/src/com/android/nfc/NfcService.java

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/*
 * 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 com.android.internal.nfc.LlcpServiceSocket;
import com.android.internal.nfc.LlcpSocket;
import com.android.nfc.RegisteredComponentCache.ComponentInfo;
import com.android.nfc.ndefpush.NdefPushClient;
import com.android.nfc.ndefpush.NdefPushServer;
import com.android.nfc3.R;

import android.app.Activity;
import android.app.ActivityManagerNative;
import android.app.Application;
import android.app.IActivityManager;
import android.app.PendingIntent;
import android.app.PendingIntent.CanceledException;
import android.app.StatusBarManager;
import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.nfc.ApduList;
import android.nfc.ErrorCodes;
import android.nfc.FormatException;
import android.nfc.ILlcpConnectionlessSocket;
import android.nfc.ILlcpServiceSocket;
import android.nfc.ILlcpSocket;
import android.nfc.INfcAdapter;
import android.nfc.INfcAdapterExtras;
import android.nfc.INfcTag;
import android.nfc.IP2pInitiator;
import android.nfc.IP2pTarget;
import android.nfc.LlcpPacket;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.nfc.TechListParcel;
import android.nfc.TransceiveResult;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.PowerManager;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.util.Log;

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.Charsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;

public class NfcService extends Application {
    private static final String ACTION_MASTER_CLEAR_NOTIFICATION = "android.intent.action.MASTER_CLEAR_NOTIFICATION";

    static final boolean DBG = false;

    private static final String MY_TAG_FILE_NAME = "mytag";
    private static final String SE_RESET_SCRIPT_FILE_NAME = "/system/etc/se-reset-script";
    private static final String NFC_CONTROLLER_FIRMWARE_FILE_NAME = "/system/lib/libpn544_fw.so";

    static {
        System.loadLibrary("nfc_jni");
    }

    /**
     * NFC Forum "URI Record Type Definition"
     *
     * This is a mapping of "URI Identifier Codes" to URI string prefixes,
     * per section 3.2.2 of the NFC Forum URI Record Type Definition document.
     */
    private static final String[] URI_PREFIX_MAP = new String[] {
            "", // 0x00
            "http://www.", // 0x01
            "https://www.", // 0x02
            "http://", // 0x03
            "https://", // 0x04
            "tel:", // 0x05
            "mailto:", // 0x06
            "ftp://anonymous:anonymous@", // 0x07
            "ftp://ftp.", // 0x08
            "ftps://", // 0x09
            "sftp://", // 0x0A
            "smb://", // 0x0B
            "nfs://", // 0x0C
            "ftp://", // 0x0D
            "dav://", // 0x0E
            "news:", // 0x0F
            "telnet://", // 0x10
            "imap:", // 0x11
            "rtsp://", // 0x12
            "urn:", // 0x13
            "pop:", // 0x14
            "sip:", // 0x15
            "sips:", // 0x16
            "tftp:", // 0x17
            "btspp://", // 0x18
            "btl2cap://", // 0x19
            "btgoep://", // 0x1A
            "tcpobex://", // 0x1B
            "irdaobex://", // 0x1C
            "file://", // 0x1D
            "urn:epc:id:", // 0x1E
            "urn:epc:tag:", // 0x1F
            "urn:epc:pat:", // 0x20
            "urn:epc:raw:", // 0x21
            "urn:epc:", // 0x22
    };

    public static final String SERVICE_NAME = "nfc";

    private static final String TAG = "NfcService";

    private static final String NFC_PERM = android.Manifest.permission.NFC;
    private static final String NFC_PERM_ERROR = "NFC permission required";
    private static final String ADMIN_PERM = android.Manifest.permission.WRITE_SECURE_SETTINGS;
    private static final String ADMIN_PERM_ERROR = "WRITE_SECURE_SETTINGS permission required";
    private static final String NFCEE_ADMIN_PERM = "com.android.nfc.permission.NFCEE_ADMIN";
    private static final String NFCEE_ADMIN_PERM_ERROR = "NFCEE_ADMIN permission required";

    private static final String PREF = "NfcServicePrefs";

    private static final String PREF_NFC_ON = "nfc_on";
    private static final boolean NFC_ON_DEFAULT = true;

    private static final String PREF_FIRST_BOOT = "first_boot";

    private static final String PREF_LLCP_LTO = "llcp_lto";
    private static final int LLCP_LTO_DEFAULT = 150;
    private static final int LLCP_LTO_MAX = 255;

    /** Maximum Information Unit */
    private static final String PREF_LLCP_MIU = "llcp_miu";
    private static final int LLCP_MIU_DEFAULT = 128;
    private static final int LLCP_MIU_MAX = 2176;

