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- //
- // blocking_udp_echo_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 <cstdlib>
- #include <cstring>
- #include <iostream>
- #include <boost/asio.hpp>
- using boost::asio::ip::udp;
- enum { max_length = 1024 };
- int main(int argc, char* argv[])
- {
- try
- {
- if (argc != 3)
- {
- std::cerr << "Usage: blocking_udp_echo_client <host> <port>\n";
- return 1;
- }
- boost::asio::io_context io_context;
- udp::socket s(io_context, udp::endpoint(udp::v4(), 0));
- udp::resolver resolver(io_context);
- udp::resolver::results_type endpoints =
- resolver.resolve(udp::v4(), argv[1], argv[2]);
- std::cout << "Enter message: ";
- char request[max_length];
- std::cin.getline(request, max_length);
- size_t request_length = std::strlen(request);
- s.send_to(boost::asio::buffer(request, request_length), *endpoints.begin());
- char reply[max_length];
- udp::endpoint sender_endpoint;
- size_t reply_length = s.receive_from(
- boost::asio::buffer(reply, max_length), sender_endpoint);
- std::cout << "Reply is: ";
- std::cout.write(reply, reply_length);
- std::cout << "\n";
- }
- catch (std::exception& e)
- {
- std::cerr << "Exception: " << e.what() << "\n";
- }
- return 0;
- }
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