source: trunk/libtransmission/torrent.c @ 12280

Last change on this file since 12280 was 12280, checked in by jordan, 11 years ago

(trunk libT) use aggregation for the tr_bandwidth objects owned by tr_session and tr_torrent

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1/*
2 * This file Copyright (C) Mnemosyne LLC
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 12280 2011-03-31 14:53:22Z jordan $
11 */
12
13#include <signal.h> /* signal() */
14#include <sys/types.h> /* stat */
15#include <sys/stat.h> /* stat */
16#ifndef WIN32
17 #include <sys/wait.h> /* wait() */
18#else
19 #include <process.h>
20 #define waitpid(pid, status, options)  _cwait(status, pid, WAIT_CHILD)
21#endif
22#include <unistd.h> /* stat */
23#include <dirent.h>
24
25#include <assert.h>
26#include <math.h>
27#include <stdarg.h>
28#include <string.h> /* memcmp */
29#include <stdlib.h> /* qsort */
30#include <stdio.h> /* remove() */
31
32#include <event2/util.h> /* evutil_vsnprintf() */
33
34#include "transmission.h"
35#include "announcer.h"
36#include "bandwidth.h"
37#include "bencode.h"
38#include "cache.h"
39#include "completion.h"
40#include "crypto.h" /* for tr_sha1 */
41#include "resume.h"
42#include "fdlimit.h" /* tr_fdTorrentClose */
43#include "inout.h" /* tr_ioTestPiece() */
44#include "magnet.h"
45#include "metainfo.h"
46#include "peer-common.h" /* MAX_BLOCK_SIZE */
47#include "peer-mgr.h"
48#include "platform.h" /* TR_PATH_DELIMITER_STR */
49#include "ptrarray.h"
50#include "session.h"
51#include "torrent.h"
52#include "torrent-magnet.h"
53#include "trevent.h" /* tr_runInEventThread() */
54#include "utils.h"
55#include "verify.h"
56#include "version.h"
57
58/***
59****
60***/
61
62#define tr_deeplog_tor( tor, ... ) \
63    do { \
64        if( tr_deepLoggingIsActive( ) ) \
65            tr_deepLog( __FILE__, __LINE__, tr_torrentName( tor ), __VA_ARGS__ ); \
66    } while( 0 )
67
68/***
69****
70***/
71
72const char *
73tr_torrentName( const tr_torrent * tor )
74{
75    assert( tr_isTorrent( tor ) );
76
77    return tor->info.name;
78}
79
80int
81tr_torrentId( const tr_torrent * tor )
82{
83    return tor->uniqueId;
84}
85
86tr_torrent*
87tr_torrentFindFromId( tr_session * session, int id )
88{
89    tr_torrent * tor = NULL;
90
91    while(( tor = tr_torrentNext( session, tor )))
92        if( tor->uniqueId == id )
93            return tor;
94
95    return NULL;
96}
97
98tr_torrent*
99tr_torrentFindFromHashString( tr_session *  session, const char * str )
100{
101    tr_torrent * tor = NULL;
102
103    while(( tor = tr_torrentNext( session, tor )))
104        if( !evutil_ascii_strcasecmp( str, tor->info.hashString ) )
105            return tor;
106
107    return NULL;
108}
109
110tr_torrent*
111tr_torrentFindFromHash( tr_session * session, const uint8_t * torrentHash )
112{
113    tr_torrent * tor = NULL;
114
115    while(( tor = tr_torrentNext( session, tor )))
116        if( *tor->info.hash == *torrentHash )
117            if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
118                return tor;
119
120    return NULL;
121}
122
123tr_torrent*
124tr_torrentFindFromMagnetLink( tr_session * session, const char * magnet )
125{
126    tr_magnet_info * info;
127    tr_torrent * tor = NULL;
128
129    if(( info = tr_magnetParse( magnet )))
130    {
131        tor = tr_torrentFindFromHash( session, info->hash );
132        tr_magnetFree( info );
133    }
134
135    return tor;
136}
137
138tr_torrent*
139tr_torrentFindFromObfuscatedHash( tr_session * session,
140                                  const uint8_t * obfuscatedTorrentHash )
141{
142    tr_torrent * tor = NULL;
143
144    while(( tor = tr_torrentNext( session, tor )))
145        if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
146                     SHA_DIGEST_LENGTH ) )
147            return tor;
148
149    return NULL;
150}
151
152bool
153tr_torrentIsPieceTransferAllowed( const tr_torrent  * tor,
154                                  tr_direction        direction )
155{
156    int limit;
157    bool allowed = true;
158
159    if( tr_torrentUsesSpeedLimit( tor, direction ) )
160        if( tr_torrentGetSpeedLimit_Bps( tor, direction ) <= 0 )
161            allowed = false;
162
163    if( tr_torrentUsesSessionLimits( tor ) )
164        if( tr_sessionGetActiveSpeedLimit_Bps( tor->session, direction, &limit ) )
165            if( limit <= 0 )
166                allowed = false;
167
168    return allowed;
169}
170
171/***
172****  PER-TORRENT UL / DL SPEEDS
173***/
174
175void
176tr_torrentSetSpeedLimit_Bps( tr_torrent * tor, tr_direction dir, int Bps )
177{
178    assert( tr_isTorrent( tor ) );
179    assert( tr_isDirection( dir ) );
180    assert( Bps >= 0 );
181
182    if( tr_bandwidthSetDesiredSpeed_Bps( &tor->bandwidth, dir, Bps ) )
183        tr_torrentSetDirty( tor );
184}
185void
186tr_torrentSetSpeedLimit_KBps( tr_torrent * tor, tr_direction dir, int KBps )
187{
188    tr_torrentSetSpeedLimit_Bps( tor, dir, toSpeedBytes( KBps ) );
189}
190
191int
192tr_torrentGetSpeedLimit_Bps( const tr_torrent * tor, tr_direction dir )
193{
194    assert( tr_isTorrent( tor ) );
195    assert( tr_isDirection( dir ) );
196
197    return tr_bandwidthGetDesiredSpeed_Bps( &tor->bandwidth, dir );
198}
199int
200tr_torrentGetSpeedLimit_KBps( const tr_torrent * tor, tr_direction dir )
201{
202    return toSpeedKBps( tr_torrentGetSpeedLimit_Bps( tor, dir ) );
203}
204
205void
206tr_torrentUseSpeedLimit( tr_torrent * tor, tr_direction dir, bool do_use )
207{
208    assert( tr_isTorrent( tor ) );
209    assert( tr_isDirection( dir ) );
210
211    if( tr_bandwidthSetLimited( &tor->bandwidth, dir, do_use ) )
212        tr_torrentSetDirty( tor );
213}
214
215bool
216tr_torrentUsesSpeedLimit( const tr_torrent * tor, tr_direction dir )
217{
218    assert( tr_isTorrent( tor ) );
219    assert( tr_isDirection( dir ) );
220
221    return tr_bandwidthIsLimited( &tor->bandwidth, dir );
222}
223
224void
225tr_torrentUseSessionLimits( tr_torrent * tor, bool doUse )
226{
227    bool changed;
228
229    assert( tr_isTorrent( tor ) );
230
231    changed = tr_bandwidthHonorParentLimits( &tor->bandwidth, TR_UP, doUse );
232    changed |= tr_bandwidthHonorParentLimits( &tor->bandwidth, TR_DOWN, doUse );
233
234    if( changed )
235        tr_torrentSetDirty( tor );
236}
237
238bool
239tr_torrentUsesSessionLimits( const tr_torrent * tor )
240{
241    assert( tr_isTorrent( tor ) );
242
243    return tr_bandwidthAreParentLimitsHonored( &tor->bandwidth, TR_UP );
244}
245
246/***
247****
248***/
249
250void
251tr_torrentSetRatioMode( tr_torrent *  tor, tr_ratiolimit mode )
252{
253    assert( tr_isTorrent( tor ) );
254    assert( mode==TR_RATIOLIMIT_GLOBAL || mode==TR_RATIOLIMIT_SINGLE || mode==TR_RATIOLIMIT_UNLIMITED  );
255
256    if( mode != tor->ratioLimitMode )
257    {
258        tor->ratioLimitMode = mode;
259
260        tr_torrentSetDirty( tor );
261    }
262}
263
264tr_ratiolimit
265tr_torrentGetRatioMode( const tr_torrent * tor )
266{
267    assert( tr_isTorrent( tor ) );
268
269    return tor->ratioLimitMode;
270}
271
272void
273tr_torrentSetRatioLimit( tr_torrent * tor, double desiredRatio )
274{
275    assert( tr_isTorrent( tor ) );
276
277    if( (int)(desiredRatio*100.0) != (int)(tor->desiredRatio*100.0) )
278    {
279        tor->desiredRatio = desiredRatio;
280
281        tr_torrentSetDirty( tor );
282    }
283}
284
285double
286tr_torrentGetRatioLimit( const tr_torrent * tor )
287{
288    assert( tr_isTorrent( tor ) );
289
290    return tor->desiredRatio;
291}
292
293bool
294tr_torrentGetSeedRatio( const tr_torrent * tor, double * ratio )
295{
296    bool isLimited;
297
298    switch( tr_torrentGetRatioMode( tor ) )
299    {
300        case TR_RATIOLIMIT_SINGLE:
301            isLimited = true;
302            if( ratio )
303                *ratio = tr_torrentGetRatioLimit( tor );
304            break;
305
306        case TR_RATIOLIMIT_GLOBAL:
307            isLimited = tr_sessionIsRatioLimited( tor->session );
308            if( isLimited && ratio )
309                *ratio = tr_sessionGetRatioLimit( tor->session );
310            break;
311
312        default: /* TR_RATIOLIMIT_UNLIMITED */
313            isLimited = false;
314            break;
315    }
316
317    return isLimited;
318}
319
320/* returns true if the seed ratio applies --
321 * it applies if the torrent's a seed AND it has a seed ratio set */
322static bool
323tr_torrentGetSeedRatioBytes( tr_torrent  * tor,
324                             uint64_t    * setmeLeft,
325                             uint64_t    * setmeGoal )
326{
327    double seedRatio;
328    bool seedRatioApplies = false;
329
330    if( tr_torrentGetSeedRatio( tor, &seedRatio ) )
331    {
332        const uint64_t u = tor->uploadedCur + tor->uploadedPrev;
333        const uint64_t d = tor->downloadedCur + tor->downloadedPrev;
334        const uint64_t baseline = d ? d : tr_cpSizeWhenDone( &tor->completion );
335        const uint64_t goal = baseline * seedRatio;
336        if( setmeLeft ) *setmeLeft = goal > u ? goal - u : 0;
337        if( setmeGoal ) *setmeGoal = goal;
338        seedRatioApplies = tr_torrentIsSeed( tor );
339    }
340
341    return seedRatioApplies;
342}
343
344static bool
345tr_torrentIsSeedRatioDone( tr_torrent * tor )
346{
347    uint64_t bytesLeft;
348    return tr_torrentGetSeedRatioBytes( tor, &bytesLeft, NULL ) && !bytesLeft;
349}
350
351/***
352****
353***/
354
355void
356tr_torrentSetIdleMode( tr_torrent *  tor, tr_idlelimit mode )
357{
358    assert( tr_isTorrent( tor ) );
359    assert( mode==TR_IDLELIMIT_GLOBAL || mode==TR_IDLELIMIT_SINGLE || mode==TR_IDLELIMIT_UNLIMITED  );
360
361    if( mode != tor->idleLimitMode )
362    {
363        tor->idleLimitMode = mode;
364
365        tr_torrentSetDirty( tor );
366    }
367}
368
369tr_idlelimit
370tr_torrentGetIdleMode( const tr_torrent * tor )
371{
372    assert( tr_isTorrent( tor ) );
373
374    return tor->idleLimitMode;
375}
376
377void
378tr_torrentSetIdleLimit( tr_torrent * tor, uint16_t idleMinutes )
379{
380    assert( tr_isTorrent( tor ) );
381
382    if( idleMinutes > 0 )
383    {
384        tor->idleLimitMinutes = idleMinutes;
385
386        tr_torrentSetDirty( tor );
387    }
388}
389
390uint16_t
391tr_torrentGetIdleLimit( const tr_torrent * tor )
392{
393    assert( tr_isTorrent( tor ) );
394
395    return tor->idleLimitMinutes;
396}
397
398bool
399tr_torrentGetSeedIdle( const tr_torrent * tor, uint16_t * idleMinutes )
400{
401    bool isLimited;
402
403    switch( tr_torrentGetIdleMode( tor ) )
404    {
405        case TR_IDLELIMIT_SINGLE:
406            isLimited = true;
407            if( idleMinutes )
408                *idleMinutes = tr_torrentGetIdleLimit( tor );
409            break;
410
411        case TR_IDLELIMIT_GLOBAL:
412            isLimited = tr_sessionIsIdleLimited( tor->session );
413            if( isLimited && idleMinutes )
414                *idleMinutes = tr_sessionGetIdleLimit( tor->session );
415            break;
416
417        default: /* TR_IDLELIMIT_UNLIMITED */
418            isLimited = false;
419            break;
420    }
421
422    return isLimited;
423}
424
425static bool
426tr_torrentIsSeedIdleLimitDone( tr_torrent * tor )
427{
428    uint16_t idleMinutes;
429    return tr_torrentGetSeedIdle( tor, &idleMinutes )
430        && difftime(tr_time(), MAX(tor->startDate, tor->activityDate)) >= idleMinutes * 60u;
431}
432
433/***
434****
435***/
436
437void
438tr_torrentCheckSeedLimit( tr_torrent * tor )
439{
440    assert( tr_isTorrent( tor ) );
441
442    if( !tor->isRunning || !tr_torrentIsSeed( tor ) )
443        return;
444
445    /* if we're seeding and reach our seed ratio limit, stop the torrent */
446    if( tr_torrentIsSeedRatioDone( tor ) )
447    {
