706 lines
19 KiB
C
706 lines
19 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005-2007 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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#include "transmission.h"
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#include "shared.h"
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/***********************************************************************
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* Local prototypes
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**********************************************************************/
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static tr_torrent_t * torrentRealInit( tr_handle_t *, tr_torrent_t * tor,
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int flags, int * error );
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static void torrentReallyStop( tr_torrent_t * );
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static void downloadLoop( void * );
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void tr_setUseCustomLimit( tr_torrent_t * tor, int limit )
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{
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tor->customSpeedLimit = limit;
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}
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void tr_setUploadLimit( tr_torrent_t * tor, int limit )
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{
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tr_rcSetLimit( tor->upload, limit );
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}
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void tr_setDownloadLimit( tr_torrent_t * tor, int limit )
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{
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tr_rcSetLimit( tor->download, limit );
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}
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tr_torrent_t * tr_torrentInit( tr_handle_t * h, const char * path,
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int flags, int * error )
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{
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tr_torrent_t * tor = calloc( sizeof( tr_torrent_t ), 1 );
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int saveCopy = ( TR_FSAVEPRIVATE & flags );
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/* Parse torrent file */
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if( tr_metainfoParse( &tor->info, path, NULL, saveCopy ) )
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{
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*error = TR_EINVALID;
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free( tor );
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return NULL;
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}
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return torrentRealInit( h, tor, flags, error );
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}
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tr_torrent_t * tr_torrentInitSaved( tr_handle_t * h, const char * hashStr,
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int flags, int * error )
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{
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tr_torrent_t * tor = calloc( sizeof( tr_torrent_t ), 1 );
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/* Parse torrent file */
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if( tr_metainfoParse( &tor->info, NULL, hashStr, 0 ) )
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{
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*error = TR_EINVALID;
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free( tor );
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return NULL;
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}
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return torrentRealInit( h, tor, ( TR_FSAVEPRIVATE | flags ), error );
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}
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/***********************************************************************
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* tr_torrentInit
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***********************************************************************
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* Allocates a tr_torrent_t structure, then relies on tr_metainfoParse
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* to fill it.
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**********************************************************************/
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static tr_torrent_t * torrentRealInit( tr_handle_t * h, tr_torrent_t * tor,
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int flags, int * error )
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{
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tr_torrent_t * tor_tmp;
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tr_info_t * inf;
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int i;
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inf = &tor->info;
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inf->flags = flags;
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/* Make sure this torrent is not already open */
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for( tor_tmp = h->torrentList; tor_tmp; tor_tmp = tor_tmp->next )
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{
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if( !memcmp( tor->info.hash, tor_tmp->info.hash,
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SHA_DIGEST_LENGTH ) )
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{
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*error = TR_EDUPLICATE;
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tr_metainfoFree( &tor->info );
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free( tor );
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return NULL;
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}
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}
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tor->handle = h;
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tor->status = TR_STATUS_PAUSE;
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tor->id = h->id;
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tor->key = h->key;
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tor->bindPort = &h->bindPort;
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tor->finished = 0;
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/* Escaped info hash for HTTP queries */
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for( i = 0; i < SHA_DIGEST_LENGTH; i++ )
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{
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sprintf( &tor->escapedHashString[3*i], "%%%02x", inf->hash[i] );
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}
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/* Block size: usually 16 ko, or less if we have to */
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tor->blockSize = MIN( inf->pieceSize, 1 << 14 );
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tor->blockCount = ( inf->totalSize + tor->blockSize - 1 ) /
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tor->blockSize;
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tor->completion = tr_cpInit( tor );
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tr_lockInit( &tor->lock );
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tr_condInit( &tor->cond );
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tor->upload = tr_rcInit();
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tor->download = tr_rcInit();
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tor->swarmspeed = tr_rcInit();
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/* We have a new torrent */
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tr_sharedLock( h->shared );
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tor->prev = NULL;
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tor->next = h->torrentList;
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if( tor->next )
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{
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tor->next->prev = tor;
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}
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h->torrentList = tor;
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(h->torrentCount)++;
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tr_sharedUnlock( h->shared );
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if( 0 > h->bindPort )
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{
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tr_setBindPort( h, TR_DEFAULT_PORT );
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}
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return tor;
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}
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tr_info_t * tr_torrentInfo( tr_torrent_t * tor )
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{
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return &tor->info;
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}
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/***********************************************************************
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* tr_torrentScrape
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**********************************************************************/
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int tr_torrentScrape( tr_torrent_t * tor, int * s, int * l, int * d )
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{
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return tr_trackerScrape( tor, s, l, d );
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}
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void tr_torrentSetFolder( tr_torrent_t * tor, const char * path )
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{
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tor->destination = strdup( path );
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tr_ioLoadResume( tor );
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}
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char * tr_torrentGetFolder( tr_torrent_t * tor )
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{
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return tor->destination;
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}
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void tr_torrentStart( tr_torrent_t * tor )
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{
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char name[32];
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if( tor->status & ( TR_STATUS_STOPPING | TR_STATUS_STOPPED ) )
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{
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/* Join the thread first */
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torrentReallyStop( tor );
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}
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tor->downloadedPrev += tor->downloadedCur;
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tor->downloadedCur = 0;
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tor->uploadedPrev += tor->uploadedCur;
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tor->uploadedCur = 0;
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tor->status = TR_STATUS_CHECK;
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tor->error = TR_OK;
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tor->tracker = tr_trackerInit( tor );
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tor->date = tr_date();
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tor->die = 0;
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snprintf( name, sizeof( name ), "torrent %p", tor );
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tr_threadCreate( &tor->thread, downloadLoop, tor, name );
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}
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static void torrentStop( tr_torrent_t * tor )
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{
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tr_trackerStopped( tor->tracker );
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tr_rcReset( tor->download );
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tr_rcReset( tor->upload );
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tr_rcReset( tor->swarmspeed );
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tor->status = TR_STATUS_STOPPING;
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tor->stopDate = tr_date();
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}
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void tr_torrentStop( tr_torrent_t * tor )
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{
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tr_lockLock( &tor->lock );
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torrentStop( tor );
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/* Don't return until the files are closed, so the UI can trash
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* them if requested */
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tr_condWait( &tor->cond, &tor->lock );
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tr_lockUnlock( &tor->lock );
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}
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/***********************************************************************
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* torrentReallyStop
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***********************************************************************
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* Joins the download thread and frees/closes everything related to it.
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**********************************************************************/
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static void torrentReallyStop( tr_torrent_t * tor )
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{
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int i;
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tor->die = 1;
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tr_threadJoin( &tor->thread );
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tr_trackerClose( tor->tracker );
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tor->tracker = NULL;
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tr_lockLock( &tor->lock );
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for( i = 0; i < tor->peerCount; i++ )
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{
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tr_peerDestroy( tor->peers[i] );
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}
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tor->peerCount = 0;
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tr_lockUnlock( &tor->lock );
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}
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int tr_getFinished( tr_torrent_t * tor )
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{
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if( tor->finished )
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{
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tor->finished = 0;
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return 1;
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}
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return 0;
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}
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void tr_manualUpdate( tr_torrent_t * tor )
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{
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int peerCount;
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uint8_t * peerCompact;
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if( !( tor->status & TR_STATUS_ACTIVE ) )
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return;
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tr_lockLock( &tor->lock );
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tr_trackerAnnouncePulse( tor->tracker, &peerCount, &peerCompact, 1 );
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if( peerCount > 0 )
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{
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tr_torrentAddCompact( tor, peerCompact, peerCount );
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free( peerCompact );
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}
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tr_lockUnlock( &tor->lock );
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}
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tr_stat_t * tr_torrentStat( tr_torrent_t * tor )
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{
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tr_stat_t * s;
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tr_peer_t * peer;
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tr_info_t * inf = &tor->info;
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tr_tracker_t * tc;
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int i;
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tor->statCur = ( tor->statCur + 1 ) % 2;
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s = &tor->stats[tor->statCur];
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if( ( tor->status & TR_STATUS_STOPPED ) ||
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( ( tor->status & TR_STATUS_STOPPING ) &&
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tr_date() > tor->stopDate + 60000 ) )
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{
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torrentReallyStop( tor );
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tor->status = TR_STATUS_PAUSE;
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}
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tr_lockLock( &tor->lock );
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s->status = tor->status;
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s->error = tor->error;
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memcpy( s->errorString, tor->errorString,
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sizeof( s->errorString ) );
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tc = tor->tracker;
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s->cannotConnect = tr_trackerCannotConnect( tc );
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if( tc )
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{
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s->trackerAddress = tr_trackerAddress( tc );
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s->trackerPort = tr_trackerPort( tc );
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s->trackerAnnounce = tr_trackerAnnounce( tc );
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}
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else
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{
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s->trackerAddress = inf->trackerList[0].list[0].address;
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s->trackerPort = inf->trackerList[0].list[0].port;
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s->trackerAnnounce = inf->trackerList[0].list[0].announce;
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}
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s->peersTotal = 0;
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s->peersIncoming = 0;
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s->peersUploading = 0;
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s->peersDownloading = 0;
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for( i = 0; i < tor->peerCount; i++ )
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{
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peer = tor->peers[i];
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if( tr_peerIsConnected( peer ) )
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{
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(s->peersTotal)++;
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if( tr_peerIsIncoming( peer ) )
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{
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(s->peersIncoming)++;
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}
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if( !tr_peerIsChoking( peer ) )
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{
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(s->peersUploading)++;
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}
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if( tr_peerIsUnchoked( peer ) )
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{
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(s->peersDownloading)++;
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}
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}
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}
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s->progress = tr_cpCompletionAsFloat( tor->completion );
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if( tor->status & TR_STATUS_DOWNLOAD )
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{
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s->rateDownload = tr_rcRate( tor->download );
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}
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else
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{
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/* tr_rcRate() doesn't make the difference between 'piece'
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messages and other messages, which causes a non-zero
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download rate even tough we are not downloading. So we
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force it to zero not to confuse the user. */
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s->rateDownload = 0.0;
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}
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s->rateUpload = tr_rcRate( tor->upload );
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s->seeders = tr_trackerSeeders( tc );
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s->leechers = tr_trackerLeechers( tc );
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s->completedFromTracker = tr_trackerDownloaded( tc );
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s->swarmspeed = tr_rcRate( tor->swarmspeed );
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if( s->rateDownload < 0.1 )
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{
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s->eta = -1;
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}
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else
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{
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s->eta = ( 1.0 - s->progress ) *
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(float) inf->totalSize / s->rateDownload / 1024.0;
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}
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s->downloaded = tor->downloadedCur + tor->downloadedPrev;
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s->uploaded = tor->uploadedCur + tor->uploadedPrev;
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if( s->downloaded == 0 )
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{
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s->ratio = s->uploaded == 0 ? TR_RATIO_NA : TR_RATIO_INF;
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}
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else
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{
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s->ratio = (float)s->uploaded / (float)s->downloaded;
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}
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tr_lockUnlock( &tor->lock );
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return s;
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}
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tr_peer_stat_t * tr_torrentPeers( tr_torrent_t * tor, int * peerCount )
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{
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tr_peer_stat_t * peers;
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tr_lockLock( &tor->lock );
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*peerCount = tor->peerCount;
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peers = (tr_peer_stat_t *) calloc( tor->peerCount, sizeof( tr_peer_stat_t ) );
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if (peers != NULL)
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{
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tr_peer_t * peer;
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struct in_addr * addr;
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int i;
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for( i = 0; i < tor->peerCount; i++ )
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{
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peer = tor->peers[i];
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addr = tr_peerAddress( peer );
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if( NULL != addr )
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{
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tr_netNtop( addr, peers[i].addr,
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sizeof( peers[i].addr ) );
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}
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peers[i].client = tr_clientForId(tr_peerId(peer));
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peers[i].isConnected = tr_peerIsConnected( peer );
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peers[i].isIncoming = tr_peerIsIncoming( peer );
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peers[i].progress = tr_peerProgress( peer );
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peers[i].port = tr_peerPort( peer );
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if( ( peers[i].isDownloading = tr_peerIsUnchoked( peer ) ) )
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{
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peers[i].uploadToRate = tr_peerUploadRate( peer );
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}
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if( ( peers[i].isUploading = !tr_peerIsChoking( peer ) ) )
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{
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peers[i].downloadFromRate = tr_peerDownloadRate( peer );
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}
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}
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}
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tr_lockUnlock( &tor->lock );
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return peers;
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}
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void tr_torrentPeersFree( tr_peer_stat_t * peers, int peerCount )
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{
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int i;
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if (peers == NULL)
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return;
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for (i = 0; i < peerCount; i++)
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free( peers[i].client );
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free( peers );
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}
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void tr_torrentAvailability( tr_torrent_t * tor, int8_t * tab, int size )
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{
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int i, j, piece;
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tr_lockLock( &tor->lock );
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for( i = 0; i < size; i++ )
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{
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piece = i * tor->info.pieceCount / size;
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if( tr_cpPieceIsComplete( tor->completion, piece ) )
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{
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tab[i] = -1;
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continue;
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}
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tab[i] = 0;
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for( j = 0; j < tor->peerCount; j++ )
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{
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if( tr_peerBitfield( tor->peers[j] ) &&
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tr_bitfieldHas( tr_peerBitfield( tor->peers[j] ), piece ) )
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{
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(tab[i])++;
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}
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}
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}
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tr_lockUnlock( &tor->lock );
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}
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void tr_torrentAmountFinished( tr_torrent_t * tor, float * tab, int size )
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{
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int i, piece;
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tr_lockLock( &tor->lock );
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for( i = 0; i < size; i++ )
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{
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piece = i * tor->info.pieceCount / size;
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tab[i] = tr_cpPercentBlocksInPiece( tor->completion, piece );
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}
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tr_lockUnlock( &tor->lock );
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}
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void tr_torrentRemoveSaved( tr_torrent_t * tor )
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{
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tr_metainfoRemoveSaved( tor->info.hashString );
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}
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/***********************************************************************
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* tr_torrentClose
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***********************************************************************
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* Frees memory allocated by tr_torrentInit.
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**********************************************************************/
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void tr_torrentClose( tr_handle_t * h, tr_torrent_t * tor )
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{
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tr_info_t * inf = &tor->info;
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if( tor->status & ( TR_STATUS_STOPPING | TR_STATUS_STOPPED ) )
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{
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/* Join the thread first */
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torrentReallyStop( tor );
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}
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tr_sharedLock( h->shared );
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h->torrentCount--;
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tr_lockClose( &tor->lock );
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tr_condClose( &tor->cond );
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tr_cpClose( tor->completion );
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tr_rcClose( tor->upload );
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tr_rcClose( tor->download );
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tr_rcClose( tor->swarmspeed );
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if( tor->destination )
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{
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free( tor->destination );
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}
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tr_metainfoFree( inf );
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if( tor->prev )
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{
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tor->prev->next = tor->next;
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}
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else
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{
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h->torrentList = tor->next;
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}
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if( tor->next )
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{
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tor->next->prev = tor->prev;
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}
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free( tor );
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tr_sharedUnlock( h->shared );
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}
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void tr_torrentAttachPeer( tr_torrent_t * tor, tr_peer_t * peer )
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|
{
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|
int i;
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|
tr_peer_t * otherPeer;
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|
|
|
if( tor->peerCount >= TR_MAX_PEER_COUNT )
|
|
{
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|
tr_peerDestroy( peer );
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|
return;
|
|
}
|
|
|
|
/* Don't accept two connections from the same IP */
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|
for( i = 0; i < tor->peerCount; i++ )
|
|
{
|
|
otherPeer = tor->peers[i];
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|
if( !memcmp( tr_peerAddress( peer ), tr_peerAddress( otherPeer ), 4 ) )
|
|
{
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|
tr_peerDestroy( peer );
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return;
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|
}
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|
}
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|
|
|
tr_peerSetTorrent( peer, tor );
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|
tor->peers[tor->peerCount++] = peer;
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|
}
|
|
|
|
void tr_torrentAddCompact( tr_torrent_t * tor, uint8_t * buf, int count )
|
|
{
|
|
struct in_addr addr;
|
|
in_port_t port;
|
|
int i;
|
|
tr_peer_t * peer;
|
|
|
|
for( i = 0; i < count; i++ )
|
|
{
|
|
memcpy( &addr, buf, 4 ); buf += 4;
|
|
memcpy( &port, buf, 2 ); buf += 2;
|
|
|
|
peer = tr_peerInit( addr, port, -1 );
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|
tr_torrentAttachPeer( tor, peer );
|
|
}
|
|
}
|
|
|
|
/***********************************************************************
|
|
* downloadLoop
|
|
**********************************************************************/
|
|
static void downloadLoop( void * _tor )
|
|
{
|
|
tr_torrent_t * tor = _tor;
|
|
int i, ret;
|
|
int peerCount;
|
|
uint8_t * peerCompact;
|
|
tr_peer_t * peer;
|
|
|
|
tr_lockLock( &tor->lock );
|
|
|
|
tr_cpReset( tor->completion );
|
|
tor->io = tr_ioInit( tor );
|
|
tor->status = tr_cpIsSeeding( tor->completion ) ?
|
|
TR_STATUS_SEED : TR_STATUS_DOWNLOAD;
|
|
|
|
while( !tor->die )
|
|
{
|
|
tr_lockUnlock( &tor->lock );
|
|
tr_wait( 20 );
|
|
tr_lockLock( &tor->lock );
|
|
|
|
/* Are we finished ? */
|
|
if( ( tor->status & TR_STATUS_DOWNLOAD ) &&
|
|
tr_cpIsSeeding( tor->completion ) )
|
|
{
|
|
/* Done */
|
|
tor->status = TR_STATUS_SEED;
|
|
tor->finished = 1;
|
|
tr_trackerCompleted( tor->tracker );
|
|
tr_ioSync( tor->io );
|
|
}
|
|
|
|
/* Try to get new peers or to send a message to the tracker */
|
|
tr_trackerPulse( tor->tracker, &peerCount, &peerCompact );
|
|
if( peerCount > 0 )
|
|
{
|
|
tr_torrentAddCompact( tor, peerCompact, peerCount );
|
|
free( peerCompact );
|
|
}
|
|
if( tor->status & TR_STATUS_STOPPED )
|
|
{
|
|
break;
|
|
}
|
|
|
|
/* Stopping: make sure all files are closed and stop talking
|
|
to peers */
|
|
if( tor->status & TR_STATUS_STOPPING )
|
|
{
|
|
if( tor->io )
|
|
{
|
|
tr_ioClose( tor->io ); tor->io = NULL;
|
|
tr_condSignal( &tor->cond );
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* Shuffle peers */
|
|
if( tor->peerCount > 1 )
|
|
{
|
|
peer = tor->peers[0];
|
|
memmove( &tor->peers[0], &tor->peers[1],
|
|
( tor->peerCount - 1 ) * sizeof( void * ) );
|
|
tor->peers[tor->peerCount - 1] = peer;
|
|
}
|
|
|
|
/* Receive/send messages */
|
|
for( i = 0; i < tor->peerCount; )
|
|
{
|
|
peer = tor->peers[i];
|
|
|
|
ret = tr_peerPulse( peer );
|
|
if( ret & TR_ERROR_IO_MASK )
|
|
{
|
|
tr_err( "Fatal error, stopping download (%d)", ret );
|
|
torrentStop( tor );
|
|
tor->error = ret;
|
|
snprintf( tor->errorString, sizeof( tor->errorString ),
|
|
"%s", tr_errorString( ret ) );
|
|
break;
|
|
}
|
|
if( ret )
|
|
{
|
|
tr_peerDestroy( peer );
|
|
tor->peerCount--;
|
|
memmove( &tor->peers[i], &tor->peers[i+1],
|
|
( tor->peerCount - i ) * sizeof( void * ) );
|
|
continue;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
tr_lockUnlock( &tor->lock );
|
|
|
|
if( tor->io )
|
|
{
|
|
tr_ioClose( tor->io ); tor->io = NULL;
|
|
tr_condSignal( &tor->cond );
|
|
}
|
|
|
|
tor->status = TR_STATUS_STOPPED;
|
|
}
|
|
|