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
32#ifndef _NETINET_ICMP_VAR_H_
33#define _NETINET_ICMP_VAR_H_
34
35/*
36 * Variables related to this implementation
37 * of the internet control message protocol.
38 */
39struct	icmpstat {
40/* statistics related to icmp packets generated */
41	u_long	icps_error;		/* # of calls to icmp_error */
42	u_long	icps_oldshort;		/* no error 'cuz old ip too short */
43	u_long	icps_oldicmp;		/* no error 'cuz old was icmp */
44	u_long	icps_outhist[ICMP_MAXTYPE + 1];
45/* statistics related to input messages processed */
46	u_long	icps_badcode;		/* icmp_code out of range */
47	u_long	icps_tooshort;		/* packet < ICMP_MINLEN */
48	u_long	icps_checksum;		/* bad checksum */
49	u_long	icps_badlen;		/* calculated bound mismatch */
50	u_long	icps_reflect;		/* number of responses */
51	u_long	icps_inhist[ICMP_MAXTYPE + 1];
52	u_long	icps_bmcastecho;	/* b/mcast echo requests dropped */
53	u_long	icps_bmcasttstamp;	/* b/mcast tstamp requests dropped */
54	u_long	icps_badaddr;		/* bad return address */
55	u_long	icps_noroute;		/* no route back */
56};
57
58#ifdef _KERNEL
59#include <sys/counter.h>
60#include <netinet/in_kdtrace.h>
61
62VNET_PCPUSTAT_DECLARE(struct icmpstat, icmpstat);
63/*
64 * In-kernel consumers can use these accessor macros directly to update
65 * stats.
66 */
67#define ICMPSTAT_ADD(name, val)                                            \
68	do {                                                               \
69		MIB_SDT_PROBE1(icmp, count, name, (val));                  \
70		VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name, (val)); \
71	} while (0)
72
73#define	ICMPSTAT_INC(name)	ICMPSTAT_ADD(name, 1)
74#define ICMPSTAT_INC2(name, type)                                            \
75	do {                                                                 \
76		MIB_SDT_PROBE2(icmp, count, name, 1, type);                  \
77		VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name[type], 1); \
78	} while (0)
79
80/*
81 * Kernel module consumers must use this accessor macro.
82 */
83void	kmod_icmpstat_inc(int statnum);
84#define KMOD_ICMPSTAT_INC(name)                                          \
85	do {                                                             \
86		MIB_SDT_PROBE1(icmp, count, name, 1);                    \
87		kmod_icmpstat_inc(                                       \
88		    offsetof(struct icmpstat, name) / sizeof(uint64_t)); \
89	} while (0)
90#endif
91
92/*
93 * Identifiers for ICMP sysctl nodes
94 */
95#define	ICMPCTL_MASKREPL	1	/* allow replies to netmask requests */
96#define	ICMPCTL_STATS		2	/* statistics (read-only) */
97#define ICMPCTL_ICMPLIM		3
98
99#ifdef _KERNEL
100SYSCTL_DECL(_net_inet_icmp);
101
102extern int badport_bandlim(int);
103#define BANDLIM_UNLIMITED -1
104#define BANDLIM_ICMP_UNREACH 0
105#define BANDLIM_ICMP_ECHO 1
106#define BANDLIM_ICMP_TSTAMP 2
107#define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
108#define BANDLIM_RST_OPENPORT 4   /* No connection, listener */
109#define BANDLIM_ICMP6_UNREACH 5
110#define BANDLIM_SCTP_OOTB 6
111#define BANDLIM_MAX 7
112#endif
113
114#endif
115