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Linux/net/mac80211/mesh_ps.c

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  1 /*
  2  * Copyright 2012-2013, Marco Porsch <marco.porsch@s2005.tu-chemnitz.de>
  3  * Copyright 2012-2013, cozybit Inc.
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License version 2 as
  7  * published by the Free Software Foundation.
  8  */
  9 
 10 #include "mesh.h"
 11 #include "wme.h"
 12 
 13 
 14 /* mesh PS management */
 15 
 16 /**
 17  * mps_qos_null_get - create pre-addressed QoS Null frame for mesh powersave
 18  */
 19 static struct sk_buff *mps_qos_null_get(struct sta_info *sta)
 20 {
 21         struct ieee80211_sub_if_data *sdata = sta->sdata;
 22         struct ieee80211_local *local = sdata->local;
 23         struct ieee80211_hdr *nullfunc; /* use 4addr header */
 24         struct sk_buff *skb;
 25         int size = sizeof(*nullfunc);
 26         __le16 fc;
 27 
 28         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size + 2);
 29         if (!skb)
 30                 return NULL;
 31         skb_reserve(skb, local->hw.extra_tx_headroom);
 32 
 33         nullfunc = (struct ieee80211_hdr *) skb_put(skb, size);
 34         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
 35         ieee80211_fill_mesh_addresses(nullfunc, &fc, sta->sta.addr,
 36                                       sdata->vif.addr);
 37         nullfunc->frame_control = fc;
 38         nullfunc->duration_id = 0;
 39         nullfunc->seq_ctrl = 0;
 40         /* no address resolution for this frame -> set addr 1 immediately */
 41         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
 42         memset(skb_put(skb, 2), 0, 2); /* append QoS control field */
 43         ieee80211_mps_set_frame_flags(sdata, sta, nullfunc);
 44 
 45         return skb;
 46 }
 47 
 48 /**
 49  * mps_qos_null_tx - send a QoS Null to indicate link-specific power mode
 50  */
 51 static void mps_qos_null_tx(struct sta_info *sta)
 52 {
 53         struct sk_buff *skb;
 54 
 55         skb = mps_qos_null_get(sta);
 56         if (!skb)
 57                 return;
 58 
 59         mps_dbg(sta->sdata, "announcing peer-specific power mode to %pM\n",
 60                 sta->sta.addr);
 61 
 62         /* don't unintentionally start a MPSP */
 63         if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
 64                 u8 *qc = ieee80211_get_qos_ctl((void *) skb->data);
 65 
 66                 qc[0] |= IEEE80211_QOS_CTL_EOSP;
 67         }
 68 
 69         ieee80211_tx_skb(sta->sdata, skb);
 70 }
 71 
 72 /**
 73  * ieee80211_mps_local_status_update - track status of local link-specific PMs
 74  *
 75  * @sdata: local mesh subif
 76  *
 77  * sets the non-peer power mode and triggers the driver PS (re-)configuration
 78  * Return BSS_CHANGED_BEACON if a beacon update is necessary.
 79  */
 80 u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata)
 81 {
 82         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 83         struct sta_info *sta;
 84         bool peering = false;
 85         int light_sleep_cnt = 0;
 86         int deep_sleep_cnt = 0;
 87         u32 changed = 0;
 88         enum nl80211_mesh_power_mode nonpeer_pm;
 89 
 90         rcu_read_lock();
 91         list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
 92                 if (sdata != sta->sdata)
 93                         continue;
 94 
 95                 switch (sta->plink_state) {
 96                 case NL80211_PLINK_OPN_SNT:
 97                 case NL80211_PLINK_OPN_RCVD:
 98                 case NL80211_PLINK_CNF_RCVD:
 99                         peering = true;
100                         break;
101                 case NL80211_PLINK_ESTAB:
102                         if (sta->local_pm == NL80211_MESH_POWER_LIGHT_SLEEP)
103                                 light_sleep_cnt++;
104                         else if (sta->local_pm == NL80211_MESH_POWER_DEEP_SLEEP)
105                                 deep_sleep_cnt++;
106                         break;
107                 default:
108                         break;
109                 }
110         }
111         rcu_read_unlock();
112 
113         /*
114          * Set non-peer mode to active during peering/scanning/authentication
115          * (see IEEE802.11-2012 13.14.8.3). The non-peer mesh power mode is
116          * deep sleep if the local STA is in light or deep sleep towards at
117          * least one mesh peer (see 13.14.3.1). Otherwise, set it to the
118          * user-configured default value.
