|  |  | 
|  | /* 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		*/ |