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.\"
.IX Title "SSL_CTX_SET_QUIET_SHUTDOWN 3SSL"
.TH SSL_CTX_SET_QUIET_SHUTDOWN 3SSL 2024-04-04 3.2.2-dev OpenSSL
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH NAME
SSL_CTX_set_quiet_shutdown, SSL_CTX_get_quiet_shutdown, SSL_set_quiet_shutdown,
SSL_get_quiet_shutdown \- manipulate shutdown behaviour
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
\&\fBSSL_CTX_set_quiet_shutdown()\fR sets the "quiet shutdown" flag for \fBctx\fR to be
\&\fBmode\fR. SSL objects created from \fBctx\fR inherit the \fBmode\fR valid at the time
\&\fBSSL_new\fR\|(3) is called. \fBmode\fR may be 0 or 1.
.PP
\&\fBSSL_CTX_get_quiet_shutdown()\fR returns the "quiet shutdown" setting of \fBctx\fR.
.PP
\&\fBSSL_set_quiet_shutdown()\fR sets the "quiet shutdown" flag for \fBssl\fR to be
\&\fBmode\fR. The setting stays valid until \fBssl\fR is removed with
\&\fBSSL_free\fR\|(3) or \fBSSL_set_quiet_shutdown()\fR is called again.
It is not changed when \fBSSL_clear\fR\|(3) is called.
\&\fBmode\fR may be 0 or 1.
.PP
\&\fBSSL_get_quiet_shutdown()\fR returns the "quiet shutdown" setting of \fBssl\fR.
.PP
These functions are not supported for QUIC SSL objects. \fBSSL_set_quiet_shutdown()\fR
has no effect if called on a QUIC SSL object.
.SH NOTES
.IX Header "NOTES"
Normally when a SSL connection is finished, the parties must send out
close_notify alert messages using \fBSSL_shutdown\fR\|(3)
for a clean shutdown.
.PP
When setting the "quiet shutdown" flag to 1, \fBSSL_shutdown\fR\|(3)
will set the internal flags to SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.
(\fBSSL_shutdown\fR\|(3) then behaves like
\&\fBSSL_set_shutdown\fR\|(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.
.PP
The default is normal shutdown behaviour as described by the TLS standard.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBSSL_CTX_set_quiet_shutdown()\fR and \fBSSL_set_quiet_shutdown()\fR do not return
diagnostic information.
.PP
\&\fBSSL_CTX_get_quiet_shutdown()\fR and \fBSSL_get_quiet_shutdown()\fR return the current
setting.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(7), \fBSSL_shutdown\fR\|(3),
\&\fBSSL_set_shutdown\fR\|(3), \fBSSL_new\fR\|(3),
\&\fBSSL_clear\fR\|(3), \fBSSL_free\fR\|(3)
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright 2001\-2023 The OpenSSL Project Authors. All Rights Reserved.
.PP
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>.