1 /* $FreeBSD: src/sys/net/pfil.h,v 1.9 2002/03/24 09:34:04 bde Exp $ */
4 * Copyright (c) 1996 Matthew R. Green
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/queue.h>
40 * The packet filter hooks are designed for anything to call them to
41 * possibly intercept the packet.
43 struct packet_filter_hook {
44 TAILQ_ENTRY(packet_filter_hook) pfil_link;
45 int (*pfil_func)(void *, int, struct ifnet *, int, struct mbuf **);
49 #define PFIL_IN 0x00000001
50 #define PFIL_OUT 0x00000002
51 #define PFIL_WAITOK 0x00000004
52 #define PFIL_ALL (PFIL_IN|PFIL_OUT)
54 typedef TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
62 struct packet_filter_hook *pfil_hook_get(int, struct pfil_head *);
63 int pfil_add_hook(int (*func)(void *, int,
64 struct ifnet *, int, struct mbuf **), int, struct pfil_head *);
65 int pfil_remove_hook(int (*func)(void *, int,
66 struct ifnet *, int, struct mbuf **), int, struct pfil_head *);
69 #if defined(_KERNEL) && !defined(KLD_MODULE)
70 #include "opt_ipfilter.h"
80 #endif /* _NET_PFIL_H_ */