xref: /openbmc/u-boot/tools/gen_eth_addr.c (revision f77d4410)
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  
12  int
13  main(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