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+.\" Copyright (c) 1999
+.\"	Nick Hibma <n_hibma@FreeBSD.org>. 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR OR CONTRIBUTORS 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 November 22, 2006
+.Dt UDBP 4
+.Os
+.Sh NAME
+.Nm udbp
+.Nd USB Double Bulk Pipe driver
+.Sh SYNOPSIS
+To compile this driver into the kernel,
+place the following line in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device udbp"
+.Ed
+.Pp
+Alternatively, to load the driver as a
+module at boot time, place the following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+udbp_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for host-to-host cables
+that contain at least two bulk pipes (one for each direction),
+for example
+the EzLink cable and the NetChip 1080 chip.
+.Pp
+.\" XXX	The description of how to add netgraph to the kernel
+.\"	is out of place here.  It should be limited to the
+.\"	netgraph(4) manpage only.  However, that page does
+.\"	not yet give instructions for kldload(8) for the
+.\"	clueless.  Working on it -- sheldonh
+It requires
+.Xr netgraph 4
+to be available.
+This can be done either by adding
+.Cd "options NETGRAPH"
+to your kernel configuration file, or alternatively loading
+.Xr netgraph 4
+as a module, either from
+.Pa /boot/loader.conf
+or from the command line, before the
+.Nm
+module.
+.Sh EXAMPLES
+.Dl options NETGRAPH
+.Dl device udbp
+.Pp
+Add the
+.Nm
+driver to the kernel.
+.Pp
+.Dl kldload netgraph
+.Dl kldload udbp
+.Pp
+Load the
+.Xr netgraph 4
+module and then the
+.Nm
+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
+and connect its inet hook to the data hook of the
+.Nm
+node.
+.Xr ifconfig 8
+configures the resulting network interface ng0 with a local
+IP address of 10.0.0.1 and a remote IP address of 10.0.0.2.
+On the remote host, the two
+IP addresses should of course be reversed.
+.Sh SEE ALSO
+.Xr netgraph 4 ,
+.Xr ng_iface 4 ,
+.Xr ohci 4 ,
+.Xr uhci 4 ,
+.Xr usb 4 ,
+.Xr ngctl 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Fx 5.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Doug Ambrisko Aq ambrisko@whistle.com ,
+.An Julian Elischer Aq julian@FreeBSD.org
+and
+.An Nick Hibma Aq n_hibma@FreeBSD.org .
+.Pp
+This manual page was written by
+.An Nick Hibma Aq n_hibma@FreeBSD.org .