[207] | 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 | |
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| 11 | #include <cstdlib> |
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| 12 | #include <cstring> |
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| 13 | #include <stdint.h> |
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[212] | 14 | #include <string> |
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[207] | 15 | |
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| 16 | #include <arpa/inet.h> |
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| 17 | #include <iostream> |
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| 18 | #include <netinet/in.h> |
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| 19 | #include <netdb.h> |
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| 20 | #include <fcntl.h> |
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| 21 | #include <sys/ioctl.h> |
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| 22 | #include <sys/mman.h> |
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| 23 | #include <sys/socket.h> |
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| 24 | #include <sys/types.h> |
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| 25 | #include <sys/wait.h> |
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| 26 | |
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| 27 | #include "tinyxml/tinyxml.h" |
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| 28 | #include "tinyxml/tinystr.h" |
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| 29 | |
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| 30 | #include "vtcross/common.h" |
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| 31 | #include "vtcross/components.h" |
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| 32 | #include "vtcross/containers.h" |
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| 33 | #include "vtcross/debug.h" |
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| 34 | #include "vtcross/error.h" |
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| 35 | #include "vtcross/socketcomm.h" |
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| 36 | |
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| 37 | |
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| 38 | CognitiveRadioShell::CognitiveRadioShell() |
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| 39 | { |
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| 40 | LOG("Creating Cognitive Radio Shell.\n"); |
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| 41 | SML_present = false; |
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| 42 | PE_present = false; |
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| 43 | CE_present = false; |
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[213] | 44 | |
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| 45 | // TODO =BUG= The params, observables, and utils arrays are not being |
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| 46 | // allocated here. If an shell object is constructed, and then immediately |
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| 47 | // destructed, there will be no allocated memory, and the delete operater |
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| 48 | // will receive a null pointer, which will segfault. |
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[207] | 49 | } |
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| 50 | |
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| 51 | |
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| 52 | CognitiveRadioShell::~CognitiveRadioShell() |
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| 53 | { |
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[213] | 54 | delete [] params; |
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| 55 | delete [] observables; |
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| 56 | delete [] utils; |
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[207] | 57 | } |
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| 58 | |
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| 59 | |
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| 60 | CognitiveRadioShell::CognitiveRadioShell(const char* radioConfig, int16_t p1, \ |
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| 61 | int16_t p2, int16_t p3) |
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| 62 | { |
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| 63 | LOG("Creating Cognitive Radio Shell.\n"); |
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| 64 | |
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[213] | 65 | params = new Parameter[10]; |
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| 66 | observables = new Observable[10]; |
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| 67 | utils = new Utility[10]; |
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[207] | 68 | radio_info = new Radio_Info; |
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| 69 | |
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[213] | 70 | LoadRadioConfiguration(radioConfig, params, utils, observables, radio_info); |
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[207] | 71 | |
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| 72 | primaryPort = p1; |
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| 73 | policyPort = p2; |
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| 74 | commandPort = p3; |
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| 75 | } |
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| 76 | |
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| 77 | |
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| 78 | void |
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| 79 | CognitiveRadioShell::SendComponentType(int32_t socketFD) |
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| 80 | { |
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| 81 | SendMessage(socketFD, "response_shell"); |
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| 82 | LOG("Cognitive Radio Shell responded to GetRemoteComponentType query.\n"); |
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| 83 | } |
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| 84 | |
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[209] | 85 | |
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[212] | 86 | std::string |
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| 87 | CognitiveRadioShell::GetRemoteComponentType(int32_t socketFD) |
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| 88 | { |
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| 89 | SendMessage(socketFD, "request_component_type"); |
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| 90 | |
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| 91 | char buffer[256]; |
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| 92 | memset(buffer, 0, 256); |
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| 93 | ReadMessage(socketFD, buffer); |
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| 94 | |
