/* * 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.nfc; import android.app.ActivityManager; import android.app.Application; import android.app.KeyguardManager; import android.app.PendingIntent; import android.app.admin.DevicePolicyManager; import android.content.BroadcastReceiver; import android.content.ComponentName; import android.content.ContentResolver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.content.pm.IPackageManager; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.content.pm.UserInfo; import android.content.res.Resources.NotFoundException; import android.media.AudioManager; import android.media.SoundPool; import android.nfc.BeamShareData; import android.nfc.ErrorCodes; import android.nfc.FormatException; import android.nfc.IAppCallback; import android.nfc.INfcAdapter; import android.nfc.INfcAdapterExtras; import android.nfc.INfcCardEmulation; import android.nfc.INfcFCardEmulation; import android.nfc.INfcTag; import android.nfc.INfcUnlockHandler; import android.nfc.ITagRemovedCallback; import android.nfc.NdefMessage; import android.nfc.NfcAdapter; import android.nfc.Tag; import android.nfc.TechListParcel; import android.nfc.TransceiveResult; import android.nfc.tech.Ndef; import android.nfc.tech.TagTechnology; import android.os.AsyncTask; import android.os.Binder; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.PowerManager; import android.os.Process; import android.os.RemoteException; import android.os.ServiceManager; import android.os.SystemClock; import android.os.UserHandle; import android.os.UserManager; import android.provider.Settings; import android.util.Log; import com.android.internal.logging.MetricsLogger; import com.android.nfc.DeviceHost.DeviceHostListener; import com.android.nfc.DeviceHost.LlcpConnectionlessSocket; import com.android.nfc.DeviceHost.LlcpServerSocket; import com.android.nfc.DeviceHost.LlcpSocket; import com.android.nfc.DeviceHost.NfcDepEndpoint; import com.android.nfc.DeviceHost.TagEndpoint; import com.android.nfc.cardemulation.CardEmulationManager; import com.android.nfc.dhimpl.NativeNfcManager; import com.android.nfc.handover.HandoverDataParser; import java.io.FileDescriptor; import java.io.PrintWriter; import java.nio.ByteBuffer; import java.util.concurrent.atomic.AtomicInteger; import java.util.Arrays; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.NoSuchElementException; public class NfcService implements DeviceHostListener { static final boolean DBG = false; static final String TAG = "NfcService"; public static final String SERVICE_NAME = "nfc"; public static final String PREF = "NfcServicePrefs"; static final String PREF_NFC_ON = "nfc_on"; static final boolean NFC_ON_DEFAULT = true; static final String PREF_NDEF_PUSH_ON = "ndef_push_on"; static final boolean NDEF_PUSH_ON_DEFAULT = true; static final String PREF_FIRST_BEAM = "first_beam"; static final String PREF_FIRST_BOOT = "first_boot"; static final String TRON_NFC_CE = "nfc_ce"; static final String TRON_NFC_P2P = "nfc_p2p"; static final String TRON_NFC_TAG = "nfc_tag"; static final int MSG_NDEF_TAG = 0; static final int MSG_LLCP_LINK_ACTIVATION = 1; static final int MSG_LLCP_LINK_DEACTIVATED = 2; static final int MSG_MOCK_NDEF = 3; static final int MSG_LLCP_LINK_FIRST_PACKET = 4; static final int MSG_ROUTE_AID = 5; static final int MSG_UNROUTE_AID = 6; static final int MSG_COMMIT_ROUTING = 7; static final int MSG_INVOKE_BEAM = 8; static final int MSG_RF_FIELD_ACTIVATED = 9; static final int MSG_RF_FIELD_DEACTIVATED = 10; static final int MSG_RESUME_POLLING = 11; static final int MSG_REGISTER_T3T_IDENTIFIER = 12; static final int MSG_DEREGISTER_T3T_IDENTIFIER = 13; static final int MSG_TAG_DEBOUNCE = 14; static final int MSG_UPDATE_STATS = 15; // Update stats every 4 hours static final long STATS_UPDATE_INTERVAL_MS = 4 * 60 * 60 * 1000; static final long MAX_POLLING_PAUSE_TIMEOUT = 40000; static final int TASK_ENABLE = 1; static final int TASK_DISABLE = 2; static final int TASK_BOOT = 3; // Polling technology masks static final int NFC_POLL_A = 0x01; static final int NFC_POLL_B = 0x02; static final int NFC_POLL_F = 0x04; static final int NFC_POLL_ISO15693 = 0x08; static final int NFC_POLL_B_PRIME = 0x10; static final int NFC_POLL_KOVIO = 0x20; // minimum screen state that enables NFC polling static final int NFC_POLLING_MODE = ScreenStateHelper.SCREEN_STATE_ON_UNLOCKED; // Time to wait for NFC controller to initialize before watchdog // goes off. This time is chosen large, because firmware download // may be a part of initialization. static final int INIT_WATCHDOG_MS = 90000; // Time to wait for routing to be applied before watchdog // goes off static final int ROUTING_WATCHDOG_MS = 10000; // Default delay used for presence checks static final int DEFAULT_PRESENCE_CHECK_DELAY = 125; // The amount of time we wait before manually launching // the Beam animation when called through the share menu. static final int INVOKE_BEAM_DELAY_MS = 1000; // RF field events as defined in NFC extras public static final String ACTION_RF_FIELD_ON_DETECTED = "com.android.nfc_extras.action.RF_FIELD_ON_DETECTED"; public static final String ACTION_RF_FIELD_OFF_DETECTED = "com.android.nfc_extras.action.RF_FIELD_OFF_DETECTED"; // for use with playSound() public static final int SOUND_START = 0; public static final int SOUND_END = 1; public static final int SOUND_ERROR = 2; public static final String ACTION_LLCP_UP = "com.android.nfc.action.LLCP_UP"; public static final String ACTION_LLCP_DOWN = "com.android.nfc.action.LLCP_DOWN"; // Timeout to re-apply routing if a tag was present and we postponed it private static final int APPLY_ROUTING_RETRY_TIMEOUT_MS = 5000; private final UserManager mUserManager; // NFC Execution Environment // fields below are protected by this private final ReaderModeDeathRecipient mReaderModeDeathRecipient = new ReaderModeDeathRecipient(); private final NfcUnlockManager mNfcUnlockManager; private final NfceeAccessControl mNfceeAccessControl; List mInstalledPackages; // cached version of installed packages // fields below are used in multiple threads and protected by synchronized(this) final HashMap mObjectMap = new HashMap(); int mScreenState; boolean mInProvisionMode; // whether we're in setup wizard and enabled NFC provisioning boolean mIsNdefPushEnabled; NfcDiscoveryParameters mCurrentDiscoveryParameters = NfcDiscoveryParameters.getNfcOffParameters(); ReaderModeParams mReaderModeParams; private int mUserId; boolean mPollingPaused; byte mDebounceTagUid[]; int mDebounceTagDebounceMs; ITagRemovedCallback mDebounceTagRemovedCallback; // Only accessed on one thread so doesn't need locking NdefMessage mLastReadNdefMessage; // Metrics AtomicInteger mNumTagsDetected; AtomicInteger mNumP2pDetected; AtomicInteger mNumHceDetected; // mState is protected by this, however it is only modified in onCreate() // and the default AsyncTask thread so it is read unprotected from that // thread int mState; // one of NfcAdapter.STATE_ON, STATE_TURNING_ON, etc // fields below are final after onCreate() Context mContext; private DeviceHost mDeviceHost; private SharedPreferences mPrefs; private SharedPreferences.Editor mPrefsEditor; private PowerManager.WakeLock mRoutingWakeLock; int mStartSound; int mEndSound; int mErrorSound; SoundPool mSoundPool; // playback synchronized on this P2pLinkManager mP2pLinkManager; TagService mNfcTagService; NfcAdapterService mNfcAdapter; boolean mIsDebugBuild; boolean mIsHceCapable; boolean mIsHceFCapable; private NfcDispatcher mNfcDispatcher; private PowerManager mPowerManager; private KeyguardManager mKeyguard; private HandoverDataParser mHandoverDataParser; private ContentResolver