mac80211: make BA session handling independent of STA mode
authorJohannes Berg <johannes@sipsolutions.net>
Tue, 9 Sep 2008 12:42:50 +0000 (14:42 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Thu, 11 Sep 2008 19:53:39 +0000 (15:53 -0400)
The aggregation handling isn't dependent on anything related to our
STA-mode implementation, and doesn't need to depend on it for frame
processing. This patch moves the relevant code to ht.c and adds a
hook in rx.c. For now, the relevant action frames are only processed
in STA/IBSS modes, but that's now something we can easily change.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
net/mac80211/ht.c
net/mac80211/ieee80211_i.h
net/mac80211/mlme.c
net/mac80211/rx.c

index c72b3fe3ccdbdfb849236c89d87e75555fe38a85..7e93e1079ade4734e1c747718ba0f9aab17c3245 100644 (file)
@@ -66,9 +66,10 @@ int ieee80211_ht_addt_info_ie_to_ht_bss_info(
        return 0;
 }
 
-void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
-                               u16 tid, u8 dialog_token, u16 start_seq_num,
-                               u16 agg_size, u16 timeout)
+static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
+                                        const u8 *da, u16 tid,
+                                        u8 dialog_token, u16 start_seq_num,
+                                        u16 agg_size, u16 timeout)
 {
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_if_sta *ifsta = &sdata->u.sta;
@@ -115,8 +116,55 @@ void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8
        ieee80211_sta_tx(sdata, skb, 0);
 }
 
-void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
-                         u16 initiator, u16 reason_code)
+static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
+                                     u8 dialog_token, u16 status, u16 policy,
+                                     u16 buf_size, u16 timeout)
+{
+       struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+       struct ieee80211_local *local = sdata->local;
+       struct sk_buff *skb;
+       struct ieee80211_mgmt *mgmt;
+       u16 capab;
+
+       skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
+
+       if (!skb) {
+               printk(KERN_DEBUG "%s: failed to allocate buffer "
+                      "for addba resp frame\n", sdata->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, sdata->dev->dev_addr, ETH_ALEN);
+       if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
+               memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
+       else
+               memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
+       mgmt->frame_control = cpu_to_le16(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 = dialog_token;
+
+       capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
+       capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
+       capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
+
+       mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
+       mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
+       mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
+
+       ieee80211_sta_tx(sdata, skb, 0);
+}
+
+static void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
+                                const u8 *da, u16 tid,
+                                u16 initiator, u16 reason_code)
 {
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_if_sta *ifsta = &sdata->u.sta;
@@ -263,7 +311,7 @@ void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *r
  * 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)
+static 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
@@ -699,3 +747,246 @@ void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
        tasklet_schedule(&local->tasklet);
 }
 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
+
+/*
+ * After accepting the AddBA Request we activated a timer,
+ * resetting it after each frame that arrives from the originator.
+ * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
+ */
+static 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 various sta_info are needed here, so init
+        * flow in sta_info_create 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]);
+
+#ifdef CONFIG_MAC80211_HT_DEBUG
+       printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
+#endif
+       ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
+                                        (u16)*ptid, WLAN_BACK_TIMER,
+                                        WLAN_REASON_QSTA_TIMEOUT);
+}
+
+void ieee80211_process_addba_request(struct ieee80211_local *local,
+                                    struct sta_info *sta,
+                                    struct ieee80211_mgmt *mgmt,
+                                    size_t len)
+{
+       struct ieee80211_hw *hw = &local->hw;
+       struct ieee80211_conf *conf = &hw->conf;
+       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);
+
+       /* 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;
+
+       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 "AddBA 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_supported_band *sband;
+
+               sband = local->hw.wiphy->bands[conf->channel->band];
+               buf_size = IEEE80211_MIN_AMPDU_BUF;
