1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/* atmarp.h - ATM ARP protocol and kernel-demon interface definitions */
3
4/* Written 1995-1999 by Werner Almesberger, EPFL LRC/ICA */
5
6
7#ifndef _LINUX_ATMARP_H
8#define _LINUX_ATMARP_H
9
10#include <linux/types.h>
11#include <linux/atmapi.h>
12#include <linux/atmioc.h>
13
14
15#define ATMARP_RETRY_DELAY 30		/* request next resolution or forget
16					   NAK after 30 sec - should go into
17					   atmclip.h */
18#define ATMARP_MAX_UNRES_PACKETS 5	/* queue that many packets while
19					   waiting for the resolver */
20
21
22#define ATMARPD_CTRL	_IO('a',ATMIOC_CLIP+1)	/* become atmarpd ctrl sock */
23#define ATMARP_MKIP	_IO('a',ATMIOC_CLIP+2)	/* attach socket to IP */
24#define ATMARP_SETENTRY	_IO('a',ATMIOC_CLIP+3)	/* fill or hide ARP entry */
25#define ATMARP_ENCAP	_IO('a',ATMIOC_CLIP+5)	/* change encapsulation */
26
27
28enum atmarp_ctrl_type {
29	act_invalid,		/* catch uninitialized structures */
30	act_need,		/* need address resolution */
31	act_up,			/* interface is coming up */
32	act_down,		/* interface is going down */
33	act_change		/* interface configuration has changed */
34};
35
36struct atmarp_ctrl {
37	enum atmarp_ctrl_type	type;	/* message type */
38	int			itf_num;/* interface number (if present) */
39	__be32			ip;	/* IP address (act_need only) */
40};
41
42#endif
43