source: trunk/libtransmission/torrent.c @ 9351

Last change on this file since 9351 was 9351, checked in by livings124, 13 years ago

#2524 torrent peer limit not saved right away

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1/*
2 * This file Copyright (C) 2009 Charles Kerr <charles@transmissionbt.com>
3 *
4 * This file is licensed by the GPL version 2.  Works owned by the
5 * Transmission project are granted a special exemption to clause 2(b)
6 * so that the bulk of its code can remain under the MIT license.
7 * This exemption does not extend to derived works not owned by
8 * the Transmission project.
9 *
10 * $Id: torrent.c 9351 2009-10-21 23:32:02Z livings124 $
11 */
12
13#include <sys/types.h> /* stat */
14#include <sys/stat.h> /* stat */
15#include <unistd.h> /* stat */
16#include <dirent.h>
17
18#include <assert.h>
19#include <limits.h> /* INT_MAX */
20#include <math.h> /* fabs */
21#include <stdarg.h>
22#include <string.h> /* memcmp */
23#include <stdlib.h> /* qsort */
24
25#include <event.h> /* evbuffer */
26
27#include "transmission.h"
28#include "announcer.h"
29#include "bandwidth.h"
30#include "bencode.h"
31#include "completion.h"
32#include "crypto.h" /* for tr_sha1 */
33#include "resume.h"
34#include "fdlimit.h" /* tr_fdTorrentClose */
35#include "metainfo.h"
36#include "peer-mgr.h"
37#include "platform.h" /* TR_PATH_DELIMITER_STR */
38#include "ptrarray.h"
39#include "ratecontrol.h"
40#include "session.h"
41#include "torrent.h"
42#include "trevent.h"
43#include "utils.h"
44#include "verify.h"
45
46#define MAX_BLOCK_SIZE ( 1024 * 16 )
47
48/***
49****
50***/
51
52int
53tr_torrentId( const tr_torrent * tor )
54{
55    return tor->uniqueId;
56}
57
58tr_torrent*
59tr_torrentFindFromId( tr_session * session, int id )
60{
61    tr_torrent * tor = NULL;
62
63    while(( tor = tr_torrentNext( session, tor )))
64        if( tor->uniqueId == id )
65            return tor;
66
67    return NULL;
68}
69
70tr_torrent*
71tr_torrentFindFromHashString( tr_session *  session, const char * str )
72{
73    tr_torrent * tor = NULL;
74
75    while(( tor = tr_torrentNext( session, tor )))
76        if( !strcmp( str, tor->info.hashString ) )
77            return tor;
78
79    return NULL;
80}
81
82tr_torrent*
83tr_torrentFindFromHash( tr_session * session, const uint8_t * torrentHash )
84{
85    tr_torrent * tor = NULL;
86
87    while(( tor = tr_torrentNext( session, tor )))
88        if( *tor->info.hash == *torrentHash )
89            if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
90                return tor;
91
92    return NULL;
93}
94
95tr_torrent*
96tr_torrentFindFromObfuscatedHash( tr_session * session,
97                                  const uint8_t * obfuscatedTorrentHash )
98{
99    tr_torrent * tor = NULL;
100
101    while(( tor = tr_torrentNext( session, tor )))
102        if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
103                     SHA_DIGEST_LENGTH ) )
104            return tor;
105
106    return NULL;
107}
108
109/***
110****  PER-TORRENT UL / DL SPEEDS
111***/
112
113void
114tr_torrentSetSpeedLimit( tr_torrent * tor, tr_direction dir, int KiB_sec )
115{
116    assert( tr_isTorrent( tor ) );
117    assert( tr_isDirection( dir ) );
118
119    if( tr_bandwidthSetDesiredSpeed( tor->bandwidth, dir, KiB_sec ) )
120        tr_torrentSetDirty( tor );
121}
122
123int
124tr_torrentGetSpeedLimit( const tr_torrent * tor, tr_direction dir )
125{
126    assert( tr_isTorrent( tor ) );
127    assert( tr_isDirection( dir ) );
128
129    return tr_bandwidthGetDesiredSpeed( tor->bandwidth, dir );
130}
131
132void
133tr_torrentUseSpeedLimit( tr_torrent * tor, tr_direction dir, tr_bool do_use )
134{
135    assert( tr_isTorrent( tor ) );
136    assert( tr_isDirection( dir ) );
137
138    if( tr_bandwidthSetLimited( tor->bandwidth, dir, do_use ) )
139        tr_torrentSetDirty( tor );
140}
141
142tr_bool
143tr_torrentUsesSpeedLimit( const tr_torrent * tor, tr_direction dir )
144{
145    assert( tr_isTorrent( tor ) );
146    assert( tr_isDirection( dir ) );
147
148    return tr_bandwidthIsLimited( tor->bandwidth, dir );
149}
150
151void
152tr_torrentUseSessionLimits( tr_torrent * tor, tr_bool doUse )
153{
154    tr_bool changed;
155
156    assert( tr_isTorrent( tor ) );
157
158    changed = tr_bandwidthHonorParentLimits( tor->bandwidth, TR_UP, doUse );
159    changed |= tr_bandwidthHonorParentLimits( tor->bandwidth, TR_DOWN, doUse );
160
161    if( changed )
162        tr_torrentSetDirty( tor );
163}
164
165tr_bool
166tr_torrentUsesSessionLimits( const tr_torrent * tor )
167{
168    assert( tr_isTorrent( tor ) );
169
170    return tr_bandwidthAreParentLimitsHonored( tor->bandwidth, TR_UP );
171}
172
173/***
174****
175***/
176
177void
178tr_torrentSetRatioMode( tr_torrent *  tor, tr_ratiolimit mode )
179{
180    assert( tr_isTorrent( tor ) );
181    assert( mode==TR_RATIOLIMIT_GLOBAL || mode==TR_RATIOLIMIT_SINGLE || mode==TR_RATIOLIMIT_UNLIMITED  );
182
183    if( mode != tor->ratioLimitMode )
184    {
185        tor->ratioLimitMode = mode;
186        tor->needsSeedRatioCheck = TRUE;
187
188        tr_torrentSetDirty( tor );
189    }
190}
191
192tr_ratiolimit
193tr_torrentGetRatioMode( const tr_torrent * tor )
194{
195    assert( tr_isTorrent( tor ) );
196
197    return tor->ratioLimitMode;
198}
199
200void
201tr_torrentSetRatioLimit( tr_torrent * tor, double desiredRatio )
202{
203    assert( tr_isTorrent( tor ) );
204
205    if( (int)(desiredRatio*100.0) != (int)(tor->desiredRatio*100.0) )
206    {
207        tor->desiredRatio = desiredRatio;
208
209        tor->needsSeedRatioCheck = TRUE;
210
211        tr_torrentSetDirty( tor );
212    }
213}
214
215double
216tr_torrentGetRatioLimit( const tr_torrent * tor )
217{
218    assert( tr_isTorrent( tor ) );
219
220    return tor->desiredRatio;
221}
222
223tr_bool
224tr_torrentIsPieceTransferAllowed( const tr_torrent  * tor,
225                                  tr_direction        direction )
226{
227    int limit;
228    tr_bool allowed = TRUE;
229
230    if( tr_torrentUsesSpeedLimit( tor, direction ) )
231        if( tr_torrentGetSpeedLimit( tor, direction ) <= 0 )
232            allowed = FALSE;
233
234    if( tr_torrentUsesSessionLimits( tor ) )
235        if( tr_sessionGetActiveSpeedLimit( tor->session, direction, &limit ) )
236            if( limit <= 0 )
237                allowed = FALSE;
238
239    return allowed;
240}
241
242tr_bool
243tr_torrentGetSeedRatio( const tr_torrent * tor, double * ratio )
244{
245    tr_bool isLimited;
246
247    switch( tr_torrentGetRatioMode( tor ) )
248    {
249        case TR_RATIOLIMIT_SINGLE:
250            isLimited = TRUE;
251            if( ratio )
252                *ratio = tr_torrentGetRatioLimit( tor );
253            break;
254
255        case TR_RATIOLIMIT_GLOBAL:
256            isLimited = tr_sessionIsRatioLimited( tor->session );
257            if( isLimited && ratio )
258                *ratio = tr_sessionGetRatioLimit( tor->session );
259            break;
260
261        default: /* TR_RATIOLIMIT_UNLIMITED */
262            isLimited = FALSE;
263            break;
264    }
265
266    return isLimited;
267}
268
269/***
270****
271***/
272
273void
274tr_torrentSetLocalError( tr_torrent * tor, const char * fmt, ... )
275{
276    va_list ap;
277
278    assert( tr_isTorrent( tor ) );
279
280    va_start( ap, fmt );
281    tor->error = TR_STAT_LOCAL_ERROR;
282    evutil_vsnprintf( tor->errorString, sizeof( tor->errorString ), fmt, ap );
283    va_end( ap );
284}
285
286static void
287onTrackerResponse( void * tracker UNUSED,
288                   void * vevent,
289                   void * user_data )
290{
291    tr_torrent *       tor = user_data;
292    tr_tracker_event * event = vevent;
293
294    switch( event->messageType )
295    {
296        case TR_TRACKER_PEERS:
297        {
298            size_t   i, n;
299            tr_pex * pex = tr_peerMgrArrayToPex( event->compact,
300                                                 event->compactLen, &n );
301             if( event->allAreSeeds )
302                tr_tordbg( tor, "Got %d seeds from tracker", (int)n );
303            else
304                tr_torinf( tor, _( "Got %d peers from tracker" ), (int)n );
305
306            for( i = 0; i < n; ++i )
307            {
308                if( event->allAreSeeds )
309                    pex[i].flags |= ADDED_F_SEED_FLAG;
310                tr_peerMgrAddPex( tor, TR_PEER_FROM_TRACKER, pex + i );
311            }
312
313            tr_free( pex );
314            break;
315        }
316
317        case TR_TRACKER_WARNING:
318            tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
319            tor->error = TR_STAT_TRACKER_WARNING;
320            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
321            break;
322
323        case TR_TRACKER_ERROR:
324            tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
325            tor->error = TR_STAT_TRACKER_ERROR;
326            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
327            break;
328
329        case TR_TRACKER_ERROR_CLEAR:
330            tor->error = TR_STAT_OK;
331            tor->errorString[0] = '\0';
332            break;
333    }
334}
335
336/***
337****
338****  TORRENT INSTANTIATION
339****
340***/
341
342static int
343getBytePiece( const tr_info * info,
344              uint64_t        byteOffset )
345{
346    assert( info );
347    assert( info->pieceSize != 0 );
348
349    return byteOffset / info->pieceSize;
350}
351
352static void
353initFilePieces( tr_info *       info,
354                tr_file_index_t fileIndex )
355{
356    tr_file * file;
357    uint64_t  firstByte, lastByte;
