connection.c 40.2 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
#include <stdio.h>
#include <stdlib.h>
20
#include <errno.h>
Jack Moffitt's avatar
Jack Moffitt committed
21
#include <string.h>
22
23
24
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
25
26
#include <sys/types.h>
#include <sys/stat.h>
27
28

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

38
#include "compat.h"
Jack Moffitt's avatar
Jack Moffitt committed
39

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

45
#include "cfgfile.h"
Jack Moffitt's avatar
Jack Moffitt committed
46
47
48
49
50
51
52
#include "global.h"
#include "util.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
#include "logging.h"
53
#include "xslt.h"
54
#include "fserve.h"
55
#include "sighandler.h"
56
57

#include "yp.h"
Jack Moffitt's avatar
Jack Moffitt committed
58
#include "source.h"
Michael Smith's avatar
Michael Smith committed
59
#include "format.h"
60
#include "format_mp3.h"
Michael Smith's avatar
Michael Smith committed
61
#include "event.h"
62
#include "admin.h"
Michael Smith's avatar
Michael Smith committed
63
#include "auth.h"
Jack Moffitt's avatar
Jack Moffitt committed
64
65
66

#define CATMODULE "connection"

67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
/* 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

84
85
86
87
88
typedef struct client_queue_tag {
    client_t *client;
    int offset;
    int stream_offset;
    int shoutcast;
89
    char *shoutcast_mount;
90
91
    struct client_queue_tag *next;
} client_queue_t;
Jack Moffitt's avatar
Jack Moffitt committed
92
93

typedef struct _thread_queue_tag {
94
95
    thread_type *thread_id;
    struct _thread_queue_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
96
97
} thread_queue_t;

98
99
100
101
102
103
104
105
typedef struct
{
    char *filename;
    time_t file_recheck;
    time_t file_mtime;
    avl_tree *contents;
} cache_file_contents;

106
static spin_t _connection_lock;
107
static volatile unsigned long _current_id = 0;
Jack Moffitt's avatar
Jack Moffitt committed
108
109
static int _initialized = 0;

110
111
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;
112
113
114
115
116
static int ssl_ok;
#ifdef HAVE_OPENSSL
static SSL_CTX *ssl_ctx;
#endif

117
118
119
/* filtering client connection based on IP */
cache_file_contents banned_ip, allowed_ip;

120
rwlock_t _source_shutdown_rwlock;
Jack Moffitt's avatar
Jack Moffitt committed
121

122
static void _handle_connection(void);
Jack Moffitt's avatar
Jack Moffitt committed
123

124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
static int compare_ip (void *arg, void *a, void *b)
{
    const char *ip = (const char *)a;
    const char *pattern = (const char *)b;

    return strcmp (pattern, ip);
}


static int free_filtered_ip (void*x)
{
    free (x);
    return 1;
}


Jack Moffitt's avatar
Jack Moffitt committed
140
141
void connection_initialize(void)
{
142
143
    if (_initialized) return;
    
144
    thread_spin_create (&_connection_lock);
145
    thread_mutex_create(&move_clients_mutex);
146
    thread_rwlock_create(&_source_shutdown_rwlock);
147
    thread_cond_create(&global.shutdown_cond);
148
149
150
151
    _req_queue = NULL;
    _req_queue_tail = &_req_queue;
    _con_queue = NULL;
    _con_queue_tail = &_con_queue;
Jack Moffitt's avatar
Jack Moffitt committed
152

153
154
155
156
157
158
    banned_ip.contents = NULL;
    banned_ip.file_mtime = 0;

    allowed_ip.contents = NULL;
    allowed_ip.file_mtime = 0;

159
    _initialized = 1;
Jack Moffitt's avatar
Jack Moffitt committed
160
161
162
163
}

void connection_shutdown(void)
{
164
165
    if (!_initialized) return;
    
166
167
168
#ifdef HAVE_OPENSSL
    SSL_CTX_free (ssl_ctx);
#endif
169
170
171
    if (banned_ip.contents)  avl_tree_free (banned_ip.contents, free_filtered_ip);
    if (allowed_ip.contents) avl_tree_free (allowed_ip.contents, free_filtered_ip);
 
172
    thread_cond_destroy(&global.shutdown_cond);
173
    thread_rwlock_destroy(&_source_shutdown_rwlock);
174
    thread_spin_destroy (&_connection_lock);
175
    thread_mutex_destroy(&move_clients_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
176

