2 * Copyright (C) 2013 IBM Corporation
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <util/util.h>
23 static const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7',
24 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', };
26 void mac_str(uint8_t *mac, unsigned int maclen, char *buf, unsigned int buflen)
31 assert(buflen > sizeof("unknown"));
33 if (!maclen || maclen * 3 + 1 > buflen) {
34 strcpy(buf, "unknown");
40 for (i = 0; i < maclen; i++) {
41 *(pos++) = hex[mac[i] >> 4 & 0xf];
42 *(pos++) = hex[mac[i] & 0xf];