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52 lines
1.5 KiB
Groff
52 lines
1.5 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLOPT_FTP_SSL_CCC.md
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.TH CURLOPT_FTP_SSL_CCC 3 "2024-06-01" libcurl
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.SH NAME
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CURLOPT_FTP_SSL_CCC \- switch off SSL again with FTP after auth
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC,
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long how);
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.fi
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.SH DESCRIPTION
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If enabled, this option makes libcurl use CCC (Clear Command Channel). It
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shuts down the SSL/TLS layer after authenticating. The rest of the control
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channel communication remains unencrypted. This allows NAT routers to follow
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the FTP transaction. Pass a long using one of the values below
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.IP CURLFTPSSL_CCC_NONE
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do not attempt to use CCC.
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.IP CURLFTPSSL_CCC_PASSIVE
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Do not initiate the shutdown, but wait for the server to do it. Do not send a
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reply.
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.IP CURLFTPSSL_CCC_ACTIVE
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Initiate the shutdown and wait for a reply.
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.SH DEFAULT
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CURLFTPSSL_CCC_NONE
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.SH PROTOCOLS
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FTP
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.SH EXAMPLE
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.nf
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
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curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_CONTROL);
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/* go back to clear-text FTP after authenticating */
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curl_easy_setopt(curl, CURLOPT_FTP_SSL_CCC, (long)CURLFTPSSL_CCC_ACTIVE);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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.fi
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.SH AVAILABILITY
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Added in 7.16.1
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH SEE ALSO
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.BR CURLOPT_FTPSSLAUTH (3),
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.BR CURLOPT_PROTOCOLS_STR (3),
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.BR CURLOPT_USE_SSL (3)
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