67 lines
1.4 KiB
Markdown
67 lines
1.4 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_SSL_SESSIONID_CACHE
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_DNS_CACHE_TIMEOUT (3)
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- CURLOPT_MAXAGE_CONN (3)
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- CURLOPT_MAXLIFETIME_CONN (3)
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- CURLOPT_SSLVERSION (3)
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---
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# NAME
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CURLOPT_SSL_SESSIONID_CACHE - use the SSL session-ID cache
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_SESSIONID_CACHE,
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long enabled);
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~~~
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# DESCRIPTION
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Pass a long set to 0 to disable libcurl's use of SSL session-ID caching. Set
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this to 1 to enable it. By default all transfers are done using the cache
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enabled. While nothing ever should get hurt by attempting to reuse SSL
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session-IDs, there seem to be or have been broken SSL implementations in the
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wild that may require you to disable this in order for you to succeed.
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# DEFAULT
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1
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# PROTOCOLS
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All TLS-based
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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/* switch off session-id use! */
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curl_easy_setopt(curl, CURLOPT_SSL_SESSIONID_CACHE, 0L);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.16.0
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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