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-rw-r--r--libtransport/src/protocols/raaqm_data_path.cc158
1 files changed, 158 insertions, 0 deletions
diff --git a/libtransport/src/protocols/raaqm_data_path.cc b/libtransport/src/protocols/raaqm_data_path.cc
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+++ b/libtransport/src/protocols/raaqm_data_path.cc
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+/*
+ * Copyright (c) 2017-2019 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,
+ uint64_t new_rtt, uint64_t new_rtt_min,
+ uint64_t new_rtt_max, unsigned new_pd)
+
+ : drop_factor_(drop_factor),
+ minimum_drop_probability_(minimum_drop_probability),
+ timer_(new_timer),
+ samples_(samples),
+ rtt_(new_rtt),
+ rtt_min_(new_rtt_min),
+ rtt_max_(new_rtt_max),
+ 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::SteadyClock::now()),
+ average_rtt_(0),
+ alpha_(ALPHA) {}
+
+RaaqmDataPath &RaaqmDataPath::insertNewRtt(uint64_t new_rtt) {
+ rtt_ = new_rtt;
+ rtt_samples_.pushBack(new_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_ = utils::SteadyClock::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::TimePoint now = utils::SteadyClock::now();
+ auto time =
+ std::chrono::duration_cast<utils::Microseconds>(now - last_received_pkt_)
+ .count();
+ if (time > 2000000) {
+ return true;
+ }
+ return false;
+}
+
+} // end namespace protocol
+
+} // end namespace transport