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/* <!-- copyright */
/*
* aria2 - a simple utility for downloading files faster
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* copyright --> */
#ifndef _D_PEER_CONNECTION_H_
#define _D_PEER_CONNECTION_H_
#include "Option.h"
#include "Socket.h"
#include "Logger.h"
#include "TorrentMan.h"
#include "PeerMessage.h"
#include "HandshakeMessage.h"
// we assume maximum length of incoming message is "piece" message with 16KB
// data. Messages beyond that size are dropped.
#define MAX_PAYLOAD_LEN (9+16*1024)
class PeerConnection {
private:
int cuid;
const Socket* socket;
const Option* option;
const Logger* logger;
Peer* peer;
TorrentMan* torrentMan;
char resbuf[MAX_PAYLOAD_LEN];
int resbufLength;
int currentPayloadLength;
char lenbuf[4];
int lenbufLength;
void createNLengthMessage(char* msg, int msgLen, int payloadLen, int id) const;
void setIntParam(char* dest, int param) const;
void writeOutgoingMessageLog(const char* msg) const;
void writeOutgoingMessageLog(const char* msg, int index) const;
void writeOutgoingMessageLog(const char* msg, const unsigned char* bitfield, int bitfieldLength) const;
void writeOutgoingMessageLog(const char* msg, int index, int begin, int length) const;
public:
PeerConnection(int cuid, const Socket* socket, const Option* op,
Peer* peer, TorrentMan* torrenMan);
~PeerConnection();
void sendHandshake() const;
void sendKeepAlive() const;
void sendChoke() const;
void sendUnchoke() const;
void sendInterested() const;
void sendNotInterested() const;
void sendHave(int index) const;
void sendBitfield() const;
void sendRequest(int index, int begin, int length) const;
void sendPiece(int index, int begin, int length) const;
void sendPieceHeader(int index, int begin, int length) const;
int sendPieceData(long long int offset, int length) const;
void sendCancel(int index, int begin, int length) const;
PeerMessage* receiveMessage();
HandshakeMessage* receiveHandshake();
Peer* getPeer() const { return peer; }
};
#endif // _D_PEER_CONNECTION_H_
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