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 OpenSSL license (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