1 | #include <iostream> |
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2 | #include <sys/types.h> |
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3 | #include <sys/wait.h> |
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4 | #include "tinyxml.h" |
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5 | #include "tinystr.h" |
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6 | #include "socket/ServerSocket.h" |
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7 | #include "socket/SocketException.h" |
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8 | |
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9 | using namespace std; |
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10 | |
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11 | #define SERVER_PORT 30000 |
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12 | |
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13 | struct CE_Info { |
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14 | int numUtilities; |
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15 | int numParameters; |
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16 | int numObservables; |
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17 | }; |
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18 | |
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19 | struct Utility { |
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20 | string name; |
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21 | string units; |
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22 | string goal; |
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23 | float target; |
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24 | float value; |
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25 | }; |
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26 | struct Affect { |
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27 | Utility * u; |
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28 | string relation; |
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29 | }; |
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30 | struct Parameter { |
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31 | string name; |
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32 | string units; |
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33 | float min; |
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34 | int numAffects; |
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35 | Affect affection_list[10]; |
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36 | float max; |
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37 | float step; |
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38 | float value; |
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39 | }; |
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40 | |
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41 | struct Observable { |
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42 | string name; |
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43 | Affect affection_list[10]; |
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44 | int numAffects; |
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45 | float value; |
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46 | }; |
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47 | |
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48 | void print_current_config(Utility * uList[], Parameter * pList[], Observable * oList[], CE_Info * ce_info) { |
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49 | int i = 0; |
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50 | int j = 0; |
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51 | |
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52 | for(i = 0; i < ce_info->numUtilities ; i++) { |
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53 | cout << "Utility: " << uList[i]->name << endl; |
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54 | cout << " Units: " << uList[i]->units << endl; |
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55 | cout << " Goal: " << uList[i]->goal << endl; |
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56 | cout << " Target: " << uList[i]->target << endl; |
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57 | } |
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58 | |
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59 | for(i = 0; i < ce_info->numParameters; i++) { |
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60 | cout << "Parameter: " << pList[i]->name << endl; |
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61 | cout << " Units: " << pList[i]->units << endl; |
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62 | cout << " Min: " << pList[i]->min << endl; |
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63 | cout << " Max: " << pList[i]->max << endl; |
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64 | cout << " Step: " << pList[i]->step << endl; |
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65 | for(j = 0; j < pList[i]->numAffects; j++) { |
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66 | cout << " Affect: " << pList[i]->affection_list[j].u->name << " -> " << pList[i]->affection_list[j].relation << endl; |
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67 | } |
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68 | } |
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69 | |
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70 | for(i = 0; i < ce_info->numObservables; i++) { |
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71 | cout << "Observable: " << oList[i]->name << endl; |
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72 | for(j = 0; j < oList[i]->numAffects; j++) { |
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73 | cout << " Affect: " << oList[i]->affection_list[j].u->name << " -> " << oList[i]->affection_list[j].relation << endl; |
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74 | } |
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75 | } |
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76 | } |
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77 | |
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78 | |
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79 | int parse_ce_config( TiXmlDocument * doc , Utility * u[], Parameter * p[], Observable * o[], CE_Info * ce_info) { |
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80 | |
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81 | TiXmlElement* pElem; //!current element |
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82 | TiXmlElement* pChild; //!current child of pElem |
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83 | TiXmlElement* pChild1; //!current child of pElem |
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84 | TiXmlElement* pSecondChild; //!current child of pElem |
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85 | TiXmlHandle hDoc(doc); //!handle to xml document |
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86 | TiXmlHandle hRoot(0); //! handle to root element |
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87 | |
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88 | int count = 0; |
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89 | int i = 0; |
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90 | int j = 0; |
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91 | int k = 0; |
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92 | int match_found = 0; |
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93 | |
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94 | pElem = hDoc.FirstChildElement().Element(); |
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95 | if(!pElem) { cout << "no valid root! quit-ing function!" << endl; return 0; } |
