/* NetBSD: ip6.h,v 1.9 2000/07/13 05:34:21 itojun Exp */ /* $KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ip.h 8.1 (Berkeley) 6/10/93 */ #ifndef _NETINET_IP6_H_ #define _NETINET_IP6_H_ /* * Definition for internet protocol version 6. * RFC 2460 */ struct ip6_hdr { union { struct ip6_hdrctl { nd_uint32_t ip6_un1_flow; /* 20 bits of flow-ID */ nd_uint16_t ip6_un1_plen; /* payload length */ nd_uint8_t ip6_un1_nxt; /* next header */ nd_uint8_t ip6_un1_hlim; /* hop limit */ } ip6_un1; nd_uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ } ip6_ctlun; struct in6_addr ip6_src; /* source address */ struct in6_addr ip6_dst; /* destination address */ } ND_UNALIGNED; #define ip6_vfc ip6_ctlun.ip6_un2_vfc #define IP6_VERSION(ip6_hdr) ((EXTRACT_U_1((ip6_hdr)->ip6_vfc) & 0xf0) >> 4) #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim /* in network endian */ #define IPV6_FLOWINFO_MASK ((uint32_t)htonl(0x0fffffff)) /* flow info (28 bits) */ #define IPV6_FLOWLABEL_MASK ((uint32_t)htonl(0x000fffff)) /* flow label (20 bits) */ #if 1 /* ECN bits proposed by Sally Floyd */ #define IP6TOS_CE 0x01 /* congestion experienced */ #define IP6TOS_ECT 0x02 /* ECN-capable transport */ #endif /* * Extension Headers */ struct ip6_ext { nd_uint8_t ip6e_nxt; nd_uint8_t ip6e_len; } ND_UNALIGNED; /* Hop-by-Hop options header */ struct ip6_hbh { nd_uint8_t ip6h_nxt; /* next header */ nd_uint8_t ip6h_len; /* length in units of 8 octets */ /* followed by options */ } ND_UNALIGNED; /* Destination options header */ struct ip6_dest { nd_uint8_t ip6d_nxt; /* next header */ nd_uint8_t ip6d_len; /* length in units of 8 octets */ /* followed by options */ } ND_UNALIGNED; /* http://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml */ /* Option types and related macros */ #define IP6OPT_PAD1 0x00 /* 00 0 00000 */ #define IP6OPT_PADN 0x01 /* 00 0 00001 */ #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */ #define IP6OPT_JUMBO_LEN 6 #define IP6OPT_RPL 0x63 /* 01 1 00011 */ #define IP6OPT_TUN_ENC_LIMIT 0x04 /* 00 0 00100 */ #define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 */ #define IP6OPT_RTALERT_LEN 4 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */ #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */ #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */ #define IP6OPT_MINLEN 2 #define IP6OPT_QUICK_START 0x26 /* 00 1 00110 */ #define IP6OPT_CALIPSO 0x07 /* 00 0 00111 */ #define IP6OPT_SMF_DPD 0x08 /* 00 0 01000 */ #define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */ #define IP6OPT_HOMEADDR_MINLEN 18 #define IP6OPT_EID 0x8a /* 10 0 01010 */ #define IP6OPT_ILNP_NOTICE 0x8b /* 10 0 01011 */ #define IP6OPT_LINE_ID 0x8c /* 10 0 01100 */ #define IP6OPT_MPL 0x6d /* 01 1 01101 */ #define IP6OPT_IP_DFF 0xee /* 11 1 01110 */ #define IP6OPT_TYPE(o) ((o) & 0xC0) #define IP6OPT_TYPE_SKIP 0x00 #define IP6OPT_TYPE_DISCARD 0x40 #define IP6OPT_TYPE_FORCEICMP 0x80 #define IP6OPT_TYPE_ICMP 0xC0 #define IP6OPT_MUTABLE 0x20 /* Routing header */ struct ip6_rthdr { nd_uint8_t ip6r_nxt; /* next header */ nd_uint8_t ip6r_len; /* length in units of 8 octets */ nd_uint8_t ip6r_type; /* routing type */ nd_uint8_t ip6r_segleft; /* segments left */ /* followed by routing type specific data */ } ND_UNALIGNED; #define IPV6_RTHDR_TYPE_0 0 #define IPV6_RTHDR_TYPE_2 2 #define IPV6_RTHDR_TYPE_4 4 /* Type 0 Routing header */ /* Also used for Type 2 */ struct ip6_rthdr0 { nd_uint8_t ip6r0_nxt; /* next header */ nd_uint8_t ip6r0_len; /* length in units of 8 octets */ nd_uint8_t ip6r0_type; /* always zero */ nd_uint8_t ip6r0_segleft; /* segments left */ nd_uint32_t ip6r0_reserved; /* reserved field */ struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */ }; /** * Type 4 Routing header * known as Segment Routing Header 'SRH' */ struct ip6_srh { nd_uint8_t srh_nxt; /* next header */ nd_uint8_t srh_len; /* length in units of 8 octets */ nd_uint8_t srh_type; /* Routing Type 4 */ nd_uint8_t srh_segleft; /* segments left */ nd_uint8_t srh_last_ent; /* Last Entry*/ nd_uint8_t srh_flags; /* Flags */ nd_uint16_t srh_tag; /* Tag */ struct in6_addr srh_segments[1]; /* SRH segments list*/ }; /* Fragment header */ struct ip6_frag { nd_uint8_t ip6f_nxt; /* next header */ nd_uint8_t ip6f_reserved; /* reserved field */ nd_uint16_t ip6f_offlg; /* offset, reserved, and flag */ nd_uint32_t ip6f_ident; /* identification */ } ND_UNALIGNED; #define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */ #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ #endif /* not _NETINET_IP6_H_ */