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 Apache License 2.0 (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>.