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+.\" ========================================================================
+.\"
+.IX Title "SSL_set_fd 3"
+.TH SSL_set_fd 3 "2009-06-14" "0.9.8k" "OpenSSL"
+.SH "NAME"
+SSL_set_fd \- connect the SSL object with a file descriptor
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/ssl.h>
+.Ve
+.PP
+.Vb 3
+\& int SSL_set_fd(SSL *ssl, int fd);
+\& int SSL_set_rfd(SSL *ssl, int fd);
+\& int SSL_set_wfd(SSL *ssl, int fd);
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+\&\fISSL_set_fd()\fR sets the file descriptor \fBfd\fR as the input/output facility
+for the \s-1TLS/SSL\s0 (encrypted) side of \fBssl\fR. \fBfd\fR will typically be the
+socket file descriptor of a network connection.
+.PP
+When performing the operation, a \fBsocket \s-1BIO\s0\fR is automatically created to
+interface between the \fBssl\fR and \fBfd\fR. The \s-1BIO\s0 and hence the \s-1SSL\s0 engine
+inherit the behaviour of \fBfd\fR. If \fBfd\fR is non\-blocking, the \fBssl\fR will
+also have non-blocking behaviour.
+.PP
+If there was already a \s-1BIO\s0 connected to \fBssl\fR, \fIBIO_free()\fR will be called
+(for both the reading and writing side, if different).
+.PP
+\&\fISSL_set_rfd()\fR and \fISSL_set_wfd()\fR perform the respective action, but only
+for the read channel or the write channel, which can be set independently.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+The following return values can occur:
+.IP "0" 4
+The operation failed. Check the error stack to find out why.
+.IP "1" 4
+.IX Item "1"
+The operation succeeded.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fISSL_get_fd\fR\|(3), \fISSL_set_bio\fR\|(3),
+\&\fISSL_connect\fR\|(3), \fISSL_accept\fR\|(3),
+\&\fISSL_shutdown\fR\|(3), \fIssl\fR\|(3) , \fIbio\fR\|(3)
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