xref: /frameworks/opt/telephony/src/java/com/android/internal/telephony/uicc/UiccCard.java

/*
 * Copyright (C) 2006, 2012 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 static android.Manifest.permission.READ_PHONE_STATE;
import android.app.ActivityManagerNative;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Resources;
import android.os.AsyncResult;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.os.Registrant;
import android.os.RegistrantList;
import android.telephony.Rlog;
import android.view.WindowManager;

import com.android.internal.telephony.CommandsInterface;
import com.android.internal.telephony.PhoneBase;
import com.android.internal.telephony.CommandsInterface.RadioState;
import com.android.internal.telephony.IccCardConstants.State;
import com.android.internal.telephony.gsm.GSMPhone;
import com.android.internal.telephony.uicc.IccCardApplicationStatus.AppType;
import com.android.internal.telephony.uicc.IccCardStatus.CardState;
import com.android.internal.telephony.uicc.IccCardStatus.PinState;
import com.android.internal.telephony.cat.CatService;
import com.android.internal.telephony.cdma.CDMALTEPhone;
import com.android.internal.telephony.cdma.CDMAPhone;
import com.android.internal.telephony.cdma.CdmaSubscriptionSourceManager;

import android.os.SystemProperties;

import com.android.internal.R;

/**
 * {@hide}
 */
public class UiccCard {
    protected static final String LOG_TAG = "RIL_UiccCard";
    protected static final boolean DBG = true;

    private final Object mLock = new Object();
    private CardState mCardState;
    private PinState mUniversalPinState;
    private int mGsmUmtsSubscriptionAppIndex;
    private int mCdmaSubscriptionAppIndex;
    private int mImsSubscriptionAppIndex;
    private UiccCardApplication[] mUiccApplications =
            new UiccCardApplication[IccCardStatus.CARD_MAX_APPS];
    private Context mContext;
    private CommandsInterface mCi;
    private CatService mCatService;
    private boolean mDestroyed = false; //set to true once this card is commanded to be disposed of.
    private RadioState mLastRadioState =  RadioState.RADIO_UNAVAILABLE;

    private RegistrantList mAbsentRegistrants = new RegistrantList();

    private static final int EVENT_CARD_REMOVED = 13;
    private static final int EVENT_CARD_ADDED = 14;

    public UiccCard(Context c, CommandsInterface ci, IccCardStatus ics) {
        if (DBG) log("Creating");
        mCardState = ics.mCardState;
        update(c, ci, ics);
    }

    public void dispose() {
        synchronized (mLock) {
            if (DBG) log("Disposing card");
            if (mCatService != null) mCatService.dispose();
            for (UiccCardApplication app : mUiccApplications) {
                if (app != null) {
                    app.dispose();
                }
            }
            mCatService = null;
            mUiccApplications = null;
        }
    }

    public void update(Context c, CommandsInterface ci, IccCardStatus ics) {
        synchronized (mLock) {
            if (mDestroyed) {
                loge("Updated after destroyed! Fix me!");
                return;
            }
            CardState oldState = mCardState;
            mCardState = ics.mCardState;
            mUniversalPinState = ics.mUniversalPinState;
            mGsmUmtsSubscriptionAppIndex = ics.mGsmUmtsSubscriptionAppIndex;
            mCdmaSubscriptionAppIndex = ics.mCdmaSubscriptionAppIndex;
            mImsSubscriptionAppIndex = ics.mImsSubscriptionAppIndex;
            mContext = c;
            mCi = ci;
            //update applications
            if (DBG) log(ics.mApplications.length + " applications");
            for ( int i = 0; i < mUiccApplications.length; i++) {
                if (mUiccApplications[i] == null) {
                    //Create newly added Applications
                    if (i < ics.mApplications.length) {
                        mUiccApplications[i] = new UiccCardApplication(this,
                                ics.mApplications[i], mContext, mCi);
                    }
                } else if (i >= ics.mApplications.length) {
                    //Delete removed applications
                    mUiccApplications[i].dispose();
                    mUiccApplications[i] = null;
                } else {
                    //Update the rest
                    mUiccApplications[i].update(ics.mApplications[i], mContext, mCi);
                }
            }

            if (mUiccApplications.length > 0 && mUiccApplications[0] != null) {
                // Initialize or Reinitialize CatService
                mCatService = CatService.getInstance(mCi,
                                                     mContext,
                                                     this);
            } else {
                if (mCatService != null) {
                    mCatService.dispose();
                }
                mCatService = null;
            }

            sanitizeApplicationIndexes();

            RadioState radioState = mCi.getRadioState();
            if (DBG) log("update: radioState=" + radioState + " mLastRadioState="
                    + mLastRadioState);
            // No notifications while radio is off or we just powering up
            if (radioState == RadioState.RADIO_ON && mLastRadioState == RadioState.RADIO_ON) {
                if (oldState != CardState.CARDSTATE_ABSENT &&
                        mCardState == CardState.CARDSTATE_ABSENT) {
                    if (DBG) log("update: notify card removed");
                    mAbsentRegistrants.notifyRegistrants();
                    mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_REMOVED, null));
                } else if (oldState == CardState.CARDSTATE_ABSENT &&
                        mCardState != CardState.CARDSTATE_ABSENT) {
                    if (DBG) log("update: notify card added");
                    mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_ADDED, null));
                }
            }
            mLastRadioState = radioState;
        }
    }

