stats.c 25.5 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 14 15 16
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

Jack Moffitt's avatar
Jack Moffitt committed
17 18 19 20 21
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>

Michael Smith's avatar
Michael Smith committed
22 23 24
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
Jack Moffitt's avatar
Jack Moffitt committed
25 26 27 28 29 30 31 32 33 34 35 36

#include <thread/thread.h>
#include <avl/avl.h>
#include <httpp/httpp.h>
#include <net/sock.h>

#include "connection.h"

#include "global.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
37
#include "xslt.h"
38 39
#define CATMODULE "stats"
#include "logging.h"
Jack Moffitt's avatar
Jack Moffitt committed
40

41
#ifdef _WIN32
42
#define vsnprintf _vsnprintf
43
#define snprintf _snprintf
44
#endif
Jack Moffitt's avatar
Jack Moffitt committed
45

46 47 48 49 50
#define STATS_EVENT_SET     0
#define STATS_EVENT_INC     1
#define STATS_EVENT_DEC     2
#define STATS_EVENT_ADD     3
#define STATS_EVENT_REMOVE  4
51
#define STATS_EVENT_HIDDEN  5
52

Jack Moffitt's avatar
Jack Moffitt committed
53 54
typedef struct _event_listener_tag
{
55 56
    stats_event_t **queue;
    mutex_t *mutex;
Jack Moffitt's avatar
Jack Moffitt committed
57

58
    struct _event_listener_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
59 60
} event_listener_t;

61
volatile static int _stats_running = 0;
62
static thread_type *_stats_thread_id;
63
volatile static int _stats_threads = 0;
Jack Moffitt's avatar
Jack Moffitt committed
64

65 66
static stats_t _stats;
static mutex_t _stats_mutex;
Jack Moffitt's avatar
Jack Moffitt committed
67

68
volatile static stats_event_t *_global_event_queue;
Jack Moffitt's avatar
Jack Moffitt committed
69 70
mutex_t _global_event_mutex;

71
volatile static event_listener_t *_event_listeners;
Jack Moffitt's avatar
Jack Moffitt committed
72 73 74 75 76 77 78 79 80 81 82 83


static void *_stats_thread(void *arg);
static int _compare_stats(void *a, void *b, void *arg);
static int _compare_source_stats(void *a, void *b, void *arg);
static int _free_stats(void *key);
static int _free_source_stats(void *key);
static void _add_event_to_queue(stats_event_t *event, stats_event_t **queue);
static stats_node_t *_find_node(avl_tree *tree, char *name);
static stats_source_t *_find_source(avl_tree *tree, char *source);
static void _free_event(stats_event_t *event);

84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123

/* simple helper function for creating an event */
static stats_event_t *build_event (const char *source, const char *name, const char *value)
{
    stats_event_t *event;

    event = (stats_event_t *)calloc(1, sizeof(stats_event_t));
    if (event)
    {
        if (source)
            event->source = (char *)strdup(source);
        if (name)
            event->name = (char *)strdup(name);
        if (value)
            event->value = (char *)strdup(value);
        else
            event->action = STATS_EVENT_REMOVE;
    }
    return event;
}

static void queue_global_event (stats_event_t *event)
{
    thread_mutex_lock(&_global_event_mutex);
    if (_global_event_queue == NULL)
    {
        _global_event_queue = event;
    }
    else
    {
        stats_event_t *node = (stats_event_t *)_global_event_queue;
        while (node->next)
            node = node->next;
        node->next = event;
    }
    /* DEBUG3("event added (%s, %s, %s)", event->source,
         event->name, event->value); */
    thread_mutex_unlock(&_global_event_mutex);
}

Jack Moffitt's avatar
Jack Moffitt committed
124 125
void stats_initialize()
{
126
    _event_listeners = NULL;
127

128 129 130
    /* set up global struct */
    _stats.global_tree = avl_tree_new(_compare_stats, NULL);
    _stats.source_tree = avl_tree_new(_compare_source_stats, NULL);
Jack Moffitt's avatar
Jack Moffitt committed
131

132 133
    /* set up global mutex */
    thread_mutex_create(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
134