448        tr_torinf( tor, "Seed ratio reached; pausing torrent" );
449
450        tor->isStopping = true;
451
452        /* maybe notify the client */
453        if( tor->ratio_limit_hit_func != NULL )
454            tor->ratio_limit_hit_func( tor, tor->ratio_limit_hit_func_user_data );
455    }
456    /* if we're seeding and reach our inactiviy limit, stop the torrent */
457    else if( tr_torrentIsSeedIdleLimitDone( tor ) )
458    {
459        tr_torinf( tor, "Seeding idle limit reached; pausing torrent" );
460
461        tor->isStopping = true;
462        tor->finishedSeedingByIdle = true;
463
464        /* maybe notify the client */
465        if( tor->idle_limit_hit_func != NULL )
466            tor->idle_limit_hit_func( tor, tor->idle_limit_hit_func_user_data );
467    }
468}
469
470/***
471****
472***/
473
474void
475tr_torrentSetLocalError( tr_torrent * tor, const char * fmt, ... )
476{
477    va_list ap;
478
479    assert( tr_isTorrent( tor ) );
480
481    va_start( ap, fmt );
482    tor->error = TR_STAT_LOCAL_ERROR;
483    tor->errorTracker[0] = '\0';
484    evutil_vsnprintf( tor->errorString, sizeof( tor->errorString ), fmt, ap );
485    va_end( ap );
486
487    tr_torerr( tor, "%s", tor->errorString );
488
489    if( tor->isRunning )
490        tor->isStopping = true;
491}
492
493static void
494tr_torrentClearError( tr_torrent * tor )
495{
496    tor->error = TR_STAT_OK;
497    tor->errorString[0] = '\0';
498    tor->errorTracker[0] = '\0';
499}
500
501static void
502onTrackerResponse( tr_torrent * tor, const tr_tracker_event * event, void * unused UNUSED )
503{
504    switch( event->messageType )
505    {
506        case TR_TRACKER_PEERS:
507        {
508            size_t i;
509            const int8_t seedProbability = event->seedProbability;
510            const bool allAreSeeds = seedProbability == 100;
511
512             if( allAreSeeds )
513                tr_tordbg( tor, "Got %zu seeds from tracker", event->pexCount );
514            else
515                tr_tordbg( tor, "Got %zu peers from tracker", event->pexCount );
516
517            for( i = 0; i < event->pexCount; ++i )
518                tr_peerMgrAddPex( tor, TR_PEER_FROM_TRACKER, &event->pex[i], seedProbability );
519
520            if( allAreSeeds && tr_torrentIsPrivate( tor ) )
521                tr_peerMgrMarkAllAsSeeds( tor );
522
523            break;
524        }
525
526        case TR_TRACKER_WARNING:
527            tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
528            tor->error = TR_STAT_TRACKER_WARNING;
529            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
530            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
531            break;
532
533        case TR_TRACKER_ERROR:
534            tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
535            tor->error = TR_STAT_TRACKER_ERROR;
536            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
537            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
538            break;
539
540        case TR_TRACKER_ERROR_CLEAR:
541            if( tor->error != TR_STAT_LOCAL_ERROR )
542                tr_torrentClearError( tor );
543            break;
544    }
545}
546
547/***
548****
549****  TORRENT INSTANTIATION
550****
551***/
552
553static tr_piece_index_t
554getBytePiece( const tr_info * info, uint64_t byteOffset )
555{
556    assert( info );
557    assert( info->pieceSize != 0 );
558
559    return byteOffset / info->pieceSize;
560}
561
562static void
563initFilePieces( tr_info *       info,
564                tr_file_index_t fileIndex )
565{
566    tr_file * file;
567    uint64_t  firstByte, lastByte;
568
569    assert( info );
570    assert( fileIndex < info->fileCount );
571
572    file = &info->files[fileIndex];
573    firstByte = file->offset;
574    lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
575    file->firstPiece = getBytePiece( info, firstByte );
576    file->lastPiece = getBytePiece( info, lastByte );
577}
578
579static int
580pieceHasFile( tr_piece_index_t piece,
581              const tr_file *  file )
582{
583    return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
584}
585
586static tr_priority_t
587calculatePiecePriority( const tr_torrent * tor,
588                        tr_piece_index_t   piece,
589                        int                fileHint )
590{
591    tr_file_index_t i;
592    tr_priority_t priority = TR_PRI_LOW;
593
594    /* find the first file that has data in this piece */
595    if( fileHint >= 0 ) {
596        i = fileHint;
597        while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
598            --i;
599    } else {
600        for( i = 0; i < tor->info.fileCount; ++i )
601            if( pieceHasFile( piece, &tor->info.files[i] ) )
602                break;
603    }
604
605    /* the piece's priority is the max of the priorities
606     * of all the files in that piece */
607    for( ; i < tor->info.fileCount; ++i )
608    {
609        const tr_file * file = &tor->info.files[i];
610
611        if( !pieceHasFile( piece, file ) )
612            break;
613
614        priority = MAX( priority, file->priority );
615
616        /* when dealing with multimedia files, getting the first and
617           last pieces can sometimes allow you to preview it a bit
618           before it's fully downloaded... */
619        if( file->priority >= TR_PRI_NORMAL )
620            if( file->firstPiece == piece || file->lastPiece == piece )
621                priority = TR_PRI_HIGH;
622    }
623
624    return priority;
625}
626
627static void
628tr_torrentInitFilePieces( tr_torrent * tor )
629{
630    int * firstFiles;
631    tr_file_index_t f;
632    tr_piece_index_t p;
633    uint64_t offset = 0;
634    tr_info * inf = &tor->info;
635
636    /* assign the file offsets */
637    for( f=0; f<inf->fileCount; ++f ) {
638        inf->files[f].offset = offset;
639        offset += inf->files[f].length;
640        initFilePieces( inf, f );
641    }
642
643    /* build the array of first-file hints to give calculatePiecePriority */
644    firstFiles = tr_new( int, inf->pieceCount );
645    for( p=f=0; p<inf->pieceCount; ++p ) {
646        while( inf->files[f].lastPiece < p )
647            ++f;
648        firstFiles[p] = f;
649    }
650
651#if 0
652    /* test to confirm the first-file hints are correct */
653    for( p=0; p<inf->pieceCount; ++p ) {
654        f = firstFiles[p];
655        assert( inf->files[f].firstPiece <= p );
656        assert( inf->files[f].lastPiece >= p );
657        if( f > 0 )
658            assert( inf->files[f-1].lastPiece < p );
659        for( f=0; f<inf->fileCount; ++f )
660            if( pieceHasFile( p, &inf->files[f] ) )
661                break;
662        assert( (int)f == firstFiles[p] );
663    }
664#endif
665
666    for( p=0; p<inf->pieceCount; ++p )
667        inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
668
669    tr_free( firstFiles );
670}
671
672static void torrentStart( tr_torrent * tor );
673
674/**
675 * Decide on a block size. Constraints:
676 * (1) most clients decline requests over 16 KiB
677 * (2) pieceSize must be a multiple of block size
678 */
679uint32_t
680tr_getBlockSize( uint32_t pieceSize )
681{
682    uint32_t b = pieceSize;
683
684    while( b > MAX_BLOCK_SIZE )
685        b /= 2u;
686
687    if( !b || ( pieceSize % b ) ) /* not cleanly divisible */
688        return 0;
689    return b;
690}
691
692static void refreshCurrentDir( tr_torrent * tor );
693
694static void
695torrentInitFromInfo( tr_torrent * tor )
696{
697    uint64_t t;
698    tr_info * info = &tor->info;
699
700    tor->blockSize = tr_getBlockSize( info->pieceSize );
701
702    if( info->pieceSize )
703        tor->lastPieceSize = (uint32_t)(info->totalSize % info->pieceSize);
704
705    if( !tor->lastPieceSize )
706        tor->lastPieceSize = info->pieceSize;
707
708    if( tor->blockSize )
709        tor->lastBlockSize = info->totalSize % tor->blockSize;
710
711    if( !tor->lastBlockSize )
712        tor->lastBlockSize = tor->blockSize;
713
714    tor->blockCount = tor->blockSize
715        ? ( info->totalSize + tor->blockSize - 1 ) / tor->blockSize
716        : 0;
717
718    tor->blockCountInPiece = tor->blockSize
719        ? info->pieceSize / tor->blockSize
720        : 0;
721
722    tor->blockCountInLastPiece = tor->blockSize
723        ? ( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize
724        : 0;
725
726    /* check our work */
727    if( tor->blockSize != 0 )
728        assert( ( info->pieceSize % tor->blockSize ) == 0 );
729    t = info->pieceCount - 1;
730    t *= info->pieceSize;
731    t += tor->lastPieceSize;
732    assert( t == info->totalSize );
733    t = tor->blockCount - 1;
734    t *= tor->blockSize;
735    t += tor->lastBlockSize;
736    assert( t == info->totalSize );
737    t = info->pieceCount - 1;
738    t *= tor->blockCountInPiece;
739    t += tor->blockCountInLastPiece;
740    assert( t == (uint64_t)tor->blockCount );
741
742    tr_cpConstruct( &tor->completion, tor );
743
744    tr_torrentInitFilePieces( tor );
745
746    tor->completeness = tr_cpGetStatus( &tor->completion );
747}
748
749static void tr_torrentFireMetadataCompleted( tr_torrent * tor );
750
751void
752tr_torrentGotNewInfoDict( tr_torrent * tor )
753{
754    torrentInitFromInfo( tor );
755
756    tr_peerMgrOnTorrentGotMetainfo( tor );
757
758    tr_torrentFireMetadataCompleted( tor );
759}
760
761static bool
762hasAnyLocalData( const tr_torrent * tor )
763{
764    tr_file_index_t i;
765    bool has_local_data = false;
766    const tr_file_index_t n = tor->info.fileCount;
767
768    for( i=0; i<n && !has_local_data; ++i )
769    {
770        struct stat sb;
771        char * filename = tr_torrentFindFile( tor, i );
772
773        if( filename && !stat( filename, &sb ) )
774            has_local_data = true;
775
776        tr_free( filename );
777    }
778
779    return has_local_data;
780}
781
782static bool
783setLocalErrorIfFilesDisappeared( tr_torrent * tor )
784{
785    const bool disappeared = ( tr_cpHaveTotal( &tor->completion ) > 0 ) && !hasAnyLocalData( tor );
786
787    if( disappeared )
788    {
789        tr_deeplog_tor( tor, "%s", "[LAZY] uh oh, the files disappeared" );
790        tr_torrentSetLocalError( tor, "%s", _( "No data found! Ensure your drives are connected or use \"Set Location\". To re-download, remove the torrent and re-add it." ) );
791    }
792
793    return disappeared;
794}
795
796static void
797torrentInit( tr_torrent * tor, const tr_ctor * ctor )
798{
799    int doStart;
800    uint64_t loaded;
801    const char * dir;
802    bool isNewTorrent;
803    struct stat st;
804    static int nextUniqueId = 1;
805    tr_session * session = tr_ctorGetSession( ctor );
806
807    assert( session != NULL );
808
809    tr_sessionLock( session );
810
811    tor->session   = session;
812    tor->uniqueId = nextUniqueId++;
813    tor->magicNumber = TORRENT_MAGIC_NUMBER;
814
815    tr_peerIdInit( tor->peer_id );
816
817    tr_sha1( tor->obfuscatedHash, "req2", 4,
818             tor->info.hash, SHA_DIGEST_LENGTH,
819             NULL );
820
821    if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) ||
822        !tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
823            tor->downloadDir = tr_strdup( dir );
824
825    if( tr_ctorGetIncompleteDir( ctor, &dir ) )
826        dir = tr_sessionGetIncompleteDir( session );
827    if( tr_sessionIsIncompleteDirEnabled( session ) )
828        tor->incompleteDir = tr_strdup( dir );
829
830    tr_bandwidthConstruct( &tor->bandwidth, session, &session->bandwidth );
831
832    tor->bandwidth.priority = tr_ctorGetBandwidthPriority( ctor );
833
834    tor->error = TR_STAT_OK;
835
836    tor->finishedSeedingByIdle = false;
837
838    tr_peerMgrAddTorrent( session->peerMgr, tor );
