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cfg80211: add rfkill support
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / util.c
blob22f63815fb3623d190e772fe388da047a347422e
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wme.h"
33 #include "led.h"
34
35 /* privid for wiphys to determine whether they belong to us or not */
36 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
37
38 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
39 {
40 struct ieee80211_local *local;
41 BUG_ON(!wiphy);
42
43 local = wiphy_priv(wiphy);
44 return &local->hw;
45 }
46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
47
48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
49 enum nl80211_iftype type)
50 {
51 __le16 fc = hdr->frame_control;
52
53 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
54 if (len < 16)
55 return NULL;
56
57 if (ieee80211_is_data(fc)) {
58 if (len < 24) /* drop incorrect hdr len (data) */
59 return NULL;
60
61 if (ieee80211_has_a4(fc))
62 return NULL;
63 if (ieee80211_has_tods(fc))
64 return hdr->addr1;
65 if (ieee80211_has_fromds(fc))
66 return hdr->addr2;
67
68 return hdr->addr3;
69 }
70
71 if (ieee80211_is_mgmt(fc)) {
72 if (len < 24) /* drop incorrect hdr len (mgmt) */
73 return NULL;
74 return hdr->addr3;
75 }
76
77 if (ieee80211_is_ctl(fc)) {
78 if(ieee80211_is_pspoll(fc))
79 return hdr->addr1;
80
81 if (ieee80211_is_back_req(fc)) {
82 switch (type) {
83 case NL80211_IFTYPE_STATION:
84 return hdr->addr2;
85 case NL80211_IFTYPE_AP:
86 case NL80211_IFTYPE_AP_VLAN:
87 return hdr->addr1;
88 default:
89 break; /* fall through to the return */
90 }
91 }
92 }
93
94 return NULL;
95 }
96
97 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
98 {
99 struct sk_buff *skb = tx->skb;
100 struct ieee80211_hdr *hdr;
101
102 do {
103 hdr = (struct ieee80211_hdr *) skb->data;
104 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
105 } while ((skb = skb->next));
106 }
107
108 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
109 int rate, int erp, int short_preamble)
110 {
111 int dur;
112
113 /* calculate duration (in microseconds, rounded up to next higher
114 * integer if it includes a fractional microsecond) to send frame of
115 * len bytes (does not include FCS) at the given rate. Duration will
116 * also include SIFS.
117 *
118 * rate is in 100 kbps, so divident is multiplied by 10 in the
119 * DIV_ROUND_UP() operations.
120 */
121
122 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
123 /*
124 * OFDM:
125 *
126 * N_DBPS = DATARATE x 4
127 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
128 * (16 = SIGNAL time, 6 = tail bits)
129 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
130 *
131 * T_SYM = 4 usec
132 * 802.11a - 17.5.2: aSIFSTime = 16 usec
133 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
134 * signal ext = 6 usec
135 */
136 dur = 16; /* SIFS + signal ext */
137 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
138 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
139 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
140 4 * rate); /* T_SYM x N_SYM */
141 } else {
142 /*
143 * 802.11b or 802.11g with 802.11b compatibility:
144 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
145 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
146 *
147 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
148 * aSIFSTime = 10 usec
149 * aPreambleLength = 144 usec or 72 usec with short preamble
150 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
151 */
152 dur = 10; /* aSIFSTime = 10 usec */
153 dur += short_preamble ? (72 + 24) : (144 + 48);
154
155 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
156 }
157
158 return dur;
159 }
160
161 /* Exported duration function for driver use */
162 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
163 struct ieee80211_vif *vif,
164 size_t frame_len,
165 struct ieee80211_rate *rate)
166 {
167 struct ieee80211_local *local = hw_to_local(hw);
168 struct ieee80211_sub_if_data *sdata;
169 u16 dur;
170 int erp;
171 bool short_preamble = false;
172
173 erp = 0;
174 if (vif) {
175 sdata = vif_to_sdata(vif);
176 short_preamble = sdata->vif.bss_conf.use_short_preamble;
177 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