mContentResolver; private CardEmulationManager mCardEmulationManager; private ScreenStateHelper mScreenStateHelper; private ForegroundUtils mForegroundUtils; private static NfcService sService; boolean mIsLiveCaseEnabled; // whether live cases are enabled int mLiveCaseTechnology; // Technology mask of accepted NFC tags public static NfcService getInstance() { return sService; } @Override public void onRemoteEndpointDiscovered(TagEndpoint tag) { sendMessage(NfcService.MSG_NDEF_TAG, tag); } /** * Notifies transaction */ @Override public void onHostCardEmulationActivated(int technology) { if (mCardEmulationManager != null) { mCardEmulationManager.onHostCardEmulationActivated(technology); } } @Override public void onHostCardEmulationData(int technology, byte[] data) { if (mCardEmulationManager != null) { mCardEmulationManager.onHostCardEmulationData(technology, data); } } @Override public void onHostCardEmulationDeactivated(int technology) { if (mCardEmulationManager != null) { // Do metrics here so we don't slow the CE path down mNumHceDetected.incrementAndGet(); mCardEmulationManager.onHostCardEmulationDeactivated(technology); } } /** * Notifies P2P Device detected, to activate LLCP link */ @Override public void onLlcpLinkActivated(NfcDepEndpoint device) { sendMessage(NfcService.MSG_LLCP_LINK_ACTIVATION, device); } /** * Notifies P2P Device detected, to activate LLCP link */ @Override public void onLlcpLinkDeactivated(NfcDepEndpoint device) { sendMessage(NfcService.MSG_LLCP_LINK_DEACTIVATED, device); } /** * Notifies P2P Device detected, first packet received over LLCP link */ @Override public void onLlcpFirstPacketReceived(NfcDepEndpoint device) { mNumP2pDetected.incrementAndGet(); sendMessage(NfcService.MSG_LLCP_LINK_FIRST_PACKET, device); } @Override public void onRemoteFieldActivated() { sendMessage(NfcService.MSG_RF_FIELD_ACTIVATED, null); } @Override public void onRemoteFieldDeactivated() { sendMessage(NfcService.MSG_RF_FIELD_DEACTIVATED, null); } final class ReaderModeParams { public int flags; public IAppCallback callback; public int presenceCheckDelay; } public NfcService(Application nfcApplication) { mUserId = ActivityManager.getCurrentUser(); mContext = nfcApplication; mNfcTagService = new TagService(); mNfcAdapter = new NfcAdapterService(); Log.i(TAG, "Starting NFC service"); sService = this; mScreenStateHelper = new ScreenStateHelper(mContext); mContentResolver = mContext.getContentResolver(); mDeviceHost = new NativeNfcManager(mContext, this); mNfcUnlockManager = NfcUnlockManager.getInstance(); mHandoverDataParser = new HandoverDataParser(); boolean isNfcProvisioningEnabled = false; try { isNfcProvisioningEnabled = mContext.getResources().getBoolean( R.bool.enable_nfc_provisioning); } catch (NotFoundException e) { } try { mIsLiveCaseEnabled = mContext.getResources().getBoolean(R.bool.enable_live_cases); } catch (NotFoundException e) { mIsLiveCaseEnabled = false; } mLiveCaseTechnology = 0; String[] liveCaseTechList; try { liveCaseTechList = mContext.getResources().getStringArray(R.array.live_case_tag_types); for (int i=0; i < liveCaseTechList.length; i++) { if (liveCaseTechList[i].equals("TypeA")) { mLiveCaseTechnology |= NFC_POLL_A; } else if (liveCaseTechList[i].equals("TypeB")) { mLiveCaseTechnology |= NFC_POLL_B; } else if (liveCaseTechList[i].equals("TypeF")) { mLiveCaseTechnology |= NFC_POLL_F; } else if (liveCaseTechList[i].equals("TypeV")) { mLiveCaseTechnology |= NFC_POLL_ISO15693; } } } catch (NotFoundException e) { mLiveCaseTechnology = 0; } if (isNfcProvisioningEnabled) { mInProvisionMode = Settings.Secure.getInt(mContentResolver, Settings.Global.DEVICE_PROVISIONED, 0) == 0; } else { mInProvisionMode = false; } mNfcDispatcher = new NfcDispatcher(mContext, mHandoverDataParser, mInProvisionMode); mP2pLinkManager = new P2pLinkManager(mContext, mHandoverDataParser, mDeviceHost.getDefaultLlcpMiu(), mDeviceHost.getDefaultLlcpRwSize()); mPrefs = mContext.getSharedPreferences(PREF, Context.MODE_PRIVATE); mPrefsEditor = mPrefs.edit(); mNfceeAccessControl = new NfceeAccessControl(mContext); mState = NfcAdapter.STATE_OFF; mIsNdefPushEnabled = mPrefs.getBoolean(PREF_NDEF_PUSH_ON, NDEF_PUSH_ON_DEFAULT); setBeamShareActivityState(mIsNdefPushEnabled); mIsDebugBuild = "userdebug".equals(Build.TYPE) || "eng".equals(Build.TYPE); mPowerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE); mRoutingWakeLock = mPowerManager.newWakeLock( PowerManager.PARTIAL_WAKE_LOCK, "NfcService:mRoutingWakeLock"); mKeyguard = (KeyguardManager) mContext.getSystemService(Context.KEYGUARD_SERVICE); mUserManager = (UserManager) mContext.getSystemService(Context.USER_SERVICE); mScreenState = mScreenStateHelper.checkScreenState(); mNumTagsDetected = new AtomicInteger(); mNumP2pDetected = new AtomicInteger(); mNumHceDetected = new AtomicInteger(); // Intents for all users IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF); filter.addAction(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_USER_PRESENT); filter.addAction(Intent.ACTION_USER_SWITCHED); mContext.registerReceiverAsUser(mReceiver, UserHandle.ALL, filter, null, null); IntentFilter ownerFilter = new IntentFilter(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE); ownerFilter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE); mContext.registerReceiver(mOwnerReceiver, ownerFilter); ownerFilter = new IntentFilter(); ownerFilter.addAction(Intent.ACTION_PACKAGE_ADDED); ownerFilter.addAction(Intent.ACTION_PACKAGE_REMOVED); ownerFilter.addDataScheme("package"); mContext.registerReceiver(mOwnerReceiver, ownerFilter); IntentFilter policyFilter = new IntentFilter(DevicePolicyManager.ACTION_DEVICE_POLICY_MANAGER_STATE_CHANGED); mContext.registerReceiverAsUser(mPolicyReceiver, UserHandle.ALL, policyFilter, null, null); updatePackageCache(); PackageManager pm = mContext.getPackageManager(); mIsHceCapable = pm.hasSystemFeature(PackageManager.FEATURE_NFC_HOST_CARD_EMULATION) || pm.hasSystemFeature(PackageManager.FEATURE_NFC_HOST_CARD_EMULATION_NFCF); mIsHceFCapable = pm.hasSystemFeature(PackageManager.FEATURE_NFC_HOST_CARD_EMULATION_NFCF); if (mIsHceCapable) { mCardEmulationManager = new CardEmulationManager(mContext); } mForegroundUtils = ForegroundUtils.getInstance(); // Make sure this is only called when object construction is complete. ServiceManager.addService(SERVICE_NAME, mNfcAdapter); new EnableDisableTask().execute(TASK_BOOT); // do blocking boot tasks mHandler.sendEmptyMessageDelayed(MSG_UPDATE_STATS, STATS_UPDATE_INTERVAL_MS); } void initSoundPool() { synchronized (this) { if (mSoundPool == null) { mSoundPool = new SoundPool(1, AudioManager.STREAM_NOTIFICATION, 0); mStartSound = mSoundPool.load(mContext, R.raw.start, 1); mEndSound = mSoundPool.load(mContext, R.raw.end, 1); mErrorSound = mSoundPool.load(mContext, R.raw.error, 1); } } } void releaseSoundPool() { synchronized (this) { if (mSoundPool != null) { mSoundPool.release(); mSoundPool = null; } } } void updatePackageCache() { PackageManager pm = mContext.getPackageManager(); List packages = pm.getInstalledPackagesAsUser(0, UserHandle.USER_SYSTEM); synchronized (this) { mInstalledPackages = packages; } } /** * Manages tasks that involve turning on/off the NFC controller. *

*

All work that might turn the NFC adapter on or off must be done * through this task, to keep the handling of mState simple. * In other words, mState is only modified in these tasks (and we * don't need a lock to read it in these tasks). *

*

These tasks are all done on the same AsyncTask background * thread, so they are serialized. Each task may temporarily transition * mState to STATE_TURNING_OFF or STATE_TURNING_ON, but must exit in * either STATE_ON or STATE_OFF. This way each task can be guaranteed * of starting in either STATE_OFF or STATE_ON, without needing to hold * NfcService.this for the entire task. *

