source: trunk/libtransmission/transmission.c @ 994

Last change on this file since 994 was 994, checked in by livings124, 15 years ago

Initial attempt at against the completeness of a specific piece.

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1/******************************************************************************
2 * $Id: transmission.c 994 2006-10-12 23:34:20Z livings124 $
3 *
4 * Copyright (c) 2005-2006 Transmission authors and contributors
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *****************************************************************************/
24
25#include "transmission.h"
26
27/***********************************************************************
28 * Local prototypes
29 **********************************************************************/
30static tr_torrent_t * torrentRealInit( tr_handle_t *, tr_torrent_t * tor,
31                                       int flags, int * error );
32static void torrentReallyStop( tr_torrent_t * );
33static void  downloadLoop( void * );
34static void  acceptLoop( void * );
35static void acceptStop( tr_handle_t * h );
36
37/***********************************************************************
38 * tr_init
39 ***********************************************************************
40 * Allocates a tr_handle_t structure and initializes a few things
41 **********************************************************************/
42tr_handle_t * tr_init()
43{
44    tr_handle_t * h;
45    int           i, r;
46
47    tr_msgInit();
48    tr_netResolveThreadInit();
49
50    h = calloc( sizeof( tr_handle_t ), 1 );
51
52    /* Generate a peer id : "-TRxxyy-" + 12 random alphanumeric
53       characters, where xx is the major version number and yy the
54       minor version number (Azureus-style) */
55    sprintf( h->id, "-TR%02d%02d-", VERSION_MAJOR, VERSION_MINOR );
56    for( i = 8; i < 20; i++ )
57    {
58        r        = tr_rand( 36 );
59        h->id[i] = ( r < 26 ) ? ( 'a' + r ) : ( '0' + r - 26 ) ;
60    }
61
62    /* Random key */
63    for( i = 0; i < 20; i++ )
64    {
65        r         = tr_rand( 36 );
66        h->key[i] = ( r < 26 ) ? ( 'a' + r ) : ( '0' + r - 26 ) ;
67    }
68
69    /* Don't exit when writing on a broken socket */
70    signal( SIGPIPE, SIG_IGN );
71
72    /* Initialize rate and file descripts controls */
73    h->upload   = tr_rcInit();
74    h->download = tr_rcInit();
75    h->fdlimit  = tr_fdInit();
76    h->choking  = tr_chokingInit( h );
77    h->natpmp   = tr_natpmpInit( h->fdlimit );
78    h->upnp     = tr_upnpInit( h->fdlimit );
79
80    h->bindPort = -1;
81    h->bindSocket = -1;
82
83    h->acceptDie = 0;
84    tr_lockInit( &h->acceptLock );
85    tr_threadCreate( &h->acceptThread, acceptLoop, h );
86
87    return h;
88}
89
90/***********************************************************************
91 * tr_setBindPort
92 ***********************************************************************
93 *
94 **********************************************************************/
95void tr_setBindPort( tr_handle_t * h, int port )
96{
97    int sock = -1;
98    tr_torrent_t * tor;
99
100    if( h->bindPort == port )
101      return;
102
103#ifndef BEOS_NETSERVER
104    /* BeOS net_server seems to be unable to set incoming connections to
105       non-blocking. Too bad. */
106    if( !tr_fdSocketWillCreate( h->fdlimit, 0 ) )
107    {
108        /* XXX should handle failure here in a better way */
109        sock = tr_netBindTCP( port );
110        if( 0 > sock)
111        {
112            tr_fdSocketClosed( h->fdlimit, 0 );
113        }
114        else
115        {   
116            tr_inf( "Bound listening port %d", port );
117            listen( sock, 5 );
118        }
119    }
120#else
121    return;
122#endif
123
124    tr_lockLock( &h->acceptLock );
125
126    h->bindPort = port;
127
128    for( tor = h->torrentList; tor; tor = tor->next )
129    {
130        tr_lockLock( &tor->lock );
131        if( NULL != tor->tracker )
132        {
133            tr_trackerChangePort( tor->tracker, port );
134        }
135        tr_lockUnlock( &tor->lock );
