epan/dissectors/packet-ipv6.h

   1 /* packet-ipv6.h
   2  * Definitions for IPv6 packet disassembly
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  *
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #ifndef __PACKET_IPV6_H_DEFINED__
  27 #define __PACKET_IPV6_H_DEFINED__
  28
  29 #include <epan/ipv6-utils.h>
  30
  31 /* this definition makes trouble with Microsoft Platform SDK: ws2tcpip.h and is used nowhere */
  32 /*#define INET6_ADDRSTRLEN      46*/
  33
  34 /*
  35  * Definition for internet protocol version 6.
  36  * RFC 2460
  37  */
  38 struct ip6_hdr {
  39         union {
  40                 struct ip6_hdrctl {
  41                         guint32 ip6_un1_flow;   /* version, class, flow */
  42                         guint16 ip6_un1_plen;   /* payload length */
  43                         guint8  ip6_un1_nxt;    /* next header */
  44                         guint8  ip6_un1_hlim;   /* hop limit */
  45                 } ip6_un1;
  46                 guint8 ip6_un2_vfc;     /* 4 bits version, 4 bits class */
  47         } ip6_ctlun;
  48         struct e_in6_addr ip6_src;      /* source address */
  49         struct e_in6_addr ip6_dst;      /* destination address */
  50 };
  51
  52 #define ip6_vfc         ip6_ctlun.ip6_un2_vfc
  53 #define ip6_flow        ip6_ctlun.ip6_un1.ip6_un1_flow
  54 #define ip6_plen        ip6_ctlun.ip6_un1.ip6_un1_plen
  55 #define ip6_nxt         ip6_ctlun.ip6_un1.ip6_un1_nxt
  56 #define ip6_hlim        ip6_ctlun.ip6_un1.ip6_un1_hlim
  57 #define ip6_hops        ip6_ctlun.ip6_un1.ip6_un1_hlim
  58
  59 /* Offsets of fields within an IPv6 header. */
  60 #define IP6H_CTL                0
  61 #define IP6H_CTL_FLOW   0
  62 #define IP6H_CTL_PLEN   4
  63 #define IP6H_CTL_NXT    6
  64 #define IP6H_CTL_HLIM   7
  65 #define IP6H_CTL_VFC    0
  66 #define IP6H_SRC                8
  67 #define IP6H_DST                24
  68
  69 #define IPV6_FLOWINFO_MASK      0x0fffffff      /* flow info (28 bits) */
  70 #define IPV6_FLOWLABEL_MASK     0x000fffff      /* flow label (20 bits) */
  71
  72 /*
  73  * Extension Headers
  74  */
  75
  76 struct  ip6_ext {
  77         guchar  ip6e_nxt;
  78         guchar  ip6e_len;
  79 };
  80
  81 /* Routing header */
  82 struct ip6_rthdr {
  83         guint8  ip6r_nxt;       /* next header */
  84         guint8  ip6r_len;       /* length in units of 8 octets */
  85         guint8  ip6r_type;      /* routing type */
  86         guint8  ip6r_segleft;   /* segments left */
  87         /* followed by routing type specific data */
  88 };
  89
  90 /* Type 0 Routing header */
  91 struct ip6_rthdr0 {
  92         guint8  ip6r0_nxt;              /* next header */
  93         guint8  ip6r0_len;              /* length in units of 8 octets */
  94         guint8  ip6r0_type;             /* always zero */
  95         guint8  ip6r0_segleft;  /* segments left */
  96         guint8  ip6r0_reserved; /* reserved field */
  97         guint8  ip6r0_slmap[3]; /* strict/loose bit map */
  98         struct e_in6_addr  ip6r0_addr[1];       /* up to 23 addresses */
  99 };
 100
 101 /* Fragment header */
 102 struct ip6_frag {
 103         guint8  ip6f_nxt;               /* next header */
 104         guint8  ip6f_reserved;  /* reserved field */
 105         guint16 ip6f_offlg;             /* offset, reserved, and flag */
 106         guint32 ip6f_ident;             /* identification */
 107 };
 108
