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1 .\" $NetBSD: SSL_set_fd.3,v 1.14 2015/06/12 17:01:14 christos Exp $
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137 .IX Title "SSL_set_fd 3"
138 .TH SSL_set_fd 3 "2014-06-05" "1.0.1n" "OpenSSL"
139 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
140 .\" way too many mistakes in technical documents.
141 .if n .ad l
142 .nh
143 .SH "NAME"
144 SSL_set_fd \- connect the SSL object with a file descriptor
145 .SH "LIBRARY"
146 libcrypto, -lcrypto
147 .SH "SYNOPSIS"
148 .IX Header "SYNOPSIS"
149 .Vb 1
150 \& #include <openssl/ssl.h>
151 \&
152 \& int SSL_set_fd(SSL *ssl, int fd);
153 \& int SSL_set_rfd(SSL *ssl, int fd);
154 \& int SSL_set_wfd(SSL *ssl, int fd);
155 .Ve
156 .SH "DESCRIPTION"
157 .IX Header "DESCRIPTION"
158 \&\fISSL_set_fd()\fR sets the file descriptor \fBfd\fR as the input/output facility
159 for the \s-1TLS/SSL \s0(encrypted) side of \fBssl\fR. \fBfd\fR will typically be the
160 socket file descriptor of a network connection.
161 .PP
162 When performing the operation, a \fBsocket \s-1BIO\s0\fR is automatically created to
163 interface between the \fBssl\fR and \fBfd\fR. The \s-1BIO\s0 and hence the \s-1SSL\s0 engine
164 inherit the behaviour of \fBfd\fR. If \fBfd\fR is non-blocking, the \fBssl\fR will
165 also have non-blocking behaviour.
166 .PP
167 If there was already a \s-1BIO\s0 connected to \fBssl\fR, \fIBIO_free()\fR will be called
168 (for both the reading and writing side, if different).
169 .PP
170 \&\fISSL_set_rfd()\fR and \fISSL_set_wfd()\fR perform the respective action, but only
171 for the read channel or the write channel, which can be set independently.
172 .SH "RETURN VALUES"
173 .IX Header "RETURN VALUES"
174 The following return values can occur:
175 .IP "0" 4
176 The operation failed. Check the error stack to find out why.
177 .IP "1" 4
178 .IX Item "1"
179 The operation succeeded.
180 .SH "SEE ALSO"
181 .IX Header "SEE ALSO"
182 \&\fISSL_get_fd\fR\|(3), \fISSL_set_bio\fR\|(3),
183 \&\fISSL_connect\fR\|(3), \fISSL_accept\fR\|(3),
184 \&\fISSL_shutdown\fR\|(3), \fIssl\fR\|(3) , \fIopenssl_bio\fR\|(3)