119          */
120         if (peering) {
121                 mps_dbg(sdata, "setting non-peer PM to active for peering\n");
122                 nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
123         } else if (light_sleep_cnt || deep_sleep_cnt) {
124                 mps_dbg(sdata, "setting non-peer PM to deep sleep\n");
125                 nonpeer_pm = NL80211_MESH_POWER_DEEP_SLEEP;
126         } else {
127                 mps_dbg(sdata, "setting non-peer PM to user value\n");
128                 nonpeer_pm = ifmsh->mshcfg.power_mode;
129         }
130 
131         /* need update if sleep counts move between 0 and non-zero */
132         if (ifmsh->nonpeer_pm != nonpeer_pm ||
133             !ifmsh->ps_peers_light_sleep != !light_sleep_cnt ||
134             !ifmsh->ps_peers_deep_sleep != !deep_sleep_cnt)
135                 changed = BSS_CHANGED_BEACON;
136 
137         ifmsh->nonpeer_pm = nonpeer_pm;
138         ifmsh->ps_peers_light_sleep = light_sleep_cnt;
139         ifmsh->ps_peers_deep_sleep = deep_sleep_cnt;
140 
141         return changed;
142 }
143 
144 /**
145  * ieee80211_mps_set_sta_local_pm - set local PM towards a mesh STA
146  *
147  * @sta: mesh STA
148  * @pm: the power mode to set
149  * Return BSS_CHANGED_BEACON if a beacon update is in order.
150  */
151 u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
152                                    enum nl80211_mesh_power_mode pm)
153 {
154         struct ieee80211_sub_if_data *sdata = sta->sdata;
155 
156         if (sta->local_pm == pm)
157                 return 0;
158 
159         mps_dbg(sdata, "local STA operates in mode %d with %pM\n",
160                 pm, sta->sta.addr);
161 
162         sta->local_pm = pm;
163 
164         /*
165          * announce peer-specific power mode transition
166          * (see IEEE802.11-2012 13.14.3.2 and 13.14.3.3)
167          */
168         if (sta->plink_state == NL80211_PLINK_ESTAB)
169                 mps_qos_null_tx(sta);
170 
171         return ieee80211_mps_local_status_update(sdata);
172 }
173 
174 /**
175  * ieee80211_mps_set_frame_flags - set mesh PS flags in FC (and QoS Control)
176  *
177  * @sdata: local mesh subif
178  * @sta: mesh STA
179  * @hdr: 802.11 frame header
180  *
181  * see IEEE802.11-2012 8.2.4.1.7 and 8.2.4.5.11
182  *
183  * NOTE: sta must be given when an individually-addressed QoS frame header
184  * is handled, for group-addressed and management frames it is not used
185  */
186 void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
187                                    struct sta_info *sta,
188                                    struct ieee80211_hdr *hdr)
189 {
190         enum nl80211_mesh_power_mode pm;
191         u8 *qc;
192 
193         if (WARN_ON(is_unicast_ether_addr(hdr->addr1) &&
194                     ieee80211_is_data_qos(hdr->frame_control) &&
195                     !sta))
196                 return;
197 
198         if (is_unicast_ether_addr(hdr->addr1) &&
199             ieee80211_is_data_qos(hdr->frame_control) &&
200             sta->plink_state == NL80211_PLINK_ESTAB)
201                 pm = sta->local_pm;
202         else
203                 pm = sdata->u.mesh.nonpeer_pm;
204 
205         if (pm == NL80211_MESH_POWER_ACTIVE)
206                 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_PM);
207         else
208                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
209 
210         if (!ieee80211_is_data_qos(hdr->frame_control))
211                 return;
212 
213         qc = ieee80211_get_qos_ctl(hdr);
214 
215         if ((is_unicast_ether_addr(hdr->addr1) &&
216              pm == NL80211_MESH_POWER_DEEP_SLEEP) ||
217             (is_multicast_ether_addr(hdr->addr1) &&
218              sdata->u.mesh.ps_peers_deep_sleep > 0))
219                 qc[1] |= (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8);
220         else
221                 qc[1] &= ~(IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8);
222 }
223 
224 /**
225  * ieee80211_mps_sta_status_update - update buffering status of neighbor STA
226  *
227  * @sta: mesh STA
228  *
229  * called after change of peering status or non-peer/peer-specific power mode
230  */
231 void ieee80211_mps_sta_status_update(struct sta_info *sta)
232 {
233         enum nl80211_mesh_power_mode pm;
234         bool do_buffer;
235 
236         /* For non-assoc STA, prevent buffering or frame transmission */
237         if (sta->sta_state < IEEE80211_STA_ASSOC)
238                 return;
239 
240         /*
241          * use peer-specific power mode if peering is established and the
242          * peer's power mode is known
243          */
244         if (sta->plink_state == NL80211_PLINK_ESTAB &&
245             sta->peer_pm != NL80211_MESH_POWER_UNKNOWN)
246                 pm = sta->peer_pm;
247         else
