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-rw-r--r--nxcomp/ShapeExtension.cpp296
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diff --git a/nxcomp/ShapeExtension.cpp b/nxcomp/ShapeExtension.cpp
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+++ b/nxcomp/ShapeExtension.cpp
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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. */
+/* */
+/**************************************************************************/
+
+#include "ShapeExtension.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.
+//
+
+ShapeExtensionStore::ShapeExtensionStore(StaticCompressor *compressor)
+
+ : MessageStore(compressor)
+{
+ enableCache = SHAPEEXTENSION_ENABLE_CACHE;
+ enableData = SHAPEEXTENSION_ENABLE_DATA;
+ enableSplit = SHAPEEXTENSION_ENABLE_SPLIT;
+ enableCompress = SHAPEEXTENSION_ENABLE_COMPRESS;
+
+ if (control -> isProtoStep7() == 1)
+ {
+ enableCompress = SHAPEEXTENSION_ENABLE_COMPRESS_IF_PROTO_STEP_7;
+ }
+
+ dataLimit = SHAPEEXTENSION_DATA_LIMIT;
+ dataOffset = SHAPEEXTENSION_DATA_OFFSET;
+
+ cacheSlots = SHAPEEXTENSION_CACHE_SLOTS;
+ cacheThreshold = SHAPEEXTENSION_CACHE_THRESHOLD;
+ cacheLowerThreshold = SHAPEEXTENSION_CACHE_LOWER_THRESHOLD;
+
+ opcode_ = X_NXInternalShapeExtension;
+
+ messages_ -> resize(cacheSlots);
+
+ for (T_messages::iterator i = messages_ -> begin();
+ i < messages_ -> end(); i++)
+ {
+ *i = NULL;
+ }
+
+ temporary_ = NULL;
+}
+
+ShapeExtensionStore::~ShapeExtensionStore()
+{
+ for (T_messages::iterator i = messages_ -> begin();
+ i < messages_ -> end(); i++)
+ {
+ destroy(*i);
+ }
+
+ destroy(temporary_);
+}
+
+//
+// Here are the methods to handle messages' content.
+//
+
+int ShapeExtensionStore::encodeIdentity(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
+ const unsigned int size, int bigEndian,
+ ChannelCache *channelCache) const
+{
+ //
+ // Handle this extension in a way similar to shape.
+ //
+
+ ClientCache *clientCache = (ClientCache *) channelCache;
+
+ #ifdef DEBUG
+ *logofs << name() << ": Encoding full message identity.\n" << logofs_flush;
+ #endif
+
+ //
+ // We handle all possible requests of this extension
+ // using the same opcode. We give to message a data
+ // offset of 4 (or 16 if proto is >= 3) and handle
+ // the first 16 bytes through an array of caches.
+ //
+
+ encodeBuffer.encodeValue(size >> 2, 16, 10);
+
+ encodeBuffer.encodeCachedValue(*(buffer + 1), 8,
+ clientCache -> shapeOpcodeCache);
+
+ for (unsigned int i = 0; i < 8 && (i * 2 + 4) < size; i++)
+ {
+ encodeBuffer.encodeCachedValue(GetUINT(buffer + (i * 2) + 4, bigEndian), 16,
+ *clientCache -> shapeDataCache[i]);
+ }
+
+ #ifdef DEBUG
+ *logofs << name() << ": Encoded full message identity.\n" << logofs_flush;
+ #endif
+
+ return 1;
+}
+
+int ShapeExtensionStore::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 -> shapeOpcodeCache);
+
+ unsigned int value;
+
+ for (unsigned int i = 0; i < 8 && (i * 2 + 4) < size; i++)
+ {
+ decodeBuffer.decodeCachedValue(value, 16,
+ *clientCache -> shapeDataCache[i]);
+
+ PutUINT(value, buffer + 4 + (i * 2), bigEndian);
+ }
+
+ #ifdef DEBUG
+ *logofs << name() << ": Decoded full message identity.\n" << logofs_flush;
+ #endif
+
+ return 1;
+}
+
+int ShapeExtensionStore::parseIdentity(Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ ShapeExtensionMessage *shapeExtension = (ShapeExtensionMessage *) message;