839
840    assert( !tor->downloadedCur );
841    assert( !tor->uploadedCur );
842
843    tr_torrentSetAddedDate( tor, tr_time( ) ); /* this is a default value to be
844                                                  overwritten by the resume file */
845
846    torrentInitFromInfo( tor );
847    loaded = tr_torrentLoadResume( tor, ~0, ctor );
848    tor->completeness = tr_cpGetStatus( &tor->completion );
849    setLocalErrorIfFilesDisappeared( tor );
850
851    tr_ctorInitTorrentPriorities( ctor, tor );
852    tr_ctorInitTorrentWanted( ctor, tor );
853
854    refreshCurrentDir( tor );
855
856    doStart = tor->isRunning;
857    tor->isRunning = 0;
858
859    if( !( loaded & TR_FR_SPEEDLIMIT ) )
860    {
861        tr_torrentUseSpeedLimit( tor, TR_UP, false );
862        tr_torrentSetSpeedLimit_Bps( tor, TR_UP, tr_sessionGetSpeedLimit_Bps( tor->session, TR_UP ) );
863        tr_torrentUseSpeedLimit( tor, TR_DOWN, false );
864        tr_torrentSetSpeedLimit_Bps( tor, TR_DOWN, tr_sessionGetSpeedLimit_Bps( tor->session, TR_DOWN ) );
865        tr_torrentUseSessionLimits( tor, true );
866    }
867
868    if( !( loaded & TR_FR_RATIOLIMIT ) )
869    {
870        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
871        tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
872    }
873
874    if( !( loaded & TR_FR_IDLELIMIT ) )
875    {
876        tr_torrentSetIdleMode( tor, TR_IDLELIMIT_GLOBAL );
877        tr_torrentSetIdleLimit( tor, tr_sessionGetIdleLimit( tor->session ) );
878    }
879
880    {
881        tr_torrent * it = NULL;
882        tr_torrent * last = NULL;
883        while( ( it = tr_torrentNext( session, it ) ) )
884            last = it;
885
886        if( !last )
887            session->torrentList = tor;
888        else
889            last->next = tor;
890        ++session->torrentCount;
891    }
892
893    /* if we don't have a local .torrent file already, assume the torrent is new */
894    isNewTorrent = stat( tor->info.torrent, &st );
895
896    /* maybe save our own copy of the metainfo */
897    if( tr_ctorGetSave( ctor ) )
898    {
899        const tr_benc * val;
900        if( !tr_ctorGetMetainfo( ctor, &val ) )
901        {
902            const char * path = tor->info.torrent;
903            const int err = tr_bencToFile( val, TR_FMT_BENC, path );
904            if( err )
905                tr_torrentSetLocalError( tor, "Unable to save torrent file: %s", tr_strerror( err ) );
906            tr_sessionSetTorrentFile( tor->session, tor->info.hashString, path );
907        }
908    }
909
910    tor->tiers = tr_announcerAddTorrent( tor, onTrackerResponse, NULL );
911
912    if( isNewTorrent )
913    {
914        tor->startAfterVerify = doStart;
915        tr_torrentVerify( tor );
916    }
917    else if( doStart )
918    {
919        torrentStart( tor );
920    }
921
922    tr_sessionUnlock( session );
923}
924
925static tr_parse_result
926torrentParseImpl( const tr_ctor * ctor, tr_info * setmeInfo,
927                  bool * setmeHasInfo, int * dictLength )
928{
929    int             doFree;
930    bool            didParse;
931    bool            hasInfo = false;
932    tr_info         tmp;
933    const tr_benc * metainfo;
934    tr_session    * session = tr_ctorGetSession( ctor );
935    tr_parse_result result = TR_PARSE_OK;
936
937    if( setmeInfo == NULL )
938        setmeInfo = &tmp;
939    memset( setmeInfo, 0, sizeof( tr_info ) );
940
941    if( tr_ctorGetMetainfo( ctor, &metainfo ) )
942        return TR_PARSE_ERR;
943
944    didParse = tr_metainfoParse( session, metainfo, setmeInfo,
945                                 &hasInfo, dictLength );
946    doFree = didParse && ( setmeInfo == &tmp );
947
948    if( !didParse )
949        result = TR_PARSE_ERR;
950
951    if( didParse && hasInfo && !tr_getBlockSize( setmeInfo->pieceSize ) )
952        result = TR_PARSE_ERR;
953
954    if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
955        result = TR_PARSE_DUPLICATE;
956
957    if( doFree )
958        tr_metainfoFree( setmeInfo );
959
960    if( setmeHasInfo != NULL )
961        *setmeHasInfo = hasInfo;
962
963    return result;
964}
965
966tr_parse_result
967tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
968{
969    return torrentParseImpl( ctor, setmeInfo, NULL, NULL );
970}
971
972tr_torrent *
973tr_torrentNew( const tr_ctor * ctor, int * setmeError )
974{
975    int len;
976    bool hasInfo;
977    tr_info tmpInfo;
978    tr_parse_result r;
979    tr_torrent * tor = NULL;
980
981    assert( ctor != NULL );
982    assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
983
984    r = torrentParseImpl( ctor, &tmpInfo, &hasInfo, &len );
985    if( r == TR_PARSE_OK )
986    {
987        tor = tr_new0( tr_torrent, 1 );
988        tor->info = tmpInfo;
989        if( hasInfo )
990            tor->infoDictLength = len;
991        torrentInit( tor, ctor );
992    }
993    else
994    {
995        if( r == TR_PARSE_DUPLICATE )
996            tr_metainfoFree( &tmpInfo );
997
998        if( setmeError )
999            *setmeError = r;
1000    }
1001
1002    return tor;
1003}
1004
1005/**
1006***
1007**/
1008
1009void
1010tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
1011{
1012    assert( tr_isTorrent( tor  ) );
1013
1014    if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
1015    {
1016        tr_free( tor->downloadDir );
1017        tor->downloadDir = tr_strdup( path );
1018        tr_torrentSetDirty( tor );
1019    }
1020
1021    refreshCurrentDir( tor );
1022}
1023
1024const char*
1025tr_torrentGetDownloadDir( const tr_torrent * tor )
1026{
1027    assert( tr_isTorrent( tor  ) );
1028
1029    return tor->downloadDir;
1030}
1031
1032const char *
1033tr_torrentGetCurrentDir( const tr_torrent * tor )
1034{
1035    assert( tr_isTorrent( tor  ) );
1036
1037    return tor->currentDir;
1038}
1039
1040
1041void
1042tr_torrentChangeMyPort( tr_torrent * tor )
1043{
1044    assert( tr_isTorrent( tor  ) );
1045
1046    if( tor->isRunning )
1047        tr_announcerChangeMyPort( tor );
1048}
1049
1050static inline void
1051tr_torrentManualUpdateImpl( void * vtor )
1052{
1053    tr_torrent * tor = vtor;
1054
1055    assert( tr_isTorrent( tor  ) );
1056
1057    if( tor->isRunning )
1058        tr_announcerManualAnnounce( tor );
1059}
1060
1061void
1062tr_torrentManualUpdate( tr_torrent * tor )
1063{
1064    assert( tr_isTorrent( tor  ) );
1065
1066    tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
1067}
1068
1069bool
1070tr_torrentCanManualUpdate( const tr_torrent * tor )
1071{
1072    return ( tr_isTorrent( tor  ) )
1073        && ( tor->isRunning )
1074        && ( tr_announcerCanManualAnnounce( tor ) );
1075}
1076
1077const tr_info *
1078tr_torrentInfo( const tr_torrent * tor )
1079{
1080    return tr_isTorrent( tor ) ? &tor->info : NULL;
1081}
1082
1083const tr_stat *
1084tr_torrentStatCached( tr_torrent * tor )
1085{
1086    const time_t now = tr_time( );
1087
1088    return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
1089         ? &tor->stats
1090         : tr_torrentStat( tor );
1091}
1092
1093void
1094tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
1095{
1096    assert( tr_isTorrent( tor ) );
1097    assert( state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW );
1098
1099    tor->verifyState = state;
1100    tor->anyDate = tr_time( );
1101}
1102
1103tr_torrent_activity
1104tr_torrentGetActivity( tr_torrent * tor )
1105{
1106    assert( tr_isTorrent( tor ) );
1107
1108    tr_torrentRecheckCompleteness( tor );
1109
1110    if( tor->verifyState == TR_VERIFY_NOW )
1111        return TR_STATUS_CHECK;
1112    if( tor->verifyState == TR_VERIFY_WAIT )
1113        return TR_STATUS_CHECK_WAIT;
1114    if( !tor->isRunning )
1115        return TR_STATUS_STOPPED;
1116    if( tor->completeness == TR_LEECH )
1117        return TR_STATUS_DOWNLOAD;
1118
1119    return TR_STATUS_SEED;
1120}
1121
1122static double
1123getVerifyProgress( const tr_torrent * tor )
1124{
1125    tr_piece_index_t i, n;
1126    tr_piece_index_t checked = 0;
1127
1128    assert( tr_isTorrent( tor ) );
1129
1130    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
1131        if( tor->info.pieces[i].timeChecked )
1132            ++checked;
1133
1134    return checked / (double)tor->info.pieceCount;
1135}
1136
1137const tr_stat *
1138tr_torrentStat( tr_torrent * tor )
1139{
1140    tr_stat *               s;
1141    uint64_t                now;
1142    uint64_t                seedRatioBytesLeft;
1143    uint64_t                seedRatioBytesGoal;
1144    bool                    seedRatioApplies;
1145    uint16_t                seedIdleMinutes;
1146
1147    if( !tor )
1148        return NULL;
1149
1150    assert( tr_isTorrent( tor ) );
1151    tr_torrentLock( tor );
1152
1153    tor->lastStatTime = tr_time( );
1154
1155    s = &tor->stats;
1156    s->id = tor->uniqueId;
1157    s->activity = tr_torrentGetActivity( tor );
1158    s->error = tor->error;
1159    tr_strlcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
1160
1161    s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
1162
1163    tr_peerMgrTorrentStats( tor,
1164                            &s->peersConnected,
1165                            &s->webseedsSendingToUs,
1166                            &s->peersSendingToUs,
1167                            &s->peersGettingFromUs,
1168                            s->peersFrom );
1169
1170    now = tr_time_msec( );
1171    s->rawUploadSpeed_KBps     = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_UP ) );
1172    s->pieceUploadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_UP ) );
1173    s->rawDownloadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_DOWN ) );
1174    s->pieceDownloadSpeed_KBps = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_DOWN ) );
1175
1176    s->percentComplete = tr_cpPercentComplete ( &tor->completion );
1177    s->metadataPercentComplete = tr_torrentGetMetadataPercent( tor );
1178
1179    s->percentDone         = tr_cpPercentDone  ( &tor->completion );
1180    s->leftUntilDone       = tr_cpLeftUntilDone( &tor->completion );
1181    s->sizeWhenDone        = tr_cpSizeWhenDone ( &tor->completion );
1182    s->recheckProgress     = s->activity == TR_STATUS_CHECK ? getVerifyProgress( tor ) : 0;
1183    s->activityDate        = tor->activityDate;
1184    s->addedDate           = tor->addedDate;
1185    s->doneDate            = tor->doneDate;
1186    s->startDate           = tor->startDate;
1187    s->secondsSeeding      = tor->secondsSeeding;
1188    s->secondsDownloading  = tor->secondsDownloading;
1189
1190    if ((s->activity == TR_STATUS_DOWNLOAD || s->activity == TR_STATUS_SEED) && s->startDate != 0)
1191        s->idleSecs = difftime(tr_time(), MAX(s->startDate, s->activityDate));
1192    else
1193        s->idleSecs = -1;
1194
1195    s->corruptEver      = tor->corruptCur    + tor->corruptPrev;
1196    s->downloadedEver   = tor->downloadedCur + tor->downloadedPrev;
1197    s->uploadedEver     = tor->uploadedCur   + tor->uploadedPrev;
1198    s->haveValid        = tr_cpHaveValid( &tor->completion );
1199    s->haveUnchecked    = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
1200    s->desiredAvailable = tr_peerMgrGetDesiredAvailable( tor );
1201
1202    s->ratio = tr_getRatio( s->uploadedEver,
1203                            s->downloadedEver ? s->downloadedEver : s->haveValid );
1204
1205    seedRatioApplies = tr_torrentGetSeedRatioBytes( tor, &seedRatioBytesLeft,
1206                                                         &seedRatioBytesGoal );
1207
1208    switch( s->activity )
1209    {
1210        /* etaXLSpeed exists because if we use the piece speed directly,
1211         * brief fluctuations cause the ETA to jump all over the place.
