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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 <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "transmission.h"
#include "bencode.h"
#include "completion.h"
#include "crypto.h" /* for tr_sha1 */
#include "fastresume.h"
#include "fdlimit.h" /* tr_fdFileClose */
#include "handshake.h"
#include "inout.h"
#include "metainfo.h"
#include "net.h" /* tr_netNtop */
#include "peer-mgr.h"
#include "platform.h"
#include "ratecontrol.h"
#include "shared.h"
#include "torrent.h"
#include "tracker.h"
#include "trcompat.h" /* for strlcpy */
#include "trevent.h"
#include "utils.h"
/***
****
***/
int
tr_torrentExists( tr_handle * handle,
const uint8_t * torrentHash )
{
return tr_torrentFindFromHash( handle, torrentHash ) != NULL;
}
tr_torrent*
tr_torrentFindFromHash( tr_handle * handle,
const uint8_t * torrentHash )
{
tr_torrent * tor;
for( tor = handle->torrentList; tor; tor = tor->next )
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;
for( tor = handle->torrentList; tor; tor = tor->next )
if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash, SHA_DIGEST_LENGTH ) )
return tor;
return NULL;
}
/***
**** LOCKS
***/
void
tr_torrentLock( const tr_torrent * tor )
{
tr_globalLock( tor->handle );
}
void
tr_torrentUnlock( const tr_torrent * tor )
{
tr_globalUnlock( tor->handle );
}
/***
**** PER-TORRENT UL / DL SPEEDS
***/
void
tr_torrentSetSpeedMode( tr_torrent * tor,
int up_or_down,
tr_speedlimit mode )
{
tr_speedlimit * limit = up_or_down==TR_UP
? &tor->uploadLimitMode
: &tor->downloadLimitMode;
*limit = mode;
}
tr_speedlimit
tr_torrentGetSpeedMode( const tr_torrent * tor,
int up_or_down)
{
return up_or_down==TR_UP ? tor->uploadLimitMode
: tor->downloadLimitMode;
}
void
tr_torrentSetSpeedLimit( tr_torrent * tor,
int up_or_down,
int single_KiB_sec )
{
tr_ratecontrol * rc = up_or_down==TR_UP ? tor->upload : tor->download;
tr_rcSetLimit( rc, single_KiB_sec );
}
int
tr_torrentGetSpeedLimit( const tr_torrent * tor,
int up_or_down )
{
tr_ratecontrol * rc = up_or_down==TR_UP ? tor->upload : tor->download;
return tr_rcGetLimit( rc );
}
/***
****
***/
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:
tr_peerMgrAddPeers( tor->handle->peerMgr,
tor->info.hash,
TR_PEER_FROM_TRACKER,
event->peerCompact,
event->peerCount );
break;
case TR_TRACKER_WARNING:
tr_err( "Tracker: Warning - %s", event->text );
tor->error = TR_ERROR_TC_WARNING;
strlcpy( tor->errorString, event->text, sizeof(tor->errorString) );
break;
case TR_TRACKER_ERROR:
tr_err( "Tracker: Error - %s", event->text );
tor->error = TR_ERROR_TC_ERROR;
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 != NULL );
assert( info->pieceSize != 0 );
return byteOffset / info->pieceSize;
}
static void
initFilePieces ( tr_info * info, int fileIndex )
{
tr_file * file = &info->files[fileIndex];
uint64_t firstByte, lastByte;
assert( info != NULL );
assert( 0<=fileIndex && 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( int piece, const tr_file * file )
{
return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
}
static tr_priority_t
calculatePiecePriority ( const tr_torrent * tor,
int piece,
int fileHint )
{
int 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 )
{
int i;
uint64_t offset = 0;
assert( tor != NULL );
for( i=0; i<tor->info.fileCount; ++i ) {
tor->info.files[i].offset = offset;
offset += tor->info.files[i].length;
