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/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hicn/transport/utils/chrono_typedefs.h>
#include <protocols/raaqm_data_path.h>
namespace transport {
namespace protocol {
RaaqmDataPath::RaaqmDataPath(double drop_factor,
double minimum_drop_probability,
unsigned new_timer, unsigned int samples,
const utils::SteadyTime::Milliseconds &new_rtt,
const utils::SteadyTime::Milliseconds &new_rtt_min,
const utils::SteadyTime::Milliseconds &new_rtt_max,
unsigned new_pd)
: drop_factor_(drop_factor),
minimum_drop_probability_(minimum_drop_probability),
timer_(new_timer),
samples_(samples),
rtt_(new_rtt.count()),
rtt_min_(new_rtt_min.count()),
rtt_max_(new_rtt_max.count()),
prop_delay_(new_pd),
new_prop_delay_(false),
drop_prob_(0),
packets_received_(0),
last_packets_received_(0),
m_packets_bytes_received_(0),
last_packets_bytes_received_(0),
raw_data_bytes_received_(0),
last_raw_data_bytes_received_(0),
rtt_samples_(samples_),
last_received_pkt_(utils::SteadyTime::Clock::now()),
average_rtt_(0),
alpha_(ALPHA) {}
RaaqmDataPath &RaaqmDataPath::insertNewRtt(
const utils::SteadyTime::Milliseconds &new_rtt,
const utils::SteadyTime::TimePoint &now) {
rtt_ = new_rtt.count();
rtt_samples_.pushBack(rtt_);
rtt_max_ = rtt_samples_.rBegin();
rtt_min_ = rtt_samples_.begin();
if (rtt_min_ < prop_delay_) {
new_prop_delay_ = true;
prop_delay_ = rtt_min_;
}
last_received_pkt_ = now;
return *this;
}
RaaqmDataPath &RaaqmDataPath::updateReceivedStats(std::size_t packet_size,
std::size_t data_size) {
packets_received_++;
m_packets_bytes_received_ += packet_size;
raw_data_bytes_received_ += data_size;
return *this;
}
double RaaqmDataPath::getDropFactor() { return drop_factor_; }
double RaaqmDataPath::getDropProb() { return drop_prob_; }
RaaqmDataPath &RaaqmDataPath::setDropProb(double dropProb) {
drop_prob_ = dropProb;
return *this;
}
double RaaqmDataPath::getMinimumDropProbability() {
return minimum_drop_probability_;
}
double RaaqmDataPath::getTimer() { return timer_; }
RaaqmDataPath &RaaqmDataPath::smoothTimer() {
timer_ = (1 - TIMEOUT_SMOOTHER) * timer_ +
(TIMEOUT_SMOOTHER)*rtt_ * (TIMEOUT_RATIO);
return *this;
}
double RaaqmDataPath::getRtt() { return (double)rtt_; }
double RaaqmDataPath::getAverageRtt() { return average_rtt_; }
double RaaqmDataPath::getRttMax() { return (double)rtt_max_; }
double RaaqmDataPath::getRttMin() { return (double)rtt_min_; }
unsigned RaaqmDataPath::getSampleValue() { return samples_; }
unsigned RaaqmDataPath::getRttQueueSize() {
return static_cast<unsigned>(rtt_samples_.size());
}
RaaqmDataPath &RaaqmDataPath::updateDropProb() {
drop_prob_ = 0.0;
if (getSampleValue() == getRttQueueSize()) {
if (rtt_max_ == rtt_min_) {
drop_prob_ = minimum_drop_probability_;
} else {
drop_prob_ = minimum_drop_probability_ +
drop_factor_ * (rtt_ - rtt_min_) / (rtt_max_ - rtt_min_);
}
}
return *this;
}
void RaaqmDataPath::setAlpha(double alpha) {
if (alpha >= 0 && alpha <= 1) {
alpha_ = alpha;
}
}
bool RaaqmDataPath::newPropagationDelayAvailable() {
bool r = new_prop_delay_;
new_prop_delay_ = false;
return r;
}
unsigned int RaaqmDataPath::getPropagationDelay() {
return (unsigned int)prop_delay_;
}
bool RaaqmDataPath::isStale() {
utils::SteadyTime::TimePoint now = utils::SteadyTime::Clock::now();
auto time = utils::SteadyTime::getDurationUs(last_received_pkt_, now).count();
if (time > 2000000) {
return true;
}
return false;
}
} // end namespace protocol
} // end namespace transport
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