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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _LINUX_ICMPV6_H
3#define _LINUX_ICMPV6_H
4
5#include <linux/types.h>
6#include <asm/byteorder.h>
7
8struct icmp6hdr {
9
10 __u8 icmp6_type;
11 __u8 icmp6_code;
12 __sum16 icmp6_cksum;
13
14
15 union {
16 __be32 un_data32[1];
17 __be16 un_data16[2];
18 __u8 un_data8[4];
19
20 struct icmpv6_echo {
21 __be16 identifier;
22 __be16 sequence;
23 } u_echo;
24
25 struct icmpv6_nd_advt {
26#if defined(__LITTLE_ENDIAN_BITFIELD)
27 __u32 reserved:5,
28 override:1,
29 solicited:1,
30 router:1,
31 reserved2:24;
32#elif defined(__BIG_ENDIAN_BITFIELD)
33 __u32 router:1,
34 solicited:1,
35 override:1,
36 reserved:29;
37#else
38#error "Please fix <asm/byteorder.h>"
39#endif
40 } u_nd_advt;
41
42 struct icmpv6_nd_ra {
43 __u8 hop_limit;
44#if defined(__LITTLE_ENDIAN_BITFIELD)
45 __u8 reserved:3,
46 router_pref:2,
47 home_agent:1,
48 other:1,
49 managed:1;
50
51#elif defined(__BIG_ENDIAN_BITFIELD)
52 __u8 managed:1,
53 other:1,
54 home_agent:1,
55 router_pref:2,
56 reserved:3;
57#else
58#error "Please fix <asm/byteorder.h>"
59#endif
60 __be16 rt_lifetime;
61 } u_nd_ra;
62
63 } icmp6_dataun;
64
65#define icmp6_identifier icmp6_dataun.u_echo.identifier
66#define icmp6_sequence icmp6_dataun.u_echo.sequence
67#define icmp6_pointer icmp6_dataun.un_data32[0]
68#define icmp6_mtu icmp6_dataun.un_data32[0]
69#define icmp6_unused icmp6_dataun.un_data32[0]
70#define icmp6_maxdelay icmp6_dataun.un_data16[0]
71#define icmp6_datagram_len icmp6_dataun.un_data8[0]
72#define icmp6_router icmp6_dataun.u_nd_advt.router
73#define icmp6_solicited icmp6_dataun.u_nd_advt.solicited
74#define icmp6_override icmp6_dataun.u_nd_advt.override
75#define icmp6_ndiscreserved icmp6_dataun.u_nd_advt.reserved
76#define icmp6_hop_limit icmp6_dataun.u_nd_ra.hop_limit
77#define icmp6_addrconf_managed icmp6_dataun.u_nd_ra.managed
78#define icmp6_addrconf_other icmp6_dataun.u_nd_ra.other
79#define icmp6_rt_lifetime icmp6_dataun.u_nd_ra.rt_lifetime
80#define icmp6_router_pref icmp6_dataun.u_nd_ra.router_pref
81};
82
83
84#define ICMPV6_ROUTER_PREF_LOW 0x3
85#define ICMPV6_ROUTER_PREF_MEDIUM 0x0
86#define ICMPV6_ROUTER_PREF_HIGH 0x1
87#define ICMPV6_ROUTER_PREF_INVALID 0x2
88
89#define ICMPV6_DEST_UNREACH 1
90#define ICMPV6_PKT_TOOBIG 2
91#define ICMPV6_TIME_EXCEED 3
92#define ICMPV6_PARAMPROB 4
93
94#define ICMPV6_ERRMSG_MAX 127
95
96#define ICMPV6_INFOMSG_MASK 0x80
97
98#define ICMPV6_ECHO_REQUEST 128
99#define ICMPV6_ECHO_REPLY 129
100#define ICMPV6_MGM_QUERY 130
101#define ICMPV6_MGM_REPORT 131
102#define ICMPV6_MGM_REDUCTION 132
103
104#define ICMPV6_NI_QUERY 139
105#define ICMPV6_NI_REPLY 140
106
107#define ICMPV6_MLD2_REPORT 143
108
109#define ICMPV6_DHAAD_REQUEST 144
110#define ICMPV6_DHAAD_REPLY 145
111#define ICMPV6_MOBILE_PREFIX_SOL 146
112#define ICMPV6_MOBILE_PREFIX_ADV 147
113
114#define ICMPV6_MRDISC_ADV 151
115#define ICMPV6_MRDISC_SOL 152
116
117#define ICMPV6_MSG_MAX 255
118
119/*
120 * Codes for Destination Unreachable
121 */
122#define ICMPV6_NOROUTE 0
123#define ICMPV6_ADM_PROHIBITED 1
124#define ICMPV6_NOT_NEIGHBOUR 2
125#define ICMPV6_ADDR_UNREACH 3
126#define ICMPV6_PORT_UNREACH 4
127#define ICMPV6_POLICY_FAIL 5
128#define ICMPV6_REJECT_ROUTE 6
129
130/*
131 * Codes for Time Exceeded
132 */
133#define ICMPV6_EXC_HOPLIMIT 0
134#define ICMPV6_EXC_FRAGTIME 1
135
136/*
137 * Codes for Parameter Problem
138 */
139#define ICMPV6_HDR_FIELD 0
140#define ICMPV6_UNK_NEXTHDR 1
141#define ICMPV6_UNK_OPTION 2
142#define ICMPV6_HDR_INCOMP 3
143
144/* Codes for EXT_ECHO (PROBE) */
145#define ICMPV6_EXT_ECHO_REQUEST 160
146#define ICMPV6_EXT_ECHO_REPLY 161
147/*
148 * constants for (set|get)sockopt
149 */
150
151#define ICMPV6_FILTER 1
152
153/*
154 * ICMPV6 filter
155 */
156
157#define ICMPV6_FILTER_BLOCK 1
158#define ICMPV6_FILTER_PASS 2
159#define ICMPV6_FILTER_BLOCKOTHERS 3
160#define ICMPV6_FILTER_PASSONLY 4
161
162struct icmp6_filter {
163 __u32 data[8];
164};
165
166/*
167 * Definitions for MLDv2
168 */
169#define MLD2_MODE_IS_INCLUDE 1
170#define MLD2_MODE_IS_EXCLUDE 2
171#define MLD2_CHANGE_TO_INCLUDE 3
172#define MLD2_CHANGE_TO_EXCLUDE 4
173#define MLD2_ALLOW_NEW_SOURCES 5
174#define MLD2_BLOCK_OLD_SOURCES 6
175
176#define MLD2_ALL_MCR_INIT { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x16 } } }
177
178
179#endif /* _LINUX_ICMPV6_H */