text: #ifndef _NETINET_ICMP6_H
  #define _NETINET_ICMP6_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include <stdint.h>
  #include <string.h>
  #include <sys/types.h>
  #include <netinet/in.h>
  
  #define ICMP6_FILTER 1
  
  #define ICMP6_FILTER_BLOCK		1
  #define ICMP6_FILTER_PASS		2
  #define ICMP6_FILTER_BLOCKOTHERS	3
  #define ICMP6_FILTER_PASSONLY		4
  
  struct icmp6_filter {
  	uint32_t icmp6_filt[8];
  };
  
  struct icmp6_hdr {
  	uint8_t     icmp6_type;
  	uint8_t     icmp6_code;
  	uint16_t    icmp6_cksum;
  	union {
  		uint32_t  icmp6_un_data32[1];
  		uint16_t  icmp6_un_data16[2];
  		uint8_t   icmp6_un_data8[4];
  	} icmp6_dataun;
  };
  
  #define icmp6_data32    icmp6_dataun.icmp6_un_data32
  #define icmp6_data16    icmp6_dataun.icmp6_un_data16
  #define icmp6_data8     icmp6_dataun.icmp6_un_data8
  #define icmp6_pptr      icmp6_data32[0]
  #define icmp6_mtu       icmp6_data32[0]
  #define icmp6_id        icmp6_data16[0]
  #define icmp6_seq       icmp6_data16[1]
  #define icmp6_maxdelay  icmp6_data16[0]
  
  #define ICMP6_DST_UNREACH             1
  #define ICMP6_PACKET_TOO_BIG          2
  #define ICMP6_TIME_EXCEEDED           3
  #define ICMP6_PARAM_PROB              4
  
  #define ICMP6_INFOMSG_MASK  0x80
  
  #define ICMP6_ECHO_REQUEST          128
  #define ICMP6_ECHO_REPLY            129
  #define MLD_LISTENER_QUERY          130
  #define MLD_LISTENER_REPORT         131
  #define MLD_LISTENER_REDUCTION      132
  
  #define ICMP6_DST_UNREACH_NOROUTE     0
  #define ICMP6_DST_UNREACH_ADMIN       1
  #define ICMP6_DST_UNREACH_BEYONDSCOPE 2
  #define ICMP6_DST_UNREACH_ADDR        3
  #define ICMP6_DST_UNREACH_NOPORT      4
  
  #define ICMP6_TIME_EXCEED_TRANSIT     0
  #define ICMP6_TIME_EXCEED_REASSEMBLY  1
  
  #define ICMP6_PARAMPROB_HEADER        0
  #define ICMP6_PARAMPROB_NEXTHEADER    1
  #define ICMP6_PARAMPROB_OPTION        2
  
  #define ICMP6_FILTER_WILLPASS(type, filterp) \
  	((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
  
  #define ICMP6_FILTER_WILLBLOCK(type, filterp) \
  	((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
  
  #define ICMP6_FILTER_SETPASS(type, filterp) \
  	((((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31))))
  
  #define ICMP6_FILTER_SETBLOCK(type, filterp) \
  	((((filterp)->icmp6_filt[(type) >> 5]) |=  (1 << ((type) & 31))))
  
  #define ICMP6_FILTER_SETPASSALL(filterp) \
  	memset (filterp, 0, sizeof (struct icmp6_filter));
  
  #define ICMP6_FILTER_SETBLOCKALL(filterp) \
  	memset (filterp, 0xFF, sizeof (struct icmp6_filter));
  
  #define ND_ROUTER_SOLICIT           133
  #define ND_ROUTER_ADVERT            134
  #define ND_NEIGHBOR_SOLICIT         135
  #define ND_NEIGHBOR_ADVERT          136
  #define ND_REDIRECT                 137
  
  struct nd_router_solicit {
  	struct icmp6_hdr  nd_rs_hdr;
  };
  
  #define nd_rs_type               nd_rs_hdr.icmp6_type
  #define nd_rs_code               nd_rs_hdr.icmp6_code
  #define nd_rs_cksum              nd_rs_hdr.icmp6_cksum
  #define nd_rs_reserved           nd_rs_hdr.icmp6_data32[0]
  
  struct nd_router_advert {
  	struct icmp6_hdr  nd_ra_hdr;
  	uint32_t   nd_ra_reachable;
  	uint32_t   nd_ra_retransmit;
  };
  
  #define nd_ra_type               nd_ra_hdr.icmp6_type
  #define nd_ra_code               nd_ra_hdr.icmp6_code
  #define nd_ra_cksum              nd_ra_hdr.icmp6_cksum
  #define nd_ra_curhoplimit        nd_ra_hdr.icmp6_data8[0]
  #define nd_ra_flags_reserved     nd_ra_hdr.icmp6_data8[1]
  #define ND_RA_FLAG_MANAGED       0x80
  #define ND_RA_FLAG_OTHER         0x40
  #define ND_RA_FLAG_HOME_AGENT    0x20
  #define nd_ra_router_lifetime    nd_ra_hdr.icmp6_data16[1]
  
  struct nd_neighbor_solicit {
  	struct icmp6_hdr  nd_ns_hdr;
  	struct in6_addr   nd_ns_target;
  };
  
  #define nd_ns_type               nd_ns_hdr.icmp6_type
  #define nd_ns_code               nd_ns_hdr.icmp6_code
  #define nd_ns_cksum              nd_ns_hdr.icmp6_cksum
  #define nd_ns_reserved           nd_ns_hdr.icmp6_data32[0]
  
  struct nd_neighbor_advert {
  	struct icmp6_hdr  nd_na_hdr;
  	struct in6_addr   nd_na_target;
  };
  
  #define nd_na_type               nd_na_hdr.icmp6_type
  #define nd_na_code               nd_na_hdr.icmp6_code
  #define nd_na_cksum              nd_na_hdr.icmp6_cksum
  #define nd_na_flags_reserved     nd_na_hdr.icmp6_data32[0]
  #if     __BYTE_ORDER == __BIG_ENDIAN
  #define ND_NA_FLAG_ROUTER        0x80000000
  #define ND_NA_FLAG_SOLICITED     0x40000000
  #define ND_NA_FLAG_OVERRIDE      0x20000000
  #else
  #define ND_NA_FLAG_ROUTER        0x00000080
  #define ND_NA_FLAG_SOLICITED     0x00000040
  #define ND_NA_FLAG_OVERRIDE      0x00000020
  #endif
  
  struct nd_redirect {
  	struct icmp6_hdr  nd_rd_hdr;
  	struct in6_addr   nd_rd_target;
  	struct in6_addr   nd_rd_dst;
  };
  
  #define nd_rd_type               nd_rd_hdr.icmp6_type
  #define nd_rd_code               nd_rd_hdr.icmp6_code
  #define nd_rd_cksum              nd_rd_hdr.icmp6_cksum
  #define nd_rd_reserved           nd_rd_hdr.icmp6_data32[0]
  
  struct nd_opt_hdr {
  	uint8_t  nd_opt_type;
  	uint8_t  nd_opt_len;
  };
  
  #define ND_OPT_SOURCE_LINKADDR		1
  #define ND_OPT_TARGET_LINKADDR		2
  #define ND_OPT_PREFIX_INFORMATION	3
  #define ND_OPT_REDIRECTED_HEADER	4
  #define ND_OPT_MTU			5
  #define ND_OPT_RTR_ADV_INTERVAL		7
  #define ND_OPT_HOME_AGENT_INFO		8
  
  struct nd_opt_prefix_info {
  	uint8_t   nd_opt_pi_type;
  	uint8_t   nd_opt_pi_len;
  	uint8_t   nd_opt_pi_prefix_len;
  	uint8_t   nd_opt_pi_flags_reserved;
  	uint32_t  nd_opt_pi_valid_time;
  	uint32_t  nd_opt_pi_preferred_time;
  	uint32_t  nd_opt_pi_reserved2;
  	struct in6_addr  nd_opt_pi_prefix;
  };
  
  #define ND_OPT_PI_FLAG_ONLINK	0x80
  #define ND_OPT_PI_FLAG_AUTO	0x40
  #define ND_OPT_PI_FLAG_RADDR	0x20
  
  struct nd_opt_rd_hdr {
  	uint8_t   nd_opt_rh_type;
  	uint8_t   nd_opt_rh_len;
  	uint16_t  nd_opt_rh_reserved1;
  	uint32_t  nd_opt_rh_reserved2;
  };
  
  struct nd_opt_mtu {
  	uint8_t   nd_opt_mtu_type;
  	uint8_t   nd_opt_mtu_len;
  	uint16_t  nd_opt_mtu_reserved;
  	uint32_t  nd_opt_mtu_mtu;
  };
  
  struct mld_hdr {
  	struct icmp6_hdr    mld_icmp6_hdr;
  	struct in6_addr     mld_addr;
  };
  
  #define mld_type        mld_icmp6_hdr.icmp6_type
  #define mld_code        mld_icmp6_hdr.icmp6_code
  #define mld_cksum       mld_icmp6_hdr.icmp6_cksum
  #define mld_maxdelay    mld_icmp6_hdr.icmp6_data16[0]
  #define mld_reserved    mld_icmp6_hdr.icmp6_data16[1]
  
  #define ICMP6_ROUTER_RENUMBERING    138
  
  struct icmp6_router_renum {
  	struct icmp6_hdr    rr_hdr;
  	uint8_t             rr_segnum;
  	uint8_t             rr_flags;
  	uint16_t            rr_maxdelay;
  	uint32_t            rr_reserved;
  };
  
  #define rr_type		rr_hdr.icmp6_type
  #define rr_code         rr_hdr.icmp6_code
  #define rr_cksum        rr_hdr.icmp6_cksum
  #define rr_seqnum       rr_hdr.icmp6_data32[0]
  
  #define ICMP6_RR_FLAGS_TEST             0x80
  #define ICMP6_RR_FLAGS_REQRESULT        0x40
  #define ICMP6_RR_FLAGS_FORCEAPPLY       0x20
  #define ICMP6_RR_FLAGS_SPECSITE         0x10
  #define ICMP6_RR_FLAGS_PREVDONE         0x08
  
  struct rr_pco_match {
  	uint8_t             rpm_code;
  	uint8_t             rpm_len;
  	uint8_t             rpm_ordinal;
  	uint8_t             rpm_matchlen;
  	uint8_t             rpm_minlen;
  	uint8_t             rpm_maxlen;
  	uint16_t            rpm_reserved;
  	struct in6_addr     rpm_prefix;
  };
  
  #define RPM_PCO_ADD             1
  #define RPM_PCO_CHANGE          2
  #define RPM_PCO_SETGLOBAL       3
  
  struct rr_pco_use {
  	uint8_t             rpu_uselen;
  	uint8_t             rpu_keeplen;
  	uint8_t             rpu_ramask;
  	uint8_t             rpu_raflags;
  	uint32_t            rpu_vltime;
  	uint32_t            rpu_pltime;
  	uint32_t            rpu_flags;
  	struct in6_addr     rpu_prefix;
  };
  
  #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x20
  #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x10
  
  #if __BYTE_ORDER == __BIG_ENDIAN
  #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
  #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
  #else
  #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
  #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
  #endif
  
  struct rr_result {
  	uint16_t            rrr_flags;
  	uint8_t             rrr_ordinal;
  	uint8_t             rrr_matchedlen;
  	uint32_t            rrr_ifid;
  	struct in6_addr     rrr_prefix;
  };
  
  #if __BYTE_ORDER == __BIG_ENDIAN
  #define ICMP6_RR_RESULT_FLAGS_OOB       0x0002
  #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
  #else
  #define ICMP6_RR_RESULT_FLAGS_OOB       0x0200
  #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0100
  #endif
  
  struct nd_opt_adv_interval {
  	uint8_t   nd_opt_adv_interval_type;
  	uint8_t   nd_opt_adv_interval_len;
  	uint16_t  nd_opt_adv_interval_reserved;
  	uint32_t  nd_opt_adv_interval_ival;
  };
  
  struct nd_opt_home_agent_info {
  	uint8_t   nd_opt_home_agent_info_type;
  	uint8_t   nd_opt_home_agent_info_len;
  	uint16_t  nd_opt_home_agent_info_reserved;
  	uint16_t  nd_opt_home_agent_info_preference;
  	uint16_t  nd_opt_home_agent_info_lifetime;
  };
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif