/*
 * 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: 1.54 1999/06/19 18:42:27
 */

#ifndef _NET_IF_H_
#define	_NET_IF_H_

/*
 * <net/if.h> does not depend on <sys/time.h> on most other systems.  This
 * helps userland compatability.  (struct timeval ifi_lastchange)
 */
#ifndef KERNEL
#include <sys/time.h>
#endif

/*
 * Length of interface external name, including terminating '\0'.
 * Note: this is the same size as a generic device's external name.
 */
#define		IF_NAMESIZE	16
#define		IFNAMSIZ	IF_NAMESIZE

/*
 * 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_recvtiming;		/* usec spent receiving when timing */
	u_long	ifi_xmittiming;		/* usec spent xmitting when timing */
	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_SMART	0x20		/* interface manages own routes */
#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 */

#ifdef __riscos
/*
 * flags specific to RISC OS Internet driver
 */
# define IFF_SRCSUPPLIED 0x10000
# define IFF_NEED_IPADDR 0x20000
# define IFF_NEED_MASK	 0x40000
# define IFF_NODRIVER	 0x80000
/* flags set internally only: */
#define	IFF_CANTCHANGE \
	(IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
	    IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_SMART|\
	    IFF_SRCSUPPLIED|IFF_NEED_IPADDR|IFF_NEED_MASK|IFF_NODRIVER)
#else
/* flags set internally only: */
#define	IFF_CANTCHANGE \
	(IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
	    IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_SMART)
#endif

/*
 * Values for if_link_state.
 */
#define	LINK_STATE_UNKNOWN	0	/* link invalid/unknown */
#define	LINK_STATE_DOWN		1	/* link is down */
#define	LINK_STATE_UP		2	/* link is up */

#define IFQ_MAXLEN	100		/* Increased from 50 CE - 981125 */
#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 compatability */
	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 compatability */
	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 compatability */
	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;
		short	ifru_flags[2];
		int	ifru_metric;
		int	ifru_mtu;
		int	ifru_phys;
		int	ifru_media;
		caddr_t ifru_data;
	} 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_flags	ifr_ifru.ifru_flags[0]	/* flags (low 16 bits) */
#define	ifr_flagshigh	ifr_ifru.ifru_flags[1]	/* flags (high 16 bits) */
#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 */
};

#ifdef COMPAT_INET4
struct	nifreq {
#else
struct	oifreq {
#endif
	char	ifr_name[IFNAMSIZ];		/* if name, e.g. "en0" */
	union {
#ifdef COMPAT_INET4
		struct	nsockaddr ifru_addr;
		struct	nsockaddr ifru_dstaddr;
		struct	nsockaddr ifru_broadaddr;
#else
		struct	osockaddr ifru_addr;
		struct	osockaddr ifru_dstaddr;
		struct	osockaddr ifru_broadaddr;
#endif
		short	ifru_flags[2];
		int	ifru_metric;
		int	ifru_mtu;
		int	ifru_phys;
		int	ifru_media;
		caddr_t ifru_data;
	} ifr_ifru;
};

#define	_SIZEOF_ADDR_IFREQ(ifr) \
	((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
	 (sizeof(struct ifreq) - sizeof(struct sockaddr) + \
	  (ifr).ifr_addr.sa_len) : sizeof(struct ifreq))

struct ifaliasreq {
	char	ifra_name[IFNAMSIZ];		/* if name, e.g. "en0" */
#ifdef COMPAT_INET4
	struct	nsockaddr ifra_addr;
	struct	nsockaddr ifra_broadaddr;
	struct	nsockaddr ifra_mask;
#else
	struct	sockaddr ifra_addr;
	struct	sockaddr ifra_broadaddr;
	struct	sockaddr ifra_mask;
#endif
};

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&past 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 */
};

#ifdef COMPAT_INET4
struct	nifconf {
	int	ifc_len;		/* size of associated buffer */
	union {
		caddr_t ifcu_buf;
		struct	nifreq *ifcu_req;
	} ifc_ifcu;
};
#else
struct	oifconf {
	int	ifc_len;		/* size of associated buffer */
	union {
		caddr_t ifcu_buf;
		struct	oifreq *ifcu_req;
	} ifc_ifcu;
};
#endif

#ifdef KERNEL
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_IFADDR);
MALLOC_DECLARE(M_IFMADDR);
#endif
#endif

#ifdef KERNEL
#include <net/if_var.h>
#else
struct if_nameindex {
	unsigned int	if_index;	/* 1, 2, ... */
	char		*if_name;	/* null terminated name: "le0", ... */
};

void			 if_freenameindex(struct if_nameindex *);
char			*if_indextoname(unsigned int, char *);
struct if_nameindex	*if_nameindex(void);
unsigned int		 if_nametoindex(const char *);
#endif

#endif /* !_NET_IF_H_ */
