CURLOPT_TCP_KEEPIDLE (3) - Linux Man Pages
CURLOPT_TCP_KEEPIDLE: set TCP keep-alive idle time wait
CURLOPT_TCP_KEEPIDLE - set TCP keep-alive idle time wait
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPIDLE, long delay);
Pass a long. Sets the delay
, in seconds, that the operating system will
wait while the connection is idle before sending keepalive probes. Not all
operating systems support this option.
Added in 7.25.0
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.