#ifndef _NETINET_IN_H
#define _NETINET_IN_H   1

#include <features.h>
#include <stdint.h>
#include <sys/socket.h>
#include <bits/types.h>


__BEGIN_DECLS

/* Standard well-defined IP protocols.  */
enum
  {
    IPPROTO_IP = 0,    /* Dummy protocol for TCP.  */
#define IPPROTO_IP      IPPROTO_IP
    IPPROTO_HOPOPTS = 0,   /* IPv6 Hop-by-Hop options.  */
#define IPPROTO_HOPOPTS     IPPROTO_HOPOPTS
    IPPROTO_ICMP = 1,      /* Internet Control Message Protocol.  */
#define IPPROTO_ICMP        IPPROTO_ICMP
    IPPROTO_IGMP = 2,      /* Internet Group Management Protocol. */
#define IPPROTO_IGMP        IPPROTO_IGMP
    IPPROTO_IPIP = 4,      /* IPIP tunnels (older KA9Q tunnels use 94).  */
#define IPPROTO_IPIP        IPPROTO_IPIP
    IPPROTO_TCP = 6,       /* Transmission Control Protocol.  */
#define IPPROTO_TCP     IPPROTO_TCP
    IPPROTO_EGP = 8,       /* Exterior Gateway Protocol.  */
#define IPPROTO_EGP     IPPROTO_EGP
    IPPROTO_PUP = 12,      /* PUP protocol.  */
#define IPPROTO_PUP     IPPROTO_PUP
    IPPROTO_UDP = 17,      /* User Datagram Protocol.  */
#define IPPROTO_UDP     IPPROTO_UDP
    IPPROTO_IDP = 22,      /* XNS IDP protocol.  */
#define IPPROTO_IDP     IPPROTO_IDP
    IPPROTO_TP = 29,       /* SO Transport Protocol Class 4.  */
#define IPPROTO_TP      IPPROTO_TP
    IPPROTO_IPV6 = 41,     /* IPv6 header.  */
#define IPPROTO_IPV6        IPPROTO_IPV6
    IPPROTO_ROUTING = 43,  /* IPv6 routing header.  */
#define IPPROTO_ROUTING     IPPROTO_ROUTING
    IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header.  */
#define IPPROTO_FRAGMENT    IPPROTO_FRAGMENT
    IPPROTO_RSVP = 46,     /* Reservation Protocol.  */
#define IPPROTO_RSVP        IPPROTO_RSVP
    IPPROTO_GRE = 47,      /* General Routing Encapsulation.  */
#define IPPROTO_GRE     IPPROTO_GRE
    IPPROTO_ESP = 50,      /* encapsulating security payload.  */
#define IPPROTO_ESP     IPPROTO_ESP
    IPPROTO_AH = 51,       /* authentication header.  */
#define IPPROTO_AH      IPPROTO_AH
    IPPROTO_ICMPV6 = 58,   /* ICMPv6.  */
#define IPPROTO_ICMPV6      IPPROTO_ICMPV6
    IPPROTO_NONE = 59,     /* IPv6 no next header.  */
#define IPPROTO_NONE        IPPROTO_NONE
    IPPROTO_DSTOPTS = 60,  /* IPv6 destination options.  */
#define IPPROTO_DSTOPTS     IPPROTO_DSTOPTS
    IPPROTO_MTP = 92,      /* Multicast Transport Protocol.  */
#define IPPROTO_MTP     IPPROTO_MTP
    IPPROTO_ENCAP = 98,    /* Encapsulation Header.  */
#define IPPROTO_ENCAP       IPPROTO_ENCAP
    IPPROTO_PIM = 103,     /* Protocol Independent Multicast.  */
#define IPPROTO_PIM     IPPROTO_PIM
    IPPROTO_COMP = 108,    /* Compression Header Protocol.  */
#define IPPROTO_COMP        IPPROTO_COMP
    IPPROTO_SCTP = 132,    /* Stream Control Transmission Protocol.  */
#define IPPROTO_SCTP        IPPROTO_SCTP
    IPPROTO_RAW = 255,     /* Raw IP packets.  */
#define IPPROTO_RAW     IPPROTO_RAW
    IPPROTO_MAX
  };


/* Type to represent a port.  */
typedef uint16_t in_port_t;