178 erp = rate->flags & IEEE80211_RATE_ERP_G;
179 }
180
181 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
182 short_preamble);
183
184 return cpu_to_le16(dur);
185 }
186 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
187
188 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
189 struct ieee80211_vif *vif, size_t frame_len,
190 const struct ieee80211_tx_info *frame_txctl)
191 {
192 struct ieee80211_local *local = hw_to_local(hw);
193 struct ieee80211_rate *rate;
194 struct ieee80211_sub_if_data *sdata;
195 bool short_preamble;
196 int erp;
197 u16 dur;
198 struct ieee80211_supported_band *sband;
199
200 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
201
202 short_preamble = false;
203
204 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
205
206 erp = 0;
207 if (vif) {
208 sdata = vif_to_sdata(vif);
209 short_preamble = sdata->vif.bss_conf.use_short_preamble;
210 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
211 erp = rate->flags & IEEE80211_RATE_ERP_G;
212 }
213
214 /* CTS duration */
215 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
216 erp, short_preamble);
217 /* Data frame duration */
218 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
219 erp, short_preamble);
220 /* ACK duration */
221 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
222 erp, short_preamble);
223
224 return cpu_to_le16(dur);
225 }
226 EXPORT_SYMBOL(ieee80211_rts_duration);
227
228 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
229 struct ieee80211_vif *vif,
230 size_t frame_len,
231 const struct ieee80211_tx_info *frame_txctl)
232 {
233 struct ieee80211_local *local = hw_to_local(hw);
234 struct ieee80211_rate *rate;
235 struct ieee80211_sub_if_data *sdata;
236 bool short_preamble;
237 int erp;
238 u16 dur;
239 struct ieee80211_supported_band *sband;
240
241 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
242
243 short_preamble = false;
244
245 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
246 erp = 0;
247 if (vif) {
248 sdata = vif_to_sdata(vif);
249 short_preamble = sdata->vif.bss_conf.use_short_preamble;
250 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
251 erp = rate->flags & IEEE80211_RATE_ERP_G;
252 }
253
254 /* Data frame duration */
255 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
256 erp, short_preamble);
257 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
258 /* ACK duration */
259 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
260 erp, short_preamble);
261 }
262
263 return cpu_to_le16(dur);
264 }
265 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
266
267 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
268 enum queue_stop_reason reason)
269 {
270 struct ieee80211_local *local = hw_to_local(hw);
271
272 if (WARN_ON(queue >= hw->queues))
273 return;
274
275 __clear_bit(reason, &local->queue_stop_reasons[queue]);
276
277 if (!skb_queue_empty(&local->pending[queue]) &&
278 local->queue_stop_reasons[queue] ==
279 BIT(IEEE80211_QUEUE_STOP_REASON_PENDING))
280 tasklet_schedule(&local->tx_pending_tasklet);
281
282 if (local->queue_stop_reasons[queue] != 0)
283 /* someone still has this queue stopped */
284 return;
285
286 netif_wake_subqueue(local->mdev, queue);
287 }
288
289 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
290 enum queue_stop_reason reason)
291 {
292 struct ieee80211_local *local = hw_to_local(hw);
293 unsigned long flags;
294
295 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
296 __ieee80211_wake_queue(hw, queue, reason);
297 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
298 }
299
300 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
301 {
302 ieee80211_wake_queue_by_reason(hw, queue,
303 IEEE80211_QUEUE_STOP_REASON_DRIVER);
304 }
305 EXPORT_SYMBOL(ieee80211_wake_queue);
306
307 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
308 enum queue_stop_reason reason)
309 {
310 struct ieee80211_local *local = hw_to_local(hw);
311
312 if (WARN_ON(queue >= hw->queues))
313 return;
314
315 /*
316 * Only stop if it was previously running, this is necessary
317 * for correct pending packets handling because there we may
318 * start (but not wake) the queue and rely on that.
