1.\" Copyright (c) 2000 Whistle Communications, Inc. 2.\" All rights reserved. 3.\" 4.\" Subject to the following obligations and disclaimer of warranty, use and 5.\" redistribution of this software, in source or object code forms, with or 6.\" without modifications are expressly permitted by Whistle Communications; 7.\" provided, however, that: 8.\" 1. Any and all reproductions of the source or object code must include the 9.\" copyright notice above and the following disclaimer of warranties; and 10.\" 2. No rights are granted, in any manner or form, to use Whistle 11.\" Communications, Inc. trademarks, including the mark "WHISTLE 12.\" COMMUNICATIONS" on advertising, endorsements, or otherwise except as 13.\" such appears in the above copyright notice or in the software. 14.\" 15.\" THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 16.\" TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 17.\" REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 18.\" INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 19.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 20.\" WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 21.\" REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 22.\" SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 23.\" IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 24.\" RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 25.\" WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 26.\" PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 27.\" SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 31.\" OF SUCH DAMAGE. 32.\" 33.\" Author: Archie Cobbs <archie@whistle.com> 34.\" 35.\" $FreeBSD$ 36.\" 37.Dd January 25, 2000 38.Dt NG_ETHER 4 39.Os FreeBSD 40.Sh NAME 41.Nm ng_ether 42.Nd Ethernet netgraph node type 43.Sh SYNOPSIS 44.Fd #include <netgraph/ng_ether.h> 45.Sh DESCRIPTION 46The 47.Nm ether 48netgraph node type allows Ethernet interfaces to interact with 49the 50.Xr netgraph 4 51networking subsystem. The kernel must be compiled with 52.Bd -literal 53 options NETGRAPH 54.Ed 55.Pp 56for this functionality to be enabled. 57This causes a netgraph node to be automatically created for each Ethernet 58interface in the system. The node will have a name equal to 59the name of the interface, and it will be persistent. 60.Pp 61The Ethernet interface continues to function normally until a connection 62is made to one of the two supported hooks, 63.Dv orphans 64or 65.Dv divert . 66The 67.Dv orphans 68hook is used to receive Ethernet frames received by the device and 69having an unknown or unsupported Ethertype. 70The 71.Dv divert 72hook is used to divert 73.Em all 74Ethernet frames received by the device; the interface will otherwise 75appear to go silent until this hook is disconnected. 76.Pp 77Either hook may be used to transmit Ethernet frames by transmitting packets 78to the hook. In all cases, frames are raw Ethernet frames with the standard 7914 byte Ethernet header (but no checksum). 80.Sh HOOKS 81This node type supports the following hooks: 82.Pp 83.Bl -tag -width orphans 84.It Dv orphans 85This hook transmits Ethernet frames received by the device and 86having an unknown or unsupported Ethertype. Frames received on 87this hook are written as-is out on the wire. 88.It Dv divert 89When connected, this hook transmits all Ethernet frames received by the device. 90Frames received on this hook are written as-is out on the wire. 91.El 92.Sh CONTROL MESSAGES 93This node type supports only the generic control messages. 94.Sh SHUTDOWN 95This node is persistent. Upon receipt of a 96.Dv NGM_SHUTDOWN 97control message, all hooks are disconnected. 98.Sh EXAMPLE 99This command will dump all packets received by the 100.Dv fxp0 101interface to standard output as decoded hex and ASCII: 102.Bd -literal -offset indent 103nghook -a fxp0: divert 104.Ed 105.Sh SEE ALSO 106.Xr arp 4 , 107.Xr netgraph 4 , 108.Xr netintro 4 , 109.Xr ifconfig 8 , 110.Xr nghook 8 , 111.Xr ngctl 8 112.Sh AUTHOR 113.An Julian Elischer Aq julian@FreeBSD.org 114