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23e7e3ae JVH |
1 | /** |
2 | * Copyright (C) 2011-2012 Juho Vähä-Herttua | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * This library is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | */ | |
14 | ||
2340bcd3 JVH |
15 | #include <stdlib.h> |
16 | #include <string.h> | |
17 | #include <stdio.h> | |
18 | #include <assert.h> | |
19 | ||
20 | #include "httpd.h" | |
21 | #include "netutils.h" | |
22 | #include "http_request.h" | |
23 | #include "compat.h" | |
24 | #include "logger.h" | |
25 | ||
26 | struct http_connection_s { | |
27 | int connected; | |
28 | ||
29 | int socket_fd; | |
30 | void *user_data; | |
31 | http_request_t *request; | |
32 | }; | |
33 | typedef struct http_connection_s http_connection_t; | |
34 | ||
35 | struct httpd_s { | |
36 | logger_t *logger; | |
37 | httpd_callbacks_t callbacks; | |
38 | ||
39 | int use_rtsp; | |
40 | ||
41 | int max_connections; | |
42 | http_connection_t *connections; | |
43 | ||
44 | /* These variables only edited mutex locked */ | |
45 | int running; | |
46 | int joined; | |
47 | thread_handle_t thread; | |
48 | mutex_handle_t run_mutex; | |
49 | ||
50 | /* Server fd for accepting connections */ | |
51 | int server_fd; | |
52 | }; | |
53 | ||
54 | httpd_t * | |
55 | httpd_init(logger_t *logger, httpd_callbacks_t *callbacks, int max_connections, int use_rtsp) | |
56 | { | |
57 | httpd_t *httpd; | |
58 | ||
59 | assert(logger); | |
60 | assert(callbacks); | |
61 | assert(max_connections > 0); | |
62 | ||
63 | /* Allocate the httpd_t structure */ | |
64 | httpd = calloc(1, sizeof(httpd_t)); | |
65 | if (!httpd) { | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | httpd->use_rtsp = !!use_rtsp; | |
70 | httpd->max_connections = max_connections; | |
71 | httpd->connections = calloc(max_connections, sizeof(http_connection_t)); | |
72 | if (!httpd->connections) { | |
73 | free(httpd); | |
74 | return NULL; | |
75 | } | |
76 | ||
77 | /* Use the logger provided */ | |
78 | httpd->logger = logger; | |
79 | ||
80 | /* Save callback pointers */ | |
81 | memcpy(&httpd->callbacks, callbacks, sizeof(httpd_callbacks_t)); | |
82 | ||
83 | /* Initial status joined */ | |
84 | httpd->running = 0; | |
85 | httpd->joined = 1; | |
86 | ||
87 | return httpd; | |
88 | } | |
89 | ||
90 | void | |
91 | httpd_destroy(httpd_t *httpd) | |
92 | { | |
93 | if (httpd) { | |
94 | httpd_stop(httpd); | |
95 | ||
96 | free(httpd->connections); | |
97 | free(httpd); | |
98 | } | |
99 | } | |
100 | ||
101 | static void | |
102 | httpd_add_connection(httpd_t *httpd, int fd, unsigned char *local, int local_len, unsigned char *remote, int remote_len) | |
103 | { | |
104 | int i; | |
105 | ||
106 | for (i=0; i<httpd->max_connections; i++) { | |
107 | if (!httpd->connections[i].connected) { | |
108 | break; | |
109 | } | |
110 | } | |
111 | if (i == httpd->max_connections) { | |
112 | logger_log(httpd->logger, LOGGER_INFO, "Max connections reached\n"); | |
113 | shutdown(fd, SHUT_RDWR); | |
114 | closesocket(fd); | |
115 | return; | |
116 | } | |
117 | ||
118 | httpd->connections[i].socket_fd = fd; | |
119 | httpd->connections[i].connected = 1; | |
120 | httpd->connections[i].user_data = httpd->callbacks.conn_init(httpd->callbacks.opaque, local, local_len, remote, remote_len); | |
121 | } | |
122 | ||
123 | static void | |
124 | httpd_remove_connection(httpd_t *httpd, http_connection_t *connection) | |
125 | { | |
126 | if (connection->request) { | |
127 | http_request_destroy(connection->request); | |
128 | connection->request = NULL; | |
129 | } | |
130 | httpd->callbacks.conn_destroy(connection->user_data); | |
131 | shutdown(connection->socket_fd, SHUT_WR); | |