initFilePieces( &tor->info, i );
}
for( i=0; i<tor->info.pieceCount; ++i )
tor->info.pieces[i].priority = calculatePiecePriority( tor, i, -1 );
}
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;
tr_globalLock( h );
tor->handle = h;
/**
* Decide on a block size. constraints:
* (1) most clients decline requests over 16 KiB
* (2) pieceSize must be a multiple of block size
*/
tor->blockSize = info->pieceSize;
while( tor->blockSize > (1024*16) )
tor->blockSize /= 2;
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->upload = tr_rcInit();
tor->download = tr_rcInit();
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_setBindPort( h, TR_DEFAULT_PORT );
assert( !tor->downloadedCur );
assert( !tor->uploadedCur );
tor->error = TR_OK;
tor->checkedPieces = tr_bitfieldNew( tor->info.pieceCount );
tr_torrentUncheck( tor );
loaded = tr_fastResumeLoad( tor, ~0, ctor );
doStart = tor->isRunning;
tor->isRunning = 0;
if( !(loaded & TR_FR_SPEEDLIMIT ) ) {
int limit, enabled;
tr_getGlobalSpeedLimit( tor->handle, TR_UP, &enabled, &limit );
tr_torrentSetSpeedLimit( tor, TR_UP, limit );
tr_getGlobalSpeedLimit( tor->handle, TR_DOWN, &enabled, &limit );
tr_torrentSetSpeedLimit( tor, TR_DOWN, limit );
}
tor->cpStatus = tr_cpGetStatus( tor->completion );
tor->tracker = tr_trackerNew( tor );
tor->trackerSubscription = tr_trackerSubscribe( tor->tracker, onTrackerResponse, tor );
tor->next = h->torrentList;
h->torrentList = tor;
h->torrentCount++;
tr_globalUnlock( h );
/* maybe save our own copy of the metainfo */
if( tr_ctorGetSave( ctor ) ) {
const benc_val_t * val;
if( !tr_ctorGetMetainfo( ctor, &val ) ) {
int len;
uint8_t * text = (uint8_t*) tr_bencSave( val, &len );
tr_metainfoSave( tor->info.hashString,
tor->handle->tag,
text, len );
tr_free( text );
}
}
if( doStart )
tr_torrentStart( tor );
}
static int
hashExists( const tr_handle * h,
const uint8_t * hash )
{
const tr_torrent * tor;
for( tor=h->torrentList; tor; tor=tor->next )
if( !memcmp( hash, tor->info.hash, SHA_DIGEST_LENGTH ) )
return TRUE;
return FALSE;
}
int
tr_torrentParse( const tr_handle * handle,
const tr_ctor * ctor,
tr_info * setmeInfo )
{
int err = 0;
int doFree;
tr_info tmp;
const benc_val_t * metainfo;
if( setmeInfo == NULL )
setmeInfo = &tmp;
memset( setmeInfo, 0, sizeof( tr_info ) );
if( !err && tr_ctorGetMetainfo( ctor, &metainfo ) )
return TR_EINVALID;
err = tr_metainfoParse( setmeInfo, metainfo, handle->tag );
doFree = !err && ( setmeInfo == &tmp );
if( !err && hashExists( 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;
}
/***
****
***/
static void
saveFastResumeNow( tr_torrent * tor )
{
tr_fastResumeSave( tor );
}
/**
***
**/
void
tr_torrentSetFolder( tr_torrent * tor, const char * path )
{
tr_free( tor->destination );
tor->destination = tr_strdup( path );
saveFastResumeNow( tor );
}
const char*
tr_torrentGetFolder( const tr_torrent * tor )
{
return tor->destination;
}
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->handle->isPexEnabled
&& !tr_torrentIsPrivate( tor );
}
static void
tr_manualUpdateImpl( void * vtor )
{
tr_torrent * tor = vtor;
if( tor->isRunning )
tr_trackerReannounce( tor->tracker );
}
void
tr_manualUpdate( tr_torrent * tor )
{
tr_runInEventThread( tor->handle, tr_manualUpdateImpl, tor );
}
int
tr_torrentCanManualUpdate( const tr_torrent * tor )
{
return ( tor != NULL )
&& ( tor->isRunning )
&& ( tr_trackerCanManualAnnounce( tor->tracker ) );
