path: root/com/android/internal/telephony/uicc/IccRecords.java

/*
 * Copyright (C) 2006 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.internal.telephony.uicc;

import android.content.Context;
import android.os.AsyncResult;
import android.os.Handler;
import android.os.Message;
import android.os.Registrant;
import android.os.RegistrantList;
import android.telephony.Rlog;
import android.telephony.ServiceState;
import android.telephony.SubscriptionInfo;
import android.telephony.TelephonyManager;
import android.text.TextUtils;

import com.android.internal.telephony.CommandsInterface;

import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * {@hide}
 */
public abstract class IccRecords extends Handler implements IccConstants {
    protected static final boolean DBG = true;
    protected static final boolean VDBG = false; // STOPSHIP if true

    // ***** Instance Variables
    protected AtomicBoolean mDestroyed = new AtomicBoolean(false);
    protected AtomicBoolean mLoaded = new AtomicBoolean(false);
    protected Context mContext;
    protected CommandsInterface mCi;
    protected IccFileHandler mFh;
    protected UiccCardApplication mParentApp;
    protected TelephonyManager mTelephonyManager;

    protected RegistrantList mRecordsLoadedRegistrants = new RegistrantList();
    protected RegistrantList mLockedRecordsLoadedRegistrants = new RegistrantList();
    protected RegistrantList mNetworkLockedRecordsLoadedRegistrants = new RegistrantList();
    protected RegistrantList mImsiReadyRegistrants = new RegistrantList();
    protected RegistrantList mRecordsEventsRegistrants = new RegistrantList();
    protected RegistrantList mNewSmsRegistrants = new RegistrantList();
    protected RegistrantList mNetworkSelectionModeAutomaticRegistrants = new RegistrantList();
    protected RegistrantList mSpnUpdatedRegistrants = new RegistrantList();

    protected int mRecordsToLoad;  // number of pending load requests

    protected AdnRecordCache mAdnCache;

    // ***** Cached SIM State; cleared on channel close

    // SIM is not locked
    protected static final int LOCKED_RECORDS_REQ_REASON_NONE = 0;
    // Records requested for PIN or PUK locked SIM
    protected static final int LOCKED_RECORDS_REQ_REASON_LOCKED = 1;
    // Records requested for network locked SIM
    protected static final int LOCKED_RECORDS_REQ_REASON_NETWORK_LOCKED = 2;

    protected boolean mRecordsRequested = false; // true if we've made requests for the sim records
    protected int mLockedRecordsReqReason = LOCKED_RECORDS_REQ_REASON_NONE;

    protected String mIccId;  // Includes only decimals (no hex)
    protected String mFakeIccId;

    protected String mFullIccId;  // Includes hex characters in ICCID
    protected String mMsisdn = null;  // My mobile number
    protected String mMsisdnTag = null;
    protected String mNewMsisdn = null;
    protected String mNewMsisdnTag = null;
    protected String mVoiceMailNum = null;
    protected String mVoiceMailTag = null;
    protected String mNewVoiceMailNum = null;
    protected String mNewVoiceMailTag = null;
    protected boolean mIsVoiceMailFixed = false;
    protected String mImsi;
    protected String mFakeImsi;
    private IccIoResult auth_rsp;

    protected int mMncLength = UNINITIALIZED;
    protected int mMailboxIndex = 0; // 0 is no mailbox dailing number associated

    private String mSpn;
    private String mFakeSpn;

    protected String mGid1;
    protected String mFakeGid1;
    protected String mGid2;
    protected String mFakeGid2;

    protected String mPnnHomeName;
    protected String mFakePnnHomeName;

    protected String mPrefLang;

    protected PlmnActRecord[] mHplmnActRecords;
    protected PlmnActRecord[] mOplmnActRecords;
    protected PlmnActRecord[] mPlmnActRecords;

    protected String[] mEhplmns;
    protected String[] mFplmns;

    private final Object mLock = new Object();

    CarrierTestOverride mCarrierTestOverride;

    //Arbitrary offset for the Handler
    protected static final int HANDLER_ACTION_BASE = 0x12E500;
    protected static final int HANDLER_ACTION_NONE = HANDLER_ACTION_BASE + 0;
    protected static final int HANDLER_ACTION_SEND_RESPONSE = HANDLER_ACTION_BASE + 1;
    protected static AtomicInteger sNextRequestId = new AtomicInteger(1);
    protected final HashMap<Integer, Message> mPendingResponses = new HashMap<>();

    // ***** Constants

    // Markers for mncLength
    protected static final int UNINITIALIZED = -1;
    protected static final int UNKNOWN = 0;

    // Bitmasks for SPN display rules.
    public static final int SPN_RULE_SHOW_SPN  = 0x01;
    public static final int SPN_RULE_SHOW_PLMN = 0x02;

    // ***** Event Constants
    public static final int EVENT_MWI = 0; // Message Waiting indication
    public static final int EVENT_CFI = 1; // Call Forwarding indication
    public static final int EVENT_SPN = 2; // Service Provider Name

    public static final int EVENT_GET_ICC_RECORD_DONE = 100;
    public static final int EVENT_REFRESH = 31; // ICC refresh occurred
    protected static final int EVENT_APP_READY = 1;
    private static final int EVENT_AKA_AUTHENTICATE_DONE          = 90;

    public static final int CALL_FORWARDING_STATUS_DISABLED = 0;
    public static final int CALL_FORWARDING_STATUS_ENABLED = 1;
    public static final int CALL_FORWARDING_STATUS_UNKNOWN = -1;

    public static final int DEFAULT_VOICE_MESSAGE_COUNT = -2;
    public static final int UNKNOWN_VOICE_MESSAGE_COUNT = -1;

    @Override
    public String toString() {
        String iccIdToPrint = SubscriptionInfo.givePrintableIccid(mFullIccId);
        return "mDestroyed=" + mDestroyed
                + " mContext=" + mContext
                + " mCi=" + mCi
                + " mFh=" + mFh
                + " mParentApp=" + mParentApp
                + " recordsToLoad=" + mRecordsToLoad
                + " adnCache=" + mAdnCache
                + " recordsRequested=" + mRecordsRequested
                + " lockedRecordsReqReason=" + mLockedRecordsReqReason
                + " iccid=" + iccIdToPrint
                + (mCarrierTestOverride.isInTestMode() ? "mFakeIccid=" + mFakeIccId : "")
                + " msisdnTag=" + mMsisdnTag
                + " voiceMailNum=" + Rlog.pii(VDBG, mVoiceMailNum)
                + " voiceMailTag=" + mVoiceMailTag
                + " voiceMailNum=" + Rlog.pii(VDBG, mNewVoiceMailNum)
                + " newVoiceMailTag=" + mNewVoiceMailTag
                + " isVoiceMailFixed=" + mIsVoiceMailFixed
                + " mImsi=" + ((mImsi != null) ?
                mImsi.substring(0, 6) + Rlog.pii(VDBG, mImsi.substring(6)) : "null")
                + (mCarrierTestOverride.isInTestMode() ? " mFakeImsi=" + mFakeImsi : "")
                + " mncLength=" + mMncLength
                + " mailboxIndex=" + mMailboxIndex
                + " spn=" + mSpn
                + (mCarrierTestOverride.isInTestMode() ? " mFakeSpn=" + mFakeSpn : "");
    }

    /**
     * Generic ICC record loaded callback. Subclasses can call EF load methods on
     * {@link IccFileHandler} passing a Message for onLoaded with the what field set to
     * {@link #EVENT_GET_ICC_RECORD_DONE} and the obj field set to an instance
     * of this interface. The {@link #handleMessage} method in this class will print a
     * log message using {@link #getEfName()} and decrement {@link #mRecordsToLoad}.
     *
     * If the record load was successful, {@link #onRecordLoaded} will be called with the result.
     * Otherwise, an error log message will be output by {@link #handleMessage} and
     * {@link #onRecordLoaded} will not be called.
     */
    public interface IccRecordLoaded {
        String getEfName();
        void onRecordLoaded(AsyncResult ar);
    }

    // ***** Constructor
    public IccRecords(UiccCardApplication app, Context c, CommandsInterface ci) {
        mContext = c;
        mCi = ci;
        mFh = app.getIccFileHandler();
        mParentApp = app;
        mTelephonyManager = (TelephonyManager) mContext.getSystemService(
                Context.TELEPHONY_SERVICE);

        mCarrierTestOverride = new CarrierTestOverride();

        if (mCarrierTestOverride.isInTestMode()) {
            mFakeImsi = mCarrierTestOverride.getFakeIMSI();
            log("load mFakeImsi: " + mFakeImsi);

            mFakeGid1 = mCarrierTestOverride.getFakeGid1();
            log("load mFakeGid1: " + mFakeGid1);

            mFakeGid2 = mCarrierTestOverride.getFakeGid2();
            log("load mFakeGid2: " + mFakeGid2);

            mFakeSpn = mCarrierTestOverride.getFakeSpn();
            log("load mFakeSpn: " + mFakeSpn);

            mFakePnnHomeName = mCarrierTestOverride.getFakePnnHomeName();
            log("load mFakePnnHomeName: " + mFakePnnHomeName);

            mFakeIccId = mCarrierTestOverride.getFakeIccid();
            log("load mFakeIccId: " + mFakeIccId);
        }
        mCi.registerForIccRefresh(this, EVENT_REFRESH, null);
    }

