/* SPDX-License-Identifier: GPL-2.0-or-later */
|
/*
|
* 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
|
*/
|
#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 unsigned int arp_hdr_len(const 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;
|
}
|
}
|
|
static inline bool dev_is_mac_header_xmit(const struct net_device *dev)
|
{
|
switch (dev->type) {
|
case ARPHRD_TUNNEL:
|
case ARPHRD_TUNNEL6:
|
case ARPHRD_SIT:
|
case ARPHRD_IPGRE:
|
case ARPHRD_VOID:
|
case ARPHRD_NONE:
|
case ARPHRD_RAWIP:
|
case ARPHRD_PIMREG:
|
return false;
|
default:
|
return true;
|
}
|
}
|
|
#endif /* _LINUX_IF_ARP_H */
|
