64 lines
2.1 KiB
Plaintext
64 lines
2.1 KiB
Plaintext
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=pod
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=head1 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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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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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(const SSL_CTX *ctx);
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void SSL_set_quiet_shutdown(SSL *ssl, int mode);
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int SSL_get_quiet_shutdown(const SSL *ssl);
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=head1 DESCRIPTION
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SSL_CTX_set_quiet_shutdown() sets the "quiet shutdown" flag for B<ctx> to be
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B<mode>. SSL objects created from B<ctx> inherit the B<mode> valid at the time
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L<SSL_new(3)|SSL_new(3)> is called. B<mode> may be 0 or 1.
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SSL_CTX_get_quiet_shutdown() returns the "quiet shutdown" setting of B<ctx>.
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SSL_set_quiet_shutdown() sets the "quiet shutdown" flag for B<ssl> to be
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B<mode>. The setting stays valid until B<ssl> is removed with
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L<SSL_free(3)|SSL_free(3)> or SSL_set_quiet_shutdown() is called again.
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It is not changed when L<SSL_clear(3)|SSL_clear(3)> is called.
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B<mode> may be 0 or 1.
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SSL_get_quiet_shutdown() returns the "quiet shutdown" setting of B<ssl>.
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=head1 NOTES
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Normally when a SSL connection is finished, the parties must send out
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"close notify" alert messages using L<SSL_shutdown(3)|SSL_shutdown(3)>
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for a clean shutdown.
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When setting the "quiet shutdown" flag to 1, L<SSL_shutdown(3)|SSL_shutdown(3)>
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will set the internal flags to SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.
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(L<SSL_shutdown(3)|SSL_shutdown(3)> then behaves like
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L<SSL_set_shutdown(3)|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 "close notify" alert
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is sent to the peer. This behaviour violates the TLS standard.
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The default is normal shutdown behaviour as described by the TLS standard.
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=head1 RETURN VALUES
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SSL_CTX_set_quiet_shutdown() and SSL_set_quiet_shutdown() do not return
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diagnostic information.
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SSL_CTX_get_quiet_shutdown() and SSL_get_quiet_shutdown return the current
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setting.
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=head1 SEE ALSO
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L<ssl(3)|ssl(3)>, L<SSL_shutdown(3)|SSL_shutdown(3)>,
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L<SSL_set_shutdown(3)|SSL_set_shutdown(3)>, L<SSL_new(3)|SSL_new(3)>,
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L<SSL_clear(3)|SSL_clear(3)>, L<SSL_free(3)|SSL_free(3)>
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=cut
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