1 /*
2  * Copyright (C) 2015 Google Inc. All Rights Reserved.
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 package com.android.phone.vvm.omtp.sms;
17 
18 import android.annotation.Nullable;
19 import android.app.PendingIntent;
20 import android.telephony.SmsManager;
21 import android.text.TextUtils;
22 
23 import com.android.phone.vvm.omtp.OmtpConstants;
24 
25 /**
26  * A implementation of the OmtpMessageSender using the standard OMTP sms protocol.
27  */
28 public class OmtpStandardMessageSender extends OmtpMessageSender {
29     private final String mClientType;
30     private final String mProtocolVersion;
31     private final String mClientPrefix;
32 
33     /**
34      * Creates a new instance of OmtpStandardMessageSender.
35      *
36      * @param smsManager SMS sending library. There is a different SmsManager for each SIM.
37      * @param applicationPort If set to a value > 0 then a binary sms is sent to this port number.
38      *            Otherwise, a standard text SMS is sent.
39      * @param destinationNumber Destination number to be used.
40      * @param clientType The "ct" field to be set in the MO message. This is the value used by the
41      *            VVM server to identify the client. Certain VVM servers require a specific agreed
42      *            value for this field.
43      * @param protocolVersion OMTP protocol version.
44      * @param clientPrefix The client prefix requested to be used by the server in its MT messages.
45      */
OmtpStandardMessageSender(SmsManager smsManager, short applicationPort, String destinationNumber, String clientType, String protocolVersion, String clientPrefix)46     public OmtpStandardMessageSender(SmsManager smsManager, short applicationPort,
47             String destinationNumber, String clientType, String protocolVersion,
48             String clientPrefix) {
49         super(smsManager, applicationPort, destinationNumber);
50         mClientType = clientType;
51         mProtocolVersion = protocolVersion;
52         mClientPrefix = clientPrefix;
53     }
54 
55     // Activate message:
56     // V1.1: Activate:pv=<value>;ct=<value>
57     // V1.2: Activate:pv=<value>;ct=<value>;pt=<value>;<Clientprefix>
58     // V1.3: Activate:pv=<value>;ct=<value>;pt=<value>;<Clientprefix>
59     @Override
requestVvmActivation(@ullable PendingIntent sentIntent)60     public void requestVvmActivation(@Nullable PendingIntent sentIntent) {
61         StringBuilder sb = new StringBuilder().append(OmtpConstants.ACTIVATE_REQUEST);
62 
63         appendProtocolVersionAndClientType(sb);
64         if (TextUtils.equals(mProtocolVersion, OmtpConstants.PROTOCOL_VERSION1_2) ||
65                 TextUtils.equals(mProtocolVersion, OmtpConstants.PROTOCOL_VERSION1_3)) {
66             appendApplicationPort(sb);
67             appendClientPrefix(sb);
68         }
69 
70         sendSms(sb.toString(), sentIntent);
71     }
72 
73     // Deactivate message:
74     // V1.1: Deactivate:pv=<value>;ct=<string>
75     // V1.2: Deactivate:pv=<value>;ct=<string>
76     // V1.3: Deactivate:pv=<value>;ct=<string>
77     @Override
requestVvmDeactivation(@ullable PendingIntent sentIntent)78     public void requestVvmDeactivation(@Nullable PendingIntent sentIntent) {
79         StringBuilder sb = new StringBuilder().append(OmtpConstants.DEACTIVATE_REQUEST);
80         appendProtocolVersionAndClientType(sb);
81 
82         sendSms(sb.toString(), sentIntent);
83     }
84 
85     // Status message:
86     // V1.1: STATUS
87     // V1.2: STATUS
88     // V1.3: STATUS:pv=<value>;ct=<value>;pt=<value>;<Clientprefix>
89     @Override
requestVvmStatus(@ullable PendingIntent sentIntent)90     public void requestVvmStatus(@Nullable PendingIntent sentIntent) {
91         StringBuilder sb = new StringBuilder().append(OmtpConstants.STATUS_REQUEST);
92 
93         if (TextUtils.equals(mProtocolVersion, OmtpConstants.PROTOCOL_VERSION1_3)) {
94             appendProtocolVersionAndClientType(sb);
95             appendApplicationPort(sb);
96             appendClientPrefix(sb);
97         }
98 
99         sendSms(sb.toString(), sentIntent);
100     }
101 
appendProtocolVersionAndClientType(StringBuilder sb)102     private void appendProtocolVersionAndClientType(StringBuilder sb) {
103         sb.append(OmtpConstants.SMS_PREFIX_SEPARATOR);
104         appendField(sb, OmtpConstants.PROTOCOL_VERSION, mProtocolVersion);
105         sb.append(OmtpConstants.SMS_FIELD_SEPARATOR);
106         appendField(sb, OmtpConstants.CLIENT_TYPE, mClientType);
107     }
108 
appendApplicationPort(StringBuilder sb)109     private void appendApplicationPort(StringBuilder sb) {
110         sb.append(OmtpConstants.SMS_FIELD_SEPARATOR);
111         appendField(sb, OmtpConstants.APPLICATION_PORT, mApplicationPort);
112     }
113 
appendClientPrefix(StringBuilder sb)114     private void appendClientPrefix(StringBuilder sb) {
115         sb.append(OmtpConstants.SMS_FIELD_SEPARATOR);
116         sb.append(mClientPrefix);
117     }
118 }
119