358
359    assert( info );
360    assert( fileIndex < info->fileCount );
361
362    file = &info->files[fileIndex];
363    firstByte = file->offset;
364    lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
365    file->firstPiece = getBytePiece( info, firstByte );
366    file->lastPiece = getBytePiece( info, lastByte );
367}
368
369static int
370pieceHasFile( tr_piece_index_t piece,
371              const tr_file *  file )
372{
373    return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
374}
375
376static tr_priority_t
377calculatePiecePriority( const tr_torrent * tor,
378                        tr_piece_index_t   piece,
379                        int                fileHint )
380{
381    tr_file_index_t i;
382    int             priority = TR_PRI_LOW;
383
384    /* find the first file that has data in this piece */
385    if( fileHint >= 0 ) {
386        i = fileHint;
387        while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
388            --i;
389    } else {
390        for( i = 0; i < tor->info.fileCount; ++i )
391            if( pieceHasFile( piece, &tor->info.files[i] ) )
392                break;
393    }
394
395    /* the piece's priority is the max of the priorities
396     * of all the files in that piece */
397    for( ; i < tor->info.fileCount; ++i )
398    {
399        const tr_file * file = &tor->info.files[i];
400
401        if( !pieceHasFile( piece, file ) )
402            break;
403
404        priority = MAX( priority, file->priority );
405
406        /* when dealing with multimedia files, getting the first and
407           last pieces can sometimes allow you to preview it a bit
408           before it's fully downloaded... */
409        if( file->priority >= TR_PRI_NORMAL )
410            if( file->firstPiece == piece || file->lastPiece == piece )
411                priority = TR_PRI_HIGH;
412    }
413
414    return priority;
415}
416
417static void
418tr_torrentInitFilePieces( tr_torrent * tor )
419{
420    tr_file_index_t  f;
421    tr_piece_index_t p;
422    uint64_t offset = 0;
423    tr_info * inf = &tor->info;
424    int * firstFiles;
425
426    /* assign the file offsets */
427    for( f=0; f<inf->fileCount; ++f ) {
428        inf->files[f].offset = offset;
429        offset += inf->files[f].length;
430        initFilePieces( inf, f );
431    }
432
433    /* build the array of first-file hints to give calculatePiecePriority */
434    firstFiles = tr_new( int, inf->pieceCount );
435    for( p=f=0; p<inf->pieceCount; ++p ) {
436        while( inf->files[f].lastPiece < p )
437            ++f;
438        firstFiles[p] = f;
439    }
440
441#if 0
442    /* test to confirm the first-file hints are correct */
443    for( p=0; p<inf->pieceCount; ++p ) {
444        f = firstFiles[p];
445        assert( inf->files[f].firstPiece <= p );
446        assert( inf->files[f].lastPiece >= p );
447        if( f > 0 )
448            assert( inf->files[f-1].lastPiece < p );
449        for( f=0; f<inf->fileCount; ++f )
450            if( pieceHasFile( p, &inf->files[f] ) )
451                break;
452        assert( (int)f == firstFiles[p] );
453    }
454#endif
455
456    for( p=0; p<inf->pieceCount; ++p )
457        inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
458
459    tr_free( firstFiles );
460}
461
462int
463tr_torrentPromoteTracker( tr_torrent * tor,
464                          int          pos )
465{
466    int i;
467    int tier;
468
469    assert( tor );
470    assert( ( 0 <= pos ) && ( pos < tor->info.trackerCount ) );
471
472    /* the tier of the tracker we're promoting */
473    tier = tor->info.trackers[pos].tier;
474
475    /* find the index of that tier's first tracker */
476    for( i = 0; i < tor->info.trackerCount; ++i )
477        if( tor->info.trackers[i].tier == tier )
478            break;
479
480    assert( i < tor->info.trackerCount );
481
482    /* promote the tracker at `pos' to the front of the tier */
483    if( i != pos )
484    {
485        const tr_tracker_info tmp = tor->info.trackers[i];
486        tor->info.trackers[i] = tor->info.trackers[pos];
487        tor->info.trackers[pos] = tmp;
488    }
489
490    /* return the new position of the tracker that started out at [pos] */
491    return i;
492}
493
494struct RandomTracker
495{
496    tr_tracker_info    tracker;
497    int                random_value;
498};
499
500/* the tiers will be sorted from lowest to highest,
501 * and trackers are randomized within the tiers */
502static TR_INLINE int
503compareRandomTracker( const void * va,
504                      const void * vb )
505{
506    const struct RandomTracker * a = va;
507    const struct RandomTracker * b = vb;
508
509    if( a->tracker.tier != b->tracker.tier )
510        return a->tracker.tier - b->tracker.tier;
511
512    return a->random_value - b->random_value;
513}
514
515static void
516randomizeTiers( tr_info * info )
517{
518    int                    i;
519    const int              n = info->trackerCount;
520    struct RandomTracker * r = tr_new0( struct RandomTracker, n );
521
522    for( i = 0; i < n; ++i )
523    {
524        r[i].tracker = info->trackers[i];
525        r[i].random_value = tr_cryptoRandInt( INT_MAX );
526    }
527    qsort( r, n, sizeof( struct RandomTracker ), compareRandomTracker );
528    for( i = 0; i < n; ++i )
529        info->trackers[i] = r[i].tracker;
530    tr_free( r );
531}
532
533static void torrentStart( tr_torrent * tor );
534
535/**
536 * Decide on a block size.  constraints:
537 * (1) most clients decline requests over 16 KiB
538 * (2) pieceSize must be a multiple of block size
539 */
540static uint32_t
541getBlockSize( uint32_t pieceSize )
542{
543    uint32_t b = pieceSize;
544
545    while( b > MAX_BLOCK_SIZE )
546        b /= 2u;
547
548    if( !b || ( pieceSize % b ) ) /* not cleanly divisible */
549        return 0;
550    return b;
551}
552
553static void refreshCurrentDir( tr_torrent * tor );;
554
555static void
556torrentRealInit( tr_torrent * tor, const tr_ctor * ctor )
557{
558    int          doStart;
559    uint64_t     loaded;
560    uint64_t     t;
561    const char * dir;
562    static int   nextUniqueId = 1;
563    tr_info    * info = &tor->info;
564    tr_session * session = tr_ctorGetSession( ctor );
565
566    assert( session != NULL );
567
568    tr_globalLock( session );
569
570    tor->session   = session;
571    tor->uniqueId = nextUniqueId++;
572    tor->magicNumber = TORRENT_MAGIC_NUMBER;
573
574    randomizeTiers( info );
575
576    tor->bandwidth = tr_bandwidthNew( session, session->bandwidth );
577
578    tor->blockSize = getBlockSize( info->pieceSize );
579
580    if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) ||
581        !tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
582            tor->downloadDir = tr_strdup( dir );
583
584    if( tr_ctorGetIncompleteDir( ctor, &dir ) )
585        dir = tr_sessionGetIncompleteDir( session );
586    if( tr_sessionIsIncompleteDirEnabled( session ) )
587        tor->incompleteDir = tr_strdup( dir );
588
589    tor->lastPieceSize = info->totalSize % info->pieceSize;
590
591    if( !tor->lastPieceSize )
592        tor->lastPieceSize = info->pieceSize;
593
594    tor->lastBlockSize = info->totalSize % tor->blockSize;
595
596    if( !tor->lastBlockSize )
597        tor->lastBlockSize = tor->blockSize;
598
599    tor->blockCount =
600        ( info->totalSize + tor->blockSize - 1 ) / tor->blockSize;
601
602    tor->blockCountInPiece =
603        info->pieceSize / tor->blockSize;
604
605    tor->blockCountInLastPiece =
606        ( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize;
607
608    /* check our work */
609    assert( ( info->pieceSize % tor->blockSize ) == 0 );
610    t = info->pieceCount - 1;
611    t *= info->pieceSize;
612    t += tor->lastPieceSize;
613    assert( t == info->totalSize );
614    t = tor->blockCount - 1;
615    t *= tor->blockSize;
616    t += tor->lastBlockSize;
617    assert( t == info->totalSize );
618    t = info->pieceCount - 1;
619    t *= tor->blockCountInPiece;
620    t += tor->blockCountInLastPiece;
621    assert( t == (uint64_t)tor->blockCount );
622
623    tr_cpConstruct( &tor->completion, tor );
624
625    tr_torrentInitFilePieces( tor );
626
627    tr_rcConstruct( &tor->swarmSpeed );
628
629    tr_sha1( tor->obfuscatedHash, "req2", 4,
630             info->hash, SHA_DIGEST_LENGTH,
631             NULL );
632
633    tr_peerMgrAddTorrent( session->peerMgr, tor );
634
635    assert( !tor->downloadedCur );
636    assert( !tor->uploadedCur );
637
638    tr_ctorInitTorrentPriorities( ctor, tor );
639
640    tr_ctorInitTorrentWanted( ctor, tor );
641
642    tor->error = TR_STAT_OK;
643
644    tr_bitfieldConstruct( &tor->checkedPieces, tor->info.pieceCount );
645    tr_torrentUncheck( tor );
646
647    tr_torrentSetAddedDate( tor, time( NULL ) ); /* this is a default value to be
648                                                    overwritten by the resume file */
649
650    loaded = tr_torrentLoadResume( tor, ~0, ctor );
651
652    refreshCurrentDir( tor );
653
654    doStart = tor->isRunning;
655    tor->isRunning = 0;
656
657    if( !( loaded & TR_FR_SPEEDLIMIT ) )
658    {
659        tr_torrentUseSpeedLimit( tor, TR_UP, FALSE );
660        tr_torrentSetSpeedLimit( tor, TR_UP, tr_sessionGetSpeedLimit( tor->session, TR_UP ) );
661        tr_torrentUseSpeedLimit( tor, TR_DOWN, FALSE );
662        tr_torrentSetSpeedLimit( tor, TR_DOWN, tr_sessionGetSpeedLimit( tor->session, TR_DOWN ) );
663        tr_torrentUseSessionLimits( tor, TRUE );
664    }
665
666    if( !( loaded & TR_FR_RATIOLIMIT ) )
667    {
668        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
