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source: trunk/libtransmission/torrent.c @ 12931

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Last change on this file since 12931 was 12931, checked in by jordan, 11 years ago
munge tr_torrent's memory immediately before freeing it.
Property svn:keywords set to `Date Rev Author Id`
File size: 87.1 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 12931 2011-09-28 16:06:19Z 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
72	const char *
73	tr_torrentName( const tr_torrent * tor )
74	{
75	assert( tr_isTorrent( tor ) );
76
77	return tor->info.name;
78	}
79
80	int
81	tr_torrentId( const tr_torrent * tor )
82	{
83	return tor->uniqueId;
84	}
85
86	tr_torrent*
87	tr_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
98	tr_torrent*
99	tr_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
110	tr_torrent*
111	tr_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
123	tr_torrent*
124	tr_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
138	tr_torrent*
139	tr_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
152	bool
153	tr_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
175	void
176	tr_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	}
185	void
186	tr_torrentSetSpeedLimit_KBps( tr_torrent * tor, tr_direction dir, int KBps )
187	{
188	tr_torrentSetSpeedLimit_Bps( tor, dir, toSpeedBytes( KBps ) );
189	}
190
191	int
192	tr_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	}
199	int
200	tr_torrentGetSpeedLimit_KBps( const tr_torrent * tor, tr_direction dir )
201	{
202	return toSpeedKBps( tr_torrentGetSpeedLimit_Bps( tor, dir ) );
203	}
204
205	void
206	tr_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
215	bool
216	tr_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
224	void
225	tr_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
238	bool
239	tr_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
250	void
251	tr_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
264	tr_ratiolimit
265	tr_torrentGetRatioMode( const tr_torrent * tor )
266	{
267	assert( tr_isTorrent( tor ) );
268
269	return tor->ratioLimitMode;
270	}
271
272	void
273	tr_torrentSetRatioLimit( tr_torrent * tor, double desiredRatio )
274	{
275	assert( tr_isTorrent( tor ) );
276
277	if( (int)(desiredRatio100.0) != (int)(tor->desiredRatio100.0) )
278	{
279	tor->desiredRatio = desiredRatio;
280
281	tr_torrentSetDirty( tor );
282	}
283	}
284
285	double
286	tr_torrentGetRatioLimit( const tr_torrent * tor )
287	{
288	assert( tr_isTorrent( tor ) );
289
290	return tor->desiredRatio;
291	}
292
293	bool
294	tr_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 */
322	static bool
323	tr_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
344	static bool
345	tr_torrentIsSeedRatioDone( tr_torrent * tor )
346	{
347	uint64_t bytesLeft;
348	return tr_torrentGetSeedRatioBytes( tor, &bytesLeft, NULL ) && !bytesLeft;
349	}
350
351	/***
352	****
353	***/
354
355	void
356	tr_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
369	tr_idlelimit
370	tr_torrentGetIdleMode( const tr_torrent * tor )
371	{
372	assert( tr_isTorrent( tor ) );
373
374	return tor->idleLimitMode;
375	}
376
377	void
378	tr_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
390	uint16_t
391	tr_torrentGetIdleLimit( const tr_torrent * tor )
392	{
393	assert( tr_isTorrent( tor ) );
394
395	return tor->idleLimitMinutes;
396	}
397
398	bool
399	tr_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
425	static bool
426	tr_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
437	void
438	tr_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
474	void
475	tr_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
493	static void
494	tr_torrentClearError( tr_torrent * tor )
495	{
496	tor->error = TR_STAT_OK;
497	tor->errorString[0] = '\0';
498	tor->errorTracker[0] = '\0';
499	}
500
501	static void
502	onTrackerResponse( 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	break;
521	}
522
523	case TR_TRACKER_WARNING:
524	tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
525	tor->error = TR_STAT_TRACKER_WARNING;
526	tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
527	tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
528	break;
529
530	case TR_TRACKER_ERROR:
531	tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
532	tor->error = TR_STAT_TRACKER_ERROR;
533	tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
534	tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
535	break;
536
537	case TR_TRACKER_ERROR_CLEAR:
538	if( tor->error != TR_STAT_LOCAL_ERROR )
539	tr_torrentClearError( tor );
540	break;
541	}
542	}
543
544	/***
545	****
546	**** TORRENT INSTANTIATION
547	****
548	***/
549
550	static tr_piece_index_t
551	getBytePiece( const tr_info * info, uint64_t byteOffset )
552	{
553	assert( info );
554	assert( info->pieceSize != 0 );
555
556	return byteOffset / info->pieceSize;
557	}
558
559	static void
560	initFilePieces( tr_info * info,
561	tr_file_index_t fileIndex )
562	{
563	tr_file * file;
564	uint64_t firstByte, lastByte;
565
566	assert( info );
567	assert( fileIndex < info->fileCount );
568
569	file = &info->files[fileIndex];
570	firstByte = file->offset;
571	lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
572	file->firstPiece = getBytePiece( info, firstByte );
573	file->lastPiece = getBytePiece( info, lastByte );
574	}
575
576	static int
577	pieceHasFile( tr_piece_index_t piece,
578	const tr_file * file )
579	{
580	return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
581	}
582
583	static tr_priority_t
584	calculatePiecePriority( const tr_torrent * tor,
585	tr_piece_index_t piece,
586	int fileHint )
587	{
588	tr_file_index_t i;
589	tr_priority_t priority = TR_PRI_LOW;
590
591	/* find the first file that has data in this piece */
592	if( fileHint >= 0 ) {
593	i = fileHint;
594	while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
595	--i;
596	} else {
597	for( i = 0; i < tor->info.fileCount; ++i )
598	if( pieceHasFile( piece, &tor->info.files[i] ) )
599	break;
600	}
601
602	/* the piece's priority is the max of the priorities
603	* of all the files in that piece */
604	for( ; i < tor->info.fileCount; ++i )
605	{
606	const tr_file * file = &tor->info.files[i];
607
608	if( !pieceHasFile( piece, file ) )
609	break;
610
611	priority = MAX( priority, file->priority );
612
613	/* when dealing with multimedia files, getting the first and
614	last pieces can sometimes allow you to preview it a bit
615	before it's fully downloaded... */
616	if( file->priority >= TR_PRI_NORMAL )
617	if( file->firstPiece == piece \|\| file->lastPiece == piece )
618	priority = TR_PRI_HIGH;
619	}
620
621	return priority;
622	}
623
624	static void
625	tr_torrentInitFilePieces( tr_torrent * tor )
626	{
627	int * firstFiles;
628	tr_file_index_t f;
629	tr_piece_index_t p;
630	uint64_t offset = 0;
631	tr_info * inf = &tor->info;
632
633	/* assign the file offsets */
634	for( f=0; f<inf->fileCount; ++f ) {
635	inf->files[f].offset = offset;
636	offset += inf->files[f].length;
637	initFilePieces( inf, f );
638	}
639
640	/* build the array of first-file hints to give calculatePiecePriority */
641	firstFiles = tr_new( int, inf->pieceCount );
642	for( p=f=0; p<inf->pieceCount; ++p ) {
643	while( inf->files[f].lastPiece < p )
644	++f;
645	firstFiles[p] = f;
646	}
647
648	#if 0
649	/* test to confirm the first-file hints are correct */
650	for( p=0; p<inf->pieceCount; ++p ) {
651	f = firstFiles[p];
652	assert( inf->files[f].firstPiece <= p );
653	assert( inf->files[f].lastPiece >= p );
654	if( f > 0 )
655	assert( inf->files[f-1].lastPiece < p );
656	for( f=0; f<inf->fileCount; ++f )
657	if( pieceHasFile( p, &inf->files[f] ) )
658	break;
659	assert( (int)f == firstFiles[p] );
660	}
661	#endif
662
663	for( p=0; p<inf->pieceCount; ++p )
664	inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
665
666	tr_free( firstFiles );
667	}
668
669	static void torrentStart( tr_torrent * tor, bool bypass_queue );
670
671	/**
672	* Decide on a block size. Constraints:
673	* (1) most clients decline requests over 16 KiB
674	* (2) pieceSize must be a multiple of block size
675	*/
676	uint32_t
677	tr_getBlockSize( uint32_t pieceSize )
678	{
679	uint32_t b = pieceSize;
680
681	while( b > MAX_BLOCK_SIZE )
682	b /= 2u;
683
684	if( !b \|\| ( pieceSize % b ) ) /* not cleanly divisible */
685	return 0;
686	return b;
687	}
688
689	static void refreshCurrentDir( tr_torrent * tor );
690
691	static void
692	torrentInitFromInfo( tr_torrent * tor )
693	{
694	uint64_t t;
695	tr_info * info = &tor->info;
696
697	tor->blockSize = tr_getBlockSize( info->pieceSize );
698
699	if( info->pieceSize )
700	tor->lastPieceSize = (uint32_t)(info->totalSize % info->pieceSize);
701
702	if( !tor->lastPieceSize )
703	tor->lastPieceSize = info->pieceSize;
704
705	if( tor->blockSize )
706	tor->lastBlockSize = info->totalSize % tor->blockSize;
707
708	if( !tor->lastBlockSize )
709	tor->lastBlockSize = tor->blockSize;
710
711	tor->blockCount = tor->blockSize
712	? ( info->totalSize + tor->blockSize - 1 ) / tor->blockSize
713	: 0;
714
715	tor->blockCountInPiece = tor->blockSize
716	? info->pieceSize / tor->blockSize
717	: 0;
718
719	tor->blockCountInLastPiece = tor->blockSize
720	? ( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize
721	: 0;
722
723	/* check our work */
724	if( tor->blockSize != 0 )
725	assert( ( info->pieceSize % tor->blockSize ) == 0 );
726	t = info->pieceCount - 1;
727	t *= info->pieceSize;
728	t += tor->lastPieceSize;
729	assert( t == info->totalSize );
730	t = tor->blockCount - 1;
731	t *= tor->blockSize;
732	t += tor->lastBlockSize;
733	assert( t == info->totalSize );
734	t = info->pieceCount - 1;
735	t *= tor->blockCountInPiece;
736	t += tor->blockCountInLastPiece;
737	assert( t == (uint64_t)tor->blockCount );
738
739	tr_cpConstruct( &tor->completion, tor );
740
741	tr_torrentInitFilePieces( tor );
742
743	tor->completeness = tr_cpGetStatus( &tor->completion );
744	}
745
746	static void tr_torrentFireMetadataCompleted( tr_torrent * tor );
747
748	void
749	tr_torrentGotNewInfoDict( tr_torrent * tor )
750	{
751	torrentInitFromInfo( tor );
752
753	tr_peerMgrOnTorrentGotMetainfo( tor );
754
755	tr_torrentFireMetadataCompleted( tor );
756	}
757
758	static bool
759	hasAnyLocalData( const tr_torrent * tor )
760	{
761	tr_file_index_t i;
762
763	for( i=0; i<tor->info.fileCount; ++i )
764	if( tr_torrentFindFile2( tor, i, NULL, NULL, NULL ) )
765	return true;
766
767	return false;
768	}
769
770	static bool
771	setLocalErrorIfFilesDisappeared( tr_torrent * tor )
772	{
773	const bool disappeared = ( tr_cpHaveTotal( &tor->completion ) > 0 ) && !hasAnyLocalData( tor );
774
775	if( disappeared )
776	{
777	tr_deeplog_tor( tor, "%s", "[LAZY] uh oh, the files disappeared" );
778	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." ) );
779	}
780
781	return disappeared;
782	}
783
784	static void
785	torrentInit( tr_torrent * tor, const tr_ctor * ctor )
786	{
787	int doStart;
788	uint64_t loaded;
789	const char * dir;
790	bool isNewTorrent;
791	struct stat st;
792	static int nextUniqueId = 1;
793	tr_session * session = tr_ctorGetSession( ctor );
794
795	assert( session != NULL );
796
797	tr_sessionLock( session );
798
799	tor->session = session;
800	tor->uniqueId = nextUniqueId++;
801	tor->magicNumber = TORRENT_MAGIC_NUMBER;
802	tor->queuePosition = session->torrentCount;
803
804	tr_peerIdInit( tor->peer_id );
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	tr_bandwidthConstruct( &tor->bandwidth, 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	/* add the torrent to tr_session.torrentList */
870	session->torrentCount++;
871	if( session->torrentList == NULL )
872	session->torrentList = tor;
873	else {
874	tr_torrent * it = session->torrentList;
875	while( it->next != NULL )
876	it = it->next;
877	it->next = tor;
878	}
879
880	/* if we don't have a local .torrent file already, assume the torrent is new */
881	isNewTorrent = stat( tor->info.torrent, &st );
882
883	/* maybe save our own copy of the metainfo */
884	if( tr_ctorGetSave( ctor ) )
885	{
886	const tr_benc * val;
887	if( !tr_ctorGetMetainfo( ctor, &val ) )
888	{
889	const char * path = tor->info.torrent;
890	const int err = tr_bencToFile( val, TR_FMT_BENC, path );
891	if( err )
892	tr_torrentSetLocalError( tor, "Unable to save torrent file: %s", tr_strerror( err ) );
893	tr_sessionSetTorrentFile( tor->session, tor->info.hashString, path );
894	}
895	}
896
897	tor->tiers = tr_announcerAddTorrent( tor, onTrackerResponse, NULL );
898
899	if( isNewTorrent )
900	{
901	tor->startAfterVerify = doStart;
902	tr_torrentVerify( tor );
903	}
904	else if( doStart )
905	{
906	tr_torrentStart( tor );
907	}
908
909	tr_sessionUnlock( session );
910	}
911
912	static tr_parse_result
913	torrentParseImpl( const tr_ctor * ctor, tr_info * setmeInfo,
914	bool * setmeHasInfo, int * dictLength )
915	{
916	int doFree;
917	bool didParse;
918	bool hasInfo = false;
919	tr_info tmp;
920	const tr_benc * metainfo;
921	tr_session * session = tr_ctorGetSession( ctor );
922	tr_parse_result result = TR_PARSE_OK;
923
924	if( setmeInfo == NULL )
925	setmeInfo = &tmp;
926	memset( setmeInfo, 0, sizeof( tr_info ) );
927
928	if( tr_ctorGetMetainfo( ctor, &metainfo ) )
929	return TR_PARSE_ERR;
930
931	didParse = tr_metainfoParse( session, metainfo, setmeInfo,
932	&hasInfo, dictLength );
933	doFree = didParse && ( setmeInfo == &tmp );
934
935	if( !didParse )
936	result = TR_PARSE_ERR;
937
938	if( didParse && hasInfo && !tr_getBlockSize( setmeInfo->pieceSize ) )
939	result = TR_PARSE_ERR;
940
941	if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
942	result = TR_PARSE_DUPLICATE;
943
944	if( doFree )
945	tr_metainfoFree( setmeInfo );
946
947	if( setmeHasInfo != NULL )
948	*setmeHasInfo = hasInfo;
949
950	return result;
951	}
952
953	tr_parse_result
954	tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
955	{
956	return torrentParseImpl( ctor, setmeInfo, NULL, NULL );
957	}
958
959	tr_torrent *
960	tr_torrentNew( const tr_ctor * ctor, int * setmeError )
961	{
962	int len;
963	bool hasInfo;
964	tr_info tmpInfo;
965	tr_parse_result r;
966	tr_torrent * tor = NULL;
967
968	assert( ctor != NULL );
969	assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
970
971	r = torrentParseImpl( ctor, &tmpInfo, &hasInfo, &len );
972	if( r == TR_PARSE_OK )
973	{
974	tor = tr_new0( tr_torrent, 1 );
975	tor->info = tmpInfo;
976	if( hasInfo )
977	tor->infoDictLength = len;
978	torrentInit( tor, ctor );
979	}
980	else
981	{
982	if( r == TR_PARSE_DUPLICATE )
983	tr_metainfoFree( &tmpInfo );
984
985	if( setmeError )
986	*setmeError = r;
987	}
988
989	return tor;
990	}
991
992	/**
993	***
994	**/
995
996	void
997	tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
998	{
999	assert( tr_isTorrent( tor ) );
1000
1001	if( !path \|\| !tor->downloadDir \|\| strcmp( path, tor->downloadDir ) )
1002	{
1003	tr_free( tor->downloadDir );
1004	tor->downloadDir = tr_strdup( path );
1005	tr_torrentSetDirty( tor );
1006	}
1007
1008	refreshCurrentDir( tor );
1009	}
1010
1011	const char*
1012	tr_torrentGetDownloadDir( const tr_torrent * tor )
1013	{
1014	assert( tr_isTorrent( tor ) );
1015
1016	return tor->downloadDir;
1017	}
1018
1019	const char *
1020	tr_torrentGetCurrentDir( const tr_torrent * tor )
1021	{
1022	assert( tr_isTorrent( tor ) );
1023
1024	return tor->currentDir;
1025	}
1026
1027
1028	void
1029	tr_torrentChangeMyPort( tr_torrent * tor )
1030	{
1031	assert( tr_isTorrent( tor ) );
1032
1033	if( tor->isRunning )
1034	tr_announcerChangeMyPort( tor );
1035	}
1036
1037	static inline void
1038	tr_torrentManualUpdateImpl( void * vtor )
1039	{
1040	tr_torrent * tor = vtor;
1041
1042	assert( tr_isTorrent( tor ) );
1043
1044	if( tor->isRunning )
1045	tr_announcerManualAnnounce( tor );
1046	}
1047
1048	void
1049	tr_torrentManualUpdate( tr_torrent * tor )
1050	{
1051	assert( tr_isTorrent( tor ) );
1052
1053	tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
1054	}
1055
1056	bool
1057	tr_torrentCanManualUpdate( const tr_torrent * tor )
1058	{
1059	return ( tr_isTorrent( tor ) )
1060	&& ( tor->isRunning )
1061	&& ( tr_announcerCanManualAnnounce( tor ) );
1062	}
1063
1064	const tr_info *
1065	tr_torrentInfo( const tr_torrent * tor )
1066	{
1067	return tr_isTorrent( tor ) ? &tor->info : NULL;
1068	}
1069
1070	const tr_stat *
1071	tr_torrentStatCached( tr_torrent * tor )
1072	{
1073	const time_t now = tr_time( );
1074
1075	return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
1076	? &tor->stats
1077	: tr_torrentStat( tor );
1078	}
1079
1080	void
1081	tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
1082	{
1083	assert( tr_isTorrent( tor ) );
1084	assert( state==TR_VERIFY_NONE \|\| state==TR_VERIFY_WAIT \|\| state==TR_VERIFY_NOW );
1085
1086	tor->verifyState = state;
1087	tor->anyDate = tr_time( );
1088	}
1089
1090	static tr_torrent_activity
1091	torrentGetActivity( const tr_torrent * tor )
1092	{
1093	const bool is_seed = tr_torrentIsSeed( tor );
1094	assert( tr_isTorrent( tor ) );
1095
1096	if( tor->verifyState == TR_VERIFY_NOW )
1097	return TR_STATUS_CHECK;
1098
1099	if( tor->verifyState == TR_VERIFY_WAIT )
1100	return TR_STATUS_CHECK_WAIT;
1101
1102	if( tor->isRunning )
1103	return is_seed ? TR_STATUS_SEED : TR_STATUS_DOWNLOAD;
1104
1105	if( tr_torrentIsQueued( tor ) ) {
1106	if( is_seed && tr_sessionGetQueueEnabled( tor->session, TR_UP ) )
1107	return TR_STATUS_SEED_WAIT;
1108	if( !is_seed && tr_sessionGetQueueEnabled( tor->session, TR_DOWN ) )
1109	return TR_STATUS_DOWNLOAD_WAIT;
1110	}
1111
1112	return TR_STATUS_STOPPED;
1113	}
1114
1115	tr_torrent_activity
1116	tr_torrentGetActivity( tr_torrent * tor )
1117	{
1118	/* FIXME: is this call still needed? */
1119	tr_torrentRecheckCompleteness( tor );
1120
1121	return torrentGetActivity( tor );
1122	}
1123
1124	static time_t
1125	torrentGetIdleSecs( const tr_torrent * tor )
1126	{
1127	int idle_secs;
1128	const tr_torrent_activity activity = torrentGetActivity( tor );
1129
1130	if ((activity == TR_STATUS_DOWNLOAD \|\| activity == TR_STATUS_SEED) && tor->startDate != 0)
1131	idle_secs = difftime(tr_time(), MAX(tor->startDate, tor->activityDate));
1132	else
1133	idle_secs = -1;
1134
1135	return idle_secs;
1136	}
1137
1138	bool
1139	tr_torrentIsStalled( const tr_torrent * tor )
1140	{
1141	return tr_sessionGetQueueStalledEnabled( tor->session )
1142	&& ( torrentGetIdleSecs( tor ) > ( tr_sessionGetQueueStalledMinutes( tor->session ) * 60 ) );
1143	}
1144
1145
1146	static double
1147	getVerifyProgress( const tr_torrent * tor )
1148	{
1149	tr_piece_index_t i, n;
1150	tr_piece_index_t checked = 0;
1151
1152	assert( tr_isTorrent( tor ) );
1153
1154	for( i=0, n=tor->info.pieceCount; i!=n; ++i )
1155	if( tor->info.pieces[i].timeChecked )
1156	++checked;
1157
1158	return checked / (double)tor->info.pieceCount;
1159	}
1160
1161	const tr_stat *
1162	tr_torrentStat( tr_torrent * tor )
1163	{
1164	tr_stat * s;
1165	uint64_t now;
1166	uint64_t seedRatioBytesLeft;
1167	uint64_t seedRatioBytesGoal;
1168	bool seedRatioApplies;
1169	uint16_t seedIdleMinutes;
1170
1171	if( !tor )
1172	return NULL;
1173
1174	assert( tr_isTorrent( tor ) );
1175	tr_torrentLock( tor );
1176
1177	tor->lastStatTime = tr_time( );
1178
1179	s = &tor->stats;
1180	s->id = tor->uniqueId;
1181	s->activity = tr_torrentGetActivity( tor );
1182	s->error = tor->error;
1183	s->queuePosition = tor->queuePosition;
1184	s->isStalled = tr_torrentIsStalled( tor );
1185	tr_strlcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
1186
1187	s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
1188
1189	tr_peerMgrTorrentStats( tor,
1190	&s->peersConnected,
1191	&s->webseedsSendingToUs,
1192	&s->peersSendingToUs,
1193	&s->peersGettingFromUs,
1194	s->peersFrom );
1195
1196	now = tr_time_msec( );
1197	s->rawUploadSpeed_KBps = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps ( &tor->bandwidth, now, TR_UP ) );
1198	s->pieceUploadSpeed_KBps = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_UP ) );
1199	s->rawDownloadSpeed_KBps = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps ( &tor->bandwidth, now, TR_DOWN ) );
1200	s->pieceDownloadSpeed_KBps = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_DOWN ) );
1201
1202	s->percentComplete = tr_cpPercentComplete ( &tor->completion );
1203	s->metadataPercentComplete = tr_torrentGetMetadataPercent( tor );
1204
1205	s->percentDone = tr_cpPercentDone ( &tor->completion );
1206	s->leftUntilDone = tr_cpLeftUntilDone( &tor->completion );
1207	s->sizeWhenDone = tr_cpSizeWhenDone ( &tor->completion );
1208	s->recheckProgress = s->activity == TR_STATUS_CHECK ? getVerifyProgress( tor ) : 0;
1209	s->activityDate = tor->activityDate;
1210	s->addedDate = tor->addedDate;
1211	s->doneDate = tor->doneDate;
1212	s->startDate = tor->startDate;
1213	s->secondsSeeding = tor->secondsSeeding;
1214	s->secondsDownloading = tor->secondsDownloading;
1215	s->idleSecs = torrentGetIdleSecs( tor );
1216
1217	s->corruptEver = tor->corruptCur + tor->corruptPrev;
1218	s->downloadedEver = tor->downloadedCur + tor->downloadedPrev;
1219	s->uploadedEver = tor->uploadedCur + tor->uploadedPrev;
1220	s->haveValid = tr_cpHaveValid( &tor->completion );
1221	s->haveUnchecked = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
1222	s->desiredAvailable = tr_peerMgrGetDesiredAvailable( tor );
1223
1224	s->ratio = tr_getRatio( s->uploadedEver,
1225	s->downloadedEver ? s->downloadedEver : s->haveValid );
1226
1227	seedRatioApplies = tr_torrentGetSeedRatioBytes( tor, &seedRatioBytesLeft,
1228	&seedRatioBytesGoal );
1229
1230	switch( s->activity )
1231	{
1232	/* etaXLSpeed exists because if we use the piece speed directly,
1233	* brief fluctuations cause the ETA to jump all over the place.
1234	* so, etaXLSpeed is a smoothed-out version of the piece speed
1235	* to dampen the effect of fluctuations */
1236
1237	case TR_STATUS_DOWNLOAD:
1238	if( ( tor->etaDLSpeedCalculatedAt + 800 ) < now ) {
1239	tor->etaDLSpeed_KBps = ( ( tor->etaDLSpeedCalculatedAt + 4000 ) < now )
1240	? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
1241	: ((tor->etaDLSpeed_KBps4.0) + s->pieceDownloadSpeed_KBps)/5.0; / smooth across 5 readings */
1242	tor->etaDLSpeedCalculatedAt = now;
1243	}
1244
1245	if( s->leftUntilDone > s->desiredAvailable )
1246	s->eta = TR_ETA_NOT_AVAIL;
1247	else if( tor->etaDLSpeed_KBps < 1 )
1248	s->eta = TR_ETA_UNKNOWN;
1249	else
1250	s->eta = s->leftUntilDone / toSpeedBytes(tor->etaDLSpeed_KBps);
1251
1252	s->etaIdle = TR_ETA_NOT_AVAIL;
1253	break;
1254
1255	case TR_STATUS_SEED: {
1256	if( !seedRatioApplies )
1257	s->eta = TR_ETA_NOT_AVAIL;
1258	else {
1259	if( ( tor->etaULSpeedCalculatedAt + 800 ) < now ) {
1260	tor->etaULSpeed_KBps = ( ( tor->etaULSpeedCalculatedAt + 4000 ) < now )
1261	? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
1262	: ((tor->etaULSpeed_KBps4.0) + s->pieceUploadSpeed_KBps)/5.0; / smooth across 5 readings */
1263	tor->etaULSpeedCalculatedAt = now;
1264	}
1265	if( tor->etaULSpeed_KBps < 1 )
1266	s->eta = TR_ETA_UNKNOWN;
1267	else
1268	s->eta = seedRatioBytesLeft / toSpeedBytes(tor->etaULSpeed_KBps);
1269	}
1270
1271	if( tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle( tor, &seedIdleMinutes ) )
1272	s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
1273	else
1274	s->etaIdle = TR_ETA_NOT_AVAIL;
1275	break;
1276	}
1277
1278	default:
1279	s->eta = TR_ETA_NOT_AVAIL;
1280	s->etaIdle = TR_ETA_NOT_AVAIL;
1281	break;
1282	}
1283
1284	/* s->haveValid is here to make sure a torrent isn't marked 'finished'
1285	* when the user hits "uncheck all" prior to starting the torrent... */
1286	s->finished = tor->finishedSeedingByIdle \|\| (seedRatioApplies && !seedRatioBytesLeft && s->haveValid);
1287
1288	if( !seedRatioApplies \|\| s->finished )
1289	s->seedRatioPercentDone = 1;
1290	else if( !seedRatioBytesGoal ) /* impossible? safeguard for div by zero */
1291	s->seedRatioPercentDone = 0;
1292	else
1293	s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
1294
1295	tr_torrentUnlock( tor );
1296
1297	/* test some of the constraints */
1298	assert( s->sizeWhenDone <= tor->info.totalSize );
1299	assert( s->leftUntilDone <= s->sizeWhenDone );
1300	assert( s->desiredAvailable <= s->leftUntilDone );
1301	return s;
1302	}
1303
1304	/***
1305	****
1306	***/
1307
1308	static uint64_t
1309	fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1310	{
1311	uint64_t total = 0;
1312	const tr_file * f = &tor->info.files[index];
1313
1314	if( f->length )
1315	{
1316	tr_block_index_t first;
1317	tr_block_index_t last;
1318	tr_torGetFileBlockRange( tor, index, &first, &last );
1319
1320	if( first == last )
1321	{
1322	if( tr_cpBlockIsComplete( &tor->completion, first ) )
1323	total = f->length;
1324	}
1325	else
1326	{
1327	/* the first block */
1328	if( tr_cpBlockIsComplete( &tor->completion, first ) )
1329	total += tor->blockSize - ( f->offset % tor->blockSize );
1330
1331	/* the middle blocks */
1332	if( first + 1 < last ) {
1333	uint64_t u = tr_bitfieldCountRange( &tor->completion.blockBitfield, first+1, last );
1334	u *= tor->blockSize;
1335	total += u;
1336	}
1337
1338	/* the last block */
1339	if( tr_cpBlockIsComplete( &tor->completion, last ) )
1340	total += ( f->offset + f->length ) - ( (uint64_t)tor->blockSize * last );
1341	}
1342	}
1343
1344	return total;
1345	}
1346
1347	tr_file_stat *
1348	tr_torrentFiles( const tr_torrent * tor,
1349	tr_file_index_t * fileCount )
1350	{
1351	tr_file_index_t i;
1352	const tr_file_index_t n = tor->info.fileCount;
1353	tr_file_stat * files = tr_new0( tr_file_stat, n );
1354	tr_file_stat * walk = files;
1355	const bool isSeed = tor->completeness == TR_SEED;
1356
1357	assert( tr_isTorrent( tor ) );
1358
1359	for( i=0; i<n; ++i, ++walk ) {
1360	const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1361	walk->bytesCompleted = b;
1362	walk->progress = tor->info.files[i].length > 0 ? ( (float)b / tor->info.files[i].length ) : 1.0f;
1363	}
1364
1365	if( fileCount )
1366	*fileCount = n;
1367
1368	return files;
1369	}
1370
1371	void
1372	tr_torrentFilesFree( tr_file_stat * files,
1373	tr_file_index_t fileCount UNUSED )
1374	{
1375	tr_free( files );
1376	}
1377
1378	/***
1379	****
1380	***/
1381
1382	double*
1383	tr_torrentWebSpeeds_KBps( const tr_torrent * tor )
1384	{
1385	double * ret = NULL;
1386
1387	if( tr_isTorrent( tor ) )
1388	{
1389	tr_torrentLock( tor );
1390	ret = tr_peerMgrWebSpeeds_KBps( tor );
1391	tr_torrentUnlock( tor );
1392	}
1393
1394	return ret;
1395	}
1396
1397	tr_peer_stat *
1398	tr_torrentPeers( const tr_torrent * tor, int * peerCount )
1399	{
1400	tr_peer_stat * ret = NULL;
1401
1402	if( tr_isTorrent( tor ) )
1403	{
1404	tr_torrentLock( tor );
1405	ret = tr_peerMgrPeerStats( tor, peerCount );
1406	tr_torrentUnlock( tor );
1407	}
1408
1409	return ret;
1410	}
1411
1412	void
1413	tr_torrentPeersFree( tr_peer_stat * peers, int peerCount UNUSED )
1414	{
1415	tr_free( peers );
1416	}
1417
1418	tr_tracker_stat *
1419	tr_torrentTrackers( const tr_torrent * torrent, int * setmeTrackerCount )
1420	{
1421	tr_tracker_stat * ret = NULL;
1422
1423	if( tr_isTorrent( torrent ) )
1424	{
1425	tr_torrentLock( torrent );
1426	ret = tr_announcerStats( torrent, setmeTrackerCount );
1427	tr_torrentUnlock( torrent );
1428	}
1429
1430	return ret;
1431	}
1432
1433	void
1434	tr_torrentTrackersFree( tr_tracker_stat * trackers, int trackerCount )
1435	{
1436	tr_announcerStatsFree( trackers, trackerCount );
1437	}
1438
1439	void
1440	tr_torrentAvailability( const tr_torrent * tor, int8_t * tab, int size )
1441	{
1442	if( tr_isTorrent( tor ) && ( tab != NULL ) && ( size > 0 ) )
1443	{
1444	tr_torrentLock( tor );
1445	tr_peerMgrTorrentAvailability( tor, tab, size );
1446	tr_torrentUnlock( tor );
1447	}
1448	}
1449
1450	void
1451	tr_torrentAmountFinished( const tr_torrent * tor,
1452	float * tab,
1453	int size )
1454	{
1455	assert( tr_isTorrent( tor ) );
1456
1457	tr_torrentLock( tor );
1458	tr_cpGetAmountDone( &tor->completion, tab, size );
1459	tr_torrentUnlock( tor );
1460	}
1461
1462	static void
1463	tr_torrentResetTransferStats( tr_torrent * tor )
1464	{
1465	tr_torrentLock( tor );
1466
1467	tor->downloadedPrev += tor->downloadedCur;
1468	tor->downloadedCur = 0;
1469	tor->uploadedPrev += tor->uploadedCur;
1470	tor->uploadedCur = 0;
1471	tor->corruptPrev += tor->corruptCur;
1472	tor->corruptCur = 0;
1473
1474	tr_torrentSetDirty( tor );
1475
1476	tr_torrentUnlock( tor );
1477	}
1478
1479	void
1480	tr_torrentSetHasPiece( tr_torrent * tor,
1481	tr_piece_index_t pieceIndex,
1482	bool has )
1483	{
1484	assert( tr_isTorrent( tor ) );
1485	assert( pieceIndex < tor->info.pieceCount );
1486
1487	if( has )
1488	tr_cpPieceAdd( &tor->completion, pieceIndex );
1489	else
1490	tr_cpPieceRem( &tor->completion, pieceIndex );
1491	}
1492
1493	/***
1494	****
1495	***/
1496
1497	#ifndef NDEBUG
1498	static bool queueIsSequenced( tr_session * );
1499	#endif
1500
1501	static void
1502	freeTorrent( tr_torrent * tor )
1503	{
1504	tr_torrent * t;
1505	tr_session * session = tor->session;
1506	tr_info * inf = &tor->info;
1507	const time_t now = tr_time( );
1508
1509	assert( !tor->isRunning );
1510
1511	tr_sessionLock( session );
1512
1513	tr_peerMgrRemoveTorrent( tor );
1514
1515	tr_announcerRemoveTorrent( session->announcer, tor );
1516
1517	tr_cpDestruct( &tor->completion );
1518
1519	tr_free( tor->downloadDir );
1520	tr_free( tor->incompleteDir );
1521
1522	if( tor == session->torrentList )
1523	session->torrentList = tor->next;
1524	else for( t = session->torrentList; t != NULL; t = t->next ) {
1525	if( t->next == tor ) {
1526	t->next = tor->next;
1527	break;
1528	}
1529	}
1530
1531	/* decrement the torrent count */
1532	assert( session->torrentCount >= 1 );
1533	session->torrentCount--;
1534
1535	/* resequence the queue positions */
1536	t = NULL;
1537	while(( t = tr_torrentNext( session, t ))) {
1538	if( t->queuePosition > tor->queuePosition ) {
1539	t->queuePosition--;
1540	t->anyDate = now;
1541	}
1542	}
1543	assert( queueIsSequenced( session ) );
1544
1545	tr_bandwidthDestruct( &tor->bandwidth );
1546
1547	tr_metainfoFree( inf );
1548	memset( tor, ~0, sizeof( tr_torrent ) );
1549	tr_free( tor );
1550
1551	tr_sessionUnlock( session );
1552	}
1553
1554	/**
1555	*** Start/Stop Callback
1556	**/
1557
