source.c 25 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
21
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
22
#include <ogg/ogg.h>
Michael Smith's avatar
Michael Smith committed
23
#include <errno.h>
24
25

#ifndef _WIN32
26
#include <unistd.h>
Jack Moffitt's avatar
Jack Moffitt committed
27
#include <sys/time.h>
28
#include <sys/socket.h>
29
#else
30
31
#include <winsock2.h>
#include <windows.h>
32
#define snprintf _snprintf
33
#endif
Jack Moffitt's avatar
Jack Moffitt committed
34

Karl Heyes's avatar
Karl Heyes committed
35
36
37
38
#include "thread/thread.h"
#include "avl/avl.h"
#include "httpp/httpp.h"
#include "net/sock.h"
Jack Moffitt's avatar
Jack Moffitt committed
39
40
41
42
43
44

#include "connection.h"
#include "global.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
45
#include "logging.h"
46
#include "cfgfile.h"
47
#include "util.h"
Jack Moffitt's avatar
Jack Moffitt committed
48
#include "source.h"
Michael Smith's avatar
Michael Smith committed
49
#include "format.h"
Michael Smith's avatar
Michael Smith committed
50
#include "auth.h"
Jack Moffitt's avatar
Jack Moffitt committed
51

52
53
54
#undef CATMODULE
#define CATMODULE "source"

Michael Smith's avatar
Michael Smith committed
55
56
#define MAX_FALLBACK_DEPTH 10

57
58
mutex_t move_clients_mutex;

Jack Moffitt's avatar
Jack Moffitt committed
59
60
61
/* avl tree helper */
static int _compare_clients(void *compare_arg, void *a, void *b);
static int _free_client(void *key);
62
static void _parse_audio_info (source_t *source, const char *s);
Karl Heyes's avatar
Karl Heyes committed
63
static void source_shutdown (source_t *source);
Jack Moffitt's avatar
Jack Moffitt committed
64

65
66
67
68
69
70
71
72
/* Allocate a new source with the stated mountpoint, if one already
 * exists with that mountpoint in the global source tree then return
 * NULL.
 */
source_t *source_reserve (const char *mount)
{
    source_t *src = NULL;

73
74
75
76
    if(mount[0] != '/')
        WARN1("Source at \"%s\" does not start with '/', clients will be "
                "unable to connect", mount);

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
    do
    {
        avl_tree_wlock (global.source_tree);
        src = source_find_mount_raw (mount);
        if (src)
        {
            src = NULL;
            break;
        }

        src = calloc (1, sizeof(source_t));
        if (src == NULL)
            break;

        src->client_tree = avl_tree_new(_compare_clients, NULL);
        src->pending_tree = avl_tree_new(_compare_clients, NULL);

        /* make duplicates for strings or similar */
        src->mount = strdup (mount);
        src->max_listeners = -1;

        avl_insert (global.source_tree, src);

    } while (0);

    avl_tree_unlock (global.source_tree);
    return src;
}


Michael Smith's avatar
Michael Smith committed
107
108
109
110
/* Find a mount with this raw name - ignoring fallbacks. You should have the
 * global source tree locked to call this.
 */
source_t *source_find_mount_raw(const char *mount)
Jack Moffitt's avatar
Jack Moffitt committed
111
{
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
    source_t *source;
    avl_node *node;
    int cmp;

    if (!mount) {
        return NULL;
    }
    /* get the root node */
    node = global.source_tree->root->right;
    
    while (node) {
        source = (source_t *)node->key;
        cmp = strcmp(mount, source->mount);
        if (cmp < 0) 
            node = node->left;
        else if (cmp > 0)
            node = node->right;
        else
            return source;
    }
    
    /* didn't find it */
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
135
136
}

137
138

/* Search for mount, if the mount is there but not currently running then
Karl Heyes's avatar
Karl Heyes committed
139
 * check the fallback, and so on.  Must have a global source lock to call
140
141
142
 * this function.
 */
source_t *source_find_mount (const char *mount)
Michael Smith's avatar
Michael Smith committed
143
{
144
    source_t *source = NULL;
Michael Smith's avatar
Michael Smith committed
145
    ice_config_t *config;
146
147
148
149
150
151
152
153
154
155
156
157
    mount_proxy *mountinfo;
    int depth = 0;

    config = config_get_config();
    while (mount != NULL)
    {
        /* limit the number of times through, maybe infinite */
        if (depth > MAX_FALLBACK_DEPTH)
        {
            source = NULL;
            break;
        }
Michael Smith's avatar
Michael Smith committed
158

