aria2/src/PeerInteractionCommand.h

/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#ifndef _D_PEER_INTERACTION_COMMAND_H_
#define _D_PEER_INTERACTION_COMMAND_H_

#include "PeerAbstractCommand.h"
#include "PeerConnection.h"
#include "PeerInteraction.h"
#include "TimeA2.h"

using namespace std;

#define MAX_PEER_CHOKING_INTERVAL (1*60)
#define KEEP_ALIVE_INTERVAL 120

class PeerInteractionCommand : public PeerAbstractCommand {
private:
  int sequence;
  PeerInteraction* peerInteraction;
 
  Time keepAliveCheckPoint;
  //Time chokeCheckPoint;
  Time freqCheckPoint;
  Time haveCheckTime;
  Time periodicExecPoint;
  int chokeUnchokeCount;
  int haveCount;
  int keepAliveCount;
  void receiveMessages();
  void detectMessageFlooding();
  void checkLongTimePeerChoking();
  void detectTimeoutAndDuplicateBlock();
  void decideChoking();
  void sendKeepAlive();
  void checkHave();
protected:
  bool executeInternal();
  bool prepareForRetry(int wait);
  bool prepareForNextPeer(int wait);
  void onAbort(Exception* ex);
public:
  PeerInteractionCommand(int cuid, const PeerHandle& peer,
			 TorrentDownloadEngine* e,
			 const BtContextHandle& btContext,
			 const SocketHandle& s, int sequence);

  ~PeerInteractionCommand();

  enum Seq {
    INITIATOR_SEND_HANDSHAKE,
    INITIATOR_WAIT_HANDSHAKE,
    RECEIVER_SEND_HANDSHAKE,
    RECEIVER_WAIT_HANDSHAKE,
    WIRED};
};

#endif // _D_PEER_INTERACTION_COMMAND_H_