mirror of https://github.com/aria2/aria2
81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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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 Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef _D_PEER_MESSAGE_UTIL_H_
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#define _D_PEER_MESSAGE_UTIL_H_
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#include "common.h"
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#define MAX_BLOCK_LENGTH (128*1024)
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class PeerMessageUtil {
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private:
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PeerMessageUtil() {}
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public:
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static int32_t getIntParam(const unsigned char* msg, int32_t offset);
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static int16_t getShortIntParam(const unsigned char* msg, int32_t offset);
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static void setIntParam(unsigned char* dest, int32_t param);
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static void setShortIntParam(unsigned char* dest, int16_t param);
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static int8_t getId(const unsigned char* msg);
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static void checkIndex(int32_t index, int32_t pieces);
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static void checkBegin(int32_t begin, int32_t pieceLength);
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static void checkLength(int32_t length);
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static void checkRange(int32_t begin, int32_t length, int32_t pieceLength);
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static void checkBitfield(const unsigned char* bitfield,
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int32_t bitfieldLength,
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int32_t pieces);
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static void createPeerMessageString(unsigned char* msg,
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int32_t msgLength,
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int32_t payloadLength,
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int8_t messageId);
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/**
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* Creates compact tracker format(6bytes for ipv4 address and port)
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* and stores the results in compact.
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* compact must be at least 6 bytes and pre-allocated.
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* Returns true if creation is successful, otherwise returns false.
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* The example of failure reason is that addr is not numbers-and-dots
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* notation.
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*/
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static bool createcompact(char* compact, const string& addr, uint16_t port);
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};
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#endif // _D_PEER_MESSAGE_UTIL_H_
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