135 136 137
    /* set up stats queues */
    _global_event_queue = NULL;
    thread_mutex_create(&_global_event_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
138

139 140 141
    /* fire off the stats thread */
    _stats_running = 1;
    _stats_thread_id = thread_create("Stats Thread", _stats_thread, NULL, THREAD_ATTACHED);
Jack Moffitt's avatar
Jack Moffitt committed
142 143 144 145
}

void stats_shutdown()
{
146
    int n;
147
    stats_event_t *event, *next;
Jack Moffitt's avatar
Jack Moffitt committed
148

149 150 151
    if(!_stats_running) /* We can't shutdown if we're not running. */
        return;

152 153 154
    /* wait for thread to exit */
    _stats_running = 0;
    thread_join(_stats_thread_id);
Jack Moffitt's avatar
Jack Moffitt committed
155

156 157 158 159 160 161 162
    /* wait for other threads to shut down */
    do {
        thread_sleep(300000);
        thread_mutex_lock(&_stats_mutex);
        n = _stats_threads;
        thread_mutex_unlock(&_stats_mutex);
    } while (n > 0);
163
    INFO0("stats thread finished");
164

165
    /* free the queues */
Jack Moffitt's avatar
Jack Moffitt committed
166

167 168
    /* destroy the queue mutexes */
    thread_mutex_destroy(&_global_event_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
169

170 171 172
    thread_mutex_destroy(&_stats_mutex);
    avl_tree_free(_stats.source_tree, _free_source_stats);
    avl_tree_free(_stats.global_tree, _free_stats);
173

174
    event = (stats_event_t *)_global_event_queue;
175 176 177 178 179
    while(event) {
        if(event->source)
            free(event->source);
        if(event->value)
            free(event->value);
180 181
        if(event->name)
            free(event->name);
182 183 184 185
        next = event->next;
        free(event);
        event = next;
    }
Jack Moffitt's avatar
Jack Moffitt committed
186 187 188 189
}

stats_t *stats_get_stats()
{
190 191 192
    /* lock global stats
    
     copy stats
Jack Moffitt's avatar
Jack Moffitt committed
193

194
     unlock global stats
Jack Moffitt's avatar
Jack Moffitt committed
195

196
     return copied stats */
Jack Moffitt's avatar
Jack Moffitt committed
197

198
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
199 200
}

201 202
/* simple name=tag stat create/update */
void stats_event(const char *source, const char *name, const char *value)
Jack Moffitt's avatar
Jack Moffitt committed
203
{
204 205
    stats_event_t *event;

206 207 208
    event = build_event (source, name, value);
    if (event)
        queue_global_event (event);
Jack Moffitt's avatar
Jack Moffitt committed
209 210
}

211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
/* make stat hidden (non-zero). name can be NULL if it applies to a whole
 * source stats tree. */
void stats_event_hidden (const char *source, const char *name, int hidden)
{
    stats_event_t *event;
    const char *str = NULL;

    if (hidden)
        str = "";
    event = build_event (source, name, str);
    if (event)
    {
        event->action = STATS_EVENT_HIDDEN;
        queue_global_event (event);
    }
}
227 228 229

/* printf style formatting for stat create/update */
void stats_event_args(const char *source, char *name, char *format, ...)
Jack Moffitt's avatar
Jack Moffitt committed
230
{
231 232
    char buf[1024];
    va_list val;
233 234 235 236
    int ret;

    if (name == NULL)
        return;
237
    va_start(val, format);
238
    ret = vsnprintf(buf, 1024, format, val);
239
    va_end(val);
Jack Moffitt's avatar
Jack Moffitt committed
240

241 242 243 244 245 246
    if (ret < 0 || (unsigned int)ret >= sizeof (buf))
    {
        WARN2 ("problem with formatting %s stat %s",
                source==NULL ? "global" : source, name);
        return;
    }
247
    stats_event(source, name, buf);
Jack Moffitt's avatar
Jack Moffitt committed
248 249 250 251
}

static char *_get_stats(char *source, char *name)
{
252 253 254
    stats_node_t *stats = NULL;
    stats_source_t *src = NULL;
    char *value = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
255

