connection.c 26.2 KB
Newer Older
1
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
2 3 4 5
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

Jack Moffitt's avatar
Jack Moffitt committed
6 7 8
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
9
#include <time.h>
Jack Moffitt's avatar
Jack Moffitt committed
10
#include <sys/types.h>
11
#include <sys/stat.h>
12 13 14
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
15 16 17

#ifndef _WIN32
#include <sys/time.h>
Jack Moffitt's avatar
Jack Moffitt committed
18 19
#include <sys/socket.h>
#include <netinet/in.h>
20
#else
21
#include <winsock2.h>
22 23
#define snprintf _snprintf
#define strcasecmp stricmp
24
#define strncasecmp strnicmp
25
#endif
Jack Moffitt's avatar
Jack Moffitt committed
26 27 28

#include "os.h"

Karl Heyes's avatar
Karl Heyes committed
29 30 31 32
#include "thread/thread.h"
#include "avl/avl.h"
#include "net/sock.h"
#include "httpp/httpp.h"
Jack Moffitt's avatar
Jack Moffitt committed
33

34
#include "cfgfile.h"
Jack Moffitt's avatar
Jack Moffitt committed
35 36 37 38 39 40 41
#include "global.h"
#include "util.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
#include "logging.h"
42
#include "xslt.h"
43
#include "fserve.h"
44 45

#include "yp.h"
Jack Moffitt's avatar
Jack Moffitt committed
46
#include "source.h"
Michael Smith's avatar
Michael Smith committed
47
#include "format.h"
48
#include "format_mp3.h"
Michael Smith's avatar
Michael Smith committed
49
#include "event.h"
50
#include "admin.h"
Jack Moffitt's avatar
Jack Moffitt committed
51 52 53 54

#define CATMODULE "connection"

typedef struct con_queue_tag {
55 56
    connection_t *con;
    struct con_queue_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
57 58 59
} con_queue_t;

typedef struct _thread_queue_tag {
60 61
    thread_type *thread_id;
    struct _thread_queue_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
62 63 64 65 66 67 68 69 70 71 72 73
} 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;

74
rwlock_t _source_shutdown_rwlock;
Jack Moffitt's avatar
Jack Moffitt committed
75 76 77 78 79

static void *_handle_connection(void *arg);

void connection_initialize(void)
{
80 81 82 83 84 85
    if (_initialized) return;
    
    thread_mutex_create(&_connection_mutex);
    thread_mutex_create(&_queue_mutex);
    thread_rwlock_create(&_source_shutdown_rwlock);
    thread_cond_create(&_pool_cond);
86
    thread_cond_create(&global.shutdown_cond);
Jack Moffitt's avatar
Jack Moffitt committed
87

88
    _initialized = 1;
Jack Moffitt's avatar
Jack Moffitt committed
89 90 91 92
}

void connection_shutdown(void)
{
93 94
    if (!_initialized) return;
    
95
    thread_cond_destroy(&global.shutdown_cond);
96 97 98 99
    thread_cond_destroy(&_pool_cond);
    thread_rwlock_destroy(&_source_shutdown_rwlock);
    thread_mutex_destroy(&_queue_mutex);
    thread_mutex_destroy(&_connection_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
100

101
    _initialized = 0;
Jack Moffitt's avatar
Jack Moffitt committed
102 103 104 105
}

static unsigned long _next_connection_id(void)
{
106
    unsigned long id;
Jack Moffitt's avatar
Jack Moffitt committed
107

108 109 110
    thread_mutex_lock(&_connection_mutex);
    id = _current_id++;
    thread_mutex_unlock(&_connection_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
111

112
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
113 114
}

115
connection_t *create_connection(sock_t sock, sock_t serversock, char *ip) {
116 117 118 119
    connection_t *con;
    con = (connection_t *)malloc(sizeof(connection_t));
    memset(con, 0, sizeof(connection_t));
    con->sock = sock;
120
    con->serversock = serversock;
121 122 123
    con->con_time = time(NULL);
    con->id = _next_connection_id();
    con->ip = ip;
Michael Smith's avatar
Michael Smith committed
124 125 126 127

    con->event_number = EVENT_NO_EVENT;
    con->event = NULL;

