CURLOPT_TCP_KEEPINTVL(3)

1CURLOPT_TCP_KEEPINTVL(3)            libcurl           CURLOPT_TCP_KEEPINTVL(3)
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NAME

6       CURLOPT_TCP_KEEPINTVL - TCP keep-alive interval
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SYNOPSIS

9       #include <curl/curl.h>
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11       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPINTVL, long interval);
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DESCRIPTION

14       Pass  a  long. Sets the interval, in seconds, that the operating system
15       will wait between sending keepalive probes. Not all  operating  systems
16       support this option. (Added in 7.25.0)
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18       The  maximum value this accepts is 2147483648. Any larger value will be
19       capped to this amount.
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DEFAULT

22       60
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PROTOCOLS

25       All
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EXAMPLE

28       CURL *curl = curl_easy_init();
29       if(curl) {
30         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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32         /* enable TCP keep-alive for this transfer */
33         curl_easy_setopt(curl, CURLOPT_TCP_KEEPALIVE, 1L);
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35         /* set keep-alive idle time to 120 seconds */
36         curl_easy_setopt(curl, CURLOPT_TCP_KEEPIDLE, 120L);
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38         /* interval time between keep-alive probes: 60 seconds */
39         curl_easy_setopt(curl, CURLOPT_TCP_KEEPINTVL, 60L);
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41         curl_easy_perform(curl);
42       }
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AVAILABILITY

45       Always
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RETURN VALUE

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