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>
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.
11 * utilities for mac80211
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.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>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 /* privid for wiphys to determine whether they belong to us or not */
37 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 struct ieee80211_local *local;
44 local = wiphy_priv(wiphy);
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
49 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50 enum nl80211_iftype type)
52 __le16 fc = hdr->frame_control;
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
58 if (ieee80211_is_data(fc)) {
59 if (len < 24) /* drop incorrect hdr len (data) */
62 if (ieee80211_has_a4(fc))
64 if (ieee80211_has_tods(fc))
66 if (ieee80211_has_fromds(fc))
72 if (ieee80211_is_mgmt(fc)) {
73 if (len < 24) /* drop incorrect hdr len (mgmt) */
78 if (ieee80211_is_ctl(fc)) {
79 if(ieee80211_is_pspoll(fc))
82 if (ieee80211_is_back_req(fc)) {
84 case NL80211_IFTYPE_STATION:
86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
90 break; /* fall through to the return */
98 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
101 struct ieee80211_hdr *hdr;
103 skb_queue_walk(&tx->skbs, skb) {
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
109 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
110 int rate, int erp, int short_preamble)
114 /* calculate duration (in microseconds, rounded up to next higher
115 * integer if it includes a fractional microsecond) to send frame of
116 * len bytes (does not include FCS) at the given rate. Duration will
119 * rate is in 100 kbps, so divident is multiplied by 10 in the
120 * DIV_ROUND_UP() operations.
123 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
127 * N_DBPS = DATARATE x 4
128 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129 * (16 = SIGNAL time, 6 = tail bits)
130 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
133 * 802.11a - 17.5.2: aSIFSTime = 16 usec
134 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135 * signal ext = 6 usec
137 dur = 16; /* SIFS + signal ext */
138 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
141 4 * rate); /* T_SYM x N_SYM */
144 * 802.11b or 802.11g with 802.11b compatibility:
145 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
148 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149 * aSIFSTime = 10 usec
150 * aPreambleLength = 144 usec or 72 usec with short preamble
151 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
153 dur = 10; /* aSIFSTime = 10 usec */
154 dur += short_preamble ? (72 + 24) : (144 + 48);
156 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
162 /* Exported duration function for driver use */
163 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
164 struct ieee80211_vif *vif,
166 struct ieee80211_rate *rate)
168 struct ieee80211_local *local = hw_to_local(hw);
169 struct ieee80211_sub_if_data *sdata;
172 bool short_preamble = false;
176 sdata = vif_to_sdata(vif);
177 short_preamble = sdata->vif.bss_conf.use_short_preamble;
178 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
185 return cpu_to_le16(dur);
187 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
189 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
190 struct ieee80211_vif *vif, size_t frame_len,
191 const struct ieee80211_tx_info *frame_txctl)
193 struct ieee80211_local *local = hw_to_local(hw);
194 struct ieee80211_rate *rate;
195 struct ieee80211_sub_if_data *sdata;
199 struct ieee80211_supported_band *sband;
201 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
203 short_preamble = false;
205 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
209 sdata = vif_to_sdata(vif);
210 short_preamble = sdata->vif.bss_conf.use_short_preamble;
211 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
212 erp = rate->flags & IEEE80211_RATE_ERP_G;
216 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
217 erp, short_preamble);
218 /* Data frame duration */
219 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
220 erp, short_preamble);
222 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
223 erp, short_preamble);
225 return cpu_to_le16(dur);
227 EXPORT_SYMBOL(ieee80211_rts_duration);
229 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
230 struct ieee80211_vif *vif,
232 const struct ieee80211_tx_info *frame_txctl)
234 struct ieee80211_local *local = hw_to_local(hw);
235 struct ieee80211_rate *rate;
236 struct ieee80211_sub_if_data *sdata;
240 struct ieee80211_supported_band *sband;
242 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
244 short_preamble = false;
246 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
249 sdata = vif_to_sdata(vif);
250 short_preamble = sdata->vif.bss_conf.use_short_preamble;
251 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
252 erp = rate->flags & IEEE80211_RATE_ERP_G;
255 /* Data frame duration */
256 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
257 erp, short_preamble);
258 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
260 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
261 erp, short_preamble);
264 return cpu_to_le16(dur);
266 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
268 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
269 enum queue_stop_reason reason)
271 struct ieee80211_local *local = hw_to_local(hw);
272 struct ieee80211_sub_if_data *sdata;
274 trace_wake_queue(local, queue, reason);
276 if (WARN_ON(queue >= hw->queues))
279 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
282 __clear_bit(reason, &local->queue_stop_reasons[queue]);
284 if (local->queue_stop_reasons[queue] != 0)
285 /* someone still has this queue stopped */
