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/* $FreeBSD: src/sys/net/pfil.h,v 1.9 2002/03/24 09:34:04 bde Exp $ */
/*
* Copyright (c) 1996 Matthew R. Green
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _NET_PFIL_H_
#define _NET_PFIL_H_
#include <sys/queue.h>
struct mbuf;
struct ifnet;
/*
* The packet filter hooks are designed for anything to call them to
* possibly intercept the packet.
*/
struct packet_filter_hook {
TAILQ_ENTRY(packet_filter_hook) pfil_link;
int (*pfil_func)(void *, int, struct ifnet *, int, struct mbuf **);
int pfil_flags;
};
#define PFIL_IN 0x00000001
#define PFIL_OUT 0x00000002
#define PFIL_WAITOK 0x00000004
#define PFIL_ALL (PFIL_IN|PFIL_OUT)
typedef TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
struct pfil_head {
pfil_list_t ph_in;
pfil_list_t ph_out;
int ph_init;
};
struct packet_filter_hook *pfil_hook_get(int, struct pfil_head *);
int pfil_add_hook(int (*func)(void *, int,
struct ifnet *, int, struct mbuf **), int, struct pfil_head *);
int pfil_remove_hook(int (*func)(void *, int,
struct ifnet *, int, struct mbuf **), int, struct pfil_head *);
/* XXX */
#if defined(_KERNEL) && !defined(KLD_MODULE)
#include "opt_ipfilter.h"
#endif
#if IPFILTER > 0
#ifdef PFIL_HOOKS
#undef PFIL_HOOKS
#endif
#define PFIL_HOOKS
#endif /* IPFILTER */
#endif /* _NET_PFIL_H_ */
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