1212         * so, etaXLSpeed is a smoothed-out version of the piece speed
1213         * to dampen the effect of fluctuations */
1214
1215        case TR_STATUS_DOWNLOAD:
1216            if( ( tor->etaDLSpeedCalculatedAt + 800 ) < now ) {
1217                tor->etaDLSpeed_KBps = ( ( tor->etaDLSpeedCalculatedAt + 4000 ) < now )
1218                    ? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
1219                    : ((tor->etaDLSpeed_KBps*4.0) + s->pieceDownloadSpeed_KBps)/5.0; /* smooth across 5 readings */
1220                tor->etaDLSpeedCalculatedAt = now;
1221            }
1222
1223            if( s->leftUntilDone > s->desiredAvailable )
1224                s->eta = TR_ETA_NOT_AVAIL;
1225            else if( tor->etaDLSpeed_KBps < 1 )
1226                s->eta = TR_ETA_UNKNOWN;
1227            else
1228                s->eta = s->leftUntilDone / toSpeedBytes(tor->etaDLSpeed_KBps);
1229
1230            s->etaIdle = TR_ETA_NOT_AVAIL;
1231            break;
1232
1233        case TR_STATUS_SEED: {
1234            if( !seedRatioApplies )
1235                s->eta = TR_ETA_NOT_AVAIL;
1236            else {
1237                if( ( tor->etaULSpeedCalculatedAt + 800 ) < now ) {
1238                    tor->etaULSpeed_KBps = ( ( tor->etaULSpeedCalculatedAt + 4000 ) < now )
1239                        ? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
1240                        : ((tor->etaULSpeed_KBps*4.0) + s->pieceUploadSpeed_KBps)/5.0; /* smooth across 5 readings */
1241                    tor->etaULSpeedCalculatedAt = now;
1242                }
1243                if( tor->etaULSpeed_KBps < 1 )
1244                    s->eta = TR_ETA_UNKNOWN;
1245                else
1246                    s->eta = seedRatioBytesLeft / toSpeedBytes(tor->etaULSpeed_KBps);
1247            }
1248
1249            if( tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle( tor, &seedIdleMinutes ) )
1250                s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
1251            else
1252                s->etaIdle = TR_ETA_NOT_AVAIL;
1253            break;
1254        }
1255
1256        default:
1257            s->eta = TR_ETA_NOT_AVAIL;
1258            s->etaIdle = TR_ETA_NOT_AVAIL;
1259            break;
1260    }
1261
1262    /* s->haveValid is here to make sure a torrent isn't marked 'finished'
1263     * when the user hits "uncheck all" prior to starting the torrent... */
1264    s->finished = tor->finishedSeedingByIdle || (seedRatioApplies && !seedRatioBytesLeft && s->haveValid);
1265
1266    if( !seedRatioApplies || s->finished )
1267        s->seedRatioPercentDone = 1;
1268    else if( !seedRatioBytesGoal ) /* impossible? safeguard for div by zero */
1269        s->seedRatioPercentDone = 0;
1270    else
1271        s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
1272
1273    tr_torrentUnlock( tor );
1274
1275    return s;
1276}
1277
1278/***
1279****
1280***/
1281
1282static uint64_t
1283fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1284{
1285    uint64_t total = 0;
1286    const tr_file * f = &tor->info.files[index];
1287
1288    if( f->length )
1289    {
1290        tr_block_index_t first;
1291        tr_block_index_t last;
1292        tr_torGetFileBlockRange( tor, index, &first, &last );
1293
1294        if( first == last )
1295        {
1296            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1297                total = f->length;
1298        }
1299        else
1300        {
1301            /* the first block */
1302            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1303                total += tor->blockSize - ( f->offset % tor->blockSize );
1304
1305            /* the middle blocks */
1306            if( first + 1 < last ) {
1307                uint64_t u = tr_bitfieldCountRange( &tor->completion.blockBitfield, first+1, last );
1308                u *= tor->blockSize;
1309                total += u;
1310            }
1311
1312            /* the last block */
1313            if( tr_cpBlockIsComplete( &tor->completion, last ) )
1314                total += ( f->offset + f->length ) - ( (uint64_t)tor->blockSize * last );
1315        }
1316    }
1317
1318    return total;
1319}
1320
1321tr_file_stat *
1322tr_torrentFiles( const tr_torrent * tor,
1323                 tr_file_index_t *  fileCount )
1324{
1325    tr_file_index_t       i;
1326    const tr_file_index_t n = tor->info.fileCount;
1327    tr_file_stat *        files = tr_new0( tr_file_stat, n );
1328    tr_file_stat *        walk = files;
1329    const bool            isSeed = tor->completeness == TR_SEED;
1330
1331    assert( tr_isTorrent( tor ) );
1332
1333    for( i=0; i<n; ++i, ++walk ) {
1334        const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1335        walk->bytesCompleted = b;
1336        walk->progress = tor->info.files[i].length > 0 ? ( (float)b / tor->info.files[i].length ) : 1.0f;
1337    }
1338
1339    if( fileCount )
1340        *fileCount = n;
1341
1342    return files;
1343}
1344
1345void
1346tr_torrentFilesFree( tr_file_stat *            files,
1347                     tr_file_index_t fileCount UNUSED )
1348{
1349    tr_free( files );
1350}
1351
1352/***
1353****
1354***/
1355
1356double*
1357tr_torrentWebSpeeds_KBps( const tr_torrent * tor )
1358{
1359    double * ret = NULL;
1360
1361    if( tr_isTorrent( tor ) )
1362    {
1363        tr_torrentLock( tor );
1364        ret = tr_peerMgrWebSpeeds_KBps( tor );
1365        tr_torrentUnlock( tor );
1366    }
1367
1368    return ret;
1369}
1370
1371tr_peer_stat *
1372tr_torrentPeers( const tr_torrent * tor, int * peerCount )
1373{
1374    tr_peer_stat * ret = NULL;
1375
1376    if( tr_isTorrent( tor ) )
1377    {
1378        tr_torrentLock( tor );
1379        ret = tr_peerMgrPeerStats( tor, peerCount );
1380        tr_torrentUnlock( tor );
1381    }
1382
1383    return ret;
1384}
1385
1386void
1387tr_torrentPeersFree( tr_peer_stat * peers, int peerCount UNUSED )
1388{
1389    tr_free( peers );
1390}
1391
1392tr_tracker_stat *
1393tr_torrentTrackers( const tr_torrent * torrent, int * setmeTrackerCount )
1394{
1395    tr_tracker_stat * ret = NULL;
1396
1397    if( tr_isTorrent( torrent ) )
1398    {
1399        tr_torrentLock( torrent );
1400        ret = tr_announcerStats( torrent, setmeTrackerCount );
1401        tr_torrentUnlock( torrent );
1402    }
1403
1404    return ret;
1405}
1406
1407void
1408tr_torrentTrackersFree( tr_tracker_stat * trackers, int trackerCount )
1409{
1410    tr_announcerStatsFree( trackers, trackerCount );
1411}
1412
1413void
1414tr_torrentAvailability( const tr_torrent * tor, int8_t * tab, int size )
1415{
1416    if( tr_isTorrent( tor ) && ( tab != NULL ) && ( size > 0 ) )
1417    {
1418        tr_torrentLock( tor );
1419        tr_peerMgrTorrentAvailability( tor, tab, size );
1420        tr_torrentUnlock( tor );
1421    }
1422}
1423
1424void
1425tr_torrentAmountFinished( const tr_torrent * tor,
1426                          float *            tab,
1427                          int                size )
1428{
1429    assert( tr_isTorrent( tor ) );
1430
1431    tr_torrentLock( tor );
1432    tr_cpGetAmountDone( &tor->completion, tab, size );
1433    tr_torrentUnlock( tor );
1434}
1435
1436static void
1437tr_torrentResetTransferStats( tr_torrent * tor )
1438{
1439    tr_torrentLock( tor );
1440
1441    tor->downloadedPrev += tor->downloadedCur;
1442    tor->downloadedCur   = 0;
1443    tor->uploadedPrev   += tor->uploadedCur;
1444    tor->uploadedCur     = 0;
1445    tor->corruptPrev    += tor->corruptCur;
1446    tor->corruptCur      = 0;
1447
1448    tr_torrentSetDirty( tor );
1449
1450    tr_torrentUnlock( tor );
1451}
1452
1453void
1454tr_torrentSetHasPiece( tr_torrent *     tor,
1455                       tr_piece_index_t pieceIndex,
1456                       bool             has )
1457{
1458    assert( tr_isTorrent( tor ) );
1459    assert( pieceIndex < tor->info.pieceCount );
1460
1461    if( has )
1462        tr_cpPieceAdd( &tor->completion, pieceIndex );
1463    else
1464        tr_cpPieceRem( &tor->completion, pieceIndex );
1465}
1466
1467/***
1468****
1469***/
1470
1471static void
1472freeTorrent( tr_torrent * tor )
1473{
1474    tr_torrent * t;
1475    tr_session *  session = tor->session;
1476    tr_info *    inf = &tor->info;
1477
1478    assert( !tor->isRunning );
1479
1480    tr_sessionLock( session );
1481
1482    tr_peerMgrRemoveTorrent( tor );
1483
1484    tr_cpDestruct( &tor->completion );
1485
1486    tr_announcerRemoveTorrent( session->announcer, tor );
1487
1488    tr_free( tor->downloadDir );
1489    tr_free( tor->incompleteDir );
1490
1491    if( tor == session->torrentList )
1492        session->torrentList = tor->next;
1493    else for( t = session->torrentList; t != NULL; t = t->next ) {
1494        if( t->next == tor ) {
1495            t->next = tor->next;
1496            break;
1497        }
1498    }
1499
1500    assert( session->torrentCount >= 1 );
1501    session->torrentCount--;
1502
1503    tr_bandwidthDestruct( &tor->bandwidth );
1504
1505    tr_metainfoFree( inf );
1506    tr_free( tor );
1507
1508    tr_sessionUnlock( session );
1509}
1510
1511/**
1512***  Start/Stop Callback
1513**/
1514
1515static void
1516torrentStartImpl( void * vtor )
1517{
1518    time_t now;
1519    tr_torrent * tor = vtor;
1520
1521    assert( tr_isTorrent( tor ) );
1522
1523    tr_sessionLock( tor->session );
1524
1525    tr_torrentRecheckCompleteness( tor );
1526
1527    now = tr_time( );
1528    tor->isRunning = true;
1529    tor->completeness = tr_cpGetStatus( &tor->completion );
1530    tor->startDate = tor->anyDate = now;
1531    tr_torrentClearError( tor );
1532    tor->finishedSeedingByIdle = false;
1533
1534    tr_torrentResetTransferStats( tor );
1535    tr_announcerTorrentStarted( tor );
1536    tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1537    tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt( 20 );
1538    tor->lpdAnnounceAt = now;
1539    tr_peerMgrStartTorrent( tor );
1540
1541    tr_sessionUnlock( tor->session );
1542}
1543
1544uint64_t
1545tr_torrentGetCurrentSizeOnDisk( const tr_torrent * tor )
1546{
1547    tr_file_index_t i;
1548    uint64_t byte_count = 0;
1549    const tr_file_index_t n = tor->info.fileCount;
1550
1551    for( i=0; i<n; ++i )
1552    {
1553        struct stat sb;
1554        char * filename = tr_torrentFindFile( tor, i );
1555
1556        sb.st_size = 0;
1557        if( filename && !stat( filename, &sb ) )
1558            byte_count += sb.st_size;
1559
1560        tr_free( filename );
1561    }
1562
1563    return byte_count;
1564}
1565
1566static void
1567torrentStart( tr_torrent * tor )
1568{
1569    /* already running... */
1570    if( tor->isRunning )
1571        return;
1572
1573    /* don't allow the torrent to be started if the files disappeared */
1574    if( setLocalErrorIfFilesDisappeared( tor ) )
1575        return;
1576
1577    /* verifying right now... wait until that's done so
1578     * we'll know what completeness to use/announce */
1579    if( tor->verifyState != TR_VERIFY_NONE ) {
1580        tor->startAfterVerify = true;
1581        return;
1582    }
1583
1584    /* otherwise, start it now... */
1585    tr_sessionLock( tor->session );
1586
1587    /* allow finished torrents to be resumed */
1588    if( tr_torrentIsSeedRatioDone( tor ) ) {
1589        tr_torinf( tor, _( "Restarted manually -- disabling its seed ratio" ) );
1590        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
1591    }
1592
1593    /* corresponds to the peer_id sent as a tracker request parameter.
