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/*

 * Copyright (c) 1982, 1986, 1989, 1993

 *      The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *      @(#)if.h        8.1 (Berkeley) 6/10/93

 * $FreeBSD: src/sys/net/if.h,v 1.71 2002/03/19 21:54:16 alfred Exp $

 */

#ifndef _NET_IF_H_

#define _NET_IF_H_

#include <sys/queue.h>

#include <sys/socket.h>

/*

 * <net/if.h> does not depend on <sys/time.h> on most other systems.  This

 * helps userland compatibility.  (struct timeval ifi_lastchange)

 */

#ifndef _KERNEL

#include <sys/time.h>

#endif

struct ifnet;

/*

 * Length of interface external name, including terminating '\0'.

 * Note: this is the same size as a generic device's external name.

 */

#define         IFNAMSIZ        16

#define         IF_NAMESIZE     IFNAMSIZ

#define         IF_MAXUNIT      0x7fff  /* ifp->if_unit is only 15 bits */

/*

 * Structure describing a `cloning' interface.

 */

struct if_clone {

        LIST_ENTRY(if_clone) ifc_list;  /* on list of cloners */

        const char *ifc_name;           /* name of device, e.g. `gif' */

        size_t ifc_namelen;             /* length of name */

        int ifc_maxunit;                /* maximum unit number */

        unsigned char *ifc_units;       /* bitmap to handle units */

        int ifc_bmlen;                  /* bitmap length */

        int     (*ifc_create)(struct if_clone *, int);

        int     (*ifc_destroy)(struct ifnet *);

};

#define IF_CLONE_INITIALIZER(name, create, destroy, maxunit)            \

        { { 0 }, name, sizeof(name) - 1, maxunit, NULL, 0, create, destroy }

/*

 * Structure used to query names of interface cloners.

 */

struct if_clonereq {

        int     ifcr_total;             /* total cloners (out) */

        int     ifcr_count;             /* room for this many in user buffer */

        char    *ifcr_buffer;           /* buffer for cloner names */

};

/*

 * Structure describing information about an interface

 * which may be of interest to management entities.

 */

struct if_data {

        /* generic interface information */

        u_char  ifi_type;               /* ethernet, tokenring, etc */

        u_char  ifi_physical;           /* e.g., AUI, Thinnet, 10base-T, etc */

        u_char  ifi_addrlen;            /* media address length */

        u_char  ifi_hdrlen;             /* media header length */

        u_char  ifi_recvquota;          /* polling quota for receive intrs */

        u_char  ifi_xmitquota;          /* polling quota for xmit intrs */

        u_long  ifi_mtu;                /* maximum transmission unit */

        u_long  ifi_metric;             /* routing metric (external only) */

        u_long  ifi_baudrate;           /* linespeed */

        /* volatile statistics */

        u_long  ifi_ipackets;           /* packets received on interface */

        u_long  ifi_ierrors;            /* input errors on interface */

        u_long  ifi_opackets;           /* packets sent on interface */

        u_long  ifi_oerrors;            /* output errors on interface */

        u_long  ifi_collisions;         /* collisions on csma interfaces */

        u_long  ifi_ibytes;             /* total number of octets received */

        u_long  ifi_obytes;             /* total number of octets sent */

        u_long  ifi_imcasts;            /* packets received via multicast */

        u_long  ifi_omcasts;            /* packets sent via multicast */

        u_long  ifi_iqdrops;            /* dropped on input, this interface */

        u_long  ifi_noproto;            /* destined for unsupported protocol */

        u_long  ifi_hwassist;           /* HW offload capabilities */

        u_long  ifi_unused;             /* XXX was ifi_xmittiming */

        struct  timeval ifi_lastchange; /* time of last administrative change */

};

