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Now it works.
[cbs-scheduler.git] / net / mac80211 / util.c
blobfb89e1d0aa0330ad893888c37697e6932bda47ec
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 <net/net_namespace.h>
24 #include <net/cfg80211.h>
25 #include <net/rtnetlink.h>
26
27 #include "ieee80211_i.h"
28 #include "rate.h"
29 #include "mesh.h"
30 #include "wme.h"
31
32 /* privid for wiphys to determine whether they belong to us or not */
33 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
34
35 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
36 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
37 const unsigned char rfc1042_header[] __aligned(2) =
38 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
39
40 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
41 const unsigned char bridge_tunnel_header[] __aligned(2) =
42 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
43
44
45 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
46 enum nl80211_iftype type)
47 {
48 __le16 fc = hdr->frame_control;
49
50 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
51 if (len < 16)
52 return NULL;
53
54 if (ieee80211_is_data(fc)) {
55 if (len < 24) /* drop incorrect hdr len (data) */
56 return NULL;
57
58 if (ieee80211_has_a4(fc))
59 return NULL;
60 if (ieee80211_has_tods(fc))
61 return hdr->addr1;
62 if (ieee80211_has_fromds(fc))
63 return hdr->addr2;
64
65 return hdr->addr3;
66 }
67
68 if (ieee80211_is_mgmt(fc)) {
69 if (len < 24) /* drop incorrect hdr len (mgmt) */
70 return NULL;
71 return hdr->addr3;
72 }
73
74 if (ieee80211_is_ctl(fc)) {
75 if(ieee80211_is_pspoll(fc))
76 return hdr->addr1;
77
78 if (ieee80211_is_back_req(fc)) {
79 switch (type) {
80 case NL80211_IFTYPE_STATION:
81 return hdr->addr2;
82 case NL80211_IFTYPE_AP:
83 case NL80211_IFTYPE_AP_VLAN:
84 return hdr->addr1;
85 default:
86 break; /* fall through to the return */
87 }
88 }
89 }
90
91 return NULL;
92 }
93
94 unsigned int ieee80211_hdrlen(__le16 fc)
95 {
96 unsigned int hdrlen = 24;
97
98 if (ieee80211_is_data(fc)) {
99 if (ieee80211_has_a4(fc))
100 hdrlen = 30;
101 if (ieee80211_is_data_qos(fc))
102 hdrlen += IEEE80211_QOS_CTL_LEN;
103 goto out;
104 }
105
106 if (ieee80211_is_ctl(fc)) {
107 /*
108 * ACK and CTS are 10 bytes, all others 16. To see how
109 * to get this condition consider
110 * subtype mask: 0b0000000011110000 (0x00F0)
111 * ACK subtype: 0b0000000011010000 (0x00D0)
112 * CTS subtype: 0b0000000011000000 (0x00C0)
113 * bits that matter: ^^^ (0x00E0)
114 * value of those: 0b0000000011000000 (0x00C0)
115 */
116 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
117 hdrlen = 10;
118 else
119 hdrlen = 16;
120 }
121 out:
122 return hdrlen;
123 }
124 EXPORT_SYMBOL(ieee80211_hdrlen);
125
126 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
127 {
128 const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data;
129 unsigned int hdrlen;
130
131 if (unlikely(skb->len < 10))
132 return 0;
133 hdrlen = ieee80211_hdrlen(hdr->frame_control);
134 if (unlikely(hdrlen > skb->len))
135 return 0;
136 return hdrlen;
137 }
138 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
139
140 int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
141 {
142 int ae = meshhdr->flags & IEEE80211S_FLAGS_AE;
143 /* 7.1.3.5a.2 */
144 switch (ae) {
145 case 0:
146 return 6;
147 case 1:
148 return 12;
149 case 2:
150 return 18;
151 case 3:
152 return 24;
153 default:
154 return 6;
155 }
156 }
157
158 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
159 {
160 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
161
162 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
163 if (tx->extra_frag) {
164 struct ieee80211_hdr *fhdr;
165 int i;
166 for (i = 0; i < tx->num_extra_frag; i++) {
167 fhdr = (struct ieee80211_hdr *)
168 tx->extra_frag[i]->data;
169 fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
170 }
171 }
172 }
173
174 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
175 int rate, int erp, int short_preamble)
176 {
177 int dur;
178
179 /* calculate duration (in microseconds, rounded up to next higher
180 * integer if it includes a fractional microsecond) to send frame of
181 * len bytes (does not include FCS) at the given rate. Duration will
182 * also include SIFS.
