1/*-
2 * Copyright (c) 1982, 1986, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)icmp_var.h	8.1 (Berkeley) 6/10/93
30 * $FreeBSD$
31 */
32
33#ifndef _NETINET_ICMP_VAR_H_
34#define _NETINET_ICMP_VAR_H_
35
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 6
100#endif
101
102#endif
103