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<pre class="programlisting">//
// server.cpp
// ~~~~~~~~~~
//
// Copyright (c) 2003-2021 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;ctime&gt;
#include &lt;iostream&gt;
#include &lt;string&gt;
#include &lt;boost/array.hpp&gt;
#include &lt;boost/bind/bind.hpp&gt;
#include &lt;boost/shared_ptr.hpp&gt;
#include &lt;boost/enable_shared_from_this.hpp&gt;
#include &lt;boost/asio.hpp&gt;
using boost::asio::ip::tcp;
using boost::asio::ip::udp;
std::string make_daytime_string()
{
using namespace std; // For time_t, time and ctime;
time_t now = time(0);
return ctime(&amp;now);
}
class tcp_connection
: public boost::enable_shared_from_this&lt;tcp_connection&gt;
{
public:
typedef boost::shared_ptr&lt;tcp_connection&gt; pointer;
static pointer create(boost::asio::io_context&amp; io_context)
{
return pointer(new tcp_connection(io_context));
}
tcp::socket&amp; socket()
{
return socket_;
}
void start()
{
message_ = make_daytime_string();
boost::asio::async_write(socket_, boost::asio::buffer(message_),
boost::bind(&amp;tcp_connection::handle_write, shared_from_this()));
}
private:
tcp_connection(boost::asio::io_context&amp; io_context)
: socket_(io_context)
{
}
void handle_write()
{
}
tcp::socket socket_;
std::string message_;
};
class tcp_server
{
public:
tcp_server(boost::asio::io_context&amp; io_context)
: io_context_(io_context),
acceptor_(io_context, tcp::endpoint(tcp::v4(), 13))
{
start_accept();
}
private:
void start_accept()
{
tcp_connection::pointer new_connection =
tcp_connection::create(io_context_);
acceptor_.async_accept(new_connection-&gt;socket(),
boost::bind(&amp;tcp_server::handle_accept, this, new_connection,
boost::asio::placeholders::error));
}
void handle_accept(tcp_connection::pointer new_connection,
const boost::system::error_code&amp; error)
{
if (!error)
{
new_connection-&gt;start();
}
start_accept();
}
boost::asio::io_context&amp; io_context_;
tcp::acceptor acceptor_;
};
class udp_server
{
public:
udp_server(boost::asio::io_context&amp; io_context)
: socket_(io_context, udp::endpoint(udp::v4(), 13))
{
start_receive();
}
private:
void start_receive()
{
socket_.async_receive_from(
boost::asio::buffer(recv_buffer_), remote_endpoint_,
boost::bind(&amp;udp_server::handle_receive, this,
boost::asio::placeholders::error));
}
void handle_receive(const boost::system::error_code&amp; error)
{
if (!error)
{
boost::shared_ptr&lt;std::string&gt; message(
new std::string(make_daytime_string()));
socket_.async_send_to(boost::asio::buffer(*message), remote_endpoint_,
boost::bind(&amp;udp_server::handle_send, this, message));
start_receive();
}
}
void handle_send(boost::shared_ptr&lt;std::string&gt; /*message*/)
{
}
udp::socket socket_;
udp::endpoint remote_endpoint_;
boost::array&lt;char, 1&gt; recv_buffer_;
};
int main()
{
try
{
boost::asio::io_context io_context;
tcp_server server1(io_context);
udp_server server2(io_context);
io_context.run();
}
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="../tutdaytime7.html" title="Daytime.7 - A combined TCP/UDP asynchronous server">Daytime.7 - A
combined TCP/UDP asynchronous server</a>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2021 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>)
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