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 <net/net_namespace.h>
24 #include <net/cfg80211.h>
25 #include <net/rtnetlink.h>
27 #include "ieee80211_i.h"
32 /* privid for wiphys to determine whether they belong to us or not */
33 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
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 };
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 };
44 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
46 struct ieee80211_local *local;
49 local = wiphy_priv(wiphy);
52 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
54 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
55 enum nl80211_iftype type)
57 __le16 fc = hdr->frame_control;
59 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
63 if (ieee80211_is_data(fc)) {
64 if (len < 24) /* drop incorrect hdr len (data) */
67 if (ieee80211_has_a4(fc))
69 if (ieee80211_has_tods(fc))
71 if (ieee80211_has_fromds(fc))
77 if (ieee80211_is_mgmt(fc)) {
78 if (len < 24) /* drop incorrect hdr len (mgmt) */
83 if (ieee80211_is_ctl(fc)) {
84 if(ieee80211_is_pspoll(fc))
87 if (ieee80211_is_back_req(fc)) {
89 case NL80211_IFTYPE_STATION:
91 case NL80211_IFTYPE_AP:
92 case NL80211_IFTYPE_AP_VLAN:
95 break; /* fall through to the return */
103 unsigned int ieee80211_hdrlen(__le16 fc)
105 unsigned int hdrlen = 24;
107 if (ieee80211_is_data(fc)) {
108 if (ieee80211_has_a4(fc))
110 if (ieee80211_is_data_qos(fc))
111 hdrlen += IEEE80211_QOS_CTL_LEN;
115 if (ieee80211_is_ctl(fc)) {
117 * ACK and CTS are 10 bytes, all others 16. To see how
118 * to get this condition consider
119 * subtype mask: 0b0000000011110000 (0x00F0)
120 * ACK subtype: 0b0000000011010000 (0x00D0)
121 * CTS subtype: 0b0000000011000000 (0x00C0)
122 * bits that matter: ^^^ (0x00E0)
123 * value of those: 0b0000000011000000 (0x00C0)
125 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
133 EXPORT_SYMBOL(ieee80211_hdrlen);
135 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
137 const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data;
140 if (unlikely(skb->len < 10))
142 hdrlen = ieee80211_hdrlen(hdr->frame_control);
143 if (unlikely(hdrlen > skb->len))
147 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
149 int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
151 int ae = meshhdr->flags & IEEE80211S_FLAGS_AE;
167 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
169 struct sk_buff *skb = tx->skb;
170 struct ieee80211_hdr *hdr;
173 hdr = (struct ieee80211_hdr *) skb->data;
174 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
175 } while ((skb = skb->next));
178 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
179 int rate, int erp, int short_preamble)
183 /* calculate duration (in microseconds, rounded up to next higher
184 * integer if it includes a fractional microsecond) to send frame of
185 * len bytes (does not include FCS) at the given rate. Duration will
188 * rate is in 100 kbps, so divident is multiplied by 10 in the
189 * DIV_ROUND_UP() operations.
192 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
196 * N_DBPS = DATARATE x 4
197 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
198 * (16 = SIGNAL time, 6 = tail bits)
199 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
202 * 802.11a - 17.5.2: aSIFSTime = 16 usec
203 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
204 * signal ext = 6 usec
206 dur = 16; /* SIFS + signal ext */
207 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
208 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
209 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
210 4 * rate); /* T_SYM x N_SYM */
213 * 802.11b or 802.11g with 802.11b compatibility:
214 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
215 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
217 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
218 * aSIFSTime = 10 usec
219 * aPreambleLength = 144 usec or 72 usec with short preamble
220 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
222 dur = 10; /* aSIFSTime = 10 usec */
223 dur += short_preamble ? (72 + 24) : (144 + 48);
225 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
231 /* Exported duration function for driver use */
232 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
