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authorJouni Malinen <jouni.malinen@atheros.com>2009-12-29 12:59:19 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-01-12 13:50:09 -0500
commite00cfce0cb2a397859607bf515c6de9ce064b64a (patch)
tree038d87e7d90a5bcdd8f689a563221eab883b0546 /net/mac80211/tx.c
parent3dc1de0bf23816ed557ac8addf680cd5ee57e805 (diff)
downloadop-kernel-dev-e00cfce0cb2a397859607bf515c6de9ce064b64a.zip
op-kernel-dev-e00cfce0cb2a397859607bf515c6de9ce064b64a.tar.gz
mac80211: Select lowest rate based on basic rate set in AP mode
If the basic rate set is configured to not include the lowest rate (e.g., basic rate set = 6, 12, 24 Mbps in IEEE 802.11g mode), the AP should not send out broadcast frames at 1 Mbps. This type of configuration can be used to optimize channel usage in cases where there is no need for backwards compatibility with IEEE 802.11b-only devices. In AP mode, mac80211 was unconditionally using the lowest rate for Beacon frames and similarly, with all rate control algorithms that use rate_control_send_low(), the lowest rate ended up being used for all broadcast frames (and all unicast frames that are sent before association). Change this to take into account the basic rate configuration in AP mode, i.e., use the lowest rate in the basic rate set instead of the lowest supported rate when selecting the rate. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/tx.c')
-rw-r--r--net/mac80211/tx.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 140da4a..4961168 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -520,6 +520,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
txrc.skb = tx->skb;
txrc.reported_rate.idx = -1;
txrc.max_rate_idx = tx->sdata->max_ratectrl_rateidx;
+ txrc.ap = tx->sdata->vif.type == NL80211_IFTYPE_AP;
/* set up RTS protection if desired */
if (len > tx->local->hw.wiphy->rts_threshold) {
@@ -2060,6 +2061,7 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
struct beacon_data *beacon;
struct ieee80211_supported_band *sband;
enum ieee80211_band band = local->hw.conf.channel->band;
+ struct ieee80211_tx_rate_control txrc;
sband = local->hw.wiphy->bands[band];
@@ -2167,21 +2169,21 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
info = IEEE80211_SKB_CB(skb);
info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+ info->flags |= IEEE80211_TX_CTL_NO_ACK;
info->band = band;
- /*
- * XXX: For now, always use the lowest rate
- */
- info->control.rates[0].idx = 0;
- info->control.rates[0].count = 1;
- info->control.rates[1].idx = -1;
- info->control.rates[2].idx = -1;
- info->control.rates[3].idx = -1;
- info->control.rates[4].idx = -1;
- BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 5);
+
+ memset(&txrc, 0, sizeof(txrc));
+ txrc.hw = hw;
+ txrc.sband = sband;
+ txrc.bss_conf = &sdata->vif.bss_conf;
+ txrc.skb = skb;
+ txrc.reported_rate.idx = -1;
+ txrc.max_rate_idx = sdata->max_ratectrl_rateidx;
+ txrc.ap = true;
+ rate_control_get_rate(sdata, NULL, &txrc);
info->control.vif = vif;
- info->flags |= IEEE80211_TX_CTL_NO_ACK;
info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
out:
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