1 #include <linux/string.h> 2 #include <linux/if_ether.h> 3 #include <linux/ctype.h> 4 #include <linux/kernel.h> 5 6 int 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 0; 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 0; 18 if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':') 19 return 0; 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 1; 25 } 26 EXPORT_SYMBOL(mac_pton); 27