288 if (skb_queue_empty(&local->pending[queue])) {
290 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
291 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
293 netif_wake_subqueue(sdata->dev, queue);
297 tasklet_schedule(&local->tx_pending_tasklet);
300 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
301 enum queue_stop_reason reason)
303 struct ieee80211_local *local = hw_to_local(hw);
306 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
307 __ieee80211_wake_queue(hw, queue, reason);
308 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
311 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
313 ieee80211_wake_queue_by_reason(hw, queue,
314 IEEE80211_QUEUE_STOP_REASON_DRIVER);
316 EXPORT_SYMBOL(ieee80211_wake_queue);
318 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
319 enum queue_stop_reason reason)
321 struct ieee80211_local *local = hw_to_local(hw);
322 struct ieee80211_sub_if_data *sdata;
324 trace_stop_queue(local, queue, reason);
326 if (WARN_ON(queue >= hw->queues))
329 if (test_bit(reason, &local->queue_stop_reasons[queue]))
332 __set_bit(reason, &local->queue_stop_reasons[queue]);
335 list_for_each_entry_rcu(sdata, &local->interfaces, list)
336 netif_stop_subqueue(sdata->dev, queue);
340 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
341 enum queue_stop_reason reason)
343 struct ieee80211_local *local = hw_to_local(hw);
346 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
347 __ieee80211_stop_queue(hw, queue, reason);
348 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
351 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
353 ieee80211_stop_queue_by_reason(hw, queue,
354 IEEE80211_QUEUE_STOP_REASON_DRIVER);
356 EXPORT_SYMBOL(ieee80211_stop_queue);
358 void ieee80211_add_pending_skb(struct ieee80211_local *local,
361 struct ieee80211_hw *hw = &local->hw;
363 int queue = skb_get_queue_mapping(skb);
364 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
366 if (WARN_ON(!info->control.vif)) {
371 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
372 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
373 __skb_queue_tail(&local->pending[queue], skb);
374 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
375 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
378 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
379 struct sk_buff_head *skbs,
380 void (*fn)(void *data), void *data)
382 struct ieee80211_hw *hw = &local->hw;
387 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
388 while ((skb = skb_dequeue(skbs))) {
389 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
391 if (WARN_ON(!info->control.vif)) {
396 queue = skb_get_queue_mapping(skb);
398 __ieee80211_stop_queue(hw, queue,
399 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
401 __skb_queue_tail(&local->pending[queue], skb);
407 for (i = 0; i < hw->queues; i++)
408 __ieee80211_wake_queue(hw, i,
409 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
410 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
413 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
414 enum queue_stop_reason reason)
416 struct ieee80211_local *local = hw_to_local(hw);
420 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
422 for (i = 0; i < hw->queues; i++)
423 __ieee80211_stop_queue(hw, i, reason);
425 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
428 void ieee80211_stop_queues(struct ieee80211_hw *hw)
430 ieee80211_stop_queues_by_reason(hw,
431 IEEE80211_QUEUE_STOP_REASON_DRIVER);
433 EXPORT_SYMBOL(ieee80211_stop_queues);
435 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
437 struct ieee80211_local *local = hw_to_local(hw);
441 if (WARN_ON(queue >= hw->queues))
444 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
445 ret = !!local->queue_stop_reasons[queue];
446 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449 EXPORT_SYMBOL(ieee80211_queue_stopped);
451 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
452 enum queue_stop_reason reason)
454 struct ieee80211_local *local = hw_to_local(hw);
458 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
460 for (i = 0; i < hw->queues; i++)
461 __ieee80211_wake_queue(hw, i, reason);
463 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
466 void ieee80211_wake_queues(struct ieee80211_hw *hw)
468 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
470 EXPORT_SYMBOL(ieee80211_wake_queues);
472 void ieee80211_iterate_active_interfaces(
473 struct ieee80211_hw *hw,
474 void (*iterator)(void *data, u8 *mac,
475 struct ieee80211_vif *vif),
478 struct ieee80211_local *local = hw_to_local(hw);
479 struct ieee80211_sub_if_data *sdata;
481 mutex_lock(&local->iflist_mtx);
483 list_for_each_entry(sdata, &local->interfaces, list) {
484 switch (sdata->vif.type) {
485 case NL80211_IFTYPE_MONITOR:
486 case NL80211_IFTYPE_AP_VLAN:
491 if (ieee80211_sdata_running(sdata))
492 iterator(data, sdata->vif.addr,
496 mutex_unlock(&local->iflist_mtx);
498 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
500 void ieee80211_iterate_active_interfaces_atomic(
501 struct ieee80211_hw *hw,
502 void (*iterator)(void *data, u8 *mac,
503 struct ieee80211_vif *vif),
506 struct ieee80211_local *local = hw_to_local(hw);
507 struct ieee80211_sub_if_data *sdata;
511 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
512 switch (sdata->vif.type) {
513 case NL80211_IFTYPE_MONITOR:
514 case NL80211_IFTYPE_AP_VLAN:
519 if (ieee80211_sdata_running(sdata))
520 iterator(data, sdata->vif.addr,
526 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
529 * Nothing should have been stuffed into the workqueue during
530 * the suspend->resume cycle. If this WARN is seen then there
531 * is a bug with either the driver suspend or something in
532 * mac80211 stuffing into the workqueue which we haven't yet
533 * cleared during mac80211's suspend cycle.
