source: trunk/libtransmission/torrent.c @ 12609

Last change on this file since 12609 was 12609, checked in by jordan, 10 years ago

#671 "torrent queuing" -- add a tr_stat.isStalled flag.

  • Property svn:keywords set to Date Rev Author Id
File size: 88.6 KB
Line 
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 12609 2011-08-01 23:27:11Z 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, bool bypass_queue );
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
766    for( i=0; i<tor->info.fileCount; ++i )
767        if( tr_torrentFindFile2( tor, i, NULL, NULL, NULL ) )
768            return true;
769
770    return false;
771}
772
773static bool
774setLocalErrorIfFilesDisappeared( tr_torrent * tor )
775{
776    const bool disappeared = ( tr_cpHaveTotal( &tor->completion ) > 0 ) && !hasAnyLocalData( tor );
777
778    if( disappeared )
779    {
780        tr_deeplog_tor( tor, "%s", "[LAZY] uh oh, the files disappeared" );
781        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." ) );
782    }
783
784    return disappeared;
785}
786
787static void
788torrentInit( tr_torrent * tor, const tr_ctor * ctor )
789{
790    int doStart;
791    uint64_t loaded;
792    const char * dir;
793    bool isNewTorrent;
794    struct stat st;
795    static int nextUniqueId = 1;
796    tr_session * session = tr_ctorGetSession( ctor );
797
798    assert( session != NULL );
799
800    tr_sessionLock( session );
801
802    tor->session   = session;
803    tor->uniqueId = nextUniqueId++;
804    tor->magicNumber = TORRENT_MAGIC_NUMBER;
805    tor->queuePosition = -1;
806
807    tr_peerIdInit( tor->peer_id );
808
809    tr_sha1( tor->obfuscatedHash, "req2", 4,
810             tor->info.hash, SHA_DIGEST_LENGTH,
811             NULL );
812
813    if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) ||
814        !tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
815            tor->downloadDir = tr_strdup( dir );
816
817    if( tr_ctorGetIncompleteDir( ctor, &dir ) )
818        dir = tr_sessionGetIncompleteDir( session );
819    if( tr_sessionIsIncompleteDirEnabled( session ) )
820        tor->incompleteDir = tr_strdup( dir );
821
822    tr_bandwidthConstruct( &tor->bandwidth, session, &session->bandwidth );
823
824    tor->bandwidth.priority = tr_ctorGetBandwidthPriority( ctor );
825
826    tor->error = TR_STAT_OK;
827
828    tor->finishedSeedingByIdle = false;
829
830    tr_peerMgrAddTorrent( session->peerMgr, tor );
831
832    assert( !tor->downloadedCur );
833    assert( !tor->uploadedCur );
834
835    tr_torrentSetAddedDate( tor, tr_time( ) ); /* this is a default value to be
836                                                  overwritten by the resume file */
837
838    torrentInitFromInfo( tor );
839    loaded = tr_torrentLoadResume( tor, ~0, ctor );
840    tor->completeness = tr_cpGetStatus( &tor->completion );
841    setLocalErrorIfFilesDisappeared( tor );
842
843    tr_ctorInitTorrentPriorities( ctor, tor );
844    tr_ctorInitTorrentWanted( ctor, tor );
845
846    refreshCurrentDir( tor );
847
848    doStart = tor->isRunning;
849    tor->isRunning = 0;
850
851    if( !( loaded & TR_FR_SPEEDLIMIT ) )
852    {
853        tr_torrentUseSpeedLimit( tor, TR_UP, false );
854        tr_torrentSetSpeedLimit_Bps( tor, TR_UP, tr_sessionGetSpeedLimit_Bps( tor->session, TR_UP ) );
855        tr_torrentUseSpeedLimit( tor, TR_DOWN, false );
856        tr_torrentSetSpeedLimit_Bps( tor, TR_DOWN, tr_sessionGetSpeedLimit_Bps( tor->session, TR_DOWN ) );
857        tr_torrentUseSessionLimits( tor, true );
858    }
859
860    if( !( loaded & TR_FR_RATIOLIMIT ) )
861    {
862        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
863        tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
864    }
865
866    if( !( loaded & TR_FR_IDLELIMIT ) )
867    {
868        tr_torrentSetIdleMode( tor, TR_IDLELIMIT_GLOBAL );
869        tr_torrentSetIdleLimit( tor, tr_sessionGetIdleLimit( tor->session ) );
870    }
871
872    /* add the torrent to tr_session.torrentList */
873    ++session->torrentCount;
874    if( session->torrentList == NULL )
875        session->torrentList = tor;
876    else {
877        tr_torrent * it = session->torrentList;
878        while( it->next != NULL )
879            it = it->next;
880        it->next = tor;
881    }
882
883    /* if we don't have a local .torrent file already, assume the torrent is new */
884    isNewTorrent = stat( tor->info.torrent, &st );
885
886    /* maybe save our own copy of the metainfo */
887    if( tr_ctorGetSave( ctor ) )
888    {
889        const tr_benc * val;
890        if( !tr_ctorGetMetainfo( ctor, &val ) )
891        {
892            const char * path = tor->info.torrent;
893            const int err = tr_bencToFile( val, TR_FMT_BENC, path );
894            if( err )
895                tr_torrentSetLocalError( tor, "Unable to save torrent file: %s", tr_strerror( err ) );
896            tr_sessionSetTorrentFile( tor->session, tor->info.hashString, path );
897        }
898    }
899
900    tor->tiers = tr_announcerAddTorrent( tor, onTrackerResponse, NULL );
901
902    if( isNewTorrent )
903    {
904        tor->startAfterVerify = doStart;
905        tr_torrentVerify( tor );
906    }
907    else if( doStart )
908    {
909        tr_torrentStart( tor );
910    }
911
912    tr_sessionUnlock( session );
913}
914
915static tr_parse_result
916torrentParseImpl( const tr_ctor * ctor, tr_info * setmeInfo,
917                  bool * setmeHasInfo, int * dictLength )
918{
919    int             doFree;
920    bool            didParse;
921    bool            hasInfo = false;
922    tr_info         tmp;
923    const tr_benc * metainfo;
924    tr_session    * session = tr_ctorGetSession( ctor );
925    tr_parse_result result = TR_PARSE_OK;
926
927    if( setmeInfo == NULL )
928        setmeInfo = &tmp;
929    memset( setmeInfo, 0, sizeof( tr_info ) );
930
931    if( tr_ctorGetMetainfo( ctor, &metainfo ) )
932        return TR_PARSE_ERR;
933
934    didParse = tr_metainfoParse( session, metainfo, setmeInfo,
935                                 &hasInfo, dictLength );
936    doFree = didParse && ( setmeInfo == &tmp );
937
938    if( !didParse )
939        result = TR_PARSE_ERR;
940
941    if( didParse && hasInfo && !tr_getBlockSize( setmeInfo->pieceSize ) )
942        result = TR_PARSE_ERR;
943
944    if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
945        result = TR_PARSE_DUPLICATE;
946
947    if( doFree )
948        tr_metainfoFree( setmeInfo );
949
950    if( setmeHasInfo != NULL )
951        *setmeHasInfo = hasInfo;
952
953    return result;
954}
955
956tr_parse_result
957tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
958{
959    return torrentParseImpl( ctor, setmeInfo, NULL, NULL );
960}
961
962tr_torrent *
963tr_torrentNew( const tr_ctor * ctor, int * setmeError )
964{
965    int len;
966    bool hasInfo;
967    tr_info tmpInfo;
968    tr_parse_result r;
969    tr_torrent * tor = NULL;
970
971    assert( ctor != NULL );
972    assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
973
974    r = torrentParseImpl( ctor, &tmpInfo, &hasInfo, &len );
975    if( r == TR_PARSE_OK )
976    {
977        tor = tr_new0( tr_torrent, 1 );
978        tor->info = tmpInfo;
979        if( hasInfo )
980            tor->infoDictLength = len;
981        torrentInit( tor, ctor );
982    }
983    else
984    {
985        if( r == TR_PARSE_DUPLICATE )
986            tr_metainfoFree( &tmpInfo );
987
988        if( setmeError )
989            *setmeError = r;
990    }
991
992    return tor;
993}
994
995/**
996***
997**/
998
999void
1000tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
1001{
1002    assert( tr_isTorrent( tor  ) );
1003
1004    if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
1005    {
1006        tr_free( tor->downloadDir );
1007        tor->downloadDir = tr_strdup( path );
1008        tr_torrentSetDirty( tor );
1009    }
1010
1011    refreshCurrentDir( tor );
1012}
1013
1014const char*
1015tr_torrentGetDownloadDir( const tr_torrent * tor )
1016{
1017    assert( tr_isTorrent( tor  ) );
1018
1019    return tor->downloadDir;
1020}
1021
1022const char *
1023tr_torrentGetCurrentDir( const tr_torrent * tor )
1024{
1025    assert( tr_isTorrent( tor  ) );
1026
1027    return tor->currentDir;
1028}
1029
1030
1031void
1032tr_torrentChangeMyPort( tr_torrent * tor )
1033{
1034    assert( tr_isTorrent( tor  ) );
1035
1036    if( tor->isRunning )
1037        tr_announcerChangeMyPort( tor );
1038}
1039
1040static inline void
1041tr_torrentManualUpdateImpl( void * vtor )
1042{
1043    tr_torrent * tor = vtor;
1044
1045    assert( tr_isTorrent( tor  ) );
1046
1047    if( tor->isRunning )
1048        tr_announcerManualAnnounce( tor );
1049}
1050
1051void
1052tr_torrentManualUpdate( tr_torrent * tor )
1053{
1054    assert( tr_isTorrent( tor  ) );
1055
1056    tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
1057}
1058
1059bool
1060tr_torrentCanManualUpdate( const tr_torrent * tor )
1061{
1062    return ( tr_isTorrent( tor  ) )
1063        && ( tor->isRunning )
1064        && ( tr_announcerCanManualAnnounce( tor ) );
1065}
1066
1067const tr_info *
1068tr_torrentInfo( const tr_torrent * tor )
1069{
1070    return tr_isTorrent( tor ) ? &tor->info : NULL;
1071}
1072
1073const tr_stat *
1074tr_torrentStatCached( tr_torrent * tor )
1075{
1076    const time_t now = tr_time( );
1077
