connection.c 40.9 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
/* 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).
11
12
 * Copyright 2011,      Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
 *                      Dave 'justdave' Miller <justdave@mozilla.com>.
13
14
 */

15
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
16
17
18
19
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

Jack Moffitt's avatar
Jack Moffitt committed
20
21
#include <stdio.h>
#include <stdlib.h>
22
#include <errno.h>
Jack Moffitt's avatar
Jack Moffitt committed
23
#include <string.h>
24
25
26
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
27
28
#include <sys/types.h>
#include <sys/stat.h>
29
30

#ifndef _WIN32
Jack Moffitt's avatar
Jack Moffitt committed
31
32
#include <sys/socket.h>
#include <netinet/in.h>
33
#else
34
#include <winsock2.h>
35
36
#define snprintf _snprintf
#define strcasecmp stricmp
37
#define strncasecmp strnicmp
38
#endif
Jack Moffitt's avatar
Jack Moffitt committed
39

40
#include "compat.h"
Jack Moffitt's avatar
Jack Moffitt committed
41

Karl Heyes's avatar
Karl Heyes committed
42
43
44
45
#include "thread/thread.h"
#include "avl/avl.h"
#include "net/sock.h"
#include "httpp/httpp.h"
Jack Moffitt's avatar
Jack Moffitt committed
46

47
#include "cfgfile.h"
Jack Moffitt's avatar
Jack Moffitt committed
48
49
50
51
52
53
54
#include "global.h"
#include "util.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
#include "logging.h"
55
#include "xslt.h"
56
#include "fserve.h"
57
#include "sighandler.h"
58
59

#include "yp.h"
Jack Moffitt's avatar
Jack Moffitt committed
60
#include "source.h"
Michael Smith's avatar
Michael Smith committed
61
#include "format.h"
62
#include "format_mp3.h"
Michael Smith's avatar
Michael Smith committed
63
#include "event.h"
64
#include "admin.h"
Michael Smith's avatar
Michael Smith committed
65
#include "auth.h"
Jack Moffitt's avatar
Jack Moffitt committed
66
67
68

#define CATMODULE "connection"

69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
/* 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

86
87
88
89
90
typedef struct client_queue_tag {
    client_t *client;
    int offset;
    int stream_offset;
    int shoutcast;
91
    char *shoutcast_mount;
92
93
    struct client_queue_tag *next;
} client_queue_t;
Jack Moffitt's avatar
Jack Moffitt committed
94
95

typedef struct _thread_queue_tag {
96
97
    thread_type *thread_id;
    struct _thread_queue_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
98
99
} thread_queue_t;

100
101
102
103
104
105
106
107
typedef struct
{
    char *filename;
    time_t file_recheck;
    time_t file_mtime;
    avl_tree *contents;
} cache_file_contents;

108
static spin_t _connection_lock;
109
static volatile unsigned long _current_id = 0;
Jack Moffitt's avatar
Jack Moffitt committed
110
111
static int _initialized = 0;

112
113
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;
114
115
116
117
118
static int ssl_ok;
#ifdef HAVE_OPENSSL
static SSL_CTX *ssl_ctx;
#endif

119
120
121
/* filtering client connection based on IP */
cache_file_contents banned_ip, allowed_ip;

122
rwlock_t _source_shutdown_rwlock;
Jack Moffitt's avatar
Jack Moffitt committed
123

124
static void _handle_connection(void);
Jack Moffitt's avatar
Jack Moffitt committed
125

126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
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
142
143
void connection_initialize(void)
{
144
145
    if (_initialized) return;
    
146
    thread_spin_create (&_connection_lock);
147
    thread_mutex_create(&move_clients_mutex);
148
    thread_rwlock_create(&_source_shutdown_rwlock);
149
    thread_cond_create(&global.shutdown_cond);
150
151
152
153
    _req_queue = NULL;
    _req_queue_tail = &_req_queue;
    _con_queue = NULL;
    _con_queue_tail = &_con_queue;
Jack Moffitt's avatar
Jack Moffitt committed
154

155
156
157
158
159
160
    banned_ip.contents = NULL;
    banned_ip.file_mtime = 0;