1558	static void torrentSetQueued( tr_torrent * tor, bool queued );
1559
1560	static void
1561	torrentStartImpl( void * vtor )
1562	{
1563	time_t now;
1564	tr_torrent * tor = vtor;
1565
1566	assert( tr_isTorrent( tor ) );
1567
1568	tr_sessionLock( tor->session );
1569
1570	tr_torrentRecheckCompleteness( tor );
1571	torrentSetQueued( tor, false );
1572
1573	now = tr_time( );
1574	tor->isRunning = true;
1575	tor->completeness = tr_cpGetStatus( &tor->completion );
1576	tor->startDate = tor->anyDate = now;
1577	tr_torrentClearError( tor );
1578	tor->finishedSeedingByIdle = false;
1579
1580	tr_torrentResetTransferStats( tor );
1581	tr_announcerTorrentStarted( tor );
1582	tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1583	tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt( 20 );
1584	tor->lpdAnnounceAt = now;
1585	tr_peerMgrStartTorrent( tor );
1586
1587	tr_sessionUnlock( tor->session );
1588	}
1589
1590	uint64_t
1591	tr_torrentGetCurrentSizeOnDisk( const tr_torrent * tor )
1592	{
1593	tr_file_index_t i;
1594	uint64_t byte_count = 0;
1595	const tr_file_index_t n = tor->info.fileCount;
1596
1597	for( i=0; i<n; ++i )
1598	{
1599	struct stat sb;
1600	char * filename = tr_torrentFindFile( tor, i );
1601
1602	sb.st_size = 0;
1603	if( filename && !stat( filename, &sb ) )
1604	byte_count += sb.st_size;
1605
1606	tr_free( filename );
1607	}
1608
1609	return byte_count;
1610	}
1611
1612	static bool
1613	torrentShouldQueue( const tr_torrent * tor )
1614	{
1615	const tr_direction dir = tr_torrentGetQueueDirection( tor );
1616
1617	return tr_sessionCountQueueFreeSlots( tor->session, dir ) == 0;
1618	}
1619
1620	static void
1621	torrentStart( tr_torrent * tor, bool bypass_queue )
1622	{
1623	switch( torrentGetActivity( tor ) )
1624	{
1625	case TR_STATUS_SEED:
1626	case TR_STATUS_DOWNLOAD:
1627	return; /* already started */
1628	break;
1629
1630	case TR_STATUS_SEED_WAIT:
1631	case TR_STATUS_DOWNLOAD_WAIT:
1632	if( !bypass_queue )
1633	return; /* already queued */
1634	break;
1635
1636	case TR_STATUS_CHECK:
1637	case TR_STATUS_CHECK_WAIT:
1638	/* verifying right now... wait until that's done so
1639	* we'll know what completeness to use/announce */
1640	tor->startAfterVerify = true;
1641	return;
1642	break;
1643
1644	case TR_STATUS_STOPPED:
1645	if( !bypass_queue && torrentShouldQueue( tor ) ) {
1646	torrentSetQueued( tor, true );
1647	return;
1648	}
1649	break;
1650	}
1651
1652	/* don't allow the torrent to be started if the files disappeared */
1653	if( setLocalErrorIfFilesDisappeared( tor ) )
1654	return;
1655
1656	/* otherwise, start it now... */
1657	tr_sessionLock( tor->session );
1658
1659	/* allow finished torrents to be resumed */
1660	if( tr_torrentIsSeedRatioDone( tor ) ) {
1661	tr_torinf( tor, _( "Restarted manually -- disabling its seed ratio" ) );
1662	tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
1663	}
1664
1665	/* corresponds to the peer_id sent as a tracker request parameter.
1666	* one tracker admin says: "When the same torrent is opened and
1667	* closed and opened again without quitting Transmission ...
1668	* change the peerid. It would help sometimes if a stopped event
1669	* was missed to ensure that we didn't think someone was cheating. */
1670	tr_peerIdInit( tor->peer_id );
1671	tor->isRunning = 1;
1672	tr_torrentSetDirty( tor );
1673	tr_runInEventThread( tor->session, torrentStartImpl, tor );
1674
1675	tr_sessionUnlock( tor->session );
1676	}
1677
1678	void
1679	tr_torrentStart( tr_torrent * tor )
1680	{
1681	if( tr_isTorrent( tor ) )
1682	torrentStart( tor, false );
1683	}
1684
1685	void
1686	tr_torrentStartNow( tr_torrent * tor )
1687	{
1688	if( tr_isTorrent( tor ) )
1689	torrentStart( tor, true );
1690	}
1691
1692	static void
1693	torrentRecheckDoneImpl( void * vtor )
1694	{
1695	tr_torrent * tor = vtor;
1696	assert( tr_isTorrent( tor ) );
1697
1698	tr_torrentRecheckCompleteness( tor );
1699
1700	if( tor->startAfterVerify ) {
1701	tor->startAfterVerify = false;
1702	torrentStart( tor, false );
1703	}
1704	}
1705
1706	static void
1707	torrentRecheckDoneCB( tr_torrent * tor )
1708	{
1709	assert( tr_isTorrent( tor ) );
1710
1711	tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1712	}
1713
1714	static void
1715	verifyTorrent( void * vtor )
1716	{
1717	tr_torrent * tor = vtor;
1718
1719	tr_sessionLock( tor->session );
1720
1721	/* if the torrent's already being verified, stop it */
1722	tr_verifyRemove( tor );
1723
1724	/* if the torrent's running, stop it & set the restart-after-verify flag */
1725	if( tor->startAfterVerify \|\| tor->isRunning ) {
1726	/* don't clobber isStopping */
1727	const bool startAfter = tor->isStopping ? false : true;
1728	tr_torrentStop( tor );
1729	tor->startAfterVerify = startAfter;
1730	}
1731
1732	if( setLocalErrorIfFilesDisappeared( tor ) )
1733	tor->startAfterVerify = false;
1734	else
1735	tr_verifyAdd( tor, torrentRecheckDoneCB );
1736
1737	tr_sessionUnlock( tor->session );
1738	}
1739
1740	void
1741	tr_torrentVerify( tr_torrent * tor )
1742	{
1743	if( tr_isTorrent( tor ) )
1744	tr_runInEventThread( tor->session, verifyTorrent, tor );
1745	}
1746
1747	void
1748	tr_torrentSave( tr_torrent * tor )
1749	{
1750	assert( tr_isTorrent( tor ) );
1751
1752	if( tor->isDirty )
1753	{
1754	tor->isDirty = false;
1755	tr_torrentSaveResume( tor );
1756	}
1757	}
1758
1759	static void
1760	stopTorrent( void * vtor )
1761	{
1762	tr_torrent * tor = vtor;
1763	tr_torinf( tor, "Pausing" );
1764
1765	assert( tr_isTorrent( tor ) );
1766
1767	tr_torrentLock( tor );
1768
1769	tr_verifyRemove( tor );
1770	torrentSetQueued( tor, false );
1771	tr_peerMgrStopTorrent( tor );
1772	tr_announcerTorrentStopped( tor );
1773	tr_cacheFlushTorrent( tor->session->cache, tor );
1774
1775	tr_fdTorrentClose( tor->session, tor->uniqueId );
1776
1777	if( !tor->isDeleting )
1778	tr_torrentSave( tor );
1779
1780	tr_torrentUnlock( tor );
1781	}
1782
1783	void
1784	tr_torrentStop( tr_torrent * tor )
1785	{
1786	assert( tr_isTorrent( tor ) );
1787
1788	if( tr_isTorrent( tor ) )
1789	{
1790	tr_sessionLock( tor->session );
1791
1792	tor->isRunning = 0;
1793	tor->isStopping = 0;
1794	tr_torrentSetDirty( tor );
1795	tr_runInEventThread( tor->session, stopTorrent, tor );
1796
1797	tr_sessionUnlock( tor->session );
1798	}
1799	}
1800
1801	static void
1802	closeTorrent( void * vtor )
1803	{
1804	tr_benc * d;
1805	tr_torrent * tor = vtor;
1806
1807	assert( tr_isTorrent( tor ) );
1808
1809	d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1810	tr_bencDictAddInt( d, "id", tor->uniqueId );
1811	tr_bencDictAddInt( d, "date", tr_time( ) );
1812
1813	tr_torinf( tor, "%s", _( "Removing torrent" ) );
1814
1815	stopTorrent( tor );
1816
1817	if( tor->isDeleting )
1818	{
1819	tr_metainfoRemoveSaved( tor->session, &tor->info );
1820	tr_torrentRemoveResume( tor );
1821	}
1822
1823	tor->isRunning = 0;
1824	freeTorrent( tor );
1825	}
1826
1827	void
1828	tr_torrentFree( tr_torrent * tor )
1829	{
1830	if( tr_isTorrent( tor ) )
1831	{
1832	tr_session * session = tor->session;
1833	assert( tr_isSession( session ) );
1834	tr_sessionLock( session );
1835
1836	tr_torrentClearCompletenessCallback( tor );
1837	tr_runInEventThread( session, closeTorrent, tor );
1838
1839	tr_sessionUnlock( session );
1840	}
1841	}
1842
1843	struct remove_data
1844	{
1845	tr_torrent * tor;
1846	bool deleteFlag;
1847	tr_fileFunc * deleteFunc;
1848	};
1849
1850	static void tr_torrentDeleteLocalData( tr_torrent *, tr_fileFunc );
1851
1852	static void
1853	removeTorrent( void * vdata )
1854	{
1855	struct remove_data * data = vdata;
1856
1857	if( data->deleteFlag )
1858	tr_torrentDeleteLocalData( data->tor, data->deleteFunc );
1859
1860	tr_torrentClearCompletenessCallback( data->tor );
1861	closeTorrent( data->tor );
1862	tr_free( data );
1863	}
1864
1865	void
1866	tr_torrentRemove( tr_torrent * tor,
1867	bool deleteFlag,
1868	tr_fileFunc deleteFunc )
1869	{
1870	struct remove_data * data;
1871
1872	assert( tr_isTorrent( tor ) );
1873	tor->isDeleting = 1;
1874
1875	data = tr_new0( struct remove_data, 1 );
1876	data->tor = tor;
1877	data->deleteFlag = deleteFlag;
1878	data->deleteFunc = deleteFunc;
1879	tr_runInEventThread( tor->session, removeTorrent, data );
1880	}
1881
1882	/**
1883	*** Completeness
1884	**/
1885
1886	static const char *
1887	getCompletionString( int type )
1888	{
1889	switch( type )
1890	{
1891	/* Translators: this is a minor point that's safe to skip over, but FYI:
1892	"Complete" and "Done" are specific, different terms in Transmission:
1893	"Complete" means we've downloaded every file in the torrent.