248                 pm = sta->nonpeer_pm;
249 
250         do_buffer = (pm != NL80211_MESH_POWER_ACTIVE);
251 
252         /* clear the MPSP flags for non-peers or active STA */
253         if (sta->plink_state != NL80211_PLINK_ESTAB) {
254                 clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
255                 clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
256         } else if (!do_buffer) {
257                 clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
258         }
259 
260         /* Don't let the same PS state be set twice */
261         if (test_sta_flag(sta, WLAN_STA_PS_STA) == do_buffer)
262                 return;
263 
264         if (do_buffer) {
265                 set_sta_flag(sta, WLAN_STA_PS_STA);
266                 atomic_inc(&sta->sdata->u.mesh.ps.num_sta_ps);
267                 mps_dbg(sta->sdata, "start PS buffering frames towards %pM\n",
268                         sta->sta.addr);
269         } else {
270                 ieee80211_sta_ps_deliver_wakeup(sta);
271         }
272 }
273 
274 static void mps_set_sta_peer_pm(struct sta_info *sta,
275                                 struct ieee80211_hdr *hdr)
276 {
277         enum nl80211_mesh_power_mode pm;
278         u8 *qc = ieee80211_get_qos_ctl(hdr);
279 
280         /*
281          * Test Power Management field of frame control (PW) and
282          * mesh power save level subfield of QoS control field (PSL)
283          *
284          * | PM | PSL| Mesh PM |
285          * +----+----+---------+
286          * | 0  |Rsrv|  Active |
287          * | 1  | 0  |  Light  |
288          * | 1  | 1  |  Deep   |
289          */
290         if (ieee80211_has_pm(hdr->frame_control)) {
291                 if (qc[1] & (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8))
292                         pm = NL80211_MESH_POWER_DEEP_SLEEP;
293                 else
294                         pm = NL80211_MESH_POWER_LIGHT_SLEEP;
295         } else {
296                 pm = NL80211_MESH_POWER_ACTIVE;
297         }
298 
299         if (sta->peer_pm == pm)
300                 return;
301 
302         mps_dbg(sta->sdata, "STA %pM enters mode %d\n",
303                 sta->sta.addr, pm);
304 
305         sta->peer_pm = pm;
306 
307         ieee80211_mps_sta_status_update(sta);
308 }
309 
310 static void mps_set_sta_nonpeer_pm(struct sta_info *sta,
311                                    struct ieee80211_hdr *hdr)
312 {
313         enum nl80211_mesh_power_mode pm;
314 
315         if (ieee80211_has_pm(hdr->frame_control))
316                 pm = NL80211_MESH_POWER_DEEP_SLEEP;
317         else
318                 pm = NL80211_MESH_POWER_ACTIVE;
319 
320         if (sta->nonpeer_pm == pm)
321                 return;
322 
323         mps_dbg(sta->sdata, "STA %pM sets non-peer mode to %d\n",
324                 sta->sta.addr, pm);
325 
326         sta->nonpeer_pm = pm;
327 
328         ieee80211_mps_sta_status_update(sta);
329 }
330 
331 /**
332  * ieee80211_mps_rx_h_sta_process - frame receive handler for mesh powersave
333  *
334  * @sta: STA info that transmitted the frame
335  * @hdr: IEEE 802.11 (QoS) Header
336  */
337 void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
338                                     struct ieee80211_hdr *hdr)
339 {
340         if (is_unicast_ether_addr(hdr->addr1) &&
341             ieee80211_is_data_qos(hdr->frame_control)) {
342                 /*
343                  * individually addressed QoS Data/Null frames contain
344                  * peer link-specific PS mode towards the local STA
345                  */
346                 mps_set_sta_peer_pm(sta, hdr);
347 
348                 /* check for mesh Peer Service Period trigger frames */
349                 ieee80211_mpsp_trigger_process(ieee80211_get_qos_ctl(hdr),
350                                                sta, false, false);
351         } else {
352                 /*
353                  * can only determine non-peer PS mode
354                  * (see IEEE802.11-2012 8.2.4.1.7)
355                  */
356                 mps_set_sta_nonpeer_pm(sta, hdr);
357         }
358 }
359 
360 
361 /* mesh PS frame release */
362 
363 static void mpsp_trigger_send(struct sta_info *sta, bool rspi, bool eosp)
364 {
365         struct ieee80211_sub_if_data *sdata = sta->sdata;
366         struct sk_buff *skb;
367         struct ieee80211_hdr *nullfunc;
368         struct ieee80211_tx_info *info;
369         u8 *qc;
370 
371         skb = mps_qos_null_get(sta);
372         if (!skb)
373                 return;
374 
375         nullfunc = (struct ieee80211_hdr *) skb->data;
376         if (!eosp)
377                 nullfunc->frame_control |=
378                                 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
379         /*
380          * | RSPI | EOSP |  MPSP triggering   |
