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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 <ctime>
- #include <iostream>
- #include <string>
- #include <boost/array.hpp>
- #include <boost/asio.hpp>
- using boost::asio::ip::udp;
- std::string make_daytime_string()
- {
- using namespace std; // For time_t, time and ctime;
- time_t now = time(0);
- return ctime(&now);
- }
- int main()
- {
- try
- {
- boost::asio::io_context io_context;
- udp::socket socket(io_context, udp::endpoint(udp::v4(), 13));
- for (;;)
- {
- boost::array<char, 1> recv_buf;
- udp::endpoint remote_endpoint;
- boost::system::error_code error;
- socket.receive_from(boost::asio::buffer(recv_buf), remote_endpoint);
- std::string message = make_daytime_string();
- boost::system::error_code ignored_error;
- socket.send_to(boost::asio::buffer(message),
- remote_endpoint, 0, ignored_error);
- }
- }
- catch (std::exception& e)
- {
- std::cerr << e.what() << std::endl;
- }
- return 0;
- }
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