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96 | hRoot = TiXmlHandle(pElem); |
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97 | |
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98 | // Pull utility information from XML file. |
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99 | |
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100 | pElem = hRoot.FirstChild("utilities").Element(); |
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101 | pChild1 = hRoot.Child("utilities",count).Element(); |
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102 | |
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103 | |
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104 | for(pChild = pChild1->FirstChildElement("utility"); pChild; pChild = pChild->NextSiblingElement()) |
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105 | { |
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106 | u[i] = new Utility; |
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107 | const char *uName = pChild->Attribute("name"); |
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108 | if(uName) u[i]->name = uName; |
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109 | const char *uUnits = pChild->Attribute("units"); |
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110 | if(uUnits) u[i]->units = uUnits; |
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111 | const char *uGoal = pChild->Attribute("goal"); |
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112 | if(uGoal) u[i]->goal = uGoal; |
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113 | if(pChild->QueryFloatAttribute("target",&u[i]->target) != TIXML_SUCCESS) u[i]->target = -1; |
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114 | i++; |
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115 | } |
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116 | ce_info->numUtilities = i; |
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117 | cout << "Parsed " << ce_info->numUtilities << " utilities." << endl; |
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118 | |
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119 | // Pull observable information from XML file. |
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120 | i = 0; |
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121 | pElem = hRoot.FirstChild("observables").Element(); |
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122 | pChild1 = hRoot.Child("observables",count).Element(); |
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123 | |
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124 | for(pChild = pChild1->FirstChildElement("observable"); pChild; pChild = pChild->NextSiblingElement()) |
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125 | { |
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126 | |
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127 | const char *oName = pChild->Attribute("name"); |
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128 | o[i] = new Observable; |
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129 | |
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130 | if(oName) o[i]->name = oName; |
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131 | |
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132 | j = 0; |
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133 | for(pSecondChild = pChild->FirstChildElement("affect"); pSecondChild; pSecondChild = pSecondChild->NextSiblingElement()) |
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134 | { |
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135 | const char *oUtilName = pSecondChild->Attribute("utility"); |
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136 | |
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137 | // If a utility affects this parameter find the utility object and assign it |
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138 | if(oUtilName) { |
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139 | // Search for correct utility |
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140 | for( k=0 ; u[k]!=NULL ; k++ ){ |
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141 | if(u[k]->name == oUtilName) { |
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142 | o[i]->affection_list[j].u = u[k]; |
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143 | // Set relationship |
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144 | const char *oRelate = pSecondChild->Attribute("relationship"); |
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145 | if(oRelate) o[i]->affection_list[j].relation = oRelate; |
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146 | j++; |
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147 | match_found = 1; |
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148 | break; |
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149 | } |
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150 | } |
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151 | } |
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152 | if(!match_found) cout << "Error: " << o[i]->name << ": " << oUtilName << " not a valid utility: Affect not added." << endl; |
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153 | match_found = 0; |
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154 | } |
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155 | o[i]->numAffects = j; |
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156 | i++; |
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157 | } |
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158 | ce_info->numObservables = i; |
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159 | cout << "Parsed " << ce_info->numObservables << " observables." << endl; |
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160 | |
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161 | |
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162 | // Pull parameter information from XML file. |
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163 | pElem = hRoot.FirstChild("parameters").Element(); |
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164 | pChild1 = hRoot.Child("parameters",count).Element(); |
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165 | |
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166 | i = 0; |
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167 | for(pChild = pChild1->FirstChildElement("parameter"); pChild; pChild = pChild->NextSiblingElement()) |
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168 | { |
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169 | p[i] = new Parameter; |
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170 | |
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171 | const char *pName = pChild->Attribute("name"); |
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172 | if(pName) p[i]->name = pName; |
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173 | const char *pUnits = pChild->Attribute("units"); |
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174 | if(pUnits) p[i]->units = pUnits; |
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175 | |
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176 | if(pChild->QueryFloatAttribute("min",&p[i]->min) != TIXML_SUCCESS) p[i]->min = -1; |
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177 | if(pChild->QueryFloatAttribute("max",&p[i]->max) != TIXML_SUCCESS) p[i]->max = -1; |
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178 | if(pChild->QueryFloatAttribute("step",&p[i]->step) != TIXML_SUCCESS) p[i]->step = -1; |
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179 | |
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180 | j = 0; |
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181 | for(pSecondChild = pChild->FirstChildElement("affect"); pSecondChild; pSecondChild = pSecondChild->NextSiblingElement()) |