1078    return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
1079         ? &tor->stats
1080         : tr_torrentStat( tor );
1081}
1082
1083void
1084tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
1085{
1086    assert( tr_isTorrent( tor ) );
1087    assert( state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW );
1088
1089    tor->verifyState = state;
1090    tor->anyDate = tr_time( );
1091}
1092
1093static tr_torrent_activity
1094torrentGetActivity( const tr_torrent * tor )
1095{
1096    const bool is_seed = tr_torrentIsSeed( tor );
1097    assert( tr_isTorrent( tor ) );
1098
1099    if( tor->verifyState == TR_VERIFY_NOW )
1100        return TR_STATUS_CHECK;
1101
1102    if( tor->verifyState == TR_VERIFY_WAIT )
1103        return TR_STATUS_CHECK_WAIT;
1104
1105    if( tor->isRunning )
1106        return is_seed ? TR_STATUS_SEED : TR_STATUS_DOWNLOAD;
1107
1108    if( tor->queuePosition >= 0 ) {
1109        if( is_seed && tr_sessionGetQueueEnabled( tor->session, TR_UP ) )
1110            return TR_STATUS_SEED_WAIT;
1111        if( !is_seed && tr_sessionGetQueueEnabled( tor->session, TR_DOWN ) )
1112            return TR_STATUS_DOWNLOAD_WAIT;
1113    }
1114
1115    return TR_STATUS_STOPPED;
1116}
1117
1118tr_torrent_activity
1119tr_torrentGetActivity( tr_torrent * tor )
1120{
1121    /* FIXME: is this call still needed? */
1122    tr_torrentRecheckCompleteness( tor );
1123
1124    return torrentGetActivity( tor );
1125}
1126
1127static time_t
1128torrentGetIdleSecs( const tr_torrent * tor )
1129{
1130    int idle_secs;
1131    const tr_torrent_activity activity = torrentGetActivity( tor );
1132
1133    if ((activity == TR_STATUS_DOWNLOAD || activity == TR_STATUS_SEED) && tor->startDate != 0)
1134        idle_secs = difftime(tr_time(), MAX(tor->startDate, tor->activityDate));
1135    else
1136        idle_secs = -1;
1137
1138    return idle_secs;
1139}
1140
1141bool
1142tr_torrentIsStalled( const tr_torrent * tor )
1143{
1144    return torrentGetIdleSecs( tor ) > ( tr_sessionGetQueueStalledMinutes( tor->session ) * 60 );
1145}
1146
1147
1148static double
1149getVerifyProgress( const tr_torrent * tor )
1150{
1151    tr_piece_index_t i, n;
1152    tr_piece_index_t checked = 0;
1153
1154    assert( tr_isTorrent( tor ) );
1155
1156    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
1157        if( tor->info.pieces[i].timeChecked )
1158            ++checked;
1159
1160    return checked / (double)tor->info.pieceCount;
1161}
1162
1163const tr_stat *
1164tr_torrentStat( tr_torrent * tor )
1165{
1166    tr_stat *               s;
1167    uint64_t                now;
1168    uint64_t                seedRatioBytesLeft;
1169    uint64_t                seedRatioBytesGoal;
1170    bool                    seedRatioApplies;
1171    uint16_t                seedIdleMinutes;
1172
1173    if( !tor )
1174        return NULL;
1175
1176    assert( tr_isTorrent( tor ) );
1177    tr_torrentLock( tor );
1178
1179    tor->lastStatTime = tr_time( );
1180
1181    s = &tor->stats;
1182    s->id = tor->uniqueId;
1183    s->activity = tr_torrentGetActivity( tor );
1184    s->error = tor->error;
1185    s->queuePosition = tor->queuePosition;
1186    s->isStalled = tr_torrentIsStalled( tor );
1187    tr_strlcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
1188
1189    s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
1190
1191    tr_peerMgrTorrentStats( tor,
1192                            &s->peersConnected,
1193                            &s->webseedsSendingToUs,
1194                            &s->peersSendingToUs,
1195                            &s->peersGettingFromUs,
1196                            s->peersFrom );
1197
1198    now = tr_time_msec( );
1199    s->rawUploadSpeed_KBps     = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_UP ) );
1200    s->pieceUploadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_UP ) );
1201    s->rawDownloadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_DOWN ) );
1202    s->pieceDownloadSpeed_KBps = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_DOWN ) );
1203
1204    s->percentComplete = tr_cpPercentComplete ( &tor->completion );
1205    s->metadataPercentComplete = tr_torrentGetMetadataPercent( tor );
1206
1207    s->percentDone         = tr_cpPercentDone  ( &tor->completion );
1208    s->leftUntilDone       = tr_cpLeftUntilDone( &tor->completion );
1209    s->sizeWhenDone        = tr_cpSizeWhenDone ( &tor->completion );
1210    s->recheckProgress     = s->activity == TR_STATUS_CHECK ? getVerifyProgress( tor ) : 0;
1211    s->activityDate        = tor->activityDate;
1212    s->addedDate           = tor->addedDate;
1213    s->doneDate            = tor->doneDate;
1214    s->startDate           = tor->startDate;
1215    s->secondsSeeding      = tor->secondsSeeding;
1216    s->secondsDownloading  = tor->secondsDownloading;
1217    s->idleSecs            = torrentGetIdleSecs( tor );
1218
1219    s->corruptEver      = tor->corruptCur    + tor->corruptPrev;
1220    s->downloadedEver   = tor->downloadedCur + tor->downloadedPrev;
1221    s->uploadedEver     = tor->uploadedCur   + tor->uploadedPrev;
1222    s->haveValid        = tr_cpHaveValid( &tor->completion );
1223    s->haveUnchecked    = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
1224    s->desiredAvailable = tr_peerMgrGetDesiredAvailable( tor );
1225
1226    s->ratio = tr_getRatio( s->uploadedEver,
1227                            s->downloadedEver ? s->downloadedEver : s->haveValid );
1228
1229    seedRatioApplies = tr_torrentGetSeedRatioBytes( tor, &seedRatioBytesLeft,
1230                                                         &seedRatioBytesGoal );
1231
1232    switch( s->activity )
1233    {
1234        /* etaXLSpeed exists because if we use the piece speed directly,
1235         * brief fluctuations cause the ETA to jump all over the place.
1236         * so, etaXLSpeed is a smoothed-out version of the piece speed
1237         * to dampen the effect of fluctuations */
1238
1239        case TR_STATUS_DOWNLOAD:
1240            if( ( tor->etaDLSpeedCalculatedAt + 800 ) < now ) {
1241                tor->etaDLSpeed_KBps = ( ( tor->etaDLSpeedCalculatedAt + 4000 ) < now )
1242                    ? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
1243                    : ((tor->etaDLSpeed_KBps*4.0) + s->pieceDownloadSpeed_KBps)/5.0; /* smooth across 5 readings */
1244                tor->etaDLSpeedCalculatedAt = now;
1245            }
1246
1247            if( s->leftUntilDone > s->desiredAvailable )
1248                s->eta = TR_ETA_NOT_AVAIL;
1249            else if( tor->etaDLSpeed_KBps < 1 )
1250                s->eta = TR_ETA_UNKNOWN;
1251            else
1252                s->eta = s->leftUntilDone / toSpeedBytes(tor->etaDLSpeed_KBps);
1253
1254            s->etaIdle = TR_ETA_NOT_AVAIL;
1255            break;
1256
1257        case TR_STATUS_SEED: {
1258            if( !seedRatioApplies )
1259                s->eta = TR_ETA_NOT_AVAIL;
1260            else {
1261                if( ( tor->etaULSpeedCalculatedAt + 800 ) < now ) {
1262                    tor->etaULSpeed_KBps = ( ( tor->etaULSpeedCalculatedAt + 4000 ) < now )
1263                        ? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
1264                        : ((tor->etaULSpeed_KBps*4.0) + s->pieceUploadSpeed_KBps)/5.0; /* smooth across 5 readings */
1265                    tor->etaULSpeedCalculatedAt = now;
1266                }
1267                if( tor->etaULSpeed_KBps < 1 )
1268                    s->eta = TR_ETA_UNKNOWN;
1269                else
1270                    s->eta = seedRatioBytesLeft / toSpeedBytes(tor->etaULSpeed_KBps);
1271            }
1272
1273            if( tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle( tor, &seedIdleMinutes ) )
1274                s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
1275            else
1276                s->etaIdle = TR_ETA_NOT_AVAIL;
1277            break;
1278        }
1279
1280        default:
1281            s->eta = TR_ETA_NOT_AVAIL;
1282            s->etaIdle = TR_ETA_NOT_AVAIL;
1283            break;
1284    }
1285
1286    /* s->haveValid is here to make sure a torrent isn't marked 'finished'
1287     * when the user hits "uncheck all" prior to starting the torrent... */
1288    s->finished = tor->finishedSeedingByIdle || (seedRatioApplies && !seedRatioBytesLeft && s->haveValid);
1289
1290    if( !seedRatioApplies || s->finished )
1291        s->seedRatioPercentDone = 1;
1292    else if( !seedRatioBytesGoal ) /* impossible? safeguard for div by zero */
1293        s->seedRatioPercentDone = 0;
1294    else
1295        s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
1296
1297    tr_torrentUnlock( tor );
1298
1299    /* test some of the constraints */
1300    assert( s->sizeWhenDone <= tor->info.totalSize );
1301    assert( s->leftUntilDone <= s->sizeWhenDone );
1302    assert( s->desiredAvailable <= s->leftUntilDone );
1303    return s;
1304}
1305
1306/***
1307****
1308***/
1309
1310static uint64_t
1311fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1312{
1313    uint64_t total = 0;
1314    const tr_file * f = &tor->info.files[index];
1315
1316    if( f->length )
1317    {
1318        tr_block_index_t first;
1319        tr_block_index_t last;
1320        tr_torGetFileBlockRange( tor, index, &first, &last );
1321
1322        if( first == last )
