diff options
| author | Felix Fietkau <nbd@nbd.name> | 2023-02-13 11:08:55 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2023-02-14 12:35:02 +0100 |
| commit | 6e4c0d0460bd32ca9244dff3ba2d2da27235de11 (patch) | |
| tree | 6ccf602edcd5b9b794e89eed86dd0fc5c7287de9 /include/net | |
| parent | 986e43b19ae9176093da35e0a844e65c8bf9ede7 (diff) | |
wifi: mac80211: add a workaround for receiving non-standard mesh A-MSDU
At least ath10k and ath11k supported hardware (maybe more) does not implement
mesh A-MSDU aggregation in a standard compliant way.
802.11-2020 9.3.2.2.2 declares that the Mesh Control field is part of the
A-MSDU header (and little-endian).
As such, its length must not be included in the subframe length field.
Hardware affected by this bug treats the mesh control field as part of the
MSDU data and sets the length accordingly.
In order to avoid packet loss, keep track of which stations are affected
by this and take it into account when converting A-MSDU to 802.3 + mesh control
packets.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20230213100855.34315-5-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/cfg80211.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index c506dc128685..9b015bb877db 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -6237,6 +6237,19 @@ static inline int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, } /** + * ieee80211_is_valid_amsdu - check if subframe lengths of an A-MSDU are valid + * + * This is used to detect non-standard A-MSDU frames, e.g. the ones generated + * by ath10k and ath11k, where the subframe length includes the length of the + * mesh control field. + * + * @skb: The input A-MSDU frame without any headers. + * @mesh_hdr: use standard compliant mesh A-MSDU subframe header + * Returns: true if subframe header lengths are valid for the @mesh_hdr mode + */ +bool ieee80211_is_valid_amsdu(struct sk_buff *skb, bool mesh_hdr); + +/** * ieee80211_amsdu_to_8023s - decode an IEEE 802.11n A-MSDU frame * * Decode an IEEE 802.11 A-MSDU and convert it to a list of 802.3 frames. |