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CURLOPT_TCP_KEEPIDLE(3) Library Functions Manual CURLOPT_TCP_KEEPIDLE(3) NAME CURLOPT_TCP_KEEPIDLE - TCP keep-alive idle time wait SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPIDLE, long delay); DESCRIPTION Pass a long. Sets the delay, in seconds, to wait while the connection is idle before sending keepalive probes. Not all operating systems sup- port this option. The maximum value this accepts is 2147483648. Any larger value is capped to this amount. DEFAULT 60 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 7.25.0 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_KEEPCNT(3), CURLOPT_TCP_KEEP- INTVL(3) libcurl 2025-06-03 CURLOPT_TCP_KEEPIDLE(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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