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| 95 | return std::string(buffer); |
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| 96 | } |
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| 97 | |
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| 98 | |
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[207] | 99 | void |
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| 100 | CognitiveRadioShell::Shutdown() |
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| 101 | { |
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| 102 | // TODO should something else be happening here? |
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| 103 | } |
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| 104 | |
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| 105 | |
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| 106 | void |
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| 107 | CognitiveRadioShell::Reset() |
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| 108 | { |
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| 109 | LOG("Resetting Cognitive Radio Shell.\n"); |
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| 110 | } |
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| 111 | |
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| 112 | |
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| 113 | void |
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| 114 | CognitiveRadioShell::SendRadioConfiguration(int32_t socketFD) |
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| 115 | { |
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| 116 | LOG("Cognitive Radio Shell:: Sending radio configuration to Cognitive Engine.\n"); |
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| 117 | } |
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| 118 | |
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[209] | 119 | |
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[207] | 120 | void |
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| 121 | CognitiveRadioShell::SendRadioExperience(int32_t socketFD) |
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| 122 | { |
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| 123 | |
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| 124 | LOG("Cognitive Radio Shell:: Sending radio experience to Cognitive Engine.\n"); |
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| 125 | } |
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| 126 | |
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[209] | 127 | |
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[207] | 128 | void |
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| 129 | CognitiveRadioShell::RegisterCognitiveEngine(int32_t socketFD) |
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| 130 | { |
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| 131 | LOG("Cognitive Radio Shell:: Received registration message from Cognitive Engine.\n"); |
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| 132 | |
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| 133 | SendRadioConfiguration(socketFD); |
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| 134 | SendRadioExperience(socketFD); |
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| 135 | |
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| 136 | numberOfCognitiveEngines++; |
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| 137 | CE_present = true; |
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| 138 | } |
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| 139 | |
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[209] | 140 | |
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[207] | 141 | void |
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| 142 | CognitiveRadioShell::DeregisterCognitiveEngine(int32_t socketFD) |
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| 143 | { |
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| 144 | LOG("Cognitive Radio Shell:: Received deregistration message from Cognitive Engine.\n"); |
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| 145 | |
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| 146 | numberOfCognitiveEngines--; |
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| 147 | if(numberOfCognitiveEngines == 0) |
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[209] | 148 | CE_present = false; |
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[207] | 149 | |
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| 150 | SendMessage(socketFD, "deregister_ack"); |
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| 151 | shutdown(socketFD, 2); |
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| 152 | close(socketFD); |
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| 153 | LOG("Cognitive Radio Shell:: Socket closed.\n"); |
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| 154 | } |
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| 155 | |
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[209] | 156 | |
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[207] | 157 | void |
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| 158 | CognitiveRadioShell::RegisterPolicyEngine(int32_t socketFD) |
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| 159 | { |
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| 160 | LOG("Cognitive Radio Shell:: Received registration message from Policy Engine.\n"); |
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| 161 | PE_present = true; |
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| 162 | } |
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| 163 | |
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[209] | 164 | |
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[207] | 165 | void |
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| 166 | CognitiveRadioShell::DeregisterPolicyEngine(int32_t socketFD) |
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| 167 | { |
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| 168 | LOG("Cognitive Radio Shell:: Received deregistration message from Policy Engine.\n"); |
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| 169 | |
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| 170 | PE_present = false; |
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| 171 | |
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| 172 | SendMessage(socketFD, "deregister_ack"); |
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| 173 | shutdown(socketFD, 2); |
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| 174 | close(socketFD); |
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| 175 | LOG("Cognitive Radio Shell:: Socket closed.\n"); |
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| 176 | } |
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| 177 | |
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[209] | 178 | |
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[207] | 179 | void |
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| 180 | CognitiveRadioShell::RegisterSML(int32_t socketFD) |
