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transmission/libtransmission/transmission.h

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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.
*****************************************************************************/
#ifndef TR_TRANSMISSION_H
#define TR_TRANSMISSION_H 1
#ifdef __cplusplus
extern "C" {
#endif
#include "version.h"
#include <inttypes.h> /* uintN_t */
#ifndef PRId64
# define PRId64 "lld"
#endif
#ifndef PRIu64
# define PRIu64 "llu"
#endif
#include <time.h> /* time_t */
#define SHA_DIGEST_LENGTH 20
#ifdef __BEOS__
# include <StorageDefs.h>
# define MAX_PATH_LENGTH B_FILE_NAME_LENGTH
#else
# define MAX_PATH_LENGTH 1024
#endif
#if defined(WIN32)
#define TR_PATH_DELIMITER '\\'
#define TR_PATH_DELIMITER_STR "\\"
#else
#define TR_PATH_DELIMITER '/'
#define TR_PATH_DELIMITER_STR "/"
#endif
#define TR_DEFAULT_PORT 51413
enum
{
TR_PEER_FROM_INCOMING = 0, /* connections made to the listening port */
TR_PEER_FROM_TRACKER = 1, /* peers received from a tracker */
TR_PEER_FROM_CACHE = 2, /* peers read from the peer cache */
TR_PEER_FROM_PEX = 3, /* peers discovered via PEX */
TR_PEER_FROM__MAX
};
/***********************************************************************
* tr_init
***********************************************************************
* Initializes and returns an opaque libtransmission handle
* to be passed to functions below. The tag argument is a short string
* unique to the program invoking tr_init(), it is currently used as
* part of saved torrent files' names to prevent one frontend from
* deleting a torrent used by another. The following tags are used:
* beos cli daemon gtk macosx wx
**********************************************************************/
typedef struct tr_handle tr_handle;
tr_handle * tr_initFull( const char * tag,
int isPexEnabled,
int isNatEnabled,
int publicPort,
int encryptionMode,
int isUploadLimitEnabled,
int uploadLimit,
int isDownloadLimitEnabled,
int downloadLimit,
int globalPeerLimit,
int messageLevel,
int isMessageQueueingEnabled );
/**
* Like tr_initFull() but with default values supplied.
*/
tr_handle * tr_init( const char * tag );
/**
* Shut down a libtransmission instance created by tr_init*()
*/
void tr_close( tr_handle * );
/**
***
**/
typedef struct tr_session_stats
{
uint64_t uploadedBytes; /* total up */
uint64_t downloadedBytes; /* total down */
double ratio; /* TR_RATIO_INF, TR_RATIO_NA, or total up/down */
uint64_t filesAdded; /* number of files added */
uint64_t sessionCount; /* program started N times */
uint64_t secondsActive; /* how long Transmisson's been running */
}
tr_session_stats;
/* stats from the current session. */
void tr_getSessionStats( const tr_handle * handle,
tr_session_stats * setme );
/* stats from the current and past sessions. */
void tr_getCumulativeSessionStats( const tr_handle * handle,
tr_session_stats * setme );
/**
***
**/
typedef enum
{
TR_PLAINTEXT_PREFERRED,
TR_ENCRYPTION_PREFERRED,
TR_ENCRYPTION_REQUIRED
}
tr_encryption_mode;
tr_encryption_mode tr_getEncryptionMode( tr_handle * handle );
void tr_setEncryptionMode( tr_handle * handle, tr_encryption_mode mode );
/***********************************************************************
* tr_getPrefsDirectory
***********************************************************************
* Returns the full path to a directory which can be used to store
* preferences. The string belongs to libtransmission, do not free it.