    /**
     * Call when the IccRecords object is no longer going to be used.
     */
    public void dispose() {
        mDestroyed.set(true);

        // It is possible that there is another thread waiting for the response
        // to requestIccSimAuthentication() in getIccSimChallengeResponse().
        auth_rsp = null;
        synchronized (mLock) {
            mLock.notifyAll();
        }

        mCi.unregisterForIccRefresh(this);
        mParentApp = null;
        mFh = null;
        mCi = null;
        mContext = null;
        if (mAdnCache != null) {
            mAdnCache.reset();
        }
        mLoaded.set(false);
    }

    public abstract void onReady();

    //***** Public Methods
    public AdnRecordCache getAdnCache() {
        return mAdnCache;
    }

    /**
     * Adds a message to the pending requests list by generating a unique
     * (integer) hash key and returning it. The message should never be null.
     */
    public int storePendingResponseMessage(Message msg) {
        int key = sNextRequestId.getAndIncrement();
        synchronized (mPendingResponses) {
            mPendingResponses.put(key, msg);
        }
        return key;
    }

    /**
     * Returns the pending request, if any or null
     */
    public Message retrievePendingResponseMessage(Integer key) {
        Message m;
        synchronized (mPendingResponses) {
            return mPendingResponses.remove(key);
        }
    }

    /**
     * Returns the ICC ID stripped at the first hex character. Some SIMs have ICC IDs
     * containing hex digits; {@link #getFullIccId()} should be used to get the full ID including
     * hex digits.
     * @return ICC ID without hex digits
     */
    public String getIccId() {
        if (mCarrierTestOverride.isInTestMode() && mFakeIccId != null) {
            return mFakeIccId;
        } else {
            return mIccId;
        }
    }

    /**
     * Returns the full ICC ID including hex digits.
     * @return full ICC ID including hex digits
     */
    public String getFullIccId() {
        return mFullIccId;
    }

    public void registerForRecordsLoaded(Handler h, int what, Object obj) {
        if (mDestroyed.get()) {
            return;
        }

        Registrant r = new Registrant(h, what, obj);
        mRecordsLoadedRegistrants.add(r);

        if (getRecordsLoaded()) {
            r.notifyRegistrant(new AsyncResult(null, null, null));
        }
    }
    public void unregisterForRecordsLoaded(Handler h) {
        mRecordsLoadedRegistrants.remove(h);
    }

    /**
     * Register to be notified when records are loaded for a PIN or PUK locked SIM
     */
    public void registerForLockedRecordsLoaded(Handler h, int what, Object obj) {
        if (mDestroyed.get()) {
            return;
        }

        Registrant r = new Registrant(h, what, obj);
        mLockedRecordsLoadedRegistrants.add(r);

        if (getLockedRecordsLoaded()) {
            r.notifyRegistrant(new AsyncResult(null, null, null));
        }
    }

    /**
     * Unregister corresponding to registerForLockedRecordsLoaded()
     */
    public void unregisterForLockedRecordsLoaded(Handler h) {
        mLockedRecordsLoadedRegistrants.remove(h);
    }

    /**
     * Register to be notified when records are loaded for a network locked SIM
     */
    public void registerForNetworkLockedRecordsLoaded(Handler h, int what, Object obj) {
        if (mDestroyed.get()) {
            return;
        }

        Registrant r = new Registrant(h, what, obj);
        mNetworkLockedRecordsLoadedRegistrants.add(r);

        if (getNetworkLockedRecordsLoaded()) {
            r.notifyRegistrant(new AsyncResult(null, null, null));
        }
    }

    /**
     * Unregister corresponding to registerForLockedRecordsLoaded()
     */
    public void unregisterForNetworkLockedRecordsLoaded(Handler h) {
        mNetworkLockedRecordsLoadedRegistrants.remove(h);
    }

    public void registerForImsiReady(Handler h, int what, Object obj) {
        if (mDestroyed.get()) {
            return;
        }

