connection.c 53.3 KB
Newer Older
1
2
3
4
5
/* Icecast
 *
 * This program is distributed under the GNU General Public License, version 2.
 * A copy of this license is included with this source.
 *
6
 * Copyright 2000-2004, Jack Moffitt <jack@xiph.org,
7
8
9
10
 *                      Michael Smith <msmith@xiph.org>,
 *                      oddsock <oddsock@xiph.org>,
 *                      Karl Heyes <karl@xiph.org>
 *                      and others (see AUTHORS for details).
Philipp Schafft's avatar
Philipp Schafft committed
11
 * Copyright 2011,      Dave 'justdave' Miller <justdave@mozilla.com>,
12
 * Copyright 2011-2018, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
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
#include <sys/types.h>
28
29

#ifndef _WIN32
Jack Moffitt's avatar
Jack Moffitt committed
30
31
#include <sys/socket.h>
#include <netinet/in.h>
32
#else
33
#include <winsock2.h>
34
#endif
Jack Moffitt's avatar
Jack Moffitt committed
35

Marvin Scholz's avatar
Marvin Scholz committed
36
37
38
39
#include "common/thread/thread.h"
#include "common/avl/avl.h"
#include "common/net/sock.h"
#include "common/httpp/httpp.h"
Jack Moffitt's avatar
Jack Moffitt committed
40

41
42
#include "compat.h"
#include "connection.h"
43
#include "cfgfile.h"
Jack Moffitt's avatar
Jack Moffitt committed
44
45
#include "global.h"
#include "util.h"
46
#include "refobject.h"
Jack Moffitt's avatar
Jack Moffitt committed
47
48
#include "refbuf.h"
#include "client.h"
49
#include "errors.h"
Jack Moffitt's avatar
Jack Moffitt committed
50
51
#include "stats.h"
#include "logging.h"
52
#include "fserve.h"
53
#include "slave.h"
54

Jack Moffitt's avatar
Jack Moffitt committed
55
#include "source.h"
56
#include "admin.h"
Michael Smith's avatar
Michael Smith committed
57
#include "auth.h"
58
#include "matchfile.h"
59
#include "tls.h"
60
#include "acl.h"
61
62
#include "refobject.h"
#include "listensocket.h"
Jack Moffitt's avatar
Jack Moffitt committed
63
64
65

#define CATMODULE "connection"

66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
/* 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.
*/

81
82
83
84
typedef struct client_queue_tag {
    client_t *client;
    int offset;
    int shoutcast;
85
    char *shoutcast_mount;
86
87
    char *bodybuffer;
    size_t bodybufferlen;
88
    int tried_body;
89
90
    struct client_queue_tag *next;
} client_queue_t;
Jack Moffitt's avatar
Jack Moffitt committed
91

92
static spin_t _connection_lock; // protects _current_id, _con_queue, _con_queue_tail
93
static volatile connection_id_t _current_id = 0;
Jack Moffitt's avatar
Jack Moffitt committed
94
95
static int _initialized = 0;

96
97
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;
98
static volatile client_queue_t *_body_queue = NULL, **_body_queue_tail = &_body_queue;
99
static int tls_ok;
100
static tls_ctx_t *tls_ctx;
101

102
/* filtering client connection based on IP */
103
static matchfile_t *banned_ip, *allowed_ip;
104

105
rwlock_t _source_shutdown_rwlock;
Jack Moffitt's avatar
Jack Moffitt committed
106

107
static void _handle_connection(void);
108
static void get_tls_certificate(ice_config_t *config);
Jack Moffitt's avatar
Jack Moffitt committed
109
110
111

void connection_initialize(void)
{
Marvin Scholz's avatar
Marvin Scholz committed
112
113
    if (_initialized)
        return;
114

115
    thread_spin_create (&_connection_lock);
116
    thread_mutex_create(&move_clients_mutex);
117
    thread_rwlock_create(&_source_shutdown_rwlock);
118
    thread_cond_create(&global.shutdown_cond);
119
120
121
122
    _req_queue = NULL;
    _req_queue_tail = &_req_queue;
    _con_queue = NULL;
    _con_queue_tail = &_con_queue;
123
124
    _body_queue = NULL;
    _body_queue_tail = &_body_queue;
Jack Moffitt's avatar
Jack Moffitt committed
125

126
    _initialized = 1;
Jack Moffitt's avatar
Jack Moffitt committed
127
128
129
130
}

void connection_shutdown(void)
{
Marvin Scholz's avatar
Marvin Scholz committed
131
132
    if (!_initialized)
        return;
133

134
    tls_ctx_unref(tls_ctx);
135
136
137
    matchfile_release(banned_ip);
    matchfile_release(allowed_ip);
 
138
    thread_cond_destroy(&global.shutdown_cond);
139
    thread_rwlock_destroy(&_source_shutdown_rwlock);
140
    thread_spin_destroy (&_connection_lock);
141
    thread_mutex_destroy(&move_clients_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
142