/* Standard well-known ports.  */
enum
  {
    IPPORT_ECHO = 7,        /* Echo service.  */
    IPPORT_DISCARD = 9,     /* Discard transmissions service.  */
    IPPORT_SYSTAT = 11,     /* System status service.  */
    IPPORT_DAYTIME = 13,    /* Time of day service.  */
    IPPORT_NETSTAT = 15,    /* Network status service.  */
    IPPORT_FTP = 21,        /* File Transfer Protocol.  */
    IPPORT_TELNET = 23,     /* Telnet protocol.  */
    IPPORT_SMTP = 25,       /* Simple Mail Transfer Protocol.  */
    IPPORT_TIMESERVER = 37, /* Timeserver service.  */
    IPPORT_NAMESERVER = 42, /* Domain Name Service.  */
    IPPORT_WHOIS = 43,      /* Internet Whois service.  */
    IPPORT_MTP = 57,

    IPPORT_TFTP = 69,       /* Trivial File Transfer Protocol.  */
    IPPORT_RJE = 77,
    IPPORT_FINGER = 79,     /* Finger service.  */
    IPPORT_TTYLINK = 87,
    IPPORT_SUPDUP = 95,     /* SUPDUP protocol.  */


    IPPORT_EXECSERVER = 512,    /* execd service.  */
    IPPORT_LOGINSERVER = 513,   /* rlogind service.  */
    IPPORT_CMDSERVER = 514,
    IPPORT_EFSSERVER = 520,

    /* UDP ports.  */
    IPPORT_BIFFUDP = 512,
    IPPORT_WHOSERVER = 513,
    IPPORT_ROUTESERVER = 520,

    /* Ports less than this value are reserved for privileged processes.  */
    IPPORT_RESERVED = 1024,

    /* Ports greater this value are reserved for (non-privileged) servers.  */
    IPPORT_USERRESERVED = 5000
  };


/* Internet address.  */
typedef uint32_t in_addr_t;
struct in_addr
  {
    in_addr_t s_addr;
  };


/* Definitions of the bits in an Internet address integer.

   On subnets, host and network parts are found according to
   the subnet mask, not these masks.  */

#define IN_CLASSA(a)        ((((in_addr_t)(a)) & 0x80000000) == 0)
#define IN_CLASSA_NET       0xff000000
#define IN_CLASSA_NSHIFT    24
#define IN_CLASSA_HOST      (0xffffffff & ~IN_CLASSA_NET)
#define IN_CLASSA_MAX       128

#define IN_CLASSB(a)        ((((in_addr_t)(a)) & 0xc0000000) == 0x80000000)
#define IN_CLASSB_NET       0xffff0000
#define IN_CLASSB_NSHIFT    16
#define IN_CLASSB_HOST      (0xffffffff & ~IN_CLASSB_NET)
#define IN_CLASSB_MAX       65536

#define IN_CLASSC(a)        ((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000)
#define IN_CLASSC_NET       0xffffff00
#define IN_CLASSC_NSHIFT    8
#define IN_CLASSC_HOST      (0xffffffff & ~IN_CLASSC_NET)

#define IN_CLASSD(a)        ((((in_addr_t)(a)) & 0xf0000000) == 0xe0000000)
#define IN_MULTICAST(a)     IN_CLASSD(a)

#define IN_EXPERIMENTAL(a)  ((((in_addr_t)(a)) & 0xe0000000) == 0xe0000000)
#define IN_BADCLASS(a)      ((((in_addr_t)(a)) & 0xf0000000) == 0xf0000000)

/* Address to accept any incoming messages.  */
#define INADDR_ANY      ((in_addr_t) 0x00000000)
/* Address to send to all hosts.  */
#define INADDR_BROADCAST    ((in_addr_t) 0xffffffff)
/* Address indicating an error return.  */
#define INADDR_NONE     ((in_addr_t) 0xffffffff)

/* Network number for local host loopback.  */
#define IN_LOOPBACKNET      127
/* Address to loopback in software to local host.  */
#ifndef INADDR_LOOPBACK
# define INADDR_LOOPBACK    ((in_addr_t) 0x7f000001) /* Inet 127.0.0.1.  */
#endif

/* Defines for Multicast INADDR.  */
#define INADDR_UNSPEC_GROUP ((in_addr_t) 0xe0000000) /* 224.0.0.0 */
#define INADDR_ALLHOSTS_GROUP   ((in_addr_t) 0xe0000001) /* 224.0.0.1 */
#define INADDR_ALLRTRS_GROUP    ((in_addr_t) 0xe0000002) /* 224.0.0.2 */
#define INADDR_MAX_LOCAL_GROUP  ((in_addr_t) 0xe00000ff) /* 224.0.0.255 */


