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/* Copyright (C) 1991,92,93,94,95,96,97,2000 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

#ifndef _NETINET_ICMP6_H

#define _NETINET_ICMP6_H 1

#include <inttypes.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 data[8];

  };

struct icmp6_hdr

  {

    uint8_t     icmp6_type;   /* type field */

    uint8_t     icmp6_code;   /* code field */

    uint16_t    icmp6_cksum;  /* checksum field */

    union

      {

        uint32_t  icmp6_un_data32[1]; /* type-specific field */

        uint16_t  icmp6_un_data16[2]; /* type-specific field */

        uint8_t   icmp6_un_data8[4];  /* type-specific field */

      } 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]  /* parameter prob */

#define icmp6_mtu       icmp6_data32[0]  /* packet too big */

#define icmp6_id        icmp6_data16[0]  /* echo request/reply */

#define icmp6_seq       icmp6_data16[1]  /* echo request/reply */

#define icmp6_maxdelay  icmp6_data16[0]  /* mcast group membership */

#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    /* all informational messages */

#define ICMP6_ECHO_REQUEST          128

#define ICMP6_ECHO_REPLY            129

#define ICMP6_MEMBERSHIP_QUERY      130

#define ICMP6_MEMBERSHIP_REPORT     131

#define ICMP6_MEMBERSHIP_REDUCTION  132

#define ICMP6_DST_UNREACH_NOROUTE     0 /* no route to destination */

#define ICMP6_DST_UNREACH_ADMIN       1 /* communication with destination */

                                        /* administratively prohibited */

#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor */

#define ICMP6_DST_UNREACH_ADDR        3 /* address unreachable */

#define ICMP6_DST_UNREACH_NOPORT      4 /* bad port */

#define ICMP6_TIME_EXCEED_TRANSIT     0 /* Hop Limit == 0 in transit */

#define ICMP6_TIME_EXCEED_REASSEMBLY  1 /* Reassembly time out */

#define ICMP6_PARAMPROB_HEADER        0 /* erroneous header field */

#define ICMP6_PARAMPROB_NEXTHEADER    1 /* unrecognized Next Header */

#define ICMP6_PARAMPROB_OPTION        2 /* unrecognized IPv6 option */

#define ICMP6_FILTER_WILLPASS(type, filterp) \

        ((((filterp)->data[(type) >> 5]) & (1 << ((type) & 31))) == 0)

#define ICMP6_FILTER_WILLBLOCK(type, filterp) \

        ((((filterp)->data[(type) >> 5]) & (1 << ((type) & 31))) != 0)

#define ICMP6_FILTER_SETPASS(type, filterp) \

        ((((filterp)->data[(type) >> 5]) &= ~(1 << ((type) & 31))))

#define ICMP6_FILTER_SETBLOCK(type, filterp) \

        ((((filterp)->data[(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      /* router solicitation */

  {

    struct icmp6_hdr  nd_rs_hdr;

    /* could be followed by options */

  };

#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       /* router advertisement */

  {

    struct icmp6_hdr  nd_ra_hdr;

    uint32_t   nd_ra_reachable;   /* reachable time */

    uint32_t   nd_ra_retransmit;  /* retransmit timer */

    /* could be followed by options */

  };

#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    /* neighbor solicitation */

  {

    struct icmp6_hdr  nd_ns_hdr;

    struct in6_addr   nd_ns_target; /* target address */

    /* could be followed by options */

  };

#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     /* neighbor advertisement */

  {

    struct icmp6_hdr  nd_na_hdr;

    struct in6_addr   nd_na_target; /* target address */

    /* could be followed by options */

  };

#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   /* BYTE_ORDER == LITTLE_ENDIAN */

#define ND_NA_FLAG_ROUTER        0x00000080

#define ND_NA_FLAG_SOLICITED     0x00000040

#define ND_NA_FLAG_OVERRIDE      0x00000020

#endif

struct nd_redirect            /* redirect */

  {

    struct icmp6_hdr  nd_rd_hdr;

    struct in6_addr   nd_rd_target; /* target address */

    struct in6_addr   nd_rd_dst;    /* destination address */

    /* could be followed by options */

  };

#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             /* Neighbor discovery option header */

  {

    uint8_t  nd_opt_type;

    uint8_t  nd_opt_len;        /* in units of 8 octets */

    /* followed by option specific data */

  };

#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     /* prefix information */

  {

    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          /* redirected header */

  {

    uint8_t   nd_opt_rh_type;

    uint8_t   nd_opt_rh_len;

    uint16_t  nd_opt_rh_reserved1;

    uint32_t  nd_opt_rh_reserved2;

    /* followed by IP header and data */

  };

struct nd_opt_mtu             /* MTU option */

  {

    uint8_t   nd_opt_mtu_type;

    uint8_t   nd_opt_mtu_len;

    uint16_t  nd_opt_mtu_reserved;

    uint32_t  nd_opt_mtu_mtu;

  };

/* Mobile IPv6 extension: Advertisement Interval.  */

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;

  };

/* Mobile IPv6 extension: Home Agent Info.  */

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;

    int16_t   nd_opt_home_agent_info_preference;

    uint16_t  nd_opt_home_agent_info_lifetime;

  };

#endif /* netinet/icmpv6.h */