1 | /* Virginia Tech Cognitive Radio Open Source Systems |
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2 | * Virginia Tech, 2009 |
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3 | * |
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4 | * LICENSE INFORMATION GOES HERE |
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5 | */ |
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6 | |
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7 | /* DESCRIPTION OF FILE. |
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8 | */ |
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9 | |
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10 | #include <cstdlib> |
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11 | #include <cstring> |
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12 | #include <stdint.h> |
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13 | |
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14 | #include "../../trunk/src/include/vtcross/common.h" |
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15 | #include "../../trunk/src/include/vtcross/components.h" |
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16 | #include "../../trunk/src/include/vtcross/containers.h" |
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17 | #include "../../trunk/src/include/vtcross/debug.h" |
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18 | #include "../../trunk/src/include/vtcross/error.h" |
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19 | #include "../../trunk/src/include/vtcross/socketcomm.h" |
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20 | |
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21 | |
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22 | #include <cstdlib> |
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23 | #include <cstring> |
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24 | #include <stdint.h> |
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25 | #include <math.h> |
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26 | |
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27 | |
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28 | #include <arpa/inet.h> |
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29 | #include <iostream> |
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30 | #include <netinet/in.h> |
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31 | #include <netdb.h> |
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32 | #include <fcntl.h> |
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33 | #include <sys/ioctl.h> |
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34 | #include <sys/mman.h> |
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35 | #include <sys/socket.h> |
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36 | #include <sys/types.h> |
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37 | #include <sys/wait.h> |
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38 | |
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39 | #include "../../trunk/src/include/tinyxml/tinyxml.h" |
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40 | #include "../../trunk/src/include/tinyxml/tinystr.h" |
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41 | |
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42 | |
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43 | |
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44 | |
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45 | ServiceManagementLayer::ServiceManagementLayer() |
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46 | { |
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47 | LOG("Creating Service Management Layer.\n"); |
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48 | shellSocketFD = -1; |
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49 | numberOfCognitiveEngines = 0; |
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50 | CE_Present = false; |
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51 | cogEngSrv = 1; |
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52 | |
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53 | Current_ID = 0; |
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54 | LoadConfiguration(); |
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55 | } |
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56 | |
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57 | |
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58 | ServiceManagementLayer::~ServiceManagementLayer() |
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59 | { |
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60 | } |
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61 | |
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62 | |
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63 | ServiceManagementLayer::ServiceManagementLayer(const char* serverName, \ |
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64 | const char* serverPort) |
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65 | { |
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66 | LOG("Creating Service Management Layer.\n"); |
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67 | |
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68 | ConnectToShell(serverName, serverPort); |
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69 | CE_List = new CE_Reg[10]; |
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70 | |
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71 | LoadConfiguration(); |
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72 | } |
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73 | |
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74 | |
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75 | void |
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76 | ServiceManagementLayer::SendComponentType() |
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77 | { |
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78 | SendMessage(shellSocketFD, "response_sml"); |
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79 | LOG("SML responded to GetRemoteComponentType query.\n"); |
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80 | } |
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81 | |
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82 | |
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83 | void |
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84 | ServiceManagementLayer::ConnectToShell(const char* serverName, \ |
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85 | const char* serverPort) |
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86 | { |
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87 | shellSocketFD = ClientSocket(serverName, serverPort); |
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88 | |
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89 | RegisterComponent(); |
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90 | } |
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91 | |
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92 | |
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93 | void |
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94 | ServiceManagementLayer::ShellSignalHandler() |
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95 | { |
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96 | char buffer[256]; |
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97 | |
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98 | memset(buffer, 0, 256); |
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99 | ReadMessage(shellSocketFD, buffer); |
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100 | |
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101 | // TODO |
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102 | // If we send integer op codes rather than strings, this process will be |
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103 | // MUCH faster since instead of donig string compares we can simply |
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104 | // switch on the integer value... |
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105 | if(strcmp(buffer, "register_service") == 0) { |
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106 | if(strcmp(buffer, "policy_geo") == 0) { |
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107 | } |
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108 | else if(strcmp(buffer, "policy_time") == 0) { |
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109 | } |
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110 | else if(strcmp(buffer, "policy_spectrum") == 0) { |
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111 | } |
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112 | else if(strcmp(buffer, "policy_spacial") == 0) { |
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113 | } |
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114 | } |
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115 | else if(strcmp(buffer, "deregister_service") == 0) { |
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116 | if(strcmp(buffer, "policy_geo") == 0) { |
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117 | } |
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118 | else if(strcmp(buffer, "policy_time") == 0) { |
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119 | } |
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120 | else if(strcmp(buffer, "policy_spectrum") == 0) { |
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121 | } |
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122 | else if(strcmp(buffer, "policy_spacial") == 0) { |
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123 | } |
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124 | } |
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125 | else if(strcmp(buffer, "query_component_type") == 0) { |
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126 | SendComponentType(); |
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127 | } |
