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mac80211: add ieee80211_vif_change_bandwidth
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35#define IEEE80211_AUTH_MAX_TRIES 3
36#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 40
180205bd
BG		 41static int max_nullfunc_tries = 2;
42module_param(max_nullfunc_tries, int, 0644);
43MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46static int max_probe_tries = 5;
47module_param(max_probe_tries, int, 0644);
48MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 50
51/*
7ccc8bd7
FF		 52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
b291ba11 58 */
7ccc8bd7
FF		 59#define IEEE80211_BEACON_LOSS_COUNT 7
60
b291ba11
JB		 61/*
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
64 */
d1c5091f 65#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 66/*
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
70 */
180205bd
BG		 71static int probe_wait_ms = 500;
72module_param(probe_wait_ms, int, 0644);
73MODULE_PARM_DESC(probe_wait_ms,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
f0706e82 76
17e4ec14
JM		 77/*
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
80 * between 1 and 15.
81 */
82#define IEEE80211_SIGNAL_AVE_WEIGHT 3
83
391a200a
JM		 84/*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
5bb644a0
JB		 90#define TMR_RUNNING_TIMER 0
91#define TMR_RUNNING_CHANSW 1
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
7eeff74c
JB		 149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
150 return;
151
b291ba11 152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 154}
155
be099e82
LR		 156void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
157{
0c699c3a
LR		 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159
8628172f
SG		 160 if (unlikely(!sdata->u.mgd.associated))
161 return;
162
be099e82
LR		 163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
164 return;
165
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 168
169 ifmgd->probe_send_count = 0;
be099e82
LR		 170}
171
5484e237 172static int ecw2cw(int ecw)
60f8b39c 173{
5484e237 174 return (1 << ecw) - 1;
60f8b39c
JB		 175}
176
24398e39 177static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
1128958d 178 struct sta_info *sta,
24398e39
JB		 179 struct ieee80211_ht_operation *ht_oper,
180 const u8 *bssid, bool reconfig)
d5522e03
JB		 181{
182 struct ieee80211_local *local = sdata->local;
183 struct ieee80211_supported_band *sband;
55de908a 184 struct ieee80211_channel *chan;
d5522e03 185 u32 changed = 0;
9ed6bcce 186 u16 ht_opmode;
64f68e5d 187 bool disable_40 = false;
d5522e03 188
1128958d
JB		 189 if (WARN_ON_ONCE(!sta))
190 return 0;
191
f2d9330e 192 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 193 sband = local->hw.wiphy->bands[chan->band];
d5522e03 194
4bf88530
JB		 195 switch (sdata->vif.bss_conf.chandef.width) {
196 case NL80211_CHAN_WIDTH_40:
f2d9330e 197 if (chan->center_freq >
4bf88530 198 sdata->vif.bss_conf.chandef.center_freq1 &&
75e6934a 199 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d 200 disable_40 = true;
f2d9330e 201 if (chan->center_freq <
4bf88530 202 sdata->vif.bss_conf.chandef.center_freq1 &&
75e6934a 203 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 204 disable_40 = true;
205 break;
206 default:
207 break;
208 }
d5522e03 209
24398e39
JB		 210 /* This can change during the lifetime of the BSS */
211 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 212 disable_40 = true;
213
e1a0c6b3 214 if (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
64f68e5d
JB		 215 disable_40 = true;
216
1128958d 217 if (disable_40 != (sta->sta.bandwidth < IEEE80211_STA_RX_BW_40)) {
64f68e5d 218 if (disable_40)
e1a0c6b3 219 sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
64f68e5d 220 else
e1a0c6b3 221 sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
7cc44ed4 222
1128958d
JB		 223 if (reconfig)
224 rate_control_rate_update(local, sband, sta,
225 IEEE80211_RC_BW_CHANGED);
0aaffa9b 226 }
d5522e03 227
074d46d1 228 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 229
230 /* if bss configuration changed store the new one */
24398e39 231 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 232 changed |= BSS_CHANGED_HT;
9ed6bcce 233 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 234 }
235
236 return changed;
237}
238
9c6bd790
JB		 239/* frame sending functions */
240
66e67e41
JB		 241static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
242 struct ieee80211_supported_band *sband,
243 u32 *rates)
244{
245 int i, j, count;
246 *rates = 0;
247 count = 0;
248 for (i = 0; i < supp_rates_len; i++) {
249 int rate = (supp_rates[i] & 0x7F) * 5;
250
251 for (j = 0; j < sband->n_bitrates; j++)
252 if (sband->bitrates[j].bitrate == rate) {
253 *rates |= BIT(j);
254 count++;
255 break;
256 }
257 }
258
259 return count;
260}
261
262static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 263 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 264 struct ieee80211_supported_band *sband,
265 struct ieee80211_channel *channel,
266 enum ieee80211_smps_mode smps)
267{
66e67e41
JB		 268 u8 *pos;
269 u32 flags = channel->flags;
270 u16 cap;
271 struct ieee80211_sta_ht_cap ht_cap;
272
273 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
274
66e67e41
JB		 275 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
276 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
277
66e67e41
JB		 278 /* determine capability flags */
279 cap = ht_cap.cap;
280
9dde6423 281 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 282 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
283 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
284 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
285 cap &= ~IEEE80211_HT_CAP_SGI_40;
286 }
287 break;
288 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
289 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
290 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
291 cap &= ~IEEE80211_HT_CAP_SGI_40;
292 }
293 break;
294 }
295
24398e39
JB		 296 /*
297 * If 40 MHz was disabled associate as though we weren't
298 * capable of 40 MHz -- some broken APs will never fall
299 * back to trying to transmit in 20 MHz.
300 */
301 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
302 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
303 cap &= ~IEEE80211_HT_CAP_SGI_40;
304 }
305
66e67e41
JB		 306 /* set SM PS mode properly */
307 cap &= ~IEEE80211_HT_CAP_SM_PS;
308 switch (smps) {
309 case IEEE80211_SMPS_AUTOMATIC:
310 case IEEE80211_SMPS_NUM_MODES:
311 WARN_ON(1);
312 case IEEE80211_SMPS_OFF:
313 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
314 IEEE80211_HT_CAP_SM_PS_SHIFT;
315 break;
316 case IEEE80211_SMPS_STATIC:
317 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
318 IEEE80211_HT_CAP_SM_PS_SHIFT;
319 break;
320 case IEEE80211_SMPS_DYNAMIC:
321 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
322 IEEE80211_HT_CAP_SM_PS_SHIFT;
323 break;
324 }
325
326 /* reserve and fill IE */
327 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
328 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
329}
330
d545daba
MP		 331static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
332 struct sk_buff *skb,
b08fbbd8
JB		 333 struct ieee80211_supported_band *sband,
334 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 335{
336 u8 *pos;
337 u32 cap;
338 struct ieee80211_sta_vht_cap vht_cap;
b08fbbd8 339 int i;
d545daba
MP		 340
341 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
342
343 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
344
345 /* determine capability flags */
346 cap = vht_cap.cap;
347
f2d9d270
JB		 348 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
349 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
350 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
351 }
352
353 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
354 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
355 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
356 }
357
b08fbbd8
JB		 358 /*
359 * Some APs apparently get confused if our capabilities are better
360 * than theirs, so restrict what we advertise in the assoc request.
361 */
362 if (!(ap_vht_cap->vht_cap_info &
363 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
364 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
365
366 if (!(ap_vht_cap->vht_cap_info &
367 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
368 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
369 IEEE80211_VHT_CAP_RXSTBC_3 |
370 IEEE80211_VHT_CAP_RXSTBC_4);
371
372 for (i = 0; i < 8; i++) {
373 int shift = i * 2;
374 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
375 u16 ap_mcs, our_mcs;
376
377 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
378 mask) >> shift;
379 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
380 mask) >> shift;
381
382 switch (ap_mcs) {
383 default:
384 if (our_mcs <= ap_mcs)
385 break;
386 /* fall through */
387 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
388 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
389 vht_cap.vht_mcs.rx_mcs_map |=
390 cpu_to_le16(ap_mcs << shift);
391 }
392 }
393
d545daba 394 /* reserve and fill IE */
d4950281 395 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 396 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
397}
398
66e67e41
JB		 399static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
400{
401 struct ieee80211_local *local = sdata->local;
402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
403 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
404 struct sk_buff *skb;
405 struct ieee80211_mgmt *mgmt;
406 u8 *pos, qos_info;
407 size_t offset = 0, noffset;
408 int i, count, rates_len, supp_rates_len;
409 u16 capab;
410 struct ieee80211_supported_band *sband;
55de908a
JB		 411 struct ieee80211_chanctx_conf *chanctx_conf;
412 struct ieee80211_channel *chan;
66e67e41 413 u32 rates = 0;
66e67e41
JB		 414
415 lockdep_assert_held(&ifmgd->mtx);
416
55de908a
JB		 417 rcu_read_lock();
418 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
419 if (WARN_ON(!chanctx_conf)) {
420 rcu_read_unlock();
421 return;
422 }
4bf88530 423 chan = chanctx_conf->def.chan;
55de908a
JB		 424 rcu_read_unlock();
425 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 426
427 if (assoc_data->supp_rates_len) {
428 /*
429 * Get all rates supported by the device and the AP as
430 * some APs don't like getting a superset of their rates
431 * in the association request (e.g. D-Link DAP 1353 in
432 * b-only mode)...
433 */
434 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
435 assoc_data->supp_rates_len,
436 sband, &rates);
437 } else {
438 /*
439 * In case AP not provide any supported rates information
440 * before association, we send information element(s) with
441 * all rates that we support.
442 */
443 rates = ~0;
444 rates_len = sband->n_bitrates;
445 }
446
447 skb = alloc_skb(local->hw.extra_tx_headroom +
448 sizeof(*mgmt) + /* bit too much but doesn't matter */
449 2 + assoc_data->ssid_len + /* SSID */
450 4 + rates_len + /* (extended) rates */
451 4 + /* power capability */
452 2 + 2 * sband->n_channels + /* supported channels */
453 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 454 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 455 assoc_data->ie_len + /* extra IEs */
456 9, /* WMM */
457 GFP_KERNEL);
458 if (!skb)
459 return;
460
461 skb_reserve(skb, local->hw.extra_tx_headroom);
462
463 capab = WLAN_CAPABILITY_ESS;
464
465 if (sband->band == IEEE80211_BAND_2GHZ) {
466 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
467 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
468 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
469 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
470 }
471
472 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
473 capab |= WLAN_CAPABILITY_PRIVACY;
474
475 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
476 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
477 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
478
479 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
480 memset(mgmt, 0, 24);
481 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
482 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
483 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
484
485 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
486 skb_put(skb, 10);
487 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
488 IEEE80211_STYPE_REASSOC_REQ);
489 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
490 mgmt->u.reassoc_req.listen_interval =
491 cpu_to_le16(local->hw.conf.listen_interval);
492 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
493 ETH_ALEN);
494 } else {
495 skb_put(skb, 4);
496 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
497 IEEE80211_STYPE_ASSOC_REQ);
498 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
499 mgmt->u.assoc_req.listen_interval =
500 cpu_to_le16(local->hw.conf.listen_interval);
501 }
502
503 /* SSID */
504 pos = skb_put(skb, 2 + assoc_data->ssid_len);
505 *pos++ = WLAN_EID_SSID;
506 *pos++ = assoc_data->ssid_len;
507 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
508
509 /* add all rates which were marked to be used above */
510 supp_rates_len = rates_len;
511 if (supp_rates_len > 8)
512 supp_rates_len = 8;
513
514 pos = skb_put(skb, supp_rates_len + 2);
515 *pos++ = WLAN_EID_SUPP_RATES;
516 *pos++ = supp_rates_len;
517
518 count = 0;
519 for (i = 0; i < sband->n_bitrates; i++) {
520 if (BIT(i) & rates) {
521 int rate = sband->bitrates[i].bitrate;
522 *pos++ = (u8) (rate / 5);
523 if (++count == 8)
524 break;
525 }
526 }
527
528 if (rates_len > count) {
529 pos = skb_put(skb, rates_len - count + 2);
530 *pos++ = WLAN_EID_EXT_SUPP_RATES;
531 *pos++ = rates_len - count;
532
533 for (i++; i < sband->n_bitrates; i++) {
534 if (BIT(i) & rates) {
535 int rate = sband->bitrates[i].bitrate;
536 *pos++ = (u8) (rate / 5);
537 }
538 }
539 }
540
541 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
542 /* 1. power capabilities */
543 pos = skb_put(skb, 4);
544 *pos++ = WLAN_EID_PWR_CAPABILITY;
545 *pos++ = 2;
546 *pos++ = 0; /* min tx power */
55de908a 547 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 548
549 /* 2. supported channels */
550 /* TODO: get this in reg domain format */
551 pos = skb_put(skb, 2 * sband->n_channels + 2);
552 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
553 *pos++ = 2 * sband->n_channels;
554 for (i = 0; i < sband->n_channels; i++) {
555 *pos++ = ieee80211_frequency_to_channel(
556 sband->channels[i].center_freq);
557 *pos++ = 1; /* one channel in the subband*/
558 }
559 }
560
561 /* if present, add any custom IEs that go before HT */
562 if (assoc_data->ie_len && assoc_data->ie) {
563 static const u8 before_ht[] = {
564 WLAN_EID_SSID,
565 WLAN_EID_SUPP_RATES,
566 WLAN_EID_EXT_SUPP_RATES,
567 WLAN_EID_PWR_CAPABILITY,
568 WLAN_EID_SUPPORTED_CHANNELS,
569 WLAN_EID_RSN,
570 WLAN_EID_QOS_CAPA,
571 WLAN_EID_RRM_ENABLED_CAPABILITIES,
572 WLAN_EID_MOBILITY_DOMAIN,
573 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
574 };
575 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
576 before_ht, ARRAY_SIZE(before_ht),
577 offset);
578 pos = skb_put(skb, noffset - offset);
579 memcpy(pos, assoc_data->ie + offset, noffset - offset);
580 offset = noffset;
581 }
582
f2d9d270
JB		 583 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
584 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
585 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
586
a8243b72 587 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 588 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 589 sband, chan, sdata->smps_mode);
66e67e41 590
d545daba 591 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 592 ieee80211_add_vht_ie(sdata, skb, sband,
593 &assoc_data->ap_vht_cap);
d545daba 594
66e67e41
JB		 595 /* if present, add any custom non-vendor IEs that go after HT */
596 if (assoc_data->ie_len && assoc_data->ie) {
597 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
598 assoc_data->ie_len,
599 offset);
600 pos = skb_put(skb, noffset - offset);
601 memcpy(pos, assoc_data->ie + offset, noffset - offset);
602 offset = noffset;
603 }
604
76f0303d
JB		 605 if (assoc_data->wmm) {
606 if (assoc_data->uapsd) {
dc41e4d4
EP		 607 qos_info = ifmgd->uapsd_queues;
608 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 609 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
610 } else {
611 qos_info = 0;
612 }
613
614 pos = skb_put(skb, 9);
615 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
616 *pos++ = 7; /* len */
617 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
618 *pos++ = 0x50;
619 *pos++ = 0xf2;
620 *pos++ = 2; /* WME */
621 *pos++ = 0; /* WME info */
622 *pos++ = 1; /* WME ver */
623 *pos++ = qos_info;
624 }
625
626 /* add any remaining custom (i.e. vendor specific here) IEs */
