aboutsummaryrefslogtreecommitdiff
path: root/nxcomp/Message.h
diff options
context:
space:
mode:
Diffstat (limited to 'nxcomp/Message.h')
-rwxr-xr-xnxcomp/Message.h1102
1 files changed, 1102 insertions, 0 deletions
diff --git a/nxcomp/Message.h b/nxcomp/Message.h
new file mode 100755
index 000000000..e50c917ed
--- /dev/null
+++ b/nxcomp/Message.h
@@ -0,0 +1,1102 @@
+/**************************************************************************/
+/* */
+/* 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. */
+/* */
+/**************************************************************************/
+
+#ifndef Message_H
+#define Message_H
+
+#include <X11/Xproto.h>
+
+#include "NXproto.h"
+
+#include "Misc.h"
+#include "Control.h"
+
+#include "Types.h"
+#include "Timestamp.h"
+
+#include "ActionCache.h"
+
+#include "ActionCacheCompat.h"
+#include "PositionCacheCompat.h"
+
+#include "StaticCompressor.h"
+
+//
+// Forward class declarations.
+//
+
+class ChannelCache;
+
+class EncodeBuffer;
+class DecodeBuffer;
+
+class WriteBuffer;
+
+//
+// Set the verbosity level.
+//
+
+#define PANIC
+#define WARNING
+#undef TEST
+#undef DEBUG
+
+//
+// Define this to know how many messages
+// are allocated and deallocated.
+//
+
+#undef REFERENCES
+
+//
+// Set default values. We limit the maximum
+// size of a request to 262144 but we need to
+// consider the replies, whose size may be up
+// to 4MB.
+//
+
+#define MESSAGE_ENABLE_CACHE 0
+#define MESSAGE_ENABLE_DATA 0
+#define MESSAGE_ENABLE_SPLIT 0
+#define MESSAGE_ENABLE_COMPRESS 0
+
+#define MESSAGE_DATA_LIMIT 4194304 - 4
+#define MESSAGE_DATA_OFFSET 4
+
+#define MESSAGE_CACHE_SLOTS 6000
+#define MESSAGE_CACHE_THRESHOLD 50
+#define MESSAGE_CACHE_LOWER_THRESHOLD 5
+
+//
+// Base message class.
+//
+
+class Message
+{
+ friend class MessageStore;
+ friend class RenderExtensionStore;
+
+ public:
+
+ Message()
+ {
+ hits_ = 0;
+ last_ = 0;
+ locks_ = 0;
+
+ size_ = 0;
+ c_size_ = 0;
+
+ md5_digest_ = NULL;
+
+ #ifdef REFERENCES
+
+ references_++;
+
+ *logofs << "Message: Created new message at "
+ << this << " out of " << references_
+ << " allocated messages.\n"
+ << logofs_flush;
+
+ #endif
+ }
+
+ Message(const Message &message)
+ {
+ size_ = message.size_;
+ c_size_ = message.c_size_;
+ i_size_ = message.i_size_;
+
+ hits_ = message.hits_;
+ last_ = message.last_;
+ locks_ = message.locks_;
+
+ data_ = message.data_;
+
+ #ifdef REFERENCES
+
+ references_++;
+
+ *logofs << "Message: Creating new copied message at "
+ << this << " out of " << references_
+ << " allocated messages.\n"
+ << logofs_flush;
+ #endif
+
+ if (message.md5_digest_ != NULL)
+ {
+ md5_digest_ = new md5_byte_t[MD5_LENGTH];
+
+ memcpy(md5_digest_, message.md5_digest_, MD5_LENGTH);
+
+ #ifdef DEBUG
+ *logofs << "Message: Created MD5 digest for object at "
+ << this << ".\n" << logofs_flush;
+ #endif
+ }
+ else
+ {
+ md5_digest_ = NULL;
+ }
+ }
+
+ ~Message()
+ {
+ #ifdef DEBUG
+ if (md5_digest_ != NULL)
+ {
+ *logofs << "Message: Deleted MD5 digest for object at "
+ << this << ".\n" << logofs_flush;
+ }
+ #endif
+
+ delete [] md5_digest_;
+
+ #ifdef REFERENCES
+
+ references_--;
+
+ *logofs << "Message: Deleted message at "
+ << this << " out of " << references_
+ << " allocated messages.\n"
+ << logofs_flush;
+ #endif
+ }
+
+ //
+ // This is the original message size
+ // including the data part regardless
+ // data is still stored in the object.