128
    return con;
129 130
}

131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
static int wait_for_serversock(int timeout)
{
#ifdef HAVE_POLL
    struct pollfd ufds[MAX_LISTEN_SOCKETS];
    int i, ret;

    for(i=0; i < global.server_sockets; i++) {
        ufds[i].fd = global.serversock[i];
        ufds[i].events = POLLIN;
        ufds[i].revents = 0;
    }

    ret = poll(ufds, global.server_sockets, timeout);
    if(ret < 0) {
        return -2;
    }
    else if(ret == 0) {
        return -1;
    }
    else {
151
        int dst;
152
        for(i=0; i < global.server_sockets; i++) {
153
            if(ufds[i].revents & POLLIN)
154
                return ufds[i].fd;
155 156 157 158 159 160 161 162 163
            if(ufds[i].revents & (POLLHUP|POLLERR|POLLNVAL))
            {
                if (ufds[i].revents & (POLLHUP|POLLERR))
                {
                    close (global.serversock[i]);
                    WARN0("Had to close a listening socket");
                }
                global.serversock[i] = -1;
            }
164
        }
165 166 167 168 169 170 171 172 173 174 175
        /* remove any closed sockets */
        for(i=0, dst=0; i < global.server_sockets; i++)
        {
            if (global.serversock[i] == -1)
                continue;
            if (i!=dst)
                global.serversock[dst] = global.serversock[i];
            dst++;
        }
        global.server_sockets = dst;
        return -1;
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192
    }
#else
    fd_set rfds;
    struct timeval tv, *p=NULL;
    int i, ret;
    int max = -1;

    FD_ZERO(&rfds);

    for(i=0; i < global.server_sockets; i++) {
        FD_SET(global.serversock[i], &rfds);
        if(global.serversock[i] > max)
            max = global.serversock[i];
    }

    if(timeout >= 0) {
        tv.tv_sec = timeout/1000;
193
        tv.tv_usec = (timeout % 1000) * 1000;
194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213
        p = &tv;
    }

    ret = select(max+1, &rfds, NULL, NULL, p);
    if(ret < 0) {
        return -2;
    }
    else if(ret == 0) {
        return -1;
    }
    else {
        for(i=0; i < global.server_sockets; i++) {
            if(FD_ISSET(global.serversock[i], &rfds))
                return global.serversock[i];
        }
        return -1; /* Should be impossible, stop compiler warnings */
    }
#endif
}

Jack Moffitt's avatar
Jack Moffitt committed
214 215
static connection_t *_accept_connection(void)
{
216 217 218
    int sock;
    connection_t *con;
    char *ip;
219
    int serversock; 
Jack Moffitt's avatar
Jack Moffitt committed
220

221 222 223
    serversock = wait_for_serversock(100);
    if(serversock < 0)
        return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
224

225 226
    /* malloc enough room for a full IP address (including ipv6) */
    ip = (char *)malloc(MAX_ADDR_LEN);
Jack Moffitt's avatar
Jack Moffitt committed
227

228 229
    sock = sock_accept(serversock, ip, MAX_ADDR_LEN);
    if (sock >= 0) {
230
        con = create_connection(sock, serversock, ip);
Jack Moffitt's avatar
Jack Moffitt committed
231

232 233
        return con;
    }
Jack Moffitt's avatar
Jack Moffitt committed
234

235 236 237 238
    if (!sock_recoverable(sock_error()))
        WARN2("accept() failed with error %d: %s", sock_error(), strerror(sock_error()));
    
    free(ip);
Jack Moffitt's avatar
Jack Moffitt committed
239

240
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
241 242 243 244
}

static void _add_connection(connection_t *con)
{
245
    con_queue_t *node;
Jack Moffitt's avatar
Jack Moffitt committed
246

247 248 249 250 251 252 253
    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);
Jack Moffitt's avatar
Jack Moffitt committed
254 255 256 257 258

