How Will the World End? Post: 302525267

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curlopt_tcp_keepalive

CURLOPT_TCP_KEEPALIVE(3)				     curl_easy_setopt options					  CURLOPT_TCP_KEEPALIVE(3)

NAME

       CURLOPT_TCP_KEEPALIVE - enable TCP keep-alive probing

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPALIVE, long probe);

DESCRIPTION

       Pass  a	long.  If  set	to  1,	TCP  keepalive	probes will be sent. The delay and frequency of these probes can be controlled by the CUR-
       LOPT_TCP_KEEPIDLE(3) and CURLOPT_TCP_KEEPINTVL(3) options, provided the operating system supports them. Set to 0 (default behavior) to dis-
       able keepalive probes

DEFAULT

       0

PROTOCOLS

       All

EXAMPLE

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

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

	 /* 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_KEEPIDLE(3), CURLOPT_TCP_KEEPINTVL(3),

libcurl 7.54.0							 February 03, 2016					  CURLOPT_TCP_KEEPALIVE(3)