connection.c 53.2 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
            ICECAST_LOG_DEBUG("New fill in buffer=<empty>");
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
            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;
    }
372
373
}

374
375
376
377
/* 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
 */
378
static void _add_connection(client_queue_t *node)
Jack Moffitt's avatar
Jack Moffitt committed
379
{
380
    thread_spin_lock(&_connection_lock);
381
    *_con_queue_tail = node;
382
383
    _con_queue_tail = (volatile client_queue_t **) &node->next;
    thread_spin_unlock(&_connection_lock);
Jack Moffitt's avatar
Jack Moffitt committed
384
385
386
}


387
388
389
390
391
392
/* 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
393

Marvin Scholz's avatar
Marvin Scholz committed
394
    thread_spin_lock(&_connection_lock);
395

Marvin Scholz's avatar
Marvin Scholz committed
396
    if (_con_queue){
397
398
399
400
        node = (client_queue_t *)_con_queue;
        _con_queue = node->next;
        if (_con_queue == NULL)
            _con_queue_tail = &_con_queue;
401
        node->next = NULL;
402
    }
403

Marvin Scholz's avatar
Marvin Scholz committed
404
    thread_spin_unlock(&_connection_lock);
405
406
    return node;
}
Jack Moffitt's avatar
Jack Moffitt committed
407
408


409
/* run along queue checking for any data that has come in or a timeout */
410
static void process_request_queue (void)
411
412
{
    client_queue_t **node_ref = (client_queue_t **)&_req_queue;
413
414
415
416
417
418
    ice_config_t *config;
    int timeout;
    char peak;

    config = config_get_config();
    timeout = config->header_timeout;
419
    config_release_config();
Jack Moffitt's avatar
Jack Moffitt committed
420

Marvin Scholz's avatar
Marvin Scholz committed
421
    while (*node_ref) {
422
423
424
425
        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
426

427
        if (client->con->tlsmode == ICECAST_TLSMODE_AUTO || client->con->tlsmode == ICECAST_TLSMODE_AUTO_NO_PLAIN) {
428
429
            if (recv(client->con->sock, &peak, 1, MSG_PEEK) == 1) {
                if (peak == 0x16) { /* TLS Record Protocol Content type 0x16 == Handshake */
430
                    connection_uses_tls(client->con);
431
432
433
434
                }
            }
        }

Marvin Scholz's avatar
Marvin Scholz committed
435
436
        if (len > 0) {
            if (client->con->con_time + timeout <= time(NULL)) {
437
                len = 0;
Marvin Scholz's avatar
Marvin Scholz committed
438
439
440
            } else {
                len = client_read_bytes(client, buf, len);
            }
441
        }
Jack Moffitt's avatar
Jack Moffitt committed
442

Marvin Scholz's avatar
Marvin Scholz committed
443
        if (len > 0) {
444
            ssize_t stream_offset = -1;
445
446
447
            int pass_it = 1;
            char *ptr;

448
449
            /* handle \n, \r\n and nsvcap which for some strange reason has
             * EOL as \r\r\n */
450
            node->offset += len;
Marvin Scholz's avatar
Marvin Scholz committed
451
452
453
            client->refbuf->data[node->offset] = '\000';
            do {
                if (node->shoutcast == 1) {
454
                    /* password line */
455
456
                    if (strstr (client->refbuf->data, "\r\r\n") != NULL)
                        break;
457
458
459
460
461
462
463
                    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
464
465
                ptr = strstr(client->refbuf->data, "\r\r\n\r\r\n");
                if (ptr) {
466
                    stream_offset = (ptr+6) - client->refbuf->data;
467
468
                    break;
                }
Marvin Scholz's avatar
Marvin Scholz committed
469
470
                ptr = strstr(client->refbuf->data, "\r\n\r\n");
                if (ptr) {
471
                    stream_offset = (ptr+4) - client->refbuf->data;
472
473
                    break;
                }
Marvin Scholz's avatar
Marvin Scholz committed
474
475
                ptr = strstr(client->refbuf->data, "\n\n");
                if (ptr) {
476
                    stream_offset = (ptr+2) - client->refbuf->data;
477
478
479
480
                    break;
                }
                pass_it = 0;
            } while (0);
Jack Moffitt's avatar
Jack Moffitt committed
481

Marvin Scholz's avatar
Marvin Scholz committed
482
            if (pass_it) {
483
484
485
486
                if (stream_offset != -1) {
                    connection_read_put_back(client->con, client->refbuf->data + stream_offset, node->offset - stream_offset);
                    node->offset = stream_offset;
                }
487
488
489
490
                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
491
                _add_connection(node);
492
                continue;
493
            }
Marvin Scholz's avatar
Marvin Scholz committed
494
495
        } else {
            if (len == 0 || client->con->error) {
496
497
498
                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
499
500
                client_destroy(client);
                free(node);
501
502
503
504
                continue;
            }
        }
        node_ref = &node->next;
505
    }
506
    _handle_connection();
Jack Moffitt's avatar
Jack Moffitt committed
507
508
}

