1/* $FreeBSD: head/sys/net/pfil.h 130731 2004-06-19 14:58:35Z bde $ */
| 1/* $FreeBSD: head/sys/net/pfil.h 135920 2004-09-29 04:54:33Z mlaier $ */
|
2/* $NetBSD: pfil.h,v 1.22 2003/06/23 12:57:08 martin 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#include <sys/systm.h>
36#include <sys/queue.h>
37#include <sys/_lock.h>
38#include <sys/_mutex.h>
39#include <sys/condvar.h> /* XXX */
40
41struct mbuf;
42struct ifnet;
| 2/* $NetBSD: pfil.h,v 1.22 2003/06/23 12:57:08 martin 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#include <sys/systm.h>
36#include <sys/queue.h>
37#include <sys/_lock.h>
38#include <sys/_mutex.h>
39#include <sys/condvar.h> /* XXX */
40
41struct mbuf;
42struct ifnet;
|
| 43struct inpcb;
|
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;
| 44
45/*
46 * The packet filter hooks are designed for anything to call them to
47 * possibly intercept the packet.
48 */
49struct packet_filter_hook {
50 TAILQ_ENTRY(packet_filter_hook) pfil_link;
|
50 int (*pfil_func)(void *, struct mbuf **, struct ifnet *, int);
| 51 int (*pfil_func)(void *, struct mbuf **, struct ifnet *, int, struct inpcb *);
|
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 /*
70 * Locking: use a busycounter per pfil_head.
71 * Use ph_busy_count = -1 to indicate pfil_head is empty.
72 */
73 int ph_busy_count; /* count of threads with read lock */
74 int ph_want_write; /* want write lock flag */
75 struct cv ph_cv; /* for waking up writers */
76 struct mtx ph_mtx; /* mutex on locking state */
77 union {
78 u_long phu_val;
79 void *phu_ptr;
80 } ph_un;
81#define ph_af ph_un.phu_val
82#define ph_ifnet ph_un.phu_ptr
83 LIST_ENTRY(pfil_head) ph_list;
84};
85
86int pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *,
| 52 void *pfil_arg;
53 int pfil_flags;
54};
55
56#define PFIL_IN 0x00000001
57#define PFIL_OUT 0x00000002
58#define PFIL_WAITOK 0x00000004
59#define PFIL_ALL (PFIL_IN|PFIL_OUT)
60
61typedef TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
62
63#define PFIL_TYPE_AF 1 /* key is AF_* type */
64#define PFIL_TYPE_IFNET 2 /* key is ifnet pointer */
65
66struct pfil_head {
67 pfil_list_t ph_in;
68 pfil_list_t ph_out;
69 int ph_type;
70 /*
71 * Locking: use a busycounter per pfil_head.
72 * Use ph_busy_count = -1 to indicate pfil_head is empty.
73 */
74 int ph_busy_count; /* count of threads with read lock */
75 int ph_want_write; /* want write lock flag */
76 struct cv ph_cv; /* for waking up writers */
77 struct mtx ph_mtx; /* mutex on locking state */
78 union {
79 u_long phu_val;
80 void *phu_ptr;
81 } ph_un;
82#define ph_af ph_un.phu_val
83#define ph_ifnet ph_un.phu_ptr
84 LIST_ENTRY(pfil_head) ph_list;
85};
86
87int pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *,
|
87 int);
| 88 int, struct inpcb *inp);
|
88
89int pfil_add_hook(int (*func)(void *, struct mbuf **,
| 89
90int pfil_add_hook(int (*func)(void *, struct mbuf **,
|
90 struct ifnet *, int), void *, int, struct pfil_head *);
| 91 struct ifnet *, int, struct inpcb *), void *, int, struct pfil_head *);
|
91int pfil_remove_hook(int (*func)(void *, struct mbuf **,
| 92int pfil_remove_hook(int (*func)(void *, struct mbuf **,
|
92 struct ifnet *, int), void *, int, struct pfil_head *);
| 93 struct ifnet *, int, struct inpcb *), void *, int, struct pfil_head *);
|
93
94int pfil_head_register(struct pfil_head *);
95int pfil_head_unregister(struct pfil_head *);
96
97struct pfil_head *pfil_head_get(int, u_long);
98
99static __inline struct packet_filter_hook *
100pfil_hook_get(int dir, struct pfil_head *ph)
101{
102 KASSERT(ph->ph_busy_count > 0,
103 ("pfil_hook_get: called on unbusy pfil_head"));
104 if (dir == PFIL_IN)
105 return (TAILQ_FIRST(&ph->ph_in));
106 else if (dir == PFIL_OUT)
107 return (TAILQ_FIRST(&ph->ph_out));
108 else
109 return (NULL);
110}
111
112#endif /* _NET_PFIL_H_ */
| 94
95int pfil_head_register(struct pfil_head *);
96int pfil_head_unregister(struct pfil_head *);
97
98struct pfil_head *pfil_head_get(int, u_long);
99
100static __inline struct packet_filter_hook *
101pfil_hook_get(int dir, struct pfil_head *ph)
102{
103 KASSERT(ph->ph_busy_count > 0,
104 ("pfil_hook_get: called on unbusy pfil_head"));
105 if (dir == PFIL_IN)
106 return (TAILQ_FIRST(&ph->ph_in));
107 else if (dir == PFIL_OUT)
108 return (TAILQ_FIRST(&ph->ph_out));
109 else
110 return (NULL);
111}
112
113#endif /* _NET_PFIL_H_ */
|