177
    _initialized = 0;
Jack Moffitt's avatar
Jack Moffitt committed
178
179
180
181
}

static unsigned long _next_connection_id(void)
{
182
    unsigned long id;
Jack Moffitt's avatar
Jack Moffitt committed
183

184
    thread_spin_lock (&_connection_lock);
185
    id = _current_id++;
186
    thread_spin_unlock (&_connection_lock);
Jack Moffitt's avatar
Jack Moffitt committed
187

188
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
189
190
}

191
192

#ifdef HAVE_OPENSSL
193
static void get_ssl_certificate (ice_config_t *config)
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
{
    SSL_METHOD *method;
    ssl_ok = 0;

    SSL_load_error_strings();                /* readable error messages */
    SSL_library_init();                      /* initialize library */

    method = SSLv23_server_method();
    ssl_ctx = SSL_CTX_new (method);

    do
    {
        if (config->cert_file == NULL)
            break;
        if (SSL_CTX_use_certificate_file (ssl_ctx, config->cert_file, SSL_FILETYPE_PEM) <= 0)
        {
            WARN1 ("Invalid cert file %s", config->cert_file);
            break;
        }
        if (SSL_CTX_use_PrivateKey_file (ssl_ctx, config->cert_file, SSL_FILETYPE_PEM) <= 0)
        {
            WARN1 ("Invalid private key file %s", config->cert_file);
            break;
        }
        if (!SSL_CTX_check_private_key (ssl_ctx))
        {
220
            ERROR1 ("Invalid %s - Private key does not match cert public key", config->cert_file);
221
222
223
224
            break;
        }
        ssl_ok = 1;
        INFO1 ("SSL certificate found at %s", config->cert_file);
225
        return;
226
    } while (0);
227
    INFO0 ("No SSL capability on any configured ports");
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
}


/* handlers for reading and writing a connection_t when there is ssl
 * configured on the listening port
 */
static int connection_read_ssl (connection_t *con, void *buf, size_t len)
{
    int bytes = SSL_read (con->ssl, buf, len);

    if (bytes < 0)
    {
        switch (SSL_get_error (con->ssl, bytes))
        {
            case SSL_ERROR_WANT_READ:
            case SSL_ERROR_WANT_WRITE:
                return -1;
        }
        con->error = 1;
    }
    return bytes;
}

static int connection_send_ssl (connection_t *con, const void *buf, size_t len)
{
    int bytes = SSL_write (con->ssl, buf, len);

    if (bytes < 0)
    {
        switch (SSL_get_error (con->ssl, bytes))
        {
            case SSL_ERROR_WANT_READ:
            case SSL_ERROR_WANT_WRITE:
                return -1;
        }
        con->error = 1;
    }
    else
        con->sent_bytes += bytes;
    return bytes;
}
#else

/* SSL not compiled in, so at least log it */
272
static void get_ssl_certificate (ice_config_t *config)
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
{
    ssl_ok = 0;
    INFO0 ("No SSL capability");
}
#endif /* HAVE_OPENSSL */


/* handlers (default) for reading and writing a connection_t, no encrpytion
 * used just straight access to the socket
 */
static int connection_read (connection_t *con, void *buf, size_t len)
{
    int bytes = sock_read_bytes (con->sock, buf, len);
    if (bytes == 0)
        con->error = 1;
    if (bytes == -1 && !sock_recoverable (sock_error()))
        con->error = 1;
    return bytes;
}

static int connection_send (connection_t *con, const void *buf, size_t len)
{
    int bytes = sock_write_bytes (con->sock, buf, len);
    if (bytes < 0)
    {
        if (!sock_recoverable (sock_error()))
            con->error = 1;
    }
    else
        con->sent_bytes += bytes;
    return bytes;
}


