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authorMihai Moldovan <ionic@ionic.de>2017-07-26 10:38:46 +0200
committerMihai Moldovan <ionic@ionic.de>2017-07-26 10:38:46 +0200
commit7897834ce578dc394649ed09acb9f95fc04915ff (patch)
treea0bcbfa2c4ae1111ad3d49390c7abd0ae3a9a2ed /nxcomp/src/CreateGC.cpp
parent9193d11eeeea933e293acd5e0f03fa4e9887186b (diff)
parent4afc641fdd8c03bd708f50e0c3691b5de7ea1dba (diff)
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Merge branch 'sunweaver-pr/nxcomp-autoreconf' into 3.6.x
Attributes GH PR #480: https://github.com/ArcticaProject/nx-libs/pull/480
Diffstat (limited to 'nxcomp/src/CreateGC.cpp')
-rw-r--r--nxcomp/src/CreateGC.cpp194
1 files changed, 194 insertions, 0 deletions
diff --git a/nxcomp/src/CreateGC.cpp b/nxcomp/src/CreateGC.cpp
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+/**************************************************************************/
+/* */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com) */
+/* Copyright (c) 2008-2014 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de> */
+/* Copyright (c) 2014-2016 Ulrich Sibiller <uli42@gmx.de> */
+/* Copyright (c) 2014-2016 Mihai Moldovan <ionic@ionic.de> */
+/* Copyright (c) 2011-2016 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 "CreateGC.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 CreateGCStore::parseIdentity(Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ CreateGCMessage *createGC = (CreateGCMessage *) message;
+
+ //
+ // Here is the fingerprint.
+ //
+
+ createGC -> gcontext = GetULONG(buffer + 4, bigEndian);
+ createGC -> drawable = GetULONG(buffer + 8, bigEndian);
+ createGC -> value_mask = GetULONG(buffer + 12, bigEndian);
+
+ //
+ // Clear the unused bytes carried in the
+ // payload to increase the effectiveness
+ // of the caching algorithm.
+ //
+
+ if ((int) size > dataOffset)
+ {
+ #ifdef DEBUG
+ *logofs << name() << ": Removing unused bytes from the "
+ << "data payload.\n" << logofs_flush;
+ #endif
+
+ createGC -> value_mask &= (1 << 23) - 1;
+
+ unsigned int mask = 0x1;
+ unsigned char *source = (unsigned char *) buffer + CREATEGC_DATA_OFFSET;
+ unsigned long value = 0;
+
+ for (unsigned int i = 0; i < 23; i++)
+ {
+ if (createGC -> value_mask & mask)
+ {
+ value = GetULONG(source, bigEndian);
+
+ value &= (0xffffffff >> (32 - CREATEGC_FIELD_WIDTH[i]));
+
+ 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 CreateGCStore::unparseIdentity(const Message *message, unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ CreateGCMessage *createGC = (CreateGCMessage *) message;
+
+ //
+ // Fill all the message's fields.
+ //
+
+ PutULONG(createGC -> gcontext, buffer + 4, bigEndian);
+ PutULONG(createGC -> drawable, buffer + 8, bigEndian);
+ PutULONG(createGC -> value_mask, buffer + 12, bigEndian);
+
+ #ifdef DEBUG
+ *logofs << name() << ": Unparsed identity for message at "
+ << this << ".\n" << logofs_flush;
+ #endif
+
+ return 1;
+}
+
+void CreateGCStore::dumpIdentity(const Message *message) const
+{
+ #ifdef DUMP
+
+ CreateGCMessage *createGC = (CreateGCMessage *) message;
+
+ *logofs << name() << ": Identity gcontext " << createGC -> gcontext << ", drawable "
+ << createGC -> drawable << ", value_mask " << createGC -> value_mask
+ << ", size " << createGC -> size_ << ".\n" << logofs_flush;
+ #endif
+}
+
+void CreateGCStore::identityChecksum(const Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const
+{
+ //
+ // This didn't include the drawable
+ // in previous versions.
+ //
+
+ md5_append(md5_state_, buffer + 8, 8);
+}
+
+void CreateGCStore::updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
+ const Message *cachedMessage,
+ ChannelCache *channelCache) const
+{
+ CreateGCMessage *createGC = (CreateGCMessage *) message;
+ CreateGCMessage *cachedCreateGC = (CreateGCMessage *) cachedMessage;
+
+ ClientCache *clientCache = (ClientCache *) channelCache;
+
+ // Since ProtoStep7 (#issue 108)
+ #ifdef TEST
+ *logofs << name() << ": Encoding value " << createGC -> gcontext
+ << " as gcontext field.\n" << logofs_flush;
+ #endif
+
+ encodeBuffer.encodeNewXidValue(createGC -> gcontext, clientCache -> lastId,
+ clientCache -> lastIdCache, clientCache -> gcCache,
+ clientCache -> freeGCCache);
+
+ cachedCreateGC -> gcontext = createGC -> gcontext;
+}
+
+void CreateGCStore::updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
+ ChannelCache *channelCache) const
+{
+ CreateGCMessage *createGC = (CreateGCMessage *) message;
+
+ ClientCache *clientCache = (ClientCache *) channelCache;
+
+ unsigned int value;
+
+ // Since ProtoStep7 (#issue 108)
+ decodeBuffer.decodeNewXidValue(value, clientCache -> lastId,
+ clientCache -> lastIdCache, clientCache -> gcCache,
+ clientCache -> freeGCCache);
+
+ createGC -> gcontext = value;
+
+ #ifdef TEST
+ *logofs << name() << ": Decoded value " << createGC -> gcontext
+ << " as gcontext field.\n" << logofs_flush;
+ #endif
+}