#define IFF_UP          0x1             /* interface is up */

#define IFF_BROADCAST   0x2             /* broadcast address valid */

#define IFF_DEBUG       0x4             /* turn on debugging */

#define IFF_LOOPBACK    0x8             /* is a loopback net */

#define IFF_POINTOPOINT 0x10            /* interface is point-to-point link */

#define IFF_NOTRAILERS  0x20            /* avoid use of trailers */

#define IFF_RUNNING     0x40            /* resources allocated */

#define IFF_NOARP       0x80            /* no address resolution protocol */

#define IFF_PROMISC     0x100           /* receive all packets */

#define IFF_ALLMULTI    0x200           /* receive all multicast packets */

#define IFF_OACTIVE     0x400           /* transmission in progress */

#define IFF_SIMPLEX     0x800           /* can't hear own transmissions */

#define IFF_LINK0       0x1000          /* per link layer defined bit */

#define IFF_LINK1       0x2000          /* per link layer defined bit */

#define IFF_LINK2       0x4000          /* per link layer defined bit */

#define IFF_ALTPHYS     IFF_LINK2       /* use alternate physical connection */

#define IFF_MULTICAST   0x8000          /* supports multicast */

/*

 * The following flag(s) ought to go in if_flags, but we cannot change

 * struct ifnet because of binary compatibility, so we store them in

 * if_ipending, which is not used so far.

 * If possible, make sure the value is not conflicting with other

 * IFF flags, so we have an easier time when we want to merge them.

 */

#define IFF_POLLING     0x10000         /* Interface is in polling mode. */

/* flags set internally only: */

#define IFF_CANTCHANGE \

        (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\

            IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_NOTRAILERS)

/* Capabilities that interfaces can advertise. */

#define IFCAP_RXCSUM            0x0001  /* can offload checksum on RX */

#define IFCAP_TXCSUM            0x0002  /* can offload checksum on TX */

#define IFCAP_NETCONS           0x0004  /* can be a network console */

#define IFCAP_HWCSUM            (IFCAP_RXCSUM | IFCAP_TXCSUM)

#define IFQ_MAXLEN      50

#define IFNET_SLOWHZ    1               /* granularity is 1 second */

/*

 * Message format for use in obtaining information about interfaces

 * from getkerninfo and the routing socket

 */

struct if_msghdr {

        u_short ifm_msglen;     /* to skip over non-understood messages */

        u_char  ifm_version;    /* future binary compatibility */

        u_char  ifm_type;       /* message type */

        int     ifm_addrs;      /* like rtm_addrs */

        int     ifm_flags;      /* value of if_flags */

        u_short ifm_index;      /* index for associated ifp */

        struct  if_data ifm_data;/* statistics and other data about if */

};

/*

 * Message format for use in obtaining information about interface addresses

 * from getkerninfo and the routing socket

 */

struct ifa_msghdr {

        u_short ifam_msglen;    /* to skip over non-understood messages */

        u_char  ifam_version;   /* future binary compatibility */

        u_char  ifam_type;      /* message type */

        int     ifam_addrs;     /* like rtm_addrs */

        int     ifam_flags;     /* value of ifa_flags */

        u_short ifam_index;     /* index for associated ifp */

        int     ifam_metric;    /* value of ifa_metric */

};

/*

 * Message format for use in obtaining information about multicast addresses

 * from the routing socket

 */

struct ifma_msghdr {

        u_short ifmam_msglen;   /* to skip over non-understood messages */

        u_char  ifmam_version;  /* future binary compatibility */

        u_char  ifmam_type;     /* message type */

        int     ifmam_addrs;    /* like rtm_addrs */

        int     ifmam_flags;    /* value of ifa_flags */

        u_short ifmam_index;    /* index for associated ifp */

};

/*

 * Message format announcing the arrival or departure of a network interface.