136    }
137
138    if( h->bindSocket > -1 )
139    {
140        tr_netClose( h->bindSocket );
141        tr_fdSocketClosed( h->fdlimit, 0 );
142    }
143
144    h->bindSocket = sock;
145
146    tr_natpmpForwardPort( h->natpmp, port );
147    tr_upnpForwardPort( h->upnp, port );
148
149    tr_lockUnlock( &h->acceptLock );
150}
151
152void tr_natTraversalEnable( tr_handle_t * h )
153{
154    tr_natpmpStart( h->natpmp );
155    tr_upnpStart( h->upnp );
156}
157
158void tr_natTraversalDisable( tr_handle_t * h )
159{
160    tr_natpmpStop( h->natpmp );
161    tr_upnpStop( h->upnp );
162}
163
164int tr_natTraversalStatus( tr_handle_t * h )
165{
166    int statuses[] = {
167        TR_NAT_TRAVERSAL_MAPPED,
168        TR_NAT_TRAVERSAL_MAPPING,
169        TR_NAT_TRAVERSAL_UNMAPPING,
170        TR_NAT_TRAVERSAL_ERROR,
171        TR_NAT_TRAVERSAL_NOTFOUND,
172        TR_NAT_TRAVERSAL_DISABLED,
173        -1,
174    };
175    int natpmp, upnp, ii;
176
177    natpmp = tr_natpmpStatus( h->natpmp );
178    upnp = tr_upnpStatus( h->upnp );
179
180    for( ii = 0; 0 <= statuses[ii]; ii++ )
181    {
182        if( statuses[ii] == natpmp || statuses[ii] == upnp )
183        {
184            return statuses[ii];
185        }
186    }
187
188    assert( 0 );
189
190    return TR_NAT_TRAVERSAL_ERROR;
191}
192
193/***********************************************************************
194 * tr_setUploadLimit
195 ***********************************************************************
196 *
197 **********************************************************************/
198void tr_setUploadLimit( tr_handle_t * h, int limit )
199{
200    tr_rcSetLimit( h->upload, limit );
201    tr_chokingSetLimit( h->choking, limit );
202}
203
204/***********************************************************************
205 * tr_setDownloadLimit
206 ***********************************************************************
207 *
208 **********************************************************************/
209void tr_setDownloadLimit( tr_handle_t * h, int limit )
210{
211    tr_rcSetLimit( h->download, limit );
212}
213
214/***********************************************************************
215 * tr_torrentRates
216 ***********************************************************************
217 *
218 **********************************************************************/
219void tr_torrentRates( tr_handle_t * h, float * dl, float * ul )
220{
221    tr_torrent_t * tor;
222
223    *dl = 0.0;
224    *ul = 0.0;
225    for( tor = h->torrentList; tor; tor = tor->next )
226    {
227        tr_lockLock( &tor->lock );
228        if( tor->status & TR_STATUS_DOWNLOAD )
229            *dl += tr_rcRate( tor->download );
230        *ul += tr_rcRate( tor->upload );
231        tr_lockUnlock( &tor->lock );
232    }
233}
234
235tr_torrent_t * tr_torrentInit( tr_handle_t * h, const char * path,
236                               int flags, int * error )
237{
238    tr_torrent_t  * tor = calloc( sizeof( tr_torrent_t ), 1 );
239    int             saveCopy = ( TR_FSAVEPRIVATE & flags );
240
241    /* Parse torrent file */
242    if( tr_metainfoParse( &tor->info, path, NULL, saveCopy ) )
243    {
244        *error = TR_EINVALID;
245        free( tor );
246        return NULL;
247    }
248
249    return torrentRealInit( h, tor, flags, error );
250}
251
252tr_torrent_t * tr_torrentInitSaved( tr_handle_t * h, const char * hashStr,
253                                    int flags, int * error )
254{
255    tr_torrent_t  * tor = calloc( sizeof( tr_torrent_t ), 1 );
256
257    /* Parse torrent file */
258    if( tr_metainfoParse( &tor->info, NULL, hashStr, 0 ) )
259    {
260        *error = TR_EINVALID;
261        free( tor );
262        return NULL;
263    }
264
265    return torrentRealInit( h, tor, ( TR_FSAVEPRIVATE | flags ), error );
266}
267
268/***********************************************************************
269 * tr_torrentInit
270 ***********************************************************************
271 * Allocates a tr_torrent_t structure, then relies on tr_metainfoParse
272 * to fill it.
