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transmission/libtransmission/torrent.c

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/******************************************************************************
* $Id$
*
* Copyright (c) 2005-2008 Transmission authors and contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#include <sys/types.h> /* stat */
#include <sys/stat.h> /* stat */
#include <unistd.h> /* stat */
#include <assert.h>
#include <limits.h> /* INT_MAX */
#include <string.h> /* memcmp */
#include <stdlib.h> /* qsort */
#include "transmission.h"
#include "bencode.h"
#include "completion.h"
#include "crypto.h" /* for tr_sha1 */
#include "resume.h"
#include "fdlimit.h" /* tr_fdFileClose */
#include "metainfo.h"
#include "peer-mgr.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_handle * handle,
int id )
{
tr_torrent * tor = NULL;
while( ( tor = tr_torrentNext( handle, tor ) ) )
if( tor->uniqueId == id )
return tor;
return NULL;
}
tr_torrent*
tr_torrentFindFromHashString( tr_handle * handle,
const char * str )
{
tr_torrent * tor = NULL;
while( ( tor = tr_torrentNext( handle, tor ) ) )
if( !strcmp( str, tor->info.hashString ) )
return tor;
return NULL;
}
int
tr_torrentExists( const tr_handle * handle,
const uint8_t * torrentHash )
{
return tr_torrentFindFromHash( (tr_handle*)handle,
torrentHash ) != NULL;
}
tr_torrent*
tr_torrentFindFromHash( tr_handle * handle,
const uint8_t * torrentHash )
{
tr_torrent * tor = NULL;
while( ( tor = tr_torrentNext( handle, tor ) ) )
if( *tor->info.hash == *torrentHash )
if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
return tor;
return NULL;
}
tr_torrent*
tr_torrentFindFromObfuscatedHash( tr_handle * handle,
const uint8_t * obfuscatedTorrentHash )
{
tr_torrent * tor = NULL;
while( ( tor = tr_torrentNext( handle, tor ) ) )
if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
SHA_DIGEST_LENGTH ) )
return tor;
return NULL;
}
/***
**** LOCKS
***/
void
tr_torrentLock( const tr_torrent * tor )
{
tr_globalLock( tor->session );
}
void
tr_torrentUnlock( const tr_torrent * tor )
{
tr_globalUnlock( tor->session );
}
/***
**** PER-TORRENT UL / DL SPEEDS
***/
void
tr_torrentSetSpeedMode( tr_torrent * tor,
tr_direction direction,
tr_speedlimit mode )
{
tr_speedlimit * limit = direction == TR_UP ? &tor->uploadLimitMode
: &tor->downloadLimitMode;
*limit = mode;
}
tr_speedlimit
tr_torrentGetSpeedMode( const tr_torrent * tor,
tr_direction direction )
{
return direction == TR_UP ? tor->uploadLimitMode
: tor->downloadLimitMode;
}
void
tr_torrentSetSpeedLimit( tr_torrent * tor,
tr_direction direction,
int single_KiB_sec )
{
switch( direction )
{
case TR_UP:
tor->uploadLimit = single_KiB_sec; break;
case TR_DOWN:
tor->downloadLimit = single_KiB_sec; break;
default:
assert( 0 );
}
}
int
tr_torrentGetSpeedLimit( const tr_torrent * tor,
tr_direction direction )
{
switch( direction )
{
case TR_UP:
return tor->uploadLimit;
case TR_DOWN:
return tor->downloadLimit;
default:
assert( 0 );
}
}
int
tr_torrentIsPieceTransferAllowed( const tr_torrent * tor,
tr_direction direction )
{
int isEnabled = FALSE;
switch( tr_torrentGetSpeedMode( tor, direction ) )
{
case TR_SPEEDLIMIT_GLOBAL:
isEnabled = !tr_sessionIsSpeedLimitEnabled( tor->session, direction )
|| tr_sessionGetSpeedLimit( tor->session, direction ) > 0;
break;
case TR_SPEEDLIMIT_SINGLE:
isEnabled = tr_torrentGetSpeedLimit( tor, direction ) > 0;
break;
case TR_SPEEDLIMIT_UNLIMITED:
isEnabled = TRUE;
break;
default:
assert( 0 && "unhandled speed mode" );
break;
}
return isEnabled;
}
/***
****
***/
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_peerMgrCompactToPex( event->compact,