183 *
184 * rate is in 100 kbps, so divident is multiplied by 10 in the
185 * DIV_ROUND_UP() operations.
186 */
187
188 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
189 /*
190 * OFDM:
191 *
192 * N_DBPS = DATARATE x 4
193 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
194 * (16 = SIGNAL time, 6 = tail bits)
195 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
196 *
197 * T_SYM = 4 usec
198 * 802.11a - 17.5.2: aSIFSTime = 16 usec
199 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
200 * signal ext = 6 usec
201 */
202 dur = 16; /* SIFS + signal ext */
203 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
204 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
205 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
206 4 * rate); /* T_SYM x N_SYM */
207 } else {
208 /*
209 * 802.11b or 802.11g with 802.11b compatibility:
210 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
211 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
212 *
213 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
214 * aSIFSTime = 10 usec
215 * aPreambleLength = 144 usec or 72 usec with short preamble
216 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
217 */
218 dur = 10; /* aSIFSTime = 10 usec */
219 dur += short_preamble ? (72 + 24) : (144 + 48);
220
221 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
222 }
223
224 return dur;
225 }
226
227 /* Exported duration function for driver use */
228 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
229 struct ieee80211_vif *vif,
230 size_t frame_len,
231 struct ieee80211_rate *rate)
232 {
233 struct ieee80211_local *local = hw_to_local(hw);
234 struct ieee80211_sub_if_data *sdata;
235 u16 dur;
236 int erp;
237 bool short_preamble = false;
238
239 erp = 0;
240 if (vif) {
241 sdata = vif_to_sdata(vif);
242 short_preamble = sdata->vif.bss_conf.use_short_preamble;
243 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
244 erp = rate->flags & IEEE80211_RATE_ERP_G;
245 }
246
247 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
248 short_preamble);
249
250 return cpu_to_le16(dur);
251 }
252 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
253
254 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
255 struct ieee80211_vif *vif, size_t frame_len,
256 const struct ieee80211_tx_info *frame_txctl)
257 {
258 struct ieee80211_local *local = hw_to_local(hw);
259 struct ieee80211_rate *rate;
260 struct ieee80211_sub_if_data *sdata;
261 bool short_preamble;
262 int erp;
263 u16 dur;
264 struct ieee80211_supported_band *sband;
265
266 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
267
268 short_preamble = false;
269
270 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
271
272 erp = 0;
273 if (vif) {
274 sdata = vif_to_sdata(vif);
275 short_preamble = sdata->vif.bss_conf.use_short_preamble;
276 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
277 erp = rate->flags & IEEE80211_RATE_ERP_G;
278 }
279
280 /* CTS duration */
281 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
282 erp, short_preamble);
283 /* Data frame duration */
284 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
285 erp, short_preamble);
286 /* ACK duration */
287 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
288 erp, short_preamble);
289
290 return cpu_to_le16(dur);
291 }
292 EXPORT_SYMBOL(ieee80211_rts_duration);
293
294 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
295 struct ieee80211_vif *vif,
296 size_t frame_len,
297 const struct ieee80211_tx_info *frame_txctl)
298 {
299 struct ieee80211_local *local = hw_to_local(hw);
300 struct ieee80211_rate *rate;
301 struct ieee80211_sub_if_data *sdata;
302 bool short_preamble;
303 int erp;
304 u16 dur;
305 struct ieee80211_supported_band *sband;
306
307 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
308
309 short_preamble = false;
310
311 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