**********************************************************************/
const char * tr_getPrefsDirectory( void );
/***********************************************************************
** Message Logging
*/
#define TR_MSG_ERR 1
#define TR_MSG_INF 2
#define TR_MSG_DBG 3
void tr_setMessageLevel( int );
int tr_getMessageLevel( void );
void tr_setMessageQueuing( int enable );
typedef struct tr_msg_list tr_msg_list;
tr_msg_list * tr_getQueuedMessages( void );
void tr_freeMessageList( tr_msg_list * freeme );
/***********************************************************************
** Incoming Peer Connections Port
*/
void tr_setBindPort( tr_handle *, int );
void tr_natTraversalEnable( tr_handle *, int enable );
int tr_getPublicPort( const tr_handle * );
typedef enum
{
TR_NAT_TRAVERSAL_MAPPING,
TR_NAT_TRAVERSAL_MAPPED,
TR_NAT_TRAVERSAL_UNMAPPING,
TR_NAT_TRAVERSAL_UNMAPPED,
TR_NAT_TRAVERSAL_ERROR,
}
tr_nat_traversal_status;
typedef struct tr_handle_status
{
tr_nat_traversal_status natTraversalStatus;
int publicPort;
}
tr_handle_status;
const tr_handle_status * tr_handleStatus( tr_handle * );
/***********************************************************************
***
*** TORRENTS
**/
typedef struct tr_torrent tr_torrent;
int tr_torrentCount( const tr_handle * h );
/***********************************************************************
*** Speed Limits
**/
enum { TR_UP, TR_DOWN };
typedef enum
{
TR_SPEEDLIMIT_GLOBAL, /* only follow the overall speed limit */
TR_SPEEDLIMIT_SINGLE, /* only follow the per-torrent limit */
TR_SPEEDLIMIT_UNLIMITED /* no limits at all */
}
tr_speedlimit;
void tr_torrentSetSpeedMode( tr_torrent * tor,
int up_or_down,
tr_speedlimit mode );
tr_speedlimit tr_torrentGetSpeedMode( const tr_torrent * tor,
int up_or_down);
void tr_torrentSetSpeedLimit( tr_torrent * tor,
int up_or_down,
int single_KiB_sec );
int tr_torrentGetSpeedLimit( const tr_torrent * tor,
int up_or_down );
void tr_setUseGlobalSpeedLimit( tr_handle * handle,
int up_or_down,
int use_flag );
void tr_setGlobalSpeedLimit( tr_handle * handle,
int up_or_down,
int global_KiB_sec );
void tr_getGlobalSpeedLimit( tr_handle * handle,
int up_or_down,
int * setme_is_enabled,
int * setme_KiBsec );
/***********************************************************************
*** Peer Limits
**/
void tr_torrentSetMaxConnectedPeers( tr_torrent * tor,
uint16_t maxConnectedPeers);
uint16_t tr_torrentGetMaxConnectedPeers( const tr_torrent * tor );
void tr_setGlobalPeerLimit( tr_handle * handle,
uint16_t maxGlobalPeers );
uint16_t tr_getGlobalPeerLimit( const tr_handle * handle );
/***********************************************************************
* Torrent Priorities
**********************************************************************/
enum
{
TR_PRI_LOW = -1,
TR_PRI_NORMAL = 0, /* since NORMAL is 0, memset initializes nicely */
TR_PRI_HIGH = 1
};
typedef int8_t tr_priority_t;
/* set a batch of files to a particular priority.
* priority must be one of TR_PRI_NORMAL, _HIGH, or _LOW */
void tr_torrentSetFilePriorities( tr_torrent * tor,
int * files,
int fileCount,
tr_priority_t priority );
/* returns a malloc()ed array of tor->info.fileCount items,
* each holding a value of TR_PRI_NORMAL, _HIGH, or _LOW.
free the array when done. */
tr_priority_t* tr_torrentGetFilePriorities( const tr_torrent * );
/* single-file form of tr_torrentGetFilePriorities.
