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mac80211: A-MPDU Rx handling DELBA requests 

This patch opens the flow to DELBA management frames, and handles end
of A-MPDU session produced by this event.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ron Rindjunsky 2007-12-25 17:00:37 +02:00 committed by David S. Miller
parent 713647169e
commit 688b88a488
1 changed files with 39 additions and 1 deletions
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40
net/mac80211/ieee80211_sta.c
View File

@ -63,6 +63,8 @@
#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
/* next values represent the buffer size for A-MPDU frame.
* According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
@ -1264,6 +1266,36 @@ void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
sta_info_put(sta);
}
static void ieee80211_sta_process_delba(struct net_device *dev,
struct ieee80211_mgmt *mgmt, size_t len)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sta_info *sta;
u16 tid, params;
u16 initiator;
DECLARE_MAC_BUF(mac);
sta = sta_info_get(local, mgmt->sa);
if (!sta)
return;
params = le16_to_cpu(mgmt->u.action.u.delba.params);
tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
#ifdef CONFIG_MAC80211_HT_DEBUG
if (net_ratelimit())
printk(KERN_DEBUG "delba from %s on tid %d reason code %d\n",
print_mac(mac, mgmt->sa), tid,
mgmt->u.action.u.delba.reason_code);
#endif /* CONFIG_MAC80211_HT_DEBUG */
if (initiator == WLAN_BACK_INITIATOR)
ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
WLAN_BACK_INITIATOR, 0);
sta_info_put(sta);
}
/*
* After receiving Block Ack Request (BAR) we activated a
* timer after each frame arrives from the originator.
@ -2204,9 +2236,15 @@ static void ieee80211_rx_mgmt_action(struct net_device *dev,
break;
ieee80211_sta_process_addba_request(dev, mgmt, len);
break;
case WLAN_ACTION_DELBA:
if (len < (IEEE80211_MIN_ACTION_SIZE +
sizeof(mgmt->u.action.u.delba)))
break;
ieee80211_sta_process_delba(dev, mgmt, len);
break;
default:
if (net_ratelimit())
printk(KERN_DEBUG "%s: received unsupported BACK\n",
printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
dev->name);
break;
}