105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/* $NetBSD: pfil.h,v 1.17 2000/12/25 02:00:47 wiz 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>
|
|
#include <net/dlt.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 *, struct mbuf **, struct ifnet *, int);
|
|
void *pfil_arg;
|
|
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;
|
|
void *ph_key;
|
|
int ph_dlt;
|
|
LIST_ENTRY(pfil_head) ph_list;
|
|
};
|
|
typedef struct pfil_head pfil_head_t;
|
|
|
|
int pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *,
|
|
int);
|
|
|
|
int pfil_add_hook(int (*func)(void *, struct mbuf **,
|
|
struct ifnet *, int), void *, int, struct pfil_head *);
|
|
int pfil_remove_hook(int (*func)(void *, struct mbuf **,
|
|
struct ifnet *, int), void *, int, struct pfil_head *);
|
|
|
|
int pfil_head_register(struct pfil_head *);
|
|
int pfil_head_unregister(struct pfil_head *);
|
|
|
|
struct pfil_head *pfil_head_get(void *, int);
|
|
|
|
static __inline struct packet_filter_hook *
|
|
pfil_hook_get(int dir, struct pfil_head *ph)
|
|
{
|
|
|
|
if (dir == PFIL_IN)
|
|
return (TAILQ_FIRST(&ph->ph_in));
|
|
else if (dir == PFIL_OUT)
|
|
return (TAILQ_FIRST(&ph->ph_out));
|
|
else
|
|
return (NULL);
|
|
}
|
|
|
|
/* XXX */
|
|
#if defined(_KERNEL) && !defined(_LKM)
|
|
#include "ipfilter.h"
|
|
#endif
|
|
|
|
#if NIPFILTER > 0
|
|
#ifdef PFIL_HOOKS
|
|
#undef PFIL_HOOKS
|
|
#endif
|
|
#define PFIL_HOOKS
|
|
#endif /* NIPFILTER */
|
|
|
|
#endif /* _NET_PFIL_H_ */
|