2 // blocking_udp_echo_client.cpp
3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 // Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
14 #include <boost/asio.hpp>
16 using boost::asio::ip::udp;
18 enum { max_length = 1024 };
20 int main(int argc, char* argv[])
26 std::cerr << "Usage: blocking_udp_echo_client <host> <port>\n";
30 boost::asio::io_service io_service;
32 udp::socket s(io_service, udp::endpoint(udp::v4(), 0));
34 udp::resolver resolver(io_service);
35 udp::endpoint endpoint = *resolver.resolve({udp::v4(), argv[1], argv[2]});
37 std::cout << "Enter message: ";
38 char request[max_length];
39 std::cin.getline(request, max_length);
40 size_t request_length = std::strlen(request);
41 s.send_to(boost::asio::buffer(request, request_length), endpoint);
43 char reply[max_length];
44 udp::endpoint sender_endpoint;
45 size_t reply_length = s.receive_from(
46 boost::asio::buffer(reply, max_length), sender_endpoint);
47 std::cout << "Reply is: ";
48 std::cout.write(reply, reply_length);
51 catch (std::exception& e)
53 std::cerr << "Exception: " << e.what() << "\n";