}

static void _signal_pool(void)
{
259
    thread_cond_signal(&_pool_cond);
Jack Moffitt's avatar
Jack Moffitt committed
260 261
}

262
static void _push_thread(thread_queue_t **queue, thread_type *thread_id)
Jack Moffitt's avatar
Jack Moffitt committed
263
{
264 265 266 267 268 269 270 271 272 273 274 275 276 277
    /* 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);
Jack Moffitt's avatar
Jack Moffitt committed
278 279
}

280
static thread_type *_pop_thread(thread_queue_t **queue)
Jack Moffitt's avatar
Jack Moffitt committed
281
{
282 283
    thread_type *id;
    thread_queue_t *item;
Jack Moffitt's avatar
Jack Moffitt committed
284

285
    thread_mutex_lock(&_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
286

287 288 289 290 291
    item = *queue;
    if (item == NULL) {
        thread_mutex_unlock(&_queue_mutex);
        return NULL;
    }
Jack Moffitt's avatar
Jack Moffitt committed
292

293 294 295 296
    *queue = item->next;
    item->next = NULL;
    id = item->thread_id;
    free(item);
Jack Moffitt's avatar
Jack Moffitt committed
297

298
    thread_mutex_unlock(&_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
299

300
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
301 302 303 304
}

static void _build_pool(void)
{
305 306
    ice_config_t *config;
    int i;
307
    thread_type *tid;
308
    char buff[64];
Michael Smith's avatar
Michael Smith committed
309
    int threadpool_size;
Jack Moffitt's avatar
Jack Moffitt committed
310

311
    config = config_get_config();
Michael Smith's avatar
Michael Smith committed
312 313
    threadpool_size = config->threadpool_size;
    config_release_config();
Jack Moffitt's avatar
Jack Moffitt committed
314

315 316 317 318 319
    for (i = 0; i < threadpool_size; i++) {
        snprintf(buff, 64, "Connection Thread #%d", i);
        tid = thread_create(buff, _handle_connection, NULL, THREAD_ATTACHED);
        _push_thread(&_conhands, tid);
    }
Jack Moffitt's avatar
Jack Moffitt committed
320 321 322 323
}

static void _destroy_pool(void)
{
324 325 326 327 328 329 330 331 332 333 334 335
    thread_type *id;
    int i;

    i = 0;

    thread_cond_broadcast(&_pool_cond);
    id = _pop_thread(&_conhands);
    while (id != NULL) {
        thread_join(id);
        _signal_pool();
        id = _pop_thread(&_conhands);
    }
Jack Moffitt's avatar
Jack Moffitt committed
336 337 338 339
}

void connection_accept_loop(void)
{
340
    connection_t *con;
Jack Moffitt's avatar
Jack Moffitt committed
341

342
    _build_pool();
Jack Moffitt's avatar
Jack Moffitt committed
343

344 345
    while (global.running == ICE_RUNNING) {
        con = _accept_connection();
Jack Moffitt's avatar
Jack Moffitt committed
346

347 348 349 350 351
        if (con) {
            _add_connection(con);
            _signal_pool();
        }
    }
Jack Moffitt's avatar
Jack Moffitt committed
352

353 354 355
    /* Give all the other threads notification to shut down */
    thread_cond_broadcast(&global.shutdown_cond);

356
    _destroy_pool();
Jack Moffitt's avatar
Jack Moffitt committed
357

358 359 360
    /* wait for all the sources to shutdown */
    thread_rwlock_wlock(&_source_shutdown_rwlock);
    thread_rwlock_unlock(&_source_shutdown_rwlock);
Jack Moffitt's avatar
Jack Moffitt committed
361 362 363 364
}

static connection_t *_get_connection(void)
{
365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390
    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;
Jack Moffitt's avatar
Jack Moffitt committed
391 392
}

Michael Smith's avatar
Michael Smith committed
393 394 395 396 397 398 399 400 401 402
void connection_inject_event(int eventnum, void *event_data) {
    connection_t *con = calloc(1, sizeof(connection_t));

    con->event_number = eventnum;
    con->event = event_data;

