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        !            23: .TH CURLOPT_TFTP_NO_OPTIONS 3 "April 06, 2016" "libcurl 7.70.0" "curl_easy_setopt options"
        !            24: 
        !            25: .SH NAME
        !            26: CURLOPT_TFTP_NO_OPTIONS \- Do not send TFTP options requests.
        !            27: .SH SYNOPSIS
        !            28: #include <curl/curl.h>
        !            29: 
        !            30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TFTP_NO_OPTIONS, long onoff);
        !            31: .SH DESCRIPTION
        !            32: Set \fIonoff\fP to 1L to exclude all TFTP options defined in RFC2347, RFC2348
        !            33: and RFC2349 from read and write requests (RRQs/WRQs).
        !            34: 
        !            35: This option improves interop with some legacy servers that do not acknowledge
        !            36: or properly implement TFTP options. When this option is used
        !            37: \fICURLOPT_TFTP_BLKSIZE(3)\fP is ignored.
        !            38: .SH DEFAULT
        !            39: 0
        !            40: .SH PROTOCOLS
        !            41: TFTP
        !            42: .SH EXAMPLE
        !            43: .nf
        !            44: size_t write_callback(char *ptr, size_t size, size_t nmemb, void *fp)
        !            45: {
        !            46:   return fwrite(ptr, size, nmemb, (FILE *)fp);
        !            47: }
        !            48: 
        !            49: CURL *curl = curl_easy_init();
        !            50: if(curl) {
        !            51:   FILE *fp = fopen("foo.bin", "wb");
        !            52:   if(fp) {
        !            53:     curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)fp);
        !            54:     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
        !            55: 
        !            56:     curl_easy_setopt(curl, CURLOPT_URL, "tftp://example.com/foo.bin");
        !            57: 
        !            58:     /* do not send TFTP options requests */
        !            59:     curl_easy_setopt(curl, CURLOPT_TFTP_NO_OPTIONS, 1L);
        !            60: 
        !            61:     /* Perform the request */
        !            62:     curl_easy_perform(curl);
        !            63: 
        !            64:     fclose(fp);
        !            65:   }
        !            66:   curl_easy_cleanup(curl);
        !            67: }
        !            68: .fi
        !            69: .SH AVAILABILITY
        !            70: Added in 7.48.0
        !            71: .SH RETURN VALUE
        !            72: Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.