509
510
511
512
513
514
515
516
517
518
519
520
/* 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);
}

521
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
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;
}
557
558
559
560
561

/* 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;
562
563
564
    ice_config_t *config;
    time_t timeout;
    size_t body_size_limit;
565
566
567
568
569

    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);

570
571
572
573
574
    config = config_get_config();
    timeout = time(NULL) - config->body_timeout;
    body_size_limit = config->body_size_limit;
    config_release_config();

575
576
577
578
579
    while (*node_ref) {
        client_queue_t *node = *node_ref;
        client_t *client = node->client;
        client_slurp_result_t res;

580
581
        node->tried_body = 1;

582
583
        ICECAST_LOG_DEBUG("Got client %p in body queue.", client);

584
        res = process_request_body_queue_one(node, timeout, body_size_limit);
585

586
        if (res != CLIENT_SLURP_NEEDS_MORE_DATA) {
587
588
589
590
591
592
593
594
595
596
597
598
            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;
    }
}
599

600
601
602
/* 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
603
static void _add_request_queue(client_queue_t *node)
604
605
606
{
    *_req_queue_tail = node;
    _req_queue_tail = (volatile client_queue_t **)&node->next;
Jack Moffitt's avatar
Jack Moffitt committed
607
608
}

609
610
611
static client_queue_t *create_client_node(client_t *client)
{
    client_queue_t *node = calloc (1, sizeof (client_queue_t));
612
    const listener_t *listener;
613
614
615
616
617
618

    if (!node)
        return NULL;

    node->client = client;

619
    listener = listensocket_get_listener(client->con->listensocket_effective);
620
621
622
623

    if (listener) {
        if (listener->shoutcast_compat)
            node->shoutcast = 1;
624
625
        client->con->tlsmode = listener->tls;
        if (listener->tls == ICECAST_TLSMODE_RFC2818 && tls_ok)
626
            connection_uses_tls(client->con);
627
628
629
630
        if (listener->shoutcast_mount)
            node->shoutcast_mount = strdup(listener->shoutcast_mount);
    }

631
632
    listensocket_release_listener(client->con->listensocket_effective);

633
634
    return node;
}
635

636
637
638
639
640
641
642
643
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();
644
        client_send_error_by_id(client, ICECAST_ERROR_GEN_CLIENT_LIMIT);
645
646
647
648
649
650
651
652
653
654
        /* 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();
655
        ICECAST_LOG_WARN("Failed to set tcp options on client connection, dropping");
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
        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
671
void connection_accept_loop(void)
Jack Moffitt's avatar
Jack Moffitt committed
672
{
673
    connection_t *con;
674
    ice_config_t *config;
675
    int duration = 300;
676

Marvin Scholz's avatar
Marvin Scholz committed
677
    config = config_get_config();
678
    get_tls_certificate(config);
Marvin Scholz's avatar
Marvin Scholz committed
679
    config_release_config();
Jack Moffitt's avatar
Jack Moffitt committed
680

Marvin Scholz's avatar
Marvin Scholz committed
681
    while (global.running == ICECAST_RUNNING) {
682
        con = listensocket_container_accept(global.listensockets, duration);
683

Marvin Scholz's avatar
Marvin Scholz committed
684
        if (con) {
685
            connection_queue(con);
686
            duration = 5;
Marvin Scholz's avatar
Marvin Scholz committed
687
        } else {
688
689
            if (_req_queue == NULL)
                duration = 300; /* use longer timeouts when nothing waiting */
690
        }
Marvin Scholz's avatar
Marvin Scholz committed
691
        process_request_queue();
692
        process_request_body_queue();
693
    }
Jack Moffitt's avatar
Jack Moffitt committed
694

695
696
697
    /* Give all the other threads notification to shut down */
    thread_cond_broadcast(&global.shutdown_cond);

698
699
700
    /* 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
701
702
}

703
704
705

/* Called when activating a source. Verifies that the source count is not
 * exceeded and applies any initial parameters.
706
 */
Marvin Scholz's avatar
Marvin Scholz committed
707
int connection_complete_source(source_t *source, int response)
708
{
709
    ice_config_t *config;
710

Marvin Scholz's avatar
Marvin Scholz committed
711
    global_lock();
712
    ICECAST_LOG_DEBUG("sources count is %d", global.sources);
713

714
    config = config_get_config();
Marvin Scholz's avatar
Marvin Scholz committed
715
    if (global.sources < config->source_limit) {
716
        const char *contenttype;
717
        mount_proxy *mountinfo;
718
719
720
721
        format_type_t format_type;

