net_utils.c 604 Bytes
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#include <linux/string.h>
#include <linux/if_ether.h>
#include <linux/ctype.h>
#include <linux/kernel.h>

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bool mac_pton(const char *s, u8 *mac)
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{
	int i;

	/* XX:XX:XX:XX:XX:XX */
	if (strlen(s) < 3 * ETH_ALEN - 1)
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		return false;
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	/* 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]))
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			return false;
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		if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':')
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			return false;
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	}
	for (i = 0; i < ETH_ALEN; i++) {
		mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]);
	}
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	return true;
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}
EXPORT_SYMBOL(mac_pton);