workbench/network/common/include/netinet/ip_icmp.h

   1 /*
   2  * Copyright (c) 1982, 1986 Regents of the University of California.
   3  * 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  *      @(#)ip_icmp.h   7.5 (Berkeley) 6/28/90
  34  */
  35
  36 #ifndef IP_ICMP_H
  37 #define IP_ICMP_H
  38
  39 /*
  40  * Interface Control Message Protocol Definitions.
  41  * Per RFC 792, September 1981.
  42  */
  43
  44 /*
  45  * Structure of an icmp header.
  46  */
  47 struct icmp {
  48         u_char  icmp_type;              /* type of message, see below */
  49         u_char  icmp_code;              /* type sub code */
  50         u_short icmp_cksum;             /* ones complement cksum of struct */
  51         union {
  52                 u_char ih_pptr;                 /* ICMP_PARAMPROB */
  53                 struct in_addr ih_gwaddr;       /* ICMP_REDIRECT */
  54                 struct ih_idseq {
  55                         n_short icd_id;
  56                         n_short icd_seq;
  57                 } ih_idseq;
  58                 int ih_void;
  59         } icmp_hun;
  60 #define icmp_pptr       icmp_hun.ih_pptr
  61 #define icmp_gwaddr     icmp_hun.ih_gwaddr
  62 #define icmp_id         icmp_hun.ih_idseq.icd_id
  63 #define icmp_seq        icmp_hun.ih_idseq.icd_seq
  64 #define icmp_void       icmp_hun.ih_void
  65         union {
  66                 struct id_ts {
  67                         n_time its_otime;
  68                         n_time its_rtime;
  69                         n_time its_ttime;
  70                 } id_ts;
  71                 struct id_ip  {
  72                         struct ip idi_ip;
  73                         /* options and then 64 bits of data */
  74                 } id_ip;
  75                 u_long  id_mask;
  76                 char    id_data[1];
  77         } icmp_dun;
  78 #define icmp_otime      icmp_dun.id_ts.its_otime
  79 #define icmp_rtime      icmp_dun.id_ts.its_rtime
  80 #define icmp_ttime      icmp_dun.id_ts.its_ttime
  81 #define icmp_ip         icmp_dun.id_ip.idi_ip
  82 #define icmp_mask       icmp_dun.id_mask
  83 #define icmp_data       icmp_dun.id_data
  84 };
  85
  86 /*
  87  * Lower bounds on packet lengths for various types.
  88  * For the error advice packets must first insure that the
  89  * packet is large enought to contain the returned ip header.
  90  * Only then can we do the check to see if 64 bits of packet
  91  * data have been returned, since we need to check the returned
  92  * ip header length.
  93  */
  94 #define ICMP_MINLEN     8                               /* abs minimum */
  95 #define ICMP_TSLEN      (8 + 3 * sizeof (n_time))       /* timestamp */
  96 #define ICMP_MASKLEN    12                              /* address mask */
  97 #define ICMP_ADVLENMIN  (8 + sizeof (struct ip) + 8)    /* min */
  98 #define ICMP_ADVLEN(p)  (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
  99         /* N.B.: must separately check that ip_hl >= 5 */
 100
 101 /*
 102  * Definition of type and code field values.
 103  */
 104 #define ICMP_ECHOREPLY          0               /* echo reply */
 105 #define ICMP_UNREACH            3               /* dest unreachable, codes: */
 106 #define         ICMP_UNREACH_NET        0               /* bad net */
 107 #define         ICMP_UNREACH_HOST       1               /* bad host */
 108 #define         ICMP_UNREACH_PROTOCOL   2               /* bad protocol */
 109 #define         ICMP_UNREACH_PORT       3               /* bad port */
 110 #define         ICMP_UNREACH_NEEDFRAG   4               /* IP_DF caused drop */
 111 #define         ICMP_UNREACH_SRCFAIL    5               /* src route failed */
 112 #define ICMP_SOURCEQUENCH       4               /* packet lost, slow down */
 113 #define ICMP_REDIRECT           5               /* shorter route, codes: */
 114 #define         ICMP_REDIRECT_NET       0               /* for network */
 115 #define         ICMP_REDIRECT_HOST      1               /* for host */
 116 #define         ICMP_REDIRECT_TOSNET    2               /* for tos and net */
 117 #define         ICMP_REDIRECT_TOSHOST   3               /* for tos and host */
 118 #define ICMP_ECHO               8               /* echo service */
 119 #define ICMP_TIMXCEED           11              /* time exceeded, code: */
 120 #define         ICMP_TIMXCEED_INTRANS   0               /* ttl==0 in transit */
 121 #define         ICMP_TIMXCEED_REASS     1               /* ttl==0 in reass */
 122 #define ICMP_PARAMPROB          12              /* ip header bad */
 123 #define ICMP_TSTAMP             13              /* timestamp request */
 124 #define ICMP_TSTAMPREPLY        14              /* timestamp reply */
 125 #define ICMP_IREQ               15              /* information request */
 126 #define ICMP_IREQREPLY          16              /* information reply */
 127 #define ICMP_MASKREQ            17              /* address mask request */
 128 #define ICMP_MASKREPLY          18              /* address mask reply */
 129
 130 #define ICMP_MAXTYPE            18
 131
 132 #define ICMP_INFOTYPE(type) \
 133         ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
 134         (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
 135         (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
 136         (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
 137
 138 #endif /* !IP_ICMP_H */