connection.c 33.8 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>
Jack Moffitt's avatar
Jack Moffitt committed
22
#include <sys/types.h>
23
#include <sys/stat.h>
24 25 26
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
27 28 29

#ifndef _WIN32
#include <sys/time.h>
Jack Moffitt's avatar
Jack Moffitt committed
30 31
#include <sys/socket.h>
#include <netinet/in.h>
32
#else
33
#include <winsock2.h>
34 35
#define snprintf _snprintf
#define strcasecmp stricmp
36
#define strncasecmp strnicmp
37
#endif
Jack Moffitt's avatar
Jack Moffitt committed
38 39 40

#include "os.h"

Karl Heyes's avatar
Karl Heyes committed
41 42 43 44
#include "thread/thread.h"
#include "avl/avl.h"
#include "net/sock.h"
#include "httpp/httpp.h"
Jack Moffitt's avatar
Jack Moffitt committed
45

46
#include "cfgfile.h"
Jack Moffitt's avatar
Jack Moffitt committed
47 48 49 50 51 52 53
#include "global.h"
#include "util.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
#include "logging.h"
54
#include "xslt.h"
55
#include "fserve.h"
56
#include "sighandler.h"
57 58

#include "yp.h"
Jack Moffitt's avatar
Jack Moffitt committed
59
#include "source.h"
Michael Smith's avatar
Michael Smith committed
60
#include "format.h"
61
#include "format_mp3.h"
Michael Smith's avatar
Michael Smith committed
62
#include "event.h"
63
#include "admin.h"
Michael Smith's avatar
Michael Smith committed
64
#include "auth.h"
Jack Moffitt's avatar
Jack Moffitt committed
65 66 67

#define CATMODULE "connection"

68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84
/* 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

Jack Moffitt's avatar
Jack Moffitt committed
85
typedef struct con_queue_tag {
86 87
    connection_t *con;
    struct con_queue_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
88 89 90
} con_queue_t;

typedef struct _thread_queue_tag {
91 92
    thread_type *thread_id;
    struct _thread_queue_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
93 94 95
} thread_queue_t;

static mutex_t _connection_mutex;
96
static volatile unsigned long _current_id = 0;
Jack Moffitt's avatar
Jack Moffitt committed
97 98
static int _initialized = 0;

99
volatile static con_queue_t *_queue = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
100 101 102 103
static mutex_t _queue_mutex;

static thread_queue_t *_conhands = NULL;

104
rwlock_t _source_shutdown_rwlock;
Jack Moffitt's avatar
Jack Moffitt committed
105 106 107 108 109

static void *_handle_connection(void *arg);

void connection_initialize(void)
{
110 111 112 113
    if (_initialized) return;
    
    thread_mutex_create(&_connection_mutex);
    thread_mutex_create(&_queue_mutex);
114
    thread_mutex_create(&move_clients_mutex);
115
    thread_rwlock_create(&_source_shutdown_rwlock);
116
    thread_cond_create(&global.shutdown_cond);
Jack Moffitt's avatar
Jack Moffitt committed
117

118
    _initialized = 1;
Jack Moffitt's avatar
Jack Moffitt committed
119 120 121 122
}

void connection_shutdown(void)
{
123 124
    if (!_initialized) return;
    
125
    thread_cond_destroy(&global.shutdown_cond);
126 127 128
    thread_rwlock_destroy(&_source_shutdown_rwlock);
    thread_mutex_destroy(&_queue_mutex);
    thread_mutex_destroy(&_connection_mutex);
129
    thread_mutex_destroy(&move_clients_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
130

131
    _initialized = 0;
Jack Moffitt's avatar
Jack Moffitt committed
132 133 134 135
}

static unsigned long _next_connection_id(void)
{
136
    unsigned long id;
Jack Moffitt's avatar
Jack Moffitt committed
137

138 139 140
    thread_mutex_lock(&_connection_mutex);
    id = _current_id++;
    thread_mutex_unlock(&_connection_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
141

142
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
143 144
}

145
connection_t *create_connection(sock_t sock, sock_t serversock, char *ip) {
146 147 148 149
    connection_t *con;
    con = (connection_t *)malloc(sizeof(connection_t));
    memset(con, 0, sizeof(connection_t));
    con->sock = sock;
150
    con->serversock = serversock;
151 152 153
    con->con_time = time(NULL);
    con->id = _next_connection_id();
    con->ip = ip;
Michael Smith's avatar
Michael Smith committed
154 155 156 157

    con->event_number = EVENT_NO_EVENT;
    con->event = NULL;

