| /* |
| * INET An implementation of the TCP/IP protocol suite for the LINUX |
| * operating system. INET is implemented using the BSD Socket |
| * interface as the means of communication with the user level. |
| * |
| * Global definitions for the ARP (RFC 826) protocol. |
| * |
| * Version: @(#)if_arp.h 1.0.1 04/16/93 |
| * |
| * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988 |
| * Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source. |
| * Ross Biro |
| * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| * Florian La Roche, |
| * Jonathan Layes <layes@loran.com> |
| * Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25 |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #ifndef _LINUX_IF_ARP_H |
| #define _LINUX_IF_ARP_H |
| |
| #include <linux/skbuff.h> |
| #include <uapi/linux/if_arp.h> |
| |
| static inline struct arphdr *arp_hdr(const struct sk_buff *skb) |
| { |
| return (struct arphdr *)skb_network_header(skb); |
| } |
| |
| static inline int arp_hdr_len(struct net_device *dev) |
| { |
| switch (dev->type) { |
| #if IS_ENABLED(CONFIG_FIREWIRE_NET) |
| case ARPHRD_IEEE1394: |
| /* ARP header, device address and 2 IP addresses */ |
| return sizeof(struct arphdr) + dev->addr_len + sizeof(u32) * 2; |
| #endif |
| default: |
| /* ARP header, plus 2 device addresses, plus 2 IP addresses. */ |
| return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2; |
| } |
| } |
| #endif /* _LINUX_IF_ARP_H */ |
