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ip6.h
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ip6.h
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/* 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_ */