1323        {
1324            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1325                total = f->length;
1326        }
1327        else
1328        {
1329            /* the first block */
1330            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1331                total += tor->blockSize - ( f->offset % tor->blockSize );
1332
1333            /* the middle blocks */
1334            if( first + 1 < last ) {
1335                uint64_t u = tr_bitfieldCountRange( &tor->completion.blockBitfield, first+1, last );
1336                u *= tor->blockSize;
1337                total += u;
1338            }
1339
1340            /* the last block */
1341            if( tr_cpBlockIsComplete( &tor->completion, last ) )
1342                total += ( f->offset + f->length ) - ( (uint64_t)tor->blockSize * last );
1343        }
1344    }
1345
1346    return total;
1347}
1348
1349tr_file_stat *
1350tr_torrentFiles( const tr_torrent * tor,
1351                 tr_file_index_t *  fileCount )
1352{
1353    tr_file_index_t       i;
1354    const tr_file_index_t n = tor->info.fileCount;
1355    tr_file_stat *        files = tr_new0( tr_file_stat, n );
1356    tr_file_stat *        walk = files;
1357    const bool            isSeed = tor->completeness == TR_SEED;
1358
1359    assert( tr_isTorrent( tor ) );
1360
1361    for( i=0; i<n; ++i, ++walk ) {
1362        const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1363        walk->bytesCompleted = b;
1364        walk->progress = tor->info.files[i].length > 0 ? ( (float)b / tor->info.files[i].length ) : 1.0f;
1365    }
1366
1367    if( fileCount )
1368        *fileCount = n;
1369
1370    return files;
1371}
1372
1373void
1374tr_torrentFilesFree( tr_file_stat *            files,
1375                     tr_file_index_t fileCount UNUSED )
1376{
1377    tr_free( files );
1378}
1379
1380/***
1381****
1382***/
1383
1384double*
1385tr_torrentWebSpeeds_KBps( const tr_torrent * tor )
1386{
1387    double * ret = NULL;
1388
1389    if( tr_isTorrent( tor ) )
1390    {
1391        tr_torrentLock( tor );
1392        ret = tr_peerMgrWebSpeeds_KBps( tor );
1393        tr_torrentUnlock( tor );
1394    }
1395
1396    return ret;
1397}
1398
1399tr_peer_stat *
1400tr_torrentPeers( const tr_torrent * tor, int * peerCount )
1401{
1402    tr_peer_stat * ret = NULL;
1403
1404    if( tr_isTorrent( tor ) )
1405    {
1406        tr_torrentLock( tor );
1407        ret = tr_peerMgrPeerStats( tor, peerCount );
1408        tr_torrentUnlock( tor );
1409    }
1410
1411    return ret;
1412}
1413
1414void
1415tr_torrentPeersFree( tr_peer_stat * peers, int peerCount UNUSED )
1416{
1417    tr_free( peers );
1418}
1419
1420tr_tracker_stat *
1421tr_torrentTrackers( const tr_torrent * torrent, int * setmeTrackerCount )
1422{
1423    tr_tracker_stat * ret = NULL;
1424
1425    if( tr_isTorrent( torrent ) )
1426    {
1427        tr_torrentLock( torrent );
1428        ret = tr_announcerStats( torrent, setmeTrackerCount );
1429        tr_torrentUnlock( torrent );
1430    }
1431
1432    return ret;
1433}
1434
1435void
1436tr_torrentTrackersFree( tr_tracker_stat * trackers, int trackerCount )
1437{
1438    tr_announcerStatsFree( trackers, trackerCount );
1439}
1440
1441void
1442tr_torrentAvailability( const tr_torrent * tor, int8_t * tab, int size )
1443{
1444    if( tr_isTorrent( tor ) && ( tab != NULL ) && ( size > 0 ) )
1445    {
1446        tr_torrentLock( tor );
1447        tr_peerMgrTorrentAvailability( tor, tab, size );
1448        tr_torrentUnlock( tor );
1449    }
1450}
1451
1452void
1453tr_torrentAmountFinished( const tr_torrent * tor,
1454                          float *            tab,
1455                          int                size )
1456{
1457    assert( tr_isTorrent( tor ) );
1458
1459    tr_torrentLock( tor );
1460    tr_cpGetAmountDone( &tor->completion, tab, size );
1461    tr_torrentUnlock( tor );
1462}
1463
1464static void
1465tr_torrentResetTransferStats( tr_torrent * tor )
1466{
1467    tr_torrentLock( tor );
1468
1469    tor->downloadedPrev += tor->downloadedCur;
1470    tor->downloadedCur   = 0;
1471    tor->uploadedPrev   += tor->uploadedCur;
1472    tor->uploadedCur     = 0;
1473    tor->corruptPrev    += tor->corruptCur;
1474    tor->corruptCur      = 0;
1475
1476    tr_torrentSetDirty( tor );
1477
1478    tr_torrentUnlock( tor );
1479}
1480
1481void
1482tr_torrentSetHasPiece( tr_torrent *     tor,
1483                       tr_piece_index_t pieceIndex,
1484                       bool             has )
1485{
1486    assert( tr_isTorrent( tor ) );
1487    assert( pieceIndex < tor->info.pieceCount );
1488
1489    if( has )
1490        tr_cpPieceAdd( &tor->completion, pieceIndex );
1491    else
1492        tr_cpPieceRem( &tor->completion, pieceIndex );
1493}
1494
1495/***
1496****
1497***/
1498
1499static void
1500freeTorrent( tr_torrent * tor )
1501{
1502    tr_torrent * t;
1503    tr_session *  session = tor->session;
1504    tr_info *    inf = &tor->info;
1505
1506    assert( !tor->isRunning );
1507
1508    tr_sessionLock( session );
1509
1510    tr_peerMgrRemoveTorrent( tor );
1511
1512    tr_cpDestruct( &tor->completion );
1513
1514    tr_announcerRemoveTorrent( session->announcer, tor );
1515
1516    tr_free( tor->downloadDir );
1517    tr_free( tor->incompleteDir );
1518
1519    if( tor == session->torrentList )
1520        session->torrentList = tor->next;
1521    else for( t = session->torrentList; t != NULL; t = t->next ) {
1522        if( t->next == tor ) {
1523            t->next = tor->next;
1524            break;
1525        }
1526    }
1527
1528    assert( session->torrentCount >= 1 );
1529    session->torrentCount--;
1530
1531    tr_bandwidthDestruct( &tor->bandwidth );
1532
1533    tr_metainfoFree( inf );
1534    tr_free( tor );
1535
1536    tr_sessionUnlock( session );
1537}
1538
1539/**
1540***  Start/Stop Callback
1541**/
1542
1543static void queueRemove( tr_torrent * tor );
1544
1545static void
1546torrentStartImpl( void * vtor )
1547{
1548    time_t now;
1549    tr_torrent * tor = vtor;
1550
1551    assert( tr_isTorrent( tor ) );
1552
1553    tr_sessionLock( tor->session );
1554
1555    tr_torrentRecheckCompleteness( tor );
1556    queueRemove( tor );
1557
1558    now = tr_time( );
1559    tor->isRunning = true;
1560    tor->completeness = tr_cpGetStatus( &tor->completion );
1561    tor->startDate = tor->anyDate = now;
1562    tr_torrentClearError( tor );
1563    tor->finishedSeedingByIdle = false;
1564
1565    tr_torrentResetTransferStats( tor );
1566    tr_announcerTorrentStarted( tor );
1567    tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1568    tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt( 20 );
1569    tor->lpdAnnounceAt = now;
1570    tr_peerMgrStartTorrent( tor );
1571
1572    tr_sessionUnlock( tor->session );
1573}
1574
1575uint64_t
1576tr_torrentGetCurrentSizeOnDisk( const tr_torrent * tor )
1577{
1578    tr_file_index_t i;
1579    uint64_t byte_count = 0;
1580    const tr_file_index_t n = tor->info.fileCount;
1581
1582    for( i=0; i<n; ++i )
1583    {
1584        struct stat sb;
1585        char * filename = tr_torrentFindFile( tor, i );
1586
1587        sb.st_size = 0;
1588        if( filename && !stat( filename, &sb ) )
1589            byte_count += sb.st_size;
1590
1591        tr_free( filename );
1592    }
1593
1594    return byte_count;
1595}
1596
1597static bool
1598torrentShouldQueue( const tr_torrent * tor )
1599{
1600    const tr_direction dir = tr_torrentGetQueueDirection( tor );
1601
1602    return tr_sessionCountQueueFreeSlots( tor->session, dir ) == 0;
1603}
1604
1605static void queueAppend( tr_torrent * tor );
1606
1607static void
1608torrentStart( tr_torrent * tor, bool bypass_queue )
1609{
1610    switch( torrentGetActivity( tor ) )
1611    {
1612        case TR_STATUS_SEED:
1613        case TR_STATUS_DOWNLOAD:
1614            return; /* already started */
1615            break;
1616
1617        case TR_STATUS_SEED_WAIT:
1618        case TR_STATUS_DOWNLOAD_WAIT:
1619            if( !bypass_queue )
1620                return; /* already queued */
1621            break;
1622
1623        case TR_STATUS_CHECK:
1624        case TR_STATUS_CHECK_WAIT:
1625            /* verifying right now... wait until that's done so
1626             * we'll know what completeness to use/announce */
1627            tor->startAfterVerify = true;
1628            return;
1629            break;
1630
1631        case TR_STATUS_STOPPED:
1632            if( !bypass_queue && torrentShouldQueue( tor ) ) {
1633                queueAppend( tor );
1634                return;
1635            }
1636            break;
1637    }
1638
1639    /* don't allow the torrent to be started if the files disappeared */
1640    if( setLocalErrorIfFilesDisappeared( tor ) )
1641        return;
1642
1643    /* otherwise, start it now... */
1644    tr_sessionLock( tor->session );
1645
1646    /* allow finished torrents to be resumed */
1647    if( tr_torrentIsSeedRatioDone( tor ) ) {
1648        tr_torinf( tor, _( "Restarted manually -- disabling its seed ratio" ) );
1649        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
1650    }
1651
1652    /* corresponds to the peer_id sent as a tracker request parameter.
1653     * one tracker admin says: "When the same torrent is opened and
1654     * closed and opened again without quitting Transmission ...