143
    _initialized = 0;
Jack Moffitt's avatar
Jack Moffitt committed
144
145
}

146
void connection_reread_config(ice_config_t *config)
147
{
148
    get_tls_certificate(config);
149
    listensocket_container_configure_and_setup(global.listensockets, config);
150
151
}

152
static connection_id_t _next_connection_id(void)
Jack Moffitt's avatar
Jack Moffitt committed
153
{
154
    connection_id_t id;
Jack Moffitt's avatar
Jack Moffitt committed
155

156
    thread_spin_lock(&_connection_lock);
157
    id = _current_id++;
158
    thread_spin_unlock(&_connection_lock);
Jack Moffitt's avatar
Jack Moffitt committed
159

160
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
161
162
}

163

164
#ifdef ICECAST_CAP_TLS
165
static void get_tls_certificate(ice_config_t *config)
166
{
167
168
    const char *keyfile;

169
    config->tls_ok = tls_ok = 0;
170

171
172
173
174
    keyfile = config->tls_context.key_file;
    if (!keyfile)
        keyfile = config->tls_context.cert_file;

175
    tls_ctx_unref(tls_ctx);
176
    tls_ctx = tls_ctx_new(config->tls_context.cert_file, keyfile, config->tls_context.cipher_list);
177
178
    if (!tls_ctx) {
        ICECAST_LOG_INFO("No TLS capability on any configured ports");
179
        return;
180
181
    }

182
    config->tls_ok = tls_ok = 1;
183
184
185
}


186
/* handlers for reading and writing a connection_t when there is TLS
187
188
 * configured on the listening port
 */
189
static int connection_read_tls(connection_t *con, void *buf, size_t len)
190
{
191
    ssize_t bytes = tls_read(con->tls, buf, len);
192

Marvin Scholz's avatar
Marvin Scholz committed
193
    if (bytes < 0) {
194
        if (tls_want_io(con->tls) > 0)
195
            return -1;
196
197
198
199
200
        con->error = 1;
    }
    return bytes;
}

201
static int connection_send_tls(connection_t *con, const void *buf, size_t len)
202
{
203
    ssize_t bytes = tls_write(con->tls, buf, len);
204

Marvin Scholz's avatar
Marvin Scholz committed
205
    if (bytes < 0) {
206
207
        if (tls_want_io(con->tls) > 0)
            return -1;
208
        con->error = 1;
Marvin Scholz's avatar
Marvin Scholz committed
209
    } else {
210
        con->sent_bytes += bytes;
Marvin Scholz's avatar
Marvin Scholz committed
211
    }
212
213
214
215
    return bytes;
}
#else

216
217
/* TLS not compiled in, so at least log it */
static void get_tls_certificate(ice_config_t *config)
218
{
219
    tls_ok = 0;
220
    ICECAST_LOG_INFO("No TLS capability. "
Philipp Schafft's avatar
Philipp Schafft committed
221
                     "Rebuild Icecast with OpenSSL support to enable this.");
222
}
223
#endif /* ICECAST_CAP_TLS */
224
225
226
227
228


/* handlers (default) for reading and writing a connection_t, no encrpytion
 * used just straight access to the socket
 */
Marvin Scholz's avatar
Marvin Scholz committed
229
static int connection_read(connection_t *con, void *buf, size_t len)
230
{
Marvin Scholz's avatar
Marvin Scholz committed
231
    int bytes = sock_read_bytes(con->sock, buf, len);
232
233
    if (bytes == 0)
        con->error = 1;
Marvin Scholz's avatar
Marvin Scholz committed
234
    if (bytes == -1 && !sock_recoverable(sock_error()))
235
236
237
238
        con->error = 1;
    return bytes;
}

Marvin Scholz's avatar
Marvin Scholz committed
239
static int connection_send(connection_t *con, const void *buf, size_t len)
240
{
Marvin Scholz's avatar
Marvin Scholz committed
241
242
243
    int bytes = sock_write_bytes(con->sock, buf, len);
    if (bytes < 0) {
        if (!sock_recoverable(sock_error()))
244
            con->error = 1;
Marvin Scholz's avatar
Marvin Scholz committed
245
    } else {
246
        con->sent_bytes += bytes;
Marvin Scholz's avatar
Marvin Scholz committed
247
    }
248
249
250
    return bytes;
}

251
connection_t *connection_create(sock_t sock, listensocket_t *listensocket_real, listensocket_t* listensocket_effective, char *ip)
252
{
253
    connection_t *con;
254
255
256
257

    if (!matchfile_match_allow_deny(allowed_ip, banned_ip, ip))
        return NULL;

258
    con = (connection_t *)calloc(1, sizeof(connection_t));
Marvin Scholz's avatar
Marvin Scholz committed
259
    if (con) {
260
261
262
        refobject_ref(listensocket_real);
        refobject_ref(listensocket_effective);

