411 lines
13 KiB
C
411 lines
13 KiB
C
/*
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* This file Copyright (C) 2009 Mnemosyne LLC
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2(b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#ifndef __TRANSMISSION__
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#error only libtransmission should #include this header.
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#endif
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#ifndef TR_TORRENT_H
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#define TR_TORRENT_H 1
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#include "completion.h" /* tr_completion */
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#include "ratecontrol.h" /* tr_ratecontrol */
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#include "session.h" /* tr_globalLock(), tr_globalUnlock() */
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#include "utils.h" /* TR_GNUC_PRINTF */
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struct tr_bandwidth;
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struct tr_ratecontrol;
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struct tr_torrent_tiers;
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struct tr_magnet_info;
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/**
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*** Package-visible ctor API
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**/
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void tr_ctorSetSave( tr_ctor * ctor,
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tr_bool saveMetadataInOurTorrentsDir );
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int tr_ctorGetSave( const tr_ctor * ctor );
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int tr_ctorGetMagnet( const tr_ctor * ctor, const struct tr_magnet_info ** setme );
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void tr_ctorInitTorrentPriorities( const tr_ctor * ctor, tr_torrent * tor );
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void tr_ctorInitTorrentWanted( const tr_ctor * ctor, tr_torrent * tor );
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/**
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***
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**/
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/* just like tr_torrentSetFileDLs but doesn't trigger a fastresume save */
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void tr_torrentInitFileDLs( tr_torrent * tor,
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tr_file_index_t * files,
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tr_file_index_t fileCount,
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tr_bool do_download );
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void tr_torrentRecheckCompleteness( tr_torrent * );
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void tr_torrentSetHasPiece( tr_torrent * tor,
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tr_piece_index_t pieceIndex,
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tr_bool has );
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void tr_torrentChangeMyPort( tr_torrent * session );
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tr_torrent* tr_torrentFindFromHashString( tr_session * session,
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const char * hashString );
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tr_torrent* tr_torrentFindFromObfuscatedHash( tr_session * session,
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const uint8_t * hash );
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tr_bool tr_torrentIsPieceTransferAllowed( const tr_torrent * torrent,
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tr_direction direction );
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#define tr_block( a, b ) _tr_block( tor, a, b )
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tr_block_index_t _tr_block( const tr_torrent * tor,
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tr_piece_index_t index,
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uint32_t offset );
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tr_bool tr_torrentReqIsValid( const tr_torrent * tor,
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tr_piece_index_t index,
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uint32_t offset,
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uint32_t length );
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uint64_t tr_pieceOffset( const tr_torrent * tor,
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tr_piece_index_t index,
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uint32_t offset,
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uint32_t length );
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void tr_torrentInitFilePriority( tr_torrent * tor,
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tr_file_index_t fileIndex,
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tr_priority_t priority );
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int tr_torrentCountUncheckedPieces( const tr_torrent * );
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tr_bool tr_torrentIsFileChecked( const tr_torrent * tor,
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tr_file_index_t file );
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void tr_torrentSetPieceChecked( tr_torrent * tor,
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tr_piece_index_t piece,
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tr_bool isChecked );
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void tr_torrentSetFileChecked( tr_torrent * tor,
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tr_file_index_t file,
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tr_bool isChecked );
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void tr_torrentUncheck( tr_torrent * tor );
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int tr_torrentPromoteTracker( tr_torrent * tor,
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int trackerIndex );
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time_t* tr_torrentGetMTimes( const tr_torrent * tor,
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size_t * setmeCount );
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tr_torrent* tr_torrentNext( tr_session * session,
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tr_torrent * current );
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void tr_torrentCheckSeedRatio( tr_torrent * tor );
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/** save a torrent's .resume file if it's changed since the last time it was saved */
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void tr_torrentSave( tr_torrent * tor );
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void tr_torrentSetLocalError( tr_torrent * tor, const char * fmt, ... ) TR_GNUC_PRINTF( 2, 3 );
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typedef enum
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{
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TR_VERIFY_NONE,
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TR_VERIFY_WAIT,
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TR_VERIFY_NOW
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}
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tr_verify_state;
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void tr_torrentSetVerifyState( tr_torrent * tor,
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tr_verify_state state );
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struct tr_incomplete_metadata;
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struct tr_torrent
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{
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tr_session * session;
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tr_info info;
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int magicNumber;
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tr_stat_errtype error;
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char errorString[128];
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uint8_t obfuscatedHash[SHA_DIGEST_LENGTH];
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/* Used when the torrent has been created with a magnet link
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* and we're in the process of downloading the metainfo from
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* other peers */
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struct tr_incomplete_metadata * incompleteMetadata;
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/* If the initiator of the connection receives a handshake in which the
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* peer_id does not match the expected peerid, then the initiator is
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* expected to drop the connection. Note that the initiator presumably
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* received the peer information from the tracker, which includes the
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* peer_id that was registered by the peer. The peer_id from the tracker
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* and in the handshake are expected to match.
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*/
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uint8_t * peer_id;
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/* Where the files will be when it's complete */
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char * downloadDir;
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/* Where the files are when the torrent is incomplete */
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char * incompleteDir;
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/* Length, in bytes, of the "info" dict in the .torrent file */
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int infoDictLength;
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/* Offset, in bytes, of the beginning of the "info" dict in the .torrent file */
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int infoDictOffset;
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/* Where the files are now.
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* This pointer will be equal to downloadDir or incompleteDir */
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const char * currentDir;
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/* How many bytes we ask for per request */
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uint32_t blockSize;
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tr_block_index_t blockCount;
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uint32_t lastBlockSize;
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uint32_t lastPieceSize;
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uint32_t blockCountInPiece;
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uint32_t blockCountInLastPiece;
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struct tr_completion completion;
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struct tr_bitfield checkedPieces;
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tr_completeness completeness;
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struct tr_torrent_tiers * tiers;
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struct tr_publisher_tag * tiersSubscription;
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time_t dhtAnnounceAt;
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time_t dhtAnnounce6At;
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tr_bool dhtAnnounceInProgress;
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tr_bool dhtAnnounce6InProgress;
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uint64_t downloadedCur;
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uint64_t downloadedPrev;
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uint64_t uploadedCur;
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uint64_t uploadedPrev;
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uint64_t corruptCur;
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uint64_t corruptPrev;
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uint64_t etaDLSpeedCalculatedAt;
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double etaDLSpeed;
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uint64_t etaULSpeedCalculatedAt;
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double etaULSpeed;
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time_t addedDate;
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time_t activityDate;
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time_t doneDate;
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time_t startDate;
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time_t anyDate;
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tr_torrent_metadata_func * metadata_func;
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void * metadata_func_user_data;
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tr_torrent_completeness_func * completeness_func;
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void * completeness_func_user_data;
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tr_torrent_ratio_limit_hit_func * ratio_limit_hit_func;
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void * ratio_limit_hit_func_user_data;
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tr_bool isRunning;
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tr_bool isDeleting;
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tr_bool needsSeedRatioCheck;
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tr_bool startAfterVerify;
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tr_bool isDirty;
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uint16_t maxConnectedPeers;
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tr_verify_state verifyState;
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time_t lastStatTime;
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tr_stat stats;
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tr_torrent * next;
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int uniqueId;
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struct tr_bandwidth * bandwidth;
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struct tr_torrent_peers * torrentPeers;
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double desiredRatio;
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tr_ratiolimit ratioLimitMode;
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uint64_t preVerifyTotal;
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};
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/* get the index of this piece's first block */
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static TR_INLINE tr_block_index_t
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tr_torPieceFirstBlock( const tr_torrent * tor, const tr_piece_index_t piece )
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{
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return piece * tor->blockCountInPiece;
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}
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/* what piece index is this block in? */
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static TR_INLINE tr_piece_index_t
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tr_torBlockPiece( const tr_torrent * tor, const tr_block_index_t block )
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{
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return block / tor->blockCountInPiece;
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}
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/* how many blocks are in this piece? */
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static TR_INLINE uint32_t
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tr_torPieceCountBlocks( const tr_torrent * tor, const tr_piece_index_t piece )
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{
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return piece == tor->info.pieceCount - 1 ? tor->blockCountInLastPiece
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: tor->blockCountInPiece;
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}
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/* how many bytes are in this piece? */
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static TR_INLINE uint32_t
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tr_torPieceCountBytes( const tr_torrent * tor, const tr_piece_index_t piece )
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{
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return piece == tor->info.pieceCount - 1 ? tor->lastPieceSize
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: tor->info.pieceSize;
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}
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/* how many bytes are in this block? */
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static TR_INLINE uint32_t
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tr_torBlockCountBytes( const tr_torrent * tor, const tr_block_index_t block )
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{
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return block == tor->blockCount - 1 ? tor->lastBlockSize
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: tor->blockSize;
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}
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static TR_INLINE void tr_torrentLock( const tr_torrent * tor )
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{
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tr_globalLock( tor->session );
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}
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static TR_INLINE void tr_torrentUnlock( const tr_torrent * tor )
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{
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tr_globalUnlock( tor->session );
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}
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static TR_INLINE tr_bool
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tr_torrentExists( const tr_session * session, const uint8_t * torrentHash )
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{
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return tr_torrentFindFromHash( (tr_session*)session, torrentHash ) != NULL;
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}
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static TR_INLINE tr_bool
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tr_torrentIsSeed( const tr_torrent * tor )
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{
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return tor->completeness != TR_LEECH;
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}
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static TR_INLINE tr_bool tr_torrentIsPrivate( const tr_torrent * tor )
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{
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return ( tor != NULL ) && tor->info.isPrivate;
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}
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static TR_INLINE tr_bool tr_torrentAllowsPex( const tr_torrent * tor )
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{
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return ( tor != NULL )
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&& ( tor->session->isPexEnabled )
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&& ( !tr_torrentIsPrivate( tor ) );
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}
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static TR_INLINE tr_bool tr_torrentAllowsDHT( const tr_torrent * tor )
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{
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return ( tor != NULL )
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&& ( tr_sessionAllowsDHT( tor->session ) )
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&& ( !tr_torrentIsPrivate( tor ) );
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}
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static TR_INLINE tr_bool tr_torrentIsPieceChecked( const tr_torrent * tor,
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tr_piece_index_t i )
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{
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return tr_bitfieldHasFast( &tor->checkedPieces, i );
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}
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/***
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****
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***/
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enum
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{
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TORRENT_MAGIC_NUMBER = 95549
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};
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static TR_INLINE tr_bool tr_isTorrent( const tr_torrent * tor )
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{
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return ( tor != NULL )
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&& ( tor->magicNumber == TORRENT_MAGIC_NUMBER )
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&& ( tr_isSession( tor->session ) );
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}
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/* set a flag indicating that the torrent's .resume file
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* needs to be saved when the torrent is closed */
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static TR_INLINE
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void tr_torrentSetDirty( tr_torrent * tor )
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{
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assert( tr_isTorrent( tor ) );
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tor->isDirty = TRUE;
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}
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static TR_INLINE
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const char * tr_torrentName( const tr_torrent * tor )
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{
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assert( tr_isTorrent( tor ) );
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return tor->info.name;
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}
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/**
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* Tell the tr_torrent that one of its files has become complete
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*/
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void tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNo );
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/**
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* @brief Like tr_torrentFindFile(), but splits the filename into base and subpath;
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*
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* If the file is found, "tr_buildPath( base, subpath, NULL )"
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* will generate the complete filename.
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*
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* @return true if the file is found, false otherwise.
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*
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* @param base if the torrent is found, this will be either
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* tor->downloadDir or tor->incompleteDir
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* @param subpath on success, this pointer is assigned a newly-allocated
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* string holding the second half of the filename.
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*/
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tr_bool tr_torrentFindFile2( const tr_torrent *, tr_file_index_t fileNo,
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const char ** base, char ** subpath );
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/* Returns a newly-allocated version of the tr_file.name string
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* that's been modified to denote that it's not a complete file yet.
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* In the current implementation this is done by appending ".part"
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* a la Firefox. */
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char* tr_torrentBuildPartial( const tr_torrent *, tr_file_index_t fileNo );
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/* for when the info dict has been fundamentally changed wrt files,
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* piece size, etc. such as in BEP 9 where peers exchange metadata */
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void tr_torrentGotNewInfoDict( tr_torrent * tor );
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#endif
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