curl/docs/libcurl/opts/CURLOPT_SSL_ENABLE_NPN.3

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.TH CURLOPT_SSL_ENABLE_NPN 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_SSL_ENABLE_NPN \- enable NPN
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_ENABLE_NPN, long npn);
.SH DESCRIPTION
Pass a long as parameter, 0 or 1 where 1 is for enable and 0 for disable. By
default, libcurl assumes a value of 1. This option enables/disables NPN in the
SSL handshake (if the SSL backend libcurl is built to use supports it), which
can be used to negotiate http2.
.SH DEFAULT
0
.SH PROTOCOLS
HTTP
.SH EXAMPLE
TODO
.SH AVAILABILITY
Added in 7.36.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_SSL_ENABLE_ALPN "(3), " CURLOPT_SSL_OPTIONS "(3), "