CURLOPT_TCP_FASTOPEN(3) curl_easy_setopt options CURLOPT_TCP_FASTOPEN(3)
NAME
CURLOPT_TCP_FASTOPEN - enable TCP Fast Open
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_FASTOPEN, long enable);
DESCRIPTION
Pass a long as parameter set to 1 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 dur-
ing the initial connection handshake, saving up to one full round-trip time (RTT).
DEFAULT
0
PROTOCOLS
All
EXAMPLE
TODO
AVAILABILITY
Added in 7.49.0. This option is currently only supported on Linux and OS X El Capitan.
RETURN VALUE
Returns CURLE_OK if fast open is supported by the operating system, otherwise returns CURLE_NOT_BUILT_IN.
libcurl 7.54.0 April 03, 2016 CURLOPT_TCP_FASTOPEN(3)