+               buf_size = buf_size << sband->ht_info.ampdu_factor;
+       }
+
+
+       /* examine state machine */
+       spin_lock_bh(&sta->lock);
+
+       if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
+#ifdef CONFIG_MAC80211_HT_DEBUG
+               if (net_ratelimit())
+                       printk(KERN_DEBUG "unexpected AddBA Req from "
+                               "%s on tid %u\n",
+                               print_mac(mac, mgmt->sa), tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+               goto end;
+       }
+
+       /* prepare A-MPDU MLME for Rx aggregation */
+       sta->ampdu_mlme.tid_rx[tid] =
+                       kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
+       if (!sta->ampdu_mlme.tid_rx[tid]) {
+#ifdef CONFIG_MAC80211_HT_DEBUG
+               if (net_ratelimit())
+                       printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
+                                       tid);
+#endif
+               goto end;
+       }
+       /* rx timer */
+       sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
+                               sta_rx_agg_session_timer_expired;
+       sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
+                               (unsigned long)&sta->timer_to_tid[tid];
+       init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
+
+       tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
+
+       /* prepare reordering buffer */
+       tid_agg_rx->reorder_buf =
+               kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
+       if (!tid_agg_rx->reorder_buf) {
+#ifdef CONFIG_MAC80211_HT_DEBUG
+               if (net_ratelimit())
+                       printk(KERN_ERR "can not allocate reordering buffer "
+                              "to tid %d\n", tid);
+#endif
+               kfree(sta->ampdu_mlme.tid_rx[tid]);
+               goto end;
+       }
+       memset(tid_agg_rx->reorder_buf, 0,
+               buf_size * sizeof(struct sk_buff *));
+
+       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 request on tid %d result %d\n", tid, ret);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+
+       if (ret) {
+               kfree(tid_agg_rx->reorder_buf);
+               kfree(tid_agg_rx);
+               sta->ampdu_mlme.tid_rx[tid] = NULL;
+               goto end;
+       }
+
+       /* change state and send addba resp */
+       sta->ampdu_mlme.tid_state_rx[tid] = 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->lock);
+
+end_no_lock:
+       ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
+                                 dialog_token, status, 1, buf_size, timeout);
+}
+
+void ieee80211_process_addba_resp(struct ieee80211_local *local,
+                                 struct sta_info *sta,
+                                 struct ieee80211_mgmt *mgmt,
+                                 size_t len)
+{
+       struct ieee80211_hw *hw = &local->hw;
+       u16 capab;
+       u16 tid;
+       u8 *state;
+
+       capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
+       tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
+
+       state = &sta->ampdu_mlme.tid_state_tx[tid];
+
+       spin_lock_bh(&sta->lock);
+
+       if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
+               spin_unlock_bh(&sta->lock);
+               return;
+       }
+
+       if (mgmt->u.action.u.addba_resp.dialog_token !=
+               sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
+               spin_unlock_bh(&sta->lock);
+#ifdef CONFIG_MAC80211_HT_DEBUG
+               printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+               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) {
+               *state |= HT_ADDBA_RECEIVED_MSK;
+               sta->ampdu_mlme.addba_req_num[tid] = 0;
+
+               if (*state == HT_AGG_STATE_OPERATIONAL)
+                       ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
+
+               spin_unlock_bh(&sta->lock);
+       } else {
+               sta->ampdu_mlme.addba_req_num[tid]++;
+               /* this will allow the state check in stop_BA_session */
+               *state = HT_AGG_STATE_OPERATIONAL;
+               spin_unlock_bh(&sta->lock);
+               ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
+                                            WLAN_BACK_INITIATOR);
+       }
+}
+
+void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
+                            struct sta_info *sta,
+                            struct ieee80211_mgmt *mgmt, size_t len)
+{
+       struct ieee80211_local *local = sdata->local;
+       u16 tid, params;
+       u16 initiator;
+       DECLARE_MAC_BUF(mac);
+
+       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 (%s) tid %d reason code %d\n",
+                       print_mac(mac, mgmt->sa),
+                       initiator ? "initiator" : "recipient", tid,
+                       mgmt->u.action.u.delba.reason_code);
+#endif /* CONFIG_MAC80211_HT_DEBUG */
+
+       if (initiator == WLAN_BACK_INITIATOR)
+               ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
+                                                WLAN_BACK_INITIATOR, 0);
+       else { /* WLAN_BACK_RECIPIENT */
+               spin_lock_bh(&sta->lock);
