connection.c 29.8 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
/* Icecast
 *
 * This program is distributed under the GNU General Public License, version 2.
 * A copy of this license is included with this source.
 *
 * Copyright 2000-2004, Jack Moffitt <jack@xiph.org, 
 *                      Michael Smith <msmith@xiph.org>,
 *                      oddsock <oddsock@xiph.org>,
 *                      Karl Heyes <karl@xiph.org>
 *                      and others (see AUTHORS for details).
 */

13
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
14
15
16
17
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

Jack Moffitt's avatar
Jack Moffitt committed
18
19
20
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
21
#include <time.h>
22
23
24
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
25
26
27

#ifndef _WIN32
#include <sys/time.h>
Jack Moffitt's avatar
Jack Moffitt committed
28
29
#include <sys/socket.h>
#include <netinet/in.h>
30
#else
31
#include <winsock2.h>
32
33
#define snprintf _snprintf
#define strcasecmp stricmp
34
#define strncasecmp strnicmp
35
#endif
Jack Moffitt's avatar
Jack Moffitt committed
36
37
38

#include "os.h"

Karl Heyes's avatar
Karl Heyes committed
39
40
41
42
#include "thread/thread.h"
#include "avl/avl.h"
#include "net/sock.h"
#include "httpp/httpp.h"
Jack Moffitt's avatar
Jack Moffitt committed
43

44
#include "cfgfile.h"
Jack Moffitt's avatar
Jack Moffitt committed
45
46
47
48
49
50
51
#include "global.h"
#include "util.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
#include "logging.h"
52
#include "xslt.h"
53
#include "fserve.h"
54
#include "sighandler.h"
55
56

#include "yp.h"
Jack Moffitt's avatar
Jack Moffitt committed
57
#include "source.h"
Michael Smith's avatar
Michael Smith committed
58
#include "format.h"
59
#include "format_mp3.h"
Michael Smith's avatar
Michael Smith committed
60
#include "event.h"
61
#include "admin.h"
Michael Smith's avatar
Michael Smith committed
62
#include "auth.h"
Jack Moffitt's avatar
Jack Moffitt committed
63
64
65

#define CATMODULE "connection"

66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
/* Two different major types of source authentication.
   Shoutcast style is used only by the Shoutcast DSP
   and is a crazy version of HTTP.  It looks like :
     Source Client -> Connects to port + 1
     Source Client -> sends encoder password (plaintext)\r\n
     Icecast -> reads encoder password, if ok, sends OK2\r\n, else disconnects
     Source Client -> reads OK2\r\n, then sends http-type request headers
                      that contain the stream details (icy-name, etc..)
     Icecast -> reads headers, stores them
     Source Client -> starts sending MP3 data
     Source Client -> periodically updates metadata via admin.cgi call

   Icecast auth style uses HTTP and Basic Authorization.
*/
#define SHOUTCAST_SOURCE_AUTH 1
#define ICECAST_SOURCE_AUTH 0

83
84
85
86
87
88
89
typedef struct client_queue_tag {
    client_t *client;
    int offset;
    int stream_offset;
    int shoutcast;
    struct client_queue_tag *next;
} client_queue_t;
Jack Moffitt's avatar
Jack Moffitt committed
90
91

typedef struct _thread_queue_tag {
92
93
    thread_type *thread_id;
    struct _thread_queue_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
94
95
96
} thread_queue_t;

static mutex_t _connection_mutex;
97
static volatile unsigned long _current_id = 0;
Jack Moffitt's avatar
Jack Moffitt committed
98
static int _initialized = 0;
99
static thread_type *tid;
Jack Moffitt's avatar
Jack Moffitt committed
100

101
102
103
104
static volatile client_queue_t *_req_queue = NULL, **_req_queue_tail = &_req_queue;
static volatile client_queue_t *_con_queue = NULL, **_con_queue_tail = &_con_queue;
static mutex_t _con_queue_mutex;
static mutex_t _req_queue_mutex;
Jack Moffitt's avatar
Jack Moffitt committed
105

