blob: 148fc6e99ef63b351977bda6a3b4835e9d24083f
1 | #include <linux/string.h> |
2 | #include <linux/if_ether.h> |
3 | #include <linux/ctype.h> |
4 | #include <linux/kernel.h> |
5 | |
6 | bool mac_pton(const char *s, u8 *mac) |
7 | { |
8 | int i; |
9 | |
10 | /* XX:XX:XX:XX:XX:XX */ |
11 | if (strlen(s) < 3 * ETH_ALEN - 1) |
12 | return false; |
13 | |
14 | /* Don't dirty result unless string is valid MAC. */ |
15 | for (i = 0; i < ETH_ALEN; i++) { |
16 | if (!isxdigit(s[i * 3]) || !isxdigit(s[i * 3 + 1])) |
17 | return false; |
18 | if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':') |
19 | return false; |
20 | } |
21 | for (i = 0; i < ETH_ALEN; i++) { |
22 | mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]); |
23 | } |
24 | return true; |
25 | } |
26 | EXPORT_SYMBOL(mac_pton); |
27 |