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135 .IX Title "SSL_set_fd 3"
136 .TH SSL_set_fd 3 "2016-03-01" "1.0.2g" "OpenSSL"
137 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
138 .\" way too many mistakes in technical documents.
142 SSL_set_fd \- connect the SSL object with a file descriptor
144 .IX Header "SYNOPSIS"
146 \& #include <openssl/ssl.h>
148 \& int SSL_set_fd(SSL *ssl, int fd);
149 \& int SSL_set_rfd(SSL *ssl, int fd);
150 \& int SSL_set_wfd(SSL *ssl, int fd);
153 .IX Header "DESCRIPTION"
154 \&\fISSL_set_fd()\fR sets the file descriptor \fBfd\fR as the input/output facility
155 for the \s-1TLS/SSL \s0(encrypted) side of \fBssl\fR. \fBfd\fR will typically be the
156 socket file descriptor of a network connection.
158 When performing the operation, a \fBsocket \s-1BIO\s0\fR is automatically created to
159 interface between the \fBssl\fR and \fBfd\fR. The \s-1BIO\s0 and hence the \s-1SSL\s0 engine
160 inherit the behaviour of \fBfd\fR. If \fBfd\fR is non-blocking, the \fBssl\fR will
161 also have non-blocking behaviour.
163 If there was already a \s-1BIO\s0 connected to \fBssl\fR, \fIBIO_free()\fR will be called
164 (for both the reading and writing side, if different).
166 \&\fISSL_set_rfd()\fR and \fISSL_set_wfd()\fR perform the respective action, but only
167 for the read channel or the write channel, which can be set independently.
169 .IX Header "RETURN VALUES"
170 The following return values can occur:
172 The operation failed. Check the error stack to find out why.
175 The operation succeeded.
177 .IX Header "SEE ALSO"
178 \&\fISSL_get_fd\fR\|(3), \fISSL_set_bio\fR\|(3),
179 \&\fISSL_connect\fR\|(3), \fISSL_accept\fR\|(3),
180 \&\fISSL_shutdown\fR\|(3), \fIssl\fR\|(3) , \fIbio\fR\|(3)