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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. */
/* */
/**************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "GenericRequest.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.
//
GenericRequestStore::GenericRequestStore(StaticCompressor *compressor)
: MessageStore(compressor)
{
enableCache = GENERICREQUEST_ENABLE_CACHE;
enableData = GENERICREQUEST_ENABLE_DATA;
enableSplit = GENERICREQUEST_ENABLE_SPLIT;
// Since ProtoStep7 (#issue 108)
enableCompress = GENERICREQUEST_ENABLE_COMPRESS_IF_PROTO_STEP_7;
dataLimit = GENERICREQUEST_DATA_LIMIT;
dataOffset = GENERICREQUEST_DATA_OFFSET;
cacheSlots = GENERICREQUEST_CACHE_SLOTS;
cacheThreshold = GENERICREQUEST_CACHE_THRESHOLD;
cacheLowerThreshold = GENERICREQUEST_CACHE_LOWER_THRESHOLD;
messages_ -> resize(cacheSlots);
for (T_messages::iterator i = messages_ -> begin();
i < messages_ -> end(); i++)
{
*i = NULL;
}
temporary_ = NULL;
}
GenericRequestStore::~GenericRequestStore()
{
for (T_messages::iterator i = messages_ -> begin();
i < messages_ -> end(); i++)
{
destroy(*i);
}
destroy(temporary_);
}
//
// Here are the methods to handle messages' content.
//
int GenericRequestStore::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
encodeBuffer.encodeValue(size >> 2, 16, 10);
encodeBuffer.encodeCachedValue(*(buffer + 1), 8,
clientCache -> genericRequestOpcodeCache);
for (unsigned int i = 0; i < 8 && (i * 2 + 4) < size; i++)
{
#ifdef DEBUG
*logofs << name() << ": Encoding data[" << i << "] "
<< "at position " << i * 2 + 4 << " with value "
<< GetUINT(buffer + (i * 2) + 4, bigEndian)
<< ".\n" << logofs_flush;
#endif
encodeBuffer.encodeCachedValue(GetUINT(buffer + (i * 2) + 4, bigEndian), 16,
*clientCache -> genericRequestDataCache[i]);
}
#ifdef DEBUG
*logofs << name() << ": Encoded full message identity.\n" << logofs_flush;
#endif
return 1;
}
int GenericRequestStore::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
decodeBuffer.decodeValue(size, 16, 10);
size <<= 2;
buffer = writeBuffer -> addMessage(size);
decodeBuffer.decodeCachedValue(*(buffer + 1), 8,
clientCache -> genericRequestOpcodeCache);
unsigned int value;
for (unsigned int i = 0; i < 8 && (i * 2 + 4) < size; i++)
{
decodeBuffer.decodeCachedValue(value, 16,
*clientCache -> genericRequestDataCache[i]);
#ifdef DEBUG
*logofs << name() << ": Decoding data[" << i << "] "
<< "at position " << i * 2 + 4 << " with value "
<< value << ".\n" << logofs_flush;
#endif
PutUINT(value, buffer + 4 + (i * 2), bigEndian);
}
#ifdef DEBUG
*logofs << name() << ": Decoded full message identity.\n" << logofs_flush;
#endif
return 1;
}
int GenericRequestStore::parseIdentity(Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const
{
GenericRequestMessage *genericRequest = (GenericRequestMessage *) message;
genericRequest -> opcode = *(buffer + 1);
for (unsigned int i = 0; i < 8; i++)
{
if ((i * 2 + 4) < size)
{
genericRequest -> data[i] = GetUINT(buffer + i * 2 + 4, bigEndian);
#ifdef DEBUG
*logofs << name() << ": Parsed data[" << i << "] "
<< "with value " << genericRequest -> data[i]
<< ".\n" << logofs_flush;
#endif
}
else
{
genericRequest -> data[i] = 0;
}
}
#ifdef DEBUG
*logofs << name() << ": Parsed identity for message at "
<< this << ".\n" << logofs_flush;
#endif
return 1;
}
int GenericRequestStore::unparseIdentity(const Message *message, unsigned char *buffer,
unsigned int size, int bigEndian) const
{
GenericRequestMessage *genericRequest = (GenericRequestMessage *) message;
*(buffer + 1) = genericRequest -> opcode;
for (unsigned int i = 0; i < 8 && (i * 2 + 4) < size; i++)
{
#ifdef DEBUG
*logofs << name() << ": Unparsed data[" << i << "] "
<< "with value " << genericRequest -> data[i]
<< ".\n" << logofs_flush;
#endif
PutUINT(genericRequest -> data[i], buffer + i * 2 + 4, bigEndian);
}
#ifdef DEBUG
*logofs << name() << ": Unparsed identity for message at "
<< this << ".\n" << logofs_flush;
#endif
return 1;
}
void GenericRequestStore::dumpIdentity(const Message *message) const
{
#ifdef DUMP
GenericRequestMessage *genericRequest = (GenericRequestMessage *) message;
*logofs << name() << ": Identity opcode " << (unsigned) genericRequest -> opcode;
for (int i = 0; i < 8; i++)
{
*logofs << ", data[" << i << "] " << genericRequest -> data[i];
}
*logofs << ", size " << genericRequest -> size_ << ".\n" << logofs_flush;
#endif
}
void GenericRequestStore::identityChecksum(const Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const
{
//
// As data offset can be beyond the real end of
// the message, we need to include the message's
// size or we will match any message whose size
// is less or equal to the data offset.
//
md5_append(md5_state_, buffer + 2, 2);
}
void GenericRequestStore::updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
const Message *cachedMessage,
ChannelCache *channelCache) const
{
//
// Encode the variant part.
//
GenericRequestMessage *genericRequest = (GenericRequestMessage *) message;
GenericRequestMessage *cachedGenericRequest = (GenericRequestMessage *) cachedMessage;
ClientCache *clientCache = (ClientCache *) channelCache;
#ifdef TEST
*logofs << name() << ": Updating value "
<< (unsigned) genericRequest -> opcode
<< " as opcode field.\n" << logofs_flush;
#endif
encodeBuffer.encodeCachedValue((unsigned int) genericRequest -> opcode, 8,
clientCache -> genericRequestOpcodeCache);
cachedGenericRequest -> opcode = genericRequest -> opcode;
for (int i = 0; i < 8 && (i * 2 + 4) < genericRequest -> size_; i++)
{
#ifdef TEST
*logofs << name() << ": Updating data[" << i << "] "
<< "with value " << genericRequest -> data[i]
<< ".\n" << logofs_flush;
#endif
encodeBuffer.encodeCachedValue((unsigned int) genericRequest -> data[i], 16,
*clientCache -> genericRequestDataCache[i]);
cachedGenericRequest -> data[i] = genericRequest -> data[i];
}
}
void GenericRequestStore::updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
ChannelCache *channelCache) const
{
GenericRequestMessage *genericRequest = (GenericRequestMessage *) message;
ClientCache *clientCache = (ClientCache *) channelCache;
decodeBuffer.decodeCachedValue(genericRequest -> opcode, 8,
clientCache -> genericRequestOpcodeCache);
#ifdef TEST
*logofs << name() << ": Updated value "
<< (unsigned) genericRequest -> opcode
<< " as opcode field.\n" << logofs_flush;
#endif
unsigned int value;
for (int i = 0; i < 8 && (i * 2 + 4) < genericRequest -> size_; i++)
{
decodeBuffer.decodeCachedValue(value, 16,
*clientCache -> genericRequestDataCache[i]);
genericRequest -> data[i] = (unsigned short) value;
#ifdef TEST
*logofs << name() << ": Updated data[" << i << "] "
<< "with value " << genericRequest -> data[i]
<< ".\n" << logofs_flush;
#endif
}
}
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