/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

/* 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