319 */
320 if (!local->queue_stop_reasons[queue])
321 netif_stop_subqueue(local->mdev, queue);
322
323 __set_bit(reason, &local->queue_stop_reasons[queue]);
324 }
325
326 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
327 enum queue_stop_reason reason)
328 {
329 struct ieee80211_local *local = hw_to_local(hw);
330 unsigned long flags;
331
332 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
333 __ieee80211_stop_queue(hw, queue, reason);
334 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
335 }
336
337 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
338 {
339 ieee80211_stop_queue_by_reason(hw, queue,
340 IEEE80211_QUEUE_STOP_REASON_DRIVER);
341 }
342 EXPORT_SYMBOL(ieee80211_stop_queue);
343
344 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
345 enum queue_stop_reason reason)
346 {
347 struct ieee80211_local *local = hw_to_local(hw);
348 unsigned long flags;
349 int i;
350
351 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
352
353 for (i = 0; i < hw->queues; i++)
354 __ieee80211_stop_queue(hw, i, reason);
355
356 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
357 }
358
359 void ieee80211_stop_queues(struct ieee80211_hw *hw)
360 {
361 ieee80211_stop_queues_by_reason(hw,
362 IEEE80211_QUEUE_STOP_REASON_DRIVER);
363 }
364 EXPORT_SYMBOL(ieee80211_stop_queues);
365
366 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
367 {
368 struct ieee80211_local *local = hw_to_local(hw);
369
370 if (WARN_ON(queue >= hw->queues))
371 return true;
372
373 return __netif_subqueue_stopped(local->mdev, queue);
374 }
375 EXPORT_SYMBOL(ieee80211_queue_stopped);
376
377 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
378 enum queue_stop_reason reason)
379 {
380 struct ieee80211_local *local = hw_to_local(hw);
381 unsigned long flags;
382 int i;
383
384 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
385
386 for (i = 0; i < hw->queues; i++)
387 __ieee80211_wake_queue(hw, i, reason);
388
389 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
390 }
391
392 void ieee80211_wake_queues(struct ieee80211_hw *hw)
393 {
394 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
395 }
396 EXPORT_SYMBOL(ieee80211_wake_queues);
397
398 void ieee80211_iterate_active_interfaces(
399 struct ieee80211_hw *hw,
400 void (*iterator)(void *data, u8 *mac,
401 struct ieee80211_vif *vif),
402 void *data)
403 {
404 struct ieee80211_local *local = hw_to_local(hw);
405 struct ieee80211_sub_if_data *sdata;
406
407 mutex_lock(&local->iflist_mtx);
408
409 list_for_each_entry(sdata, &local->interfaces, list) {
410 switch (sdata->vif.type) {
411 case __NL80211_IFTYPE_AFTER_LAST:
412 case NL80211_IFTYPE_UNSPECIFIED:
413 case NL80211_IFTYPE_MONITOR:
414 case NL80211_IFTYPE_AP_VLAN:
415 continue;
416 case NL80211_IFTYPE_AP:
417 case NL80211_IFTYPE_STATION:
418 case NL80211_IFTYPE_ADHOC:
419 case NL80211_IFTYPE_WDS:
420 case NL80211_IFTYPE_MESH_POINT:
421 break;
422 }
423 if (netif_running(sdata->dev))
424 iterator(data, sdata->dev->dev_addr,
425 &sdata->vif);
426 }
427
428 mutex_unlock(&local->iflist_mtx);
429 }
430 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
431
432 void ieee80211_iterate_active_interfaces_atomic(
433 struct ieee80211_hw *hw,
434 void (*iterator)(void *data, u8 *mac,
435 struct ieee80211_vif *vif),
436 void *data)
437 {
438 struct ieee80211_local *local = hw_to_local(hw);
439 struct ieee80211_sub_if_data *sdata;
440
441 rcu_read_lock();
442
443 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
444 switch (sdata->vif.type) {
445 case __NL80211_IFTYPE_AFTER_LAST:
446 case NL80211_IFTYPE_UNSPECIFIED:
447 case NL80211_IFTYPE_MONITOR:
448 case NL80211_IFTYPE_AP_VLAN:
