linux-kernel - [PATCH 1/2] mac_pton: support MAC addresses with other delimiters

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Date:   Mon, 02 Oct 2023 23:40:02 +0000
From:   Michael Pratt <mcpratt@...tonmail.com>
To:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Rafal Milecki <zajec5@...il.com>,
        Christian Marangi <ansuelsmth@...il.com>,
        Michael Pratt <mcpratt@...me>
Subject: [PATCH 1/2] mac_pton: support MAC addresses with other delimiters

From: Michael Pratt <mcpratt@...me>

Some network hardware vendors may do something unique
when storing the MAC address into hardware in ASCII,
like using hyphens as the delimiter.

Allow parsing of MAC addresses with a non-standard
delimiter (punctuation other than a colon).

e.g. aa-bb-cc-dd-ee-ff

Signed-off-by: Michael Pratt <mcpratt@...me>
---
 lib/net_utils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/net_utils.c b/lib/net_utils.c
index 42bb0473fb22..ecb7625e1dec 100644
--- a/lib/net_utils.c
+++ b/lib/net_utils.c
@@ -18,7 +18,7 @@ bool mac_pton(const char *s, u8 *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] != ':')
+		if (i != ETH_ALEN - 1 && !ispunct(s[i * 3 + 2]))
 			return false;
 	}
 	for (i = 0; i < ETH_ALEN; i++) {
-- 
2.30.2