#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) */
+#define IEEE80211_MIN_AMPDU_BUF 0x8
+#define IEEE80211_MAX_AMPDU_BUF 0x40
static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
u8 *ssid, size_t ssid_len);
ifsta->flags |= IEEE80211_STA_ASSOCIATED;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (sdata->type != IEEE80211_IF_TYPE_STA)
+ if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
return;
bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
struct ieee80211_mgmt *mgmt;
u16 capab;
- skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
+ skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
+ sizeof(mgmt->u.action.u.addba_resp));
if (!skb) {
printk(KERN_DEBUG "%s: failed to allocate buffer "
"for addba resp frame\n", dev->name);
memset(mgmt, 0, 24);
memcpy(mgmt->da, da, ETH_ALEN);
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
- if (sdata->type == IEEE80211_IF_TYPE_AP)
+ if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
else
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
size_t len)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_hw *hw = &local->hw;
+ struct ieee80211_conf *conf = &hw->conf;
struct sta_info *sta;
- u16 capab, tid, timeout, ba_policy, buf_size, status;
+ struct tid_ampdu_rx *tid_agg_rx;
+ u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
u8 dialog_token;
+ int ret = -EOPNOTSUPP;
+ DECLARE_MAC_BUF(mac);
sta = sta_info_get(local, mgmt->sa);
if (!sta)
/* extract session parameters from addba request frame */
dialog_token = mgmt->u.action.u.addba_req.dialog_token;
timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
+ start_seq_num =
+ le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
- /* TODO - currently aggregation is declined (A-MPDU add BA request
- * acceptance is not obligatory by 802.11n draft), but here is
- * the entry point for dealing with it */
-#ifdef MAC80211_HT_DEBUG
- if (net_ratelimit())
- printk(KERN_DEBUG "Add Block Ack request arrived,"
- " currently denying it\n");
-#endif /* MAC80211_HT_DEBUG */
-
status = WLAN_STATUS_REQUEST_DECLINED;
+ /* sanity check for incoming parameters:
+ * check if configuration can support the BA policy
+ * and if buffer size does not exceeds max value */
+ if (((ba_policy != 1)
+ && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
+ || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
+ status = WLAN_STATUS_INVALID_QOS_PARAM;
+#ifdef CONFIG_MAC80211_HT_DEBUG
+ if (net_ratelimit())
+ printk(KERN_DEBUG "Block Ack Req with bad params from "
+ "%s on tid %u. policy %d, buffer size %d\n",
+ print_mac(mac, mgmt->sa), tid, ba_policy,
+ buf_size);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+ goto end_no_lock;
+ }
+ /* determine default buffer size */
+ if (buf_size == 0) {
+ struct ieee80211_hw_mode *mode = conf->mode;
+ buf_size = IEEE80211_MIN_AMPDU_BUF;
+ buf_size = buf_size << mode->ht_info.ampdu_factor;
+ }
+
+ tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
+
+ /* examine state machine */
+ spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
+
+ if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
+#ifdef CONFIG_MAC80211_HT_DEBUG
+ if (net_ratelimit())
+ printk(KERN_DEBUG "unexpected Block Ack Req from "
+ "%s on tid %u\n",
+ print_mac(mac, mgmt->sa), tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+ goto end;
+ }
+
+ /* prepare reordering buffer */
+ tid_agg_rx->reorder_buf =
+ kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
+ if ((!tid_agg_rx->reorder_buf) && net_ratelimit()) {
+ printk(KERN_ERR "can not allocate reordering buffer "
+ "to tid %d\n", tid);
+ goto end;
+ }
+ memset(tid_agg_rx->reorder_buf, 0,
+ buf_size * sizeof(struct sk_buf *));
+
+ if (local->ops->ampdu_action)
+ ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
+ sta->addr, tid, start_seq_num);
+#ifdef CONFIG_MAC80211_HT_DEBUG
+ printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+
+ if (ret) {
+ kfree(tid_agg_rx->reorder_buf);
+ goto end;
+ }
+
+ /* change state and send addba resp */
+ tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
+ tid_agg_rx->dialog_token = dialog_token;
+ tid_agg_rx->ssn = start_seq_num;
+ tid_agg_rx->head_seq_num = start_seq_num;
+ tid_agg_rx->buf_size = buf_size;
+ tid_agg_rx->timeout = timeout;
+ tid_agg_rx->stored_mpdu_num = 0;
+ status = WLAN_STATUS_SUCCESS;
+end:
+ spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
+
+end_no_lock:
ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
status, 1, buf_size, timeout);
sta_info_put(sta);
}
+void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
+ u16 initiator, u16 reason_code)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ 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;
+ u16 params;
+
+ skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
+ sizeof(mgmt->u.action.u.delba));
