1 .\" $NetBSD: libcrypto.pl,v 1.3 2007/11/27 22:16:03 christos Exp $
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136 .IX Title "SSL_set_shutdown 3"
137 .TH SSL_set_shutdown 3 "2005-03-30" "1.1.0-dev" "OpenSSL"
138 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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143 SSL_set_shutdown, SSL_get_shutdown \- manipulate shutdown state of an SSL connection
147 .IX Header "SYNOPSIS"
149 \& #include <openssl/ssl.h>
151 \& void SSL_set_shutdown(SSL *ssl, int mode);
153 \& int SSL_get_shutdown(const SSL *ssl);
156 .IX Header "DESCRIPTION"
157 \&\fISSL_set_shutdown()\fR sets the shutdown state of \fBssl\fR to \fBmode\fR.
159 \&\fISSL_get_shutdown()\fR returns the shutdown mode of \fBssl\fR.
162 The shutdown state of an ssl connection is a bitmask of:
164 No shutdown setting, yet.
165 .IP "\s-1SSL_SENT_SHUTDOWN\s0" 4
166 .IX Item "SSL_SENT_SHUTDOWN"
167 A \*(L"close notify\*(R" shutdown alert was sent to the peer, the connection is being
168 considered closed and the session is closed and correct.
169 .IP "\s-1SSL_RECEIVED_SHUTDOWN\s0" 4
170 .IX Item "SSL_RECEIVED_SHUTDOWN"
171 A shutdown alert was received form the peer, either a normal \*(L"close notify\*(R"
174 \&\s-1SSL_SENT_SHUTDOWN\s0 and \s-1SSL_RECEIVED_SHUTDOWN\s0 can be set at the same time.
176 The shutdown state of the connection is used to determine the state of
177 the ssl session. If the session is still open, when
178 \&\fISSL_clear\fR\|(3) or \fISSL_free\fR\|(3) is called,
179 it is considered bad and removed according to \s-1RFC2246\s0.
180 The actual condition for a correctly closed session is \s-1SSL_SENT_SHUTDOWN\s0
181 (according to the \s-1TLS\s0 \s-1RFC\s0, it is acceptable to only send the \*(L"close notify\*(R"
182 alert but to not wait for the peer's answer, when the underlying connection
184 \&\fISSL_set_shutdown()\fR can be used to set this state without sending a
185 close alert to the peer (see \fISSL_shutdown\fR\|(3)).
187 If a \*(L"close notify\*(R" was received, \s-1SSL_RECEIVED_SHUTDOWN\s0 will be set,
188 for setting \s-1SSL_SENT_SHUTDOWN\s0 the application must however still call
189 \&\fISSL_shutdown\fR\|(3) or \fISSL_set_shutdown()\fR itself.
191 .IX Header "RETURN VALUES"
192 \&\fISSL_set_shutdown()\fR does not return diagnostic information.
194 \&\fISSL_get_shutdown()\fR returns the current setting.
196 .IX Header "SEE ALSO"
197 \&\fIssl\fR\|(3), \fISSL_shutdown\fR\|(3),
198 \&\fISSL_CTX_set_quiet_shutdown\fR\|(3),
199 \&\fISSL_clear\fR\|(3), \fISSL_free\fR\|(3)