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. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)ip.h 8.1 (Berkeley) 6/10/93 66 */ 67 68#ifndef _NETINET_IP6_H_ 69#define _NETINET_IP6_H_ 70 71/* 72 * Definition for internet protocol version 6. 73 * RFC 2460 74 */ 75 76struct ip6_hdr { 77 union { 78 struct ip6_hdrctl { 79 uint32_t ip6_un1_flow; /* 20 bits of flow-ID */ 80 uint16_t ip6_un1_plen; /* payload length */ 81 uint8_t ip6_un1_nxt; /* next header */ 82 uint8_t ip6_un1_hlim; /* hop limit */ 83 } ip6_un1; 84 uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ 85 } ip6_ctlun; 86 struct in6_addr ip6_src; /* source address */ 87 struct in6_addr ip6_dst; /* destination address */ 88} UNALIGNED; 89 90#define ip6_vfc ip6_ctlun.ip6_un2_vfc 91#define IP6_VERSION(ip6_hdr) (((ip6_hdr)->ip6_vfc & 0xf0) >> 4) 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 ((uint32_t)htonl(0x0fffffff)) /* flow info (28 bits) */ 100#define IPV6_FLOWLABEL_MASK ((uint32_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 uint8_t ip6e_nxt; 113 uint8_t ip6e_len; 114} UNALIGNED; 115 116/* Hop-by-Hop options header */ 117struct ip6_hbh { 118 uint8_t ip6h_nxt; /* next header */ 119 uint8_t ip6h_len; /* length in units of 8 octets */ 120 /* followed by options */ 121} UNALIGNED; 122 123/* Destination options header */ 124struct ip6_dest { 125 uint8_t ip6d_nxt; /* next header */ 126 uint8_t ip6d_len; /* length in units of 8 octets */ 127 /* followed by options */ 128} UNALIGNED; 129 130/* http://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml */ 131 132/* Option types and related macros */ 133#define IP6OPT_PAD1 0x00 /* 00 0 00000 */ 134#define IP6OPT_PADN 0x01 /* 00 0 00001 */ 135#define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */ 136#define IP6OPT_JUMBO_LEN 6 137#define IP6OPT_RPL 0x63 /* 01 1 00011 */ 138#define IP6OPT_TUN_ENC_LIMIT 0x04 /* 00 0 00100 */ 139#define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 */ 140 141#define IP6OPT_RTALERT_LEN 4 142#define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */ 143#define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */ 144#define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */ 145#define IP6OPT_MINLEN 2 146 147#define IP6OPT_QUICK_START 0x26 /* 00 1 00110 */ 148#define IP6OPT_CALIPSO 0x07 /* 00 0 00111 */ 149#define IP6OPT_SMF_DPD 0x08 /* 00 0 01000 */ 150#define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */ 151#define IP6OPT_HOMEADDR_MINLEN 18 152#define IP6OPT_EID 0x8a /* 10 0 01010 */ 153#define IP6OPT_ILNP_NOTICE 0x8b /* 10 0 01011 */ 154#define IP6OPT_LINE_ID 0x8c /* 10 0 01100 */ 155#define IP6OPT_MPL 0x6d /* 01 1 01101 */ 156#define IP6OPT_IP_DFF 0xee /* 11 1 01110 */ 157 158#define IP6OPT_TYPE(o) ((o) & 0xC0) 159#define IP6OPT_TYPE_SKIP 0x00 160#define IP6OPT_TYPE_DISCARD 0x40 161#define IP6OPT_TYPE_FORCEICMP 0x80 162#define IP6OPT_TYPE_ICMP 0xC0 163 164#define IP6OPT_MUTABLE 0x20 165 166/* Routing header */ 167struct ip6_rthdr { 168 uint8_t ip6r_nxt; /* next header */ 169 uint8_t ip6r_len; /* length in units of 8 octets */ 170 uint8_t ip6r_type; /* routing type */ 171 uint8_t ip6r_segleft; /* segments left */ 172 /* followed by routing type specific data */ 173} UNALIGNED; 174 175#define IPV6_RTHDR_TYPE_0 0 176#define IPV6_RTHDR_TYPE_2 2 177 178/* Type 0 Routing header */ 179/* Also used for Type 2 */ 180struct ip6_rthdr0 { 181 nd_uint8_t ip6r0_nxt; /* next header */ 182 nd_uint8_t ip6r0_len; /* length in units of 8 octets */ 183 nd_uint8_t ip6r0_type; /* always zero */ 184 nd_uint8_t ip6r0_segleft; /* segments left */ 185 nd_uint32_t ip6r0_reserved; /* reserved field */ 186 struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */ 187}; 188 189/* Fragment header */ 190struct ip6_frag { 191 uint8_t ip6f_nxt; /* next header */ 192 uint8_t ip6f_reserved; /* reserved field */ 193 uint16_t ip6f_offlg; /* offset, reserved, and flag */ 194 uint32_t ip6f_ident; /* identification */ 195} UNALIGNED; 196 197#define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */ 198#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ 199#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ 200 201#endif /* not _NETINET_IP6_H_ */ 202