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