x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
CURLOPT_FTP_USE_EPSV(3) libcurl CURLOPT_FTP_USE_EPSV(3)
NAME
CURLOPT_FTP_USE_EPSV - use EPSV for FTP
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_USE_EPSV, long epsv);
DESCRIPTION
Pass epsv as a long. If the value is 1, it tells curl to use the EPSV
command when doing passive FTP downloads (which it does by default).
Using EPSV means that libcurl first attempts to use the EPSV command
before using PASV. If you pass zero to this option, it does not use
EPSV, only plain PASV.
The EPSV command is a slightly newer addition to the FTP protocol than
PASV and is the preferred command to use since it enables IPv6 to be
used. Very old FTP servers might not support it, which is why libcurl
has a fallback mechanism. Sometimes that fallback is not enough and
then this option might come handy.
If the server is an IPv6 host, this option has no effect.
DEFAULT
1
PROTOCOLS
FTP
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/old-server/file.txt");
/* let's shut off this modern feature */
curl_easy_setopt(curl, CURLOPT_FTP_USE_EPSV, 0L);
ret = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
AVAILABILITY
Along with FTP
RETURN VALUE
Returns CURLE_OK if FTP is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO
CURLOPT_FTP_USE_EPRT(3), CURLOPT_FTPPORT(3)
ibcurl 8.4.0 September 26, 2023 CURLOPT_FTP_USE_EPSV(3)
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