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authorJohannes Berg <johannes@sipsolutions.net>2009-10-29 10:30:35 +0300
committerJohn W. Linville <linville@tuxdriver.com>2009-10-30 23:50:39 +0300
commiteddcbb94f75c3e8944503e9f13c1d29acd0d7052 (patch)
treeb5e4786dbafccea91d7ec42cb9e84af655414aca /net/mac80211/tx.c
parent750266646befe42ee8a3a9f9b6f692174635c5b8 (diff)
downloadlinux-eddcbb94f75c3e8944503e9f13c1d29acd0d7052.tar.xz
mac80211: introduce ieee80211_beacon_get_tim()
Compared to ieee80211_beacon_get(), the new function ieee80211_beacon_get_tim() returns information on the location and length of the TIM IE, which some drivers need in order to generate the TIM on the device. The old function, ieee80211_beacon_get(), becomes a small static inline wrapper around the new one to not break all drivers. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/tx.c')
-rw-r--r--net/mac80211/tx.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index cb06d8e56496..8595d14c774c 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2012,8 +2012,9 @@ static void ieee80211_beacon_add_tim(struct ieee80211_if_ap *bss,
}
}
-struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif)
+struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ u16 *tim_offset, u16 *tim_length)
{
struct ieee80211_local *local = hw_to_local(hw);
struct sk_buff *skb = NULL;
@@ -2030,6 +2031,11 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
sdata = vif_to_sdata(vif);
+ if (tim_offset)
+ *tim_offset = 0;
+ if (tim_length)
+ *tim_length = 0;
+
if (sdata->vif.type == NL80211_IFTYPE_AP) {
ap = &sdata->u.ap;
beacon = rcu_dereference(ap->beacon);
@@ -2065,6 +2071,11 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
spin_unlock_irqrestore(&local->sta_lock, flags);
}
+ if (tim_offset)
+ *tim_offset = beacon->head_len;
+ if (tim_length)
+ *tim_length = skb->len - beacon->head_len;
+
if (beacon->tail)
memcpy(skb_put(skb, beacon->tail_len),
beacon->tail, beacon->tail_len);
@@ -2141,7 +2152,7 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
rcu_read_unlock();
return skb;
}
-EXPORT_SYMBOL(ieee80211_beacon_get);
+EXPORT_SYMBOL(ieee80211_beacon_get_tim);
void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
const void *frame, size_t frame_len,