+               sta->ampdu_mlme.tid_state_tx[tid] =
+                               HT_AGG_STATE_OPERATIONAL;
+               spin_unlock_bh(&sta->lock);
+               ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
+                                            WLAN_BACK_RECIPIENT);
+       }
+}
index b10e70715db05220a92d5a4c3cc1fc0d8d6948ff..60ec7ad27643b4326964bad578281e20662de03c 100644 (file)
@@ -909,22 +909,6 @@ int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
                                      u32 changed);
 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
-int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
-                                  struct ieee80211_ht_info *ht_info);
-int ieee80211_ht_addt_info_ie_to_ht_bss_info(
-                       struct ieee80211_ht_addt_info *ht_add_info_ie,
-                       struct ieee80211_ht_bss_info *bss_info);
-void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
-                                 u16 tid, u8 dialog_token, u16 start_seq_num,
-                                 u16 agg_size, u16 timeout);
-void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
-                               u16 initiator, u16 reason_code);
-void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
-
-void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
-                               u16 tid, u16 initiator, u16 reason);
-void sta_addba_resp_timer_expired(unsigned long data);
-void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
                            struct ieee802_11_elems *elems,
                            enum ieee80211_band band);
@@ -977,6 +961,29 @@ int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 
+/* HT */
+int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
+                                  struct ieee80211_ht_info *ht_info);
+int ieee80211_ht_addt_info_ie_to_ht_bss_info(
+                       struct ieee80211_ht_addt_info *ht_add_info_ie,
+                       struct ieee80211_ht_bss_info *bss_info);
+void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
+
+void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
+                               u16 tid, u16 initiator, u16 reason);
+void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
+void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
+                            struct sta_info *sta,
+                            struct ieee80211_mgmt *mgmt, size_t len);
+void ieee80211_process_addba_resp(struct ieee80211_local *local,
+                                 struct sta_info *sta,
+                                 struct ieee80211_mgmt *mgmt,
+                                 size_t len);
+void ieee80211_process_addba_request(struct ieee80211_local *local,
+                                    struct sta_info *sta,
+                                    struct ieee80211_mgmt *mgmt,
+                                    size_t len);
+
 /* utility functions/constants */
 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 extern const unsigned char rfc1042_header[6];
index c22dcd605e48186bdbabc1e3132bb973943b4fd9..25f90f7ccf3e05693a2c7c7d05935379b0dfe63e 100644 (file)
@@ -445,52 +445,6 @@ static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
        ieee80211_sta_tx(sdata, skb, 0);
 }
 
-static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
-                                       u8 dialog_token, u16 status, u16 policy,
-                                       u16 buf_size, u16 timeout)
-{
-       struct ieee80211_if_sta *ifsta = &sdata->u.sta;
-       struct ieee80211_local *local = sdata->local;
-       struct sk_buff *skb;
-       struct ieee80211_mgmt *mgmt;
-       u16 capab;
-
-       skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
-
-       if (!skb) {
-               printk(KERN_DEBUG "%s: failed to allocate buffer "
-                      "for addba resp frame\n", sdata->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, sdata->dev->dev_addr, ETH_ALEN);
-       if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
-               memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
-       else
-               memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
-       mgmt->frame_control = cpu_to_le16(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 = dialog_token;
-
-       capab = (u16)(policy << 1);     /* bit 1 aggregation policy */
-       capab |= (u16)(tid << 2);       /* bit 5:2 TID number */
-       capab |= (u16)(buf_size << 6);  /* bit 15:6 max size of aggregation */
-
-       mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
-       mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
-       mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
-
-       ieee80211_sta_tx(sdata, skb, 0);
-}
-
 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
                                        struct ieee80211_msrment_ie *request_ie,
                                        const u8 *da, const u8 *bssid,
@@ -1057,278 +1011,6 @@ static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
                            elems.challenge_len + 2, 1);
 }
 
-/*
- * After accepting the AddBA Request we activated a timer,
- * resetting it after each frame that arrives from the originator.
- * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
- */
-static 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 various sta_info are needed here, so init
-        * flow in sta_info_create 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]);
-
-#ifdef CONFIG_MAC80211_HT_DEBUG
-       printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
-#endif
-       ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
-                                        (u16)*ptid, WLAN_BACK_TIMER,
-                                        WLAN_REASON_QSTA_TIMEOUT);
-}
-
-static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
-                                               struct ieee80211_mgmt *mgmt,
-                                               size_t len)
-{
-       struct ieee80211_hw *hw = &local->hw;
-       struct ieee80211_conf *conf = &hw->conf;
-       struct sta_info *sta;
-       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);
-
-       rcu_read_lock();
-
-       sta = sta_info_get(local, mgmt->sa);
-       if (!sta) {
-               rcu_read_unlock();
-               return;
-       }
-
-       /* 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;
-
-       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 "AddBA 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_supported_band *sband;
-
-               sband = local->hw.wiphy->bands[conf->channel->band];
-               buf_size = IEEE80211_MIN_AMPDU_BUF;
-               buf_size = buf_size << sband->ht_info.ampdu_factor;
-       }
-
-
-       /* examine state machine */
-       spin_lock_bh(&sta->lock);
-
-       if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
-#ifdef CONFIG_MAC80211_HT_DEBUG
-               if (net_ratelimit())
-                       printk(KERN_DEBUG "unexpected AddBA Req from "
-                               "%s on tid %u\n",
-                               print_mac(mac, mgmt->sa), tid);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
-               goto end;
-       }
-
-       /* prepare A-MPDU MLME for Rx aggregation */
-       sta->ampdu_mlme.tid_rx[tid] =
-                       kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
-       if (!sta->ampdu_mlme.tid_rx[tid]) {
-#ifdef CONFIG_MAC80211_HT_DEBUG
-               if (net_ratelimit())
-                       printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
-                                       tid);
-#endif
-               goto end;
-       }
-       /* rx timer */
-       sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
-                               sta_rx_agg_session_timer_expired;
-       sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
-                               (unsigned long)&sta->timer_to_tid[tid];
-       init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
-
-       tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
-
-       /* prepare reordering buffer */
-       tid_agg_rx->reorder_buf =
-               kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
-       if (!tid_agg_rx->reorder_buf) {
-#ifdef CONFIG_MAC80211_HT_DEBUG
-               if (net_ratelimit())
-                       printk(KERN_ERR "can not allocate reordering buffer "
-                              "to tid %d\n", tid);
-#endif
-               kfree(sta->ampdu_mlme.tid_rx[tid]);
-               goto end;
-       }
-       memset(tid_agg_rx->reorder_buf, 0,
-               buf_size * sizeof(struct sk_buff *));
-
-       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 request on tid %d result %d\n", tid, ret);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
-
-       if (ret) {
-               kfree(tid_agg_rx->reorder_buf);
-               kfree(tid_agg_rx);
-               sta->ampdu_mlme.tid_rx[tid] = NULL;
-               goto end;
-       }
-
-       /* change state and send addba resp */
-       sta->ampdu_mlme.tid_state_rx[tid] = 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->lock);
-
-end_no_lock:
-       ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
-                                 dialog_token, status, 1, buf_size, timeout);
-       rcu_read_unlock();
-}
-
-static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
-                                            struct ieee80211_mgmt *mgmt,
-                                            size_t len)
-{
-       struct ieee80211_hw *hw = &local->hw;
-       struct sta_info *sta;
-       u16 capab;
-       u16 tid;
-       u8 *state;
-
-       rcu_read_lock();
-
-       sta = sta_info_get(local, mgmt->sa);
-       if (!sta) {
-               rcu_read_unlock();
-               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_state_tx[tid];
-
-       spin_lock_bh(&sta->lock);
-
-       if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
-               spin_unlock_bh(&sta->lock);
-               goto addba_resp_exit;
-       }
-
-       if (mgmt->u.action.u.addba_resp.dialog_token !=
-               sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
-               spin_unlock_bh(&sta->lock);
-#ifdef CONFIG_MAC80211_HT_DEBUG
-               printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
-               goto addba_resp_exit;
-       }
-
-       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) {
-               *state |= HT_ADDBA_RECEIVED_MSK;
-               sta->ampdu_mlme.addba_req_num[tid] = 0;
-
-               if (*state == HT_AGG_STATE_OPERATIONAL)
-                       ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
-
-               spin_unlock_bh(&sta->lock);
-       } else {
-               sta->ampdu_mlme.addba_req_num[tid]++;
-               /* this will allow the state check in stop_BA_session */
-               *state = HT_AGG_STATE_OPERATIONAL;
-               spin_unlock_bh(&sta->lock);
