[PATCH wpan/next v3 7/9] net: mac802154: Ensure proper scan-level filtering
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: 2022-09-05 20:34:47
Subsystem:
ieee 802.15.4 subsystem, networking [general], the rest · Maintainers:
Alexander Aring, Stefan Schmidt, Miquel Raynal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
We now have a fine grained filtering information so let's ensure proper filtering in scan mode, which means that only beacons are processed. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- net/mac802154/rx.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c
index 8a8c5a4a2f28..c43289c0fdd7 100644
--- a/net/mac802154/rx.c
+++ b/net/mac802154/rx.c@@ -34,6 +34,7 @@ ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, struct sk_buff *skb, const struct ieee802154_hdr *hdr) { struct wpan_dev *wpan_dev = &sdata->wpan_dev; + struct wpan_phy *wpan_phy = sdata->local->hw.phy; __le16 span, sshort; int rc;
@@ -42,6 +43,17 @@ ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, span = wpan_dev->pan_id; sshort = wpan_dev->short_addr; + /* Level 3 filtering: Only beacons are accepted during scans */ + if (sdata->required_filtering == IEEE802154_FILTERING_3_SCAN && + sdata->required_filtering > wpan_phy->filtering) { + if (mac_cb(skb)->type != IEEE802154_FC_TYPE_BEACON) { + dev_dbg(&sdata->dev->dev, + "drop !beacon frame (0x%x) during scan\n", + mac_cb(skb)->type); + goto fail; + } + } + switch (mac_cb(skb)->dest.mode) { case IEEE802154_ADDR_NONE: if (hdr->source.mode != IEEE802154_ADDR_NONE)
--
2.34.1