add draft IEEE 802.11n management action frame handling
Several Action frame format are defined to support IEEE 802.11n
features.
This patch adds support to parse Block Ack action frame, then call
low level driver with the frame's body.
Signed-off-by: Mohamed Abbas <mabbas@xxxxxxxxxxxxxxx>
diff -Nupr wireless-dev/include/net/mac80211.h
wireless-dev-new/include/net/mac80211.h
--- wireless-dev/include/net/mac80211.h 2007-03-27 01:34:54.000000000
-0700
+++ wireless-dev-new/include/net/mac80211.h 2007-03-27
02:02:58.000000000 -0700
@@ -734,6 +734,9 @@ struct ieee80211_ops {
int (*get_ht_capab)(struct ieee80211_hw *hw,
struct ieee80211_ht_capability *ht_cap_param);
+ int (*handle_ba_action)(struct ieee80211_hw *hw,
+ struct ieee80211_mgmt *mgmt);
+
u64 (*get_tsf)(struct ieee80211_hw *hw);
/* Reset the TSF timer and allow firmware/hardware to synchronize with
diff -Nupr wireless-dev/net/mac80211/ieee80211_sta.c
wireless-dev-new/net/mac80211/ieee80211_sta.c
--- wireless-dev/net/mac80211/ieee80211_sta.c 2007-03-27
01:34:54.000000000 -0700
+++ wireless-dev-new/net/mac80211/ieee80211_sta.c 2007-03-27
02:02:58.000000000 -0700
@@ -1818,6 +1818,92 @@ static void ieee80211_rx_mgmt_probe_req(
ieee80211_sta_tx(dev, skb, 0);
}
+static void ieee80211_send_addba_resp(struct net_device *dev,
+ struct ieee80211_mgmt *mgmt_src,
+ size_t len,
+ u16 status)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+
+ skb = dev_alloc_skb(sizeof(*mgmt) + 50 );
+ if (!skb) {
+ printk(KERN_DEBUG "%s: failed to allocate buffer "
+ "for addts frame\n", dev->name);
+ return;
+ }
+
+ mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+ memset(mgmt, 0, 24);
+ memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
+ memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+ memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
+ mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
+ IEEE80211_STYPE_ACTION);
+
+ skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
+ mgmt->u.action.category = WLAN_CATEGORY_BACK;
+ mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
+ mgmt->u.action.u.addba_resp.dialog_token =
+ mgmt_src->u.action.u.addba_req.dialog_token;
+ mgmt->u.action.u.addba_resp.capab =
+ mgmt_src->u.action.u.addba_req.capab;
+ mgmt->u.action.u.addba_resp.timeout =
+ mgmt_src->u.action.u.addba_req.timeout;
+ mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
+
+ ieee80211_sta_tx(dev, skb, 0);
+
+ return;
+}
+static void ieee80211_rx_mgmt_action(struct net_device *dev,
+ struct ieee80211_if_sta *ifsta,
+ struct ieee80211_mgmt *mgmt,
+ size_t len)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+
+ if (len < 24 + 1) {
+ printk(KERN_DEBUG "%s: too short (%zd) action frame "
+ "received from " MAC_FMT " - ignored\n",
+ dev->name, len, MAC_ARG(mgmt->sa));
+ return;
+ }
+
+ switch (mgmt->u.action.category) {
+ case WLAN_CATEGORY_BACK:
+ switch (mgmt->u.action.u.addba_req.action_code) {
+ case WLAN_ACTION_ADDBA_REQ:
+ if (!local->ops->handle_ba_action ||
+ (local->ops->handle_ba_action(local_to_hw(local),
+ mgmt)))
+ ieee80211_send_addba_resp(dev, mgmt, len,
+ WLAN_STATUS_REQUEST_DECLINED);
+ else
+ ieee80211_send_addba_resp(dev, mgmt, len,
+ WLAN_STATUS_SUCCESS);
+ break;
+ case WLAN_ACTION_ADDBA_RESP:
+ case WLAN_ACTION_DELBA:
+ if (local->ops->handle_ba_action)
+ local->ops->handle_ba_action(
+ local_to_hw(local), mgmt);
+ break;
+ default:
+ printk(KERN_ERR "%s: recieved back unsupported \n",
+ dev->name);
+ break;
+ }
+ break;
+
+ default:
+ printk(KERN_ERR "%s: unsupported action category %d\n",
+ dev->name, mgmt->u.action.category);
+ break;
+ }
+}
void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
struct ieee80211_rx_status *rx_status)
@@ -1846,6 +1932,7 @@ void ieee80211_sta_rx_mgmt(struct net_de
case IEEE80211_STYPE_REASSOC_RESP:
case IEEE80211_STYPE_DEAUTH:
case IEEE80211_STYPE_DISASSOC:
+ case IEEE80211_STYPE_ACTION:
skb_queue_tail(&ifsta->skb_queue, skb);
schedule_work(&ifsta->work);
return;
@@ -1903,6 +1990,9 @@ static void ieee80211_sta_rx_queued_mgmt
case IEEE80211_STYPE_DISASSOC:
ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
break;
+ case IEEE80211_STYPE_ACTION:
+ ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
+ break;
}
kfree_skb(skb);
-
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