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/*
* 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.
*
* $Id: filter.h,v 1.13 1999/01/19 22:16:01 brian Exp $
*
* TODO:
*/
/*
* 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;
unsigned estab : 1;
unsigned syn : 1;
unsigned finrst : 1;
} opt;
};
#define MAXFILTERS 40 /* in each filter set */
struct filter {
struct filterent rule[MAXFILTERS]; /* incoming packet filter */
const char *name;
unsigned fragok : 1;
unsigned logok : 1;
};
#define FL_IN 0
#define FL_OUT 1
#define FL_DIAL 2
#define FL_KEEP 3
struct ipcp;
struct cmdargs;
extern int ParseAddr(struct ipcp *, const char *, struct in_addr *,
struct in_addr *, int *);
extern int filter_Show(struct cmdargs const *);
extern int filter_Set(struct cmdargs const *);
extern const char * filter_Action2Nam(int);
extern const char *filter_Proto2Nam(int);
extern const char *filter_Op2Nam(int);
extern struct in_addr bits2mask(int);
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