/* IPv6 address */
struct in6_addr
  {
    union
      {
    uint8_t u6_addr8[16];
    uint16_t u6_addr16[8];
    uint32_t u6_addr32[4];
      } in6_u;
#define s6_addr         in6_u.u6_addr8
#define s6_addr16       in6_u.u6_addr16
#define s6_addr32       in6_u.u6_addr32
  };

extern const struct in6_addr in6addr_any;        /* :: */
extern const struct in6_addr in6addr_loopback;   /* ::1 */
#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }

#define INET_ADDRSTRLEN 16
#define INET6_ADDRSTRLEN 46

/* Get the definition of the macro to define the common sockaddr members.  */
#include <bits/socket.h>


/* Structure describing an Internet socket address.  */
struct sockaddr_in
  {
    __SOCKADDR_COMMON (sin_);
    in_port_t sin_port;         /* Port number.  */
    struct in_addr sin_addr;        /* Internet address.  */

    /* Pad to size of `struct sockaddr'.  */
    unsigned char sin_zero[sizeof (struct sockaddr) -
               __SOCKADDR_COMMON_SIZE -
               sizeof (in_port_t) -
               sizeof (struct in_addr)];
  };

/* Ditto, for IPv6.  */
struct sockaddr_in6
  {
    __SOCKADDR_COMMON (sin6_);
    in_port_t sin6_port;    /* Transport layer port # */
    uint32_t sin6_flowinfo; /* IPv6 flow information */
    struct in6_addr sin6_addr;  /* IPv6 address */
    uint32_t sin6_scope_id; /* IPv6 scope-id */
  };


/* IPv4 multicast request.  */
struct ip_mreq
  {
    /* IP multicast address of group.  */
    struct in_addr imr_multiaddr;

    /* Local IP address of interface.  */
    struct in_addr imr_interface;
  };

struct ip_mreq_source
  {
    /* IP multicast address of group.  */
    struct in_addr imr_multiaddr;

    /* IP address of source.  */
    struct in_addr imr_interface;

    /* IP address of interface.  */
    struct in_addr imr_sourceaddr;
  };

/* Likewise, for IPv6.  */
struct ipv6_mreq
  {
    /* IPv6 multicast address of group */
    struct in6_addr ipv6mr_multiaddr;

    /* local interface */
    unsigned int ipv6mr_interface;
  };


/* Multicast group request.  */
struct group_req
  {
    /* Interface index.  */
    uint32_t gr_interface;

    /* Group address.  */
    struct sockaddr_storage gr_group;
  };

struct group_source_req
  {
    /* Interface index.  */
    uint32_t gsr_interface;

    /* Group address.  */
    struct sockaddr_storage gsr_group;

    /* Source address.  */
    struct sockaddr_storage gsr_source;
  };


/* Full-state filter operations.  */
struct ip_msfilter
  {
    /* IP multicast address of group.  */
    struct in_addr imsf_multiaddr;

    /* Local IP address of interface.  */
    struct in_addr imsf_interface;

    /* Filter mode.  */
    uint32_t imsf_fmode;

    /* Number of source addresses.  */
    uint32_t imsf_numsrc;
    /* Source addresses.  */
    struct in_addr imsf_slist[1];
  };

#define IP_MSFILTER_SIZE(numsrc) (sizeof (struct ip_msfilter) \
                  - sizeof (struct in_addr)           \
                  + (numsrc) * sizeof (struct in_addr))

struct group_filter
  {
    /* Interface index.  */
    uint32_t gf_interface;

    /* Group address.  */
    struct sockaddr_storage gf_group;

    /* Filter mode.  */
    uint32_t gf_fmode;

    /* Number of source addresses.  */
    uint32_t gf_numsrc;
    /* Source addresses.  */
    struct sockaddr_storage gf_slist[1];
};

#define GROUP_FILTER_SIZE(numsrc) (sizeof (struct group_filter) \
                   - sizeof (struct sockaddr_storage)         \
                   + ((numsrc)                    \
                      * sizeof (struct sockaddr_storage)))


/* Get system-specific definitions.  */
#include <bits/in.h>

/* Functions to convert between host and network byte order.