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| 181 | { |
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| 182 | LOG("Cognitive Radio Shell:: Received registration message from SML.\n"); |
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| 183 | |
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| 184 | SML_present = true; |
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| 185 | } |
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| 186 | |
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[209] | 187 | |
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[207] | 188 | void |
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| 189 | CognitiveRadioShell::DeregisterSML(int32_t socketFD) |
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| 190 | { |
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| 191 | LOG("Cognitive Radio Shell:: Received deregistration message from SML.\n"); |
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| 192 | |
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| 193 | SML_present = false; |
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| 194 | |
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| 195 | SendMessage(socketFD, "deregister_ack"); |
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| 196 | shutdown(socketFD, 2); |
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| 197 | close(socketFD); |
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| 198 | LOG("Cognitive Radio Shell:: Socket closed.\n"); |
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| 199 | } |
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| 200 | |
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[209] | 201 | |
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[207] | 202 | int32_t |
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[209] | 203 | CognitiveRadioShell::LoadRadioConfiguration(const char* radioConfig, \ |
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| 204 | Parameter* &pList, Utility* &uList, Observable* &oList, \ |
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| 205 | Radio_Info* radioInfo) |
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[207] | 206 | { |
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| 207 | TiXmlElement *pElem; |
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| 208 | TiXmlElement *pChild; |
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| 209 | TiXmlElement *pChild1; |
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| 210 | TiXmlElement *pSecondChild; |
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| 211 | TiXmlHandle hRoot(0); |
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| 212 | |
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| 213 | int32_t count = 0; |
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| 214 | size_t item_count = 0; |
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| 215 | size_t affect_count = 0; |
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| 216 | int32_t attribute_count = 0; |
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| 217 | bool match_found = false; |
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| 218 | |
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| 219 | LOG("Cognitive Radio Shell:: Loading radio configuration.\n"); |
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| 220 | |
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| 221 | TiXmlDocument doc( radioConfig ); |
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| 222 | bool loadOkay = doc.LoadFile(); |
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[209] | 223 | if(!loadOkay) { |
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[207] | 224 | ERROR(1,"Loading radio configuration failed: %s\n", radioConfig); |
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| 225 | return -1; |
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| 226 | } |
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| 227 | |
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| 228 | TiXmlHandle hDoc(&doc); |
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| 229 | |
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| 230 | pElem = hDoc.FirstChildElement().Element(); |
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| 231 | |
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| 232 | if(!pElem) |
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| 233 | ERROR(1, "No valid root!"); |
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| 234 | |
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| 235 | hRoot = TiXmlHandle(pElem); |
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| 236 | |
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| 237 | pElem = hRoot.FirstChild("utilities").Element(); |
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| 238 | pChild1 = hRoot.Child("utilities", count).Element(); |
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| 239 | |
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| 240 | for(pChild = pChild1->FirstChildElement("utility"); pChild; \ |
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[209] | 241 | pChild = pChild->NextSiblingElement()) { |
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| 242 | |
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[207] | 243 | const char *uName = pChild->Attribute("name"); |
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| 244 | if(uName) |
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[208] | 245 | uList[item_count].name = uName; |
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[207] | 246 | |
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| 247 | const char *uUnits = pChild->Attribute("units"); |
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| 248 | if(uUnits) |
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| 249 | uList[item_count].units = uUnits; |
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| 250 | |
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| 251 | const char *uGoal = pChild->Attribute("goal"); |
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| 252 | if(uGoal) |
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| 253 | uList[item_count].goal = uGoal; |
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| 254 | |
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| 255 | if(pChild->QueryFloatAttribute("target", &uList[item_count].target) != TIXML_SUCCESS) |
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| 256 | uList[item_count].target = -1; |
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| 257 | |
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| 258 | item_count++; |
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| 259 | } |
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| 260 | |
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[208] | 261 | radio_info->numUtilities = item_count; |
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[207] | 262 | LOG("Cognitive Radio Shell:: Parsed %d utilities.\n", radioInfo->numUtilities); |
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| 263 | |
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| 264 | item_count = 0; |
