sys/netinet/icmp_var.h

   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  */
  39 struct  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
  62 VNET_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  */
  83 void    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
 100 SYSCTL_DECL(_net_inet_icmp);
 101
 102 extern 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