kernel/pci: Remove embedded newlines in sysctl descriptions.
[dragonfly.git] / sys / net / pfil.h
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9e99d0a2 1/* $NetBSD: pfil.h,v 1.22 2003/06/23 12:57:08 martin Exp $ */
77e0b69a 2/* $DragonFly: src/sys/net/pfil.h,v 1.11 2008/09/20 06:08:13 sephe Exp $ */
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3
4/*
5 * Copyright (c) 1996 Matthew R. Green
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef _NET_PFIL_H_
33#define _NET_PFIL_H_
34
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35#ifndef _SYS_TYPES_H_
36#include <sys/types.h>
37#endif
38#ifndef _SYS_PARAM_H_
39#include <sys/param.h>
40#endif
41#ifndef _SYS_QUEUE_H_
9e99d0a2 42#include <sys/queue.h>
1bd40720 43#endif
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44
45struct mbuf;
46struct ifnet;
caa0af9f 47struct packet_filter_hook;
9e99d0a2 48
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49typedef int (*pfil_func_t)(void *, struct mbuf **, struct ifnet *, int);
50
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51#define PFIL_IN 0x00000001
52#define PFIL_OUT 0x00000002
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53#define PFIL_ALL (PFIL_IN|PFIL_OUT)
54
55typedef TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
56
57#define PFIL_TYPE_AF 1 /* key is AF_* type */
58#define PFIL_TYPE_IFNET 2 /* key is ifnet pointer */
59
60struct pfil_head {
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61 pfil_list_t *ph_in;
62 pfil_list_t *ph_out;
9e99d0a2 63 int ph_type;
afabe90c 64 int ph_hashooks; /* 0 if no hooks installed */
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65 union {
66 u_long phu_val;
67 void *phu_ptr;
68 } ph_un;
69#define ph_af ph_un.phu_val
70#define ph_ifnet ph_un.phu_ptr
71 LIST_ENTRY(pfil_head) ph_list;
72};
73typedef struct pfil_head pfil_head_t;
74
afabe90c 75int pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *, int);
9e99d0a2 76
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77int pfil_add_hook(pfil_func_t, void *, int, struct pfil_head *);
78int pfil_remove_hook(pfil_func_t, void *, int, struct pfil_head *);
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79
80int pfil_head_register(struct pfil_head *);
81int pfil_head_unregister(struct pfil_head *);
82
83struct pfil_head *pfil_head_get(int, u_long);
84
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85extern int filters_default_to_accept;
86
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87/*
88 * Used for a quick shortcut around the pfil routines if no hooks have been
89 * installed.
90 */
91static __inline int
92pfil_has_hooks(struct pfil_head *ph)
93{
94 return(ph->ph_hashooks);
95}
96
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97/* XXX */
98#if defined(_KERNEL_OPT)
99#include "ipfilter.h"
100#endif
101
9e99d0a2 102#endif /* _NET_PFIL_H_ */