Annotation of embedaddon/curl/docs/libcurl/opts/CURLOPT_FTP_SSL_CCC.3, revision 1.1.1.1
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23: .TH CURLOPT_FTP_SSL_CCC 3 "May 31, 2017" "libcurl 7.70.0" "curl_easy_setopt options"
24:
25: .SH NAME
26: CURLOPT_FTP_SSL_CCC \- switch off SSL again with FTP after auth
27: .SH SYNOPSIS
28: #include <curl/curl.h>
29:
30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC,
31: long how);
32: .SH DESCRIPTION
33: If enabled, this option makes libcurl use CCC (Clear Command Channel). It
34: shuts down the SSL/TLS layer after authenticating. The rest of the control
35: channel communication will be unencrypted. This allows NAT routers to follow
36: the FTP transaction. Pass a long using one of the values below
37: .IP CURLFTPSSL_CCC_NONE
38: Don't attempt to use CCC.
39: .IP CURLFTPSSL_CCC_PASSIVE
40: Do not initiate the shutdown, but wait for the server to do it. Do not send a
41: reply.
42: .IP CURLFTPSSL_CCC_ACTIVE
43: Initiate the shutdown and wait for a reply.
44: .SH DEFAULT
45: CURLFTPSSL_CCC_NONE
46: .SH PROTOCOLS
47: FTP
48: .SH EXAMPLE
49: .nf
50: CURL *curl = curl_easy_init();
51: if(curl) {
52: curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
53: curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_CONTROL);
54: /* go back to clear-text FTP after authenticating */
55: curl_easy_setopt(curl, CURLOPT_FTP_SSL_CCC, CURLFTPSSL_CCC_ACTIVE);
56: ret = curl_easy_perform(curl);
57: curl_easy_cleanup(curl);
58: }
59: .fi
60: .SH AVAILABILITY
61: Added in 7.16.1
62: .SH RETURN VALUE
63: Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
64: .SH "SEE ALSO"
65: .BR CURLOPT_USE_SSL "(3), " CURLOPT_FTPSSLAUTH "(3), "
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