connection.c 29.4 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12
/* Icecast
 *
 * This program is distributed under the GNU General Public License, version 2.
 * A copy of this license is included with this source.
 *
 * Copyright 2000-2004, Jack Moffitt <jack@xiph.org, 
 *                      Michael Smith <msmith@xiph.org>,
 *                      oddsock <oddsock@xiph.org>,
 *                      Karl Heyes <karl@xiph.org>
 *                      and others (see AUTHORS for details).
 */

13
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
14 15 16 17
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

Jack Moffitt's avatar
Jack Moffitt committed
18 19 20
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
21
#include <time.h>
22 23 24
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
25 26 27

#ifndef _WIN32
#include <sys/time.h>
Jack Moffitt's avatar
Jack Moffitt committed
28 29
#include <sys/socket.h>
#include <netinet/in.h>
30
#else
31
#include <winsock2.h>
32 33
#define snprintf _snprintf
#define strcasecmp stricmp
34
#define strncasecmp strnicmp
35
#endif
Jack Moffitt's avatar
Jack Moffitt committed
36 37 38

#include "os.h"

Karl Heyes's avatar
Karl Heyes committed
39 40 41 42
#include "thread/thread.h"
#include "avl/avl.h"
#include "net/sock.h"
#include "httpp/httpp.h"
Jack Moffitt's avatar
Jack Moffitt committed
43

44
#include "cfgfile.h"
Jack Moffitt's avatar
Jack Moffitt committed
45 46 47 48 49 50 51
#include "global.h"
#include "util.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
#include "logging.h"
52
#include "xslt.h"
53
#include "fserve.h"
54
#include "sighandler.h"
55 56

#include "yp.h"
Jack Moffitt's avatar
Jack Moffitt committed
57
#include "source.h"
58
#include "format.h"
59
#include "format_mp3.h"
60
#include "event.h"
61
#include "admin.h"
Michael Smith's avatar
Michael Smith committed
62
#include "auth.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 81 82
/* 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

83 84 85 86 87 88 89
typedef struct client_queue_tag {
    client_t *client;
    int offset;
    int stream_offset;
    int shoutcast;
    struct client_queue_tag *next;
} client_queue_t;
Jack Moffitt's avatar
Jack Moffitt committed
90 91

typedef struct _thread_queue_tag {
92 93
    thread_type *thread_id;
    struct _thread_queue_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
94 95 96
} thread_queue_t;

static mutex_t _connection_mutex;
97
static volatile unsigned long _current_id = 0;
Jack Moffitt's avatar
Jack Moffitt committed
98
static int _initialized = 0;
99
static thread_type *tid;
Jack Moffitt's avatar
Jack Moffitt committed
100

101 102 103 104
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;
static mutex_t _con_queue_mutex;
static mutex_t _req_queue_mutex;
Jack Moffitt's avatar
Jack Moffitt committed
105

106
rwlock_t _source_shutdown_rwlock;
Jack Moffitt's avatar
Jack Moffitt committed
107 108 109 110 111

static void *_handle_connection(void *arg);

void connection_initialize(void)
{
112 113 114
    if (_initialized) return;
    
    thread_mutex_create(&_connection_mutex);
115 116
    thread_mutex_create(&_con_queue_mutex);
    thread_mutex_create(&_req_queue_mutex);
117
    thread_mutex_create(&move_clients_mutex);
118
    thread_rwlock_create(&_source_shutdown_rwlock);
119
    thread_cond_create(&global.shutdown_cond);
Jack Moffitt's avatar
Jack Moffitt committed
120

121
    _initialized = 1;
Jack Moffitt's avatar
Jack Moffitt committed
122 123 124 125
}

void connection_shutdown(void)
{
126 127
    if (!_initialized) return;
    
128
    thread_cond_destroy(&global.shutdown_cond);
129
    thread_rwlock_destroy(&_source_shutdown_rwlock);
130 131
    thread_mutex_destroy(&_con_queue_mutex);
    thread_mutex_destroy(&_req_queue_mutex);
132
    thread_mutex_destroy(&_connection_mutex);
133
    thread_mutex_destroy(&move_clients_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
134