+ //
+
+ int size_;
+
+ //
+ // This is the size of the identity.
+ //
+
+ int i_size_;
+
+ //
+ // This is the size, including identity,
+ // after message has been 'updated' to
+ // reflect storage of data in compressed
+ // format.
+ //
+
+ int c_size_;
+
+ protected:
+
+ //
+ // This is the data part.
+ //
+
+ T_data data_;
+
+ //
+ // Time of last hit.
+ //
+
+ time_t last_;
+
+ //
+ // This is the number of cache hits
+ // registered for the object.
+ //
+
+ short int hits_;
+
+ //
+ // This is used to mark messages
+ // that have been split.
+ //
+
+ short int locks_;
+
+ //
+ // This is the MD5 checksum.
+ //
+
+ md5_byte_t *md5_digest_;
+
+ //
+ // Keep a reference counter
+ // of allocated objects.
+ //
+
+ #ifdef REFERENCES
+
+ static int references_;
+
+ #endif
+};
+
+//
+// Repository of messages.
+//
+
+class MessageStore
+{
+ public:
+
+ //
+ // Enable or disable cache of messages in store.
+ //
+
+ int enableCache;
+
+ //
+ // Does message have a distinct data part.
+ //
+
+ int enableData;
+
+ //
+ // Enable or disable split of data part.
+ //
+
+ int enableSplit;
+
+ //
+ // Enable or disable compression of data part.
+ //
+
+ int enableCompress;
+
+ //
+ // Set starting point of data part in the message.
+ //
+
+ int dataOffset;
+
+ //
+ // Set maximum size for the data part of each message.
+ //
+
+ int dataLimit;
+
+ //
+ // Set maximum elements in cache.
+ //
+
+ int cacheSlots;
+
+ //
+ // Set the percentage of total cache memory which
+ // a given type of message is allowed to occupy.
+ // When threshold is exceeded store is cleaned to
+ // make room for a new message of the same type.
+ //
+
+ int cacheThreshold;
+
+ //
+ // Don't clean the store if percentage of cache
+ // memory occupied by messages of this type is
+ // below the threshold.
+ //
+
+ int cacheLowerThreshold;
+
+ //
+ // Last operation performed on cache.
+ //
+
+ T_store_action lastAction;
+
+ //
+ // Position of last element stored in cache.
+ //
+
+ short int lastAdded;
+
+ //
+ // Positions of last element found in cache.
+ //
+
+ short int lastHit;
+
+ //
+ // Position of last element erased.
+ //
+
+ short int lastRemoved;
+
+ //
+ // Used to encode the the action to
+ // perform on the store and the slot
+ // involved.
+ //
+
+ ActionCache lastActionCache;
+
+ //
+ // Used in old protocol versions.
+ //
+
+ ActionCacheCompat lastActionCacheCompat;
+
+ PositionCacheCompat lastAddedCacheCompat;
+ PositionCacheCompat lastHitCacheCompat;
+ PositionCacheCompat lastRemovedCacheCompat;
+
+ //
+ // Position in cache where next insertion
+ // is going to take place.
+ //
+
+ short int lastRated;
+
+ //
+ // Size of data part of last split message
+ // once compressed. This is used only for
+ // compatibility with older proxies.
+ //
+
+ int lastResize;
+
+ //
+ // Constructors and destructors.
+ //
+
+ public:
+
+ MessageStore(StaticCompressor *compressor = NULL);
+
+ virtual ~MessageStore();
+
+ virtual const char *name() const = 0;
+
+ virtual unsigned char opcode() const = 0;
+
+ virtual unsigned int storage() const = 0;
+
+ //
+ // These are members that must be specialized.
