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source: trunk/libtransmission/torrent.c @ 7385

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Last change on this file since 7385 was 7385, checked in by charles, 12 years ago
(trunk libT) more semantic cleanup: tr_handle->tr_session, int->tr_bool, int->tr_port
Property svn:keywords set to `Date Rev Author Id`
File size: 45.4 KB

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1	/******************************************************************************
2	* $Id: torrent.c 7385 2008-12-14 11:21:11Z charles $
3	*
4	* Copyright (c) 2005-2008 Transmission authors and contributors
5	*
6	* Permission is hereby granted, free of charge, to any person obtaining a
7	* copy of this software and associated documentation files (the "Software"),
8	* to deal in the Software without restriction, including without limitation
9	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
10	* and/or sell copies of the Software, and to permit persons to whom the
11	* Software is furnished to do so, subject to the following conditions:
12	*
13	* The above copyright notice and this permission notice shall be included in
14	* all copies or substantial portions of the Software.
15	*
16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22	* DEALINGS IN THE SOFTWARE.
23	*****************************************************************************/
24
25	#include <sys/types.h> /* stat */
26	#include <sys/stat.h> /* stat */
27	#include <unistd.h> /* stat */
28
29	#include <assert.h>
30	#include <limits.h> /* INT_MAX */
31	#include <string.h> /* memcmp */
32	#include <stdlib.h> /* qsort */
33
34	#include "transmission.h"
35	#include "bandwidth.h"
36	#include "bencode.h"
37	#include "completion.h"
38	#include "crypto.h" /* for tr_sha1 */
39	#include "resume.h"
40	#include "fdlimit.h" /* tr_fdFileClose */
41	#include "metainfo.h"
42	#include "peer-mgr.h"
43	#include "ratecontrol.h"
44	#include "torrent.h"
45	#include "tracker.h"
46	#include "trevent.h"
47	#include "utils.h"
48	#include "verify.h"
49
50	#define MAX_BLOCK_SIZE ( 1024 * 16 )
51
52	/***
53	****
54	***/
55
56	int
57	tr_torrentId( const tr_torrent * tor )
58	{
59	return tor->uniqueId;
60	}
61
62	tr_torrent*
63	tr_torrentFindFromId( tr_session * session, int id )
64	{
65	tr_torrent * tor = NULL;
66
67	while( ( tor = tr_torrentNext( session, tor ) ) )
68	if( tor->uniqueId == id )
69	return tor;
70
71	return NULL;
72	}
73
74	tr_torrent*
75	tr_torrentFindFromHashString( tr_session * session, const char * str )
76	{
77	tr_torrent * tor = NULL;
78
79	while( ( tor = tr_torrentNext( session, tor ) ) )
80	if( !strcmp( str, tor->info.hashString ) )
81	return tor;
82
83	return NULL;
84	}
85
86	tr_bool
87	tr_torrentExists( const tr_session * session, const uint8_t * torrentHash )
88	{
89	return tr_torrentFindFromHash( (tr_session*)session, torrentHash ) != NULL;
90	}
91
92	tr_torrent*
93	tr_torrentFindFromHash( tr_session * session, const uint8_t * torrentHash )
94	{
95	tr_torrent * tor = NULL;
96
97	while( ( tor = tr_torrentNext( session, tor ) ) )
98	if( tor->info.hash == torrentHash )
99	if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
100	return tor;
101
102	return NULL;
103	}
104
105	tr_torrent*
106	tr_torrentFindFromObfuscatedHash( tr_session * session,
107	const uint8_t * obfuscatedTorrentHash )
108	{
109	tr_torrent * tor = NULL;
110
111	while( ( tor = tr_torrentNext( session, tor ) ) )
112	if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
113	SHA_DIGEST_LENGTH ) )
114	return tor;
115
116	return NULL;
117	}
118
119	/***
120	**** LOCKS
121	***/
122
123	void
124	tr_torrentLock( const tr_torrent * tor )
125	{
126	tr_globalLock( tor->session );
127	}
128
129	void
130	tr_torrentUnlock( const tr_torrent * tor )
131	{
132	tr_globalUnlock( tor->session );
133	}
134
135	/***
136	**** PER-TORRENT UL / DL SPEEDS
137	***/
138
139	void
140	tr_torrentSetSpeedMode( tr_torrent * tor,
141	tr_direction dir,
142	tr_speedlimit mode )
143	{
144	assert( tor != NULL );
145	assert( dir==TR_UP \|\| dir==TR_DOWN );
146	assert( mode==TR_SPEEDLIMIT_GLOBAL \|\| mode==TR_SPEEDLIMIT_SINGLE \|\| mode==TR_SPEEDLIMIT_UNLIMITED );
147
148	tor->speedLimitMode[dir] = mode;
149
150	tr_bandwidthSetLimited( tor->bandwidth, dir, mode==TR_SPEEDLIMIT_SINGLE );
151	tr_bandwidthHonorParentLimits( tor->bandwidth, dir, mode==TR_SPEEDLIMIT_GLOBAL );
152	}
153
154	tr_speedlimit
155	tr_torrentGetSpeedMode( const tr_torrent * tor,
156	tr_direction dir )
157	{
158	assert( tor != NULL );
159	assert( dir==TR_UP \|\| dir==TR_DOWN );
160
161	return tor->speedLimitMode[dir];
162	}
163
164	void
165	tr_torrentSetSpeedLimit( tr_torrent * tor,
166	tr_direction dir,
167	int desiredSpeed )
168	{
169	tr_bandwidthSetDesiredSpeed( tor->bandwidth, dir, desiredSpeed );
170	}
171
172	int
173	tr_torrentGetSpeedLimit( const tr_torrent * tor,
174	tr_direction dir )
175	{
176	return tr_bandwidthGetDesiredSpeed( tor->bandwidth, dir );
177	}
178
179	tr_bool
180	tr_torrentIsPieceTransferAllowed( const tr_torrent * tor,
181	tr_direction direction )
182	{
183	tr_bool isEnabled = FALSE;
184
185	switch( tr_torrentGetSpeedMode( tor, direction ) )
186	{
187	case TR_SPEEDLIMIT_GLOBAL:
188	isEnabled = !tr_sessionIsSpeedLimitEnabled( tor->session, direction )
189	\|\| tr_sessionGetSpeedLimit( tor->session, direction ) > 0;
