Adds asio library and Storage Module

2020-12-01 22:41:04 +01:00
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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">
+<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>
+</h4></div></div></div>
+<pre class="programlisting">//
+// client.cpp
+// ~~~~~~~~~~
+//
+// Copyright (c) 2003-2020 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 &lt;iostream&gt;
+#include &lt;boost/array.hpp&gt;
+#include &lt;asio.hpp&gt;
+
+using asio::ip::udp;
+
+int main(int argc, char* argv[])
+{
+  try
+  {
+    if (argc != 2)
+    {
+      std::cerr &lt;&lt; "Usage: client &lt;host&gt;" &lt;&lt; std::endl;
+      return 1;
+    }
+
+    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&lt;char, 1&gt; send_buf  = {{ 0 }};
+    socket.send_to(asio::buffer(send_buf), receiver_endpoint);
+
+    boost::array&lt;char, 128&gt; recv_buf;
+    udp::endpoint sender_endpoint;
+    size_t len = socket.receive_from(
+        asio::buffer(recv_buf), sender_endpoint);
+
+    std::cout.write(recv_buf.data(), len);
+  }
+  catch (std::exception&amp; e)
+  {
+    std::cerr &lt;&lt; e.what() &lt;&lt; std::endl;
+  }
+
+  return 0;
+}
+</pre>
+<p>
+          Return to <a class="link" href="../tutdaytime4.html" title="Daytime.4 - A synchronous UDP daytime client">Daytime.4 - A synchronous
+          UDP daytime client</a>
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        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>)
+      </p>
+</div></td>
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