/* atmarp.h - ATM ARP protocol and kernel-demon interface definitions */ /* Written 1995-1999 by Werner Almesberger, EPFL LRC/ICA */  #ifndef _LINUX_ATMARP_H#define _LINUX_ATMARP_H #include <linux/types.h>#include <linux/atmapi.h>#include <linux/atmioc.h>  #define ATMARP_RETRY_DELAY 30		/* request next resolution or forget					   NAK after 30 sec - should go into					   atmclip.h */#define ATMARP_MAX_UNRES_PACKETS 5	/* queue that many packets while					   waiting for the resolver */  #define ATMARPD_CTRL	_IO('a',ATMIOC_CLIP+1)	/* become atmarpd ctrl sock */#define ATMARP_MKIP	_IO('a',ATMIOC_CLIP+2)	/* attach socket to IP */#define ATMARP_SETENTRY	_IO('a',ATMIOC_CLIP+3)	/* fill or hide ARP entry */#define ATMARP_ENCAP	_IO('a',ATMIOC_CLIP+5)	/* change encapsulation */  enum atmarp_ctrl_type {	act_invalid,		/* catch uninitialized structures */	act_need,		/* need address resolution */	act_up,			/* interface is coming up */	act_down,		/* interface is going down */	act_change		/* interface configuration has changed */}; struct atmarp_ctrl {	enum atmarp_ctrl_type	type;	/* message type */	int			itf_num;/* interface number (if present) */	__be32			ip;	/* IP address (act_need only) */}; #endif