root / logic / trunk / src / hci_comm / hci_comm_listener.c @ 54
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1 | 10 | Janez1 | /*
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2 | * hci_comm_listener.c
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3 | *
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4 | * 2011, Aleksander Besir (alex.besir@gmail.com)
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5 | *
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6 | */
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7 | |||
8 | #include "hci_comm.h" |
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9 | #include <sys/types.h> |
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10 | #include <sys/socket.h> |
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11 | #include <netinet/in.h> |
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12 | #include <arpa/inet.h> |
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13 | #include <stdio.h> |
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14 | #include <stdlib.h> |
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15 | #include <string.h> |
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16 | #include <unistd.h> |
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17 | 51 | alexbesir | #include "../mxml/mxml.h" |
18 | 10 | Janez1 | |
19 | int listenTo(unsigned short int portNum) { |
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20 | |||
21 | 51 | alexbesir | // Holders
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22 | 53 | alexbesir | char *attrVal;
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23 | char *name;
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24 | 54 | alexbesir | int responseLength;
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25 | 51 | alexbesir | |
26 | 10 | Janez1 | // Buffer
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27 | char *requestBuffer = malloc(HCI_COMM_REQUEST_BUFFER_SIZE * sizeof(char)); |
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28 | if(requestBuffer == NULL) { |
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29 | 53 | alexbesir | printf("HCI comm error: Cannot allocate buffer.\n");
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30 | 10 | Janez1 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
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31 | } |
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32 | 53 | alexbesir | char *responseBuffer = malloc(HCI_COMM_RESPONSE_BUFFER_SIZE * sizeof(char)); |
33 | if(responseBuffer == NULL) { |
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34 | printf("HCI comm error: Cannot allocate buffer.\n");
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35 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
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36 | } |
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37 | 10 | Janez1 | |
38 | // Socket holder
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39 | int socketHolder = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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40 | if(socketHolder < 0) { |
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41 | fprintf(stderr,"HCI comm error: Cannot create a new socket.\n");
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42 | return HCI_COMM_ERR_NEW_SOCKET_FAIL;
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43 | } |
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44 | |||
45 | // Socket address holder
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46 | struct sockaddr_in socketAddressHolder;
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47 | memset(&socketAddressHolder, 0, sizeof(socketAddressHolder)); |
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48 | socketAddressHolder.sin_family = AF_INET; |
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49 | socketAddressHolder.sin_port = htons(portNum); |
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50 | socketAddressHolder.sin_addr.s_addr = INADDR_ANY; |
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51 | |||
52 | // Bind socket to port
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53 | int bindingResult = bind(socketHolder,(struct sockaddr *)&socketAddressHolder, sizeof(socketAddressHolder)); |
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54 | if(bindingResult == -1) { |
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55 | fprintf(stderr,"HCI comm error: Cannot bind socket to port %d.\n",portNum);
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56 | close(socketHolder); |
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57 | return HCI_COMM_ERR_BIND_FAIL;
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58 | } |
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59 | |||
60 | // Listen to port
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61 | int listenResult = listen(socketHolder, 10); |
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62 | if(listenResult == -1) { |
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63 | 53 | alexbesir | printf("HCI comm error: Cannot listen to port %d.\n",portNum);
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64 | 10 | Janez1 | close(socketHolder); |
65 | return HCI_COMM_ERR_LISTEN_FAIL;
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66 | } |
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67 | |||
68 | // Infinite listening
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69 | while(1) { |
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70 | |||
71 | 53 | alexbesir | printf("[hci_comm_listener] Waiting for new connection...\n");
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72 | |||
73 | 10 | Janez1 | // Accept request
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74 | int connectionHolder = accept(socketHolder,NULL,NULL); |
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75 | if(connectionHolder < 0) { |
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76 | 53 | alexbesir | printf("HCI comm error: Error accepting request.\n");
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77 | 54 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Could not accept request!</logic-response>");
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78 | responseLength = strlen(responseBuffer); |
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79 | write(connectionHolder,responseBuffer,responseLength); |
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80 | shutdown(connectionHolder,SHUT_RDWR); |
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81 | close(connectionHolder); |
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82 | continue;
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83 | 10 | Janez1 | } |
84 | |||
85 | 53 | alexbesir | printf("[hci_comm_listener] New connection accepted\n");
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86 | |||
87 | 10 | Janez1 | // Read request
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88 | int readResult = read(connectionHolder,requestBuffer,HCI_COMM_REQUEST_BUFFER_SIZE);
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89 | 53 | alexbesir | printf("[hci_comm_listener] Recieved request: %s \n",requestBuffer);
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90 | 10 | Janez1 | if(readResult < 0) { |
91 | 53 | alexbesir | printf("HCI comm error: Error reading request.\n");
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92 | 54 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Could not read request!</logic-response>");
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93 | responseLength = strlen(responseBuffer); |
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94 | write(connectionHolder,responseBuffer,responseLength); |
