126 lines
5.7 KiB
C++
126 lines
5.7 KiB
C++
/// @file
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/// @author rfree (current maintainer in monero.cc project)
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/// @brief implementaion for throttling of connection (count and rate-limit speed etc)
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// Copyright (c) 2014-2017, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/* rfree: throttle details, implementing rate limiting */
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#ifndef INCLUDED_throttle_detail_hpp
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#define INCLUDED_throttle_detail_hpp
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#include "network_throttle.hpp"
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namespace epee
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{
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namespace net_utils
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{
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class network_throttle : public i_network_throttle {
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private:
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struct packet_info {
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size_t m_size; // octets sent. Summary for given small-window (e.g. for all packaged in 1 second)
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packet_info();
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};
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network_speed_bps m_target_speed;
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size_t m_network_add_cost; // estimated add cost of headers
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size_t m_network_minimal_segment; // estimated minimal cost of sending 1 byte to round up to
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size_t m_network_max_segment; // recommended max size of 1 TCP transmission
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const size_t m_window_size; // the number of samples to average over
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network_time_seconds m_slot_size; // the size of one slot. TODO: now hardcoded for 1 second e.g. in time_to_slot()
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// TODO for big window size, for performance better the substract on change of m_last_sample_time instead of recalculating average of eg >100 elements
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std::vector< packet_info > m_history; // the history of bw usage
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network_time_seconds m_last_sample_time; // time of last history[0] - so we know when to rotate the buffer
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network_time_seconds m_start_time; // when we were created
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bool m_any_packet_yet; // did we yet got any packet to count
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std::string m_name; // my name for debug and logs
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std::string m_nameshort; // my name for debug and logs (used in log file name)
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// each sample is now 1 second
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public:
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network_throttle(const std::string &nameshort, const std::string &name, int window_size=-1);
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virtual ~network_throttle();
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virtual void set_name(const std::string &name);
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virtual void set_target_speed( network_speed_kbps target );
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virtual network_speed_kbps get_target_speed();
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// add information about events:
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virtual void handle_trafic_exact(size_t packet_size); ///< count the new traffic/packet; the size is exact considering all network costs
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virtual void handle_trafic_tcp(size_t packet_size); ///< count the new traffic/packet; the size is as TCP, we will consider MTU etc
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virtual void tick(); ///< poke and update timers/history (recalculates, moves the history if needed, checks the real clock etc)
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virtual double get_time_seconds() const ; ///< timer that we use, time in seconds, monotionic
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// time calculations:
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virtual void calculate_times(size_t packet_size, calculate_times_struct &cts, bool dbg, double force_window) const; ///< MAIN LOGIC (see base class for info)
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virtual network_time_seconds get_sleep_time_after_tick(size_t packet_size); ///< increase the timer if needed, and get the package size
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virtual network_time_seconds get_sleep_time(size_t packet_size) const; ///< gets the Delay (recommended Delay time) from calc. (not safe: only if time didnt change?) TODO
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virtual size_t get_recommended_size_of_planned_transport() const; ///< what should be the size (bytes) of next data block to be transported
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virtual size_t get_recommended_size_of_planned_transport_window(double force_window) const; ///< ditto, but for given windows time frame
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virtual double get_current_speed() const;
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private:
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virtual network_time_seconds time_to_slot(network_time_seconds t) const { return std::floor( t ); } // convert exact time eg 13.7 to rounded time for slot number in history 13
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virtual void _handle_trafic_exact(size_t packet_size, size_t orginal_size);
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virtual void logger_handle_net(const std::string &filename, double time, size_t size);
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};
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/***
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* The complete set of traffic throttle for one typical connection
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*/
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struct network_throttle_bw {
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public:
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network_throttle m_in; ///< for incomming traffic (this we can not controll directly as it depends of what others send to us - usually)
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network_throttle m_inreq; ///< for requesting incomming traffic (this is exact usually)
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network_throttle m_out; ///< for outgoing traffic that we just sent (this is exact usually)
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public:
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network_throttle_bw(const std::string &name1);
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};
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} // namespace net_utils
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} // namespace epee
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#endif
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