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

161
    _initialized = 1;
Jack Moffitt's avatar
Jack Moffitt committed
162
163
164
165
}

void connection_shutdown(void)
{
166
167
    if (!_initialized) return;
    
168
169
170
#ifdef HAVE_OPENSSL
    SSL_CTX_free (ssl_ctx);
#endif
171
172
173
    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);
 
174
    thread_cond_destroy(&global.shutdown_cond);
175
    thread_rwlock_destroy(&_source_shutdown_rwlock);
176
    thread_spin_destroy (&_connection_lock);
177
    thread_mutex_destroy(&move_clients_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
178

179
    _initialized = 0;
Jack Moffitt's avatar
Jack Moffitt committed
180
181
182
183
}

static unsigned long _next_connection_id(void)
{
184
    unsigned long id;
Jack Moffitt's avatar
Jack Moffitt committed
185

186
    thread_spin_lock (&_connection_lock);
187
    id = _current_id++;
188
    thread_spin_unlock (&_connection_lock);
Jack Moffitt's avatar
Jack Moffitt committed
189

190
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
191
192
}

193
194

#ifdef HAVE_OPENSSL
195
static void get_ssl_certificate (ice_config_t *config)
196
197
{
    SSL_METHOD *method;
198
    long ssl_opts;
199
200
201
202
203
204
205
    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);
206
207
    ssl_opts = SSL_CTX_get_options (ssl_ctx);
    SSL_CTX_set_options (ssl_ctx, ssl_opts|SSL_OP_NO_SSLv2);
208
209
210
211
212

    do
    {
        if (config->cert_file == NULL)
            break;
213
        if (SSL_CTX_use_certificate_chain_file (ssl_ctx, config->cert_file) <= 0)
214
215
216
217
218
219
220
221
222
223
224
        {
            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))
        {
225
            ERROR1 ("Invalid %s - Private key does not match cert public key", config->cert_file);
226
227
            break;
        }
228
229
230
231
        if (SSL_CTX_set_cipher_list(ssl_ctx, config->cipher_list) <= 0) 
        { 
            WARN1 ("Invalid cipher list: %s", config->cipher_list); 
        } 
232
233
        ssl_ok = 1;
        INFO1 ("SSL certificate found at %s", config->cert_file);
234
        INFO1 ("SSL using ciphers %s", config->cipher_list); 
235
        return;
236
    } while (0);
237
    INFO0 ("No SSL capability on any configured ports");
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
272
273
274
275
276
277
278
279
280
281
}


/* 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 */
282
static void get_ssl_certificate (ice_config_t *config)
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
{
    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;
}


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
402
403
404
405
406
407
408
409
410
411
/* 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;
}


412
413
connection_t *connection_create (sock_t sock, sock_t serversock, char *ip)
{
414
    connection_t *con;
415
416
417
418
419
420
421
422
    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;
423
424
        con->read = connection_read;
        con->send = connection_send;
425
    }
Michael Smith's avatar
Michael Smith committed
426

427
    return con;
428
429
}

430
431
432
433
434
435
436
437
438
439
440
441
442
/* 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
}

443
static sock_t wait_for_serversock(int timeout)
444
445
{
#ifdef HAVE_POLL
446
    struct pollfd ufds [global.server_sockets];
447
448
449
450
451
452
453
454
455
456
    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) {
457
        return SOCK_ERROR;
458
459
    }
    else if(ret == 0) {
460
        return SOCK_ERROR;
461
462
    }
    else {
463
        int dst;
464
        for(i=0; i < global.server_sockets; i++) {
465
            if(ufds[i].revents & POLLIN)
466
                return ufds[i].fd;
467
468
469
470
            if(ufds[i].revents & (POLLHUP|POLLERR|POLLNVAL))
            {
                if (ufds[i].revents & (POLLHUP|POLLERR))
                {
471
                    sock_close (global.serversock[i]);
472
473
                    WARN0("Had to close a listening socket");
                }
474
                global.serversock[i] = SOCK_ERROR;
475
            }
476
        }
477
478
479
        /* remove any closed sockets */
        for(i=0, dst=0; i < global.server_sockets; i++)
        {
480
            if (global.serversock[i] == SOCK_ERROR)
481
482
483
484
485
486
                continue;
            if (i!=dst)
                global.serversock[dst] = global.serversock[i];
            dst++;
        }
        global.server_sockets = dst;
487
        return SOCK_ERROR;
488
489
490
491
492
    }
#else
    fd_set rfds;
    struct timeval tv, *p=NULL;
    int i, ret;
493
    sock_t max = SOCK_ERROR;
494
495
496
497
498

