pfil_hook_get() is only used in pfil.c, so hide it
[dragonfly.git] / sys / net / pfil.h
... / ...
CommitLineData
1/* $NetBSD: pfil.h,v 1.22 2003/06/23 12:57:08 martin Exp $ */
2/* $DragonFly: src/sys/net/pfil.h,v 1.6 2008/09/14 02:05:07 sephe Exp $ */
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
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_
42#include <sys/queue.h>
43#endif
44
45struct mbuf;
46struct ifnet;
47
48/*
49 * The packet filter hooks are designed for anything to call them to
50 * possibly intercept the packet.
51 */
52struct packet_filter_hook {
53 TAILQ_ENTRY(packet_filter_hook) pfil_link;
54 int (*pfil_func)(void *, struct mbuf **, struct ifnet *, int);
55 void *pfil_arg;
56 int pfil_flags;
57};
58
59#define PFIL_IN 0x00000001
60#define PFIL_OUT 0x00000002
61#define PFIL_WAITOK 0x00000004
62#define PFIL_ALL (PFIL_IN|PFIL_OUT)
63
64typedef TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
65
66#define PFIL_TYPE_AF 1 /* key is AF_* type */
67#define PFIL_TYPE_IFNET 2 /* key is ifnet pointer */
68
69struct pfil_head {
70 pfil_list_t ph_in;
71 pfil_list_t ph_out;
72 int ph_type;
73 int ph_hashooks; /* 0 if no hooks installed */
74 union {
75 u_long phu_val;
76 void *phu_ptr;
77 } ph_un;
78#define ph_af ph_un.phu_val
79#define ph_ifnet ph_un.phu_ptr
80 LIST_ENTRY(pfil_head) ph_list;
81};
82typedef struct pfil_head pfil_head_t;
83
84int pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *, int);
85
86int pfil_add_hook(int (*func)(void *, struct mbuf **,
87 struct ifnet *, int), void *, int, struct pfil_head *);
88int pfil_remove_hook(int (*func)(void *, struct mbuf **,
89 struct ifnet *, int), void *, int, struct pfil_head *);
90
91int pfil_head_register(struct pfil_head *);
92int pfil_head_unregister(struct pfil_head *);
93
94struct pfil_head *pfil_head_get(int, u_long);
95
96/*
97 * Used for a quick shortcut around the pfil routines if no hooks have been
98 * installed.
99 */
100static __inline int
101pfil_has_hooks(struct pfil_head *ph)
102{
103 return(ph->ph_hashooks);
104}
105
106/* XXX */
107#if defined(_KERNEL_OPT)
108#include "ipfilter.h"
109#endif
110
111#endif /* _NET_PFIL_H_ */