CURLOPT_FTP_SSL_CCC (3) Linux Manual Page

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 will be unencrypted. This allows NAT routers to follow the FTP transaction. Pass a long using one of the values below

CURLFTPSSL_CCC_NONE: Don’t 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

TODO

Availability

Added in 7.16.1

Return Value

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