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Updated: Thursday, June 13, 2019
 
 

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

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
       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         curl_easy_setopt(curl, CURLOPT_SSL_ENABLE_NPN, 1L);
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY
       Added in 7.36.0

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


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+------------------+
       |ATTRIBUTE TYPE | ATTRIBUTE VALUE  |
       +---------------+------------------+
       |Availability   | web/curl         |
       +---------------+------------------+
       |Stability      | Uncommitted      |
       +---------------+------------------+
SEE ALSO
       CURLOPT_SSL_ENABLE_ALPN(3), CURLOPT_SSL_OPTIONS(3),



NOTES
       This    software    was    built    from    source     available     at
       https://github.com/oracle/solaris-userland.    The  original  community
       source   was    downloaded    from     https://github.com/curl/curl/ar-
       chive/curl-7_64_0.zip

       Further information about this software can be found on the open source
       community website at http://curl.haxx.se/.



libcurl 7.37.0                    19 Jun 2014        CURLOPT_SSL_ENABLE_NPN(3)