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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef MSESTREAMSOCKET_H
#define MSESTREAMSOCKET_H
#include <qobject.h>
#include <util/constants.h>
#include <net/bufferedsocket.h>
class QString;
using bt::Uint8;
using bt::Uint16;
using bt::Uint32;
namespace bt
{
class SHA1Hash;
class Peer;
class AuthenticateBase;
}
namespace mse
{
class RC4Encryptor;
/**
* @author Joris Guisson <joris.guisson@gmail.com>
*
* Wrapper around a TCP socket which handles RC4 encryption.
* Once authentication is done, the sendData and readData interfaces should
* not be used anymore, a SocketReader and SocketWriter should be provided,
* so that reading and writing is controlled from the monitor thread.
*/
class StreamSocket : public QObject,public net::SocketReader,public net::SocketWriter
{
Q_OBJECT
public:
StreamSocket();
StreamSocket(int fd);
virtual ~StreamSocket();
/**
* Send a chunk of data. (Does not encrypt the data)
* @param data The data
* @param len The length
* @return Number of bytes written
*/
Uint32 sendData(const Uint8* data,Uint32 len);
/**
* Reads data from the peer.
* @param buf The buffer to store the data
* @param len The maximum number of bytes to read
* @return The number of bytes read
*/
Uint32 readData(Uint8* buf,Uint32 len);
/// Get the number of bytes available to read.
Uint32 bytesAvailable() const;
/// Are we using encryption
bool encrypted() const {return enc != 0;}
/**
* Initialize the RC4 encryption algorithm.
* @param dkey
* @param ekey
*/
void initCrypt(const bt::SHA1Hash & dkey,const bt::SHA1Hash & ekey);
/// Set the encryptor
void setRC4Encryptor(RC4Encryptor* enc);
/// Disables encryption. All data will be sent over as plain text.
void disableCrypt();
/// Close the socket
void close();
/// Connect the socket to a remote host
bool connectTo(const QString & ip,Uint16 port);
/// Get the IP address of the remote peer
QString getRemoteIPAddress() const;
/// Get the port of the remote peer
bt::Uint16 getRemotePort() const;
/// Get the full address
net::Address getRemoteAddress() const;
/**
* Reinsert data, this is needed when we read to much during the crypto handshake.
* This data will be the first to read out. The data will be copied to a temporary buffer
* which will be destroyed when the reinserted data has been read.
*/
void reinsert(const Uint8* d,Uint32 size);
/// see if the socket is still OK
bool ok() const;
/// Get the file descriptor
int fd() const {return sock->fd();}
/// Start monitoring of this socket by the monitor thread
void startMonitoring(net::SocketReader* rdr,net::SocketWriter* wrt);
/// Is this socket connecting to a remote host
bool connecting() const;
/// See if a connect was success full
bool connectSuccesFull() const;
/// Get the current download rate
float getDownloadRate() const;
/// Get the current download rate
float getUploadRate() const;
/**
* Set the TOS byte for new sockets.
* @param t TOS value
*/
static void setTOS(Uint8 t) {tos = t;}
/**
* Set the download and upload group ID's
* @param up Upload group ID
* @param down Download group ID
*/
void setGroupIDs(Uint32 up,Uint32 down);
/**
* Check if we are allowed to initiate another outgoing connection.
*/
static bool canInitiateNewConnection() {return num_connecting < max_connecting;}
/**
* Set the maximum number of connecting sockets we are allowed to have.
*/
static void setMaxConnecting(Uint32 mc) {max_connecting = mc;}
private:
virtual void onDataReady(Uint8* buf,Uint32 size);
virtual Uint32 onReadyToWrite(Uint8* data,Uint32 max_to_write);
virtual bool hasBytesToWrite() const;
private:
net::BufferedSocket* sock;
RC4Encryptor* enc;
Uint8* reinserted_data;
Uint32 reinserted_data_size;
Uint32 reinserted_data_read;
bool monitored;
net::SocketReader* rdr;
net::SocketWriter* wrt;
static Uint8 tos;
static Uint32 num_connecting; // the number of connections we have in SYN_SENT state
static Uint32 max_connecting;
};
}
#endif
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