535 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
537 if (WARN(local->suspended && !local->resuming,
538 "queueing ieee80211 work while going to suspend\n"))
544 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
546 struct ieee80211_local *local = hw_to_local(hw);
548 if (!ieee80211_can_queue_work(local))
551 queue_work(local->workqueue, work);
553 EXPORT_SYMBOL(ieee80211_queue_work);
555 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
556 struct delayed_work *dwork,
559 struct ieee80211_local *local = hw_to_local(hw);
561 if (!ieee80211_can_queue_work(local))
564 queue_delayed_work(local->workqueue, dwork, delay);
566 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
568 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
569 struct ieee802_11_elems *elems,
574 bool calc_crc = filter != 0;
575 DECLARE_BITMAP(seen_elems, 256);
577 bitmap_zero(seen_elems, 256);
578 memset(elems, 0, sizeof(*elems));
579 elems->ie_start = start;
580 elems->total_len = len;
584 bool elem_parse_failed;
591 elems->parse_error = true;
595 if (id != WLAN_EID_VENDOR_SPECIFIC &&
596 id != WLAN_EID_QUIET &&
597 test_bit(id, seen_elems)) {
598 elems->parse_error = true;
604 if (calc_crc && id < 64 && (filter & (1ULL << id)))
605 crc = crc32_be(crc, pos - 2, elen + 2);
607 elem_parse_failed = false;
612 elems->ssid_len = elen;
614 case WLAN_EID_SUPP_RATES:
615 elems->supp_rates = pos;
616 elems->supp_rates_len = elen;
618 case WLAN_EID_FH_PARAMS:
619 elems->fh_params = pos;
620 elems->fh_params_len = elen;
622 case WLAN_EID_DS_PARAMS:
623 elems->ds_params = pos;
624 elems->ds_params_len = elen;
626 case WLAN_EID_CF_PARAMS:
627 elems->cf_params = pos;
628 elems->cf_params_len = elen;
631 if (elen >= sizeof(struct ieee80211_tim_ie)) {
632 elems->tim = (void *)pos;
633 elems->tim_len = elen;
635 elem_parse_failed = true;
637 case WLAN_EID_IBSS_PARAMS:
638 elems->ibss_params = pos;
639 elems->ibss_params_len = elen;
641 case WLAN_EID_CHALLENGE:
642 elems->challenge = pos;
643 elems->challenge_len = elen;
645 case WLAN_EID_VENDOR_SPECIFIC:
646 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
648 /* Microsoft OUI (00:50:F2) */
651 crc = crc32_be(crc, pos - 2, elen + 2);
654 /* OUI Type 1 - WPA IE */
656 elems->wpa_len = elen;
657 } else if (elen >= 5 && pos[3] == 2) {
658 /* OUI Type 2 - WMM IE */
660 elems->wmm_info = pos;
661 elems->wmm_info_len = elen;
662 } else if (pos[4] == 1) {
663 elems->wmm_param = pos;
664 elems->wmm_param_len = elen;
671 elems->rsn_len = elen;
673 case WLAN_EID_ERP_INFO:
674 elems->erp_info = pos;
675 elems->erp_info_len = elen;
677 case WLAN_EID_EXT_SUPP_RATES:
678 elems->ext_supp_rates = pos;
679 elems->ext_supp_rates_len = elen;
681 case WLAN_EID_HT_CAPABILITY:
682 if (elen >= sizeof(struct ieee80211_ht_cap))
683 elems->ht_cap_elem = (void *)pos;
685 elem_parse_failed = true;
687 case WLAN_EID_HT_OPERATION:
688 if (elen >= sizeof(struct ieee80211_ht_operation))
689 elems->ht_operation = (void *)pos;
691 elem_parse_failed = true;
693 case WLAN_EID_MESH_ID:
694 elems->mesh_id = pos;
695 elems->mesh_id_len = elen;
697 case WLAN_EID_MESH_CONFIG:
698 if (elen >= sizeof(struct ieee80211_meshconf_ie))
699 elems->mesh_config = (void *)pos;
701 elem_parse_failed = true;
703 case WLAN_EID_PEER_MGMT:
704 elems->peering = pos;
705 elems->peering_len = elen;
709 elems->preq_len = elen;
713 elems->prep_len = elen;
717 elems->perr_len = elen;
720 if (elen >= sizeof(struct ieee80211_rann_ie))
721 elems->rann = (void *)pos;
723 elem_parse_failed = true;
725 case WLAN_EID_CHANNEL_SWITCH:
726 elems->ch_switch_elem = pos;
727 elems->ch_switch_elem_len = elen;
730 if (!elems->quiet_elem) {
731 elems->quiet_elem = pos;
732 elems->quiet_elem_len = elen;
734 elems->num_of_quiet_elem++;
736 case WLAN_EID_COUNTRY:
737 elems->country_elem = pos;
738 elems->country_elem_len = elen;
740 case WLAN_EID_PWR_CONSTRAINT:
741 elems->pwr_constr_elem = pos;
742 elems->pwr_constr_elem_len = elen;
744 case WLAN_EID_TIMEOUT_INTERVAL:
745 elems->timeout_int = pos;
746 elems->timeout_int_len = elen;
752 if (elem_parse_failed)
753 elems->parse_error = true;
755 set_bit(id, seen_elems);
762 elems->parse_error = true;
767 void ieee802_11_parse_elems(u8 *start, size_t len,
768 struct ieee802_11_elems *elems)
770 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
773 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
