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transmission/libtransmission/torrent.c

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/*
* This file Copyright (C) 2009 Charles Kerr <charles@transmissionbt.com>
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#include <sys/types.h> /* stat */
#include <sys/stat.h> /* stat */
#include <unistd.h> /* stat */
#include <dirent.h>
#include <assert.h>
#include <limits.h> /* INT_MAX */
#include <math.h> /* fabs */
#include <stdarg.h>
#include <string.h> /* memcmp */
#include <stdlib.h> /* qsort */
#include <event.h> /* evbuffer */
#include "transmission.h"
#include "session.h"
#include "bandwidth.h"
#include "bencode.h"
#include "completion.h"
#include "crypto.h" /* for tr_sha1 */
#include "resume.h"
#include "fdlimit.h" /* tr_fdTorrentClose */
#include "metainfo.h"
#include "peer-mgr.h"
#include "platform.h" /* TR_PATH_DELIMITER_STR */
#include "ptrarray.h"
#include "ratecontrol.h"
#include "torrent.h"
#include "tracker.h"
#include "trevent.h"
#include "utils.h"
#include "verify.h"
#define MAX_BLOCK_SIZE ( 1024 * 16 )
/***
****
***/
int
tr_torrentId( const tr_torrent * tor )
{
return tor->uniqueId;
}
tr_torrent*
tr_torrentFindFromId( tr_session * session, int id )
{
tr_torrent * tor = NULL;
while(( tor = tr_torrentNext( session, tor )))
if( tor->uniqueId == id )
return tor;
return NULL;
}
tr_torrent*
tr_torrentFindFromHashString( tr_session * session, const char * str )
{
tr_torrent * tor = NULL;
while(( tor = tr_torrentNext( session, tor )))
if( !strcmp( str, tor->info.hashString ) )
return tor;
return NULL;
}
tr_torrent*
tr_torrentFindFromHash( tr_session * session, const uint8_t * torrentHash )
{
tr_torrent * tor = NULL;
while(( tor = tr_torrentNext( session, tor )))
if( *tor->info.hash == *torrentHash )
if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
return tor;
return NULL;
}
tr_torrent*
tr_torrentFindFromObfuscatedHash( tr_session * session,
const uint8_t * obfuscatedTorrentHash )
{
tr_torrent * tor = NULL;
while(( tor = tr_torrentNext( session, tor )))
if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
SHA_DIGEST_LENGTH ) )
return tor;
return NULL;
}
/***
**** PER-TORRENT UL / DL SPEEDS
***/
void
tr_torrentSetSpeedLimit( tr_torrent * tor, tr_direction dir, int KiB_sec )
{
assert( tr_isTorrent( tor ) );
assert( tr_isDirection( dir ) );
if( tr_bandwidthSetDesiredSpeed( tor->bandwidth, dir, KiB_sec ) )
tr_torrentSetDirty( tor );
}
int
tr_torrentGetSpeedLimit( const tr_torrent * tor, tr_direction dir )
{
assert( tr_isTorrent( tor ) );
assert( tr_isDirection( dir ) );
return tr_bandwidthGetDesiredSpeed( tor->bandwidth, dir );
}
void
tr_torrentUseSpeedLimit( tr_torrent * tor, tr_direction dir, tr_bool do_use )
{
assert( tr_isTorrent( tor ) );
assert( tr_isDirection( dir ) );
if( tr_bandwidthSetLimited( tor->bandwidth, dir, do_use ) )
tr_torrentSetDirty( tor );
}
tr_bool
tr_torrentUsesSpeedLimit( const tr_torrent * tor, tr_direction dir )
{
assert( tr_isTorrent( tor ) );
assert( tr_isDirection( dir ) );
return tr_bandwidthIsLimited( tor->bandwidth, dir );
}
void
tr_torrentUseSessionLimits( tr_torrent * tor, tr_bool doUse )
{
tr_bool changed;
assert( tr_isTorrent( tor ) );
changed = tr_bandwidthHonorParentLimits( tor->bandwidth, TR_UP, doUse );
changed |= tr_bandwidthHonorParentLimits( tor->bandwidth, TR_DOWN, doUse );
if( changed )
tr_torrentSetDirty( tor );
}
tr_bool
tr_torrentUsesSessionLimits( const tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
return tr_bandwidthAreParentLimitsHonored( tor->bandwidth, TR_UP );
}
/***
****
***/
void
tr_torrentSetRatioMode( tr_torrent * tor, tr_ratiolimit mode )
{
assert( tr_isTorrent( tor ) );
assert( mode==TR_RATIOLIMIT_GLOBAL || mode==TR_RATIOLIMIT_SINGLE || mode==TR_RATIOLIMIT_UNLIMITED );
if( mode != tor->ratioLimitMode )
{
tor->ratioLimitMode = mode;
tor->needsSeedRatioCheck = TRUE;
tr_torrentSetDirty( tor );
}
}
tr_ratiolimit
tr_torrentGetRatioMode( const tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
return tor->ratioLimitMode;
}
void
tr_torrentSetRatioLimit( tr_torrent * tor, double desiredRatio )
{
assert( tr_isTorrent( tor ) );
if( (int)(desiredRatio*100.0) != (int)(tor->desiredRatio*100.0) )
{
tor->desiredRatio = desiredRatio;
tor->needsSeedRatioCheck = TRUE;
tr_torrentSetDirty( tor );
}
}
double
tr_torrentGetRatioLimit( const tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
return tor->desiredRatio;
}
tr_bool
tr_torrentIsPieceTransferAllowed( const tr_torrent * tor,
tr_direction direction )
{
int limit;
tr_bool allowed = TRUE;
if( tr_torrentUsesSpeedLimit( tor, direction ) )
if( tr_torrentGetSpeedLimit( tor, direction ) <= 0 )
allowed = FALSE;
if( tr_torrentUsesSessionLimits( tor ) )
if( tr_sessionGetActiveSpeedLimit( tor->session, direction, &limit ) )
if( limit <= 0 )
allowed = FALSE;
return allowed;
}
tr_bool
tr_torrentGetSeedRatio( const tr_torrent * tor, double * ratio )
{
tr_bool isLimited;
switch( tr_torrentGetRatioMode( tor ) )
{
case TR_RATIOLIMIT_SINGLE:
isLimited = TRUE;
if( ratio )
*ratio = tr_torrentGetRatioLimit( tor );
break;
case TR_RATIOLIMIT_GLOBAL:
isLimited = tr_sessionIsRatioLimited( tor->session );
if( isLimited && ratio )
*ratio = tr_sessionGetRatioLimit( tor->session );
break;
default: /* TR_RATIOLIMIT_UNLIMITED */
isLimited = FALSE;
break;
}
return isLimited;
}
/***
****
***/
void
tr_torrentSetLocalError( tr_torrent * tor, const char * fmt, ... )
{
va_list ap;
assert( tr_isTorrent( tor ) );
va_start( ap, fmt );
tor->error = TR_STAT_LOCAL_ERROR;
evutil_vsnprintf( tor->errorString, sizeof( tor->errorString ), fmt, ap );
va_end( ap );
}
static void
onTrackerResponse( void * tracker UNUSED,
void * vevent,
void * user_data )
{
tr_torrent * tor = user_data;
tr_tracker_event * event = vevent;
switch( event->messageType )
{
case TR_TRACKER_PEERS:
{
size_t i, n;
tr_pex * pex = tr_peerMgrArrayToPex( event->compact,
event->compactLen, &n );
if( event->allAreSeeds )
tr_tordbg( tor, "Got %d seeds from tracker", (int)n );
else
tr_torinf( tor, _( "Got %d peers from tracker" ), (int)n );
for( i = 0; i < n; ++i )
{
if( event->allAreSeeds )
pex[i].flags |= ADDED_F_SEED_FLAG;
tr_peerMgrAddPex( tor, TR_PEER_FROM_TRACKER, pex + i );
}
tr_free( pex );
break;
}
case TR_TRACKER_WARNING:
tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
tor->error = TR_STAT_TRACKER_WARNING;
tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
break;
case TR_TRACKER_ERROR:
tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
tor->error = TR_STAT_TRACKER_ERROR;
tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
break;
case TR_TRACKER_ERROR_CLEAR:
tor->error = TR_STAT_OK;
tor->errorString[0] = '\0';
break;
}
}
/***
****
**** TORRENT INSTANTIATION
****
***/
static int
getBytePiece( const tr_info * info,
uint64_t byteOffset )
{
assert( info );
assert( info->pieceSize != 0 );
return byteOffset / info->pieceSize;
}
static void
initFilePieces( tr_info * info,
tr_file_index_t fileIndex )
{
tr_file * file;
uint64_t firstByte, lastByte;
assert( info );
assert( fileIndex < info->fileCount );
file = &info->files[fileIndex];
firstByte = file->offset;
lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
file->firstPiece = getBytePiece( info, firstByte );
file->lastPiece = getBytePiece( info, lastByte );
}
static int
pieceHasFile( tr_piece_index_t piece,
const tr_file * file )
{
return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
}
static tr_priority_t
calculatePiecePriority( const tr_torrent * tor,
tr_piece_index_t piece,
int fileHint )
{
tr_file_index_t i;
int priority = TR_PRI_LOW;
/* find the first file that has data in this piece */
if( fileHint >= 0 ) {
i = fileHint;
while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
--i;
} else {
for( i = 0; i < tor->info.fileCount; ++i )
if( pieceHasFile( piece, &tor->info.files[i] ) )
break;
}
/* the piece's priority is the max of the priorities
* of all the files in that piece */
for( ; i < tor->info.fileCount; ++i )
{
const tr_file * file = &tor->info.files[i];
if( !pieceHasFile( piece, file ) )
break;
priority = MAX( priority, file->priority );
/* when dealing with multimedia files, getting the first and
last pieces can sometimes allow you to preview it a bit
before it's fully downloaded... */
if( file->priority >= TR_PRI_NORMAL )
if( file->firstPiece == piece || file->lastPiece == piece )
priority = TR_PRI_HIGH;
}
return priority;
}
static void
tr_torrentInitFilePieces( tr_torrent * tor )
{
tr_file_index_t f;
tr_piece_index_t p;
uint64_t offset = 0;
tr_info * inf = &tor->info;
int * firstFiles;
/* assign the file offsets */
for( f=0; f<inf->fileCount; ++f ) {
inf->files[f].offset = offset;
offset += inf->files[f].length;
initFilePieces( inf, f );
}
/* build the array of first-file hints to give calculatePiecePriority */
firstFiles = tr_new( int, inf->pieceCount );
for( p=f=0; p<inf->pieceCount; ++p ) {
while( inf->files[f].lastPiece < p )
++f;
firstFiles[p] = f;
}
#if 0
/* test to confirm the first-file hints are correct */
for( p=0; p<inf->pieceCount; ++p ) {
f = firstFiles[p];
assert( inf->files[f].firstPiece <= p );
assert( inf->files[f].lastPiece >= p );
if( f > 0 )
assert( inf->files[f-1].lastPiece < p );
for( f=0; f<inf->fileCount; ++f )
if( pieceHasFile( p, &inf->files[f] ) )
break;
assert( (int)f == firstFiles[p] );
}
#endif
for( p=0; p<inf->pieceCount; ++p )
inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
tr_free( firstFiles );
}
int
tr_torrentPromoteTracker( tr_torrent * tor,
int pos )
{
int i;
int tier;
assert( tor );
assert( ( 0 <= pos ) && ( pos < tor->info.trackerCount ) );
/* the tier of the tracker we're promoting */
tier = tor->info.trackers[pos].tier;
/* find the index of that tier's first tracker */
for( i = 0; i < tor->info.trackerCount; ++i )
if( tor->info.trackers[i].tier == tier )
break;
assert( i < tor->info.trackerCount );
/* promote the tracker at `pos' to the front of the tier */
if( i != pos )
{
const tr_tracker_info tmp = tor->info.trackers[i];
tor->info.trackers[i] = tor->info.trackers[pos];
tor->info.trackers[pos] = tmp;
}
/* return the new position of the tracker that started out at [pos] */
return i;
}
struct RandomTracker
{
tr_tracker_info tracker;
int random_value;
};
/* the tiers will be sorted from lowest to highest,
* and trackers are randomized within the tiers */
static TR_INLINE int
compareRandomTracker( const void * va,
const void * vb )
{
const struct RandomTracker * a = va;
const struct RandomTracker * b = vb;
if( a->tracker.tier != b->tracker.tier )
return a->tracker.tier - b->tracker.tier;
return a->random_value - b->random_value;
}
static void
randomizeTiers( tr_info * info )
{
int i;
const int n = info->trackerCount;
struct RandomTracker * r = tr_new0( struct RandomTracker, n );
for( i = 0; i < n; ++i )
{
r[i].tracker = info->trackers[i];
r[i].random_value = tr_cryptoRandInt( INT_MAX );
}
qsort( r, n, sizeof( struct RandomTracker ), compareRandomTracker );
for( i = 0; i < n; ++i )
info->trackers[i] = r[i].tracker;
tr_free( r );
}
static void torrentStart( tr_torrent * tor );
/**
* Decide on a block size. constraints:
* (1) most clients decline requests over 16 KiB
* (2) pieceSize must be a multiple of block size
*/
static uint32_t
getBlockSize( uint32_t pieceSize )
{
uint32_t b = pieceSize;
while( b > MAX_BLOCK_SIZE )
b /= 2u;
if( !b || ( pieceSize % b ) ) /* not cleanly divisible */
return 0;
return b;
}
static void
torrentRealInit( tr_torrent * tor, const tr_ctor * ctor )
{
int doStart;
uint64_t loaded;
uint64_t t;
const char * dir;
static int nextUniqueId = 1;
tr_info * info = &tor->info;
tr_session * session = tr_ctorGetSession( ctor );
assert( session != NULL );
tr_globalLock( session );
tor->session = session;
tor->uniqueId = nextUniqueId++;
tor->magicNumber = TORRENT_MAGIC_NUMBER;
randomizeTiers( info );
tor->bandwidth = tr_bandwidthNew( session, session->bandwidth );
tor->blockSize = getBlockSize( info->pieceSize );
if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) ||
!tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
tor->downloadDir = tr_strdup( dir );
tor->lastPieceSize = info->totalSize % info->pieceSize;
if( !tor->lastPieceSize )
tor->lastPieceSize = info->pieceSize;
tor->lastBlockSize = info->totalSize % tor->blockSize;
if( !tor->lastBlockSize )
tor->lastBlockSize = tor->blockSize;
tor->blockCount =
( info->totalSize + tor->blockSize - 1 ) / tor->blockSize;
tor->blockCountInPiece =
info->pieceSize / tor->blockSize;
tor->blockCountInLastPiece =
( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize;
/* check our work */