1655     * change the peerid. It would help sometimes if a stopped event
1656     * was missed to ensure that we didn't think someone was cheating. */
1657    tr_peerIdInit( tor->peer_id );
1658    tor->isRunning = 1;
1659    tr_torrentSetDirty( tor );
1660    tr_runInEventThread( tor->session, torrentStartImpl, tor );
1661
1662    tr_sessionUnlock( tor->session );
1663}
1664
1665void
1666tr_torrentStart( tr_torrent * tor )
1667{
1668    if( tr_isTorrent( tor ) )
1669        torrentStart( tor, false );
1670}
1671
1672void
1673tr_torrentStartNow( tr_torrent * tor )
1674{
1675    if( tr_isTorrent( tor ) )
1676        torrentStart( tor, true );
1677}
1678
1679static void
1680torrentRecheckDoneImpl( void * vtor )
1681{
1682    tr_torrent * tor = vtor;
1683    assert( tr_isTorrent( tor ) );
1684
1685    tr_torrentRecheckCompleteness( tor );
1686
1687    if( tor->startAfterVerify ) {
1688        tor->startAfterVerify = false;
1689        torrentStart( tor, false );
1690    }
1691}
1692
1693static void
1694torrentRecheckDoneCB( tr_torrent * tor )
1695{
1696    assert( tr_isTorrent( tor ) );
1697
1698    tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1699}
1700
1701static void
1702verifyTorrent( void * vtor )
1703{
1704    tr_torrent * tor = vtor;
1705
1706    tr_sessionLock( tor->session );
1707
1708    /* if the torrent's already being verified, stop it */
1709    tr_verifyRemove( tor );
1710
1711    /* if the torrent's running, stop it & set the restart-after-verify flag */
1712    if( tor->startAfterVerify || tor->isRunning ) {
1713        /* don't clobber isStopping */
1714        const bool startAfter = tor->isStopping ? false : true;
1715        tr_torrentStop( tor );
1716        tor->startAfterVerify = startAfter;
1717    }
1718
1719    if( setLocalErrorIfFilesDisappeared( tor ) )
1720        tor->startAfterVerify = false;
1721    else
1722        tr_verifyAdd( tor, torrentRecheckDoneCB );
1723
1724    tr_sessionUnlock( tor->session );
1725}
1726
1727void
1728tr_torrentVerify( tr_torrent * tor )
1729{
1730    if( tr_isTorrent( tor ) )
1731        tr_runInEventThread( tor->session, verifyTorrent, tor );
1732}
1733
1734void
1735tr_torrentSave( tr_torrent * tor )
1736{
1737    assert( tr_isTorrent( tor ) );
1738
1739    if( tor->isDirty )
1740    {
1741        tor->isDirty = false;
1742        tr_torrentSaveResume( tor );
1743    }
1744}
1745
1746static void
1747stopTorrent( void * vtor )
1748{
1749    tr_torrent * tor = vtor;
1750    tr_torinf( tor, "Pausing" );
1751
1752    assert( tr_isTorrent( tor ) );
1753
1754    tr_torrentLock( tor );
1755
1756    tr_verifyRemove( tor );
1757    queueRemove( tor );
1758    tr_peerMgrStopTorrent( tor );
1759    tr_announcerTorrentStopped( tor );
1760    tr_cacheFlushTorrent( tor->session->cache, tor );
1761
1762    tr_fdTorrentClose( tor->session, tor->uniqueId );
1763
1764    if( !tor->isDeleting )
1765        tr_torrentSave( tor );
1766
1767    tr_torrentUnlock( tor );
1768}
1769
1770void
1771tr_torrentStop( tr_torrent * tor )
1772{
1773    assert( tr_isTorrent( tor ) );
1774
1775    if( tr_isTorrent( tor ) )
1776    {
1777        tr_sessionLock( tor->session );
1778
1779        tor->isRunning = 0;
1780        tor->isStopping = 0;
1781        tr_torrentSetDirty( tor );
1782        tr_runInEventThread( tor->session, stopTorrent, tor );
1783
1784        tr_sessionUnlock( tor->session );
1785    }
1786}
1787
1788static void
1789closeTorrent( void * vtor )
1790{
1791    tr_benc * d;
1792    tr_torrent * tor = vtor;
1793
1794    assert( tr_isTorrent( tor ) );
1795
1796    d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1797    tr_bencDictAddInt( d, "id", tor->uniqueId );
1798    tr_bencDictAddInt( d, "date", tr_time( ) );
1799
1800    tr_torinf( tor, "%s", _( "Removing torrent" ) );
1801
1802    stopTorrent( tor );
1803
1804    if( tor->isDeleting )
1805    {
1806        tr_metainfoRemoveSaved( tor->session, &tor->info );
1807        tr_torrentRemoveResume( tor );
1808    }
1809
1810    tor->isRunning = 0;
1811    freeTorrent( tor );
1812}
1813
1814void
1815tr_torrentFree( tr_torrent * tor )
1816{
1817    if( tr_isTorrent( tor ) )
1818    {
1819        tr_session * session = tor->session;
1820        assert( tr_isSession( session ) );
1821        tr_sessionLock( session );
1822
1823        tr_torrentClearCompletenessCallback( tor );
1824        tr_runInEventThread( session, closeTorrent, tor );
1825
1826        tr_sessionUnlock( session );
1827    }
1828}
1829
1830struct remove_data
1831{
1832    tr_torrent   * tor;
1833    bool           deleteFlag;
1834    tr_fileFunc  * deleteFunc;
1835};
1836
1837static void tr_torrentDeleteLocalData( tr_torrent *, tr_fileFunc );
1838
1839static void
1840removeTorrent( void * vdata )
1841{
1842    struct remove_data * data = vdata;
1843
1844    if( data->deleteFlag )
1845        tr_torrentDeleteLocalData( data->tor, data->deleteFunc );
1846
1847    tr_torrentClearCompletenessCallback( data->tor );
1848    closeTorrent( data->tor );
1849    tr_free( data );
1850}
1851
1852void
1853tr_torrentRemove( tr_torrent   * tor,
1854                  bool           deleteFlag,
1855                  tr_fileFunc    deleteFunc )
1856{
1857    struct remove_data * data;
1858
1859    assert( tr_isTorrent( tor ) );
1860    tor->isDeleting = 1;
1861
1862    data = tr_new0( struct remove_data, 1 );
1863    data->tor = tor;
1864    data->deleteFlag = deleteFlag;
1865    data->deleteFunc = deleteFunc;
1866    tr_runInEventThread( tor->session, removeTorrent, data );
1867}
1868
1869/**
1870***  Completeness
1871**/
1872
1873static const char *
1874getCompletionString( int type )
1875{
1876    switch( type )
1877    {
1878        /* Translators: this is a minor point that's safe to skip over, but FYI:
1879           "Complete" and "Done" are specific, different terms in Transmission:
1880           "Complete" means we've downloaded every file in the torrent.
1881           "Done" means we're done downloading the files we wanted, but NOT all
1882           that exist */
1883        case TR_PARTIAL_SEED:
1884            return _( "Done" );
1885
1886        case TR_SEED:
1887            return _( "Complete" );
1888
1889        default:
1890            return _( "Incomplete" );
1891    }
1892}
1893
1894static void
1895fireCompletenessChange( tr_torrent       * tor,
1896                        tr_completeness    status,
1897                        bool               wasRunning )
1898{
1899    assert( ( status == TR_LEECH )
1900         || ( status == TR_SEED )
1901         || ( status == TR_PARTIAL_SEED ) );
1902
1903    if( tor->completeness_func )
1904        tor->completeness_func( tor, status, wasRunning,
1905                                tor->completeness_func_user_data );
1906}
1907
1908void
1909tr_torrentSetCompletenessCallback( tr_torrent                    * tor,
1910                                   tr_torrent_completeness_func    func,
1911                                   void                          * user_data )
1912{
1913    assert( tr_isTorrent( tor ) );
1914
1915    tor->completeness_func = func;
1916    tor->completeness_func_user_data = user_data;
1917}
1918
1919void
1920tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1921{
1922    tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1923}
1924
1925void
1926tr_torrentSetRatioLimitHitCallback( tr_torrent                     * tor,
1927                                    tr_torrent_ratio_limit_hit_func  func,
1928                                    void                           * user_data )
1929{
1930    assert( tr_isTorrent( tor ) );
1931
1932    tor->ratio_limit_hit_func = func;
1933    tor->ratio_limit_hit_func_user_data = user_data;
1934}
1935
1936void
1937tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1938{
1939    tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1940}
1941
1942void
1943tr_torrentSetIdleLimitHitCallback( tr_torrent                    * tor,
1944                                   tr_torrent_idle_limit_hit_func  func,
1945                                   void                          * user_data )
1946{
1947    assert( tr_isTorrent( tor ) );
1948
1949    tor->idle_limit_hit_func = func;
1950    tor->idle_limit_hit_func_user_data = user_data;
1951}
1952
1953void
1954tr_torrentClearIdleLimitHitCallback( tr_torrent * torrent )
1955{
1956    tr_torrentSetIdleLimitHitCallback( torrent, NULL, NULL );
1957}
1958
1959static void
1960onSigCHLD( int i UNUSED )
1961{
1962    waitpid( -1, NULL, WNOHANG );
1963}
1964
1965static void
1966torrentCallScript( const tr_torrent * tor, const char * script )
1967{
1968    char timeStr[128];
1969    const time_t now = tr_time( );
1970
1971    tr_strlcpy( timeStr, ctime( &now ), sizeof( timeStr ) );
1972    *strchr( timeStr,'\n' ) = '\0';
1973
1974    if( script && *script )
1975    {
1976        int i;
1977        char * cmd[] = { tr_strdup( script ), NULL };
1978        char * env[] = {
1979            tr_strdup_printf( "TR_APP_VERSION=%s", SHORT_VERSION_STRING ),
1980            tr_strdup_printf( "TR_TIME_LOCALTIME=%s", timeStr ),
1981            tr_strdup_printf( "TR_TORRENT_DIR=%s", tor->currentDir ),
1982            tr_strdup_printf( "TR_TORRENT_ID=%d", tr_torrentId( tor ) ),
1983            tr_strdup_printf( "TR_TORRENT_HASH=%s", tor->info.hashString ),
1984            tr_strdup_printf( "TR_TORRENT_NAME=%s", tr_torrentName( tor ) ),
1985            NULL };
1986
1987        tr_torinf( tor, "Calling script \"%s\"", script );
1988
1989#ifdef WIN32
1990        _spawnvpe( _P_NOWAIT, script, (const char*)cmd, env );
1991#else
1992        signal( SIGCHLD, onSigCHLD );
1993
1994        if( !fork( ) )
1995        {
1996            for (i=0; env[i]; ++i)
1997                putenv(env[i]);
1998            execvp( script, cmd );
1999            _exit( 0 );
2000        }
2001#endif
2002
2003        for( i=0; cmd[i]; ++i ) tr_free( cmd[i] );
2004        for( i=0; env[i]; ++i ) tr_free( env[i] );
2005    }
2006}
2007
2008void
2009tr_torrentRecheckCompleteness( tr_torrent * tor )
2010{
2011    tr_completeness completeness;
2012
2013    assert( tr_isTorrent( tor ) );
2014
2015    tr_torrentLock( tor );
2016
2017    completeness = tr_cpGetStatus( &tor->completion );
2018
2019    if( completeness != tor->completeness )
2020    {
2021        const int recentChange = tor->downloadedCur != 0;
2022        const bool wasLeeching = !tr_torrentIsSeed( tor );
2023        const bool wasRunning = tor->isRunning;
2024
2025        if( recentChange )
2026        {