Marvin Scholz's avatar
Marvin Scholz committed
263
        con->sock       = sock;
264
265
        con->listensocket_real = listensocket_real;
        con->listensocket_effective = listensocket_effective;
Marvin Scholz's avatar
Marvin Scholz committed
266
267
268
        con->con_time   = time(NULL);
        con->id         = _next_connection_id();
        con->ip         = ip;
269
        con->tlsmode    = ICECAST_TLSMODE_AUTO;
Marvin Scholz's avatar
Marvin Scholz committed
270
271
        con->read       = connection_read;
        con->send       = connection_send;
272
    }
Michael Smith's avatar
Michael Smith committed
273

274
    return con;
275
276
}

277
/* prepare connection for interacting over a TLS connection
278
 */
279
void connection_uses_tls(connection_t *con)
280
{
281
#ifdef ICECAST_CAP_TLS
282
    if (con->tls)
283
284
        return;

285
286
287
288
289
290
    if (con->readbufferlen) {
        ICECAST_LOG_ERROR("Connection is now using TLS but has data put back. BAD. Discarding putback data.");
        free(con->readbuffer);
        con->readbufferlen = 0;
    }

291
    con->tlsmode = ICECAST_TLSMODE_RFC2818;
292
293
    con->read = connection_read_tls;
    con->send = connection_send_tls;
294
295
296
    con->tls = tls_new(tls_ctx);
    tls_set_incoming(con->tls);
    tls_set_socket(con->tls, con->sock);
297
298
299
#endif
}

300
301
302
303
304
ssize_t connection_send_bytes(connection_t *con, const void *buf, size_t len)
{
    return con->send(con, buf, len);
}

305
306
ssize_t connection_read_bytes(connection_t *con, void *buf, size_t len)
{
307
308
309
310
311
312
313
314
    ssize_t done = 0;
    ssize_t ret;

    if (con->readbufferlen) {
        ICECAST_LOG_DEBUG("On connection %p we read from putback buffer, filled with %zu bytes, requested are %zu bytes", con, con->readbufferlen, len);
        if (len >= con->readbufferlen) {
            memcpy(buf, con->readbuffer, con->readbufferlen);
            free(con->readbuffer);
315
            con->readbuffer = NULL;
316
            ICECAST_LOG_DEBUG("New fill in buffer=<empty>");
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
            if (len == con->readbufferlen) {
                con->readbufferlen = 0;
                return len;
            } else {
                len -= con->readbufferlen;
                buf += con->readbufferlen;
                done = con->readbufferlen;
                con->readbufferlen = 0;
            }
        } else {
            memcpy(buf, con->readbuffer, len);
            memmove(con->readbuffer, con->readbuffer+len, con->readbufferlen-len);
            con->readbufferlen -= len;
            return len;
        }
    }

    ret = con->read(con, buf, len);

    if (ret < 0) {
        if (done == 0) {
            return ret;
        } else {
            return done;
        }
    }

    return done + ret;
}

int connection_read_put_back(connection_t *con, const void *buf, size_t len)
{
    void *n;

    if (con->readbufferlen) {
        n = realloc(con->readbuffer, con->readbufferlen + len);
        if (!n)
            return -1;

        memcpy(n + con->readbufferlen, buf, len);
        con->readbuffer = n;
        con->readbufferlen += len;

        ICECAST_LOG_DEBUG("On connection %p %zu bytes have been put back.", con, len);
        return 0;
    } else {
        n = malloc(len);
        if (!n)
            return -1;

        memcpy(n, buf, len);
        con->readbuffer = n;
        con->readbufferlen = len;
        ICECAST_LOG_DEBUG("On connection %p %zu bytes have been put back.", con, len);
        return 0;
    }
373
374
}

375
376
377
378
/* 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
 */
379
static void _add_connection(client_queue_t *node)
Jack Moffitt's avatar
Jack Moffitt committed
380
{
381
    thread_spin_lock(&_connection_lock);
382
    *_con_queue_tail = node;
383
384
    _con_queue_tail = (volatile client_queue_t **) &node->next;
    thread_spin_unlock(&_connection_lock);
Jack Moffitt's avatar
Jack Moffitt committed
385
386
387
}


388
389
390
391
392
393
/* 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
394

Marvin Scholz's avatar
Marvin Scholz committed
395
    thread_spin_lock(&_connection_lock);
396

Marvin Scholz's avatar
Marvin Scholz committed
397
    if (_con_queue){
398
399
400
401
        node = (client_queue_t *)_con_queue;
        _con_queue = node->next;
        if (_con_queue == NULL)
            _con_queue_tail = &_con_queue;
402
        node->next = NULL;
403
    }
404

Marvin Scholz's avatar
Marvin Scholz committed
405
    thread_spin_unlock(&_connection_lock);
406
407
    return node;
}
Jack Moffitt's avatar
Jack Moffitt committed
408
409


410
/* run along queue checking for any data that has come in or a timeout */
411
static void process_request_queue (void)
412
413
{
    client_queue_t **node_ref = (client_queue_t **)&_req_queue;
414
415
416
417
418
419
    ice_config_t *config;
    int timeout;
    char peak;

    config = config_get_config();
    timeout = config->header_timeout;
420
    config_release_config();
Jack Moffitt's avatar
Jack Moffitt committed
421

