/*
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)icmp_var.h	8.1 (Berkeley) 6/10/93
 * $FreeBSD: src/sys/netinet/icmp_var.h,v 1.15.2.2 2001/12/07 09:23:11 ru Exp $
 * $DragonFly: src/sys/netinet/icmp_var.h,v 1.6 2006/05/20 02:42:12 dillon Exp $
 */

#ifndef _NETINET_ICMP_VAR_H_
#define _NETINET_ICMP_VAR_H_

#ifndef _SYS_TYPES_H_
#include <sys/types.h>
#endif
#ifndef _SYS_SYSCTL_H_
#include <sys/sysctl.h>
#endif
#ifndef _NETINET_IP_ICMP_H_
#include <netinet/ip_icmp.h>
#endif

#ifdef _KERNEL
#include "opt_icmp_bandlim.h"		/* for ICMP_BANDLIM     */
#endif

/*
 * Variables related to this implementation
 * of the internet control message protocol.
 */
struct	icmpstat {
/* statistics related to icmp packets generated */
	u_long	icps_error;		/* # of calls to icmp_error */
	u_long	icps_oldshort;		/* no error 'cuz old ip too short */
	u_long	icps_oldicmp;		/* no error 'cuz old was icmp */
	u_long	icps_outhist[ICMP_MAXTYPE + 1];
/* statistics related to input messages processed */
	u_long	icps_badcode;		/* icmp_code out of range */
	u_long	icps_tooshort;		/* packet < ICMP_MINLEN */
	u_long	icps_checksum;		/* bad checksum */
	u_long	icps_badlen;		/* calculated bound mismatch */
	u_long	icps_reflect;		/* number of responses */
	u_long	icps_inhist[ICMP_MAXTYPE + 1];
	u_long	icps_bmcastecho;	/* b/mcast echo requests dropped */
	u_long	icps_bmcasttstamp;	/* b/mcast tstamp requests dropped */
	u_long	icps_badaddr;		/* bad return address */
	u_long	icps_noroute;		/* no route back */
};

/*
 * Names for ICMP sysctl objects
 */
#define	ICMPCTL_MASKREPL	1	/* allow replies to netmask requests */
#define	ICMPCTL_STATS		2	/* statistics (read-only) */
#define ICMPCTL_ICMPLIM		3
#define ICMPCTL_MAXID		4

#ifdef _KERNEL
SYSCTL_DECL(_net_inet_icmp);
extern struct icmpstat icmpstat;	/* icmp statistics */
#ifdef ICMP_BANDLIM
extern int badport_bandlim (int);
#endif
#define BANDLIM_UNLIMITED -1
#define BANDLIM_ICMP_UNREACH 0
#define BANDLIM_ICMP_ECHO 1
#define BANDLIM_ICMP_TSTAMP 2
#define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
#define BANDLIM_RST_OPENPORT 4   /* No connection, listener */
#define BANDLIM_MAX 4
#endif

#endif
