Add RLIMIT_POSIXLOCKS support to csh/tcsh.
[dragonfly.git] / sys / net / pfil.h
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9e99d0a2
JR
1/* $NetBSD: pfil.h,v 1.22 2003/06/23 12:57:08 martin Exp $ */
2/* $DragonFly: src/sys/net/pfil.h,v 1.1 2003/12/02 09:18:17 asmodai 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#ifdef _KERNEL_OPT
36#include "opt_pfil_hooks.h"
37#endif
38
39#include <sys/queue.h>
40
41struct mbuf;
42struct ifnet;
43
44/*
45 * The packet filter hooks are designed for anything to call them to
46 * possibly intercept the packet.
47 */
48struct packet_filter_hook {
49 TAILQ_ENTRY(packet_filter_hook) pfil_link;
50 int (*pfil_func)(void *, struct mbuf **, struct ifnet *, int);
51 void *pfil_arg;
52 int pfil_flags;
53};
54
55#define PFIL_IN 0x00000001
56#define PFIL_OUT 0x00000002
57#define PFIL_WAITOK 0x00000004
58#define PFIL_ALL (PFIL_IN|PFIL_OUT)
59
60typedef TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
61
62#define PFIL_TYPE_AF 1 /* key is AF_* type */
63#define PFIL_TYPE_IFNET 2 /* key is ifnet pointer */
64
65struct pfil_head {
66 pfil_list_t ph_in;
67 pfil_list_t ph_out;
68 int ph_type;
69 union {
70 u_long phu_val;
71 void *phu_ptr;
72 } ph_un;
73#define ph_af ph_un.phu_val
74#define ph_ifnet ph_un.phu_ptr
75 LIST_ENTRY(pfil_head) ph_list;
76};
77typedef struct pfil_head pfil_head_t;
78
79int pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *,
80 int);
81
82int pfil_add_hook(int (*func)(void *, struct mbuf **,
83 struct ifnet *, int), void *, int, struct pfil_head *);
84int pfil_remove_hook(int (*func)(void *, struct mbuf **,
85 struct ifnet *, int), void *, int, struct pfil_head *);
86
87int pfil_head_register(struct pfil_head *);
88int pfil_head_unregister(struct pfil_head *);
89
90struct pfil_head *pfil_head_get(int, u_long);
91
92static __inline struct packet_filter_hook *
93pfil_hook_get(int dir, struct pfil_head *ph)
94{
95
96 if (dir == PFIL_IN)
97 return (TAILQ_FIRST(&ph->ph_in));
98 else if (dir == PFIL_OUT)
99 return (TAILQ_FIRST(&ph->ph_out));
100 else
101 return (NULL);
102}
103
104/* XXX */
105#if defined(_KERNEL_OPT)
106#include "ipfilter.h"
107#endif
108
109#if NIPFILTER > 0
110#ifdef PFIL_HOOKS
111#undef PFIL_HOOKS
112#endif
113#define PFIL_HOOKS
114#endif /* NIPFILTER */
115
116#endif /* _NET_PFIL_H_ */