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| .TH CURLOPT_FTP_SSL_CCC 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options" |
| .SH NAME |
| CURLOPT_FTP_SSL_CCC \- switch off SSL again with FTP after auth |
| .SH SYNOPSIS |
| #include <curl/curl.h> |
| |
| CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC, |
| long how); |
| .SH 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 |
| .IP CURLFTPSSL_CCC_NONE |
| Don't attempt to use CCC. |
| .IP CURLFTPSSL_CCC_PASSIVE |
| Do not initiate the shutdown, but wait for the server to do it. Do not send a |
| reply. |
| .IP CURLFTPSSL_CCC_ACTIVE |
| Initiate the shutdown and wait for a reply. |
| .SH DEFAULT |
| CURLFTPSSL_CCC_NONE |
| .SH PROTOCOLS |
| FTP |
| .SH EXAMPLE |
| .nf |
| 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); |
| } |
| .fi |
| .SH AVAILABILITY |
| Added in 7.16.1 |
| .SH RETURN VALUE |
| Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. |
| .SH "SEE ALSO" |
| .BR CURLOPT_USE_SSL "(3), " CURLOPT_FTPSSLAUTH "(3), " |
