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/*
* Copyright (c) 2020 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
extern "C" {
#include <hicn/ctrl/api.h>
#include <hicn/util/ip_address.h>
}
#ifndef ASIO_STANDALONE
#define ASIO_STANDALONE 1
#endif
#include <asio.hpp>
#include <asio/steady_timer.hpp>
#include <functional>
#include <thread>
#include <unordered_map>
namespace transport {
typedef std::function<void(uint32_t, bool)> SetRouteCallback;
struct route_info_t {
int family;
std::string remote_addr;
uint16_t remote_port;
std::string route_addr;
uint8_t route_len;
};
using RouteInfoPtr = std::shared_ptr<route_info_t>;
class ForwarderInterface {
public:
ForwarderInterface(asio::io_service &io_service)
: external_ioservice_(io_service),
work_(std::make_unique<asio::io_service::work>(internal_ioservice_)),
sock_(nullptr),
thread_(std::make_unique<std::thread>(
[this]() { internal_ioservice_.run(); })),
check_routes_timer_(nullptr),
pending_add_route_counter_(0),
route_id_(0) {}
~ForwarderInterface();
int connectToForwarder();
void removeConnectedUserNow(uint32_t route_id);
// to be called at the server
// at the client this creates a race condition
// and the program enters in a loop
void scheduleRemoveConnectedUser(uint32_t route_id);
template <typename Callback>
void createFaceAndRoute(RouteInfoPtr &&route_info, Callback &&callback) {
internal_ioservice_.post([this, _route_info = std::move(route_info),
_callback = std::forward<Callback>(callback)]() {
pending_add_route_counter_++;
uint8_t max_try = 5;
auto timer = new asio::steady_timer(internal_ioservice_);
internalCreateFaceAndRoute(std::move(_route_info), max_try, timer,
std::move(_callback));
});
}
int32_t getMainListenerPort();
void close();
private:
void internalRemoveConnectedUser(uint32_t route_id);
void internalCreateFaceAndRoute(RouteInfoPtr route_info, uint8_t max_try,
asio::steady_timer *timer,
SetRouteCallback callback);
int tryToCreateFaceAndRoute(route_info_t *route_info);
asio::io_service &external_ioservice_;
asio::io_service internal_ioservice_;
std::unique_ptr<asio::io_service::work> work_;
hc_sock_t *sock_;
std::unique_ptr<std::thread> thread_;
std::unordered_map<uint32_t, RouteInfoPtr> route_status_;
std::unique_ptr<asio::steady_timer> check_routes_timer_;
uint32_t pending_add_route_counter_;
uint32_t route_id_;
};
} // namespace transport
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