209 lines
7.6 KiB
C
209 lines
7.6 KiB
C
/* NetBSD: ip6.h,v 1.9 2000/07/13 05:34:21 itojun Exp */
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/* $KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ip.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef ND_IP6_H_
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#define ND_IP6_H_
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/*
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* Definition for internet protocol version 6.
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* RFC 2460
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*/
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struct ip6_hdr {
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union {
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struct ip6_hdrctl {
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nd_uint32_t ip6_un1_flow; /* 20 bits of flow-ID */
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nd_uint16_t ip6_un1_plen; /* payload length */
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nd_uint8_t ip6_un1_nxt; /* next header */
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nd_uint8_t ip6_un1_hlim; /* hop limit */
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} ip6_un1;
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nd_uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
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} ip6_ctlun;
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nd_ipv6 ip6_src; /* source address */
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nd_ipv6 ip6_dst; /* destination address */
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};
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#define ip6_vfc ip6_ctlun.ip6_un2_vfc
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#define IP6_VERSION(ip6_hdr) ((GET_U_1((ip6_hdr)->ip6_vfc) & 0xf0) >> 4)
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#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
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#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
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#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
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#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
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#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
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/* in network endian */
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#define IPV6_FLOWINFO_MASK ((uint32_t)htonl(0x0fffffff)) /* flow info (28 bits) */
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#define IPV6_FLOWLABEL_MASK ((uint32_t)htonl(0x000fffff)) /* flow label (20 bits) */
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/*
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* Extension Headers
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*/
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struct ip6_ext {
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nd_uint8_t ip6e_nxt;
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nd_uint8_t ip6e_len;
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};
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/* Hop-by-Hop options header */
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struct ip6_hbh {
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nd_uint8_t ip6h_nxt; /* next header */
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nd_uint8_t ip6h_len; /* length in units of 8 octets */
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/* followed by options */
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};
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/* Destination options header */
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struct ip6_dest {
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nd_uint8_t ip6d_nxt; /* next header */
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nd_uint8_t ip6d_len; /* length in units of 8 octets */
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/* followed by options */
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};
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/* https://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml */
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/* Option types and related macros */
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#define IP6OPT_PAD1 0x00 /* 00 0 00000 */
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#define IP6OPT_PADN 0x01 /* 00 0 00001 */
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#define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
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#define IP6OPT_JUMBO_LEN 6
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#define IP6OPT_RPL 0x63 /* 01 1 00011 */
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#define IP6OPT_TUN_ENC_LIMIT 0x04 /* 00 0 00100 */
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#define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 */
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#define IP6OPT_RTALERT_LEN 4
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#define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */
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#define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */
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#define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */
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#define IP6OPT_MINLEN 2
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#define IP6OPT_QUICK_START 0x26 /* 00 1 00110 */
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#define IP6OPT_CALIPSO 0x07 /* 00 0 00111 */
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#define IP6OPT_SMF_DPD 0x08 /* 00 0 01000 */
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#define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */
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#define IP6OPT_HOMEADDR_MINLEN 18
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#define IP6OPT_EID 0x8a /* 10 0 01010 */
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#define IP6OPT_ILNP_NOTICE 0x8b /* 10 0 01011 */
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#define IP6OPT_LINE_ID 0x8c /* 10 0 01100 */
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#define IP6OPT_MPL 0x6d /* 01 1 01101 */
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#define IP6OPT_IP_DFF 0xee /* 11 1 01110 */
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#define IP6OPT_TYPE(o) ((o) & 0xC0)
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#define IP6OPT_TYPE_SKIP 0x00
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#define IP6OPT_TYPE_DISCARD 0x40
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#define IP6OPT_TYPE_FORCEICMP 0x80
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#define IP6OPT_TYPE_ICMP 0xC0
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#define IP6OPT_MUTABLE 0x20
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/* Routing header */
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struct ip6_rthdr {
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nd_uint8_t ip6r_nxt; /* next header */
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nd_uint8_t ip6r_len; /* length in units of 8 octets */
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nd_uint8_t ip6r_type; /* routing type */
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nd_uint8_t ip6r_segleft; /* segments left */
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/* followed by routing type specific data */
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};
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#define IPV6_RTHDR_TYPE_0 0
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#define IPV6_RTHDR_TYPE_2 2
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#define IPV6_RTHDR_TYPE_4 4
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/* Type 0 Routing header */
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/* Also used for Type 2 */
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struct ip6_rthdr0 {
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nd_uint8_t ip6r0_nxt; /* next header */
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nd_uint8_t ip6r0_len; /* length in units of 8 octets */
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nd_uint8_t ip6r0_type; /* always zero */
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nd_uint8_t ip6r0_segleft; /* segments left */
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nd_uint32_t ip6r0_reserved; /* reserved field */
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nd_ipv6 ip6r0_addr[1]; /* up to 23 addresses */
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};
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/**
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* Type 4 Routing header
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* known as Segment Routing Header 'SRH'
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*/
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struct ip6_srh {
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nd_uint8_t srh_nxt; /* next header */
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nd_uint8_t srh_len; /* length in units of 8 octets */
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nd_uint8_t srh_type; /* Routing Type 4 */
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nd_uint8_t srh_segleft; /* segments left */
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nd_uint8_t srh_last_ent; /* Last Entry*/
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nd_uint8_t srh_flags; /* Flags */
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nd_uint16_t srh_tag; /* Tag */
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nd_ipv6 srh_segments[1]; /* SRH segments list*/
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};
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/* Fragment header */
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struct ip6_frag {
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nd_uint8_t ip6f_nxt; /* next header */
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nd_uint8_t ip6f_reserved; /* reserved field */
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nd_uint16_t ip6f_offlg; /* offset, reserved, and flag */
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nd_uint32_t ip6f_ident; /* identification */
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};
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#define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */
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#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
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#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
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#endif /* not ND_IP6_H_ */
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