    FD_ZERO(&rfds);

    for(i=0; i < global.server_sockets; i++) {
        FD_SET(global.serversock[i], &rfds);
499
        if (max == SOCK_ERROR || global.serversock[i] > max)
500
501
502
503
504
            max = global.serversock[i];
    }

    if(timeout >= 0) {
        tv.tv_sec = timeout/1000;
505
        tv.tv_usec = (timeout % 1000) * 1000;
506
507
508
509
510
        p = &tv;
    }

    ret = select(max+1, &rfds, NULL, NULL, p);
    if(ret < 0) {
511
        return SOCK_ERROR;
512
513
    }
    else if(ret == 0) {
514
        return SOCK_ERROR;
515
516
517
518
519
520
    }
    else {
        for(i=0; i < global.server_sockets; i++) {
            if(FD_ISSET(global.serversock[i], &rfds))
                return global.serversock[i];
        }
521
        return SOCK_ERROR; /* Should be impossible, stop compiler warnings */
522
523
524
525
    }
#endif
}

526
static connection_t *_accept_connection(int duration)
Jack Moffitt's avatar
Jack Moffitt committed
527
{
528
    sock_t sock, serversock;
529
    char *ip;
Jack Moffitt's avatar
Jack Moffitt committed
530

531
    serversock = wait_for_serversock (duration);
532
    if (serversock == SOCK_ERROR)
533
        return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
534

535
536
    /* malloc enough room for a full IP address (including ipv6) */
    ip = (char *)malloc(MAX_ADDR_LEN);
Jack Moffitt's avatar
Jack Moffitt committed
537

538
    sock = sock_accept(serversock, ip, MAX_ADDR_LEN);
539
    if (sock != SOCK_ERROR)
540
    {
541
        connection_t *con = NULL;
542
543
544
        /* 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
545

546
547
        if (accept_ip_address (ip))
            con = connection_create (sock, serversock, ip);
548
549
550
551
552
553
554
555
556
557
558
        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);
        }
559
560
561
    }
    free(ip);
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
562
563
564
}


565
566
567
568
569
/* 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
570
{
571
572
    *_con_queue_tail = node;
    _con_queue_tail = (volatile client_queue_t **)&node->next;
Jack Moffitt's avatar
Jack Moffitt committed
573
574
575
}


576
577
578
579
580
581
/* 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
582

583
584
585
586
587
588
589
    /* 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;
590
        node->next = NULL;
591
    }
592
593
    return node;
}
Jack Moffitt's avatar
Jack Moffitt committed
594
595


596
/* run along queue checking for any data that has come in or a timeout */
597
static void process_request_queue (void)
598
599
600
601
602
{
    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
603

604
605
606
607
608
609
    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
610

611
612
613
614
615
616
617
        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
618

619
620
621
622
623
        if (len > 0)
        {
            int pass_it = 1;
            char *ptr;

624
625
            /* handle \n, \r\n and nsvcap which for some strange reason has
             * EOL as \r\r\n */
626
627
628
629
630
631
632
            node->offset += len;
            client->refbuf->data [node->offset] = '\000';
            do
            {
                if (node->shoutcast == 1)
                {
                    /* password line */
633
634
                    if (strstr (client->refbuf->data, "\r\r\n") != NULL)
                        break;
635
636
637
638
639
640
641
                    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 */
642
643
644
645
646
647
                ptr = strstr (client->refbuf->data, "\r\r\n\r\r\n");
                if (ptr)
                {
                    node->stream_offset = (ptr+6) - client->refbuf->data;
                    break;
                }
648
649
650
651
652
653
654
655
656
657
658
659
660
661
                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
662