        Registrant r = new Registrant(h, what, obj);
        mImsiReadyRegistrants.add(r);

        if (getIMSI() != null) {
            r.notifyRegistrant(new AsyncResult(null, null, null));
        }
    }
    public void unregisterForImsiReady(Handler h) {
        mImsiReadyRegistrants.remove(h);
    }

    public void registerForSpnUpdate(Handler h, int what, Object obj) {
        if (mDestroyed.get()) {
            return;
        }

        Registrant r = new Registrant(h, what, obj);
        mSpnUpdatedRegistrants.add(r);

        if (!TextUtils.isEmpty(mSpn)) {
            r.notifyRegistrant(new AsyncResult(null, null, null));
        }
    }
    public void unregisterForSpnUpdate(Handler h) {
        mSpnUpdatedRegistrants.remove(h);
    }

    public void registerForRecordsEvents(Handler h, int what, Object obj) {
        Registrant r = new Registrant (h, what, obj);
        mRecordsEventsRegistrants.add(r);

        /* Notify registrant of all the possible events. This is to make sure registrant is
        notified even if event occurred in the past. */
        r.notifyResult(EVENT_MWI);
        r.notifyResult(EVENT_CFI);
    }
    public void unregisterForRecordsEvents(Handler h) {
        mRecordsEventsRegistrants.remove(h);
    }

    public void registerForNewSms(Handler h, int what, Object obj) {
        Registrant r = new Registrant (h, what, obj);
        mNewSmsRegistrants.add(r);
    }
    public void unregisterForNewSms(Handler h) {
        mNewSmsRegistrants.remove(h);
    }

    public void registerForNetworkSelectionModeAutomatic(
            Handler h, int what, Object obj) {
        Registrant r = new Registrant (h, what, obj);
        mNetworkSelectionModeAutomaticRegistrants.add(r);
    }
    public void unregisterForNetworkSelectionModeAutomatic(Handler h) {
        mNetworkSelectionModeAutomaticRegistrants.remove(h);
    }

    /**
     * Get the International Mobile Subscriber ID (IMSI) on a SIM
     * for GSM, UMTS and like networks. Default is null if IMSI is
     * not supported or unavailable.
     *
     * @return null if SIM is not yet ready or unavailable
     */
    public String getIMSI() {
        if (mCarrierTestOverride.isInTestMode() && mFakeImsi != null) {
            return mFakeImsi;
        } else {
            return mImsi;
        }
    }

    /**
     * Imsi could be set by ServiceStateTrackers in case of cdma
     * @param imsi
     */
    public void setImsi(String imsi) {
        mImsi = imsi;
        mImsiReadyRegistrants.notifyRegistrants();
    }

    /**
     * Get the Network Access ID (NAI) on a CSIM for CDMA like networks. Default is null if IMSI is
     * not supported or unavailable.
     *
     * @return null if NAI is not yet ready or unavailable
     */
    public String getNAI() {
        return null;
    }

    public String getMsisdnNumber() {
        return mMsisdn;
    }

    /**
     * Get the Group Identifier Level 1 (GID1) on a SIM for GSM.
     * @return null if SIM is not yet ready
     */
    public String getGid1() {
        if (mCarrierTestOverride.isInTestMode() && mFakeGid1 != null) {
            return mFakeGid1;
        } else {
            return mGid1;
        }
    }

    /**
     * Get the Group Identifier Level 2 (GID2) on a SIM.
     * @return null if SIM is not yet ready
     */
    public String getGid2() {
        if (mCarrierTestOverride.isInTestMode() && mFakeGid2 != null) {
            return mFakeGid2;
        } else {
            return mGid2;
        }
    }

    /**
     * Get the PLMN network name on a SIM.
     * @return null if SIM is not yet ready
     */
    public String getPnnHomeName() {
        if (mCarrierTestOverride.isInTestMode() && mFakePnnHomeName != null) {
            return mFakePnnHomeName;
        } else {
            return mPnnHomeName;
        }
    }

    public void setMsisdnNumber(String alphaTag, String number,
            Message onComplete) {
        loge("setMsisdn() should not be invoked on base IccRecords");
        // synthesize a "File Not Found" exception and return it
        AsyncResult.forMessage(onComplete).exception =
            (new IccIoResult(0x6A, 0x82, (byte[]) null)).getException();
        onComplete.sendToTarget();
    }

    public String getMsisdnAlphaTag() {
        return mMsisdnTag;
    }

    public String getVoiceMailNumber() {
        return mVoiceMailNum;
    }

    /**
     * Return Service Provider Name stored in SIM (EF_SPN=0x6F46) or in RUIM (EF_RUIM_SPN=0x6F41).
     *
     * @return null if SIM is not yet ready or no RUIM entry
     */
    public String getServiceProviderName() {
        if (mCarrierTestOverride.isInTestMode() && mFakeSpn != null) {
            return mFakeSpn;
        }
        String providerName = mSpn;