256
    thread_mutex_lock(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
257

258 259 260 261 262 263 264 265
    if (source == NULL) {
        stats = _find_node(_stats.global_tree, name);
    } else {
        src = _find_source(_stats.source_tree, source);
        if (src) {
            stats = _find_node(src->stats_tree, name);
        }
    }
Jack Moffitt's avatar
Jack Moffitt committed
266

267
    if (stats) value = (char *)strdup(stats->value);
Jack Moffitt's avatar
Jack Moffitt committed
268

269
    thread_mutex_unlock(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
270

271
    return value;
Jack Moffitt's avatar
Jack Moffitt committed
272 273
}

274 275
char *stats_get_value(char *source, char *name)
{
276
    return(_get_stats(source, name));
277
}
278 279 280

/* increase the value in the provided stat by 1 */
void stats_event_inc(const char *source, const char *name)
Jack Moffitt's avatar
Jack Moffitt committed
281
{
282 283 284 285 286 287
    stats_event_t *event = build_event (source, name, NULL);
    /* DEBUG2("%s on %s", name, source==NULL?"global":source); */
    if (event)
    {
        event->action = STATS_EVENT_INC;
        queue_global_event (event);
288
    }
Jack Moffitt's avatar
Jack Moffitt committed
289 290
}

291
void stats_event_add(const char *source, const char *name, unsigned long value)
Jack Moffitt's avatar
Jack Moffitt committed
292
{
293 294 295 296 297 298 299 300
    stats_event_t *event = build_event (source, name, NULL);
    /* DEBUG2("%s on %s", name, source==NULL?"global":source); */
    if (event)
    {
        event->value = malloc (16);
        snprintf (event->value, 16, "%ld", value);
        event->action = STATS_EVENT_ADD;
        queue_global_event (event);
301
    }
Jack Moffitt's avatar
Jack Moffitt committed
302 303
}

304 305
/* decrease the value in the provided stat by 1 */
void stats_event_dec(const char *source, const char *name)
Jack Moffitt's avatar
Jack Moffitt committed
306
{
307 308 309 310 311 312
    /* DEBUG2("%s on %s", name, source==NULL?"global":source); */
    stats_event_t *event = build_event (source, name, NULL);
    if (event)
    {
        event->action = STATS_EVENT_DEC;
        queue_global_event (event);
313
    }
Jack Moffitt's avatar
Jack Moffitt committed
314 315 316 317 318 319 320
}

/* note: you must call this function only when you have exclusive access
** to the avl_tree
*/
static stats_node_t *_find_node(avl_tree *stats_tree, char *name)
{
321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340
    stats_node_t *stats;
    avl_node *node;
    int cmp;

    /* get the root node */
    node = stats_tree->root->right;
    
    while (node) {
        stats = (stats_node_t *)node->key;
        cmp = strcmp(name, stats->name);
        if (cmp < 0) 
            node = node->left;
        else if (cmp > 0)
            node = node->right;
        else
            return stats;
    }
    
    /* didn't find it */
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
341 342 343 344 345 346 347
}

/* note: you must call this function only when you have exclusive access
** to the avl_tree
*/
static stats_source_t *_find_source(avl_tree *source_tree, char *source)
{
348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363
    stats_source_t *stats;
    avl_node *node;
    int cmp;

    /* get the root node */
    node = source_tree->root->right;
    while (node) {
        stats = (stats_source_t *)node->key;
        cmp = strcmp(source, stats->source);
        if (cmp < 0)
            node = node->left;
        else if (cmp > 0)
            node = node->right;
        else
            return stats;
    }
Jack Moffitt's avatar
Jack Moffitt committed
364

365 366
    /* didn't find it */
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
367 368 369 370
}

static stats_event_t *_copy_event(stats_event_t *event)
{
371
    stats_event_t *copy = (stats_event_t *)calloc(1, sizeof(stats_event_t));
372 373 374 375
    if (event->source) 
        copy->source = (char *)strdup(event->source);
    else
        copy->source = NULL;
376 377
    if (event->name)
        copy->name = (char *)strdup(event->name);
378 379 380 381
    if (event->value)
        copy->value = (char *)strdup(event->value);
    else
        copy->value = NULL;
382
    copy->hidden = event->hidden;
383
    copy->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
384

