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/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>
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)
100 struct sk_buff *skb = tx->skb;
101 struct ieee80211_hdr *hdr;
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
106 } while ((skb = skb->next));
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);
273 if (WARN_ON(queue >= hw->queues))
276 __clear_bit(reason, &local->queue_stop_reasons[queue]);
278 if (local->queue_stop_reasons[queue] != 0)
279 /* someone still has this queue stopped */
282 if (!skb_queue_empty(&local->pending[queue]))
283 tasklet_schedule(&local->tx_pending_tasklet);
286 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
287 enum queue_stop_reason reason)
289 struct ieee80211_local *local = hw_to_local(hw);
292 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
293 __ieee80211_wake_queue(hw, queue, reason);
294 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
297 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
299 ieee80211_wake_queue_by_reason(hw, queue,
300 IEEE80211_QUEUE_STOP_REASON_DRIVER);
302 EXPORT_SYMBOL(ieee80211_wake_queue);
304 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
305 enum queue_stop_reason reason)
307 struct ieee80211_local *local = hw_to_local(hw);
309 if (WARN_ON(queue >= hw->queues))
312 __set_bit(reason, &local->queue_stop_reasons[queue]);
315 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
316 enum queue_stop_reason reason)
318 struct ieee80211_local *local = hw_to_local(hw);
321 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
322 __ieee80211_stop_queue(hw, queue, reason);
323 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
326 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
328 ieee80211_stop_queue_by_reason(hw, queue,
329 IEEE80211_QUEUE_STOP_REASON_DRIVER);
331 EXPORT_SYMBOL(ieee80211_stop_queue);
333 void ieee80211_add_pending_skb(struct ieee80211_local *local,
336 struct ieee80211_hw *hw = &local->hw;
338 int queue = skb_get_queue_mapping(skb);
339 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
341 if (WARN_ON(!info->control.vif)) {
346 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
347 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
348 __skb_queue_tail(&local->pending[queue], skb);
349 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
350 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
353 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
354 struct sk_buff_head *skbs)
356 struct ieee80211_hw *hw = &local->hw;
359 int queue, ret = 0, i;
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362 for (i = 0; i < hw->queues; i++)
363 __ieee80211_stop_queue(hw, i,
364 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
366 while ((skb = skb_dequeue(skbs))) {
367 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
369 if (WARN_ON(!info->control.vif)) {
375 queue = skb_get_queue_mapping(skb);
376 __skb_queue_tail(&local->pending[queue], skb);
379 for (i = 0; i < hw->queues; i++)
380 __ieee80211_wake_queue(hw, i,
381 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
382 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
387 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
388 enum queue_stop_reason reason)
390 struct ieee80211_local *local = hw_to_local(hw);
394 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
396 for (i = 0; i < hw->queues; i++)
397 __ieee80211_stop_queue(hw, i, reason);
399 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
402 void ieee80211_stop_queues(struct ieee80211_hw *hw)
404 ieee80211_stop_queues_by_reason(hw,
405 IEEE80211_QUEUE_STOP_REASON_DRIVER);
407 EXPORT_SYMBOL(ieee80211_stop_queues);
409 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
411 struct ieee80211_local *local = hw_to_local(hw);
415 if (WARN_ON(queue >= hw->queues))
418 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
419 ret = !!local->queue_stop_reasons[queue];
420 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
423 EXPORT_SYMBOL(ieee80211_queue_stopped);
425 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
426 enum queue_stop_reason reason)
428 struct ieee80211_local *local = hw_to_local(hw);
432 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
434 for (i = 0; i < hw->queues; i++)
