// SPDX-License-Identifier: GPL-2.0 | |
#include <linux/string.h> | |
#include <linux/if_ether.h> | |
#include <linux/ctype.h> | |
#include <linux/export.h> | |
#include <linux/hex.h> | |
bool mac_pton(const char *s, u8 *mac) | |
{ | |
size_t maxlen = 3 * ETH_ALEN - 1; | |
int i; | |
/* XX:XX:XX:XX:XX:XX */ | |
if (strnlen(s, maxlen) < maxlen) | |
return false; | |
/* Don't dirty result unless string is valid MAC. */ | |
for (i = 0; i < ETH_ALEN; i++) { | |
if (!isxdigit(s[i * 3]) || !isxdigit(s[i * 3 + 1])) | |
return false; | |
if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':') | |
return false; | |
} | |
for (i = 0; i < ETH_ALEN; i++) { | |
mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]); | |
} | |
return true; | |
} | |
EXPORT_SYMBOL(mac_pton); |