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[netbsd-mini2440.git] / dist / tcpdump / ip6.h
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1 /* $NetBSD$ */
3 /* @(#) Header: /tcpdump/master/tcpdump/ip6.h,v 1.6.4.1 2005/04/20 10:04:37 guy Exp (LBL) */
4 /* NetBSD: ip6.h,v 1.9 2000/07/13 05:34:21 itojun Exp */
5 /* $KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $ */
7 /*
8 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * All rights reserved.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the project nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
37 * Copyright (c) 1982, 1986, 1993
38 * The Regents of the University of California. All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
64 * @(#)ip.h 8.1 (Berkeley) 6/10/93
67 #ifndef _NETINET_IP6_H_
68 #define _NETINET_IP6_H_
71 * Definition for internet protocol version 6.
72 * RFC 2460
75 struct ip6_hdr {
76 union {
77 struct ip6_hdrctl {
78 u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */
79 u_int16_t ip6_un1_plen; /* payload length */
80 u_int8_t ip6_un1_nxt; /* next header */
81 u_int8_t ip6_un1_hlim; /* hop limit */
82 } ip6_un1;
83 u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
84 } ip6_ctlun;
85 struct in6_addr ip6_src; /* source address */
86 struct in6_addr ip6_dst; /* destination address */
89 #define ip6_vfc ip6_ctlun.ip6_un2_vfc
90 #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
91 #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
92 #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
93 #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
94 #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
96 /* in network endian */
97 #define IPV6_FLOWINFO_MASK ((u_int32_t)htonl(0x0fffffff)) /* flow info (28 bits) */
98 #define IPV6_FLOWLABEL_MASK ((u_int32_t)htonl(0x000fffff)) /* flow label (20 bits) */
99 #if 1
100 /* ECN bits proposed by Sally Floyd */
101 #define IP6TOS_CE 0x01 /* congestion experienced */
102 #define IP6TOS_ECT 0x02 /* ECN-capable transport */
103 #endif
106 * Extension Headers
109 struct ip6_ext {
110 u_char ip6e_nxt;
111 u_char ip6e_len;
114 /* Hop-by-Hop options header */
115 /* XXX should we pad it to force alignment on an 8-byte boundary? */
116 struct ip6_hbh {
117 u_int8_t ip6h_nxt; /* next header */
118 u_int8_t ip6h_len; /* length in units of 8 octets */
119 /* followed by options */
122 /* Destination options header */
123 /* XXX should we pad it to force alignment on an 8-byte boundary? */
124 struct ip6_dest {
125 u_int8_t ip6d_nxt; /* next header */
126 u_int8_t ip6d_len; /* length in units of 8 octets */
127 /* followed by options */
130 /* Option types and related macros */
131 #define IP6OPT_PAD1 0x00 /* 00 0 00000 */
132 #define IP6OPT_PADN 0x01 /* 00 0 00001 */
133 #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
134 #define IP6OPT_JUMBO_LEN 6
135 #define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 */
137 #define IP6OPT_RTALERT_LEN 4
138 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */
139 #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */
140 #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */
141 #define IP6OPT_MINLEN 2
143 #define IP6OPT_BINDING_UPDATE 0xc6 /* 11 0 00110 */
144 #define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */
145 #define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */
146 #define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */
147 #define IP6OPT_EID 0x8a /* 10 0 01010 */
149 #define IP6OPT_TYPE(o) ((o) & 0xC0)
150 #define IP6OPT_TYPE_SKIP 0x00
151 #define IP6OPT_TYPE_DISCARD 0x40
152 #define IP6OPT_TYPE_FORCEICMP 0x80
153 #define IP6OPT_TYPE_ICMP 0xC0
155 #define IP6OPT_MUTABLE 0x20
157 /* Routing header */
158 struct ip6_rthdr {
159 u_int8_t ip6r_nxt; /* next header */
160 u_int8_t ip6r_len; /* length in units of 8 octets */
161 u_int8_t ip6r_type; /* routing type */
162 u_int8_t ip6r_segleft; /* segments left */
163 /* followed by routing type specific data */
166 /* Type 0 Routing header */
167 struct ip6_rthdr0 {
168 u_int8_t ip6r0_nxt; /* next header */
169 u_int8_t ip6r0_len; /* length in units of 8 octets */
170 u_int8_t ip6r0_type; /* always zero */
171 u_int8_t ip6r0_segleft; /* segments left */
172 u_int8_t ip6r0_reserved; /* reserved field */
173 u_int8_t ip6r0_slmap[3]; /* strict/loose bit map */
174 struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */
177 /* Fragment header */
178 struct ip6_frag {
179 u_int8_t ip6f_nxt; /* next header */
180 u_int8_t ip6f_reserved; /* reserved field */
181 u_int16_t ip6f_offlg; /* offset, reserved, and flag */
182 u_int32_t ip6f_ident; /* identification */
185 #define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */
186 #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
187 #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
189 #endif /* not _NETINET_IP6_H_ */