435 __ieee80211_wake_queue(hw, i, reason);
437 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
440 void ieee80211_wake_queues(struct ieee80211_hw *hw)
442 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
444 EXPORT_SYMBOL(ieee80211_wake_queues);
446 void ieee80211_iterate_active_interfaces(
447 struct ieee80211_hw *hw,
448 void (*iterator)(void *data, u8 *mac,
449 struct ieee80211_vif *vif),
452 struct ieee80211_local *local = hw_to_local(hw);
453 struct ieee80211_sub_if_data *sdata;
455 mutex_lock(&local->iflist_mtx);
457 list_for_each_entry(sdata, &local->interfaces, list) {
458 switch (sdata->vif.type) {
459 case __NL80211_IFTYPE_AFTER_LAST:
460 case NL80211_IFTYPE_UNSPECIFIED:
461 case NL80211_IFTYPE_MONITOR:
462 case NL80211_IFTYPE_AP_VLAN:
464 case NL80211_IFTYPE_AP:
465 case NL80211_IFTYPE_STATION:
466 case NL80211_IFTYPE_ADHOC:
467 case NL80211_IFTYPE_WDS:
468 case NL80211_IFTYPE_MESH_POINT:
471 if (netif_running(sdata->dev))
472 iterator(data, sdata->dev->dev_addr,
476 mutex_unlock(&local->iflist_mtx);
478 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
480 void ieee80211_iterate_active_interfaces_atomic(
481 struct ieee80211_hw *hw,
482 void (*iterator)(void *data, u8 *mac,
483 struct ieee80211_vif *vif),
486 struct ieee80211_local *local = hw_to_local(hw);
487 struct ieee80211_sub_if_data *sdata;
491 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
492 switch (sdata->vif.type) {
493 case __NL80211_IFTYPE_AFTER_LAST:
494 case NL80211_IFTYPE_UNSPECIFIED:
495 case NL80211_IFTYPE_MONITOR:
496 case NL80211_IFTYPE_AP_VLAN:
498 case NL80211_IFTYPE_AP:
499 case NL80211_IFTYPE_STATION:
500 case NL80211_IFTYPE_ADHOC:
501 case NL80211_IFTYPE_WDS:
502 case NL80211_IFTYPE_MESH_POINT:
505 if (netif_running(sdata->dev))
506 iterator(data, sdata->dev->dev_addr,
512 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
515 * Nothing should have been stuffed into the workqueue during
516 * the suspend->resume cycle. If this WARN is seen then there
517 * is a bug with either the driver suspend or something in
518 * mac80211 stuffing into the workqueue which we haven't yet
519 * cleared during mac80211's suspend cycle.
521 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
523 if (WARN(local->suspended, "queueing ieee80211 work while "
524 "going to suspend\n"))
530 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
532 struct ieee80211_local *local = hw_to_local(hw);
534 if (!ieee80211_can_queue_work(local))
537 queue_work(local->workqueue, work);
539 EXPORT_SYMBOL(ieee80211_queue_work);
541 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
542 struct delayed_work *dwork,
545 struct ieee80211_local *local = hw_to_local(hw);
547 if (!ieee80211_can_queue_work(local))
550 queue_delayed_work(local->workqueue, dwork, delay);
552 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
554 void ieee802_11_parse_elems(u8 *start, size_t len,
555 struct ieee802_11_elems *elems)
557 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
560 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
561 struct ieee802_11_elems *elems,
566 bool calc_crc = filter != 0;
568 memset(elems, 0, sizeof(*elems));
569 elems->ie_start = start;
570 elems->total_len = len;
582 if (calc_crc && id < 64 && (filter & BIT(id)))
583 crc = crc32_be(crc, pos - 2, elen + 2);
588 elems->ssid_len = elen;
590 case WLAN_EID_SUPP_RATES:
591 elems->supp_rates = pos;
592 elems->supp_rates_len = elen;
594 case WLAN_EID_FH_PARAMS:
595 elems->fh_params = pos;
596 elems->fh_params_len = elen;
598 case WLAN_EID_DS_PARAMS:
599 elems->ds_params = pos;
600 elems->ds_params_len = elen;
602 case WLAN_EID_CF_PARAMS:
603 elems->cf_params = pos;
604 elems->cf_params_len = elen;
607 if (elen >= sizeof(struct ieee80211_tim_ie)) {
608 elems->tim = (void *)pos;
609 elems->tim_len = elen;
612 case WLAN_EID_IBSS_PARAMS:
613 elems->ibss_params = pos;
614 elems->ibss_params_len = elen;
616 case WLAN_EID_CHALLENGE:
617 elems->challenge = pos;
618 elems->challenge_len = elen;
620 case WLAN_EID_VENDOR_SPECIFIC:
621 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
623 /* Microsoft OUI (00:50:F2) */
626 crc = crc32_be(crc, pos - 2, elen + 2);
629 /* OUI Type 1 - WPA IE */
631 elems->wpa_len = elen;
632 } else if (elen >= 5 && pos[3] == 2) {
