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/* Copyright (C) 1997, 1998 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 Library General Public License as

   published by the Free Software Foundation; either version 2 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

   Library General Public License for more details.

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

   License along with the GNU C Library; see the file COPYING.LIB.  If not,

   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#ifndef _NET_IF_H

#define _NET_IF_H       1

#include <features.h>

#include <sys/types.h>

#include <sys/socket.h>

/* Standard interface flags. */

enum

  {

    IFF_UP = 0x1,               /* Interface is up.  */

#define IFF_UP IFF_UP

    IFF_BROADCAST = 0x2,        /* Broadcast address valid.  */

#define IFF_BROADCAST IFF_BROADCAST

    IFF_DEBUG = 0x4,            /* Turn on debugging.  */

#define IFF_DEBUG IFF_DEBUG

    IFF_LOOPBACK = 0x8,         /* Is a loopback net.  */

#define IFF_LOOPBACK IFF_LOOPBACK

    IFF_POINTOPOINT = 0x10,     /* Interface is point-to-point link.  */

#define IFF_POINTOPOINT IFF_POINTOPOINT

    IFF_NOTRAILERS = 0x20,      /* Avoid use of trailers.  */

#define IFF_NOTRAILERS IFF_NOTRAILERS

    IFF_RUNNING = 0x40,         /* Resources allocated.  */

#define IFF_RUNNING IFF_RUNNING

    IFF_NOARP = 0x80,           /* No address resolution protocol.  */

#define IFF_NOARP IFF_NOARP

    IFF_PROMISC = 0x100,        /* Receive all packets.  */

#define IFF_PROMISC IFF_PROMISC

    /* Not supported */

    IFF_ALLMULTI = 0x200,       /* Receive all multicast packets.  */

#define IFF_ALLMULTI IFF_ALLMULTI

    IFF_MASTER = 0x400,         /* Master of a load balancer.  */

#define IFF_MASTER IFF_MASTER

    IFF_SLAVE = 0x800,          /* Slave of a load balancer.  */

#define IFF_SLAVE IFF_SLAVE

    IFF_MULTICAST = 0x1000,     /* Supports multicast.  */

#define IFF_MULTICAST IFF_MULTICAST

    IFF_PORTSEL = 0x2000,       /* Can set media type.  */

#define IFF_PORTSEL IFF_PORTSEL

    IFF_AUTOMEDIA = 0x4000      /* Auto media select active.  */

#define IFF_AUTOMEDIA IFF_AUTOMEDIA

  };

/* The ifaddr structure contains information about one address of an

   interface.  They are maintained by the different address families,

   are allocated and attached when an address is set, and are linked

   together so all addresses for an interface can be located.  */

struct ifaddr

  {

    struct sockaddr ifa_addr;   /* Address of interface.  */

    union

      {

        struct sockaddr ifu_broadaddr;

        struct sockaddr ifu_dstaddr;

      } ifa_ifu;

    struct iface *ifa_ifp;      /* Back-pointer to interface.  */

    struct ifaddr *ifa_next;    /* Next address for interface.  */

  };

#define ifa_broadaddr   ifa_ifu.ifu_broadaddr   /* broadcast address    */

#define ifa_dstaddr     ifa_ifu.ifu_dstaddr     /* other end of link    */

/* Device mapping structure. I'd just gone off and designed a

   beautiful scheme using only loadable modules with arguments for

   driver options and along come the PCMCIA people 8)

   Ah well. The get() side of this is good for WDSETUP, and it'll be

   handy for debugging things. The set side is fine for now and being

   very small might be worth keeping for clean configuration.  */

struct ifmap

  {

    unsigned long int mem_start;

    unsigned long int mem_end;

    unsigned short int base_addr;

    unsigned char irq;

    unsigned char dma;

    unsigned char port;

    /* 3 bytes spare */

  };

/* Interface request structure used for socket ioctl's.  All interface

   ioctl's must have parameter definitions which begin with ifr_name.

   The remainder may be interface specific.  */

struct ifreq

  {

#define IFHWADDRLEN     6

#define IFNAMSIZ        16

    union

      {

        char ifrn_name[IFNAMSIZ];       /* Interface name, e.g. "en0".  */

      } ifr_ifrn;

    union

      {

        struct sockaddr ifru_addr;

        struct sockaddr ifru_dstaddr;

        struct sockaddr ifru_broadaddr;

        struct sockaddr ifru_netmask;

        struct sockaddr ifru_hwaddr;

        short int ifru_flags;

        int ifru_ivalue;

        int ifru_mtu;

        struct ifmap ifru_map;

        char ifru_slave[IFNAMSIZ];      /* Just fits the size */

        __caddr_t ifru_data;

      } ifr_ifru;

  };

#define ifr_name        ifr_ifrn.ifrn_name      /* interface name       */

#define ifr_hwaddr      ifr_ifru.ifru_hwaddr    /* MAC address          */

#define ifr_addr        ifr_ifru.ifru_addr      /* address              */

#define ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-p lnk */

#define ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address    */

#define ifr_netmask     ifr_ifru.ifru_netmask   /* interface net mask   */

#define ifr_flags       ifr_ifru.ifru_flags     /* flags                */

#define ifr_metric      ifr_ifru.ifru_ivalue    /* metric               */

#define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu                  */

#define ifr_map         ifr_ifru.ifru_map       /* device map           */

#define ifr_slave       ifr_ifru.ifru_slave     /* slave device         */

#define ifr_data        ifr_ifru.ifru_data      /* for use by interface */

#define ifr_ifindex     ifr_ifru.ifru_ivalue    /* interface index      */

/* Structure used in SIOCGIFCONF request.  Used to retrieve interface

   configuration for machine (useful for programs which must know all

   networks accessible).  */

struct ifconf

  {

    int ifc_len;                        /* Size of buffer.  */

    union

      {

        __caddr_t ifcu_buf;

        struct ifreq *ifcu_req;

      } ifc_ifcu;

  };

#define ifc_buf ifc_ifcu.ifcu_buf       /* Buffer address.  */

#define ifc_req ifc_ifcu.ifcu_req       /* Array of structures.  */

#endif /* net/if.h */