GNURLOPT_FTPPORT(3)

🌸 NAME 🌸

CURLOPT_FTPPORT - make FTP transfer active ✨

Okay bestie, welcome to the GNURLOPT_FTPPORT(3) manual page — it's giving "let's flip FTP into active mode" and honestly? Iconic. Slay. 💅

✨ SYNOPSIS ✨

#include <gnurl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTPPORT, char *spec);

💖 DESCRIPTION 💖

So here's the tea: you pass a pointer to a null-terminated string as the parameter (spec, hiiii 🫶). It specifies that the FTP transfer will be made actively, and the given string will be used to get the IP address to use for the FTP PORT instruction.

The PORT instruction tells the remote server to connect to our specified IP address. The string may be:

• a plain IP address
• a host name
• a network interface name (under Unix)
• or just a '-' symbol to let the library use your system's default IP address

Default FTP operations are passive, and thus won't use PORT. No active era unless you explicitly ask for it, periodt. 💀

The address can be followed by a ':' to specify a port, optionally followed by a '-' to specify a port range. If the port specified is 0, the operating system will pick a free port. If a range is provided and all ports in the range are not available, libcurl will report CURLE_FTP_PORT_FAILED for the handle. Invalid port/range settings are ignored. IPv6 addresses followed by a port or portrange have to be in brackets. IPv6 addresses without port/range specifier can be in brackets. 🦋

Examples with specified ports:

eth0:0
192.168.1.2:32000-33000
curl.se:32123
[::1]:1234-4567

You disable PORT again and go back to using the passive version by setting this option to NULL. Literally just NULL and the active moment is over. 🙈

The application does not have to keep the string around after setting this option. Set it, forget it, live your life. ✨

🌙 DEFAULT 🌙

NULL — lowkey obsessed with the simplicity. 🎀

🧚 PROTOCOLS 🧚

FTP

🔥 EXAMPLE 🔥

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/old-server/file.txt");
  curl_easy_setopt(curl, CURLOPT_FTPPORT, "-");
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

⭐ AVAILABILITY ⭐

Port range support was added in 7.19.5 ✨

💅 RETURN VALUE 💅

Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space. That's the whole vibe check, no cap. 💖

🎀 SEE ALSO 🎀

• CURLOPT_FTP_USE_EPRT(3)
• CURLOPT_FTP_USE_EPSV(3)

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mwah 💋 this page is from libcurl 7.37.0, dated 17 Jun 2014, and it's the GNURLOPT_FTPPORT(3) manual page — bye bestie!