event->compactLen,
NULL, 0, &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->session->peerMgr, tor->info.hash,
TR_PEER_FROM_TRACKER, pex + i );
}
tr_free( pex );
break;
}
case TR_TRACKER_WARNING:
tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
tor->error = -1;
tr_strlcpy( tor->errorString, event->text,
sizeof( tor->errorString ) );
break;
case TR_TRACKER_ERROR:
tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
tor->error = -2;
tr_strlcpy( tor->errorString, event->text,
sizeof( tor->errorString ) );
break;
case TR_TRACKER_ERROR_CLEAR:
tor->error = 0;
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 ff;
tr_piece_index_t pp;
uint64_t offset = 0;
tr_info * inf = &tor->info;
assert( inf );
for( ff = 0; ff < inf->fileCount; ++ff )
{
inf->files[ff].offset = offset;
offset += inf->files[ff].length;
initFilePieces( inf, ff );
}
for( pp = 0; pp < inf->pieceCount; ++pp )
inf->pieces[pp].priority = calculatePiecePriority( tor, pp, -1 );
}
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 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,
int reloadProgress );
/**
* 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_handle * h,
tr_torrent * tor,
const tr_ctor * ctor )
{
int doStart;
uint64_t loaded;
uint64_t t;
tr_info * info = &tor->info;
static int nextUniqueId = 1;
tr_globalLock( h );
tor->session = h;
tor->uniqueId = nextUniqueId++;
randomizeTiers( info );
tor->pieceSpeed[TR_CLIENT_TO_PEER] = tr_rcInit( );
tor->pieceSpeed[TR_PEER_TO_CLIENT] = tr_rcInit( );
tor->blockSize = getBlockSize( info->pieceSize );
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 );
tor->completion = tr_cpInit( tor );
tr_torrentInitFilePieces( tor );
tor->uploadLimit = 0;
tor->downloadLimit = 0;
tor->swarmSpeed = tr_rcInit( );
tr_sha1( tor->obfuscatedHash, "req2", 4,
info->hash, SHA_DIGEST_LENGTH,
NULL );
tr_peerMgrAddTorrent( h->peerMgr, tor );
if( !h->isPortSet )
tr_sessionSetPeerPort( h, TR_DEFAULT_PORT );
assert( !tor->downloadedCur );
assert( !tor->uploadedCur );
tor->error = 0;
tor->checkedPieces = tr_bitfieldNew( tor->info.pieceCount );
tr_torrentUncheck( tor );
tor->addedDate = 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_torrentSetSpeedLimit( tor, TR_UP,
tr_sessionGetSpeedLimit( tor->session, TR_UP ) );
tr_torrentSetSpeedLimit( tor, TR_DOWN,
tr_sessionGetSpeedLimit( tor->session,
TR_DOWN ) );
}
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( h, it ) ) )
last = it;
if( !last )
h->torrentList = tor;
else
last->next = tor;
++h->torrentCount;
}
tr_globalUnlock( h );
/* 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_bencSaveFile( filename, val );
tr_sessionSetTorrentFile( tor->session, tor->info.hashString,
filename );
}
}
tr_metainfoMigrate( h, &tor->info );
if( doStart )
torrentStart( tor, FALSE );
}
int
tr_torrentParse( const tr_handle * handle,
const tr_ctor * ctor,
tr_info * setmeInfo )
{
int err = 0;
int doFree;
tr_info tmp;
const tr_benc * metainfo;
if( setmeInfo == NULL )
setmeInfo = &tmp;
memset( setmeInfo, 0, sizeof( tr_info ) );
if( !err && tr_ctorGetMetainfo( ctor, &metainfo ) )
return TR_EINVALID;
err = tr_metainfoParse( handle, setmeInfo, metainfo );
doFree = !err && ( setmeInfo == &tmp );
if( !err && !getBlockSize( setmeInfo->pieceSize ) )
err = TR_EINVALID;
if( !err && tr_torrentExists( handle, setmeInfo->hash ) )
err = TR_EDUPLICATE;
if( doFree )
tr_metainfoFree( setmeInfo );
return err;
}
tr_torrent *
tr_torrentNew( tr_handle * handle,
const tr_ctor * ctor,
int * setmeError )
{
int err;
tr_info tmpInfo;
tr_torrent * tor = NULL;
err = tr_torrentParse( handle, ctor, &tmpInfo );
if( !err )
{
tor = tr_new0( tr_torrent, 1 );
tor->info = tmpInfo;
