source: trunk/libtransmission/transmission.c @ 926

Last change on this file since 926 was 926, checked in by titer, 15 years ago

Remember whether a peer comes from an incoming or outcoming connection

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1/******************************************************************************
2 * $Id: transmission.c 926 2006-09-25 21:56:52Z titer $
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->status  = TR_STATUS_CHECK;
396    tor->tracker = tr_trackerInit( tor );
397
398    tor->date = tr_date();
399    tor->die = 0;
400    tr_threadCreate( &tor->thread, downloadLoop, tor );
401}
402
403void tr_torrentStop( tr_torrent_t * tor )
404{
405    tr_lockLock( &tor->lock );
406    tr_trackerStopped( tor->tracker );
407    tr_rcReset( tor->download );
408    tr_rcReset( tor->upload );
409    tr_rcReset( tor->swarmspeed );
410    tor->status = TR_STATUS_STOPPING;
411    tor->stopDate = tr_date();
412    tr_lockUnlock( &tor->lock );
413}
414
415/***********************************************************************
416 * torrentReallyStop
417 ***********************************************************************
418 * Joins the download thread and frees/closes everything related to it.
419 **********************************************************************/
420static void torrentReallyStop( tr_torrent_t * tor )
421{
422    tor->die = 1;
423    tr_threadJoin( &tor->thread );
424    tr_dbg( "Thread joined" );
425
426    tr_trackerClose( tor->tracker );
427    tor->tracker = NULL;
428
429    while( tor->peerCount > 0 )
430    {
431        tr_peerRem( tor, 0 );
432    }
433}
434
435/***********************************************************************
436 * tr_torrentCount
437 ***********************************************************************
438 *
439 **********************************************************************/
440int tr_torrentCount( tr_handle_t * h )
441{
442    return h->torrentCount;
443}
444
445void tr_torrentIterate( tr_handle_t * h, tr_callback_t func, void * d )
446{
447    tr_torrent_t * tor, * next;
448
449    for( tor = h->torrentList; tor; tor = next )
450    {
451        next = tor->next;
452        func( tor, d );
453    }
454}
455
456int tr_getFinished( tr_torrent_t * tor )
457{
458    if( tor->finished )
459    {
460        tor->finished = 0;
461        return 1;
462    }
463    return 0;
464}
465
466tr_stat_t * tr_torrentStat( tr_torrent_t * tor )
467{
468    tr_stat_t * s;
469    tr_peer_t * peer;
470    tr_info_t * inf = &tor->info;
471    int i;
472
473    tor->statCur = ( tor->statCur + 1 ) % 2;
474    s = &tor->stats[tor->statCur];
475
476    if( ( tor->status & TR_STATUS_STOPPED ) ||
477        ( ( tor->status & TR_STATUS_STOPPING ) &&
478          tr_date() > tor->stopDate + 60000 ) )
479    {
480        torrentReallyStop( tor );
481        tor->status = TR_STATUS_PAUSE;
482    }
483
484    tr_lockLock( &tor->lock );
485
486    s->status = tor->status;
487    s->error  = tor->error;
488    memcpy( s->trackerError, tor->trackerError,
489            sizeof( s->trackerError ) );
490
491    s->peersTotal       = 0;
492    s->peersUploading   = 0;
493    s->peersDownloading = 0;
494   
495    for( i = 0; i < tor->peerCount; i++ )
496    {
497        peer = tor->peers[i];
498   
499        if( tr_peerIsConnected( peer ) )
500        {
501            (s->peersTotal)++;
502            if( tr_peerIsUploading( peer ) )
503            {
504                (s->peersUploading)++;
505            }
506            if( tr_peerIsDownloading( peer ) )
507            {
508                (s->peersDownloading)++;
509            }
510        }
511    }
512
513    s->progress = tr_cpCompletionAsFloat( tor->completion );
514    if( tor->status & TR_STATUS_DOWNLOAD )
515    {
516        s->rateDownload = tr_rcRate( tor->download );
517    }
518    else
519    {
520        /* tr_rcRate() doesn't make the difference between 'piece'
521           messages and other messages, which causes a non-zero
522           download rate even tough we are not downloading. So we
523           force it to zero not to confuse the user. */
524        s->rateDownload = 0.0;
525    }
526    s->rateUpload = tr_rcRate( tor->upload );
527   
528    s->seeders  = tr_trackerSeeders(tor->tracker);
529    s->leechers = tr_trackerLeechers(tor->tracker);
530
531    s->swarmspeed = tr_rcRate( tor->swarmspeed );
532
533    if( s->rateDownload < 0.1 )
534    {
535        s->eta = -1;
536    }
537    else
538    {
539        s->eta = (float) ( 1.0 - s->progress ) *
540            (float) inf->totalSize / s->rateDownload / 1024.0;
541    }
542
543    s->downloaded = tor->downloaded;
544    s->uploaded   = tor->uploaded;
545
546    tr_lockUnlock( &tor->lock );
547
548    return s;
549}
550
551tr_peer_stat_t * tr_torrentPeers( tr_torrent_t * tor, int * peerCount )
552{
553    tr_peer_stat_t * peers;
554
555    tr_lockLock( &tor->lock );
556
557    *peerCount = tor->peerCount;
558   
559    peers = (tr_peer_stat_t *) calloc( tor->peerCount, sizeof( tr_peer_stat_t ) );
560    if (peers != NULL)
561    {
562        tr_peer_t * peer;
563        struct in_addr * addr;
564        int i = 0;
565        for( i = 0; i < tor->peerCount; i++ )
566        {
567            peer = tor->peers[i];
568           
569            addr = tr_peerAddress( peer );
570            if( NULL != addr )
571            {
572                tr_netNtop( addr, peers[i].addr,
573                           sizeof( peers[i].addr ) );
574            }
575           
576            peers[i].client = tr_clientForId(tr_peerId(peer));
577           
578            peers[i].isConnected = tr_peerIsConnected(peer);
579            peers[i].isIncoming = tr_peerIsIncoming(peer);
580            peers[i].isDownloading = tr_peerIsDownloading(peer);
581            peers[i].isUploading = tr_peerIsUploading(peer);
582        }
583    }
584   
585    tr_lockUnlock( &tor->lock );
586   
587    return peers;
588}
589
590void tr_torrentPeersFree( tr_peer_stat_t * peers, int peerCount )
591{
592    int i;
593
594    if (peers == NULL)
595        return;
596
597    for (i = 0; i < peerCount; i++)
598        free( peers[i].client );
599
600    free( peers );
601}
602
603void tr_torrentAvailability( tr_torrent_t * tor, int8_t * tab, int size )
604{
605    int i, j, piece;
606
607    tr_lockLock( &tor->lock );
608    for( i = 0; i < size; i++ )
609    {
610        piece = i * tor->info.pieceCount / size;
611
612        if( tr_cpPieceIsComplete( tor->completion, piece ) )
613        {
614            tab[i] = -1;
615            continue;
616        }
617
618        tab[i] = 0;
619        for( j = 0; j < tor->peerCount; j++ )
620        {
621            if( tr_peerBitfield( tor->peers[j] ) &&
622                tr_bitfieldHas( tr_peerBitfield( tor->peers[j] ), piece ) )
623            {
624                (tab[i])++;
625            }
626        }
627    }
628    tr_lockUnlock( &tor->lock );
629}
630
631void tr_torrentRemoveSaved( tr_torrent_t * tor ) {
632    tr_metainfoRemoveSaved( tor->info.hashString );
633}
634
635/***********************************************************************
636 * tr_torrentClose
637 ***********************************************************************
638 * Frees memory allocated by tr_torrentInit.