627 if (assoc_data->ie_len && assoc_data->ie) {
628 noffset = assoc_data->ie_len;
629 pos = skb_put(skb, noffset - offset);
630 memcpy(pos, assoc_data->ie + offset, noffset - offset);
631 }
632
a1845fc7
JB		 633 drv_mgd_prepare_tx(local, sdata);
634
66e67e41 635 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 636 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
637 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
638 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 639 ieee80211_tx_skb(sdata, skb);
640}
641
572e0012
KV		 642void ieee80211_send_pspoll(struct ieee80211_local *local,
643 struct ieee80211_sub_if_data *sdata)
644{
572e0012
KV		 645 struct ieee80211_pspoll *pspoll;
646 struct sk_buff *skb;
572e0012 647
d8cd189e
KV		 648 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
649 if (!skb)
572e0012 650 return;
572e0012 651
d8cd189e
KV		 652 pspoll = (struct ieee80211_pspoll *) skb->data;
653 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 654
62ae67be
JB		 655 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
656 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 657}
658
965bedad
JB		 659void ieee80211_send_nullfunc(struct ieee80211_local *local,
660 struct ieee80211_sub_if_data *sdata,
661 int powersave)
662{
663 struct sk_buff *skb;
d8cd189e 664 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 666
d8cd189e
KV		 667 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
668 if (!skb)
965bedad 669 return;
965bedad 670
d8cd189e 671 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 672 if (powersave)
d8cd189e 673 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 674
6c17b77b
SF		 675 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
676 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 677 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
678 IEEE80211_STA_CONNECTION_POLL))
679 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
680
62ae67be 681 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 682}
683
d524215f
FF		 684static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
685 struct ieee80211_sub_if_data *sdata)
686{
687 struct sk_buff *skb;
688 struct ieee80211_hdr *nullfunc;
689 __le16 fc;
690
691 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
692 return;
693
694 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 695 if (!skb)
d524215f 696 return;
d15b8459 697
d524215f
FF		 698 skb_reserve(skb, local->hw.extra_tx_headroom);
699
700 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
701 memset(nullfunc, 0, 30);
702 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
703 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
704 nullfunc->frame_control = fc;
705 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
706 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
707 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
708 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
709
710 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
711 ieee80211_tx_skb(sdata, skb);
712}
713
cc32abd4
JB		 714/* spectrum management related things */
715static void ieee80211_chswitch_work(struct work_struct *work)
716{
717 struct ieee80211_sub_if_data *sdata =
718 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
720
9607e6b6 721 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 722 return;
723
77fdaa12
JB		 724 mutex_lock(&ifmgd->mtx);
725 if (!ifmgd->associated)
726 goto out;
cc32abd4 727
55de908a 728 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 729 if (!sdata->local->ops->channel_switch) {
730 /* call "hw_config" only if doing sw channel switch */
731 ieee80211_hw_config(sdata->local,
732 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 733 } else {
734 /* update the device channel directly */
55de908a 735 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 736 }
77fdaa12 737
cc32abd4 738 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 739 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 740
57eebdf3 741 /* XXX: wait for a beacon first? */
cc32abd4
JB		 742 ieee80211_wake_queues_by_reason(&sdata->local->hw,
743 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 744 out:
745 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
746 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 747}
748
5ce6e438
JB		 749void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
750{
55de908a
JB		 751 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
752 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 753
754 trace_api_chswitch_done(sdata, success);
755 if (!success) {
882a7c69
JB		 756 sdata_info(sdata,
757 "driver channel switch failed, disconnecting\n");
758 ieee80211_queue_work(&sdata->local->hw,
759 &ifmgd->csa_connection_drop_work);
760 } else {
761 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 762 }
5ce6e438
JB		 763}
764EXPORT_SYMBOL(ieee80211_chswitch_done);
765
cc32abd4
JB		 766static void ieee80211_chswitch_timer(unsigned long data)
767{
768 struct ieee80211_sub_if_data *sdata =
769 (struct ieee80211_sub_if_data *) data;
770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
771
5bb644a0
JB		 772 if (sdata->local->quiescing) {
773 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
774 return;
775 }
776
42935eca 777 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 778}
779
780void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
781 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 782 struct ieee80211_bss *bss,
783 u64 timestamp)
cc32abd4 784{
0c1ad2ca
JB		 785 struct cfg80211_bss *cbss =
786 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 787 struct ieee80211_channel *new_ch;
788 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 789 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
790 cbss->channel->band);
55de908a 791 struct ieee80211_chanctx *chanctx;
cc32abd4 792
77fdaa12
JB		 793 ASSERT_MGD_MTX(ifmgd);
794
795 if (!ifmgd->associated)
cc32abd4
JB		 796 return;
797
fbe9c429 798 if (sdata->local->scanning)
cc32abd4
JB		 799 return;
800
801 /* Disregard subsequent beacons if we are already running a timer
802 processing a CSA */
803
804 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
805 return;
806
807 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 808 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
809 sdata_info(sdata,
810 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
811 ifmgd->associated->bssid, new_freq);
812 ieee80211_queue_work(&sdata->local->hw,
813 &ifmgd->csa_connection_drop_work);
cc32abd4 814 return;
882a7c69 815 }
cc32abd4 816
57eebdf3
JB		 817 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
818
55de908a
JB		 819 if (sdata->local->use_chanctx) {
820 sdata_info(sdata,
821 "not handling channel switch with channel contexts\n");
822 ieee80211_queue_work(&sdata->local->hw,
823 &ifmgd->csa_connection_drop_work);
246dc3fd 824 return;
55de908a
JB		 825 }
826
827 mutex_lock(&sdata->local->chanctx_mtx);
828 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
829 mutex_unlock(&sdata->local->chanctx_mtx);
830 return;
831 }
832 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
833 struct ieee80211_chanctx, conf);
834 if (chanctx->refcount > 1) {
835 sdata_info(sdata,
836 "channel switch with multiple interfaces on the same channel, disconnecting\n");
837 ieee80211_queue_work(&sdata->local->hw,
838 &ifmgd->csa_connection_drop_work);
839 mutex_unlock(&sdata->local->chanctx_mtx);
840 return;
841 }
842 mutex_unlock(&sdata->local->chanctx_mtx);
843
844 sdata->local->csa_channel = new_ch;
845
57eebdf3
JB		 846 if (sw_elem->mode)
847 ieee80211_stop_queues_by_reason(&sdata->local->hw,
848 IEEE80211_QUEUE_STOP_REASON_CSA);
849
5ce6e438
JB		 850 if (sdata->local->ops->channel_switch) {
851 /* use driver's channel switch callback */
57eebdf3
JB		 852 struct ieee80211_channel_switch ch_switch = {
853 .timestamp = timestamp,
854 .block_tx = sw_elem->mode,
855 .channel = new_ch,
856 .count = sw_elem->count,
857 };
858
5ce6e438
JB		 859 drv_channel_switch(sdata->local, &ch_switch);
860 return;
861 }
862
863 /* channel switch handled in software */
57eebdf3 864 if (sw_elem->count <= 1)
42935eca 865 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 866 else
cc32abd4 867 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 868 TU_TO_EXP_TIME(sw_elem->count *
869 cbss->beacon_interval));
cc32abd4
JB		 870}
871
1ea6f9c0
JB		 872static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
873 struct ieee80211_channel *channel,
874 const u8 *country_ie, u8 country_ie_len,
875 const u8 *pwr_constr_elem)
cc32abd4 876{
04b7b2ff
JB		 877 struct ieee80211_country_ie_triplet *triplet;
878 int chan = ieee80211_frequency_to_channel(channel->center_freq);
879 int i, chan_pwr, chan_increment, new_ap_level;
880 bool have_chan_pwr = false;
cc32abd4 881
04b7b2ff
JB		 882 /* Invalid IE */
883 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 884 return 0;
cc32abd4 885
04b7b2ff
JB		 886 triplet = (void *)(country_ie + 3);
887 country_ie_len -= 3;
888
889 switch (channel->band) {
890 default:
891 WARN_ON_ONCE(1);
892 /* fall through */
893 case IEEE80211_BAND_2GHZ:
894 case IEEE80211_BAND_60GHZ:
895 chan_increment = 1;
896 break;
897 case IEEE80211_BAND_5GHZ:
898 chan_increment = 4;
899 break;
cc32abd4 900 }
04b7b2ff
JB		 901
902 /* find channel */
903 while (country_ie_len >= 3) {
904 u8 first_channel = triplet->chans.first_channel;
905
906 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
907 goto next;
908
909 for (i = 0; i < triplet->chans.num_channels; i++) {
910 if (first_channel + i * chan_increment == chan) {
911 have_chan_pwr = true;
912 chan_pwr = triplet->chans.max_power;
913 break;
914 }
915 }
916 if (have_chan_pwr)
917 break;
918
919 next:
920 triplet++;
921 country_ie_len -= 3;
922 }
923
924 if (!have_chan_pwr)
1ea6f9c0 925 return 0;
04b7b2ff
JB		 926
927 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
928
1ea6f9c0
JB		 929 if (sdata->ap_power_level == new_ap_level)
930 return 0;
04b7b2ff
JB		 931
932 sdata_info(sdata,
933 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
934 new_ap_level, chan_pwr, *pwr_constr_elem,
935 sdata->u.mgd.bssid);
1ea6f9c0
JB		 936 sdata->ap_power_level = new_ap_level;
937 if (__ieee80211_recalc_txpower(sdata))
938 return BSS_CHANGED_TXPOWER;
939 return 0;
cc32abd4
JB		 940}
941
965bedad
JB		 942/* powersave */
943static void ieee80211_enable_ps(struct ieee80211_local *local,
944 struct ieee80211_sub_if_data *sdata)
945{
946 struct ieee80211_conf *conf = &local->hw.conf;
947
d5edaedc
JB		 948 /*
949 * If we are scanning right now then the parameters will
950 * take effect when scan finishes.
951 */
fbe9c429 952 if (local->scanning)
d5edaedc
JB		 953 return;
954
965bedad
JB		 955 if (conf->dynamic_ps_timeout > 0 &&
956 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
957 mod_timer(&local->dynamic_ps_timer, jiffies +
958 msecs_to_jiffies(conf->dynamic_ps_timeout));
959 } else {
960 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
961 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 962
2a13052f
JO		 963 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
964 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
965 return;
966
967 conf->flags |= IEEE80211_CONF_PS;
968 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 969 }
970}
971
972static void ieee80211_change_ps(struct ieee80211_local *local)
973{
974 struct ieee80211_conf *conf = &local->hw.conf;
975
976 if (local->ps_sdata) {
965bedad
JB		 977 ieee80211_enable_ps(local, local->ps_sdata);
978 } else if (conf->flags & IEEE80211_CONF_PS) {
979 conf->flags &= ~IEEE80211_CONF_PS;
980 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
981 del_timer_sync(&local->dynamic_ps_timer);
982 cancel_work_sync(&local->dynamic_ps_enable_work);
983 }
984}
985
808118cb
JY		 986static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
987{
988 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
989 struct sta_info *sta = NULL;
c2c98fde 990 bool authorized = false;
808118cb
JY		 991
992 if (!mgd->powersave)
993 return false;
994
05cb9108
JB		 995 if (mgd->broken_ap)
996 return false;
997
808118cb
JY		 998 if (!mgd->associated)
999 return false;
1000
808118cb
JY		 1001 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1002 IEEE80211_STA_CONNECTION_POLL))
1003 return false;
1004
1005 rcu_read_lock();
1006 sta = sta_info_get(sdata, mgd->bssid);
1007 if (sta)
c2c98fde 1008 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1009 rcu_read_unlock();
1010
c2c98fde 1011 return authorized;
808118cb
JY		 1012}
1013
965bedad 1014/* need to hold RTNL or interface lock */
10f644a4 1015void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1016{
1017 struct ieee80211_sub_if_data *sdata, *found = NULL;
1018 int count = 0;
195e294d 1019 int timeout;
965bedad
JB		 1020
1021 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1022 local->ps_sdata = NULL;
1023 return;
1024 }
1025
1026 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1027 if (!ieee80211_sdata_running(sdata))
965bedad 1028 continue;
8c7914de
RM		 1029 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1030 /* If an AP vif is found, then disable PS
1031 * by setting the count to zero thereby setting
1032 * ps_sdata to NULL.
1033 */
1034 count = 0;
1035 break;
1036 }
965bedad
JB		 1037 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1038 continue;
1039 found = sdata;
1040 count++;
1041 }
1042
808118cb 1043 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1044 s32 beaconint_us;
1045
1046 if (latency < 0)
ed77134b 1047 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1048
1049 beaconint_us = ieee80211_tu_to_usec(
1050 found->vif.bss_conf.beacon_int);
1051
ff616381 1052 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1053 if (timeout < 0) {
1054 /*
ff616381
JO		 1055 * Go to full PSM if the user configures a very low
1056 * latency requirement.
0ab82b04
EP		 1057 * The 2000 second value is there for compatibility
1058 * until the PM_QOS_NETWORK_LATENCY is configured
1059 * with real values.
195e294d 1060 */
0ab82b04
EP		 1061 if (latency > (1900 * USEC_PER_MSEC) &&
1062 latency != (2000 * USEC_PER_SEC))
195e294d 1063 timeout = 0;
ff616381
JO		 1064 else
1065 timeout = 100;
195e294d 1066 }
09b85568 1067 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1068
04fe2037 1069 if (beaconint_us > latency) {
10f644a4 1070 local->ps_sdata = NULL;
04fe2037 1071 } else {
04fe2037 1072 int maxslp = 1;
826262c3 1073 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1074
1075 /* If the TIM IE is invalid, pretend the value is 1 */
1076 if (!dtimper)
1077 dtimper = 1;
1078 else if (dtimper > 1)
04fe2037
JB		 1079 maxslp = min_t(int, dtimper,
1080 latency / beaconint_us);
1081
9ccebe61 1082 local->hw.conf.max_sleep_period = maxslp;
56007a02 1083 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1084 local->ps_sdata = found;
04fe2037 1085 }
10f644a4 1086 } else {
965bedad 1087 local->ps_sdata = NULL;
10f644a4 1088 }
965bedad
JB		 1089
1090 ieee80211_change_ps(local);
1091}
1092
ab095877
EP		 1093void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1094{
1095 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1096
1097 if (sdata->vif.bss_conf.ps != ps_allowed) {
1098 sdata->vif.bss_conf.ps = ps_allowed;
1099 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1100 }
1101}
1102
965bedad
JB		 1103void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1104{
1105 struct ieee80211_local *local =
1106 container_of(work, struct ieee80211_local,
1107 dynamic_ps_disable_work);
1108
1109 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1110 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1111 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1112 }
1113
1114 ieee80211_wake_queues_by_reason(&local->hw,
1115 IEEE80211_QUEUE_STOP_REASON_PS);
1116}
1117
1118void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1119{
1120 struct ieee80211_local *local =
1121 container_of(work, struct ieee80211_local,
1122 dynamic_ps_enable_work);
1123 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1124 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1125 unsigned long flags;
1126 int q;
965bedad
JB		 1127
1128 /* can only happen when PS was just disabled anyway */
1129 if (!sdata)
1130 return;
1131
5e34069c
CL		 1132 ifmgd = &sdata->u.mgd;
1133
965bedad
JB		 1134 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1135 return;
1136
09b85568 1137 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1138 /* don't enter PS if TX frames are pending */
1139 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1140 mod_timer(&local->dynamic_ps_timer, jiffies +
1141 msecs_to_jiffies(
1142 local->hw.conf.dynamic_ps_timeout));
1143 return;
1144 }
77b7023a
AN		 1145
1146 /*
1147 * transmission can be stopped by others which leads to
1148 * dynamic_ps_timer expiry. Postpone the ps timer if it
1149 * is not the actual idle state.
