mac80211: add ieee80211_tx_prepare_skb() helper function
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@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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@ -4571,4 +4571,18 @@ void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
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struct cfg80211_wowlan_wakeup *wakeup,
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struct cfg80211_wowlan_wakeup *wakeup,
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gfp_t gfp);
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gfp_t gfp);
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/**
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* ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission
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* @hw: pointer as obtained from ieee80211_alloc_hw()
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* @vif: virtual interface
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* @skb: frame to be sent from within the driver
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* @band: the band to transmit on
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* @sta: optional pointer to get the station to send the frame to
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*
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* Note: must be called under RCU lock
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*/
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bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif, struct sk_buff *skb,
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int band, struct ieee80211_sta **sta);
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#endif /* MAC80211_H */
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#endif /* MAC80211_H */
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@ -1366,6 +1366,35 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
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return 0;
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return 0;
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}
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}
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bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif, struct sk_buff *skb,
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int band, struct ieee80211_sta **sta)
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{
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struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ieee80211_tx_data tx;
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if (ieee80211_tx_prepare(sdata, &tx, skb) == TX_DROP)
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return false;
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info->band = band;
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info->control.vif = vif;
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info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
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if (invoke_tx_handlers(&tx))
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return false;
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if (sta) {
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if (tx.sta)
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*sta = &tx.sta->sta;
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else
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*sta = NULL;
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}
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return true;
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}
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EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
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/*
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/*
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* Returns false if the frame couldn't be transmitted but was queued instead.
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* Returns false if the frame couldn't be transmitted but was queued instead.
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*/
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*/
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