        // Check for null pointers, mParentApp can be null after dispose,
        // which did occur after removing a SIM.
        UiccCardApplication parentApp = mParentApp;
        if (parentApp != null) {
            UiccProfile profile = parentApp.getUiccProfile();
            if (profile != null) {
                String brandOverride = profile.getOperatorBrandOverride();
                if (brandOverride != null) {
                    log("getServiceProviderName: override, providerName=" + providerName);
                    providerName = brandOverride;
                } else {
                    log("getServiceProviderName: no brandOverride, providerName=" + providerName);
                }
            } else {
                log("getServiceProviderName: card is null, providerName=" + providerName);
            }
        } else {
            log("getServiceProviderName: mParentApp is null, providerName=" + providerName);
        }
        return providerName;
    }

    protected void setServiceProviderName(String spn) {
        if (!TextUtils.equals(mSpn, spn)) {
            mSpnUpdatedRegistrants.notifyRegistrants();
            mSpn = spn;
        }
    }

    /**
     * Set voice mail number to SIM record
     *
     * The voice mail number can be stored either in EF_MBDN (TS 51.011) or
     * EF_MAILBOX_CPHS (CPHS 4.2)
     *
     * If EF_MBDN is available, store the voice mail number to EF_MBDN
     *
     * If EF_MAILBOX_CPHS is enabled, store the voice mail number to EF_CHPS
     *
     * So the voice mail number will be stored in both EFs if both are available
     *
     * Return error only if both EF_MBDN and EF_MAILBOX_CPHS fail.
     *
     * When the operation is complete, onComplete will be sent to its handler
     *
     * @param alphaTag alpha-tagging of the dailing nubmer (upto 10 characters)
     * @param voiceNumber dailing nubmer (upto 20 digits)
     *        if the number is start with '+', then set to international TOA
     * @param onComplete
     *        onComplete.obj will be an AsyncResult
     *        ((AsyncResult)onComplete.obj).exception == null on success
     *        ((AsyncResult)onComplete.obj).exception != null on fail
     */
    public abstract void setVoiceMailNumber(String alphaTag, String voiceNumber,
            Message onComplete);

    public String getVoiceMailAlphaTag() {
        return mVoiceMailTag;
    }

    /**
     * Sets the SIM voice message waiting indicator records
     * @param line GSM Subscriber Profile Number, one-based. Only '1' is supported
     * @param countWaiting The number of messages waiting, if known. Use
     *                     -1 to indicate that an unknown number of
     *                      messages are waiting
     */
    public abstract void setVoiceMessageWaiting(int line, int countWaiting);

    /**
     * Called by GsmCdmaPhone to update VoiceMail count
     */
    public abstract int getVoiceMessageCount();

    /**
     * Called by STK Service when REFRESH is received.
     * @param fileChanged indicates whether any files changed
     * @param fileList if non-null, a list of EF files that changed
     */
    public abstract void onRefresh(boolean fileChanged, int[] fileList);

    public boolean getRecordsLoaded() {
        return mRecordsToLoad == 0 && mRecordsRequested;
    }

    protected boolean getLockedRecordsLoaded() {
        return mRecordsToLoad == 0
                && mLockedRecordsReqReason == LOCKED_RECORDS_REQ_REASON_LOCKED;
    }

    protected boolean getNetworkLockedRecordsLoaded() {
        return mRecordsToLoad == 0
                && mLockedRecordsReqReason == LOCKED_RECORDS_REQ_REASON_NETWORK_LOCKED;
    }

