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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.
6 * Global definitions for the ARP (RFC 826) protocol.
8 * Version: @(#)if_arp.h 1.0.1 04/16/93
10 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
11 * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
13 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
15 * Jonathan Layes <layes@loran.com>
16 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
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.
23 #ifndef _LINUX_IF_ARP_H
24 #define _LINUX_IF_ARP_H
26 #include <linux/skbuff.h>
27 #include <uapi/linux/if_arp.h>
29 static inline struct arphdr
*arp_hdr(const struct sk_buff
*skb
)
31 return (struct arphdr
*)skb_network_header(skb
);
34 static inline unsigned int arp_hdr_len(const struct net_device
*dev
)
37 #if IS_ENABLED(CONFIG_FIREWIRE_NET)
39 /* ARP header, device address and 2 IP addresses */
40 return sizeof(struct arphdr
) + dev
->addr_len
+ sizeof(u32
) * 2;
43 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
44 return sizeof(struct arphdr
) + (dev
->addr_len
+ sizeof(u32
)) * 2;
48 static inline bool dev_is_mac_header_xmit(const struct net_device
*dev
)
63 #endif /* _LINUX_IF_ARP_H */