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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_SSL_FALSESTART
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_TCP_FASTOPEN (3)
+---
+
+# NAME
+
+CURLOPT_SSL_FALSESTART - TLS false start
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_FALSESTART, long enable);
+~~~
+
+# DESCRIPTION
+
+Pass a long as parameter set to 1L to enable or 0 to disable.
+
+This option determines whether libcurl should use false start during the TLS
+handshake. False start is a mode where a TLS client starts sending application
+data before verifying the server's Finished message, thus saving a round trip
+when performing a full handshake.
+
+# DEFAULT
+
+0
+
+# PROTOCOLS
+
+All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+    curl_easy_setopt(curl, CURLOPT_SSL_FALSESTART, 1L);
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# AVAILABILITY
+
+Added in 7.42.0. This option is currently only supported by the Secure
+Transport (on iOS 7.0 or later, or OS X 10.9 or later) TLS backend.
+
+# RETURN VALUE
+
+Returns CURLE_OK if false start is supported by the SSL backend, otherwise
+returns CURLE_NOT_BUILT_IN.