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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.
*/
#pragma once
#include <hicn/transport/utils/chrono_typedefs.h>
#include <protocols/byte_stream_reassembly.h>
#include <protocols/congestion_window_protocol.h>
#include <protocols/raaqm_data_path.h>
#include <protocols/rate_estimation.h>
#include <protocols/transport_protocol.h>
#include <queue>
#include <random>
#include <vector>
namespace transport {
namespace protocol {
class RaaqmTransportProtocol : public TransportProtocol,
public CWindowProtocol {
public:
RaaqmTransportProtocol(implementation::ConsumerSocket *icn_socket);
~RaaqmTransportProtocol();
using TransportProtocol::start;
using TransportProtocol::stop;
void reset() 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 afterContentReception(const Interest &interest,
const ContentObject &content_object);
virtual void afterDataUnsatisfied(uint64_t segment);
virtual void updateStats(uint32_t suffix,
const utils::SteadyTime::Microseconds &rtt,
utils::SteadyTime::TimePoint &now);
private:
void init();
void onContentObjectReceived(Interest &i, ContentObject &c,
std::error_code &ec) override;
void onPacketDropped(Interest &interest, ContentObject &content_object,
const std::error_code &reason) override;
void onReassemblyFailed(std::uint32_t missing_segment) override;
void onInterestTimeout(Interest::Ptr &i, const Name &n) override;
virtual void scheduleNextInterests() override;
void sendInterest(const Name &interest_name,
std::array<uint32_t, MAX_AGGREGATED_INTEREST>
*additional_suffixes = nullptr,
uint32_t len = 0) override;
void onContentReassembled(const std::error_code &ec) override;
void updateRtt(uint64_t segment);
void RAAQM();
void updatePathTable(const ContentObject &content_object);
void checkDropProbability();
void checkForStalePaths();
void printRtt();
auto shared_from_this() { return utils::shared_from(this); }
protected:
// Congestion window management
double current_window_size_;
// Protocol management
uint64_t interests_in_flight_;
std::array<std::uint32_t, buffer_size> interest_retransmissions_;
std::array<utils::SteadyTime::TimePoint, buffer_size> interest_timepoints_;
std::queue<uint32_t> interest_to_retransmit_;
private:
/**
* Current download path
*/
RaaqmDataPath *cur_path_;
/**
* Hash table for path: each entry is a pair path ID(key) - path object
*/
PathTable path_table_;
// TimePoints for statistic
utils::SteadyTime::TimePoint t0_;
bool set_interest_filter_;
// for rate-estimation at packet level
IcnRateEstimator *rate_estimator_;
// Real distribution
std::uniform_real_distribution<> dis_;
// params for autotuning
bool raaqm_autotune_;
double default_beta_;
double default_drop_;
double beta_wifi_;
double drop_wifi_;
double beta_lte_;
double drop_lte_;
unsigned int wifi_delay_;
unsigned int lte_delay_;
bool schedule_interests_;
};
} // end namespace protocol
} // end namespace transport
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