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| author | Mathy Vanhoef <Mathy.Vanhoef@kuleuven.be> | 2020-11-04 07:18:21 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2020-11-06 11:02:42 +0100 |
| commit | 527d675969a1dff17baa270d4447ac1c87058299 (patch) | |
| tree | 54bdfabe6d94f49f43bb72c618efb9c80e2d8156 /net/mac80211/wme.c | |
| parent | mac80211: adhere to Tx control flag that prevents frame reordering (diff) | |
| download | linux-527d675969a1dff17baa270d4447ac1c87058299.tar.xz linux-527d675969a1dff17baa270d4447ac1c87058299.zip | |
mac80211: don't overwrite QoS TID of injected frames
Currently ieee80211_set_qos_hdr sets the QoS TID of all frames based
on the value assigned to skb->priority. This means it will also
overwrite the QoS TID of injected frames. The commit 753ffad3d624
("mac80211: fix TID field in monitor mode transmit") prevented
injected frames from being modified because of this by setting
skb->priority to the TID of the injected frame, which assured the
QoS TID will not be changed to a different value. Unfortunately,
this workaround complicates the handling of injected frames because
we can't set skb->priority without affecting the TID value in the
QoS field of injected frames.
To avoid this, and to simplify the next patch, detect if a frame is
injected in ieee80211_set_qos_hdr and if so do not change its QoS
field.
Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@kuleuven.be>
Link: https://lore.kernel.org/r/20201104061823.197407-4-Mathy.Vanhoef@kuleuven.be
[fix typos in commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/wme.c')
| -rw-r--r-- | net/mac80211/wme.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c index 3d7dea387e3d..2702d314ef59 100644 --- a/net/mac80211/wme.c +++ b/net/mac80211/wme.c @@ -252,6 +252,14 @@ void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata, p = ieee80211_get_qos_ctl(hdr); + /* don't overwrite the QoS field of injected frames */ + if (info->flags & IEEE80211_TX_CTL_INJECTED) { + /* do take into account Ack policy of injected frames */ + if (*p & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) + info->flags |= IEEE80211_TX_CTL_NO_ACK; + return; + } + /* set up the first byte */ /* |