312 erp = 0;
313 if (vif) {
314 sdata = vif_to_sdata(vif);
315 short_preamble = sdata->vif.bss_conf.use_short_preamble;
316 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
317 erp = rate->flags & IEEE80211_RATE_ERP_G;
318 }
319
320 /* Data frame duration */
321 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
322 erp, short_preamble);
323 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
324 /* ACK duration */
325 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
326 erp, short_preamble);
327 }
328
329 return cpu_to_le16(dur);
330 }
331 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
332
333 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason)
335 {
336 struct ieee80211_local *local = hw_to_local(hw);
337
338 /* we don't need to track ampdu queues */
339 if (queue < ieee80211_num_regular_queues(hw)) {
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345 }
346
347 if (test_bit(queue, local->queues_pending)) {
348 set_bit(queue, local->queues_pending_run);
349 tasklet_schedule(&local->tx_pending_tasklet);
350 } else {
351 netif_wake_subqueue(local->mdev, queue);
352 }
353 }
354
355 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
356 enum queue_stop_reason reason)
357 {
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362 __ieee80211_wake_queue(hw, queue, reason);
363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364 }
365
366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367 {
368 ieee80211_wake_queue_by_reason(hw, queue,
369 IEEE80211_QUEUE_STOP_REASON_DRIVER);
370 }
371 EXPORT_SYMBOL(ieee80211_wake_queue);
372
373 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
374 enum queue_stop_reason reason)
375 {
376 struct ieee80211_local *local = hw_to_local(hw);
377
378 /* we don't need to track ampdu queues */
379 if (queue < ieee80211_num_regular_queues(hw))
380 __set_bit(reason, &local->queue_stop_reasons[queue]);
381
382 netif_stop_subqueue(local->mdev, queue);
383 }
384
385 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
386 enum queue_stop_reason reason)
387 {
388 struct ieee80211_local *local = hw_to_local(hw);
389 unsigned long flags;
390
391 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
392 __ieee80211_stop_queue(hw, queue, reason);
393 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
394 }
395
396 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
397 {
398 ieee80211_stop_queue_by_reason(hw, queue,
399 IEEE80211_QUEUE_STOP_REASON_DRIVER);
400 }
401 EXPORT_SYMBOL(ieee80211_stop_queue);
402
403 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
404 enum queue_stop_reason reason)
405 {
406 struct ieee80211_local *local = hw_to_local(hw);
407 unsigned long flags;
408 int i;
409
410 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
411
412 for (i = 0; i < ieee80211_num_queues(hw); i++)
413 __ieee80211_stop_queue(hw, i, reason);
414
415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
416 }
417
418 void ieee80211_stop_queues(struct ieee80211_hw *hw)
419 {
420 ieee80211_stop_queues_by_reason(hw,
421 IEEE80211_QUEUE_STOP_REASON_DRIVER);
422 }
423 EXPORT_SYMBOL(ieee80211_stop_queues);
424
425 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
426 {
427 struct ieee80211_local *local = hw_to_local(hw);
428 return __netif_subqueue_stopped(local->mdev, queue);
429 }
430 EXPORT_SYMBOL(ieee80211_queue_stopped);
431
432 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
433 enum queue_stop_reason reason)
434 {
435 struct ieee80211_local *local = hw_to_local(hw);
436 unsigned long flags;
437 int i;
438
439 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
440
441 for (i = 0; i < hw->queues + hw->ampdu_queues; i++)
442 __ieee80211_wake_queue(hw, i, reason);
443
444 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
445 }
446
447 void ieee80211_wake_queues(struct ieee80211_hw *hw)
448 {