    _add_connection(con);
    _signal_pool();
}

403 404 405
/* TODO: Make this return an appropriate error code so that we can use HTTP
 * codes where appropriate
 */
406
int connection_create_source(client_t *client, connection_t *con, http_parser_t *parser, char *mount) {
407 408
    source_t *source;
    char *contenttype;
Michael Smith's avatar
Michael Smith committed
409
    mount_proxy *mountproxy, *mountinfo = NULL;
Michael Smith's avatar
Michael Smith committed
410 411 412 413 414 415
    int source_limit;
    ice_config_t *config;

    config = config_get_config();
    source_limit = config->source_limit;
    config_release_config();
416

417 418 419 420 421 422 423 424 425 426 427 428 429
    /* check to make sure this source wouldn't
    ** be over the limit
    */
    global_lock();
    if (global.sources >= source_limit) {
        INFO1("Source (%s) logged in, but there are too many sources", mount);
        global_unlock();
        return 0;
    }
    global.sources++;
    global_unlock();

    stats_event_inc(NULL, "sources");
Michael Smith's avatar
Michael Smith committed
430
    
Michael Smith's avatar
Michael Smith committed
431 432 433 434 435
    config = config_get_config();
    mountproxy = config->mounts;
    thread_mutex_lock(&(config_locks()->mounts_lock));
    config_release_config();

Michael Smith's avatar
Michael Smith committed
436 437 438 439 440 441 442
    while(mountproxy) {
        if(!strcmp(mountproxy->mountname, mount)) {
            mountinfo = mountproxy;
            break;
        }
        mountproxy = mountproxy->next;
    }
443

444
    contenttype = httpp_getvar(parser, "content-type");
445

446 447 448 449
    if (contenttype != NULL) {
        format_type_t format = format_get_type(contenttype);
        if (format == FORMAT_ERROR) {
            WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
Michael Smith's avatar
Michael Smith committed
450
            thread_mutex_unlock(&(config_locks()->mounts_lock));
451
            goto fail;
452 453
        } else {
            source = source_create(client, con, parser, mount, 
Michael Smith's avatar
Michael Smith committed
454
                    format, mountinfo);
Michael Smith's avatar
Michael Smith committed
455
            thread_mutex_unlock(&(config_locks()->mounts_lock));
456 457
        }
    } else {
458
        format_type_t format = FORMAT_TYPE_MP3;
459
        ERROR0("No content-type header, falling back to backwards compatibility mode for icecast 1.x relays. Assuming content is mp3.");
Michael Smith's avatar
Michael Smith committed
460
        source = source_create(client, con, parser, mount, format, mountinfo);
Michael Smith's avatar
Michael Smith committed
461
        thread_mutex_unlock(&(config_locks()->mounts_lock));
462
    }
463

464
    source->send_return = 1;
465 466 467 468
    source->shutdown_rwlock = &_source_shutdown_rwlock;
    sock_set_blocking(con->sock, SOCK_NONBLOCK);
    thread_create("Source Thread", source_main, (void *)source, THREAD_DETACHED);
    return 1;
469 470 471 472 473 474 475 476

fail:
    global_lock();
    global.sources--;
    global_unlock();

    stats_event_dec(NULL, "sources");
    return 0;
477 478
}

479 480
static int _check_pass_http(http_parser_t *parser, 
        char *correctuser, char *correctpass)
481 482 483 484 485 486 487 488 489 490 491 492 493
{
    /* This will look something like "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==" */
    char *header = httpp_getvar(parser, "authorization");
    char *userpass, *tmp;
    char *username, *password;

    if(header == NULL)
        return 0;

    if(strncmp(header, "Basic ", 6))
        return 0;

    userpass = util_base64_decode(header+6);
494 495 496
    if(userpass == NULL) {
        WARN1("Base64 decode of Authorization header \"%s\" failed",
                header+6);
497
        return 0;
498
    }
499 500 501 502 503 504 505 506 507 508

    tmp = strchr(userpass, ':');
    if(!tmp) {
        free(userpass);
        return 0;
    }
    *tmp = 0;
    username = userpass;
    password = tmp+1;