273 **********************************************************************/
274static tr_torrent_t * torrentRealInit( tr_handle_t * h, tr_torrent_t * tor,
275                                       int flags, int * error )
276{
277    tr_torrent_t  * tor_tmp;
278    tr_info_t     * inf;
279    int             i;
280    char          * s1, * s2;
281
282    inf        = &tor->info;
283    inf->flags = flags;
284
285    /* Make sure this torrent is not already open */
286    for( tor_tmp = h->torrentList; tor_tmp; tor_tmp = tor_tmp->next )
287    {
288        if( !memcmp( tor->info.hash, tor_tmp->info.hash,
289                     SHA_DIGEST_LENGTH ) )
290        {
291            *error = TR_EDUPLICATE;
292            free( inf->pieces );
293            free( inf->files );
294            free( tor );
295            return NULL;
296        }
297    }
298
299    tor->status = TR_STATUS_PAUSE;
300    tor->id     = h->id;
301    tor->key    = h->key;
302    tor->bindPort = &h->bindPort;
303        tor->finished = 0;
304
305
306    /* Guess scrape URL */
307    s1 = strchr( inf->trackerAnnounce, '/' );
308    while( ( s2 = strchr( s1 + 1, '/' ) ) )
309    {
310        s1 = s2;
311    }
312    s1++;
313    if( !strncmp( s1, "announce", 8 ) )
314    {
315        int pre  = (long) s1 - (long) inf->trackerAnnounce;
316        int post = strlen( inf->trackerAnnounce ) - pre - 8;
317        memcpy( tor->scrape, inf->trackerAnnounce, pre );
318        sprintf( &tor->scrape[pre], "scrape" );
319        memcpy( &tor->scrape[pre+6], &inf->trackerAnnounce[pre+8], post );
320    }
321
322    /* Escaped info hash for HTTP queries */
323    for( i = 0; i < SHA_DIGEST_LENGTH; i++ )
324    {
325        sprintf( &tor->hashString[3*i], "%%%02x", inf->hash[i] );
326    }
327
328    /* Block size: usually 16 ko, or less if we have to */
329    tor->blockSize  = MIN( inf->pieceSize, 1 << 14 );
330    tor->blockCount = ( inf->totalSize + tor->blockSize - 1 ) /
331                        tor->blockSize;
332    tor->completion = tr_cpInit( tor );
333
334    tr_lockInit( &tor->lock );
335
336    tor->globalUpload   = h->upload;
337    tor->globalDownload = h->download;
338    tor->fdlimit        = h->fdlimit;
339    tor->upload         = tr_rcInit();
340    tor->download       = tr_rcInit();
341    tor->swarmspeed     = tr_rcInit();
342 
343    /* We have a new torrent */
344    tr_lockLock( &h->acceptLock );
345    tor->prev = NULL;
346    tor->next = h->torrentList;
347    if( tor->next )
348    {
349        tor->next->prev = tor;
350    }
351    h->torrentList = tor;
352    (h->torrentCount)++;
353    tr_lockUnlock( &h->acceptLock );
354
355    if( 0 > h->bindPort )
356    {
357        tr_setBindPort( h, TR_DEFAULT_PORT );
358    }
359
360    return tor;
361}
362
363tr_info_t * tr_torrentInfo( tr_torrent_t * tor )
364{
365    return &tor->info;
366}
367
368/***********************************************************************
369 * tr_torrentScrape
370 **********************************************************************/
371int tr_torrentScrape( tr_torrent_t * tor, int * s, int * l )
372{
373    return tr_trackerScrape( tor, s, l );
374}
375
376void tr_torrentSetFolder( tr_torrent_t * tor, const char * path )
377{
378    tor->destination = strdup( path );
379    tr_ioLoadResume( tor );
380}
381
382char * tr_torrentGetFolder( tr_torrent_t * tor )
383{
384    return tor->destination;
385}
386
387void tr_torrentStart( tr_torrent_t * tor )
388{
389    if( tor->status & ( TR_STATUS_STOPPING | TR_STATUS_STOPPED ) )
390    {
391        /* Join the thread first */
392        torrentReallyStop( tor );
393    }
394
395    tor->downloadedPrev += tor->downloadedCur;
