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/// @file
/// @author rfree (current maintainer in monero.cc project)
/// @brief interface for throttling of connection (count and rate-limit speed etc)
// Copyright (c) 2014-2022, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/* rfree: throttle basic interface */
/* rfree: also includes the manager for singeton/global such objects */
#ifndef INCLUDED_network_throttle_hpp
#define INCLUDED_network_throttle_hpp
#include <boost/asio.hpp>
#include <string>
#include <vector>
#include <boost/noncopyable.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/array.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <boost/thread/thread.hpp>
#include "syncobj.h"
#include "net/net_utils_base.h"
#include "misc_log_ex.h"
#include <boost/lambda/bind.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/uuid/random_generator.hpp>
#include <boost/chrono.hpp>
#include <boost/utility/value_init.hpp>
#include <boost/asio/deadline_timer.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include "misc_language.h"
#include "pragma_comp_defs.h"
#include <sstream>
#include <iomanip>
#include <algorithm>
#include <memory>
#include <mutex>
#include <fstream>
namespace epee
{
namespace net_utils
{
// just typedefs to in code define the units used. TODO later it will be enforced that casts to other numericals are only explicit to avoid mistakes? use boost::chrono?
typedef double network_speed_kbps; // externally, for parameters and return values, all defined in kilobytes per second
typedef double network_speed_bps; // throttle-internally, bytes per second
typedef double network_time_seconds;
typedef double network_MB;
class i_network_throttle;
/***
@brief All information about given throttle - speed calculations
*/
struct calculate_times_struct {
double average;
double window;
double delay;
double recomendetDataSize;
};
typedef calculate_times_struct calculate_times_struct;
/***
@brief Access to simple throttles, with singlton to access global network limits
*/
class network_throttle_manager {
// provides global (singleton) in/inreq/out throttle access
// [[note1]] see also http://www.nuonsoft.com/blog/2012/10/21/implementing-a-thread-safe-singleton-with-c11/
// [[note2]] _inreq is the requested in traffic - we anticipate we will get in-bound traffic soon as result of what we do (e.g. that we sent network downloads requests)
//protected:
public: // XXX
static boost::mutex m_lock_get_global_throttle_in;
static boost::mutex m_lock_get_global_throttle_inreq;
static boost::mutex m_lock_get_global_throttle_out;
friend class connection_basic; // FRIEND - to directly access global throttle-s. !! REMEMBER TO USE LOCKS!
friend class connection_basic_pimpl; // ditto
public:
static i_network_throttle & get_global_throttle_in(); ///< singleton ; for friend class ; caller MUST use proper locks! like m_lock_get_global_throttle_in
static i_network_throttle & get_global_throttle_inreq(); ///< ditto ; use lock ... use m_lock_get_global_throttle_inreq obviously
static i_network_throttle & get_global_throttle_out(); ///< ditto ; use lock ... use m_lock_get_global_throttle_out obviously
};
/***
@brief interface for the throttle, see the derivated class
*/
class i_network_throttle {
public:
virtual void set_name(const std::string &name)=0;
virtual void set_target_speed( network_speed_kbps target )=0;
virtual network_speed_kbps get_target_speed()=0;
virtual void handle_trafic_exact(size_t packet_size) =0; // count the new traffic/packet; the size is exact considering all network costs
virtual void handle_trafic_tcp(size_t packet_size) =0; // count the new traffic/packet; the size is as TCP, we will consider MTU etc
virtual void tick() =0; // poke and update timers/history
// time calculations:
virtual void calculate_times(size_t packet_size, calculate_times_struct &cts, bool dbg, double force_window) const =0; // assuming sending new package (or 0), calculate:
// Average, Window, Delay, Recommended data size ; also gets dbg=debug flag, and forced widnow size if >0 or -1 for not forcing window size
// Average speed, Window size, recommended Delay to sleep now, Recommended size of data to send now
virtual network_time_seconds get_sleep_time(size_t packet_size) const =0; // gets the D (recommended Delay time) from calc
virtual network_time_seconds get_sleep_time_after_tick(size_t packet_size) =0; // ditto, but first tick the timer
virtual size_t get_recommended_size_of_planned_transport() const =0; // what should be the recommended limit of data size that we can transport over current network_throttle in near future
virtual double get_time_seconds() const =0; // a timer
virtual void logger_handle_net(const std::string &filename, double time, size_t size)=0;
virtual void get_stats(uint64_t &total_packets, uint64_t &total_bytes) const =0;
};
// ... more in the -advanced.h file
} // namespace net_utils
} // namespace epee
#endif
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