRssi24) || (!is24GHz && mWifiInfo.getRssi() < mWifiConfigStore.thresholdLowRssi5); boolean isHighRSSI = (is24GHz && rssi >= mWifiConfigStore.thresholdGoodRssi24) || (!is24GHz && mWifiInfo.getRssi() >= mWifiConfigStore.thresholdGoodRssi5); if (isBadRSSI) { // Take note that we got disabled while RSSI was Bad config.numUserTriggeredWifiDisableLowRSSI++; } else if (isLowRSSI) { // Take note that we got disabled while RSSI was Low config.numUserTriggeredWifiDisableBadRSSI++; } else if (!isHighRSSI) { // Take note that we got disabled while RSSI was Not high config.numUserTriggeredWifiDisableNotHighRSSI++; } } } WifiConfiguration getCurrentWifiConfiguration() { if (mLastNetworkId == WifiConfiguration.INVALID_NETWORK_ID) { return null; } return mWifiConfigStore.getWifiConfiguration(mLastNetworkId); } ScanResult getCurrentScanResult() { WifiConfiguration config = getCurrentWifiConfiguration(); if (config == null) { return null; } String BSSID = mWifiInfo.getBSSID(); if (BSSID == null) { BSSID = mTargetRoamBSSID; } if (config.scanResultCache == null) { return null; } return config.scanResultCache.get(BSSID); } String getCurrentBSSID() { if (linkDebouncing) { return null; } return mLastBssid; } class ConnectModeState extends State { @Override public boolean processMessage(Message message) { WifiConfiguration config; int netId; boolean ok; boolean didDisconnect; String bssid; String ssid; NetworkUpdateResult result; logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case WifiMonitor.ASSOCIATION_REJECTION_EVENT: didBlackListBSSID = false; bssid = (String) message.obj; if (bssid == null || TextUtils.isEmpty(bssid)) { // If BSSID is null, use the target roam BSSID bssid = mTargetRoamBSSID; } if (bssid != null) { // If we have a BSSID, tell configStore to black list it synchronized(mScanResultCache) { didBlackListBSSID = mWifiConfigStore.handleBSSIDBlackList (mLastNetworkId, bssid, false); } } mSupplicantStateTracker.sendMessage(WifiMonitor.ASSOCIATION_REJECTION_EVENT); break; case WifiMonitor.AUTHENTICATION_FAILURE_EVENT: mSupplicantStateTracker.sendMessage(WifiMonitor.AUTHENTICATION_FAILURE_EVENT); break; case WifiMonitor.SSID_TEMP_DISABLED: case WifiMonitor.SSID_REENABLED: String substr = (String) message.obj; String en = message.what == WifiMonitor.SSID_TEMP_DISABLED ? "temp-disabled" : "re-enabled"; loge("ConnectModeState SSID state=" + en + " nid=" + Integer.toString(message.arg1) + " [" + substr + "]"); synchronized(mScanResultCache) { mWifiConfigStore.handleSSIDStateChange(message.arg1, message.what == WifiMonitor.SSID_REENABLED, substr, mWifiInfo.getBSSID()); } break; case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: SupplicantState state = handleSupplicantStateChange(message); // A driver/firmware hang can now put the interface in a down state. // We detect the interface going down and recover from it if (!SupplicantState.isDriverActive(state)) { if (mNetworkInfo.getState() != NetworkInfo.State.DISCONNECTED) { handleNetworkDisconnect(); } log("Detected an interface down, restart driver"); transitionTo(mDriverStoppedState); sendMessage(CMD_START_DRIVER); break; } // Supplicant can fail to report a NETWORK_DISCONNECTION_EVENT // when authentication times out after a successful connection, // we can figure this from the supplicant state. If supplicant // state is DISCONNECTED, but the mNetworkInfo says we are not // disconnected, we need to handle a disconnection if (!linkDebouncing && state == SupplicantState.DISCONNECTED && mNetworkInfo.getState() != NetworkInfo.State.DISCONNECTED) { if (DBG) log("Missed CTRL-EVENT-DISCONNECTED, disconnect"); handleNetworkDisconnect(); transitionTo(mDisconnectedState); } break; case WifiP2pServiceImpl.DISCONNECT_WIFI_REQUEST: if (message.arg1 == 1) { mWifiNative.disconnect(); mTemporarilyDisconnectWifi = true; } else { mWifiNative.reconnect(); mTemporarilyDisconnectWifi = false; } break; case CMD_ADD_OR_UPDATE_NETWORK: config = (WifiConfiguration) message.obj; int res = mWifiConfigStore.addOrUpdateNetwork(config, message.sendingUid); if (res < 0) { messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL; } else { WifiConfiguration curConfig = getCurrentWifiConfiguration(); if (curConfig != null && config != null) { if (curConfig.priority < config.priority && config.status == WifiConfiguration.Status.ENABLED) { // Interpret this as a connect attempt // Set the last selected configuration so as to allow the system to // stick the last user choice without persisting the choice mWifiConfigStore.setLastSelectedConfiguration(res); // Remember time of last connection attempt lastConnectAttempt = System.currentTimeMillis(); mWifiConnectionStatistics.numWifiManagerJoinAttempt++; // As a courtesy to the caller, trigger a scan now startScan(ADD_OR_UPDATE_SOURCE, 0, null, null); } } } replyToMessage(message, CMD_ADD_OR_UPDATE_NETWORK, res); break; case CMD_REMOVE_NETWORK: ok = mWifiConfigStore.removeNetwork(message.arg1); if (!ok) { messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL; } replyToMessage(message, message.what, ok ? SUCCESS : FAILURE); break; case CMD_ENABLE_NETWORK: boolean others = message.arg2 == 1; // Tell autojoin the user did try to select to that network // However, do NOT persist the choice by bumping the priority of the network if (others) { mWifiAutoJoinController. updateConfigurationHistory(message.arg1, true, false); // Set the last selected configuration so as to allow the system to // stick the last user choice without persisting the choice mWifiConfigStore.setLastSelectedConfiguration(message.arg1); // Remember time of last connection attempt lastConnectAttempt = System.currentTimeMillis(); mWifiConnectionStatistics.numWifiManagerJoinAttempt++; } // Cancel auto roam requests autoRoamSetBSSID(message.arg1, "any"); ok = mWifiConfigStore.enableNetwork(message.arg1, message.arg2 == 1); if (!ok) { messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL; } replyToMessage(message, message.what, ok ? SUCCESS : FAILURE); break; case CMD_ENABLE_ALL_NETWORKS: long time = android.os.SystemClock.elapsedRealtime(); if (time - mLastEnableAllNetworksTime > MIN_INTERVAL_ENABLE_ALL_NETWORKS_MS) { mWifiConfigStore.enableAllNetworks(); mLastEnableAllNetworksTime = time; } break; case WifiManager.DISABLE_NETWORK: if (mWifiConfigStore.disableNetwork(message.arg1, WifiConfiguration.DISABLED_BY_WIFI_MANAGER) == true) { replyToMessage(message, WifiManager.DISABLE_NETWORK_SUCCEEDED); } else { messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL; replyToMessage(message, WifiManager.DISABLE_NETWORK_FAILED, WifiManager.ERROR); } break; case CMD_DISABLE_EPHEMERAL_NETWORK: config = mWifiConfigStore.disableEphemeralNetwork((String)message.obj); if (config != null) { if (config.networkId == mLastNetworkId) { // Disconnect and let autojoin reselect a new network sendMessage(CMD_DISCONNECT); } } break; case CMD_BLACKLIST_NETWORK: mWifiNative.addToBlacklist((String) message.obj); break; case CMD_CLEAR_BLACKLIST: mWifiNative.clearBlacklist(); break; case CMD_SAVE_CONFIG: ok = mWifiConfigStore.saveConfig(); if (DBG) loge("wifistatemachine did save config " + ok); replyToMessage(message, CMD_SAVE_CONFIG, ok ? SUCCESS : FAILURE); // Inform the backup manager about a data change IBackupManager ibm = IBackupManager.Stub.asInterface( ServiceManager.getService(Context.BACKUP_SERVICE)); if (ibm != null) { try { ibm.dataChanged("com.android.providers.settings"); } catch (Exception e) { // Try again later } } break; case CMD_GET_CONFIGURED_NETWORKS: replyToMessage(message, message.what, mWifiConfigStore.getConfiguredNetworks()); break; case WifiMonitor.SUP_REQUEST_IDENTITY: // Supplicant lacks credentials to connect to that network, hence black list ssid = (String) message.obj; if (targetWificonfiguration != null && ssid != null && targetWificonfiguration.SSID != null && targetWificonfiguration.SSID.equals("\"" + ssid + "\"")) { mWifiConfigStore.handleSSIDStateChange(targetWificonfiguration.networkId, false, "AUTH_FAILED no identity", null); } // Disconnect now, as we don't have any way to fullfill the supplicant request. mWifiConfigStore.setLastSelectedConfiguration (WifiConfiguration.INVALID_NETWORK_ID); mWifiNative.disconnect(); break; case WifiMonitor.SUP_REQUEST_SIM_AUTH: logd("Received SUP_REQUEST_SIM_AUTH"); SimAuthRequestData requestData = (SimAuthRequestData) message.obj; if (requestData != null) { if (requestData.protocol == WifiEnterpriseConfig.Eap.SIM) { handleGsmAuthRequest(requestData); } else if (requestData.protocol == WifiEnterpriseConfig.Eap.AKA) { handle3GAuthRequest(requestData); } } else { loge("Invalid sim auth request"); } break; case CMD_GET_PRIVILEGED_CONFIGURED_NETWORKS: replyToMessage(message, message.what, mWifiConfigStore.getPrivilegedConfiguredNetworks()); break; /* Do a redundant disconnect without transition */ case CMD_DISCONNECT: mWifiConfigStore.setLastSelectedConfiguration (WifiConfiguration.INVALID_NETWORK_ID); mWifiNative.disconnect(); break; case CMD_RECONNECT: mWifiAutoJoinController.attemptAutoJoin(); break; case CMD_REASSOCIATE: lastConnectAttempt = System.currentTimeMillis(); mWifiNative.reassociate(); break; case CMD_RELOAD_TLS_AND_RECONNECT: if (mWifiConfigStore.needsUnlockedKeyStore()) { logd("Reconnecting to give a chance to un-connected TLS networks"); mWifiNative.disconnect(); lastConnectAttempt = System.currentTimeMillis(); mWifiNative.reconnect(); } break; case CMD_AUTO_ROAM: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; return HANDLED; case CMD_AUTO_CONNECT: /* Work Around: wpa_supplicant can get in a bad state where it returns a non * associated status to the STATUS command but somehow-someplace still thinks * it is associated and thus will ignore select/reconnect command with * following message: * "Already associated with the selected network - do nothing" * * Hence, sends a disconnect to supplicant first. */ didDisconnect = false; if (getCurrentState() != mDisconnectedState) { /** Supplicant will ignore the reconnect if we are currently associated, * hence trigger a disconnect */ didDisconnect = true; mWifiNative.disconnect(); } /* connect command coming from auto-join */ config = (WifiConfiguration) message.obj; netId = message.arg1; int roam = message.arg2; loge("CMD_AUTO_CONNECT sup state " + mSupplicantStateTracker.getSupplicantStateName() + " my state " + getCurrentState().getName() + " nid=" + Integer.toString(netId) + " roam=" + Integer.toString(roam)); if (config == null) { loge("AUTO_CONNECT and no config, bail out..."); break; } /* Make sure we cancel any previous roam request */ autoRoamSetBSSID(netId, config.BSSID); /* Save the network config */ loge("CMD_AUTO_CONNECT will save config -> " + config.SSID + " nid=" + Integer.toString(netId)); result = mWifiConfigStore.saveNetwork(config, -1); netId = result.getNetworkId(); loge("CMD_AUTO_CONNECT did save config -> " + " nid=" + Integer.toString(netId)); // Make sure the network is enabled, since supplicant will not reenable it mWifiConfigStore.enableNetworkWithoutBroadcast(netId, false); if (mWifiConfigStore.selectNetwork(netId) && mWifiNative.reconnect()) { lastConnectAttempt = System.currentTimeMillis(); targetWificonfiguration = mWifiConfigStore.getWifiConfiguration(netId); config = mWifiConfigStore.getWifiConfiguration(netId); if (config != null && !mWifiConfigStore.isLastSelectedConfiguration(config)) { // If we autojoined a different config than the user selected one, // it means we could not see the last user selection, // or that the last user selection was faulty and ended up blacklisted // for some reason (in which case the user is notified with an error // message in the Wifi picker), and thus we managed to auto-join away // from the selected config. -> in that case we need to forget // the selection because we don't want to abruptly switch back to it. // // Note that the user selection is also forgotten after a period of time // during which the device has been disconnected. // The default value is 30 minutes : see the code path at bottom of // setScanResults() function. mWifiConfigStore. setLastSelectedConfiguration(WifiConfiguration.INVALID_NETWORK_ID); } mAutoRoaming = roam; if (isRoaming() || linkDebouncing) { transitionTo(mRoamingState); } else if (didDisconnect) { transitionTo(mDisconnectingState); } else { /* Already in disconnected state, nothing to change */ } } else { loge("Failed to connect config: " + config + " netId: " + netId); replyToMessage(message, WifiManager.CONNECT_NETWORK_FAILED, WifiManager.ERROR); break; } break; case WifiManager.CONNECT_NETWORK: /** * The connect message can contain a network id passed as arg1 on message or * or a config passed as obj on message. * For a new network, a config is passed to create and connect. * For an existing network, a network id is passed */ netId = message.arg1; config = (WifiConfiguration) message.obj; mWifiConnectionStatistics.numWifiManagerJoinAttempt++; boolean updatedExisting = false; /* Save the network config */ if (config != null) { String configKey = config.configKey(true /* allowCached */); WifiConfiguration savedConfig = mWifiConfigStore.getWifiConfiguration(configKey); if (savedConfig != null) { // There is an existing config with this netId, but it wasn't exposed // (either AUTO_JOIN_DELETED or ephemeral; see WifiConfigStore# // getConfiguredNetworks). Remove those bits and update the config. config = savedConfig; loge("CONNECT_NETWORK updating existing config with id=" + config.networkId + " configKey=" + configKey); config.ephemeral = false; config.autoJoinStatus = WifiConfiguration.AUTO_JOIN_ENABLED; updatedExisting = true; } result = mWifiConfigStore.saveNetwork(config, message.sendingUid); netId = result.getNetworkId(); } config = mWifiConfigStore.getWifiConfiguration(netId); if (config == null) { loge("CONNECT_NETWORK id=" + Integer.toString(netId) + " " + mSupplicantStateTracker.getSupplicantStateName() + " my state " + getCurrentState().getName()); } else { String wasSkipped = config.autoJoinBailedDueToLowRssi ? " skipped" : ""; loge("CONNECT_NETWORK id=" + Integer.toString(netId) + " config=" + config.SSID + " cnid=" + config.networkId + " supstate=" + mSupplicantStateTracker.getSupplicantStateName() + " my state " + getCurrentState().getName() + " uid = " + message.sendingUid + wasSkipped); } autoRoamSetBSSID(netId, "any"); if (message.sendingUid == Process.WIFI_UID || message.sendingUid == Process.SYSTEM_UID) { // As a sanity measure, clear the BSSID in the supplicant network block. // If system or Wifi Settings want to connect, they will not // specify the BSSID. // If an app however had added a BSSID to this configuration, and the BSSID // was wrong, Then we would forever fail to connect until that BSSID // is cleaned up. clearConfigBSSID(config, "CONNECT_NETWORK"); } mAutoRoaming = WifiAutoJoinController.AUTO_JOIN_IDLE; /* Tell autojoin the user did try to connect to that network */ mWifiAutoJoinController.updateConfigurationHistory(netId, true, true); mWifiConfigStore.setLastSelectedConfiguration(netId); didDisconnect = false; if (mLastNetworkId != WifiConfiguration.INVALID_NETWORK_ID && mLastNetworkId != netId) { /** Supplicant will ignore the reconnect if we are currently associated, * hence trigger a disconnect */ didDisconnect = true; mWifiNative.disconnect(); } // Make sure the network is enabled, since supplicant will not reenable it mWifiConfigStore.enableNetworkWithoutBroadcast(netId, false); if (mWifiConfigStore.selectNetwork(netId) && mWifiNative.reconnect()) { lastConnectAttempt = System.currentTimeMillis(); targetWificonfiguration = mWifiConfigStore.getWifiConfiguration(netId); /* The state tracker handles enabling networks upon completion/failure */ mSupplicantStateTracker.sendMessage(WifiManager.CONNECT_NETWORK); replyToMessage(message, WifiManager.CONNECT_NETWORK_SUCCEEDED); if (didDisconnect) { /* Expect a disconnection from the old connection */ transitionTo(mDisconnectingState); } else if (updatedExisting && getCurrentState() == mConnectedState && getCurrentWifiConfiguration().networkId == netId) { // Update the current set of network capabilities, but stay in the // current state. updateCapabilities(config); } else { /** * Directly go to disconnected state where we * process the connection events from supplicant **/ transitionTo(mDisconnectedState); } } else { loge("Failed to connect config: " + config + " netId: " + netId); replyToMessage(message, WifiManager.CONNECT_NETWORK_FAILED, WifiManager.ERROR); break; } break; case WifiManager.SAVE_NETWORK: mWifiConnectionStatistics.numWifiManagerJoinAttempt++; // Fall thru case WifiStateMachine.CMD_AUTO_SAVE_NETWORK: lastSavedConfigurationAttempt = null; // Used for debug config = (WifiConfiguration) message.obj; if (config == null) { loge("ERROR: SAVE_NETWORK with null configuration" + mSupplicantStateTracker.getSupplicantStateName() + " my state " + getCurrentState().getName()); messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL; replyToMessage(message, WifiManager.SAVE_NETWORK_FAILED, WifiManager.ERROR); break; } lastSavedConfigurationAttempt = new WifiConfiguration(config); int nid = config.networkId; loge("SAVE_NETWORK id=" + Integer.toString(nid) + " config=" + config.SSID + " nid=" + config.networkId + " supstate=" + mSupplicantStateTracker.getSupplicantStateName() + " my state " + getCurrentState().getName()); result = mWifiConfigStore.saveNetwork(config, -1); if (result.getNetworkId() != WifiConfiguration.INVALID_NETWORK_ID) { if (mWifiInfo.getNetworkId() == result.getNetworkId()) { if (result.hasIpChanged()) { // The currently connection configuration was changed // We switched from DHCP to static or from static to DHCP, or the // static IP address has changed. log("Reconfiguring IP on connection"); // TODO: clear addresses and disable IPv6 // to simplify obtainingIpState. transitionTo(mObtainingIpState); } if (result.hasProxyChanged()) { log("Reconfiguring proxy on connection"); updateLinkProperties(CMD_UPDATE_LINKPROPERTIES); } } replyToMessage(message, WifiManager.SAVE_NETWORK_SUCCEEDED); if (VDBG) { loge("Success save network nid=" + Integer.toString(result.getNetworkId())); } synchronized(mScanResultCache) { /** * If