669        tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
670    }
671
672    tor->completeness = tr_cpGetStatus( &tor->completion );
673
674    {
675        tr_torrent * it = NULL;
676        tr_torrent * last = NULL;
677        while( ( it = tr_torrentNext( session, it ) ) )
678            last = it;
679
680        if( !last )
681            session->torrentList = tor;
682        else
683            last->next = tor;
684        ++session->torrentCount;
685    }
686
687    tr_globalUnlock( session );
688
689    /* maybe save our own copy of the metainfo */
690    if( tr_ctorGetSave( ctor ) )
691    {
692        const tr_benc * val;
693        if( !tr_ctorGetMetainfo( ctor, &val ) )
694        {
695            const char * filename = tor->info.torrent;
696            tr_bencToFile( val, TR_FMT_BENC, filename );
697            tr_sessionSetTorrentFile( tor->session, tor->info.hashString, filename );
698        }
699    }
700
701    tor->tiers = tr_announcerAddTorrent( session->announcer, tor );
702    tor->tiersSubscription = tr_announcerSubscribe( tor->tiers, onTrackerResponse, tor );
703
704    tr_metainfoMigrate( session, &tor->info );
705
706    if( doStart )
707        torrentStart( tor );
708}
709
710tr_parse_result
711tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
712{
713    int             doFree;
714    tr_bool         didParse;
715    tr_info         tmp;
716    const tr_benc * metainfo;
717    tr_session    * session = tr_ctorGetSession( ctor );
718    tr_parse_result result = TR_PARSE_OK;
719
720    if( setmeInfo == NULL )
721        setmeInfo = &tmp;
722    memset( setmeInfo, 0, sizeof( tr_info ) );
723
724    if( tr_ctorGetMetainfo( ctor, &metainfo ) )
725        return TR_PARSE_ERR;
726
727    didParse = tr_metainfoParse( session, setmeInfo, metainfo );
728    doFree = didParse && ( setmeInfo == &tmp );
729
730    if( !didParse )
731        result = TR_PARSE_ERR;
732
733    if( didParse && !getBlockSize( setmeInfo->pieceSize ) )
734        result = TR_PARSE_ERR;
735
736    if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
737        result = TR_PARSE_DUPLICATE;
738
739    if( doFree )
740        tr_metainfoFree( setmeInfo );
741
742    return result;
743}
744
745tr_torrent *
746tr_torrentNew( const tr_ctor  * ctor,
747               int            * setmeError )
748{
749    int          err;
750    tr_info      tmpInfo;
751    tr_torrent * tor = NULL;
752
753    assert( ctor != NULL );
754    assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
755
756    err = tr_torrentParse( ctor, &tmpInfo );
757    if( !err )
758    {
759        tor = tr_new0( tr_torrent, 1 );
760        tor->info = tmpInfo;
761        torrentRealInit( tor, ctor );
762    }
763    else if( setmeError )
764    {
765        *setmeError = err;
766    }
767
768    return tor;
769}
770
771/**
772***
773**/
774
775void
776tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
777{
778    assert( tr_isTorrent( tor  ) );
779
780    if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
781    {
782        tr_free( tor->downloadDir );
783        tor->downloadDir = tr_strdup( path );
784        tr_torrentSetDirty( tor );
785    }
786
787    refreshCurrentDir( tor );
788}
789
790const char*
791tr_torrentGetDownloadDir( const tr_torrent * tor )
792{
793    assert( tr_isTorrent( tor  ) );
794
795    return tor->downloadDir;
796}
797
798const char *
799tr_torrentGetCurrentDir( const tr_torrent * tor )
800{
801    assert( tr_isTorrent( tor  ) );
802
803    return tor->currentDir;
804}
805
806
807void
808tr_torrentChangeMyPort( tr_torrent * tor )
809{
810    assert( tr_isTorrent( tor  ) );
811
812    tr_announcerChangeMyPort( tor );
813}
814
815static TR_INLINE void
816tr_torrentManualUpdateImpl( void * vtor )
817{
818    tr_torrent * tor = vtor;
819
820    assert( tr_isTorrent( tor  ) );
821
822    if( tor->isRunning )
823        tr_announcerManualAnnounce( tor );
824}
825
826void
827tr_torrentManualUpdate( tr_torrent * tor )
828{
829    assert( tr_isTorrent( tor  ) );
830
831    tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
832}
833
834tr_bool
835tr_torrentCanManualUpdate( const tr_torrent * tor )
836{
837    return ( tr_isTorrent( tor  ) )
838        && ( tor->isRunning )
839        && ( tr_announcerCanManualAnnounce( tor ) );
840}
841
842const tr_info *
843tr_torrentInfo( const tr_torrent * tor )
844{
845    return tr_isTorrent( tor ) ? &tor->info : NULL;
846}
847
848const tr_stat *
849tr_torrentStatCached( tr_torrent * tor )
850{
851    const time_t now = time( NULL );
852
853    return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
854         ? &tor->stats
855         : tr_torrentStat( tor );
856}
857
858void
859tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
860{
861    assert( tr_isTorrent( tor ) );
862    assert( state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW );
863
864    tor->verifyState = state;
865    tor->anyDate = time( NULL );
866}
867
868tr_torrent_activity
869tr_torrentGetActivity( tr_torrent * tor )
870{
871    assert( tr_isTorrent( tor ) );
872
873    tr_torrentRecheckCompleteness( tor );
874
875    if( tor->verifyState == TR_VERIFY_NOW )
876        return TR_STATUS_CHECK;
877    if( tor->verifyState == TR_VERIFY_WAIT )
878        return TR_STATUS_CHECK_WAIT;
879    if( !tor->isRunning )
880        return TR_STATUS_STOPPED;
881    if( tor->completeness == TR_LEECH )
882        return TR_STATUS_DOWNLOAD;
883
884    return TR_STATUS_SEED;
885}
886
887const tr_stat *
888tr_torrentStat( tr_torrent * tor )
889{
890    tr_stat *               s;
891    int                     usableSeeds = 0;
892    uint64_t                now;
893    double                  downloadedForRatio, seedRatio=0;
894    double                  d;
895    tr_bool                 checkSeedRatio;
896
897    if( !tor )
898        return NULL;
899
900    assert( tr_isTorrent( tor ) );
901    tr_torrentLock( tor );
902
903    tor->lastStatTime = time( NULL );
904
905    s = &tor->stats;
906    s->id = tor->uniqueId;
907    s->activity = tr_torrentGetActivity( tor );
908    s->error = tor->error;
909    memcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
910
911    s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
912
913    tr_peerMgrTorrentStats( tor,
914                            &s->peersKnown,
915                            &s->peersConnected,
916                            &usableSeeds,
917                            &s->webseedsSendingToUs,
918                            &s->peersSendingToUs,
919                            &s->peersGettingFromUs,
920                            s->peersFrom );
921
922    now = tr_date( );
923    d = tr_peerMgrGetWebseedSpeed( tor, now );
924    s->swarmSpeed         = tr_rcRate( &tor->swarmSpeed, now );
925    s->rawUploadSpeed     = tr_bandwidthGetRawSpeed  ( tor->bandwidth, now, TR_UP );
926    s->pieceUploadSpeed   = tr_bandwidthGetPieceSpeed( tor->bandwidth, now, TR_UP );
927    s->rawDownloadSpeed   = d + tr_bandwidthGetRawSpeed  ( tor->bandwidth, now, TR_DOWN );
928    s->pieceDownloadSpeed = d + tr_bandwidthGetPieceSpeed( tor->bandwidth, now, TR_DOWN );
929
930    usableSeeds += tor->info.webseedCount;
931
932    s->percentComplete = tr_cpPercentComplete ( &tor->completion );
933
934    s->percentDone   = tr_cpPercentDone  ( &tor->completion );
935    s->leftUntilDone = tr_cpLeftUntilDone( &tor->completion );
936    s->sizeWhenDone  = tr_cpSizeWhenDone ( &tor->completion );
937
938    s->recheckProgress = s->activity == TR_STATUS_CHECK
939                       ? 1.0 -
940                         ( tr_torrentCountUncheckedPieces( tor ) /
941                           (double) tor->info.pieceCount )
942                       : 0.0;
943
944    s->activityDate = tor->activityDate;
945    s->addedDate    = tor->addedDate;
946    s->doneDate     = tor->doneDate;
947    s->startDate    = tor->startDate;
948
949    s->corruptEver     = tor->corruptCur    + tor->corruptPrev;
950    s->downloadedEver  = tor->downloadedCur + tor->downloadedPrev;
951    s->uploadedEver    = tor->uploadedCur   + tor->uploadedPrev;
952    s->haveValid       = tr_cpHaveValid( &tor->completion );
953    s->haveUnchecked   = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
954
955    if( usableSeeds > 0 )
956    {
957        s->desiredAvailable = s->leftUntilDone;
958    }
959    else if( !s->leftUntilDone || !s->peersConnected )
960    {
961        s->desiredAvailable = 0;
962    }
963    else
964    {
965        tr_piece_index_t i;
966        tr_bitfield *    peerPieces = tr_peerMgrGetAvailable( tor );
967        s->desiredAvailable = 0;
968        for( i = 0; i < tor->info.pieceCount; ++i )
969            if( !tor->info.pieces[i].dnd && tr_bitfieldHasFast( peerPieces, i ) )
970                s->desiredAvailable += tr_cpMissingBlocksInPiece( &tor->completion, i );
971        s->desiredAvailable *= tor->blockSize;
972        tr_bitfieldFree( peerPieces );
973    }
974
975    downloadedForRatio = s->downloadedEver ? s->downloadedEver : s->haveValid;
976    s->ratio = tr_getRatio( s->uploadedEver, downloadedForRatio );
977
978    checkSeedRatio = tr_torrentGetSeedRatio( tor, &seedRatio );
979
980    switch( s->activity )
981    {
982        case TR_STATUS_DOWNLOAD:
983            if( s->leftUntilDone > s->desiredAvailable )
984                s->eta = TR_ETA_NOT_AVAIL;
985            else if( s->pieceDownloadSpeed < 0.1 )
986                s->eta = TR_ETA_UNKNOWN;
987            else {
988                /* etaSpeed exists because if we pieceDownloadSpeed directly,
989                 * brief fluctuations cause the ETA to jump all over the place.
