NAME

       SSL_CTX_set_quiet_shutdown, SSL_CTX_get_quiet_shutdown, SSL_set_quiet_shutdown,
       SSL_get_quiet_shutdown - manipulate shutdown behaviour

SYNOPSIS

        #include <openssl/ssl.h>

        void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode);
        int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx);

        void SSL_set_quiet_shutdown(SSL *ssl, int mode);
        int SSL_get_quiet_shutdown(const SSL *ssl);

DESCRIPTION

       SSL_CTX_set_quiet_shutdown() sets the "quiet shutdown" flag for ctx to be mode. SSL
       objects created from ctx inherit the mode valid at the time SSL_new(3) is called. mode may
       be 0 or 1.

       SSL_CTX_get_quiet_shutdown() returns the "quiet shutdown" setting of ctx.

       SSL_set_quiet_shutdown() sets the "quiet shutdown" flag for ssl to be mode. The setting
       stays valid until ssl is removed with SSL_free(3) or SSL_set_quiet_shutdown() is called
       again.  It is not changed when SSL_clear(3) is called.  mode may be 0 or 1.

       SSL_get_quiet_shutdown() returns the "quiet shutdown" setting of ssl.

NOTES

       Normally when a SSL connection is finished, the parties must send out close_notify alert
       messages using SSL_shutdown(3) for a clean shutdown.

       When setting the "quiet shutdown" flag to 1, SSL_shutdown(3) will set the internal flags
       to SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.  (SSL_shutdown(3) then behaves like
       SSL_set_shutdown(3) called with SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.)  The session is
       thus considered to be shutdown, but no close_notify alert is sent to the peer. This
       behaviour violates the TLS standard.

       The default is normal shutdown behaviour as described by the TLS standard.

RETURN VALUES

       SSL_CTX_set_quiet_shutdown() and SSL_set_quiet_shutdown() do not return diagnostic
       information.

       SSL_CTX_get_quiet_shutdown() and SSL_get_quiet_shutdown return the current setting.

SEE ALSO

       ssl(7), SSL_shutdown(3), SSL_set_shutdown(3), SSL_new(3), SSL_clear(3), SSL_free(3)

COPYRIGHT

       Copyright 2001-2018 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 <https://www.openssl.org/source/license.html>.