* returns one of TR_PRI_NORMAL, _HIGH, or _LOW. */
tr_priority_t tr_torrentGetFilePriority( const tr_torrent *, int file );
/* returns true if the file's `download' flag is set */
int tr_torrentGetFileDL( const tr_torrent *, int file );
/* set a batch of files to be downloaded or not. */
void tr_torrentSetFileDLs ( tr_torrent * tor,
int * files,
int fileCount,
int do_download );
/***********************************************************************
* tr_torrentRates
***********************************************************************
* Gets the total download and upload rates
**********************************************************************/
void tr_torrentRates( tr_handle *, float *, float * );
/**
* Torrent Instantiation
*
* Instantiating a tr_torrent had gotten more complicated as features were
* added. At one point there were four functions to check metainfo and five
* to create tr_torrent.
*
* To remedy this, a Torrent Constructor (struct tr_ctor) has been introduced:
* + Simplifies the API down to two (non-deprecated) functions.
* + You can set the fields you want; the system sets defaults for the rest.
* + You can specify whether or not your fields should supercede fastresume's.
* + We can add new features to tr_ctor without breaking tr_torrentNew()'s API.
*
* All the tr_ctor{Get,Set}*() functions with a return value return
* an error number, or zero if no error occurred.
*
* You must call one of the SetMetainfo() functions before creating
* a torrent with a tr_ctor. The other functions are optional.
*
* You can reuse a single tr_ctor to create a batch of torrents --
* just call one of the SetMetainfo() functions between each
* tr_torrentNew() call.
*
* Every call to tr_ctorSetMetainfo*() frees the previous metainfo.
*/
typedef enum
{
TR_FALLBACK, /* indicates the ctor value should be used only
in case of missing fastresume settings */
TR_FORCE, /* indicates the ctor value should be used
regardless of what's in the fastresume settings */
}
tr_ctorMode;
typedef struct tr_ctor tr_ctor;
struct benc_val_s;
tr_ctor* tr_ctorNew ( const tr_handle * handle);
void tr_ctorFree ( tr_ctor * ctor );
void tr_ctorSetSave ( tr_ctor * ctor,
int saveMetadataInOurTorrentsDir );
int tr_ctorSetMetainfo ( tr_ctor * ctor,
const uint8_t * metainfo,
size_t len );
int tr_ctorSetMetainfoFromFile ( tr_ctor * ctor,
const char * filename );
int tr_ctorSetMetainfoFromHash ( tr_ctor * ctor,
const char * hashString );
void tr_ctorSetMaxConnectedPeers ( tr_ctor * ctor,
tr_ctorMode mode,
uint16_t maxConnectedPeers );
void tr_ctorSetDestination ( tr_ctor * ctor,
tr_ctorMode mode,
const char * directory );
void tr_ctorSetPaused ( tr_ctor * ctor,
tr_ctorMode mode,
uint8_t isPaused );
int tr_ctorGetMaxConnectedPeers ( const tr_ctor * ctor,
tr_ctorMode mode,
uint16_t * setmeCount );
int tr_ctorGetIsPaused ( const tr_ctor * ctor,
tr_ctorMode mode,
uint8_t * setmeIsPaused );
int tr_ctorGetDestination ( const tr_ctor * ctor,
tr_ctorMode mode,
const char ** setmeDestination );
int tr_ctorGetMetainfo ( const tr_ctor * ctor,
const struct benc_val_s ** setme );
int tr_ctorGetSave ( const tr_ctor * ctor );
typedef struct tr_info tr_info;
/**
* Parses the specified metainfo.
* Returns TR_OK if it parsed and can be added to Transmission.
* Returns TR_INVALID if it couldn't be parsed.
* Returns TR_EDUPLICATE if it parsed but can't be added.
* "destination" must be set to test for TR_EDUPLICATE.
*
* If "setme_info" is non-NULL, the parsed metainfo is stored there
* and will need to be freed by the caller via tr_metainfoFree().