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| 265 | pElem = hRoot.FirstChild("observables").Element(); |
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| 266 | pChild1 = hRoot.Child("observables", count).Element(); |
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| 267 | |
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| 268 | for(pChild = pChild1->FirstChildElement("observable"); pChild; \ |
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[209] | 269 | pChild = pChild->NextSiblingElement()) { |
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| 270 | |
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[207] | 271 | const char *oName = pChild->Attribute("name"); |
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| 272 | if(oName) |
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| 273 | oList[item_count].name = oName; |
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[208] | 274 | |
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[207] | 275 | affect_count = 0; |
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| 276 | for(pSecondChild = pChild->FirstChildElement("affect"); pSecondChild; \ |
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[209] | 277 | pSecondChild = pSecondChild->NextSiblingElement()) { |
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| 278 | |
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[207] | 279 | const char *oUtilName = pSecondChild->Attribute("utility"); |
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[209] | 280 | if(oUtilName) { |
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| 281 | for(attribute_count = 0; attribute_count < radio_info->numUtilities; attribute_count++ ) { |
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| 282 | if(uList[attribute_count].name == oUtilName) { |
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| 283 | |
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[207] | 284 | oList[item_count].affection_list[affect_count].u = &uList[attribute_count]; |
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| 285 | const char *oRelate = pSecondChild->Attribute("relationship"); |
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| 286 | if(oRelate) |
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| 287 | oList[item_count].affection_list[affect_count].relation = oRelate; |
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[209] | 288 | |
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[207] | 289 | affect_count++; |
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| 290 | match_found = true; |
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| 291 | break; |
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| 292 | } |
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| 293 | } |
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| 294 | } |
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| 295 | |
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| 296 | if(!match_found) { |
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| 297 | ERROR(1, "Error: %s: %s is not a valid utility.\n", \ |
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| 298 | oList[item_count].name.c_str(), oUtilName); |
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| 299 | } |
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| 300 | else |
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[208] | 301 | match_found = false; |
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[207] | 302 | } |
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| 303 | oList[item_count].numAffects = affect_count; |
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| 304 | item_count++; |
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| 305 | } |
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| 306 | |
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[208] | 307 | radioInfo->numObservables = item_count; |
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[207] | 308 | LOG("Cognitive Radio Shell:: Parsed %d observables.\n", radioInfo->numObservables); |
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| 309 | |
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| 310 | pElem = hRoot.FirstChild("parameters").Element(); |
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| 311 | pChild1 = hRoot.Child("parameters", count).Element(); |
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[208] | 312 | |
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[207] | 313 | item_count = 0; |
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| 314 | for(pChild = pChild1->FirstChildElement("parameter"); pChild; \ |
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[209] | 315 | pChild = pChild->NextSiblingElement()) { |
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| 316 | |
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[207] | 317 | const char *pName = pChild->Attribute("name"); |
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| 318 | if(pName) |
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[208] | 319 | pList[item_count].name = pName; |
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[207] | 320 | |
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| 321 | const char *pUnits = pChild->Attribute("units"); |
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| 322 | if(pUnits) |
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| 323 | pList[item_count].units = pUnits; |
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| 324 | |
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| 325 | if(pChild->QueryFloatAttribute("min", &pList[item_count].min) != TIXML_SUCCESS) |
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| 326 | pList[item_count].min = -1; |
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| 327 | |
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| 328 | if(pChild->QueryFloatAttribute("max", &pList[item_count].max) != TIXML_SUCCESS) |
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| 329 | pList[item_count].max = -1; |
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| 330 | |
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| 331 | if(pChild->QueryFloatAttribute("step", &pList[item_count].step) != TIXML_SUCCESS) |
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| 332 | pList[item_count].step = -1; |
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[208] | 333 | |
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[207] | 334 | affect_count = 0; |
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| 335 | for(pSecondChild = pChild->FirstChildElement("affect"); pSecondChild; \ |
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[209] | 336 | |
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| 337 | pSecondChild = pSecondChild->NextSiblingElement()) { |
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[207] | 338 | const char *pUtilName = pSecondChild->Attribute("utility"); |
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[209] | 339 | if(pUtilName) { |
