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pfil.h revision 1.1 
      1  1.1  mrg /*	$NetBSD: pfil.h,v 1.1 1996/09/14 14:40:21 mrg Exp $	*/
      2  1.1  mrg 
      3  1.1  mrg /*
      4  1.1  mrg  * Copyright (c) 1996 Matthew R. Green
      5  1.1  mrg  * All rights reserved.
      6  1.1  mrg  *
      7  1.1  mrg  * Redistribution and use in source and binary forms, with or without
      8  1.1  mrg  * modification, are permitted provided that the following conditions
      9  1.1  mrg  * are met:
     10  1.1  mrg  * 1. Redistributions of source code must retain the above copyright
     11  1.1  mrg  *    notice, this list of conditions and the following disclaimer.
     12  1.1  mrg  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1  mrg  *    notice, this list of conditions and the following disclaimer in the
     14  1.1  mrg  *    documentation and/or other materials provided with the distribution.
     15  1.1  mrg  * 3. All advertising materials mentioning features or use of this software
     16  1.1  mrg  *    must display the following acknowledgement:
     17  1.1  mrg  *      This product includes software developed by Matthew R. Green.
     18  1.1  mrg  * 4. The name of the author may not be used to endorse or promote products
     19  1.1  mrg  *    derived from this software without specific prior written permission.
     20  1.1  mrg  *
     21  1.1  mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  1.1  mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  1.1  mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  1.1  mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  1.1  mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     26  1.1  mrg  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     27  1.1  mrg  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     28  1.1  mrg  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     29  1.1  mrg  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  1.1  mrg  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  1.1  mrg  * SUCH DAMAGE.
     32  1.1  mrg  */
     33  1.1  mrg 
     34  1.1  mrg #ifndef _NET_PFIL_H_
     35  1.1  mrg #define _NET_PFIL_H_
     36  1.1  mrg 
     37  1.1  mrg /* note: this file needs <net/if.h> and <sys/mbuf.h> */
     38  1.1  mrg 
     39  1.1  mrg #ifdef _KERNEL
     40  1.1  mrg #include <sys/queue.h>
     41  1.1  mrg 
     42  1.1  mrg /*
     43  1.1  mrg  * The packet filter hooks are designed for anything to call them to
     44  1.1  mrg  * possibly intercept the packet.
     45  1.1  mrg  */
     46  1.1  mrg struct packet_filter_hook {
     47  1.1  mrg         LIST_ENTRY(packet_filter_hook) pfil_link;
     48  1.1  mrg         int	(*pfil_func) __P((void *, int, struct ifnet *, int,
     49  1.1  mrg 				  struct mbuf **));
     50  1.1  mrg 	int	pfil_flags;
     51  1.1  mrg };
     52  1.1  mrg 
     53  1.1  mrg #define PFIL_IN		0x00000001
     54  1.1  mrg #define PFIL_OUT	0x00000002
     55  1.1  mrg #define PFIL_BAD	0x00000004
     56  1.1  mrg #define PFIL_WAITOK	0x00000008
     57  1.1  mrg #define PFIL_ALL	(PFIL_IN|PFIL_OUT|PFIL_BAD)
     58  1.1  mrg 
     59  1.1  mrg struct packet_filter_hook *pfil_hook_get __P((int));
     60  1.1  mrg void	pfil_add_hook __P((int (*func) __P((void *, int,
     61  1.1  mrg 	    struct ifnet *, int, struct mbuf **)), int));
     62  1.1  mrg void	pfil_remove_hook __P((int (*func) __P((void *, int,
     63  1.1  mrg 	    struct ifnet *, int, struct mbuf **)), int));
     64  1.1  mrg #endif /* _KERNEL */
     65  1.1  mrg 
     66  1.1  mrg #endif /* _NET_PFIL_H_ */
     67