1/*
2 * ng_bpf.h
3 */
4
5/*-
6 * Copyright (c) 1996-1999 Whistle Communications, Inc.
7 * All rights reserved.
8 *
9 * Subject to the following obligations and disclaimer of warranty, use and
10 * redistribution of this software, in source or object code forms, with or
11 * without modifications are expressly permitted by Whistle Communications;
12 * provided, however, that:
13 * 1. Any and all reproductions of the source or object code must include the
14 * copyright notice above and the following disclaimer of warranties; and
15 * 2. No rights are granted, in any manner or form, to use Whistle
16 * Communications, Inc. trademarks, including the mark "WHISTLE
17 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
18 * such appears in the above copyright notice or in the software.
19 *
20 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
21 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
22 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
23 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
25 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
26 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
27 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
28 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
29 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
30 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
31 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
36 * OF SUCH DAMAGE.
37 *
38 * Author: Archie Cobbs <archie@freebsd.org>
39 * $Whistle: ng_bpf.h,v 1.3 1999/12/03 20:30:23 archie Exp $
40 */
41
42#ifndef _NETGRAPH_NG_BPF_H_
43#define _NETGRAPH_NG_BPF_H_
44
45/* Node type name and magic cookie */
46#define NG_BPF_NODE_TYPE "bpf"
47#define NGM_BPF_COOKIE 944100792
48
49/* Program structure for one hook */
50struct ng_bpf_hookprog {
51 char thisHook[NG_HOOKSIZ]; /* name of hook */
52 char ifMatch[NG_HOOKSIZ]; /* match dest hook */
53 char ifNotMatch[NG_HOOKSIZ]; /* !match dest hook */
54 int32_t bpf_prog_len; /* #insns in program */
55 struct bpf_insn bpf_prog[]; /* bpf program */
56};
57
58#define NG_BPF_HOOKPROG_SIZE(numInsn) \
59 (sizeof(struct ng_bpf_hookprog) + (numInsn) * sizeof(struct bpf_insn))
60
61/* Keep this in sync with the above structure definition */
62#define NG_BPF_HOOKPROG_TYPE_INFO(bptype) { \
63 { "thisHook", &ng_parse_hookbuf_type }, \
64 { "ifMatch", &ng_parse_hookbuf_type }, \
65 { "ifNotMatch", &ng_parse_hookbuf_type }, \
66 { "bpf_prog_len", &ng_parse_int32_type }, \
67 { "bpf_prog", (bptype) }, \
68 { NULL } \
69}
70
71/* Statistics structure for one hook */
72struct ng_bpf_hookstat {
73 u_int64_t recvFrames;
74 u_int64_t recvOctets;
75 u_int64_t recvMatchFrames;
76 u_int64_t recvMatchOctets;
77 u_int64_t xmitFrames;
78 u_int64_t xmitOctets;
79};
80
81/* Keep this in sync with the above structure definition */
82#define NG_BPF_HOOKSTAT_TYPE_INFO { \
83 { "recvFrames", &ng_parse_uint64_type }, \
84 { "recvOctets", &ng_parse_uint64_type }, \
85 { "recvMatchFrames", &ng_parse_uint64_type }, \
86 { "recvMatchOctets", &ng_parse_uint64_type }, \
87 { "xmitFrames", &ng_parse_uint64_type }, \
88 { "xmitOctets", &ng_parse_uint64_type }, \
89 { NULL } \
90}
91
92/* Netgraph commands */
93enum {
94 NGM_BPF_SET_PROGRAM = 1, /* supply a struct ng_bpf_hookprog */
95 NGM_BPF_GET_PROGRAM, /* returns a struct ng_bpf_hookprog */
96 NGM_BPF_GET_STATS, /* supply name as char[NG_HOOKSIZ] */
97 NGM_BPF_CLR_STATS, /* supply name as char[NG_HOOKSIZ] */
98 NGM_BPF_GETCLR_STATS, /* supply name as char[NG_HOOKSIZ] */
99};
100
101#endif /* _NETGRAPH_NG_BPF_H_ */