When debugging wireless powersave issues on the AP side it's quite helpful
to see our own beacons that are transmitted by the hardware/driver. However,
this is not that easy since beacons don't pass through the regular TX queues.
Preferably drivers would call ieee80211_tx_status also for tx'ed beacons
but that's not always possible. Hence, just send a copy of each beacon
generated by ieee80211_beacon_get_tim to monitor devices when they are
getting fetched by the driver.
---
net/mac80211/tx.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 84e0e8c..f522579 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -3512,6 +3512,9 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
{
struct ieee80211_mutable_offsets offs = {};
struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
+ struct sk_buff *copy;
+ struct ieee80211_supported_band *sband;
+ int shift;
if (tim_offset)
*tim_offset = offs.tim_offset;
@@ -3519,6 +3522,13 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
if (tim_length)
*tim_length = offs.tim_length;
+ /* send a copy to monitor interfaces */
+ if (hw_to_local(hw)->monitors && (copy = skb_copy(bcn, GFP_ATOMIC))) {
+ shift = ieee80211_vif_get_shift(vif);
+ sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))];
+ ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, true);
+ }
+
return bcn;
}
EXPORT_SYMBOL(ieee80211_beacon_get_tim);
--
1.8.4.5
--
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