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transmission/libtransmission/peer-io.h

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/*
* This file Copyright (C) 2007-2009 Charles Kerr <charles@transmissionbt.com>
*
* 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_IO_H
#define TR_PEER_IO_H
/**
***
**/
#include <assert.h>
#include <event.h>
#include "transmission.h"
#include "bandwidth.h"
#include "list.h" /* __tr_list */
#include "net.h" /* tr_address */
struct evbuffer;
struct tr_bandwidth;
struct tr_crypto;
struct tr_peerIo;
typedef enum
{
READ_NOW,
READ_LATER,
READ_ERR
}
ReadState;
typedef ReadState ( *tr_can_read_cb )( struct tr_peerIo * io,
void * user_data,
size_t * setme_piece_byte_count );
typedef void ( *tr_did_write_cb )( struct tr_peerIo * io,
size_t bytesWritten,
int wasPieceData,
void * userData );
typedef void ( *tr_net_error_cb )( struct tr_peerIo * io,
short what,
void * userData );
typedef struct tr_peerIo
{
tr_bool isEncrypted;
tr_bool isIncoming;
tr_bool peerIdIsSet;
tr_bool extendedProtocolSupported;
tr_bool fastExtensionSupported;
/* we create the socket in a nonblocking way, so this flag is initially
* false and then set to true when libevent says that the socket is ready
* for reading or writing */
tr_bool hasFinishedConnecting;
tr_priority_t priority;
int pendingEvents;
int magicNumber;
uint8_t encryptionMode;
tr_port port;
int socket;
int refCount;
uint8_t peerId[SHA_DIGEST_LENGTH];
time_t timeCreated;
tr_session * session;
tr_address addr;
tr_can_read_cb canRead;
tr_did_write_cb didWrite;
tr_net_error_cb gotError;
void * userData;
struct tr_bandwidth bandwidth;
struct tr_crypto * crypto;
struct evbuffer * inbuf;
struct evbuffer * outbuf;
struct __tr_list outbuf_datatypes; /* struct tr_datatype */
struct event event_read;
struct event event_write;
}
tr_peerIo;
/**
***
**/
tr_peerIo* tr_peerIoNewOutgoing( tr_session * session,
struct tr_bandwidth * parent,
const struct tr_address * addr,
tr_port port,
const uint8_t * torrentHash );
tr_peerIo* tr_peerIoNewIncoming( tr_session * session,
struct tr_bandwidth * parent,
const struct tr_address * addr,
tr_port port,
int socket );
void tr_peerIoRefImpl ( const char * file,
int line,
tr_peerIo * io );
#define tr_peerIoRef(io) tr_peerIoRefImpl( __FILE__, __LINE__, (io) );
void tr_peerIoUnrefImpl ( const char * file,
int line,
tr_peerIo * io );
#define tr_peerIoUnref(io) tr_peerIoUnrefImpl( __FILE__, __LINE__, (io) );
tr_bool tr_isPeerIo ( const tr_peerIo * io );
/**
***
**/
void tr_peerIoEnableLTEP( tr_peerIo * io, tr_bool flag );
static TR_INLINE tr_bool tr_peerIoSupportsLTEP( const tr_peerIo * io )
{
assert( tr_isPeerIo( io ) );
return io->extendedProtocolSupported;
}
void tr_peerIoEnableFEXT( tr_peerIo * io, tr_bool flag );
static TR_INLINE tr_bool tr_peerIoSupportsFEXT( const tr_peerIo * io )
{
assert( tr_isPeerIo( io ) );
return io->fastExtensionSupported;
}
/**
***
**/
static TR_INLINE tr_session* tr_peerIoGetSession ( tr_peerIo * io )
{
assert( tr_isPeerIo( io ) );
assert( io->session );
return io->session;
}
const char* tr_peerIoAddrStr( const struct tr_address * addr,
tr_port port );
static TR_INLINE const char* tr_peerIoGetAddrStr( const tr_peerIo * io )
{
return tr_isPeerIo( io ) ? tr_peerIoAddrStr( &io->addr, io->port ) : "error";
}
const struct tr_address * tr_peerIoGetAddress( const tr_peerIo * io,
tr_port * port );
const uint8_t* tr_peerIoGetTorrentHash( tr_peerIo * io );
int tr_peerIoHasTorrentHash( const tr_peerIo * io );
void tr_peerIoSetTorrentHash( tr_peerIo * io,
const uint8_t * hash );
int tr_peerIoReconnect( tr_peerIo * io );
static TR_INLINE tr_bool tr_peerIoIsIncoming( const tr_peerIo * io )
{
return io->isIncoming;
}
static TR_INLINE int tr_peerIoGetAge( const tr_peerIo * io )
{
return time( NULL ) - io->timeCreated;
}
/**
***
**/
void tr_peerIoSetPeersId( tr_peerIo * io,
const uint8_t * peer_id );
static TR_INLINE const uint8_t* tr_peerIoGetPeersId( const tr_peerIo * io )
{
assert( tr_isPeerIo( io ) );
assert( io->peerIdIsSet );
return io->peerId;
}
/**
***
**/
void tr_peerIoSetIOFuncs ( tr_peerIo * io,
tr_can_read_cb readcb,
tr_did_write_cb writecb,
tr_net_error_cb errcb,
void * user_data );
void tr_peerIoClear ( tr_peerIo * io );
/**
***
**/
void tr_peerIoWrite ( tr_peerIo * io,
const void * writeme,
size_t writemeLen,
tr_bool isPieceData );
void tr_peerIoWriteBuf ( tr_peerIo * io,
struct evbuffer * buf,
tr_bool isPieceData );
/**
***
**/
static TR_INLINE struct tr_crypto * tr_peerIoGetCrypto( tr_peerIo * io )
{
return io->crypto;
}
typedef enum
{
/* these match the values in MSE's crypto_select */
PEER_ENCRYPTION_NONE = ( 1 << 0 ),
PEER_ENCRYPTION_RC4 = ( 1 << 1 )
}
EncryptionMode;
void tr_peerIoSetEncryption( tr_peerIo * io,
int encryptionMode );
static TR_INLINE tr_bool tr_peerIoIsEncrypted( const tr_peerIo * io )
{
return ( io != NULL ) && ( io->encryptionMode == PEER_ENCRYPTION_RC4 );
}
static TR_INLINE void tr_peerIoWriteBytes( tr_peerIo * io UNUSED,
struct evbuffer * outbuf,
const void * bytes,
size_t byteCount )
{
evbuffer_add( outbuf, bytes, byteCount );
}
static TR_INLINE void tr_peerIoWriteUint8( tr_peerIo * io,
struct evbuffer * outbuf,
uint8_t writeme )
{
tr_peerIoWriteBytes( io, outbuf, &writeme, sizeof( uint8_t ) );
}
static TR_INLINE void tr_peerIoWriteUint16( tr_peerIo * io,
struct evbuffer * outbuf,
uint16_t writeme )
{
const uint16_t tmp = htons( writeme );
tr_peerIoWriteBytes( io, outbuf, &tmp, sizeof( uint16_t ) );
}
static TR_INLINE void tr_peerIoWriteUint32( tr_peerIo * io,
struct evbuffer * outbuf,
uint32_t writeme )
{
const uint32_t tmp = htonl( writeme );
tr_peerIoWriteBytes( io, outbuf, &tmp, sizeof( uint32_t ) );
}
void tr_peerIoReadBytes( tr_peerIo * io,
struct evbuffer * inbuf,
void * bytes,
size_t byteCount );
static TR_INLINE void tr_peerIoReadUint8( tr_peerIo * io,
struct evbuffer * inbuf,
uint8_t * setme )
{
tr_peerIoReadBytes( io, inbuf, setme, sizeof( uint8_t ) );
}
static TR_INLINE void tr_peerIoReadUint16( tr_peerIo * io,
struct evbuffer * inbuf,
uint16_t * setme )
{
uint16_t tmp;
tr_peerIoReadBytes( io, inbuf, &tmp, sizeof( uint16_t ) );
*setme = ntohs( tmp );
}
static TR_INLINE void tr_peerIoReadUint32( tr_peerIo * io,
struct evbuffer * inbuf,
uint32_t * setme )
{
uint32_t tmp;
tr_peerIoReadBytes( io, inbuf, &tmp, sizeof( uint32_t ) );
*setme = ntohl( tmp );
}
void tr_peerIoDrain( tr_peerIo * io,
struct evbuffer * inbuf,
size_t byteCount );
/**
***
**/
size_t tr_peerIoGetWriteBufferSpace( const tr_peerIo * io, uint64_t now );
static TR_INLINE void tr_peerIoSetParent( tr_peerIo * io,
struct tr_bandwidth * parent )
{
assert( tr_isPeerIo( io ) );
tr_bandwidthSetParent( &io->bandwidth, parent );
}
void tr_peerIoBandwidthUsed( tr_peerIo * io,
tr_direction direction,
size_t byteCount,
int isPieceData );
static TR_INLINE tr_bool tr_peerIoHasBandwidthLeft( const tr_peerIo * io,
tr_direction dir )
{
assert( tr_isPeerIo( io ) );
return !io->hasFinishedConnecting
|| ( tr_bandwidthClamp( &io->bandwidth, dir, 1024 ) > 0 );
}
static TR_INLINE double tr_peerIoGetPieceSpeed( const tr_peerIo * io, uint64_t now, tr_direction dir )
{
assert( tr_isPeerIo( io ) );
assert( tr_isDirection( dir ) );
return tr_bandwidthGetPieceSpeed( &io->bandwidth, now, dir );
}
/**
***
**/
void tr_peerIoSetEnabled( tr_peerIo * io,
tr_direction dir,
tr_bool isEnabled );
int tr_peerIoFlush( tr_peerIo * io,
tr_direction dir,
size_t byteLimit );
int tr_peerIoFlushOutgoingProtocolMsgs( tr_peerIo * io );
/**
***
**/
static TR_INLINE struct evbuffer * tr_peerIoGetReadBuffer( tr_peerIo * io )
{
return io->inbuf;
}
#endif
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