Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
CURLOPT_FTP_SSL_CCC(3)	   Library Functions Manual	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	remains	 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
       This functionality affects ftp only

EXAMPLE
       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   CURLcode res;
	   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);
	   res = curl_easy_perform(curl);
	   curl_easy_cleanup(curl);
	 }
       }

AVAILABILITY
       Added in	curl 7.16.1

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK	(0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLOPT_FTPSSLAUTH(3), CURLOPT_PROTOCOLS_STR(3),	CURLOPT_USE_SSL(3)

libcurl				  2025-06-03		CURLOPT_FTP_SSL_CCC(3)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=CURLOPT_FTP_SSL_CCC&sektion=3&manpath=FreeBSD+Ports+14.3.quarterly>

home | help