1150 */
1151 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1152 for (q = 0; q < local->hw.queues; q++) {
1153 if (local->queue_stop_reasons[q]) {
1154 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1155 flags);
1156 mod_timer(&local->dynamic_ps_timer, jiffies +
1157 msecs_to_jiffies(
1158 local->hw.conf.dynamic_ps_timeout));
1159 return;
1160 }
1161 }
1162 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1163 }
1ddc2867 1164
375177bf 1165 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1166 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1167 netif_tx_stop_all_queues(sdata->dev);
965bedad 1168
e8306f98
VN		 1169 if (drv_tx_frames_pending(local))
1170 mod_timer(&local->dynamic_ps_timer, jiffies +
1171 msecs_to_jiffies(
1172 local->hw.conf.dynamic_ps_timeout));
1173 else {
1174 ieee80211_send_nullfunc(local, sdata, 1);
1175 /* Flush to get the tx status of nullfunc frame */
1176 drv_flush(local, false);
1177 }
f3e85b9e
VN		 1178 }
1179
2a13052f
JO		 1180 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1181 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1182 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1183 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1184 local->hw.conf.flags |= IEEE80211_CONF_PS;
1185 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1186 }
f3e85b9e 1187
77b7023a
AN		 1188 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1189 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1190}
1191
1192void ieee80211_dynamic_ps_timer(unsigned long data)
1193{
1194 struct ieee80211_local *local = (void *) data;
1195
78f1a8b7 1196 if (local->quiescing || local->suspended)
5bb644a0
JB		 1197 return;
1198
42935eca 1199 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1200}
1201
164eb02d
SW		 1202void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1203{
1204 struct delayed_work *delayed_work =
1205 container_of(work, struct delayed_work, work);
1206 struct ieee80211_sub_if_data *sdata =
1207 container_of(delayed_work, struct ieee80211_sub_if_data,
1208 dfs_cac_timer_work);
1209
1210 ieee80211_vif_release_channel(sdata);
1211
1212 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1213}
1214
60f8b39c 1215/* MLME */
7d25745d 1216static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1217 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1218 u8 *wmm_param, size_t wmm_param_len)
1219{
f0706e82 1220 struct ieee80211_tx_queue_params params;
4ced3f74 1221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1222 size_t left;
1223 int count;
ab13315a 1224 u8 *pos, uapsd_queues = 0;
f0706e82 1225
e1b3ec1a 1226 if (!local->ops->conf_tx)
7d25745d 1227 return false;
e1b3ec1a 1228
32c5057b 1229 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1230 return false;
3434fbd3
JB		 1231
1232 if (!wmm_param)
7d25745d 1233 return false;
3434fbd3 1234
f0706e82 1235 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1236 return false;
ab13315a
KV		 1237
1238 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1239 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1240
f0706e82 1241 count = wmm_param[6] & 0x0f;
46900298 1242 if (count == ifmgd->wmm_last_param_set)
7d25745d 1243 return false;
46900298 1244 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1245
1246 pos = wmm_param + 8;
1247 left = wmm_param_len - 8;
1248
1249 memset(&params, 0, sizeof(params));
1250
00e96dec 1251 sdata->wmm_acm = 0;
f0706e82
JB		 1252 for (; left >= 4; left -= 4, pos += 4) {
1253 int aci = (pos[0] >> 5) & 0x03;
1254 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1255 bool uapsd = false;
f0706e82
JB		 1256 int queue;
1257
1258 switch (aci) {
0eeb59fe 1259 case 1: /* AC_BK */
e100bb64 1260 queue = 3;
988c0f72 1261 if (acm)
00e96dec 1262 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1263 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1264 uapsd = true;
f0706e82 1265 break;
0eeb59fe 1266 case 2: /* AC_VI */
e100bb64 1267 queue = 1;
988c0f72 1268 if (acm)
00e96dec 1269 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1270 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1271 uapsd = true;
f0706e82 1272 break;
0eeb59fe 1273 case 3: /* AC_VO */
e100bb64 1274 queue = 0;
988c0f72 1275 if (acm)
00e96dec 1276 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1277 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1278 uapsd = true;
f0706e82 1279 break;
0eeb59fe 1280 case 0: /* AC_BE */
f0706e82 1281 default:
e100bb64 1282 queue = 2;
988c0f72 1283 if (acm)
00e96dec 1284 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1285 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1286 uapsd = true;
f0706e82
JB		 1287 break;
1288 }
1289
1290 params.aifs = pos[0] & 0x0f;
1291 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1292 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1293 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1294 params.uapsd = uapsd;
1295
bdcbd8e0
JB		 1296 mlme_dbg(sdata,
1297 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1298 queue, aci, acm,
1299 params.aifs, params.cw_min, params.cw_max,
1300 params.txop, params.uapsd);
f6f3def3
EP		 1301 sdata->tx_conf[queue] = params;
1302 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1303 sdata_err(sdata,
1304 "failed to set TX queue parameters for queue %d\n",
1305 queue);
f0706e82 1306 }
e1b3ec1a
SG		 1307
1308 /* enable WMM or activate new settings */
4ced3f74 1309 sdata->vif.bss_conf.qos = true;
7d25745d 1310 return true;
f0706e82
JB		 1311}
1312
925e64c3
SG		 1313static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1314{
1315 lockdep_assert_held(&sdata->local->mtx);
1316
1317 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1318 IEEE80211_STA_BEACON_POLL);
1319 ieee80211_run_deferred_scan(sdata->local);
1320}
1321
1322static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1323{
1324 mutex_lock(&sdata->local->mtx);
1325 __ieee80211_stop_poll(sdata);
1326 mutex_unlock(&sdata->local->mtx);
1327}
1328
7a5158ef
JB		 1329static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1330 u16 capab, bool erp_valid, u8 erp)
5628221c 1331{
bda3933a 1332 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1333 u32 changed = 0;
7a5158ef
JB		 1334 bool use_protection;
1335 bool use_short_preamble;
1336 bool use_short_slot;
1337
1338 if (erp_valid) {
1339 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1340 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1341 } else {
1342 use_protection = false;
1343 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1344 }
1345
1346 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1347 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1348 use_short_slot = true;
5628221c 1349
471b3efd 1350 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1351 bss_conf->use_cts_prot = use_protection;
1352 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1353 }
7e9ed188 1354
d43c7b37 1355 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1356 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1357 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1358 }
d9430a32 1359
7a5158ef 1360 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1361 bss_conf->use_short_slot = use_short_slot;
1362 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1363 }
1364
1365 return changed;
1366}
1367
f698d856 1368static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1369 struct cfg80211_bss *cbss,
ae5eb026 1370 u32 bss_info_changed)
f0706e82 1371{
0c1ad2ca 1372 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1373 struct ieee80211_local *local = sdata->local;
68542962 1374 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1375
ae5eb026 1376 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1377 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1378 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1379
7ccc8bd7
FF		 1380 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1381 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1382
0c1ad2ca
JB		 1383 sdata->u.mgd.associated = cbss;
1384 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1385
17e4ec14
JM		 1386 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1387
488dd7b5 1388 if (sdata->vif.p2p) {
9caf0364 1389 const struct cfg80211_bss_ies *ies;
488dd7b5 1390
9caf0364
JB		 1391 rcu_read_lock();
1392 ies = rcu_dereference(cbss->ies);
1393 if (ies) {
1394 u8 noa[2];
1395 int ret;
1396
1397 ret = cfg80211_get_p2p_attr(
1398 ies->data, ies->len,
1399 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1400 noa, sizeof(noa));
1401 if (ret >= 2) {
1402 bss_conf->p2p_oppps = noa[1] & 0x80;
1403 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1404 bss_info_changed |= BSS_CHANGED_P2P_PS;
1405 sdata->u.mgd.p2p_noa_index = noa[0];
1406 }
488dd7b5 1407 }
9caf0364 1408 rcu_read_unlock();
488dd7b5
JB		 1409 }
1410
b291ba11 1411 /* just to be sure */
925e64c3 1412 ieee80211_stop_poll(sdata);
b291ba11 1413
9ac19a90 1414 ieee80211_led_assoc(local, 1);
9306102e 1415
c65dd147 1416 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1417 /*
1418 * If the AP is buggy we may get here with no DTIM period
1419 * known, so assume it's 1 which is the only safe assumption
1420 * in that case, although if the TIM IE is broken powersave
1421 * probably just won't work at all.
1422 */
1423 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1424 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1425 } else {
e5b900d2 1426 bss_conf->dtim_period = 0;
826262c3 1427 }
e5b900d2 1428
68542962 1429 bss_conf->assoc = 1;
9cef8737 1430
a97c13c3 1431 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1432 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1433 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1434 bss_info_changed |= BSS_CHANGED_CQM;
1435
68542962 1436 /* Enable ARP filtering */
0f19b41e 1437 if (bss_conf->arp_addr_cnt)
68542962 1438 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1439
ae5eb026 1440 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1441
056508dc
JB		 1442 mutex_lock(&local->iflist_mtx);
1443 ieee80211_recalc_ps(local, -1);
1444 mutex_unlock(&local->iflist_mtx);
e0cb686f 1445
04ecd257 1446 ieee80211_recalc_smps(sdata);
ab095877
EP		 1447 ieee80211_recalc_ps_vif(sdata);
1448
8a5b33f5 1449 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1450 netif_carrier_on(sdata->dev);
f0706e82
JB		 1451}
1452
e69e95db 1453static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1454 u16 stype, u16 reason, bool tx,
1455 u8 *frame_buf)
aa458d17 1456{
46900298 1457 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1458 struct ieee80211_local *local = sdata->local;
3cc5240b 1459 u32 changed = 0;
aa458d17 1460
77fdaa12
JB		 1461 ASSERT_MGD_MTX(ifmgd);
1462
37ad3888
JB		 1463 if (WARN_ON_ONCE(tx && !frame_buf))
1464 return;
1465
b291ba11
JB		 1466 if (WARN_ON(!ifmgd->associated))
1467 return;
1468
79543d8e
DS		 1469 ieee80211_stop_poll(sdata);
1470
77fdaa12 1471 ifmgd->associated = NULL;
77fdaa12
JB		 1472
1473 /*
1474 * we need to commit the associated = NULL change because the
1475 * scan code uses that to determine whether this iface should
1476 * go to/wake up from powersave or not -- and could otherwise
1477 * wake the queues erroneously.
1478 */
1479 smp_mb();
1480
1481 /*
1482 * Thus, we can only afterwards stop the queues -- to account
1483 * for the case where another CPU is finishing a scan at this
1484 * time -- we don't want the scan code to enable queues.
1485 */
aa458d17 1486
8a5b33f5 1487 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1488 netif_carrier_off(sdata->dev);
1489
88bc40e8
EP		 1490 /*
1491 * if we want to get out of ps before disassoc (why?) we have
1492 * to do it before sending disassoc, as otherwise the null-packet
1493 * won't be valid.
1494 */
1495 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1496 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1497 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1498 }
1499 local->ps_sdata = NULL;
1500
ab095877
EP		 1501 /* disable per-vif ps */
1502 ieee80211_recalc_ps_vif(sdata);
1503
f823981e
EP		 1504 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1505 if (tx)
1506 drv_flush(local, false);
1507
37ad3888
JB		 1508 /* deauthenticate/disassociate now */
1509 if (tx || frame_buf)
88a9e31c
EP		 1510 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1511 reason, tx, frame_buf);
37ad3888
JB		 1512
1513 /* flush out frame */
1514 if (tx)
1515 drv_flush(local, false);
1516
88a9e31c
EP		 1517 /* clear bssid only after building the needed mgmt frames */
1518 memset(ifmgd->bssid, 0, ETH_ALEN);
1519
37ad3888 1520 /* remove AP and TDLS peers */
051007d9 1521 sta_info_flush_defer(sdata);
37ad3888
JB		 1522
1523 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1524 changed |= ieee80211_reset_erp_info(sdata);
1525
f5e5bf25 1526 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1527 changed |= BSS_CHANGED_ASSOC;
1528 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1529
488dd7b5
JB		 1530 sdata->vif.bss_conf.p2p_ctwindow = 0;
1531 sdata->vif.bss_conf.p2p_oppps = false;
1532
413ad50a 1533 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1534 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1535 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1536
1ea6f9c0 1537 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1538
520eb820
KV		 1539 del_timer_sync(&local->dynamic_ps_timer);
1540 cancel_work_sync(&local->dynamic_ps_enable_work);
1541
68542962 1542 /* Disable ARP filtering */
0f19b41e 1543 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1544 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1545
3abead59
JB		 1546 sdata->vif.bss_conf.qos = false;
1547 changed |= BSS_CHANGED_QOS;
1548
0aaffa9b
JB		 1549 /* The BSSID (not really interesting) and HT changed */
1550 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1551 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1552
3abead59
JB		 1553 /* disassociated - set to defaults now */
1554 ieee80211_set_wmm_default(sdata, false);
1555
b9dcf712
JB		 1556 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1557 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1558 del_timer_sync(&sdata->u.mgd.timer);
1559 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1560
1561 sdata->u.mgd.timers_running = 0;
028e8da0 1562
826262c3
JB		 1563 sdata->vif.bss_conf.dtim_period = 0;
1564
028e8da0
JB		 1565 ifmgd->flags = 0;
1566 ieee80211_vif_release_channel(sdata);
aa458d17 1567}
f0706e82 1568
3cf335d5
KV		 1569void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1570 struct ieee80211_hdr *hdr)
1571{
1572 /*
1573 * We can postpone the mgd.timer whenever receiving unicast frames
1574 * from AP because we know that the connection is working both ways
1575 * at that time. But multicast frames (and hence also beacons) must
1576 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1577 * data idle periods for sending the periodic probe request to the
1578 * AP we're connected to.
3cf335d5 1579 */
b291ba11
JB		 1580 if (is_multicast_ether_addr(hdr->addr1))
1581 return;
1582
be099e82 1583 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1584}
f0706e82 1585
4e5ff376
FF		 1586static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1587{
1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1589 struct ieee80211_local *local = sdata->local;
4e5ff376 1590
133d40f9 1591 mutex_lock(&local->mtx);
4e5ff376 1592 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1593 IEEE80211_STA_CONNECTION_POLL))) {
1594 mutex_unlock(&local->mtx);
1595 return;
1596 }
4e5ff376 1597
925e64c3 1598 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1599
1600 mutex_lock(&local->iflist_mtx);
1601 ieee80211_recalc_ps(local, -1);
1602 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1603
1604 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1605 goto out;
4e5ff376
FF		 1606
1607 /*
1608 * We've received a probe response, but are not sure whether
1609 * we have or will be receiving any beacons or data, so let's
1610 * schedule the timers again, just in case.
1611 */
1612 ieee80211_sta_reset_beacon_monitor(sdata);
1613
1614 mod_timer(&ifmgd->conn_mon_timer,
1615 round_jiffies_up(jiffies +
1616 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1617out:
133d40f9 1618 mutex_unlock(&local->mtx);
4e5ff376
FF		 1619}
1620
1621void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1622 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1623{
75706d0e 1624 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1625 return;
1626
4e5ff376
FF		 1627 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1628 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1629 if (ack)
cab1c7fd 1630 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1631 else
1632 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1633 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1634 return;
4e5ff376 1635 }
cab1c7fd
WD		 1636
1637 if (ack)
1638 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1639}
1640
a43abf29
ML		 1641static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1642{
1643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1644 const u8 *ssid;
f01a067d 1645 u8 *dst = ifmgd->associated->bssid;
180205bd 1646 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1647
1648 /*
1649 * Try sending broadcast probe requests for the last three
1650 * probe requests after the first ones failed since some
1651 * buggy APs only support broadcast probe requests.
1652 */
1653 if (ifmgd->probe_send_count >= unicast_limit)
1654 dst = NULL;
a43abf29 1655
4e5ff376
FF		 1656 /*
1657 * When the hardware reports an accurate Tx ACK status, it's
1658 * better to send a nullfunc frame instead of a probe request,
1659 * as it will kick us off the AP quickly if we aren't associated
1660 * anymore. The timeout will be reset if the frame is ACKed by
1661 * the AP.