 */

struct if_announcemsghdr {

        u_short ifan_msglen;    /* to skip over non-understood messages */

        u_char  ifan_version;   /* future binary compatibility */

        u_char  ifan_type;      /* message type */

        u_short ifan_index;     /* index for associated ifp */

        char    ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */

        u_short ifan_what;      /* what type of announcement */

};

#define IFAN_ARRIVAL    0        /* interface arrival */

#define IFAN_DEPARTURE  1       /* interface departure */

/*

 * 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 {

        char    ifr_name[IFNAMSIZ];             /* if name, e.g. "en0" */

        union {

                struct  sockaddr ifru_addr;

                struct  sockaddr ifru_dstaddr;

                struct  sockaddr ifru_broadaddr;

                struct  sockaddr ifru_netmask;

                short   ifru_flags[2];

                short   ifru_index;

                int     ifru_metric;

                int     ifru_mtu;

                int     ifru_phys;

                int     ifru_media;

                caddr_t ifru_data;

                int     ifru_cap[2];

        } ifr_ifru;

#define ifr_addr        ifr_ifru.ifru_addr      /* address */

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

#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[0]  /* flags */

#define ifr_prevflags   ifr_ifru.ifru_flags[1]  /* flags */

#define ifr_metric      ifr_ifru.ifru_metric    /* metric */

#define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu */

#define ifr_phys        ifr_ifru.ifru_phys      /* physical wire */

#define ifr_media       ifr_ifru.ifru_media     /* physical media */

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

#define ifr_reqcap      ifr_ifru.ifru_cap[0]    /* requested capabilities */

#define ifr_curcap      ifr_ifru.ifru_cap[1]    /* current capabilities */

#define ifr_index       ifr_ifru.ifru_index     /* interface index */

};

struct ifaliasreq {

        char    ifra_name[IFNAMSIZ];            /* if name, e.g. "en0" */

        struct  sockaddr ifra_addr;

        struct  sockaddr ifra_broadaddr;

        struct  sockaddr ifra_mask;

};

struct ifmediareq {

        char    ifm_name[IFNAMSIZ];     /* if name, e.g. "en0" */

        int     ifm_current;            /* current media options */

        int     ifm_mask;               /* don't care mask */

        int     ifm_status;             /* media status */

        int     ifm_active;             /* active options */

        int     ifm_count;              /* # entries in ifm_ulist array */

        int     *ifm_ulist;             /* media words */

};

/*

 * Structure used to retrieve aux status data from interfaces.

 * Kernel suppliers to this interface should respect the formatting

 * needed by ifconfig(8): each line starts with a TAB and ends with

 * a newline.  The canonical example to copy and paste is in if_tun.c.

 */

#define IFSTATMAX       800             /* 10 lines of text */

struct ifstat {

        char    ifs_name[IFNAMSIZ];     /* if name, e.g. "en0" */

        char    ascii[IFSTATMAX + 1];

};

/*

 * 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 associated 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 returned */

};

/*

 * Structure for SIOC[AGD]LIFADDR

 */

struct if_laddrreq {

        char    iflr_name[IFNAMSIZ];

        u_int   flags;

#define IFLR_PREFIX     0x8000  /* in: prefix given  out: kernel fills id */

        u_int   prefixlen;         /* in/out */

        struct  sockaddr_storage addr;   /* in/out */

        struct  sockaddr_storage dstaddr; /* out */

};

#ifdef _KERNEL

#ifdef MALLOC_DECLARE

MALLOC_DECLARE(M_IFADDR);

MALLOC_DECLARE(M_IFMADDR);

#endif

#endif

#ifndef _KERNEL

struct if_nameindex {

        u_int   if_index;       /* 1, 2, ... */

        char    *if_name;       /* null terminated name: "le0", ... */

};

__BEGIN_DECLS

u_int    if_nametoindex(const char *);

char    *if_indextoname(u_int, char *);

struct   if_nameindex *if_nameindex(void);

void     if_freenameindex(struct if_nameindex *);

__END_DECLS

#endif

#ifdef _KERNEL

struct thread;

/* XXX - this should go away soon. */

#include <net/if_var.h>

#endif

#endif /* !_NET_IF_H_ */