HandshakeHandler.html
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<title>SSL handshake handler requirements</title>
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<div class="titlepage"><div><div><h3 class="title">
<a name="asio.reference.HandshakeHandler"></a><a class="link" href="HandshakeHandler.html" title="SSL handshake handler requirements">SSL handshake handler
requirements</a>
</h3></div></div></div>
<p>
A handshake handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
A value <code class="computeroutput">h</code> of a handshake handler class should work correctly
in the expression <code class="computeroutput">h(ec)</code>, where <code class="computeroutput">ec</code> is an lvalue
of type <code class="computeroutput">const error_code</code>.
</p>
<h5>
<a name="asio.reference.HandshakeHandler.h0"></a>
<span><a name="asio.reference.HandshakeHandler.examples"></a></span><a class="link" href="HandshakeHandler.html#asio.reference.HandshakeHandler.examples">Examples</a>
</h5>
<p>
A free function as a handshake handler:
</p>
<pre class="programlisting">void handshake_handler(
const asio::error_code& ec)
{
...
}
</pre>
<p>
A handshake handler function object:
</p>
<pre class="programlisting">struct handshake_handler
{
...
void operator()(
const asio::error_code& ec)
{
...
}
...
};
</pre>
<p>
A lambda as a handshake handler:
</p>
<pre class="programlisting">ssl_stream.async_handshake(...,
[](const asio::error_code& ec)
{
...
});
</pre>
<p>
A non-static class member function adapted to a handshake handler using
<code class="computeroutput">std::bind()</code>:
</p>
<pre class="programlisting">void my_class::handshake_handler(
const asio::error_code& ec)
{
...
}
...
ssl_stream.async_handshake(...,
std::bind(&my_class::handshake_handler,
this, std::placeholders::_1));
</pre>
<p>
A non-static class member function adapted to a handshake handler using
<code class="computeroutput">boost::bind()</code>:
</p>
<pre class="programlisting">void my_class::handshake_handler(
const asio::error_code& ec)
{
...
}
...
ssl_stream.async_handshake(...,
boost::bind(&my_class::handshake_handler,
this, asio::placeholders::error));
</pre>
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<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>)
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