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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 en-
       able);

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).

DEFAULT
       0

PROTOCOLS
       All

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl)	{
	 curl_easy_setopt(curl,	CURLOPT_URL, "http://example.com");
	 curl_easy_setopt(curl,	CURLOPT_TCP_FASTOPEN, 1L);
	 curl_easy_perform(curl);
       }

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	7.54.1			 May 15, 2017	       CURLOPT_TCP_FASTOPEN(3)

NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE

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