root / logic / trunk / src / hci_comm / hci_comm_listener.c @ 89
History | View | Annotate | Download (8.77 KB)
1 | 10 | Janez1 | /*
|
---|---|---|---|
2 | * hci_comm_listener.c
|
||
3 | *
|
||
4 | * 2011, Aleksander Besir (alex.besir@gmail.com)
|
||
5 | *
|
||
6 | */
|
||
7 | |||
8 | #include "hci_comm.h" |
||
9 | #include <sys/types.h> |
||
10 | #include <sys/socket.h> |
||
11 | #include <netinet/in.h> |
||
12 | #include <arpa/inet.h> |
||
13 | #include <stdio.h> |
||
14 | #include <stdlib.h> |
||
15 | #include <string.h> |
||
16 | #include <unistd.h> |
||
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
|
21 | extern pthread_mutex_t mtx;
|
||
22 | extern int hciChanged; |
||
23 | |||
24 | 10 | Janez1 | int listenTo(unsigned short int portNum) { |
25 | |||
26 | 51 | alexbesir | // Holders
|
27 | 53 | alexbesir | char *attrVal;
|
28 | char *name;
|
||
29 | 54 | alexbesir | int responseLength;
|
30 | 51 | alexbesir | |
31 | 10 | Janez1 | // Buffer
|
32 | char *requestBuffer = malloc(HCI_COMM_REQUEST_BUFFER_SIZE * sizeof(char)); |
||
33 | if(requestBuffer == NULL) { |
||
34 | 53 | alexbesir | printf("HCI comm error: Cannot allocate buffer.\n");
|
35 | 10 | Janez1 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
|
36 | } |
||
37 | 53 | alexbesir | char *responseBuffer = malloc(HCI_COMM_RESPONSE_BUFFER_SIZE * sizeof(char)); |
38 | if(responseBuffer == NULL) { |
||
39 | printf("HCI comm error: Cannot allocate buffer.\n");
|
||
40 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
|
||
41 | } |
||
42 | 57 | alexbesir | char *lineBuffer = malloc(HCI_COMM_LINE_BUFFER_SIZE * sizeof(char)); |
43 | if(lineBuffer == NULL) { |
||
44 | printf("HCI comm error: Cannot allocate buffer.\n");
|
||
45 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
|
||
46 | } |
||
47 | 10 | Janez1 | |
48 | // Socket holder
|
||
49 | int socketHolder = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
|
||
50 | if(socketHolder < 0) { |
||
51 | fprintf(stderr,"HCI comm error: Cannot create a new socket.\n");
|
||
52 | return HCI_COMM_ERR_NEW_SOCKET_FAIL;
|
||
53 | } |
||
54 | |||
55 | // Socket address holder
|
||
56 | struct sockaddr_in socketAddressHolder;
|
||
57 | memset(&socketAddressHolder, 0, sizeof(socketAddressHolder)); |
||
58 | socketAddressHolder.sin_family = AF_INET; |
||
59 | socketAddressHolder.sin_port = htons(portNum); |
||
60 | socketAddressHolder.sin_addr.s_addr = INADDR_ANY; |
||
61 | |||
62 | // Bind socket to port
|
||
63 | int bindingResult = bind(socketHolder,(struct sockaddr *)&socketAddressHolder, sizeof(socketAddressHolder)); |
||
64 | if(bindingResult == -1) { |
||
65 | fprintf(stderr,"HCI comm error: Cannot bind socket to port %d.\n",portNum);
|
||
66 | close(socketHolder); |
||
67 | return HCI_COMM_ERR_BIND_FAIL;
|
||
68 | } |
||
69 | |||
70 | // Listen to port
|
||
71 | int listenResult = listen(socketHolder, 10); |
||
72 | if(listenResult == -1) { |
||
73 | 53 | alexbesir | printf("HCI comm error: Cannot listen to port %d.\n",portNum);
|
74 | 10 | Janez1 | close(socketHolder); |
75 | return HCI_COMM_ERR_LISTEN_FAIL;
|
||
76 | } |
||
77 | |||
78 | // Infinite listening
|
||
79 | while(1) { |
||
80 | |||
81 | 57 | alexbesir | memset(responseBuffer,'\0',HCI_COMM_RESPONSE_BUFFER_SIZE);
|
82 | memset(requestBuffer,'\0',HCI_COMM_REQUEST_BUFFER_SIZE);
|
||
83 | memset(lineBuffer,'\0',HCI_COMM_LINE_BUFFER_SIZE);
|
||
84 | responseLength = 0;
|
||
85 | |||
86 | 53 | alexbesir | printf("[hci_comm_listener] Waiting for new connection...\n");
|
87 | |||
88 | 10 | Janez1 | // Accept request
|
89 | int connectionHolder = accept(socketHolder,NULL,NULL); |
||
