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pfil.h revision 1.13.4.1
      1  1.13.4.1       he /*	$NetBSD: pfil.h,v 1.13.4.1 2001/04/23 21:49:55 he 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       1.8      mrg  * 3. The name of the author may not be used to endorse or promote products
     16       1.1      mrg  *    derived from this software without specific prior written permission.
     17       1.1      mrg  *
     18       1.1      mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19       1.1      mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20       1.1      mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21       1.1      mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22       1.1      mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     23       1.1      mrg  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24       1.1      mrg  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     25       1.1      mrg  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     26       1.1      mrg  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27       1.1      mrg  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28       1.1      mrg  * SUCH DAMAGE.
     29       1.1      mrg  */
     30       1.1      mrg 
     31       1.1      mrg #ifndef _NET_PFIL_H_
     32       1.1      mrg #define _NET_PFIL_H_
     33       1.1      mrg 
     34      1.10  darrenr #include <sys/queue.h>
     35  1.13.4.1       he #include <sys/null.h>
     36       1.1      mrg 
     37      1.10  darrenr struct mbuf;
     38      1.10  darrenr struct ifnet;
     39       1.1      mrg 
     40       1.1      mrg /*
     41       1.1      mrg  * The packet filter hooks are designed for anything to call them to
     42       1.1      mrg  * possibly intercept the packet.
     43       1.1      mrg  */
     44       1.1      mrg struct packet_filter_hook {
     45       1.9      mrg         TAILQ_ENTRY(packet_filter_hook) pfil_link;
     46       1.1      mrg         int	(*pfil_func) __P((void *, int, struct ifnet *, int,
     47       1.1      mrg 				  struct mbuf **));
     48       1.1      mrg 	int	pfil_flags;
     49       1.1      mrg };
     50       1.1      mrg 
     51       1.1      mrg #define PFIL_IN		0x00000001
     52       1.1      mrg #define PFIL_OUT	0x00000002
     53      1.10  darrenr #define PFIL_WAITOK	0x00000004
     54       1.3      mrg #define PFIL_ALL	(PFIL_IN|PFIL_OUT)
     55       1.1      mrg 
     56      1.10  darrenr typedef	TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
     57      1.10  darrenr 
     58      1.10  darrenr struct pfil_head {
     59      1.10  darrenr 	pfil_list_t	ph_in;
     60      1.10  darrenr 	pfil_list_t	ph_out;
     61      1.10  darrenr 	int		ph_init;
     62      1.13   itojun };
     63      1.13   itojun typedef struct pfil_head pfil_head_t;
     64      1.10  darrenr 
     65      1.11  darrenr struct packet_filter_hook *pfil_hook_get __P((int, struct pfil_head *));
     66      1.12  darrenr int	pfil_add_hook __P((int (*func) __P((void *, int,
     67      1.11  darrenr 	    struct ifnet *, int, struct mbuf **)), int, struct pfil_head *));
     68      1.12  darrenr int	pfil_remove_hook __P((int (*func) __P((void *, int,
     69      1.11  darrenr 	    struct ifnet *, int, struct mbuf **)), int, struct pfil_head *));
     70       1.4      mrg 
     71       1.4      mrg /* XXX */
     72       1.7  thorpej #if defined(_KERNEL) && !defined(_LKM)
     73       1.4      mrg #include "ipfilter.h"
     74       1.5   scottr #endif
     75       1.4      mrg 
     76       1.4      mrg #if NIPFILTER > 0
     77       1.6   scottr #ifdef PFIL_HOOKS
     78       1.6   scottr #undef PFIL_HOOKS
     79       1.6   scottr #endif
     80       1.4      mrg #define PFIL_HOOKS
     81       1.4      mrg #endif /* NIPFILTER */
     82       1.1      mrg 
     83       1.1      mrg #endif /* _NET_PFIL_H_ */
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