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.IX Title &quot;SSL_CTX_HAS_CLIENT_CUSTOM_EXT 3&quot;
.TH SSL_CTX_HAS_CLIENT_CUSTOM_EXT 3 &quot;2023-09-11&quot; &quot;1.1.1w&quot; &quot;OpenSSL&quot;
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.SH &quot;NAME&quot;
SSL_CTX_has_client_custom_ext \- check whether a handler exists for a particular client extension type
.SH &quot;SYNOPSIS&quot;
.IX Header &quot;SYNOPSIS&quot;
.Vb 1
\&amp; #include &lt;openssl/ssl.h&gt;
\&amp;
\&amp; int SSL_CTX_has_client_custom_ext(const SSL_CTX *ctx, unsigned int ext_type);
.Ve
.SH &quot;DESCRIPTION&quot;
.IX Header &quot;DESCRIPTION&quot;
\&amp;\fBSSL_CTX_has_client_custom_ext()\fR checks whether a handler has been set for a
client extension of type \fBext_type\fR using \fBSSL_CTX_add_client_custom_ext()\fR.
.SH &quot;RETURN VALUES&quot;
.IX Header &quot;RETURN VALUES&quot;
Returns 1 if a handler has been set, 0 otherwise.
.SH &quot;SEE ALSO&quot;
.IX Header &quot;SEE ALSO&quot;
\&amp;\fBssl\fR\|(7),
\&amp;\fBSSL_CTX_add_client_custom_ext\fR\|(3)
.SH &quot;COPYRIGHT&quot;
.IX Header &quot;COPYRIGHT&quot;
Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L&quot;License\*(R&quot;).  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
&lt;https://www.openssl.org/source/license.html&gt;.
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