mirror of
https://github.com/transmission/transmission
synced 2024-12-27 18:18:10 +00:00
404 lines
11 KiB
C
404 lines
11 KiB
C
/*
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* This file Copyright (C) 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_PEER_IO_H
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#define TR_PEER_IO_H
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/**
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***
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**/
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#include <assert.h>
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#include "transmission.h"
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#include "bandwidth.h"
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#include "net.h" /* tr_address */
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#include "utils.h" /* tr_time() */
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struct evbuffer;
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struct tr_bandwidth;
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struct tr_crypto;
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struct tr_datatype;
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struct tr_peerIo;
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/**
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* @addtogroup networked_io Networked IO
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* @{
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*/
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typedef enum
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{
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READ_NOW,
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READ_LATER,
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READ_ERR
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}
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ReadState;
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typedef enum
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{
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/* these match the values in MSE's crypto_select */
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PEER_ENCRYPTION_NONE = ( 1 << 0 ),
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PEER_ENCRYPTION_RC4 = ( 1 << 1 )
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}
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tr_encryption_type;
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typedef ReadState ( *tr_can_read_cb )( struct tr_peerIo * io,
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void * user_data,
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size_t * setme_piece_byte_count );
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typedef void ( *tr_did_write_cb )( struct tr_peerIo * io,
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size_t bytesWritten,
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int wasPieceData,
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void * userData );
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typedef void ( *tr_net_error_cb )( struct tr_peerIo * io,
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short what,
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void * userData );
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typedef struct tr_peerIo
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{
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bool isEncrypted;
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bool isIncoming;
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bool peerIdIsSet;
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bool extendedProtocolSupported;
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bool fastExtensionSupported;
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bool dhtSupported;
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bool utpSupported;
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tr_priority_t priority;
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short int pendingEvents;
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int magicNumber;
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tr_encryption_type encryption_type;
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bool isSeed;
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tr_port port;
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int socket;
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struct UTPSocket *utp_socket;
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int refCount;
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uint8_t peerId[SHA_DIGEST_LENGTH];
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time_t timeCreated;
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tr_session * session;
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tr_address addr;
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tr_can_read_cb canRead;
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tr_did_write_cb didWrite;
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tr_net_error_cb gotError;
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void * userData;
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struct tr_bandwidth bandwidth;
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struct tr_crypto * crypto;
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struct evbuffer * inbuf;
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struct evbuffer * outbuf;
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struct tr_datatype * outbuf_datatypes;
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struct event * event_read;
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struct event * event_write;
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}
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tr_peerIo;
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/**
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***
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**/
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tr_peerIo* tr_peerIoNewOutgoing( tr_session * session,
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struct tr_bandwidth * parent,
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const struct tr_address * addr,
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tr_port port,
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const uint8_t * torrentHash,
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bool isSeed,
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bool utp );
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tr_peerIo* tr_peerIoNewIncoming( tr_session * session,
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struct tr_bandwidth * parent,
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const struct tr_address * addr,
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tr_port port,
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int socket,
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struct UTPSocket * utp_socket );
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void tr_peerIoRefImpl ( const char * file,
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int line,
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tr_peerIo * io );
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#define tr_peerIoRef(io) tr_peerIoRefImpl( __FILE__, __LINE__, (io) );
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void tr_peerIoUnrefImpl ( const char * file,
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int line,
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tr_peerIo * io );
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#define tr_peerIoUnref(io) tr_peerIoUnrefImpl( __FILE__, __LINE__, (io) );
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#define PEER_IO_MAGIC_NUMBER 206745
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static inline bool
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tr_isPeerIo( const tr_peerIo * io )
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{
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return ( io != NULL )
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&& ( io->magicNumber == PEER_IO_MAGIC_NUMBER )
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&& ( io->refCount >= 0 )
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&& ( tr_isBandwidth( &io->bandwidth ) )
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&& ( tr_address_is_valid( &io->addr ) );
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}
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/**
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***
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**/
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static inline void tr_peerIoEnableFEXT( tr_peerIo * io, bool flag )
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{
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io->fastExtensionSupported = flag;
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}
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static inline bool tr_peerIoSupportsFEXT( const tr_peerIo * io )
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{
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return io->fastExtensionSupported;
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}
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static inline void tr_peerIoEnableLTEP( tr_peerIo * io, bool flag )
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{
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io->extendedProtocolSupported = flag;
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}
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static inline bool tr_peerIoSupportsLTEP( const tr_peerIo * io )
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{
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return io->extendedProtocolSupported;
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}
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static inline void tr_peerIoEnableDHT( tr_peerIo * io, bool flag )
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{
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io->dhtSupported = flag;
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}
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static inline bool tr_peerIoSupportsDHT( const tr_peerIo * io )
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{
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return io->dhtSupported;
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}
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static inline bool tr_peerIoSupportsUTP( const tr_peerIo * io )
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{
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return io->dhtSupported;
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}
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/**
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***
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**/
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static inline tr_session* tr_peerIoGetSession ( tr_peerIo * io )
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{
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assert( tr_isPeerIo( io ) );
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assert( io->session );
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return io->session;
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}
