1SSL_SET_SHUTDOWN(3)                 OpenSSL                SSL_SET_SHUTDOWN(3)
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NAME

6       SSL_set_shutdown, SSL_get_shutdown - manipulate shutdown state of an
7       SSL connection
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SYNOPSIS

10        #include <openssl/ssl.h>
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12        void SSL_set_shutdown(SSL *ssl, int mode);
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14        int SSL_get_shutdown(const SSL *ssl);
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DESCRIPTION

17       SSL_set_shutdown() sets the shutdown state of ssl to mode.
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19       SSL_get_shutdown() returns the shutdown mode of ssl.
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NOTES

22       The shutdown state of an ssl connection is a bit mask of:
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24       0   No shutdown setting, yet.
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26       SSL_SENT_SHUTDOWN
27           A close_notify shutdown alert was sent to the peer, the connection
28           is being considered closed and the session is closed and correct.
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30       SSL_RECEIVED_SHUTDOWN
31           A shutdown alert was received form the peer, either a normal
32           close_notify or a fatal error.
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34       SSL_SENT_SHUTDOWN and SSL_RECEIVED_SHUTDOWN can be set at the same
35       time.
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37       The shutdown state of the connection is used to determine the state of
38       the ssl session. If the session is still open, when SSL_clear(3) or
39       SSL_free(3) is called, it is considered bad and removed according to
40       RFC2246.  The actual condition for a correctly closed session is
41       SSL_SENT_SHUTDOWN (according to the TLS RFC, it is acceptable to only
42       send the close_notify alert but to not wait for the peer's answer, when
43       the underlying connection is closed).  SSL_set_shutdown() can be used
44       to set this state without sending a close alert to the peer (see
45       SSL_shutdown(3)).
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47       If a close_notify was received, SSL_RECEIVED_SHUTDOWN will be set, for
48       setting SSL_SENT_SHUTDOWN the application must however still call
49       SSL_shutdown(3) or SSL_set_shutdown() itself.
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RETURN VALUES

52       SSL_set_shutdown() does not return diagnostic information.
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54       SSL_get_shutdown() returns the current setting.
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SEE ALSO

57       ssl(7), SSL_shutdown(3), SSL_CTX_set_quiet_shutdown(3), SSL_clear(3),
58       SSL_free(3)
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61       Copyright 2001-2020 The OpenSSL Project Authors. All Rights Reserved.
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63       Licensed under the OpenSSL license (the "License").  You may not use
64       this file except in compliance with the License.  You can obtain a copy
65       in the file LICENSE in the source distribution or at
66       <https://www.openssl.org/source/license.html>.
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701.1.1k                            2021-03-26               SSL_SET_SHUTDOWN(3)
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