freebsd-dev/share/man/man4/ng_hole.4

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.\" Author: Archie Cobbs <archie@FreeBSD.org>
.\"
.\" $FreeBSD$
.\" $Whistle: ng_hole.8,v 1.4 1999/01/25 23:46:26 archie Exp $
.\"
.Dd January 19, 1999
.Dt NG_HOLE 4
.Os
.Sh NAME
.Nm ng_hole
.Nd netgraph discard node type
.Sh SYNOPSIS
.In netgraph/ng_hole.h
.Sh DESCRIPTION
The
.Nm hole
node type silently discards all data and control messages it receives.
This type is used for testing and debugging.
.Sh HOOKS
A
.Nm
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.
Other control messages are silently discarded.
.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_echo 4 ,
.Xr ngctl 8
.Sh HISTORY
The
.Nm
node type was implemented in
.Fx 4.0 .
.Sh AUTHORS
.An Julian Elischer Aq julian@FreeBSD.org