Daniel Stenberg 5a488251f7

- make DEFAULT sections less repetitive

- make historic mentions use HISTORY

- generate the protocols section on `# %PROTOCOLS%` instead of guessing
  where to put it

- generate the availability section on `# %AVAILABILITY%` instead of
  guessing where to put it

- make the protocols section more verbose

Closes #14227

2024-07-19 17:03:25 +02:00

1.6 KiB

Raw Blame History

SPDX-License-Identifier

Title

Section

Source

Protocol

See-also

Added-in

curl

CURLOPT_FTP_SKIP_PASV_IP

libcurl

FTP

CURLOPT_FTPPORT (3)

CURLOPT_FTP_USE_EPRT (3)

7.15.0

NAME

CURLOPT_FTP_SKIP_PASV_IP - ignore the IP address in the PASV response

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SKIP_PASV_IP, long skip);

DESCRIPTION

Pass a long. If skip is set to 1, it instructs libcurl to not use the IP address the server suggests in its 227-response to libcurl's PASV command when libcurl connects the data connection. Instead libcurl reuses the same IP address it already uses for the control connection. It still uses the port number from the 227-response.

This option allows libcurl to work around broken server installations or funny network setups that due to NATs, firewalls or incompetence report the wrong IP address. Setting this option also reduces the risk for various sorts of client abuse by malicious servers.

This option has no effect if PORT, EPRT or EPSV is used instead of PASV.

DEFAULT

1 since 7.74.0, was 0 before then.

%PROTOCOLS%

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");

    /* please ignore the IP in the PASV response */
    curl_easy_setopt(curl, CURLOPT_FTP_SKIP_PASV_IP, 1L);
    res = curl_easy_perform(curl);

    curl_easy_cleanup(curl);
  }
}

%AVAILABILITY%

RETURN VALUE

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

1.6 KiB Raw Blame History