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      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      */
     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
     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
     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
     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 
    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 
    109     private void appendApplicationPort(StringBuilder sb) {
    110         sb.append(OmtpConstants.SMS_FIELD_SEPARATOR);
    111         appendField(sb, OmtpConstants.APPLICATION_PORT, mApplicationPort);
    112     }
    113 
    114     private void appendClientPrefix(StringBuilder sb) {
    115         sb.append(OmtpConstants.SMS_FIELD_SEPARATOR);
    116         sb.append(mClientPrefix);
    117     }
    118 }
    119