233 struct ieee80211_vif *vif,
235 struct ieee80211_rate *rate)
237 struct ieee80211_local *local = hw_to_local(hw);
238 struct ieee80211_sub_if_data *sdata;
241 bool short_preamble = false;
245 sdata = vif_to_sdata(vif);
246 short_preamble = sdata->vif.bss_conf.use_short_preamble;
247 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
248 erp = rate->flags & IEEE80211_RATE_ERP_G;
251 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
254 return cpu_to_le16(dur);
256 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
258 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
259 struct ieee80211_vif *vif, size_t frame_len,
260 const struct ieee80211_tx_info *frame_txctl)
262 struct ieee80211_local *local = hw_to_local(hw);
263 struct ieee80211_rate *rate;
264 struct ieee80211_sub_if_data *sdata;
268 struct ieee80211_supported_band *sband;
270 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
272 short_preamble = false;
274 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
278 sdata = vif_to_sdata(vif);
279 short_preamble = sdata->vif.bss_conf.use_short_preamble;
280 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
281 erp = rate->flags & IEEE80211_RATE_ERP_G;
285 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
286 erp, short_preamble);
287 /* Data frame duration */
288 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
289 erp, short_preamble);
291 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
292 erp, short_preamble);
294 return cpu_to_le16(dur);
296 EXPORT_SYMBOL(ieee80211_rts_duration);
298 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
299 struct ieee80211_vif *vif,
301 const struct ieee80211_tx_info *frame_txctl)
303 struct ieee80211_local *local = hw_to_local(hw);
304 struct ieee80211_rate *rate;
305 struct ieee80211_sub_if_data *sdata;
309 struct ieee80211_supported_band *sband;
311 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
313 short_preamble = false;
315 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
318 sdata = vif_to_sdata(vif);
319 short_preamble = sdata->vif.bss_conf.use_short_preamble;
320 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
321 erp = rate->flags & IEEE80211_RATE_ERP_G;
324 /* Data frame duration */
325 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
326 erp, short_preamble);
327 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
329 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
330 erp, short_preamble);
333 return cpu_to_le16(dur);
335 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
337 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
338 enum queue_stop_reason reason)
340 struct ieee80211_local *local = hw_to_local(hw);
342 if (queue >= hw->queues) {
343 if (local->ampdu_ac_queue[queue - hw->queues] < 0)
347 * for virtual aggregation queues, we need to refcount the
348 * internal mac80211 disable (multiple times!), keep track of
349 * driver disable _and_ make sure the regular queue is
352 if (reason == IEEE80211_QUEUE_STOP_REASON_AGGREGATION)
353 local->amdpu_ac_stop_refcnt[queue - hw->queues]--;
355 __clear_bit(reason, &local->queue_stop_reasons[queue]);
357 if (local->queue_stop_reasons[queue] ||
358 local->amdpu_ac_stop_refcnt[queue - hw->queues])
361 /* now go on to treat the corresponding regular queue */
362 queue = local->ampdu_ac_queue[queue - hw->queues];
363 reason = IEEE80211_QUEUE_STOP_REASON_AGGREGATION;
366 __clear_bit(reason, &local->queue_stop_reasons[queue]);
368 if (local->queue_stop_reasons[queue] != 0)
369 /* someone still has this queue stopped */
372 if (test_bit(queue, local->queues_pending)) {
373 set_bit(queue, local->queues_pending_run);
374 tasklet_schedule(&local->tx_pending_tasklet);
376 netif_wake_subqueue(local->mdev, queue);
380 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
381 enum queue_stop_reason reason)
383 struct ieee80211_local *local = hw_to_local(hw);
386 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
387 __ieee80211_wake_queue(hw, queue, reason);
388 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
391 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
393 ieee80211_wake_queue_by_reason(hw, queue,
394 IEEE80211_QUEUE_STOP_REASON_DRIVER);
396 EXPORT_SYMBOL(ieee80211_wake_queue);
