/* * INET		An implementation of the TCP/IP protocol suite for the LINUX *		operating system.  INET is implemented using the  BSD Socket *		interface as the means of communication with the user level. * *		Global definitions for the INET interface module. * * Version:	@(#)if.h	1.0.2	04/18/93 * * Authors:	Original taken from Berkeley UNIX 4.3, (c) UCB 1982-1988 *		Ross Biro, <bir7@leland.Stanford.Edu> *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * *		This program is free software; you can redistribute it and/or *		modify it under the terms of the GNU General Public License *		as published by the Free Software Foundation; either version *		2 of the License, or (at your option) any later version. */#ifndef _LINUX_IF_H#define _LINUX_IF_H#include <linux/types.h>		/* for "caddr_t" et al		*/#include <linux/socket.h>		/* for "struct sockaddr" et al	*//* Structure defining a queue for a network interface. */struct ifnet {  char		*if_name;		/* name, e.g. ``en'' or ``lo''	*/  short		if_unit;		/* sub-unit for device driver	*/  short		if_mtu;			/* maximum transmission unit	*/  short		if_flags;		/* up/down, broadcast, etc.	*/  short		if_timer;		/* time 'til if_watchdog called	*/  int		if_metric;		/* routing metric (not used)	*/  struct	ifaddr *if_addrlist;	/* linked list of addrs per if	*/  struct	ifqueue {#ifdef not_yet_in_linux	struct mbuf	*ifq_head;	struct mbuf	*ifq_tail;	int		ifq_len;	int		ifq_maxlen;	int		ifq_drops;#endif  } if_snd;				/* output queue			*/  /* Procedure handles. */  int		(*if_init)();		/* init routine			*/  int		(*if_output)();		/* output routine		*/  int		(*if_ioctl)();		/* ioctl routine		*/  int		(*if_reset)();		/* bus reset routine		*/  int		(*if_watchdog)();	/* timer routine		*/  /* Generic interface statistics. */  int		if_ipackets;		/* packets recv'd on interface	*/  int		if_ierrors;		/* input errors on interface	*/  int		if_opackets;		/* packets sent on interface	*/  int		if_oerrors;		/* output errors on interface	*/  int		if_collisions;		/* collisions on CSMA i'faces	*/  /* Linked list: pointer to next interface. */  struct ifnet	*if_next;};/* Standard interface flags. */#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 has p-p link	*/#define	IFF_NOTRAILERS	0x20		/* avoid use of trailers	*/#define	IFF_RUNNING	0x40		/* resources allocated		*/#define	IFF_NOARP	0x80		/* no ARP protocol		*//* These are not yet used: */#define	IFF_PROMISC	0x100		/* recve all packets		*/#define	IFF_ALLMULTI	0x200		/* recve all multicast packets	*//* * 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	*//* * 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];		/* if name, e.g. "en0" */		char	ifrn_hwaddr[IFHWADDRLEN];	} ifr_ifrn;		union {		struct	sockaddr ifru_addr;		struct	sockaddr ifru_dstaddr;		struct	sockaddr ifru_broadaddr;		struct	sockaddr ifru_netmask;		short	ifru_flags;		int	ifru_metric;		int	ifru_mtu;		caddr_t	ifru_data;	} ifr_ifru;};#define ifr_name	ifr_ifrn.ifrn_name	/* interface name 	*/#define ifr_hwaddr	ifr_ifrn.ifrn_hwaddr	/* interface hardware   */#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_metric	/* metric		*/#define	ifr_mtu		ifr_ifru.ifru_mtu	/* mtu			*/#define	ifr_data	ifr_ifru.ifru_data	/* for use by interface	*//* * 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	*//* BSD UNIX expects to find these here, so here we go: */#include <linux/if_arp.h>#include <linux/route.h>#endif /* _NET_IF_H */