curlopt_ssl_enable_alpn(3) mojave man page | unix.com

CURLOPT_SSL_ENABLE_ALPN(3)				     curl_easy_setopt options					CURLOPT_SSL_ENABLE_ALPN(3)

NAME
       CURLOPT_SSL_ENABLE_ALPN - enable ALPN

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_ENABLE_ALPN, long npn);

DESCRIPTION
       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.

DEFAULT
       1, enabled

PROTOCOLS
       HTTP

EXAMPLE
       TODO

AVAILABILITY
       Added in 7.36.0

RETURN VALUE
       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO
       CURLOPT_SSL_ENABLE_NPN(3), CURLOPT_SSL_OPTIONS(3),

libcurl 7.54.0							 February 03, 2016					CURLOPT_SSL_ENABLE_ALPN(3)