cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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if_arp.h (1689B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      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.
      6 *
      7 *		Global definitions for the ARP (RFC 826) protocol.
      8 *
      9 * Version:	@(#)if_arp.h	1.0.1	04/16/93
     10 *
     11 * Authors:	Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
     12 *		Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
     13 *		Ross Biro
     14 *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
     15 *		Florian La Roche,
     16 *		Jonathan Layes <layes@loran.com>
     17 *		Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
     18 */
     19#ifndef _LINUX_IF_ARP_H
     20#define _LINUX_IF_ARP_H
     21
     22#include <linux/skbuff.h>
     23#include <uapi/linux/if_arp.h>
     24
     25static inline struct arphdr *arp_hdr(const struct sk_buff *skb)
     26{
     27	return (struct arphdr *)skb_network_header(skb);
     28}
     29
     30static inline unsigned int arp_hdr_len(const struct net_device *dev)
     31{
     32	switch (dev->type) {
     33#if IS_ENABLED(CONFIG_FIREWIRE_NET)
     34	case ARPHRD_IEEE1394:
     35		/* ARP header, device address and 2 IP addresses */
     36		return sizeof(struct arphdr) + dev->addr_len + sizeof(u32) * 2;
     37#endif
     38	default:
     39		/* ARP header, plus 2 device addresses, plus 2 IP addresses. */
     40		return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2;
     41	}
     42}
     43
     44static inline bool dev_is_mac_header_xmit(const struct net_device *dev)
     45{
     46	switch (dev->type) {
     47	case ARPHRD_TUNNEL:
     48	case ARPHRD_TUNNEL6:
     49	case ARPHRD_SIT:
     50	case ARPHRD_IPGRE:
     51	case ARPHRD_IP6GRE:
     52	case ARPHRD_VOID:
     53	case ARPHRD_NONE:
     54	case ARPHRD_RAWIP:
     55	case ARPHRD_PIMREG:
     56		return false;
     57	default:
     58		return true;
     59	}
     60}
     61
     62#endif	/* _LINUX_IF_ARP_H */