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182 | { |
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183 | const char *pUtilName = pSecondChild->Attribute("utility"); |
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184 | |
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185 | // If a utility affects this parameter find the utility object and assign it |
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186 | if(pUtilName) { |
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187 | // Search for correct utility |
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188 | for( k=0 ; u[k]!=NULL ; k++ ){ |
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189 | if(u[k]->name == pUtilName) { |
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190 | // If match found, assign it to this index |
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191 | p[i]->affection_list[j].u = u[k]; |
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192 | const char *pRelate = pSecondChild->Attribute("relationship"); |
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193 | if(pRelate) { |
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194 | p[i]->affection_list[j].relation = pRelate; |
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195 | } else { |
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196 | cout << "Error: No relation found." << endl; |
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197 | } |
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198 | match_found = 1; |
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199 | j++; |
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200 | break; |
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201 | } |
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202 | } |
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203 | } |
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204 | if(!match_found) cout << "Error: " << p[i]->name << ": " << pUtilName << " not a valid utility: Affect not added." << endl; |
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205 | match_found = 0; |
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206 | } |
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207 | p[i]->numAffects = j; |
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208 | i++; |
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209 | |
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210 | } |
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211 | ce_info->numParameters = i; |
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212 | cout << "Parsed " << ce_info->numParameters << " parameters." << endl; |
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213 | return 1; |
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214 | } |
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215 | |
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216 | |
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217 | void error(char *msg) |
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218 | { |
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219 | perror(msg); |
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220 | exit(1); |
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221 | } |
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222 | |
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223 | |
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224 | int ReceiveMessage(int socket,char * buffer) |
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225 | { |
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226 | int i,n; |
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227 | |
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228 | n = recv(socket,buffer,256,MSG_PEEK); |
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229 | for(i=0;i<256;i++){ |
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230 | if(strcmp(&buffer[i],"\0") == 0) break; |
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231 | } |
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232 | n = recv(socket,buffer,i+1,0); |
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233 | if (n < 0) |
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234 | error("ERROR reading from socket"); |
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235 | // printf("ReadMessage:%s %d\n",buffer,n); |
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236 | |
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237 | return n; |
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238 | } |
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239 | |
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240 | |
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241 | int SendMessage(int socketfd, string message) { |
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242 | int n; |
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243 | |
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244 | message.append("\0"); |
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245 | // Write message back to client |
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246 | n = write(socketfd,message.c_str(),(message.size()+1)); |
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247 | if (n<0) |
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248 | error("Error sending to client\n"); |
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249 | if(n == 0) |
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250 | printf("Client closed the socket.\n"); |
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251 | |
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252 | //printf("SendMessage:%s %d\n",message.c_str(),n); |
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253 | return n; |
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254 | } |
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255 | |
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256 | void GetEnvironment() { |
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257 | |
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258 | } |
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259 | |
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260 | void Policy_ValidateSettings() { |
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261 | |
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262 | } |
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263 | |
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264 | |
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265 | void LoadCEConfiguration(int socketfd,Utility * uList[], Parameter * pList[], Observable * oList[], CE_Info * ce_info){ |
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266 | int n,i,j; |
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267 | char counter[55]; |
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268 | char var[50]; |
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269 | //int total_bytes; |
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270 | |
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271 | printf("Sending configuration to CE.\n"); |
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272 | |
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273 | // utilities |
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274 | // Send number of utilities |
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275 | sprintf(counter,"%d",ce_info->numUtilities); |
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276 | SendMessage(socketfd,counter); |
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277 | // send utility |
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278 | for(i = 0; i < ce_info->numUtilities; i++) { |
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279 | SendMessage(socketfd,uList[i]->name); |
