CURLOPT_FTP_SSL_CCC - switch off SSL again with FTP after auth
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC, long how);
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 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, 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 Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from https://curl.se/down- load/curl-7.83.1.tar.bz2. Further information about this software can be found on the open source community website at http://curl.haxx.se/. libcurl 7.83.1 November 26, 2021 CURLOPT_FTP_SSL_CCC(3)