449 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
450 }
451 EXPORT_SYMBOL(ieee80211_wake_queues);
452
453 void ieee80211_iterate_active_interfaces(
454 struct ieee80211_hw *hw,
455 void (*iterator)(void *data, u8 *mac,
456 struct ieee80211_vif *vif),
457 void *data)
458 {
459 struct ieee80211_local *local = hw_to_local(hw);
460 struct ieee80211_sub_if_data *sdata;
461
462 rtnl_lock();
463
464 list_for_each_entry(sdata, &local->interfaces, list) {
465 switch (sdata->vif.type) {
466 case __NL80211_IFTYPE_AFTER_LAST:
467 case NL80211_IFTYPE_UNSPECIFIED:
468 case NL80211_IFTYPE_MONITOR:
469 case NL80211_IFTYPE_AP_VLAN:
470 continue;
471 case NL80211_IFTYPE_AP:
472 case NL80211_IFTYPE_STATION:
473 case NL80211_IFTYPE_ADHOC:
474 case NL80211_IFTYPE_WDS:
475 case NL80211_IFTYPE_MESH_POINT:
476 break;
477 }
478 if (netif_running(sdata->dev))
479 iterator(data, sdata->dev->dev_addr,
480 &sdata->vif);
481 }
482
483 rtnl_unlock();
484 }
485 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
486
487 void ieee80211_iterate_active_interfaces_atomic(
488 struct ieee80211_hw *hw,
489 void (*iterator)(void *data, u8 *mac,
490 struct ieee80211_vif *vif),
491 void *data)
492 {
493 struct ieee80211_local *local = hw_to_local(hw);
494 struct ieee80211_sub_if_data *sdata;
495
496 rcu_read_lock();
497
498 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
499 switch (sdata->vif.type) {
500 case __NL80211_IFTYPE_AFTER_LAST:
501 case NL80211_IFTYPE_UNSPECIFIED:
502 case NL80211_IFTYPE_MONITOR:
503 case NL80211_IFTYPE_AP_VLAN:
504 continue;
505 case NL80211_IFTYPE_AP:
506 case NL80211_IFTYPE_STATION:
507 case NL80211_IFTYPE_ADHOC:
508 case NL80211_IFTYPE_WDS:
509 case NL80211_IFTYPE_MESH_POINT:
510 break;
511 }
512 if (netif_running(sdata->dev))
513 iterator(data, sdata->dev->dev_addr,
514 &sdata->vif);
515 }
516
517 rcu_read_unlock();
518 }
519 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
520
521 void ieee802_11_parse_elems(u8 *start, size_t len,
522 struct ieee802_11_elems *elems)
523 {
524 size_t left = len;
525 u8 *pos = start;
526
527 memset(elems, 0, sizeof(*elems));
528 elems->ie_start = start;
529 elems->total_len = len;
530
531 while (left >= 2) {
532 u8 id, elen;
533
534 id = *pos++;
535 elen = *pos++;
536 left -= 2;
537
538 if (elen > left)
539 return;
540
541 switch (id) {
542 case WLAN_EID_SSID:
543 elems->ssid = pos;
544 elems->ssid_len = elen;
545 break;
546 case WLAN_EID_SUPP_RATES:
547 elems->supp_rates = pos;
548 elems->supp_rates_len = elen;
549 break;
550 case WLAN_EID_FH_PARAMS:
551 elems->fh_params = pos;
552 elems->fh_params_len = elen;
553 break;
554 case WLAN_EID_DS_PARAMS:
555 elems->ds_params = pos;
556 elems->ds_params_len = elen;
557 break;
558 case WLAN_EID_CF_PARAMS:
559 elems->cf_params = pos;
560 elems->cf_params_len = elen;
561 break;
562 case WLAN_EID_TIM:
563 elems->tim = pos;
564 elems->tim_len = elen;
565 break;
566 case WLAN_EID_IBSS_PARAMS:
567 elems->ibss_params = pos;
568 elems->ibss_params_len = elen;
569 break;
570 case WLAN_EID_CHALLENGE:
571 elems->challenge = pos;
572 elems->challenge_len = elen;
573 break;
574 case WLAN_EID_WPA:
575 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
576 pos[2] == 0xf2) {
577 /* Microsoft OUI (00:50:F2) */
578 if (pos[3] == 1) {
579 /* OUI Type 1 - WPA IE */
580 elems->wpa = pos;
581 elems->wpa_len = elen;
582 } else if (elen >= 5 && pos[3] == 2) {
583 if (pos[4] == 0) {
584 elems->wmm_info = pos;
585 elems->wmm_info_len = elen;
586 } else if (pos[4] == 1) {
587 elems->wmm_param = pos;
588 elems->wmm_param_len = elen;
589 }
590 }
591 }
592 break;
593 case WLAN_EID_RSN:
594 elems->rsn = pos;
595 elems->rsn_len = elen;
596 break;
597 case WLAN_EID_ERP_INFO:
598 elems->erp_info = pos;
599 elems->erp_info_len = elen;
600 break;
601 case WLAN_EID_EXT_SUPP_RATES:
602 elems->ext_supp_rates = pos;
603 elems->ext_supp_rates_len = elen;
604 break;
