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introduce helper to generate mac address with OUI 

use random mac address with fixed OUI provided

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Jean-Christophe PLAGNIOL-VILLARD 2013-09-20 07:47:43 +02:00 committed by Sascha Hauer
parent 189678dc67
commit 3293c860ab
1 changed files with 42 additions and 0 deletions
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include/local_mac_address.h Normal file
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/*
* Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio@jcrosoft.com>
*
* Under GPLv2 only
*/
#ifndef __LOCAL_MAC_ADDRESS_H__
#define __LOCAL_MAC_ADDRESS_H__
#include <net.h>
/**
* local_mac_address_register - use random number with fix
* OUI provided device to provide an Ethernet address
* @ethid: ethernet device id
* @oui: Ethernet OUI (3 bytes)
*
* Generate a local Ethernet address (MAC) that is not multicast using a 1-wire id.
*/
static inline int local_mac_address_register(int ethid, char * oui)
{
char addr[6];
int nb_oui = 3;
int i;
if (!oui)
return -EINVAL;
random_ether_addr(addr);
for (i = 0; i < nb_oui; i++)
addr[i] = oui[i];
addr[0] &= 0xfe; /* clear multicast bit */
addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
eth_register_ethaddr(ethid, addr);
return 0;
}
#endif /* __LOCAL_MAC_ADDRESS_H__ */