1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the Internet Initiative Japan. The name of the
* IIJ may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $FreeBSD$
*
* TODO:
*/
#ifndef _FILTER_H_
#define _FILTER_H_
#define STREQ(a,b) (strcmp(a,b) == 0)
/*
* Actions
*/
#define A_NONE 0
#define A_PERMIT 1
#define A_DENY 2
#define A_MASK 3
#define A_UHOST 4
#define A_UPORT 8
/*
* Known protocols
*/
#define P_NONE 0
#define P_TCP 1
#define P_UDP 2
#define P_ICMP 3
/*
* Operations
*/
#define OP_NONE 0
#define OP_EQ 1
#define OP_GT 2
#define OP_LT 4
struct filterent {
int action; /* Filtering action */
int swidth; /* Effective source address width */
struct in_addr saddr; /* Source address */
struct in_addr smask; /* Source address mask */
int dwidth; /* Effective destination address width */
struct in_addr daddr; /* Destination address */
struct in_addr dmask; /* Destination address mask */
int proto; /* Protocol */
struct {
short srcop;
u_short srcport;
short dstop;
u_short dstport;
int estab;
} opt;
};
#define MAXFILTERS 20
#define FL_IN 0
#define FL_OUT 1
#define FL_DIAL 2
#define FL_KEEP 3
struct filterent ifilters[MAXFILTERS];
struct filterent ofilters[MAXFILTERS];
struct filterent dfilters[MAXFILTERS];
struct filterent afilters[MAXFILTERS]; /* keep Alive packet filter */
extern int ParseAddr __P((int, char **, struct in_addr *, struct in_addr *, int*));
#endif _FILTER_H_
|