663
664
665
666
667
668
669
            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);
670
                continue;
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
            }
        }
        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;
686
    }
687
    _handle_connection();
Jack Moffitt's avatar
Jack Moffitt committed
688
689
}

690

691
692
693
694
695
696
697
/* 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
698
699
}

700

701
void connection_accept_loop (void)
Jack Moffitt's avatar
Jack Moffitt committed
702
{
703
    connection_t *con;
704
    ice_config_t *config;
705
    int duration = 300;
706
707
708
709

    config = config_get_config ();
    get_ssl_certificate (config);
    config_release_config ();
Jack Moffitt's avatar
Jack Moffitt committed
710

711
712
    while (global.running == ICE_RUNNING)
    {
713
        con = _accept_connection (duration);
714
715

        if (con)
716
        {
717
718
719
            client_queue_t *node;
            ice_config_t *config;
            client_t *client = NULL;
720
            listener_t *listener;
721

722
723
724
725
            global_lock();
            if (client_create (&client, con, NULL) < 0)
            {
                global_unlock();
726
                client_send_403 (client, "Icecast connection limit reached");
727
728
                /* don't be too eager as this is an imposed hard limit */
                thread_sleep (400000);
729
730
                continue;
            }
731

732
733
734
            /* setup client for reading incoming http */
            client->refbuf->data [PER_CLIENT_REFBUF_SIZE-1] = '\000';

735
736
            if (sock_set_blocking (client->con->sock, 0) || sock_set_nodelay (client->con->sock))
            {
737
                global_unlock();
738
739
740
741
742
                WARN0 ("failed to set tcp options on client connection, dropping");
                client_destroy (client);
                continue;
            }

743
744
745
            node = calloc (1, sizeof (client_queue_t));
            if (node == NULL)
            {
746
                global_unlock();
747
748
749
750
751
752
                client_destroy (client);
                continue;
            }
            node->client = client;

            config = config_get_config();
753
754
755
            listener = config_get_listen_sock (config, client->con);

            if (listener)
756
            {
757
758
759
760
                if (listener->shoutcast_compat)
                    node->shoutcast = 1;
                if (listener->ssl && ssl_ok)
                    connection_uses_ssl (client->con);
761
762
                if (listener->shoutcast_mount)
                    node->shoutcast_mount = strdup (listener->shoutcast_mount);
763
            }
764
            global_unlock();
765
            config_release_config();
766
767
768

            _add_request_queue (node);
            stats_event_inc (NULL, "connections");
769
770
771
772
773
774
            duration = 5;
        }
        else
        {
            if (_req_queue == NULL)
                duration = 300; /* use longer timeouts when nothing waiting */
775
        }
776
        process_request_queue ();
777
    }
Jack Moffitt's avatar
Jack Moffitt committed
778

779
780
781
    /* Give all the other threads notification to shut down */
    thread_cond_broadcast(&global.shutdown_cond);

782
783
784
    /* 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
785
786
}

787
788
789

/* Called when activating a source. Verifies that the source count is not
 * exceeded and applies any initial parameters.
790
 */
791
int connection_complete_source (source_t *source, int response)
792
{
793
    ice_config_t *config;
794
795
796
797

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

798
    config = config_get_config();
799
800
    if (global.sources < config->source_limit)
    {
801
        const char *contenttype;
802
        mount_proxy *mountinfo;
803
804
805
806
807
808
809
810
811
812
813
        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();
814
                global_unlock();
815
816
                if (response)
                {
817
                    client_send_403 (source->client, "Content-type not supported");
818
819
                    source->client = NULL;
                }
820
821
822
823
824
825
                WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
                return -1;
            }
        }
        else
        {
826
            WARN0("No content-type header, falling back to backwards compatibility mode "
827
                    "for icecast 1.x relays. Assuming content is mp3.");
828
            format_type = FORMAT_TYPE_GENERIC;
829
830
        }