159
        source = source_find_mount_raw(mount);
Michael Smith's avatar
Michael Smith committed
160

161
        if (source != NULL && source->running)
162
            break;
Michael Smith's avatar
Michael Smith committed
163

164
165
166
167
168
169
170
        /* source is not running, meaning that the fallback is not configured
           within the source, we need to check the mount list */
        mountinfo = config->mounts;
        source = NULL;
        while (mountinfo)
        {
            if (strcmp (mountinfo->mountname, mount) == 0)
Michael Smith's avatar
Michael Smith committed
171
172
173
                break;
            mountinfo = mountinfo->next;
        }
174
175
        if (mountinfo)
            mount = mountinfo->fallback_mount;
Michael Smith's avatar
Michael Smith committed
176
        else
177
178
            mount = NULL;
        depth++;
Michael Smith's avatar
Michael Smith committed
179
180
    }

181
    config_release_config();
Michael Smith's avatar
Michael Smith committed
182
183
184
185
    return source;
}


Jack Moffitt's avatar
Jack Moffitt committed
186
187
int source_compare_sources(void *arg, void *a, void *b)
{
188
189
    source_t *srca = (source_t *)a;
    source_t *srcb = (source_t *)b;
Jack Moffitt's avatar
Jack Moffitt committed
190

191
    return strcmp(srca->mount, srcb->mount);
Jack Moffitt's avatar
Jack Moffitt committed
192
193
}

194
195
196
197
198
199

void source_clear_source (source_t *source)
{
    DEBUG1 ("clearing source \"%s\"", source->mount);
    client_destroy(source->client);
    source->client = NULL;
200
201
    source->parser = NULL;
    source->con = NULL;
202

203
204
205
206
207
208
209
    if (source->dumpfile)
    {
        INFO1 ("Closing dumpfile for %s", source->mount);
        fclose (source->dumpfile);
        source->dumpfile = NULL;
    }

210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
    /* lets kick off any clients that are left on here */
    avl_tree_rlock (source->client_tree);
    while (avl_get_first (source->client_tree))
    {
        avl_delete (source->client_tree,
                avl_get_first (source->client_tree)->key, _free_client);
    }
    avl_tree_unlock (source->client_tree);

    avl_tree_rlock (source->pending_tree);
    while (avl_get_first (source->pending_tree))
    {
        avl_delete (source->pending_tree,
                avl_get_first(source->pending_tree)->key, _free_client);
    }
    avl_tree_unlock (source->pending_tree);

    if (source->format && source->format->free_plugin)
    {
        source->format->free_plugin (source->format);
    }
    source->format = NULL;
232
233
    if (source->yp_public)
        yp_remove (source->mount);
234

Karl Heyes's avatar
Karl Heyes committed
235
236
237
238
    source->burst_point = NULL;
    source->burst_size = 0;
    source->burst_offset = 0;
    source->queue_size = 0;
239
    source->queue_size_limit = 0;
240
241
242
243
    source->listeners = 0;
    source->no_mount = 0;
    source->max_listeners = -1;
    source->yp_public = 0;
244
245
    util_dict_free (source->audio_info);
    source->audio_info = NULL;
246
247
248
249
250
251

    free(source->fallback_mount);
    source->fallback_mount = NULL;

    free(source->dumpfilename);
    source->dumpfilename = NULL;
Karl Heyes's avatar
Karl Heyes committed
252

253
    /* Lets clear out the source queue too */
Karl Heyes's avatar
Karl Heyes committed
254
255
256
257
258
259
260
261
262
263
    while (source->stream_data)
    {
        refbuf_t *p = source->stream_data;
        source->stream_data = p->next;
        /* can be referenced by burst handler as well */
        while (p->_count > 1)
            refbuf_release (p);
        refbuf_release (p);
    }
    source->stream_data_tail = NULL;
264
265
266
}


267
/* Remove the provided source from the global tree and free it */
268
void source_free_source (source_t *source)
Jack Moffitt's avatar
Jack Moffitt committed
269
{
270
271
272
273
274
    DEBUG1 ("freeing source \"%s\"", source->mount);
    avl_tree_wlock (global.source_tree);
    avl_delete (global.source_tree, source, NULL);
    avl_tree_unlock (global.source_tree);

