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/hole/ng_hole.4

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    1 .\" Copyright (c) 1996-1999 Whistle Communications, Inc.
    2 .\" All rights reserved.
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    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
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    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
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   15 .\" THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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   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
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   33 .\" Author: Archie Cobbs <archie@freebsd.org>
   34 .\"
   35 .\" $FreeBSD: stable/3/sys/modules/netgraph/hole/ng_hole.4 67528 2000-10-24 22:35:27Z julian $
   36 .\" $Whistle: ng_hole.8,v 1.4 1999/01/25 23:46:26 archie Exp $
   37 .\"
   38 .Dd January 19, 1999
   39 .Dt NG_HOLE 4
   40 .Os FreeBSD
   41 .Sh NAME
   42 .Nm ng_hole
   43 .Nd netgraph discard node type
   44 .Sh SYNOPSIS
   45 .Fd #include <netgraph/ng_hole.h>
   46 .Sh DESCRIPTION
   47 The
   48 .Nm hole
   49 node type silently discards all data and control messages it receives.
   50 This type is used for testing and debugging.
   51 .Sh HOOKS
   52 A
   53 .Nm
   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 Other control messages are silently discarded.
   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_echo 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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