990                 * so, etaSpeed is a smoothed-out version of pieceDownloadSpeed
991                 * to dampen the effect of fluctuations */
992                if( ( tor->etaSpeedCalculatedAt + 800 ) < now ) {
993                    tor->etaSpeedCalculatedAt = now;
994                    tor->etaSpeed = (fabs(tor->etaSpeed)<0.0001)
995                        ? s->pieceDownloadSpeed /* if no previous speed, no need to smooth */
996                        : 0.8*tor->etaSpeed + 0.2*s->pieceDownloadSpeed; /* smooth across 5 readings */
997                }
998                s->eta = s->leftUntilDone / tor->etaSpeed / 1024.0;
999            }
1000            break;
1001
1002        case TR_STATUS_SEED:
1003            if( checkSeedRatio )
1004            {
1005                if( s->pieceUploadSpeed < 0.1 )
1006                    s->eta = TR_ETA_UNKNOWN;
1007                else
1008                    s->eta = (downloadedForRatio * (seedRatio - s->ratio)) / s->pieceUploadSpeed / 1024.0;
1009            }
1010            else
1011                s->eta = TR_ETA_NOT_AVAIL;
1012            break;
1013
1014        default:
1015            s->eta = TR_ETA_NOT_AVAIL;
1016            break;
1017    }
1018
1019    if( !checkSeedRatio || s->ratio >= seedRatio || s->ratio == TR_RATIO_INF )
1020        s->percentRatio = 1.0;
1021    else if( s->ratio == TR_RATIO_NA )
1022        s->percentRatio = 0.0;
1023    else
1024        s->percentRatio = s->ratio / seedRatio;
1025
1026    tr_torrentUnlock( tor );
1027
1028    return s;
1029}
1030
1031/***
1032****
1033***/
1034
1035static uint64_t
1036fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1037{
1038    uint64_t total = 0;
1039    const tr_file * f = &tor->info.files[index];
1040
1041    if( f->length )
1042    {
1043        const tr_block_index_t firstBlock = f->offset / tor->blockSize;
1044        const uint64_t lastByte = f->offset + f->length - 1;
1045        const tr_block_index_t lastBlock = lastByte / tor->blockSize;
1046
1047        if( firstBlock == lastBlock )
1048        {
1049            if( tr_cpBlockIsCompleteFast( &tor->completion, firstBlock ) )
1050                total = f->length;
1051        }
1052        else
1053        {
1054            uint32_t i;
1055
1056            /* the first block */
1057            if( tr_cpBlockIsCompleteFast( &tor->completion, firstBlock ) )
1058                total += tor->blockSize - ( f->offset % tor->blockSize );
1059
1060            /* the middle blocks */
1061            if( f->firstPiece == f->lastPiece )
1062            {
1063                for( i=firstBlock+1; i<lastBlock; ++i )
1064                    if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1065                        total += tor->blockSize;
1066            }
1067            else
1068            {
1069                int64_t b = 0;
1070                const tr_block_index_t firstBlockOfLastPiece
1071                           = tr_torPieceFirstBlock( tor, f->lastPiece );
1072                const tr_block_index_t lastBlockOfFirstPiece
1073                           = tr_torPieceFirstBlock( tor, f->firstPiece )
1074                             + tr_torPieceCountBlocks( tor, f->firstPiece ) - 1;
1075
1076                /* the rest of the first piece */
1077                for( i=firstBlock+1; i<lastBlock && i<=lastBlockOfFirstPiece; ++i )
1078                    if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1079                        ++b;
1080
1081                /* the middle pieces */
1082                if( f->firstPiece + 1 < f->lastPiece )
1083                    for( i=f->firstPiece+1; i<f->lastPiece; ++i )
1084                        b += tor->blockCountInPiece - tr_cpMissingBlocksInPiece( &tor->completion, i );
1085
1086                /* the rest of the last piece */
1087                for( i=firstBlockOfLastPiece; i<lastBlock; ++i )
1088                    if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1089                        ++b;
1090
1091                b *= tor->blockSize;
1092                total += b;
1093            }
1094
1095            /* the last block */
1096            if( tr_cpBlockIsCompleteFast( &tor->completion, lastBlock ) )
1097                total += ( f->offset + f->length ) - ( tor->blockSize * lastBlock );
1098        }
1099    }
1100
1101    return total;
1102}
1103
1104tr_file_stat *
1105tr_torrentFiles( const tr_torrent * tor,
1106                 tr_file_index_t *  fileCount )
1107{
1108    tr_file_index_t       i;
1109    const tr_file_index_t n = tor->info.fileCount;
1110    tr_file_stat *        files = tr_new0( tr_file_stat, n );
1111    tr_file_stat *        walk = files;
1112    const tr_bool         isSeed = tor->completeness == TR_SEED;
1113
1114    assert( tr_isTorrent( tor ) );
1115
1116    for( i = 0; i < n; ++i, ++walk )
1117    {
1118        const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1119        walk->bytesCompleted = b;
1120        walk->progress = tr_getRatio( b, tor->info.files[i].length );
1121    }
1122
1123    if( fileCount )
1124        *fileCount = n;
1125
1126    return files;
1127}
1128
1129void
1130tr_torrentFilesFree( tr_file_stat *            files,
1131                     tr_file_index_t fileCount UNUSED )
1132{
1133    tr_free( files );
1134}
1135
1136/***
1137****
1138***/
1139
1140float*
1141tr_torrentWebSpeeds( const tr_torrent * tor )
1142{
1143    return tr_isTorrent( tor )
1144         ? tr_peerMgrWebSpeeds( tor )
1145         : NULL;
1146}
1147
1148tr_peer_stat *
1149tr_torrentPeers( const tr_torrent * tor,
1150                 int *              peerCount )
1151{
1152    tr_peer_stat * ret = NULL;
1153
1154    if( tr_isTorrent( tor ) )
1155        ret = tr_peerMgrPeerStats( tor, peerCount );
1156
1157    return ret;
1158}
1159
1160void
1161tr_torrentPeersFree( tr_peer_stat * peers,
1162                     int peerCount  UNUSED )
1163{
1164    tr_free( peers );
1165}
1166
1167tr_tracker_stat *
1168tr_torrentTrackers( const tr_torrent * torrent,
1169                    int              * setmeTrackerCount )
1170{
1171    assert( tr_isTorrent( torrent ) );
1172
1173    return tr_announcerStats( torrent, setmeTrackerCount );
1174}
1175
1176void
1177tr_torrentTrackersFree( tr_tracker_stat * trackers,
1178                        int trackerCount )
1179{
1180    tr_announcerStatsFree( trackers, trackerCount );
1181}
1182
1183void
1184tr_torrentAvailability( const tr_torrent * tor,
1185                        int8_t *           tab,
1186                        int                size )
1187{
1188    tr_peerMgrTorrentAvailability( tor, tab, size );
1189}
1190
1191void
1192tr_torrentAmountFinished( const tr_torrent * tor,
1193                          float *            tab,
1194                          int                size )
1195{
1196    assert( tr_isTorrent( tor ) );
1197
1198    tr_torrentLock( tor );
1199    tr_cpGetAmountDone( &tor->completion, tab, size );
1200    tr_torrentUnlock( tor );
1201}
1202
1203static void
1204tr_torrentResetTransferStats( tr_torrent * tor )
1205{
1206    assert( tr_isTorrent( tor ) );
1207
1208    tr_torrentLock( tor );
1209
1210    tor->downloadedPrev += tor->downloadedCur;
1211    tor->downloadedCur   = 0;
1212    tor->uploadedPrev   += tor->uploadedCur;
1213    tor->uploadedCur     = 0;
1214    tor->corruptPrev    += tor->corruptCur;
1215    tor->corruptCur      = 0;
1216
1217    tr_torrentSetDirty( tor );
1218
1219    tr_torrentUnlock( tor );
1220}
1221
1222void
1223tr_torrentSetHasPiece( tr_torrent *     tor,
1224                       tr_piece_index_t pieceIndex,
1225                       tr_bool          has )
1226{
1227    assert( tr_isTorrent( tor ) );
1228    assert( pieceIndex < tor->info.pieceCount );
1229
1230    if( has )
1231        tr_cpPieceAdd( &tor->completion, pieceIndex );
1232    else
1233        tr_cpPieceRem( &tor->completion, pieceIndex );
1234}
1235
1236/***
1237****
1238***/
1239
1240static void
1241freeTorrent( tr_torrent * tor )
1242{
1243    tr_torrent * t;
1244    tr_session *  session = tor->session;
1245    tr_info *    inf = &tor->info;
1246
1247    assert( tr_isTorrent( tor ) );
1248    assert( !tor->isRunning );
1249
1250    tr_globalLock( session );
1251
1252    tr_peerMgrRemoveTorrent( tor );
1253
1254    tr_cpDestruct( &tor->completion );
1255
1256    tr_rcDestruct( &tor->swarmSpeed );
1257
1258    tr_announcerUnsubscribe( tor->tiers, tor->tiersSubscription );
1259    tr_announcerRemoveTorrent( session->announcer, tor );
1260
1261    tr_bitfieldDestruct( &tor->checkedPieces );
1262
1263    tr_free( tor->downloadDir );
1264    tr_free( tor->incompleteDir );
1265    tr_free( tor->peer_id );
1266
1267    if( tor == session->torrentList )
1268        session->torrentList = tor->next;
1269    else for( t = session->torrentList; t != NULL; t = t->next ) {
1270        if( t->next == tor ) {
1271            t->next = tor->next;
1272            break;
1273        }
1274    }
1275
1276    assert( session->torrentCount >= 1 );
1277    session->torrentCount--;
1278
1279    tr_bandwidthFree( tor->bandwidth );
1280
1281    tr_metainfoFree( inf );
1282    tr_free( tor );
1283
1284    tr_globalUnlock( session );
1285}
1286
1287/**
1288***  Start/Stop Callback
1289**/
1290
1291static void
1292checkAndStartImpl( void * vtor )
1293{
1294    tr_torrent * tor = vtor;
1295
1296    assert( tr_isTorrent( tor ) );
1297
1298    tr_globalLock( tor->session );
1299
1300    /** If we had local data before, but it's disappeared,
1301        stop the torrent and log an error. */
1302    if( tor->preVerifyTotal && !tr_cpHaveTotal( &tor->completion ) )
1303    {
1304        tr_torrentSetLocalError( tor, _( "Can't find local data.  Try \"Set Location\" to find it, or restart the torrent to re-download." ) );
1305        tr_torrentStop( tor );
1306    }
1307    else
1308    {
1309        const time_t now = time( NULL );
1310        tor->isRunning = TRUE;
1311        tor->needsSeedRatioCheck = TRUE;
1312        tor->error = TR_STAT_OK;
1313        tor->errorString[0] = '\0';
1314        tor->completeness = tr_cpGetStatus( &tor->completion );
1315        tor->startDate = tor->anyDate = now;
1316
1317        tr_torrentResetTransferStats( tor );
1318        tr_announcerTorrentStarted( tor );
1319        tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1320        tr_peerMgrStartTorrent( tor );
1321    }
1322
1323    tr_globalUnlock( tor->session );
1324}
1325
1326static void
1327checkAndStartCB( tr_torrent * tor )
1328{
1329    assert( tr_isTorrent( tor ) );
1330    assert( tr_isSession( tor->session ) );
1331
1332    tr_runInEventThread( tor->session, checkAndStartImpl, tor );
1333}
1334
1335static void
1336torrentStart( tr_torrent * tor )
1337{
1338    assert( tr_isTorrent( tor ) );
1339
1340    tr_globalLock( tor->session );
1341
1342    if( !tor->isRunning )
1343    {
1344        tr_verifyRemove( tor );
1345
1346        /* corresponds to the peer_id sent as a tracker request parameter.