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128 | else if(strcmp(buffer, "reset_sml") == 0) { |
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129 | Reset(); |
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130 | } |
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131 | else if(strcmp(buffer, "shutdown_sml") == 0) { |
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132 | Shutdown(); |
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133 | } |
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134 | } |
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135 | |
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136 | void |
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137 | ServiceManagementLayer::CESignalHandler(int32_t ID) |
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138 | { |
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139 | char buffer[256]; |
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140 | memset(buffer, 0, 256); |
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141 | // |
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142 | ReadMessage(cogEngSrv, buffer); |
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143 | if(strcmp(buffer, "register_engine_cognitive") == 0) { |
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144 | RegisterCognitiveEngine(ID); |
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145 | } |
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146 | |
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147 | |
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148 | } |
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149 | |
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150 | |
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151 | |
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152 | void |
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153 | ServiceManagementLayer::Shutdown() |
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154 | { |
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155 | DeregisterComponent(); |
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156 | } |
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157 | |
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158 | |
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159 | void |
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160 | ServiceManagementLayer::Reset() |
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161 | { |
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162 | DeregisterComponent(); |
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163 | LoadConfiguration(); |
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164 | } |
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165 | |
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166 | |
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167 | void |
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168 | ServiceManagementLayer::RegisterComponent() |
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169 | { |
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170 | SendMessage(shellSocketFD, "register_sml"); |
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171 | LOG("ServiceManagementLayer:: Registration message sent.\n"); |
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172 | } |
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173 | |
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174 | |
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175 | void |
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176 | ServiceManagementLayer::DeregisterComponent() |
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177 | { |
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178 | SendMessage(shellSocketFD, "deregister_sml"); |
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179 | LOG("ServiceManagementLayer:: Deregistration message sent.\n"); |
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180 | |
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181 | shutdown(shellSocketFD, 2); |
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182 | close(shellSocketFD); |
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183 | shellSocketFD = -1; |
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184 | LOG("ServiceManagementLayer:: Shell socket closed.\n"); |
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185 | } |
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186 | |
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187 | |
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188 | void |
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189 | ServiceManagementLayer::TransferRadioConfiguration(int32_t ID) |
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190 | { |
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191 | recvmsg |
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192 | while |
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193 | } |
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194 | |
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195 | |
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196 | void |
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197 | ServiceManagementLayer::TransferExperience(int32_t ID) |
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198 | { |
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199 | } |
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200 | |
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201 | |
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202 | void |
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203 | ServiceManagementLayer::ReceiveServices() |
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204 | { |
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205 | } |
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206 | |
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207 | |
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208 | void |
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209 | ServiceManagementLayer::SetActiveMission() |
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210 | { |
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211 | } |
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212 | |
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213 | |
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214 | void |
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215 | ServiceManagementLayer::ListServices() |
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216 | { |
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217 | } |
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218 | |
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219 | |
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220 | void |
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221 | ServiceManagementLayer::ReloadConfiguration() |
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222 | { |
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223 | LOG("ServiceManagementLayer:: Reloading Configuration.\n"); |
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224 | } |
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225 | |
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226 | |
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227 | void |
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228 | ServiceManagementLayer::LoadConfiguration() |
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229 | { |
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230 | LOG("ServiceManagementLayer:: Loading Configuration.\n"); |
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231 | } |
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232 | |
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233 | void |
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234 | ServiceManagementLayer::RegisterCognitiveEngine(int32_t ID) |
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235 | { |
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236 | SendMessage(shellSocketFD, "register_engine_cognitive"); |
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237 | LOG("Cognitive Engine:: Registration message sent to shell.\n"); |
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238 | |
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239 | TransferRadioConfiguration(socketFD); |
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240 | TransferExperience(socketFD); |
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241 | |
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242 | numberOfCognitiveEngines++; |
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243 | CE_Present = true; |
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244 | } |
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245 | |
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246 | |
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247 | void |
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248 | ServiceManagementLayer::DeregisterCognitiveEngine(int32_t ID) |
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249 | { |
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250 | LOG("Cognitive Radio Shell:: Received deregistration message from Cognitive Engine.\n"); |
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251 | |
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252 | numberOfCognitiveEngines--; |
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253 | if(numberOfCognitiveEngines == 0) |
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254 | CE_Present = false; |
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255 | |
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256 | SendMessage(socketFD, "deregister_ack"); |
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257 | shutdown(socketFD, 2); |
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258 | close(socketFD); |
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259 | LOG("Cognitive Radio Shell:: Socket closed.\n"); |