*

AsyncTask's are also implicitly queued. This is useful for corner * cases like turning airplane mode on while TASK_ENABLE is in progress. * The TASK_DISABLE triggered by airplane mode will be correctly executed * immediately after TASK_ENABLE is complete. This seems like the most sane * way to deal with these situations. *

*

{@link #TASK_ENABLE} enables the NFC adapter, without changing * preferences *

{@link #TASK_DISABLE} disables the NFC adapter, without changing * preferences *

{@link #TASK_BOOT} does first boot work and may enable NFC */ class EnableDisableTask extends AsyncTask { @Override protected Void doInBackground(Integer... params) { // Sanity check mState switch (mState) { case NfcAdapter.STATE_TURNING_OFF: case NfcAdapter.STATE_TURNING_ON: Log.e(TAG, "Processing EnableDisable task " + params[0] + " from bad state " + mState); return null; } /* AsyncTask sets this thread to THREAD_PRIORITY_BACKGROUND, * override with the default. THREAD_PRIORITY_BACKGROUND causes * us to service software I2C too slow for firmware download * with the NXP PN544. * TODO: move this to the DAL I2C layer in libnfc-nxp, since this * problem only occurs on I2C platforms using PN544 */ Process.setThreadPriority(Process.THREAD_PRIORITY_DEFAULT); switch (params[0].intValue()) { case TASK_ENABLE: enableInternal(); break; case TASK_DISABLE: disableInternal(); break; case TASK_BOOT: Log.d(TAG, "checking on firmware download"); if (mPrefs.getBoolean(PREF_NFC_ON, NFC_ON_DEFAULT)) { Log.d(TAG, "NFC is on. Doing normal stuff"); enableInternal(); } else { Log.d(TAG, "NFC is off. Checking firmware version"); mDeviceHost.checkFirmware(); } if (mPrefs.getBoolean(PREF_FIRST_BOOT, true)) { Log.i(TAG, "First Boot"); mPrefsEditor.putBoolean(PREF_FIRST_BOOT, false); mPrefsEditor.apply(); } break; } // Restore default AsyncTask priority Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); return null; } /** * Enable NFC adapter functions. * Does not toggle preferences. */ boolean enableInternal() { if (mState == NfcAdapter.STATE_ON) { return true; } Log.i(TAG, "Enabling NFC"); updateState(NfcAdapter.STATE_TURNING_ON); WatchDogThread watchDog = new WatchDogThread("enableInternal", INIT_WATCHDOG_MS); watchDog.start(); try { mRoutingWakeLock.acquire(); try { if (!mDeviceHost.initialize()) { Log.w(TAG, "Error enabling NFC"); updateState(NfcAdapter.STATE_OFF); return false; } } finally { mRoutingWakeLock.release(); } } finally { watchDog.cancel(); } if (mIsHceCapable) { // Generate the initial card emulation routing table mCardEmulationManager.onNfcEnabled(); } synchronized (NfcService.this) { mObjectMap.clear(); mP2pLinkManager.enableDisable(mIsNdefPushEnabled, true); updateState(NfcAdapter.STATE_ON); } initSoundPool(); /* Start polling loop */ applyRouting(true); return true; } /** * Disable all NFC adapter functions. * Does not toggle preferences. */ boolean disableInternal() { if (mState == NfcAdapter.STATE_OFF) { return true; } Log.i(TAG, "Disabling NFC"); updateState(NfcAdapter.STATE_TURNING_OFF); /* Sometimes mDeviceHost.deinitialize() hangs, use a watch-dog. * Implemented with a new thread (instead of a Handler or AsyncTask), * because the UI Thread and AsyncTask thread-pools can also get hung * when the NFC controller stops responding */ WatchDogThread watchDog = new WatchDogThread("disableInternal", ROUTING_WATCHDOG_MS); watchDog.start(); if (mIsHceCapable) { mCardEmulationManager.onNfcDisabled(); } mP2pLinkManager.enableDisable(false, false); // Stop watchdog if tag present // A convenient way to stop the watchdog properly consists of // disconnecting the tag. The polling loop shall be stopped before // to avoid the tag being discovered again. maybeDisconnectTarget(); mNfcDispatcher.setForegroundDispatch(null, null, null); boolean result = mDeviceHost.deinitialize(); if (DBG) Log.d(TAG, "mDeviceHost.deinitialize() = " + result); watchDog.cancel(); synchronized (NfcService.this) { mCurrentDiscoveryParameters = NfcDiscoveryParameters.getNfcOffParameters(); updateState(NfcAdapter.STATE_OFF); } releaseSoundPool(); return result; } void updateState(int newState) { synchronized (NfcService.this) { if (newState == mState) { return; } mState = newState; Intent intent = new Intent(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED); intent.setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); intent.putExtra(NfcAdapter.EXTRA_ADAPTER_STATE, mState); mContext.sendBroadcastAsUser(intent, UserHandle.CURRENT); } } } void saveNfcOnSetting(boolean on) { synchronized (NfcService.this) { mPrefsEditor.putBoolean(PREF_NFC_ON, on); mPrefsEditor.apply(); } } public void playSound(int sound) { synchronized (this) { if (mSoundPool == null) { Log.w(TAG, "Not playing sound when NFC is disabled"); return; } switch (sound) { case SOUND_START: mSoundPool.play(mStartSound, 1.0f, 1.0f, 0, 0, 1.0f); break; case SOUND_END: mSoundPool.play(mEndSound, 1.0f, 1.0f, 0, 0, 1.0f); break; case SOUND_ERROR: mSoundPool.play(mErrorSound, 1.0f, 1.0f, 0, 0, 1.0f); break; } } } synchronized int getUserId() { return mUserId; } void setBeamShareActivityState(boolean enabled) { UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE); // Propagate the state change to all user profiles related to the current // user. Note that the list returned by getUserProfiles contains the // current user. List luh = um.getUserProfiles(); for (UserHandle uh : luh){ enforceBeamShareActivityPolicy(mContext, uh, enabled); } } void enforceBeamShareActivityPolicy(Context context, UserHandle uh, boolean isGlobalEnabled){ UserManager um = (UserManager) context.getSystemService(Context.USER_SERVICE); IPackageManager mIpm = IPackageManager.Stub.asInterface(ServiceManager.getService("package")); boolean isActiveForUser = (!um.hasUserRestriction(UserManager.DISALLOW_OUTGOING_BEAM, uh)) && isGlobalEnabled; if (DBG){ Log.d(TAG, "Enforcing a policy change on user: " + uh + ", isActiveForUser = " + isActiveForUser); } try { mIpm.setComponentEnabledSetting(new ComponentName( BeamShareActivity.class.getPackageName$(), BeamShareActivity.class.getName()), isActiveForUser ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED : PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP, uh.getIdentifier()); } catch (RemoteException e) { Log.w(TAG, "Unable to change Beam status for user " + uh); } } final class NfcAdapterService extends INfcAdapter.Stub { @Override public boolean enable() throws RemoteException { NfcPermissions.enforceAdminPermissions(mContext); saveNfcOnSetting(true); new EnableDisableTask().execute(TASK_ENABLE); return true; } @Override public boolean disable(boolean saveState) throws RemoteException { NfcPermissions.enforceAdminPermissions(mContext); if (saveState) { saveNfcOnSetting(false); } new EnableDisableTask().execute(TASK_DISABLE); return true; } @Override public void pausePolling(int timeoutInMs) { NfcPermissions.enforceAdminPermissions(mContext); if (timeoutInMs <= 0 || timeoutInMs > MAX_POLLING_PAUSE_TIMEOUT) { Log.e(TAG, "Refusing to pause polling for " + timeoutInMs + "ms."); return; } synchronized (NfcService.this) { mPollingPaused = true; mDeviceHost.disableDiscovery(); mHandler.sendMessageDelayed( mHandler.obtainMessage(MSG_RESUME_POLLING), timeoutInMs); } } @Override public void resumePolling() { NfcPermissions.enforceAdminPermissions(mContext); synchronized (NfcService.this) { if (!mPollingPaused) { return; } mHandler.removeMessages(MSG_RESUME_POLLING); mPollingPaused = false; new