106
rwlock_t _source_shutdown_rwlock;
Jack Moffitt's avatar
Jack Moffitt committed
107
108
109
110
111

static void *_handle_connection(void *arg);

void connection_initialize(void)
{
112
113
114
    if (_initialized) return;
    
    thread_mutex_create(&_connection_mutex);
115
116
    thread_mutex_create(&_con_queue_mutex);
    thread_mutex_create(&_req_queue_mutex);
117
    thread_mutex_create(&move_clients_mutex);
118
    thread_rwlock_create(&_source_shutdown_rwlock);
119
    thread_cond_create(&global.shutdown_cond);
Jack Moffitt's avatar
Jack Moffitt committed
120

121
    _initialized = 1;
Jack Moffitt's avatar
Jack Moffitt committed
122
123
124
125
}

void connection_shutdown(void)
{
126
127
    if (!_initialized) return;
    
128
    thread_cond_destroy(&global.shutdown_cond);
129
    thread_rwlock_destroy(&_source_shutdown_rwlock);
130
131
    thread_mutex_destroy(&_con_queue_mutex);
    thread_mutex_destroy(&_req_queue_mutex);
132
    thread_mutex_destroy(&_connection_mutex);
133
    thread_mutex_destroy(&move_clients_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
134

135
    _initialized = 0;
Jack Moffitt's avatar
Jack Moffitt committed
136
137
138
139
}

static unsigned long _next_connection_id(void)
{
140
    unsigned long id;
Jack Moffitt's avatar
Jack Moffitt committed
141

142
143
144
    thread_mutex_lock(&_connection_mutex);
    id = _current_id++;
    thread_mutex_unlock(&_connection_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
145

146
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
147
148
}

149
150
connection_t *connection_create (sock_t sock, sock_t serversock, char *ip)
{
151
    connection_t *con;
152
153
154
155
156
157
158
159
160
    con = (connection_t *)calloc(1, sizeof(connection_t));
    if (con)
    {
        con->sock = sock;
        con->serversock = serversock;
        con->con_time = time(NULL);
        con->id = _next_connection_id();
        con->ip = ip;
    }
Michael Smith's avatar
Michael Smith committed
161

162
    return con;
163
164
}

165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
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 {
185
        int dst;
186
        for(i=0; i < global.server_sockets; i++) {
187
            if(ufds[i].revents & POLLIN)
188
                return ufds[i].fd;
189
190
191
192
193
194
195
196
197
            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;
            }
198
        }
199
200
201
202
203
204
205
206
207
208
209
        /* 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;
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
    }
#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;
227
        tv.tv_usec = (timeout % 1000) * 1000;
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
        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
248
249
static connection_t *_accept_connection(void)
{
250
251
252
    int sock;
    connection_t *con;
    char *ip;
253
    int serversock; 
Jack Moffitt's avatar
Jack Moffitt committed
254

255
256
257
    serversock = wait_for_serversock(100);
    if(serversock < 0)
        return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
258

259
260
    /* malloc enough room for a full IP address (including ipv6) */
    ip = (char *)malloc(MAX_ADDR_LEN);
Jack Moffitt's avatar
Jack Moffitt committed
261

262
    sock = sock_accept(serversock, ip, MAX_ADDR_LEN);
263
264
265
266
267
    if (sock >= 0)
    {
        con = connection_create (sock, serversock, ip);
        if (con == NULL)
            free (ip);
Jack Moffitt's avatar
Jack Moffitt committed
268

269
270
        return con;
    }
Jack Moffitt's avatar
Jack Moffitt committed
271

272
273
274
275
    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
276

277
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
278
279
280
}


281
282
283
284
285
/* add client to connection queue. At this point some header information
 * has been collected, so we now pass it onto the connection thread for
 * further processing
 */
static void _add_connection (client_queue_t *node)
Jack Moffitt's avatar
Jack Moffitt committed
286
{
287
288
289
290
    thread_mutex_lock (&_con_queue_mutex);
    *_con_queue_tail = node;
    _con_queue_tail = (volatile client_queue_t **)&node->next;
    thread_mutex_unlock (&_con_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
291
292
293
}