Marvin Scholz's avatar
Marvin Scholz committed
422
    while (*node_ref) {
423
424
425
426
        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
427

428
        if (client->con->tlsmode == ICECAST_TLSMODE_AUTO || client->con->tlsmode == ICECAST_TLSMODE_AUTO_NO_PLAIN) {
429
430
            if (recv(client->con->sock, &peak, 1, MSG_PEEK) == 1) {
                if (peak == 0x16) { /* TLS Record Protocol Content type 0x16 == Handshake */
431
                    connection_uses_tls(client->con);
432
433
434
435
                }
            }
        }

Marvin Scholz's avatar
Marvin Scholz committed
436
437
        if (len > 0) {
            if (client->con->con_time + timeout <= time(NULL)) {
438
                len = 0;
Marvin Scholz's avatar
Marvin Scholz committed
439
440
441
            } else {
                len = client_read_bytes(client, buf, len);
            }
442
        }
Jack Moffitt's avatar
Jack Moffitt committed
443

Marvin Scholz's avatar
Marvin Scholz committed
444
        if (len > 0) {
445
            ssize_t stream_offset = -1;
446
447
448
            int pass_it = 1;
            char *ptr;

449
450
            /* handle \n, \r\n and nsvcap which for some strange reason has
             * EOL as \r\r\n */
451
            node->offset += len;
Marvin Scholz's avatar
Marvin Scholz committed
452
453
454
            client->refbuf->data[node->offset] = '\000';
            do {
                if (node->shoutcast == 1) {
455
                    /* password line */
456
457
                    if (strstr (client->refbuf->data, "\r\r\n") != NULL)
                        break;
458
459
460
461
462
463
464
                    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 */
Marvin Scholz's avatar
Marvin Scholz committed
465
466
                ptr = strstr(client->refbuf->data, "\r\r\n\r\r\n");
                if (ptr) {
467
                    stream_offset = (ptr+6) - client->refbuf->data;
468
469
                    break;
                }
Marvin Scholz's avatar
Marvin Scholz committed
470
471
                ptr = strstr(client->refbuf->data, "\r\n\r\n");
                if (ptr) {
472
                    stream_offset = (ptr+4) - client->refbuf->data;
473
474
                    break;
                }
Marvin Scholz's avatar
Marvin Scholz committed
475
476
                ptr = strstr(client->refbuf->data, "\n\n");
                if (ptr) {
477
                    stream_offset = (ptr+2) - client->refbuf->data;
478
479
480
481
                    break;
                }
                pass_it = 0;
            } while (0);
Jack Moffitt's avatar
Jack Moffitt committed
482

Marvin Scholz's avatar
Marvin Scholz committed
483
            if (pass_it) {
484
485
486
487
                if (stream_offset != -1) {
                    connection_read_put_back(client->con, client->refbuf->data + stream_offset, node->offset - stream_offset);
                    node->offset = stream_offset;
                }
488
489
490
491
                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;
Marvin Scholz's avatar
Marvin Scholz committed
492
                _add_connection(node);
493
                continue;
494
            }
Marvin Scholz's avatar
Marvin Scholz committed
495
496
        } else {
            if (len == 0 || client->con->error) {
497
498
499
                if ((client_queue_t **)_req_queue_tail == &node->next)
                    _req_queue_tail = (volatile client_queue_t **)node_ref;
                *node_ref = node->next;
Marvin Scholz's avatar
Marvin Scholz committed
500
501
                client_destroy(client);
                free(node);
502
503
504
505
                continue;
            }
        }
        node_ref = &node->next;
506
    }
507
    _handle_connection();
Jack Moffitt's avatar
Jack Moffitt committed
508
509
}

510
511
512
513
514
515
516
517
518
519
520
521
/* add client to body queue.
 */
static void _add_body_client(client_queue_t *node)
{
    ICECAST_LOG_DEBUG("Putting client %p in body queue.", node->client);

    thread_spin_lock(&_connection_lock);
    *_body_queue_tail = node;
    _body_queue_tail = (volatile client_queue_t **) &node->next;
    thread_spin_unlock(&_connection_lock);
}

522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
static client_slurp_result_t process_request_body_queue_one(client_queue_t *node, time_t timeout, size_t body_size_limit)
{
        client_t *client = node->client;
        client_slurp_result_t res;

        if (client->parser->req_type == httpp_req_post) {
            if (node->bodybuffer == NULL && client->request_body_read == 0) {
                if (client->request_body_length < 0) {
                    node->bodybufferlen = body_size_limit;
                    node->bodybuffer = malloc(node->bodybufferlen);
                } else if (client->request_body_length <= (ssize_t)body_size_limit) {
                    node->bodybufferlen = client->request_body_length;
                    node->bodybuffer = malloc(node->bodybufferlen);
                }
            }
        }

        if (node->bodybuffer) {
            res = client_body_slurp(client, node->bodybuffer, &(node->bodybufferlen));
            if (res == CLIENT_SLURP_SUCCESS) {
                httpp_parse_postdata(client->parser, node->bodybuffer, node->bodybufferlen);
                free(node->bodybuffer);
                node->bodybuffer = NULL;
            }
        } else {
            res = client_body_skip(client);
        }

        if (res != CLIENT_SLURP_SUCCESS) {
            if (client->con->con_time <= timeout || client->request_body_read >= body_size_limit) {
                return CLIENT_SLURP_ERROR;
            }
        }

        return res;
}
558
559
560
561
562

/* This queue reads data from the body of clients. */
static void process_request_body_queue (void)
{
    client_queue_t **node_ref = (client_queue_t **)&_body_queue;
563
564
565
    ice_config_t *config;
    time_t timeout;
    size_t body_size_limit;
566
567
568
569
570