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| 340 | for(attribute_count = 0; attribute_count < radio_info->numUtilities; attribute_count++) { |
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| 341 | if(uList[attribute_count].name == pUtilName) { |
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[208] | 342 | pList[item_count].affection_list[affect_count].u = &uList[attribute_count]; |
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[207] | 343 | |
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| 344 | const char *pRelate = pSecondChild->Attribute("relationship"); |
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| 345 | if(pRelate) |
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| 346 | pList[item_count].affection_list[affect_count].relation = pRelate; |
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| 347 | else |
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| 348 | LOG("Error: No relation found.\n"); |
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| 349 | |
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| 350 | match_found = true; |
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| 351 | affect_count++; |
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| 352 | break; |
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| 353 | } |
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| 354 | } |
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| 355 | } |
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| 356 | |
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[209] | 357 | if(!match_found) { |
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[207] | 358 | ERROR(1, "Error: %s: %s is not a valid utility.\n", \ |
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| 359 | pList[item_count].name.c_str(), pUtilName); |
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| 360 | } |
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| 361 | |
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[208] | 362 | match_found = false; |
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[207] | 363 | } |
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| 364 | |
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| 365 | pList[item_count].numAffects = affect_count; |
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| 366 | item_count++; |
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| 367 | } |
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| 368 | |
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| 369 | radioInfo->numParameters = item_count; |
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| 370 | LOG("Cognitive Radio Shell:: Parsed %d parameters.\n", radioInfo->numParameters); |
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| 371 | |
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| 372 | return 1; |
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| 373 | |
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| 374 | } |
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| 375 | |
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[209] | 376 | |
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[207] | 377 | void |
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| 378 | CognitiveRadioShell::GetOptimalParameters(int32_t socketFD) |
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| 379 | { |
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| 380 | } |
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| 381 | |
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[209] | 382 | |
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[207] | 383 | void |
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| 384 | CognitiveRadioShell::HandleMessage(int32_t socketFD) |
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| 385 | { |
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| 386 | char buffer[256]; |
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| 387 | |
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| 388 | ReadMessage(socketFD, buffer); |
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| 389 | |
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| 390 | if(strcmp(buffer,"register_engine_cognitive") == 0) { |
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[208] | 391 | RegisterCognitiveEngine(socketFD); |
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[207] | 392 | } else if(strcmp(buffer,"deregister_engine_cognitive") == 0) { |
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[208] | 393 | DeregisterCognitiveEngine(socketFD); |
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[207] | 394 | } else if(strcmp(buffer,"register_engine_policy") == 0) { |
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[208] | 395 | RegisterPolicyEngine(socketFD); |
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[207] | 396 | } else if(strcmp(buffer,"deregister_engine_policy") == 0) { |
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[208] | 397 | DeregisterPolicyEngine(socketFD); |
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[207] | 398 | } else if(strcmp(buffer,"register_sml") == 0) { |
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[208] | 399 | RegisterSML(socketFD); |
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[207] | 400 | } else if(strcmp(buffer,"deregister_sml") == 0) { |
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[208] | 401 | DeregisterSML(socketFD); |
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[207] | 402 | } else if(strcmp(buffer,"optimize") == 0) { |
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[208] | 403 | /* Receive optimization request and current environment */ |
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| 404 | GetOptimalParameters(socketFD); |
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[207] | 405 | } |
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| 406 | } |
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| 407 | |
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[209] | 408 | |
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[207] | 409 | void |
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| 410 | CognitiveRadioShell::StartShellServer() |
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| 411 | { |
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| 412 | struct timeval selTimeout; |
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| 413 | int32_t primary = 0; |
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| 414 | int32_t policy = 1; |
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| 415 | int32_t command = 2; |
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| 416 | int32_t running = 1; |
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| 417 | int32_t port, rc, new_sd = 1; |
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| 418 | int32_t desc_ready = 1; |
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| 419 | int32_t timeout = 10; |
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| 420 | fd_set sockSet; |
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| 421 | |
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[210] | 422 | int32_t *servSock = new int32_t[3]; |
