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