275
276
    avl_tree_free(source->pending_tree, _free_client);
    avl_tree_free(source->client_tree, _free_client);
277
278
279

    free (source->mount);
    free (source);
Jack Moffitt's avatar
Jack Moffitt committed
280

281
    return;
Jack Moffitt's avatar
Jack Moffitt committed
282
}
283

284

285
286
287
client_t *source_find_client(source_t *source, int id)
{
    client_t fakeclient;
288
    void *result;
289
290
291
292
293
294
    connection_t fakecon;

    fakeclient.con = &fakecon;
    fakeclient.con->id = id;

    avl_tree_rlock(source->client_tree);
295
    if(avl_get_by_key(source->client_tree, &fakeclient, &result) == 0)
296
297
298
299
300
301
302
303
    {
        avl_tree_unlock(source->client_tree);
        return result;
    }

    avl_tree_unlock(source->client_tree);
    return NULL;
}
304

305
306
307
308
309
/* Move clients from source to dest provided dest is running
 * and that the stream format is the same.
 * The only lock that should be held when this is called is the
 * source tree lock
 */
310
311
void source_move_clients (source_t *source, source_t *dest)
{
312
313
314
315
    /* we don't want the two write locks to deadlock in here */
    thread_mutex_lock (&move_clients_mutex);

    /* if the destination is not running then we can't move clients */
316
317
318

    if (dest->running == 0)
    {
319
320
        WARN1 ("destination mount %s not running, unable to move clients ", dest->mount);
        thread_mutex_unlock (&move_clients_mutex);
321
322
323
324
        return;
    }

    avl_tree_wlock (dest->pending_tree);
325
    do
326
    {
327
        client_t *client;
328

329
330
        /* we need to move the client and pending trees */
        avl_tree_wlock (source->pending_tree);
331

332
333
334
        if (source->format == NULL)
        {
            INFO1 ("source mount %s is not available", source->mount);
335
            break;
336
337
338
339
340
341
        }
        if (source->format->type != dest->format->type)
        {
            WARN2 ("stream %s and %s are of different types, ignored", source->mount, dest->mount);
            break;
        }
342

343
344
345
346
347
348
349
        while (1)
        {
            avl_node *node = avl_get_first (source->pending_tree);
            if (node == NULL)
                break;
            client = (client_t *)(node->key);
            avl_delete (source->pending_tree, client, NULL);
350

Karl Heyes's avatar
Karl Heyes committed
351
352
            /* switch client to different queue */
            client_set_queue (client, dest->stream_data_tail);
353
354
355
356
357
358
359
360
361
362
363
364
365
            avl_insert (dest->pending_tree, (void *)client);
        }

        avl_tree_wlock (source->client_tree);
        while (1)
        {
            avl_node *node = avl_get_first (source->client_tree);
            if (node == NULL)
                break;

            client = (client_t *)(node->key);
            avl_delete (source->client_tree, client, NULL);

Karl Heyes's avatar
Karl Heyes committed
366
367
            /* switch client to different queue */
            client_set_queue (client, dest->stream_data_tail);
368
369
370
371
372
373
374
375
376
            avl_insert (dest->pending_tree, (void *)client);
        }
        source->listeners = 0;
        stats_event (source->mount, "listeners", "0");
        avl_tree_unlock (source->client_tree);

    } while (0);

    avl_tree_unlock (source->pending_tree);
377
378
379
380
    avl_tree_unlock (dest->pending_tree);
    thread_mutex_unlock (&move_clients_mutex);
}

Karl Heyes's avatar
Karl Heyes committed
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
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
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
/* get some data from the source. The stream data is placed in a refbuf
 * and sent back, however NULL is also valid as in the case of a short
 * timeout and there's no data pending.
 */
static refbuf_t *get_next_buffer (source_t *source)
{
    refbuf_t *refbuf = NULL;
    int delay = 250;

    if (source->short_delay)
        delay = 0;
    while (global.running == ICE_RUNNING && source->running)
    {
        int fds;
        time_t current = time (NULL);

        fds = util_timed_wait_for_fd (source->con->sock, delay);

