root / logic / trunk / src / hci_comm / hci_comm_listener.c @ 61
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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 | 57 | alexbesir | #include "hciChanged.h" |
19 | 10 | Janez1 | |
20 | 57 | alexbesir | // Global variables from startup/main.c
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21 | extern pthread_mutex_t mtx;
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22 | extern int hciChanged; |
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23 | |||
24 | 10 | Janez1 | int listenTo(unsigned short int portNum) { |
25 | |||
26 | 51 | alexbesir | // Holders
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27 | 53 | alexbesir | char *attrVal;
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28 | char *name;
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29 | 54 | alexbesir | int responseLength;
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30 | 51 | alexbesir | |
31 | 10 | Janez1 | // Buffer
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32 | char *requestBuffer = malloc(HCI_COMM_REQUEST_BUFFER_SIZE * sizeof(char)); |
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33 | if(requestBuffer == NULL) { |
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34 | 53 | alexbesir | printf("HCI comm error: Cannot allocate buffer.\n");
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35 | 10 | Janez1 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
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36 | } |
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37 | 53 | alexbesir | char *responseBuffer = malloc(HCI_COMM_RESPONSE_BUFFER_SIZE * sizeof(char)); |
38 | if(responseBuffer == NULL) { |
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39 | printf("HCI comm error: Cannot allocate buffer.\n");
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40 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
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41 | } |
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42 | 57 | alexbesir | char *lineBuffer = malloc(HCI_COMM_LINE_BUFFER_SIZE * sizeof(char)); |
43 | if(lineBuffer == NULL) { |
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44 | printf("HCI comm error: Cannot allocate buffer.\n");
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45 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
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46 | } |
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47 | 10 | Janez1 | |
48 | // Socket holder
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49 | int socketHolder = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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50 | if(socketHolder < 0) { |
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51 | fprintf(stderr,"HCI comm error: Cannot create a new socket.\n");
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52 | return HCI_COMM_ERR_NEW_SOCKET_FAIL;
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53 | } |
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54 | |||
55 | // Socket address holder
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56 | struct sockaddr_in socketAddressHolder;
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57 | memset(&socketAddressHolder, 0, sizeof(socketAddressHolder)); |
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58 | socketAddressHolder.sin_family = AF_INET; |
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59 | socketAddressHolder.sin_port = htons(portNum); |
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60 | socketAddressHolder.sin_addr.s_addr = INADDR_ANY; |
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61 | |||
62 | // Bind socket to port
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63 | int bindingResult = bind(socketHolder,(struct sockaddr *)&socketAddressHolder, sizeof(socketAddressHolder)); |
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64 | if(bindingResult == -1) { |
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65 | fprintf(stderr,"HCI comm error: Cannot bind socket to port %d.\n",portNum);
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66 | close(socketHolder); |
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67 | return HCI_COMM_ERR_BIND_FAIL;
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68 | } |
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69 | |||
70 | // Listen to port
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71 | int listenResult = listen(socketHolder, 10); |
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72 | if(listenResult == -1) { |
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73 | 53 | alexbesir | printf("HCI comm error: Cannot listen to port %d.\n",portNum);
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74 | 10 | Janez1 | close(socketHolder); |
75 | return HCI_COMM_ERR_LISTEN_FAIL;
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76 | } |
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77 | |||
78 | // Infinite listening
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79 | while(1) { |
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80 | |||
81 | 57 | alexbesir | memset(responseBuffer,'\0',HCI_COMM_RESPONSE_BUFFER_SIZE);
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82 | memset(requestBuffer,'\0',HCI_COMM_REQUEST_BUFFER_SIZE);
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83 | memset(lineBuffer,'\0',HCI_COMM_LINE_BUFFER_SIZE);
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84 | responseLength = 0;
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85 | |||
86 | 53 | alexbesir | printf("[hci_comm_listener] Waiting for new connection...\n");
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87 | |||
88 | 10 | Janez1 | // Accept request
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89 | int connectionHolder = accept(socketHolder,NULL,NULL); |
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90 | if(connectionHolder < 0) { |
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91 | 53 | alexbesir | printf("HCI comm error: Error accepting request.\n");
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92 | 54 | alexbesir | shutdown(connectionHolder,SHUT_RDWR); |
93 | close(connectionHolder); |
