NAME

       CURLOPT_TCP_KEEPIDLE - TCP keep-alive idle time wait

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPIDLE, long delay);

DESCRIPTION

       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.

       The  maximum  value  this  accepts  is 2147483648. Any larger value will be capped to this
       amount.

DEFAULT

       60

PROTOCOLS

       All

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

         /* enable TCP keep-alive for this transfer */
         curl_easy_setopt(curl, CURLOPT_TCP_KEEPALIVE, 1L);

         /* set keep-alive idle time to 120 seconds */
         curl_easy_setopt(curl, CURLOPT_TCP_KEEPIDLE, 120L);

         /* interval time between keep-alive probes: 60 seconds */
         curl_easy_setopt(curl, CURLOPT_TCP_KEEPINTVL, 60L);

         curl_easy_perform(curl);
       }

AVAILABILITY

       Added in 7.25.0

RETURN VALUE

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

SEE ALSO

       CURLOPT_TCP_KEEPALIVE(3), CURLOPT_TCP_KEEPINTVL(3),