curl/docs/libcurl/opts/CURLOPT_TCP_FASTOPEN.3
Daniel Stenberg 12a2ed970f
opt-docs: verify man page sections + order
In every libcurl option man page there are now 8 mandatory sections that
must use the right name in the correct order and test 1173 verifies
this. Only 14 man pages needed adjustments.

The sections and the order is as follows:

 - NAME
 - SYNOPSIS
 - DESCRIPTION
 - PROTOCOLS
 - EXAMPLE
 - AVAILABILITY
 - RETURN VALUE
 - SEE ALSO

Reviewed-by: Daniel Gustafsson
Closes #7656
2021-09-04 11:27:46 +02:00

57 lines
2.1 KiB
Groff

.\" **************************************************************************
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.TH CURLOPT_TCP_FASTOPEN 3 "16 Feb 2016" "libcurl 7.49.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_TCP_FASTOPEN \- enable TCP Fast Open
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_FASTOPEN, long enable);
.SH DESCRIPTION
Pass a long as parameter set to 1L to enable or 0 to disable.
TCP Fast Open (RFC7413) is a mechanism that allows data to be carried in the
SYN and SYN-ACK packets and consumed by the receiving end during the initial
connection handshake, saving up to one full round-trip time (RTT).
.SH DEFAULT
0
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_TCP_FASTOPEN, 1L);
curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Added in 7.49.0. This option is currently only supported on Linux and OS X
El Capitan.
.SH RETURN VALUE
Returns CURLE_OK if fast open is supported by the operating system, otherwise
returns CURLE_NOT_BUILT_IN.
.SH SEE ALSO
.BR CURLOPT_SSL_FALSESTART "(3), "