    ICECAST_LOG_DEBUG("Processing body queue.");

    ICECAST_LOG_DEBUG("_body_queue=%p, &_body_queue=%p, _body_queue_tail=%p", _body_queue, &_body_queue, _body_queue_tail);

571
572
573
574
575
    config = config_get_config();
    timeout = time(NULL) - config->body_timeout;
    body_size_limit = config->body_size_limit;
    config_release_config();

576
577
578
579
580
    while (*node_ref) {
        client_queue_t *node = *node_ref;
        client_t *client = node->client;
        client_slurp_result_t res;

581
582
        node->tried_body = 1;

583
584
        ICECAST_LOG_DEBUG("Got client %p in body queue.", client);

585
        res = process_request_body_queue_one(node, timeout, body_size_limit);
586

587
        if (res != CLIENT_SLURP_NEEDS_MORE_DATA) {
588
589
590
591
592
593
594
595
596
597
598
599
            ICECAST_LOG_DEBUG("Putting client %p back in connection queue.", client);

            if ((client_queue_t **)_body_queue_tail == &(node->next))
                _body_queue_tail = (volatile client_queue_t **)node_ref;
            *node_ref = node->next;
            node->next = NULL;
            _add_connection(node);
            continue;
        }
        node_ref = &node->next;
    }
}
600

601
602
603
/* add node to the queue of requests. This is where the clients are when
 * initial http details are read.
 */
Marvin Scholz's avatar
Marvin Scholz committed
604
static void _add_request_queue(client_queue_t *node)
605
606
607
{
    *_req_queue_tail = node;
    _req_queue_tail = (volatile client_queue_t **)&node->next;
Jack Moffitt's avatar
Jack Moffitt committed
608
609
}

610
611
612
static client_queue_t *create_client_node(client_t *client)
{
    client_queue_t *node = calloc (1, sizeof (client_queue_t));
613
    const listener_t *listener;
614
615
616
617
618
619

    if (!node)
        return NULL;

    node->client = client;

620
    listener = listensocket_get_listener(client->con->listensocket_effective);
621
622
623
624

    if (listener) {
        if (listener->shoutcast_compat)
            node->shoutcast = 1;
625
626
        client->con->tlsmode = listener->tls;
        if (listener->tls == ICECAST_TLSMODE_RFC2818 && tls_ok)
627
            connection_uses_tls(client->con);
628
629
630
631
        if (listener->shoutcast_mount)
            node->shoutcast_mount = strdup(listener->shoutcast_mount);
    }

632
633
    listensocket_release_listener(client->con->listensocket_effective);

634
635
    return node;
}
636

637
638
639
640
641
642
643
644
void connection_queue(connection_t *con)
{
    client_queue_t *node;
    client_t *client = NULL;

    global_lock();
    if (client_create(&client, con, NULL) < 0) {
        global_unlock();
645
        client_send_error_by_id(client, ICECAST_ERROR_GEN_CLIENT_LIMIT);
646
647
648
649
650
651
652
653
654
655
        /* don't be too eager as this is an imposed hard limit */
        thread_sleep(400000);
        return;
    }

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

    if (sock_set_blocking(client->con->sock, 0) || sock_set_nodelay(client->con->sock)) {
        global_unlock();
656
        ICECAST_LOG_WARN("Failed to set tcp options on client connection, dropping");
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
        client_destroy(client);
        return;
    }
    node = create_client_node(client);
    global_unlock();

    if (node == NULL) {
        client_destroy(client);
        return;
    }

    _add_request_queue(node);
    stats_event_inc(NULL, "connections");
}

Marvin Scholz's avatar
Marvin Scholz committed
672
void connection_accept_loop(void)
Jack Moffitt's avatar
Jack Moffitt committed
673
{
674
    connection_t *con;
675
    ice_config_t *config;
676
    int duration = 300;
677

Marvin Scholz's avatar
Marvin Scholz committed
678
    config = config_get_config();
679
    get_tls_certificate(config);
Marvin Scholz's avatar
Marvin Scholz committed
680
    config_release_config();
Jack Moffitt's avatar
Jack Moffitt committed
681

Marvin Scholz's avatar
Marvin Scholz committed
682
    while (global.running == ICECAST_RUNNING) {
683
        con = listensocket_container_accept(global.listensockets, duration);
684