        if (fds < 0)
        {
            if (! sock_recoverable (sock_error()))
            {
                WARN0 ("Error while waiting on socket, Disconnecting source");
                source->running = 0;
            }
            break;
        }
        if (fds == 0)
        {
            if (source->last_read + (time_t)source->timeout < current)
            {
                DEBUG3 ("last %ld, timeout %ld, now %ld", source->last_read, source->timeout, current);
                WARN0 ("Disconnecting source due to socket timeout");
                source->running = 0;
            }
            break;
        }
        source->last_read = current;
        refbuf = source->format->get_buffer (source);
        if (refbuf)
            break;
    }

    return refbuf;
}


/* general send routine per listener.  The deletion_expected tells us whether
 * the last in the queue is about to disappear, so if this client is still
 * referring to it after writing then drop the client as it's fallen too far
 * behind 
 */ 
static void send_to_listener (source_t *source, client_t *client, int deletion_expected)
{
    int bytes;
    int loop = 10;   /* max number of iterations in one go */
    int total_written = 0;

    /* new users need somewhere to start from */
    if (client->refbuf == NULL)
    {
        /* make clients start at the per source burst point on the queue */
        client_set_queue (client, source->burst_point);
        if (client->refbuf == NULL)
           return;
    }

    while (1)
    {
        /* jump out if client connection has died */
        if (client->con->error)
            break;

        /* lets not send too much to one client in one go, but don't
           sleep for too long if more data can be sent */
        if (total_written > 20000 || loop == 0)
        {
            source->short_delay = 1;
            break;
        }

        loop--;

        bytes = source->format->write_buf_to_client (source->format, client);
        if (bytes <= 0)
            break;  /* can't write any more */

        total_written += bytes;
    }

    /* the refbuf referenced at head (last in queue) may be marked for deletion
     * if so, check to see if this client is still referring to it */
    if (deletion_expected && client->refbuf == source->stream_data)
    {
        DEBUG0("Client has fallen too far behind, removing");
        client->con->error = 1;
    }
}

Jack Moffitt's avatar
Jack Moffitt committed
480

481
static void source_init (source_t *source)
Jack Moffitt's avatar
Jack Moffitt committed
482
{
483
    ice_config_t *config = config_get_config();
484
    char *listenurl, *str;
485
486
    int listen_url_size;

487
    /* 6 for max size of port */
488
489
490
491
492
493
494
495
496
    listen_url_size = strlen("http://") + strlen(config->hostname) +
        strlen(":") + 6 + strlen(source->mount) + 1;

    listenurl = malloc (listen_url_size);
    memset (listenurl, '\000', listen_url_size);
    snprintf (listenurl, listen_url_size, "http://%s:%d%s",
            config->hostname, config->port, source->mount);
    config_release_config();

497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
    /* maybe better in connection.c */
    if ((str = httpp_getvar(source->parser, "ice-public")))
        source->yp_public = atoi(str);
    if ((str = httpp_getvar(source->parser, "icy-pub")))
        source->yp_public = atoi(str);
    if (str == NULL)
       str = "0";
    stats_event (source->mount, "public", str);

    str = httpp_getvar(source->parser, "ice-audio-info");
    source->audio_info = util_dict_new();
    if (str)
    {
        _parse_audio_info (source, str);
        stats_event (source->mount, "audio_info", str);
    }

514
515
    stats_event (source->mount, "listenurl", listenurl);

516
517
518
    if (listenurl) {
        free(listenurl);
    }
519

520
521
522
523
524
525
526
527
528
529
    if (source->dumpfilename != NULL)
    {
        source->dumpfile = fopen (source->dumpfilename, "ab");
        if (source->dumpfile == NULL)
        {
            WARN2("Cannot open dump file \"%s\" for appending: %s, disabling.",
                    source->dumpfilename, strerror(errno));
        }
    }

530
531
532
533
534
535
536
537
538
    /* grab a read lock, to make sure we get a chance to cleanup */
    thread_rwlock_rlock (source->shutdown_rwlock);

    /* start off the statistics */
    source->listeners = 0;
    stats_event_inc (NULL, "sources");
    stats_event_inc (NULL, "source_total_connections");
    stats_event (source->mount, "listeners", "0");
    stats_event (source->mount, "type", source->format->format_description);
539

540
    sock_set_blocking (source->con->sock, SOCK_NONBLOCK);
541

542
    DEBUG0("Source creation complete");
Karl Heyes's avatar
Karl Heyes committed
543
    source->last_read = time (NULL);
544
    source->running = 1;
545

