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23 .TH CURLOPT_TCP_FASTOPEN 3 "16 Feb 2016" "libcurl 7.49.0" "curl_easy_setopt options"
25 CURLOPT_TCP_FASTOPEN \- enable TCP Fast Open
27 #include <curl/curl.h>
29 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_FASTOPEN, long enable);
31 Pass a long as parameter set to 1 to enable or 0 to disable.
33 TCP Fast Open (RFC7413) is a mechanism that allows data to be carried in the
34 SYN and SYN-ACK packets and consumed by the receiving end during the initial
35 connection handshake, saving up to one full round-trip time (RTT).
43 Added in 7.49.0. This option is currently only supported on Linux and OS X
46 Returns CURLE_OK if fast open is supported by the operating system, otherwise
47 returns CURLE_NOT_BUILT_IN.