294
295
296
297
298
299
/* this returns queued clients for the connection thread. headers are
 * already provided, but need to be parsed.
 */
static client_queue_t *_get_connection(void)
{
    client_queue_t *node = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
300

301
302
303
304
305
306
307
308
309
    /* common case, no new connections so don't bother taking locks */
    if (_con_queue)
    {
        thread_mutex_lock (&_con_queue_mutex);
        node = (client_queue_t *)_con_queue;
        _con_queue = node->next;
        if (_con_queue == NULL)
            _con_queue_tail = &_con_queue;
        thread_mutex_unlock (&_con_queue_mutex);
310
    }
311
312
    return node;
}
Jack Moffitt's avatar
Jack Moffitt committed
313
314


315
316
317
318
319
320
321
/* run along queue checking for any data that has come in or a timeout */
static void process_request_queue ()
{
    client_queue_t **node_ref = (client_queue_t **)&_req_queue;
    ice_config_t *config = config_get_config ();
    int timeout = config->header_timeout;
    config_release_config();
Jack Moffitt's avatar
Jack Moffitt committed
322

323
324
325
326
327
328
    while (*node_ref)
    {
        client_queue_t *node = *node_ref;
        client_t *client = node->client;
        int len = PER_CLIENT_REFBUF_SIZE - 1 - node->offset;
        char *buf = client->refbuf->data + node->offset;
Jack Moffitt's avatar
Jack Moffitt committed
329

330
331
332
333
334
335
336
        if (len > 0)
        {
            if (client->con->con_time + timeout <= time(NULL))
                len = 0;
            else
                len = client_read_bytes (client, buf, len);
        }
Jack Moffitt's avatar
Jack Moffitt committed
337

338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
        if (len > 0)
        {
            int pass_it = 1;
            char *ptr;

            node->offset += len;
            client->refbuf->data [node->offset] = '\000';
            do
            {
                if (node->shoutcast == 1)
                {
                    /* password line */
                    if (strstr (client->refbuf->data, "\r\n") != NULL)
                        break;
                    if (strstr (client->refbuf->data, "\n") != NULL)
                        break;
                }
                /* stream_offset refers to the start of any data sent after the
                 * http style headers, we don't want to lose those */
                ptr = strstr (client->refbuf->data, "\r\n\r\n");
                if (ptr)
                {
                    node->stream_offset = (ptr+4) - client->refbuf->data;
                    break;
                }
                ptr = strstr (client->refbuf->data, "\n\n");
                if (ptr)
                {
                    node->stream_offset = (ptr+2) - client->refbuf->data;
                    break;
                }
                pass_it = 0;
            } while (0);
Jack Moffitt's avatar
Jack Moffitt committed
371

372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
            if (pass_it)
            {
                if ((client_queue_t **)_req_queue_tail == &(node->next))
                    _req_queue_tail = (volatile client_queue_t **)node_ref;
                *node_ref = node->next;
                node->next = NULL;
                _add_connection (node);
            }
        }
        else
        {
            if (len == 0 || client->con->error)
            {
                if ((client_queue_t **)_req_queue_tail == &node->next)
                    _req_queue_tail = (volatile client_queue_t **)node_ref;
                *node_ref = node->next;
                client_destroy (client);
                free (node);
                continue;
            }
        }
        node_ref = &node->next;
394
    }
Jack Moffitt's avatar
Jack Moffitt committed
395
396
}

397

398
399
400
401
402
403
404
405
406
/* add node to the queue of requests. This is where the clients are when
 * initial http details are read.
 */
static void _add_request_queue (client_queue_t *node)
{
    thread_mutex_lock (&_req_queue_mutex);
    *_req_queue_tail = node;
    _req_queue_tail = (volatile client_queue_t **)&node->next;
    thread_mutex_unlock (&_req_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
407
408
}