    //***** Overridden from Handler
    @Override
    public void handleMessage(Message msg) {
        AsyncResult ar;

        switch (msg.what) {
            case EVENT_GET_ICC_RECORD_DONE:
                try {
                    ar = (AsyncResult) msg.obj;
                    IccRecordLoaded recordLoaded = (IccRecordLoaded) ar.userObj;
                    if (DBG) log(recordLoaded.getEfName() + " LOADED");

                    if (ar.exception != null) {
                        loge("Record Load Exception: " + ar.exception);
                    } else {
                        recordLoaded.onRecordLoaded(ar);
                    }
                }catch (RuntimeException exc) {
                    // I don't want these exceptions to be fatal
                    loge("Exception parsing SIM record: " + exc);
                } finally {
                    // Count up record load responses even if they are fails
                    onRecordLoaded();
                }
                break;

            case EVENT_REFRESH:
                ar = (AsyncResult)msg.obj;
                if (DBG) log("Card REFRESH occurred: ");
                if (ar.exception == null) {
                    handleRefresh((IccRefreshResponse)ar.result);
                } else {
                    loge("Icc refresh Exception: " + ar.exception);
                }
                break;

            case EVENT_AKA_AUTHENTICATE_DONE:
                ar = (AsyncResult)msg.obj;
                auth_rsp = null;
                if (DBG) log("EVENT_AKA_AUTHENTICATE_DONE");
                if (ar.exception != null) {
                    loge("Exception ICC SIM AKA: " + ar.exception);
                } else {
                    try {
                        auth_rsp = (IccIoResult)ar.result;
                        if (DBG) log("ICC SIM AKA: auth_rsp = " + auth_rsp);
                    } catch (Exception e) {
                        loge("Failed to parse ICC SIM AKA contents: " + e);
                    }
                }
                synchronized (mLock) {
                    mLock.notifyAll();
                }

                break;

            default:
                super.handleMessage(msg);
        }
    }

    /**
     * Returns the SIM language derived from the EF-LI and EF-PL sim records.
     */
    public String getSimLanguage() {
        return mPrefLang;
    }

    protected void setSimLanguage(byte[] efLi, byte[] efPl) {
        String[] locales = mContext.getAssets().getLocales();
        try {
            mPrefLang = findBestLanguage(efLi, locales);
        } catch (UnsupportedEncodingException uee) {
            log("Unable to parse EF-LI: " + Arrays.toString(efLi));
        }

        if (mPrefLang == null) {
            try {
                mPrefLang = findBestLanguage(efPl, locales);
            } catch (UnsupportedEncodingException uee) {
                log("Unable to parse EF-PL: " + Arrays.toString(efLi));
            }
        }
    }

    protected static String findBestLanguage(byte[] languages, String[] locales)
            throws UnsupportedEncodingException {
        if ((languages == null) || (locales == null)) return null;

        // Each 2-bytes consists of one language
        for (int i = 0; (i + 1) < languages.length; i += 2) {
            String lang = new String(languages, i, 2, "ISO-8859-1");
            for (int j = 0; j < locales.length; j++) {
                if (locales[j] != null && locales[j].length() >= 2 &&
                        locales[j].substring(0, 2).equalsIgnoreCase(lang)) {
                    return lang;
                }
            }
        }

        // no match found. return null
        return null;
    }

    protected abstract void handleFileUpdate(int efid);

    protected void handleRefresh(IccRefreshResponse refreshResponse){
        if (refreshResponse == null) {
            if (DBG) log("handleRefresh received without input");
            return;
        }

        if (!TextUtils.isEmpty(refreshResponse.aid) &&
                !refreshResponse.aid.equals(mParentApp.getAid())) {
            // This is for different app. Ignore.
            return;
        }

        switch (refreshResponse.refreshResult) {
            case IccRefreshResponse.REFRESH_RESULT_FILE_UPDATE:
                if (DBG) log("handleRefresh with SIM_FILE_UPDATED");
                handleFileUpdate(refreshResponse.efId);
                break;
            default:
                // unknown refresh operation
                if (DBG) log("handleRefresh with unknown operation");
                break;
        }
    }

    protected abstract void onRecordLoaded();

    protected abstract void onAllRecordsLoaded();

    /**
     * Returns the SpnDisplayRule based on settings on the SIM and the
     * current service state. See TS 22.101 Annex A and TS 51.011 10.3.11
     * for details.
     *
     * If the SPN is not found on the SIM, the rule is always PLMN_ONLY.
     * Generally used for GSM/UMTS and the like SIMs.
     *
     * @param serviceState Service state
     * @return the display rule
     *
     * @see #SPN_RULE_SHOW_SPN
     * @see #SPN_RULE_SHOW_PLMN
     */
    public abstract int getDisplayRule(ServiceState serviceState);

