curl/docs/libcurl/opts/CURLOPT_TCP_KEEPIDLE.3

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.TH CURLOPT_TCP_KEEPIDLE 3 "19 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_TCP_KEEPIDLE \- TCP keep-alive idle time wait
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPIDLE, long delay);
.fi
.SH DESCRIPTION
Pass a long. Sets the \fIdelay\fP, 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.
.SH DEFAULT
60
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
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);
}
.fi
.SH AVAILABILITY
Added in 7.25.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_TCP_KEEPALIVE "(3), " CURLOPT_TCP_KEEPINTVL "(3), "