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260 | } |
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261 | |
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262 | void |
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263 | ServiceManagementLayer::StartSMLServer() |
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264 | { |
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265 | struct timeval selTimeout; |
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266 | int32_t running = 1; |
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267 | int32_t port, rc, new_sd = 1; |
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268 | int32_t desc_ready = 1; |
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269 | int32_t timeout = 10; |
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270 | fd_set sockSet; |
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271 | |
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272 | cogEngSrv = CreateTCPServerSocket(CEPort); |
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273 | int32_t maxDescriptor = cogEngSrv; |
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274 | |
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275 | if(InitializeTCPServerPort(cogEngSrv) == -1) |
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276 | ERROR(1,"Error initializing primary port\n"); |
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277 | |
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278 | while (running) { |
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279 | /* Zero socket descriptor vector and set for server sockets */ |
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280 | /* This must be reset every time select() is called */ |
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281 | FD_ZERO(&sockSet); |
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282 | FD_SET(cogEngSrv, &sockSet); |
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283 | |
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284 | /* Timeout specification */ |
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285 | /* This must be reset every time select() is called */ |
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286 | selTimeout.tv_sec = timeout; /* timeout (secs.) */ |
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287 | selTimeout.tv_usec = 0; /* 0 microseconds */ |
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288 | |
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289 | //Check if there is a message on the socket waiting to be read |
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290 | rc = select(cogEngSrv + 1, &sockSet, NULL, NULL, &selTimeout); |
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291 | if(rc == 0){ |
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292 | //If not, log that fact and check instead for messages from the shell |
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293 | LOG("No echo requests for %i secs...Server still alive\n", timeout); |
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294 | ShellSignalHandler(); |
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295 | } |
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296 | else { |
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297 | //If so, process the address information and pass the component ID on to the handler |
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298 | char buffer[256]; |
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299 | memset(buffer, 0, 256); |
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300 | struct sockaddr_in sock_addr; |
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301 | memset((void *) &sock_addr, 0, sizeof(sock_addr)); |
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302 | socklen_t sock_len; |
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303 | //Peak at the next message on the socket to determine its address of orgin |
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304 | recvfrom(cogEngSrv, buffer, 256, MSG_PEEK, (struct sockaddr*) &sock_addr, &sock_len); |
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305 | bool found = false; |
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306 | //Is it from a previously logged address? |
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307 | for(int i = 0; i < Current_ID; i++){ |
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308 | if((*CE_List[i].sock_ptr).sin_addr.s_addr == sock_addr.sin_addr.s_addr){ |
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309 | //If so, pass the ID number of that component into the signal handler to process the message |
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310 | found=true; |
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311 | CESignalHandler(i); |
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312 | } |
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313 | } |
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314 | //If not, log the address and pass the ID number of that component into the signal handler |
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315 | if(!found){ |
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316 | CE_List[Current_ID].sock_ptr = &sock_addr; |
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317 | CE_List[Current_ID].ID_num = Current_ID; |
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318 | CE_List[Current_ID].sock_len = sock_len; |
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319 | CESignalHandler(Current_ID); |
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320 | Current_ID++; |
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321 | } |
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322 | } |
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323 | } |
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324 | |
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325 | /* Close sockets */ |
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326 | close(cogEngSrv); |
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327 | |
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328 | return; |
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329 | } |
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330 | |
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331 | /* |
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332 | |
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333 | |
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334 | |
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335 | rc = select(cogEngSrv + 1, &sockSet, NULL, NULL, &selTimeout); |
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336 | if(rc == 0){ |
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337 | LOG("No echo requests for %i secs...Server still alive\n", timeout); |
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338 | ShellSignalHandler(); |
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339 | } |
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340 | else { |
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341 | desc_ready = rc; |
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342 | |
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343 | for(port = 0; port <= maxDescriptor && desc_ready > 0; port++) { |
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344 | if(FD_ISSET(port, &sockSet)) { |
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345 | desc_ready -= 1; |
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346 | |
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347 | //Check if request is new or on an existing open descriptor |
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348 | if(port == cogEngSrv) { |
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349 | do { |
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350 | new_sd = AcceptTCPConnection(port); |
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351 | if(new_sd < 0) |
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352 | break; |
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353 | |
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354 | CE_List[Current_ID].FD = new_sd; |
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355 | CE_List[Current_ID].IDNum = Current_ID; |
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356 | HandleMessage(CE_List[Current_ID]); |
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357 | Current_ID++; |
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358 | |
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359 | FD_SET(new_sd,&sockSet); |
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360 | if(new_sd > maxDescriptor) |
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361 | maxDescriptor = new_sd; |
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362 | //LOG("New incoming connection - %i\n\n",new_sd); |
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363 | } while(new_sd != -1); |
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364 | } |
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365 | else { |
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366 | //LOG("Request on already open descriptor.\n\n"); |
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367 | for(int16_t i = 0; i < Current_ID; i++) |
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368 | { |
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369 | if(CE_List[i].FD == port) |
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370 | HandleMessage(CE_List[i]); |
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371 | } |
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372 | } |
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373 | } |
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374 | } |
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375 | } |
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376 | */ |
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377 | |
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378 | |
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