connection.c 33.3 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
 */
442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471
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;
        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
        {
472
            WARN0("No content-type header, falling back to backwards compatibility mode "
473
                    "for icecast 1.x relays. Assuming content is mp3.");
474
            format_type = FORMAT_TYPE_GENERIC;
475 476
        }

Karl Heyes's avatar
Karl Heyes committed
477
        if (format_get_plugin (format_type, source) < 0)
478 479 480 481 482 483
        {
            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);
484
            source->client = NULL;
485 486 487 488 489 490
            return -1;
        }

        global.sources++;
        global_unlock();

491 492 493
        /* set global settings first */
        source->queue_size_limit = config->queue_size_limit;
        source->timeout = config->source_timeout;
Karl Heyes's avatar
Karl Heyes committed
494
        source->burst_size = config->burst_size;
495

496 497 498 499 500 501
        /* 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)
502
        {
503
            source->client = client_create (source->con, source->parser);
504 505 506 507 508 509 510 511 512 513 514 515 516
            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;
            }
        }
517

518
        source_update_settings (config, source);
519 520 521 522 523 524 525
        config_release_config();

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

        return 0;
    }
526
    WARN1("Request to add source when maximum source limit "
527 528 529 530 531 532 533 534 535 536 537 538
            "reached %d", global.sources);

    global_unlock();
    config_release_config();

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

    return -1;
}


539 540
static int _check_pass_http(http_parser_t *parser, 
        char *correctuser, char *correctpass)
541 542 543 544 545 546 547 548 549 550 551 552 553
{
    /* 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);
554 555 556
    if(userpass == NULL) {
        WARN1("Base64 decode of Authorization header \"%s\" failed",
                header+6);
557
        return 0;
558
    }
559 560 561 562 563 564 565 566 567 568

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

569
    if(strcmp(username, correctuser) || strcmp(password, correctpass)) {
570 571 572
        free(userpass);
        return 0;
    }
573
    free(userpass);
574 575 576 577

    return 1;
}

578 579 580 581 582 583 584 585
static int _check_pass_icy(http_parser_t *parser, char *correctpass)
{
    char *password;

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

586
    if (strcmp(password, correctpass))
587 588 589 590 591
        return 0;
    else
        return 1;
}

592
static int _check_pass_ice(http_parser_t *parser, char *correctpass)
593
{
594
    char *password;
595 596 597 598 599

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

600
    if (strcmp(password, correctpass))
601 602 603 604 605
        return 0;
    else
        return 1;
}

606
int connection_check_admin_pass(http_parser_t *parser)
607
{
608
    int ret;
Michael Smith's avatar
Michael Smith committed
609 610 611
    ice_config_t *config = config_get_config();
    char *pass = config->admin_password;
    char *user = config->admin_username;
612
    char *protocol;
613 614 615 616 617 618

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

619 620 621 622 623
    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
624
    config_release_config();
625 626
    return ret;
}
Michael Smith's avatar
Michael Smith committed
627

628 629 630 631 632
int connection_check_relay_pass(http_parser_t *parser)
{
    int ret;
    ice_config_t *config = config_get_config();
    char *pass = config->relay_password;
633
    char *user = config->relay_username;
Michael Smith's avatar
Michael Smith committed
634

635 636
    if(!pass || !user) {
        config_release_config();
637
        return 0;
638
    }
639

640 641 642
    ret = _check_pass_http(parser, user, pass);
    config_release_config();
    return ret;
643 644
}

645
int connection_check_source_pass(http_parser_t *parser, const char *mount)
646
{
Michael Smith's avatar
Michael Smith committed
647 648
    ice_config_t *config = config_get_config();
    char *pass = config->source_password;
649
    char *user = "source";
650
    int ret;
Michael Smith's avatar
Michael Smith committed
651
    int ice_login = config->ice_login;
652
    char *protocol;
Michael Smith's avatar
Michael Smith committed
653

654
    mount_proxy *mountinfo = config_find_mount (config, mount);
655

656 657 658 659 660 661
    if (mountinfo)
    {
        if (mountinfo->password)
            pass = mountinfo->password;
        if (mountinfo->username)
            user = mountinfo->username;
662 663 664 665
    }

    if(!pass) {
        WARN0("No source password set, rejecting source");
666
        config_release_config();
667 668 669
        return 0;
    }

670
    protocol = httpp_getvar(parser, HTTPP_VAR_PROTOCOL);
671 672 673 674 675 676 677 678 679 680 681
    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");
        }
682
    }
683
    config_release_config();
684
    return ret;
685 686
}