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280 | SendMessage(socketfd,uList[i]->units); |
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281 | SendMessage(socketfd,uList[i]->goal); |
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282 | sprintf(var,"%f",uList[i]->target); |
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283 | SendMessage(socketfd,var); |
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284 | } |
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285 | |
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286 | // parameters |
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287 | sprintf(counter,"%i",ce_info->numParameters); |
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288 | SendMessage(socketfd,counter); |
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289 | for(i = 0; i < ce_info->numParameters; i++) { |
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290 | SendMessage(socketfd,pList[i]->name); |
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291 | SendMessage(socketfd,pList[i]->units); |
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292 | sprintf(var,"%f",pList[i]->min); |
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293 | SendMessage(socketfd,var); |
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294 | sprintf(var,"%f",pList[i]->max); |
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295 | SendMessage(socketfd,var); |
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296 | sprintf(var,"%f",pList[i]->step); |
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297 | SendMessage(socketfd,var); |
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298 | |
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299 | sprintf(counter,"%i",pList[i]->numAffects); |
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300 | SendMessage(socketfd,counter); |
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301 | for(j = 0; j < pList[i]->numAffects; j++) { |
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302 | SendMessage(socketfd,pList[i]->affection_list[j].u->name); |
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303 | SendMessage(socketfd,pList[i]->affection_list[j].relation); |
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304 | } |
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305 | } |
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306 | |
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307 | // observables |
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308 | sprintf(counter,"%i",ce_info->numObservables); |
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309 | SendMessage(socketfd,counter); |
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310 | for(i = 0; i < ce_info->numObservables; i++) { |
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311 | SendMessage(socketfd,oList[i]->name); |
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312 | |
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313 | sprintf(counter,"%i",oList[i]->numAffects); |
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314 | SendMessage(socketfd,counter); |
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315 | for(j = 0; j < oList[i]->numAffects; j++) { |
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316 | SendMessage(socketfd,oList[i]->affection_list[j].u->name); |
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317 | SendMessage(socketfd,oList[i]->affection_list[j].relation); |
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318 | } |
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319 | } |
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320 | |
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321 | printf("Configuration sent, waiting for ACK...\n"); |
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322 | // Receive ACK for utils |
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323 | char buffer[256]; |
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324 | string message; |
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325 | n = ReceiveMessage(socketfd, buffer); |
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326 | printf("%s\n", buffer); |
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327 | //cout << message << endl; |
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328 | printf("ACK received.\n"); |
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329 | |
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330 | } |
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331 | |
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332 | void UpdateCEConfiguration() { |
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333 | |
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334 | } |
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335 | |
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336 | void ResetCEConfiguration(){ |
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337 | |
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338 | } |
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339 | |
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340 | void UpdateCEExperience(int socketfd, int num_rows, int num_cols, |
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341 | float * past_exp[]) |
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342 | { |
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343 | char buffer[256]; |
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344 | int i, j; |
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345 | char counter[55]; |
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346 | char var[50]; |
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347 | |
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348 | for (i = 0; i < num_rows; i++){ |
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349 | for (j = 0; j< num_cols; j++){ |
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350 | sprintf(var,"%f",past_exp[i][j]); |
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351 | //printf("%f, \n", past_exp[i][j]); |
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352 | //printf("%s, \n", var); |
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353 | } |
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354 | } |
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355 | |
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356 | // send the number of rows to the ce first |
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357 | sprintf(counter,"%d",num_rows); |
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358 | SendMessage(socketfd,counter); |
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359 | // send the number of columns to the ce |
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360 | sprintf(counter,"%d",num_cols); |
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361 | SendMessage(socketfd,counter); |
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362 | // update ce with experience |
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363 | for (i = 0; i < num_rows; i++){ |
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364 | for (j = 0; j< num_cols; j++){ |
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365 | sprintf(var,"%f",past_exp[i][j]); |
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366 | SendMessage(socketfd,var); |
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367 | } |
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368 | } |
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369 | |
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370 | printf("experience sent\n"); |
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371 | } |
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372 | |
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373 | void ResetCEExperience() { |
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374 | |
