**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
**************************************************************************

CURLOPT_TFTP_NO_OPTIONS - Do not send TFTP options requests. #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TFTP_NO_OPTIONS, long onoff); Set onoff to 1L to exclude all TFTP options defined in RFC2347, RFC2348 and RFC2349 from read and write requests (RRQs/WRQs). This option improves interop with some legacy servers that do not acknowledge or properly implement TFTP options. When this option is used CURLOPT_TFTP_BLKSIZE(3) is ignored. 0 TFTP

size_t write_callback(char *ptr, size_t size, size_t nmemb, void *fp)
{
 return fwrite(ptr, size, nmemb, (FILE *)fp);
}

CURL *curl = curl_easy_init();
if(curl) {
 FILE *fp = fopen("foo.bin", "wb");
 if(fp) {
 curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)fp);
 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);

 curl_easy_setopt(curl, CURLOPT_URL, "tftp://example.com/foo.bin");

 /* do not send TFTP options requests */
 curl_easy_setopt(curl, CURLOPT_TFTP_NO_OPTIONS, 1L);

 /* Perform the request */
 curl_easy_perform(curl);

 fclose(fp);
 }
 curl_easy_cleanup(curl);
}

Added in 7.48.0 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.