SSL_SESSION_free() decrements the reference count of B<session> and removes
the B<SSL_SESSION> structure pointed to by B<session> and frees up the allocated
memory, if the reference count has reached 0.
+If B<session> is NULL nothing is done.
=head1 NOTES
SSL_SESSION objects are allocated, when a TLS/SSL handshake operation
is successfully completed. Depending on the settings, see
-L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>,
+L<SSL_CTX_set_session_cache_mode(3)>,
the SSL_SESSION objects are internally referenced by the SSL_CTX and
linked into its session cache. SSL objects may be using the SSL_SESSION object;
as a session may be reused, several SSL objects may be using one SSL_SESSION
when an SSL_SESSION object was completely freed as the reference count
incorrectly became 0, but it is still referenced in the internal
session cache and the cache list is processed during a
-L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)> operation.
+L<SSL_CTX_flush_sessions(3)> operation.
SSL_SESSION_free() must only be called for SSL_SESSION objects, for
which the reference count was explicitly incremented (e.g.
-by calling SSL_get1_session(), see L<SSL_get_session(3)|SSL_get_session(3)>)
+by calling SSL_get1_session(), see L<SSL_get_session(3)>)
or when the SSL_SESSION object was generated outside a TLS handshake
-operation, e.g. by using L<d2i_SSL_SESSION(3)|d2i_SSL_SESSION(3)>.
+operation, e.g. by using L<d2i_SSL_SESSION(3)>.
It must not be called on other SSL_SESSION objects, as this would cause
incorrect reference counts and therefore program failures.
=head1 SEE ALSO
-L<ssl(3)|ssl(3)>, L<SSL_get_session(3)|SSL_get_session(3)>,
-L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>,
-L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)>,
- L<d2i_SSL_SESSION(3)|d2i_SSL_SESSION(3)>
+L<ssl(3)>, L<SSL_get_session(3)>,
+L<SSL_CTX_set_session_cache_mode(3)>,
+L<SSL_CTX_flush_sessions(3)>,
+L<d2i_SSL_SESSION(3)>
+
+=head1 COPYRIGHT
+
+Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (the "License"). You may not use
+this file except in compliance with the License. You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
=cut