409

Jack Moffitt's avatar
Jack Moffitt committed
410
411
void connection_accept_loop(void)
{
412
    connection_t *con;
Jack Moffitt's avatar
Jack Moffitt committed
413

414
    tid = thread_create ("connection thread", _handle_connection, NULL, THREAD_ATTACHED);
Jack Moffitt's avatar
Jack Moffitt committed
415

416
417
    while (global.running == ICE_RUNNING)
    {
418
419
420
        con = _accept_connection();

        if (con)
421
        {
422
423
424
425
            client_queue_t *node;
            ice_config_t *config;
            int i;
            client_t *client = NULL;
426

427
428
429
430
431
432
433
434
            global_lock();
            if (client_create (&client, con, NULL) < 0)
            {
                global_unlock();
                client_send_404 (client, "Icecast connection limit reached");
                continue;
            }
            global_unlock();
435

436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
            /* setup client for reading incoming http */
            client->refbuf = refbuf_new (PER_CLIENT_REFBUF_SIZE);
            client->refbuf->data [PER_CLIENT_REFBUF_SIZE-1] = '\000';
            client->refbuf->len = 0; /* force reader code to ignore buffer */

            node = calloc (1, sizeof (client_queue_t));
            if (node == NULL)
            {
                client_destroy (client);
                continue;
            }
            node->client = client;

            /* Check for special shoutcast compatability processing */
            config = config_get_config();
            for (i = 0; i < global.server_sockets; i++)
            {
                if (global.serversock[i] == con->serversock)
                {
                    if (config->listeners[i].shoutcast_compat)
                        node->shoutcast = 1;
                }
            }
            config_release_config(); 

            sock_set_blocking (client->con->sock, SOCK_NONBLOCK);
            sock_set_nodelay (client->con->sock);
Jack Moffitt's avatar
Jack Moffitt committed
463

464
465
            _add_request_queue (node);
            stats_event_inc (NULL, "connections");
466
        }
467
        process_request_queue ();
468
    }
Jack Moffitt's avatar
Jack Moffitt committed
469

470
471
472
    /* Give all the other threads notification to shut down */
    thread_cond_broadcast(&global.shutdown_cond);

473
474
    if (tid)
        thread_join (tid);
Jack Moffitt's avatar
Jack Moffitt committed
475

476
477
478
    /* 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
479
480
}

481
482
483

/* Called when activating a source. Verifies that the source count is not
 * exceeded and applies any initial parameters.
484
 */
485
486
487
488
489
490
491
492
493
494
int connection_complete_source (source_t *source)
{
    ice_config_t *config = config_get_config();

    global_lock ();
    DEBUG1 ("sources count is %d", global.sources);

    if (global.sources < config->source_limit)
    {
        char *contenttype;
495
        mount_proxy *mountinfo;
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
        format_type_t format_type;

        /* setup format handler */
        contenttype = httpp_getvar (source->parser, "content-type");
        if (contenttype != NULL)
        {
            format_type = format_get_type (contenttype);

            if (format_type == FORMAT_ERROR)
            {
                global_unlock();
                config_release_config();
                if (source->client)
                    client_send_404 (source->client, "Content-type not supported");
                WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
                return -1;
            }
        }
        else
        {
516
            WARN0("No content-type header, falling back to backwards compatibility mode "
517
                    "for icecast 1.x relays. Assuming content is mp3.");
518
            format_type = FORMAT_TYPE_GENERIC;
519
520
        }

Karl Heyes's avatar
Karl Heyes committed
521
        if (format_get_plugin (format_type, source) < 0)
522
523
524
525
526
527
        {
            global_unlock();
            config_release_config();
            if (source->client)
                client_send_404 (source->client, "internal format allocation problem");
            WARN1 ("plugin format failed for \"%s\"", source->mount);
528
            source->client = NULL;
529
530
531
532
533
534
535
536
537
            return -1;
        }

