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CURLOPT_SSL_SESSIONID_CACHE(3)                        curl_easy_setopt options

NAME

CURLOPT_SSL_SESSIONID_CACHE - enable/disable use of the SSL session-ID cache

SYNOPSIS

#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_SESSIONID_CACHE, long enabled);

DESCRIPTION

Pass a long set to 0 to disable libcurl's use of SSL session-ID caching. Set this to 1 to enable it. By default all transfers are done using the cache enabled. While nothing ever should get hurt by attempting to reuse SSL session-IDs, there seem to be or have been broken SSL implementations in the wild that may require you to disable this in order for you to succeed.

DEFAULT

1

PROTOCOLS

All TLS-based

EXAMPLE

CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/"); /* switch off session-id use! */ curl_easy_setopt(curl, CURLOPT_SSL_SESSIONID_CACHE, 0L); ret = curl_easy_perform(curl); curl_easy_cleanup(curl); }

AVAILABILITY

Added in 7.16.0

RETURN VALUE

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

SEE ALSO

CURLOPT_DNS_CACHE_TIMEOUT(3), CURLOPT_SSLVERSION(3), libcurl 7.65.1 May 31, 2017 CURLOPT_SSL_SESSIONID_CACHE(3)

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