wifi: mac80211: Add support for IEEE 802.1X authentication protocol in non-AP STA mode

Add support for the IEEE 802.1X authentication protocol in non-AP STA
mode, as specified in "IEEE P802.11bi/D4.0, 12.16.5".

IEEE 802.1X authentication involves multiple Authentication frame
exchanges, with the non-AP STA and AP alternating transaction
sequence numbers. The number of Authentication frame exchanges
depends on the EAP method in use. For IEEE 802.1X authentication,
process only Authentication frames with the expected transaction
sequence number.

For IEEE 802.1X Authentication, Table 9-71 specifies that the
Encapsulation Length field as specified in Clause 9.4.1.82 shall be
present in all IEEE 802.1X Authentication frames. Drop the frame in
the mac80211 if the Encapsulation Length field is missing.

After receiving the final Authentication frame with status code
WLAN_STATUS_8021X_AUTH_SUCCESS from the AP, mac80211 marks the state
as authenticated, as it indicates the EAP handshake has completed
successfully over the Authentication frames as specified in
Clause 12.16.5.

In the PMKSA caching case, only two Authentication frames are
exchanged if the AP identifies a valid PMKSA, then as specified
in Clause 12.16.8.3, the AP shall set the Status Code to
WLAN_STATUS_SUCCESS in the final Authentication frame and must not
include an encapsulated EAPOL PDU. This frame will be the final
Authentication frame from the AP when PMKSA caching is enabled,
and mac80211 marks the state as authenticated.

In case of authentication success or failure, forward the
Authentication frame to userspace(e.g. wpa_supplicant), and let
userspace validate the Authentication frame from the AP as per the
specification.

Signed-off-by: Kavita Kavita <kavita.kavita@oss.qualcomm.com>
Link: https://patch.msgid.link/20260226185553.1516290-5-kavita.kavita@oss.qualcomm.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

0 files changed, 0 insertions, 0 deletions