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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> | |
6 | ||
7 | bool mac_pton(const char *s, u8 *mac) | |
8 | { | |
9 | int i; | |
10 | ||
11 | /* XX:XX:XX:XX:XX:XX */ | |
12 | if (strlen(s) < 3 * ETH_ALEN - 1) | |
13 | return false; | |
14 | ||
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])) | |
18 | return false; | |
19 | if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':') | |
20 | return false; | |
21 | } | |
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]); | |
24 | } | |
25 | return true; | |
26 | } | |
27 | EXPORT_SYMBOL(mac_pton); |