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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 /*
     27  * ip6.h - Common structures and definitions as defined by
     28  * advanced BSD API.
     29  */
     30 
     31 #ifndef	_NETINET_IP6_H
     32 #define	_NETINET_IP6_H
     33 
     34 #pragma ident	"@(#)ip6.h	1.7	06/03/24 SMI"
     35 
     36 #ifdef	__cplusplus
     37 extern "C" {
     38 #endif
     39 
     40 #include <sys/types.h>
     41 #include <netinet/in.h>
     42 
     43 struct	ip6_hdr {
     44 	union {
     45 		struct ip6_hdrctl {
     46 			uint32_t	ip6_un1_flow;   /* 4 bits version, */
     47 							/* 8 bits tclass, and */
     48 							/* 20 bits flow-ID */
     49 			uint16_t	ip6_un1_plen;   /* payload length */
     50 			uint8_t		ip6_un1_nxt;    /* next header */
     51 			uint8_t		ip6_un1_hlim;   /* hop limit */
     52 		} ip6_un1;
     53 		uint8_t	ip6_un2_vfc;	/* 4 bits version and */
     54 					/* top 4 bits of tclass */
     55 	} ip6_ctlun;
     56 	struct in6_addr ip6_src;	/* source address */
     57 	struct in6_addr ip6_dst;	/* destination address */
     58 };
     59 typedef struct ip6_hdr	ip6_t;
     60 
     61 #define	ip6_vfc		ip6_ctlun.ip6_un2_vfc	/* 4 bits version and */
     62 						/* top 4 bits of tclass */
     63 #define	ip6_flow	ip6_ctlun.ip6_un1.ip6_un1_flow
     64 #define	ip6_vcf		ip6_flow		/* Version, tclass, flow-ID */
     65 #define	ip6_plen	ip6_ctlun.ip6_un1.ip6_un1_plen
     66 #define	ip6_nxt		ip6_ctlun.ip6_un1.ip6_un1_nxt
     67 #define	ip6_hlim	ip6_ctlun.ip6_un1.ip6_un1_hlim
     68 #define	ip6_hops	ip6_ctlun.ip6_un1.ip6_un1_hlim
     69 
     70 /* Hop-by-Hop options header */
     71 struct ip6_hbh {
     72 	uint8_t	ip6h_nxt;	/* next header */
     73 	uint8_t	ip6h_len;	/* length in units of 8 octets */
     74 		/* followed by options */
     75 };
     76 typedef struct ip6_hbh	ip6_hbh_t;
     77 
     78 /* Destination options header */
     79 struct ip6_dest {
     80 	uint8_t	ip6d_nxt;	/* next header */
     81 	uint8_t	ip6d_len;	/* length in units of 8 octets */
     82 		/* followed by options */
     83 };
     84 typedef struct ip6_dest	ip6_dest_t;
     85 
     86 /* Routing header */
     87 struct ip6_rthdr {
     88 	uint8_t	ip6r_nxt;	/* next header */
     89 	uint8_t	ip6r_len;	/* length in units of 8 octets */
     90 	uint8_t	ip6r_type;	/* routing type */
     91 	uint8_t	ip6r_segleft;	/* segments left */
     92 		/* followed by routing type specific data */
     93 };
     94 typedef struct ip6_rthdr	ip6_rthdr_t;
     95 
     96 /* Type 0 Routing header */
     97 struct ip6_rthdr0 {
     98 	uint8_t	ip6r0_nxt;		/* next header */
     99 	uint8_t	ip6r0_len;		/* length in units of 8 octets */
    100 	uint8_t	ip6r0_type;		/* always zero */
    101 	uint8_t	ip6r0_segleft;		/* segments left */
    102 	uint32_t ip6r0_reserved;	/* reserved field */
    103 };
    104 typedef struct ip6_rthdr0	ip6_rthdr0_t;
    105 
    106 /* Fragment header */
    107 struct ip6_frag {
    108 	uint8_t		ip6f_nxt;	/* next header */
    109 	uint8_t		ip6f_reserved;	/* reserved field */
    110 	uint16_t	ip6f_offlg;	/* offset, reserved, and flag */
    111 	uint32_t	ip6f_ident;	/* identification */
    112 };
    113 typedef struct ip6_frag	ip6_frag_t;
    114 
    115 /* ip6f_offlg field related constants (in network byte order) */
    116 #ifdef _BIG_ENDIAN
    117 #define	IP6F_OFF_MASK		0xfff8	/* mask out offset from _offlg */
    118 #define	IP6F_RESERVED_MASK	0x0006	/* reserved bits in ip6f_offlg */
    119 #define	IP6F_MORE_FRAG		0x0001	/* more-fragments flag */
    120 #else
    121 #define	IP6F_OFF_MASK		0xf8ff	/* mask out offset from _offlg */
    122 #define	IP6F_RESERVED_MASK	0x0600	/* reserved bits in ip6f_offlg */
    123 #define	IP6F_MORE_FRAG		0x0100	/* more-fragments flag */
    124 #endif
    125 
    126 /* IPv6 options */
    127 struct	ip6_opt {
    128 	uint8_t	ip6o_type;
    129 	uint8_t	ip6o_len;
    130 };
    131 
    132 /*
    133  * The high-order 3 bits of the option type define the behavior
    134  * when processing an unknown option and whether or not the option
    135  * content changes in flight.
    136  */
    137 #define	IP6OPT_TYPE(o)		((o) & 0xc0)
    138 #define	IP6OPT_TYPE_SKIP	0x00
    139 #define	IP6OPT_TYPE_DISCARD	0x40
    140 #define	IP6OPT_TYPE_FORCEICMP	0x80
    141 #define	IP6OPT_TYPE_ICMP	0xc0
    142 #define	IP6OPT_MUTABLE		0x20
    143 
    144 #define	IP6OPT_PAD1			0x00	/* 00 0 00000 */
    145 #define	IP6OPT_PADN			0x01	/* 00 0 00001 */
    146 #define	IP6OPT_JUMBO			0xc2	/* 11 0 00010 = 194 */
    147 #define	IP6OPT_NSAP_ADDR		0xc3	/* 11 0 00011 */
    148 #define	IP6OPT_TUNNEL_LIMIT		0x04	/* 00 0 00100 */
    149 #define	IP6OPT_ROUTER_ALERT		0x05	/* 00 0 00101 */
    150 #define	IP6OPT_BINDING_UPDATE		0xc6	/* 11 0 00110 */
    151 #define	IP6OPT_BINDING_ACK		0x07	/* 00 0 00111 */
    152 #define	IP6OPT_BINDING_REQ		0x08	/* 00 0 01000 */
    153 #define	IP6OPT_HOME_ADDRESS		0xc9	/* 11 0 01001 */
    154 #define	IP6OPT_EID			0x8a	/* 10 0 01010 */
    155 
    156 #define	IP6OPT_LS			0x0a	/* 00 0 01010 */
    157 
    158 #define	IP6_MAX_OPT_LENGTH	255
    159 
    160 /* Jumbo Payload Option */
    161 struct	ip6_opt_jumbo {
    162 	uint8_t	ip6oj_type;
    163 	uint8_t	ip6oj_len;
    164 	uint8_t ip6oj_jumbo_len[4];
    165 };
    166 #define	IP6OPT_JUMBO_LEN	6
    167 
    168 /* NSAP Address Option */
    169 struct	ip6_opt_nsap {
    170 	uint8_t	ip6on_type;
    171 	uint8_t	ip6on_len;
    172 	uint8_t ip6on_src_nsap_len;
    173 	uint8_t ip6on_dst_nsap_len;
    174 	/* Followed by source NSAP */
    175 	/* Followed by destination NSAP */
    176 };
    177 
    178 /* Tunnel Limit Option */
    179 struct	ip6_opt_tunnel {
    180 	uint8_t	ip6ot_type;
    181 	uint8_t	ip6ot_len;
    182 	uint8_t ip6ot_encap_limit;
    183 };
    184 
    185 /* Router Alert Option */
    186 struct	ip6_opt_router {
    187 	uint8_t	ip6or_type;
    188 	uint8_t	ip6or_len;
    189 	uint8_t ip6or_value[2];
    190 };
    191 
    192 /* Router alert values (in network byte order) */
    193 #ifdef _BIG_ENDIAN
    194 #define	IP6_ALERT_MLD			0x0000
    195 #define	IP6_ALERT_RSVP			0x0001
    196 #define	IP6_ALERT_AN			0x0002
    197 #else
    198 #define	IP6_ALERT_MLD			0x0000
    199 #define	IP6_ALERT_RSVP			0x0100
    200 #define	IP6_ALERT_AN			0x0200
    201 #endif
    202 
    203 /* Binding Update Option */
    204 struct	ip6_opt_binding_update {
    205 	uint8_t	ip6ou_type;
    206 	uint8_t	ip6ou_len;
    207 	uint8_t ip6ou_flags;
    208 	uint8_t ip6ou_prefixlen;
    209 	uint8_t ip6ou_seqno[2];
    210 	uint8_t ip6ou_lifetime[4];
    211 	uint8_t ip6ou_coa[16];		/* Optional based on flags */
    212 	/* Followed by sub-options */
    213 };
    214 
    215 /* Binding Update Flags */
    216 #define	IP6_BUF_ACK	0x80	/* Request a binding ack */
    217 #define	IP6_BUF_HOME	0x40	/* Home Registration */
    218 #define	IP6_BUF_COA	0x20	/* Care-of-address present in option */
    219 #define	IP6_BUF_ROUTER	0x10	/* Sending mobile node is a router */
    220 
    221 /* Binding Ack Option */
    222 struct	ip6_opt_binding_ack {
    223 	uint8_t	ip6oa_type;
    224 	uint8_t	ip6oa_len;
    225 	uint8_t ip6oa_status;
    226 	uint8_t ip6oa_seqno[2];
    227 	uint8_t ip6oa_lifetime[4];
    228 	uint8_t ip6oa_refresh[4];
    229 	/* Followed by sub-options */
    230 };
    231 
    232 /* Binding Request Option */
    233 struct	ip6_opt_binding_request {
    234 	uint8_t	ip6or_type;
    235 	uint8_t	ip6or_len;
    236 	/* Followed by sub-options */
    237 };
    238 
    239 /* Home Address Option */
    240 struct	ip6_opt_home_address {
    241 	uint8_t	ip6oh_type;
    242 	uint8_t	ip6oh_len;
    243 	uint8_t ip6oh_addr[16];		/* Home Address */
    244 	/* Followed by sub-options */
    245 };
    246 
    247 /* Labeled Security Option */
    248 struct	ip6_opt_labeled_security {
    249 	uint8_t ip6ol_type;
    250 	uint8_t ip6ol_len;	/* always even for defined values */
    251 	uint8_t ip6ol_doi[4];
    252 	/* Followed by sub-options */
    253 };
    254 
    255 #define	IP6LS_DOI_V4	0	/* IPv4 transition */
    256 
    257 #define	IP6LS_TT_LEVEL	1	/* level or classification; 2-octet value */
    258 #define	IP6LS_TT_VECTOR	2	/* compartments; bit vector (even # octets) */
    259 #define	IP6LS_TT_ENUM	3	/* set membership; list of 2-octet values */
    260 #define	IP6LS_TT_RANGES	4	/* set membership; pairs of 2-octet values */
    261 #define	IP6LS_TT_V4	5	/* IPv4 compatible option */
    262 #define	IP6LS_TT_DEST	6	/* destination-only data; per DOI */
    263 
    264 #ifdef	__cplusplus
    265 }
    266 #endif
    267 
    268 #endif	/* _NETINET_IP6_H */
    269