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1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * Global definitions for the ARP (RFC 826) protocol.
9 * Version: @(#)if_arp.h 1.0.1 04/16/93
11 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
12 * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
14 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
16 * Jonathan Layes <layes@loran.com>
17 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
19 #ifndef _LINUX_IF_ARP_H
20 #define _LINUX_IF_ARP_H
22 #include <linux/skbuff.h>
23 #include <uapi/linux/if_arp.h>
25 static inline struct arphdr
*arp_hdr(const struct sk_buff
*skb
)
27 return (struct arphdr
*)skb_network_header(skb
);
30 static inline unsigned int arp_hdr_len(const struct net_device
*dev
)
33 #if IS_ENABLED(CONFIG_FIREWIRE_NET)
35 /* ARP header, device address and 2 IP addresses */
36 return sizeof(struct arphdr
) + dev
->addr_len
+ sizeof(u32
) * 2;
39 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
40 return sizeof(struct arphdr
) + (dev
->addr_len
+ sizeof(u32
)) * 2;
44 static inline bool dev_is_mac_header_xmit(const struct net_device
*dev
)
60 #endif /* _LINUX_IF_ARP_H */