776 struct ieee80211_local *local = sdata->local;
777 struct ieee80211_tx_queue_params qparam;
782 if (!local->ops->conf_tx)
785 if (local->hw.queues < IEEE80211_NUM_ACS)
788 memset(&qparam, 0, sizeof(qparam));
790 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
791 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
793 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
794 /* Set defaults according to 802.11-2007 Table 7-37 */
802 case IEEE80211_AC_BK:
803 qparam.cw_max = aCWmax;
804 qparam.cw_min = aCWmin;
808 default: /* never happens but let's not leave undefined */
809 case IEEE80211_AC_BE:
810 qparam.cw_max = aCWmax;
811 qparam.cw_min = aCWmin;
815 case IEEE80211_AC_VI:
816 qparam.cw_max = aCWmin;
817 qparam.cw_min = (aCWmin + 1) / 2 - 1;
819 qparam.txop = 6016/32;
821 qparam.txop = 3008/32;
824 case IEEE80211_AC_VO:
825 qparam.cw_max = (aCWmin + 1) / 2 - 1;
826 qparam.cw_min = (aCWmin + 1) / 4 - 1;
828 qparam.txop = 3264/32;
830 qparam.txop = 1504/32;
835 qparam.uapsd = false;
837 sdata->tx_conf[ac] = qparam;
838 drv_conf_tx(local, sdata, ac, &qparam);
841 /* after reinitialize QoS TX queues setting to default,
842 * disable QoS at all */
844 if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
845 sdata->vif.bss_conf.qos =
846 sdata->vif.type != NL80211_IFTYPE_STATION;
848 ieee80211_bss_info_change_notify(sdata,
853 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
854 const size_t supp_rates_len,
855 const u8 *supp_rates)
857 struct ieee80211_local *local = sdata->local;
858 int i, have_higher_than_11mbit = 0;
860 /* cf. IEEE 802.11 9.2.12 */
861 for (i = 0; i < supp_rates_len; i++)
862 if ((supp_rates[i] & 0x7f) * 5 > 110)
863 have_higher_than_11mbit = 1;
865 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
866 have_higher_than_11mbit)
867 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
869 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
871 ieee80211_set_wmm_default(sdata, true);
874 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
875 enum ieee80211_band band)
877 struct ieee80211_supported_band *sband;
878 struct ieee80211_rate *bitrates;
880 enum ieee80211_rate_flags mandatory_flag;
883 sband = local->hw.wiphy->bands[band];
886 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
889 if (band == IEEE80211_BAND_2GHZ)
890 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
892 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
894 bitrates = sband->bitrates;
896 for (i = 0; i < sband->n_bitrates; i++)
897 if (bitrates[i].flags & mandatory_flag)
898 mandatory_rates |= BIT(i);
899 return mandatory_rates;
902 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
903 u16 transaction, u16 auth_alg,
904 u8 *extra, size_t extra_len, const u8 *da,
905 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
907 struct ieee80211_local *local = sdata->local;
909 struct ieee80211_mgmt *mgmt;
912 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
913 sizeof(*mgmt) + 6 + extra_len);
917 skb_reserve(skb, local->hw.extra_tx_headroom);
919 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
920 memset(mgmt, 0, 24 + 6);
921 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
922 IEEE80211_STYPE_AUTH);
923 memcpy(mgmt->da, da, ETH_ALEN);
924 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
925 memcpy(mgmt->bssid, bssid, ETH_ALEN);
926 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
927 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
928 mgmt->u.auth.status_code = cpu_to_le16(0);
930 memcpy(skb_put(skb, extra_len), extra, extra_len);
932 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
933 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
934 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
938 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
939 ieee80211_tx_skb(sdata, skb);
942 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
943 const u8 *ie, size_t ie_len,
944 enum ieee80211_band band, u32 rate_mask,
947 struct ieee80211_supported_band *sband;
949 size_t offset = 0, noffset;
950 int supp_rates_len, i;
955 sband = local->hw.wiphy->bands[band];
960 for (i = 0; i < sband->n_bitrates; i++) {
961 if ((BIT(i) & rate_mask) == 0)
962 continue; /* skip rate */
963 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
966 supp_rates_len = min_t(int, num_rates, 8);
968 *pos++ = WLAN_EID_SUPP_RATES;
969 *pos++ = supp_rates_len;
