1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Source listing for Daytime.5</title> 5<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../boost_asio.html" title="Boost.Asio"> 8<link rel="up" href="../tutdaytime5.html" title="Daytime.5 - A synchronous UDP daytime server"> 9<link rel="prev" href="../tutdaytime5.html" title="Daytime.5 - A synchronous UDP daytime server"> 10<link rel="next" href="../tutdaytime6.html" title="Daytime.6 - An asynchronous UDP daytime server"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="../tutdaytime5.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../tutdaytime5.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../boost_asio.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../tutdaytime6.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="boost_asio.tutorial.tutdaytime5.src"></a><a class="link" href="src.html" title="Source listing for Daytime.5">Source listing 28 for Daytime.5</a> 29</h4></div></div></div> 30<pre class="programlisting">// 31// server.cpp 32// ~~~~~~~~~~ 33// 34// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com) 35// 36// Distributed under the Boost Software License, Version 1.0. (See accompanying 37// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 38// 39 40#include <ctime> 41#include <iostream> 42#include <string> 43#include <boost/array.hpp> 44#include <boost/asio.hpp> 45 46using boost::asio::ip::udp; 47 48std::string make_daytime_string() 49{ 50 using namespace std; // For time_t, time and ctime; 51 time_t now = time(0); 52 return ctime(&now); 53} 54 55int main() 56{ 57 try 58 { 59 boost::asio::io_context io_context; 60 61 udp::socket socket(io_context, udp::endpoint(udp::v4(), 13)); 62 63 for (;;) 64 { 65 boost::array<char, 1> recv_buf; 66 udp::endpoint remote_endpoint; 67 socket.receive_from(boost::asio::buffer(recv_buf), remote_endpoint); 68 69 std::string message = make_daytime_string(); 70 71 boost::system::error_code ignored_error; 72 socket.send_to(boost::asio::buffer(message), 73 remote_endpoint, 0, ignored_error); 74 } 75 } 76 catch (std::exception& e) 77 { 78 std::cerr << e.what() << std::endl; 79 } 80 81 return 0; 82} 83</pre> 84<p> 85 Return to <a class="link" href="../tutdaytime5.html" title="Daytime.5 - A synchronous UDP daytime server">Daytime.5 - A 86 synchronous UDP daytime server</a> 87 </p> 88</div> 89<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 90<td align="left"></td> 91<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 92 Kohlhoff<p> 93 Distributed under the Boost Software License, Version 1.0. (See accompanying 94 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>) 95 </p> 96</div></td> 97</tr></table> 98<hr> 99<div class="spirit-nav"> 100<a accesskey="p" href="../tutdaytime5.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../tutdaytime5.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../boost_asio.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../tutdaytime6.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 101</div> 102</body> 103</html> 104
