.\"	$NetBSD: SSL_CTX_set_quiet_shutdown.3,v 1.10 2005/11/25 21:09:34 christos Exp $
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.\" ========================================================================
.\"
.IX Title "SSL_CTX_set_quiet_shutdown 3"
.TH SSL_CTX_set_quiet_shutdown 3 "2005-04-23" "0.9.8a" "OpenSSL"
.SH "NAME"
SSL_CTX_set_quiet_shutdown, SSL_CTX_get_quiet_shutdown, SSL_set_quiet_shutdown, SSL_get_quiet_shutdown \- manipulate shutdown behaviour
.SH "LIBRARY"
libcrypto, -lcrypto
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
.Ve
.PP
.Vb 2
\& void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode);
\& int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx);
.Ve
.PP
.Vb 2
\& void SSL_set_quiet_shutdown(SSL *ssl, int mode);
\& int SSL_get_quiet_shutdown(const SSL *ssl);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fISSL_CTX_set_quiet_shutdown()\fR sets the \*(L"quiet shutdown\*(R" flag for \fBctx\fR to be
\&\fBmode\fR. \s-1SSL\s0 objects created from \fBctx\fR inherit the \fBmode\fR valid at the time
\&\fISSL_new\fR\|(3) is called. \fBmode\fR may be 0 or 1.
.PP
\&\fISSL_CTX_get_quiet_shutdown()\fR returns the \*(L"quiet shutdown\*(R" setting of \fBctx\fR.
.PP
\&\fISSL_set_quiet_shutdown()\fR sets the \*(L"quiet shutdown\*(R" flag for \fBssl\fR to be
\&\fBmode\fR. The setting stays valid until \fBssl\fR is removed with
\&\fISSL_free\fR\|(3) or \fISSL_set_quiet_shutdown()\fR is called again.
It is not changed when \fISSL_clear\fR\|(3) is called.
\&\fBmode\fR may be 0 or 1.
.PP
\&\fISSL_get_quiet_shutdown()\fR returns the \*(L"quiet shutdown\*(R" setting of \fBssl\fR.
.SH "NOTES"
.IX Header "NOTES"
Normally when a \s-1SSL\s0 connection is finished, the parties must send out
\&\*(L"close notify\*(R" alert messages using \fISSL_shutdown\fR\|(3)
for a clean shutdown.
.PP
When setting the \*(L"quiet shutdown\*(R" flag to 1, \fISSL_shutdown\fR\|(3)
will set the internal flags to SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.
(\fISSL_shutdown\fR\|(3) then behaves like
\&\fISSL_set_shutdown\fR\|(3) called with
SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.)
The session is thus considered to be shutdown, but no \*(L"close notify\*(R" alert
is sent to the peer. This behaviour violates the \s-1TLS\s0 standard.
.PP
The default is normal shutdown behaviour as described by the \s-1TLS\s0 standard.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fISSL_CTX_set_quiet_shutdown()\fR and \fISSL_set_quiet_shutdown()\fR do not return
diagnostic information.
.PP
\&\fISSL_CTX_get_quiet_shutdown()\fR and SSL_get_quiet_shutdown return the current
setting.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIssl\fR\|(3), \fISSL_shutdown\fR\|(3),
\&\fISSL_set_shutdown\fR\|(3), \fISSL_new\fR\|(3),
\&\fISSL_clear\fR\|(3), \fISSL_free\fR\|(3)