Merge branch 'nxcomp'

1 files changed, 327 insertions, 0 deletions

diff --git a/nxcomp/GenericRequest.cpp b/nxcomp/GenericRequest.cpp
new file mode 100644
index 000000000..40077291b
--- /dev/null
+++ b/nxcomp/GenericRequest.cpp
@@ -0,0 +1,327 @@
+/**************************************************************************/
+/*                                                                        */
+/* 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 "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
+  }
+}