204 lines
6.1 KiB
Groff
204 lines
6.1 KiB
Groff
.\" $NetBSD: SSL_CTX_set_quiet_shutdown.3,v 1.6 2003/07/24 14:16:44 itojun Exp $
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.\" ======================================================================
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.\"
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.IX Title "SSL_CTX_set_quiet_shutdown 3"
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.TH SSL_CTX_set_quiet_shutdown 3 "0.9.7b" "2001-08-18" "OpenSSL"
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.UC
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.SH "NAME"
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SSL_CTX_set_quiet_shutdown, SSL_CTX_get_quiet_shutdown, SSL_set_quiet_shutdown, SSL_get_quiet_shutdown \- manipulate shutdown behaviour
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/ssl.h>
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.Ve
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.Vb 2
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\& void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode);
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\& int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx);
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.Ve
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.Vb 2
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\& void SSL_set_quiet_shutdown(SSL *ssl, int mode);
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\& int SSL_get_quiet_shutdown(SSL *ssl);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fISSL_CTX_set_quiet_shutdown()\fR sets the \*(L"quiet shutdown\*(R" flag for \fBctx\fR to be
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\&\fBmode\fR. \s-1SSL\s0 objects created from \fBctx\fR inherit the \fBmode\fR valid at the time
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SSL_new(3) is called. \fBmode\fR may be 0 or 1.
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.PP
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\&\fISSL_CTX_get_quiet_shutdown()\fR returns the \*(L"quiet shutdown\*(R" setting of \fBctx\fR.
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.PP
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\&\fISSL_set_quiet_shutdown()\fR sets the \*(L"quiet shutdown\*(R" flag for \fBssl\fR to be
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\&\fBmode\fR. The setting stays valid until \fBssl\fR is removed with
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SSL_free(3) or \fISSL_set_quiet_shutdown()\fR is called again.
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It is not changed when SSL_clear(3) is called.
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\&\fBmode\fR may be 0 or 1.
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.PP
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\&\fISSL_get_quiet_shutdown()\fR returns the \*(L"quiet shutdown\*(R" setting of \fBssl\fR.
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.SH "NOTES"
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.IX Header "NOTES"
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Normally when a \s-1SSL\s0 connection is finished, the parties must send out
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\&\*(L"close notify\*(R" alert messages using SSL_shutdown(3)
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for a clean shutdown.
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.PP
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When setting the \*(L"quiet shutdown\*(R" flag to 1, SSL_shutdown(3)
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will set the internal flags to SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.
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(SSL_shutdown(3) then behaves like
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SSL_set_shutdown(3) called with
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SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.)
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The session is thus considered to be shutdown, but no \*(L"close notify\*(R" alert
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is sent to the peer. This behaviour violates the \s-1TLS\s0 standard.
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.PP
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The default is normal shutdown behaviour as described by the \s-1TLS\s0 standard.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fISSL_CTX_set_quiet_shutdown()\fR and \fISSL_set_quiet_shutdown()\fR do not return
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diagnostic information.
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.PP
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\&\fISSL_CTX_get_quiet_shutdown()\fR and SSL_get_quiet_shutdown return the current
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setting.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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ssl(3), SSL_shutdown(3),
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SSL_set_shutdown(3), SSL_new(3),
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SSL_clear(3), SSL_free(3)
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