398 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
399 enum queue_stop_reason reason)
401 struct ieee80211_local *local = hw_to_local(hw);
403 if (queue >= hw->queues) {
404 if (local->ampdu_ac_queue[queue - hw->queues] < 0)
408 * for virtual aggregation queues, we need to refcount the
409 * internal mac80211 disable (multiple times!), keep track of
410 * driver disable _and_ make sure the regular queue is
413 if (reason == IEEE80211_QUEUE_STOP_REASON_AGGREGATION)
414 local->amdpu_ac_stop_refcnt[queue - hw->queues]++;
416 __set_bit(reason, &local->queue_stop_reasons[queue]);
418 /* now go on to treat the corresponding regular queue */
419 queue = local->ampdu_ac_queue[queue - hw->queues];
420 reason = IEEE80211_QUEUE_STOP_REASON_AGGREGATION;
423 __set_bit(reason, &local->queue_stop_reasons[queue]);
425 netif_stop_subqueue(local->mdev, queue);
428 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
429 enum queue_stop_reason reason)
431 struct ieee80211_local *local = hw_to_local(hw);
434 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
435 __ieee80211_stop_queue(hw, queue, reason);
436 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
439 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
441 ieee80211_stop_queue_by_reason(hw, queue,
442 IEEE80211_QUEUE_STOP_REASON_DRIVER);
444 EXPORT_SYMBOL(ieee80211_stop_queue);
446 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
447 enum queue_stop_reason reason)
449 struct ieee80211_local *local = hw_to_local(hw);
453 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
455 for (i = 0; i < hw->queues; i++)
456 __ieee80211_stop_queue(hw, i, reason);
458 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
461 void ieee80211_stop_queues(struct ieee80211_hw *hw)
463 ieee80211_stop_queues_by_reason(hw,
464 IEEE80211_QUEUE_STOP_REASON_DRIVER);
466 EXPORT_SYMBOL(ieee80211_stop_queues);
468 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
470 struct ieee80211_local *local = hw_to_local(hw);
473 if (queue >= hw->queues) {
474 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
475 queue = local->ampdu_ac_queue[queue - hw->queues];
476 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
481 return __netif_subqueue_stopped(local->mdev, queue);
483 EXPORT_SYMBOL(ieee80211_queue_stopped);
485 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
486 enum queue_stop_reason reason)
488 struct ieee80211_local *local = hw_to_local(hw);
492 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
494 for (i = 0; i < hw->queues + hw->ampdu_queues; i++)
495 __ieee80211_wake_queue(hw, i, reason);
497 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
500 void ieee80211_wake_queues(struct ieee80211_hw *hw)
502 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
504 EXPORT_SYMBOL(ieee80211_wake_queues);
506 void ieee80211_iterate_active_interfaces(
507 struct ieee80211_hw *hw,
508 void (*iterator)(void *data, u8 *mac,
509 struct ieee80211_vif *vif),
512 struct ieee80211_local *local = hw_to_local(hw);
513 struct ieee80211_sub_if_data *sdata;
515 mutex_lock(&local->iflist_mtx);
517 list_for_each_entry(sdata, &local->interfaces, list) {
518 switch (sdata->vif.type) {
519 case __NL80211_IFTYPE_AFTER_LAST:
520 case NL80211_IFTYPE_UNSPECIFIED:
521 case NL80211_IFTYPE_MONITOR:
522 case NL80211_IFTYPE_AP_VLAN:
524 case NL80211_IFTYPE_AP:
525 case NL80211_IFTYPE_STATION:
526 case NL80211_IFTYPE_ADHOC:
527 case NL80211_IFTYPE_WDS:
528 case NL80211_IFTYPE_MESH_POINT:
531 if (netif_running(sdata->dev))
532 iterator(data, sdata->dev->dev_addr,
536 mutex_unlock(&local->iflist_mtx);
538 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
540 void ieee80211_iterate_active_interfaces_atomic(
541 struct ieee80211_hw *hw,
542 void (*iterator)(void *data, u8 *mac,
543 struct ieee80211_vif *vif),
546 struct ieee80211_local *local = hw_to_local(hw);
547 struct ieee80211_sub_if_data *sdata;
551 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
552 switch (sdata->vif.type) {
553 case __NL80211_IFTYPE_AFTER_LAST:
554 case NL80211_IFTYPE_UNSPECIFIED:
555 case NL80211_IFTYPE_MONITOR:
556 case NL80211_IFTYPE_AP_VLAN:
558 case NL80211_IFTYPE_AP:
559 case NL80211_IFTYPE_STATION:
560 case NL80211_IFTYPE_ADHOC:
