LXR linux/lib/net

   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/kernel.h>
   6
   7bool mac_pton(const char *s, u8 *mac)
   8{
   9        int i;
  10
  11        /* XX:XX:XX:XX:XX:XX */
  12        if (strlen(s) < 3 * ETH_ALEN - 1)
  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(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]);
  24        }
  25        return true;
  26}
  27EXPORT_SYMBOL(mac_pton);
  28