381          * +------+------+--------------------+
382          * |  0   |  0   | local STA is owner |
383          * |  0   |  1   | no MPSP (MPSP end) |
384          * |  1   |  0   | both STA are owner |
385          * |  1   |  1   | peer STA is owner  | see IEEE802.11-2012 13.14.9.2
386          */
387         qc = ieee80211_get_qos_ctl(nullfunc);
388         if (rspi)
389                 qc[1] |= (IEEE80211_QOS_CTL_RSPI >> 8);
390         if (eosp)
391                 qc[0] |= IEEE80211_QOS_CTL_EOSP;
392 
393         info = IEEE80211_SKB_CB(skb);
394 
395         info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
396                        IEEE80211_TX_CTL_REQ_TX_STATUS;
397 
398         mps_dbg(sdata, "sending MPSP trigger%s%s to %pM\n",
399                 rspi ? " RSPI" : "", eosp ? " EOSP" : "", sta->sta.addr);
400 
401         ieee80211_tx_skb(sdata, skb);
402 }
403 
404 /**
405  * mpsp_qos_null_append - append QoS Null frame to MPSP skb queue if needed
406  *
407  * To properly end a mesh MPSP the last transmitted frame has to set the EOSP
408  * flag in the QoS Control field. In case the current tailing frame is not a
409  * QoS Data frame, append a QoS Null to carry the flag.
410  */
411 static void mpsp_qos_null_append(struct sta_info *sta,
412                                  struct sk_buff_head *frames)
413 {
414         struct ieee80211_sub_if_data *sdata = sta->sdata;
415         struct sk_buff *new_skb, *skb = skb_peek_tail(frames);
416         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
417         struct ieee80211_tx_info *info;
418 
419         if (ieee80211_is_data_qos(hdr->frame_control))
420                 return;
421 
422         new_skb = mps_qos_null_get(sta);
423         if (!new_skb)
424                 return;
425 
426         mps_dbg(sdata, "appending QoS Null in MPSP towards %pM\n",
427                 sta->sta.addr);
428         /*
429          * This frame has to be transmitted last. Assign lowest priority to
430          * make sure it cannot pass other frames when releasing multiple ACs.
431          */
432         new_skb->priority = 1;
433         skb_set_queue_mapping(new_skb, IEEE80211_AC_BK);
434         ieee80211_set_qos_hdr(sdata, new_skb);
435 
436         info = IEEE80211_SKB_CB(new_skb);
437         info->control.vif = &sdata->vif;
438         info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
439 
440         __skb_queue_tail(frames, new_skb);
441 }
442 
443 /**
444  * mps_frame_deliver - transmit frames during mesh powersave
445  *
446  * @sta: STA info to transmit to
447  * @n_frames: number of frames to transmit. -1 for all
448  */
449 static void mps_frame_deliver(struct sta_info *sta, int n_frames)
450 {
451         struct ieee80211_local *local = sta->sdata->local;
452         int ac;
453         struct sk_buff_head frames;
454         struct sk_buff *skb;
455         bool more_data = false;
456 
457         skb_queue_head_init(&frames);
458 
459         /* collect frame(s) from buffers */
460         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
461                 while (n_frames != 0) {
462                         skb = skb_dequeue(&sta->tx_filtered[ac]);
463                         if (!skb) {
464                                 skb = skb_dequeue(
465                                         &sta->ps_tx_buf[ac]);
466                                 if (skb)
467                                         local->total_ps_buffered--;
468                         }
469                         if (!skb)
470                                 break;
471                         n_frames--;
472                         __skb_queue_tail(&frames, skb);
473                 }
474 
475                 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
476                     !skb_queue_empty(&sta->ps_tx_buf[ac]))
477                         more_data = true;
478         }
479 
480         /* nothing to send? -> EOSP */
481         if (skb_queue_empty(&frames)) {
482                 mpsp_trigger_send(sta, false, true);
483                 return;
484         }
485 
486         /* in a MPSP make sure the last skb is a QoS Data frame */
487         if (test_sta_flag(sta, WLAN_STA_MPSP_OWNER))
488                 mpsp_qos_null_append(sta, &frames);
489 
490         mps_dbg(sta->sdata, "sending %d frames to PS STA %pM\n",
491                 skb_queue_len(&frames), sta->sta.addr);
492 
493         /* prepare collected frames for transmission */
494         skb_queue_walk(&frames, skb) {
495                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
496                 struct ieee80211_hdr *hdr = (void *) skb->data;
497 
498                 /*
499                  * Tell TX path to send this frame even though the
500                  * STA may still remain is PS mode after this frame
501                  * exchange.
502                  */
503                 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
504 
505                 if (more_data || !skb_queue_is_last(&frames, skb))
506                         hdr->frame_control |=
507                                 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
508                 else
509                         hdr->frame_control &=
510                                 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
511 
512                 if (skb_queue_is_last(&frames, skb) &&
513                     ieee80211_is_data_qos(hdr->frame_control)) {
514                         u8 *qoshdr = ieee80211_get_qos_ctl(hdr);
515 
516                         /* MPSP trigger frame ends service period */
517                         *qoshdr |= IEEE80211_QOS_CTL_EOSP;
518                         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
519                 }
520         }
521 
522         ieee80211_add_pending_skbs(local, &frames);
523         sta_info_recalc_tim(sta);
524 }
525 
526 /**
527  * ieee80211_mpsp_trigger_process - track status of mesh Peer Service Periods
528  *
529  * @qc: QoS Control field
530  * @sta: peer to start a MPSP with
531  * @tx: frame was transmitted by the local STA
532  * @acked: frame has been transmitted successfully
533  *
534  * NOTE: active mode STA may only serve as MPSP owner
535  */
536 void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
537                                     bool tx, bool acked)
538 {
539         u8 rspi = qc[1] & (IEEE80211_QOS_CTL_RSPI >> 8);
540         u8 eosp = qc[0] & IEEE80211_QOS_CTL_EOSP;
541 
542         if (tx) {
543                 if (rspi && acked)
544                         set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
545 
546                 if (eosp)
547                         clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
548                 else if (acked &&
549                          test_sta_flag(sta, WLAN_STA_PS_STA) &&
550                          !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER))
551                         mps_frame_deliver(sta, -1);
552         } else {
553                 if (eosp)
554                         clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
555                 else if (sta->local_pm != NL80211_MESH_POWER_ACTIVE)
556                         set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
557 
558                 if (rspi && !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER))
559                         mps_frame_deliver(sta, -1);
560         }
561 }
562 
563 /**
564  * ieee80211_mps_frame_release - release frames buffered due to mesh power save
565  *
566  * @sta: mesh STA
567  * @elems: IEs of beacon or probe response
568  *
569  * For peers if we have individually-addressed frames buffered or the peer
570  * indicates buffered frames, send a corresponding MPSP trigger frame. Since
571  * we do not evaluate the awake window duration, QoS Nulls are used as MPSP
572  * trigger frames. If the neighbour STA is not a peer, only send single frames.
573  */
574 void ieee80211_mps_frame_release(struct sta_info *sta,
575                                  struct ieee802_11_elems *elems)
576 {
577         int ac, buffer_local = 0;
578         bool has_buffered = false;
579 
580         /* TIM map only for LLID <= IEEE80211_MAX_AID */
581         if (sta->plink_state == NL80211_PLINK_ESTAB)
582                 has_buffered = ieee80211_check_tim(elems->tim, elems->tim_len,
583                                 le16_to_cpu(sta->llid) % IEEE80211_MAX_AID);
584 
585         if (has_buffered)
586                 mps_dbg(sta->sdata, "%pM indicates buffered frames\n",
587                         sta->sta.addr);
588 
589         /* only transmit to PS STA with announced, non-zero awake window */
590         if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
591             (!elems->awake_window || !le16_to_cpu(*elems->awake_window)))
592                 return;
593 
594         if (!test_sta_flag(sta, WLAN_STA_MPSP_OWNER))
595                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
596                         buffer_local += skb_queue_len(&sta->ps_tx_buf[ac]) +
597                                         skb_queue_len(&sta->tx_filtered[ac]);
598 
599         if (!has_buffered && !buffer_local)
600                 return;
601 
602         if (sta->plink_state == NL80211_PLINK_ESTAB)
603                 mpsp_trigger_send(sta, has_buffered, !buffer_local);
604         else
605                 mps_frame_deliver(sta, 1);
606 }
607 

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