This can be used by a driver to prepare skbs for transmission, which were
obtained via functions such as ieee80211_probereq_get or
ieee80211_nullfunc_get.
This is useful for drivers that want to send those frames directly, but
need rate control information to be prepared first.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
---
include/net/mac80211.h | 14 ++++++++++++++
net/mac80211/tx.c | 29 +++++++++++++++++++++++++++++
2 files changed, 43 insertions(+)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index f386c48..cf2f32a 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -4567,4 +4567,18 @@ void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
struct cfg80211_wowlan_wakeup *wakeup,
gfp_t gfp);
+/**
+ * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission
+ * @hw: pointer as obtained from ieee80211_alloc_hw()
+ * @vif: virtual interface
+ * @skb: frame to be sent from within the driver
+ * @band: the band to transmit on
+ * @sta: optional pointer to get the station to send the frame to
+ *
+ * Note: must be called under RCU lock
+ */
+bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif, struct sk_buff *skb,
+ int band, struct ieee80211_sta **sta);
+
#endif /* MAC80211_H */
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 9993fcb..4340aa7 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1367,6 +1367,35 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
return 0;
}
+bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif, struct sk_buff *skb,
+ int band, struct ieee80211_sta **sta)
+{
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_tx_data tx;
+
+ if (ieee80211_tx_prepare(sdata, &tx, skb) == TX_DROP)
+ return false;
+
+ info->band = band;
+ info->control.vif = vif;
+ info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
+
+ if (invoke_tx_handlers(&tx))
+ return false;
+
+ if (sta) {
+ if (tx.sta)
+ *sta = &tx.sta->sta;
+ else
+ *sta = NULL;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
+
/*
* Returns false if the frame couldn't be transmitted but was queued instead.
*/
--
1.8.0.2
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