    /** Well Known Service List */
    private static final String PREF_LLCP_WKS = "llcp_wks";
    private static final int LLCP_WKS_DEFAULT = 1;
    private static final int LLCP_WKS_MAX = 15;

    private static final String PREF_LLCP_OPT = "llcp_opt";
    private static final int LLCP_OPT_DEFAULT = 0;
    private static final int LLCP_OPT_MAX = 3;

    private static final String PREF_DISCOVERY_A = "discovery_a";
    private static final boolean DISCOVERY_A_DEFAULT = true;

    private static final String PREF_DISCOVERY_B = "discovery_b";
    private static final boolean DISCOVERY_B_DEFAULT = true;

    private static final String PREF_DISCOVERY_F = "discovery_f";
    private static final boolean DISCOVERY_F_DEFAULT = true;

    private static final String PREF_DISCOVERY_15693 = "discovery_15693";
    private static final boolean DISCOVERY_15693_DEFAULT = true;

    private static final String PREF_DISCOVERY_NFCIP = "discovery_nfcip";
    private static final boolean DISCOVERY_NFCIP_DEFAULT = true;

    private static final String PREF_FIRMWARE_MODTIME = "firmware_modtime";
    private static final long FIRMWARE_MODTIME_DEFAULT = -1;

    /** NFC Reader Discovery mode for enableDiscovery() */
    private static final int DISCOVERY_MODE_READER = 0;

    private static final int PROPERTY_LLCP_LTO = 0;
    private static final String PROPERTY_LLCP_LTO_VALUE = "llcp.lto";
    private static final int PROPERTY_LLCP_MIU = 1;
    private static final String PROPERTY_LLCP_MIU_VALUE = "llcp.miu";
    private static final int PROPERTY_LLCP_WKS = 2;
    private static final String PROPERTY_LLCP_WKS_VALUE = "llcp.wks";
    private static final int PROPERTY_LLCP_OPT = 3;
    private static final String PROPERTY_LLCP_OPT_VALUE = "llcp.opt";
    private static final int PROPERTY_NFC_DISCOVERY_A = 4;
    private static final String PROPERTY_NFC_DISCOVERY_A_VALUE = "discovery.iso14443A";
    private static final int PROPERTY_NFC_DISCOVERY_B = 5;
    private static final String PROPERTY_NFC_DISCOVERY_B_VALUE = "discovery.iso14443B";
    private static final int PROPERTY_NFC_DISCOVERY_F = 6;
    private static final String PROPERTY_NFC_DISCOVERY_F_VALUE = "discovery.felica";
    private static final int PROPERTY_NFC_DISCOVERY_15693 = 7;
    private static final String PROPERTY_NFC_DISCOVERY_15693_VALUE = "discovery.iso15693";
    private static final int PROPERTY_NFC_DISCOVERY_NFCIP = 8;
    private static final String PROPERTY_NFC_DISCOVERY_NFCIP_VALUE = "discovery.nfcip";

    static final int MSG_NDEF_TAG = 0;
    static final int MSG_CARD_EMULATION = 1;
    static final int MSG_LLCP_LINK_ACTIVATION = 2;
    static final int MSG_LLCP_LINK_DEACTIVATED = 3;
    static final int MSG_TARGET_DESELECTED = 4;
    static final int MSG_SHOW_MY_TAG_ICON = 5;
    static final int MSG_HIDE_MY_TAG_ICON = 6;
    static final int MSG_MOCK_NDEF = 7;
    static final int MSG_SE_FIELD_ACTIVATED = 8;
    static final int MSG_SE_FIELD_DEACTIVATED = 9;
    static final int MSG_SE_APDU_RECEIVED = 10;
    static final int MSG_SE_EMV_CARD_REMOVAL = 11;
    static final int MSG_SE_MIFARE_ACCESS = 12;

    static final int STATUS_CODE_TARGET_LOST = 146;

    // Copied from com.android.nfc_extras to avoid library dependency
    // Must keep in sync with com.android.nfc_extras
    static final int ROUTE_OFF = 1;
    static final int ROUTE_ON_WHEN_SCREEN_ON = 2;
    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";
    public static final String ACTION_AID_SELECTED =
        "com.android.nfc_extras.action.AID_SELECTED";
    public static final String EXTRA_AID = "com.android.nfc_extras.extra.AID";

    public static final String ACTION_APDU_RECEIVED =
        "com.android.nfc_extras.action.APDU_RECEIVED";
    public static final String EXTRA_APDU_BYTES =
        "com.android.nfc_extras.extra.APDU_BYTES";

    public static final String ACTION_EMV_CARD_REMOVAL =
        "com.android.nfc_extras.action.EMV_CARD_REMOVAL";

    public static final String ACTION_MIFARE_ACCESS_DETECTED =
        "com.android.nfc_extras.action.MIFARE_ACCESS_DETECTED";
    public static final String EXTRA_MIFARE_BLOCK =
        "com.android.nfc_extras.extra.MIFARE_BLOCK";

    // Locked on mNfcAdapter
    PendingIntent mDispatchOverrideIntent;
    IntentFilter[] mDispatchOverrideFilters;
    String[][] mDispatchOverrideTechLists;

    // TODO: none of these appear to be synchronized but are
    // read/written from different threads (notably Binder threads)...
    private int mGeneratedSocketHandle = 0;
    private volatile boolean mIsNfcEnabled = false;
    private boolean mIsDiscoveryOn = false;

    // NFC Execution Environment
    // fields below are protected by this
    private static final int SECURE_ELEMENT_ID = 11259375;  //TODO: remove hard-coded value
    private NativeNfcSecureElement mSecureElement;
    private OpenSecureElement mOpenEe;  // null when EE closed
    private int mEeRoutingState;  // contactless interface routing

    // fields below are used in multiple threads and protected by synchronized(this)
    private final HashMap<Integer, Object> mObjectMap = new HashMap<Integer, Object>();
    private final HashMap<Integer, Object> mSocketMap = new HashMap<Integer, Object>();
    private boolean mScreenOn;
    private HashSet<String> mSePackages = new HashSet<String>();

    // fields below are final after onCreate()
    Context mContext;
    private NativeNfcManager mManager;
    private SharedPreferences mPrefs;
    private SharedPreferences.Editor mPrefsEditor;
    private PowerManager.WakeLock mWakeLock;
    private IActivityManager mIActivityManager;
    NdefPushClient mNdefPushClient;
    NdefPushServer mNdefPushServer;
    RegisteredComponentCache mTechListFilters;

    private static NfcService sService;

    public static void enforceAdminPerm(Context context) {
        int admin = context.checkCallingOrSelfPermission(ADMIN_PERM);
        int nfcee = context.checkCallingOrSelfPermission(NFCEE_ADMIN_PERM);
        if (admin != PackageManager.PERMISSION_GRANTED
                && nfcee != PackageManager.PERMISSION_GRANTED) {
            throw new SecurityException(ADMIN_PERM_ERROR);
        }
    }

    public static void enforceNfceeAdminPerm(Context context) {
        context.enforceCallingOrSelfPermission(NFCEE_ADMIN_PERM, NFCEE_ADMIN_PERM_ERROR);
    }

    public static NfcService getInstance() {
        return sService;
    }

    @Override
    public void onCreate() {
        super.onCreate();

        Log.i(TAG, "Starting NFC service");

        sService = this;

        mContext = this;
        mManager = new NativeNfcManager(mContext, this);
        mManager.initializeNativeStructure();

        mNdefPushClient = new NdefPushClient(this);
        mNdefPushServer = new NdefPushServer();

        mTechListFilters = new RegisteredComponentCache(this,
                NfcAdapter.ACTION_TECH_DISCOVERED, NfcAdapter.ACTION_TECH_DISCOVERED);

        mSecureElement = new NativeNfcSecureElement();
        mEeRoutingState = ROUTE_OFF;

        mPrefs = mContext.getSharedPreferences(PREF, Context.MODE_PRIVATE);
        mPrefsEditor = mPrefs.edit();

        mIsNfcEnabled = false;  // real preference read later

        PowerManager pm = (PowerManager)getSystemService(Context.POWER_SERVICE);
        mScreenOn = pm.isScreenOn();
        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "NfcService");

        mIActivityManager = ActivityManagerNative.getDefault();

        ServiceManager.addService(SERVICE_NAME, mNfcAdapter);

        IntentFilter filter = new IntentFilter(NativeNfcManager.INTERNAL_TARGET_DESELECTED_ACTION);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        filter.addAction(Intent.ACTION_SCREEN_ON);
        filter.addAction(ACTION_MASTER_CLEAR_NOTIFICATION);
        mContext.registerReceiver(mReceiver, filter);

        filter = new IntentFilter();
        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
        filter.addDataScheme("package");

        mContext.registerReceiver(mReceiver, filter);