1894	"Done" means we're done downloading the files we wanted, but NOT all
1895	that exist */
1896	case TR_PARTIAL_SEED:
1897	return _( "Done" );
1898
1899	case TR_SEED:
1900	return _( "Complete" );
1901
1902	default:
1903	return _( "Incomplete" );
1904	}
1905	}
1906
1907	static void
1908	fireCompletenessChange( tr_torrent * tor,
1909	tr_completeness status,
1910	bool wasRunning )
1911	{
1912	assert( ( status == TR_LEECH )
1913	\|\| ( status == TR_SEED )
1914	\|\| ( status == TR_PARTIAL_SEED ) );
1915
1916	if( tor->completeness_func )
1917	tor->completeness_func( tor, status, wasRunning,
1918	tor->completeness_func_user_data );
1919	}
1920
1921	void
1922	tr_torrentSetCompletenessCallback( tr_torrent * tor,
1923	tr_torrent_completeness_func func,
1924	void * user_data )
1925	{
1926	assert( tr_isTorrent( tor ) );
1927
1928	tor->completeness_func = func;
1929	tor->completeness_func_user_data = user_data;
1930	}
1931
1932	void
1933	tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1934	{
1935	tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1936	}
1937
1938	void
1939	tr_torrentSetRatioLimitHitCallback( tr_torrent * tor,
1940	tr_torrent_ratio_limit_hit_func func,
1941	void * user_data )
1942	{
1943	assert( tr_isTorrent( tor ) );
1944
1945	tor->ratio_limit_hit_func = func;
1946	tor->ratio_limit_hit_func_user_data = user_data;
1947	}
1948
1949	void
1950	tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1951	{
1952	tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1953	}
1954
1955	void
1956	tr_torrentSetIdleLimitHitCallback( tr_torrent * tor,
1957	tr_torrent_idle_limit_hit_func func,
1958	void * user_data )
1959	{
1960	assert( tr_isTorrent( tor ) );
1961
1962	tor->idle_limit_hit_func = func;
1963	tor->idle_limit_hit_func_user_data = user_data;
1964	}
1965
1966	void
1967	tr_torrentClearIdleLimitHitCallback( tr_torrent * torrent )
1968	{
1969	tr_torrentSetIdleLimitHitCallback( torrent, NULL, NULL );
1970	}
1971
1972	static void
1973	onSigCHLD( int i UNUSED )
1974	{
1975	waitpid( -1, NULL, WNOHANG );
1976	}
1977
1978	static void
1979	torrentCallScript( const tr_torrent * tor, const char * script )
1980	{
1981	char timeStr[128];
1982	const time_t now = tr_time( );
1983
1984	tr_strlcpy( timeStr, ctime( &now ), sizeof( timeStr ) );
1985	*strchr( timeStr,'\n' ) = '\0';
1986
1987	if( script && *script )
1988	{
1989	int i;
1990	char * cmd[] = { tr_strdup( script ), NULL };
1991	char * env[] = {
1992	tr_strdup_printf( "TR_APP_VERSION=%s", SHORT_VERSION_STRING ),
1993	tr_strdup_printf( "TR_TIME_LOCALTIME=%s", timeStr ),
1994	tr_strdup_printf( "TR_TORRENT_DIR=%s", tor->currentDir ),
1995	tr_strdup_printf( "TR_TORRENT_ID=%d", tr_torrentId( tor ) ),
1996	tr_strdup_printf( "TR_TORRENT_HASH=%s", tor->info.hashString ),
1997	tr_strdup_printf( "TR_TORRENT_NAME=%s", tr_torrentName( tor ) ),
1998	NULL };
1999
2000	tr_torinf( tor, "Calling script \"%s\"", script );
2001
2002	#ifdef WIN32
2003	_spawnvpe( _P_NOWAIT, script, (const char*)cmd, env );
2004	#else
2005	signal( SIGCHLD, onSigCHLD );
2006
2007	if( !fork( ) )
2008	{
2009	for (i=0; env[i]; ++i)
2010	putenv(env[i]);
2011	execvp( script, cmd );
2012	_exit( 0 );
2013	}
2014	#endif
2015
2016	for( i=0; cmd[i]; ++i ) tr_free( cmd[i] );
2017	for( i=0; env[i]; ++i ) tr_free( env[i] );
2018	}
2019	}
2020
2021	void
2022	tr_torrentRecheckCompleteness( tr_torrent * tor )
2023	{
2024	tr_completeness completeness;
2025
2026	assert( tr_isTorrent( tor ) );
2027
2028	tr_torrentLock( tor );
2029
2030	completeness = tr_cpGetStatus( &tor->completion );
2031
2032	if( completeness != tor->completeness )
2033	{
2034	const int recentChange = tor->downloadedCur != 0;
2035	const bool wasLeeching = !tr_torrentIsSeed( tor );
2036	const bool wasRunning = tor->isRunning;
2037
2038	if( recentChange )
2039	{
2040	tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
2041	getCompletionString( tor->completeness ),
2042	getCompletionString( completeness ) );
2043	}
2044
2045	tor->completeness = completeness;
2046	tr_fdTorrentClose( tor->session, tor->uniqueId );
2047
2048	if( tr_torrentIsSeed( tor ) )
2049	{
2050	if( recentChange )
2051	{
2052	tr_announcerTorrentCompleted( tor );
2053	tor->doneDate = tor->anyDate = tr_time( );
2054	}
2055
2056	if( wasLeeching && wasRunning )
2057	{
2058	/* clear interested flag on all peers */
2059	tr_peerMgrClearInterest( tor );
2060
2061	/* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
2062	tr_torrentCheckSeedLimit( tor );
2063	}
2064
2065	if( tor->currentDir == tor->incompleteDir )
2066	tr_torrentSetLocation( tor, tor->downloadDir, true, NULL, NULL );
2067
2068	if( tr_sessionIsTorrentDoneScriptEnabled( tor->session ) )
2069	torrentCallScript( tor, tr_sessionGetTorrentDoneScript( tor->session ) );
2070	}
2071
2072	fireCompletenessChange( tor, completeness, wasRunning );
2073
2074	tr_torrentSetDirty( tor );
2075	}
2076
2077	tr_torrentUnlock( tor );
2078	}
2079
2080	/***
2081	****
2082	***/
2083
2084	static void
2085	tr_torrentFireMetadataCompleted( tr_torrent * tor )
2086	{
2087	assert( tr_isTorrent( tor ) );
2088
2089	if( tor->metadata_func )
2090	tor->metadata_func( tor, tor->metadata_func_user_data );
2091	}
2092
2093	void
2094	tr_torrentSetMetadataCallback( tr_torrent * tor,
2095	tr_torrent_metadata_func func,
2096	void * user_data )
2097	{
2098	assert( tr_isTorrent( tor ) );
2099
2100	tor->metadata_func = func;
2101	tor->metadata_func_user_data = user_data;
2102	}
2103
2104
2105	/**
2106	*** File priorities
2107	**/
2108
2109	void
2110	tr_torrentInitFilePriority( tr_torrent * tor,
2111	tr_file_index_t fileIndex,
2112	tr_priority_t priority )
2113	{
2114	tr_piece_index_t i;
2115	tr_file * file;
2116
2117	assert( tr_isTorrent( tor ) );
2118	assert( fileIndex < tor->info.fileCount );
2119	assert( tr_isPriority( priority ) );
2120
2121	file = &tor->info.files[fileIndex];
2122	file->priority = priority;
2123	for( i = file->firstPiece; i <= file->lastPiece; ++i )
2124	tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
2125	}
2126
2127	void
2128	tr_torrentSetFilePriorities( tr_torrent * tor,
2129	const tr_file_index_t * files,
2130	tr_file_index_t fileCount,
2131	tr_priority_t priority )
2132	{
2133	tr_file_index_t i;
2134	assert( tr_isTorrent( tor ) );
2135	tr_torrentLock( tor );
2136
2137	for( i = 0; i < fileCount; ++i )
2138	if( files[i] < tor->info.fileCount )
2139	tr_torrentInitFilePriority( tor, files[i], priority );
2140	tr_torrentSetDirty( tor );
2141	tr_peerMgrRebuildRequests( tor );
2142
2143	tr_torrentUnlock( tor );
2144	}
2145
2146	tr_priority_t*
2147	tr_torrentGetFilePriorities( const tr_torrent * tor )
2148	{
2149	tr_file_index_t i;
2150	tr_priority_t * p;
2151
2152	assert( tr_isTorrent( tor ) );
2153
2154	tr_torrentLock( tor );
2155	p = tr_new0( tr_priority_t, tor->info.fileCount );
2156	for( i = 0; i < tor->info.fileCount; ++i )
2157	p[i] = tor->info.files[i].priority;
2158	tr_torrentUnlock( tor );
2159
2160	return p;
2161	}
2162
2163	/**
2164	*** File DND
2165	**/
2166
2167	static void
2168	setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
2169	{
2170	const int8_t dnd = !doDownload;
2171	tr_piece_index_t firstPiece;
2172	int8_t firstPieceDND;
2173	tr_piece_index_t lastPiece;
2174	int8_t lastPieceDND;
2175	tr_file_index_t i;
2176	tr_file * file = &tor->info.files[fileIndex];
2177
2178	file->dnd = dnd;
2179	firstPiece = file->firstPiece;
2180	lastPiece = file->lastPiece;
2181
2182	/* can't set the first piece to DND unless
2183	every file using that piece is DND */
2184	firstPieceDND = dnd;
2185	if( fileIndex > 0 )
2186	{
2187	for( i = fileIndex - 1; firstPieceDND; --i )
2188	{
2189	if( tor->info.files[i].lastPiece != firstPiece )
2190	break;
2191	firstPieceDND = tor->info.files[i].dnd;
2192	if( !i )
2193	break;
2194	}
2195	}
2196
2197	/* can't set the last piece to DND unless
2198	every file using that piece is DND */
2199	lastPieceDND = dnd;
2200	for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
2201	{
2202	if( tor->info.files[i].firstPiece != lastPiece )
2203	break;
2204	lastPieceDND = tor->info.files[i].dnd;
2205	}
2206
2207	if( firstPiece == lastPiece )
2208	{
2209	tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
2210	}
2211	else
2212	{
2213	tr_piece_index_t pp;
2214	tor->info.pieces[firstPiece].dnd = firstPieceDND;
2215	tor->info.pieces[lastPiece].dnd = lastPieceDND;
2216	for( pp = firstPiece + 1; pp < lastPiece; ++pp )
2217	tor->info.pieces[pp].dnd = dnd;
2218	}
2219	}
2220
2221	void
2222	tr_torrentInitFileDLs( tr_torrent * tor,
2223	const tr_file_index_t * files,
2224	tr_file_index_t fileCount,
2225	bool doDownload )
2226	{
2227	tr_file_index_t i;
2228
2229	assert( tr_isTorrent( tor ) );
2230
2231	tr_torrentLock( tor );
2232
2233	for( i=0; i<fileCount; ++i )
2234	if( files[i] < tor->info.fileCount )
2235	setFileDND( tor, files[i], doDownload );
2236
2237	tr_cpInvalidateDND( &tor->completion );
2238
2239	tr_torrentUnlock( tor );
2240	}