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375 | } |
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376 | |
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377 | // Update operating settings |
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378 | // This function will interact with the hardware "drivers" |
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379 | void UpdateRadioSettings() |
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380 | { |
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381 | } |
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382 | |
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383 | int RequestCEOptimization(int sockfd, Utility *uList[], |
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384 | Parameter *pList[], Observable *oList[], |
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385 | CE_Info *ce_info) |
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386 | { |
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387 | char buffer[256]; |
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388 | int i; |
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389 | float var; |
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390 | |
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391 | /*// utility |
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392 | for (i = 0; i < ce_info->numUtilities; i++){ |
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393 | bzero(buffer,256); |
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394 | ReceiveMessage(sockfd,buffer); |
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395 | var = atof(buffer); |
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396 | uList[i]->value = var; |
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397 | printf("utility %s, value %f\n" |
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398 | , uList[i]->name.c_str(), uList[i]->value); |
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399 | }*/ |
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400 | |
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401 | // paramter |
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402 | for (i = 0; i < ce_info->numParameters; i++){ |
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403 | bzero(buffer,256); |
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404 | ReceiveMessage(sockfd,buffer); |
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405 | var = atof(buffer); |
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406 | pList[i]->value = var; |
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407 | printf("parameter %s, value %f\n" |
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408 | , pList[i]->name.c_str(), pList[i]->value); |
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409 | } |
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410 | |
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411 | /*// observable |
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412 | for (i = 0; i < ce_info->numObservables; i++){ |
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413 | bzero(buffer,256); |
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414 | ReceiveMessage(sockfd,buffer); |
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415 | var = atof(buffer); |
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416 | oList[i]->value = var; |
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417 | printf("observable %s, value %f\n" |
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418 | , oList[i]->name.c_str(), oList[i]->value); |
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419 | }*/ |
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420 | |
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421 | return 1; |
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422 | } |
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423 | |
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424 | void RunSimulator(int socketfd, Utility * uList[], |
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425 | Parameter * pList[], Observable * oList[], |
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426 | CE_Info * ce_info) { |
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427 | |
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428 | float **past_exp; |
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429 | int num_rows, num_cols; |
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430 | |
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431 | // Set fake current environment params = current environment |
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432 | RequestCEOptimization(socketfd, uList, pList, oList, ce_info); |
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433 | |
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434 | // Act like we are updating the hardware tranmission settings |
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435 | UpdateRadioSettings(); |
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436 | |
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437 | // Send back fake utility values |
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438 | // need to initialize |
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439 | //UpdateCEExperience(socketfd, num_rows, num_cols, past_exp); |
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440 | } |
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441 | |
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442 | void StartMessaging(int socketfd, Utility * uList[], Parameter * pList[], Observable * oList[], CE_Info * ce_info) |
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443 | { |
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444 | LoadCEConfiguration(socketfd, uList, pList, oList, ce_info); |
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445 | |
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446 | // cr experience |
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447 | float **past_exp; |
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448 | int num_cols; |
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449 | // get number of columns |
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450 | num_cols = ce_info->numUtilities + ce_info->numParameters; |
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451 | num_cols = num_cols + ce_info->numObservables; |
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452 | num_cols = num_cols + 1; // overall utility |
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453 | int num_rows = 2; |
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454 | past_exp = (float **)malloc(sizeof(float)*num_rows); |
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455 | int i; |
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456 | for (i=0; i<num_rows; i++){ |
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457 | past_exp[i] = (float*)malloc(sizeof(float)*num_cols); |
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458 | } |
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459 | // sample experience #1 |
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460 | past_exp[0][0] = 1e3f; // throughput |
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461 | past_exp[0][1] = 1; // spectral_efficiency |
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462 | past_exp[0][2] = -3.5; // log10_ber |
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463 | past_exp[0][3] = 1; // mod_scheme |
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464 | past_exp[0][4] = -10; // tx_power |
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465 | past_exp[0][5] = 10.0; // SNR |
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466 | past_exp[0][6] = 0.762; // overall utility*/ |
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467 | // sample experience #2 |
