wip change ledbat and start cubic

solanaceae/ngc_ft1/cubic.cpp

@@ -0,0 +1,49 @@
+#include "./cubic.hpp"
+
+#include <cmath>
+#include <iostream>
+
+float CUBIC::getCWnD(void) const {
+	const double K = cbrt(
+		(_window_max * (1. - BETA)) / SCALING_CONSTANT
+	);
+
+	const double TK = _time_since_reduction - K;
+
+	const double cwnd =
+		SCALING_CONSTANT
+		* TK * TK * TK // TK^3
+		+ _window_max
+	;
+
+	std::cout << "K:" << K << " TK:" << TK << " cwnd:" << cwnd << " rtt:" << getCurrentDelay() << "\n";
+
+	return cwnd;
+}
+
+float CUBIC::getCurrentDelay(void) const {
+	return _rtt_ema;
+}
+
+void CUBIC::addRTT(float new_delay) {
+	// lerp(new_delay, rtt_ema, 0.1)
+	_rtt_ema = RTT_EMA_ALPHA * new_delay + (1.f - RTT_EMA_ALPHA) * _rtt_ema;
+}
+
+size_t CUBIC::canSend(void) const {
+	return 0;
+}
+
+std::vector<CUBIC::SeqIDType> CUBIC::getTimeouts(void) const {
+	return {};
+}
+
+void CUBIC::onSent(SeqIDType seq, size_t data_size) {
+}
+
+void CUBIC::onAck(std::vector<SeqIDType> seqs) {
+}
+
+void CUBIC::onLoss(SeqIDType seq, bool discard) {
+}
+