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Diffstat (limited to 'nxcomp/ChangeProperty.cpp')
| -rw-r--r-- | nxcomp/ChangeProperty.cpp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/nxcomp/ChangeProperty.cpp b/nxcomp/ChangeProperty.cpp new file mode 100644 index 000000000..0270d7274 --- /dev/null +++ b/nxcomp/ChangeProperty.cpp @@ -0,0 +1,179 @@ +/**************************************************************************/ +/* */ +/* 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 "ChangeProperty.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 ChangePropertyStore::parseIdentity(Message *message, const unsigned char *buffer, + unsigned int size, int bigEndian) const +{ + ChangePropertyMessage *changeProperty = (ChangePropertyMessage *) message; + + changeProperty -> mode = *(buffer + 1); + changeProperty -> format = *(buffer + 16); + + changeProperty -> window = GetULONG(buffer + 4, bigEndian); + changeProperty -> property = GetULONG(buffer + 8, bigEndian); + changeProperty -> type = GetULONG(buffer + 12, bigEndian); + changeProperty -> length = GetULONG(buffer + 20, bigEndian); + + // + // Cleanup the padding bytes. + // + + unsigned int uiFormat; + unsigned int uiLengthInBytes; + + if ((int) size > CHANGEPROPERTY_DATA_OFFSET) + { + uiFormat = *(buffer + 16); + + uiLengthInBytes = changeProperty -> length; + + #ifdef DEBUG + *logofs << name() << ": length " << uiLengthInBytes + << ", format " << uiFormat << ", size " + << size << ".\n" << logofs_flush; + #endif + + if (uiFormat == 16) + { + uiLengthInBytes <<= 1; + } + else if (uiFormat == 32) + { + uiLengthInBytes <<= 2; + } + + unsigned char *end = ((unsigned char *) buffer) + size; + unsigned char *pad = ((unsigned char *) buffer) + CHANGEPROPERTY_DATA_OFFSET + uiLengthInBytes; + + CleanData((unsigned char *) pad, end - pad); + } + + #ifdef DEBUG + *logofs << name() << ": Parsed identity for message at " + << message << ".\n" << logofs_flush; + #endif + + return 1; +} + +int ChangePropertyStore::unparseIdentity(const Message *message, unsigned char *buffer, + unsigned int size, int bigEndian) const +{ + ChangePropertyMessage *changeProperty = (ChangePropertyMessage *) message; + + *(buffer + 1) = changeProperty -> mode; + *(buffer + 16) = changeProperty -> format; + + PutULONG(changeProperty -> window, buffer + 4, bigEndian); + PutULONG(changeProperty -> property, buffer + 8, bigEndian); + PutULONG(changeProperty -> type, buffer + 12, bigEndian); + PutULONG(changeProperty -> length, buffer + 20, bigEndian); + + #ifdef DEBUG + *logofs << name() << ": Unparsed identity for message at " + << this << ".\n" << logofs_flush; + #endif + + return 1; +} + +void ChangePropertyStore::dumpIdentity(const Message *message) const +{ + #ifdef DUMP + + ChangePropertyMessage *changeProperty = (ChangePropertyMessage *) message; + + *logofs << name() << ": Identity mode " << (unsigned int) changeProperty -> mode << ", format " + << (unsigned int) changeProperty -> format << ", window " << changeProperty -> window + << ", property " << changeProperty -> property << ", type " << changeProperty -> type + << ", length " << changeProperty -> length << ", size " << changeProperty -> size_ + << ".\n" << logofs_flush; + + #endif +} + +void ChangePropertyStore::identityChecksum(const Message *message, const unsigned char *buffer, + unsigned int size, int bigEndian) const +{ + md5_append(md5_state_, buffer + 1, 1); + md5_append(md5_state_, buffer + 16, 1); + + md5_append(md5_state_, buffer + 8, 4); + md5_append(md5_state_, buffer + 12, 4); + md5_append(md5_state_, buffer + 20, 4); +} + +void ChangePropertyStore::updateIdentity(EncodeBuffer &encodeBuffer, const Message *message, + const Message *cachedMessage, + ChannelCache *channelCache) const +{ + ChangePropertyMessage *changeProperty = (ChangePropertyMessage *) message; + ChangePropertyMessage *cachedChangeProperty = (ChangePropertyMessage *) cachedMessage; + + ClientCache *clientCache = (ClientCache *) channelCache; + + #ifdef TEST + *logofs << name() << ": Encoding value " << changeProperty -> window + << " as window field.\n" << logofs_flush; + #endif + + encodeBuffer.encodeXidValue(changeProperty -> window, clientCache -> windowCache); + + cachedChangeProperty -> window = changeProperty -> window; +} + +void ChangePropertyStore::updateIdentity(DecodeBuffer &decodeBuffer, const Message *message, + ChannelCache *channelCache) const +{ + ChangePropertyMessage *changeProperty = (ChangePropertyMessage *) message; + + ClientCache *clientCache = (ClientCache *) channelCache; + + unsigned int value; + + decodeBuffer.decodeXidValue(value, clientCache -> windowCache); + + changeProperty -> window = value; + + #ifdef DEBUG + *logofs << name() << ": Decoded value " << changeProperty -> window + << " as window field.\n" << logofs_flush; + #endif +} + + |