396    tor->downloadedCur   = 0;
397    tor->uploadedPrev   += tor->uploadedCur;
398    tor->uploadedCur     = 0;
399
400    tor->status  = TR_STATUS_CHECK;
401    tor->tracker = tr_trackerInit( tor );
402
403    tor->date = tr_date();
404    tor->die = 0;
405    tr_threadCreate( &tor->thread, downloadLoop, tor );
406}
407
408void tr_torrentStop( tr_torrent_t * tor )
409{
410    tr_lockLock( &tor->lock );
411    tr_trackerStopped( tor->tracker );
412    tr_rcReset( tor->download );
413    tr_rcReset( tor->upload );
414    tr_rcReset( tor->swarmspeed );
415    tor->status = TR_STATUS_STOPPING;
416    tor->stopDate = tr_date();
417    tr_lockUnlock( &tor->lock );
418}
419
420/***********************************************************************
421 * torrentReallyStop
422 ***********************************************************************
423 * Joins the download thread and frees/closes everything related to it.
424 **********************************************************************/
425static void torrentReallyStop( tr_torrent_t * tor )
426{
427    tor->die = 1;
428    tr_threadJoin( &tor->thread );
429    tr_dbg( "Thread joined" );
430
431    tr_trackerClose( tor->tracker );
432    tor->tracker = NULL;
433
434    while( tor->peerCount > 0 )
435    {
436        tr_peerRem( tor, 0 );
437    }
438}
439
440/***********************************************************************
441 * tr_torrentCount
442 ***********************************************************************
443 *
444 **********************************************************************/
445int tr_torrentCount( tr_handle_t * h )
446{
447    return h->torrentCount;
448}
449
450void tr_torrentIterate( tr_handle_t * h, tr_callback_t func, void * d )
451{
452    tr_torrent_t * tor, * next;
453
454    for( tor = h->torrentList; tor; tor = next )
455    {
456        next = tor->next;
457        func( tor, d );
458    }
459}
460
461int tr_getFinished( tr_torrent_t * tor )
462{
463    if( tor->finished )
464    {
465        tor->finished = 0;
466        return 1;
467    }
468    return 0;
469}
470
471tr_stat_t * tr_torrentStat( tr_torrent_t * tor )
472{
473    tr_stat_t * s;
474    tr_peer_t * peer;
475    tr_info_t * inf = &tor->info;
476    int i;
477
478    tor->statCur = ( tor->statCur + 1 ) % 2;
479    s = &tor->stats[tor->statCur];
480
481    if( ( tor->status & TR_STATUS_STOPPED ) ||
482        ( ( tor->status & TR_STATUS_STOPPING ) &&
483          tr_date() > tor->stopDate + 60000 ) )
484    {
485        torrentReallyStop( tor );
486        tor->status = TR_STATUS_PAUSE;
487    }
488
489    tr_lockLock( &tor->lock );
490
491    s->status = tor->status;
492    s->error  = tor->error;
493    memcpy( s->trackerError, tor->trackerError,
494            sizeof( s->trackerError ) );
495
496    s->peersTotal       = 0;
497    s->peersUploading   = 0;
498    s->peersDownloading = 0;
499   
500    for( i = 0; i < tor->peerCount; i++ )
501    {
502        peer = tor->peers[i];
503   
504        if( tr_peerIsConnected( peer ) )
505        {
506            (s->peersTotal)++;
507            if( tr_peerIsUploading( peer ) )
508            {
509                (s->peersUploading)++;
510            }
511            if( tr_peerIsDownloading( peer ) )
512            {
513                (s->peersDownloading)++;
514            }
515        }
516    }
517
518    s->progress = tr_cpCompletionAsFloat( tor->completion );
519    if( tor->status & TR_STATUS_DOWNLOAD )
520    {
521        s->rateDownload = tr_rcRate( tor->download );
522    }
523    else
524    {
525        /* tr_rcRate() doesn't make the difference between 'piece'
526           messages and other messages, which causes a non-zero
