dlls/iphlpapi/ip_icmp.h

   1 /*
   2  * Copyright (c) 1982, 1986, 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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)ip_icmp.h   8.1 (Berkeley) 6/10/93
  30  * $FreeBSD: src/sys/netinet/ip_icmp.h,v 1.13 1999/08/28 00:49:24 peter Exp $
  31  */
  32
  33 #ifndef _NETINET_IP_ICMP_H_
  34 #define _NETINET_IP_ICMP_H_
  35
  36 /*
  37  * Interface Control Message Protocol Definitions.
  38  * Per RFC 792, September 1981.
  39  */
  40
  41 /*
  42  * Internal of an ICMP Router Advertisement
  43  */
  44 struct icmp_ra_addr {
  45         u_int32_t ira_addr;
  46         u_int32_t ira_preference;
  47 };
  48
  49 /*
  50  * Structure of an icmp header.
  51  */
  52 struct icmp {
  53         u_char  icmp_type;              /* type of message, see below */
  54         u_char  icmp_code;              /* type sub code */
  55         u_short icmp_cksum;             /* ones complement cksum of struct */
  56         union {
  57                 u_char ih_pptr;                 /* ICMP_PARAMPROB */
  58                 struct in_addr ih_gwaddr;       /* ICMP_REDIRECT */
  59                 struct ih_idseq {
  60                         n_short icd_id;
  61                         n_short icd_seq;
  62                 } ih_idseq;
  63                 int ih_void;
  64
  65                 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
  66                 struct ih_pmtu {
  67                         n_short ipm_void;
  68                         n_short ipm_nextmtu;
  69                 } ih_pmtu;
  70
  71                 struct ih_rtradv {
  72                         u_char irt_num_addrs;
  73                         u_char irt_wpa;
  74                         u_int16_t irt_lifetime;
  75                 } ih_rtradv;
  76         } icmp_hun;
  77 #define icmp_pptr       icmp_hun.ih_pptr
  78 #define icmp_gwaddr     icmp_hun.ih_gwaddr
  79 #define icmp_id         icmp_hun.ih_idseq.icd_id
  80 #define icmp_seq        icmp_hun.ih_idseq.icd_seq
  81 #define icmp_void       icmp_hun.ih_void
  82 #define icmp_pmvoid     icmp_hun.ih_pmtu.ipm_void
  83 #define icmp_nextmtu    icmp_hun.ih_pmtu.ipm_nextmtu
  84 #define icmp_num_addrs  icmp_hun.ih_rtradv.irt_num_addrs
  85 #define icmp_wpa        icmp_hun.ih_rtradv.irt_wpa
  86 #define icmp_lifetime   icmp_hun.ih_rtradv.irt_lifetime
  87         union {
  88                 struct id_ts {
  89                         n_time its_otime;
  90                         n_time its_rtime;
  91                         n_time its_ttime;
  92                 } id_ts;
  93                 struct id_ip  {
  94                         struct ip idi_ip;
  95                         /* options and then 64 bits of data */
  96                 } id_ip;
  97                 struct icmp_ra_addr id_radv;
  98                 u_int32_t id_mask;
  99                 char    id_data[1];
 100         } icmp_dun;
 101 #define icmp_otime      icmp_dun.id_ts.its_otime
 102 #define icmp_rtime      icmp_dun.id_ts.its_rtime
 103 #define icmp_ttime      icmp_dun.id_ts.its_ttime
 104 #define icmp_ip         icmp_dun.id_ip.idi_ip
 105 #define icmp_radv       icmp_dun.id_radv
 106 #define icmp_mask       icmp_dun.id_mask
 107 #define icmp_data       icmp_dun.id_data
 108 };
 109
 110 /*
 111  * Lower bounds on packet lengths for various types.
 112  * For the error advice packets must first insure that the
 113  * packet is large enough to contain the returned ip header.
 114  * Only then can we do the check to see if 64 bits of packet
 115  * data have been returned, since we need to check the returned
 116  * ip header length.
