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source: trunk/libtransmission/torrent.c @ 11818

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Last change on this file since 11818 was 11818, checked in by jordan, 12 years ago
(trunk libT) #3973 "JIT verification verifies fresh downloaded torrents" -- remove a debugging printf() statement that shouldn't have been checked in.
Property svn:keywords set to `Date Rev Author Id`
File size: 81.5 KB

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1	/*
2	* This file Copyright (C) Mnemosyne LLC
3	*
4	* This file is licensed by the GPL version 2. Works owned by the
5	* Transmission project are granted a special exemption to clause 2(b)
6	* so that the bulk of its code can remain under the MIT license.
7	* This exemption does not extend to derived works not owned by
8	* the Transmission project.
9	*
10	* $Id: torrent.c 11818 2011-02-02 23:33:25Z jordan $
11	*/
12
13	#include <sys/types.h> /* stat */
14	#include <sys/stat.h> /* stat */
15	#ifndef WIN32
16	#include <sys/wait.h> /* wait() */
17	#else
18	#include <process.h>
19	#define waitpid(pid, status, options) _cwait(status, pid, WAIT_CHILD)
20	#endif
21	#include <unistd.h> /* stat */
22	#include <dirent.h>
23
24	#include <assert.h>
25	#include <limits.h> /* INT_MAX */
26	#include <math.h>
27	#include <stdarg.h>
28	#include <string.h> /* memcmp */
29	#include <stdlib.h> /* qsort */
30
31	#include <event2/util.h> /* evutil_vsnprintf() */
32
33	#include "transmission.h"
34	#include "announcer.h"
35	#include "bandwidth.h"
36	#include "bencode.h"
37	#include "cache.h"
38	#include "completion.h"
39	#include "crypto.h" /* for tr_sha1 */
40	#include "resume.h"
41	#include "fdlimit.h" /* tr_fdTorrentClose */
42	#include "inout.h" /* tr_ioTestPiece() */
43	#include "magnet.h"
44	#include "metainfo.h"
45	#include "peer-common.h" /* MAX_BLOCK_SIZE */
46	#include "peer-mgr.h"
47	#include "platform.h" /* TR_PATH_DELIMITER_STR */
48	#include "ptrarray.h"
49	#include "session.h"
50	#include "torrent.h"
51	#include "torrent-magnet.h"
52	#include "trevent.h" /* tr_runInEventThread() */
53	#include "utils.h"
54	#include "verify.h"
55	#include "version.h"
56
57	/***
58	****
59	***/
60
61	#define tr_deeplog_tor( tor, ... ) \
62	do { \
63	if( tr_deepLoggingIsActive( ) ) \
64	tr_deepLog( __FILE__, __LINE__, tr_torrentName( tor ), __VA_ARGS__ ); \
65	} while( 0 )
66
67	/***
68	****
69	***/
70
71	int
72	tr_torrentId( const tr_torrent * tor )
73	{
74	return tor->uniqueId;
75	}
76
77	tr_torrent*
78	tr_torrentFindFromId( tr_session * session, int id )
79	{
80	tr_torrent * tor = NULL;
81
82	while(( tor = tr_torrentNext( session, tor )))
83	if( tor->uniqueId == id )
84	return tor;
85
86	return NULL;
87	}
88
89	tr_torrent*
90	tr_torrentFindFromHashString( tr_session * session, const char * str )
91	{
92	tr_torrent * tor = NULL;
93
94	while(( tor = tr_torrentNext( session, tor )))
95	if( !strcasecmp( str, tor->info.hashString ) )
96	return tor;
97
98	return NULL;
99	}
100
101	tr_torrent*
102	tr_torrentFindFromHash( tr_session * session, const uint8_t * torrentHash )
103	{
104	tr_torrent * tor = NULL;
105
106	while(( tor = tr_torrentNext( session, tor )))
107	if( tor->info.hash == torrentHash )
108	if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
109	return tor;
110
111	return NULL;
112	}
113
114	tr_torrent*
115	tr_torrentFindFromMagnetLink( tr_session * session, const char * magnet )
116	{
117	tr_magnet_info * info;
118	tr_torrent * tor = NULL;
119
120	if(( info = tr_magnetParse( magnet )))
121	{
122	tor = tr_torrentFindFromHash( session, info->hash );
123	tr_magnetFree( info );
124	}
125
126	return tor;
127	}
128
129	tr_torrent*
130	tr_torrentFindFromObfuscatedHash( tr_session * session,
131	const uint8_t * obfuscatedTorrentHash )
132	{
133	tr_torrent * tor = NULL;
134
135	while(( tor = tr_torrentNext( session, tor )))
136	if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
137	SHA_DIGEST_LENGTH ) )
138	return tor;
139
140	return NULL;
141	}
142
143	tr_bool
144	tr_torrentIsPieceTransferAllowed( const tr_torrent * tor,
145	tr_direction direction )
146	{
147	int limit;
148	tr_bool allowed = TRUE;
149
150	if( tr_torrentUsesSpeedLimit( tor, direction ) )
151	if( tr_torrentGetSpeedLimit_Bps( tor, direction ) <= 0 )
152	allowed = FALSE;
153
154	if( tr_torrentUsesSessionLimits( tor ) )
155	if( tr_sessionGetActiveSpeedLimit_Bps( tor->session, direction, &limit ) )
156	if( limit <= 0 )
157	allowed = FALSE;
158
159	return allowed;
160	}
161
162	/***
163	**** PER-TORRENT UL / DL SPEEDS
164	***/
165
166	void
167	tr_torrentSetSpeedLimit_Bps( tr_torrent * tor, tr_direction dir, int Bps )
168	{
169	assert( tr_isTorrent( tor ) );
170	assert( tr_isDirection( dir ) );
171	assert( Bps >= 0 );
172
173	if( tr_bandwidthSetDesiredSpeed_Bps( tor->bandwidth, dir, Bps ) )
174	tr_torrentSetDirty( tor );
175	}
176	void
177	tr_torrentSetSpeedLimit_KBps( tr_torrent * tor, tr_direction dir, int KBps )
178	{
179	tr_torrentSetSpeedLimit_Bps( tor, dir, toSpeedBytes( KBps ) );
180	}
181
182	int
183	tr_torrentGetSpeedLimit_Bps( const tr_torrent * tor, tr_direction dir )
184	{
185	assert( tr_isTorrent( tor ) );
186	assert( tr_isDirection( dir ) );
187
188	return tr_bandwidthGetDesiredSpeed_Bps( tor->bandwidth, dir );
189	}
190	int
191	tr_torrentGetSpeedLimit_KBps( const tr_torrent * tor, tr_direction dir )
192	{
193	return toSpeedKBps( tr_torrentGetSpeedLimit_Bps( tor, dir ) );
194	}
195
196	void
197	tr_torrentUseSpeedLimit( tr_torrent * tor, tr_direction dir, tr_bool do_use )
198	{
199	assert( tr_isTorrent( tor ) );
200	assert( tr_isDirection( dir ) );
201
202	if( tr_bandwidthSetLimited( tor->bandwidth, dir, do_use ) )
203	tr_torrentSetDirty( tor );
204	}
205
206	tr_bool
207	tr_torrentUsesSpeedLimit( const tr_torrent * tor, tr_direction dir )
208	{
209	assert( tr_isTorrent( tor ) );
210	assert( tr_isDirection( dir ) );
211
212	return tr_bandwidthIsLimited( tor->bandwidth, dir );
213	}
214
215	void
216	tr_torrentUseSessionLimits( tr_torrent * tor, tr_bool doUse )
217	{
218	tr_bool changed;
219
220	assert( tr_isTorrent( tor ) );
221
222	changed = tr_bandwidthHonorParentLimits( tor->bandwidth, TR_UP, doUse );
223	changed \|= tr_bandwidthHonorParentLimits( tor->bandwidth, TR_DOWN, doUse );
224
225	if( changed )
226	tr_torrentSetDirty( tor );
227	}
228
229	tr_bool
230	tr_torrentUsesSessionLimits( const tr_torrent * tor )
231	{
232	assert( tr_isTorrent( tor ) );
233
234	return tr_bandwidthAreParentLimitsHonored( tor->bandwidth, TR_UP );
235	}
236
237	/***
238	****
239	***/
240
241	void
242	tr_torrentSetRatioMode( tr_torrent * tor, tr_ratiolimit mode )
243	{
244	assert( tr_isTorrent( tor ) );
245	assert( mode==TR_RATIOLIMIT_GLOBAL \|\| mode==TR_RATIOLIMIT_SINGLE \|\| mode==TR_RATIOLIMIT_UNLIMITED );
246
247	if( mode != tor->ratioLimitMode )
248	{
249	tor->ratioLimitMode = mode;
250
251	tr_torrentSetDirty( tor );
252	}
253	}
254
255	tr_ratiolimit
256	tr_torrentGetRatioMode( const tr_torrent * tor )
257	{
258	assert( tr_isTorrent( tor ) );
259
260	return tor->ratioLimitMode;
261	}
262
263	void
264	tr_torrentSetRatioLimit( tr_torrent * tor, double desiredRatio )
265	{
266	assert( tr_isTorrent( tor ) );
267
268	if( (int)(desiredRatio100.0) != (int)(tor->desiredRatio100.0) )
269	{
270	tor->desiredRatio = desiredRatio;
271
272	tr_torrentSetDirty( tor );
273	}
274	}
275
276	double
277	tr_torrentGetRatioLimit( const tr_torrent * tor )
278	{
279	assert( tr_isTorrent( tor ) );
280
281	return tor->desiredRatio;
282	}
283
284	tr_bool
285	tr_torrentGetSeedRatio( const tr_torrent * tor, double * ratio )
286	{
287	tr_bool isLimited;
288
289	switch( tr_torrentGetRatioMode( tor ) )
290	{
291	case TR_RATIOLIMIT_SINGLE:
292	isLimited = TRUE;
293	if( ratio )
294	*ratio = tr_torrentGetRatioLimit( tor );
295	break;
296
297	case TR_RATIOLIMIT_GLOBAL:
298	isLimited = tr_sessionIsRatioLimited( tor->session );
299	if( isLimited && ratio )
300	*ratio = tr_sessionGetRatioLimit( tor->session );
301	break;
302
303	default: /* TR_RATIOLIMIT_UNLIMITED */
304	isLimited = FALSE;
305	break;
306	}
307
308	return isLimited;
309	}
310
311	/* returns true if the seed ratio applies --
312	* it applies if the torrent's a seed AND it has a seed ratio set */
313	static tr_bool
314	tr_torrentGetSeedRatioBytes( tr_torrent * tor,
315	uint64_t * setmeLeft,
316	uint64_t * setmeGoal )
317	{
318	double seedRatio;
319	tr_bool seedRatioApplies = FALSE;
320
321	if( tr_torrentGetSeedRatio( tor, &seedRatio ) )
322	{
323	const uint64_t u = tor->uploadedCur + tor->uploadedPrev;
324	const uint64_t d = tor->downloadedCur + tor->downloadedPrev;
325	const uint64_t baseline = d ? d : tr_cpSizeWhenDone( &tor->completion );
326	const uint64_t goal = baseline * seedRatio;
327	if( setmeLeft ) *setmeLeft = goal > u ? goal - u : 0;
328	if( setmeGoal ) *setmeGoal = goal;
329	seedRatioApplies = tr_torrentIsSeed( tor );
330	}
331
332	return seedRatioApplies;
333	}
334
335	static tr_bool
336	tr_torrentIsSeedRatioDone( tr_torrent * tor )
337	{
338	uint64_t bytesLeft;
339	return tr_torrentGetSeedRatioBytes( tor, &bytesLeft, NULL ) && !bytesLeft;
340	}
341
342	/***
343	****
344	***/
345
346	void
347	tr_torrentSetIdleMode( tr_torrent * tor, tr_idlelimit mode )
348	{
349	assert( tr_isTorrent( tor ) );
350	assert( mode==TR_IDLELIMIT_GLOBAL \|\| mode==TR_IDLELIMIT_SINGLE \|\| mode==TR_IDLELIMIT_UNLIMITED );
351
352	if( mode != tor->idleLimitMode )
353	{
354	tor->idleLimitMode = mode;
355
356	tr_torrentSetDirty( tor );
357	}
358	}
359
360	tr_idlelimit
361	tr_torrentGetIdleMode( const tr_torrent * tor )
362	{
363	assert( tr_isTorrent( tor ) );
364
365	return tor->idleLimitMode;
366	}
367
368	void
369	tr_torrentSetIdleLimit( tr_torrent * tor, uint16_t idleMinutes )
370	{
371	assert( tr_isTorrent( tor ) );
372
373	if( idleMinutes > 0 )
374	{
375	tor->idleLimitMinutes = idleMinutes;
376
377	tr_torrentSetDirty( tor );
378	}
379	}
380
381	uint16_t
382	tr_torrentGetIdleLimit( const tr_torrent * tor )
383	{
384	assert( tr_isTorrent( tor ) );
385
386	return tor->idleLimitMinutes;
387	}
388
389	tr_bool
390	tr_torrentGetSeedIdle( const tr_torrent * tor, uint16_t * idleMinutes )
391	{
392	tr_bool isLimited;
393
394	switch( tr_torrentGetIdleMode( tor ) )
395	{
396	case TR_IDLELIMIT_SINGLE:
397	isLimited = TRUE;
398	if( idleMinutes )
399	*idleMinutes = tr_torrentGetIdleLimit( tor );
400	break;
401
402	case TR_IDLELIMIT_GLOBAL:
403	isLimited = tr_sessionIsIdleLimited( tor->session );
404	if( isLimited && idleMinutes )
405	*idleMinutes = tr_sessionGetIdleLimit( tor->session );
406	break;
407
408	default: /* TR_IDLELIMIT_UNLIMITED */
409	isLimited = FALSE;
410	break;
411	}
412
413	return isLimited;
414	}
415
416	static tr_bool
417	tr_torrentIsSeedIdleLimitDone( tr_torrent * tor )
418	{