2027            tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
2028                      getCompletionString( tor->completeness ),
2029                      getCompletionString( completeness ) );
2030        }
2031
2032        tor->completeness = completeness;
2033        tr_fdTorrentClose( tor->session, tor->uniqueId );
2034
2035        if( tr_torrentIsSeed( tor ) )
2036        {
2037            if( recentChange )
2038            {
2039                tr_announcerTorrentCompleted( tor );
2040                tor->doneDate = tor->anyDate = tr_time( );
2041            }
2042
2043            if( wasLeeching && wasRunning )
2044            {
2045                /* clear interested flag on all peers */
2046                tr_peerMgrClearInterest( tor );
2047
2048                /* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
2049                tr_torrentCheckSeedLimit( tor );
2050            }
2051
2052            if( tor->currentDir == tor->incompleteDir )
2053                tr_torrentSetLocation( tor, tor->downloadDir, true, NULL, NULL );
2054
2055            if( tr_sessionIsTorrentDoneScriptEnabled( tor->session ) )
2056                torrentCallScript( tor, tr_sessionGetTorrentDoneScript( tor->session ) );
2057        }
2058
2059        fireCompletenessChange( tor, completeness, wasRunning );
2060
2061        tr_torrentSetDirty( tor );
2062    }
2063
2064    tr_torrentUnlock( tor );
2065}
2066
2067/***
2068****
2069***/
2070
2071static void
2072tr_torrentFireMetadataCompleted( tr_torrent * tor )
2073{
2074    assert( tr_isTorrent( tor ) );
2075
2076    if( tor->metadata_func )
2077        tor->metadata_func( tor, tor->metadata_func_user_data );
2078}
2079
2080void
2081tr_torrentSetMetadataCallback( tr_torrent                * tor,
2082                               tr_torrent_metadata_func    func,
2083                               void                      * user_data )
2084{
2085    assert( tr_isTorrent( tor ) );
2086
2087    tor->metadata_func = func;
2088    tor->metadata_func_user_data = user_data;
2089}
2090
2091
2092/**
2093***  File priorities
2094**/
2095
2096void
2097tr_torrentInitFilePriority( tr_torrent *    tor,
2098                            tr_file_index_t fileIndex,
2099                            tr_priority_t   priority )
2100{
2101    tr_piece_index_t i;
2102    tr_file *        file;
2103
2104    assert( tr_isTorrent( tor ) );
2105    assert( fileIndex < tor->info.fileCount );
2106    assert( tr_isPriority( priority ) );
2107
2108    file = &tor->info.files[fileIndex];
2109    file->priority = priority;
2110    for( i = file->firstPiece; i <= file->lastPiece; ++i )
2111        tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
2112}
2113
2114void
2115tr_torrentSetFilePriorities( tr_torrent             * tor,
2116                             const tr_file_index_t  * files,
2117                             tr_file_index_t          fileCount,
2118                             tr_priority_t            priority )
2119{
2120    tr_file_index_t i;
2121    assert( tr_isTorrent( tor ) );
2122    tr_torrentLock( tor );
2123
2124    for( i = 0; i < fileCount; ++i )
2125        if( files[i] < tor->info.fileCount )
2126            tr_torrentInitFilePriority( tor, files[i], priority );
2127    tr_torrentSetDirty( tor );
2128    tr_peerMgrRebuildRequests( tor );
2129
2130    tr_torrentUnlock( tor );
2131}
2132
2133tr_priority_t*
2134tr_torrentGetFilePriorities( const tr_torrent * tor )
2135{
2136    tr_file_index_t i;
2137    tr_priority_t * p;
2138
2139    assert( tr_isTorrent( tor ) );
2140
2141    tr_torrentLock( tor );
2142    p = tr_new0( tr_priority_t, tor->info.fileCount );
2143    for( i = 0; i < tor->info.fileCount; ++i )
2144        p[i] = tor->info.files[i].priority;
2145    tr_torrentUnlock( tor );
2146
2147    return p;
2148}
2149
2150/**
2151***  File DND
2152**/
2153
2154static void
2155setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
2156{
2157    const int8_t     dnd = !doDownload;
2158    tr_piece_index_t firstPiece;
2159    int8_t           firstPieceDND;
2160    tr_piece_index_t lastPiece;
2161    int8_t           lastPieceDND;
2162    tr_file_index_t  i;
2163    tr_file *        file = &tor->info.files[fileIndex];
2164
2165    file->dnd = dnd;
2166    firstPiece = file->firstPiece;
2167    lastPiece = file->lastPiece;
2168
2169    /* can't set the first piece to DND unless
2170       every file using that piece is DND */
2171    firstPieceDND = dnd;
2172    if( fileIndex > 0 )
2173    {
2174        for( i = fileIndex - 1; firstPieceDND; --i )
2175        {
2176            if( tor->info.files[i].lastPiece != firstPiece )
2177                break;
2178            firstPieceDND = tor->info.files[i].dnd;
2179            if( !i )
2180                break;
2181        }
2182    }
2183
2184    /* can't set the last piece to DND unless
2185       every file using that piece is DND */
2186    lastPieceDND = dnd;
2187    for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
2188    {
2189        if( tor->info.files[i].firstPiece != lastPiece )
2190            break;
2191        lastPieceDND = tor->info.files[i].dnd;
2192    }
2193
2194    if( firstPiece == lastPiece )
2195    {
2196        tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
2197    }
2198    else
2199    {
2200        tr_piece_index_t pp;
2201        tor->info.pieces[firstPiece].dnd = firstPieceDND;
2202        tor->info.pieces[lastPiece].dnd = lastPieceDND;
2203        for( pp = firstPiece + 1; pp < lastPiece; ++pp )
2204            tor->info.pieces[pp].dnd = dnd;
2205    }
2206}
2207
2208void
2209tr_torrentInitFileDLs( tr_torrent             * tor,
2210                       const tr_file_index_t  * files,
2211                       tr_file_index_t          fileCount,
2212                       bool                     doDownload )
2213{
2214    tr_file_index_t i;
2215
2216    assert( tr_isTorrent( tor ) );
2217
2218    tr_torrentLock( tor );
2219
2220    for( i=0; i<fileCount; ++i )
2221        if( files[i] < tor->info.fileCount )
2222            setFileDND( tor, files[i], doDownload );
2223
2224    tr_cpInvalidateDND( &tor->completion );
2225
2226    tr_torrentUnlock( tor );
2227}
2228
2229void
2230tr_torrentSetFileDLs( tr_torrent             * tor,
2231                      const tr_file_index_t  * files,
2232                      tr_file_index_t          fileCount,
2233                      bool                     doDownload )
2234{
2235    assert( tr_isTorrent( tor ) );
2236    tr_torrentLock( tor );
2237
2238    tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
2239    tr_torrentSetDirty( tor );
2240    tr_peerMgrRebuildRequests( tor );
2241
2242    tr_torrentUnlock( tor );
2243}
2244
2245/***
2246****
2247***/
2248
2249tr_priority_t
2250tr_torrentGetPriority( const tr_torrent * tor )
2251{
2252    assert( tr_isTorrent( tor ) );
2253
2254    return tor->bandwidth.priority;
2255}
2256
2257void
2258tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
2259{
2260    assert( tr_isTorrent( tor ) );
2261    assert( tr_isPriority( priority ) );
2262
2263    if( tor->bandwidth.priority != priority )
2264    {
2265        tor->bandwidth.priority = priority;
2266
2267        tr_torrentSetDirty( tor );
2268    }
2269}
2270
2271/***
2272****
2273***/
2274
2275void
2276tr_torrentSetPeerLimit( tr_torrent * tor,
2277                        uint16_t     maxConnectedPeers )
2278{
2279    assert( tr_isTorrent( tor ) );
2280
2281    if ( tor->maxConnectedPeers != maxConnectedPeers )
2282    {
2283        tor->maxConnectedPeers = maxConnectedPeers;
2284
2285        tr_torrentSetDirty( tor );
2286    }
2287}
2288
2289uint16_t
2290tr_torrentGetPeerLimit( const tr_torrent * tor )
2291{
2292    assert( tr_isTorrent( tor ) );
2293
2294    return tor->maxConnectedPeers;
2295}
2296
2297/***
2298****
2299***/
2300
2301void
2302tr_torrentGetBlockLocation( const tr_torrent * tor,
2303                            tr_block_index_t   block,
2304                            tr_piece_index_t * piece,
2305                            uint32_t         * offset,
2306                            uint32_t         * length )
2307{
2308    uint64_t pos = block;
2309    pos *= tor->blockSize;
2310    *piece = pos / tor->info.pieceSize;
2311    *offset = pos - ( *piece * tor->info.pieceSize );
2312    *length = tr_torBlockCountBytes( tor, block );
2313}
2314
2315
2316tr_block_index_t
2317_tr_block( const tr_torrent * tor,
2318           tr_piece_index_t   index,
2319           uint32_t           offset )
2320{
2321    tr_block_index_t ret;
2322
2323    assert( tr_isTorrent( tor ) );
2324
2325    ret = index;
2326    ret *= ( tor->info.pieceSize / tor->blockSize );
2327    ret += offset / tor->blockSize;
2328    return ret;
2329}
2330
2331bool
2332tr_torrentReqIsValid( const tr_torrent * tor,
2333                      tr_piece_index_t   index,
2334                      uint32_t           offset,
2335                      uint32_t           length )
2336{
2337    int err = 0;
2338
2339    assert( tr_isTorrent( tor ) );
2340
2341    if( index >= tor->info.pieceCount )
2342        err = 1;
2343    else if( length < 1 )
2344        err = 2;
2345    else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
2346        err = 3;
2347    else if( length > MAX_BLOCK_SIZE )
2348        err = 4;
2349    else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
2350        err = 5;
2351
2352    if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
2353                              (unsigned long)index,
2354                              (unsigned long)offset,
2355                              (unsigned long)length,
2356                              err );
2357
2358    return !err;
2359}
2360
2361uint64_t
2362tr_pieceOffset( const tr_torrent * tor,
2363                tr_piece_index_t   index,
2364                uint32_t           offset,
2365                uint32_t           length )
2366{
2367    uint64_t ret;
2368
2369    assert( tr_isTorrent( tor ) );
2370
2371    ret = tor->info.pieceSize;
2372    ret *= index;
2373    ret += offset;
2374    ret += length;
2375    return ret;
2376}
2377
2378void
2379tr_torGetFileBlockRange( const tr_torrent        * tor,
2380                         const tr_file_index_t     file,
2381                         tr_block_index_t        * first,
2382                         tr_block_index_t        * last )
2383{
2384    const tr_file * f = &tor->info.files[file];
2385    uint64_t offset = f->offset;
2386    *first = offset / tor->blockSize;
2387    if( !f->length )
