[people/ms/u-boot.git] / tools / gen_eth_addr.c

/*
 * (C) Copyright 2001
 * Murray Jensen <Murray.Jensen@cmst.csiro.au>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>

int
main(int argc, char *argv[])
{
    unsigned long ethaddr_low, ethaddr_high;

    srand(time(0) + (getpid() << 8));

    /*
     * setting the 2nd LSB in the most significant byte of
     * the address makes it a locally administered ethernet
     * address
     */
    ethaddr_high = (rand() & 0xfeff) | 0x0200;
    ethaddr_low = rand();

    printf("%02lx:%02lx:%02lx:%02lx:%02lx:%02lx\n",
	ethaddr_high >> 8, ethaddr_high & 0xff,
	ethaddr_low >> 24, (ethaddr_low >> 16) & 0xff,
	(ethaddr_low >> 8) & 0xff, ethaddr_low & 0xff);

    return (0);
}
Commit	Line	Data
5745185e WD	1	/*
	2	* (C) Copyright 2001
	3	* Murray Jensen <Murray.Jensen@cmst.csiro.au>
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
5745185e WD	6	*/
	7
	8	#include <stdio.h>
	9	#include <stdlib.h>
	10	#include <unistd.h>
	11	#include <time.h>
	12
	13	int
	14	main(int argc, char *argv[])
	15	{
	16	unsigned long ethaddr_low, ethaddr_high;
	17
3e4dad50	18	srand(time(0) + (getpid() << 8));
5745185e WD	19
	20	/*
	21	* setting the 2nd LSB in the most significant byte of
	22	* the address makes it a locally administered ethernet
	23	* address
	24	*/
2eeb4e95 PT	25	ethaddr_high = (rand() & 0xfeff) \| 0x0200;
2eeb4e95 PT	26	ethaddr_low = rand();
5745185e WD	27
	28	printf("%02lx:%02lx:%02lx:%02lx:%02lx:%02lx\n",
	29	ethaddr_high >> 8, ethaddr_high & 0xff,
	30	ethaddr_low >> 24, (ethaddr_low >> 16) & 0xff,
	31	(ethaddr_low >> 8) & 0xff, ethaddr_low & 0xff);
	32
	33	return (0);
	34	}