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131 .IX Title "SSL_set_fd 3"
132 .TH SSL_set_fd 3 "2017-01-26" "1.0.2k" "OpenSSL"
133 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
134 .\" way too many mistakes in technical documents.
138 SSL_set_fd \- connect the SSL object with a file descriptor
140 .IX Header "SYNOPSIS"
142 \& #include <openssl/ssl.h>
144 \& int SSL_set_fd(SSL *ssl, int fd);
145 \& int SSL_set_rfd(SSL *ssl, int fd);
146 \& int SSL_set_wfd(SSL *ssl, int fd);
149 .IX Header "DESCRIPTION"
150 \&\fISSL_set_fd()\fR sets the file descriptor \fBfd\fR as the input/output facility
151 for the \s-1TLS/SSL \s0(encrypted) side of \fBssl\fR. \fBfd\fR will typically be the
152 socket file descriptor of a network connection.
154 When performing the operation, a \fBsocket \s-1BIO\s0\fR is automatically created to
155 interface between the \fBssl\fR and \fBfd\fR. The \s-1BIO\s0 and hence the \s-1SSL\s0 engine
156 inherit the behaviour of \fBfd\fR. If \fBfd\fR is non-blocking, the \fBssl\fR will
157 also have non-blocking behaviour.
159 If there was already a \s-1BIO\s0 connected to \fBssl\fR, \fIBIO_free()\fR will be called
160 (for both the reading and writing side, if different).
162 \&\fISSL_set_rfd()\fR and \fISSL_set_wfd()\fR perform the respective action, but only
163 for the read channel or the write channel, which can be set independently.
165 .IX Header "RETURN VALUES"
166 The following return values can occur:
168 The operation failed. Check the error stack to find out why.
171 The operation succeeded.
173 .IX Header "SEE ALSO"
174 \&\fISSL_get_fd\fR\|(3), \fISSL_set_bio\fR\|(3),
175 \&\fISSL_connect\fR\|(3), \fISSL_accept\fR\|(3),
176 \&\fISSL_shutdown\fR\|(3), \fIssl\fR\|(3) , \fIbio\fR\|(3)