        /* for relays, we don't yet have a client, however we do require one
         * to retrieve the stream from.  This is created here, quite late,
         * because we can't use this client to return an error code/message,
         * so we only do this once we know we're going to accept the source.
         */
        if (source->client == NULL)
538
        {
539
            if (client_create (&source->client, source->con, source->parser) < 0)
540
541
542
543
544
545
546
547
548
549
            {
                config_release_config();
                global_unlock();
                connection_close (source->con);
                source->con = NULL;
                httpp_destroy (source->parser);
                source->parser = NULL;
                return -1;
            }
        }
550
551
552
        global.sources++;
        stats_event_args (NULL, "sources", "%d", global.sources);
        global_unlock();
553

554
555
556
557
558
        source->running = 1;
        mountinfo = config_find_mount (config, source->mount);
        if (mountinfo == NULL)
            source_update_settings (config, source, mountinfo);
        source_recheck_mounts ();
559
560
561
562
563
564
565
        config_release_config();

        source->shutdown_rwlock = &_source_shutdown_rwlock;
        DEBUG0 ("source is ready to start");

        return 0;
    }
566
    WARN1("Request to add source when maximum source limit "
567
568
569
570
571
572
573
574
575
576
577
578
            "reached %d", global.sources);

    global_unlock();
    config_release_config();

    if (source->client)
        client_send_404 (source->client, "too many sources connected");

    return -1;
}


579
580
static int _check_pass_http(http_parser_t *parser, 
        char *correctuser, char *correctpass)
581
582
583
584
585
586
587
588
589
590
591
592
593
{
    /* 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);
594
595
596
    if(userpass == NULL) {
        WARN1("Base64 decode of Authorization header \"%s\" failed",
                header+6);
597
        return 0;
598
    }
599
600
601
602
603
604
605
606
607
608

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

609
    if(strcmp(username, correctuser) || strcmp(password, correctpass)) {
610
611
612
        free(userpass);
        return 0;
    }
613
    free(userpass);
614
615
616
617

    return 1;
}

618
619
620
621
622
623
624
625
static int _check_pass_icy(http_parser_t *parser, char *correctpass)
{
    char *password;

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

626
    if (strcmp(password, correctpass))
627
628
629
630
631
        return 0;
    else
        return 1;
}

632
static int _check_pass_ice(http_parser_t *parser, char *correctpass)
633
{
634
    char *password;
635
636
637
638
639

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

640
    if (strcmp(password, correctpass))
641
642
643
644
645
        return 0;
    else
        return 1;
}

646
int connection_check_admin_pass(http_parser_t *parser)
647
{
648
    int ret;
Michael Smith's avatar
Michael Smith committed
649
650
651
    ice_config_t *config = config_get_config();
    char *pass = config->admin_password;
    char *user = config->admin_username;
652
    char *protocol;
653
654
655
656
657
658

    if(!pass || !user) {
        config_release_config();
        return 0;
    }

659
660
661
662
663
    protocol = httpp_getvar (parser, HTTPP_VAR_PROTOCOL);
    if (protocol && strcmp (protocol, "ICY") == 0)
        ret = _check_pass_icy (parser, pass);
    else 
        ret = _check_pass_http (parser, user, pass);
Michael Smith's avatar
Michael Smith committed
664
    config_release_config();
665
666
    return ret;
}
Michael Smith's avatar
Michael Smith committed
667

668
669
670
671
672
int connection_check_relay_pass(http_parser_t *parser)
{
    int ret;
    ice_config_t *config = config_get_config();
    char *pass = config->relay_password;
673
    char *user = config->relay_username;
Michael Smith's avatar
Michael Smith committed
674

675
676
    if(!pass || !user) {
        config_release_config();
677
        return 0;
678
    }
679

680
681
682
    ret = _check_pass_http(parser, user, pass);
    config_release_config();
    return ret;
683
684
}

685
int connection_check_source_pass(http_parser_t *parser, const char *mount)
686
{
Michael Smith's avatar
Michael Smith committed
687
688
    ice_config_t *config = config_get_config();
    char *pass = config->source_password;
689
    char *user = "source";
690
    int ret;
Michael Smith's avatar
Michael Smith committed
691
    int ice_login = config->ice_login;
692
    char *protocol;
Michael Smith's avatar
Michael Smith committed
693

