CdmaServiceCategoryProgramHandler.java revision d2feaf918ab0c1173d4ada182532e48d0c0d3f77 
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.cdma.CdmaSmsCbProgramData;
30import android.telephony.cdma.CdmaSmsCbProgramResults;
31
32import com.android.internal.telephony.CommandsInterface;
33import com.android.internal.telephony.WakeLockStateMachine;
34import com.android.internal.telephony.cdma.sms.BearerData;
35import com.android.internal.telephony.cdma.sms.CdmaSmsAddress;
36import com.android.internal.telephony.cdma.sms.SmsEnvelope;
37
38import java.io.ByteArrayOutputStream;
39import java.io.DataOutputStream;
40import java.io.IOException;
41import java.util.ArrayList;
42
43/**
44 * Handle CDMA Service Category Program Data requests and responses.
45 */
46public final class CdmaServiceCategoryProgramHandler extends WakeLockStateMachine {
47
48    final CommandsInterface mCi;
49
50    /**
51     * Create a new CDMA inbound SMS handler.
52     */
53    CdmaServiceCategoryProgramHandler(Context context, CommandsInterface commandsInterface) {
54        super("CdmaServiceCategoryProgramHandler", context, null);
55        mContext = context;
56        mCi = commandsInterface;
57    }
58
59    /**
60     * Create a new State machine for SCPD requests.
61     * @param context the context to use
62     * @param commandsInterface the radio commands interface
63     * @return the new SCPD handler
64     */
65    static CdmaServiceCategoryProgramHandler makeScpHandler(Context context,
66            CommandsInterface commandsInterface) {
67        CdmaServiceCategoryProgramHandler handler = new CdmaServiceCategoryProgramHandler(
68                context, commandsInterface);
69        handler.start();
70        return handler;
71    }
72
73    /**
74     * Handle Cell Broadcast messages from {@code CdmaInboundSmsHandler}.
75     * 3GPP-format Cell Broadcast messages sent from radio are handled in the subclass.
76     *
77     * @param message the message to process
78     * @return true if an ordered broadcast was sent; false on failure
79     */
80    @Override
81    protected boolean handleSmsMessage(Message message) {
82        if (message.obj instanceof SmsMessage) {
83            return handleServiceCategoryProgramData((SmsMessage) message.obj);
84        } else {
85            loge("handleMessage got object of type: " + message.obj.getClass().getName());
86            return false;
87        }
88    }
89
90
91    /**
92     * Send SCPD request to CellBroadcastReceiver as an ordered broadcast.
93     * @param sms the CDMA SmsMessage containing the SCPD request
94     * @return true if an ordered broadcast was sent; false on failure
95     */
96    private boolean handleServiceCategoryProgramData(SmsMessage sms) {
97        ArrayList<CdmaSmsCbProgramData> programDataList = sms.getSmsCbProgramData();
98        if (programDataList == null) {
99            loge("handleServiceCategoryProgramData: program data list is null!");
100            return false;
101        }
102
103        Intent intent = new Intent(Intents.SMS_SERVICE_CATEGORY_PROGRAM_DATA_RECEIVED_ACTION);
104        intent.putExtra("sender", sms.getOriginatingAddress());
105        intent.putParcelableArrayListExtra("program_data", programDataList);
106
107        mContext.sendOrderedBroadcast(intent, Manifest.permission.RECEIVE_SMS,
108                AppOpsManager.OP_RECEIVE_SMS, mScpResultsReceiver,
109                getHandler(), Activity.RESULT_OK, null, null);
110        return true;
111    }
112
113    /**
114     * Broadcast receiver to handle results of ordered broadcast. Sends the SCPD results
115     * as a reply SMS, then sends a message to state machine to transition to idle.
116     */
117    private final BroadcastReceiver mScpResultsReceiver = new BroadcastReceiver() {
118        @Override
119        public void onReceive(Context context, Intent intent) {
120            sendScpResults();
121            if (DBG) log("mScpResultsReceiver finished");
122            sendMessage(EVENT_BROADCAST_COMPLETE);
123        }
124
125        private void sendScpResults() {
126            int resultCode = getResultCode();
127            if ((resultCode != Activity.RESULT_OK) && (resultCode != Intents.RESULT_SMS_HANDLED)) {
128                loge("SCP results error: result code = " + resultCode);
129                return;
130            }
131            Bundle extras = getResultExtras(false);
132            if (extras == null) {
133                loge("SCP results error: missing extras");
134                return;
135            }
136            String sender = extras.getString("sender");
137            if (sender == null) {
138                loge("SCP results error: missing sender extra.");
139                return;
140            }
141            ArrayList<CdmaSmsCbProgramResults> results
142                    = extras.getParcelableArrayList("results");
143            if (results == null) {
144                loge("SCP results error: missing results extra.");
145                return;
146            }
147
148            BearerData bData = new BearerData();
149            bData.messageType = BearerData.MESSAGE_TYPE_SUBMIT;
150            bData.messageId = SmsMessage.getNextMessageId();
151            bData.serviceCategoryProgramResults = results;
152            byte[] encodedBearerData = BearerData.encode(bData);
153
154            ByteArrayOutputStream baos = new ByteArrayOutputStream(100);
155            DataOutputStream dos = new DataOutputStream(baos);
156            try {
157                dos.writeInt(SmsEnvelope.TELESERVICE_SCPT);
158                dos.writeInt(0); //servicePresent
159                dos.writeInt(0); //serviceCategory
160                CdmaSmsAddress destAddr = CdmaSmsAddress.parse(
161                        PhoneNumberUtils.cdmaCheckAndProcessPlusCode(sender));
162                dos.write(destAddr.digitMode);
163                dos.write(destAddr.numberMode);
164                dos.write(destAddr.ton); // number_type
165                dos.write(destAddr.numberPlan);
166                dos.write(destAddr.numberOfDigits);
167                dos.write(destAddr.origBytes, 0, destAddr.origBytes.length); // digits
168                // Subaddress is not supported.
169                dos.write(0); //subaddressType
170                dos.write(0); //subaddr_odd
171                dos.write(0); //subaddr_nbr_of_digits
172                dos.write(encodedBearerData.length);
173                dos.write(encodedBearerData, 0, encodedBearerData.length);
174                // Ignore the RIL response. TODO: implement retry if SMS send fails.
175                mCi.sendCdmaSms(baos.toByteArray(), null);
176            } catch (IOException e) {
177                loge("exception creating SCP results PDU", e);
178            } finally {
179                try {
180                    dos.close();
181                } catch (IOException ignored) {
182                }
183            }
184        }
185    };
186}
187