449 continue;
450 case NL80211_IFTYPE_AP:
451 case NL80211_IFTYPE_STATION:
452 case NL80211_IFTYPE_ADHOC:
453 case NL80211_IFTYPE_WDS:
454 case NL80211_IFTYPE_MESH_POINT:
455 break;
456 }
457 if (netif_running(sdata->dev))
458 iterator(data, sdata->dev->dev_addr,
459 &sdata->vif);
460 }
461
462 rcu_read_unlock();
463 }
464 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
465
466 void ieee802_11_parse_elems(u8 *start, size_t len,
467 struct ieee802_11_elems *elems)
468 {
469 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
470 }
471
472 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
473 struct ieee802_11_elems *elems,
474 u64 filter, u32 crc)
475 {
476 size_t left = len;
477 u8 *pos = start;
478 bool calc_crc = filter != 0;
479
480 memset(elems, 0, sizeof(*elems));
481 elems->ie_start = start;
482 elems->total_len = len;
483
484 while (left >= 2) {
485 u8 id, elen;
486
487 id = *pos++;
488 elen = *pos++;
489 left -= 2;
490
491 if (elen > left)
492 break;
493
494 if (calc_crc && id < 64 && (filter & BIT(id)))
495 crc = crc32_be(crc, pos - 2, elen + 2);
496
497 switch (id) {
498 case WLAN_EID_SSID:
499 elems->ssid = pos;
500 elems->ssid_len = elen;
501 break;
502 case WLAN_EID_SUPP_RATES:
503 elems->supp_rates = pos;
504 elems->supp_rates_len = elen;
505 break;
506 case WLAN_EID_FH_PARAMS:
507 elems->fh_params = pos;
508 elems->fh_params_len = elen;
509 break;
510 case WLAN_EID_DS_PARAMS:
511 elems->ds_params = pos;
512 elems->ds_params_len = elen;
513 break;
514 case WLAN_EID_CF_PARAMS:
515 elems->cf_params = pos;
516 elems->cf_params_len = elen;
517 break;
518 case WLAN_EID_TIM:
519 if (elen >= sizeof(struct ieee80211_tim_ie)) {
520 elems->tim = (void *)pos;
521 elems->tim_len = elen;
522 }
523 break;
524 case WLAN_EID_IBSS_PARAMS:
525 elems->ibss_params = pos;
526 elems->ibss_params_len = elen;
527 break;
528 case WLAN_EID_CHALLENGE:
529 elems->challenge = pos;
530 elems->challenge_len = elen;
531 break;
532 case WLAN_EID_VENDOR_SPECIFIC:
533 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
534 pos[2] == 0xf2) {
535 /* Microsoft OUI (00:50:F2) */
536
537 if (calc_crc)
538 crc = crc32_be(crc, pos - 2, elen + 2);
539
540 if (pos[3] == 1) {
541 /* OUI Type 1 - WPA IE */
542 elems->wpa = pos;
543 elems->wpa_len = elen;
544 } else if (elen >= 5 && pos[3] == 2) {
545 /* OUI Type 2 - WMM IE */
546 if (pos[4] == 0) {
547 elems->wmm_info = pos;
548 elems->wmm_info_len = elen;
549 } else if (pos[4] == 1) {
550 elems->wmm_param = pos;
551 elems->wmm_param_len = elen;
552 }
553 }
554 }
555 break;
556 case WLAN_EID_RSN:
557 elems->rsn = pos;
558 elems->rsn_len = elen;
559 break;
560 case WLAN_EID_ERP_INFO:
561 elems->erp_info = pos;
562 elems->erp_info_len = elen;
563 break;
564 case WLAN_EID_EXT_SUPP_RATES:
565 elems->ext_supp_rates = pos;
566 elems->ext_supp_rates_len = elen;
567 break;
568 case WLAN_EID_HT_CAPABILITY:
569 if (elen >= sizeof(struct ieee80211_ht_cap))
570 elems->ht_cap_elem = (void *)pos;
571 break;
572 case WLAN_EID_HT_INFORMATION:
573 if (elen >= sizeof(struct ieee80211_ht_info))
574 elems->ht_info_elem = (void *)pos;
575 break;
576 case WLAN_EID_MESH_ID:
577 elems->mesh_id = pos;
578 elems->mesh_id_len = elen;
579 break;
580 case WLAN_EID_MESH_CONFIG:
581 elems->mesh_config = pos;
582 elems->mesh_config_len = elen;
583 break;
584 case WLAN_EID_PEER_LINK:
585 elems->peer_link = pos;
586 elems->peer_link_len = elen;
587 break;
588 case WLAN_EID_PREQ:
589 elems->preq = pos;
590 elems->preq_len = elen;
591 break;
592 case WLAN_EID_PREP:
593 elems->prep = pos;
594 elems->prep_len = elen;
595 break;
596 case WLAN_EID_PERR:
597 elems->perr = pos;