Michael Smith's avatar
Michael Smith committed
546
547
    /*
    ** Now, if we have a fallback source and override is on, we want
548
    ** to steal its clients, because it means we've come back online
Michael Smith's avatar
Michael Smith committed
549
550
551
552
    ** after a failure and they should be gotten back from the waiting
    ** loop or jingle track or whatever the fallback is used for
    */

553
554
555
556
    if (source->fallback_override && source->fallback_mount)
    {
        source_t *fallback_source;

Michael Smith's avatar
Michael Smith committed
557
558
559
        avl_tree_rlock(global.source_tree);
        fallback_source = source_find_mount(source->fallback_mount);

560
561
        if (fallback_source)
            source_move_clients (fallback_source, source);
Michael Smith's avatar
Michael Smith committed
562

563
        avl_tree_unlock(global.source_tree);
Michael Smith's avatar
Michael Smith committed
564
    }
565
566
    if (source->yp_public)
        yp_add (source);
567
568
569
570
571
}


void source_main (source_t *source)
{
Karl Heyes's avatar
Karl Heyes committed
572
573
    unsigned int listeners;
    refbuf_t *refbuf;
574
575
576
577
    client_t *client;
    avl_node *client_node;

    source_init (source);
Michael Smith's avatar
Michael Smith committed
578

579
    while (global.running == ICE_RUNNING && source->running) {
Karl Heyes's avatar
Karl Heyes committed
580
        int remove_from_q;
Jack Moffitt's avatar
Jack Moffitt committed
581

Karl Heyes's avatar
Karl Heyes committed
582
        refbuf = get_next_buffer (source);
583

Karl Heyes's avatar
Karl Heyes committed
584
585
        remove_from_q = 0;
        source->short_delay = 0;
586

Karl Heyes's avatar
Karl Heyes committed
587
588
589
590
        if (refbuf)
        {
            /* append buffer to the in-flight data queue,  */
            if (source->stream_data == NULL)
Michael Smith's avatar
Michael Smith committed
591
            {
Karl Heyes's avatar
Karl Heyes committed
592
593
                source->stream_data = refbuf;
                source->burst_point = refbuf;
594
            }
Karl Heyes's avatar
Karl Heyes committed
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
            if (source->stream_data_tail)
                source->stream_data_tail->next = refbuf;
            source->stream_data_tail = refbuf;
            source->queue_size += refbuf->len;
            /* new buffer is referenced for burst */
            refbuf_addref (refbuf);

            /* new data on queue, so check the burst point */
            source->burst_offset += refbuf->len;
            if (source->burst_offset > source->burst_size)
            {
                if (source->burst_point->next)
                {
                    refbuf_release (source->burst_point);
                    source->burst_point = source->burst_point->next;
                    source->burst_offset -= source->burst_point->len;
611
612
613
                }
            }

Karl Heyes's avatar
Karl Heyes committed
614
615
616
            /* save stream to file */
            if (source->dumpfile && source->format->write_buf_to_file)
                source->format->write_buf_to_file (source, refbuf);
617
        }
Karl Heyes's avatar
Karl Heyes committed
618
619
620
        /* lets see if we have too much data in the queue, but don't remove it until later */
        if (source->queue_size > source->queue_size_limit)
            remove_from_q = 1;
621
622
623
624

        /* acquire write lock on client_tree */
        avl_tree_wlock(source->client_tree);

Karl Heyes's avatar
Karl Heyes committed
625
        listeners = source->listeners;
626
627
628
        client_node = avl_get_first(source->client_tree);
        while (client_node) {
            client = (client_t *)client_node->key;
Karl Heyes's avatar
Karl Heyes committed
629
630
631

            send_to_listener (source, client, remove_from_q);

632
633
634
            if (client->con->error) {
                client_node = avl_get_next(client_node);
                avl_delete(source->client_tree, (void *)client, _free_client);
Michael Smith's avatar
Michael Smith committed
635
                source->listeners--;
636
                DEBUG0("Client removed");
637
638
639
640
641
642
643
644
645
646
647
                continue;
            }
            client_node = avl_get_next(client_node);
        }

        /* acquire write lock on pending_tree */
        avl_tree_wlock(source->pending_tree);

