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<title>SSL_set_shutdown</title>
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<ul id="index">
  <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>
</ul>

<h1 id="NAME">NAME</h1>

<p>SSL_set_shutdown, SSL_get_shutdown - manipulate shutdown state of an SSL connection</p>

<h1 id="SYNOPSIS">SYNOPSIS</h1>

<pre><code> #include &lt;openssl/ssl.h&gt;

 void SSL_set_shutdown(SSL *ssl, int mode);

 int SSL_get_shutdown(const SSL *ssl);</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>SSL_set_shutdown() sets the shutdown state of <b>ssl</b> to <b>mode</b>.</p>

<p>SSL_get_shutdown() returns the shutdown mode of <b>ssl</b>.</p>

<h1 id="NOTES">NOTES</h1>

<p>The shutdown state of an ssl connection is a bit mask of:</p>

<dl>

<dt id="pod0">0</dt>
<dd>

<p>No shutdown setting, yet.</p>

</dd>
<dt id="SSL_SENT_SHUTDOWN">SSL_SENT_SHUTDOWN</dt>
<dd>

<p>A close_notify shutdown alert was sent to the peer, the connection is being considered closed and the session is closed and correct.</p>

</dd>
<dt id="SSL_RECEIVED_SHUTDOWN">SSL_RECEIVED_SHUTDOWN</dt>
<dd>

<p>A shutdown alert was received form the peer, either a normal close_notify or a fatal error.</p>

</dd>
</dl>

<p>SSL_SENT_SHUTDOWN and SSL_RECEIVED_SHUTDOWN can be set at the same time.</p>

<p>The shutdown state of the connection is used to determine the state of the ssl session. If the session is still open, when <a href="../man3/SSL_clear.html">SSL_clear(3)</a> or <a href="../man3/SSL_free.html">SSL_free(3)</a> is called, it is considered bad and removed according to RFC2246. The actual condition for a correctly closed session is SSL_SENT_SHUTDOWN (according to the TLS RFC, it is acceptable to only send the close_notify alert but to not wait for the peer&#39;s answer, when the underlying connection is closed). SSL_set_shutdown() can be used to set this state without sending a close alert to the peer (see <a href="../man3/SSL_shutdown.html">SSL_shutdown(3)</a>).</p>

<p>If a close_notify was received, SSL_RECEIVED_SHUTDOWN will be set, for setting SSL_SENT_SHUTDOWN the application must however still call <a href="../man3/SSL_shutdown.html">SSL_shutdown(3)</a> or SSL_set_shutdown() itself.</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>SSL_set_shutdown() does not return diagnostic information.</p>

<p>SSL_get_shutdown() returns the current setting.</p>

<h1 id="SEE-ALSO">SEE ALSO</h1>

<p><a href="../man7/ssl.html">ssl(7)</a>, <a href="../man3/SSL_shutdown.html">SSL_shutdown(3)</a>, <a href="../man3/SSL_CTX_set_quiet_shutdown.html">SSL_CTX_set_quiet_shutdown(3)</a>, <a href="../man3/SSL_clear.html">SSL_clear(3)</a>, <a href="../man3/SSL_free.html">SSL_free(3)</a></p>

<h1 id="COPYRIGHT">COPYRIGHT</h1>

<p>Copyright 2001-2020 The OpenSSL Project Authors. All Rights Reserved.</p>

<p>Licensed under the OpenSSL license (the &quot;License&quot;). 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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