1662 */
992e68bf
SD		 1663 ifmgd->probe_send_count++;
1664
04ac3c0e
FF		 1665 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1666 ifmgd->nullfunc_failed = false;
4e5ff376 1667 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1668 } else {
88c868c4
SG		 1669 int ssid_len;
1670
9caf0364 1671 rcu_read_lock();
4e5ff376 1672 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1673 if (WARN_ON_ONCE(ssid == NULL))
1674 ssid_len = 0;
1675 else
1676 ssid_len = ssid[1];
1677
1678 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1679 0, (u32) -1, true, 0,
55de908a 1680 ifmgd->associated->channel, false);
9caf0364 1681 rcu_read_unlock();
4e5ff376 1682 }
a43abf29 1683
180205bd 1684 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1685 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1686 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1687 drv_flush(sdata->local, false);
a43abf29
ML		 1688}
1689
b291ba11
JB		 1690static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1691 bool beacon)
04de8381 1692{
04de8381 1693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1694 bool already = false;
34bfc411 1695
9607e6b6 1696 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1697 return;
1698
77fdaa12
JB		 1699 mutex_lock(&ifmgd->mtx);
1700
1701 if (!ifmgd->associated)
1702 goto out;
1703
133d40f9
SG		 1704 mutex_lock(&sdata->local->mtx);
1705
1706 if (sdata->local->tmp_channel || sdata->local->scanning) {
1707 mutex_unlock(&sdata->local->mtx);
1708 goto out;
1709 }
1710
e87cc472 1711 if (beacon)
bdcbd8e0 1712 mlme_dbg_ratelimited(sdata,
112c31f0 1713 "detected beacon loss from AP - probing\n");
bdcbd8e0 1714
6efb71b0
HS		 1715 ieee80211_cqm_rssi_notify(&sdata->vif,
1716 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1717
b291ba11
JB		 1718 /*
1719 * The driver/our work has already reported this event or the
1720 * connection monitoring has kicked in and we have already sent
1721 * a probe request. Or maybe the AP died and the driver keeps
1722 * reporting until we disassociate...
1723 *
1724 * In either case we have to ignore the current call to this
1725 * function (except for setting the correct probe reason bit)
1726 * because otherwise we would reset the timer every time and
1727 * never check whether we received a probe response!
1728 */
1729 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1730 IEEE80211_STA_CONNECTION_POLL))
1731 already = true;
1732
1733 if (beacon)
1734 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1735 else
1736 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1737
133d40f9
SG		 1738 mutex_unlock(&sdata->local->mtx);
1739
b291ba11
JB		 1740 if (already)
1741 goto out;
1742
4e751843
JB		 1743 mutex_lock(&sdata->local->iflist_mtx);
1744 ieee80211_recalc_ps(sdata->local, -1);
1745 mutex_unlock(&sdata->local->iflist_mtx);
1746
a43abf29
ML		 1747 ifmgd->probe_send_count = 0;
1748 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1749 out:
1750 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1751}
1752
a619a4c0
JO		 1753struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1754 struct ieee80211_vif *vif)
1755{
1756 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1758 struct cfg80211_bss *cbss;
a619a4c0
JO		 1759 struct sk_buff *skb;
1760 const u8 *ssid;
88c868c4 1761 int ssid_len;
a619a4c0
JO		 1762
1763 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1764 return NULL;
1765
1766 ASSERT_MGD_MTX(ifmgd);
1767
d9b3b28b
EP		 1768 if (ifmgd->associated)
1769 cbss = ifmgd->associated;
1770 else if (ifmgd->auth_data)
1771 cbss = ifmgd->auth_data->bss;
1772 else if (ifmgd->assoc_data)
1773 cbss = ifmgd->assoc_data->bss;
1774 else
a619a4c0
JO		 1775 return NULL;
1776
9caf0364 1777 rcu_read_lock();
d9b3b28b 1778 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1779 if (WARN_ON_ONCE(ssid == NULL))
1780 ssid_len = 0;
1781 else
1782 ssid_len = ssid[1];
1783
d9b3b28b 1784 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1785 (u32) -1, cbss->channel,
6b77863b 1786 ssid + 2, ssid_len,
85a237fe 1787 NULL, 0, true);
9caf0364 1788 rcu_read_unlock();
a619a4c0
JO		 1789
1790 return skb;
1791}
1792EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1793
eef9e54c 1794static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 1795{
1796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 1797 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1798
1799 mutex_lock(&ifmgd->mtx);
1800 if (!ifmgd->associated) {
1801 mutex_unlock(&ifmgd->mtx);
1802 return;
1803 }
1804
37ad3888
JB		 1805 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1806 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 1807 true, frame_buf);
882a7c69 1808 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8
JB		 1809 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1810 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 1811 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1812
1e4dcd01
JO		 1813 /*
1814 * must be outside lock due to cfg80211,
1815 * but that's not a problem.
1816 */
6ae16775 1817 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 1818}
1819
cc74c0c7 1820static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1821{
1822 struct ieee80211_sub_if_data *sdata =
1823 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1824 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1826 struct sta_info *sta;
1827
1828 if (ifmgd->associated) {
30fa9047 1829 rcu_read_lock();
a85e1d55
PS		 1830 sta = sta_info_get(sdata, ifmgd->bssid);
1831 if (sta)
1832 sta->beacon_loss_count++;
30fa9047 1833 rcu_read_unlock();
a85e1d55 1834 }
b291ba11 1835
682bd38b 1836 if (ifmgd->connection_loss) {
882a7c69
JB		 1837 sdata_info(sdata, "Connection to AP %pM lost\n",
1838 ifmgd->bssid);
eef9e54c 1839 __ieee80211_disconnect(sdata);
882a7c69 1840 } else {
1e4dcd01 1841 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1842 }
1843}
1844
1845static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1846{
1847 struct ieee80211_sub_if_data *sdata =
1848 container_of(work, struct ieee80211_sub_if_data,
1849 u.mgd.csa_connection_drop_work);
1850
eef9e54c 1851 __ieee80211_disconnect(sdata);
b291ba11
JB		 1852}
1853
04de8381
KV		 1854void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1855{
1856 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1857 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1858
b5878a2d
JB		 1859 trace_api_beacon_loss(sdata);
1860
1e4dcd01 1861 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 1862 sdata->u.mgd.connection_loss = false;
1e4dcd01 1863 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1864}
1865EXPORT_SYMBOL(ieee80211_beacon_loss);
1866
1e4dcd01
JO		 1867void ieee80211_connection_loss(struct ieee80211_vif *vif)
1868{
1869 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1870 struct ieee80211_hw *hw = &sdata->local->hw;
1871
b5878a2d
JB		 1872 trace_api_connection_loss(sdata);
1873
682bd38b 1874 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 1875 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1876}
1877EXPORT_SYMBOL(ieee80211_connection_loss);
1878
1879
66e67e41
JB		 1880static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1881 bool assoc)
1882{
1883 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1884
1885 lockdep_assert_held(&sdata->u.mgd.mtx);
1886
66e67e41
JB		 1887 if (!assoc) {
1888 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1889
1890 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1891 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 1892 sdata->u.mgd.flags = 0;
55de908a 1893 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1894 }
1895
5b112d3d 1896 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 1897 kfree(auth_data);
1898 sdata->u.mgd.auth_data = NULL;
1899}
1900
1901static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1902 struct ieee80211_mgmt *mgmt, size_t len)
1903{
1672c0e3 1904 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 1905 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1906 u8 *pos;
1907 struct ieee802_11_elems elems;
1672c0e3 1908 u32 tx_flags = 0;
66e67e41
JB		 1909
1910 pos = mgmt->u.auth.variable;
1911 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1912 if (!elems.challenge)
1913 return;
1914 auth_data->expected_transaction = 4;
a1845fc7 1915 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 1916 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1917 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
1918 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 1919 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1920 elems.challenge - 2, elems.challenge_len + 2,
1921 auth_data->bss->bssid, auth_data->bss->bssid,
1922 auth_data->key, auth_data->key_len,
1672c0e3 1923 auth_data->key_idx, tx_flags);
66e67e41
JB		 1924}
1925
1926static enum rx_mgmt_action __must_check
1927ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1928 struct ieee80211_mgmt *mgmt, size_t len)
1929{
1930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1931 u8 bssid[ETH_ALEN];
1932 u16 auth_alg, auth_transaction, status_code;
1933 struct sta_info *sta;
1934
1935 lockdep_assert_held(&ifmgd->mtx);
1936
1937 if (len < 24 + 6)
1938 return RX_MGMT_NONE;
1939
1940 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1941 return RX_MGMT_NONE;
1942
1943 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1944
b203ca39 1945 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1946 return RX_MGMT_NONE;
1947
1948 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1949 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1950 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1951
1952 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1953 auth_transaction != ifmgd->auth_data->expected_transaction) {
1954 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1955 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1956 auth_transaction,
1957 ifmgd->auth_data->expected_transaction);
66e67e41 1958 return RX_MGMT_NONE;
0f4126e8 1959 }
66e67e41
JB		 1960
1961 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1962 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1963 mgmt->sa, status_code);
dac211ec
EP		 1964 ieee80211_destroy_auth_data(sdata, false);
1965 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1966 }
1967
1968 switch (ifmgd->auth_data->algorithm) {
1969 case WLAN_AUTH_OPEN:
1970 case WLAN_AUTH_LEAP:
1971 case WLAN_AUTH_FT:
6b8ece3a 1972 case WLAN_AUTH_SAE:
66e67e41
JB		 1973 break;
1974 case WLAN_AUTH_SHARED_KEY:
1975 if (ifmgd->auth_data->expected_transaction != 4) {
1976 ieee80211_auth_challenge(sdata, mgmt, len);
1977 /* need another frame */
1978 return RX_MGMT_NONE;
1979 }
1980 break;
1981 default:
1982 WARN_ONCE(1, "invalid auth alg %d",
1983 ifmgd->auth_data->algorithm);
1984 return RX_MGMT_NONE;
1985 }
1986
bdcbd8e0 1987 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1988 ifmgd->auth_data->done = true;
1989 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 1990 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 1991 run_again(ifmgd, ifmgd->auth_data->timeout);
1992
6b8ece3a
JM		 1993 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
1994 ifmgd->auth_data->expected_transaction != 2) {
1995 /*
1996 * Report auth frame to user space for processing since another
1997 * round of Authentication frames is still needed.
1998 */
1999 return RX_MGMT_CFG80211_RX_AUTH;
2000 }
2001
66e67e41
JB		 2002 /* move station state to auth */
2003 mutex_lock(&sdata->local->sta_mtx);
2004 sta = sta_info_get(sdata, bssid);
2005 if (!sta) {
2006 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2007 goto out_err;
2008 }
2009 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2010 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2011 goto out_err;
2012 }
2013 mutex_unlock(&sdata->local->sta_mtx);
2014
2015 return RX_MGMT_CFG80211_RX_AUTH;
2016 out_err:
2017 mutex_unlock(&sdata->local->sta_mtx);
2018 /* ignore frame -- wait for timeout */
2019 return RX_MGMT_NONE;
2020}
2021
2022
77fdaa12
JB		 2023static enum rx_mgmt_action __must_check
2024ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2025 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2026{
46900298 2027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2028 const u8 *bssid = NULL;
f0706e82
JB		 2029 u16 reason_code;
2030
66e67e41
JB		 2031 lockdep_assert_held(&ifmgd->mtx);
2032
f4ea83dd 2033 if (len < 24 + 2)
77fdaa12 2034 return RX_MGMT_NONE;
f0706e82 2035
66e67e41 2036 if (!ifmgd->associated ||
b203ca39 2037 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2038 return RX_MGMT_NONE;
77fdaa12 2039
0c1ad2ca 2040 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2041
2042 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2043
bdcbd8e0
JB		 2044 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2045 bssid, reason_code);
77fdaa12 2046
37ad3888
JB		 2047 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2048
77fdaa12 2049 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2050}
2051
2052
77fdaa12
JB		 2053static enum rx_mgmt_action __must_check
2054ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2055 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2056{
46900298 2057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2058 u16 reason_code;
2059
66e67e41 2060 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2061
66e67e41 2062 if (len < 24 + 2)
77fdaa12
JB		 2063 return RX_MGMT_NONE;
2064
66e67e41 2065 if (!ifmgd->associated ||
b203ca39 2066 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2067 return RX_MGMT_NONE;
f0706e82
JB		 2068
2069 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2070
bdcbd8e0
JB		 2071 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2072 mgmt->sa, reason_code);
f0706e82 2073
37ad3888
JB		 2074 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2075
77fdaa12 2076 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2077}
2078
c74d084f
CL		 2079static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2080 u8 *supp_rates, unsigned int supp_rates_len,
2081 u32 *rates, u32 *basic_rates,
2082 bool *have_higher_than_11mbit,
2083 int *min_rate, int *min_rate_index)
2084{
2085 int i, j;
2086
2087 for (i = 0; i < supp_rates_len; i++) {
2088 int rate = (supp_rates[i] & 0x7f) * 5;
2089 bool is_basic = !!(supp_rates[i] & 0x80);
2090
2091 if (rate > 110)
2092 *have_higher_than_11mbit = true;
2093
2094 /*
2095 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2096 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2097 *
2098 * Note: Even through the membership selector and the basic
2099 * rate flag share the same bit, they are not exactly
2100 * the same.
2101 */
2102 if (!!(supp_rates[i] & 0x80) &&
2103 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2104 continue;
2105
2106 for (j = 0; j < sband->n_bitrates; j++) {
2107 if (sband->bitrates[j].bitrate == rate) {
2108 *rates |= BIT(j);
2109 if (is_basic)
2110 *basic_rates |= BIT(j);
2111 if (rate < *min_rate) {
2112 *min_rate = rate;
2113 *min_rate_index = j;
2114 }
2115 break;
2116 }
2117 }
2118 }
2119}
f0706e82 2120
66e67e41
JB		 2121static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2122 bool assoc)
2123{
2124 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2125
2126 lockdep_assert_held(&sdata->u.mgd.mtx);
2127
66e67e41
JB		 2128 if (!assoc) {
2129 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2130
2131 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2132 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2133 sdata->u.mgd.flags = 0;
55de908a 2134 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2135 }
2136
2137 kfree(assoc_data);
2138 sdata->u.mgd.assoc_data = NULL;
2139}
2140
2141static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2142 struct cfg80211_bss *cbss,
af6b6374 2143 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2144{
46900298 2145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2146 struct ieee80211_local *local = sdata->local;
8318d78a 2147 struct ieee80211_supported_band *sband;
f0706e82 2148 struct sta_info *sta;
af6b6374 2149 u8 *pos;
af6b6374 2150 u16 capab_info, aid;
f0706e82 2151 struct ieee802_11_elems elems;
bda3933a 2152 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2153 u32 changed = 0;
c74d084f 2154 int err;
f0706e82 2155
af6b6374 2156 /* AssocResp and ReassocResp have identical structure */
f0706e82 2157
f0706e82 2158 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2159 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2160
1dd84aa2 2161 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2162 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2163 aid);
1dd84aa2
JB		 2164 aid &= ~(BIT(15) | BIT(14));
2165
05cb9108
JB		 2166 ifmgd->broken_ap = false;
2167
2168 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2169 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2170 aid);
05cb9108
JB		 2171 aid = 0;
2172 ifmgd->broken_ap = true;
2173 }
2174
af6b6374
JB		 2175 pos = mgmt->u.assoc_resp.variable;
2176 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2177
f0706e82 2178 if (!elems.supp_rates) {
bdcbd8e0 2179 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2180 return false;
f0706e82
JB		 2181 }
2182
46900298 2183 ifmgd->aid = aid;
f0706e82 2184
2a33bee2
GE		 2185 mutex_lock(&sdata->local->sta_mtx);
2186 /*
2187 * station info was already allocated and inserted before
2188 * the association and should be available to us
2189 */
7852e361 2190 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2191 if (WARN_ON(!sta)) {
2192 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2193 return false;
77fdaa12 2194 }
05e5e883 2195
55de908a 2196 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2197
a8243b72 2198 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2199 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2200 elems.ht_cap_elem, sta);
64f68e5d 2201
818255ea
MP		 2202 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2203 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2204 elems.vht_cap_elem, sta);
818255ea 2205
1128958d
JB		 2206 if (elems.ht_operation && elems.wmm_param &&
2207 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2208 changed |= ieee80211_config_ht_tx(sdata, sta,
2209 elems.ht_operation,
2210 cbss->bssid, false);
2211
bee7f586
JB		 2212 /*
2213 * If an operating mode notification IE is present, override the
2214 * NSS calculation (that would be done in rate_control_rate_init())
2215 * and use the # of streams from that element.