        Thread t = new Thread() {
            @Override
            public void run() {
                Log.d(TAG,"checking on firmware download");
                boolean nfc_on = mPrefs.getBoolean(PREF_NFC_ON, NFC_ON_DEFAULT);
                if (nfc_on) {
                    Log.d(TAG,"NFC is on. Doing normal stuff");
                    _enable(false, true);
                } else {
                    Log.d(TAG,"NFC is off.  Checking firmware version");
                    _maybeUpdateFirmware();
                }
                resetSeOnFirstBoot();
            }
        };
        t.start();
    }

    @Override
    public void onTerminate() {
        super.onTerminate();
        // NFC application is persistent, it should not be destroyed by framework
        Log.wtf(TAG, "NFC service is under attack!");
    }

    private final INfcAdapter.Stub mNfcAdapter = new INfcAdapter.Stub() {
        /** Protected by "this" */
        NdefMessage mLocalMessage = null;

        @Override
        public boolean enable() throws RemoteException {
            NfcService.enforceAdminPerm(mContext);

            boolean isSuccess = false;
            boolean previouslyEnabled = isEnabled();
            if (!previouslyEnabled) {
                reset();
                isSuccess = _enable(previouslyEnabled, true);
            }
            return isSuccess;
        }

        @Override
        public boolean disable() throws RemoteException {
            boolean isSuccess = false;
            NfcService.enforceAdminPerm(mContext);
            boolean previouslyEnabled = isEnabled();
            if (DBG) Log.d(TAG, "Disabling NFC.  previous=" + previouslyEnabled);

            if (previouslyEnabled) {
                isSuccess = _disable(previouslyEnabled, true);
            }
            return isSuccess;
        }

        @Override
        public void enableForegroundDispatch(ComponentName activity, PendingIntent intent,
                IntentFilter[] filters, TechListParcel techListsParcel) {
            // Permission check
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            // Argument validation
            if (activity == null || intent == null) {
                throw new IllegalArgumentException();
            }

            // 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();
            }

            synchronized (this) {
                if (mDispatchOverrideIntent != null) {
                    Log.e(TAG, "Replacing active dispatch overrides");
                }
                mDispatchOverrideIntent = intent;
                mDispatchOverrideFilters = filters;
                mDispatchOverrideTechLists = techLists;
            }
        }

        @Override
        public void disableForegroundDispatch(ComponentName activity) {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            synchronized (this) {
                if (mDispatchOverrideIntent == null) {
                    Log.e(TAG, "No active foreground dispatching");
                }
                mDispatchOverrideIntent = null;
                mDispatchOverrideFilters = null;
            }
        }

        @Override
        public void enableForegroundNdefPush(ComponentName activity, NdefMessage msg) {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            if (activity == null || msg == null) {
                throw new IllegalArgumentException();
            }
            if (mNdefPushClient.setForegroundMessage(msg)) {
                Log.e(TAG, "Replacing active NDEF push message");
            }
        }

        @Override
        public void disableForegroundNdefPush(ComponentName activity) {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            if (!mNdefPushClient.setForegroundMessage(null)) {
                Log.e(TAG, "No active foreground NDEF push message");
            }
        }

        @Override
        public int createLlcpConnectionlessSocket(int sap) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* Check SAP is not already used */

            /* Store the socket handle */
            int sockeHandle = mGeneratedSocketHandle;
            NativeLlcpConnectionlessSocket socket;

            socket = mManager.doCreateLlcpConnectionlessSocket(sap);
            if (socket != null) {
                synchronized(NfcService.this) {
                    /* update socket handle generation */
                    mGeneratedSocketHandle++;

                    /* Add the socket into the socket map */
                    mSocketMap.put(mGeneratedSocketHandle, socket);
                   return mGeneratedSocketHandle;
                }
            } else {
                /* Get Error Status */
                int errorStatus = mManager.doGetLastError();

                switch (errorStatus) {
                    case ErrorCodes.ERROR_BUFFER_TO_SMALL:
                        return ErrorCodes.ERROR_BUFFER_TO_SMALL;
                    case ErrorCodes.ERROR_INSUFFICIENT_RESOURCES:
                        return ErrorCodes.ERROR_INSUFFICIENT_RESOURCES;
                    default:
                        return ErrorCodes.ERROR_SOCKET_CREATION;
                }
            }
        }

        @Override
        public int createLlcpServiceSocket(int sap, String sn, int miu, int rw, int linearBufferLength)
                throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            NativeLlcpServiceSocket socket;

            socket = mManager.doCreateLlcpServiceSocket(sap, sn, miu, rw, linearBufferLength);
            if (socket != null) {
                synchronized(NfcService.this) {
                    /* update socket handle generation */
                    mGeneratedSocketHandle++;

