inet/netinet/icmp6.h

   1 /* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _NETINET_ICMP6_H
  20 #define _NETINET_ICMP6_H 1
  21
  22 #include <inttypes.h>
  23 #include <string.h>
  24 #include <sys/types.h>
  25 #include <netinet/in.h>
  26
  27 #define ICMP6_FILTER 1
  28
  29 #define ICMP6_FILTER_BLOCK              1
  30 #define ICMP6_FILTER_PASS               2
  31 #define ICMP6_FILTER_BLOCKOTHERS        3
  32 #define ICMP6_FILTER_PASSONLY           4
  33
  34 struct icmp6_filter
  35   {
  36     uint32_t data[8];
  37   };
  38
  39 struct icmp6_hdr
  40   {
  41     uint8_t     icmp6_type;   /* type field */
  42     uint8_t     icmp6_code;   /* code field */
  43     uint16_t    icmp6_cksum;  /* checksum field */
  44     union
  45       {
  46         uint32_t  icmp6_un_data32[1]; /* type-specific field */
  47         uint16_t  icmp6_un_data16[2]; /* type-specific field */
  48         uint8_t   icmp6_un_data8[4];  /* type-specific field */
  49       } icmp6_dataun;
  50   };
  51
  52 #define icmp6_data32    icmp6_dataun.icmp6_un_data32
  53 #define icmp6_data16    icmp6_dataun.icmp6_un_data16
  54 #define icmp6_data8     icmp6_dataun.icmp6_un_data8
  55 #define icmp6_pptr      icmp6_data32[0]  /* parameter prob */
  56 #define icmp6_mtu       icmp6_data32[0]  /* packet too big */
  57 #define icmp6_id        icmp6_data16[0]  /* echo request/reply */
  58 #define icmp6_seq       icmp6_data16[1]  /* echo request/reply */
  59 #define icmp6_maxdelay  icmp6_data16[0]  /* mcast group membership */
  60
  61 #define ICMP6_DST_UNREACH             1
  62 #define ICMP6_PACKET_TOO_BIG          2
  63 #define ICMP6_TIME_EXCEEDED           3
  64 #define ICMP6_PARAM_PROB              4
  65
  66 #define ICMP6_INFOMSG_MASK  0x80    /* all informational messages */
  67
  68 #define ICMP6_ECHO_REQUEST          128
  69 #define ICMP6_ECHO_REPLY            129
  70 #define ICMP6_MEMBERSHIP_QUERY      130
  71 #define ICMP6_MEMBERSHIP_REPORT     131
  72 #define ICMP6_MEMBERSHIP_REDUCTION  132
  73
  74 #define ICMP6_DST_UNREACH_NOROUTE     0 /* no route to destination */
  75 #define ICMP6_DST_UNREACH_ADMIN       1 /* communication with destination */
  76                                         /* administratively prohibited */
  77 #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor */
  78 #define ICMP6_DST_UNREACH_ADDR        3 /* address unreachable */
  79 #define ICMP6_DST_UNREACH_NOPORT      4 /* bad port */
  80
  81 #define ICMP6_TIME_EXCEED_TRANSIT     0 /* Hop Limit == 0 in transit */
  82 #define ICMP6_TIME_EXCEED_REASSEMBLY  1 /* Reassembly time out */
  83
  84 #define ICMP6_PARAMPROB_HEADER        0 /* erroneous header field */
  85 #define ICMP6_PARAMPROB_NEXTHEADER    1 /* unrecognized Next Header */
  86 #define ICMP6_PARAMPROB_OPTION        2 /* unrecognized IPv6 option */
  87
  88 #define ICMP6_FILTER_WILLPASS(type, filterp) \
  89         ((((filterp)->data[(type) >> 5]) & (1 << ((type) & 31))) == 0)
  90
  91 #define ICMP6_FILTER_WILLBLOCK(type, filterp) \
  92         ((((filterp)->data[(type) >> 5]) & (1 << ((type) & 31))) != 0)
  93
  94 #define ICMP6_FILTER_SETPASS(type, filterp) \
  95         ((((filterp)->data[(type) >> 5]) &= ~(1 << ((type) & 31))))
  96
  97 #define ICMP6_FILTER_SETBLOCK(type, filterp) \
  98         ((((filterp)->data[(type) >> 5]) |=  (1 << ((type) & 31))))
  99
 100 #define ICMP6_FILTER_SETPASSALL(filterp) \
 101         memset (filterp, 0, sizeof (struct icmp6_filter));
 102
 103 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
 104         memset (filterp, 0xFF, sizeof (struct icmp6_filter));
 105
 106 #define ND_ROUTER_SOLICIT           133
 107 #define ND_ROUTER_ADVERT            134
 108 #define ND_NEIGHBOR_SOLICIT         135
 109 #define ND_NEIGHBOR_ADVERT          136
 110 #define ND_REDIRECT                 137
 111
 112 struct nd_router_solicit      /* router solicitation */
 113   {
 114     struct icmp6_hdr  nd_rs_hdr;
 115     /* could be followed by options */
 116   };
 117
 118 #define nd_rs_type               nd_rs_hdr.icmp6_type
 119 #define nd_rs_code               nd_rs_hdr.icmp6_code
 120 #define nd_rs_cksum              nd_rs_hdr.icmp6_cksum
