connection.c 13.6 KB
Newer Older
Jack Moffitt's avatar
Jack Moffitt committed
1 2 3
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
4
#include <time.h>
Jack Moffitt's avatar
Jack Moffitt committed
5
#include <sys/types.h>
6 7 8

#ifndef _WIN32
#include <sys/time.h>
Jack Moffitt's avatar
Jack Moffitt committed
9 10
#include <sys/socket.h>
#include <netinet/in.h>
11
#else
12
#include <winsock2.h>
13 14
#define snprintf _snprintf
#define strcasecmp stricmp
15
#define strncasecmp strnicmp
16
#endif
Jack Moffitt's avatar
Jack Moffitt committed
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220

#include "os.h"

#include "thread.h"
#include "avl.h"
#include "sock.h"
#include "log.h"
#include "httpp.h"

#include "config.h"
#include "global.h"
#include "util.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
#include "format.h"
#include "logging.h"

#include "source.h"

#define CATMODULE "connection"

typedef struct con_queue_tag {
	connection_t *con;
	struct con_queue_tag *next;
} con_queue_t;

typedef struct _thread_queue_tag {
	long thread_id;
	struct _thread_queue_tag *next;
} thread_queue_t;

static mutex_t _connection_mutex;
static unsigned long _current_id = 0;
static int _initialized = 0;
static cond_t _pool_cond;

static con_queue_t *_queue = NULL;
static mutex_t _queue_mutex;

static thread_queue_t *_conhands = NULL;

static rwlock_t _source_shutdown_rwlock;

static void *_handle_connection(void *arg);

void connection_initialize(void)
{
	if (_initialized) return;
	
	thread_mutex_create(&_connection_mutex);
	thread_mutex_create(&_queue_mutex);
	thread_rwlock_create(&_source_shutdown_rwlock);
	thread_cond_create(&_pool_cond);

	_initialized = 1;
}

void connection_shutdown(void)
{
	if (!_initialized) return;
	
	thread_cond_destroy(&_pool_cond);
	thread_rwlock_destroy(&_source_shutdown_rwlock);
	thread_mutex_destroy(&_queue_mutex);
	thread_mutex_destroy(&_connection_mutex);

	_initialized = 0;
}

static connection_t *_create_connection(void)
{
	connection_t *con;

	con = (connection_t *)malloc(sizeof(connection_t));
	memset(con, 0, sizeof(connection_t));

	return con;
}

static unsigned long _next_connection_id(void)
{
	unsigned long id;

	thread_mutex_lock(&_connection_mutex);
	id = _current_id++;
	thread_mutex_unlock(&_connection_mutex);

	return id;
}

static connection_t *_accept_connection(void)
{
	int sock;
	fd_set rfds;
	connection_t *con;
	struct timeval tv;
	char *ip;

	FD_ZERO(&rfds);
	FD_SET(global.serversock, &rfds);

	tv.tv_sec = 0;
	tv.tv_usec = 30000;

	if (select(global.serversock + 1, &rfds, NULL, NULL, &tv) <= 0) {
		return NULL;
	}

	/* malloc enough room for 123.123.123.123\0 */
	ip = (char *)malloc(16);

	sock = sock_accept(global.serversock, ip, 16);
	if (sock >= 0) {
		con = _create_connection();

		con->sock = sock;
		con->con_time = time(NULL);
		con->id = _next_connection_id();
		con->ip = ip;

		return con;
	}

	if (!sock_recoverable(sock_error()))
		WARN2("accept() failed with error %d: %s", sock_error(), strerror(sock_error()));
	
	free(ip);

	return NULL;
}

static void _add_connection(connection_t *con)
{
	con_queue_t *node;

	node = (con_queue_t *)malloc(sizeof(con_queue_t));
	
	thread_mutex_lock(&_queue_mutex);
	node->con = con;
	node->next = _queue;
	_queue = node;
	thread_mutex_unlock(&_queue_mutex);

	printf("connection added....\n");
}

static void _signal_pool(void)
{
	thread_cond_signal(&_pool_cond);
}

static void _push_thread(thread_queue_t **queue, long thread_id)
{
	/* create item */
	thread_queue_t *item = (thread_queue_t *)malloc(sizeof(thread_queue_t));
	item->thread_id = thread_id;
	item->next = NULL;


	thread_mutex_lock(&_queue_mutex);
	if (*queue == NULL) {
		*queue = item;
	} else {
		item->next = *queue;
		*queue = item;
	}
	thread_mutex_unlock(&_queue_mutex);
}

static long _pop_thread(thread_queue_t **queue)
{
	long id;
	thread_queue_t *item;

	thread_mutex_lock(&_queue_mutex);

	item = *queue;
	if (item == NULL) {
		thread_mutex_unlock(&_queue_mutex);
		return -1;
	}

