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#ifndef _LINUX_ICMPV6_H
#define _LINUX_ICMPV6_H
 
#include <asm/byteorder.h>
 
struct icmp6hdr {
 
	__u8		icmp6_type;
	__u8		icmp6_code;
	__u16		icmp6_cksum;
 
 
	union {
		__u32			un_data32[1];
		__u16			un_data16[2];
		__u8			un_data8[4];
 
		struct icmpv6_echo {
			__u16		identifier;
			__u16		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:6,
					other:1,
					managed:1;
 
#elif defined(__BIG_ENDIAN_BITFIELD)
			__u8		managed:1,
					other:1,
					reserved:6;
#else
#error	"Please fix <asm/byteorder.h>"
#endif
			__u16		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 ICMPV6_DEST_UNREACH		1
#define ICMPV6_PKT_TOOBIG		2
#define ICMPV6_TIME_EXCEED		3
#define ICMPV6_PARAMPROB		4
 
#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
 
/* 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
 
/* this must be an IANA-assigned value; 206 for testing only */
#define ICMPV6_MLD2_REPORT		206
#define MLD2_ALL_MCR_INIT { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x16 } } }
 
/*
 *	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
 
/*
 *	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];
};
 
#ifdef __KERNEL__
 
#include <linux/netdevice.h>
#include <linux/skbuff.h>
 
 
extern void				icmpv6_send(struct sk_buff *skb,
						    int type, int code,
						    __u32 info, 
						    struct net_device *dev);
 
extern int				icmpv6_init(struct net_proto_family *ops);
extern int				icmpv6_err_convert(int type, int code,
							   int *err);
extern void				icmpv6_cleanup(void);
extern void				icmpv6_param_prob(struct sk_buff *skb,
							  int code, int pos);
#endif
 
#endif