639 **********************************************************************/
640void tr_torrentClose( tr_handle_t * h, tr_torrent_t * tor )
641{
642    tr_info_t * inf = &tor->info;
643
644    if( tor->status & ( TR_STATUS_STOPPING | TR_STATUS_STOPPED ) )
645    {
646        /* Join the thread first */
647        torrentReallyStop( tor );
648    }
649
650    tr_lockLock( &h->acceptLock );
651
652    h->torrentCount--;
653
654    tr_lockClose( &tor->lock );
655    tr_cpClose( tor->completion );
656
657    tr_rcClose( tor->upload );
658    tr_rcClose( tor->download );
659    tr_rcClose( tor->swarmspeed );
660
661    if( tor->destination )
662    {
663        free( tor->destination );
664    }
665    free( inf->pieces );
666    free( inf->files );
667
668    if( tor->prev )
669    {
670        tor->prev->next = tor->next;
671    }
672    else
673    {
674        h->torrentList = tor->next;
675    }
676    if( tor->next )
677    {
678        tor->next->prev = tor->prev;
679    }
680    free( tor );
681
682    tr_lockUnlock( &h->acceptLock );
683}
684
685void tr_close( tr_handle_t * h )
686{
687    acceptStop( h );
688    tr_natpmpClose( h->natpmp );
689    tr_upnpClose( h->upnp );
690    tr_chokingClose( h->choking );
691    tr_fdClose( h->fdlimit );
692    tr_rcClose( h->upload );
693    tr_rcClose( h->download );
694    free( h );
695
696    tr_netResolveThreadClose();
697}
698
699/***********************************************************************
700 * downloadLoop
701 **********************************************************************/
702static void downloadLoop( void * _tor )
703{
704    tr_torrent_t * tor = _tor;
705    uint64_t       date1, date2;
706
707    tr_dbg( "Thread started" );
708
709#ifdef SYS_BEOS
710    /* This is required because on BeOS, SIGINT is sent to each thread,
711       which kills them not nicely */
712    signal( SIGINT, SIG_IGN );
713#endif
714
715    tr_lockLock( &tor->lock );
716
717    tr_cpReset( tor->completion );
718    tor->io     = tr_ioInit( tor );
719    tor->status = tr_cpIsSeeding( tor->completion ) ?
720                      TR_STATUS_SEED : TR_STATUS_DOWNLOAD;
721
722    while( !tor->die )
723    {
724        date1 = tr_date();
725
726        /* Are we finished ? */
727        if( ( tor->status & TR_STATUS_DOWNLOAD ) &&
728            tr_cpIsSeeding( tor->completion ) )
729        {
730            /* Done */
731            tor->status = TR_STATUS_SEED;
732                        tor->finished = 1;
733            tr_trackerCompleted( tor->tracker );
734            tr_ioSaveResume( tor->io );
735#ifndef __AMIGAOS4__
736            sync(); /* KLUDGE: all files should be closed and
737                       re-opened in read-only mode instead */
738#endif
739        }
740
741        /* Receive/send messages */
742        tr_peerPulse( tor );
743
744        /* Try to get new peers or to send a message to the tracker */
745        tr_trackerPulse( tor->tracker );
746
747        if( tor->status & TR_STATUS_STOPPED )
748        {
749            break;
750        }
751
752        /* Wait up to 20 ms */
753        date2 = tr_date();
754        if( date2 < date1 + 20 )
755        {
756            tr_lockUnlock( &tor->lock );
757            tr_wait( date1 + 20 - date2 );
758            tr_lockLock( &tor->lock );
759        }
760    }
761
762    tr_lockUnlock( &tor->lock );
763
764    tr_ioClose( tor->io );
765
766    tor->status = TR_STATUS_STOPPED;
767
768    tr_dbg( "Thread exited" );
769}
770
771/***********************************************************************
772 * acceptLoop
773 **********************************************************************/
774static void acceptLoop( void * _h )
775{
776    tr_handle_t * h = _h;
777    uint64_t      date1, date2, lastchoke = 0;
778    int           ii;
779    uint8_t     * hash;
780    tr_torrent_t * tor;
781
782    tr_dbg( "Accept thread started" );
783
784#ifdef SYS_BEOS
785    /* This is required because on BeOS, SIGINT is sent to each thread,