ApplyRoutingTask().execute(); } } @Override public boolean isNdefPushEnabled() throws RemoteException { synchronized (NfcService.this) { return mState == NfcAdapter.STATE_ON && mIsNdefPushEnabled; } } @Override public boolean enableNdefPush() throws RemoteException { NfcPermissions.enforceAdminPermissions(mContext); synchronized (NfcService.this) { if (mIsNdefPushEnabled) { return true; } Log.i(TAG, "enabling NDEF Push"); mPrefsEditor.putBoolean(PREF_NDEF_PUSH_ON, true); mPrefsEditor.apply(); mIsNdefPushEnabled = true; setBeamShareActivityState(true); if (isNfcEnabled()) { mP2pLinkManager.enableDisable(true, true); } } return true; } @Override public boolean disableNdefPush() throws RemoteException { NfcPermissions.enforceAdminPermissions(mContext); synchronized (NfcService.this) { if (!mIsNdefPushEnabled) { return true; } Log.i(TAG, "disabling NDEF Push"); mPrefsEditor.putBoolean(PREF_NDEF_PUSH_ON, false); mPrefsEditor.apply(); mIsNdefPushEnabled = false; setBeamShareActivityState(false); if (isNfcEnabled()) { mP2pLinkManager.enableDisable(false, true); } } return true; } @Override public void setForegroundDispatch(PendingIntent intent, IntentFilter[] filters, TechListParcel techListsParcel) { NfcPermissions.enforceUserPermissions(mContext); if (!mForegroundUtils.isInForeground(Binder.getCallingUid())) { Log.e(TAG, "setForegroundDispatch: Caller not in foreground."); return; } // Short-cut the disable path if (intent == null && filters == null && techListsParcel == null) { mNfcDispatcher.setForegroundDispatch(null, null, null); return; } // Validate the IntentFilters if (filters != null) { if (filters.length == 0) { filters = null; } else { for (IntentFilter filter : filters) { if (filter == null) { throw new IllegalArgumentException("null IntentFilter"); } } } } // Validate the tech lists String[][] techLists = null; if (techListsParcel != null) { techLists = techListsParcel.getTechLists(); } mNfcDispatcher.setForegroundDispatch(intent, filters, techLists); } @Override public void setAppCallback(IAppCallback callback) { NfcPermissions.enforceUserPermissions(mContext); // don't allow Beam for managed profiles, or devices with a device owner or policy owner UserInfo userInfo = mUserManager.getUserInfo(UserHandle.getCallingUserId()); if(!mUserManager.hasUserRestriction( UserManager.DISALLOW_OUTGOING_BEAM, userInfo.getUserHandle())) { mP2pLinkManager.setNdefCallback(callback, Binder.getCallingUid()); } else if (DBG) { Log.d(TAG, "Disabling default Beam behavior"); } } @Override public boolean ignore(int nativeHandle, int debounceMs, ITagRemovedCallback callback) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag = (TagEndpoint) findAndRemoveObject(nativeHandle); if (tag != null) { // Store UID and params int uidLength = tag.getUid().length; synchronized (NfcService.this) { mDebounceTagDebounceMs = debounceMs; mDebounceTagUid = new byte[uidLength]; mDebounceTagRemovedCallback = callback; System.arraycopy(tag.getUid(), 0, mDebounceTagUid, 0, uidLength); } // Disconnect from this tag; this should resume the normal // polling loop (and enter listen mode for a while), before // we pick up any tags again. tag.disconnect(); mHandler.sendEmptyMessageDelayed(MSG_TAG_DEBOUNCE, debounceMs); return true; } else { return false; } } @Override public void verifyNfcPermission() { NfcPermissions.enforceUserPermissions(mContext); } @Override public void invokeBeam() { NfcPermissions.enforceUserPermissions(mContext); if (mForegroundUtils.isInForeground(Binder.getCallingUid())) { mP2pLinkManager.onManualBeamInvoke(null); } else { Log.e(TAG, "Calling activity not in foreground."); } } @Override public void invokeBeamInternal(BeamShareData shareData) { NfcPermissions.enforceAdminPermissions(mContext); Message msg = Message.obtain(); msg.what = MSG_INVOKE_BEAM; msg.obj = shareData; // We have to send this message delayed for two reasons: // 1) This is an IPC call from BeamShareActivity, which is // running when the user has invoked Beam through the // share menu. As soon as BeamShareActivity closes, the UI // will need some time to rebuild the original Activity. // Waiting here for a while gives a better chance of the UI // having been rebuilt, which means the screenshot that the // Beam animation is using will be more accurate. // 2) Similarly, because the Activity that launched BeamShareActivity // with an ACTION_SEND intent is now in paused state, the NDEF // callbacks that it has registered may no longer be valid. // Allowing the original Activity to resume will make sure we // it has a chance to re-register the NDEF message / callback, // so we share the right data. // // Note that this is somewhat of a hack because the delay may not actually // be long enough for 2) on very slow devices, but there's no better // way to do this right now without additional framework changes. mHandler.sendMessageDelayed(msg, INVOKE_BEAM_DELAY_MS); } @Override public INfcTag getNfcTagInterface() throws RemoteException { return mNfcTagService; } @Override public INfcCardEmulation getNfcCardEmulationInterface() { if (mIsHceCapable) { return mCardEmulationManager.getNfcCardEmulationInterface(); } else { return null; } } @Override public INfcFCardEmulation getNfcFCardEmulationInterface() { if (mIsHceFCapable) { return mCardEmulationManager.getNfcFCardEmulationInterface(); } else { return null; } } @Override public int getState() throws RemoteException { synchronized (NfcService.this) { return mState; } } @Override protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { NfcService.this.dump(fd, pw, args); } @Override public void dispatch(Tag tag) throws RemoteException { NfcPermissions.enforceAdminPermissions(mContext); mNfcDispatcher.dispatchTag(tag); } @Override public void setP2pModes(int initiatorModes, int targetModes) throws RemoteException { NfcPermissions.enforceAdminPermissions(mContext); mDeviceHost.setP2pInitiatorModes(initiatorModes); mDeviceHost.setP2pTargetModes(targetModes); applyRouting(true); } @Override public void setReaderMode(IBinder binder, IAppCallback callback, int flags, Bundle extras) throws RemoteException { int callingUid = Binder.getCallingUid(); if (callingUid != Process.SYSTEM_UID && !mForegroundUtils.isInForeground(callingUid)) { Log.e(TAG, "setReaderMode: Caller is not in foreground and is not system process."); return; } synchronized (NfcService.this) { if (!isNfcEnabled()) { Log.e(TAG, "setReaderMode() called while NFC is not enabled."); return; } if (flags != 0) { try { mReaderModeParams = new ReaderModeParams(); mReaderModeParams.callback = callback; mReaderModeParams.flags = flags; mReaderModeParams.presenceCheckDelay = extras != null ? (extras.getInt(NfcAdapter.EXTRA_READER_PRESENCE_CHECK_DELAY, DEFAULT_PRESENCE_CHECK_DELAY)) : DEFAULT_PRESENCE_CHECK_DELAY; binder.linkToDeath(mReaderModeDeathRecipient, 0); } catch (RemoteException e) { Log.e(TAG, "Remote binder has already died."); return; } } else { try { mReaderModeParams = null; binder.unlinkToDeath(mReaderModeDeathRecipient, 0); } catch (NoSuchElementException e) { Log.e(TAG, "Reader mode Binder was never registered."); } } applyRouting(false); } } @Override public INfcAdapterExtras getNfcAdapterExtrasInterface(String pkg) throws RemoteException { // nfc-extras implementation is no longer present in AOSP. return null; } @Override public void addNfcUnlockHandler(INfcUnlockHandler unlockHandler, int[] techList) { NfcPermissions.enforceAdminPermissions(mContext); int lockscreenPollMask = computeLockscreenPollMask(techList); synchronized (NfcService.this) { mNfcUnlockManager.addUnlockHandler(unlockHandler, lockscreenPollMask); } applyRouting(false); } @Override public void