1/*
2 * Copyright (C) 2013 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
17package com.android.internal.telephony.cdma;
18
19import android.Manifest;
20import android.app.Activity;
21import android.app.AppOpsManager;
22import android.content.BroadcastReceiver;
23import android.content.Context;
24import android.content.Intent;
25import android.os.Bundle;
26import android.os.Message;
27import android.provider.Telephony.Sms.Intents;
28import android.telephony.PhoneNumberUtils;
29import android.telephony.SubscriptionManager;
30import android.telephony.cdma.CdmaSmsCbProgramData;
31import android.telephony.cdma.CdmaSmsCbProgramResults;
32
33import com.android.internal.telephony.CommandsInterface;
34import com.android.internal.telephony.WakeLockStateMachine;
35import com.android.internal.telephony.cdma.sms.BearerData;
36import com.android.internal.telephony.cdma.sms.CdmaSmsAddress;
37import com.android.internal.telephony.cdma.sms.SmsEnvelope;
38
39import java.io.ByteArrayOutputStream;
40import java.io.DataOutputStream;
41import java.io.IOException;
42import java.util.ArrayList;
43
44/**
45 * Handle CDMA Service Category Program Data requests and responses.
46 */
47public final class CdmaServiceCategoryProgramHandler extends WakeLockStateMachine {
48
49    final CommandsInterface mCi;
50
51    /**
52     * Create a new CDMA inbound SMS handler.
53     */
54    CdmaServiceCategoryProgramHandler(Context context, CommandsInterface commandsInterface) {
55        super("CdmaServiceCategoryProgramHandler", context, null);
56        mContext = context;
57        mCi = commandsInterface;
58    }
59
60    /**
61     * Create a new State machine for SCPD requests.
62     * @param context the context to use
63     * @param commandsInterface the radio commands interface
64     * @return the new SCPD handler
65     */
66    static CdmaServiceCategoryProgramHandler makeScpHandler(Context context,
67            CommandsInterface commandsInterface) {
68        CdmaServiceCategoryProgramHandler handler = new CdmaServiceCategoryProgramHandler(
69                context, commandsInterface);
70        handler.start();
71        return handler;
72    }
73
74    /**
75     * Handle Cell Broadcast messages from {@code CdmaInboundSmsHandler}.
76     * 3GPP-format Cell Broadcast messages sent from radio are handled in the subclass.
77     *
78     * @param message the message to process
79     * @return true if an ordered broadcast was sent; false on failure
80     */
81    @Override
82    protected boolean handleSmsMessage(Message message) {
83        if (message.obj instanceof SmsMessage) {
84            return handleServiceCategoryProgramData((SmsMessage) message.obj);
85        } else {
86            loge("handleMessage got object of type: " + message.obj.getClass().getName());
87            return false;
88        }
89    }
90
91
92    /**
93     * Send SCPD request to CellBroadcastReceiver as an ordered broadcast.
94     * @param sms the CDMA SmsMessage containing the SCPD request
95     * @return true if an ordered broadcast was sent; false on failure
96     */
97    private boolean handleServiceCategoryProgramData(SmsMessage sms) {
98        ArrayList<CdmaSmsCbProgramData> programDataList = sms.getSmsCbProgramData();
99        if (programDataList == null) {
100            loge("handleServiceCategoryProgramData: program data list is null!");
101            return false;
102        }
103
104        Intent intent = new Intent(Intents.SMS_SERVICE_CATEGORY_PROGRAM_DATA_RECEIVED_ACTION);
105        intent.setPackage(mContext.getResources().getString(
106                com.android.internal.R.string.config_defaultCellBroadcastReceiverPkg));
107        intent.putExtra("sender", sms.getOriginatingAddress());
108        intent.putParcelableArrayListExtra("program_data", programDataList);
109        SubscriptionManager.putPhoneIdAndSubIdExtra(intent, mPhone.getPhoneId());
110        mContext.sendOrderedBroadcast(intent, Manifest.permission.RECEIVE_SMS,
111                AppOpsManager.OP_RECEIVE_SMS, mScpResultsReceiver,
112                getHandler(), Activity.RESULT_OK, null, null);
113        return true;
114    }
115
116    /**
117     * Broadcast receiver to handle results of ordered broadcast. Sends the SCPD results
118     * as a reply SMS, then sends a message to state machine to transition to idle.
119     */
120    private final BroadcastReceiver mScpResultsReceiver = new BroadcastReceiver() {
121        @Override
122        public void onReceive(Context context, Intent intent) {
123            sendScpResults();
124            if (DBG) log("mScpResultsReceiver finished");
125            sendMessage(EVENT_BROADCAST_COMPLETE);
126        }
127
128        private void sendScpResults() {
129            int resultCode = getResultCode();
130            if ((resultCode != Activity.RESULT_OK) && (resultCode != Intents.RESULT_SMS_HANDLED)) {
131                loge("SCP results error: result code = " + resultCode);
132                return;
133            }
134            Bundle extras = getResultExtras(false);
135            if (extras == null) {
136                loge("SCP results error: missing extras");
137                return;
138            }
139            String sender = extras.getString("sender");
140            if (sender == null) {
141                loge("SCP results error: missing sender extra.");
142                return;
143            }
144            ArrayList<CdmaSmsCbProgramResults> results
145                    = extras.getParcelableArrayList("results");
146            if (results == null) {
147                loge("SCP results error: missing results extra.");
148                return;
149            }
150
151            BearerData bData = new BearerData();
152            bData.messageType = BearerData.MESSAGE_TYPE_SUBMIT;
153            bData.messageId = SmsMessage.getNextMessageId();
154            bData.serviceCategoryProgramResults = results;
155            byte[] encodedBearerData = BearerData.encode(bData);
156
157            ByteArrayOutputStream baos = new ByteArrayOutputStream(100);
158            DataOutputStream dos = new DataOutputStream(baos);
159            try {
160                dos.writeInt(SmsEnvelope.TELESERVICE_SCPT);
161                dos.writeInt(0); //servicePresent
162                dos.writeInt(0); //serviceCategory
163                CdmaSmsAddress destAddr = CdmaSmsAddress.parse(
164                        PhoneNumberUtils.cdmaCheckAndProcessPlusCodeForSms(sender));
165                dos.write(destAddr.digitMode);
166                dos.write(destAddr.numberMode);
167                dos.write(destAddr.ton); // number_type
168                dos.write(destAddr.numberPlan);
169                dos.write(destAddr.numberOfDigits);
170                dos.write(destAddr.origBytes, 0, destAddr.origBytes.length); // digits
171                // Subaddress is not supported.
172                dos.write(0); //subaddressType
173                dos.write(0); //subaddr_odd
174                dos.write(0); //subaddr_nbr_of_digits
175                dos.write(encodedBearerData.length);
176                dos.write(encodedBearerData, 0, encodedBearerData.length);
177                // Ignore the RIL response. TODO: implement retry if SMS send fails.
178                mCi.sendCdmaSms(baos.toByteArray(), null);
179            } catch (IOException e) {
180                loge("exception creating SCP results PDU", e);
181            } finally {
182                try {
183                    dos.close();
184                } catch (IOException ignored) {
185                }
186            }
187        }
188    };
189}
190