   Please note that these functions normally take `unsigned long int' or
   `unsigned short int' values as arguments and also return them.  But
   this was a short-sighted decision since on different systems the types
   may have different representations but the values are always the same.  */

extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__));
extern uint16_t ntohs (uint16_t __netshort)
     __THROW __attribute__ ((__const__));
extern uint32_t htonl (uint32_t __hostlong)
     __THROW __attribute__ ((__const__));
extern uint16_t htons (uint16_t __hostshort)
     __THROW __attribute__ ((__const__));

#include <endian.h>

/* Get machine dependent optimized versions of byte swapping functions.  */
#include <bits/byteswap.h>

#ifdef __OPTIMIZE__
/* We can optimize calls to the conversion functions.  Either nothing has
   to be done or we are using directly the byte-swapping functions which
   often can be inlined.  */
# if __BYTE_ORDER == __BIG_ENDIAN
/* The host byte order is the same as network byte order,
   so these functions are all just identity.  */
# define ntohl(x)   (x)
# define ntohs(x)   (x)
# define htonl(x)   (x)
# define htons(x)   (x)
# else
#  if __BYTE_ORDER == __LITTLE_ENDIAN
#   define ntohl(x) __bswap_32 (x)
#   define ntohs(x) __bswap_16 (x)
#   define htonl(x) __bswap_32 (x)
#   define htons(x) __bswap_16 (x)
#  endif
# endif
#endif

#define IN6_IS_ADDR_UNSPECIFIED(a) \
    (((__const uint32_t *) (a))[0] == 0                   \
     && ((__const uint32_t *) (a))[1] == 0                    \
     && ((__const uint32_t *) (a))[2] == 0                    \
     && ((__const uint32_t *) (a))[3] == 0)

#define IN6_IS_ADDR_LOOPBACK(a) \
    (((__const uint32_t *) (a))[0] == 0                   \
     && ((__const uint32_t *) (a))[1] == 0                    \
     && ((__const uint32_t *) (a))[2] == 0                    \
     && ((__const uint32_t *) (a))[3] == htonl (1))

#define IN6_IS_ADDR_MULTICAST(a) (((__const uint8_t *) (a))[0] == 0xff)

#define IN6_IS_ADDR_LINKLOCAL(a) \
    ((((__const uint32_t *) (a))[0] & htonl (0xffc00000))             \
     == htonl (0xfe800000))

#define IN6_IS_ADDR_SITELOCAL(a) \
    ((((__const uint32_t *) (a))[0] & htonl (0xffc00000))             \
     == htonl (0xfec00000))

#define IN6_IS_ADDR_V4MAPPED(a) \
    ((((__const uint32_t *) (a))[0] == 0)                     \
     && (((__const uint32_t *) (a))[1] == 0)                  \
     && (((__const uint32_t *) (a))[2] == htonl (0xffff)))

#define IN6_IS_ADDR_V4COMPAT(a) \
    ((((__const uint32_t *) (a))[0] == 0)                     \
     && (((__const uint32_t *) (a))[1] == 0)                  \
     && (((__const uint32_t *) (a))[2] == 0)                  \
     && (ntohl (((__const uint32_t *) (a))[3]) > 1))

#define IN6_ARE_ADDR_EQUAL(a,b) \
    ((((__const uint32_t *) (a))[0] == ((__const uint32_t *) (b))[0])     \
     && (((__const uint32_t *) (a))[1] == ((__const uint32_t *) (b))[1])  \
     && (((__const uint32_t *) (a))[2] == ((__const uint32_t *) (b))[2])  \
     && (((__const uint32_t *) (a))[3] == ((__const uint32_t *) (b))[3]))

/* Bind socket to a privileged IP port.  */
extern int bindresvport (int __sockfd, struct sockaddr_in *__sock_in) __THROW;

/* The IPv6 version of this function.  */
extern int bindresvport6 (int __sockfd, struct sockaddr_in6 *__sock_in)
     __THROW;


#define IN6_IS_ADDR_MC_NODELOCAL(a) \
    (IN6_IS_ADDR_MULTICAST(a)                         \
     && ((((__const uint8_t *) (a))[1] & 0xf) == 0x1))

#define IN6_IS_ADDR_MC_LINKLOCAL(a) \
    (IN6_IS_ADDR_MULTICAST(a)                         \
     && ((((__const uint8_t *) (a))[1] & 0xf) == 0x2))