633 /* OUI Type 2 - WMM IE */
635 elems->wmm_info = pos;
636 elems->wmm_info_len = elen;
637 } else if (pos[4] == 1) {
638 elems->wmm_param = pos;
639 elems->wmm_param_len = elen;
646 elems->rsn_len = elen;
648 case WLAN_EID_ERP_INFO:
649 elems->erp_info = pos;
650 elems->erp_info_len = elen;
652 case WLAN_EID_EXT_SUPP_RATES:
653 elems->ext_supp_rates = pos;
654 elems->ext_supp_rates_len = elen;
656 case WLAN_EID_HT_CAPABILITY:
657 if (elen >= sizeof(struct ieee80211_ht_cap))
658 elems->ht_cap_elem = (void *)pos;
660 case WLAN_EID_HT_INFORMATION:
661 if (elen >= sizeof(struct ieee80211_ht_info))
662 elems->ht_info_elem = (void *)pos;
664 case WLAN_EID_MESH_ID:
665 elems->mesh_id = pos;
666 elems->mesh_id_len = elen;
668 case WLAN_EID_MESH_CONFIG:
669 elems->mesh_config = pos;
670 elems->mesh_config_len = elen;
672 case WLAN_EID_PEER_LINK:
673 elems->peer_link = pos;
674 elems->peer_link_len = elen;
678 elems->preq_len = elen;
682 elems->prep_len = elen;
686 elems->perr_len = elen;
688 case WLAN_EID_CHANNEL_SWITCH:
689 elems->ch_switch_elem = pos;
690 elems->ch_switch_elem_len = elen;
693 if (!elems->quiet_elem) {
694 elems->quiet_elem = pos;
695 elems->quiet_elem_len = elen;
697 elems->num_of_quiet_elem++;
699 case WLAN_EID_COUNTRY:
700 elems->country_elem = pos;
701 elems->country_elem_len = elen;
703 case WLAN_EID_PWR_CONSTRAINT:
704 elems->pwr_constr_elem = pos;
705 elems->pwr_constr_elem_len = elen;
707 case WLAN_EID_TIMEOUT_INTERVAL:
708 elems->timeout_int = pos;
709 elems->timeout_int_len = elen;
722 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
724 struct ieee80211_local *local = sdata->local;
725 struct ieee80211_tx_queue_params qparam;
730 if (!local->ops->conf_tx)
733 memset(&qparam, 0, sizeof(qparam));
735 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
736 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
738 for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
739 /* Set defaults according to 802.11-2007 Table 7-37 */
748 qparam.cw_max = aCWmax;
749 qparam.cw_min = aCWmin;
753 default: /* never happens but let's not leave undefined */
755 qparam.cw_max = aCWmax;
756 qparam.cw_min = aCWmin;
761 qparam.cw_max = aCWmin;
762 qparam.cw_min = (aCWmin + 1) / 2 - 1;
764 qparam.txop = 6016/32;
766 qparam.txop = 3008/32;
770 qparam.cw_max = (aCWmin + 1) / 2 - 1;
771 qparam.cw_min = (aCWmin + 1) / 4 - 1;
773 qparam.txop = 3264/32;
775 qparam.txop = 1504/32;
780 drv_conf_tx(local, queue, &qparam);
784 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
785 const size_t supp_rates_len,
786 const u8 *supp_rates)
788 struct ieee80211_local *local = sdata->local;
789 int i, have_higher_than_11mbit = 0;
791 /* cf. IEEE 802.11 9.2.12 */
792 for (i = 0; i < supp_rates_len; i++)
793 if ((supp_rates[i] & 0x7f) * 5 > 110)
794 have_higher_than_11mbit = 1;
796 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
797 have_higher_than_11mbit)
798 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
800 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
802 ieee80211_set_wmm_default(sdata);
805 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
806 enum ieee80211_band band)
808 struct ieee80211_supported_band *sband;
809 struct ieee80211_rate *bitrates;
811 enum ieee80211_rate_flags mandatory_flag;
814 sband = local->hw.wiphy->bands[band];
817 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
820 if (band == IEEE80211_BAND_2GHZ)
821 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
823 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
825 bitrates = sband->bitrates;
827 for (i = 0; i < sband->n_bitrates; i++)
828 if (bitrates[i].flags & mandatory_flag)
829 mandatory_rates |= BIT(i);
830 return mandatory_rates;
833 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
834 u16 transaction, u16 auth_alg,
835 u8 *extra, size_t extra_len, const u8 *bssid,
836 const u8 *key, u8 key_len, u8 key_idx)
838 struct ieee80211_local *local = sdata->local;
840 struct ieee80211_mgmt *mgmt;
843 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
844 sizeof(*mgmt) + 6 + extra_len);
846 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
847 "frame\n", sdata->dev->name);
850 skb_reserve(skb, local->hw.extra_tx_headroom);
852 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
