From: Johannes Berg <johannes.berg@xxxxxxxxx>
Currently, each AP interface will send multicast
traffic if any interface has a station entry even
if that station entry is allocated only. With the
new station state management we can easily fix it
by adding a counter that counts each authorized
station only and send multicast traffic only when
the correct interface has at least one authorized
station.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
net/mac80211/debugfs_netdev.c | 2 ++
net/mac80211/ieee80211_i.h | 1 +
net/mac80211/sta_info.c | 14 +++++++++-----
net/mac80211/tx.c | 19 ++++++++-----------
4 files changed, 20 insertions(+), 16 deletions(-)
--- a/net/mac80211/debugfs_netdev.c 2011-12-13 20:30:53.000000000 +0100
+++ b/net/mac80211/debugfs_netdev.c 2011-12-13 20:31:16.000000000 +0100
@@ -321,6 +321,7 @@ static ssize_t ieee80211_if_parse_tkip_m
__IEEE80211_IF_FILE_W(tkip_mic_test);
/* AP attributes */
+IEEE80211_IF_FILE(num_sta_authorized, u.ap.num_sta_authorized, ATOMIC);
IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
@@ -458,6 +459,7 @@ static void add_ap_files(struct ieee8021
DEBUGFS_ADD(rc_rateidx_mask_2ghz);
DEBUGFS_ADD(rc_rateidx_mask_5ghz);
+ DEBUGFS_ADD(num_sta_authorized);
DEBUGFS_ADD(num_sta_ps);
DEBUGFS_ADD(dtim_count);
DEBUGFS_ADD(num_buffered_multicast);
--- a/net/mac80211/ieee80211_i.h 2011-12-13 20:30:53.000000000 +0100
+++ b/net/mac80211/ieee80211_i.h 2011-12-13 20:31:16.000000000 +0100
@@ -243,6 +243,7 @@ struct ieee80211_if_ap {
u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
struct sk_buff_head ps_bc_buf;
atomic_t num_sta_ps; /* number of stations in PS mode */
+ atomic_t num_sta_authorized; /* number of authorized stations */
int dtim_count;
bool dtim_bc_mc;
};
--- a/net/mac80211/sta_info.c 2011-12-13 20:31:16.000000000 +0100
+++ b/net/mac80211/sta_info.c 2011-12-13 20:31:16.000000000 +0100
@@ -1542,17 +1542,21 @@ int sta_info_move_state_checked(struct s
return -EINVAL;
break;
case IEEE80211_STA_ASSOC:
- if (sta->sta_state == IEEE80211_STA_AUTH)
+ if (sta->sta_state == IEEE80211_STA_AUTH) {
set_bit(WLAN_STA_ASSOC, &sta->_flags);
- else if (sta->sta_state == IEEE80211_STA_AUTHORIZED)
+ } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
+ if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
+ atomic_dec(&sta->sdata->u.ap.num_sta_authorized);
clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
- else
+ } else
return -EINVAL;
break;
case IEEE80211_STA_AUTHORIZED:
- if (sta->sta_state == IEEE80211_STA_ASSOC)
+ if (sta->sta_state == IEEE80211_STA_ASSOC) {
+ if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
+ atomic_inc(&sta->sdata->u.ap.num_sta_authorized);
set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
- else
+ } else
return -EINVAL;
break;
default:
--- a/net/mac80211/tx.c 2011-12-13 20:30:53.000000000 +0100
+++ b/net/mac80211/tx.c 2011-12-13 20:31:16.000000000 +0100
@@ -304,17 +304,14 @@ ieee80211_tx_h_check_assoc(struct ieee80
I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
return TX_DROP;
}
- } else {
- if (unlikely(ieee80211_is_data(hdr->frame_control) &&
- tx->local->num_sta == 0 &&
- tx->sdata->vif.type != NL80211_IFTYPE_ADHOC)) {
- /*
- * No associated STAs - no need to send multicast
- * frames.
- */
- return TX_DROP;
- }
- return TX_CONTINUE;
+ } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
+ ieee80211_is_data(hdr->frame_control) &&
+ !atomic_read(&tx->sdata->u.ap.num_sta_authorized))) {
+ /*
+ * No associated STAs - no need to send multicast
+ * frames.
+ */
+ return TX_DROP;
}
return TX_CONTINUE;
--
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