eefcc1bda4
curldown is this new file format for libcurl man pages. It is markdown inspired with differences: - Each file has a set of leading headers with meta-data - Supports a small subset of markdown - Uses .md file extensions for editors/IDE/GitHub to treat them nicely - Generates man pages very similar to the previous ones - Generates man pages that still convert nicely to HTML on the website - Detects and highlights mentions of curl symbols automatically (when their man page section is specified) tools: - cd2nroff: converts from curldown to nroff man page - nroff2cd: convert an (old) nroff man page to curldown - cdall: convert many nroff pages to curldown versions - cd2cd: verifies and updates a curldown to latest curldown This setup generates .3 versions of all the curldown versions at build time. CI: Since the documentation is now technically markdown in the eyes of many things, the CI runs many more tests and checks on this documentation, including proselint, link checkers and tests that make sure we capitalize the first letter after a period... Closes #12730
79 lines
1.6 KiB
Markdown
79 lines
1.6 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_FTP_SSL_CCC
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_FTPSSLAUTH (3)
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- CURLOPT_PROTOCOLS_STR (3)
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- CURLOPT_USE_SSL (3)
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---
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# NAME
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CURLOPT_FTP_SSL_CCC - switch off SSL again with FTP after auth
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC,
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long how);
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~~~
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# DESCRIPTION
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If enabled, this option makes libcurl use CCC (Clear Command Channel). It
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shuts down the SSL/TLS layer after authenticating. The rest of the control
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channel communication remains unencrypted. This allows NAT routers to follow
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the FTP transaction. Pass a long using one of the values below
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## CURLFTPSSL_CCC_NONE
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do not attempt to use CCC.
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## CURLFTPSSL_CCC_PASSIVE
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Do not initiate the shutdown, but wait for the server to do it. Do not send a
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reply.
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## CURLFTPSSL_CCC_ACTIVE
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Initiate the shutdown and wait for a reply.
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# DEFAULT
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CURLFTPSSL_CCC_NONE
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# PROTOCOLS
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FTP
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
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curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_CONTROL);
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/* go back to clear-text FTP after authenticating */
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curl_easy_setopt(curl, CURLOPT_FTP_SSL_CCC, (long)CURLFTPSSL_CCC_ACTIVE);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.16.1
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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