Root/lib/net_utils.c

1#include <linux/string.h>
2#include <linux/if_ether.h>
3#include <linux/ctype.h>
4#include <linux/kernel.h>
5
6int 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}
26EXPORT_SYMBOL(mac_pton);
27

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