385
    return copy;
Jack Moffitt's avatar
Jack Moffitt committed
386 387
}

388 389 390 391 392 393

/* helper to apply specialised changes to a stats node */
static void modify_node_event (stats_node_t *node, stats_event_t *event)
{
    char *str;

394 395 396 397 398 399 400 401
    if (event->action == STATS_EVENT_HIDDEN)
    {
        if (event->value)
            node->hidden = 1;
        else
            node->hidden = 0;
        return;
    }
402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426
    if (event->action != STATS_EVENT_SET)
    {
        int value = 0;

        switch (event->action)
        {
            case STATS_EVENT_INC:
                value = atoi (node->value)+1;
                break;
            case STATS_EVENT_DEC:
                value = atoi (node->value)-1;
                break;
            case STATS_EVENT_ADD:
                value = atoi (node->value)+atoi (event->value);
                break;
            default:
                break;
        }
        str = malloc (16);
        snprintf (str, 16, "%d", value);
    }
    else
        str = (char *)strdup (event->value);
    free (node->value);
    node->value = str;
427
    DEBUG2 ("update node %s (%s)", node->name, node->value);
428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473
}


static void process_global_event (stats_event_t *event)
{
    stats_node_t *node;

    /* DEBUG3("global event %s %s %d", event->name, event->value, event->action); */
    if (event->action == STATS_EVENT_REMOVE)
    {
        /* we're deleting */
        node = _find_node(_stats.global_tree, event->name);
        if (node != NULL)
            avl_delete(_stats.global_tree, (void *)node, _free_stats);
        return;
    }
    node = _find_node(_stats.global_tree, event->name);
    if (node)
    {
        modify_node_event (node, event);
    }
    else
    {
        /* add node */
        node = (stats_node_t *)calloc(1, sizeof(stats_node_t));
        node->name = (char *)strdup(event->name);
        node->value = (char *)strdup(event->value);

        avl_insert(_stats.global_tree, (void *)node);
    }
}


static void process_source_event (stats_event_t *event)
{
    stats_source_t *snode = _find_source(_stats.source_tree, event->source);
    if (snode == NULL)
    {
        if (event->action == STATS_EVENT_REMOVE)
            return;
        snode = (stats_source_t *)calloc(1,sizeof(stats_source_t));
        if (snode == NULL)
            return;
        DEBUG1 ("new source stat %s", event->source);
        snode->source = (char *)strdup(event->source);
        snode->stats_tree = avl_tree_new(_compare_stats, NULL);
474 475 476 477
        if (event->action == STATS_EVENT_HIDDEN)
            snode->hidden = 1;
        else
            snode->hidden = 0;
478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494

        avl_insert(_stats.source_tree, (void *)snode);
    }
    if (event->name)
    {
        stats_node_t *node = _find_node(snode->stats_tree, event->name);
        if (node == NULL)
        {
            if (event->action == STATS_EVENT_REMOVE)
                return;
            /* adding node */
            if (event->value)
            {
                DEBUG2 ("new node %s (%s)", event->name, event->value);
                node = (stats_node_t *)calloc(1,sizeof(stats_node_t));
                node->name = (char *)strdup(event->name);
                node->value = (char *)strdup(event->value);
495
                node->hidden = snode->hidden;
496 497 498 499 500 501 502 503 504 505 506 507 508 509

                avl_insert(snode->stats_tree, (void *)node);
            }
            return;
        }
        if (event->action == STATS_EVENT_REMOVE)
        {
            DEBUG1 ("delete node %s", event->name);
            avl_delete(snode->stats_tree, (void *)node, _free_stats);
            return;
        }
        modify_node_event (node, event);
        return;
    }
510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525
    if (event->action == STATS_EVENT_HIDDEN)
    {
        avl_node *node = avl_get_first (snode->stats_tree);

        if (event->value)
            snode->hidden = 1;
        else
            snode->hidden = 0;
        while (node)
        {
            stats_node_t *stats = (stats_node_t*)node->key;
            stats->hidden = snode->hidden;
            node = avl_get_next (node);
        }
        return;
    }
526 527 528 529 530 531 532 533
    if (event->action == STATS_EVENT_REMOVE)
    {
        DEBUG1 ("delete source node %s", event->source);
        avl_delete(_stats.source_tree, (void *)snode, _free_source_stats);
    }
}


