DOKK / manpages / debian 11 / libcurl4-doc / CURLOPT_TCP_KEEPINTVL.3.en
CURLOPT_TCP_KEEPINTVL(3) curl_easy_setopt options CURLOPT_TCP_KEEPINTVL(3)

CURLOPT_TCP_KEEPINTVL - set TCP keep-alive interval

#include <curl/curl.h>

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

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)

60

All

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); }

Always

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

CURLOPT_TCP_KEEPALIVE(3), CURLOPT_TCP_KEEPIDLE(3),

November 4, 2020 libcurl 7.74.0