694
    mount_proxy *mountinfo = config_find_mount (config, mount);
695

696
697
698
699
700
701
    if (mountinfo)
    {
        if (mountinfo->password)
            pass = mountinfo->password;
        if (mountinfo->username)
            user = mountinfo->username;
702
703
704
705
    }

    if(!pass) {
        WARN0("No source password set, rejecting source");
706
        config_release_config();
707
708
709
        return 0;
    }

710
    protocol = httpp_getvar(parser, HTTPP_VAR_PROTOCOL);
711
712
713
714
715
716
717
718
719
720
721
    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");
        }
722
    }
723
    config_release_config();
724
    return ret;
725
726
}

727

728
static void _handle_source_request (client_t *client, char *uri, int auth_style)
729
{
730
    source_t *source;
731

732
    INFO1("Source logging in at mountpoint \"%s\"", uri);
733

734
735
736
737
738
739
    if (uri[0] != '/')
    {
        WARN0 ("source mountpoint not starting with /");
        client_send_401 (client);
        return;
    }
740
    if (auth_style == ICECAST_SOURCE_AUTH) {
741
742
        if (connection_check_source_pass (client->parser, uri) == 0)
        {
743
744
745
746
            /* We commonly get this if the source client is using the wrong
             * protocol: attempt to diagnose this and return an error
             */
            /* TODO: Do what the above comment says */
747
            INFO1("Source (%s) attempted to login with invalid or missing password", uri);
748
749
750
            client_send_401(client);
            return;
        }
751
    }
752
753
754
    source = source_reserve (uri);
    if (source)
    {
755
756
757
        if (auth_style == SHOUTCAST_SOURCE_AUTH) {
            source->shoutcast_compat = 1;
        }
758
        source->client = client;
759
760
        source->parser = client->parser;
        source->con = client->con;
761
762
763
764
765
766
767
768
769
770
771
772
        if (connection_complete_source (source) < 0)
        {
            source->client = NULL;
            source_free_source (source);
        }
        else
            thread_create ("Source Thread", source_client_thread,
                    source, THREAD_DETACHED);
    }
    else
    {
        client_send_404 (client, "Mountpoint in use");
773
        WARN1 ("Mountpoint %s in use", uri);
774
    }
775
776
}

777

778
static void _handle_stats_request (client_t *client, char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
779
{
780
    stats_event_inc(NULL, "stats_connections");
781
782
783
784

    if (connection_check_admin_pass (client->parser) == 0)
    {
        client_send_401 (client);
785
786
        ERROR0("Bad password for stats connection");
        return;
787
    }
788

789
790
791
792
793
794
795
    client->respcode = 200;
    if (sock_write (client->con->sock, "HTTP/1.0 200 OK\r\n\r\n") < 19)
    {
        client_destroy (client);
        ERROR0 ("failed to write header");
        return;
    }
796
797

    thread_create("Stats Connection", stats_connection, (void *)client, THREAD_DETACHED);
798
799
}

800
static void _handle_get_request (client_t *client, char *passed_uri)
801
{
Michael Smith's avatar
Michael Smith committed
802
803
    int fileserve;
    int port;
804
    int i;
Karl Heyes's avatar
Karl Heyes committed
805
806
    char *serverhost = NULL;
    int serverport = 0;
807
    aliases *alias;
Michael Smith's avatar
Michael Smith committed
808
    ice_config_t *config;
809
    char *uri = passed_uri;
Michael Smith's avatar
Michael Smith committed
810
811
812
813

    config = config_get_config();
    fileserve = config->fileserve;
    port = config->port;
814
    for(i = 0; i < global.server_sockets; i++) {
815
        if(global.serversock[i] == client->con->serversock) {
816
817
818
819
820
821
            serverhost = config->listeners[i].bind_address;
            serverport = config->listeners[i].port;
            break;
        }
    }
    alias = config->aliases;
822