2241
2242	void
2243	tr_torrentSetFileDLs( tr_torrent * tor,
2244	const tr_file_index_t * files,
2245	tr_file_index_t fileCount,
2246	bool doDownload )
2247	{
2248	assert( tr_isTorrent( tor ) );
2249	tr_torrentLock( tor );
2250
2251	tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
2252	tr_torrentSetDirty( tor );
2253	tr_peerMgrRebuildRequests( tor );
2254
2255	tr_torrentUnlock( tor );
2256	}
2257
2258	/***
2259	****
2260	***/
2261
2262	tr_priority_t
2263	tr_torrentGetPriority( const tr_torrent * tor )
2264	{
2265	assert( tr_isTorrent( tor ) );
2266
2267	return tor->bandwidth.priority;
2268	}
2269
2270	void
2271	tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
2272	{
2273	assert( tr_isTorrent( tor ) );
2274	assert( tr_isPriority( priority ) );
2275
2276	if( tor->bandwidth.priority != priority )
2277	{
2278	tor->bandwidth.priority = priority;
2279
2280	tr_torrentSetDirty( tor );
2281	}
2282	}
2283
2284	/***
2285	****
2286	***/
2287
2288	void
2289	tr_torrentSetPeerLimit( tr_torrent * tor,
2290	uint16_t maxConnectedPeers )
2291	{
2292	assert( tr_isTorrent( tor ) );
2293
2294	if ( tor->maxConnectedPeers != maxConnectedPeers )
2295	{
2296	tor->maxConnectedPeers = maxConnectedPeers;
2297
2298	tr_torrentSetDirty( tor );
2299	}
2300	}
2301
2302	uint16_t
2303	tr_torrentGetPeerLimit( const tr_torrent * tor )
2304	{
2305	assert( tr_isTorrent( tor ) );
2306
2307	return tor->maxConnectedPeers;
2308	}
2309
2310	/***
2311	****
2312	***/
2313
2314	void
2315	tr_torrentGetBlockLocation( const tr_torrent * tor,
2316	tr_block_index_t block,
2317	tr_piece_index_t * piece,
2318	uint32_t * offset,
2319	uint32_t * length )
2320	{
2321	uint64_t pos = block;
2322	pos *= tor->blockSize;
2323	*piece = pos / tor->info.pieceSize;
2324	offset = pos - ( piece * tor->info.pieceSize );
2325	*length = tr_torBlockCountBytes( tor, block );
2326	}
2327
2328
2329	tr_block_index_t
2330	_tr_block( const tr_torrent * tor,
2331	tr_piece_index_t index,
2332	uint32_t offset )
2333	{
2334	tr_block_index_t ret;
2335
2336	assert( tr_isTorrent( tor ) );
2337
2338	ret = index;
2339	ret *= ( tor->info.pieceSize / tor->blockSize );
2340	ret += offset / tor->blockSize;
2341	return ret;
2342	}
2343
2344	bool
2345	tr_torrentReqIsValid( const tr_torrent * tor,
2346	tr_piece_index_t index,
2347	uint32_t offset,
2348	uint32_t length )
2349	{
2350	int err = 0;
2351
2352	assert( tr_isTorrent( tor ) );
2353
2354	if( index >= tor->info.pieceCount )
2355	err = 1;
2356	else if( length < 1 )
2357	err = 2;
2358	else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
2359	err = 3;
2360	else if( length > MAX_BLOCK_SIZE )
2361	err = 4;
2362	else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
2363	err = 5;
2364
2365	if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
2366	(unsigned long)index,
2367	(unsigned long)offset,
2368	(unsigned long)length,
2369	err );
2370
2371	return !err;
2372	}
2373
2374	uint64_t
2375	tr_pieceOffset( const tr_torrent * tor,
2376	tr_piece_index_t index,
2377	uint32_t offset,
2378	uint32_t length )
2379	{
2380	uint64_t ret;
2381
2382	assert( tr_isTorrent( tor ) );
2383
2384	ret = tor->info.pieceSize;
2385	ret *= index;
2386	ret += offset;
2387	ret += length;
2388	return ret;
2389	}
2390
2391	void
2392	tr_torGetFileBlockRange( const tr_torrent * tor,
2393	const tr_file_index_t file,
2394	tr_block_index_t * first,
2395	tr_block_index_t * last )
2396	{
2397	const tr_file * f = &tor->info.files[file];
2398	uint64_t offset = f->offset;
2399	*first = offset / tor->blockSize;
2400	if( !f->length )
2401	last = first;
2402	else {
2403	offset += f->length - 1;
2404	*last = offset / tor->blockSize;
2405	}
2406	}
2407
2408	void
2409	tr_torGetPieceBlockRange( const tr_torrent * tor,
2410	const tr_piece_index_t piece,
2411	tr_block_index_t * first,
2412	tr_block_index_t * last )
2413	{
2414	uint64_t offset = tor->info.pieceSize;
2415	offset *= piece;
2416	*first = offset / tor->blockSize;
2417	offset += ( tr_torPieceCountBytes( tor, piece ) - 1 );
2418	*last = offset / tor->blockSize;
2419	}
2420
2421
2422	/***
2423	****
2424	***/
2425
2426	void
2427	tr_torrentSetPieceChecked( tr_torrent * tor, tr_piece_index_t pieceIndex )
2428	{
2429	assert( tr_isTorrent( tor ) );
2430	assert( pieceIndex < tor->info.pieceCount );
2431
2432	tor->info.pieces[pieceIndex].timeChecked = tr_time( );
2433	}
2434
2435	void
2436	tr_torrentSetChecked( tr_torrent * tor, time_t when )
2437	{
2438	tr_piece_index_t i, n;
2439
2440	assert( tr_isTorrent( tor ) );
2441
2442	for( i=0, n=tor->info.pieceCount; i!=n; ++i )
2443	tor->info.pieces[i].timeChecked = when;
2444	}
2445
2446	bool
2447	tr_torrentCheckPiece( tr_torrent * tor, tr_piece_index_t pieceIndex )
2448	{
2449	const bool pass = tr_ioTestPiece( tor, pieceIndex );
2450
2451	tr_deeplog_tor( tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass );
2452	tr_torrentSetHasPiece( tor, pieceIndex, pass );
2453	tr_torrentSetPieceChecked( tor, pieceIndex );
2454	tor->anyDate = tr_time( );
2455	tr_torrentSetDirty( tor );
2456
2457	return pass;
2458	}
2459
2460	time_t
2461	tr_torrentGetFileMTime( const tr_torrent * tor, tr_file_index_t i )
2462	{
2463	time_t mtime = 0;
2464	if( !tr_fdFileGetCachedMTime( tor->session, tor->uniqueId, i, &mtime ) )
2465	tr_torrentFindFile2( tor, i, NULL, NULL, &mtime );
2466	return mtime;
2467	}
2468
2469	bool
2470	tr_torrentPieceNeedsCheck( const tr_torrent * tor, tr_piece_index_t p )
2471	{
2472	uint64_t unused;
2473	tr_file_index_t f;
2474	const tr_info * inf = tr_torrentInfo( tor );
2475
2476	/* if we've never checked this piece, then it needs to be checked */
2477	if( !inf->pieces[p].timeChecked )
2478	return true;
2479
2480	/* If we think we've completed one of the files in this piece,
2481	* but it's been modified since we last checked it,
2482	* then it needs to be rechecked */
2483	tr_ioFindFileLocation( tor, p, 0, &f, &unused );
2484	for( ; f < inf->fileCount && pieceHasFile( p, &inf->files[f] ); ++f )
2485	if( tr_cpFileIsComplete( &tor->completion, f ) )
2486	if( tr_torrentGetFileMTime( tor, f ) > inf->pieces[p].timeChecked )
2487	return true;
2488
2489	return false;
2490	}
2491
2492	/***
2493	****
2494	***/
2495
2496	static int
2497	compareTrackerByTier( const void * va, const void * vb )
2498	{
2499	const tr_tracker_info * a = va;
2500	const tr_tracker_info * b = vb;
2501
2502	/* sort by tier */
2503	if( a->tier != b->tier )
2504	return a->tier - b->tier;
2505
2506	/* get the effects of a stable sort by comparing the two elements' addresses */
2507	return a - b;
2508	}
2509
2510	bool
2511	tr_torrentSetAnnounceList( tr_torrent * tor,
2512	const tr_tracker_info * trackers_in,
2513	int trackerCount )
2514	{
2515	int i;
2516	tr_benc metainfo;
2517	bool ok = true;
2518	tr_tracker_info * trackers;
2519
2520	tr_torrentLock( tor );
2521
2522	assert( tr_isTorrent( tor ) );
2523
2524	/* ensure the trackers' tiers are in ascending order */
2525	trackers = tr_memdup( trackers_in, sizeof( tr_tracker_info ) * trackerCount );
2526	qsort( trackers, trackerCount, sizeof( tr_tracker_info ), compareTrackerByTier );
2527
2528	/* look for bad URLs */
2529	for( i=0; ok && i<trackerCount; ++i )
2530	if( !tr_urlIsValidTracker( trackers[i].announce ) )
2531	ok = false;
2532
2533	/* save to the .torrent file */
2534	if( ok && !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2535	{
2536	bool hasInfo;
2537	tr_info tmpInfo;
2538
2539	/* remove the old fields */
2540	tr_bencDictRemove( &metainfo, "announce" );
2541	tr_bencDictRemove( &metainfo, "announce-list" );
2542
2543	/* add the new fields */
2544	if( trackerCount > 0 )
2545	{
2546	tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2547	}
2548	if( trackerCount > 1 )
2549	{
2550	int i;
2551	int prevTier = -1;
2552	tr_benc * tier = NULL;
2553	tr_benc * announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2554
2555	for( i=0; i<trackerCount; ++i ) {
2556	if( prevTier != trackers[i].tier ) {
2557	prevTier = trackers[i].tier;
2558	tier = tr_bencListAddList( announceList, 0 );
2559	}
2560	tr_bencListAddStr( tier, trackers[i].announce );
2561	}
2562	}
2563
2564	/* try to parse it back again, to make sure it's good */
2565	memset( &tmpInfo, 0, sizeof( tr_info ) );
2566	if( tr_metainfoParse( tor->session, &metainfo, &tmpInfo,
2567	&hasInfo, &tor->infoDictLength ) )
2568	{
2569	/* it's good, so keep these new trackers and free the old ones */
2570
2571	tr_info swap;
2572	swap.trackers = tor->info.trackers;
2573	swap.trackerCount = tor->info.trackerCount;
2574	tor->info.trackers = tmpInfo.trackers;
2575	tor->info.trackerCount = tmpInfo.trackerCount;
2576	tmpInfo.trackers = swap.trackers;
2577	tmpInfo.trackerCount = swap.trackerCount;
2578
2579	tr_metainfoFree( &tmpInfo );
2580	tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2581	}
2582
2583	/* cleanup */
2584	tr_bencFree( &metainfo );
2585
2586	/* if we had a tracker-related error on this torrent,
