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30 <pre class="programlisting"><span class="comment">//</span>
31 <span class="comment">// server.cpp</span>
32 <span class="comment">// ~~~~~~~~~~</span>
33 <span class="comment">//</span>
34 <span class="comment">// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)</span>
35 <span class="comment">//</span>
36 <span class="comment">// Distributed under the Boost Software License, Version 1.0. (See accompanying</span>
37 <span class="comment">// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)</span>
38 <span class="comment">//</span>
40 <span class="special">#</span><span class="identifier">include</span> <span class="special"><</span><span class="identifier">ctime</span><span class="special">></span>
41 <span class="special">#</span><span class="identifier">include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span>
42 <span class="special">#</span><span class="identifier">include</span> <span class="special"><</span><span class="identifier">string</span><span class="special">></span>
43 <span class="special">#</span><span class="identifier">include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">array</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
44 <span class="special">#</span><span class="identifier">include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bind</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
45 <span class="special">#</span><span class="identifier">include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">shared_ptr</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
46 <span class="special">#</span><span class="identifier">include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">asio</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
48 <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">udp</span><span class="special">;</span>
50 <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">make_daytime_string</span><span class="special">()</span>
51 <span class="special">{</span>
52 <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span> <span class="comment">// For time_t, time and ctime;</span>
53 <span class="identifier">time_t</span> <span class="identifier">now</span> <span class="special">=</span> <span class="identifier">time</span><span class="special">(</span><span class="number">0</span><span class="special">);</span>
54 <span class="keyword">return</span> <span class="identifier">ctime</span><span class="special">(&</span><span class="identifier">now</span><span class="special">);</span>
55 <span class="special">}</span>
57 <span class="keyword">class</span> <span class="identifier">udp_server</span>
58 <span class="special">{</span>
59 <span class="keyword">public</span><span class="special">:</span>
60 <span class="identifier">udp_server</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span><span class="special">&</span> <span class="identifier">io_service</span><span class="special">)</span>
61 <span class="special">:</span> <span class="identifier">socket_</span><span class="special">(</span><span class="identifier">io_service</span><span class="special">,</span> <span class="identifier">udp</span><span class="special">::</span><span class="identifier">endpoint</span><span class="special">(</span><span class="identifier">udp</span><span class="special">::</span><span class="identifier">v4</span><span class="special">(),</span> <span class="number">13</span><span class="special">))</span>
62 <span class="special">{</span>
63 <span class="identifier">start_receive</span><span class="special">();</span>
64 <span class="special">}</span>
66 <span class="keyword">private</span><span class="special">:</span>
67 <span class="keyword">void</span> <span class="identifier">start_receive</span><span class="special">()</span>
68 <span class="special">{</span>
69 <span class="identifier">socket_</span><span class="special">.</span><span class="identifier">async_receive_from</span><span class="special">(</span>
70 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">recv_buffer_</span><span class="special">),</span> <span class="identifier">remote_endpoint_</span><span class="special">,</span>
71 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&</span><span class="identifier">udp_server</span><span class="special">::</span><span class="identifier">handle_receive</span><span class="special">,</span> <span class="keyword">this</span><span class="special">,</span>
72 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">placeholders</span><span class="special">::</span><span class="identifier">error</span><span class="special">,</span>
73 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">placeholders</span><span class="special">::</span><span class="identifier">bytes_transferred</span><span class="special">));</span>
74 <span class="special">}</span>
76 <span class="keyword">void</span> <span class="identifier">handle_receive</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">&</span> <span class="identifier">error</span><span class="special">,</span>
77 <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="comment">/*bytes_transferred*/</span><span class="special">)</span>
78 <span class="special">{</span>
79 <span class="keyword">if</span> <span class="special">(!</span><span class="identifier">error</span> <span class="special">||</span> <span class="identifier">error</span> <span class="special">==</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error</span><span class="special">::</span><span class="identifier">message_size</span><span class="special">)</span>
80 <span class="special">{</span>
81 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">></span> <span class="identifier">message</span><span class="special">(</span>
82 <span class="keyword">new</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="identifier">make_daytime_string</span><span class="special">()));</span>
84 <span class="identifier">socket_</span><span class="special">.</span><span class="identifier">async_send_to</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(*</span><span class="identifier">message</span><span class="special">),</span> <span class="identifier">remote_endpoint_</span><span class="special">,</span>
85 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&</span><span class="identifier">udp_server</span><span class="special">::</span><span class="identifier">handle_send</span><span class="special">,</span> <span class="keyword">this</span><span class="special">,</span> <span class="identifier">message</span><span class="special">,</span>
86 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">placeholders</span><span class="special">::</span><span class="identifier">error</span><span class="special">,</span>
87 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">placeholders</span><span class="special">::</span><span class="identifier">bytes_transferred</span><span class="special">));</span>
89 <span class="identifier">start_receive</span><span class="special">();</span>
90 <span class="special">}</span>
91 <span class="special">}</span>
93 <span class="keyword">void</span> <span class="identifier">handle_send</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">></span> <span class="comment">/*message*/</span><span class="special">,</span>
94 <span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">&</span> <span class="comment">/*error*/</span><span class="special">,</span>
95 <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="comment">/*bytes_transferred*/</span><span class="special">)</span>
96 <span class="special">{</span>
97 <span class="special">}</span>
99 <span class="identifier">udp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">socket_</span><span class="special">;</span>
100 <span class="identifier">udp</span><span class="special">::</span><span class="identifier">endpoint</span> <span class="identifier">remote_endpoint_</span><span class="special">;</span>
101 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">array</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="number">1</span><span class="special">></span> <span class="identifier">recv_buffer_</span><span class="special">;</span>
102 <span class="special">};</span>
104 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
105 <span class="special">{</span>
106 <span class="keyword">try</span>
107 <span class="special">{</span>
108 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span> <span class="identifier">io_service</span><span class="special">;</span>
109 <span class="identifier">udp_server</span> <span class="identifier">server</span><span class="special">(</span><span class="identifier">io_service</span><span class="special">);</span>
110 <span class="identifier">io_service</span><span class="special">.</span><span class="identifier">run</span><span class="special">();</span>
111 <span class="special">}</span>
112 <span class="keyword">catch</span> <span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">exception</span><span class="special">&</span> <span class="identifier">e</span><span class="special">)</span>
113 <span class="special">{</span>
114 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cerr</span> <span class="special"><<</span> <span class="identifier">e</span><span class="special">.</span><span class="identifier">what</span><span class="special">()</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
115 <span class="special">}</span>
117 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
118 <span class="special">}</span>
121 Return to <a class="link" href="../tutdaytime6.html" title="Daytime.6 - An asynchronous UDP daytime server">Daytime.6 - An
122 asynchronous UDP daytime server</a>
125 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
126 <td align="left"></td>
127 <td align="right"><div class="copyright-footer">Copyright © 2003-2014 Christopher M. Kohlhoff<p>
128 Distributed under the Boost Software License, Version 1.0. (See accompanying
129 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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