158
    return con;
159 160
}

161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180
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 {
181
        int dst;
182
        for(i=0; i < global.server_sockets; i++) {
183
            if(ufds[i].revents & POLLIN)
184
                return ufds[i].fd;
185 186 187 188 189 190 191 192 193
            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;
            }
194
        }
195 196 197 198 199 200 201 202 203 204 205
        /* 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;
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222
    }
#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;
223
        tv.tv_usec = (timeout % 1000) * 1000;
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243
        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
244 245
static connection_t *_accept_connection(void)
{
246 247 248
    int sock;
    connection_t *con;
    char *ip;
249
    int serversock; 
Jack Moffitt's avatar
Jack Moffitt committed
250

251 252 253
    serversock = wait_for_serversock(100);
    if(serversock < 0)
        return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
254

255 256
    /* malloc enough room for a full IP address (including ipv6) */
    ip = (char *)malloc(MAX_ADDR_LEN);
Jack Moffitt's avatar
Jack Moffitt committed
257

258 259
    sock = sock_accept(serversock, ip, MAX_ADDR_LEN);
    if (sock >= 0) {
260
        con = create_connection(sock, serversock, ip);
Jack Moffitt's avatar
Jack Moffitt committed
261

262 263
        return con;
    }
Jack Moffitt's avatar
Jack Moffitt committed
264

265 266 267 268
    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
269

270
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
271 272 273 274
}

static void _add_connection(connection_t *con)
{
275
    con_queue_t *node;
Jack Moffitt's avatar
Jack Moffitt committed
276

277 278 279 280
    node = (con_queue_t *)malloc(sizeof(con_queue_t));
    
    thread_mutex_lock(&_queue_mutex);
    node->con = con;
281
    node->next = (con_queue_t *)_queue;
282 283
    _queue = node;
    thread_mutex_unlock(&_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
284 285
}

286
static void _push_thread(thread_queue_t **queue, thread_type *thread_id)
Jack Moffitt's avatar
Jack Moffitt committed
287
{
288 289 290 291 292 293 294 295 296 297 298 299 300 301
    /* create item */
    thread_queue_t *item = (thread_queue_t *)malloc(sizeof(thread_queue_t));
    item->thread_id = thread_id;
    item->next = NULL;


    thread_mutex_lock(&_queue_mutex);
    if (*queue == NULL) {
        *queue = item;
    } else {
        item->next = *queue;
        *queue = item;
    }
    thread_mutex_unlock(&_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
302 303
}

304
static thread_type *_pop_thread(thread_queue_t **queue)
Jack Moffitt's avatar
Jack Moffitt committed
305
{
306 307
    thread_type *id;
    thread_queue_t *item;
Jack Moffitt's avatar
Jack Moffitt committed
308

309
    thread_mutex_lock(&_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
310

311 312 313 314 315
    item = *queue;
    if (item == NULL) {
        thread_mutex_unlock(&_queue_mutex);
        return NULL;
    }
Jack Moffitt's avatar
Jack Moffitt committed
316

317 318 319 320
    *queue = item->next;
    item->next = NULL;
    id = item->thread_id;
    free(item);
Jack Moffitt's avatar
Jack Moffitt committed
321

322
    thread_mutex_unlock(&_queue_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
323

324
    return id;
Jack Moffitt's avatar
Jack Moffitt committed
325 326 327 328
}

static void _build_pool(void)
{
329 330
    ice_config_t *config;
    int i;
331
    thread_type *tid;
332
    char buff[64];
Michael Smith's avatar
Michael Smith committed
333
    int threadpool_size;
Jack Moffitt's avatar
Jack Moffitt committed
334

335
    config = config_get_config();
Michael Smith's avatar
Michael Smith committed
336 337
    threadpool_size = config->threadpool_size;
    config_release_config();
Jack Moffitt's avatar
Jack Moffitt committed
338

