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/**************************************************************************/
/* */
/* Copyright (c) 2001, 2009 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. */
/* */
/**************************************************************************/
#include "SetUnpackAlpha.h"
#include "ClientCache.h"
#include "EncodeBuffer.h"
#include "DecodeBuffer.h"
#include "WriteBuffer.h"
//
// Set the verbosity level.
//
#define PANIC
#define WARNING
#undef TEST
#undef DEBUG
#undef DUMP
//
// Constructors and destructors.
//
SetUnpackAlphaStore::SetUnpackAlphaStore(StaticCompressor *compressor)
: MessageStore(compressor)
{
enableCache = SETUNPACKALPHA_ENABLE_CACHE;
enableData = SETUNPACKALPHA_ENABLE_DATA;
enableSplit = SETUNPACKALPHA_ENABLE_SPLIT_IF_PROTO_STEP_7;
enableCompress = SETUNPACKALPHA_ENABLE_COMPRESS_IF_PROTO_STEP_7;
dataLimit = SETUNPACKALPHA_DATA_LIMIT;
dataOffset = SETUNPACKALPHA_DATA_OFFSET_IF_PROTO_STEP_7;
cacheSlots = SETUNPACKALPHA_CACHE_SLOTS;
cacheThreshold = SETUNPACKALPHA_CACHE_THRESHOLD;
cacheLowerThreshold = SETUNPACKALPHA_CACHE_LOWER_THRESHOLD;
if (control -> isProtoStep8() == 1)
{
enableSplit = SETUNPACKALPHA_ENABLE_SPLIT_IF_PROTO_STEP_8;
}
messages_ -> resize(cacheSlots);
for (T_messages::iterator i = messages_ -> begin();
i < messages_ -> end(); i++)
{
*i = NULL;
}
temporary_ = NULL;
}
SetUnpackAlphaStore::~SetUnpackAlphaStore()
{
for (T_messages::iterator i = messages_ -> begin();
i < messages_ -> end(); i++)
{
destroy(*i);
}
destroy(temporary_);
}
//
// Here are the methods to handle messages' content.
//
int SetUnpackAlphaStore::encodeIdentity(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
const unsigned int size, int bigEndian,
ChannelCache *channelCache) const
{
ClientCache *clientCache = (ClientCache *) channelCache;
#ifdef DEBUG
*logofs << name() << ": Encoding full message identity.\n" << logofs_flush;
#endif
//
// Encode the source length first because
// we need it to determine the size of
// the output buffer.
//
// SrcLength.
encodeBuffer.encodeValue(GetULONG(buffer + 8, bigEndian), 32, 9);
// Client.
encodeBuffer.encodeCachedValue(*(buffer + 1), 8,
clientCache -> resourceCache);
// Method.
encodeBuffer.encodeCachedValue(*(buffer + 4), 8,
clientCache -> methodCache);
// DstLength.
encodeBuffer.encodeValue(GetULONG(buffer + 12, bigEndian), 32, 9);
#ifdef DEBUG
*logofs << name() << ": Encoded full message identity.\n" << logofs_flush;
#endif
return 1;
}
int SetUnpackAlphaStore::decodeIdentity(DecodeBuffer &decodeBuffer, unsigned char *&buffer,
unsigned int &size, int bigEndian, WriteBuffer *writeBuffer,
ChannelCache *channelCache) const
{
ClientCache *clientCache = (ClientCache *) channelCache;
#ifdef DEBUG
*logofs << name() << ": Decoding full message identity.\n" << logofs_flush;
#endif
unsigned int value;
unsigned char cValue;
// SrcLength.
decodeBuffer.decodeValue(value, 32, 9);
size = RoundUp4(value) + 16;
buffer = writeBuffer -> addMessage(size);
PutULONG(value, buffer + 8, bigEndian);
// Client.
decodeBuffer.decodeCachedValue(cValue, 8,
clientCache -> resourceCache);
*(buffer + 1) = cValue;
// Method.
decodeBuffer.decodeCachedValue(cValue, 8,
clientCache -> methodCache);
*(buffer + 4) = cValue;
// DstLength.
decodeBuffer.decodeValue(value, 32, 9);
PutULONG(value, buffer + 12, bigEndian);
#ifdef DEBUG
*logofs << name() << ": Decoded full message identity.\n" << logofs_flush;
#endif
return 1;
}
int SetUnpackAlphaStore::parseIdentity(Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const
{
SetUnpackAlphaMessage *setUnpackAlpha = (SetUnpackAlphaMessage *) message;
setUnpackAlpha -> client = *(buffer + 1);
setUnpackAlpha -> method = *(buffer + 4);
setUnpackAlpha -> src_length = GetULONG(buffer + 8, bigEndian);
setUnpackAlpha -> dst_length = GetULONG(buffer + 12, bigEndian);
#ifdef DEBUG
*logofs << name() << ": Parsed identity for message at " << message << ".\n" << logofs_flush;
#endif
return 1;
}
int SetUnpackAlphaStore::unparseIdentity(const Message *message, unsigned char *buffer,
unsigned int size, int bigEndian) const
{
SetUnpackAlphaMessage *setUnpackAlpha = (SetUnpackAlphaMessage *) message;
*(buffer + 1) = setUnpackAlpha -> client;
*(buffer + 4) = setUnpackAlpha -> method;
PutULONG(setUnpackAlpha -> src_length, buffer + 8, bigEndian);
PutULONG(setUnpackAlpha -> dst_length, buffer + 12, bigEndian);
#ifdef DEBUG
*logofs << name() << ": Unparsed identity for message at " << message << ".\n" << logofs_flush;
#endif
return 1;
}
void SetUnpackAlphaStore::dumpIdentity(const Message *message) const
{
#ifdef DUMP
SetUnpackAlphaMessage *setUnpackAlpha = (SetUnpackAlphaMessage *) message;
*logofs << name() << ": Identity client "
<< (unsigned int) setUnpackAlpha -> client << " method "
<< (unsigned int) setUnpackAlpha -> method << " source length "
<< setUnpackAlpha -> src_length << " destination length "
<< setUnpackAlpha -> dst_length << " size "
<< setUnpackAlpha -> size_ << ".\n";
#endif
}
void SetUnpackAlphaStore::identityChecksum(const Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const
{
//
// Include the pack method and the source
// and destination length.
//
md5_append(md5_state_, buffer + 4, 1);
md5_append(md5_state_, buffer + 8, 8);
}
void SetUnpackAlphaStore::updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
const Message *cachedMessage,
ChannelCache *channelCache) const
{
SetUnpackAlphaMessage *setUnpackAlpha = (SetUnpackAlphaMessage *) message;
SetUnpackAlphaMessage *cachedSetUnpackAlpha = (SetUnpackAlphaMessage *) cachedMessage;
ClientCache *clientCache = (ClientCache *) channelCache;
encodeBuffer.encodeCachedValue(setUnpackAlpha -> client, 8,
clientCache -> resourceCache);
cachedSetUnpackAlpha -> client = setUnpackAlpha -> client;
}
void SetUnpackAlphaStore::updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
ChannelCache *channelCache) const
{
SetUnpackAlphaMessage *setUnpackAlpha = (SetUnpackAlphaMessage *) message;
ClientCache *clientCache = (ClientCache *) channelCache;
decodeBuffer.decodeCachedValue(setUnpackAlpha -> client, 8,
clientCache -> resourceCache);
}
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