SSL_FREE(3)               BSD Library Functions Manual               SSL_FREE(3)

     SSL_free — free an allocated SSL structure

     #include <openssl/ssl.h>

     SSL_free(SSL *ssl);

     SSL_free() decrements the reference count of ssl, and removes the SSL
     structure pointed to by ssl and frees up the allocated memory if the
     reference count has reached 0.  If ssl is a NULL pointer, no action occurs.

     SSL_free() also calls the free(3)ing procedures for indirectly affected
     items, if applicable: the buffering BIO, the read and write BIOs, cipher
     lists specially created for this ssl, the SSL_SESSION.  Do not explicitly
     free these indirectly freed up items before or after calling SSL_free(), as
     trying to free things twice may lead to program failure.

     The ssl session has reference counts from two users: the SSL object, for
     which the reference count is removed by SSL_free() and the internal session
     cache.  If the session is considered bad, because SSL_shutdown(3) was not
     called for the connection and SSL_set_shutdown(3) was not used to set the
     SSL_SENT_SHUTDOWN state, the session will also be removed from the session
     cache as required by RFC2246.

     ssl(3), SSL_clear(3), SSL_new(3), SSL_set_shutdown(3), SSL_shutdown(3)

     SSL_free() appeared in SSLeay 0.4 or earlier and has been available since
     OpenBSD 2.4.

BSD                              March 30, 2020                              BSD