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mac80211: count authorized stations per BSS 

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@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2011-12-14 12:20:31 +01:00 committed by John W. Linville
parent d9a7ddb05e
commit 29623892e1
4 changed files with 20 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/mac80211/debugfs_netdev.c
View File

@ -321,6 +321,7 @@ static ssize_t ieee80211_if_parse_tkip_mic_test(
__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 ieee80211_sub_if_data *sdata)
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);

1
net/mac80211/ieee80211_i.h
View File

@ -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;
};

14
net/mac80211/sta_info.c
View File

@ -1567,17 +1567,21 @@ int sta_info_move_state_checked(struct sta_info *sta,
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:

19
net/mac80211/tx.c
View File

@ -304,17 +304,14 @@ ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
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;