[PATCH wpan-next v2 2/6] net: ieee802154: Ensure only FFDs can become PAN coordinators

From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Alexander Aring <alex.aring@gmail.com>,
	Stefan Schmidt <stefan@datenfreihafen.org>,
	linux-wpan@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Eric Dumazet <edumazet@google.com>,
	netdev@vger.kernel.org, David Girault <david.girault@qorvo.com>,
	Romuald Despres <romuald.despres@qorvo.com>,
	Frederic Blain <frederic.blain@qorvo.com>,
	Nicolas Schodet <nico@ni.fr.eu.org>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>
Subject: [PATCH wpan-next v2 2/6] net: ieee802154: Ensure only FFDs can become PAN coordinators
Date: Fri, 17 Jun 2022 21:32:50 +0200	[thread overview]
Message-ID: <20220617193254.1275912-3-miquel.raynal@bootlin.com> (raw)
In-Reply-To: <20220617193254.1275912-1-miquel.raynal@bootlin.com>

This is a limitation clearly listed in the specification. Now that we
have device types,let's ensure that only FFDs can become PAN
coordinators.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 net/ieee802154/nl802154.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 638bf544f102..0c6fc3385320 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -924,6 +924,9 @@ static int nl802154_new_interface(struct sk_buff *skb, struct genl_info *info)
 			return -EINVAL;
 	}
 
+	if (type == NL802154_IFTYPE_COORD && !cfg802154_is_ffd(rdev))
+		return -EINVAL;
+
 	if (info->attrs[NL802154_ATTR_EXTENDED_ADDR])
 		extended_addr = nla_get_le64(info->attrs[NL802154_ATTR_EXTENDED_ADDR]);
 
-- 
2.34.1