        /* setup format handler */
        contenttype = httpp_getvar (source->parser, "content-type");
Marvin Scholz's avatar
Marvin Scholz committed
722
723
        if (contenttype != NULL) {
            format_type = format_get_type(contenttype);
724

Marvin Scholz's avatar
Marvin Scholz committed
725
            if (format_type == FORMAT_ERROR) {
726
                config_release_config();
727
                global_unlock();
728
                if (response) {
729
                    client_send_error_by_id(source->client, ICECAST_ERROR_CON_CONTENT_TYPE_NOSYS);
730
731
                    source->client = NULL;
                }
732
                ICECAST_LOG_WARN("Content-type \"%s\" not supported, dropping source", contenttype);
733
734
                return -1;
            }
735
736
737
738
        } else if (source->parser->req_type == httpp_req_put) {
            config_release_config();
            global_unlock();
            if (response) {
739
                client_send_error_by_id(source->client, ICECAST_ERROR_CON_NO_CONTENT_TYPE_GIVEN);
740
741
742
743
744
745
746
747
                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!");
748
            format_type = FORMAT_TYPE_GENERIC;
749
750
        }

Marvin Scholz's avatar
Marvin Scholz committed
751
        if (format_get_plugin (format_type, source) < 0) {
752
753
            global_unlock();
            config_release_config();
Marvin Scholz's avatar
Marvin Scholz committed
754
            if (response) {
755
                client_send_error_by_id(source->client, ICECAST_ERROR_CON_INTERNAL_FORMAT_ALLOC_ERROR);
756
757
                source->client = NULL;
            }
758
            ICECAST_LOG_WARN("plugin format failed for \"%s\"", source->mount);
759
760
761
            return -1;
        }

762
        global.sources++;
Marvin Scholz's avatar
Marvin Scholz committed
763
        stats_event_args(NULL, "sources", "%d", global.sources);
764
        global_unlock();
765

766
        source->running = 1;
Marvin Scholz's avatar
Marvin Scholz committed
767
768
        mountinfo = config_find_mount(config, source->mount, MOUNT_TYPE_NORMAL);
        source_update_settings(config, source, mountinfo);
769
        config_release_config();
770
        slave_rebuild_mounts();
771
772

        source->shutdown_rwlock = &_source_shutdown_rwlock;
773
        ICECAST_LOG_DEBUG("source is ready to start");
774
775
776

        return 0;
    }
777
    ICECAST_LOG_WARN("Request to add source when maximum source limit "
Marvin Scholz's avatar
Marvin Scholz committed
778
        "reached %d", global.sources);
779
780
781
782

    global_unlock();
    config_release_config();

Marvin Scholz's avatar
Marvin Scholz committed
783
    if (response) {
784
        client_send_error_by_id(source->client, ICECAST_ERROR_CON_SOURCE_CLIENT_LIMIT);
785
786
        source->client = NULL;
    }
787
788
789
790

    return -1;
}

Marvin Scholz's avatar
Marvin Scholz committed
791
static inline void source_startup(client_t *client, const char *uri)
792
793
{
    source_t *source;
Marvin Scholz's avatar
Marvin Scholz committed
794
    source = source_reserve(uri);
795

Marvin Scholz's avatar
Marvin Scholz committed
796
    if (source) {
797
        source->client = client;
798
799
        source->parser = client->parser;
        source->con = client->con;
Marvin Scholz's avatar
Marvin Scholz committed
800
801
802
        if (connection_complete_source(source, 1) < 0) {
            source_clear_source(source);
            source_free_source(source);
803
804
805
            return;
        }
        client->respcode = 200;
Philipp Schafft's avatar
Philipp Schafft committed
806
807
808
809
        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 */
810
            client_send_bytes(client, "OK2\r\nicy-caps:11\r\n\r\n", 20); /* TODO: Replace Magic Number! */
811
            source->shoutcast_compat = 1;
Marvin Scholz's avatar
Marvin Scholz committed
812
            source_client_callback(client, source);
Philipp Schafft's avatar
Philipp Schafft committed
813
        } else {
Marvin Scholz's avatar
Marvin Scholz committed
814
            refbuf_t *ok = refbuf_new(PER_CLIENT_REFBUF_SIZE);
815
            const char *expectcontinue;
816
            const char *transfer_encoding;
817
            int status_to_send = 200;
818
            ssize_t ret;
819

820
821
822
823
            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) {
824
                    client_send_error_by_id(client, ICECAST_ERROR_CON_UNIMPLEMENTED);
825
826
827
828
                    return;
                }
            }

