| | 1 | /* $NetBSD: pfil.h,v 1.22 2003/06/23 12:57:08 martin Exp $ */ |
| | 2 | /* $DragonFly: src/sys/net/pfil.h,v 1.11 2008/09/20 06:08:13 sephe Exp $ */ |
| | 3 | |
| | 4 | /* |
| | 5 | * Copyright (c) 1996 Matthew R. Green |
| | 6 | * All rights reserved. |
| | 7 | * |
| | 8 | * Redistribution and use in source and binary forms, with or without |
| | 9 | * modification, are permitted provided that the following conditions |
| | 10 | * are met: |
| | 11 | * 1. Redistributions of source code must retain the above copyright |
| | 12 | * notice, this list of conditions and the following disclaimer. |
| | 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 14 | * notice, this list of conditions and the following disclaimer in the |
| | 15 | * documentation and/or other materials provided with the distribution. |
| | 16 | * 3. The name of the author may not be used to endorse or promote products |
| | 17 | * derived from this software without specific prior written permission. |
| | 18 | * |
| | 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| | 20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| | 21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| | 22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| | 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| | 24 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| | 25 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| | 26 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| | 27 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 29 | * SUCH DAMAGE. |
| | 30 | */ |
| | 31 | |
| | 32 | #ifndef _NET_PFIL_H_ |
| | 33 | #define _NET_PFIL_H_ |
| | 34 | |
| | 35 | #ifndef _SYS_TYPES_H_ |
| | 36 | #include <sys/types.h> |
| | 37 | #endif |
| | 38 | #ifndef _SYS_PARAM_H_ |
| | 39 | #include <sys/param.h> |
| | 40 | #endif |
| | 41 | #ifndef _SYS_QUEUE_H_ |
| | 42 | #include <sys/queue.h> |
| | 43 | #endif |
| | 44 | |
| | 45 | struct mbuf; |
| | 46 | struct ifnet; |
| | 47 | struct packet_filter_hook; |
| | 48 | |
| | 49 | typedef int (*pfil_func_t)(void *, struct mbuf **, struct ifnet *, int); |
| | 50 | |
| | 51 | #define PFIL_IN 0x00000001 |
| | 52 | #define PFIL_OUT 0x00000002 |
| | 53 | #define PFIL_ALL (PFIL_IN|PFIL_OUT) |
| | 54 | |
| | 55 | typedef TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t; |
| | 56 | |
| | 57 | #define PFIL_TYPE_AF 1 /* key is AF_* type */ |
| | 58 | #define PFIL_TYPE_IFNET 2 /* key is ifnet pointer */ |
| | 59 | |
| | 60 | struct pfil_head { |
| | 61 | pfil_list_t *ph_in; |
| | 62 | pfil_list_t *ph_out; |
| | 63 | int ph_type; |
| | 64 | int ph_hashooks; /* 0 if no hooks installed */ |
| | 65 | union { |
| | 66 | u_long phu_val; |
| | 67 | void *phu_ptr; |
| | 68 | } ph_un; |
| | 69 | #define ph_af ph_un.phu_val |
| | 70 | #define ph_ifnet ph_un.phu_ptr |
| | 71 | LIST_ENTRY(pfil_head) ph_list; |
| | 72 | }; |
| | 73 | typedef struct pfil_head pfil_head_t; |
| | 74 | |
| | 75 | int pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *, int); |
| | 76 | |
| | 77 | int pfil_add_hook(pfil_func_t, void *, int, struct pfil_head *); |
| | 78 | int pfil_remove_hook(pfil_func_t, void *, int, struct pfil_head *); |
| | 79 | |
| | 80 | int pfil_head_register(struct pfil_head *); |
| | 81 | int pfil_head_unregister(struct pfil_head *); |
| | 82 | |
| | 83 | struct pfil_head *pfil_head_get(int, u_long); |
| | 84 | |
| | 85 | extern int filters_default_to_accept; |
| | 86 | |
| | 87 | /* |
| | 88 | * Used for a quick shortcut around the pfil routines if no hooks have been |
| | 89 | * installed. |
| | 90 | */ |
| | 91 | static __inline int |
| | 92 | pfil_has_hooks(struct pfil_head *ph) |
| | 93 | { |
| | 94 | return(ph->ph_hashooks); |
| | 95 | } |
| | 96 | |
| | 97 | /* XXX */ |
| | 98 | #if defined(_KERNEL_OPT) |
| | 99 | #include "ipfilter.h" |
| | 100 | #endif |
| | 101 | |
| | 102 | #endif /* _NET_PFIL_H_ */ |
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