| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| Andy Shevchenko | 4cd5773 | 2013-06-04 19:46:26 +0300 | [diff] [blame] | 2 | #include <linux/string.h> |
| 3 | #include <linux/if_ether.h> |
| 4 | #include <linux/ctype.h> |
| 5 | #include <linux/kernel.h> |
| 6 | |
| Joe Perches | a69f5ed | 2014-06-24 11:20:48 -0700 | [diff] [blame] | 7 | bool mac_pton(const char *s, u8 *mac) |
| Andy Shevchenko | 4cd5773 | 2013-06-04 19:46:26 +0300 | [diff] [blame] | 8 | { |
| 9 | int i; |
| 10 | |
| 11 | /* XX:XX:XX:XX:XX:XX */ |
| 12 | if (strlen(s) < 3 * ETH_ALEN - 1) |
| Joe Perches | a69f5ed | 2014-06-24 11:20:48 -0700 | [diff] [blame] | 13 | return false; |
| Andy Shevchenko | 4cd5773 | 2013-06-04 19:46:26 +0300 | [diff] [blame] | 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])) |
| Joe Perches | a69f5ed | 2014-06-24 11:20:48 -0700 | [diff] [blame] | 18 | return false; |
| Andy Shevchenko | 4cd5773 | 2013-06-04 19:46:26 +0300 | [diff] [blame] | 19 | if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':') |
| Joe Perches | a69f5ed | 2014-06-24 11:20:48 -0700 | [diff] [blame] | 20 | return false; |
| Andy Shevchenko | 4cd5773 | 2013-06-04 19:46:26 +0300 | [diff] [blame] | 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 | } |
| Joe Perches | a69f5ed | 2014-06-24 11:20:48 -0700 | [diff] [blame] | 25 | return true; |
| Andy Shevchenko | 4cd5773 | 2013-06-04 19:46:26 +0300 | [diff] [blame] | 26 | } |
| 27 | EXPORT_SYMBOL(mac_pton); |