*/
int tr_torrentParse( const tr_handle * handle,
const tr_ctor * ctor,
tr_info * setme_info_or_NULL );
/**
* Instantiate a single torrent.
*/
#define TR_EINVALID 1
#define TR_EUNSUPPORTED 2
#define TR_EDUPLICATE 3
#define TR_EOTHER 666
tr_torrent * tr_torrentNew( tr_handle * handle,
const tr_ctor * ctor,
int * setmeError );
/**
* Load all the torrents in tr_getTorrentsDirectory().
* This can be used at startup to kickstart all the torrents
* from the previous session.
*/
tr_torrent ** tr_loadTorrents ( tr_handle * h,
tr_ctor * ctor,
int * setmeCount );
/**
* Set whether or not torrents are allowed to do peer exchanges.
* PEX is always disabled in private torrents regardless of this.
* In public torrents, PEX is enabled by default.
*/
void tr_setPexEnabled( tr_handle *, int isEnabled );
int tr_isPexEnabled( const tr_handle * );
const tr_info * tr_torrentInfo( const tr_torrent * );
void tr_torrentSetFolder( tr_torrent *, const char * );
const char * tr_torrentGetFolder( const tr_torrent * );
void tr_torrentStart( tr_torrent * );
void tr_torrentStop( tr_torrent * );
/**
***
**/
typedef enum
{
TR_CP_INCOMPLETE, /* doesn't have all the desired pieces */
TR_CP_DONE, /* has all the pieces but the DND ones */
TR_CP_COMPLETE /* has every piece */
}
cp_status_t;
typedef void (tr_torrent_status_func)(tr_torrent * torrent,
cp_status_t status,
void * user_data );
/**
* Register to be notified whenever a torrent's state changes.
*
* func is invoked FROM LIBTRANSMISSION'S THREAD!
* This means func must be fast (to avoid blocking peers),
* shouldn't call libtransmission functions (to avoid deadlock),
* and shouldn't modify client-level memory without using a mutex!
*/
void tr_torrentSetStatusCallback( tr_torrent * torrent,
tr_torrent_status_func func,
void * user_data );
void tr_torrentClearStatusCallback( tr_torrent * torrent );
/**
***
**/
typedef void (tr_torrent_active_func)(tr_torrent * torrent,
int isRunning,
void * user_data );
/**
* Register to be notified whenever a torrent starts or stops.
*
* func is invoked FROM LIBTRANSMISSION'S THREAD!
* This means func must be fast (to avoid blocking peers),
* shouldn't call libtransmission functions (to avoid deadlock),
* and shouldn't modify client-level memory without using a mutex!
*/
void tr_torrentSetActiveCallback( tr_torrent * torrent,
tr_torrent_active_func func,
void * user_data );
void tr_torrentClearActiveCallback( tr_torrent * torrent );
/**
* MANUAL ANNOUNCE
*
* Trackers usually set an announce interval of 15 or 30 minutes.
* Users can send one-time announce requests that override this
* interval by calling tr_manualUpdate().
*
* The wait interval for tr_manualUpdate() is much smaller.
* You can test whether or not a manual update is possible
* (for example, to desensitize the button) by calling
* tr_torrentCanManualUpdate().
*/
void tr_manualUpdate( tr_torrent * );
int tr_torrentCanManualUpdate( const tr_torrent * );
/***********************************************************************
* tr_torrentStat
***********************************************************************
* Returns a pointer to an tr_stat structure with updated information
* on the torrent. The structure belongs to libtransmission (do not
* free it) and is guaranteed to be unchanged until the next call to
* tr_torrentStat.
* The interface should call this function every second or so in order
* to update itself.