Karl Heyes's avatar
Karl Heyes committed
831
        if (format_get_plugin (format_type, source) < 0)
832
833
834
        {
            global_unlock();
            config_release_config();
835
836
            if (response)
            {
837
                client_send_403 (source->client, "internal format allocation problem");
838
839
                source->client = NULL;
            }
840
841
842
843
            WARN1 ("plugin format failed for \"%s\"", source->mount);
            return -1;
        }

844
845
846
        global.sources++;
        stats_event_args (NULL, "sources", "%d", global.sources);
        global_unlock();
847

848
849
        source->running = 1;
        mountinfo = config_find_mount (config, source->mount);
850
        source_update_settings (config, source, mountinfo);
851
        config_release_config();
852
        slave_rebuild_mounts();
853
854
855
856
857
858

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

        return 0;
    }
859
    WARN1("Request to add source when maximum source limit "
860
861
862
863
864
            "reached %d", global.sources);

    global_unlock();
    config_release_config();

865
866
    if (response)
    {
867
        client_send_403 (source->client, "too many sources connected");
868
869
        source->client = NULL;
    }
870
871
872
873
874

    return -1;
}


875
static int _check_pass_http(http_parser_t *parser, 
876
        const char *correctuser, const char *correctpass)
877
878
{
    /* This will look something like "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==" */
879
    const char *header = httpp_getvar(parser, "authorization");
880
881
882
883
884
885
886
887
888
889
    char *userpass, *tmp;
    char *username, *password;

    if(header == NULL)
        return 0;

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

    userpass = util_base64_decode(header+6);
890
891
892
    if(userpass == NULL) {
        WARN1("Base64 decode of Authorization header \"%s\" failed",
                header+6);
893
        return 0;
894
    }
895
896
897
898
899
900
901
902
903
904

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

905
    if(strcmp(username, correctuser) || strcmp(password, correctpass)) {
906
907
908
        free(userpass);
        return 0;
    }
909
    free(userpass);
910
911
912
913

    return 1;
}

914
static int _check_pass_icy(http_parser_t *parser, const char *correctpass)
915
{
916
    const char *password;
917
918
919
920
921

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

922
    if (strcmp(password, correctpass))
923
924
925
926
927
        return 0;
    else
        return 1;
}

928
static int _check_pass_ice(http_parser_t *parser, const char *correctpass)
929
{
930
    const char *password;
931
932
933
934
935

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

936
    if (strcmp(password, correctpass))
937
938
939
940
941
        return 0;
    else
        return 1;
}

942
int connection_check_admin_pass(http_parser_t *parser)
943
{
944
    int ret;
Michael Smith's avatar
Michael Smith committed
945
946
947
    ice_config_t *config = config_get_config();
    char *pass = config->admin_password;
    char *user = config->admin_username;
948
    const char *protocol;
949
950
951
952
953
954

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

955
956
957
958
959
    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
960
    config_release_config();
961
962
    return ret;
}
Michael Smith's avatar
Michael Smith committed
963

964
965
966
967
968
int connection_check_relay_pass(http_parser_t *parser)
{
    int ret;
    ice_config_t *config = config_get_config();
    char *pass = config->relay_password;
969
    char *user = config->relay_username;
Michael Smith's avatar
Michael Smith committed
970

971
972
    if(!pass || !user) {
        config_release_config();
973
        return 0;
974
    }
975

976
977
978
    ret = _check_pass_http(parser, user, pass);
    config_release_config();
    return ret;
979
980
}

981
982
983
984

/* return 0 for failed, 1 for ok
 */
int connection_check_pass (http_parser_t *parser, const char *user, const char *pass)
985
{
986
    int ret;
987
    const char *protocol;
Michael Smith's avatar
Michael Smith committed
988

989
990
    if(!pass) {
        WARN0("No source password set, rejecting source");
991
        return -1;
992
993
    }

994
    protocol = httpp_getvar(parser, HTTPP_VAR_PROTOCOL);
995
996
997
998
999
    if(protocol != NULL && !strcmp(protocol, "ICY")) {
        ret = _check_pass_icy(parser, pass);
    }
    else {
        ret = _check_pass_http(parser, user, pass);
1000
        if (!ret)
1001
        {
1002
1003
1004
1005
1006
1007
1008
            ice_config_t *config = config_get_config_unlocked();
            if (config->ice_login)
            {
                ret = _check_pass_ice(parser, pass);
                if(ret)
                    WARN0("Source is using deprecated icecast login");
            }
1009
        }
1010
1011
    }
    return ret;
1012
1013
}

