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deps/curl/docs/libcurl/opts/CURLOPT_FTP_USE_EPRT.md

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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_FTP_USE_EPRT
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_FTPPORT (3)
+  - CURLOPT_FTP_USE_EPSV (3)
+---
+
+# NAME
+
+CURLOPT_FTP_USE_EPRT - use EPRT for FTP
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_USE_EPRT, long enabled);
+~~~
+
+# DESCRIPTION
+
+Pass a long. If the value is 1, it tells curl to use the EPRT command when
+doing active FTP downloads (which is enabled by
+CURLOPT_FTPPORT(3)). Using EPRT means that libcurl first attempts to use
+EPRT before using PORT, but if you pass zero to this option, it avoids using
+EPRT, only plain PORT.
+
+The EPRT command is a slightly newer addition to the FTP protocol than PORT
+and is the preferred command to use since it enables IPv6 to be used. 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 as EPRT is necessary
+then.
+
+# DEFAULT
+
+# PROTOCOLS
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode res;
+    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
+
+    /* contact us back, aka "active" FTP */
+    curl_easy_setopt(curl, CURLOPT_FTPPORT, "-");
+
+    /* FTP the way the neanderthals did it */
+    curl_easy_setopt(curl, CURLOPT_FTP_USE_EPRT, 0L);
+
+    res = curl_easy_perform(curl);
+
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# AVAILABILITY
+
+Added in 7.10.5
+
+# RETURN VALUE
+
+Returns CURLE_OK