**********************************************************************/
typedef struct tr_stat tr_stat;
const tr_stat * tr_torrentStat( tr_torrent * );
const tr_stat * tr_torrentStatCached( tr_torrent * );
/***********************************************************************
* tr_torrentPeers
***********************************************************************/
typedef struct tr_peer_stat tr_peer_stat;
tr_peer_stat * tr_torrentPeers( const tr_torrent *, int * peerCount );
void tr_torrentPeersFree( tr_peer_stat *, int peerCount );
typedef struct tr_file_stat tr_file_stat;
tr_file_stat * tr_torrentFiles( const tr_torrent *, int * fileCount );
void tr_torrentFilesFree( tr_file_stat *, int fileCount );
/***********************************************************************
* tr_torrentAvailability
***********************************************************************
* Use this to draw an advanced progress bar which is 'size' pixels
* wide. Fills 'tab' which you must have allocated: each byte is set
* to either -1 if we have the piece, otherwise it is set to the number
* of connected peers who have the piece.
**********************************************************************/
void tr_torrentAvailability( const tr_torrent *, int8_t * tab, int size );
void tr_torrentAmountFinished( const tr_torrent * tor, float * tab, int size );
/***********************************************************************
* tr_torrentRemoveSaved
***********************************************************************
* delete's Transmission's copy of the torrent's metadata from
* tr_getTorrentsDirectory().
**********************************************************************/
void tr_torrentRemoveSaved( tr_torrent * );
void tr_torrentRecheck( tr_torrent * );
/**
* Frees memory allocated by tr_torrentNew().
* Running torrents are stopped first.
*/
void tr_torrentClose( tr_torrent * );
/***********************************************************************
* tr_info
**********************************************************************/
typedef struct tr_file
{
uint64_t length; /* Length of the file, in bytes */
char name[MAX_PATH_LENGTH]; /* Path to the file */
int8_t priority; /* TR_PRI_HIGH, _NORMAL, or _LOW */
int8_t dnd; /* nonzero if the file shouldn't be downloaded */
int firstPiece; /* We need pieces [firstPiece... */
int lastPiece; /* ...lastPiece] to dl this file */
uint64_t offset; /* file begins at the torrent's nth byte */
}
tr_file;
typedef struct tr_piece
{
uint8_t hash[SHA_DIGEST_LENGTH]; /* pieces hash */
int8_t priority; /* TR_PRI_HIGH, _NORMAL, or _LOW */
int8_t dnd; /* nonzero if the piece shouldn't be downloaded */
}
tr_piece;
typedef struct tr_tracker_info
{
char * address;
int port;
char * announce;
char * scrape;
}
tr_tracker_info;
struct tr_info
{
/* Path to torrent */
char torrent[MAX_PATH_LENGTH];
/* General info */
uint8_t hash[SHA_DIGEST_LENGTH];
char hashString[2*SHA_DIGEST_LENGTH+1];
char name[MAX_PATH_LENGTH];
/* Flags */
unsigned int isPrivate : 1;
unsigned int isMultifile : 1;
/* Tracker info */
struct
{
tr_tracker_info * list;
int count;
} * trackerList;
int trackerTiers;
char * primaryAddress;
/* Torrent info */
char comment[MAX_PATH_LENGTH];
char creator[MAX_PATH_LENGTH];
int dateCreated;
/* Pieces info */
int pieceSize;
int pieceCount;
uint64_t totalSize;
tr_piece * pieces;
/* Files info */
int fileCount;
tr_file * files;
};
typedef enum
{
TR_STATUS_CHECK_WAIT = (1<<0), /* Waiting in queue to check files */
TR_STATUS_CHECK = (1<<1), /* Checking files */
TR_STATUS_DOWNLOAD = (1<<2), /* Downloading */
TR_STATUS_DONE = (1<<3), /* not at 100% so can't tell the tracker
we're a seeder, but due to DND files
there's nothing we want right now */
TR_STATUS_SEED = (1<<4), /* Seeding */
TR_STATUS_STOPPED = (1<<5) /* Torrent is stopped */
}
tr_torrent_status;
#define TR_STATUS_IS_ACTIVE(s) ((s) != TR_STATUS_STOPPED)
/**
* Transmission error codes
* errors are always negative, and 0 refers to no error.
