#include <openssl/ssl.h> void SSL_CTX_flush_sessions(SSL_CTX *ctx, long tm);
The parameter tm specifies the time which should be used for the expiration test, in most cases the actual time given by time(0) will be used.
SSL_CTX_flush_sessions() will only check sessions stored in the internal cache. When a session is found and removed, the remove_session_cb is however called to synchronize with the external cache (see SSL_CTX_sess_set_get_cb(3)).
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