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Updated: Thursday, June 13, 2019
 
 

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

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.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+------------------+
       |ATTRIBUTE TYPE | ATTRIBUTE VALUE  |
       +---------------+------------------+
       |Availability   | web/curl         |
       +---------------+------------------+
       |Stability      | Uncommitted      |
       +---------------+------------------+
SEE ALSO
       CURLOPT_USE_SSL(3), CURLOPT_FTPSSLAUTH(3),



NOTES
       This     software     was    built    from    source    available    at
       https://github.com/oracle/solaris-userland.   The  original   community
       source    was    downloaded    from    https://github.com/curl/curl/ar-
       chive/curl-7_64_0.zip

       Further information about this software can be found on the open source
       community website at http://curl.haxx.se/.



libcurl 7.37.0                    19 Jun 2014           CURLOPT_FTP_SSL_CCC(3)