NetBSD/sys/net/pfil.h

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1996-10-06 03:41:53 +04:00
/* $NetBSD: pfil.h,v 1.2 1996/10/05 23:41:54 mrg 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
1996-10-06 03:41:53 +04:00
* This product includes software developed by Matthew R. Green for
* the NetBSD Project.
* 4. 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_
/* note: this file needs <net/if.h> and <sys/mbuf.h> */
#ifdef _KERNEL
#include <sys/queue.h>
/*
* The packet filter hooks are designed for anything to call them to
* possibly intercept the packet.
*/
struct packet_filter_hook {
LIST_ENTRY(packet_filter_hook) pfil_link;
int (*pfil_func) __P((void *, int, struct ifnet *, int,
struct mbuf **));
int pfil_flags;
};
#define PFIL_IN 0x00000001
#define PFIL_OUT 0x00000002
#define PFIL_BAD 0x00000004
#define PFIL_WAITOK 0x00000008
#define PFIL_ALL (PFIL_IN|PFIL_OUT|PFIL_BAD)
struct packet_filter_hook *pfil_hook_get __P((int));
void pfil_add_hook __P((int (*func) __P((void *, int,
struct ifnet *, int, struct mbuf **)), int));
void pfil_remove_hook __P((int (*func) __P((void *, int,
struct ifnet *, int, struct mbuf **)), int));
#endif /* _KERNEL */
#endif /* _NET_PFIL_H_ */