connection.c 33.4 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>
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"
60
#include "format.h"
61
#include "format_mp3.h"
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;
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];
333
    int threadpool_size;
Jack Moffitt's avatar
Jack Moffitt committed
334

335
    config = config_get_config();
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
}

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 *mountproxy;
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;
486 487 488 489 490 491
            return -1;
        }

        global.sources++;
        global_unlock();

492 493 494
        /* set global settings first */
        source->queue_size_limit = config->queue_size_limit;
        source->timeout = config->source_timeout;
Karl Heyes's avatar
Karl Heyes committed
495
        source->burst_size = config->burst_size;
496

497 498 499 500 501 502
        /* 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)
503
        {
504
            source->client = client_create (source->con, source->parser);
505 506 507 508 509 510 511 512 513 514 515 516 517
            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;
            }
        }
518

519 520 521 522
        mountproxy = config_find_mount (config, source->mount);
        if (mountproxy)
            source_apply_mount (source, mountproxy);

523 524 525 526 527 528 529
        config_release_config();

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

        return 0;
    }
530
    WARN1("Request to add source when maximum source limit "
531 532 533 534 535 536 537 538 539 540 541 542
            "reached %d", global.sources);

    global_unlock();
    config_release_config();

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

    return -1;
}


543 544
static int _check_pass_http(http_parser_t *parser, 
        char *correctuser, char *correctpass)
545 546 547 548 549 550 551 552 553 554 555 556 557
{
    /* 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);
558 559 560
    if(userpass == NULL) {
        WARN1("Base64 decode of Authorization header \"%s\" failed",
                header+6);
561
        return 0;
562
    }
563 564 565 566 567 568 569 570 571 572

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

573
    if(strcmp(username, correctuser) || strcmp(password, correctpass)) {
574 575 576
        free(userpass);
        return 0;
    }
577
    free(userpass);
578 579 580 581

    return 1;
}

582 583 584 585 586 587 588 589
static int _check_pass_icy(http_parser_t *parser, char *correctpass)
{
    char *password;

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

590
    if (strcmp(password, correctpass))
591 592 593 594 595
        return 0;
    else
        return 1;
}

596
static int _check_pass_ice(http_parser_t *parser, char *correctpass)
597
{
598
    char *password;
599 600 601 602 603

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

604
    if (strcmp(password, correctpass))
605 606 607 608 609
        return 0;
    else
        return 1;
}

610
int connection_check_admin_pass(http_parser_t *parser)
611
{
612
    int ret;
613 614 615
    ice_config_t *config = config_get_config();
    char *pass = config->admin_password;
    char *user = config->admin_username;
616
    char *protocol;
617 618 619 620 621 622

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

623 624 625 626 627
    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);
628
    config_release_config();
629 630
    return ret;
}
Michael Smith's avatar
Michael Smith committed
631

632 633 634 635 636 637
int connection_check_relay_pass(http_parser_t *parser)
{
    int ret;
    ice_config_t *config = config_get_config();
    char *pass = config->relay_password;
    char *user = "relay";
638

639 640
    if(!pass || !user) {
        config_release_config();
641
        return 0;
642
    }
643

644 645 646
    ret = _check_pass_http(parser, user, pass);
    config_release_config();
    return ret;
647 648
}

649
int connection_check_source_pass(http_parser_t *parser, const char *mount)
650
{
651 652
    ice_config_t *config = config_get_config();
    char *pass = config->source_password;
653
    char *user = "source";
654
    int ret;
655
    int ice_login = config->ice_login;
656
    char *protocol;
657

658
    mount_proxy *mountinfo = config_find_mount (config, mount);
659

660 661 662 663 664 665
    if (mountinfo)
    {
        if (mountinfo->password)
            pass = mountinfo->password;
        if (mountinfo->username)
            user = mountinfo->username;
666 667 668 669
    }

    if(!pass) {
        WARN0("No source password set, rejecting source");
670
        config_release_config();
671 672 673
        return 0;
    }

674
    protocol = httpp_getvar(parser, HTTPP_VAR_PROTOCOL);
675 676 677 678 679 680 681 682 683 684 685
    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");
        }
686
    }
687
    config_release_config();
688
    return ret;
689 690
}