                    /* Add the socket into the socket map */
                    mSocketMap.put(mGeneratedSocketHandle, socket);
                   return mGeneratedSocketHandle;
                }
            } else {
                /* Get Error Status */
                int errorStatus = mManager.doGetLastError();

                switch (errorStatus) {
                    case ErrorCodes.ERROR_BUFFER_TO_SMALL:
                        return ErrorCodes.ERROR_BUFFER_TO_SMALL;
                    case ErrorCodes.ERROR_INSUFFICIENT_RESOURCES:
                        return ErrorCodes.ERROR_INSUFFICIENT_RESOURCES;
                    default:
                        return ErrorCodes.ERROR_SOCKET_CREATION;
                }
            }
        }

        @Override
        public int createLlcpSocket(int sap, int miu, int rw, int linearBufferLength)
                throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            if (DBG) Log.d(TAG, "creating llcp socket");
            NativeLlcpSocket socket;

            socket = mManager.doCreateLlcpSocket(sap, miu, rw, linearBufferLength);

            if (socket != null) {
                synchronized(NfcService.this) {
                    /* update socket handle generation */
                    mGeneratedSocketHandle++;

                    /* Add the socket into the socket map */
                    mSocketMap.put(mGeneratedSocketHandle, socket);
                   return mGeneratedSocketHandle;
                }
            } else {
                /* Get Error Status */
                int errorStatus = mManager.doGetLastError();

                Log.d(TAG, "failed to create llcp socket: " + ErrorCodes.asString(errorStatus));

                switch (errorStatus) {
                    case ErrorCodes.ERROR_BUFFER_TO_SMALL:
                        return ErrorCodes.ERROR_BUFFER_TO_SMALL;
                    case ErrorCodes.ERROR_INSUFFICIENT_RESOURCES:
                        return ErrorCodes.ERROR_INSUFFICIENT_RESOURCES;
                    default:
                        return ErrorCodes.ERROR_SOCKET_CREATION;
                }
            }
        }

        @Override
        public ILlcpConnectionlessSocket getLlcpConnectionlessInterface() throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            return mLlcpConnectionlessSocketService;
        }

        @Override
        public ILlcpSocket getLlcpInterface() throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            return mLlcpSocket;
        }

        @Override
        public ILlcpServiceSocket getLlcpServiceInterface() throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            return mLlcpServerSocketService;
        }

        @Override
        public INfcTag getNfcTagInterface() throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            return mNfcTagService;
        }

        @Override
        public IP2pInitiator getP2pInitiatorInterface() throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            return mP2pInitiatorService;
        }

        @Override
        public IP2pTarget getP2pTargetInterface() throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);
            return mP2pTargetService;
        }

        @Override
        public INfcAdapterExtras getNfcAdapterExtrasInterface() {
            NfcService.enforceNfceeAdminPerm(mContext);
            return mExtrasService;
        }

        @Override
        public String getProperties(String param) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            if (param == null) {
                return null;
            }

            if (param.equals(PROPERTY_LLCP_LTO_VALUE)) {
                return Integer.toString(mPrefs.getInt(PREF_LLCP_LTO, LLCP_LTO_DEFAULT));
            } else if (param.equals(PROPERTY_LLCP_MIU_VALUE)) {
                return Integer.toString(mPrefs.getInt(PREF_LLCP_MIU, LLCP_MIU_DEFAULT));
            } else if (param.equals(PROPERTY_LLCP_WKS_VALUE)) {
                return Integer.toString(mPrefs.getInt(PREF_LLCP_WKS, LLCP_WKS_DEFAULT));
            } else if (param.equals(PROPERTY_LLCP_OPT_VALUE)) {
                return Integer.toString(mPrefs.getInt(PREF_LLCP_OPT, LLCP_OPT_DEFAULT));
            } else if (param.equals(PROPERTY_NFC_DISCOVERY_A_VALUE)) {
                return Boolean.toString(mPrefs.getBoolean(PREF_DISCOVERY_A, DISCOVERY_A_DEFAULT));
            } else if (param.equals(PROPERTY_NFC_DISCOVERY_B_VALUE)) {
                return Boolean.toString(mPrefs.getBoolean(PREF_DISCOVERY_B, DISCOVERY_B_DEFAULT));
            } else if (param.equals(PROPERTY_NFC_DISCOVERY_F_VALUE)) {
                return Boolean.toString(mPrefs.getBoolean(PREF_DISCOVERY_F, DISCOVERY_F_DEFAULT));
            } else if (param.equals(PROPERTY_NFC_DISCOVERY_NFCIP_VALUE)) {
                return Boolean.toString(mPrefs.getBoolean(PREF_DISCOVERY_NFCIP, DISCOVERY_NFCIP_DEFAULT));
            } else if (param.equals(PROPERTY_NFC_DISCOVERY_15693_VALUE)) {
                return Boolean.toString(mPrefs.getBoolean(PREF_DISCOVERY_15693, DISCOVERY_15693_DEFAULT));
            } else {
                return "Unknown property";
            }
        }