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94 | continue;
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95 | 10 | Janez1 | } |
96 | |||
97 | 53 | alexbesir | printf("[hci_comm_listener] New connection accepted\n");
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98 | |||
99 | 10 | Janez1 | // Read request
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100 | int readResult = read(connectionHolder,requestBuffer,HCI_COMM_REQUEST_BUFFER_SIZE);
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101 | 53 | alexbesir | printf("[hci_comm_listener] Recieved request: %s \n",requestBuffer);
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102 | 10 | Janez1 | if(readResult < 0) { |
103 | 53 | alexbesir | printf("HCI comm error: Error reading request.\n");
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104 | 54 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Could not read request!</logic-response>");
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105 | responseLength = strlen(responseBuffer); |
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106 | write(connectionHolder,responseBuffer,responseLength); |
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107 | shutdown(connectionHolder,SHUT_RDWR); |
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108 | close(connectionHolder); |
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109 | continue;
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110 | 10 | Janez1 | } |
111 | |||
112 | 51 | alexbesir | // Parse request
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113 | mxml_node_t *tree; |
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114 | 53 | alexbesir | tree = mxmlLoadString(NULL, requestBuffer, MXML_NO_CALLBACK);
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115 | if(tree == NULL) { |
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116 | printf("[hci_comm_listener] Error parsing request!\n");
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117 | 54 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Could not parse request!</logic-response>");
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118 | responseLength = strlen(responseBuffer); |
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119 | write(connectionHolder,responseBuffer,responseLength); |
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120 | shutdown(connectionHolder,SHUT_RDWR); |
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121 | close(connectionHolder); |
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122 | continue;
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123 | 53 | alexbesir | } |
124 | printf("[hci_comm_listener] Request parsed\n");
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125 | 51 | alexbesir | |
126 | 10 | Janez1 | // Create a response
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127 | 53 | alexbesir | printf("[hci_comm_listener] Creating response\n");
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128 | 51 | alexbesir | mxml_node_t *node; |
129 | 53 | alexbesir | node = mxmlFindElement(tree, tree, "hci-request", NULL, NULL, MXML_DESCEND); |
130 | if(node == NULL) { |
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131 | 54 | alexbesir | printf("[hci_comm_listener] Request invalid! Sending error to client\n");
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132 | strcpy(responseBuffer,"<logic-response type=\"error\">Invalid request!</logic-response>");
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133 | responseLength = strlen(responseBuffer); |
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134 | write(connectionHolder,responseBuffer,responseLength); |
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135 | shutdown(connectionHolder,SHUT_RDWR); |
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136 | close(connectionHolder); |
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137 | continue;
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138 | 53 | alexbesir | } |
139 | printf("[hci_comm_listener] Main request node found\n");
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140 | printf("[hci_comm_listener] %d\n",node);
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141 | |||
142 | attrVal = (char *)malloc(sizeof(node->value.element.attrs->value)*strlen(mxmlElementGetAttr(node, "type"))); |
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143 | attrVal = mxmlElementGetAttr(node,"type");
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144 | printf("[hci_comm_listener] Got type\n");
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145 | 51 | alexbesir | if(strcmp(attrVal,"checkConnection") == 0) { |
146 | 53 | alexbesir | printf("[hci_comm_listener] checkConnection request\n");
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147 | strcpy(responseBuffer,"");
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148 | strcat(responseBuffer,"<logic-response type=\"checkConnection\"><data>");
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149 | mxml_node_t *child = node->child; |
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150 | child = child->child; |
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151 | strcat(responseBuffer,child->value.text.string); |
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152 | strcat(responseBuffer,"</data></logic-response>");
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153 | printf("[hci_comm_listener] Response formed: %s\n",responseBuffer);
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154 | responseLength = strlen(responseBuffer); |
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155 | printf("[hci_comm_listener] Response length formed: %d\n",responseLength);
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156 | 51 | alexbesir | } else if(strcmp(attrVal,"getConfig") == 0) { |
157 | 57 | alexbesir | printf("[hci_comm_listener] getConfig request\n");
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158 | 51 | alexbesir | // TODO
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159 | } else if(strcmp(attrVal,"setConfig") == 0) { |
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160 | 57 | alexbesir | printf("[hci_comm_listener] setConfig request\n");
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161 | 51 | alexbesir | // TODO