527           download rate even tough we are not downloading. So we
528           force it to zero not to confuse the user. */
529        s->rateDownload = 0.0;
530    }
531    s->rateUpload = tr_rcRate( tor->upload );
532   
533    s->seeders  = tr_trackerSeeders(tor->tracker);
534    s->leechers = tr_trackerLeechers(tor->tracker);
535
536    s->swarmspeed = tr_rcRate( tor->swarmspeed );
537
538    if( s->rateDownload < 0.1 )
539    {
540        s->eta = -1;
541    }
542    else
543    {
544        s->eta = (float) ( 1.0 - s->progress ) *
545            (float) inf->totalSize / s->rateDownload / 1024.0;
546    }
547
548    s->downloaded = tor->downloadedCur + tor->downloadedPrev;
549    s->uploaded   = tor->uploadedCur   + tor->uploadedPrev;
550
551    tr_lockUnlock( &tor->lock );
552
553    return s;
554}
555
556tr_peer_stat_t * tr_torrentPeers( tr_torrent_t * tor, int * peerCount )
557{
558    tr_peer_stat_t * peers;
559
560    tr_lockLock( &tor->lock );
561
562    *peerCount = tor->peerCount;
563   
564    peers = (tr_peer_stat_t *) calloc( tor->peerCount, sizeof( tr_peer_stat_t ) );
565    if (peers != NULL)
566    {
567        tr_peer_t * peer;
568        struct in_addr * addr;
569        int i = 0;
570        for( i = 0; i < tor->peerCount; i++ )
571        {
572            peer = tor->peers[i];
573           
574            addr = tr_peerAddress( peer );
575            if( NULL != addr )
576            {
577                tr_netNtop( addr, peers[i].addr,
578                           sizeof( peers[i].addr ) );
579            }
580           
581            peers[i].client = tr_clientForId(tr_peerId(peer));
582           
583            peers[i].isConnected = tr_peerIsConnected(peer);
584            peers[i].isIncoming = tr_peerIsIncoming(peer);
585            peers[i].isDownloading = tr_peerIsDownloading(peer);
586            peers[i].isUploading = tr_peerIsUploading(peer);
587        }
588    }
589   
590    tr_lockUnlock( &tor->lock );
591   
592    return peers;
593}
594
595void tr_torrentPeersFree( tr_peer_stat_t * peers, int peerCount )
596{
597    int i;
598
599    if (peers == NULL)
600        return;
601
602    for (i = 0; i < peerCount; i++)
603        free( peers[i].client );
604
605    free( peers );
606}
607
608void tr_torrentAvailability( tr_torrent_t * tor, int8_t * tab, int size )
609{
610    int i, j, piece;
611
612    tr_lockLock( &tor->lock );
613    for( i = 0; i < size; i++ )
614    {
615        piece = i * tor->info.pieceCount / size;
616
617        if( tr_cpPieceIsComplete( tor->completion, piece ) )
618        {
619            tab[i] = -1;
620            continue;
621        }
622
623        tab[i] = 0;
624        for( j = 0; j < tor->peerCount; j++ )
625        {
626            if( tr_peerBitfield( tor->peers[j] ) &&
627                tr_bitfieldHas( tr_peerBitfield( tor->peers[j] ), piece ) )
628            {
629                (tab[i])++;
630            }
631        }
632    }
633    tr_lockUnlock( &tor->lock );
634}
635
636void tr_torrentAmountFinished( tr_torrent_t * tor, int8_t * tab, int size )
637{
638    int i, piece;
639
640    tr_lockLock( &tor->lock );
641    for( i = 0; i < size; i++ )
642    {
643        piece = i * tor->info.pieceCount / size;
644        tab[i] = tr_cpPercentBlocksInPiece( tor->completion, piece );
645    }
646    tr_lockUnlock( &tor->lock );
647}
648
649void tr_torrentRemoveSaved( tr_torrent_t * tor ) {
650    tr_metainfoRemoveSaved( tor->info.hashString );
651}
652
653/***********************************************************************
654 * tr_torrentClose
655 ***********************************************************************
656 * Frees memory allocated by tr_torrentInit.