307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
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
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
/* function to handle the re-populating of the avl tree containing IP addresses
 * for deciding whether a connection of an incoming request is to be dropped.
 */
static void recheck_ip_file (cache_file_contents *cache)
{
    time_t now = time(NULL);
    if (now >= cache->file_recheck)
    {
        struct stat file_stat;
        FILE *file = NULL;
        int count = 0;
        avl_tree *new_ips;
        char line [MAX_LINE_LEN];

        cache->file_recheck = now + 10;
        if (cache->filename == NULL)
        {
            if (cache->contents)
            {
                avl_tree_free (cache->contents, free_filtered_ip);
                cache->contents = NULL;
            }
            return;
        }
        if (stat (cache->filename, &file_stat) < 0)
        {
            WARN2 ("failed to check status of \"%s\": %s", cache->filename, strerror(errno));
            return;
        }
        if (file_stat.st_mtime == cache->file_mtime)
            return; /* common case, no update to file */

        cache->file_mtime = file_stat.st_mtime;

        file = fopen (cache->filename, "r");
        if (file == NULL)
        {
            WARN2("Failed to open file \"%s\": %s", cache->filename, strerror (errno));
            return;
        }

        new_ips = avl_tree_new (compare_ip, NULL);

        while (get_line (file, line, MAX_LINE_LEN))
        {
            char *str;
            if(!line[0] || line[0] == '#')
                continue;
            count++;
            str = strdup (line);
            if (str)
                avl_insert (new_ips, str);
        }
        fclose (file);
        INFO2 ("%d entries read from file \"%s\"", count, cache->filename);

        if (cache->contents) avl_tree_free (cache->contents, free_filtered_ip);
        cache->contents = new_ips;
    }
}


/* return 0 if the passed ip address is not to be handled by icecast, non-zero otherwise */
static int accept_ip_address (char *ip)
{
    void *result;

    recheck_ip_file (&banned_ip);
    recheck_ip_file (&allowed_ip);

    if (banned_ip.contents)
    {
        if (avl_get_by_key (banned_ip.contents, ip, &result) == 0)
        {
            DEBUG1 ("%s is banned", ip);
            return 0;
        }
    }
    if (allowed_ip.contents)
    {
        if (avl_get_by_key (allowed_ip.contents, ip, &result) == 0)
        {
            DEBUG1 ("%s is allowed", ip);
            return 1;
        }
        else
        {
            DEBUG1 ("%s is not allowed", ip);
            return 0;
        }
    }
    return 1;
}


402
403
connection_t *connection_create (sock_t sock, sock_t serversock, char *ip)
{
404
    connection_t *con;
405
406
407
408
409
410
411
412
    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;
413
414
        con->read = connection_read;
        con->send = connection_send;
415
    }
Michael Smith's avatar
Michael Smith committed
416

417
    return con;
418
419
}

420
421
422
423
424
425
426
427
428
429
430
431
432
/* prepare connection for interacting over a SSL connection
 */
void connection_uses_ssl (connection_t *con)
{
#ifdef HAVE_OPENSSL
    con->read = connection_read_ssl;
    con->send = connection_send_ssl;
    con->ssl = SSL_new (ssl_ctx);
    SSL_set_accept_state (con->ssl);
    SSL_set_fd (con->ssl, con->sock);
#endif
}

433
static sock_t wait_for_serversock(int timeout)
434
435
{
#ifdef HAVE_POLL
436
    struct pollfd ufds [global.server_sockets];
437
438
439
440
441
442
443
444
445
446
    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) {
447
        return SOCK_ERROR;
448
449
    }
    else if(ret == 0) {
450
        return SOCK_ERROR;
451
452
    }
    else {
453
        int dst;
454
        for(i=0; i < global.server_sockets; i++) {
455
            if(ufds[i].revents & POLLIN)
456
                return ufds[i].fd;
457
458
459
460
            if(ufds[i].revents & (POLLHUP|POLLERR|POLLNVAL))
            {
                if (ufds[i].revents & (POLLHUP|POLLERR))
                {
461
                    sock_close (global.serversock[i]);
462
463
                    WARN0("Had to close a listening socket");
                }
464
                global.serversock[i] = SOCK_ERROR;
465
            }
466
        }
467
468
469
        /* remove any closed sockets */
        for(i=0, dst=0; i < global.server_sockets; i++)
        {
470
            if (global.serversock[i] == SOCK_ERROR)
471
472
473
474
475
476
                continue;
            if (i!=dst)
                global.serversock[dst] = global.serversock[i];
            dst++;
        }
        global.server_sockets = dst;
477
        return SOCK_ERROR;
478
479
480
481
482
    }
#else
    fd_set rfds;
    struct timeval tv, *p=NULL;
    int i, ret;
483
    sock_t max = SOCK_ERROR;
484
485
486
487
488