970 memcpy(pos, rates, supp_rates_len);
971 pos += supp_rates_len;
973 /* insert "request information" if in custom IEs */
975 static const u8 before_extrates[] = {
980 noffset = ieee80211_ie_split(ie, ie_len,
982 ARRAY_SIZE(before_extrates),
984 memcpy(pos, ie + offset, noffset - offset);
985 pos += noffset - offset;
989 ext_rates_len = num_rates - supp_rates_len;
990 if (ext_rates_len > 0) {
991 *pos++ = WLAN_EID_EXT_SUPP_RATES;
992 *pos++ = ext_rates_len;
993 memcpy(pos, rates + supp_rates_len, ext_rates_len);
994 pos += ext_rates_len;
997 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
998 *pos++ = WLAN_EID_DS_PARAMS;
1003 /* insert custom IEs that go before HT */
1005 static const u8 before_ht[] = {
1007 WLAN_EID_SUPP_RATES,
1009 WLAN_EID_EXT_SUPP_RATES,
1011 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1013 noffset = ieee80211_ie_split(ie, ie_len,
1014 before_ht, ARRAY_SIZE(before_ht),
1016 memcpy(pos, ie + offset, noffset - offset);
1017 pos += noffset - offset;
1021 if (sband->ht_cap.ht_supported)
1022 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1026 * If adding more here, adjust code in main.c
1027 * that calculates local->scan_ies_len.
1030 /* add any remaining custom IEs */
1033 memcpy(pos, ie + offset, noffset - offset);
1034 pos += noffset - offset;
1037 return pos - buffer;
1040 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1041 u8 *dst, u32 ratemask,
1042 const u8 *ssid, size_t ssid_len,
1043 const u8 *ie, size_t ie_len,
1046 struct ieee80211_local *local = sdata->local;
1047 struct sk_buff *skb;
1048 struct ieee80211_mgmt *mgmt;
1053 /* FIXME: come up with a proper value */
1054 buf = kmalloc(200 + ie_len, GFP_KERNEL);
1059 * Do not send DS Channel parameter for directed probe requests
1060 * in order to maximize the chance that we get a response. Some
1061 * badly-behaved APs don't respond when this parameter is included.
1066 chan = ieee80211_frequency_to_channel(
1067 local->hw.conf.channel->center_freq);
1069 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
1070 local->hw.conf.channel->band,
1073 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1080 mgmt = (struct ieee80211_mgmt *) skb->data;
1081 memcpy(mgmt->da, dst, ETH_ALEN);
1082 memcpy(mgmt->bssid, dst, ETH_ALEN);
1085 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1093 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1094 const u8 *ssid, size_t ssid_len,
1095 const u8 *ie, size_t ie_len,
1096 u32 ratemask, bool directed, bool no_cck)
1098 struct sk_buff *skb;
1100 skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len,
1101 ie, ie_len, directed);
1104 IEEE80211_SKB_CB(skb)->flags |=
1105 IEEE80211_TX_CTL_NO_CCK_RATE;
1106 ieee80211_tx_skb(sdata, skb);
1110 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1111 struct ieee802_11_elems *elems,
1112 enum ieee80211_band band, u32 *basic_rates)
1114 struct ieee80211_supported_band *sband;
1115 struct ieee80211_rate *bitrates;
1119 sband = local->hw.wiphy->bands[band];
1123 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1126 bitrates = sband->bitrates;
1127 num_rates = sband->n_bitrates;
1129 for (i = 0; i < elems->supp_rates_len +
1130 elems->ext_supp_rates_len; i++) {
1134 if (i < elems->supp_rates_len)
1135 rate = elems->supp_rates[i];
1136 else if (elems->ext_supp_rates)
1137 rate = elems->ext_supp_rates
1138 [i - elems->supp_rates_len];
1139 own_rate = 5 * (rate & 0x7f);
1140 is_basic = !!(rate & 0x80);
1142 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1145 for (j = 0; j < num_rates; j++) {
1146 if (bitrates[j].bitrate == own_rate) {
1147 supp_rates |= BIT(j);
1148 if (basic_rates && is_basic)
1149 *basic_rates |= BIT(j);
1156 void ieee80211_stop_device(struct ieee80211_local *local)
1158 ieee80211_led_radio(local, false);
1159 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1161 cancel_work_sync(&local->reconfig_filter);
1163 flush_workqueue(local->workqueue);
1167 int ieee80211_reconfig(struct ieee80211_local *local)
1169 struct ieee80211_hw *hw = &local->hw;
1170 struct ieee80211_sub_if_data *sdata;
1171 struct sta_info *sta;
1175 if (local->suspended)
1176 local->resuming = true;
1178 if (local->wowlan) {
1179 local->wowlan = false;
1180 res = drv_resume(local);
1182 local->resuming = false;
1189 * res is 1, which means the driver requested
1190 * to go through a regular reset on wakeup.