786       which kills them not nicely */
787    signal( SIGINT, SIG_IGN );
788#endif
789
790    tr_lockLock( &h->acceptLock );
791
792    while( !h->acceptDie )
793    {
794        date1 = tr_date();
795
796        /* do NAT-PMP and UPnP pulses here since there's nowhere better */
797        tr_natpmpPulse( h->natpmp );
798        tr_upnpPulse( h->upnp );
799
800        /* Check for incoming connections */
801        if( h->bindSocket > -1 &&
802            h->acceptPeerCount < TR_MAX_PEER_COUNT &&
803            !tr_fdSocketWillCreate( h->fdlimit, 0 ) )
804        {
805            int            s;
806            struct in_addr addr;
807            in_port_t      port;
808            s = tr_netAccept( h->bindSocket, &addr, &port );
809            if( s > -1 )
810            {
811                h->acceptPeers[h->acceptPeerCount++] = tr_peerInit( addr, port, s );
812            }
813            else
814            {
815                tr_fdSocketClosed( h->fdlimit, 0 );
816            }
817        }
818
819        for( ii = 0; ii < h->acceptPeerCount; )
820        {
821            if( tr_peerRead( NULL, h->acceptPeers[ii] ) )
822            {
823                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
824                goto removePeer;
825            }
826            if( NULL != ( hash = tr_peerHash( h->acceptPeers[ii] ) ) )
827            {
828                for( tor = h->torrentList; tor; tor = tor->next )
829                {
830                    tr_lockLock( &tor->lock );
831                    if( 0 == memcmp( tor->info.hash, hash,
832                                     SHA_DIGEST_LENGTH ) )
833                    {
834                      tr_peerAttach( tor, h->acceptPeers[ii] );
835                      tr_lockUnlock( &tor->lock );
836                      goto removePeer;
837                    }
838                    tr_lockUnlock( &tor->lock );
839                }
840                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
841                goto removePeer;
842            }
843            if( date1 > tr_peerDate( h->acceptPeers[ii] ) + 10000 )
844            {
845                /* Give them 10 seconds to send the handshake */
846                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
847                goto removePeer;
848            }
849            ii++;
850            continue;
851           removePeer:
852            h->acceptPeerCount--;
853            memmove( &h->acceptPeers[ii], &h->acceptPeers[ii+1],
854                     ( h->acceptPeerCount - ii ) * sizeof( tr_peer_t * ) );
855        }
856
857        if( date1 > lastchoke + 2000 )
858        {
859            tr_chokingPulse( h->choking );
860            lastchoke = date1;
861        }
862
863        /* Wait up to 20 ms */
864        date2 = tr_date();
865        if( date2 < date1 + 20 )
866        {
867            tr_lockUnlock( &h->acceptLock );
868            tr_wait( date1 + 20 - date2 );
869            tr_lockLock( &h->acceptLock );
870        }
871    }
872
873    tr_lockUnlock( &h->acceptLock );
874
875    tr_dbg( "Accept thread exited" );
876}
877
878/***********************************************************************
879 * acceptStop
880 ***********************************************************************
881 * Joins the accept thread and frees/closes everything related to it.
882 **********************************************************************/
883static void acceptStop( tr_handle_t * h )
884{
885    int ii;
886
887    h->acceptDie = 1;
888    tr_threadJoin( &h->acceptThread );
889    tr_lockClose( &h->acceptLock );
890    tr_dbg( "Accept thread joined" );
891
892    for( ii = 0; ii < h->acceptPeerCount; ii++ )
893    {
894        tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
895    }
896
897    if( h->bindSocket > -1 )
898    {
899        tr_netClose( h->bindSocket );
900        tr_fdSocketClosed( h->fdlimit, 0 );
901    }
902}
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