-               ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
-                                            WLAN_BACK_INITIATOR);
-       }
-
-addba_resp_exit:
-       rcu_read_unlock();
-}
-
-static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
-                       struct ieee80211_mgmt *mgmt, size_t len)
-{
-       struct ieee80211_local *local = sdata->local;
-       struct sta_info *sta;
-       u16 tid, params;
-       u16 initiator;
-       DECLARE_MAC_BUF(mac);
-
-       rcu_read_lock();
-
-       sta = sta_info_get(local, mgmt->sa);
-       if (!sta) {
-               rcu_read_unlock();
-               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 (%s) tid %d reason code %d\n",
-                       print_mac(mac, mgmt->sa),
-                       initiator ? "initiator" : "recipient", tid,
-                       mgmt->u.action.u.delba.reason_code);
-#endif /* CONFIG_MAC80211_HT_DEBUG */
-
-       if (initiator == WLAN_BACK_INITIATOR)
-               ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
-                                                WLAN_BACK_INITIATOR, 0);
-       else { /* WLAN_BACK_RECIPIENT */
-               spin_lock_bh(&sta->lock);
-               sta->ampdu_mlme.tid_state_tx[tid] =
-                               HT_AGG_STATE_OPERATIONAL;
-               spin_unlock_bh(&sta->lock);
-               ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
-                                            WLAN_BACK_RECIPIENT);
-       }
-       rcu_read_unlock();
-}
-
 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
                                                struct ieee80211_mgmt *mgmt,
                                                size_t len)
@@ -2207,28 +1889,6 @@ static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
                        break;
                }
                break;
-       case WLAN_CATEGORY_BACK:
-               switch (mgmt->u.action.u.addba_req.action_code) {
-               case WLAN_ACTION_ADDBA_REQ:
-                       if (len < (IEEE80211_MIN_ACTION_SIZE +
-                                  sizeof(mgmt->u.action.u.addba_req)))
-                               break;
-                       ieee80211_sta_process_addba_request(local, 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(local, mgmt, len);
-                       break;
-               case WLAN_ACTION_DELBA:
-                       if (len < (IEEE80211_MIN_ACTION_SIZE +
-                                  sizeof(mgmt->u.action.u.delba)))
-                               break;
-                       ieee80211_sta_process_delba(sdata, mgmt, len);
-                       break;
-               }
-               break;
        case PLINK_CATEGORY:
                if (ieee80211_vif_is_mesh(&sdata->vif))
                        mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
index 7e09b30dd3937508968c1864bb2c414da63aebc7..71cce0bcc5befc1a7d2e31e14887ffc4144ee207 100644 (file)
@@ -1510,6 +1510,65 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
        return RX_CONTINUE;
 }
 
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
+{
+       struct ieee80211_local *local = rx->local;
+       struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
+       struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
+       int len = rx->skb->len;
+
+       if (!ieee80211_is_action(mgmt->frame_control))
+               return RX_CONTINUE;
+
+       if (!rx->sta)
+               return RX_DROP_MONITOR;
+
+       if (!(rx->flags & IEEE80211_RX_RA_MATCH))
+               return RX_DROP_MONITOR;
+
+       /* all categories we currently handle have action_code */
+       if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+               return RX_DROP_MONITOR;
+
+       /*
+        * FIXME: revisit this, I'm sure we should handle most
+        *        of these frames in other modes as well!
+        */
+       if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
+           sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
+               return RX_DROP_MONITOR;
+
+       switch (mgmt->u.action.category) {
+       case WLAN_CATEGORY_BACK:
+               switch (mgmt->u.action.u.addba_req.action_code) {
+               case WLAN_ACTION_ADDBA_REQ:
+                       if (len < (IEEE80211_MIN_ACTION_SIZE +
+                                  sizeof(mgmt->u.action.u.addba_req)))
+                               return RX_DROP_MONITOR;
+                       ieee80211_process_addba_request(local, rx->sta, mgmt, len);
+                       break;
+               case WLAN_ACTION_ADDBA_RESP:
+                       if (len < (IEEE80211_MIN_ACTION_SIZE +
+                                  sizeof(mgmt->u.action.u.addba_resp)))
+                               return RX_DROP_MONITOR;
+                       ieee80211_process_addba_resp(local, rx->sta, mgmt, len);
+                       break;
+               case WLAN_ACTION_DELBA:
+                       if (len < (IEEE80211_MIN_ACTION_SIZE +
+                                  sizeof(mgmt->u.action.u.delba)))
+                               return RX_DROP_MONITOR;
+                       ieee80211_process_delba(sdata, rx->sta, mgmt, len);
+                       break;
+               }
+               rx->sta->rx_packets++;
+               dev_kfree_skb(rx->skb);
+               return RX_QUEUED;
+       }
+
+       return RX_CONTINUE;
+}
+
 static ieee80211_rx_result debug_noinline
 ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
 {
@@ -1689,6 +1748,7 @@ static void ieee80211_invoke_rx_handlers(struct ieee80211_sub_if_data *sdata,
                CALL_RXH(ieee80211_rx_h_mesh_fwding);
        CALL_RXH(ieee80211_rx_h_data)
        CALL_RXH(ieee80211_rx_h_ctrl)
+       CALL_RXH(ieee80211_rx_h_action)
        CALL_RXH(ieee80211_rx_h_mgmt)
 
 #undef CALL_RXH