FreeBSD/Linux Kernel Cross Reference
sys/netns/ns_error.h

     /*
      * Copyright (c) 1984, 1988, 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.
     *
     *      @(#)ns_error.h  8.1 (Berkeley) 6/10/93
     * $FreeBSD: releng/5.0/sys/netns/ns_error.h 55205 1999-12-29 04:46:21Z peter $
     */
    
    #ifndef _NETNS_NS_ERROR_H_
    #define _NETNS_NS_ERROR_H_
    
    /*
     * Xerox NS error messages
     */
    
    struct ns_errp {
            u_short         ns_err_num;             /* Error Number */
            u_short         ns_err_param;           /* Error Parameter */
            struct idp      ns_err_idp;             /* Initial segment of offending
                                                       packet */
            u_char          ns_err_lev2[12];        /* at least this much higher
                                                       level protocol */
    };
    struct  ns_epidp {
            struct idp ns_ep_idp;
            struct ns_errp ns_ep_errp;
    };
    
    #define NS_ERR_UNSPEC   0       /* Unspecified Error detected at dest. */
    #define NS_ERR_BADSUM   1       /* Bad Checksum detected at dest */
    #define NS_ERR_NOSOCK   2       /* Specified socket does not exist at dest*/
    #define NS_ERR_FULLUP   3       /* Dest. refuses packet due to resource lim.*/
    #define NS_ERR_UNSPEC_T 0x200   /* Unspec. Error occured before reaching dest*/
    #define NS_ERR_BADSUM_T 0x201   /* Bad Checksum detected in transit */
    #define NS_ERR_UNREACH_HOST     0x202   /* Dest cannot be reached from here*/
    #define NS_ERR_TOO_OLD  0x203   /* Packet x'd 15 routers without delivery*/
    #define NS_ERR_TOO_BIG  0x204   /* Packet too large to be forwarded through
                                       some intermediate gateway.  The error
                                       parameter field contains the max packet
                                       size that can be accommodated */
    #define NS_ERR_MAX 20
    
    /*
     * Variables related to this implementation
     * of the network systems error message protocol.
     */
    struct  ns_errstat {
    /* statistics related to ns_err packets generated */
            int     ns_es_error;            /* # of calls to ns_error */
            int     ns_es_oldshort;         /* no error 'cuz old ip too short */
            int     ns_es_oldns_err;        /* no error 'cuz old was ns_err */
            int     ns_es_outhist[NS_ERR_MAX];
    /* statistics related to input messages processed */
            int     ns_es_badcode;          /* ns_err_code out of range */
            int     ns_es_tooshort;         /* packet < IDP_MINLEN */
            int     ns_es_checksum;         /* bad checksum */
            int     ns_es_badlen;           /* calculated bound mismatch */
            int     ns_es_reflect;          /* number of responses */
            int     ns_es_inhist[NS_ERR_MAX];
            u_short ns_es_codes[NS_ERR_MAX];/* which error code for outhist
                                               since we might not know all */
    };
    
    #ifdef _KERNEL
    struct  ns_errstat ns_errstat;
    #endif
    
    #endif

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