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48<p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
49<p class="level0">CURLOPT_SSL_ENABLE_ALPN - enable ALPN <a name="SYNOPSIS"></a><h2 class="nroffsh">SYNOPSIS</h2>
50<p class="level0">#include &lt;curl/curl.h&gt; 
51<p class="level0">CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_ENABLE_ALPN, long npn); <a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
52<p class="level0">Pass a long as parameter, 0 or 1 where 1 is for enable and 0 for disable. This option enables/disables ALPN in the SSL handshake (if the SSL backend libcurl is built to use supports it), which can be used to negotiate http2. <a name="DEFAULT"></a><h2 class="nroffsh">DEFAULT</h2>
53<p class="level0">1, enabled <a name="PROTOCOLS"></a><h2 class="nroffsh">PROTOCOLS</h2>
54<p class="level0">HTTP <a name="EXAMPLE"></a><h2 class="nroffsh">EXAMPLE</h2>
55<p class="level0">TODO <a name="AVAILABILITY"></a><h2 class="nroffsh">AVAILABILITY</h2>
56<p class="level0">Added in 7.36.0 <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
57<p class="level0">Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
58<p class="level0"><a Class="manpage" href="/CURLOPT_SSL_ENABLE_NPN.html">CURLOPT_SSL_ENABLE_NPN</a> <a Class="manpage" href="/CURLOPT_SSL_OPTIONS.html">CURLOPT_SSL_OPTIONS</a> <span Class="manpage"> </span> <p class="roffit">
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