	*queue = item->next;
	item->next = NULL;
	id = item->thread_id;
	free(item);

	thread_mutex_unlock(&_queue_mutex);

	return id;
}

static void _build_pool(void)
{
	ice_config_t *config;
	int i, tid;
	char buff[64];

	config = config_get_config();

	for (i = 0; i < config->threadpool_size; i++) {
		snprintf(buff, 64, "Connection Thread #%d", i);
221
		tid = thread_create(buff, _handle_connection, NULL, THREAD_ATTACHED);
Jack Moffitt's avatar
Jack Moffitt committed
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312
		_push_thread(&_conhands, tid);
	}
}

static void _destroy_pool(void)
{
	long id;
	int i;

	i = 0;

	thread_cond_broadcast(&_pool_cond);
	id = _pop_thread(&_conhands);
	while (id != -1) {
		thread_join(id);
		_signal_pool();
		id = _pop_thread(&_conhands);
	}
}

void connection_accept_loop(void)
{
	connection_t *con;

	_build_pool();

	while (global.running == ICE_RUNNING) {
		con = _accept_connection();

		if (con) {
			_add_connection(con);
			_signal_pool();
		}
	}

	_destroy_pool();

	/* wait for all the sources to shutdown */
	thread_rwlock_wlock(&_source_shutdown_rwlock);
	thread_rwlock_unlock(&_source_shutdown_rwlock);
}

static connection_t *_get_connection(void)
{
	con_queue_t *node = NULL;
	con_queue_t *oldnode = NULL;
	connection_t *con = NULL;

	thread_mutex_lock(&_queue_mutex);
	if (_queue) {
		node = _queue;
		while (node->next) {
			oldnode = node;
			node = node->next;
		}
		
		/* node is now the last node
		** and oldnode is the previous one, or NULL
		*/
		if (oldnode) oldnode->next = NULL;
		else (_queue) = NULL;
	}
	thread_mutex_unlock(&_queue_mutex);

	if (node) {
		con = node->con;
		free(node);
	}

	return con;
}

static void *_handle_connection(void *arg)
{
	char header[4096];
	connection_t *con;
	http_parser_t *parser;
	source_t *source;
	stats_connection_t *stats;
	avl_node *node;
	http_var_t *var;
	client_t *client;
	int bytes;

	while (global.running == ICE_RUNNING) {
		memset(header, 0, 4096);

		thread_cond_wait(&_pool_cond);
		if (global.running != ICE_RUNNING) break;

		/* grab a connection and set the socket to blocking */
313 314
		while (con = _get_connection()) {
			stats_event_inc(NULL, "connections");
Jack Moffitt's avatar
Jack Moffitt committed
315

316
			sock_set_blocking(con->sock, SOCK_BLOCK);
Jack Moffitt's avatar
Jack Moffitt committed
317

318 319 320
			/* fill header with the http header */
			if (util_read_header(con->sock, header, 4096) == 0) {
				/* either we didn't get a complete header, or we timed out */
Jack Moffitt's avatar
Jack Moffitt committed
321 322 323 324
				connection_close(con);
				continue;
			}

325 326 327 328
			parser = httpp_create_parser();
			httpp_initialize(parser, NULL);
			if (httpp_parse(parser, header, strlen(header))) {
				/* handle the connection or something */
Jack Moffitt's avatar
Jack Moffitt committed
329
				
330 331
				if (strcmp("ICE", httpp_getvar(parser, HTTPP_VAR_PROTOCOL)) != 0 && strcmp("HTTP", httpp_getvar(parser, HTTPP_VAR_PROTOCOL)) != 0) {
					printf("DEBUG: bad protocol\n");
Jack Moffitt's avatar
Jack Moffitt committed
332 333 334 335 336
					connection_close(con);
					httpp_destroy(parser);
					continue;
				}

337 338
				if (parser->req_type == httpp_req_source) {
					char *contenttype;
339

340 341
					printf("DEBUG: source logging in\n");
					stats_event_inc(NULL, "source_connections");
Jack Moffitt's avatar
Jack Moffitt committed
342
				
