1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. NET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the Ethernet handlers.
7 *
8 * Version: @(#)eth.h 1.0.4 05/13/93
9 *
10 * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *
13 * Relocated to include/linux where it belongs by Alan Cox
14 * <gw4pts@gw4pts.ampr.org>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version
19 * 2 of the License, or (at your option) any later version.
20 *
21 * WARNING: This move may well be temporary. This file will get merged with others RSN.
22 *
23 */
24 #ifndef _LINUX_ETHERDEVICE_H
25 #define _LINUX_ETHERDEVICE_H
26
27 #include <linux/if_ether.h>
28
29 #ifdef __KERNEL__
30 extern int eth_header(struct sk_buff *skb, struct net_device *dev,
31 unsigned short type, void *daddr,
32 void *saddr, unsigned len);
33 extern int eth_rebuild_header(struct sk_buff *skb);
34 extern unsigned short eth_type_trans(struct sk_buff *skb, struct net_device *dev);
35 extern void eth_header_cache_update(struct hh_cache *hh, struct net_device *dev,
36 unsigned char * haddr);
37 extern int eth_header_cache(struct neighbour *neigh,
38 struct hh_cache *hh);
39 extern int eth_header_parse(struct sk_buff *skb,
40 unsigned char *haddr);
41 extern struct net_device *init_etherdev(struct net_device *dev, int sizeof_priv);
42 extern struct net_device *alloc_etherdev(int sizeof_priv);
43
eth_copy_and_sum(struct sk_buff * dest,unsigned char * src,int len,int base)44 static inline void eth_copy_and_sum (struct sk_buff *dest, unsigned char *src, int len, int base)
45 {
46 memcpy (dest->data, src, len);
47 }
48
49 /**
50 * is_valid_ether_addr - Determine if the given Ethernet address is valid
51 * @addr: Pointer to a six-byte array containing the Ethernet address
52 *
53 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
54 * a multicast address, and is not FF:FF:FF:FF:FF:FF. The multicast
55 * and FF:FF:... tests are combined into the single test "!(addr[0]&1)".
56 *
57 * Return true if the address is valid.
58 */
is_valid_ether_addr(u8 * addr)59 static inline int is_valid_ether_addr( u8 *addr )
60 {
61 const char zaddr[6] = {0,};
62
63 return !(addr[0]&1) && memcmp( addr, zaddr, 6);
64 }
65
66 #endif
67
68 #endif /* _LINUX_ETHERDEVICE_H */
69