135
    _initialized = 0;
Jack Moffitt's avatar
Jack Moffitt committed
136 137 138 139
}

static unsigned long _next_connection_id(void)
{
140
    unsigned long id;
Jack Moffitt's avatar
Jack Moffitt committed
141

142 143 144
    thread_mutex_lock(&_connection_mutex);
    id = _current_id++;
    thread_mutex_unlock(&_connection_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
145

146
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
147 148
}

149 150
connection_t *connection_create (sock_t sock, sock_t serversock, char *ip)
{
151
    connection_t *con;
152 153 154 155 156 157 158 159 160
    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;
    }
161

162
    return con;
163 164
}

165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
static int wait_for_serversock(int timeout)
{
#ifdef HAVE_POLL
    struct pollfd ufds[MAX_LISTEN_SOCKETS];
    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) {
        return -2;
    }
    else if(ret == 0) {
        return -1;
    }
    else {
185
        int dst;
186
        for(i=0; i < global.server_sockets; i++) {
187
            if(ufds[i].revents & POLLIN)
188
                return ufds[i].fd;
189 190 191 192 193 194 195 196 197
            if(ufds[i].revents & (POLLHUP|POLLERR|POLLNVAL))
            {
                if (ufds[i].revents & (POLLHUP|POLLERR))
                {
                    close (global.serversock[i]);
                    WARN0("Had to close a listening socket");
                }
                global.serversock[i] = -1;
            }
198
        }
199 200 201 202 203 204 205 206 207 208 209
        /* remove any closed sockets */
        for(i=0, dst=0; i < global.server_sockets; i++)
        {
            if (global.serversock[i] == -1)
                continue;
            if (i!=dst)
                global.serversock[dst] = global.serversock[i];
            dst++;
        }
        global.server_sockets = dst;
        return -1;
210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
    }
#else
    fd_set rfds;
    struct timeval tv, *p=NULL;
    int i, ret;
    int max = -1;

    FD_ZERO(&rfds);

    for(i=0; i < global.server_sockets; i++) {
        FD_SET(global.serversock[i], &rfds);
        if(global.serversock[i] > max)
            max = global.serversock[i];
    }

    if(timeout >= 0) {
        tv.tv_sec = timeout/1000;
227
        tv.tv_usec = (timeout % 1000) * 1000;
228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247
        p = &tv;
    }

    ret = select(max+1, &rfds, NULL, NULL, p);
    if(ret < 0) {
        return -2;
    }
    else if(ret == 0) {
        return -1;
    }
    else {
        for(i=0; i < global.server_sockets; i++) {
            if(FD_ISSET(global.serversock[i], &rfds))
                return global.serversock[i];
        }
        return -1; /* Should be impossible, stop compiler warnings */
    }
#endif
}

Jack Moffitt's avatar
Jack Moffitt committed
248 249
static connection_t *_accept_connection(void)
{
250 251 252
    int sock;
    connection_t *con;
    char *ip;
253
    int serversock; 
Jack Moffitt's avatar
Jack Moffitt committed
254

255 256 257
    serversock = wait_for_serversock(100);
    if(serversock < 0)
        return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
258

259 260
    /* malloc enough room for a full IP address (including ipv6) */
    ip = (char *)malloc(MAX_ADDR_LEN);
Jack Moffitt's avatar
Jack Moffitt committed
261

262
    sock = sock_accept(serversock, ip, MAX_ADDR_LEN);
263 264 265 266 267
    if (sock >= 0)
    {
        con = connection_create (sock, serversock, ip);
        if (con == NULL)
            free (ip);
Jack Moffitt's avatar
Jack Moffitt committed
268

269 270
        return con;
    }
Jack Moffitt's avatar
Jack Moffitt committed
271

272 273 274 275
    if (!sock_recoverable(sock_error()))
        WARN2("accept() failed with error %d: %s", sock_error(), strerror(sock_error()));
    
    free(ip);
Jack Moffitt's avatar
Jack Moffitt committed
276

277
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
278 279 280
}


281 282 283 284 285
/* 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
286
{
287 288 289 290
    thread_mutex_lock (&_con_queue_mutex);
    *_con_queue_tail = node;
    _con_queue_tail = (volatile client_queue_t **)&node->next;
    thread_mutex_unlock (&_con_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
291 292 293
}