removeNfcUnlockHandler(INfcUnlockHandler token) throws RemoteException { synchronized (NfcService.this) { mNfcUnlockManager.removeUnlockHandler(token.asBinder()); } applyRouting(false); } private int computeLockscreenPollMask(int[] techList) { Map techCodeToMask = new HashMap(); techCodeToMask.put(TagTechnology.NFC_A, NfcService.NFC_POLL_A); techCodeToMask.put(TagTechnology.NFC_B, NfcService.NFC_POLL_B); techCodeToMask.put(TagTechnology.NFC_V, NfcService.NFC_POLL_ISO15693); techCodeToMask.put(TagTechnology.NFC_F, NfcService.NFC_POLL_F); techCodeToMask.put(TagTechnology.NFC_BARCODE, NfcService.NFC_POLL_KOVIO); int mask = 0; for (int i = 0; i < techList.length; i++) { if (techCodeToMask.containsKey(techList[i])) { mask |= techCodeToMask.get(techList[i]).intValue(); } } return mask; } } final class ReaderModeDeathRecipient implements IBinder.DeathRecipient { @Override public void binderDied() { synchronized (NfcService.this) { if (mReaderModeParams != null) { mReaderModeParams = null; applyRouting(false); } } } } final class TagService extends INfcTag.Stub { @Override public int connect(int nativeHandle, int technology) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag = null; if (!isNfcEnabled()) { return ErrorCodes.ERROR_NOT_INITIALIZED; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag == null) { return ErrorCodes.ERROR_DISCONNECT; } if (!tag.isPresent()) { return ErrorCodes.ERROR_DISCONNECT; } // Note that on most tags, all technologies are behind a single // handle. This means that the connect at the lower levels // will do nothing, as the tag is already connected to that handle. if (tag.connect(technology)) { return ErrorCodes.SUCCESS; } else { return ErrorCodes.ERROR_DISCONNECT; } } @Override public int reconnect(int nativeHandle) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag = null; // Check if NFC is enabled if (!isNfcEnabled()) { return ErrorCodes.ERROR_NOT_INITIALIZED; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag != null) { if (tag.reconnect()) { return ErrorCodes.SUCCESS; } else { return ErrorCodes.ERROR_DISCONNECT; } } return ErrorCodes.ERROR_DISCONNECT; } @Override public int[] getTechList(int nativeHandle) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); // Check if NFC is enabled if (!isNfcEnabled()) { return null; } /* find the tag in the hmap */ TagEndpoint tag = (TagEndpoint) findObject(nativeHandle); if (tag != null) { return tag.getTechList(); } return null; } @Override public boolean isPresent(int nativeHandle) throws RemoteException { TagEndpoint tag = null; // Check if NFC is enabled if (!isNfcEnabled()) { return false; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag == null) { return false; } return tag.isPresent(); } @Override public boolean isNdef(int nativeHandle) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag = null; // Check if NFC is enabled if (!isNfcEnabled()) { return false; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); int[] ndefInfo = new int[2]; if (tag == null) { return false; } return tag.checkNdef(ndefInfo); } @Override public TransceiveResult transceive(int nativeHandle, byte[] data, boolean raw) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag = null; byte[] response; // Check if NFC is enabled if (!isNfcEnabled()) { return null; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag != null) { // Check if length is within limits if (data.length > getMaxTransceiveLength(tag.getConnectedTechnology())) { return new TransceiveResult(TransceiveResult.RESULT_EXCEEDED_LENGTH, null); } int[] targetLost = new int[1]; response = tag.transceive(data, raw, targetLost); int result; if (response != null) { result = TransceiveResult.RESULT_SUCCESS; } else if (targetLost[0] == 1) { result = TransceiveResult.RESULT_TAGLOST; } else { result = TransceiveResult.RESULT_FAILURE; } return new TransceiveResult(result, response); } return null; } @Override public NdefMessage ndefRead(int nativeHandle) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag; // Check if NFC is enabled if (!isNfcEnabled()) { return null; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag != null) { byte[] buf = tag.readNdef(); if (buf == null) { return null; } /* Create an NdefMessage */ try { return new NdefMessage(buf); } catch (FormatException e) { return null; } } return null; } @Override public int ndefWrite(int nativeHandle, NdefMessage msg) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag; // Check if NFC is enabled if (!isNfcEnabled()) { return ErrorCodes.ERROR_NOT_INITIALIZED; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag == null) { return ErrorCodes.ERROR_IO; } if (msg == null) return ErrorCodes.ERROR_INVALID_PARAM; if (tag.writeNdef(msg.toByteArray())) { return ErrorCodes.SUCCESS; } else { return ErrorCodes.ERROR_IO; } } @Override public boolean ndefIsWritable(int nativeHandle) throws RemoteException { throw new UnsupportedOperationException(); } @Override public int ndefMakeReadOnly(int nativeHandle) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag; // Check if NFC is enabled if (!isNfcEnabled()) { return ErrorCodes.ERROR_NOT_INITIALIZED; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag == null) { return ErrorCodes.ERROR_IO; } if (tag.makeReadOnly()) { return ErrorCodes.SUCCESS; } else { return ErrorCodes.ERROR_IO; } } @Override public int formatNdef(int nativeHandle, byte[] key) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag; // Check if NFC is enabled if (!isNfcEnabled()) { return ErrorCodes.ERROR_NOT_INITIALIZED; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag == null) { return ErrorCodes.ERROR_IO; } if (tag.formatNdef(key)) { return ErrorCodes.SUCCESS; } else { return ErrorCodes.ERROR_IO; } } @Override public Tag rediscover(int nativeHandle) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); TagEndpoint tag = null; // Check if NFC is enabled if (!isNfcEnabled()) { return null; } /* find the tag in the hmap */ tag = (TagEndpoint) findObject(nativeHandle); if (tag != null) { // For now the prime usecase for rediscover() is to be able // to access the NDEF technology after formatting without // having to remove the tag from the field, or similar // to have access to NdefFormatable in case low-level commands // were used to remove NDEF. So instead of doing a full stack // rediscover (which is poorly supported at the moment anyway), // we simply remove these two technologies and detect them // again. tag.removeTechnology(TagTechnology.NDEF); tag.removeTechnology(TagTechnology.NDEF_FORMATABLE); tag.findAndReadNdef(); // Build a new Tag object to return Tag newTag = new Tag(tag.getUid(), tag.getTechList(), tag.getTechExtras(), tag.getHandle(), this); return newTag; } return null; } @Override public int setTimeout(int tech, int timeout) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); boolean success = mDeviceHost.setTimeout(tech, timeout); if (success) { return ErrorCodes.SUCCESS; } else { return ErrorCodes.ERROR_INVALID_PARAM; } } @Override public int getTimeout(int tech) throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); return mDeviceHost.getTimeout(tech); } @Override public void resetTimeouts() throws RemoteException { NfcPermissions.enforceUserPermissions(mContext); mDeviceHost.resetTimeouts(); } @Override public boolean canMakeReadOnly(int ndefType) throws RemoteException { return mDeviceHost.canMakeReadOnly(ndefType); } @Override public int getMaxTransceiveLength(int tech) throws RemoteException { return mDeviceHost.getMaxTransceiveLength(tech); } @Override public boolean getExtendedLengthApdusSupported() throws RemoteException { return mDeviceHost.getExtendedLengthApdusSupported(); } } boolean