NAME

       CURLOPT_SSL_FALSESTART - enable TLS false start

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_FALSESTART, long enable);

DESCRIPTION

       Pass a long as parameter set to 1L to enable or 0 to disable.

       This  option determines whether libcurl should use false start during the TLS handshake. False start is a
       mode where a TLS client will start sending  application  data  before  verifying  the  server's  Finished
       message, thus saving a round trip when performing a full handshake.

DEFAULT

       0

PROTOCOLS

       All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

EXAMPLE

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

AVAILABILITY

       Added  in  7.42.0. This option is currently only supported by the NSS and Secure Transport (on iOS 7.0 or
       later, or OS X 10.9 or later) TLS backends.

RETURN VALUE

       Returns CURLE_OK if false start is supported by the SSL backend, otherwise returns CURLE_NOT_BUILT_IN.