Jack Moffitt's avatar
Jack Moffitt committed
534 535
static void *_stats_thread(void *arg)
{
536 537 538 539
    stats_event_t *event;
    stats_event_t *copy;
    event_listener_t *listener;

540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555
    stats_event (NULL, "server", ICECAST_VERSION_STRING);

    /* global currently active stats */
    stats_event (NULL, "clients", "0");
    stats_event (NULL, "connections", "0");
    stats_event (NULL, "sources", "0");
    stats_event (NULL, "stats", "0");

    /* global accumulating stats */
    stats_event (NULL, "client_connections", "0");
    stats_event (NULL, "source_client_connections", "0");
    stats_event (NULL, "source_relay_connections", "0");
    stats_event (NULL, "source_total_connections", "0");
    stats_event (NULL, "stats_connections", "0");

    INFO0 ("stats thread started");
556 557 558
    while (_stats_running) {
        if (_global_event_queue != NULL) {
            /* grab the next event from the queue */
559 560
            thread_mutex_lock(&_global_event_mutex);
            event = (stats_event_t *)_global_event_queue;
561
            _global_event_queue = event->next;
562 563
            thread_mutex_unlock(&_global_event_mutex);

564 565 566
            event->next = NULL;

            thread_mutex_lock(&_stats_mutex);
567 568 569 570 571 572

            /* check if we are dealing with a global or source event */
            if (event->source == NULL)
                process_global_event (event);
            else
                process_source_event (event);
573 574 575
            
            /* now we have an event that's been processed into the running stats */
            /* this event should get copied to event listeners' queues */
576
            listener = (event_listener_t *)_event_listeners;
577 578 579 580 581 582 583 584 585 586 587 588 589
            while (listener) {
                copy = _copy_event(event);
                thread_mutex_lock(listener->mutex);
                _add_event_to_queue(copy, listener->queue);
                thread_mutex_unlock(listener->mutex);

                listener = listener->next;
            }

            /* now we need to destroy the event */
            _free_event(event);

            thread_mutex_unlock(&_stats_mutex);
590
            continue;
591 592
        }

593
        thread_sleep(300000);
594 595 596
    }

    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
597 598 599 600 601
}

/* you must have the _stats_mutex locked here */
static void _register_listener(stats_event_t **queue, mutex_t *mutex)
{
602 603
    event_listener_t *node;
    event_listener_t *evli = (event_listener_t *)malloc(sizeof(event_listener_t));
Jack Moffitt's avatar
Jack Moffitt committed
604

605 606 607
    evli->queue = queue;
    evli->mutex = mutex;
    evli->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
608

609 610 611
    if (_event_listeners == NULL) {
        _event_listeners = evli;
    } else {
612
        node = (event_listener_t *)_event_listeners;
613 614 615
        while (node->next) node = node->next;
        node->next = evli;
    }
Jack Moffitt's avatar
Jack Moffitt committed
616 617 618 619
}

static stats_event_t *_make_event_from_node(stats_node_t *node, char *source)
{
620 621 622 623 624 625 626 627
    stats_event_t *event = (stats_event_t *)malloc(sizeof(stats_event_t));
    
    if (source != NULL)
        event->source = (char *)strdup(source);
    else
        event->source = NULL;
    event->name = (char *)strdup(node->name);
    event->value = (char *)strdup(node->value);
628
    event->hidden = node->hidden;
629
    event->action = STATS_EVENT_SET;
630
    event->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
631

632
    return event;
Jack Moffitt's avatar
Jack Moffitt committed
633 634 635 636
}

static void _add_event_to_queue(stats_event_t *event, stats_event_t **queue)
{
637
    stats_event_t *node;
Jack Moffitt's avatar
Jack Moffitt committed
638