the command comes from WifiManager, then * tell autojoin the user did try to modify and save that network, * and interpret the SAVE_NETWORK as a request to connect */ boolean user = message.what == WifiManager.SAVE_NETWORK; mWifiAutoJoinController.updateConfigurationHistory(result.getNetworkId() , user, true); mWifiAutoJoinController.attemptAutoJoin(); } } else { loge("Failed to save network"); messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL; replyToMessage(message, WifiManager.SAVE_NETWORK_FAILED, WifiManager.ERROR); } break; case WifiManager.FORGET_NETWORK: // Debug only, remember last configuration that was forgotten WifiConfiguration toRemove = mWifiConfigStore.getWifiConfiguration(message.arg1); if (toRemove == null) { lastForgetConfigurationAttempt = null; } else { lastForgetConfigurationAttempt = new WifiConfiguration(toRemove); } if (mWifiConfigStore.forgetNetwork(message.arg1)) { replyToMessage(message, WifiManager.FORGET_NETWORK_SUCCEEDED); } else { loge("Failed to forget network"); replyToMessage(message, WifiManager.FORGET_NETWORK_FAILED, WifiManager.ERROR); } break; case WifiManager.START_WPS: WpsInfo wpsInfo = (WpsInfo) message.obj; WpsResult wpsResult; switch (wpsInfo.setup) { case WpsInfo.PBC: wpsResult = mWifiConfigStore.startWpsPbc(wpsInfo); break; case WpsInfo.KEYPAD: wpsResult = mWifiConfigStore.startWpsWithPinFromAccessPoint(wpsInfo); break; case WpsInfo.DISPLAY: wpsResult = mWifiConfigStore.startWpsWithPinFromDevice(wpsInfo); break; default: wpsResult = new WpsResult(Status.FAILURE); loge("Invalid setup for WPS"); break; } mWifiConfigStore.setLastSelectedConfiguration (WifiConfiguration.INVALID_NETWORK_ID); if (wpsResult.status == Status.SUCCESS) { replyToMessage(message, WifiManager.START_WPS_SUCCEEDED, wpsResult); transitionTo(mWpsRunningState); } else { loge("Failed to start WPS with config " + wpsInfo.toString()); replyToMessage(message, WifiManager.WPS_FAILED, WifiManager.ERROR); } break; case WifiMonitor.NETWORK_CONNECTION_EVENT: if (DBG) log("Network connection established"); mLastNetworkId = message.arg1; mLastBssid = (String) message.obj; mWifiInfo.setBSSID(mLastBssid); mWifiInfo.setNetworkId(mLastNetworkId); sendNetworkStateChangeBroadcast(mLastBssid); transitionTo(mObtainingIpState); break; case WifiMonitor.NETWORK_DISCONNECTION_EVENT: // Calling handleNetworkDisconnect here is redundant because we might already // have called it when leaving L2ConnectedState to go to disconnecting state // or thru other path // We should normally check the mWifiInfo or mLastNetworkId so as to check // if they are valid, and only in this case call handleNEtworkDisconnect, // TODO: this should be fixed for a L MR release // The side effect of calling handleNetworkDisconnect twice is that a bunch of // idempotent commands are executed twice (stopping Dhcp, enabling the SPS mode // at the chip etc... if (DBG) log("ConnectModeState: Network connection lost "); handleNetworkDisconnect(); transitionTo(mDisconnectedState); break; default: return NOT_HANDLED; } return HANDLED; } } private void updateCapabilities(WifiConfiguration config) { if (config.ephemeral) { mNetworkCapabilities.removeCapability( NetworkCapabilities.NET_CAPABILITY_TRUSTED); } else { mNetworkCapabilities.addCapability( NetworkCapabilities.NET_CAPABILITY_TRUSTED); } mNetworkAgent.sendNetworkCapabilities(mNetworkCapabilities); } private class WifiNetworkAgent extends NetworkAgent { public WifiNetworkAgent(Looper l, Context c, String TAG, NetworkInfo ni, NetworkCapabilities nc, LinkProperties lp, int score) { super(l, c, TAG, ni, nc, lp, score); } protected void unwanted() { // Ignore if we're not the current networkAgent. if (this != mNetworkAgent) return; if (DBG) log("WifiNetworkAgent -> Wifi unwanted score " + Integer.toString(mWifiInfo.score)); unwantedNetwork(network_status_unwanted_disconnect); } protected void networkStatus(int status) { if (status == NetworkAgent.INVALID_NETWORK) { if (DBG) log("WifiNetworkAgent -> Wifi networkStatus invalid, score=" + Integer.toString(mWifiInfo.score)); unwantedNetwork(network_status_unwanted_disable_autojoin); } else if (status == NetworkAgent.VALID_NETWORK) { if (DBG && mWifiInfo != null) log("WifiNetworkAgent -> Wifi networkStatus valid, score= " + Integer.toString(mWifiInfo.score)); doNetworkStatus(status); } } } void unwantedNetwork(int reason) { sendMessage(CMD_UNWANTED_NETWORK, reason); } void doNetworkStatus(int status) { sendMessage(CMD_NETWORK_STATUS, status); } boolean startScanForConfiguration(WifiConfiguration config, boolean restrictChannelList) { if (config == null) return false; // We are still seeing a fairly high power consumption triggered by autojoin scans // Hence do partial scans only for PSK configuration that are roamable since the // primary purpose of the partial scans is roaming. // Full badn scans with exponential backoff for the purpose or extended roaming and // network switching are performed unconditionally. if (config.scanResultCache == null || !config.allowedKeyManagement.get(WifiConfiguration.KeyMgmt.WPA_PSK) || config.scanResultCache.size() > 6) { //return true but to not trigger the scan return true; } HashSet channels = mWifiConfigStore.makeChannelList(config, ONE_HOUR_MILLI, restrictChannelList); if (channels != null && channels.size() != 0) { StringBuilder freqs = new StringBuilder(); boolean first = true; for (Integer channel : channels) { if (!first) freqs.append(","); freqs.append(channel.toString()); first = false; } //if (DBG) { loge("WifiStateMachine starting scan for " + config.configKey() + " with " + freqs); //} // Call wifi native to start the scan if (startScanNative( WifiNative.SCAN_WITHOUT_CONNECTION_SETUP, freqs.toString())) { // Only count battery consumption if scan request is accepted noteScanStart(SCAN_ALARM_SOURCE, null); messageHandlingStatus = MESSAGE_HANDLING_STATUS_OK; } else { // used for debug only, mark scan as failed messageHandlingStatus = MESSAGE_HANDLING_STATUS_HANDLING_ERROR; } return true; } else { if (DBG) loge("WifiStateMachine no channels for " + config.configKey()); return false; } } void clearCurrentConfigBSSID(String dbg) { // Clear the bssid in the current config's network block WifiConfiguration config = getCurrentWifiConfiguration(); if (config == null) return; clearConfigBSSID(config, dbg); } void clearConfigBSSID(WifiConfiguration config, String dbg) { if (config == null) return; if (DBG) { loge(dbg + " " + mTargetRoamBSSID + " config " + config.configKey() + " config.bssid " + config.BSSID); } config.autoJoinBSSID = "any"; config.BSSID = "any"; if (DBG) { loge(dbg + " " + config.SSID + " nid=" + Integer.toString(config.networkId)); } mWifiConfigStore.saveWifiConfigBSSID(config); } class L2ConnectedState extends State { @Override public void enter() { mRssiPollToken++; if (mEnableRssiPolling) { sendMessage(CMD_RSSI_POLL, mRssiPollToken, 0); } if (mNetworkAgent != null) { loge("Have NetworkAgent when entering L2Connected"); setNetworkDetailedState(DetailedState.DISCONNECTED); } setNetworkDetailedState(DetailedState.CONNECTING); if (TextUtils.isEmpty(mTcpBufferSizes) == false) { mLinkProperties.setTcpBufferSizes(mTcpBufferSizes); } mNetworkAgent = new WifiNetworkAgent(getHandler().getLooper(), mContext, "WifiNetworkAgent", mNetworkInfo, mNetworkCapabilitiesFilter, mLinkProperties, 60); // We must clear the config BSSID, as the wifi chipset may decide to roam // from this point on and having the BSSID specified in the network block would // cause the roam to faile and the device to disconnect clearCurrentConfigBSSID("L2ConnectedState"); } @Override public void exit() { // This is handled by receiving a NETWORK_DISCONNECTION_EVENT in ConnectModeState // Bug: 15347363 // For paranoia's sake, call handleNetworkDisconnect // only if BSSID is null or last networkId // is not invalid. if (DBG) { StringBuilder sb = new StringBuilder(); sb.append("leaving L2ConnectedState state nid=" + Integer.toString(mLastNetworkId)); if (mLastBssid !