netwerk/sctp/src/user_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  */
  30
  31 #ifndef _USER_IP_ICMP_H_
  32 #define _USER_IP_ICMP_H_
  33
  34 /*
  35  * Interface Control Message Protocol Definitions.
  36  * Per RFC 792, September 1981.
  37  */
  38
  39 /*
  40  * Internal of an ICMP Router Advertisement
  41  */
  42 struct icmp_ra_addr {
  43         uint32_t ira_addr;
  44         uint32_t ira_preference;
  45 };
  46
  47 /*
  48  * Structure of an icmp header.
  49  */
  50 struct icmphdr {
  51         u_char  icmp_type;              /* type of message, see below */
  52         u_char  icmp_code;              /* type sub code */
  53         u_short icmp_cksum;             /* ones complement cksum of struct */
  54 };
  55
  56 #if defined(_WIN32)
  57 #pragma pack (push, 1)
  58 struct icmp6_hdr {
  59         uint8_t icmp6_type;
  60         uint8_t icmp6_code;
  61         uint16_t icmp6_cksum;
  62         union {
  63                 uint32_t icmp6_un_data32[1];
  64                 uint16_t icmp6_un_data16[2];
  65                 uint8_t icmp6_un_data8[4];
  66         } icmp6_dataun;
  67 };
  68 #pragma pack(pop)
  69
  70 #define icmp6_data32 icmp6_dataun.icmp6_un_data32
  71 #define icmp6_mtu icmp6_data32[0]
  72 #endif
  73
  74 /*
  75  * Structure of an icmp packet.
  76  *
  77  * XXX: should start with a struct icmphdr.
  78  */
  79 struct icmp {
  80         u_char  icmp_type;              /* type of message, see below */
  81         u_char  icmp_code;              /* type sub code */
  82         u_short icmp_cksum;             /* ones complement cksum of struct */
  83         union {
  84                 u_char ih_pptr;                 /* ICMP_PARAMPROB */
  85                 struct in_addr ih_gwaddr;       /* ICMP_REDIRECT */
  86                 struct ih_idseq {
  87                         uint16_t        icd_id; /* network format */
  88                         uint16_t        icd_seq; /* network format */
  89                 } ih_idseq;
  90                 int ih_void;
  91
  92                 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
  93                 struct ih_pmtu {
  94                         uint16_t ipm_void;      /* network format */
  95                         uint16_t ipm_nextmtu;   /* network format */
  96                 } ih_pmtu;
  97
  98                 struct ih_rtradv {
  99                         u_char irt_num_addrs;
 100                         u_char irt_wpa;
 101                         uint16_t irt_lifetime;
 102                 } ih_rtradv;
 103         } icmp_hun;
 104 #define icmp_pptr       icmp_hun.ih_pptr
 105 #define icmp_gwaddr     icmp_hun.ih_gwaddr
 106 #define icmp_id         icmp_hun.ih_idseq.icd_id
 107 #define icmp_seq        icmp_hun.ih_idseq.icd_seq
 108 #define icmp_void       icmp_hun.ih_void
 109 #define icmp_pmvoid     icmp_hun.ih_pmtu.ipm_void
 110 #define icmp_nextmtu    icmp_hun.ih_pmtu.ipm_nextmtu
 111 #define icmp_num_addrs  icmp_hun.ih_rtradv.irt_num_addrs
 112 #define icmp_wpa        icmp_hun.ih_rtradv.irt_wpa
 113 #define icmp_lifetime   icmp_hun.ih_rtradv.irt_lifetime
 114         union {
 115                 struct id_ts {                  /* ICMP Timestamp */
 116                         /*
 117                          * The next 3 fields are in network format,
 118                          * milliseconds since 00:00 GMT
 119                          */
 120                         uint32_t its_otime;     /* Originate */
 121                         uint32_t its_rtime;     /* Receive */
 122                         uint32_t its_ttime;     /* Transmit */
 123                 } id_ts;
 124                 struct id_ip  {
 125                         struct ip idi_ip;
 126                         /* options and then 64 bits of data */
 127                 } id_ip;
 128                 struct icmp_ra_addr id_radv;
 129                 uint32_t id_mask;
 130                 char    id_data[1];
 131         } icmp_dun;
 132 #define icmp_otime      icmp_dun.id_ts.its_otime
 133 #define icmp_rtime      icmp_dun.id_ts.its_rtime
 134 #define icmp_ttime      icmp_dun.id_ts.its_ttime
 135 #define icmp_ip         icmp_dun.id_ip.idi_ip
 136 #define icmp_radv       icmp_dun.id_radv
 137 #define icmp_mask       icmp_dun.id_mask
 138 #define icmp_data       icmp_dun.id_data
 139 };
 140
 141 /*
 142  * Lower bounds on packet lengths for various types.
 143  * For the error advice packets must first insure that the
 144  * packet is large enough to contain the returned ip header.
 145  * Only then can we do the check to see if 64 bits of packet
 146  * data have been returned, since we need to check the returned
 147  * ip header length.