190	break;
191
192	case TR_SPEEDLIMIT_SINGLE:
193	isEnabled = tr_torrentGetSpeedLimit( tor, direction ) > 0;
194	break;
195
196	case TR_SPEEDLIMIT_UNLIMITED:
197	isEnabled = TRUE;
198	break;
199
200	default:
201	assert( 0 && "unhandled speed mode" );
202	break;
203	}
204
205	return isEnabled;
206	}
207
208	/***
209	****
210	***/
211
212	static void
213	onTrackerResponse( void * tracker UNUSED,
214	void * vevent,
215	void * user_data )
216	{
217	tr_torrent * tor = user_data;
218	tr_tracker_event * event = vevent;
219
220	switch( event->messageType )
221	{
222	case TR_TRACKER_PEERS:
223	{
224	size_t i, n;
225	tr_pex * pex = tr_peerMgrCompactToPex( event->compact,
226	event->compactLen,
227	NULL, 0, &n );
228	if( event->allAreSeeds )
229	tr_tordbg( tor, "Got %d seeds from tracker", (int)n );
230	else
231	tr_torinf( tor, _( "Got %d peers from tracker" ), (int)n );
232
233	for( i = 0; i < n; ++i )
234	{
235	if( event->allAreSeeds )
236	pex[i].flags \|= ADDED_F_SEED_FLAG;
237	tr_peerMgrAddPex( tor->session->peerMgr, tor->info.hash,
238	TR_PEER_FROM_TRACKER, pex + i );
239	}
240
241	tr_free( pex );
242	break;
243	}
244
245	case TR_TRACKER_WARNING:
246	tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
247	tor->error = -1;
248	tr_strlcpy( tor->errorString, event->text,
249	sizeof( tor->errorString ) );
250	break;
251
252	case TR_TRACKER_ERROR:
253	tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
254	tor->error = -2;
255	tr_strlcpy( tor->errorString, event->text,
256	sizeof( tor->errorString ) );
257	break;
258
259	case TR_TRACKER_ERROR_CLEAR:
260	tor->error = 0;
261	tor->errorString[0] = '\0';
262	break;
263	}
264	}
265
266	/***
267	****
268	**** TORRENT INSTANTIATION
269	****
270	***/
271
272	static int
273	getBytePiece( const tr_info * info,
274	uint64_t byteOffset )
275	{
276	assert( info );
277	assert( info->pieceSize != 0 );
278
279	return byteOffset / info->pieceSize;
280	}
281
282	static void
283	initFilePieces( tr_info * info,
284	tr_file_index_t fileIndex )
285	{
286	tr_file * file;
287	uint64_t firstByte, lastByte;
288
289	assert( info );
290	assert( fileIndex < info->fileCount );
291
292	file = &info->files[fileIndex];
293	firstByte = file->offset;
294	lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
295	file->firstPiece = getBytePiece( info, firstByte );
296	file->lastPiece = getBytePiece( info, lastByte );
297	}
298
299	static int
300	pieceHasFile( tr_piece_index_t piece,
301	const tr_file * file )
302	{
303	return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
304	}
305
306	static tr_priority_t
307	calculatePiecePriority( const tr_torrent * tor,
308	tr_piece_index_t piece,
309	int fileHint )
310	{
311	tr_file_index_t i;
312	int priority = TR_PRI_LOW;
313
314	/* find the first file that has data in this piece */
315	if( fileHint >= 0 )
316	{
317	i = fileHint;
318	while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
319	--i;
320	}
321	else
322	{
323	for( i = 0; i < tor->info.fileCount; ++i )
324	if( pieceHasFile( piece, &tor->info.files[i] ) )
325	break;
326	}
327
328	/* the piece's priority is the max of the priorities
329	* of all the files in that piece */
330	for( ; i < tor->info.fileCount; ++i )
331	{
332	const tr_file * file = &tor->info.files[i];
333
334	if( !pieceHasFile( piece, file ) )
335	break;
336
337	priority = MAX( priority, file->priority );
338
339	/* when dealing with multimedia files, getting the first and
340	last pieces can sometimes allow you to preview it a bit
341	before it's fully downloaded... */
342	if( file->priority >= TR_PRI_NORMAL )
343	if( file->firstPiece == piece \|\| file->lastPiece == piece )
344	priority = TR_PRI_HIGH;
345	}
346
347	return priority;
348	}
349
350	static void
351	tr_torrentInitFilePieces( tr_torrent * tor )
352	{
353	tr_file_index_t ff;
354	tr_piece_index_t pp;
355	uint64_t offset = 0;
356	tr_info * inf = &tor->info;
357
358	assert( inf );
359
360	for( ff = 0; ff < inf->fileCount; ++ff )
361	{
362	inf->files[ff].offset = offset;
363	offset += inf->files[ff].length;
364	initFilePieces( inf, ff );
365	}
366
367	for( pp = 0; pp < inf->pieceCount; ++pp )
368	inf->pieces[pp].priority = calculatePiecePriority( tor, pp, -1 );
369	}
370
371	int
372	tr_torrentPromoteTracker( tr_torrent * tor,
373	int pos )
374	{
375	int i;
376	int tier;
377
378	assert( tor );
379	assert( ( 0 <= pos ) && ( pos < tor->info.trackerCount ) );
380
381	/* the tier of the tracker we're promoting */
382	tier = tor->info.trackers[pos].tier;
383
384	/* find the index of that tier's first tracker */
385	for( i = 0; i < tor->info.trackerCount; ++i )
386	if( tor->info.trackers[i].tier == tier )
387	break;
388
389	assert( i < tor->info.trackerCount );
390
391	/* promote the tracker at `pos' to the front of the tier */
392	if( i != pos )
393	{
394	const tr_tracker_info tmp = tor->info.trackers[i];
395	tor->info.trackers[i] = tor->info.trackers[pos];
396	tor->info.trackers[pos] = tmp;
397	}
398
399	/* return the new position of the tracker that started out at [pos] */
400	return i;
401	}
402
403	struct RandomTracker
404	{
405	tr_tracker_info tracker;
406	int random_value;
407	};
408
409	/* the tiers will be sorted from lowest to highest,
410	* and trackers are randomized within the tiers */
411	static int
412	compareRandomTracker( const void * va,
413	const void * vb )