 121 #define nd_rs_reserved           nd_rs_hdr.icmp6_data32[0]
 122
 123 struct nd_router_advert       /* router advertisement */
 124   {
 125     struct icmp6_hdr  nd_ra_hdr;
 126     uint32_t   nd_ra_reachable;   /* reachable time */
 127     uint32_t   nd_ra_retransmit;  /* retransmit timer */
 128     /* could be followed by options */
 129   };
 130
 131 #define nd_ra_type               nd_ra_hdr.icmp6_type
 132 #define nd_ra_code               nd_ra_hdr.icmp6_code
 133 #define nd_ra_cksum              nd_ra_hdr.icmp6_cksum
 134 #define nd_ra_curhoplimit        nd_ra_hdr.icmp6_data8[0]
 135 #define nd_ra_flags_reserved     nd_ra_hdr.icmp6_data8[1]
 136 #define ND_RA_FLAG_MANAGED       0x80
 137 #define ND_RA_FLAG_OTHER         0x40
 138 #define nd_ra_router_lifetime    nd_ra_hdr.icmp6_data16[1]
 139
 140 struct nd_neighbor_solicit    /* neighbor solicitation */
 141   {
 142     struct icmp6_hdr  nd_ns_hdr;
 143     struct in6_addr   nd_ns_target; /* target address */
 144     /* could be followed by options */
 145   };
 146
 147 #define nd_ns_type               nd_ns_hdr.icmp6_type
 148 #define nd_ns_code               nd_ns_hdr.icmp6_code
 149 #define nd_ns_cksum              nd_ns_hdr.icmp6_cksum
 150 #define nd_ns_reserved           nd_ns_hdr.icmp6_data32[0]
 151
 152 struct nd_neighbor_advert     /* neighbor advertisement */
 153   {
 154     struct icmp6_hdr  nd_na_hdr;
 155     struct in6_addr   nd_na_target; /* target address */
 156     /* could be followed by options */
 157   };
 158
 159 #define nd_na_type               nd_na_hdr.icmp6_type
 160 #define nd_na_code               nd_na_hdr.icmp6_code
 161 #define nd_na_cksum              nd_na_hdr.icmp6_cksum
 162 #define nd_na_flags_reserved     nd_na_hdr.icmp6_data32[0]
 163 #if     BYTE_ORDER == BIG_ENDIAN
 164 #define ND_NA_FLAG_ROUTER        0x80000000
 165 #define ND_NA_FLAG_SOLICITED     0x40000000
 166 #define ND_NA_FLAG_OVERRIDE      0x20000000
 167 #else   /* BYTE_ORDER == LITTLE_ENDIAN */
 168 #define ND_NA_FLAG_ROUTER        0x00000080
 169 #define ND_NA_FLAG_SOLICITED     0x00000040
 170 #define ND_NA_FLAG_OVERRIDE      0x00000020
 171 #endif
 172
 173 struct nd_redirect            /* redirect */
 174   {
 175     struct icmp6_hdr  nd_rd_hdr;
 176     struct in6_addr   nd_rd_target; /* target address */
 177     struct in6_addr   nd_rd_dst;    /* destination address */
 178     /* could be followed by options */
 179   };
 180
 181 #define nd_rd_type               nd_rd_hdr.icmp6_type
 182 #define nd_rd_code               nd_rd_hdr.icmp6_code
 183 #define nd_rd_cksum              nd_rd_hdr.icmp6_cksum
 184 #define nd_rd_reserved           nd_rd_hdr.icmp6_data32[0]
 185
 186 struct nd_opt_hdr             /* Neighbor discovery option header */
 187   {
 188     uint8_t  nd_opt_type;
 189     uint8_t  nd_opt_len;        /* in units of 8 octets */
 190     /* followed by option specific data */
 191   };
 192
 193 #define  ND_OPT_SOURCE_LINKADDR       1
 194 #define  ND_OPT_TARGET_LINKADDR       2
 195 #define  ND_OPT_PREFIX_INFORMATION    3
 196 #define  ND_OPT_REDIRECTED_HEADER     4
 197 #define  ND_OPT_MTU                   5
 198
 199 struct nd_opt_prefix_info     /* prefix information */
 200   {
 201     uint8_t   nd_opt_pi_type;
 202     uint8_t   nd_opt_pi_len;
 203     uint8_t   nd_opt_pi_prefix_len;
 204     uint8_t   nd_opt_pi_flags_reserved;
 205     uint32_t  nd_opt_pi_valid_time;
 206     uint32_t  nd_opt_pi_preferred_time;
 207     uint32_t  nd_opt_pi_reserved2;
 208     struct in6_addr  nd_opt_pi_prefix;
 209   };
 210
 211 #define ND_OPT_PI_FLAG_ONLINK        0x80
 212 #define ND_OPT_PI_FLAG_AUTO          0x40
 213
 214 struct nd_opt_rd_hdr          /* redirected header */
 215   {
 216     uint8_t   nd_opt_rh_type;
 217     uint8_t   nd_opt_rh_len;
 218     uint16_t  nd_opt_rh_reserved1;
 219     uint32_t  nd_opt_rh_reserved2;
 220     /* followed by IP header and data */
 221   };
 222
 223 struct nd_opt_mtu             /* MTU option */
 224   {
 225     uint8_t   nd_opt_mtu_type;
 226     uint8_t   nd_opt_mtu_len;
 227     uint16_t  nd_opt_mtu_reserved;
 228     uint32_t  nd_opt_mtu_mtu;
 229   };
 230
 231
 232 #endif /* netinet/icmpv6.h */