sys/netproto/ns/ns_error.h

   1 /*
   2  * Copyright (c) 1984, 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)ns_error.h  8.1 (Berkeley) 6/10/93
  34  * $FreeBSD: src/sys/netns/ns_error.h,v 1.10 1999/12/29 04:46:19 peter Exp $
  35  * $DragonFly: src/sys/netproto/ns/ns_error.h,v 1.4 2004/02/16 20:37:20 dillon Exp $
  36  */
  37
  38 #ifndef _NETNS_NS_ERROR_H_
  39 #define _NETNS_NS_ERROR_H_
  40
  41 /*
  42  * Xerox NS error messages
  43  */
  44
  45 struct ns_errp {
  46         u_short         ns_err_num;             /* Error Number */
  47         u_short         ns_err_param;           /* Error Parameter */
  48         struct idp      ns_err_idp;             /* Initial segment of offending
  49                                                    packet */
  50         u_char          ns_err_lev2[12];        /* at least this much higher
  51                                                    level protocol */
  52 };
  53 struct  ns_epidp {
  54         struct idp ns_ep_idp;
  55         struct ns_errp ns_ep_errp;
  56 };
  57
  58 #define NS_ERR_UNSPEC   0       /* Unspecified Error detected at dest. */
  59 #define NS_ERR_BADSUM   1       /* Bad Checksum detected at dest */
  60 #define NS_ERR_NOSOCK   2       /* Specified socket does not exist at dest*/
  61 #define NS_ERR_FULLUP   3       /* Dest. refuses packet due to resource lim.*/
  62 #define NS_ERR_UNSPEC_T 0x200   /* Unspec. Error occured before reaching dest*/
  63 #define NS_ERR_BADSUM_T 0x201   /* Bad Checksum detected in transit */
  64 #define NS_ERR_UNREACH_HOST     0x202   /* Dest cannot be reached from here*/
  65 #define NS_ERR_TOO_OLD  0x203   /* Packet x'd 15 routers without delivery*/
  66 #define NS_ERR_TOO_BIG  0x204   /* Packet too large to be forwarded through
  67                                    some intermediate gateway.  The error
  68                                    parameter field contains the max packet
  69                                    size that can be accommodated */
  70 #define NS_ERR_MAX 20
  71
  72 /*
  73  * Variables related to this implementation
  74  * of the network systems error message protocol.
  75  */
  76 struct  ns_errstat {
  77 /* statistics related to ns_err packets generated */
  78         int     ns_es_error;            /* # of calls to ns_error */
  79         int     ns_es_oldshort;         /* no error 'cuz old ip too short */
  80         int     ns_es_oldns_err;        /* no error 'cuz old was ns_err */
  81         int     ns_es_outhist[NS_ERR_MAX];
  82 /* statistics related to input messages processed */
  83         int     ns_es_badcode;          /* ns_err_code out of range */
  84         int     ns_es_tooshort;         /* packet < IDP_MINLEN */
  85         int     ns_es_checksum;         /* bad checksum */
  86         int     ns_es_badlen;           /* calculated bound mismatch */
  87         int     ns_es_reflect;          /* number of responses */
  88         int     ns_es_inhist[NS_ERR_MAX];
  89         u_short ns_es_codes[NS_ERR_MAX];/* which error code for outhist
  90                                            since we might not know all */
  91 };
  92
  93 #ifdef _KERNEL
  94 extern struct   ns_errstat ns_errstat;
  95
  96 int ns_err_x (int);
  97 void ns_error (struct mbuf *, int, int);
  98 int ns_echo (struct mbuf *);
  99 void ns_printhost (struct ns_addr *);
 100 void ns_err_input (struct mbuf *);
 101
 102 #endif
 103
 104 #endif