#define IN6_IS_ADDR_MC_SITELOCAL(a) \
    (IN6_IS_ADDR_MULTICAST(a)                         \
     && ((((__const uint8_t *) (a))[1] & 0xf) == 0x5))

#define IN6_IS_ADDR_MC_ORGLOCAL(a) \
    (IN6_IS_ADDR_MULTICAST(a)                         \
     && ((((__const uint8_t *) (a))[1] & 0xf) == 0x8))

#define IN6_IS_ADDR_MC_GLOBAL(a) \
    (IN6_IS_ADDR_MULTICAST(a)                         \
     && ((((__const uint8_t *) (a))[1] & 0xf) == 0xe))

/* IPv6 packet information.  */
struct in6_pktinfo
  {
    struct in6_addr ipi6_addr;  /* src/dst IPv6 address */
    unsigned int ipi6_ifindex;  /* send/recv interface index */
  };

/* IPv6 MTU information.  */
struct ip6_mtuinfo
  {
    struct sockaddr_in6 ip6m_addr; /* dst address including zone ID */
    uint32_t ip6m_mtu;         /* path MTU in host byte order */
  };


#ifdef __USE_GNU
/* Obsolete hop-by-hop and Destination Options Processing (RFC 2292).  */
extern int inet6_option_space (int __nbytes)
     __THROW __attribute_deprecated__;
extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp,
                  int __type) __THROW __attribute_deprecated__;
extern int inet6_option_append (struct cmsghdr *__cmsg,
                __const uint8_t *__typep, int __multx,
                int __plusy) __THROW __attribute_deprecated__;
extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen,
                    int __multx, int __plusy)
     __THROW __attribute_deprecated__;
extern int inet6_option_next (__const struct cmsghdr *__cmsg,
                  uint8_t **__tptrp)
     __THROW __attribute_deprecated__;
extern int inet6_option_find (__const struct cmsghdr *__cmsg,
                  uint8_t **__tptrp, int __type)
     __THROW __attribute_deprecated__;


/* Hop-by-Hop and Destination Options Processing (RFC 3542).  */
extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW;
extern int inet6_opt_append (void *__extbuf, socklen_t __extlen, int __offset,
                 uint8_t __type, socklen_t __len, uint8_t __align,
                 void **__databufp) __THROW;
extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset)
     __THROW;
extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val,
                  socklen_t __vallen) __THROW;
extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset,
               uint8_t *__typep, socklen_t *__lenp,
               void **__databufp) __THROW;
extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset,
               uint8_t __type, socklen_t *__lenp,
               void **__databufp) __THROW;
extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val,
                  socklen_t __vallen) __THROW;


/* Routing Header Option (RFC 3542).  */
extern socklen_t inet6_rth_space (int __type, int __segments) __THROW;
extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type,
                 int __segments) __THROW;
extern int inet6_rth_add (void *__bp, __const struct in6_addr *__addr) __THROW;
extern int inet6_rth_reverse (__const void *__in, void *__out) __THROW;
extern int inet6_rth_segments (__const void *__bp) __THROW;
extern struct in6_addr *inet6_rth_getaddr (__const void *__bp, int __index)
     __THROW;


/* Multicast source filter support.  */

/* Get IPv4 source filter.  */
extern int getipv4sourcefilter (int __s, struct in_addr __interface_addr,
                struct in_addr __group, uint32_t *__fmode,
                uint32_t *__numsrc, struct in_addr *__slist)
     __THROW;

/* Set IPv4 source filter.  */
extern int setipv4sourcefilter (int __s, struct in_addr __interface_addr,
                struct in_addr __group, uint32_t __fmode,
                uint32_t __numsrc,
                __const struct in_addr *__slist)
     __THROW;


/* Get source filter.  */
extern int getsourcefilter (int __s, uint32_t __interface_addr,
                __const struct sockaddr *__group,
                socklen_t __grouplen, uint32_t *__fmode,
                uint32_t *__numsrc,
                struct sockaddr_storage *__slist) __THROW;

/* Set source filter.  */
extern int setsourcefilter (int __s, uint32_t __interface_addr,
                __const struct sockaddr *__group,
                socklen_t __grouplen, uint32_t __fmode,
                uint32_t __numsrc,
                __const struct sockaddr_storage *__slist) __THROW;
#endif  /* use GNU */

__END_DECLS

#endif  /* netinet/in.h */