DragonFly On-Line Manual Pages

CURLOPT_TCP_KEEPINTVL(3)            libcurl           CURLOPT_TCP_KEEPINTVL(3)

NAME
       CURLOPT_TCP_KEEPINTVL - 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)

       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
       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),

ibcurl 8.1.2                    April 26, 2023        CURLOPT_TCP_KEEPINTVL(3)