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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_MESSAGE_UTIL_H_
#define _D_PEER_MESSAGE_UTIL_H_
#include "PeerConnection.h"
#define MAX_BLOCK_LENGTH (128*1024)
class PeerMessageUtil {
private:
PeerMessageUtil() {}
static PeerMessage* createBasicMessage(int id, const char* msg, int len);
static PeerMessage* createHaveMessage(int id, const char* msg, int len);
static PeerMessage* createBitfieldMessage(int id, const char* msg, int len);
static PeerMessage* createRequestCancelMessage(int id, const char* msg, int len);
static PeerMessage* createPieceMessage(int id, const char* msg, int len);
static int getId(const char* msg);
static int getIntParam(const char* msg, int offset);
static void checkIndex(const PeerMessage* message, int pieces);
static void checkBegin(const PeerMessage* message, int pieceLength);
static void checkLength(const PeerMessage* message);
static void checkPieceOffset(const PeerMessage* message, int pieceLength, int pieces, long long int totalLength);
static void checkBitfield(const PeerMessage* message, int pieces);
public:
static PeerMessage* createPeerMessage(const char* msg, int len);
static void checkIntegrity(const PeerMessage* message, int pieceLength, int pieces, long long int totalLength);
static HandshakeMessage* createHandshakeMessage(const char* msg);
static void checkHandshake(const HandshakeMessage* message, const unsigned char* infoHash);
};
#endif // _D_PEER_MESSAGE_UTIL_H_
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