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+.Dd $Mdocdate: October 12 2014 $
+.Dt SSL_GET_FD 3
+.Os
+.Sh NAME
+.Nm SSL_get_fd ,
+.Nm SSL_get_rfd ,
+.Nm SSL_get_wfd
+.Nd get file descriptor linked to an SSL object
+.Sh SYNOPSIS
+.In openssl/ssl.h
+.Ft int
+.Fn SSL_get_fd "const SSL *ssl"
+.Ft int
+.Fn SSL_get_rfd "const SSL *ssl"
+.Ft int
+.Fn SSL_get_wfd "const SSL *ssl"
+.Sh DESCRIPTION
+.Fn SSL_get_fd
+returns the file descriptor which is linked to
+.Fa ssl .
+.Fn SSL_get_rfd
+and
+.Fn SSL_get_wfd
+return the file descriptors for the read or the write channel,
+which can be different.
+If the read and the write channel are different,
+.Fn SSL_get_fd
+will return the file descriptor of the read channel.
+.Sh RETURN VALUES
+The following return values can occur:
+.Bl -tag -width Ds
+.It \(mi1
+The operation failed, because the underlying
+.Vt BIO
+is not of the correct type (suitable for file descriptors).
+.It \(>=0
+The file descriptor linked to
+.Fa ssl .
+.El
+.Sh SEE ALSO
+.Xr bio 3 ,
+.Xr ssl 3 ,
+.Xr SSL_set_fd 3