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+.\" Copyright (c) 1999
+.\"	Nick Hibma <hibma@skylink.it>. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by Bill Paul.
+.\" 4. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"   without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY NICK HIBMA AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL NICK HIBMA OR THE VOICES IN HIS HEAD
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+.\" THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.\"	$FreeBSD$
+.\"
+.Dd April 30, 2000
+.Dt UDBP 4
+.Os FreeBSD
+.Sh NAME
+.Nm udbp
+.Nd USB Double Bulk Pipe driver
+.Sh SYNOPSIS
+.Cd "device udbp"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for host-to-host cables that contain at least two
+bulk pipes, one for each direction, like for example the EzLink cable and
+the NetChip 1080 chip.
+.Pp
+It requires netgraph to be avalable. This can be done either by adding
+.Cd "options NETGRAPH"
+to your kernel configuration file, or alternatively loading
+.Nm netgraph
+as a module either from
+.Pa /boot/loader.conf
+or from the command line, before the udbp module.
+.Sh EXAMPLE
+.Dl options NETGRAPH
+.Dl device udbp
+.Pp
+Add the
+.Nm udbp
+driver to the kernel.
+.Pp
+.Dl kldload netgraph
+.Dl kldload udbp
+.Pp
+Load the
+.Nm netgraph
+module and then the
+.Nm udbp
+driver.
+.Pp
+.Dl ngctl mkpeer udbp0: iface data inet
+.Dl ifconfig ng0 10.0.0.1 10.0.0.2
+.Pp
+Create a new network interface node node and connect it's inet hook to the data
+hook of the
+.Nm udbp
+node. Ifconfig configures the resulting network interface ng0 with a local
+IP address of 10.0.0.1 and a remote 10.0.0.2. On the remote host the two
+IP addresses should of course be reversed.
+.Pp
+.Sh SEE ALSO
+.Xr netgraph 4 ,
+.Xr ohci 4 ,
+.Xr uhci 4 ,
+.Xr usb 4 ,
+.Xr ngctl 8 ,
+.Xr ng_iface 8 ,
+.Sh HISTORY
+The
+.Nm udbp
+driver first appeared in
+.Fx 5.0 .
+.Sh AUTHORS
+The
+.Nm udbp
+driver was written by
+.An Doug Ambrisko Aq ambrisko@whistle.com ,
+.An Julian Elischer Aq julian@whistle.com
+and
+.An Nick Hibma Aq n_hibma@freebsd.org .
+.Pp
+This manual page was written by
+.An Nick Hibma Aq hibma@skylink.it .