torrentRealInit( handle, tor, ctor );
}
else if( setmeError )
{
*setmeError = err;
}
return tor;
}
/**
***
**/
void
tr_torrentSetDownloadDir( tr_torrent * tor,
const char * path )
{
if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
{
tr_free( tor->downloadDir );
tor->downloadDir = tr_strdup( path );
tr_torrentSaveResume( tor );
}
}
const char*
tr_torrentGetDownloadDir( const tr_torrent * tor )
{
return tor->downloadDir;
}
void
tr_torrentChangeMyPort( tr_torrent * tor )
{
if( tor->tracker )
tr_trackerChangeMyPort( tor->tracker );
}
int
tr_torrentIsPrivate( const tr_torrent * tor )
{
return tor
&& tor->info.isPrivate;
}
int
tr_torrentAllowsPex( const tr_torrent * tor )
{
return tor
&& tor->session->isPexEnabled
&& !tr_torrentIsPrivate( tor );
}
static void
tr_torrentManualUpdateImpl( void * vtor )
{
tr_torrent * tor = vtor;
if( tor->isRunning )
tr_trackerReannounce( tor->tracker );
}
void
tr_torrentManualUpdate( tr_torrent * tor )
{
tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
}
int
tr_torrentCanManualUpdate( const tr_torrent * tor )
{
return ( tor )
&& ( tor->isRunning )
&& ( tr_trackerCanManualAnnounce( tor->tracker ) );
}
const tr_info *
tr_torrentInfo( const tr_torrent * tor )
{
return tor ? &tor->info : NULL;
}
static double
tr_torrentGetRate( const tr_torrent * tor,
tr_direction direction )
{
assert( tor != NULL );
assert( direction == TR_UP || direction == TR_DOWN );
return tr_rcRate( tor->pieceSpeed[direction] );
}
const tr_stat *
tr_torrentStatCached( tr_torrent * tor )
{
const time_t now = time( NULL );
return tor && ( now == tor->lastStatTime ) ? &tor->stats
: tr_torrentStat( tor );
}
tr_torrent_activity
tr_torrentGetActivity( tr_torrent * 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_CP_INCOMPLETE )
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;
if( !tor )
return NULL;
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 );
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 );
tr_peerMgrTorrentStats( tor->session->peerMgr,
tor->info.hash,
&s->peersKnown,
&s->peersConnected,
&usableSeeds,
&s->webseedsSendingToUs,
&s->peersSendingToUs,
&s->peersGettingFromUs,
s->peersFrom );
s->rateDownload = tr_torrentGetRate( tor, TR_PEER_TO_CLIENT );
s->rateUpload = tr_torrentGetRate( tor, TR_CLIENT_TO_PEER );
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->swarmSpeed = tr_rcRate( tor->swarmSpeed );
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->session->peerMgr,
tor->info.
hash );
s->desiredAvailable = 0;
for( i = 0; i < tor->info.pieceCount; ++i )
if( !tor->info.pieces[i].dnd && tr_bitfieldHas( peerPieces, i ) )
s->desiredAvailable += tr_cpMissingBlocksInPiece(
tor->completion, i );
s->desiredAvailable *= tor->blockSize;
tr_bitfieldFree( peerPieces );
}
if( s->leftUntilDone > s->desiredAvailable )
s->eta = TR_ETA_NOT_AVAIL;
else if( s->rateDownload < 0.1 )
s->eta = TR_ETA_UNKNOWN;
else
s->eta = s->leftUntilDone / s->rateDownload / 1024.0;
s->ratio = tr_getRatio(
s->uploadedEver,
s->downloadedEver ? s->downloadedEver : s->
haveValid );
tr_torrentUnlock( tor );
return s;
}
/***
****
***/
static uint64_t
fileBytesCompleted( const tr_torrent * tor,
tr_file_index_t fileIndex )
{
const tr_file * file = &tor->info.files[fileIndex];
const tr_block_index_t firstBlock = file->offset /
tor->blockSize;
const uint64_t firstBlockOffset = file->offset %
tor->blockSize;
const uint64_t lastOffset =
file->length ? ( file->length - 1 ) : 0;
const tr_block_index_t lastBlock =
( file->offset + lastOffset ) / tor->blockSize;
const uint64_t lastBlockOffset =
( file->offset + lastOffset ) % tor->blockSize;
uint64_t haveBytes = 0;
assert( tor );
assert( fileIndex < tor->info.fileCount );
assert( file->offset + file->length <= tor->info.totalSize );
assert( ( firstBlock < tor->blockCount )
|| ( !file->length && file->offset == tor->info.totalSize ) );
assert( ( lastBlock < tor->blockCount )
|| ( !file->length && file->offset == tor->info.totalSize ) );
assert( firstBlock <= lastBlock );
assert( tr_torBlockPiece( tor, firstBlock ) == file->firstPiece );
assert( tr_torBlockPiece( tor, lastBlock ) == file->lastPiece );
if( firstBlock == lastBlock )
{
if( tr_cpBlockIsComplete( tor->completion, firstBlock ) )
haveBytes += lastBlockOffset + 1 - firstBlockOffset;
}
else
{
tr_block_index_t i;
if( tr_cpBlockIsComplete( tor->completion, firstBlock ) )
haveBytes += tor->blockSize - firstBlockOffset;
for( i = firstBlock + 1; i < lastBlock; ++i )
if( tr_cpBlockIsComplete( tor->completion, i ) )
haveBytes += tor->blockSize;
if( tr_cpBlockIsComplete( tor->completion, lastBlock ) )
haveBytes += lastBlockOffset + 1;
}
return haveBytes;
}
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;
for( i = 0; i < n; ++i, ++walk )
{
const uint64_t b = 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 tor ? tr_peerMgrWebSpeeds( tor->session->peerMgr, tor->info.hash )
: NULL;
}
tr_peer_stat *
tr_torrentPeers( const tr_torrent * tor,
int * peerCount )
{
tr_peer_stat * ret = NULL;
if( tor )
ret = tr_peerMgrPeerStats( tor->session->peerMgr,
tor->info.hash, 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->session->peerMgr,
tor->info.hash,
tab, size );
}
void
tr_torrentAmountFinished( const tr_torrent * tor,
float * tab,
int size )
{
tr_torrentLock( tor );
tr_cpGetAmountDone( tor->completion, tab, size );
tr_torrentUnlock( tor );
}
void
tr_torrentResetTransferStats( tr_torrent * 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_torrentUnlock( tor );
}
void
tr_torrentSetHasPiece( tr_torrent * tor,
tr_piece_index_t pieceIndex,
int has )
{
tr_torrentLock( tor );
assert( tor );
assert( pieceIndex < tor->info.pieceCount );
if( has )
tr_cpPieceAdd( tor->completion, pieceIndex );
else
tr_cpPieceRem( tor->completion, pieceIndex );
tr_torrentUnlock( tor );
}
/***
****
***/
static void
freeTorrent( tr_torrent * tor )
{
tr_torrent * t;
tr_handle * h = tor->session;
tr_info * inf = &tor->info;
assert( tor );
assert( !tor->isRunning );
tr_globalLock( h );
tr_peerMgrRemoveTorrent( h->peerMgr, tor->info.hash );
tr_cpClose( tor->completion );
tr_rcClose( tor->swarmSpeed );
tr_trackerUnsubscribe( tor->tracker, tor->trackerSubscription );
tr_trackerFree( tor->tracker );
tor->tracker = NULL;
tr_bitfieldFree( tor->checkedPieces );
tr_free( tor->downloadDir );
if( tor == h->torrentList )
h->torrentList = tor->next;
else for( t = h->torrentList; t != NULL; t = t->next )
{
if( t->next == tor )
{
t->next = tor->next;
break;
}
}
assert( h->torrentCount >= 1 );
h->torrentCount--;
tr_rcClose( tor->pieceSpeed[TR_PEER_TO_CLIENT] );
tr_rcClose( tor->pieceSpeed[TR_CLIENT_TO_PEER] );
tr_metainfoFree( inf );
tr_free( tor );
tr_globalUnlock( h );
}
/**
*** Start/Stop Callback
**/
static void
checkAndStartImpl( void * vtor )
{
tr_torrent * tor = vtor;
tr_globalLock( tor->session );
tor->isRunning = 1;
*tor->errorString = '\0';
tr_torrentResetTransferStats( tor );
tor->completeness = tr_cpGetStatus( tor->completion );
tr_torrentSaveResume( tor );
tor->startDate = time( NULL );
tr_trackerStart( tor->tracker );
tr_peerMgrStartTorrent( tor->session->peerMgr, tor->info.hash );
tr_globalUnlock( tor->session );
}
static void
checkAndStartCB( tr_torrent * tor )
{
tr_runInEventThread( tor->session, checkAndStartImpl, tor );
}
static void
torrentStart( tr_torrent * tor,
int reloadProgress )
{
tr_globalLock( tor->session );
if( !tor->isRunning )
{
const int isVerifying = tr_verifyInProgress( tor );
if( !isVerifying && reloadProgress )
tr_torrentLoadResume( tor, TR_FR_PROGRESS, NULL );
tor->isRunning = 1;
if( !isVerifying )
tr_verifyAdd( tor, checkAndStartCB );
}
tr_globalUnlock( tor->session );
}
void
tr_torrentStart( tr_torrent * tor )
{
if( tor )
torrentStart( tor, TRUE );
}
static void
torrentRecheckDoneImpl( void * vtor )
{
tr_torrentRecheckCompleteness( vtor );
}
static void
torrentRecheckDoneCB( tr_torrent * tor )
{
tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
}
void
tr_torrentVerify( tr_torrent * tor )
{
tr_verifyRemove( tor );
tr_globalLock( tor->session );
tr_torrentUncheck( tor );
tr_verifyAdd( tor, torrentRecheckDoneCB );
tr_globalUnlock( tor->session );
}
static void
stopTorrent( void * vtor )
{
tr_file_index_t i;
tr_torrent * tor = vtor;
tr_verifyRemove( tor );
tr_peerMgrStopTorrent( tor->session->peerMgr, tor->info.hash );
tr_trackerStop( tor->tracker );
for( i = 0; i < tor->info.fileCount; ++i )
{
const tr_file * file = &tor->info.files[i];
char * path = tr_buildPath( tor->downloadDir, file->name, NULL );
tr_fdFileClose( path );
tr_free( path );
}
}
void
tr_torrentStop( tr_torrent * tor )
{
if( tor )
{
tr_globalLock( tor->session );
tor->isRunning = 0;
if( !tor->isDeleting )
tr_torrentSaveResume( tor );
tr_runInEventThread( tor->session, stopTorrent, tor );
tr_globalUnlock( tor->session );
}
}
static void
closeTorrent( void * vtor )
{
tr_torrent * tor = vtor;
tr_torrentSaveResume( tor );
tor->isRunning = 0;
stopTorrent( tor );
if( tor->isDeleting )
{
tr_metainfoRemoveSaved( tor->session, &tor->info );
tr_torrentRemoveResume( tor );
}
freeTorrent( tor );
}
void
tr_torrentFree( tr_torrent * tor )
{
if( tor )
{
tr_handle * handle = tor->session;
tr_globalLock( handle );
tr_torrentClearCompletenessCallback( tor );
tr_runInEventThread( handle, closeTorrent, tor );
tr_globalUnlock( handle );
}
}
void
tr_torrentRemove( tr_torrent * 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_CP_DONE:
return _( "Done" );
case TR_CP_COMPLETE:
return _( "Complete" );
default:
return _( "Incomplete" );
}
}
static void
fireCompletenessChange( tr_torrent * tor,
tr_completeness status )
{
assert( tor );
assert( ( status == TR_CP_INCOMPLETE )
|| ( status == TR_CP_DONE )
|| ( status == TR_CP_COMPLETE ) );
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( tor );
tor->completeness_func = func;
tor->completeness_func_user_data = user_data;
}
void
tr_torrentClearCompletenessCallback( tr_torrent * torrent )
{
tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
}
void
tr_torrentRecheckCompleteness( tr_torrent * tor )
{
tr_completeness completeness;
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;
fireCompletenessChange( tor, completeness );
if( recentChange && ( completeness == TR_CP_COMPLETE ) )
{
tr_trackerCompleted( tor->tracker );
tor->doneDate = time( NULL );
}
tr_torrentSaveResume( tor );
}
tr_torrentUnlock( tor );
}
int
tr_torrentIsSeed( const tr_torrent * tor )
{
return tor->completeness == TR_CP_COMPLETE || tor->completeness == TR_CP_DONE;
}
/**
*** 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( tor );
assert( fileIndex < tor->info.fileCount );
assert(
priority == TR_PRI_LOW || priority == TR_PRI_NORMAL || priority ==
TR_PRI_HIGH );
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;
tr_torrentLock( tor );
for( i = 0; i < fileCount; ++i )
tr_torrentInitFilePriority( tor, files[i], priority );
tr_torrentSaveResume( tor );
tr_torrentUnlock( tor );
}
tr_priority_t
tr_torrentGetFilePriority( const tr_torrent * tor,
tr_file_index_t file )
{
tr_priority_t ret;
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;
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;
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;
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,
int doDownload )
{
tr_file_index_t i;
tr_torrentLock( tor );
for( i = 0; i < fileCount; ++i )
setFileDND( tor, files[i], doDownload );
tr_cpInvalidateDND ( tor->completion );
tr_torrentUnlock( tor );
}
void
tr_torrentSetFileDLs( tr_torrent * tor,
tr_file_index_t * files,
tr_file_index_t fileCount,
int doDownload )
{
tr_torrentLock( tor );
tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
tr_torrentSaveResume( tor );
tr_torrentUnlock( tor );
}
/***
****
***/
void
tr_torrentSetPeerLimit( tr_torrent * tor,
uint16_t maxConnectedPeers )
{
tor->maxConnectedPeers = maxConnectedPeers;
}
uint16_t
tr_torrentGetPeerLimit( const tr_torrent * tor )
{
return tor->maxConnectedPeers;
}
/***
****
***/
tr_block_index_t
_tr_block( const tr_torrent * tor,
tr_piece_index_t index,
uint32_t offset )
{
const tr_info * inf = &tor->info;
tr_block_index_t ret;
ret = index;
ret *= ( inf->pieceSize / tor->blockSize );
ret += offset / tor->blockSize;
return ret;
}
int
tr_torrentReqIsValid( const tr_torrent * tor,
tr_piece_index_t index,
uint32_t offset,
uint32_t length )
{
int err = 0;
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 ) fprintf( stderr, "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;
ret = tor->info.pieceSize;
ret *= index;
ret += offset;
ret += length;
return ret;
}
/***
****
***/
int
tr_torrentIsPieceChecked( const tr_torrent * tor,
tr_piece_index_t piece )
{
return tr_bitfieldHas( tor->checkedPieces, piece );
}
void
tr_torrentSetPieceChecked( tr_torrent * tor,
tr_piece_index_t piece,
int isChecked )
{
if( isChecked )
tr_bitfieldAdd( tor->checkedPieces, piece );
else
tr_bitfieldRem( tor->checkedPieces, piece );
}
void
tr_torrentSetFileChecked( tr_torrent * tor,
tr_file_index_t fileIndex,
int 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;
if( isChecked )
tr_bitfieldAddRange ( tor->checkedPieces, begin, end );
else
tr_bitfieldRemRange ( tor->checkedPieces, begin, end );
}
int
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;
int isChecked = TRUE;
for( i = begin; isChecked && i < end; ++i )
if( !tr_torrentIsPieceChecked( tor, i ) )
isChecked = FALSE;
return isChecked;
}
void
tr_torrentUncheck( tr_torrent * tor )
{
tr_bitfieldRemRange ( tor->checkedPieces, 0, tor->info.pieceCount );
}
int
tr_torrentCountUncheckedPieces( const tr_torrent * 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 );
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;
/* save to the .torrent file */
if( !tr_bencLoadFile( tor->info.torrent, &metainfo ) )
{
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 ) )
{
/* if it's good, save it and use it */
tr_metainfoFree( &tor->info );
tor->info = tmpInfo;
tr_torrentInitFilePieces( tor );
tr_bencSaveFile( tor->info.torrent, &metainfo );
}
/* cleanup */
tr_bencFree( &metainfo );
}
}
/**
***
**/
/** @deprecated this method will be removed in 1.40 */
void
tr_torrentSetAddedDate( tr_torrent * tor,
time_t t )
{
tor->addedDate = t;
}
/** @deprecated this method will be removed in 1.40 */
void
tr_torrentSetActivityDate( tr_torrent * tor,
time_t t )
{
tor->activityDate = t;
}
/** @deprecated this method will be removed in 1.40 */
void
tr_torrentSetDoneDate( tr_torrent * tor,
time_t t )
{
tor->doneDate = t;
}
/**
***
**/
uint64_t
tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
{
const tr_file * it;
const tr_file * end;
struct stat sb;
uint64_t bytesLeft = 0;
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;
}
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