639 640 641 642 643 644 645
    if (*queue == NULL) {
        *queue = event;
    } else {
        node = *queue;
        while (node->next) node = node->next;
        node->next = event;
    }
Jack Moffitt's avatar
Jack Moffitt committed
646 647 648 649
}

static stats_event_t *_get_event_from_queue(stats_event_t **queue)
{
650
    stats_event_t *event;
Jack Moffitt's avatar
Jack Moffitt committed
651

652
    if (*queue == NULL) return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
653

654 655 656
    event = *queue;
    *queue = (*queue)->next;
    event->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
657

658
    return event;
Jack Moffitt's avatar
Jack Moffitt committed
659 660 661 662
}

static int _send_event_to_client(stats_event_t *event, connection_t *con)
{
663
    int ret;
Jack Moffitt's avatar
Jack Moffitt committed
664

665
    /* send data to the client!!!! */
666 667 668 669
    ret = sock_write(con->sock, "EVENT %s %s %s\n",
            (event->source != NULL) ? event->source : "global",
            event->name ? event->name : "null",
            event->value ? event->value : "null");
Jack Moffitt's avatar
Jack Moffitt committed
670

671
    return (ret == -1) ? 0 : 1;
Jack Moffitt's avatar
Jack Moffitt committed
672 673 674 675
}

void _dump_stats_to_queue(stats_event_t **queue)
{
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706
    avl_node *node;
    avl_node *node2;
    stats_event_t *event;
    stats_source_t *source;

    thread_mutex_lock(&_stats_mutex);
    /* first we fill our queue with the current stats */
    /* start with the global stats */
    node = avl_get_first(_stats.global_tree);
    while (node) {
        event = _make_event_from_node((stats_node_t *)node->key, NULL);
        _add_event_to_queue(event, queue);

        node = avl_get_next(node);
    }

    /* now the stats for each source */
    node = avl_get_first(_stats.source_tree);
    while (node) {
        source = (stats_source_t *)node->key;
        node2 = avl_get_first(source->stats_tree);
        while (node2) {
            event = _make_event_from_node((stats_node_t *)node2->key, source->source);
            _add_event_to_queue(event, queue);

            node2 = avl_get_next(node2);
        }
        
        node = avl_get_next(node);
    }
    thread_mutex_unlock(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
707 708
}

709 710 711 712 713 714
/* factoring out code for stats loops
** this function copies all stats to queue, and registers 
** the queue for all new events atomically.
** note: mutex must already be created!
*/
static void _atomic_get_and_register(stats_event_t **queue, mutex_t *mutex)
Jack Moffitt's avatar
Jack Moffitt committed
715
{
716 717 718 719
    avl_node *node;
    avl_node *node2;
    stats_event_t *event;
    stats_source_t *source;
Jack Moffitt's avatar
Jack Moffitt committed
720

721
    thread_mutex_lock(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
722

723 724 725 726 727 728 729
    /* first we fill our queue with the current stats */
    
    /* start with the global stats */
    node = avl_get_first(_stats.global_tree);
    while (node) {
        event = _make_event_from_node((stats_node_t *)node->key, NULL);
        _add_event_to_queue(event, queue);
Jack Moffitt's avatar
Jack Moffitt committed
730

731 732
        node = avl_get_next(node);
    }
Jack Moffitt's avatar
Jack Moffitt committed
733

734 735 736 737 738 739 740 741 742 743 744 745 746 747
    /* now the stats for each source */
    node = avl_get_first(_stats.source_tree);
    while (node) {
        source = (stats_source_t *)node->key;
        node2 = avl_get_first(source->stats_tree);
        while (node2) {
            event = _make_event_from_node((stats_node_t *)node2->key, source->source);
            _add_event_to_queue(event, queue);

            node2 = avl_get_next(node2);
        }
        
        node = avl_get_next(node);
    }
Jack Moffitt's avatar
Jack Moffitt committed
748

749 750
    /* now we register to receive future event notices */
    _register_listener(queue, mutex);
Jack Moffitt's avatar
Jack Moffitt committed
751

752
    thread_mutex_unlock(&_stats_mutex);
753 754 755 756
}

void *stats_connection(void *arg)
{
757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782
    stats_connection_t *statcon = (stats_connection_t *)arg;
    stats_event_t *local_event_queue = NULL;
    mutex_t local_event_mutex;
    stats_event_t *event;

