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<title>SSL_CTX_flush_sessions</title>
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<li><a href="#NAME">NAME</a></li>
<li><a href="#SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#NOTES">NOTES</a></li>
<li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
<li><a href="#SEE-ALSO">SEE ALSO</a></li>
<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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<h1 id="NAME">NAME</h1>
<p>SSL_CTX_flush_sessions - remove expired sessions</p>
<h1 id="SYNOPSIS">SYNOPSIS</h1>
<pre><code> #include <openssl/ssl.h>
void SSL_CTX_flush_sessions(SSL_CTX *ctx, long tm);</code></pre>
<h1 id="DESCRIPTION">DESCRIPTION</h1>
<p>SSL_CTX_flush_sessions() causes a run through the session cache of <b>ctx</b> to remove sessions expired at time <b>tm</b>.</p>
<h1 id="NOTES">NOTES</h1>
<p>If enabled, the internal session cache will collect all sessions established up to the specified maximum number (see SSL_CTX_sess_set_cache_size()). As sessions will not be reused ones they are expired, they should be removed from the cache to save resources. This can either be done automatically whenever 255 new sessions were established (see <a href="../man3/SSL_CTX_set_session_cache_mode.html">SSL_CTX_set_session_cache_mode(3)</a>) or manually by calling SSL_CTX_flush_sessions().</p>
<p>The parameter <b>tm</b> specifies the time which should be used for the expiration test, in most cases the actual time given by time(0) will be used.</p>
<p>SSL_CTX_flush_sessions() will only check sessions stored in the internal cache. When a session is found and removed, the remove_session_cb is however called to synchronize with the external cache (see <a href="../man3/SSL_CTX_sess_set_get_cb.html">SSL_CTX_sess_set_get_cb(3)</a>).</p>
<h1 id="RETURN-VALUES">RETURN VALUES</h1>
<p>SSL_CTX_flush_sessions() does not return a value.</p>
<h1 id="SEE-ALSO">SEE ALSO</h1>
<p><a href="../man7/ssl.html">ssl(7)</a>, <a href="../man3/SSL_CTX_set_session_cache_mode.html">SSL_CTX_set_session_cache_mode(3)</a>, <a href="../man3/SSL_CTX_set_timeout.html">SSL_CTX_set_timeout(3)</a>, <a href="../man3/SSL_CTX_sess_set_get_cb.html">SSL_CTX_sess_set_get_cb(3)</a></p>
<h1 id="COPYRIGHT">COPYRIGHT</h1>
<p>Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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