853 memset(mgmt, 0, 24 + 6);
854 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
855 IEEE80211_STYPE_AUTH);
856 memcpy(mgmt->da, bssid, ETH_ALEN);
857 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
858 memcpy(mgmt->bssid, bssid, ETH_ALEN);
859 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
860 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
861 mgmt->u.auth.status_code = cpu_to_le16(0);
863 memcpy(skb_put(skb, extra_len), extra, extra_len);
865 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
866 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
867 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
871 ieee80211_tx_skb(sdata, skb, 0);
874 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
875 const u8 *ie, size_t ie_len)
877 struct ieee80211_supported_band *sband;
878 u8 *pos, *supp_rates_len, *esupp_rates_len = NULL;
881 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
885 *pos++ = WLAN_EID_SUPP_RATES;
886 supp_rates_len = pos;
889 for (i = 0; i < sband->n_bitrates; i++) {
890 struct ieee80211_rate *rate = &sband->bitrates[i];
892 if (esupp_rates_len) {
893 *esupp_rates_len += 1;
894 } else if (*supp_rates_len == 8) {
895 *pos++ = WLAN_EID_EXT_SUPP_RATES;
896 esupp_rates_len = pos;
899 *supp_rates_len += 1;
901 *pos++ = rate->bitrate / 5;
904 if (sband->ht_cap.ht_supported) {
905 __le16 tmp = cpu_to_le16(sband->ht_cap.cap);
907 *pos++ = WLAN_EID_HT_CAPABILITY;
908 *pos++ = sizeof(struct ieee80211_ht_cap);
909 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
910 memcpy(pos, &tmp, sizeof(u16));
912 /* TODO: needs a define here for << 2 */
913 *pos++ = sband->ht_cap.ampdu_factor |
914 (sband->ht_cap.ampdu_density << 2);
915 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
916 pos += sizeof(sband->ht_cap.mcs);
917 pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
921 * If adding more here, adjust code in main.c
922 * that calculates local->scan_ies_len.
926 memcpy(pos, ie, ie_len);
933 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
934 const u8 *ssid, size_t ssid_len,
935 const u8 *ie, size_t ie_len)
937 struct ieee80211_local *local = sdata->local;
939 struct ieee80211_mgmt *mgmt;
942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
945 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
946 "request\n", sdata->dev->name);
949 skb_reserve(skb, local->hw.extra_tx_headroom);
951 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
953 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
954 IEEE80211_STYPE_PROBE_REQ);
955 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
957 memcpy(mgmt->da, dst, ETH_ALEN);
958 memcpy(mgmt->bssid, dst, ETH_ALEN);
960 memset(mgmt->da, 0xff, ETH_ALEN);
961 memset(mgmt->bssid, 0xff, ETH_ALEN);
963 pos = skb_put(skb, 2 + ssid_len);
964 *pos++ = WLAN_EID_SSID;
966 memcpy(pos, ssid, ssid_len);
969 skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len));
971 ieee80211_tx_skb(sdata, skb, 0);
974 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
975 struct ieee802_11_elems *elems,
976 enum ieee80211_band band)
978 struct ieee80211_supported_band *sband;
979 struct ieee80211_rate *bitrates;
983 sband = local->hw.wiphy->bands[band];
987 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
990 bitrates = sband->bitrates;
991 num_rates = sband->n_bitrates;
993 for (i = 0; i < elems->supp_rates_len +
994 elems->ext_supp_rates_len; i++) {
997 if (i < elems->supp_rates_len)
998 rate = elems->supp_rates[i];
999 else if (elems->ext_supp_rates)
1000 rate = elems->ext_supp_rates
1001 [i - elems->supp_rates_len];
1002 own_rate = 5 * (rate & 0x7f);
1003 for (j = 0; j < num_rates; j++)
1004 if (bitrates[j].bitrate == own_rate)
1005 supp_rates |= BIT(j);
1010 void ieee80211_stop_device(struct ieee80211_local *local)
1012 ieee80211_led_radio(local, false);
1014 cancel_work_sync(&local->reconfig_filter);
1017 flush_workqueue(local->workqueue);
1020 int ieee80211_reconfig(struct ieee80211_local *local)
1022 struct ieee80211_hw *hw = &local->hw;
1023 struct ieee80211_sub_if_data *sdata;
1024 struct ieee80211_if_init_conf conf;
1025 struct sta_info *sta;
1026 unsigned long flags;
1028 bool from_suspend = local->suspended;
1031 * We're going to start the hardware, at that point
1032 * we are no longer suspended and can RX frames.