90 | if(connectionHolder < 0) { |
||
91 | 53 | alexbesir | printf("HCI comm error: Error accepting request.\n");
|
92 | 54 | alexbesir | shutdown(connectionHolder,SHUT_RDWR); |
93 | close(connectionHolder); |
||
94 | continue;
|
||
95 | 10 | Janez1 | } |
96 | |||
97 | 53 | alexbesir | printf("[hci_comm_listener] New connection accepted\n");
|
98 | |||
99 | 10 | Janez1 | // Read request
|
100 | int readResult = read(connectionHolder,requestBuffer,HCI_COMM_REQUEST_BUFFER_SIZE);
|
||
101 | 53 | alexbesir | printf("[hci_comm_listener] Recieved request: %s \n",requestBuffer);
|
102 | 10 | Janez1 | if(readResult < 0) { |
103 | 53 | alexbesir | printf("HCI comm error: Error reading request.\n");
|
104 | 54 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Could not read request!</logic-response>");
|
105 | responseLength = strlen(responseBuffer); |
||
106 | write(connectionHolder,responseBuffer,responseLength); |
||
107 | shutdown(connectionHolder,SHUT_RDWR); |
||
108 | close(connectionHolder); |
||
109 | continue;
|
||
110 | 10 | Janez1 | } |
111 | |||
112 | 51 | alexbesir | // Parse request
|
113 | mxml_node_t *tree; |
||
114 | 53 | alexbesir | tree = mxmlLoadString(NULL, requestBuffer, MXML_NO_CALLBACK);
|
115 | if(tree == NULL) { |
||
116 | printf("[hci_comm_listener] Error parsing request!\n");
|
||
117 | 54 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Could not parse request!</logic-response>");
|
118 | responseLength = strlen(responseBuffer); |
||
119 | write(connectionHolder,responseBuffer,responseLength); |
||
120 | shutdown(connectionHolder,SHUT_RDWR); |
||
121 | close(connectionHolder); |
||
122 | continue;
|
||
123 | 53 | alexbesir | } |
124 | printf("[hci_comm_listener] Request parsed\n");
|
||
125 | 51 | alexbesir | |
126 | 10 | Janez1 | // Create a response
|
127 | 53 | alexbesir | printf("[hci_comm_listener] Creating response\n");
|
128 | 51 | alexbesir | mxml_node_t *node; |
129 | 53 | alexbesir | node = mxmlFindElement(tree, tree, "hci-request", NULL, NULL, MXML_DESCEND); |
130 | if(node == NULL) { |
||
131 | 54 | alexbesir | printf("[hci_comm_listener] Request invalid! Sending error to client\n");
|
132 | strcpy(responseBuffer,"<logic-response type=\"error\">Invalid request!</logic-response>");
|
||
133 | responseLength = strlen(responseBuffer); |
||
134 | write(connectionHolder,responseBuffer,responseLength); |
||
135 | shutdown(connectionHolder,SHUT_RDWR); |
||
136 | close(connectionHolder); |
||
137 | continue;
|
||
138 | 53 | alexbesir | } |
139 | printf("[hci_comm_listener] Main request node found\n");
|
||
140 | printf("[hci_comm_listener] %d\n",node);
|
||
141 | |||
142 | attrVal = (char *)malloc(sizeof(node->value.element.attrs->value)*strlen(mxmlElementGetAttr(node, "type"))); |
||
143 | attrVal = mxmlElementGetAttr(node,"type");
|
||
144 | printf("[hci_comm_listener] Got type\n");
|
||
145 | 51 | alexbesir | if(strcmp(attrVal,"checkConnection") == 0) { |
146 | 53 | alexbesir | printf("[hci_comm_listener] checkConnection request\n");
|
147 | strcpy(responseBuffer,"");
|
||
148 | strcat(responseBuffer,"<logic-response type=\"checkConnection\"><data>");
|
||
149 | mxml_node_t *child = node->child; |
||
150 | child = child->child; |
||
151 | strcat(responseBuffer,child->value.text.string); |
||
152 | strcat(responseBuffer,"</data></logic-response>");
|
||
153 | printf("[hci_comm_listener] Response formed: %s\n",responseBuffer);
|
||
154 | responseLength = strlen(responseBuffer); |
||
155 | printf("[hci_comm_listener] Response length formed: %d\n",responseLength);
|
||
156 | 51 | alexbesir | } else if(strcmp(attrVal,"getConfig") == 0) { |
157 | 57 | alexbesir | printf("[hci_comm_listener] getConfig request\n");
|
158 | 51 | alexbesir | // TODO
|
159 | } else if(strcmp(attrVal,"setConfig") == 0) { |
||
160 | 57 | alexbesir | printf("[hci_comm_listener] setConfig request\n");
|
161 | 51 | alexbesir | // TODO
|
162 | } else if(strcmp(attrVal,"getScenarios") == 0) { |
||
163 | 57 | alexbesir | printf("[hci_comm_listener] getScenarios request\n");
|
164 | FILE *fp; |
||
165 | if(fp = fopen("./scenariotree.xml", "r")) { |
||
166 | printf("[hci_comm_listener] File opened\n");
|
||
167 | strcat(responseBuffer,"<logic-response type=\"getScenarios\">");
|
||
168 | while(fgets(lineBuffer,HCI_COMM_LINE_BUFFER_SIZE,fp)) {
|
||
169 | strcat(responseBuffer,lineBuffer); |
||
170 | } |
||
171 | strcat(responseBuffer,"</logic-response>");
|
||
172 | responseLength = strlen(responseBuffer); |
||
173 | fclose(fp); |
||
174 | } else {
|
||
175 | printf("[hci_comm_listener] Error: Can't open file scenariotree.xml\n");
|
||
176 | strcpy(responseBuffer,"<logic-response type=\"error\">Could not read file!</logic-response>");
|
||
177 | responseLength = strlen(responseBuffer); |
||
178 | } |
||
179 | 51 | alexbesir | } else if(strcmp(attrVal,"setScenarios") == 0) { |
180 | 57 | alexbesir | printf("[hci_comm_listener] setScenarios request\n");
|
181 | // Prepare new content for scenariotree.xml
|
||
182 | strncpy(lineBuffer,requestBuffer+54,strlen(requestBuffer)-(54+14+2)); |
||
183 | strcpy(requestBuffer,"<?xml version=\"1.0\"?>");
|
||
184 | strcat(requestBuffer,lineBuffer); |
||
185 | FILE *fp; |
||
186 | if(fp = fopen("./scenariotree.xml", "w")) { |
||
187 | fputs(requestBuffer,fp); |
||
188 | fclose(fp); |
||
189 | pthread_mutex_lock(&mtx); |
||
190 | hciChanged = HCI_CHANGED_SCENARIOS; |
||
191 | pthread_mutex_unlock(&mtx); |
||
192 | strcpy(responseBuffer,"<logic-response type=\"setScenarios\"></logic-response>");
|
||
193 | responseLength = strlen(responseBuffer); |
||
194 | } else {
|
||
195 | printf("[hci_comm_listener] Error: Can't open file scenariotree.xml for writing\n");
|
||
196 | strcpy(responseBuffer,"<logic-response type=\"error\">Could not write file!</logic-response>");
|
||
197 | responseLength = strlen(responseBuffer); |
||
198 | } |
||
199 | 51 | alexbesir | } else if(strcmp(attrVal,"executeAction") == 0) { |
200 | 57 | alexbesir | printf("[hci_comm_listener] executeAction request\n");
|
201 | 51 | alexbesir | // TODO
|
202 | } else {
|
||
203 | 53 | alexbesir | strcpy(responseBuffer,"<logic-response type=\"error\">Invalid request!</logic-response>");
|
204 | 51 | alexbesir | responseLength = 62;
|
205 | } |
||
206 | 10 | Janez1 | |
207 | // Check if logic wants to terminate the infinite loop
|
||
208 | if(responseLength == HCI_COMM_TERMINATE) {
|
||
209 | break;
|
||
210 | } |
||
211 | |||
212 | // Send response
|
||
213 | 53 | alexbesir | int writeResult = write(connectionHolder,responseBuffer,responseLength);
|
214 | printf("[hci_comm_listener] Written response to client\n");
|
||
215 | 10 | Janez1 | if(writeResult < 0) { |
216 | 53 | alexbesir | printf("HCI comm error: Error writting response.\n");
|
217 | 10 | Janez1 | } |
218 | |||
219 | 53 | alexbesir | // Close connection
|
220 | free(attrVal); |
||
221 | shutdown(connectionHolder,SHUT_RDWR); |
||
222 | close(connectionHolder); |
||
223 | |||
224 | printf("[hci_comm_listener] Connection closed\n");
|
||
225 | |||
226 | 10 | Janez1 | } |
227 | |||
228 | // Terminate
|
||
229 | close(socketHolder); |
||
230 | free(requestBuffer); |
||
231 | requestBuffer = NULL;
|
||
232 | return HCI_COMM_TERMINATED_BY_LOGIC;
|
||
233 | |||
234 | } |