414	{
415	const struct RandomTracker * a = va;
416	const struct RandomTracker * b = vb;
417
418	if( a->tracker.tier != b->tracker.tier )
419	return a->tracker.tier - b->tracker.tier;
420
421	return a->random_value - b->random_value;
422	}
423
424	static void
425	randomizeTiers( tr_info * info )
426	{
427	int i;
428	const int n = info->trackerCount;
429	struct RandomTracker * r = tr_new0( struct RandomTracker, n );
430
431	for( i = 0; i < n; ++i )
432	{
433	r[i].tracker = info->trackers[i];
434	r[i].random_value = tr_cryptoRandInt( INT_MAX );
435	}
436	qsort( r, n, sizeof( struct RandomTracker ), compareRandomTracker );
437	for( i = 0; i < n; ++i )
438	info->trackers[i] = r[i].tracker;
439	tr_free( r );
440	}
441
442	static void torrentStart( tr_torrent * tor,
443	int reloadProgress );
444
445	/**
446	* Decide on a block size. constraints:
447	* (1) most clients decline requests over 16 KiB
448	* (2) pieceSize must be a multiple of block size
449	*/
450	static uint32_t
451	getBlockSize( uint32_t pieceSize )
452	{
453	uint32_t b = pieceSize;
454
455	while( b > MAX_BLOCK_SIZE )
456	b /= 2u;
457
458	if( !b \|\| ( pieceSize % b ) ) /* not cleanly divisible */
459	return 0;
460	return b;
461	}
462
463	static void
464	torrentRealInit( tr_session * session,
465	tr_torrent * tor,
466	const tr_ctor * ctor )
467	{
468	int doStart;
469	uint64_t loaded;
470	uint64_t t;
471	tr_info * info = &tor->info;
472	static int nextUniqueId = 1;
473
474	tr_globalLock( session );
475
476	tor->session = session;
477	tor->uniqueId = nextUniqueId++;
478
479	randomizeTiers( info );
480
481	tor->bandwidth = tr_bandwidthNew( session, session->bandwidth );
482
483	tor->blockSize = getBlockSize( info->pieceSize );
484
485	tor->lastPieceSize = info->totalSize % info->pieceSize;
486
487	if( !tor->lastPieceSize )
488	tor->lastPieceSize = info->pieceSize;
489
490	tor->lastBlockSize = info->totalSize % tor->blockSize;
491
492	if( !tor->lastBlockSize )
493	tor->lastBlockSize = tor->blockSize;
494
495	tor->blockCount =
496	( info->totalSize + tor->blockSize - 1 ) / tor->blockSize;
497
498	tor->blockCountInPiece =
499	info->pieceSize / tor->blockSize;
500
501	tor->blockCountInLastPiece =
502	( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize;
503
504	/* check our work */
505	assert( ( info->pieceSize % tor->blockSize ) == 0 );
506	t = info->pieceCount - 1;
507	t *= info->pieceSize;
508	t += tor->lastPieceSize;
509	assert( t == info->totalSize );
510	t = tor->blockCount - 1;
511	t *= tor->blockSize;
512	t += tor->lastBlockSize;
513	assert( t == info->totalSize );
514	t = info->pieceCount - 1;
515	t *= tor->blockCountInPiece;
516	t += tor->blockCountInLastPiece;
517	assert( t == (uint64_t)tor->blockCount );
518
519	tor->completion = tr_cpInit( tor );
520
521	tr_torrentInitFilePieces( tor );
522
523	tor->swarmSpeed = tr_rcInit( );
524
525	tr_sha1( tor->obfuscatedHash, "req2", 4,
526	info->hash, SHA_DIGEST_LENGTH,
527	NULL );
528
529	tr_peerMgrAddTorrent( session->peerMgr, tor );
530
531	assert( session->isPortSet );
532	assert( !tor->downloadedCur );
533	assert( !tor->uploadedCur );
534
535	tor->error = 0;
536
537	tor->checkedPieces = tr_bitfieldNew( tor->info.pieceCount );
538	tr_torrentUncheck( tor );
539
540	tor->addedDate = time( NULL ); /* this is a default value to be
541	overwritten by the resume file */
542	loaded = tr_torrentLoadResume( tor, ~0, ctor );
543
544	doStart = tor->isRunning;
545	tor->isRunning = 0;
546
547	if( !( loaded & TR_FR_SPEEDLIMIT ) )
548	{
549	tr_torrentSetSpeedLimit( tor, TR_UP,
550	tr_sessionGetSpeedLimit( tor->session, TR_UP ) );
551	tr_torrentSetSpeedLimit( tor, TR_DOWN,
552	tr_sessionGetSpeedLimit( tor->session,
553	TR_DOWN ) );
554	}
555
556	tor->completeness = tr_cpGetStatus( tor->completion );
557
558	tor->tracker = tr_trackerNew( tor );
559	tor->trackerSubscription =
560	tr_trackerSubscribe( tor->tracker, onTrackerResponse,
561	tor );
562
563	{
564	tr_torrent * it = NULL;
565	tr_torrent * last = NULL;
566	while( ( it = tr_torrentNext( session, it ) ) )
567	last = it;
568
569	if( !last )
570	session->torrentList = tor;
571	else
572	last->next = tor;
573	++session->torrentCount;
574	}
575
576	tr_globalUnlock( session );
577
578	/* maybe save our own copy of the metainfo */
579	if( tr_ctorGetSave( ctor ) )
580	{
581	const tr_benc * val;
582	if( !tr_ctorGetMetainfo( ctor, &val ) )
583	{
584	const char * filename = tor->info.torrent;
585	tr_bencSaveFile( filename, val );
586	tr_sessionSetTorrentFile( tor->session, tor->info.hashString,
587	filename );
588	}
589	}
590
591	tr_metainfoMigrate( session, &tor->info );
592
593	if( doStart )
594	torrentStart( tor, FALSE );
595	}
596
597	int
598	tr_torrentParse( const tr_session * session,
599	const tr_ctor * ctor,
600	tr_info * setmeInfo )
601	{
602	int err = 0;
603	int doFree;
604	tr_info tmp;
605	const tr_benc * metainfo;
606
607	if( setmeInfo == NULL )
608	setmeInfo = &tmp;
609	memset( setmeInfo, 0, sizeof( tr_info ) );
610
611	if( !err && tr_ctorGetMetainfo( ctor, &metainfo ) )
612	return TR_EINVALID;
613
614	err = tr_metainfoParse( session, setmeInfo, metainfo );
615	doFree = !err && ( setmeInfo == &tmp );
616
617	if( !err && !getBlockSize( setmeInfo->pieceSize ) )
618	err = TR_EINVALID;
619
620	if( !err && tr_torrentExists( session, setmeInfo->hash ) )
621	err = TR_EDUPLICATE;