2587	* and that tracker's been removed,
2588	* then clear the error */
2589	if( ( tor->error == TR_STAT_TRACKER_WARNING )
2590	\|\| ( tor->error == TR_STAT_TRACKER_ERROR ) )
2591	{
2592	bool clear = true;
2593
2594	for( i=0; clear && i<trackerCount; ++i )
2595	if( !strcmp( trackers[i].announce, tor->errorTracker ) )
2596	clear = false;
2597
2598	if( clear )
2599	tr_torrentClearError( tor );
2600	}
2601
2602	/* tell the announcer to reload this torrent's tracker list */
2603	tr_announcerResetTorrent( tor->session->announcer, tor );
2604	}
2605
2606	tr_torrentUnlock( tor );
2607
2608	tr_free( trackers );
2609	return ok;
2610	}
2611
2612	/**
2613	***
2614	**/
2615
2616	void
2617	tr_torrentSetAddedDate( tr_torrent * tor,
2618	time_t t )
2619	{
2620	assert( tr_isTorrent( tor ) );
2621
2622	tor->addedDate = t;
2623	tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2624	}
2625
2626	void
2627	tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2628	{
2629	assert( tr_isTorrent( tor ) );
2630
2631	tor->activityDate = t;
2632	tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2633	}
2634
2635	void
2636	tr_torrentSetDoneDate( tr_torrent * tor,
2637	time_t t )
2638	{
2639	assert( tr_isTorrent( tor ) );
2640
2641	tor->doneDate = t;
2642	tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2643	}
2644
2645	/**
2646	***
2647	**/
2648
2649	uint64_t
2650	tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2651	{
2652	tr_file_index_t i;
2653	uint64_t bytesLeft = 0;
2654
2655	assert( tr_isTorrent( tor ) );
2656
2657	for( i=0; i<tor->info.fileCount; ++i )
2658	{
2659	if( !tor->info.files[i].dnd )
2660	{
2661	struct stat sb;
2662	const uint64_t length = tor->info.files[i].length;
2663	char * path = tr_torrentFindFile( tor, i );
2664
2665	bytesLeft += length;
2666
2667	if( ( path != NULL ) && !stat( path, &sb )
2668	&& S_ISREG( sb.st_mode )
2669	&& ( (uint64_t)sb.st_size <= length ) )
2670	bytesLeft -= sb.st_size;
2671
2672	tr_free( path );
2673	}
2674	}
2675
2676	return bytesLeft;
2677	}
2678
2679	/****
2680	***** Removing the torrent's local data
2681	****/
2682
2683	static bool
2684	isJunkFile( const char * base )
2685	{
2686	int i;
2687	static const char * files[] = { ".DS_Store", "desktop.ini", "Thumbs.db" };
2688	static const int file_count = sizeof(files) / sizeof(files[0]);
2689
2690	for( i=0; i<file_count; ++i )
2691	if( !strcmp( base, files[i] ) )
2692	return true;
2693
2694	#ifdef SYS_DARWIN
2695	/* check for resource forks. <http://support.apple.com/kb/TA20578> */
2696	if( !memcmp( base, "._", 2 ) )
2697	return true;
2698	#endif
2699
2700	return false;
2701	}
2702
2703	static void
2704	removeEmptyFoldersAndJunkFiles( const char * folder )
2705	{
2706	DIR * odir;
2707	if(( odir = opendir( folder ))) {
2708	struct dirent * d;
2709	while(( d = readdir( odir ))) {
2710	if( strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) ) {
2711	struct stat sb;
2712	char * filename = tr_buildPath( folder, d->d_name, NULL );
2713	if( !stat( filename, &sb ) && S_ISDIR( sb.st_mode ) )
2714	removeEmptyFoldersAndJunkFiles( filename );
2715	else if( isJunkFile( d->d_name ) )
2716	remove( filename );
2717	tr_free( filename );
2718	}
2719	}
2720	remove( folder );
2721	closedir( odir );
2722	}
2723	}
2724
2725	static bool fileExists( const char * filename, time_t * optional_mtime );
2726
2727	/**
2728	* This convoluted code does something (seemingly) simple:
2729	* remove the torrent's local files.
2730	*
2731	* Fun complications:
2732	* 1. Try to preserve the directory hierarchy in the recycle bin.
2733	* 2. If there are nontorrent files, don't delete them...
2734	* 3. ...unless the other files are "junk", such as .DS_Store
2735	*/
2736	static void
2737	deleteLocalData( tr_torrent * tor, tr_fileFunc func )
2738	{
2739	int i, n;
2740	tr_file_index_t f;
2741	char * base;
2742	DIR * odir;
2743	char * tmpdir = NULL;
2744	tr_ptrArray files = TR_PTR_ARRAY_INIT;
2745	tr_ptrArray folders = TR_PTR_ARRAY_INIT;
2746	const void * const vstrcmp = strcmp;
2747	const char * const top = tor->currentDir;
2748
2749	/* if it's a magnet link, there's nothing to move... */
2750	if( !tr_torrentHasMetadata( tor ) )
2751	return;
2752
2753	/***
2754	**** Move the local data to a new tmpdir
2755	***/
2756
2757	base = tr_strdup_printf( "%s__XXXXXX", tr_torrentName( tor ) );
2758	tmpdir = tr_buildPath( top, base, NULL );
2759	mkdtemp( tmpdir );
2760	tr_free( base );
2761
2762	for( f=0; f<tor->info.fileCount; ++f )
2763	{
2764	char * filename = tr_buildPath( top, tor->info.files[f].name, NULL );
2765	if( !fileExists( filename, NULL ) ) {
2766	char * partial = tr_torrentBuildPartial( tor, f );
2767	tr_free( filename );
2768	filename = tr_buildPath( top, partial, NULL );
2769	tr_free( partial );
2770	if( !fileExists( filename, NULL ) ) {
2771	tr_free( filename );
2772	filename = NULL;
2773	}
2774	}
2775
2776	if( filename != NULL )
2777	{
2778	char * target = tr_buildPath( tmpdir, tor->info.files[f].name, NULL );
2779	char * target_dir = tr_dirname( target );
2780	tr_mkdirp( target_dir, 0777 );
2781	rename( filename, target );
2782	tr_ptrArrayAppend( &files, target );
2783	tr_free( target_dir );
2784	tr_free( filename );
2785	}
2786	}
2787
2788	/***
2789	**** Remove tmpdir.
2790	****
2791	**** Try deleting the top-level files & folders to preserve
2792	**** the directory hierarchy in the recycle bin.
2793	**** If case that fails -- for example, rmdir() doesn't
2794	**** delete nonempty folders -- go from the bottom up too.
2795	***/
2796
2797	/* try deleting the local data's top-level files & folders */
2798	if(( odir = opendir( tmpdir )))
2799	{
2800	struct dirent * d;
2801	while(( d = readdir( odir )))
2802	{
2803	if( strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) )
2804	{
2805	char * file = tr_buildPath( tmpdir, d->d_name, NULL );
2806	func( file );
2807	tr_free( file );
2808	}
2809	}
2810	closedir( odir );
2811	}
2812
2813	/* go from the bottom up */
2814	for( i=0, n=tr_ptrArraySize(&files); i<n; ++i )
2815	{
2816	char * walk = tr_strdup( tr_ptrArrayNth( &files, i ) );
2817	while( fileExists( walk, NULL ) && !tr_is_same_file( tmpdir, walk ) )
2818	{
2819	char * tmp = tr_dirname( walk );
2820	func( walk );
2821	tr_free( walk );
2822	walk = tmp;
2823	}
2824	tr_free( walk );
2825	}
2826
2827	/***
2828	**** The local data has been removed.
2829	**** What's left in top are empty folders, junk, and user-generated files.
2830	**** Remove the first two categories and leave the third.
2831	***/
2832
2833	/* build a list of 'top's child directories that belong to this torrent */
2834	for( f=0; f<tor->info.fileCount; ++f )
2835	{
2836	char * dir;
2837	char * filename;
2838
2839	/* get the directory that this file goes in... */
2840	filename = tr_buildPath( top, tor->info.files[f].name, NULL );
2841	dir = tr_dirname( filename );
2842	tr_free( filename );
2843	if( !tr_is_same_file( top, dir ) && strcmp( top, dir ) ) {
2844	for( ;; ) {
2845	char * parent = tr_dirname( dir );
2846	if( tr_is_same_file( top, parent ) \|\| !strcmp( top, parent ) ) {
2847	if( tr_ptrArrayFindSorted( &folders, dir, vstrcmp ) == NULL ) {
2848	tr_ptrArrayInsertSorted( &folders, tr_strdup( dir ), vstrcmp );
2849	}
2850	break;
2851	}
2852	tr_free( dir );
2853	dir = parent;
2854	}
2855	}
2856	}
2857	for( i=0, n=tr_ptrArraySize(&folders); i<n; ++i )
2858	removeEmptyFoldersAndJunkFiles( tr_ptrArrayNth( &folders, i ) );
2859
2860	/* cleanup */
2861	rmdir( tmpdir );
2862	tr_free( tmpdir );
2863	tr_ptrArrayDestruct( &folders, tr_free );
2864	tr_ptrArrayDestruct( &files, tr_free );
2865	}
2866
2867	static void
2868	tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc func )
2869	{
2870	assert( tr_isTorrent( tor ) );
2871
2872	if( func == NULL )
2873	func = remove;
2874
2875	/* close all the files because we're about to delete them */
2876	tr_cacheFlushTorrent( tor->session->cache, tor );
2877	tr_fdTorrentClose( tor->session, tor->uniqueId );
2878
2879	deleteLocalData( tor, func );
2880	}
2881
2882	/***
2883	****
2884	***/
2885
2886	struct LocationData
2887	{
2888	bool move_from_old_location;
2889	volatile int * setme_state;
2890	volatile double * setme_progress;
2891	char * location;
2892	tr_torrent * tor;
2893	};
2894
2895	static void
2896	setLocation( void * vdata )
2897	{
2898	bool err = false;
2899	struct LocationData * data = vdata;
2900	tr_torrent * tor = data->tor;
2901	const bool do_move = data->move_from_old_location;
2902	const char * location = data->location;
2903	double bytesHandled = 0;
2904
2905	assert( tr_isTorrent( tor ) );
2906
2907	tr_dbg( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
2908	tr_torrentName(tor), tor->currentDir, location );
2909
2910	tr_mkdirp( location, 0777 );
2911
2912	if( !tr_is_same_file( location, tor->currentDir ) )
2913	{
2914	tr_file_index_t i;
2915
2916	/* bad idea to move files while they're being verified... */
2917	tr_verifyRemove( tor );
2918
2919	/* try to move the files.