    /**
     * Return true if "Restriction of menu options for manual PLMN selection"
     * bit is set or EF_CSP data is unavailable, return false otherwise.
     * Generally used for GSM/UMTS and the like SIMs.
     */
    public boolean isCspPlmnEnabled() {
        return false;
    }

    /**
     * Returns the 5 or 6 digit MCC/MNC of the operator that
     * provided the SIM card. Returns null of SIM is not yet ready
     * or is not valid for the type of IccCard. Generally used for
     * GSM/UMTS and the like SIMS
     */
    public String getOperatorNumeric() {
        return null;
    }

    /**
     * Get the current Voice call forwarding flag for GSM/UMTS and the like SIMs
     *
     * @return CALL_FORWARDING_STATUS_XXX (DISABLED/ENABLED/UNKNOWN)
     */
    public int getVoiceCallForwardingFlag() {
        return CALL_FORWARDING_STATUS_UNKNOWN;
    }

    /**
     * Set the voice call forwarding flag for GSM/UMTS and the like SIMs
     *
     * @param line to enable/disable
     * @param enable
     * @param number to which CFU is enabled
     */
    public void setVoiceCallForwardingFlag(int line, boolean enable, String number) {
    }

    /**
     * Indicates wether the ICC records have been loaded or not
     *
     * @return true if the records have been loaded, false otherwise.
     */
    public boolean isLoaded() {
        return mLoaded.get();
    }

    /**
     * Indicates wether SIM is in provisioned state or not.
     * Overridden only if SIM can be dynamically provisioned via OTA.
     *
     * @return true if provisioned
     */
    public boolean isProvisioned () {
        return true;
    }

    /**
     * Write string to log file
     *
     * @param s is the string to write
     */
    protected abstract void log(String s);

    /**
     * Write error string to log file.
     *
     * @param s is the string to write
     */
    protected abstract void loge(String s);

    /**
     * Return an interface to retrieve the ISIM records for IMS, if available.
     * @return the interface to retrieve the ISIM records, or null if not supported
     */
    public IsimRecords getIsimRecords() {
        return null;
    }

    public UsimServiceTable getUsimServiceTable() {
        return null;
    }

    protected void setSystemProperty(String key, String val) {
        TelephonyManager.getDefault().setTelephonyProperty(mParentApp.getPhoneId(), key, val);

        log("[key, value]=" + key + ", " +  val);
    }

    /**
     * Returns the response of the SIM application on the UICC to authentication
     * challenge/response algorithm. The data string and challenge response are
     * Base64 encoded Strings.
     * Can support EAP-SIM, EAP-AKA with results encoded per 3GPP TS 31.102.
     *
     * @param authContext parameter P2 that specifies the authentication context per 3GPP TS 31.102 (Section 7.1.2)
     * @param data authentication challenge data
     * @return challenge response
     */
    public String getIccSimChallengeResponse(int authContext, String data) {
        if (DBG) log("getIccSimChallengeResponse:");

        try {
            synchronized(mLock) {
                CommandsInterface ci = mCi;
                UiccCardApplication parentApp = mParentApp;
                if (ci != null && parentApp != null) {
                    ci.requestIccSimAuthentication(authContext, data,
                            parentApp.getAid(),
                            obtainMessage(EVENT_AKA_AUTHENTICATE_DONE));
                    try {
                        mLock.wait();
                    } catch (InterruptedException e) {
                        loge("getIccSimChallengeResponse: Fail, interrupted"
                                + " while trying to request Icc Sim Auth");
                        return null;
                    }
                } else {
                    loge( "getIccSimChallengeResponse: "
                            + "Fail, ci or parentApp is null");
                    return null;
                }
            }
        } catch(Exception e) {
            loge( "getIccSimChallengeResponse: "
                    + "Fail while trying to request Icc Sim Auth");
            return null;
        }

        if (auth_rsp == null) {
            loge("getIccSimChallengeResponse: No authentication response");
            return null;
        }

        if (DBG) log("getIccSimChallengeResponse: return auth_rsp");

        return android.util.Base64.encodeToString(auth_rsp.payload, android.util.Base64.NO_WRAP);
    }

