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Diffstat (limited to 'ip6.h')
| -rw-r--r-- | ip6.h | 212 |
1 files changed, 212 insertions, 0 deletions
@@ -0,0 +1,212 @@ +/* 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 ND_IP6_H_ +#define ND_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; + nd_ipv6 ip6_src; /* source address */ + nd_ipv6 ip6_dst; /* destination address */ +}; + +#define ip6_vfc ip6_ctlun.ip6_un2_vfc +#define IP6_VERSION(ip6_hdr) ((GET_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) */ + +/* + * Extension Headers + */ + +struct ip6_ext { + nd_uint8_t ip6e_nxt; + nd_uint8_t ip6e_len; +}; + +/* 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 */ +}; + +/* 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 */ +}; + +/* https://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 */ +}; + +#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 */ + nd_ipv6 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 */ + nd_ipv6 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 */ +}; + +#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 ND_IP6_H_ */ |