1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun #include <linux/string.h> 3*4882a593Smuzhiyun #include <linux/if_ether.h> 4*4882a593Smuzhiyun #include <linux/ctype.h> 5*4882a593Smuzhiyun #include <linux/kernel.h> 6*4882a593Smuzhiyun mac_pton(const char * s,u8 * mac)7*4882a593Smuzhiyunbool mac_pton(const char *s, u8 *mac) 8*4882a593Smuzhiyun { 9*4882a593Smuzhiyun int i; 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun /* XX:XX:XX:XX:XX:XX */ 12*4882a593Smuzhiyun if (strlen(s) < 3 * ETH_ALEN - 1) 13*4882a593Smuzhiyun return false; 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun /* Don't dirty result unless string is valid MAC. */ 16*4882a593Smuzhiyun for (i = 0; i < ETH_ALEN; i++) { 17*4882a593Smuzhiyun if (!isxdigit(s[i * 3]) || !isxdigit(s[i * 3 + 1])) 18*4882a593Smuzhiyun return false; 19*4882a593Smuzhiyun if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':') 20*4882a593Smuzhiyun return false; 21*4882a593Smuzhiyun } 22*4882a593Smuzhiyun for (i = 0; i < ETH_ALEN; i++) { 23*4882a593Smuzhiyun mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]); 24*4882a593Smuzhiyun } 25*4882a593Smuzhiyun return true; 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun EXPORT_SYMBOL(mac_pton); 28