691

692
static void _handle_source_request (client_t *client, char *uri, int auth_style)
693
{
694
    source_t *source;
695

696
    INFO1("Source logging in at mountpoint \"%s\"", uri);
697

698 699 700 701 702 703
    if (uri[0] != '/')
    {
        WARN0 ("source mountpoint not starting with /");
        client_send_401 (client);
        return;
    }
704
    if (auth_style == ICECAST_SOURCE_AUTH) {
705 706
        if (connection_check_source_pass (client->parser, uri) == 0)
        {
707 708 709 710
            /* 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 */
711
            INFO1("Source (%s) attempted to login with invalid or missing password", uri);
712 713 714
            client_send_401(client);
            return;
        }
715
    }
716 717 718
    source = source_reserve (uri);
    if (source)
    {
719 720 721
        if (auth_style == SHOUTCAST_SOURCE_AUTH) {
            source->shoutcast_compat = 1;
        }
722
        source->client = client;
723 724
        source->parser = client->parser;
        source->con = client->con;
725 726 727 728 729 730 731 732 733 734 735 736
        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");
737
        WARN1 ("Mountpoint %s in use", uri);
738
    }
739 740
}

741

742
static void _handle_stats_request (client_t *client, char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
743
{
744
    stats_event_inc(NULL, "stats_connections");
745 746 747 748

    if (connection_check_admin_pass (client->parser) == 0)
    {
        client_send_401 (client);
749 750
        ERROR0("Bad password for stats connection");
        return;
751
    }
752

753
    stats_event_inc(NULL, "stats");
754 755

    thread_create("Stats Connection", stats_connection, (void *)client, THREAD_DETACHED);
756 757
}

758
static void _handle_get_request (client_t *client, char *passed_uri)
759 760 761
{
    char *fullpath;
    int bytes;
762 763
    struct stat statbuf;
    source_t *source;
764
    int fileserve;
765
    char *host = NULL;
766
    int port;
767
    int i;
Karl Heyes's avatar
Karl Heyes committed
768 769
    char *serverhost = NULL;
    int serverport = 0;
770
    aliases *alias;
771
    ice_config_t *config;
772
    int ret;
773
    char *uri = passed_uri;
774 775 776

    config = config_get_config();
    fileserve = config->fileserve;
777 778
    if (config->hostname)
        host = strdup (config->hostname);
779
    port = config->port;
780
    for(i = 0; i < global.server_sockets; i++) {
781
        if(global.serversock[i] == client->con->serversock) {
782 783 784 785 786 787
            serverhost = config->listeners[i].bind_address;
            serverport = config->listeners[i].port;
            break;
        }
    }
    alias = config->aliases;
788

789 790 791
    /* 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
792
    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
793
    ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
794 795 796 797
    ** we need to handle the latter two before the former, as the latter two
    ** aren't subject to the limits.
    */
    /* TODO: add GUID-xxxxxx */
798

799 800 801
    /* 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))) {
802 803
            uri = strdup (alias->destination);
            DEBUG2 ("alias has made %s into %s", passed_uri, uri);
804 805 806 807
            break;
        }
        alias = alias->next;
    }
808 809 810
    config_release_config();

    stats_event_inc(NULL, "client_connections");
811

812
    /* Dispatch all admin requests */
813 814
    if ((strcmp(uri, "/admin.cgi") == 0) ||
        (strncmp(uri, "/admin/", 7) == 0)) {
815
        admin_handle_request(client, uri);
816
        if (uri != passed_uri) free (uri);
817
        free (host);
Michael Smith's avatar
Michael Smith committed
818 819 820
        return;
    }

821 822 823 824
    /* Here we are parsing the URI request to see
    ** if the extension is .xsl, if so, then process
    ** this request as an XSLT request
    */
825 826
    fullpath = util_get_path_from_normalised_uri(uri);
    if (util_check_valid_extension(fullpath) == XSLT_CONTENT) {
827 828
        /* If the file exists, then transform it, otherwise, write a 404 */
        if (stat(fullpath, &statbuf) == 0) {
829
            DEBUG0("Stats request, sending XSL transformed stats");
830
            client->respcode = 200;
831
            bytes = sock_write(client->con->sock, 
832 833 834
                    "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);
835 836 837
            client_destroy(client);
        }
        else {
838
            client_send_404(client, "The file you requested could not be found");
839
        }
840
        free(fullpath);
841
        if (uri != passed_uri) free (uri);
842
        free (host);
843
        return;
844
    }
845
    else if(fileserve && stat(fullpath, &statbuf) == 0 && 
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
846
#ifdef _WIN32
847
            ((statbuf.st_mode) & _S_IFREG))
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
848
#else
849
            S_ISREG(statbuf.st_mode)) 
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
850
#endif
851
    {
852
        fserve_client_create(client, fullpath);
853
        free(fullpath);
854
        if (uri != passed_uri) free (uri);
855
        free (host);
856 857
        return;
    }
858 859 860 861 862 863
    free(fullpath);