622
623	if( doFree )
624	tr_metainfoFree( setmeInfo );
625
626	return err;
627	}
628
629	tr_torrent *
630	tr_torrentNew( tr_session * session,
631	const tr_ctor * ctor,
632	int * setmeError )
633	{
634	int err;
635	tr_info tmpInfo;
636	tr_torrent * tor = NULL;
637
638	err = tr_torrentParse( session, ctor, &tmpInfo );
639	if( !err )
640	{
641	tor = tr_new0( tr_torrent, 1 );
642	tor->info = tmpInfo;
643	torrentRealInit( session, tor, ctor );
644	}
645	else if( setmeError )
646	{
647	*setmeError = err;
648	}
649
650	return tor;
651	}
652
653	/**
654	***
655	**/
656
657	void
658	tr_torrentSetDownloadDir( tr_torrent * tor,
659	const char * path )
660	{
661	if( !path \|\| !tor->downloadDir \|\| strcmp( path, tor->downloadDir ) )
662	{
663	tr_free( tor->downloadDir );
664	tor->downloadDir = tr_strdup( path );
665	tr_torrentSaveResume( tor );
666	}
667	}
668
669	const char*
670	tr_torrentGetDownloadDir( const tr_torrent * tor )
671	{
672	return tor->downloadDir;
673	}
674
675	void
676	tr_torrentChangeMyPort( tr_torrent * tor )
677	{
678	if( tor->tracker )
679	tr_trackerChangeMyPort( tor->tracker );
680	}
681
682	tr_bool
683	tr_torrentIsPrivate( const tr_torrent * tor )
684	{
685	return tor
686	&& tor->info.isPrivate;
687	}
688
689	tr_bool
690	tr_torrentAllowsPex( const tr_torrent * tor )
691	{
692	return tor
693	&& tor->session->isPexEnabled
694	&& !tr_torrentIsPrivate( tor );
695	}
696
697	static void
698	tr_torrentManualUpdateImpl( void * vtor )
699	{
700	tr_torrent * tor = vtor;
701
702	if( tor->isRunning )
703	tr_trackerReannounce( tor->tracker );
704	}
705
706	void
707	tr_torrentManualUpdate( tr_torrent * tor )
708	{
709	tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
710	}
711
712	int
713	tr_torrentCanManualUpdate( const tr_torrent * tor )
714	{
715	return ( tor )
716	&& ( tor->isRunning )
717	&& ( tr_trackerCanManualAnnounce( tor->tracker ) );
718	}
719
720	const tr_info *
721	tr_torrentInfo( const tr_torrent * tor )
722	{
723	return tor ? &tor->info : NULL;
724	}
725
726	const tr_stat *
727	tr_torrentStatCached( tr_torrent * tor )
728	{
729	const time_t now = time( NULL );
730
731	return tor && ( now == tor->lastStatTime ) ? &tor->stats
732	: tr_torrentStat( tor );
733	}
734
735	tr_torrent_activity
736	tr_torrentGetActivity( tr_torrent * tor )
737	{
738	tr_torrentRecheckCompleteness( tor );
739
740	if( tor->verifyState == TR_VERIFY_NOW )
741	return TR_STATUS_CHECK;
742	if( tor->verifyState == TR_VERIFY_WAIT )
743	return TR_STATUS_CHECK_WAIT;
744	if( !tor->isRunning )
745	return TR_STATUS_STOPPED;
746	if( tor->completeness == TR_LEECH )
747	return TR_STATUS_DOWNLOAD;
748
749	return TR_STATUS_SEED;
750	}
751
752	const tr_stat *
753	tr_torrentStat( tr_torrent * tor )
754	{
755	tr_stat * s;
756	struct tr_tracker * tc;
757	const tr_tracker_info * ti;
758	int usableSeeds = 0;
759
760	if( !tor )
761	return NULL;
762
763	tr_torrentLock( tor );
764
765	tor->lastStatTime = time( NULL );
766
767	s = &tor->stats;
768	s->id = tor->uniqueId;
769	s->activity = tr_torrentGetActivity( tor );
770	s->error = tor->error;
771	memcpy( s->errorString, tor->errorString,
772	sizeof( s->errorString ) );
773
774	tc = tor->tracker;
775	ti = tr_trackerGetAddress( tor->tracker );
776	s->announceURL = ti ? ti->announce : NULL;
777	s->scrapeURL = ti ? ti->scrape : NULL;
778	tr_trackerStat( tc, s );
779
780	tr_trackerGetCounts( tc, &s->timesCompleted,
781	&s->leechers,
782	&s->seeders,
783	&s->downloaders );
784
785	tr_peerMgrTorrentStats( tor->session->peerMgr,
786	tor->info.hash,
787	&s->peersKnown,
788	&s->peersConnected,
789	&usableSeeds,
790	&s->webseedsSendingToUs,
791	&s->peersSendingToUs,
792	&s->peersGettingFromUs,
793	s->peersFrom );
794
795	s->rawUploadSpeed = tr_bandwidthGetRawSpeed ( tor->bandwidth, TR_UP );
796	s->rawDownloadSpeed = tr_bandwidthGetRawSpeed ( tor->bandwidth, TR_DOWN );
797	s->pieceUploadSpeed = tr_bandwidthGetPieceSpeed( tor->bandwidth, TR_UP );
798	s->pieceDownloadSpeed = tr_bandwidthGetPieceSpeed( tor->bandwidth, TR_DOWN );
799
800	usableSeeds += tor->info.webseedCount;
801
802	s->percentComplete = tr_cpPercentComplete ( tor->completion );
803
804	s->percentDone = tr_cpPercentDone( tor->completion );
805	s->leftUntilDone = tr_cpLeftUntilDone( tor->completion );
806	s->sizeWhenDone = tr_cpSizeWhenDone( tor->completion );
807
808	s->recheckProgress = s->activity == TR_STATUS_CHECK
809	? 1.0 -
810	( tr_torrentCountUncheckedPieces( tor ) /
811	(double) tor->info.pieceCount )
812	: 0.0;
813
814	s->swarmSpeed = tr_rcRate( tor->swarmSpeed );
815
816	s->activityDate = tor->activityDate;
817	s->addedDate = tor->addedDate;
818	s->doneDate = tor->doneDate;
819	s->startDate = tor->startDate;
820
821	s->corruptEver = tor->corruptCur + tor->corruptPrev;
822	s->downloadedEver = tor->downloadedCur + tor->downloadedPrev;
823	s->uploadedEver = tor->uploadedCur + tor->uploadedPrev;
824	s->haveValid = tr_cpHaveValid( tor->completion );
825	s->haveUnchecked = tr_cpHaveTotal( tor->completion ) - s->haveValid;
826
827
828	if( usableSeeds > 0 )
829	{
830	s->desiredAvailable = s->leftUntilDone;
831	}
832	else if( !s->leftUntilDone \|\| !s->peersConnected )
833	{
834	s->desiredAvailable = 0;
835	}
836	else
837	{
838	tr_piece_index_t i;
839	tr_bitfield * peerPieces = tr_peerMgrGetAvailable(
840	tor->session->peerMgr,
841	tor->info.