+ //
+
+ public:
+
+ virtual Message *create() const = 0;
+
+ virtual Message *create(const Message &message) const = 0;
+
+ virtual void destroy(Message *message) const = 0;
+
+ void validateSize(int size)
+ {
+ if (size < control -> MinimumMessageSize ||
+ size > control -> MaximumMessageSize)
+ {
+ *logofs << name() << ": PANIC! Invalid size " << size
+ << " for message.\n" << logofs_flush;
+
+ cerr << "Error" << ": Invalid size " << size
+ << " for message opcode " << opcode() << ".\n";
+
+ HandleAbort();
+ }
+ }
+
+ void validateSize(int dataSize, int compressedDataSize)
+ {
+ if (dataSize < 0 || dataSize > control ->
+ MaximumMessageSize - 4 || compressedDataSize < 0 ||
+ compressedDataSize >= dataSize)
+ {
+ *logofs << name() << ": PANIC! Invalid data size "
+ << dataSize << " and compressed data size "
+ << compressedDataSize << " for message.\n"
+ << logofs_flush;
+
+ cerr << "Error" << ": Invalid data size "
+ << dataSize << " and compressed data size "
+ << compressedDataSize << " for message "
+ << "opcode " << (unsigned) opcode() << ".\n";
+
+ HandleAbort();
+ }
+ }
+
+ //
+ // Determine if the message can be stored
+ // in the cache.
+ //
+
+ virtual int validateMessage(const unsigned char *buffer, int size)
+ {
+ return (size >= control -> MinimumMessageSize &&
+ size <= control -> MaximumMessageSize);
+ }
+
+ //
+ // Get data offset based on major and minor
+ // opcode of the message.
+ //
+
+ virtual int identitySize(const unsigned char *buffer, unsigned int size)
+ {
+ return dataOffset;
+ }
+
+ //
+ // Encode identity and data using the
+ // specific message encoding.
+ //
+ // Some messages do not implement these
+ // methods because the encoding is done
+ // directly in the channel loop. Should
+ // move the encoding methods in in the
+ // message classes.
+ //
+
+ virtual int encodeIdentity(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
+ unsigned int size, int bigEndian,
+ ChannelCache *channelCache) const
+ {
+ return 1;
+ }
+
+ virtual int decodeIdentity(DecodeBuffer &decodeBuffer, unsigned char *&buffer,
+ unsigned int &size, int bigEndian, WriteBuffer *writeBuffer,
+ ChannelCache *channelCache) const
+ {
+ return 1;
+ }
+
+ //
+ // Encode differences between message
+ // in cache and the one to be encoded.
+ //
+
+ virtual void updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
+ const Message *cachedMessage, ChannelCache *channelCache) const
+ {
+ }
+
+ //
+ // Decode differences and update the
+ // cached version of the same message.
+ //
+
+ virtual void updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
+ ChannelCache *channelCache) const
+ {
+ }
+
+ //
+ // Post process the message information
+ // contained in the store by either up-
+ // dating the size record or the actual
+ // data part once the message has been
+ // completely sent to our peer.
+ //
+
+ void updateData(const int position, unsigned int dataSize,
+ unsigned int compressedDataSize);
+
+ void updateData(const T_checksum checksum, unsigned int compressedDataSize);
+
+ void updateData(const int position, const unsigned char *newData,
+ unsigned int dataSize, unsigned int compressedDataSize);
+
+ //
+ // These members, used internally
+ // in the message store class, are
+ // mandatory.
+ //
+
+ protected:
+
+ virtual int parseIdentity(Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const = 0;
+
+ virtual int unparseIdentity(const Message *message, unsigned char *buffer,
+ unsigned int size, int bigEndian) const = 0;
+
+ virtual void identityChecksum(const Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const = 0;
+
+ virtual void dumpIdentity(const Message *message) const = 0;
+
+ //
+ // Design should preserve these from being
+ // virtual.
+ //
+
+ int parseData(Message *message, int split, const unsigned char *buffer,
+ unsigned int size, T_checksum_action checksumAction,
+ T_data_action dataAction, int bigEndian);
+
+ int parseData(Message *message, const unsigned char *buffer,
+ unsigned int size, const unsigned char *compressedData,
+ const unsigned int compressedDataSize, T_checksum_action checksumAction,
+ T_data_action dataAction, int bigEndian);
+
+ int unparseData(const Message *message, unsigned char *buffer,
+ unsigned int size, int bigEndian);
+
+ //
+ // Manage efficient allocation of messages
+ // in the heap.