132 | closesocket(connection->socket_fd); | |
133 | connection->connected = 0; | |
134 | } | |
135 | ||
136 | static THREAD_RETVAL | |
137 | httpd_thread(void *arg) | |
138 | { | |
139 | httpd_t *httpd = arg; | |
140 | char buffer[1024]; | |
141 | int i; | |
142 | ||
143 | assert(httpd); | |
144 | ||
145 | while (1) { | |
146 | fd_set rfds; | |
147 | struct timeval tv; | |
148 | int nfds=0; | |
149 | int ret; | |
150 | ||
151 | MUTEX_LOCK(httpd->run_mutex); | |
152 | if (!httpd->running) { | |
153 | MUTEX_UNLOCK(httpd->run_mutex); | |
154 | break; | |
155 | } | |
156 | MUTEX_UNLOCK(httpd->run_mutex); | |
157 | ||
158 | /* Set timeout value to 5ms */ | |
159 | tv.tv_sec = 1; | |
160 | tv.tv_usec = 5000; | |
161 | ||
162 | /* Get the correct nfds value and set rfds */ | |
163 | FD_ZERO(&rfds); | |
164 | FD_SET(httpd->server_fd, &rfds); | |
165 | nfds = httpd->server_fd+1; | |
166 | for (i=0; i<httpd->max_connections; i++) { | |
167 | int socket_fd; | |
168 | if (!httpd->connections[i].connected) { | |
169 | continue; | |
170 | } | |
171 | socket_fd = httpd->connections[i].socket_fd; | |
172 | FD_SET(socket_fd, &rfds); | |
173 | if (nfds <= socket_fd) { | |
174 | nfds = socket_fd+1; | |
175 | } | |
176 | } | |
177 | ||
178 | ret = select(nfds, &rfds, NULL, NULL, &tv); | |
179 | if (ret == 0) { | |
180 | /* Timeout happened */ | |
181 | continue; | |
182 | } else if (ret == -1) { | |
183 | /* FIXME: Error happened */ | |
184 | logger_log(httpd->logger, LOGGER_INFO, "Error in select\n"); | |
185 | break; | |
186 | } | |
187 | ||
188 | if (FD_ISSET(httpd->server_fd, &rfds)) { | |
189 | struct sockaddr_storage remote_saddr; | |
190 | socklen_t remote_saddrlen; | |
191 | struct sockaddr_storage local_saddr; | |
192 | socklen_t local_saddrlen; | |
193 | unsigned char *local, *remote; | |
194 | int local_len, remote_len; | |
195 | int fd; | |
196 | ||
197 | remote_saddrlen = sizeof(remote_saddr); | |
198 | fd = accept(httpd->server_fd, (struct sockaddr *)&remote_saddr, &remote_saddrlen); | |
199 | if (fd == -1) { | |
200 | /* FIXME: Error happened */ | |
201 | break; | |
202 | } | |
203 | ||
204 | local_saddrlen = sizeof(local_saddr); | |
205 | ret = getsockname(fd, (struct sockaddr *)&local_saddr, &local_saddrlen); | |
206 | if (ret == -1) { | |
207 | closesocket(fd); | |
208 | continue; | |
209 | } | |
210 | ||
211 | logger_log(httpd->logger, LOGGER_INFO, "Accepted client on socket %d\n", fd); | |
212 | local = netutils_get_address(&local_saddr, &local_len); | |
213 | remote = netutils_get_address(&remote_saddr, &remote_len); | |
214 | ||
215 | httpd_add_connection(httpd, fd, local, local_len, remote, remote_len); | |
216 | } | |
217 | for (i=0; i<httpd->max_connections; i++) { | |
218 | http_connection_t *connection = &httpd->connections[i]; | |
219 | ||
220 | if (!connection->connected) { | |
221 | continue; | |
222 | } | |
223 | if (!FD_ISSET(connection->socket_fd, &rfds)) { | |
224 | continue; | |
225 | } | |
226 | ||
227 | /* If not in the middle of request, allocate one */ | |
228 | if (!connection->request) { | |
229 | connection->request = http_request_init(httpd->use_rtsp); | |
230 | assert(connection->request); | |
231 | } | |
232 | ||
14003408 | 233 | logger_log(httpd->logger, LOGGER_DEBUG, "Receiving on socket %d\n", httpd->connections[i].socket_fd); |
2340bcd3 JVH |
234 | ret = recv(connection->socket_fd, buffer, sizeof(buffer), 0); |
235 | if (ret == 0) { | |
236 | logger_log(httpd->logger, LOGGER_INFO, "Connection closed\n"); | |
237 | httpd_remove_connection(httpd, connection); | |
238 | continue; | |
239 | } | |
240 | ||
241 | /* Parse HTTP request from data read from connection */ | |