        /** add pending clients **/
        client_node = avl_get_first(source->pending_tree);
        while (client_node) {
Michael Smith's avatar
Michael Smith committed
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
            if(source->max_listeners != -1 && 
                    source->listeners >= source->max_listeners) 
            {
                /* The common case is caught in the main connection handler,
                 * this deals with rarer cases (mostly concerning fallbacks)
                 * and doesn't give the listening client any information about
                 * why they were disconnected
                 */
                client = (client_t *)client_node->key;
                client_node = avl_get_next(client_node);
                avl_delete(source->pending_tree, (void *)client, _free_client);

                INFO0("Client deleted, exceeding maximum listeners for this "
                        "mountpoint.");
                continue;
            }
            
            /* Otherwise, the client is accepted, add it */
666
            avl_insert(source->client_tree, client_node->key);
Michael Smith's avatar
Michael Smith committed
667
668

            source->listeners++;
669
            DEBUG0("Client added");
670
671
672
673
674
675
676
677
            stats_event_inc(NULL, "clients");
            stats_event_inc(source->mount, "connections");

            client_node = avl_get_next(client_node);
        }

        /** clear pending tree **/
        while (avl_get_first(source->pending_tree)) {
Michael Smith's avatar
Michael Smith committed
678
679
680
            avl_delete(source->pending_tree, 
                    avl_get_first(source->pending_tree)->key, 
                    source_remove_client);
681
682
683
684
685
        }

        /* release write lock on pending_tree */
        avl_tree_unlock(source->pending_tree);

Karl Heyes's avatar
Karl Heyes committed
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
        /* update the stats if need be */
        if (source->listeners != listeners)
        {
            INFO2("listener count on %s now %d", source->mount, source->listeners);
            stats_event_args (source->mount, "listeners", "%d", source->listeners);
        }

        /* lets reduce the queue, any lagging clients should of been
         * terminated by now
         */
        if (source->stream_data)
        {
            /* normal unreferenced queue data will have a refcount 1, but
             * burst queue data will be at least 2, active clients will also
             * increase refcount */
            while (source->stream_data->_count == 1)
            {
                refbuf_t *to_go = source->stream_data;

                if (to_go->next == NULL || source->burst_point == to_go)
                {
                    /* this should not happen */
                    ERROR0 ("queue state is unexpected");
                    source->running = 0;
                    break;
                }
                source->stream_data = to_go->next;
                source->queue_size -= to_go->len;
                refbuf_release (to_go);
            }
        }

718
719
720
        /* release write lock on client_tree */
        avl_tree_unlock(source->client_tree);
    }
Karl Heyes's avatar
Karl Heyes committed
721
722
    source_shutdown (source);
}
Jack Moffitt's avatar
Jack Moffitt committed
723

Michael Smith's avatar
Michael Smith committed
724

Karl Heyes's avatar
Karl Heyes committed
725
726
static void source_shutdown (source_t *source)
{
727
    source->running = 0;
728
    INFO1("Source \"%s\" exiting", source->mount);
729

730
731
    /* we have de-activated the source now, so no more clients will be
     * added, now move the listeners we have to the fallback (if any)
732
     */
733
734
735
    if (source->fallback_mount)
    {
        source_t *fallback_source;
Michael Smith's avatar
Michael Smith committed
736

737
738
        avl_tree_rlock(global.source_tree);
        fallback_source = source_find_mount (source->fallback_mount);
Michael Smith's avatar
Michael Smith committed
739

740
741
742
743
744
        if (fallback_source != NULL)
            source_move_clients (source, fallback_source);

        avl_tree_unlock (global.source_tree);
    }
Jack Moffitt's avatar
Jack Moffitt committed
745

746
747
748
    /* delete this sources stats */
    stats_event_dec(NULL, "sources");
    stats_event(source->mount, "listeners", NULL);
Jack Moffitt's avatar
Jack Moffitt committed
749

750
751
752
753
    /* we don't remove the source from the tree here, it may be a relay and
       therefore reserved */
    source_clear_source (source);

754
755
756
    global_lock();
    global.sources--;
    global_unlock();
Jack Moffitt's avatar
Jack Moffitt committed
757

