1 /* $NetBSD: ip6.h,v 1.23 2007/12/25 18:33:46 perry Exp $ */ 2 /* $KAME: ip6.h,v 1.45 2003/06/05 04:46:38 keiichi 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 #include <sys/cdefs.h> 68 #include <sys/types.h> 69 #include <endian.h> 70 71 #include <linux/in6.h> 72 73 /* 74 * Definition for internet protocol version 6. 75 * RFC 2460 76 */ 77 78 struct ip6_hdr { 79 union { 80 struct ip6_hdrctl { 81 u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */ 82 u_int16_t ip6_un1_plen; /* payload length */ 83 u_int8_t ip6_un1_nxt; /* next header */ 84 u_int8_t ip6_un1_hlim; /* hop limit */ 85 } ip6_un1; 86 u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ 87 } ip6_ctlun; 88 struct in6_addr ip6_src; /* source address */ 89 struct in6_addr ip6_dst; /* destination address */ 90 } __packed; 91 92 #define ip6_vfc ip6_ctlun.ip6_un2_vfc 93 #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow 94 #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen 95 #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt 96 #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim 97 #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim 98 99 #define IPV6_VERSION 0x60 100 #define IPV6_VERSION_MASK 0xf0 101 102 #define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */ 103 #define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */ 104 105 #if 1 106 /* ECN bits proposed by Sally Floyd */ 107 #define IP6TOS_CE 0x01 /* congestion experienced */ 108 #define IP6TOS_ECT 0x02 /* ECN-capable transport */ 109 #endif 110 111 /* 112 * Extension Headers 113 */ 114 115 struct ip6_ext { 116 u_int8_t ip6e_nxt; 117 u_int8_t ip6e_len; 118 } __packed; 119 120 /* Hop-by-Hop options header */ 121 /* XXX should we pad it to force alignment on an 8-byte boundary? */ 122 struct ip6_hbh { 123 u_int8_t ip6h_nxt; /* next header */ 124 u_int8_t ip6h_len; /* length in units of 8 octets */ 125 /* followed by options */ 126 } __packed; 127 128 /* Destination options header */ 129 /* XXX should we pad it to force alignment on an 8-byte boundary? */ 130 struct ip6_dest { 131 u_int8_t ip6d_nxt; /* next header */ 132 u_int8_t ip6d_len; /* length in units of 8 octets */ 133 /* followed by options */ 134 } __packed; 135 136 /* Option types and related macros */ 137 #define IP6OPT_PAD1 0x00 /* 00 0 00000 */ 138 #define IP6OPT_PADN 0x01 /* 00 0 00001 */ 139 #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */ 140 #define IP6OPT_NSAP_ADDR 0xC3 /* 11 0 00011 */ 141 #define IP6OPT_TUNNEL_LIMIT 0x04 /* 00 0 00100 */ 142 #define IP6OPT_RTALERT 0x05 /* 00 0 00101 (KAME definition) */ 143 #define IP6OPT_ROUTER_ALERT 0x05 /* (RFC3542 def, recommended) */ 144 145 #define IP6OPT_RTALERT_LEN 4 146 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */ 147 #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */ 148 #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */ 149 #define IP6OPT_MINLEN 2 150 151 #define IP6OPT_TYPE(o) ((o) & 0xC0) 152 #define IP6OPT_TYPE_SKIP 0x00 153 #define IP6OPT_TYPE_DISCARD 0x40 154 #define IP6OPT_TYPE_FORCEICMP 0x80 155 #define IP6OPT_TYPE_ICMP 0xC0 156 157 #define IP6OPT_MUTABLE 0x20 158 159 /* IPv6 options: common part */ 160 struct ip6_opt { 161 u_int8_t ip6o_type; 162 u_int8_t ip6o_len; 163 } __packed; 164 165 /* Jumbo Payload Option */ 166 struct ip6_opt_jumbo { 167 u_int8_t ip6oj_type; 168 u_int8_t ip6oj_len; 169 u_int8_t ip6oj_jumbo_len[4]; 170 } __packed; 171 #define IP6OPT_JUMBO_LEN 6 172 173 /* NSAP Address Option */ 174 struct ip6_opt_nsap { 175 u_int8_t ip6on_type; 176 u_int8_t ip6on_len; 177 u_int8_t ip6on_src_nsap_len; 178 u_int8_t ip6on_dst_nsap_len; 179 /* followed by source NSAP */ 180 /* followed by destination NSAP */ 181 } __packed; 182 183 /* Tunnel Limit Option */ 184 struct ip6_opt_tunnel { 185 u_int8_t ip6ot_type; 186 u_int8_t ip6ot_len; 187 u_int8_t ip6ot_encap_limit; 188 } __packed; 189 190 /* Router Alert Option */ 191 struct ip6_opt_router { 192 u_int8_t ip6or_type; 193 u_int8_t ip6or_len; 194 u_int8_t ip6or_value[2]; 195 } __packed; 196 /* Router alert values (in network byte order) */ 197 #define IP6_ALERT_MLD 0x0000 198 #define IP6_ALERT_RSVP 0x0100 199 #define IP6_ALERT_AN 0x0200 200 201 /* Routing header */ 202 struct ip6_rthdr { 203 u_int8_t ip6r_nxt; /* next header */ 204 u_int8_t ip6r_len; /* length in units of 8 octets */ 205 u_int8_t ip6r_type; /* routing type */ 206 u_int8_t ip6r_segleft; /* segments left */ 207 /* followed by routing type specific data */ 208 } __packed; 209 210 /* Type 0 Routing header */ 211 struct ip6_rthdr0 { 212 u_int8_t ip6r0_nxt; /* next header */ 213 u_int8_t ip6r0_len; /* length in units of 8 octets */ 214 u_int8_t ip6r0_type; /* always zero */ 215 u_int8_t ip6r0_segleft; /* segments left */ 216 u_int32_t ip6r0_reserved; /* reserved field */ 217 } __packed; 218 219 /* Fragment header */ 220 struct ip6_frag { 221 u_int8_t ip6f_nxt; /* next header */ 222 u_int8_t ip6f_reserved; /* reserved field */ 223 u_int16_t ip6f_offlg; /* offset, reserved, and flag */ 224 u_int32_t ip6f_ident; /* identification */ 225 } __packed; 226 227 #define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */ 228 #define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */ 229 #define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */ 230 231 /* 232 * Internet implementation parameters. 233 */ 234 #define IPV6_MAXHLIM 255 /* maximum hoplimit */ 235 #define IPV6_DEFHLIM 64 /* default hlim */ 236 #define IPV6_FRAGTTL 120 /* ttl for fragment packets, in slowtimo tick */ 237 #define IPV6_HLIMDEC 1 /* subtracted when forwarding */ 238 239 #define IPV6_MMTU 1280 /* minimal MTU and reassembly. 1024 + 256 */ 240 #define IPV6_MAXPACKET 65535 /* ip6 max packet size without Jumbo payload*/ 241 242 #endif /* !_NETINET_IP6_H_ */ 243