2920	* FIXME: there are still all kinds of nasty cases, like what
2921	* if the target directory runs out of space halfway through... */
2922	for( i=0; !err && i<tor->info.fileCount; ++i )
2923	{
2924	const tr_file * f = &tor->info.files[i];
2925	const char * oldbase;
2926	char * sub;
2927	if( tr_torrentFindFile2( tor, i, &oldbase, &sub, NULL ) )
2928	{
2929	char * oldpath = tr_buildPath( oldbase, sub, NULL );
2930	char * newpath = tr_buildPath( location, sub, NULL );
2931
2932	tr_dbg( "Found file #%d: %s", (int)i, oldpath );
2933
2934	if( do_move && !tr_is_same_file( oldpath, newpath ) )
2935	{
2936	bool renamed = false;
2937	errno = 0;
2938	tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2939	if( tr_moveFile( oldpath, newpath, &renamed ) )
2940	{
2941	err = true;
2942	tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2943	oldpath, newpath, tr_strerror( errno ) );
2944	}
2945	}
2946
2947	tr_free( newpath );
2948	tr_free( oldpath );
2949	tr_free( sub );
2950	}
2951
2952	if( data->setme_progress )
2953	{
2954	bytesHandled += f->length;
2955	*data->setme_progress = bytesHandled / tor->info.totalSize;
2956	}
2957	}
2958
2959	if( !err )
2960	{
2961	/* blow away the leftover subdirectories in the old location */
2962	if( do_move )
2963	tr_torrentDeleteLocalData( tor, remove );
2964
2965	/* set the new location and reverify */
2966	tr_torrentSetDownloadDir( tor, location );
2967	}
2968	}
2969
2970	if( !err && do_move )
2971	{
2972	tr_free( tor->incompleteDir );
2973	tor->incompleteDir = NULL;
2974	tor->currentDir = tor->downloadDir;
2975	}
2976
2977	if( data->setme_state )
2978	*data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2979
2980	/* cleanup */
2981	tr_free( data->location );
2982	tr_free( data );
2983	}
2984
2985	void
2986	tr_torrentSetLocation( tr_torrent * tor,
2987	const char * location,
2988	bool move_from_old_location,
2989	volatile double * setme_progress,
2990	volatile int * setme_state )
2991	{
2992	struct LocationData * data;
2993
2994	assert( tr_isTorrent( tor ) );
2995
2996	if( setme_state )
2997	*setme_state = TR_LOC_MOVING;
2998	if( setme_progress )
2999	*setme_progress = 0;
3000
3001	/* run this in the libtransmission thread */
3002	data = tr_new( struct LocationData, 1 );
3003	data->tor = tor;
3004	data->location = tr_strdup( location );
3005	data->move_from_old_location = move_from_old_location;
3006	data->setme_state = setme_state;
3007	data->setme_progress = setme_progress;
3008	tr_runInEventThread( tor->session, setLocation, data );
3009	}
3010
3011	/***
3012	****
3013	***/
3014
3015	void
3016	tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
3017	{
3018	char * sub;
3019	const char * base;
3020	const tr_info * inf = &tor->info;
3021	const tr_file * f = &inf->files[fileNum];
3022	tr_piece * p;
3023	const tr_piece * pend;
3024	const time_t now = tr_time( );
3025
3026	/* close the file so that we can reopen in read-only mode as needed */
3027	tr_fdFileClose( tor->session, tor, fileNum );
3028
3029	/* now that the file is complete and closed, we can start watching its
3030	* mtime timestamp for changes to know if we need to reverify pieces */
3031	for( p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p )
3032	p->timeChecked = now;
3033
3034	/* if the torrent's current filename isn't the same as the one in the
3035	* metadata -- for example, if it had the ".part" suffix appended to
3036	* it until now -- then rename it to match the one in the metadata */
3037	if( tr_torrentFindFile2( tor, fileNum, &base, &sub, NULL ) )
3038	{
3039	if( strcmp( sub, f->name ) )
3040	{
3041	char * oldpath = tr_buildPath( base, sub, NULL );
3042	char * newpath = tr_buildPath( base, f->name, NULL );
3043
3044	if( rename( oldpath, newpath ) )
3045	tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
3046
3047	tr_free( newpath );
3048	tr_free( oldpath );
3049	}
3050
3051	tr_free( sub );
3052	}
3053	}
3054
3055	/***
3056	****
3057	***/
3058
3059	#ifdef SYS_DARWIN
3060	#define TR_STAT_MTIME(sb) ((sb).st_mtimespec.tv_sec)
3061	#else
3062	#define TR_STAT_MTIME(sb) ((sb).st_mtime)
3063	#endif
3064
3065
3066	static bool
3067	fileExists( const char * filename, time_t * mtime )
3068	{
3069	struct stat sb;
3070	const bool ok = !stat( filename, &sb );
3071
3072	if( ok && ( mtime != NULL ) )
3073	*mtime = TR_STAT_MTIME( sb );
3074
3075	return ok;
3076	}
3077
3078	bool
3079	tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
3080	const char base, char subpath, time_t * mtime )
3081	{
3082	char * part = NULL;
3083	const tr_file * file;
3084	const char * b = NULL;
3085	const char * s = NULL;
3086
3087	assert( tr_isTorrent( tor ) );
3088	assert( fileNum < tor->info.fileCount );
3089
3090	file = &tor->info.files[fileNum];
3091
3092	if( b == NULL ) {
3093	char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
3094	if( fileExists( filename, mtime ) ) {
3095	b = tor->downloadDir;
3096	s = file->name;
3097	}
3098	tr_free( filename );
3099	}
3100
3101	if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3102	char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
3103	if( fileExists( filename, mtime ) ) {
3104	b = tor->incompleteDir;
3105	s = file->name;
3106	}
3107	tr_free( filename );
3108	}
3109
3110	if( b == NULL )
3111	part = tr_torrentBuildPartial( tor, fileNum );
3112
3113	if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3114	char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
3115	if( fileExists( filename, mtime ) ) {
3116	b = tor->incompleteDir;
3117	s = part;
3118	}
3119	tr_free( filename );
3120	}
3121
3122	if( b == NULL) {
3123	char * filename = tr_buildPath( tor->downloadDir, part, NULL );
3124	if( fileExists( filename, mtime ) ) {
3125	b = tor->downloadDir;
3126	s = part;
3127	}
3128	tr_free( filename );
3129	}
3130
3131	if( base != NULL )
3132	*base = b;
3133	if( subpath != NULL )
3134	*subpath = tr_strdup( s );
3135
3136	tr_free( part );
3137	return b != NULL;
3138	}
3139
3140	char*
3141	tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
3142	{
3143	char * subpath;
3144	char * ret = NULL;
3145	const char * base;
3146
3147	if( tr_torrentFindFile2( tor, fileNum, &base, &subpath, NULL ) )
3148	{
3149	ret = tr_buildPath( base, subpath, NULL );
3150	tr_free( subpath );
3151	}
3152
3153	return ret;
3154	}
3155
3156	/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
3157	static void
3158	refreshCurrentDir( tr_torrent * tor )
3159	{
3160	const char * dir = NULL;
3161
3162	if( tor->incompleteDir == NULL )
3163	dir = tor->downloadDir;
3164	else if( !tr_torrentHasMetadata( tor ) ) /* no files to find */
3165	dir = tor->incompleteDir;
3166	else if( !tr_torrentFindFile2( tor, 0, &dir, NULL, NULL ) )
3167	dir = tor->incompleteDir;
3168
3169	assert( dir != NULL );
3170	assert( ( dir == tor->downloadDir ) \|\| ( dir == tor->incompleteDir ) );
3171	tor->currentDir = dir;
3172	}
3173
3174	char*
3175	tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
3176	{
3177	return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
3178	}
3179
3180	/***
3181	****
3182	***/
3183
3184	static int
3185	compareTorrentByQueuePosition( const void * va, const void * vb )
3186	{
3187	const tr_torrent * a = * (const tr_torrent **) va;
3188	const tr_torrent * b = * (const tr_torrent **) vb;
3189
3190	return a->queuePosition - b->queuePosition;
3191	}
3192
3193	#ifndef NDEBUG
3194	static bool
3195	queueIsSequenced( tr_session * session )
3196	{
3197	int i ;
3198	int n ;
3199	bool is_sequenced = true;
3200	tr_torrent * tor;
3201	tr_torrent ** tmp = tr_new( tr_torrent *, session->torrentCount );
3202
3203	/* get all the torrents */
3204	n = 0;
3205	tor = NULL;
3206	while(( tor = tr_torrentNext( session, tor )))
3207	tmp[n++] = tor;
3208
3209	/* sort them by position */
3210	qsort( tmp, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3211
3212	#if 0
3213	fprintf( stderr, "%s", "queue: " );
3214	for( i=0; i<n; ++i )
3215	fprintf( stderr, "%d ", tmp[i]->queuePosition );
3216	fputc( '\n', stderr );
3217	#endif
3218
3219	/* test them */
3220	for( i=0; is_sequenced && i<n; ++i )
3221	if( tmp[i]->queuePosition != i )
3222	is_sequenced = false;
3223
3224	tr_free( tmp );
3225	return is_sequenced;
3226	}
3227	#endif
3228
3229	int
3230	tr_torrentGetQueuePosition( const tr_torrent * tor )
3231	{
3232	return tor->queuePosition;
3233	}
3234
3235	void
3236	tr_torrentSetQueuePosition( tr_torrent * tor, int pos )
3237	{
3238	int back = -1;
3239	tr_torrent * walk;
3240	const int old_pos = tor->queuePosition;
3241	const time_t now = tr_time( );
3242
3243	if( pos < 0 )
3244	pos = 0;
3245
3246	tor->queuePosition = -1;
3247
3248	walk = NULL;
3249	while(( walk = tr_torrentNext( tor->session, walk )))
3250	{
3251	if( old_pos < pos ) {
3252	if( ( old_pos <= walk->queuePosition ) && ( walk->queuePosition <= pos ) ) {
3253	walk->queuePosition--;
3254	walk->anyDate = now;
3255	}
3256	}
3257
3258	if( old_pos > pos ) {
3259	if( ( pos <= walk->queuePosition ) && ( walk->queuePosition < old_pos ) ) {
3260	walk->queuePosition++;
3261	walk->anyDate = now;
3262	}
3263	}
3264
3265	if( back < walk->queuePosition )
3266	back = walk->queuePosition;
3267	}
3268
3269	tor->queuePosition = MIN( pos, (back+1) );
3270	tor->anyDate = now;
3271
3272	assert( queueIsSequenced( tor->session ) );
3273	}
3274
3275	void
3276	tr_torrentsQueueMoveTop( tr_torrent ** torrents_in, int n )
3277	{
3278	int i;
3279	tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3280	qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3281	for( i=n-1; i>=0; --i )
3282	tr_torrentSetQueuePosition( torrents[i], 0 );
3283	tr_free( torrents );
3284	}
3285
3286	void
3287	tr_torrentsQueueMoveUp( tr_torrent ** torrents_in, int n )
3288	{
3289	int i;
3290	tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3291	qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3292	for( i=0; i<n; ++i )
3293	tr_torrentSetQueuePosition( torrents[i], torrents[i]->queuePosition - 1 );
3294	tr_free( torrents );
3295	}
3296
3297	void
3298	tr_torrentsQueueMoveDown( tr_torrent ** torrents_in, int n )
3299	{
3300	int i;
3301	tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3302	qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3303	for( i=n-1; i>=0; --i )
3304	tr_torrentSetQueuePosition( torrents[i], torrents[i]->queuePosition + 1 );
3305	tr_free( torrents );
3306	}
3307
3308	void
3309	tr_torrentsQueueMoveBottom( tr_torrent ** torrents_in, int n )
3310	{
3311	int i;
3312	tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3313	qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3314	for( i=0; i<n; ++i )
3315	tr_torrentSetQueuePosition( torrents[i], INT_MAX );
3316	tr_free( torrents );
3317	}
3318
3319	static void
3320	torrentSetQueued( tr_torrent * tor, bool queued )
3321	{
3322	assert( tr_isTorrent( tor ) );
3323	assert( tr_isBool( queued ) );
3324
3325	if( tr_torrentIsQueued( tor ) != queued )
3326	{
3327	tor->isQueued = queued;
3328	tor->anyDate = tr_time( );
3329	}
3330	}
3331
3332	void
3333	tr_torrentSetQueueStartCallback( tr_torrent * torrent, void (callback)( tr_torrent , void * ), void * user_data )
3334	{
3335	torrent->queue_started_callback = callback;
3336	torrent->queue_started_user_data = user_data;
3337	}
3338
3339

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