415 lines
12 KiB
C
415 lines
12 KiB
C
/*
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* This file Copyright (C) 2007-2010 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 <event.h>
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#include "transmission.h"
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#include "bandwidth.h"
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#include "list.h" /* tr_list */
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#include "net.h" /* tr_address */
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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_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 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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tr_bool isEncrypted;
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tr_bool isIncoming;
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tr_bool peerIdIsSet;
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tr_bool extendedProtocolSupported;
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tr_bool fastExtensionSupported;
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tr_bool dhtSupported;
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/* we create the socket in a nonblocking way, so this flag is initially
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* false and then set to true when libevent says that the socket is ready
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* for reading or writing */
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tr_bool hasFinishedConnecting;
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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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uint32_t encryptionMode;
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tr_bool isSeed;
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tr_port port;
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int 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_list * outbuf_datatypes; /* struct tr_datatype */
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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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tr_bool isSeed );
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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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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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tr_bool tr_isPeerIo ( const tr_peerIo * io );
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/**
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***
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**/
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static inline void tr_peerIoEnableFEXT( tr_peerIo * io, tr_bool flag )
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{
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io->fastExtensionSupported = flag;
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}
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static inline tr_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, tr_bool flag )
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{
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io->extendedProtocolSupported = flag;
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}
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static inline tr_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, tr_bool flag )
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{
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io->dhtSupported = flag;
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}
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static inline tr_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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/**
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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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static inline const char* tr_peerIoGetAddrStr( const tr_peerIo * io )
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{
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return tr_isPeerIo( io ) ? tr_peerIoAddrStr( &io->addr, io->port ) : "error";
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}
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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 tr_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 time( NULL ) - 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_peerIoWrite ( tr_peerIo * io,
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const void * writeme,
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size_t writemeLen,
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tr_bool isPieceData );
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void tr_peerIoWriteBuf ( tr_peerIo * io,
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struct evbuffer * buf,
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tr_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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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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EncryptionMode;
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void tr_peerIoSetEncryption( tr_peerIo * io, uint32_t encryptionMode );
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static inline tr_bool
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tr_peerIoIsEncrypted( const tr_peerIo * io )
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{
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return ( io != NULL ) && ( io->encryptionMode == PEER_ENCRYPTION_RC4 );
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}
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static inline void tr_peerIoWriteBytes( tr_peerIo * io UNUSED,
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struct evbuffer * outbuf,
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const void * bytes,
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size_t byteCount )
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{
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evbuffer_add( outbuf, bytes, byteCount );
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}
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static inline void tr_peerIoWriteUint8( tr_peerIo * io,
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struct evbuffer * outbuf,
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uint8_t writeme )
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{
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tr_peerIoWriteBytes( io, outbuf, &writeme, sizeof( uint8_t ) );
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}
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static inline void tr_peerIoWriteUint16( tr_peerIo * io,
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struct evbuffer * outbuf,
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uint16_t writeme )
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{
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const uint16_t tmp = htons( writeme );
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tr_peerIoWriteBytes( io, outbuf, &tmp, sizeof( uint16_t ) );
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}
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static inline void tr_peerIoWriteUint32( tr_peerIo * io,
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struct evbuffer * outbuf,
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uint32_t writeme )
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{
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const uint32_t tmp = htonl( writeme );
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tr_peerIoWriteBytes( io, outbuf, &tmp, sizeof( uint32_t ) );
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}
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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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static inline void tr_peerIoReadUint16( tr_peerIo * io,
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struct evbuffer * inbuf,
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uint16_t * setme )
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{
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uint16_t tmp;
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tr_peerIoReadBytes( io, inbuf, &tmp, sizeof( uint16_t ) );
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*setme = ntohs( tmp );
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}
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static inline void tr_peerIoReadUint32( tr_peerIo * io,
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struct evbuffer * inbuf,
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uint32_t * setme )
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{
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uint32_t tmp;
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tr_peerIoReadBytes( io, inbuf, &tmp, sizeof( uint32_t ) );
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*setme = ntohl( tmp );
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}
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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 tr_bool
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tr_peerIoHasBandwidthLeft( const tr_peerIo * io, tr_direction dir )
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{
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assert( tr_isPeerIo( io ) );
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return !io->hasFinishedConnecting
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|| ( 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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assert( tr_isPeerIo( io ) );
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assert( tr_isDirection( dir ) );
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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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tr_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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