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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 <core/portal.h>
#include <hicn/transport/interfaces/callbacks.h>
#include <protocols/rtc/rtc_state.h>
#include <array>
namespace transport {
namespace protocol {
namespace rtc {
class RTCForwardingStrategy {
public:
enum strategy_t {
BEST_PATH,
REPLICATION,
BOTH,
NONE,
};
RTCForwardingStrategy();
~RTCForwardingStrategy();
void initFwdStrategy(std::shared_ptr<core::Portal> portal,
core::Prefix& prefix, RTCState* state,
interface::RtcTransportRecoveryStrategies strategy);
void checkStrategy();
void setCallback(interface::StrategyCallback&& callback);
private:
void checkStrategyBestPath();
void checkStrategyReplication();
void checkStrategyBoth();
void setStrategy(strategy_t strategy);
std::array<std::string, 4> string_strategies_ = {"bestpath", "replication",
"both", "none"};
bool low_rate_app_; // if set to true the best path strategy will
// trigger a path switch based on the quality
// score, otherwise it will use the RTT,
// queuing delay and loss rate
bool init_; // true if all val are initializes
bool forwarder_set_; // true if the strategy is been set at least
// once
strategy_t selected_strategy_; // this is the strategy selected using socket
// options. this can also be equal to BOTH
strategy_t current_strategy_; // if both strategies can be used this
// indicates the one that is currently in use
// that can be only replication or best path
uint32_t rounds_since_last_set_;
core::Prefix prefix_;
std::shared_ptr<core::Portal> portal_;
RTCState* state_;
interface::StrategyCallback callback_;
};
} // namespace rtc
} // namespace protocol
} // namespace transport
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