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3rd-party/curl-7.52.1/docs/libcurl/opts/CURLOPT_PROXY_SSLVERSION.3

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+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
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+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
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+.\" *
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+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_PROXY_SSLVERSION 3 "16 Nov 2016" "libcurl 7.52.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_PROXY_SSLVERSION \- set preferred proxy TLS/SSL version
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLVERSION, long version);
+.SH DESCRIPTION
+Pass a long as parameter to control which version of SSL/TLS to attempt to use
+when connecting to an HTTPS proxy.
+
+Use one of the available defines for this purpose. The available options are:
+.RS
+.IP CURL_SSLVERSION_DEFAULT
+The default action. This will attempt to figure out the remote SSL protocol
+version.
+.IP CURL_SSLVERSION_TLSv1
+TLSv1.x
+.IP CURL_SSLVERSION_TLSv1_0
+TLSv1.0
+.IP CURL_SSLVERSION_TLSv1_1
+TLSv1.1
+.IP CURL_SSLVERSION_TLSv1_2
+TLSv1.2
+.IP CURL_SSLVERSION_TLSv1_3
+TLSv1.3
+.RE
+.SH DEFAULT
+CURL_SSLVERSION_DEFAULT
+.SH PROTOCOLS
+All
+.SH EXAMPLE
+.nf
+CURL *curl = curl_easy_init();
+if(curl) {
+  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+  /* ask libcurl to use TLS version 1.0 or later */
+  curl_easy_setopt(curl, CURLOPT_PROXY_SSLVERSION, CURL_SSLVERSION_TLSv1);
+
+  /* Perform the request */
+  curl_easy_perform(curl);
+}
+.fi
+.SH AVAILABILITY
+Added in 7.52.0
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
+.SH "SEE ALSO"
+.BR CURLOPT_USE_SSL "(3), " CURLOPT_HTTP_VERSION "(3), "
+.BR CURLOPT_IPRESOLVE "(3) " CURLOPT_SSLVERSION "(3), "
+