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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.
*/
#pragma once
#include <hicn/transport/interfaces/socket_options_default_values.h>
#include <hicn/transport/interfaces/statistics.h>
#include <hicn/transport/protocols/transport_algorithm.h>
#include <hicn/transport/utils/chrono_typedefs.h>
#include <protocols/congestion_window_protocol.h>
#include <protocols/raaqm_data_path.h>
#include <protocols/rate_estimation.h>
#include <array>
#include <queue>
#include <unordered_map>
#include <vector>
namespace transport {
namespace protocol {
class RaaqmTransportAlgorithm : public TransportAlgorithm,
public CWindowProtocol {
public:
// TODO: Add windows size and other beta/drop parameters
RaaqmTransportAlgorithm(interface::TransportStatistics *stats,
IcnRateEstimator *rate_estimator, double drop_factor,
double minimum_drop_probability, double gamma,
double beta, uint32_t sample_number,
uint32_t interest_lifetime, double beta_wifi,
double drop_wifi, double beta_lte, double drop_lte,
unsigned int wifi_delay, unsigned int lte_delay,
double max_window, double min_window);
~RaaqmTransportAlgorithm() override;
void reset() override;
uint32_t onContentObject(uint32_t suffix, uint32_t path_label) override;
uint32_t onInterestTimeout(uint32_t suffix) override;
void onInterestSent(uint32_t suffix) override;
void sessionEnd() override;
protected:
static constexpr uint32_t buffer_size =
1 << interface::default_values::log_2_default_buffer_size;
static constexpr uint16_t mask = buffer_size - 1;
using PathTable =
std::unordered_map<uint32_t, std::unique_ptr<RaaqmDataPath>>;
void increaseWindow() override;
void decreaseWindow() override;
virtual void updateStats(uint32_t suffix, uint64_t rtt,
utils::TimePoint &now);
private:
void init();
void updateRtt(uint32_t suffix);
void RAAQM();
void updatePathTable(uint32_t path_label);
void checkDropProbability();
void checkForStalePaths();
protected:
// Congestion window management
double current_window_size_;
// Protocol management
uint64_t interests_in_flight_;
std::array<utils::TimePoint, buffer_size> interest_timepoints_;
private:
/**
* Current download path
*/
RaaqmDataPath *cur_path_;
/**
* Hash table for path: each entry is a pair path ID(key) - path object
*/
PathTable path_table_;
// for rate-estimation at packet level
IcnRateEstimator *rate_estimator_;
interface::TransportStatistics *stats_;
bool set_interest_filter_;
// Params
double drop_factor_;
double minimum_drop_probability_;
double gamma_;
double beta_;
uint32_t sample_number_;
uint32_t interest_lifetime_;
bool raaqm_autotune_;
double beta_wifi_;
double drop_wifi_;
double beta_lte_;
double drop_lte_;
unsigned int wifi_delay_;
unsigned int lte_delay_;
double max_window_;
double min_window_;
};
} // end namespace protocol
} // end namespace transport
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