1194 /* everything else happens only if HW was up & running */
1195 if (!local->open_count)
1199 * Upon resume hardware can sometimes be goofy due to
1200 * various platform / driver / bus issues, so restarting
1201 * the device may at times not work immediately. Propagate
1204 res = drv_start(local);
1206 WARN(local->suspended, "Hardware became unavailable "
1207 "upon resume. This could be a software issue "
1208 "prior to suspend or a hardware issue.\n");
1212 /* setup fragmentation threshold */
1213 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1215 /* setup RTS threshold */
1216 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1218 /* reset coverage class */
1219 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1221 ieee80211_led_radio(local, true);
1222 ieee80211_mod_tpt_led_trig(local,
1223 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1225 /* add interfaces */
1226 sdata = rtnl_dereference(local->monitor_sdata);
1228 res = drv_add_interface(local, sdata);
1230 rcu_assign_pointer(local->monitor_sdata, NULL);
1236 list_for_each_entry(sdata, &local->interfaces, list) {
1237 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1238 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1239 ieee80211_sdata_running(sdata))
1240 res = drv_add_interface(local, sdata);
1244 mutex_lock(&local->sta_mtx);
1245 list_for_each_entry(sta, &local->sta_list, list) {
1246 if (sta->uploaded) {
1247 enum ieee80211_sta_state state;
1249 for (state = IEEE80211_STA_NOTEXIST;
1250 state < sta->sta_state - 1; state++)
1251 WARN_ON(drv_sta_state(local, sta->sdata, sta,
1255 mutex_unlock(&local->sta_mtx);
1257 /* reconfigure tx conf */
1258 if (hw->queues >= IEEE80211_NUM_ACS) {
1259 list_for_each_entry(sdata, &local->interfaces, list) {
1260 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1261 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1262 !ieee80211_sdata_running(sdata))
1265 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1266 drv_conf_tx(local, sdata, i,
1267 &sdata->tx_conf[i]);
1271 /* reconfigure hardware */
1272 ieee80211_hw_config(local, ~0);
1274 ieee80211_configure_filter(local);
1276 /* Finally also reconfigure all the BSS information */
1277 list_for_each_entry(sdata, &local->interfaces, list) {
1280 if (!ieee80211_sdata_running(sdata))
1283 /* common change flags for all interface types */
1284 changed = BSS_CHANGED_ERP_CTS_PROT |
1285 BSS_CHANGED_ERP_PREAMBLE |
1286 BSS_CHANGED_ERP_SLOT |
1288 BSS_CHANGED_BASIC_RATES |
1289 BSS_CHANGED_BEACON_INT |
1295 switch (sdata->vif.type) {
1296 case NL80211_IFTYPE_STATION:
1297 changed |= BSS_CHANGED_ASSOC |
1298 BSS_CHANGED_ARP_FILTER;
1299 mutex_lock(&sdata->u.mgd.mtx);
1300 ieee80211_bss_info_change_notify(sdata, changed);
1301 mutex_unlock(&sdata->u.mgd.mtx);
1303 case NL80211_IFTYPE_ADHOC:
1304 changed |= BSS_CHANGED_IBSS;
1306 case NL80211_IFTYPE_AP:
1307 changed |= BSS_CHANGED_SSID;
1309 if (sdata->vif.type == NL80211_IFTYPE_AP)
1310 changed |= BSS_CHANGED_AP_PROBE_RESP;
1313 case NL80211_IFTYPE_MESH_POINT:
1314 changed |= BSS_CHANGED_BEACON |
1315 BSS_CHANGED_BEACON_ENABLED;
1316 ieee80211_bss_info_change_notify(sdata, changed);
1318 case NL80211_IFTYPE_WDS:
1320 case NL80211_IFTYPE_AP_VLAN:
1321 case NL80211_IFTYPE_MONITOR:
1322 /* ignore virtual */
1324 case NL80211_IFTYPE_UNSPECIFIED:
1325 case NUM_NL80211_IFTYPES:
1326 case NL80211_IFTYPE_P2P_CLIENT:
1327 case NL80211_IFTYPE_P2P_GO:
1333 ieee80211_recalc_ps(local, -1);
1336 * The sta might be in psm against the ap (e.g. because
1337 * this was the state before a hw restart), so we
1338 * explicitly send a null packet in order to make sure
1339 * it'll sync against the ap (and get out of psm).