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468 | past_exp[1][0] = 1e2f; // throughput |
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469 | past_exp[1][1] = 1; // spectral_efficiency |
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470 | past_exp[1][2] = -3.5; // log10_ber |
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471 | past_exp[1][3] = 1; // mod_scheme |
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472 | past_exp[1][4] = -14; // tx_power |
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473 | past_exp[1][5] = 3.0; // SNR |
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474 | past_exp[1][6] = 0.462; // overall utility |
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475 | |
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476 | |
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477 | // update ce with experience |
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478 | UpdateCEExperience(socketfd, num_rows, num_cols, past_exp); |
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479 | |
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480 | RunSimulator(socketfd, uList, pList, oList, ce_info); |
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481 | } |
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482 | |
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483 | int StartShell(int port,Utility * uList[], Parameter * pList[], Observable * oList[], CE_Info * ce_info) { |
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484 | // Start socket server |
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485 | int sockfd, newsockfd, clilen; |
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486 | struct sockaddr_in serv_addr, cli_addr; |
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487 | |
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488 | // Setup server socket connection |
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489 | sockfd = socket(AF_INET, SOCK_STREAM, 0); |
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490 | if (sockfd < 0) |
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491 | error("ERROR opening socket"); |
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492 | bzero((char *) &serv_addr, sizeof(serv_addr)); |
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493 | serv_addr.sin_family = AF_INET; |
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494 | serv_addr.sin_port = htons(port); |
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495 | serv_addr.sin_addr.s_addr = INADDR_ANY; |
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496 | if (bind(sockfd, (struct sockaddr *) &serv_addr, |
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497 | sizeof(serv_addr)) < 0) |
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498 | error("ERROR on binding"); |
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499 | listen(sockfd,5); |
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500 | clilen = sizeof(cli_addr); |
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501 | |
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502 | //while(1) { |
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503 | newsockfd = accept(sockfd, |
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504 | (struct sockaddr *) &cli_addr, |
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505 | (socklen_t*)&clilen); |
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506 | if (newsockfd < 0) |
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507 | error("ERROR on accept"); |
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508 | |
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509 | // Begin parsing the messages |
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510 | StartMessaging(newsockfd, uList, pList, oList, ce_info); |
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511 | //} |
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512 | return 0; |
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513 | } |
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514 | |
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515 | int main(int argc, char* argv[]) { |
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516 | |
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517 | |
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518 | // CognitiveEngine CE; |
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519 | // CognitiveEngineShell Shell; |
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520 | string pFilename; |
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521 | int pid; |
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522 | |
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523 | Utility * uList[10]; |
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524 | Parameter * pList[10]; |
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525 | Observable * oList[10]; |
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526 | CE_Info ce_info; |
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527 | |
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528 | if(argc < 2) { |
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529 | cout << "Warning no XML file specific using default: example.xml" << endl; |
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530 | pFilename = "example.xml"; |
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531 | } else { |
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532 | pFilename = argv[1]; |
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533 | } |
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534 | |
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535 | TiXmlDocument doc( pFilename.c_str() ); |
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536 | bool loadOkay = doc.LoadFile(); |
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537 | if (!loadOkay) |
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538 | { |
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539 | cout << "Loading " << pFilename << " failed." << endl; |
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540 | return 0; |
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541 | } |
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542 | |
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543 | cout << "Attemping to parse " << pFilename << "." << endl; |
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544 | parse_ce_config( &doc , uList, pList, oList, &ce_info); |
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545 | cout << "Configuration file parsing completed." << endl; |
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546 | |
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547 | //print_current_config(uList, pList, oList, &ce_info); |
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548 | |
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549 | pid = fork(); |
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550 | if(pid == 0) { |
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551 | // In child process - open policy engine port. |
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552 | // StartShell(30000,uList, pList, oList, &ce_info); |
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553 | } else { |
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554 | // In parent process - open cognitive engine port. |
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555 | StartShell(30001,uList, pList, oList, &ce_info); |
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556 | } |
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557 | |
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558 | |
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559 | return 1; |
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560 | } |
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