598 elems->perr_len = elen;
599 break;
600 case WLAN_EID_CHANNEL_SWITCH:
601 elems->ch_switch_elem = pos;
602 elems->ch_switch_elem_len = elen;
603 break;
604 case WLAN_EID_QUIET:
605 if (!elems->quiet_elem) {
606 elems->quiet_elem = pos;
607 elems->quiet_elem_len = elen;
608 }
609 elems->num_of_quiet_elem++;
610 break;
611 case WLAN_EID_COUNTRY:
612 elems->country_elem = pos;
613 elems->country_elem_len = elen;
614 break;
615 case WLAN_EID_PWR_CONSTRAINT:
616 elems->pwr_constr_elem = pos;
617 elems->pwr_constr_elem_len = elen;
618 break;
619 case WLAN_EID_TIMEOUT_INTERVAL:
620 elems->timeout_int = pos;
621 elems->timeout_int_len = elen;
622 break;
623 default:
624 break;
625 }
626
627 left -= elen;
628 pos += elen;
629 }
630
631 return crc;
632 }
633
634 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
635 {
636 struct ieee80211_local *local = sdata->local;
637 struct ieee80211_tx_queue_params qparam;
638 int queue;
639 bool use_11b;
640 int aCWmin, aCWmax;
641
642 if (!local->ops->conf_tx)
643 return;
644
645 memset(&qparam, 0, sizeof(qparam));
646
647 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
648 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
649
650 for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
651 /* Set defaults according to 802.11-2007 Table 7-37 */
652 aCWmax = 1023;
653 if (use_11b)
654 aCWmin = 31;
655 else
656 aCWmin = 15;
657
658 switch (queue) {
659 case 3: /* AC_BK */
660 qparam.cw_max = aCWmax;
661 qparam.cw_min = aCWmin;
662 qparam.txop = 0;
663 qparam.aifs = 7;
664 break;
665 default: /* never happens but let's not leave undefined */
666 case 2: /* AC_BE */
667 qparam.cw_max = aCWmax;
668 qparam.cw_min = aCWmin;
669 qparam.txop = 0;
670 qparam.aifs = 3;
671 break;
672 case 1: /* AC_VI */
673 qparam.cw_max = aCWmin;
674 qparam.cw_min = (aCWmin + 1) / 2 - 1;
675 if (use_11b)
676 qparam.txop = 6016/32;
677 else
678 qparam.txop = 3008/32;
679 qparam.aifs = 2;
680 break;
681 case 0: /* AC_VO */
682 qparam.cw_max = (aCWmin + 1) / 2 - 1;
683 qparam.cw_min = (aCWmin + 1) / 4 - 1;
684 if (use_11b)
685 qparam.txop = 3264/32;
686 else
687 qparam.txop = 1504/32;
688 qparam.aifs = 2;
689 break;
690 }
691
692 drv_conf_tx(local, queue, &qparam);
693 }
694 }
695
696 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
697 const size_t supp_rates_len,
698 const u8 *supp_rates)
699 {
700 struct ieee80211_local *local = sdata->local;
701 int i, have_higher_than_11mbit = 0;
702
703 /* cf. IEEE 802.11 9.2.12 */
704 for (i = 0; i < supp_rates_len; i++)
705 if ((supp_rates[i] & 0x7f) * 5 > 110)
706 have_higher_than_11mbit = 1;
707
708 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
709 have_higher_than_11mbit)
710 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
711 else
712 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
713
714 ieee80211_set_wmm_default(sdata);
715 }
716
717 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
718 int encrypt)
719 {
720 skb->dev = sdata->local->mdev;
721 skb_set_mac_header(skb, 0);
722 skb_set_network_header(skb, 0);
723 skb_set_transport_header(skb, 0);
724
725 skb->iif = sdata->dev->ifindex;
726 skb->do_not_encrypt = !encrypt;
727
728 dev_queue_xmit(skb);
729 }
730
731 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
732 {
733 int ret = -EINVAL;
734 struct ieee80211_channel *chan;
735 struct ieee80211_local *local = sdata->local;
736
737 chan = ieee80211_get_channel(local->hw.wiphy, freqMHz);
738
739 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
740 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
741 chan->flags & IEEE80211_CHAN_NO_IBSS)
742 return ret;
743 local->oper_channel = chan;
744 local->oper_channel_type = NL80211_CHAN_NO_HT;
745
746 if (local->sw_scanning || local->hw_scanning)
747 ret = 0;
748 else
749 ret = ieee80211_hw_config(
750 local, IEEE80211_CONF_CHANGE_CHANNEL);
751 }
752
753 return ret;
754 }
755
756 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
757 enum ieee80211_band band)
758 {
759 struct ieee80211_supported_band *sband;
760 struct ieee80211_rate *bitrates;
761 u32 mandatory_rates;
762 enum ieee80211_rate_flags mandatory_flag;
763 int i;
764
765 sband = local->hw.wiphy->bands[band];
766 if (!sband) {
767 WARN_ON(1);
768 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
769 }
770
771 if (band == IEEE80211_BAND_2GHZ)
772 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
773 else
774 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
775
776 bitrates = sband->bitrates;
777 mandatory_rates = 0;
778 for (i = 0; i < sband->n_bitrates; i++)
779 if (bitrates[i].flags & mandatory_flag)
780 mandatory_rates |= BIT(i);
781 return mandatory_rates;
782 }
783
784 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
785 u16 transaction, u16 auth_alg,
786 u8 *extra, size_t extra_len,
787 const u8 *bssid, int encrypt)
788 {
789 struct ieee80211_local *local = sdata->local;
790 struct sk_buff *skb;
791 struct ieee80211_mgmt *mgmt;
792
793 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
794 sizeof(*mgmt) + 6 + extra_len);
795 if (!skb) {
796 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
797 "frame\n", sdata->dev->name);
798 return;
799 }
800 skb_reserve(skb, local->hw.extra_tx_headroom);
801
802 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
803 memset(mgmt, 0, 24 + 6);
804 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
805 IEEE80211_STYPE_AUTH);
806 if (encrypt)
807 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
808 memcpy(mgmt->da, bssid, ETH_ALEN);
809 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
810 memcpy(mgmt->bssid, bssid, ETH_ALEN);
811 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
812 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
813 mgmt->u.auth.status_code = cpu_to_le16(0);
814 if (extra)
815 memcpy(skb_put(skb, extra_len), extra, extra_len);
816
817 ieee80211_tx_skb(sdata, skb, encrypt);
818 }
819
820 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
821 const u8 *ie, size_t ie_len)
822 {
823 struct ieee80211_supported_band *sband;
824 u8 *pos, *supp_rates_len, *esupp_rates_len = NULL;
825 int i;
826
827 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
828
829 pos = buffer;
830
831 *pos++ = WLAN_EID_SUPP_RATES;
832 supp_rates_len = pos;
833 *pos++ = 0;
834
835 for (i = 0; i < sband->n_bitrates; i++) {
836 struct ieee80211_rate *rate = &sband->bitrates[i];
837
838 if (esupp_rates_len) {
839 *esupp_rates_len += 1;
840 } else if (*supp_rates_len == 8) {
841 *pos++ = WLAN_EID_EXT_SUPP_RATES;
842 esupp_rates_len = pos;
843 *pos++ = 1;
844 } else
845 *supp_rates_len += 1;
846
847 *pos++ = rate->bitrate / 5;
848 }
849
850 if (sband->ht_cap.ht_supported) {
851 __le16 tmp = cpu_to_le16(sband->ht_cap.cap);
852
853 *pos++ = WLAN_EID_HT_CAPABILITY;
854 *pos++ = sizeof(struct ieee80211_ht_cap);
855 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
856 memcpy(pos, &tmp, sizeof(u16));
857 pos += sizeof(u16);
858 /* TODO: needs a define here for << 2 */
859 *pos++ = sband->ht_cap.ampdu_factor |
860 (sband->ht_cap.ampdu_density << 2);
861 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
862 pos += sizeof(sband->ht_cap.mcs);
863 pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
864 }
865
866 /*
867 * If adding more here, adjust code in main.c
868 * that calculates local->scan_ies_len.
