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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
#include <hicn/transport/interfaces/socket_consumer.h>
#include <hicn/transport/utils/event_thread.h>
#include "forwarder_config.h"
#include "http_session.h"
#include "icn_receiver.h"
#define ASIO_STANDALONE
#include <asio.hpp>
#include <asio/version.hpp>
#include <unordered_set>
class TcpListener {
public:
using AcceptCallback = std::function<void(asio::ip::tcp::socket&&)>;
TcpListener(asio::io_service& io_service, short port, AcceptCallback callback)
: acceptor_(io_service,
asio::ip::tcp::endpoint(
asio::ip::address::from_string("127.0.0.1"), port)),
#if ((ASIO_VERSION / 100 % 1000) < 12)
socket_(io_service),
#endif
callback_(callback) {
}
public:
void doAccept() {
#if ((ASIO_VERSION / 100 % 1000) >= 12)
acceptor_.async_accept(
[this](std::error_code ec, asio::ip::tcp::socket socket) {
#else
acceptor_.async_accept(socket_, [this](std::error_code ec) {
auto socket = std::move(socket_);
#endif
if (!ec) {
callback_(std::move(socket));
doAccept();
}
});
}
void stop() { acceptor_.close(); }
asio::ip::tcp::acceptor acceptor_;
#if ((ASIO_VERSION / 100 % 1000) < 12)
asio::ip::tcp::socket socket_;
#endif
AcceptCallback callback_;
};
namespace transport {
class HTTPClientConnectionCallback;
class Receiver {
public:
Receiver() : thread_() {}
virtual ~Receiver() = default;
void stopAndJoinThread() { thread_.stop(); }
virtual void stop() = 0;
protected:
utils::EventThread thread_;
};
class TcpReceiver : public Receiver {
friend class HTTPClientConnectionCallback;
public:
TcpReceiver(std::uint16_t port, const std::string& prefix,
const std::string& ipv6_first_word);
void stop() override;
private:
void onNewConnection(asio::ip::tcp::socket&& socket);
void onClientDisconnect(HTTPClientConnectionCallback* client);
template <typename Callback>
void parseHicnHeader(std::string& hicn_header, Callback&& callback) {
forwarder_config_.parseHicnHeader(hicn_header,
std::forward<Callback>(callback));
}
TcpListener listener_;
std::string prefix_;
std::string ipv6_first_word_;
std::string prefix_hash_;
std::deque<HTTPClientConnectionCallback*> http_clients_;
std::unordered_set<HTTPClientConnectionCallback*> used_http_clients_;
ForwarderConfig forwarder_config_;
bool stopped_;
};
class IcnReceiver : public Receiver {
public:
template <typename... Args>
IcnReceiver(Args&&... args)
: Receiver(),
icn_consum_producer_(thread_.getIoService(),
std::forward<Args>(args)...) {
icn_consum_producer_.run();
}
void stop() override {
thread_.add([this]() {
/* Stop the listener */
icn_consum_producer_.stop();
});
}
private:
AsyncConsumerProducer icn_consum_producer_;
};
class HTTPProxy {
public:
enum Server { CREATE };
enum Client { WRAP_BUFFER };
struct CommonParams {
std::string prefix;
std::string first_ipv6_word;
virtual void printParams() { std::cout << "Parameters: " << std::endl; };
};
struct ClientParams : virtual CommonParams {
short tcp_listen_port;
void printParams() override {
std::cout << "Running HTTP/TCP -> HTTP/hICN proxy." << std::endl;
CommonParams::printParams();
std::cout << "\t"
<< "HTTP listen port: " << tcp_listen_port << std::endl;
std::cout << "\t"
<< "Consumer Prefix: " << prefix << std::endl;
std::cout << "\t"
<< "Prefix first word: " << first_ipv6_word << std::endl;
}
};
struct ServerParams : virtual CommonParams {
std::string origin_address;
std::string origin_port;
std::string cache_size;
std::string mtu;
std::string content_lifetime;
bool manifest;
void printParams() override {
std::cout << "Running HTTP/hICN -> HTTP/TCP proxy." << std::endl;
CommonParams::printParams();
std::cout << "\t"
<< "Origin address: " << origin_address << std::endl;
std::cout << "\t"
<< "Origin port: " << origin_port << std::endl;
std::cout << "\t"
<< "Producer cache size: " << cache_size << std::endl;
std::cout << "\t"
<< "hICN MTU: " << mtu << std::endl;
std::cout << "\t"
<< "Default content lifetime: " << content_lifetime
<< std::endl;
std::cout << "\t"
<< "Producer Prefix: " << prefix << std::endl;
std::cout << "\t"
<< "Prefix first word: " << first_ipv6_word << std::endl;
std::cout << "\t"
<< "Use manifest: " << manifest << std::endl;
}
};
HTTPProxy(ClientParams& icn_params, std::size_t n_thread = 1);
HTTPProxy(ServerParams& icn_params, std::size_t n_thread = 1);
void run() { main_io_context_.run(); }
void stop();
private:
void setupSignalHandler();
std::vector<std::unique_ptr<Receiver>> receivers_;
asio::io_service main_io_context_;
asio::signal_set signals_;
};
} // namespace transport
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