343 344 345 346 347 348 349
					if (strcmp((httpp_getvar(parser, "ice-password") != NULL) ? httpp_getvar(parser, "ice-password") : "", (config_get_config()->source_password != NULL) ? config_get_config()->source_password : "") != 0) {
						printf("DEBUG: bad password\n");
						INFO1("Source (%s) attempted to login with bad password", httpp_getvar(parser, HTTPP_VAR_URI));
						connection_close(con);
						httpp_destroy(parser);
						continue;
					}
Jack Moffitt's avatar
Jack Moffitt committed
350

351 352 353 354 355 356 357 358 359 360 361 362 363 364
					/* check to make sure this source has
					** a unique mountpoint
					*/

					avl_tree_rlock(global.source_tree);
					if (source_find_mount(httpp_getvar(parser, HTTPP_VAR_URI)) != NULL) {
						printf("Source attempted to connect with an already used mountpoint.\n");
						INFO1("Source tried to log in as %s, but is already used", httpp_getvar(parser, HTTPP_VAR_URI));
						connection_close(con);
						httpp_destroy(parser);
						avl_tree_unlock(global.source_tree);
						continue;
					}
					avl_tree_unlock(global.source_tree);
Jack Moffitt's avatar
Jack Moffitt committed
365

366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388
					/* check to make sure this source wouldn't
					** be over the limit
					*/
					global_lock();
					if (global.sources >= config_get_config()->source_limit) {
						printf("TOO MANY SOURCE, KICKING THIS ONE\n");
						INFO1("Source (%s) logged in, but there are too many sources", httpp_getvar(parser, HTTPP_VAR_URI));
						connection_close(con);
						httpp_destroy(parser);
						global_unlock();
						continue;
					}
					global.sources++;
					global_unlock();
					
					stats_event_inc(NULL, "sources");

					contenttype = httpp_getvar(parser, "content-type");

					if (contenttype != NULL) {
						format_type_t format = format_get_type(contenttype);
						if (format < 0) {
							WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
389 390
						    connection_close(con);
    						httpp_destroy(parser);
391 392 393 394 395 396
							continue;
						} else {
							source = source_create(con, parser, httpp_getvar(parser, HTTPP_VAR_URI), format);
						}
					} else {
						WARN0("No content-type header, cannot handle source");
397 398
						connection_close(con);
    					httpp_destroy(parser);
399 400
						continue;
					}
Jack Moffitt's avatar
Jack Moffitt committed
401

402
					source->shutdown_rwlock = &_source_shutdown_rwlock;
Jack Moffitt's avatar
Jack Moffitt committed
403

404 405 406
					sock_set_blocking(con->sock, SOCK_NONBLOCK);
				
					thread_create("Source Thread", source_main, (void *)source, THREAD_DETACHED);
Jack Moffitt's avatar
Jack Moffitt committed
407
					continue;
408 409 410 411 412 413 414 415 416
				} else if (parser->req_type == httpp_req_stats) {
					printf("DEBUG: stats connection...\n");
					stats_event_inc(NULL, "stats_connections");
					
					if (strcmp((httpp_getvar(parser, "ice-password") != NULL) ? httpp_getvar(parser, "ice-password") : "", (config_get_config()->source_password != NULL) ? config_get_config()->source_password : "") != 0) {
						printf("DEBUG: bad password\n");
						connection_close(con);
						httpp_destroy(parser);
						continue;
Jack Moffitt's avatar
Jack Moffitt committed
417
					}
418 419 420 421 422 423 424 425 426 427
					
					stats_event_inc(NULL, "stats");
					
					/* create stats connection and create stats handler thread */
					stats = (stats_connection_t *)malloc(sizeof(stats_connection_t));
					stats->parser = parser;
					stats->con = con;
					
					thread_create("Stats Connection", stats_connection, (void *)stats, THREAD_DETACHED);
					
Jack Moffitt's avatar
Jack Moffitt committed
428
					continue;
429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449
				} else if (parser->req_type == httpp_req_play || parser->req_type == httpp_req_get) {
					printf("DEBUG: client coming in...\n");

					/* make a client */
					client = client_create(con, parser);
					stats_event_inc(NULL, "client_connections");
					
					/* there are several types of HTTP GET clients
					** media clients, which are looking for a source (eg, URI = /stream.ogg)
					** stats clients, which are looking for /stats.xml
					** and director server authorizers, which are looking for /GUID-xxxxxxxx (where xxxxxx is the GUID in question
					** we need to handle the latter two before the former, as the latter two
					** aren't subject to the limits.
					*/
					// TODO: add GUID-xxxxxx
					if (strcmp(httpp_getvar(parser, HTTPP_VAR_URI), "/stats.xml") == 0) {
						printf("sending stats.xml\n");
						stats_sendxml(client);
						continue;
					}
					
