1/*-
  2 * SPDX-License-Identifier: BSD-3-Clause
  3 *
  4 * Copyright (c) 1982, 1986, 1993
  5 *	The Regents of the University of California.  All rights reserved.
  6 *
  7 * Redistribution and use in source and binary forms, with or without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    notice, this list of conditions and the following disclaimer.
 12 * 2. Redistributions in binary form must reproduce the above copyright
 13 *    notice, this list of conditions and the following disclaimer in the
 14 *    documentation and/or other materials provided with the distribution.
 15 * 3. Neither the name of the University nor the names of its contributors
 16 *    may be used to endorse or promote products derived from this software
 17 *    without specific prior written permission.
 18 *
 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 29 * SUCH DAMAGE.
 30 *
 31 *	@(#)icmp_var.h	8.1 (Berkeley) 6/10/93
 32 */
 33
 34#ifndef _NETINET_ICMP_VAR_H_
 35#define _NETINET_ICMP_VAR_H_
 36
 37/*
 38 * Variables related to this implementation
 39 * of the internet control message protocol.
 40 */
 41struct	icmpstat {
 42/* statistics related to icmp packets generated */
 43	u_long	icps_error;		/* # of calls to icmp_error */
 44	u_long	icps_oldshort;		/* no error 'cuz old ip too short */
 45	u_long	icps_oldicmp;		/* no error 'cuz old was icmp */
 46	u_long	icps_outhist[ICMP_MAXTYPE + 1];
 47/* statistics related to input messages processed */
 48	u_long	icps_badcode;		/* icmp_code out of range */
 49	u_long	icps_tooshort;		/* packet < ICMP_MINLEN */
 50	u_long	icps_checksum;		/* bad checksum */
 51	u_long	icps_badlen;		/* calculated bound mismatch */
 52	u_long	icps_reflect;		/* number of responses */
 53	u_long	icps_inhist[ICMP_MAXTYPE + 1];
 54	u_long	icps_bmcastecho;	/* b/mcast echo requests dropped */
 55	u_long	icps_bmcasttstamp;	/* b/mcast tstamp requests dropped */
 56	u_long	icps_badaddr;		/* bad return address */
 57	u_long	icps_noroute;		/* no route back */
 58};
 59
 60#ifdef _KERNEL
 61#include <sys/counter.h>
 62
 63VNET_PCPUSTAT_DECLARE(struct icmpstat, icmpstat);
 64/*
 65 * In-kernel consumers can use these accessor macros directly to update
 66 * stats.
 67 */
 68#define	ICMPSTAT_ADD(name, val)	\
 69    VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name, (val))
 70#define	ICMPSTAT_INC(name)	ICMPSTAT_ADD(name, 1)
 71
 72/*
 73 * Kernel module consumers must use this accessor macro.
 74 */
 75void	kmod_icmpstat_inc(int statnum);
 76#define	KMOD_ICMPSTAT_INC(name)						\
 77    kmod_icmpstat_inc(offsetof(struct icmpstat, name) / sizeof(uint64_t))
 78#endif
 79
 80/*
 81 * Identifiers for ICMP sysctl nodes
 82 */
 83#define	ICMPCTL_MASKREPL	1	/* allow replies to netmask requests */
 84#define	ICMPCTL_STATS		2	/* statistics (read-only) */
 85#define ICMPCTL_ICMPLIM		3
 86
 87#ifdef _KERNEL
 88SYSCTL_DECL(_net_inet_icmp);
 89
 90extern int badport_bandlim(int);
 91#define BANDLIM_UNLIMITED -1
 92#define BANDLIM_ICMP_UNREACH 0
 93#define BANDLIM_ICMP_ECHO 1
 94#define BANDLIM_ICMP_TSTAMP 2
 95#define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
 96#define BANDLIM_RST_OPENPORT 4   /* No connection, listener */
 97#define BANDLIM_ICMP6_UNREACH 5
 98#define BANDLIM_SCTP_OOTB 6
 99#define BANDLIM_MAX 7
100#endif
101
102#endif