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Linux/include/linux/if_ether.h

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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 static inline struct ethhdr *eth_hdr(const struct sk_buff *skb)
 23 {
 24         return (struct ethhdr *)skb_mac_header(skb);
 25 }
 26 
 27 /* Prefer this version in TX path, instead of
 28  * skb_reset_mac_header() + eth_hdr()
 29  */
 30 static inline struct ethhdr *skb_eth_hdr(const struct sk_buff *skb)
 31 {
 32         return (struct ethhdr *)skb->data;
 33 }
 34 
 35 static inline struct ethhdr *inner_eth_hdr(const struct sk_buff *skb)
 36 {
 37         return (struct ethhdr *)skb_inner_mac_header(skb);
 38 }
 39 
 40 int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr);
 41 
 42 extern ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len);
 43 
 44 #endif  /* _LINUX_IF_ETHER_H */
 45 

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