From f76c82403888bb498973ec974dbfd20e4edb02fe Mon Sep 17 00:00:00 2001 From: Mike Gabriel Date: Fri, 30 Jun 2017 20:13:51 +0200 Subject: nxcomp: Switch to autoreconf. --- nxcomp/Transport.h | 577 ----------------------------------------------------- 1 file changed, 577 deletions(-) delete mode 100644 nxcomp/Transport.h (limited to 'nxcomp/Transport.h') diff --git a/nxcomp/Transport.h b/nxcomp/Transport.h deleted file mode 100644 index 047396af6..000000000 --- a/nxcomp/Transport.h +++ /dev/null @@ -1,577 +0,0 @@ -/**************************************************************************/ -/* */ -/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com) */ -/* Copyright (c) 2008-2014 Oleksandr Shneyder */ -/* Copyright (c) 2014-2016 Ulrich Sibiller */ -/* Copyright (c) 2014-2016 Mihai Moldovan */ -/* Copyright (c) 2011-2016 Mike Gabriel */ -/* 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. */ -/* */ -/**************************************************************************/ - -#ifndef Transport_H -#define Transport_H - -#include -#include - -#include -#include -#include - -#include "Misc.h" -#include "Control.h" - -#include "Types.h" -#include "Timestamp.h" -#include "Socket.h" - -// -// Set the verbosity level. -// - -#define PANIC -#define WARNING -#undef TEST -#undef DEBUG - -// -// Define this to lock and unlock the -// memory-to-memory transport buffers -// before they are accessed. The code -// is outdated and doesn't work with -// the current pthread library. -// - -#undef THREADS - -// -// Define this to know when a socket -// is created or destroyed. -// - -#undef REFERENCES - -// -// Size of buffer if not set by user. -// - -#define TRANSPORT_BUFFER_DEFAULT_SIZE 16384 - -// -// Type of transport. -// - -typedef enum -{ - transport_base, - transport_proxy, - transport_agent, - transport_last_tag - -} T_transport_type; - -// -// This class handles the buffered I/O on -// the network sockets. -// - -// -// TODO: This class is useful but adds a lot of -// overhead. There are many improvements we can -// make here: -// -// - There should be a generic Buffer class, ac- -// comodating a list of memory buffers. This -// would enable the use of the readv() and -// writev() functions to perform the I/O on -// the socket. -// -// - The buffering should be moved to the Write- -// Buffer and ReadBuffer classes. By performing -// the buffering here and there, we are dupli- -// cating a lot of code and are adding a lot -// of useless memory copies. -// -// - Stream compression should be removed. The -// proxy should compress the frames based on -// the type and should include the length of -// the decompressed data in the header of the -// packet. Besides avoiding the compression -// of packets that cannot be reduced in size, -// we would also save the additional memory -// allocations due to the fact that we don't -// know the size of the decode buffer at the -// time we read the packet from the network. -// -// - The other utilities implemented here, like -// the functions forcing a write on the socket -// or waiting for more data to become available -// should be moved to the Proxy or the Channel -// classes. -// - -class Transport -{ - public: - - // - // Member functions. - // - - Transport(int fd); - - virtual ~Transport(); - - int fd() const - { - return fd_; - } - - T_transport_type getType() - { - return type_; - } - - // - // Virtual members redefined by proxy - // and 'memory-to-memory' I/O layers. - // - - virtual int read(unsigned char *data, unsigned int size); - - virtual int write(T_write type, const unsigned char *data, const unsigned int size); - - virtual int flush(); - - virtual int drain(int limit, int timeout); - - virtual void finish() - { - fullReset(); - - finish_ = 1; - } - - virtual int length() const - { - return w_buffer_.length_; - } - - virtual int pending() const - { - return 0; - } - - virtual int readable() const - { - return GetBytesReadable(fd_); - } - - virtual int writable() const - { - return GetBytesWritable(fd_); - } - - virtual int queued() const - { - return GetBytesQueued(fd_); - } - - virtual int flushable() const - { - return 0; - } - - virtual int wait(int timeout) const; - - void setSize(unsigned int initialSize, - unsigned int thresholdSize, - unsigned int maximumSize); - - // - // Return a pointer to the data - // in the read buffer. - // - - virtual unsigned int getPending(unsigned char *&data) - { - data = NULL; - - return 0; - } - - virtual void pendingReset() - { - } - - virtual void partialReset() - { - partialReset(w_buffer_); - } - - virtual void fullReset(); - - int blocked() const - { - return blocked_; - } - - protected: - - // - // Make room in the buffer to accommodate - // at least size bytes. - // - - int resize(T_buffer &buffer, const int &size); - - void partialReset(T_buffer &buffer) - { - if (buffer.length_ == 0 && - (buffer.data_.size() > initialSize_ || - buffer.data_.capacity() > initialSize_)) - { - fullReset(buffer); - } - } - - void fullReset(T_buffer &buffer); - - // - // Data members. - // - - int fd_; - - int blocked_; - int finish_; - - T_buffer w_buffer_; - - unsigned int initialSize_; - unsigned int thresholdSize_; - unsigned int maximumSize_; - - T_transport_type type_; - - private: - - #ifdef REFERENCES - - static int references_; - - #endif -}; - -// -// This class handles buffered I/O and -// compression of the proxy stream. -// - -class ProxyTransport : public Transport -{ - public: - - ProxyTransport(int fd); - - virtual ~ProxyTransport(); - - virtual int read(unsigned char *data, unsigned int size); - - virtual int write(T_write type, const unsigned char *data, const unsigned int size); - - virtual int flush(); - - // - // Same as in the base class. - // - // virtual int drain(int limit, int timeout); - // - // virtual void finish(); - // - - // - // Same as in the base class. - // - // virtual int length() const - // - - virtual int pending() const - { - return r_buffer_.length_; - } - - // - // Same as in the base class. - // - // virtual int readable() const; - // - // virtual int writable() const; - // - // virtual int queued() const; - // - - virtual int flushable() const - { - return flush_; - } - - // - // Same as in the base class, but - // should not be called. - // - // int drained() const; - // - // Same as in the base class. - // - // virtual int wait(int timeout) const; - // - // Same as in the base class. - // - // void setSize(unsigned int initialSize, - // unsigned int thresholdSize, - // unsigned int maximumSize); - // - - virtual unsigned int getPending(unsigned char *&data); - - virtual void pendingReset() - { - owner_ = 1; - } - - virtual void partialReset() - { - if (owner_ == 1) - { - Transport::partialReset(r_buffer_); - } - - Transport::partialReset(w_buffer_); - } - - virtual void fullReset(); - - // - // Same as in the base class. - // - // int blocked() const; - // - - protected: - - int flush_; - int owner_; - - T_buffer r_buffer_; - - z_stream r_stream_; - z_stream w_stream_; - - private: - - #ifdef REFERENCES - - static int references_; - - #endif -}; - -// -// Handle memory-to-memory data transfers between -// an agent and the proxy. -// - -class AgentTransport : public Transport -{ - public: - - AgentTransport(int fd); - - virtual ~AgentTransport(); - - virtual int read(unsigned char *data, unsigned int size); - - virtual int write(T_write type, const unsigned char *data, const unsigned int size); - - // - // These two should never be called. - // - - virtual int flush(); - - virtual int drain(int limit, int timeout); - - // - // Same as in the base class. - // - // virtual void finish(); - // - - // - // Same as in the base class. - // - // virtual int length() const - // - - virtual int pending() const - { - return r_buffer_.length_; - } - - // - // These are intended to operate only - // on the internal buffers. - // - - virtual int readable() const - { - return r_buffer_.length_; - } - - virtual int writable() const - { - return control -> TransportMaximumBufferSize; - } - - virtual int queued() const - { - return 0; - } - - // - // Same as in the base class. - // - // virtual int flushable() const; - // - // Same as in the base class, but - // should not be called. - // - // int drained() const; - // - - // - // Return immediately or will - // block until the timeout. - // - - virtual int wait(int timeout) const - { - return 0; - } - - // - // Same as in the base class. - // - // void setSize(unsigned int initialSize, - // unsigned int thresholdSize, - // unsigned int maximumSize); - // - - virtual unsigned int getPending(unsigned char *&data); - - virtual void pendingReset() - { - owner_ = 1; - } - - virtual void partialReset() - { - if (owner_ == 1) - { - Transport::partialReset(r_buffer_); - } - - Transport::partialReset(w_buffer_); - } - - virtual void fullReset(); - - // - // Same as in the base class. - // - // int blocked() const; - // - - // - // The following are specific of the - // memory-to-memory transport. - // - - int enqueue(const char *data, const int size); - - int dequeue(char *data, int size); - - int queuable() - { - // - // Always allow the agent to enqueue - // more data. - // - - return control -> TransportMaximumBufferSize; - } - - int dequeuable(); - - protected: - - // - // Lock the buffer to handle reads and - // writes safely. - // - - #ifdef THREADS - - int lockRead(); - int lockWrite(); - - int unlockRead(); - int unlockWrite(); - - #endif - - // - // Data members. - // - - int owner_; - - T_buffer r_buffer_; - - // - // Mutexes for safe read and write. - // - - #ifdef THREADS - - pthread_mutex_t m_read_; - pthread_mutex_t m_write_; - - #endif - - private: - - #ifdef REFERENCES - - static int references_; - - #endif -}; - -#endif /* Transport_H */ -- cgit v1.2.3