2216 */
2217 if (elems.opmode_notif &&
2218 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2219 u8 nss;
2220
2221 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2222 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2223 nss += 1;
2224 sta->sta.rx_nss = nss;
2225 }
2226
4b7679a5 2227 rate_control_rate_init(sta);
f0706e82 2228
46900298 2229 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2230 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2231
ddf4ac53 2232 if (elems.wmm_param)
c2c98fde 2233 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2234
3e4d40fa 2235 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2236 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2237 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2238 if (err) {
bdcbd8e0
JB		 2239 sdata_info(sdata,
2240 "failed to move station %pM to desired state\n",
2241 sta->sta.addr);
c8987876
JB		 2242 WARN_ON(__sta_info_destroy(sta));
2243 mutex_unlock(&sdata->local->sta_mtx);
2244 return false;
2245 }
2246
7852e361 2247 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2248
f2176d72
JO		 2249 /*
2250 * Always handle WMM once after association regardless
2251 * of the first value the AP uses. Setting -1 here has
2252 * that effect because the AP values is an unsigned
2253 * 4-bit value.
2254 */
2255 ifmgd->wmm_last_param_set = -1;
2256
ddf4ac53 2257 if (elems.wmm_param)
4ced3f74 2258 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2259 elems.wmm_param_len);
aa837e1d 2260 else
3abead59
JB		 2261 ieee80211_set_wmm_default(sdata, false);
2262 changed |= BSS_CHANGED_QOS;
f0706e82 2263
60f8b39c
JB		 2264 /* set AID and assoc capability,
2265 * ieee80211_set_associated() will tell the driver */
2266 bss_conf->aid = aid;
2267 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2268 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2269
d524215f
FF		 2270 /*
2271 * If we're using 4-addr mode, let the AP know that we're
2272 * doing so, so that it can create the STA VLAN on its side
2273 */
2274 if (ifmgd->use_4addr)
2275 ieee80211_send_4addr_nullfunc(local, sdata);
2276
15b7b062 2277 /*
b291ba11
JB		 2278 * Start timer to probe the connection to the AP now.
2279 * Also start the timer that will detect beacon loss.
15b7b062 2280 */
b291ba11 2281 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2282 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2283
af6b6374 2284 return true;
f0706e82
JB		 2285}
2286
66e67e41
JB		 2287static enum rx_mgmt_action __must_check
2288ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2289 struct ieee80211_mgmt *mgmt, size_t len,
2290 struct cfg80211_bss **bss)
2291{
2292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2293 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2294 u16 capab_info, status_code, aid;
2295 struct ieee802_11_elems elems;
2296 u8 *pos;
2297 bool reassoc;
2298
2299 lockdep_assert_held(&ifmgd->mtx);
2300
2301 if (!assoc_data)
2302 return RX_MGMT_NONE;
b203ca39 2303 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2304 return RX_MGMT_NONE;
2305
2306 /*
2307 * AssocResp and ReassocResp have identical structure, so process both
2308 * of them in this function.
2309 */
2310
2311 if (len < 24 + 6)
2312 return RX_MGMT_NONE;
2313
2314 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2315 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2316 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2317 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2318
bdcbd8e0
JB		 2319 sdata_info(sdata,
2320 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2321 reassoc ? "Rea" : "A", mgmt->sa,
2322 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2323
2324 pos = mgmt->u.assoc_resp.variable;
2325 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2326
2327 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2328 elems.timeout_int && elems.timeout_int_len == 5 &&
2329 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2330 u32 tu, ms;
2331 tu = get_unaligned_le32(elems.timeout_int + 1);
2332 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2333 sdata_info(sdata,
2334 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2335 mgmt->sa, tu, ms);
66e67e41 2336 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2337 assoc_data->timeout_started = true;
66e67e41
JB		 2338 if (ms > IEEE80211_ASSOC_TIMEOUT)
2339 run_again(ifmgd, assoc_data->timeout);
2340 return RX_MGMT_NONE;
2341 }
2342
2343 *bss = assoc_data->bss;
2344
2345 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2346 sdata_info(sdata, "%pM denied association (code=%d)\n",
2347 mgmt->sa, status_code);
66e67e41
JB		 2348 ieee80211_destroy_assoc_data(sdata, false);
2349 } else {
66e67e41
JB		 2350 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2351 /* oops -- internal error -- send timeout for now */
10a9109f 2352 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2353 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2354 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2355 }
635d999f 2356 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2357
2358 /*
2359 * destroy assoc_data afterwards, as otherwise an idle
2360 * recalc after assoc_data is NULL but before associated
2361 * is set can cause the interface to go idle
2362 */
2363 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2364 }
2365
2366 return RX_MGMT_CFG80211_RX_ASSOC;
2367}
8e3c1b77 2368
98c8fccf 2369static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2370 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2371 struct ieee80211_rx_status *rx_status,
d45c4172 2372 struct ieee802_11_elems *elems)
98c8fccf
JB		 2373{
2374 struct ieee80211_local *local = sdata->local;
2375 int freq;
c2b13452 2376 struct ieee80211_bss *bss;
98c8fccf 2377 struct ieee80211_channel *channel;
56007a02
JB		 2378 bool need_ps = false;
2379
826262c3
JB		 2380 if ((sdata->u.mgd.associated &&
2381 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2382 (sdata->u.mgd.assoc_data &&
2383 ether_addr_equal(mgmt->bssid,
2384 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2385 /* not previously set so we may need to recalc */
826262c3
JB		 2386 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2387
2388 if (elems->tim && !elems->parse_error) {
2389 struct ieee80211_tim_ie *tim_ie = elems->tim;
2390 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2391 }
56007a02 2392 }
98c8fccf
JB		 2393
2394 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2395 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2396 rx_status->band);
98c8fccf
JB		 2397 else
2398 freq = rx_status->freq;
2399
2400 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2401
2402 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2403 return;
2404
98c8fccf 2405 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2406 channel);
77fdaa12
JB		 2407 if (bss)
2408 ieee80211_rx_bss_put(local, bss);
2409
2410 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2411 return;
2412
56007a02
JB		 2413 if (need_ps) {
2414 mutex_lock(&local->iflist_mtx);
2415 ieee80211_recalc_ps(local, -1);
2416 mutex_unlock(&local->iflist_mtx);
2417 }
2418
5bc1420b
JB		 2419 if (elems->ch_switch_ie &&
2420 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2421 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2422 bss, rx_status->mactime);
f0706e82
JB		 2423}
2424
2425
f698d856 2426static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2427 struct sk_buff *skb)
f0706e82 2428{
af6b6374 2429 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2430 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2431 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2432 size_t baselen, len = skb->len;
ae6a44e3
EK		 2433 struct ieee802_11_elems elems;
2434
15b7b062
KV		 2435 ifmgd = &sdata->u.mgd;
2436
77fdaa12
JB		 2437 ASSERT_MGD_MTX(ifmgd);
2438
b203ca39 2439 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2440 return; /* ignore ProbeResp to foreign address */
2441
ae6a44e3
EK		 2442 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2443 if (baselen > len)
2444 return;
2445
2446 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2447 &elems);
2448
d45c4172 2449 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2450
77fdaa12 2451 if (ifmgd->associated &&
b203ca39 2452 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2453 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2454
2455 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2456 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2457 /* got probe response, continue with auth */
bdcbd8e0 2458 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2459 ifmgd->auth_data->tries = 0;
2460 ifmgd->auth_data->timeout = jiffies;
89afe614 2461 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2462 run_again(ifmgd, ifmgd->auth_data->timeout);
2463 }
f0706e82
JB		 2464}
2465
d91f36db
JB		 2466/*
2467 * This is the canonical list of information elements we care about,
2468 * the filter code also gives us all changes to the Microsoft OUI
2469 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2470 *
2471 * We implement beacon filtering in software since that means we can
2472 * avoid processing the frame here and in cfg80211, and userspace
2473 * will not be able to tell whether the hardware supports it or not.
2474 *
2475 * XXX: This list needs to be dynamic -- userspace needs to be able to
2476 * add items it requires. It also needs to be able to tell us to
2477 * look out for other vendor IEs.
2478 */
2479static const u64 care_about_ies =
1d4df3a5
JB		 2480 (1ULL << WLAN_EID_COUNTRY) |
2481 (1ULL << WLAN_EID_ERP_INFO) |
2482 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2483 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2484 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2485 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2486
f698d856 2487static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2488 struct ieee80211_mgmt *mgmt,
2489 size_t len,
2490 struct ieee80211_rx_status *rx_status)
2491{
d91f36db 2492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2493 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2494 size_t baselen;
2495 struct ieee802_11_elems elems;
f698d856 2496 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2497 struct ieee80211_chanctx_conf *chanctx_conf;
2498 struct ieee80211_channel *chan;
bee7f586 2499 struct sta_info *sta;
471b3efd 2500 u32 changed = 0;
f87ad637 2501 bool erp_valid;
7a5158ef 2502 u8 erp_value = 0;
d91f36db 2503 u32 ncrc;
77fdaa12
JB		 2504 u8 *bssid;
2505
66e67e41 2506 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2507
ae6a44e3
EK		 2508 /* Process beacon from the current BSS */
2509 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2510 if (baselen > len)
2511 return;
2512
55de908a
JB		 2513 rcu_read_lock();
2514 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2515 if (!chanctx_conf) {
2516 rcu_read_unlock();
f0706e82 2517 return;
55de908a
JB		 2518 }
2519
4bf88530 2520 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a
JB		 2521 rcu_read_unlock();
2522 return;
2523 }
4bf88530 2524 chan = chanctx_conf->def.chan;
55de908a 2525 rcu_read_unlock();
f0706e82 2526
c65dd147 2527 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2528 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2529 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2530 len - baselen, &elems);
77fdaa12 2531
d45c4172 2532 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2533 ifmgd->assoc_data->have_beacon = true;
c65dd147 2534 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2535 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2536 sdata->vif.bss_conf.sync_tsf =
2537 le64_to_cpu(mgmt->u.beacon.timestamp);
2538 sdata->vif.bss_conf.sync_device_ts =
2539 rx_status->device_timestamp;
2540 if (elems.tim)
2541 sdata->vif.bss_conf.sync_dtim_count =
2542 elems.tim->dtim_count;
2543 else
2544 sdata->vif.bss_conf.sync_dtim_count = 0;
2545 }
66e67e41
JB		 2546 /* continue assoc process */
2547 ifmgd->assoc_data->timeout = jiffies;
89afe614 2548 ifmgd->assoc_data->timeout_started = true;
66e67e41
JB		 2549 run_again(ifmgd, ifmgd->assoc_data->timeout);
2550 return;
2551 }
77fdaa12 2552
66e67e41 2553 if (!ifmgd->associated ||
b203ca39 2554 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2555 return;
66e67e41 2556 bssid = ifmgd->associated->bssid;
f0706e82 2557
17e4ec14
JM		 2558 /* Track average RSSI from the Beacon frames of the current AP */
2559 ifmgd->last_beacon_signal = rx_status->signal;
2560 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2561 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2562 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2563 ifmgd->last_cqm_event_signal = 0;
391a200a 2564 ifmgd->count_beacon_signal = 1;
615f7b9b 2565 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2566 } else {
2567 ifmgd->ave_beacon_signal =
2568 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2569 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2570 ifmgd->ave_beacon_signal) / 16;
391a200a 2571 ifmgd->count_beacon_signal++;
17e4ec14 2572 }
615f7b9b
MV		 2573
2574 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2575 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2576 int sig = ifmgd->ave_beacon_signal;
2577 int last_sig = ifmgd->last_ave_beacon_signal;
2578
2579 /*
2580 * if signal crosses either of the boundaries, invoke callback
2581 * with appropriate parameters
2582 */
2583 if (sig > ifmgd->rssi_max_thold &&
2584 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2585 ifmgd->last_ave_beacon_signal = sig;
887da917 2586 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2587 } else if (sig < ifmgd->rssi_min_thold &&
2588 (last_sig >= ifmgd->rssi_max_thold ||
2589 last_sig == 0)) {
2590 ifmgd->last_ave_beacon_signal = sig;
887da917 2591 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2592 }
2593 }
2594
17e4ec14 2595 if (bss_conf->cqm_rssi_thold &&
391a200a 2596 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2597 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2598 int sig = ifmgd->ave_beacon_signal / 16;
2599 int last_event = ifmgd->last_cqm_event_signal;
2600 int thold = bss_conf->cqm_rssi_thold;
2601 int hyst = bss_conf->cqm_rssi_hyst;
2602 if (sig < thold &&
2603 (last_event == 0 || sig < last_event - hyst)) {
2604 ifmgd->last_cqm_event_signal = sig;
2605 ieee80211_cqm_rssi_notify(
2606 &sdata->vif,
2607 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2608 GFP_KERNEL);
2609 } else if (sig > thold &&
2610 (last_event == 0 || sig > last_event + hyst)) {
2611 ifmgd->last_cqm_event_signal = sig;
2612 ieee80211_cqm_rssi_notify(
2613 &sdata->vif,
2614 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2615 GFP_KERNEL);
2616 }
2617 }
2618
b291ba11 2619 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2620 mlme_dbg_ratelimited(sdata,
112c31f0 2621 "cancelling AP probe due to a received beacon\n");
925e64c3 2622 mutex_lock(&local->mtx);
b291ba11 2623 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2624 ieee80211_run_deferred_scan(local);
2625 mutex_unlock(&local->mtx);
2626
4e751843
JB		 2627 mutex_lock(&local->iflist_mtx);
2628 ieee80211_recalc_ps(local, -1);
2629 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2630 }
2631
b291ba11
JB		 2632 /*
2633 * Push the beacon loss detection into the future since
2634 * we are processing a beacon from the AP just now.
2635 */
d3a910a8 2636 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2637
d91f36db
JB		 2638 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2639 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2640 len - baselen, &elems,
2641 care_about_ies, ncrc);
2642
25c9c875 2643 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2644 bool directed_tim = ieee80211_check_tim(elems.tim,
2645 elems.tim_len,
2646 ifmgd->aid);
1fb3606b 2647 if (directed_tim) {
572e0012 2648 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2649 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2650 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2651 ieee80211_hw_config(local,
2652 IEEE80211_CONF_CHANGE_PS);
2653 }
572e0012 2654 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2655 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2656 local->pspolling = true;
2657
2658 /*
2659 * Here is assumed that the driver will be
2660 * able to send ps-poll frame and receive a
2661 * response even though power save mode is
2662 * enabled, but some drivers might require
2663 * to disable power save here. This needs
2664 * to be investigated.
2665 */
2666 ieee80211_send_pspoll(local, sdata);
2667 }
a97b77b9
VN		 2668 }
2669 }
7a5158ef 2670
488dd7b5
JB		 2671 if (sdata->vif.p2p) {
2672 u8 noa[2];
2673 int ret;
2674
2675 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2676 len - baselen,
2677 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2678 noa, sizeof(noa));
2679 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2680 bss_conf->p2p_oppps = noa[1] & 0x80;
2681 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2682 changed |= BSS_CHANGED_P2P_PS;
2683 sdata->u.mgd.p2p_noa_index = noa[0];
2684 /*
2685 * make sure we update all information, the CRC
2686 * mechanism doesn't look at P2P attributes.
