SSL_set_shutdown, SSL_get_shutdown - Manipulate shutdown state of an
int mode ); int SSL_get_shutdown(
SSL *ssl );
The SSL_set_shutdown() function sets the shutdown state of ssl to mode.
The SSL_get_shutdown() function returns the shutdown mode of ssl.
The shutdown state of an ssl connection is a bitmask of: No shutdown
setting, yet. A close notify shutdown alert was sent to the peer, the
connection is being considered closed and the session is closed and
correct. A shutdown alert was received form the peer, either a normal
close notify or a fatal error.
SSL_SENT_SHUTDOWN and SSL_RECEIVED_SHUTDOWN can be set at the same
The shutdown state of the connection is used to determine the state of
the ssl session. If the session is still open when SSL_clear() or
SSL_free() is called, it is considered bad and removed according to
RFC2246. The actual condition for a correctly closed session is
SSL_SENT_SHUTDOWN. Acording to the TLS RFC, it is acceptable to only
send the "close notify" alert but not wait for the peer's answer, when
the underlying connection is closed.
If a close notify was received, SSL_RECEIVED_SHUTDOWN will be set. For
setting SSL_SENT_SHUTDOWN, the application still must call SSL_shut‐
down() or SSL_set_shutdown().
The SSL_set_shutdown() function does not return diagnostic information.
The SSL_get_shutdown() function returns the current setting.
Functions: ssl(3), SSL_shutdown(3), SSL_CTX_set_quiet_shutdown(3)SSL_clear(3), SSL_free(3)SSL_set_shutdown(3)