419	uint16_t idleMinutes;
420	return tr_torrentGetSeedIdle( tor, &idleMinutes )
421	&& difftime(tr_time(), MAX(tor->startDate, tor->activityDate)) >= idleMinutes * 60u;
422	}
423
424	/***
425	****
426	***/
427
428	void
429	tr_torrentCheckSeedLimit( tr_torrent * tor )
430	{
431	assert( tr_isTorrent( tor ) );
432
433	if( !tor->isRunning \|\| !tr_torrentIsSeed( tor ) )
434	return;
435
436	/* if we're seeding and reach our seed ratio limit, stop the torrent */
437	if( tr_torrentIsSeedRatioDone( tor ) )
438	{
439	tr_torinf( tor, "Seed ratio reached; pausing torrent" );
440
441	tor->isStopping = TRUE;
442
443	/* maybe notify the client */
444	if( tor->ratio_limit_hit_func != NULL )
445	tor->ratio_limit_hit_func( tor, tor->ratio_limit_hit_func_user_data );
446	}
447	/* if we're seeding and reach our inactiviy limit, stop the torrent */
448	else if( tr_torrentIsSeedIdleLimitDone( tor ) )
449	{
450	tr_torinf( tor, "Seeding idle limit reached; pausing torrent" );
451
452	tor->isStopping = TRUE;
453	tor->finishedSeedingByIdle = TRUE;
454
455	/* maybe notify the client */
456	if( tor->idle_limit_hit_func != NULL )
457	tor->idle_limit_hit_func( tor, tor->idle_limit_hit_func_user_data );
458	}
459	}
460
461	/***
462	****
463	***/
464
465	void
466	tr_torrentSetLocalError( tr_torrent * tor, const char * fmt, ... )
467	{
468	va_list ap;
469
470	assert( tr_isTorrent( tor ) );
471
472	va_start( ap, fmt );
473	tor->error = TR_STAT_LOCAL_ERROR;
474	tor->errorTracker[0] = '\0';
475	evutil_vsnprintf( tor->errorString, sizeof( tor->errorString ), fmt, ap );
476	va_end( ap );
477
478	tr_torerr( tor, "%s", tor->errorString );
479
480	if( tor->isRunning )
481	tor->isStopping = TRUE;
482	}
483
484	static void
485	tr_torrentClearError( tr_torrent * tor )
486	{
487	assert( tr_isTorrent( tor ) );
488
489	tor->error = TR_STAT_OK;
490	tor->errorString[0] = '\0';
491	tor->errorTracker[0] = '\0';
492	}
493
494	static void
495	onTrackerResponse( tr_torrent * tor, const tr_tracker_event * event, void * unused UNUSED )
496	{
497	switch( event->messageType )
498	{
499	case TR_TRACKER_PEERS:
500	{
501	size_t i;
502	const int8_t seedProbability = event->seedProbability;
503	const tr_bool allAreSeeds = seedProbability == 100;
504
505	if( allAreSeeds )
506	tr_tordbg( tor, "Got %zu seeds from tracker", event->pexCount );
507	else
508	tr_tordbg( tor, "Got %zu peers from tracker", event->pexCount );
509
510	for( i = 0; i < event->pexCount; ++i )
511	tr_peerMgrAddPex( tor, TR_PEER_FROM_TRACKER, &event->pex[i], seedProbability );
512
513	if( allAreSeeds && tr_torrentIsPrivate( tor ) )
514	tr_peerMgrMarkAllAsSeeds( tor );
515
516	break;
517	}
518
519	case TR_TRACKER_WARNING:
520	tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
521	tor->error = TR_STAT_TRACKER_WARNING;
522	tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
523	tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
524	break;
525
526	case TR_TRACKER_ERROR:
527	tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
528	tor->error = TR_STAT_TRACKER_ERROR;
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_CLEAR:
534	if( tor->error != TR_STAT_LOCAL_ERROR )
535	tr_torrentClearError( tor );
536	break;
537	}
538	}
539
540	/***
541	****
542	**** TORRENT INSTANTIATION
543	****
544	***/
545
546	static tr_piece_index_t
547	getBytePiece( const tr_info * info, uint64_t byteOffset )
548	{
549	assert( info );
550	assert( info->pieceSize != 0 );
551
552	return byteOffset / info->pieceSize;
553	}
554
555	static void
556	initFilePieces( tr_info * info,
557	tr_file_index_t fileIndex )
558	{
559	tr_file * file;
560	uint64_t firstByte, lastByte;
561
562	assert( info );
563	assert( fileIndex < info->fileCount );
564
565	file = &info->files[fileIndex];
566	firstByte = file->offset;
567	lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
568	file->firstPiece = getBytePiece( info, firstByte );
569	file->lastPiece = getBytePiece( info, lastByte );
570	}
571
572	static int
573	pieceHasFile( tr_piece_index_t piece,
574	const tr_file * file )
575	{
576	return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
577	}
578
579	static tr_priority_t
580	calculatePiecePriority( const tr_torrent * tor,
581	tr_piece_index_t piece,
582	int fileHint )
583	{
584	tr_file_index_t i;
585	tr_priority_t priority = TR_PRI_LOW;
586
587	/* find the first file that has data in this piece */
588	if( fileHint >= 0 ) {
589	i = fileHint;
590	while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
591	--i;
592	} else {
593	for( i = 0; i < tor->info.fileCount; ++i )
594	if( pieceHasFile( piece, &tor->info.files[i] ) )
595	break;
596	}
597
598	/* the piece's priority is the max of the priorities
599	* of all the files in that piece */
600	for( ; i < tor->info.fileCount; ++i )
601	{
602	const tr_file * file = &tor->info.files[i];
603
604	if( !pieceHasFile( piece, file ) )
605	break;
606
607	priority = MAX( priority, file->priority );
608
609	/* when dealing with multimedia files, getting the first and
610	last pieces can sometimes allow you to preview it a bit
611	before it's fully downloaded... */
612	if( file->priority >= TR_PRI_NORMAL )
613	if( file->firstPiece == piece \|\| file->lastPiece == piece )
614	priority = TR_PRI_HIGH;
615	}
616
617	return priority;
618	}
619
620	static void
621	tr_torrentInitFilePieces( tr_torrent * tor )
622	{
623	int * firstFiles;
624	tr_file_index_t f;
625	tr_piece_index_t p;
626	uint64_t offset = 0;
627	tr_info * inf = &tor->info;
628
629	/* assign the file offsets */
630	for( f=0; f<inf->fileCount; ++f ) {
631	inf->files[f].offset = offset;
632	offset += inf->files[f].length;
633	initFilePieces( inf, f );
634	}
635
636	/* build the array of first-file hints to give calculatePiecePriority */
637	firstFiles = tr_new( int, inf->pieceCount );
638	for( p=f=0; p<inf->pieceCount; ++p ) {
639	while( inf->files[f].lastPiece < p )
640	++f;
641	firstFiles[p] = f;
642	}
643
644	#if 0
645	/* test to confirm the first-file hints are correct */
646	for( p=0; p<inf->pieceCount; ++p ) {
647	f = firstFiles[p];
648	assert( inf->files[f].firstPiece <= p );
649	assert( inf->files[f].lastPiece >= p );
650	if( f > 0 )
651	assert( inf->files[f-1].lastPiece < p );
652	for( f=0; f<inf->fileCount; ++f )
653	if( pieceHasFile( p, &inf->files[f] ) )
654	break;
655	assert( (int)f == firstFiles[p] );
656	}
657	#endif
658
659	for( p=0; p<inf->pieceCount; ++p )
660	inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
661
662	tr_free( firstFiles );
663	}
664
665	static void torrentStart( tr_torrent * tor );
666
667	/**
668	* Decide on a block size. Constraints:
669	* (1) most clients decline requests over 16 KiB
670	* (2) pieceSize must be a multiple of block size
671	*/
672	uint32_t
673	tr_getBlockSize( uint32_t pieceSize )
674	{
675	uint32_t b = pieceSize;
676
677	while( b > MAX_BLOCK_SIZE )
678	b /= 2u;
679
680	if( !b \|\| ( pieceSize % b ) ) /* not cleanly divisible */
681	return 0;
682	return b;
683	}
684
685	static void refreshCurrentDir( tr_torrent * tor );
686
687	static void
688	torrentInitFromInfo( tr_torrent * tor )
689	{
690	uint64_t t;
691	tr_info * info = &tor->info;
692
693	tor->blockSize = tr_getBlockSize( info->pieceSize );
694
695	if( info->pieceSize )
696	tor->lastPieceSize = (uint32_t)(info->totalSize % info->pieceSize);
697
698	if( !tor->lastPieceSize )
699	tor->lastPieceSize = info->pieceSize;
700
701	if( tor->blockSize )
702	tor->lastBlockSize = info->totalSize % tor->blockSize;
703
704	if( !tor->lastBlockSize )
705	tor->lastBlockSize = tor->blockSize;
706
707	tor->blockCount = tor->blockSize
708	? ( info->totalSize + tor->blockSize - 1 ) / tor->blockSize
709	: 0;
710
711	tor->blockCountInPiece = tor->blockSize
712	? info->pieceSize / tor->blockSize
713	: 0;
714
715	tor->blockCountInLastPiece = tor->blockSize
716	? ( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize
717	: 0;
718
719	/* check our work */
720	if( tor->blockSize != 0 )
721	assert( ( info->pieceSize % tor->blockSize ) == 0 );
722	t = info->pieceCount - 1;
723	t *= info->pieceSize;
724	t += tor->lastPieceSize;
725	assert( t == info->totalSize );
726	t = tor->blockCount - 1;
727	t *= tor->blockSize;
728	t += tor->lastBlockSize;
729	assert( t == info->totalSize );
730	t = info->pieceCount - 1;
731	t *= tor->blockCountInPiece;
732	t += tor->blockCountInLastPiece;
733	assert( t == (uint64_t)tor->blockCount );
734
735	tr_cpConstruct( &tor->completion, tor );
736
737	tr_torrentInitFilePieces( tor );
738
739	tor->completeness = tr_cpGetStatus( &tor->completion );
740	}
741
742	static void tr_torrentFireMetadataCompleted( tr_torrent * tor );
743
744	void
745	tr_torrentGotNewInfoDict( tr_torrent * tor )
746	{
747	torrentInitFromInfo( tor );
748
749	tr_torrentFireMetadataCompleted( tor );
750	}
751
752	static tr_bool
753	hasAnyLocalData( const tr_torrent * tor )
754	{
755	tr_file_index_t i;
756	tr_bool has_local_data = FALSE;
757	const tr_file_index_t n = tor->info.fileCount;
758
759	for( i=0; i<n && !has_local_data; ++i )
760	{
761	struct stat sb;
762	char * filename = tr_torrentFindFile( tor, i );
763
764	if( filename && !stat( filename, &sb ) )
765	has_local_data = TRUE;
766
767	tr_free( filename );
768	}
769
770	return has_local_data;
771	}
772
773	static tr_bool
774	setLocalErrorIfFilesDisappeared( tr_torrent * tor )
775	{
776	const tr_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
787	static void
788	torrentInit( tr_torrent * tor, const tr_ctor * ctor )
789	{
790	int doStart;
791	uint64_t loaded;
792	const char * dir;
793	tr_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
806	tr_sha1( tor->obfuscatedHash, "req2", 4,
807	tor->info.hash, SHA_DIGEST_LENGTH,
808	NULL );
809
810	if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) \|\|
811	!tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
812	tor->downloadDir = tr_strdup( dir );
813
814	if( tr_ctorGetIncompleteDir( ctor, &dir ) )
815	dir = tr_sessionGetIncompleteDir( session );
816	if( tr_sessionIsIncompleteDirEnabled( session ) )
817	tor->incompleteDir = tr_strdup( dir );
818
819	tor->bandwidth = tr_bandwidthNew( session, session->bandwidth );
820
821	tor->bandwidth->priority = tr_ctorGetBandwidthPriority( ctor );
822
823	tor->error = TR_STAT_OK;
824
825	tor->finishedSeedingByIdle = FALSE;
826
827	tr_peerMgrAddTorrent( session->peerMgr, tor );
828
829	assert( !tor->downloadedCur );
830	assert( !tor->uploadedCur );
831
832	tr_torrentSetAddedDate( tor, tr_time( ) ); /* this is a default value to be
833	overwritten by the resume file */
834
835	torrentInitFromInfo( tor );
836	loaded = tr_torrentLoadResume( tor, ~0, ctor );
837	tor->completeness = tr_cpGetStatus( &tor->completion );
838	setLocalErrorIfFilesDisappeared( tor );
839
840	tr_ctorInitTorrentPriorities( ctor, tor );
841	tr_ctorInitTorrentWanted( ctor, tor );