869 */
870
871 if (ie) {
872 memcpy(pos, ie, ie_len);
873 pos += ie_len;
874 }
875
876 return pos - buffer;
877 }
878
879 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
880 const u8 *ssid, size_t ssid_len,
881 const u8 *ie, size_t ie_len)
882 {
883 struct ieee80211_local *local = sdata->local;
884 struct sk_buff *skb;
885 struct ieee80211_mgmt *mgmt;
886 u8 *pos;
887
888 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
889 ie_len);
890 if (!skb) {
891 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
892 "request\n", sdata->dev->name);
893 return;
894 }
895 skb_reserve(skb, local->hw.extra_tx_headroom);
896
897 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
898 memset(mgmt, 0, 24);
899 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
900 IEEE80211_STYPE_PROBE_REQ);
901 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
902 if (dst) {
903 memcpy(mgmt->da, dst, ETH_ALEN);
904 memcpy(mgmt->bssid, dst, ETH_ALEN);
905 } else {
906 memset(mgmt->da, 0xff, ETH_ALEN);
907 memset(mgmt->bssid, 0xff, ETH_ALEN);
908 }
909 pos = skb_put(skb, 2 + ssid_len);
910 *pos++ = WLAN_EID_SSID;
911 *pos++ = ssid_len;
912 memcpy(pos, ssid, ssid_len);
913 pos += ssid_len;
914
915 skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len));
916
917 ieee80211_tx_skb(sdata, skb, 0);
918 }
919
920 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
921 struct ieee802_11_elems *elems,
922 enum ieee80211_band band)
923 {
924 struct ieee80211_supported_band *sband;
925 struct ieee80211_rate *bitrates;
926 size_t num_rates;
927 u32 supp_rates;
928 int i, j;
929 sband = local->hw.wiphy->bands[band];
930
931 if (!sband) {
932 WARN_ON(1);
933 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
934 }
935
936 bitrates = sband->bitrates;
937 num_rates = sband->n_bitrates;
938 supp_rates = 0;
939 for (i = 0; i < elems->supp_rates_len +
940 elems->ext_supp_rates_len; i++) {
941 u8 rate = 0;
942 int own_rate;
943 if (i < elems->supp_rates_len)
944 rate = elems->supp_rates[i];
945 else if (elems->ext_supp_rates)
946 rate = elems->ext_supp_rates
947 [i - elems->supp_rates_len];
948 own_rate = 5 * (rate & 0x7f);
949 for (j = 0; j < num_rates; j++)
950 if (bitrates[j].bitrate == own_rate)
951 supp_rates |= BIT(j);
952 }
953 return supp_rates;
954 }
955
956 int ieee80211_reconfig(struct ieee80211_local *local)
957 {
958 struct ieee80211_hw *hw = &local->hw;
959 struct ieee80211_sub_if_data *sdata;
960 struct ieee80211_if_init_conf conf;
961 struct sta_info *sta;
962 unsigned long flags;
963 int res;
964 bool from_suspend = local->suspended;
965
966 /*
967 * We're going to start the hardware, at that point
968 * we are no longer suspended and can RX frames.
