table of contents
CURLOPT_FTP_SSL_CCC(3) | curl_easy_setopt options | CURLOPT_FTP_SSL_CCC(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 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¶
CURL *curl = curl_easy_init(); if(curl) {
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, CURLFTPSSL_CCC_ACTIVE);
ret = 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.
SEE ALSO¶
November 4, 2020 | libcurl 7.76.1 |