xref: /freebsd/sys/netinet/icmp_var.h (revision 9162f64b58d01ec01481d60b6cdc06ffd8e8c7fc)
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  */
41 struct	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 /*
61  * Names for ICMP sysctl objects
62  */
63 #define	ICMPCTL_MASKREPL	1	/* allow replies to netmask requests */
64 #define	ICMPCTL_STATS		2	/* statistics (read-only) */
65 #define ICMPCTL_ICMPLIM		3
66 #define ICMPCTL_MAXID		4
67 
68 #define ICMPCTL_NAMES { \
69 	{ 0, 0 }, \
70 	{ "maskrepl", CTLTYPE_INT }, \
71 	{ "stats", CTLTYPE_STRUCT }, \
72 	{ "icmplim", CTLTYPE_INT }, \
73 }
74 
75 #ifdef _KERNEL
76 SYSCTL_DECL(_net_inet_icmp);
77 #ifdef VIMAGE_GLOBALS
78 extern struct icmpstat icmpstat;	/* icmp statistics */
79 #endif
80 extern int badport_bandlim(int);
81 #define BANDLIM_UNLIMITED -1
82 #define BANDLIM_ICMP_UNREACH 0
83 #define BANDLIM_ICMP_ECHO 1
84 #define BANDLIM_ICMP_TSTAMP 2
85 #define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
86 #define BANDLIM_RST_OPENPORT 4   /* No connection, listener */
87 #define BANDLIM_ICMP6_UNREACH 5
88 #define BANDLIM_MAX 5
89 #endif
90 
91 #endif
92