From 5745185e6af453d48e728770e45c3c8fd74a8d11 Mon Sep 17 00:00:00 2001 From: wdenk Date: Thu, 6 Sep 2001 22:25:14 +0000 Subject: Initial revision --- tools/gen_eth_addr.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 tools/gen_eth_addr.c (limited to 'tools') diff --git a/tools/gen_eth_addr.c b/tools/gen_eth_addr.c new file mode 100644 index 0000000000..75be385547 --- /dev/null +++ b/tools/gen_eth_addr.c @@ -0,0 +1,50 @@ +/* + * (C) Copyright 2001 + * Murray Jensen + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include +#include + +int +main(int argc, char *argv[]) +{ + unsigned long ethaddr_low, ethaddr_high; + + srandom(time(0) | getpid()); + + /* + * setting the 2nd LSB in the most significant byte of + * the address makes it a locally administered ethernet + * address + */ + ethaddr_high = (random() & 0xfeff) | 0x0200; + ethaddr_low = random(); + + 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); +} -- cgit v1.2.3