657 **********************************************************************/
658void tr_torrentClose( tr_handle_t * h, tr_torrent_t * tor )
659{
660    tr_info_t * inf = &tor->info;
661
662    if( tor->status & ( TR_STATUS_STOPPING | TR_STATUS_STOPPED ) )
663    {
664        /* Join the thread first */
665        torrentReallyStop( tor );
666    }
667
668    tr_lockLock( &h->acceptLock );
669
670    h->torrentCount--;
671
672    tr_lockClose( &tor->lock );
673    tr_cpClose( tor->completion );
674
675    tr_rcClose( tor->upload );
676    tr_rcClose( tor->download );
677    tr_rcClose( tor->swarmspeed );
678
679    if( tor->destination )
680    {
681        free( tor->destination );
682    }
683    free( inf->pieces );
684    free( inf->files );
685
686    if( tor->prev )
687    {
688        tor->prev->next = tor->next;
689    }
690    else
691    {
692        h->torrentList = tor->next;
693    }
694    if( tor->next )
695    {
696        tor->next->prev = tor->prev;
697    }
698    free( tor );
699
700    tr_lockUnlock( &h->acceptLock );
701}
702
703void tr_close( tr_handle_t * h )
704{
705    acceptStop( h );
706    tr_natpmpClose( h->natpmp );
707    tr_upnpClose( h->upnp );
708    tr_chokingClose( h->choking );
709    tr_fdClose( h->fdlimit );
710    tr_rcClose( h->upload );
711    tr_rcClose( h->download );
712    free( h );
713
714    tr_netResolveThreadClose();
715}
716
717/***********************************************************************
718 * downloadLoop
719 **********************************************************************/
720static void downloadLoop( void * _tor )
721{
722    tr_torrent_t * tor = _tor;
723    uint64_t       date1, date2;
724
725    tr_dbg( "Thread started" );
726
727#ifdef SYS_BEOS
728    /* This is required because on BeOS, SIGINT is sent to each thread,
729       which kills them not nicely */
730    signal( SIGINT, SIG_IGN );
731#endif
732
733    tr_lockLock( &tor->lock );
734
735    tr_cpReset( tor->completion );
736    tor->io     = tr_ioInit( tor );
737    tor->status = tr_cpIsSeeding( tor->completion ) ?
738                      TR_STATUS_SEED : TR_STATUS_DOWNLOAD;
739
740    while( !tor->die )
741    {
742        date1 = tr_date();
743
744        /* Are we finished ? */
745        if( ( tor->status & TR_STATUS_DOWNLOAD ) &&
746            tr_cpIsSeeding( tor->completion ) )
747        {
748            /* Done */
749            tor->status = TR_STATUS_SEED;
750                        tor->finished = 1;
751            tr_trackerCompleted( tor->tracker );
752            tr_ioSaveResume( tor->io );
753#ifndef __AMIGAOS4__
754            sync(); /* KLUDGE: all files should be closed and
755                       re-opened in read-only mode instead */
756#endif
757        }
758
759        /* Receive/send messages */
760        tr_peerPulse( tor );
761
762        /* Try to get new peers or to send a message to the tracker */
763        tr_trackerPulse( tor->tracker );
764
765        if( tor->status & TR_STATUS_STOPPED )
766        {
767            break;
768        }
769
770        /* Wait up to 20 ms */
771        date2 = tr_date();
772        if( date2 < date1 + 20 )
773        {
774            tr_lockUnlock( &tor->lock );
775            tr_wait( date1 + 20 - date2 );
776            tr_lockLock( &tor->lock );
777        }
778    }
779
780    tr_lockUnlock( &tor->lock );
781
782    tr_ioClose( tor->io );
783
784    tor->status = TR_STATUS_STOPPED;
785
786    tr_dbg( "Thread exited" );
787}
788
789/***********************************************************************
790 * acceptLoop
791 **********************************************************************/
792static void acceptLoop( void * _h )
793{
794    tr_handle_t * h = _h;
795    uint64_t      date1, date2, lastchoke = 0;
796    int           ii;
797    uint8_t     * hash;
798    tr_torrent_t * tor;
799
800    tr_dbg( "Accept thread started" );
801
802#ifdef SYS_BEOS
803    /* This is required because on BeOS, SIGINT is sent to each thread,
804       which kills them not nicely */
805    signal( SIGINT, SIG_IGN );
806#endif
807