842	hash );
843	s->desiredAvailable = 0;
844	for( i = 0; i < tor->info.pieceCount; ++i )
845	if( !tor->info.pieces[i].dnd && tr_bitfieldHas( peerPieces, i ) )
846	s->desiredAvailable += tr_cpMissingBlocksInPiece(
847	tor->completion, i );
848	s->desiredAvailable *= tor->blockSize;
849	tr_bitfieldFree( peerPieces );
850	}
851
852	if( s->leftUntilDone > s->desiredAvailable )
853	s->eta = TR_ETA_NOT_AVAIL;
854	else if( s->pieceDownloadSpeed < 0.1 )
855	s->eta = TR_ETA_UNKNOWN;
856	else
857	s->eta = s->leftUntilDone / s->pieceDownloadSpeed / 1024.0;
858
859	s->ratio = tr_getRatio(
860	s->uploadedEver,
861	s->downloadedEver ? s->downloadedEver : s->
862	haveValid );
863
864	tr_torrentUnlock( tor );
865
866	return s;
867	}
868
869	/***
870	****
871	***/
872
873	static uint64_t
874	fileBytesCompleted( const tr_torrent * tor,
875	tr_file_index_t fileIndex )
876	{
877	const tr_file * file = &tor->info.files[fileIndex];
878	const tr_block_index_t firstBlock = file->offset /
879	tor->blockSize;
880	const uint64_t firstBlockOffset = file->offset %
881	tor->blockSize;
882	const uint64_t lastOffset =
883	file->length ? ( file->length - 1 ) : 0;
884	const tr_block_index_t lastBlock =
885	( file->offset + lastOffset ) / tor->blockSize;
886	const uint64_t lastBlockOffset =
887	( file->offset + lastOffset ) % tor->blockSize;
888	uint64_t haveBytes = 0;
889
890	assert( tor );
891	assert( fileIndex < tor->info.fileCount );
892	assert( file->offset + file->length <= tor->info.totalSize );
893	assert( ( firstBlock < tor->blockCount )
894	\|\| ( !file->length && file->offset == tor->info.totalSize ) );
895	assert( ( lastBlock < tor->blockCount )
896	\|\| ( !file->length && file->offset == tor->info.totalSize ) );
897	assert( firstBlock <= lastBlock );
898	assert( tr_torBlockPiece( tor, firstBlock ) == file->firstPiece );
899	assert( tr_torBlockPiece( tor, lastBlock ) == file->lastPiece );
900
901	if( firstBlock == lastBlock )
902	{
903	if( tr_cpBlockIsComplete( tor->completion, firstBlock ) )
904	haveBytes += lastBlockOffset + 1 - firstBlockOffset;
905	}
906	else
907	{
908	tr_block_index_t i;
909
910	if( tr_cpBlockIsComplete( tor->completion, firstBlock ) )
911	haveBytes += tor->blockSize - firstBlockOffset;
912
913	for( i = firstBlock + 1; i < lastBlock; ++i )
914	if( tr_cpBlockIsComplete( tor->completion, i ) )
915	haveBytes += tor->blockSize;
916
917	if( tr_cpBlockIsComplete( tor->completion, lastBlock ) )
918	haveBytes += lastBlockOffset + 1;
919	}
920
921	return haveBytes;
922	}
923
924	tr_file_stat *
925	tr_torrentFiles( const tr_torrent * tor,
926	tr_file_index_t * fileCount )
927	{
928	tr_file_index_t i;
929	const tr_file_index_t n = tor->info.fileCount;
930	tr_file_stat * files = tr_new0( tr_file_stat, n );
931	tr_file_stat * walk = files;
932
933	for( i = 0; i < n; ++i, ++walk )
934	{
935	const uint64_t b = fileBytesCompleted( tor, i );
936	walk->bytesCompleted = b;
937	walk->progress = tr_getRatio( b, tor->info.files[i].length );
938	}
939
940	if( fileCount )
941	*fileCount = n;
942
943	return files;
944	}
945
946	void
947	tr_torrentFilesFree( tr_file_stat * files,
948	tr_file_index_t fileCount UNUSED )
949	{
950	tr_free( files );
951	}
952
953	/***
954	****
955	***/
956
957	float*
958	tr_torrentWebSpeeds( const tr_torrent * tor )
959	{
960	return tor ? tr_peerMgrWebSpeeds( tor->session->peerMgr, tor->info.hash )
961	: NULL;
962	}
963
964	tr_peer_stat *
965	tr_torrentPeers( const tr_torrent * tor,
966	int * peerCount )
967	{
968	tr_peer_stat * ret = NULL;
969
970	if( tor )
971	ret = tr_peerMgrPeerStats( tor->session->peerMgr,
972	tor->info.hash, peerCount );
973
974	return ret;
975	}
976
977	void
978	tr_torrentPeersFree( tr_peer_stat * peers,
979	int peerCount UNUSED )
980	{
981	tr_free( peers );
982	}
983
984	void
985	tr_torrentAvailability( const tr_torrent * tor,
986	int8_t * tab,
987	int size )
988	{
989	tr_peerMgrTorrentAvailability( tor->session->peerMgr,
990	tor->info.hash,
991	tab, size );
992	}
993
994	void
995	tr_torrentAmountFinished( const tr_torrent * tor,
996	float * tab,
997	int size )
998	{
999	tr_torrentLock( tor );
1000	tr_cpGetAmountDone( tor->completion, tab, size );
1001	tr_torrentUnlock( tor );
1002	}
1003
1004	void
1005	tr_torrentResetTransferStats( tr_torrent * tor )
1006	{
1007	tr_torrentLock( tor );
1008
1009	tor->downloadedPrev += tor->downloadedCur;
1010	tor->downloadedCur = 0;
1011	tor->uploadedPrev += tor->uploadedCur;
1012	tor->uploadedCur = 0;
1013	tor->corruptPrev += tor->corruptCur;
1014	tor->corruptCur = 0;
1015
1016	tr_torrentUnlock( tor );
1017	}
1018
1019	void
1020	tr_torrentSetHasPiece( tr_torrent * tor,
1021	tr_piece_index_t pieceIndex,
1022	tr_bool has )
1023	{
1024	tr_torrentLock( tor );
1025
1026	assert( tor );
1027	assert( pieceIndex < tor->info.pieceCount );
1028
1029	if( has )
1030	tr_cpPieceAdd( tor->completion, pieceIndex );
1031	else
1032	tr_cpPieceRem( tor->completion, pieceIndex );
1033
1034	tr_torrentUnlock( tor );
1035	}
1036
1037	/***
1038	****
1039	***/
1040
1041	static void
1042	freeTorrent( tr_torrent * tor )
1043	{
1044	tr_torrent * t;
1045	tr_session * session = tor->session;
1046	tr_info * inf = &tor->info;
1047
1048	assert( tor );
1049	assert( !tor->isRunning );
1050
1051	tr_globalLock( session );
1052
1053	tr_peerMgrRemoveTorrent( session->peerMgr, tor->info.hash );
1054
1055	tr_cpClose( tor->completion );
1056
1057	tr_rcClose( tor->swarmSpeed );
1058
1059	tr_trackerUnsubscribe( tor->tracker, tor->trackerSubscription );
1060	tr_trackerFree( tor->tracker );
1061	tor->tracker = NULL;
1062
1063	tr_bitfieldFree( tor->checkedPieces );
1064
1065	tr_free( tor->downloadDir );
1066	tr_free( tor->peer_id );
1067
1068	if( tor == session->torrentList )
1069	session->torrentList = tor->next;
1070	else for( t = session->torrentList; t != NULL; t = t->next ) {
1071	if( t->next == tor ) {
1072	t->next = tor->next;
1073	break;
1074	}
