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<title>SSL_get_fd</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="#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_get_fd, SSL_get_rfd, SSL_get_wfd - get file descriptor linked to an SSL object</p>

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

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

int SSL_get_fd(const SSL *ssl);
int SSL_get_rfd(const SSL *ssl);
int SSL_get_wfd(const SSL *ssl);</code></pre>

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

<p>SSL_get_fd() returns the file descriptor which is linked to <b>ssl</b>. SSL_get_rfd() and SSL_get_wfd() return the file descriptors for the read or the write channel, which can be different. If the read and the write channel are different, SSL_get_fd() will return the file descriptor of the read channel.</p>

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

<p>The following return values can occur:</p>

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<dt id="pod-1">-1</dt>
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<p>The operation failed, because the underlying BIO is not of the correct type (suitable for file descriptors).</p>

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<dt id="pod-0">&gt;=0</dt>
<dd>

<p>The file descriptor linked to <b>ssl</b>.</p>

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

<p><a href="../man3/SSL_set_fd.html">SSL_set_fd(3)</a>, <a href="../man7/ssl.html">ssl(7)</a> , <a href="../man7/bio.html">bio(7)</a></p>

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

<p>Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.</p>

<p>Licensed under the Apache License 2.0 (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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