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. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)ip.h 8.1 (Berkeley) 6/10/93 62 */ 63 64 #ifndef _NETINET_IP6_H_ 65 #define _NETINET_IP6_H_ 66 67 /* 68 * Definition for internet protocol version 6. 69 * RFC 2460 70 */ 71 72 struct ip6_hdr { 73 union { 74 struct ip6_hdrctl { 75 uint32_t ip6_un1_flow; /* 20 bits of flow-ID */ 76 uint16_t ip6_un1_plen; /* payload length */ 77 uint8_t ip6_un1_nxt; /* next header */ 78 uint8_t ip6_un1_hlim; /* hop limit */ 79 } ip6_un1; 80 uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ 81 } ip6_ctlun; 82 struct in6_addr ip6_src; /* source address */ 83 struct in6_addr ip6_dst; /* destination address */ 84 } UNALIGNED; 85 86 #define ip6_vfc ip6_ctlun.ip6_un2_vfc 87 #define IP6_VERSION(ip6_hdr) (((ip6_hdr)->ip6_vfc & 0xf0) >> 4) 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 ((uint32_t)htonl(0x0fffffff)) /* flow info (28 bits) */ 96 #define IPV6_FLOWLABEL_MASK ((uint32_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 uint8_t ip6e_nxt; 109 uint8_t ip6e_len; 110 } UNALIGNED; 111 112 /* Hop-by-Hop options header */ 113 struct ip6_hbh { 114 uint8_t ip6h_nxt; /* next header */ 115 uint8_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 uint8_t ip6d_nxt; /* next header */ 122 uint8_t ip6d_len; /* length in units of 8 octets */ 123 /* followed by options */ 124 } UNALIGNED; 125 126 /* http://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml */ 127 128 /* Option types and related macros */ 129 #define IP6OPT_PAD1 0x00 /* 00 0 00000 */ 130 #define IP6OPT_PADN 0x01 /* 00 0 00001 */ 131 #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */ 132 #define IP6OPT_JUMBO_LEN 6 133 #define IP6OPT_RPL 0x63 /* 01 1 00011 */ 134 #define IP6OPT_TUN_ENC_LIMIT 0x04 /* 00 0 00100 */ 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_QUICK_START 0x26 /* 00 1 00110 */ 144 #define IP6OPT_CALIPSO 0x07 /* 00 0 00111 */ 145 #define IP6OPT_SMF_DPD 0x08 /* 00 0 01000 */ 146 #define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */ 147 #define IP6OPT_HOMEADDR_MINLEN 18 148 #define IP6OPT_EID 0x8a /* 10 0 01010 */ 149 #define IP6OPT_ILNP_NOTICE 0x8b /* 10 0 01011 */ 150 #define IP6OPT_LINE_ID 0x8c /* 10 0 01100 */ 151 #define IP6OPT_MPL 0x6d /* 01 1 01101 */ 152 #define IP6OPT_IP_DFF 0xee /* 11 1 01110 */ 153 154 #define IP6OPT_TYPE(o) ((o) & 0xC0) 155 #define IP6OPT_TYPE_SKIP 0x00 156 #define IP6OPT_TYPE_DISCARD 0x40 157 #define IP6OPT_TYPE_FORCEICMP 0x80 158 #define IP6OPT_TYPE_ICMP 0xC0 159 160 #define IP6OPT_MUTABLE 0x20 161 162 /* Routing header */ 163 struct ip6_rthdr { 164 uint8_t ip6r_nxt; /* next header */ 165 uint8_t ip6r_len; /* length in units of 8 octets */ 166 uint8_t ip6r_type; /* routing type */ 167 uint8_t ip6r_segleft; /* segments left */ 168 /* followed by routing type specific data */ 169 } UNALIGNED; 170 171 /* Type 0 Routing header */ 172 struct ip6_rthdr0 { 173 uint8_t ip6r0_nxt; /* next header */ 174 uint8_t ip6r0_len; /* length in units of 8 octets */ 175 uint8_t ip6r0_type; /* always zero */ 176 uint8_t ip6r0_segleft; /* segments left */ 177 uint8_t ip6r0_reserved; /* reserved field */ 178 uint8_t ip6r0_slmap[3]; /* strict/loose bit map */ 179 struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */ 180 } UNALIGNED; 181 182 /* Fragment header */ 183 struct ip6_frag { 184 uint8_t ip6f_nxt; /* next header */ 185 uint8_t ip6f_reserved; /* reserved field */ 186 uint16_t ip6f_offlg; /* offset, reserved, and flag */ 187 uint32_t ip6f_ident; /* identification */ 188 } UNALIGNED; 189 190 #define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */ 191 #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ 192 #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ 193 194 /* in print-ip6.c */ 195 extern int nextproto6_cksum(const struct ip6_hdr *, const uint8_t *, u_int, u_int, u_int); 196 197 #endif /* not _NETINET_IP6_H_ */ 198