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. 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 77struct 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 */ 89} UNALIGNED; 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 111struct ip6_ext { 112 u_int8_t ip6e_nxt; 113 u_int8_t ip6e_len; 114} UNALIGNED; 115 116/* Hop-by-Hop options header */ 117struct 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 */ 121} UNALIGNED; 122 123/* Destination options header */ 124struct 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 */ 128} UNALIGNED; 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 */ 158struct 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 */ 164} UNALIGNED; 165 166/* Type 0 Routing header */ 167struct 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 */ 175} UNALIGNED; 176 177/* Fragment header */ 178struct 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 */ 183} UNALIGNED; 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 */ 188 189/* in print-ip6.c */ 190extern int nextproto6_cksum(const struct ip6_hdr *, const u_int8_t *, u_int, u_int); 191 192#endif /* not _NETINET_IP6_H_ */ 193