1347         * one tracker admin says: "When the same torrent is opened and
1348         * closed and opened again without quitting Transmission ...
1349         * change the peerid. It would help sometimes if a stopped event
1350         * was missed to ensure that we didn't think someone was cheating. */
1351        tr_free( tor->peer_id );
1352        tor->peer_id = tr_peerIdNew( );
1353
1354        tor->isRunning = 1;
1355        tr_torrentSetDirty( tor );
1356        tor->preVerifyTotal = tr_cpHaveTotal( &tor->completion );
1357        tr_verifyAdd( tor, checkAndStartCB );
1358    }
1359
1360    tr_globalUnlock( tor->session );
1361}
1362
1363void
1364tr_torrentStart( tr_torrent * tor )
1365{
1366    if( tr_isTorrent( tor ) )
1367        torrentStart( tor );
1368}
1369
1370static void
1371torrentRecheckDoneImpl( void * vtor )
1372{
1373    tr_torrent * tor = vtor;
1374
1375    assert( tr_isTorrent( tor ) );
1376    tr_torrentRecheckCompleteness( tor );
1377
1378    if( tor->preVerifyTotal && !tr_cpHaveTotal( &tor->completion ) )
1379    {
1380        tr_torrentSetLocalError( tor, _( "Can't find local data.  Try \"Set Location\" to find it, or restart the torrent to re-download." ) );
1381        tr_torrentStop( tor );
1382    }
1383    else if( tor->startAfterVerify )
1384    {
1385        tor->startAfterVerify = FALSE;
1386
1387        tr_torrentStart( tor );
1388    }
1389}
1390
1391static void
1392torrentRecheckDoneCB( tr_torrent * tor )
1393{
1394    assert( tr_isTorrent( tor ) );
1395
1396    tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1397}
1398
1399static void
1400verifyTorrent( void * vtor )
1401{
1402    tr_torrent * tor = vtor;
1403
1404    assert( tr_isTorrent( tor ) );
1405    tr_globalLock( tor->session );
1406
1407    /* if the torrent's already being verified, stop it */
1408    tr_verifyRemove( tor );
1409
1410    /* if the torrent's running, stop it & set the restart-after-verify flag */
1411    if( tor->startAfterVerify || tor->isRunning ) {
1412        tr_torrentStop( tor );
1413        tor->startAfterVerify = TRUE;
1414    }
1415
1416    /* add the torrent to the recheck queue */
1417    tor->preVerifyTotal = tr_cpHaveTotal( &tor->completion );
1418    tr_torrentUncheck( tor );
1419    tr_verifyAdd( tor, torrentRecheckDoneCB );
1420
1421    tr_globalUnlock( tor->session );
1422}
1423
1424void
1425tr_torrentVerify( tr_torrent * tor )
1426{
1427    if( tr_isTorrent( tor ) )
1428        tr_runInEventThread( tor->session, verifyTorrent, tor );
1429}
1430
1431void
1432tr_torrentSave( tr_torrent * tor )
1433{
1434    assert( tr_isTorrent( tor ) );
1435
1436    if( tor->isDirty ) {
1437        tor->isDirty = FALSE;
1438        tr_torrentSaveResume( tor );
1439    }
1440}
1441
1442static void
1443stopTorrent( void * vtor )
1444{
1445    tr_torrent * tor = vtor;
1446
1447    assert( tr_isTorrent( tor ) );
1448
1449    tr_verifyRemove( tor );
1450    tr_peerMgrStopTorrent( tor );
1451    tr_announcerTorrentStopped( tor );
1452
1453    tr_fdTorrentClose( tor->uniqueId );
1454
1455    if( !tor->isDeleting )
1456        tr_torrentSave( tor );
1457}
1458
1459void
1460tr_torrentStop( tr_torrent * tor )
1461{
1462    assert( tr_isTorrent( tor ) );
1463
1464    if( tr_isTorrent( tor ) )
1465    {
1466        tr_globalLock( tor->session );
1467
1468        tor->isRunning = 0;
1469        tr_torrentSetDirty( tor );
1470        tr_runInEventThread( tor->session, stopTorrent, tor );
1471
1472        tr_globalUnlock( tor->session );
1473    }
1474}
1475
1476static void
1477closeTorrent( void * vtor )
1478{
1479    tr_benc * d;
1480    tr_torrent * tor = vtor;
1481
1482    assert( tr_isTorrent( tor ) );
1483
1484    d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1485    tr_bencDictAddInt( d, "id", tor->uniqueId );
1486    tr_bencDictAddInt( d, "date", time( NULL ) );
1487
1488    stopTorrent( tor );
1489
1490    if( tor->isDeleting )
1491    {
1492        tr_metainfoRemoveSaved( tor->session, &tor->info );
1493        tr_torrentRemoveResume( tor );
1494    }
1495
1496    tor->isRunning = 0;
1497    freeTorrent( tor );
1498}
1499
1500void
1501tr_torrentFree( tr_torrent * tor )
1502{
1503    if( tr_isTorrent( tor ) )
1504    {
1505        tr_session * session = tor->session;
1506        assert( tr_isSession( session ) );
1507        tr_globalLock( session );
1508
1509        tr_torrentClearCompletenessCallback( tor );
1510        tr_runInEventThread( session, closeTorrent, tor );
1511
1512        tr_globalUnlock( session );
1513    }
1514}
1515
1516void
1517tr_torrentRemove( tr_torrent * tor )
1518{
1519    assert( tr_isTorrent( tor ) );
1520
1521    tor->isDeleting = 1;
1522    tr_torrentFree( tor );
1523}
1524
1525/**
1526***  Completeness
1527**/
1528
1529static const char *
1530getCompletionString( int type )
1531{
1532    switch( type )
1533    {
1534        /* Translators: this is a minor point that's safe to skip over, but FYI:
1535           "Complete" and "Done" are specific, different terms in Transmission:
1536           "Complete" means we've downloaded every file in the torrent.
1537           "Done" means we're done downloading the files we wanted, but NOT all
1538           that exist */
1539        case TR_PARTIAL_SEED:
1540            return _( "Done" );
1541
1542        case TR_SEED:
1543            return _( "Complete" );
1544
1545        default:
1546            return _( "Incomplete" );
1547    }
1548}
1549
1550static void
1551fireCompletenessChange( tr_torrent       * tor,
1552                        tr_completeness    status )
1553{
1554    assert( tr_isTorrent( tor ) );
1555    assert( ( status == TR_LEECH )
1556         || ( status == TR_SEED )
1557         || ( status == TR_PARTIAL_SEED ) );
1558
1559    if( tor->completeness_func )
1560        tor->completeness_func( tor, status, tor->completeness_func_user_data );
1561}
1562
1563void
1564tr_torrentSetCompletenessCallback( tr_torrent                    * tor,
1565                                   tr_torrent_completeness_func    func,
1566                                   void                          * user_data )
1567{
1568    assert( tr_isTorrent( tor ) );
1569
1570    tor->completeness_func = func;
1571    tor->completeness_func_user_data = user_data;
1572}
1573
1574void
1575tr_torrentSetRatioLimitHitCallback( tr_torrent                     * tor,
1576                                    tr_torrent_ratio_limit_hit_func  func,
1577                                    void                           * user_data )
1578{
1579    assert( tr_isTorrent( tor ) );
1580
1581    tor->ratio_limit_hit_func = func;
1582    tor->ratio_limit_hit_func_user_data = user_data;
1583}
1584
1585void
1586tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1587{
1588    tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1589}
1590
1591void
1592tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1593{
1594    tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1595}
1596
1597void
1598tr_torrentRecheckCompleteness( tr_torrent * tor )
1599{
1600    tr_completeness completeness;
1601
1602    assert( tr_isTorrent( tor ) );
1603
1604    tr_torrentLock( tor );
1605
1606    completeness = tr_cpGetStatus( &tor->completion );
1607
1608    if( completeness != tor->completeness )
1609    {
1610        const int recentChange = tor->downloadedCur != 0;
1611
1612        if( recentChange )
1613        {
1614            tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
1615                      getCompletionString( tor->completeness ),
1616                      getCompletionString( completeness ) );
1617        }
1618
1619        tor->completeness = completeness;
1620        tor->needsSeedRatioCheck = TRUE;
1621        tr_fdTorrentClose( tor->uniqueId );
1622
1623        /* if the torrent is a seed now,
1624         * and the files used to be in the incompleteDir,
1625         * then move them to the destination directory */
1626        if( tr_torrentIsSeed( tor ) && ( tor->currentDir == tor->incompleteDir ) )
1627            tr_torrentSetLocation( tor, tor->downloadDir, TRUE, NULL, NULL );
1628
1629        fireCompletenessChange( tor, completeness );
1630
1631        if( recentChange && ( completeness == TR_SEED ) )
1632        {
1633            tr_announcerTorrentCompleted( tor );
1634
1635            tor->doneDate = tor->anyDate = time( NULL );
1636        }
1637
1638        tr_torrentSetDirty( tor );
1639    }
1640
1641    tr_torrentUnlock( tor );
1642}
1643
1644/**
1645***  File priorities
1646**/
1647
1648void
1649tr_torrentInitFilePriority( tr_torrent *    tor,
1650                            tr_file_index_t fileIndex,
1651                            tr_priority_t   priority )
1652{
1653    tr_piece_index_t i;
1654    tr_file *        file;
1655
1656    assert( tr_isTorrent( tor ) );
1657    assert( fileIndex < tor->info.fileCount );
1658    assert( tr_isPriority( priority ) );
1659
1660    file = &tor->info.files[fileIndex];
1661    file->priority = priority;
1662    for( i = file->firstPiece; i <= file->lastPiece; ++i )
1663        tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
1664}
1665
1666void
1667tr_torrentSetFilePriorities( tr_torrent *      tor,
1668                             tr_file_index_t * files,
1669                             tr_file_index_t   fileCount,
1670                             tr_priority_t     priority )
1671{
1672    tr_file_index_t i;
1673
1674    assert( tr_isTorrent( tor ) );