    /* increment the thread count */
    thread_mutex_lock(&_stats_mutex);
    _stats_threads++;
    thread_mutex_unlock(&_stats_mutex);

    thread_mutex_create(&local_event_mutex);

    _atomic_get_and_register(&local_event_queue, &local_event_mutex);

    while (_stats_running) {
        thread_mutex_lock(&local_event_mutex);
        event = _get_event_from_queue(&local_event_queue);
        if (event != NULL) {
            if (!_send_event_to_client(event, statcon->con)) {
                _free_event(event);
                thread_mutex_unlock(&local_event_mutex);
                break;
            }
            _free_event(event);
        } else {
            thread_mutex_unlock(&local_event_mutex);
783
            thread_sleep (500000);
784 785 786 787 788 789 790 791 792 793 794 795 796
            continue;
        }
                   
        thread_mutex_unlock(&local_event_mutex);
    }

    thread_mutex_destroy(&local_event_mutex);

    thread_mutex_lock(&_stats_mutex);
    _stats_threads--;
    thread_mutex_unlock(&_stats_mutex);

    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
797 798 799
}

typedef struct _source_xml_tag {
800 801
    char *mount;
    xmlNodePtr node;
Jack Moffitt's avatar
Jack Moffitt committed
802

803
    struct _source_xml_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
804 805 806 807
} source_xml_t;

static xmlNodePtr _find_xml_node(char *mount, source_xml_t **list, xmlNodePtr root)
{
808 809 810 811 812 813 814 815 816 817 818 819
    source_xml_t *node, *node2;
    int found = 0;

    /* search for existing node */
    node = *list;
    while (node) {
        if (strcmp(node->mount, mount) == 0) {
            found = 1;
            break;
        }
        node = node->next;
    }
Jack Moffitt's avatar
Jack Moffitt committed
820

821
    if (found) return node->node;
Jack Moffitt's avatar
Jack Moffitt committed
822

823
    /* if we didn't find it, we must build it and add it to the list */
Jack Moffitt's avatar
Jack Moffitt committed
824

825 826 827 828 829 830
    /* build node */
    node = (source_xml_t *)malloc(sizeof(source_xml_t));
    node->mount = strdup(mount);
    node->node = xmlNewChild(root, NULL, "source", NULL);
    xmlSetProp(node->node, "mount", mount);
    node->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
831

832 833 834 835 836 837 838 839
    /* add node */
    if (*list == NULL) {
        *list = node;
    } else {
        node2 = *list;
        while (node2->next) node2 = node2->next;
        node2->next = node;
    }
Jack Moffitt's avatar
Jack Moffitt committed
840

841
    return node->node;
Jack Moffitt's avatar
Jack Moffitt committed
842 843
}

844 845 846 847
void stats_transform_xslt(client_t *client, char *xslpath)
{
    xmlDocPtr doc;

848
    stats_get_xml(&doc, 0);
849

850
    xslt_transform(doc, xslpath, client);
851 852 853 854

    xmlFreeDoc(doc);
}

855
void stats_get_xml(xmlDocPtr *doc, int show_hidden)
856
{
857 858 859 860 861
    stats_event_t *event;
    stats_event_t *queue;
    xmlNodePtr node, srcnode;
    source_xml_t *src_nodes = NULL;
    source_xml_t *next;
862

863 864
    queue = NULL;
    _dump_stats_to_queue(&queue);
865

866 867 868
    *doc = xmlNewDoc("1.0");
    node = xmlNewDocNode(*doc, NULL, "icestats", NULL);
    xmlDocSetRootElement(*doc, node);
869 870


871
    event = _get_event_from_queue(&queue);
872 873
    while (event)
    {
874 875 876 877 878 879 880 881 882 883 884 885
        if (event->hidden <= show_hidden)
        {
            xmlChar *name, *value;
            name = xmlEncodeEntitiesReentrant (*doc, event->name);
            value = xmlEncodeEntitiesReentrant (*doc, event->value);
            srcnode = node;
            if (event->source) {
                srcnode = _find_xml_node(event->source, &src_nodes, node);
            }
            xmlNewChild(srcnode, NULL, name, value);
            xmlFree (value);
            xmlFree (name);
886
        }
887

