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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 
8 struct 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_router		icmp6_dataun.u_nd_advt.router
72 #define icmp6_solicited		icmp6_dataun.u_nd_advt.solicited
73 #define icmp6_override		icmp6_dataun.u_nd_advt.override
74 #define icmp6_ndiscreserved	icmp6_dataun.u_nd_advt.reserved
75 #define icmp6_hop_limit		icmp6_dataun.u_nd_ra.hop_limit
76 #define icmp6_addrconf_managed	icmp6_dataun.u_nd_ra.managed
77 #define icmp6_addrconf_other	icmp6_dataun.u_nd_ra.other
78 #define icmp6_rt_lifetime	icmp6_dataun.u_nd_ra.rt_lifetime
79 #define icmp6_router_pref	icmp6_dataun.u_nd_ra.router_pref
80 };
81 
82 
83 #define ICMPV6_ROUTER_PREF_LOW		0x3
84 #define ICMPV6_ROUTER_PREF_MEDIUM	0x0
85 #define ICMPV6_ROUTER_PREF_HIGH		0x1
86 #define ICMPV6_ROUTER_PREF_INVALID	0x2
87 
88 #define ICMPV6_DEST_UNREACH		1
89 #define ICMPV6_PKT_TOOBIG		2
90 #define ICMPV6_TIME_EXCEED		3
91 #define ICMPV6_PARAMPROB		4
92 
93 #define ICMPV6_INFOMSG_MASK		0x80
94 
95 #define ICMPV6_ECHO_REQUEST		128
96 #define ICMPV6_ECHO_REPLY		129
97 #define ICMPV6_MGM_QUERY		130
98 #define ICMPV6_MGM_REPORT       	131
99 #define ICMPV6_MGM_REDUCTION    	132
100 
101 #define ICMPV6_NI_QUERY			139
102 #define ICMPV6_NI_REPLY			140
103 
104 #define ICMPV6_MLD2_REPORT		143
105 
106 #define ICMPV6_DHAAD_REQUEST		144
107 #define ICMPV6_DHAAD_REPLY		145
108 #define ICMPV6_MOBILE_PREFIX_SOL	146
109 #define ICMPV6_MOBILE_PREFIX_ADV	147
110 
111 /*
112  *	Codes for Destination Unreachable
113  */
114 #define ICMPV6_NOROUTE			0
115 #define ICMPV6_ADM_PROHIBITED		1
116 #define ICMPV6_NOT_NEIGHBOUR		2
117 #define ICMPV6_ADDR_UNREACH		3
118 #define ICMPV6_PORT_UNREACH		4
119 #define ICMPV6_POLICY_FAIL		5
120 #define ICMPV6_REJECT_ROUTE		6
121 
122 /*
123  *	Codes for Time Exceeded
124  */
125 #define ICMPV6_EXC_HOPLIMIT		0
126 #define ICMPV6_EXC_FRAGTIME		1
127 
128 /*
129  *	Codes for Parameter Problem
130  */
131 #define ICMPV6_HDR_FIELD		0
132 #define ICMPV6_UNK_NEXTHDR		1
133 #define ICMPV6_UNK_OPTION		2
134 
135 /*
136  *	constants for (set|get)sockopt
137  */
138 
139 #define ICMPV6_FILTER			1
140 
141 /*
142  *	ICMPV6 filter
143  */
144 
145 #define ICMPV6_FILTER_BLOCK		1
146 #define ICMPV6_FILTER_PASS		2
147 #define ICMPV6_FILTER_BLOCKOTHERS	3
148 #define ICMPV6_FILTER_PASSONLY		4
149 
150 struct icmp6_filter {
151 	__u32		data[8];
152 };
153 
154 /*
155  *	Definitions for MLDv2
156  */
157 #define MLD2_MODE_IS_INCLUDE	1
158 #define MLD2_MODE_IS_EXCLUDE	2
159 #define MLD2_CHANGE_TO_INCLUDE	3
160 #define MLD2_CHANGE_TO_EXCLUDE	4
161 #define MLD2_ALLOW_NEW_SOURCES	5
162 #define MLD2_BLOCK_OLD_SOURCES	6
163 
164 #define MLD2_ALL_MCR_INIT { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x16 } } }
165 
166 
167 #endif /* _LINUX_ICMPV6_H */
168