The C and C++ Include Header Files

/usr/include/linux/icmpv6.h


$ cat -n /usr/include/linux/icmpv6.h

     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_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	
   161	struct 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 /* _LINUX_ICMPV6_H */