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authorReinhard Tartler <siretart@tauware.de>2011-11-13 09:27:51 +0100
committerReinhard Tartler <siretart@tauware.de>2011-11-13 09:27:51 +0100
commit3e924126b56c4d421e8263d25f6b14aa4ceed047 (patch)
tree921403de7b834fb1ac89f97d84ce105e0b487051 /nxcomp/ConfigureWindow.cpp
parenta840692edc9c6d19cd7c057f68e39c7d95eb767d (diff)
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Imported nxcomp-3.1.0-4.tar.gznxcomp/3.1.0-4
Summary: Imported nxcomp-3.1.0-4.tar.gz Keywords: Imported nxcomp-3.1.0-4.tar.gz into Git repository
Diffstat (limited to 'nxcomp/ConfigureWindow.cpp')
-rwxr-xr-xnxcomp/ConfigureWindow.cpp130
1 files changed, 130 insertions, 0 deletions
diff --git a/nxcomp/ConfigureWindow.cpp b/nxcomp/ConfigureWindow.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 "ConfigureWindow.h"
+
+#include "ClientCache.h"
+
+#include "EncodeBuffer.h"
+#include "DecodeBuffer.h"
+
+//
+// Set the verbosity level.
+//
+
+#define PANIC
+#define WARNING
+#undef TEST
+#undef DEBUG
+#undef DUMP
+
+//
+// Here are the methods to handle messages' content.
+//
+
+int ConfigureWindowStore::parseIdentity(Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ ConfigureWindowMessage *configureWindow = (ConfigureWindowMessage *) message;
+
+ //
+ // Here is the fingerprint.
+ //
+
+ configureWindow -> window = GetULONG(buffer + 4, bigEndian);
+
+ configureWindow -> value_mask = GetUINT(buffer + 8, bigEndian);
+
+ //
+ // To increase effectiveness of the caching algorithm
+ // we remove the unused bytes carried in the data part.
+ //
+
+ if ((int) size > dataOffset)
+ {
+ #ifdef DEBUG
+ *logofs << name() << ": Removing unused bytes from the data payload.\n" << logofs_flush;
+ #endif
+
+ configureWindow -> value_mask &= (1 << 7) - 1;
+
+ unsigned int mask = 0x1;
+ unsigned char *source = (unsigned char *) buffer + CONFIGUREWINDOW_DATA_OFFSET;
+ unsigned long value = 0;
+
+ for (unsigned int i = 0; i < 7; i++)
+ {
+ if (configureWindow -> value_mask & mask)
+ {
+ value = GetULONG(source, bigEndian);
+
+ value &= (1 << CONFIGUREWINDOW_FIELD_WIDTH[i]) - 1;
+
+ PutULONG(value, source, bigEndian);
+
+ source += 4;
+ }
+ mask <<= 1;
+ }
+ }
+
+ #ifdef DEBUG
+ *logofs << name() << ": Parsed Identity for message at " << this << ".\n" << logofs_flush;
+ #endif
+
+ return 1;
+}
+
+int ConfigureWindowStore::unparseIdentity(const Message *message, unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ ConfigureWindowMessage *configureWindow = (ConfigureWindowMessage *) message;
+
+ //
+ // Fill all the message's fields.
+ //
+
+ PutULONG(configureWindow -> window, buffer + 4, bigEndian);
+
+ PutUINT(configureWindow -> value_mask, buffer + 8, bigEndian);
+
+ #ifdef DEBUG
+ *logofs << name() << ": Unparsed identity for message at " << this << ".\n" << logofs_flush;
+ #endif
+
+ return 1;
+}
+
+void ConfigureWindowStore::dumpIdentity(const Message *message) const
+{
+ #ifdef DUMP
+
+ ConfigureWindowMessage *configureWindow = (ConfigureWindowMessage *) message;
+
+ *logofs << "ConfigureWindow: window " << configureWindow -> window
+ << ", value_mask " << configureWindow -> value_mask
+ << ", size " << configureWindow -> size_ << ".\n";
+
+ #endif
+}
+
+void ConfigureWindowStore::identityChecksum(const Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ md5_append(md5_state_, buffer + 4, 4);
+ md5_append(md5_state_, buffer + 8, 2);
+}