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1 | // |
2 | // client.cpp | |
3 | // ~~~~~~~~~~ | |
4 | // | |
b32b8144 | 5 | // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
7c673cae FG |
6 | // |
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) | |
9 | // | |
10 | ||
11 | #include <iostream> | |
12 | #include <boost/array.hpp> | |
13 | #include <boost/asio.hpp> | |
14 | ||
15 | using boost::asio::ip::udp; | |
16 | ||
17 | int main(int argc, char* argv[]) | |
18 | { | |
19 | try | |
20 | { | |
21 | if (argc != 2) | |
22 | { | |
23 | std::cerr << "Usage: client <host>" << std::endl; | |
24 | return 1; | |
25 | } | |
26 | ||
b32b8144 | 27 | boost::asio::io_context io_context; |
7c673cae | 28 | |
b32b8144 FG |
29 | udp::resolver resolver(io_context); |
30 | udp::endpoint receiver_endpoint = | |
31 | *resolver.resolve(udp::v4(), argv[1], "daytime").begin(); | |
7c673cae | 32 | |
b32b8144 | 33 | udp::socket socket(io_context); |
7c673cae FG |
34 | socket.open(udp::v4()); |
35 | ||
36 | boost::array<char, 1> send_buf = {{ 0 }}; | |
37 | socket.send_to(boost::asio::buffer(send_buf), receiver_endpoint); | |
38 | ||
39 | boost::array<char, 128> recv_buf; | |
40 | udp::endpoint sender_endpoint; | |
41 | size_t len = socket.receive_from( | |
42 | boost::asio::buffer(recv_buf), sender_endpoint); | |
43 | ||
44 | std::cout.write(recv_buf.data(), len); | |
45 | } | |
46 | catch (std::exception& e) | |
47 | { | |
48 | std::cerr << e.what() << std::endl; | |
49 | } | |
50 | ||
51 | return 0; | |
52 | } |