2687 */
2688 ifmgd->beacon_crc_valid = false;
2689 }
2690 }
2691
d8ec4433 2692 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2693 return;
2694 ifmgd->beacon_crc = ncrc;
d8ec4433 2695 ifmgd->beacon_crc_valid = true;
30196673 2696
d45c4172 2697 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2698
2699 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2700 elems.wmm_param_len))
2701 changed |= BSS_CHANGED_QOS;
2702
c65dd147
EG		 2703 /*
2704 * If we haven't had a beacon before, tell the driver about the
ef429dad 2705 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 2706 */
2707 if (!bss_conf->dtim_period) {
2708 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2709 if (elems.tim)
2710 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2711 else
2712 bss_conf->dtim_period = 1;
ef429dad
JB		 2713
2714 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2715 sdata->vif.bss_conf.sync_tsf =
2716 le64_to_cpu(mgmt->u.beacon.timestamp);
2717 sdata->vif.bss_conf.sync_device_ts =
2718 rx_status->device_timestamp;
2719 if (elems.tim)
2720 sdata->vif.bss_conf.sync_dtim_count =
2721 elems.tim->dtim_count;
2722 else
2723 sdata->vif.bss_conf.sync_dtim_count = 0;
2724 }
2725
c65dd147
EG		 2726 changed |= BSS_CHANGED_DTIM_PERIOD;
2727 }
2728
7a5158ef
JB		 2729 if (elems.erp_info && elems.erp_info_len >= 1) {
2730 erp_valid = true;
2731 erp_value = elems.erp_info[0];
2732 } else {
2733 erp_valid = false;
50c4afb9 2734 }
7a5158ef
JB		 2735 changed |= ieee80211_handle_bss_capability(sdata,
2736 le16_to_cpu(mgmt->u.beacon.capab_info),
2737 erp_valid, erp_value);
f0706e82 2738
1128958d 2739 mutex_lock(&local->sta_mtx);
bee7f586
JB		 2740 sta = sta_info_get(sdata, bssid);
2741
074d46d1 2742 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2743 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
bee7f586 2744 changed |= ieee80211_config_ht_tx(sdata, sta,
1128958d 2745 elems.ht_operation,
24398e39 2746 bssid, true);
bee7f586
JB		 2747
2748 if (sta && elems.opmode_notif)
2749 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
2750 rx_status->band, true);
1128958d 2751 mutex_unlock(&local->sta_mtx);
d3c990fb 2752
04b7b2ff
JB		 2753 if (elems.country_elem && elems.pwr_constr_elem &&
2754 mgmt->u.probe_resp.capab_info &
2755 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2756 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2757 elems.country_elem,
2758 elems.country_elem_len,
2759 elems.pwr_constr_elem);
3f2355cb 2760
471b3efd 2761 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2762}
2763
1fa57d01
JB		 2764void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2765 struct sk_buff *skb)
f0706e82 2766{
77fdaa12 2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2768 struct ieee80211_rx_status *rx_status;
f0706e82 2769 struct ieee80211_mgmt *mgmt;
66e67e41 2770 struct cfg80211_bss *bss = NULL;
77fdaa12 2771 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2772 u16 fc;
2773
f0706e82
JB		 2774 rx_status = (struct ieee80211_rx_status *) skb->cb;
2775 mgmt = (struct ieee80211_mgmt *) skb->data;
2776 fc = le16_to_cpu(mgmt->frame_control);
2777
77fdaa12
JB		 2778 mutex_lock(&ifmgd->mtx);
2779
66e67e41
JB		 2780 switch (fc & IEEE80211_FCTL_STYPE) {
2781 case IEEE80211_STYPE_BEACON:
2782 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2783 break;
2784 case IEEE80211_STYPE_PROBE_RESP:
2785 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2786 break;
2787 case IEEE80211_STYPE_AUTH:
2788 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2789 break;
2790 case IEEE80211_STYPE_DEAUTH:
2791 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2792 break;
2793 case IEEE80211_STYPE_DISASSOC:
2794 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2795 break;
2796 case IEEE80211_STYPE_ASSOC_RESP:
2797 case IEEE80211_STYPE_REASSOC_RESP:
2798 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2799 break;
2800 case IEEE80211_STYPE_ACTION:
2801 switch (mgmt->u.action.category) {
2802 case WLAN_CATEGORY_SPECTRUM_MGMT:
2803 ieee80211_sta_process_chanswitch(sdata,
2804 &mgmt->u.action.u.chan_switch.sw_elem,
2805 (void *)ifmgd->associated->priv,
2806 rx_status->mactime);
77fdaa12 2807 break;
77fdaa12 2808 }
77fdaa12 2809 }
77fdaa12
JB		 2810 mutex_unlock(&ifmgd->mtx);
2811
66e67e41
JB		 2812 switch (rma) {
2813 case RX_MGMT_NONE:
2814 /* no action */
2815 break;
2816 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2817 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2818 break;
2819 case RX_MGMT_CFG80211_DISASSOC:
2820 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2821 break;
2822 case RX_MGMT_CFG80211_RX_AUTH:
2823 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2824 break;
2825 case RX_MGMT_CFG80211_RX_ASSOC:
2826 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2827 break;
2828 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2829 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2830 break;
2831 default:
2832 WARN(1, "unexpected: %d", rma);
b054b747 2833 }
f0706e82
JB		 2834}
2835
9c6bd790 2836static void ieee80211_sta_timer(unsigned long data)
f0706e82 2837{
60f8b39c
JB		 2838 struct ieee80211_sub_if_data *sdata =
2839 (struct ieee80211_sub_if_data *) data;
46900298 2840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2841 struct ieee80211_local *local = sdata->local;
f0706e82 2842
5bb644a0
JB		 2843 if (local->quiescing) {
2844 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2845 return;
2846 }
2847
64592c8f 2848 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2849}
2850
04ac3c0e 2851static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 2852 u8 *bssid, u8 reason, bool tx)
04ac3c0e 2853{
04ac3c0e 2854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2855 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2856
37ad3888 2857 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 2858 tx, frame_buf);
04ac3c0e 2859 mutex_unlock(&ifmgd->mtx);
37ad3888 2860
04ac3c0e
FF		 2861 /*
2862 * must be outside lock due to cfg80211,
2863 * but that's not a problem.
2864 */
6ae16775 2865 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 2866
04ac3c0e
FF		 2867 mutex_lock(&ifmgd->mtx);
2868}
2869
66e67e41
JB		 2870static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2871{
2872 struct ieee80211_local *local = sdata->local;
2873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2874 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 2875 u32 tx_flags = 0;
66e67e41
JB		 2876
2877 lockdep_assert_held(&ifmgd->mtx);
2878
2879 if (WARN_ON_ONCE(!auth_data))
2880 return -EINVAL;
2881
1672c0e3
JB		 2882 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2883 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2884 IEEE80211_TX_INTFL_MLME_CONN_TX;
2885
66e67e41
JB		 2886 auth_data->tries++;
2887
2888 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2889 sdata_info(sdata, "authentication with %pM timed out\n",
2890 auth_data->bss->bssid);
66e67e41
JB		 2891
2892 /*
2893 * Most likely AP is not in the range so remove the
2894 * bss struct for that AP.
2895 */
2896 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2897
2898 return -ETIMEDOUT;
2899 }
2900
a1845fc7
JB		 2901 drv_mgd_prepare_tx(local, sdata);
2902
66e67e41 2903 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2904 u16 trans = 1;
2905 u16 status = 0;
2906
bdcbd8e0
JB		 2907 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2908 auth_data->bss->bssid, auth_data->tries,
2909 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2910
2911 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2912
2913 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2914 trans = auth_data->sae_trans;
2915 status = auth_data->sae_status;
2916 auth_data->expected_transaction = trans;
2917 }
2918
2919 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2920 auth_data->data, auth_data->data_len,
66e67e41 2921 auth_data->bss->bssid,
1672c0e3
JB		 2922 auth_data->bss->bssid, NULL, 0, 0,
2923 tx_flags);
66e67e41
JB		 2924 } else {
2925 const u8 *ssidie;
2926
bdcbd8e0
JB		 2927 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2928 auth_data->bss->bssid, auth_data->tries,
2929 IEEE80211_AUTH_MAX_TRIES);
66e67e41 2930
9caf0364 2931 rcu_read_lock();
66e67e41 2932 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 2933 if (!ssidie) {
2934 rcu_read_unlock();
66e67e41 2935 return -EINVAL;
9caf0364 2936 }
66e67e41
JB		 2937 /*
2938 * Direct probe is sent to broadcast address as some APs
2939 * will not answer to direct packet in unassociated state.
2940 */
2941 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 2942 NULL, 0, (u32) -1, true, tx_flags,
55de908a 2943 auth_data->bss->channel, false);
9caf0364 2944 rcu_read_unlock();
66e67e41
JB		 2945 }
2946
1672c0e3
JB		 2947 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2948 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 2949 ifmgd->auth_data->timeout_started = true;
1672c0e3 2950 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 2951 } else {
2952 auth_data->timeout_started = false;
1672c0e3 2953 }
66e67e41
JB		 2954
2955 return 0;
2956}
2957
2958static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2959{
2960 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2961 struct ieee80211_local *local = sdata->local;
2962
2963 lockdep_assert_held(&sdata->u.mgd.mtx);
2964
66e67e41
JB		 2965 assoc_data->tries++;
2966 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2967 sdata_info(sdata, "association with %pM timed out\n",
2968 assoc_data->bss->bssid);
66e67e41
JB		 2969
2970 /*
2971 * Most likely AP is not in the range so remove the
2972 * bss struct for that AP.
2973 */
2974 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2975
2976 return -ETIMEDOUT;
2977 }
2978
bdcbd8e0
JB		 2979 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2980 assoc_data->bss->bssid, assoc_data->tries,
2981 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2982 ieee80211_send_assoc(sdata);
2983
1672c0e3
JB		 2984 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2985 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 2986 assoc_data->timeout_started = true;
1672c0e3 2987 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 2988 } else {
2989 assoc_data->timeout_started = false;
1672c0e3 2990 }
66e67e41
JB		 2991
2992 return 0;
2993}
2994
1672c0e3
JB		 2995void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
2996 __le16 fc, bool acked)
2997{
2998 struct ieee80211_local *local = sdata->local;
2999
3000 sdata->u.mgd.status_fc = fc;
3001 sdata->u.mgd.status_acked = acked;
3002 sdata->u.mgd.status_received = true;
3003
3004 ieee80211_queue_work(&local->hw, &sdata->work);
3005}
3006
1fa57d01 3007void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3008{
9c6bd790 3009 struct ieee80211_local *local = sdata->local;
1fa57d01 3010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3011
77fdaa12
JB		 3012 mutex_lock(&ifmgd->mtx);
3013
1672c0e3
JB		 3014 if (ifmgd->status_received) {
3015 __le16 fc = ifmgd->status_fc;
3016 bool status_acked = ifmgd->status_acked;
3017
3018 ifmgd->status_received = false;
3019 if (ifmgd->auth_data &&
3020 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3021 if (status_acked) {
3022 ifmgd->auth_data->timeout =
3023 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3024 run_again(ifmgd, ifmgd->auth_data->timeout);
3025 } else {
3026 ifmgd->auth_data->timeout = jiffies - 1;
3027 }
89afe614 3028 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3029 } else if (ifmgd->assoc_data &&
3030 (ieee80211_is_assoc_req(fc) ||
3031 ieee80211_is_reassoc_req(fc))) {
3032 if (status_acked) {
3033 ifmgd->assoc_data->timeout =
3034 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3035 run_again(ifmgd, ifmgd->assoc_data->timeout);
3036 } else {
3037 ifmgd->assoc_data->timeout = jiffies - 1;
3038 }
89afe614 3039 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3040 }
3041 }
3042
89afe614 3043 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3044 time_after(jiffies, ifmgd->auth_data->timeout)) {
3045 if (ifmgd->auth_data->done) {
3046 /*
3047 * ok ... we waited for assoc but userspace didn't,
3048 * so let's just kill the auth data
3049 */
3050 ieee80211_destroy_auth_data(sdata, false);
3051 } else if (ieee80211_probe_auth(sdata)) {
3052 u8 bssid[ETH_ALEN];
3053
3054 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3055
3056 ieee80211_destroy_auth_data(sdata, false);
3057
3058 mutex_unlock(&ifmgd->mtx);
3059 cfg80211_send_auth_timeout(sdata->dev, bssid);
3060 mutex_lock(&ifmgd->mtx);
3061 }
89afe614 3062 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3063 run_again(ifmgd, ifmgd->auth_data->timeout);
3064
89afe614 3065 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3066 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3067 if ((ifmgd->assoc_data->need_beacon &&
3068 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3069 ieee80211_do_assoc(sdata)) {
3070 u8 bssid[ETH_ALEN];
3071
3072 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3073
3074 ieee80211_destroy_assoc_data(sdata, false);
3075
3076 mutex_unlock(&ifmgd->mtx);
3077 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3078 mutex_lock(&ifmgd->mtx);
3079 }
89afe614 3080 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3081 run_again(ifmgd, ifmgd->assoc_data->timeout);
3082
b291ba11
JB		 3083 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3084 IEEE80211_STA_CONNECTION_POLL) &&
3085 ifmgd->associated) {
a43abf29 3086 u8 bssid[ETH_ALEN];
72a8a3ed 3087 int max_tries;
a43abf29 3088
0c1ad2ca 3089 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3090
72a8a3ed 3091 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3092 max_tries = max_nullfunc_tries;
72a8a3ed 3093 else
180205bd 3094 max_tries = max_probe_tries;
72a8a3ed 3095
4e5ff376
FF		 3096 /* ACK received for nullfunc probing frame */
3097 if (!ifmgd->probe_send_count)
3098 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3099 else if (ifmgd->nullfunc_failed) {
3100 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3101 mlme_dbg(sdata,
3102 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3103 bssid, ifmgd->probe_send_count,
3104 max_tries);
04ac3c0e
FF		 3105 ieee80211_mgd_probe_ap_send(sdata);
3106 } else {
bdcbd8e0
JB		 3107 mlme_dbg(sdata,
3108 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3109 bssid);
95acac61 3110 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3111 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3112 false);
04ac3c0e
FF		 3113 }
3114 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3115 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3116 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3117 mlme_dbg(sdata,
3118 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3119 bssid, probe_wait_ms);
95acac61 3120 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3121 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3122 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3123 mlme_dbg(sdata,
3124 "No probe response from AP %pM after %dms, try %d/%i\n",
3125 bssid, probe_wait_ms,
3126 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3127 ieee80211_mgd_probe_ap_send(sdata);
3128 } else {
b291ba11
JB		 3129 /*
3130 * We actually lost the connection ... or did we?
3131 * Let's make sure!
3132 */
b38afa87
BG		 3133 wiphy_debug(local->hw.wiphy,
3134 "%s: No probe response from AP %pM"
3135 " after %dms, disconnecting.\n",
3136 sdata->name,
180205bd 3137 bssid, probe_wait_ms);
04ac3c0e 3138
95acac61 3139 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3140 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3141 }
3142 }
3143
77fdaa12 3144 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3145}
3146
b291ba11
JB		 3147static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3148{
3149 struct ieee80211_sub_if_data *sdata =
3150 (struct ieee80211_sub_if_data *) data;
3151 struct ieee80211_local *local = sdata->local;
3152
3153 if (local->quiescing)
3154 return;
3155
682bd38b 3156 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3157 ieee80211_queue_work(&sdata->local->hw,
3158 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3159}
3160
3161static void ieee80211_sta_conn_mon_timer(unsigned long data)
3162{
3163 struct ieee80211_sub_if_data *sdata =
3164 (struct ieee80211_sub_if_data *) data;
3165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3166 struct ieee80211_local *local = sdata->local;
3167
3168 if (local->quiescing)
3169 return;
3170
42935eca 3171 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3172}
3173
3174static void ieee80211_sta_monitor_work(struct work_struct *work)
3175{
3176 struct ieee80211_sub_if_data *sdata =
3177 container_of(work, struct ieee80211_sub_if_data,
3178 u.mgd.monitor_work);
3179
3180 ieee80211_mgd_probe_ap(sdata, false);
3181}
3182
9c6bd790
JB		 3183static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3184{
494f1fe5
EP		 3185 u32 flags;
3186
ad935687 3187 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3188 __ieee80211_stop_poll(sdata);
ad935687 3189
b291ba11 3190 /* let's probe the connection once */
494f1fe5
EP		 3191 flags = sdata->local->hw.flags;
3192 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3193 ieee80211_queue_work(&sdata->local->hw,
3194 &sdata->u.mgd.monitor_work);
b291ba11 3195 /* and do all the other regular work too */
64592c8f 3196 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3197 }
9c6bd790 3198}
f0706e82 3199
5bb644a0
JB		 3200#ifdef CONFIG_PM
3201void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3202{
3203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3204
3205 /*
3206 * we need to use atomic bitops for the running bits
3207 * only because both timers might fire at the same
3208 * time -- the code here is properly synchronised.
