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/**************************************************************************/
/* */
/* Copyright (c) 2001, 2010 NoMachine, http://www.nomachine.com/. */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of NoMachine. Redistribution and use of the present */
/* software is allowed according to terms specified in the file LICENSE */
/* which comes in the source distribution. */
/* */
/* Check http://www.nomachine.com/licensing.html for applicability. */
/* */
/* NX and NoMachine are trademarks of Medialogic S.p.A. */
/* */
/* All rights reserved. */
/* */
/**************************************************************************/
#ifndef ShapeExtension_H
#define ShapeExtension_H
#include "Message.h"
//
// Set the verbosity level.
//
#define PANIC
#define WARNING
#undef TEST
#undef DEBUG
#undef DUMP
//
// Set default values.
//
#define SHAPEEXTENSION_ENABLE_CACHE 1
#define SHAPEEXTENSION_ENABLE_DATA 1
#define SHAPEEXTENSION_ENABLE_SPLIT 0
#define SHAPEEXTENSION_DATA_LIMIT 3200
#define SHAPEEXTENSION_DATA_OFFSET 20
#define SHAPEEXTENSION_CACHE_SLOTS 3000
#define SHAPEEXTENSION_CACHE_THRESHOLD 10
#define SHAPEEXTENSION_CACHE_LOWER_THRESHOLD 5
#define SHAPEEXTENSION_ENABLE_COMPRESS_IF_PROTO_STEP_7 0
//
// The message class.
//
class ShapeExtensionMessage : public Message
{
friend class ShapeExtensionStore;
public:
ShapeExtensionMessage()
{
}
~ShapeExtensionMessage()
{
}
//
// Note for encoding in protocol level 1: we consider
// for this message a data offset of 4. Bytes from 5
// to 20, if present, are taken as part of identity
// and encoded through an array of int caches.
//
private:
unsigned char opcode;
unsigned short data[8];
};
class ShapeExtensionStore : public MessageStore
{
public:
ShapeExtensionStore(StaticCompressor *compressor);
virtual ~ShapeExtensionStore();
virtual const char *name() const
{
return "ShapeExtension";
}
virtual unsigned char opcode() const
{
return opcode_;
}
virtual unsigned int storage() const
{
return sizeof(ShapeExtensionMessage);
}
//
// Message handling methods.
//
public:
virtual Message *create() const
{
return new ShapeExtensionMessage();
}
virtual Message *create(const Message &message) const
{
return new ShapeExtensionMessage((const ShapeExtensionMessage &) message);
}
virtual void destroy(Message *message) const
{
delete (ShapeExtensionMessage *) message;
}
virtual int encodeIdentity(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
const unsigned int size, int bigEndian,
ChannelCache *channelCache) const;
virtual int decodeIdentity(DecodeBuffer &decodeBuffer, unsigned char *&buffer,
unsigned int &size, int bigEndian, WriteBuffer *writeBuffer,
ChannelCache *channelCache) const;
virtual int parseIdentity(Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const;
virtual int unparseIdentity(const Message *message, unsigned char *buffer,
unsigned int size, int bigEndian) const;
virtual void updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
const Message *cachedMessage,
ChannelCache *channelCache) const;
virtual void updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
ChannelCache *channelCache) const;
virtual void identityChecksum(const Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const;
virtual void dumpIdentity(const Message *message) const;
private:
unsigned char opcode_;
};
#endif /* ShapeExtension_H */