823
824
825
    /* 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
826
    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
827
    ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
828
829
830
831
    ** we need to handle the latter two before the former, as the latter two
    ** aren't subject to the limits.
    */
    /* TODO: add GUID-xxxxxx */
832

833
834
835
    /* 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))) {
836
837
            uri = strdup (alias->destination);
            DEBUG2 ("alias has made %s into %s", passed_uri, uri);
838
839
840
841
            break;
        }
        alias = alias->next;
    }
842
843
844
    config_release_config();

    stats_event_inc(NULL, "client_connections");
845

846
    /* Dispatch all admin requests */
847
848
    if ((strcmp(uri, "/admin.cgi") == 0) ||
        (strncmp(uri, "/admin/", 7) == 0)) {
849
        admin_handle_request(client, uri);
850
        if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
851
852
853
        return;
    }

854
855
856
857
    /* Here we are parsing the URI request to see
    ** if the extension is .xsl, if so, then process
    ** this request as an XSLT request
    */
858
859
    if (util_check_valid_extension (uri) == XSLT_CONTENT)
    {
860
        /* If the file exists, then transform it, otherwise, write a 404 */
861
862
        DEBUG0("Stats request, sending XSL transformed stats");
        stats_transform_xslt (client, uri);
863
        if (uri != passed_uri) free (uri);
864
        return;
865
    }
866

867
    add_client (uri, client);
868
    if (uri != passed_uri) free (uri);
869
870
}

871
872
static void _handle_shoutcast_compatible (client_queue_t *node)
{
873
874
875
    char *http_compliant;
    int http_compliant_len = 0;
    http_parser_t *parser;
876
877
878
    ice_config_t *config = config_get_config ();
    char *shoutcast_mount;
    client_t *client = node->client;
879

880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
    if (node->shoutcast == 1)
    {
        char *source_password, *ptr;
        mount_proxy *mountinfo = config_find_mount (config, config->shoutcast_mount);

        if (mountinfo && mountinfo->password)
            source_password = strdup (mountinfo->password);
        else
            source_password = strdup (config->source_password);
        config_release_config();

        /* Get rid of trailing \r\n or \n after password */
        ptr = strstr (client->refbuf->data, "\r\n");
        if (ptr == NULL)
            ptr = strstr (client->refbuf->data, "\n");

        if (ptr == NULL)
        {
            client_destroy (client);
            free (source_password);
            free (node);
            return;
        }
        *ptr = '\0';

        if (strcmp (client->refbuf->data, source_password) == 0)
        {
            client->respcode = 200;
            /* send this non-blocking but if there is only a partial write
             * then leave to header timeout */
            sock_write (client->con->sock, "OK2\r\n");
            memset (client->refbuf->data, 0, client->refbuf->len);
            node->shoutcast = 2;
            node->offset = 0;
            /* we've checked the password, now send it back for reading headers */
            _add_request_queue (node);
            free (source_password);
            return;
        }
        client_destroy (client);
        free (node);
921
922
        return;
    }
923
924
    shoutcast_mount = strdup (config->shoutcast_mount);
    config_release_config();
925
926
927
    /* Here we create a valid HTTP request based of the information
       that was passed in via the non-HTTP style protocol above. This
       means we can use some of our existing code to handle this case */
928
    http_compliant_len = 20 + strlen (shoutcast_mount) + node->offset;
929
    http_compliant = (char *)calloc(1, http_compliant_len);
930
    snprintf (http_compliant, http_compliant_len,
931
            "SOURCE %s HTTP/1.0\r\n%s", shoutcast_mount, client->refbuf->data);
932
933
    parser = httpp_create_parser();
    httpp_initialize(parser, NULL);
934
935
    if (httpp_parse (parser, http_compliant, strlen(http_compliant)))
    {
936
937
938
939
        /* we may have more than just headers, so prepare for it */
        if (node->stream_offset == node->offset)
            client->refbuf->len = 0;
        else
940
        {
941
942
943
            char *ptr = client->refbuf->data;
            client->refbuf->len = node->offset - node->stream_offset;
            memmove (ptr, ptr + node->stream_offset, client->refbuf->len);
944
        }
945
946
        client->parser = parser;
        _handle_source_request (client, shoutcast_mount, SHOUTCAST_SOURCE_AUTH);
947
    }
948
949
    else
        client_destroy (client);
950
    free (http_compliant);
951
952
953
    free (shoutcast_mount);
    free (node);
    return;
954
955
}

