1.\" $NetBSD: canloop.4,v 1.3 2017/05/29 08:42:33 wiz Exp $ 2.\" 3.\" Copyright (c) 2017 Manuel Bouyer. 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 13.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 14.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 15.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 16.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 17.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 18.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 19.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22.\" 23.Dd May 18, 2017 24.Dt CANLOOP 4 25.Os 26.Sh NAME 27.Nm canloop 28.Nd software loopback CAN network interface 29.Sh SYNOPSIS 30.Cd "pseudo-device canloop" 31.Sh DESCRIPTION 32The 33.Nm canloop 34pseudo interface is a loopback interface for the CAN layer. 35It can be used as destination by a CAN application, when no CAN 36hardware is available. 37Other sockets bound to the same 38.Nm canloop 39interface (or not bound to any interface) will receive the frames. 40.Pp 41.Nm canloop 42interfaces can be created by using the 43.Xr ifconfig 8 44.Cm create 45command. 46.Sh SEE ALSO 47.Xr can 4 , 48.Xr intro 4 , 49.Xr ifconfig 8 50.Sh HISTORY 51The 52.Nm 53device appeared in 54.Nx 8.0 . 55