758
759
    /* release our hold on the lock so the main thread can continue cleaning up */
    thread_rwlock_unlock(source->shutdown_rwlock);
Jack Moffitt's avatar
Jack Moffitt committed
760
761
762
763
}

static int _compare_clients(void *compare_arg, void *a, void *b)
{
764
765
766
767
768
    client_t *clienta = (client_t *)a;
    client_t *clientb = (client_t *)b;

    connection_t *cona = clienta->con;
    connection_t *conb = clientb->con;
Jack Moffitt's avatar
Jack Moffitt committed
769

770
771
    if (cona->id < conb->id) return -1;
    if (cona->id > conb->id) return 1;
Jack Moffitt's avatar
Jack Moffitt committed
772

773
    return 0;
Jack Moffitt's avatar
Jack Moffitt committed
774
775
}

776
int source_remove_client(void *key)
Jack Moffitt's avatar
Jack Moffitt committed
777
{
778
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
779
780
781
782
}

static int _free_client(void *key)
{
783
784
785
786
787
788
789
790
791
792
    client_t *client = (client_t *)key;

    global_lock();
    global.clients--;
    global_unlock();
    stats_event_dec(NULL, "clients");
    
    client_destroy(client);
    
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
793
}
794

795
static void _parse_audio_info (source_t *source, const char *s)
796
{
797
    const char *start = s;
Karl Heyes's avatar
Karl Heyes committed
798
    unsigned int len;
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820

    while (start != NULL && *start != '\0')
    {
        if ((s = strchr (start, ';')) == NULL)
            len = strlen (start);
        else
        {
            len = (int)(s - start);
            s++; /* skip passed the ';' */
        }
        if (len)
        {
            char name[100], value[100];
            char *esc;

            sscanf (start, "%199[^=]=%199[^;\r\n]", name, value);
            esc = util_url_unescape (value);
            if (esc)
            {
                util_dict_set (source->audio_info, name, esc);
                stats_event (source->mount, name, value);
                free (esc);
821
822
            }
        }
823
        start = s;
824
825
    }
}
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842


void source_apply_mount (source_t *source, mount_proxy *mountinfo)
{
    DEBUG1("Applying mount information for \"%s\"", source->mount);
    source->max_listeners = mountinfo->max_listeners;
    source->fallback_override = mountinfo->fallback_override;
    source->no_mount = mountinfo->no_mount;
    if (mountinfo->fallback_mount)
    {
        source->fallback_mount = strdup (mountinfo->fallback_mount);
        DEBUG1 ("fallback %s", mountinfo->fallback_mount);
    }
    if (mountinfo->auth_type != NULL)
    {
        source->authenticator = auth_get_authenticator(
                mountinfo->auth_type, mountinfo->auth_options);
843
        stats_event(source->mount, "authenticator", mountinfo->auth_type);
844
845
846
847
848
849
    }
    if (mountinfo->dumpfile)
    {
        DEBUG1("Dumping stream to %s", mountinfo->dumpfile);
        source->dumpfilename = strdup (mountinfo->dumpfile);
    }
850
851
852
853
854
855
856
857
858
859
    if (mountinfo->queue_size_limit)
    {
        source->queue_size_limit = mountinfo->queue_size_limit;
        DEBUG1 ("queue size to %u", source->queue_size_limit);
    }
    if (mountinfo->source_timeout)
    {
        source->timeout = mountinfo->source_timeout;
        DEBUG1 ("source timeout to %u", source->timeout);
    }
Karl Heyes's avatar
Karl Heyes committed
860
861
862
    if (mountinfo->burst_size > -1)
        source->burst_size = mountinfo->burst_size;
    DEBUG1 ("amount to burst on client connect set to %u", source->burst_size);
863
864
865
866
867
868
}


void *source_client_thread (void *arg)
{
    source_t *source = arg;
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
    const char ok_msg[] = "HTTP/1.0 200 OK\r\n\r\n";
    int bytes;

    source->client->respcode = 200;
    bytes = sock_write_bytes (source->client->con->sock, ok_msg, sizeof (ok_msg)-1);
    if (bytes < sizeof (ok_msg)-1)
    {
        global_lock();
        global.sources--;
        global_unlock();
        WARN0 ("Error writing 200 OK message to source client");
    }
    else
    {
        source->client->con->sent_bytes += bytes;
884

885
886
887
        stats_event_inc(NULL, "source_client_connections");
        source_main (source);
    }
888
889
890
891
    source_free_source (source);
    return NULL;
}