Marvin Scholz's avatar
Marvin Scholz committed
685
        if (con) {
686
            connection_queue(con);
687
            duration = 5;
Marvin Scholz's avatar
Marvin Scholz committed
688
        } else {
689
690
            if (_req_queue == NULL)
                duration = 300; /* use longer timeouts when nothing waiting */
691
        }
Marvin Scholz's avatar
Marvin Scholz committed
692
        process_request_queue();
693
        process_request_body_queue();
694
    }
Jack Moffitt's avatar
Jack Moffitt committed
695

696
697
698
    /* Give all the other threads notification to shut down */
    thread_cond_broadcast(&global.shutdown_cond);

699
700
701
    /* 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
702
703
}

704
705
706

/* Called when activating a source. Verifies that the source count is not
 * exceeded and applies any initial parameters.
707
 */
Marvin Scholz's avatar
Marvin Scholz committed
708
int connection_complete_source(source_t *source, int response)
709
{
710
    ice_config_t *config;
711

Marvin Scholz's avatar
Marvin Scholz committed
712
    global_lock();
713
    ICECAST_LOG_DEBUG("sources count is %d", global.sources);
714

715
    config = config_get_config();
Marvin Scholz's avatar
Marvin Scholz committed
716
    if (global.sources < config->source_limit) {
717
        const char *contenttype;
718
        mount_proxy *mountinfo;
719
720
721
722
        format_type_t format_type;

        /* setup format handler */
        contenttype = httpp_getvar (source->parser, "content-type");
Marvin Scholz's avatar
Marvin Scholz committed
723
724
        if (contenttype != NULL) {
            format_type = format_get_type(contenttype);
725

Marvin Scholz's avatar
Marvin Scholz committed
726
            if (format_type == FORMAT_ERROR) {
727
                config_release_config();
728
                global_unlock();
729
                if (response) {
730
                    client_send_error_by_id(source->client, ICECAST_ERROR_CON_CONTENT_TYPE_NOSYS);
731
732
                    source->client = NULL;
                }
733
                ICECAST_LOG_WARN("Content-type \"%s\" not supported, dropping source", contenttype);
734
735
                return -1;
            }
736
737
738
739
        } else if (source->parser->req_type == httpp_req_put) {
            config_release_config();
            global_unlock();
            if (response) {
740
                client_send_error_by_id(source->client, ICECAST_ERROR_CON_NO_CONTENT_TYPE_GIVEN);
741
742
743
744
745
746
747
748
                source->client = NULL;
            }
            ICECAST_LOG_ERROR("Content-type not given in PUT request, dropping source");
            return -1;
        } else {
            ICECAST_LOG_ERROR("No content-type header, falling back to backwards compatibility mode "
                    "for icecast 1.x relays. Assuming content is mp3. This behaviour is deprecated "
                    "and the source client will NOT work with future Icecast versions!");
749
            format_type = FORMAT_TYPE_GENERIC;
750
751
        }

Marvin Scholz's avatar
Marvin Scholz committed
752
        if (format_get_plugin (format_type, source) < 0) {
753
754
            global_unlock();
            config_release_config();
Marvin Scholz's avatar
Marvin Scholz committed
755
            if (response) {
756
                client_send_error_by_id(source->client, ICECAST_ERROR_CON_INTERNAL_FORMAT_ALLOC_ERROR);
757
758
                source->client = NULL;
            }
759
            ICECAST_LOG_WARN("plugin format failed for \"%s\"", source->mount);
760
761
762
            return -1;
        }

763
        global.sources++;
Marvin Scholz's avatar
Marvin Scholz committed
764
        stats_event_args(NULL, "sources", "%d", global.sources);
765
        global_unlock();
766

767
        source->running = 1;
Marvin Scholz's avatar
Marvin Scholz committed
768
769
        mountinfo = config_find_mount(config, source->mount, MOUNT_TYPE_NORMAL);
        source_update_settings(config, source, mountinfo);
770
        config_release_config();
771
        slave_rebuild_mounts();
772
773

        source->shutdown_rwlock = &_source_shutdown_rwlock;
774
        ICECAST_LOG_DEBUG("source is ready to start");
775
776
777

        return 0;
    }
778
    ICECAST_LOG_WARN("Request to add source when maximum source limit "
Marvin Scholz's avatar
Marvin Scholz committed
779
        "reached %d", global.sources);
780
781
782
783

    global_unlock();
    config_release_config();

Marvin Scholz's avatar
Marvin Scholz committed
784
    if (response) {
785
        client_send_error_by_id(source->client, ICECAST_ERROR_CON_SOURCE_CLIENT_LIMIT);
786
787
        source->client = NULL;
    }
788
789
790
791

    return -1;
}

Marvin Scholz's avatar
Marvin Scholz committed
792
static inline void source_startup(client_t *client, const char *uri)
793
794
{
    source_t *source;
Marvin Scholz's avatar
Marvin Scholz committed
795
    source = source_reserve(uri);
796

