63 lines
1.2 KiB
Markdown
63 lines
1.2 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLOPT_SSL_FALSESTART
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLOPT_TCP_FASTOPEN (3)
|
||
|
|
Protocol:
|
||
|
|
- TLS
|
||
|
|
TLS-backend:
|
||
|
|
- Secure Transport
|
||
|
|
Added-in: 7.42.0
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLOPT_SSL_FALSESTART - TLS false start
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#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 starts sending application
|
||
|
|
data before verifying the server's Finished message, thus saving a round trip
|
||
|
|
when performing a full handshake.
|
||
|
|
|
||
|
|
# DEFAULT
|
||
|
|
|
||
|
|
0
|
||
|
|
|
||
|
|
# %PROTOCOLS%
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
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%
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns CURLE_OK if false start is supported by the SSL backend, otherwise
|
||
|
|
returns CURLE_NOT_BUILT_IN.
|