    FD_ZERO(&rfds);

    for(i=0; i < global.server_sockets; i++) {
        FD_SET(global.serversock[i], &rfds);
489
        if (max == SOCK_ERROR || global.serversock[i] > max)
490
491
492
493
494
            max = global.serversock[i];
    }

    if(timeout >= 0) {
        tv.tv_sec = timeout/1000;
495
        tv.tv_usec = (timeout % 1000) * 1000;
496
497
498
499
500
        p = &tv;
    }

    ret = select(max+1, &rfds, NULL, NULL, p);
    if(ret < 0) {
501
        return SOCK_ERROR;
502
503
    }
    else if(ret == 0) {
504
        return SOCK_ERROR;
505
506
507
508
509
510
    }
    else {
        for(i=0; i < global.server_sockets; i++) {
            if(FD_ISSET(global.serversock[i], &rfds))
                return global.serversock[i];
        }
511
        return SOCK_ERROR; /* Should be impossible, stop compiler warnings */
512
513
514
515
    }
#endif
}

516
static connection_t *_accept_connection(int duration)
Jack Moffitt's avatar
Jack Moffitt committed
517
{
518
    sock_t sock, serversock;
519
    char *ip;
Jack Moffitt's avatar
Jack Moffitt committed
520

521
    serversock = wait_for_serversock (duration);
522
    if (serversock == SOCK_ERROR)
523
        return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
524

525
526
    /* malloc enough room for a full IP address (including ipv6) */
    ip = (char *)malloc(MAX_ADDR_LEN);
Jack Moffitt's avatar
Jack Moffitt committed
527

528
    sock = sock_accept(serversock, ip, MAX_ADDR_LEN);
529
    if (sock != SOCK_ERROR)
530
    {
531
        connection_t *con = NULL;
532
533
534
        /* Make any IPv4 mapped IPv6 address look like a normal IPv4 address */
        if (strncmp (ip, "::ffff:", 7) == 0)
            memmove (ip, ip+7, strlen (ip+7)+1);
Jack Moffitt's avatar
Jack Moffitt committed
535

536
537
        if (accept_ip_address (ip))
            con = connection_create (sock, serversock, ip);
538
539
540
541
542
543
544
545
546
547
548
        if (con)
            return con;
        sock_close (sock);
    }
    else
    {
        if (!sock_recoverable(sock_error()))
        {
            WARN2("accept() failed with error %d: %s", sock_error(), strerror(sock_error()));
            thread_sleep (500000);
        }
549
550
551
    }
    free(ip);
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
552
553
554
}


555
556
557
558
559
/* 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
560
{
561
562
    *_con_queue_tail = node;
    _con_queue_tail = (volatile client_queue_t **)&node->next;
Jack Moffitt's avatar
Jack Moffitt committed
563
564
565
}


566
567
568
569
570
571
/* 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
572

573
574
575
576
577
578
579
    /* common case, no new connections so don't bother taking locks */
    if (_con_queue)
    {
        node = (client_queue_t *)_con_queue;
        _con_queue = node->next;
        if (_con_queue == NULL)
            _con_queue_tail = &_con_queue;
580
        node->next = NULL;
581
    }
582
583
    return node;
}
Jack Moffitt's avatar
Jack Moffitt committed
584
585


586
/* run along queue checking for any data that has come in or a timeout */
587
static void process_request_queue (void)
588
589
590
591
592
{
    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
593

594
595
596
597
598
599
    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
600

601
602
603
604
605
606
607
        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
608

609
610
611
612
613
        if (len > 0)
        {
            int pass_it = 1;
            char *ptr;

614
615
            /* handle \n, \r\n and nsvcap which for some strange reason has
             * EOL as \r\r\n */
616
617
618
619
620
621
622
            node->offset += len;
            client->refbuf->data [node->offset] = '\000';
            do
            {
                if (node->shoutcast == 1)
                {
                    /* password line */
623
624
                    if (strstr (client->refbuf->data, "\r\r\n") != NULL)
                        break;
625
626
627
628
629
630
631
                    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 */
632
633
634
635
636
637
                ptr = strstr (client->refbuf->data, "\r\r\n\r\r\n");
                if (ptr)
                {
                    node->stream_offset = (ptr+6) - client->refbuf->data;
                    break;
                }
638
639
640
641
642
643
644
645
646
647
648
649
650
651
                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
652

