mirror/curl
2
0
Fork 0
mirror of https://github.com/curl/curl.git synced 2025-01-30 14:22:33 +08:00
Code Issues Packages Projects Releases Wiki Activity
3ff3c0925d
curl/docs/libcurl/opts/CURLOPT_FTP_SSL_CCC.md
Daniel Stenberg b935fd4a07
docs: make each libcurl man specify protocol(s) 
The mandatory header now has a mandatory list of protocols for which the
manpage is relevant.

Most man pages already has a "PROTOCOLS" section, but this introduces a
stricter way to specify the relevant protocols.

cd2nroff verifies that at least one protocol is mentioned (which can be
`*`).

This information is not used just yet, but A) the PROTOCOLS section can
now instead get generated and get a unified wording across all manpages
and B) this allows us to more reliably filter/search for protocol
specific manpages/options.

Closes #13166
2024-03-21 15:27:06 +01:00

1.6 KiB
Raw Blame History

c SPDX-License-Identifier Title Section Source Protocol See-also
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. curl CURLOPT_FTP_SSL_CCC 3 libcurl
FTP
CURLOPT_FTPSSLAUTH (3)
CURLOPT_PROTOCOLS_STR (3)
CURLOPT_USE_SSL (3)

NAME

CURLOPT_FTP_SSL_CCC - switch off SSL again with FTP after auth

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC,
                          long how);

DESCRIPTION

If enabled, this option makes libcurl use CCC (Clear Command Channel). It shuts down the SSL/TLS layer after authenticating. The rest of the control channel communication remains unencrypted. This allows NAT routers to follow the FTP transaction. Pass a long using one of the values below

CURLFTPSSL_CCC_NONE

do not attempt to use CCC.

CURLFTPSSL_CCC_PASSIVE

Do not initiate the shutdown, but wait for the server to do it. Do not send a reply.

CURLFTPSSL_CCC_ACTIVE

Initiate the shutdown and wait for a reply.

DEFAULT

CURLFTPSSL_CCC_NONE

PROTOCOLS

FTP

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
    curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_CONTROL);
    /* go back to clear-text FTP after authenticating */
    curl_easy_setopt(curl, CURLOPT_FTP_SSL_CCC, (long)CURLFTPSSL_CCC_ACTIVE);
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

AVAILABILITY

Added in 7.16.1

RETURN VALUE

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.