294 295 296 297 298 299
/* 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
300

301 302 303 304 305 306 307 308 309
    /* common case, no new connections so don't bother taking locks */
    if (_con_queue)
    {
        thread_mutex_lock (&_con_queue_mutex);
        node = (client_queue_t *)_con_queue;
        _con_queue = node->next;
        if (_con_queue == NULL)
            _con_queue_tail = &_con_queue;
        thread_mutex_unlock (&_con_queue_mutex);
310
    }
311 312
    return node;
}
Jack Moffitt's avatar
Jack Moffitt committed
313 314


315 316 317 318 319 320 321
/* run along queue checking for any data that has come in or a timeout */
static void process_request_queue ()
{
    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
322

323 324 325 326 327 328
    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
329

330 331 332 333 334 335 336
        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
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
        if (len > 0)
        {
            int pass_it = 1;
            char *ptr;

            node->offset += len;
            client->refbuf->data [node->offset] = '\000';
            do
            {
                if (node->shoutcast == 1)
                {
                    /* password line */
                    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 */
                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
371

372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393
            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);
            }
        }
        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;
394
    }
Jack Moffitt's avatar
Jack Moffitt committed
395 396
}

397

398 399 400 401 402 403 404 405 406
/* 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)
{
    thread_mutex_lock (&_req_queue_mutex);
    *_req_queue_tail = node;
    _req_queue_tail = (volatile client_queue_t **)&node->next;
    thread_mutex_unlock (&_req_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
407 408
}

409

Jack Moffitt's avatar
Jack Moffitt committed
410 411
void connection_accept_loop(void)
{
412
    connection_t *con;
Jack Moffitt's avatar
Jack Moffitt committed
413

414
    tid = thread_create ("connection thread", _handle_connection, NULL, THREAD_ATTACHED);
Jack Moffitt's avatar
Jack Moffitt committed
415

416 417
    while (global.running == ICE_RUNNING)
    {
418 419 420
        con = _accept_connection();

        if (con)
421
        {
422 423 424 425
            client_queue_t *node;
            ice_config_t *config;
            int i;
            client_t *client = NULL;
426

427 428 429 430 431 432 433 434
            global_lock();
            if (client_create (&client, con, NULL) < 0)
            {
                global_unlock();
                client_send_404 (client, "Icecast connection limit reached");
                continue;
            }
            global_unlock();
435

436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460
            /* setup client for reading incoming http */
            client->refbuf->data [PER_CLIENT_REFBUF_SIZE-1] = '\000';

            node = calloc (1, sizeof (client_queue_t));
            if (node == NULL)
            {
                client_destroy (client);
                continue;
            }
            node->client = client;

            /* Check for special shoutcast compatability processing */
            config = config_get_config();
            for (i = 0; i < global.server_sockets; i++)
            {
                if (global.serversock[i] == con->serversock)
                {
                    if (config->listeners[i].shoutcast_compat)
                        node->shoutcast = 1;
                }
            }
            config_release_config(); 

            sock_set_blocking (client->con->sock, SOCK_NONBLOCK);
            sock_set_nodelay (client->con->sock);
Jack Moffitt's avatar
Jack Moffitt committed
461

462 463
            _add_request_queue (node);
            stats_event_inc (NULL, "connections");
464
        }
465
        process_request_queue ();
466
    }
Jack Moffitt's avatar
Jack Moffitt committed
467

468 469 470
    /* Give all the other threads notification to shut down */
    thread_cond_broadcast(&global.shutdown_cond);

471 472
    if (tid)
        thread_join (tid);
Jack Moffitt's avatar
Jack Moffitt committed
473

474 475 476
    /* 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
477 478
}

479 480 481

/* Called when activating a source. Verifies that the source count is not
 * exceeded and applies any initial parameters.
482
 */
483
int connection_complete_source (source_t *source, int response)
484 485 486 487 488 489 490 491 492
{
    ice_config_t *config = config_get_config();