*/
typedef enum tr_errno
{
TR_OK = 0,
/* general errors */
TR_ERROR = -100,
TR_ERROR_ASSERT,
/* io errors */
TR_ERROR_IO_PARENT = -200,
TR_ERROR_IO_PERMISSIONS,
TR_ERROR_IO_SPACE,
TR_ERROR_IO_FILE_TOO_BIG,
TR_ERROR_IO_OPEN_FILES,
TR_ERROR_IO_DUP_DOWNLOAD,
TR_ERROR_IO_OTHER,
/* tracker errors */
TR_ERROR_TC_ERROR = -300,
TR_ERROR_TC_WARNING
}
tr_errno;
#define TR_ERROR_IS_IO(e) (TR_ERROR_IO_PARENT<=(e) && (e)<=TR_ERROR_IO_OTHER)
#define TR_ERROR_IS_TC(e) (TR_ERROR_TC_ERROR<=(e) && (e)<=TR_ERROR_TC_WARNING)
struct tr_stat
{
tr_torrent_status status;
tr_errno error;
char errorString[128];
const tr_tracker_info * tracker;
float recheckProgress;
float percentComplete;
float percentDone;
float rateDownload;
float rateUpload;
int eta;
int peersKnown;
int peersConnected;
int peersFrom[TR_PEER_FROM__MAX];
int peersSendingToUs;
int peersGettingFromUs;
int seeders;
int leechers;
int completedFromTracker;
/* Byte count of how much data is left to be downloaded until
* we're done -- that is, until we've got all the pieces we wanted. */
uint64_t leftUntilDone;
/* Byte count of all the corrupt data you've ever downloaded for
* this torrent. If you're on a poisoned torrent, this number can
* grow very large. */
uint64_t corruptEver;
/* Byte count of all data you've ever uploaded for this torrent. */
uint64_t uploadedEver;
/* Byte count of all the non-corrupt data you've ever downloaded
* for this torrent. If you deleted the files and downloaded a second time,
* this will be 2*totalSize.. */
uint64_t downloadedEver;
/* Byte count of all the checksum-verified data we have for this torrent. */
uint64_t haveValid;
/* Byte count of all the partial piece data we have for this torrent.
* As pieces become complete, this value may decrease as portions of it are
* moved to `corrupt' or `haveValid'. */
uint64_t haveUnchecked;
/* Byte count of all the non-DND piece data that either we already have,
* or that a peer we're connected to has. [0...desiredSize] */
uint64_t desiredAvailable;
/* Byte count of all the piece data we want, whether we currently
* have it nor not. [0...tr_info.totalSize] */
uint64_t desiredSize;
float swarmspeed;
#define TR_RATIO_NA -1
#define TR_RATIO_INF -2
/* TR_RATIO_INF, TR_RATIO_NA, or a regular ratio */
float ratio;
uint64_t startDate;
uint64_t activityDate;
};
struct tr_file_stat
{
uint64_t bytesCompleted;
float progress;
};
struct tr_peer_stat
{
char addr[16];
char client[80];
unsigned int isEncrypted : 1;
unsigned int isDownloadingFrom : 1;
unsigned int isUploadingTo : 1;
unsigned int peerIsChoked : 1;
unsigned int peerIsInterested : 1;
unsigned int clientIsChoked : 1;
unsigned int clientIsInterested : 1;
unsigned int isIncoming : 1;
char flagStr[32];
uint8_t from;
uint16_t port;
float progress;
float downloadFromRate;
float uploadToRate;
};
struct tr_msg_list
{
uint8_t level;
time_t when;
char * message;
const char * file;
int line;
struct tr_msg_list * next;
};
#ifdef __TRANSMISSION__
# include "internal.h"
#endif
#ifdef __cplusplus
}
#endif
#endif
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