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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* ivasic@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 ANTIP2P_H
#define ANTIP2P_H
#include <util/mmapfile.h>
#include <util/constants.h>
#include <tqvaluelist.h>
#include <tqstring.h>
namespace kt
{
typedef struct
{
bt::Uint32 ip1;
bt::Uint32 ip2;
bt::Uint64 offset;
bt::Uint32 nrEntries;
} HeaderBlock;
struct IPBlock
{
bt::Uint32 ip1;
bt::Uint32 ip2;
bool operator < (const IPBlock & b) const;
};
/**
* @author Ivan Vasic <ivasic@gmail.com>
* @brief This class is used to manage anti-p2p filter list, so called level1.
*/
class AntiP2P
{
public:
AntiP2P();
~AntiP2P();
/**
* Checks if anti-p2p file is present. Used to check if we should use level1 list
**/
bool exists();
/**
* Creates and loads the header from antip2p filter file.
**/
void loadHeader();
/**
* Checks if specified IP is listed in filter file.
* @return TRUE if IP should be blocked, FALSE otherwise
* @param ip TQString representation of IP to be checked
**/
bool isBlockedIP(const TQString& ip);
/**
* Overloaded function. Uses Uint32 IP to be checked
**/
bool isBlockedIP(bt::Uint32& ip);
/**
* This function converts TQString IP to Uint32 format.
**/
static bt::Uint32 toUint32(const TQString& ip);
private:
bt::MMapFile* file;
TQValueList<HeaderBlock> blocks;
///Is AntiP2P header loaded
bool header_loaded;
/**
* Loads filter file
*/
void load();
/**
* Binary searches AntiP2P::blocks to find range where IP could be.
* @returns
* -1 if IP cannot be in the list
* -2 if IP is already found in blocks
* or index of HeaderBlock in AntiP2P::blocks which will be used for direct file search.
**/
int searchHeader(bt::Uint32& ip, int start, int end);
/**
* Binary searches AntiP2P::file to find IP.
* @returns TRUE if IP should be blocked FALSE otherwise
**/
bool searchFile(IPBlock* file_blocks, bt::Uint32& ip, int start, int end);
};
}
#endif
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