| 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/export.h> |
| 6 | #include <linux/hex.h> |
| 7 | |
| 8 | bool mac_pton(const char *s, u8 *mac) |
| 9 | { |
| 10 | int i; |
| 11 | |
| 12 | if (strnlen(p: s, MAC_ADDR_STR_LEN) < MAC_ADDR_STR_LEN) |
| 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(ch: s[i * 3]) << 4) | hex_to_bin(ch: s[i * 3 + 1]); |
| 24 | } |
| 25 | return true; |
| 26 | } |
| 27 | EXPORT_SYMBOL(mac_pton); |
| 28 |