 148  */
 149 #define ICMP_MINLEN     8                               /* abs minimum */
 150 #define ICMP_TSLEN      (8 + 3 * sizeof (uint32_t))     /* timestamp */
 151 #define ICMP_MASKLEN    12                              /* address mask */
 152 #define ICMP_ADVLENMIN  (8 + sizeof (struct ip) + 8)    /* min */
 153 #define ICMP_ADVLEN(p)  (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
 154         /* N.B.: must separately check that ip_hl >= 5 */
 155
 156 /*
 157  * Definition of type and code field values.
 158  */
 159 #define ICMP_ECHOREPLY          0               /* echo reply */
 160 #define ICMP_UNREACH            3               /* dest unreachable, codes: */
 161 #define         ICMP_UNREACH_NET        0               /* bad net */
 162 #define         ICMP_UNREACH_HOST       1               /* bad host */
 163 #define         ICMP_UNREACH_PROTOCOL   2               /* bad protocol */
 164 #define         ICMP_UNREACH_PORT       3               /* bad port */
 165 #define         ICMP_UNREACH_NEEDFRAG   4               /* IP_DF caused drop */
 166 #define         ICMP_UNREACH_SRCFAIL    5               /* src route failed */
 167 #define         ICMP_UNREACH_NET_UNKNOWN 6              /* unknown net */
 168 #define         ICMP_UNREACH_HOST_UNKNOWN 7             /* unknown host */
 169 #define         ICMP_UNREACH_ISOLATED   8               /* src host isolated */
 170 #define         ICMP_UNREACH_NET_PROHIB 9               /* prohibited access */
 171 #define         ICMP_UNREACH_HOST_PROHIB 10             /* ditto */
 172 #define         ICMP_UNREACH_TOSNET     11              /* bad tos for net */
 173 #define         ICMP_UNREACH_TOSHOST    12              /* bad tos for host */
 174 #define         ICMP_UNREACH_FILTER_PROHIB 13           /* admin prohib */
 175 #define         ICMP_UNREACH_HOST_PRECEDENCE 14         /* host prec vio. */
 176 #define         ICMP_UNREACH_PRECEDENCE_CUTOFF 15       /* prec cutoff */
 177 #define ICMP_SOURCEQUENCH       4               /* packet lost, slow down */
 178 #define ICMP_REDIRECT           5               /* shorter route, codes: */
 179 #define         ICMP_REDIRECT_NET       0               /* for network */
 180 #define         ICMP_REDIRECT_HOST      1               /* for host */
 181 #define         ICMP_REDIRECT_TOSNET    2               /* for tos and net */
 182 #define         ICMP_REDIRECT_TOSHOST   3               /* for tos and host */
 183 #define ICMP_ALTHOSTADDR        6               /* alternate host address */
 184 #define ICMP_ECHO               8               /* echo service */
 185 #define ICMP_ROUTERADVERT       9               /* router advertisement */
 186 #define         ICMP_ROUTERADVERT_NORMAL                0       /* normal advertisement */
 187 #define         ICMP_ROUTERADVERT_NOROUTE_COMMON        16      /* selective routing */
 188 #define ICMP_ROUTERSOLICIT      10              /* router solicitation */
 189 #define ICMP_TIMXCEED           11              /* time exceeded, code: */
 190 #define         ICMP_TIMXCEED_INTRANS   0               /* ttl==0 in transit */
 191 #define         ICMP_TIMXCEED_REASS     1               /* ttl==0 in reass */
 192 #define ICMP_PARAMPROB          12              /* ip header bad */
 193 #define         ICMP_PARAMPROB_ERRATPTR 0               /* error at param ptr */
 194 #define         ICMP_PARAMPROB_OPTABSENT 1              /* req. opt. absent */
 195 #define         ICMP_PARAMPROB_LENGTH 2                 /* bad length */
 196 #define ICMP_TSTAMP             13              /* timestamp request */
 197 #define ICMP_TSTAMPREPLY        14              /* timestamp reply */
 198 #define ICMP_IREQ               15              /* information request */
 199 #define ICMP_IREQREPLY          16              /* information reply */
 200 #define ICMP_MASKREQ            17              /* address mask request */
 201 #define ICMP_MASKREPLY          18              /* address mask reply */
 202 #define ICMP_TRACEROUTE         30              /* traceroute */
 203 #define ICMP_DATACONVERR        31              /* data conversion error */
 204 #define ICMP_MOBILE_REDIRECT    32              /* mobile host redirect */
 205 #define ICMP_IPV6_WHEREAREYOU   33              /* IPv6 where-are-you */
 206 #define ICMP_IPV6_IAMHERE       34              /* IPv6 i-am-here */
 207 #define ICMP_MOBILE_REGREQUEST  35              /* mobile registration req */
 208 #define ICMP_MOBILE_REGREPLY    36              /* mobile registration reply */
 209 #define ICMP_SKIP               39              /* SKIP */
 210 #define ICMP_PHOTURIS           40              /* Photuris */
 211 #define         ICMP_PHOTURIS_UNKNOWN_INDEX     1       /* unknown sec index */
 212 #define         ICMP_PHOTURIS_AUTH_FAILED       2       /* auth failed */
 213 #define         ICMP_PHOTURIS_DECRYPT_FAILED    3       /* decrypt failed */
 214
 215 #define ICMP_MAXTYPE            40
 216
 217 #define ICMP_INFOTYPE(type) \
 218         ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
 219         (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
 220         (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
 221         (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
 222         (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
 223
 224
 225 #endif