CURLOPT_TCP_KEEPINTVL(3)   curl_easy_setopt options   CURLOPT_TCP_KEEPINTVL(3)

NAME
       CURLOPT_TCP_KEEPINTVL - set TCP keep-alive interval

SYNOPSIS
       #include <curl/curl.h>

       CURLcode  curl_easy_setopt(CURL  *handle,  CURLOPT_TCP_KEEPINTVL,  long
       interval);

DESCRIPTION
       Pass a long. Sets the interval, in seconds, that the  operating  system
       will  wait  between sending keepalive probes. Not all operating systems
       support this option. (Added in 7.25.0)

DEFAULT
       60

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);

         /* 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
       Always

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

SEE ALSO
       CURLOPT_TCP_KEEPALIVE(3), CURLOPT_TCP_KEEPIDLE(3),

libcurl 7.54.0                 January 02, 2017       CURLOPT_TCP_KEEPINTVL(3)