842
843	refreshCurrentDir( tor );
844
845	doStart = tor->isRunning;
846	tor->isRunning = 0;
847
848	if( !( loaded & TR_FR_SPEEDLIMIT ) )
849	{
850	tr_torrentUseSpeedLimit( tor, TR_UP, FALSE );
851	tr_torrentSetSpeedLimit_Bps( tor, TR_UP, tr_sessionGetSpeedLimit_Bps( tor->session, TR_UP ) );
852	tr_torrentUseSpeedLimit( tor, TR_DOWN, FALSE );
853	tr_torrentSetSpeedLimit_Bps( tor, TR_DOWN, tr_sessionGetSpeedLimit_Bps( tor->session, TR_DOWN ) );
854	tr_torrentUseSessionLimits( tor, TRUE );
855	}
856
857	if( !( loaded & TR_FR_RATIOLIMIT ) )
858	{
859	tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
860	tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
861	}
862
863	if( !( loaded & TR_FR_IDLELIMIT ) )
864	{
865	tr_torrentSetIdleMode( tor, TR_IDLELIMIT_GLOBAL );
866	tr_torrentSetIdleLimit( tor, tr_sessionGetIdleLimit( tor->session ) );
867	}
868
869	{
870	tr_torrent * it = NULL;
871	tr_torrent * last = NULL;
872	while( ( it = tr_torrentNext( session, it ) ) )
873	last = it;
874
875	if( !last )
876	session->torrentList = tor;
877	else
878	last->next = tor;
879	++session->torrentCount;
880	}
881
882	/* if we don't have a local .torrent file already, assume the torrent is new */
883	isNewTorrent = stat( tor->info.torrent, &st );
884
885	/* maybe save our own copy of the metainfo */
886	if( tr_ctorGetSave( ctor ) )
887	{
888	const tr_benc * val;
889	if( !tr_ctorGetMetainfo( ctor, &val ) )
890	{
891	const char * path = tor->info.torrent;
892	const int err = tr_bencToFile( val, TR_FMT_BENC, path );
893	if( err )
894	tr_torrentSetLocalError( tor, "Unable to save torrent file: %s", tr_strerror( err ) );
895	tr_sessionSetTorrentFile( tor->session, tor->info.hashString, path );
896	}
897	}
898
899	tor->tiers = tr_announcerAddTorrent( tor->session->announcer, tor, onTrackerResponse, NULL );
900
901	if( isNewTorrent )
902	{
903	tor->startAfterVerify = doStart;
904	tr_torrentVerify( tor );
905	}
906	else if( doStart )
907	{
908	torrentStart( tor );
909	}
910
911	tr_sessionUnlock( session );
912	}
913
914	static tr_parse_result
915	torrentParseImpl( const tr_ctor * ctor, tr_info * setmeInfo,
916	tr_bool * setmeHasInfo, int * dictLength )
917	{
918	int doFree;
919	tr_bool didParse;
920	tr_bool hasInfo = FALSE;
921	tr_info tmp;
922	const tr_benc * metainfo;
923	tr_session * session = tr_ctorGetSession( ctor );
924	tr_parse_result result = TR_PARSE_OK;
925
926	if( setmeInfo == NULL )
927	setmeInfo = &tmp;
928	memset( setmeInfo, 0, sizeof( tr_info ) );
929
930	if( tr_ctorGetMetainfo( ctor, &metainfo ) )
931	return TR_PARSE_ERR;
932
933	didParse = tr_metainfoParse( session, metainfo, setmeInfo,
934	&hasInfo, dictLength );
935	doFree = didParse && ( setmeInfo == &tmp );
936
937	if( !didParse )
938	result = TR_PARSE_ERR;
939
940	if( didParse && hasInfo && !tr_getBlockSize( setmeInfo->pieceSize ) )
941	result = TR_PARSE_ERR;
942
943	if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
944	result = TR_PARSE_DUPLICATE;
945
946	if( doFree )
947	tr_metainfoFree( setmeInfo );
948
949	if( setmeHasInfo != NULL )
950	*setmeHasInfo = hasInfo;
951
952	return result;
953	}
954
955	tr_parse_result
956	tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
957	{
958	return torrentParseImpl( ctor, setmeInfo, NULL, NULL );
959	}
960
961	tr_torrent *
962	tr_torrentNew( const tr_ctor * ctor, int * setmeError )
963	{
964	int len;
965	tr_bool hasInfo;
966	tr_info tmpInfo;
967	tr_parse_result r;
968	tr_torrent * tor = NULL;
969
970	assert( ctor != NULL );
971	assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
972
973	r = torrentParseImpl( ctor, &tmpInfo, &hasInfo, &len );
974	if( r == TR_PARSE_OK )
975	{
976	tor = tr_new0( tr_torrent, 1 );
977	tor->info = tmpInfo;
978	if( hasInfo )
979	tor->infoDictLength = len;
980	torrentInit( tor, ctor );
981	}
982	else
983	{
984	if( r == TR_PARSE_DUPLICATE )
985	tr_metainfoFree( &tmpInfo );
986
987	if( setmeError )
988	*setmeError = r;
989	}
990
991	return tor;
992	}
993
994	/**
995	***
996	**/
997
998	void
999	tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
1000	{
1001	assert( tr_isTorrent( tor ) );
1002
1003	if( !path \|\| !tor->downloadDir \|\| strcmp( path, tor->downloadDir ) )
1004	{
1005	tr_free( tor->downloadDir );
1006	tor->downloadDir = tr_strdup( path );
1007	tr_torrentSetDirty( tor );
1008	}
1009
1010	refreshCurrentDir( tor );
1011	}
1012
1013	const char*
1014	tr_torrentGetDownloadDir( const tr_torrent * tor )
1015	{
1016	assert( tr_isTorrent( tor ) );
1017
1018	return tor->downloadDir;
1019	}
1020
1021	const char *
1022	tr_torrentGetCurrentDir( const tr_torrent * tor )
1023	{
1024	assert( tr_isTorrent( tor ) );
1025
1026	return tor->currentDir;
1027	}
1028
1029
1030	void
1031	tr_torrentChangeMyPort( tr_torrent * tor )
1032	{
1033	assert( tr_isTorrent( tor ) );
1034
1035	if( tor->isRunning )
1036	tr_announcerChangeMyPort( tor );
1037	}
1038
1039	static inline void
1040	tr_torrentManualUpdateImpl( void * vtor )
1041	{
1042	tr_torrent * tor = vtor;
1043
1044	assert( tr_isTorrent( tor ) );
1045
1046	if( tor->isRunning )
1047	tr_announcerManualAnnounce( tor );
1048	}
1049
1050	void
1051	tr_torrentManualUpdate( tr_torrent * tor )
1052	{
1053	assert( tr_isTorrent( tor ) );
1054
1055	tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
1056	}
1057
1058	tr_bool
1059	tr_torrentCanManualUpdate( const tr_torrent * tor )
1060	{
1061	return ( tr_isTorrent( tor ) )
1062	&& ( tor->isRunning )
1063	&& ( tr_announcerCanManualAnnounce( tor ) );
1064	}
1065
1066	const tr_info *
1067	tr_torrentInfo( const tr_torrent * tor )
1068	{
1069	return tr_isTorrent( tor ) ? &tor->info : NULL;
1070	}
1071
1072	const tr_stat *
1073	tr_torrentStatCached( tr_torrent * tor )
1074	{
1075	const time_t now = tr_time( );
1076
1077	return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
1078	? &tor->stats
1079	: tr_torrentStat( tor );
1080	}
1081
1082	void
1083	tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
1084	{
1085	assert( tr_isTorrent( tor ) );
1086	assert( state==TR_VERIFY_NONE \|\| state==TR_VERIFY_WAIT \|\| state==TR_VERIFY_NOW );
1087
1088	tor->verifyState = state;
1089	tor->anyDate = tr_time( );
1090	}
1091
1092	tr_torrent_activity
1093	tr_torrentGetActivity( tr_torrent * tor )
1094	{
1095	assert( tr_isTorrent( tor ) );
1096
1097	tr_torrentRecheckCompleteness( tor );
1098
1099	if( tor->verifyState == TR_VERIFY_NOW )
1100	return TR_STATUS_CHECK;
1101	if( tor->verifyState == TR_VERIFY_WAIT )
1102	return TR_STATUS_CHECK_WAIT;
1103	if( !tor->isRunning )
1104	return TR_STATUS_STOPPED;
1105	if( tor->completeness == TR_LEECH )
1106	return TR_STATUS_DOWNLOAD;
1107
1108	return TR_STATUS_SEED;
1109	}
1110
1111	static double
1112	getVerifyProgress( const tr_torrent * tor )
1113	{
1114	tr_piece_index_t i, n;
1115	tr_piece_index_t checked = 0;
1116
1117	assert( tr_isTorrent( tor ) );
1118
1119	for( i=0, n=tor->info.pieceCount; i!=n; ++i )
1120	if( tor->info.pieces[i].timeChecked )
1121	++checked;
1122
1123	return checked / (double)tor->info.pieceCount;
1124	}
1125
1126	const tr_stat *
1127	tr_torrentStat( tr_torrent * tor )
1128	{
1129	tr_stat * s;
1130	int usableSeeds;
1131	uint64_t now;
1132	double d;
1133	uint64_t seedRatioBytesLeft;
1134	uint64_t seedRatioBytesGoal;
1135	tr_bool seedRatioApplies;
1136	uint16_t seedIdleMinutes;
1137
1138	if( !tor )
1139	return NULL;
1140
1141	assert( tr_isTorrent( tor ) );
1142	tr_torrentLock( tor );
1143
1144	tor->lastStatTime = tr_time( );
1145
1146	s = &tor->stats;
1147	s->id = tor->uniqueId;
1148	s->activity = tr_torrentGetActivity( tor );
1149	s->error = tor->error;
1150	memcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
1151
1152	s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
1153
1154	tr_peerMgrTorrentStats( tor,
1155	&s->peersKnown,
1156	&s->peersConnected,
1157	&usableSeeds,
1158	&s->webseedsSendingToUs,
1159	&s->peersSendingToUs,
1160	&s->peersGettingFromUs,
1161	s->peersFrom );
1162
1163	now = tr_time_msec( );
1164	d = tr_peerMgrGetWebseedSpeed_Bps( tor, now );
1165	s->rawUploadSpeed_KBps = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps ( tor->bandwidth, now, TR_UP ) );
1166	s->pieceUploadSpeed_KBps = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( tor->bandwidth, now, TR_UP ) );
1167	s->rawDownloadSpeed_KBps = toSpeedKBps( d + tr_bandwidthGetRawSpeed_Bps ( tor->bandwidth, now, TR_DOWN ) );
1168	s->pieceDownloadSpeed_KBps = toSpeedKBps( d + tr_bandwidthGetPieceSpeed_Bps( tor->bandwidth, now, TR_DOWN ) );
1169
1170	usableSeeds += tor->info.webseedCount;
1171
1172	s->percentComplete = tr_cpPercentComplete ( &tor->completion );
1173	s->metadataPercentComplete = tr_torrentGetMetadataPercent( tor );
1174
1175	s->percentDone = tr_cpPercentDone ( &tor->completion );
1176	s->leftUntilDone = tr_cpLeftUntilDone( &tor->completion );
1177	s->sizeWhenDone = tr_cpSizeWhenDone ( &tor->completion );
1178	s->recheckProgress = s->activity == TR_STATUS_CHECK ? getVerifyProgress( tor ) : 0;
1179	s->activityDate = tor->activityDate;
1180	s->addedDate = tor->addedDate;
1181	s->doneDate = tor->doneDate;
1182	s->startDate = tor->startDate;
1183	s->secondsSeeding = tor->secondsSeeding;
1184	s->secondsDownloading = tor->secondsDownloading;
1185
1186	if ((s->activity == TR_STATUS_DOWNLOAD \|\| s->activity == TR_STATUS_SEED) && s->startDate != 0)
1187	s->idleSecs = difftime(tr_time(), MAX(s->startDate, s->activityDate));
1188	else
1189	s->idleSecs = -1;
1190
1191	s->corruptEver = tor->corruptCur + tor->corruptPrev;
1192	s->downloadedEver = tor->downloadedCur + tor->downloadedPrev;
1193	s->uploadedEver = tor->uploadedCur + tor->uploadedPrev;
1194	s->haveValid = tr_cpHaveValid( &tor->completion );
1195	s->haveUnchecked = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
1196
1197	if( usableSeeds > 0 )
1198	{
1199	s->desiredAvailable = s->leftUntilDone;
1200	}
1201	else if( !s->leftUntilDone \|\| !s->peersConnected )
1202	{
1203	s->desiredAvailable = 0;
1204	}
1205	else
1206	{
1207	tr_piece_index_t i;
1208	tr_bitfield * peerPieces = tr_peerMgrGetAvailable( tor );
1209	s->desiredAvailable = 0;
1210	for( i = 0; i < tor->info.pieceCount; ++i )
1211	if( !tor->info.pieces[i].dnd && tr_bitfieldHasFast( peerPieces, i ) )
1212	s->desiredAvailable += tr_cpMissingBlocksInPiece( &tor->completion, i );
1213	s->desiredAvailable *= tor->blockSize;
1214	tr_bitfieldFree( peerPieces );
1215	}
1216
1217	s->ratio = tr_getRatio( s->uploadedEver,
1218	s->downloadedEver ? s->downloadedEver : s->haveValid );
1219
1220	seedRatioApplies = tr_torrentGetSeedRatioBytes( tor, &seedRatioBytesLeft,
1221	&seedRatioBytesGoal );
1222
1223	switch( s->activity )
1224	{
1225	/* etaXLSpeed exists because if we use the piece speed directly,
1226	* brief fluctuations cause the ETA to jump all over the place.
