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/* 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