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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, unsigned char *haddr);
44
45extern ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len);
46
47#endif /* _LINUX_IF_ETHER_H */