1227	* so, etaXLSpeed is a smoothed-out version of the piece speed
1228	* to dampen the effect of fluctuations */
1229
1230	case TR_STATUS_DOWNLOAD:
1231	if( ( tor->etaDLSpeedCalculatedAt + 800 ) < now ) {
1232	tor->etaDLSpeed_KBps = ( ( tor->etaDLSpeedCalculatedAt + 4000 ) < now )
1233	? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
1234	: ((tor->etaDLSpeed_KBps4.0) + s->pieceDownloadSpeed_KBps)/5.0; / smooth across 5 readings */
1235	tor->etaDLSpeedCalculatedAt = now;
1236	}
1237
1238	if( s->leftUntilDone > s->desiredAvailable )
1239	s->eta = TR_ETA_NOT_AVAIL;
1240	else if( tor->etaDLSpeed_KBps < 1 )
1241	s->eta = TR_ETA_UNKNOWN;
1242	else
1243	s->eta = s->leftUntilDone / toSpeedBytes(tor->etaDLSpeed_KBps);
1244
1245	s->etaIdle = TR_ETA_NOT_AVAIL;
1246	break;
1247
1248	case TR_STATUS_SEED: {
1249	if( !seedRatioApplies )
1250	s->eta = TR_ETA_NOT_AVAIL;
1251	else {
1252	if( ( tor->etaULSpeedCalculatedAt + 800 ) < now ) {
1253	tor->etaULSpeed_KBps = ( ( tor->etaULSpeedCalculatedAt + 4000 ) < now )
1254	? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
1255	: ((tor->etaULSpeed_KBps4.0) + s->pieceUploadSpeed_KBps)/5.0; / smooth across 5 readings */
1256	tor->etaULSpeedCalculatedAt = now;
1257	}
1258	if( tor->etaULSpeed_KBps < 1 )
1259	s->eta = TR_ETA_UNKNOWN;
1260	else
1261	s->eta = seedRatioBytesLeft / toSpeedBytes(tor->etaULSpeed_KBps);
1262	}
1263
1264	if( tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle( tor, &seedIdleMinutes ) )
1265	s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
1266	else
1267	s->etaIdle = TR_ETA_NOT_AVAIL;
1268	break;
1269	}
1270
1271	default:
1272	s->eta = TR_ETA_NOT_AVAIL;
1273	s->etaIdle = TR_ETA_NOT_AVAIL;
1274	break;
1275	}
1276
1277	/* s->haveValid is here to make sure a torrent isn't marked 'finished'
1278	* when the user hits "uncheck all" prior to starting the torrent... */
1279	s->finished = tor->finishedSeedingByIdle \|\| (seedRatioApplies && !seedRatioBytesLeft && s->haveValid);
1280
1281	if( !seedRatioApplies \|\| s->finished )
1282	s->seedRatioPercentDone = 1;
1283	else if( !seedRatioBytesGoal ) /* impossible? safeguard for div by zero */
1284	s->seedRatioPercentDone = 0;
1285	else
1286	s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
1287
1288	tr_torrentUnlock( tor );
1289
1290	return s;
1291	}
1292
1293	/***
1294	****
1295	***/
1296
1297	static uint64_t
1298	fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1299	{
1300	uint64_t total = 0;
1301	const tr_file * f = &tor->info.files[index];
1302
1303	if( f->length )
1304	{
1305	const tr_block_index_t firstBlock = f->offset / tor->blockSize;
1306	const uint64_t lastByte = f->offset + f->length - 1;
1307	const tr_block_index_t lastBlock = lastByte / tor->blockSize;
1308
1309	if( firstBlock == lastBlock )
1310	{
1311	if( tr_cpBlockIsCompleteFast( &tor->completion, firstBlock ) )
1312	total = f->length;
1313	}
1314	else
1315	{
1316	tr_block_index_t i;
1317
1318	/* the first block */
1319	if( tr_cpBlockIsCompleteFast( &tor->completion, firstBlock ) )
1320	total += tor->blockSize - ( f->offset % tor->blockSize );
1321
1322	/* the middle blocks */
1323	if( f->firstPiece == f->lastPiece )
1324	{
1325	for( i=firstBlock+1; i<lastBlock; ++i )
1326	if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1327	total += tor->blockSize;
1328	}
1329	else
1330	{
1331	uint64_t b = 0;
1332	const tr_block_index_t firstBlockOfLastPiece
1333	= tr_torPieceFirstBlock( tor, f->lastPiece );
1334	const tr_block_index_t lastBlockOfFirstPiece
1335	= tr_torPieceFirstBlock( tor, f->firstPiece )
1336	+ tr_torPieceCountBlocks( tor, f->firstPiece ) - 1;
1337
1338	/* the rest of the first piece */
1339	for( i=firstBlock+1; i<lastBlock && i<=lastBlockOfFirstPiece; ++i )
1340	if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1341	++b;
1342
1343	/* the middle pieces */
1344	if( f->firstPiece + 1 < f->lastPiece )
1345	for( i=f->firstPiece+1; i<f->lastPiece; ++i )
1346	b += tor->blockCountInPiece - tr_cpMissingBlocksInPiece( &tor->completion, i );
1347
1348	/* the rest of the last piece */
1349	for( i=firstBlockOfLastPiece; i<lastBlock; ++i )
1350	if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1351	++b;
1352
1353	b *= tor->blockSize;
1354	total += b;
1355	}
1356
1357	/* the last block */
1358	if( tr_cpBlockIsCompleteFast( &tor->completion, lastBlock ) )
1359	total += ( f->offset + f->length ) - ( (uint64_t)tor->blockSize * lastBlock );
1360	}
1361	}
1362
1363	return total;
1364	}
1365
1366	tr_file_stat *
1367	tr_torrentFiles( const tr_torrent * tor,
1368	tr_file_index_t * fileCount )
1369	{
1370	tr_file_index_t i;
1371	const tr_file_index_t n = tor->info.fileCount;
1372	tr_file_stat * files = tr_new0( tr_file_stat, n );
1373	tr_file_stat * walk = files;
1374	const tr_bool isSeed = tor->completeness == TR_SEED;
1375
1376	assert( tr_isTorrent( tor ) );
1377
1378	for( i=0; i<n; ++i, ++walk ) {
1379	const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1380	walk->bytesCompleted = b;
1381	walk->progress = tor->info.files[i].length > 0 ? ( (float)b / tor->info.files[i].length ) : 1.0f;
1382	}
1383
1384	if( fileCount )
1385	*fileCount = n;
1386
1387	return files;
1388	}
1389
1390	void
1391	tr_torrentFilesFree( tr_file_stat * files,
1392	tr_file_index_t fileCount UNUSED )
1393	{
1394	tr_free( files );
1395	}
1396
1397	/***
1398	****
1399	***/
1400
1401	double*
1402	tr_torrentWebSpeeds_KBps( const tr_torrent * tor )
1403	{
1404	double * ret = NULL;
1405
1406	if( tr_isTorrent( tor ) )
1407	{
1408	tr_torrentLock( tor );
1409	ret = tr_peerMgrWebSpeeds_KBps( tor );
1410	tr_torrentUnlock( tor );
1411	}
1412
1413	return ret;
1414	}
1415
1416	tr_peer_stat *
1417	tr_torrentPeers( const tr_torrent * tor, int * peerCount )
1418	{
1419	tr_peer_stat * ret = NULL;
1420
1421	if( tr_isTorrent( tor ) )
1422	{
1423	tr_torrentLock( tor );
1424	ret = tr_peerMgrPeerStats( tor, peerCount );
1425	tr_torrentUnlock( tor );
1426	}
1427
1428	return ret;
1429	}
1430
1431	void
1432	tr_torrentPeersFree( tr_peer_stat * peers, int peerCount UNUSED )
1433	{
1434	tr_free( peers );
1435	}
1436
1437	tr_tracker_stat *
1438	tr_torrentTrackers( const tr_torrent * torrent, int * setmeTrackerCount )
1439	{
1440	tr_tracker_stat * ret = NULL;
1441
1442	if( tr_isTorrent( torrent ) )
1443	{
1444	tr_torrentLock( torrent );
1445	ret = tr_announcerStats( torrent, setmeTrackerCount );
1446	tr_torrentUnlock( torrent );
1447	}
1448
1449	return ret;
1450	}
1451
1452	void
1453	tr_torrentTrackersFree( tr_tracker_stat * trackers, int trackerCount )
1454	{
1455	tr_announcerStatsFree( trackers, trackerCount );
1456	}
1457
1458	void
1459	tr_torrentAvailability( const tr_torrent * tor, int8_t * tab, int size )
1460	{
1461	if( tr_isTorrent( tor ) && ( tab != NULL ) && ( size > 0 ) )
1462	{
1463	tr_torrentLock( tor );
1464	tr_peerMgrTorrentAvailability( tor, tab, size );
1465	tr_torrentUnlock( tor );
1466	}
1467	}
1468
1469	void
1470	tr_torrentAmountFinished( const tr_torrent * tor,
1471	float * tab,
1472	int size )
1473	{
1474	assert( tr_isTorrent( tor ) );
1475
1476	tr_torrentLock( tor );
1477	tr_cpGetAmountDone( &tor->completion, tab, size );
1478	tr_torrentUnlock( tor );
1479	}
1480
1481	static void
1482	tr_torrentResetTransferStats( tr_torrent * tor )
1483	{
1484	assert( tr_isTorrent( tor ) );
1485
1486	tr_torrentLock( tor );
1487
1488	tor->downloadedPrev += tor->downloadedCur;
1489	tor->downloadedCur = 0;
1490	tor->uploadedPrev += tor->uploadedCur;
1491	tor->uploadedCur = 0;
1492	tor->corruptPrev += tor->corruptCur;
1493	tor->corruptCur = 0;
1494
1495	tr_torrentSetDirty( tor );
1496
1497	tr_torrentUnlock( tor );
1498	}
1499
1500	void
1501	tr_torrentSetHasPiece( tr_torrent * tor,
1502	tr_piece_index_t pieceIndex,
1503	tr_bool has )
1504	{
1505	assert( tr_isTorrent( tor ) );
1506	assert( pieceIndex < tor->info.pieceCount );
1507
1508	if( has )
1509	tr_cpPieceAdd( &tor->completion, pieceIndex );
1510	else
1511	tr_cpPieceRem( &tor->completion, pieceIndex );
1512	}
1513
1514	/***
1515	****
1516	***/
1517
1518	static void
1519	freeTorrent( tr_torrent * tor )
1520	{
1521	tr_torrent * t;
1522	tr_session * session = tor->session;
1523	tr_info * inf = &tor->info;
1524
1525	assert( tr_isTorrent( tor ) );
1526	assert( !tor->isRunning );
1527
1528	tr_sessionLock( session );
1529
1530	tr_peerMgrRemoveTorrent( tor );
1531
1532	tr_cpDestruct( &tor->completion );
1533