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

    if (global.sources < config->source_limit)
    {
        char *contenttype;
493
        mount_proxy *mountinfo;
494 495 496 497 498 499 500 501 502 503 504 505
        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)
            {
                global_unlock();
                config_release_config();
506 507
                if (response)
                {
508
                    client_send_404 (source->client, "Content-type not supported");
509 510
                    source->client = NULL;
                }
511 512 513 514 515 516
                WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
                return -1;
            }
        }
        else
        {
517
            WARN0("No content-type header, falling back to backwards compatibility mode "
518
                    "for icecast 1.x relays. Assuming content is mp3.");
519
            format_type = FORMAT_TYPE_GENERIC;
520 521
        }

Karl Heyes's avatar
Karl Heyes committed
522
        if (format_get_plugin (format_type, source) < 0)
523 524 525
        {
            global_unlock();
            config_release_config();
526 527
            if (response)
            {
528
                client_send_404 (source->client, "internal format allocation problem");
529 530
                source->client = NULL;
            }
531 532 533 534
            WARN1 ("plugin format failed for \"%s\"", source->mount);
            return -1;
        }

535 536 537
        global.sources++;
        stats_event_args (NULL, "sources", "%d", global.sources);
        global_unlock();
538

539 540 541 542 543
        source->running = 1;
        mountinfo = config_find_mount (config, source->mount);
        if (mountinfo == NULL)
            source_update_settings (config, source, mountinfo);
        source_recheck_mounts ();
544 545 546 547 548 549 550
        config_release_config();

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

        return 0;
    }
551
    WARN1("Request to add source when maximum source limit "
552 553 554 555 556
            "reached %d", global.sources);

    global_unlock();
    config_release_config();

557 558
    if (response)
    {
559
        client_send_404 (source->client, "too many sources connected");
560 561
        source->client = NULL;
    }
562 563 564 565 566

    return -1;
}


567 568
static int _check_pass_http(http_parser_t *parser, 
        char *correctuser, char *correctpass)
569 570 571 572 573 574 575 576 577 578 579 580 581
{
    /* This will look something like "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==" */
    char *header = httpp_getvar(parser, "authorization");
    char *userpass, *tmp;
    char *username, *password;

    if(header == NULL)
        return 0;

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

    userpass = util_base64_decode(header+6);
582 583 584
    if(userpass == NULL) {
        WARN1("Base64 decode of Authorization header \"%s\" failed",
                header+6);
585
        return 0;
586
    }
587 588 589 590 591 592 593 594 595 596

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

597
    if(strcmp(username, correctuser) || strcmp(password, correctpass)) {
598 599 600
        free(userpass);
        return 0;
    }
601
    free(userpass);
602 603 604 605

    return 1;
}

606 607 608 609 610 611 612 613
static int _check_pass_icy(http_parser_t *parser, char *correctpass)
{
    char *password;

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

614
    if (strcmp(password, correctpass))
615 616 617 618 619
        return 0;
    else
        return 1;
}

620
static int _check_pass_ice(http_parser_t *parser, char *correctpass)
621
{
622
    char *password;
623 624 625 626 627

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

628
    if (strcmp(password, correctpass))
629 630 631 632 633
        return 0;
    else
        return 1;
}

634
int connection_check_admin_pass(http_parser_t *parser)
635
{
636
    int ret;
637 638 639
    ice_config_t *config = config_get_config();
    char *pass = config->admin_password;
    char *user = config->admin_username;
640
    char *protocol;
641 642 643 644 645 646

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

647 648 649 650 651
    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);
652
    config_release_config();
653 654
    return ret;
}
Michael Smith's avatar
Michael Smith committed
655

656 657 658 659 660
int connection_check_relay_pass(http_parser_t *parser)
{
    int ret;
    ice_config_t *config = config_get_config();
    char *pass = config->relay_password;
661
    char *user = config->relay_username;
662

663 664
    if(!pass || !user) {
        config_release_config();
665
        return 0;
666
    }
667

668 669 670
    ret = _check_pass_http(parser, user, pass);
    config_release_config();
    return ret;
671 672
}

