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 */ 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. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)ip.h 8.1 (Berkeley) 6/10/93 63 */ 64 65 #ifndef _NETINET_IP6_H_ 66 #define _NETINET_IP6_H_ 67 68 /* 69 * Definition for internet protocol version 6. 70 * RFC 2460 71 */ 72 73 struct ip6_hdr { 74 union { 75 struct ip6_hdrctl { 76 u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */ 77 u_int16_t ip6_un1_plen; /* payload length */ 78 u_int8_t ip6_un1_nxt; /* next header */ 79 u_int8_t ip6_un1_hlim; /* hop limit */ 80 } ip6_un1; 81 u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ 82 } ip6_ctlun; 83 struct in6_addr ip6_src; /* source address */ 84 struct in6_addr ip6_dst; /* destination address */ 85 } UNALIGNED; 86 87 #define ip6_vfc ip6_ctlun.ip6_un2_vfc 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 ((u_int32_t)htonl(0x0fffffff)) /* flow info (28 bits) */ 96 #define IPV6_FLOWLABEL_MASK ((u_int32_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 u_int8_t ip6e_nxt; 109 u_int8_t ip6e_len; 110 } UNALIGNED; 111 112 /* Hop-by-Hop options header */ 113 struct ip6_hbh { 114 u_int8_t ip6h_nxt; /* next header */ 115 u_int8_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 u_int8_t ip6d_nxt; /* next header */ 122 u_int8_t ip6d_len; /* length in units of 8 octets */ 123 /* followed by options */ 124 } UNALIGNED; 125 126 /* Option types and related macros */ 127 #define IP6OPT_PAD1 0x00 /* 00 0 00000 */ 128 #define IP6OPT_PADN 0x01 /* 00 0 00001 */ 129 #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */ 130 #define IP6OPT_JUMBO_LEN 6 131 #define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 */ 132 133 #define IP6OPT_RTALERT_LEN 4 134 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */ 135 #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */ 136 #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */ 137 #define IP6OPT_MINLEN 2 138 139 #define IP6OPT_BINDING_UPDATE 0xc6 /* 11 0 00110 */ 140 #define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */ 141 #define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */ 142 #define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */ 143 #define IP6OPT_EID 0x8a /* 10 0 01010 */ 144 145 #define IP6OPT_TYPE(o) ((o) & 0xC0) 146 #define IP6OPT_TYPE_SKIP 0x00 147 #define IP6OPT_TYPE_DISCARD 0x40 148 #define IP6OPT_TYPE_FORCEICMP 0x80 149 #define IP6OPT_TYPE_ICMP 0xC0 150 151 #define IP6OPT_MUTABLE 0x20 152 153 /* Routing header */ 154 struct ip6_rthdr { 155 u_int8_t ip6r_nxt; /* next header */ 156 u_int8_t ip6r_len; /* length in units of 8 octets */ 157 u_int8_t ip6r_type; /* routing type */ 158 u_int8_t ip6r_segleft; /* segments left */ 159 /* followed by routing type specific data */ 160 } UNALIGNED; 161 162 /* Type 0 Routing header */ 163 struct ip6_rthdr0 { 164 u_int8_t ip6r0_nxt; /* next header */ 165 u_int8_t ip6r0_len; /* length in units of 8 octets */ 166 u_int8_t ip6r0_type; /* always zero */ 167 u_int8_t ip6r0_segleft; /* segments left */ 168 u_int8_t ip6r0_reserved; /* reserved field */ 169 u_int8_t ip6r0_slmap[3]; /* strict/loose bit map */ 170 struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */ 171 } UNALIGNED; 172 173 /* Fragment header */ 174 struct ip6_frag { 175 u_int8_t ip6f_nxt; /* next header */ 176 u_int8_t ip6f_reserved; /* reserved field */ 177 u_int16_t ip6f_offlg; /* offset, reserved, and flag */ 178 u_int32_t ip6f_ident; /* identification */ 179 } UNALIGNED; 180 181 #define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */ 182 #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ 183 #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ 184 185 /* in print-ip6.c */ 186 extern int nextproto6_cksum(const struct ip6_hdr *, const u_int8_t *, u_int, u_int); 187 188 #endif /* not _NETINET_IP6_H_ */ 189