1534	tr_announcerRemoveTorrent( session->announcer, tor );
1535
1536	tr_free( tor->downloadDir );
1537	tr_free( tor->incompleteDir );
1538	tr_free( tor->peer_id );
1539
1540	if( tor == session->torrentList )
1541	session->torrentList = tor->next;
1542	else for( t = session->torrentList; t != NULL; t = t->next ) {
1543	if( t->next == tor ) {
1544	t->next = tor->next;
1545	break;
1546	}
1547	}
1548
1549	assert( session->torrentCount >= 1 );
1550	session->torrentCount--;
1551
1552	tr_bandwidthFree( tor->bandwidth );
1553
1554	tr_metainfoFree( inf );
1555	tr_free( tor );
1556
1557	tr_sessionUnlock( session );
1558	}
1559
1560	/**
1561	*** Start/Stop Callback
1562	**/
1563
1564	static void
1565	torrentStartImpl( void * vtor )
1566	{
1567	time_t now;
1568	tr_torrent * tor = vtor;
1569
1570	assert( tr_isTorrent( tor ) );
1571
1572	tr_sessionLock( tor->session );
1573
1574	tr_torrentRecheckCompleteness( tor );
1575
1576	now = tr_time( );
1577	tor->isRunning = TRUE;
1578	tor->completeness = tr_cpGetStatus( &tor->completion );
1579	tor->startDate = tor->anyDate = now;
1580	tr_torrentClearError( tor );
1581	tor->finishedSeedingByIdle = FALSE;
1582
1583	tr_torrentResetTransferStats( tor );
1584	tr_announcerTorrentStarted( tor );
1585	tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1586	tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt( 20 );
1587	tor->lpdAnnounceAt = now;
1588	tr_peerMgrStartTorrent( tor );
1589
1590	tr_sessionUnlock( tor->session );
1591	}
1592
1593	uint64_t
1594	tr_torrentGetCurrentSizeOnDisk( const tr_torrent * tor )
1595	{
1596	tr_file_index_t i;
1597	uint64_t byte_count = 0;
1598	const tr_file_index_t n = tor->info.fileCount;
1599
1600	for( i=0; i<n; ++i )
1601	{
1602	struct stat sb;
1603	char * filename = tr_torrentFindFile( tor, i );
1604
1605	sb.st_size = 0;
1606	if( filename && !stat( filename, &sb ) )
1607	byte_count += sb.st_size;
1608
1609	tr_free( filename );
1610	}
1611
1612	return byte_count;
1613	}
1614
1615	static void
1616	torrentStart( tr_torrent * tor )
1617	{
1618	assert( tr_isTorrent( tor ) );
1619
1620	/* already running... */
1621	if( tor->isRunning )
1622	return;
1623
1624	/* don't allow the torrent to be started if the files disappeared */
1625	if( setLocalErrorIfFilesDisappeared( tor ) )
1626	return;
1627
1628	/* verifying right now... wait until that's done so
1629	* we'll know what completeness to use/announce */
1630	if( tor->verifyState != TR_VERIFY_NONE ) {
1631	tor->startAfterVerify = TRUE;
1632	return;
1633	}
1634
1635	/* otherwise, start it now... */
1636	tr_sessionLock( tor->session );
1637
1638	/* allow finished torrents to be resumed */
1639	if( tr_torrentIsSeedRatioDone( tor ) ) {
1640	tr_torinf( tor, _( "Restarted manually -- disabling its seed ratio" ) );
1641	tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
1642	}
1643
1644	/* corresponds to the peer_id sent as a tracker request parameter.
1645	* one tracker admin says: "When the same torrent is opened and
1646	* closed and opened again without quitting Transmission ...
1647	* change the peerid. It would help sometimes if a stopped event
1648	* was missed to ensure that we didn't think someone was cheating. */
1649	tr_free( tor->peer_id );
1650	tor->peer_id = tr_peerIdNew( );
1651	tor->isRunning = 1;
1652	tr_torrentSetDirty( tor );
1653	tr_runInEventThread( tor->session, torrentStartImpl, tor );
1654
1655	tr_sessionUnlock( tor->session );
1656	}
1657
1658	void
1659	tr_torrentStart( tr_torrent * tor )
1660	{
1661	if( tr_isTorrent( tor ) )
1662	torrentStart( tor );
1663	}
1664
1665	static void
1666	torrentRecheckDoneImpl( void * vtor )
1667	{
1668	tr_torrent * tor = vtor;
1669	assert( tr_isTorrent( tor ) );
1670
1671	tr_torrentRecheckCompleteness( tor );
1672
1673	if( tor->startAfterVerify ) {
1674	tor->startAfterVerify = FALSE;
1675	torrentStart( tor );
1676	}
1677	}
1678
1679	static void
1680	torrentRecheckDoneCB( tr_torrent * tor )
1681	{
1682	assert( tr_isTorrent( tor ) );
1683
1684	tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1685	}
1686
1687	static void
1688	verifyTorrent( void * vtor )
1689	{
1690	tr_torrent * tor = vtor;
1691
1692	assert( tr_isTorrent( tor ) );
1693	tr_sessionLock( tor->session );
1694
1695	/* if the torrent's already being verified, stop it */
1696	tr_verifyRemove( tor );
1697
1698	/* if the torrent's running, stop it & set the restart-after-verify flag */
1699	if( tor->startAfterVerify \|\| tor->isRunning ) {
1700	/* don't clobber isStopping */
1701	const tr_bool startAfter = tor->isStopping ? FALSE : TRUE;
1702	tr_torrentStop( tor );
1703	tor->startAfterVerify = startAfter;
1704	}
1705
1706	if( setLocalErrorIfFilesDisappeared( tor ) )
1707	tor->startAfterVerify = FALSE;
1708	else
1709	tr_verifyAdd( tor, torrentRecheckDoneCB );
1710
1711	tr_sessionUnlock( tor->session );
1712	}
1713
1714	void
1715	tr_torrentVerify( tr_torrent * tor )
1716	{
1717	if( tr_isTorrent( tor ) )
1718	tr_runInEventThread( tor->session, verifyTorrent, tor );
1719	}
1720
1721	void
1722	tr_torrentSave( tr_torrent * tor )
1723	{
1724	assert( tr_isTorrent( tor ) );
1725
1726	if( tor->isDirty )
1727	{
1728	tor->isDirty = FALSE;
1729	tr_torrentSaveResume( tor );
1730	}
1731	}
1732
1733	static void
1734	stopTorrent( void * vtor )
1735	{
1736	tr_torrent * tor = vtor;
1737	tr_torinf( tor, "Pausing" );
1738
1739	assert( tr_isTorrent( tor ) );
1740
1741	tr_torrentLock( tor );
1742
1743	tr_verifyRemove( tor );
1744	tr_peerMgrStopTorrent( tor );
1745	tr_announcerTorrentStopped( tor );
1746	tr_cacheFlushTorrent( tor->session->cache, tor );
1747
1748	tr_fdTorrentClose( tor->session, tor->uniqueId );
1749
1750	if( !tor->isDeleting )
1751	tr_torrentSave( tor );
1752
1753	tr_torrentUnlock( tor );
1754	}
1755
1756	void
1757	tr_torrentStop( tr_torrent * tor )
1758	{
1759	assert( tr_isTorrent( tor ) );
1760
1761	if( tr_isTorrent( tor ) )
1762	{
1763	tr_sessionLock( tor->session );
1764
1765	tor->isRunning = 0;
1766	tor->isStopping = 0;
1767	tr_torrentSetDirty( tor );
1768	tr_runInEventThread( tor->session, stopTorrent, tor );
1769
1770	tr_sessionUnlock( tor->session );
1771	}
1772	}
1773
1774	static void
1775	closeTorrent( void * vtor )
1776	{
1777	tr_benc * d;
1778	tr_torrent * tor = vtor;
1779
1780	assert( tr_isTorrent( tor ) );
1781
1782	d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1783	tr_bencDictAddInt( d, "id", tor->uniqueId );
1784	tr_bencDictAddInt( d, "date", tr_time( ) );
1785
1786	tr_torinf( tor, "%s", _( "Removing torrent" ) );
1787
1788	stopTorrent( tor );
1789
1790	if( tor->isDeleting )
1791	{
1792	tr_metainfoRemoveSaved( tor->session, &tor->info );
1793	tr_torrentRemoveResume( tor );
1794	}
1795
1796	tor->isRunning = 0;
1797	freeTorrent( tor );
1798	}
1799
1800	void
1801	tr_torrentFree( tr_torrent * tor )
1802	{
1803	if( tr_isTorrent( tor ) )
1804	{
1805	tr_session * session = tor->session;
1806	assert( tr_isSession( session ) );
1807	tr_sessionLock( session );
1808
1809	tr_torrentClearCompletenessCallback( tor );
1810	tr_runInEventThread( session, closeTorrent, tor );
1811
1812	tr_sessionUnlock( session );
1813	}
1814	}
1815
1816	struct remove_data
1817	{
1818	tr_torrent * tor;
1819	tr_bool deleteFlag;
1820	tr_fileFunc * deleteFunc;
1821	};
1822
1823	static void tr_torrentDeleteLocalData( tr_torrent *, tr_fileFunc );
1824
1825	static void
1826	removeTorrent( void * vdata )
1827	{
1828	struct remove_data * data = vdata;
1829
1830	if( data->deleteFlag )
1831	tr_torrentDeleteLocalData( data->tor, data->deleteFunc );
1832
1833	tr_torrentClearCompletenessCallback( data->tor );
1834	closeTorrent( data->tor );
1835	tr_free( data );
1836	}
1837
1838	void
1839	tr_torrentRemove( tr_torrent * tor,
1840	tr_bool deleteFlag,
1841	tr_fileFunc deleteFunc )
1842	{
1843	struct remove_data * data;
1844
1845	assert( tr_isTorrent( tor ) );
1846	tor->isDeleting = 1;
1847
1848	data = tr_new0( struct remove_data, 1 );
1849	data->tor = tor;
1850	data->deleteFlag = deleteFlag;
1851	data->deleteFunc = deleteFunc;
1852	tr_runInEventThread( tor->session, removeTorrent, data );
1853	}
1854
1855	/**
1856	*** Completeness
1857	**/
1858
1859	static const char *
1860	getCompletionString( int type )
1861	{
1862	switch( type )
1863	{
1864	/* Translators: this is a minor point that's safe to skip over, but FYI:
1865	"Complete" and "Done" are specific, different terms in Transmission:
1866	"Complete" means we've downloaded every file in the torrent.
