1=pod
2
3=head1 NAME
4
5SSL_shutdown - shut down a TLS/SSL connection
6
7=head1 SYNOPSIS
8
9 #include <openssl/ssl.h>
10
11 int SSL_shutdown(SSL *ssl);
12
13=head1 DESCRIPTION
14
15SSL_shutdown() shuts down an active TLS/SSL connection. It sends the shutdown
16alert to the peer. The behaviour of SSL_shutdown() depends on the underlying
17BIO.
18
19If the underlying BIO is B<blocking>, SSL_shutdown() will only return once the
20handshake has been finished or an error occurred.
21
22If the underlying BIO is B<non-blocking>, SSL_shutdown() will also return
23when the underlying BIO could not satisfy the needs of SSL_shutdown()
24to continue the handshake. In this case a call to SSL_get_error() with the
25return value of SSL_shutdown() will yield B<SSL_ERROR_WANT_READ> or
26B<SSL_ERROR_WANT_WRITE>. The calling process then must repeat the call after

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52action is need to continue the operation for non-blocking BIOs.
53Call SSL_get_error() with the return value B<ret> to find out the reason.
54
55=back
56
57=head1 SEE ALSO
58
59L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_connect(3)|SSL_connect(3)>,
60L<SSL_accept(3)|SSL_accept(3)>, L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>
61
62=cut