    if(strcmp(util_get_extension(uri), "m3u") == 0) {
        char *sourceuri = strdup(uri);
        char *dot = strrchr(sourceuri, '.');
        *dot = 0;
864 865
        client->respcode = 200;
        bytes = sock_write(client->con->sock,
866 867
                    "HTTP/1.0 200 OK\r\n"
                    "Content-Type: audio/x-mpegurl\r\n\r\n"
868
                    "http://%s:%d%s\r\n", 
869 870
                    host, 
                    port,
871 872
                    sourceuri
                    );
873 874
        if(bytes > 0) client->con->sent_bytes = bytes;
        client_destroy(client);
875
        free(sourceuri);
876
        if (uri != passed_uri) free (uri);
877
        free (host);
878 879
        return;
    }
880
    free (host);
881

882 883 884
    avl_tree_rlock(global.source_tree);
    source = source_find_mount(uri);
    if (source) {
885
        DEBUG0("Source found for client");
Michael Smith's avatar
Michael Smith committed
886 887 888 889 890 891 892

        /* 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);
893
            client_send_404(client, "This mount is unavailable.");
894
            if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
895
            return;
896 897 898 899 900 901
        }
        if (source->running == 0)
        {
            avl_tree_unlock(global.source_tree);
            DEBUG0("inactive source, client dropped");
            client_send_404(client, "This mount is unavailable.");
902
            if (uri != passed_uri) free (uri);
903
            return;
Michael Smith's avatar
Michael Smith committed
904 905 906 907
        }

        /* Check for any required authentication first */
        if(source->authenticator != NULL) {
908 909
            ret = auth_check_client(source, client);
            if(ret != AUTH_OK) {
910
                avl_tree_unlock(global.source_tree);
911 912 913 914 915 916 917 918
                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
919
                        "incorrect or missing password", uri);
920 921
                    client_send_401(client);
                }
922
                if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
923 924 925 926
                return;
            }
        }

927
        global_lock();
Michael Smith's avatar
Michael Smith committed
928 929 930 931
        /* 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.
         */
932
        if (source->max_listeners != -1 && 
Michael Smith's avatar
Michael Smith committed
933 934
                source->listeners >= source->max_listeners) 
        {
935
            global_unlock();
Michael Smith's avatar
Michael Smith committed
936
            avl_tree_unlock(global.source_tree);
937 938
            client_send_404(client, 
                    "Too many clients on this mountpoint. Try again later.");
939
            if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
940 941
            return;
        }
942 943
        global_unlock();
                        
Karl Heyes's avatar
Karl Heyes committed
944
        source->format->create_client_data (source, client);
945 946

        source->format->client_send_headers(source->format, source, client);
947 948
                        
        bytes = sock_write(client->con->sock, "\r\n");
949
        if(bytes > 0) client->con->sent_bytes += bytes;
950 951
                            
        sock_set_blocking(client->con->sock, SOCK_NONBLOCK);
952
        sock_set_nodelay(client->con->sock);
953 954 955 956 957 958 959 960 961
                        
        avl_tree_wlock(source->pending_tree);
        avl_insert(source->pending_tree, (void *)client);
        avl_tree_unlock(source->pending_tree);
    }
                    
    avl_tree_unlock(global.source_tree);
                    
    if (!source) {
962 963
        DEBUG0("Source not found for client");
        client_send_404(client, "The source you requested could not be found.");
964
    }
965
    if (uri != passed_uri) free (uri);
966 967
}