687

688
static void _handle_source_request (client_t *client, char *uri, int auth_style)
689
{
690
    source_t *source;
691

692
    INFO1("Source logging in at mountpoint \"%s\"", uri);
693

694 695 696 697 698 699
    if (uri[0] != '/')
    {
        WARN0 ("source mountpoint not starting with /");
        client_send_401 (client);
        return;
    }
700
    if (auth_style == ICECAST_SOURCE_AUTH) {
701 702
        if (connection_check_source_pass (client->parser, uri) == 0)
        {
703 704 705 706
            /* 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 */
707
            INFO1("Source (%s) attempted to login with invalid or missing password", uri);
708 709 710
            client_send_401(client);
            return;
        }
711
    }
712 713 714
    source = source_reserve (uri);
    if (source)
    {
715 716 717
        if (auth_style == SHOUTCAST_SOURCE_AUTH) {
            source->shoutcast_compat = 1;
        }
718
        source->client = client;
719 720
        source->parser = client->parser;
        source->con = client->con;
721 722 723 724 725 726 727 728 729 730 731 732
        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");
733
        WARN1 ("Mountpoint %s in use", uri);
734
    }
735 736
}

737

738
static void _handle_stats_request (client_t *client, char *uri)
Jack Moffitt's avatar
Jack Moffitt committed
739
{
740
    stats_event_inc(NULL, "stats_connections");
741 742 743 744

    if (connection_check_admin_pass (client->parser) == 0)
    {
        client_send_401 (client);
745 746
        ERROR0("Bad password for stats connection");
        return;
747
    }
748

749
    stats_event_inc(NULL, "stats");
750 751

    thread_create("Stats Connection", stats_connection, (void *)client, THREAD_DETACHED);
752 753
}

754
static void _handle_get_request (client_t *client, char *passed_uri)
755 756 757
{
    char *fullpath;
    int bytes;
758 759
    struct stat statbuf;
    source_t *source;
Michael Smith's avatar
Michael Smith committed
760
    int fileserve;
761
    char *host = NULL;
Michael Smith's avatar
Michael Smith committed
762
    int port;
763
    int i;
Karl Heyes's avatar
Karl Heyes committed
764 765
    char *serverhost = NULL;
    int serverport = 0;
766
    aliases *alias;
Michael Smith's avatar
Michael Smith committed
767
    ice_config_t *config;
768
    int ret;
769
    char *uri = passed_uri;
Michael Smith's avatar
Michael Smith committed
770 771 772

    config = config_get_config();
    fileserve = config->fileserve;
773 774
    if (config->hostname)
        host = strdup (config->hostname);
Michael Smith's avatar
Michael Smith committed
775
    port = config->port;
776
    for(i = 0; i < global.server_sockets; i++) {
777
        if(global.serversock[i] == client->con->serversock) {
778 779 780 781 782 783
            serverhost = config->listeners[i].bind_address;
            serverport = config->listeners[i].port;
            break;
        }
    }
    alias = config->aliases;
784

785 786 787
    /* 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
788
    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
789
    ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
790 791 792 793
    ** we need to handle the latter two before the former, as the latter two
    ** aren't subject to the limits.
    */
    /* TODO: add GUID-xxxxxx */
794

795 796 797
    /* 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))) {
798 799
            uri = strdup (alias->destination);
            DEBUG2 ("alias has made %s into %s", passed_uri, uri);
800 801 802 803
            break;
        }
        alias = alias->next;
    }
804 805 806
    config_release_config();

    stats_event_inc(NULL, "client_connections");
807

808
    /* Dispatch all admin requests */
809 810
    if ((strcmp(uri, "/admin.cgi") == 0) ||
        (strncmp(uri, "/admin/", 7) == 0)) {
811
        admin_handle_request(client, uri);
812
        if (uri != passed_uri) free (uri);
813
        free (host);
Michael Smith's avatar
Michael Smith committed
814 815 816
        return;
    }

