/**************************************************************************/ /* */ /* 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. */ /* */ /**************************************************************************/ #include "ChangeGC.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 ChangeGCStore::parseIdentity(Message *message, const unsigned char *buffer, unsigned int size, int bigEndian) const { ChangeGCMessage *changeGC = (ChangeGCMessage *) message; // // Here is the fingerprint. // changeGC -> gcontext = GetULONG(buffer + 4, bigEndian); changeGC -> value_mask = GetULONG(buffer + 8, 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 changeGC -> value_mask &= (1 << 23) - 1; unsigned int mask = 0x1; unsigned char *source = (unsigned char *) buffer + CHANGEGC_DATA_OFFSET; unsigned long value = 0; for (unsigned int i = 0; i < 23; i++) { if (changeGC -> 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 ChangeGCStore::unparseIdentity(const Message *message, unsigned char *buffer, unsigned int size, int bigEndian) const { ChangeGCMessage *changeGC = (ChangeGCMessage *) message; // // Fill all the message's fields. // PutULONG(changeGC -> gcontext, buffer + 4, bigEndian); PutULONG(changeGC -> value_mask, buffer + 8, bigEndian); #ifdef DEBUG *logofs << name() << ": Unparsed identity for message at " << this << ".\n" << logofs_flush; #endif return 1; } void ChangeGCStore::dumpIdentity(const Message *message) const { #ifdef DUMP ChangeGCMessage *changeGC = (ChangeGCMessage *) message; *logofs << name() << ": Identity gcontext " << changeGC -> gcontext << ", mask " << changeGC -> value_mask << ", size " << changeGC -> size_ << ".\n" << logofs_flush; #endif } void ChangeGCStore::identityChecksum(const Message *message, const unsigned char *buffer, unsigned int size, int bigEndian) const { /* md5_append(md5_state_, buffer + 4, 8); */ md5_append(md5_state_, buffer + 8, 4); } void ChangeGCStore::updateIdentity(EncodeBuffer &encodeBuffer, const Message *message, const Message *cachedMessage, ChannelCache *channelCache) const { ChangeGCMessage *changeGC = (ChangeGCMessage *) message; ChangeGCMessage *cachedChangeGC = (ChangeGCMessage *) cachedMessage; ClientCache *clientCache = (ClientCache *) channelCache; #ifdef TEST *logofs << name() << ": Encoding value " << changeGC -> gcontext << " as gcontext field.\n" << logofs_flush; #endif encodeBuffer.encodeXidValue(changeGC -> gcontext, clientCache -> gcCache); cachedChangeGC -> gcontext = changeGC -> gcontext; } void ChangeGCStore::updateIdentity(DecodeBuffer &decodeBuffer, const Message *message, ChannelCache *channelCache) const { ChangeGCMessage *changeGC = (ChangeGCMessage *) message; ClientCache *clientCache = (ClientCache *) channelCache; unsigned int value; decodeBuffer.decodeXidValue(value, clientCache -> gcCache); changeGC -> gcontext = value; #ifdef DEBUG *logofs << name() << ": Decoded value " << changeGC -> gcontext << " as gcontext field.\n" << logofs_flush; #endif }