isNfcEnabledOrShuttingDown() { synchronized (this) { return (mState == NfcAdapter.STATE_ON || mState == NfcAdapter.STATE_TURNING_OFF); } } boolean isNfcEnabled() { synchronized (this) { return mState == NfcAdapter.STATE_ON; } } class WatchDogThread extends Thread { final Object mCancelWaiter = new Object(); final int mTimeout; boolean mCanceled = false; public WatchDogThread(String threadName, int timeout) { super(threadName); mTimeout = timeout; } @Override public void run() { try { synchronized (mCancelWaiter) { mCancelWaiter.wait(mTimeout); if (mCanceled) { return; } } } catch (InterruptedException e) { // Should not happen; fall-through to abort. Log.w(TAG, "Watchdog thread interruped."); interrupt(); } Log.e(TAG, "Watchdog triggered, aborting."); mDeviceHost.doAbort(); } public synchronized void cancel() { synchronized (mCancelWaiter) { mCanceled = true; mCancelWaiter.notify(); } } } static byte[] hexStringToBytes(String s) { if (s == null || s.length() == 0) return null; int len = s.length(); if (len % 2 != 0) { s = '0' + s; len++; } byte[] data = new byte[len / 2]; for (int i = 0; i < len; i += 2) { data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16)); } return data; } /** * Read mScreenState and apply NFC-C polling and NFC-EE routing */ void applyRouting(boolean force) { synchronized (this) { if (!isNfcEnabledOrShuttingDown()) { return; } WatchDogThread watchDog = new WatchDogThread("applyRouting", ROUTING_WATCHDOG_MS); if (mInProvisionMode) { mInProvisionMode = Settings.Secure.getInt(mContentResolver, Settings.Global.DEVICE_PROVISIONED, 0) == 0; if (!mInProvisionMode) { // Notify dispatcher it's fine to dispatch to any package now // and allow handover transfers. mNfcDispatcher.disableProvisioningMode(); } } // Special case: if we're transitioning to unlocked state while // still talking to a tag, postpone re-configuration. if (mScreenState == ScreenStateHelper.SCREEN_STATE_ON_UNLOCKED && isTagPresent()) { Log.d(TAG, "Not updating discovery parameters, tag connected."); mHandler.sendMessageDelayed(mHandler.obtainMessage(MSG_RESUME_POLLING), APPLY_ROUTING_RETRY_TIMEOUT_MS); return; } try { watchDog.start(); // Compute new polling parameters NfcDiscoveryParameters newParams = computeDiscoveryParameters(mScreenState); if (force || !newParams.equals(mCurrentDiscoveryParameters)) { if (newParams.shouldEnableDiscovery()) { boolean shouldRestart = mCurrentDiscoveryParameters.shouldEnableDiscovery(); mDeviceHost.enableDiscovery(newParams, shouldRestart); } else { mDeviceHost.disableDiscovery(); } mCurrentDiscoveryParameters = newParams; } else { Log.d(TAG, "Discovery configuration equal, not updating."); } } finally { watchDog.cancel(); } } } private NfcDiscoveryParameters computeDiscoveryParameters(int screenState) { // Recompute discovery parameters based on screen state NfcDiscoveryParameters.Builder paramsBuilder = NfcDiscoveryParameters.newBuilder(); // Polling if (screenState >= NFC_POLLING_MODE) { // Check if reader-mode is enabled if (mReaderModeParams != null) { int techMask = 0; if ((mReaderModeParams.flags & NfcAdapter.FLAG_READER_NFC_A) != 0) techMask |= NFC_POLL_A; if ((mReaderModeParams.flags & NfcAdapter.FLAG_READER_NFC_B) != 0) techMask |= NFC_POLL_B; if ((mReaderModeParams.flags & NfcAdapter.FLAG_READER_NFC_F) != 0) techMask |= NFC_POLL_F; if ((mReaderModeParams.flags & NfcAdapter.FLAG_READER_NFC_V) != 0) techMask |= NFC_POLL_ISO15693; if ((mReaderModeParams.flags & NfcAdapter.FLAG_READER_NFC_BARCODE) != 0) techMask |= NFC_POLL_KOVIO; paramsBuilder.setTechMask(techMask); paramsBuilder.setEnableReaderMode(true); } else { paramsBuilder.setTechMask(NfcDiscoveryParameters.NFC_POLL_DEFAULT); paramsBuilder.setEnableP2p(mIsNdefPushEnabled); } } else if (screenState == ScreenStateHelper.SCREEN_STATE_ON_LOCKED && mInProvisionMode) { paramsBuilder.setTechMask(NfcDiscoveryParameters.NFC_POLL_DEFAULT); // enable P2P for MFM/EDU/Corp provisioning paramsBuilder.setEnableP2p(true); } else if (screenState == ScreenStateHelper.SCREEN_STATE_ON_LOCKED && (mIsLiveCaseEnabled || mNfcUnlockManager.isLockscreenPollingEnabled())) { int techMask = 0; // enable polling for Live Case technologies if (mIsLiveCaseEnabled) techMask |= mLiveCaseTechnology; if (mNfcUnlockManager.isLockscreenPollingEnabled()) techMask |= mNfcUnlockManager.getLockscreenPollMask(); paramsBuilder.setTechMask(techMask); paramsBuilder.setEnableLowPowerDiscovery(false); paramsBuilder.setEnableP2p(false); } if (mIsHceCapable && mScreenState >= ScreenStateHelper.SCREEN_STATE_ON_LOCKED) { // Host routing is always enabled at lock screen or later paramsBuilder.setEnableHostRouting(true); } return paramsBuilder.build(); } private boolean isTagPresent() { for (Object object : mObjectMap.values()) { if (object instanceof TagEndpoint) { return ((TagEndpoint) object).isPresent(); } } return false; } /** * Disconnect any target if present */ void maybeDisconnectTarget() { if (!isNfcEnabledOrShuttingDown()) { return; } Object[] objectsToDisconnect; synchronized (this) { Object[] objectValues = mObjectMap.values().toArray(); // Copy the array before we clear mObjectMap, // just in case the HashMap values are backed by the same array objectsToDisconnect = Arrays.copyOf(objectValues, objectValues.length); mObjectMap.clear(); } for (Object o : objectsToDisconnect) { if (DBG) Log.d(TAG, "disconnecting " + o.getClass().getName()); if (o instanceof TagEndpoint) { // Disconnect from tags TagEndpoint tag = (TagEndpoint) o; tag.disconnect(); } else if (o instanceof NfcDepEndpoint) { // Disconnect from P2P devices NfcDepEndpoint device = (NfcDepEndpoint) o; if (device.getMode() == NfcDepEndpoint.MODE_P2P_TARGET) { // Remote peer is target, request disconnection device.disconnect(); } else { // Remote peer is initiator, we cannot disconnect // Just wait for field removal } } } } Object findObject(int key) { synchronized (this) { Object device = mObjectMap.get(key); if (device == null) { Log.w(TAG, "Handle not found"); } return device; } } Object findAndRemoveObject(int handle) { synchronized (this) { Object device = mObjectMap.get(handle); if (device == null) { Log.w(TAG, "Handle not found"); } else { mObjectMap.remove(handle); } return device; } } void registerTagObject(TagEndpoint tag) { synchronized (this) { mObjectMap.put(tag.getHandle(), tag); } } void unregisterObject(int handle) { synchronized (this) { mObjectMap.remove(handle); } } /** * For use by code in this process */ public LlcpSocket createLlcpSocket(int sap, int miu, int rw, int linearBufferLength) throws LlcpException { return mDeviceHost.createLlcpSocket(sap, miu, rw, linearBufferLength); } /** * For use by code in this process */ public LlcpConnectionlessSocket createLlcpConnectionLessSocket(int sap, String sn) throws LlcpException { return mDeviceHost.createLlcpConnectionlessSocket(sap, sn); } /** * For use by code in this process */ public LlcpServerSocket createLlcpServerSocket(int sap, String sn, int miu, int rw, int linearBufferLength) throws LlcpException { return mDeviceHost.createLlcpServerSocket(sap, sn, miu, rw, linearBufferLength); } public void sendMockNdefTag(NdefMessage msg) { sendMessage(MSG_MOCK_NDEF, msg); } public void routeAids(String aid, int route) { Message msg = mHandler.obtainMessage(); msg.what = MSG_ROUTE_AID; msg.arg1 = route; msg.obj = aid; mHandler.sendMessage(msg); } public void unrouteAids(String aid) { sendMessage(MSG_UNROUTE_AID, aid); } private byte[] getT3tIdentifierBytes(String systemCode, String nfcId2) { ByteBuffer buffer = ByteBuffer.allocate(2 + 8); buffer.put(hexStringToBytes(systemCode)); buffer.put(hexStringToBytes(nfcId2)); byte[] t3tIdBytes = new