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23 .TH CURLOPT_SSL_FALSESTART 3 "14 Feb 2015" "libcurl 7.41.0" "curl_easy_setopt options"
25 CURLOPT_SSL_FALSESTART \- enable TLS false start
27 #include <curl/curl.h>
29 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_FALSESTART, long enable);
31 Pass a long as parameter set to 1 to enable or 0 to disable.
33 This option determines whether libcurl should use false start during the TLS
34 handshake. False start is a mode where a TLS client will start sending
35 application data before verifying the server's Finished message, thus saving a
36 round trip when performing a full handshake.
40 All TLS based protocols: HTTPS, FTPS, IMAPS, POP3, SMTPS etc.
44 Added in 7.42.0. This option is currently only supported by the NSS and
45 Secure Transport (on iOS 7.0 or later, or OS X 10.9 or later) TLS backends.
47 Returns CURLE_OK if false start is supported by the SSL backend, otherwise
48 returns CURLE_NOT_BUILT_IN.