1867	"Done" means we're done downloading the files we wanted, but NOT all
1868	that exist */
1869	case TR_PARTIAL_SEED:
1870	return _( "Done" );
1871
1872	case TR_SEED:
1873	return _( "Complete" );
1874
1875	default:
1876	return _( "Incomplete" );
1877	}
1878	}
1879
1880	static void
1881	fireCompletenessChange( tr_torrent * tor,
1882	tr_completeness status,
1883	tr_bool wasRunning )
1884	{
1885	assert( tr_isTorrent( tor ) );
1886	assert( ( status == TR_LEECH )
1887	\|\| ( status == TR_SEED )
1888	\|\| ( status == TR_PARTIAL_SEED ) );
1889
1890	if( tor->completeness_func )
1891	tor->completeness_func( tor, status, wasRunning,
1892	tor->completeness_func_user_data );
1893	}
1894
1895	void
1896	tr_torrentSetCompletenessCallback( tr_torrent * tor,
1897	tr_torrent_completeness_func func,
1898	void * user_data )
1899	{
1900	assert( tr_isTorrent( tor ) );
1901
1902	tor->completeness_func = func;
1903	tor->completeness_func_user_data = user_data;
1904	}
1905
1906	void
1907	tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1908	{
1909	tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1910	}
1911
1912	void
1913	tr_torrentSetRatioLimitHitCallback( tr_torrent * tor,
1914	tr_torrent_ratio_limit_hit_func func,
1915	void * user_data )
1916	{
1917	assert( tr_isTorrent( tor ) );
1918
1919	tor->ratio_limit_hit_func = func;
1920	tor->ratio_limit_hit_func_user_data = user_data;
1921	}
1922
1923	void
1924	tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1925	{
1926	tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1927	}
1928
1929	void
1930	tr_torrentSetIdleLimitHitCallback( tr_torrent * tor,
1931	tr_torrent_idle_limit_hit_func func,
1932	void * user_data )
1933	{
1934	assert( tr_isTorrent( tor ) );
1935
1936	tor->idle_limit_hit_func = func;
1937	tor->idle_limit_hit_func_user_data = user_data;
1938	}
1939
1940	void
1941	tr_torrentClearIdleLimitHitCallback( tr_torrent * torrent )
1942	{
1943	tr_torrentSetIdleLimitHitCallback( torrent, NULL, NULL );
1944	}
1945
1946	static void
1947	onSigCHLD( int i UNUSED )
1948	{
1949	waitpid( -1, NULL, WNOHANG );
1950	}
1951
1952	static void
1953	torrentCallScript( const tr_torrent * tor, const char * script )
1954	{
1955	char timeStr[128];
1956	const time_t now = tr_time( );
1957
1958	assert( tr_isTorrent( tor ) );
1959
1960	tr_strlcpy( timeStr, ctime( &now ), sizeof( timeStr ) );
1961	*strchr( timeStr,'\n' ) = '\0';
1962
1963	if( script && *script )
1964	{
1965	int i;
1966	char * cmd[] = { tr_strdup( script ), NULL };
1967	char * env[] = {
1968	tr_strdup_printf( "TR_APP_VERSION=%s", SHORT_VERSION_STRING ),
1969	tr_strdup_printf( "TR_TIME_LOCALTIME=%s", timeStr ),
1970	tr_strdup_printf( "TR_TORRENT_DIR=%s", tor->currentDir ),
1971	tr_strdup_printf( "TR_TORRENT_ID=%d", tr_torrentId( tor ) ),
1972	tr_strdup_printf( "TR_TORRENT_HASH=%s", tor->info.hashString ),
1973	tr_strdup_printf( "TR_TORRENT_NAME=%s", tr_torrentName( tor ) ),
1974	NULL };
1975
1976	tr_torinf( tor, "Calling script \"%s\"", script );
1977
1978	#ifdef WIN32
1979	_spawnvpe( _P_NOWAIT, script, (const char*)cmd, env );
1980	#else
1981	signal( SIGCHLD, onSigCHLD );
1982
1983	if( !fork( ) )
1984	{
1985	execve( script, cmd, env );
1986	_exit( 0 );
1987	}
1988	#endif
1989
1990	for( i=0; cmd[i]; ++i ) tr_free( cmd[i] );
1991	for( i=0; env[i]; ++i ) tr_free( env[i] );
1992	}
1993	}
1994
1995	void
1996	tr_torrentRecheckCompleteness( tr_torrent * tor )
1997	{
1998	tr_completeness completeness;
1999
2000	assert( tr_isTorrent( tor ) );
2001
2002	tr_torrentLock( tor );
2003
2004	completeness = tr_cpGetStatus( &tor->completion );
2005
2006	if( completeness != tor->completeness )
2007	{
2008	const int recentChange = tor->downloadedCur != 0;
2009	const tr_bool wasLeeching = !tr_torrentIsSeed( tor );
2010	const tr_bool wasRunning = tor->isRunning;
2011
2012	if( recentChange )
2013	{
2014	tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
2015	getCompletionString( tor->completeness ),
2016	getCompletionString( completeness ) );
2017	}
2018
2019	tor->completeness = completeness;
2020	tr_fdTorrentClose( tor->session, tor->uniqueId );
2021
2022	if( tr_torrentIsSeed( tor ) )
2023	{
2024	if( recentChange )
2025	{
2026	tr_announcerTorrentCompleted( tor );
2027	tor->doneDate = tor->anyDate = tr_time( );
2028	}
2029
2030	if( wasLeeching && wasRunning )
2031	{
2032	/* clear interested flag on all peers */
2033	tr_peerMgrClearInterest( tor );
2034
2035	/* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
2036	tr_torrentCheckSeedLimit( tor );
2037	}
2038
2039	if( tor->currentDir == tor->incompleteDir )
2040	tr_torrentSetLocation( tor, tor->downloadDir, TRUE, NULL, NULL );
2041
2042	if( tr_sessionIsTorrentDoneScriptEnabled( tor->session ) )
2043	torrentCallScript( tor, tr_sessionGetTorrentDoneScript( tor->session ) );
2044	}
2045
2046	fireCompletenessChange( tor, wasRunning, completeness );
2047
2048	tr_torrentSetDirty( tor );
2049	}
2050
2051	tr_torrentUnlock( tor );
2052	}
2053
2054	/***
2055	****
2056	***/
2057
2058	static void
2059	tr_torrentFireMetadataCompleted( tr_torrent * tor )
2060	{
2061	assert( tr_isTorrent( tor ) );
2062
2063	if( tor->metadata_func )
2064	tor->metadata_func( tor, tor->metadata_func_user_data );
2065	}
2066
2067	void
2068	tr_torrentSetMetadataCallback( tr_torrent * tor,
2069	tr_torrent_metadata_func func,
2070	void * user_data )
2071	{
2072	assert( tr_isTorrent( tor ) );
2073
2074	tor->metadata_func = func;
2075	tor->metadata_func_user_data = user_data;
2076	}
2077
2078
2079	/**
2080	*** File priorities
2081	**/
2082
2083	void
2084	tr_torrentInitFilePriority( tr_torrent * tor,
2085	tr_file_index_t fileIndex,
2086	tr_priority_t priority )
2087	{
2088	tr_piece_index_t i;
2089	tr_file * file;
2090
2091	assert( tr_isTorrent( tor ) );
2092	assert( fileIndex < tor->info.fileCount );
2093	assert( tr_isPriority( priority ) );
2094
2095	file = &tor->info.files[fileIndex];
2096	file->priority = priority;
2097	for( i = file->firstPiece; i <= file->lastPiece; ++i )
2098	tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
2099	}
2100
2101	void
2102	tr_torrentSetFilePriorities( tr_torrent * tor,
2103	const tr_file_index_t * files,
2104	tr_file_index_t fileCount,
2105	tr_priority_t priority )
2106	{
2107	tr_file_index_t i;
2108	assert( tr_isTorrent( tor ) );
2109	tr_torrentLock( tor );
2110
2111	for( i = 0; i < fileCount; ++i )
2112	if( files[i] < tor->info.fileCount )
2113	tr_torrentInitFilePriority( tor, files[i], priority );
2114	tr_torrentSetDirty( tor );
2115	tr_peerMgrRebuildRequests( tor );
2116
2117	tr_torrentUnlock( tor );
2118	}
2119
2120	tr_priority_t*
2121	tr_torrentGetFilePriorities( const tr_torrent * tor )
2122	{
2123	tr_file_index_t i;
2124	tr_priority_t * p;
2125
2126	assert( tr_isTorrent( tor ) );
2127
2128	tr_torrentLock( tor );
2129	p = tr_new0( tr_priority_t, tor->info.fileCount );
2130	for( i = 0; i < tor->info.fileCount; ++i )
2131	p[i] = tor->info.files[i].priority;
2132	tr_torrentUnlock( tor );
2133
2134	return p;
2135	}
2136
2137	/**
2138	*** File DND
2139	**/
2140
2141	static void
2142	setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
2143	{
2144	tr_file * file;
2145	const int8_t dnd = !doDownload;
2146	tr_piece_index_t firstPiece;
2147	int8_t firstPieceDND;
2148	tr_piece_index_t lastPiece;
2149	int8_t lastPieceDND;
2150	tr_file_index_t i;
2151
2152	assert( tr_isTorrent( tor ) );
2153
2154	file = &tor->info.files[fileIndex];
2155	file->dnd = dnd;
2156	firstPiece = file->firstPiece;
2157	lastPiece = file->lastPiece;
2158
2159	/* can't set the first piece to DND unless
2160	every file using that piece is DND */
2161	firstPieceDND = dnd;
2162	if( fileIndex > 0 )
2163	{
2164	for( i = fileIndex - 1; firstPieceDND; --i )
2165	{
2166	if( tor->info.files[i].lastPiece != firstPiece )
2167	break;
2168	firstPieceDND = tor->info.files[i].dnd;
2169	if( !i )
2170	break;
2171	}
2172	}
2173
2174	/* can't set the last piece to DND unless
2175	every file using that piece is DND */
2176	lastPieceDND = dnd;
2177	for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
2178	{
2179	if( tor->info.files[i].firstPiece != lastPiece )
2180	break;
2181	lastPieceDND = tor->info.files[i].dnd;
2182	}
2183
2184	if( firstPiece == lastPiece )
2185	{
2186	tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
2187	}
2188	else
2189	{
2190	tr_piece_index_t pp;
2191	tor->info.pieces[firstPiece].dnd = firstPieceDND;
2192	tor->info.pieces[lastPiece].dnd = lastPieceDND;
2193	for( pp = firstPiece + 1; pp < lastPiece; ++pp )
2194	tor->info.pieces[pp].dnd = dnd;
2195	}
2196	}
2197
2198	void
2199	tr_torrentInitFileDLs( tr_torrent * tor,
2200	const tr_file_index_t * files,
2201	tr_file_index_t fileCount,
2202	tr_bool doDownload )
2203	{
2204	tr_file_index_t i;
2205
2206	assert( tr_isTorrent( tor ) );
2207
2208	tr_torrentLock( tor );
2209
2210	for( i=0; i<fileCount; ++i )
2211	if( files[i] < tor->info.fileCount )
2212	setFileDND( tor, files[i], doDownload );
2213
2214	tr_cpInvalidateDND( &tor->completion );
2215
2216	tr_torrentUnlock( tor );
2217	}
2218
2219	void
2220	tr_torrentSetFileDLs( tr_torrent * tor,
2221	const tr_file_index_t * files,
2222	tr_file_index_t fileCount,
2223	tr_bool doDownload )
2224	{
2225	assert( tr_isTorrent( tor ) );
2226	tr_torrentLock( tor );
2227
2228	tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
2229	tr_torrentSetDirty( tor );
2230	tr_peerMgrRebuildRequests( tor );
2231
2232	tr_torrentUnlock( tor );
2233	}
2234
2235	/***
2236	****
2237	***/
2238
2239	tr_priority_t
2240	tr_torrentGetPriority( const tr_torrent * tor )
2241	{
2242	assert( tr_isTorrent( tor ) );
2243
2244	return tor->bandwidth->priority;
2245	}
2246
2247	void
2248	tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
2249	{
2250	assert( tr_isTorrent( tor ) );
2251	assert( tr_isPriority( priority ) );
2252
2253	if( tor->bandwidth->priority != priority )
2254	{
2255	tor->bandwidth->priority = priority;
2256
2257	tr_torrentSetDirty( tor );
2258	}
2259	}
2260
2261	/***
2262	****
2263	***/
2264
2265	void
2266	tr_torrentSetPeerLimit( tr_torrent * tor,
2267	uint16_t maxConnectedPeers )
2268	{
2269	assert( tr_isTorrent( tor ) );
2270
2271	if ( tor->maxConnectedPeers != maxConnectedPeers )
2272	{
2273	tor->maxConnectedPeers = maxConnectedPeers;
2274
2275	tr_torrentSetDirty( tor );
2276	}
2277	}
2278
2279	uint16_t
2280	tr_torrentGetPeerLimit( const tr_torrent * tor )
2281	{
2282	assert( tr_isTorrent( tor ) );
2283
2284	return tor->maxConnectedPeers;
2285	}
2286
2287	/***
2288	****
2289	***/
2290
2291	tr_block_index_t
2292	_tr_block( const tr_torrent * tor,
2293	tr_piece_index_t index,
2294	uint32_t offset )
2295	{
2296	tr_block_index_t ret;
2297
2298	assert( tr_isTorrent( tor ) );
2299
2300	ret = index;
2301	ret *= ( tor->info.pieceSize / tor->blockSize );
2302	ret += offset / tor->blockSize;
2303	return ret;
2304	}
2305
2306	tr_bool
2307	tr_torrentReqIsValid( const tr_torrent * tor,
2308	tr_piece_index_t index,
2309	uint32_t offset,
2310	uint32_t length )
2311	{
2312	int err = 0;
2313
2314	assert( tr_isTorrent( tor ) );
2315
2316	if( index >= tor->info.pieceCount )
2317	err = 1;
2318	else if( length < 1 )
2319	err = 2;
2320	else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
2321	err = 3;
2322	else if( length > MAX_BLOCK_SIZE )
2323	err = 4;
2324	else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
2325	err = 5;
2326
2327	if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
2328	(unsigned long)index,
2329	(unsigned long)offset,
2330	(unsigned long)length,
2331	err );
2332
2333	return !err;
2334	}
2335
2336	uint64_t
2337	tr_pieceOffset( const tr_torrent * tor,