=null) { sb.append(" ").append(mLastBssid); } } if (mLastBssid != null || mLastNetworkId != WifiConfiguration.INVALID_NETWORK_ID) { handleNetworkDisconnect(); } } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case DhcpStateMachine.CMD_PRE_DHCP_ACTION: handlePreDhcpSetup(); break; case DhcpStateMachine.CMD_POST_DHCP_ACTION: handlePostDhcpSetup(); if (message.arg1 == DhcpStateMachine.DHCP_SUCCESS) { if (DBG) log("WifiStateMachine DHCP successful"); handleIPv4Success((DhcpResults) message.obj, DhcpStateMachine.DHCP_SUCCESS); // We advance to mVerifyingLinkState because handleIPv4Success will call // updateLinkProperties, which then sends CMD_IP_CONFIGURATION_SUCCESSFUL. } else if (message.arg1 == DhcpStateMachine.DHCP_FAILURE) { if (DBG) { int count = -1; WifiConfiguration config = getCurrentWifiConfiguration(); if (config != null) { count = config.numConnectionFailures; } log("WifiStateMachine DHCP failure count=" + count); } handleIPv4Failure(DhcpStateMachine.DHCP_FAILURE); // As above, we transition to mDisconnectingState via updateLinkProperties. } break; case CMD_IP_CONFIGURATION_SUCCESSFUL: handleSuccessfulIpConfiguration(); sendConnectedState(); transitionTo(mConnectedState); break; case CMD_IP_CONFIGURATION_LOST: // Get Link layer stats so as we get fresh tx packet counters getWifiLinkLayerStats(true); handleIpConfigurationLost(); transitionTo(mDisconnectingState); break; case CMD_DISCONNECT: mWifiNative.disconnect(); transitionTo(mDisconnectingState); break; case WifiP2pServiceImpl.DISCONNECT_WIFI_REQUEST: if (message.arg1 == 1) { mWifiNative.disconnect(); mTemporarilyDisconnectWifi = true; transitionTo(mDisconnectingState); } break; case CMD_SET_OPERATIONAL_MODE: if (message.arg1 != CONNECT_MODE) { sendMessage(CMD_DISCONNECT); deferMessage(message); if (message.arg1 == SCAN_ONLY_WITH_WIFI_OFF_MODE) { noteWifiDisabledWhileAssociated(); } } mWifiConfigStore. setLastSelectedConfiguration(WifiConfiguration.INVALID_NETWORK_ID); break; case CMD_SET_COUNTRY_CODE: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DEFERRED; deferMessage(message); break; case CMD_START_SCAN: //if (DBG) { loge("WifiStateMachine CMD_START_SCAN source " + message.arg1 + " txSuccessRate="+String.format( "%.2f", mWifiInfo.txSuccessRate) + " rxSuccessRate="+String.format( "%.2f", mWifiInfo.rxSuccessRate) + " targetRoamBSSID=" + mTargetRoamBSSID + " RSSI=" + mWifiInfo.getRssi()); //} if (message.arg1 == SCAN_ALARM_SOURCE) { // Check if the CMD_START_SCAN message is obsolete (and thus if it should // not be processed) and restart the scan if needed boolean shouldScan = mScreenOn && mWifiConfigStore.enableAutoJoinScanWhenAssociated; if (!checkAndRestartDelayedScan(message.arg2, shouldScan, mWifiConfigStore.associatedPartialScanPeriodMilli, null, null)) { messageHandlingStatus = MESSAGE_HANDLING_STATUS_OBSOLETE; loge("WifiStateMachine L2Connected CMD_START_SCAN source " + message.arg1 + " " + message.arg2 + ", " + mDelayedScanCounter + " -> obsolete"); return HANDLED; } if (mP2pConnected.get()) { loge("WifiStateMachine L2Connected CMD_START_SCAN source " + message.arg1 + " " + message.arg2 + ", " + mDelayedScanCounter + " ignore because P2P is connected"); messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; return HANDLED; } boolean tryFullBandScan = false; boolean restrictChannelList = false; long now_ms = System.currentTimeMillis(); if (DBG) { loge("WifiStateMachine CMD_START_SCAN with age=" + Long.toString(now_ms - lastFullBandConnectedTimeMilli) + " interval=" + fullBandConnectedTimeIntervalMilli + " maxinterval=" + maxFullBandConnectedTimeIntervalMilli); } if (mWifiInfo != null) { if (mWifiConfigStore.enableFullBandScanWhenAssociated && (now_ms - lastFullBandConnectedTimeMilli) > fullBandConnectedTimeIntervalMilli) { if (DBG) { loge("WifiStateMachine CMD_START_SCAN try full band scan age=" + Long.toString(now_ms - lastFullBandConnectedTimeMilli) + " interval=" + fullBandConnectedTimeIntervalMilli + " maxinterval=" + maxFullBandConnectedTimeIntervalMilli); } tryFullBandScan = true; } if (mWifiInfo.txSuccessRate > mWifiConfigStore.maxTxPacketForFullScans || mWifiInfo.rxSuccessRate > mWifiConfigStore.maxRxPacketForFullScans) { // Too much traffic at the interface, hence no full band scan if (DBG) { loge("WifiStateMachine CMD_START_SCAN " + "prevent full band scan due to pkt rate"); } tryFullBandScan = false; } if (mWifiInfo.txSuccessRate > mWifiConfigStore.maxTxPacketForPartialScans || mWifiInfo.rxSuccessRate > mWifiConfigStore.maxRxPacketForPartialScans) { // Don't scan if lots of packets are being sent restrictChannelList = true; if (mWifiConfigStore.alwaysEnableScansWhileAssociated == 0) { if (DBG) { loge("WifiStateMachine CMD_START_SCAN source " + message.arg1 + " ...and ignore scans" + " tx=" + String.format("%.2f", mWifiInfo.txSuccessRate) + " rx=" + String.format("%.2f", mWifiInfo.rxSuccessRate)); } messageHandlingStatus = MESSAGE_HANDLING_STATUS_REFUSED; return HANDLED; } } } WifiConfiguration currentConfiguration = getCurrentWifiConfiguration(); if (DBG) { loge("WifiStateMachine CMD_START_SCAN full=" + tryFullBandScan); } if (currentConfiguration != null) { if (fullBandConnectedTimeIntervalMilli < mWifiConfigStore.associatedPartialScanPeriodMilli) { // Sanity fullBandConnectedTimeIntervalMilli = mWifiConfigStore.associatedPartialScanPeriodMilli; } if (tryFullBandScan) { lastFullBandConnectedTimeMilli = now_ms; if (fullBandConnectedTimeIntervalMilli < mWifiConfigStore.associatedFullScanMaxIntervalMilli) { // Increase the interval fullBandConnectedTimeIntervalMilli = fullBandConnectedTimeIntervalMilli * mWifiConfigStore.associatedFullScanBackoff / 8; if (DBG) { loge("WifiStateMachine CMD_START_SCAN bump interval =" + fullBandConnectedTimeIntervalMilli); } } handleScanRequest( WifiNative.SCAN_WITHOUT_CONNECTION_SETUP, message); } else { if (!startScanForConfiguration( currentConfiguration, restrictChannelList)) { if (DBG) { loge("WifiStateMachine starting scan, " + " did not find channels -> full"); } lastFullBandConnectedTimeMilli = now_ms; if (fullBandConnectedTimeIntervalMilli < mWifiConfigStore.associatedFullScanMaxIntervalMilli) { // Increase the interval fullBandConnectedTimeIntervalMilli = fullBandConnectedTimeIntervalMilli * mWifiConfigStore.associatedFullScanBackoff / 8; if (DBG) { loge("WifiStateMachine CMD_START_SCAN bump interval =" + fullBandConnectedTimeIntervalMilli); } } handleScanRequest( WifiNative.SCAN_WITHOUT_CONNECTION_SETUP, message); } } } else { loge("CMD_START_SCAN : connected mode and no configuration"); messageHandlingStatus = MESSAGE_HANDLING_STATUS_HANDLING_ERROR; } } else { // Not scan alarm source return NOT_HANDLED; } break; /* Ignore connection to same network */ case WifiManager.CONNECT_NETWORK: int netId = message.arg1; if (mWifiInfo.getNetworkId() == netId) { break; } return NOT_HANDLED; /* Ignore */ case WifiMonitor.NETWORK_CONNECTION_EVENT: break; case CMD_RSSI_POLL: if (message.arg1 == mRssiPollToken) { if (mWifiConfigStore.enableChipWakeUpWhenAssociated) { if (VVDBG) log(" get link layer stats " + mWifiLinkLayerStatsSupported); WifiLinkLayerStats stats = getWifiLinkLayerStats(VDBG); if (stats != null) { // Sanity check the results provided by driver if (mWifiInfo.getRssi() != WifiInfo.INVALID_RSSI && (stats.rssi_mgmt == 0 || stats.beacon_rx == 0)) { stats = null; } } // Get Info and continue polling fetchRssiLinkSpeedAndFrequencyNative(); calculateWifiScore(stats); } sendMessageDelayed(obtainMessage(CMD_RSSI_POLL, mRssiPollToken, 0), POLL_RSSI_INTERVAL_MSECS); if (DBG) sendRssiChangeBroadcast(mWifiInfo.getRssi()); } else { // Polling has completed } break; case CMD_ENABLE_RSSI_POLL: if (mWifiConfigStore.enableRssiPollWhenAssociated) { mEnableRssiPolling = (message.arg1 == 1); } else { mEnableRssiPolling = false; } mRssiPollToken++; if (mEnableRssiPolling) { // First poll fetchRssiLinkSpeedAndFrequencyNative(); sendMessageDelayed(obtainMessage(CMD_RSSI_POLL, mRssiPollToken, 0), POLL_RSSI_INTERVAL_MSECS); } else { cleanWifiScore(); } break; case WifiManager.RSSI_PKTCNT_FETCH: RssiPacketCountInfo info = new RssiPacketCountInfo(); fetchRssiLinkSpeedAndFrequencyNative(); info.rssi = mWifiInfo.getRssi(); fetchPktcntNative(info); replyToMessage(message, WifiManager.RSSI_PKTCNT_FETCH_SUCCEEDED, info); break; case CMD_DELAYED_NETWORK_DISCONNECT: if (!linkDebouncing && mWifiConfigStore.enableLinkDebouncing) { // Ignore if we are not debouncing loge("CMD_DELAYED_NETWORK_DISCONNECT and not debouncing - ignore " + message.arg1); return HANDLED; } else { loge("CMD_DELAYED_NETWORK_DISCONNECT and debouncing - disconnect " + message.arg1); linkDebouncing = false; // If we are still debouncing while this message comes, // it means we were not able to reconnect within the alloted time // = LINK_FLAPPING_DEBOUNCE_MSEC // and thus, trigger a real disconnect handleNetworkDisconnect(); transitionTo(mDisconnectedState); } break; case CMD_ASSOCIATED_BSSID: if ((String) message.obj == null) { loge("Associated command w/o BSSID"); break; } mLastBssid = (String) message.obj; mWifiInfo.setBSSID((String) message.obj); break; default: return NOT_HANDLED; } return HANDLED; } } class ObtainingIpState extends State { @Override public void enter() { if (DBG) { String key = ""; if (getCurrentWifiConfiguration() != null) { key = getCurrentWifiConfiguration().configKey(); } log("enter ObtainingIpState netId=" + Integer.toString(mLastNetworkId) + " " + key + " " + " roam=" + mAutoRoaming + " static=" + mWifiConfigStore.isUsingStaticIp(mLastNetworkId) + " watchdog= " + obtainingIpWatchdogCount); } // Reset link Debouncing, indicating we have successfully re-connected to the AP // We might still be roaming linkDebouncing = false; // Send event to CM & network change broadcast setNetworkDetailedState(DetailedState.OBTAINING_IPADDR); // We must clear the config BSSID, as the wifi chipset may decide to roam // from this point on and having the BSSID specified in the network block would // cause the roam to faile and the device to disconnect clearCurrentConfigBSSID("ObtainingIpAddress"); try { mNwService.enableIpv6(mInterfaceName); } catch (RemoteException re) { loge("Failed to enable IPv6: " + re); } catch (IllegalStateException e) { loge("Failed to enable IPv6: " + e); } if (!mWifiConfigStore.isUsingStaticIp(mLastNetworkId)) { if (isRoaming()) { renewDhcp(); } else { // Remove any IP address on the interface in case we're switching from static // IP configuration to DHCP. This is safe because if we get here when not // roaming, we don't have a usable address. clearIPv4Address(mInterfaceName); startDhcp(); } obtainingIpWatchdogCount++; loge("Start Dhcp Watchdog " + obtainingIpWatchdogCount); // Get Link layer stats so as we get fresh tx packet counters getWifiLinkLayerStats(true); sendMessageDelayed(obtainMessage(CMD_OBTAINING_IP_ADDRESS_WATCHDOG_TIMER, obtainingIpWatchdogCount, 0), OBTAINING_IP_ADDRESS_GUARD_TIMER_MSEC); } else { // stop any running dhcp before assigning static IP stopDhcp(); StaticIpConfiguration config = mWifiConfigStore.getStaticIpConfiguration( mLastNetworkId); if (config.ipAddress == null) { loge("Static IP lacks address"); sendMessage(CMD_STATIC_IP_FAILURE); } else { InterfaceConfiguration ifcg = new InterfaceConfiguration(); ifcg.setLinkAddress(config.ipAddress); ifcg.setInterfaceUp(); try { mNwService.setInterfaceConfig(mInterfaceName, ifcg); if (DBG) log("Static IP configuration succeeded"); DhcpResults dhcpResults = new DhcpResults(config); sendMessage(CMD_STATIC_IP_SUCCESS, dhcpResults); } catch (RemoteException re) { loge("Static IP configuration failed: " + re); sendMessage(CMD_STATIC_IP_FAILURE); } catch (IllegalStateException e) { loge("Static IP configuration failed: " + e); sendMessage(CMD_STATIC_IP_FAILURE); } } } } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_STATIC_IP_SUCCESS: handleIPv4Success((DhcpResults) message.obj, CMD_STATIC_IP_SUCCESS); break; case CMD_STATIC_IP_FAILURE: handleIPv4Failure(CMD_STATIC_IP_FAILURE); break; case CMD_AUTO_CONNECT: case CMD_AUTO_ROAM: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; break; case WifiManager.SAVE_NETWORK: case WifiStateMachine.CMD_AUTO_SAVE_NETWORK: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DEFERRED; deferMessage(message); break; /* Defer any power mode changes since we must keep active power mode at DHCP */ case CMD_SET_HIGH_PERF_MODE: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DEFERRED; deferMessage(message); break; /* Defer scan request since we should not switch to other channels at DHCP */ case CMD_START_SCAN: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DEFERRED; deferMessage(message); break; case CMD_OBTAINING_IP_ADDRESS_WATCHDOG_TIMER: if (message.arg1 == obtainingIpWatchdogCount) { loge("ObtainingIpAddress: Watchdog Triggered, count=" + obtainingIpWatchdogCount); handleIpConfigurationLost(); transitionTo(mDisconnectingState); break; } messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; break; default: return NOT_HANDLED; } return HANDLED; } } class VerifyingLinkState extends State { @Override public void enter() { log(getName() + " enter"); setNetworkDetailedState(DetailedState.VERIFYING_POOR_LINK); mWifiConfigStore.updateStatus(mLastNetworkId, DetailedState.VERIFYING_POOR_LINK); sendNetworkStateChangeBroadcast(mLastBssid); // End roaming mAutoRoaming = WifiAutoJoinController.AUTO_JOIN_IDLE; } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case WifiWatchdogStateMachine.POOR_LINK_DETECTED: // Stay here log(getName() + " POOR_LINK_DETECTED: no transition"); break; case WifiWatchdogStateMachine.GOOD_LINK_DETECTED: log(getName() + " GOOD_LINK_DETECTED: transition to captive portal check"); log(getName() + " GOOD_LINK_DETECTED: transition to CONNECTED"); sendConnectedState(); transitionTo(mConnectedState); break; default: if (DBG) log(getName() + " what=" + message.what + " NOT_HANDLED"); return NOT_HANDLED; } return HANDLED; } } private void sendConnectedState() { // Send out a broadcast with the CAPTIVE_PORTAL_CHECK to preserve // existing behaviour. The captive portal check really happens after we // transition into DetailedState.CONNECTED. setNetworkDetailedState(DetailedState.CAPTIVE_PORTAL_CHECK); mWifiConfigStore.updateStatus(mLastNetworkId, DetailedState.CAPTIVE_PORTAL_CHECK); sendNetworkStateChangeBroadcast(mLastBssid); if (mWifiConfigStore.getLastSelectedConfiguration() != null) { if (mNetworkAgent != null) mNetworkAgent.explicitlySelected(); } setNetworkDetailedState(DetailedState.CONNECTED); mWifiConfigStore.updateStatus(mLastNetworkId, DetailedState.CONNECTED); sendNetworkStateChangeBroadcast(mLastBssid); } class RoamingState extends State { boolean mAssociated; @Override public void enter() { if (DBG) { log("RoamingState Enter" + " mScreenOn=" + mScreenOn ); } setScanAlarm(false); // Make sure we disconnect if roaming fails roamWatchdogCount++; loge("Start Roam Watchdog " + roamWatchdogCount); sendMessageDelayed(obtainMessage(CMD_ROAM_WATCHDOG_TIMER, roamWatchdogCount, 0), ROAM_GUARD_TIMER_MSEC); mAssociated = false; } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); WifiConfiguration config; switch (message.what) { case CMD_IP_CONFIGURATION_LOST: config = getCurrentWifiConfiguration(); if (config != null) { mWifiConfigStore.noteRoamingFailure(config, WifiConfiguration.ROAMING_FAILURE_IP_CONFIG); } return NOT_HANDLED; case WifiWatchdogStateMachine.POOR_LINK_DETECTED: if (DBG) log("Roaming and Watchdog reports poor link -> ignore"); return HANDLED; case CMD_UNWANTED_NETWORK: if (DBG) log("Roaming and CS doesnt want the network -> ignore"); return HANDLED; case CMD_SET_OPERATIONAL_MODE: if (message.arg1 != CONNECT_MODE) { deferMessage(message); } break; case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: /** * If we get a SUPPLICANT_STATE_CHANGE_EVENT indicating a DISCONNECT * before NETWORK_DISCONNECTION_EVENT * And there is an associated BSSID corresponding to our target BSSID, then * we have missed the network disconnection, transition to mDisconnectedState * and handle the rest of the events there. */ StateChangeResult stateChangeResult = (StateChangeResult) message.obj; if (stateChangeResult.state == SupplicantState.DISCONNECTED || stateChangeResult.state == SupplicantState.INACTIVE || stateChangeResult.state == SupplicantState.INTERFACE_DISABLED) { if (DBG) { log("STATE_CHANGE_EVENT in roaming state " + stateChangeResult.toString() ); } if (stateChangeResult.BSSID != null && stateChangeResult.BSSID.equals(mTargetRoamBSSID)) { handleNetworkDisconnect(); transitionTo(mDisconnectedState); } } if (stateChangeResult.state == SupplicantState.ASSOCIATED) { // We completed the layer2 roaming part mAssociated = true; if (stateChangeResult.BSSID != null) { mTargetRoamBSSID = (String) stateChangeResult.BSSID; } } break; case CMD_ROAM_WATCHDOG_TIMER: if (roamWatchdogCount == message.arg1) { if (DBG) log("roaming watchdog! -> disconnect"); mRoamFailCount++; handleNetworkDisconnect(); mWifiNative.disconnect(); transitionTo(mDisconnectedState); } break; case WifiMonitor.NETWORK_CONNECTION_EVENT: if (mAssociated) { if (DBG) log("roaming and Network connection established"); mLastNetworkId = message.arg1; mLastBssid = (String) message.obj; mWifiInfo.setBSSID(mLastBssid); mWifiInfo.setNetworkId(mLastNetworkId); mWifiConfigStore.handleBSSIDBlackList(mLastNetworkId, mLastBssid, true); transitionTo(mObtainingIpState); } else { messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; } break; case WifiMonitor.NETWORK_DISCONNECTION_EVENT: // Throw away but only if it corresponds to the network we're roaming to String bssid = (String)message.obj; if (true) { String target = ""; if (mTargetRoamBSSID != null) target = mTargetRoamBSSID; log("NETWORK_DISCONNECTION_EVENT in roaming state" + " BSSID=" + bssid + " target=" + target); } if (bssid != null && bssid.equals(mTargetRoamBSSID)) { handleNetworkDisconnect(); transitionTo(mDisconnectedState); } break; case WifiMonitor.SSID_TEMP_DISABLED: // Auth error while roaming loge("SSID_TEMP_DISABLED nid=" + Integer.toString(mLastNetworkId) + " id=" + Integer.toString(message.arg1) + " isRoaming=" + isRoaming() + " roam=" + Integer.toString(mAutoRoaming)); if (message.arg1 == mLastNetworkId) { config = getCurrentWifiConfiguration(); if (config != null) { mWifiConfigStore.noteRoamingFailure(config, WifiConfiguration.ROAMING_FAILURE_AUTH_FAILURE); } handleNetworkDisconnect(); transitionTo(mDisconnectingState); } return NOT_HANDLED; case CMD_START_SCAN: deferMessage(message); break; default: return NOT_HANDLED; } return HANDLED; } @Override public void exit() { loge("WifiStateMachine: Leaving Roaming state"); } } class ConnectedState extends State { @Override public void enter() { String address; updateDefaultRouteMacAddress(1000); if (DBG) { log("ConnectedState Enter " + " mScreenOn=" + mScreenOn + " scanperiod=" + Integer.toString(mWifiConfigStore.associatedPartialScanPeriodMilli) ); } if (mScreenOn && mWifiConfigStore.enableAutoJoinScanWhenAssociated) { // restart scan alarm startDelayedScan(mWifiConfigStore.associatedPartialScanPeriodMilli, null, null); } registerConnected(); lastConnectAttempt = 0; targetWificonfiguration = null; // Paranoia linkDebouncing = false; // Not roaming anymore mAutoRoaming = WifiAutoJoinController.AUTO_JOIN_IDLE; if (testNetworkDisconnect) { testNetworkDisconnectCounter++; loge("ConnectedState Enter start disconnect test " + testNetworkDisconnectCounter); sendMessageDelayed(obtainMessage(CMD_TEST_NETWORK_DISCONNECT, testNetworkDisconnectCounter, 0), 15000); } // Reenable all networks, allow for hidden networks to be scanned mWifiConfigStore.enableAllNetworks(); mLastDriverRoamAttempt = 0; } @Override public boolean processMessage(Message message) { WifiConfiguration config = null; logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case WifiWatchdogStateMachine.POOR_LINK_DETECTED: if (DBG) log("Watchdog reports poor link"); transitionTo(mVerifyingLinkState); break; case CMD_UNWANTED_NETWORK: if (message.arg1 == network_status_unwanted_disconnect) { mWifiConfigStore.handleBadNetworkDisconnectReport(mLastNetworkId, mWifiInfo); mWifiNative.disconnect(); transitionTo(mDisconnectingState); } else if (message.arg1 == network_status_unwanted_disable_autojoin) { config = getCurrentWifiConfiguration(); if (config != null) { // Disable autojoin config.numNoInternetAccessReports += 1; } } return HANDLED; case CMD_NETWORK_STATUS: if (message.arg1 == NetworkAgent.VALID_NETWORK) { config = getCurrentWifiConfiguration(); if (config != null) { // re-enable autojoin config.numNoInternetAccessReports = 0; config.validatedInternetAccess = true; } } return HANDLED; case CMD_TEST_NETWORK_DISCONNECT: // Force a disconnect if (message.arg1 == testNetworkDisconnectCounter) { mWifiNative.disconnect(); } break; case CMD_ASSOCIATED_BSSID: // ASSOCIATING to a new BSSID while already connected, indicates // that driver is roaming mLastDriverRoamAttempt = System.currentTimeMillis(); String toBSSID = (String)message.obj; if (toBSSID != null && !toBSSID.equals(mWifiInfo.getBSSID())) { mWifiConfigStore.driverRoamedFrom(mWifiInfo); } return NOT_HANDLED; case WifiMonitor.NETWORK_DISCONNECTION_EVENT: long lastRoam = 0; if (mLastDriverRoamAttempt != 0) { // Calculate time since last driver roam attempt lastRoam = System.currentTimeMillis() - mLastDriverRoamAttempt; mLastDriverRoamAttempt = 0; } config = getCurrentWifiConfiguration(); if (mScreenOn && !linkDebouncing && config != null && config.autoJoinStatus == WifiConfiguration.AUTO_JOIN_ENABLED && !mWifiConfigStore.isLastSelectedConfiguration(config) && (message.arg2 != 3 /* reason cannot be 3, i.e. locally generated */ || (lastRoam > 0 && lastRoam < 2000) /* unless driver is roaming */) && ((ScanResult.is24GHz(mWifiInfo.getFrequency()) && mWifiInfo.getRssi() > WifiConfiguration.BAD_RSSI_24) || (ScanResult.is5GHz(mWifiInfo.getFrequency()) && mWifiInfo.getRssi() > WifiConfiguration.BAD_RSSI_5))) { // Start de-bouncing the L2 disconnection: // this L2 disconnection might be spurious. // Hence we allow 7 seconds for the state machine to try // to reconnect, go thru the // roaming cycle and enter Obtaining IP address // before signalling the disconnect to ConnectivityService and L3 startScanForConfiguration(getCurrentWifiConfiguration(), false); linkDebouncing = true; sendMessageDelayed(obtainMessage(CMD_DELAYED_NETWORK_DISCONNECT, 0, mLastNetworkId), LINK_FLAPPING_DEBOUNCE_MSEC); if (DBG) { log("NETWORK_DISCONNECTION_EVENT in connected state" + " BSSID=" + mWifiInfo.getBSSID() + " RSSI=" + mWifiInfo.getRssi() + " freq=" + mWifiInfo.getFrequency() + " reason=" + message.arg2 + " -> debounce"); } return HANDLED; } else { if (DBG) { int ajst = -1; if (config != null) ajst = config.autoJoinStatus; log("NETWORK_DISCONNECTION_EVENT in connected state" + " BSSID=" + mWifiInfo.getBSSID() + " RSSI=" + mWifiInfo.getRssi() + " freq=" + mWifiInfo.getFrequency() + " was debouncing=" + linkDebouncing + " reason=" + message.arg2 + " ajst=" + ajst); } } break; case CMD_AUTO_ROAM: // Clear the driver roam indication since we are attempting a framerwork roam mLastDriverRoamAttempt = 0; /* Connect command coming from auto-join */ ScanResult candidate = (ScanResult)message.obj; String bssid = "any"; if (candidate != null && candidate.is5GHz()) { // Only lock BSSID for 5GHz networks bssid = candidate.BSSID; } int netId = mLastNetworkId; config = getCurrentWifiConfiguration(); if (config == null) { loge("AUTO_ROAM and no config, bail out..."); break; } loge("CMD_AUTO_ROAM sup state " + mSupplicantStateTracker.getSupplicantStateName() + " my state " + getCurrentState().getName() + " nid=" + Integer.toString(netId) + " config " + config.configKey() + " roam=" + Integer.toString(message.arg2) + " to " + bssid + " targetRoamBSSID " + mTargetRoamBSSID); /* Save the BSSID so as to lock it @ firmware */ if (!autoRoamSetBSSID(config, bssid) && !linkDebouncing) { loge("AUTO_ROAM nothing to do"); // Same BSSID, nothing to do messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; break; }; // Make sure the network is enabled, since supplicant will not reenable it mWifiConfigStore.enableNetworkWithoutBroadcast(netId, false); boolean ret = false; if (mLastNetworkId != netId) { if (mWifiConfigStore.selectNetwork(netId) && mWifiNative.reconnect()) { ret = true; } } else { ret = mWifiNative.reassociate(); } if (ret) { lastConnectAttempt = System.currentTimeMillis(); targetWificonfiguration = mWifiConfigStore.getWifiConfiguration(netId); // replyToMessage(message, WifiManager.CONNECT_NETWORK_SUCCEEDED); mAutoRoaming = message.arg2; transitionTo(mRoamingState); } else { loge("Failed to connect config: " + config + " netId: " + netId); replyToMessage(message, WifiManager.CONNECT_NETWORK_FAILED, WifiManager.ERROR); messageHandlingStatus = MESSAGE_HANDLING_STATUS_FAIL; break; } break; default: return NOT_HANDLED; } return HANDLED; } @Override public void exit() { loge("WifiStateMachine: Leaving Connected state"); setScanAlarm(false); mLastDriverRoamAttempt = 0; } } class DisconnectingState extends State { @Override public void enter() { if (PDBG) { loge(" Enter DisconnectingState State scan interval " + mFrameworkScanIntervalMs + " mEnableBackgroundScan= " + mEnableBackgroundScan + " screenOn=" + mScreenOn); } // Make sure we disconnect: we enter this state prior connecting to a new // network, waiting for either a DISCONECT event or a SUPPLICANT_STATE_CHANGE // event which in this case will be indicating that supplicant started to associate. // In some cases supplicant doesn't ignore the connect requests (it might not // find the target SSID in its cache), // Therefore we end up stuck that state, hence the need for the watchdog. disconnectingWatchdogCount++; loge("Start Disconnecting Watchdog " + disconnectingWatchdogCount); sendMessageDelayed(obtainMessage(CMD_DISCONNECTING_WATCHDOG_TIMER, disconnectingWatchdogCount, 0), DISCONNECTING_GUARD_TIMER_MSEC); } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case CMD_SET_OPERATIONAL_MODE: if (message.arg1 != CONNECT_MODE) { deferMessage(message); } break; case CMD_START_SCAN: deferMessage(message); return HANDLED; case CMD_DISCONNECTING_WATCHDOG_TIMER: if (disconnectingWatchdogCount == message.arg1) { if (DBG) log("disconnecting watchdog! -> disconnect"); handleNetworkDisconnect(); transitionTo(mDisconnectedState); } break; case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: /** * If we get a SUPPLICANT_STATE_CHANGE_EVENT before NETWORK_DISCONNECTION_EVENT * we have missed the network disconnection, transition to mDisconnectedState * and handle the rest of the events there */ deferMessage(message); handleNetworkDisconnect(); transitionTo(mDisconnectedState); break; default: return NOT_HANDLED; } return HANDLED; } } class DisconnectedState extends State { @Override public void enter() { // We dont scan frequently if this is a temporary disconnect // due to p2p if (mTemporarilyDisconnectWifi) { mWifiP2pChannel.sendMessage(WifiP2pServiceImpl.DISCONNECT_WIFI_RESPONSE); return; } mFrameworkScanIntervalMs = Settings.Global.getLong(mContext.getContentResolver(), Settings.Global.WIFI_FRAMEWORK_SCAN_INTERVAL_MS, mDefaultFrameworkScanIntervalMs); if (PDBG) { loge(" Enter disconnected State scan interval " + mFrameworkScanIntervalMs + " mEnableBackgroundScan= " + mEnableBackgroundScan + " screenOn=" + mScreenOn + " mFrameworkScanIntervalMs=" + mFrameworkScanIntervalMs); } /** clear the roaming state, if we were roaming, we failed */ mAutoRoaming = WifiAutoJoinController.AUTO_JOIN_IDLE; if (mScreenOn) { /** * screen lit and => delayed timer */ startDelayedScan(mDisconnectedScanPeriodMs, null, null); } else { /** * screen dark and PNO supported => scan alarm disabled */ if (mEnableBackgroundScan) { /* If a regular scan result is pending, do not initiate background * scan until the scan results are returned. This is needed because * initiating a background scan will cancel the regular scan and * scan results will not be returned until background scanning is * cleared */ if (!mIsScanOngoing) { enableBackgroundScan(true); } } else { setScanAlarm(true); } } /** * If we have no networks saved, the supplicant stops doing the periodic scan. * The scans are useful to notify the user of the presence of an open network. * Note that these are not wake up scans. */ if (!mP2pConnected.get() && mWifiConfigStore.getConfiguredNetworks().size() == 0) { sendMessageDelayed(obtainMessage(CMD_NO_NETWORKS_PERIODIC_SCAN, ++mPeriodicScanToken, 0), mSupplicantScanIntervalMs); } mDisconnectedTimeStamp = System.currentTimeMillis(); } @Override public boolean processMessage(Message message) { boolean ret = HANDLED; logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case CMD_NO_NETWORKS_PERIODIC_SCAN: if (mP2pConnected.get()) break; if (message.arg1 == mPeriodicScanToken && mWifiConfigStore.getConfiguredNetworks().size() == 0) { startScan(UNKNOWN_SCAN_SOURCE, -1, null, null); sendMessageDelayed(obtainMessage(CMD_NO_NETWORKS_PERIODIC_SCAN, ++mPeriodicScanToken, 0), mSupplicantScanIntervalMs); } break; case WifiManager.FORGET_NETWORK: case CMD_REMOVE_NETWORK: // Set up a delayed message here. After the forget/remove is handled // the handled delayed message will determine if there is a need to // scan and continue sendMessageDelayed(obtainMessage(CMD_NO_NETWORKS_PERIODIC_SCAN, ++mPeriodicScanToken, 0), mSupplicantScanIntervalMs); ret = NOT_HANDLED; break; case CMD_SET_OPERATIONAL_MODE: if (message.arg1 != CONNECT_MODE) { mOperationalMode = message.arg1; mWifiConfigStore.disableAllNetworks(); if (mOperationalMode == SCAN_ONLY_WITH_WIFI_OFF_MODE) { mWifiP2pChannel.sendMessage(CMD_DISABLE_P2P_REQ); setWifiState(WIFI_STATE_DISABLED); } transitionTo(mScanModeState); } mWifiConfigStore. setLastSelectedConfiguration(WifiConfiguration.INVALID_NETWORK_ID); break; /* Ignore network disconnect */ case WifiMonitor.NETWORK_DISCONNECTION_EVENT: break; case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: StateChangeResult stateChangeResult = (StateChangeResult) message.obj; if (DBG) { loge("SUPPLICANT_STATE_CHANGE_EVENT state=" + stateChangeResult.state + " -> state= " + WifiInfo.getDetailedStateOf(stateChangeResult.state) + " debouncing=" + linkDebouncing); } setNetworkDetailedState(WifiInfo.getDetailedStateOf(stateChangeResult.state)); /* ConnectModeState does the rest of the handling */ ret = NOT_HANDLED; break; case CMD_START_SCAN: if (!checkOrDeferScanAllowed(message)) { // The scan request was rescheduled messageHandlingStatus = MESSAGE_HANDLING_STATUS_REFUSED; return HANDLED; } /* Disable background scan temporarily during a regular scan */ if (mEnableBackgroundScan) { enableBackgroundScan(false); } if (message.arg1 == SCAN_ALARM_SOURCE) { // Check if the CMD_START_SCAN message is obsolete (and thus if it should // not be processed) and restart the scan int period = mDisconnectedScanPeriodMs; if (mP2pConnected.get()) { period = (int)Settings.Global.getLong(mContext.getContentResolver(), Settings.Global.WIFI_SCAN_INTERVAL_WHEN_P2P_CONNECTED_MS, mDisconnectedScanPeriodMs); } if (!checkAndRestartDelayedScan(message.arg2, true, period, null, null)) { messageHandlingStatus = MESSAGE_HANDLING_STATUS_OBSOLETE; loge("WifiStateMachine Disconnected CMD_START_SCAN source " + message.arg1 + " " + message.arg2 + ", " + mDelayedScanCounter + " -> obsolete"); return HANDLED; } handleScanRequest(WifiNative.SCAN_WITHOUT_CONNECTION_SETUP, message); ret = HANDLED; } else { ret = NOT_HANDLED; } break; case WifiMonitor.SCAN_RESULTS_EVENT: /* Re-enable background scan when a pending scan result is received */ if (mEnableBackgroundScan && mIsScanOngoing) { enableBackgroundScan(true); } /* Handled in parent state */ ret = NOT_HANDLED; break; case WifiP2pServiceImpl.P2P_CONNECTION_CHANGED: NetworkInfo info = (NetworkInfo) message.obj; mP2pConnected.set(info.isConnected()); if (mP2pConnected.get()) { int defaultInterval = mContext.getResources().getInteger( R.integer.config_wifi_scan_interval_p2p_connected); long scanIntervalMs = Settings.Global.getLong(mContext.getContentResolver(), Settings.Global.WIFI_SCAN_INTERVAL_WHEN_P2P_CONNECTED_MS, defaultInterval); mWifiNative.setScanInterval((int) scanIntervalMs/1000); } else if (mWifiConfigStore.getConfiguredNetworks().size() == 0) { if (DBG) log("Turn on scanning after p2p disconnected"); sendMessageDelayed(obtainMessage(CMD_NO_NETWORKS_PERIODIC_SCAN, ++mPeriodicScanToken, 0), mSupplicantScanIntervalMs); } else { // If P2P is not connected and there are saved networks, then restart // scanning at the normal period. This is necessary because scanning might // have been disabled altogether if WIFI_SCAN_INTERVAL_WHEN_P2P_CONNECTED_MS // was set to zero. startDelayedScan(mDisconnectedScanPeriodMs, null, null); } case CMD_RECONNECT: case CMD_REASSOCIATE: if (mTemporarilyDisconnectWifi) { // Drop a third party reconnect/reassociate if STA is // temporarily disconnected for p2p break; } else { // ConnectModeState handles it ret = NOT_HANDLED; } break; case CMD_SCREEN_STATE_CHANGED: handleScreenStateChanged(message.arg1 != 0, /* startBackgroundScanIfNeeded = */ true); break; default: ret = NOT_HANDLED; } return ret; } @Override public void exit() { /* No need for a background scan upon exit from a disconnected state */ if (mEnableBackgroundScan) { enableBackgroundScan(false); } setScanAlarm(false); } } class WpsRunningState extends State { // Tracks the source to provide a reply private Message mSourceMessage; @Override public void enter() { mSourceMessage = Message.obtain(getCurrentMessage()); } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch (message.what) { case WifiMonitor.WPS_SUCCESS_EVENT: // Ignore intermediate success, wait for full connection break; case WifiMonitor.NETWORK_CONNECTION_EVENT: replyToMessage(mSourceMessage, WifiManager.WPS_COMPLETED); mSourceMessage.recycle(); mSourceMessage = null; deferMessage(message); transitionTo(mDisconnectedState); break; case WifiMonitor.WPS_OVERLAP_EVENT: replyToMessage(mSourceMessage, WifiManager.WPS_FAILED, WifiManager.WPS_OVERLAP_ERROR); mSourceMessage.recycle(); mSourceMessage = null; transitionTo(mDisconnectedState); break; case WifiMonitor.WPS_FAIL_EVENT: // Arg1 has the reason for the failure if ((message.arg1 != WifiManager.ERROR) || (message.arg2 != 0)) { replyToMessage(mSourceMessage, WifiManager.WPS_FAILED, message.arg1); mSourceMessage.recycle(); mSourceMessage = null; transitionTo(mDisconnectedState); } else { if (DBG) log("Ignore unspecified fail event during WPS connection"); } break; case WifiMonitor.WPS_TIMEOUT_EVENT: replyToMessage(mSourceMessage, WifiManager.WPS_FAILED, WifiManager.WPS_TIMED_OUT); mSourceMessage.recycle(); mSourceMessage = null; transitionTo(mDisconnectedState); break; case WifiManager.START_WPS: replyToMessage(message, WifiManager.WPS_FAILED, WifiManager.IN_PROGRESS); break; case WifiManager.CANCEL_WPS: if (mWifiNative.cancelWps()) { replyToMessage(message, WifiManager.CANCEL_WPS_SUCCEDED); } else { replyToMessage(message, WifiManager.CANCEL_WPS_FAILED, WifiManager.ERROR); } transitionTo(mDisconnectedState); break; /** * Defer all commands that can cause connections to a different network * or put the state machine out of connect mode */ case CMD_STOP_DRIVER: case CMD_SET_OPERATIONAL_MODE: case WifiManager.CONNECT_NETWORK: case CMD_ENABLE_NETWORK: case CMD_RECONNECT: case CMD_REASSOCIATE: deferMessage(message); break; case CMD_AUTO_CONNECT: case CMD_AUTO_ROAM: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; return HANDLED; case CMD_START_SCAN: messageHandlingStatus = MESSAGE_HANDLING_STATUS_DISCARD; return HANDLED; case WifiMonitor.NETWORK_DISCONNECTION_EVENT: if (DBG) log("Network connection lost"); handleNetworkDisconnect(); break; case WifiMonitor.ASSOCIATION_REJECTION_EVENT: if (DBG) log("Ignore Assoc reject event during WPS Connection"); break; case WifiMonitor.AUTHENTICATION_FAILURE_EVENT: // Disregard auth failure events during WPS connection. The // EAP sequence is retried several times, and there might be // failures (especially for wps pin). We will get a WPS_XXX // event at the end of the sequence anyway. if (DBG) log("Ignore auth failure during WPS connection"); break; case WifiMonitor.SUPPLICANT_STATE_CHANGE_EVENT: // Throw away supplicant state changes when WPS is running. // We will start getting supplicant state changes once we get // a WPS success or failure break; default: return NOT_HANDLED; } return HANDLED; } @Override public void exit() { mWifiConfigStore.enableAllNetworks(); mWifiConfigStore.loadConfiguredNetworks(); } } class SoftApStartingState extends State { @Override public void enter() { final Message message = getCurrentMessage(); if (message.what == CMD_START_AP) { final WifiConfiguration config = (WifiConfiguration) message.obj; if (config == null) { mWifiApConfigChannel.sendMessage(CMD_REQUEST_AP_CONFIG); } else { mWifiApConfigChannel.sendMessage(CMD_SET_AP_CONFIG, config); startSoftApWithConfig(config); } } else { throw new RuntimeException("Illegal transition to SoftApStartingState: " + message); } } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_START_SUPPLICANT: case CMD_STOP_SUPPLICANT: case CMD_START_AP: case CMD_STOP_AP: case CMD_START_DRIVER: case CMD_STOP_DRIVER: case CMD_SET_OPERATIONAL_MODE: case CMD_SET_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_START_PACKET_FILTERING: case CMD_STOP_PACKET_FILTERING: case CMD_TETHER_STATE_CHANGE: deferMessage(message); break; case