/* * 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	*//* 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		*/#define	IFF_PROMISC	0x100		/* receive all packets		*//* Not supported */#define	IFF_ALLMULTI	0x200		/* receive all multicast packets*/#define IFF_MASTER	0x400		/* master of a load balancer 	*/#define IFF_SLAVE	0x800		/* slave of a load balancer	*/#define IFF_MULTICAST	0x1000		/* Supports multicast		*/#define IFF_SOFTHEADERS 0x2000		/* Device cannot construct headers					 * until broadcast time. Therefore					 * SOCK_PACKET must call header					 * construction. Private flag.					 * Never visible outside of kernel.					 *//* * 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 mem_start;	unsigned long mem_end;	unsigned short 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];		/* if 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	ifru_flags;		int	ifru_metric;		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_metric	/* 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	*//* * 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 /* _LINUX_IF_H */