CURLOPT_SSL_ENABLE_NPN(3)  curl_easy_setopt options  CURLOPT_SSL_ENABLE_NPN(3)

NAME
       CURLOPT_SSL_ENABLE_NPN - enable NPN

SYNOPSIS
       #include <curl/curl.h>

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

DESCRIPTION
       Pass a long as parameter, 0 or 1 where 1 is for enable and 0  for  dis-
       able. 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.

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_ALPN(3), CURLOPT_SSL_OPTIONS(3),

libcurl 7.54.0                 February 03, 2016     CURLOPT_SSL_ENABLE_NPN(3)