2388        *last = *first;
2389    else {
2390        offset += f->length - 1;
2391        *last = offset / tor->blockSize;
2392    }
2393}
2394
2395void
2396tr_torGetPieceBlockRange( const tr_torrent        * tor,
2397                          const tr_piece_index_t    piece,
2398                          tr_block_index_t        * first,
2399                          tr_block_index_t        * last )
2400{
2401    uint64_t offset = tor->info.pieceSize;
2402    offset *= piece;
2403    *first = offset / tor->blockSize;
2404    offset += ( tr_torPieceCountBytes( tor, piece ) - 1 );
2405    *last = offset / tor->blockSize;
2406}
2407
2408
2409/***
2410****
2411***/
2412
2413void
2414tr_torrentSetPieceChecked( tr_torrent * tor, tr_piece_index_t pieceIndex )
2415{
2416    assert( tr_isTorrent( tor ) );
2417    assert( pieceIndex < tor->info.pieceCount );
2418
2419    tor->info.pieces[pieceIndex].timeChecked = tr_time( );
2420}
2421
2422void
2423tr_torrentSetChecked( tr_torrent * tor, time_t when )
2424{
2425    tr_piece_index_t i, n;
2426
2427    assert( tr_isTorrent( tor ) );
2428
2429    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
2430        tor->info.pieces[i].timeChecked = when;
2431}
2432
2433bool
2434tr_torrentCheckPiece( tr_torrent * tor, tr_piece_index_t pieceIndex )
2435{
2436    const bool pass = tr_ioTestPiece( tor, pieceIndex );
2437
2438    tr_deeplog_tor( tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass );
2439    tr_torrentSetHasPiece( tor, pieceIndex, pass );
2440    tr_torrentSetPieceChecked( tor, pieceIndex );
2441    tor->anyDate = tr_time( );
2442    tr_torrentSetDirty( tor );
2443
2444    return pass;
2445}
2446
2447time_t
2448tr_torrentGetFileMTime( const tr_torrent * tor, tr_file_index_t i )
2449{
2450    time_t mtime = 0;
2451    if( !tr_fdFileGetCachedMTime( tor->session, tor->uniqueId, i, &mtime ) )
2452        tr_torrentFindFile2( tor, i, NULL, NULL, &mtime );
2453    return mtime;
2454}
2455
2456bool
2457tr_torrentPieceNeedsCheck( const tr_torrent * tor, tr_piece_index_t p )
2458{
2459    uint64_t unused;
2460    tr_file_index_t f;
2461    const tr_info * inf = tr_torrentInfo( tor );
2462
2463    /* if we've never checked this piece, then it needs to be checked */
2464    if( !inf->pieces[p].timeChecked )
2465        return true;
2466
2467    /* If we think we've completed one of the files in this piece,
2468     * but it's been modified since we last checked it,
2469     * then it needs to be rechecked */
2470    tr_ioFindFileLocation( tor, p, 0, &f, &unused );
2471    for( ; f < inf->fileCount && pieceHasFile( p, &inf->files[f] ); ++f )
2472        if( tr_cpFileIsComplete( &tor->completion, f ) )
2473            if( tr_torrentGetFileMTime( tor, f ) > inf->pieces[p].timeChecked )
2474                return true;
2475
2476    return false;
2477}
2478
2479/***
2480****
2481***/
2482
2483static int
2484compareTrackerByTier( const void * va, const void * vb )
2485{
2486    const tr_tracker_info * a = va;
2487    const tr_tracker_info * b = vb;
2488
2489    /* sort by tier */
2490    if( a->tier != b->tier )
2491        return a->tier - b->tier;
2492
2493    /* get the effects of a stable sort by comparing the two elements' addresses */
2494    return a - b;
2495}
2496
2497bool
2498tr_torrentSetAnnounceList( tr_torrent             * tor,
2499                           const tr_tracker_info  * trackers_in,
2500                           int                      trackerCount )
2501{
2502    int i;
2503    tr_benc metainfo;
2504    bool ok = true;
2505    tr_tracker_info * trackers;
2506
2507    tr_torrentLock( tor );
2508
2509    assert( tr_isTorrent( tor ) );
2510
2511    /* ensure the trackers' tiers are in ascending order */
2512    trackers = tr_memdup( trackers_in, sizeof( tr_tracker_info ) * trackerCount );
2513    qsort( trackers, trackerCount, sizeof( tr_tracker_info ), compareTrackerByTier );
2514
2515    /* look for bad URLs */
2516    for( i=0; ok && i<trackerCount; ++i )
2517        if( !tr_urlIsValidTracker( trackers[i].announce ) )
2518            ok = false;
2519
2520    /* save to the .torrent file */
2521    if( ok && !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2522    {
2523        bool hasInfo;
2524        tr_info tmpInfo;
2525
2526        /* remove the old fields */
2527        tr_bencDictRemove( &metainfo, "announce" );
2528        tr_bencDictRemove( &metainfo, "announce-list" );
2529
2530        /* add the new fields */
2531        if( trackerCount > 0 )
2532        {
2533            tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2534        }
2535        if( trackerCount > 1 )
2536        {
2537            int i;
2538            int prevTier = -1;
2539            tr_benc * tier = NULL;
2540            tr_benc * announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2541
2542            for( i=0; i<trackerCount; ++i ) {
2543                if( prevTier != trackers[i].tier ) {
2544                    prevTier = trackers[i].tier;
2545                    tier = tr_bencListAddList( announceList, 0 );
2546                }
2547                tr_bencListAddStr( tier, trackers[i].announce );
2548            }
2549        }
2550
2551        /* try to parse it back again, to make sure it's good */
2552        memset( &tmpInfo, 0, sizeof( tr_info ) );
2553        if( tr_metainfoParse( tor->session, &metainfo, &tmpInfo,
2554                              &hasInfo, &tor->infoDictLength ) )
2555        {
2556            /* it's good, so keep these new trackers and free the old ones */
2557
2558            tr_info swap;
2559            swap.trackers = tor->info.trackers;
2560            swap.trackerCount = tor->info.trackerCount;
2561            tor->info.trackers = tmpInfo.trackers;
2562            tor->info.trackerCount = tmpInfo.trackerCount;
2563            tmpInfo.trackers = swap.trackers;
2564            tmpInfo.trackerCount = swap.trackerCount;
2565
2566            tr_metainfoFree( &tmpInfo );
2567            tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2568        }
2569
2570        /* cleanup */
2571        tr_bencFree( &metainfo );
2572
2573        /* if we had a tracker-related error on this torrent,
2574         * and that tracker's been removed,
2575         * then clear the error */
2576        if(    ( tor->error == TR_STAT_TRACKER_WARNING )
2577            || ( tor->error == TR_STAT_TRACKER_ERROR ) )
2578        {
2579            bool clear = true;
2580
2581            for( i=0; clear && i<trackerCount; ++i )
2582                if( !strcmp( trackers[i].announce, tor->errorTracker ) )
2583                    clear = false;
2584
2585            if( clear )
2586                tr_torrentClearError( tor );
2587        }
2588
2589        /* tell the announcer to reload this torrent's tracker list */
2590        tr_announcerResetTorrent( tor->session->announcer, tor );
2591    }
2592
2593    tr_torrentUnlock( tor );
2594
2595    tr_free( trackers );
2596    return ok;
2597}
2598
2599/**
2600***
2601**/
2602
2603void
2604tr_torrentSetAddedDate( tr_torrent * tor,
2605                        time_t       t )
2606{
2607    assert( tr_isTorrent( tor ) );
2608
2609    tor->addedDate = t;
2610    tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2611}
2612
2613void
2614tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2615{
2616    assert( tr_isTorrent( tor ) );
2617
2618    tor->activityDate = t;
2619    tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2620}
2621
2622void
2623tr_torrentSetDoneDate( tr_torrent * tor,
2624                       time_t       t )
2625{
2626    assert( tr_isTorrent( tor ) );
2627
2628    tor->doneDate = t;
2629    tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2630}
2631
2632/**
2633***
2634**/
2635
2636uint64_t
2637tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2638{
2639    tr_file_index_t i;
2640    uint64_t bytesLeft = 0;
2641
2642    assert( tr_isTorrent( tor ) );
2643
2644    for( i=0; i<tor->info.fileCount; ++i )
2645    {
2646        if( !tor->info.files[i].dnd )
2647        {
2648            struct stat sb;
2649            const uint64_t length = tor->info.files[i].length;
2650            char * path = tr_torrentFindFile( tor, i );
2651
2652            bytesLeft += length;
2653
2654            if( ( path != NULL ) && !stat( path, &sb )
2655                                 && S_ISREG( sb.st_mode )
2656                                 && ( (uint64_t)sb.st_size <= length ) )
2657                bytesLeft -= sb.st_size;
2658
2659            tr_free( path );
2660        }
2661    }
2662
2663    return bytesLeft;
2664}
2665
2666/****
2667*****  Removing the torrent's local data
2668****/
2669
2670static int
2671vstrcmp( const void * a, const void * b )
2672{
2673    return strcmp( a, b );
2674}
2675
2676static int
2677compareLongestFirst( const void * a, const void * b )
2678{
2679    const size_t alen = strlen( a );
2680    const size_t blen = strlen( b );
2681
2682    if( alen != blen )
2683        return alen > blen ? -1 : 1;
2684
2685    return vstrcmp( a, b );
2686}
2687
2688static void
2689addDirtyFile( const char  * root,
2690              const char  * filename,
2691              tr_ptrArray * dirtyFolders )
2692{
2693    char * dir = tr_dirname( filename );
2694
2695    /* add the parent folders to dirtyFolders until we reach the root or a known-dirty */
2696    while (     ( dir != NULL )
2697             && ( strlen( root ) <= strlen( dir ) )
2698             && ( tr_ptrArrayFindSorted( dirtyFolders, dir, vstrcmp ) == NULL ) )
2699    {
2700        char * tmp;
2701        tr_ptrArrayInsertSorted( dirtyFolders, tr_strdup( dir ), vstrcmp );
2702
2703        tmp = tr_dirname( dir );
2704        tr_free( dir );
2705        dir = tmp;
2706    }
2707
2708    tr_free( dir );
2709}
2710
2711static bool
2712isSystemFile( const char * base )
2713{
2714    int i;
2715    static const char * stockFiles[] = { ".DS_Store", "desktop.ini", "Thumbs.db" };
2716    static const int stockFileCount = sizeof(stockFiles) / sizeof(stockFiles[0]);
2717
2718    for( i=0; i<stockFileCount; ++i )
2719        if( !strcmp( base, stockFiles[i] ) )
2720            return true;
2721
2722    /* check for resource forks. <http://support.apple.com/kb/TA20578> */
2723    if( !memcmp( base, "._", 2 ) )
2724        return true;
2725
2726    return false;
2727}
2728
2729static void
2730deleteLocalFile( const tr_torrent * tor, const char * filename, tr_fileFunc fileFunc )
2731{
2732    struct stat sb;
2733
