Commit de1ede7a authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

mac80211: make BA session handling independent of STA mode 



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: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 5825fe10

net/mac80211/ht.c

+297 −6
Original line number Diff line number Diff line
@@ -66,8 +66,9 @@ 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,

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;
@@ -115,7 +116,54 @@ 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,

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;
@@ -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);

	}

}

net/mac80211/ieee80211_i.h

+23 −16
Original line number Diff line number Diff line
@@ -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];

net/mac80211/mlme.c

+0 −340
Original line number Diff line number Diff line
@@ -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);

net/mac80211/rx.c

+60 −0

File changed.

Preview size limit exceeded, changes collapsed.

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