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95 | shutdown(connectionHolder,SHUT_RDWR); |
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96 | close(connectionHolder); |
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97 | continue;
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98 | 10 | Janez1 | } |
99 | |||
100 | 51 | alexbesir | // Parse request
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101 | mxml_node_t *tree; |
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102 | 53 | alexbesir | tree = mxmlLoadString(NULL, requestBuffer, MXML_NO_CALLBACK);
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103 | if(tree == NULL) { |
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104 | printf("[hci_comm_listener] Error parsing request!\n");
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105 | 54 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Could not parse request!</logic-response>");
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106 | responseLength = strlen(responseBuffer); |
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107 | write(connectionHolder,responseBuffer,responseLength); |
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108 | shutdown(connectionHolder,SHUT_RDWR); |
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109 | close(connectionHolder); |
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110 | continue;
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111 | 53 | alexbesir | } |
112 | printf("[hci_comm_listener] Request parsed\n");
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113 | 51 | alexbesir | |
114 | 10 | Janez1 | // Create a response
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115 | 53 | alexbesir | printf("[hci_comm_listener] Creating response\n");
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116 | 51 | alexbesir | mxml_node_t *node; |
117 | 53 | alexbesir | node = mxmlFindElement(tree, tree, "hci-request", NULL, NULL, MXML_DESCEND); |
118 | if(node == NULL) { |
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119 | 54 | alexbesir | printf("[hci_comm_listener] Request invalid! Sending error to client\n");
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120 | strcpy(responseBuffer,"<logic-response type=\"error\">Invalid request!</logic-response>");
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121 | responseLength = strlen(responseBuffer); |
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122 | write(connectionHolder,responseBuffer,responseLength); |
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123 | shutdown(connectionHolder,SHUT_RDWR); |
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124 | close(connectionHolder); |
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125 | continue;
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126 | 53 | alexbesir | } |
127 | printf("[hci_comm_listener] Main request node found\n");
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128 | printf("[hci_comm_listener] %d\n",node);
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129 | |||
130 | attrVal = (char *)malloc(sizeof(node->value.element.attrs->value)*strlen(mxmlElementGetAttr(node, "type"))); |
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131 | attrVal = mxmlElementGetAttr(node,"type");
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132 | printf("[hci_comm_listener] Got type\n");
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133 | 51 | alexbesir | if(strcmp(attrVal,"checkConnection") == 0) { |
134 | 53 | alexbesir | printf("[hci_comm_listener] checkConnection request\n");
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135 | strcpy(responseBuffer,"");
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136 | strcat(responseBuffer,"<logic-response type=\"checkConnection\"><data>");
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137 | mxml_node_t *child = node->child; |
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138 | child = child->child; |
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139 | strcat(responseBuffer,child->value.text.string); |
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140 | strcat(responseBuffer,"</data></logic-response>");
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141 | printf("[hci_comm_listener] Response formed: %s\n",responseBuffer);
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142 | responseLength = strlen(responseBuffer); |
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143 | printf("[hci_comm_listener] Response length formed: %d\n",responseLength);
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144 | 51 | alexbesir | } else if(strcmp(attrVal,"getConfig") == 0) { |
145 | // TODO
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146 | } else if(strcmp(attrVal,"setConfig") == 0) { |
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147 | // TODO
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148 | } else if(strcmp(attrVal,"getScenarios") == 0) { |
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149 | // TODO
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150 | } else if(strcmp(attrVal,"setScenarios") == 0) { |
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151 | // TODO
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152 | } else if(strcmp(attrVal,"executeAction") == 0) { |
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153 | // TODO
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154 | } else {
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155 | 53 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Invalid request!</logic-response>");
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156 | 51 | alexbesir | responseLength = 62;
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157 | } |
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158 | 10 | Janez1 | |
159 | // Check if logic wants to terminate the infinite loop
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160 | if(responseLength == HCI_COMM_TERMINATE) {
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161 | break;
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162 | } |
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163 | |||
164 | // Send response
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165 | 53 | alexbesir | int writeResult = write(connectionHolder,responseBuffer,responseLength);
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166 | printf("[hci_comm_listener] Written response to client\n");
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167 | 10 | Janez1 | if(writeResult < 0) { |
168 | 53 | alexbesir | printf("HCI comm error: Error writting response.\n");
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169 | 10 | Janez1 | } |
170 | |||
171 | 53 | alexbesir | // Close connection
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172 | free(attrVal); |
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173 | shutdown(connectionHolder,SHUT_RDWR); |
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174 | close(connectionHolder); |
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175 | |||
176 | printf("[hci_comm_listener] Connection closed\n");
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177 | |||
178 | 10 | Janez1 | } |
179 | |||
180 | // Terminate
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181 | close(socketHolder); |
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182 | free(requestBuffer); |
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183 | requestBuffer = NULL;
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184 | return HCI_COMM_TERMINATED_BY_LOGIC;
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185 | |||
186 | } |