888 889 890
        _free_event(event);
        event = _get_event_from_queue(&queue);
    }
891

892 893 894 895 896 897
    while (src_nodes) {
        next = src_nodes->next;
        free(src_nodes->mount);
        free(src_nodes);
        src_nodes = next;
    }
898
}
Jack Moffitt's avatar
Jack Moffitt committed
899 900
void stats_sendxml(client_t *client)
{
901 902 903 904 905 906
    int bytes;
    stats_event_t *event;
    stats_event_t *queue;
    xmlDocPtr doc;
    xmlNodePtr node, srcnode;
    int len;
907
    xmlChar *buff = NULL;
908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931
    source_xml_t *snd;
    source_xml_t *src_nodes = NULL;

    queue = NULL;
    _dump_stats_to_queue(&queue);

    doc = xmlNewDoc("1.0");
    node = xmlNewDocNode(doc, NULL, "icestats", NULL);
    xmlDocSetRootElement(doc, node);


    event = _get_event_from_queue(&queue);
    while (event) {
        if (event->source == NULL) {
            xmlNewChild(node, NULL, event->name, event->value);
        } else {
            srcnode = _find_xml_node(event->source, &src_nodes, node);
            xmlNewChild(srcnode, NULL, event->name, event->value);
        }

        _free_event(event);
        event = _get_event_from_queue(&queue);
    }

932
    xmlDocDumpMemory(doc, &buff, &len);
933 934 935 936 937 938 939 940 941 942
    xmlFreeDoc(doc);
    
    client->respcode = 200;
    bytes = sock_write(client->con->sock, "HTTP/1.0 200 OK\r\n"
               "Content-Length: %d\r\n"
               "Content-Type: text/xml\r\n"
               "\r\n", len);
    if (bytes > 0) client->con->sent_bytes += bytes;
    else goto send_error;

943
    bytes = client_send_bytes (client, buff, (unsigned)len);
Jack Moffitt's avatar
Jack Moffitt committed
944 945

 send_error:
946 947 948 949 950 951 952
    while (src_nodes) {
        snd = src_nodes->next;
        free(src_nodes->mount);
        free(src_nodes);
        src_nodes = snd;
    }
    if (buff) xmlFree(buff);
Jack Moffitt's avatar
Jack Moffitt committed
953 954 955 956
}

static int _compare_stats(void *arg, void *a, void *b)
{
957 958
    stats_node_t *nodea = (stats_node_t *)a;
    stats_node_t *nodeb = (stats_node_t *)b;
Jack Moffitt's avatar
Jack Moffitt committed
959

960
    return strcmp(nodea->name, nodeb->name);
Jack Moffitt's avatar
Jack Moffitt committed
961 962 963 964
}

static int _compare_source_stats(void *arg, void *a, void *b)
{
965 966
    stats_source_t *nodea = (stats_source_t *)a;
    stats_source_t *nodeb = (stats_source_t *)b;
Jack Moffitt's avatar
Jack Moffitt committed
967

968
    return strcmp(nodea->source, nodeb->source);
Jack Moffitt's avatar
Jack Moffitt committed
969 970 971 972
}

static int _free_stats(void *key)
{
973 974 975 976 977 978
    stats_node_t *node = (stats_node_t *)key;
    free(node->value);
    free(node->name);
    free(node);
    
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
979 980 981 982
}

static int _free_source_stats(void *key)
{
983 984 985
    stats_source_t *node = (stats_source_t *)key;
    avl_tree_free(node->stats_tree, _free_stats);
    free(node->source);
986
    free(node);
Jack Moffitt's avatar
Jack Moffitt committed
987

988
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
989 990 991 992
}

static void _free_event(stats_event_t *event)
{
993 994 995 996
    if (event->source) free(event->source);
    if (event->name) free(event->name);
    if (event->value) free(event->value);
    free(event);
Jack Moffitt's avatar
Jack Moffitt committed
997
}