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

     /*
      * 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. 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.
     *
     *      @(#)icmp_var.h  8.1 (Berkeley) 6/10/93
     * $FreeBSD: src/sys/netinet/icmp_var.h,v 1.15.2.2 2001/12/07 09:23:11 ru Exp $
     * $DragonFly: src/sys/netinet/icmp_var.h,v 1.6 2006/05/20 02:42:12 dillon Exp $
     */
    
    #ifndef _NETINET_ICMP_VAR_H_
    #define _NETINET_ICMP_VAR_H_
    
    #ifndef _SYS_TYPES_H_
    #include <sys/types.h>
    #endif
    #ifndef _SYS_SYSCTL_H_
    #include <sys/sysctl.h>
    #endif
    #ifndef _NETINET_IP_ICMP_H_
    #include <netinet/ip_icmp.h>
    #endif
    
    #ifdef _KERNEL
    #include "opt_icmp_bandlim.h"           /* for ICMP_BANDLIM     */
    #endif
    
    /*
     * 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 */
    };
    
    /*
     * Names for ICMP sysctl objects
     */
    #define ICMPCTL_MASKREPL        1       /* allow replies to netmask requests */
    #define ICMPCTL_STATS           2       /* statistics (read-only) */
    #define ICMPCTL_ICMPLIM         3
    #define ICMPCTL_MAXID           4
    
    #define ICMPCTL_NAMES { \
            { 0, 0 }, \
            { "maskrepl", CTLTYPE_INT }, \
            { "stats", CTLTYPE_STRUCT }, \
            { "icmplim", CTLTYPE_INT }, \
    }
    
    #ifdef _KERNEL
    SYSCTL_DECL(_net_inet_icmp);
    extern struct icmpstat icmpstat;        /* icmp statistics */
    #ifdef ICMP_BANDLIM
    extern int badport_bandlim (int);
    #endif
    #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_MAX 4
   #endif
   
   #endif

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