2734    /* add safeguards for (1) making sure the file exists and
2735       (2) that we haven't somehow walked up past the torrent's top directory... */
2736    if( !stat( filename, &sb ) )
2737        if( !tr_is_same_file( tor->currentDir, filename ) )
2738            fileFunc( filename );
2739}
2740
2741static void
2742walkLocalData( const tr_torrent * tor,
2743               const char       * root,
2744               const char       * dir,
2745               const char       * base,
2746               tr_ptrArray      * torrentFiles,
2747               tr_ptrArray      * folders,
2748               tr_ptrArray      * dirtyFolders,
2749               tr_fileFunc        fileFunc )
2750{
2751    struct stat sb;
2752    char * buf = tr_buildPath( dir, base, NULL );
2753    int i = stat( buf, &sb );
2754
2755    if( !i )
2756    {
2757        DIR * odir = NULL;
2758
2759        if( S_ISDIR( sb.st_mode ) && ( ( odir = opendir ( buf ) ) ) )
2760        {
2761            struct dirent *d;
2762            tr_ptrArrayInsertSorted( folders, tr_strdup( buf ), vstrcmp );
2763            for( d = readdir( odir ); d != NULL; d = readdir( odir ) )
2764                if( d->d_name && strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) )
2765                    walkLocalData( tor, root, buf, d->d_name, torrentFiles, folders, dirtyFolders, fileFunc );
2766            closedir( odir );
2767        }
2768        else if( S_ISREG( sb.st_mode ) && ( sb.st_size > 0 ) )
2769        {
2770            if( isSystemFile( base ) )
2771                deleteLocalFile( tor, buf, fileFunc );
2772            else {
2773                 const char * sub = buf + strlen( tor->currentDir ) + strlen( TR_PATH_DELIMITER_STR );
2774                const bool isTorrentFile = tr_ptrArrayFindSorted( torrentFiles, sub, vstrcmp ) != NULL;
2775                if( !isTorrentFile )
2776                    addDirtyFile( root, buf, dirtyFolders );
2777            }
2778        }
2779    }
2780
2781    tr_free( buf );
2782}
2783
2784static void
2785deleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2786{
2787    int i, n;
2788    char * tmp;
2789    char * root;
2790    char ** s;
2791    tr_file_index_t f;
2792    const char * cpch;
2793    const char * firstFile;
2794    tr_ptrArray torrentFiles = TR_PTR_ARRAY_INIT;
2795    tr_ptrArray folders      = TR_PTR_ARRAY_INIT;
2796    tr_ptrArray dirtyFolders = TR_PTR_ARRAY_INIT; /* dirty == contains non-torrent files */
2797
2798    if( !tr_torrentHasMetadata( tor ) )
2799        return;
2800
2801    firstFile = tor->info.files[0].name;
2802    cpch = strchr( firstFile, TR_PATH_DELIMITER );
2803    tmp = cpch ? tr_strndup( firstFile, cpch - firstFile ) : NULL;
2804    root = tr_buildPath( tor->currentDir, tmp, NULL );
2805
2806    for( f=0; f<tor->info.fileCount; ++f ) {
2807        tr_ptrArrayInsertSorted( &torrentFiles, tr_strdup( tor->info.files[f].name ), vstrcmp );
2808        tr_ptrArrayInsertSorted( &torrentFiles, tr_torrentBuildPartial( tor, f ), vstrcmp );
2809    }
2810
2811    /* build the set of folders and dirtyFolders */
2812    walkLocalData( tor, root, root, NULL, &torrentFiles, &folders, &dirtyFolders, fileFunc );
2813
2814    /* try to remove entire folders first, so that the recycle bin will be tidy */
2815    s = (char**) tr_ptrArrayPeek( &folders, &n );
2816    for( i=0; i<n; ++i )
2817        if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2818            deleteLocalFile( tor, s[i], fileFunc );
2819
2820    /* now blow away any remaining torrent files, such as torrent files in dirty folders */
2821    for( i=0, n=tr_ptrArraySize( &torrentFiles ); i<n; ++i ) {
2822        char * path = tr_buildPath( tor->currentDir, tr_ptrArrayNth( &torrentFiles, i ), NULL );
2823        deleteLocalFile( tor, path, fileFunc );
2824        tr_free( path );
2825    }
2826
2827    /* Now clean out the directories left empty from the previous step.
2828     * Work from deepest to shallowest s.t. lower folders
2829     * won't prevent the upper folders from being deleted */
2830    {
2831        tr_ptrArray cleanFolders = TR_PTR_ARRAY_INIT;
2832        s = (char**) tr_ptrArrayPeek( &folders, &n );
2833        for( i=0; i<n; ++i )
2834            if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2835                tr_ptrArrayInsertSorted( &cleanFolders, s[i], compareLongestFirst );
2836        s = (char**) tr_ptrArrayPeek( &cleanFolders, &n );
2837        for( i=0; i<n; ++i )
2838            deleteLocalFile( tor, s[i], fileFunc );
2839        tr_ptrArrayDestruct( &cleanFolders, NULL );
2840    }
2841
2842    /* cleanup */
2843    tr_ptrArrayDestruct( &dirtyFolders, tr_free );
2844    tr_ptrArrayDestruct( &folders, tr_free );
2845    tr_ptrArrayDestruct( &torrentFiles, tr_free );
2846    tr_free( root );
2847    tr_free( tmp );
2848}
2849
2850static void
2851tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2852{
2853    assert( tr_isTorrent( tor ) );
2854
2855    if( fileFunc == NULL )
2856        fileFunc = remove;
2857
2858    /* close all the files because we're about to delete them */
2859    tr_cacheFlushTorrent( tor->session->cache, tor );
2860    tr_fdTorrentClose( tor->session, tor->uniqueId );
2861
2862    deleteLocalData( tor, fileFunc );
2863}
2864
2865/***
2866****
2867***/
2868
2869struct LocationData
2870{
2871    bool move_from_old_location;
2872    volatile int * setme_state;
2873    volatile double * setme_progress;
2874    char * location;
2875    tr_torrent * tor;
2876};
2877
2878static void
2879setLocation( void * vdata )
2880{
2881    bool err = false;
2882    struct LocationData * data = vdata;
2883    tr_torrent * tor = data->tor;
2884    const bool do_move = data->move_from_old_location;
2885    const char * location = data->location;
2886    double bytesHandled = 0;
2887
2888    assert( tr_isTorrent( tor ) );
2889
2890    tr_dbg( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
2891            tr_torrentName(tor), tor->currentDir, location );
2892
2893    tr_mkdirp( location, 0777 );
2894
2895    if( !tr_is_same_file( location, tor->currentDir ) )
2896    {
2897        tr_file_index_t i;
2898
2899        /* bad idea to move files while they're being verified... */
2900        tr_verifyRemove( tor );
2901
2902        /* try to move the files.
2903         * FIXME: there are still all kinds of nasty cases, like what
2904         * if the target directory runs out of space halfway through... */
2905        for( i=0; !err && i<tor->info.fileCount; ++i )
2906        {
2907            const tr_file * f = &tor->info.files[i];
2908            const char * oldbase;
2909            char * sub;
2910            if( tr_torrentFindFile2( tor, i, &oldbase, &sub, NULL ) )
2911            {
2912                char * oldpath = tr_buildPath( oldbase, sub, NULL );
2913                char * newpath = tr_buildPath( location, sub, NULL );
2914
2915                tr_dbg( "Found file #%d: %s", (int)i, oldpath );
2916
2917                if( do_move && !tr_is_same_file( oldpath, newpath ) )
2918                {
2919                    bool renamed = false;
2920                    errno = 0;
2921                    tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2922                    if( tr_moveFile( oldpath, newpath, &renamed ) )
2923                    {
2924                        err = true;
2925                        tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2926                                        oldpath, newpath, tr_strerror( errno ) );
2927                    }
2928                }
2929
2930                tr_free( newpath );
2931                tr_free( oldpath );
2932                tr_free( sub );
2933            }
2934
2935            if( data->setme_progress )
2936            {
2937                bytesHandled += f->length;
2938                *data->setme_progress = bytesHandled / tor->info.totalSize;
2939            }
2940        }
2941
2942        if( !err )
2943        {
2944            /* blow away the leftover subdirectories in the old location */
2945            if( do_move )
2946                tr_torrentDeleteLocalData( tor, remove );
2947
2948            /* set the new location and reverify */
2949            tr_torrentSetDownloadDir( tor, location );
2950        }
2951    }
2952
2953    if( !err && do_move )
2954    {
2955        tr_free( tor->incompleteDir );
2956        tor->incompleteDir = NULL;
2957        tor->currentDir = tor->downloadDir;
2958    }
2959
2960    if( data->setme_state )
2961        *data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2962
2963    /* cleanup */
2964    tr_free( data->location );
2965    tr_free( data );
2966}
2967
2968void
2969tr_torrentSetLocation( tr_torrent       * tor,
2970                       const char       * location,
2971                       bool               move_from_old_location,
2972                       volatile double  * setme_progress,
2973                       volatile int     * setme_state )
2974{
2975    struct LocationData * data;
2976
2977    assert( tr_isTorrent( tor ) );
2978
2979    if( setme_state )
2980        *setme_state = TR_LOC_MOVING;
2981    if( setme_progress )
2982        *setme_progress = 0;
2983
2984    /* run this in the libtransmission thread */
2985    data = tr_new( struct LocationData, 1 );
2986    data->tor = tor;
2987    data->location = tr_strdup( location );
2988    data->move_from_old_location = move_from_old_location;
2989    data->setme_state = setme_state;
2990    data->setme_progress = setme_progress;
2991    tr_runInEventThread( tor->session, setLocation, data );
2992}
2993
2994/***
2995****
2996***/
2997
2998void
2999tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
3000{
3001    char * sub;
3002    const char * base;
3003    const tr_info * inf = &tor->info;
3004    const tr_file * f = &inf->files[fileNum];
3005    tr_piece * p;
3006    const tr_piece * pend;
3007    const time_t now = tr_time( );
3008
3009    /* close the file so that we can reopen in read-only mode as needed */
3010    tr_fdFileClose( tor->session, tor, fileNum );
3011
3012    /* now that the file is complete and closed, we can start watching its
3013     * mtime timestamp for changes to know if we need to reverify pieces */
3014    for( p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p )
3015        p->timeChecked = now;
3016
3017    /* if the torrent's current filename isn't the same as the one in the
3018     * metadata -- for example, if it had the ".part" suffix appended to
