1 /* $NetBSD: pfil.h,v 1.31 2013/06/29 21:06:58 rmind 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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/queue.h>
38 * The packet filter hooks are designed for anything to call them to
39 * possibly intercept the packet.
41 typedef int (*pfil_func_t
)(void *, struct mbuf
**, struct ifnet
*, int);
43 #define PFIL_IN 0x00000001
44 #define PFIL_OUT 0x00000002
45 #define PFIL_ALL (PFIL_IN|PFIL_OUT)
46 #define PFIL_IFADDR 0x00000008
47 #define PFIL_IFNET 0x00000010
49 /* events notified by PFIL_IFNET */
50 #define PFIL_IFNET_ATTACH 0
51 #define PFIL_IFNET_DETACH 1
53 #define PFIL_TYPE_AF 1 /* key is AF_* type */
54 #define PFIL_TYPE_IFNET 2 /* key is ifnet pointer */
56 typedef struct pfil_head pfil_head_t
;
60 int pfil_run_hooks(pfil_head_t
*, struct mbuf
**, struct ifnet
*, int);
61 int pfil_add_hook(pfil_func_t
, void *, int, pfil_head_t
*);
62 int pfil_remove_hook(pfil_func_t
, void *, int, pfil_head_t
*);
64 pfil_head_t
* pfil_head_create(int, void *);
65 void pfil_head_destroy(pfil_head_t
*);
66 pfil_head_t
* pfil_head_get(int, void *);
68 /* Packet filtering hook for interfaces (in sys/net/if.c module). */
69 extern pfil_head_t
*if_pfil
;
73 #endif /* !_NET_PFIL_H_ */