242 | http_request_add_data(connection->request, buffer, ret); | |
243 | if (http_request_has_error(connection->request)) { | |
244 | logger_log(httpd->logger, LOGGER_INFO, "Error in parsing: %s\n", http_request_get_error_name(connection->request)); | |
245 | httpd_remove_connection(httpd, connection); | |
246 | continue; | |
247 | } | |
248 | ||
249 | /* If request is finished, process and deallocate */ | |
250 | if (http_request_is_complete(connection->request)) { | |
251 | http_response_t *response = NULL; | |
252 | ||
253 | httpd->callbacks.conn_request(connection->user_data, connection->request, &response); | |
254 | http_request_destroy(connection->request); | |
255 | connection->request = NULL; | |
256 | ||
257 | if (response) { | |
258 | const char *data; | |
259 | int datalen; | |
260 | int written; | |
261 | int ret; | |
262 | ||
263 | /* Get response data and datalen */ | |
264 | data = http_response_get_data(response, &datalen); | |
265 | ||
266 | written = 0; | |
267 | while (written < datalen) { | |
268 | ret = send(connection->socket_fd, data+written, datalen-written, 0); | |
269 | if (ret == -1) { | |
270 | /* FIXME: Error happened */ | |
271 | logger_log(httpd->logger, LOGGER_INFO, "Error in sending data\n"); | |
272 | break; | |
273 | } | |
274 | written += ret; | |
275 | } | |
276 | } else { | |
277 | logger_log(httpd->logger, LOGGER_INFO, "Didn't get response\n"); | |
278 | } | |
279 | http_response_destroy(response); | |
280 | } | |
281 | } | |
282 | } | |
283 | ||
284 | /* Remove all connections that are still connected */ | |
285 | for (i=0; i<httpd->max_connections; i++) { | |
286 | http_connection_t *connection = &httpd->connections[i]; | |
287 | ||
288 | if (!connection->connected) { | |
289 | continue; | |
290 | } | |
291 | logger_log(httpd->logger, LOGGER_INFO, "Removing connection\n"); | |
292 | httpd_remove_connection(httpd, connection); | |
293 | } | |
294 | ||
295 | logger_log(httpd->logger, LOGGER_INFO, "Exiting thread\n"); | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | int | |
301 | httpd_start(httpd_t *httpd, unsigned short *port) | |
302 | { | |
303 | assert(httpd); | |
304 | assert(port); | |
305 | ||
306 | MUTEX_LOCK(httpd->run_mutex); | |
307 | if (httpd->running || !httpd->joined) { | |
308 | MUTEX_UNLOCK(httpd->run_mutex); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | httpd->server_fd = netutils_init_socket(port, 1, 0); | |
313 | if (httpd->server_fd == -1) { | |
314 | logger_log(httpd->logger, LOGGER_INFO, "Error initialising socket %d\n", SOCKET_GET_ERROR()); | |
315 | MUTEX_UNLOCK(httpd->run_mutex); | |
316 | return -1; | |
317 | } | |
318 | if (listen(httpd->server_fd, 5) == -1) { | |
319 | logger_log(httpd->logger, LOGGER_INFO, "Error listening to socket\n"); | |
320 | MUTEX_UNLOCK(httpd->run_mutex); | |
321 | return -2; | |
322 | } | |
323 | logger_log(httpd->logger, LOGGER_INFO, "Initialized server socket\n"); | |
324 | ||
325 | /* Set values correctly and create new thread */ | |
326 | httpd->running = 1; | |
327 | httpd->joined = 0; | |
328 | THREAD_CREATE(httpd->thread, httpd_thread, httpd); | |
329 | MUTEX_UNLOCK(httpd->run_mutex); | |
330 | ||
331 | return 1; | |
332 | } | |
333 | ||
334 | void | |
335 | httpd_stop(httpd_t *httpd) | |
336 | { | |
337 | assert(httpd); | |
338 | ||
339 | MUTEX_LOCK(httpd->run_mutex); | |
340 | if (!httpd->running || httpd->joined) { | |
341 | MUTEX_UNLOCK(httpd->run_mutex); | |
342 | return; | |
343 | } | |
344 | httpd->running = 0; | |
345 | MUTEX_UNLOCK(httpd->run_mutex); | |
346 | ||
347 | THREAD_JOIN(httpd->thread); | |
348 | ||
349 | MUTEX_LOCK(httpd->run_mutex); | |
350 | httpd->joined = 1; | |
351 | MUTEX_UNLOCK(httpd->run_mutex); | |
352 | } | |
353 |