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),