3019     * it until now -- then rename it to match the one in the metadata */
3020    if( tr_torrentFindFile2( tor, fileNum, &base, &sub, NULL ) )
3021    {
3022        if( strcmp( sub, f->name ) )
3023        {
3024            char * oldpath = tr_buildPath( base, sub, NULL );
3025            char * newpath = tr_buildPath( base, f->name, NULL );
3026
3027            if( rename( oldpath, newpath ) )
3028                tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
3029
3030            tr_free( newpath );
3031            tr_free( oldpath );
3032        }
3033
3034        tr_free( sub );
3035    }
3036}
3037
3038/***
3039****
3040***/
3041
3042#ifdef SYS_DARWIN
3043 #define TR_STAT_MTIME(sb) ((sb).st_mtimespec.tv_sec)
3044#else
3045 #define TR_STAT_MTIME(sb) ((sb).st_mtime)
3046#endif
3047
3048
3049static bool
3050fileExists( const char * filename, time_t * mtime )
3051{
3052    struct stat sb;
3053    const bool ok = !stat( filename, &sb );
3054
3055    if( ok && ( mtime != NULL ) )
3056        *mtime = TR_STAT_MTIME( sb );
3057
3058    return ok;
3059}
3060
3061bool
3062tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
3063                     const char ** base, char ** subpath, time_t * mtime )
3064{
3065    char * part = NULL;
3066    const tr_file * file;
3067    const char * b = NULL;
3068    const char * s = NULL;
3069
3070    assert( tr_isTorrent( tor ) );
3071    assert( fileNum < tor->info.fileCount );
3072
3073    file = &tor->info.files[fileNum];
3074
3075    if( b == NULL ) {
3076        char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
3077        if( fileExists( filename, mtime ) ) {
3078            b = tor->downloadDir;
3079            s = file->name;
3080        }
3081        tr_free( filename );
3082    }
3083
3084    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3085        char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
3086        if( fileExists( filename, mtime ) ) {
3087            b = tor->incompleteDir;
3088            s = file->name;
3089        }
3090        tr_free( filename );
3091    }
3092
3093    if( b == NULL )
3094        part = tr_torrentBuildPartial( tor, fileNum );
3095
3096    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3097        char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
3098        if( fileExists( filename, mtime ) ) {
3099            b = tor->incompleteDir;
3100            s = part;
3101        }
3102        tr_free( filename );
3103    }
3104
3105    if( b == NULL) {
3106        char * filename = tr_buildPath( tor->downloadDir, part, NULL );
3107        if( fileExists( filename, mtime ) ) {
3108            b = tor->downloadDir;
3109            s = part;
3110        }
3111        tr_free( filename );
3112    }
3113
3114    if( base != NULL )
3115        *base = b;
3116    if( subpath != NULL )
3117        *subpath = tr_strdup( s );
3118
3119    tr_free( part );
3120    return b != NULL;
3121}
3122
3123char*
3124tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
3125{
3126    char * subpath;
3127    char * ret = NULL;
3128    const char * base;
3129
3130    if( tr_torrentFindFile2( tor, fileNum, &base, &subpath, NULL ) )
3131    {
3132        ret = tr_buildPath( base, subpath, NULL );
3133        tr_free( subpath );
3134    }
3135
3136    return ret;
3137}
3138
3139/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
3140static void
3141refreshCurrentDir( tr_torrent * tor )
3142{
3143    const char * dir = NULL;
3144
3145    if( tor->incompleteDir == NULL )
3146        dir = tor->downloadDir;
3147    else if( !tr_torrentHasMetadata( tor ) ) /* no files to find */
3148        dir = tor->incompleteDir;
3149    else if( !tr_torrentFindFile2( tor, 0, &dir, NULL, NULL ) )
3150        dir = tor->incompleteDir;
3151
3152    assert( dir != NULL );
3153    assert( ( dir == tor->downloadDir ) || ( dir == tor->incompleteDir ) );
3154    tor->currentDir = dir;
3155}
3156
3157char*
3158tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
3159{
3160    return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
3161}
3162
3163/***
3164****
3165***/
3166
3167static int
3168compareTorrentByQueuePosition( const void * va, const void * vb )
3169{
3170    const tr_torrent * a = * (const tr_torrent **) va;
3171    const tr_torrent * b = * (const tr_torrent **) vb;
3172
3173    return a->queuePosition - b->queuePosition;
3174}
3175
3176static bool
3177queueIsSequenced( tr_torrent * tor )
3178{
3179    int i ;
3180    int n ;
3181    bool is_sequenced = true;
3182    tr_session * session = tor->session;
3183    tr_direction direction = tr_torrentGetQueueDirection( tor );
3184    tr_torrent ** tmp = tr_new( tr_torrent *, session->torrentCount );
3185
3186    /* get all the torrents in that queue */
3187    n = 0;
3188    tor = NULL;
3189    while(( tor = tr_torrentNext( session, tor )))
3190        if( tr_torrentIsQueued( tor ) && ( direction == tr_torrentGetQueueDirection( tor ) ) )
3191            tmp[n++] = tor;
3192
3193    /* sort them by position */
3194    qsort( tmp, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3195
3196#if 0
3197    /* print them */
3198    fprintf( stderr, "sequence: " );
3199    for( i=0; i<n; ++i )
3200        fprintf( stderr, "%d ", tmp[i]->queuePosition );
3201    fprintf( stderr, "\n" );
3202#endif
3203
3204    /* test them */
3205    for( i=0; is_sequenced && i<n; ++i )
3206        if( tmp[i]->queuePosition != i )
3207            is_sequenced = false;
3208
3209    tr_free( tmp );
3210    return is_sequenced;
3211}
3212
3213int
3214tr_torrentGetQueuePosition( const tr_torrent * tor )
3215{
3216    return tor->queuePosition;
3217}
3218
3219void
3220tr_torrentSetQueuePosition( tr_torrent * tor, int pos )
3221{
3222    if( tr_torrentIsQueued( tor ) )
3223    {
3224        int back = -1;
3225        tr_torrent * walk;
3226        const tr_direction direction = tr_torrentGetQueueDirection( tor );
3227        const int old_pos = tor->queuePosition;
3228        const time_t now = tr_time( );
3229
3230        if( pos < 0 )
3231            pos = 0;
3232
3233        tor->queuePosition = -1;
3234
3235        walk = NULL;
3236        while(( walk = tr_torrentNext( tor->session, walk )))
3237        {
3238            if( tr_torrentIsQueued( walk ) && ( tr_torrentGetQueueDirection( walk ) == direction ) )
3239            {
3240                if( old_pos < pos ) {
3241                    if( ( old_pos <= walk->queuePosition ) && ( walk->queuePosition <= pos ) ) {
3242                        walk->queuePosition--;
3243                        walk->anyDate = now;
3244                    }
3245                }
3246
3247                if( old_pos > pos ) {
3248                    if( ( pos <= walk->queuePosition ) && ( walk->queuePosition < old_pos ) ) {
3249                        walk->queuePosition++;
3250                        walk->anyDate = now;
3251                    }
3252                }
3253
3254                if( back < walk->queuePosition )
3255                    back = walk->queuePosition;
3256            }
3257        }
3258
3259        tor->queuePosition = MIN( pos, (back+1) );
3260        tor->anyDate = now;
3261    }
3262
3263    assert( queueIsSequenced( tor ) );
3264}
3265
3266void
3267tr_torrentsQueueMoveTop( tr_torrent ** torrents_in, int n )
3268{
3269    int i;
3270    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3271    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3272    for( i=n-1; i>=0; --i )
3273        tr_torrentSetQueuePosition( torrents[i], 0 );
3274    tr_free( torrents );
3275}
3276
3277void
3278tr_torrentsQueueMoveUp( tr_torrent ** torrents_in, int n )
3279{
3280    int i;
3281    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3282    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3283    for( i=0; i<n; ++i )
3284        tr_torrentSetQueuePosition( torrents[i], torrents[i]->queuePosition - 1 );
3285    tr_free( torrents );
3286}
3287
3288void
3289tr_torrentsQueueMoveDown( tr_torrent ** torrents_in, int n )
3290{
3291    int i;
3292    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3293    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3294    for( i=n-1; i>=0; --i )
3295        tr_torrentSetQueuePosition( torrents[i], torrents[i]->queuePosition + 1 );
3296    tr_free( torrents );
3297}
3298
3299void
3300tr_torrentsQueueMoveBottom( tr_torrent ** torrents_in, int n )
3301{
3302    int i;
3303    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3304    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3305    for( i=0; i<n; ++i )
3306        tr_torrentSetQueuePosition( torrents[i], INT_MAX );
3307    tr_free( torrents );
3308}
3309
3310/* Ensure that the torrents queued for downloads have queuePositions contiguous from [0...n] */
3311static void
3312queueResequence( tr_session * session, tr_direction direction )
3313{
3314    int i;
3315    int n;
3316    tr_torrent * tor = NULL;
3317    tr_torrent ** tmp = tr_new( tr_torrent *, session->torrentCount );
3318    const time_t now = tr_time( );
3319
3320    assert( tr_isSession( session ) );
3321    assert( tr_isDirection( direction ) );
3322
3323    /* get all the torrents in that queue */
3324    n = 0;
3325    while(( tor = tr_torrentNext( session, tor ))) {
3326        if( direction == tr_torrentGetQueueDirection( tor )) {
3327            const int position = tr_torrentGetQueuePosition( tor );
3328            if( position >= 0 )
3329                tmp[n++] = tor;
3330        }
3331    }
3332
3333    /* sort them by position */
3334    qsort( tmp, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3335
3336    /* sequence them... */
3337    for( i=0; i<n; ++i ) {
3338        tr_torrent * tor = tmp[i];
3339        if( tor->queuePosition != i ) {
3340            tor->queuePosition = i;
3341            tor->anyDate = now;
3342        }
3343    }
3344
3345    tr_free( tmp );
3346}
3347
3348static void
3349queueRemove( tr_torrent * tor )
3350{
3351    if( tr_torrentIsQueued( tor ) )
3352    {
3353        tor->queuePosition = -1;
3354        queueResequence( tor->session, tr_torrentGetQueueDirection( tor ) );
3355    }
3356}
3357
3358static void
3359queueAppend( tr_torrent * tor )
3360{
3361    if( !tr_torrentIsQueued( tor ) )
3362    {
3363        /* tr_torrentSetQueuePosition() requres the torrent to be queued,
3364           so init tor->queuePosition to the back... */
3365        tor->queuePosition = INT_MAX;
3366
3367        tr_torrentSetQueuePosition( tor, INT_MAX );
3368    }
3369}
Note: See TracBrowser for help on using the repository browser.