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1 /* |
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2 * Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * Filename: CXClient.cpp |
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16 * Author: Sanjeet Matharu |
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17 * This is the client side of the protocol which takes name/value pairs and does stuff |
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18 * System Includes |
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19 * |
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20 */ |
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21 |
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22 |
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23 |
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24 #include <stdio.h> |
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25 #include <stdlib.h> |
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26 #include <ctype.h> |
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27 #include <memory.h> |
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28 #include <string.h> |
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29 #include <assert.h> |
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30 |
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31 #ifdef WIN32 |
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32 #include <winsock2.h> |
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33 #include <windows.h> |
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34 #else |
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35 #include <sys/types.h> |
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36 #include <sys/socket.h> |
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37 #endif |
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38 |
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39 /******************************************************************************* |
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40 * |
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41 * Local Includes |
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42 * |
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43 ******************************************************************************/ |
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44 #include "cxclient.h" |
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45 |
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46 #define MAXRETRIES 5 |
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47 |
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48 //------------------------------------------------------------------------------ |
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49 //constructor |
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50 CXClient::CXClient() |
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51 { |
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52 iClientStatus = SENDING_HELLO; |
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53 |
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54 sprintf(hellobuffer, "%s", "HELLO"); |
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55 sprintf(goodbyebuffer, "%s", "GOODBYE"); |
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56 } |
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57 |
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58 //------------------------------------------------------------------------------ |
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59 //destructor |
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60 CXClient::~CXClient() |
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61 { |
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62 |
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63 } |
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64 |
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65 //------------------------------------------------------------------------------ |
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66 //this function adds the specified value into the list of name value pairs |
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67 int CXClient::OnExecute(int handle, char* cValue, int dim1, int dim2) |
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68 { |
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69 int error = 0; |
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70 int localsocket = handle; |
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71 int counter = 0; |
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72 |
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73 if(localsocket != 0) |
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74 { |
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75 error = SendData(localsocket, hellobuffer); |
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76 //send the hello to the server side first |
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77 if( error != OK_DATATRANSFER) |
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78 { |
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79 //give up and return a message |
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80 printf("There was a problem saying hello...\n"); |
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81 return -1; |
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82 } |
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83 } |
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84 else |
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85 { |
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86 printf("There was a problem with the socket...\n"); |
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87 return -1; |
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88 } |
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89 |
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90 //go through the valuebuffer and send the data |
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91 for(counter = 0; counter < dim1; counter++) |
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92 { |
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93 error = SendData(localsocket, &cValue[counter*dim2]); |
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94 if( error != OK_DATATRANSFER) |
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95 { |
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96 //give up and return a message |
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97 printf("There was a problem sending the data...\n"); |
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98 return -1; |
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99 } |
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100 } |
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101 |
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102 //send the goodbye to the server side |
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103 if(localsocket != 0) |
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104 { |
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105 error = SendData(localsocket, goodbyebuffer); |
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106 if( error != OK_DATATRANSFER ) |
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107 { |
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108 //give up and return a message |
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109 printf("There was a problem when saying goodbye...\n"); |
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110 return -1; |
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111 } |
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112 } |
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113 else |
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114 { |
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115 printf("There was a problem with the socket...\n"); |
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116 return -1; |
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117 } |
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118 |
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119 return 0; |
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120 } |
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121 |
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122 //------------------------------------------------------------------------------ |
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123 //this sends the hello command to the client over the specified socket to initiate comms |
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124 int CXClient::SendData(int handle, char* aValue) |
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125 { |
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126 char c; //this is the buffer that is used to receive the data from across the link |
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127 char receivebuffer[MAXBUFFERLEN]; |
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128 |
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129 int counter = 0; |
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130 int bufferlength = 0; |
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131 int sendcounter = 0; |
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132 int err = -1; |
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133 |
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134 bool success = false; |
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135 memset(receivebuffer, 0, sizeof(receivebuffer)); //initialise |
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136 |
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137 bufferlength = strlen(aValue); |
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138 |
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139 //send the data |
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140 while( sendcounter < MAXRETRIES ) |
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141 { |
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142 //write to the socket |
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143 err = WriteClient( handle, HT_SOCKET, aValue, bufferlength ); |
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144 |
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145 //if unable to send for some reason (verify that the error code is the length of one char) |
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146 if( err != bufferlength ) |
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147 { |
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148 printf("Data %s sending failed %d...\n", aValue, err); |
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149 sendcounter++; |
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150 } |
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151 else //print ok |
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152 { |
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153 printf("Data %s sending ok %d chars sent...\n", aValue, bufferlength); |
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154 sendcounter = MAXRETRIES; |
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155 //send an end of string character so the server can evaluate what has been received |
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156 WriteClient( handle, HT_SOCKET, "", 1 ); |
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157 } |
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158 } |
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159 |
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160 //receive the reply ONLY if send has succeeded (hence inside the maxretries limit) |
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161 if( ( sendcounter <= MAXRETRIES ) ) |
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162 { |
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163 while( 1 ) |
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164 { |
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165 err = ReadClient( handle, HT_SOCKET, &c ); |
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166 |
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167 if( strcmp( &c, "" ) == 0) |
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168 { |
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169 //if there was a problem with the read (i.e. invalid command received from server, knackered link) |
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170 if( ( err <= 0 ) || ( strcmp(receivebuffer, aValue) != 0 ) ) |
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171 { |
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172 printf("Data read failed ( device returned %s and receive code was %d )...\n", receivebuffer, err); |
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173 memset(receivebuffer, 0, sizeof(receivebuffer)); //reset |
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174 return ERROR_DATATRANSFER; |
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175 } |
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176 else |
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177 { |
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178 printf("Data read succeeded ( device returned %s )...\n", receivebuffer); |
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179 memset(receivebuffer, 0, sizeof(receivebuffer)); //reset |
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180 counter = 0; //reset |
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181 break; |
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182 } |
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183 } //if |
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184 |
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185 receivebuffer[counter++] = c; |
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186 } //while |
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187 } |
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188 |
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189 return OK_DATATRANSFER; |
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190 } |
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191 //------------------------------------------------------------------------------ |
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192 int CXClient::ReadClient(int handle, int handletype, char* c) |
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193 { |
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194 int err; |
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195 |
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196 assert( c != NULL ); |
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197 |
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198 // socket handles |
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199 if( handletype == HT_SOCKET ) |
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200 { |
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201 err = recv( handle, c, 1, 0 ); |
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202 if( err != 1 ) //if the single char has not been received |
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203 { |
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204 err = GetLastError(); |
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205 return err; |
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206 } |
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207 } |
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208 |
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209 // success |
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210 return err; |
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211 } |
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212 |
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213 //------------------------------------------------------------------------------ |
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214 int CXClient::WriteClient(int handle, int handletype, char *buff, int bufflen ) |
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215 { |
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216 int err = 0; |
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217 unsigned long bytes_written = 0; |
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218 |
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219 assert( buff != NULL ); |
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220 |
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221 // socket handles |
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222 if( handletype == HT_SOCKET ) |
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223 { |
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224 err = send( handle, buff, bufflen, 0 ); |
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225 if( err != bufflen ) |
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226 { |
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227 err = GetLastError(); |
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228 return err; |
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229 } |
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230 } |
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231 |
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232 return err; |
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233 } |
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234 |
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235 //------------------------------------------------------------------------------ |