+
+ shapeExtension -> opcode = *(buffer + 1);
+
+ for (unsigned int i = 0; i < 8; i++)
+ {
+ if ((i * 2 + 4) < size)
+ {
+ shapeExtension -> data[i] = GetUINT(buffer + i * 2 + 4, bigEndian);
+
+ #ifdef DEBUG
+ *logofs << name() << ": Parsed data[" << i << "].\n"
+ << logofs_flush;
+ #endif
+ }
+ else
+ {
+ shapeExtension -> data[i] = 0;
+ }
+ }
+
+ #ifdef DEBUG
+ *logofs << name() << ": Parsed identity for message at "
+ << this << ".\n" << logofs_flush;
+ #endif
+
+ return 1;
+}
+
+int ShapeExtensionStore::unparseIdentity(const Message *message, unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ ShapeExtensionMessage *shapeExtension = (ShapeExtensionMessage *) message;
+
+ *(buffer + 1) = shapeExtension -> opcode;
+
+ for (unsigned int i = 0; i < 8 && (i * 2 + 4) < size; i++)
+ {
+ PutUINT(shapeExtension -> data[i], buffer + i * 2 + 4, bigEndian);
+ }
+
+ #ifdef DEBUG
+ *logofs << name() << ": Unparsed identity for message at "
+ << this << ".\n" << logofs_flush;
+ #endif
+
+ return 1;
+}
+
+void ShapeExtensionStore::dumpIdentity(const Message *message) const
+{
+ #ifdef DUMP
+
+ ShapeExtensionMessage *shapeExtension = (ShapeExtensionMessage *) message;
+
+ *logofs << name() << ": Identity opcode " << (unsigned) shapeExtension -> opcode;
+
+ for (int i = 0; i < 8; i++)
+ {
+ *logofs << ", data[" << i << "] " << shapeExtension -> data[i];
+ }
+
+ *logofs << ", size " << shapeExtension -> size_ << ".\n" << logofs_flush;
+
+ #endif
+}
+
+void ShapeExtensionStore::identityChecksum(const Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ //
+ // Include minor opcode in the checksum. As data
+ // offset can be beyond the real end of message,
+ // we need to include size or we will match any
+ // message of size less or equal to data offset.
+ //
+
+ md5_append(md5_state_, buffer + 1, 3);
+}
+
+void ShapeExtensionStore::updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
+ const Message *cachedMessage,
+ ChannelCache *channelCache) const
+{
+ //
+ // Encode the variant part.
+ //
+
+ ShapeExtensionMessage *shapeExtension = (ShapeExtensionMessage *) message;
+ ShapeExtensionMessage *cachedShapeExtension = (ShapeExtensionMessage *) cachedMessage;
+
+ ClientCache *clientCache = (ClientCache *) channelCache;
+
+ for (int i = 0; i < 8 && (i * 2 + 4) < shapeExtension -> size_; i++)
+ {
+ #ifdef TEST
+ *logofs << name() << ": Encoding value " << shapeExtension -> data[i]
+ << " as data[" << i << "] field.\n" << logofs_flush;
+ #endif
+
+ encodeBuffer.encodeCachedValue((unsigned int) shapeExtension -> data[i], 16,
+ *clientCache -> shapeDataCache[i]);
+
+ cachedShapeExtension -> data[i] = shapeExtension -> data[i];
+ }
+}
+
+void ShapeExtensionStore::updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
+ ChannelCache *channelCache) const
+{
+ ShapeExtensionMessage *shapeExtension = (ShapeExtensionMessage *) message;
+
+ ClientCache *clientCache = (ClientCache *) channelCache;
+
+ unsigned int value;
+
+ for (int i = 0; i < 8 && (i * 2 + 4) < shapeExtension -> size_; i++)
+ {
+ decodeBuffer.decodeCachedValue(value, 16,
+ *clientCache -> shapeDataCache[i]);
+
+ shapeExtension -> data[i] = (unsigned short) value;
+
+ #ifdef TEST
+ *logofs << name() << ": Decoded value " << shapeExtension -> data[i]
+ << " as data[" << i << "] field.\n" << logofs_flush;
+ #endif
+ }
+}
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