icmp_var.h

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/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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
 * $FreeBSD$
 */
 
#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_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 */
};
 
#ifdef _KERNEL
#include <sys/counter.h>
 
VNET_PCPUSTAT_DECLARE(struct icmpstat, icmpstat);
/*
 * In-kernel consumers can use these accessor macros directly to update
 * stats.
 */
#define ICMPSTAT_ADD(name, val) \
    VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name, (val))
#define ICMPSTAT_INC(name)      ICMPSTAT_ADD(name, 1)
 
/*
 * Kernel module consumers must use this accessor macro.
 */
void    kmod_icmpstat_inc(int statnum);
#define KMOD_ICMPSTAT_INC(name)                                         \
    kmod_icmpstat_inc(offsetof(struct icmpstat, name) / sizeof(uint64_t))
#endif
 
/*
 * Identifiers for ICMP sysctl nodes
 */
#define ICMPCTL_MASKREPL        1       /* allow replies to netmask requests */
#define ICMPCTL_STATS           2       /* statistics (read-only) */
#define ICMPCTL_ICMPLIM         3
 
#ifdef _KERNEL
SYSCTL_DECL(_net_inet_icmp);
 
extern int badport_bandlim(int);
#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_ICMP6_UNREACH 5
#define BANDLIM_SCTP_OOTB 6
#define BANDLIM_MAX 7
#endif
 
#endif