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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