339 340 341 342 343
    for (i = 0; i < threadpool_size; i++) {
        snprintf(buff, 64, "Connection Thread #%d", i);
        tid = thread_create(buff, _handle_connection, NULL, THREAD_ATTACHED);
        _push_thread(&_conhands, tid);
    }
Jack Moffitt's avatar
Jack Moffitt committed
344 345 346 347
}

static void _destroy_pool(void)
{
348 349 350 351 352 353 354 355 356 357
    thread_type *id;
    int i;

    i = 0;

    id = _pop_thread(&_conhands);
    while (id != NULL) {
        thread_join(id);
        id = _pop_thread(&_conhands);
    }
358
    INFO0("All connection threads down");
Jack Moffitt's avatar
Jack Moffitt committed
359 360 361 362
}

void connection_accept_loop(void)
{
363
    connection_t *con;
Jack Moffitt's avatar
Jack Moffitt committed
364

365
    _build_pool();
Jack Moffitt's avatar
Jack Moffitt committed
366

367 368
    while (global.running == ICE_RUNNING)
    {
369
        if (global . schedule_config_reread)
370 371 372 373 374
        {
            /* reread config file */
            INFO0("Scheduling config reread ...");

            connection_inject_event(EVENT_CONFIG_READ, NULL);
375
            global . schedule_config_reread = 0;
376 377
        }

378
        con = _accept_connection();
Jack Moffitt's avatar
Jack Moffitt committed
379

380 381 382 383
        if (con) {
            _add_connection(con);
        }
    }
Jack Moffitt's avatar
Jack Moffitt committed
384

385 386 387
    /* Give all the other threads notification to shut down */
    thread_cond_broadcast(&global.shutdown_cond);

388
    _destroy_pool();
Jack Moffitt's avatar
Jack Moffitt committed
389

390 391 392
    /* 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
393 394 395 396
}

static connection_t *_get_connection(void)
{
397 398 399 400
    con_queue_t *node = NULL;
    con_queue_t *oldnode = NULL;
    connection_t *con = NULL;

401 402 403 404
    /* common case, no new connections so don't bother taking locks */
    if (_queue == NULL)
        return NULL;

405 406
    thread_mutex_lock(&_queue_mutex);
    if (_queue) {
407
        node = (con_queue_t *)_queue;
408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426
        while (node->next) {
            oldnode = node;
            node = node->next;
        }
        
        /* node is now the last node
        ** and oldnode is the previous one, or NULL
        */
        if (oldnode) oldnode->next = NULL;
        else (_queue) = NULL;
    }
    thread_mutex_unlock(&_queue_mutex);

    if (node) {
        con = node->con;
        free(node);
    }

    return con;
Jack Moffitt's avatar
Jack Moffitt committed
427 428
}

Michael Smith's avatar
Michael Smith committed
429 430 431 432 433 434 435 436 437
void connection_inject_event(int eventnum, void *event_data) {
    connection_t *con = calloc(1, sizeof(connection_t));

    con->event_number = eventnum;
    con->event = event_data;

    _add_connection(con);
}

438 439 440

/* Called when activating a source. Verifies that the source count is not
 * exceeded and applies any initial parameters.
441
 */
442 443 444 445 446 447 448 449 450 451
int connection_complete_source (source_t *source)
{
    ice_config_t *config = config_get_config();

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

    if (global.sources < config->source_limit)
    {
        char *contenttype;
452
        mount_proxy *mountinfo;
453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472
        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();
                if (source->client)
                    client_send_404 (source->client, "Content-type not supported");
                WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
                return -1;
            }
        }
        else
        {
473
            WARN0("No content-type header, falling back to backwards compatibility mode "
474
                    "for icecast 1.x relays. Assuming content is mp3.");
475
            format_type = FORMAT_TYPE_GENERIC;
476 477
        }

Karl Heyes's avatar
Karl Heyes committed
478
        if (format_get_plugin (format_type, source) < 0)
479 480 481 482 483 484
        {
            global_unlock();
            config_release_config();
            if (source->client)
                client_send_404 (source->client, "internal format allocation problem");
            WARN1 ("plugin format failed for \"%s\"", source->mount);
485
            source->client = NULL;
486 487 488 489
            return -1;
        }

        global.sources++;
Karl Heyes's avatar
Karl Heyes committed
490
        stats_event_args (NULL, "sources", "%d", global.sources);
491 492 493 494 495 496 497 498
        global_unlock();

        /* for relays, we don't yet have a client, however we do require one
         * to retrieve the stream from.  This is created here, quite late,
         * because we can't use this client to return an error code/message,
         * so we only do this once we know we're going to accept the source.
         */
        if (source->client == NULL)
499
        {
500
            source->client = client_create (source->con, source->parser);
501 502 503 504 505 506 507 508 509 510 511 512 513
            if (source->client == NULL)
            {
                config_release_config();
                global_lock();
                global.sources--;
                global_unlock();
                connection_close (source->con);
                source->con = NULL;
                httpp_destroy (source->parser);
                source->parser = NULL;
                return -1;
            }
        }
514

