| .\" ************************************************************************** |
| .\" * _ _ ____ _ |
| .\" * Project ___| | | | _ \| | |
| .\" * / __| | | | |_) | | |
| .\" * | (__| |_| | _ <| |___ |
| .\" * \___|\___/|_| \_\_____| |
| .\" * |
| .\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. |
| .\" * |
| .\" * This software is licensed as described in the file COPYING, which |
| .\" * you should have received as part of this distribution. The terms |
| .\" * are also available at https://curl.haxx.se/docs/copyright.html. |
| .\" * |
| .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| .\" * copies of the Software, and permit persons to whom the Software is |
| .\" * furnished to do so, under the terms of the COPYING file. |
| .\" * |
| .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| .\" * KIND, either express or implied. |
| .\" * |
| .\" ************************************************************************** |
| .\" |
| .TH CURLOPT_SSL_FALSESTART 3 "14 Feb 2015" "libcurl 7.41.0" "curl_easy_setopt options" |
| .SH NAME |
| CURLOPT_SSL_FALSESTART \- enable TLS false start |
| .SH SYNOPSIS |
| #include <curl/curl.h> |
| |
| CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_FALSESTART, long enable); |
| .SH 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. |
| .SH DEFAULT |
| 0 |
| .SH PROTOCOLS |
| All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc. |
| .SH EXAMPLE |
| .nf |
| 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); |
| } |
| .fi |
| .SH 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. |
| .SH RETURN VALUE |
| Returns CURLE_OK if false start is supported by the SSL backend, otherwise |
| returns CURLE_NOT_BUILT_IN. |
