The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/modules/netgraph/echo/ng_echo.4

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    1 .\" Copyright (c) 1996-1999 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
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   32 .\" 
   33 .\" Author: Archie Cobbs <archie@freebsd.org>
   34 .\"
   35 .\" $FreeBSD$
   36 .\" $Whistle: ng_echo.8,v 1.4 1999/01/25 23:46:26 archie Exp $
   37 .\"
   38 .Dd January 19, 1999
   39 .Dt NG_ECHO 4
   40 .Os FreeBSD
   41 .Sh NAME
   42 .Nm ng_echo
   43 .Nd netgraph echo node type
   44 .Sh SYNOPSIS
   45 .Fd #include <netgraph/ng_echo.h>
   46 .Sh DESCRIPTION
   47 The
   48 .Nm echo
   49 node type reflects all data and control messages back to the sender.
   50 This node type is used for testing and debugging.
   51 .Sh HOOKS
   52 A
   53 .Nm echo
   54 node accepts any request to connect, regardless of the hook name,
   55 as long as the name is unique.
   56 .Sh CONTROL MESSAGES
   57 This node type supports only the generic control messages.
   58 Any other control messages are reflected back to the sender.
   59 .Sh SHUTDOWN
   60 This node shuts down upon receipt of a
   61 .Dv NGM_SHUTDOWN
   62 control message, or when all hooks have been disconnected.
   63 .Sh SEE ALSO
   64 .Xr netgraph 4 ,
   65 .Xr ng_hole 4 ,
   66 .Xr ngctl 8
   67 .Sh HISTORY
   68 The
   69 .Nm
   70 node type was implemented in
   71 .Fx 4.0 .
   72 .Sh AUTHORS
   73 .An Julian Elischer Aq julian@freebsd.org

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