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CURLOPT_TCP_KEEPCNT(3)	   Library Functions Manual	CURLOPT_TCP_KEEPCNT(3)

NAME
       CURLOPT_TCP_KEEPCNT - Maximum number of TCP keep-alive probes

SYNOPSIS
       #include	<curl/curl.h>

       CURLcode	curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPCNT, long cnt);

DESCRIPTION
       Pass a long. Sets the number of probes to send before dropping the con-
       nection.	 Not  all  operating  systems  support this option.  (Added in
       8.9.0)

       The maximum value this option accepts is	INT_MAX	or whatever your  sys-
       tem allows.  Any	larger value is	capped to this amount.

DEFAULT
       9

PROTOCOLS
       This functionality affects tcp only

EXAMPLE
       int main(void)
       {
	 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);

	   /* maximum number of	keep-alive probes: 3 */
	   curl_easy_setopt(curl, CURLOPT_TCP_KEEPCNT, 3L);

	   curl_easy_perform(curl);
	 }
       }

AVAILABILITY
       Added in	curl 8.9.0

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK	(0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLOPT_TCP_KEEPALIVE(3),   CURLOPT_TCP_KEEPIDLE(3),  CURLOPT_TCP_KEEP-
       INTVL(3)

libcurl				  2025-06-03		CURLOPT_TCP_KEEPCNT(3)

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