808    tr_lockLock( &h->acceptLock );
809
810    while( !h->acceptDie )
811    {
812        date1 = tr_date();
813
814        /* do NAT-PMP and UPnP pulses here since there's nowhere better */
815        tr_natpmpPulse( h->natpmp );
816        tr_upnpPulse( h->upnp );
817
818        /* Check for incoming connections */
819        if( h->bindSocket > -1 &&
820            h->acceptPeerCount < TR_MAX_PEER_COUNT &&
821            !tr_fdSocketWillCreate( h->fdlimit, 0 ) )
822        {
823            int            s;
824            struct in_addr addr;
825            in_port_t      port;
826            s = tr_netAccept( h->bindSocket, &addr, &port );
827            if( s > -1 )
828            {
829                h->acceptPeers[h->acceptPeerCount++] = tr_peerInit( addr, port, s );
830            }
831            else
832            {
833                tr_fdSocketClosed( h->fdlimit, 0 );
834            }
835        }
836
837        for( ii = 0; ii < h->acceptPeerCount; )
838        {
839            if( tr_peerRead( NULL, h->acceptPeers[ii] ) )
840            {
841                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
842                goto removePeer;
843            }
844            if( NULL != ( hash = tr_peerHash( h->acceptPeers[ii] ) ) )
845            {
846                for( tor = h->torrentList; tor; tor = tor->next )
847                {
848                    tr_lockLock( &tor->lock );
849                    if( tor->status & TR_STATUS_INACTIVE )
850                    {
851                        tr_lockUnlock( &tor->lock );
852                        continue;
853                    }
854
855                    if( 0 == memcmp( tor->info.hash, hash,
856                                     SHA_DIGEST_LENGTH ) )
857                    {
858                      tr_peerAttach( tor, h->acceptPeers[ii] );
859                      tr_lockUnlock( &tor->lock );
860                      goto removePeer;
861                    }
862                    tr_lockUnlock( &tor->lock );
863                }
864                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
865                goto removePeer;
866            }
867            if( date1 > tr_peerDate( h->acceptPeers[ii] ) + 10000 )
868            {
869                /* Give them 10 seconds to send the handshake */
870                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
871                goto removePeer;
872            }
873            ii++;
874            continue;
875           removePeer:
876            h->acceptPeerCount--;
877            memmove( &h->acceptPeers[ii], &h->acceptPeers[ii+1],
878                     ( h->acceptPeerCount - ii ) * sizeof( tr_peer_t * ) );
879        }
880
881        if( date1 > lastchoke + 2000 )
882        {
883            tr_chokingPulse( h->choking );
884            lastchoke = date1;
885        }
886
887        /* Wait up to 20 ms */
888        date2 = tr_date();
889        if( date2 < date1 + 20 )
890        {
891            tr_lockUnlock( &h->acceptLock );
892            tr_wait( date1 + 20 - date2 );
893            tr_lockLock( &h->acceptLock );
894        }
895    }
896
897    tr_lockUnlock( &h->acceptLock );
898
899    tr_dbg( "Accept thread exited" );
900}
901
902/***********************************************************************
903 * acceptStop
904 ***********************************************************************
905 * Joins the accept thread and frees/closes everything related to it.
906 **********************************************************************/
907static void acceptStop( tr_handle_t * h )
908{
909    int ii;
910
911    h->acceptDie = 1;
912    tr_threadJoin( &h->acceptThread );
913    tr_lockClose( &h->acceptLock );
914    tr_dbg( "Accept thread joined" );
915
916    for( ii = 0; ii < h->acceptPeerCount; ii++ )
917    {
918        tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
919    }
920
921    if( h->bindSocket > -1 )
922    {
923        tr_netClose( h->bindSocket );
924        tr_fdSocketClosed( h->fdlimit, 0 );
925    }
926}
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