1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/string.h>
3 #include <linux/if_ether.h>
4 #include <linux/ctype.h>
5 #include <linux/kernel.h>
7 bool mac_pton(const char *s, u8 *mac)
11 /* XX:XX:XX:XX:XX:XX */
12 if (strlen(s) < 3 * ETH_ALEN - 1)
15 /* Don't dirty result unless string is valid MAC. */
16 for (i = 0; i < ETH_ALEN; i++) {
17 if (!isxdigit(s[i * 3]) || !isxdigit(s[i * 3 + 1]))
19 if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':')
22 for (i = 0; i < ETH_ALEN; i++) {
23 mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]);
27 EXPORT_SYMBOL(mac_pton);