source: trunk/libtransmission/transmission.c @ 920

Last change on this file since 920 was 920, checked in by joshe, 15 years ago

Merge nat-traversal branch to trunk.

  • Property svn:keywords set to Date Rev Author Id
File size: 24.2 KB
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1/******************************************************************************
2 * $Id: transmission.c 920 2006-09-25 18:37:45Z joshe $
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].isDownloading = tr_peerIsDownloading(peer);
580            peers[i].isUploading = tr_peerIsUploading(peer);
581        }
582    }
583   
584    tr_lockUnlock( &tor->lock );
585   
586    return peers;
587}
588
589void tr_torrentPeersFree( tr_peer_stat_t * peers, int peerCount )
590{
591    int i;
592
593    if (peers == NULL)
594        return;
595
596    for (i = 0; i < peerCount; i++)
597        free( peers[i].client );
598
599    free( peers );
600}
601
602void tr_torrentAvailability( tr_torrent_t * tor, int8_t * tab, int size )
603{
604    int i, j, piece;
605
606    tr_lockLock( &tor->lock );
607    for( i = 0; i < size; i++ )
608    {
609        piece = i * tor->info.pieceCount / size;
610
611        if( tr_cpPieceIsComplete( tor->completion, piece ) )
612        {
613            tab[i] = -1;
614            continue;
615        }
616
617        tab[i] = 0;
618        for( j = 0; j < tor->peerCount; j++ )
619        {
620            if( tr_peerBitfield( tor->peers[j] ) &&
621                tr_bitfieldHas( tr_peerBitfield( tor->peers[j] ), piece ) )
622            {
623                (tab[i])++;
624            }
625        }
626    }
627    tr_lockUnlock( &tor->lock );
628}
629
630void tr_torrentRemoveSaved( tr_torrent_t * tor ) {
631    tr_metainfoRemoveSaved( tor->info.hashString );
632}
633
634/***********************************************************************
635 * tr_torrentClose
636 ***********************************************************************
637 * Frees memory allocated by tr_torrentInit.
638 **********************************************************************/
639void tr_torrentClose( tr_handle_t * h, tr_torrent_t * tor )
640{
641    tr_info_t * inf = &tor->info;
642
643    if( tor->status & ( TR_STATUS_STOPPING | TR_STATUS_STOPPED ) )
644    {
645        /* Join the thread first */
646        torrentReallyStop( tor );
647    }
648
649    tr_lockLock( &h->acceptLock );
650
651    h->torrentCount--;
652
653    tr_lockClose( &tor->lock );
654    tr_cpClose( tor->completion );
655
656    tr_rcClose( tor->upload );
657    tr_rcClose( tor->download );
658    tr_rcClose( tor->swarmspeed );
659
660    if( tor->destination )
661    {
662        free( tor->destination );
663    }
664    free( inf->pieces );
665    free( inf->files );
666
667    if( tor->prev )
668    {
669        tor->prev->next = tor->next;
670    }
671    else
672    {
673        h->torrentList = tor->next;
674    }
675    if( tor->next )
676    {
677        tor->next->prev = tor->prev;
678    }
679    free( tor );
680
681    tr_lockUnlock( &h->acceptLock );
682}
683
684void tr_close( tr_handle_t * h )
685{
686    acceptStop( h );
687    tr_natpmpClose( h->natpmp );
688    tr_upnpClose( h->upnp );
689    tr_chokingClose( h->choking );
690    tr_fdClose( h->fdlimit );
691    tr_rcClose( h->upload );
692    tr_rcClose( h->download );
693    free( h );
694
695    tr_netResolveThreadClose();
696}
697
698/***********************************************************************
699 * downloadLoop
700 **********************************************************************/
701static void downloadLoop( void * _tor )
702{
703    tr_torrent_t * tor = _tor;
704    uint64_t       date1, date2;
705
706    tr_dbg( "Thread started" );
707
708#ifdef SYS_BEOS
709    /* This is required because on BeOS, SIGINT is sent to each thread,
710       which kills them not nicely */
711    signal( SIGINT, SIG_IGN );
712#endif
713
714    tr_lockLock( &tor->lock );
715
716    tr_cpReset( tor->completion );
717    tor->io     = tr_ioInit( tor );
718    tor->status = tr_cpIsSeeding( tor->completion ) ?
719                      TR_STATUS_SEED : TR_STATUS_DOWNLOAD;
720
721    while( !tor->die )
722    {
723        date1 = tr_date();
724
725        /* Are we finished ? */
726        if( ( tor->status & TR_STATUS_DOWNLOAD ) &&
727            tr_cpIsSeeding( tor->completion ) )
728        {
729            /* Done */
730            tor->status = TR_STATUS_SEED;
731                        tor->finished = 1;
732            tr_trackerCompleted( tor->tracker );
733            tr_ioSaveResume( tor->io );
734#ifndef __AMIGAOS4__
735            sync(); /* KLUDGE: all files should be closed and
736                       re-opened in read-only mode instead */
737#endif
738        }
739
740        /* Receive/send messages */
741        tr_peerPulse( tor );
742
743        /* Try to get new peers or to send a message to the tracker */
744        tr_trackerPulse( tor->tracker );
745
746        if( tor->status & TR_STATUS_STOPPED )
