diff options
Diffstat (limited to 'include/linux/etherdevice.h')
| -rw-r--r-- | include/linux/etherdevice.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h new file mode 100644 index 00000000000..396c48cbaeb --- /dev/null +++ b/include/linux/etherdevice.h @@ -0,0 +1,88 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. NET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * Definitions for the Ethernet handlers. + * + * Version: @(#)eth.h 1.0.4 05/13/93 + * + * Authors: Ross Biro, <bir7@leland.Stanford.Edu> + * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> + * + * Relocated to include/linux where it belongs by Alan Cox + * <gw4pts@gw4pts.ampr.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * WARNING: This move may well be temporary. This file will get merged with others RSN. + * + */ +#ifndef _LINUX_ETHERDEVICE_H +#define _LINUX_ETHERDEVICE_H + +#include <linux/if_ether.h> +#include <linux/random.h> + +#ifdef __KERNEL__ +extern int eth_header(struct sk_buff *skb, struct net_device *dev, + unsigned short type, void *daddr, + void *saddr, unsigned len); +extern int eth_rebuild_header(struct sk_buff *skb); +extern unsigned short eth_type_trans(struct sk_buff *skb, struct net_device *dev); +extern void eth_header_cache_update(struct hh_cache *hh, struct net_device *dev, + unsigned char * haddr); +extern int eth_header_cache(struct neighbour *neigh, + struct hh_cache *hh); + +extern struct net_device *alloc_etherdev(int sizeof_priv); +static inline void eth_copy_and_sum (struct sk_buff *dest, + const unsigned char *src, + int len, int base) +{ + memcpy (dest->data, src, len); +} + +/** + * is_zero_ether_addr - Determine if give Ethernet address is all + * zeros. + */ +static inline int is_zero_ether_addr(const u8 *addr) +{ + return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); +} + +/** + * is_valid_ether_addr - Determine if the given Ethernet address is valid + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not + * a multicast address, and is not FF:FF:FF:FF:FF:FF. The multicast + * and FF:FF:... tests are combined into the single test "!(addr[0]&1)". + * + * Return true if the address is valid. + */ +static inline int is_valid_ether_addr(const u8 *addr) +{ + return !(addr[0]&1) && !is_zero_ether_addr(addr); +} + +/** + * random_ether_addr - Generate software assigned random Ethernet address + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Generate a random Ethernet address (MAC) that is not multicast + * and has the local assigned bit set. + */ +static inline void random_ether_addr(u8 *addr) +{ + get_random_bytes (addr, ETH_ALEN); + addr [0] &= 0xfe; /* clear multicast bit */ + addr [0] |= 0x02; /* set local assignment bit (IEEE802) */ +} +#endif + +#endif /* _LINUX_ETHERDEVICE_H */ |