3209 */
3210
d1f5b7a3
JB		 3211 cancel_work_sync(&ifmgd->request_smps_work);
3212
0ecfe806 3213 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3214 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3215 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3216 if (del_timer_sync(&ifmgd->timer))
3217 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3218
3219 cancel_work_sync(&ifmgd->chswitch_work);
3220 if (del_timer_sync(&ifmgd->chswitch_timer))
3221 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3222
b291ba11
JB		 3223 /* these will just be re-established on connection */
3224 del_timer_sync(&ifmgd->conn_mon_timer);
3225 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3226}
3227
3228void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3229{
3230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3231
782d2673
JB		 3232 mutex_lock(&ifmgd->mtx);
3233 if (!ifmgd->associated) {
3234 mutex_unlock(&ifmgd->mtx);
676b58c2 3235 return;
782d2673 3236 }
676b58c2 3237
95acac61
JB		 3238 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3239 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
782d2673
JB		 3240 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3241 ieee80211_sta_connection_lost(sdata,
3242 ifmgd->associated->bssid,
6b684db1
JB		 3243 WLAN_REASON_UNSPECIFIED,
3244 true);
95acac61 3245 mutex_unlock(&ifmgd->mtx);
782d2673 3246 return;
95acac61 3247 }
782d2673 3248 mutex_unlock(&ifmgd->mtx);
95acac61 3249
5bb644a0
JB		 3250 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3251 add_timer(&ifmgd->timer);
3252 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3253 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3254 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3255
3256 mutex_lock(&sdata->local->mtx);
46090979 3257 ieee80211_restart_sta_timer(sdata);
925e64c3 3258 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3259}
3260#endif
3261
9c6bd790
JB		 3262/* interface setup */
3263void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3264{
46900298 3265 struct ieee80211_if_managed *ifmgd;
988c0f72 3266
46900298 3267 ifmgd = &sdata->u.mgd;
b291ba11 3268 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3269 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3270 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3271 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3272 INIT_WORK(&ifmgd->csa_connection_drop_work,
3273 ieee80211_csa_connection_drop_work);
d1f5b7a3 3274 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3275 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3276 (unsigned long) sdata);
b291ba11
JB		 3277 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3278 (unsigned long) sdata);
3279 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3280 (unsigned long) sdata);
46900298 3281 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3282 (unsigned long) sdata);
9c6bd790 3283
ab1faead 3284 ifmgd->flags = 0;
1478acb3 3285 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3286 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3287 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3288
77fdaa12 3289 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3290
3291 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3292 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3293 else
3294 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3295}
3296
77fdaa12
JB		 3297/* scan finished notification */
3298void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3299{
31ee67a1 3300 struct ieee80211_sub_if_data *sdata;
60f8b39c 3301
77fdaa12
JB		 3302 /* Restart STA timers */
3303 rcu_read_lock();
3304 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3305 ieee80211_restart_sta_timer(sdata);
3306 rcu_read_unlock();
3307}
60f8b39c 3308
77fdaa12
JB		 3309int ieee80211_max_network_latency(struct notifier_block *nb,
3310 unsigned long data, void *dummy)
3311{
3312 s32 latency_usec = (s32) data;
3313 struct ieee80211_local *local =
3314 container_of(nb, struct ieee80211_local,
3315 network_latency_notifier);
1fa6f4af 3316
77fdaa12
JB		 3317 mutex_lock(&local->iflist_mtx);
3318 ieee80211_recalc_ps(local, latency_usec);
3319 mutex_unlock(&local->iflist_mtx);
dfe67012 3320
77fdaa12 3321 return 0;
9c6bd790
JB		 3322}
3323
f2d9d270
JB		 3324static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3325{
3326 u32 ret;
3327 int tmp;
3328
3329 switch (c->width) {
3330 case NL80211_CHAN_WIDTH_20:
3331 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3332 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3333 break;
3334 case NL80211_CHAN_WIDTH_40:
3335 c->width = NL80211_CHAN_WIDTH_20;
3336 c->center_freq1 = c->chan->center_freq;
3337 ret = IEEE80211_STA_DISABLE_40MHZ |
3338 IEEE80211_STA_DISABLE_VHT;
3339 break;
3340 case NL80211_CHAN_WIDTH_80:
3341 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3342 /* n_P40 */
3343 tmp /= 2;
3344 /* freq_P40 */
3345 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3346 c->width = NL80211_CHAN_WIDTH_40;
3347 ret = IEEE80211_STA_DISABLE_VHT;
3348 break;
3349 case NL80211_CHAN_WIDTH_80P80:
3350 c->center_freq2 = 0;
3351 c->width = NL80211_CHAN_WIDTH_80;
3352 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3353 IEEE80211_STA_DISABLE_160MHZ;
3354 break;
3355 case NL80211_CHAN_WIDTH_160:
3356 /* n_P20 */
3357 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3358 /* n_P80 */
3359 tmp /= 4;
3360 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3361 c->width = NL80211_CHAN_WIDTH_80;
3362 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3363 IEEE80211_STA_DISABLE_160MHZ;
3364 break;
3365 default:
3366 case NL80211_CHAN_WIDTH_20_NOHT:
3367 WARN_ON_ONCE(1);
3368 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3369 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3370 break;
3371 }
3372
3373 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3374
3375 return ret;
3376}
3377
3378static u32
3379ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3380 struct ieee80211_supported_band *sband,
3381 struct ieee80211_channel *channel,
3382 const struct ieee80211_ht_operation *ht_oper,
3383 const struct ieee80211_vht_operation *vht_oper,
3384 struct cfg80211_chan_def *chandef)
3385{
3386 struct cfg80211_chan_def vht_chandef;
3387 u32 ht_cfreq, ret;
3388
3389 chandef->chan = channel;
3390 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3391 chandef->center_freq1 = channel->center_freq;
3392 chandef->center_freq2 = 0;
3393
3394 if (!ht_oper || !sband->ht_cap.ht_supported) {
3395 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3396 goto out;
3397 }
3398
3399 chandef->width = NL80211_CHAN_WIDTH_20;
3400
3401 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3402 channel->band);
3403 /* check that channel matches the right operating channel */
3404 if (channel->center_freq != ht_cfreq) {
3405 /*
3406 * It's possible that some APs are confused here;
3407 * Netgear WNDR3700 sometimes reports 4 higher than
3408 * the actual channel in association responses, but
3409 * since we look at probe response/beacon data here
3410 * it should be OK.
3411 */
3412 sdata_info(sdata,
3413 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3414 channel->center_freq, ht_cfreq,
3415 ht_oper->primary_chan, channel->band);
3416 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3417 goto out;
3418 }
3419
3420 /* check 40 MHz support, if we have it */
3421 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3422 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3423 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3424 chandef->width = NL80211_CHAN_WIDTH_40;
3425 chandef->center_freq1 += 10;
3426 break;
3427 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3428 chandef->width = NL80211_CHAN_WIDTH_40;
3429 chandef->center_freq1 -= 10;
3430 break;
3431 }
3432 } else {
3433 /* 40 MHz (and 80 MHz) must be supported for VHT */
3434 ret = IEEE80211_STA_DISABLE_VHT;
3435 goto out;
3436 }
3437
3438 if (!vht_oper || !sband->vht_cap.vht_supported) {
3439 ret = IEEE80211_STA_DISABLE_VHT;
3440 goto out;
3441 }
3442
3443 vht_chandef.chan = channel;
3444 vht_chandef.center_freq1 =
3445 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3446 channel->band);
3447 vht_chandef.center_freq2 = 0;
3448
3449 if (vht_oper->center_freq_seg2_idx)
3450 vht_chandef.center_freq2 =
3451 ieee80211_channel_to_frequency(
3452 vht_oper->center_freq_seg2_idx,
3453 channel->band);
3454
3455 switch (vht_oper->chan_width) {
3456 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3457 vht_chandef.width = chandef->width;
3458 break;
3459 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3460 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3461 break;
3462 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3463 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3464 break;
3465 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3466 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3467 break;
3468 default:
3469 sdata_info(sdata,
3470 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3471 vht_oper->chan_width);
3472 ret = IEEE80211_STA_DISABLE_VHT;
3473 goto out;
3474 }
3475
3476 if (!cfg80211_chandef_valid(&vht_chandef)) {
3477 sdata_info(sdata,
3478 "AP VHT information is invalid, disable VHT\n");
3479 ret = IEEE80211_STA_DISABLE_VHT;
3480 goto out;
3481 }
3482
3483 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3484 ret = 0;
3485 goto out;
3486 }
3487
3488 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3489 sdata_info(sdata,
3490 "AP VHT information doesn't match HT, disable VHT\n");
3491 ret = IEEE80211_STA_DISABLE_VHT;
3492 goto out;
3493 }
3494
3495 *chandef = vht_chandef;
3496
3497 ret = 0;
3498
3d9646d0 3499out:
f2d9d270
JB		 3500 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3501 IEEE80211_CHAN_DISABLED)) {
3502 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3503 ret = IEEE80211_STA_DISABLE_HT |
3504 IEEE80211_STA_DISABLE_VHT;
3505 goto out;
3506 }
3507
3d9646d0 3508 ret |= chandef_downgrade(chandef);
f2d9d270
JB		 3509 }
3510
3511 if (chandef->width != vht_chandef.width)
3512 sdata_info(sdata,
3d9646d0 3513 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
f2d9d270 3514
f2d9d270
JB		 3515 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3516 return ret;
3517}
3518
3519static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3520 struct cfg80211_bss *cbss)
3521{
3522 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3523 const u8 *ht_cap_ie, *vht_cap_ie;
3524 const struct ieee80211_ht_cap *ht_cap;
3525 const struct ieee80211_vht_cap *vht_cap;
3526 u8 chains = 1;
3527
3528 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3529 return chains;
3530
9caf0364 3531 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3532 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3533 ht_cap = (void *)(ht_cap_ie + 2);
3534 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3535 /*
3536 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3537 * "Tx Unequal Modulation Supported" fields.
3538 */
3539 }
3540
3541 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3542 return chains;
3543
9caf0364 3544 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3545 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3546 u8 nss;
3547 u16 tx_mcs_map;
3548
3549 vht_cap = (void *)(vht_cap_ie + 2);
3550 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3551 for (nss = 8; nss > 0; nss--) {
3552 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3553 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3554 break;
3555 }
3556 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3557 chains = max(chains, nss);
3558 }
3559
3560 return chains;
3561}
3562
b17166a7
JB		 3563static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3564 struct cfg80211_bss *cbss)
a1cf775d
JB		 3565{
3566 struct ieee80211_local *local = sdata->local;
3567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3568 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3569 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3570 struct ieee80211_supported_band *sband;
4bf88530 3571 struct cfg80211_chan_def chandef;
f2d9d270 3572 int ret;
a1cf775d 3573
24398e39
JB		 3574 sband = local->hw.wiphy->bands[cbss->channel->band];
3575
f2d9d270
JB		 3576 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3577 IEEE80211_STA_DISABLE_80P80MHZ |
3578 IEEE80211_STA_DISABLE_160MHZ);
3579
9caf0364
JB		 3580 rcu_read_lock();
3581
f2d9d270
JB		 3582 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3583 sband->ht_cap.ht_supported) {
08e6effa 3584 const u8 *ht_oper_ie, *ht_cap;
24398e39 3585
9caf0364 3586 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3587 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3588 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3589
3590 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3591 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3592 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3593 ht_oper = NULL;
3594 }
24398e39
JB		 3595 }
3596
f2d9d270
JB		 3597 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3598 sband->vht_cap.vht_supported) {
08e6effa 3599 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3600
9caf0364
JB		 3601 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3602 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3603 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3604 vht_oper = (void *)(vht_oper_ie + 2);
3605 if (vht_oper && !ht_oper) {
3606 vht_oper = NULL;
bdcbd8e0 3607 sdata_info(sdata,
f2d9d270 3608 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3609 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3610 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3611 }
08e6effa
JB		 3612
3613 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3614 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3615 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3616 vht_oper = NULL;
3617 }
24398e39
JB		 3618 }
3619
f2d9d270
JB		 3620 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3621 cbss->channel,
3622 ht_oper, vht_oper,
3623 &chandef);
04ecd257 3624
f2d9d270
JB		 3625 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3626 local->rx_chains);
24398e39 3627
9caf0364
JB		 3628 rcu_read_unlock();
3629
04ecd257
JB		 3630 /* will change later if needed */
3631 sdata->smps_mode = IEEE80211_SMPS_OFF;
3632
f2d9d270
JB		 3633 /*
3634 * If this fails (possibly due to channel context sharing
3635 * on incompatible channels, e.g. 80+80 and 160 sharing the
3636 * same control channel) try to use a smaller bandwidth.
3637 */
3638 ret = ieee80211_vif_use_channel(sdata, &chandef,
3639 IEEE80211_CHANCTX_SHARED);
d601cd8d 3640 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3641 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3642 ret = ieee80211_vif_use_channel(sdata, &chandef,
3643 IEEE80211_CHANCTX_SHARED);
3644 }
f2d9d270 3645 return ret;
b17166a7
JB		 3646}
3647
3648static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3649 struct cfg80211_bss *cbss, bool assoc)
3650{
3651 struct ieee80211_local *local = sdata->local;
3652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3653 struct ieee80211_bss *bss = (void *)cbss->priv;
3654 struct sta_info *new_sta = NULL;
3655 bool have_sta = false;
3656 int err;
3657
3658 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3659 return -EINVAL;
3660
3661 if (assoc) {
3662 rcu_read_lock();
3663 have_sta = sta_info_get(sdata, cbss->bssid);
3664 rcu_read_unlock();
3665 }
3666
3667 if (!have_sta) {
3668 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3669 if (!new_sta)
3670 return -ENOMEM;
3671 }
3672
13e0c8e3 3673 if (new_sta) {
5d6a1b06
JB		 3674 u32 rates = 0, basic_rates = 0;
3675 bool have_higher_than_11mbit;
3676 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3677 struct ieee80211_supported_band *sband;
8cef2c9d 3678 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3679
3680 sband = local->hw.wiphy->bands[cbss->channel->band];
3681
3682 err = ieee80211_prep_channel(sdata, cbss);
3683 if (err) {
3684 sta_info_free(local, new_sta);
3685 return err;
3686 }
5d6a1b06 3687
5d6a1b06
JB		 3688 ieee80211_get_rates(sband, bss->supp_rates,
3689 bss->supp_rates_len,
3690 &rates, &basic_rates,
3691 &have_higher_than_11mbit,
3692 &min_rate, &min_rate_index);
3693
3694 /*
3695 * This used to be a workaround for basic rates missing
3696 * in the association response frame. Now that we no
3697 * longer use the basic rates from there, it probably
3698 * doesn't happen any more, but keep the workaround so
3699 * in case some *other* APs are buggy in different ways
3700 * we can connect -- with a warning.