1341 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1342 list_for_each_entry(sdata, &local->interfaces, list) {
1343 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1346 ieee80211_send_nullfunc(local, sdata, 0);
1351 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1352 * sessions can be established after a resume.
1354 * Also tear down aggregation sessions since reconfiguring
1355 * them in a hardware restart scenario is not easily done
1356 * right now, and the hardware will have lost information
1357 * about the sessions, but we and the AP still think they
1358 * are active. This is really a workaround though.
1360 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1361 mutex_lock(&local->sta_mtx);
1363 list_for_each_entry(sta, &local->sta_list, list) {
1364 ieee80211_sta_tear_down_BA_sessions(sta, true);
1365 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1368 mutex_unlock(&local->sta_mtx);
1372 list_for_each_entry(sdata, &local->interfaces, list)
1373 if (ieee80211_sdata_running(sdata))
1374 ieee80211_enable_keys(sdata);
1377 ieee80211_wake_queues_by_reason(hw,
1378 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1381 * If this is for hw restart things are still running.
1382 * We may want to change that later, however.
1384 if (!local->suspended)
1388 /* first set suspended false, then resuming */
1389 local->suspended = false;
1391 local->resuming = false;
1393 list_for_each_entry(sdata, &local->interfaces, list) {
1394 switch(sdata->vif.type) {
1395 case NL80211_IFTYPE_STATION:
1396 ieee80211_sta_restart(sdata);
1398 case NL80211_IFTYPE_ADHOC:
1399 ieee80211_ibss_restart(sdata);
1401 case NL80211_IFTYPE_MESH_POINT:
1402 ieee80211_mesh_restart(sdata);
1409 mod_timer(&local->sta_cleanup, jiffies + 1);
1411 mutex_lock(&local->sta_mtx);
1412 list_for_each_entry(sta, &local->sta_list, list)
1413 mesh_plink_restart(sta);
1414 mutex_unlock(&local->sta_mtx);
1421 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1423 struct ieee80211_sub_if_data *sdata;
1424 struct ieee80211_local *local;
1425 struct ieee80211_key *key;
1430 sdata = vif_to_sdata(vif);
1431 local = sdata->local;
1433 if (WARN_ON(!local->resuming))
1436 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1439 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1441 mutex_lock(&local->key_mtx);
1442 list_for_each_entry(key, &sdata->key_list, list)
1443 key->flags |= KEY_FLAG_TAINTED;
1444 mutex_unlock(&local->key_mtx);
1446 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1448 static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1449 enum ieee80211_smps_mode *smps_mode)
1451 if (ifmgd->associated) {
1452 *smps_mode = ifmgd->ap_smps;
1454 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1455 if (ifmgd->powersave)
1456 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1458 *smps_mode = IEEE80211_SMPS_OFF;
1467 /* must hold iflist_mtx */
1468 void ieee80211_recalc_smps(struct ieee80211_local *local)
1470 struct ieee80211_sub_if_data *sdata;
1471 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1474 lockdep_assert_held(&local->iflist_mtx);
1477 * This function could be improved to handle multiple
1478 * interfaces better, but right now it makes any
1479 * non-station interfaces force SM PS to be turned
1480 * off. If there are multiple station interfaces it
1481 * could also use the best possible mode, e.g. if
1482 * one is in static and the other in dynamic then
1486 list_for_each_entry(sdata, &local->interfaces, list) {
1487 if (!ieee80211_sdata_running(sdata))
1489 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1492 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
1495 smps_mode = IEEE80211_SMPS_OFF;
1500 if (smps_mode == local->smps_mode)
1504 local->smps_mode = smps_mode;
1505 /* changed flag is auto-detected for this */
1506 ieee80211_hw_config(local, 0);
1509 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1513 for (i = 0; i < n_ids; i++)
1520 * ieee80211_ie_split - split an IE buffer according to ordering
1522 * @ies: the IE buffer
1523 * @ielen: the length of the IE buffer
1524 * @ids: an array with element IDs that are allowed before
1526 * @n_ids: the size of the element ID array
1527 * @offset: offset where to start splitting in the buffer
1529 * This function splits an IE buffer by updating the @offset
1530 * variable to point to the location where the buffer should be
1533 * It assumes that the given IE buffer is well-formed, this
1534 * has to be guaranteed by the caller!
1536 * It also assumes that the IEs in the buffer are ordered
1537 * correctly, if not the result of using this function will not
1538 * be ordered correctly either, i.e. it does no reordering.