515 516 517 518 519
        source->running = 1;
        mountinfo = config_find_mount (config, source->mount);
        if (mountinfo == NULL)
            source_update_settings (config, source, mountinfo);
        source_recheck_mounts ();
520 521 522 523 524 525 526
        config_release_config();

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

        return 0;
    }
527
    WARN1("Request to add source when maximum source limit "
528 529 530 531 532 533 534 535 536 537 538 539
            "reached %d", global.sources);

    global_unlock();
    config_release_config();

    if (source->client)
        client_send_404 (source->client, "too many sources connected");

    return -1;
}


540 541
static int _check_pass_http(http_parser_t *parser, 
        char *correctuser, char *correctpass)
542 543 544 545 546 547 548 549 550 551 552 553 554
{
    /* 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);
555 556 557
    if(userpass == NULL) {
        WARN1("Base64 decode of Authorization header \"%s\" failed",
                header+6);
558
        return 0;
559
    }
560 561 562 563 564 565 566 567 568 569

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

570
    if(strcmp(username, correctuser) || strcmp(password, correctpass)) {
571 572 573
        free(userpass);
        return 0;
    }
574
    free(userpass);
575 576 577 578

    return 1;
}

579 580 581 582 583 584 585 586
static int _check_pass_icy(http_parser_t *parser, char *correctpass)
{
    char *password;

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

587
    if (strcmp(password, correctpass))
588 589 590 591 592
        return 0;
    else
        return 1;
}

593
static int _check_pass_ice(http_parser_t *parser, char *correctpass)
594
{
595
    char *password;
596 597 598 599 600

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

601
    if (strcmp(password, correctpass))
602 603 604 605 606
        return 0;
    else
        return 1;
}

607
int connection_check_admin_pass(http_parser_t *parser)
608
{
609
    int ret;
Michael Smith's avatar
Michael Smith committed
610 611 612
    ice_config_t *config = config_get_config();
    char *pass = config->admin_password;
    char *user = config->admin_username;
613
    char *protocol;
614 615 616 617 618 619

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

620 621 622 623 624
    protocol = httpp_getvar (parser, HTTPP_VAR_PROTOCOL);
    if (protocol && strcmp (protocol, "ICY") == 0)
        ret = _check_pass_icy (parser, pass);
    else 
        ret = _check_pass_http (parser, user, pass);
Michael Smith's avatar
Michael Smith committed
625
    config_release_config();
626 627
    return ret;
}
Michael Smith's avatar
Michael Smith committed
628

629 630 631 632 633
int connection_check_relay_pass(http_parser_t *parser)
{
    int ret;
    ice_config_t *config = config_get_config();
    char *pass = config->relay_password;
634
    char *user = config->relay_username;
Michael Smith's avatar
Michael Smith committed
635

636 637
    if(!pass || !user) {
        config_release_config();
638
        return 0;
639
    }
640

641 642 643
    ret = _check_pass_http(parser, user, pass);
    config_release_config();
    return ret;
644 645
}

646
int connection_check_source_pass(http_parser_t *parser, const char *mount)
647
{
Michael Smith's avatar
Michael Smith committed
648 649
    ice_config_t *config = config_get_config();
    char *pass = config->source_password;
650
    char *user = "source";
651
    int ret;
Michael Smith's avatar
Michael Smith committed
652
    int ice_login = config->ice_login;
653
    char *protocol;
Michael Smith's avatar
Michael Smith committed
654

655
    mount_proxy *mountinfo = config_find_mount (config, mount);
656

657 658 659 660 661 662
    if (mountinfo)
    {
        if (mountinfo->password)
            pass = mountinfo->password;
        if (mountinfo->username)
            user = mountinfo->username;
663 664 665 666
    }

    if(!pass) {
        WARN0("No source password set, rejecting source");
667
        config_release_config();
668 669 670
        return 0;
    }

671
    protocol = httpp_getvar(parser, HTTPP_VAR_PROTOCOL);
672 673 674 675 676 677 678 679 680 681 682
    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");
        }
683
    }
684
    config_release_config();
685
    return ret;
686 687
}

688

689
static void _handle_source_request (client_t *client, char *uri, int auth_style)
690
{
691
    source_t *source;
692

