JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 1 | /* @(#) $Header: /tcpdump/master/tcpdump/ip6.h,v 1.8 2007-08-29 02:31:44 mcr Exp $ (LBL) */ |
| 2 | /* NetBSD: ip6.h,v 1.9 2000/07/13 05:34:21 itojun Exp */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 3 | /* $KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $ */ |
| 4 | |
| 5 | /* |
| 6 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the name of the project nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * Copyright (c) 1982, 1986, 1993 |
| 36 | * The Regents of the University of California. All rights reserved. |
| 37 | * |
| 38 | * Redistribution and use in source and binary forms, with or without |
| 39 | * modification, are permitted provided that the following conditions |
| 40 | * are met: |
| 41 | * 1. Redistributions of source code must retain the above copyright |
| 42 | * notice, this list of conditions and the following disclaimer. |
| 43 | * 2. Redistributions in binary form must reproduce the above copyright |
| 44 | * notice, this list of conditions and the following disclaimer in the |
| 45 | * documentation and/or other materials provided with the distribution. |
| 46 | * 3. All advertising materials mentioning features or use of this software |
| 47 | * must display the following acknowledgement: |
| 48 | * This product includes software developed by the University of |
| 49 | * California, Berkeley and its contributors. |
| 50 | * 4. Neither the name of the University nor the names of its contributors |
| 51 | * may be used to endorse or promote products derived from this software |
| 52 | * without specific prior written permission. |
| 53 | * |
| 54 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 55 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 56 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 57 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 58 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 59 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 60 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 61 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 62 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 63 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 64 | * SUCH DAMAGE. |
| 65 | * |
| 66 | * @(#)ip.h 8.1 (Berkeley) 6/10/93 |
| 67 | */ |
| 68 | |
| 69 | #ifndef _NETINET_IP6_H_ |
| 70 | #define _NETINET_IP6_H_ |
| 71 | |
| 72 | /* |
| 73 | * Definition for internet protocol version 6. |
| 74 | * RFC 2460 |
| 75 | */ |
| 76 | |
| 77 | struct ip6_hdr { |
| 78 | union { |
| 79 | struct ip6_hdrctl { |
| 80 | u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */ |
| 81 | u_int16_t ip6_un1_plen; /* payload length */ |
| 82 | u_int8_t ip6_un1_nxt; /* next header */ |
| 83 | u_int8_t ip6_un1_hlim; /* hop limit */ |
| 84 | } ip6_un1; |
| 85 | u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ |
| 86 | } ip6_ctlun; |
| 87 | struct in6_addr ip6_src; /* source address */ |
| 88 | struct in6_addr ip6_dst; /* destination address */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 89 | } UNALIGNED; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 90 | |
| 91 | #define ip6_vfc ip6_ctlun.ip6_un2_vfc |
| 92 | #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow |
| 93 | #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen |
| 94 | #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt |
| 95 | #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim |
| 96 | #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim |
| 97 | |
| 98 | /* in network endian */ |
| 99 | #define IPV6_FLOWINFO_MASK ((u_int32_t)htonl(0x0fffffff)) /* flow info (28 bits) */ |
| 100 | #define IPV6_FLOWLABEL_MASK ((u_int32_t)htonl(0x000fffff)) /* flow label (20 bits) */ |
| 101 | #if 1 |
| 102 | /* ECN bits proposed by Sally Floyd */ |
| 103 | #define IP6TOS_CE 0x01 /* congestion experienced */ |
| 104 | #define IP6TOS_ECT 0x02 /* ECN-capable transport */ |
| 105 | #endif |
| 106 | |
| 107 | /* |
| 108 | * Extension Headers |
| 109 | */ |
| 110 | |
| 111 | struct ip6_ext { |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 112 | u_int8_t ip6e_nxt; |
| 113 | u_int8_t ip6e_len; |
| 114 | } UNALIGNED; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 115 | |
| 116 | /* Hop-by-Hop options header */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 117 | struct ip6_hbh { |
| 118 | u_int8_t ip6h_nxt; /* next header */ |
| 119 | u_int8_t ip6h_len; /* length in units of 8 octets */ |
| 120 | /* followed by options */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 121 | } UNALIGNED; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 122 | |
| 123 | /* Destination options header */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 124 | struct ip6_dest { |
| 125 | u_int8_t ip6d_nxt; /* next header */ |
| 126 | u_int8_t ip6d_len; /* length in units of 8 octets */ |
| 127 | /* followed by options */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 128 | } UNALIGNED; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 129 | |
| 130 | /* Option types and related macros */ |
| 131 | #define IP6OPT_PAD1 0x00 /* 00 0 00000 */ |
| 132 | #define IP6OPT_PADN 0x01 /* 00 0 00001 */ |
| 133 | #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */ |
| 134 | #define IP6OPT_JUMBO_LEN 6 |
| 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_BINDING_UPDATE 0xc6 /* 11 0 00110 */ |
| 144 | #define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */ |
| 145 | #define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */ |
| 146 | #define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */ |
| 147 | #define IP6OPT_EID 0x8a /* 10 0 01010 */ |
| 148 | |
| 149 | #define IP6OPT_TYPE(o) ((o) & 0xC0) |
| 150 | #define IP6OPT_TYPE_SKIP 0x00 |
| 151 | #define IP6OPT_TYPE_DISCARD 0x40 |
| 152 | #define IP6OPT_TYPE_FORCEICMP 0x80 |
| 153 | #define IP6OPT_TYPE_ICMP 0xC0 |
| 154 | |
| 155 | #define IP6OPT_MUTABLE 0x20 |
| 156 | |
| 157 | /* Routing header */ |
| 158 | struct ip6_rthdr { |
| 159 | u_int8_t ip6r_nxt; /* next header */ |
| 160 | u_int8_t ip6r_len; /* length in units of 8 octets */ |
| 161 | u_int8_t ip6r_type; /* routing type */ |
| 162 | u_int8_t ip6r_segleft; /* segments left */ |
| 163 | /* followed by routing type specific data */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 164 | } UNALIGNED; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 165 | |
| 166 | /* Type 0 Routing header */ |
| 167 | struct ip6_rthdr0 { |
| 168 | u_int8_t ip6r0_nxt; /* next header */ |
| 169 | u_int8_t ip6r0_len; /* length in units of 8 octets */ |
| 170 | u_int8_t ip6r0_type; /* always zero */ |
| 171 | u_int8_t ip6r0_segleft; /* segments left */ |
| 172 | u_int8_t ip6r0_reserved; /* reserved field */ |
| 173 | u_int8_t ip6r0_slmap[3]; /* strict/loose bit map */ |
| 174 | struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 175 | } UNALIGNED; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 176 | |
| 177 | /* Fragment header */ |
| 178 | struct ip6_frag { |
| 179 | u_int8_t ip6f_nxt; /* next header */ |
| 180 | u_int8_t ip6f_reserved; /* reserved field */ |
| 181 | u_int16_t ip6f_offlg; /* offset, reserved, and flag */ |
| 182 | u_int32_t ip6f_ident; /* identification */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 183 | } UNALIGNED; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 184 | |
| 185 | #define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */ |
| 186 | #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ |
| 187 | #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ |
| 188 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 189 | /* in print-ip6.c */ |
| 190 | extern int nextproto6_cksum(const struct ip6_hdr *, const u_int8_t *, u_int, u_int); |
| 191 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 192 | #endif /* not _NETINET_IP6_H_ */ |