 109 /* SHIM6 control message types */
 110 #define SHIM6_TYPE_I1                   0x01    /* 0 000 0001 */
 111 #define SHIM6_TYPE_R1                   0x02    /* 0 000 0010 */
 112 #define SHIM6_TYPE_I2                   0x03    /* 0 000 0011 */
 113 #define SHIM6_TYPE_R2                   0x04    /* 0 000 0100 */
 114 #define SHIM6_TYPE_R1BIS                0x05    /* 0 000 0101 */
 115 #define SHIM6_TYPE_I2BIS                0x06    /* 0 000 0110 */
 116 #define SHIM6_TYPE_UPD_REQ              0x40    /* 0 100 0000 = 64 */
 117 #define SHIM6_TYPE_UPD_ACK              0x41    /* 0 100 0001 = 65 */
 118 #define SHIM6_TYPE_KEEPALIVE    0x42    /* 0 100 0010 = 66 */
 119 #define SHIM6_TYPE_PROBE                0x43    /* 0 100 0011 = 67 */
 120
 121 /* SHIM6 Options */
 122 #define SHIM6_OPT_RESPVAL       0x01    /* 0 000 0001 */
 123 #define SHIM6_OPT_LOCLIST       0x02    /* 0 000 0010 */
 124 #define SHIM6_OPT_LOCPREF       0x03    /* 0 000 0011 */
 125 #define SHIM6_OPT_CGAPDM        0x04    /* 0 000 0100 */
 126 #define SHIM6_OPT_CGASIG        0x05    /* 0 000 0101 */
 127 #define SHIM6_OPT_ULIDPAIR      0x06    /* 0 000 0110 */
 128 #define SHIM6_OPT_FII           0x07    /* 0 000 0111 */
 129
 130 /* SHIM6 Bitmasks */
 131 #define SHIM6_BITMASK_P                 0x80    /* 1 000 0000 */
 132 #define SHIM6_BITMASK_TYPE              0x7F    /* 0 111 1111 */
 133 #define SHIM6_BITMASK_PROTOCOL  0x01    /* 0 000 0001 */
 134 #define SHIM6_BITMASK_SPECIFIC  0xFE    /* 1 111 1110 */
 135 #define SHIM6_BITMASK_R                 0x80    /* 1 000 0000 */
 136 #define SHIM6_BITMASK_CT                0x7F    /* 0 111 1111 */
 137 #define SHIM6_BITMASK_OPT_TYPE  0xFFFE  /* 1 111 1111    1 111 1110 */
 138 #define SHIM6_BITMASK_CRITICAL  0x01    /* 0 000 0001 */
 139 #define SHIM6_BITMASK_PRECVD    0xF0    /* 1 111 0000 */
 140 #define SHIM6_BITMASK_PSENT             0x0F    /* 0 000 1111 */
 141 #define SHIM6_BITMASK_STA               0xC0    /* 1 100 0000 */
 142
 143 /* SHIM6 Verification Methods */
 144 #define SHIM6_VERIF_HBA                 0x01    /* 0 000 0001 */
 145 #define SHIM6_VERIF_CGA                 0x02    /* 0 000 0010 */
 146
 147 /* SHIM6 Flags */
 148 #define SHIM6_FLAG_BROKEN               0x01    /* 0 000 0001 */
 149 #define SHIM6_FLAG_TEMPORARY    0x02    /* 0 000 0010 */
 150
 151 /* SHIM6 REAP States */
 152 #define SHIM6_REAP_OPERATIONAL  0x00    /* 0 000 0000 */
 153 #define SHIM6_REAP_EXPLORING    0x01    /* 0 000 0001 */
 154 #define SHIM6_REAP_INBOUNDOK    0x02    /* 0 000 0010 */
 155
 156 /* SHIM6 header */
 157 struct ip6_shim {
 158         guint8  ip6s_nxt;               /* next header */
 159         guint8  ip6s_len;               /* header extension length */
 160         guint8  ip6s_p;                 /* P field and first 7 bits of remainder */
 161         /* followed by shim6 specific data*/
 162 };
 163
 164 #define IP6F_OFF_MASK           0xfff8  /* mask out offset from _offlg */
 165 #define IP6F_OFF_SHIFT          3       /* right-shift offset by this many bits */
 166 #define IP6F_RESERVED_MASK      0x0006  /* reserved bits in ip6f_offlg */
 167 #define IP6F_MORE_FRAG          0x0001  /* more-fragments flag */
 168
 169 #ifdef __cplusplus
 170 extern "C" {
 171 #endif /* __cplusplus */
 172
 173 void capture_ipv6(const guchar *, int, int, packet_counts *);
 174
 175 #ifdef __cplusplus
 176 }
 177 #endif /* __cplusplus */
 178
 179 #endif /* __PACKET_IPV6_H_DEFINED__ */