diff options
| author | Ilan Peer <ilan.peer@intel.com> | 2026-10-05 11:44:51 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2026-10-05 15:28:53 +0200 |
| commit | 41da18108d25fb487c503c9a63b72cc543a9e72a (patch) | |
| tree | 8a6f2f7161bf17095678a240366d258baef5ba11 /include/linux | |
| parent | f4134597a0efa48341416fbb76b667d706526c07 (diff) | |
wifi: cfg80211: do not use NAN beacons to update the BSS table
As NAN beacons have a different structure compared to beacons
defined in the IEEE802.11 specification, e.g., they do not contain
a SSID element etc., they cannot be used to update the BSS table.
Add a utility function to check if a frame is a NAN beacon and
use it do return early in cfg80211_inform_bss_frame_data().
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Link: https://patch.msgid.link/20261005084458.3666739-5-ilan.peer@intel.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/ieee80211-nan.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/ieee80211-nan.h b/include/linux/ieee80211-nan.h index 455033955e54..b332a94671ba 100644 --- a/include/linux/ieee80211-nan.h +++ b/include/linux/ieee80211-nan.h @@ -74,4 +74,30 @@ struct ieee80211_nan_anchor_master_info { _attr = (const struct ieee80211_nan_attr *) \ (_attr->data + le16_to_cpu(_attr->length))) +static inline bool ieee80211_is_nan_beacon(const struct ieee80211_mgmt *mgmt, + size_t len) +{ + const struct element *elem; + + /* The NAN IE is at least 6 octets */ + if (len < offsetofend(struct ieee80211_mgmt, u.beacon) + 6) + return false; + + if (!ieee80211_is_beacon(mgmt->frame_control)) + return false; + + /* NAN Cluster IDs range from 50-6F-9A-01-00-00 to 50-6F-9A-01-FF-FF */ + if (get_unaligned_be32(mgmt->bssid) != ((WLAN_OUI_WFA << 8) | 0x01)) + return false; + + elem = (const struct element *)mgmt->u.beacon.variable; + if (elem->id != WLAN_EID_VENDOR_SPECIFIC || + elem->datalen < 4 || + get_unaligned_be32(elem->data) != + (WLAN_OUI_WFA << 8 | WLAN_OUI_TYPE_WFA_NAN)) + return false; + + return true; +} + #endif /* LINUX_IEEE80211_NAN_H */ |