1594     * one tracker admin says: "When the same torrent is opened and
1595     * closed and opened again without quitting Transmission ...
1596     * change the peerid. It would help sometimes if a stopped event
1597     * was missed to ensure that we didn't think someone was cheating. */
1598    tr_peerIdInit( tor->peer_id );
1599    tor->isRunning = 1;
1600    tr_torrentSetDirty( tor );
1601    tr_runInEventThread( tor->session, torrentStartImpl, tor );
1602
1603    tr_sessionUnlock( tor->session );
1604}
1605
1606void
1607tr_torrentStart( tr_torrent * tor )
1608{
1609    if( tr_isTorrent( tor ) )
1610        torrentStart( tor );
1611}
1612
1613static void
1614torrentRecheckDoneImpl( void * vtor )
1615{
1616    tr_torrent * tor = vtor;
1617    assert( tr_isTorrent( tor ) );
1618
1619    tr_torrentRecheckCompleteness( tor );
1620
1621    if( tor->startAfterVerify ) {
1622        tor->startAfterVerify = false;
1623        torrentStart( tor );
1624    }
1625}
1626
1627static void
1628torrentRecheckDoneCB( tr_torrent * tor )
1629{
1630    assert( tr_isTorrent( tor ) );
1631
1632    tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1633}
1634
1635static void
1636verifyTorrent( void * vtor )
1637{
1638    tr_torrent * tor = vtor;
1639
1640    tr_sessionLock( tor->session );
1641
1642    /* if the torrent's already being verified, stop it */
1643    tr_verifyRemove( tor );
1644
1645    /* if the torrent's running, stop it & set the restart-after-verify flag */
1646    if( tor->startAfterVerify || tor->isRunning ) {
1647        /* don't clobber isStopping */
1648        const bool startAfter = tor->isStopping ? false : true;
1649        tr_torrentStop( tor );
1650        tor->startAfterVerify = startAfter;
1651    }
1652
1653    if( setLocalErrorIfFilesDisappeared( tor ) )
1654        tor->startAfterVerify = false;
1655    else
1656        tr_verifyAdd( tor, torrentRecheckDoneCB );
1657
1658    tr_sessionUnlock( tor->session );
1659}
1660
1661void
1662tr_torrentVerify( tr_torrent * tor )
1663{
1664    if( tr_isTorrent( tor ) )
1665        tr_runInEventThread( tor->session, verifyTorrent, tor );
1666}
1667
1668void
1669tr_torrentSave( tr_torrent * tor )
1670{
1671    assert( tr_isTorrent( tor ) );
1672
1673    if( tor->isDirty )
1674    {
1675        tor->isDirty = false;
1676        tr_torrentSaveResume( tor );
1677    }
1678}
1679
1680static void
1681stopTorrent( void * vtor )
1682{
1683    tr_torrent * tor = vtor;
1684    tr_torinf( tor, "Pausing" );
1685
1686    assert( tr_isTorrent( tor ) );
1687
1688    tr_torrentLock( tor );
1689
1690    tr_verifyRemove( tor );
1691    tr_peerMgrStopTorrent( tor );
1692    tr_announcerTorrentStopped( tor );
1693    tr_cacheFlushTorrent( tor->session->cache, tor );
1694
1695    tr_fdTorrentClose( tor->session, tor->uniqueId );
1696
1697    if( !tor->isDeleting )
1698        tr_torrentSave( tor );
1699
1700    tr_torrentUnlock( tor );
1701}
1702
1703void
1704tr_torrentStop( tr_torrent * tor )
1705{
1706    assert( tr_isTorrent( tor ) );
1707
1708    if( tr_isTorrent( tor ) )
1709    {
1710        tr_sessionLock( tor->session );
1711
1712        tor->isRunning = 0;
1713        tor->isStopping = 0;
1714        tr_torrentSetDirty( tor );
1715        tr_runInEventThread( tor->session, stopTorrent, tor );
1716
1717        tr_sessionUnlock( tor->session );
1718    }
1719}
1720
1721static void
1722closeTorrent( void * vtor )
1723{
1724    tr_benc * d;
1725    tr_torrent * tor = vtor;
1726
1727    assert( tr_isTorrent( tor ) );
1728
1729    d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1730    tr_bencDictAddInt( d, "id", tor->uniqueId );
1731    tr_bencDictAddInt( d, "date", tr_time( ) );
1732
1733    tr_torinf( tor, "%s", _( "Removing torrent" ) );
1734
1735    stopTorrent( tor );
1736
1737    if( tor->isDeleting )
1738    {
1739        tr_metainfoRemoveSaved( tor->session, &tor->info );
1740        tr_torrentRemoveResume( tor );
1741    }
1742
1743    tor->isRunning = 0;
1744    freeTorrent( tor );
1745}
1746
1747void
1748tr_torrentFree( tr_torrent * tor )
1749{
1750    if( tr_isTorrent( tor ) )
1751    {
1752        tr_session * session = tor->session;
1753        assert( tr_isSession( session ) );
1754        tr_sessionLock( session );
1755
1756        tr_torrentClearCompletenessCallback( tor );
1757        tr_runInEventThread( session, closeTorrent, tor );
1758
1759        tr_sessionUnlock( session );
1760    }
1761}
1762
1763struct remove_data
1764{
1765    tr_torrent   * tor;
1766    bool           deleteFlag;
1767    tr_fileFunc  * deleteFunc;
1768};
1769
1770static void tr_torrentDeleteLocalData( tr_torrent *, tr_fileFunc );
1771
1772static void
1773removeTorrent( void * vdata )
1774{
1775    struct remove_data * data = vdata;
1776
1777    if( data->deleteFlag )
1778        tr_torrentDeleteLocalData( data->tor, data->deleteFunc );
1779
1780    tr_torrentClearCompletenessCallback( data->tor );
1781    closeTorrent( data->tor );
1782    tr_free( data );
1783}
1784
1785void
1786tr_torrentRemove( tr_torrent   * tor,
1787                  bool           deleteFlag,
1788                  tr_fileFunc    deleteFunc )
1789{
1790    struct remove_data * data;
1791
1792    assert( tr_isTorrent( tor ) );
1793    tor->isDeleting = 1;
1794
1795    data = tr_new0( struct remove_data, 1 );
1796    data->tor = tor;
1797    data->deleteFlag = deleteFlag;
1798    data->deleteFunc = deleteFunc;
1799    tr_runInEventThread( tor->session, removeTorrent, data );
1800}
1801
1802/**
1803***  Completeness
1804**/
1805
1806static const char *
1807getCompletionString( int type )
1808{
1809    switch( type )
1810    {
1811        /* Translators: this is a minor point that's safe to skip over, but FYI:
1812           "Complete" and "Done" are specific, different terms in Transmission:
1813           "Complete" means we've downloaded every file in the torrent.