+ //
+
+ void recycle(Message *message)
+ {
+ #ifdef TEST
+
+ if (message == NULL)
+ {
+ *logofs << name() << ": PANIC! Cannot recycle a null message.\n"
+ << logofs_flush;
+
+ cerr << "Error" << ": Cannot recycle a null message.\n";
+
+ HandleAbort();
+ }
+
+ #endif
+
+ if (temporary_ == NULL)
+ {
+ //
+ // Be careful when reusing the message as
+ // it can contain valid data that must be
+ // explicitly deallocated if not needed.
+ // Note also that you cannot count on the
+ // initialization made in costructor.
+ //
+
+ temporary_ = message;
+ }
+ else
+ {
+ destroy(message);
+ }
+ }
+
+ void beginChecksum(Message *message)
+ {
+ if (message -> md5_digest_ == NULL)
+ {
+ message -> md5_digest_ = new md5_byte_t[MD5_LENGTH];
+
+ #ifdef DEBUG
+ *logofs << name() << ": Created MD5 digest structure "
+ << "for object at " << message << ".\n"
+ << logofs_flush;
+ #endif
+ }
+ #ifdef DEBUG
+ else
+ {
+ *logofs << name() << ": Using existing MD5 digest structure "
+ << "for object at " << message << ".\n"
+ << logofs_flush;
+ }
+ #endif
+
+ #ifdef DEBUG
+ *logofs << name() << ": Prepared MD5 digest for object at "
+ << message << ".\n" << logofs_flush;
+ #endif
+
+ md5_init(md5_state_);
+ }
+
+ void endChecksum(Message *message)
+ {
+ md5_finish(md5_state_, message -> md5_digest_);
+
+ #ifdef DEBUG
+ *logofs << name() << ": Calculated checksum for object at "
+ << message << ".\n" << logofs_flush;
+ #endif
+ }
+
+ void dataChecksum(Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian)
+ {
+ //
+ // Messages that have a data part starting
+ // at an offset possibly beyond the end of
+ // the message, must include the size in
+ // the identity checksum.
+ //
+
+ if ((int) size > message -> i_size_)
+ {
+ md5_append(md5_state_, buffer + message -> i_size_,
+ size - message -> i_size_);
+ }
+ }
+
+ //
+ // Repository handling methods.
+ //
+
+ public:
+
+ //
+ // Extract identity and data from buffer.
+ // The size field will be updated at the
+ // time of data parsing.
+ //
+
+ int parse(Message *message, int split, const unsigned char *buffer, unsigned int size,
+ T_checksum_action checksumAction, T_data_action dataAction, int bigEndian);
+
+ int parse(Message *message, const unsigned char *buffer, unsigned int size,
+ const unsigned char *compressedData, const unsigned int compressedDataSize,
+ T_checksum_action checksumAction, T_data_action dataAction, int bigEndian);
+
+ //
+ // From identity and data write the
+ // final message to the raw buffer.
+ //
+
+ int unparse(const Message *message, unsigned char *buffer,
+ unsigned int size, int bigEndian)
+ {
+ return (unparseData(message, buffer, size, bigEndian) &&
+ unparseIdentity(message, buffer, size, bigEndian));
+ }
+
+ void dump(const Message *message) const
+ {
+ dumpIdentity(message);
+
+ dumpData(message);
+ }
+
+ void dumpData(const Message *message) const;
+
+ //
+ // This returns the original message size as it
+ // was received on the link. It takes in account
+ // the data part, regardless data is still stored
+ // in the message object. This information will
+ // be used at the time message is unparsed.
+ //
+
+ int plainSize(const int position) const
+ {
+ return (*messages_)[position] -> size_;
+ }
+
+ //
+ // This returns either the size of identity plus
+ // the compressed data part or 0 if message is
+ // stored in uncompressed format.
+ //
+
+ int compressedSize(const int position) const
+ {
+ return (*messages_)[position] -> c_size_;
+ }
+
+ //
+ // Returns a pointer to message
+ // given its position in cache.
+ //
+
+ Message *get(const int position) const
+ {
+ if (position < 0 || position >= cacheSlots)
+ {
+ #ifdef PANIC
+ *logofs << name() << ": PANIC! Requested position "
+ << position << " is not inside the "
+ << "container.\n" << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Requested position "
+ << position << " is not inside the"
+ << "container.\n";
+
+ HandleAbort();
+ }
+ else if ((*messages_)[position] == NULL)
+ {
+ #ifdef PANIC
+ *logofs << name() << ": PANIC! Message at position "
+ << position << " is NULL.\n"
+ << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Message at position "
+ << position << " is NULL.\n";
+
+ HandleAbort();
+ }
+
+ return (*messages_)[position];
+ }
+
+ //
+ // This is the method called at encoding
+ // side to add a message to cache.
