62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
#pragma once
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#include "./flow_only.hpp"
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#include <chrono>
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struct CUBIC : public FlowOnly {
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//using clock = std::chrono::steady_clock;
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public: // config
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//static constexpr float BETA {0.7f};
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static constexpr float BETA {0.8f};
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static constexpr float SCALING_CONSTANT {0.4f};
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static constexpr float RTT_EMA_ALPHA = 0.1f; // 0.1 is very smooth, might need more
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private:
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// window size before last reduciton
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double _window_max {2.f * MAXIMUM_SEGMENT_SIZE}; // start with mss*2
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//double _window_last_max {2.f * MAXIMUM_SEGMENT_SIZE};
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double _time_since_reduction {12.f}; // warm start
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int64_t _bytes_leftover {0};
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private:
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void updateReductionTimer(float time_delta);
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void resetReductionTimer(void);
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float getCWnD(void) const;
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// moving avg over the last few delay samples
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// VERY sensitive to bundling acks
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//float getCurrentDelay(void) const;
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//void addRTT(float new_delay);
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void onCongestion(void) override;
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public: // api
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CUBIC(size_t maximum_segment_data_size) : FlowOnly(maximum_segment_data_size) {}
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virtual ~CUBIC(void) {}
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float getWindow(void) override;
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// TODO: api for how much data we should send
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// take time since last sent into account
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// respect max_byterate_allowed
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int64_t canSend(float time_delta) override;
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// get the list of timed out seq_ids
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//std::vector<SeqIDType> getTimeouts(void) const override;
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public: // callbacks
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// data size is without overhead
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//void onSent(SeqIDType seq, size_t data_size) override;
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//void onAck(std::vector<SeqIDType> seqs) override;
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// if discard, not resent, not inflight
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//void onLoss(SeqIDType seq, bool discard) override;
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};
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