Tribblix: manual page: CURLOPT

CURLOPT_FTPSSLAUTH(3) Introduction to Library Functions

NAME

CURLOPT_FTPSSLAUTH - order in which to attempt TLS vs SSL

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTPSSLAUTH, long order);

DESCRIPTION

Pass a long using one of the values from below, to alter how libcurl
issues "AUTH TLS" or "AUTH SSL" when FTP over SSL is activated. This
is only interesting if CURLOPT_USE_SSL(3) is also set.

Possible order values:

CURLFTPAUTH_DEFAULT
Allow libcurl to decide.

CURLFTPAUTH_SSL
Try "AUTH SSL" first, and only if that fails try "AUTH TLS".

CURLFTPAUTH_TLS
Try "AUTH TLS" first, and only if that fails try "AUTH SSL".

DEFAULT

CURLFTPAUTH_DEFAULT

PROTOCOLS

This functionality affects ftp only

EXAMPLE

int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode result;
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_TRY);
/* funny server, ask for SSL before TLS */
curl_easy_setopt(curl, CURLOPT_FTPSSLAUTH, CURLFTPAUTH_SSL);
result = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}

HISTORY

CURLFTPAUTH_* enums became long types in 8.16.0, prior to this
version a long cast was necessary when passed to curl_easy_setopt(3).

AVAILABILITY

Added in curl 7.12.2

RETURN VALUE

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error
occurred, see libcurl-errors(3).