[J-u-boot.git] / tools / gen_eth_addr.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2001
 * Murray Jensen <[email protected]>
 */

#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
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
5745185e WD	2	/*
	3	* (C) Copyright 2001
	4	* Murray Jensen <[email protected]>
5745185e WD	5	*/
	6
	7	#include <stdio.h>
	8	#include <stdlib.h>
	9	#include <unistd.h>
	10	#include <time.h>
	11
	12	int
	13	main(int argc, char *argv[])
	14	{
	15	unsigned long ethaddr_low, ethaddr_high;
	16
3e4dad50	17	srand(time(0) + (getpid() << 8));
5745185e WD	18
	19	/*
	20	* setting the 2nd LSB in the most significant byte of
	21	* the address makes it a locally administered ethernet
	22	* address
	23	*/
2eeb4e95 PT	24	ethaddr_high = (rand() & 0xfeff) \| 0x0200;
2eeb4e95 PT	25	ethaddr_low = rand();
5745185e WD	26
	27	printf("%02lx:%02lx:%02lx:%02lx:%02lx:%02lx\n",
	28	ethaddr_high >> 8, ethaddr_high & 0xff,
	29	ethaddr_low >> 24, (ethaddr_low >> 16) & 0xff,
	30	(ethaddr_low >> 8) & 0xff, ethaddr_low & 0xff);
	31
	32	return (0);
	33	}