1 /* 2 * (C) Copyright 2001 3 * Murray Jensen <Murray.Jensen@cmst.csiro.au> 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include <unistd.h> 27 #include <time.h> 28 29 int 30 main(int argc, char *argv[]) 31 { 32 unsigned long ethaddr_low, ethaddr_high; 33 34 srand(time(0) | getpid()); 35 36 /* 37 * setting the 2nd LSB in the most significant byte of 38 * the address makes it a locally administered ethernet 39 * address 40 */ 41 ethaddr_high = (rand() & 0xfeff) | 0x0200; 42 ethaddr_low = rand(); 43 44 printf("%02lx:%02lx:%02lx:%02lx:%02lx:%02lx\n", 45 ethaddr_high >> 8, ethaddr_high & 0xff, 46 ethaddr_low >> 24, (ethaddr_low >> 16) & 0xff, 47 (ethaddr_low >> 8) & 0xff, ethaddr_low & 0xff); 48 49 return (0); 50 } 51