747        {
748            break;
749        }
750
751        /* Wait up to 20 ms */
752        date2 = tr_date();
753        if( date2 < date1 + 20 )
754        {
755            tr_lockUnlock( &tor->lock );
756            tr_wait( date1 + 20 - date2 );
757            tr_lockLock( &tor->lock );
758        }
759    }
760
761    tr_lockUnlock( &tor->lock );
762
763    tr_ioClose( tor->io );
764
765    tor->status = TR_STATUS_STOPPED;
766
767    tr_dbg( "Thread exited" );
768}
769
770/***********************************************************************
771 * acceptLoop
772 **********************************************************************/
773static void acceptLoop( void * _h )
774{
775    tr_handle_t * h = _h;
776    uint64_t      date1, date2, lastchoke = 0;
777    int           ii;
778    uint8_t     * hash;
779    tr_torrent_t * tor;
780
781    tr_dbg( "Accept thread started" );
782
783#ifdef SYS_BEOS
784    /* This is required because on BeOS, SIGINT is sent to each thread,
785       which kills them not nicely */
786    signal( SIGINT, SIG_IGN );
787#endif
788
789    tr_lockLock( &h->acceptLock );
790
791    while( !h->acceptDie )
792    {
793        date1 = tr_date();
794
795        /* do NAT-PMP and UPnP pulses here since there's nowhere better */
796        tr_natpmpPulse( h->natpmp );
797        tr_upnpPulse( h->upnp );
798
799        /* Check for incoming connections */
800        if( h->bindSocket > -1 &&
801            h->acceptPeerCount < TR_MAX_PEER_COUNT &&
802            !tr_fdSocketWillCreate( h->fdlimit, 0 ) )
803        {
804            int            s;
805            struct in_addr addr;
806            in_port_t      port;
807            s = tr_netAccept( h->bindSocket, &addr, &port );
808            if( s > -1 )
809            {
810                h->acceptPeers[h->acceptPeerCount++] = tr_peerInit( addr, port, s );
811            }
812            else
813            {
814                tr_fdSocketClosed( h->fdlimit, 0 );
815            }
816        }
817
818        for( ii = 0; ii < h->acceptPeerCount; )
819        {
820            if( tr_peerRead( NULL, h->acceptPeers[ii] ) )
821            {
822                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
823                goto removePeer;
824            }
825            if( NULL != ( hash = tr_peerHash( h->acceptPeers[ii] ) ) )
826            {
827                for( tor = h->torrentList; tor; tor = tor->next )
828                {
829                    tr_lockLock( &tor->lock );
830                    if( 0 == memcmp( tor->info.hash, hash,
831                                     SHA_DIGEST_LENGTH ) )
832                    {
833                      tr_peerAttach( tor, h->acceptPeers[ii] );
834                      tr_lockUnlock( &tor->lock );
835                      goto removePeer;
836                    }
837                    tr_lockUnlock( &tor->lock );
838                }
839                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
840                goto removePeer;
841            }
842            if( date1 > tr_peerDate( h->acceptPeers[ii] ) + 10000 )
843            {
844                /* Give them 10 seconds to send the handshake */
845                tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
846                goto removePeer;
847            }
848            ii++;
849            continue;
850           removePeer:
851            h->acceptPeerCount--;
852            memmove( &h->acceptPeers[ii], &h->acceptPeers[ii+1],
853                     ( h->acceptPeerCount - ii ) * sizeof( tr_peer_t * ) );
854        }
855
856        if( date1 > lastchoke + 2000 )
857        {
858            tr_chokingPulse( h->choking );
859            lastchoke = date1;
860        }
861
862        /* Wait up to 20 ms */
863        date2 = tr_date();
864        if( date2 < date1 + 20 )
865        {
866            tr_lockUnlock( &h->acceptLock );
867            tr_wait( date1 + 20 - date2 );
868            tr_lockLock( &h->acceptLock );
869        }
870    }
871
872    tr_lockUnlock( &h->acceptLock );
873
874    tr_dbg( "Accept thread exited" );
875}
876
877/***********************************************************************
878 * acceptStop
879 ***********************************************************************
880 * Joins the accept thread and frees/closes everything related to it.
881 **********************************************************************/
882static void acceptStop( tr_handle_t * h )
883{
884    int ii;
885
886    h->acceptDie = 1;
887    tr_threadJoin( &h->acceptThread );
888    tr_lockClose( &h->acceptLock );
889    tr_dbg( "Accept thread joined" );
890
891    for( ii = 0; ii < h->acceptPeerCount; ii++ )
892    {
893        tr_peerDestroy( h->fdlimit, h->acceptPeers[ii] );
894    }
895
896    if( h->bindSocket > -1 )
897    {
898        tr_netClose( h->bindSocket );
899        tr_fdSocketClosed( h->fdlimit, 0 );
900    }
901}
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