DragonFly On-Line Manual Pages

Search: Section:  

CURLOPT_FTP_SSL_CCC(3)              libcurl             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
              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

       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, (long)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

       CURLOPT_USE_SSL(3), CURLOPT_FTPSSLAUTH(3),

ibcurl 8.1.2                    April 26, 2023          CURLOPT_FTP_SSL_CCC(3)

Search: Section: