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1 office 1 /* NetBSD: ip6.h,v 1.9 2000/07/13 05:34:21 itojun Exp */
2 /* $KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $ */
3  
4 /*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32  
33 /*
34 * Copyright (c) 1982, 1986, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Berkeley and its contributors.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 *
65 * @(#)ip.h 8.1 (Berkeley) 6/10/93
66 */
67  
68 #ifndef _NETINET_IP6_H_
69 #define _NETINET_IP6_H_
70  
71 /*
72 * Definition for internet protocol version 6.
73 * RFC 2460
74 */
75  
76 struct ip6_hdr {
77 union {
78 struct ip6_hdrctl {
79 uint32_t ip6_un1_flow; /* 20 bits of flow-ID */
80 uint16_t ip6_un1_plen; /* payload length */
81 uint8_t ip6_un1_nxt; /* next header */
82 uint8_t ip6_un1_hlim; /* hop limit */
83 } ip6_un1;
84 uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
85 } ip6_ctlun;
86 struct in6_addr ip6_src; /* source address */
87 struct in6_addr ip6_dst; /* destination address */
88 } UNALIGNED;
89  
90 #define ip6_vfc ip6_ctlun.ip6_un2_vfc
91 #define IP6_VERSION(ip6_hdr) (((ip6_hdr)->ip6_vfc & 0xf0) >> 4)
92 #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
93 #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
94 #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
95 #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
96 #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
97  
98 /* in network endian */
99 #define IPV6_FLOWINFO_MASK ((uint32_t)htonl(0x0fffffff)) /* flow info (28 bits) */
100 #define IPV6_FLOWLABEL_MASK ((uint32_t)htonl(0x000fffff)) /* flow label (20 bits) */
101 #if 1
102 /* ECN bits proposed by Sally Floyd */
103 #define IP6TOS_CE 0x01 /* congestion experienced */
104 #define IP6TOS_ECT 0x02 /* ECN-capable transport */
105 #endif
106  
107 /*
108 * Extension Headers
109 */
110  
111 struct ip6_ext {
112 uint8_t ip6e_nxt;
113 uint8_t ip6e_len;
114 } UNALIGNED;
115  
116 /* Hop-by-Hop options header */
117 struct ip6_hbh {
118 uint8_t ip6h_nxt; /* next header */
119 uint8_t ip6h_len; /* length in units of 8 octets */
120 /* followed by options */
121 } UNALIGNED;
122  
123 /* Destination options header */
124 struct ip6_dest {
125 uint8_t ip6d_nxt; /* next header */
126 uint8_t ip6d_len; /* length in units of 8 octets */
127 /* followed by options */
128 } UNALIGNED;
129  
130 /* http://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml */
131  
132 /* Option types and related macros */
133 #define IP6OPT_PAD1 0x00 /* 00 0 00000 */
134 #define IP6OPT_PADN 0x01 /* 00 0 00001 */
135 #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
136 #define IP6OPT_JUMBO_LEN 6
137 #define IP6OPT_RPL 0x63 /* 01 1 00011 */
138 #define IP6OPT_TUN_ENC_LIMIT 0x04 /* 00 0 00100 */
139 #define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 */
140  
141 #define IP6OPT_RTALERT_LEN 4
142 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */
143 #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */
144 #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */
145 #define IP6OPT_MINLEN 2
146  
147 #define IP6OPT_QUICK_START 0x26 /* 00 1 00110 */
148 #define IP6OPT_CALIPSO 0x07 /* 00 0 00111 */
149 #define IP6OPT_SMF_DPD 0x08 /* 00 0 01000 */
150 #define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */
151 #define IP6OPT_HOMEADDR_MINLEN 18
152 #define IP6OPT_EID 0x8a /* 10 0 01010 */
153 #define IP6OPT_ILNP_NOTICE 0x8b /* 10 0 01011 */
154 #define IP6OPT_LINE_ID 0x8c /* 10 0 01100 */
155 #define IP6OPT_MPL 0x6d /* 01 1 01101 */
156 #define IP6OPT_IP_DFF 0xee /* 11 1 01110 */
157  
158 #define IP6OPT_TYPE(o) ((o) & 0xC0)
159 #define IP6OPT_TYPE_SKIP 0x00
160 #define IP6OPT_TYPE_DISCARD 0x40
161 #define IP6OPT_TYPE_FORCEICMP 0x80
162 #define IP6OPT_TYPE_ICMP 0xC0
163  
164 #define IP6OPT_MUTABLE 0x20
165  
166 /* Routing header */
167 struct ip6_rthdr {
168 uint8_t ip6r_nxt; /* next header */
169 uint8_t ip6r_len; /* length in units of 8 octets */
170 uint8_t ip6r_type; /* routing type */
171 uint8_t ip6r_segleft; /* segments left */
172 /* followed by routing type specific data */
173 } UNALIGNED;
174  
175 /* Type 0 Routing header */
176 struct ip6_rthdr0 {
177 uint8_t ip6r0_nxt; /* next header */
178 uint8_t ip6r0_len; /* length in units of 8 octets */
179 uint8_t ip6r0_type; /* always zero */
180 uint8_t ip6r0_segleft; /* segments left */
181 uint8_t ip6r0_reserved; /* reserved field */
182 uint8_t ip6r0_slmap[3]; /* strict/loose bit map */
183 struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */
184 } UNALIGNED;
185  
186 /* Fragment header */
187 struct ip6_frag {
188 uint8_t ip6f_nxt; /* next header */
189 uint8_t ip6f_reserved; /* reserved field */
190 uint16_t ip6f_offlg; /* offset, reserved, and flag */
191 uint32_t ip6f_ident; /* identification */
192 } UNALIGNED;
193  
194 #define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */
195 #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
196 #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
197  
198 /* in print-ip6.c */
199 extern int nextproto6_cksum(const struct ip6_hdr *, const uint8_t *, u_int, u_int, u_int);
200  
201 #endif /* not _NETINET_IP6_H_ */