WifiStateMachine.CMD_RESPONSE_AP_CONFIG: WifiConfiguration config = (WifiConfiguration) message.obj; if (config != null) { startSoftApWithConfig(config); } else { loge("Softap config is null!"); sendMessage(CMD_START_AP_FAILURE); } break; case CMD_START_AP_SUCCESS: setWifiApState(WIFI_AP_STATE_ENABLED); transitionTo(mSoftApStartedState); break; case CMD_START_AP_FAILURE: setWifiApState(WIFI_AP_STATE_FAILED); transitionTo(mInitialState); break; default: return NOT_HANDLED; } return HANDLED; } } class SoftApStartedState extends State { @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_STOP_AP: if (DBG) log("Stopping Soft AP"); /* We have not tethered at this point, so we just shutdown soft Ap */ try { mNwService.stopAccessPoint(mInterfaceName); } catch(Exception e) { loge("Exception in stopAccessPoint()"); } setWifiApState(WIFI_AP_STATE_DISABLED); transitionTo(mInitialState); break; case CMD_START_AP: // Ignore a start on a running access point break; // Fail client mode operation when soft AP is enabled case CMD_START_SUPPLICANT: loge("Cannot start supplicant with a running soft AP"); setWifiState(WIFI_STATE_UNKNOWN); break; case CMD_TETHER_STATE_CHANGE: TetherStateChange stateChange = (TetherStateChange) message.obj; if (startTethering(stateChange.available)) { transitionTo(mTetheringState); } break; default: return NOT_HANDLED; } return HANDLED; } } class TetheringState extends State { @Override public void enter() { /* Send ourselves a delayed message to shut down if tethering fails to notify */ sendMessageDelayed(obtainMessage(CMD_TETHER_NOTIFICATION_TIMED_OUT, ++mTetherToken, 0), TETHER_NOTIFICATION_TIME_OUT_MSECS); } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_TETHER_STATE_CHANGE: TetherStateChange stateChange = (TetherStateChange) message.obj; if (isWifiTethered(stateChange.active)) { transitionTo(mTetheredState); } return HANDLED; case CMD_TETHER_NOTIFICATION_TIMED_OUT: if (message.arg1 == mTetherToken) { loge("Failed to get tether update, shutdown soft access point"); transitionTo(mSoftApStartedState); // Needs to be first thing handled sendMessageAtFrontOfQueue(CMD_STOP_AP); } break; case CMD_START_SUPPLICANT: case CMD_STOP_SUPPLICANT: case CMD_START_AP: case CMD_STOP_AP: case CMD_START_DRIVER: case CMD_STOP_DRIVER: case CMD_SET_OPERATIONAL_MODE: case CMD_SET_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_START_PACKET_FILTERING: case CMD_STOP_PACKET_FILTERING: deferMessage(message); break; default: return NOT_HANDLED; } return HANDLED; } } class TetheredState extends State { @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_TETHER_STATE_CHANGE: TetherStateChange stateChange = (TetherStateChange) message.obj; if (!isWifiTethered(stateChange.active)) { loge("Tethering reports wifi as untethered!, shut down soft Ap"); setHostApRunning(null, false); setHostApRunning(null, true); } return HANDLED; case CMD_STOP_AP: if (DBG) log("Untethering before stopping AP"); setWifiApState(WIFI_AP_STATE_DISABLING); stopTethering(); transitionTo(mUntetheringState); // More work to do after untethering deferMessage(message); break; default: return NOT_HANDLED; } return HANDLED; } } class UntetheringState extends State { @Override public void enter() { /* Send ourselves a delayed message to shut down if tethering fails to notify */ sendMessageDelayed(obtainMessage(CMD_TETHER_NOTIFICATION_TIMED_OUT, ++mTetherToken, 0), TETHER_NOTIFICATION_TIME_OUT_MSECS); } @Override public boolean processMessage(Message message) { logStateAndMessage(message, getClass().getSimpleName()); switch(message.what) { case CMD_TETHER_STATE_CHANGE: TetherStateChange stateChange = (TetherStateChange) message.obj; /* Wait till wifi is untethered */ if (isWifiTethered(stateChange.active)) break; transitionTo(mSoftApStartedState); break; case CMD_TETHER_NOTIFICATION_TIMED_OUT: if (message.arg1 == mTetherToken) { loge("Failed to get tether update, force stop access point"); transitionTo(mSoftApStartedState); } break; case CMD_START_SUPPLICANT: case CMD_STOP_SUPPLICANT: case CMD_START_AP: case CMD_STOP_AP: case CMD_START_DRIVER: case CMD_STOP_DRIVER: case CMD_SET_OPERATIONAL_MODE: case CMD_SET_COUNTRY_CODE: case CMD_SET_FREQUENCY_BAND: case CMD_START_PACKET_FILTERING: case CMD_STOP_PACKET_FILTERING: deferMessage(message); break; default: return NOT_HANDLED; } return HANDLED; } } //State machine initiated requests can have replyTo set to null indicating //there are no recepients, we ignore those reply actions private void replyToMessage(Message msg, int what) { if (msg.replyTo == null) return; Message dstMsg = obtainMessageWithArg2(msg); dstMsg.what = what; mReplyChannel.replyToMessage(msg, dstMsg); } private void replyToMessage(Message msg, int what, int arg1) { if (msg.replyTo == null) return; Message dstMsg = obtainMessageWithArg2(msg); dstMsg.what = what; dstMsg.arg1 = arg1; mReplyChannel.replyToMessage(msg, dstMsg); } private void replyToMessage(Message msg, int what, Object obj) { if (msg.replyTo == null) return; Message dstMsg = obtainMessageWithArg2(msg); dstMsg.what = what; dstMsg.obj = obj; mReplyChannel.replyToMessage(msg, dstMsg); } /** * arg2 on the source message has a unique id that needs to be retained in replies * to match the request * see WifiManager for details */ private Message obtainMessageWithArg2(Message srcMsg) { Message msg = Message.obtain(); msg.arg2 = srcMsg.arg2; return msg; } private static int parseHex(char ch) { if ('0' <= ch && ch <= '9') { return ch - '0'; } else if ('a' <= ch && ch <= 'f') { return ch - 'a' + 10; } else if ('A' <= ch && ch <= 'F') { return ch - 'A' + 10; } else { throw new NumberFormatException("" + ch + " is not a valid hex digit"); } } private byte[] parseHex(String hex) { /* This only works for good input; don't throw bad data at it */ if (hex == null) { return new byte[0]; } if (hex.length() % 2 != 0) { throw new NumberFormatException(hex + " is not a valid hex string"); } byte[] result = new byte[(hex.length())/2 + 1]; result[0] = (byte) ((hex.length())/2); for (int i = 0, j = 1; i < hex.length(); i += 2, j++) { int val = parseHex(hex.charAt(i)) * 16 + parseHex(hex.charAt(i+1)); byte b = (byte) (val & 0xFF); result[j] = b; } return result; } private static String makeHex(byte[] bytes) { StringBuilder sb = new StringBuilder(); for (byte b : bytes) { sb.append(String.format("%02x", b)); } return sb.toString(); } private static String makeHex(byte[] bytes, int from, int len) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < len; i++) { sb.append(String.format("%02x", bytes[from+i])); } return sb.toString(); } private static byte[] concat(byte[] array1, byte[] array2, byte[] array3) { int len = array1.length + array2.length + array3.length; if (array1.length != 0) { len++; /* add another byte for size */ } if (array2.length != 0) { len++; /* add another byte for size */ } if (array3.length != 0) { len++; /* add another byte for size */ } byte[] result = new byte[len]; int index = 0; if (array1.length != 0) { result[index] = (byte) (array1.length & 0xFF); index++; for (byte b : array1) { result[index] = b; index++; } } if (array2.length != 0) { result[index] = (byte) (array2.length & 0xFF); index++; for (byte b : array2) { result[index] = b; index++; } } if (array3.length != 0) { result[index] = (byte) (array3.length & 0xFF); index++; for (byte b : array3) { result[index] = b; index++; } } return result; } void handleGsmAuthRequest(SimAuthRequestData requestData) { if (targetWificonfiguration == null || targetWificonfiguration.networkId == requestData.networkId) { logd("id matches targetWifiConfiguration"); } else { logd("id does not match targetWifiConfiguration"); return; } TelephonyManager tm = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); if (tm != null) { StringBuilder sb = new StringBuilder(); for (String challenge : requestData.challenges) { logd("RAND = " + challenge); byte[] rand = null; try { rand = parseHex(challenge); } catch (NumberFormatException e) { loge("malformed challenge"); continue; } String base64Challenge = android.util.Base64.encodeToString( rand, android.util.Base64.NO_WRAP); /* * appType = 1 => SIM, 2 => USIM according to * com.android.internal.telephony.PhoneConstants#APPTYPE_xxx */ int appType = 2; String tmResponse = tm.getIccSimChallengeResponse(appType, base64Challenge); logv("Raw Response - " + tmResponse); if (tmResponse != null && tmResponse.length() > 4) { byte[] result = android.util.Base64.decode(tmResponse, android.util.Base64.DEFAULT); logv("Hex Response -" + makeHex(result)); int sres_len = result[0]; String sres = makeHex(result, 1, sres_len); int kc_offset = 1+sres_len; int kc_len = result[kc_offset]; String kc = makeHex(result, 1+kc_offset, kc_len); sb.append(":" + kc + ":" + sres); logv("kc:" + kc + " sres:" + sres); } else { loge("bad response - " + tmResponse); } } String response = sb.toString(); logv("Supplicant Response -" + response); mWifiNative.simAuthResponse(requestData.networkId, response); } else { loge("could not get telephony manager"); } } void handle3GAuthRequest(SimAuthRequestData requestData) { } }