83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/* $NetBSD: pfil.h,v 1.33 2017/01/16 09:28:40 ryo 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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*
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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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struct ifaddr;
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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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typedef int (*pfil_func_t)(void *, struct mbuf **, struct ifnet *, int);
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typedef void (*pfil_ifunc_t)(void *, unsigned long, void *);
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#define PFIL_IN 0x00000001
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#define PFIL_OUT 0x00000002
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#define PFIL_ALL (PFIL_IN|PFIL_OUT)
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#define PFIL_IFADDR 0x00000008
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#define PFIL_IFNET 0x00000010
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/* events notified by PFIL_IFNET */
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#define PFIL_IFNET_ATTACH 0
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#define PFIL_IFNET_DETACH 1
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#define PFIL_TYPE_AF 1 /* key is AF_* type */
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#define PFIL_TYPE_IFNET 2 /* key is ifnet or ifaddr pointer */
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typedef struct pfil_head pfil_head_t;
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#ifdef _KERNEL
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void pfil_init(void);
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int pfil_run_hooks(pfil_head_t *, struct mbuf **, struct ifnet *, int);
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void pfil_run_addrhooks(pfil_head_t *, unsigned long, struct ifaddr *);
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void pfil_run_ifhooks(pfil_head_t *, unsigned long, struct ifnet *);
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int pfil_add_hook(pfil_func_t, void *, int, pfil_head_t *);
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int pfil_remove_hook(pfil_func_t, void *, int, pfil_head_t *);
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int pfil_add_ihook(pfil_ifunc_t, void *, int, pfil_head_t *);
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int pfil_remove_ihook(pfil_ifunc_t, void *, int, pfil_head_t *);
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pfil_head_t * pfil_head_create(int, void *);
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void pfil_head_destroy(pfil_head_t *);
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pfil_head_t * pfil_head_get(int, void *);
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/* Packet filtering hook for interfaces (in sys/net/if.c module). */
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extern pfil_head_t *if_pfil;
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#endif /* _KERNEL */
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#endif /* !_NET_PFIL_H_ */
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