956
957
958
959
960

/* Connection thread. Here we take clients off the connection queue and check
 * the contents provided. We set up the parser then hand off to the specific
 * request handler.
 */
961
962
static void *_handle_connection(void *arg)
{
963
    http_parser_t *parser;
964
    char *rawuri, *uri;
Jack Moffitt's avatar
Jack Moffitt committed
965

966
    while (global.running == ICE_RUNNING) {
Jack Moffitt's avatar
Jack Moffitt committed
967

968
        client_queue_t *node = _get_connection();
Michael Smith's avatar
Michael Smith committed
969

970
971
972
        if (node)
        {
            client_t *client = node->client;
Jack Moffitt's avatar
Jack Moffitt committed
973

974
            /* Check for special shoutcast compatability processing */
975
976
977
            if (node->shoutcast) 
            {
                _handle_shoutcast_compatible (node);
978
979
                continue;
            }
Jack Moffitt's avatar
Jack Moffitt committed
980

981
            /* process normal HTTP headers */
982
983
            parser = httpp_create_parser();
            httpp_initialize(parser, NULL);
984
985
986
987
988
989
990
991
992
993
994
995
996
            client->parser = parser;
            if (httpp_parse (parser, client->refbuf->data, node->offset))
            {
                /* we may have more than just headers, so prepare for it */
                if (node->stream_offset == node->offset)
                    client->refbuf->len = 0;
                else
                {
                    char *ptr = client->refbuf->data;
                    client->refbuf->len = node->offset - node->stream_offset;
                    memmove (ptr, ptr + node->stream_offset, client->refbuf->len);
                }
                free (node);
997
998
                
                if (strcmp("ICE",  httpp_getvar(parser, HTTPP_VAR_PROTOCOL)) &&
999
                    strcmp("HTTP", httpp_getvar(parser, HTTPP_VAR_PROTOCOL))) {
1000
                    ERROR0("Bad HTTP protocol detected");
1001
                    client_destroy (client);
1002
1003
                    continue;
                }
Jack Moffitt's avatar
Jack Moffitt committed
1004

1005
1006
1007
                rawuri = httpp_getvar(parser, HTTPP_VAR_URI);
                uri = util_normalise_uri(rawuri);

1008
1009
                if (uri == NULL)
                {
1010
                    client_destroy (client);
1011
1012
                    continue;
                }
1013

1014
                if (parser->req_type == httpp_req_source) {
1015
                    _handle_source_request (client, uri, ICECAST_SOURCE_AUTH);
1016
1017
                }
                else if (parser->req_type == httpp_req_stats) {
1018
                    _handle_stats_request (client, uri);
1019
1020
                }
                else if (parser->req_type == httpp_req_get) {
1021
                    _handle_get_request (client, uri);
1022
1023
                }
                else {
1024
                    ERROR0("Wrong request type from client");
1025
                    client_send_400 (client, "unknown request");
1026
1027
1028
                }

                free(uri);
1029
            } 
1030
1031
1032
            else
            {
                free (node);
1033
                ERROR0("HTTP request parsing failed");
1034
                client_destroy (client);
1035
            }
1036
            continue;
1037
        }
1038
        thread_sleep (50000);
1039
    }
1040
    DEBUG0 ("Connection thread done");
Jack Moffitt's avatar
Jack Moffitt committed
1041

1042
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
1043
1044
1045
1046
}

void connection_close(connection_t *con)
{
1047
1048
1049
1050
    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
1051
}