605 case WLAN_EID_HT_CAPABILITY:
606 if (elen >= sizeof(struct ieee80211_ht_cap))
607 elems->ht_cap_elem = (void *)pos;
608 break;
609 case WLAN_EID_HT_INFORMATION:
610 if (elen >= sizeof(struct ieee80211_ht_info))
611 elems->ht_info_elem = (void *)pos;
612 break;
613 case WLAN_EID_MESH_ID:
614 elems->mesh_id = pos;
615 elems->mesh_id_len = elen;
616 break;
617 case WLAN_EID_MESH_CONFIG:
618 elems->mesh_config = pos;
619 elems->mesh_config_len = elen;
620 break;
621 case WLAN_EID_PEER_LINK:
622 elems->peer_link = pos;
623 elems->peer_link_len = elen;
624 break;
625 case WLAN_EID_PREQ:
626 elems->preq = pos;
627 elems->preq_len = elen;
628 break;
629 case WLAN_EID_PREP:
630 elems->prep = pos;
631 elems->prep_len = elen;
632 break;
633 case WLAN_EID_PERR:
634 elems->perr = pos;
635 elems->perr_len = elen;
636 break;
637 case WLAN_EID_CHANNEL_SWITCH:
638 elems->ch_switch_elem = pos;
639 elems->ch_switch_elem_len = elen;
640 break;
641 case WLAN_EID_QUIET:
642 if (!elems->quiet_elem) {
643 elems->quiet_elem = pos;
644 elems->quiet_elem_len = elen;
645 }
646 elems->num_of_quiet_elem++;
647 break;
648 case WLAN_EID_COUNTRY:
649 elems->country_elem = pos;
650 elems->country_elem_len = elen;
651 break;
652 case WLAN_EID_PWR_CONSTRAINT:
653 elems->pwr_constr_elem = pos;
654 elems->pwr_constr_elem_len = elen;
655 break;
656 default:
657 break;
658 }
659
660 left -= elen;
661 pos += elen;
662 }
663 }
664
665 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
666 {
667 struct ieee80211_local *local = sdata->local;
668 struct ieee80211_tx_queue_params qparam;
669 int i;
670
671 if (!local->ops->conf_tx)
672 return;
673
674 memset(&qparam, 0, sizeof(qparam));
675
676 qparam.aifs = 2;
677
678 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
679 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
680 qparam.cw_min = 31;
681 else
682 qparam.cw_min = 15;
683
684 qparam.cw_max = 1023;
685 qparam.txop = 0;
686
687 for (i = 0; i < local_to_hw(local)->queues; i++)
688 local->ops->conf_tx(local_to_hw(local), i, &qparam);
689 }
690
691 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
692 int encrypt)
693 {
694 skb->dev = sdata->local->mdev;
695 skb_set_mac_header(skb, 0);
696 skb_set_network_header(skb, 0);
697 skb_set_transport_header(skb, 0);
698
699 skb->iif = sdata->dev->ifindex;
700 skb->do_not_encrypt = !encrypt;
701
702 dev_queue_xmit(skb);
703 }
704
705 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
706 {
707 int ret = -EINVAL;
708 struct ieee80211_channel *chan;
709 struct ieee80211_local *local = sdata->local;
710
711 chan = ieee80211_get_channel(local->hw.wiphy, freqMHz);
712
713 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
714 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
715 chan->flags & IEEE80211_CHAN_NO_IBSS)
716 return ret;
717 local->oper_channel = chan;
718 local->oper_channel_type = NL80211_CHAN_NO_HT;
719
720 if (local->sw_scanning || local->hw_scanning)
721 ret = 0;
722 else
723 ret = ieee80211_hw_config(
724 local, IEEE80211_CONF_CHANGE_CHANNEL);
725 }
726
727 return ret;
728 }
729
730 u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
731 enum ieee80211_band band)
732 {
733 struct ieee80211_supported_band *sband;
734 struct ieee80211_rate *bitrates;
735 u64 mandatory_rates;
736 enum ieee80211_rate_flags mandatory_flag;
737 int i;
738
739 sband = local->hw.wiphy->bands[band];
740 if (!sband) {
741 WARN_ON(1);
742 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
743 }
744
745 if (band == IEEE80211_BAND_2GHZ)
746 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
747 else
748 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
749
750 bitrates = sband->bitrates;
751 mandatory_rates = 0;
752 for (i = 0; i < sband->n_bitrates; i++)
753 if (bitrates[i].flags & mandatory_flag)
754 mandatory_rates |= BIT(i);
755 return mandatory_rates;
756 }
A cbs scheduler for rt-kernel