1675
1676    tr_torrentLock( tor );
1677
1678    for( i = 0; i < fileCount; ++i )
1679        tr_torrentInitFilePriority( tor, files[i], priority );
1680
1681    tr_torrentSetDirty( tor );
1682    tr_torrentUnlock( tor );
1683}
1684
1685tr_priority_t
1686tr_torrentGetFilePriority( const tr_torrent * tor,
1687                           tr_file_index_t    file )
1688{
1689    tr_priority_t ret;
1690
1691    assert( tr_isTorrent( tor ) );
1692
1693    tr_torrentLock( tor );
1694    assert( tor );
1695    assert( file < tor->info.fileCount );
1696    ret = tor->info.files[file].priority;
1697    tr_torrentUnlock( tor );
1698
1699    return ret;
1700}
1701
1702tr_priority_t*
1703tr_torrentGetFilePriorities( const tr_torrent * tor )
1704{
1705    tr_file_index_t i;
1706    tr_priority_t * p;
1707
1708    assert( tr_isTorrent( tor ) );
1709
1710    tr_torrentLock( tor );
1711    p = tr_new0( tr_priority_t, tor->info.fileCount );
1712    for( i = 0; i < tor->info.fileCount; ++i )
1713        p[i] = tor->info.files[i].priority;
1714    tr_torrentUnlock( tor );
1715
1716    return p;
1717}
1718
1719/**
1720***  File DND
1721**/
1722
1723int
1724tr_torrentGetFileDL( const tr_torrent * tor,
1725                     tr_file_index_t    file )
1726{
1727    int doDownload;
1728
1729    assert( tr_isTorrent( tor ) );
1730
1731    tr_torrentLock( tor );
1732
1733    assert( file < tor->info.fileCount );
1734    doDownload = !tor->info.files[file].dnd;
1735
1736    tr_torrentUnlock( tor );
1737    return doDownload != 0;
1738}
1739
1740static void
1741setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
1742{
1743    tr_file *        file;
1744    const int        dnd = !doDownload;
1745    tr_piece_index_t firstPiece, firstPieceDND;
1746    tr_piece_index_t lastPiece, lastPieceDND;
1747    tr_file_index_t  i;
1748
1749    assert( tr_isTorrent( tor ) );
1750
1751    file = &tor->info.files[fileIndex];
1752    file->dnd = dnd;
1753    firstPiece = file->firstPiece;
1754    lastPiece = file->lastPiece;
1755
1756    /* can't set the first piece to DND unless
1757       every file using that piece is DND */
1758    firstPieceDND = dnd;
1759    if( fileIndex > 0 )
1760    {
1761        for( i = fileIndex - 1; firstPieceDND; --i )
1762        {
1763            if( tor->info.files[i].lastPiece != firstPiece )
1764                break;
1765            firstPieceDND = tor->info.files[i].dnd;
1766            if( !i )
1767                break;
1768        }
1769    }
1770
1771    /* can't set the last piece to DND unless
1772       every file using that piece is DND */
1773    lastPieceDND = dnd;
1774    for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
1775    {
1776        if( tor->info.files[i].firstPiece != lastPiece )
1777            break;
1778        lastPieceDND = tor->info.files[i].dnd;
1779    }
1780
1781    if( firstPiece == lastPiece )
1782    {
1783        tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
1784    }
1785    else
1786    {
1787        tr_piece_index_t pp;
1788        tor->info.pieces[firstPiece].dnd = firstPieceDND;
1789        tor->info.pieces[lastPiece].dnd = lastPieceDND;
1790        for( pp = firstPiece + 1; pp < lastPiece; ++pp )
1791            tor->info.pieces[pp].dnd = dnd;
1792    }
1793}
1794
1795void
1796tr_torrentInitFileDLs( tr_torrent      * tor,
1797                       tr_file_index_t * files,
1798                       tr_file_index_t   fileCount,
1799                       tr_bool           doDownload )
1800{
1801    tr_file_index_t i;
1802
1803    assert( tr_isTorrent( tor ) );
1804
1805    tr_torrentLock( tor );
1806
1807    for( i=0; i<fileCount; ++i )
1808        setFileDND( tor, files[i], doDownload );
1809    tr_cpInvalidateDND( &tor->completion );
1810    tor->needsSeedRatioCheck = TRUE;
1811
1812    tr_torrentUnlock( tor );
1813}
1814
1815void
1816tr_torrentSetFileDLs( tr_torrent *      tor,
1817                      tr_file_index_t * files,
1818                      tr_file_index_t   fileCount,
1819                      tr_bool           doDownload )
1820{
1821    assert( tr_isTorrent( tor ) );
1822
1823    tr_torrentLock( tor );
1824    tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
1825    tr_torrentSetDirty( tor );
1826    tr_torrentUnlock( tor );
1827}
1828
1829/***
1830****
1831***/
1832
1833tr_priority_t
1834tr_torrentGetPriority( const tr_torrent * tor )
1835{
1836    assert( tr_isTorrent( tor ) );
1837
1838    return tor->bandwidth->priority;
1839}
1840
1841void
1842tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
1843{
1844    assert( tr_isTorrent( tor ) );
1845    assert( tr_isPriority( priority ) );
1846
1847    if( tor->bandwidth->priority != priority )
1848    {
1849        tor->bandwidth->priority = priority;
1850
1851        tr_torrentSetDirty( tor );
1852    }
1853}
1854
1855/***
1856****
1857***/
1858
1859void
1860tr_torrentSetPeerLimit( tr_torrent * tor,
1861                        uint16_t     maxConnectedPeers )
1862{
1863    assert( tr_isTorrent( tor ) );
1864
1865    if ( tor->maxConnectedPeers != maxConnectedPeers )
1866    {
1867        tor->maxConnectedPeers = maxConnectedPeers;
1868
1869        tr_torrentSetDirty( tor );
1870    }
1871}
1872
1873uint16_t
1874tr_torrentGetPeerLimit( const tr_torrent * tor )
1875{
1876    assert( tr_isTorrent( tor ) );
1877
1878    return tor->maxConnectedPeers;
1879}
1880
1881/***
1882****
1883***/
1884
1885tr_block_index_t
1886_tr_block( const tr_torrent * tor,
1887           tr_piece_index_t   index,
1888           uint32_t           offset )
1889{
1890    tr_block_index_t ret;
1891
1892    assert( tr_isTorrent( tor ) );
1893
1894    ret = index;
1895    ret *= ( tor->info.pieceSize / tor->blockSize );
1896    ret += offset / tor->blockSize;
1897    return ret;
1898}
1899
1900tr_bool
1901tr_torrentReqIsValid( const tr_torrent * tor,
1902                      tr_piece_index_t   index,
1903                      uint32_t           offset,
1904                      uint32_t           length )
1905{
1906    int err = 0;
1907
1908    assert( tr_isTorrent( tor ) );
1909
1910    if( index >= tor->info.pieceCount )
1911        err = 1;
1912    else if( length < 1 )
1913        err = 2;
1914    else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
1915        err = 3;
1916    else if( length > MAX_BLOCK_SIZE )
1917        err = 4;
1918    else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
1919        err = 5;
1920
1921    if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
1922                              (unsigned long)index,
1923                              (unsigned long)offset,
1924                              (unsigned long)length,
1925                              err );
1926
1927    return !err;
1928}
1929
1930uint64_t
1931tr_pieceOffset( const tr_torrent * tor,
1932                tr_piece_index_t   index,
1933                uint32_t           offset,
1934                uint32_t           length )
1935{
1936    uint64_t ret;
1937
1938    assert( tr_isTorrent( tor ) );
1939
1940    ret = tor->info.pieceSize;
1941    ret *= index;
1942    ret += offset;
1943    ret += length;
1944    return ret;
1945}
1946
1947/***
1948****
1949***/
1950
1951void
1952tr_torrentSetPieceChecked( tr_torrent        * tor,
1953                           tr_piece_index_t    piece,
1954                           tr_bool             isChecked )
1955{
1956    assert( tr_isTorrent( tor ) );
1957
1958    if( isChecked )
1959        tr_bitfieldAdd( &tor->checkedPieces, piece );
1960    else
1961        tr_bitfieldRem( &tor->checkedPieces, piece );
1962}
1963
1964void
1965tr_torrentSetFileChecked( tr_torrent *    tor,
1966                          tr_file_index_t fileIndex,
1967                          tr_bool         isChecked )
1968{
1969    const tr_file *        file = &tor->info.files[fileIndex];
1970    const tr_piece_index_t begin = file->firstPiece;
1971    const tr_piece_index_t end = file->lastPiece + 1;
1972
1973    assert( tr_isTorrent( tor ) );
1974
1975    if( isChecked )
1976        tr_bitfieldAddRange( &tor->checkedPieces, begin, end );
1977    else
1978        tr_bitfieldRemRange( &tor->checkedPieces, begin, end );
1979}
1980
1981tr_bool
1982tr_torrentIsFileChecked( const tr_torrent * tor,
1983                         tr_file_index_t    fileIndex )
1984{
1985    const tr_file *        file = &tor->info.files[fileIndex];
1986    const tr_piece_index_t begin = file->firstPiece;
1987    const tr_piece_index_t end = file->lastPiece + 1;
1988    tr_piece_index_t       i;
1989    tr_bool                isChecked = TRUE;
1990
1991    assert( tr_isTorrent( tor ) );
1992
1993    for( i = begin; isChecked && i < end; ++i )
1994        if( !tr_torrentIsPieceChecked( tor, i ) )
1995            isChecked = FALSE;
1996
1997    return isChecked;
1998}
1999
2000void
2001tr_torrentUncheck( tr_torrent * tor )
2002{
2003    assert( tr_isTorrent( tor ) );
2004
2005    tr_bitfieldRemRange( &tor->checkedPieces, 0, tor->info.pieceCount );
2006}
2007
2008int
2009tr_torrentCountUncheckedPieces( const tr_torrent * tor )
2010{
2011    assert( tr_isTorrent( tor ) );
2012
2013    return tor->info.pieceCount - tr_bitfieldCountTrueBits( &tor->checkedPieces );
2014}
2015
2016time_t*
2017tr_torrentGetMTimes( const tr_torrent * tor, size_t * setme_n )
2018{
2019    size_t       i;
2020    const size_t n = tor->info.fileCount;
2021    time_t *     m = tr_new0( time_t, n );
2022
