mirror of
https://github.com/torvalds/linux.git
synced 2025-10-31 00:28:52 +02:00
6d6c1ba782
There are a few places in the tree which compute the length of the string representation of a MAC address as 3 * ETH_ALEN - 1. Define a constant for this and use it where relevant. No functionality changes are expected. Signed-off-by: Uday Shankar <ushankar@purestorage.com> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Reviewed-by: Breno Leitao <leitao@debian.org> Reviewed-by: Simon Horman <horms@verge.net.au> Link: https://patch.msgid.link/20250312-netconsole-v6-1-3437933e79b8@purestorage.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
27 lines
657 B
C
27 lines
657 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/string.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/export.h>
|
|
#include <linux/hex.h>
|
|
|
|
bool mac_pton(const char *s, u8 *mac)
|
|
{
|
|
int i;
|
|
|
|
if (strnlen(s, MAC_ADDR_STR_LEN) < MAC_ADDR_STR_LEN)
|
|
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);
|