561 case NL80211_IFTYPE_WDS:
562 case NL80211_IFTYPE_MESH_POINT:
565 if (netif_running(sdata->dev))
566 iterator(data, sdata->dev->dev_addr,
572 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
574 void ieee802_11_parse_elems(u8 *start, size_t len,
575 struct ieee802_11_elems *elems)
580 memset(elems, 0, sizeof(*elems));
581 elems->ie_start = start;
582 elems->total_len = len;
597 elems->ssid_len = elen;
599 case WLAN_EID_SUPP_RATES:
600 elems->supp_rates = pos;
601 elems->supp_rates_len = elen;
603 case WLAN_EID_FH_PARAMS:
604 elems->fh_params = pos;
605 elems->fh_params_len = elen;
607 case WLAN_EID_DS_PARAMS:
608 elems->ds_params = pos;
609 elems->ds_params_len = elen;
611 case WLAN_EID_CF_PARAMS:
612 elems->cf_params = pos;
613 elems->cf_params_len = elen;
617 elems->tim_len = elen;
619 case WLAN_EID_IBSS_PARAMS:
620 elems->ibss_params = pos;
621 elems->ibss_params_len = elen;
623 case WLAN_EID_CHALLENGE:
624 elems->challenge = pos;
625 elems->challenge_len = elen;
628 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
630 /* Microsoft OUI (00:50:F2) */
632 /* OUI Type 1 - WPA IE */
634 elems->wpa_len = elen;
635 } else if (elen >= 5 && pos[3] == 2) {
637 elems->wmm_info = pos;
638 elems->wmm_info_len = elen;
639 } else if (pos[4] == 1) {
640 elems->wmm_param = pos;
641 elems->wmm_param_len = elen;
648 elems->rsn_len = elen;
650 case WLAN_EID_ERP_INFO:
651 elems->erp_info = pos;
652 elems->erp_info_len = elen;
654 case WLAN_EID_EXT_SUPP_RATES:
655 elems->ext_supp_rates = pos;
656 elems->ext_supp_rates_len = elen;
658 case WLAN_EID_HT_CAPABILITY:
659 if (elen >= sizeof(struct ieee80211_ht_cap))
660 elems->ht_cap_elem = (void *)pos;
662 case WLAN_EID_HT_INFORMATION:
663 if (elen >= sizeof(struct ieee80211_ht_info))
664 elems->ht_info_elem = (void *)pos;
666 case WLAN_EID_MESH_ID:
667 elems->mesh_id = pos;
668 elems->mesh_id_len = elen;
670 case WLAN_EID_MESH_CONFIG:
671 elems->mesh_config = pos;
672 elems->mesh_config_len = elen;
674 case WLAN_EID_PEER_LINK:
675 elems->peer_link = pos;
676 elems->peer_link_len = elen;
680 elems->preq_len = elen;
684 elems->prep_len = elen;
688 elems->perr_len = elen;
690 case WLAN_EID_CHANNEL_SWITCH:
691 elems->ch_switch_elem = pos;
692 elems->ch_switch_elem_len = elen;
695 if (!elems->quiet_elem) {
696 elems->quiet_elem = pos;
697 elems->quiet_elem_len = elen;
699 elems->num_of_quiet_elem++;
701 case WLAN_EID_COUNTRY:
702 elems->country_elem = pos;
703 elems->country_elem_len = elen;
705 case WLAN_EID_PWR_CONSTRAINT:
706 elems->pwr_constr_elem = pos;
707 elems->pwr_constr_elem_len = elen;
709 case WLAN_EID_TIMEOUT_INTERVAL:
710 elems->timeout_int = pos;
711 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;
728 if (!local->ops->conf_tx)
731 memset(&qparam, 0, sizeof(qparam));
735 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
736 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
741 qparam.cw_max = 1023;
744 for (i = 0; i < local_to_hw(local)->queues; i++)
745 local->ops->conf_tx(local_to_hw(local), i, &qparam);
748 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
749 const size_t supp_rates_len,
750 const u8 *supp_rates)
752 struct ieee80211_local *local = sdata->local;
753 int i, have_higher_than_11mbit = 0;
755 /* cf. IEEE 802.11 9.2.12 */
756 for (i = 0; i < supp_rates_len; i++)
757 if ((supp_rates[i] & 0x7f) * 5 > 110)
758 have_higher_than_11mbit = 1;
760 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
761 have_higher_than_11mbit)
762 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
764 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
766 ieee80211_set_wmm_default(sdata);
769 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
772 skb->dev = sdata->local->mdev;
773 skb_set_mac_header(skb, 0);
774 skb_set_network_header(skb, 0);
775 skb_set_transport_header(skb, 0);
777 skb->iif = sdata->dev->ifindex;
778 skb->do_not_encrypt = !encrypt;
783 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
786 struct ieee80211_channel *chan;
787 struct ieee80211_local *local = sdata->local;
789 chan = ieee80211_get_channel(local->hw.wiphy, freqMHz);
791 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
792 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
793 chan->flags & IEEE80211_CHAN_NO_IBSS)
