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-rwxr-xr-xnxcomp/GenericRequest.cpp327
1 files changed, 327 insertions, 0 deletions
diff --git a/nxcomp/GenericRequest.cpp b/nxcomp/GenericRequest.cpp
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+++ b/nxcomp/GenericRequest.cpp
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+/**************************************************************************/
+/* */
+/* Copyright (c) 2001, 2007 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 NoMachine S.r.l. */
+/* */
+/* All rights reserved. */
+/* */
+/**************************************************************************/
+
+#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;
+ enableCompress = GENERICREQUEST_ENABLE_COMPRESS;
+
+ if (control -> isProtoStep7() == 1)
+ {
+ enableCompress = GENERICREQUEST_ENABLE_COMPRESS_IF_PROTO_STEP_7;
+
+ enableCompress = 0;
+ }
+
+ 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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