1540 * The function returns the offset where the next part of the
1541 * buffer starts, which may be @ielen if the entire (remainder)
1542 * of the buffer should be used.
1544 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1545 const u8 *ids, int n_ids, size_t offset)
1547 size_t pos = offset;
1549 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1550 pos += 2 + ies[pos + 1];
1555 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1557 size_t pos = offset;
1559 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1560 pos += 2 + ies[pos + 1];
1565 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1569 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1571 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1575 * Scale up threshold values before storing it, as the RSSI averaging
1576 * algorithm uses a scaled up value as well. Change this scaling
1577 * factor if the RSSI averaging algorithm changes.
1579 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1580 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1583 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1587 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1589 WARN_ON(rssi_min_thold == rssi_max_thold ||
1590 rssi_min_thold > rssi_max_thold);
1592 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1595 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1597 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1599 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1601 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1603 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1605 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1610 *pos++ = WLAN_EID_HT_CAPABILITY;
1611 *pos++ = sizeof(struct ieee80211_ht_cap);
1612 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1614 /* capability flags */
1615 tmp = cpu_to_le16(cap);
1616 memcpy(pos, &tmp, sizeof(u16));
1619 /* AMPDU parameters */
1620 *pos++ = ht_cap->ampdu_factor |
1621 (ht_cap->ampdu_density <<
1622 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1625 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1626 pos += sizeof(ht_cap->mcs);
1628 /* extended capabilities */
1629 pos += sizeof(__le16);
1631 /* BF capabilities */
1632 pos += sizeof(__le32);
1634 /* antenna selection */
1640 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1641 struct ieee80211_channel *channel,
1642 enum nl80211_channel_type channel_type)
1644 struct ieee80211_ht_operation *ht_oper;
1645 /* Build HT Information */
1646 *pos++ = WLAN_EID_HT_OPERATION;
1647 *pos++ = sizeof(struct ieee80211_ht_operation);
1648 ht_oper = (struct ieee80211_ht_operation *)pos;
1649 ht_oper->primary_chan =
1650 ieee80211_frequency_to_channel(channel->center_freq);
1651 switch (channel_type) {
1652 case NL80211_CHAN_HT40MINUS:
1653 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1655 case NL80211_CHAN_HT40PLUS:
1656 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1658 case NL80211_CHAN_HT20:
1660 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1663 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
1664 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1667 * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and
1668 * RIFS Mode are reserved in IBSS mode, therefore keep them at 0
1670 ht_oper->operation_mode = 0x0000;
1671 ht_oper->stbc_param = 0x0000;
1673 /* It seems that Basic MCS set and Supported MCS set
1674 are identical for the first 10 bytes */
1675 memset(&ht_oper->basic_set, 0, 16);
1676 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1678 return pos + sizeof(struct ieee80211_ht_operation);
1681 enum nl80211_channel_type
1682 ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper)
1684 enum nl80211_channel_type channel_type;
1687 return NL80211_CHAN_NO_HT;
1689 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1690 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1691 channel_type = NL80211_CHAN_HT20;
1693 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1694 channel_type = NL80211_CHAN_HT40PLUS;
1696 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1697 channel_type = NL80211_CHAN_HT40MINUS;
1700 channel_type = NL80211_CHAN_NO_HT;
1703 return channel_type;
1706 int ieee80211_add_srates_ie(struct ieee80211_vif *vif,
1707 struct sk_buff *skb, bool need_basic)
1709 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1710 struct ieee80211_local *local = sdata->local;
1711 struct ieee80211_supported_band *sband;
1714 u32 basic_rates = vif->bss_conf.basic_rates;
1716 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1717 rates = sband->n_bitrates;
1721 if (skb_tailroom(skb) < rates + 2)
1724 pos = skb_put(skb, rates + 2);
1725 *pos++ = WLAN_EID_SUPP_RATES;
1727 for (i = 0; i < rates; i++) {
1729 if (need_basic && basic_rates & BIT(i))
1731 rate = sband->bitrates[i].bitrate;
1732 *pos++ = basic | (u8) (rate / 5);
1738 int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif,
1739 struct sk_buff *skb, bool need_basic)
1741 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1742 struct ieee80211_local *local = sdata->local;
1743 struct ieee80211_supported_band *sband;
1745 u8 i, exrates, *pos;
1746 u32 basic_rates = vif->bss_conf.basic_rates;
1748 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1749 exrates = sband->n_bitrates;
1755 if (skb_tailroom(skb) < exrates + 2)
1759 pos = skb_put(skb, exrates + 2);
1760 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1762 for (i = 8; i < sband->n_bitrates; i++) {
1764 if (need_basic && basic_rates & BIT(i))
1766 rate = sband->bitrates[i].bitrate;
1767 *pos++ = basic | (u8) (rate / 5);