95 lines
3.7 KiB
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95 lines
3.7 KiB
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<title>Source listing for Daytime.4</title>
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<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
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<div class="titlepage"><div><div><h4 class="title">
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<a name="asio.tutorial.tutdaytime4.src"></a><a class="link" href="src.html" title="Source listing for Daytime.4">Source listing for Daytime.4</a>
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</h4></div></div></div>
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<pre class="programlisting">//
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// client.cpp
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// ~~~~~~~~~~
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//
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// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include <iostream>
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#include <boost/array.hpp>
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#include <asio.hpp>
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using asio::ip::udp;
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int main(int argc, char* argv[])
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{
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try
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{
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if (argc != 2)
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{
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std::cerr << "Usage: client <host>" << std::endl;
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return 1;
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}
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asio::io_context io_context;
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udp::resolver resolver(io_context);
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udp::endpoint receiver_endpoint =
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*resolver.resolve(udp::v4(), argv[1], "daytime").begin();
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udp::socket socket(io_context);
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socket.open(udp::v4());
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boost::array<char, 1> send_buf = {{ 0 }};
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socket.send_to(asio::buffer(send_buf), receiver_endpoint);
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boost::array<char, 128> recv_buf;
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udp::endpoint sender_endpoint;
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size_t len = socket.receive_from(
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asio::buffer(recv_buf), sender_endpoint);
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std::cout.write(recv_buf.data(), len);
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}
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catch (std::exception& e)
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{
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std::cerr << e.what() << std::endl;
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}
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return 0;
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}
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</pre>
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<p>
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Return to <a class="link" href="../tutdaytime4.html" title="Daytime.4 - A synchronous UDP daytime client">Daytime.4 - A synchronous
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UDP daytime client</a>
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</p>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
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Kohlhoff<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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