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- //
- // server.cpp
- // ~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
- #include <cstdlib>
- #include <iostream>
- #include <boost/bind.hpp>
- #include <boost/asio.hpp>
- #include <boost/asio/ssl.hpp>
- typedef boost::asio::ssl::stream<boost::asio::ip::tcp::socket> ssl_socket;
- class session
- {
- public:
- session(boost::asio::io_context& io_context,
- boost::asio::ssl::context& context)
- : socket_(io_context, context)
- {
- }
- ssl_socket::lowest_layer_type& socket()
- {
- return socket_.lowest_layer();
- }
- void start()
- {
- socket_.async_handshake(boost::asio::ssl::stream_base::server,
- boost::bind(&session::handle_handshake, this,
- boost::asio::placeholders::error));
- }
- void handle_handshake(const boost::system::error_code& error)
- {
- if (!error)
- {
- socket_.async_read_some(boost::asio::buffer(data_, max_length),
- boost::bind(&session::handle_read, this,
- boost::asio::placeholders::error,
- boost::asio::placeholders::bytes_transferred));
- }
- else
- {
- delete this;
- }
- }
- void handle_read(const boost::system::error_code& error,
- size_t bytes_transferred)
- {
- if (!error)
- {
- boost::asio::async_write(socket_,
- boost::asio::buffer(data_, bytes_transferred),
- boost::bind(&session::handle_write, this,
- boost::asio::placeholders::error));
- }
- else
- {
- delete this;
- }
- }
- void handle_write(const boost::system::error_code& error)
- {
- if (!error)
- {
- socket_.async_read_some(boost::asio::buffer(data_, max_length),
- boost::bind(&session::handle_read, this,
- boost::asio::placeholders::error,
- boost::asio::placeholders::bytes_transferred));
- }
- else
- {
- delete this;
- }
- }
- private:
- ssl_socket socket_;
- enum { max_length = 1024 };
- char data_[max_length];
- };
- class server
- {
- public:
- server(boost::asio::io_context& io_context, unsigned short port)
- : io_context_(io_context),
- acceptor_(io_context,
- boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), port)),
- context_(boost::asio::ssl::context::sslv23)
- {
- context_.set_options(
- boost::asio::ssl::context::default_workarounds
- | boost::asio::ssl::context::no_sslv2
- | boost::asio::ssl::context::single_dh_use);
- context_.set_password_callback(boost::bind(&server::get_password, this));
- context_.use_certificate_chain_file("server.pem");
- context_.use_private_key_file("server.pem", boost::asio::ssl::context::pem);
- context_.use_tmp_dh_file("dh2048.pem");
- start_accept();
- }
- std::string get_password() const
- {
- return "test";
- }
- void start_accept()
- {
- session* new_session = new session(io_context_, context_);
- acceptor_.async_accept(new_session->socket(),
- boost::bind(&server::handle_accept, this, new_session,
- boost::asio::placeholders::error));
- }
- void handle_accept(session* new_session,
- const boost::system::error_code& error)
- {
- if (!error)
- {
- new_session->start();
- }
- else
- {
- delete new_session;
- }
- start_accept();
- }
- private:
- boost::asio::io_context& io_context_;
- boost::asio::ip::tcp::acceptor acceptor_;
- boost::asio::ssl::context context_;
- };
- int main(int argc, char* argv[])
- {
- try
- {
- if (argc != 2)
- {
- std::cerr << "Usage: server <port>\n";
- return 1;
- }
- boost::asio::io_context io_context;
- using namespace std; // For atoi.
- server s(io_context, atoi(argv[1]));
- io_context.run();
- }
- catch (std::exception& e)
- {
- std::cerr << "Exception: " << e.what() << "\n";
- }
- return 0;
- }
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