Marvin Scholz's avatar
Marvin Scholz committed
797
    if (source) {
798
        source->client = client;
799
800
        source->parser = client->parser;
        source->con = client->con;
Marvin Scholz's avatar
Marvin Scholz committed
801
802
803
        if (connection_complete_source(source, 1) < 0) {
            source_clear_source(source);
            source_free_source(source);
804
805
806
            return;
        }
        client->respcode = 200;
Philipp Schafft's avatar
Philipp Schafft committed
807
808
809
810
        if (client->protocol == ICECAST_PROTOCOL_SHOUTCAST) {
            client->respcode = 200;
            /* send this non-blocking but if there is only a partial write
             * then leave to header timeout */
811
            client_send_bytes(client, "OK2\r\nicy-caps:11\r\n\r\n", 20); /* TODO: Replace Magic Number! */
812
            source->shoutcast_compat = 1;
Marvin Scholz's avatar
Marvin Scholz committed
813
            source_client_callback(client, source);
Philipp Schafft's avatar
Philipp Schafft committed
814
        } else {
Marvin Scholz's avatar
Marvin Scholz committed
815
            refbuf_t *ok = refbuf_new(PER_CLIENT_REFBUF_SIZE);
816
            const char *expectcontinue;
817
            const char *transfer_encoding;
818
            int status_to_send = 200;
819
            ssize_t ret;
820

821
822
823
824
            transfer_encoding = httpp_getvar(source->parser, "transfer-encoding");
            if (transfer_encoding && strcasecmp(transfer_encoding, HTTPP_ENCODING_IDENTITY) != 0) {
                client->encoding = httpp_encoding_new(transfer_encoding);
                if (!client->encoding) {
825
                    client_send_error_by_id(client, ICECAST_ERROR_CON_UNIMPLEMENTED);
826
827
828
829
                    return;
                }
            }

830
831
832
833
834
835
836
            /* For PUT support we check for 100-continue and send back a 100 to stay in spec */
            expectcontinue = httpp_getvar (source->parser, "expect");

            if (expectcontinue != NULL) {
#ifdef HAVE_STRCASESTR
                if (strcasestr (expectcontinue, "100-continue") != NULL)
#else
837
                ICECAST_LOG_WARN("OS doesn't support case insensitive substring checks...");
838
839
840
841
842
843
844
                if (strstr (expectcontinue, "100-continue") != NULL)
#endif
                {
                    status_to_send = 100;
                }
            }

845
            client->respcode = 200;
846
847
            ret = util_http_build_header(ok->data, PER_CLIENT_REFBUF_SIZE, 0, 0, status_to_send, NULL, NULL, NULL, NULL, NULL, client);
            snprintf(ok->data + ret, PER_CLIENT_REFBUF_SIZE - ret, "Content-Length: 0\r\n\r\n");
Marvin Scholz's avatar
Marvin Scholz committed
848
            ok->len = strlen(ok->data);
849
            refbuf_release(client->refbuf);
850
            client->refbuf = ok;
Marvin Scholz's avatar
Marvin Scholz committed
851
            fserve_add_client_callback(client, source_client_callback, source);
852
        }
Marvin Scholz's avatar
Marvin Scholz committed
853
    } else {
854
        client_send_error_by_id(client, ICECAST_ERROR_CON_MOUNT_IN_USE);
855
        ICECAST_LOG_WARN("Mountpoint %s in use", uri);
856
    }
857
858
}

Philipp Schafft's avatar
Philipp Schafft committed
859
/* only called for native icecast source clients */
Marvin Scholz's avatar
Marvin Scholz committed
860
static void _handle_source_request(client_t *client, const char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
861
{
862
863
    ICECAST_LOG_INFO("Source logging in at mountpoint \"%s\" from %s as role %s",
        uri, client->con->ip, client->role);
864

Marvin Scholz's avatar
Marvin Scholz committed
865
    if (uri[0] != '/') {
Philipp Schafft's avatar
Philipp Schafft committed
866
        ICECAST_LOG_WARN("source mountpoint not starting with /");
867
        client_send_error_by_id(client, ICECAST_ERROR_CON_MOUNTPOINT_NOT_STARTING_WITH_SLASH);
868
        return;
869
    }
870

Philipp Schafft's avatar
Philipp Schafft committed
871
872
873
874
    source_startup(client, uri);
}


Marvin Scholz's avatar
Marvin Scholz committed
875
static void _handle_stats_request(client_t *client, char *uri)
Philipp Schafft's avatar
Philipp Schafft committed
876
877
878
{
    stats_event_inc(NULL, "stats_connections");

879
    client->respcode = 200;
880
    snprintf (client->refbuf->data, PER_CLIENT_REFBUF_SIZE,
Marvin Scholz's avatar
Marvin Scholz committed
881
882
883
        "HTTP/1.0 200 OK\r\n\r\n");
    client->refbuf->len = strlen(client->refbuf->data);
    fserve_add_client_callback(client, stats_callback, NULL);
884
885
}