693
    INFO1("Source logging in at mountpoint \"%s\"", uri);
694

695 696 697 698 699 700
    if (uri[0] != '/')
    {
        WARN0 ("source mountpoint not starting with /");
        client_send_401 (client);
        return;
    }
701
    if (auth_style == ICECAST_SOURCE_AUTH) {
702 703
        if (connection_check_source_pass (client->parser, uri) == 0)
        {
704 705 706 707
            /* 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 */
708
            INFO1("Source (%s) attempted to login with invalid or missing password", uri);
709 710 711
            client_send_401(client);
            return;
        }
712
    }
713 714 715
    source = source_reserve (uri);
    if (source)
    {
716 717 718
        if (auth_style == SHOUTCAST_SOURCE_AUTH) {
            source->shoutcast_compat = 1;
        }
719
        source->client = client;
720 721
        source->parser = client->parser;
        source->con = client->con;
722 723 724 725 726 727 728 729 730 731 732 733
        if (connection_complete_source (source) < 0)
        {
            source->client = NULL;
            source_free_source (source);
        }
        else
            thread_create ("Source Thread", source_client_thread,
                    source, THREAD_DETACHED);
    }
    else
    {
        client_send_404 (client, "Mountpoint in use");
734
        WARN1 ("Mountpoint %s in use", uri);
735
    }
736 737
}

738

739
static void _handle_stats_request (client_t *client, char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
740
{
741
    stats_event_inc(NULL, "stats_connections");
742 743 744 745

    if (connection_check_admin_pass (client->parser) == 0)
    {
        client_send_401 (client);
746 747
        ERROR0("Bad password for stats connection");
        return;
748
    }
749

750 751 752 753 754 755 756
    client->respcode = 200;
    if (sock_write (client->con->sock, "HTTP/1.0 200 OK\r\n\r\n") < 19)
    {
        client_destroy (client);
        ERROR0 ("failed to write header");
        return;
    }
757 758

    thread_create("Stats Connection", stats_connection, (void *)client, THREAD_DETACHED);
759 760
}

761
static void _handle_get_request (client_t *client, char *passed_uri)
762 763 764
{
    char *fullpath;
    int bytes;
765 766
    struct stat statbuf;
    source_t *source;
Michael Smith's avatar
Michael Smith committed
767
    int fileserve;
768
    char *host = NULL;
Michael Smith's avatar
Michael Smith committed
769
    int port;
770
    int i;
Karl Heyes's avatar
Karl Heyes committed
771 772
    char *serverhost = NULL;
    int serverport = 0;
773
    aliases *alias;
Michael Smith's avatar
Michael Smith committed
774
    ice_config_t *config;
775
    int ret;
776
    char *uri = passed_uri;
Michael Smith's avatar
Michael Smith committed
777 778 779

    config = config_get_config();
    fileserve = config->fileserve;
780 781
    if (config->hostname)
        host = strdup (config->hostname);
Michael Smith's avatar
Michael Smith committed
782
    port = config->port;
783
    for(i = 0; i < global.server_sockets; i++) {
784
        if(global.serversock[i] == client->con->serversock) {
785 786 787 788 789 790
            serverhost = config->listeners[i].bind_address;
            serverport = config->listeners[i].port;
            break;
        }
    }
    alias = config->aliases;
791

792 793 794
    /* 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
795
    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
796
    ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
797 798 799 800
    ** we need to handle the latter two before the former, as the latter two
    ** aren't subject to the limits.
    */
    /* TODO: add GUID-xxxxxx */
801

802 803 804
    /* 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))) {
805 806
            uri = strdup (alias->destination);
            DEBUG2 ("alias has made %s into %s", passed_uri, uri);
807 808 809 810
            break;
        }
        alias = alias->next;
    }
811 812 813
    config_release_config();

    stats_event_inc(NULL, "client_connections");
814

815
    /* Dispatch all admin requests */
816 817
    if ((strcmp(uri, "/admin.cgi") == 0) ||
        (strncmp(uri, "/admin/", 7) == 0)) {
818
        admin_handle_request(client, uri);
819
        if (uri != passed_uri) free (uri);
820
        free (host);
Michael Smith's avatar
Michael Smith committed
821 822 823
        return;
    }

824 825 826 827
    /* Here we are parsing the URI request to see
    ** if the extension is .xsl, if so, then process
    ** this request as an XSLT request
    */
828 829
    fullpath = util_get_path_from_normalised_uri(uri);
    if (util_check_valid_extension(fullpath) == XSLT_CONTENT) {
830 831
        /* If the file exists, then transform it, otherwise, write a 404 */
        if (stat(fullpath, &statbuf) == 0) {
832
            DEBUG0("Stats request, sending XSL transformed stats");
833
            client->respcode = 200;
834
            bytes = sock_write(client->con->sock, 
835 836 837
                    "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n");
            if(bytes > 0) client->con->sent_bytes = bytes;
            stats_transform_xslt(client, fullpath);
838 839 840
            client_destroy(client);
        }
        else {
841
            client_send_404(client, "The file you requested could not be found");
842
        }
843
        free(fullpath);
844
        if (uri != passed_uri) free (uri);
845
        free (host);
846
        return;
847
    }
848
    else if(fileserve && stat(fullpath, &statbuf) == 0 && 
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
849
#ifdef _WIN32
850
            ((statbuf.st_mode) & _S_IFREG))
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
851
#else
852
            S_ISREG(statbuf.st_mode)) 
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
853
#endif
Michael Smith's avatar
Michael Smith committed
854
    {
855
        fserve_client_create(client, fullpath);
856
        free(fullpath);
857
        if (uri != passed_uri) free (uri);
858
        free (host);
859 860
        return;
    }
861 862 863 864 865 866
    free(fullpath);

    if(strcmp(util_get_extension(uri), "m3u") == 0) {
        char *sourceuri = strdup(uri);
        char *dot = strrchr(sourceuri, '.');
        *dot = 0;
867 868
        client->respcode = 200;
        bytes = sock_write(client->con->sock,
869 870
                    "HTTP/1.0 200 OK\r\n"
                    "Content-Type: audio/x-mpegurl\r\n\r\n"
871
                    "http://%s:%d%s\r\n", 
Michael Smith's avatar
Michael Smith committed
872 873
                    host, 
                    port,
874 875
                    sourceuri
                    );
876 877
        if(bytes > 0) client->con->sent_bytes = bytes;
        client_destroy(client);
878
        free(sourceuri);
879
        if (uri != passed_uri) free (uri);
880
        free (host);
881 882
        return;
    }
883
    free (host);
884

885 886 887
    avl_tree_rlock(global.source_tree);
    source = source_find_mount(uri);
    if (source) {
888
        DEBUG0("Source found for client");
Michael Smith's avatar
Michael Smith committed
889 890 891 892 893 894 895

        /* The source may not be the requested source - it might have gone
         * via one or more fallbacks. We only reject it for no-mount if it's
         * the originally requested source
         */
        if(strcmp(uri, source->mount) == 0 && source->no_mount) {
            avl_tree_unlock(global.source_tree);
896
            client_send_404(client, "This mount is unavailable.");
897
            if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
898
            return;
899
        }
900
        if (source->running == 0 && source->on_demand == 0)
901 902 903 904
        {
            avl_tree_unlock(global.source_tree);
            DEBUG0("inactive source, client dropped");
            client_send_404(client, "This mount is unavailable.");
905
            if (uri != passed_uri) free (uri);
906
            return;
Michael Smith's avatar
Michael Smith committed
907 908 909 910
        }

        /* Check for any required authentication first */
        if(source->authenticator != NULL) {
911 912
            ret = auth_check_client(source, client);
            if(ret != AUTH_OK) {
913
                avl_tree_unlock(global.source_tree);
914 915 916 917 918 919 920 921
                if (ret == AUTH_FORBIDDEN) {
                    INFO1("Client attempted to log multiple times to source "
                        "(\"%s\")", uri);
                    client_send_403(client);
                }
                else {
                /* If not FORBIDDEN, default to 401 */
                    INFO1("Client attempted to log in to source (\"%s\")with "
Michael Smith's avatar
Michael Smith committed
922
                        "incorrect or missing password", uri);
923 924
                    client_send_401(client);
                }
925
                if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
926 927 928 929
                return;
            }
        }

930
        global_lock();
Michael Smith's avatar
Michael Smith committed
931 932 933 934
        /* Early-out for per-source max listeners. This gets checked again
         * by the source itself, later. This route gives a useful message to
         * the client, also.
         */
935
        if (source->max_listeners != -1 && 
936
                source->listeners >= (unsigned long)source->max_listeners) 
Michael Smith's avatar
Michael Smith committed
937
        {
938
            global_unlock();
Michael Smith's avatar
Michael Smith committed
939
            avl_tree_unlock(global.source_tree);
940 941
            client_send_404(client, 
                    "Too many clients on this mountpoint. Try again later.");
942
            if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
943 944
            return;
        }
945 946 947
        global_unlock();
                        
        sock_set_blocking(client->con->sock, SOCK_NONBLOCK);
948
        sock_set_nodelay(client->con->sock);
Karl Heyes's avatar
Karl Heyes committed
949

950 951 952 953
        client->write_to_client = format_generic_write_to_client;
        client->check_buffer = format_check_http_buffer;
        client->refbuf = refbuf_new (4096);

954 955 956
        avl_tree_wlock(source->pending_tree);
        avl_insert(source->pending_tree, (void *)client);
        avl_tree_unlock(source->pending_tree);
957
        stats_event_inc (NULL, "listener_connections");
958 959 960 961 962 963 964 965

        if (source->running == 0 && source->on_demand)
        {
            /* enable on-demand relay to start, wake up the slave thread */
            DEBUG0("kicking off on-demand relay");
            source->on_demand_req = 1;
            slave_rescan ();
        }
966 967 968 969 970
    }
                    
    avl_tree_unlock(global.source_tree);
                    
    if (!source) {
971 972
        DEBUG0("Source not found for client");
        client_send_404(client, "The source you requested could not be found.");
973
    }
974
    if (uri != passed_uri) free (uri);
975 976
}

977
void _handle_shoutcast_compatible(connection_t *con, char *mount, char *source_password) {
978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018
    char shoutcast_password[256];
    char *http_compliant;
    int http_compliant_len = 0;
    char header[4096];
    http_parser_t *parser;

    memset(shoutcast_password, 0, sizeof (shoutcast_password));
    /* Step one of shoutcast auth protocol, read encoder password (1 line) */
    if (util_read_header(con->sock, shoutcast_password, 
            sizeof (shoutcast_password), 
            READ_LINE) == 0) {
        /* either we didn't get a complete line, or we timed out */
        connection_close(con);
        return;
    }
    /* Get rid of trailing \n */
    shoutcast_password[strlen(shoutcast_password)-1] = '\000';
    if (strcmp(shoutcast_password, source_password)) {
        ERROR0("Invalid source password");
        connection_close(con);
        return;
    }
    /* Step two of shoutcast auth protocol, send OK2.  For those
       interested, OK2 means it supports metadata updates via admin.cgi,
       and the string "OK" can also be sent, but will indicate to the
       shoutcast source client to not send metadata updates.
       I believe icecast 1.x used to send OK. */
    sock_write(con->sock, "%s\r\n", "OK2");

    memset(header, 0, sizeof (header));
    /* Step three of shoutcast auth protocol, read HTTP-style
       request headers and process them.*/
    if (util_read_header(con->sock, header, sizeof (header), 
                         READ_ENTIRE_HEADER) == 0) {
        /* either we didn't get a complete header, or we timed out */
        connection_close(con);
        return;
    }
    /* 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 */
1019
    http_compliant_len = strlen(header) + strlen(mount) + 20;
1020
    http_compliant = (char *)calloc(1, http_compliant_len);
1021 1022
    snprintf (http_compliant, http_compliant_len,
            "SOURCE %s HTTP/1.0\r\n%s", mount, header);
1023 1024
    parser = httpp_create_parser();
    httpp_initialize(parser, NULL);
1025 1026 1027 1028 1029 1030 1031 1032 1033
    if (httpp_parse (parser, http_compliant, strlen(http_compliant)))
    {
        client_t *client = client_create (con, parser);
        if (client)
        {
            _handle_source_request (client, mount, SHOUTCAST_SOURCE_AUTH);
            free (http_compliant);
            return;
        }
1034
    }
1035 1036 1037
    connection_close (con);
    httpp_destroy (parser);
    free (http_compliant);
1038 1039
}

1040 1041
static void *_handle_connection(void *arg)
{
1042 1043 1044
    char header[4096];
    connection_t *con;
    http_parser_t *parser;
1045
    char *rawuri, *uri;
1046
    client_t *client;
1047 1048 1049 1050
    int i = 0;
    int continue_flag = 0;
    ice_config_t *config;
    char *source_password;
Jack Moffitt's avatar
Jack Moffitt committed
1051

1052
    while (global.running == ICE_RUNNING) {
Jack Moffitt's avatar
Jack Moffitt committed
1053

1054 1055
        /* grab a connection and set the socket to blocking */
        while ((con = _get_connection())) {
Michael Smith's avatar
Michael Smith committed
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070

            /* Handle meta-connections */
            if(con->event_number > 0) {
                switch(con->event_number) {
                    case EVENT_CONFIG_READ:
                        event_config_read(con->event);
                        break;
                    default:
                        ERROR1("Unknown event number: %d", con->event_number);
                        break;
                }
                free(con);
                continue;
            }

1071
            stats_event_inc(NULL, "connections");
Jack Moffitt's avatar
Jack Moffitt committed
1072

1073
            sock_set_blocking(con->sock, SOCK_BLOCK);
Jack Moffitt's avatar
Jack Moffitt committed
1074

1075 1076 1077 1078 1079 1080
            continue_flag = 0;
            /* Check for special shoutcast compatability processing */
            for(i = 0; i < MAX_LISTEN_SOCKETS; i++) {
                if(global.serversock[i] == con->serversock) {
                    config = config_get_config();
                    if (config->listeners[i].shoutcast_compat) {
1081
                        char *shoutcast_mount = strdup (config->shoutcast_mount);
1082 1083 1084 1085 1086
                        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);
1087
                        config_release_config();
1088
                        _handle_shoutcast_compatible(con, shoutcast_mount, source_password);
1089
                        free(source_password);
1090
                        free (shoutcast_mount);
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100
                        continue_flag = 1;
                        break;
                    }
                    config_release_config();
                }
            }
            if(continue_flag) {
                continue;
            }

1101
            /* fill header with the http header */
1102
            memset(header, 0, sizeof (header));
1103 1104
            if (util_read_header(con->sock, header, sizeof (header), 
                                 READ_ENTIRE_HEADER) == 0) {
1105 1106 1107 1108
                /* either we didn't get a complete header, or we timed out */
                connection_close(con);
                continue;
            }
Jack Moffitt's avatar
Jack Moffitt committed
1109

1110 1111 1112 1113 1114 1115
            parser = httpp_create_parser();
            httpp_initialize(parser, NULL);
            if (httpp_parse(parser, header, strlen(header))) {
                /* handle the connection or something */
                
                if (strcmp("ICE",  httpp_getvar(parser, HTTPP_VAR_PROTOCOL)) &&
1116
                    strcmp("HTTP", httpp_getvar(parser, HTTPP_VAR_PROTOCOL))) {
1117
                    ERROR0("Bad HTTP protocol detected");
1118 1119 1120 1121
                    connection_close(con);
                    httpp_destroy(parser);
                    continue;
                }
Jack Moffitt's avatar
Jack Moffitt committed
1122

1123 1124 1125
                rawuri = httpp_getvar(parser, HTTPP_VAR_URI);
                uri = util_normalise_uri(rawuri);

1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
                if (uri == NULL)
                {
                    sock_write(con->sock, "The path you requested was invalid\r\n");
                    connection_close(con);
                    httpp_destroy(parser);
                    continue;
                }
                client = client_create (con, parser);
                if (client == NULL)
                {
                    sock_write (con->sock, "HTTP/1.0 404 File Not Found\r\n"
                            "Content-Type: text/html\r\n\r\n"
                            "<b>Connection limit reached</b>");
                    connection_close(con);
                    httpp_destroy(parser);
1141 1142
                    continue;
                }
1143

1144
                if (parser->req_type == httpp_req_source) {
1145
                    _handle_source_request (client, uri, ICECAST_SOURCE_AUTH);
1146 1147
                }
                else if (parser->req_type == httpp_req_stats) {
1148
                    _handle_stats_request (client, uri);
1149 1150
                }
                else if (parser->req_type == httpp_req_get) {
1151
                    _handle_get_request (client, uri);
1152 1153
                }
                else {
1154
                    ERROR0("Wrong request type from client");
1155
                    client_send_400 (client, "unknown request");
1156 1157 1158
                }

                free(uri);
1159
                continue;
1160
            } 
1161
            else {
1162
                ERROR0("HTTP request parsing failed");
1163 1164 1165 1166 1167
                connection_close(con);
                httpp_destroy(parser);
                continue;
            }
        }
1168
        thread_sleep (100000);
1169
    }
1170
    DEBUG0 ("Connection thread done");
Jack Moffitt's avatar
Jack Moffitt committed
1171

1172
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed