ip6.h (bb4a7d94) ip6.h (82cd038d)
1/* $FreeBSD$ */
2/* $KAME: ip6.h,v 1.18 2001/03/29 05:34:30 itojun Exp $ */
3
4/*-
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
1/*
2 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright

--- 9 unchanged lines hidden (view full) ---

25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright

--- 9 unchanged lines hidden (view full) ---

20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
33 */
34
35/*-
36 * Copyright (c) 1982, 1986, 1993
37 * The Regents of the University of California. All rights reserved.
38 *
28 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. Neither the name of the University nor the names of its contributors
48 * may be used to endorse or promote products derived from this software
49 * without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * SUCH DAMAGE.
62 *
63 * @(#)ip.h 8.1 (Berkeley) 6/10/93
29 * $FreeBSD$
64 */
65
30 */
31
66#ifndef _NETINET_IP6_H_
67#define _NETINET_IP6_H_
68
69/*
70 * Definition for internet protocol version 6.
71 * RFC 2460
72 */
73
74struct ip6_hdr {
75 union {
76 struct ip6_hdrctl {
77 u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */
78 u_int16_t ip6_un1_plen; /* payload length */
79 u_int8_t ip6_un1_nxt; /* next header */
80 u_int8_t ip6_un1_hlim; /* hop limit */
81 } ip6_un1;
82 u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
83 } ip6_ctlun;
84 struct in6_addr ip6_src; /* source address */
85 struct in6_addr ip6_dst; /* destination address */
86} __packed;
87
88#define ip6_vfc ip6_ctlun.ip6_un2_vfc
89#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
90#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
91#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
92#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
93#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
94
95#define IPV6_VERSION 0x60
96#define IPV6_VERSION_MASK 0xf0
97
98#if BYTE_ORDER == BIG_ENDIAN
99#define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
100#define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
101#else
102#if BYTE_ORDER == LITTLE_ENDIAN
103#define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
104#define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
105#endif /* LITTLE_ENDIAN */
106#endif
107#define IPV6_FLOWLABEL_LEN 20
108
109#define IPV6_TRAFFIC_CLASS(ip6) ((ntohl((ip6)->ip6_flow) >> 20) & 0xff)
110#define IPV6_DSCP(ip6) ((ntohl((ip6)->ip6_flow) >> 20) & 0xfc)
111#define IPV6_ECN(ip6) ((ntohl((ip6)->ip6_flow) >> 20) & 0x03)
112
113/*
114 * Extension Headers
115 */
116
117struct ip6_ext {
118 u_int8_t ip6e_nxt;
119 u_int8_t ip6e_len;
120} __packed;
121
122/* Hop-by-Hop options header */
123/* XXX should we pad it to force alignment on an 8-byte boundary? */
124struct ip6_hbh {
125 u_int8_t ip6h_nxt; /* next header */
126 u_int8_t ip6h_len; /* length in units of 8 octets */
127 /* followed by options */
128} __packed;
129
130/* Destination options header */
131/* XXX should we pad it to force alignment on an 8-byte boundary? */
132struct ip6_dest {
133 u_int8_t ip6d_nxt; /* next header */
134 u_int8_t ip6d_len; /* length in units of 8 octets */
135 /* followed by options */
136} __packed;
137
138/* Option types and related macros */
139#define IP6OPT_PAD1 0x00 /* 00 0 00000 */
140#define IP6OPT_PADN 0x01 /* 00 0 00001 */
141#define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
142#define IP6OPT_NSAP_ADDR 0xC3 /* 11 0 00011 */
143#define IP6OPT_TUNNEL_LIMIT 0x04 /* 00 0 00100 */
144#ifndef _KERNEL
145#define IP6OPT_RTALERT 0x05 /* 00 0 00101 (KAME definition) */
146#endif
147#define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 (RFC3542, recommended) */
148
149#define IP6OPT_RTALERT_LEN 4
150#define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */
151#define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */
152#define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */
153#define IP6OPT_MINLEN 2
154
155#define IP6OPT_EID 0x8a /* 10 0 01010 */
156
157#define IP6OPT_TYPE(o) ((o) & 0xC0)
158#define IP6OPT_TYPE_SKIP 0x00
159#define IP6OPT_TYPE_DISCARD 0x40
160#define IP6OPT_TYPE_FORCEICMP 0x80
161#define IP6OPT_TYPE_ICMP 0xC0
162
163#define IP6OPT_MUTABLE 0x20
164
165/* IPv6 options: common part */
166struct ip6_opt {
167 u_int8_t ip6o_type;
168 u_int8_t ip6o_len;
169} __packed;
170
171/* Jumbo Payload Option */
172struct ip6_opt_jumbo {
173 u_int8_t ip6oj_type;
174 u_int8_t ip6oj_len;
175 u_int8_t ip6oj_jumbo_len[4];
176} __packed;
177#define IP6OPT_JUMBO_LEN 6
178
179/* NSAP Address Option */
180struct ip6_opt_nsap {
181 u_int8_t ip6on_type;
182 u_int8_t ip6on_len;
183 u_int8_t ip6on_src_nsap_len;
184 u_int8_t ip6on_dst_nsap_len;
185 /* followed by source NSAP */
186 /* followed by destination NSAP */
187} __packed;
188
189/* Tunnel Limit Option */
190struct ip6_opt_tunnel {
191 u_int8_t ip6ot_type;
192 u_int8_t ip6ot_len;
193 u_int8_t ip6ot_encap_limit;
194} __packed;
195
196/* Router Alert Option */
197struct ip6_opt_router {
198 u_int8_t ip6or_type;
199 u_int8_t ip6or_len;
200 u_int8_t ip6or_value[2];
201} __packed;
202/* Router alert values (in network byte order) */
203#if BYTE_ORDER == BIG_ENDIAN
204#define IP6_ALERT_MLD 0x0000
205#define IP6_ALERT_RSVP 0x0001
206#define IP6_ALERT_AN 0x0002
207#else
208#if BYTE_ORDER == LITTLE_ENDIAN
209#define IP6_ALERT_MLD 0x0000
210#define IP6_ALERT_RSVP 0x0100
211#define IP6_ALERT_AN 0x0200
212#endif /* LITTLE_ENDIAN */
213#endif
214
215/* Routing header */
216struct ip6_rthdr {
217 u_int8_t ip6r_nxt; /* next header */
218 u_int8_t ip6r_len; /* length in units of 8 octets */
219 u_int8_t ip6r_type; /* routing type */
220 u_int8_t ip6r_segleft; /* segments left */
221 /* followed by routing type specific data */
222} __packed;
223
224/* Type 0 Routing header, deprecated by RFC 5095. */
225struct ip6_rthdr0 {
226 u_int8_t ip6r0_nxt; /* next header */
227 u_int8_t ip6r0_len; /* length in units of 8 octets */
228 u_int8_t ip6r0_type; /* always zero */
229 u_int8_t ip6r0_segleft; /* segments left */
230 u_int32_t ip6r0_reserved; /* reserved field */
231 /* followed by up to 127 struct in6_addr */
232} __packed;
233
234/* Fragment header */
235struct ip6_frag {
236 u_int8_t ip6f_nxt; /* next header */
237 u_int8_t ip6f_reserved; /* reserved field */
238 u_int16_t ip6f_offlg; /* offset, reserved, and flag */
239 u_int32_t ip6f_ident; /* identification */
240} __packed;
241
242#if BYTE_ORDER == BIG_ENDIAN
243#define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
244#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
245#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
246#else /* BYTE_ORDER == LITTLE_ENDIAN */
247#define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */
248#define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */
249#define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */
250#endif /* BYTE_ORDER == LITTLE_ENDIAN */
251
252/*
253 * Internet implementation parameters.
254 */
255#define IPV6_MAXHLIM 255 /* maximum hoplimit */
256#define IPV6_DEFHLIM 64 /* default hlim */
257#define IPV6_FRAGTTL 120 /* ttl for fragment packets, in slowtimo tick */
258#define IPV6_HLIMDEC 1 /* subtracted when forwarding */
259
260#define IPV6_MMTU 1280 /* minimal MTU and reassembly. 1024 + 256 */
261#define IPV6_MAXPACKET 65535 /* ip6 max packet size without Jumbo payload*/
262#define IPV6_MAXOPTHDR 2048 /* max option header size, 256 64-bit words */
263
264#endif /* not _NETINET_IP6_H_ */
32#include <netinet6/ip6.h>