/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _LINUX_ICMPV6_H

#define _LINUX_ICMPV6_H

#include <linux/types.h>

#include <asm/byteorder.h>

struct icmp6hdr {

	__u8		icmp6_type;

	__u8		icmp6_code;

	__sum16		icmp6_cksum;

	union {

		__be32			un_data32[1];

		__be16			un_data16[2];

		__u8			un_data8[4];

		struct icmpv6_echo {

			__be16		identifier;

			__be16		sequence;

		} u_echo;

                struct icmpv6_nd_advt {

#if defined(__LITTLE_ENDIAN_BITFIELD)

                        __u32		reserved:5,

                        		override:1,

                        		solicited:1,

                        		router:1,

					reserved2:24;

#elif defined(__BIG_ENDIAN_BITFIELD)

                        __u32		router:1,

					solicited:1,

                        		override:1,

                        		reserved:29;

#else

#error	"Please fix <asm/byteorder.h>"

#endif						

                } u_nd_advt;

                struct icmpv6_nd_ra {

			__u8		hop_limit;

#if defined(__LITTLE_ENDIAN_BITFIELD)

			__u8		reserved:3,

					router_pref:2,

					home_agent:1,

					other:1,

					managed:1;

#elif defined(__BIG_ENDIAN_BITFIELD)

			__u8		managed:1,

					other:1,

					home_agent:1,

					router_pref:2,

					reserved:3;

#else

#error	"Please fix <asm/byteorder.h>"

#endif

			__be16		rt_lifetime;

                } u_nd_ra;

	} icmp6_dataun;

#define icmp6_identifier	icmp6_dataun.u_echo.identifier

#define icmp6_sequence		icmp6_dataun.u_echo.sequence

#define icmp6_pointer		icmp6_dataun.un_data32[0]

#define icmp6_mtu		icmp6_dataun.un_data32[0]

#define icmp6_unused		icmp6_dataun.un_data32[0]

#define icmp6_maxdelay		icmp6_dataun.un_data16[0]

#define icmp6_router		icmp6_dataun.u_nd_advt.router

#define icmp6_solicited		icmp6_dataun.u_nd_advt.solicited

#define icmp6_override		icmp6_dataun.u_nd_advt.override

#define icmp6_ndiscreserved	icmp6_dataun.u_nd_advt.reserved

#define icmp6_hop_limit		icmp6_dataun.u_nd_ra.hop_limit

#define icmp6_addrconf_managed	icmp6_dataun.u_nd_ra.managed

#define icmp6_addrconf_other	icmp6_dataun.u_nd_ra.other

#define icmp6_rt_lifetime	icmp6_dataun.u_nd_ra.rt_lifetime

#define icmp6_router_pref	icmp6_dataun.u_nd_ra.router_pref

};

#define ICMPV6_ROUTER_PREF_LOW		0x3

#define ICMPV6_ROUTER_PREF_MEDIUM	0x0

#define ICMPV6_ROUTER_PREF_HIGH		0x1

#define ICMPV6_ROUTER_PREF_INVALID	0x2

#define ICMPV6_DEST_UNREACH		1

#define ICMPV6_PKT_TOOBIG		2

#define ICMPV6_TIME_EXCEED		3

#define ICMPV6_PARAMPROB		4

#define ICMPV6_ERRMSG_MAX       127

#define ICMPV6_INFOMSG_MASK		0x80

#define ICMPV6_ECHO_REQUEST		128

#define ICMPV6_ECHO_REPLY		129

#define ICMPV6_MGM_QUERY		130

#define ICMPV6_MGM_REPORT       	131

#define ICMPV6_MGM_REDUCTION    	132

#define ICMPV6_NI_QUERY			139

#define ICMPV6_NI_REPLY			140

#define ICMPV6_MLD2_REPORT		143

#define ICMPV6_DHAAD_REQUEST		144

#define ICMPV6_DHAAD_REPLY		145

#define ICMPV6_MOBILE_PREFIX_SOL	146

#define ICMPV6_MOBILE_PREFIX_ADV	147

#define ICMPV6_MRDISC_ADV		151

#define ICMPV6_MSG_MAX          255

/*

 *	Codes for Destination Unreachable

 */

#define ICMPV6_NOROUTE			0

#define ICMPV6_ADM_PROHIBITED		1

#define ICMPV6_NOT_NEIGHBOUR		2

#define ICMPV6_ADDR_UNREACH		3

#define ICMPV6_PORT_UNREACH		4

#define ICMPV6_POLICY_FAIL		5

#define ICMPV6_REJECT_ROUTE		6

/*

 *	Codes for Time Exceeded

 */

#define ICMPV6_EXC_HOPLIMIT		0

#define ICMPV6_EXC_FRAGTIME		1

/*

 *	Codes for Parameter Problem

 */

#define ICMPV6_HDR_FIELD		0

#define ICMPV6_UNK_NEXTHDR		1

#define ICMPV6_UNK_OPTION		2

/*

 *	constants for (set|get)sockopt

 */

#define ICMPV6_FILTER			1

/*

 *	ICMPV6 filter

 */

#define ICMPV6_FILTER_BLOCK		1

#define ICMPV6_FILTER_PASS		2

#define ICMPV6_FILTER_BLOCKOTHERS	3

#define ICMPV6_FILTER_PASSONLY		4

struct icmp6_filter {

	__u32		data[8];

};

/*

 *	Definitions for MLDv2

 */

#define MLD2_MODE_IS_INCLUDE	1

#define MLD2_MODE_IS_EXCLUDE	2

#define MLD2_CHANGE_TO_INCLUDE	3

#define MLD2_CHANGE_TO_EXCLUDE	4

#define MLD2_ALLOW_NEW_SOURCES	5

#define MLD2_BLOCK_OLD_SOURCES	6

#define MLD2_ALL_MCR_INIT { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x16 } } }

#endif /* _LINUX_ICMPV6_H */