sys/netns/ns_error.h

/*
 * Copyright (c) 1984, 1988 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.
 *
 *      from: @(#)ns_error.h    7.5 (Berkeley) 6/28/90
 *      $Id: ns_error.h,v 1.2 1993/10/16 19:54:20 rgrimes Exp $
 */

#ifndef _NETNS_NS_ERROR_H_
#define _NETNS_NS_ERROR_H_ 1

/*
 * 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
extern struct   ns_errstat ns_errstat;
#endif
#endif /* _NETNS_NS_ERROR_H_ */