1075	}
1076
1077	assert( session->torrentCount >= 1 );
1078	session->torrentCount--;
1079
1080	tr_bandwidthFree( tor->bandwidth );
1081
1082	tr_metainfoFree( inf );
1083	tr_free( tor );
1084
1085	tr_globalUnlock( session );
1086	}
1087
1088	/**
1089	*** Start/Stop Callback
1090	**/
1091
1092	static void
1093	checkAndStartImpl( void * vtor )
1094	{
1095	tr_torrent * tor = vtor;
1096
1097	tr_globalLock( tor->session );
1098
1099	tor->isRunning = 1;
1100	*tor->errorString = '\0';
1101	tr_torrentResetTransferStats( tor );
1102	tor->completeness = tr_cpGetStatus( tor->completion );
1103	tr_torrentSaveResume( tor );
1104	tor->startDate = time( NULL );
1105	tr_trackerStart( tor->tracker );
1106	tr_peerMgrStartTorrent( tor->session->peerMgr, tor->info.hash );
1107
1108	tr_globalUnlock( tor->session );
1109	}
1110
1111	static void
1112	checkAndStartCB( tr_torrent * tor )
1113	{
1114	tr_runInEventThread( tor->session, checkAndStartImpl, tor );
1115	}
1116
1117	static void
1118	torrentStart( tr_torrent * tor,
1119	int reloadProgress )
1120	{
1121	tr_globalLock( tor->session );
1122
1123	if( !tor->isRunning )
1124	{
1125	const int isVerifying = tr_verifyInProgress( tor );
1126
1127	if( !isVerifying && reloadProgress )
1128	tr_torrentLoadResume( tor, TR_FR_PROGRESS, NULL );
1129
1130	tor->isRunning = 1;
1131
1132	if( !isVerifying )
1133	tr_verifyAdd( tor, checkAndStartCB );
1134	}
1135
1136	tr_globalUnlock( tor->session );
1137	}
1138
1139	void
1140	tr_torrentStart( tr_torrent * tor )
1141	{
1142	if( tor )
1143	torrentStart( tor, TRUE );
1144	}
1145
1146	static void
1147	torrentRecheckDoneImpl( void * vtor )
1148	{
1149	tr_torrentRecheckCompleteness( vtor );
1150	}
1151
1152	static void
1153	torrentRecheckDoneCB( tr_torrent * tor )
1154	{
1155	tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1156	}
1157
1158	void
1159	tr_torrentVerify( tr_torrent * tor )
1160	{
1161	tr_verifyRemove( tor );
1162
1163	tr_globalLock( tor->session );
1164
1165	tr_torrentUncheck( tor );
1166	tr_verifyAdd( tor, torrentRecheckDoneCB );
1167
1168	tr_globalUnlock( tor->session );
1169	}
1170
1171	static void
1172	stopTorrent( void * vtor )
1173	{
1174	tr_file_index_t i;
1175
1176	tr_torrent * tor = vtor;
1177
1178	tr_verifyRemove( tor );
1179	tr_peerMgrStopTorrent( tor->session->peerMgr, tor->info.hash );
1180	tr_trackerStop( tor->tracker );
1181
1182	for( i = 0; i < tor->info.fileCount; ++i )
1183	{
1184	const tr_file * file = &tor->info.files[i];
1185	char * path = tr_buildPath( tor->downloadDir, file->name, NULL );
1186	tr_fdFileClose( path );
1187	tr_free( path );
1188	}
1189	}
1190
1191	void
1192	tr_torrentDeleteLocalData( tr_torrent * tor )
1193	{
1194	tr_file_index_t i;
1195
1196	for( i=0; i<tor->info.fileCount; ++i )
1197	{
1198	const tr_file * file = &tor->info.files[i];
1199	char * path = tr_buildPath( tor->downloadDir, file->name, NULL );
1200	tr_fdFileClose( path );
1201	unlink( path );
1202	tr_free( path );
1203	}
1204	}
1205
1206	void
1207	tr_torrentStop( tr_torrent * tor )
1208	{
1209	if( tor )
1210	{
1211	tr_globalLock( tor->session );
1212
1213	tor->isRunning = 0;
1214	if( !tor->isDeleting )
1215	tr_torrentSaveResume( tor );
1216	tr_runInEventThread( tor->session, stopTorrent, tor );
1217
1218	tr_globalUnlock( tor->session );
1219	}
1220	}
1221
1222	static void
1223	closeTorrent( void * vtor )
1224	{
1225	tr_torrent * tor = vtor;
1226
1227	tr_torrentSaveResume( tor );
1228	tor->isRunning = 0;
1229	stopTorrent( tor );
1230	if( tor->isDeleting )
1231	{
1232	tr_metainfoRemoveSaved( tor->session, &tor->info );
1233	tr_torrentRemoveResume( tor );
1234	}
1235	freeTorrent( tor );
1236	}
1237
1238	void
1239	tr_torrentFree( tr_torrent * tor )
1240	{
1241	if( tor )
1242	{
1243	tr_session * session = tor->session;
1244	tr_globalLock( session );
1245
1246	tr_torrentClearCompletenessCallback( tor );
1247	tr_runInEventThread( session, closeTorrent, tor );
1248
1249	tr_globalUnlock( session );
1250	}
1251	}
1252
1253	void
1254	tr_torrentRemove( tr_torrent * tor )
1255	{
1256	tor->isDeleting = 1;
1257	tr_torrentFree( tor );
1258	}
1259
1260	/**
1261	*** Completeness
1262	**/
1263
1264	static const char *
1265	getCompletionString( int type )
1266	{
1267	switch( type )
1268	{
1269	/* Translators: this is a minor point that's safe to skip over, but FYI:
1270	"Complete" and "Done" are specific, different terms in Transmission:
1271	"Complete" means we've downloaded every file in the torrent.
1272	"Done" means we're done downloading the files we wanted, but NOT all
1273	that exist */
1274	case TR_PARTIAL_SEED:
1275	return _( "Done" );
1276
1277	case TR_SEED:
1278	return _( "Complete" );
1279
1280	default:
1281	return _( "Incomplete" );
1282	}
1283	}
1284
1285	static void
1286	fireCompletenessChange( tr_torrent * tor,
1287	tr_completeness status )
1288	{
1289	assert( tor );
1290	assert( ( status == TR_LEECH )
1291	\|\| ( status == TR_SEED )
1292	\|\| ( status == TR_PARTIAL_SEED ) );
1293
1294	if( tor->completeness_func )
1295	tor->completeness_func( tor, status, tor->completeness_func_user_data );
1296	}
1297
1298	void
1299	tr_torrentSetCompletenessCallback( tr_torrent * tor,
1300	tr_torrent_completeness_func func,
1301	void * user_data )
1302	{
1303	assert( tor );
1304	tor->completeness_func = func;
1305	tor->completeness_func_user_data = user_data;
1306	}
1307
1308	void
1309	tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1310	{
1311	tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1312	}
1313
1314	void
1315	tr_torrentRecheckCompleteness( tr_torrent * tor )
1316	{
1317	tr_completeness completeness;
1318
1319	tr_torrentLock( tor );
1320
1321	completeness = tr_cpGetStatus( tor->completion );
1322
1323	if( completeness != tor->completeness )
1324	{
1325	const int recentChange = tor->downloadedCur != 0;
1326
1327	if( recentChange )
1328	{
1329	tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