1814           "Done" means we're done downloading the files we wanted, but NOT all
1815           that exist */
1816        case TR_PARTIAL_SEED:
1817            return _( "Done" );
1818
1819        case TR_SEED:
1820            return _( "Complete" );
1821
1822        default:
1823            return _( "Incomplete" );
1824    }
1825}
1826
1827static void
1828fireCompletenessChange( tr_torrent       * tor,
1829                        tr_completeness    status,
1830                        bool               wasRunning )
1831{
1832    assert( ( status == TR_LEECH )
1833         || ( status == TR_SEED )
1834         || ( status == TR_PARTIAL_SEED ) );
1835
1836    if( tor->completeness_func )
1837        tor->completeness_func( tor, status, wasRunning,
1838                                tor->completeness_func_user_data );
1839}
1840
1841void
1842tr_torrentSetCompletenessCallback( tr_torrent                    * tor,
1843                                   tr_torrent_completeness_func    func,
1844                                   void                          * user_data )
1845{
1846    assert( tr_isTorrent( tor ) );
1847
1848    tor->completeness_func = func;
1849    tor->completeness_func_user_data = user_data;
1850}
1851
1852void
1853tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1854{
1855    tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1856}
1857
1858void
1859tr_torrentSetRatioLimitHitCallback( tr_torrent                     * tor,
1860                                    tr_torrent_ratio_limit_hit_func  func,
1861                                    void                           * user_data )
1862{
1863    assert( tr_isTorrent( tor ) );
1864
1865    tor->ratio_limit_hit_func = func;
1866    tor->ratio_limit_hit_func_user_data = user_data;
1867}
1868
1869void
1870tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1871{
1872    tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1873}
1874
1875void
1876tr_torrentSetIdleLimitHitCallback( tr_torrent                    * tor,
1877                                   tr_torrent_idle_limit_hit_func  func,
1878                                   void                          * user_data )
1879{
1880    assert( tr_isTorrent( tor ) );
1881
1882    tor->idle_limit_hit_func = func;
1883    tor->idle_limit_hit_func_user_data = user_data;
1884}
1885
1886void
1887tr_torrentClearIdleLimitHitCallback( tr_torrent * torrent )
1888{
1889    tr_torrentSetIdleLimitHitCallback( torrent, NULL, NULL );
1890}
1891
1892static void
1893onSigCHLD( int i UNUSED )
1894{
1895    waitpid( -1, NULL, WNOHANG );
1896}
1897
1898static void
1899torrentCallScript( const tr_torrent * tor, const char * script )
1900{
1901    char timeStr[128];
1902    const time_t now = tr_time( );
1903
1904    tr_strlcpy( timeStr, ctime( &now ), sizeof( timeStr ) );
1905    *strchr( timeStr,'\n' ) = '\0';
1906
1907    if( script && *script )
1908    {
1909        int i;
1910        char * cmd[] = { tr_strdup( script ), NULL };
1911        char * env[] = {
1912            tr_strdup_printf( "TR_APP_VERSION=%s", SHORT_VERSION_STRING ),
1913            tr_strdup_printf( "TR_TIME_LOCALTIME=%s", timeStr ),
1914            tr_strdup_printf( "TR_TORRENT_DIR=%s", tor->currentDir ),
1915            tr_strdup_printf( "TR_TORRENT_ID=%d", tr_torrentId( tor ) ),
1916            tr_strdup_printf( "TR_TORRENT_HASH=%s", tor->info.hashString ),
1917            tr_strdup_printf( "TR_TORRENT_NAME=%s", tr_torrentName( tor ) ),
1918            NULL };
1919
1920        tr_torinf( tor, "Calling script \"%s\"", script );
1921
1922#ifdef WIN32
1923        _spawnvpe( _P_NOWAIT, script, (const char*)cmd, env );
1924#else
1925        signal( SIGCHLD, onSigCHLD );
1926
1927        if( !fork( ) )
1928        {
1929            for (i=0; env[i]; ++i)
1930                putenv(env[i]);
1931            execvp( script, cmd );
1932            _exit( 0 );
1933        }
1934#endif
1935
1936        for( i=0; cmd[i]; ++i ) tr_free( cmd[i] );
1937        for( i=0; env[i]; ++i ) tr_free( env[i] );
1938    }
1939}
1940
1941void
1942tr_torrentRecheckCompleteness( tr_torrent * tor )
1943{
1944    tr_completeness completeness;
1945
1946    assert( tr_isTorrent( tor ) );
1947
1948    tr_torrentLock( tor );
1949
1950    completeness = tr_cpGetStatus( &tor->completion );
1951
1952    if( completeness != tor->completeness )
1953    {
1954        const int recentChange = tor->downloadedCur != 0;
1955        const bool wasLeeching = !tr_torrentIsSeed( tor );
1956        const bool wasRunning = tor->isRunning;
1957
1958        if( recentChange )
1959        {
1960            tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
1961                      getCompletionString( tor->completeness ),
1962                      getCompletionString( completeness ) );
1963        }
1964
1965        tor->completeness = completeness;
1966        tr_fdTorrentClose( tor->session, tor->uniqueId );
1967
1968        if( tr_torrentIsSeed( tor ) )
1969        {
1970            if( recentChange )
1971            {
1972                tr_announcerTorrentCompleted( tor );
1973                tor->doneDate = tor->anyDate = tr_time( );
1974            }
1975
1976            if( wasLeeching && wasRunning )
1977            {
1978                /* clear interested flag on all peers */
1979                tr_peerMgrClearInterest( tor );
1980
1981                /* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
1982                tr_torrentCheckSeedLimit( tor );
1983            }
1984
1985            if( tor->currentDir == tor->incompleteDir )
1986                tr_torrentSetLocation( tor, tor->downloadDir, true, NULL, NULL );
1987
1988            if( tr_sessionIsTorrentDoneScriptEnabled( tor->session ) )
1989                torrentCallScript( tor, tr_sessionGetTorrentDoneScript( tor->session ) );
1990        }
1991
1992        fireCompletenessChange( tor, wasRunning, completeness );
1993
1994        tr_torrentSetDirty( tor );
1995    }
1996
1997    tr_torrentUnlock( tor );
1998}
1999
2000/***
2001****
2002***/
2003
2004static void
2005tr_torrentFireMetadataCompleted( tr_torrent * tor )
2006{
2007    assert( tr_isTorrent( tor ) );
2008
2009    if( tor->metadata_func )
2010        tor->metadata_func( tor, tor->metadata_func_user_data );
2011}
2012
2013void
2014tr_torrentSetMetadataCallback( tr_torrent                * tor,
2015                               tr_torrent_metadata_func    func,
2016                               void                      * user_data )
2017{
2018    assert( tr_isTorrent( tor ) );
2019
2020    tor->metadata_func = func;
2021    tor->metadata_func_user_data = user_data;
2022}
2023
2024
2025/**
2026***  File priorities
2027**/
2028
2029void
2030tr_torrentInitFilePriority( tr_torrent *    tor,
2031                            tr_file_index_t fileIndex,
2032                            tr_priority_t   priority )
2033{
2034    tr_piece_index_t i;
2035    tr_file *        file;
2036
2037    assert( tr_isTorrent( tor ) );
2038    assert( fileIndex < tor->info.fileCount );
2039    assert( tr_isPriority( priority ) );
2040
2041    file = &tor->info.files[fileIndex];
2042    file->priority = priority;
2043    for( i = file->firstPiece; i <= file->lastPiece; ++i )
2044        tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
2045}
2046
2047void
2048tr_torrentSetFilePriorities( tr_torrent             * tor,
2049                             const tr_file_index_t  * files,
2050                             tr_file_index_t          fileCount,
2051                             tr_priority_t            priority )
2052{
2053    tr_file_index_t i;
2054    assert( tr_isTorrent( tor ) );
2055    tr_torrentLock( tor );
2056
2057    for( i = 0; i < fileCount; ++i )
2058        if( files[i] < tor->info.fileCount )
2059            tr_torrentInitFilePriority( tor, files[i], priority );
2060    tr_torrentSetDirty( tor );
2061    tr_peerMgrRebuildRequests( tor );
2062
2063    tr_torrentUnlock( tor );
2064}
2065
2066tr_priority_t*
2067tr_torrentGetFilePriorities( const tr_torrent * tor )
2068{
2069    tr_file_index_t i;
2070    tr_priority_t * p;
2071
2072    assert( tr_isTorrent( tor ) );
2073
2074    tr_torrentLock( tor );
2075    p = tr_new0( tr_priority_t, tor->info.fileCount );
2076    for( i = 0; i < tor->info.fileCount; ++i )
2077        p[i] = tor->info.files[i].priority;
2078    tr_torrentUnlock( tor );
2079
2080    return p;
2081}
2082
2083/**
2084***  File DND
2085**/
2086
2087static void
2088setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
2089{
2090    const int8_t     dnd = !doDownload;
2091    tr_piece_index_t firstPiece;
2092    int8_t           firstPieceDND;
2093    tr_piece_index_t lastPiece;
2094    int8_t           lastPieceDND;
2095    tr_file_index_t  i;
2096    tr_file *        file = &tor->info.files[fileIndex];
2097
2098    file->dnd = dnd;
2099    firstPiece = file->firstPiece;
2100    lastPiece = file->lastPiece;
2101
2102    /* can't set the first piece to DND unless
2103       every file using that piece is DND */
2104    firstPieceDND = dnd;
2105    if( fileIndex > 0 )
2106    {
2107        for( i = fileIndex - 1; firstPieceDND; --i )
2108        {
2109            if( tor->info.files[i].lastPiece != firstPiece )
2110                break;
2111            firstPieceDND = tor->info.files[i].dnd;
2112            if( !i )
2113                break;
2114        }
2115    }
2116
2117    /* can't set the last piece to DND unless
2118       every file using that piece is DND */
2119    lastPieceDND = dnd;
2120    for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
2121    {
2122        if( tor->info.files[i].firstPiece != lastPiece )
2123            break;
2124        lastPieceDND = tor->info.files[i].dnd;
2125    }
2126
2127    if( firstPiece == lastPiece )
2128    {
2129        tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
2130    }
2131    else
2132    {
2133        tr_piece_index_t pp;
2134        tor->info.pieces[firstPiece].dnd = firstPieceDND;
2135        tor->info.pieces[lastPiece].dnd = lastPieceDND;
2136        for( pp = firstPiece + 1; pp < lastPiece; ++pp )
2137            tor->info.pieces[pp].dnd = dnd;
2138    }
2139}
2140
2141void
2142tr_torrentInitFileDLs( tr_torrent             * tor,
2143                       const tr_file_index_t  * files,
2144                       tr_file_index_t          fileCount,
2145                       bool                     doDownload )
2146{
2147    tr_file_index_t i;
2148
2149    assert( tr_isTorrent( tor ) );
2150
2151    tr_torrentLock( tor );
2152
2153    for( i=0; i<fileCount; ++i )
2154        if( files[i] < tor->info.fileCount )
2155            setFileDND( tor, files[i], doDownload );
2156
2157    tr_cpInvalidateDND( &tor->completion );
2158
2159    tr_torrentUnlock( tor );
2160}
2161
2162void
2163tr_torrentSetFileDLs( tr_torrent             * tor,
2164                      const tr_file_index_t  * files,
2165                      tr_file_index_t          fileCount,
2166                      bool                     doDownload )
2167{
2168    assert( tr_isTorrent( tor ) );
2169    tr_torrentLock( tor );
2170
2171    tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
2172    tr_torrentSetDirty( tor );
2173    tr_peerMgrRebuildRequests( tor );
2174
2175    tr_torrentUnlock( tor );
2176}
2177
2178/***
2179****
2180***/
2181
2182tr_priority_t
2183tr_torrentGetPriority( const tr_torrent * tor )
2184{
2185    assert( tr_isTorrent( tor ) );
2186
2187    return tor->bandwidth.priority;
2188}
2189
2190void
2191tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
2192{
2193    assert( tr_isTorrent( tor ) );
2194    assert( tr_isPriority( priority ) );
2195
2196    if( tor->bandwidth.priority != priority )
2197    {
2198        tor->bandwidth.priority = priority;
2199
2200        tr_torrentSetDirty( tor );
2201    }
2202}
2203
2204/***
2205****
2206***/
2207
2208void
2209tr_torrentSetPeerLimit( tr_torrent * tor,
2210                        uint16_t     maxConnectedPeers )
2211{
2212    assert( tr_isTorrent( tor ) );
2213
2214    if ( tor->maxConnectedPeers != maxConnectedPeers )
2215    {
2216        tor->maxConnectedPeers = maxConnectedPeers;
2217
2218        tr_torrentSetDirty( tor );
2219    }
2220}
2221
2222uint16_t
2223tr_torrentGetPeerLimit( const tr_torrent * tor )
2224{
2225    assert( tr_isTorrent( tor ) );
2226
2227    return tor->maxConnectedPeers;
2228}
2229
2230/***
2231****
2232***/
2233
2234void
2235tr_torrentGetBlockLocation( const tr_torrent * tor,
2236                            tr_block_index_t   block,
2237                            tr_piece_index_t * piece,
2238                            uint32_t         * offset,
2239                            uint32_t         * length )
2240{
2241    uint64_t pos = block;
2242    pos *= tor->blockSize;
2243    *piece = pos / tor->info.pieceSize;
2244    *offset = pos - ( *piece * tor->info.pieceSize );
2245    *length = tr_torBlockCountBytes( tor, block );
2246}
2247
2248
2249tr_block_index_t
2250_tr_block( const tr_torrent * tor,
2251           tr_piece_index_t   index,
2252           uint32_t           offset )
2253{
2254    tr_block_index_t ret;
2255
2256    assert( tr_isTorrent( tor ) );
2257
2258    ret = index;
2259    ret *= ( tor->info.pieceSize / tor->blockSize );
2260    ret += offset / tor->blockSize;
2261    return ret;
2262}
2263
2264bool
2265tr_torrentReqIsValid( const tr_torrent * tor,
2266                      tr_piece_index_t   index,
2267                      uint32_t           offset,
2268                      uint32_t           length )
2269{
2270    int err = 0;
2271
2272    assert( tr_isTorrent( tor ) );
2273
2274    if( index >= tor->info.pieceCount )
2275        err = 1;
2276    else if( length < 1 )
2277        err = 2;
2278    else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
2279        err = 3;
2280    else if( length > MAX_BLOCK_SIZE )
2281        err = 4;
2282    else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
2283        err = 5;
2284
2285    if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
2286                              (unsigned long)index,
2287                              (unsigned long)offset,
2288                              (unsigned long)length,
2289                              err );
2290
