1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2001
4 * Murray Jensen <Murray.Jensen@cmst.csiro.au>
5 */
6
7#include <stdio.h>
8#include <stdlib.h>
9#include <unistd.h>
10#include <time.h>
11
12int
13main(int argc, char *argv[])
14{
15    unsigned long ethaddr_low, ethaddr_high;
16
17    srand(time(0) + (getpid() << 8));
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     */
24    ethaddr_high = (rand() & 0xfeff) | 0x0200;
25    ethaddr_low = rand();
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}
34