source.c 25.1 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
    do
    {
        if ((str = httpp_getvar(source->parser, "ice-public")))
            break;
        if ((str = httpp_getvar(source->parser, "icy-pub")))
            break;
        /* handle header from icecast v2 release */
        if ((str = httpp_getvar(source->parser, "icy-public")))
            break;
        str = "0";
    } while (0);
    source->yp_public = atoi (str);
509 510 511 512 513 514 515 516 517 518
    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);
    }

519 520
    stats_event (source->mount, "listenurl", listenurl);

521 522 523
    if (listenurl) {
        free(listenurl);
    }
524

525 526 527 528 529 530 531 532 533 534
    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));
        }
    }

535 536 537 538 539 540 541 542 543
    /* 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);
544

545
    sock_set_blocking (source->con->sock, SOCK_NONBLOCK);
546

547
    DEBUG0("Source creation complete");
Karl Heyes's avatar
Karl Heyes committed
548
    source->last_read = time (NULL);
549
    source->running = 1;
550

Michael Smith's avatar
Michael Smith committed
551 552
    /*
    ** Now, if we have a fallback source and override is on, we want
553
    ** to steal its clients, because it means we've come back online
Michael Smith's avatar
Michael Smith committed
554 555 556 557
    ** after a failure and they should be gotten back from the waiting
    ** loop or jingle track or whatever the fallback is used for
    */

558 559 560 561
    if (source->fallback_override && source->fallback_mount)
    {
        source_t *fallback_source;

Michael Smith's avatar
Michael Smith committed
562 563 564
        avl_tree_rlock(global.source_tree);
        fallback_source = source_find_mount(source->fallback_mount);

565 566
        if (fallback_source)
            source_move_clients (fallback_source, source);
Michael Smith's avatar
Michael Smith committed
567

568
        avl_tree_unlock(global.source_tree);
Michael Smith's avatar
Michael Smith committed
569
    }
570 571
    if (source->yp_public)
        yp_add (source);
572 573 574 575 576
}


void source_main (source_t *source)
{
Karl Heyes's avatar
Karl Heyes committed
577 578
    unsigned int listeners;
    refbuf_t *refbuf;
579 580 581 582
    client_t *client;
    avl_node *client_node;

    source_init (source);
Michael Smith's avatar
Michael Smith committed
583

584
    while (global.running == ICE_RUNNING && source->running) {
Karl Heyes's avatar
Karl Heyes committed
585
        int remove_from_q;
Jack Moffitt's avatar
Jack Moffitt committed
586

Karl Heyes's avatar
Karl Heyes committed
587
        refbuf = get_next_buffer (source);
588

Karl Heyes's avatar
Karl Heyes committed
589 590
        remove_from_q = 0;
        source->short_delay = 0;
591

Karl Heyes's avatar
Karl Heyes committed
592 593 594 595
        if (refbuf)
        {
            /* append buffer to the in-flight data queue,  */
            if (source->stream_data == NULL)
Michael Smith's avatar
Michael Smith committed
596
            {
Karl Heyes's avatar
Karl Heyes committed
597 598
                source->stream_data = refbuf;
                source->burst_point = refbuf;
599
            }
Karl Heyes's avatar
Karl Heyes committed
600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615
            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;
616 617 618
                }
            }

Karl Heyes's avatar
Karl Heyes committed
619 620 621
            /* save stream to file */
            if (source->dumpfile && source->format->write_buf_to_file)
                source->format->write_buf_to_file (source, refbuf);
622
        }
Karl Heyes's avatar
Karl Heyes committed
623 624 625
        /* 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;
626 627 628 629

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

Karl Heyes's avatar
Karl Heyes committed
630
        listeners = source->listeners;
631 632 633
        client_node = avl_get_first(source->client_tree);
        while (client_node) {
            client = (client_t *)client_node->key;
Karl Heyes's avatar
Karl Heyes committed
634 635 636

            send_to_listener (source, client, remove_from_q);

637 638 639
            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
640
                source->listeners--;
641
                DEBUG0("Client removed");
642 643 644 645 646 647 648 649 650 651 652
                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
653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670
            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 */
671
            avl_insert(source->client_tree, client_node->key);
Michael Smith's avatar
Michael Smith committed
672 673

            source->listeners++;
674
            DEBUG0("Client added");
675 676 677 678 679 680 681 682
            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
683 684 685
            avl_delete(source->pending_tree, 
                    avl_get_first(source->pending_tree)->key, 
                    source_remove_client);
686 687 688 689 690
        }

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

Karl Heyes's avatar
Karl Heyes committed
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722
        /* 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);
            }
        }

723 724 725
        /* release write lock on client_tree */
        avl_tree_unlock(source->client_tree);
    }
Karl Heyes's avatar
Karl Heyes committed
726 727
    source_shutdown (source);
}
Jack Moffitt's avatar
Jack Moffitt committed
728

Michael Smith's avatar
Michael Smith committed
729

Karl Heyes's avatar
Karl Heyes committed
730 731
static void source_shutdown (source_t *source)
{
732
    source->running = 0;
733
    INFO1("Source \"%s\" exiting", source->mount);
734

735 736
    /* 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)
737
     */
738 739 740
    if (source->fallback_mount)
    {
        source_t *fallback_source;
Michael Smith's avatar
Michael Smith committed
741

742 743
        avl_tree_rlock(global.source_tree);
        fallback_source = source_find_mount (source->fallback_mount);
Michael Smith's avatar
Michael Smith committed
744

745 746 747 748 749
        if (fallback_source != NULL)
            source_move_clients (source, fallback_source);

        avl_tree_unlock (global.source_tree);
    }
Jack Moffitt's avatar
Jack Moffitt committed
750

751 752
    /* delete this sources stats */
    stats_event_dec(NULL, "sources");
753
    stats_event(source->mount, NULL, NULL);
Jack Moffitt's avatar
Jack Moffitt committed
754

755 756 757 758
    /* we don't remove the source from the tree here, it may be a relay and
       therefore reserved */
    source_clear_source (source);

759 760 761
    global_lock();
    global.sources--;
    global_unlock();
Jack Moffitt's avatar
Jack Moffitt committed
762

763 764
    /* 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
765 766 767 768
}

static int _compare_clients(void *compare_arg, void *a, void *b)
{
769 770 771 772 773
    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
774

775 776
    if (cona->id < conb->id) return -1;
    if (cona->id > conb->id) return 1;
Jack Moffitt's avatar
Jack Moffitt committed
777

778
    return 0;
Jack Moffitt's avatar
Jack Moffitt committed
779 780
}

781
int source_remove_client(void *key)
Jack Moffitt's avatar
Jack Moffitt committed
782
{
783
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
784 785 786 787
}

static int _free_client(void *key)
{
788 789 790 791 792 793 794 795 796 797
    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
798
}
799

800
static void _parse_audio_info (source_t *source, const char *s)
801
{
802
    const char *start = s;
Karl Heyes's avatar
Karl Heyes committed
803
    unsigned int len;
804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825

    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);
826 827
            }
        }
828
        start = s;
829 830
    }
}
831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847


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);
848
        stats_event(source->mount, "authenticator", mountinfo->auth_type);
849 850 851 852 853 854
    }
    if (mountinfo->dumpfile)
    {
        DEBUG1("Dumping stream to %s", mountinfo->dumpfile);
        source->dumpfilename = strdup (mountinfo->dumpfile);
    }
855 856 857 858 859 860 861 862 863 864
    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
865 866 867
    if (mountinfo->burst_size > -1)
        source->burst_size = mountinfo->burst_size;
    DEBUG1 ("amount to burst on client connect set to %u", source->burst_size);
868 869 870 871 872 873
}


void *source_client_thread (void *arg)
{
    source_t *source = arg;
874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
    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;
889

890 891 892
        stats_event_inc(NULL, "source_client_connections");
        source_main (source);
    }
893 894 895 896
    source_free_source (source);
    return NULL;
}