817 818 819 820
    /* Here we are parsing the URI request to see
    ** if the extension is .xsl, if so, then process
    ** this request as an XSLT request
    */
821 822
    fullpath = util_get_path_from_normalised_uri(uri);
    if (util_check_valid_extension(fullpath) == XSLT_CONTENT) {
823 824
        /* If the file exists, then transform it, otherwise, write a 404 */
        if (stat(fullpath, &statbuf) == 0) {
825
            DEBUG0("Stats request, sending XSL transformed stats");
826
            client->respcode = 200;
827
            bytes = sock_write(client->con->sock, 
828 829 830
                    "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);
831 832 833
            client_destroy(client);
        }
        else {
834
            client_send_404(client, "The file you requested could not be found");
835
        }
836
        free(fullpath);
837
        if (uri != passed_uri) free (uri);
838
        free (host);
839
        return;
840
    }
841
    else if(fileserve && stat(fullpath, &statbuf) == 0 && 
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
842
#ifdef _WIN32
843
            ((statbuf.st_mode) & _S_IFREG))
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
844
#else
845
            S_ISREG(statbuf.st_mode)) 
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
846
#endif
Michael Smith's avatar
Michael Smith committed
847
    {
848
        fserve_client_create(client, fullpath);
849
        free(fullpath);
850
        if (uri != passed_uri) free (uri);
851
        free (host);
852 853
        return;
    }
854 855 856 857 858 859
    free(fullpath);

    if(strcmp(util_get_extension(uri), "m3u") == 0) {
        char *sourceuri = strdup(uri);
        char *dot = strrchr(sourceuri, '.');
        *dot = 0;
860 861
        client->respcode = 200;
        bytes = sock_write(client->con->sock,
862 863
                    "HTTP/1.0 200 OK\r\n"
                    "Content-Type: audio/x-mpegurl\r\n\r\n"
864
                    "http://%s:%d%s\r\n", 
Michael Smith's avatar
Michael Smith committed
865 866
                    host, 
                    port,
867 868
                    sourceuri
                    );
869 870
        if(bytes > 0) client->con->sent_bytes = bytes;
        client_destroy(client);
871
        free(sourceuri);
872
        if (uri != passed_uri) free (uri);
873
        free (host);
874 875
        return;
    }
876
    free (host);
877

878 879 880
    avl_tree_rlock(global.source_tree);
    source = source_find_mount(uri);
    if (source) {
881
        DEBUG0("Source found for client");
Michael Smith's avatar
Michael Smith committed
882 883 884 885 886 887 888

        /* 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);
889
            client_send_404(client, "This mount is unavailable.");
890
            if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
891
            return;
892 893 894 895 896 897
        }
        if (source->running == 0)
        {
            avl_tree_unlock(global.source_tree);
            DEBUG0("inactive source, client dropped");
            client_send_404(client, "This mount is unavailable.");
898
            if (uri != passed_uri) free (uri);
899
            return;
Michael Smith's avatar
Michael Smith committed
900 901 902 903
        }

        /* Check for any required authentication first */
        if(source->authenticator != NULL) {
904 905
            ret = auth_check_client(source, client);
            if(ret != AUTH_OK) {
906
                avl_tree_unlock(global.source_tree);
907 908 909 910 911 912 913 914
                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
915
                        "incorrect or missing password", uri);
916 917
                    client_send_401(client);
                }
918
                if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
919 920 921 922
                return;
            }
        }

923
        global_lock();
Michael Smith's avatar
Michael Smith committed
924 925 926 927
        /* 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.
         */
928
        if (source->max_listeners != -1 && 
Michael Smith's avatar
Michael Smith committed
929 930
                source->listeners >= source->max_listeners) 
        {
931
            global_unlock();
Michael Smith's avatar
Michael Smith committed
932
            avl_tree_unlock(global.source_tree);
933 934
            client_send_404(client, 
                    "Too many clients on this mountpoint. Try again later.");
935
            if (uri != passed_uri) free (uri);
Michael Smith's avatar
Michael Smith committed
936 937
            return;
        }
938 939
        global_unlock();
                        
Karl Heyes's avatar
Karl Heyes committed
940
        source->format->create_client_data (source, client);
Michael Smith's avatar
Michael Smith committed
941 942

        source->format->client_send_headers(source->format, source, client);
943 944
                        
        bytes = sock_write(client->con->sock, "\r\n");
945
        if(bytes > 0) client->con->sent_bytes += bytes;
946 947
                            
        sock_set_blocking(client->con->sock, SOCK_NONBLOCK);
948
        sock_set_nodelay(client->con->sock);
949 950 951 952 953 954 955 956 957
                        
        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) {
958 959
        DEBUG0("Source not found for client");
        client_send_404(client, "The source you requested could not be found.");
960
    }
961
    if (uri != passed_uri) free (uri);
962 963
}

