curl / libcurl / API / curl_easy_setopt / CURLOPT_TFTP_NO_OPTIONS

CURLOPT_TFTP_NO_OPTIONS explained

Name

CURLOPT_TFTP_NO_OPTIONS - send no TFTP options requests

Synopsis

#include <curl/curl.h>
 
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TFTP_NO_OPTIONS, long onoff);

Description

Set onoff to 1L to exclude all TFTP options defined in RFC 2347, RFC 2348 and RFC 2349 from read and write requests.

This option improves interoperability with legacy servers that do not acknowledge or properly implement TFTP options. When this option is used CURLOPT_TFTP_BLKSIZE is ignored.

Default

Protocols

This functionality affects tftp only

Example

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

Availability

Added in curl 7.48.0

Return value

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