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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/core/io_module.h>
#include <hicn/transport/core/prefix.h>
#include <hicn/transport/utils/event_thread.h>
#include <hicn/transport/utils/singleton.h>
#include <hicn/transport/utils/spinlock.h>
#include <io_modules/forwarder/configuration.h>
#include <io_modules/forwarder/udp_tunnel_listener.h>
#include <atomic>
#include <libconfig.h++>
#include <unordered_map>
namespace transport {
namespace core {
class Forwarder : public utils::Singleton<Forwarder> {
static constexpr char forwarder_config_section[] = "forwarder";
friend class utils::Singleton<Forwarder>;
public:
Forwarder();
~Forwarder();
void initThreads();
void initListeners();
void initConnectors();
Connector::Id registerLocalConnector(
asio::io_service &io_service,
Connector::PacketReceivedCallback &&receive_callback,
Connector::OnReconnectCallback &&reconnect_callback);
Forwarder &deleteConnector(Connector::Id id);
Connector::Ptr getConnector(Connector::Id id);
void send(Packet &packet);
void stop();
private:
void onPacketFromListener(Connector *connector, utils::MemBuf &packet_buffer,
const std::error_code &ec);
void onPacketReceived(Connector *connector, utils::MemBuf &packet_buffer,
const std::error_code &ec);
void onPacketSent(Connector *connector, const std::error_code &ec);
void onConnectorClosed(Connector *connector);
void onConnectorReconnected(Connector *connector);
void parseForwarderConfiguration(const libconfig::Setting &io_config,
std::error_code &ec);
asio::io_service io_service_;
utils::SpinLock connector_lock_;
/**
* Connectors and listeners must be declares *before* thread_pool_, so that
* threads destructors will wait for them to gracefully close before being
* destroyed.
*/
std::unordered_map<Connector::Id, Connector::Ptr> remote_connectors_;
std::unordered_map<Connector::Id, Connector::Ptr> local_connectors_;
std::vector<UdpTunnelListener::Ptr> listeners_;
std::vector<utils::EventThread> thread_pool_;
Configuration config_;
};
} // namespace core
} // namespace transport
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