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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.internal.telephony;
     18 
     19 import android.content.BroadcastReceiver;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.os.AsyncResult;
     24 import android.os.Handler;
     25 import android.os.Message;
     26 import android.os.PowerManager;
     27 import android.provider.Telephony.Sms.Intents;
     28 import android.telephony.Rlog;
     29 import android.telephony.SubscriptionManager;
     30 
     31 /**
     32  * Monitors the device and ICC storage, and sends the appropriate events.
     33  *
     34  * This code was formerly part of {@link SMSDispatcher}, and has been moved
     35  * into a separate class to support instantiation of multiple SMSDispatchers on
     36  * dual-mode devices that require support for both 3GPP and 3GPP2 format messages.
     37  */
     38 public class SmsStorageMonitor extends Handler {
     39     private static final String TAG = "SmsStorageMonitor";
     40 
     41     /** SIM/RUIM storage is full */
     42     private static final int EVENT_ICC_FULL = 1;
     43 
     44     /** Memory status reporting is acknowledged by RIL */
     45     private static final int EVENT_REPORT_MEMORY_STATUS_DONE = 2;
     46 
     47     /** Radio is ON */
     48     private static final int EVENT_RADIO_ON = 3;
     49 
     50     /** Context from phone object passed to constructor. */
     51     private final Context mContext;
     52 
     53     /** Wake lock to ensure device stays awake while dispatching the SMS intent. */
     54     private PowerManager.WakeLock mWakeLock;
     55 
     56     private boolean mReportMemoryStatusPending;
     57 
     58     /** it is use to put in to extra value for SIM_FULL_ACTION and SMS_REJECTED_ACTION */
     59     Phone mPhone;
     60 
     61     final CommandsInterface mCi;                            // accessed from inner class
     62     boolean mStorageAvailable = true;                       // accessed from inner class
     63 
     64     /**
     65      * Hold the wake lock for 5 seconds, which should be enough time for
     66      * any receiver(s) to grab its own wake lock.
     67      */
     68     private static final int WAKE_LOCK_TIMEOUT = 5000;
     69 
     70     /**
     71      * Creates an SmsStorageMonitor and registers for events.
     72      * @param phone the Phone to use
     73      */
     74     public SmsStorageMonitor(Phone phone) {
     75         mPhone = phone;
     76         mContext = phone.getContext();
     77         mCi = phone.mCi;
     78 
     79         createWakelock();
     80 
     81         mCi.setOnIccSmsFull(this, EVENT_ICC_FULL, null);
     82         mCi.registerForOn(this, EVENT_RADIO_ON, null);
     83 
     84         // Register for device storage intents.  Use these to notify the RIL
     85         // that storage for SMS is or is not available.
     86         IntentFilter filter = new IntentFilter();
     87         filter.addAction(Intent.ACTION_DEVICE_STORAGE_FULL);
     88         filter.addAction(Intent.ACTION_DEVICE_STORAGE_NOT_FULL);
     89         mContext.registerReceiver(mResultReceiver, filter);
     90     }
     91 
     92     public void dispose() {
     93         mCi.unSetOnIccSmsFull(this);
     94         mCi.unregisterForOn(this);
     95         mContext.unregisterReceiver(mResultReceiver);
     96     }
     97 
     98     /**
     99      * Handles events coming from the phone stack. Overridden from handler.
    100      * @param msg the message to handle
    101      */
    102     @Override
    103     public void handleMessage(Message msg) {
    104         AsyncResult ar;
    105 
    106         switch (msg.what) {
    107             case EVENT_ICC_FULL:
    108                 handleIccFull();
    109                 break;
    110 
    111             case EVENT_REPORT_MEMORY_STATUS_DONE:
    112                 ar = (AsyncResult) msg.obj;
    113                 if (ar.exception != null) {
    114                     mReportMemoryStatusPending = true;
    115                     Rlog.v(TAG, "Memory status report to modem pending : mStorageAvailable = "
    116                             + mStorageAvailable);
    117                 } else {
    118                     mReportMemoryStatusPending = false;
    119                 }
    120                 break;
    121 
    122             case EVENT_RADIO_ON:
    123                 if (mReportMemoryStatusPending) {
    124                     Rlog.v(TAG, "Sending pending memory status report : mStorageAvailable = "
    125                             + mStorageAvailable);
    126                     mCi.reportSmsMemoryStatus(mStorageAvailable,
    127                             obtainMessage(EVENT_REPORT_MEMORY_STATUS_DONE));
    128                 }
    129                 break;
    130         }
    131     }
    132 
    133     private void createWakelock() {
    134         PowerManager pm = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
    135         mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "SmsStorageMonitor");
    136         mWakeLock.setReferenceCounted(true);
    137     }
    138 
    139     /**
    140      * Called when SIM_FULL message is received from the RIL. Notifies the default SMS application
    141      * that SIM storage for SMS messages is full.
    142      */
    143     private void handleIccFull() {
    144         // broadcast SIM_FULL intent
    145         Intent intent = new Intent(Intents.SIM_FULL_ACTION);
    146         intent.setComponent(SmsApplication.getDefaultSimFullApplication(mContext, false));
    147         mWakeLock.acquire(WAKE_LOCK_TIMEOUT);
    148         SubscriptionManager.putPhoneIdAndSubIdExtra(intent, mPhone.getPhoneId());
    149         mContext.sendBroadcast(intent, android.Manifest.permission.RECEIVE_SMS);
    150     }
    151 
    152     /** Returns whether or not there is storage available for an incoming SMS. */
    153     public boolean isStorageAvailable() {
    154         return mStorageAvailable;
    155     }
    156 
    157     private final BroadcastReceiver mResultReceiver = new BroadcastReceiver() {
    158         @Override
    159         public void onReceive(Context context, Intent intent) {
    160             if (intent.getAction().equals(Intent.ACTION_DEVICE_STORAGE_FULL)) {
    161                 mStorageAvailable = false;
    162                 mCi.reportSmsMemoryStatus(false, obtainMessage(EVENT_REPORT_MEMORY_STATUS_DONE));
    163             } else if (intent.getAction().equals(Intent.ACTION_DEVICE_STORAGE_NOT_FULL)) {
    164                 mStorageAvailable = true;
    165                 mCi.reportSmsMemoryStatus(true, obtainMessage(EVENT_REPORT_MEMORY_STATUS_DONE));
    166             }
    167         }
    168     };
    169 }
    170