1 /*
2 * Copyright (C) 2010 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <stdio.h>
30 #include <sys/types.h>
31 #include <net/ethernet.h>
32
33 /*
34 * Convert Ethernet address to standard hex-digits-and-colons printable form.
35 * Re-entrant version (GNU extensions).
36 */
37 char *
ether_ntoa_r(const struct ether_addr * addr,char * buf)38 ether_ntoa_r (const struct ether_addr *addr, char * buf)
39 {
40 snprintf(buf, 18, "%02x:%02x:%02x:%02x:%02x:%02x",
41 addr->ether_addr_octet[0], addr->ether_addr_octet[1],
42 addr->ether_addr_octet[2], addr->ether_addr_octet[3],
43 addr->ether_addr_octet[4], addr->ether_addr_octet[5]);
44 return buf;
45 }
46
47 /*
48 * Convert Ethernet address to standard hex-digits-and-colons printable form.
49 */
50 char *
ether_ntoa(const struct ether_addr * addr)51 ether_ntoa (const struct ether_addr *addr)
52 {
53 static char buf[18];
54 return ether_ntoa_r(addr, buf);
55 }
56