byte[buffer.position()]; buffer.position(0); buffer.get(t3tIdBytes); return t3tIdBytes; } public void registerT3tIdentifier(String systemCode, String nfcId2) { Log.d(TAG, "request to register LF_T3T_IDENTIFIER"); byte[] t3tIdentifier = getT3tIdentifierBytes(systemCode, nfcId2); sendMessage(MSG_REGISTER_T3T_IDENTIFIER, t3tIdentifier); } public void deregisterT3tIdentifier(String systemCode, String nfcId2) { Log.d(TAG, "request to deregister LF_T3T_IDENTIFIER"); byte[] t3tIdentifier = getT3tIdentifierBytes(systemCode, nfcId2); sendMessage(MSG_DEREGISTER_T3T_IDENTIFIER, t3tIdentifier); } public void clearT3tIdentifiersCache() { Log.d(TAG, "clear T3t Identifiers Cache"); mDeviceHost.clearT3tIdentifiersCache(); } public int getLfT3tMax() { return mDeviceHost.getLfT3tMax(); } public void commitRouting() { mHandler.sendEmptyMessage(MSG_COMMIT_ROUTING); } public boolean sendData(byte[] data) { return mDeviceHost.sendRawFrame(data); } void sendMessage(int what, Object obj) { Message msg = mHandler.obtainMessage(); msg.what = what; msg.obj = obj; mHandler.sendMessage(msg); } final class NfcServiceHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { case MSG_ROUTE_AID: { int route = msg.arg1; String aid = (String) msg.obj; mDeviceHost.routeAid(hexStringToBytes(aid), route); // Restart polling config break; } case MSG_UNROUTE_AID: { String aid = (String) msg.obj; mDeviceHost.unrouteAid(hexStringToBytes(aid)); break; } case MSG_REGISTER_T3T_IDENTIFIER: { Log.d(TAG, "message to register LF_T3T_IDENTIFIER"); mDeviceHost.disableDiscovery(); byte[] t3tIdentifier = (byte[]) msg.obj; mDeviceHost.registerT3tIdentifier(t3tIdentifier); NfcDiscoveryParameters params = computeDiscoveryParameters(mScreenState); boolean shouldRestart = mCurrentDiscoveryParameters.shouldEnableDiscovery(); mDeviceHost.enableDiscovery(params, shouldRestart); break; } case MSG_DEREGISTER_T3T_IDENTIFIER: { Log.d(TAG, "message to deregister LF_T3T_IDENTIFIER"); mDeviceHost.disableDiscovery(); byte[] t3tIdentifier = (byte[]) msg.obj; mDeviceHost.deregisterT3tIdentifier(t3tIdentifier); NfcDiscoveryParameters params = computeDiscoveryParameters(mScreenState); boolean shouldRestart = mCurrentDiscoveryParameters.shouldEnableDiscovery(); mDeviceHost.enableDiscovery(params, shouldRestart); break; } case MSG_INVOKE_BEAM: { mP2pLinkManager.onManualBeamInvoke((BeamShareData)msg.obj); break; } case MSG_COMMIT_ROUTING: { boolean commit = false; synchronized (NfcService.this) { if (mCurrentDiscoveryParameters.shouldEnableDiscovery()) { commit = true; } else { Log.d(TAG, "Not committing routing because discovery is disabled."); } } if (commit) { mDeviceHost.commitRouting(); } break; } case MSG_MOCK_NDEF: { NdefMessage ndefMsg = (NdefMessage) msg.obj; Bundle extras = new Bundle(); extras.putParcelable(Ndef.EXTRA_NDEF_MSG, ndefMsg); extras.putInt(Ndef.EXTRA_NDEF_MAXLENGTH, 0); extras.putInt(Ndef.EXTRA_NDEF_CARDSTATE, Ndef.NDEF_MODE_READ_ONLY); extras.putInt(Ndef.EXTRA_NDEF_TYPE, Ndef.TYPE_OTHER); Tag tag = Tag.createMockTag(new byte[]{0x00}, new int[]{TagTechnology.NDEF}, new Bundle[]{extras}); Log.d(TAG, "mock NDEF tag, starting corresponding activity"); Log.d(TAG, tag.toString()); int dispatchStatus = mNfcDispatcher.dispatchTag(tag); if (dispatchStatus == NfcDispatcher.DISPATCH_SUCCESS) { playSound(SOUND_END); } else if (dispatchStatus == NfcDispatcher.DISPATCH_FAIL) { playSound(SOUND_ERROR); } break; } case MSG_NDEF_TAG: if (DBG) Log.d(TAG, "Tag detected, notifying applications"); mNumTagsDetected.incrementAndGet(); TagEndpoint tag = (TagEndpoint) msg.obj; byte[] debounceTagUid; int debounceTagMs; ITagRemovedCallback debounceTagRemovedCallback; synchronized (NfcService.this) { debounceTagUid = mDebounceTagUid; debounceTagMs = mDebounceTagDebounceMs; debounceTagRemovedCallback = mDebounceTagRemovedCallback; } ReaderModeParams readerParams = null; int presenceCheckDelay = DEFAULT_PRESENCE_CHECK_DELAY; DeviceHost.TagDisconnectedCallback callback = new DeviceHost.TagDisconnectedCallback() { @Override public void onTagDisconnected(long handle) { applyRouting(false); } }; synchronized (NfcService.this) { readerParams = mReaderModeParams; } if (readerParams != null) { presenceCheckDelay = readerParams.presenceCheckDelay; if ((readerParams.flags & NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK) != 0) { if (DBG) Log.d(TAG, "Skipping NDEF detection in reader mode"); tag.startPresenceChecking(presenceCheckDelay, callback); dispatchTagEndpoint(tag, readerParams); break; } } if (tag.getConnectedTechnology() == TagTechnology.NFC_BARCODE) { // When these tags start containing NDEF, they will require // the stack to deal with them in a different way, since // they are activated only really shortly. // For now, don't consider NDEF on these. if (DBG) Log.d(TAG, "Skipping NDEF detection for NFC Barcode"); tag.startPresenceChecking(presenceCheckDelay, callback); dispatchTagEndpoint(tag, readerParams); break; } NdefMessage ndefMsg = tag.findAndReadNdef(); if (ndefMsg == null) { // First try to see if this was a bad tag read if (!tag.reconnect()) { tag.disconnect(); break; } } if (debounceTagUid != null) { // If we're debouncing and the UID or the NDEF message of the tag match, // don't dispatch but drop it. if (Arrays.equals(debounceTagUid, tag.getUid()) || (ndefMsg != null && ndefMsg.equals(mLastReadNdefMessage))) { mHandler.removeMessages(MSG_TAG_DEBOUNCE); mHandler.sendEmptyMessageDelayed(MSG_TAG_DEBOUNCE, debounceTagMs); tag.disconnect(); return; } else { synchronized (NfcService.this) { mDebounceTagUid = null; mDebounceTagRemovedCallback = null; } if (debounceTagRemovedCallback != null) { try { debounceTagRemovedCallback.onTagRemoved(); } catch (RemoteException e) { // Ignore } } } } mLastReadNdefMessage = ndefMsg; tag.startPresenceChecking(presenceCheckDelay, callback); dispatchTagEndpoint(tag, readerParams); break; case MSG_LLCP_LINK_ACTIVATION: if (mIsDebugBuild) { Intent actIntent = new Intent(ACTION_LLCP_UP); mContext.sendBroadcast(actIntent); } llcpActivated((NfcDepEndpoint) msg.obj); break; case MSG_LLCP_LINK_DEACTIVATED: if (mIsDebugBuild) { Intent deactIntent = new Intent(ACTION_LLCP_DOWN); mContext.sendBroadcast(deactIntent); } NfcDepEndpoint device = (NfcDepEndpoint) msg.obj; boolean needsDisconnect = false; Log.d(TAG, "LLCP Link Deactivated message. Restart polling loop."); synchronized (NfcService.this) { /* Check if the device has been already unregistered */ if (mObjectMap.remove(device.getHandle()) != null) { /* Disconnect if we are initiator */ if (device.getMode() == NfcDepEndpoint.MODE_P2P_TARGET) { if (DBG) Log.d(TAG, "disconnecting from target"); needsDisconnect = true; } else { if (DBG) Log.d(TAG, "not disconnecting from initiator"); } } } if (needsDisconnect) { device.disconnect(); // restarts polling loop } mP2pLinkManager.onLlcpDeactivated(); break; case MSG_LLCP_LINK_FIRST_PACKET: mP2pLinkManager.onLlcpFirstPacketReceived(); break; case MSG_RF_FIELD_ACTIVATED: Intent fieldOnIntent = new Intent(ACTION_RF_FIELD_ON_DETECTED); sendNfcEeAccessProtectedBroadcast(fieldOnIntent); break; case MSG_RF_FIELD_DEACTIVATED: Intent fieldOffIntent = new Intent(ACTION_RF_FIELD_OFF_DETECTED); sendNfcEeAccessProtectedBroadcast(fieldOffIntent); break; case MSG_RESUME_POLLING: mNfcAdapter.resumePolling(); break; case MSG_TAG_DEBOUNCE: // Didn't see the tag again, tag is gone ITagRemovedCallback tagRemovedCallback; synchronized (NfcService.this) { mDebounceTagUid = null; tagRemovedCallback = mDebounceTagRemovedCallback; mDebounceTagRemovedCallback = null; } if (tagRemovedCallback != null) { try { tagRemovedCallback.onTagRemoved(); } catch (RemoteException e) { // Ignore } } break; case