2291    return !err;
2292}
2293
2294uint64_t
2295tr_pieceOffset( const tr_torrent * tor,
2296                tr_piece_index_t   index,
2297                uint32_t           offset,
2298                uint32_t           length )
2299{
2300    uint64_t ret;
2301
2302    assert( tr_isTorrent( tor ) );
2303
2304    ret = tor->info.pieceSize;
2305    ret *= index;
2306    ret += offset;
2307    ret += length;
2308    return ret;
2309}
2310
2311void
2312tr_torGetFileBlockRange( const tr_torrent        * tor,
2313                         const tr_file_index_t     file,
2314                         tr_block_index_t        * first,
2315                         tr_block_index_t        * last )
2316{
2317    const tr_file * f = &tor->info.files[file];
2318    uint64_t offset = f->offset;
2319    *first = offset / tor->blockSize;
2320    if( !f->length )
2321        *last = *first;
2322    else {
2323        offset += f->length - 1;
2324        *last = offset / tor->blockSize;
2325    }
2326}
2327
2328void
2329tr_torGetPieceBlockRange( const tr_torrent        * tor,
2330                          const tr_piece_index_t    piece,
2331                          tr_block_index_t        * first,
2332                          tr_block_index_t        * last )
2333{
2334    uint64_t offset = tor->info.pieceSize;
2335    offset *= piece;
2336    *first = offset / tor->blockSize;
2337    offset += ( tr_torPieceCountBytes( tor, piece ) - 1 );
2338    *last = offset / tor->blockSize;
2339}
2340
2341
2342/***
2343****
2344***/
2345
2346void
2347tr_torrentSetPieceChecked( tr_torrent * tor, tr_piece_index_t pieceIndex )
2348{
2349    assert( tr_isTorrent( tor ) );
2350    assert( pieceIndex < tor->info.pieceCount );
2351
2352    tor->info.pieces[pieceIndex].timeChecked = tr_time( );
2353}
2354
2355void
2356tr_torrentSetChecked( tr_torrent * tor, time_t when )
2357{
2358    tr_piece_index_t i, n;
2359
2360    assert( tr_isTorrent( tor ) );
2361
2362    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
2363        tor->info.pieces[i].timeChecked = when;
2364}
2365
2366bool
2367tr_torrentCheckPiece( tr_torrent * tor, tr_piece_index_t pieceIndex )
2368{
2369    const bool pass = tr_ioTestPiece( tor, pieceIndex );
2370
2371    tr_deeplog_tor( tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass );
2372    tr_torrentSetHasPiece( tor, pieceIndex, pass );
2373    tr_torrentSetPieceChecked( tor, pieceIndex );
2374    tor->anyDate = tr_time( );
2375    tr_torrentSetDirty( tor );
2376
2377    return pass;
2378}
2379
2380time_t
2381tr_torrentGetFileMTime( const tr_torrent * tor, tr_file_index_t i )
2382{
2383    struct stat sb;
2384    time_t mtime = 0;
2385    char * path = tr_torrentFindFile( tor, i );
2386
2387    if( ( path != NULL ) && !stat( path, &sb ) && S_ISREG( sb.st_mode ) )
2388    {
2389#ifdef SYS_DARWIN
2390        mtime = sb.st_mtimespec.tv_sec;
2391#else
2392        mtime = sb.st_mtime;
2393#endif
2394    }
2395
2396    tr_free( path );
2397    return mtime;
2398}
2399
2400bool
2401tr_torrentPieceNeedsCheck( const tr_torrent * tor, tr_piece_index_t p )
2402{
2403    uint64_t unused;
2404    tr_file_index_t f;
2405    const tr_info * inf = tr_torrentInfo( tor );
2406
2407    /* if we've never checked this piece, then it needs to be checked */
2408    if( !inf->pieces[p].timeChecked )
2409        return true;
2410
2411    /* If we think we've completed one of the files in this piece,
2412     * but it's been modified since we last checked it,
2413     * then it needs to be rechecked */
2414    tr_ioFindFileLocation( tor, p, 0, &f, &unused );
2415    for( ; f < inf->fileCount && pieceHasFile( p, &inf->files[f] ); ++f )
2416        if( tr_cpFileIsComplete( &tor->completion, f ) )
2417            if( tr_torrentGetFileMTime( tor, f ) > inf->pieces[p].timeChecked )
2418                return true;
2419
2420    return false;
2421}
2422
2423/***
2424****
2425***/
2426
2427static int
2428compareTrackerByTier( const void * va, const void * vb )
2429{
2430    const tr_tracker_info * a = va;
2431    const tr_tracker_info * b = vb;
2432
2433    /* sort by tier */
2434    if( a->tier != b->tier )
2435        return a->tier - b->tier;
2436
2437    /* get the effects of a stable sort by comparing the two elements' addresses */
2438    return a - b;
2439}
2440
2441bool
2442tr_torrentSetAnnounceList( tr_torrent             * tor,
2443                           const tr_tracker_info  * trackers_in,
2444                           int                      trackerCount )
2445{
2446    int i;
2447    tr_benc metainfo;
2448    bool ok = true;
2449    tr_tracker_info * trackers;
2450
2451    tr_torrentLock( tor );
2452
2453    assert( tr_isTorrent( tor ) );
2454
2455    /* ensure the trackers' tiers are in ascending order */
2456    trackers = tr_memdup( trackers_in, sizeof( tr_tracker_info ) * trackerCount );
2457    qsort( trackers, trackerCount, sizeof( tr_tracker_info ), compareTrackerByTier );
2458
2459    /* look for bad URLs */
2460    for( i=0; ok && i<trackerCount; ++i )
2461        if( !tr_urlIsValidTracker( trackers[i].announce ) )
2462            ok = false;
2463
2464    /* save to the .torrent file */
2465    if( ok && !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2466    {
2467        bool hasInfo;
2468        tr_info tmpInfo;
2469
2470        /* remove the old fields */
2471        tr_bencDictRemove( &metainfo, "announce" );
2472        tr_bencDictRemove( &metainfo, "announce-list" );
2473
2474        /* add the new fields */
2475        if( trackerCount > 0 )
2476        {
2477            tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2478        }
2479        if( trackerCount > 1 )
2480        {
2481            int i;
2482            int prevTier = -1;
2483            tr_benc * tier = NULL;
2484            tr_benc * announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2485
2486            for( i=0; i<trackerCount; ++i ) {
2487                if( prevTier != trackers[i].tier ) {
2488                    prevTier = trackers[i].tier;
2489                    tier = tr_bencListAddList( announceList, 0 );
2490                }
2491                tr_bencListAddStr( tier, trackers[i].announce );
2492            }
2493        }
2494
2495        /* try to parse it back again, to make sure it's good */
2496        memset( &tmpInfo, 0, sizeof( tr_info ) );
2497        if( tr_metainfoParse( tor->session, &metainfo, &tmpInfo,
2498                              &hasInfo, &tor->infoDictLength ) )
2499        {
2500            /* it's good, so keep these new trackers and free the old ones */
2501
2502            tr_info swap;
2503            swap.trackers = tor->info.trackers;
2504            swap.trackerCount = tor->info.trackerCount;
2505            tor->info.trackers = tmpInfo.trackers;
2506            tor->info.trackerCount = tmpInfo.trackerCount;
2507            tmpInfo.trackers = swap.trackers;
2508            tmpInfo.trackerCount = swap.trackerCount;
2509
2510            tr_metainfoFree( &tmpInfo );
2511            tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2512        }
2513
2514        /* cleanup */
2515        tr_bencFree( &metainfo );
2516
2517        /* if we had a tracker-related error on this torrent,
2518         * and that tracker's been removed,
2519         * then clear the error */
2520        if(    ( tor->error == TR_STAT_TRACKER_WARNING )
2521            || ( tor->error == TR_STAT_TRACKER_ERROR ) )
2522        {
2523            bool clear = true;
2524
2525            for( i=0; clear && i<trackerCount; ++i )
2526                if( !strcmp( trackers[i].announce, tor->errorTracker ) )
2527                    clear = false;
2528
2529            if( clear )
2530                tr_torrentClearError( tor );
2531        }
2532
2533        /* tell the announcer to reload this torrent's tracker list */
2534        tr_announcerResetTorrent( tor->session->announcer, tor );
2535    }
2536
2537    tr_torrentUnlock( tor );
2538
2539    tr_free( trackers );
2540    return ok;
2541}
2542
2543/**
2544***
2545**/
2546
2547void
2548tr_torrentSetAddedDate( tr_torrent * tor,
2549                        time_t       t )
2550{
2551    assert( tr_isTorrent( tor ) );
2552
2553    tor->addedDate = t;
2554    tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2555}
2556
2557void
2558tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2559{
2560    assert( tr_isTorrent( tor ) );
2561
2562    tor->activityDate = t;
2563    tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2564}
2565
2566void
2567tr_torrentSetDoneDate( tr_torrent * tor,
2568                       time_t       t )
2569{
2570    assert( tr_isTorrent( tor ) );
2571
2572    tor->doneDate = t;
2573    tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2574}
2575
2576/**
2577***
2578**/
2579
2580uint64_t
2581tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2582{
2583    tr_file_index_t i;
2584    uint64_t bytesLeft = 0;
2585
2586    assert( tr_isTorrent( tor ) );
2587
2588    for( i=0; i<tor->info.fileCount; ++i )
2589    {
2590        if( !tor->info.files[i].dnd )
2591        {
2592            struct stat sb;
2593            const uint64_t length = tor->info.files[i].length;
2594            char * path = tr_torrentFindFile( tor, i );
2595
2596            bytesLeft += length;
2597
2598            if( ( path != NULL ) && !stat( path, &sb )
2599                                 && S_ISREG( sb.st_mode )
2600                                 && ( (uint64_t)sb.st_size <= length ) )
2601                bytesLeft -= sb.st_size;
2602
2603            tr_free( path );
2604        }
2605    }
2606
2607    return bytesLeft;
2608}
2609
2610/****
2611*****  Removing the torrent's local data
2612****/
2613
2614static int
2615vstrcmp( const void * a, const void * b )
2616{
2617    return strcmp( a, b );
2618}
2619
2620static int
2621compareLongestFirst( const void * a, const void * b )
2622{
2623    const size_t alen = strlen( a );
2624    const size_t blen = strlen( b );
2625
2626    if( alen != blen )
2627        return alen > blen ? -1 : 1;
2628
2629    return vstrcmp( a, b );
2630}
2631
2632static void
2633addDirtyFile( const char  * root,
2634              const char  * filename,
2635              tr_ptrArray * dirtyFolders )
2636{
2637    char * dir = tr_dirname( filename );
2638
2639    /* add the parent folders to dirtyFolders until we reach the root or a known-dirty */
2640    while (     ( dir != NULL )
2641             && ( strlen( root ) <= strlen( dir ) )
2642             && ( tr_ptrArrayFindSorted( dirtyFolders, dir, vstrcmp ) == NULL ) )
2643    {
2644        char * tmp;
2645        tr_ptrArrayInsertSorted( dirtyFolders, tr_strdup( dir ), vstrcmp );
2646
2647        tmp = tr_dirname( dir );
2648        tr_free( dir );
2649        dir = tmp;
2650    }
2651
2652    tr_free( dir );
2653}
2654
2655static void
2656walkLocalData( const tr_torrent * tor,
2657               const char       * root,
2658               const char       * dir,
2659               const char       * base,
2660               tr_ptrArray      * torrentFiles,
2661               tr_ptrArray      * folders,
2662               tr_ptrArray      * dirtyFolders )
2663{
2664    struct stat sb;
2665    char * buf = tr_buildPath( dir, base, NULL );
2666    int i = stat( buf, &sb );
2667
2668    if( !i )
2669    {
2670        DIR * odir = NULL;
2671
2672        if( S_ISDIR( sb.st_mode ) && ( ( odir = opendir ( buf ) ) ) )
2673        {
2674            struct dirent *d;
2675            tr_ptrArrayInsertSorted( folders, tr_strdup( buf ), vstrcmp );
2676            for( d = readdir( odir ); d != NULL; d = readdir( odir ) )
2677                if( d->d_name && strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) )
2678                    walkLocalData( tor, root, buf, d->d_name, torrentFiles, folders, dirtyFolders );
2679            closedir( odir );
2680        }
2681        else if( S_ISREG( sb.st_mode ) && ( sb.st_size > 0 ) )
2682        {
2683            const char * sub = buf + strlen( tor->currentDir ) + strlen( TR_PATH_DELIMITER_STR );
2684            const bool isTorrentFile = tr_ptrArrayFindSorted( torrentFiles, sub, vstrcmp ) != NULL;
2685            if( !isTorrentFile )
2686                addDirtyFile( root, buf, dirtyFolders );
2687        }
2688    }
2689
2690    tr_free( buf );
2691}
2692
2693static void
2694deleteLocalFile( const char * filename, tr_fileFunc fileFunc )
2695{
2696    struct stat sb;
2697    if( !stat( filename, &sb ) ) /* if file exists... */
2698        fileFunc( filename );
2699}
2700
2701static void
2702deleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2703{
2704    int i, n;
2705    char ** s;
2706    tr_file_index_t f;
2707    tr_ptrArray torrentFiles = TR_PTR_ARRAY_INIT;
2708    tr_ptrArray folders      = TR_PTR_ARRAY_INIT;
2709    tr_ptrArray dirtyFolders = TR_PTR_ARRAY_INIT; /* dirty == contains non-torrent files */
2710
2711    const char * firstFile = tor->info.files[0].name;
2712    const char * cpch = strchr( firstFile, TR_PATH_DELIMITER );
2713    char * tmp = cpch ? tr_strndup( firstFile, cpch - firstFile ) : NULL;
2714    char * root = tr_buildPath( tor->currentDir, tmp, NULL );
2715
2716    for( f=0; f<tor->info.fileCount; ++f ) {
2717        tr_ptrArrayInsertSorted( &torrentFiles, tr_strdup( tor->info.files[f].name ), vstrcmp );
2718        tr_ptrArrayInsertSorted( &torrentFiles, tr_torrentBuildPartial( tor, f ), vstrcmp );
2719    }
2720
2721    /* build the set of folders and dirtyFolders */
2722    walkLocalData( tor, root, root, NULL, &torrentFiles, &folders, &dirtyFolders );
2723
2724    /* try to remove entire folders first, so that the recycle bin will be tidy */
2725    s = (char**) tr_ptrArrayPeek( &folders, &n );
2726    for( i=0; i<n; ++i )
2727        if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2728            deleteLocalFile( s[i], fileFunc );
2729
2730    /* now blow away any remaining torrent files, such as torrent files in dirty folders */
2731    for( i=0, n=tr_ptrArraySize( &torrentFiles ); i<n; ++i ) {
2732        char * path = tr_buildPath( tor->currentDir, tr_ptrArrayNth( &torrentFiles, i ), NULL );
2733        deleteLocalFile( path, fileFunc );
2734        tr_free( path );
2735    }
2736
2737    /* Now clean out the directories left empty from the previous step.
