859a4d166c
This clears out my outstanding netgraph changes. There is a netgraph change of design in the offing and this is to some extent a superset of soem of the new functionality and some of the old functionality that may be removed. This code works as before, but allows some new features that I want to work with and evaluate. It is the basis for a version of netgraph with integral locking for SMP use. This is running on my test machine with no new problems :-)
96 lines
3.0 KiB
C
96 lines
3.0 KiB
C
|
|
/*
|
|
* ng_hole.c
|
|
*
|
|
* Copyright (c) 1996-1999 Whistle Communications, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Subject to the following obligations and disclaimer of warranty, use and
|
|
* redistribution of this software, in source or object code forms, with or
|
|
* without modifications are expressly permitted by Whistle Communications;
|
|
* provided, however, that:
|
|
* 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
|
|
* such appears in the above copyright notice or in the software.
|
|
*
|
|
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
|
|
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
|
|
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
|
|
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
|
|
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
|
|
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
|
|
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
|
|
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
|
|
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
|
|
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
|
|
* OF SUCH DAMAGE.
|
|
*
|
|
* Author: Julian Elisher <julian@freebsd.org>
|
|
*
|
|
* $FreeBSD$
|
|
* $Whistle: ng_hole.c,v 1.10 1999/11/01 09:24:51 julian Exp $
|
|
*/
|
|
|
|
/*
|
|
* This node is a 'black hole' that simply discards everything it receives
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <netgraph/ng_message.h>
|
|
#include <netgraph/netgraph.h>
|
|
#include <netgraph/ng_hole.h>
|
|
|
|
/* Netgraph methods */
|
|
static ng_rcvdata_t ngh_rcvdata;
|
|
static ng_disconnect_t ngh_disconnect;
|
|
|
|
static struct ng_type typestruct = {
|
|
NG_VERSION,
|
|
NG_HOLE_NODE_TYPE,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
ngh_rcvdata,
|
|
ngh_disconnect,
|
|
NULL
|
|
};
|
|
NETGRAPH_INIT(hole, &typestruct);
|
|
|
|
/*
|
|
* Receive data
|
|
*/
|
|
static int
|
|
ngh_rcvdata(hook_p hook, struct mbuf *m, meta_p meta,
|
|
struct mbuf **ret_m, meta_p *ret_meta, struct ng_mesg **resp)
|
|
{
|
|
NG_FREE_DATA(m, meta);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Hook disconnection
|
|
*/
|
|
static int
|
|
ngh_disconnect(hook_p hook)
|
|
{
|
|
if (hook->node->numhooks == 0)
|
|
ng_rmnode(hook->node);
|
|
return (0);
|
|
}
|