blob: 89b4614a47220e498b604034090eda7f10963b2c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Global definitions for the ARP (RFC 826) protocol.
7 *
8 * Version: @(#)if_arp.h 1.0.1 04/16/93
9 *
10 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
11 * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
Jesper Juhl02c30a82005-05-05 16:16:16 -070012 * Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
14 * Florian La Roche,
15 * Jonathan Layes <layes@loran.com>
16 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 */
23#ifndef _LINUX_IF_ARP_H
24#define _LINUX_IF_ARP_H
25
Arnaldo Carvalho de Melod0a92be2007-03-12 20:56:31 -030026#include <linux/skbuff.h>
David Howells607ca462012-10-13 10:46:48 +010027#include <uapi/linux/if_arp.h>
Arnaldo Carvalho de Melod0a92be2007-03-12 20:56:31 -030028
29static inline struct arphdr *arp_hdr(const struct sk_buff *skb)
30{
31 return (struct arphdr *)skb_network_header(skb);
32}
Pavel Emelyanov988b7052008-03-03 12:20:57 -080033
34static inline int arp_hdr_len(struct net_device *dev)
35{
36 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
37 return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2;
38}
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#endif /* _LINUX_IF_ARP_H */