/*
 *	    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 1.3 1995/03/11 15:18:41 amurai Exp $
 *
 *	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_