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[207] | 423 | |
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| 424 | servSock[primary] = CreateTCPServerSocket(primaryPort); |
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| 425 | servSock[policy] = CreateTCPServerSocket(policyPort); |
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| 426 | servSock[command] = CreateTCPServerSocket(commandPort); |
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| 427 | |
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| 428 | int32_t maxDescriptor = servSock[command]; |
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| 429 | |
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| 430 | if(InitializeTCPServerPort(servSock[primary]) == -1) { |
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[208] | 431 | ERROR(1,"Error initializing primary port\n"); |
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| 432 | return; |
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[207] | 433 | } |
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| 434 | |
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| 435 | if(InitializeTCPServerPort(servSock[policy]) == -1) { |
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[208] | 436 | ERROR(1,"Error initializing policy port\n"); |
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| 437 | return; |
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[207] | 438 | } |
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| 439 | |
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| 440 | if(InitializeTCPServerPort(servSock[command]) == -1) { |
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[208] | 441 | ERROR(1,"Error initializing command port\n"); |
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| 442 | return; |
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[207] | 443 | } |
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| 444 | |
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[209] | 445 | while (running) { |
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[207] | 446 | /* Zero socket descriptor vector and set for server sockets */ |
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| 447 | /* This must be reset every time select() is called */ |
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| 448 | FD_ZERO(&sockSet); |
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| 449 | FD_SET(servSock[primary], &sockSet); |
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| 450 | FD_SET(servSock[policy], &sockSet); |
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| 451 | FD_SET(servSock[command], &sockSet); |
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| 452 | |
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| 453 | /* Timeout specification */ |
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| 454 | /* This must be reset every time select() is called */ |
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| 455 | selTimeout.tv_sec = timeout; /* timeout (secs.) */ |
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| 456 | selTimeout.tv_usec = 0; /* 0 microseconds */ |
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| 457 | |
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| 458 | /* Suspend program until descriptor is ready or timeout */ |
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| 459 | rc = select(maxDescriptor + 1, &sockSet, NULL, NULL, &selTimeout); |
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[209] | 460 | if(rc == 0) |
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[207] | 461 | LOG("No echo requests for %i secs...Server still alive\n", timeout); |
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[209] | 462 | else { |
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[207] | 463 | desc_ready = rc; |
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| 464 | |
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[209] | 465 | for(port = 0; port <= maxDescriptor && desc_ready > 0; port++) { |
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| 466 | if(FD_ISSET(port, &sockSet)) { |
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| 467 | desc_ready -= 1; |
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[207] | 468 | |
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| 469 | /* Check if request is new or on an existing open descriptor */ |
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[209] | 470 | if((port == servSock[primary]) || (port == servSock[policy]) || (port == servSock[command])) { |
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| 471 | do { |
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[207] | 472 | new_sd = AcceptTCPConnection(port); |
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| 473 | if(new_sd < 0) |
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| 474 | break; |
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| 475 | |
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| 476 | HandleMessage(new_sd); |
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| 477 | FD_SET(new_sd,&sockSet); |
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| 478 | if(new_sd > maxDescriptor) |
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| 479 | maxDescriptor = new_sd; |
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| 480 | //LOG("New incoming connection - %i\n\n",new_sd); |
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| 481 | } while(new_sd != -1); |
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[209] | 482 | } |
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| 483 | else { |
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[207] | 484 | //LOG("Request on already open descriptor.\n\n"); |
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| 485 | HandleMessage(port); |
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| 486 | } |
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| 487 | } |
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| 488 | } |
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| 489 | } |
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| 490 | } |
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| 491 | |
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| 492 | |
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| 493 | /* Close sockets */ |
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| 494 | close(servSock[primary]); |
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| 495 | close(servSock[policy]); |
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| 496 | close(servSock[command]); |
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| 497 | |
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| 498 | /* Free list of sockets */ |
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[210] | 499 | delete servSock; |
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[207] | 500 | |
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| 501 | return; |
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| 502 | } |
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