653
654
655
656
657
658
659
            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);
660
                continue;
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
            }
        }
        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;
676
    }
677
    _handle_connection();
Jack Moffitt's avatar
Jack Moffitt committed
678
679
}

680

681
682
683
684
685
686
687
/* 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)
{
    *_req_queue_tail = node;
    _req_queue_tail = (volatile client_queue_t **)&node->next;
Jack Moffitt's avatar
Jack Moffitt committed
688
689
}

690

691
void connection_accept_loop (void)
Jack Moffitt's avatar
Jack Moffitt committed
692
{
693
    connection_t *con;
694
    ice_config_t *config;
695
    int duration = 300;
696
697
698
699

    config = config_get_config ();
    get_ssl_certificate (config);
    config_release_config ();
Jack Moffitt's avatar
Jack Moffitt committed
700

701
702
    while (global.running == ICE_RUNNING)
    {
703
        con = _accept_connection (duration);
704
705

        if (con)
706
        {
707
708
709
            client_queue_t *node;
            ice_config_t *config;
            client_t *client = NULL;
710
            listener_t *listener;
711

712
713
714
715
            global_lock();
            if (client_create (&client, con, NULL) < 0)
            {
                global_unlock();
716
                client_send_403 (client, "Icecast connection limit reached");
717
718
                /* don't be too eager as this is an imposed hard limit */
                thread_sleep (400000);
719
720
                continue;
            }
721

722
723
724
            /* setup client for reading incoming http */
            client->refbuf->data [PER_CLIENT_REFBUF_SIZE-1] = '\000';

725
726
            if (sock_set_blocking (client->con->sock, 0) || sock_set_nodelay (client->con->sock))
            {
727
                global_unlock();
728
729
730
731
732
                WARN0 ("failed to set tcp options on client connection, dropping");
                client_destroy (client);
                continue;
            }

733
734
735
            node = calloc (1, sizeof (client_queue_t));
            if (node == NULL)
            {
736
                global_unlock();
737
738
739
740
741
742
                client_destroy (client);
                continue;
            }
            node->client = client;

            config = config_get_config();
743
744
745
            listener = config_get_listen_sock (config, client->con);

            if (listener)
746
            {
747
748
749
750
                if (listener->shoutcast_compat)
                    node->shoutcast = 1;
                if (listener->ssl && ssl_ok)
                    connection_uses_ssl (client->con);
751
752
                if (listener->shoutcast_mount)
                    node->shoutcast_mount = strdup (listener->shoutcast_mount);
753
            }
754
            global_unlock();
755
            config_release_config();
756
757
758

            _add_request_queue (node);
            stats_event_inc (NULL, "connections");
759
760
761
762
763
764
            duration = 5;
        }
        else
        {
            if (_req_queue == NULL)
                duration = 300; /* use longer timeouts when nothing waiting */
765
        }
766
        process_request_queue ();
767
    }
Jack Moffitt's avatar
Jack Moffitt committed
768

769
770
771
    /* Give all the other threads notification to shut down */
    thread_cond_broadcast(&global.shutdown_cond);

772
773
774
    /* 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
775
776
}

777
778
779

/* Called when activating a source. Verifies that the source count is not
 * exceeded and applies any initial parameters.
780
 */
781
int connection_complete_source (source_t *source, int response)
782
{
783
    ice_config_t *config;
784
785
786
787

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

788
    config = config_get_config();
789
790
    if (global.sources < config->source_limit)
    {
791
        const char *contenttype;
792
        mount_proxy *mountinfo;
793
794
795
796
797
798
799
800
801
802
803
        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)
            {
                config_release_config();
804
                global_unlock();
805
806
                if (response)
                {
807
                    client_send_403 (source->client, "Content-type not supported");
808
809
                    source->client = NULL;
                }
810
811
812
813
814
815
                WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
                return -1;
            }
        }
        else
        {
816
            WARN0("No content-type header, falling back to backwards compatibility mode "
817
                    "for icecast 1.x relays. Assuming content is mp3.");
818
            format_type = FORMAT_TYPE_GENERIC;
819
820
        }

Karl Heyes's avatar
Karl Heyes committed
821
        if (format_get_plugin (format_type, source) < 0)
822
823
824
        {
            global_unlock();
            config_release_config();
825
826
            if (response)
            {
827
                client_send_403 (source->client, "internal format allocation problem");
828
829
                source->client = NULL;
            }
830
831
832
833
            WARN1 ("plugin format failed for \"%s\"", source->mount);
            return -1;
        }

834
835
836
        global.sources++;
        stats_event_args (NULL, "sources", "%d", global.sources);
        global_unlock();
837

838
839
        source->running = 1;
        mountinfo = config_find_mount (config, source->mount);
840
        source_update_settings (config, source, mountinfo);
841
        config_release_config();
842
        slave_rebuild_mounts();
843
844
845
846
847
848

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

        return 0;
    }
849
    WARN1("Request to add source when maximum source limit "
850
851
852
853
854
            "reached %d", global.sources);

    global_unlock();
    config_release_config();

855
856
    if (response)
    {
857
        client_send_403 (source->client, "too many sources connected");
858
859
        source->client = NULL;
    }
860
861
862
863
864

    return -1;
}


865
static int _check_pass_http(http_parser_t *parser, 
866
        const char *correctuser, const char *correctpass)
867
868
{
    /* This will look something like "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==" */
869
    const char *header = httpp_getvar(parser, "authorization");
870
871
872
873
874
875
876
877
878
879
    char *userpass, *tmp;
    char *username, *password;

    if(header == NULL)
        return 0;

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

    userpass = util_base64_decode(header+6);
880
881
882
    if(userpass == NULL) {
        WARN1("Base64 decode of Authorization header \"%s\" failed",
                header+6);
883
        return 0;
884
    }
885
886
887
888
889
890
891
892
893
894

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

895
    if(strcmp(username, correctuser) || strcmp(password, correctpass)) {
896
897
898
        free(userpass);
        return 0;
    }
899
    free(userpass);
900
901
902
903

    return 1;
}

904
static int _check_pass_icy(http_parser_t *parser, const char *correctpass)
905
{
906
    const char *password;
907
908
909
910
911

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

912
    if (strcmp(password, correctpass))
913
914
915
916
917
        return 0;
    else
        return 1;
}

918
static int _check_pass_ice(http_parser_t *parser, const char *correctpass)
919
{
920
    const char *password;
921
922
923
924
925

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

926
    if (strcmp(password, correctpass))
927
928
929
930
931
        return 0;
    else
        return 1;
}

932
int connection_check_admin_pass(http_parser_t *parser)
933
{
934
    int ret;
Michael Smith's avatar
Michael Smith committed
935
936
937
    ice_config_t *config = config_get_config();
    char *pass = config->admin_password;
    char *user = config->admin_username;
938
    const char *protocol;
939
940
941
942
943
944

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

945
946
947
948
949
    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
950
    config_release_config();
951
952
    return ret;
}
Michael Smith's avatar
Michael Smith committed
953

954
955
956
957
958
int connection_check_relay_pass(http_parser_t *parser)
{
    int ret;
    ice_config_t *config = config_get_config();
    char *pass = config->relay_password;
959
    char *user = config->relay_username;
Michael Smith's avatar
Michael Smith committed
960

961
962
    if(!pass || !user) {
        config_release_config();
963
        return 0;
964
    }
965

966
967
968
    ret = _check_pass_http(parser, user, pass);
    config_release_config();
    return ret;
969
970
}

971
int connection_check_source_pass(http_parser_t *parser, const char *mount)
972
{
Michael Smith's avatar
Michael Smith committed
973
974
    ice_config_t *config = config_get_config();
    char *pass = config->source_password;
975
    char *user = "source";
976
    int ret;
Michael Smith's avatar
Michael Smith committed
977
    int ice_login = config->ice_login;
978
    const char *protocol;
Michael Smith's avatar
Michael Smith committed
979

980
    mount_proxy *mountinfo = config_find_mount (config, mount);
981

982
983
984
985
986
987
    if (mountinfo)
    {
        if (mountinfo->password)
            pass = mountinfo->password;
        if (mountinfo->username)
            user = mountinfo->username;
988
989
990
991
    }

    if(!pass) {
        WARN0("No source password set, rejecting source");
992
        config_release_config();
993
994
995
        return 0;
    }

996
    protocol = httpp_getvar(parser, HTTPP_VAR_PROTOCOL);
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
    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");
        }
1008
    }
1009
    config_release_config();
1010
    return ret;
1011
1012
}

1013

1014
static void _handle_source_request (client_t *client, char *uri, int auth_style)
1015
{
1016
    source_t *source;
1017

1018
    INFO1("Source logging in at mountpoint \"%s\"", uri);
1019

1020
1021
1022
1023
1024
1025
    if (uri[0] != '/')
    {
        WARN0 ("source mountpoint not starting with /");
        client_send_401 (client);
        return;
    }
1026
    if (auth_style == ICECAST_SOURCE_AUTH) {
1027
1028
        if (connection_check_source_pass (client->parser, uri) == 0)
        {
1029
1030
1031
1032
            /* 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 */
1033
            INFO1("Source (%s) attempted to login with invalid or missing password", uri);
1034
1035
1036
            client_send_401(client);
            return;
        }
1037
    }
1038
1039
1040
    source = source_reserve (uri);
    if (source)
    {
1041
1042
1043
        if (auth_style == SHOUTCAST_SOURCE_AUTH) {
            source->shoutcast_compat = 1;
        }
1044
        source->client = client;
1045
1046
        source->parser = client->parser;
        source->con = client->con;
1047
        if (connection_complete_source (source, 1) < 0)
1048
        {
1049
            source_clear_source (source);
1050
1051
1052
            source_free_source (source);
        }
        else
1053
        {
1054
            refbuf_t *ok = refbuf_new (PER_CLIENT_REFBUF_SIZE);
1055
            client->respcode = 200;
1056
            snprintf (ok->data, PER_CLIENT_REFBUF_SIZE,
1057
                    "HTTP/1.0 200 OK\r\n\r\n");
1058
1059
1060
1061
            ok->len = strlen (ok->data);
            /* we may have unprocessed data read in, so don't overwrite it */
            ok->associated = client->refbuf;
            client->refbuf = ok;
1062
1063
            fserve_add_client_callback (client, source_client_callback, source);
        }
1064
1065
1066
    }
    else
    {
1067
        client_send_403 (client, "Mountpoint in use");
1068
        WARN1 ("Mountpoint %s in use", uri);
1069
    }
1070
1071
}

1072

1073
static void _handle_stats_request (client_t *client, char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
1074
{
1075
    stats_event_inc(NULL, "stats_connections");
1076
1077
1078
1079

    if (connection_check_admin_pass (client->parser) == 0)
    {
        client_send_401 (client);
1080
1081
        ERROR0("Bad password for stats connection");
        return;
1082
    }
1083

1084
    client->respcode = 200;
1085
1086
1087
1088
    snprintf (client->refbuf->data, PER_CLIENT_REFBUF_SIZE,
            "HTTP/1.0 200 OK\r\n\r\n");
    client->refbuf->len = strlen (client->refbuf->data);
    fserve_add_client_callback (client, stats_callback, NULL);
1089
1090
}

1091
static void _handle_get_request (client_t *client, char *passed_uri)
1092
{
Michael Smith's avatar
Michael Smith committed
1093
    int port;
Karl Heyes's avatar
Karl Heyes committed
1094
1095
    char *serverhost = NULL;
    int serverport = 0;
1096
    aliases *alias;
Michael Smith's avatar
Michael Smith committed
1097
    ice_config_t *config;
1098
    char *uri = passed_uri;
1099
    listener_t *listen_sock;
Michael Smith's avatar
Michael Smith committed
1100
1101
1102

    config = config_get_config();
    port = config->port;
1103
1104
1105
1106
1107
1108

    listen_sock = config_get_listen_sock (config, client->con);
    if (listen_sock)
    {
        serverhost = listen_sock->bind_address;
        serverport = listen_sock->port;
1109
1110
    }
    alias = config->aliases;
1111

1112
1113
1114
    /* 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
1115
    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
1116
    ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
1117
1118
1119
1120
    ** we need to handle the latter two before the former, as the latter two
    ** aren't subject to the limits.
    */
    /* TODO: add GUID-xxxxxx */
1121

1122
1123
1124
    /* 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))) {
1125
1126
            uri = strdup (alias->destination);
            DEBUG2 ("alias has made %s into %s", passed_uri, uri);
1127
1128
1129
1130
            break;
        }
        alias = alias->next;
    }
1131
1132
1133
    config_release_config();

    stats_event_inc(NULL, "client_connections");
1134

1135
    /* Dispatch all admin requests */
1136
1137
    if ((strcmp(uri, "/admin.cgi") == 0) ||
        (strncmp(uri, "/admin/", 7) == 0)) {
1138
        admin_handle_request(client, uri);