diff options
Diffstat (limited to 'sys/netgraph/ng_hole.c')
-rw-r--r-- | sys/netgraph/ng_hole.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/sys/netgraph/ng_hole.c b/sys/netgraph/ng_hole.c new file mode 100644 index 0000000..7baf91d --- /dev/null +++ b/sys/netgraph/ng_hole.c @@ -0,0 +1,97 @@ + +/* + * 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@whistle.com> + * + * $FreeBSD$ + * $Whistle: ng_hole.c,v 1.8 1999/01/28 23:54:53 julian Exp $ + */ + +/* + * This node is a 'black hole' that simply discards everything it receives + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/errno.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/syslog.h> +#include <netgraph/ng_message.h> +#include <netgraph/netgraph.h> +#include <netgraph/ng_hole.h> + +/* Netgraph methods */ +static int ngh_rcvdata(hook_p hook, struct mbuf *m, meta_p meta); +static int ngh_disconnect(hook_p hook); + +static struct ng_type typestruct = { + NG_VERSION, + NG_HOLE_NODE_TYPE, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + ngh_rcvdata, + ngh_rcvdata, + ngh_disconnect +}; +NETGRAPH_INIT(hole, &typestruct); + +/* + * Receive data + */ +static int +ngh_rcvdata(hook_p hook, struct mbuf *m, meta_p meta) +{ + 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); +} |