external/bsd/tcpdump/dist/ip6.h

   1 /*      NetBSD: ip6.h,v 1.9 2000/07/13 05:34:21 itojun Exp      */
   2 /*      $KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $     */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1982, 1986, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)ip.h        8.1 (Berkeley) 6/10/93
  62  */
  63
  64 #ifndef _NETINET_IP6_H_
  65 #define _NETINET_IP6_H_
  66
  67 /*
  68  * Definition for internet protocol version 6.
  69  * RFC 2460
  70  */
  71
  72 struct ip6_hdr {
  73         union {
  74                 struct ip6_hdrctl {
  75                         uint32_t ip6_un1_flow;  /* 20 bits of flow-ID */
  76                         uint16_t ip6_un1_plen;  /* payload length */
  77                         uint8_t  ip6_un1_nxt;   /* next header */
  78                         uint8_t  ip6_un1_hlim;  /* hop limit */
  79                 } ip6_un1;
  80                 uint8_t ip6_un2_vfc;    /* 4 bits version, top 4 bits class */
  81         } ip6_ctlun;
  82         struct in6_addr ip6_src;        /* source address */
  83         struct in6_addr ip6_dst;        /* destination address */
  84 } UNALIGNED;
  85
  86 #define ip6_vfc         ip6_ctlun.ip6_un2_vfc
  87 #define IP6_VERSION(ip6_hdr)    (((ip6_hdr)->ip6_vfc & 0xf0) >> 4)
  88 #define ip6_flow        ip6_ctlun.ip6_un1.ip6_un1_flow
  89 #define ip6_plen        ip6_ctlun.ip6_un1.ip6_un1_plen
  90 #define ip6_nxt         ip6_ctlun.ip6_un1.ip6_un1_nxt
  91 #define ip6_hlim        ip6_ctlun.ip6_un1.ip6_un1_hlim
  92 #define ip6_hops        ip6_ctlun.ip6_un1.ip6_un1_hlim
  93
  94 /* in network endian */
  95 #define IPV6_FLOWINFO_MASK      ((uint32_t)htonl(0x0fffffff))   /* flow info (28 bits) */
  96 #define IPV6_FLOWLABEL_MASK     ((uint32_t)htonl(0x000fffff))   /* flow label (20 bits) */
  97 #if 1
  98 /* ECN bits proposed by Sally Floyd */
  99 #define IP6TOS_CE               0x01    /* congestion experienced */
 100 #define IP6TOS_ECT              0x02    /* ECN-capable transport */
 101 #endif
 102
 103 /*
 104  * Extension Headers
 105  */
 106
 107 struct  ip6_ext {
 108         uint8_t ip6e_nxt;
 109         uint8_t ip6e_len;
 110 } UNALIGNED;
 111
 112 /* Hop-by-Hop options header */
 113 struct ip6_hbh {
 114         uint8_t ip6h_nxt;       /* next header */
 115         uint8_t ip6h_len;       /* length in units of 8 octets */
 116         /* followed by options */
 117 } UNALIGNED;
 118
 119 /* Destination options header */
 120 struct ip6_dest {
 121         uint8_t ip6d_nxt;       /* next header */
 122         uint8_t ip6d_len;       /* length in units of 8 octets */
 123         /* followed by options */
 124 } UNALIGNED;
 125
 126 /* http://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml */
 127
 128 /* Option types and related macros */
 129 #define IP6OPT_PAD1             0x00    /* 00 0 00000 */
 130 #define IP6OPT_PADN             0x01    /* 00 0 00001 */
 131 #define IP6OPT_JUMBO            0xC2    /* 11 0 00010 = 194 */
 132 #define IP6OPT_JUMBO_LEN        6
 133 #define IP6OPT_RPL              0x63    /* 01 1 00011 */
 134 #define IP6OPT_TUN_ENC_LIMIT    0x04    /* 00 0 00100 */
 135 #define IP6OPT_ROUTER_ALERT     0x05    /* 00 0 00101 */
 136
 137 #define IP6OPT_RTALERT_LEN      4
 138 #define IP6OPT_RTALERT_MLD      0       /* Datagram contains an MLD message */
 139 #define IP6OPT_RTALERT_RSVP     1       /* Datagram contains an RSVP message */
 140 #define IP6OPT_RTALERT_ACTNET   2       /* contains an Active Networks msg */
 141 #define IP6OPT_MINLEN           2
 142
 143 #define IP6OPT_QUICK_START      0x26    /* 00 1 00110 */
 144 #define IP6OPT_CALIPSO          0x07    /* 00 0 00111 */
 145 #define IP6OPT_SMF_DPD          0x08    /* 00 0 01000 */
 146 #define IP6OPT_HOME_ADDRESS     0xc9    /* 11 0 01001 */
 147 #define IP6OPT_HOMEADDR_MINLEN  18
 148 #define IP6OPT_EID              0x8a    /* 10 0 01010 */
 149 #define IP6OPT_ILNP_NOTICE      0x8b    /* 10 0 01011 */
 150 #define IP6OPT_LINE_ID          0x8c    /* 10 0 01100 */
 151 #define IP6OPT_MPL              0x6d    /* 01 1 01101 */
 152 #define IP6OPT_IP_DFF           0xee    /* 11 1 01110 */
 153
 154 #define IP6OPT_TYPE(o)          ((o) & 0xC0)
 155 #define IP6OPT_TYPE_SKIP        0x00
 156 #define IP6OPT_TYPE_DISCARD     0x40
 157 #define IP6OPT_TYPE_FORCEICMP   0x80
 158 #define IP6OPT_TYPE_ICMP        0xC0
 159
 160 #define IP6OPT_MUTABLE          0x20
 161
 162 /* Routing header */
 163 struct ip6_rthdr {
 164         uint8_t  ip6r_nxt;      /* next header */
 165         uint8_t  ip6r_len;      /* length in units of 8 octets */
 166         uint8_t  ip6r_type;     /* routing type */
 167         uint8_t  ip6r_segleft;  /* segments left */
 168         /* followed by routing type specific data */
 169 } UNALIGNED;
 170
 171 /* Type 0 Routing header */
 172 struct ip6_rthdr0 {
 173         uint8_t  ip6r0_nxt;             /* next header */
 174         uint8_t  ip6r0_len;             /* length in units of 8 octets */
 175         uint8_t  ip6r0_type;            /* always zero */
 176         uint8_t  ip6r0_segleft; /* segments left */
 177         uint8_t  ip6r0_reserved;        /* reserved field */
 178         uint8_t  ip6r0_slmap[3];        /* strict/loose bit map */
 179         struct in6_addr ip6r0_addr[1];  /* up to 23 addresses */
 180 } UNALIGNED;
 181
 182 /* Fragment header */
 183 struct ip6_frag {
 184         uint8_t  ip6f_nxt;              /* next header */
 185         uint8_t  ip6f_reserved; /* reserved field */
 186         uint16_t ip6f_offlg;            /* offset, reserved, and flag */
 187         uint32_t ip6f_ident;            /* identification */
 188 } UNALIGNED;
 189
 190 #define IP6F_OFF_MASK           0xfff8  /* mask out offset from ip6f_offlg */
 191 #define IP6F_RESERVED_MASK      0x0006  /* reserved bits in ip6f_offlg */
 192 #define IP6F_MORE_FRAG          0x0001  /* more-fragments flag */
 193
 194 /* in print-ip6.c */
 195 extern int nextproto6_cksum(const struct ip6_hdr *, const uint8_t *, u_int, u_int, u_int);
 196
 197 #endif /* not _NETINET_IP6_H_ */