2023    assert( tr_isTorrent( tor ) );
2024
2025    for( i = 0; i < n; ++i )
2026    {
2027        struct stat sb;
2028        char * path = tr_torrentFindFile( tor, i );
2029        if( ( path != NULL ) && !stat( path, &sb ) && S_ISREG( sb.st_mode ) )
2030        {
2031#ifdef SYS_DARWIN
2032            m[i] = sb.st_mtimespec.tv_sec;
2033#else
2034            m[i] = sb.st_mtime;
2035#endif
2036        }
2037        tr_free( path );
2038    }
2039
2040    *setme_n = n;
2041    return m;
2042}
2043
2044/***
2045****
2046***/
2047
2048tr_announce_list_err
2049tr_torrentSetAnnounceList( tr_torrent *            tor,
2050                           const tr_tracker_info * trackers,
2051                           int                     trackerCount )
2052{
2053    int i, j;
2054    tr_benc metainfo;
2055
2056    assert( tr_isTorrent( tor ) );
2057
2058    /* look for bad URLs */
2059    for( i=0; i<trackerCount; ++i )
2060        if( !tr_httpIsValidURL( trackers[i].announce ) )
2061            return TR_ANNOUNCE_LIST_HAS_BAD;
2062
2063    /* look for duplicates */
2064    for( i=0; i<trackerCount; ++i )
2065        for( j=0; j<trackerCount; ++j )
2066            if( ( i != j ) && ( !strcmp( trackers[i].announce, trackers[j].announce ) ) )
2067                return TR_ANNOUNCE_LIST_HAS_DUPLICATES;
2068
2069    /* save to the .torrent file */
2070    if( !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2071    {
2072        int       i;
2073        int       prevTier = -1;
2074        tr_benc * tier = NULL;
2075        tr_benc * announceList;
2076        tr_info   tmpInfo;
2077
2078        /* remove the old fields */
2079        tr_bencDictRemove( &metainfo, "announce" );
2080        tr_bencDictRemove( &metainfo, "announce-list" );
2081
2082        /* add the new fields */
2083        tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2084        announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2085        for( i = 0; i < trackerCount; ++i ) {
2086            if( prevTier != trackers[i].tier ) {
2087                prevTier = trackers[i].tier;
2088                tier = tr_bencListAddList( announceList, 0 );
2089            }
2090            tr_bencListAddStr( tier, trackers[i].announce );
2091        }
2092
2093        /* try to parse it back again, to make sure it's good */
2094        memset( &tmpInfo, 0, sizeof( tr_info ) );
2095        if( tr_metainfoParse( tor->session, &tmpInfo, &metainfo ) )
2096        {
2097            /* it's good, so keep these new trackers and free the old ones */
2098
2099            tr_info swap;
2100            swap.trackers = tor->info.trackers;
2101            swap.trackerCount = tor->info.trackerCount;
2102            tor->info.trackers = tmpInfo.trackers;
2103            tor->info.trackerCount = tmpInfo.trackerCount;
2104            tmpInfo.trackers = swap.trackers;
2105            tmpInfo.trackerCount = swap.trackerCount;
2106
2107            tr_metainfoFree( &tmpInfo );
2108            tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2109        }
2110
2111        /* cleanup */
2112        tr_bencFree( &metainfo );
2113
2114        /* tell the announcer to reload this torrent's tracker list */
2115        tr_announcerResetTorrent( tor->session->announcer, tor );
2116    }
2117
2118    return TR_ANNOUNCE_LIST_OK;
2119}
2120
2121/**
2122***
2123**/
2124
2125void
2126tr_torrentSetAddedDate( tr_torrent * tor,
2127                        time_t       t )
2128{
2129    assert( tr_isTorrent( tor ) );
2130
2131    tor->addedDate = t;
2132    tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2133}
2134
2135void
2136tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2137{
2138    assert( tr_isTorrent( tor ) );
2139
2140    tor->activityDate = t;
2141    tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2142}
2143
2144void
2145tr_torrentSetDoneDate( tr_torrent * tor,
2146                       time_t       t )
2147{
2148    assert( tr_isTorrent( tor ) );
2149
2150    tor->doneDate = t;
2151    tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2152}
2153
2154/**
2155***
2156**/
2157
2158uint64_t
2159tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2160{
2161    tr_file_index_t i;
2162    uint64_t bytesLeft = 0;
2163
2164    assert( tr_isTorrent( tor ) );
2165
2166    for( i=0; i<tor->info.fileCount; ++i )
2167    {
2168        if( !tor->info.files[i].dnd )
2169        {
2170            struct stat sb;
2171            const uint64_t length = tor->info.files[i].length;
2172            char * path = tr_torrentFindFile( tor, i );
2173
2174            bytesLeft += length;
2175
2176            if( ( path != NULL ) && !stat( path, &sb )
2177                                 && S_ISREG( sb.st_mode )
2178                                 && ( (uint64_t)sb.st_size <= length ) )
2179                bytesLeft -= sb.st_size;
2180
2181            tr_free( path );
2182        }
2183    }
2184
2185    return bytesLeft;
2186}
2187
2188/****
2189*****  Removing the torrent's local data
2190****/
2191
2192static int
2193vstrcmp( const void * a, const void * b )
2194{
2195    return strcmp( a, b );
2196}
2197
2198static int
2199compareLongestFirst( const void * a, const void * b )
2200{
2201    const size_t alen = strlen( a );
2202    const size_t blen = strlen( b );
2203
2204    if( alen != blen )
2205        return alen > blen ? -1 : 1;
2206
2207    return vstrcmp( a, b );
2208}
2209
2210static void
2211addDirtyFile( const char  * root,
2212              const char  * filename,
2213              tr_ptrArray * dirtyFolders )
2214{
2215    char * dir = tr_dirname( filename );
2216
2217    /* add the parent folders to dirtyFolders until we reach the root or a known-dirty */
2218    while (     ( dir != NULL )
2219             && ( strlen( root ) <= strlen( dir ) )
2220             && ( tr_ptrArrayFindSorted( dirtyFolders, dir, vstrcmp ) == NULL ) )
2221    {
2222        char * tmp;
2223        tr_ptrArrayInsertSorted( dirtyFolders, tr_strdup( dir ), vstrcmp );
2224
2225        tmp = tr_dirname( dir );
2226        tr_free( dir );
2227        dir = tmp;
2228    }
2229
2230    tr_free( dir );
2231}
2232
2233static void
2234walkLocalData( const tr_torrent * tor,
2235               const char       * root,
2236               const char       * dir,
2237               const char       * base,
2238               tr_ptrArray      * torrentFiles,
2239               tr_ptrArray      * folders,
2240               tr_ptrArray      * dirtyFolders )
2241{
2242    int i;
2243    struct stat sb;
2244    char * buf;
2245
2246    assert( tr_isTorrent( tor ) );
2247
2248    buf = tr_buildPath( dir, base, NULL );
2249    i = stat( buf, &sb );
2250    if( !i )
2251    {
2252        DIR * odir = NULL;
2253
2254        if( S_ISDIR( sb.st_mode ) && ( ( odir = opendir ( buf ) ) ) )
2255        {
2256            struct dirent *d;
2257            tr_ptrArrayInsertSorted( folders, tr_strdup( buf ), vstrcmp );
2258            for( d = readdir( odir ); d != NULL; d = readdir( odir ) )
2259                if( d->d_name && d->d_name[0] != '.' ) /* skip dotfiles */
2260                    walkLocalData( tor, root, buf, d->d_name, torrentFiles, folders, dirtyFolders );
2261            closedir( odir );
2262        }
2263        else if( S_ISREG( sb.st_mode ) && ( sb.st_size > 0 ) )
2264        {
2265            const char * sub = buf + strlen( tor->currentDir ) + strlen( TR_PATH_DELIMITER_STR );
2266            const tr_bool isTorrentFile = tr_ptrArrayFindSorted( torrentFiles, sub, vstrcmp ) != NULL;
2267            if( !isTorrentFile )
2268                addDirtyFile( root, buf, dirtyFolders );
2269        }
2270    }
2271
2272    tr_free( buf );
2273}
2274
2275static void
2276deleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2277{
2278    int i, n;
2279    char ** s;
2280    tr_file_index_t f;
2281    tr_ptrArray torrentFiles = TR_PTR_ARRAY_INIT;
2282    tr_ptrArray folders      = TR_PTR_ARRAY_INIT;
2283    tr_ptrArray dirtyFolders = TR_PTR_ARRAY_INIT; /* dirty == contains non-torrent files */
2284
2285    const char * firstFile = tor->info.files[0].name;
2286    const char * cpch = strchr( firstFile, TR_PATH_DELIMITER );
2287    char * tmp = cpch ? tr_strndup( firstFile, cpch - firstFile ) : NULL;
2288    char * root = tr_buildPath( tor->currentDir, tmp, NULL );
2289
2290    assert( tr_isTorrent( tor ) );
2291
2292    for( f=0; f<tor->info.fileCount; ++f ) {
2293        tr_ptrArrayInsertSorted( &torrentFiles, tr_strdup( tor->info.files[f].name ), vstrcmp );
2294        tr_ptrArrayInsertSorted( &torrentFiles, tr_torrentBuildPartial( tor, f ), vstrcmp );
2295    }
2296
2297    /* build the set of folders and dirtyFolders */
2298    walkLocalData( tor, root, root, NULL, &torrentFiles, &folders, &dirtyFolders );
2299
2300    /* try to remove entire folders first, so that the recycle bin will be tidy */
2301    s = (char**) tr_ptrArrayPeek( &folders, &n );
2302    for( i=0; i<n; ++i )
2303        if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2304            fileFunc( s[i] );
2305
2306    /* now blow away any remaining torrent files, such as torrent files in dirty folders */
2307    for( f=0; f<tor->info.fileCount; ++f ) {
2308        char * path = tr_buildPath( tor->currentDir, tor->info.files[f].name, NULL );
2309        fileFunc( path );
2310        tr_free( path );
2311    }
2312
2313    /* Now clean out the directories left empty from the previous step.