assert( ( info->pieceSize % tor->blockSize ) == 0 );
t = info->pieceCount - 1;
t *= info->pieceSize;
t += tor->lastPieceSize;
assert( t == info->totalSize );
t = tor->blockCount - 1;
t *= tor->blockSize;
t += tor->lastBlockSize;
assert( t == info->totalSize );
t = info->pieceCount - 1;
t *= tor->blockCountInPiece;
t += tor->blockCountInLastPiece;
assert( t == (uint64_t)tor->blockCount );
tr_cpConstruct( &tor->completion, tor );
tr_torrentInitFilePieces( tor );
tr_rcConstruct( &tor->swarmSpeed );
tr_sha1( tor->obfuscatedHash, "req2", 4,
info->hash, SHA_DIGEST_LENGTH,
NULL );
tr_peerMgrAddTorrent( session->peerMgr, tor );
assert( !tor->downloadedCur );
assert( !tor->uploadedCur );
tr_ctorInitTorrentPriorities( ctor, tor );
tr_ctorInitTorrentWanted( ctor, tor );
tor->error = TR_STAT_OK;
tr_bitfieldConstruct( &tor->checkedPieces, tor->info.pieceCount );
tr_torrentUncheck( tor );
tr_torrentSetAddedDate( tor, time( NULL ) ); /* this is a default value to be
overwritten by the resume file */
loaded = tr_torrentLoadResume( tor, ~0, ctor );
doStart = tor->isRunning;
tor->isRunning = 0;
if( !( loaded & TR_FR_SPEEDLIMIT ) )
{
tr_torrentUseSpeedLimit( tor, TR_UP, FALSE );
tr_torrentSetSpeedLimit( tor, TR_UP, tr_sessionGetSpeedLimit( tor->session, TR_UP ) );
tr_torrentUseSpeedLimit( tor, TR_DOWN, FALSE );
tr_torrentSetSpeedLimit( tor, TR_DOWN, tr_sessionGetSpeedLimit( tor->session, TR_DOWN ) );
tr_torrentUseSessionLimits( tor, TRUE );
}
if( !( loaded & TR_FR_RATIOLIMIT ) )
{
tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
}
tor->completeness = tr_cpGetStatus( &tor->completion );
tor->tracker = tr_trackerNew( tor );
tor->trackerSubscription =
tr_trackerSubscribe( tor->tracker, onTrackerResponse,
tor );
{
tr_torrent * it = NULL;
tr_torrent * last = NULL;
while( ( it = tr_torrentNext( session, it ) ) )
last = it;
if( !last )
session->torrentList = tor;
else
last->next = tor;
++session->torrentCount;
}
tr_globalUnlock( session );
/* maybe save our own copy of the metainfo */
if( tr_ctorGetSave( ctor ) )
{
const tr_benc * val;
if( !tr_ctorGetMetainfo( ctor, &val ) )
{
const char * filename = tor->info.torrent;
tr_bencToFile( val, TR_FMT_BENC, filename );
tr_sessionSetTorrentFile( tor->session, tor->info.hashString, filename );
}
}
tr_metainfoMigrate( session, &tor->info );
if( doStart )
torrentStart( tor );
}
tr_parse_result
tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
{
int doFree;
tr_bool didParse;
tr_info tmp;
const tr_benc * metainfo;
tr_session * session = tr_ctorGetSession( ctor );
tr_parse_result result = TR_PARSE_OK;
if( setmeInfo == NULL )
setmeInfo = &tmp;
memset( setmeInfo, 0, sizeof( tr_info ) );
if( tr_ctorGetMetainfo( ctor, &metainfo ) )
return TR_PARSE_ERR;
didParse = tr_metainfoParse( session, setmeInfo, metainfo );
doFree = didParse && ( setmeInfo == &tmp );
if( didParse && !getBlockSize( setmeInfo->pieceSize ) )
result = TR_PARSE_ERR;
if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
result = TR_PARSE_DUPLICATE;
if( doFree )
tr_metainfoFree( setmeInfo );
return result;
}
tr_torrent *
tr_torrentNew( const tr_ctor * ctor,
int * setmeError )
{
int err;
tr_info tmpInfo;
tr_torrent * tor = NULL;
assert( ctor != NULL );
assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
err = tr_torrentParse( ctor, &tmpInfo );
if( !err )
{
tor = tr_new0( tr_torrent, 1 );
tor->info = tmpInfo;
torrentRealInit( tor, ctor );
}
else if( setmeError )
{
*setmeError = err;
}
return tor;
}
/**
***
**/
void
tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
{
assert( tr_isTorrent( tor ) );
if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
{
tr_free( tor->downloadDir );
tor->downloadDir = tr_strdup( path );
tr_torrentSetDirty( tor );
}
}
const char*
tr_torrentGetDownloadDir( const tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
return tor->downloadDir;
}
void
tr_torrentChangeMyPort( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
if( tor->tracker )
tr_trackerChangeMyPort( tor->tracker );
}
static TR_INLINE void
tr_torrentManualUpdateImpl( void * vtor )
{
tr_torrent * tor = vtor;
assert( tr_isTorrent( tor ) );
if( tor->isRunning )
tr_trackerReannounce( tor->tracker );
}
void
tr_torrentManualUpdate( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
}
tr_bool
tr_torrentCanManualUpdate( const tr_torrent * tor )
{
return ( tr_isTorrent( tor ) )
&& ( tor->isRunning )
&& ( tr_trackerCanManualAnnounce( tor->tracker ) );
}
const tr_info *
tr_torrentInfo( const tr_torrent * tor )
{
return tr_isTorrent( tor ) ? &tor->info : NULL;
}
const tr_stat *
tr_torrentStatCached( tr_torrent * tor )
{
const time_t now = time( NULL );
return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
? &tor->stats
: tr_torrentStat( tor );
}
void
tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
{
assert( tr_isTorrent( tor ) );
assert( state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW );
tor->verifyState = state;
tor->anyDate = time( NULL );
}
tr_torrent_activity
tr_torrentGetActivity( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
tr_torrentRecheckCompleteness( tor );
if( tor->verifyState == TR_VERIFY_NOW )
return TR_STATUS_CHECK;
if( tor->verifyState == TR_VERIFY_WAIT )
return TR_STATUS_CHECK_WAIT;
if( !tor->isRunning )
return TR_STATUS_STOPPED;
if( tor->completeness == TR_LEECH )
return TR_STATUS_DOWNLOAD;
return TR_STATUS_SEED;
}
const tr_stat *
tr_torrentStat( tr_torrent * tor )
{
tr_stat * s;
struct tr_tracker * tc;
const tr_tracker_info * ti;
int usableSeeds = 0;
uint64_t now;
double downloadedForRatio, seedRatio=0;
double d;
tr_bool checkSeedRatio;
if( !tor )
return NULL;
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
tor->lastStatTime = time( NULL );
s = &tor->stats;
s->id = tor->uniqueId;
s->activity = tr_torrentGetActivity( tor );
s->error = tor->error;
memcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
tc = tor->tracker;
ti = tr_trackerGetAddress( tor->tracker, tor );
s->announceURL = ti ? ti->announce : NULL;
s->scrapeURL = ti ? ti->scrape : NULL;
tr_trackerStat( tc, s );
tr_trackerGetCounts( tc, &s->timesCompleted,
&s->leechers,
&s->seeders,
&s->downloaders );
tr_peerMgrTorrentStats( tor,
&s->peersKnown,
&s->peersConnected,
&usableSeeds,
&s->webseedsSendingToUs,
&s->peersSendingToUs,
&s->peersGettingFromUs,
s->peersFrom );
now = tr_date( );
d = tr_peerMgrGetWebseedSpeed( tor, now );
s->swarmSpeed = tr_rcRate( &tor->swarmSpeed, now );
s->rawUploadSpeed = tr_bandwidthGetRawSpeed ( tor->bandwidth, now, TR_UP );
s->pieceUploadSpeed = tr_bandwidthGetPieceSpeed( tor->bandwidth, now, TR_UP );
s->rawDownloadSpeed = d + tr_bandwidthGetRawSpeed ( tor->bandwidth, now, TR_DOWN );
s->pieceDownloadSpeed = d + tr_bandwidthGetPieceSpeed( tor->bandwidth, now, TR_DOWN );
usableSeeds += tor->info.webseedCount;
s->percentComplete = tr_cpPercentComplete ( &tor->completion );
s->percentDone = tr_cpPercentDone ( &tor->completion );
s->leftUntilDone = tr_cpLeftUntilDone( &tor->completion );
s->sizeWhenDone = tr_cpSizeWhenDone ( &tor->completion );
s->recheckProgress = s->activity == TR_STATUS_CHECK
? 1.0 -
( tr_torrentCountUncheckedPieces( tor ) /
(double) tor->info.pieceCount )
: 0.0;
s->activityDate = tor->activityDate;
s->addedDate = tor->addedDate;
s->doneDate = tor->doneDate;
s->startDate = tor->startDate;
s->corruptEver = tor->corruptCur + tor->corruptPrev;
s->downloadedEver = tor->downloadedCur + tor->downloadedPrev;
s->uploadedEver = tor->uploadedCur + tor->uploadedPrev;
s->haveValid = tr_cpHaveValid( &tor->completion );
s->haveUnchecked = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
if( usableSeeds > 0 )
{
s->desiredAvailable = s->leftUntilDone;
}
else if( !s->leftUntilDone || !s->peersConnected )
{
s->desiredAvailable = 0;
}
else
{
tr_piece_index_t i;
tr_bitfield * peerPieces = tr_peerMgrGetAvailable( tor );
s->desiredAvailable = 0;
for( i = 0; i < tor->info.pieceCount; ++i )
if( !tor->info.pieces[i].dnd && tr_bitfieldHasFast( peerPieces, i ) )
s->desiredAvailable += tr_cpMissingBlocksInPiece( &tor->completion, i );
s->desiredAvailable *= tor->blockSize;
tr_bitfieldFree( peerPieces );
}
downloadedForRatio = s->downloadedEver ? s->downloadedEver : s->haveValid;
s->ratio = tr_getRatio( s->uploadedEver, downloadedForRatio );
checkSeedRatio = tr_torrentGetSeedRatio( tor, &seedRatio );
switch( s->activity )
{
case TR_STATUS_DOWNLOAD:
if( s->leftUntilDone > s->desiredAvailable )
s->eta = TR_ETA_NOT_AVAIL;
else if( s->pieceDownloadSpeed < 0.1 )
s->eta = TR_ETA_UNKNOWN;
else {
/* etaSpeed exists because if we pieceDownloadSpeed directly,
* brief fluctuations cause the ETA to jump all over the place.
* so, etaSpeed is a smoothed-out version of pieceDownloadSpeed
* to dampen the effect of fluctuations */
if( ( tor->etaSpeedCalculatedAt + 800 ) < now ) {
tor->etaSpeedCalculatedAt = now;
tor->etaSpeed = (fabs(tor->etaSpeed)<0.0001)
? s->pieceDownloadSpeed /* if no previous speed, no need to smooth */
: 0.8*tor->etaSpeed + 0.2*s->pieceDownloadSpeed; /* smooth across 5 readings */
}
s->eta = s->leftUntilDone / tor->etaSpeed / 1024.0;
}
break;
case TR_STATUS_SEED:
if( checkSeedRatio )
{
if( s->pieceUploadSpeed < 0.1 )
s->eta = TR_ETA_UNKNOWN;
else
s->eta = (downloadedForRatio * (seedRatio - s->ratio)) / s->pieceUploadSpeed / 1024.0;
}
else
s->eta = TR_ETA_NOT_AVAIL;
break;
default:
s->eta = TR_ETA_NOT_AVAIL;
break;
}
if( !checkSeedRatio || s->ratio >= seedRatio || s->ratio == TR_RATIO_INF )
s->percentRatio = 1.0;
else if( s->ratio == TR_RATIO_NA )
s->percentRatio = 0.0;
else
s->percentRatio = s->ratio / seedRatio;
tr_torrentUnlock( tor );
return s;
}
/***
****
***/
static uint64_t
fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
{
uint64_t total = 0;
const tr_file * f = &tor->info.files[index];
if( f->length )
{
const tr_block_index_t firstBlock = f->offset / tor->blockSize;
const uint64_t lastByte = f->offset + f->length - 1;
const tr_block_index_t lastBlock = lastByte / tor->blockSize;
if( firstBlock == lastBlock )
{
if( tr_cpBlockIsCompleteFast( &tor->completion, firstBlock ) )
total = f->length;
}
else
{
uint32_t i;
/* the first block */
if( tr_cpBlockIsCompleteFast( &tor->completion, firstBlock ) )
total += tor->blockSize - ( f->offset % tor->blockSize );
/* the middle blocks */
if( f->firstPiece == f->lastPiece )
{
for( i=firstBlock+1; i<lastBlock; ++i )
if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
total += tor->blockSize;
}
else
{
int64_t b = 0;
const tr_block_index_t firstBlockOfLastPiece
= tr_torPieceFirstBlock( tor, f->lastPiece );
const tr_block_index_t lastBlockOfFirstPiece
= tr_torPieceFirstBlock( tor, f->firstPiece )
+ tr_torPieceCountBlocks( tor, f->firstPiece ) - 1;
/* the rest of the first piece */
for( i=firstBlock+1; i<lastBlock && i<=lastBlockOfFirstPiece; ++i )
if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
++b;
/* the middle pieces */
if( f->firstPiece + 1 < f->lastPiece )
for( i=f->firstPiece+1; i<f->lastPiece; ++i )
b += tor->blockCountInPiece - tr_cpMissingBlocksInPiece( &tor->completion, i );
/* the rest of the last piece */
for( i=firstBlockOfLastPiece; i<lastBlock; ++i )
if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
++b;
b *= tor->blockSize;
total += b;
}
/* the last block */
if( tr_cpBlockIsCompleteFast( &tor->completion, lastBlock ) )
total += ( f->offset + f->length ) - ( tor->blockSize * lastBlock );
}
}
return total;
}
tr_file_stat *
tr_torrentFiles( const tr_torrent * tor,
tr_file_index_t * fileCount )
{
tr_file_index_t i;
const tr_file_index_t n = tor->info.fileCount;
tr_file_stat * files = tr_new0( tr_file_stat, n );
tr_file_stat * walk = files;
const tr_bool isSeed = tor->completeness == TR_SEED;
assert( tr_isTorrent( tor ) );
for( i = 0; i < n; ++i, ++walk )
{
const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
walk->bytesCompleted = b;
walk->progress = tr_getRatio( b, tor->info.files[i].length );
}
if( fileCount )
*fileCount = n;
return files;
}
void
tr_torrentFilesFree( tr_file_stat * files,
tr_file_index_t fileCount UNUSED )
{
tr_free( files );
}
/***
****
***/
float*
tr_torrentWebSpeeds( const tr_torrent * tor )
{
return tr_isTorrent( tor )
? tr_peerMgrWebSpeeds( tor )
: NULL;
}
tr_peer_stat *
tr_torrentPeers( const tr_torrent * tor,
int * peerCount )
{
tr_peer_stat * ret = NULL;
if( tr_isTorrent( tor ) )
ret = tr_peerMgrPeerStats( tor, peerCount );
return ret;
}
void
tr_torrentPeersFree( tr_peer_stat * peers,
int peerCount UNUSED )
{
tr_free( peers );
}
void
tr_torrentAvailability( const tr_torrent * tor,
int8_t * tab,
int size )
{
tr_peerMgrTorrentAvailability( tor, tab, size );
}
void
tr_torrentAmountFinished( const tr_torrent * tor,
float * tab,
int size )
{
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
tr_cpGetAmountDone( &tor->completion, tab, size );
tr_torrentUnlock( tor );
}
void
tr_torrentResetTransferStats( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
tor->downloadedPrev += tor->downloadedCur;
tor->downloadedCur = 0;
tor->uploadedPrev += tor->uploadedCur;
tor->uploadedCur = 0;
tor->corruptPrev += tor->corruptCur;
tor->corruptCur = 0;
tr_torrentSetDirty( tor );
tr_torrentUnlock( tor );
}
void
tr_torrentSetHasPiece( tr_torrent * tor,
tr_piece_index_t pieceIndex,
tr_bool has )
{
assert( tr_isTorrent( tor ) );
assert( pieceIndex < tor->info.pieceCount );
if( has )
tr_cpPieceAdd( &tor->completion, pieceIndex );
else
tr_cpPieceRem( &tor->completion, pieceIndex );
}
/***
****
***/
static void
freeTorrent( tr_torrent * tor )
{
tr_torrent * t;
tr_session * session = tor->session;
tr_info * inf = &tor->info;
assert( tr_isTorrent( tor ) );
assert( !tor->isRunning );
tr_globalLock( session );
tr_peerMgrRemoveTorrent( tor );
tr_cpDestruct( &tor->completion );
tr_rcDestruct( &tor->swarmSpeed );
tr_trackerUnsubscribe( tor->tracker, tor->trackerSubscription );
tr_trackerFree( tor->tracker );
tor->tracker = NULL;
tr_bitfieldDestruct( &tor->checkedPieces );
tr_free( tor->downloadDir );
tr_free( tor->peer_id );
if( tor == session->torrentList )
session->torrentList = tor->next;
else for( t = session->torrentList; t != NULL; t = t->next ) {
if( t->next == tor ) {
t->next = tor->next;
break;
}
}
assert( session->torrentCount >= 1 );
session->torrentCount--;
tr_bandwidthFree( tor->bandwidth );
tr_metainfoFree( inf );
tr_free( tor );
tr_globalUnlock( session );
}
/**
*** Start/Stop Callback
**/
static void
checkAndStartImpl( void * vtor )
{
tr_torrent * tor = vtor;
assert( tr_isTorrent( tor ) );
tr_globalLock( tor->session );
/** If we had local data before, but it's disappeared,
stop the torrent and log an error. */
if( tor->preVerifyTotal && !tr_cpHaveTotal( &tor->completion ) )
{
tr_torrentSetLocalError( tor, _( "Can't find local data. Try \"Set Location\" to find it, or restart the torrent to re-download." ) );
tr_torrentStop( tor );
}
else
{
const time_t now = time( NULL );
tor->isRunning = TRUE;
tor->needsSeedRatioCheck = TRUE;
tor->error = TR_STAT_OK;
tor->errorString[0] = '\0';
tor->completeness = tr_cpGetStatus( &tor->completion );
tor->startDate = tor->anyDate = now;
tr_torrentResetTransferStats( tor );
tr_trackerStart( tor->tracker );
tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
tr_peerMgrStartTorrent( tor );
}
tr_globalUnlock( tor->session );
}
static void
checkAndStartCB( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
assert( tr_isSession( tor->session ) );
tr_runInEventThread( tor->session, checkAndStartImpl, tor );
}
static void
torrentStart( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
tr_globalLock( tor->session );
if( !tor->isRunning )
{
tr_verifyRemove( tor );
tor->isRunning = 1;
tor->preVerifyTotal = tr_cpHaveTotal( &tor->completion );
tr_verifyAdd( tor, checkAndStartCB );
}
tr_globalUnlock( tor->session );
}
void
tr_torrentStart( tr_torrent * tor )
{
if( tr_isTorrent( tor ) )
torrentStart( tor );
}
static void
torrentRecheckDoneImpl( void * vtor )
{
tr_torrent * tor = vtor;
assert( tr_isTorrent( tor ) );
tr_torrentRecheckCompleteness( tor );
if( tor->preVerifyTotal && !tr_cpHaveTotal( &tor->completion ) )
{
tr_torrentSetLocalError( tor, _( "Can't find local data. Try \"Set Location\" to find it, or restart the torrent to re-download." ) );
tr_torrentStop( tor );
}
else if( tor->startAfterVerify )
{
tor->startAfterVerify = FALSE;
tr_torrentStart( tor );
}
}
static void
torrentRecheckDoneCB( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
}
static void
verifyTorrent( void * vtor )
{
tr_torrent * tor = vtor;
assert( tr_isTorrent( tor ) );
tr_globalLock( tor->session );
/* if the torrent's already being verified, stop it */
tr_verifyRemove( tor );
/* if the torrent's running, stop it & set the restart-after-verify flag */
if( tor->startAfterVerify || tor->isRunning ) {
tr_torrentStop( tor );
tor->startAfterVerify = TRUE;
}
/* add the torrent to the recheck queue */
tor->preVerifyTotal = tr_cpHaveTotal( &tor->completion );
tr_torrentUncheck( tor );
tr_verifyAdd( tor, torrentRecheckDoneCB );
tr_globalUnlock( tor->session );
}
void
tr_torrentVerify( tr_torrent * tor )
{
if( tr_isTorrent( tor ) )
tr_runInEventThread( tor->session, verifyTorrent, tor );
}
void
tr_torrentSave( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
if( tor->isDirty ) {
tor->isDirty = FALSE;
tr_torrentSaveResume( tor );
}
}
static void
stopTorrent( void * vtor )
{
tr_torrent * tor = vtor;
assert( tr_isTorrent( tor ) );
tr_verifyRemove( tor );
tr_peerMgrStopTorrent( tor );
tr_trackerStop( tor->tracker );
tr_fdTorrentClose( tor->uniqueId );
if( !tor->isDeleting )
tr_torrentSave( tor );
}
void
tr_torrentStop( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
if( tr_isTorrent( tor ) )
{
tr_globalLock( tor->session );
tor->isRunning = 0;
tr_runInEventThread( tor->session, stopTorrent, tor );
tr_globalUnlock( tor->session );
}
}
static void
closeTorrent( void * vtor )
{
tr_benc * d;
tr_torrent * tor = vtor;
assert( tr_isTorrent( tor ) );
d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
tr_bencDictAddInt( d, "id", tor->uniqueId );
tr_bencDictAddInt( d, "date", time( NULL ) );
stopTorrent( tor );
if( tor->isDeleting )
{
tr_metainfoRemoveSaved( tor->session, &tor->info );
tr_torrentRemoveResume( tor );
}
tor->isRunning = 0;
freeTorrent( tor );
}
void
tr_torrentFree( tr_torrent * tor )
{
if( tr_isTorrent( tor ) )
{
tr_session * session = tor->session;
assert( tr_isSession( session ) );
tr_globalLock( session );
tr_torrentClearCompletenessCallback( tor );
tr_runInEventThread( session, closeTorrent, tor );
tr_globalUnlock( session );
}
}
void
tr_torrentRemove( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
tor->isDeleting = 1;
tr_torrentFree( tor );
}
/**
*** Completeness
**/
static const char *
getCompletionString( int type )
{
switch( type )
{
/* Translators: this is a minor point that's safe to skip over, but FYI:
"Complete" and "Done" are specific, different terms in Transmission:
"Complete" means we've downloaded every file in the torrent.
"Done" means we're done downloading the files we wanted, but NOT all
that exist */
case TR_PARTIAL_SEED:
return _( "Done" );
case TR_SEED:
return _( "Complete" );
default:
return _( "Incomplete" );
}
}
static void
fireCompletenessChange( tr_torrent * tor,
tr_completeness status )
{
assert( tr_isTorrent( tor ) );
assert( ( status == TR_LEECH )
|| ( status == TR_SEED )
|| ( status == TR_PARTIAL_SEED ) );
if( tor->completeness_func )
tor->completeness_func( tor, status, tor->completeness_func_user_data );
}
void
tr_torrentSetCompletenessCallback( tr_torrent * tor,
tr_torrent_completeness_func func,
void * user_data )
{
assert( tr_isTorrent( tor ) );
tor->completeness_func = func;
tor->completeness_func_user_data = user_data;
}
void
tr_torrentSetRatioLimitHitCallback( tr_torrent * tor,
tr_torrent_ratio_limit_hit_func func,
void * user_data )
{
assert( tr_isTorrent( tor ) );
tor->ratio_limit_hit_func = func;
tor->ratio_limit_hit_func_user_data = user_data;
}
void
tr_torrentClearCompletenessCallback( tr_torrent * torrent )
{
tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
}
void
tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
{
tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
}
void
tr_torrentRecheckCompleteness( tr_torrent * tor )
{
tr_completeness completeness;
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
completeness = tr_cpGetStatus( &tor->completion );
if( completeness != tor->completeness )
{
const int recentChange = tor->downloadedCur != 0;
if( recentChange )
{
tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
getCompletionString( tor->completeness ),
getCompletionString( completeness ) );
}
tor->completeness = completeness;
tor->needsSeedRatioCheck = TRUE;
tr_fdTorrentClose( tor->uniqueId );
fireCompletenessChange( tor, completeness );
if( recentChange && ( completeness == TR_SEED ) )
{
tr_trackerCompleted( tor->tracker );
tor->doneDate = tor->anyDate = time( NULL );
}
tr_torrentSetDirty( tor );
}
tr_torrentUnlock( tor );
}
/**
*** File priorities
**/
void
tr_torrentInitFilePriority( tr_torrent * tor,
tr_file_index_t fileIndex,
tr_priority_t priority )
{
tr_piece_index_t i;
tr_file * file;
assert( tr_isTorrent( tor ) );
assert( fileIndex < tor->info.fileCount );
assert( tr_isPriority( priority ) );
file = &tor->info.files[fileIndex];
file->priority = priority;
for( i = file->firstPiece; i <= file->lastPiece; ++i )
tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
}
void
tr_torrentSetFilePriorities( tr_torrent * tor,
tr_file_index_t * files,
tr_file_index_t fileCount,
tr_priority_t priority )
{
tr_file_index_t i;
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
for( i = 0; i < fileCount; ++i )
tr_torrentInitFilePriority( tor, files[i], priority );
tr_torrentSetDirty( tor );
tr_torrentUnlock( tor );
}
tr_priority_t
tr_torrentGetFilePriority( const tr_torrent * tor,
tr_file_index_t file )
{
tr_priority_t ret;
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
assert( tor );
assert( file < tor->info.fileCount );
ret = tor->info.files[file].priority;
tr_torrentUnlock( tor );
return ret;
}
tr_priority_t*
tr_torrentGetFilePriorities( const tr_torrent * tor )
{
tr_file_index_t i;
tr_priority_t * p;
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
p = tr_new0( tr_priority_t, tor->info.fileCount );
for( i = 0; i < tor->info.fileCount; ++i )
p[i] = tor->info.files[i].priority;
tr_torrentUnlock( tor );
return p;
}
/**
*** File DND
**/
int
tr_torrentGetFileDL( const tr_torrent * tor,
tr_file_index_t file )
{
int doDownload;
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
assert( file < tor->info.fileCount );
doDownload = !tor->info.files[file].dnd;
tr_torrentUnlock( tor );
return doDownload != 0;
}
static void
setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
{
tr_file * file;
const int dnd = !doDownload;
tr_piece_index_t firstPiece, firstPieceDND;
tr_piece_index_t lastPiece, lastPieceDND;
tr_file_index_t i;
assert( tr_isTorrent( tor ) );
file = &tor->info.files[fileIndex];
file->dnd = dnd;
firstPiece = file->firstPiece;
lastPiece = file->lastPiece;
/* can't set the first piece to DND unless
every file using that piece is DND */
firstPieceDND = dnd;
if( fileIndex > 0 )
{
for( i = fileIndex - 1; firstPieceDND; --i )
{
if( tor->info.files[i].lastPiece != firstPiece )
break;
firstPieceDND = tor->info.files[i].dnd;
if( !i )
break;
}
}
/* can't set the last piece to DND unless
every file using that piece is DND */
lastPieceDND = dnd;
for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
{
if( tor->info.files[i].firstPiece != lastPiece )
break;
lastPieceDND = tor->info.files[i].dnd;
}
if( firstPiece == lastPiece )
{
tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
}
else
{
tr_piece_index_t pp;
tor->info.pieces[firstPiece].dnd = firstPieceDND;
tor->info.pieces[lastPiece].dnd = lastPieceDND;
for( pp = firstPiece + 1; pp < lastPiece; ++pp )
tor->info.pieces[pp].dnd = dnd;
}
}
void
tr_torrentInitFileDLs( tr_torrent * tor,
tr_file_index_t * files,
tr_file_index_t fileCount,
tr_bool doDownload )
{
tr_file_index_t i;
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
for( i=0; i<fileCount; ++i )
setFileDND( tor, files[i], doDownload );
tr_cpInvalidateDND( &tor->completion );
tor->needsSeedRatioCheck = TRUE;
tr_torrentUnlock( tor );
}
void
tr_torrentSetFileDLs( tr_torrent * tor,
tr_file_index_t * files,
tr_file_index_t fileCount,
tr_bool doDownload )
{
assert( tr_isTorrent( tor ) );
tr_torrentLock( tor );
tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
tr_torrentSetDirty( tor );
tr_torrentUnlock( tor );
}
/***
****
***/
tr_priority_t
tr_torrentGetPriority( const tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
return tor->bandwidth->priority;
}
void
tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
{
assert( tr_isTorrent( tor ) );
assert( tr_isPriority( priority ) );
if( tor->bandwidth->priority != priority )
{
tor->bandwidth->priority = priority;
tr_torrentSetDirty( tor );
}
}
/***
****
***/
void
tr_torrentSetPeerLimit( tr_torrent * tor,
uint16_t maxConnectedPeers )
{
assert( tr_isTorrent( tor ) );
tor->maxConnectedPeers = maxConnectedPeers;
}
uint16_t
tr_torrentGetPeerLimit( const tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
return tor->maxConnectedPeers;
}
/***
****
***/
tr_block_index_t
_tr_block( const tr_torrent * tor,
tr_piece_index_t index,
uint32_t offset )
{
tr_block_index_t ret;
assert( tr_isTorrent( tor ) );
ret = index;
ret *= ( tor->info.pieceSize / tor->blockSize );
ret += offset / tor->blockSize;
return ret;
}
tr_bool
tr_torrentReqIsValid( const tr_torrent * tor,
tr_piece_index_t index,
uint32_t offset,
uint32_t length )
{
int err = 0;
assert( tr_isTorrent( tor ) );
if( index >= tor->info.pieceCount )
err = 1;
else if( length < 1 )
err = 2;
else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
err = 3;
else if( length > MAX_BLOCK_SIZE )
err = 4;
else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
err = 5;
if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
(unsigned long)index,
(unsigned long)offset,
(unsigned long)length,
err );
return !err;
}
uint64_t
tr_pieceOffset( const tr_torrent * tor,
tr_piece_index_t index,
uint32_t offset,
uint32_t length )
{
uint64_t ret;
assert( tr_isTorrent( tor ) );
ret = tor->info.pieceSize;
ret *= index;
ret += offset;
ret += length;
return ret;
}
/***
****
***/
void
tr_torrentSetPieceChecked( tr_torrent * tor,
tr_piece_index_t piece,
tr_bool isChecked )
{
assert( tr_isTorrent( tor ) );
if( isChecked )
tr_bitfieldAdd( &tor->checkedPieces, piece );
else
tr_bitfieldRem( &tor->checkedPieces, piece );
}
void
tr_torrentSetFileChecked( tr_torrent * tor,
tr_file_index_t fileIndex,
tr_bool isChecked )
{
const tr_file * file = &tor->info.files[fileIndex];
const tr_piece_index_t begin = file->firstPiece;
const tr_piece_index_t end = file->lastPiece + 1;
assert( tr_isTorrent( tor ) );
if( isChecked )
tr_bitfieldAddRange( &tor->checkedPieces, begin, end );
else
tr_bitfieldRemRange( &tor->checkedPieces, begin, end );
}
tr_bool
tr_torrentIsFileChecked( const tr_torrent * tor,
tr_file_index_t fileIndex )
{
const tr_file * file = &tor->info.files[fileIndex];
const tr_piece_index_t begin = file->firstPiece;
const tr_piece_index_t end = file->lastPiece + 1;
tr_piece_index_t i;
tr_bool isChecked = TRUE;
assert( tr_isTorrent( tor ) );
for( i = begin; isChecked && i < end; ++i )
if( !tr_torrentIsPieceChecked( tor, i ) )
isChecked = FALSE;
return isChecked;
}
void
tr_torrentUncheck( tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
tr_bitfieldRemRange( &tor->checkedPieces, 0, tor->info.pieceCount );
}
int
tr_torrentCountUncheckedPieces( const tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
return tor->info.pieceCount - tr_bitfieldCountTrueBits( &tor->checkedPieces );
}
time_t*
tr_torrentGetMTimes( const tr_torrent * tor,
size_t * setme_n )
{
size_t i;
const size_t n = tor->info.fileCount;
time_t * m = tr_new0( time_t, n );
assert( tr_isTorrent( tor ) );
for( i = 0; i < n; ++i )
{
struct stat sb;
char * path = tr_buildPath( tor->downloadDir, tor->info.files[i].name, NULL );
if( !stat( path, &sb ) )
{
#ifdef SYS_DARWIN
m[i] = sb.st_mtimespec.tv_sec;
#else
m[i] = sb.st_mtime;
#endif
}
tr_free( path );
}
*setme_n = n;
return m;
}
/***
****
***/
void
tr_torrentSetAnnounceList( tr_torrent * tor,
const tr_tracker_info * trackers,
int trackerCount )
{
tr_benc metainfo;
assert( tr_isTorrent( tor ) );
/* save to the .torrent file */
if( !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
{
int i;
int prevTier = -1;
tr_benc * tier = NULL;
tr_benc * announceList;
tr_info tmpInfo;
/* remove the old fields */
tr_bencDictRemove( &metainfo, "announce" );
tr_bencDictRemove( &metainfo, "announce-list" );
/* add the new fields */
tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
for( i = 0; i < trackerCount; ++i ) {
if( prevTier != trackers[i].tier ) {
prevTier = trackers[i].tier;
tier = tr_bencListAddList( announceList, 0 );
}
tr_bencListAddStr( tier, trackers[i].announce );
}
/* try to parse it back again, to make sure it's good */
memset( &tmpInfo, 0, sizeof( tr_info ) );
if( tr_metainfoParse( tor->session, &tmpInfo, &metainfo ) )
{
/* it's good, so keep these new trackers and free the old ones */
tr_info swap;
swap.trackers = tor->info.trackers;
swap.trackerCount = tor->info.trackerCount;
tor->info.trackers = tmpInfo.trackers;
tor->info.trackerCount = tmpInfo.trackerCount;
tmpInfo.trackers = swap.trackers;
tmpInfo.trackerCount = swap.trackerCount;
tr_metainfoFree( &tmpInfo );
tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
}
/* cleanup */
tr_bencFree( &metainfo );
}
}
/**
***
**/
void
tr_torrentSetAddedDate( tr_torrent * tor,
time_t t )
{
assert( tr_isTorrent( tor ) );
tor->addedDate = t;
tor->anyDate = MAX( tor->anyDate, tor->addedDate );
}
void
tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
{
assert( tr_isTorrent( tor ) );
tor->activityDate = t;
tor->anyDate = MAX( tor->anyDate, tor->activityDate );
}
void
tr_torrentSetDoneDate( tr_torrent * tor,
time_t t )
{
assert( tr_isTorrent( tor ) );
tor->doneDate = t;
tor->anyDate = MAX( tor->anyDate, tor->doneDate );
}
/**
***
**/
uint64_t
tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
{
const tr_file * it;
const tr_file * end;
struct stat sb;
uint64_t bytesLeft = 0;
assert( tr_isTorrent( tor ) );
for( it=tor->info.files, end=it+tor->info.fileCount; it!=end; ++it )
{
if( !it->dnd )
{
char * path = tr_buildPath( tor->downloadDir, it->name, NULL );
bytesLeft += it->length;
if( !stat( path, &sb )
&& S_ISREG( sb.st_mode )
&& ( (uint64_t)sb.st_size <= it->length ) )
bytesLeft -= sb.st_size;
tr_free( path );
}
}
return bytesLeft;
}
/****
***** Removing the torrent's local data
****/
static int
vstrcmp( const void * a, const void * b )
{
return strcmp( a, b );
}
static int
compareLongestFirst( const void * a, const void * b )
{
const size_t alen = strlen( a );
const size_t blen = strlen( b );
if( alen != blen )
return alen > blen ? -1 : 1;
return vstrcmp( a, b );
}
static void
addDirtyFile( const char * root,
const char * filename,
tr_ptrArray * dirtyFolders )
{
char * dir = tr_dirname( filename );
/* add the parent folders to dirtyFolders until we reach the root or a known-dirty */
while ( ( dir != NULL )
&& ( strlen( root ) <= strlen( dir ) )
&& ( tr_ptrArrayFindSorted( dirtyFolders, dir, vstrcmp ) == NULL ) )
{
char * tmp;
tr_ptrArrayInsertSorted( dirtyFolders, tr_strdup( dir ), vstrcmp );
tmp = tr_dirname( dir );
tr_free( dir );
dir = tmp;
}
tr_free( dir );
}
static void
walkLocalData( const tr_torrent * tor,
const char * root,
const char * dir,
const char * base,
tr_ptrArray * torrentFiles,
tr_ptrArray * folders,
tr_ptrArray * dirtyFolders )
{
int i;
struct stat sb;
char * buf;
assert( tr_isTorrent( tor ) );
buf = tr_buildPath( dir, base, NULL );
i = stat( buf, &sb );
if( !i )
{
DIR * odir = NULL;
if( S_ISDIR( sb.st_mode ) && ( ( odir = opendir ( buf ) ) ) )
{
struct dirent *d;
tr_ptrArrayInsertSorted( folders, tr_strdup( buf ), vstrcmp );
for( d = readdir( odir ); d != NULL; d = readdir( odir ) )
if( d->d_name && d->d_name[0] != '.' ) /* skip dotfiles */
walkLocalData( tor, root, buf, d->d_name, torrentFiles, folders, dirtyFolders );
closedir( odir );
}
else if( S_ISREG( sb.st_mode ) && ( sb.st_size > 0 ) )
{
const char * sub = buf + strlen( tor->downloadDir ) + strlen( TR_PATH_DELIMITER_STR );
const tr_bool isTorrentFile = tr_ptrArrayFindSorted( torrentFiles, sub, vstrcmp ) != NULL;
if( !isTorrentFile )
addDirtyFile( root, buf, dirtyFolders );
}
}
tr_free( buf );
}
static void
deleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
{
int i, n;
char ** s;
tr_file_index_t f;
tr_ptrArray torrentFiles = TR_PTR_ARRAY_INIT;
tr_ptrArray folders = TR_PTR_ARRAY_INIT;
tr_ptrArray dirtyFolders = TR_PTR_ARRAY_INIT; /* dirty == contains non-torrent files */
const char * firstFile = tor->info.files[0].name;
const char * cpch = strchr( firstFile, TR_PATH_DELIMITER );
char * tmp = cpch ? tr_strndup( firstFile, cpch - firstFile ) : NULL;
char * root = tr_buildPath( tor->downloadDir, tmp, NULL );
assert( tr_isTorrent( tor ) );
for( f=0; f<tor->info.fileCount; ++f )
tr_ptrArrayInsertSorted( &torrentFiles, tor->info.files[f].name, vstrcmp );
/* build the set of folders and dirtyFolders */
walkLocalData( tor, root, root, NULL, &torrentFiles, &folders, &dirtyFolders );
/* try to remove entire folders first, so that the recycle bin will be tidy */
s = (char**) tr_ptrArrayPeek( &folders, &n );
for( i=0; i<n; ++i )
if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
fileFunc( s[i] );
/* now blow away any remaining torrent files, such as torrent files in dirty folders */
for( f=0; f<tor->info.fileCount; ++f ) {
char * path = tr_buildPath( tor->downloadDir, tor->info.files[f].name, NULL );
fileFunc( path );
tr_free( path );
}
/* Now clean out the directories left empty from the previous step.
* Work from deepest to shallowest s.t. lower folders
* won't prevent the upper folders from being deleted */
{
tr_ptrArray cleanFolders = TR_PTR_ARRAY_INIT;
s = (char**) tr_ptrArrayPeek( &folders, &n );
for( i=0; i<n; ++i )
if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
tr_ptrArrayInsertSorted( &cleanFolders, s[i], compareLongestFirst );
s = (char**) tr_ptrArrayPeek( &cleanFolders, &n );
for( i=0; i<n; ++i )
fileFunc( s[i] );
tr_ptrArrayDestruct( &cleanFolders, NULL );
}
/* cleanup */
tr_ptrArrayDestruct( &dirtyFolders, tr_free );
tr_ptrArrayDestruct( &folders, tr_free );
tr_ptrArrayDestruct( &torrentFiles, NULL );
tr_free( root );
tr_free( tmp );
}
void
tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
{
assert( tr_isTorrent( tor ) );
if( fileFunc == NULL )
fileFunc = remove;
/* close all the files because we're about to delete them */
tr_fdTorrentClose( tor->uniqueId );
if( tor->info.fileCount > 1 )
deleteLocalData( tor, fileFunc );
else {
/* torrent only has one file */
char * path = tr_buildPath( tor->downloadDir, tor->info.files[0].name, NULL );
fileFunc( path );
tr_free( path );
}
}
/***
****
***/
struct LocationData
{
tr_bool move_from_old_location;
int * setme_state;
double * setme_progress;
char * location;
tr_torrent * tor;
};
static void
setLocation( void * vdata )
{
int err = 0;
struct LocationData * data = vdata;
tr_torrent * tor = data->tor;
const tr_bool do_move = data->move_from_old_location;
const char * location = data->location;
double bytesHandled = 0;
assert( tr_isTorrent( tor ) );
if( strcmp( location, tor->downloadDir ) )
{
tr_file_index_t i;
/* bad idea to move files while they're being verified... */
tr_verifyRemove( tor );
/* if the torrent is running, stop it and set a flag to
* restart after we're done */
if( tor->isRunning )
{
tr_torrentStop( tor );
tor->startAfterVerify = TRUE;
}
/* try to move the files.
* FIXME: there are still all kinds of nasty cases, like what
* if the target directory runs out of space halfway through... */
for( i=0; !err && i<tor->info.fileCount; ++i )
{
struct stat sb;
const tr_file * f = &tor->info.files[i];
char * oldpath = tr_buildPath( tor->downloadDir, f->name, NULL );
char * newpath = tr_buildPath( location, f->name, NULL );
if( do_move )
{
errno = 0;
tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
if( tr_moveFile( oldpath, newpath ) ) {
err = 1;
tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
oldpath, newpath, tr_strerror( errno ) );
}
}
else if( !stat( newpath, &sb ) )
{
tr_torinf( tor, "found \"%s\"", newpath );
}
if( data->setme_progress )
{
bytesHandled += f->length;
*data->setme_progress = bytesHandled / tor->info.totalSize;
}
tr_free( newpath );
tr_free( oldpath );
}
if( !err )
{
/* blow away the leftover subdirectories in the old location */
tr_torrentDeleteLocalData( tor, remove );
/* set the new location and reverify */
tr_torrentSetDownloadDir( tor, location );
tr_torrentVerify( tor );
}
}
if( data->setme_state )
*data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
/* cleanup */
tr_free( data->location );
tr_free( data );
}
void
tr_torrentSetLocation( tr_torrent * tor,
const char * location,
tr_bool move_from_old_location,
double * setme_progress,
int * setme_state )
{
struct LocationData * data;
assert( tr_isTorrent( tor ) );
if( setme_state )
*setme_state = TR_LOC_MOVING;
if( setme_progress )
*setme_progress = 0;
/* run this in the libtransmission thread */
data = tr_new( struct LocationData, 1 );
data->tor = tor;
data->location = tr_strdup( location );
data->move_from_old_location = move_from_old_location;
data->setme_state = setme_state;
data->setme_progress = setme_progress;
tr_runInEventThread( tor->session, setLocation, data );
}
/***
****
***/
void
tr_torrentCheckSeedRatio( tr_torrent * tor )
{
double seedRatio;
assert( tr_isTorrent( tor ) );
/* if we're seeding and we've reached our seed ratio limit, stop the torrent */
if( tor->isRunning && tr_torrentIsSeed( tor ) && tr_torrentGetSeedRatio( tor, &seedRatio ) )
{
const uint64_t up = tor->uploadedCur + tor->uploadedPrev;
uint64_t down = tor->downloadedCur + tor->downloadedPrev;
double ratio;
/* maybe we're the initial seeder and never downloaded anything... */
if( down == 0 )
down = tr_cpHaveValid( &tor->completion );
ratio = tr_getRatio( up, down );
if( ratio >= seedRatio || ratio == TR_RATIO_INF )
{
tr_torrentStop( tor );
/* set to no ratio limit to allow easy restarting */
tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
/* maybe notify the client */
if( tor->ratio_limit_hit_func != NULL )
tor->ratio_limit_hit_func( tor, tor->ratio_limit_hit_func_user_data );
}
}
}
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