509
    if(strcmp(username, correctuser) || strcmp(password, correctpass)) {
510 511 512
        free(userpass);
        return 0;
    }
513
    free(userpass);
514 515 516 517

    return 1;
}

518 519 520 521 522 523 524 525
static int _check_pass_icy(http_parser_t *parser, char *correctpass)
{
    char *password;

    password = httpp_getvar(parser, HTTPP_VAR_ICYPASSWORD);
    if(!password)
        return 0;

526
    if (strcmp(password, correctpass))
527 528 529 530 531
        return 0;
    else
        return 1;
}

532
static int _check_pass_ice(http_parser_t *parser, char *correctpass)
533
{
534
    char *password;
535 536 537 538 539

    password = httpp_getvar(parser, "ice-password");
    if(!password)
        password = "";

540
    if (strcmp(password, correctpass))
541 542 543 544 545
        return 0;
    else
        return 1;
}

546
int connection_check_admin_pass(http_parser_t *parser)
547
{
Michael Smith's avatar
Michael Smith committed
548 549 550 551 552
    ice_config_t *config = config_get_config();
    char *pass = config->admin_password;
    char *user = config->admin_username;
    config_release_config();

553 554 555
    if(!pass || !user)
        return 0;

556
    return _check_pass_http(parser, user, pass);
557 558
}

559
int connection_check_source_pass(http_parser_t *parser, char *mount)
560
{
Michael Smith's avatar
Michael Smith committed
561 562
    ice_config_t *config = config_get_config();
    char *pass = config->source_password;
563
    char *user = "source";
564
    int ret;
Michael Smith's avatar
Michael Smith committed
565
    int ice_login = config->ice_login;
566
    char *protocol;
Michael Smith's avatar
Michael Smith committed
567 568 569 570

    mount_proxy *mountinfo = config->mounts;
    thread_mutex_lock(&(config_locks()->mounts_lock));
    config_release_config();
571

572 573
    while(mountinfo) {
        if(!strcmp(mountinfo->mountname, mount)) {
574 575 576 577
            if(mountinfo->password)
                pass = mountinfo->password;
            if(mountinfo->username)
                user = mountinfo->username;
578 579
            break;
        }
580
        mountinfo = mountinfo->next;
581 582
    }

Michael Smith's avatar
Michael Smith committed
583 584
    thread_mutex_unlock(&(config_locks()->mounts_lock));

585 586 587 588 589
    if(!pass) {
        WARN0("No source password set, rejecting source");
        return 0;
    }

590
    protocol = httpp_getvar(parser, HTTPP_VAR_PROTOCOL);
591 592 593 594 595 596 597 598 599 600 601
    if(protocol != NULL && !strcmp(protocol, "ICY")) {
        ret = _check_pass_icy(parser, pass);
    }
    else {
        ret = _check_pass_http(parser, user, pass);
        if(!ret && ice_login)
        {
            ret = _check_pass_ice(parser, pass);
            if(ret)
                WARN0("Source is using deprecated icecast login");
        }
602 603
    }
    return ret;
604 605
}

606 607 608
static void _handle_source_request(connection_t *con, 
        http_parser_t *parser, char *uri)
{
609 610
    client_t *client;

611
    client = client_create(con, parser);
612

613 614
    INFO1("Source logging in at mountpoint \"%s\"", uri);
    stats_event_inc(NULL, "source_connections");
615 616 617
                
    if (!connection_check_source_pass(parser, uri)) {
        INFO1("Source (%s) attempted to login with invalid or missing password", uri);
618
        client_send_401(client);
619
        return;
620
    }
621

622 623 624
    /* check to make sure this source has
    ** a unique mountpoint
    */
625

626 627 628 629
    avl_tree_rlock(global.source_tree);
    if (source_find_mount(uri) != NULL) {
        avl_tree_unlock(global.source_tree);
        INFO1("Source tried to log in as %s, but mountpoint is already used", uri);
630
        client_send_404(client, "Mountpoint in use");
631 632 633
        return;
    }
    avl_tree_unlock(global.source_tree);
634