795 local->oper_channel = chan;
796 local->oper_channel_type = NL80211_CHAN_NO_HT;
798 if (local->sw_scanning || local->hw_scanning)
801 ret = ieee80211_hw_config(
802 local, IEEE80211_CONF_CHANGE_CHANNEL);
808 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
809 enum ieee80211_band band)
811 struct ieee80211_supported_band *sband;
812 struct ieee80211_rate *bitrates;
814 enum ieee80211_rate_flags mandatory_flag;
817 sband = local->hw.wiphy->bands[band];
820 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
823 if (band == IEEE80211_BAND_2GHZ)
824 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
826 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
828 bitrates = sband->bitrates;
830 for (i = 0; i < sband->n_bitrates; i++)
831 if (bitrates[i].flags & mandatory_flag)
832 mandatory_rates |= BIT(i);
833 return mandatory_rates;
836 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
837 u16 transaction, u16 auth_alg,
838 u8 *extra, size_t extra_len,
839 const u8 *bssid, int encrypt)
841 struct ieee80211_local *local = sdata->local;
843 struct ieee80211_mgmt *mgmt;
845 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
846 sizeof(*mgmt) + 6 + extra_len);
848 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
849 "frame\n", sdata->dev->name);
852 skb_reserve(skb, local->hw.extra_tx_headroom);
854 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
855 memset(mgmt, 0, 24 + 6);
856 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
857 IEEE80211_STYPE_AUTH);
859 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
860 memcpy(mgmt->da, bssid, ETH_ALEN);
861 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
862 memcpy(mgmt->bssid, bssid, ETH_ALEN);
863 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
864 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
865 mgmt->u.auth.status_code = cpu_to_le16(0);
867 memcpy(skb_put(skb, extra_len), extra, extra_len);
869 ieee80211_tx_skb(sdata, skb, encrypt);
872 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
873 u8 *ssid, size_t ssid_len,
874 u8 *ie, size_t ie_len)
876 struct ieee80211_local *local = sdata->local;
877 struct ieee80211_supported_band *sband;
879 struct ieee80211_mgmt *mgmt;
880 u8 *pos, *supp_rates, *esupp_rates = NULL;
883 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
886 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
887 "request\n", sdata->dev->name);
890 skb_reserve(skb, local->hw.extra_tx_headroom);
892 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
894 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
895 IEEE80211_STYPE_PROBE_REQ);
896 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
898 memcpy(mgmt->da, dst, ETH_ALEN);
899 memcpy(mgmt->bssid, dst, ETH_ALEN);
901 memset(mgmt->da, 0xff, ETH_ALEN);
902 memset(mgmt->bssid, 0xff, ETH_ALEN);
904 pos = skb_put(skb, 2 + ssid_len);
905 *pos++ = WLAN_EID_SSID;
907 memcpy(pos, ssid, ssid_len);
909 supp_rates = skb_put(skb, 2);
910 supp_rates[0] = WLAN_EID_SUPP_RATES;
912 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
914 for (i = 0; i < sband->n_bitrates; i++) {
915 struct ieee80211_rate *rate = &sband->bitrates[i];
917 pos = skb_put(skb, 1);
919 } else if (supp_rates[1] == 8) {
920 esupp_rates = skb_put(skb, 3);
921 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
923 pos = &esupp_rates[2];
925 pos = skb_put(skb, 1);
928 *pos = rate->bitrate / 5;
932 memcpy(skb_put(skb, ie_len), ie, ie_len);
934 ieee80211_tx_skb(sdata, skb, 0);
937 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
938 struct ieee802_11_elems *elems,
939 enum ieee80211_band band)
941 struct ieee80211_supported_band *sband;
942 struct ieee80211_rate *bitrates;
946 sband = local->hw.wiphy->bands[band];
950 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
953 bitrates = sband->bitrates;
954 num_rates = sband->n_bitrates;
956 for (i = 0; i < elems->supp_rates_len +
957 elems->ext_supp_rates_len; i++) {
960 if (i < elems->supp_rates_len)
961 rate = elems->supp_rates[i];
962 else if (elems->ext_supp_rates)
963 rate = elems->ext_supp_rates
964 [i - elems->supp_rates_len];
965 own_rate = 5 * (rate & 0x7f);
966 for (j = 0; j < num_rates; j++)
967 if (bitrates[j].bitrate == own_rate)
968 supp_rates |= BIT(j);