2314     * Work from deepest to shallowest s.t. lower folders
2315     * won't prevent the upper folders from being deleted */
2316    {
2317        tr_ptrArray cleanFolders = TR_PTR_ARRAY_INIT;
2318        s = (char**) tr_ptrArrayPeek( &folders, &n );
2319        for( i=0; i<n; ++i )
2320            if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2321                tr_ptrArrayInsertSorted( &cleanFolders, s[i], compareLongestFirst );
2322        s = (char**) tr_ptrArrayPeek( &cleanFolders, &n );
2323        for( i=0; i<n; ++i )
2324            fileFunc( s[i] );
2325        tr_ptrArrayDestruct( &cleanFolders, NULL );
2326    }
2327
2328    /* cleanup */
2329    tr_ptrArrayDestruct( &dirtyFolders, tr_free );
2330    tr_ptrArrayDestruct( &folders, tr_free );
2331    tr_ptrArrayDestruct( &torrentFiles, tr_free );
2332    tr_free( root );
2333    tr_free( tmp );
2334}
2335
2336void
2337tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2338{
2339    assert( tr_isTorrent( tor ) );
2340
2341    if( fileFunc == NULL )
2342        fileFunc = remove;
2343
2344    /* close all the files because we're about to delete them */
2345    tr_fdTorrentClose( tor->uniqueId );
2346
2347    if( tor->info.fileCount > 1 )
2348        deleteLocalData( tor, fileFunc );
2349    else {
2350        /* torrent only has one file */
2351        char * path = tr_torrentFindFile( tor, 0 );
2352        fileFunc( path );
2353        tr_free( path );
2354    }
2355}
2356
2357/***
2358****
2359***/
2360
2361struct LocationData
2362{
2363    tr_bool move_from_old_location;
2364    int * setme_state;
2365    double * setme_progress;
2366    char * location;
2367    tr_torrent * tor;
2368};
2369
2370static void
2371setLocation( void * vdata )
2372{
2373    tr_bool err = FALSE;
2374    tr_bool verify_needed = FALSE;
2375    struct LocationData * data = vdata;
2376    tr_torrent * tor = data->tor;
2377    const tr_bool do_move = data->move_from_old_location;
2378    const char * location = data->location;
2379    double bytesHandled = 0;
2380
2381    assert( tr_isTorrent( tor ) );
2382
2383    if( strcmp( location, tor->currentDir ) )
2384    {
2385        tr_file_index_t i;
2386
2387        /* bad idea to move files while they're being verified... */
2388        tr_verifyRemove( tor );
2389
2390        /* if the torrent is running, stop it and set a flag to
2391         * restart after we're done */
2392        if( tor->isRunning )
2393        {
2394            tr_torrentStop( tor );
2395            tor->startAfterVerify = TRUE;
2396        }
2397
2398        /* try to move the files.
2399         * FIXME: there are still all kinds of nasty cases, like what
2400         * if the target directory runs out of space halfway through... */
2401        for( i=0; !err && i<tor->info.fileCount; ++i )
2402        {
2403            const tr_file * f = &tor->info.files[i];
2404            const char * oldbase;
2405            char * sub;
2406            if( tr_torrentFindFile2( tor, i, &oldbase, &sub ) )
2407            {
2408                char * oldpath = tr_buildPath( oldbase, sub, NULL );
2409                char * newpath = tr_buildPath( location, sub, NULL );
2410
2411                if( do_move )
2412                {
2413                    errno = 0;
2414                    tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2415                    if( rename( oldpath, newpath ) )
2416                    {
2417                        verify_needed = TRUE;
2418                        if( tr_moveFile( oldpath, newpath ) )
2419                        {
2420                            err = TRUE;
2421                            tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2422                                            oldpath, newpath, tr_strerror( errno ) );
2423                        }
2424                    }
2425                }
2426
2427                tr_free( newpath );
2428                tr_free( oldpath );
2429                tr_free( sub );
2430            }
2431
2432            if( data->setme_progress )
2433            {
2434                bytesHandled += f->length;
2435                *data->setme_progress = bytesHandled / tor->info.totalSize;
2436            }
2437        }
2438
2439        if( !err )
2440        {
2441            /* blow away the leftover subdirectories in the old location */
2442            if( do_move && verify_needed )
2443                tr_torrentDeleteLocalData( tor, remove );
2444
2445            /* set the new location and reverify */
2446            tr_torrentSetDownloadDir( tor, location );
2447            if( verify_needed )
2448                tr_torrentVerify( tor );
2449        }
2450    }
2451
2452    if( data->setme_state )
2453        *data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2454
2455    /* cleanup */
2456    tr_free( data->location );
2457    tr_free( data );
2458}
2459
2460void
2461tr_torrentSetLocation( tr_torrent  * tor,
2462                       const char  * location,
2463                       tr_bool       move_from_old_location,
2464                       double      * setme_progress,
2465                       int         * setme_state )
2466{
2467    struct LocationData * data;
2468
2469    assert( tr_isTorrent( tor ) );
2470
2471    if( setme_state )
2472        *setme_state = TR_LOC_MOVING;
2473    if( setme_progress )
2474        *setme_progress = 0;
2475
2476    /* run this in the libtransmission thread */
2477    data = tr_new( struct LocationData, 1 );
2478    data->tor = tor;
2479    data->location = tr_strdup( location );
2480    data->move_from_old_location = move_from_old_location;
2481    data->setme_state = setme_state;
2482    data->setme_progress = setme_progress;
2483    tr_runInEventThread( tor->session, setLocation, data );
2484}
2485
2486/***
2487****
2488***/
2489
2490void
2491tr_torrentCheckSeedRatio( tr_torrent * tor )
2492{
2493    double seedRatio;
2494
2495    assert( tr_isTorrent( tor ) );
2496
2497    /* if we're seeding and we've reached our seed ratio limit, stop the torrent */
2498    if( tor->isRunning && tr_torrentIsSeed( tor ) && tr_torrentGetSeedRatio( tor, &seedRatio ) )
2499    {
2500        const uint64_t up = tor->uploadedCur + tor->uploadedPrev;
2501        uint64_t down = tor->downloadedCur + tor->downloadedPrev;
2502        double ratio;
2503
2504        /* maybe we're the initial seeder and never downloaded anything... */
2505        if( down == 0 )
2506            down = tr_cpHaveValid( &tor->completion );
2507
2508        ratio = tr_getRatio( up, down );
2509
2510        if( ratio >= seedRatio || ratio == TR_RATIO_INF )
2511        {
2512            tr_torrentStop( tor );
2513
2514            /* set to no ratio limit to allow easy restarting */
2515            tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
2516
2517            /* maybe notify the client */
2518            if( tor->ratio_limit_hit_func != NULL )
2519                tor->ratio_limit_hit_func( tor, tor->ratio_limit_hit_func_user_data );
2520        }
2521    }
2522}
2523
2524/***
2525****
2526***/
2527
2528void
2529tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
2530{
2531    char * sub;
2532    const char * base;
2533
2534    /* close the file so that we can reopen in read-only mode as needed */
2535    tr_fdFileClose( tor, fileNum );
2536
2537    /* if the torrent's filename on disk isn't the same as the one in the metadata,
2538     * then it's been modified to denote that it was a partial file.
2539     * Now that it's complete, use the proper filename. */
2540    if( tr_torrentFindFile2( tor, fileNum, &base, &sub ) )
2541    {
2542        const tr_file * file = &tor->info.files[fileNum];
2543
2544        if( strcmp( sub, file->name ) )
2545        {
2546            char * oldpath = tr_buildPath( base, sub, NULL );
2547            char * newpath = tr_buildPath( base, file->name, NULL );
2548
2549            if( rename( oldpath, newpath ) )
2550                tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
2551
2552            tr_free( newpath );
2553            tr_free( oldpath );
2554        }
2555
2556        tr_free( sub );
2557    }
2558}
2559
2560/***
2561****
2562***/
2563
2564static tr_bool
2565fileExists( const char * filename )
2566{
2567    struct stat sb;
2568    const tr_bool ok = !stat( filename, &sb );
2569    return ok;
2570}
2571
2572tr_bool
2573tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
2574                     const char ** base, char ** subpath )
2575{
2576    char * part;
2577    const tr_file * file;
2578    const char * b = NULL;
2579    const char * s = NULL;
2580
2581    assert( tr_isTorrent( tor ) );
2582    assert( fileNum < tor->info.fileCount );
2583
2584    file = &tor->info.files[fileNum];
2585    part = tr_torrentBuildPartial( tor, fileNum );
2586
2587    if( b == NULL ) {
2588        char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
2589        if( fileExists( filename ) ) {
2590            b = tor->downloadDir;
2591            s = file->name;
2592        }
2593        tr_free( filename );
2594    }
2595
2596    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
2597        char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
2598        if( fileExists( filename ) ) {
2599            b = tor->incompleteDir;
2600            s = file->name;
2601        }
2602        tr_free( filename );
2603    }
2604
2605    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
2606        char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
2607        if( fileExists( filename ) ) {
2608            b = tor->incompleteDir;
2609            s = part;
2610        }
2611        tr_free( filename );
2612    }
2613
2614    if( b == NULL) {
2615        char * filename = tr_buildPath( tor->downloadDir, part, NULL );
2616        if( fileExists( filename ) ) {
2617            b = tor->downloadDir;
2618            s = part;
2619        }
2620        tr_free( filename );
2621    }
2622
2623    if( base != NULL )
2624        *base = b;
2625    if( subpath != NULL )
2626        *subpath = tr_strdup( s );
2627
2628    tr_free( part );
2629    return b != NULL;
2630}
2631
2632
2633char*
2634tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
2635{
2636    char * subpath;
2637    char * ret = NULL;
2638    const char * base;
2639
2640    if( tr_torrentFindFile2( tor, fileNum, &base, &subpath ) )
2641    {
2642        ret = tr_buildPath( base, subpath, NULL );
2643        tr_free( subpath );
2644    }
2645
2646    return ret;
2647}
2648
2649/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
2650static void
2651refreshCurrentDir( tr_torrent * tor )
2652{
2653    const char * dir = NULL;
2654    char * sub;
2655
2656    if( tor->incompleteDir == NULL )
2657        dir = tor->downloadDir;
2658    else if( !tr_torrentFindFile2( tor, 0, &dir, &sub ) )
2659        dir = tor->incompleteDir;
2660
2661    assert( dir != NULL );
2662    assert( ( dir == tor->downloadDir ) || ( dir == tor->incompleteDir ) );
2663    tor->currentDir = dir;
2664}
2665
2666char*
2667tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
2668{
2669    return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
2670}
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