    protected void finalize() {
        if (DBG) log("UiccCard finalized");
    }

    /**
     * This function makes sure that application indexes are valid
     * and resets invalid indexes. (This should never happen, but in case
     * RIL misbehaves we need to manage situation gracefully)
     */
    private void sanitizeApplicationIndexes() {
        mGsmUmtsSubscriptionAppIndex =
                checkIndex(mGsmUmtsSubscriptionAppIndex, AppType.APPTYPE_SIM, AppType.APPTYPE_USIM);
        mCdmaSubscriptionAppIndex =
                checkIndex(mCdmaSubscriptionAppIndex, AppType.APPTYPE_RUIM, AppType.APPTYPE_CSIM);
        mImsSubscriptionAppIndex =
                checkIndex(mImsSubscriptionAppIndex, AppType.APPTYPE_ISIM, null);
    }

    private int checkIndex(int index, AppType expectedAppType, AppType altExpectedAppType) {
        if (mUiccApplications == null || index >= mUiccApplications.length) {
            loge("App index " + index + " is invalid since there are no applications");
            return -1;
        }

        if (index < 0) {
            // This is normal. (i.e. no application of this type)
            return -1;
        }

        if (mUiccApplications[index].getType() != expectedAppType &&
            mUiccApplications[index].getType() != altExpectedAppType) {
            loge("App index " + index + " is invalid since it's not " +
                    expectedAppType + " and not " + altExpectedAppType);
            return -1;
        }

        // Seems to be valid
        return index;
    }

    /**
     * Notifies handler of any transition into State.ABSENT
     */
    public void registerForAbsent(Handler h, int what, Object obj) {
        synchronized (mLock) {
            Registrant r = new Registrant (h, what, obj);

            mAbsentRegistrants.add(r);

            if (mCardState == CardState.CARDSTATE_ABSENT) {
                r.notifyRegistrant();
            }
        }
    }

    public void unregisterForAbsent(Handler h) {
        synchronized (mLock) {
            mAbsentRegistrants.remove(h);
        }
    }

    private void onIccSwap(boolean isAdded) {
        synchronized (mLock) {
            // TODO: Here we assume the device can't handle SIM hot-swap
            //      and has to reboot. We may want to add a property,
            //      e.g. REBOOT_ON_SIM_SWAP, to indicate if modem support
            //      hot-swap.
            DialogInterface.OnClickListener listener = null;


            // TODO: SimRecords is not reset while SIM ABSENT (only reset while
            //       Radio_off_or_not_available). Have to reset in both both
            //       added or removed situation.
            listener = new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    synchronized (mLock) {
                        if (which == DialogInterface.BUTTON_POSITIVE) {
                            if (DBG) log("Reboot due to SIM swap");
                            PowerManager pm = (PowerManager) mContext
                                    .getSystemService(Context.POWER_SERVICE);
                            pm.reboot("SIM is added.");
                        }
                    }
                }

            };

            Resources r = Resources.getSystem();

            String title = (isAdded) ? r.getString(R.string.sim_added_title) :
                r.getString(R.string.sim_removed_title);
            String message = (isAdded) ? r.getString(R.string.sim_added_message) :
                r.getString(R.string.sim_removed_message);
            String buttonTxt = r.getString(R.string.sim_restart_button);

            AlertDialog dialog = new AlertDialog.Builder(mContext)
            .setTitle(title)
            .setMessage(message)
            .setPositiveButton(buttonTxt, listener)
            .create();
            dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
            dialog.show();
        }
    }

    protected Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg){
            if (mDestroyed) {
                loge("Received message " + msg + "[" + msg.what
                        + "] while being destroyed. Ignoring.");
                return;
            }

            switch (msg.what) {
                case EVENT_CARD_REMOVED:
                    onIccSwap(false);
                    break;
                case EVENT_CARD_ADDED:
                    onIccSwap(true);
                    break;
                default:
                    loge("Unknown Event " + msg.what);
            }
        }
    };

    public boolean isApplicationOnIcc(IccCardApplicationStatus.AppType type) {
        synchronized (mLock) {
            for (int i = 0 ; i < mUiccApplications.length; i++) {
                if (mUiccApplications[i] != null && mUiccApplications[i].getType() == type) {
                    return true;
                }
            }
            return false;
        }
    }

    public CardState getCardState() {
        synchronized (mLock) {
            return mCardState;
        }
    }

    public PinState getUniversalPinState() {
        synchronized (mLock) {
            return mUniversalPinState;
        }
    }

    public UiccCardApplication getApplication(int family) {
        synchronized (mLock) {
            int index = IccCardStatus.CARD_MAX_APPS;
            switch (family) {
                case UiccController.APP_FAM_3GPP:
                    index = mGsmUmtsSubscriptionAppIndex;
                    break;
                case UiccController.APP_FAM_3GPP2:
                    index = mCdmaSubscriptionAppIndex;
                    break;
                case UiccController.APP_FAM_IMS:
                    index = mImsSubscriptionAppIndex;
                    break;
            }
            if (index >= 0 && index < mUiccApplications.length) {
                return mUiccApplications[index];
            }
            return null;
        }
    }

    public UiccCardApplication getApplicationIndex(int index) {
        synchronized (mLock) {
            if (index >= 0 && index < mUiccApplications.length) {
                return mUiccApplications[index];
            }
            return null;
        }
    }

    private void log(String msg) {
        Rlog.d(LOG_TAG, msg);
    }

    private void loge(String msg) {
        Rlog.e(LOG_TAG, msg);
    }
}