    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        pw.println("IccRecords: " + this);
        pw.println(" mDestroyed=" + mDestroyed);
        pw.println(" mCi=" + mCi);
        pw.println(" mFh=" + mFh);
        pw.println(" mParentApp=" + mParentApp);
        pw.println(" recordsLoadedRegistrants: size=" + mRecordsLoadedRegistrants.size());
        for (int i = 0; i < mRecordsLoadedRegistrants.size(); i++) {
            pw.println("  recordsLoadedRegistrants[" + i + "]="
                    + ((Registrant)mRecordsLoadedRegistrants.get(i)).getHandler());
        }
        pw.println(" mLockedRecordsLoadedRegistrants: size="
                + mLockedRecordsLoadedRegistrants.size());
        for (int i = 0; i < mLockedRecordsLoadedRegistrants.size(); i++) {
            pw.println("  mLockedRecordsLoadedRegistrants[" + i + "]="
                    + ((Registrant) mLockedRecordsLoadedRegistrants.get(i)).getHandler());
        }
        pw.println(" mNetworkLockedRecordsLoadedRegistrants: size="
                + mNetworkLockedRecordsLoadedRegistrants.size());
        for (int i = 0; i < mNetworkLockedRecordsLoadedRegistrants.size(); i++) {
            pw.println("  mLockedRecordsLoadedRegistrants[" + i + "]="
                    + ((Registrant) mNetworkLockedRecordsLoadedRegistrants.get(i)).getHandler());
        }
        pw.println(" mImsiReadyRegistrants: size=" + mImsiReadyRegistrants.size());
        for (int i = 0; i < mImsiReadyRegistrants.size(); i++) {
            pw.println("  mImsiReadyRegistrants[" + i + "]="
                    + ((Registrant)mImsiReadyRegistrants.get(i)).getHandler());
        }
        pw.println(" mRecordsEventsRegistrants: size=" + mRecordsEventsRegistrants.size());
        for (int i = 0; i < mRecordsEventsRegistrants.size(); i++) {
            pw.println("  mRecordsEventsRegistrants[" + i + "]="
                    + ((Registrant)mRecordsEventsRegistrants.get(i)).getHandler());
        }
        pw.println(" mNewSmsRegistrants: size=" + mNewSmsRegistrants.size());
        for (int i = 0; i < mNewSmsRegistrants.size(); i++) {
            pw.println("  mNewSmsRegistrants[" + i + "]="
                    + ((Registrant)mNewSmsRegistrants.get(i)).getHandler());
        }
        pw.println(" mNetworkSelectionModeAutomaticRegistrants: size="
                + mNetworkSelectionModeAutomaticRegistrants.size());
        for (int i = 0; i < mNetworkSelectionModeAutomaticRegistrants.size(); i++) {
            pw.println("  mNetworkSelectionModeAutomaticRegistrants[" + i + "]="
                    + ((Registrant)mNetworkSelectionModeAutomaticRegistrants.get(i)).getHandler());
        }
        pw.println(" mRecordsRequested=" + mRecordsRequested);
        pw.println(" mLockedRecordsReqReason=" + mLockedRecordsReqReason);
        pw.println(" mRecordsToLoad=" + mRecordsToLoad);
        pw.println(" mRdnCache=" + mAdnCache);

        String iccIdToPrint = SubscriptionInfo.givePrintableIccid(mFullIccId);
        pw.println(" iccid=" + iccIdToPrint);
        pw.println(" mMsisdn=" + Rlog.pii(VDBG, mMsisdn));
        pw.println(" mMsisdnTag=" + mMsisdnTag);
        pw.println(" mVoiceMailNum=" + Rlog.pii(VDBG, mVoiceMailNum));
        pw.println(" mVoiceMailTag=" + mVoiceMailTag);
        pw.println(" mNewVoiceMailNum=" + Rlog.pii(VDBG, mNewVoiceMailNum));
        pw.println(" mNewVoiceMailTag=" + mNewVoiceMailTag);
        pw.println(" mIsVoiceMailFixed=" + mIsVoiceMailFixed);
        pw.println(" mImsi=" + ((mImsi != null) ?
                mImsi.substring(0, 6) + Rlog.pii(VDBG, mImsi.substring(6)) : "null"));
        if (mCarrierTestOverride.isInTestMode()) {
            pw.println(" mFakeImsi=" + mFakeImsi);
        }
        pw.println(" mMncLength=" + mMncLength);
        pw.println(" mMailboxIndex=" + mMailboxIndex);
        pw.println(" mSpn=" + mSpn);
        if (mCarrierTestOverride.isInTestMode()) {
            pw.println(" mFakeSpn=" + mFakeSpn);
        }
        pw.flush();
    }
}