/*      $OpenBSD: icmp_var.h,v 1.16 2020/08/22 17:55:54 gnezdo Exp $    */
/*      $NetBSD: icmp_var.h,v 1.8 1995/03/26 20:32:19 jtc Exp $ */

/*
 * 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
 */

#ifndef _NETINET_ICMP_VAR_H_
#define _NETINET_ICMP_VAR_H_

/*
 * 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_toofreq;           /* no error because rate limiter */
        u_long  icps_oldshort;          /* no error because old ip too short */
        u_long  icps_oldicmp;           /* no error because 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_bmcastecho;        /* rejected broadcast icmps */
        u_long  icps_inhist[ICMP_MAXTYPE + 1];
};

/*
 * Names for ICMP sysctl objects
 */
#define ICMPCTL_MASKREPL        1       /* allow replies to netmask requests */
#define ICMPCTL_BMCASTECHO      2       /* reply to icmps to broadcast/mcast */
#define ICMPCTL_ERRPPSLIMIT     3       /* ICMP error pps limitation */
#define ICMPCTL_REDIRACCEPT     4       /* Accept redirects from routers */
#define ICMPCTL_REDIRTIMEOUT    5       /* Remove routes added via redirects */
#define ICMPCTL_TSTAMPREPL      6       /* allow replies to timestamp requests */
#define ICMPCTL_STATS           7       /* ICMP statistics */
#define ICMPCTL_MAXID           8

#define ICMPCTL_NAMES { \
        { 0, 0 }, \
        { "maskrepl", CTLTYPE_INT }, \
        { "bmcastecho", CTLTYPE_INT }, \
        { "errppslimit", CTLTYPE_INT }, \
        { "rediraccept", CTLTYPE_INT }, \
        { "redirtimeout", CTLTYPE_INT }, \
        { "tstamprepl", CTLTYPE_INT }, \
        { "stats", CTLTYPE_STRUCT } \
}

#ifdef _KERNEL

#include <sys/percpu.h>

enum icmpstat_counters {
        icps_error,
        icps_toofreq,
        icps_oldshort,
        icps_oldicmp,
        icps_outhist,
        icps_badcode = icps_outhist + ICMP_MAXTYPE + 1,
        icps_tooshort,
        icps_checksum,
        icps_badlen,
        icps_reflect,
        icps_bmcastecho,
        icps_inhist,
        icps_ncounters = icps_inhist + ICMP_MAXTYPE + 1
};

extern struct cpumem *icmpcounters;

static inline void
icmpstat_inc(enum icmpstat_counters c)
{
        counters_inc(icmpcounters, c);
}

#endif /* _KERNEL */
#endif /* _NETINET_ICMP_VAR_H_ */