MSG_UPDATE_STATS: if (mNumTagsDetected.get() > 0) { MetricsLogger.count(mContext, TRON_NFC_TAG, mNumTagsDetected.get()); mNumTagsDetected.set(0); } if (mNumHceDetected.get() > 0) { MetricsLogger.count(mContext, TRON_NFC_CE, mNumHceDetected.get()); mNumHceDetected.set(0); } if (mNumP2pDetected.get() > 0) { MetricsLogger.count(mContext, TRON_NFC_P2P, mNumP2pDetected.get()); mNumP2pDetected.set(0); } removeMessages(MSG_UPDATE_STATS); sendEmptyMessageDelayed(MSG_UPDATE_STATS, STATS_UPDATE_INTERVAL_MS); break; default: Log.e(TAG, "Unknown message received"); break; } } private void sendNfcEeAccessProtectedBroadcast(Intent intent) { intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES); // Resume app switches so the receivers can start activites without delay mNfcDispatcher.resumeAppSwitches(); ArrayList matchingPackages = new ArrayList(); ArrayList preferredPackages = new ArrayList(); synchronized (this) { for (PackageInfo pkg : mInstalledPackages) { if (pkg != null && pkg.applicationInfo != null) { if (mNfceeAccessControl.check(pkg.applicationInfo)) { matchingPackages.add(pkg.packageName); if (mCardEmulationManager != null && mCardEmulationManager.packageHasPreferredService(pkg.packageName)) { preferredPackages.add(pkg.packageName); } } } } if (preferredPackages.size() > 0) { // If there's any packages in here which are preferred, only // send field events to those packages, to prevent other apps // with signatures in nfcee_access.xml from acting upon the events. for (String packageName : preferredPackages){ intent.setPackage(packageName); mContext.sendBroadcast(intent); } } else { for (String packageName : matchingPackages){ intent.setPackage(packageName); mContext.sendBroadcast(intent); } } } } private boolean llcpActivated(NfcDepEndpoint device) { Log.d(TAG, "LLCP Activation message"); if (device.getMode() == NfcDepEndpoint.MODE_P2P_TARGET) { if (DBG) Log.d(TAG, "NativeP2pDevice.MODE_P2P_TARGET"); if (device.connect()) { /* Check LLCP compliancy */ if (mDeviceHost.doCheckLlcp()) { /* Activate LLCP Link */ if (mDeviceHost.doActivateLlcp()) { if (DBG) Log.d(TAG, "Initiator Activate LLCP OK"); synchronized (NfcService.this) { // Register P2P device mObjectMap.put(device.getHandle(), device); } mP2pLinkManager.onLlcpActivated(device.getLlcpVersion()); return true; } else { /* should not happen */ Log.w(TAG, "Initiator LLCP activation failed. Disconnect."); device.disconnect(); } } else { if (DBG) Log.d(TAG, "Remote Target does not support LLCP. Disconnect."); device.disconnect(); } } else { if (DBG) Log.d(TAG, "Cannot connect remote Target. Polling loop restarted."); /* * The polling loop should have been restarted in failing * doConnect */ } } else if (device.getMode() == NfcDepEndpoint.MODE_P2P_INITIATOR) { if (DBG) Log.d(TAG, "NativeP2pDevice.MODE_P2P_INITIATOR"); /* Check LLCP compliancy */ if (mDeviceHost.doCheckLlcp()) { /* Activate LLCP Link */ if (mDeviceHost.doActivateLlcp()) { if (DBG) Log.d(TAG, "Target Activate LLCP OK"); synchronized (NfcService.this) { // Register P2P device mObjectMap.put(device.getHandle(), device); } mP2pLinkManager.onLlcpActivated(device.getLlcpVersion()); return true; } } else { Log.w(TAG, "checkLlcp failed"); } } return false; } private void dispatchTagEndpoint(TagEndpoint tagEndpoint, ReaderModeParams readerParams) { Tag tag = new Tag(tagEndpoint.getUid(), tagEndpoint.getTechList(), tagEndpoint.getTechExtras(), tagEndpoint.getHandle(), mNfcTagService); registerTagObject(tagEndpoint); if (readerParams != null) { try { if ((readerParams.flags & NfcAdapter.FLAG_READER_NO_PLATFORM_SOUNDS) == 0) { playSound(SOUND_END); } if (readerParams.callback != null) { readerParams.callback.onTagDiscovered(tag); return; } else { // Follow normal dispatch below } } catch (RemoteException e) { Log.e(TAG, "Reader mode remote has died, falling back.", e); // Intentional fall-through } catch (Exception e) { // Catch any other exception Log.e(TAG, "App exception, not dispatching.", e); return; } } int dispatchResult = mNfcDispatcher.dispatchTag(tag); if (dispatchResult == NfcDispatcher.DISPATCH_FAIL) { unregisterObject(tagEndpoint.getHandle()); playSound(SOUND_ERROR); } else if (dispatchResult == NfcDispatcher.DISPATCH_SUCCESS) { playSound(SOUND_END); } } } private NfcServiceHandler mHandler = new NfcServiceHandler(); class ApplyRoutingTask extends AsyncTask { @Override protected Void doInBackground(Integer... params) { synchronized (NfcService.this) { if (params == null || params.length != 1) { // force apply current routing applyRouting(true); return null; } mScreenState = params[0].intValue(); mRoutingWakeLock.acquire(); try { applyRouting(false); } finally { mRoutingWakeLock.release(); } return null; } } } private final BroadcastReceiver mReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals(Intent.ACTION_SCREEN_ON) || action.equals(Intent.ACTION_SCREEN_OFF) || action.equals(Intent.ACTION_USER_PRESENT)) { // Perform applyRouting() in AsyncTask to serialize blocking calls int screenState = ScreenStateHelper.SCREEN_STATE_OFF; if (action.equals(Intent.ACTION_SCREEN_OFF)) { screenState = ScreenStateHelper.SCREEN_STATE_OFF; } else if (action.equals(Intent.ACTION_SCREEN_ON)) { screenState = mKeyguard.isKeyguardLocked() ? ScreenStateHelper.SCREEN_STATE_ON_LOCKED : ScreenStateHelper.SCREEN_STATE_ON_UNLOCKED; } else if (action.equals(Intent.ACTION_USER_PRESENT)) { screenState = ScreenStateHelper.SCREEN_STATE_ON_UNLOCKED; } new ApplyRoutingTask().execute(Integer.valueOf(screenState)); } else if (action.equals(Intent.ACTION_USER_SWITCHED)) { int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); synchronized (this) { mUserId = userId; } mP2pLinkManager.onUserSwitched(getUserId()); if (mIsHceCapable) { mCardEmulationManager.onUserSwitched(getUserId()); } } } }; private final BroadcastReceiver mOwnerReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals(Intent.ACTION_PACKAGE_REMOVED) || action.equals(Intent.ACTION_PACKAGE_ADDED) || action.equals(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE) || action.equals(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE)) { updatePackageCache(); if (action.equals(Intent.ACTION_PACKAGE_REMOVED)) { // Clear the NFCEE access cache in case a UID gets recycled mNfceeAccessControl.invalidateCache(); } } } }; private final BroadcastReceiver mPolicyReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent){ String action = intent.getAction(); if (DevicePolicyManager.ACTION_DEVICE_POLICY_MANAGER_STATE_CHANGED .equals(action)) { enforceBeamShareActivityPolicy(context, new UserHandle(getSendingUserId()), mIsNdefPushEnabled); } } }; /** * for debugging only - no i18n */ static String stateToString(int state) { switch (state) { case NfcAdapter.STATE_OFF: return "off"; case NfcAdapter.STATE_TURNING_ON: return "turning on"; case NfcAdapter.STATE_ON: return "on"; case NfcAdapter.STATE_TURNING_OFF: return "turning off"; default: return ""; } } void dump(FileDescriptor fd, PrintWriter pw, String[] args) { if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { pw.println("Permission Denial: can't dump nfc from from pid=" + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid() + " without permission " + android.Manifest.permission.DUMP); return; } synchronized (this) { pw.println("mState=" + stateToString(mState)); pw.println("mIsZeroClickRequested=" + mIsNdefPushEnabled); pw.println("mScreenState=" + ScreenStateHelper.screenStateToString(mScreenState)); pw.println(mCurrentDiscoveryParameters); mP2pLinkManager.dump(fd, pw, args); if (mIsHceCapable) { mCardEmulationManager.dump(fd, pw, args); } mNfcDispatcher.dump(fd, pw, args); pw.println(mDeviceHost.dump()); } } }