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124 lines
3.8 KiB
124 lines
3.8 KiB
/***************************************************************************
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* Copyright (C) 2005 by Joris Guisson *
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* joris.guisson@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#ifndef BTCHOKER_H
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#define BTCHOKER_H
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#include <tqptrlist.h>
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#include <util/constants.h>
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#include "peer.h"
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namespace kt
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{
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struct TorrentStats;
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}
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namespace bt
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{
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const Uint32 UNDEFINED_ID = 0xFFFFFFFF;
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class PeerManager;
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class ChunkManager;
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typedef int (*PeerCompareFunc)(Peer* a,Peer* b);
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class PeerPtrList : public TQPtrList<Peer>
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{
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PeerCompareFunc pcmp;
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public:
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PeerPtrList(PeerCompareFunc pcmp = NULL);
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virtual ~PeerPtrList();
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void setCompareFunc(PeerCompareFunc p) {pcmp = p;}
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virtual int compareItems(TQPtrCollection::Item a, TQPtrCollection::Item b);
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};
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/**
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* Base class for all choke algorithms.
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*/
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class ChokeAlgorithm
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{
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protected:
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Uint32 opt_unchoked_peer_id;
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public:
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ChokeAlgorithm();
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virtual ~ChokeAlgorithm();
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/**
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* Do the actual choking when we are still downloading.
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* @param pman The PeerManager
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* @param cman The ChunkManager
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* @param stats The torrent stats
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*/
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virtual void doChokingLeechingState(PeerManager & pman,ChunkManager & cman,const kt::TorrentStats & stats) = 0;
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/**
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* Do the actual choking when we are seeding
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* @param pman The PeerManager
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* @param cman The ChunkManager
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* @param stats The torrent stats
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*/
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virtual void doChokingSeedingState(PeerManager & pman,ChunkManager & cman,const kt::TorrentStats & stats) = 0;
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/// Get the optimisticly unchoked peer ID
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Uint32 getOptimisticlyUnchokedPeerID() const {return opt_unchoked_peer_id;}
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};
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/**
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* @author Joris Guisson
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* @brief Handles the choking
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*
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* This class handles the choking and unchoking of Peer's.
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* This class needs to be updated every 10 seconds.
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*/
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class Choker
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{
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ChokeAlgorithm* choke;
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PeerManager & pman;
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ChunkManager & cman;
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static Uint32 num_upload_slots;
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public:
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Choker(PeerManager & pman,ChunkManager & cman);
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virtual ~Choker();
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/**
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* Update which peers are choked or not.
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* @param have_all Indicates wether we have the entire file
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* @param stats Statistic of the torrent
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*/
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void update(bool have_all,const kt::TorrentStats & stats);
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/// Get the PeerID of the optimisticly unchoked peer.
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Uint32 getOptimisticlyUnchokedPeerID() const {return choke->getOptimisticlyUnchokedPeerID();}
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/// Set the number of upload slots
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static void setNumUploadSlots(Uint32 n) {num_upload_slots = n;}
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/// Get the number of upload slots
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static Uint32 getNumUploadSlots() {return num_upload_slots;}
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};
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}
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#endif
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