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/**************************************************************************/
/* */
/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com) */
/* Copyright (c) 2008-2017 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de> */
/* Copyright (c) 2014-2022 Ulrich Sibiller <uli42@gmx.de> */
/* Copyright (c) 2014-2019 Mihai Moldovan <ionic@ionic.de> */
/* Copyright (c) 2011-2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com) */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of the aforementioned persons and companies. */
/* */
/* Redistribution and use of the present software is allowed according */
/* to terms specified in the file LICENSE.nxcomp which comes in the */
/* source distribution. */
/* */
/* All rights reserved. */
/* */
/* NOTE: This software has received contributions from various other */
/* contributors, only the core maintainers and supporters are listed as */
/* copyright holders. Please contact us, if you feel you should be listed */
/* as copyright holder, as well. */
/* */
/**************************************************************************/
#ifndef ReadBuffer_H
#define ReadBuffer_H
#include "Misc.h"
#include "Timestamp.h"
#include "Transport.h"
#define READ_BUFFER_DEFAULT_SIZE 8192
#define PANIC
#define WARNING
#undef TEST
#undef DEBUG
class ReadBuffer
{
public:
ReadBuffer(Transport *transport);
virtual ~ReadBuffer();
int readMessage();
void readMessage(const unsigned char *message, unsigned int length);
const unsigned char *getMessage(unsigned int &dataLength)
{
unsigned int controlLength;
return getMessage(controlLength, dataLength);
}
const unsigned char *getMessage(unsigned int &controlLength, unsigned int &dataLength);
unsigned int getLength() const
{
return length_;
}
unsigned int getRemaining() const
{
return remaining_;
}
int setSize(int initialReadSize, int initialbufferSize);
void fullReset();
//
// Check if there is a complete
// message in the buffer.
//
int checkMessage()
{
if (length_ == 0)
{
return 0;
}
else
{
unsigned int controlLength;
unsigned int dataLength;
unsigned int trailerLength;
return (locateMessage(buffer_ + start_, buffer_ + start_ + length_,
controlLength, dataLength, trailerLength));
}
}
protected:
virtual unsigned int suggestedLength(unsigned int pendingLength) = 0;
virtual int locateMessage(const unsigned char *start,
const unsigned char *end,
unsigned int &controlLength,
unsigned int &dataLength,
unsigned int &trailerLength) = 0;
unsigned char *allocateBuffer(unsigned int newSize);
void appendBuffer(const unsigned char *message, unsigned int length);
void convertBuffer();
Transport *transport_;
unsigned char *buffer_;
unsigned int length_;
unsigned int size_;
unsigned int start_;
unsigned int remaining_;
int owner_;
unsigned int initialReadSize_;
unsigned int maximumBufferSize_;
};
#endif /* ReadBuffer_H */
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