        @Override
        public boolean isEnabled() throws RemoteException {
            return mIsNfcEnabled;
        }

        @Override
        public int setProperties(String param, String value) throws RemoteException {
            NfcService.enforceAdminPerm(mContext);

            if (isEnabled()) {
                return ErrorCodes.ERROR_NFC_ON;
            }

            int val;

            /* Check params validity */
            if (param == null || value == null) {
                return ErrorCodes.ERROR_INVALID_PARAM;
            }

            if (param.equals(PROPERTY_LLCP_LTO_VALUE)) {
                val = Integer.parseInt(value);

                /* Check params */
                if (val > LLCP_LTO_MAX)
                    return ErrorCodes.ERROR_INVALID_PARAM;

                /* Store value */
                mPrefsEditor.putInt(PREF_LLCP_LTO, val);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_LLCP_LTO, val);

            } else if (param.equals(PROPERTY_LLCP_MIU_VALUE)) {
                val = Integer.parseInt(value);

                /* Check params */
                if ((val < LLCP_MIU_DEFAULT) || (val > LLCP_MIU_MAX))
                    return ErrorCodes.ERROR_INVALID_PARAM;

                /* Store value */
                mPrefsEditor.putInt(PREF_LLCP_MIU, val);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_LLCP_MIU, val);

            } else if (param.equals(PROPERTY_LLCP_WKS_VALUE)) {
                val = Integer.parseInt(value);

                /* Check params */
                if (val > LLCP_WKS_MAX)
                    return ErrorCodes.ERROR_INVALID_PARAM;

                /* Store value */
                mPrefsEditor.putInt(PREF_LLCP_WKS, val);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_LLCP_WKS, val);

            } else if (param.equals(PROPERTY_LLCP_OPT_VALUE)) {
                val = Integer.parseInt(value);

                /* Check params */
                if (val > LLCP_OPT_MAX)
                    return ErrorCodes.ERROR_INVALID_PARAM;

                /* Store value */
                mPrefsEditor.putInt(PREF_LLCP_OPT, val);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_LLCP_OPT, val);

            } else if (param.equals(PROPERTY_NFC_DISCOVERY_A_VALUE)) {
                boolean b = Boolean.parseBoolean(value);

                /* Store value */
                mPrefsEditor.putBoolean(PREF_DISCOVERY_A, b);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_NFC_DISCOVERY_A, b ? 1 : 0);

            } else if (param.equals(PROPERTY_NFC_DISCOVERY_B_VALUE)) {
                boolean b = Boolean.parseBoolean(value);

                /* Store value */
                mPrefsEditor.putBoolean(PREF_DISCOVERY_B, b);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_NFC_DISCOVERY_B, b ? 1 : 0);

            } else if (param.equals(PROPERTY_NFC_DISCOVERY_F_VALUE)) {
                boolean b = Boolean.parseBoolean(value);

                /* Store value */
                mPrefsEditor.putBoolean(PREF_DISCOVERY_F, b);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_NFC_DISCOVERY_F, b ? 1 : 0);

            } else if (param.equals(PROPERTY_NFC_DISCOVERY_15693_VALUE)) {
                boolean b = Boolean.parseBoolean(value);

                /* Store value */
                mPrefsEditor.putBoolean(PREF_DISCOVERY_15693, b);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_NFC_DISCOVERY_15693, b ? 1 : 0);

            } else if (param.equals(PROPERTY_NFC_DISCOVERY_NFCIP_VALUE)) {
                boolean b = Boolean.parseBoolean(value);

                /* Store value */
                mPrefsEditor.putBoolean(PREF_DISCOVERY_NFCIP, b);
                mPrefsEditor.apply();

                /* Update JNI */
                mManager.doSetProperties(PROPERTY_NFC_DISCOVERY_NFCIP, b ? 1 : 0);

            } else {
                return ErrorCodes.ERROR_INVALID_PARAM;
            }

            return ErrorCodes.SUCCESS;
        }

        @Override
        public NdefMessage localGet() throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            synchronized (this) {
                return mLocalMessage;
            }
        }

