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 * $FreeBSD$
33 */
34
35#ifndef _NETINET_ICMP_VAR_H_
36#define _NETINET_ICMP_VAR_H_
37
38/*
39 * Variables related to this implementation
40 * of the internet control message protocol.
41 */
42struct	icmpstat {
43/* statistics related to icmp packets generated */
44	u_long	icps_error;		/* # of calls to icmp_error */
45	u_long	icps_oldshort;		/* no error 'cuz old ip too short */
46	u_long	icps_oldicmp;		/* no error 'cuz old was icmp */
47	u_long	icps_outhist[ICMP_MAXTYPE + 1];
48/* statistics related to input messages processed */
49	u_long	icps_badcode;		/* icmp_code out of range */
50	u_long	icps_tooshort;		/* packet < ICMP_MINLEN */
51	u_long	icps_checksum;		/* bad checksum */
52	u_long	icps_badlen;		/* calculated bound mismatch */
53	u_long	icps_reflect;		/* number of responses */
54	u_long	icps_inhist[ICMP_MAXTYPE + 1];
55	u_long	icps_bmcastecho;	/* b/mcast echo requests dropped */
56	u_long	icps_bmcasttstamp;	/* b/mcast tstamp requests dropped */
57	u_long	icps_badaddr;		/* bad return address */
58	u_long	icps_noroute;		/* no route back */
59};
60
61#ifdef _KERNEL
62#include <sys/counter.h>
63
64VNET_PCPUSTAT_DECLARE(struct icmpstat, icmpstat);
65/*
66 * In-kernel consumers can use these accessor macros directly to update
67 * stats.
68 */
69#define	ICMPSTAT_ADD(name, val)	\
70    VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name, (val))
71#define	ICMPSTAT_INC(name)	ICMPSTAT_ADD(name, 1)
72
73/*
74 * Kernel module consumers must use this accessor macro.
75 */
76void	kmod_icmpstat_inc(int statnum);
77#define	KMOD_ICMPSTAT_INC(name)						\
78    kmod_icmpstat_inc(offsetof(struct icmpstat, name) / sizeof(uint64_t))
79#endif
80
81/*
82 * Identifiers for ICMP sysctl nodes
83 */
84#define	ICMPCTL_MASKREPL	1	/* allow replies to netmask requests */
85#define	ICMPCTL_STATS		2	/* statistics (read-only) */
86#define ICMPCTL_ICMPLIM		3
87
88#ifdef _KERNEL
89SYSCTL_DECL(_net_inet_icmp);
90
91extern int badport_bandlim(int);
92#define BANDLIM_UNLIMITED -1
93#define BANDLIM_ICMP_UNREACH 0
94#define BANDLIM_ICMP_ECHO 1
95#define BANDLIM_ICMP_TSTAMP 2
96#define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
97#define BANDLIM_RST_OPENPORT 4   /* No connection, listener */
98#define BANDLIM_ICMP6_UNREACH 5
99#define BANDLIM_SCTP_OOTB 6
100#define BANDLIM_MAX 7
101#endif
102
103#endif
104