transmission/libtransmission/peer-mgr.h

260 lines
7.6 KiB
C

/*
* This file Copyright (C) Mnemosyne LLC
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#ifndef __TRANSMISSION__
#error only libtransmission should #include this header.
#endif
#ifndef TR_PEER_MGR_H
#define TR_PEER_MGR_H
#include <inttypes.h> /* uint16_t */
#ifdef WIN32
#include <winsock2.h> /* struct in_addr */
#endif
#include "bitfield.h"
#include "history.h"
#include "net.h" /* tr_address */
#include "peer-common.h" /* struct peer_request */
/**
* @addtogroup peers Peers
* @{
*/
struct UTPSocket;
struct tr_peer_stat;
struct tr_torrent;
typedef struct tr_peerMgr tr_peerMgr;
/* added_f's bitwise-or'ed flags */
enum
{
/* true if the peer supports encryption */
ADDED_F_ENCRYPTION_FLAG = 1,
/* true if the peer is a seed or partial seed */
ADDED_F_SEED_FLAG = 2,
/* true if the peer supports uTP */
ADDED_F_UTP_FLAGS = 4,
/* true if the peer has holepunch support */
ADDED_F_HOLEPUNCH = 8,
/* true if the peer telling us about this peer
* initiated the connection (implying that it is connectible) */
ADDED_F_CONNECTABLE = 16
};
typedef struct tr_pex
{
tr_address addr;
tr_port port; /* this field is in network byte order */
uint8_t flags;
}
tr_pex;
struct tr_peerIo;
struct tr_peermsgs;
enum
{
ENCRYPTION_PREFERENCE_UNKNOWN,
ENCRYPTION_PREFERENCE_YES,
ENCRYPTION_PREFERENCE_NO
};
/* opaque forward declaration */
struct peer_atom;
/**
* State information about a connected peer.
*
* @see struct peer_atom
* @see tr_peermsgs
*/
typedef struct tr_peer
{
bool peerIsChoked;
bool peerIsInterested;
bool clientIsChoked;
bool clientIsInterested;
bool doPurge;
/* number of bad pieces they've contributed to */
uint8_t strikes;
uint8_t encryption_preference;
tr_port dht_port;
/* how many requests the peer has made that we haven't responded to yet */
int pendingReqsToClient;
/* how many requests we've made and are currently awaiting a response for */
int pendingReqsToPeer;
struct tr_peerIo * io;
struct peer_atom * atom;
struct tr_bitfield blame;
struct tr_bitfield have;
/** how complete the peer's copy of the torrent is. [0.0...1.0] */
float progress;
/* the client name from the `v' string in LTEP's handshake dictionary */
char * client;
time_t chokeChangedAt;
tr_recentHistory blocksSentToClient;
tr_recentHistory blocksSentToPeer;
tr_recentHistory cancelsSentToClient;
tr_recentHistory cancelsSentToPeer;
struct tr_peermsgs * msgs;
}
tr_peer;
void tr_peerConstruct( struct tr_peer * peer );
void tr_peerDestruct( tr_torrent * tor, struct tr_peer * peer );
static inline bool
tr_isPex( const tr_pex * pex )
{
return pex && tr_address_is_valid( &pex->addr );
}
const tr_address * tr_peerAddress( const tr_peer * );
int tr_pexCompare( const void * a, const void * b );
tr_peerMgr* tr_peerMgrNew( tr_session * );
void tr_peerMgrFree( tr_peerMgr * manager );
bool tr_peerMgrPeerIsSeed( const tr_torrent * tor,
const tr_address * addr );
void tr_peerMgrSetUtpSupported( tr_torrent * tor,
const tr_address * addr );
void tr_peerMgrSetUtpFailed( tr_torrent *tor,
const tr_address *addr,
bool failed );
void tr_peerMgrGetNextRequests( tr_torrent * torrent,
tr_peer * peer,
int numwant,
tr_block_index_t * setme,
int * numgot,
bool get_intervals );
bool tr_peerMgrDidPeerRequest( const tr_torrent * torrent,
const tr_peer * peer,
tr_block_index_t block );
void tr_peerMgrRebuildRequests( tr_torrent * torrent );
void tr_peerMgrAddIncoming( tr_peerMgr * manager,
tr_address * addr,
tr_port port,
int socket,
struct UTPSocket *utp_socket );
tr_pex * tr_peerMgrCompactToPex( const void * compact,
size_t compactLen,
const uint8_t * added_f,
size_t added_f_len,
size_t * setme_pex_count );
tr_pex * tr_peerMgrCompact6ToPex( const void * compact,
size_t compactLen,
const uint8_t * added_f,
size_t added_f_len,
size_t * pexCount );
tr_pex * tr_peerMgrArrayToPex( const void * array,
size_t arrayLen,
size_t * setme_pex_count );
/**
* @param seedProbability [0..100] for likelihood that the peer is a seed; -1 for unknown
*/
void tr_peerMgrAddPex( tr_torrent * tor,
uint8_t from,
const tr_pex * pex,
int8_t seedProbability );
void tr_peerMgrMarkAllAsSeeds( tr_torrent * tor );
enum
{
TR_PEERS_CONNECTED,
TR_PEERS_INTERESTING
};
int tr_peerMgrGetPeers( tr_torrent * tor,
tr_pex ** setme_pex,
uint8_t address_type,
uint8_t peer_list_mode,
int max_peer_count );
void tr_peerMgrStartTorrent( tr_torrent * tor );
void tr_peerMgrStopTorrent( tr_torrent * tor );
void tr_peerMgrAddTorrent( tr_peerMgr * manager,
struct tr_torrent * tor );
void tr_peerMgrRemoveTorrent( tr_torrent * tor );
void tr_peerMgrTorrentAvailability( const tr_torrent * tor,
int8_t * tab,
unsigned int tabCount );
uint64_t tr_peerMgrGetDesiredAvailable( const tr_torrent * tor );
void tr_peerMgrOnTorrentGotMetainfo( tr_torrent * tor );
void tr_peerMgrOnBlocklistChanged( tr_peerMgr * manager );
void tr_peerMgrTorrentStats( tr_torrent * tor,
int * setmePeersConnected,
int * setmeWebseedsSendingToUs,
int * setmePeersSendingToUs,
int * setmePeersGettingFromUs,
int * setmePeersFrom ); /* TR_PEER_FROM__MAX */
struct tr_peer_stat* tr_peerMgrPeerStats( const tr_torrent * tor,
int * setmeCount );
double* tr_peerMgrWebSpeeds_KBps( const tr_torrent * tor );
unsigned int tr_peerGetPieceSpeed_Bps( const tr_peer * peer,
uint64_t now,
tr_direction direction );
void tr_peerMgrClearInterest( tr_torrent * tor );
/* @} */
#endif