3701 */
3702 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3703 sdata_info(sdata,
3704 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3705 basic_rates = BIT(min_rate_index);
3706 }
3707
13e0c8e3 3708 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3709 sdata->vif.bss_conf.basic_rates = basic_rates;
3710
3711 /* cf. IEEE 802.11 9.2.12 */
55de908a 3712 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3713 have_higher_than_11mbit)
3714 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3715 else
3716 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3717
3718 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3719
8c358bcd
JB		 3720 /* set timing information */
3721 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3722 rcu_read_lock();
ef429dad
JB		 3723 ies = rcu_dereference(cbss->beacon_ies);
3724 if (ies) {
3725 const u8 *tim_ie;
3726
3727 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3728 sdata->vif.bss_conf.sync_device_ts =
3729 bss->device_ts_beacon;
3730 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3731 ies->data, ies->len);
3732 if (tim_ie && tim_ie[1] >= 2)
3733 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3734 else
3735 sdata->vif.bss_conf.sync_dtim_count = 0;
3736 } else if (!(local->hw.flags &
3737 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3738 ies = rcu_dereference(cbss->proberesp_ies);
3739 /* must be non-NULL since beacon IEs were NULL */
3740 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3741 sdata->vif.bss_conf.sync_device_ts =
3742 bss->device_ts_presp;
3743 sdata->vif.bss_conf.sync_dtim_count = 0;
3744 } else {
3745 sdata->vif.bss_conf.sync_tsf = 0;
3746 sdata->vif.bss_conf.sync_device_ts = 0;
3747 sdata->vif.bss_conf.sync_dtim_count = 0;
3748 }
8cef2c9d 3749 rcu_read_unlock();
8c358bcd
JB		 3750
3751 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3752 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3753 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3754 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3755
3756 if (assoc)
13e0c8e3 3757 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3758
13e0c8e3
JB		 3759 err = sta_info_insert(new_sta);
3760 new_sta = NULL;
a1cf775d 3761 if (err) {
bdcbd8e0
JB		 3762 sdata_info(sdata,
3763 "failed to insert STA entry for the AP (error %d)\n",
3764 err);
a1cf775d
JB		 3765 return err;
3766 }
3767 } else
b203ca39 3768 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3769
3770 return 0;
3771}
3772
77fdaa12
JB		 3773/* config hooks */
3774int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3775 struct cfg80211_auth_request *req)
9c6bd790 3776{
66e67e41
JB		 3777 struct ieee80211_local *local = sdata->local;
3778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3779 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3780 u16 auth_alg;
66e67e41
JB		 3781 int err;
3782
3783 /* prepare auth data structure */
9c6bd790 3784
77fdaa12
JB		 3785 switch (req->auth_type) {
3786 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3787 auth_alg = WLAN_AUTH_OPEN;
3788 break;
3789 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3790 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3791 return -EOPNOTSUPP;
77fdaa12
JB		 3792 auth_alg = WLAN_AUTH_SHARED_KEY;
3793 break;
3794 case NL80211_AUTHTYPE_FT:
3795 auth_alg = WLAN_AUTH_FT;
3796 break;
3797 case NL80211_AUTHTYPE_NETWORK_EAP:
3798 auth_alg = WLAN_AUTH_LEAP;
3799 break;
6b8ece3a
JM		 3800 case NL80211_AUTHTYPE_SAE:
3801 auth_alg = WLAN_AUTH_SAE;
3802 break;
77fdaa12
JB		 3803 default:
3804 return -EOPNOTSUPP;
60f8b39c 3805 }
77fdaa12 3806
6b8ece3a
JM		 3807 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3808 req->ie_len, GFP_KERNEL);
66e67e41 3809 if (!auth_data)
9c6bd790 3810 return -ENOMEM;
77fdaa12 3811
66e67e41 3812 auth_data->bss = req->bss;
77fdaa12 3813
6b8ece3a
JM		 3814 if (req->sae_data_len >= 4) {
3815 __le16 *pos = (__le16 *) req->sae_data;
3816 auth_data->sae_trans = le16_to_cpu(pos[0]);
3817 auth_data->sae_status = le16_to_cpu(pos[1]);
3818 memcpy(auth_data->data, req->sae_data + 4,
3819 req->sae_data_len - 4);
3820 auth_data->data_len += req->sae_data_len - 4;
3821 }
3822
77fdaa12 3823 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3824 memcpy(&auth_data->data[auth_data->data_len],
3825 req->ie, req->ie_len);
3826 auth_data->data_len += req->ie_len;
9c6bd790 3827 }
77fdaa12 3828
fffd0934 3829 if (req->key && req->key_len) {
66e67e41
JB		 3830 auth_data->key_len = req->key_len;
3831 auth_data->key_idx = req->key_idx;
3832 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3833 }
3834
66e67e41 3835 auth_data->algorithm = auth_alg;
60f8b39c 3836
66e67e41 3837 /* try to authenticate/probe */
2a33bee2 3838
66e67e41 3839 mutex_lock(&ifmgd->mtx);
2a33bee2 3840
66e67e41
JB		 3841 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3842 ifmgd->assoc_data) {
3843 err = -EBUSY;
3844 goto err_free;
2a33bee2
GE		 3845 }
3846
66e67e41
JB		 3847 if (ifmgd->auth_data)
3848 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3849
66e67e41
JB		 3850 /* prep auth_data so we don't go into idle on disassoc */
3851 ifmgd->auth_data = auth_data;
af6b6374 3852
66e67e41 3853 if (ifmgd->associated)
37ad3888 3854 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3855
bdcbd8e0 3856 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3857
a1cf775d
JB		 3858 err = ieee80211_prep_connection(sdata, req->bss, false);
3859 if (err)
66e67e41 3860 goto err_clear;
af6b6374 3861
66e67e41
JB		 3862 err = ieee80211_probe_auth(sdata);
3863 if (err) {
66e67e41
JB		 3864 sta_info_destroy_addr(sdata, req->bss->bssid);
3865 goto err_clear;
3866 }
3867
3868 /* hold our own reference */
5b112d3d 3869 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3870 err = 0;
3871 goto out_unlock;
3872
3873 err_clear:
3d2abdfd
EP		 3874 memset(ifmgd->bssid, 0, ETH_ALEN);
3875 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3876 ifmgd->auth_data = NULL;
3877 err_free:
3878 kfree(auth_data);
3879 out_unlock:
3880 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3881
66e67e41 3882 return err;
af6b6374
JB		 3883}
3884
77fdaa12
JB		 3885int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3886 struct cfg80211_assoc_request *req)
f0706e82 3887{
66e67e41 3888 struct ieee80211_local *local = sdata->local;
77fdaa12 3889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3890 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3891 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3892 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3893 struct ieee80211_supported_band *sband;
b08fbbd8 3894 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3895 int i, err;
f0706e82 3896
66e67e41
JB		 3897 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3898 if (!assoc_data)
3899 return -ENOMEM;
3900
9caf0364
JB		 3901 rcu_read_lock();
3902 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3903 if (!ssidie) {
3904 rcu_read_unlock();
3905 kfree(assoc_data);
3906 return -EINVAL;
3907 }
3908 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3909 assoc_data->ssid_len = ssidie[1];
3910 rcu_read_unlock();
3911
77fdaa12 3912 mutex_lock(&ifmgd->mtx);
9c87ba67 3913
66e67e41 3914 if (ifmgd->associated)
37ad3888 3915 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3916
3917 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3918 err = -EBUSY;
3919 goto err_free;
af6b6374 3920 }
77fdaa12 3921
66e67e41
JB		 3922 if (ifmgd->assoc_data) {
3923 err = -EBUSY;
3924 goto err_free;
3925 }
77fdaa12 3926
66e67e41
JB		 3927 if (ifmgd->auth_data) {
3928 bool match;
3929
3930 /* keep sta info, bssid if matching */
b203ca39 3931 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3932 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3933 }
3934
66e67e41 3935 /* prepare assoc data */
19c3b830 3936
d8ec4433
JO		 3937 ifmgd->beacon_crc_valid = false;
3938
de5036aa
JB		 3939 /*
3940 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3941 * We still associate in non-HT mode (11a/b/g) if any one of these
3942 * ciphers is configured as pairwise.
3943 * We can set this to true for non-11n hardware, that'll be checked
3944 * separately along with the peer capabilities.
3945 */
1c4cb928 3946 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3947 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3948 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3949 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3950 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3951 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3952 netdev_info(sdata->dev,
d545daba 3953 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3954 }
3955 }
77fdaa12 3956
d545daba 3957 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3958 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3959 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3960 }
ef96a842 3961
4e74bfdb
JB		 3962 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3963 sband = local->hw.wiphy->bands[req->bss->channel->band];
3964 if (!sband->ht_cap.ht_supported ||
1c4cb928 3965 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3966 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3967 if (!bss->wmm_used)
3968 netdev_info(sdata->dev,
3969 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3970 }
4e74bfdb 3971
d545daba
MP		 3972 /* disable VHT if we don't support it or the AP doesn't use WMM */
3973 if (!sband->vht_cap.vht_supported ||
3974 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3975 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3976 if (!bss->wmm_used)
3977 netdev_info(sdata->dev,
3978 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3979 }
3980
ef96a842
BG		 3981 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3982 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3983 sizeof(ifmgd->ht_capa_mask));
3984
77fdaa12 3985 if (req->ie && req->ie_len) {
66e67e41
JB		 3986 memcpy(assoc_data->ie, req->ie, req->ie_len);
3987 assoc_data->ie_len = req->ie_len;
3988 }
f679f65d 3989
66e67e41 3990 assoc_data->bss = req->bss;
f679f65d 3991
af6b6374
JB		 3992 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3993 if (ifmgd->powersave)
04ecd257 3994 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3995 else
04ecd257 3996 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3997 } else
04ecd257 3998 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3999
66e67e41 4000 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4001 assoc_data->wmm = bss->wmm_used &&
4002 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4003 assoc_data->supp_rates = bss->supp_rates;
4004 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4005
9caf0364 4006 rcu_read_lock();
9dde6423
JB		 4007 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4008 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4009 assoc_data->ap_ht_param =
4010 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4011 else
a8243b72 4012 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4013 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4014 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4015 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4016 sizeof(struct ieee80211_vht_cap));
4017 else
4018 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4019 rcu_read_unlock();
63f170e0 4020
ab13315a
KV		 4021 if (bss->wmm_used && bss->uapsd_supported &&
4022 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4023 assoc_data->uapsd = true;
ab13315a
KV		 4024 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4025 } else {
76f0303d 4026 assoc_data->uapsd = false;
ab13315a
KV		 4027 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4028 }
4029
77fdaa12 4030 if (req->prev_bssid)
66e67e41 4031 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4032
4033 if (req->use_mfp) {
4034 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4035 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4036 } else {
4037 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4038 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4039 }
4040
4041 if (req->crypto.control_port)
4042 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4043 else
4044 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4045
a621fa4d
JB		 4046 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4047 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4048
66e67e41
JB		 4049 /* kick off associate process */
4050
4051 ifmgd->assoc_data = assoc_data;
826262c3 4052 ifmgd->dtim_period = 0;
66e67e41 4053
a1cf775d
JB		 4054 err = ieee80211_prep_connection(sdata, req->bss, true);
4055 if (err)
4056 goto err_clear;
66e67e41 4057
c65dd147
EG		 4058 rcu_read_lock();
4059 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4060
c65dd147
EG		 4061 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4062 !beacon_ies) {
4063 /*
4064 * Wait up to one beacon interval ...
4065 * should this be more if we miss one?
4066 */
4067 sdata_info(sdata, "waiting for beacon from %pM\n",
4068 ifmgd->bssid);
4069 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4070 assoc_data->timeout_started = true;
c65dd147
EG		 4071 assoc_data->need_beacon = true;
4072 } else if (beacon_ies) {
4073 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4074 beacon_ies->data,
4075 beacon_ies->len);
ef429dad
JB		 4076 u8 dtim_count = 0;
4077
c65dd147
EG		 4078 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4079 const struct ieee80211_tim_ie *tim;
4080 tim = (void *)(tim_ie + 2);
4081 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4082 dtim_count = tim->dtim_count;
826262c3 4083 }
66e67e41 4084 assoc_data->have_beacon = true;
66e67e41 4085 assoc_data->timeout = jiffies;
89afe614 4086 assoc_data->timeout_started = true;
ef429dad
JB		 4087
4088 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4089 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4090 sdata->vif.bss_conf.sync_device_ts =
4091 bss->device_ts_beacon;
4092 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4093 }
c65dd147
EG		 4094 } else {
4095 assoc_data->timeout = jiffies;
89afe614 4096 assoc_data->timeout_started = true;
66e67e41 4097 }
c65dd147
EG		 4098 rcu_read_unlock();
4099
66e67e41
JB		 4100 run_again(ifmgd, assoc_data->timeout);
4101
fcff4f10
PS		 4102 if (bss->corrupt_data) {
4103 char *corrupt_type = "data";
4104 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4105 if (bss->corrupt_data &
4106 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4107 corrupt_type = "beacon and probe response";
4108 else
4109 corrupt_type = "beacon";
4110 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4111 corrupt_type = "probe response";
bdcbd8e0
JB		 4112 sdata_info(sdata, "associating with AP with corrupt %s\n",
4113 corrupt_type);
fcff4f10
PS		 4114 }
4115
66e67e41
JB		 4116 err = 0;
4117 goto out;
4118 err_clear:
3d2abdfd
EP		 4119 memset(ifmgd->bssid, 0, ETH_ALEN);
4120 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4121 ifmgd->assoc_data = NULL;
4122 err_free:
4123 kfree(assoc_data);
4124 out:
4125 mutex_unlock(&ifmgd->mtx);
4126
4127 return err;
f0706e82
JB		 4128}
4129
77fdaa12 4130int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4131 struct cfg80211_deauth_request *req)
f0706e82 4132{
46900298 4133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4134 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4135 bool tx = !req->local_state_change;
86552017 4136 bool sent_frame = false;
f0706e82 4137
77fdaa12
JB		 4138 mutex_lock(&ifmgd->mtx);
4139
bdcbd8e0
JB		 4140 sdata_info(sdata,
4141 "deauthenticating from %pM by local choice (reason=%d)\n",
4142 req->bssid, req->reason_code);
0ff71613 4143
86552017 4144 if (ifmgd->auth_data) {
8c7d857c 4145 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4146 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4147 IEEE80211_STYPE_DEAUTH,
6863255b 4148 req->reason_code, tx,
37ad3888 4149 frame_buf);
86552017
JB		 4150 ieee80211_destroy_auth_data(sdata, false);
4151 mutex_unlock(&ifmgd->mtx);
4152
4153 sent_frame = tx;
4154 goto out;
8c7d857c
EG		 4155 }
4156
86552017
JB		 4157 if (ifmgd->associated &&
4158 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4159 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4160 req->reason_code, tx, frame_buf);
4161 sent_frame = tx;
4162 }
37ad3888
JB		 4163 mutex_unlock(&ifmgd->mtx);
4164
86552017 4165 out:
86552017
JB		 4166 if (sent_frame)
4167 __cfg80211_send_deauth(sdata->dev, frame_buf,
4168 IEEE80211_DEAUTH_FRAME_LEN);
4169
f0706e82
JB		 4170 return 0;
4171}
84363e6e 4172
77fdaa12 4173int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4174 struct cfg80211_disassoc_request *req)
9c6bd790 4175{
77fdaa12 4176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4177 u8 bssid[ETH_ALEN];
6ae16775 4178 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4179
77fdaa12 4180 mutex_lock(&ifmgd->mtx);
10f644a4 4181
8d8b261a
JB		 4182 /*
4183 * cfg80211 should catch this ... but it's racy since
4184 * we can receive a disassoc frame, process it, hand it
4185 * to cfg80211 while that's in a locked section already
4186 * trying to tell us that the user wants to disconnect.
4187 */
0c1ad2ca 4188 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4189 mutex_unlock(&ifmgd->mtx);
4190 return -ENOLINK;
4191 }
4192
bdcbd8e0
JB		 4193 sdata_info(sdata,
4194 "disassociating from %pM by local choice (reason=%d)\n",
4195 req->bss->bssid, req->reason_code);
0ff71613 4196
e69e95db 4197 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4198 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4199 req->reason_code, !req->local_state_change,
4200 frame_buf);
77fdaa12 4201 mutex_unlock(&ifmgd->mtx);
10f644a4 4202
6ae16775
AQ		 4203 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4204 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4205
10f644a4
JB		 4206 return 0;
4207}
026331c4 4208
afa762f6 4209void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4210{
4211 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4212
4213 mutex_lock(&ifmgd->mtx);
4214 if (ifmgd->assoc_data)
4215 ieee80211_destroy_assoc_data(sdata, false);
4216 if (ifmgd->auth_data)
4217 ieee80211_destroy_auth_data(sdata, false);
4218 del_timer_sync(&ifmgd->timer);
4219 mutex_unlock(&ifmgd->mtx);
4220}
4221
a97c13c3
JO		 4222void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4223 enum nl80211_cqm_rssi_threshold_event rssi_event,
4224 gfp_t gfp)
4225{
4226 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4227
b5878a2d
JB		 4228 trace_api_cqm_rssi_notify(sdata, rssi_event);
4229
a97c13c3
JO		 4230 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4231}
4232EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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