[mirror_ubuntu-bionic-kernel.git] / lib / net_utils.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/string.h>
#include <linux/if_ether.h>
#include <linux/ctype.h>
#include <linux/kernel.h>

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

	/* XX:XX:XX:XX:XX:XX */
	if (strlen(s) < 3 * ETH_ALEN - 1)
		return false;

	/* 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]))
			return false;
		if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':')
			return false;
	}
	for (i = 0; i < ETH_ALEN; i++) {
		mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]);
	}
	return true;
}
EXPORT_SYMBOL(mac_pton);
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
4cd5773a AS	2	#include <linux/string.h>
	3	#include <linux/if_ether.h>
	4	#include <linux/ctype.h>
	5	#include <linux/kernel.h>
	6
a69f5edb	7	bool mac_pton(const char s, u8 mac)
4cd5773a AS	8	{
	9	int i;
	10
	11	/* XX:XX:XX:XX:XX:XX */
	12	if (strlen(s) < 3 * ETH_ALEN - 1)
a69f5edb	13	return false;
4cd5773a AS	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]))
a69f5edb	18	return false;
4cd5773a	19	if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':')
a69f5edb	20	return false;
4cd5773a AS	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	}
a69f5edb	25	return true;
4cd5773a AS	26	}
4cd5773a AS	27	EXPORT_SYMBOL(mac_pton);