635
    if (!connection_create_source(client, con, parser, uri)) {
636
        client_send_404(client, "Mountpoint in use");
637
    }
638 639 640 641
}

static void _handle_stats_request(connection_t *con, 
        http_parser_t *parser, char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
642
{
643
    stats_connection_t *stats;
644

645 646 647
    stats_event_inc(NULL, "stats_connections");
                
    if (!connection_check_admin_pass(parser)) {
648
        ERROR0("Bad password for stats connection");
649 650
        connection_close(con);
        httpp_destroy(parser);
651
        return;
652 653 654 655 656 657 658 659 660 661
    }
                    
    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);
662 663 664 665 666 667
}

static void _handle_get_request(connection_t *con,
        http_parser_t *parser, char *uri)
{
    char *fullpath;
668
    client_t *client;
669
    int bytes;
670 671
    struct stat statbuf;
    source_t *source;
Michael Smith's avatar
Michael Smith committed
672 673 674
    int fileserve;
    char *host;
    int port;
675 676 677 678
    int i;
    char *serverhost;
    int serverport;
    aliases *alias;
Michael Smith's avatar
Michael Smith committed
679 680 681 682 683 684 685
    ice_config_t *config;
    int client_limit;

    config = config_get_config();
    fileserve = config->fileserve;
    host = config->hostname;
    port = config->port;
686 687 688 689 690 691 692 693
    for(i = 0; i < MAX_LISTEN_SOCKETS; i++) {
        if(global.serversock[i] == con->serversock) {
            serverhost = config->listeners[i].bind_address;
            serverport = config->listeners[i].port;
            break;
        }
    }
    alias = config->aliases;
Michael Smith's avatar
Michael Smith committed
694 695 696
    client_limit = config->client_limit;
    config_release_config();

697 698 699

    DEBUG0("Client connected");

700 701 702 703 704 705 706
    /* 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 /admin/stats.xml
707
    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
708
    ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
709 710 711 712
    ** we need to handle the latter two before the former, as the latter two
    ** aren't subject to the limits.
    */
    /* TODO: add GUID-xxxxxx */
713

714 715 716 717 718 719 720 721 722
    /* Handle aliases */
    while(alias) {
        if(strcmp(uri, alias->source) == 0 && (alias->port == -1 || alias->port == serverport) && (alias->bind_address == NULL || (serverhost != NULL && strcmp(alias->bind_address, serverhost) == 0))) {
            uri = alias->destination;
            break;
        }
        alias = alias->next;
    }

723
    /* Dispatch all admin requests */
724
    if (strncmp(uri, "/admin/", 7) == 0) {
725
        admin_handle_request(client, uri);
Michael Smith's avatar
Michael Smith committed
726 727 728
        return;
    }

729 730 731 732
    /* Here we are parsing the URI request to see
    ** if the extension is .xsl, if so, then process
    ** this request as an XSLT request
    */
733 734
    fullpath = util_get_path_from_normalised_uri(uri);
    if (util_check_valid_extension(fullpath) == XSLT_CONTENT) {
735 736
        /* If the file exists, then transform it, otherwise, write a 404 */
        if (stat(fullpath, &statbuf) == 0) {
737
            DEBUG0("Stats request, sending XSL transformed stats");
738
            client->respcode = 200;
739
            bytes = sock_write(client->con->sock, 
740 741 742
                    "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n");
            if(bytes > 0) client->con->sent_bytes = bytes;
            stats_transform_xslt(client, fullpath);
743 744 745
            client_destroy(client);
        }
        else {
746
            client_send_404(client, "The file you requested could not be found");
747
        }
748 749
        free(fullpath);
        return;
750
    }
751
    else if(fileserve && stat(fullpath, &statbuf) == 0 && 
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
752
#ifdef _WIN32
753
            ((statbuf.st_mode) & _S_IFREG))
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
754
#else
755
            S_ISREG(statbuf.st_mode)) 
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
756
#endif
Michael Smith's avatar
Michael Smith committed
757
    {
758
        fserve_client_create(client, fullpath);
759 760 761
        free(fullpath);
        return;
    }
762 763 764 765 766 767
    free(fullpath);