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162 | } else if(strcmp(attrVal,"getScenarios") == 0) { |
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163 | 57 | alexbesir | printf("[hci_comm_listener] getScenarios request\n");
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164 | FILE *fp; |
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165 | if(fp = fopen("./scenariotree.xml", "r")) { |
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166 | printf("[hci_comm_listener] File opened\n");
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167 | strcat(responseBuffer,"<logic-response type=\"getScenarios\">");
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168 | while(fgets(lineBuffer,HCI_COMM_LINE_BUFFER_SIZE,fp)) {
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169 | strcat(responseBuffer,lineBuffer); |
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170 | } |
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171 | strcat(responseBuffer,"</logic-response>");
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172 | responseLength = strlen(responseBuffer); |
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173 | fclose(fp); |
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174 | } else {
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175 | printf("[hci_comm_listener] Error: Can't open file scenariotree.xml\n");
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176 | strcpy(responseBuffer,"<logic-response type=\"error\">Could not read file!</logic-response>");
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177 | responseLength = strlen(responseBuffer); |
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178 | } |
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179 | 51 | alexbesir | } else if(strcmp(attrVal,"setScenarios") == 0) { |
180 | 57 | alexbesir | printf("[hci_comm_listener] setScenarios request\n");
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181 | // Prepare new content for scenariotree.xml
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182 | strncpy(lineBuffer,requestBuffer+54,strlen(requestBuffer)-(54+14+2)); |
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183 | strcpy(requestBuffer,"<?xml version=\"1.0\"?>");
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184 | strcat(requestBuffer,lineBuffer); |
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185 | FILE *fp; |
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186 | if(fp = fopen("./scenariotree.xml", "w")) { |
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187 | fputs(requestBuffer,fp); |
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188 | fclose(fp); |
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189 | pthread_mutex_lock(&mtx); |
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190 | hciChanged = HCI_CHANGED_SCENARIOS; |
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191 | pthread_mutex_unlock(&mtx); |
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192 | strcpy(responseBuffer,"<logic-response type=\"setScenarios\"></logic-response>");
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193 | responseLength = strlen(responseBuffer); |
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194 | } else {
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195 | printf("[hci_comm_listener] Error: Can't open file scenariotree.xml for writing\n");
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196 | strcpy(responseBuffer,"<logic-response type=\"error\">Could not write file!</logic-response>");
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197 | responseLength = strlen(responseBuffer); |
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198 | } |
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199 | 51 | alexbesir | } else if(strcmp(attrVal,"executeAction") == 0) { |
200 | 57 | alexbesir | printf("[hci_comm_listener] executeAction request\n");
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201 | 51 | alexbesir | // TODO
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202 | } else {
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203 | 53 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Invalid request!</logic-response>");
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204 | 51 | alexbesir | responseLength = 62;
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205 | } |
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206 | 10 | Janez1 | |
207 | // Check if logic wants to terminate the infinite loop
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208 | if(responseLength == HCI_COMM_TERMINATE) {
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209 | break;
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210 | } |
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211 | |||
212 | // Send response
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213 | 53 | alexbesir | int writeResult = write(connectionHolder,responseBuffer,responseLength);
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214 | printf("[hci_comm_listener] Written response to client\n");
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215 | 10 | Janez1 | if(writeResult < 0) { |
216 | 53 | alexbesir | printf("HCI comm error: Error writting response.\n");
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217 | 10 | Janez1 | } |
218 | |||
219 | 53 | alexbesir | // Close connection
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220 | free(attrVal); |
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221 | shutdown(connectionHolder,SHUT_RDWR); |
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222 | close(connectionHolder); |
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223 | |||
224 | printf("[hci_comm_listener] Connection closed\n");
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225 | |||
226 | 10 | Janez1 | } |
227 | |||
228 | // Terminate
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229 | close(socketHolder); |
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230 | free(requestBuffer); |
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231 | requestBuffer = NULL;
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232 | return HCI_COMM_TERMINATED_BY_LOGIC;
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233 | |||
234 | } |