Add a trivial node to reflect ethernet frames to whence they came.

MFC after: 1 month

1 files changed, 77 insertions, 0 deletions

diff --git a/share/man/man4/ng_ether_echo.4 b/share/man/man4/ng_ether_echo.4
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+++ b/share/man/man4/ng_ether_echo.4
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+.\" Copyright (c) 1996-1999 Whistle Communications, Inc.
+.\" All rights reserved.
+.\"
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+.\" without modifications are expressly permitted by Whistle Communications;
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+.\" 1. Any and all reproductions of the source or object code must include the
+.\"    copyright notice above and the following disclaimer of warranties; and
+.\" 2. No rights are granted, in any manner or form, to use Whistle
+.\"    Communications, Inc. trademarks, including the mark "WHISTLE
+.\"    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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+.\" Author: Archie Cobbs <archie@FreeBSD.org>
+.\"
+.\" $FreeBSD$
+.\" $Whistle: ng_echo.8,v 1.4 1999/01/25 23:46:26 archie Exp $
+.\"
+.Dd December 24, 2008
+.Dt NG_ETHER_ECHO 4
+.Os
+.Sh NAME
+.Nm ng_ether_echo
+.Nd netgraph ether_echo node type
+.Sh SYNOPSIS
+.In netgraph/ng_ether_echo.h
+.Sh DESCRIPTION
+The
+.Nm ether_echo
+node type reflects all data and control messages back to the sender.
+It assumes (and does not check) that the packet is an ethernet frame,
+and swaps teh source and destination addresses before echoing it.
+This node type is used for testing and debugging.
+.Sh HOOKS
+A
+.Nm ether_echo
+node accepts any request to connect, regardless of the hook name,
+as long as the name is unique.
+.Sh CONTROL MESSAGES
+This node type supports only the generic control messages.
+Any other control messages are reflected back to the sender.
+.Sh SHUTDOWN
+This node shuts down upon receipt of a
+.Dv NGM_SHUTDOWN
+control message, or when all hooks have been disconnected.
+.Sh SEE ALSO
+.Xr netgraph 4 ,
+.Xr ng_hole 4 ,
+.Xr ng_echo 4 ,
+.Xr ng_ether 4 ,
+.Xr ngctl 8
+.Sh HISTORY
+The
+.Nm
+node type was implemented in
+.Fx 8.0 .
+.Sh AUTHORS
+.An Julian Elischer Aq julian@FreeBSD.org