1330	getCompletionString( tor->completeness ),
1331	getCompletionString( completeness ) );
1332	}
1333
1334	tor->completeness = completeness;
1335	fireCompletenessChange( tor, completeness );
1336
1337	if( recentChange && ( completeness == TR_SEED ) )
1338	{
1339	tr_trackerCompleted( tor->tracker );
1340
1341	tor->doneDate = time( NULL );
1342	}
1343
1344	tr_torrentSaveResume( tor );
1345	}
1346
1347	tr_torrentUnlock( tor );
1348	}
1349
1350	tr_bool
1351	tr_torrentIsSeed( const tr_torrent * tor )
1352	{
1353	return tor->completeness != TR_LEECH;
1354	}
1355
1356	/**
1357	*** File priorities
1358	**/
1359
1360	void
1361	tr_torrentInitFilePriority( tr_torrent * tor,
1362	tr_file_index_t fileIndex,
1363	tr_priority_t priority )
1364	{
1365	tr_piece_index_t i;
1366	tr_file * file;
1367
1368	assert( tor );
1369	assert( fileIndex < tor->info.fileCount );
1370	assert(
1371	priority == TR_PRI_LOW \|\| priority == TR_PRI_NORMAL \|\| priority ==
1372	TR_PRI_HIGH );
1373
1374	file = &tor->info.files[fileIndex];
1375	file->priority = priority;
1376	for( i = file->firstPiece; i <= file->lastPiece; ++i )
1377	tor->info.pieces[i].priority = calculatePiecePriority( tor, i,
1378	fileIndex );
1379	}
1380
1381	void
1382	tr_torrentSetFilePriorities( tr_torrent * tor,
1383	tr_file_index_t * files,
1384	tr_file_index_t fileCount,
1385	tr_priority_t priority )
1386	{
1387	tr_file_index_t i;
1388
1389	tr_torrentLock( tor );
1390
1391	for( i = 0; i < fileCount; ++i )
1392	tr_torrentInitFilePriority( tor, files[i], priority );
1393
1394	tr_torrentSaveResume( tor );
1395	tr_torrentUnlock( tor );
1396	}
1397
1398	tr_priority_t
1399	tr_torrentGetFilePriority( const tr_torrent * tor,
1400	tr_file_index_t file )
1401	{
1402	tr_priority_t ret;
1403
1404	tr_torrentLock( tor );
1405	assert( tor );
1406	assert( file < tor->info.fileCount );
1407	ret = tor->info.files[file].priority;
1408	tr_torrentUnlock( tor );
1409
1410	return ret;
1411	}
1412
1413	tr_priority_t*
1414	tr_torrentGetFilePriorities( const tr_torrent * tor )
1415	{
1416	tr_file_index_t i;
1417	tr_priority_t * p;
1418
1419	tr_torrentLock( tor );
1420	p = tr_new0( tr_priority_t, tor->info.fileCount );
1421	for( i = 0; i < tor->info.fileCount; ++i )
1422	p[i] = tor->info.files[i].priority;
1423	tr_torrentUnlock( tor );
1424
1425	return p;
1426	}
1427
1428	/**
1429	*** File DND
1430	**/
1431
1432	int
1433	tr_torrentGetFileDL( const tr_torrent * tor,
1434	tr_file_index_t file )
1435	{
1436	int doDownload;
1437
1438	tr_torrentLock( tor );
1439
1440	assert( file < tor->info.fileCount );
1441	doDownload = !tor->info.files[file].dnd;
1442
1443	tr_torrentUnlock( tor );
1444	return doDownload != 0;
1445	}
1446
1447	static void
1448	setFileDND( tr_torrent * tor,
1449	tr_file_index_t fileIndex,
1450	int doDownload )
1451	{
1452	tr_file * file;
1453	const int dnd = !doDownload;
1454	tr_piece_index_t firstPiece, firstPieceDND;
1455	tr_piece_index_t lastPiece, lastPieceDND;
1456	tr_file_index_t i;
1457
1458	file = &tor->info.files[fileIndex];
1459	file->dnd = dnd;
1460	firstPiece = file->firstPiece;
1461	lastPiece = file->lastPiece;
1462
1463	/* can't set the first piece to DND unless
1464	every file using that piece is DND */
1465	firstPieceDND = dnd;
1466	if( fileIndex > 0 )
1467	{
1468	for( i = fileIndex - 1; firstPieceDND; --i )
1469	{
1470	if( tor->info.files[i].lastPiece != firstPiece )
1471	break;
1472	firstPieceDND = tor->info.files[i].dnd;
1473	if( !i )
1474	break;
1475	}
1476	}
1477
1478	/* can't set the last piece to DND unless
1479	every file using that piece is DND */
1480	lastPieceDND = dnd;
1481	for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
1482	{
1483	if( tor->info.files[i].firstPiece != lastPiece )
1484	break;
1485	lastPieceDND = tor->info.files[i].dnd;
1486	}
1487
1488	if( firstPiece == lastPiece )
1489	{
1490	tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
1491	}
1492	else
1493	{
1494	tr_piece_index_t pp;
1495	tor->info.pieces[firstPiece].dnd = firstPieceDND;
1496	tor->info.pieces[lastPiece].dnd = lastPieceDND;
1497	for( pp = firstPiece + 1; pp < lastPiece; ++pp )
1498	tor->info.pieces[pp].dnd = dnd;
1499	}
1500	}
1501
1502	void
1503	tr_torrentInitFileDLs( tr_torrent * tor,
1504	tr_file_index_t * files,
1505	tr_file_index_t fileCount,
1506	tr_bool doDownload )
1507	{
1508	tr_file_index_t i;
1509
1510	tr_torrentLock( tor );
1511
1512	for( i = 0; i < fileCount; ++i )
1513	setFileDND( tor, files[i], doDownload );
1514	tr_cpInvalidateDND ( tor->completion );
1515
1516	tr_torrentUnlock( tor );
1517	}
1518
1519	void
1520	tr_torrentSetFileDLs( tr_torrent * tor,
1521	tr_file_index_t * files,
1522	tr_file_index_t fileCount,
1523	tr_bool doDownload )
1524	{
1525	tr_torrentLock( tor );
1526	tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
1527	tr_torrentSaveResume( tor );
1528	tr_torrentUnlock( tor );
1529	}
1530
1531	/***
1532	****
1533	***/
1534
1535	void
1536	tr_torrentSetPeerLimit( tr_torrent * tor,
1537	uint16_t maxConnectedPeers )
1538	{
1539	tor->maxConnectedPeers = maxConnectedPeers;
1540	}
1541
1542	uint16_t
1543	tr_torrentGetPeerLimit( const tr_torrent * tor )
1544	{
1545	return tor->maxConnectedPeers;
1546	}
1547
1548	/***
1549	****
1550	***/
1551
1552	tr_block_index_t
1553	_tr_block( const tr_torrent * tor,
1554	tr_piece_index_t index,
1555	uint32_t offset )
1556	{
1557	const tr_info * inf = &tor->info;
1558	tr_block_index_t ret;
1559
1560	ret = index;
1561	ret *= ( inf->pieceSize / tor->blockSize );
1562	ret += offset / tor->blockSize;
1563	return ret;
1564	}
1565
1566	tr_bool
1567	tr_torrentReqIsValid( const tr_torrent * tor,
1568	tr_piece_index_t index,
1569	uint32_t offset,
1570	uint32_t length )
1571	{
1572	int err = 0;
1573
1574	if( index >= tor->info.pieceCount )
1575	err = 1;
1576	else if( length < 1 )
1577	err = 2;
1578	else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
1579	err = 3;
