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                     23: .TH CURLOPT_FTP_SSL_CCC 3 "May 31, 2017" "libcurl 7.70.0" "curl_easy_setopt options"
                     24: 
                     25: .SH NAME
                     26: CURLOPT_FTP_SSL_CCC \- switch off SSL again with FTP after auth
                     27: .SH SYNOPSIS
                     28: #include <curl/curl.h>
                     29: 
                     30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC,
                     31:                           long how);
                     32: .SH DESCRIPTION
                     33: If enabled, this option makes libcurl use CCC (Clear Command Channel). It
                     34: shuts down the SSL/TLS layer after authenticating. The rest of the control
                     35: channel communication will be unencrypted. This allows NAT routers to follow
                     36: the FTP transaction. Pass a long using one of the values below
                     37: .IP CURLFTPSSL_CCC_NONE
                     38: Don't attempt to use CCC.
                     39: .IP CURLFTPSSL_CCC_PASSIVE
                     40: Do not initiate the shutdown, but wait for the server to do it. Do not send a
                     41: reply.
                     42: .IP CURLFTPSSL_CCC_ACTIVE
                     43: Initiate the shutdown and wait for a reply.
                     44: .SH DEFAULT
                     45: CURLFTPSSL_CCC_NONE
                     46: .SH PROTOCOLS
                     47: FTP
                     48: .SH EXAMPLE
                     49: .nf
                     50: CURL *curl = curl_easy_init();
                     51: if(curl) {
                     52:   curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
                     53:   curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_CONTROL);
                     54:   /* go back to clear-text FTP after authenticating */
                     55:   curl_easy_setopt(curl, CURLOPT_FTP_SSL_CCC, CURLFTPSSL_CCC_ACTIVE);
                     56:   ret = curl_easy_perform(curl);
                     57:   curl_easy_cleanup(curl);
                     58: }
                     59: .fi
                     60: .SH AVAILABILITY
                     61: Added in 7.16.1
                     62: .SH RETURN VALUE
                     63: Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
                     64: .SH "SEE ALSO"
                     65: .BR CURLOPT_USE_SSL "(3), " CURLOPT_FTPSSLAUTH "(3), "