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+.\"	$NetBSD: canloop.4,v 1.3 2017/05/29 08:42:33 wiz Exp $
+.\"
+.\" Copyright (c) 2017 Manuel Bouyer.
+.\" 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 ``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 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.
+.\"
+.Dd May 18, 2017
+.Dt CANLOOP 4
+.Os
+.Sh NAME
+.Nm canloop
+.Nd software loopback CAN network interface
+.Sh SYNOPSIS
+.Cd "pseudo-device canloop"
+.Sh DESCRIPTION
+The
+.Nm canloop
+pseudo interface is a loopback interface for the CAN layer.
+It can be used as destination by a CAN application, when no CAN
+hardware is available.
+Other sockets bound to the same
+.Nm canloop
+interface (or not bound to any interface) will receive the frames.
+.Pp
+.Nm canloop
+interfaces can be created by using the
+.Xr ifconfig 8
+.Cm create
+command.
+.Sh SEE ALSO
+.Xr can 4 ,
+.Xr intro 4 ,
+.Xr ifconfig 8
+.Sh HISTORY
+The
+.Nm
+device appeared in
+.Nx 8.0 .