2338	tr_piece_index_t index,
2339	uint32_t offset,
2340	uint32_t length )
2341	{
2342	uint64_t ret;
2343
2344	assert( tr_isTorrent( tor ) );
2345
2346	ret = tor->info.pieceSize;
2347	ret *= index;
2348	ret += offset;
2349	ret += length;
2350	return ret;
2351	}
2352
2353	/***
2354	****
2355	***/
2356
2357	void
2358	tr_torrentSetPieceChecked( tr_torrent * tor, tr_piece_index_t pieceIndex )
2359	{
2360	assert( tr_isTorrent( tor ) );
2361	assert( pieceIndex < tor->info.pieceCount );
2362
2363	tor->info.pieces[pieceIndex].timeChecked = tr_time( );
2364	}
2365
2366	void
2367	tr_torrentSetChecked( tr_torrent * tor, time_t when )
2368	{
2369	tr_piece_index_t i, n;
2370
2371	assert( tr_isTorrent( tor ) );
2372
2373	for( i=0, n=tor->info.pieceCount; i!=n; ++i )
2374	tor->info.pieces[i].timeChecked = when;
2375	}
2376
2377	tr_bool
2378	tr_torrentCheckPiece( tr_torrent * tor, tr_piece_index_t pieceIndex )
2379	{
2380	const tr_bool pass = tr_ioTestPiece( tor, pieceIndex );
2381
2382	tr_deeplog_tor( tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass );
2383	tr_torrentSetHasPiece( tor, pieceIndex, pass );
2384	tr_torrentSetPieceChecked( tor, pieceIndex );
2385	tor->anyDate = tr_time( );
2386	tr_torrentSetDirty( tor );
2387
2388	return pass;
2389	}
2390
2391	time_t
2392	tr_torrentGetFileMTime( const tr_torrent * tor, tr_file_index_t i )
2393	{
2394	struct stat sb;
2395	time_t mtime = 0;
2396	char * path = tr_torrentFindFile( tor, i );
2397
2398	if( ( path != NULL ) && !stat( path, &sb ) && S_ISREG( sb.st_mode ) )
2399	{
2400	#ifdef SYS_DARWIN
2401	mtime = sb.st_mtimespec.tv_sec;
2402	#else
2403	mtime = sb.st_mtime;
2404	#endif
2405	}
2406
2407	tr_free( path );
2408	return mtime;
2409	}
2410
2411	tr_bool
2412	tr_torrentPieceNeedsCheck( const tr_torrent * tor, tr_piece_index_t p )
2413	{
2414	uint64_t unused;
2415	tr_file_index_t f;
2416	const tr_info * inf = tr_torrentInfo( tor );
2417
2418	/* if we've never checked this piece, then it needs to be checked */
2419	if( !inf->pieces[p].timeChecked )
2420	return TRUE;
2421
2422	/* If we think we've completed one of the files in this piece,
2423	* but it's been modified since we last checked it,
2424	* then it needs to be rechecked */
2425	tr_ioFindFileLocation( tor, p, 0, &f, &unused );
2426	for( ; f < inf->fileCount && pieceHasFile( p, &inf->files[f] ); ++f )
2427	if( tr_cpFileIsComplete( &tor->completion, f ) )
2428	if( tr_torrentGetFileMTime( tor, f ) > inf->pieces[p].timeChecked )
2429	return TRUE;
2430
2431	return FALSE;
2432	}
2433
2434	/***
2435	****
2436	***/
2437
2438	static int
2439	compareTrackerByTier( const void * va, const void * vb )
2440	{
2441	const tr_tracker_info * a = va;
2442	const tr_tracker_info * b = vb;
2443
2444	/* sort by tier */
2445	if( a->tier != b->tier )
2446	return a->tier - b->tier;
2447
2448	/* get the effects of a stable sort by comparing the two elements' addresses */
2449	return a - b;
2450	}
2451
2452	tr_bool
2453	tr_torrentSetAnnounceList( tr_torrent * tor,
2454	const tr_tracker_info * trackers_in,
2455	int trackerCount )
2456	{
2457	int i;
2458	tr_benc metainfo;
2459	tr_bool ok = TRUE;
2460	tr_tracker_info * trackers;
2461
2462	tr_torrentLock( tor );
2463
2464	assert( tr_isTorrent( tor ) );
2465
2466	/* ensure the trackers' tiers are in ascending order */
2467	trackers = tr_memdup( trackers_in, sizeof( tr_tracker_info ) * trackerCount );
2468	qsort( trackers, trackerCount, sizeof( tr_tracker_info ), compareTrackerByTier );
2469
2470	/* look for bad URLs */
2471	for( i=0; ok && i<trackerCount; ++i )
2472	if( !tr_urlIsValidTracker( trackers[i].announce ) )
2473	ok = FALSE;
2474
2475	/* save to the .torrent file */
2476	if( ok && !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2477	{
2478	tr_bool hasInfo;
2479	tr_info tmpInfo;
2480
2481	/* remove the old fields */
2482	tr_bencDictRemove( &metainfo, "announce" );
2483	tr_bencDictRemove( &metainfo, "announce-list" );
2484
2485	/* add the new fields */
2486	if( trackerCount > 0 )
2487	{
2488	tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2489	}
2490	if( trackerCount > 1 )
2491	{
2492	int i;
2493	int prevTier = -1;
2494	tr_benc * tier = NULL;
2495	tr_benc * announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2496
2497	for( i=0; i<trackerCount; ++i ) {
2498	if( prevTier != trackers[i].tier ) {
2499	prevTier = trackers[i].tier;
2500	tier = tr_bencListAddList( announceList, 0 );
2501	}
2502	tr_bencListAddStr( tier, trackers[i].announce );
2503	}
2504	}
2505
2506	/* try to parse it back again, to make sure it's good */
2507	memset( &tmpInfo, 0, sizeof( tr_info ) );
2508	if( tr_metainfoParse( tor->session, &metainfo, &tmpInfo,
2509	&hasInfo, &tor->infoDictLength ) )
2510	{
2511	/* it's good, so keep these new trackers and free the old ones */
2512
2513	tr_info swap;
2514	swap.trackers = tor->info.trackers;
2515	swap.trackerCount = tor->info.trackerCount;
2516	tor->info.trackers = tmpInfo.trackers;
2517	tor->info.trackerCount = tmpInfo.trackerCount;
2518	tmpInfo.trackers = swap.trackers;
2519	tmpInfo.trackerCount = swap.trackerCount;
2520
2521	tr_metainfoFree( &tmpInfo );
2522	tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2523	}
2524
2525	/* cleanup */
2526	tr_bencFree( &metainfo );
2527
2528	/* if we had a tracker-related error on this torrent,
2529	* and that tracker's been removed,
2530	* then clear the error */
2531	if( ( tor->error == TR_STAT_TRACKER_WARNING )
2532	\|\| ( tor->error == TR_STAT_TRACKER_ERROR ) )
2533	{
2534	tr_bool clear = TRUE;
2535
2536	for( i=0; clear && i<trackerCount; ++i )
2537	if( !strcmp( trackers[i].announce, tor->errorTracker ) )
2538	clear = FALSE;
2539
2540	if( clear )
2541	tr_torrentClearError( tor );
2542	}
2543
2544	/* tell the announcer to reload this torrent's tracker list */
2545	tr_announcerResetTorrent( tor->session->announcer, tor );
2546	}
2547
2548	tr_torrentUnlock( tor );
2549
2550	tr_free( trackers );
2551	return ok;
2552	}
2553
2554	/**
2555	***
2556	**/
2557
2558	void
2559	tr_torrentSetAddedDate( tr_torrent * tor,
2560	time_t t )
2561	{
2562	assert( tr_isTorrent( tor ) );
2563
2564	tor->addedDate = t;
2565	tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2566	}
2567
2568	void
2569	tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2570	{
2571	assert( tr_isTorrent( tor ) );
2572
2573	tor->activityDate = t;
2574	tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2575	}
2576
2577	void
2578	tr_torrentSetDoneDate( tr_torrent * tor,
2579	time_t t )
2580	{
2581	assert( tr_isTorrent( tor ) );
2582
2583	tor->doneDate = t;
2584	tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2585	}
2586
2587	/**
2588	***
2589	**/
2590
2591	uint64_t
2592	tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2593	{
2594	tr_file_index_t i;
2595	uint64_t bytesLeft = 0;
2596
2597	assert( tr_isTorrent( tor ) );
2598
2599	for( i=0; i<tor->info.fileCount; ++i )
2600	{
2601	if( !tor->info.files[i].dnd )
2602	{
2603	struct stat sb;
2604	const uint64_t length = tor->info.files[i].length;
2605	char * path = tr_torrentFindFile( tor, i );
2606
2607	bytesLeft += length;
2608
2609	if( ( path != NULL ) && !stat( path, &sb )
2610	&& S_ISREG( sb.st_mode )
2611	&& ( (uint64_t)sb.st_size <= length ) )
2612	bytesLeft -= sb.st_size;
2613
2614	tr_free( path );
2615	}
2616	}
2617
2618	return bytesLeft;
2619	}
2620
2621	/****
2622	***** Removing the torrent's local data
2623	****/
2624
2625	static int
2626	vstrcmp( const void * a, const void * b )
2627	{
2628	return strcmp( a, b );
2629	}
2630
2631	static int
2632	compareLongestFirst( const void * a, const void * b )
2633	{
2634	const size_t alen = strlen( a );
2635	const size_t blen = strlen( b );
2636
2637	if( alen != blen )
2638	return alen > blen ? -1 : 1;
2639
2640	return vstrcmp( a, b );
2641	}
2642
2643	static void
2644	addDirtyFile( const char * root,
2645	const char * filename,
2646	tr_ptrArray * dirtyFolders )
2647	{
2648	char * dir = tr_dirname( filename );
2649
2650	/* add the parent folders to dirtyFolders until we reach the root or a known-dirty */
2651	while ( ( dir != NULL )
2652	&& ( strlen( root ) <= strlen( dir ) )
2653	&& ( tr_ptrArrayFindSorted( dirtyFolders, dir, vstrcmp ) == NULL ) )
2654	{
2655	char * tmp;
2656	tr_ptrArrayInsertSorted( dirtyFolders, tr_strdup( dir ), vstrcmp );
2657
2658	tmp = tr_dirname( dir );
2659	tr_free( dir );
2660	dir = tmp;
2661	}
2662
2663	tr_free( dir );
2664	}
2665
2666	static void
2667	walkLocalData( const tr_torrent * tor,
2668	const char * root,
2669	const char * dir,
2670	const char * base,
2671	tr_ptrArray * torrentFiles,
2672	tr_ptrArray * folders,
2673	tr_ptrArray * dirtyFolders )
2674	{
2675	int i;
2676	struct stat sb;
2677	char * buf;
2678
2679	assert( tr_isTorrent( tor ) );
2680
2681	buf = tr_buildPath( dir, base, NULL );
2682	i = stat( buf, &sb );
2683	if( !i )
2684	{
2685	DIR * odir = NULL;
2686
2687	if( S_ISDIR( sb.st_mode ) && ( ( odir = opendir ( buf ) ) ) )
2688	{
2689	struct dirent *d;
2690	tr_ptrArrayInsertSorted( folders, tr_strdup( buf ), vstrcmp );
2691	for( d = readdir( odir ); d != NULL; d = readdir( odir ) )
2692	if( d->d_name && strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) )
2693	walkLocalData( tor, root, buf, d->d_name, torrentFiles, folders, dirtyFolders );
2694	closedir( odir );
2695	}
2696	else if( S_ISREG( sb.st_mode ) && ( sb.st_size > 0 ) )
2697	{
2698	const char * sub = buf + strlen( tor->currentDir ) + strlen( TR_PATH_DELIMITER_STR );
2699	const tr_bool isTorrentFile = tr_ptrArrayFindSorted( torrentFiles, sub, vstrcmp ) != NULL;
2700	if( !isTorrentFile )
2701	addDirtyFile( root, buf, dirtyFolders );
2702	}
2703	}
2704
2705	tr_free( buf );
2706	}
2707
2708	static void
2709	deleteLocalFile( const char * filename, tr_fileFunc fileFunc )
2710	{
2711	struct stat sb;
2712	if( !stat( filename, &sb ) ) /* if file exists... */
2713	fileFunc( filename );
2714	}
2715
2716	static void
2717	deleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2718	{
2719	int i, n;
2720	char ** s;
2721	tr_file_index_t f;
2722	tr_ptrArray torrentFiles = TR_PTR_ARRAY_INIT;
2723	tr_ptrArray folders = TR_PTR_ARRAY_INIT;
2724	tr_ptrArray dirtyFolders = TR_PTR_ARRAY_INIT; /* dirty == contains non-torrent files */
2725
2726	const char * firstFile = tor->info.files[0].name;
2727	const char * cpch = strchr( firstFile, TR_PATH_DELIMITER );
2728	char * tmp = cpch ? tr_strndup( firstFile, cpch - firstFile ) : NULL;
2729	char * root = tr_buildPath( tor->currentDir, tmp, NULL );
2730
2731	assert( tr_isTorrent( tor ) );
2732
2733	for( f=0; f<tor->info.fileCount; ++f ) {
2734	tr_ptrArrayInsertSorted( &torrentFiles, tr_strdup( tor->info.files[f].name ), vstrcmp );
2735	tr_ptrArrayInsertSorted( &torrentFiles, tr_torrentBuildPartial( tor, f ), vstrcmp );
2736	}
2737
2738	/* build the set of folders and dirtyFolders */
2739	walkLocalData( tor, root, root, NULL, &torrentFiles, &folders, &dirtyFolders );
2740
2741	/* try to remove entire folders first, so that the recycle bin will be tidy */
2742	s = (char**) tr_ptrArrayPeek( &folders, &n );
2743	for( i=0; i<n; ++i )
2744	if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2745	deleteLocalFile( s[i], fileFunc );
2746
2747	/* now blow away any remaining torrent files, such as torrent files in dirty folders */
2748	for( i=0, n=tr_ptrArraySize( &torrentFiles ); i<n; ++i ) {
2749	char * path = tr_buildPath( tor->currentDir, tr_ptrArrayNth( &torrentFiles, i ), NULL );
2750	deleteLocalFile( path, fileFunc );
2751	tr_free( path );
2752	}
2753
2754	/* Now clean out the directories left empty from the previous step.
