1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPI_LINUX_ICMPV6_H
3#define _UAPI_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
116#define ICMPV6_MSG_MAX          255
117
118/*
119 *	Codes for Destination Unreachable
120 */
121#define ICMPV6_NOROUTE			0
122#define ICMPV6_ADM_PROHIBITED		1
123#define ICMPV6_NOT_NEIGHBOUR		2
124#define ICMPV6_ADDR_UNREACH		3
125#define ICMPV6_PORT_UNREACH		4
126#define ICMPV6_POLICY_FAIL		5
127#define ICMPV6_REJECT_ROUTE		6
128
129/*
130 *	Codes for Time Exceeded
131 */
132#define ICMPV6_EXC_HOPLIMIT		0
133#define ICMPV6_EXC_FRAGTIME		1
134
135/*
136 *	Codes for Parameter Problem
137 */
138#define ICMPV6_HDR_FIELD		0
139#define ICMPV6_UNK_NEXTHDR		1
140#define ICMPV6_UNK_OPTION		2
141#define ICMPV6_HDR_INCOMP		3
142
143/* Codes for EXT_ECHO (PROBE) */
144#define ICMPV6_EXT_ECHO_REQUEST		160
145#define ICMPV6_EXT_ECHO_REPLY		161
146/*
147 *	constants for (set|get)sockopt
148 */
149
150#define ICMPV6_FILTER			1
151
152/*
153 *	ICMPV6 filter
154 */
155
156#define ICMPV6_FILTER_BLOCK		1
157#define ICMPV6_FILTER_PASS		2
158#define ICMPV6_FILTER_BLOCKOTHERS	3
159#define ICMPV6_FILTER_PASSONLY		4
160
161struct icmp6_filter {
162	__u32		data[8];
163};
164
165/*
166 *	Definitions for MLDv2
167 */
168#define MLD2_MODE_IS_INCLUDE	1
169#define MLD2_MODE_IS_EXCLUDE	2
170#define MLD2_CHANGE_TO_INCLUDE	3
171#define MLD2_CHANGE_TO_EXCLUDE	4
172#define MLD2_ALLOW_NEW_SOURCES	5
173#define MLD2_BLOCK_OLD_SOURCES	6
174
175#define MLD2_ALL_MCR_INIT { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x16 } } }
176
177
178#endif /* _UAPI_LINUX_ICMPV6_H */
179