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icmp_var.h
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icmp_var.h
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _NETINET_ICMP_VAR_H_
#define _NETINET_ICMP_VAR_H_
/*
* Variables related to this implementation
* of the internet control message protocol.
*/
struct icmpstat {
/* statistics related to icmp packets generated */
u_long icps_error; /* # of calls to icmp_error */
u_long icps_oldshort; /* no error 'cuz old ip too short */
u_long icps_oldicmp; /* no error 'cuz old was icmp */
u_long icps_outhist[ICMP_MAXTYPE + 1];
/* statistics related to input messages processed */
u_long icps_badcode; /* icmp_code out of range */
u_long icps_tooshort; /* packet < ICMP_MINLEN */
u_long icps_checksum; /* bad checksum */
u_long icps_badlen; /* calculated bound mismatch */
u_long icps_reflect; /* number of responses */
u_long icps_inhist[ICMP_MAXTYPE + 1];
u_long icps_bmcastecho; /* b/mcast echo requests dropped */
u_long icps_bmcasttstamp; /* b/mcast tstamp requests dropped */
u_long icps_badaddr; /* bad return address */
u_long icps_noroute; /* no route back */
};
#ifdef _KERNEL
#include <sys/counter.h>
#include <netinet/in_kdtrace.h>
VNET_PCPUSTAT_DECLARE(struct icmpstat, icmpstat);
/*
* In-kernel consumers can use these accessor macros directly to update
* stats.
*/
#define ICMPSTAT_ADD(name, val) \
do { \
MIB_SDT_PROBE1(icmp, count, name, (val)); \
VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name, (val)); \
} while (0)
#define ICMPSTAT_INC(name) ICMPSTAT_ADD(name, 1)
#define ICMPSTAT_INC2(name, type) \
do { \
MIB_SDT_PROBE2(icmp, count, name, 1, type); \
VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name[type], 1); \
} while (0)
/*
* Kernel module consumers must use this accessor macro.
*/
void kmod_icmpstat_inc(int statnum);
#define KMOD_ICMPSTAT_INC(name) \
do { \
MIB_SDT_PROBE1(icmp, count, name, 1); \
kmod_icmpstat_inc( \
offsetof(struct icmpstat, name) / sizeof(uint64_t)); \
} while (0)
#endif
/*
* Identifiers for ICMP sysctl nodes
*/
#define ICMPCTL_MASKREPL 1 /* allow replies to netmask requests */
#define ICMPCTL_STATS 2 /* statistics (read-only) */
#define ICMPCTL_ICMPLIM 3
#ifdef _KERNEL
SYSCTL_DECL(_net_inet_icmp);
extern int badport_bandlim(int);
#define BANDLIM_UNLIMITED -1
#define BANDLIM_ICMP_UNREACH 0
#define BANDLIM_ICMP_ECHO 1
#define BANDLIM_ICMP_TSTAMP 2
#define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
#define BANDLIM_RST_OPENPORT 4 /* No connection, listener */
#define BANDLIM_ICMP6_UNREACH 5
#define BANDLIM_SCTP_OOTB 6
#define BANDLIM_MAX 7
#endif
#endif