    if(strcmp(util_get_extension(uri), "m3u") == 0) {
        char *sourceuri = strdup(uri);
        char *dot = strrchr(sourceuri, '.');
        *dot = 0;
768 769 770
        avl_tree_rlock(global.source_tree);
        source = source_find_mount(sourceuri);
           if (source) {
771 772 773 774
            client->respcode = 200;
            bytes = sock_write(client->con->sock,
                    "HTTP/1.0 200 OK\r\n"
                    "Content-Type: audio/x-mpegurl\r\n\r\n"
775
                    "http://%s:%d%s\r\n", 
Michael Smith's avatar
Michael Smith committed
776 777
                    host, 
                    port,
778 779 780
                    sourceuri
                    );
            if(bytes > 0) client->con->sent_bytes = bytes;
781
            client_destroy(client);
782
        }
Michael Smith's avatar
Michael Smith committed
783
        else if(fileserve) {
784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
            fullpath = util_get_path_from_normalised_uri(sourceuri);
            if(stat(fullpath, &statbuf) == 0) {
                fserve_client_create(client, fullpath);
                free(fullpath);
            }
            else {
                free(fullpath);
                fullpath = util_get_path_from_normalised_uri(uri);
                if(stat(fullpath, &statbuf) == 0) {
                    fserve_client_create(client, fullpath);
                    free(fullpath);
                }
                else {
                    free(fullpath);
                    client_send_404(client, 
                            "The file you requested could not be found");
                }
            }
        }
803 804 805
        else {
            client_send_404(client, "The file you requested could not be found");
        }
806
        avl_tree_unlock(global.source_tree);
807 808 809 810
        free(sourceuri);
        return;
    }

811 812
    global_lock();
    if (global.clients >= client_limit) {
Michael Smith's avatar
Michael Smith committed
813 814
        client_send_504(client,
                "The server is already full. Try again later.");
815
        global_unlock();
816
        return;
817 818 819 820 821 822
    }
    global_unlock();
                    
    avl_tree_rlock(global.source_tree);
    source = source_find_mount(uri);
    if (source) {
823
        DEBUG0("Source found for client");
824 825 826
                        
        global_lock();
        if (global.clients >= client_limit) {
Michael Smith's avatar
Michael Smith committed
827 828
            client_send_504(client, 
                    "The server is already full. Try again later.");
829
            global_unlock();
830 831
            avl_tree_unlock(global.source_tree);
            return;
832
        }
Michael Smith's avatar
Michael Smith committed
833 834 835 836 837
        else if(source->max_listeners != -1 && 
                source->listeners >= source->max_listeners) 
        {
            client_send_504(client, 
                    "Too many clients on this mountpoint. Try again later.");
838
            global_unlock();
Michael Smith's avatar
Michael Smith committed
839 840 841
            avl_tree_unlock(global.source_tree);
            return;
        }
842 843 844
        global.clients++;
        global_unlock();
                        
Michael Smith's avatar
Michael Smith committed
845 846 847 848
        client->format_data = source->format->create_client_data(
                source->format, source, client);

        source->format->client_send_headers(source->format, source, client);
849 850
                        
        bytes = sock_write(client->con->sock, "\r\n");
851
        if(bytes > 0) client->con->sent_bytes += bytes;
852 853
                            
        sock_set_blocking(client->con->sock, SOCK_NONBLOCK);
854
        sock_set_nodelay(client->con->sock);
855 856 857 858 859 860 861 862 863
                        
        avl_tree_wlock(source->pending_tree);
        avl_insert(source->pending_tree, (void *)client);
        avl_tree_unlock(source->pending_tree);
    }
                    
    avl_tree_unlock(global.source_tree);
                    
    if (!source) {
864 865
        DEBUG0("Source not found for client");
        client_send_404(client, "The source you requested could not be found.");
866
    }
867 868 869 870
}

static void *_handle_connection(void *arg)
{
871 872 873
    char header[4096];
    connection_t *con;
    http_parser_t *parser;
874
    char *rawuri, *uri;
875
    client_t *client;
Jack Moffitt's avatar
Jack Moffitt committed
876

