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- //
- // client.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 <iostream>
- #include <boost/array.hpp>
- #include <boost/asio.hpp>
- using boost::asio::ip::udp;
- int main(int argc, char* argv[])
- {
- try
- {
- if (argc != 2)
- {
- std::cerr << "Usage: client <host>" << std::endl;
- return 1;
- }
- boost::asio::io_context io_context;
- udp::resolver resolver(io_context);
- udp::endpoint receiver_endpoint =
- *resolver.resolve(udp::v4(), argv[1], "daytime").begin();
- udp::socket socket(io_context);
- socket.open(udp::v4());
- boost::array<char, 1> send_buf = {{ 0 }};
- socket.send_to(boost::asio::buffer(send_buf), receiver_endpoint);
- boost::array<char, 128> recv_buf;
- udp::endpoint sender_endpoint;
- size_t len = socket.receive_from(
- boost::asio::buffer(recv_buf), sender_endpoint);
- std::cout.write(recv_buf.data(), len);
- }
- catch (std::exception& e)
- {
- std::cerr << e.what() << std::endl;
- }
- return 0;
- }
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