Philipp Schafft's avatar
Philipp Schafft committed
886
887
888
/* if 0 is returned then the client should not be touched, however if -1
 * is returned then the caller is responsible for handling the client
 */
Marvin Scholz's avatar
Marvin Scholz committed
889
static int __add_listener_to_source(source_t *source, client_t *client)
890
{
Philipp Schafft's avatar
Philipp Schafft committed
891
    size_t loop = 10;
Michael Smith's avatar
Michael Smith committed
892

Marvin Scholz's avatar
Marvin Scholz committed
893
    do {
Philipp Schafft's avatar
Philipp Schafft committed
894
        ICECAST_LOG_DEBUG("max on %s is %ld (cur %lu)", source->mount,
Marvin Scholz's avatar
Marvin Scholz committed
895
            source->max_listeners, source->listeners);
Philipp Schafft's avatar
Philipp Schafft committed
896
897
898
899
        if (source->max_listeners == -1)
            break;
        if (source->listeners < (unsigned long)source->max_listeners)
            break;
900

Marvin Scholz's avatar
Marvin Scholz committed
901
        if (loop && source->fallback_when_full && source->fallback_mount) {
Philipp Schafft's avatar
Philipp Schafft committed
902
903
904
            source_t *next = source_find_mount (source->fallback_mount);
            if (!next) {
                ICECAST_LOG_ERROR("Fallback '%s' for full source '%s' not found",
Marvin Scholz's avatar
Marvin Scholz committed
905
                    source->mount, source->fallback_mount);
Philipp Schafft's avatar
Philipp Schafft committed
906
907
                return -1;
            }
908
            ICECAST_LOG_INFO("stream full, trying %s", next->mount);
Philipp Schafft's avatar
Philipp Schafft committed
909
910
911
912
913
914
915
916
917
918
919
            source = next;
            loop--;
            continue;
        }
        /* now we fail the client */
        return -1;
    } while (1);

    client->write_to_client = format_generic_write_to_client;
    client->check_buffer = format_check_http_buffer;
    client->refbuf->len = PER_CLIENT_REFBUF_SIZE;
Marvin Scholz's avatar
Marvin Scholz committed
920
    memset(client->refbuf->data, 0, PER_CLIENT_REFBUF_SIZE);
Philipp Schafft's avatar
Philipp Schafft committed
921
922

    /* lets add the client to the active list */
Marvin Scholz's avatar
Marvin Scholz committed
923
924
925
    avl_tree_wlock(source->pending_tree);
    avl_insert(source->pending_tree, client);
    avl_tree_unlock(source->pending_tree);
Philipp Schafft's avatar
Philipp Schafft committed
926

Marvin Scholz's avatar
Marvin Scholz committed
927
    if (source->running == 0 && source->on_demand) {
Philipp Schafft's avatar
Philipp Schafft committed
928
929
930
        /* enable on-demand relay to start, wake up the slave thread */
        ICECAST_LOG_DEBUG("kicking off on-demand relay");
        source->on_demand_req = 1;
931
    }
Philipp Schafft's avatar
Philipp Schafft committed
932
933
934
    ICECAST_LOG_DEBUG("Added client to %s", source->mount);
    return 0;
}
935

Philipp Schafft's avatar
Philipp Schafft committed
936
937
938
939
940
941
942
943
944
945
946
947
/* count the number of clients on a mount with same username and same role as the given one */
static inline ssize_t __count_user_role_on_mount (source_t *source, client_t *client) {
    ssize_t ret = 0;
    avl_node *node;

    avl_tree_rlock(source->client_tree);
    node = avl_get_first(source->client_tree);
    while (node) {
        client_t *existing_client = (client_t *)node->key;
        if (existing_client->username && client->username &&
            strcmp(existing_client->username, client->username) == 0 &&
            existing_client->role && client->role &&
Marvin Scholz's avatar
Marvin Scholz committed
948
            strcmp(existing_client->role, client->role) == 0) {
Philipp Schafft's avatar
Philipp Schafft committed
949
            ret++;
Marvin Scholz's avatar
Marvin Scholz committed
950
        }
Philipp Schafft's avatar
Philipp Schafft committed
951
        node = avl_get_next(node);
952
    }
Philipp Schafft's avatar
Philipp Schafft committed
953
954
955
956
    avl_tree_unlock(source->client_tree);

    avl_tree_rlock(source->pending_tree);
    node = avl_get_first(source->pending_tree);
Marvin Scholz's avatar
Marvin Scholz committed
957
    while (node) {
Philipp Schafft's avatar
Philipp Schafft committed
958
959
960
961
        client_t *existing_client = (client_t *)node->key;
        if (existing_client->username && client->username &&
            strcmp(existing_client->username, client->username) == 0 &&
            existing_client->role && client->role &&
Marvin Scholz's avatar
Marvin Scholz committed
962
            strcmp(existing_client->role, client->role) == 0){
Philipp Schafft's avatar
Philipp Schafft committed
963
            ret++;
Marvin Scholz's avatar
Marvin Scholz committed
964
        }
Philipp Schafft's avatar
Philipp Schafft committed
965
        node = avl_get_next(node);
966
    }