+ //
+
+ int findOrAdd(Message *message, T_checksum_action checksumAction,
+ T_data_action dataAction, int &added, int &locked);
+
+ //
+ // Utility interfaces to message insertion
+ // and deletion.
+ //
+
+ int add(Message *message, const int position,
+ T_checksum_action checksumAction, T_data_action dataAction);
+
+ int remove(const int position, T_checksum_action checksumAction,
+ T_data_action dataAction);
+
+ //
+ // Make space in the repository by remove
+ // the first suitable message object.
+ //
+
+ int clean(T_checksum_action checksumAction);
+
+ //
+ // Increase or decrease the "rating" of
+ // the message object.
+ //
+
+ int touch(Message *message) const;
+ int untouch(Message *message) const;
+
+ int getTouches(const int position) const
+ {
+ Message *message = (*messages_)[position];
+
+ if (message == NULL)
+ {
+ return 0;
+ }
+
+ return message -> hits_;
+ }
+
+ //
+ // Gives a 'weight' to the cached message. A zero
+ // value means object can be safely removed. A value
+ // greater than zero means it is advisable to retain
+ // the object. A negative result means it is mandato-
+ // ry to keep object in cache.
+ //
+
+ int getRating(Message *message, T_rating type) const;
+
+ //
+ // Increase or decrease locks of message at given
+ // position. A locked message will not be removed
+ // from the message store until the lock counter
+ // is zero.
+ //
+
+ int lock(const int position) const;
+ int unlock(const int position) const;
+
+ int getLocks(const int position) const
+ {
+ Message *message = (*messages_)[position];
+
+ if (message == NULL)
+ {
+ return 0;
+ }
+
+ return message -> locks_;
+ }
+
+ T_checksum const getChecksum(const int position) const
+ {
+ return getChecksum(get(position));
+ }
+
+ T_checksum const getChecksum(const Message *message) const
+ {
+ if (message -> md5_digest_ == NULL)
+ {
+ #ifdef PANIC
+ *logofs << name() << ": PANIC! Checksum not initialized "
+ << "for object at " << message << ".\n"
+ << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Checksum not initialized "
+ << "for object at " << message << ".\n";
+
+ HandleAbort();
+ }
+
+ #ifdef DEBUG
+ *logofs << name() << ": Got checksum for object at "
+ << message << ".\n" << logofs_flush;
+ #endif
+
+ return message -> md5_digest_;
+ }
+
+ //
+ // Calculate the checksum on the fly based the
+ // opcode in the buffer. Useful in the case a
+ // message was not processed or was not stored
+ // in the cache. The returned checksum must be
+ // explicitly deallocated by the caller, after
+ // use.
+ //
+
+ T_checksum getChecksum(const unsigned char *buffer,
+ unsigned int size, int bigEndian);
+
+ const unsigned char *getData(const Message *message) const
+ {
+ return message -> data_.begin();
+ }
+
+ int plainSize(const Message *message) const
+ {
+ return message -> size_;
+ }
+
+ int identitySize(Message *message)
+ {
+ return message -> i_size_;
+ }
+
+ int compressedSize(const Message *message) const
+ {
+ return message -> c_size_;
+ }
+
+ Message *getTemporary()
+ {
+ if (temporary_ == NULL)
+ {
+ temporary_ = create();
+ }
+
+ return temporary_;
+ }
+
+ void resetTemporary()
+ {
+ temporary_ = NULL;
+ }
+
+ //
+ // On side where we don't have checksums, we
+ // count how many messages are in the array.
+ // This is obviously expensive and should be
+ // only performed when reporting statistics.
+ //
+
+ int getSize() const
+ {
+ int size = checksums_ -> size();
+
+ if (size == 0)
+ {
+ for (int i = 0; i < cacheSlots; i++)
+ {
+ if ((*messages_)[i] != NULL)
+ {
+ size++;
+ }
+ }
+ }
+
+ return size;
+ }
+
+ int getLocalStorageSize() const
+ {
+ return localStorageSize_;
+ }
+
+ int getRemoteStorageSize() const
+ {
+ return remoteStorageSize_;
+ }
+
+ int getLocalTotalStorageSize() const
+ {
+ return totalLocalStorageSize_;
+ }
+
+ int getRemoteTotalStorageSize() const
+ {
+ return totalRemoteStorageSize_;
+ }
+
+ static int getCumulativeTotalStorageSize()
+ {
+ return (totalLocalStorageSize_ > totalRemoteStorageSize_ ?
+ totalLocalStorageSize_ : totalRemoteStorageSize_);
+ }
+
+ int saveStore(ostream *cachefs, md5_state_t *md5_state_stream,
+ md5_state_t *md5_state_client, T_checksum_action checksumAction,
+ T_data_action dataAction, int bigEndian);
+
+ int loadStore(istream *cachefs, md5_state_t *md5_state_stream,
+ T_checksum_action checksumAction, T_data_action dataAction,
+ int bigEndian);
+
+ protected:
+
+ //
+ // Estimate the memory requirements of given
+ // instance of message. Size includes memory
+ // allocated from heap to store checksum and
+ // data.
+ //
+
+ void storageSize(const Message *message, unsigned int &local,
+ unsigned int &remote) const;
+
+ //
+ // Just used for debug.
+ //
+
+ void printStorageSize();
+
+ //
+ // Repositories where to save cached messages.
+ // First is a vector of pointers, the second
+ // is a hash table used for fast lookups.
+ //
+
+ T_messages *messages_;
+ T_checksums *checksums_;
+
+ //
+ // A message object to be used as a temporary.
+ // Reuse the temporary object if possible, if
+ // not, create a new instance.
+ //
+
+ Message *temporary_;
+
+ //
+ // Used to calculate message's checksum.
+ //
+
+ md5_state_t *md5_state_;
+
+ private:
+
+ //
+ // Used to compress data payload.
+ //
+
+ StaticCompressor *compressor_;
+
+ //
+ // Keep track of how many bytes
+ // are taken by cache.
+ //
+
+ int localStorageSize_;
+ int remoteStorageSize_;
+
+ static int totalLocalStorageSize_;
+ static int totalRemoteStorageSize_;
+
+ //
+ // Used to track object allocation and deallocation.
+ //
+
+ #ifdef REFERENCES
+
+ static int references_;
+
+ #endif
+};
+
+//
+// This is an ancillary class of the message
+// store, used to encode extensions based on
+// the minor opcode.
+//
+
+class MinorMessageStore
+{
+ public:
+
+ virtual ~MinorMessageStore()
+ {
+ }
+
+ virtual const char *name() const = 0;
+
+ virtual int identitySize(const unsigned char *buffer, unsigned int size) = 0;
+
+ virtual int encodeMessage(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
+ const unsigned int size, int bigEndian,
+ ChannelCache *channelCache) const
+ {
+ return 1;
+ }
+
+ virtual int decodeMessage(DecodeBuffer &decodeBuffer, unsigned char *&buffer,
+ unsigned int &size, unsigned char type, int bigEndian,
+ WriteBuffer *writeBuffer, ChannelCache *channelCache) const
+ {
+ return 1;
+ }
+
+ virtual void encodeData(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
+ unsigned int size, int bigEndian,
+ ChannelCache *channelCache) const
+ {
+ }
+
+ virtual void decodeData(DecodeBuffer &decodeBuffer, unsigned char *buffer,
+ unsigned int size, int bigEndian,
+ ChannelCache *channelCache) const
+ {
+ }
+
+ virtual int parseIdentity(Message *message, const unsigned char *buffer,
+ unsigned int size, int bigEndian) const = 0;
+
+ virtual int unparseIdentity(const Message *message, unsigned char *buffer,
+ unsigned int size, int bigEndian) const = 0;
+
+ virtual void updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
+ const Message *cachedMessage,
+ ChannelCache *channelCache) const
+ {
+ }
+
+ virtual void updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
+ ChannelCache *channelCache) const
+ {
+ }
+
+ virtual void identityChecksum(const Message *message, const unsigned char *buffer,
+ unsigned int size, md5_state_t *md5_state,
+ int bigEndian) const = 0;
+};
+
+#endif /* Message_H */
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-23 16:14:04 +0000