The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet/icmp_var.h

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    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  *      @(#)icmp_var.h  8.1 (Berkeley) 6/10/93
   32  * $FreeBSD: releng/12.0/sys/netinet/icmp_var.h 326023 2017-11-20 19:43:44Z pfg $
   33  */
   34 
   35 #ifndef _NETINET_ICMP_VAR_H_
   36 #define _NETINET_ICMP_VAR_H_
   37 
   38 
   39 /*
   40  * Variables related to this implementation
   41  * of the internet control message protocol.
   42  */
   43 struct  icmpstat {
   44 /* statistics related to icmp packets generated */
   45         u_long  icps_error;             /* # of calls to icmp_error */
   46         u_long  icps_oldshort;          /* no error 'cuz old ip too short */
   47         u_long  icps_oldicmp;           /* no error 'cuz old was icmp */
   48         u_long  icps_outhist[ICMP_MAXTYPE + 1];
   49 /* statistics related to input messages processed */
   50         u_long  icps_badcode;           /* icmp_code out of range */
   51         u_long  icps_tooshort;          /* packet < ICMP_MINLEN */
   52         u_long  icps_checksum;          /* bad checksum */
   53         u_long  icps_badlen;            /* calculated bound mismatch */
   54         u_long  icps_reflect;           /* number of responses */
   55         u_long  icps_inhist[ICMP_MAXTYPE + 1];
   56         u_long  icps_bmcastecho;        /* b/mcast echo requests dropped */
   57         u_long  icps_bmcasttstamp;      /* b/mcast tstamp requests dropped */
   58         u_long  icps_badaddr;           /* bad return address */
   59         u_long  icps_noroute;           /* no route back */
   60 };
   61 
   62 #ifdef _KERNEL
   63 #include <sys/counter.h>
   64 
   65 VNET_PCPUSTAT_DECLARE(struct icmpstat, icmpstat);
   66 /*
   67  * In-kernel consumers can use these accessor macros directly to update
   68  * stats.
   69  */
   70 #define ICMPSTAT_ADD(name, val) \
   71     VNET_PCPUSTAT_ADD(struct icmpstat, icmpstat, name, (val))
   72 #define ICMPSTAT_INC(name)      ICMPSTAT_ADD(name, 1)
   73 
   74 /*
   75  * Kernel module consumers must use this accessor macro.
   76  */
   77 void    kmod_icmpstat_inc(int statnum);
   78 #define KMOD_ICMPSTAT_INC(name)                                         \
   79     kmod_icmpstat_inc(offsetof(struct icmpstat, name) / sizeof(uint64_t))
   80 #endif
   81 
   82 /*
   83  * Identifiers for ICMP sysctl nodes
   84  */
   85 #define ICMPCTL_MASKREPL        1       /* allow replies to netmask requests */
   86 #define ICMPCTL_STATS           2       /* statistics (read-only) */
   87 #define ICMPCTL_ICMPLIM         3
   88 
   89 #ifdef _KERNEL
   90 SYSCTL_DECL(_net_inet_icmp);
   91 
   92 extern int badport_bandlim(int);
   93 #define BANDLIM_UNLIMITED -1
   94 #define BANDLIM_ICMP_UNREACH 0
   95 #define BANDLIM_ICMP_ECHO 1
   96 #define BANDLIM_ICMP_TSTAMP 2
   97 #define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
   98 #define BANDLIM_RST_OPENPORT 4   /* No connection, listener */
   99 #define BANDLIM_ICMP6_UNREACH 5
  100 #define BANDLIM_SCTP_OOTB 6
  101 #define BANDLIM_MAX 7
  102 #endif
  103 
  104 #endif

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