969 */
970 local->suspended = false;
971
972 /* restart hardware */
973 if (local->open_count) {
974 res = drv_start(local);
975
976 ieee80211_led_radio(local, true);
977 }
978
979 /* add interfaces */
980 list_for_each_entry(sdata, &local->interfaces, list) {
981 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
982 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
983 netif_running(sdata->dev)) {
984 conf.vif = &sdata->vif;
985 conf.type = sdata->vif.type;
986 conf.mac_addr = sdata->dev->dev_addr;
987 res = drv_add_interface(local, &conf);
988 }
989 }
990
991 /* add STAs back */
992 if (local->ops->sta_notify) {
993 spin_lock_irqsave(&local->sta_lock, flags);
994 list_for_each_entry(sta, &local->sta_list, list) {
995 sdata = sta->sdata;
996 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
997 sdata = container_of(sdata->bss,
998 struct ieee80211_sub_if_data,
999 u.ap);
1000
1001 drv_sta_notify(local, &sdata->vif, STA_NOTIFY_ADD,
1002 &sta->sta);
1003 }
1004 spin_unlock_irqrestore(&local->sta_lock, flags);
1005 }
1006
1007 /* Clear Suspend state so that ADDBA requests can be processed */
1008
1009 rcu_read_lock();
1010
1011 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1012 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1013 clear_sta_flags(sta, WLAN_STA_SUSPEND);
1014 }
1015 }
1016
1017 rcu_read_unlock();
1018
1019 /* setup RTS threshold */
1020 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1021
1022 /* reconfigure hardware */
1023 ieee80211_hw_config(local, ~0);
1024
1025 netif_addr_lock_bh(local->mdev);
1026 ieee80211_configure_filter(local);
1027 netif_addr_unlock_bh(local->mdev);
1028
1029 /* Finally also reconfigure all the BSS information */
1030 list_for_each_entry(sdata, &local->interfaces, list) {
1031 u32 changed = ~0;
1032 if (!netif_running(sdata->dev))
1033 continue;
1034 switch (sdata->vif.type) {
1035 case NL80211_IFTYPE_STATION:
1036 /* disable beacon change bits */
1037 changed &= ~(BSS_CHANGED_BEACON |
1038 BSS_CHANGED_BEACON_ENABLED);
1039 /* fall through */
1040 case NL80211_IFTYPE_ADHOC:
1041 case NL80211_IFTYPE_AP:
1042 case NL80211_IFTYPE_MESH_POINT:
1043 ieee80211_bss_info_change_notify(sdata, changed);
1044 break;
1045 case NL80211_IFTYPE_WDS:
1046 break;
1047 case NL80211_IFTYPE_AP_VLAN:
1048 case NL80211_IFTYPE_MONITOR:
1049 /* ignore virtual */
1050 break;
1051 case NL80211_IFTYPE_UNSPECIFIED:
1052 case __NL80211_IFTYPE_AFTER_LAST:
1053 WARN_ON(1);
1054 break;
1055 }
1056 }
1057
1058 /* add back keys */
1059 list_for_each_entry(sdata, &local->interfaces, list)
1060 if (netif_running(sdata->dev))
1061 ieee80211_enable_keys(sdata);
1062
1063 ieee80211_wake_queues_by_reason(hw,
1064 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1065
1066 /*
1067 * If this is for hw restart things are still running.
1068 * We may want to change that later, however.
1069 */
1070 if (!from_suspend)
1071 return 0;
1072
1073 #ifdef CONFIG_PM
1074 local->suspended = false;
1075
1076 list_for_each_entry(sdata, &local->interfaces, list) {
1077 switch(sdata->vif.type) {
1078 case NL80211_IFTYPE_STATION:
1079 ieee80211_sta_restart(sdata);
1080 break;
1081 case NL80211_IFTYPE_ADHOC:
1082 ieee80211_ibss_restart(sdata);
1083 break;
1084 case NL80211_IFTYPE_MESH_POINT:
1085 ieee80211_mesh_restart(sdata);
1086 break;
1087 default:
1088 break;
1089 }
1090 }
1091
1092 add_timer(&local->sta_cleanup);
1093
1094 spin_lock_irqsave(&local->sta_lock, flags);
1095 list_for_each_entry(sta, &local->sta_list, list)
1096 mesh_plink_restart(sta);
1097 spin_unlock_irqrestore(&local->sta_lock, flags);
1098 #else
1099 WARN_ON(1);
1100 #endif
1101 return 0;
1102 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree