1=pod
2
3=head1 NAME
4
5SSL_set_fd, SSL_set_rfd, SSL_set_wfd - connect the SSL object with a file descriptor
6
7=head1 SYNOPSIS
8
9 #include <openssl/ssl.h>
10
11 int SSL_set_fd(SSL *ssl, int fd);
12 int SSL_set_rfd(SSL *ssl, int fd);
13 int SSL_set_wfd(SSL *ssl, int fd);
14
15=head1 DESCRIPTION
16
17SSL_set_fd() sets the file descriptor B<fd> as the input/output facility
18for the TLS/SSL (encrypted) side of B<ssl>. B<fd> will typically be the
19socket file descriptor of a network connection.
20
21When performing the operation, a B<socket BIO> is automatically created to
22interface between the B<ssl> and B<fd>. The BIO and hence the SSL engine
23inherit the behaviour of B<fd>. If B<fd> is nonblocking, the B<ssl> will
24also have nonblocking behaviour.
25
26If there was already a BIO connected to B<ssl>, BIO_free() will be called
27(for both the reading and writing side, if different).
28
29SSL_set_rfd() and SSL_set_wfd() perform the respective action, but only
30for the read channel or the write channel, which can be set independently.
31
32=head1 RETURN VALUES
33
34The following return values can occur:
35
36=over 4
37
38=item Z<>0
39
40The operation failed. Check the error stack to find out why.
41
42=item Z<>1
43
44The operation succeeded.
45
46=back
47
48=head1 SEE ALSO
49
50L<SSL_get_fd(3)>, L<SSL_set_bio(3)>,
51L<SSL_connect(3)>, L<SSL_accept(3)>,
52L<SSL_shutdown(3)>, L<ssl(7)> , L<bio(7)>
53
54=head1 COPYRIGHT
55
56Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
57
58Licensed under the Apache License 2.0 (the "License").  You may not use
59this file except in compliance with the License.  You can obtain a copy
60in the file LICENSE in the source distribution or at
61L<https://www.openssl.org/source/license.html>.
62
63=cut
64