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3rdparty/curl/share/man/man3/CURLOPT_SSL_FALSESTART.3 2.23 KB
a86c63ca   Hu Chunming   提交三方库文件
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  .\" **************************************************************************
  .\" *                                  _   _ ____  _
  .\" *  Project                     ___| | | |  _ \| |
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  .\" *                             \___|\___/|_| \_\_____|
  .\" *
  .\" * 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.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 "November 04, 2020" "libcurl 7.77.0" "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.