2755	* Work from deepest to shallowest s.t. lower folders
2756	* won't prevent the upper folders from being deleted */
2757	{
2758	tr_ptrArray cleanFolders = TR_PTR_ARRAY_INIT;
2759	s = (char**) tr_ptrArrayPeek( &folders, &n );
2760	for( i=0; i<n; ++i )
2761	if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2762	tr_ptrArrayInsertSorted( &cleanFolders, s[i], compareLongestFirst );
2763	s = (char**) tr_ptrArrayPeek( &cleanFolders, &n );
2764	for( i=0; i<n; ++i ) {
2765	#ifdef SYS_DARWIN
2766	char * dsStore = tr_buildPath( s[i], ".DS_Store", NULL );
2767	deleteLocalFile( dsStore, fileFunc );
2768	tr_free( dsStore );
2769	#endif
2770	deleteLocalFile( s[i], fileFunc );
2771	}
2772	tr_ptrArrayDestruct( &cleanFolders, NULL );
2773	}
2774
2775	/* cleanup */
2776	tr_ptrArrayDestruct( &dirtyFolders, tr_free );
2777	tr_ptrArrayDestruct( &folders, tr_free );
2778	tr_ptrArrayDestruct( &torrentFiles, tr_free );
2779	tr_free( root );
2780	tr_free( tmp );
2781	}
2782
2783	static void
2784	tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2785	{
2786	assert( tr_isTorrent( tor ) );
2787
2788	if( fileFunc == NULL )
2789	fileFunc = remove;
2790
2791	/* close all the files because we're about to delete them */
2792	tr_cacheFlushTorrent( tor->session->cache, tor );
2793	tr_fdTorrentClose( tor->session, tor->uniqueId );
2794
2795	if( tor->info.fileCount > 1 )
2796	{
2797	deleteLocalData( tor, fileFunc );
2798	}
2799	else if( tor->info.fileCount == 1 )
2800	{
2801	char * tmp;
2802
2803	/* torrent only has one file */
2804	char * path = tr_buildPath( tor->currentDir, tor->info.files[0].name, NULL );
2805	deleteLocalFile( path, fileFunc );
2806	tr_free( path );
2807
2808	tmp = tr_torrentBuildPartial( tor, 0 );
2809	path = tr_buildPath( tor->currentDir, tmp, NULL );
2810	deleteLocalFile( path, fileFunc );
2811	tr_free( path );
2812	tr_free( tmp );
2813	}
2814	}
2815
2816	/***
2817	****
2818	***/
2819
2820	struct LocationData
2821	{
2822	tr_bool move_from_old_location;
2823	int * setme_state;
2824	double * setme_progress;
2825	char * location;
2826	tr_torrent * tor;
2827	};
2828
2829	static void
2830	setLocation( void * vdata )
2831	{
2832	tr_bool err = FALSE;
2833	struct LocationData * data = vdata;
2834	tr_torrent * tor = data->tor;
2835	const tr_bool do_move = data->move_from_old_location;
2836	const char * location = data->location;
2837	double bytesHandled = 0;
2838
2839	assert( tr_isTorrent( tor ) );
2840
2841	tr_dbg( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
2842	tr_torrentName(tor), tor->currentDir, location );
2843
2844	tr_mkdirp( location, 0777 );
2845
2846	if( !tr_is_same_file( location, tor->currentDir ) )
2847	{
2848	tr_file_index_t i;
2849
2850	/* bad idea to move files while they're being verified... */
2851	tr_verifyRemove( tor );
2852
2853	/* try to move the files.
2854	* FIXME: there are still all kinds of nasty cases, like what
2855	* if the target directory runs out of space halfway through... */
2856	for( i=0; !err && i<tor->info.fileCount; ++i )
2857	{
2858	const tr_file * f = &tor->info.files[i];
2859	const char * oldbase;
2860	char * sub;
2861	if( tr_torrentFindFile2( tor, i, &oldbase, &sub ) )
2862	{
2863	char * oldpath = tr_buildPath( oldbase, sub, NULL );
2864	char * newpath = tr_buildPath( location, sub, NULL );
2865
2866	tr_dbg( "Found file #%d: %s", (int)i, oldpath );
2867
2868	if( do_move && !tr_is_same_file( oldpath, newpath ) )
2869	{
2870	tr_bool renamed = FALSE;
2871	errno = 0;
2872	tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2873	if( tr_moveFile( oldpath, newpath, &renamed ) )
2874	{
2875	err = TRUE;
2876	tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2877	oldpath, newpath, tr_strerror( errno ) );
2878	}
2879	}
2880
2881	tr_free( newpath );
2882	tr_free( oldpath );
2883	tr_free( sub );
2884	}
2885
2886	if( data->setme_progress )
2887	{
2888	bytesHandled += f->length;
2889	*data->setme_progress = bytesHandled / tor->info.totalSize;
2890	}
2891	}
2892
2893	if( !err )
2894	{
2895	/* blow away the leftover subdirectories in the old location */
2896	if( do_move )
2897	tr_torrentDeleteLocalData( tor, remove );
2898
2899	/* set the new location and reverify */
2900	tr_torrentSetDownloadDir( tor, location );
2901	}
2902	}
2903
2904	if( !err && do_move )
2905	{
2906	tr_free( tor->incompleteDir );
2907	tor->incompleteDir = NULL;
2908	tor->currentDir = tor->downloadDir;
2909	}
2910
2911	if( data->setme_state )
2912	*data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2913
2914	/* cleanup */
2915	tr_free( data->location );
2916	tr_free( data );
2917	}
2918
2919	void
2920	tr_torrentSetLocation( tr_torrent * tor,
2921	const char * location,
2922	tr_bool move_from_old_location,
2923	double * setme_progress,
2924	int * setme_state )
2925	{
2926	struct LocationData * data;
2927
2928	assert( tr_isTorrent( tor ) );
2929
2930	if( setme_state )
2931	*setme_state = TR_LOC_MOVING;
2932	if( setme_progress )
2933	*setme_progress = 0;
2934
2935	/* run this in the libtransmission thread */
2936	data = tr_new( struct LocationData, 1 );
2937	data->tor = tor;
2938	data->location = tr_strdup( location );
2939	data->move_from_old_location = move_from_old_location;
2940	data->setme_state = setme_state;
2941	data->setme_progress = setme_progress;
2942	tr_runInEventThread( tor->session, setLocation, data );
2943	}
2944
2945	/***
2946	****
2947	***/
2948
2949	void
2950	tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
2951	{
2952	char * sub;
2953	const char * base;
2954	const tr_info * inf = &tor->info;
2955	const tr_file * f = &inf->files[fileNum];
2956	tr_piece * p;
2957	const tr_piece * pend;
2958	const time_t now = tr_time( );
2959
2960	/* close the file so that we can reopen in read-only mode as needed */
2961	tr_fdFileClose( tor->session, tor, fileNum );
2962
2963	/* now that the file is complete and closed, we can start watching its
2964	* mtime timestamp for changes to know if we need to reverify pieces */
2965	for( p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p )
2966	p->timeChecked = now;
2967
2968	/* if the torrent's current filename isn't the same as the one in the
2969	* metadata -- for example, if it had the ".part" suffix appended to
2970	* it until now -- then rename it to match the one in the metadata */
2971	if( tr_torrentFindFile2( tor, fileNum, &base, &sub ) )
2972	{
2973	if( strcmp( sub, f->name ) )
2974	{
2975	char * oldpath = tr_buildPath( base, sub, NULL );
2976	char * newpath = tr_buildPath( base, f->name, NULL );
2977
2978	if( rename( oldpath, newpath ) )
2979	tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
2980
2981	tr_free( newpath );
2982	tr_free( oldpath );
2983	}
2984
2985	tr_free( sub );
2986	}
2987	}
2988
2989	/***
2990	****
2991	***/
2992
2993	static tr_bool
2994	fileExists( const char * filename )
2995	{
2996	struct stat sb;
2997	const tr_bool ok = !stat( filename, &sb );
2998	return ok;
2999	}
3000
3001	tr_bool
3002	tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
3003	const char base, char subpath )
3004	{
3005	char * part;
3006	const tr_file * file;
3007	const char * b = NULL;
3008	const char * s = NULL;
3009
3010	assert( tr_isTorrent( tor ) );
3011	assert( fileNum < tor->info.fileCount );
3012
3013	file = &tor->info.files[fileNum];
3014	part = tr_torrentBuildPartial( tor, fileNum );
3015
3016	if( b == NULL ) {
3017	char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
3018	if( fileExists( filename ) ) {
3019	b = tor->downloadDir;
3020	s = file->name;
3021	}
3022	tr_free( filename );
3023	}
3024
3025	if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3026	char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
3027	if( fileExists( filename ) ) {
3028	b = tor->incompleteDir;
3029	s = file->name;
3030	}
3031	tr_free( filename );
3032	}
3033
3034	if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3035	char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
3036	if( fileExists( filename ) ) {
3037	b = tor->incompleteDir;
3038	s = part;
3039	}
3040	tr_free( filename );
3041	}
3042
3043	if( b == NULL) {
3044	char * filename = tr_buildPath( tor->downloadDir, part, NULL );
3045	if( fileExists( filename ) ) {
3046	b = tor->downloadDir;
3047	s = part;
3048	}
3049	tr_free( filename );
3050	}
3051
3052	if( base != NULL )
3053	*base = b;
3054	if( subpath != NULL )
3055	*subpath = tr_strdup( s );
3056
3057	tr_free( part );
3058	return b != NULL;
3059	}
3060
3061	char*
3062	tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
3063	{
3064	char * subpath;
3065	char * ret = NULL;
3066	const char * base;
3067
3068	if( tr_torrentFindFile2( tor, fileNum, &base, &subpath ) )
3069	{
3070	ret = tr_buildPath( base, subpath, NULL );
3071	tr_free( subpath );
3072	}
3073
3074	return ret;
3075	}
3076
3077	/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
3078	static void
3079	refreshCurrentDir( tr_torrent * tor )
3080	{
3081	const char * dir = NULL;
3082
3083	if( tor->incompleteDir == NULL )
3084	dir = tor->downloadDir;
3085	else if( !tr_torrentHasMetadata( tor ) ) /* no files to find */
3086	dir = tor->incompleteDir;
3087	else if( !tr_torrentFindFile2( tor, 0, &dir, NULL ) )
3088	dir = tor->incompleteDir;
3089
3090	assert( dir != NULL );
3091	assert( ( dir == tor->downloadDir ) \|\| ( dir == tor->incompleteDir ) );
3092	tor->currentDir = dir;
3093	}
3094
3095	char*
3096	tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
3097	{
3098	return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
3099	}

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