        @Override
        public void localSet(NdefMessage message) throws RemoteException {
            NfcService.enforceAdminPerm(mContext);

            synchronized (this) {
                mLocalMessage = message;
                Context context = NfcService.this.getApplicationContext();

                // Send a message to the UI thread to show or hide the icon so the requests are
                // serialized and the icon can't get out of sync with reality.
                if (message != null) {
                    FileOutputStream out = null;

                    try {
                        out = context.openFileOutput(MY_TAG_FILE_NAME, Context.MODE_PRIVATE);
                        byte[] bytes = message.toByteArray();
                        if (bytes.length == 0) {
                            Log.w(TAG, "Setting a empty mytag");
                        }

                        out.write(bytes);
                    } catch (IOException e) {
                        Log.e(TAG, "Could not write mytag file", e);
                    } finally {
                        try {
                            if (out != null) {
                                out.flush();
                                out.close();
                            }
                        } catch (IOException e) {
                            // Ignore
                        }
                    }

                    // Only show the icon if NFC is enabled.
                    if (mIsNfcEnabled) {
                        sendMessage(MSG_SHOW_MY_TAG_ICON, null);
                    }
                } else {
                    context.deleteFile(MY_TAG_FILE_NAME);
                    sendMessage(MSG_HIDE_MY_TAG_ICON, null);
                }
            }
        }
    };

    private final ILlcpSocket mLlcpSocket = new ILlcpSocket.Stub() {

        private NativeLlcpSocket findSocket(int nativeHandle) {
            Object socket = NfcService.this.findSocket(nativeHandle);
            if (!(socket instanceof NativeLlcpSocket)) {
                return null;
            }
            return (NativeLlcpSocket) socket;
        }

        @Override
        public int close(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                socket.doClose();
                /* Remove the socket closed from the hmap */
                RemoveSocket(nativeHandle);
                return ErrorCodes.SUCCESS;
            } else {
                return ErrorCodes.ERROR_IO;
            }
        }

        @Override
        public int connect(int nativeHandle, int sap) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;
            boolean isSuccess = false;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                isSuccess = socket.doConnect(sap);
                if (isSuccess) {
                    return ErrorCodes.SUCCESS;
                } else {
                    return ErrorCodes.ERROR_IO;
                }
            } else {
                return ErrorCodes.ERROR_IO;
            }

        }

        @Override
        public int connectByName(int nativeHandle, String sn) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;
            boolean isSuccess = false;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                isSuccess = socket.doConnectBy(sn);
                if (isSuccess) {
                    return ErrorCodes.SUCCESS;
                } else {
                    return ErrorCodes.ERROR_IO;
                }
            } else {
                return ErrorCodes.ERROR_IO;
            }

        }

        @Override
        public int getLocalSap(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                return socket.getSap();
            } else {
                return 0;
            }
        }

        @Override
        public int getLocalSocketMiu(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                return socket.getMiu();
            } else {
                return 0;
            }
        }

        @Override
        public int getLocalSocketRw(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                return socket.getRw();
            } else {
                return 0;
            }
        }

        @Override
        public int getRemoteSocketMiu(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                if (socket.doGetRemoteSocketMiu() != 0) {
                    return socket.doGetRemoteSocketMiu();
                } else {
                    return ErrorCodes.ERROR_SOCKET_NOT_CONNECTED;
                }
            } else {
                return ErrorCodes.ERROR_SOCKET_NOT_CONNECTED;
            }
        }

        @Override
        public int getRemoteSocketRw(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                if (socket.doGetRemoteSocketRw() != 0) {
                    return socket.doGetRemoteSocketRw();
                } else {
                    return ErrorCodes.ERROR_SOCKET_NOT_CONNECTED;
                }
            } else {
                return ErrorCodes.ERROR_SOCKET_NOT_CONNECTED;
            }
        }

        @Override
        public int receive(int nativeHandle, byte[] receiveBuffer) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                return socket.doReceive(receiveBuffer);
            } else {
                return 0;
            }
        }

        @Override
        public int send(int nativeHandle, byte[] data) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpSocket socket = null;
            boolean isSuccess = false;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                isSuccess = socket.doSend(data);
                if (isSuccess) {
                    return ErrorCodes.SUCCESS;
                } else {
                    return ErrorCodes.ERROR_IO;
                }
            } else {
                return ErrorCodes.ERROR_IO;
            }
        }
    };

    private final ILlcpServiceSocket mLlcpServerSocketService = new ILlcpServiceSocket.Stub() {

        private NativeLlcpServiceSocket findSocket(int nativeHandle) {
            Object socket = NfcService.this.findSocket(nativeHandle);
            if (!(socket instanceof NativeLlcpServiceSocket)) {
                return null;
            }
            return (NativeLlcpServiceSocket) socket;
        }