Jack Moffitt's avatar
Jack Moffitt committed
450 451 452 453 454 455 456 457 458 459 460 461 462
					global_lock();
					if (global.clients >= config_get_config()->client_limit) {
						if (parser->req_type == httpp_req_get) {
							client->respcode = 504;
							bytes = sock_write(client->con->sock, "HTTP/1.0 504 Server Full\r\nContent-Type: text/html\r\n\r\n"\
									   "<b>The server is already full.  Try again later.</b>\r\n");
							if (bytes > 0) client->con->sent_bytes = bytes;
						}
						client_destroy(client);
						global_unlock();
						continue;
					}
					global_unlock();
463 464 465 466 467 468 469 470 471 472 473 474 475
					
					avl_tree_rlock(global.source_tree);
					source = source_find_mount(httpp_getvar(parser, HTTPP_VAR_URI));
					if (source) {
						printf("DEBUG: source found for client\n");
						
						global_lock();
						if (global.clients >= config_get_config()->client_limit) {
							if (parser->req_type == httpp_req_get) {
								client->respcode = 504;
								bytes = sock_write(client->con->sock, "HTTP/1.0 504 Server Full\r\nContent-Type: text/html\r\n\r\n"\
										   "<b>The server is already full.  Try again later.</b>\r\n");
								if (bytes > 0) client->con->sent_bytes = bytes;
Jack Moffitt's avatar
Jack Moffitt committed
476
							}
477 478 479
							client_destroy(client);
							global_unlock();
							continue;
Jack Moffitt's avatar
Jack Moffitt committed
480
						}
481 482
						global.clients++;
						global_unlock();
Jack Moffitt's avatar
Jack Moffitt committed
483
						
484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507
						if (parser->req_type == httpp_req_get) {
							client->respcode = 200;
							sock_write(client->con->sock, "HTTP/1.0 200 OK\r\nContent-Type: application/x-ogg\r\n");
							/* iterate through source http headers and send to client */
							avl_tree_rlock(source->parser->vars);
							node = avl_get_first(source->parser->vars);
							while (node) {
								var = (http_var_t *)node->key;
								if (strcasecmp(var->name, "ice-password") && !strncasecmp("ice-", var->name, 4)) {
									printf("DEBUG: sending %s: %s\n", var->name, var->value);
									sock_write(client->con->sock, "%s: %s\r\n", var->name, var->value);
								}
								node = avl_get_next(node);
							}
							avl_tree_unlock(source->parser->vars);
							
							sock_write(client->con->sock, "\r\n");
							
							sock_set_blocking(client->con->sock, SOCK_NONBLOCK);
						}
						
						avl_tree_wlock(source->pending_tree);
						avl_insert(source->pending_tree, (void *)client);
						avl_tree_unlock(source->pending_tree);
Jack Moffitt's avatar
Jack Moffitt committed
508
					}
509 510 511 512 513 514 515 516 517 518 519 520
					
					avl_tree_unlock(global.source_tree);
					
					if (!source) {
						printf("DEBUG: source not found for client\n");
						if (parser->req_type == httpp_req_get) {
							client->respcode = 404;
							bytes = sock_write(client->con->sock, "HTTP/1.0 404 Source Not Found\r\nContent-Type: text/html\r\n\r\n"\
									   "<b>The source you requested could not be found.</b>\r\n");
							if (bytes > 0) client->con->sent_bytes = bytes;
						}
						client_destroy(client);
Jack Moffitt's avatar
Jack Moffitt committed
521
					}
522 523 524 525 526 527 528
					
					continue;
				} else {
					printf("DEBUG: wrong request type\n");
					connection_close(con);
					httpp_destroy(parser);
					continue;
Jack Moffitt's avatar
Jack Moffitt committed
529 530
				}
			} else {
531
				printf("DEBUG: parsing failed\n");
Jack Moffitt's avatar
Jack Moffitt committed
532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
				connection_close(con);
				httpp_destroy(parser);
				continue;
			}
		}
	}

	thread_exit(0);

	return NULL;
}

void connection_close(connection_t *con)
{
	sock_close(con->sock);
	if (con->ip) free(con->ip);
	if (con->host) free(con->host);
	free(con);
}