877 878
    while (global.running == ICE_RUNNING) {
        memset(header, 0, 4096);
Jack Moffitt's avatar
Jack Moffitt committed
879

880 881
        thread_cond_wait(&_pool_cond);
        if (global.running != ICE_RUNNING) break;
Jack Moffitt's avatar
Jack Moffitt committed
882

883 884
        /* grab a connection and set the socket to blocking */
        while ((con = _get_connection())) {
Michael Smith's avatar
Michael Smith committed
885 886 887 888 889 890 891 892 893 894 895 896 897 898 899

            /* Handle meta-connections */
            if(con->event_number > 0) {
                switch(con->event_number) {
                    case EVENT_CONFIG_READ:
                        event_config_read(con->event);
                        break;
                    default:
                        ERROR1("Unknown event number: %d", con->event_number);
                        break;
                }
                free(con);
                continue;
            }

900
            stats_event_inc(NULL, "connections");
Jack Moffitt's avatar
Jack Moffitt committed
901

902
            sock_set_blocking(con->sock, SOCK_BLOCK);
Jack Moffitt's avatar
Jack Moffitt committed
903

904 905 906 907 908 909
            /* 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 */
                connection_close(con);
                continue;
            }
Jack Moffitt's avatar
Jack Moffitt committed
910

911 912 913 914 915 916
            parser = httpp_create_parser();
            httpp_initialize(parser, NULL);
            if (httpp_parse(parser, header, strlen(header))) {
                /* handle the connection or something */
                
                if (strcmp("ICE",  httpp_getvar(parser, HTTPP_VAR_PROTOCOL)) &&
917
                    strcmp("HTTP", httpp_getvar(parser, HTTPP_VAR_PROTOCOL))) {
918
                    ERROR0("Bad HTTP protocol detected");
919 920 921 922
                    connection_close(con);
                    httpp_destroy(parser);
                    continue;
                }
Jack Moffitt's avatar
Jack Moffitt committed
923

924 925 926 927
                rawuri = httpp_getvar(parser, HTTPP_VAR_URI);
                uri = util_normalise_uri(rawuri);

                if(!uri) {
928
                    client = client_create(con, parser);
929
                    client_send_404(client, "The path you requested was invalid");
930 931
                    continue;
                }
932

933
                if (parser->req_type == httpp_req_source) {
934 935 936 937 938 939 940 941 942
                    _handle_source_request(con, parser, uri);
                }
                else if (parser->req_type == httpp_req_stats) {
                    _handle_stats_request(con, parser, uri);
                }
                else if (parser->req_type == httpp_req_get) {
                    _handle_get_request(con, parser, uri);
                }
                else {
943
                    ERROR0("Wrong request type from client");
944 945
                    connection_close(con);
                    httpp_destroy(parser);
946 947 948
                }

                free(uri);
949
            } 
950 951
            else if(httpp_parse_icy(parser, header, strlen(header))) {
                /* TODO: Map incoming icy connections to /icy_0, etc. */
952 953 954 955 956 957 958 959 960 961 962 963
                char mount[20];
                int i = 0;

                strcpy(mount, "/");

                avl_tree_rlock(global.source_tree);
                while(source_find_mount(mount) != NULL) {
                    sprintf(mount, "/icy_%d", i++);
                }
                avl_tree_unlock(global.source_tree);

                _handle_source_request(con, parser, mount);
964 965
            }
            else {
966
                ERROR0("HTTP request parsing failed");
967 968 969 970 971 972
                connection_close(con);
                httpp_destroy(parser);
                continue;
            }
        }
    }
Jack Moffitt's avatar
Jack Moffitt committed
973

974
    thread_exit(0);
Jack Moffitt's avatar
Jack Moffitt committed
975

976
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
977 978 979 980
}

void connection_close(connection_t *con)
{
981 982 983 984
    sock_close(con->sock);
    if (con->ip) free(con->ip);
    if (con->host) free(con->host);
    free(con);
Jack Moffitt's avatar
Jack Moffitt committed
985
}