        @Override
        public int accept(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpServiceSocket socket = null;
            NativeLlcpSocket clientSocket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

                /* find the socket in the hmap */
                socket = findSocket(nativeHandle);
                if (socket != null) {
                    clientSocket = socket.doAccept(socket.getMiu(),
                            socket.getRw(), socket.getLinearBufferLength());
                    if (clientSocket != null) {
                        /* Add the socket into the socket map */
                        synchronized(this) {
                            mGeneratedSocketHandle++;
                            mSocketMap.put(mGeneratedSocketHandle, clientSocket);
                            return mGeneratedSocketHandle;
                        }
                    } else {
                        return ErrorCodes.ERROR_IO;
                    }
                } else {
                    return ErrorCodes.ERROR_IO;
                }
        }

        @Override
        public void close(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpServiceSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                socket.doClose();
                synchronized (this) {
                    /* Remove the socket closed from the hmap */
                    RemoveSocket(nativeHandle);
                }
            }
        }
    };

    private final ILlcpConnectionlessSocket mLlcpConnectionlessSocketService = new ILlcpConnectionlessSocket.Stub() {

        private NativeLlcpConnectionlessSocket findSocket(int nativeHandle) {
            Object socket = NfcService.this.findSocket(nativeHandle);
            if (!(socket instanceof NativeLlcpConnectionlessSocket)) {
                return null;
            }
            return (NativeLlcpConnectionlessSocket) socket;
        }

        @Override
        public void close(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpConnectionlessSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                socket.doClose();
                /* Remove the socket closed from the hmap */
                RemoveSocket(nativeHandle);
            }
        }

        @Override
        public int getSap(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpConnectionlessSocket socket = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                return socket.getSap();
            } else {
                return 0;
            }
        }

        @Override
        public LlcpPacket receiveFrom(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpConnectionlessSocket socket = null;
            LlcpPacket packet;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return null;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                packet = socket.doReceiveFrom(socket.getLinkMiu());
                if (packet != null) {
                    return packet;
                }
                return null;
            } else {
                return null;
            }
        }

        @Override
        public int sendTo(int nativeHandle, LlcpPacket packet) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeLlcpConnectionlessSocket socket = null;
            boolean isSuccess = false;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the socket in the hmap */
            socket = findSocket(nativeHandle);
            if (socket != null) {
                isSuccess = socket.doSendTo(packet.getRemoteSap(), packet.getDataBuffer());
                if (isSuccess) {
                    return ErrorCodes.SUCCESS;
                } else {
                    return ErrorCodes.ERROR_IO;
                }
            } else {
                return ErrorCodes.ERROR_IO;
            }
        }
    };

    private final INfcTag mNfcTagService = new INfcTag.Stub() {

        @Override
        public int close(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeNfcTag tag = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the tag in the hmap */
            tag = (NativeNfcTag) findObject(nativeHandle);
            if (tag != null) {
                /* Remove the device from the hmap */
                unregisterObject(nativeHandle);
                tag.disconnect();
                return ErrorCodes.SUCCESS;
            }
            /* Restart polling loop for notification */
            applyRouting();
            return ErrorCodes.ERROR_DISCONNECT;
        }

        @Override
        public int connect(int nativeHandle, int technology) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeNfcTag tag = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the tag in the hmap */
            tag = (NativeNfcTag) findObject(nativeHandle);
            if (tag == null) {
                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) == 0) {
                return ErrorCodes.SUCCESS;
            } else {
                return ErrorCodes.ERROR_DISCONNECT;
            }
        }

        @Override
        public int reconnect(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            NativeNfcTag tag = null;

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return ErrorCodes.ERROR_NOT_INITIALIZED;
            }

            /* find the tag in the hmap */
            tag = (NativeNfcTag) findObject(nativeHandle);
            if (tag != null) {
                if (tag.reconnect() == 0) {
                    return ErrorCodes.SUCCESS;
                } else {
                    return ErrorCodes.ERROR_DISCONNECT;
                }
            }
            return ErrorCodes.ERROR_DISCONNECT;
        }

        @Override
        public int[] getTechList(int nativeHandle) throws RemoteException {
            mContext.enforceCallingOrSelfPermission(NFC_PERM, NFC_PERM_ERROR);

            // Check if NFC is enabled
            if (!mIsNfcEnabled) {
                return null;
            }

            /* find the tag in the hmap */
            NativeNfcTag tag = (NativeNfcTag) findObject(nativeHandle);
            if (tag != null) {
                return tag.getTechList();
        …

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