 117  */
 118 #define ICMP_MINLEN     8                               /* abs minimum */
 119 #define ICMP_TSLEN      (8 + 3 * sizeof (n_time))       /* timestamp */
 120 #define ICMP_MASKLEN    12                              /* address mask */
 121 #define ICMP_ADVLENMIN  (8 + sizeof (struct ip) + 8)    /* min */
 122 #ifndef _IP_VHL
 123 #define ICMP_ADVLEN(p)  (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
 124         /* N.B.: must separately check that ip_hl >= 5 */
 125 #else
 126 #define ICMP_ADVLEN(p)  (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
 127         /* N.B.: must separately check that header length >= 5 */
 128 #endif
 129
 130 /*
 131  * Definition of type and code field values.
 132  */
 133 #define ICMP_ECHOREPLY          0               /* echo reply */
 134 #define ICMP_UNREACH            3               /* dest unreachable, codes: */
 135 #define         ICMP_UNREACH_NET        0               /* bad net */
 136 #define         ICMP_UNREACH_HOST       1               /* bad host */
 137 #define         ICMP_UNREACH_PROTOCOL   2               /* bad protocol */
 138 #define         ICMP_UNREACH_PORT       3               /* bad port */
 139 #define         ICMP_UNREACH_NEEDFRAG   4               /* IP_DF caused drop */
 140 #define         ICMP_UNREACH_SRCFAIL    5               /* src route failed */
 141 #define         ICMP_UNREACH_NET_UNKNOWN 6              /* unknown net */
 142 #define         ICMP_UNREACH_HOST_UNKNOWN 7             /* unknown host */
 143 #define         ICMP_UNREACH_ISOLATED   8               /* src host isolated */
 144 #define         ICMP_UNREACH_NET_PROHIB 9               /* prohibited access */
 145 #define         ICMP_UNREACH_HOST_PROHIB 10             /* ditto */
 146 #define         ICMP_UNREACH_TOSNET     11              /* bad tos for net */
 147 #define         ICMP_UNREACH_TOSHOST    12              /* bad tos for host */
 148 #define         ICMP_UNREACH_FILTER_PROHIB 13           /* admin prohib */
 149 #define         ICMP_UNREACH_HOST_PRECEDENCE 14         /* host prec vio. */
 150 #define         ICMP_UNREACH_PRECEDENCE_CUTOFF 15       /* prec cutoff */
 151 #define ICMP_SOURCEQUENCH       4               /* packet lost, slow down */
 152 #define ICMP_REDIRECT           5               /* shorter route, codes: */
 153 #define         ICMP_REDIRECT_NET       0               /* for network */
 154 #define         ICMP_REDIRECT_HOST      1               /* for host */
 155 #define         ICMP_REDIRECT_TOSNET    2               /* for tos and net */
 156 #define         ICMP_REDIRECT_TOSHOST   3               /* for tos and host */
 157 #define ICMP_ECHO               8               /* echo service */
 158 #define ICMP_ROUTERADVERT       9               /* router advertisement */
 159 #define ICMP_ROUTERSOLICIT      10              /* router solicitation */
 160 #define ICMP_TIMXCEED           11              /* time exceeded, code: */
 161 #define         ICMP_TIMXCEED_INTRANS   0               /* ttl==0 in transit */
 162 #define         ICMP_TIMXCEED_REASS     1               /* ttl==0 in reass */
 163 #define ICMP_PARAMPROB          12              /* ip header bad */
 164 #define         ICMP_PARAMPROB_OPTABSENT 1              /* req. opt. absent */
 165 #define ICMP_TSTAMP             13              /* timestamp request */
 166 #define ICMP_TSTAMPREPLY        14              /* timestamp reply */
 167 #define ICMP_IREQ               15              /* information request */
 168 #define ICMP_IREQREPLY          16              /* information reply */
 169 #define ICMP_MASKREQ            17              /* address mask request */
 170 #define ICMP_MASKREPLY          18              /* address mask reply */
 171
 172 #define ICMP_MAXTYPE            18
 173
 174 #define ICMP_INFOTYPE(type) \
 175         ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
 176         (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
 177         (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
 178         (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
 179         (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
 180
 181 #ifdef KERNEL
 182 void    icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *));
 183 void    icmp_input __P((struct mbuf *, int));
 184 #endif
 185
 186 #endif