673
int connection_check_source_pass(http_parser_t *parser, const char *mount)
674
{
675 676
    ice_config_t *config = config_get_config();
    char *pass = config->source_password;
677
    char *user = "source";
678
    int ret;
679
    int ice_login = config->ice_login;
680
    char *protocol;
681

682
    mount_proxy *mountinfo = config_find_mount (config, mount);
683

684 685 686 687 688 689
    if (mountinfo)
    {
        if (mountinfo->password)
            pass = mountinfo->password;
        if (mountinfo->username)
            user = mountinfo->username;
690 691 692 693
    }

    if(!pass) {
        WARN0("No source password set, rejecting source");
694
        config_release_config();
695 696 697
        return 0;
    }

698
    protocol = httpp_getvar(parser, HTTPP_VAR_PROTOCOL);
699 700 701 702 703 704 705 706 707 708 709
    if(protocol != NULL && !strcmp(protocol, "ICY")) {
        ret = _check_pass_icy(parser, pass);
    }
    else {
        ret = _check_pass_http(parser, user, pass);
        if(!ret && ice_login)
        {
            ret = _check_pass_ice(parser, pass);
            if(ret)
                WARN0("Source is using deprecated icecast login");
        }
710
    }
711
    config_release_config();
712
    return ret;
713 714
}

715

716
static void _handle_source_request (client_t *client, char *uri, int auth_style)
717
{
718
    source_t *source;
719

720
    INFO1("Source logging in at mountpoint \"%s\"", uri);
721

722 723 724 725 726 727
    if (uri[0] != '/')
    {
        WARN0 ("source mountpoint not starting with /");
        client_send_401 (client);
        return;
    }
728
    if (auth_style == ICECAST_SOURCE_AUTH) {
729 730
        if (connection_check_source_pass (client->parser, uri) == 0)
        {
731 732 733 734
            /* We commonly get this if the source client is using the wrong
             * protocol: attempt to diagnose this and return an error
             */
            /* TODO: Do what the above comment says */
735
            INFO1("Source (%s) attempted to login with invalid or missing password", uri);
736 737 738
            client_send_401(client);
            return;
        }
739
    }
740 741 742
    source = source_reserve (uri);
    if (source)
    {
743 744 745
        if (auth_style == SHOUTCAST_SOURCE_AUTH) {
            source->shoutcast_compat = 1;
        }
746
        source->client = client;
747 748
        source->parser = client->parser;
        source->con = client->con;
749
        if (connection_complete_source (source, 1) < 0)
750
        {
751
            source_clear_source (source);
752 753 754
            source_free_source (source);
        }
        else
755
        {
756
            refbuf_t *ok = refbuf_new (PER_CLIENT_REFBUF_SIZE);
757
            client->respcode = 200;
758
            snprintf (ok->data, PER_CLIENT_REFBUF_SIZE,
759
                    "HTTP/1.0 200 OK\r\n\r\n");
760 761 762 763
            ok->len = strlen (ok->data);
            /* we may have unprocessed data read in, so don't overwrite it */
            ok->associated = client->refbuf;
            client->refbuf = ok;
764 765
            fserve_add_client_callback (client, source_client_callback, source);
        }
766 767 768 769
    }
    else
    {
        client_send_404 (client, "Mountpoint in use");
770
        WARN1 ("Mountpoint %s in use", uri);
771
    }
772 773
}

774

775
static void _handle_stats_request (client_t *client, char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
776
{
777
    stats_event_inc(NULL, "stats_connections");
778 779 780 781

    if (connection_check_admin_pass (client->parser) == 0)
    {
        client_send_401 (client);
782 783
        ERROR0("Bad password for stats connection");
        return;
784
    }
785

786
    client->respcode = 200;
787 788 789 790
    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);
791 792
}

793
static void _handle_get_request (client_t *client, char *passed_uri)
794
{
795 796
    int fileserve;
    int port;
797
    int i;
Karl Heyes's avatar
Karl Heyes committed
798 799
    char *serverhost = NULL;
    int serverport = 0;
800
    aliases *alias;
801
    ice_config_t *config;
802
    char *uri = passed_uri;
803 804 805 806

    config = config_get_config();
    fileserve = config->fileserve;
    port = config->port;
807
    for(i = 0; i < global.server_sockets; i++) {
808
        if(global.serversock[i] == client->con->serversock) {
809 810 811 812 813 814
            serverhost = config->listeners[i].bind_address;
            serverport = config->listeners[i].port;
            break;
        }
    }
    alias = config->aliases;
815

816 817 818
    /* 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
819
    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
820
    ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
821 822 823 824
    ** we need to handle the latter two before the former, as the latter two
    ** aren't subject to the limits.
    */
    /* TODO: add GUID-xxxxxx */
825

826 827 828
    /* 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))) {
829 830
            uri = strdup (alias->destination);
            DEBUG2 ("alias has made %s into %s", passed_uri, uri);
831 832 833 834
            break;
        }
        alias = alias->next;
    }
835 836 837
    config_release_config();

    stats_event_inc(NULL, "client_connections");
838

839
    /* Dispatch all admin requests */
840 841
    if ((strcmp(uri, "/admin.cgi") == 0) ||
        (strncmp(uri, "/admin/", 7) == 0)) {
842
        admin_handle_request(client, uri);
843
        if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
844 845 846
        return;
    }

847 848 849 850
    /* Here we are parsing the URI request to see
    ** if the extension is .xsl, if so, then process
    ** this request as an XSLT request
    */
851 852
    if (util_check_valid_extension (uri) == XSLT_CONTENT)
    {
853
        /* If the file exists, then transform it, otherwise, write a 404 */
854 855
        DEBUG0("Stats request, sending XSL transformed stats");
        stats_transform_xslt (client, uri);
856
        if (uri != passed_uri) free (uri);
857
        return;
858
    }
859

860
    add_client (uri, client);
861
    if (uri != passed_uri) free (uri);
862 863
}

864 865
static void _handle_shoutcast_compatible (client_queue_t *node)
{
866 867 868
    char *http_compliant;
    int http_compliant_len = 0;
    http_parser_t *parser;
869 870 871
    ice_config_t *config = config_get_config ();
    char *shoutcast_mount;
    client_t *client = node->client;
872

873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913
    if (node->shoutcast == 1)
    {
        char *source_password, *ptr;
        mount_proxy *mountinfo = config_find_mount (config, config->shoutcast_mount);

        if (mountinfo && mountinfo->password)
            source_password = strdup (mountinfo->password);
        else
            source_password = strdup (config->source_password);
        config_release_config();

        /* Get rid of trailing \r\n or \n after password */
        ptr = strstr (client->refbuf->data, "\r\n");
        if (ptr == NULL)
            ptr = strstr (client->refbuf->data, "\n");

        if (ptr == NULL)
        {
            client_destroy (client);
            free (source_password);
            free (node);
            return;
        }
        *ptr = '\0';

        if (strcmp (client->refbuf->data, source_password) == 0)
        {
            client->respcode = 200;
            /* send this non-blocking but if there is only a partial write
             * then leave to header timeout */
            sock_write (client->con->sock, "OK2\r\n");
            memset (client->refbuf->data, 0, client->refbuf->len);
            node->shoutcast = 2;
            node->offset = 0;
            /* we've checked the password, now send it back for reading headers */
            _add_request_queue (node);
            free (source_password);
            return;
        }
        client_destroy (client);
        free (node);
914 915
        return;
    }
916 917
    shoutcast_mount = strdup (config->shoutcast_mount);
    config_release_config();
918 919 920
    /* Here we create a valid HTTP request based of the information
       that was passed in via the non-HTTP style protocol above. This
       means we can use some of our existing code to handle this case */
921
    http_compliant_len = 20 + strlen (shoutcast_mount) + node->offset;
922
    http_compliant = (char *)calloc(1, http_compliant_len);
923
    snprintf (http_compliant, http_compliant_len,
924
            "SOURCE %s HTTP/1.0\r\n%s", shoutcast_mount, client->refbuf->data);
925 926
    parser = httpp_create_parser();
    httpp_initialize(parser, NULL);
927 928
    if (httpp_parse (parser, http_compliant, strlen(http_compliant)))
    {
929 930 931 932
        /* we may have more than just headers, so prepare for it */
        if (node->stream_offset == node->offset)
            client->refbuf->len = 0;
        else
933
        {
934 935 936
            char *ptr = client->refbuf->data;
            client->refbuf->len = node->offset - node->stream_offset;
            memmove (ptr, ptr + node->stream_offset, client->refbuf->len);
937
        }
938 939
        client->parser = parser;
        _handle_source_request (client, shoutcast_mount, SHOUTCAST_SOURCE_AUTH);
940
    }
941 942
    else
        client_destroy (client);
943
    free (http_compliant);
944 945 946
    free (shoutcast_mount);
    free (node);
    return;
947 948
}

