easy:SetOpt_FTP_SSL_CCC -- switch off SSL again with FTP after auth
Synopsis
easy:SetOpt_FTP_SSL_CCC(how)
Function
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 value 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.