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/* Copyright (C) 1991-1999, 2000, 2001 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_IN_H

#define _NETINET_IN_H   1

#include <features.h>

#include <stdint.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_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 */

  };

/* IPv6 multicast request.  */

struct ipv6_mreq

  {

    /* IPv6 multicast address of group */

    struct in6_addr ipv6mr_multiaddr;

    /* local interface */

    unsigned int ipv6mr_interface;

  };

/* 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>

#ifndef __OPTIMIZE__

#define __OPTIMIZE__

#endif

#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 */

  };

__END_DECLS

#endif  /* netinet/in.h */