ng_bpf.h revision 54097 
1
2/*
3 * ng_bpf.h
4 *
5 * Copyright (c) 1996-1999 Whistle Communications, Inc.
6 * All rights reserved.
7 *
8 * Subject to the following obligations and disclaimer of warranty, use and
9 * redistribution of this software, in source or object code forms, with or
10 * without modifications are expressly permitted by Whistle Communications;
11 * provided, however, that:
12 * 1. Any and all reproductions of the source or object code must include the
13 *    copyright notice above and the following disclaimer of warranties; and
14 * 2. No rights are granted, in any manner or form, to use Whistle
15 *    Communications, Inc. trademarks, including the mark "WHISTLE
16 *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
17 *    such appears in the above copyright notice or in the software.
18 *
19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANBPF, OR MAKE ANY
25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
35 * OF SUCH DAMAGE.
36 *
37 * Author: Archie Cobbs <archie@whistle.com>
38 *
39 * $FreeBSD: head/sys/netgraph/ng_bpf.h 54097 1999-12-03 21:21:49Z archie $
40 * $Whistle: ng_bpf.h,v 1.3 1999/12/03 20:30:23 archie Exp $
41 */
42
43#ifndef _NETGRAPH_BPF_H_
44#define _NETGRAPH_BPF_H_
45
46/* Node type name and magic cookie */
47#define NG_BPF_NODE_TYPE	"bpf"
48#define NGM_BPF_COOKIE		944100792
49
50/* Program structure for one hook */
51struct ng_bpf_hookprog {
52	char		thisHook[NG_HOOKLEN+1];		/* name of hook */
53	char		ifMatch[NG_HOOKLEN+1];		/* match dest hook */
54	char		ifNotMatch[NG_HOOKLEN+1];	/* !match dest hook */
55	int32_t		bpf_prog_len;			/* #isns in program */
56	struct bpf_insn	bpf_prog[0];			/* bpf program */
57};
58
59#define NG_BPF_HOOKPROG_SIZE(hp)	\
60	(sizeof(*(hp)) + (hp)->bpf_prog_len * sizeof((hp)->bpf_prog[0]))
61
62/* Keep this in sync with the above structure definition */
63#define NG_BPF_HOOKPROG_TYPE_INFO(bptype)	{		\
64	{							\
65	  { "thisHook",		&ng_parse_hookbuf_type	},	\
66	  { "ifMatch",		&ng_parse_hookbuf_type	},	\
67	  { "ifNotMatch",	&ng_parse_hookbuf_type	},	\
68	  { "bpf_prog_len",	&ng_parse_int32_type	},	\
69	  { "bpf_prog",		(bptype)		},	\
70	  { NULL },						\
71	}							\
72}
73
74/* Statistics structure for one hook */
75struct ng_bpf_hookstat {
76	u_int64_t	recvFrames;
77	u_int64_t	recvOctets;
78	u_int64_t	recvMatchFrames;
79	u_int64_t	recvMatchOctets;
80	u_int64_t	xmitFrames;
81	u_int64_t	xmitOctets;
82};
83
84/* Keep this in sync with the above structure definition */
85#define NG_BPF_HOOKSTAT_TYPE_INFO	{			\
86	{							\
87	  { "recvFrames",	&ng_parse_int64_type	},	\
88	  { "recvOctets",	&ng_parse_int64_type	},	\
89	  { "recvMatchFrames",	&ng_parse_int64_type	},	\
90	  { "recvMatchOctets",	&ng_parse_int64_type	},	\
91	  { "xmitFrames",	&ng_parse_int64_type	},	\
92	  { "xmitOctets",	&ng_parse_int64_type	},	\
93	  { NULL },						\
94	}							\
95}
96
97/* Netgraph commands */
98enum {
99	NGM_BPF_SET_PROGRAM = 1,	/* supply a struct ng_bpf_hookprog */
100	NGM_BPF_GET_PROGRAM,		/* returns a struct ng_bpf_hookprog */
101	NGM_BPF_GET_STATS,		/* supply name as char[NG_HOOKLEN+1] */
102	NGM_BPF_CLR_STATS,		/* supply name as char[NG_HOOKLEN+1] */
103	NGM_BPF_GETCLR_STATS,		/* supply name as char[NG_HOOKLEN+1] */
104};
105
106#endif /* _NETGRAPH_BPF_H_ */
107