949 950 951 952 953

/* Connection thread. Here we take clients off the connection queue and check
 * the contents provided. We set up the parser then hand off to the specific
 * request handler.
 */
954 955
static void *_handle_connection(void *arg)
{
956
    http_parser_t *parser;
957
    char *rawuri, *uri;
Jack Moffitt's avatar
Jack Moffitt committed
958

959
    while (global.running == ICE_RUNNING) {
Jack Moffitt's avatar
Jack Moffitt committed
960

961
        client_queue_t *node = _get_connection();
962

963 964 965
        if (node)
        {
            client_t *client = node->client;
Jack Moffitt's avatar
Jack Moffitt committed
966

967
            /* Check for special shoutcast compatability processing */
968 969 970
            if (node->shoutcast) 
            {
                _handle_shoutcast_compatible (node);
971 972
                continue;
            }
Jack Moffitt's avatar
Jack Moffitt committed
973

974
            /* process normal HTTP headers */
975 976
            parser = httpp_create_parser();
            httpp_initialize(parser, NULL);
977 978 979 980 981 982 983 984 985 986 987 988 989
            client->parser = parser;
            if (httpp_parse (parser, client->refbuf->data, node->offset))
            {
                /* we may have more than just headers, so prepare for it */
                if (node->stream_offset == node->offset)
                    client->refbuf->len = 0;
                else
                {
                    char *ptr = client->refbuf->data;
                    client->refbuf->len = node->offset - node->stream_offset;
                    memmove (ptr, ptr + node->stream_offset, client->refbuf->len);
                }
                free (node);
990 991
                
                if (strcmp("ICE",  httpp_getvar(parser, HTTPP_VAR_PROTOCOL)) &&
992
                    strcmp("HTTP", httpp_getvar(parser, HTTPP_VAR_PROTOCOL))) {
993
                    ERROR0("Bad HTTP protocol detected");
994
                    client_destroy (client);
995 996
                    continue;
                }
Jack Moffitt's avatar
Jack Moffitt committed
997

998 999 1000
                rawuri = httpp_getvar(parser, HTTPP_VAR_URI);
                uri = util_normalise_uri(rawuri);

1001 1002
                if (uri == NULL)
                {
1003
                    client_destroy (client);
1004 1005
                    continue;
                }
1006

1007
                if (parser->req_type == httpp_req_source) {
1008
                    _handle_source_request (client, uri, ICECAST_SOURCE_AUTH);
1009 1010
                }
                else if (parser->req_type == httpp_req_stats) {
1011
                    _handle_stats_request (client, uri);
1012 1013
                }
                else if (parser->req_type == httpp_req_get) {
1014
                    _handle_get_request (client, uri);
1015 1016
                }
                else {
1017
                    ERROR0("Wrong request type from client");
1018
                    client_send_400 (client, "unknown request");
1019 1020 1021
                }

                free(uri);
1022
            } 
1023 1024 1025
            else
            {
                free (node);
1026
                ERROR0("HTTP request parsing failed");
1027
                client_destroy (client);
1028
            }
1029
            continue;
1030
        }
1031
        thread_sleep (50000);
1032
    }
1033
    DEBUG0 ("Connection thread done");
Jack Moffitt's avatar
Jack Moffitt committed
1034

1035
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
1036 1037 1038 1039
}

void connection_close(connection_t *con)
{
1040 1041 1042 1043
    sock_close(con->sock);
    if (con->ip) free(con->ip);
    if (con->host) free(con->host);
    free(con);
Jack Moffitt's avatar
Jack Moffitt committed
1044
}