+
+ if (!skb) {
+ printk(KERN_ERR "%s: failed to allocate buffer "
+ "for delba frame\n", dev->name);
+ return;
+ }
+
+ skb_reserve(skb, local->hw.extra_tx_headroom);
+ mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+ memset(mgmt, 0, 24);
+ memcpy(mgmt->da, da, ETH_ALEN);
+ memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+ if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
+ memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
+ else
+ 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.delba));
+
+ mgmt->u.action.category = WLAN_CATEGORY_BACK;
+ mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
+ params = (u16)(initiator << 11); /* bit 11 initiator */
+ params |= (u16)(tid << 12); /* bit 15:12 TID number */
+
+ mgmt->u.action.u.delba.params = cpu_to_le16(params);
+ mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
+
+ ieee80211_sta_tx(dev, skb, 0);
+}
+
+void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
+ u16 initiator, u16 reason)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_hw *hw = &local->hw;
+ struct sta_info *sta;
+ int ret, i;
+
+ sta = sta_info_get(local, ra);
+ if (!sta)
+ return;
+
+ /* check if TID is in operational state */
+ spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
+ if (sta->ampdu_mlme.tid_rx[tid].state
+ != HT_AGG_STATE_OPERATIONAL) {
+ spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
+ if (net_ratelimit())
+ printk(KERN_DEBUG "rx BA session requested to stop on "
+ "inactive tid %d\n", tid);
+ sta_info_put(sta);
+ return;
+ }
+ sta->ampdu_mlme.tid_rx[tid].state =
+ HT_AGG_STATE_REQ_STOP_BA_MSK |
+ (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
+ spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
+
+ /* stop HW Rx aggregation. ampdu_action existence
+ * already verified in session init so we add the BUG_ON */
+ BUG_ON(!local->ops->ampdu_action);
+
+ ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
+ ra, tid, EINVAL);
+ if (ret)
+ printk(KERN_DEBUG "HW problem - can not stop rx "
+ "aggergation for tid %d\n", tid);
+
+ /* shutdown timer has not expired */
+ if (initiator != WLAN_BACK_TIMER)
+ del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
+ session_timer);
+
+ /* check if this is a self generated aggregation halt */
+ if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
+ ieee80211_send_delba(dev, ra, tid, 0, reason);
+
+ /* free the reordering buffer */
+ for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
+ if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
+ /* release the reordered frames */
+ dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
+ sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
+ sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
+ }
+ }
+ kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
+
+ sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
+ 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.
+ * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
+ */
+void sta_rx_agg_session_timer_expired(unsigned long data)
+{
+ /* not an elegant detour, but there is no choice as the timer passes
+ * only one argument, and verious sta_info are needed here, so init
+ * flow in sta_info_add gives the TID as data, while the timer_to_id
+ * array gives the sta through container_of */
+ u8 *ptid = (u8 *)data;
+ u8 *timer_to_id = ptid - *ptid;
+ struct sta_info *sta = container_of(timer_to_id, struct sta_info,
+ timer_to_tid[0]);
+
+ printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
+ ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
+ WLAN_BACK_TIMER,
+ WLAN_REASON_QSTA_TIMEOUT);
+}
+
+
static void ieee80211_rx_mgmt_auth(struct net_device *dev,
struct ieee80211_if_sta *ifsta,
struct ieee80211_mgmt *mgmt,
DECLARE_MAC_BUF(mac);
if (ifsta->state != IEEE80211_AUTHENTICATE &&
- sdata->type != IEEE80211_IF_TYPE_IBSS) {
+ sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
printk(KERN_DEBUG "%s: authentication frame received from "
"%s, but not in authenticate state - ignored\n",
dev->name, print_mac(mac, mgmt->sa));
return;
}
- if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
+ if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
printk(KERN_DEBUG "%s: authentication frame received from "
"unknown AP (SA=%s BSSID=%s) - "
return;
}
- if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
+ if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
printk(KERN_DEBUG "%s: authentication frame received from "
"unknown BSSID (SA=%s BSSID=%s) - "
dev->name, print_mac(mac, mgmt->sa), auth_alg,
auth_transaction, status_code);
- if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
+ if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
/* IEEE 802.11 standard does not require authentication in IBSS
* networks and most implementations do not seem to use it.