1580	else if( length > MAX_BLOCK_SIZE )
1581	err = 4;
1582	else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
1583	err = 5;
1584
1585	if( err ) fprintf( stderr, "index %lu offset %lu length %lu err %d\n",
1586	(unsigned long)index, (unsigned long)offset,
1587	(unsigned long)length,
1588	err );
1589
1590	return !err;
1591	}
1592
1593	uint64_t
1594	tr_pieceOffset( const tr_torrent * tor,
1595	tr_piece_index_t index,
1596	uint32_t offset,
1597	uint32_t length )
1598	{
1599	uint64_t ret;
1600
1601	ret = tor->info.pieceSize;
1602	ret *= index;
1603	ret += offset;
1604	ret += length;
1605	return ret;
1606	}
1607
1608	/***
1609	****
1610	***/
1611
1612	tr_bool
1613	tr_torrentIsPieceChecked( const tr_torrent * tor,
1614	tr_piece_index_t piece )
1615	{
1616	return tr_bitfieldHas( tor->checkedPieces, piece );
1617	}
1618
1619	void
1620	tr_torrentSetPieceChecked( tr_torrent * tor,
1621	tr_piece_index_t piece,
1622	tr_bool isChecked )
1623	{
1624	if( isChecked )
1625	tr_bitfieldAdd( tor->checkedPieces, piece );
1626	else
1627	tr_bitfieldRem( tor->checkedPieces, piece );
1628	}
1629
1630	void
1631	tr_torrentSetFileChecked( tr_torrent * tor,
1632	tr_file_index_t fileIndex,
1633	tr_bool isChecked )
1634	{
1635	const tr_file * file = &tor->info.files[fileIndex];
1636	const tr_piece_index_t begin = file->firstPiece;
1637	const tr_piece_index_t end = file->lastPiece + 1;
1638
1639	if( isChecked )
1640	tr_bitfieldAddRange ( tor->checkedPieces, begin, end );
1641	else
1642	tr_bitfieldRemRange ( tor->checkedPieces, begin, end );
1643	}
1644
1645	tr_bool
1646	tr_torrentIsFileChecked( const tr_torrent * tor,
1647	tr_file_index_t fileIndex )
1648	{
1649	const tr_file * file = &tor->info.files[fileIndex];
1650	const tr_piece_index_t begin = file->firstPiece;
1651	const tr_piece_index_t end = file->lastPiece + 1;
1652	tr_piece_index_t i;
1653	tr_bool isChecked = TRUE;
1654
1655	for( i = begin; isChecked && i < end; ++i )
1656	if( !tr_torrentIsPieceChecked( tor, i ) )
1657	isChecked = FALSE;
1658
1659	return isChecked;
1660	}
1661
1662	void
1663	tr_torrentUncheck( tr_torrent * tor )
1664	{
1665	tr_bitfieldRemRange ( tor->checkedPieces, 0, tor->info.pieceCount );
1666	}
1667
1668	int
1669	tr_torrentCountUncheckedPieces( const tr_torrent * tor )
1670	{
1671	return tor->info.pieceCount - tr_bitfieldCountTrueBits(
1672	tor->checkedPieces );
1673	}
1674
1675	time_t*
1676	tr_torrentGetMTimes( const tr_torrent * tor,
1677	size_t * setme_n )
1678	{
1679	size_t i;
1680	const size_t n = tor->info.fileCount;
1681	time_t * m = tr_new0( time_t, n );
1682
1683	for( i = 0; i < n; ++i )
1684	{
1685	struct stat sb;
1686	char * path = tr_buildPath( tor->downloadDir, tor->info.files[i].name, NULL );
1687	if( !stat( path, &sb ) )
1688	{
1689	#ifdef SYS_DARWIN
1690	m[i] = sb.st_mtimespec.tv_sec;
1691	#else
1692	m[i] = sb.st_mtime;
1693	#endif
1694	}
1695	tr_free( path );
1696	}
1697
1698	*setme_n = n;
1699	return m;
1700	}
1701
1702	/***
1703	****
1704	***/
1705
1706	void
1707	tr_torrentSetAnnounceList( tr_torrent * tor,
1708	const tr_tracker_info * trackers,
1709	int trackerCount )
1710	{
1711	tr_benc metainfo;
1712
1713	/* save to the .torrent file */
1714	if( !tr_bencLoadFile( tor->info.torrent, &metainfo ) )
1715	{
1716	int i;
1717	int prevTier = -1;
1718	tr_benc * tier = NULL;
1719	tr_benc * announceList;
1720	tr_info tmpInfo;
1721
1722	/* remove the old fields */
1723	tr_bencDictRemove( &metainfo, "announce" );
1724	tr_bencDictRemove( &metainfo, "announce-list" );
1725
1726	/* add the new fields */
1727	tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
1728	announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
1729	for( i = 0; i < trackerCount; ++i ) {
1730	if( prevTier != trackers[i].tier ) {
1731	prevTier = trackers[i].tier;
1732	tier = tr_bencListAddList( announceList, 0 );
1733	}
1734	tr_bencListAddStr( tier, trackers[i].announce );
1735	}
1736
1737	/* try to parse it back again, to make sure it's good */
1738	memset( &tmpInfo, 0, sizeof( tr_info ) );
1739	if( !tr_metainfoParse( tor->session, &tmpInfo, &metainfo ) )
1740	{
1741	/* it's good, so keep these new trackers and free the old ones */
1742
1743	tr_info swap;
1744	swap.trackers = tor->info.trackers;
1745	swap.trackerCount = tor->info.trackerCount;
1746	tor->info.trackers = tmpInfo.trackers;
1747	tor->info.trackerCount = tmpInfo.trackerCount;
1748	tmpInfo.trackers = swap.trackers;
1749	tmpInfo.trackerCount = swap.trackerCount;
1750
1751	tr_metainfoFree( &tmpInfo );
1752	tr_bencSaveFile( tor->info.torrent, &metainfo );
1753	}
1754
1755	/* cleanup */
1756	tr_bencFree( &metainfo );
1757	}
1758	}
1759
1760	/**
1761	***
1762	**/
1763
1764	/** @deprecated this method will be removed in 1.40 */
1765	void
1766	tr_torrentSetAddedDate( tr_torrent * tor,
1767	time_t t )
1768	{
1769	tor->addedDate = t;
1770	}
1771
1772	/** @deprecated this method will be removed in 1.40 */
1773	void
1774	tr_torrentSetActivityDate( tr_torrent * tor,
1775	time_t t )
1776	{
1777	tor->activityDate = t;
1778	}
1779
1780	/** @deprecated this method will be removed in 1.40 */
1781	void
1782	tr_torrentSetDoneDate( tr_torrent * tor,
1783	time_t t )
1784	{
1785	tor->doneDate = t;
1786	}
1787
1788	/**
1789	***
1790	**/
1791
1792	uint64_t
1793	tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
1794	{
1795	const tr_file * it;
1796	const tr_file * end;
1797	struct stat sb;
1798	uint64_t bytesLeft = 0;
1799
1800	for( it=tor->info.files, end=it+tor->info.fileCount; it!=end; ++it )
1801	{
1802	if( !it->dnd )
1803	{
1804	char * path = tr_buildPath( tor->downloadDir, it->name, NULL );
1805
1806	bytesLeft += it->length;
1807
1808	if( !stat( path, &sb )
1809	&& S_ISREG( sb.st_mode )
1810	&& ( (uint64_t)sb.st_size <= it->length ) )
1811	bytesLeft -= sb.st_size;
1812
1813	tr_free( path );
1814	}
1815	}
1816
1817	return bytesLeft;
1818	}

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