2738     * Work from deepest to shallowest s.t. lower folders
2739     * won't prevent the upper folders from being deleted */
2740    {
2741        tr_ptrArray cleanFolders = TR_PTR_ARRAY_INIT;
2742        s = (char**) tr_ptrArrayPeek( &folders, &n );
2743        for( i=0; i<n; ++i )
2744            if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2745                tr_ptrArrayInsertSorted( &cleanFolders, s[i], compareLongestFirst );
2746        s = (char**) tr_ptrArrayPeek( &cleanFolders, &n );
2747        for( i=0; i<n; ++i ) {
2748#ifdef SYS_DARWIN
2749            char * dsStore = tr_buildPath( s[i], ".DS_Store", NULL );
2750            deleteLocalFile( dsStore, fileFunc );
2751            tr_free( dsStore );
2752#endif
2753            deleteLocalFile( s[i], fileFunc );
2754        }
2755        tr_ptrArrayDestruct( &cleanFolders, NULL );
2756    }
2757
2758    /* cleanup */
2759    tr_ptrArrayDestruct( &dirtyFolders, tr_free );
2760    tr_ptrArrayDestruct( &folders, tr_free );
2761    tr_ptrArrayDestruct( &torrentFiles, tr_free );
2762    tr_free( root );
2763    tr_free( tmp );
2764}
2765
2766static void
2767tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2768{
2769    assert( tr_isTorrent( tor ) );
2770
2771    if( fileFunc == NULL )
2772        fileFunc = remove;
2773
2774    /* close all the files because we're about to delete them */
2775    tr_cacheFlushTorrent( tor->session->cache, tor );
2776    tr_fdTorrentClose( tor->session, tor->uniqueId );
2777
2778    if( tor->info.fileCount > 1 )
2779    {
2780        deleteLocalData( tor, fileFunc );
2781    }
2782    else if( tor->info.fileCount == 1 )
2783    {
2784        char * tmp;
2785
2786        /* torrent only has one file */
2787        char * path = tr_buildPath( tor->currentDir, tor->info.files[0].name, NULL );
2788        deleteLocalFile( path, fileFunc );
2789        tr_free( path );
2790
2791        tmp = tr_torrentBuildPartial( tor, 0 );
2792        path = tr_buildPath( tor->currentDir, tmp, NULL );
2793        deleteLocalFile( path, fileFunc );
2794        tr_free( path );
2795        tr_free( tmp );
2796    }
2797}
2798
2799/***
2800****
2801***/
2802
2803struct LocationData
2804{
2805    bool move_from_old_location;
2806    volatile int * setme_state;
2807    volatile double * setme_progress;
2808    char * location;
2809    tr_torrent * tor;
2810};
2811
2812static void
2813setLocation( void * vdata )
2814{
2815    bool err = false;
2816    struct LocationData * data = vdata;
2817    tr_torrent * tor = data->tor;
2818    const bool do_move = data->move_from_old_location;
2819    const char * location = data->location;
2820    double bytesHandled = 0;
2821
2822    assert( tr_isTorrent( tor ) );
2823
2824    tr_dbg( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
2825            tr_torrentName(tor), tor->currentDir, location );
2826
2827    tr_mkdirp( location, 0777 );
2828
2829    if( !tr_is_same_file( location, tor->currentDir ) )
2830    {
2831        tr_file_index_t i;
2832
2833        /* bad idea to move files while they're being verified... */
2834        tr_verifyRemove( tor );
2835
2836        /* try to move the files.
2837         * FIXME: there are still all kinds of nasty cases, like what
2838         * if the target directory runs out of space halfway through... */
2839        for( i=0; !err && i<tor->info.fileCount; ++i )
2840        {
2841            const tr_file * f = &tor->info.files[i];
2842            const char * oldbase;
2843            char * sub;
2844            if( tr_torrentFindFile2( tor, i, &oldbase, &sub ) )
2845            {
2846                char * oldpath = tr_buildPath( oldbase, sub, NULL );
2847                char * newpath = tr_buildPath( location, sub, NULL );
2848
2849                tr_dbg( "Found file #%d: %s", (int)i, oldpath );
2850
2851                if( do_move && !tr_is_same_file( oldpath, newpath ) )
2852                {
2853                    bool renamed = false;
2854                    errno = 0;
2855                    tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2856                    if( tr_moveFile( oldpath, newpath, &renamed ) )
2857                    {
2858                        err = true;
2859                        tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2860                                        oldpath, newpath, tr_strerror( errno ) );
2861                    }
2862                }
2863
2864                tr_free( newpath );
2865                tr_free( oldpath );
2866                tr_free( sub );
2867            }
2868
2869            if( data->setme_progress )
2870            {
2871                bytesHandled += f->length;
2872                *data->setme_progress = bytesHandled / tor->info.totalSize;
2873            }
2874        }
2875
2876        if( !err )
2877        {
2878            /* blow away the leftover subdirectories in the old location */
2879            if( do_move )
2880                tr_torrentDeleteLocalData( tor, remove );
2881
2882            /* set the new location and reverify */
2883            tr_torrentSetDownloadDir( tor, location );
2884        }
2885    }
2886
2887    if( !err && do_move )
2888    {
2889        tr_free( tor->incompleteDir );
2890        tor->incompleteDir = NULL;
2891        tor->currentDir = tor->downloadDir;
2892    }
2893
2894    if( data->setme_state )
2895        *data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2896
2897    /* cleanup */
2898    tr_free( data->location );
2899    tr_free( data );
2900}
2901
2902void
2903tr_torrentSetLocation( tr_torrent       * tor,
2904                       const char       * location,
2905                       bool               move_from_old_location,
2906                       volatile double  * setme_progress,
2907                       volatile int     * setme_state )
2908{
2909    struct LocationData * data;
2910
2911    assert( tr_isTorrent( tor ) );
2912
2913    if( setme_state )
2914        *setme_state = TR_LOC_MOVING;
2915    if( setme_progress )
2916        *setme_progress = 0;
2917
2918    /* run this in the libtransmission thread */
2919    data = tr_new( struct LocationData, 1 );
2920    data->tor = tor;
2921    data->location = tr_strdup( location );
2922    data->move_from_old_location = move_from_old_location;
2923    data->setme_state = setme_state;
2924    data->setme_progress = setme_progress;
2925    tr_runInEventThread( tor->session, setLocation, data );
2926}
2927
2928/***
2929****
2930***/
2931
2932void
2933tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
2934{
2935    char * sub;
2936    const char * base;
2937    const tr_info * inf = &tor->info;
2938    const tr_file * f = &inf->files[fileNum];
2939    tr_piece * p;
2940    const tr_piece * pend;
2941    const time_t now = tr_time( );
2942
2943    /* close the file so that we can reopen in read-only mode as needed */
2944    tr_fdFileClose( tor->session, tor, fileNum );
2945
2946    /* now that the file is complete and closed, we can start watching its
2947     * mtime timestamp for changes to know if we need to reverify pieces */
2948    for( p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p )
2949        p->timeChecked = now;
2950
2951    /* if the torrent's current filename isn't the same as the one in the
2952     * metadata -- for example, if it had the ".part" suffix appended to
2953     * it until now -- then rename it to match the one in the metadata */
2954    if( tr_torrentFindFile2( tor, fileNum, &base, &sub ) )
2955    {
2956        if( strcmp( sub, f->name ) )
2957        {
2958            char * oldpath = tr_buildPath( base, sub, NULL );
2959            char * newpath = tr_buildPath( base, f->name, NULL );
2960
2961            if( rename( oldpath, newpath ) )
2962                tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
2963
2964            tr_free( newpath );
2965            tr_free( oldpath );
2966        }
2967
2968        tr_free( sub );
2969    }
2970}
2971
2972/***
2973****
2974***/
2975
2976static bool
2977fileExists( const char * filename )
2978{
2979    struct stat sb;
2980    const bool ok = !stat( filename, &sb );
2981    return ok;
2982}
2983
2984bool
2985tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
2986                     const char ** base, char ** subpath )
2987{
2988    char * part;
2989    const tr_file * file;
2990    const char * b = NULL;
2991    const char * s = NULL;
2992
2993    assert( tr_isTorrent( tor ) );
2994    assert( fileNum < tor->info.fileCount );
2995
2996    file = &tor->info.files[fileNum];
2997    part = tr_torrentBuildPartial( tor, fileNum );
2998
2999    if( b == NULL ) {
3000        char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
3001        if( fileExists( filename ) ) {
3002            b = tor->downloadDir;
3003            s = file->name;
3004        }
3005        tr_free( filename );
3006    }
3007
3008    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3009        char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
3010        if( fileExists( filename ) ) {
3011            b = tor->incompleteDir;
3012            s = file->name;
3013        }
3014        tr_free( filename );
3015    }
3016
3017    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3018        char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
3019        if( fileExists( filename ) ) {
3020            b = tor->incompleteDir;
3021            s = part;
3022        }
3023        tr_free( filename );
3024    }
3025
3026    if( b == NULL) {
3027        char * filename = tr_buildPath( tor->downloadDir, part, NULL );
3028        if( fileExists( filename ) ) {
3029            b = tor->downloadDir;
3030            s = part;
3031        }
3032        tr_free( filename );
3033    }
3034
3035    if( base != NULL )
3036        *base = b;
3037    if( subpath != NULL )
3038        *subpath = tr_strdup( s );
3039
3040    tr_free( part );
3041    return b != NULL;
3042}
3043
3044char*
3045tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
3046{
3047    char * subpath;
3048    char * ret = NULL;
3049    const char * base;
3050
3051    if( tr_torrentFindFile2( tor, fileNum, &base, &subpath ) )
3052    {
3053        ret = tr_buildPath( base, subpath, NULL );
3054        tr_free( subpath );
3055    }
3056
3057    return ret;
3058}
3059
3060/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
3061static void
3062refreshCurrentDir( tr_torrent * tor )
3063{
3064    const char * dir = NULL;
3065
3066    if( tor->incompleteDir == NULL )
3067        dir = tor->downloadDir;
3068    else if( !tr_torrentHasMetadata( tor ) ) /* no files to find */
3069        dir = tor->incompleteDir;
3070    else if( !tr_torrentFindFile2( tor, 0, &dir, NULL ) )
3071        dir = tor->incompleteDir;
3072
3073    assert( dir != NULL );
3074    assert( ( dir == tor->downloadDir ) || ( dir == tor->incompleteDir ) );
3075    tor->currentDir = dir;
3076}
3077
3078char*
3079tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
3080{
3081    return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
3082}
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