* However, try to reply to authentication attempts if someone
return;
}
- /* it probably doesn't, but if the frame includes an ERP value then
- * update our stored copy */
- if (elems.erp_info && elems.erp_info_len >= 1) {
- struct ieee80211_sta_bss *bss
- = ieee80211_rx_bss_get(dev, ifsta->bssid,
- local->hw.conf.channel,
- ifsta->ssid, ifsta->ssid_len);
- if (bss) {
- bss->erp_value = elems.erp_info[0];
- bss->has_erp_value = 1;
- ieee80211_rx_bss_put(dev, bss);
- }
- }
-
printk(KERN_DEBUG "%s: associated\n", dev->name);
ifsta->aid = aid;
ifsta->ap_capab = capab_info;
timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
- if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
+ if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
#ifdef CONFIG_MAC80211_IBSS_DEBUG
static unsigned long last_tsf_debug = 0;
ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
- if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
+ if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
(sta = sta_info_get(local, mgmt->sa))) {
struct ieee80211_hw_mode *mode;
ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (sdata->type != IEEE80211_IF_TYPE_STA)
+ if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
return;
ifsta = &sdata->u.sta;
DECLARE_MAC_BUF(mac3);
#endif
- if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
+ if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
ifsta->state != IEEE80211_IBSS_JOINED ||
len < 24 + 2 || !ifsta->probe_resp)
return;
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;
}
if (local->sta_sw_scanning || local->sta_hw_scanning)
return;
- if (sdata->type != IEEE80211_IF_TYPE_STA &&
- sdata->type != IEEE80211_IF_TYPE_IBSS) {
+ if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
+ sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
- "(type=%d)\n", dev->name, sdata->type);
+ "(type=%d)\n", dev->name, sdata->vif.type);
return;
}
ifsta = &sdata->u.sta;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (sdata->type != IEEE80211_IF_TYPE_STA)
+ if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
return;
if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
ifsta->flags |= IEEE80211_STA_SSID_SET;
else
ifsta->flags &= ~IEEE80211_STA_SSID_SET;
- if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
+ if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
!(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
ifsta->ibss_join_req = jiffies;
ifsta->state = IEEE80211_IBSS_SEARCH;
if (sdata->dev == local->mdev)
continue;
- if (sdata->type == IEEE80211_IF_TYPE_STA) {
+ if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
ieee80211_send_nullfunc(local, sdata, 0);
ieee80211_sta_timer((unsigned long)sdata);
done:
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
+ if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
(!ifsta->state == IEEE80211_IBSS_JOINED &&
skip = !(local->enabled_modes & (1 << mode->mode));
chan = &mode->channels[local->scan_channel_idx];
if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
- (sdata->type == IEEE80211_IF_TYPE_IBSS &&
+ (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
!(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
(local->hw_modes & local->enabled_modes &
(1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
continue;
netif_stop_queue(sdata->dev);
- if (sdata->type == IEEE80211_IF_TYPE_STA &&
+ if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
(sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
ieee80211_send_nullfunc(local, sdata, 1);
}
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- if (sdata->type != IEEE80211_IF_TYPE_STA)
+ if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
return ieee80211_sta_start_scan(dev, ssid, ssid_len);
if (local->sta_sw_scanning || local->sta_hw_scanning) {
printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
dev->name, reason);
- if (sdata->type != IEEE80211_IF_TYPE_STA &&
- sdata->type != IEEE80211_IF_TYPE_IBSS)
+ if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
+ sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
return -EINVAL;
ieee80211_send_deauth(dev, ifsta, reason);
printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
dev->name, reason);
- if (sdata->type != IEEE80211_IF_TYPE_STA)
+ if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
return -EINVAL;
if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
projects / linux-2.6 / blobdiff