968
void _handle_shoutcast_compatible(connection_t *con, char *mount, char *source_password) {
969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009
    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 */
1010
    http_compliant_len = strlen(header) + strlen(mount) + 20;
1011
    http_compliant = (char *)calloc(1, http_compliant_len);
1012 1013
    snprintf (http_compliant, http_compliant_len,
            "SOURCE %s HTTP/1.0\r\n%s", mount, header);
1014 1015
    parser = httpp_create_parser();
    httpp_initialize(parser, NULL);
1016 1017 1018 1019 1020 1021 1022 1023 1024
    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;
        }
1025
    }
1026 1027 1028
    connection_close (con);
    httpp_destroy (parser);
    free (http_compliant);
1029 1030
}

1031 1032
static void *_handle_connection(void *arg)
{
1033 1034 1035
    char header[4096];
    connection_t *con;
    http_parser_t *parser;
1036
    char *rawuri, *uri;
1037
    client_t *client;
1038 1039 1040 1041
    int i = 0;
    int continue_flag = 0;
    ice_config_t *config;
    char *source_password;
Jack Moffitt's avatar
Jack Moffitt committed
1042

1043
    while (global.running == ICE_RUNNING) {
Jack Moffitt's avatar
Jack Moffitt committed
1044

1045 1046
        /* grab a connection and set the socket to blocking */
        while ((con = _get_connection())) {
1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061

            /* 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;
            }

1062
            stats_event_inc(NULL, "connections");
Jack Moffitt's avatar
Jack Moffitt committed
1063

1064
            sock_set_blocking(con->sock, SOCK_BLOCK);
Jack Moffitt's avatar
Jack Moffitt committed
1065

1066 1067 1068 1069 1070 1071
            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) {
1072
                        char *shoutcast_mount = strdup (config->shoutcast_mount);
1073 1074 1075 1076 1077
                        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);
1078
                        config_release_config();
1079
                        _handle_shoutcast_compatible(con, shoutcast_mount, source_password);
1080
                        free(source_password);
1081
                        free (shoutcast_mount);
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
                        continue_flag = 1;
                        break;
                    }
                    config_release_config();
                }
            }
            if(continue_flag) {
                continue;
            }

1092
            /* fill header with the http header */
1093
            memset(header, 0, sizeof (header));
1094 1095
            if (util_read_header(con->sock, header, sizeof (header), 
                                 READ_ENTIRE_HEADER) == 0) {
1096 1097 1098 1099
                /* either we didn't get a complete header, or we timed out */
                connection_close(con);
                continue;
            }
Jack Moffitt's avatar
Jack Moffitt committed
1100

1101 1102 1103 1104 1105 1106
            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)) &&
1107
                    strcmp("HTTP", httpp_getvar(parser, HTTPP_VAR_PROTOCOL))) {
1108
                    ERROR0("Bad HTTP protocol detected");
1109 1110 1111 1112
                    connection_close(con);
                    httpp_destroy(parser);
                    continue;
                }
Jack Moffitt's avatar
Jack Moffitt committed
1113

1114 1115 1116
                rawuri = httpp_getvar(parser, HTTPP_VAR_URI);
                uri = util_normalise_uri(rawuri);

1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
                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);
1132 1133
                    continue;
                }
1134

1135
                if (parser->req_type == httpp_req_source) {
1136
                    _handle_source_request (client, uri, ICECAST_SOURCE_AUTH);
1137 1138
                }
                else if (parser->req_type == httpp_req_stats) {
1139
                    _handle_stats_request (client, uri);
1140 1141
                }
                else if (parser->req_type == httpp_req_get) {
1142
                    _handle_get_request (client, uri);
1143 1144
                }
                else {
1145
                    ERROR0("Wrong request type from client");
1146
                    client_send_400 (client, "unknown request");
1147 1148 1149
                }

                free(uri);
1150
                continue;
1151
            } 
1152
            else {
1153
                ERROR0("HTTP request parsing failed");
1154 1155 1156 1157 1158
                connection_close(con);
                httpp_destroy(parser);
                continue;
            }
        }
1159
        thread_sleep (100000);
1160
    }
1161
    DEBUG0 ("Connection thread done");
Jack Moffitt's avatar
Jack Moffitt committed
1162

1163
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
1164 1165 1166 1167
}

void connection_close(connection_t *con)
{
1168 1169 1170 1171
    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
1172
}