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const char* tr_peerIoAddrStr( const struct tr_address * addr,
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tr_port port );
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const char* tr_peerIoGetAddrStr( const tr_peerIo * io );
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const struct tr_address * tr_peerIoGetAddress( const tr_peerIo * io,
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tr_port * port );
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const uint8_t* tr_peerIoGetTorrentHash( tr_peerIo * io );
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int tr_peerIoHasTorrentHash( const tr_peerIo * io );
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void tr_peerIoSetTorrentHash( tr_peerIo * io,
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const uint8_t * hash );
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int tr_peerIoReconnect( tr_peerIo * io );
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static inline bool tr_peerIoIsIncoming( const tr_peerIo * io )
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{
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return io->isIncoming;
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}
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static inline int tr_peerIoGetAge( const tr_peerIo * io )
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{
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return tr_time() - io->timeCreated;
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}
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/**
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***
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**/
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void tr_peerIoSetPeersId( tr_peerIo * io,
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const uint8_t * peer_id );
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static inline const uint8_t* tr_peerIoGetPeersId( const tr_peerIo * io )
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{
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assert( tr_isPeerIo( io ) );
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assert( io->peerIdIsSet );
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return io->peerId;
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}
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/**
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***
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**/
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void tr_peerIoSetIOFuncs ( tr_peerIo * io,
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tr_can_read_cb readcb,
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tr_did_write_cb writecb,
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tr_net_error_cb errcb,
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void * user_data );
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void tr_peerIoClear ( tr_peerIo * io );
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/**
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***
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**/
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void tr_peerIoWriteBytes ( tr_peerIo * io,
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const void * writeme,
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size_t writemeLen,
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bool isPieceData );
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void tr_peerIoWriteBuf ( tr_peerIo * io,
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struct evbuffer * buf,
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bool isPieceData );
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/**
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***
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**/
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static inline struct tr_crypto * tr_peerIoGetCrypto( tr_peerIo * io )
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{
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return io->crypto;
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}
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void tr_peerIoSetEncryption( tr_peerIo * io, tr_encryption_type encryption_type );
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static inline bool
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tr_peerIoIsEncrypted( const tr_peerIo * io )
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{
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return ( io != NULL ) && ( io->encryption_type == PEER_ENCRYPTION_RC4 );
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}
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void evbuffer_add_uint8 ( struct evbuffer * outbuf, uint8_t byte );
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void evbuffer_add_uint16( struct evbuffer * outbuf, uint16_t hs );
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void evbuffer_add_uint32( struct evbuffer * outbuf, uint32_t hl );
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void evbuffer_add_uint64( struct evbuffer * outbuf, uint64_t hll );
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static inline void
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evbuffer_add_hton_16( struct evbuffer * buf, uint16_t val )
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{
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evbuffer_add_uint16( buf, val );
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}
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static inline void
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evbuffer_add_hton_32( struct evbuffer * buf, uint32_t val )
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{
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evbuffer_add_uint32( buf, val );
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}
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static inline void
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evbuffer_add_hton_64( struct evbuffer * buf, uint64_t val )
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{
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evbuffer_add_uint64( buf, val );
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}
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void tr_peerIoReadBytesToBuf( tr_peerIo * io,
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struct evbuffer * inbuf,
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struct evbuffer * outbuf,
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size_t byteCount );
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void tr_peerIoReadBytes( tr_peerIo * io,
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struct evbuffer * inbuf,
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void * bytes,
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size_t byteCount );
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static inline void tr_peerIoReadUint8( tr_peerIo * io,
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struct evbuffer * inbuf,
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uint8_t * setme )
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{
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tr_peerIoReadBytes( io, inbuf, setme, sizeof( uint8_t ) );
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}
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void tr_peerIoReadUint16( tr_peerIo * io,
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struct evbuffer * inbuf,
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uint16_t * setme );
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void tr_peerIoReadUint32( tr_peerIo * io,
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struct evbuffer * inbuf,
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uint32_t * setme );
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void tr_peerIoDrain( tr_peerIo * io,
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struct evbuffer * inbuf,
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size_t byteCount );
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/**
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***
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**/
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size_t tr_peerIoGetWriteBufferSpace( const tr_peerIo * io, uint64_t now );
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static inline void tr_peerIoSetParent( tr_peerIo * io,
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struct tr_bandwidth * parent )
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{
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assert( tr_isPeerIo( io ) );
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tr_bandwidthSetParent( &io->bandwidth, parent );
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}
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void tr_peerIoBandwidthUsed( tr_peerIo * io,
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tr_direction direction,
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size_t byteCount,
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int isPieceData );
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static inline bool
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tr_peerIoHasBandwidthLeft( const tr_peerIo * io, tr_direction dir )
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{
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return tr_bandwidthClamp( &io->bandwidth, dir, 1024 ) > 0;
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}
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static inline unsigned int
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tr_peerIoGetPieceSpeed_Bps( const tr_peerIo * io, uint64_t now, tr_direction dir )
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{
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return tr_bandwidthGetPieceSpeed_Bps( &io->bandwidth, now, dir );
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}
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/**
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***
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**/
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void tr_peerIoSetEnabled( tr_peerIo * io,
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tr_direction dir,
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bool isEnabled );
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int tr_peerIoFlush( tr_peerIo * io,
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tr_direction dir,
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size_t byteLimit );
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int tr_peerIoFlushOutgoingProtocolMsgs( tr_peerIo * io );
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/**
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***
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**/
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static inline struct evbuffer * tr_peerIoGetReadBuffer( tr_peerIo * io )
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{
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return io->inbuf;
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}
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/* @} */
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#endif
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