Provided by: libcurl4-doc_8.9.1-2ubuntu2.1_all
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
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO
CURLOPT_FTPSSLAUTH(3), CURLOPT_PROTOCOLS_STR(3), CURLOPT_USE_SSL(3)