diff options
Diffstat (limited to 'net/mac80211/ieee80211_sta.c')
| -rw-r--r-- | net/mac80211/ieee80211_sta.c | 182 |
1 files changed, 180 insertions, 2 deletions
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c index d5d5610db1b..c4d57346eac 100644 --- a/net/mac80211/ieee80211_sta.c +++ b/net/mac80211/ieee80211_sta.c @@ -1045,6 +1045,58 @@ static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid, return; } +void ieee80211_send_addba_request(struct net_device *dev, const u8 *da, + u16 tid, u8 dialog_token, u16 start_seq_num, + u16 agg_size, u16 timeout) +{ + 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 capab; + + skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 + + sizeof(mgmt->u.action.u.addba_req)); + + + if (!skb) { + printk(KERN_ERR "%s: failed to allocate buffer " + "for addba request 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.addba_req)); + + mgmt->u.action.category = WLAN_CATEGORY_BACK; + mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; + + mgmt->u.action.u.addba_req.dialog_token = dialog_token; + capab = (u16)(1 << 1); /* bit 1 aggregation policy */ + capab |= (u16)(tid << 2); /* bit 5:2 TID number */ + capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ + + mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); + + mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); + mgmt->u.action.u.addba_req.start_seq_num = + cpu_to_le16(start_seq_num << 4); + + ieee80211_sta_tx(dev, skb, 0); +} + static void ieee80211_sta_process_addba_request(struct net_device *dev, struct ieee80211_mgmt *mgmt, size_t len) @@ -1156,8 +1208,80 @@ end_no_lock: sta_info_put(sta); } -static void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid, - u16 initiator, u16 reason_code) +static void ieee80211_sta_process_addba_resp(struct net_device *dev, + struct ieee80211_mgmt *mgmt, + size_t len) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + struct sta_info *sta; + u16 capab; + u16 tid; + u8 *state; + + sta = sta_info_get(local, mgmt->sa); + if (!sta) + return; + + capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); + tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; + + state = &sta->ampdu_mlme.tid_tx[tid].state; + + spin_lock_bh(&sta->ampdu_mlme.ampdu_tx); + + if (mgmt->u.action.u.addba_resp.dialog_token != + sta->ampdu_mlme.tid_tx[tid].dialog_token) { + spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); +#ifdef CONFIG_MAC80211_HT_DEBUG + printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); +#endif /* CONFIG_MAC80211_HT_DEBUG */ + sta_info_put(sta); + return; + } + + del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer); +#ifdef CONFIG_MAC80211_HT_DEBUG + printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); +#endif /* CONFIG_MAC80211_HT_DEBUG */ + if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) + == WLAN_STATUS_SUCCESS) { + if (!(*state & HT_ADDBA_REQUESTED_MSK)) { + spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); + printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:" + "%d\n", *state); + sta_info_put(sta); + return; + } + + if (*state & HT_ADDBA_RECEIVED_MSK) + printk(KERN_DEBUG "double addBA response\n"); + + *state |= HT_ADDBA_RECEIVED_MSK; + sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0; + + if (*state == HT_AGG_STATE_OPERATIONAL) { + printk(KERN_DEBUG "Aggregation on for tid %d \n", tid); + ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); + } + + spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); + printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid); + } else { + printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid); + + sta->ampdu_mlme.tid_tx[tid].addba_req_num++; + /* this will allow the state check in stop_BA_session */ + *state = HT_AGG_STATE_OPERATIONAL; + spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); + ieee80211_stop_tx_ba_session(hw, sta->addr, tid, + WLAN_BACK_INITIATOR); + } + 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); @@ -1259,6 +1383,7 @@ 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) { @@ -1290,6 +1415,53 @@ static void ieee80211_sta_process_delba(struct net_device *dev, } /* + * After sending add Block Ack request we activated a timer until + * add Block Ack response will arrive from the recipient. + * If this timer expires sta_addba_resp_timer_expired will be executed. + */ +void sta_addba_resp_timer_expired(unsigned long data) +{ + /* not an elegant detour, but there is no choice as the timer passes + * only one argument, and both sta_info and TID are needed, so init + * flow in sta_info_add gives the TID as data, while the timer_to_id + * array gives the sta through container_of */ + u16 tid = *(int *)data; + struct sta_info *temp_sta = container_of((void *)data, + struct sta_info, timer_to_tid[tid]); + + struct ieee80211_local *local = temp_sta->local; + struct ieee80211_hw *hw = &local->hw; + struct sta_info *sta; + u8 *state; + + sta = sta_info_get(local, temp_sta->addr); + if (!sta) + return; + + state = &sta->ampdu_mlme.tid_tx[tid].state; + /* check if the TID waits for addBA response */ + spin_lock_bh(&sta->ampdu_mlme.ampdu_tx); + if (!(*state & HT_ADDBA_REQUESTED_MSK)) { + spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); + *state = HT_AGG_STATE_IDLE; + printk(KERN_DEBUG "timer expired on tid %d but we are not " + "expecting addBA response there", tid); + goto timer_expired_exit; + } + + printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); + + /* go through the state check in stop_BA_session */ + *state = HT_AGG_STATE_OPERATIONAL; + spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); + ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid, + WLAN_BACK_INITIATOR); + +timer_expired_exit: + 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. @@ -2236,6 +2408,12 @@ static void ieee80211_rx_mgmt_action(struct net_device *dev, break; ieee80211_sta_process_addba_request(dev, mgmt, len); break; + case WLAN_ACTION_ADDBA_RESP: + if (len < (IEEE80211_MIN_ACTION_SIZE + + sizeof(mgmt->u.action.u.addba_resp))) + break; + ieee80211_sta_process_addba_resp(dev, mgmt, len); + break; case WLAN_ACTION_DELBA: if (len < (IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.delba))) |