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HTML
109 lines
4.2 KiB
HTML
<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>SSL handshake handler requirements</title>
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<link rel="stylesheet" href="../../boostbook.css" type="text/css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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<link rel="home" href="../../index.html" title="Asio">
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<link rel="up" href="../reference.html" title="Reference">
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<link rel="prev" href="Handler.html" title="Handlers">
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<link rel="next" href="InternetProtocol.html" title="Internet protocol requirements">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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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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<hr>
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<div class="spirit-nav">
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<a accesskey="p" href="Handler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="InternetProtocol.html"><img src="../../next.png" alt="Next"></a>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="asio.reference.HandshakeHandler"></a><a class="link" href="HandshakeHandler.html" title="SSL handshake handler requirements">SSL handshake handler
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requirements</a>
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</h3></div></div></div>
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<p>
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A handshake handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
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A value <code class="computeroutput">h</code> of a handshake handler class should work correctly
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in the expression <code class="computeroutput">h(ec)</code>, where <code class="computeroutput">ec</code> is an lvalue
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of type <code class="computeroutput">const error_code</code>.
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</p>
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<h5>
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<a name="asio.reference.HandshakeHandler.h0"></a>
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<span><a name="asio.reference.HandshakeHandler.examples"></a></span><a class="link" href="HandshakeHandler.html#asio.reference.HandshakeHandler.examples">Examples</a>
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</h5>
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<p>
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A free function as a handshake handler:
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</p>
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<pre class="programlisting">void handshake_handler(
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const asio::error_code& ec)
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{
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...
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}
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</pre>
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<p>
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A handshake handler function object:
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</p>
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<pre class="programlisting">struct handshake_handler
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{
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...
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void operator()(
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const asio::error_code& ec)
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{
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...
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}
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...
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};
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</pre>
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<p>
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A lambda as a handshake handler:
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</p>
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<pre class="programlisting">ssl_stream.async_handshake(...,
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[](const asio::error_code& ec)
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{
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...
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});
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</pre>
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<p>
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A non-static class member function adapted to a handshake handler using
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<code class="computeroutput">std::bind()</code>:
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</p>
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<pre class="programlisting">void my_class::handshake_handler(
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const asio::error_code& ec)
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{
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...
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}
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...
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ssl_stream.async_handshake(...,
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std::bind(&my_class::handshake_handler,
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this, std::placeholders::_1));
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</pre>
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<p>
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A non-static class member function adapted to a handshake handler using
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<code class="computeroutput">boost::bind()</code>:
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</p>
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<pre class="programlisting">void my_class::handshake_handler(
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const asio::error_code& ec)
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{
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...
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}
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...
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ssl_stream.async_handshake(...,
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boost::bind(&my_class::handshake_handler,
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this, asio::placeholders::error));
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</pre>
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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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</p>
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</div></td>
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</tr></table>
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<hr>
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<div class="spirit-nav">
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<a accesskey="p" href="Handler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="InternetProtocol.html"><img src="../../next.png" alt="Next"></a>
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</div>
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</body>
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