829
830
831
832
833
834
835
            /* 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
836
                ICECAST_LOG_WARN("OS doesn't support case insensitive substring checks...");
837
838
839
840
841
842
843
                if (strstr (expectcontinue, "100-continue") != NULL)
#endif
                {
                    status_to_send = 100;
                }
            }

844
            client->respcode = 200;
845
846
            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
847
            ok->len = strlen(ok->data);
848
            refbuf_release(client->refbuf);
849
            client->refbuf = ok;
Marvin Scholz's avatar
Marvin Scholz committed
850
            fserve_add_client_callback(client, source_client_callback, source);
851
        }
Marvin Scholz's avatar
Marvin Scholz committed
852
    } else {
853
        client_send_error_by_id(client, ICECAST_ERROR_CON_MOUNT_IN_USE);
854
        ICECAST_LOG_WARN("Mountpoint %s in use", uri);
855
    }
856
857
}

Philipp Schafft's avatar
Philipp Schafft committed
858
/* only called for native icecast source clients */
Marvin Scholz's avatar
Marvin Scholz committed
859
static void _handle_source_request(client_t *client, const char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
860
{
861
862
    ICECAST_LOG_INFO("Source logging in at mountpoint \"%s\" from %s as role %s",
        uri, client->con->ip, client->role);
863

Marvin Scholz's avatar
Marvin Scholz committed
864
    if (uri[0] != '/') {
Philipp Schafft's avatar
Philipp Schafft committed
865
        ICECAST_LOG_WARN("source mountpoint not starting with /");
866
        client_send_error_by_id(client, ICECAST_ERROR_CON_MOUNTPOINT_NOT_STARTING_WITH_SLASH);
867
        return;
868
    }
869

Philipp Schafft's avatar
Philipp Schafft committed
870
871
872
873
    source_startup(client, uri);
}


Marvin Scholz's avatar
Marvin Scholz committed
874
static void _handle_stats_request(client_t *client, char *uri)
Philipp Schafft's avatar
Philipp Schafft committed
875
876
877
{
    stats_event_inc(NULL, "stats_connections");

878
    client->respcode = 200;
879
    snprintf (client->refbuf->data, PER_CLIENT_REFBUF_SIZE,
Marvin Scholz's avatar
Marvin Scholz committed
880
881
882
        "HTTP/1.0 200 OK\r\n\r\n");
    client->refbuf->len = strlen(client->refbuf->data);
    fserve_add_client_callback(client, stats_callback, NULL);
883
884
}

Philipp Schafft's avatar
Philipp Schafft committed
885
886
887
/* 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
888
static int __add_listener_to_source(source_t *source, client_t *client)
889
{
Philipp Schafft's avatar
Philipp Schafft committed
890
    size_t loop = 10;
Michael Smith's avatar
Michael Smith committed
891

Marvin Scholz's avatar
Marvin Scholz committed
892
    do {
Philipp Schafft's avatar
Philipp Schafft committed
893
        ICECAST_LOG_DEBUG("max on %s is %ld (cur %lu)", source->mount,
Marvin Scholz's avatar
Marvin Scholz committed
894
            source->max_listeners, source->listeners);
Philipp Schafft's avatar
Philipp Schafft committed
895
896
897
898
        if (source->max_listeners == -1)
            break;
        if (source->listeners < (unsigned long)source->max_listeners)
            break;
899

Marvin Scholz's avatar
Marvin Scholz committed
900
        if (loop && source->fallback_when_full && source->fallback_mount) {
Philipp Schafft's avatar
Philipp Schafft committed
901
902
903
            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
904
                    source->mount, source->fallback_mount);
Philipp Schafft's avatar
Philipp Schafft committed
905
906
                return -1;
            }
907
            ICECAST_LOG_INFO("stream full, trying %s", next->mount);
Philipp Schafft's avatar
Philipp Schafft committed
908
909
910
911
912
913
914
915
916
917
918
            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
919
    memset(client->refbuf->data, 0, PER_CLIENT_REFBUF_SIZE);
Philipp Schafft's avatar
Philipp Schafft committed
920
921

    /* lets add the client to the active list */
Marvin Scholz's avatar
Marvin Scholz committed
922
923
924
    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
925

Marvin Scholz's avatar
Marvin Scholz committed
926
    if (source->running == 0 && source->on_demand) {
Philipp Schafft's avatar
Philipp Schafft committed
927
928
929
        /* enable on-demand relay to start, wake up the slave thread */
        ICECAST_LOG_DEBUG("kicking off on-demand relay");
        source->on_demand_req = 1;
930
    }
Philipp Schafft's avatar
Philipp Schafft committed
931
932
933
    ICECAST_LOG_DEBUG("Added client to %s", source->mount);
    return 0;
}
934

Philipp Schafft's avatar
Philipp Schafft committed
935
936
937
938
939
940
941
942