964
void _handle_shoutcast_compatible(connection_t *con, char *mount, char *source_password) {
965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005
    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 */
1006
    http_compliant_len = strlen(header) + strlen(mount) + 20;
1007
    http_compliant = (char *)calloc(1, http_compliant_len);
1008 1009
    snprintf (http_compliant, http_compliant_len,
            "SOURCE %s HTTP/1.0\r\n%s", mount, header);
1010 1011
    parser = httpp_create_parser();
    httpp_initialize(parser, NULL);
1012 1013 1014 1015 1016 1017 1018 1019 1020
    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;
        }
1021
    }
1022 1023 1024
    connection_close (con);
    httpp_destroy (parser);
    free (http_compliant);
1025 1026
}

1027 1028
static void *_handle_connection(void *arg)
{
1029 1030 1031
    char header[4096];
    connection_t *con;
    http_parser_t *parser;
1032
    char *rawuri, *uri;
1033
    client_t *client;
1034 1035 1036 1037
    int i = 0;
    int continue_flag = 0;
    ice_config_t *config;
    char *source_password;
Jack Moffitt's avatar
Jack Moffitt committed
1038

1039
    while (global.running == ICE_RUNNING) {
Jack Moffitt's avatar
Jack Moffitt committed
1040

1041 1042
        /* grab a connection and set the socket to blocking */
        while ((con = _get_connection())) {
Michael Smith's avatar
Michael Smith committed
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057

            /* 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;
            }

1058
            stats_event_inc(NULL, "connections");
Jack Moffitt's avatar
Jack Moffitt committed
1059

1060
            sock_set_blocking(con->sock, SOCK_BLOCK);
Jack Moffitt's avatar
Jack Moffitt committed
1061

1062 1063 1064 1065 1066 1067
            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) {
1068
                        char *shoutcast_mount = strdup (config->shoutcast_mount);
1069 1070 1071 1072 1073
                        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);
1074
                        config_release_config();
1075
                        _handle_shoutcast_compatible(con, shoutcast_mount, source_password);
1076
                        free(source_password);
1077
                        free (shoutcast_mount);
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087
                        continue_flag = 1;
                        break;
                    }
                    config_release_config();
                }
            }
            if(continue_flag) {
                continue;
            }

1088
            /* fill header with the http header */
1089
            memset(header, 0, sizeof (header));
1090 1091
            if (util_read_header(con->sock, header, sizeof (header), 
                                 READ_ENTIRE_HEADER) == 0) {
1092 1093 1094 1095
                /* either we didn't get a complete header, or we timed out */
                connection_close(con);
                continue;
            }
Jack Moffitt's avatar
Jack Moffitt committed
1096

1097 1098 1099 1100 1101 1102
            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)) &&
1103
                    strcmp("HTTP", httpp_getvar(parser, HTTPP_VAR_PROTOCOL))) {
1104
                    ERROR0("Bad HTTP protocol detected");
1105 1106 1107 1108
                    connection_close(con);
                    httpp_destroy(parser);
                    continue;
                }
Jack Moffitt's avatar
Jack Moffitt committed
1109

1110 1111 1112
                rawuri = httpp_getvar(parser, HTTPP_VAR_URI);
                uri = util_normalise_uri(rawuri);

1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
                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);
1128 1129
                    continue;
                }
1130

1131
                if (parser->req_type == httpp_req_source) {
1132
                    _handle_source_request (client, uri, ICECAST_SOURCE_AUTH);
1133 1134
                }
                else if (parser->req_type == httpp_req_stats) {
1135
                    _handle_stats_request (client, uri);
1136 1137
                }
                else if (parser->req_type == httpp_req_get) {
1138
                    _handle_get_request (client, uri);
1139 1140
                }
                else {
1141
                    ERROR0("Wrong request type from client");
1142
                    client_send_400 (client, "unknown request");
1143 1144 1145
                }

                free(uri);
1146
                continue;
1147
            } 
1148
            else {
1149
                ERROR0("HTTP request parsing failed");
1150 1151 1152 1153 1154
                connection_close(con);
                httpp_destroy(parser);
                continue;
            }
        }
1155
        thread_sleep (100000);
1156
    }
1157
    DEBUG0 ("Connection thread done");
Jack Moffitt's avatar
Jack Moffitt committed
1158

1159
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
1160 1161 1162 1163
}

void connection_close(connection_t *con)
{
1164 1165 1166 1167
    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
1168
}