1014

1015
1016
/* only called for native icecast source clients */
static void _handle_source_request (client_t *client, const char *uri)
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
1027
1028
1029
1030
1031
1032
1033
1034
1035
    switch (client_check_source_auth (client, uri))
    {
        case 0: /* authenticated from config file */
            source_startup (client, uri, ICECAST_SOURCE_AUTH);
            break;

        case 1: /* auth pending */
            break;

        default: /* failed */
1036
            INFO1("Source (%s) attempted to login with invalid or missing password", uri);
1037
            client_send_401(client);
1038
            break;
1039
    }
1040
1041
1042
1043
1044
1045
}


void source_startup (client_t *client, const char *uri, int auth_style)
{
    source_t *source;
1046
    source = source_reserve (uri);
1047

1048
1049
1050
    if (source)
    {
        source->client = client;
1051
1052
        source->parser = client->parser;
        source->con = client->con;
1053
        if (connection_complete_source (source, 1) < 0)
1054
        {
1055
            source_clear_source (source);
1056
            source_free_source (source);
1057
1058
1059
1060
1061
1062
1063
            return;
        }
        client->respcode = 200;
        if (auth_style == SHOUTCAST_SOURCE_AUTH)
        {
            source->shoutcast_compat = 1;
            source_client_callback (client, source);
1064
1065
        }
        else
1066
        {
1067
            refbuf_t *ok = refbuf_new (PER_CLIENT_REFBUF_SIZE);
1068
            client->respcode = 200;
1069
            snprintf (ok->data, PER_CLIENT_REFBUF_SIZE,
1070
                    "HTTP/1.0 200 OK\r\n\r\n");
1071
1072
1073
1074
            ok->len = strlen (ok->data);
            /* we may have unprocessed data read in, so don't overwrite it */
            ok->associated = client->refbuf;
            client->refbuf = ok;
1075
1076
            fserve_add_client_callback (client, source_client_callback, source);
        }
1077
1078
1079
    }
    else
    {
1080
        client_send_403 (client, "Mountpoint in use");
1081
        WARN1 ("Mountpoint %s in use", uri);
1082
    }
1083
1084
}

1085

1086
static void _handle_stats_request (client_t *client, char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
1087
{
1088
    stats_event_inc(NULL, "stats_connections");
1089
1090
1091
1092

    if (connection_check_admin_pass (client->parser) == 0)
    {
        client_send_401 (client);
1093
1094
        ERROR0("Bad password for stats connection");
        return;
1095
    }
1096

1097
    client->respcode = 200;
1098
1099
1100
1101
    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);
1102
1103
}

1104
static void _handle_get_request (client_t *client, char *passed_uri)
1105
{
Michael Smith's avatar
Michael Smith committed
1106
    int port;
Karl Heyes's avatar
Karl Heyes committed
1107
1108
    char *serverhost = NULL;
    int serverport = 0;
1109
    aliases *alias;
Michael Smith's avatar
Michael Smith committed
1110
    ice_config_t *config;
1111
    char *uri = passed_uri;
1112
    listener_t *listen_sock;
Michael Smith's avatar
Michael Smith committed
1113
1114
1115

    config = config_get_config();
    port = config->port;
1116
1117
1118
1119
1120
1121

    listen_sock = config_get_listen_sock (config, client->con);
    if (listen_sock)
    {
        serverhost = listen_sock->bind_address;
        serverport = listen_sock->port;
1122
1123
    }
    alias = config->aliases;
1124

1125
1126
1127
    /* 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
1128
    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
1129
    ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
1130
1131
1132
1133
    ** we need to handle the latter two before the former, as the latter two
    ** aren't subject to the limits.
    */
    /* TODO: add GUID-xxxxxx */
1134

1135
1136
1137
    /* 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))) {
1138
1139
            uri = strdup (alias->destination);
            DEBUG2 ("alias has made %s into %s", passed_uri, uri);