if_ether.h

 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 Ethernet IEEE 802.3 interface.
 8 *
 9 * Version:	@(#)if_ether.h	1.0.1a	02/08/94
10 *
11 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *		Donald Becker, <becker@super.org>
13 *		Alan Cox, <alan@lxorguk.ukuu.org.uk>
14 *		Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
15 */
16#ifndef _LINUX_IF_ETHER_H
17#define _LINUX_IF_ETHER_H
18
19#include <linux/skbuff.h>
20#include <uapi/linux/if_ether.h>
21
22/* XX:XX:XX:XX:XX:XX */
23#define MAC_ADDR_STR_LEN (3 * ETH_ALEN - 1)
24
25static inline struct ethhdr *eth_hdr(const struct sk_buff *skb)
26{
27	return (struct ethhdr *)skb_mac_header(skb);
28}
29
30/* Prefer this version in TX path, instead of
31 * skb_reset_mac_header() + eth_hdr()
32 */
33static inline struct ethhdr *skb_eth_hdr(const struct sk_buff *skb)
34{
35	return (struct ethhdr *)skb->data;
36}
37
38static inline struct ethhdr *inner_eth_hdr(const struct sk_buff *skb)
39{
40	return (struct ethhdr *)skb_inner_mac_header(skb);
41}
42
43int eth_header_parse(const struct sk_buff *skb, const struct net_device *dev,
44		     unsigned char *haddr);
45
46extern ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len);
47
48#endif	/* _LINUX_IF_ETHER_H */