}
/* rcRate's averaging code can make it appear that we're
* still sending bytes after a torrent stops or all the
* peers disconnect, so short-circuit that appearance here */
void
tr_torrentGetRates( const tr_torrent * tor,
float * toClient,
float * toPeer)
{
const int showSpeed = tor->isRunning
&& tr_peerMgrHasConnections( tor->handle->peerMgr, tor->info.hash );
if( toClient )
*toClient = showSpeed ? tr_rcRate( tor->download ) : 0.0;
if( toPeer )
*toPeer = showSpeed ? tr_rcRate( tor->upload ) : 0.0;
}
const tr_info *
tr_torrentInfo( const tr_torrent * tor )
{
return &tor->info;
}
const tr_stat *
tr_torrentStatCached( tr_torrent * tor )
{
const time_t now = time( NULL );
return now == tor->lastStatTime
? &tor->stats[tor->statCur]
: tr_torrentStat( tor );
}
const tr_stat *
tr_torrentStat( tr_torrent * tor )
{
tr_stat * s;
struct tr_tracker * tc;
tr_torrentLock( tor );
tor->lastStatTime = time( NULL );
tr_torrentRecheckCompleteness( tor );
tor->statCur = !tor->statCur;
s = &tor->stats[tor->statCur];
s->error = tor->error;
memcpy( s->errorString, tor->errorString,
sizeof( s->errorString ) );
tc = tor->tracker;
s->tracker = tr_trackerGetAddress( tor->tracker );
tr_peerMgrTorrentStats( tor->handle->peerMgr,
tor->info.hash,
&s->peersKnown,
&s->peersConnected,
&s->peersSendingToUs,
&s->peersGettingFromUs,
s->peersFrom );
s->percentComplete = tr_cpPercentComplete ( tor->completion );
s->percentDone = tr_cpPercentDone( tor->completion );
s->leftUntilDone = tr_cpLeftUntilDone( tor->completion );
if( tor->recheckState == TR_RECHECK_NOW )
s->status = TR_STATUS_CHECK;
else if( tor->recheckState == TR_RECHECK_WAIT )
s->status = TR_STATUS_CHECK_WAIT;
else if( !tor->isRunning )
s->status = TR_STATUS_STOPPED;
else if( tor->cpStatus == TR_CP_INCOMPLETE )
s->status = TR_STATUS_DOWNLOAD;
else if( tor->cpStatus == TR_CP_DONE )
s->status = TR_STATUS_DONE;
else
s->status = TR_STATUS_SEED;
s->recheckProgress =
1.0 - (tr_torrentCountUncheckedPieces( tor ) / (double) tor->info.pieceCount);
tr_torrentGetRates( tor, &s->rateDownload, &s->rateUpload );
tr_trackerGetCounts( tc,
&s->completedFromTracker,
&s->leechers,
&s->seeders );
s->swarmspeed = tr_rcRate( tor->swarmspeed );
s->startDate = tor->startDate;
s->activityDate = tor->activityDate;
s->eta = s->rateDownload < 0.1
? -1.0f
: (s->leftUntilDone / s->rateDownload / 1024.0);
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;
{
int i;
tr_bitfield * availablePieces = tr_peerMgrGetAvailable( tor->handle->peerMgr,
tor->info.hash );
s->desiredSize = 0;
s->desiredAvailable = 0;
for( i=0; i<tor->info.pieceCount; ++i ) {
if( !tor->info.pieces[i].dnd ) {
const uint64_t byteCount = tr_torPieceCountBytes( tor, i );
s->desiredSize += byteCount;
if( tr_bitfieldHas( availablePieces, i ) )
s->desiredAvailable += byteCount;
}
}
/* "availablePieces" can miss our unverified blocks... */
if( s->desiredAvailable < s->haveValid + s->haveUnchecked )
s->desiredAvailable = s->haveValid + s->haveUnchecked;
tr_bitfieldFree( availablePieces );
}
s->ratio = tr_getRatio( s->uploadedEver, MAX( s->downloadedEver, s->haveValid ) );
tr_torrentUnlock( tor );
return s;
}
/***
****
***/
static uint64_t
fileBytesCompleted ( const tr_torrent * tor, int fileIndex )
{
const tr_file * file = &tor->info.files[fileIndex];
const uint64_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 uint64_t lastBlock = (file->offset + lastOffset) / tor->blockSize;
const uint64_t lastBlockOffset = (file->offset + lastOffset) % tor->blockSize;
uint64_t haveBytes = 0;
assert( tor != NULL );
assert( 0<=fileIndex && fileIndex<tor->info.fileCount );
assert( file->offset + file->length <= tor->info.totalSize );
assert( ( (int)firstBlock < tor->blockCount ) || (!file->length && file->offset==tor->info.totalSize) );
assert( ( (int)lastBlock < tor->blockCount ) || (!file->length && file->offset==tor->info.totalSize) );
assert( firstBlock <= lastBlock );
assert( (int)tr_torBlockPiece( tor, firstBlock ) == file->firstPiece );
assert( (int)tr_torBlockPiece( tor, lastBlock ) == file->lastPiece );
if( firstBlock == lastBlock )
{
if( tr_cpBlockIsComplete( tor->completion, firstBlock ) )
haveBytes += lastBlockOffset + 1 - firstBlockOffset;
}
else
{
uint64_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, int * fileCount )
{
int i;
const int 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 tr_file * file = tor->info.files + i;
walk->bytesCompleted = fileBytesCompleted( tor, i );
walk->progress = file->length
? walk->bytesCompleted / (float)file->length
: 1.0;
}
*fileCount = n;
return files;
}
void
tr_torrentFilesFree( tr_file_stat * files, int fileCount UNUSED )
{
tr_free( files );
}
/***
****
***/
tr_peer_stat *
tr_torrentPeers( const tr_torrent * tor, int * peerCount )
{
tr_peer_stat * ret = NULL;
if( tor != NULL )
ret = tr_peerMgrPeerStats( tor->handle->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 )
{
return tr_peerMgrTorrentAvailability( tor->handle->peerMgr,
tor->info.hash,
tab, size );
}
void tr_torrentAmountFinished( const tr_torrent * tor, float * tab, int size )
{
int i;
float interval;
tr_torrentLock( tor );
interval = (float)tor->info.pieceCount / (float)size;
for( i = 0; i < size; i++ )
{
int piece = i * interval;
tab[i] = tr_cpPercentBlocksInPiece( tor->completion, piece );
}
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, int pieceIndex, int has )
{
tr_torrentLock( tor );
assert( tor != NULL );
assert( pieceIndex >= 0 );
assert( pieceIndex < tor->info.pieceCount );
if( has )
tr_cpPieceAdd( tor->completion, pieceIndex );
else
tr_cpPieceRem( tor->completion, pieceIndex );
tr_torrentUnlock( tor );
}
void tr_torrentRemoveSaved( tr_torrent * tor )
{
tr_metainfoRemoveSaved( tor->info.hashString, tor->handle->tag );
}
/***
****
***/
static void
freeTorrent( tr_torrent * tor )
{
tr_torrent * t;
tr_handle * h = tor->handle;
tr_info * inf = &tor->info;
assert( tor != NULL );
assert( !tor->isRunning );
tr_globalLock( h );
tr_peerMgrRemoveTorrent( h->peerMgr, tor->info.hash );
tr_cpClose( tor->completion );
tr_rcClose( tor->upload );
tr_rcClose( tor->download );
tr_rcClose( tor->swarmspeed );
tr_trackerUnsubscribe( tor->tracker, tor->trackerSubscription );
tr_trackerFree( tor->tracker );
tor->tracker = NULL;
tr_bitfieldFree( tor->checkedPieces );
tr_free( tor->destination );
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_inf( "closing torrent %s... %d torrents left",
tor->info.name, h->torrentCount );
tr_metainfoFree( inf );
tr_free( tor );
tr_globalUnlock( h );
}
enum
{
AFTER_RECHECK_NONE,
AFTER_RECHECK_START,
AFTER_RECHECK_STOP,
AFTER_RECHECK_CLOSE
};
static void
checkAndStartImpl( void * vtor )
{
tr_torrent * tor = vtor;
tr_globalLock( tor->handle );
tor->isRunning = 1;
*tor->errorString = '\0';
tr_torrentResetTransferStats( tor );
tor->cpStatus = tr_cpGetStatus( tor->completion );
saveFastResumeNow( tor );
tor->startDate = tr_date( );
tr_trackerStart( tor->tracker );
tr_peerMgrStartTorrent( tor->handle->peerMgr, tor->info.hash );
tr_globalUnlock( tor->handle );
}
static void
checkAndStartCB( tr_torrent * tor )
{
tr_runInEventThread( tor->handle, checkAndStartImpl, tor );
}
void
tr_torrentStart( tr_torrent * tor )
{
tr_globalLock( tor->handle );
if( !tor->isRunning )
{
tr_fastResumeLoad( tor, TR_FR_PROGRESS, NULL );
tor->isRunning = 1;
tr_ioRecheckAdd( tor, checkAndStartCB );
}
tr_globalUnlock( tor->handle );
}
static void
torrentRecheckDoneImpl( void * vtor )
{
tr_torrentRecheckCompleteness( vtor );
}
static void
torrentRecheckDoneCB( tr_torrent * tor )
{
tr_runInEventThread( tor->handle, torrentRecheckDoneImpl, tor );
}
void
tr_torrentRecheck( tr_torrent * tor )
{
tr_globalLock( tor->handle );
tr_torrentUncheck( tor );
tr_ioRecheckAdd( tor, torrentRecheckDoneCB );
tr_globalUnlock( tor->handle );
}
static void
stopTorrent( void * vtor )
{
int i;
tr_torrent * tor = vtor;
tr_ioRecheckRemove( tor );
tr_peerMgrStopTorrent( tor->handle->peerMgr, tor->info.hash );
tr_trackerStop( tor->tracker );
for( i=0; i<tor->info.fileCount; ++i )
{
char path[MAX_PATH_LENGTH];
const tr_file * file = &tor->info.files[i];
tr_buildPath( path, sizeof(path), tor->destination, file->name, NULL );
tr_fdFileClose( path );
}
}
void
tr_torrentStop( tr_torrent * tor )
{
tr_globalLock( tor->handle );
saveFastResumeNow( tor );
tor->isRunning = 0;
tr_runInEventThread( tor->handle, stopTorrent, tor );
tr_globalUnlock( tor->handle );
}
static void
closeTorrent( void * vtor )
{
tr_torrent * tor = vtor;
saveFastResumeNow( tor );
tor->isRunning = 0;
stopTorrent( tor );
freeTorrent( tor );
}
void
tr_torrentClose( tr_torrent * tor )
{
tr_globalLock( tor->handle );
tr_torrentClearStatusCallback( tor );
tr_runInEventThread( tor->handle, closeTorrent, tor );
tr_globalUnlock( tor->handle );
}
/**
*** Completeness
**/
static void
fireStatusChange( tr_torrent * tor, cp_status_t status )
{
assert( tor != NULL );
assert( status==TR_CP_INCOMPLETE || status==TR_CP_DONE || status==TR_CP_COMPLETE );
if( tor->status_func != NULL )
(tor->status_func)( tor, status, tor->status_func_user_data );
}
void
tr_torrentSetStatusCallback( tr_torrent * tor,
tr_torrent_status_func func,
void * user_data )
{
assert( tor != NULL );
tor->status_func = func;
tor->status_func_user_data = user_data;
}
void
tr_torrentClearStatusCallback( tr_torrent * torrent )
{
tr_torrentSetStatusCallback( torrent, NULL, NULL );
}
void
tr_torrentRecheckCompleteness( tr_torrent * tor )
{
cp_status_t cpStatus;
tr_torrentLock( tor );
cpStatus = tr_cpGetStatus( tor->completion );
if( cpStatus != tor->cpStatus ) {
tor->cpStatus = cpStatus;
fireStatusChange( tor, cpStatus );
if( (cpStatus == TR_CP_COMPLETE) /* ...and if we're complete */
&& tor->downloadedCur ) { /* and it just happened */
tr_trackerCompleted( tor->tracker ); /* tell the tracker */
}
saveFastResumeNow( tor );
}
tr_torrentUnlock( tor );
}
int
tr_torrentIsSeed( const tr_torrent * tor )
{
return tor->cpStatus==TR_CP_COMPLETE || tor->cpStatus==TR_CP_DONE;
}
/**
*** File priorities
**/
void
tr_torrentInitFilePriority( tr_torrent * tor,
int fileIndex,
tr_priority_t priority )
{
int i;
tr_file * file;
assert( tor != NULL );
assert( 0<=fileIndex && 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,
int * files,
int fileCount,
tr_priority_t priority )
{
int i;
tr_torrentLock( tor );
for( i=0; i<fileCount; ++i )
tr_torrentInitFilePriority( tor, files[i], priority );
saveFastResumeNow( tor );
tr_torrentUnlock( tor );
}
tr_priority_t
tr_torrentGetFilePriority( const tr_torrent * tor, int file )
{
tr_priority_t ret;
tr_torrentLock( tor );
assert( tor != NULL );
assert( 0<=file && file<tor->info.fileCount );
ret = tor->info.files[file].priority;
tr_torrentUnlock( tor );
return ret;
}
tr_priority_t*
tr_torrentGetFilePriorities( const tr_torrent * tor )
{
int 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,
int file )
{
int doDownload;
tr_torrentLock( tor );
assert( 0<=file && file<tor->info.fileCount );
doDownload = !tor->info.files[file].dnd;
tr_torrentUnlock( tor );
return doDownload != 0;
}
static void
setFileDND( tr_torrent * tor,
int fileIndex,
int doDownload )
{
tr_file * file;
const int dnd = !doDownload;
int firstPiece, firstPieceDND;
int lastPiece, lastPieceDND;
int 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;
for( i=fileIndex-1; firstPieceDND && i>=0; --i ) {
if( tor->info.files[i].lastPiece != firstPiece )
break;
firstPieceDND = tor->info.files[i].dnd;
}
/* 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
{
tor->info.pieces[firstPiece].dnd = firstPieceDND;
tor->info.pieces[lastPiece].dnd = lastPieceDND;
for( i=firstPiece+1; i<lastPiece; ++i )
tor->info.pieces[i].dnd = dnd;
}
}
void
tr_torrentInitFileDLs ( tr_torrent * tor,
int * files,
int fileCount,
int doDownload )
{
int 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,
int * files,
int fileCount,
int doDownload )
{
tr_torrentLock( tor );
tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
saveFastResumeNow( tor );
tr_torrentUnlock( tor );
}
/***
****
***/
void
tr_torrentSetMaxConnectedPeers( tr_torrent * tor,
uint16_t maxConnectedPeers )
{
tor->maxConnectedPeers = maxConnectedPeers;
}
void
tr_torrentSetMaxUnchokedPeers( tr_torrent * tor,
uint8_t maxUnchokedPeers )
{
tor->maxUnchokedPeers = maxUnchokedPeers;
}
uint16_t
tr_torrentGetMaxConnectedPeers( const tr_torrent * tor )
{
return tor->maxConnectedPeers;
}
uint8_t
tr_torrentGetMaxUnchokedPeers( const tr_torrent * tor )
{
return tor->maxUnchokedPeers;
}
/***
****
***/
int _tr_block( const tr_torrent * tor, int index, int begin )
{
const tr_info * inf = &tor->info;
return index * ( inf->pieceSize / tor->blockSize ) +
begin / tor->blockSize;
}
uint64_t
tr_pieceOffset( const tr_torrent * tor, int index, int begin, int length )
{
uint64_t ret;
ret = tor->info.pieceSize;
ret *= index;
ret += begin;
ret += length;
return ret;
}
/***
****
***/
int
tr_torrentIsPieceChecked( const tr_torrent * tor, int piece )
{
return tr_bitfieldHas( tor->checkedPieces, piece );
}
void
tr_torrentSetPieceChecked( tr_torrent * tor, int piece, int isChecked )
{
if( isChecked )
tr_bitfieldAdd( tor->checkedPieces, piece );
else
tr_bitfieldRem( tor->checkedPieces, piece );
}
void
tr_torrentSetFileChecked( tr_torrent * tor, int fileIndex, int isChecked )
{
const tr_file * file = &tor->info.files[fileIndex];
const size_t begin = file->firstPiece;
const size_t end = file->lastPiece + 1;
if( isChecked )
tr_bitfieldAddRange ( tor->checkedPieces, begin, end );
else
tr_bitfieldRemRange ( tor->checkedPieces, begin, end );
}
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 );
}
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