Create a TIM IE similarly to AP mode and add it to mesh beacons.
Use the peer's link ID instead of the access point's association ID.
Since the TIM map only supports announcing buffered frames for
IEEE80211_MAX_AID STA (2007), we mod down our mesh LLID/PLID to fit.
Signed-off-by: Marco Porsch <marco.porsch@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/tx.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index a62deaf..bfcda52 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2333,6 +2333,31 @@ static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
}
}
+static int mesh_add_tim_ie(struct sk_buff *skb,
+ struct ieee80211_sub_if_data *sdata,
+ u16 *tim_offset, u16 *tim_length)
+{
+ struct ieee80211_local *local = sdata->local;
+ u16 tmp = skb->len;
+
+ if (local->tim_in_locked_section) {
+ ieee80211_beacon_add_tim(sdata, &sdata->u.mesh.ps, skb);
+ } else {
+ unsigned long flags;
+
+ spin_lock_irqsave(&local->tim_lock, flags);
+ ieee80211_beacon_add_tim(sdata, &sdata->u.mesh.ps, skb);
+ spin_unlock_irqrestore(&local->tim_lock, flags);
+ }
+
+ if (tim_offset)
+ *tim_offset = tmp - local->hw.extra_tx_headroom;
+ if (tim_length)
+ *tim_length = skb->len - tmp;
+
+ return 0;
+}
+
struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
u16 *tim_offset, u16 *tim_length)
@@ -2440,6 +2465,7 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
2 + /* NULL SSID */
2 + 8 + /* supported rates */
2 + 3 + /* DS params */
+ 256 + /* TIM IE */
2 + (IEEE80211_MAX_SUPP_RATES - 8) +
2 + sizeof(struct ieee80211_ht_cap) +
2 + sizeof(struct ieee80211_ht_operation) +
@@ -2473,6 +2499,7 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
mesh_add_ds_params_ie(skb, sdata) ||
+ mesh_add_tim_ie(skb, sdata, tim_offset, tim_length) ||
ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
mesh_add_rsn_ie(skb, sdata) ||
mesh_add_ht_cap_ie(skb, sdata) ||
--
1.7.9.5
--
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