1034 local->suspended = false;
1036 /* restart hardware */
1037 if (local->open_count) {
1038 res = drv_start(local);
1040 ieee80211_led_radio(local, true);
1043 /* add interfaces */
1044 list_for_each_entry(sdata, &local->interfaces, list) {
1045 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1046 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1047 netif_running(sdata->dev)) {
1048 conf.vif = &sdata->vif;
1049 conf.type = sdata->vif.type;
1050 conf.mac_addr = sdata->dev->dev_addr;
1051 res = drv_add_interface(local, &conf);
1056 if (local->ops->sta_notify) {
1057 spin_lock_irqsave(&local->sta_lock, flags);
1058 list_for_each_entry(sta, &local->sta_list, list) {
1060 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1061 sdata = container_of(sdata->bss,
1062 struct ieee80211_sub_if_data,
1065 drv_sta_notify(local, &sdata->vif, STA_NOTIFY_ADD,
1068 spin_unlock_irqrestore(&local->sta_lock, flags);
1071 /* Clear Suspend state so that ADDBA requests can be processed */
1075 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1076 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1077 clear_sta_flags(sta, WLAN_STA_SUSPEND);
1083 /* setup RTS threshold */
1084 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1086 /* reconfigure hardware */
1087 ieee80211_hw_config(local, ~0);
1089 ieee80211_configure_filter(local);
1091 /* Finally also reconfigure all the BSS information */
1092 list_for_each_entry(sdata, &local->interfaces, list) {
1094 if (!netif_running(sdata->dev))
1096 switch (sdata->vif.type) {
1097 case NL80211_IFTYPE_STATION:
1098 /* disable beacon change bits */
1099 changed &= ~(BSS_CHANGED_BEACON |
1100 BSS_CHANGED_BEACON_ENABLED);
1102 case NL80211_IFTYPE_ADHOC:
1103 case NL80211_IFTYPE_AP:
1104 case NL80211_IFTYPE_MESH_POINT:
1105 ieee80211_bss_info_change_notify(sdata, changed);
1107 case NL80211_IFTYPE_WDS:
1109 case NL80211_IFTYPE_AP_VLAN:
1110 case NL80211_IFTYPE_MONITOR:
1111 /* ignore virtual */
1113 case NL80211_IFTYPE_UNSPECIFIED:
1114 case __NL80211_IFTYPE_AFTER_LAST:
1121 list_for_each_entry(sdata, &local->interfaces, list)
1122 if (netif_running(sdata->dev))
1123 ieee80211_enable_keys(sdata);
1125 ieee80211_wake_queues_by_reason(hw,
1126 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1129 * If this is for hw restart things are still running.
1130 * We may want to change that later, however.
1136 local->suspended = false;
1138 list_for_each_entry(sdata, &local->interfaces, list) {
1139 switch(sdata->vif.type) {
1140 case NL80211_IFTYPE_STATION:
1141 ieee80211_sta_restart(sdata);
1143 case NL80211_IFTYPE_ADHOC:
1144 ieee80211_ibss_restart(sdata);
1146 case NL80211_IFTYPE_MESH_POINT:
1147 ieee80211_mesh_restart(sdata);
1154 add_timer(&local->sta_cleanup);
1156 spin_lock_irqsave(&local->sta_lock, flags);
1157 list_for_each_entry(sta, &local->sta_list, list)
1158 mesh_plink_restart(sta);
1159 spin_unlock_irqrestore(&local->sta_lock, flags);